atheros_2_0_sdio_stack.patch

14 files changed, 9811 insertions, 0 deletions

diff --git a/drivers/sdio/stack/Makefile b/drivers/sdio/stack/Makefile
new file mode 100644
index 00000000000..ff0e24d0176
--- /dev/null
+++ b/drivers/sdio/stack/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_SDIO)      += busdriver/ lib/
\ No newline at end of file
diff --git a/drivers/sdio/stack/busdriver/Makefile b/drivers/sdio/stack/busdriver/Makefile
new file mode 100644
index 00000000000..1130e2d9139
--- /dev/null
+++ b/drivers/sdio/stack/busdriver/Makefile
@@ -0,0 +1,2 @@
+obj-$(CONFIG_SDIO) += sdio_busdriver.o
+sdio_busdriver-objs := sdio_bus.o sdio_function.o sdio_bus_misc.o sdio_bus_events.o sdio_bus_os.o
diff --git a/drivers/sdio/stack/busdriver/_busdriver.h b/drivers/sdio/stack/busdriver/_busdriver.h
new file mode 100644
index 00000000000..a85aed11692
--- /dev/null
+++ b/drivers/sdio/stack/busdriver/_busdriver.h
@@ -0,0 +1,466 @@
+/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+@file: _busdriver.h
+
+@abstract: internal include file for busdriver
+
+@notice: Copyright (c), 2004-2006 Atheros Communications, Inc.
+
+
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 as
+ *  published by the Free Software Foundation;
+ *
+ *  Software distributed under the License is distributed on an "AS
+ *  IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+ *  implied. See the License for the specific language governing
+ *  rights and limitations under the License.
+ *
+ *  Portions of this code were developed with information supplied from the
+ *  SD Card Association Simplified Specifications. The following conditions and disclaimers may apply:
+ *
+ *   The following conditions apply to the release of the SD simplified specification (�Simplified
+ *   Specification�) by the SD Card Association. The Simplified Specification is a subset of the complete
+ *   SD Specification which is owned by the SD Card Association. This Simplified Specification is provided
+ *   on a non-confidential basis subject to the disclaimers below. Any implementation of the Simplified
+ *   Specification may require a license from the SD Card Association or other third parties.
+ *   Disclaimers:
+ *   The information contained in the Simplified Specification is presented only as a standard
+ *   specification for SD Cards and SD Host/Ancillary products and is provided "AS-IS" without any
+ *   representations or warranties of any kind. No responsibility is assumed by the SD Card Association for
+ *   any damages, any infringements of patents or other right of the SD Card Association or any third
+ *   parties, which may result from its use. No license is granted by implication, estoppel or otherwise
+ *   under any patent or other rights of the SD Card Association or any third party. Nothing herein shall
+ *   be construed as an obligation by the SD Card Association to disclose or distribute any technical
+ *   information, know-how or other confidential information to any third party.
+ *
+ *
+ *  The initial developers of the original code are Seung Yi and Paul Lever
+ *
+ *  sdio@atheros.com
+ *
+ *
+
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+#ifndef ___BUSDRIVER_H___
+#define ___BUSDRIVER_H___
+#include <linux/sdio/sdio_lib.h>
+
+#define SDIODBG_FUNC_IRQ  (SDDBG_TRACE + 1)
+#define SDIODBG_REQUESTS  (SDDBG_TRACE + 2)
+#define SDIODBG_CD_TIMER  (SDDBG_TRACE + 3)
+#define SDIODBG_HCD_EVENTS  (SDDBG_TRACE + 4)
+
+#define SDIOBUS_CD_TIMER_ID 0
+
+#define SDBUS_MAX_RETRY   3
+
+/* Notes on list linkages:
+ *  list heads are held in BDCONTEXT
+ *  HcdList - SDHCD
+ *          one per registered host controller
+ *          Next - links of all HCDs
+ *  DeviceList SDDEVICE
+ *          one per inserted device
+ *          Next - links of all devices
+ *          DeviceListNext - links of all devices on a function
+ *          pFunction - ptr to Function supportting this device
+ *          pHcd - ptr to HCD with supporting this device
+ *  FunctionList SDFUNCTION
+ *          one per register function driver
+ *          Next - links of all functions
+ *          DeviceList - list of devices being support by this function
+ *                       uses DeviceListNext in SDDEVICE to link
+ *
+ *
+*/
+
+#define SDMMC_DEFAULT_CMD_RETRIES           1
+#define SDMMC_DEFAULT_CARD_READY_RETRIES    200
+#define OCR_READY_CHECK_DELAY_MS            10
+#define SDMMC_POWER_SETTLE_DELAY            400  /* in milliseconds */
+#define SDBUS_DEFAULT_REQ_LIST_SIZE         16
+#define SDBUS_DEFAULT_REQ_SIG_SIZE          8
+#define CARD_DETECT_PAUSE                   100
+#define SDBUS_DEFAULT_CD_POLLING_INTERVAL   1000  /* in milliseconds */
+#define MAX_CARD_DETECT_MSGS                16
+#define SDMMC_DEFAULT_BYTES_PER_BLOCK       2048
+#define SDMMC_DEFAULT_BLOCKS_PER_TRANS      512
+#define SDMMC_CMD13_POLLING_MULTIPLIER      1000 /* per block multiplier */
+#define MAX_HCD_REQ_RECURSION               5
+#define MAX_HCD_RECURSION_RUNAWAY           100
+
+    /* internal signalling item */
+typedef struct _SIGNAL_ITEM{
+    SDLIST       SDList;        /* list link*/
+    OS_SIGNAL    Signal;        /* signal */
+}SIGNAL_ITEM, *PSIGNAL_ITEM;
+
+typedef struct _HCD_EVENT_MESSAGE {
+    HCD_EVENT Event;    /* the event */
+    PSDHCD    pHcd;     /* hcd that generated the event */
+}HCD_EVENT_MESSAGE, *PHCD_EVENT_MESSAGE;
+
+/* internal data for bus driver */
+typedef struct _BDCONTEXT {
+
+    /* list of SD requests and signalling semaphores and a semaphore to protect it */
+    SDLIST  RequestList;
+    SDLIST  SignalList;
+    OS_CRITICALSECTION RequestListCritSection;
+    /* list of host controller bus drivers, sempahore to protect it */
+    SDLIST HcdList;
+    OS_SEMAPHORE HcdListSem;
+    /* list of inserted devices, semaphore to protect it */
+    SDLIST DeviceList;
+    OS_SEMAPHORE DeviceListSem;
+    /* list of function drivers, semaphore to protect it */
+    SDLIST FunctionList;
+    OS_SEMAPHORE FunctionListSem;
+    INT              RequestListSize;        /* default request list */
+    INT              SignalSemListSize;      /* default signalling semaphore size */
+    INT              CurrentRequestAllocations; /*current count of allocated requests */
+    INT              CurrentSignalAllocations;   /* current count of signal allocations */
+    INT              MaxRequestAllocations;  /* max number of allocated requests to keep around*/
+    INT              MaxSignalAllocations;   /* max number of signal allocations to keep around*/
+    INT              RequestRetries;         /* cmd retries */
+    INT              CardReadyPollingRetry;  /* card ready polling retry count */
+    INT              PowerSettleDelay;       /* power settle delay */
+    INT              CMD13PollingMultiplier; /* CMD13 (GET STATUS) multiplier */
+    SD_BUSCLOCK_RATE DefaultOperClock;       /* default operation clock */
+    SD_BUSMODE_FLAGS DefaultBusMode;         /* default bus mode */
+    UINT16           DefaultOperBlockLen;    /* default operational block length per block */
+    UINT16           DefaultOperBlockCount;  /* default operational block count per transaction */
+    UINT32           CDPollingInterval;      /* card insert/removal polling interval */
+    UINT8            InitMask;               /* bus driver init mask */
+#define BD_TIMER_INIT    0x01
+#define HELPER_INIT      0x02
+#define RESOURCE_INIT    0x04
+    BOOL             CDTimerQueued;          /* card detect timer queued */
+    OSKERNEL_HELPER  CardDetectHelper;       /* card detect helper */
+    PSDMESSAGE_QUEUE pCardDetectMsgQueue;    /* card detect message queue */
+    ULONG            HcdInUseField;          /* bit field of in use HCD numbers*/
+    UINT32           ConfigFlags;            /* bus driver configuration flags */
+#define BD_CONFIG_SDREQ_FORCE_ALL_ASYNC 0x00000001
+    INT              MaxHcdRecursion;        /* max HCD recurion level */
+}BDCONTEXT, *PBDCONTEXT;
+
+#define BD_DEFAULT_CONFIG_FLAGS 0x00000000
+#define IsQueueBusy(pRequestQueue)      (pRequestQueue)->Busy
+#define MarkQueueBusy(pRequestQueue)    (pRequestQueue)->Busy = TRUE
+#define MarkQueueNotBusy(pRequestQueue) (pRequestQueue)->Busy = FALSE
+
+#define CLEAR_INTERNAL_REQ_FLAGS(pReq) (pReq)->Flags &= ~(UINT)((SDREQ_FLAGS_RESP_SPI_CONVERTED | \
+                                                          SDREQ_FLAGS_FORCE_DEFERRED_COMPLETE))
+
+/* macros to insert request into the queue */
+#define QueueRequest(pReqQ,pReq) SDListInsertTail(&(pReqQ)->Queue,&(pReq)->SDList)
+#define QueueRequestToFront(pReqQ,pReq) SDListInsertHead(&(pReqQ)->Queue,&(pReq)->SDList)
+
+/* macros to remove an item from the head of the queue */
+static INLINE PSDREQUEST DequeueRequest(PSDREQUESTQUEUE pRequestQueue) {
+    PSDLIST pItem;
+    pItem = SDListRemoveItemFromHead(&pRequestQueue->Queue);
+    if (pItem != NULL) {
+        return CONTAINING_STRUCT(pItem, SDREQUEST, SDList);
+    }
+    return NULL;
+};
+
+static INLINE SDIO_STATUS InitializeRequestQueue(PSDREQUESTQUEUE pRequestQueue) {
+    SDLIST_INIT(&pRequestQueue->Queue);
+    MarkQueueNotBusy(pRequestQueue);
+    return SDIO_STATUS_SUCCESS;
+}
+
+static INLINE void CleanupRequestQueue(PSDREQUESTQUEUE pRequestQueue) {
+
+}
+
+/* for bus driver internal use only */
+SDIO_STATUS _SDIO_BusDriverInitialize(void);
+SDIO_STATUS _SDIO_BusGetDefaultSettings(PBDCONTEXT pBdc);
+void _SDIO_BusDriverCleanup(void);
+SDIO_STATUS RemoveAllFunctions(void);
+SDIO_STATUS RemoveHcdFunctions(PSDHCD pHcd);
+PSDDEVICE AllocateDevice(PSDHCD pHcd);
+BOOL AddDeviceToList(PSDDEVICE pDevice);
+SDIO_STATUS DeleteDevices(PSDHCD pHcd);
+SDIO_STATUS NotifyDeviceRemove(PSDDEVICE pDevice);
+extern PBDCONTEXT pBusContext;
+extern const CT_VERSION_CODE g_Version;
+SDIO_STATUS _SDIO_RegisterHostController(PSDHCD pHcd);
+SDIO_STATUS _SDIO_UnregisterHostController(PSDHCD pHcd);
+SDIO_STATUS _SDIO_HandleHcdEvent(PSDHCD pHcd, HCD_EVENT Event);
+SDIO_STATUS _SDIO_RegisterFunction(PSDFUNCTION pFunction);
+SDIO_STATUS _SDIO_UnregisterFunction(PSDFUNCTION pFunction);
+SDIO_STATUS _SDIO_CheckResponse(PSDHCD pHcd, PSDREQUEST pReq, SDHCD_RESPONSE_CHECK_MODE CheckMode);
+SDIO_STATUS ProbeForFunction(PSDDEVICE pDevice, PSDHCD pHcd);
+SDIO_STATUS SDInitializeCard(PSDHCD pHcd);
+SDIO_STATUS SDQuerySDMMCInfo(PSDDEVICE pDevice);
+SDIO_STATUS SDQuerySDIOInfo(PSDDEVICE pDevice);
+SDIO_STATUS SDEnableFunction(PSDDEVICE pDevice, PSDCONFIG_FUNC_ENABLE_DISABLE_DATA pEnData);
+SDIO_STATUS SDAllocFreeSlotCurrent(PSDDEVICE pDevice, BOOL Allocate, PSDCONFIG_FUNC_SLOT_CURRENT_DATA pData);
+SDIO_STATUS SDMaskUnmaskFunctionIRQ(PSDDEVICE pDevice, BOOL Mask);
+SDIO_STATUS SDFunctionAckInterrupt(PSDDEVICE pDevice);
+SDIO_STATUS SDSPIModeEnableDisableCRC(PSDDEVICE pDevice,BOOL Enable);
+SDIO_STATUS IssueBusConfig(PSDDEVICE pDev, PSDCONFIG pConfig);
+SDIO_STATUS IssueBusRequest(PSDDEVICE pDev, PSDREQUEST pReq);
+PSDREQUEST IssueAllocRequest(PSDDEVICE pDev);
+void IssueFreeRequest(PSDDEVICE pDev, PSDREQUEST pReq);
+PSDREQUEST AllocateRequest(void);
+void FreeRequest(PSDREQUEST pReq);
+PSIGNAL_ITEM AllocateSignal(void);
+void FreeSignal(PSIGNAL_ITEM pSignal);
+SDIO_STATUS InitializeTimers(void);
+SDIO_STATUS CleanupTimers(void);
+SDIO_STATUS QueueTimer(INT TimerID, UINT32 TimeOut);
+SDIO_STATUS DeviceAttach(PSDHCD pHcd);
+SDIO_STATUS DeviceDetach(PSDHCD pHcd);
+SDIO_STATUS DeviceInterrupt(PSDHCD pHcd);
+SDIO_STATUS CardInitSetup(PSDHCD pHcd);
+void RunCardDetect(void);
+void SDIO_NotifyTimerTriggered(INT TimerID);
+SDIO_STATUS TestPresence(PSDHCD          pHcd,
+                         CARD_INFO_FLAGS TestType,
+                         PSDREQUEST      pReq);
+#define _IssueSimpleBusRequest(pHcd,Cmd,Arg,Flags,pReqToUse) \
+          _IssueBusRequestBd((pHcd),(Cmd),(Arg),(Flags),(pReqToUse),NULL,0)
+
+SDIO_STATUS Do_OS_IncHcdReference(PSDHCD pHcd);
+SDIO_STATUS Do_OS_DecHcdReference(PSDHCD pHcd);
+SDIO_STATUS TryNoIrqPendingCheck(PSDDEVICE pDev);
+
+    /* check API version compatibility of an HCD or function driver to a stack major/minor version
+     if the driver version is greater than the major number, we are compatible
+     if the driver version is equal, then we check if the minor is greater than or equal
+     we don't have to check for the less than major, because the bus driver never loads
+     drivers with different major numbers ...
+     if the busdriver compiled version major is greater than the major version being checked this
+     macro will resolved to ALWAYS true thus optimizing the code to not check the HCD since
+     as a rule we never load an HCD with a lower major number */
+#define CHECK_API_VERSION_COMPAT(p,major,minor)       \
+     ((CT_SDIO_STACK_VERSION_MAJOR(CT_SDIO_STACK_VERSION_CODE) > (major)) || \
+      (GET_SDIO_STACK_VERSION_MINOR((p)) >= (minor)))
+
+static INLINE SDIO_STATUS OS_IncHcdReference(PSDHCD pHcd) {
+        /* this API was added in version 2.3 which requires access to a field in the HCD structure */
+    if (CHECK_API_VERSION_COMPAT(pHcd,2,3)) {
+            /* we can safely call the OS-dependent function */
+        return Do_OS_IncHcdReference(pHcd);
+    }
+    return SDIO_STATUS_SUCCESS;
+}
+
+static INLINE SDIO_STATUS OS_DecHcdReference(PSDHCD pHcd) {
+            /* this API was added in version 2.3 which requires access to a field in the HCD structure */
+    if (CHECK_API_VERSION_COMPAT(pHcd,2,3)) {
+            /* we can safely call the OS-dependent function */
+        return Do_OS_DecHcdReference(pHcd);
+    }
+    return SDIO_STATUS_SUCCESS;
+}
+
+SDIO_STATUS _IssueBusRequestBd(PSDHCD           pHcd,
+                               UINT8            Cmd,
+                               UINT32           Argument,
+                               SDREQUEST_FLAGS  Flags,
+                               PSDREQUEST       pReqToUse,
+                               PVOID            pData,
+                               INT              Length);
+
+SDIO_STATUS IssueRequestToHCD(PSDHCD pHcd,PSDREQUEST pReq);
+
+#define CALL_HCD_CONFIG(pHcd,pCfg) (pHcd)->pConfigure((pHcd),(pCfg))
+    /* macro to force all requests to be asynchronous in the HCD */
+static INLINE BOOL ForceAllRequestsAsync(void) {
+    return (pBusContext->ConfigFlags & BD_CONFIG_SDREQ_FORCE_ALL_ASYNC);
+}
+
+static INLINE SDIO_STATUS CallHcdRequest(PSDHCD pHcd) {
+
+    if (pHcd->pCurrentRequest->Flags & SDREQ_FLAGS_PSEUDO) {
+        DBG_PRINT(SDIODBG_REQUESTS, ("SDIO Bus Driver: PSEUDO Request 0x%X \n",
+                    (INT)pHcd->pCurrentRequest));
+            /* return successful completion so that processing can finish */
+        return SDIO_STATUS_SUCCESS;
+    }
+
+    if (ForceAllRequestsAsync()) {
+            /* all requests must be completed(indicated) in a separate context */
+        pHcd->pCurrentRequest->Flags |= SDREQ_FLAGS_FORCE_DEFERRED_COMPLETE;
+    } else {
+            /* otherwise perform a test on flags in the HCD */
+        if (!CHECK_API_VERSION_COMPAT(pHcd,2,6) &&
+            AtomicTest_Set(&pHcd->HcdFlags, HCD_REQUEST_CALL_BIT)) {
+
+            /* bit was already set, this is a recursive call,
+             * we need to tell the HCD to complete the
+             * request in a separate context */
+            DBG_PRINT(SDIODBG_REQUESTS, ("SDIO Bus Driver: Recursive CallHcdRequest \n"));
+            pHcd->pCurrentRequest->Flags |= SDREQ_FLAGS_FORCE_DEFERRED_COMPLETE;
+        }
+    }
+ #if DEBUG
+    {
+        SDIO_STATUS status;
+        BOOL forceDeferred;
+        forceDeferred = pHcd->pCurrentRequest->Flags & SDREQ_FLAGS_FORCE_DEFERRED_COMPLETE;
+        status = pHcd->pRequest(pHcd);
+        if (forceDeferred) {
+                /* status better be pending... */
+            DBG_ASSERT(status == SDIO_STATUS_PENDING);
+        }
+        return status;
+    }
+ #else
+    return pHcd->pRequest(pHcd);
+ #endif
+
+}
+
+/* note the caller of this macro must take the HCD lock to protect the count */
+#define CHECK_HCD_RECURSE(pHcd,pReq)   \
+{                                      \
+    (pHcd)->Recursion++;               \
+    DBG_ASSERT((pHcd)->Recursion < MAX_HCD_RECURSION_RUNAWAY); \
+    if ((pHcd)->Recursion > pBusContext->MaxHcdRecursion) {    \
+        DBG_PRINT(SDIODBG_REQUESTS, ("SDIO Bus Driver: Recursive Request Count Exceeded (%d) \n",(pHcd)->Recursion)); \
+        (pReq)->Flags |= SDREQ_FLAGS_FORCE_DEFERRED_COMPLETE; \
+    }                                                         \
+}
+
+/* InternalFlags bit number settings */
+#define SDBD_INIT        1
+#define SDBD_PENDING    15
+#define SDBD_ALLOC_IRQ_SAFE     2
+
+#define SDBD_ALLOC_IRQ_SAFE_MASK (1 << SDBD_ALLOC_IRQ_SAFE)
+
+static void INLINE DoRequestCompletion(PSDREQUEST pReq, PSDHCD pHcd) {
+    CLEAR_INTERNAL_REQ_FLAGS(pReq);
+    if (pReq->pCompletion != NULL) {
+        DBG_PRINT(SDIODBG_REQUESTS, ("SDIO Bus Driver: Calling completion on request:0x%X, CMD:%d \n",
+           (INT)pReq, pReq->Command));
+            /* call completion routine, mark request reusable */
+        AtomicTest_Clear(&pReq->InternalFlags, SDBD_PENDING);
+        pReq->pCompletion(pReq);
+    } else {
+            /* mark request reusable */
+        AtomicTest_Clear(&pReq->InternalFlags, SDBD_PENDING);
+    }
+}
+
+THREAD_RETURN CardDetectHelperFunction(POSKERNEL_HELPER pHelper);
+THREAD_RETURN SDIOIrqHelperFunction(POSKERNEL_HELPER pHelper);
+
+void ConvertSPI_Response(PSDREQUEST pReq, UINT8 *pRespBuffer);
+
+static INLINE SDIO_STATUS PostCardDetectEvent(PBDCONTEXT pSDB, HCD_EVENT Event, PSDHCD pHcd) {
+    HCD_EVENT_MESSAGE message;
+    SDIO_STATUS       status;
+    message.Event = Event;
+    message.pHcd = pHcd;
+
+    if (pHcd != NULL) {
+            /* increment HCD reference count to process this HCD message */
+        status = OS_IncHcdReference(pHcd);
+        if (!SDIO_SUCCESS(status)) {
+            return status;
+        }
+    }
+        /* post card detect message */
+    status = SDLIB_PostMessage(pSDB->pCardDetectMsgQueue, &message, sizeof(message));
+    if (!SDIO_SUCCESS(status)) {
+        DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: PostCardDetectEvent error status %d\n",status));
+        if (pHcd != NULL) {
+                /* decrement count */
+            OS_DecHcdReference(pHcd);
+        }
+        return status;
+    }
+        /* wake card detect helper */
+    DBG_PRINT(SDIODBG_HCD_EVENTS, ("SDIO Bus Driver: PostCardDetectEvent waking\n"));
+    return SD_WAKE_OS_HELPER(&pSDB->CardDetectHelper);
+};
+
+/* initialize device fields */
+static INLINE void InitDeviceData(PSDHCD pHcd, PSDDEVICE pDevice) {
+    ZERO_POBJECT(pDevice);
+    SDLIST_INIT(&pDevice->SDList);
+    SDLIST_INIT(&pDevice->FuncListLink);
+    pDevice->pRequest = IssueBusRequest;
+    pDevice->pConfigure = IssueBusConfig;
+    pDevice->AllocRequest = IssueAllocRequest;
+    pDevice->FreeRequest = IssueFreeRequest;
+        /* set card flags in the ID */
+    pDevice->pId[0].CardFlags = pHcd->CardProperties.Flags;
+    pDevice->pFunction = NULL;
+    pDevice->pHcd = pHcd;
+    SET_SDIO_STACK_VERSION(pDevice);
+}
+
+/* de-initialize device fields */
+static INLINE void DeinitDeviceData(PSDDEVICE pDevice) {
+}
+
+/* reset hcd state */
+static INLINE void ResetHcdState(PSDHCD pHcd) {
+    ZERO_POBJECT(&pHcd->CardProperties);
+    pHcd->PendingHelperIrqs = 0;
+    pHcd->PendingIrqAcks = 0;
+    pHcd->IrqsEnabled = 0;
+    pHcd->pCurrentRequest = NULL;
+    pHcd->IrqProcState = SDHCD_IDLE;
+        /* mark this device as special */
+    pHcd->pPseudoDev->pId[0].CardFlags = CARD_PSEUDO;
+    pHcd->SlotCurrentAllocated = 0;
+}
+
+static INLINE SDIO_STATUS _IssueConfig(PSDHCD           pHcd,
+                                       SDCONFIG_COMMAND Command,
+                                       PVOID            pData,
+                                       INT              Length){
+    SDCONFIG  configHdr;
+    SET_SDCONFIG_CMD_INFO(&configHdr,Command,pData,Length);
+    return CALL_HCD_CONFIG(pHcd,&configHdr);
+}
+
+/* prototypes */
+#define _AcquireHcdLock(pHcd)CriticalSectionAcquireSyncIrq(&(pHcd)->HcdCritSection)
+#define _ReleaseHcdLock(pHcd)CriticalSectionReleaseSyncIrq(&(pHcd)->HcdCritSection)
+
+#define AcquireHcdLock(pDev) CriticalSectionAcquireSyncIrq(&(pDev)->pHcd->HcdCritSection)
+#define ReleaseHcdLock(pDev) CriticalSectionReleaseSyncIrq(&(pDev)->pHcd->HcdCritSection)
+
+SDIO_STATUS OS_AddDevice(PSDDEVICE pDevice, PSDFUNCTION pFunction);
+void OS_RemoveDevice(PSDDEVICE pDevice);
+SDIO_STATUS OS_InitializeDevice(PSDDEVICE pDevice, PSDFUNCTION pFunction);
+SDIO_STATUS SetOperationalBusMode(PSDDEVICE               pDevice,
+                                  PSDCONFIG_BUS_MODE_DATA pBusMode);
+void FreeDevice(PSDDEVICE pDevice);
+BOOL IsPotentialIdMatch(PSD_PNP_INFO pIdsDev, PSD_PNP_INFO pIdsFuncList);
+
+
+#define CHECK_FUNCTION_DRIVER_VERSION(pF) \
+    (GET_SDIO_STACK_VERSION_MAJOR((pF)) == CT_SDIO_STACK_VERSION_MAJOR(g_Version))
+#define CHECK_HCD_DRIVER_VERSION(pH) \
+    (GET_SDIO_STACK_VERSION_MAJOR((pH)) == CT_SDIO_STACK_VERSION_MAJOR(g_Version))
+
+/* CLARIFICATION on SDREQ_FLAGS_PSEUDO and SDREQ_FLAGS_BARRIER flags :
+ *
+ * A request marked as PSEUDO is synchronized with bus requests and is not a true request
+ * that is issued to an HCD.
+ *
+ * A request marked with a BARRIER flag requires that the completion routine be called
+ * before the next bus request starts.  This is required for HCD requests that can change
+ * bus or clock modes.  Changing the clock or bus mode while a bus request is pending
+ * can cause problems.
+ *
+ *
+ *
+ * */
+#define SD_PSEUDO_REQ_FLAGS \
+      (SDREQ_FLAGS_PSEUDO | SDREQ_FLAGS_BARRIER | SDREQ_FLAGS_TRANS_ASYNC)
+
+#endif /*___BUSDRIVER_H___*/
diff --git a/drivers/sdio/stack/busdriver/sdio_bus.c b/drivers/sdio/stack/busdriver/sdio_bus.c
new file mode 100644
index 00000000000..ffc1e9f958d
--- /dev/null
+++ b/drivers/sdio/stack/busdriver/sdio_bus.c
@@ -0,0 +1,2120 @@
+/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+@file: sdio_bus.c
+
+@abstract: OS independent bus driver support
+@category abstract: HD_Reference Host Controller Driver Interfaces.
+@category abstract: PD_Reference
+    Peripheral Driver Interfaces.
+
+#notes: this file supports the HCD's and generic functions
+
+@notice: Copyright (c), 2004-2006 Atheros Communications, Inc.
+
+
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 as
+ *  published by the Free Software Foundation;
+ *
+ *  Software distributed under the License is distributed on an "AS
+ *  IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+ *  implied. See the License for the specific language governing
+ *  rights and limitations under the License.
+ *
+ *  Portions of this code were developed with information supplied from the
+ *  SD Card Association Simplified Specifications. The following conditions and disclaimers may apply:
+ *
+ *   The following conditions apply to the release of the SD simplified specification (�Simplified
+ *   Specification�) by the SD Card Association. The Simplified Specification is a subset of the complete
+ *   SD Specification which is owned by the SD Card Association. This Simplified Specification is provided
+ *   on a non-confidential basis subject to the disclaimers below. Any implementation of the Simplified
+ *   Specification may require a license from the SD Card Association or other third parties.
+ *   Disclaimers:
+ *   The information contained in the Simplified Specification is presented only as a standard
+ *   specification for SD Cards and SD Host/Ancillary products and is provided "AS-IS" without any
+ *   representations or warranties of any kind. No responsibility is assumed by the SD Card Association for
+ *   any damages, any infringements of patents or other right of the SD Card Association or any third
+ *   parties, which may result from its use. No license is granted by implication, estoppel or otherwise
+ *   under any patent or other rights of the SD Card Association or any third party. Nothing herein shall
+ *   be construed as an obligation by the SD Card Association to disclose or distribute any technical
+ *   information, know-how or other confidential information to any third party.
+ *
+ *
+ *  The initial developers of the original code are Seung Yi and Paul Lever
+ *
+ *  sdio@atheros.com
+ *
+ *
+
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+#define MODULE_NAME  SDBUSDRIVER
+#include <linux/sdio/ctsystem.h>
+#include <linux/sdio/sdio_busdriver.h>
+#include <linux/sdio/_sdio_defs.h>
+#include <linux/sdio/sdio_lib.h>
+#include <linux/sdio/mmc_defs.h>
+#include "_busdriver.h"
+
+/* list of host controller bus drivers */
+PBDCONTEXT pBusContext = NULL;
+static void CleanUpBusResources(void);
+static SDIO_STATUS AllocateBusResources(void);
+static PSIGNAL_ITEM BuildSignal(void);
+static void DestroySignal(PSIGNAL_ITEM pSignal);
+
+const CT_VERSION_CODE g_Version = CT_SDIO_STACK_VERSION_CODE;
+/*
+ * _SDIO_BusDriverInitialize - call once on driver loading
+ *
+*/
+SDIO_STATUS _SDIO_BusDriverInitialize(void)
+{
+    SDIO_STATUS status = SDIO_STATUS_SUCCESS;
+
+    DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: Version: %d.%d\n",
+       CT_SDIO_STACK_VERSION_MAJOR(g_Version),CT_SDIO_STACK_VERSION_MINOR(g_Version)));
+
+    DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: enter _SDIO_BusDriverInitialize\n"));
+
+    do {
+        /* allocate our internal data initialize it */
+        pBusContext = KernelAlloc(sizeof(BDCONTEXT));
+        if (pBusContext == NULL) {
+            DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: _SDIO_BusDriverInitialize can't allocate memory.\n"));
+            status = SDIO_STATUS_NO_RESOURCES;
+            break;
+        }
+        memset(pBusContext,0,sizeof(BDCONTEXT));
+        SDLIST_INIT(&pBusContext->RequestList);
+        SDLIST_INIT(&pBusContext->HcdList);
+        SDLIST_INIT(&pBusContext->DeviceList);
+        SDLIST_INIT(&pBusContext->FunctionList);
+        SDLIST_INIT(&pBusContext->SignalList);
+
+            /* setup defaults */
+        pBusContext->RequestRetries = SDMMC_DEFAULT_CMD_RETRIES;
+        pBusContext->CardReadyPollingRetry = SDMMC_DEFAULT_CARD_READY_RETRIES;
+        pBusContext->PowerSettleDelay = SDMMC_POWER_SETTLE_DELAY;
+        pBusContext->DefaultOperClock = MMC_HS_MAX_BUS_CLOCK;
+        pBusContext->DefaultBusMode = SDCONFIG_BUS_WIDTH_4_BIT;
+        pBusContext->RequestListSize = SDBUS_DEFAULT_REQ_LIST_SIZE;
+        pBusContext->SignalSemListSize = SDBUS_DEFAULT_REQ_SIG_SIZE;
+        pBusContext->CDPollingInterval = SDBUS_DEFAULT_CD_POLLING_INTERVAL;
+        pBusContext->DefaultOperBlockLen = SDMMC_DEFAULT_BYTES_PER_BLOCK;
+        pBusContext->DefaultOperBlockCount = SDMMC_DEFAULT_BLOCKS_PER_TRANS;
+        pBusContext->ConfigFlags = BD_DEFAULT_CONFIG_FLAGS;
+        pBusContext->CMD13PollingMultiplier = SDMMC_CMD13_POLLING_MULTIPLIER;
+        pBusContext->MaxHcdRecursion = MAX_HCD_REQ_RECURSION;
+
+            /* get overrides for the defaults */
+        status = _SDIO_BusGetDefaultSettings(pBusContext);
+        if (!SDIO_SUCCESS(status)) {
+            break;
+        }
+
+        pBusContext->MaxRequestAllocations = pBusContext->RequestListSize << 1;
+        pBusContext->MaxSignalAllocations = pBusContext->SignalSemListSize << 1;
+
+        status = CriticalSectionInit(&pBusContext->RequestListCritSection);
+        if (!SDIO_SUCCESS(status)) {
+            DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: _SDIO_BusDriverInitialize can't CriticalSectionInit.\n"));
+            break;
+        }
+        status = SemaphoreInitialize(&pBusContext->HcdListSem, 1);
+        if (!SDIO_SUCCESS(status)) {
+            DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: _SDIO_BusDriverInitialize can't SemaphoreInitialize HcdListSem.\n"));
+            break;
+        }
+        status = SemaphoreInitialize(&pBusContext->DeviceListSem, 1);
+        if (!SDIO_SUCCESS(status)) {
+            DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: _SDIO_BusDriverInitialize can't SemaphoreInitialize DeviceListSem.\n"));
+            break;
+        }
+        status = SemaphoreInitialize(&pBusContext->FunctionListSem, 1);
+        if (!SDIO_SUCCESS(status)) {
+            DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: _SDIO_BusDriverInitialize can't SemaphoreInitialize FunctionListSem.\n"));
+            break;
+        }
+        status = AllocateBusResources();
+        if (!SDIO_SUCCESS(status)) {
+            DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: _SDIO_BusDriverInitialize can't AllocateBusResources.\n"));
+            break;
+        }
+
+        pBusContext->InitMask |= RESOURCE_INIT;
+
+        pBusContext->pCardDetectMsgQueue = SDLIB_CreateMessageQueue(MAX_CARD_DETECT_MSGS,
+                                                                   sizeof(HCD_EVENT_MESSAGE));
+
+        if (NULL == pBusContext->pCardDetectMsgQueue) {
+            DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: _SDIO_BusDriverInitialize can't CreateMessageQueue.\n"));
+            status = SDIO_STATUS_NO_RESOURCES;
+            break;
+        }
+
+        status = SDLIB_OSCreateHelper(&pBusContext->CardDetectHelper,
+                                      CardDetectHelperFunction,
+                                      NULL);
+
+        if (!SDIO_SUCCESS(status)) {
+            DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: _SDIO_BusDriverInitialize can't OSCreateHelper.\n"));
+            break;
+        }
+
+        pBusContext->InitMask |= HELPER_INIT;
+
+        status = InitializeTimers();
+        if (!SDIO_SUCCESS(status)) {
+            DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: _SDIO_BusDriverInitialize can't InitializeTimers.\n"));
+            break;
+        }
+        pBusContext->InitMask |= BD_TIMER_INIT;
+    } while(FALSE);
+
+    if (!SDIO_SUCCESS(status)) {
+        _SDIO_BusDriverCleanup();
+    }
+
+    return status;
+}
+
+
+/*
+ * _SDIO_BusDriverBusDriverCleanup - call once on driver unloading
+ *
+*/
+void _SDIO_BusDriverCleanup(void) {
+    DBG_PRINT(SDDBG_TRACE, ("+SDIO Bus Driver: _SDIO_BusDriverCleanup\n"));
+
+    if (pBusContext->InitMask & BD_TIMER_INIT) {
+        CleanupTimers();
+    }
+
+    if (pBusContext->InitMask & HELPER_INIT) {
+        SDLIB_OSDeleteHelper(&pBusContext->CardDetectHelper);
+    }
+
+    if (pBusContext->pCardDetectMsgQueue != NULL) {
+        SDLIB_DeleteMessageQueue(pBusContext->pCardDetectMsgQueue);
+        pBusContext->pCardDetectMsgQueue = NULL;
+    }
+        /* remove functions */
+    RemoveAllFunctions();
+        /* cleanup all devices */
+    DeleteDevices(NULL);
+    CleanUpBusResources();
+    CriticalSectionDelete(&pBusContext->RequestListCritSection);
+    SemaphoreDelete(&pBusContext->HcdListSem);
+    SemaphoreDelete(&pBusContext->DeviceListSem);
+    SemaphoreDelete(&pBusContext->FunctionListSem);
+    KernelFree(pBusContext);
+    pBusContext = NULL;
+    DBG_PRINT(SDDBG_TRACE, ("-SDIO Bus Driver: _SDIO_BusDriverCleanup\n"));
+}
+
+
+/* cleanup hcd */
+static void CleanupHcd(PSDHCD pHcd)
+{
+    SDLIB_OSDeleteHelper(&pHcd->SDIOIrqHelper);
+    CleanupRequestQueue(&pHcd->CompletedRequestQueue);
+    CleanupRequestQueue(&pHcd->RequestQueue);
+    CriticalSectionDelete(&pHcd->HcdCritSection);
+    SemaphoreDelete(&pHcd->ConfigureOpsSem);
+    pHcd->pCurrentRequest = NULL;
+    if (pHcd->pPseudoDev != NULL) {
+        FreeDevice(pHcd->pPseudoDev);
+        pHcd->pPseudoDev = NULL;
+    }
+}
+
+/* set up the hcd */
+static SDIO_STATUS SetupHcd(PSDHCD pHcd)
+{
+    SDIO_STATUS status;
+
+    ZERO_POBJECT(&pHcd->SDIOIrqHelper);
+    ZERO_POBJECT(&pHcd->ConfigureOpsSem);
+    ZERO_POBJECT(&pHcd->HcdCritSection);
+    ZERO_POBJECT(&pHcd->RequestQueue);
+    ZERO_POBJECT(&pHcd->CompletedRequestQueue);
+    pHcd->pPseudoDev = NULL;
+    pHcd->Recursion = 0;
+
+    do {
+
+        pHcd->pPseudoDev = AllocateDevice(pHcd);
+
+        if (NULL == pHcd->pPseudoDev) {
+            status = SDIO_STATUS_NO_RESOURCES;
+            break;
+        }
+
+        ResetHcdState(pHcd);
+
+        status = SemaphoreInitialize(&pHcd->ConfigureOpsSem,1);
+        if (!SDIO_SUCCESS(status)) {
+            break;
+        }
+        status = CriticalSectionInit(&pHcd->HcdCritSection);
+        if (!SDIO_SUCCESS(status)) {
+            break;
+        }
+        status = InitializeRequestQueue(&pHcd->RequestQueue);
+        if (!SDIO_SUCCESS(status)) {
+            break;
+        }
+        status = InitializeRequestQueue(&pHcd->CompletedRequestQueue);
+        if (!SDIO_SUCCESS(status)) {
+            break;
+        }
+            /* create SDIO Irq helper */
+        status = SDLIB_OSCreateHelper(&pHcd->SDIOIrqHelper,
+                                      SDIOIrqHelperFunction,
+                                     (PVOID)pHcd);
+    } while(FALSE);
+
+    if (!SDIO_SUCCESS(status)) {
+            /* undo what we did */
+        CleanupHcd(pHcd);
+    }
+    return status;
+}
+
+
+/*
+ * _SDIO_RegisterHostController - register a host controller bus driver
+ *
+*/
+
+/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  @function: Register a host controller driver with the bus driver.
+
+  @function name: SDIO_RegisterHostController
+  @prototype: SDIO_STATUS SDIO_RegisterHostController (PSDHCD pHcd)
+  @category: HD_Reference
+
+  @input:  pHcd - the host controller definition structure.
+
+  @output: none
+
+  @return: SDIO_STATUS - SDIO_STATUS_SUCCESS when successful.
+
+  @notes: Each host controller driver must register with the bus driver when loaded.
+          The driver registers an SDHCD structure initialized with hardware properties
+          and callback functions for bus requests and configuration.  On multi-slot
+          hardware ,each slot should be registered with a separate SDHCD structure.
+          The bus driver views each slot as a seperate host controller object.
+          The driver should be prepared to receive configuration requests before
+          this call returns. The host controller driver must unregister itself when
+          shutting down.
+
+  @example: Registering a host controller driver:
+    static SDHCD Hcd = {
+       .pName = "sdio_custom_hcd",
+       .Version = CT_SDIO_STACK_VERSION_CODE,  // set stack version code
+       .SlotNumber = 0,                        // bus driver internal use
+       .Attributes = SDHCD_ATTRIB_BUS_1BIT | SDHCD_ATTRIB_BUS_4BIT | SDHCD_ATTRIB_MULTI_BLK_IRQ
+                     SDHCD_ATTRIB_AUTO_CMD12 ,
+       .MaxBytesPerBlock = 2048     // each data block can be up to 2048 bytes
+       .MaxBlocksPerTrans = 1024,   // each data transaction can consist of 1024 blocks
+       .MaxSlotCurrent = 500,       // max FET switch current rating
+       .SlotVoltageCaps = SLOT_POWER_3_3V,      // only 3.3V operation
+       .SlotVoltagePreferred = SLOT_POWER_3_3V,
+       .MaxClockRate = 24000000,   // 24 Mhz max operation
+       .pContext = &HcdContext,    // set our driver context
+       .pRequest = HcdRequest,     // set SDIO bus request callback
+       .pConfigure = HcdConfig,    // set SDIO bus configuration callback
+    };
+    if (!SDIO_SUCCESS((status = SDIO_RegisterHostController(&Hcd)))) {
+         DBG_PRINT(SDDBG_ERROR, ("SDIO HCD - failed to register with host, status =%d\n",
+                                    status));
+    }
+
+  @see also: SDIO_UnregisterHostController
+
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+SDIO_STATUS _SDIO_RegisterHostController(PSDHCD pHcd) {
+    SDIO_STATUS status = SDIO_STATUS_SUCCESS;
+
+    DBG_PRINT(SDDBG_TRACE, ("+SDIO Bus Driver: _SDIO_RegisterHostController - %s\n",pHcd->pName));
+    DBG_PRINT(SDDBG_TRACE, ("+SDIO Bus Driver: Host Controller Stack Version: %d.%d \n",
+        GET_SDIO_STACK_VERSION_MAJOR(pHcd),GET_SDIO_STACK_VERSION_MINOR(pHcd)));
+
+    if (!CHECK_HCD_DRIVER_VERSION(pHcd)) {
+        DBG_PRINT(SDDBG_ERROR,
+           ("SDIO Bus Driver: HCD Major Version Mismatch (hcd = %d, bus driver = %d)\n",
+           GET_SDIO_STACK_VERSION_MAJOR(pHcd), CT_SDIO_STACK_VERSION_MAJOR(g_Version)));
+        return SDIO_STATUS_INVALID_PARAMETER;
+    }
+        /* setup hcd */
+    status = SetupHcd(pHcd);
+    if (!SDIO_SUCCESS(status)) {
+        return status;
+    }
+
+    do {
+        INT slotNumber;
+
+            /* protect the HCD list */
+        if (!SDIO_SUCCESS((status = SemaphorePendInterruptable(&pBusContext->HcdListSem)))) {
+            break;  /* wait interrupted */
+        }
+            /* find a unique number for this HCD, must be done under semaphore protection */
+        slotNumber = FirstClearBit(&pBusContext->HcdInUseField);
+        if (slotNumber < 0) {
+            DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: _SDIO_RegisterHostController, error, slotNumber exceeded\n"));
+            /* fake something */
+            slotNumber = 31;
+        }
+        SetBit(&pBusContext->HcdInUseField, slotNumber);
+        pHcd->SlotNumber = slotNumber;
+            /* add HCD to the end of the internal list */
+        SDListAdd(&pBusContext->HcdList , &pHcd->SDList);
+        if (!SDIO_SUCCESS((status = SemaphorePost(&pBusContext->HcdListSem)))) {
+            break;   /* wait interrupted */
+        }
+        if (pHcd->Attributes & SDHCD_ATTRIB_SLOT_POLLING) {
+                /* post message to card detect helper to do polling */
+            PostCardDetectEvent(pBusContext, EVENT_HCD_CD_POLLING, NULL);
+        }
+    } while (FALSE);
+
+    if (!SDIO_SUCCESS(status)) {
+       CleanupHcd(pHcd);
+       DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: _SDIO_RegisterHostController, error 0x%X.\n", status));
+    }
+    DBG_PRINT(SDDBG_TRACE, ("-SDIO Bus Driver: _SDIO_RegisterHostController\n"));
+    return status;
+}
+
+/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  @function: Unregister a host controller driver with the bus driver.
+
+  @function name: SDIO_UnregisterHostController
+  @prototype: SDIO_STATUS SDIO_UnregisterHostController (PSDHCD pHcd)
+  @category: HD_Reference
+
+  @input:  pHcd - the host controller definition structure that was registered.
+
+  @output: none
+
+  @return: SDIO_STATUS - SDIO_STATUS_SUCCESS when successful.
+
+  @notes: Each host controller driver must unregister with the bus driver when
+          unloading. The driver is responsible for halting any outstanding I/O
+          operations.  The bus driver will automatically unload function drivers
+          that may be attached assigned to cards inserted into slots.
+
+  @example: Unregistering a host controller driver:
+    if (!SDIO_SUCCESS((status = SDIO_UnregisterHostController(&Hcd)))) {
+         DBG_PRINT(SDDBG_ERROR, ("SDIO HCD - failed to unregister with host, status =%d\n",
+                                    status));
+    }
+
+  @see also: SDIO_RegisterHostController
+
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+SDIO_STATUS _SDIO_UnregisterHostController(PSDHCD pHcd) {
+    SDIO_STATUS status = SDIO_STATUS_SUCCESS;
+
+    DBG_PRINT(SDDBG_TRACE, ("+SDIO Bus Driver: _SDIO_UnregisterHostController\n"));
+
+        /* remove functions associated with the HCD */
+    RemoveHcdFunctions(pHcd);
+        /* remove any devices associated with the HCD */
+    DeleteDevices(pHcd);
+    /* wait for the message queue to be empty, so we don't have any delayed requests going
+       to this device */
+    while(!SDLIB_IsQueueEmpty(pBusContext->pCardDetectMsgQueue)) {
+        /* wait for the messages to be handled */
+        DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: _SDIO_UnregisterHostController, waiting on messages\n"));
+        OSSleep(250);
+    }
+
+    /* protect the HCD list */
+    if (!SDIO_SUCCESS((status = SemaphorePendInterruptable(&pBusContext->HcdListSem)))) {
+        goto cleanup;   /* wait interrupted */
+    }
+    ClearBit(&pBusContext->HcdInUseField, pHcd->SlotNumber);
+    /* delete HCD from list  */
+    SDListRemove(&pHcd->SDList);
+    if (!SDIO_SUCCESS((status = SemaphorePost(&pBusContext->HcdListSem)))) {
+        goto cleanup;   /* wait interrupted */
+    }
+        /* cleanup anything we allocated */
+    CleanupHcd(pHcd);
+    DBG_PRINT(SDDBG_TRACE, ("-SDIO Bus Driver: _SDIO_UnregisterHostController\n"));
+    return status;
+cleanup:
+    DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: _SDIO_UnregisterHostController, error 0x%X.\n", status));
+    return status;
+}
+
+/* documentation headers only for Request and Configure */
+/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  @function: The bus driver calls the request callback to start an SDIO bus transaction.
+  @function name: Request
+  @prototype: SDIO_STATUS (*pRequest) (struct _SDHCD *pHcd)
+  @category: HD_Reference
+
+  @input:  pHcd - the host controller structure that was registered
+
+  @output: none
+
+  @return: SDIO_STATUS
+
+  @notes:
+          The bus driver maintains an internal queue of SDREQUEST structures submited by function
+          drivers. The driver should use request macros to obtain a pointer to the current SDREQUEST
+          at the head of the queue.  The driver can access the fields of the current request in order
+          to program hardware appropriately.   Once the request completes, the driver should update
+          the current request information (final status, response bytes and/or data) and call
+          SDIO_HandleHcdEvent() with the event type of EVENT_HCD_TRANSFER_DONE.
+          The bus driver will remove the current request from the head of the queue and start the next
+          request.
+
+  @example: Example of a typical Request callback:
+  SDIO_STATUS HcdRequest(PSDHCD pHcd)
+  {
+    SDIO_STATUS status = SDIO_STATUS_SUCCESS;
+    PSDHCD_DRIVER_CONTEXT pHct = (PSDHCD_DRIVER_CONTEXT)pHcd->pContext;
+    UINT32                temp = 0;
+    PSDREQUEST            pReq;
+       // get the current request
+    pReq = GET_CURRENT_REQUEST(pHcd);
+    DBG_ASSERT(pReq != NULL);
+       // get controller settings based on response type
+    switch (GET_SDREQ_RESP_TYPE(pReq->Flags)) {
+        case SDREQ_FLAGS_NO_RESP:
+            break;
+        case SDREQ_FLAGS_RESP_R1:
+        case SDREQ_FLAGS_RESP_MMC_R4:
+        case SDREQ_FLAGS_RESP_MMC_R5:
+        case SDREQ_FLAGS_RESP_R6:
+        case SDREQ_FLAGS_RESP_SDIO_R5:
+            temp |= CMDDAT_RES_R1_R4_R5;
+            break;
+        case SDREQ_FLAGS_RESP_R1B:
+            temp |= (CMDDAT_RES_R1_R4_R5 | CMDAT_RES_BUSY);
+            break;
+        case SDREQ_FLAGS_RESP_R2:
+            temp |= CMDDAT_RES_R2;
+            break;
+        case SDREQ_FLAGS_RESP_R3:
+        case SDREQ_FLAGS_RESP_SDIO_R4:
+            temp |= CMDDAT_RES_R3;
+            break;
+    }
+        // check for data
+    if (pReq->Flags & SDREQ_FLAGS_DATA_TRANS){
+        temp |= CMDDAT_DATA_EN;
+        // set data remaining count
+        pReq->DataRemaining = pReq->BlockLen * pReq->BlockCount;
+        DBG_PRINT(TRACE_DATA, ("SDIO %s Data Transfer, Blocks:%d, BlockLen:%d, Total:%d \n",
+                    IS_SDREQ_WRITE_DATA(pReq->Flags) ? "TX":"RX",
+                    pReq->BlockCount, pReq->BlockLen, pReq->DataRemaining));
+        if (IS_SDREQ_WRITE_DATA(pReq->Flags)) {
+                // write operation
+        }
+    }
+    // .... program hardware, interrupt handler will complete request
+    return SDIO_STATUS_PENDING;
+  }
+
+  @see also: SDIO_HandleHcdEvent
+
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+
+/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  @function: The bus driver calls the configure callback to set various options
+             and modes in the host controller hardware.
+
+  @function name: Configure
+  @prototype: SDIO_STATUS (*pConfigure) (struct _SDHCD *pHcd, PSDCONFIG pConfig)
+  @category: HD_Reference
+
+  @input:  pHcd - the host controller structure that was registered
+  @input:  pConfig - configuration request structure
+
+  @output: none
+
+  @return: SDIO_STATUS
+
+  @notes:
+          The host controller driver recieves configuration requests for options
+          such as slot voltage, bus width, clock rates and interrupt detection.
+          The bus driver guarantees that only one configuration option request
+          can be issued at a time.
+
+  @example: Example of a typical configure callback:
+  SDIO_STATUS HcdConfig(PSDHCD pHcd, PSDCONFIG pConfig)
+  {
+    SDIO_STATUS status = SDIO_STATUS_SUCCESS;
+    PSDHCD_DRIVER_CONTEXT pHct = (PSDHCD_DRIVER_CONTEXT)pHcd->pContext;
+    UINT16      command;
+        // get command
+    command = GET_SDCONFIG_CMD(pConfig);
+        // decode command
+    switch (command){
+        case SDCONFIG_GET_WP:
+            if (GetGpioPinLevel(pHct,SDIO_CARD_WP_GPIO) == WP_POLARITY) {
+                *((SDCONFIG_WP_VALUE *)pConfig->pData) = 1;
+            } else {
+                *((SDCONFIG_WP_VALUE *)pConfig->pData) = 0;
+            }
+            break;
+        case SDCONFIG_SEND_INIT_CLOCKS:
+            ClockStartStop(pHct,CLOCK_ON);
+                // sleep a little, should be at least 80 clocks at our lowest clock setting
+            status = OSSleep(100);
+            ClockStartStop(pHct,CLOCK_OFF);
+            break;
+        case SDCONFIG_SDIO_INT_CTRL:
+            if (GET_SDCONFIG_CMD_DATA(PSDCONFIG_SDIO_INT_CTRL_DATA,pConfig)->SlotIRQEnable) {
+                // request to enable IRQ detection
+            } else {
+                // request to disable IRQ detectioon
+            }
+            break;
+        case SDCONFIG_SDIO_REARM_INT:
+                // request to re-arm the card IRQ detection logic
+            break;
+        case SDCONFIG_BUS_MODE_CTRL:
+                // request to set bus mode
+            {
+                // get bus mode data structure
+               PSDCONFIG_BUS_MODE_DATA pBusMode =
+                      GET_SDCONFIG_CMD_DATA(PSDCONFIG_SDIO_INT_CTRL_DATA,pConfig);
+                // set bus mode based on settings in bus mode structure
+                // bus mode   :  pBusMode->BusModeFlags
+                // clock rate :  pBusMode->ClockRate
+            }
+            break;
+        case SDCONFIG_POWER_CTRL:
+                // request to set power/voltage
+            {
+                PSDCONFIG_POWER_CTRL_DATA pPowerSetting =
+                       GET_SDCONFIG_CMD_DATA(PSDCONFIG_POWER_CTRL_DATA,pConfig);
+                if (pPowerSetting->SlotPowerEnable) {
+                    // turn on slot power
+                    //
+                } else {
+                    // turn off slot power
+                }
+                DBG_PRINT(PXA_TRACE_CONFIG, ("SDIO PXA255 PwrControl: En:%d, VCC:0x%X \n",
+                      pPowerSetting->SlotPowerEnable,
+                      pPowerSetting->SlotPowerVoltageMask));
+            }
+            break;
+        default:
+            // unsupported
+            status = SDIO_STATUS_INVALID_PARAMETER;
+    }
+    return status;
+ }
+
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+
+
+/*
+ * Allocate a Device instance
+ */
+PSDDEVICE AllocateDevice(PSDHCD pHcd)
+{
+    PSDDEVICE pDevice;
+
+    pDevice = KernelAlloc(sizeof(SDDEVICE));
+    if (pDevice != NULL) {
+        InitDeviceData(pHcd,pDevice);
+    }
+    return pDevice;
+}
+
+
+/*
+ * Free a Device instance
+ */
+void FreeDevice(PSDDEVICE pDevice)
+{
+    DeinitDeviceData(pDevice);
+    KernelFree(pDevice);
+}
+/*
+ * add this device to the list
+ */
+BOOL AddDeviceToList(PSDDEVICE pDevice)
+{
+    BOOL success = FALSE;
+
+    do {
+            /* protect the driver list */
+        if (!SDIO_SUCCESS(SemaphorePendInterruptable(&pBusContext->DeviceListSem))) {
+            break;   /* wait interrupted */
+        }
+
+            /* add new device to the internal list */
+        SDListAdd(&pBusContext->DeviceList , &pDevice->SDList);
+
+        if (!SDIO_SUCCESS(SemaphorePost(&pBusContext->DeviceListSem))) {
+            break;
+        }
+
+        success = TRUE;
+    } while (FALSE);
+
+    return success;
+}
+
+/*
+ *  Delete device associated with the HCD
+ *  if pHCD is NULL this function cleans up all devices, the caller
+ *  better have cleaned up functions first!
+ */
+SDIO_STATUS DeleteDevices(PSDHCD pHcd)
+{
+    SDIO_STATUS status;
+    PSDDEVICE   pDevice;
+    DBG_PRINT(SDDBG_TRACE, ("+SDIO Bus Driver: DeleteDevices hcd:0x%X \n", (INT)pHcd));
+      /* protect the device list */
+    if (!SDIO_SUCCESS((status = SemaphorePendInterruptable(&pBusContext->DeviceListSem)))) {
+        goto cleanup;   /* wait interrupted */
+    }
+    SDITERATE_OVER_LIST_ALLOW_REMOVE(&pBusContext->DeviceList,pDevice,SDDEVICE,SDList) {
+            /* only remove devices for the hcd or if we are cleaning up all */
+        if ((NULL == pHcd) || (pDevice->pHcd == pHcd)) {
+            SDListRemove(&pDevice->SDList);
+            DeinitDeviceData(pDevice);
+            FreeDevice(pDevice);
+        }
+    }SDITERATE_END;
+    if (!SDIO_SUCCESS((status = SemaphorePost(&pBusContext->DeviceListSem)))) {
+        goto cleanup;   /* wait interrupted */
+    }
+    DBG_PRINT(SDDBG_TRACE, ("-SDIO Bus Driver: DeleteDevices \n"));
+    return status;
+cleanup:
+    DBG_PRINT(SDDBG_ERROR, ("-SDIO Bus Driver: DeleteDevice, error exit 0x%X\n", status));
+    return status;
+}
+
+
+static SDIO_STATUS AllocateBusResources(void)
+{
+    INT                 ii;
+    PSDREQUEST          pReq;
+    PSIGNAL_ITEM        pSignal;
+
+    DBG_PRINT(SDDBG_TRACE,
+    ("+SDIO Bus Driver: AllocateBusResources (R:%d,S:%d) (CR:%d,MR:%d)(CS:%d,MS:%d) \n",
+       pBusContext->RequestListSize,
+       pBusContext->SignalSemListSize,
+       pBusContext->CurrentRequestAllocations,pBusContext->MaxRequestAllocations,
+       pBusContext->CurrentSignalAllocations,pBusContext->MaxSignalAllocations));
+
+        /* allocate some initial requests */
+    for (ii = 0; ii < pBusContext->RequestListSize; ii++) {
+        pReq = AllocateRequest();
+        if (pReq == NULL) {
+            break;
+        }
+            /* free requests adds the request to the list */
+        FreeRequest(pReq);
+    }
+
+    for (ii = 0; ii < pBusContext->SignalSemListSize; ii++) {
+        pSignal = AllocateSignal();
+        if (pSignal == NULL) {
+            break;
+        }
+            /* freeing it adds it to the list */
+        FreeSignal(pSignal);
+    }
+
+    DBG_PRINT(SDDBG_TRACE, ("-SDIO Bus Driver: AllocateBusResources\n"));
+    return SDIO_STATUS_SUCCESS;
+}
+
+
+/* cleanup bus resources */
+static void CleanUpBusResources(void)
+{
+    PSDLIST      pItem;
+    PSDREQUEST   pReq;
+    PSIGNAL_ITEM pSignal;
+
+    DBG_PRINT(SDDBG_TRACE, ("+SDIO Bus Driver: CleanUpBusResources (CR:%d,MR:%d)(CS:%d,MS:%d) \n",
+       pBusContext->CurrentRequestAllocations,pBusContext->MaxRequestAllocations,
+       pBusContext->CurrentSignalAllocations,pBusContext->MaxSignalAllocations));
+
+    while(1) {
+        pItem = SDListRemoveItemFromHead(&pBusContext->RequestList);
+        if (NULL == pItem) {
+            break;
+        }
+            /* free the request */
+        pReq = CONTAINING_STRUCT(pItem, SDREQUEST, SDList);
+        if (pReq->InternalFlags & SDBD_ALLOC_IRQ_SAFE_MASK) {
+            KernelFreeIrqSafe(pReq);
+        } else {
+            KernelFree(pReq);
+        }
+        pBusContext->CurrentRequestAllocations--;
+    }
+
+    if (pBusContext->CurrentRequestAllocations != 0) {
+        DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Request allocations are not ZERO! (CR:%d)\n",
+             pBusContext->CurrentRequestAllocations));
+    }
+
+    while(1) {
+        pItem = SDListRemoveItemFromHead(&pBusContext->SignalList);
+        if (NULL == pItem) {
+            break;
+        }
+        pSignal = CONTAINING_STRUCT(pItem, SIGNAL_ITEM, SDList);
+        DestroySignal(pSignal);
+        pBusContext->CurrentSignalAllocations--;
+    }
+
+    if (pBusContext->CurrentSignalAllocations != 0) {
+        DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Signal allocations are not ZERO! (CR:%d)\n",
+             pBusContext->CurrentRequestAllocations));
+    }
+
+    DBG_PRINT(SDDBG_TRACE, ("-SDIO Bus Driver: CleanUpBusResources\n"));
+}
+
+
+/* free a request to the lookaside list */
+void FreeRequest(PSDREQUEST pReq)
+{
+    SDIO_STATUS status;
+    CT_DECLARE_IRQ_SYNC_CONTEXT();
+
+    status = CriticalSectionAcquireSyncIrq(&pBusContext->RequestListCritSection);
+        /* protect request list */
+    if (!SDIO_SUCCESS(status)) {
+        return;
+    }
+
+    if ((pBusContext->CurrentRequestAllocations <= pBusContext->MaxRequestAllocations) ||
+         !(pReq->InternalFlags & SDBD_ALLOC_IRQ_SAFE_MASK)) {
+            /* add it to the list */
+        SDListAdd(&pBusContext->RequestList, &pReq->SDList);
+            /* we will hold onto this one */
+        pReq = NULL;
+    } else {
+            /* decrement count */
+        pBusContext->CurrentRequestAllocations--;
+    }
+
+    status = CriticalSectionReleaseSyncIrq(&pBusContext->RequestListCritSection);
+
+    if (pReq != NULL) {
+        DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: Free Request allocation (CR:%d,MR:%d)\n",
+        pBusContext->CurrentRequestAllocations,pBusContext->MaxRequestAllocations));
+        if (pReq->InternalFlags & SDBD_ALLOC_IRQ_SAFE_MASK) {
+            KernelFreeIrqSafe(pReq);
+        } else {
+                /* we should never free the ones that were normally allocated */
+            DBG_ASSERT(FALSE);
+        }
+    }
+}
+
+/* allocate a request from the lookaside list */
+PSDREQUEST AllocateRequest(void)
+{
+    PSDLIST  pItem;
+    SDIO_STATUS status;
+    PSDREQUEST pReq = NULL;
+    ATOMIC_FLAGS internalflags;
+    CT_DECLARE_IRQ_SYNC_CONTEXT();
+
+
+    status = CriticalSectionAcquireSyncIrq(&pBusContext->RequestListCritSection);
+
+    if (!SDIO_SUCCESS(status)) {
+        return NULL;
+    }
+
+    if (pBusContext->InitMask & RESOURCE_INIT) {
+            /* check the list, we are now running... */
+        pItem = SDListRemoveItemFromHead(&pBusContext->RequestList);
+    } else {
+            /* we are loading the list with requests at initialization */
+        pItem = NULL;
+    }
+    status = CriticalSectionReleaseSyncIrq(&pBusContext->RequestListCritSection);
+
+    if (pItem != NULL) {
+        pReq = CONTAINING_STRUCT(pItem, SDREQUEST, SDList);
+    } else {
+        if (pBusContext->InitMask & RESOURCE_INIT) {
+            DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: Request List empty..allocating new one (irq-safe) (CR:%d,MR:%d)\n",
+            pBusContext->CurrentRequestAllocations,pBusContext->MaxRequestAllocations));
+                /* the resource list was already allocated, we must be running now.
+                 * at run-time, we allocate using the safe IRQ */
+            pReq = (PSDREQUEST)KernelAllocIrqSafe(sizeof(SDREQUEST));
+                /* mark that this one was created using IRQ safe allocation */
+            internalflags = SDBD_ALLOC_IRQ_SAFE_MASK;
+        } else {
+                /* use the normal allocation since we are called at initialization */
+            pReq = (PSDREQUEST)KernelAlloc(sizeof(SDREQUEST));
+            internalflags = 0;
+        }
+
+        if (pReq != NULL) {
+            pReq->InternalFlags = internalflags;
+                /* keep track of allocations */
+            status = CriticalSectionAcquireSyncIrq(&pBusContext->RequestListCritSection);
+            pBusContext->CurrentRequestAllocations++;
+            status = CriticalSectionReleaseSyncIrq(&pBusContext->RequestListCritSection);
+        }
+    }
+
+
+    if (pReq != NULL) {
+            /* preserve internal flags */
+        internalflags = pReq->InternalFlags;
+        ZERO_POBJECT(pReq);
+        pReq->InternalFlags = internalflags;
+    }
+
+    return pReq;
+}
+
+void DestroySignal(PSIGNAL_ITEM pSignal)
+{
+   SignalDelete(&pSignal->Signal);
+   KernelFree(pSignal);
+}
+
+PSIGNAL_ITEM BuildSignal(void)
+{
+    PSIGNAL_ITEM pSignal;
+
+    pSignal = (PSIGNAL_ITEM)KernelAlloc(sizeof(SIGNAL_ITEM));
+    if (pSignal != NULL) {
+            /* initialize signal */
+        if (!SDIO_SUCCESS(SignalInitialize(&pSignal->Signal))) {
+            KernelFree(pSignal);
+            pSignal = NULL;
+        }
+    }
+    return pSignal;
+}
+/* free a signal*/
+void FreeSignal(PSIGNAL_ITEM pSignal)
+{
+    SDIO_STATUS status;
+    CT_DECLARE_IRQ_SYNC_CONTEXT();
+
+    status = CriticalSectionAcquireSyncIrq(&pBusContext->RequestListCritSection);
+
+    if (!SDIO_SUCCESS(status)) {
+        return;
+    }
+
+    if (pBusContext->CurrentSignalAllocations <= pBusContext->MaxSignalAllocations) {
+            /* add it to the list */
+        SDListAdd(&pBusContext->SignalList, &pSignal->SDList);
+            /* flag that we are holding onto it */
+        pSignal = NULL;
+    } else {
+            /* decrement count */
+        pBusContext->CurrentSignalAllocations--;
+    }
+
+    status = CriticalSectionReleaseSyncIrq(&pBusContext->RequestListCritSection);
+
+    if (pSignal != NULL) {
+        DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: Free signal allocation (CS:%d,MS:%d)\n",
+        pBusContext->CurrentSignalAllocations,pBusContext->MaxSignalAllocations));
+        DestroySignal(pSignal);
+    }
+}
+
+/* allocate a signal from the list */
+PSIGNAL_ITEM AllocateSignal(void)
+{
+    PSDLIST         pItem;
+    PSIGNAL_ITEM    pSignal;
+    SDIO_STATUS status;
+    CT_DECLARE_IRQ_SYNC_CONTEXT();
+
+    status = CriticalSectionAcquireSyncIrq(&pBusContext->RequestListCritSection);
+
+    if (!SDIO_SUCCESS(status)) {
+        return NULL;
+    }
+
+    if (pBusContext->InitMask & RESOURCE_INIT) {
+            /* check the list */
+        pItem = SDListRemoveItemFromHead(&pBusContext->SignalList);
+    } else {
+            /* we are loading the list */
+        pItem = NULL;
+    }
+
+    status = CriticalSectionReleaseSyncIrq(&pBusContext->RequestListCritSection);
+    if (pItem != NULL) {
+            /* return the one from the list */
+        pSignal = CONTAINING_STRUCT(pItem, SIGNAL_ITEM, SDList);
+    } else {
+        if (pBusContext->InitMask & RESOURCE_INIT) {
+            DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: Signal List empty..allocating new one (CS:%d,MS:%d)\n",
+            pBusContext->CurrentSignalAllocations,pBusContext->MaxSignalAllocations));
+        }
+            /* just allocate one */
+        pSignal = BuildSignal();
+        status = CriticalSectionAcquireSyncIrq(&pBusContext->RequestListCritSection);
+        if (pSignal != NULL) {
+            pBusContext->CurrentSignalAllocations++;
+        }
+        status = CriticalSectionReleaseSyncIrq(&pBusContext->RequestListCritSection);
+    }
+
+
+    return pSignal;
+}
+
+/*
+ * Issus Bus Request (exposed to function drivers)
+*/
+PSDREQUEST IssueAllocRequest(PSDDEVICE pDev)
+{
+    return AllocateRequest();
+}
+
+/*
+ * Free Request (exposed to function drivers)
+*/
+void IssueFreeRequest(PSDDEVICE pDev, PSDREQUEST pReq)
+{
+    FreeRequest(pReq);
+}
+
+/*
+ * Issus Bus Request (exposed to function drivers)
+*/
+SDIO_STATUS IssueBusRequest(PSDDEVICE pDev, PSDREQUEST pReq)
+{
+    pReq->pFunction = pDev->pFunction;
+    return IssueRequestToHCD(pDev->pHcd,pReq);
+}
+
+
+    /* completion routine for HCD configs, this is synchronized with normal bus requests */
+static void HcdConfigComplete(PSDREQUEST pReq)
+{
+
+    pReq->Status = CALL_HCD_CONFIG((PSDHCD)pReq->pDataBuffer, (PSDCONFIG)pReq->pCompleteContext);
+
+    SignalSet(&((PSIGNAL_ITEM)pReq->pHcdContext)->Signal);
+}
+
+SDIO_STATUS SendSyncedHcdBusConfig(PSDDEVICE pDevice, PSDCONFIG pConfig)
+{
+    SDIO_STATUS     status = SDIO_STATUS_SUCCESS;
+    PSDREQUEST      pReq = NULL;
+    PSIGNAL_ITEM    pSignal = NULL;
+
+    do {
+
+        pSignal = AllocateSignal();
+        if (NULL == pSignal) {
+            status = SDIO_STATUS_NO_RESOURCES;
+            break;
+        }
+
+        pReq = AllocateRequest();
+        if (NULL == pReq) {
+            status = SDIO_STATUS_NO_RESOURCES;
+            break;
+        }
+
+            /* issue pseudo request to sync this with bus requests */
+        pReq->pCompletion = HcdConfigComplete;
+        pReq->pCompleteContext = pConfig;
+            /* re-use hcd context to store the signal since this request
+             * never actually goes to an HCD */
+        pReq->pHcdContext = pSignal;
+        pReq->pDataBuffer = pDevice->pHcd;
+            /* flag this as barrier in case it may change the bus mode of the HCD */
+        pReq->Flags = SDREQ_FLAGS_PSEUDO | SDREQ_FLAGS_BARRIER | SDREQ_FLAGS_TRANS_ASYNC;
+        pReq->Status = SDIO_STATUS_SUCCESS;
+
+            /* issue request */
+        status = IssueRequestToHCD(pDevice->pHcd,pReq);
+
+    } while (FALSE);
+
+    if (SDIO_SUCCESS(status)) {
+        DBG_PRINT(SDIODBG_REQUESTS, ("SDIO Bus Driver: Config Request Sync-Op waiting....\n"));
+        status = SignalWait(&pSignal->Signal);
+
+        if (SDIO_SUCCESS(status)) {
+                /* return the result of the configuration request */
+            status = pReq->Status;
+        }
+    }
+
+        /* cleanup */
+    if (pReq != NULL) {
+        FreeRequest(pReq);
+    }
+
+    if (pSignal != NULL) {
+        FreeSignal(pSignal);
+    }
+
+    return status;
+}
+
+/*
+ * Issus bus Configuration  (exposed to function drivers)
+*/
+SDIO_STATUS IssueBusConfig(PSDDEVICE pDev, PSDCONFIG pConfig)
+{
+    SDIO_STATUS status;
+    INT         cmdLength;
+    UINT8       debugLevel = SDDBG_ERROR;
+
+    cmdLength = GET_SDCONFIG_CMD_LEN(pConfig);
+    status = SDIO_STATUS_INVALID_PARAMETER;
+
+    do {
+            /* check buffers and length */
+        if (IS_SDCONFIG_CMD_GET(pConfig) || IS_SDCONFIG_CMD_PUT(pConfig)) {
+            if ((GET_SDCONFIG_CMD_DATA(PVOID,pConfig) == NULL) || (0 == cmdLength)) {
+                break;
+            }
+        }
+
+        switch (GET_SDCONFIG_CMD(pConfig)) {
+            case SDCONFIG_FUNC_ACK_IRQ:
+                status = SDFunctionAckInterrupt(pDev);
+                break;
+            case SDCONFIG_FUNC_ENABLE_DISABLE:
+                if (cmdLength < sizeof(SDCONFIG_FUNC_ENABLE_DISABLE_DATA)) {
+                    break;
+                }
+                status = SDEnableFunction(pDev,
+                           GET_SDCONFIG_CMD_DATA(PSDCONFIG_FUNC_ENABLE_DISABLE_DATA,pConfig));
+                break;
+            case SDCONFIG_FUNC_UNMASK_IRQ:
+                status = SDMaskUnmaskFunctionIRQ(pDev,FALSE);
+                break;
+            case SDCONFIG_FUNC_MASK_IRQ:
+                status = SDMaskUnmaskFunctionIRQ(pDev,TRUE);
+                break;
+            case SDCONFIG_FUNC_SPI_MODE_DISABLE_CRC:
+                status = SDSPIModeEnableDisableCRC(pDev,FALSE);
+                break;
+            case SDCONFIG_FUNC_SPI_MODE_ENABLE_CRC:
+                status = SDSPIModeEnableDisableCRC(pDev,TRUE);
+                break;
+            case SDCONFIG_FUNC_ALLOC_SLOT_CURRENT:
+                status = SDAllocFreeSlotCurrent(pDev,
+                                                TRUE,
+                                   GET_SDCONFIG_CMD_DATA(PSDCONFIG_FUNC_SLOT_CURRENT_DATA,pConfig));
+                break;
+            case SDCONFIG_FUNC_FREE_SLOT_CURRENT:
+                status = SDAllocFreeSlotCurrent(pDev, FALSE, NULL);
+                break;
+            case SDCONFIG_FUNC_CHANGE_BUS_MODE:
+
+                status = SetOperationalBusMode(pDev,
+                                               GET_SDCONFIG_CMD_DATA(PSDCONFIG_BUS_MODE_DATA,
+                                               pConfig));
+                break;
+            case SDCONFIG_FUNC_NO_IRQ_PEND_CHECK:
+                status = TryNoIrqPendingCheck(pDev);
+                break;
+            default:
+
+                if (GET_SDCONFIG_CMD(pConfig) & SDCONFIG_FLAGS_HC_CONFIG) {
+                        /* synchronize config requests with busrequests */
+                    status = SendSyncedHcdBusConfig(pDev,pConfig);
+                } else {
+                    DBG_PRINT(SDDBG_ERROR,
+                        ("SDIO Bus Driver: IssueBusConfig - unknown command:0x%X \n",
+                        GET_SDCONFIG_CMD(pConfig)));
+                    status = SDIO_STATUS_INVALID_PARAMETER;
+                }
+                break;
+        }
+    } while(FALSE);
+
+    if (!SDIO_SUCCESS(status)) {
+
+           if(status == SDIO_STATUS_FUNC_ENABLE_TIMEOUT ){ /* reduce debug level to avoid timeout error messages */
+                debugLevel = SDDBG_TRACE;
+         }
+
+
+         DBG_PRINT(debugLevel,
+                ("SDIO Bus Driver: IssueBusConfig - Error in command:0x%X, Buffer:0x%X, Length:%d Err:%d\n",
+                GET_SDCONFIG_CMD(pConfig),
+                GET_SDCONFIG_CMD_DATA(INT,pConfig),
+                cmdLength, status));
+    }
+    return status;
+}
+
+/* start a request */
+static INLINE SDIO_STATUS StartHcdRequest(PSDHCD pHcd, PSDREQUEST pReq)
+{
+    SDIO_STATUS status = SDIO_STATUS_SUCCESS;
+    CT_DECLARE_IRQ_SYNC_CONTEXT();
+
+    if ((pReq->pFunction != NULL) && (pReq->pFunction->Flags & SDFUNCTION_FLAG_REMOVING)) {
+        /* this device or function is going away, fail any new requests */
+        DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: StartHcdRequest, fail request 0x%X, device is removing\n", (UINT)pReq));
+        pReq->Status = SDIO_STATUS_CANCELED;
+        return SDIO_STATUS_SDREQ_QUEUE_FAILED;
+    }
+
+    status = _AcquireHcdLock(pHcd);
+
+    if (!SDIO_SUCCESS(status)) {
+        DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Failed to acquire HCD request lock: Err:%d\n", status));
+        pReq->Status = SDIO_STATUS_SDREQ_QUEUE_FAILED;
+        return SDIO_STATUS_SDREQ_QUEUE_FAILED;
+    }
+
+    if (pReq->Flags & SDREQ_FLAGS_QUEUE_HEAD) {
+            /* caller wants this request queued to the head */
+
+            /* a completion routine for a barrier request is called
+             * while the queue is busy.  A barrier request can
+             * insert a new request at the head of the queue */
+        DBG_ASSERT(IsQueueBusy(&pHcd->RequestQueue));
+        QueueRequestToFront(&pHcd->RequestQueue,pReq);
+    } else {
+            /* insert in queue at tail */
+        QueueRequest(&pHcd->RequestQueue,pReq);
+
+            /* is queue busy ? */
+        if (IsQueueBusy(&pHcd->RequestQueue)) {
+                /* release lock */
+            status = _ReleaseHcdLock(pHcd);
+                /* controller is busy already, no need to call the hcd */
+            return SDIO_STATUS_PENDING;
+        }
+            /* mark it as busy */
+        MarkQueueBusy(&pHcd->RequestQueue);
+    }
+
+        /* remove item from head and set current request */
+    SET_CURRENT_REQUEST(pHcd, DequeueRequest(&pHcd->RequestQueue));
+    if (CHECK_API_VERSION_COMPAT(pHcd,2,6)) {
+        CHECK_HCD_RECURSE(pHcd, pHcd->pCurrentRequest);
+    }
+        /* release lock */
+    status = _ReleaseHcdLock(pHcd);
+        /* controller was not busy, call into HCD to process current request */
+    status = CallHcdRequest(pHcd);
+    return status;
+}
+
+
+/* used by CMD12,CMD13 to save the original completion routine */
+#define GET_BD_RSV_REQUEST_COMPLETION(pR)   (PSDEQUEST_COMPLETION)(pR)->pBdRsv1
+#define SET_BD_RSV_REQUEST_COMPLETION(pR,c) (pR)->pBdRsv1 = (PVOID)(c)
+
+/* used by CMD12 processing to save/restore the original data transfer status */
+#define GET_BD_RSV_ORIG_STATUS(pR)          (SDIO_STATUS)(pR)->pBdRsv2
+#define SET_BD_RSV_ORIG_STATUS(pR,s)        (pR)->pBdRsv2 = (PVOID)(s)
+
+/* used by CMD13 processing to get/set polling count */
+#define GET_BD_RSV_STATUS_POLL_COUNT(pR)     (INT)(pR)->pBdRsv2
+#define SET_BD_RSV_STATUS_POLL_COUNT(pR,s)   (pR)->pBdRsv2 = (PVOID)(s)
+
+/* used by CMD55 processing to save the second part of the request */
+#define GET_BD_RSV_ORIG_REQ(pR)             (PSDREQUEST)(pR)->pBdRsv1
+#define SET_BD_RSV_ORIG_REQ(pR,r)           (pR)->pBdRsv1 = (PVOID)(r)
+
+/* used by all to save HCD */
+#define GET_BD_RSV_HCD(pR)                  (PSDHCD)(pR)->pBdRsv3
+#define SET_BD_RSV_HCD(pR,h)                (pR)->pBdRsv3 = (PVOID)(h)
+
+static void CMD13CompletionBarrier(PSDREQUEST pReq);
+
+static INLINE void SetupCMD13(PSDHCD pHcd, PSDREQUEST pReq)
+{
+    pReq->Command = CMD13;
+        /* sequence must be atomic, queue it to the head and flag as a barrier */
+    pReq->Flags = SDREQ_FLAGS_QUEUE_HEAD | SDREQ_FLAGS_BARRIER | SDREQ_FLAGS_TRANS_ASYNC;
+    if (IS_HCD_BUS_MODE_SPI(pHcd)) {
+        pReq->Argument = 0;
+        pReq->Flags |= SDREQ_FLAGS_RESP_R2;
+    } else {
+        pReq->Flags |= SDREQ_FLAGS_RESP_R1;
+        pReq->Argument |= pHcd->CardProperties.RCA << 16;
+    }
+        /* insert completion */
+    pReq->pCompletion = CMD13CompletionBarrier;
+}
+
+/* CMD13 (GET STATUS) completion */
+static void CMD13CompletionBarrier(PSDREQUEST pReq)
+{
+    PSDEQUEST_COMPLETION pOrigCompletion = GET_BD_RSV_REQUEST_COMPLETION(pReq);
+    PSDHCD               pHcd = GET_BD_RSV_HCD(pReq);
+    INT                  pollingCount = GET_BD_RSV_STATUS_POLL_COUNT(pReq);
+    BOOL                 doCompletion = TRUE;
+    UINT32               cardStatus;
+
+    DBG_ASSERT(pOrigCompletion != NULL);
+    DBG_ASSERT(pHcd != NULL);
+    DBG_PRINT(SDIODBG_REQUESTS, ("+SDIO Bus Driver: CMD13CompletionBarrier (cnt:%d) \n",pollingCount));
+
+    do {
+        if (!SDIO_SUCCESS(pReq->Status)) {
+            break;
+        }
+
+        cardStatus = SD_R1_GET_CARD_STATUS(pReq->Response);
+
+        if (cardStatus & SD_CS_TRANSFER_ERRORS) {
+            DBG_PRINT(SDIODBG_REQUESTS,("SDIO Bus Driver: Card transfer errors : 0x%X \n",cardStatus));
+            pReq->Status = SDIO_STATUS_PROGRAM_STATUS_ERROR;
+            break;
+        }
+
+        if (SD_CS_GET_STATE(cardStatus) != SD_CS_STATE_PRG) {
+            DBG_PRINT(SDIODBG_REQUESTS,("SDIO Bus Driver: Card programming done \n"));
+            break;
+        }
+
+        DBG_PRINT(SDIODBG_REQUESTS, ("SDIO Bus Driver: Card still programming.. \n"));
+        pollingCount--;
+
+        if (pollingCount < 0) {
+            pReq->Status = SDIO_STATUS_PROGRAM_TIMEOUT;
+            DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: card programming timeout!\n"));
+            break;
+        }
+
+        doCompletion = FALSE;
+            /* keep trying */
+        SET_BD_RSV_STATUS_POLL_COUNT(pReq, pollingCount);
+        SetupCMD13(pHcd,pReq);
+        DBG_PRINT(SDIODBG_REQUESTS, ("SDIO Bus Driver: re-issuing CMD13 \n"));
+            /* re-issue */
+        IssueRequestToHCD(pHcd, pReq);
+
+    } while (FALSE);
+
+
+    if (doCompletion) {
+            /* restore original completion routine */
+        pReq->pCompletion = pOrigCompletion;
+            /* call original completion routine */
+        pOrigCompletion(pReq);
+    }
+
+    DBG_PRINT(SDIODBG_REQUESTS, ("-SDIO Bus Driver: CMD13CompletionBarrier \n"));
+}
+
+/* command 13 (GET STATUS) preparation */
+static void PrepCMD13Barrier(PSDREQUEST pReq)
+{
+    SDIO_STATUS status = pReq->Status;
+    PSDHCD      pHcd = GET_BD_RSV_HCD(pReq);
+    INT         pollingCount;
+    PSDEQUEST_COMPLETION pOrigCompletion = GET_BD_RSV_REQUEST_COMPLETION(pReq);
+
+    DBG_ASSERT(pHcd != NULL);
+    DBG_ASSERT(pOrigCompletion != NULL);
+
+    DBG_PRINT(SDIODBG_REQUESTS, ("+SDIO Bus Driver: PrepCMD13Barrier \n"));
+
+    if (SDIO_SUCCESS(status)) {
+            /* re-use the request for CMD13 */
+        SetupCMD13(pHcd,pReq);
+            /* set polling count to a multiple of the Block count, if the BlockCount was
+             * zeroed by the HCD, then set it to 1X multiplier */
+        pollingCount = max(pBusContext->CMD13PollingMultiplier,
+                           pBusContext->CMD13PollingMultiplier * (INT)pReq->BlockCount);
+            /* initialize count */
+        SET_BD_RSV_STATUS_POLL_COUNT(pReq, pollingCount);
+            /* re-issue it, we can call IssueRequest here since we are re-using the request */
+        IssueRequestToHCD(pHcd, pReq);
+    } else {
+        DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Request Failure (%d) , CMD13 bypassed.\n",status));
+            /* call the original completion routine */
+        pOrigCompletion(pReq);
+    }
+
+    DBG_PRINT(SDIODBG_REQUESTS, ("-SDIO Bus Driver: PrepCMD13Barrier (%d) \n",status));
+}
+
+/* CMD12 completion */
+static void CMD12Completion(PSDREQUEST pReq)
+{
+    PSDEQUEST_COMPLETION pOrigCompletion = GET_BD_RSV_REQUEST_COMPLETION(pReq);
+
+    DBG_ASSERT(pOrigCompletion != NULL);
+
+    DBG_PRINT(SDIODBG_REQUESTS, ("+SDIO Bus Driver: CMD12Completion \n"));
+
+        /* restore original completion routine */
+    pReq->pCompletion = pOrigCompletion;
+
+    if (SDIO_SUCCESS(pReq->Status)) {
+            /* if CMD12 succeeds, we want to return the result of the original
+             * request */
+        pReq->Status = GET_BD_RSV_ORIG_STATUS(pReq);
+        DBG_PRINT(SDIODBG_REQUESTS,
+                ("SDIO Bus Driver: PrepCMD12Completion original status %d \n",pReq->Status));
+    }
+        /* call original completion routine */
+    pOrigCompletion(pReq);
+
+    DBG_PRINT(SDIODBG_REQUESTS, ("-SDIO Bus Driver: CMD12Completion \n"));
+}
+
+/* CMD12 preparation */
+static void PrepCMD12Barrier(PSDREQUEST pReq)
+{
+
+    SDIO_STATUS status = pReq->Status;
+    PSDHCD               pHcd = GET_BD_RSV_HCD(pReq);
+    PSDEQUEST_COMPLETION pOrigCompletion = GET_BD_RSV_REQUEST_COMPLETION(pReq);
+
+    DBG_ASSERT(pHcd != NULL);
+    DBG_ASSERT(pOrigCompletion != NULL);
+
+    DBG_PRINT(SDIODBG_REQUESTS, ("+SDIO Bus Driver: PrepCMD12Barrier \n"));
+
+    if (SDIO_SUCCESS(status) ||    /* only issue CMD12 on success or specific bus errors */
+        (SDIO_STATUS_BUS_READ_TIMEOUT == status) ||
+        (SDIO_STATUS_BUS_READ_CRC_ERR == status) ||
+        (SDIO_STATUS_BUS_WRITE_ERROR == status)) {
+        if (!CHECK_API_VERSION_COMPAT(pHcd,2,6)) {
+            if (!ForceAllRequestsAsync()) {
+                /* clear the call bit as an optimization, note clearing it wholesale here will
+                 * allow request processing to recurse one more level */
+                AtomicTest_Clear(&pHcd->HcdFlags, HCD_REQUEST_CALL_BIT);
+            }
+        }
+            /* re-use the request for CMD12 */
+        pReq->Command = CMD12;
+        pReq->Argument = 0;
+
+            /* if the data transfer was successful, check for transfer check */
+        if (SDIO_SUCCESS(status) &&
+            (pReq->Flags & SDREQ_FLAGS_AUTO_TRANSFER_STATUS)) {
+                /* original data request requires a transfer status check, which is another
+                 * barrier request */
+            pReq->Flags = SDREQ_FLAGS_RESP_R1B | SDREQ_FLAGS_QUEUE_HEAD | SDREQ_FLAGS_BARRIER |
+                          SDREQ_FLAGS_TRANS_ASYNC;
+            DBG_PRINT(SDIODBG_REQUESTS, ("-SDIO Bus Driver: PrepCMD12Barrier , chaining CMD13 \n"));
+                /* switch out completion to send the CMD13 next */
+            pReq->pCompletion = PrepCMD13Barrier;
+        } else {
+            pReq->Flags = SDREQ_FLAGS_RESP_R1B | SDREQ_FLAGS_QUEUE_HEAD | SDREQ_FLAGS_TRANS_ASYNC;
+            pReq->pCompletion = CMD12Completion;
+        }
+
+            /* save the original data transfer request status */
+        SET_BD_RSV_ORIG_STATUS(pReq,status);
+            /* re-issue it, we can call IssueRequest here since we are re-using the request */
+        IssueRequestToHCD(pHcd, pReq);
+    } else {
+        DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Request Failure (%d) , CMD12 bypassed.\n",status));
+            /* call the original completion routine */
+        pOrigCompletion(pReq);
+    }
+
+    DBG_PRINT(SDIODBG_REQUESTS, ("-SDIO Bus Driver: PrepCMD12Barrier (%d) \n",status));
+}
+
+
+/* CMD55 barrier - this is a special barrier completion routine, we have to submit the second
+ * part of the command command sequence atomically */
+static void CMD55CompletionBarrier(PSDREQUEST pReq)
+{
+    SDIO_STATUS status = pReq->Status;
+    PSDREQUEST  pOrigReq = GET_BD_RSV_ORIG_REQ(pReq);
+    PSDHCD      pHcd = GET_BD_RSV_HCD(pReq);
+    BOOL        doCompletion = FALSE;
+
+    DBG_ASSERT(pOrigReq != NULL);
+    DBG_ASSERT(pHcd != NULL);
+
+    DBG_PRINT(SDIODBG_REQUESTS, ("+SDIO Bus Driver: CMD55Completion \n"));
+
+    do {
+
+        if (!SDIO_SUCCESS(status)) {
+                /* command 55 failed */
+            pOrigReq->Status = status;
+            doCompletion = TRUE;
+            break;
+        }
+
+        if (!(SD_R1_GET_CARD_STATUS(pReq->Response) & SD_CS_APP_CMD)) {
+            DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Card is not accepting CMD55, status:0x%X \n",
+                    SD_R1_GET_CARD_STATUS(pReq->Response)));
+            pOrigReq->Status = SDIO_STATUS_INVALID_COMMAND;
+            doCompletion = TRUE;
+            break;
+        }
+
+        if (!CHECK_API_VERSION_COMPAT(pHcd,2,6)) {
+            if (!ForceAllRequestsAsync()) {
+                AtomicTest_Clear(&pHcd->HcdFlags, HCD_REQUEST_CALL_BIT);
+            }
+        }
+
+            /* flag the original request to queue to the head */
+        pOrigReq->Flags |= SDREQ_FLAGS_QUEUE_HEAD;
+            /* submit original request, we cannot call IssueRequestHCD() here because the
+             * original request has already gone through IssueRequestHCD() already */
+        status = StartHcdRequest(pHcd, pOrigReq);
+
+        if (SDIO_STATUS_PENDING == status) {
+            break;
+        }
+
+        pOrigReq->Status = status;
+
+        if (SDIO_STATUS_SDREQ_QUEUE_FAILED == status) {
+                /* never made it to the queue */
+            doCompletion = TRUE;
+            break;
+        }
+
+            /* request completed in-line */
+        _SDIO_HandleHcdEvent(pHcd, EVENT_HCD_TRANSFER_DONE);
+
+    } while (FALSE);
+
+    if (doCompletion) {
+        DoRequestCompletion(pOrigReq, pHcd);
+    }
+
+        /* free the CMD55 request */
+    FreeRequest(pReq);
+
+    DBG_PRINT(SDIODBG_REQUESTS, ("-SDIO Bus Driver: CMD55Completion \n"));
+}
+
+
+/* synch completion routine */
+static void SynchCompletion(PSDREQUEST pRequest)
+{
+    PSIGNAL_ITEM pSignal;
+
+    pSignal = (PSIGNAL_ITEM)pRequest->pCompleteContext;
+    DBG_ASSERT(pSignal != NULL);
+    if (!SDIO_SUCCESS(SignalSet(&pSignal->Signal))) {
+        DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: SynchCompletion - signal failed \n"));
+    }
+
+}
+
+/*
+ * Issue a request to the host controller
+ *
+ *
+ * The following flags are handled internally by the bus driver to guarantee atomicity.
+ *
+ *    SDREQ_FLAGS_APP_CMD - SD Extended commands requiring CMD55 to precede the actual command
+ *    SDREQ_FLAGS_AUTO_CMD12 - Memory Card Data transfer needs CMD12 to stop transfer
+ *                             (multi-block reads/writes)
+ *    SDREQ_FLAGS_AUTO_TRANSFER_STATUS - Memory card data transfer needs transfer status polling
+ *                                       using CMD13
+ *
+ *    These request flags require additional commands prepended or appended to the original command
+ *
+ *    The order of command execution :
+ *
+ *    Order  Condition                 Command Issued
+ *    -------------------------------------------------------------
+ *      1.   If APP_CMD                CMD55 issued.
+ *      2.   Always                    Caller command issued.
+ *      3.   If AUTO_CMD12             CMD12 issued.
+ *      4.   If AUTO_TRANSFER_STATUS   CMD13 issued until card programming is complete
+*/
+SDIO_STATUS IssueRequestToHCD(PSDHCD pHcd, PSDREQUEST pReq)
+{
+    SDIO_STATUS     status = SDIO_STATUS_SUCCESS;
+    PSIGNAL_ITEM    pSignal = NULL;
+    BOOL            handleFailedReqSubmit = FALSE;
+
+    CLEAR_INTERNAL_REQ_FLAGS(pReq);
+
+    do {
+            /* mark request in-use */
+        ATOMIC_FLAGS internal = AtomicTest_Set(&pReq->InternalFlags, SDBD_PENDING);
+        if (internal & (1<<SDBD_PENDING)) {
+            DBG_ASSERT_WITH_MSG(FALSE,
+                            "SDIO Bus Driver: IssueRequestToHCD - request already in use \n");
+            DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Request already in use: 0x%X",(INT)pReq));
+        }
+
+        if (!(pReq->Flags & SDREQ_FLAGS_TRANS_ASYNC)) {
+                /* caller wants synchronous operation, insert our completion routine */
+            pReq->pCompletion = SynchCompletion;
+            pSignal = AllocateSignal();
+            if (NULL == pSignal) {
+                status = SDIO_STATUS_NO_RESOURCES;
+                pReq->Status = SDIO_STATUS_NO_RESOURCES;
+                handleFailedReqSubmit = TRUE;
+                    /* no need to continue */
+                break;
+            }
+            pReq->pCompleteContext = (PVOID)pSignal;
+        }
+
+        if ((pReq->Flags & SDREQ_FLAGS_AUTO_CMD12) &&
+            !(pHcd->Attributes & SDHCD_ATTRIB_AUTO_CMD12) &&
+            !(IS_HCD_BUS_MODE_SPI(pHcd) && IS_SDREQ_WRITE_DATA(pReq->Flags))) {
+            DBG_PRINT(SDIODBG_REQUESTS, ("SDIO Bus Driver: Auto CMD12 on Request:0x%08X \n",(INT)pReq));
+                /* caller wants CMD12 auto-issued and the HCD does not support it */
+                /* setup caller's request as a barrier and replace their completion routine */
+            pReq->Flags |= SDREQ_FLAGS_BARRIER;
+                /* take off the flag, since the BD will be issuing it */
+            pReq->Flags &= ~SDREQ_FLAGS_AUTO_CMD12;
+                /* save original completion */
+            SET_BD_RSV_REQUEST_COMPLETION(pReq,pReq->pCompletion);
+                /* save the HCD we are on */
+            SET_BD_RSV_HCD(pReq,pHcd);
+                /* use completion for preping CMD12 */
+            pReq->pCompletion = PrepCMD12Barrier;
+        }
+
+        if (pReq->Flags & SDREQ_FLAGS_AUTO_TRANSFER_STATUS) {
+            /* caller wants transfer status checked. If a CMD12
+             * barrier request has been setup we let the CMD12 completion take care
+             * of setting up the transfer check */
+            if (pReq->pCompletion != PrepCMD12Barrier) {
+                    /* make CMD13 prep a barrier */
+                pReq->Flags |= SDREQ_FLAGS_BARRIER;
+                    /* save original completion */
+                SET_BD_RSV_REQUEST_COMPLETION(pReq,pReq->pCompletion);
+                    /* save the HCD we are on */
+                SET_BD_RSV_HCD(pReq,pHcd);
+                    /* use completion for preping CMD13 */
+                pReq->pCompletion = PrepCMD13Barrier;
+            }
+        }
+
+            /* check app command, the two command sequence must be handled atomically */
+        if (pReq->Flags & SDREQ_FLAGS_APP_CMD) {
+            PSDREQUEST      pCmd55;
+                /* allocate request to handle initial CMD55 command */
+            pCmd55 = AllocateRequest();
+            if (NULL == pCmd55) {
+                status = SDIO_STATUS_NO_RESOURCES;
+                pReq->Status = SDIO_STATUS_NO_RESOURCES;
+                    /* complete the caller's request with error */
+                handleFailedReqSubmit = TRUE;
+                    /* no need to continue */
+                break;
+            }
+                /* first submit CMD55 */
+                /* set RCA */
+            pCmd55->Argument = pHcd->CardProperties.RCA << 16;
+                /* mark as a barrier request */
+            pCmd55->Flags = SDREQ_FLAGS_RESP_R1 | SDREQ_FLAGS_BARRIER | SDREQ_FLAGS_TRANS_ASYNC;
+            pCmd55->Command = CMD55;
+                /* call our barrier completion routine when done */
+            pCmd55->pCompletion = CMD55CompletionBarrier;
+                /* save request and target HCD */
+            SET_BD_RSV_ORIG_REQ(pCmd55,pReq);
+            SET_BD_RSV_HCD(pCmd55,pHcd);
+                /* recursively start the CMD55 request, since the CMD55 is a barrier
+                 * request, it's completion routine will submit the actual request
+                 * atomically */
+            status = IssueRequestToHCD(pHcd, pCmd55);
+
+        } else {
+                /* start the normal request */
+            status = StartHcdRequest(pHcd,pReq);
+        }
+
+
+        if (SDIO_STATUS_SDREQ_QUEUE_FAILED == status) {
+            handleFailedReqSubmit = TRUE;
+                /* no need to continue, clean up at the end */
+            break;
+        }
+
+            /* at this point, the request was either queued or was processed by the
+             * HCD */
+
+        DBG_PRINT(SDIODBG_REQUESTS, ("SDIO Bus Driver: HCD returned status:%d on request: 0x%X, (CMD:%d) \n",
+                  status, (INT)pReq, pReq->Command));
+
+        if (status != SDIO_STATUS_PENDING) {
+            /* the HCD completed the request within the HCD request callback,
+             * check and see if this is a synchronous request */
+            if (pSignal != NULL) {
+                    /* it was synchronous */
+                DBG_PRINT(SDIODBG_REQUESTS, ("SDIO Bus Driver: Sync-Op signal wait bypassed \n"));
+                    /* NULL out completion info, there's no need to
+                     * signal the semaphore */
+                pReq->pCompletion = NULL;
+
+            } else {
+                DBG_PRINT(SDIODBG_REQUESTS, ("SDIO Bus Driver: Async operation completed in-line \n"));
+                    /* this was an async call, always return pending */
+                status = SDIO_STATUS_PENDING;
+            }
+                /* process this completed transfer on behalf of the HCD */
+            _SDIO_HandleHcdEvent(pHcd, EVENT_HCD_TRANSFER_DONE);
+
+                /* done processing */
+            break;
+        }
+                /* I/O is now pending, could be sync or async */
+                /* check for synch op */
+        if (pSignal != NULL) {
+                /* wait for completion */
+            DBG_PRINT(SDIODBG_REQUESTS, ("SDIO Bus Driver: Sync-Op signal waiting....\n"));
+                /* this is not interruptable, as the HCD must complete it. */
+            status = SignalWait(&pSignal->Signal);
+                /* don't need the signal anymore */
+            FreeSignal(pSignal);
+            pSignal = NULL;
+
+            /* note: it is safe to touch pReq since we own
+             * the completion routine for synch transfers */
+
+                /* check signal wait status */
+            if (!SDIO_SUCCESS(status)) {
+                DBG_PRINT(SDDBG_TRACE,
+                ("SDIO Bus Driver - IssueRequestToHCD: Synch transfer - signal wait failed, cancelling req 0X%X\n",
+                (UINT)pReq));
+                pReq->Status = SDIO_STATUS_CANCELED;
+                status = SDIO_STATUS_CANCELED;
+                break;
+            }
+            DBG_PRINT(SDIODBG_REQUESTS, ("SDIO Bus Driver: Sync-Op woke up\n"));
+                /* return the completion status of the request */
+            status = pReq->Status;
+        } else {
+            DBG_PRINT(SDIODBG_REQUESTS, ("SDIO Bus Driver: Async operation Pending \n"));
+        }
+
+    } while (FALSE);
+
+        /* see if we need to clean up failed submissions */
+    if (handleFailedReqSubmit) {
+            /* make sure this is cleared */
+        AtomicTest_Clear(&pReq->InternalFlags, SDBD_PENDING);
+            /* the  request processing failed before it was submitted to the HCD */
+            /* note: since it never made it to the queue we can touch pReq */
+        if (pReq->Flags & SDREQ_FLAGS_TRANS_ASYNC) {
+            /* for ASYNC requests, we need to call the completion routine */
+            DoRequestCompletion(pReq, pHcd);
+                /* return pending for all ASYNC requests */
+            status = SDIO_STATUS_PENDING;
+        }
+    }
+
+        /* check if we need to clean up the signal */
+    if (pSignal != NULL) {
+            /* make sure this is freed */
+        FreeSignal(pSignal);
+    }
+        /* return status */
+    return status;
+}
+
+/* documentation for configuration requests */
+/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  @function: Enable or Disable the SDIO Function
+
+  @function name: SDCONFIG_FUNC_ENABLE_DISABLE
+  @prototype: SDCONFIG_FUNC_ENABLE_DISABLE
+  @category: PD_Reference
+
+  @input:  SDCONFIG_FUNC_ENABLE_DISABLE_DATA - Enable Data structure
+
+  @output: none
+
+  @return: SDIO Status
+
+  @notes: This command code is used in the SDLIB_IssueConfig() API.  The command
+          uses the SDCONFIG_FUNC_ENABLE_DISABLE_DATA structure.  The caller must set the
+          EnableFlags and specify the TimeOut value in milliseconds.   The TimeOut
+          value is used for polling the I/O ready bit.  This command returns a status
+          of SDIO_STATUS_FUNC_ENABLE_TIMEOUT if the ready bit was not set/cleared
+          by the card within the timeout period.
+
+  @example: Example of enabling an I/O function:
+        fData.EnableFlags = SDCONFIG_ENABLE_FUNC;
+        fData.TimeOut = 500;
+        status = SDLIB_IssueConfig(pInstance->pDevice,
+                                   SDCONFIG_FUNC_ENABLE_DISABLE,
+                                   &fData,
+                                   sizeof(fData));
+
+  @see also: SDLIB_IssueConfig
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+
+
+/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  @function: Unmask the function's IRQ
+
+  @function name: SDCONFIG_FUNC_UNMASK_IRQ
+  @prototype: SDCONFIG_FUNC_UNMASK_IRQ
+  @category: PD_Reference
+
+  @input:  none
+
+  @output: none
+
+  @return: SDIO Status
+
+  @notes: This command code is used in the SDLIB_IssueConfig() API.  The command
+          unmasks the IRQ for the I/O function. This request sets the function's
+          interrupt enable bit in the INTENABLE register in the
+          common register space.
+
+  @example: Example of unmasking interrupt :
+        status = SDLIB_IssueConfig(pInstance->pDevice,
+                                   SDCONFIG_FUNC_UNMASK_IRQ,
+                                   NULL,
+                                   0);
+
+  @see also: SDCONFIG_FUNC_MASK_IRQ
+  @see also: SDLIB_IssueConfig
+
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+
+/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  @function: Mask the function's IRQ
+
+  @function name: SDCONFIG_FUNC_MASK_IRQ
+  @prototype: SDCONFIG_FUNC_MASK_IRQ
+  @category: PD_Reference
+
+  @input:  none
+
+  @output: none
+
+  @return: SDIO Status
+
+  @notes: This command code is used in the SDLIB_IssueConfig() API.  The command
+          masks the IRQ for the I/O function.
+
+  @example: Example of unmasking interrupt :
+        status = SDLIB_IssueConfig(pInstance->pDevice,
+                                   SDCONFIG_FUNC_MASK_IRQ,
+                                   NULL,
+                                   0);
+
+  @see also: SDCONFIG_FUNC_UNMASK_IRQ
+  @see also: SDLIB_IssueConfig
+
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+
+/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  @function: Acknowledge that the function's IRQ has been handled
+
+  @function name: SDCONFIG_FUNC_ACK_IRQ
+  @prototype: SDCONFIG_FUNC_ACK_IRQ
+  @category: PD_Reference
+
+  @input:  none
+
+  @output: none
+
+  @return: SDIO Status
+
+  @notes: This command code is used in the SDLIB_IssueConfig() API.  The command
+          indicates to the bus driver that the function driver has handled the
+          interrupt.  The bus driver will notify the host controller to unmask the
+          interrupt source.  SDIO interrupts are level triggered and are masked at the
+          host controller level until all function drivers have indicated that they
+          have handled their respective interrupt. This command can be issued in either
+          the IRQ handler or asynchronous IRQ handler.
+
+  @example: Example of acknowledging an interrupt :
+        status = SDLIB_IssueConfig(pInstance->pDevice,
+                                   SDCONFIG_FUNC_ACK_IRQ,
+                                   NULL,
+                                   0);
+
+  @see also: SDLIB_IssueConfig
+
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+
+/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  @function: Disable SD/MMC/SDIO card CRC checking.
+
+  @function name: SDCONFIG_FUNC_SPI_MODE_DISABLE_CRC
+  @prototype: SDCONFIG_FUNC_SPI_MODE_DISABLE_CRC
+  @category: PD_Reference
+
+  @input:  none
+
+  @output: none
+
+  @return: SDIO Status
+
+  @notes: This command code is used in the SDLIB_IssueConfig() API.  The command
+          issues CMD59 to disable SPI-CRC checking and requests the host controller
+          driver to stop checking the CRC. This is typically used in systems where
+          CRC checking is not required and performance is improved if the CRC checking
+          is ommitted (i.e. SPI implementations without hardware CRC support).
+
+  @example: Example of disabling SPI CRC checking:
+        status = SDLIB_IssueConfig(pInstance->pDevice,
+                                   SDCONFIG_FUNC_SPI_MODE_DISABLE_CRC,
+                                   NULL,
+                                   0);
+
+  @see also: SDCONFIG_FUNC_SPI_MODE_ENABLE_CRC
+  @see also: SDLIB_IssueConfig
+
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+
+/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  @function: Enable SD/MMC/SDIO card CRC checking.
+
+  @function name: SDCONFIG_FUNC_SPI_MODE_ENABLE_CRC
+  @prototype: SDCONFIG_FUNC_SPI_MODE_ENABLE_CRC
+  @category: PD_Reference
+
+  @input:  none
+
+  @output: none
+
+  @return: SDIO Status
+
+  @notes: This command code is used in the SDLIB_IssueConfig() API.  The command
+          issues CMD59 to enable SPI-CRC checking and requests the host controller
+          driver to generate valid CRCs for commands and data as well as
+          check the CRC in responses and incomming data blocks.
+
+  @example: Example of enabling SPI CRC checking:
+        status = SDLIB_IssueConfig(pInstance->pDevice,
+                                   SDCONFIG_FUNC_SPI_MODE_ENABLE_CRC,
+                                   NULL,
+                                   0);
+
+  @see also: SDCONFIG_FUNC_SPI_MODE_DISABLE_CRC
+  @see also: SDLIB_IssueConfig
+
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+
+/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  @function: Allocate slot current for a card function.
+
+  @function name: SDCONFIG_FUNC_ALLOC_SLOT_CURRENT
+  @prototype: SDCONFIG_FUNC_ALLOC_SLOT_CURRENT
+  @category: PD_Reference
+
+  @input:  SDCONFIG_FUNC_SLOT_CURRENT_DATA
+
+  @output: SDCONFIG_FUNC_SLOT_CURRENT_DATA
+
+  @return: SDIO Status
+
+  @notes: This command code is used in the SDLIB_IssueConfig() API.  The command
+          requests an allocation of slot current to satisfy the power requirements
+          of the function.  The command uses the SDCONFIG_FUNC_SLOT_CURRENT_DATA
+          data structure to pass the required current in mA. Slot current allocation
+          is not cummulative and this command should only be issued once by each function
+          driver with the worse case slot current usage.
+          The command returns SDIO_STATUS_NO_RESOURCES if the
+          requirement cannot be met by the host hardware.  The SlotCurrent field will
+          contain the remaining current available to the slot.  The slot current should
+          be allocated before the function is enabled using SDCONFIG_FUNC_ENABLE_DISABLE.
+          When a function driver is unloaded it should free the slot current allocation
+          by using the SDCONFIG_FUNC_FREE_SLOT_CURRENT command.
+
+  @example: Example of allocating slot current:
+        slotCurrent.SlotCurrent = 150;  // 150 mA
+        status = SDLIB_IssueConfig(pInstance->pDevice,
+                                   SDCONFIG_FUNC_ALLOC_SLOT_CURRENT,
+                                   &slotCurrent,
+                                   sizeof(slotCurrent));
+
+
+  @see also: SDCONFIG_FUNC_FREE_SLOT_CURRENT
+  @see also: SDLIB_IssueConfig
+
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+
+/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  @function: Free slot current for a card function.
+
+  @function name: SDCONFIG_FUNC_FREE_SLOT_CURRENT
+  @prototype: SDCONFIG_FUNC_FREE_SLOT_CURRENT
+  @category: PD_Reference
+
+  @input:  none
+
+  @output: none
+
+  @return: SDIO Status
+
+  @notes: This command code is used in the SDLIB_IssueConfig() API.  The command
+          frees the allocated current for a card function.  This command should be
+          issued only once (per function) and only after an allocation was successfully made.
+
+  @example: Example of freeing slot current:
+        status = SDLIB_IssueConfig(pInstance->pDevice,
+                                   SDCONFIG_FUNC_FREE_SLOT_CURRENT,
+                                   NULL,
+                                   0);
+
+  @see also: SDCONFIG_FUNC_ALLOC_SLOT_CURRENT
+  @see also: SDLIB_IssueConfig
+
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+
+/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  @function: Set the bus mode for the SD/SDIO card.
+
+  @function name: SDCONFIG_FUNC_CHANGE_BUS_MODE
+  @prototype: SDCONFIG_FUNC_CHANGE_BUS_MODE
+  @category: PD_Reference
+
+  @input:  none
+
+  @output: none
+
+  @return: SDIO Status
+
+  @notes:     This command code is used in the SDLIB_IssueConfig() API.  The command
+          alters the card's bus mode (width and clock rate) to a driver specified
+          value.  The driver must read the current bus mode flags, modify if necessary
+          and pass the value in the SDCONFIG_BUS_MODE_DATA structure.
+              If the bus width is changed (1 or 4 bit) the caller must adjust the mode flags
+          for the new width. Cards cannot be switched between 1/4 bit and SPI mode.
+          Switching to or from SPI mode requires a power cycle. Adjustments to the clock
+          rate is immediate on the next bus transaction.  The actual clock rate value is
+          limited by the host controller and is reported in the ClockRate field when the
+          command completes successfully.
+              The bus mode change is card wide and may affect other SDIO functions on
+          multi-function cards. Use this feature with caution. This feature should NOT be
+          used to dynamically control clock rates during runtime and should only be used
+          at card initialization. Changing the bus mode must be done with SDIO function
+          interrupts masked.
+              This request can block and must only be called from a schedulable context.
+
+  @example: Example of changing the clock rate:
+    SDCONFIG_BUS_MODE_DATA  busSettings;
+    ZERO_OBJECT(busSettings);
+       // get current bus flags and keep the same bus width
+    busSettings.BusModeFlags = SDDEVICE_GET_BUSMODE_FLAGS(pInstance->pDevice);
+    busSettings.ClockRate = 8000000;  // adjust clock to 8 Mhz
+       // issue config request to override clock rate
+    status = SDLIB_IssueConfig(pInstance->pDevice,
+                               SDCONFIG_FUNC_CHANGE_BUS_MODE,
+                               &busSettings,
+                               sizeof(SDCONFIG_BUS_MODE_DATA));
+
+  @see also: SDDEVICE_GET_BUSMODE_FLAGS
+  @see also: SDLIB_IssueConfig
+
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+
+/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  @function: Get the debug level of the underlying host controller driver.
+
+  @function name: SDCONFIG_GET_HCD_DEBUG
+  @prototype: SDCONFIG_GET_HCD_DEBUG
+  @category: PD_Reference
+
+  @input:  none
+
+  @output: CT_DEBUG_LEVEL
+
+  @return: SDIO Status
+
+  @notes: This command code is used in the SDLIB_IssueConfig() API.  The command
+          requests the current debug level of the HCD driver.  This API is useful for
+          saving the current debug level of the HCD prior to issuing SDCONFIG_SET_HCD_DEBUG
+          in order to increase the verbosity of the HCD. This API should be used only for
+          debugging purposes.  If multiple functions attempt to save and set the HCD debug
+          level simultanously, the final debug level will be unknown. Not all HCDs support
+          this command.
+
+  @example: Example of saving the debug level:
+        CT_DEBUG_LEVEL savedDebug;
+        status = SDLIB_IssueConfig(pInstance->pDevice,
+                                   SDCONFIG_GET_HCD_DEBUG,
+                                   &savedDebug,
+                                   sizeof(savedDebug));
+
+  @see also: SDCONFIG_SET_HCD_DEBUG
+  @see also: SDLIB_IssueConfig
+
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+
+/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  @function: Set the debug level of the underlying host controller driver.
+
+  @function name: SDCONFIG_SET_HCD_DEBUG
+  @prototype: SDCONFIG_SET_HCD_DEBUG
+  @category: PD_Reference
+
+  @input:  CT_DEBUG_LEVEL
+
+  @output: none
+
+  @return: SDIO Status
+
+  @notes: This command code is used in the SDLIB_IssueConfig() API.  The command
+          sets the current debug level of the HCD driver.  This API is useful for
+          setting the debug level of the HCD programatically for debugging purposes.
+          If multiple functions attempt to save and set the HCD debug
+          level simultanously, the final debug level will be unknown. Not all HCDs support
+          this request.
+
+  @example: Example of setting the debug level:
+        CT_DEBUG_LEVEL setDebug = 15;
+        status = SDLIB_IssueConfig(pInstance->pDevice,
+                                   SDCONFIG_GET_HCD_DEBUG,
+                                   &setDebug,
+                                   sizeof(setDebug));
+
+  @see also: SDCONFIG_GET_HCD_DEBUG
+  @see also: SDLIB_IssueConfig
+
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+
+/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  @function: Instruct the bus driver to not check the SDIO card interrupt pending
+             register on card interrupts, if possible.
+
+  @function name: SDCONFIG_FUNC_NO_IRQ_PEND_CHECK
+  @prototype: SDCONFIG_FUNC_NO_IRQ_PEND_CHECK
+  @category: PD_Reference
+
+  @input:  none
+
+  @output: none
+
+  @return: SDIO Status
+
+  @notes: This command code is used in the SDLIB_IssueConfig() API.  The command instructs the
+          bus driver to skip checking the card interrupt pending register on each card
+          interrupt.  The bus driver will assume the function is interrupting and immediately start
+          the interrupt processing stage. This option is only valid for single function cards.
+          The bus driver will reject the command for a card with more than 1 function.
+          For single function cards, this can improve interrupt response time.
+
+  @example: Example of skipping IRQ pending checks:
+
+        status = SDLIB_IssueConfig(pInstance->pDevice,
+                                   SDCONFIG_FUNC_NO_IRQ_PEND_CHECK,
+                                   NULL,
+                                   0);
+
+  @see also: SDLIB_IssueConfig
+
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
diff --git a/drivers/sdio/stack/busdriver/sdio_bus_events.c b/drivers/sdio/stack/busdriver/sdio_bus_events.c
new file mode 100644
index 00000000000..5b3148d6752
--- /dev/null
+++ b/drivers/sdio/stack/busdriver/sdio_bus_events.c
@@ -0,0 +1,1040 @@
+/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+@file: sdio_bus_events.c
+
+@abstract: OS independent bus driver support
+
+#notes: this file contains various event handlers and helpers
+
+@notice: Copyright (c), 2004-2006 Atheros Communications, Inc.
+
+
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 as
+ *  published by the Free Software Foundation;
+ *
+ *  Software distributed under the License is distributed on an "AS
+ *  IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+ *  implied. See the License for the specific language governing
+ *  rights and limitations under the License.
+ *
+ *  Portions of this code were developed with information supplied from the
+ *  SD Card Association Simplified Specifications. The following conditions and disclaimers may apply:
+ *
+ *   The following conditions apply to the release of the SD simplified specification (�Simplified
+ *   Specification�) by the SD Card Association. The Simplified Specification is a subset of the complete
+ *   SD Specification which is owned by the SD Card Association. This Simplified Specification is provided
+ *   on a non-confidential basis subject to the disclaimers below. Any implementation of the Simplified
+ *   Specification may require a license from the SD Card Association or other third parties.
+ *   Disclaimers:
+ *   The information contained in the Simplified Specification is presented only as a standard
+ *   specification for SD Cards and SD Host/Ancillary products and is provided "AS-IS" without any
+ *   representations or warranties of any kind. No responsibility is assumed by the SD Card Association for
+ *   any damages, any infringements of patents or other right of the SD Card Association or any third
+ *   parties, which may result from its use. No license is granted by implication, estoppel or otherwise
+ *   under any patent or other rights of the SD Card Association or any third party. Nothing herein shall
+ *   be construed as an obligation by the SD Card Association to disclose or distribute any technical
+ *   information, know-how or other confidential information to any third party.
+ *
+ *
+ *  The initial developers of the original code are Seung Yi and Paul Lever
+ *
+ *  sdio@atheros.com
+ *
+ *
+
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+#define MODULE_NAME  SDBUSDRIVER
+#include <linux/sdio/ctsystem.h>
+#include <linux/sdio/sdio_busdriver.h>
+#include <linux/sdio/sdio_lib.h>
+#include "_busdriver.h"
+#include <linux/sdio/_sdio_defs.h>
+#include <linux/sdio/mmc_defs.h>
+
+static SDIO_STATUS ScanSlotForCard(PSDHCD pHcd,
+                                   PBOOL  pCardPresent);
+static void GetPendingIrqComplete(PSDREQUEST pReq);
+static void ProcessPendingIrqs(PSDHCD  pHcd, UINT8 IntPendingMsk);
+
+/*
+ * DeviceDetach - tell core a device was removed from a slot
+*/
+SDIO_STATUS DeviceDetach(PSDHCD pHcd)
+{
+    SDCONFIG_SDIO_INT_CTRL_DATA irqData;
+
+    ZERO_OBJECT(irqData);
+
+    DBG_PRINT(SDDBG_TRACE, ("+SDIO Bus Driver: DeviceDetach\n"));
+        /* tell any function drivers we are gone */
+    RemoveHcdFunctions(pHcd);
+        /* delete the devices associated with this HCD */
+    DeleteDevices(pHcd);
+        /* check and see if there are any IRQs that were left enabled */
+    if (pHcd->IrqsEnabled) {
+        irqData.SlotIRQEnable = FALSE;
+            /* turn off IRQ detection in HCD */
+        _IssueConfig(pHcd,SDCONFIG_SDIO_INT_CTRL,(PVOID)&irqData, sizeof(irqData));
+    }
+
+        /* reset hcd state */
+    ResetHcdState(pHcd);
+
+    DBG_PRINT(SDDBG_TRACE, ("-SDIO Bus Driver: DeviceDetach\n"));
+    return SDIO_STATUS_SUCCESS;
+}
+
+/*
+ * DeviceAttach - tell core a device was inserted into a slot
+*/
+SDIO_STATUS DeviceAttach(PSDHCD pHcd)
+{
+    SDIO_STATUS status = SDIO_STATUS_SUCCESS;
+    PSDDEVICE pDevice = NULL;
+    UINT      ii;
+
+
+    if (IS_CARD_PRESENT(pHcd)) {
+        DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: DeviceAttach called on occupied slot!\n"));
+        return SDIO_STATUS_ERROR;
+    }
+
+    DBG_PRINT(SDDBG_TRACE, ("+SDIO Bus Driver: DeviceAttach bdctxt:0x%X \n", (UINT32)pBusContext));
+
+    if (IS_HCD_RAW(pHcd)) {
+         DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: RAW HCD (%s) device attach \n",pHcd->pName));
+            /* this is a raw HCD */
+        memset(&pHcd->CardProperties,0,sizeof(pHcd->CardProperties));
+        pHcd->CardProperties.Flags = CARD_RAW;
+        pHcd->CardProperties.IOFnCount = 0;
+          /* for raw HCD, set up minimum parameters
+           * since we cannot determine these values using any standard, use values
+           * reported by the HCD */
+            /* the operational rate is just the max clock rate reported */
+        pHcd->CardProperties.OperBusClock =  pHcd->MaxClockRate;
+            /* the max bytes per data transfer is just the max bytes per block */
+        pHcd->CardProperties.OperBlockLenLimit = pHcd->MaxBytesPerBlock;
+            /* if the raw HCD uses blocks to transfer, report the operational size
+             * from the HCD max value */
+        pHcd->CardProperties.OperBlockCountLimit = pHcd->MaxBlocksPerTrans;
+            /* set the slot preferred voltage */
+        pHcd->CardProperties.CardVoltage = pHcd->SlotVoltagePreferred;
+    } else {
+            /* initialize this card and get card properties  */
+        if (!SDIO_SUCCESS((status = SDInitializeCard(pHcd)))) {
+            DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: DeviceAttach, failed to initialize card, %d\n",
+                                   status));
+            return status;
+        }
+    }
+
+        /* check for SD or MMC, this must be done first as the query may involve
+         * de-selecting the card */
+    do {
+        if (!(pHcd->CardProperties.Flags & (CARD_MMC | CARD_SD | CARD_RAW))) {
+                /* none of these were discovered */
+            break;
+        }
+        pDevice = AllocateDevice(pHcd);
+        if (NULL == pDevice) {
+            break;
+        }
+        if (pHcd->CardProperties.Flags & CARD_RAW) {
+                /* set function number to 1 for IRQ processing */
+            SDDEVICE_SET_SDIO_FUNCNO(pDevice,1);
+        } else {
+                /* get the ID info for the SD/MMC Card */
+            if (!SDIO_SUCCESS((status = SDQuerySDMMCInfo(pDevice)))) {
+                DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: DeviceAttach, query SDMMC Info failed \n"));
+                FreeDevice(pDevice);
+                break;
+            }
+        }
+        AddDeviceToList(pDevice);
+            /* look for a function driver to handle this card */
+        ProbeForFunction(pDevice, pHcd);
+    } while (FALSE);
+
+        /* create a device for each I/O function */
+    for(ii= 1; ii <= pHcd->CardProperties.IOFnCount; ii++) {
+        pDevice = AllocateDevice(pHcd);
+        if (NULL == pDevice) {
+            break;
+        }
+            /* set the function number */
+        SDDEVICE_SET_SDIO_FUNCNO(pDevice,ii);
+            /* get the ID info for each I/O function */
+        if (!SDIO_SUCCESS((status = SDQuerySDIOInfo(pDevice)))) {
+            DBG_PRINT(SDDBG_ERROR,
+                    ("SDIO Bus Driver: DeviceAttach, could not query SDIO Info, funcNo:%d status:%d \n",
+                    ii, status));
+            FreeDevice(pDevice);
+                /* keep loading other functions */
+            continue;
+        }
+        AddDeviceToList(pDevice);
+            /* look for a function driver to handle this card */
+        ProbeForFunction(pDevice, pHcd);
+    }
+
+
+    DBG_PRINT(SDDBG_TRACE, ("-SDIO Bus Driver: DeviceAttach \n"));
+    return status;
+}
+
+static INLINE void CompleteRequestCheckCancel(PSDHCD pHcd, PSDREQUEST pReqToComplete)
+{
+    BOOL cancel = FALSE;
+    PSDFUNCTION pFunc = NULL;
+
+        /* handle cancel of current request */
+    if (pReqToComplete->Flags & SDREQ_FLAGS_CANCELED) {
+        DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver - _SDIO_HandleHcdEvent: cancelling req 0X%X\n", (UINT)pReqToComplete));
+        cancel = TRUE;
+        pReqToComplete->Status = SDIO_STATUS_CANCELED;
+        pFunc = pReqToComplete->pFunction;
+        DBG_ASSERT(pFunc != NULL);
+    }
+
+    DoRequestCompletion(pReqToComplete, pHcd);
+
+    if (cancel) {
+        SignalSet(&pFunc->CleanupReqSig);
+    }
+}
+
+/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  @function: Indicate to the SDIO bus driver (core) of an event in the host controller
+             driver.
+
+  @function name: SDIO_HandleHcdEvent
+  @prototype: SDIO_STATUS SDIO_HandleHcdEvent(PSDHCD pHcd, HCD_EVENT Event)
+  @category: HD_Reference
+
+  @input:  pHcd - the host controller structure that was registered
+           HCD_EVENT - event code
+
+  @output: none
+
+  @return: SDIO_STATUS
+
+  @notes:
+          The host controller driver can indicate asynchronous events by calling this
+          function with an appropriate event code. Refer to the HDK help manual for
+          more information on the event types
+
+  @example: Example of indicating a card insertion event:
+            SDIO_HandleHcdEvent(&Hcd, EVENT_HCD_ATTACH);
+
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+SDIO_STATUS _SDIO_HandleHcdEvent(PSDHCD pHcd, HCD_EVENT Event)
+{
+    PSDREQUEST       pReq;
+    PSDREQUEST       pReqToComplete = NULL;
+    PSDREQUEST       pNextReq = NULL;
+    SDIO_STATUS      status;
+    CT_DECLARE_IRQ_SYNC_CONTEXT();
+
+    DBG_PRINT(SDIODBG_HCD_EVENTS, ("SDIO Bus Driver: _SDIO_HandleHcdEvent, event type 0x%X, HCD:0x%X\n",
+                         Event, (UINT)pHcd));
+
+    if (Event == EVENT_HCD_TRANSFER_DONE) {
+        pReq = GET_CURRENT_REQUEST(pHcd);
+        if (NULL == pReq) {
+            DBG_ASSERT(FALSE);
+            return SDIO_STATUS_ERROR;
+        }
+
+        status = _AcquireHcdLock(pHcd);
+        if (SDIO_SUCCESS(status)) {
+                /* null out the current request */
+            SET_CURRENT_REQUEST(pHcd, NULL);
+            status = _ReleaseHcdLock(pHcd);
+        } else {
+            DBG_PRINT(SDDBG_ERROR,
+              ("SDIO Bus Driver: SDIO_HandleHcdEvent Failed to acquire HCD lock \n"));
+            return SDIO_STATUS_ERROR;
+        }
+
+            /* note: the queue is still marked busy to prevent other threads/tasks from starting
+             * new requests while we are handling completion , some completed requests are
+             * marked as barrier requests which must be handled atomically */
+
+        status = pReq->Status;
+        DBG_PRINT(SDIODBG_REQUESTS,
+            ("+SDIO Bus Driver: Handling Transfer Done (CMD:%d, Status:%d) from HCD:0x%08X \n",
+                  pReq->Command, status, (INT)pHcd));
+            /* check SPI mode conversion */
+        if (IS_HCD_BUS_MODE_SPI(pHcd) && SDIO_SUCCESS(status)) {
+            if (!(pReq->Flags & SDREQ_FLAGS_RESP_SKIP_SPI_FILT) && !(pReq->Flags & SDREQ_FLAGS_PSEUDO) &&
+                (GET_SDREQ_RESP_TYPE(pReq->Flags) != SDREQ_FLAGS_NO_RESP)) {
+                ConvertSPI_Response(pReq, NULL);
+            }
+        }
+
+        DBG_PRINT(SDIODBG_REQUESTS, ("SDIO Bus Driver: Completing Request:0x%08X \n",(INT)pReq));
+
+        if (!SDIO_SUCCESS(status) &&
+            (status != SDIO_STATUS_CANCELED)  &&
+            !(pReq->Flags & SDREQ_FLAGS_CANCELED) &&
+            (pReq->RetryCount > 0)) {
+                /* retry the request if it failed, was NOT cancelled and the retry count
+                 * is greater than zero */
+            pReq->RetryCount--;
+            pReqToComplete = NULL;
+                /* clear SPI converted flag */
+            pReq->Flags &= ~SDREQ_FLAGS_RESP_SPI_CONVERTED;
+            pNextReq = pReq;
+        } else {
+                /* complete the request */
+            if (pReq->Flags & SDREQ_FLAGS_BARRIER) {
+                    /* a barrier request must be completed before the next bus request is
+                     * started */
+                CompleteRequestCheckCancel(pHcd, pReq);
+                if (!ForceAllRequestsAsync()) {
+                    if (CHECK_API_VERSION_COMPAT(pHcd,2,6)) {
+                            /* the request was completed, decrement recursion count */
+                        status = _AcquireHcdLock(pHcd);
+                        if (!SDIO_SUCCESS(status)) {
+                            return status;
+                        }
+                        pHcd->Recursion--;
+                        DBG_ASSERT(pHcd->Recursion >= 0);
+                        status = _ReleaseHcdLock(pHcd);
+                    } else {
+                            /* reset bit */
+                        AtomicTest_Clear(&pHcd->HcdFlags, HCD_REQUEST_CALL_BIT);
+                    }
+                }
+                pReqToComplete = NULL;
+            } else {
+                    /* complete this after the next request has
+                     * been started */
+                pReqToComplete = pReq;
+            }
+        }
+
+            /* acquire the hcd lock to look at the queues */
+        status = _AcquireHcdLock(pHcd);
+        if (SDIO_SUCCESS(status)) {
+            if (pReqToComplete != NULL) {
+                    /* queue the request that was completed */
+                QueueRequest(&pHcd->CompletedRequestQueue, pReqToComplete);
+            }
+            if (NULL == pNextReq) {
+                    /* check the queue for the next request */
+                DBG_PRINT(SDIODBG_REQUESTS, ("SDIO Bus Driver: Checking queue.. \n"));
+                    /* check to see if the HCD was already working on one.  This occurs if
+                     * the current request being completed was a barrier request and the
+                     * barrier completion routine submitted a new request to the head of the
+                     * queue */
+                if (GET_CURRENT_REQUEST(pHcd) == NULL) {
+                    pNextReq = DequeueRequest(&pHcd->RequestQueue);
+                    if (NULL == pNextReq) {
+                            /* nothing in the queue, mark it not busy */
+                        MarkQueueNotBusy(&pHcd->RequestQueue);
+                        DBG_PRINT(SDIODBG_REQUESTS, ("SDIO Bus Driver: Queue idle \n"));
+                    } else {
+                        DBG_PRINT(SDIODBG_REQUESTS, ("SDIO Bus Driver: Next request in queue: 0x%X \n",
+                            (INT)pNextReq));
+                    }
+                } else {
+                    DBG_PRINT(SDIODBG_REQUESTS,
+                        ("SDIO Bus Driver: Busy Queue from barrier request \n"));
+                }
+            }
+
+            if (pNextReq != NULL) {
+                    /* a new request will be submitted to the HCD below,
+                     * check recursion while we have the lock */
+                if (CHECK_API_VERSION_COMPAT(pHcd,2,6)) {
+                    CHECK_HCD_RECURSE(pHcd,pNextReq);
+                }
+            }
+            status = _ReleaseHcdLock(pHcd);
+        } else {
+            DBG_PRINT(SDDBG_ERROR,
+              ("SDIO Bus Driver: SDIO_HandleHcdEvent Failed to acquire HCD lock \n"));
+            return SDIO_STATUS_ERROR;
+        }
+            /* check for the next request to issue */
+        if (pNextReq != NULL) {
+            DBG_PRINT(SDIODBG_REQUESTS, ("SDIO Bus Driver: Starting Next Request: 0x%X \n",
+                        (INT)pNextReq));
+            SET_CURRENT_REQUEST(pHcd,pNextReq);
+            status = CallHcdRequest(pHcd);
+                /* check and see if the HCD completed the request in the callback */
+            if (status != SDIO_STATUS_PENDING) {
+                    /* recurse and process the request */
+                _SDIO_HandleHcdEvent(pHcd, EVENT_HCD_TRANSFER_DONE);
+            }
+        }
+
+        /* now empty the completed request queue
+         * - this guarantees in-order completion even during recursion */
+        status = _AcquireHcdLock(pHcd);
+        if (SDIO_SUCCESS(status)) {
+            while (1) {
+                pReqToComplete = DequeueRequest(&pHcd->CompletedRequestQueue);
+                status = _ReleaseHcdLock(pHcd);
+                if (pReqToComplete != NULL) {
+                    CompleteRequestCheckCancel(pHcd, pReqToComplete);
+                    if (!CHECK_API_VERSION_COMPAT(pHcd,2,6)) {
+                        if (!ForceAllRequestsAsync()) {
+                                /* reset bit */
+                            AtomicTest_Clear(&pHcd->HcdFlags, HCD_REQUEST_CALL_BIT);
+                        }
+                    }
+                        /* re-acquire lock */
+                    status = _AcquireHcdLock(pHcd);
+                    if (!SDIO_SUCCESS(status)) {
+                        return SDIO_STATUS_ERROR;
+                    }
+                    if (CHECK_API_VERSION_COMPAT(pHcd,2,6)) {
+                        if (!ForceAllRequestsAsync()) {
+                            /* while we have the lock, decrement recursion count each time
+                             * we complete a request */
+                            pHcd->Recursion--;
+                            DBG_ASSERT(pHcd->Recursion >= 0);
+                        }
+                    }
+                }  else {
+                        /* we're done */
+                    break;
+                }
+            }
+        } else {
+            DBG_PRINT(SDDBG_ERROR,
+              ("SDIO Bus Driver: SDIO_HandleHcdEvent Failed to acquire HCD lock \n"));
+            return SDIO_STATUS_ERROR;
+        }
+        DBG_PRINT(SDIODBG_REQUESTS, ("-SDIO Bus Driver: Transfer Done Handled \n"));
+        return SDIO_STATUS_SUCCESS;
+    }
+
+    switch(Event) {
+        case EVENT_HCD_ATTACH:
+        case EVENT_HCD_DETACH:
+                /* card detect helper does the actual attach detach */
+            return PostCardDetectEvent(pBusContext,Event,pHcd);
+        case EVENT_HCD_SDIO_IRQ_PENDING:
+            return DeviceInterrupt(pHcd);
+        default:
+            DBG_PRINT(SDDBG_ERROR, ("-SDIO Bus Driver: SDIO_HandleHcdEvent, invalid event type 0x%X, HCD:0x%X\n",
+                                    Event, (UINT)pHcd));
+        return SDIO_STATUS_INVALID_PARAMETER;
+    }
+
+}
+
+/* card detect helper function */
+THREAD_RETURN CardDetectHelperFunction(POSKERNEL_HELPER pHelper)
+{
+    SDIO_STATUS       status;
+    HCD_EVENT_MESSAGE message;
+    INT               length;
+
+    DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver - CardDetectHelperFunction starting up: 0x%X \n", (INT)pHelper));
+
+    while (1) {
+
+            /* wait for wake up event */
+        status = SD_WAIT_FOR_WAKEUP(pHelper);
+        if (!SDIO_SUCCESS(status)) {
+            DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver - Card Detect Helper Semaphore Pend Error:%d \n",
+                                    status));
+            break;
+        }
+
+        if (SD_IS_HELPER_SHUTTING_DOWN(pHelper)) {
+                /* cleanup message queue on shutdown */
+            while (1) {
+                length = sizeof(message);
+                    /* get a message */
+                status = SDLIB_GetMessage(pBusContext->pCardDetectMsgQueue,
+                                          &message, &length);
+                if (!SDIO_SUCCESS(status)) {
+                    break;
+                }
+                if (message.pHcd != NULL) {
+                        /* decrement HCD reference count */
+                    OS_DecHcdReference(message.pHcd);
+                }
+            }
+
+            break;
+        }
+
+        while (1) {
+            length = sizeof(message);
+                /* get a message */
+            status = SDLIB_GetMessage(pBusContext->pCardDetectMsgQueue,
+                                      &message, &length);
+            if (!SDIO_SUCCESS(status)) {
+                break;
+            }
+
+            switch (message.Event) {
+                case EVENT_HCD_ATTACH:
+                    DeviceAttach(message.pHcd);
+                    break;
+                case EVENT_HCD_DETACH:
+                    DeviceDetach(message.pHcd);
+                    break;
+                case EVENT_HCD_CD_POLLING:
+                        /* run detector */
+                    RunCardDetect();
+                    break;
+                default:
+                    DBG_ASSERT(FALSE);
+                    break;
+            }
+
+            if (message.pHcd != NULL) {
+                    /* message was processed, decrement reference count */
+                OS_DecHcdReference(message.pHcd);
+            }
+        }
+    }
+
+    DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver - Card Detect Helper Exiting.. \n"));
+    return 0;
+}
+
+
+/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  RunCardDetect - run card detect on host controller slots that require polling
+  Input:
+  Output:
+  Return:
+  Notes: This function is called from the card detect timer thread
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+void RunCardDetect(void)
+{
+    BOOL       CDPollingRequired = FALSE;
+    PSDLIST    pListItem;
+    PSDHCD     pHcd;
+    BOOL       cardPresent;
+
+    DBG_PRINT(SDIODBG_CD_TIMER, ("+SDIO Bus Driver: RunCardDetect\n"));
+
+       /* protect the HCD list */
+    if (!SDIO_SUCCESS(SemaphorePendInterruptable(&pBusContext->HcdListSem))) {
+        DBG_ASSERT(FALSE);
+        return;  /* wait interrupted */
+    }
+        /* while we are running the detector we are blocking HCD removal*/
+    SDITERATE_OVER_LIST(&pBusContext->HcdList, pListItem) {
+        pHcd = CONTAINING_STRUCT(pListItem, SDHCD, SDList);
+            /* does the HCD require polling ? */
+        if (pHcd->Attributes & SDHCD_ATTRIB_SLOT_POLLING) {
+            DBG_PRINT(SDIODBG_CD_TIMER, ("SDIO Bus Driver: Found HCD requiring polling \n"));
+                /* set flag to queue the timer */
+            CDPollingRequired = TRUE;
+            if (IS_CARD_PRESENT(pHcd)) {
+                    /* there is a device in the slot */
+                cardPresent = TRUE;
+                if (SDIO_SUCCESS(ScanSlotForCard(pHcd,&cardPresent))) {
+                    if (!cardPresent) {
+                        DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver CD Polling.. Card Removal Detected\n"));
+                        DeviceDetach(pHcd);
+                    }
+                }
+            } else {
+                cardPresent = FALSE;
+                if (SDIO_SUCCESS(ScanSlotForCard(pHcd,&cardPresent))) {
+                     if (cardPresent) {
+                        DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver CD Polling.. Card Detected\n"));
+                        DeviceAttach(pHcd);
+                    }
+                }
+            }
+        }
+
+        DBG_PRINT(SDIODBG_CD_TIMER, ("SDIO Bus Driver: moving to next hcd:0x%X \n",
+                                     (INT)pListItem->pNext));
+    }
+
+        /* check if we need to queue the timer */
+    if (CDPollingRequired && !pBusContext->CDTimerQueued) {
+        pBusContext->CDTimerQueued = TRUE;
+        DBG_PRINT(SDIODBG_CD_TIMER, ("SDIO Bus Driver: Queuing Card detect timer \n"));
+        if (!SDIO_SUCCESS(
+            QueueTimer(SDIOBUS_CD_TIMER_ID, pBusContext->CDPollingInterval))) {
+            DBG_PRINT(SDDBG_WARN, ("SDIO Bus Driver: failed to queue CD timer \n"));
+            pBusContext->CDTimerQueued = FALSE;
+        }
+    }
+        /* release HCD list lock */
+    SemaphorePost(&pBusContext->HcdListSem);
+    DBG_PRINT(SDIODBG_CD_TIMER, ("-SDIO Bus Driver: RunCardDetect\n"));
+}
+
+
+/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  ScanSlotForCard - scan slot for a card
+  Input:  pHcd - the hcd
+  Output: pCardPresent - card present flag (set/cleared on return)
+  Return:
+  Notes:
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+static SDIO_STATUS ScanSlotForCard(PSDHCD pHcd,PBOOL pCardPresent)
+{
+    SDIO_STATUS         status = SDIO_STATUS_SUCCESS;
+    UINT8               temp;
+
+    DBG_PRINT(SDIODBG_CD_TIMER, ("+SDIO Bus Driver: ScanSlotForCard\n"));
+
+    do {
+        if (!IS_CARD_PRESENT(pHcd)) {
+            INT   dbgLvl;
+            dbgLvl = DBG_GET_DEBUG_LEVEL();
+            DBG_SET_DEBUG_LEVEL(SDDBG_WARN);
+            status = CardInitSetup(pHcd);
+            DBG_SET_DEBUG_LEVEL(dbgLvl);
+            if (!SDIO_SUCCESS(status)) {
+                break;
+            }
+                /* issue go-idle */
+            if (IS_HCD_BUS_MODE_SPI(pHcd)) {
+                _IssueSimpleBusRequest(pHcd,CMD0,0,SDREQ_FLAGS_RESP_R1,NULL);
+            } else {
+                _IssueSimpleBusRequest(pHcd,CMD0,0,SDREQ_FLAGS_NO_RESP,NULL);
+            }
+                /* try SDIO */
+            status = TestPresence(pHcd,CARD_SDIO,NULL);
+            if (SDIO_SUCCESS(status)) {
+                *pCardPresent = TRUE;
+                break;
+            }
+                /* issue go-idle */
+            if (IS_HCD_BUS_MODE_SPI(pHcd)) {
+                _IssueSimpleBusRequest(pHcd,CMD0,0,SDREQ_FLAGS_RESP_R1,NULL);
+            } else {
+                _IssueSimpleBusRequest(pHcd,CMD0,0,SDREQ_FLAGS_NO_RESP,NULL);
+            }
+                /* try SD */
+            status = TestPresence(pHcd,CARD_SD,NULL);
+            if (SDIO_SUCCESS(status)) {
+                *pCardPresent = TRUE;
+                break;
+            }
+                /* issue go-idle */
+            if (IS_HCD_BUS_MODE_SPI(pHcd)) {
+                _IssueSimpleBusRequest(pHcd,CMD0,0,SDREQ_FLAGS_RESP_R1,NULL);
+            } else {
+                _IssueSimpleBusRequest(pHcd,CMD0,0,SDREQ_FLAGS_NO_RESP,NULL);
+            }
+                /* try MMC */
+            status = TestPresence(pHcd,CARD_MMC,NULL);
+            if (SDIO_SUCCESS(status)) {
+                *pCardPresent = TRUE;
+                break;
+            }
+        } else {
+            if (pHcd->CardProperties.Flags & CARD_SDIO) {
+#ifdef DUMP_INT_PENDING
+                temp = 0;
+                    /* handy debug prints to check interrupt status and print pending register */
+                status = Cmd52ReadByteCommon(pHcd->pPseudoDev, SDIO_INT_ENABLE_REG, &temp);
+                if (SDIO_SUCCESS(status) && (temp != 0)) {
+                    DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: INT Enable Reg: 0x%2.2X\n", temp));
+                    status = Cmd52ReadByteCommon(pHcd->pPseudoDev, SDIO_INT_PENDING_REG, &temp);
+                    if (SDIO_SUCCESS(status)) {
+                        DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: INT Pend Reg: 0x%2.2X\n", temp));
+                    }
+                }
+#endif
+                    /* for SDIO cards, read the revision register */
+                status = Cmd52ReadByteCommon(pHcd->pPseudoDev, CCCR_SDIO_REVISION_REG, &temp);
+            } else if (pHcd->CardProperties.Flags & (CARD_SD | CARD_MMC)) {
+                    /* for SD/MMC cards, issue SEND_STATUS */
+                if (IS_HCD_BUS_MODE_SPI(pHcd)) {
+                        /* SPI uses the SPI R2 response */
+                    status = _IssueSimpleBusRequest(pHcd,
+                                                    CMD13,
+                                                    0,
+                                                    SDREQ_FLAGS_RESP_R2,
+                                                    NULL);
+                } else {
+                    status = _IssueSimpleBusRequest(pHcd,
+                                                    CMD13,
+                                                    (pHcd->CardProperties.RCA << 16),
+                                                    SDREQ_FLAGS_RESP_R1,NULL);
+                }
+            } else {
+                DBG_ASSERT(FALSE);
+            }
+            if (!SDIO_SUCCESS(status)) {
+                    /* card is gone */
+                *pCardPresent = FALSE;
+            }
+        }
+    } while (FALSE);
+
+    if (status == SDIO_STATUS_BUS_RESP_TIMEOUT) {
+        status = SDIO_STATUS_SUCCESS;
+    }
+
+    DBG_PRINT(SDIODBG_CD_TIMER, ("-SDIO Bus Driver: ScanSlotForCard status:%d\n",
+                                 status));
+
+    return status;
+}
+
+/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  DeviceInterrupt - handle device interrupt
+  Input:  pHcd -  host controller
+  Output:
+  Return:
+  Notes:
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+SDIO_STATUS DeviceInterrupt(PSDHCD pHcd)
+{
+    SDIO_STATUS status = SDIO_STATUS_SUCCESS;
+    SDIO_STATUS status2;
+    PSDREQUEST pReq = NULL;
+    CT_DECLARE_IRQ_SYNC_CONTEXT();
+
+    DBG_PRINT(SDIODBG_FUNC_IRQ, ("+SDIO Bus Driver: DeviceInterrupt\n"));
+
+    if (!IS_CARD_PRESENT(pHcd)) {
+        DBG_PRINT(SDDBG_ERROR, ("-SDIO Bus Driver: Device interrupt asserted on empty slot!\n"));
+        return SDIO_STATUS_ERROR;
+    }
+
+    do {
+            /* for RAW HCDs or HCDs flagged for single-function IRQ optimization */
+        if (IS_HCD_RAW(pHcd) || (pHcd->HcdFlags & (1 << HCD_IRQ_NO_PEND_CHECK))) {
+            status = _AcquireHcdLock(pHcd);
+            if (!SDIO_SUCCESS(status)) {
+                return status;
+            }
+            if (pHcd->IrqProcState != SDHCD_IDLE) {
+                status = SDIO_STATUS_ERROR;
+                status2 = _ReleaseHcdLock(pHcd);
+            } else {
+                DBG_PRINT(SDIODBG_FUNC_IRQ, ("SDIO Bus Driver :  Device Interrupt \n"));
+                    /* mark that we are processing */
+                pHcd->IrqProcState = SDHCD_IRQ_PENDING;
+                status2 = _ReleaseHcdLock(pHcd);
+                    /* process Irqs for raw hcds or HCDs with the single function optimization */
+                    /* force processing of function 1 interrupt */
+                ProcessPendingIrqs(pHcd, (1 << 1));
+            }
+            DBG_PRINT(SDIODBG_FUNC_IRQ, ("-SDIO Bus Driver: DeviceInterrupt: %d\n", status));
+                /* done with RAW irqs */
+            return status;
+        }
+
+            /* pre-allocate a request to get the pending bits, we have to do this outside the
+              * hcd lock acquisition */
+        pReq = AllocateRequest();
+
+        if (NULL == pReq) {
+            status = SDIO_STATUS_NO_RESOURCES;
+            break;
+        }
+
+        status = _AcquireHcdLock(pHcd);
+
+        if (!SDIO_SUCCESS(status)) {
+            break;
+        }
+
+        if (pHcd->IrqProcState != SDHCD_IDLE) {
+            status = SDIO_STATUS_ERROR;
+        } else {
+                /* mark that we are processing */
+            pHcd->IrqProcState = SDHCD_IRQ_PENDING;
+                /* build argument to read IRQ pending register */
+            SDIO_SET_CMD52_READ_ARG(pReq->Argument,0,SDIO_INT_PENDING_REG);
+            pReq->Command = CMD52;
+            pReq->Flags = SDREQ_FLAGS_TRANS_ASYNC | SDREQ_FLAGS_RESP_SDIO_R5;
+            pReq->pCompleteContext = (PVOID)pHcd;
+            pReq->pCompletion = GetPendingIrqComplete;
+            pReq->RetryCount = SDBUS_MAX_RETRY;
+        }
+
+        status2 = _ReleaseHcdLock(pHcd);
+
+        if (!SDIO_SUCCESS(status2)) {
+            DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: lock release error: %d\n", status2));
+        }
+
+    } while (FALSE);
+
+    if (SDIO_SUCCESS(status)) {
+        DBG_ASSERT(pReq != NULL);
+        IssueRequestToHCD(pHcd,pReq);
+        status = SDIO_STATUS_PENDING;
+    } else {
+        if (pReq != NULL) {
+            FreeRequest(pReq);
+        }
+    }
+
+    DBG_PRINT(SDIODBG_FUNC_IRQ, ("-SDIO Bus Driver: DeviceInterrupt: %d\n", status));
+    return status;
+}
+
+
+/* SDIO IRQ helper */
+THREAD_RETURN SDIOIrqHelperFunction(POSKERNEL_HELPER pHelper)
+{
+    PSDHCD            pHcd;
+    SDIO_STATUS       status;
+    PSDLIST           pListItem;
+    PSDDEVICE         pDevice;
+    UINT8             funcMask;
+    PSDDEVICE         pDeviceIRQ[7];
+    UINT              deviceIrqCount = 0;
+    UINT              ii;
+
+    DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver - SDIOIrqHelperFunction starting up \n"));
+
+    pHcd = (PSDHCD)pHelper->pContext;
+    DBG_ASSERT(pHcd != NULL);
+
+    while (1) {
+
+            /* wait for wake up event */
+        status = SD_WAIT_FOR_WAKEUP(pHelper);
+
+        if (!SDIO_SUCCESS(status)) {
+            DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver - SDIOIrqHelperFunction Pend Error:%d \n",
+                                    status));
+            break;
+        }
+
+        if (SD_IS_HELPER_SHUTTING_DOWN(pHelper)) {
+            break;
+        }
+
+        DBG_PRINT(SDIODBG_FUNC_IRQ, ("SDIO Bus Driver - Pending IRQs:0x%X \n",
+                                     pHcd->PendingHelperIrqs));
+
+         /* take the device list lock as we iterate through the list, this blocks
+             * device removals */
+        status = SemaphorePendInterruptable(&pBusContext->DeviceListSem);
+        if (!SDIO_SUCCESS(status)) {
+            break;
+        }
+            /* walk through the device list matching HCD and interrupting function */
+        SDITERATE_OVER_LIST(&pBusContext->DeviceList, pListItem) {
+            pDevice = CONTAINING_STRUCT(pListItem, SDDEVICE, SDList);
+                /* check if device belongs to the HCD */
+            if (pDevice->pHcd != pHcd){
+                    /* not on this hcd */
+                continue;
+            }
+            funcMask = 1 << SDDEVICE_GET_SDIO_FUNCNO(pDevice);
+                /* check device function against the pending mask */
+            if (!(funcMask & pHcd->PendingHelperIrqs)) {
+                    /* this one is not scheduled for the helper */
+                continue;
+            }
+                /* clear bit */
+            pHcd->PendingHelperIrqs &= ~funcMask;
+                /* check for sync IRQ and call handler */
+            if (pDevice->pIrqFunction != NULL) {
+                DBG_PRINT(SDIODBG_FUNC_IRQ, ("SDIO Bus Driver: Calling IRQ Handler. Fn:%d\n",
+                                             SDDEVICE_GET_SDIO_FUNCNO(pDevice)));
+                /* save the device so we can process it without holding any locks */
+                pDeviceIRQ[deviceIrqCount++] = pDevice;
+            } else {
+                    /* this is actually okay if the device is removing, the callback
+                     * is NULLed out */
+                DBG_PRINT(SDIODBG_FUNC_IRQ, ("SDIO Bus Driver: No IRQ handler Fn:%d\n",
+                                             SDDEVICE_GET_SDIO_FUNCNO(pDevice)));
+            }
+        }
+            /* should have handled all these */
+        DBG_ASSERT(pHcd->PendingHelperIrqs == 0);
+        pHcd->PendingHelperIrqs = 0;
+        SemaphorePost(&pBusContext->DeviceListSem);
+        for (ii = 0; ii < deviceIrqCount; ii++) {
+            /* now call the function */
+            SDDEVICE_CALL_IRQ_HANDLER(pDeviceIRQ[ii]);
+        }
+        deviceIrqCount = 0;
+    }
+
+    DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver - SDIOIrqHelperFunction Exiting.. \n"));
+    return 0;
+}
+
+/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  GetPendingIrqComplete - completion routine for getting pending IRQs
+  Input:  pRequest -  completed request
+  Output:
+  Return:
+  Notes:
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+static void GetPendingIrqComplete(PSDREQUEST pReq)
+{
+    UINT8       intPendingMsk;
+    PSDHCD      pHcd;
+
+    do {
+        pHcd = (PSDHCD)pReq->pCompleteContext;
+        DBG_ASSERT(pHcd != NULL);
+
+        if (!SDIO_SUCCESS(pReq->Status)) {
+            DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Failed to get Interrupt pending register Err:%d\n",
+                                    pReq->Status));
+            break;
+        }
+
+        if (SD_R5_GET_RESP_FLAGS(pReq->Response) & SD_R5_ERRORS) {
+            DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: CMD52 resp error: 0x%X \n",
+                                    SD_R5_GET_RESP_FLAGS(pReq->Response)));
+            break;
+        }
+            /* extract the pending mask */
+        intPendingMsk =  SD_R5_GET_READ_DATA(pReq->Response) & SDIO_INT_PEND_MASK;
+            /* process them */
+        ProcessPendingIrqs(pHcd, intPendingMsk);
+
+    } while (FALSE);
+
+    FreeRequest(pReq);
+
+    DBG_PRINT(SDIODBG_FUNC_IRQ, ("-SDIO Bus Driver: GetPendingIrqComplete \n"));
+}
+
+/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  ProcessPendingIrqs - processing pending Irqs
+  Input:  pHcd - host controller
+  Input:  IntPendingMsk -  pending irq bit mask
+  Output:
+  Return:
+  Notes:
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+static void ProcessPendingIrqs(PSDHCD pHcd, UINT8 IntPendingMsk)
+{
+    PSDLIST     pListItem;
+    PSDDEVICE   pDevice;
+    UINT8       funcMask;
+    SDIO_STATUS status = SDIO_STATUS_SUCCESS;
+    CT_DECLARE_IRQ_SYNC_CONTEXT();
+
+    DBG_PRINT(SDIODBG_FUNC_IRQ, ("+SDIO Bus Driver: ProcessPendingIrqs \n"));
+    do {
+            /* acquire lock to protect configuration and irq enables */
+        status = _AcquireHcdLock(pHcd);
+        if (!SDIO_SUCCESS(status)) {
+            break;
+        }
+
+            /* sanity check */
+        if ((IntPendingMsk & pHcd->IrqsEnabled) != IntPendingMsk) {
+            DBG_PRINT(SDDBG_ERROR,
+                ("SDIO Bus Driver: IRQs asserting when not enabled : curr:0x%X , card reports: 0x%X\n",
+                     pHcd->IrqsEnabled, IntPendingMsk));
+                /* remove the pending IRQs that are not enabled */
+            IntPendingMsk &= pHcd->IrqsEnabled;
+                /* fall through */
+        }
+
+        if (!IntPendingMsk) {
+            DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: No interrupts on HCD:0x%X \n", (INT)pHcd));
+            pHcd->IrqProcState = SDHCD_IDLE;
+            if (pHcd->IrqsEnabled) {
+                    /* only re-arm if there are IRQs enabled */
+                _IssueConfig(pHcd,SDCONFIG_SDIO_REARM_INT,NULL,0);
+            }
+            status = _ReleaseHcdLock(pHcd);
+            break;
+        }
+            /* reset helper IRQ bits */
+        pHcd->PendingHelperIrqs = 0;
+            /* save pending IRQ acks */
+        pHcd->PendingIrqAcks = IntPendingMsk;
+        status = _ReleaseHcdLock(pHcd);
+        DBG_PRINT(SDIODBG_FUNC_IRQ, ("SDIO Bus Driver: INTs Pending - 0x%2.2X \n", IntPendingMsk));
+            /* take the device list lock as we iterate through the list, this blocks
+             * device removals */
+        status = SemaphorePendInterruptable(&pBusContext->DeviceListSem);
+        if (!SDIO_SUCCESS(status)) {
+            break;
+        }
+            /* walk through the device list matching HCD and interrupting function */
+        SDITERATE_OVER_LIST(&pBusContext->DeviceList, pListItem) {
+            pDevice = CONTAINING_STRUCT(pListItem, SDDEVICE, SDList);
+                /* check if device belongs to the HCD */
+            if (pDevice->pHcd != pHcd){
+                    /* not on this hcd */
+                continue;
+            }
+            funcMask = 1 << SDDEVICE_GET_SDIO_FUNCNO(pDevice);
+                /* check device function against the pending mask */
+            if (!(funcMask & IntPendingMsk)) {
+                    /* this one is not interrupting */
+                continue;
+            }
+                /* check for async IRQ and call handler */
+            if (pDevice->pIrqAsyncFunction != NULL) {
+                DBG_PRINT(SDIODBG_FUNC_IRQ, ("SDIO Bus Driver: Calling Async IRQ Handler. Fn:%d\n",
+                                             SDDEVICE_GET_SDIO_FUNCNO(pDevice)));
+                SDDEVICE_CALL_IRQ_ASYNC_HANDLER(pDevice);
+            } else {
+                    /* this one needs the helper */
+                pHcd->PendingHelperIrqs |= funcMask;
+                DBG_PRINT(SDIODBG_FUNC_IRQ, ("SDIO Bus Driver: No Async IRQ, Pending Helper Fn:%d\n",
+                                             SDDEVICE_GET_SDIO_FUNCNO(pDevice)));
+            }
+        }
+            /* release HCD list lock */
+        SemaphorePost(&pBusContext->DeviceListSem);
+            /* check for helper IRQs */
+        if (pHcd->PendingHelperIrqs) {
+            pHcd->IrqProcState = SDHCD_IRQ_HELPER;
+            DBG_PRINT(SDIODBG_FUNC_IRQ, ("SDIO Bus Driver: Waking IRQ Helper \n"));
+            if (!SDIO_SUCCESS(SD_WAKE_OS_HELPER(&pHcd->SDIOIrqHelper))) {
+                DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: failed to wake helper! \n"));
+            }
+        }
+    } while (FALSE);
+
+    DBG_PRINT(SDIODBG_FUNC_IRQ, ("-SDIO Bus Driver: ProcessPendingIrqs \n"));
+}
+
+SDIO_STATUS TryNoIrqPendingCheck(PSDDEVICE pDevice)
+{
+    if (pDevice->pHcd->CardProperties.IOFnCount > 1) {
+            /* not supported on multi-function cards */
+        DBG_PRINT(SDDBG_WARN, ("SDIO Bus Driver: IRQ Pending Check cannot be bypassed, (Funcs:%d)\n",
+            pDevice->pHcd->CardProperties.IOFnCount));
+        return SDIO_STATUS_UNSUPPORTED;
+    }
+
+    DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: pending IRQ check bypassed \n"));
+        /* set flag to optimize this */
+    AtomicTest_Set(&pDevice->pHcd->HcdFlags, HCD_IRQ_NO_PEND_CHECK);
+    return SDIO_STATUS_SUCCESS;
+}
+
+
+/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  SDIO_NotifyTimerTriggered - notification handler that a timer expired
+  Input:  TimerID - ID of timer that expired
+  Output:
+  Return:
+  Notes:
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+void SDIO_NotifyTimerTriggered(INT TimerID)
+{
+
+    switch (TimerID) {
+        case SDIOBUS_CD_TIMER_ID:
+            pBusContext->CDTimerQueued = FALSE;
+                /* post an HCD polling event to the helper thread */
+            PostCardDetectEvent(pBusContext, EVENT_HCD_CD_POLLING, NULL);
+            break;
+        default:
+            DBG_ASSERT(FALSE);
+    }
+
+}
diff --git a/drivers/sdio/stack/busdriver/sdio_bus_misc.c b/drivers/sdio/stack/busdriver/sdio_bus_misc.c
new file mode 100644
index 00000000000..c5c73810782
--- /dev/null
+++ b/drivers/sdio/stack/busdriver/sdio_bus_misc.c
@@ -0,0 +1,3122 @@
+/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+@file: sdio_bus_misc.c
+
+@abstract: OS independent bus driver support
+
+#notes: this file contains miscellaneous control functions
+
+@notice: Copyright (c), 2004-2006 Atheros Communications, Inc.
+
+
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 as
+ *  published by the Free Software Foundation;
+ *
+ *  Software distributed under the License is distributed on an "AS
+ *  IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+ *  implied. See the License for the specific language governing
+ *  rights and limitations under the License.
+ *
+ *  Portions of this code were developed with information supplied from the
+ *  SD Card Association Simplified Specifications. The following conditions and disclaimers may apply:
+ *
+ *   The following conditions apply to the release of the SD simplified specification (�Simplified
+ *   Specification�) by the SD Card Association. The Simplified Specification is a subset of the complete
+ *   SD Specification which is owned by the SD Card Association. This Simplified Specification is provided
+ *   on a non-confidential basis subject to the disclaimers below. Any implementation of the Simplified
+ *   Specification may require a license from the SD Card Association or other third parties.
+ *   Disclaimers:
+ *   The information contained in the Simplified Specification is presented only as a standard
+ *   specification for SD Cards and SD Host/Ancillary products and is provided "AS-IS" without any
+ *   representations or warranties of any kind. No responsibility is assumed by the SD Card Association for
+ *   any damages, any infringements of patents or other right of the SD Card Association or any third
+ *   parties, which may result from its use. No license is granted by implication, estoppel or otherwise
+ *   under any patent or other rights of the SD Card Association or any third party. Nothing herein shall
+ *   be construed as an obligation by the SD Card Association to disclose or distribute any technical
+ *   information, know-how or other confidential information to any third party.
+ *
+ *
+ *  The initial developers of the original code are Seung Yi and Paul Lever
+ *
+ *  sdio@atheros.com
+ *
+ *
+
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+#define MODULE_NAME  SDBUSDRIVER
+#include <linux/sdio/ctsystem.h>
+#include <linux/sdio/sdio_busdriver.h>
+#include <linux/sdio/sdio_lib.h>
+#include "_busdriver.h"
+#include <linux/sdio/_sdio_defs.h>
+#include <linux/sdio/mmc_defs.h>
+
+
+/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  IssueBusRequestBd - issue a bus request
+  Input:  pHcd - HCD object
+          Cmd - command to issue
+          Argument - command argument
+          Flags - request flags
+
+  Output: pReqToUse - request to use (if caller wants response data)
+  Return: SDIO Status
+  Notes:  This function only issues 1 block data transfers
+          This function issues the request synchronously
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+SDIO_STATUS _IssueBusRequestBd(PSDHCD           pHcd,
+                               UINT8            Cmd,
+                               UINT32           Argument,
+                               SDREQUEST_FLAGS  Flags,
+                               PSDREQUEST       pReqToUse,
+                               PVOID            pData,
+                               INT              Length)
+{
+    SDIO_STATUS status = SDIO_STATUS_SUCCESS;
+    PSDREQUEST  pReq;
+
+    if (NULL == pReqToUse) {
+            /* caller doesn't care about the response data, allocate locally */
+        pReq = AllocateRequest();
+        if (NULL == pReq) {
+            return SDIO_STATUS_NO_RESOURCES;
+        }
+    } else {
+            /* use the caller's request buffer */
+        pReq = pReqToUse;
+    }
+
+    pReq->Argument = Argument;
+    pReq->Flags = Flags;
+    pReq->Command = Cmd;
+    if (pReq->Flags & SDREQ_FLAGS_DATA_TRANS) {
+        pReq->pDataBuffer  = pData;
+        pReq->BlockCount = 1;
+        pReq->BlockLen = Length;
+    }
+
+    status = IssueRequestToHCD(pHcd,pReq);
+
+    if (NULL == pReqToUse) {
+        DBG_ASSERT(pReq != NULL);
+        FreeRequest(pReq);
+    }
+    return status;
+}
+
+/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  ConvertVoltageCapsToOCRMask - initialize card
+  Input:  VoltageCaps - voltage cap to look up
+  Return: 32 bit OCR mask
+  Notes:  this function sets voltage for +- 10%
+
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+static UINT32 ConvertVoltageCapsToOCRMask(SLOT_VOLTAGE_MASK VoltageCaps)
+{
+    UINT32 ocrMask;
+
+    ocrMask = 0;
+
+    if (VoltageCaps & SLOT_POWER_3_3V) {
+        ocrMask |= SD_OCR_3_2_TO_3_3_VDD | SD_OCR_3_3_TO_3_4_VDD;
+    }
+    if (VoltageCaps & SLOT_POWER_3_0V) {
+        ocrMask |= SD_OCR_2_9_TO_3_0_VDD | SD_OCR_3_0_TO_3_1_VDD;
+    }
+    if (VoltageCaps & SLOT_POWER_2_8V) {
+        ocrMask |= SD_OCR_2_7_TO_2_8_VDD | SD_OCR_2_8_TO_2_9_VDD;
+    }
+    if (VoltageCaps & SLOT_POWER_2_0V) {
+        ocrMask |= SD_OCR_1_9_TO_2_0_VDD | SD_OCR_2_0_TO_2_1_VDD;
+    }
+    if (VoltageCaps & SLOT_POWER_1_8V) {
+        ocrMask |= SD_OCR_1_7_TO_1_8_VDD | SD_OCR_1_8_TO_1_9_VDD;
+    }
+    if (VoltageCaps & SLOT_POWER_1_6V) {
+        ocrMask |= SD_OCR_1_6_TO_1_7_VDD;
+    }
+
+    return ocrMask;
+}
+
+static UINT32 GetUsableOCRValue(UINT32 CardOCR, UINT32 SlotOCRMask)
+{
+    INT    i;
+    UINT32 mask = 0;
+
+    for (i = 0; i < 32; i++) {
+        mask = 1 << i;
+        if ((SlotOCRMask & mask) && (CardOCR & mask)) {
+            return mask;
+        }
+    }
+
+    return mask;
+}
+
+/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  GetPowerSetting - power up the SDIO card
+  Input:  pHcd - HCD object
+          pOCRvalue - OCR value of the card
+  Output: pOCRvalue - OCR to actually use
+  Return: power setting for HCD based on card's OCR, zero indicates unsupported
+  Notes:
+
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+static SLOT_VOLTAGE_MASK GetPowerSetting(PSDHCD pHcd, UINT32 *pOCRvalue)
+{
+    UINT32                      ocrMask;
+    SLOT_VOLTAGE_MASK           hcdVoltage = 0;
+    SLOT_VOLTAGE_MASK           hcdVMask;
+    INT                         i;
+
+        /* check preferred value */
+    ocrMask = ConvertVoltageCapsToOCRMask(pHcd->SlotVoltagePreferred);
+    if (ocrMask & *pOCRvalue) {
+            /* using preferred voltage */
+        *pOCRvalue = GetUsableOCRValue(*pOCRvalue, ocrMask);
+        hcdVoltage = pHcd->SlotVoltagePreferred;
+    } else {
+            /* walk through the slot voltage caps and find a match */
+        for (i = 0; i < 8; i++) {
+            hcdVMask = (1 << i);
+            if (hcdVMask & pHcd->SlotVoltageCaps) {
+                ocrMask = ConvertVoltageCapsToOCRMask((SLOT_VOLTAGE_MASK)(pHcd->SlotVoltageCaps & hcdVMask));
+                if (ocrMask & *pOCRvalue) {
+                        /* found a match */
+                    *pOCRvalue = GetUsableOCRValue(*pOCRvalue, ocrMask);
+                    hcdVoltage = pHcd->SlotVoltageCaps & hcdVMask;
+                    break;
+                }
+            }
+        }
+    }
+
+    return hcdVoltage;
+}
+
+/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  TestPresence - test the presence of a card/function
+  Input:  pHcd - HCD object
+          TestType - type of test to perform
+  Output: pReq - Request to use (optional)
+  Return:
+  Notes:
+
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+SDIO_STATUS TestPresence(PSDHCD          pHcd,
+                         CARD_INFO_FLAGS TestType,
+                         PSDREQUEST      pReq)
+{
+    SDIO_STATUS status = SDIO_STATUS_ERROR;
+
+     switch (TestType) {
+        case CARD_SDIO:
+                /* issue CMD5 */
+            status = _IssueSimpleBusRequest(pHcd,CMD5,0,
+                        SDREQ_FLAGS_RESP_SDIO_R4 | SDREQ_FLAGS_RESP_SKIP_SPI_FILT,pReq);
+            break;
+        case CARD_SD:
+            if (IS_HCD_BUS_MODE_SPI(pHcd)) {
+                 /* ACMD41 just starts initialization when in SPI mode, argument is ignored
+                 * Note: In SPI mode ACMD41 uses an R1 response */
+                status = _IssueSimpleBusRequest(pHcd,ACMD41,0,
+                                                SDREQ_FLAGS_APP_CMD | SDREQ_FLAGS_RESP_R1,pReq);
+
+            } else {
+                /* issue ACMD41 with OCR value of zero */
+                /* ACMD41 on SD uses an R3 response */
+                status = _IssueSimpleBusRequest(pHcd,ACMD41,0,
+                                                SDREQ_FLAGS_APP_CMD | SDREQ_FLAGS_RESP_R3,pReq);
+            }
+            break;
+        case CARD_MMC:
+                 /* issue CMD1 */
+            if (IS_HCD_BUS_MODE_SPI(pHcd)) {
+                    /* note: in SPI mode an R1 response is used */
+                status = _IssueSimpleBusRequest(pHcd,CMD1,0,SDREQ_FLAGS_RESP_R1,pReq);
+            } else {
+                status = _IssueSimpleBusRequest(pHcd,CMD1,0,SDREQ_FLAGS_RESP_R3,pReq);
+            }
+            break;
+        default:
+            DBG_ASSERT(FALSE);
+            break;
+    }
+
+    return status;
+}
+/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  ReadOCR - read the OCR
+  Input:  pHcd - HCD object
+          ReadType - type of read to perform
+          OCRValue - OCR value to use as an argument
+  Output: pReq - Request to use
+          pOCRValueRd - OCR value read back (can be NULL)
+  Return:
+  Notes:
+
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+static SDIO_STATUS ReadOCR(PSDHCD          pHcd,
+                           CARD_INFO_FLAGS ReadType,
+                           PSDREQUEST      pReq,
+                           UINT32          OCRValue,
+                           UINT32          *pOCRValueRd)
+{
+    SDIO_STATUS status = SDIO_STATUS_ERROR;
+
+     switch (ReadType) {
+        case CARD_SDIO:
+                /* CMD5 for SDIO cards */
+            if (IS_HCD_BUS_MODE_SPI(pHcd)) {
+                    /* skip the SPI filter, we will decode the response here  */
+                status = _IssueSimpleBusRequest(pHcd,CMD5,
+                                                OCRValue,
+                                                SDREQ_FLAGS_RESP_SDIO_R4 |
+                                                SDREQ_FLAGS_RESP_SKIP_SPI_FILT,
+                                                pReq);
+            } else {
+                    /* native SD */
+                status = _IssueSimpleBusRequest(pHcd,CMD5,
+                                                OCRValue,
+                                                SDREQ_FLAGS_RESP_SDIO_R4,
+                                                pReq);
+            }
+            break;
+        case CARD_SD:
+            if (IS_HCD_BUS_MODE_SPI(pHcd)) {
+                    /* CMD58 is used to read the OCR */
+                status = _IssueSimpleBusRequest(pHcd,CMD58,
+                                                0, /* argument ignored */
+                                                (SDREQ_FLAGS_RESP_R3 | SDREQ_FLAGS_RESP_SKIP_SPI_FILT),
+                                                pReq);
+            } else {
+                    /* SD Native uses ACMD41 */
+                status = _IssueSimpleBusRequest(pHcd,ACMD41,
+                                                OCRValue,
+                                                SDREQ_FLAGS_APP_CMD | SDREQ_FLAGS_RESP_R3,
+                                                pReq);
+            }
+            break;
+        case CARD_MMC:
+            if (IS_HCD_BUS_MODE_SPI(pHcd)) {
+                    /* CMD58 is used to read the OCR  */
+                status = _IssueSimpleBusRequest(pHcd,CMD58,
+                                                0, /* argument ignored */
+                                                (SDREQ_FLAGS_RESP_R3 | SDREQ_FLAGS_RESP_SKIP_SPI_FILT),
+                                                pReq);
+            } else {
+                    /* MMC Native uses CMD1 */
+                status = _IssueSimpleBusRequest(pHcd,CMD1,
+                                                OCRValue, SDREQ_FLAGS_RESP_R3,
+                                                pReq);
+            }
+            break;
+        default:
+            DBG_ASSERT(FALSE);
+            break;
+    }
+
+    if (SDIO_SUCCESS(status) && (pOCRValueRd != NULL)) {
+        *pOCRValueRd = 0;
+            /* someone wants the OCR read back */
+        switch (ReadType) {
+            case CARD_SDIO:
+                if (IS_HCD_BUS_MODE_SPI(pHcd)) {
+                    *pOCRValueRd = SPI_SDIO_R4_GET_OCR(pReq->Response);
+                } else {
+                    *pOCRValueRd = SD_SDIO_R4_GET_OCR(pReq->Response);
+                }
+                break;
+            case CARD_SD:
+            case CARD_MMC:
+                if (IS_HCD_BUS_MODE_SPI(pHcd)) {
+                    *pOCRValueRd = SPI_R3_GET_OCR(pReq->Response);
+                } else {
+                    *pOCRValueRd = SD_R3_GET_OCR(pReq->Response);
+                }
+                break;
+            default:
+                DBG_ASSERT(FALSE);
+                break;
+        }
+    }
+    return status;
+}
+
+/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  PollCardReady - poll card till it's ready
+  Input:  pHcd - HCD object
+          OCRValue - OCR value to poll with
+          PollType - polling type (based on card type)
+  Output:
+  Return:
+  Notes:
+
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+SDIO_STATUS PollCardReady(PSDHCD pHcd, UINT32 OCRValue, CARD_INFO_FLAGS PollType)
+{
+    INT             cardReadyRetry;
+    SDIO_STATUS     status;
+    PSDREQUEST      pReq;
+
+    if (!((PollType == CARD_SDIO) || (PollType == CARD_SD) || (PollType == CARD_MMC))) {
+        DBG_ASSERT(FALSE);
+        return SDIO_STATUS_INVALID_PARAMETER;
+    }
+
+    pReq = AllocateRequest();
+    if (NULL == pReq) {
+        return SDIO_STATUS_NO_RESOURCES;
+    }
+
+    status = SDIO_STATUS_SUCCESS;
+    cardReadyRetry = pBusContext->CardReadyPollingRetry;
+    DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: Polling card ready, Using OCR:0x%8.8X, Poll Type:0x%X\n",
+                            OCRValue,PollType));
+
+        /* now issue CMD with the actual OCR as an argument until the card is ready */
+    while (cardReadyRetry) {
+        if (IS_HCD_BUS_MODE_SPI(pHcd) && !(PollType == CARD_SDIO)) {
+            if (PollType == CARD_MMC) {
+                /* under SPI mode for MMC cards, we need to issue CMD1 and
+                 * check the response for the "in-idle" bit */
+                status = _IssueSimpleBusRequest(pHcd,
+                                                CMD1,
+                                                0,
+                                                SDREQ_FLAGS_RESP_R1 | SDREQ_FLAGS_RESP_SKIP_SPI_FILT,
+                                                pReq);
+            } else if (PollType == CARD_SD) {
+                 /* under SPI mode for SD cards, we need to issue ACMD41 and
+                 * check the response for the "in-idle" bit */
+                 status = _IssueSimpleBusRequest(pHcd,
+                                                 ACMD41,
+                                                 0,
+                                                 SDREQ_FLAGS_RESP_R1 |
+                                                 SDREQ_FLAGS_APP_CMD |
+                                                 SDREQ_FLAGS_RESP_SKIP_SPI_FILT,
+                                                 pReq);
+            } else {
+                DBG_ASSERT(FALSE);
+            }
+        } else {
+                /* for SD/MMC in native mode and SDIO (all modes) we need to read the OCR register */
+                /* read the OCR using the supplied OCR value as an argument, we don't care about the
+                  * actual OCR read-back, but we are interested in the response */
+            status = ReadOCR(pHcd,PollType,pReq,OCRValue,NULL);
+        }
+
+        if (!SDIO_SUCCESS(status)) {
+            DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Failed to issue CMD to poll ready \n"));
+            break;
+        }
+        if (PollType == CARD_SDIO)  {
+            if (IS_HCD_BUS_MODE_SPI(pHcd)) {
+                if (SPI_SDIO_R4_IS_CARD_READY(pReq->Response)) {
+                    DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: SDIO Card Ready! (SPI) \n"));
+                    break;
+                }
+            } else {
+                if (SD_SDIO_R4_IS_CARD_READY(pReq->Response)) {
+                    DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: SDIO Card Ready! \n"));
+                    break;
+                }
+            }
+        } else if ((PollType == CARD_SD) || (PollType == CARD_MMC)) {
+            if (IS_HCD_BUS_MODE_SPI(pHcd)) {
+                    /* check response when MMC or SD cards operate in SPI mode */
+                if (!(GET_SPI_R1_RESP_TOKEN(pReq->Response) & SPI_CS_STATE_IDLE)) {
+                        /* card is no longer in idle */
+                    DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: SD/MMC Card (SPI mode) is ready! \n"));
+                    break;
+                }
+            } else {
+                    /* check the OCR busy bit */
+                if (SD_R3_IS_CARD_READY(pReq->Response)) {
+                    DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: SD/MMC (Native Mode) Card Ready! \n"));
+                    break;
+                }
+            }
+        } else {
+            DBG_ASSERT(FALSE);
+        }
+        cardReadyRetry--;
+            /* delay */
+        status = OSSleep(OCR_READY_CHECK_DELAY_MS);
+        if (!SDIO_SUCCESS(status)){
+            break;
+        }
+    }
+
+    if (0 == cardReadyRetry) {
+        DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Card Ready timeout! \n"));
+        status = SDIO_STATUS_DEVICE_ERROR;
+    }
+
+    FreeRequest(pReq);
+
+    return status;
+}
+
+/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  AdjustSlotPower - adjust slot power
+  Input:  pHcd - HCD object
+  Output: pOCRvalue - ocr value to use
+  Return:
+  Notes:
+
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+static SDIO_STATUS AdjustSlotPower(PSDHCD pHcd, UINT32 *pOCRvalue)
+{
+    SDCONFIG_POWER_CTRL_DATA    pwrSetting;
+    SDIO_STATUS                 status = SDIO_STATUS_SUCCESS;
+
+    ZERO_OBJECT(pwrSetting);
+    DBG_PRINT(SDDBG_TRACE,
+        ("SDIO Bus Driver: Adjusting Slot Power, Requesting adjustment for OCR:0x%8.8X \n",
+         *pOCRvalue));
+
+    do {
+        pwrSetting.SlotPowerEnable = TRUE;
+            /* get optimal power setting */
+        pwrSetting.SlotPowerVoltageMask = GetPowerSetting(pHcd, pOCRvalue);
+        if (0 == pwrSetting.SlotPowerVoltageMask) {
+            DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: No matching voltage for OCR \n"));
+            status = SDIO_STATUS_DEVICE_ERROR;
+            break;
+        }
+
+        DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: Slot Pwr Mask 0x%X for OCR:0x%8.8X \n",
+                                pwrSetting.SlotPowerVoltageMask,*pOCRvalue));
+        status = _IssueConfig(pHcd,SDCONFIG_POWER_CTRL,&pwrSetting,sizeof(pwrSetting));
+        if (!SDIO_SUCCESS(status)) {
+            DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Failed to set power in hcd \n"));
+            break;
+        }
+            /* delay for power to settle */
+        OSSleep(pBusContext->PowerSettleDelay);
+            /* save off for drivers */
+        pHcd->CardProperties.CardVoltage  = pwrSetting.SlotPowerVoltageMask;
+
+    } while (FALSE);
+
+    return status;
+}
+
+/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  ConvertEncodedTransSpeed - convert encoded TRANS_SPEED value to a clock rate
+  Input:  TransSpeedValue - encoded transfer speed value
+  Output:
+  Return: appropriate SD clock rate
+  Notes: This function returns a rate of 0, if it could not be determined.
+         This function can check tran speed values for SD,SDIO and MMC cards
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+static SD_BUSCLOCK_RATE ConvertEncodedTransSpeed(UINT8 TransSpeedValue)
+{
+    SD_BUSCLOCK_RATE transfMul = 0;
+    UINT8            timeVal = 0;
+
+    switch (TransSpeedValue & TRANSFER_UNIT_MULTIPIER_MASK) {
+        case 0:
+            transfMul = 10000;
+            break;
+        case 1:
+            transfMul = 100000;
+            break;
+        case 2:
+            transfMul = 1000000;
+            break;
+        case 3:
+            transfMul = 10000000;
+            break;
+        default:
+            transfMul = 0;
+            DBG_PRINT(SDDBG_WARN, ("SDIO Bus Driver: Card transfer multipler is wrong (val=0x%X)! \n",
+                                   TransSpeedValue));
+            break;
+    }
+
+    switch ((TransSpeedValue & TIME_VALUE_MASK) >> TIME_VALUE_SHIFT) {
+        case 1: timeVal = 10; break;
+        case 2: timeVal = 12; break;
+        case 3: timeVal = 13; break;
+        case 4: timeVal = 15; break;
+        case 5: timeVal = 20; break;
+        case 6: timeVal = 25; break;
+        case 7: timeVal = 30; break;
+        case 8: timeVal = 35; break;
+        case 9: timeVal = 40; break;
+        case 10: timeVal = 45; break;
+        case 11: timeVal = 50; break;
+        case 12: timeVal = 55; break;
+        case 13: timeVal = 60; break;
+        case 14: timeVal = 70; break;
+        case 15: timeVal = 80; break;
+        default: timeVal = 0;
+        DBG_PRINT(SDDBG_WARN, ("SDIO Bus Driver: Card time value is wrong (val=0x%X)! \n",
+                               TransSpeedValue));
+        break;
+    }
+
+    if ((transfMul != 0) && (timeVal != 0)) {
+        DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: Card Reported Max: %d Hz (0x%X) \n",
+                                (timeVal*transfMul), TransSpeedValue));
+        return timeVal*transfMul;
+    }
+
+    return 0;
+}
+
+/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  SelectDeselectCard - Select or deselect a card
+  Input:  pHcd - HCD object
+          Select - select the card
+  Output:
+  Return: status
+  Notes:
+
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+static SDIO_STATUS SelectDeselectCard(PSDHCD pHcd, BOOL Select)
+{
+    SDIO_STATUS status;
+
+    if (IS_HCD_BUS_MODE_SPI(pHcd)) {
+            /* SPI mode cards do not support selection */
+        status = SDIO_STATUS_SUCCESS;
+    } else {
+        if (!Select) {
+                /* deselect, note that deselecting a card does not return a response */
+            status = _IssueSimpleBusRequest(pHcd,
+                                            CMD7,0,
+                                            SDREQ_FLAGS_NO_RESP,NULL);
+        } else {
+                /* select */
+            status = _IssueSimpleBusRequest(pHcd,
+                                            CMD7,(pHcd->CardProperties.RCA << 16),
+                                            SDREQ_FLAGS_RESP_R1B,NULL);
+        }
+    }
+
+    if (!SDIO_SUCCESS(status)) {
+        DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: Failed to %s card, RCA:0x%X Err:%d \n",
+            (Select ? "Select":"Deselect"), pHcd->CardProperties.RCA, status));
+    }
+    return status;
+}
+
+/* reorder a buffer by swapping MSB with LSB */
+static void ReorderBuffer(UINT8 *pBuffer, INT Bytes)
+{
+    UINT8 *pEnd;
+    UINT8 temp;
+
+    DBG_ASSERT(!(Bytes & 1));
+        /* point to the end */
+    pEnd = &pBuffer[Bytes - 1];
+        /* divide in half */
+    Bytes = Bytes >> 1;
+
+    while (Bytes) {
+        temp = *pBuffer;
+            /* swap bytes */
+        *pBuffer = *pEnd;
+        *pEnd = temp;
+        pBuffer++;
+        pEnd--;
+        Bytes--;
+    }
+}
+
+#define ADJUST_OPER_CLOCK(pBusMode,Clock) \
+    (pBusMode)->ClockRate = min((SD_BUSCLOCK_RATE)(Clock),(pBusMode)->ClockRate)
+#define ADJUST_OPER_BLOCK_LEN(pCaps,Length) \
+    (pCaps)->OperBlockLenLimit = min((UINT16)(Length),(pCaps)->OperBlockLenLimit)
+#define ADJUST_OPER_BLOCK_COUNT(pCaps,Count) \
+    (pCaps)->OperBlockCountLimit = min((UINT16)(Count),(pCaps)->OperBlockCountLimit)
+
+/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  GetBusParameters - Get bus parameters for a card
+  Input:  pHcd - HCD object
+          pBusMode - current bus mode on entry
+  Output: pBusMode - new adjusted bus mode
+  Return: status
+  Notes:
+
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+static SDIO_STATUS GetBusParameters(PSDHCD pHcd, PSDCONFIG_BUS_MODE_DATA pBusMode)
+{
+    SDIO_STATUS                        status = SDIO_STATUS_SUCCESS;
+    UINT8                              temp;
+    UINT32                             tplAddr;
+    struct SDIO_FUNC_EXT_COMMON_TPL    func0ext;
+    UINT8                              scrRegister[SD_SCR_BYTES];
+    SD_BUSCLOCK_RATE                   cardReportedRate = 0;
+    PSDREQUEST                         pReq = NULL;
+    BOOL                               spiMode = FALSE;
+
+
+    if (SDCONFIG_GET_BUSWIDTH(pBusMode->BusModeFlags) == SDCONFIG_BUS_WIDTH_SPI) {
+        spiMode = TRUE;
+    }
+
+    if (!spiMode) {
+            /* set highest bus mode bus driver is allowing (non-SPI), the code below will
+               * adjust to lower or equal settings */
+        pBusMode->BusModeFlags = pBusContext->DefaultBusMode;
+    }
+        /* set operational parameters */
+    pBusMode->ClockRate = pBusContext->DefaultOperClock;
+    pHcd->CardProperties.OperBlockLenLimit = pBusContext->DefaultOperBlockLen;
+    pHcd->CardProperties.OperBlockCountLimit = pBusContext->DefaultOperBlockCount;
+
+        /* adjust operational block counts and length to match HCD */
+    ADJUST_OPER_BLOCK_LEN(&pHcd->CardProperties,pHcd->MaxBytesPerBlock);
+    ADJUST_OPER_BLOCK_COUNT(&pHcd->CardProperties,pHcd->MaxBlocksPerTrans);
+        /* limit operational clock to the max clock rate */
+    ADJUST_OPER_CLOCK(pBusMode,pHcd->MaxClockRate);
+
+    if (!spiMode) {
+            /* check HCD bus mode */
+        if (!(pHcd->Attributes & SDHCD_ATTRIB_BUS_4BIT) ||
+            ((pHcd->CardProperties.Flags & CARD_SDIO) &&
+             (pHcd->Attributes & SDHCD_ATTRIB_NO_4BIT_IRQ)) ) {
+
+            if (pHcd->Attributes & SDHCD_ATTRIB_BUS_4BIT) {
+                DBG_PRINT(SDDBG_WARN,
+                ("SDIO Card Detected, but host does not support IRQs in 4 bit mode - dropping to 1 bit. \n"));
+            }
+                /* force to 1 bit mode */
+            SDCONFIG_SET_BUS_WIDTH(pBusMode->BusModeFlags, SDCONFIG_BUS_WIDTH_1_BIT);
+        }
+    }
+
+        /* now do various card inquiries to drop the bus mode or clock
+         * none of these checks can raise the bus mode or clock higher that what
+         * was initialized above */
+    do {
+        if (pHcd->CardProperties.Flags & (CARD_SD | CARD_MMC)) {
+                /* allocate a request for response data we'll need */
+            pReq = AllocateRequest();
+            if (NULL == pReq) {
+                status = SDIO_STATUS_NO_RESOURCES;
+                break;
+            }
+        }
+
+        if (!spiMode && (pHcd->CardProperties.Flags & CARD_MMC)) {
+                /* MMC cards all run in 1 bit mode */
+            SDCONFIG_SET_BUS_WIDTH(pBusMode->BusModeFlags, SDCONFIG_BUS_WIDTH_1_BIT);
+        }
+
+        if (pHcd->CardProperties.Flags & CARD_SD) {
+            DBG_ASSERT(pReq != NULL);
+            DBG_PRINT(SDDBG_TRACE, ("Getting SCR from SD Card..\n"));
+                /* read SCR (requires data transfer) to get supported modes */
+            status = _IssueBusRequestBd(pHcd,ACMD51,0,
+                                        SDREQ_FLAGS_RESP_R1 | SDREQ_FLAGS_APP_CMD |
+                                        SDREQ_FLAGS_DATA_TRANS,
+                                        pReq,&scrRegister,SD_SCR_BYTES);
+            if (!SDIO_SUCCESS(status)) {
+                DBG_PRINT(SDDBG_WARN, ("SD card does not have SCR. \n"));
+                if (!spiMode) {
+                        /* switch it to 1 bit mode */
+                    SDCONFIG_SET_BUS_WIDTH(pBusMode->BusModeFlags, SDCONFIG_BUS_WIDTH_1_BIT);
+                }
+                status = SDIO_STATUS_SUCCESS;
+            } else {
+                    /* we have to reorder this buffer since the SCR is sent MSB first on the data
+                     * data bus */
+                ReorderBuffer(scrRegister,SD_SCR_BYTES);
+                    /* got the SCR */
+                DBG_PRINT(SDDBG_TRACE, ("SD SCR StructRev:0x%X, Flags:0x%X \n",
+                        GET_SD_SCR_STRUCT_VER(scrRegister),
+                        GET_SD_SCR_BUSWIDTHS_FLAGS(scrRegister)));
+                    /* set the revision */
+                switch (GET_SD_SCR_SDSPEC_VER(scrRegister)) {
+                    case SCR_SD_SPEC_1_00:
+                        DBG_PRINT(SDDBG_TRACE, ("SD Spec Revision 1.01 \n"));
+                        pHcd->CardProperties.SD_MMC_Revision = SD_REVISION_1_01;
+                        break;
+                    case SCR_SD_SPEC_1_10:
+                        DBG_PRINT(SDDBG_TRACE, ("SD Spec Revision 1.10 \n"));
+                        pHcd->CardProperties.SD_MMC_Revision = SD_REVISION_1_10;
+                        break;
+                    default:
+                        DBG_PRINT(SDDBG_WARN, ("SD Spec Revision is greater than 1.10 \n"));
+                        pHcd->CardProperties.SD_MMC_Revision = SD_REVISION_1_10;
+                        break;
+                }
+
+                if (!(GET_SD_SCR_BUSWIDTHS(scrRegister) & SCR_BUS_SUPPORTS_4_BIT)) {
+                    if (!spiMode) {
+                        DBG_PRINT(SDDBG_WARN, ("SD SCR reports 1bit only Mode \n"));
+                            /* switch it to 1 bit mode */
+                        SDCONFIG_SET_BUS_WIDTH(pBusMode->BusModeFlags, SDCONFIG_BUS_WIDTH_1_BIT);
+                    }
+                }
+            }
+        }
+
+        if (pHcd->CardProperties.Flags & (CARD_SD | CARD_MMC)) {
+            DBG_ASSERT(pReq != NULL);
+                /* de-select the card in order to get the CSD */
+            status = SelectDeselectCard(pHcd,FALSE);
+            if (!SDIO_SUCCESS(status)) {
+                DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Failed to deselect card before getting CSD \n"));
+                break;
+            }
+                /* Get CSD for SD or MMC cards */
+            if (spiMode) {
+                    /* in SPI mode, getting the CSD requires a read data transfer */
+                status = _IssueBusRequestBd(pHcd,CMD9,0,
+                                            SDREQ_FLAGS_RESP_R1 | SDREQ_FLAGS_DATA_TRANS,
+                                            pReq,
+                                            pHcd->CardProperties.CardCSD,
+                                            MAX_CSD_CID_BYTES);
+                if (SDIO_SUCCESS(status)) {
+                        /* when the CSD is sent over in SPI data mode, it comes to us in MSB first
+                         * and thus is not ordered correctly as defined in the SD spec */
+                    ReorderBuffer(pHcd->CardProperties.CardCSD,MAX_CSD_CID_BYTES);
+                }
+            } else {
+                status = _IssueSimpleBusRequest(pHcd,
+                                                CMD9,
+                                                (pHcd->CardProperties.RCA << 16),
+                                                SDREQ_FLAGS_RESP_R2,
+                                                pReq);
+                if (SDIO_SUCCESS(status)) {
+                        /* save the CSD */
+                    memcpy(pHcd->CardProperties.CardCSD,pReq->Response,MAX_CARD_RESPONSE_BYTES);
+                }
+            }
+
+            if (!SDIO_SUCCESS(status)) {
+                DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Failed to get CSD, Err:%d \n",
+                                        status));
+                break;
+            }
+                /* for MMC cards, the spec version is in the CSD */
+            if (pHcd->CardProperties.Flags & CARD_MMC) {
+                DBG_PRINT(SDDBG_TRACE, ("MMC Spec version : (0x%2.2X) \n",
+                            GET_MMC_SPEC_VERSION(pHcd->CardProperties.CardCSD)));
+                switch (GET_MMC_SPEC_VERSION(pHcd->CardProperties.CardCSD)) {
+                    case MMC_SPEC_1_0_TO_1_2:
+                    case MMC_SPEC_1_4:
+                    case MMC_SPEC_2_0_TO_2_2:
+                        DBG_PRINT(SDDBG_WARN, ("MMC Spec version less than 3.1 \n"));
+                        pHcd->CardProperties.SD_MMC_Revision = MMC_REVISION_1_0_2_2;
+                        break;
+                    case MMC_SPEC_3_1:
+                        DBG_PRINT(SDDBG_TRACE, ("MMC Spec version 3.1 \n"));
+                        pHcd->CardProperties.SD_MMC_Revision = MMC_REVISION_3_1;
+                        break;
+                    case MMC_SPEC_4_0_TO_4_1:
+                        DBG_PRINT(SDDBG_TRACE, ("MMC Spec version 4.0-4.1 \n"));
+                        pHcd->CardProperties.SD_MMC_Revision = MMC_REVISION_4_0;
+                        break;
+                    default:
+                        pHcd->CardProperties.SD_MMC_Revision = MMC_REVISION_3_1;
+                        DBG_PRINT(SDDBG_WARN, ("MMC Spec version greater than 4.1\n"));
+                        break;
+                }
+            }
+                /* re-select the card  */
+            status = SelectDeselectCard(pHcd,TRUE);
+            if (!SDIO_SUCCESS(status)) {
+                DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Failed to re-select card after getting CSD \n"));
+                break;
+            }
+        }
+
+        if ((pHcd->CardProperties.Flags & CARD_SD) &&
+            !(pHcd->CardProperties.Flags & CARD_SDIO) &&
+             SDDEVICE_IS_SD_REV_GTEQ_1_10(pHcd->pPseudoDev) &&
+             (pHcd->Attributes & SDHCD_ATTRIB_SD_HIGH_SPEED) &&
+             !spiMode)  {
+            UINT32 arg;
+            PUINT8 pSwitchStatusBlock = KernelAlloc(SD_SWITCH_FUNC_STATUS_BLOCK_BYTES);
+
+            if (NULL == pSwitchStatusBlock) {
+                status = SDIO_STATUS_NO_RESOURCES;
+                break;
+            }
+
+            arg = SD_SWITCH_FUNC_ARG_GROUP_CHECK(SD_SWITCH_HIGH_SPEED_GROUP,
+                                                 SD_SWITCH_HIGH_SPEED_FUNC_NO);
+
+                /* for 1.10 SD cards, check if high speed mode is supported */
+            DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: Checking SD Card for switchable functions (CMD6 arg:0x%X)\n",arg));
+
+                /* issue simple data transfer request to read the switch status */
+            status = _IssueBusRequestBd(pHcd,
+                                        CMD6,
+                                        arg,
+                                        SDREQ_FLAGS_RESP_R1 | SDREQ_FLAGS_DATA_TRANS,
+                                        pReq,
+                                        pSwitchStatusBlock,
+                                        SD_SWITCH_FUNC_STATUS_BLOCK_BYTES);
+
+            if (SDIO_SUCCESS(status)) {
+                UINT16 switchGroupMask;
+                    /* need to reorder this since cards send this MSB first */
+                ReorderBuffer(pSwitchStatusBlock,SD_SWITCH_FUNC_STATUS_BLOCK_BYTES);
+                switchGroupMask = SD_SWITCH_FUNC_STATUS_GET_GRP_BIT_MASK(pSwitchStatusBlock,SD_SWITCH_HIGH_SPEED_GROUP);
+                DBG_PRINT(SDDBG_TRACE, ("SD Card Switch Status Group1 Mask:0x%X Max Current:%d\n",
+                        switchGroupMask, SD_SWITCH_FUNC_STATUS_GET_MAX_CURRENT(pSwitchStatusBlock) ));
+                if (SD_SWITCH_FUNC_STATUS_GET_MAX_CURRENT(pSwitchStatusBlock) == 0) {
+                    DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: SD Switch Status block has zero max current \n"));
+                    SDLIB_PrintBuffer(pSwitchStatusBlock,
+                                      SD_SWITCH_FUNC_STATUS_BLOCK_BYTES,
+                                      "SDIO Bus Driver: SD Switch Status Block Error");
+                } else {
+                        /* check HS support */
+                    if (switchGroupMask & (1 << SD_SWITCH_HIGH_SPEED_FUNC_NO)) {
+                        DBG_PRINT(SDDBG_TRACE, ("SD Card Supports High Speed Mode\n"));
+                            /* set the rate, this will override the CSD value */
+                        cardReportedRate = SD_HS_MAX_BUS_CLOCK;
+                        pBusMode->BusModeFlags |= SDCONFIG_BUS_MODE_SD_HS;
+                    }
+                }
+            } else {
+                DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Failed to get SD Switch Status block (%d)\n", status));
+                    /* just fall through, we'll handle this like a normal SD card */
+                status = SDIO_STATUS_SUCCESS;
+            }
+
+            KernelFree(pSwitchStatusBlock);
+        }
+
+        if ((pHcd->CardProperties.Flags & CARD_MMC) &&
+             SDDEVICE_IS_MMC_REV_GTEQ_4_0(pHcd->pPseudoDev) &&
+             (pHcd->Attributes & SDHCD_ATTRIB_MMC_HIGH_SPEED) &&
+             !spiMode)  {
+                /* for MMC cards, get the Extended CSD to get the High speed and
+                 * wide bus paramaters */
+
+            PUINT8 pExtData = KernelAlloc(MMC_EXT_CSD_SIZE);
+
+            if (NULL == pExtData) {
+                status = SDIO_STATUS_NO_RESOURCES;
+                break;
+            }
+                /* issue simple data transfer request to read the extended CSD */
+            status = _IssueBusRequestBd(pHcd,MMC_CMD8,0,
+                                        SDREQ_FLAGS_RESP_R1 | SDREQ_FLAGS_DATA_TRANS,
+                                        pReq,
+                                        pExtData,
+                                        MMC_EXT_CSD_SIZE);
+            if (SDIO_SUCCESS(status)) {
+                 DBG_PRINT(SDDBG_TRACE, ("MMC Ext CSD Version: 0x%X Card Type: 0x%X\n",
+                        pExtData[MMC_EXT_VER_OFFSET],pExtData[MMC_EXT_CARD_TYPE_OFFSET]));
+                    /* check HS support */
+                if (pExtData[MMC_EXT_CARD_TYPE_OFFSET] & MMC_EXT_CARD_TYPE_HS_52) {
+                        /* try 52 Mhz */
+                    cardReportedRate = 52000000;
+                    pBusMode->BusModeFlags |= SDCONFIG_BUS_MODE_MMC_HS;
+                } else if (pExtData[MMC_EXT_CARD_TYPE_OFFSET] & MMC_EXT_CARD_TYPE_HS_26) {
+                        /* try 26MHZ */
+                    cardReportedRate = 26000000;
+                    pBusMode->BusModeFlags |= SDCONFIG_BUS_MODE_MMC_HS;
+                } else {
+                        /* doesn't report high speed capable */
+                    cardReportedRate = 0;
+                }
+
+                if (cardReportedRate && !spiMode) {
+                        /* figure out the bus mode */
+                    if (pHcd->Attributes & SDHCD_ATTRIB_BUS_MMC8BIT) {
+                        SDCONFIG_SET_BUS_WIDTH(pBusMode->BusModeFlags, SDCONFIG_BUS_WIDTH_MMC8_BIT);
+                    } else if (pHcd->Attributes & SDHCD_ATTRIB_BUS_4BIT) {
+                        SDCONFIG_SET_BUS_WIDTH(pBusMode->BusModeFlags, SDCONFIG_BUS_WIDTH_4_BIT);
+                    } else {
+                        /* we leave it to default to 1 bit mode */
+                    }
+                }
+            } else {
+                DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Failed to get MMC Extended CSD \n"));
+                    /* just fall through, we'll do without the extended information
+                     * and run it like a legacy MMC card */
+                status = SDIO_STATUS_SUCCESS;
+            }
+
+            KernelFree(pExtData);
+        }
+
+        if (pHcd->CardProperties.Flags & (CARD_SD | CARD_MMC)) {
+
+            if (0 == cardReportedRate) {
+                    /* extract rate from CSD only if it was not set by earlier tests */
+                cardReportedRate = ConvertEncodedTransSpeed(
+                                GET_SD_CSD_TRANS_SPEED(pHcd->CardProperties.CardCSD));
+                    /* fall through and test for zero again */
+            }
+
+            if (cardReportedRate != 0) {
+                     /* adjust clock based on what the card can handle */
+                ADJUST_OPER_CLOCK(pBusMode,cardReportedRate);
+            } else {
+                    /* something is wrong with the CSD */
+                if (DBG_GET_DEBUG_LEVEL() >= SDDBG_TRACE) {
+                    SDLIB_PrintBuffer(pHcd->CardProperties.CardCSD,
+                                      MAX_CARD_RESPONSE_BYTES,
+                                      "SDIO Bus Driver: CSD Dump");
+                }
+                    /* can't figure out the card rate, so set reasonable defaults */
+                if (pHcd->CardProperties.Flags & CARD_SD) {
+                    ADJUST_OPER_CLOCK(pBusMode,SD_MAX_BUS_CLOCK);
+                } else {
+                    ADJUST_OPER_CLOCK(pBusMode,MMC_MAX_BUS_CLOCK);
+                }
+            }
+        }
+
+            /* note, we do SDIO card "after" SD in case this is a combo card */
+        if (pHcd->CardProperties.Flags & CARD_SDIO) {
+                /* read card capabilities */
+            status = Cmd52ReadByteCommon(pHcd->pPseudoDev,
+                                         SDIO_CARD_CAPS_REG,
+                                         &pHcd->CardProperties.SDIOCaps);
+            if (!SDIO_SUCCESS(status)) {
+                break;
+            }
+            DBG_PRINT(SDDBG_TRACE, ("SDIO Card Caps: 0x%X \n",pHcd->CardProperties.SDIOCaps));
+            if (pHcd->CardProperties.SDIOCaps & SDIO_CAPS_LOW_SPEED) {
+                    /* adjust max clock for LS device */
+                ADJUST_OPER_CLOCK(pBusMode,SDIO_LOW_SPEED_MAX_BUS_CLOCK);
+                    /* adjust bus if LS device does not support 4 bit mode */
+                if (!(pHcd->CardProperties.SDIOCaps & SDIO_CAPS_4BIT_LS)) {
+                    if (!spiMode) {
+                            /* low speed device does not support 4 bit mode, force us to 1 bit */
+                        SDCONFIG_SET_BUS_WIDTH(pBusMode->BusModeFlags,
+                                               SDCONFIG_BUS_WIDTH_1_BIT);
+                    }
+                }
+            }
+
+                /* check if 1.2 card supports high speed mode, checking HCD as well*/
+            if (SDDEVICE_IS_SDIO_REV_GTEQ_1_20(pHcd->pPseudoDev) &&
+                (pHcd->Attributes & SDHCD_ATTRIB_SD_HIGH_SPEED) &&
+                !spiMode) {
+                UCHAR hsControl = 0;
+
+                status = Cmd52ReadByteCommon(pHcd->pPseudoDev,
+                                             SDIO_HS_CONTROL_REG,
+                                             &hsControl);
+
+                if (!SDIO_SUCCESS(status)) {
+                    DBG_PRINT(SDDBG_TRACE,
+                        ("SDIO Failed to read high speed control (%d) \n",status));
+                        /* reset status and continue */
+                    status = SDIO_STATUS_SUCCESS;
+                } else {
+                    if (hsControl & SDIO_HS_CONTROL_SHS) {
+                        DBG_PRINT(SDDBG_TRACE, ("SDIO Card Supports High Speed Mode\n"));
+                        pBusMode->BusModeFlags |= SDCONFIG_BUS_MODE_SD_HS;
+                    }
+                }
+
+            }
+
+            cardReportedRate = 0;
+            temp = sizeof(func0ext);
+            tplAddr = pHcd->CardProperties.CommonCISPtr;
+                /* get the FUNCE tuple */
+            status = SDLIB_FindTuple(pHcd->pPseudoDev,
+                                     CISTPL_FUNCE,
+                                     &tplAddr,
+                                     (PUINT8)&func0ext,
+                                     &temp);
+            if (!SDIO_SUCCESS(status) || (temp < sizeof(func0ext))) {
+                DBG_PRINT(SDDBG_WARN, ("SDIO Function 0 Ext. Tuple Missing (Got size:%d) \n", temp));
+                    /* reset status */
+                status = SDIO_STATUS_SUCCESS;
+            } else {
+                    /* convert encoded value to rate */
+                cardReportedRate = ConvertEncodedTransSpeed(func0ext.MaxTransSpeed);
+            }
+
+            if (cardReportedRate != 0) {
+                if (pBusMode->BusModeFlags & SDCONFIG_BUS_MODE_SD_HS) {
+                    if (cardReportedRate <= SD_MAX_BUS_CLOCK) {
+                        DBG_PRINT(SDDBG_WARN,
+                            ("SDIO Function tuple reports clock:%d Hz, with advertised High Speed support \n", cardReportedRate));
+                            /* back off high speed support */
+                        pBusMode->BusModeFlags &= ~SDCONFIG_BUS_MODE_SD_HS;
+                    }
+                } else {
+                    if (cardReportedRate > SD_MAX_BUS_CLOCK) {
+                        DBG_PRINT(SDDBG_WARN,
+                            ("SDIO Function tuple reports clock:%d Hz, without advertising High Speed support..using 25Mhz \n", cardReportedRate));
+                        cardReportedRate = SD_MAX_BUS_CLOCK;
+                    }
+                }
+                    /* adjust clock based on what the card can handle */
+                ADJUST_OPER_CLOCK(pBusMode,cardReportedRate);
+
+            } else {
+                    /* set a reasonable default */
+                ADJUST_OPER_CLOCK(pBusMode,SD_MAX_BUS_CLOCK);
+            }
+        }
+    } while (FALSE);
+
+    if (pReq != NULL) {
+        FreeRequest(pReq);
+    }
+    return status;
+}
+
+/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  SetOperationalBusMode - set operational bus mode
+  Input:  pDevice - pDevice that is requesting the change
+          pBusMode - operational bus mode
+  Output: pBusMode - on return will have the actual clock rate set
+  Return: status
+  Notes:
+
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+SDIO_STATUS SetOperationalBusMode(PSDDEVICE                pDevice,
+                                  PSDCONFIG_BUS_MODE_DATA  pBusMode)
+{
+    SDIO_STATUS     status = SDIO_STATUS_SUCCESS;
+    UCHAR           regData;
+    UINT32          arg;
+    UINT32          switcharg;
+    PSDHCD          pHcd = pDevice->pHcd;
+
+        /* synchronize access for updating bus mode settings */
+    status = SemaphorePendInterruptable(&pDevice->pHcd->ConfigureOpsSem);
+    if (!SDIO_SUCCESS(status)) {
+        return status;
+    }
+
+    do {
+
+        if (!IS_CARD_PRESENT(pHcd)) {
+                /* for an empty slot (a Pseudo dev was passed in) we still allow the
+                 * bus mode to be set for the card detect
+                 * polling */
+            status = _IssueConfig(pHcd,SDCONFIG_BUS_MODE_CTRL,pBusMode,sizeof(SDCONFIG_BUS_MODE_DATA));
+            if (!SDIO_SUCCESS(status)) {
+                DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Failed to set bus mode in hcd : Err:%d \n",
+                                        status));
+            }
+                /* nothing more to do */
+            break;
+        }
+
+
+        if ((pBusMode->BusModeFlags == SDDEVICE_GET_BUSMODE_FLAGS(pDevice)) &&
+            (pBusMode->ClockRate == SDDEVICE_GET_OPER_CLOCK(pDevice))) {
+            DBG_PRINT(SDDBG_TRACE,
+               ("SDIO Bus Driver: Bus mode already set, nothing to do\n"));
+            pBusMode->ActualClockRate = SDDEVICE_GET_OPER_CLOCK(pDevice);
+            break;
+        }
+
+        if (pBusMode->BusModeFlags & SDCONFIG_BUS_MODE_MMC_HS) {
+            if (!(pHcd->Attributes & SDHCD_ATTRIB_MMC_HIGH_SPEED)) {
+                status = SDIO_STATUS_INVALID_PARAMETER;
+                DBG_PRINT(SDDBG_ERROR,
+                        ("SDIO Bus Driver: HCD does not support MMC High Speed\n"));
+                break;
+            }
+        }
+
+        if (pBusMode->BusModeFlags & SDCONFIG_BUS_MODE_SD_HS) {
+            if (!(pHcd->Attributes & SDHCD_ATTRIB_SD_HIGH_SPEED)) {
+                status = SDIO_STATUS_INVALID_PARAMETER;
+                DBG_PRINT(SDDBG_ERROR,
+                        ("SDIO Bus Driver: HCD does not support SD High Speed\n"));
+                break;
+            }
+        }
+
+            /* before we set the operational clock and mode, configure the clock for high
+             * speed mode on the card , if necessary */
+        if ((pHcd->CardProperties.Flags & CARD_MMC) &&
+            (pBusMode->BusModeFlags & SDCONFIG_BUS_MODE_MMC_HS) &&
+            !(SDDEVICE_GET_BUSMODE_FLAGS(pDevice) & SDCONFIG_BUS_MODE_MMC_HS)) {
+
+            switcharg = MMC_SWITCH_BUILD_ARG(MMC_SWITCH_CMD_SET0,
+                                             MMC_SWITCH_WRITE_BYTE,
+                                             MMC_EXT_HS_TIMING_OFFSET,
+                                             MMC_EXT_HS_TIMING_ENABLE);
+            status = _IssueSimpleBusRequest(pHcd,
+                                            MMC_CMD_SWITCH,
+                                            switcharg,
+                                            SDREQ_FLAGS_RESP_R1B,
+                                            NULL);
+            if (!SDIO_SUCCESS(status)) {
+                DBG_PRINT(SDDBG_ERROR,
+                 ("SDIO Bus Driver: Failed to switch MMC High Speed Mode (arg:0x%X): %d \n",
+                                        switcharg, status));
+                break;
+            }
+
+            DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: High Speed MMC enabled (arg:0x%X)\n",
+                switcharg));
+        }
+
+            /* before setting bus mode and clock in the HCD, switch card to high speed mode
+             * if necessary */
+        if ((pHcd->CardProperties.Flags & CARD_SD) &&
+            (pBusMode->BusModeFlags & SDCONFIG_BUS_MODE_SD_HS) &&
+            !(SDDEVICE_GET_BUSMODE_FLAGS(pDevice) & SDCONFIG_BUS_MODE_SD_HS)) {
+            UINT32     arg;
+            PUINT8     pSwitchStatusBlock;
+
+            pSwitchStatusBlock = KernelAlloc(SD_SWITCH_FUNC_STATUS_BLOCK_BYTES);
+
+            if (NULL == pSwitchStatusBlock) {
+                status = SDIO_STATUS_NO_RESOURCES;
+                break;
+            }
+
+                /* set high speed group */
+            arg = SD_SWITCH_FUNC_ARG_GROUP_SET(SD_SWITCH_HIGH_SPEED_GROUP,
+                                               SD_SWITCH_HIGH_SPEED_FUNC_NO);
+
+            DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: Setting SD Card for High Speed mode (CMD6 arg:0x%X)\n",arg));
+
+                /* issue simple data transfer request to switch modes */
+            status = _IssueBusRequestBd(pHcd,
+                                        CMD6,
+                                        arg,
+                                        SDREQ_FLAGS_RESP_R1 | SDREQ_FLAGS_DATA_TRANS,
+                                        NULL,
+                                        pSwitchStatusBlock,
+                                        SD_SWITCH_FUNC_STATUS_BLOCK_BYTES);
+
+            if (SDIO_SUCCESS(status)) {
+                ReorderBuffer(pSwitchStatusBlock,SD_SWITCH_FUNC_STATUS_BLOCK_BYTES);
+                DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: SD High Speed Result, Got Max Current:%d mA, SwitchResult:0x%X \n",
+                      SD_SWITCH_FUNC_STATUS_GET_MAX_CURRENT(pSwitchStatusBlock),
+                      SDSwitchGetSwitchResult(pSwitchStatusBlock, SD_SWITCH_HIGH_SPEED_GROUP)));
+                if (SD_SWITCH_FUNC_STATUS_GET_MAX_CURRENT(pSwitchStatusBlock) == 0) {
+                    DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Error in Status Block after High Speed Switch (current==0) \n"));
+                    status = SDIO_STATUS_DEVICE_ERROR;
+                }
+                if (SDSwitchGetSwitchResult(pSwitchStatusBlock, SD_SWITCH_HIGH_SPEED_GROUP) !=
+                    SD_SWITCH_HIGH_SPEED_FUNC_NO) {
+                    DBG_PRINT(SDDBG_ERROR,
+                        ("SDIO Bus Driver: Error in Status Block after High Speed Switch (Group1 did not switch) \n"));
+                    status = SDIO_STATUS_DEVICE_ERROR;
+                }
+                if (SDIO_SUCCESS(status)) {
+                    DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: SD High Speed Mode Enabled \n"));
+                } else {
+                    SDLIB_PrintBuffer(pSwitchStatusBlock,
+                                      SD_SWITCH_FUNC_STATUS_BLOCK_BYTES,
+                                       "SDIO Bus Driver: SD Switch Status Block Error");
+                }
+            } else {
+                DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Failed to Set SD High Speed Mode (%d) \n",status));
+            }
+            KernelFree(pSwitchStatusBlock);
+
+            if (!SDIO_SUCCESS(status)) {
+                break;
+            }
+        }
+
+            /* enable/disable high speed mode for SDIO card */
+        if (pHcd->CardProperties.Flags & CARD_SDIO) {
+            BOOL doSet = TRUE;
+
+            if ((pBusMode->BusModeFlags & SDCONFIG_BUS_MODE_SD_HS) &&
+                !(SDDEVICE_GET_BUSMODE_FLAGS(pDevice) & SDCONFIG_BUS_MODE_SD_HS)) {
+                    /* enable */
+                regData = SDIO_HS_CONTROL_EHS;
+            } else if (!(pBusMode->BusModeFlags & SDCONFIG_BUS_MODE_SD_HS) &&
+                       (SDDEVICE_GET_BUSMODE_FLAGS(pDevice) & SDCONFIG_BUS_MODE_SD_HS)) {
+                    /* disable */
+                regData = 0;
+            } else {
+                    /* do nothing */
+                doSet = FALSE;
+            }
+
+            if (doSet) {
+                status = Cmd52WriteByteCommon(pDevice,
+                                              SDIO_HS_CONTROL_REG,
+                                              &regData);
+
+                if (!SDIO_SUCCESS(status)) {
+                    DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Failed to %s HS mode in SDIO card : Err:%d\n",
+                                            (SDIO_HS_CONTROL_EHS == regData) ? "enable":"disable" , status));
+                    break;
+                } else {
+                    DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver:SDIO Card %s for High Speed mode \n",
+                                    (SDIO_HS_CONTROL_EHS == regData) ? "enabled":"disabled" ));
+                }
+            }
+        }
+
+            /* use synchronize-with-bus request version, this may have been requested by a
+             * function driver */
+        status = SDLIB_IssueConfig(pDevice,
+                                   SDCONFIG_BUS_MODE_CTRL,
+                                   pBusMode,
+                                   sizeof(SDCONFIG_BUS_MODE_DATA));
+
+        if (!SDIO_SUCCESS(status)) {
+            DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Failed to set bus mode in hcd : Err:%d \n",
+                                    status));
+            break;
+        }
+
+             /* check requested bus width against the current mode */
+        if (SDCONFIG_GET_BUSWIDTH(pBusMode->BusModeFlags) ==
+                SDCONFIG_GET_BUSWIDTH(pHcd->CardProperties.BusMode)) {
+            DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: Bus mode set, no width change\n"));
+            break;
+        }
+
+        if (SDCONFIG_GET_BUSWIDTH(pBusMode->BusModeFlags) == SDCONFIG_BUS_WIDTH_SPI) {
+                /* nothing more to do for SPI */
+            break;
+        }
+
+            /* set the bus width for SD and combo cards */
+        if (pHcd->CardProperties.Flags & CARD_SD) {
+            if (SDCONFIG_GET_BUSWIDTH(pBusMode->BusModeFlags) == SDCONFIG_BUS_WIDTH_4_BIT) {
+                    /* turn off card detect resistor */
+                status = _IssueSimpleBusRequest(pHcd,
+                                                ACMD42,
+                                                0, /* disable CD */
+                                                SDREQ_FLAGS_APP_CMD | SDREQ_FLAGS_RESP_R1,
+                                                NULL);
+                if (!SDIO_SUCCESS(status)) {
+                    DBG_PRINT(SDDBG_WARN, ("SDIO Bus Driver: Failed to disable CD Res: %d \n",
+                                           status)); /* this should be okay */
+                }
+                arg = SD_ACMD6_BUS_WIDTH_4_BIT;
+            } else {
+                    /* don't need to turn off CD in 1 bit mode, just set mode */
+                arg = SD_ACMD6_BUS_WIDTH_1_BIT;
+
+            }
+                /* set the bus width */
+            status = _IssueSimpleBusRequest(pHcd,
+                                            ACMD6,
+                                            arg, /* set bus mode */
+                                            SDREQ_FLAGS_APP_CMD | SDREQ_FLAGS_RESP_R1,
+                                            NULL);
+            if (!SDIO_SUCCESS(status)) {
+                DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Failed to set bus width: %d \n",
+                                        status));
+                break;
+            }
+        }
+            /* set bus width for SDIO cards */
+        if (pHcd->CardProperties.Flags & CARD_SDIO) {
+                /* default */
+            regData = CARD_DETECT_DISABLE | SDIO_BUS_WIDTH_1_BIT;
+
+            if (SDCONFIG_GET_BUSWIDTH(pBusMode->BusModeFlags) == SDCONFIG_BUS_WIDTH_4_BIT) {
+                    /* turn off card detect resistor and set buswidth */
+                regData = CARD_DETECT_DISABLE | SDIO_BUS_WIDTH_4_BIT;
+                DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: Enabling 4 bit mode on card \n"));
+            } else {
+                DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: Enabling 1 bit mode on card \n"));
+            }
+            status = Cmd52WriteByteCommon(pDevice,
+                                          SDIO_BUS_IF_REG,
+                                          &regData);
+            if (!SDIO_SUCCESS(status)) {
+                DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Failed to set bus mode in Card : Err:%d\n",
+                                        status));
+                break;
+            }
+
+                /* check for 4-bit interrupt detect mode */
+            if ((SDCONFIG_GET_BUSWIDTH(pBusMode->BusModeFlags) == SDCONFIG_BUS_WIDTH_4_BIT) &&
+                (pHcd->CardProperties.SDIOCaps & SDIO_CAPS_INT_MULTI_BLK) &&
+                (pHcd->Attributes & SDHCD_ATTRIB_MULTI_BLK_IRQ)) {
+                    /* enable interrupts between blocks, this doesn't actually turn on interrupts
+                     * it merely allows interrupts to be asserted in the inter-block gap */
+                pHcd->CardProperties.SDIOCaps |= SDIO_CAPS_ENB_INT_MULTI_BLK;
+
+                DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: 4-Bit Multi-blk Interrupt support enabled\n"));
+            } else {
+                    /* make sure this is disabled */
+                pHcd->CardProperties.SDIOCaps &= ~SDIO_CAPS_ENB_INT_MULTI_BLK;
+            }
+
+            status = Cmd52WriteByteCommon(pDevice,
+                                          SDIO_CARD_CAPS_REG,
+                                          &pHcd->CardProperties.SDIOCaps);
+            if (!SDIO_SUCCESS(status)) {
+                DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Failed to update Card Caps register Err:%d\n",
+                                        status));
+                break;
+            }
+        }
+
+            /* set data bus width for MMC */
+        if (pHcd->CardProperties.Flags & CARD_MMC) {
+            UINT8  buswidth = 0;
+
+            if (SDCONFIG_GET_BUSWIDTH(pBusMode->BusModeFlags) == SDCONFIG_BUS_WIDTH_4_BIT) {
+                buswidth = MMC_EXT_BUS_WIDTH_4_BIT;
+            } else if (SDCONFIG_GET_BUSWIDTH(pBusMode->BusModeFlags) == SDCONFIG_BUS_WIDTH_MMC8_BIT) {
+                buswidth = MMC_EXT_BUS_WIDTH_8_BIT;
+            } else {
+                /* normal 1 bit mode .. nothing to do */
+                break;
+            }
+                /* now set the bus mode on the card */
+            switcharg = MMC_SWITCH_BUILD_ARG(MMC_SWITCH_CMD_SET0,
+                                             MMC_SWITCH_WRITE_BYTE,
+                                             MMC_EXT_BUS_WIDTH_OFFSET,
+                                             buswidth);
+
+            status = _IssueSimpleBusRequest(pHcd,
+                                            MMC_CMD_SWITCH,
+                                            switcharg,
+                                            SDREQ_FLAGS_RESP_R1B,
+                                            NULL);
+            if (!SDIO_SUCCESS(status)) {
+                DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Failed to set MMC bus width (arg:0x%X): %d \n",
+                                        switcharg, status));
+                break;
+            }
+
+            if (SDCONFIG_GET_BUSWIDTH(pBusMode->BusModeFlags) == SDCONFIG_BUS_WIDTH_4_BIT) {
+                DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: 4 bit MMC mode enabled (arg:0x%X) \n",
+                      switcharg));
+            } else if (SDCONFIG_GET_BUSWIDTH(pBusMode->BusModeFlags) == SDCONFIG_BUS_WIDTH_MMC8_BIT) {
+                DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: 8-Bit MMC mode enabled (arg:0x%X) \n",
+                      switcharg));
+            }
+        }
+
+    } while (FALSE);
+
+    if (SDIO_SUCCESS(status)) {
+            /* set the operating mode */
+        pHcd->CardProperties.BusMode = pBusMode->BusModeFlags;
+            /* set the actual clock rate */
+        pHcd->CardProperties.OperBusClock = pBusMode->ActualClockRate;
+    }
+
+    SemaphorePost(&pDevice->pHcd->ConfigureOpsSem);
+
+    return status;
+}
+
+/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  CardInitSetup - setup host for card initialization
+  Input:  pHcd - HCD object
+  Output:
+  Return:
+  Notes:
+
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+SDIO_STATUS CardInitSetup(PSDHCD pHcd)
+{
+    SDCONFIG_INIT_CLOCKS_DATA   initClocks;
+    SDCONFIG_BUS_MODE_DATA      busMode;
+    UINT32                      OCRvalue;
+    SDIO_STATUS                 status = SDIO_STATUS_SUCCESS;
+
+    ZERO_OBJECT(initClocks);
+    ZERO_OBJECT(busMode);
+        /* setup defaults */
+    initClocks.NumberOfClocks = SDMMC_MIN_INIT_CLOCKS;
+    busMode.ClockRate = SD_INIT_BUS_CLOCK;
+
+        /* check for SPI only */
+    if (pHcd->Attributes & SDHCD_ATTRIB_BUS_SPI) {
+            /* SPI cards startup in non-CRC mode with the exception of CMD0, the
+             * HCDs must issue CMD0 with the correct CRC , the spec shows that a
+             * CMD 0 sequence is 0x40,0x00,0x00,0x00,0x00,0x95 */
+        busMode.BusModeFlags = SDCONFIG_BUS_WIDTH_SPI | SDCONFIG_BUS_MODE_SPI_NO_CRC;
+    }
+        /* check if host supports 1 bit mode */
+        /* TODO : if host supports power switching, we can
+         * could initialize cards in SPI mode first */
+    if (pHcd->Attributes & SDHCD_ATTRIB_BUS_1BIT) {
+        busMode.BusModeFlags = SDCONFIG_BUS_WIDTH_1_BIT;
+    }
+
+        /* set initial VDD, starting at the highest allowable voltage and working
+         * our way down */
+    if (pHcd->SlotVoltageCaps & SLOT_POWER_3_3V) {
+        OCRvalue = SD_OCR_3_2_TO_3_3_VDD;
+    } else if (pHcd->SlotVoltageCaps & SLOT_POWER_3_0V) {
+        OCRvalue = SD_OCR_2_9_TO_3_0_VDD;
+    } else if (pHcd->SlotVoltageCaps & SLOT_POWER_2_8V) {
+        OCRvalue = SD_OCR_2_7_TO_2_8_VDD;
+    } else if (pHcd->SlotVoltageCaps & SLOT_POWER_2_0V) {
+        OCRvalue = SD_OCR_1_9_TO_2_0_VDD;
+    } else if (pHcd->SlotVoltageCaps & SLOT_POWER_1_8V) {
+        OCRvalue = SD_OCR_1_7_TO_1_8_VDD;
+    } else if (pHcd->SlotVoltageCaps & SLOT_POWER_1_6V) {
+        OCRvalue = SD_OCR_1_6_TO_1_7_VDD;
+    } else {
+        DBG_ASSERT(FALSE);
+        OCRvalue = 0;
+    }
+
+    do {
+            /* power up the card */
+        status = AdjustSlotPower(pHcd, &OCRvalue);
+        if (!SDIO_SUCCESS(status)) {
+            DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Failed to adjust slot power \n"));
+            break;
+        }
+        status = SetOperationalBusMode(pHcd->pPseudoDev,&busMode);
+        if (!SDIO_SUCCESS(status)) {
+            DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Failed to set bus mode \n"));
+            break;
+        }
+        status = _IssueConfig(pHcd,SDCONFIG_SEND_INIT_CLOCKS,&initClocks,sizeof(initClocks));
+        if (!SDIO_SUCCESS(status)) {
+            DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Failed to send init clocks in hcd \n"));
+            break;
+        }
+
+    } while(FALSE);
+
+    return status;
+}
+
+/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  SDInitializeCard - initialize card
+  Input:  pHcd - HCD object
+  Output: pProperties - card properties
+  Return:
+  Notes:
+
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+SDIO_STATUS SDInitializeCard(PSDHCD pHcd)
+{
+    SDCONFIG_BUS_MODE_DATA      busMode;
+    SDIO_STATUS                 status = SDIO_STATUS_SUCCESS;
+    PSDREQUEST                  pReq = NULL;
+    UINT32                      OCRvalue;
+    UINT32                      tplAddr;
+    UINT8                       temp;
+    struct SDIO_MANFID_TPL      manfid;
+    SDCONFIG_WP_VALUE           wpValue;
+    UINT8                       cisBuffer[3];
+
+    OCRvalue = 0;
+
+    do {
+        if (IS_HCD_BUS_MODE_SPI(pHcd)) {
+            DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: Initializing card in SPI mode \n"));
+        } else {
+            DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: Initializing card in MMC/SD mode \n"));
+        }
+
+        pReq = AllocateRequest();
+        if (NULL == pReq) {
+            status = SDIO_STATUS_NO_RESOURCES;
+            DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: failed to allocate bus request \n"));
+            break;
+        }
+        memset(pReq, 0, sizeof(SDREQUEST));
+
+        status = CardInitSetup(pHcd);
+        if (!SDIO_SUCCESS(status)) {
+            DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Failed to setup card \n"));
+            break;
+        }
+        status = _IssueConfig(pHcd,SDCONFIG_GET_WP,&wpValue,sizeof(wpValue));
+        if (!SDIO_SUCCESS(status)) {
+            DBG_PRINT(SDDBG_WARN, ("SDIO Bus Driver: host doesn't support Write Protect \n"));
+        } else {
+            if (wpValue) {
+                pHcd->CardProperties.Flags |= CARD_SD_WP;
+                DBG_PRINT(SDDBG_WARN, ("SDIO Bus Driver: SD WP switch is on \n"));
+            }
+        }
+
+        if (!(pHcd->Attributes & SDHCD_ATTRIB_SLOT_POLLING) &&
+            IS_HCD_BUS_MODE_SPI(pHcd)) {
+                /* for non-slot polling HCDs operating in SPI mode
+                 * issue CMD0 to reset card state and to place the card
+                 * in SPI mode.  If slot polling is used, the polling thread
+                 * will have already issued a CMD0 to place the card in SPI mode*/
+            if (IS_HCD_BUS_MODE_SPI(pHcd)) {
+                INT ii = 256;
+                status = SDIO_STATUS_ERROR;
+                /* if the CMD0 fails, retry it. Some cards have a hard time getting into SPI mode.*/
+                while ((!SDIO_SUCCESS(status)) && (ii-- >= 0)) {
+                    status = _IssueSimpleBusRequest(pHcd,CMD0,0,SDREQ_FLAGS_RESP_R1,pReq);
+                    OSSleep(20);
+                }
+                DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: cmd0 go SPI retries:(256) %d\n", ii));
+
+            } else {
+                status = _IssueSimpleBusRequest(pHcd,CMD0,0,SDREQ_FLAGS_NO_RESP,pReq);
+            }
+            if (!SDIO_SUCCESS(status)) {
+                DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: go-idle failed! \n"));
+                break;
+            }
+        }
+
+        DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: Looking for SDIO.. \n"));
+            /* check for SDIO card by trying to read it's OCR */
+        status = ReadOCR(pHcd,CARD_SDIO,pReq,0,&OCRvalue);
+        if (SDIO_SUCCESS(status)) {
+                /* we got a response, this is an SDIO card */
+            if (IS_HCD_BUS_MODE_SPI(pHcd)) {
+                    /* handle SPI */
+                pHcd->CardProperties.IOFnCount = SPI_SDIO_R4_GET_IO_FUNC_COUNT(pReq->Response);
+                if (SPI_SDIO_R4_IS_MEMORY_PRESENT(pReq->Response)) {
+                        /* flag an SD function exists */
+                    pHcd->CardProperties.Flags |= CARD_SD;
+                }
+            } else {
+                    /* handle native SD */
+                pHcd->CardProperties.IOFnCount = SD_SDIO_R4_GET_IO_FUNC_COUNT(pReq->Response);
+                if (SD_SDIO_R4_IS_MEMORY_PRESENT(pReq->Response)) {
+                        /* flag an SD function exists */
+                    pHcd->CardProperties.Flags |= CARD_SD;
+                }
+
+            }
+            if (0 == pHcd->CardProperties.IOFnCount) {
+                DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: SDIO Card reports no functions \n"));
+                status = SDIO_STATUS_DEVICE_ERROR;
+                pHcd->CardProperties.Flags = 0;
+                break;
+            }
+            pHcd->CardProperties.Flags |= CARD_SDIO;
+
+            DBG_PRINT(SDDBG_TRACE,
+                ("SDIO Bus Driver: SDIO Card, Functions: %d Card Info Flags:0x%X OCR:0x%8.8X\n",
+                      pHcd->CardProperties.IOFnCount, pHcd->CardProperties.Flags, OCRvalue));
+                /* adjust slot power for this SDIO card */
+            status = AdjustSlotPower(pHcd, &OCRvalue);
+            if (!SDIO_SUCCESS(status)) {
+                DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Failed to set power in hcd \n"));
+                break;
+            }
+                /* poll for SDIO card ready */
+            status = PollCardReady(pHcd,OCRvalue,CARD_SDIO);
+            if (!SDIO_SUCCESS(status)) {
+                break;
+            }
+        } else if (status != SDIO_STATUS_BUS_RESP_TIMEOUT){
+                /* major error in hcd, bail */
+            break;
+        }
+
+            /* check if this is an SDIO-only card before continuing  */
+        if (!(pHcd->CardProperties.Flags & CARD_SD) && (pHcd->CardProperties.Flags & CARD_SDIO)) {
+                /* this is an SDIO card with no memory function */
+            goto prepareCard;
+        }
+
+        if (!(pHcd->CardProperties.Flags & CARD_SDIO)) {
+                /* issue go idle only if we did not find an SDIO function in our earlier test */
+            if (IS_HCD_BUS_MODE_SPI(pHcd)) {
+                status = _IssueSimpleBusRequest(pHcd,CMD0,0,SDREQ_FLAGS_RESP_R1,pReq);
+            } else {
+                status = _IssueSimpleBusRequest(pHcd,CMD0,0,SDREQ_FLAGS_NO_RESP,pReq);
+            }
+            if (!SDIO_SUCCESS(status)) {
+                DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: go-idle failed! \n"));
+                break;
+            }
+        }
+
+        DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: Looking for SD Memory.. \n"));
+            /* SD Memory Card checking */
+            /* test for present of SD card (stand-alone or combo card) */
+        status = TestPresence(pHcd, CARD_SD, pReq);
+        if (SDIO_SUCCESS(status)) {
+                /* there is an SD Card present, could be part of a combo system */
+            pHcd->CardProperties.Flags |= CARD_SD;
+            if (0 == OCRvalue) {
+                DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: SD Memory card detected. \n"));
+                    /* no OCR value on entry this is a stand-alone card, go and get it*/
+                status = ReadOCR(pHcd,CARD_SD,pReq,0,&OCRvalue);
+                if (!SDIO_SUCCESS(status) || (OCRvalue == 0)) {
+                    DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Failed to get OCR (status:%d) \n",
+                                            status));
+                    break;
+                }
+                DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: SD Card Reports OCR:0x%8.8X \n", OCRvalue));
+                status = AdjustSlotPower(pHcd, &OCRvalue);
+                if (!SDIO_SUCCESS(status)) {
+                    DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Failed to adjust power \n"));
+                    break;
+                }
+            } else {
+                 DBG_ASSERT((pHcd->CardProperties.Flags & (CARD_SD | CARD_SDIO)));
+                 DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: SDIO Combo Card detected \n"));
+            }
+                /* poll for SD card ready */
+            status = PollCardReady(pHcd,OCRvalue,CARD_SD);
+            if (!SDIO_SUCCESS(status)) {
+                    /* check if this card has an SDIO function */
+                if (pHcd->CardProperties.Flags & CARD_SDIO) {
+                    DBG_PRINT(SDDBG_WARN, ("SDIO Bus Driver: Combo Detected but SD memory function failed \n"));
+                        /* allow SDIO functions to load normally */
+                    status = SDIO_STATUS_SUCCESS;
+                        /* remove SD flag */
+                    pHcd->CardProperties.Flags &= ~CARD_SD;
+                } else {
+                    break;
+                }
+            } else {
+                DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: SD Memory ready. \n"));
+            }
+                /* we're done, no need to check for MMC */
+            goto prepareCard;
+        } else if (status != SDIO_STATUS_BUS_RESP_TIMEOUT){
+                /* major error in hcd, bail */
+            break;
+        }
+
+        /* MMC card checking */
+        /* if we get here, these better not be set */
+        DBG_ASSERT(!(pHcd->CardProperties.Flags & (CARD_SD | CARD_SDIO)));
+           /* issue go idle */
+        if (IS_HCD_BUS_MODE_SPI(pHcd)) {
+            status = _IssueSimpleBusRequest(pHcd,CMD0,0,SDREQ_FLAGS_RESP_R1,pReq);
+        } else {
+            status = _IssueSimpleBusRequest(pHcd,CMD0,0,SDREQ_FLAGS_NO_RESP,pReq);
+        }
+        if (!SDIO_SUCCESS(status)) {
+            DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: go-idle failed! \n"));
+            break;
+        }
+
+        DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: Looking for MMC.. \n"));
+        status = TestPresence(pHcd, CARD_MMC, pReq);
+        if (!SDIO_SUCCESS(status)) {
+            DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: unknown card detected \n"));
+            break;
+        }
+        DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: MMC Card Detected \n"));
+        pHcd->CardProperties.Flags |= CARD_MMC;
+            /* read the OCR value */
+        status = ReadOCR(pHcd,CARD_MMC,pReq,0,&OCRvalue);
+        if (!SDIO_SUCCESS(status) || (OCRvalue == 0)) {
+            DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: Failed to get OCR (status:%d)",
+                                    status));
+            break;
+        }
+        DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: MMC Card Reports OCR:0x%8.8X \n", OCRvalue));
+            /* adjust power */
+        status = AdjustSlotPower(pHcd, &OCRvalue);
+        if (!SDIO_SUCCESS(status)) {
+             DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Failed to adjust power \n"));
+             break;
+        }
+            /* poll for MMC card ready */
+        status = PollCardReady(pHcd,OCRvalue,CARD_MMC);
+        if (!SDIO_SUCCESS(status)) {
+            break;
+        }
+            /* fall through and prepare MMC card */
+
+prepareCard:
+            /* we're done figuring out what was inserted, and setting up
+             * optimal slot voltage, now we need to prepare the card */
+        if (!IS_HCD_BUS_MODE_SPI(pHcd) &&
+            (pHcd->CardProperties.Flags & (CARD_SD | CARD_MMC))) {
+                /* non-SPI SD or MMC cards need to be moved to the "ident" state before we can get the
+                 * RCA or select the card using the new RCA */
+            status = _IssueSimpleBusRequest(pHcd,CMD2,0,SDREQ_FLAGS_RESP_R2,pReq);
+            if (!SDIO_SUCCESS(status)){
+                DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: failed to move SD/MMC card into ident state \n"));
+                break;
+            }
+        }
+
+        if (!IS_HCD_BUS_MODE_SPI(pHcd)) {
+                /* non-SPI mode cards need their RCA's setup */
+            if (pHcd->CardProperties.Flags & (CARD_SD | CARD_SDIO)) {
+                    /* issue CMD3 to get RCA on SD/SDIO cards */
+                status = _IssueSimpleBusRequest(pHcd,CMD3,0,SDREQ_FLAGS_RESP_R6,pReq);
+                if (!SDIO_SUCCESS(status)){
+                    DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: failed to get RCA for SD/SDIO card \n"));
+                    break;
+                }
+                pHcd->CardProperties.RCA = SD_R6_GET_RCA(pReq->Response);
+                DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: SD/SDIO RCA:0x%X \n",
+                                        pHcd->CardProperties.RCA));
+            } else if (pHcd->CardProperties.Flags & CARD_MMC) {
+                    /* for MMC cards, we have to assign a relative card address */
+                    /* just a non-zero number */
+                pHcd->CardProperties.RCA = 1;
+                    /* issue CMD3 to set the RCA for MMC cards */
+                status = _IssueSimpleBusRequest(pHcd,
+                                                CMD3,(pHcd->CardProperties.RCA << 16),
+                                                SDREQ_FLAGS_RESP_R1,pReq);
+                if (!SDIO_SUCCESS(status)){
+                    DBG_PRINT(SDDBG_ERROR,
+                            ("SDIO Bus Driver: failed to set RCA for MMC card! (err=%d) \n",status));
+                    break;
+                }
+            } else {
+                DBG_ASSERT(FALSE);
+            }
+        }
+            /* select the card in order to get the rest of the card info, applies
+             * to SDIO/SD/MMC cards*/
+        status = SelectDeselectCard(pHcd, TRUE);
+        if (!SDIO_SUCCESS(status)) {
+            DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: failed to select card! \n"));
+            break;
+        }
+        DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver, Card now Selected.. \n"));
+
+        if (pHcd->CardProperties.Flags & CARD_SDIO) {
+                /* read SDIO revision register */
+            status = Cmd52ReadByteCommon(pHcd->pPseudoDev, CCCR_SDIO_REVISION_REG, &temp);
+            if (!SDIO_SUCCESS(status)) {
+                break;
+            }
+            DBG_PRINT(SDDBG_TRACE, ("SDIO Revision Reg: 0x%X \n", temp));
+            switch (temp & SDIO_REV_MASK) {
+                case SDIO_REV_1_00:
+                    DBG_PRINT(SDDBG_TRACE, ("SDIO Spec Revision 1.00 \n"));
+                    pHcd->CardProperties.SDIORevision = SDIO_REVISION_1_00;
+                    break;
+                case SDIO_REV_1_10:
+                    DBG_PRINT(SDDBG_TRACE, ("SDIO Spec Revision 1.10 \n"));
+                    pHcd->CardProperties.SDIORevision = SDIO_REVISION_1_10;
+                    break;
+                case SDIO_REV_1_20:
+                    DBG_PRINT(SDDBG_TRACE, ("SDIO Spec Revision 1.20 \n"));
+                    pHcd->CardProperties.SDIORevision = SDIO_REVISION_1_20;
+                    break;
+                default:
+                    DBG_PRINT(SDDBG_WARN, ("SDIO Warning: unknown SDIO revision, treating like 1.0 device \n"));
+                    pHcd->CardProperties.SDIORevision = SDIO_REVISION_1_00;
+                    break;
+            }
+                /* get the common CIS ptr */
+            status = Cmd52ReadMultipleCommon(pHcd->pPseudoDev,
+                                             SDIO_CMN_CIS_PTR_LOW_REG,
+                                             cisBuffer,
+                                             3);
+            if (!SDIO_SUCCESS(status)) {
+                DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Failed to get CIS ptr, Err:%d", status));
+                break;
+            }
+                /* this is endian-safe*/
+            pHcd->CardProperties.CommonCISPtr = ((UINT32)cisBuffer[0]) |
+                                                (((UINT32)cisBuffer[1]) << 8) |
+                                                (((UINT32)cisBuffer[2]) << 16);
+
+            DBG_PRINT(SDDBG_TRACE, ("SDIO Card CIS Ptr: 0x%X \n", pHcd->CardProperties.CommonCISPtr));
+            temp = sizeof(manfid);
+            tplAddr = pHcd->CardProperties.CommonCISPtr;
+                /* get the MANFID tuple */
+            status = SDLIB_FindTuple(pHcd->pPseudoDev,
+                                     CISTPL_MANFID,
+                                     &tplAddr,
+                                     (PUINT8)&manfid,
+                                     &temp);
+            if (!SDIO_SUCCESS(status)) {
+                DBG_PRINT(SDDBG_WARN, ("SDIO Bus Driver: Failed to get MANFID tuple err:%d \n", status));
+                status = SDIO_STATUS_SUCCESS;
+            } else {
+                    /* save this off so that it can be copied into each SDIO Func's SDDEVICE structure */
+                pHcd->CardProperties.SDIO_ManufacturerCode =
+                                        CT_LE16_TO_CPU_ENDIAN(manfid.ManufacturerCode);
+                pHcd->CardProperties.SDIO_ManufacturerID =
+                                        CT_LE16_TO_CPU_ENDIAN(manfid.ManufacturerInfo);
+                DBG_PRINT(SDDBG_TRACE, ("SDIO MANFID:0x%X, MANFINFO:0x%X \n",
+                                        pHcd->CardProperties.SDIO_ManufacturerID,
+                                        pHcd->CardProperties.SDIO_ManufacturerCode));
+            }
+
+            if (pHcd->CardProperties.SDIORevision >= SDIO_REVISION_1_10) {
+                    /* read power control */
+                status = Cmd52ReadByteCommon(pHcd->pPseudoDev, SDIO_POWER_CONTROL_REG, &temp);
+                if (SDIO_SUCCESS(status)) {
+                        /* check for power control support which indicates the card may use more
+                         * than 200 mA */
+                    if (temp & SDIO_POWER_CONTROL_SMPC) {
+                            /* check that the host can support this. */
+                        if (pHcd->MaxSlotCurrent >= SDIO_EMPC_CURRENT_THRESHOLD) {
+                            temp = SDIO_POWER_CONTROL_EMPC;
+                                /* enable power control on the card */
+                            status = Cmd52WriteByteCommon(pHcd->pPseudoDev, SDIO_POWER_CONTROL_REG, &temp);
+                            if (!SDIO_SUCCESS(status)) {
+                                DBG_PRINT(SDDBG_ERROR,
+                                        ("SDIO Busdriver: failed to enable power control (%d) \n",status));
+                                break;
+                            }
+                                /* mark that the card is high power */
+                            pHcd->CardProperties.Flags |= CARD_HIPWR;
+
+                            DBG_PRINT(SDDBG_TRACE,
+                               ("SDIO Busdriver: Power Control Enabled on SDIO (1.10 or greater) card \n"));
+                        } else {
+                            DBG_PRINT(SDDBG_WARN,
+                               ("SDIO Busdriver: Card can operate higher than 200mA, host cannot (max:%d) \n",
+                               pHcd->MaxSlotCurrent));
+                            /* this is not fatal, the card should operate at a reduced rate */
+                        }
+                    } else {
+                        DBG_PRINT(SDDBG_TRACE,
+                            ("SDIO Busdriver: SDIO 1.10 (or greater) card draws less than 200mA \n"));
+                    }
+                } else {
+                    DBG_PRINT(SDDBG_WARN,
+                            ("SDIO Busdriver: failed to get POWER CONTROL REG (%d) \n",status));
+                    /* fall through and continue on at reduced mode */
+                }
+            }
+        }
+            /* get the current bus parameters */
+        busMode.BusModeFlags = pHcd->CardProperties.BusMode;
+        busMode.ClockRate =  pHcd->CardProperties.OperBusClock;
+            /* get the rest of the bus parameters like clock and supported bus width */
+        status = GetBusParameters(pHcd,&busMode);
+        if (!SDIO_SUCCESS(status)) {
+            break;
+        }
+
+        if (IS_HCD_BUS_MODE_SPI(pHcd)) {
+                /* check HCD if it wants to run without SPI CRC */
+            if (pHcd->Attributes & SDHCD_ATTRIB_NO_SPI_CRC) {
+                    /* hcd would rather not run with CRC we don't need to tell the card since SPI mode
+                     * cards power up with CRC initially disabled */
+                busMode.BusModeFlags |= SDCONFIG_BUS_MODE_SPI_NO_CRC;
+            } else {
+                    /* first enable SPI CRC checking if the HCD can handle it */
+                status = SDSPIModeEnableDisableCRC(pHcd->pPseudoDev, TRUE);
+                if (!SDIO_SUCCESS(status)) {
+                    DBG_PRINT(SDDBG_ERROR,
+                                ("SDIO Bus Driver: Failed to set Enable SPI CRC on card \n"));
+                    break;
+                }
+            }
+        }
+
+        status = SetOperationalBusMode(pHcd->pPseudoDev, &busMode);
+
+        if (!SDIO_SUCCESS(status)) {
+            DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Failed to set operational bus mode\n"));
+            break;
+        }
+
+        DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: Oper. Mode: Clock:%d, Bus:0x%X \n",
+                                pHcd->CardProperties.OperBusClock,pHcd->CardProperties.BusMode));
+        DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: Card in TRANS state, Ready: CardInfo Flags 0x%X \n",
+                                pHcd->CardProperties.Flags));
+
+    } while (FALSE);
+
+    if (pReq != NULL) {
+        FreeRequest(pReq);
+    }
+
+    return status;
+}
+
+/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  SDQuerySDMMCInfo - query MMC card info
+  Input:  pDevice - device
+  Output:
+  Return:
+  Notes:
+
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+SDIO_STATUS SDQuerySDMMCInfo(PSDDEVICE pDevice)
+{
+    SDIO_STATUS status = SDIO_STATUS_SUCCESS;
+    PSDREQUEST  pReq = NULL;
+    UINT8       CID[MAX_CSD_CID_BYTES];
+
+    do {
+        pReq = AllocateRequest();
+        if (NULL == pReq) {
+            status = SDIO_STATUS_NO_RESOURCES;
+            break;
+        }
+            /* de-select the card */
+        status = SelectDeselectCard(pDevice->pHcd,FALSE);
+        if (!SDIO_SUCCESS(status)) {
+            DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Failed to deselect card before getting CID \n"));
+            break;
+        }
+
+        if (SDDEVICE_IS_BUSMODE_SPI(pDevice)) {
+                /* in SPI mode, getting the CSD requires a data transfer */
+            status = _IssueBusRequestBd(pDevice->pHcd,CMD10,0,
+                                        SDREQ_FLAGS_RESP_R1 | SDREQ_FLAGS_DATA_TRANS,
+                                        pReq,
+                                        CID,
+                                        MAX_CSD_CID_BYTES);
+            if (SDIO_SUCCESS(status)) {
+                    /* in SPI mode we need to reorder to the CID since SPI data comes in MSB first*/
+                ReorderBuffer(CID,MAX_CSD_CID_BYTES);
+            }
+        } else {
+                /* get the CID */
+            status = _IssueSimpleBusRequest(pDevice->pHcd,
+                                            CMD10,
+                                            (SDDEVICE_GET_CARD_RCA(pDevice) << 16),
+                                            SDREQ_FLAGS_RESP_R2,
+                                            pReq);
+            if (SDIO_SUCCESS(status)) {
+                    /* extract it from the reponse */
+                memcpy(CID,pReq->Response,MAX_CSD_CID_BYTES);
+            }
+        }
+
+        if (!SDIO_SUCCESS(status)) {
+            DBG_PRINT(SDDBG_WARN, ("SDQuerySDMMCInfo: failed to get CID. \n"));
+            status = SDIO_STATUS_SUCCESS;
+        } else {
+            pDevice->pId[0].SDMMC_ManfacturerID = GET_SD_CID_MANFID(CID);
+            pDevice->pId[0].SDMMC_OEMApplicationID = GET_SD_CID_OEMID(CID);
+#if DEBUG
+            {
+                char pBuf[7];
+
+                pBuf[0] = GET_SD_CID_PN_1(CID);
+                pBuf[1] = GET_SD_CID_PN_2(CID);
+                pBuf[2] = GET_SD_CID_PN_3(CID);
+                pBuf[3] = GET_SD_CID_PN_4(CID);
+                pBuf[4] = GET_SD_CID_PN_5(CID);
+                if (pDevice->pHcd->CardProperties.Flags & CARD_MMC) {
+                    pBuf[5] = GET_SD_CID_PN_6(CID);
+                    pBuf[6] = 0;
+                } else {
+                    pBuf[5] = 0;
+                }
+                DBG_PRINT(SDDBG_TRACE, ("SDQuerySDMMCInfo: Product String: %s\n", pBuf));
+            }
+#endif
+            DBG_PRINT(SDDBG_TRACE, ("SDQuerySDMMCInfo: ManfID: 0x%X, OEMID:0x%X \n",
+                       pDevice->pId[0].SDMMC_ManfacturerID, pDevice->pId[0].SDMMC_OEMApplicationID));
+        }
+            /* re-select card */
+        status = SelectDeselectCard(pDevice->pHcd,TRUE);
+        if (!SDIO_SUCCESS(status)) {
+            DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Failed to re-select card after getting CID \n"));
+            break;
+        }
+    } while (FALSE);
+
+    if (pReq != NULL) {
+        FreeRequest(pReq);
+    }
+
+    return status;
+}
+
+/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  SDQuerySDIOInfo - query SDIO card info
+  Input:  pDevice - the device
+  Output:
+  Return:
+  Notes:
+
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+SDIO_STATUS SDQuerySDIOInfo(PSDDEVICE pDevice)
+{
+    SDIO_STATUS     status = SDIO_STATUS_SUCCESS;
+    UINT32          faddress;
+    UINT8           fInfo;
+    UINT32          nextTpl;
+    UINT8           tplLength;
+    UINT8           cisPtrBuffer[3];
+    struct SDIO_FUNC_EXT_FUNCTION_TPL_1_1 funcTuple;
+
+        /* use the card-wide SDIO manufacturer code and ID previously read.*/
+    pDevice->pId[0].SDIO_ManufacturerCode = pDevice->pHcd->CardProperties.SDIO_ManufacturerCode;
+    pDevice->pId[0].SDIO_ManufacturerID = pDevice->pHcd->CardProperties.SDIO_ManufacturerID;
+
+        /* calculate function base address */
+    faddress = CalculateFBROffset(SDDEVICE_GET_SDIO_FUNCNO(pDevice));
+    DBG_ASSERT(faddress != 0);
+
+    do {
+        status = Cmd52ReadByteCommon(pDevice,
+                                     FBR_FUNC_INFO_REG_OFFSET(faddress),
+                                     &fInfo);
+        if (!SDIO_SUCCESS(status)) {
+            DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Failed to get function info, Err:%d , using Class:UNKNOWN\n", status));
+            fInfo = 0;
+            pDevice->pId[0].SDIO_FunctionClass = 0;
+            status = SDIO_STATUS_SUCCESS;
+        } else {
+            pDevice->pId[0].SDIO_FunctionClass = fInfo & FUNC_INFO_DEVICE_CODE_MASK;
+        }
+
+        if ((FUNC_INFO_DEVICE_CODE_LAST == pDevice->pId[0].SDIO_FunctionClass) &&
+            SDDEVICE_IS_SDIO_REV_GTEQ_1_10(pDevice)) {
+                /* if the device code is the last one, check for 1.1 revision and get the
+                 * extended code */
+            status = Cmd52ReadByteCommon(pDevice,
+                                         FBR_FUNC_EXT_DEVICE_CODE_OFFSET(faddress),
+                                         &(pDevice->pId[0].SDIO_FunctionClass));
+            if (!SDIO_SUCCESS(status)) {
+                DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Failed to get 1.1 extended DC, Err:%d\n",
+                                        status));
+                break;
+            }
+        }
+
+            /* get the function CIS ptr */
+        status = Cmd52ReadMultipleCommon(pDevice,
+                                         FBR_FUNC_CIS_LOW_OFFSET(faddress),
+                                         cisPtrBuffer,
+                                         3);
+        if (!SDIO_SUCCESS(status)) {
+            DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Failed to get FN CIS ptr, Err:%d\n", status));
+            break;
+        }
+            /* endian safe */
+        pDevice->DeviceInfo.AsSDIOInfo.FunctionCISPtr = ((UINT32)cisPtrBuffer[0]) |
+                                                        (((UINT32)cisPtrBuffer[1]) << 8) |
+                                                        (((UINT32)cisPtrBuffer[2]) << 16);
+
+        DBG_PRINT(SDDBG_TRACE, ("SDIO Function:%d, Class:%d FnCISPtr:0x%X \n",
+                  SDDEVICE_GET_SDIO_FUNCNO(pDevice),
+                  pDevice->pId[0].SDIO_FunctionClass,pDevice->DeviceInfo.AsSDIOInfo.FunctionCISPtr));
+
+        if (fInfo & FUNC_INFO_SUPPORTS_CSA_MASK) {
+               /* get the function CSA ptr */
+            status = Cmd52ReadMultipleCommon(pDevice,
+                                             FBR_FUNC_CSA_LOW_OFFSET(faddress),
+                                             cisPtrBuffer,
+                                             3);
+            if (!SDIO_SUCCESS(status)) {
+                DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Failed to get FN CSA ptr, Err:%d \n", status));
+                break;
+            }
+                /* endian safe */
+            pDevice->DeviceInfo.AsSDIOInfo.FunctionCSAPtr = ((UINT32)cisPtrBuffer[0]) |
+                                                            (((UINT32)cisPtrBuffer[1]) << 8) |
+                                                            (((UINT32)cisPtrBuffer[2]) << 16);
+
+        }
+
+        nextTpl = SDDEVICE_GET_SDIO_FUNC_CISPTR(pDevice);
+            /* look for the funce TPL */
+        tplLength = sizeof(funcTuple);
+            /* go get the func CE tuple */
+        status = SDLIB_FindTuple(pDevice,
+                                 CISTPL_FUNCE,
+                                 &nextTpl,
+                                 (PUINT8)&funcTuple,
+                                 &tplLength);
+
+        if (!SDIO_SUCCESS(status)){
+            /* handles case of bad CIS or missing tupple, allow function driver to handle */
+            DBG_PRINT(SDDBG_WARN, ("SDIO Bus Driver: Failed to get FuncCE Tuple: %d \n", status));
+            status = SDIO_STATUS_SUCCESS;
+            break;
+        }
+            /* set the max block size */
+        pDevice->DeviceInfo.AsSDIOInfo.FunctionMaxBlockSize =
+                                CT_LE16_TO_CPU_ENDIAN(funcTuple.CommonInfo.MaxBlockSize);
+
+        DBG_PRINT(SDDBG_TRACE, ("SDIO Function:%d, MaxBlocks:%d \n",
+                  SDDEVICE_GET_SDIO_FUNCNO(pDevice),
+                  pDevice->DeviceInfo.AsSDIOInfo.FunctionMaxBlockSize));
+
+            /* check for MANFID function tuple (SDIO 1.1 or greater) */
+        if (SDDEVICE_IS_SDIO_REV_GTEQ_1_10(pDevice)) {
+            struct SDIO_MANFID_TPL      manfid;
+            nextTpl = SDDEVICE_GET_SDIO_FUNC_CISPTR(pDevice);
+            tplLength = sizeof(manfid);
+                /* get the MANFID tuple */
+            status = SDLIB_FindTuple(pDevice,
+                                     CISTPL_MANFID,
+                                     &nextTpl,
+                                     (PUINT8)&manfid,
+                                     &tplLength);
+            if (SDIO_SUCCESS(status)) {
+                    /* this function has a MANFID tuple */
+                pDevice->pId[0].SDIO_ManufacturerCode =
+                                        CT_LE16_TO_CPU_ENDIAN(manfid.ManufacturerCode);
+                pDevice->pId[0].SDIO_ManufacturerID =
+                                        CT_LE16_TO_CPU_ENDIAN(manfid.ManufacturerInfo);
+                DBG_PRINT(SDDBG_TRACE, ("SDIO 1.1 (Function Specific) MANFID:0x%X, MANFINFO:0x%X \n",
+                                        pDevice->pId[0].SDIO_ManufacturerID,
+                                        pDevice->pId[0].SDIO_ManufacturerCode));
+            } else {
+                DBG_PRINT(SDDBG_WARN, ("SDIO 1.1, No CISTPL_MANFID Tuple in FUNC CIS \n"));
+                status = SDIO_STATUS_SUCCESS;
+            }
+        }
+    } while (FALSE);
+
+    return status;
+}
+
+/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  SDEnableFunction - enable function
+  Input:  pDevice - the device/function
+          pEnData - enable data;
+  Output:
+  Return: status
+  Notes: Note, this performs synchronous calls
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+SDIO_STATUS SDEnableFunction(PSDDEVICE pDevice, PSDCONFIG_FUNC_ENABLE_DISABLE_DATA pEnData)
+{
+    SDIO_STATUS status = SDIO_STATUS_SUCCESS;
+    UINT8       registerValue;
+    UINT8       mask;
+    FUNC_ENABLE_TIMEOUT  retry;
+
+        /* take the configure op lock to make this atomic */
+    status = SemaphorePendInterruptable(&pDevice->pHcd->ConfigureOpsSem);
+    if (!SDIO_SUCCESS(status)) {
+        return status;
+    }
+
+    status = SDIO_STATUS_INVALID_PARAMETER;
+    do {
+        if (!(pDevice->pHcd->CardProperties.Flags & CARD_SDIO)){
+                /* nothing to do if it's not an SDIO card */
+            break;
+        }
+
+        if (!((SDDEVICE_GET_SDIO_FUNCNO(pDevice) >= SDIO_FIRST_FUNCTION_NUMBER) &&
+              (SDDEVICE_GET_SDIO_FUNCNO(pDevice) <= SDIO_LAST_FUNCTION_NUMBER))){
+            DBG_ASSERT(FALSE);
+            break;
+        }
+            /* make sure there is a timeout value */
+        if (0 == pEnData->TimeOut) {
+            break;
+        }
+
+        mask = 1 << SDDEVICE_GET_SDIO_FUNCNO(pDevice);
+            /* read the enable register */
+        status = Cmd52ReadByteCommon(pDevice, SDIO_ENABLE_REG, &registerValue);
+        if (!SDIO_SUCCESS(status)){
+            break;
+        }
+        if (pEnData->EnableFlags & SDCONFIG_ENABLE_FUNC) {
+                /* set the enable register bit */
+            registerValue |= mask;
+        } else {
+               /* clear the bit */
+            registerValue &= ~mask;
+        }
+
+        DBG_PRINT(SDDBG_TRACE,
+                ("SDIO Bus Driver %s Function, Mask:0x%X Enable Reg Value:0x%2.2X\n",
+                 (pEnData->EnableFlags & SDCONFIG_ENABLE_FUNC) ? "Enabling":"Disabling",
+                 mask,
+                 registerValue));
+
+            /* write it back out */
+        status = Cmd52WriteByteCommon(pDevice, SDIO_ENABLE_REG, &registerValue);
+        if (!SDIO_SUCCESS(status)){
+            break;
+        }
+            /* now poll the ready bit until it sets or clears */
+        retry = pEnData->TimeOut;
+        DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: Function Enable/Disable Polling: %d retries \n",
+                                retry));
+        while (retry) {
+            status = Cmd52ReadByteCommon(pDevice, SDIO_READY_REG, &registerValue);
+            if (!SDIO_SUCCESS(status)){
+                break;
+            }
+            if (pEnData->EnableFlags & SDCONFIG_ENABLE_FUNC) {
+                    /* if the bit is set, the device is ready */
+                if (registerValue & mask) {
+                        /* device ready */
+                    break;
+                }
+            } else {
+                if (!(registerValue & mask)) {
+                        /* device is no longer ready */
+                    break;
+                }
+            }
+                /* sleep before trying again */
+            status = OSSleep(1);
+            if (!SDIO_SUCCESS(status)) {
+                DBG_PRINT(SDDBG_ERROR, ("OSSleep Failed! \n"));
+                break;
+            }
+            retry--;
+        }
+
+        if (0 == retry) {
+            status = SDIO_STATUS_FUNC_ENABLE_TIMEOUT;
+            break;
+        }
+
+    } while (FALSE);
+
+    SemaphorePost(&pDevice->pHcd->ConfigureOpsSem);
+    return status;
+}
+
+/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  SDAllocFreeSlotCurrent - allocate or free slot current
+  Input:  pDevice - the device/function
+          Allocate - Allocate current, else free
+          pData - slotcurrent data (non-NULL if Allocate is TRUE)
+  Output:
+  Return: status
+  Notes:  if the function returns SDIO_STATUS_NO_RESOURCES, the pData->SlotCurrent field is
+          updated with the available current
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+SDIO_STATUS SDAllocFreeSlotCurrent(PSDDEVICE pDevice, BOOL Allocate, PSDCONFIG_FUNC_SLOT_CURRENT_DATA pData)
+{
+    SDIO_STATUS status = SDIO_STATUS_SUCCESS;
+
+    DBG_PRINT(SDDBG_TRACE, ("+SDIO Bus Driver: SDAllocFreeSlotCurrent\n"));
+
+        /* take the configure op lock to make this atomic */
+    status = SemaphorePendInterruptable(&pDevice->pHcd->ConfigureOpsSem);
+    if (!SDIO_SUCCESS(status)) {
+        return status;
+    }
+
+    status = SDIO_STATUS_INVALID_PARAMETER;
+    do {
+            /* check the current budget and allocate */
+        if (Allocate) {
+            if (0 == pData->SlotCurrent) {
+                /* caller must specify current requirement for the power mode */
+                break;
+            }
+            if (pDevice->SlotCurrentAlloc != 0) {
+               /* slot current has already been allocated, caller needs to free
+                * first */
+                DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Slot Current Already allocated! \n"));
+                break;
+            }
+            if (((UINT32)pDevice->pHcd->SlotCurrentAllocated + (UINT32)pData->SlotCurrent) >
+                (UINT32)pDevice->pHcd->MaxSlotCurrent) {
+                DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Slot Current Budget exceeded, Requesting: %d, Allocated already: %d, Max: %d \n",
+                            pData->SlotCurrent, pDevice->pHcd->SlotCurrentAllocated,
+                            pDevice->pHcd->MaxSlotCurrent));
+                status = SDIO_STATUS_NO_RESOURCES;
+                    /* return remaining */
+                pData->SlotCurrent = pDevice->pHcd->MaxSlotCurrent -
+                                     pDevice->pHcd->SlotCurrentAllocated;
+                break;
+            }
+                /* bump up allocation */
+            pDevice->pHcd->SlotCurrentAllocated += pData->SlotCurrent;
+                /* save this off for the call to free slot current */
+            pDevice->SlotCurrentAlloc = pData->SlotCurrent;
+            DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: Slot Current Requested: %d, New Total: %d, Max: %d \n",
+                            pData->SlotCurrent, pDevice->pHcd->SlotCurrentAllocated,
+                            pDevice->pHcd->MaxSlotCurrent));
+
+        } else {
+            if (0 == pDevice->SlotCurrentAlloc) {
+                    /* no allocation */
+                break;
+            }
+                /* return the allocation back */
+            if (pDevice->SlotCurrentAlloc <= pDevice->pHcd->SlotCurrentAllocated) {
+                pDevice->pHcd->SlotCurrentAllocated -= pDevice->SlotCurrentAlloc;
+                DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: Slot Current Freed: %d, New Total: %d, Max: %d \n",
+                            pDevice->SlotCurrentAlloc, pDevice->pHcd->SlotCurrentAllocated,
+                            pDevice->pHcd->MaxSlotCurrent));
+            } else {
+                DBG_ASSERT(FALSE);
+            }
+
+                /* make sure this is zeroed */
+            pDevice->SlotCurrentAlloc = 0;
+        }
+
+        status = SDIO_STATUS_SUCCESS;
+
+    } while (FALSE);
+
+    SemaphorePost(&pDevice->pHcd->ConfigureOpsSem);
+    DBG_PRINT(SDDBG_TRACE, ("-SDIO Bus Driver: SDAllocFreeSlotCurrent, %d\n", status));
+    return status;
+}
+
+static void RawHcdIrqControl(PSDHCD pHcd, BOOL Enable)
+{
+    SDIO_STATUS status;
+    SDCONFIG_SDIO_INT_CTRL_DATA irqData;
+    CT_DECLARE_IRQ_SYNC_CONTEXT();
+
+    ZERO_OBJECT(irqData);
+
+    status = _AcquireHcdLock(pHcd);
+    if (!SDIO_SUCCESS(status)) {
+        return;
+    }
+
+    do {
+            /* for raw devices, we simply enable/disable in the HCD only */
+        if (Enable) {
+            DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver (RAW) Unmasking Int \n"));
+            irqData.IRQDetectMode = IRQ_DETECT_RAW;
+            irqData.SlotIRQEnable = TRUE;
+        } else {
+            DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver (RAW) Masking Int \n"));
+            irqData.SlotIRQEnable = FALSE;
+        }
+
+        status = _IssueConfig(pHcd,SDCONFIG_SDIO_INT_CTRL,
+                              (PVOID)&irqData, sizeof(irqData));
+
+        if (!SDIO_SUCCESS(status)){
+            DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver failed to enable/disable IRQ in (RAW) hcd :%d\n",
+                                    status));
+        }
+
+    } while (FALSE);
+
+    status = _ReleaseHcdLock(pHcd);
+}
+
+static void RawHcdEnableIrqPseudoComplete(PSDREQUEST pReq)
+{
+    if (SDIO_SUCCESS(pReq->Status)) {
+        RawHcdIrqControl((PSDHCD)pReq->pCompleteContext, TRUE);
+    }
+    FreeRequest(pReq);
+}
+
+static void RawHcdDisableIrqPseudoComplete(PSDREQUEST pReq)
+{
+    RawHcdIrqControl((PSDHCD)pReq->pCompleteContext, FALSE);
+    FreeRequest(pReq);
+}
+
+static void HcdIrqControl(PSDHCD pHcd, BOOL Enable)
+{
+    SDIO_STATUS                 status;
+    SDCONFIG_SDIO_INT_CTRL_DATA irqData;
+    CT_DECLARE_IRQ_SYNC_CONTEXT();
+
+    ZERO_OBJECT(irqData);
+
+    status = _AcquireHcdLock(pHcd);
+    if (!SDIO_SUCCESS(status)) {
+        return;
+    }
+
+    do {
+        DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: HcdIrqControl (%s), IrqsEnabled:0x%X \n",
+                        Enable ? "Enable":"Disable",pHcd->IrqsEnabled ));
+
+        if (Enable) {
+            irqData.SlotIRQEnable = TRUE;
+        } else {
+            irqData.SlotIRQEnable = FALSE;
+        }
+                /* setup HCD to enable/disable it's detection hardware */
+        if (irqData.SlotIRQEnable) {
+                /* set the IRQ detection mode */
+            switch (SDCONFIG_GET_BUSWIDTH(pHcd->CardProperties.BusMode)) {
+                case SDCONFIG_BUS_WIDTH_SPI:
+                    irqData.IRQDetectMode = IRQ_DETECT_SPI;
+                    break;
+                case SDCONFIG_BUS_WIDTH_1_BIT:
+                    irqData.IRQDetectMode = IRQ_DETECT_1_BIT;
+                    break;
+                case SDCONFIG_BUS_WIDTH_4_BIT:
+                    irqData.IRQDetectMode = IRQ_DETECT_4_BIT;
+                        /* check card and HCD for 4bit multi-block interrupt support */
+                    if ((pHcd->CardProperties.SDIOCaps & SDIO_CAPS_INT_MULTI_BLK) &&
+                        (pHcd->Attributes & SDHCD_ATTRIB_MULTI_BLK_IRQ)) {
+                            /* note: during initialization of the card, the mult-blk IRQ support
+                             * is enabled in card caps register */
+                        irqData.IRQDetectMode |= IRQ_DETECT_MULTI_BLK;
+                        DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver enabling IRQ in multi-block mode:\n"));
+                    }
+                    break;
+                default:
+                    DBG_ASSERT(FALSE);
+                    break;
+            }
+
+            DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver enabling IRQ in HCD Mode:0x%X\n",
+                                     irqData.IRQDetectMode));
+        }
+
+        status = _IssueConfig(pHcd,SDCONFIG_SDIO_INT_CTRL,
+                                (PVOID)&irqData, sizeof(irqData));
+        if (!SDIO_SUCCESS(status)){
+            DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver failed to enable/disable IRQ in hcd %d\n",
+                                    status));
+        }
+
+    } while (FALSE);
+
+    status = _ReleaseHcdLock(pHcd);
+}
+
+static BOOL CheckWriteIntEnableSuccess(PSDREQUEST pReq)
+{
+    if (!SDIO_SUCCESS(pReq->Status)){
+            DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Failed to get write INT Enable register Err:%d\n",
+                                     pReq->Status));
+        return FALSE;
+    }
+
+    if (SD_R5_GET_RESP_FLAGS(pReq->Response) & SD_R5_ERRORS) {
+       DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: WriteIntEnableComplete CMD52 resp error: 0x%X \n",
+                  SD_R5_GET_RESP_FLAGS(pReq->Response)));
+        return FALSE;
+    }
+
+    return TRUE;
+}
+
+static void HcdIrqEnableComplete(PSDREQUEST pReq)
+{
+    if (CheckWriteIntEnableSuccess(pReq)) {
+            /* configure HCD */
+        HcdIrqControl((PSDHCD)pReq->pCompleteContext, TRUE);
+    }
+    FreeRequest(pReq);
+}
+
+static void HcdIrqDisableComplete(PSDREQUEST pReq)
+{
+    CheckWriteIntEnableSuccess(pReq);
+    HcdIrqControl((PSDHCD)pReq->pCompleteContext, FALSE);
+    FreeRequest(pReq);
+}
+
+static void WriteIntEnableComplete(PSDREQUEST pReq)
+{
+   if (CheckWriteIntEnableSuccess(pReq)) {
+       DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: Wrote INT Enable value:0x%X \n",
+                    (INT)pReq->pCompleteContext));
+   }
+   FreeRequest(pReq);
+}
+
+static void HcdAckComplete(PSDREQUEST pReq)
+{
+    SDIO_STATUS status;
+    DBG_PRINT(SDIODBG_FUNC_IRQ, ("SDIO Bus Driver: Hcd (0x%X) Irq Ack \n",
+                    (INT)pReq->pCompleteContext));
+        /* re-arm the HCD */
+    status = _IssueConfig((PSDHCD)pReq->pCompleteContext,SDCONFIG_SDIO_REARM_INT,NULL,0);
+
+    if (!SDIO_SUCCESS(status)) {
+        DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: HCD Re-Arm failed : %d\n",
+                    status));
+    }
+    FreeRequest(pReq);
+}
+/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  SDFunctionAckInterrupt - handle device interrupt acknowledgement
+  Input:  pDevice - the device
+  Output:
+  Return:
+  Notes:
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+SDIO_STATUS SDFunctionAckInterrupt(PSDDEVICE pDevice)
+{
+    SDIO_STATUS status = SDIO_STATUS_SUCCESS;
+    UCHAR       mask;
+    PSDREQUEST  pReq = NULL;
+    BOOL        setHcd = FALSE;
+    SDIO_STATUS status2;
+    CT_DECLARE_IRQ_SYNC_CONTEXT();
+
+    pReq = AllocateRequest();
+    if (NULL == pReq) {
+        return SDIO_STATUS_NO_RESOURCES;
+    }
+
+    status = _AcquireHcdLock(pDevice->pHcd);
+
+    if (!SDIO_SUCCESS(status)) {
+        FreeRequest(pReq);
+        return status;
+    }
+
+    do {
+        if (!((SDDEVICE_GET_SDIO_FUNCNO(pDevice) >= SDIO_FIRST_FUNCTION_NUMBER) &&
+              (SDDEVICE_GET_SDIO_FUNCNO(pDevice) <= SDIO_LAST_FUNCTION_NUMBER))){
+            status = SDIO_STATUS_INVALID_PARAMETER;
+            DBG_ASSERT(FALSE);
+            break;
+        }
+        mask = 1 << SDDEVICE_GET_SDIO_FUNCNO(pDevice);
+        if (pDevice->pHcd->PendingIrqAcks & mask) {
+                /* clear the ack bit in question */
+            pDevice->pHcd->PendingIrqAcks &= ~mask;
+            if (0 == pDevice->pHcd->PendingIrqAcks) {
+                pDevice->pHcd->IrqProcState = SDHCD_IDLE;
+                    /* no pending acks, so re-arm if irqs are stilled enabled */
+                if (pDevice->pHcd->IrqsEnabled) {
+                    setHcd = TRUE;
+                        /* issue pseudo request to sync this with bus requests */
+                    pReq->Status = SDIO_STATUS_SUCCESS;
+                    pReq->pCompletion = HcdAckComplete;
+                    pReq->pCompleteContext = pDevice->pHcd;
+                    pReq->Flags = SD_PSEUDO_REQ_FLAGS;
+                }
+            }
+        } else {
+            DBG_PRINT(SDDBG_WARN, ("SDIO Bus Driver: AckInterrupt: no IRQ pending on Function :%d, \n",
+                        SDDEVICE_GET_SDIO_FUNCNO(pDevice)));
+        }
+    } while (FALSE);
+
+    status2 = ReleaseHcdLock(pDevice);
+
+    if (pReq != NULL) {
+        if (SDIO_SUCCESS(status) && (setHcd)) {
+                /* issue request */
+            IssueRequestToHCD(pDevice->pHcd,pReq);
+        } else {
+            FreeRequest(pReq);
+        }
+    }
+
+    return status;
+}
+
+/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  SDMaskUnmaskFunctionIRQ - mask/unmask function IRQ
+  Input:  pDevice - the device/function
+          MaskInt - mask interrupt
+  Output:
+  Return: status
+  Notes:  Note, this function can be called from an ISR or completion context
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+SDIO_STATUS SDMaskUnmaskFunctionIRQ(PSDDEVICE pDevice, BOOL MaskInt)
+{
+    SDIO_STATUS status = SDIO_STATUS_SUCCESS;
+    UINT8       mask;
+    UINT8       controlVal;
+    BOOL        setHcd;
+    PSDREQUEST  pReq = NULL;
+    SDIO_STATUS status2;
+
+    CT_DECLARE_IRQ_SYNC_CONTEXT();
+
+    setHcd = FALSE;
+
+    pReq = AllocateRequest();
+    if (NULL == pReq) {
+        return SDIO_STATUS_NO_RESOURCES;
+    }
+
+    status = _AcquireHcdLock(pDevice->pHcd);
+
+    if (!SDIO_SUCCESS(status)) {
+        FreeRequest(pReq);
+        return status;
+    }
+
+    do {
+
+        if (pDevice->pHcd->CardProperties.Flags & CARD_RAW) {
+            if (!MaskInt) {
+                if (!pDevice->pHcd->IrqsEnabled) {
+                    pReq->pCompletion = RawHcdEnableIrqPseudoComplete;
+                    setHcd = TRUE;
+                    pDevice->pHcd->IrqsEnabled = 1 << 1;
+                }
+            } else {
+                if (pDevice->pHcd->IrqsEnabled) {
+                    pReq->pCompletion = RawHcdDisableIrqPseudoComplete;
+                    setHcd = TRUE;
+                    pDevice->pHcd->IrqsEnabled = 0;
+                }
+            }
+
+            if (setHcd) {
+                    /* hcd IRQ control requests must be synched with outstanding
+                     * bus requests so we issue a pseudo bus request  */
+                pReq->pCompleteContext = pDevice->pHcd;
+                pReq->Flags = SD_PSEUDO_REQ_FLAGS;
+                pReq->Status = SDIO_STATUS_SUCCESS;
+            } else {
+                    /* no request to submit, just free it */
+                FreeRequest(pReq);
+                pReq = NULL;
+            }
+                /* we're done, submit the bus request if any */
+            break;
+        }
+
+        if (!(pDevice->pHcd->CardProperties.Flags & CARD_SDIO)){
+                /* nothing to do if it's not an SDIO card */
+            DBG_ASSERT(FALSE);
+            status = SDIO_STATUS_INVALID_PARAMETER;
+            break;
+        }
+
+        if (!((SDDEVICE_GET_SDIO_FUNCNO(pDevice) >= SDIO_FIRST_FUNCTION_NUMBER) &&
+              (SDDEVICE_GET_SDIO_FUNCNO(pDevice) <= SDIO_LAST_FUNCTION_NUMBER))){
+            status = SDIO_STATUS_INVALID_PARAMETER;
+            DBG_ASSERT(FALSE);
+            break;
+        }
+
+        mask = 1 << SDDEVICE_GET_SDIO_FUNCNO(pDevice);
+        if (!MaskInt) {
+            DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver Unmasking Int, Mask:0x%X\n", mask));
+                /* check interrupts that were enabled on entry */
+            if (0 == pDevice->pHcd->IrqsEnabled) {
+                    /* need to turn on interrupts in HCD */
+                setHcd = TRUE;
+                    /* use this completion routine */
+                pReq->pCompletion = HcdIrqEnableComplete;
+            }
+                /* set the enable bit, in the shadow register */
+            pDevice->pHcd->IrqsEnabled |= mask;
+                /* make sure control value includes the master enable */
+            controlVal = pDevice->pHcd->IrqsEnabled | SDIO_INT_MASTER_ENABLE;
+        } else {
+            DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver Masking Int, Mask:0x%X\n", mask));
+                /* clear the bit */
+            pDevice->pHcd->IrqsEnabled &= ~mask;
+                /* check and see if this clears all the bits */
+            if (0 == pDevice->pHcd->IrqsEnabled){
+                    /* if none of the functions are enabled, clear this register */
+                controlVal = 0;
+                    /* disable in host */
+                setHcd = TRUE;
+                    /* use this completion routine */
+                pReq->pCompletion = HcdIrqDisableComplete;
+            } else {
+                    /* set control value making sure master enable is left on */
+                controlVal = pDevice->pHcd->IrqsEnabled | SDIO_INT_MASTER_ENABLE;
+            }
+        }
+
+        DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver INT_ENABLE_REG value:0x%X\n", controlVal));
+            /* setup bus request to update the mask register */
+        SDIO_SET_CMD52_WRITE_ARG(pReq->Argument,0,SDIO_INT_ENABLE_REG,controlVal);
+        pReq->Command = CMD52;
+        pReq->Flags = SDREQ_FLAGS_TRANS_ASYNC | SDREQ_FLAGS_RESP_SDIO_R5;
+
+        if (setHcd) {
+                /* make this a barrier request and set context*/
+            pReq->Flags |= SDREQ_FLAGS_BARRIER;
+            pReq->pCompleteContext = pDevice->pHcd;
+        } else {
+                /* does not require an update to the HCD  */
+            pReq->pCompleteContext = (PVOID)(UINT32)controlVal;
+            pReq->pCompletion = WriteIntEnableComplete;
+        }
+
+    } while (FALSE);
+
+    status2 = _ReleaseHcdLock(pDevice->pHcd);
+
+    if (pReq != NULL) {
+        if (SDIO_SUCCESS(status)) {
+                /* issue request */
+            IssueRequestToHCD(pDevice->pHcd,pReq);
+        } else {
+            FreeRequest(pReq);
+        }
+    }
+
+    return status;
+}
+
+
+/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  SDSPIModeEnableDisableCRC - Enable/Disable SPI Mode CRC checking
+  Input:  pDevice - the device/function
+          Enable - Enable CRC
+  Output:
+  Return: status
+  Notes:  Note, this function can be called from an ISR or completion context
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+SDIO_STATUS SDSPIModeEnableDisableCRC(PSDDEVICE pDevice,BOOL Enable)
+{
+    SDCONFIG_BUS_MODE_DATA busMode;
+    SDIO_STATUS            status = SDIO_STATUS_SUCCESS;
+    UINT32                 cmdARG = 0;
+
+    if (!SDDEVICE_IS_BUSMODE_SPI(pDevice)) {
+        return SDIO_STATUS_INVALID_PARAMETER;
+    }
+       //??we should make these atomic using a barrier
+
+        /* get the current mode and clock */
+    busMode.BusModeFlags = pDevice->pHcd->CardProperties.BusMode;
+    busMode.ClockRate = pDevice->pHcd->CardProperties.OperBusClock;
+
+    if (Enable) {
+            /* clear the no-CRC flag */
+        busMode.BusModeFlags &= ~SDCONFIG_BUS_MODE_SPI_NO_CRC;
+        cmdARG = SD_CMD59_CRC_ON;
+    } else {
+        busMode.BusModeFlags |= SDCONFIG_BUS_MODE_SPI_NO_CRC;
+        cmdARG = SD_CMD59_CRC_OFF;
+    }
+
+    do {
+            /* issue CMD59 to turn on/off CRC */
+        status = _IssueSimpleBusRequest(pDevice->pHcd,
+                                        CMD59,
+                                        cmdARG,
+                                        SDREQ_FLAGS_RESP_R1,
+                                        NULL);
+        if (!SDIO_SUCCESS(status)) {
+            DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Failed issue CMD59 (arg=0x%X) Err:%d \n",
+                                    cmdARG, status));
+            break;
+        }
+        if (Enable) {
+            DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: CRC Enabled in SPI mode \n"));
+        } else {
+            DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: CRC Disabled in SPI mode \n"));
+        }
+        status = SetOperationalBusMode(pDevice,&busMode);
+        if (!SDIO_SUCCESS(status)) {
+            DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Failed to set SPI NO CRC mode in hcd : Err:%d \n",
+                                    status));
+            break;
+        }
+    } while (FALSE);
+
+    return status;
+}
+
+
+static UINT32 ConvertSPIStatusToSDCardStatus(UINT8 SpiR1, UINT8 SpiR2)
+{
+    UINT32 cardStatus = 0;
+
+    if (SpiR1 != 0) {
+            /* convert the error */
+        if (SpiR1 & SPI_CS_ERASE_RESET) {
+            cardStatus |= SD_CS_ERASE_RESET;
+        }
+        if (SpiR1 & SPI_CS_ILLEGAL_CMD) {
+            cardStatus |= SD_CS_ILLEGAL_CMD_ERR;
+        }
+        if (SpiR1 & SPI_CS_CMD_CRC_ERR) {
+            cardStatus |= SD_CS_PREV_CMD_CRC_ERR;
+        }
+        if (SpiR1 & SPI_CS_ERASE_SEQ_ERR) {
+            cardStatus |= SD_CS_ERASE_SEQ_ERR;
+        }
+        if (SpiR1 & SPI_CS_ADDRESS_ERR) {
+            cardStatus |= SD_CS_ADDRESS_ERR;
+        }
+        if (SpiR1 & SPI_CS_PARAM_ERR) {
+            cardStatus |= SD_CS_CMD_OUT_OF_RANGE;
+        }
+    }
+
+    if (SpiR2 != 0) {
+            /* convert the error */
+        if (SpiR2 & SPI_CS_CARD_IS_LOCKED) {
+            cardStatus |= SD_CS_CARD_LOCKED;
+        }
+        if (SpiR2 & SPI_CS_LOCK_UNLOCK_FAILED) {
+                /* this bit is shared, just set both */
+            cardStatus |= (SD_CS_LK_UNLK_FAILED | SD_CS_WP_ERASE_SKIP);
+        }
+        if (SpiR2 & SPI_CS_ERROR) {
+            cardStatus |= SD_CS_GENERAL_ERR;
+        }
+        if (SpiR2 & SPI_CS_INTERNAL_ERROR) {
+            cardStatus |= SD_CS_CARD_INTERNAL_ERR;
+        }
+        if (SpiR2 & SPI_CS_ECC_FAILED) {
+            cardStatus |= SD_CS_ECC_FAILED;
+        }
+        if (SpiR2 & SPI_CS_WP_VIOLATION) {
+            cardStatus |= SD_CS_WP_ERR;
+        }
+        if (SpiR2 & SPI_CS_ERASE_PARAM_ERR) {
+            cardStatus |= SD_CS_ERASE_PARAM_ERR;
+        }
+        if (SpiR2 & SPI_CS_OUT_OF_RANGE) {
+            cardStatus |= SD_CS_CMD_OUT_OF_RANGE;
+        }
+    }
+
+    return cardStatus;
+}
+/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  ConvertSPI_Response - filter the SPI response and convert it to an SD Response
+  Input:  pReq - request
+  Output: pReq - modified response, if pRespBuffer is not NULL
+          pRespBuffer - converted response (optional)
+  Return:
+  Notes:  This function converts a SPI response into an SD response.  A caller
+          can supply a buffer instead.
+          For SPI bus operation the HCD must send the SPI response as
+          a stream of bytes, the highest byte contains the first received byte from the
+          card.  This function only filters simple responses (R1 primarily).
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+void ConvertSPI_Response(PSDREQUEST pReq, UINT8 *pRespBuffer)
+{
+
+    UINT32  cardStatus;
+
+    if (pReq->Flags & SDREQ_FLAGS_RESP_SPI_CONVERTED) {
+            /* already converted */
+        return;
+    }
+    if (NULL == pRespBuffer) {
+        pRespBuffer = pReq->Response;
+    }
+
+    switch (GET_SDREQ_RESP_TYPE(pReq->Flags)) {
+        case SDREQ_FLAGS_RESP_R1:
+        case SDREQ_FLAGS_RESP_R1B:
+            cardStatus = ConvertSPIStatusToSDCardStatus(GET_SPI_R1_RESP_TOKEN(pReq->Response),
+                                                        0);
+            if (CMD55 == pReq->Command) {
+                    /* we emulate this since SPI does not have such a bit */
+                cardStatus |= SD_CS_APP_CMD;
+            }
+                /* stuff the SD card status */
+            SD_R1_SET_CMD_STATUS(pRespBuffer,cardStatus);
+                /* stuff the command */
+            SD_R1_SET_CMD(pRespBuffer,pReq->Command);
+            pReq->Flags |= SDREQ_FLAGS_RESP_SPI_CONVERTED;
+            break;
+        case SDREQ_FLAGS_RESP_SDIO_R5:
+            {
+                UINT8 respFlags;
+                UINT8 readData;
+
+                readData = GET_SPI_SDIO_R5_RESPONSE_RDATA(pReq->Response);
+                respFlags = GET_SPI_SDIO_R5_RESP_TOKEN(pReq->Response);
+
+                pRespBuffer[SD_R5_RESP_FLAGS_OFFSET] = 0;
+                if (respFlags != 0) {
+                    if (respFlags & SPI_R5_ILLEGAL_CMD) {
+                        pRespBuffer[SD_R5_RESP_FLAGS_OFFSET] |= SD_R5_ILLEGAL_CMD;
+                    }
+                    if (respFlags & SPI_R5_CMD_CRC) {
+                        pRespBuffer[SD_R5_RESP_FLAGS_OFFSET] |= SD_R5_RESP_CMD_ERR;
+                    }
+                    if (respFlags & SPI_R5_FUNC_ERR) {
+                        pRespBuffer[SD_R5_RESP_FLAGS_OFFSET] |= SD_R5_INVALID_FUNC;
+                    }
+                    if (respFlags & SPI_R5_PARAM_ERR) {
+                        pRespBuffer[SD_R5_RESP_FLAGS_OFFSET] |= SD_R5_ARG_RANGE_ERR;
+                    }
+                }
+                    /* stuff read data */
+                pRespBuffer[SD_SDIO_R5_READ_DATA_OFFSET] = readData;
+                    /* stuff the command */
+                SD_R5_SET_CMD(pRespBuffer,pReq->Command);
+            }
+            pReq->Flags |= SDREQ_FLAGS_RESP_SPI_CONVERTED;
+            break;
+        case SDREQ_FLAGS_RESP_R2:
+                /* for CMD13 and ACMD13 , SPI uses it's own R2 response format (2 bytes) */
+                /* the issue of CMD13 needs to change the response flag to R2 */
+            if (CMD13 == pReq->Command) {
+                cardStatus = ConvertSPIStatusToSDCardStatus(
+                                    GET_SPI_R2_RESP_TOKEN(pReq->Response),
+                                    GET_SPI_R2_STATUS_TOKEN(pReq->Response));
+                    /* stuff the SD card status */
+                SD_R1_SET_CMD_STATUS(pRespBuffer,cardStatus);
+                    /* stuff the command */
+                SD_R1_SET_CMD(pRespBuffer,pReq->Command);
+                pReq->Flags |= SDREQ_FLAGS_RESP_SPI_CONVERTED;
+                break;
+            }
+                /* no other commands should be using R2 when using SPI, if they are
+                 * they should be bypassing the filter  */
+            DBG_ASSERT(FALSE);
+            break;
+        default:
+                /* for all others:
+                 *
+                 * SDREQ_FLAGS_RESP_R6 - SPI mode does not use RCA
+                 * SDREQ_FLAGS_RESP_R3 - bus driver handles this internally
+                 * SDREQ_FLAGS_RESP_SDIO_R4 - bus driver handles this internally
+                 *
+                 */
+            DBG_PRINT(SDDBG_ERROR, ("ConvertSPI_Response - invalid response type:0x%2.2X",
+                                    GET_SDREQ_RESP_TYPE(pReq->Flags)));
+            DBG_ASSERT(FALSE);
+            break;
+    }
+}
+
+/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  @function: Check an SD/MMC/SDIO response.
+
+  @function name: SDIO_CheckResponse
+  @prototype: SDIO_STATUS SDIO_CheckResponse(PSDHCD pHcd, PSDREQUEST pReq, SDHCD_RESPONSE_CHECK_MODE CheckMode)
+  @category: HD_Reference
+
+  @input:  pHcd - the host controller definition structure.
+  @input:  pReq - request containing the response
+  @input:  CheckMode - mode
+
+  @return: SDIO_STATUS
+
+  @notes: Host controller drivers must call into this function to validate various command
+          responses before continuing with data transfers or for decoding received SPI tokens.
+          The CheckMode option determines the type of validation to perform.
+          if (CheckMode == SDHCD_CHECK_DATA_TRANS_OK) :
+             The host controller must check the card response to determine whether it
+          is safe to perform a data transfer.  This API only checks commands that
+          involve data transfers and checks various status fields in the command response.
+          If the card cannot accept data, this function will return a non-successful status that
+          should be treated as a request failure.  The host driver should complete the request with the
+          returned status. Host controller should only call this function in preparation for a
+          data transfer.
+          if (CheckMode == SDHCD_CHECK_SPI_TOKEN) :
+             This API checks the SPI token and returns a timeout status if the illegal command bit is
+          set.  This simulates the behavior of SD 1/4 bit operation where illegal commands result in
+          a command timeout.  A driver that supports SPI mode should pass every response to this
+          function to determine the appropriate error status to complete the request with.  If the
+          API returns success, the response indicates that the card accepted the command.
+
+  @example: Checking the response before starting the data transfer :
+        if (SDIO_SUCCESS(status) && (pReq->Flags & SDREQ_FLAGS_DATA_TRANS)) {
+                // check the response to see if we should continue with data
+            status = SDIO_CheckResponse(pHcd, pReq, SDHCD_CHECK_DATA_TRANS_OK);
+            if (SDIO_SUCCESS(status)) {
+                .... start data transfer phase
+            } else {
+               ... card response indicates that the card cannot handle data
+                  // set completion status
+               pRequest->Status = status;
+            }
+        }
+
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  _SDIO_CheckResponse - check response on behalf of the host controller
+  Input:  pHcd - host controller
+          pReq - request containing the response
+          CheckMode - mode
+  Output:
+  Return: status
+  Notes:
+
+    CheckMode == SDHCD_CHECK_DATA_TRANS_OK :
+    The host controller requests a check on the response to determine whether it
+    is okay to perform a data transfer.  This function only filters on commands that
+    involve data.  Host controller should only call this function in preparation for a
+    data transfer.
+
+    CheckMode == SDHCD_CHECK_SPI_TOKEN :
+    The bus driver checks the SPI token and returns a timeout status if the illegal command bit is
+    set.  This simulates the behavior of SD native operation.
+
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+SDIO_STATUS _SDIO_CheckResponse(PSDHCD pHcd, PSDREQUEST pReq, SDHCD_RESPONSE_CHECK_MODE CheckMode)
+{
+    SDIO_STATUS status = SDIO_STATUS_SUCCESS;
+
+    if (CheckMode == SDHCD_CHECK_DATA_TRANS_OK) {
+        UINT32      cardStatus;
+        UINT8       *pResponse;
+        UINT8       convertedResponse[MAX_CARD_RESPONSE_BYTES];
+
+        if (!(pReq->Flags & SDREQ_FLAGS_DATA_TRANS) ||
+             (pReq->Flags & SDREQ_FLAGS_DATA_SKIP_RESP_CHK) ||
+             (GET_SDREQ_RESP_TYPE(pReq->Flags) ==  SDREQ_FLAGS_NO_RESP)) {
+            return SDIO_STATUS_SUCCESS;
+        }
+        pResponse = pReq->Response;
+            /* check SPI mode */
+        if (IS_HCD_BUS_MODE_SPI(pHcd)) {
+            if (!(pReq->Flags & SDREQ_FLAGS_RESP_SKIP_SPI_FILT)) {
+                    /* apply conversion */
+                ConvertSPI_Response(pReq, NULL);
+            } else {
+                    /* temporarily convert the response, without altering the original */
+                ConvertSPI_Response(pReq, convertedResponse);
+                    /* point to the converted one */
+                pResponse = convertedResponse;
+            }
+        }
+
+        switch (GET_SDREQ_RESP_TYPE(pReq->Flags)) {
+            case SDREQ_FLAGS_RESP_R1:
+            case SDREQ_FLAGS_RESP_R1B:
+                cardStatus = SD_R1_GET_CARD_STATUS(pResponse);
+                if (!(cardStatus &
+                     (SD_CS_ILLEGAL_CMD_ERR | SD_CS_CARD_INTERNAL_ERR | SD_CS_GENERAL_ERR))) {
+                        /* okay for data */
+                    break;
+                }
+                    /* figure out what it was */
+                if (cardStatus & SD_CS_ILLEGAL_CMD_ERR) {
+                    status = SDIO_STATUS_DATA_STATE_INVALID;
+                } else {
+                    status = SDIO_STATUS_DATA_ERROR_UNKNOWN;
+                }
+                DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Check Response Error. R1 CardStatus:0x%X \n",
+                                        cardStatus));
+                break;
+            case SDREQ_FLAGS_RESP_SDIO_R5:
+                cardStatus = SD_R5_GET_RESP_FLAGS(pResponse);
+                if (!(cardStatus & SD_R5_CURRENT_CMD_ERRORS)){
+                        /* all okay */
+                    break;
+                }
+
+                status = ConvertCMD52ResponseToSDIOStatus((UINT8)cardStatus);
+                DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: Check Response Error. R5 CardStatus:0x%X \n",
+                                        cardStatus));
+                break;
+            default:
+                break;
+        }
+
+        return status;
+    }
+
+    {
+        UINT8       spiToken;
+
+            /* handle SPI token validation */
+        switch (GET_SDREQ_RESP_TYPE(pReq->Flags)) {
+            case SDREQ_FLAGS_RESP_R2:
+                spiToken = GET_SPI_R2_RESP_TOKEN(pReq->Response);
+                break;
+            case SDREQ_FLAGS_RESP_SDIO_R5:
+                spiToken = GET_SPI_SDIO_R5_RESP_TOKEN(pReq->Response);
+                break;
+            case SDREQ_FLAGS_RESP_R3:
+                spiToken = GET_SPI_R3_RESP_TOKEN(pReq->Response);
+                break;
+            case SDREQ_FLAGS_RESP_SDIO_R4:
+                spiToken = GET_SPI_SDIO_R4_RESP_TOKEN(pReq->Response);
+                break;
+            default:
+                    /* all other tokesn are SPI R1 type */
+                spiToken = GET_SPI_R1_RESP_TOKEN(pReq->Response);
+                break;
+        }
+
+        if ((GET_SDREQ_RESP_TYPE(pReq->Flags) == SDREQ_FLAGS_RESP_SDIO_R5) ||
+            (GET_SDREQ_RESP_TYPE(pReq->Flags) == SDREQ_FLAGS_RESP_SDIO_R4)) {
+                /* handle SDIO status tokens */
+            if ((spiToken & SPI_R5_ILLEGAL_CMD) ||
+                (spiToken & SPI_R5_CMD_CRC)) {
+                status = SDIO_STATUS_BUS_RESP_TIMEOUT;
+            }
+        } else {
+                /* handle all other status tokens */
+            if ((spiToken & SPI_CS_ILLEGAL_CMD) ||
+                (spiToken & SPI_CS_CMD_CRC_ERR)) {
+                status = SDIO_STATUS_BUS_RESP_TIMEOUT;
+            }
+       }
+    }
+
+    return status;
+}
+
diff --git a/drivers/sdio/stack/busdriver/sdio_bus_os.c b/drivers/sdio/stack/busdriver/sdio_bus_os.c
new file mode 100644
index 00000000000..dbdb9554f81
--- /dev/null
+++ b/drivers/sdio/stack/busdriver/sdio_bus_os.c
@@ -0,0 +1,832 @@
+/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+@file: sdio_bus_os.c
+
+@abstract: Linux implementation module
+
+#notes: includes module load and unload functions
+
+@notice: Copyright (c), 2004-2006 Atheros Communications, Inc.
+
+
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 as
+ *  published by the Free Software Foundation;
+ *
+ *  Software distributed under the License is distributed on an "AS
+ *  IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+ *  implied. See the License for the specific language governing
+ *  rights and limitations under the License.
+ *
+ *  Portions of this code were developed with information supplied from the
+ *  SD Card Association Simplified Specifications. The following conditions and disclaimers may apply:
+ *
+ *   The following conditions apply to the release of the SD simplified specification (�Simplified
+ *   Specification�) by the SD Card Association. The Simplified Specification is a subset of the complete
+ *   SD Specification which is owned by the SD Card Association. This Simplified Specification is provided
+ *   on a non-confidential basis subject to the disclaimers below. Any implementation of the Simplified
+ *   Specification may require a license from the SD Card Association or other third parties.
+ *   Disclaimers:
+ *   The information contained in the Simplified Specification is presented only as a standard
+ *   specification for SD Cards and SD Host/Ancillary products and is provided "AS-IS" without any
+ *   representations or warranties of any kind. No responsibility is assumed by the SD Card Association for
+ *   any damages, any infringements of patents or other right of the SD Card Association or any third
+ *   parties, which may result from its use. No license is granted by implication, estoppel or otherwise
+ *   under any patent or other rights of the SD Card Association or any third party. Nothing herein shall
+ *   be construed as an obligation by the SD Card Association to disclose or distribute any technical
+ *   information, know-how or other confidential information to any third party.
+ *
+ *
+ *  The initial developers of the original code are Seung Yi and Paul Lever
+ *
+ *  sdio@atheros.com
+ *
+ *
+
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+/* debug level for this module*/
+#define DBG_DECLARE 3;
+
+#include <linux/sdio/ctsystem.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/init.h>
+#include <linux/workqueue.h>
+#include <linux/delay.h>
+#include <linux/kthread.h>
+#include <linux/pnp.h>
+void pnp_remove_card_device(struct pnp_dev *dev);
+#include <linux/sdio/sdio_busdriver.h>
+#include <linux/sdio/sdio_lib.h>
+#include "_busdriver.h"
+
+#define DESCRIPTION "SDIO Bus Driver"
+#define AUTHOR "Atheros Communications, Inc."
+
+/* debug print parameter */
+/* configuration and default parameters */
+static int RequestRetries = SDMMC_DEFAULT_CMD_RETRIES;
+module_param(RequestRetries, int, 0644);
+MODULE_PARM_DESC(RequestRetries, "number of command retries");
+static int CardReadyPollingRetry = SDMMC_DEFAULT_CARD_READY_RETRIES;
+module_param(CardReadyPollingRetry, int, 0644);
+MODULE_PARM_DESC(CardReadyPollingRetry, "number of card ready retries");
+static int PowerSettleDelay = SDMMC_POWER_SETTLE_DELAY;
+module_param(PowerSettleDelay, int, 0644);
+MODULE_PARM_DESC(PowerSettleDelay, "delay in ms for power to settle after power changes");
+static int DefaultOperClock = 52000000;
+module_param(DefaultOperClock, int, 0644);
+MODULE_PARM_DESC(DefaultOperClock, "maximum operational clock limit");
+static int DefaultBusMode = SDCONFIG_BUS_WIDTH_4_BIT;
+module_param(DefaultBusMode, int, 0644);
+MODULE_PARM_DESC(DefaultBusMode, "default bus mode: see SDCONFIG_BUS_WIDTH_xxx");
+static int RequestListSize = SDBUS_DEFAULT_REQ_LIST_SIZE;
+module_param(RequestListSize, int, 0644);
+MODULE_PARM_DESC(RequestListSize, "");
+static int SignalSemListSize = SDBUS_DEFAULT_REQ_SIG_SIZE;
+module_param(SignalSemListSize, int, 0644);
+MODULE_PARM_DESC(SignalSemListSize, "");
+static int CDPollingInterval = SDBUS_DEFAULT_CD_POLLING_INTERVAL;
+module_param(CDPollingInterval, int, 0644);
+MODULE_PARM_DESC(CDPollingInterval, "");
+static int DefaultOperBlockLen = SDMMC_DEFAULT_BYTES_PER_BLOCK;
+module_param(DefaultOperBlockLen, int, 0644);
+MODULE_PARM_DESC(DefaultOperBlockLen, "operational block length");
+static int DefaultOperBlockCount = SDMMC_DEFAULT_BLOCKS_PER_TRANS;
+module_param(DefaultOperBlockCount, int, 0644);
+MODULE_PARM_DESC(DefaultOperBlockCount, "operational block count");
+static int ConfigFlags = BD_DEFAULT_CONFIG_FLAGS;
+module_param(ConfigFlags, int, 0644);
+MODULE_PARM_DESC(ConfigFlags, "config flags");
+
+static int HcdRCount = MAX_HCD_REQ_RECURSION;
+module_param(HcdRCount, int, 0644);
+MODULE_PARM_DESC(HcdRCount, "HCD request recursion count");
+
+static void CardDetect_WorkItem(
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)
+void *context);
+#else
+struct work_struct *ignored);
+#endif
+static void CardDetect_TimerFunc(unsigned long Context);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
+static DECLARE_WORK(CardDetectPollWork, CardDetect_WorkItem
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)
+, 0);
+#else
+);
+#endif
+#endif
+static int RegisterDriver(PSDFUNCTION pFunction);
+static int UnregisterDriver(PSDFUNCTION pFunction);
+
+static struct timer_list CardDetectTimer;
+
+#define SDDEVICE_FROM_OSDEVICE(pOSDevice)  container_of(pOSDevice, SDDEVICE, Device)
+#define SDFUNCTION_FROM_OSDRIVER(pOSDriver)  container_of(pOSDriver, SDFUNCTION, Driver)
+
+
+/*
+ * SDIO_RegisterHostController - register a host controller bus driver
+*/
+SDIO_STATUS SDIO_RegisterHostController(PSDHCD pHcd) {
+    /* we are the exported verison, call the internal verison */
+    return _SDIO_RegisterHostController(pHcd);
+}
+
+/*
+ * SDIO_UnregisterHostController - unregister a host controller bus driver
+*/
+SDIO_STATUS SDIO_UnregisterHostController(PSDHCD pHcd) {
+    /* we are the exported verison, call the internal verison */
+    return _SDIO_UnregisterHostController(pHcd);
+}
+
+/*
+ * SDIO_RegisterFunction - register a function driver
+*/
+SDIO_STATUS SDIO_RegisterFunction(PSDFUNCTION pFunction) {
+    int error;
+    SDIO_STATUS status;
+
+    DBG_PRINT(SDDBG_TRACE, ("SDIO BusDriver - SDIO_RegisterFunction\n"));
+
+        /* since we do PnP registration first, we need to check the version */
+    if (!CHECK_FUNCTION_DRIVER_VERSION(pFunction)) {
+        DBG_PRINT(SDDBG_ERROR,
+           ("SDIO Bus Driver: Function Major Version Mismatch (hcd = %d, bus driver = %d)\n",
+           GET_SDIO_STACK_VERSION_MAJOR(pFunction), CT_SDIO_STACK_VERSION_MAJOR(g_Version)));
+        return SDIO_STATUS_INVALID_PARAMETER;
+    }
+
+    /* we are the exported verison, call the internal verison after registering with the bus
+       we handle probes internally to the bus driver */
+    if ((error = RegisterDriver(pFunction)) < 0) {
+        DBG_PRINT(SDDBG_ERROR,
+            ("SDIO BusDriver - SDIO_RegisterFunction, failed to register with system bus driver: %d\n",
+            error));
+        status = OSErrorToSDIOError(error);
+    } else {
+        status = _SDIO_RegisterFunction(pFunction);
+        if (!SDIO_SUCCESS(status)) {
+            UnregisterDriver(pFunction);
+        }
+    }
+
+    return status;
+}
+
+/*
+ * SDIO_UnregisterFunction - unregister a function driver
+*/
+SDIO_STATUS SDIO_UnregisterFunction(PSDFUNCTION pFunction) {
+    SDIO_STATUS status;
+    /* we are the exported verison, call the internal verison */
+    status = _SDIO_UnregisterFunction(pFunction);
+    UnregisterDriver(pFunction);
+    return  status;
+}
+
+/*
+ * SDIO_HandleHcdEvent - tell core an event occurred
+*/
+SDIO_STATUS SDIO_HandleHcdEvent(PSDHCD pHcd, HCD_EVENT Event) {
+    /* we are the exported verison, call the internal verison */
+    DBG_PRINT(SDIODBG_HCD_EVENTS, ("SDIO Bus Driver: SDIO_HandleHcdEvent, event type 0x%X, HCD:0x%X\n",
+                         Event, (UINT)pHcd));
+    return _SDIO_HandleHcdEvent(pHcd, Event);
+}
+
+/* get default settings */
+SDIO_STATUS _SDIO_BusGetDefaultSettings(PBDCONTEXT pBdc)
+{
+    /* these defaults are module params */
+    pBdc->RequestRetries = RequestRetries;
+    pBdc->CardReadyPollingRetry = CardReadyPollingRetry;
+    pBdc->PowerSettleDelay = PowerSettleDelay;
+    pBdc->DefaultOperClock = DefaultOperClock;
+    pBdc->DefaultBusMode = DefaultBusMode;
+    pBdc->RequestListSize = RequestListSize;
+    pBdc->SignalSemListSize = SignalSemListSize;
+    pBdc->CDPollingInterval = CDPollingInterval;
+    pBdc->DefaultOperBlockLen = DefaultOperBlockLen;
+    pBdc->DefaultOperBlockCount = DefaultOperBlockCount;
+    pBdc->ConfigFlags = ConfigFlags;
+    pBdc->MaxHcdRecursion = HcdRCount;
+    return SDIO_STATUS_SUCCESS;
+}
+
+static void CardDetect_TimerFunc(unsigned long Context)
+{
+    DBG_PRINT(SDIODBG_CD_TIMER, ("+ SDIO BusDriver Card Detect Timer\n"));
+
+        /* timers run in an ISR context and cannot block or sleep, so we need
+         * to queue a work item to call the bus driver timer notification */
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
+    if (schedule_work(&CardDetectPollWork) <= 0) {
+        DBG_PRINT(SDDBG_ERROR, ("Failed to queue Card Detect timer!\n"));
+    }
+#else
+    CardDetect_WorkItem(NULL);
+#endif
+    DBG_PRINT(SDIODBG_CD_TIMER, ("- SDIO BusDriver  Card Detect Timer\n"));
+}
+
+/*
+ * Initialize any timers we are using
+*/
+SDIO_STATUS InitializeTimers(void)
+{
+    init_timer(&CardDetectTimer);
+    CardDetectTimer.function = CardDetect_TimerFunc;
+    CardDetectTimer.data = 0;
+    return SDIO_STATUS_SUCCESS;
+}
+
+/*
+ * cleanup timers
+*/
+SDIO_STATUS CleanupTimers(void)
+{
+    del_timer(&CardDetectTimer);
+    return SDIO_STATUS_SUCCESS;
+}
+
+
+/*
+ * Queue a timer, Timeout is in milliseconds
+*/
+SDIO_STATUS QueueTimer(INT TimerID, UINT32 TimeOut)
+{
+    UINT32 delta;
+
+        /* convert timeout to ticks */
+    delta = (TimeOut * HZ)/1000;
+    if (delta == 0) {
+        delta = 1;
+    }
+    DBG_PRINT(SDIODBG_CD_TIMER, ("SDIO BusDriver - SDIO_QueueTimer System Ticks Per Sec:%d \n",HZ));
+    DBG_PRINT(SDIODBG_CD_TIMER, ("SDIO BusDriver - SDIO_QueueTimer TimerID: %d TimeOut:%d MS, requires %d Ticks\n",
+                TimerID,TimeOut,delta));
+    switch (TimerID) {
+        case SDIOBUS_CD_TIMER_ID:
+            CardDetectTimer.expires = jiffies + delta;
+            add_timer(&CardDetectTimer);
+            break;
+        default:
+            return SDIO_STATUS_INVALID_PARAMETER;
+    }
+
+    return SDIO_STATUS_SUCCESS;
+}
+
+/* check a response on behalf of the host controller, to allow it to proceed with a
+ * data transfer */
+SDIO_STATUS SDIO_CheckResponse(PSDHCD pHcd, PSDREQUEST pReq, SDHCD_RESPONSE_CHECK_MODE CheckMode)
+{
+    return _SDIO_CheckResponse(pHcd,pReq,CheckMode);
+}
+
+/*
+ * CardDetect_WorkItem - the work item for handling card detect polling interrupt
+*/
+static void CardDetect_WorkItem(
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)
+void *context)
+#else
+struct work_struct *ignored)
+#endif
+{
+        /* call bus driver function */
+    SDIO_NotifyTimerTriggered(SDIOBUS_CD_TIMER_ID);
+}
+
+/*
+ * OS_IncHcdReference - increment host controller driver reference count
+*/
+SDIO_STATUS Do_OS_IncHcdReference(PSDHCD pHcd)
+{
+    SDIO_STATUS status = SDIO_STATUS_SUCCESS;
+
+    do {
+        if (NULL == pHcd->pModule) {
+                /* hcds that are 2.3 or higher should set this */
+            DBG_PRINT(SDDBG_WARN, ("SDIO Bus Driver: HCD:%s should set module ptr!\n",
+                (pHcd->pName != NULL) ? pHcd->pName : "Unknown"));
+            break;
+        }
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
+        if (!try_module_get(pHcd->pModule)) {
+            status = SDIO_STATUS_ERROR;
+        }
+#else
+        if (!try_inc_mod_count(pHcd->pModule)) {
+            status = SDIO_STATUS_ERROR;
+        }
+#endif
+
+    } while (FALSE);
+
+    if (!SDIO_SUCCESS(status)) {
+        DBG_PRINT(SDDBG_WARN, ("SDIO Bus Driver: HCD:%s failed to get module\n",
+            (pHcd->pName != NULL) ? pHcd->pName : "Unknown"));
+    }
+
+    return status;
+}
+
+/*
+ * OS_DecHcdReference - decrement host controller driver reference count
+*/
+SDIO_STATUS Do_OS_DecHcdReference(PSDHCD pHcd)
+{
+    if (pHcd->pModule != NULL) {
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
+        module_put(pHcd->pModule);
+#else
+            /* 2.4 or lower */
+        __MOD_DEC_USE_COUNT(pHcd->pModule);
+#endif
+    }
+    return SDIO_STATUS_SUCCESS;
+}
+
+/****************************************************************************************/
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
+#include <linux/pnp.h>
+
+#if !defined(CONFIG_PNP)
+#error "CONFIG_PNP not defined"
+#endif
+
+static ULONG InUseDevices = 0;
+static spinlock_t InUseDevicesLock = SPIN_LOCK_UNLOCKED;
+
+static const struct pnp_device_id pnp_idtable[] = {
+    {"SD_XXXX",  0}
+};
+static int sdio_get_resources(struct pnp_dev * pDev, struct pnp_resource_table * res)
+{
+    DBG_PRINT(SDDBG_TRACE,
+        ("SDIO BusDriver - sdio_get_resources: %s\n",
+        pDev->dev.bus_id));
+    return 0;
+}
+static int sdio_set_resources(struct pnp_dev * pDev, struct pnp_resource_table * res)
+{
+    DBG_PRINT(SDDBG_TRACE,
+        ("SDIO BusDriver - sdio_set_resources: %s\n",
+        pDev->dev.bus_id));
+    return 0;
+}
+
+static int sdio_disable_resources(struct pnp_dev *pDev)
+{
+    DBG_PRINT(SDDBG_TRACE,
+        ("SDIO BusDriver - sdio_disable_resources: %s\n",
+        pDev->dev.bus_id));
+    if (pDev != NULL) {
+        pDev->active = 0;
+    }
+    return 0;
+}
+void    release(struct device * pDev) {
+    DBG_PRINT(SDDBG_TRACE,
+        ("SDIO BusDriver - release: %s\n",
+        pDev->bus_id));
+    return;
+}
+struct pnp_protocol sdio_protocol = {
+    .name   = "SDIO",
+    .get    = sdio_get_resources,
+    .set    = sdio_set_resources,
+    .disable = sdio_disable_resources,
+    .dev.release = release,
+};
+
+/*
+ * driver_probe - probe for OS based driver
+*/
+static int driver_probe(struct pnp_dev* pOSDevice, const struct pnp_device_id *pId)
+{
+    PSDDEVICE pDevice = SDDEVICE_FROM_OSDEVICE(pOSDevice);
+    PSDFUNCTION pFunction = pDevice->Device.dev.driver_data;
+
+    if (pFunction == NULL) {
+        return -1;
+    }
+
+    if (strcmp(pFunction->pName, pOSDevice->dev.driver->name) == 0) {
+        DBG_PRINT(SDDBG_TRACE,
+            ("SDIO BusDriver - driver_probe, match: %s/%s driver: %s\n",
+            pOSDevice->dev.bus_id, pFunction->pName, pOSDevice->dev.driver->name));
+        return 1;
+    } else {
+        DBG_PRINT(SDDBG_TRACE,
+            ("SDIO BusDriver - driver_probe, no match: %s/%s driver: %s\n",
+            pOSDevice->dev.bus_id, pFunction->pName, pOSDevice->dev.driver->name));
+        return -1;
+    }
+/*    if (pOSDevice->id != NULL) {
+        if (strcmp(pOSDevice->id->id, pId->id) == 0) {
+            DBG_PRINT(SDDBG_TRACE,
+                ("SDIO BusDriver - driver_probe, match: %s/%s\n",
+                pOSDevice->dev.bus_id, pId->id));
+            return 1;
+        }
+        DBG_PRINT(SDDBG_TRACE,
+            ("SDIO BusDriver - driver_probe, did not match: %s/%s/%s\n",
+            pOSDevice->dev.bus_id, pId->id, pOSDevice->id->id));
+    } else {
+        DBG_PRINT(SDDBG_TRACE,
+            ("SDIO BusDriver - driver_probe, did not match: %s/%s\n",
+            pOSDevice->dev.bus_id, pId->id));
+    }
+    return -1;
+*/
+//??    if (pDevice->Device.dev.driver_data != NULL) {
+//??        if (pDevice->Device.dev.driver_data == pFunction) {
+//??    if (pDevice->Device.data != NULL) {
+//??        if (pDevice->Device.data == pFunction) {
+//??            DBG_PRINT(SDDBG_TRACE,
+//??                ("SDIO BusDriver - driver_probe, match: %s\n",
+//??                pOSDevice->dev.bus_id));
+//??            return 1;
+//??        }
+//??    }
+   DBG_PRINT(SDDBG_TRACE,
+        ("SDIO BusDriver - driver_probe,  match: %s\n",
+        pOSDevice->dev.bus_id));
+    return 1;
+}
+
+static int RegisterDriver(PSDFUNCTION pFunction)
+{
+    memset(&pFunction->Driver, 0, sizeof(pFunction->Driver));
+    pFunction->Driver.name = pFunction->pName;
+    pFunction->Driver.probe = driver_probe;
+    pFunction->Driver.id_table = pnp_idtable;
+    pFunction->Driver.flags = PNP_DRIVER_RES_DO_NOT_CHANGE;
+
+    DBG_PRINT(SDDBG_TRACE,
+            ("SDIO BusDriver - SDIO_RegisterFunction, registering driver: %s\n",
+            pFunction->Driver.name));
+    return pnp_register_driver(&pFunction->Driver);
+}
+
+static int UnregisterDriver(PSDFUNCTION pFunction)
+{
+    DBG_PRINT(SDDBG_TRACE,
+            ("+SDIO BusDriver - UnregisterDriver, driver: %s\n",
+            pFunction->Driver.name));
+    pnp_unregister_driver(&pFunction->Driver);
+    DBG_PRINT(SDDBG_TRACE,
+            ("-SDIO BusDriver - UnregisterDriver\n"));
+   return 0;
+}
+
+/*
+ * OS_InitializeDevice - initialize device that will be registered
+*/
+SDIO_STATUS OS_InitializeDevice(PSDDEVICE pDevice, PSDFUNCTION pFunction)
+{
+    struct pnp_id *pFdname;
+    memset(&pDevice->Device, 0, sizeof(pDevice->Device));
+    pDevice->Device.dev.driver_data = (PVOID)pFunction;
+//??    pDevice->Device.data = (PVOID)pFunction;
+//??    pDevice->Device.dev.driver = &pFunction->Driver.driver;
+//??    pDevice->Device.driver = &pFunction->Driver;
+//??    pDevice->Device.dev.release = release;
+    /* get a unique device number, must be done with locks held */
+    spin_lock(&InUseDevicesLock);
+    pDevice->Device.number = FirstClearBit(&InUseDevices);
+    SetBit(&InUseDevices, pDevice->Device.number);
+    spin_unlock(&InUseDevicesLock);
+    pDevice->Device.capabilities = PNP_REMOVABLE | PNP_DISABLE;
+    pDevice->Device.protocol = &sdio_protocol;
+    pDevice->Device.active = 1;
+
+    pnp_init_resource_table(&pDevice->Device.res);
+
+    pFdname = KernelAlloc(sizeof(struct pnp_id));
+
+    if (NULL == pFdname) {
+        return SDIO_STATUS_NO_RESOURCES;
+    }
+    /* set the id as slot number/function number */
+    snprintf(pFdname->id, sizeof(pFdname->id), "SD_%02X%02X",
+             pDevice->pHcd->SlotNumber, (UINT)SDDEVICE_GET_SDIO_FUNCNO(pDevice));
+    pFdname->next = NULL;
+    DBG_PRINT(SDDBG_TRACE, ("SDIO BusDriver - OS_InitializeDevice adding id: %s\n",
+                             pFdname->id));
+    pnp_add_id(pFdname, &pDevice->Device);
+
+        /* deal with DMA settings */
+    if (pDevice->pHcd->pDmaDescription != NULL) {
+        pDevice->Device.dev.dma_mask = &pDevice->pHcd->pDmaDescription->Mask;
+        pDevice->Device.dev.coherent_dma_mask = pDevice->pHcd->pDmaDescription->Mask;
+    }
+
+    return SDIO_STATUS_SUCCESS;
+}
+
+/*
+ * OS_AddDevice - must be pre-initialized with OS_InitializeDevice
+*/
+SDIO_STATUS OS_AddDevice(PSDDEVICE pDevice, PSDFUNCTION pFunction)
+{
+    int error;
+    DBG_PRINT(SDDBG_TRACE, ("SDIO BusDriver - OS_AddDevice adding function: %s\n",
+                               pFunction->pName));
+    error = pnp_add_device(&pDevice->Device);
+    if (error < 0) {
+        DBG_PRINT(SDDBG_ERROR, ("SDIO BusDriver - OS_AddDevice failed pnp_add_device: %d\n",
+                               error));
+    }
+        /* replace the buggy pnp's release */
+    pDevice->Device.dev.release = release;
+
+    return OSErrorToSDIOError(error);
+}
+
+/*
+ * OS_RemoveDevice - unregister device with driver and bus
+*/
+void OS_RemoveDevice(PSDDEVICE pDevice)
+{
+    DBG_PRINT(SDDBG_TRACE, ("SDIO BusDriver - OS_RemoveDevice \n"));
+    pnp_remove_card_device(&pDevice->Device);
+    spin_lock(&InUseDevicesLock);
+    ClearBit(&InUseDevices, pDevice->Device.number);
+    spin_unlock(&InUseDevicesLock);
+
+    if (pDevice->Device.id != NULL) {
+        KernelFree(pDevice->Device.id);
+        pDevice->Device.id = NULL;
+    }
+}
+
+/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  @function: Add OS device to bus driver.
+
+  @function name: SDIO_BusAddOSDevice
+  @category: HD_Reference
+
+  @output: pDma    - descrip[tion of support DMA or NULL
+  @output: pDriver - assigned driver object
+  @output: pDevice - assigned device object
+
+  @return: SDIO_STATUS - SDIO_STATUS_SUCCESS when successful.
+
+  @notes: If the HCD does not register with the driver sub-system directly (like in the PCI case),
+          then it should register with the bus driver to obtain OS dependent device objects.
+          All input structures should be maintained throughout the life of the driver.
+
+  @example: getting device objects:
+    typedef struct _SDHCD_DRIVER {
+        OS_PNPDEVICE   HcdDevice;     / * the OS device for this HCD * /
+        OS_PNPDRIVER   HcdDriver;     / * the OS driver for this HCD * /
+        SDDMA_DESCRIPTION Dma;        / * driver DMA description * /
+    }SDHCD_DRIVER, *PSDHCD_DRIVER;
+
+    typedef struct _SDHCD_DRIVER_CONTEXT {
+        PTEXT        pDescription;       / * human readable device decsription * /
+        SDLIST       DeviceList;         / * the list of current devices handled by this driver * /
+        OS_SEMAPHORE DeviceListSem;      / * protection for the DeviceList * /
+        UINT         DeviceCount;        / * number of devices currently installed * /
+        SDHCD_DRIVER Driver;             / * OS dependent driver specific info * /
+    }SDHCD_DRIVER_CONTEXT, *PSDHCD_DRIVER_CONTEXT;
+
+    static SDHCD_DRIVER_CONTEXT HcdContext = {
+        .pDescription  = DESCRIPTION,
+        .DeviceCount   = 0,
+        .Driver.HcdDevice.name = "sdio_xxx_hcd",
+        .Driver.HcdDriver.name = "sdio_xxx_hcd",
+    }
+    .....
+    status = SDIO_BusAddOSDevice(NULL, &HcdContext.Driver, &HcdContext.Device);
+    if (SDIO_SUCCESS(status) {
+        return Probe(&HcdContext.Device);
+    }
+    return SDIOErrorToOSError(status);
+
+  @see also: SDIO_BusRemoveOSDevice
+
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+SDIO_STATUS SDIO_BusAddOSDevice(PSDDMA_DESCRIPTION pDma, POS_PNPDRIVER pDriver, POS_PNPDEVICE pDevice)
+{
+    int err;
+    struct pnp_id *pFdname;
+    struct pnp_device_id *pFdid;
+    static int slotNumber = 0; /* we just use an increasing count for the slots number */
+
+    if (pDma != NULL) {
+        pDevice->dev.dma_mask = &pDma->Mask;
+        pDevice->dev.coherent_dma_mask = pDma->Mask;
+    }
+    DBG_PRINT(SDDBG_ERROR,
+            ("SDIO BusDriver - SDIO_GetBusOSDevice, registering driver: %s DMAmask: 0x%x\n",
+            pDriver->name, (UINT)*pDevice->dev.dma_mask));
+    pFdid = KernelAlloc(sizeof(struct pnp_device_id)*2);
+    /* set the id as slot number/function number */
+    snprintf(pFdid[0].id, sizeof(pFdid[0].id), "SD_%02X08",
+             slotNumber++);
+    pFdid[0].driver_data = 0;
+    pFdid[1].id[0] = '\0';
+    pFdid[1].driver_data = 0;
+
+    pDriver->id_table = pFdid;
+    pDriver->flags = PNP_DRIVER_RES_DO_NOT_CHANGE;
+    err = pnp_register_driver(pDriver);
+    if (err < 0) {
+        DBG_PRINT(SDDBG_ERROR,
+            ("SDIO BusDriver - SDIO_GetBusOSDevice, failed registering driver: %s, err: %d\n",
+            pDriver->name, err));
+        return OSErrorToSDIOError(err);
+    }
+
+    pDevice->protocol = &sdio_protocol;
+    pDevice->capabilities = PNP_REMOVABLE | PNP_DISABLE;
+    pDevice->active = 1;
+
+    pFdname = KernelAlloc(sizeof(struct pnp_id));
+    /* set the id as slot number/function number */
+    snprintf(pFdname->id, sizeof(pFdname->id), "SD_%02X08",
+             0); //??pDevice->pHcd->SlotNumber);//?????fix this, slotnumber isn't vaialble yet
+    pFdname->next = NULL;
+    pnp_add_id(pFdname, pDevice);
+
+    /* get a unique device number */
+    spin_lock(&InUseDevicesLock);
+    pDevice->number = FirstClearBit(&InUseDevices);
+    SetBit(&InUseDevices, pDevice->number);
+    spin_unlock(&InUseDevicesLock);
+    pnp_init_resource_table(&pDevice->res);
+    err = pnp_add_device(pDevice);
+    if (err < 0) {
+        DBG_PRINT(SDDBG_ERROR, ("SDIO BusDriver - SDIO_GetBusOSDevice failed pnp_device_add: %d\n",
+                               err));
+        pnp_unregister_driver(pDriver);
+    }
+    /* replace the buggy pnp's release */
+    pDevice->dev.release = release;
+    return OSErrorToSDIOError(err);
+}
+
+/**+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  @function: Return OS device from bus driver.
+
+  @function name: SDIO_BusRemoveOSDevice
+  @category: HD_Reference
+
+  @input: pDriver - setup PNP driver object
+  @input: pDevice - setup PNP device object
+
+  @return: none
+
+
+  @example: returning device objects:
+        SDIO_BusRemoveOSDevice(&HcdContext.Driver, &HcdContext.Device);
+
+
+  @see also: SDIO_BusAddOSDevice
+
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+void SDIO_BusRemoveOSDevice(POS_PNPDRIVER pDriver, POS_PNPDEVICE pDevice)
+{
+    DBG_PRINT(SDDBG_ERROR,
+            ("SDIO BusDriver - SDIO_PutBusOSDevice, unregistering driver: %s\n",
+            pDriver->name));
+
+    pnp_remove_card_device(pDevice);
+    if (pDevice->id != NULL) {
+        KernelFree(pDevice->id);
+        pDevice->id = NULL;
+    }
+
+    spin_lock(&InUseDevicesLock);
+    ClearBit(&InUseDevices, pDevice->number);
+    spin_unlock(&InUseDevicesLock);
+
+    pnp_unregister_driver(pDriver);
+    if (pDriver->id_table != NULL) {
+        KernelFree((void *)pDriver->id_table);
+        pDriver->id_table = NULL;
+    }
+
+}
+
+
+/*
+ * module init
+*/
+static int __init sdio_busdriver_init(void) {
+    SDIO_STATUS status;
+    int error;
+    REL_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: loaded\n"));
+    if (!SDIO_SUCCESS((status = _SDIO_BusDriverInitialize()))) {
+        return SDIOErrorToOSError(status);
+    }
+    /* register the sdio bus */
+    error = pnp_register_protocol(&sdio_protocol);
+    if (error < 0) {
+        REL_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: failed to register bus device, %d\n", error));
+        _SDIO_BusDriverCleanup();
+        return error;
+    }
+    return 0;
+}
+
+/*
+ * module cleanup
+*/
+static void __exit sdio_busdriver_cleanup(void) {
+    REL_PRINT(SDDBG_TRACE, ("SDIO unloaded\n"));
+    _SDIO_BusDriverCleanup();
+    pnp_unregister_protocol(&sdio_protocol);
+DBG_PRINT(SDDBG_TRACE,
+            ("SDIO BusDriver - unloaded 1\n"));
+}
+EXPORT_SYMBOL(SDIO_BusAddOSDevice);
+EXPORT_SYMBOL(SDIO_BusRemoveOSDevice);
+
+#elif LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
+    /* 2.4 */
+static int RegisterDriver(PSDFUNCTION pFunction)
+{
+    return 0;
+}
+
+static int UnregisterDriver(PSDFUNCTION pFunction)
+{
+    DBG_PRINT(SDDBG_TRACE,
+            ("+-SDIO BusDriver - UnregisterDriver, driver: \n"));
+   return 0;
+}
+
+/*
+ * OS_InitializeDevice - initialize device that will be registered
+*/
+SDIO_STATUS OS_InitializeDevice(PSDDEVICE pDevice, PSDFUNCTION pFunction)
+{
+    return SDIO_STATUS_SUCCESS;
+}
+
+/*
+ * OS_AddDevice - must be pre-initialized with OS_InitializeDevice
+*/
+SDIO_STATUS OS_AddDevice(PSDDEVICE pDevice, PSDFUNCTION pFunction)
+{
+    DBG_PRINT(SDDBG_TRACE, ("SDIO BusDriver - OS_AddDevice adding function: %s\n",
+                               pFunction->pName));
+    return SDIO_STATUS_SUCCESS;
+
+}
+
+/*
+ * OS_RemoveDevice - unregister device with driver and bus
+*/
+void OS_RemoveDevice(PSDDEVICE pDevice)
+{
+    DBG_PRINT(SDDBG_TRACE, ("SDIO BusDriver - OS_RemoveDevice \n"));
+}
+
+/*
+ * module init
+*/
+static int __init sdio_busdriver_init(void) {
+    SDIO_STATUS status;
+    REL_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: loaded\n"));
+    if (!SDIO_SUCCESS((status = _SDIO_BusDriverInitialize()))) {
+        return SDIOErrorToOSError(status);
+    }
+    return 0;
+}
+
+/*
+ * module cleanup
+*/
+static void __exit sdio_busdriver_cleanup(void) {
+    REL_PRINT(SDDBG_TRACE, ("SDIO unloaded\n"));
+    _SDIO_BusDriverCleanup();
+}
+#else  ////KERNEL_VERSION
+#error "unsupported kernel version: "UTS_RELEASE
+#endif //KERNEL_VERSION
+
+MODULE_LICENSE("GPL and additional rights");
+MODULE_DESCRIPTION(DESCRIPTION);
+MODULE_AUTHOR(AUTHOR);
+
+module_init(sdio_busdriver_init);
+module_exit(sdio_busdriver_cleanup);
+EXPORT_SYMBOL(SDIO_RegisterHostController);
+EXPORT_SYMBOL(SDIO_UnregisterHostController);
+EXPORT_SYMBOL(SDIO_HandleHcdEvent);
+EXPORT_SYMBOL(SDIO_CheckResponse);
+EXPORT_SYMBOL(SDIO_RegisterFunction);
+EXPORT_SYMBOL(SDIO_UnregisterFunction);
diff --git a/drivers/sdio/stack/busdriver/sdio_function.c b/drivers/sdio/stack/busdriver/sdio_function.c
new file mode 100644
index 00000000000..78b8e17999a
--- /dev/null
+++ b/drivers/sdio/stack/busdriver/sdio_function.c
@@ -0,0 +1,715 @@
+/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+@file: sdio_function.c
+
+@abstract: OS independent bus driver support for function drivers
+
+@notes: This file supports the interface between SDIO function drivers and the bus driver.
+
+@notice: Copyright (c), 2004-2005 Atheros Communications, Inc.
+
+
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 as
+ *  published by the Free Software Foundation;
+ *
+ *  Software distributed under the License is distributed on an "AS
+ *  IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+ *  implied. See the License for the specific language governing
+ *  rights and limitations under the License.
+ *
+ *  Portions of this code were developed with information supplied from the
+ *  SD Card Association Simplified Specifications. The following conditions and disclaimers may apply:
+ *
+ *   The following conditions apply to the release of the SD simplified specification (�Simplified
+ *   Specification�) by the SD Card Association. The Simplified Specification is a subset of the complete
+ *   SD Specification which is owned by the SD Card Association. This Simplified Specification is provided
+ *   on a non-confidential basis subject to the disclaimers below. Any implementation of the Simplified
+ *   Specification may require a license from the SD Card Association or other third parties.
+ *   Disclaimers:
+ *   The information contained in the Simplified Specification is presented only as a standard
+ *   specification for SD Cards and SD Host/Ancillary products and is provided "AS-IS" without any
+ *   representations or warranties of any kind. No responsibility is assumed by the SD Card Association for
+ *   any damages, any infringements of patents or other right of the SD Card Association or any third
+ *   parties, which may result from its use. No license is granted by implication, estoppel or otherwise
+ *   under any patent or other rights of the SD Card Association or any third party. Nothing herein shall
+ *   be construed as an obligation by the SD Card Association to disclose or distribute any technical
+ *   information, know-how or other confidential information to any third party.
+ *
+ *
+ *  The initial developers of the original code are Seung Yi and Paul Lever
+ *
+ *  sdio@atheros.com
+ *
+ *
+
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+#define MODULE_NAME  SDBUSDRIVER
+#include <linux/sdio/ctsystem.h>
+#include <linux/sdio/sdio_busdriver.h>
+#include <linux/sdio/sdio_lib.h>
+#include "_busdriver.h"
+
+static SDIO_STATUS ProbeForDevice(PSDFUNCTION pFunction);
+
+#ifdef CT_MAN_CODE_CHECK
+static UINT16 ManCodeCheck = CT_MAN_CODE_CHECK;
+#endif
+
+/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  @function: Register a function driver with the bus driver.
+
+  @function name: SDIO_RegisterFunction
+  @prototype: SDIO_STATUS SDIO_RegisterFunction(PSDFUNCTION pFunction)
+  @category: PD_Reference
+  @input:  pFunction - the function definition structure.
+
+  @output: none
+
+  @return: SDIO_STATUS - SDIO_STATUS_SUCCESS when succesful.
+
+  @notes: Each function driver must register with the bus driver once upon loading.
+          The calling function must be prepared to receive a Probe callback before
+          this function returns. This will occur when an perpheral device is already
+          pluugged in that is supported by this function.
+          The function driver should unregister itself when exiting.
+          The bus driver checks for possible function drivers to support a device
+          in reverse registration order.
+
+  @example: Registering a function driver:
+            //list of devices supported by this function driver
+       static SD_PNP_INFO Ids[] = {
+            {.SDIO_ManufacturerID = 0xaa55,
+             .SDIO_ManufacturerCode = 0x5555,
+             .SDIO_FunctionNo = 1},
+            {}                      //list is null termintaed
+        };
+        static GENERIC_FUNCTION_CONTEXT FunctionContext = {
+            .Function.pName    = "sdio_generic", //name of the device
+            .Function.Version  = CT_SDIO_STACK_VERSION_CODE, // set stack version
+            .Function.MaxDevices = 1,    //maximum number of devices supported by this driver
+            .Function.NumDevices = 0,    //current number of devices, always zero to start
+            .Function.pIds     = Ids,    //the list of devices supported by this device
+            .Function.pProbe   = Probe,  //pointer to the function drivers Probe function
+                                         //  that will be called when a possibly supported device
+                                         //  is inserted.
+            .Function.pRemove  = Remove, //pointer to the function drivers Remove function
+                                         /  that will be called when a device is removed.
+            .Function.pContext = &FunctionContext, //data value that will be passed into Probe and
+                                         //  Remove callbacks.
+        };
+        SDIO_STATUS status;
+        status = SDIO_RegisterFunction(&FunctionContext.Function)
+        if (!SDIO_SUCCESS(status)) {
+            ...failed to register
+        }
+
+  @see also: SDIO_UnregisterFunction
+
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+SDIO_STATUS _SDIO_RegisterFunction(PSDFUNCTION pFunction)
+{
+	SDIO_STATUS status = SDIO_STATUS_SUCCESS;
+
+#ifdef CT_MAN_CODE_CHECK
+    DBG_PRINT(SDDBG_TRACE,
+        ("SDIO Bus Driver: _SDIO_RegisterFunction: WARNING, this version is locked to Memory cards and SDIO cards with JEDEC IDs of: 0x%X\n",
+            ManCodeCheck));
+#else
+    DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: _SDIO_RegisterFunction\n"));
+#endif
+
+	DBG_PRINT(SDDBG_TRACE, ("+SDIO Bus Driver: Function Driver Stack Version: %d.%d \n",
+        GET_SDIO_STACK_VERSION_MAJOR(pFunction),GET_SDIO_STACK_VERSION_MINOR(pFunction)));
+
+    if (!CHECK_FUNCTION_DRIVER_VERSION(pFunction)) {
+        DBG_PRINT(SDDBG_ERROR,
+           ("SDIO Bus Driver: Function Major Version Mismatch (hcd = %d, bus driver = %d)\n",
+           GET_SDIO_STACK_VERSION_MAJOR(pFunction), CT_SDIO_STACK_VERSION_MAJOR(g_Version)));
+        return SDIO_STATUS_INVALID_PARAMETER;
+    }
+
+
+	/* sanity check the driver */
+	if ((pFunction == NULL) ||
+		(pFunction->pProbe == NULL) ||
+		(pFunction->pIds == NULL)) {
+        DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: _SDIO_RegisterFunction, invalid registration data\n"));
+	    return SDIO_STATUS_INVALID_PARAMETER;
+	}
+    /* protect the function list and add the function */
+    if (!SDIO_SUCCESS((status = SemaphorePendInterruptable(&pBusContext->FunctionListSem)))) {
+      goto cleanup;   /* wait interrupted */
+    }
+    SignalInitialize(&pFunction->CleanupReqSig);
+    SDLIST_INIT(&pFunction->DeviceList);
+    SDListAdd(&pBusContext->FunctionList, &pFunction->SDList);
+    if (!SDIO_SUCCESS((status = SemaphorePost(&pBusContext->FunctionListSem)))) {
+      goto cleanup;   /* wait interrupted */
+    }
+
+	/* see if we have devices for this new function driver */
+	ProbeForDevice(pFunction);
+
+	return status;
+cleanup:
+    DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: _SDIO_RegisterFunction, error exit 0x%X\n", status));
+    return status;
+}
+
+/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  @function: Unregister a function driver with the bus driver.
+
+  @function name: SDIO_UnregisterFunction
+  @prototype: SDIO_STATUS SDIO_UnregisterFunction(PSDFUNCTION pFunction)
+  @category: PD_Reference
+
+  @input:  pFunction - the function definition structure.
+
+  @output: none
+
+  @return: SDIO_STATUS - SDIO_STATUS_SUCCESS when succesful.
+
+  @notes: Each function driver must unregister from the bus driver when the function driver
+          exits.
+          A function driver must disconnect from any interrupts before calling this function.
+
+  @example: Unregistering a function driver:
+        SDIO_UnregisterFunction(&FunctionContext.Function);
+
+  @see also: SDIO_RegisterFunction
+
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+SDIO_STATUS _SDIO_UnregisterFunction(PSDFUNCTION pFunction)
+{
+    SDIO_STATUS status = SDIO_STATUS_SUCCESS;
+    PSDDEVICE pDevice;
+
+    DBG_PRINT(SDDBG_TRACE, ("+SDIO Bus Driver: _SDIO_UnregisterFunction\n"));
+
+    /* protect the function list and synchronize with Probe() and Remove()*/
+    if (!SDIO_SUCCESS((status = SemaphorePendInterruptable(&pBusContext->FunctionListSem)))) {
+        goto cleanup;   /* wait interrupted */
+    }
+        /* remove this function from the function list */
+    SDListRemove(&pFunction->SDList);
+        /* now remove this function as the handler for any of its devices */
+    SDITERATE_OVER_LIST_ALLOW_REMOVE(&pFunction->DeviceList, pDevice, SDDEVICE,FuncListLink)  {
+        if (pDevice->pFunction == pFunction) {
+                /* notify removal */
+            NotifyDeviceRemove(pDevice);
+        }
+    }SDITERATE_END;
+
+    SignalDelete(&pFunction->CleanupReqSig);
+
+    if (!SDIO_SUCCESS((status = SemaphorePost(&pBusContext->FunctionListSem)))) {
+        goto cleanup;   /* wait interrupted */
+    }
+    DBG_PRINT(SDDBG_TRACE, ("-SDIO Bus Driver: _SDIO_UnregisterFunction\n"));
+	return status;
+
+cleanup:
+    DBG_PRINT(SDDBG_ERROR, ("-SDIO Bus Driver: _SDIO_UnregisterFunction, error exit 0x%X\n", status));
+    return status;
+}
+
+/* documentation headers only for Probe and Remove */
+/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  @function: This function is called by the Busdriver when a device is inserted that can be supported by this function driver.
+
+  @function name: Probe
+  @prototype: BOOL (*pProbe)(struct _SDFUNCTION *pFunction, struct _SDDEVICE *pDevice)
+  @category: PD_Reference
+
+  @input:  pFunction - the function definition structure that was passed to Busdriver
+                       via the SDIO_RegisterFunction.
+  @input:  pDevice   - the description of the newly inserted device.
+
+  @output: none
+
+  @return: TRUE  - this function driver will suport this device
+           FALSE - this function driver will not support this device
+
+  @notes: The Busdriver calls the Probe function of a function driver to inform it that device is
+          available for the function driver to control. The function driver should initialize the
+          device and be pepared to acceopt any interrupts from the device before returning.
+
+  @example: Example of typical Probe function callback:
+  static BOOL Probe(PSDFUNCTION pFunction, PSDDEVICE pDevice) {
+       ...get the our context info passed into the SDIO_RegisterFunction
+    PSDXXX_DRIVER_CONTEXT pFunctionContext =
+                                (PSDXXX_DRIVER_CONTEXT)pFunction->pContext;
+    SDIO_STATUS status;
+       //test the identification of this device and ensure we want to support it
+       // we can test based on class, or use more specific tests on SDIO_ManufacturerID, etc.
+    if (pDevice->pId[0].SDIO_FunctionClass == XXX) {
+        DBG_PRINT(SDDBG_TRACE, ("SDIO XXX Function: Probe - card matched (0x%X/0x%X/0x%X)\n",
+                                pDevice->pId[0].SDIO_ManufacturerID,
+                                pDevice->pId[0].SDIO_ManufacturerCode,
+                                pDevice->pId[0].SDIO_FunctionNo));
+        ...
+
+  @see also: SDIO_RegisterFunction
+  @see also: Remove
+
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+
+BOOL FilterPnpInfo(PSDDEVICE pDevice)
+{
+#ifdef CT_MAN_CODE_CHECK
+    if (pDevice->pId[0].CardFlags & CARD_SDIO) {
+        if (pDevice->pId[0].SDIO_ManufacturerCode != ManCodeCheck) {
+            DBG_PRINT(SDDBG_ERROR,
+             ("SDIO Card with JEDEC ID:0x%X , not Allowed! Driver check halted. "
+              "Please Contact sales@codetelligence.com.\n",
+                    pDevice->pId[0].SDIO_ManufacturerCode));
+            return FALSE;
+        }
+    }
+    return TRUE;
+#else
+    return TRUE;
+#endif
+}
+
+/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  @function: This function is called by the Busdriver when a device controlled by this function
+             function driver is removed.
+
+  @function name: Remove
+  @prototype: void (*pRemove)(struct _SDFUNCTION *pFunction, struct _SDDEVICE *pDevice)
+  @category: PD_Reference
+
+  @input:  pFunction - the function definition structure that was passed to Busdriver
+                       via the SDIO_RegisterFunction.
+  @input:  pDevice   - the description of the device being removed.
+
+  @output: none
+
+  @return: none
+
+  @notes: The Busdriver calls the Remove function of a function driver to inform it that device it
+          was supporting has been removed. The device has already been removed, so no further I/O
+          to the device can be performed.
+
+  @example: Example of typical Remove function callback:
+    void Remove(PSDFUNCTION pFunction, PSDDEVICE pDevice) {
+            // get the our context info passed into the SDIO_RegisterFunction
+        PSDXXX_DRIVER_CONTEXT pFunctionContext =
+                             (PSDXXX_DRIVER_CONTEXT)pFunction->pContext;
+           ...free any acquired resources.
+
+  @see also: SDIO_RegisterFunction
+  @see also: Probe
+
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+
+/*
+ * ProbeForFunction - look for a function driver to handle this card
+ *
+*/
+SDIO_STATUS ProbeForFunction(PSDDEVICE pDevice, PSDHCD pHcd) {
+    SDIO_STATUS status;
+    PSDLIST pList;
+    PSDFUNCTION pFunction;
+
+    DBG_PRINT(SDDBG_TRACE, ("+SDIO Bus Driver: ProbeForFunction\n"));
+    DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: ProbeForFunction - Dump of Device PNP Data: \n"));
+    DBG_PRINT(SDDBG_TRACE, (" Card Flags 0x%X \n", pDevice->pId[0].CardFlags));
+    if (pDevice->pId[0].CardFlags & CARD_SDIO) {
+        DBG_PRINT(SDDBG_TRACE, (" SDIO MANF:      0x%X \n", pDevice->pId[0].SDIO_ManufacturerID));
+        DBG_PRINT(SDDBG_TRACE, (" SDIO MANFCODE:  0x%X \n", pDevice->pId[0].SDIO_ManufacturerCode));
+        DBG_PRINT(SDDBG_TRACE, (" SDIO FuncNo:    %d \n", pDevice->pId[0].SDIO_FunctionNo));
+        DBG_PRINT(SDDBG_TRACE, (" SDIO FuncClass: %d \n", pDevice->pId[0].SDIO_FunctionClass));
+    }
+    if (pDevice->pId[0].CardFlags & (CARD_MMC | CARD_SD)) {
+        DBG_PRINT(SDDBG_TRACE, (" SDMMC MANFID: 0x%X \n",pDevice->pId[0].SDMMC_ManfacturerID));
+        DBG_PRINT(SDDBG_TRACE, (" SDMMC OEMID:  0x%X \n",pDevice->pId[0].SDMMC_OEMApplicationID));
+    }
+
+    if (!FilterPnpInfo(pDevice)) {
+        status = SDIO_STATUS_SUCCESS;
+        goto cleanup;
+    }
+
+    /* protect the function list */
+    if (!SDIO_SUCCESS((status = SemaphorePendInterruptable(&pBusContext->FunctionListSem)))) {
+        goto cleanup;   /* wait interrupted */
+    }
+
+    /* protect against ProbeForDevice */
+    if (!SDIO_SUCCESS((status = SemaphorePendInterruptable(&pBusContext->DeviceListSem)))) {
+            /* release the function list semaphore we just took */
+        SemaphorePost(&pBusContext->FunctionListSem);
+        goto cleanup;
+    }
+
+    if (pDevice->pFunction != NULL) {
+            /* device already has a function driver handling it */
+        DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: ProbeForFunction, device already has function\n"));
+            /* release function list */
+        SemaphorePost(&pBusContext->DeviceListSem);
+            /* release function list */
+        SemaphorePost(&pBusContext->FunctionListSem);
+            /* just return success */
+        status = SDIO_STATUS_SUCCESS;
+        goto cleanup;
+    }
+
+        /* release device list */
+    SemaphorePost(&pBusContext->DeviceListSem);
+
+    /* walk functions looking for one that can handle this device */
+    SDITERATE_OVER_LIST(&pBusContext->FunctionList, pList) {
+        pFunction = CONTAINING_STRUCT(pList, SDFUNCTION, SDList);
+        if (pFunction->NumDevices >=  pFunction->MaxDevices) {
+            /* function can't support any more devices */
+            continue;
+        }
+        DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: ProbeForFunction - checking: %s \n",
+                                pFunction->pName));
+
+        /* see if this function handles this device */
+        if (IsPotentialIdMatch(pDevice->pId, pFunction->pIds)) {
+            if (!FilterPnpInfo(pDevice)) {
+                break;
+            }
+            DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: ProbeForFunction -Got Match, probing: %s \n",
+                                    pFunction->pName));
+            /* we need to setup with the OS bus driver before the probe, so probe can
+              do OS operations. */
+            OS_InitializeDevice(pDevice, pFunction);
+            if (!SDIO_SUCCESS(OS_AddDevice(pDevice, pFunction))) {
+                break;
+            }
+            /* close enough match, ask the function driver if it supports us */
+            if (pFunction->pProbe(pFunction, pDevice)) {
+                /* she accepted the device, add to list */
+                pDevice->pFunction = pFunction;
+                SDListAdd(&pFunction->DeviceList, &pDevice->FuncListLink);
+                pFunction->NumDevices++;
+                break;
+            } else {
+                DBG_PRINT(SDDBG_WARN, ("SDIO Bus Driver: %s did not claim the device \n",
+                  pFunction->pName));
+                /* didn't take this device */
+                OS_RemoveDevice(pDevice);
+            }
+
+        }
+    }
+    if (!SDIO_SUCCESS((status = SemaphorePost(&pBusContext->FunctionListSem)))) {
+        goto cleanup;   /* wait interrupted */
+    }
+    DBG_PRINT(SDDBG_TRACE, ("-SDIO Bus Driver: ProbeForFunction\n"));
+	return status;
+cleanup:
+    DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: ProbeForFunction, error exit 0x%X\n", status));
+    return status;
+}
+
+/*
+ * ProbeForDevice - look for a device that this function driver supports
+ *
+*/
+static SDIO_STATUS ProbeForDevice(PSDFUNCTION pFunction) {
+    SDIO_STATUS status;
+    PSDLIST pList;
+    PSDDEVICE pDevice;
+
+    DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: ProbeForDevice\n"));
+    if (pFunction->NumDevices >=  pFunction->MaxDevices) {
+        /* function can't support any more devices */
+        DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: ProbeForDevice, too many devices in function\n"));
+        return SDIO_STATUS_SUCCESS;
+    }
+
+     /* protect the driver list */
+    if (!SDIO_SUCCESS((status = SemaphorePendInterruptable(&pBusContext->DeviceListSem)))) {
+      goto cleanup;   /* wait interrupted */
+    }
+    /* walk device list */
+    SDITERATE_OVER_LIST(&pBusContext->DeviceList, pList) {
+        pDevice = CONTAINING_STRUCT(pList, SDDEVICE, SDList);
+        if (pDevice->pFunction != NULL) {
+            /* device already has a function driver handling it */
+            DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: ProbeForDevice, device already has function\n"));
+            continue;
+        }
+        /* see if this function handles this device */
+        DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: ProbeForDevice, matching ID:%d %d class:%d\n",
+                                pDevice->pId[0].SDIO_ManufacturerID,
+                                pDevice->pId[0].SDIO_FunctionNo,
+                                pDevice->pId[0].SDIO_FunctionClass));
+        if (IsPotentialIdMatch(pDevice->pId, pFunction->pIds)) {
+            if (!FilterPnpInfo(pDevice)) {
+                break;
+            }
+            /* we need to setup with the OS bus driver before the probe, so probe can
+              do OS operations. */
+            OS_InitializeDevice(pDevice, pFunction);
+            if (!SDIO_SUCCESS(OS_AddDevice(pDevice, pFunction))) {
+                break;
+            }
+            /* close enough match, ask the function driver if it supports us */
+            if (pFunction->pProbe(pFunction, pDevice)) {
+                /* she accepted the device, add to list */
+                pDevice->pFunction = pFunction;
+                SDListAdd(&pFunction->DeviceList, &pDevice->FuncListLink);
+                pFunction->NumDevices++;
+                break;
+            } else {
+                DBG_PRINT(SDDBG_WARN, ("SDIO Bus Driver: %s did not claim the device \n",
+                  pFunction->pName));
+                /* didn't take this device */
+                OS_RemoveDevice(pDevice);
+            }
+        }
+    }
+    if (!SDIO_SUCCESS((status = SemaphorePost(&pBusContext->DeviceListSem)))) {
+      goto cleanup;   /* wait interrupted */
+    }
+
+	return status;
+cleanup:
+    DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: ProbeForDevice, error exit 0x%X\n", status));
+    return status;
+}
+
+#if 0
+static void DumpPnpEntry(PSD_PNP_INFO pInfo)
+{
+    DBG_PRINT(SDDBG_TRACE, ("Function PnpInfo Dump: \n"));
+    DBG_PRINT(SDDBG_TRACE, (" Card Flags      0x%X \n", pInfo->CardFlags));
+    DBG_PRINT(SDDBG_TRACE, (" SDIO MANF:      0x%X \n", pInfo->SDIO_ManufacturerID));
+    DBG_PRINT(SDDBG_TRACE, (" SDIO MANFCODE:  0x%X \n", pInfo->SDIO_ManufacturerCode));
+    DBG_PRINT(SDDBG_TRACE, (" SDIO FuncNo:    %d \n", pInfo->SDIO_FunctionNo));
+    DBG_PRINT(SDDBG_TRACE, (" SDIO FuncClass: %d \n", pInfo->SDIO_FunctionClass));
+    DBG_PRINT(SDDBG_TRACE, (" SDMMC MANFID:   0x%X \n", pInfo->SDMMC_ManfacturerID));
+    DBG_PRINT(SDDBG_TRACE, (" SDMMC OEMID:    0x%X \n", pInfo->SDMMC_OEMApplicationID));
+}
+#endif
+/*
+ * IsPotentialIdMatch - test for potential device match
+ *
+*/
+BOOL IsPotentialIdMatch(PSD_PNP_INFO pIdsDev, PSD_PNP_INFO pIdsFuncList) {
+    PSD_PNP_INFO pTFn;
+	BOOL match = FALSE;
+
+	for (pTFn = pIdsFuncList;!IS_LAST_SDPNPINFO_ENTRY(pTFn);pTFn++) {
+        //DumpPnpEntry(pTFn);
+            /* check specific SDIO Card manufacturer ID, Code and Function number */
+		if ((pIdsDev->SDIO_ManufacturerID != 0) &&
+		    (pTFn->SDIO_ManufacturerID != 0) &&
+		    (pIdsDev->SDIO_ManufacturerID == pTFn->SDIO_ManufacturerID) &&
+		    (pIdsDev->SDIO_ManufacturerCode == pTFn->SDIO_ManufacturerCode) &&
+            ((pIdsDev->SDIO_FunctionNo == pTFn->SDIO_FunctionNo) ||
+             (pTFn->SDIO_FunctionNo == 0)) ) {
+		    match = TRUE;
+            break;
+		}
+            /* check generic function class */
+        if ((pIdsDev->SDIO_FunctionClass != 0) &&
+            (pTFn->SDIO_FunctionClass != 0) &&
+            (pIdsDev->SDIO_FunctionClass == pTFn->SDIO_FunctionClass)) {
+            match = TRUE;
+            break;
+        }
+            /* check specific SDMMC MANFID and APPLICATION ID, NOTE SANDISK
+             * uses a MANFID of zero! */
+        if ((pTFn->SDMMC_OEMApplicationID != 0) &&
+            (pIdsDev->SDMMC_ManfacturerID == pTFn->SDMMC_ManfacturerID) &&
+            (pIdsDev->SDMMC_OEMApplicationID == pTFn->SDMMC_OEMApplicationID)) {
+            match = TRUE;
+            break;
+        }
+
+            /* check generic SD Card */
+        if ((pIdsDev->CardFlags & CARD_SD) &&
+            (pTFn->CardFlags & CARD_SD)){
+            match = TRUE;
+            break;
+        }
+
+            /* check generic MMC Card */
+        if ((pIdsDev->CardFlags & CARD_MMC) &&
+            (pTFn->CardFlags & CARD_MMC)){
+            match = TRUE;
+            break;
+        }
+
+             /* check raw Card */
+        if ((pIdsDev->CardFlags & CARD_RAW) &&
+            (pTFn->CardFlags & CARD_RAW)){
+            match = TRUE;
+            break;
+        }
+	}
+
+    return match;
+}
+
+/*
+ * NotifyDeviceRemove - tell function driver on this device that the device is being removed
+ *
+*/
+SDIO_STATUS NotifyDeviceRemove(PSDDEVICE pDevice) {
+    SDIO_STATUS     status;
+    SDREQUESTQUEUE  cancelQueue;
+    PSDREQUEST      pReq;
+    CT_DECLARE_IRQ_SYNC_CONTEXT();
+
+    InitializeRequestQueue(&cancelQueue);
+
+	if ((pDevice->pFunction != NULL) &&
+        (pDevice->pFunction->pRemove != NULL)){
+        DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: removing device 0x%X\n", (INT)pDevice));
+            /* fail any outstanding requests for this device */
+            /* acquire lock for request queue */
+        status = _AcquireHcdLock(pDevice->pHcd);
+        if (!SDIO_SUCCESS(status)) {
+            return status;
+        }
+            /* mark the function to block any more requests comming down */
+        pDevice->pFunction->Flags |= SDFUNCTION_FLAG_REMOVING;
+            /* walk through HCD queue and remove this function's requests */
+        SDITERATE_OVER_LIST_ALLOW_REMOVE(&pDevice->pHcd->RequestQueue.Queue, pReq, SDREQUEST, SDList) {
+            if (pReq->pFunction == pDevice->pFunction) {
+                /* cancel this request, as this device or function is being removed */
+                /* note that these request are getting completed out of order */
+                DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver - NotifyDeviceRemove: canceling req 0x%X\n", (UINT)pReq));
+                pReq->Status = SDIO_STATUS_CANCELED;
+                    /* remove it from the HCD queue */
+                SDListRemove(&pReq->SDList);
+                    /* add it to the cancel queue */
+                QueueRequest(&cancelQueue, pReq);
+            }
+        }SDITERATE_END;
+
+        status = _ReleaseHcdLock(pDevice->pHcd);
+
+           /* now empty the cancel queue if anything is in there */
+        while (TRUE) {
+            pReq = DequeueRequest(&cancelQueue);
+            if (NULL == pReq) {
+                break;
+            }
+                /* complete the request */
+            DoRequestCompletion(pReq, pDevice->pHcd);
+        }
+            /* re-acquire the lock to deal with the current request */
+        status = _AcquireHcdLock(pDevice->pHcd);
+        if (!SDIO_SUCCESS(status)) {
+            return status;
+        }
+            /* now deal with the current request */
+        pReq = GET_CURRENT_REQUEST(pDevice->pHcd);
+        if ((pReq !=NULL) && (pReq->pFunction == pDevice->pFunction) && (pReq->pFunction != NULL)) {
+            DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver - NotifyDeviceRemove: Outstanding Req 0x%X on HCD: 0x%X.. waiting...\n",
+                (UINT)pReq, (UINT)pDevice->pHcd));
+                /* the outstanding request on this device is for the function being removed */
+            pReq->Flags |= SDREQ_FLAGS_CANCELED;
+                /* wait for this request to get completed normally */
+            status = _ReleaseHcdLock(pDevice->pHcd);
+            SignalWait(&pDevice->pFunction->CleanupReqSig);
+            DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver - NotifyDeviceRemove: Outstanding HCD Req 0x%X completed \n", (UINT)pReq));
+        }  else {
+                /* release lock */
+            status = _ReleaseHcdLock(pDevice->pHcd);
+        }
+
+            /* synchronize with ISR SYNC Handlers */
+	 	status = SemaphorePendInterruptable(&pBusContext->DeviceListSem);
+        if (!SDIO_SUCCESS(status)) {
+            return status;
+        }
+            /* call this devices Remove function */
+        pDevice->pFunction->pRemove(pDevice->pFunction,pDevice);
+        pDevice->pFunction->NumDevices--;
+            /* make sure the sync handler is NULLed out */
+        pDevice->pIrqFunction = NULL;
+        SemaphorePost(&pBusContext->DeviceListSem);
+
+        OS_RemoveDevice(pDevice);
+            /* detach this device from the function list it belongs to */
+        SDListRemove(&pDevice->FuncListLink);
+        pDevice->pFunction->Flags &= ~SDFUNCTION_FLAG_REMOVING;
+		pDevice->pFunction = NULL;
+	}
+	return SDIO_STATUS_SUCCESS;
+}
+
+
+/*
+ * RemoveHcdFunctions - remove all functions attached to an HCD
+ *
+*/
+SDIO_STATUS RemoveHcdFunctions(PSDHCD pHcd) {
+    SDIO_STATUS status;
+    PSDLIST pList;
+    PSDFUNCTION pFunction;
+    PSDDEVICE pDevice;
+    DBG_PRINT(SDDBG_TRACE, ("+SDIO Bus Driver: RemoveHcdFunctions\n"));
+
+    /* walk through the functions and remove the ones associated with this HCD */
+    /* protect the driver list */
+    if (!SDIO_SUCCESS((status = SemaphorePend(&pBusContext->FunctionListSem)))) {
+        goto cleanup;   /* wait interrupted */
+    }
+        /* mark that card is being removed */
+    pHcd->CardProperties.CardState |= CARD_STATE_REMOVED;
+    SDITERATE_OVER_LIST(&pBusContext->FunctionList, pList) {
+        pFunction = CONTAINING_STRUCT(pList, SDFUNCTION, SDList);
+        DBG_PRINT(SDDBG_TRACE, ("SDIO Bus Driver: scanning function 0x%X, %s\n", (INT)pFunction,
+                                (pFunction == NULL)?"NULL":pFunction->pName));
+
+        /* walk the devices on this function and look for a match */
+        SDITERATE_OVER_LIST_ALLOW_REMOVE(&pFunction->DeviceList, pDevice, SDDEVICE,FuncListLink) {
+            if (pDevice->pHcd == pHcd) {
+                /* match, remove it */
+                NotifyDeviceRemove(pDevice);
+            }
+        SDITERATE_END;
+    SDITERATE_END;
+    if (!SDIO_SUCCESS((status = SemaphorePost(&pBusContext->FunctionListSem)))) {
+        goto cleanup;   /* wait interrupted */
+    }
+    DBG_PRINT(SDDBG_TRACE, ("-SDIO Bus Driver: RemoveHcdFunctions\n"));
+    return SDIO_STATUS_SUCCESS;
+
+cleanup:
+    DBG_PRINT(SDDBG_ERROR, ("-SDIO Bus Driver: RemoveHcdFunctions, error exit 0x%X\n", status));
+    return status;
+}
+
+/*
+ * RemoveAllFunctions - remove all functions attached
+ *
+*/
+SDIO_STATUS RemoveAllFunctions()
+{
+    SDIO_STATUS status;
+    PSDLIST pList;
+    PSDHCD pHcd;
+
+    /* walk through the HCDs  */
+    /* protect the driver list */
+    if (!SDIO_SUCCESS((status = SemaphorePend(&pBusContext->HcdListSem)))) {
+        goto cleanup;   /* wait interrupted */
+    }
+    SDITERATE_OVER_LIST(&pBusContext->HcdList, pList) {
+        pHcd = CONTAINING_STRUCT(pList, SDHCD, SDList);
+            /* remove the functions */
+        RemoveHcdFunctions(pHcd);
+    }
+    if (!SDIO_SUCCESS((status = SemaphorePost(&pBusContext->HcdListSem)))) {
+        goto cleanup;   /* wait interrupted */
+    }
+    return SDIO_STATUS_SUCCESS;
+cleanup:
+    DBG_PRINT(SDDBG_ERROR, ("SDIO Bus Driver: RemoveAllFunctions, error exit 0x%X\n", status));
+    return status;
+}
+
diff --git a/drivers/sdio/stack/lib/Makefile b/drivers/sdio/stack/lib/Makefile
new file mode 100644
index 00000000000..44fa03897ea
--- /dev/null
+++ b/drivers/sdio/stack/lib/Makefile
@@ -0,0 +1,2 @@
+obj-$(CONFIG_SDIO) += sdio_lib.o
+sdio_lib-objs := sdio_lib_c.o sdio_lib_os.o
diff --git a/drivers/sdio/stack/lib/_sdio_lib.h b/drivers/sdio/stack/lib/_sdio_lib.h
new file mode 100644
index 00000000000..28762b0f6c2
--- /dev/null
+++ b/drivers/sdio/stack/lib/_sdio_lib.h
@@ -0,0 +1,50 @@
+/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+@file: _sdio_lib.h
+
+@abstract: SDIO Lib internal include
+
+#notes:
+
+@notice: Copyright (c), 2004-2006 Atheros Communications, Inc.
+
+
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 as
+ *  published by the Free Software Foundation;
+ *
+ *  Software distributed under the License is distributed on an "AS
+ *  IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+ *  implied. See the License for the specific language governing
+ *  rights and limitations under the License.
+ *
+ *  Portions of this code were developed with information supplied from the
+ *  SD Card Association Simplified Specifications. The following conditions and disclaimers may apply:
+ *
+ *   The following conditions apply to the release of the SD simplified specification (�Simplified
+ *   Specification�) by the SD Card Association. The Simplified Specification is a subset of the complete
+ *   SD Specification which is owned by the SD Card Association. This Simplified Specification is provided
+ *   on a non-confidential basis subject to the disclaimers below. Any implementation of the Simplified
+ *   Specification may require a license from the SD Card Association or other third parties.
+ *   Disclaimers:
+ *   The information contained in the Simplified Specification is presented only as a standard
+ *   specification for SD Cards and SD Host/Ancillary products and is provided "AS-IS" without any
+ *   representations or warranties of any kind. No responsibility is assumed by the SD Card Association for
+ *   any damages, any infringements of patents or other right of the SD Card Association or any third
+ *   parties, which may result from its use. No license is granted by implication, estoppel or otherwise
+ *   under any patent or other rights of the SD Card Association or any third party. Nothing herein shall
+ *   be construed as an obligation by the SD Card Association to disclose or distribute any technical
+ *   information, know-how or other confidential information to any third party.
+ *
+ *
+ *  The initial developers of the original code are Seung Yi and Paul Lever
+ *
+ *  sdio@atheros.com
+ *
+ *
+
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+#ifndef ___SDIO_LIB_H___
+#define ___SDIO_LIB_H___
+
+#endif /* ___SDIO_LIB_H___*/
diff --git a/drivers/sdio/stack/lib/sdio_lib_c.c b/drivers/sdio/stack/lib/sdio_lib_c.c
new file mode 100644
index 00000000000..4bc5a83ecf6
--- /dev/null
+++ b/drivers/sdio/stack/lib/sdio_lib_c.c
@@ -0,0 +1,908 @@
+/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+@file: sdio_lib_c.c
+
+@abstract: OS independent SDIO library functions
+@category abstract: Support_Reference Support Functions.
+
+@notes: Support functions for device I/O
+
+@notice: Copyright (c), 2004-2005 Atheros Communications, Inc.
+
+
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 as
+ *  published by the Free Software Foundation;
+ *
+ *  Software distributed under the License is distributed on an "AS
+ *  IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+ *  implied. See the License for the specific language governing
+ *  rights and limitations under the License.
+ *
+ *  Portions of this code were developed with information supplied from the
+ *  SD Card Association Simplified Specifications. The following conditions and disclaimers may apply:
+ *
+ *   The following conditions apply to the release of the SD simplified specification (�Simplified
+ *   Specification�) by the SD Card Association. The Simplified Specification is a subset of the complete
+ *   SD Specification which is owned by the SD Card Association. This Simplified Specification is provided
+ *   on a non-confidential basis subject to the disclaimers below. Any implementation of the Simplified
+ *   Specification may require a license from the SD Card Association or other third parties.
+ *   Disclaimers:
+ *   The information contained in the Simplified Specification is presented only as a standard
+ *   specification for SD Cards and SD Host/Ancillary products and is provided "AS-IS" without any
+ *   representations or warranties of any kind. No responsibility is assumed by the SD Card Association for
+ *   any damages, any infringements of patents or other right of the SD Card Association or any third
+ *   parties, which may result from its use. No license is granted by implication, estoppel or otherwise
+ *   under any patent or other rights of the SD Card Association or any third party. Nothing herein shall
+ *   be construed as an obligation by the SD Card Association to disclose or distribute any technical
+ *   information, know-how or other confidential information to any third party.
+ *
+ *
+ *  The initial developers of the original code are Seung Yi and Paul Lever
+ *
+ *  sdio@atheros.com
+ *
+ *
+
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+#define MODULE_NAME  SDLIB_
+
+#include <linux/sdio/ctsystem.h>
+#include <linux/sdio/sdio_busdriver.h>
+#include <linux/sdio/_sdio_defs.h>
+#include <linux/sdio/sdio_lib.h>
+#include "_sdio_lib.h"
+
+#define _Cmd52WriteByteCommon(pDev, Address, pValue) \
+                _SDLIB_IssueCMD52((pDev),0,(Address),(pValue),1,TRUE)
+#define _Cmd52ReadByteCommon(pDev, Address, pValue) \
+                _SDLIB_IssueCMD52((pDev),0,(Address),pValue,1,FALSE)
+#define _Cmd52ReadMultipleCommon(pDev, Address, pBuf,length) \
+                _SDLIB_IssueCMD52((pDev),0,(Address),(pBuf),(length),FALSE)
+
+/* inline version */
+static INLINE void _iSDLIB_SetupCMD52Request(UINT8         FuncNo,
+                                             UINT32        Address,
+                                             BOOL          Write,
+                                             UINT8         WriteData,
+                                             PSDREQUEST    pRequest) {
+    if (Write) {
+        SDIO_SET_CMD52_ARG(pRequest->Argument,CMD52_WRITE,
+                           FuncNo,
+                           CMD52_NORMAL_WRITE,Address,WriteData);
+    } else {
+        SDIO_SET_CMD52_ARG(pRequest->Argument,CMD52_READ,FuncNo,0,Address,0x00);
+    }
+
+    pRequest->Flags = SDREQ_FLAGS_RESP_SDIO_R5;
+    pRequest->Command = CMD52;
+}
+
+/**++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  @function: Setup cmd52 requests
+
+  @function name: SDLIB_SetupCMD52Request
+  @prototype: void SDLIB_SetupCMD52Request(UINT8         FuncNo,
+                                           UINT32        Address,
+                                           BOOL          Write,
+                                           UINT8         WriteData,
+                                           PSDREQUEST    pRequest)
+  @category: PD_Reference
+
+  @input:  FunctionNo - function number.
+  @input:  Address - I/O address, 17-bit register address.
+  @input:  Write  - TRUE if a write operation, FALSE for reads.
+  @input:  WriteData - write data, byte to write if write operation.
+
+  @output: pRequest - request is updated with cmd52 parameters
+
+  @return: none
+
+  @notes: This function does not perform any I/O. For register reads, the completion
+          routine can use the SD_R5_GET_READ_DATA() macro to extract the register value.
+          The routine should also extract the response flags using the SD_R5_GET_RESP_FLAGS()
+          macro and check the flags with the SD_R5_ERRORS mask.
+
+  @example: Getting the register value from the completion routine:
+          flags = SD_R5_GET_RESP_FLAGS(pRequest->Response);
+          if (flags & SD_R5_ERRORS) {
+             ... errors
+          } else {
+             registerValue = SD_R5_GET_READ_DATA(pRequest->Response);
+          }
+
+  @see also: SDLIB_IssueCMD52
+  @see also: SDDEVICE_CALL_REQUEST_FUNC
+
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+void _SDLIB_SetupCMD52Request(UINT8         FuncNo,
+                              UINT32        Address,
+                              BOOL          Write,
+                              UINT8         WriteData,
+                              PSDREQUEST    pRequest)
+{
+    _iSDLIB_SetupCMD52Request(FuncNo,Address,Write,WriteData,pRequest);
+}
+
+/**++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  @function: Issue a CMD52 to read or write a register
+
+  @function name: SDLIB_IssueCMD52
+  @prototype: SDIO_STATUS SDLIB_IssueCMD52(PSDDEVICE     pDevice,
+                                           UINT8         FuncNo,
+                                           UINT32        Address,
+                                           PUINT8        pData,
+                                           INT           ByteCount,
+                                           BOOL          Write)
+  @category: PD_Reference
+  @input: pDevice - the device that is the target of the command.
+  @input: FunctionNo - function number of the target.
+  @input: Address - 17-bit register address.
+  @input: ByteCount - number of bytes to read or write,
+  @input: Write - TRUE if a write operation, FALSE for reads.
+  @input: pData - data buffer for writes.
+
+  @output: pData - data buffer for writes.
+
+  @return: SDIO Status
+
+  @notes:  This function will allocate a request and issue multiple byte reads or writes
+           to satisfy the ByteCount requested.  This function is fully synchronous and will block
+           the caller.
+
+  @see also: SDLIB_SetupCMD52Request
+
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+SDIO_STATUS _SDLIB_IssueCMD52(PSDDEVICE     pDevice,
+                              UINT8         FuncNo,
+                              UINT32        Address,
+                              PUINT8        pData,
+                              INT           ByteCount,
+                              BOOL          Write)
+{
+    SDIO_STATUS status = SDIO_STATUS_SUCCESS;
+
+    PSDREQUEST  pReq = NULL;
+
+    pReq = SDDeviceAllocRequest(pDevice);
+
+    if (NULL == pReq) {
+        return SDIO_STATUS_NO_RESOURCES;
+    }
+
+    while (ByteCount) {
+        _iSDLIB_SetupCMD52Request(FuncNo,Address,Write,*pData,pReq);
+        status = SDDEVICE_CALL_REQUEST_FUNC(pDevice,pReq);
+        if (!SDIO_SUCCESS(status)) {
+            break;
+        }
+
+        status = ConvertCMD52ResponseToSDIOStatus(SD_R5_GET_RESP_FLAGS(pReq->Response));
+        if (!SDIO_SUCCESS(status)) {
+            DBG_PRINT(SDDBG_TRACE, ("SDIO Library: CMD52 resp error: 0x%X \n",
+                                    SD_R5_GET_RESP_FLAGS(pReq->Response)));
+            break;
+        }
+        if (!Write) {
+                /* store the byte */
+            *pData =  SD_R5_GET_READ_DATA(pReq->Response);
+        }
+        pData++;
+        Address++;
+        ByteCount--;
+    }
+
+    SDDeviceFreeRequest(pDevice,pReq);
+    return status;
+}
+
+
+
+/**++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  @function: Find a device's tuple.
+
+  @function name: SDLIB_FindTuple
+  @prototype: SDIO_STATUS SDLIB_FindTuple(PSDDEVICE  pDevice,
+                                          UINT8      Tuple,
+                                          UINT32     *pTupleScanAddress,
+                                          PUINT8     pBuffer,
+                                          UINT8      *pLength)
+
+  @category: PD_Reference
+  @input: pDevice - the device that is the target of the command.
+  @input: Tuple - 8-bit ID of tuple to find
+  @input: pTupleScanAddress - On entry pTupleScanAddress is the adddress to start scanning
+  @input: pLength - length of pBuffer
+
+  @output: pBuffer - storage for tuple
+  @output: pTupleScanAddress - address of the next tuple
+  @output: pLength - length of tuple read
+
+  @return: status
+
+  @notes: It is possible to have the same tuple ID multiple times with different lengths. This function
+          blocks and is fully synchronous.
+
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+SDIO_STATUS _SDLIB_FindTuple(PSDDEVICE  pDevice,
+                             UINT8      Tuple,
+                             UINT32     *pTupleScanAddress,
+                             PUINT8     pBuffer,
+                             UINT8      *pLength)
+{
+    SDIO_STATUS status = SDIO_STATUS_SUCCESS;
+    UINT32      scanStart = *pTupleScanAddress;
+    UINT8       tupleCode;
+    UINT8       tupleLink;
+
+        /* sanity check */
+    if (scanStart < SDIO_CIS_AREA_BEGIN) {
+        return SDIO_STATUS_CIS_OUT_OF_RANGE;
+    }
+
+    while (TRUE) {
+            /* check for end */
+        if (scanStart > SDIO_CIS_AREA_END) {
+            status = SDIO_STATUS_TUPLE_NOT_FOUND;
+            break;
+        }
+            /* get the code */
+        status = _Cmd52ReadByteCommon(pDevice, scanStart, &tupleCode);
+        if (!SDIO_SUCCESS(status)) {
+            break;
+        }
+        if (CISTPL_END == tupleCode) {
+                /* found the end */
+            status = SDIO_STATUS_TUPLE_NOT_FOUND;
+            break;
+        }
+            /* bump past tuple code */
+        scanStart++;
+            /* get the tuple link value */
+        status = _Cmd52ReadByteCommon(pDevice, scanStart, &tupleLink);
+        if (!SDIO_SUCCESS(status)) {
+            break;
+        }
+            /* bump past tuple link*/
+        scanStart++;
+            /* check tuple we just found */
+        if (tupleCode == Tuple) {
+             DBG_PRINT(SDDBG_TRACE, ("SDIO Library: Tuple:0x%2.2X Found at Address:0x%X, TupleLink:0x%X \n",
+                                     Tuple, (scanStart - 2), tupleLink));
+            if (tupleLink != CISTPL_LINK_END) {
+                    /* return the next scan address to the caller */
+                *pTupleScanAddress = scanStart + tupleLink;
+            } else {
+                    /* the tuple link is an end marker */
+                *pTupleScanAddress = 0xFFFFFFFF;
+            }
+                /* go get the tuple */
+            status = _Cmd52ReadMultipleCommon(pDevice, scanStart,pBuffer,min(*pLength,tupleLink));
+            if (SDIO_SUCCESS(status)) {
+                    /* set the actual return length */
+                *pLength = min(*pLength,tupleLink);
+            }
+                /* break out of loop */
+            break;
+        }
+            /*increment past this entire tuple */
+        scanStart += tupleLink;
+    }
+
+    return status;
+}
+
+/**++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  @function: Issue an SDIO configuration command.
+
+  @function name: SDLIB_IssueConfig
+  @prototype: SDIO_STATUS _SDLIB_IssueConfig(PSDDEVICE        pDevice,
+                                             SDCONFIG_COMMAND Command,
+                                             PVOID            pData,
+                                             INT              Length)
+
+  @category: PD_Reference
+  @input:  pDevice - the device that is the target of the command.
+  @input:  Command - command to send, see example.
+  @input:  pData - command's data
+  @input:  Length length of pData
+
+  @output: pData - updated on commands that return data.
+
+  @return: SDIO Status
+
+  @example: Command and data pairs:
+            Type                               Data
+            SDCONFIG_GET_WP             SDCONFIG_WP_VALUE
+            SDCONFIG_SEND_INIT_CLOCKS   none
+            SDCONFIG_SDIO_INT_CTRL      SDCONFIG_SDIO_INT_CTRL_DATA
+            SDCONFIG_SDIO_REARM_INT     none
+            SDCONFIG_BUS_MODE_CTRL      SDCONFIG_BUS_MODE_DATA
+            SDCONFIG_POWER_CTRL         SDCONFIG_POWER_CTRL_DATA
+
+  @notes:
+
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+SDIO_STATUS _SDLIB_IssueConfig(PSDDEVICE        pDevice,
+                               SDCONFIG_COMMAND Command,
+                               PVOID            pData,
+                               INT              Length)
+{
+    SDCONFIG  configHdr;
+    SET_SDCONFIG_CMD_INFO(&configHdr,Command,pData,Length);
+    return SDDEVICE_CALL_CONFIG_FUNC(pDevice,&configHdr);
+}
+
+/**++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  @function: Set function block size
+
+  @function name: SDLIB_SetFunctionBlockSize
+  @prototype: SDIO_STATUS SDLIB_SetFunctionBlockSize(PSDDEVICE        pDevice,
+                                                     UINT16           BlockSize)
+
+  @category: PD_Reference
+  @input:  pDevice - the device that is the target of the command.
+  @input:  BlockSize - block size to set in function
+
+  @output: none
+
+  @return: SDIO Status
+
+  @notes:  Issues CMD52 to set the block size.  This function is fully synchronous and may
+           block.
+
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+SDIO_STATUS _SDLIB_SetFunctionBlockSize(PSDDEVICE        pDevice,
+                                        UINT16           BlockSize)
+{
+    UINT8   data[2];
+
+      /* endian safe */
+    data[0] = (UINT8)BlockSize;
+    data[1] = (UINT8)(BlockSize >> 8);
+        /* write the function blk size control register */
+    return _SDLIB_IssueCMD52(pDevice,
+                             0,    /* function 0 register space */
+                             FBR_FUNC_BLK_SIZE_LOW_OFFSET(CalculateFBROffset(
+                             SDDEVICE_GET_SDIO_FUNCNO(pDevice))),
+                             data,
+                             2,
+                             TRUE);
+}
+
+/**++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  @function: Print a buffer to the debug output
+
+  @function name: SDLIB_PrintBuffer
+  @prototype: void SDLIB_PrintBuffer(PUCHAR pBuffer, INT Length, PTEXT pDescription)
+  @category: Support_Reference
+
+  @input:  pBuffer - Hex buffer to be printed.
+  @input:  Length - length of pBuffer.
+  @input:  pDescription - String title to be printed above the dump.
+
+  @output: none
+
+  @return: none
+
+  @notes:  Prints the buffer by converting to ASCII and using REL_PRINT() with 16
+           bytes per line.
+
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+void _SDLIB_PrintBuffer(PUCHAR pBuffer, INT Length, PTEXT pDescription)
+{
+    TEXT  line[49];
+    TEXT  address[5];
+    TEXT  ascii[17];
+    TEXT  temp[5];
+    INT   i;
+    UCHAR num;
+    USHORT offset = 0;
+
+    REL_PRINT(0,
+              ("+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n"));
+    if (pDescription != NULL) {
+        REL_PRINT(0, ("Description: %s \n\n",pDescription));
+    } else {
+        REL_PRINT(0, ("Description: NONE \n\n"));
+    }
+    REL_PRINT(0,
+              ("Offset                   Data                               ASCII        \n"));
+    REL_PRINT(0,
+              ("--------------------------------------------------------------------------\n"));
+
+    while (Length) {
+        line[0] = (TEXT)0;
+        ascii[0] = (TEXT)0;
+        address[0] = (TEXT)0;
+        sprintf(address,"%4.4X",offset);
+        for (i = 0; i < 16; i++) {
+            if (Length != 0) {
+                num = *pBuffer;
+                sprintf(temp,"%2.2X ",num);
+                strcat(line,temp);
+                if ((num >= 0x20) && (num <= 0x7E)) {
+                    sprintf(temp,"%c",*pBuffer);
+                } else {
+                    sprintf(temp,"%c",0x2e);
+                }
+                strcat(ascii,temp);
+                pBuffer++;
+                Length--;
+            } else {
+                    /* pad partial line with spaces */
+                strcat(line,"   ");
+                strcat(ascii," ");
+            }
+        }
+        REL_PRINT(0,("%s    %s   %s\n", address, line, ascii));
+        offset += 16;
+    }
+    REL_PRINT(0,
+              ("+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n"));
+
+}
+
+/**++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  @function: Get default operational current
+
+  @function name: SDLIB_GetDefaultOpCurrent
+  @prototype: SDIO_STATUS SDLIB_GetDefaultOpCurrent(PSDDEVICE  pDevice, SD_SLOT_CURRENT *pOpCurrent)
+  @category: PD_Reference
+
+  @input: pDevice - the device that is the target of the command.
+
+  @output: pOpCurrent - operational current in mA.
+
+  @return: SDIO_STATUS
+
+  @notes:  This routine reads the function's CISTPL_FUNCE tuple for the default operational
+           current. For SDIO 1.0 devices this value is read from the 8-bit TPLFE_OP_MAX_PWR
+           field.  For SDIO 1.1 devices, the HP MAX power field is used only if the device is
+           operating in HIPWR mode. Otherwise the 8-bit TPLFE_OP_MAX_PWR field is used.
+           Some systems may restrict high power/current mode and force cards to operate in a
+           legacy (< 200mA) mode.  This function is fully synchronous and will block the caller.
+
+   @example: Getting the default operational current for this function:
+            // get default operational current
+       status = SDLIB_GetDefaultOpCurrent(pDevice, &slotCurrent);
+       if (!SDIO_SUCCESS(status)) {
+           .. failed
+       }
+
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+SDIO_STATUS _SDLIB_GetDefaultOpCurrent(PSDDEVICE  pDevice, SD_SLOT_CURRENT *pOpCurrent)
+{
+    UINT32              nextTpl;
+    UINT8               tplLength;
+    struct SDIO_FUNC_EXT_FUNCTION_TPL_1_1 funcTuple;
+    SDIO_STATUS         status;
+
+      /* get the FUNCE tuple */
+    nextTpl = SDDEVICE_GET_SDIO_FUNC_CISPTR(pDevice);
+    tplLength = sizeof(funcTuple);
+        /* go get the function Extension tuple */
+    status = _SDLIB_FindTuple(pDevice,
+                              CISTPL_FUNCE,
+                              &nextTpl,
+                              (PUINT8)&funcTuple,
+                              &tplLength);
+
+    if (!SDIO_SUCCESS(status)) {
+        DBG_PRINT(SDDBG_ERROR, ("SDLIB_GetDefaultOpCurrent: Failed to get FuncE Tuple: %d \n", status));
+        return status;
+    }
+       /* use the operational power (8-bit) value of current in mA as default*/
+    *pOpCurrent = funcTuple.CommonInfo.OpMaxPwr;
+    if ((tplLength >= sizeof(funcTuple)) && (SDDEVICE_IS_SDIO_REV_GTEQ_1_10(pDevice))) {
+            /* we have a 1.1 tuple */
+             /* check for HIPWR mode */
+        if (SDDEVICE_GET_CARD_FLAGS(pDevice) & CARD_HIPWR) {
+                /* use the maximum operational power (16 bit ) from the tuple */
+            *pOpCurrent = CT_LE16_TO_CPU_ENDIAN(funcTuple.HiPwrMaxPwr);
+        }
+    }
+    return SDIO_STATUS_SUCCESS;
+}
+
+
+static INLINE void FreeMessageBlock(PSDMESSAGE_QUEUE pQueue, PSDMESSAGE_BLOCK pMsg) {
+    SDListInsertHead(&pQueue->FreeMessageList, &pMsg->SDList);
+}
+static INLINE void QueueMessageBlock(PSDMESSAGE_QUEUE pQueue, PSDMESSAGE_BLOCK pMsg) {
+    SDListInsertTail(&pQueue->MessageList, &pMsg->SDList);
+}
+static INLINE void QueueMessageToHead(PSDMESSAGE_QUEUE pQueue, PSDMESSAGE_BLOCK pMsg) {
+    SDListInsertHead(&pQueue->MessageList, &pMsg->SDList);
+}
+
+static INLINE PSDMESSAGE_BLOCK GetFreeMessageBlock(PSDMESSAGE_QUEUE pQueue) {
+    PSDLIST pItem = SDListRemoveItemFromHead(&pQueue->FreeMessageList);
+    if (pItem != NULL) {
+        return CONTAINING_STRUCT(pItem, SDMESSAGE_BLOCK , SDList);
+    }
+    return NULL;
+}
+static INLINE PSDMESSAGE_BLOCK GetQueuedMessage(PSDMESSAGE_QUEUE pQueue) {
+    PSDLIST pItem = SDListRemoveItemFromHead(&pQueue->MessageList);
+    if (pItem != NULL) {
+        return CONTAINING_STRUCT(pItem, SDMESSAGE_BLOCK , SDList);
+    }
+    return NULL;
+}
+
+/**++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  @function: Create a message queue
+
+  @function name: SDLIB_CreateMessageQueue
+  @prototype: PSDMESSAGE_QUEUE SDLIB_CreateMessageQueue(INT MaxMessages, INT MaxMessageLength)
+  @category: Support_Reference
+
+  @input: MaxMessages - Maximum number of messages this queue supports
+  @input: MaxMessageLength - Maximum size of each message
+
+  @return: Message queue object, NULL on failure
+
+  @notes:  This function creates a simple first-in-first-out message queue.  The caller must determine
+           the maximum number of messages the queue supports and the size of each message.  This
+           function will pre-allocate memory for each message. A producer of data posts a message
+           using SDLIB_PostMessage with a user defined data structure. A consumer of this data
+           can retrieve the message (in FIFO order) using SDLIB_GetMessage. A message queue does not
+           provide a signaling mechanism for notifying a consumer of data. Notifying a consumer is
+           user defined.
+
+  @see also: SDLIB_DeleteMessageQueue, SDLIB_GetMessage, SDLIB_PostMessage.
+
+  @example: Creating a message queue:
+       typedef struct _MyMessage {
+           UINT8 Code;
+           PVOID pDataBuffer;
+       } MyMessage;
+            // create message queue, 16 messages max.
+       pMsgQueue = SDLIB_CreateMessageQueue(16,sizeof(MyMessage));
+       if (NULL == pMsgQueue) {
+           .. failed
+       }
+
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+PSDMESSAGE_QUEUE _CreateMessageQueue(INT MaxMessages, INT MaxMessageLength)
+{
+    PSDMESSAGE_QUEUE pQueue = NULL;
+    SDIO_STATUS      status = SDIO_STATUS_SUCCESS;
+    INT              ii;
+    PSDMESSAGE_BLOCK pMsg;
+
+    do {
+        pQueue = (PSDMESSAGE_QUEUE)KernelAlloc(sizeof(SDMESSAGE_QUEUE));
+
+        if (NULL == pQueue) {
+            status = SDIO_STATUS_NO_RESOURCES;
+            break;
+        }
+        SDLIST_INIT(&pQueue->MessageList);
+        SDLIST_INIT(&pQueue->FreeMessageList);
+        pQueue->MaxMessageLength = MaxMessageLength;
+        status = CriticalSectionInit(&pQueue->MessageCritSection);
+        if (!SDIO_SUCCESS(status)) {
+            break;
+        }
+            /* allocate message blocks */
+        for (ii = 0; ii < MaxMessages; ii++) {
+            pMsg = (PSDMESSAGE_BLOCK)KernelAlloc(sizeof(SDMESSAGE_BLOCK) + MaxMessageLength -1);
+            if (NULL == pMsg) {
+                break;
+            }
+            FreeMessageBlock(pQueue, pMsg);
+        }
+
+        if (0 == ii) {
+            status = SDIO_STATUS_NO_RESOURCES;
+            break;
+        }
+
+    } while (FALSE);
+
+    if (!SDIO_SUCCESS(status)) {
+        if (pQueue != NULL) {
+            _DeleteMessageQueue(pQueue);
+            pQueue = NULL;
+        }
+    }
+    return pQueue;
+}
+
+/**++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  @function: Delete a message queue
+
+  @function name: SDLIB_DeleteMessageQueue
+  @prototype: void SDLIB_DeleteMessageQueue(PSDMESSAGE_QUEUE pQueue)
+  @category: Support_Reference
+
+  @input: pQueue - message queue to delete
+
+  @notes: This function flushes the message queue and frees all memory allocated for
+          messages.
+
+  @see also: SDLIB_CreateMessageQueue
+
+  @example: Deleting a message queue:
+       if (pMsgQueue != NULL) {
+            SDLIB_DeleteMessageQueue(pMsgQueue);
+       }
+
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+void _DeleteMessageQueue(PSDMESSAGE_QUEUE pQueue)
+{
+    PSDMESSAGE_BLOCK pMsg;
+    SDIO_STATUS     status;
+    CT_DECLARE_IRQ_SYNC_CONTEXT();
+
+    status = CriticalSectionAcquireSyncIrq(&pQueue->MessageCritSection);
+
+        /* cleanup free list */
+    while (1) {
+        pMsg = GetFreeMessageBlock(pQueue);
+        if (pMsg != NULL) {
+            KernelFree(pMsg);
+        } else {
+            break;
+        }
+    }
+        /* cleanup any in the queue */
+    while (1) {
+        pMsg = GetQueuedMessage(pQueue);
+        if (pMsg != NULL) {
+            KernelFree(pMsg);
+        } else {
+            break;
+        }
+    }
+
+    status = CriticalSectionReleaseSyncIrq(&pQueue->MessageCritSection);
+    CriticalSectionDelete(&pQueue->MessageCritSection);
+    KernelFree(pQueue);
+
+}
+
+/**++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  @function: Post a message queue
+
+  @function name: SDLIB_PostMessage
+  @prototype: SDIO_STATUS SDLIB_PostMessage(PSDMESSAGE_QUEUE pQueue, PVOID pMessage, INT MessageLength)
+  @category: Support_Reference
+
+  @input: pQueue - message queue to post to
+  @input: pMessage - message to post
+  @input: MessageLength - length of message (for validation)
+
+  @return: SDIO_STATUS
+
+  @notes: The message queue uses an internal list of user defined message structures.  When
+          posting a message the message is copied into an allocated structure and queued.  The memory
+          pointed to by pMessage does not need to be allocated and can reside on the stack.
+          The length of the message to post can be smaller that the maximum message size. This allows
+          for variable length messages up to the maximum message size. This
+          function returns SDIO_STATUS_NO_RESOURCES, if the message queue is full.  This
+          function returns SDIO_STATUS_BUFFER_TOO_SMALL, if the message size exceeds the maximum
+          size of a message.  Posting and getting messsages from a message queue is safe in any
+          driver context.
+
+  @see also: SDLIB_CreateMessageQueue , SDLIB_GetMessage
+
+  @example: Posting a message
+       MyMessage message;
+           // set up message
+       message.code = MESSAGE_DATA_READY;
+       message.pData = pInstance->pDataBuffers[currentIndex];
+           // post message
+       status = SDLIB_PostMessage(pInstance->pReadQueue,&message,sizeof(message));
+       if (!SDIO_SUCCESS(status)) {
+           // failed
+       }
+
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+SDIO_STATUS _PostMessage(PSDMESSAGE_QUEUE pQueue, PVOID pMessage, INT MessageLength)
+{
+    SDIO_STATUS status2;
+    SDIO_STATUS status = SDIO_STATUS_SUCCESS;
+    PSDMESSAGE_BLOCK pMsg;
+    CT_DECLARE_IRQ_SYNC_CONTEXT();
+
+    if (MessageLength > pQueue->MaxMessageLength) {
+        return SDIO_STATUS_BUFFER_TOO_SMALL;
+    }
+
+    status = CriticalSectionAcquireSyncIrq(&pQueue->MessageCritSection);
+    if (!SDIO_SUCCESS(status)) {
+        return status;
+    }
+
+    do {
+            /* get a message block */
+        pMsg = GetFreeMessageBlock(pQueue);
+        if (NULL == pMsg) {
+            status = SDIO_STATUS_NO_RESOURCES;
+            break;
+        }
+            /* copy the message */
+        memcpy(pMsg->MessageStart,pMessage,MessageLength);
+            /* set the length of the message */
+        pMsg->MessageLength = MessageLength;
+            /* queue the message to the list  */
+        QueueMessageBlock(pQueue,pMsg);
+    } while (FALSE);
+
+    status2 = CriticalSectionReleaseSyncIrq(&pQueue->MessageCritSection);
+    return status;
+}
+
+/**++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  @function: Get a message from a message queue
+
+  @function name: SDLIB_GetMessage
+  @prototype: SDIO_STATUS SDLIB_GetMessage(PSDMESSAGE_QUEUE pQueue, PVOID pData, INT *pBufferLength)
+  @category: Support_Reference
+
+  @input: pQueue - message queue to retreive a message from
+  @input: pBufferLength - on entry, the length of the data buffer
+  @output: pData - buffer to hold the message
+  @output: pBufferLength - on return, contains the number of bytes copied
+
+  @return: SDIO_STATUS
+
+  @notes: The message queue uses an internal list of user defined message structures.  The message is
+          dequeued (FIFO order) and copied to the callers buffer.  The internal allocation for the message
+          is returned back to the message queue. This function returns SDIO_STATUS_NO_MORE_MESSAGES
+          if the message queue is empty. If the length of the buffer is smaller than the length of
+          the message at the head of the queue,this function returns SDIO_STATUS_BUFFER_TOO_SMALL and
+          returns the required length in pBufferLength.
+
+  @see also: SDLIB_CreateMessageQueue , SDLIB_PostMessage
+
+  @example: Getting a message
+       MyMessage message;
+       INT       length;
+           // set length
+       length = sizeof(message);
+           // post message
+       status = SDLIB_GetMessage(pInstance->pReadQueue,&message,&length);
+       if (!SDIO_SUCCESS(status)) {
+           // failed
+       }
+
+  @example: Checking queue for a message and getting the size of the message
+       INT       length;
+           // use zero length to get the size of the message
+       length = 0;
+       status = SDLIB_GetMessage(pInstance->pReadQueue,NULL,&length);
+       if (status == SDIO_STATUS_NO_MORE_MESSAGES) {
+            // no messages in queue
+       } else if (status == SDIO_STATUS_BUFFER_TOO_SMALL) {
+            // message exists in queue and length of message is returned
+            messageSizeInQueue = length;
+       } else {
+            // some other failure
+       }
+
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+SDIO_STATUS _GetMessage(PSDMESSAGE_QUEUE pQueue, PVOID pData, INT *pBufferLength)
+{
+    SDIO_STATUS status2;
+    SDIO_STATUS status = SDIO_STATUS_SUCCESS;
+    PSDMESSAGE_BLOCK pMsg;
+    CT_DECLARE_IRQ_SYNC_CONTEXT();
+
+    status = CriticalSectionAcquireSyncIrq(&pQueue->MessageCritSection);
+    if (!SDIO_SUCCESS(status)) {
+        return status;
+    }
+
+    do {
+        pMsg = GetQueuedMessage(pQueue);
+        if (NULL == pMsg) {
+            status = SDIO_STATUS_NO_MORE_MESSAGES;
+            break;
+        }
+        if (*pBufferLength < pMsg->MessageLength) {
+                /* caller buffer is too small */
+            *pBufferLength = pMsg->MessageLength;
+                /* stick it back to the front */
+            QueueMessageToHead(pQueue, pMsg);
+            status = SDIO_STATUS_BUFFER_TOO_SMALL;
+            break;
+        }
+            /* copy the message to the callers buffer */
+        memcpy(pData,pMsg->MessageStart,pMsg->MessageLength);
+            /* return actual length */
+        *pBufferLength = pMsg->MessageLength;
+            /* return this message block back to the free list  */
+        FreeMessageBlock(pQueue, pMsg);
+
+    } while (FALSE);
+
+    status2 = CriticalSectionReleaseSyncIrq(&pQueue->MessageCritSection);
+
+    return status;
+}
+
+/* the following documents the OS helper APIs */
+
+/**++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  @function: Create an OS-specific helper task/thread
+
+  @function name: SDLIB_OSCreateHelper
+  @prototype: SDIO_STATUS SDLIB_OSCreateHelper(POSKERNEL_HELPER pHelper,
+                                               PHELPER_FUNCTION pFunction,
+                                               PVOID            pContext)
+  @category: Support_Reference
+
+  @input: pHelper - caller allocated helper object
+  @input: pFunction - helper function
+  @input: pContext - helper context
+
+  @return: SDIO_STATUS
+
+  @notes: This function creates a helper task/thread that runs in a new execution context. The newly
+          created task/thread invokes the helper function. The thread/task exits when the helper
+          function returns.  The helper function has the prototype of:
+          THREAD_RETURN HelperFunction(POSKERNEL_HELPER pHelper)
+          The helper function usually implements a while loop and suspends execution using
+          SD_WAIT_FOR_WAKEUP().  On exit the helper function can return an OS-specific THREAD_RETURN
+          code (usually zero). The helper function executes in a fully schedule-able context and
+          can block on semaphores and sleep.
+
+  @see also: SDLIB_OSDeleteHelper , SD_WAIT_FOR_WAKEUP
+
+  @example: A thread helper function:
+       THREAD_RETURN HelperFunction(POSKERNEL_HELPER pHelper)
+       {
+           SDIO_STATUS status;
+           PMYCONTEXT pContext = (PMYCONTEXT)SD_GET_OS_HELPER_CONTEXT(pHelper);
+                // wait for wake up
+           while(1) {
+                  status = SD_WAIT_FOR_WAKEUP(pHelper);
+                  if (!SDIO_SUCCESS(status)) {
+                      break;
+                  }
+                  if (SD_IS_HELPER_SHUTTING_DOWN(pHelper)) {
+                      //... shutting down
+                      break;
+                  }
+                  // handle wakeup...
+            }
+            return 0;
+       }
+
+  @example: Creating a helper:
+       status = SDLIB_OSCreateHelper(&pInstance->OSHelper,HelperFunction,pInstance);
+       if (!SDIO_SUCCESS(status)) {
+           // failed
+       }
+
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+
+/**++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  @function: Delete an OS helper task/thread
+
+  @function name: SDLIB_OSDeleteHelper
+  @prototype: void SDLIB_OSDeleteHelper(POSKERNEL_HELPER pHelper)
+  @category: Support_Reference
+
+  @input: pHelper - caller allocated helper object
+
+  @notes: This function wakes the helper and waits(blocks) until the helper exits. The caller can
+          only pass an OS helper structure that was initialized sucessfully by
+          SDLIB_OSCreateHelper.  The caller must be in a schedulable context.
+
+  @see also: SDLIB_OSCreateHelper
+
+  @example: Deleting a helper:
+       if (pInstance->HelperCreated) {
+               // clean up the helper if we successfully created it
+           SDLIB_OSDeleteHelper(&pInstance->OSHelper);
+       }
+
+
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+
+
diff --git a/drivers/sdio/stack/lib/sdio_lib_os.c b/drivers/sdio/stack/lib/sdio_lib_os.c
new file mode 100644
index 00000000000..55363d04ffd
--- /dev/null
+++ b/drivers/sdio/stack/lib/sdio_lib_os.c
@@ -0,0 +1,251 @@
+/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+@file: sdio_function_os.c
+
+@abstract: Linux implementation module for SDIO library
+
+#notes: includes module load and unload functions
+
+@notice: Copyright (c), 2004 Atheros Communications, Inc.
+
+
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 as
+ *  published by the Free Software Foundation;
+ *
+ *  Software distributed under the License is distributed on an "AS
+ *  IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+ *  implied. See the License for the specific language governing
+ *  rights and limitations under the License.
+ *
+ *  Portions of this code were developed with information supplied from the
+ *  SD Card Association Simplified Specifications. The following conditions and disclaimers may apply:
+ *
+ *   The following conditions apply to the release of the SD simplified specification (�Simplified
+ *   Specification�) by the SD Card Association. The Simplified Specification is a subset of the complete
+ *   SD Specification which is owned by the SD Card Association. This Simplified Specification is provided
+ *   on a non-confidential basis subject to the disclaimers below. Any implementation of the Simplified
+ *   Specification may require a license from the SD Card Association or other third parties.
+ *   Disclaimers:
+ *   The information contained in the Simplified Specification is presented only as a standard
+ *   specification for SD Cards and SD Host/Ancillary products and is provided "AS-IS" without any
+ *   representations or warranties of any kind. No responsibility is assumed by the SD Card Association for
+ *   any damages, any infringements of patents or other right of the SD Card Association or any third
+ *   parties, which may result from its use. No license is granted by implication, estoppel or otherwise
+ *   under any patent or other rights of the SD Card Association or any third party. Nothing herein shall
+ *   be construed as an obligation by the SD Card Association to disclose or distribute any technical
+ *   information, know-how or other confidential information to any third party.
+ *
+ *
+ *  The initial developers of the original code are Seung Yi and Paul Lever
+ *
+ *  sdio@atheros.com
+ *
+ *
+
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+/* debug level for this module*/
+#define DBG_DECLARE 4;
+#include <linux/sdio/ctsystem.h>
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/kthread.h>
+
+#include <linux/sdio/sdio_busdriver.h>
+#include <linux/sdio/sdio_lib.h>
+#include "_sdio_lib.h"
+
+#define DESCRIPTION "SDIO Kernel Library"
+#define AUTHOR "Atheros Communications, Inc."
+
+/* proxies */
+SDIO_STATUS SDLIB_IssueCMD52(PSDDEVICE     pDevice,
+                            UINT8         FuncNo,
+                            UINT32        Address,
+                            PUINT8        pData,
+                            INT           ByteCount,
+                            BOOL          Write)
+{
+    return _SDLIB_IssueCMD52(pDevice,FuncNo,Address,pData,ByteCount,Write);
+}
+
+SDIO_STATUS SDLIB_FindTuple(PSDDEVICE  pDevice,
+                         UINT8      Tuple,
+                         UINT32     *pTupleScanAddress,
+                         PUINT8     pBuffer,
+                         UINT8      *pLength)
+{
+    return _SDLIB_FindTuple(pDevice,Tuple,pTupleScanAddress,pBuffer,pLength);
+}
+
+SDIO_STATUS SDLIB_IssueConfig(PSDDEVICE        pDevice,
+                              SDCONFIG_COMMAND Command,
+                              PVOID            pData,
+                              INT              Length)
+{
+    return _SDLIB_IssueConfig(pDevice,Command,pData,Length);
+}
+
+void SDLIB_PrintBuffer(PUCHAR pBuffer,INT Length,PTEXT pDescription)
+{
+    _SDLIB_PrintBuffer(pBuffer,Length,pDescription);
+}
+
+SDIO_STATUS SDLIB_SetFunctionBlockSize(PSDDEVICE        pDevice,
+                                       UINT16           BlockSize)
+{
+    return _SDLIB_SetFunctionBlockSize(pDevice,BlockSize);
+}
+
+void SDLIB_SetupCMD52Request(UINT8         FuncNo,
+                             UINT32        Address,
+                             BOOL          Write,
+                             UINT8         WriteData,
+                             PSDREQUEST    pRequest)
+{
+    _SDLIB_SetupCMD52Request(FuncNo,Address,Write,WriteData,pRequest);
+}
+
+SDIO_STATUS SDLIB_GetDefaultOpCurrent(PSDDEVICE  pDevice, SD_SLOT_CURRENT *pOpCurrent)
+{
+    return _SDLIB_GetDefaultOpCurrent(pDevice,pOpCurrent);
+}
+
+/* helper function launcher */
+INT HelperLaunch(PVOID pContext)
+{
+    INT exit;
+        /* call function */
+    exit = ((POSKERNEL_HELPER)pContext)->pHelperFunc((POSKERNEL_HELPER)pContext);
+    complete_and_exit(&((POSKERNEL_HELPER)pContext)->Completion, exit);
+    return exit;
+}
+
+/*
+ * OSCreateHelper - create a worker kernel thread
+*/
+SDIO_STATUS SDLIB_OSCreateHelper(POSKERNEL_HELPER pHelper,
+                           PHELPER_FUNCTION pFunction,
+                           PVOID            pContext)
+{
+    SDIO_STATUS status = SDIO_STATUS_SUCCESS;
+
+    memset(pHelper,0,sizeof(OSKERNEL_HELPER));
+
+    do {
+        pHelper->pContext = pContext;
+        pHelper->pHelperFunc = pFunction;
+        status = SignalInitialize(&pHelper->WakeSignal);
+        if (!SDIO_SUCCESS(status)) {
+            break;
+        }
+        init_completion(&pHelper->Completion);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
+        pHelper->pTask = kthread_create(HelperLaunch,
+                                       (PVOID)pHelper,
+                                       "SDIO Helper");
+        if (NULL == pHelper->pTask) {
+            status = SDIO_STATUS_NO_RESOURCES;
+            break;
+        }
+        wake_up_process(pHelper->pTask);
+#else
+    /* 2.4 */
+        pHelper->pTask = kernel_thread(HelperLaunch,
+                                       (PVOID)pHelper,
+                                       (CLONE_FS | CLONE_FILES | SIGCHLD));
+        if (pHelper->pTask < 0) {
+            DBG_PRINT(SDDBG_TRACE,
+                ("SDIO BusDriver - OSCreateHelper, failed to create thread\n"));
+        }
+#endif
+
+    } while (FALSE);
+
+    if (!SDIO_SUCCESS(status)) {
+        SDLIB_OSDeleteHelper(pHelper);
+    }
+    return status;
+}
+
+/*
+ * OSDeleteHelper - delete thread created with OSCreateHelper
+*/
+void SDLIB_OSDeleteHelper(POSKERNEL_HELPER pHelper)
+{
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
+    if (pHelper->pTask != NULL) {
+#else
+    /* 2.4 */
+    if (pHelper->pTask >= 0) {
+#endif
+        pHelper->ShutDown = TRUE;
+        SignalSet(&pHelper->WakeSignal);
+            /* wait for thread to exit */
+        wait_for_completion(&pHelper->Completion);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
+        pHelper->pTask = NULL;
+#else
+    /* 2.4 */
+        pHelper->pTask = 0;
+#endif
+    }
+
+    SignalDelete(&pHelper->WakeSignal);
+}
+
+/*
+ * module init
+*/
+static int __init sdio_lib_init(void) {
+    REL_PRINT(SDDBG_TRACE, ("SDIO Library load\n"));
+    return 0;
+}
+
+/*
+ * module cleanup
+*/
+static void __exit sdio_lib_cleanup(void) {
+    REL_PRINT(SDDBG_TRACE, ("SDIO Library unload\n"));
+}
+
+PSDMESSAGE_QUEUE SDLIB_CreateMessageQueue(INT MaxMessages, INT MaxMessageLength)
+{
+    return _CreateMessageQueue(MaxMessages,MaxMessageLength);
+
+}
+void SDLIB_DeleteMessageQueue(PSDMESSAGE_QUEUE pQueue)
+{
+    _DeleteMessageQueue(pQueue);
+}
+
+SDIO_STATUS SDLIB_PostMessage(PSDMESSAGE_QUEUE pQueue, PVOID pMessage, INT MessageLength)
+{
+    return _PostMessage(pQueue,pMessage,MessageLength);
+}
+
+SDIO_STATUS SDLIB_GetMessage(PSDMESSAGE_QUEUE pQueue, PVOID pData, INT *pBufferLength)
+{
+    return _GetMessage(pQueue,pData,pBufferLength);
+}
+
+MODULE_LICENSE("GPL and additional rights");
+MODULE_DESCRIPTION(DESCRIPTION);
+MODULE_AUTHOR(AUTHOR);
+module_init(sdio_lib_init);
+module_exit(sdio_lib_cleanup);
+EXPORT_SYMBOL(SDLIB_IssueCMD52);
+EXPORT_SYMBOL(SDLIB_FindTuple);
+EXPORT_SYMBOL(SDLIB_IssueConfig);
+EXPORT_SYMBOL(SDLIB_PrintBuffer);
+EXPORT_SYMBOL(SDLIB_SetFunctionBlockSize);
+EXPORT_SYMBOL(SDLIB_SetupCMD52Request);
+EXPORT_SYMBOL(SDLIB_GetDefaultOpCurrent);
+EXPORT_SYMBOL(SDLIB_OSCreateHelper);
+EXPORT_SYMBOL(SDLIB_OSDeleteHelper);
+EXPORT_SYMBOL(SDLIB_CreateMessageQueue);
+EXPORT_SYMBOL(SDLIB_DeleteMessageQueue);
+EXPORT_SYMBOL(SDLIB_PostMessage);
+EXPORT_SYMBOL(SDLIB_GetMessage);
diff --git a/drivers/sdio/stack/platform/Makefile b/drivers/sdio/stack/platform/Makefile
new file mode 100644
index 00000000000..14b36126035
--- /dev/null
+++ b/drivers/sdio/stack/platform/Makefile
@@ -0,0 +1,2 @@
+obj-$(CONFIG_SDIO) += sdio_platform.o
+sdio_platform-objs := sdioplatformdriver.o
\ No newline at end of file
diff --git a/drivers/sdio/stack/platform/sdioplatformdriver.c b/drivers/sdio/stack/platform/sdioplatformdriver.c
new file mode 100644
index 00000000000..d5520fc2908
--- /dev/null
+++ b/drivers/sdio/stack/platform/sdioplatformdriver.c
@@ -0,0 +1,300 @@
+/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+@file: sdioplatformdriver.c
+
+@abstract: Linux implementation module for SDIO pltaform driver
+
+#notes:
+
+@notice: Copyright (c), 2006 Atheros Communications, Inc.
+
+@license:  This program is free software; you can redistribute it and/or modify
+           it under the terms of the GNU General Public License version 2 as
+           published by the Free Software Foundation.
+
+
+
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 as
+ *  published by the Free Software Foundation;
+ *
+ *  Software distributed under the License is distributed on an "AS
+ *  IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+ *  implied. See the License for the specific language governing
+ *  rights and limitations under the License.
+ *
+ *  Portions of this code were developed with information supplied from the
+ *  SD Card Association Simplified Specifications. The following conditions and disclaimers may apply:
+ *
+ *   The following conditions apply to the release of the SD simplified specification (�Simplified
+ *   Specification�) by the SD Card Association. The Simplified Specification is a subset of the complete
+ *   SD Specification which is owned by the SD Card Association. This Simplified Specification is provided
+ *   on a non-confidential basis subject to the disclaimers below. Any implementation of the Simplified
+ *   Specification may require a license from the SD Card Association or other third parties.
+ *   Disclaimers:
+ *   The information contained in the Simplified Specification is presented only as a standard
+ *   specification for SD Cards and SD Host/Ancillary products and is provided "AS-IS" without any
+ *   representations or warranties of any kind. No responsibility is assumed by the SD Card Association for
+ *   any damages, any infringements of patents or other right of the SD Card Association or any third
+ *   parties, which may result from its use. No license is granted by implication, estoppel or otherwise
+ *   under any patent or other rights of the SD Card Association or any third party. Nothing herein shall
+ *   be construed as an obligation by the SD Card Association to disclose or distribute any technical
+ *   information, know-how or other confidential information to any third party.
+ *
+ *
+ *  The initial developers of the original code are Seung Yi and Paul Lever
+ *
+ *  sdio@atheros.com
+ *
+ *
+
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+
+#define DESCRIPTION "SDIO Platform Driver"
+#define AUTHOR "Atheros Communications, Inc."
+
+//??for .h
+
+struct sdioplatform_peripheral {
+    struct list_head    node;
+    struct sdioplatform_controller *controller;
+    struct device       dev;
+};
+struct sdioplatform_driver {
+    struct device_driver drv;
+    int (*probe)(struct sdioplatform_peripheral *);
+    void (*remove)(struct sdioplatform_peripheral *);
+    int (*suspend)(struct sdioplatform_peripheral *, pm_message_t);
+    int (*resume)(struct sdioplatform_peripheral *);
+};
+
+
+struct sdioplatform_controller {
+    struct device       *dev;
+};
+struct sdioplatform_controller_driver {
+    struct device_driver drv;
+    int (*probe)(struct sdioplatform_controller *);
+    void (*remove)(struct sdioplatform_controller *);
+    int (*suspend)(struct sdioplatform_controller *, pm_message_t);
+    int (*resume)(struct sdioplatform_controller *);
+};
+
+
+
+#define device_to_sdioplatform_peripheral(d)  container_of(d, struct sdioplatform_peripheral, dev)
+#define driver_to_sdioplatform_driver(d)  container_of(d, struct sdioplatform_driver, drv)
+
+#define device_to_sdioplatform_controller(d)  container_of(d, struct sdioplatform_controller, dev)
+#define driver_to_sdioplatform_controller_driver(d)  container_of(d, struct sdioplatform_controller_driver, drv)
+
+#define SDIOPLATFORM_ATTR(name, fmt, args...)                    \
+static ssize_t sdio_##name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
+{                                   \
+    struct sdioplatform_peripheral *peripheral = device_to_sdioplatform_peripheral(dev);  \
+    return sprintf(buf, fmt, args);                 \
+}
+
+SDIOPLATFORM_ATTR(bus_id, "%s\n", bus_id);
+#define SDIOPLATFORM_ATTR_RO(name) __ATTR(name, S_IRUGO, sdioplatform_##name##_show, NULL)
+
+static struct device_attribute sdioplatform_dev_attrs[] = {
+    SDIOPLATFORM_ATTR_RO(bus_id),
+    __ATTR_NULL
+};
+
+static struct bus_type sdioplatform_bus_type = {
+    .name       = "sdioplatform",
+    .dev_attrs  = sdioplatform_dev_attrs,
+    .match      = sdioplatform_bus_match,
+    .hotplug    = NULL,
+    .suspend    = sdioplatform_bus_suspend,
+    .resume     = sdioplatform_bus_resume,
+};
+
+
+/* controller functions */
+static int sdioplatform_controllerdrv_probe(struct device *dev)
+{
+    struct sdioplatform_controller_driver *drv = driver_to_sdioplatform_controller_driver(dev->driver);
+    struct sdioplatform_controller *controller = device_to_sdioplatform_controller(dev);
+
+    return drv->probe(controller);
+}
+
+static int sdioplatform_controllerdrv_remove(struct device *dev)
+{
+    struct sdioplatform_controller_driver *drv = driver_to_sdioplatform_controller_driver(dev->driver);
+    struct sdioplatform_controller *controller = device_to_sdioplatform_controller(dev);
+
+    return drv->remove(controller);
+}
+
+/*
+ * sdioplatform_register_controller_driver - register a controller driver
+ */
+int sdioplatform_register_controller_driver(struct sdioplatform_controller_driver *drv)
+{
+    drv->drv.bus = &sdioplatform_bus_type;
+    drv->drv.probe = sdioplatform_controllerdrv_probe;
+    drv->drv.remove = sdioplatform_controllerdrv_remove;
+    return driver_register(&drv->drv);
+}
+
+/*
+ *  sdioplatform_unregister_controller_driver - unregister a controller driver
+ */
+void sdioplatform_unregister_controller_driver(struct sdioplatform_driver *drv)
+{
+    driver_unregister(&drv->drv);
+}
+
+/*
+ * sdioplatform_add_controller - register a controller device
+ */
+int sdioplatform_add_controller(char *name, struct sdioplatform_controller *dev)
+{
+    if (!dev) {
+        return -EINVAL;
+    }
+    strncpy(dev->dev.bus_id, BUS_ID_SIZE, name);
+    return device_register(&dev->dev);
+}
+
+/*
+ * sdioplatform_remove_controller - unregister a controller device
+ */
+int sdioplatform_remove_controller(char *name, struct sdioplatform_controller *dev)
+{
+    if (!dev) {
+        return -EINVAL;
+    }
+    return device_unregister(&dev->dev);
+}
+
+/* peripheral functions */
+static int sdioplatform_drv_probe(struct device *dev)
+{
+    struct sdioplatform_driver *drv = driver_to_sdioplatform_driver(dev->driver);
+    struct sdioplatform_peripheral *peripheral = device_to_sdioplatform_peripheral(dev);
+
+    return drv->probe(peripheral);
+}
+
+static int sdioplatform_controllerdrv_remove(struct device *dev)
+{
+    struct sdioplatform_controller_driver *drv = driver_to_sdioplatform_controller_driver(dev->driver);
+    struct sdioplatform_controller *controller = device_to_sdioplatform_controller(dev);
+
+    return drv->remove(controller);
+}
+
+/*
+ * sdioplatform_register_driver - register a driver
+ */
+int sdioplatform_register_driver(struct sdioplatform_driver *drv)
+{
+    drv->drv.bus = &sdioplatform_bus_type;
+    drv->drv.probe = sdioplatform_drv_probe;
+    drv->drv.remove = sdioplatform_drv_remove;
+    return driver_register(&drv->drv);
+}
+
+/*
+ *  sdioplatform_unregister_driver - unregister a driver
+ */
+void sdioplatform_unregister_driver(struct sdioplatform_driver *drv)
+{
+    driver_unregister(&drv->drv);
+}
+
+/*
+ * sdioplatform_add_peripheral - register a peripheral device
+ */
+int sdioplatform_add_peripheral(char *name, struct sdioplatform_peripheral *dev)
+{
+    if (!dev) {
+        return -EINVAL;
+    }
+    strncpy(dev->dev.bus_id, BUS_ID_SIZE, name);
+    return device_register(&dev->dev);
+}
+
+/*
+ * sdioplatform_remove_peripheral - unregister a peripheral device
+ */
+int sdioplatform_remove_peripheral(char *name, struct sdioplatform_peripheral *dev)
+{
+    if (!dev) {
+        return -EINVAL;
+    }
+    return device_unregister(&dev->dev);
+}
+
+
+
+
+
+static int sdioplatform_bus_match(struct device *dev, struct device_driver *drv)
+{
+    /* probes handle the matching */
+    return 1;
+}
+
+static int sdioplatform_bus_suspend(struct device *dev, pm_message_t state)
+{
+    struct sdioplatform_driver *drv = driver_to_sdioplatform_driver(dev->driver);
+    struct sdioplatform_peripheral *peripheral = device_to_sdioplatform_peripheral(dev);
+    int ret = 0;
+
+    if (peripheral->driver && drv->suspend) {
+        ret = drv->suspend(peripheral, state);
+    }
+    return ret;
+}
+
+static int sdioplatform_bus_resume(struct device *dev)
+{
+    struct sdioplatform_driver *drv = driver_to_sdioplatform_driver(dev->driver);
+    struct sdioplatform_peripheral *peripheral = device_to_sdioplatform_peripheral(dev);
+    int ret = 0;
+
+    if (peripheral->driver && drv->resume) {
+        ret = drv->resume(card);
+    }
+    return ret;
+}
+
+/*
+ * module init
+*/
+static int __init sdio_platformdriver_init(void) {
+    int ret = bus_register(&sdioplatform_bus_type);
+    return ret;
+}
+
+/*
+ * module cleanup
+*/
+static void __exit sdio_platformdriver_cleanup(void) {
+    REL_PRINT(SDDBG_TRACE, ("SDIO unloaded\n"));
+    _SDIO_BusDriverCleanup();
+}
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION(DESCRIPTION);
+MODULE_AUTHOR(AUTHOR);
+
+module_init(sdio_platformdriver_init);
+module_exit(sdio_platformdriver_cleanup);
+EXPORT_SYMBOL(sdioplatform_register_controller_driver);
+EXPORT_SYMBOL(sdioplatform_unregister_controller_driver);
+EXPORT_SYMBOL(sdioplatform_add_controller);
+EXPORT_SYMBOL(sdioplatform_remove_controller);
+EXPORT_SYMBOL(sdioplatform_register_driver);
+EXPORT_SYMBOL(sdioplatform_unregister_driver);
+EXPORT_SYMBOL(sdioplatform_add_peripheral);
+EXPORT_SYMBOL(sdioplatform_remove_peripheral);
+
+
+