diff options
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/Kconfig | 106 | ||||
| -rw-r--r-- | drivers/mmc/Makefile | 33 | ||||
| -rw-r--r-- | drivers/mmc/card/Kconfig | 17 | ||||
| -rw-r--r-- | drivers/mmc/card/Makefile | 11 | ||||
| -rw-r--r-- | drivers/mmc/card/block.c (renamed from drivers/mmc/mmc_block.c) | 55 | ||||
| -rw-r--r-- | drivers/mmc/card/queue.c (renamed from drivers/mmc/mmc_queue.c) | 12 | ||||
| -rw-r--r-- | drivers/mmc/card/queue.h (renamed from drivers/mmc/mmc_queue.h) | 0 | ||||
| -rw-r--r-- | drivers/mmc/core/Kconfig | 17 | ||||
| -rw-r--r-- | drivers/mmc/core/Makefile | 11 | ||||
| -rw-r--r-- | drivers/mmc/core/core.c | 727 | ||||
| -rw-r--r-- | drivers/mmc/core/core.h | 70 | ||||
| -rw-r--r-- | drivers/mmc/core/mmc.c | 537 | ||||
| -rw-r--r-- | drivers/mmc/core/mmc_ops.c | 276 | ||||
| -rw-r--r-- | drivers/mmc/core/mmc_ops.h | 27 | ||||
| -rw-r--r-- | drivers/mmc/core/sd.c | 587 | ||||
| -rw-r--r-- | drivers/mmc/core/sd_ops.c | 316 | ||||
| -rw-r--r-- | drivers/mmc/core/sd_ops.h | 25 | ||||
| -rw-r--r-- | drivers/mmc/core/sysfs.c (renamed from drivers/mmc/mmc_sysfs.c) | 11 | ||||
| -rw-r--r-- | drivers/mmc/core/sysfs.h (renamed from drivers/mmc/mmc.h) | 10 | ||||
| -rw-r--r-- | drivers/mmc/host/Kconfig | 103 | ||||
| -rw-r--r-- | drivers/mmc/host/Makefile | 18 | ||||
| -rw-r--r-- | drivers/mmc/host/at91_mci.c (renamed from drivers/mmc/at91_mci.c) | 1 | ||||
| -rw-r--r-- | drivers/mmc/host/au1xmmc.c (renamed from drivers/mmc/au1xmmc.c) | 1 | ||||
| -rw-r--r-- | drivers/mmc/host/au1xmmc.h (renamed from drivers/mmc/au1xmmc.h) | 0 | ||||
| -rw-r--r-- | drivers/mmc/host/imxmmc.c (renamed from drivers/mmc/imxmmc.c) | 1 | ||||
| -rw-r--r-- | drivers/mmc/host/imxmmc.h (renamed from drivers/mmc/imxmmc.h) | 0 | ||||
| -rw-r--r-- | drivers/mmc/host/mmci.c (renamed from drivers/mmc/mmci.c) | 1 | ||||
| -rw-r--r-- | drivers/mmc/host/mmci.h (renamed from drivers/mmc/mmci.h) | 0 | ||||
| -rw-r--r-- | drivers/mmc/host/omap.c (renamed from drivers/mmc/omap.c) | 56 | ||||
| -rw-r--r-- | drivers/mmc/host/pxamci.c (renamed from drivers/mmc/pxamci.c) | 1 | ||||
| -rw-r--r-- | drivers/mmc/host/pxamci.h (renamed from drivers/mmc/pxamci.h) | 0 | ||||
| -rw-r--r-- | drivers/mmc/host/sdhci.c (renamed from drivers/mmc/sdhci.c) | 43 | ||||
| -rw-r--r-- | drivers/mmc/host/sdhci.h (renamed from drivers/mmc/sdhci.h) | 4 | ||||
| -rw-r--r-- | drivers/mmc/host/tifm_sd.c | 1102 | ||||
| -rw-r--r-- | drivers/mmc/host/wbsd.c (renamed from drivers/mmc/wbsd.c) | 205 | ||||
| -rw-r--r-- | drivers/mmc/host/wbsd.h (renamed from drivers/mmc/wbsd.h) | 9 | ||||
| -rw-r--r-- | drivers/mmc/mmc.c | 1724 | ||||
| -rw-r--r-- | drivers/mmc/tifm_sd.c | 987 |
38 files changed, 4006 insertions, 3098 deletions
diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig index 12af9c71876..6c97491543d 100644 --- a/drivers/mmc/Kconfig +++ b/drivers/mmc/Kconfig @@ -19,110 +19,10 @@ config MMC_DEBUG This is an option for use by developers; most people should say N here. This enables MMC core and driver debugging. -config MMC_BLOCK - tristate "MMC block device driver" - depends on MMC && BLOCK - default y - help - Say Y here to enable the MMC block device driver support. - This provides a block device driver, which you can use to - mount the filesystem. Almost everyone wishing MMC support - should say Y or M here. - -config MMC_ARMMMCI - tristate "ARM AMBA Multimedia Card Interface support" - depends on ARM_AMBA && MMC - help - This selects the ARM(R) AMBA(R) PrimeCell Multimedia Card - Interface (PL180 and PL181) support. If you have an ARM(R) - platform with a Multimedia Card slot, say Y or M here. - - If unsure, say N. - -config MMC_PXA - tristate "Intel PXA25x/26x/27x Multimedia Card Interface support" - depends on ARCH_PXA && MMC - help - This selects the Intel(R) PXA(R) Multimedia card Interface. - If you have a PXA(R) platform with a Multimedia Card slot, - say Y or M here. - - If unsure, say N. - -config MMC_SDHCI - tristate "Secure Digital Host Controller Interface support (EXPERIMENTAL)" - depends on PCI && MMC && EXPERIMENTAL - help - This select the generic Secure Digital Host Controller Interface. - It is used by manufacturers such as Texas Instruments(R), Ricoh(R) - and Toshiba(R). Most controllers found in laptops are of this type. - If you have a controller with this interface, say Y or M here. - - If unsure, say N. - -config MMC_OMAP - tristate "TI OMAP Multimedia Card Interface support" - depends on ARCH_OMAP && MMC - select TPS65010 if MACH_OMAP_H2 - help - This selects the TI OMAP Multimedia card Interface. - If you have an OMAP board with a Multimedia Card slot, - say Y or M here. - - If unsure, say N. +source "drivers/mmc/core/Kconfig" -config MMC_WBSD - tristate "Winbond W83L51xD SD/MMC Card Interface support" - depends on MMC && ISA_DMA_API - help - This selects the Winbond(R) W83L51xD Secure digital and - Multimedia card Interface. - If you have a machine with a integrated W83L518D or W83L519D - SD/MMC card reader, say Y or M here. - - If unsure, say N. - -config MMC_AU1X - tristate "Alchemy AU1XX0 MMC Card Interface support" - depends on MMC && SOC_AU1200 - help - This selects the AMD Alchemy(R) Multimedia card interface. - If you have a Alchemy platform with a MMC slot, say Y or M here. - - If unsure, say N. - -config MMC_AT91 - tristate "AT91 SD/MMC Card Interface support" - depends on ARCH_AT91 && MMC - help - This selects the AT91 MCI controller. - - If unsure, say N. - -config MMC_IMX - tristate "Motorola i.MX Multimedia Card Interface support" - depends on ARCH_IMX && MMC - help - This selects the Motorola i.MX Multimedia card Interface. - If you have a i.MX platform with a Multimedia Card slot, - say Y or M here. - - If unsure, say N. - -config MMC_TIFM_SD - tristate "TI Flash Media MMC/SD Interface support (EXPERIMENTAL)" - depends on MMC && EXPERIMENTAL && PCI - select TIFM_CORE - help - Say Y here if you want to be able to access MMC/SD cards with - the Texas Instruments(R) Flash Media card reader, found in many - laptops. - This option 'selects' (turns on, enables) 'TIFM_CORE', but you - probably also need appropriate card reader host adapter, such as - 'Misc devices: TI Flash Media PCI74xx/PCI76xx host adapter support - (TIFM_7XX1)'. +source "drivers/mmc/card/Kconfig" - To compile this driver as a module, choose M here: the - module will be called tifm_sd. +source "drivers/mmc/host/Kconfig" endmenu diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile index 83ffb9326a5..9979f5e9765 100644 --- a/drivers/mmc/Makefile +++ b/drivers/mmc/Makefile @@ -2,32 +2,11 @@ # Makefile for the kernel mmc device drivers. # -# -# Core -# -obj-$(CONFIG_MMC) += mmc_core.o - -# -# Media drivers -# -obj-$(CONFIG_MMC_BLOCK) += mmc_block.o - -# -# Host drivers -# -obj-$(CONFIG_MMC_ARMMMCI) += mmci.o -obj-$(CONFIG_MMC_PXA) += pxamci.o -obj-$(CONFIG_MMC_IMX) += imxmmc.o -obj-$(CONFIG_MMC_SDHCI) += sdhci.o -obj-$(CONFIG_MMC_WBSD) += wbsd.o -obj-$(CONFIG_MMC_AU1X) += au1xmmc.o -obj-$(CONFIG_MMC_OMAP) += omap.o -obj-$(CONFIG_MMC_AT91) += at91_mci.o -obj-$(CONFIG_MMC_TIFM_SD) += tifm_sd.o - -mmc_core-y := mmc.o mmc_sysfs.o -mmc_core-$(CONFIG_BLOCK) += mmc_queue.o - ifeq ($(CONFIG_MMC_DEBUG),y) -EXTRA_CFLAGS += -DDEBUG + EXTRA_CFLAGS += -DDEBUG endif + +obj-$(CONFIG_MMC) += core/ +obj-$(CONFIG_MMC) += card/ +obj-$(CONFIG_MMC) += host/ + diff --git a/drivers/mmc/card/Kconfig b/drivers/mmc/card/Kconfig new file mode 100644 index 00000000000..01a9fd376a1 --- /dev/null +++ b/drivers/mmc/card/Kconfig @@ -0,0 +1,17 @@ +# +# MMC/SD card drivers +# + +comment "MMC/SD Card Drivers" + depends MMC + +config MMC_BLOCK + tristate "MMC block device driver" + depends on MMC && BLOCK + default y + help + Say Y here to enable the MMC block device driver support. + This provides a block device driver, which you can use to + mount the filesystem. Almost everyone wishing MMC support + should say Y or M here. + diff --git a/drivers/mmc/card/Makefile b/drivers/mmc/card/Makefile new file mode 100644 index 00000000000..cf8c939867f --- /dev/null +++ b/drivers/mmc/card/Makefile @@ -0,0 +1,11 @@ +# +# Makefile for MMC/SD card drivers +# + +ifeq ($(CONFIG_MMC_DEBUG),y) + EXTRA_CFLAGS += -DDEBUG +endif + +obj-$(CONFIG_MMC_BLOCK) += mmc_block.o +mmc_block-objs := block.o queue.o + diff --git a/drivers/mmc/mmc_block.c b/drivers/mmc/card/block.c index 86439a0bb27..d24ab234394 100644 --- a/drivers/mmc/mmc_block.c +++ b/drivers/mmc/card/block.c @@ -2,6 +2,7 @@ * Block driver for media (i.e., flash cards) * * Copyright 2002 Hewlett-Packard Company + * Copyright 2005-2007 Pierre Ossman * * Use consistent with the GNU GPL is permitted, * provided that this copyright notice is @@ -31,13 +32,13 @@ #include <linux/mmc/card.h> #include <linux/mmc/host.h> -#include <linux/mmc/protocol.h> -#include <linux/mmc/host.h> +#include <linux/mmc/mmc.h> +#include <linux/mmc/sd.h> #include <asm/system.h> #include <asm/uaccess.h> -#include "mmc_queue.h" +#include "queue.h" /* * max 8 partitions per card @@ -223,10 +224,9 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req) struct mmc_blk_data *md = mq->data; struct mmc_card *card = md->queue.card; struct mmc_blk_request brq; - int ret = 1; + int ret = 1, sg_pos, data_size; - if (mmc_card_claim_host(card)) - goto flush_queue; + mmc_claim_host(card->host); do { struct mmc_command cmd; @@ -283,6 +283,20 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req) brq.data.sg = mq->sg; brq.data.sg_len = blk_rq_map_sg(req->q, req, brq.data.sg); + if (brq.data.blocks != + (req->nr_sectors >> (md->block_bits - 9))) { + data_size = brq.data.blocks * brq.data.blksz; + for (sg_pos = 0; sg_pos < brq.data.sg_len; sg_pos++) { + data_size -= mq->sg[sg_pos].length; + if (data_size <= 0) { + mq->sg[sg_pos].length += data_size; + sg_pos++; + break; + } + } + brq.data.sg_len = sg_pos; + } + mmc_wait_for_req(card->host, &brq.mrq); if (brq.cmd.error) { printk(KERN_ERR "%s: error %d sending read/write command\n", @@ -342,7 +356,7 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req) spin_unlock_irq(&md->lock); } while (ret); - mmc_card_release_host(card); + mmc_release_host(card->host); return 1; @@ -378,9 +392,7 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req) spin_unlock_irq(&md->lock); } -flush_queue: - - mmc_card_release_host(card); + mmc_release_host(card->host); spin_lock_irq(&md->lock); while (ret) { @@ -477,11 +489,20 @@ static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card) blk_queue_hardsect_size(md->queue.queue, 1 << md->block_bits); - /* - * The CSD capacity field is in units of read_blkbits. - * set_capacity takes units of 512 bytes. - */ - set_capacity(md->disk, card->csd.capacity << (card->csd.read_blkbits - 9)); + if (!mmc_card_sd(card) && mmc_card_blockaddr(card)) { + /* + * The EXT_CSD sector count is in number or 512 byte + * sectors. + */ + set_capacity(md->disk, card->ext_csd.sectors); + } else { + /* + * The CSD capacity field is in units of read_blkbits. + * set_capacity takes units of 512 bytes. + */ + set_capacity(md->disk, + card->csd.capacity << (card->csd.read_blkbits - 9)); + } return md; err_putdisk: @@ -502,12 +523,12 @@ mmc_blk_set_blksize(struct mmc_blk_data *md, struct mmc_card *card) if (mmc_card_blockaddr(card)) return 0; - mmc_card_claim_host(card); + mmc_claim_host(card->host); cmd.opcode = MMC_SET_BLOCKLEN; cmd.arg = 1 << md->block_bits; cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; err = mmc_wait_for_cmd(card->host, &cmd, 5); - mmc_card_release_host(card); + mmc_release_host(card->host); if (err) { printk(KERN_ERR "%s: unable to set block size to %d: %d\n", diff --git a/drivers/mmc/mmc_queue.c b/drivers/mmc/card/queue.c index c27e42645cd..2e77963db33 100644 --- a/drivers/mmc/mmc_queue.c +++ b/drivers/mmc/card/queue.c @@ -1,7 +1,8 @@ /* - * linux/drivers/mmc/mmc_queue.c + * linux/drivers/mmc/queue.c * * Copyright (C) 2003 Russell King, All Rights Reserved. + * Copyright 2006-2007 Pierre Ossman * * 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 @@ -14,7 +15,7 @@ #include <linux/mmc/card.h> #include <linux/mmc/host.h> -#include "mmc_queue.h" +#include "queue.h" #define MMC_QUEUE_SUSPENDED (1 << 0) @@ -179,7 +180,6 @@ int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card, spinlock_t *lock blk_cleanup_queue(mq->queue); return ret; } -EXPORT_SYMBOL(mmc_init_queue); void mmc_cleanup_queue(struct mmc_queue *mq) { @@ -191,6 +191,9 @@ void mmc_cleanup_queue(struct mmc_queue *mq) q->queuedata = NULL; spin_unlock_irqrestore(q->queue_lock, flags); + /* Make sure the queue isn't suspended, as that will deadlock */ + mmc_queue_resume(mq); + /* Then terminate our worker thread */ kthread_stop(mq->thread); @@ -226,7 +229,6 @@ void mmc_queue_suspend(struct mmc_queue *mq) down(&mq->thread_sem); } } -EXPORT_SYMBOL(mmc_queue_suspend); /** * mmc_queue_resume - resume a previously suspended MMC request queue @@ -247,4 +249,4 @@ void mmc_queue_resume(struct mmc_queue *mq) spin_unlock_irqrestore(q->queue_lock, flags); } } -EXPORT_SYMBOL(mmc_queue_resume); + diff --git a/drivers/mmc/mmc_queue.h b/drivers/mmc/card/queue.h index c9f139e764f..c9f139e764f 100644 --- a/drivers/mmc/mmc_queue.h +++ b/drivers/mmc/card/queue.h diff --git a/drivers/mmc/core/Kconfig b/drivers/mmc/core/Kconfig new file mode 100644 index 00000000000..94222b9a15e --- /dev/null +++ b/drivers/mmc/core/Kconfig @@ -0,0 +1,17 @@ +# +# MMC core configuration +# + +config MMC_UNSAFE_RESUME + bool "Allow unsafe resume (DANGEROUS)" + depends on MMC != n + help + If you say Y here, the MMC layer will assume that all cards + stayed in their respective slots during the suspend. The + normal behaviour is to remove them at suspend and + redetecting them at resume. Breaking this assumption will + in most cases result in data corruption. + + This option is usually just for embedded systems which use + a MMC/SD card for rootfs. Most people should say N here. + diff --git a/drivers/mmc/core/Makefile b/drivers/mmc/core/Makefile new file mode 100644 index 00000000000..1075b02ae75 --- /dev/null +++ b/drivers/mmc/core/Makefile @@ -0,0 +1,11 @@ +# +# Makefile for the kernel mmc core. +# + +ifeq ($(CONFIG_MMC_DEBUG),y) + EXTRA_CFLAGS += -DDEBUG +endif + +obj-$(CONFIG_MMC) += mmc_core.o +mmc_core-y := core.o sysfs.o mmc.o mmc_ops.o sd.o sd_ops.o + diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c new file mode 100644 index 00000000000..72c7cf4a9f9 --- /dev/null +++ b/drivers/mmc/core/core.c @@ -0,0 +1,727 @@ +/* + * linux/drivers/mmc/core/core.c + * + * Copyright (C) 2003-2004 Russell King, All Rights Reserved. + * SD support Copyright (C) 2004 Ian Molton, All Rights Reserved. + * Copyright (C) 2005-2007 Pierre Ossman, All Rights Reserved. + * MMCv4 support Copyright (C) 2006 Philip Langdale, All Rights Reserved. + * + * 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. + */ +#include <linux/module.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/completion.h> +#include <linux/device.h> +#include <linux/delay.h> +#include <linux/pagemap.h> +#include <linux/err.h> +#include <asm/scatterlist.h> +#include <linux/scatterlist.h> + +#include <linux/mmc/card.h> +#include <linux/mmc/host.h> +#include <linux/mmc/mmc.h> +#include <linux/mmc/sd.h> + +#include "core.h" +#include "sysfs.h" + +#include "mmc_ops.h" +#include "sd_ops.h" + +extern int mmc_attach_mmc(struct mmc_host *host, u32 ocr); +extern int mmc_attach_sd(struct mmc_host *host, u32 ocr); + +/** + * mmc_request_done - finish processing an MMC request + * @host: MMC host which completed request + * @mrq: MMC request which request + * + * MMC drivers should call this function when they have completed + * their processing of a request. + */ +void mmc_request_done(struct mmc_host *host, struct mmc_request *mrq) +{ + struct mmc_command *cmd = mrq->cmd; + int err = cmd->error; + + pr_debug("%s: req done (CMD%u): %d/%d/%d: %08x %08x %08x %08x\n", + mmc_hostname(host), cmd->opcode, err, + mrq->data ? mrq->data->error : 0, + mrq->stop ? mrq->stop->error : 0, + cmd->resp[0], cmd->resp[1], cmd->resp[2], cmd->resp[3]); + + if (err && cmd->retries) { + cmd->retries--; + cmd->error = 0; + host->ops->request(host, mrq); + } else if (mrq->done) { + mrq->done(mrq); + } +} + +EXPORT_SYMBOL(mmc_request_done); + +/** + * mmc_start_request - start a command on a host + * @host: MMC host to start command on + * @mrq: MMC request to start + * + * Queue a command on the specified host. We expect the + * caller to be holding the host lock with interrupts disabled. + */ +void +mmc_start_request(struct mmc_host *host, struct mmc_request *mrq) +{ +#ifdef CONFIG_MMC_DEBUG + unsigned int i, sz; +#endif + + pr_debug("%s: starting CMD%u arg %08x flags %08x\n", + mmc_hostname(host), mrq->cmd->opcode, + mrq->cmd->arg, mrq->cmd->flags); + + WARN_ON(!host->claimed); + + mrq->cmd->error = 0; + mrq->cmd->mrq = mrq; + if (mrq->data) { + BUG_ON(mrq->data->blksz > host->max_blk_size); + BUG_ON(mrq->data->blocks > host->max_blk_count); + BUG_ON(mrq->data->blocks * mrq->data->blksz > + host->max_req_size); + +#ifdef CONFIG_MMC_DEBUG + sz = 0; + for (i = 0;i < mrq->data->sg_len;i++) + sz += mrq->data->sg[i].length; + BUG_ON(sz != mrq->data->blocks * mrq->data->blksz); +#endif + + mrq->cmd->data = mrq->data; + mrq->data->error = 0; + mrq->data->mrq = mrq; + if (mrq->stop) { + mrq->data->stop = mrq->stop; + mrq->stop->error = 0; + mrq->stop->mrq = mrq; + } + } + host->ops->request(host, mrq); +} + +EXPORT_SYMBOL(mmc_start_request); + +static void mmc_wait_done(struct mmc_request *mrq) +{ + complete(mrq->done_data); +} + +int mmc_wait_for_req(struct mmc_host *host, struct mmc_request *mrq) +{ + DECLARE_COMPLETION_ONSTACK(complete); + + mrq->done_data = &complete; + mrq->done = mmc_wait_done; + + mmc_start_request(host, mrq); + + wait_for_completion(&complete); + + return 0; +} + +EXPORT_SYMBOL(mmc_wait_for_req); + +/** + * mmc_wait_for_cmd - start a command and wait for completion + * @host: MMC host to start command + * @cmd: MMC command to start + * @retries: maximum number of retries + * + * Start a new MMC command for a host, and wait for the command + * to complete. Return any error that occurred while the command + * was executing. Do not attempt to parse the response. + */ +int mmc_wait_for_cmd(struct mmc_host *host, struct mmc_command *cmd, int retries) +{ + struct mmc_request mrq; + + BUG_ON(!host->claimed); + + memset(&mrq, 0, sizeof(struct mmc_request)); + + memset(cmd->resp, 0, sizeof(cmd->resp)); + cmd->retries = retries; + + mrq.cmd = cmd; + cmd->data = NULL; + + mmc_wait_for_req(host, &mrq); + + return cmd->error; +} + +EXPORT_SYMBOL(mmc_wait_for_cmd); + +/** + * mmc_set_data_timeout - set the timeout for a data command + * @data: data phase for command + * @card: the MMC card associated with the data transfer + * @write: flag to differentiate reads from writes + */ +void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card, + int write) +{ + unsigned int mult; + + /* + * SD cards use a 100 multiplier rather than 10 + */ + mult = mmc_card_sd(card) ? 100 : 10; + + /* + * Scale up the multiplier (and therefore the timeout) by + * the r2w factor for writes. + */ + if (write) + mult <<= card->csd.r2w_factor; + + data->timeout_ns = card->csd.tacc_ns * mult; + data->timeout_clks = card->csd.tacc_clks * mult; + + /* + * SD cards also have an upper limit on the timeout. + */ + if (mmc_card_sd(card)) { + unsigned int timeout_us, limit_us; + + timeout_us = data->timeout_ns / 1000; + timeout_us += data->timeout_clks * 1000 / + (card->host->ios.clock / 1000); + + if (write) + limit_us = 250000; + else + limit_us = 100000; + + /* + * SDHC cards always use these fixed values. + */ + if (timeout_us > limit_us || mmc_card_blockaddr(card)) { + data->timeout_ns = limit_us * 1000; + data->timeout_clks = 0; + } + } +} +EXPORT_SYMBOL(mmc_set_data_timeout); + +/** + * __mmc_claim_host - exclusively claim a host + * @host: mmc host to claim + * @card: mmc card to claim host for + * + * Claim a host for a set of operations. If a valid card + * is passed and this wasn't the last card selected, select + * the card before returning. + * + * Note: you should use mmc_card_claim_host or mmc_claim_host. + */ +void mmc_claim_host(struct mmc_host *host) +{ + DECLARE_WAITQUEUE(wait, current); + unsigned long flags; + + add_wait_queue(&host->wq, &wait); + spin_lock_irqsave(&host->lock, flags); + while (1) { + set_current_state(TASK_UNINTERRUPTIBLE); + if (!host->claimed) + break; + spin_unlock_irqrestore(&host->lock, flags); + schedule(); + spin_lock_irqsave(&host->lock, flags); + } + set_current_state(TASK_RUNNING); + host->claimed = 1; + spin_unlock_irqrestore(&host->lock, flags); + remove_wait_queue(&host->wq, &wait); +} + +EXPORT_SYMBOL(mmc_claim_host); + +/** + * mmc_release_host - release a host + * @host: mmc host to release + * + * Release a MMC host, allowing others to claim the host + * for their operations. + */ +void mmc_release_host(struct mmc_host *host) +{ + unsigned long flags; + + BUG_ON(!host->claimed); + + spin_lock_irqsave(&host->lock, flags); + host->claimed = 0; + spin_unlock_irqrestore(&host->lock, flags); + + wake_up(&host->wq); +} + +EXPORT_SYMBOL(mmc_release_host); + +/* + * Internal function that does the actual ios call to the host driver, + * optionally printing some debug output. + */ +static inline void mmc_set_ios(struct mmc_host *host) +{ + struct mmc_ios *ios = &host->ios; + + pr_debug("%s: clock %uHz busmode %u powermode %u cs %u Vdd %u " + "width %u timing %u\n", + mmc_hostname(host), ios->clock, ios->bus_mode, + ios->power_mode, ios->chip_select, ios->vdd, + ios->bus_width, ios->timing); + + host->ops->set_ios(host, ios); +} + +/* + * Control chip select pin on a host. + */ +void mmc_set_chip_select(struct mmc_host *host, int mode) +{ + host->ios.chip_select = mode; + mmc_set_ios(host); +} + +/* + * Sets the host clock to the highest possible frequency that + * is below "hz". + */ +void mmc_set_clock(struct mmc_host *host, unsigned int hz) +{ + WARN_ON(hz < host->f_min); + + if (hz > host->f_max) + hz = host->f_max; + + host->ios.clock = hz; + mmc_set_ios(host); +} + +/* + * Change the bus mode (open drain/push-pull) of a host. + */ +void mmc_set_bus_mode(struct mmc_host *host, unsigned int mode) +{ + host->ios.bus_mode = mode; + mmc_set_ios(host); +} + +/* + * Change data bus width of a host. + */ +void mmc_set_bus_width(struct mmc_host *host, unsigned int width) +{ + host->ios.bus_width = width; + mmc_set_ios(host); +} + +/* + * Mask off any voltages we don't support and select + * the lowest voltage + */ +u32 mmc_select_voltage(struct mmc_host *host, u32 ocr) +{ + int bit; + + ocr &= host->ocr_avail; + + bit = ffs(ocr); + if (bit) { + bit -= 1; + + ocr &= 3 << bit; + + host->ios.vdd = bit; + mmc_set_ios(host); + } else { + ocr = 0; + } + + return ocr; +} + +/* + * Select timing parameters for host. + */ +void mmc_set_timing(struct mmc_host *host, unsigned int timing) +{ + host->ios.timing = timing; + mmc_set_ios(host); +} + +/* + * Allocate a new MMC card + */ +struct mmc_card *mmc_alloc_card(struct mmc_host *host) +{ + struct mmc_card *card; + + card = kmalloc(sizeof(struct mmc_card), GFP_KERNEL); + if (!card) + return ERR_PTR(-ENOMEM); + + mmc_init_card(card, host); + + return card; +} + +/* + * Apply power to the MMC stack. This is a two-stage process. + * First, we enable power to the card without the clock running. + * We then wait a bit for the power to stabilise. Finally, + * enable the bus drivers and clock to the card. + * + * We must _NOT_ enable the clock prior to power stablising. + * + * If a host does all the power sequencing itself, ignore the + * initial MMC_POWER_UP stage. + */ +static void mmc_power_up(struct mmc_host *host) +{ + int bit = fls(host->ocr_avail) - 1; + + host->ios.vdd = bit; + host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN; + host->ios.chip_select = MMC_CS_DONTCARE; + host->ios.power_mode = MMC_POWER_UP; + host->ios.bus_width = MMC_BUS_WIDTH_1; + host->ios.timing = MMC_TIMING_LEGACY; + mmc_set_ios(host); + + mmc_delay(1); + + host->ios.clock = host->f_min; + host->ios.power_mode = MMC_POWER_ON; + mmc_set_ios(host); + + mmc_delay(2); +} + +static void mmc_power_off(struct mmc_host *host) +{ + host->ios.clock = 0; + host->ios.vdd = 0; + host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN; + host->ios.chip_select = MMC_CS_DONTCARE; + host->ios.power_mode = MMC_POWER_OFF; + host->ios.bus_width = MMC_BUS_WIDTH_1; + host->ios.timing = MMC_TIMING_LEGACY; + mmc_set_ios(host); +} + +/* + * Assign a mmc bus handler to a host. Only one bus handler may control a + * host at any given time. + */ +void mmc_attach_bus(struct mmc_host *host, const struct mmc_bus_ops *ops) +{ + unsigned long flags; + + BUG_ON(!host); + BUG_ON(!ops); + + BUG_ON(!host->claimed); + + spin_lock_irqsave(&host->lock, flags); + + BUG_ON(host->bus_ops); + BUG_ON(host->bus_refs); + + host->bus_ops = ops; + host->bus_refs = 1; + host->bus_dead = 0; + + spin_unlock_irqrestore(&host->lock, flags); +} + +/* + * Remove the current bus handler from a host. Assumes that there are + * no interesting cards left, so the bus is powered down. + */ +void mmc_detach_bus(struct mmc_host *host) +{ + unsigned long flags; + + BUG_ON(!host); + + BUG_ON(!host->claimed); + BUG_ON(!host->bus_ops); + + spin_lock_irqsave(&host->lock, flags); + + host->bus_dead = 1; + + spin_unlock_irqrestore(&host->lock, flags); + + mmc_power_off(host); + + mmc_bus_put(host); +} + +/* + * Cleanup when the last reference to the bus operator is dropped. + */ +void __mmc_release_bus(struct mmc_host *host) +{ + BUG_ON(!host); + BUG_ON(host->bus_refs); + BUG_ON(!host->bus_dead); + + host->bus_ops = NULL; +} + +/** + * mmc_detect_change - process change of state on a MMC socket + * @host: host which changed state. + * @delay: optional delay to wait before detection (jiffies) + * + * All we know is that card(s) have been inserted or removed + * from the socket(s). We don't know which socket or cards. + */ +void mmc_detect_change(struct mmc_host *host, unsigned long delay) +{ +#ifdef CONFIG_MMC_DEBUG + mmc_claim_host(host); + BUG_ON(host->removed); + mmc_release_host(host); +#endif + + mmc_schedule_delayed_work(&host->detect, delay); +} + +EXPORT_SYMBOL(mmc_detect_change); + + +static void mmc_rescan(struct work_struct *work) +{ + struct mmc_host *host = + container_of(work, struct mmc_host, detect.work); + u32 ocr; + int err; + + mmc_bus_get(host); + + if (host->bus_ops == NULL) { + /* + * Only we can add a new handler, so it's safe to + * release the lock here. + */ + mmc_bus_put(host); + + mmc_claim_host(host); + + mmc_power_up(host); + mmc_go_idle(host); + + mmc_send_if_cond(host, host->ocr_avail); + + err = mmc_send_app_op_cond(host, 0, &ocr); + if (err == MMC_ERR_NONE) { + if (mmc_attach_sd(host, ocr)) + mmc_power_off(host); + } else { + /* + * If we fail to detect any SD cards then try + * searching for MMC cards. + */ + err = mmc_send_op_cond(host, 0, &ocr); + if (err == MMC_ERR_NONE) { + if (mmc_attach_mmc(host, ocr)) + mmc_power_off(host); + } else { + mmc_power_off(host); + mmc_release_host(host); + } + } + } else { + if (host->bus_ops->detect && !host->bus_dead) + host->bus_ops->detect(host); + + mmc_bus_put(host); + } +} + + +/** + * mmc_alloc_host - initialise the per-host structure. + * @extra: sizeof private data structure + * @dev: pointer to host device model structure + * + * Initialise the per-host structure. + */ +struct mmc_host *mmc_alloc_host(int extra, struct device *dev) +{ + struct mmc_host *host; + + host = mmc_alloc_host_sysfs(extra, dev); + if (host) { + spin_lock_init(&host->lock); + init_waitqueue_head(&host->wq); + INIT_DELAYED_WORK(&host->detect, mmc_rescan); + + /* + * By default, hosts do not support SGIO or large requests. + * They have to set these according to their abilities. + */ + host->max_hw_segs = 1; + host->max_phys_segs = 1; + host->max_seg_size = PAGE_CACHE_SIZE; + + host->max_req_size = PAGE_CACHE_SIZE; + host->max_blk_size = 512; + host->max_blk_count = PAGE_CACHE_SIZE / 512; + } + + return host; +} + +EXPORT_SYMBOL(mmc_alloc_host); + +/** + * mmc_add_host - initialise host hardware + * @host: mmc host + */ +int mmc_add_host(struct mmc_host *host) +{ + int ret; + + ret = mmc_add_host_sysfs(host); + if (ret == 0) { + mmc_power_off(host); + mmc_detect_change(host, 0); + } + + return ret; +} + +EXPORT_SYMBOL(mmc_add_host); + +/** + * mmc_remove_host - remove host hardware + * @host: mmc host + * + * Unregister and remove all cards associated with this host, + * and power down the MMC bus. + */ +void mmc_remove_host(struct mmc_host *host) +{ +#ifdef CONFIG_MMC_DEBUG + mmc_claim_host(host); + host->removed = 1; + mmc_release_host(host); +#endif + + mmc_flush_scheduled_work(); + + mmc_bus_get(host); + if (host->bus_ops && !host->bus_dead) { + if (host->bus_ops->remove) + host->bus_ops->remove(host); + + mmc_claim_host(host); + mmc_detach_bus(host); + mmc_release_host(host); + } + mmc_bus_put(host); + + BUG_ON(host->card); + + mmc_power_off(host); + mmc_remove_host_sysfs(host); +} + +EXPORT_SYMBOL(mmc_remove_host); + +/** + * mmc_free_host - free the host structure + * @host: mmc host + * + * Free the host once all references to it have been dropped. + */ +void mmc_free_host(struct mmc_host *host) +{ + mmc_free_host_sysfs(host); +} + +EXPORT_SYMBOL(mmc_free_host); + +#ifdef CONFIG_PM + +/** + * mmc_suspend_host - suspend a host + * @host: mmc host + * @state: suspend mode (PM_SUSPEND_xxx) + */ +int mmc_suspend_host(struct mmc_host *host, pm_message_t state) +{ + mmc_flush_scheduled_work(); + + mmc_bus_get(host); + if (host->bus_ops && !host->bus_dead) { + if (host->bus_ops->suspend) + host->bus_ops->suspend(host); + if (!host->bus_ops->resume) { + if (host->bus_ops->remove) + host->bus_ops->remove(host); + + mmc_claim_host(host); + mmc_detach_bus(host); + mmc_release_host(host); + } + } + mmc_bus_put(host); + + mmc_power_off(host); + + return 0; +} + +EXPORT_SYMBOL(mmc_suspend_host); + +/** + * mmc_resume_host - resume a previously suspended host + * @host: mmc host + */ +int mmc_resume_host(struct mmc_host *host) +{ + mmc_bus_get(host); + if (host->bus_ops && !host->bus_dead) { + mmc_power_up(host); + BUG_ON(!host->bus_ops->resume); + host->bus_ops->resume(host); + } + mmc_bus_put(host); + + /* + * We add a slight delay here so that resume can progress + * in parallel. + */ + mmc_detect_change(host, 1); + + return 0; +} + +EXPORT_SYMBOL(mmc_resume_host); + +#endif + +MODULE_LICENSE("GPL"); diff --git a/drivers/mmc/core/core.h b/drivers/mmc/core/core.h new file mode 100644 index 00000000000..177264d090a --- /dev/null +++ b/drivers/mmc/core/core.h @@ -0,0 +1,70 @@ +/* + * linux/drivers/mmc/core/core.h + * + * Copyright (C) 2003 Russell King, All Rights Reserved. + * Copyright 2007 Pierre Ossman + * + * 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. + */ +#ifndef _MMC_CORE_CORE_H +#define _MMC_CORE_CORE_H + +#include <linux/delay.h> + +#define MMC_CMD_RETRIES 3 + +struct mmc_bus_ops { + void (*remove)(struct mmc_host *); + void (*detect)(struct mmc_host *); + void (*suspend)(struct mmc_host *); + void (*resume)(struct mmc_host *); +}; + +void mmc_attach_bus(struct mmc_host *host, const struct mmc_bus_ops *ops); +void mmc_detach_bus(struct mmc_host *host); + +void __mmc_release_bus(struct mmc_host *host); + +static inline void mmc_bus_get(struct mmc_host *host) +{ + unsigned long flags; + + spin_lock_irqsave(&host->lock, flags); + host->bus_refs++; + spin_unlock_irqrestore(&host->lock, flags); +} + +static inline void mmc_bus_put(struct mmc_host *host) +{ + unsigned long flags; + + spin_lock_irqsave(&host->lock, flags); + host->bus_refs--; + if ((host->bus_refs == 0) && host->bus_ops) + __mmc_release_bus(host); + spin_unlock_irqrestore(&host->lock, flags); +} + +void mmc_set_chip_select(struct mmc_host *host, int mode); +void mmc_set_clock(struct mmc_host *host, unsigned int hz); +void mmc_set_bus_mode(struct mmc_host *host, unsigned int mode); +void mmc_set_bus_width(struct mmc_host *host, unsigned int width); +u32 mmc_select_voltage(struct mmc_host *host, u32 ocr); +void mmc_set_timing(struct mmc_host *host, unsigned int timing); + +struct mmc_card *mmc_alloc_card(struct mmc_host *host); + +static inline void mmc_delay(unsigned int ms) +{ + if (ms < 1000 / HZ) { + cond_resched(); + mdelay(ms); + } else { + msleep(ms); + } +} + +#endif + diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c new file mode 100644 index 00000000000..42cc2867ed7 --- /dev/null +++ b/drivers/mmc/core/mmc.c @@ -0,0 +1,537 @@ +/* + * linux/drivers/mmc/mmc.c + * + * Copyright (C) 2003-2004 Russell King, All Rights Reserved. + * Copyright (C) 2005-2007 Pierre Ossman, All Rights Reserved. + * MMCv4 support Copyright (C) 2006 Philip Langdale, All Rights Reserved. + * + * 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. + */ + +#include <linux/err.h> + +#include <linux/mmc/host.h> +#include <linux/mmc/card.h> +#include <linux/mmc/mmc.h> + +#include "core.h" +#include "sysfs.h" +#include "mmc_ops.h" + +static const unsigned int tran_exp[] = { + 10000, 100000, 1000000, 10000000, + 0, 0, 0, 0 +}; + +static const unsigned char tran_mant[] = { + 0, 10, 12, 13, 15, 20, 25, 30, + 35, 40, 45, 50, 55, 60, 70, 80, +}; + +static const unsigned int tacc_exp[] = { + 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, +}; + +static const unsigned int tacc_mant[] = { + 0, 10, 12, 13, 15, 20, 25, 30, + 35, 40, 45, 50, 55, 60, 70, 80, +}; + +#define UNSTUFF_BITS(resp,start,size) \ + ({ \ + const int __size = size; \ + const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \ + const int __off = 3 - ((start) / 32); \ + const int __shft = (start) & 31; \ + u32 __res; \ + \ + __res = resp[__off] >> __shft; \ + if (__size + __shft > 32) \ + __res |= resp[__off-1] << ((32 - __shft) % 32); \ + __res & __mask; \ + }) + +/* + * Given the decoded CSD structure, decode the raw CID to our CID structure. + */ +static int mmc_decode_cid(struct mmc_card *card) +{ + u32 *resp = card->raw_cid; + + /* + * The selection of the format here is based upon published + * specs from sandisk and from what people have reported. + */ + switch (card->csd.mmca_vsn) { + case 0: /* MMC v1.0 - v1.2 */ + case 1: /* MMC v1.4 */ + card->cid.manfid = UNSTUFF_BITS(resp, 104, 24); + card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8); + card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8); + card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8); + card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8); + card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8); + card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8); + card->cid.prod_name[6] = UNSTUFF_BITS(resp, 48, 8); + card->cid.hwrev = UNSTUFF_BITS(resp, 44, 4); + card->cid.fwrev = UNSTUFF_BITS(resp, 40, 4); + card->cid.serial = UNSTUFF_BITS(resp, 16, 24); + card->cid.month = UNSTUFF_BITS(resp, 12, 4); + card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997; + break; + + case 2: /* MMC v2.0 - v2.2 */ + case 3: /* MMC v3.1 - v3.3 */ + case 4: /* MMC v4 */ + card->cid.manfid = UNSTUFF_BITS(resp, 120, 8); + card->cid.oemid = UNSTUFF_BITS(resp, 104, 16); + card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8); + card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8); + card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8); + card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8); + card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8); + card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8); + card->cid.serial = UNSTUFF_BITS(resp, 16, 32); + card->cid.month = UNSTUFF_BITS(resp, 12, 4); + card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997; + break; + + default: + printk("%s: card has unknown MMCA version %d\n", + mmc_hostname(card->host), card->csd.mmca_vsn); + return -EINVAL; + } + + return 0; +} + +/* + * Given a 128-bit response, decode to our card CSD structure. + */ +static int mmc_decode_csd(struct mmc_card *card) +{ + struct mmc_csd *csd = &card->csd; + unsigned int e, m, csd_struct; + u32 *resp = card->raw_csd; + + /* + * We only understand CSD structure v1.1 and v1.2. + * v1.2 has extra information in bits 15, 11 and 10. + */ + csd_struct = UNSTUFF_BITS(resp, 126, 2); + if (csd_struct != 1 && csd_struct != 2) { + printk("%s: unrecognised CSD structure version %d\n", + mmc_hostname(card->host), csd_struct); + return -EINVAL; + } + + csd->mmca_vsn = UNSTUFF_BITS(resp, 122, 4); + m = UNSTUFF_BITS(resp, 115, 4); + e = UNSTUFF_BITS(resp, 112, 3); + csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10; + csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100; + + m = UNSTUFF_BITS(resp, 99, 4); + e = UNSTUFF_BITS(resp, 96, 3); + csd->max_dtr = tran_exp[e] * tran_mant[m]; + csd->cmdclass = UNSTUFF_BITS(resp, 84, 12); + + e = UNSTUFF_BITS(resp, 47, 3); + m = UNSTUFF_BITS(resp, 62, 12); + csd->capacity = (1 + m) << (e + 2); + + csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4); + csd->read_partial = UNSTUFF_BITS(resp, 79, 1); + csd->write_misalign = UNSTUFF_BITS(resp, 78, 1); + csd->read_misalign = UNSTUFF_BITS(resp, 77, 1); + csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3); + csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4); + csd->write_partial = UNSTUFF_BITS(resp, 21, 1); + + return 0; +} + +/* + * Read and decode extended CSD. + */ +static int mmc_read_ext_csd(struct mmc_card *card) +{ + int err; + u8 *ext_csd; + + BUG_ON(!card); + + err = MMC_ERR_FAILED; + + if (card->csd.mmca_vsn < CSD_SPEC_VER_4) + return MMC_ERR_NONE; + + /* + * As the ext_csd is so large and mostly unused, we don't store the + * raw block in mmc_card. + */ + ext_csd = kmalloc(512, GFP_KERNEL); + if (!ext_csd) { + printk(KERN_ERR "%s: could not allocate a buffer to " + "receive the ext_csd. mmc v4 cards will be " + "treated as v3.\n", mmc_hostname(card->host)); + return MMC_ERR_FAILED; + } + + err = mmc_send_ext_csd(card, ext_csd); + if (err != MMC_ERR_NONE) { + /* + * High capacity cards should have this "magic" size + * stored in their CSD. + */ + if (card->csd.capacity == (4096 * 512)) { + printk(KERN_ERR "%s: unable to read EXT_CSD " + "on a possible high capacity card. " + "Card will be ignored.\n", + mmc_hostname(card->host)); + } else { + printk(KERN_WARNING "%s: unable to read " + "EXT_CSD, performance might " + "suffer.\n", + mmc_hostname(card->host)); + err = MMC_ERR_NONE; + } + goto out; + } + + card->ext_csd.sectors = + ext_csd[EXT_CSD_SEC_CNT + 0] << 0 | + ext_csd[EXT_CSD_SEC_CNT + 1] << 8 | + ext_csd[EXT_CSD_SEC_CNT + 2] << 16 | + ext_csd[EXT_CSD_SEC_CNT + 3] << 24; + if (card->ext_csd.sectors) + mmc_card_set_blockaddr(card); + + switch (ext_csd[EXT_CSD_CARD_TYPE]) { + case EXT_CSD_CARD_TYPE_52 | EXT_CSD_CARD_TYPE_26: + card->ext_csd.hs_max_dtr = 52000000; + break; + case EXT_CSD_CARD_TYPE_26: + card->ext_csd.hs_max_dtr = 26000000; + break; + default: + /* MMC v4 spec says this cannot happen */ + printk(KERN_WARNING "%s: card is mmc v4 but doesn't " + "support any high-speed modes.\n", + mmc_hostname(card->host)); + goto out; + } + +out: + kfree(ext_csd); + + return err; +} + +/* + * Handle the detection and initialisation of a card. + * + * In the case of a resume, "curcard" will contain the card + * we're trying to reinitialise. + */ +static int mmc_sd_init_card(struct mmc_host *host, u32 ocr, + struct mmc_card *oldcard) +{ + struct mmc_card *card; + int err; + u32 cid[4]; + unsigned int max_dtr; + + BUG_ON(!host); + BUG_ON(!host->claimed); + + /* + * Since we're changing the OCR value, we seem to + * need to tell some cards to go back to the idle + * state. We wait 1ms to give cards time to + * respond. + */ + mmc_go_idle(host); + + /* The extra bit indicates that we support high capacity */ + err = mmc_send_op_cond(host, ocr | (1 << 30), NULL); + if (err != MMC_ERR_NONE) + goto err; + + /* + * Fetch CID from card. + */ + err = mmc_all_send_cid(host, cid); + if (err != MMC_ERR_NONE) + goto err; + + if (oldcard) { + if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) + goto err; + + card = oldcard; + } else { + /* + * Allocate card structure. + */ + card = mmc_alloc_card(host); + if (IS_ERR(card)) + goto err; + + card->type = MMC_TYPE_MMC; + card->rca = 1; + memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); + } + + /* + * Set card RCA. + */ + err = mmc_set_relative_addr(card); + if (err != MMC_ERR_NONE) + goto free_card; + + mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL); + + if (!oldcard) { + /* + * Fetch CSD from card. + */ + err = mmc_send_csd(card, card->raw_csd); + if (err != MMC_ERR_NONE) + goto free_card; + + err = mmc_decode_csd(card); + if (err < 0) + goto free_card; + err = mmc_decode_cid(card); + if (err < 0) + goto free_card; + } + + /* + * Select card, as all following commands rely on that. + */ + err = mmc_select_card(card); + if (err != MMC_ERR_NONE) + goto free_card; + + if (!oldcard) { + /* + * Fetch and process extened CSD. + */ + err = mmc_read_ext_csd(card); + if (err != MMC_ERR_NONE) + goto free_card; + } + + /* + * Activate high speed (if supported) + */ + if ((card->ext_csd.hs_max_dtr != 0) && + (host->caps & MMC_CAP_MMC_HIGHSPEED)) { + err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, + EXT_CSD_HS_TIMING, 1); + if (err != MMC_ERR_NONE) + goto free_card; + + mmc_card_set_highspeed(card); + + mmc_set_timing(card->host, MMC_TIMING_MMC_HS); + } + + /* + * Compute bus speed. + */ + max_dtr = (unsigned int)-1; + + if (mmc_card_highspeed(card)) { + if (max_dtr > card->ext_csd.hs_max_dtr) + max_dtr = card->ext_csd.hs_max_dtr; + } else if (max_dtr > card->csd.max_dtr) { + max_dtr = card->csd.max_dtr; + } + + mmc_set_clock(host, max_dtr); + + /* + * Activate wide bus (if supported). + */ + if ((card->csd.mmca_vsn >= CSD_SPEC_VER_4) && + (host->caps & MMC_CAP_4_BIT_DATA)) { + err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, + EXT_CSD_BUS_WIDTH, EXT_CSD_BUS_WIDTH_4); + if (err != MMC_ERR_NONE) + goto free_card; + + mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4); + } + + if (!oldcard) + host->card = card; + + return MMC_ERR_NONE; + +free_card: + if (!oldcard) + mmc_remove_card(card); +err: + + return MMC_ERR_FAILED; +} + +/* + * Host is being removed. Free up the current card. + */ +static void mmc_remove(struct mmc_host *host) +{ + BUG_ON(!host); + BUG_ON(!host->card); + + mmc_remove_card(host->card); + host->card = NULL; +} + +/* + * Card detection callback from host. + */ +static void mmc_detect(struct mmc_host *host) +{ + int err; + + BUG_ON(!host); + BUG_ON(!host->card); + + mmc_claim_host(host); + + /* + * Just check if our card has been removed. + */ + err = mmc_send_status(host->card, NULL); + + mmc_release_host(host); + + if (err != MMC_ERR_NONE) { + mmc_remove_card(host->card); + host->card = NULL; + + mmc_claim_host(host); + mmc_detach_bus(host); + mmc_release_host(host); + } +} + +#ifdef CONFIG_MMC_UNSAFE_RESUME + +/* + * Suspend callback from host. + */ +static void mmc_suspend(struct mmc_host *host) +{ + BUG_ON(!host); + BUG_ON(!host->card); + + mmc_claim_host(host); + mmc_deselect_cards(host); + host->card->state &= ~MMC_STATE_HIGHSPEED; + mmc_release_host(host); +} + +/* + * Resume callback from host. + * + * This function tries to determine if the same card is still present + * and, if so, restore all state to it. + */ +static void mmc_resume(struct mmc_host *host) +{ + int err; + + BUG_ON(!host); + BUG_ON(!host->card); + + mmc_claim_host(host); + + err = mmc_sd_init_card(host, host->ocr, host->card); + if (err != MMC_ERR_NONE) { + mmc_remove_card(host->card); + host->card = NULL; + + mmc_detach_bus(host); + } + + mmc_release_host(host); +} + +#else + +#define mmc_suspend NULL +#define mmc_resume NULL + +#endif + +static const struct mmc_bus_ops mmc_ops = { + .remove = mmc_remove, + .detect = mmc_detect, + .suspend = mmc_suspend, + .resume = mmc_resume, +}; + +/* + * Starting point for MMC card init. + */ +int mmc_attach_mmc(struct mmc_host *host, u32 ocr) +{ + int err; + + BUG_ON(!host); + BUG_ON(!host->claimed); + + mmc_attach_bus(host, &mmc_ops); + + /* + * Sanity check the voltages that the card claims to + * support. + */ + if (ocr & 0x7F) { + printk(KERN_WARNING "%s: card claims to support voltages " + "below the defined range. These will be ignored.\n", + mmc_hostname(host)); + ocr &= ~0x7F; + } + + host->ocr = mmc_select_voltage(host, ocr); + + /* + * Can we support the voltage of the card? + */ + if (!host->ocr) + goto err; + + /* + * Detect and init the card. + */ + err = mmc_sd_init_card(host, host->ocr, NULL); + if (err != MMC_ERR_NONE) + goto err; + + mmc_release_host(host); + + err = mmc_register_card(host->card); + if (err) + goto reclaim_host; + + return 0; + +reclaim_host: + mmc_claim_host(host); + mmc_remove_card(host->card); + host->card = NULL; +err: + mmc_detach_bus(host); + mmc_release_host(host); + + return 0; +} + diff --git a/drivers/mmc/core/mmc_ops.c b/drivers/mmc/core/mmc_ops.c new file mode 100644 index 00000000000..7dd720fa589 --- /dev/null +++ b/drivers/mmc/core/mmc_ops.c @@ -0,0 +1,276 @@ +/* + * linux/drivers/mmc/mmc_ops.h + * + * Copyright 2006-2007 Pierre Ossman + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or (at + * your option) any later version. + */ + +#include <linux/types.h> +#include <asm/scatterlist.h> +#include <linux/scatterlist.h> + +#include <linux/mmc/host.h> +#include <linux/mmc/card.h> +#include <linux/mmc/mmc.h> + +#include "core.h" +#include "mmc_ops.h" + +static int _mmc_select_card(struct mmc_host *host, struct mmc_card *card) +{ + int err; + struct mmc_command cmd; + + BUG_ON(!host); + + memset(&cmd, 0, sizeof(struct mmc_command)); + + cmd.opcode = MMC_SELECT_CARD; + + if (card) { + cmd.arg = card->rca << 16; + cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; + } else { + cmd.arg = 0; + cmd.flags = MMC_RSP_NONE | MMC_CMD_AC; + } + + err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES); + if (err != MMC_ERR_NONE) + return err; + + return MMC_ERR_NONE; +} + +int mmc_select_card(struct mmc_card *card) +{ + BUG_ON(!card); + + return _mmc_select_card(card->host, card); +} + +int mmc_deselect_cards(struct mmc_host *host) +{ + return _mmc_select_card(host, NULL); +} + +int mmc_go_idle(struct mmc_host *host) +{ + int err; + struct mmc_command cmd; + + mmc_set_chip_select(host, MMC_CS_HIGH); + + mmc_delay(1); + + memset(&cmd, 0, sizeof(struct mmc_command)); + + cmd.opcode = MMC_GO_IDLE_STATE; + cmd.arg = 0; + cmd.flags = MMC_RSP_NONE | MMC_CMD_BC; + + err = mmc_wait_for_cmd(host, &cmd, 0); + + mmc_delay(1); + + mmc_set_chip_select(host, MMC_CS_DONTCARE); + + mmc_delay(1); + + return err; +} + +int mmc_send_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr) +{ + struct mmc_command cmd; + int i, err = 0; + + BUG_ON(!host); + + memset(&cmd, 0, sizeof(struct mmc_command)); + + cmd.opcode = MMC_SEND_OP_COND; + cmd.arg = ocr; + cmd.flags = MMC_RSP_R3 | MMC_CMD_BCR; + + for (i = 100; i; i--) { + err = mmc_wait_for_cmd(host, &cmd, 0); + if (err != MMC_ERR_NONE) + break; + + if (cmd.resp[0] & MMC_CARD_BUSY || ocr == 0) + break; + + err = MMC_ERR_TIMEOUT; + + mmc_delay(10); + } + + if (rocr) + *rocr = cmd.resp[0]; + + return err; +} + +int mmc_all_send_cid(struct mmc_host *host, u32 *cid) +{ + int err; + struct mmc_command cmd; + + BUG_ON(!host); + BUG_ON(!cid); + + memset(&cmd, 0, sizeof(struct mmc_command)); + + cmd.opcode = MMC_ALL_SEND_CID; + cmd.arg = 0; + cmd.flags = MMC_RSP_R2 | MMC_CMD_BCR; + + err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES); + if (err != MMC_ERR_NONE) + return err; + + memcpy(cid, cmd.resp, sizeof(u32) * 4); + + return MMC_ERR_NONE; +} + +int mmc_set_relative_addr(struct mmc_card *card) +{ + int err; + struct mmc_command cmd; + + BUG_ON(!card); + BUG_ON(!card->host); + + memset(&cmd, 0, sizeof(struct mmc_command)); + + cmd.opcode = MMC_SET_RELATIVE_ADDR; + cmd.arg = card->rca << 16; + cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; + + err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES); + if (err != MMC_ERR_NONE) + return err; + + return MMC_ERR_NONE; +} + +int mmc_send_csd(struct mmc_card *card, u32 *csd) +{ + int err; + struct mmc_command cmd; + + BUG_ON(!card); + BUG_ON(!card->host); + BUG_ON(!csd); + + memset(&cmd, 0, sizeof(struct mmc_command)); + + cmd.opcode = MMC_SEND_CSD; + cmd.arg = card->rca << 16; + cmd.flags = MMC_RSP_R2 | MMC_CMD_AC; + + err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES); + if (err != MMC_ERR_NONE) + return err; + + memcpy(csd, cmd.resp, sizeof(u32) * 4); + + return MMC_ERR_NONE; +} + +int mmc_send_ext_csd(struct mmc_card *card, u8 *ext_csd) +{ + struct mmc_request mrq; + struct mmc_command cmd; + struct mmc_data data; + struct scatterlist sg; + + BUG_ON(!card); + BUG_ON(!card->host); + BUG_ON(!ext_csd); + + memset(&mrq, 0, sizeof(struct mmc_request)); + memset(&cmd, 0, sizeof(struct mmc_command)); + memset(&data, 0, sizeof(struct mmc_data)); + + mrq.cmd = &cmd; + mrq.data = &data; + + cmd.opcode = MMC_SEND_EXT_CSD; + cmd.arg = 0; + cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; + + data.blksz = 512; + data.blocks = 1; + data.flags = MMC_DATA_READ; + data.sg = &sg; + data.sg_len = 1; + + sg_init_one(&sg, ext_csd, 512); + + mmc_set_data_timeout(&data, card, 0); + + mmc_wait_for_req(card->host, &mrq); + + if (cmd.error != MMC_ERR_NONE) + return cmd.error; + if (data.error != MMC_ERR_NONE) + return data.error; + + return MMC_ERR_NONE; +} + +int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value) +{ + int err; + struct mmc_command cmd; + + BUG_ON(!card); + BUG_ON(!card->host); + + memset(&cmd, 0, sizeof(struct mmc_command)); + + cmd.opcode = MMC_SWITCH; + cmd.arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) | + (index << 16) | + (value << 8) | + set; + cmd.flags = MMC_RSP_R1B | MMC_CMD_AC; + + err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES); + if (err != MMC_ERR_NONE) + return err; + + return MMC_ERR_NONE; +} + +int mmc_send_status(struct mmc_card *card, u32 *status) +{ + int err; + struct mmc_command cmd; + + BUG_ON(!card); + BUG_ON(!card->host); + + memset(&cmd, 0, sizeof(struct mmc_command)); + + cmd.opcode = MMC_SEND_STATUS; + cmd.arg = card->rca << 16; + cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; + + err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES); + if (err != MMC_ERR_NONE) + return err; + + if (status) + *status = cmd.resp[0]; + + return MMC_ERR_NONE; +} + diff --git a/drivers/mmc/core/mmc_ops.h b/drivers/mmc/core/mmc_ops.h new file mode 100644 index 00000000000..7a481e8ca5e --- /dev/null +++ b/drivers/mmc/core/mmc_ops.h @@ -0,0 +1,27 @@ +/* + * linux/drivers/mmc/mmc_ops.h + * + * Copyright 2006-2007 Pierre Ossman + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or (at + * your option) any later version. + */ + +#ifndef _MMC_MMC_OPS_H +#define _MMC_MMC_OPS_H + +int mmc_select_card(struct mmc_card *card); +int mmc_deselect_cards(struct mmc_host *host); +int mmc_go_idle(struct mmc_host *host); +int mmc_send_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr); +int mmc_all_send_cid(struct mmc_host *host, u32 *cid); +int mmc_set_relative_addr(struct mmc_card *card); +int mmc_send_csd(struct mmc_card *card, u32 *csd); +int mmc_send_ext_csd(struct mmc_card *card, u8 *ext_csd); +int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value); +int mmc_send_status(struct mmc_card *card, u32 *status); + +#endif + diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c new file mode 100644 index 00000000000..c1dfd03d559 --- /dev/null +++ b/drivers/mmc/core/sd.c @@ -0,0 +1,587 @@ +/* + * linux/drivers/mmc/sd.c + * + * Copyright (C) 2003-2004 Russell King, All Rights Reserved. + * SD support Copyright (C) 2004 Ian Molton, All Rights Reserved. + * Copyright (C) 2005-2007 Pierre Ossman, All Rights Reserved. + * + * 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. + */ + +#include <linux/err.h> + +#include <linux/mmc/host.h> +#include <linux/mmc/card.h> +#include <linux/mmc/mmc.h> + +#include "core.h" +#include "sysfs.h" +#include "mmc_ops.h" +#include "sd_ops.h" + +#include "core.h" + +static const unsigned int tran_exp[] = { + 10000, 100000, 1000000, 10000000, + 0, 0, 0, 0 +}; + +static const unsigned char tran_mant[] = { + 0, 10, 12, 13, 15, 20, 25, 30, + 35, 40, 45, 50, 55, 60, 70, 80, +}; + +static const unsigned int tacc_exp[] = { + 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, +}; + +static const unsigned int tacc_mant[] = { + 0, 10, 12, 13, 15, 20, 25, 30, + 35, 40, 45, 50, 55, 60, 70, 80, +}; + +#define UNSTUFF_BITS(resp,start,size) \ + ({ \ + const int __size = size; \ + const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \ + const int __off = 3 - ((start) / 32); \ + const int __shft = (start) & 31; \ + u32 __res; \ + \ + __res = resp[__off] >> __shft; \ + if (__size + __shft > 32) \ + __res |= resp[__off-1] << ((32 - __shft) % 32); \ + __res & __mask; \ + }) + +/* + * Given the decoded CSD structure, decode the raw CID to our CID structure. + */ +static void mmc_decode_cid(struct mmc_card *card) +{ + u32 *resp = card->raw_cid; + + memset(&card->cid, 0, sizeof(struct mmc_cid)); + + /* + * SD doesn't currently have a version field so we will + * have to assume we can parse this. + */ + card->cid.manfid = UNSTUFF_BITS(resp, 120, 8); + card->cid.oemid = UNSTUFF_BITS(resp, 104, 16); + card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8); + card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8); + card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8); + card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8); + card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8); + card->cid.hwrev = UNSTUFF_BITS(resp, 60, 4); + card->cid.fwrev = UNSTUFF_BITS(resp, 56, 4); + card->cid.serial = UNSTUFF_BITS(resp, 24, 32); + card->cid.year = UNSTUFF_BITS(resp, 12, 8); + card->cid.month = UNSTUFF_BITS(resp, 8, 4); + + card->cid.year += 2000; /* SD cards year offset */ +} + +/* + * Given a 128-bit response, decode to our card CSD structure. + */ +static int mmc_decode_csd(struct mmc_card *card) +{ + struct mmc_csd *csd = &card->csd; + unsigned int e, m, csd_struct; + u32 *resp = card->raw_csd; + + csd_struct = UNSTUFF_BITS(resp, 126, 2); + + switch (csd_struct) { + case 0: + m = UNSTUFF_BITS(resp, 115, 4); + e = UNSTUFF_BITS(resp, 112, 3); + csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10; + csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100; + + m = UNSTUFF_BITS(resp, 99, 4); + e = UNSTUFF_BITS(resp, 96, 3); + csd->max_dtr = tran_exp[e] * tran_mant[m]; + csd->cmdclass = UNSTUFF_BITS(resp, 84, 12); + + e = UNSTUFF_BITS(resp, 47, 3); + m = UNSTUFF_BITS(resp, 62, 12); + csd->capacity = (1 + m) << (e + 2); + + csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4); + csd->read_partial = UNSTUFF_BITS(resp, 79, 1); + csd->write_misalign = UNSTUFF_BITS(resp, 78, 1); + csd->read_misalign = UNSTUFF_BITS(resp, 77, 1); + csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3); + csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4); + csd->write_partial = UNSTUFF_BITS(resp, 21, 1); + break; + case 1: + /* + * This is a block-addressed SDHC card. Most + * interesting fields are unused and have fixed + * values. To avoid getting tripped by buggy cards, + * we assume those fixed values ourselves. + */ + mmc_card_set_blockaddr(card); + + csd->tacc_ns = 0; /* Unused */ + csd->tacc_clks = 0; /* Unused */ + + m = UNSTUFF_BITS(resp, 99, 4); + e = UNSTUFF_BITS(resp, 96, 3); + csd->max_dtr = tran_exp[e] * tran_mant[m]; + csd->cmdclass = UNSTUFF_BITS(resp, 84, 12); + + m = UNSTUFF_BITS(resp, 48, 22); + csd->capacity = (1 + m) << 10; + + csd->read_blkbits = 9; + csd->read_partial = 0; + csd->write_misalign = 0; + csd->read_misalign = 0; + csd->r2w_factor = 4; /* Unused */ + csd->write_blkbits = 9; + csd->write_partial = 0; + break; + default: + printk("%s: unrecognised CSD structure version %d\n", + mmc_hostname(card->host), csd_struct); + return -EINVAL; + } + + return 0; +} + +/* + * Given a 64-bit response, decode to our card SCR structure. + */ +static int mmc_decode_scr(struct mmc_card *card) +{ + struct sd_scr *scr = &card->scr; + unsigned int scr_struct; + u32 resp[4]; + + BUG_ON(!mmc_card_sd(card)); + + resp[3] = card->raw_scr[1]; + resp[2] = card->raw_scr[0]; + + scr_struct = UNSTUFF_BITS(resp, 60, 4); + if (scr_struct != 0) { + printk("%s: unrecognised SCR structure version %d\n", + mmc_hostname(card->host), scr_struct); + return -EINVAL; + } + + scr->sda_vsn = UNSTUFF_BITS(resp, 56, 4); + scr->bus_widths = UNSTUFF_BITS(resp, 48, 4); + + return 0; +} + +/* + * Fetches and decodes switch information + */ +static int mmc_read_switch(struct mmc_card *card) +{ + int err; + u8 *status; + + err = MMC_ERR_FAILED; + + status = kmalloc(64, GFP_KERNEL); + if (!status) { + printk("%s: could not allocate a buffer for switch " + "capabilities.\n", + mmc_hostname(card->host)); + return err; + } + + err = mmc_sd_switch(card, 0, 0, 1, status); + if (err != MMC_ERR_NONE) { + /* + * Card not supporting high-speed will ignore the + * command. + */ + err = MMC_ERR_NONE; + goto out; + } + + if (status[13] & 0x02) + card->sw_caps.hs_max_dtr = 50000000; + +out: + kfree(status); + + return err; +} + +/* + * Test if the card supports high-speed mode and, if so, switch to it. + */ +static int mmc_switch_hs(struct mmc_card *card) +{ + int err; + u8 *status; + + if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED)) + return MMC_ERR_NONE; + + if (card->sw_caps.hs_max_dtr == 0) + return MMC_ERR_NONE; + + err = MMC_ERR_FAILED; + + status = kmalloc(64, GFP_KERNEL); + if (!status) { + printk("%s: could not allocate a buffer for switch " + "capabilities.\n", + mmc_hostname(card->host)); + return err; + } + + err = mmc_sd_switch(card, 1, 0, 1, status); + if (err != MMC_ERR_NONE) + goto out; + + if ((status[16] & 0xF) != 1) { + printk(KERN_WARNING "%s: Problem switching card " + "into high-speed mode!\n", + mmc_hostname(card->host)); + } else { + mmc_card_set_highspeed(card); + mmc_set_timing(card->host, MMC_TIMING_SD_HS); + } + +out: + kfree(status); + + return err; +} + +/* + * Handle the detection and initialisation of a card. + * + * In the case of a resume, "curcard" will contain the card + * we're trying to reinitialise. + */ +static int mmc_sd_init_card(struct mmc_host *host, u32 ocr, + struct mmc_card *oldcard) +{ + struct mmc_card *card; + int err; + u32 cid[4]; + unsigned int max_dtr; + + BUG_ON(!host); + BUG_ON(!host->claimed); + + /* + * Since we're changing the OCR value, we seem to + * need to tell some cards to go back to the idle + * state. We wait 1ms to give cards time to + * respond. + */ + mmc_go_idle(host); + + /* + * If SD_SEND_IF_COND indicates an SD 2.0 + * compliant card and we should set bit 30 + * of the ocr to indicate that we can handle + * block-addressed SDHC cards. + */ + err = mmc_send_if_cond(host, ocr); + if (err == MMC_ERR_NONE) + ocr |= 1 << 30; + + err = mmc_send_app_op_cond(host, ocr, NULL); + if (err != MMC_ERR_NONE) + goto err; + + /* + * Fetch CID from card. + */ + err = mmc_all_send_cid(host, cid); + if (err != MMC_ERR_NONE) + goto err; + + if (oldcard) { + if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) + goto err; + + card = oldcard; + } else { + /* + * Allocate card structure. + */ + card = mmc_alloc_card(host); + if (IS_ERR(card)) + goto err; + + card->type = MMC_TYPE_SD; + memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); + } + + /* + * Set card RCA. + */ + err = mmc_send_relative_addr(host, &card->rca); + if (err != MMC_ERR_NONE) + goto free_card; + + mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL); + + if (!oldcard) { + /* + * Fetch CSD from card. + */ + err = mmc_send_csd(card, card->raw_csd); + if (err != MMC_ERR_NONE) + goto free_card; + + err = mmc_decode_csd(card); + if (err < 0) + goto free_card; + + mmc_decode_cid(card); + } + + /* + * Select card, as all following commands rely on that. + */ + err = mmc_select_card(card); + if (err != MMC_ERR_NONE) + goto free_card; + + if (!oldcard) { + /* + * Fetch SCR from card. + */ + err = mmc_app_send_scr(card, card->raw_scr); + if (err != MMC_ERR_NONE) + goto free_card; + + err = mmc_decode_scr(card); + if (err < 0) + goto free_card; + + /* + * Fetch switch information from card. + */ + err = mmc_read_switch(card); + if (err != MMC_ERR_NONE) + goto free_card; + } + + /* + * Attempt to change to high-speed (if supported) + */ + err = mmc_switch_hs(card); + if (err != MMC_ERR_NONE) + goto free_card; + + /* + * Compute bus speed. + */ + max_dtr = (unsigned int)-1; + + if (mmc_card_highspeed(card)) { + if (max_dtr > card->sw_caps.hs_max_dtr) + max_dtr = card->sw_caps.hs_max_dtr; + } else if (max_dtr > card->csd.max_dtr) { + max_dtr = card->csd.max_dtr; + } + + mmc_set_clock(host, max_dtr); + + /* + * Switch to wider bus (if supported). + */ + if ((host->caps && MMC_CAP_4_BIT_DATA) && + (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) { + err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4); + if (err != MMC_ERR_NONE) + goto free_card; + + mmc_set_bus_width(host, MMC_BUS_WIDTH_4); + } + + if (!oldcard) + host->card = card; + + return MMC_ERR_NONE; + +free_card: + if (!oldcard) + mmc_remove_card(card); +err: + + return MMC_ERR_FAILED; +} + +/* + * Host is being removed. Free up the current card. + */ +static void mmc_sd_remove(struct mmc_host *host) +{ + BUG_ON(!host); + BUG_ON(!host->card); + + mmc_remove_card(host->card); + host->card = NULL; +} + +/* + * Card detection callback from host. + */ +static void mmc_sd_detect(struct mmc_host *host) +{ + int err; + + BUG_ON(!host); + BUG_ON(!host->card); + + mmc_claim_host(host); + + /* + * Just check if our card has been removed. + */ + err = mmc_send_status(host->card, NULL); + + mmc_release_host(host); + + if (err != MMC_ERR_NONE) { + mmc_remove_card(host->card); + host->card = NULL; + + mmc_claim_host(host); + mmc_detach_bus(host); + mmc_release_host(host); + } +} + +#ifdef CONFIG_MMC_UNSAFE_RESUME + +/* + * Suspend callback from host. + */ +static void mmc_sd_suspend(struct mmc_host *host) +{ + BUG_ON(!host); + BUG_ON(!host->card); + + mmc_claim_host(host); + mmc_deselect_cards(host); + host->card->state &= ~MMC_STATE_HIGHSPEED; + mmc_release_host(host); +} + +/* + * Resume callback from host. + * + * This function tries to determine if the same card is still present + * and, if so, restore all state to it. + */ +static void mmc_sd_resume(struct mmc_host *host) +{ + int err; + + BUG_ON(!host); + BUG_ON(!host->card); + + mmc_claim_host(host); + + err = mmc_sd_init_card(host, host->ocr, host->card); + if (err != MMC_ERR_NONE) { + mmc_remove_card(host->card); + host->card = NULL; + + mmc_detach_bus(host); + } + + mmc_release_host(host); +} + +#else + +#define mmc_sd_suspend NULL +#define mmc_sd_resume NULL + +#endif + +static const struct mmc_bus_ops mmc_sd_ops = { + .remove = mmc_sd_remove, + .detect = mmc_sd_detect, + .suspend = mmc_sd_suspend, + .resume = mmc_sd_resume, +}; + +/* + * Starting point for SD card init. + */ +int mmc_attach_sd(struct mmc_host *host, u32 ocr) +{ + int err; + + BUG_ON(!host); + BUG_ON(!host->claimed); + + mmc_attach_bus(host, &mmc_sd_ops); + + /* + * Sanity check the voltages that the card claims to + * support. + */ + if (ocr & 0x7F) { + printk(KERN_WARNING "%s: card claims to support voltages " + "below the defined range. These will be ignored.\n", + mmc_hostname(host)); + ocr &= ~0x7F; + } + + if (ocr & MMC_VDD_165_195) { + printk(KERN_WARNING "%s: SD card claims to support the " + "incompletely defined 'low voltage range'. This " + "will be ignored.\n", mmc_hostname(host)); + ocr &= ~MMC_VDD_165_195; + } + + host->ocr = mmc_select_voltage(host, ocr); + + /* + * Can we support the voltage(s) of the card(s)? + */ + if (!host->ocr) + goto err; + + /* + * Detect and init the card. + */ + err = mmc_sd_init_card(host, host->ocr, NULL); + if (err != MMC_ERR_NONE) + goto err; + + mmc_release_host(host); + + err = mmc_register_card(host->card); + if (err) + goto reclaim_host; + + return 0; + +reclaim_host: + mmc_claim_host(host); + mmc_remove_card(host->card); + host->card = NULL; +err: + mmc_detach_bus(host); + mmc_release_host(host); + + return 0; +} + diff --git a/drivers/mmc/core/sd_ops.c b/drivers/mmc/core/sd_ops.c new file mode 100644 index 00000000000..9697ce58110 --- /dev/null +++ b/drivers/mmc/core/sd_ops.c @@ -0,0 +1,316 @@ +/* + * linux/drivers/mmc/sd_ops.h + * + * Copyright 2006-2007 Pierre Ossman + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or (at + * your option) any later version. + */ + +#include <linux/types.h> +#include <asm/scatterlist.h> +#include <linux/scatterlist.h> + +#include <linux/mmc/host.h> +#include <linux/mmc/card.h> +#include <linux/mmc/mmc.h> +#include <linux/mmc/sd.h> + +#include "core.h" +#include "sd_ops.h" + +/** + * mmc_wait_for_app_cmd - start an application command and wait for + completion + * @host: MMC host to start command + * @rca: RCA to send MMC_APP_CMD to + * @cmd: MMC command to start + * @retries: maximum number of retries + * + * Sends a MMC_APP_CMD, checks the card response, sends the command + * in the parameter and waits for it to complete. Return any error + * that occurred while the command was executing. Do not attempt to + * parse the response. + */ +int mmc_wait_for_app_cmd(struct mmc_host *host, struct mmc_card *card, + struct mmc_command *cmd, int retries) +{ + struct mmc_request mrq; + + int i, err; + + BUG_ON(!cmd); + BUG_ON(retries < 0); + + err = MMC_ERR_INVALID; + + /* + * We have to resend MMC_APP_CMD for each attempt so + * we cannot use the retries field in mmc_command. + */ + for (i = 0;i <= retries;i++) { + memset(&mrq, 0, sizeof(struct mmc_request)); + + err = mmc_app_cmd(host, card); + if (err != MMC_ERR_NONE) + continue; + + memset(&mrq, 0, sizeof(struct mmc_request)); + + memset(cmd->resp, 0, sizeof(cmd->resp)); + cmd->retries = 0; + + mrq.cmd = cmd; + cmd->data = NULL; + + mmc_wait_for_req(host, &mrq); + + err = cmd->error; + if (cmd->error == MMC_ERR_NONE) + break; + } + + return err; +} + +EXPORT_SYMBOL(mmc_wait_for_app_cmd); + +int mmc_app_cmd(struct mmc_host *host, struct mmc_card *card) +{ + int err; + struct mmc_command cmd; + + BUG_ON(!host); + BUG_ON(card && (card->host != host)); + + cmd.opcode = MMC_APP_CMD; + + if (card) { + cmd.arg = card->rca << 16; + cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; + } else { + cmd.arg = 0; + cmd.flags = MMC_RSP_R1 | MMC_CMD_BCR; + } + + err = mmc_wait_for_cmd(host, &cmd, 0); + if (err != MMC_ERR_NONE) + return err; + + /* Check that card supported application commands */ + if (!(cmd.resp[0] & R1_APP_CMD)) + return MMC_ERR_FAILED; + + return MMC_ERR_NONE; +} + +int mmc_app_set_bus_width(struct mmc_card *card, int width) +{ + int err; + struct mmc_command cmd; + + BUG_ON(!card); + BUG_ON(!card->host); + + memset(&cmd, 0, sizeof(struct mmc_command)); + + cmd.opcode = SD_APP_SET_BUS_WIDTH; + cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; + + switch (width) { + case MMC_BUS_WIDTH_1: + cmd.arg = SD_BUS_WIDTH_1; + break; + case MMC_BUS_WIDTH_4: + cmd.arg = SD_BUS_WIDTH_4; + break; + default: + return MMC_ERR_INVALID; + } + + err = mmc_wait_for_app_cmd(card->host, card, &cmd, MMC_CMD_RETRIES); + if (err != MMC_ERR_NONE) + return err; + + return MMC_ERR_NONE; +} + +int mmc_send_app_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr) +{ + struct mmc_command cmd; + int i, err = 0; + + BUG_ON(!host); + + memset(&cmd, 0, sizeof(struct mmc_command)); + + cmd.opcode = SD_APP_OP_COND; + cmd.arg = ocr; + cmd.flags = MMC_RSP_R3 | MMC_CMD_BCR; + + for (i = 100; i; i--) { + err = mmc_wait_for_app_cmd(host, NULL, &cmd, MMC_CMD_RETRIES); + if (err != MMC_ERR_NONE) + break; + + if (cmd.resp[0] & MMC_CARD_BUSY || ocr == 0) + break; + + err = MMC_ERR_TIMEOUT; + + mmc_delay(10); + } + + if (rocr) + *rocr = cmd.resp[0]; + + return err; +} + +int mmc_send_if_cond(struct mmc_host *host, u32 ocr) +{ + struct mmc_command cmd; + int err; + static const u8 test_pattern = 0xAA; + + /* + * To support SD 2.0 cards, we must always invoke SD_SEND_IF_COND + * before SD_APP_OP_COND. This command will harmlessly fail for + * SD 1.0 cards. + */ + cmd.opcode = SD_SEND_IF_COND; + cmd.arg = ((ocr & 0xFF8000) != 0) << 8 | test_pattern; + cmd.flags = MMC_RSP_R7 | MMC_CMD_BCR; + + err = mmc_wait_for_cmd(host, &cmd, 0); + if (err != MMC_ERR_NONE) + return err; + + if ((cmd.resp[0] & 0xFF) != test_pattern) + return MMC_ERR_FAILED; + + return MMC_ERR_NONE; +} + +int mmc_send_relative_addr(struct mmc_host *host, unsigned int *rca) +{ + int err; + struct mmc_command cmd; + + BUG_ON(!host); + BUG_ON(!rca); + + memset(&cmd, 0, sizeof(struct mmc_command)); + + cmd.opcode = SD_SEND_RELATIVE_ADDR; + cmd.arg = 0; + cmd.flags = MMC_RSP_R6 | MMC_CMD_BCR; + + err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES); + if (err != MMC_ERR_NONE) + return err; + + *rca = cmd.resp[0] >> 16; + + return MMC_ERR_NONE; +} + +int mmc_app_send_scr(struct mmc_card *card, u32 *scr) +{ + int err; + struct mmc_request mrq; + struct mmc_command cmd; + struct mmc_data data; + struct scatterlist sg; + + BUG_ON(!card); + BUG_ON(!card->host); + BUG_ON(!scr); + + err = mmc_app_cmd(card->host, card); + if (err != MMC_ERR_NONE) + return err; + + memset(&mrq, 0, sizeof(struct mmc_request)); + memset(&cmd, 0, sizeof(struct mmc_command)); + memset(&data, 0, sizeof(struct mmc_data)); + + mrq.cmd = &cmd; + mrq.data = &data; + + cmd.opcode = SD_APP_SEND_SCR; + cmd.arg = 0; + cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; + + data.blksz = 8; + data.blocks = 1; + data.flags = MMC_DATA_READ; + data.sg = &sg; + data.sg_len = 1; + + sg_init_one(&sg, scr, 8); + + mmc_set_data_timeout(&data, card, 0); + + mmc_wait_for_req(card->host, &mrq); + + if (cmd.error != MMC_ERR_NONE) + return cmd.error; + if (data.error != MMC_ERR_NONE) + return data.error; + + scr[0] = ntohl(scr[0]); + scr[1] = ntohl(scr[1]); + + return MMC_ERR_NONE; +} + +int mmc_sd_switch(struct mmc_card *card, int mode, int group, + u8 value, u8 *resp) +{ + struct mmc_request mrq; + struct mmc_command cmd; + struct mmc_data data; + struct scatterlist sg; + + BUG_ON(!card); + BUG_ON(!card->host); + + mode = !!mode; + value &= 0xF; + + memset(&mrq, 0, sizeof(struct mmc_request)); + memset(&cmd, 0, sizeof(struct mmc_command)); + memset(&data, 0, sizeof(struct mmc_data)); + + mrq.cmd = &cmd; + mrq.data = &data; + + cmd.opcode = SD_SWITCH; + cmd.arg = mode << 31 | 0x00FFFFFF; + cmd.arg &= ~(0xF << (group * 4)); + cmd.arg |= value << (group * 4); + cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; + + data.blksz = 64; + data.blocks = 1; + data.flags = MMC_DATA_READ; + data.sg = &sg; + data.sg_len = 1; + + sg_init_one(&sg, resp, 64); + + mmc_set_data_timeout(&data, card, 0); + + mmc_wait_for_req(card->host, &mrq); + + if (cmd.error != MMC_ERR_NONE) + return cmd.error; + if (data.error != MMC_ERR_NONE) + return data.error; + + return MMC_ERR_NONE; +} + diff --git a/drivers/mmc/core/sd_ops.h b/drivers/mmc/core/sd_ops.h new file mode 100644 index 00000000000..1240fddba5e --- /dev/null +++ b/drivers/mmc/core/sd_ops.h @@ -0,0 +1,25 @@ +/* + * linux/drivers/mmc/sd_ops.h + * + * Copyright 2006-2007 Pierre Ossman + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or (at + * your option) any later version. + */ + +#ifndef _MMC_SD_OPS_H +#define _MMC_SD_OPS_H + +int mmc_app_cmd(struct mmc_host *host, struct mmc_card *card); +int mmc_app_set_bus_width(struct mmc_card *card, int width); +int mmc_send_app_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr); +int mmc_send_if_cond(struct mmc_host *host, u32 ocr); +int mmc_send_relative_addr(struct mmc_host *host, unsigned int *rca); +int mmc_app_send_scr(struct mmc_card *card, u32 *scr); +int mmc_sd_switch(struct mmc_card *card, int mode, int group, + u8 value, u8 *resp); + +#endif + diff --git a/drivers/mmc/mmc_sysfs.c b/drivers/mmc/core/sysfs.c index e0e82d849d5..843b1fbba55 100644 --- a/drivers/mmc/mmc_sysfs.c +++ b/drivers/mmc/core/sysfs.c @@ -1,5 +1,5 @@ /* - * linux/drivers/mmc/mmc_sysfs.c + * linux/drivers/mmc/core/sysfs.c * * Copyright (C) 2003 Russell King, All Rights Reserved. * @@ -18,7 +18,7 @@ #include <linux/mmc/card.h> #include <linux/mmc/host.h> -#include "mmc.h" +#include "sysfs.h" #define dev_to_mmc_card(d) container_of(d, struct mmc_card, dev) #define to_mmc_driver(d) container_of(d, struct mmc_driver, drv) @@ -72,12 +72,11 @@ static void mmc_release_card(struct device *dev) /* * This currently matches any MMC driver to any MMC card - drivers * themselves make the decision whether to drive this card in their - * probe method. However, we force "bad" cards to fail. + * probe method. */ static int mmc_bus_match(struct device *dev, struct device_driver *drv) { - struct mmc_card *card = dev_to_mmc_card(dev); - return !mmc_card_bad(card); + return 1; } static int @@ -217,6 +216,8 @@ int mmc_register_card(struct mmc_card *card) device_del(&card->dev); } } + if (ret == 0) + mmc_card_set_present(card); return ret; } diff --git a/drivers/mmc/mmc.h b/drivers/mmc/core/sysfs.h index 149affe0b68..80e29b35828 100644 --- a/drivers/mmc/mmc.h +++ b/drivers/mmc/core/sysfs.h @@ -1,15 +1,16 @@ /* - * linux/drivers/mmc/mmc.h + * linux/drivers/mmc/core/sysfs.h * * Copyright (C) 2003 Russell King, All Rights Reserved. + * Copyright 2007 Pierre Ossman * * 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. */ -#ifndef _MMC_H -#define _MMC_H -/* core-internal functions */ +#ifndef _MMC_CORE_SYSFS_H +#define _MMC_CORE_SYSFS_H + void mmc_init_card(struct mmc_card *card, struct mmc_host *host); int mmc_register_card(struct mmc_card *card); void mmc_remove_card(struct mmc_card *card); @@ -22,4 +23,5 @@ void mmc_free_host_sysfs(struct mmc_host *host); int mmc_schedule_work(struct work_struct *work); int mmc_schedule_delayed_work(struct delayed_work *work, unsigned long delay); void mmc_flush_scheduled_work(void); + #endif diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig new file mode 100644 index 00000000000..ed4deab2203 --- /dev/null +++ b/drivers/mmc/host/Kconfig @@ -0,0 +1,103 @@ +# +# MMC/SD host controller drivers +# + +comment "MMC/SD Host Controller Drivers" + depends on MMC + +config MMC_ARMMMCI + tristate "ARM AMBA Multimedia Card Interface support" + depends on ARM_AMBA && MMC + help + This selects the ARM(R) AMBA(R) PrimeCell Multimedia Card + Interface (PL180 and PL181) support. If you have an ARM(R) + platform with a Multimedia Card slot, say Y or M here. + + If unsure, say N. + +config MMC_PXA + tristate "Intel PXA25x/26x/27x Multimedia Card Interface support" + depends on ARCH_PXA && MMC + help + This selects the Intel(R) PXA(R) Multimedia card Interface. + If you have a PXA(R) platform with a Multimedia Card slot, + say Y or M here. + + If unsure, say N. + +config MMC_SDHCI + tristate "Secure Digital Host Controller Interface support (EXPERIMENTAL)" + depends on PCI && MMC && EXPERIMENTAL + help + This select the generic Secure Digital Host Controller Interface. + It is used by manufacturers such as Texas Instruments(R), Ricoh(R) + and Toshiba(R). Most controllers found in laptops are of this type. + If you have a controller with this interface, say Y or M here. + + If unsure, say N. + +config MMC_OMAP + tristate "TI OMAP Multimedia Card Interface support" + depends on ARCH_OMAP && MMC + select TPS65010 if MACH_OMAP_H2 + help + This selects the TI OMAP Multimedia card Interface. + If you have an OMAP board with a Multimedia Card slot, + say Y or M here. + + If unsure, say N. + +config MMC_WBSD + tristate "Winbond W83L51xD SD/MMC Card Interface support" + depends on MMC && ISA_DMA_API + help + This selects the Winbond(R) W83L51xD Secure digital and + Multimedia card Interface. + If you have a machine with a integrated W83L518D or W83L519D + SD/MMC card reader, say Y or M here. + + If unsure, say N. + +config MMC_AU1X + tristate "Alchemy AU1XX0 MMC Card Interface support" + depends on MMC && SOC_AU1200 + help + This selects the AMD Alchemy(R) Multimedia card interface. + If you have a Alchemy platform with a MMC slot, say Y or M here. + + If unsure, say N. + +config MMC_AT91 + tristate "AT91 SD/MMC Card Interface support" + depends on ARCH_AT91 && MMC + help + This selects the AT91 MCI controller. + + If unsure, say N. + +config MMC_IMX + tristate "Motorola i.MX Multimedia Card Interface support" + depends on ARCH_IMX && MMC + help + This selects the Motorola i.MX Multimedia card Interface. + If you have a i.MX platform with a Multimedia Card slot, + say Y or M here. + + If unsure, say N. + +config MMC_TIFM_SD + tristate "TI Flash Media MMC/SD Interface support (EXPERIMENTAL)" + depends on MMC && EXPERIMENTAL && PCI + select TIFM_CORE + help + Say Y here if you want to be able to access MMC/SD cards with + the Texas Instruments(R) Flash Media card reader, found in many + laptops. + This option 'selects' (turns on, enables) 'TIFM_CORE', but you + probably also need appropriate card reader host adapter, such as + 'Misc devices: TI Flash Media PCI74xx/PCI76xx host adapter support + (TIFM_7XX1)'. + + To compile this driver as a module, choose M here: the + module will be called tifm_sd. + diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile new file mode 100644 index 00000000000..6685f64345b --- /dev/null +++ b/drivers/mmc/host/Makefile @@ -0,0 +1,18 @@ +# +# Makefile for MMC/SD host controller drivers +# + +ifeq ($(CONFIG_MMC_DEBUG),y) + EXTRA_CFLAGS += -DDEBUG +endif + +obj-$(CONFIG_MMC_ARMMMCI) += mmci.o +obj-$(CONFIG_MMC_PXA) += pxamci.o +obj-$(CONFIG_MMC_IMX) += imxmmc.o +obj-$(CONFIG_MMC_SDHCI) += sdhci.o +obj-$(CONFIG_MMC_WBSD) += wbsd.o +obj-$(CONFIG_MMC_AU1X) += au1xmmc.o +obj-$(CONFIG_MMC_OMAP) += omap.o +obj-$(CONFIG_MMC_AT91) += at91_mci.o +obj-$(CONFIG_MMC_TIFM_SD) += tifm_sd.o + diff --git a/drivers/mmc/at91_mci.c b/drivers/mmc/host/at91_mci.c index 459f4b4fede..e37943c314c 100644 --- a/drivers/mmc/at91_mci.c +++ b/drivers/mmc/host/at91_mci.c @@ -67,7 +67,6 @@ #include <linux/atmel_pdc.h> #include <linux/mmc/host.h> -#include <linux/mmc/protocol.h> #include <asm/io.h> #include <asm/irq.h> diff --git a/drivers/mmc/au1xmmc.c b/drivers/mmc/host/au1xmmc.c index b834be261ab..b7156a4555b 100644 --- a/drivers/mmc/au1xmmc.c +++ b/drivers/mmc/host/au1xmmc.c @@ -42,7 +42,6 @@ #include <linux/dma-mapping.h> #include <linux/mmc/host.h> -#include <linux/mmc/protocol.h> #include <asm/io.h> #include <asm/mach-au1x00/au1000.h> #include <asm/mach-au1x00/au1xxx_dbdma.h> diff --git a/drivers/mmc/au1xmmc.h b/drivers/mmc/host/au1xmmc.h index 341cbdf0bac..341cbdf0bac 100644 --- a/drivers/mmc/au1xmmc.h +++ b/drivers/mmc/host/au1xmmc.h diff --git a/drivers/mmc/imxmmc.c b/drivers/mmc/host/imxmmc.c index 0de5c9e94e7..7ee2045acbe 100644 --- a/drivers/mmc/imxmmc.c +++ b/drivers/mmc/host/imxmmc.c @@ -41,7 +41,6 @@ #include <linux/dma-mapping.h> #include <linux/mmc/host.h> #include <linux/mmc/card.h> -#include <linux/mmc/protocol.h> #include <linux/delay.h> #include <asm/dma.h> diff --git a/drivers/mmc/imxmmc.h b/drivers/mmc/host/imxmmc.h index e5339e334db..e5339e334db 100644 --- a/drivers/mmc/imxmmc.h +++ b/drivers/mmc/host/imxmmc.h diff --git a/drivers/mmc/mmci.c b/drivers/mmc/host/mmci.c index 5941dd951e8..d11c2d23cee 100644 --- a/drivers/mmc/mmci.c +++ b/drivers/mmc/host/mmci.c @@ -17,7 +17,6 @@ #include <linux/err.h> #include <linux/highmem.h> #include <linux/mmc/host.h> -#include <linux/mmc/protocol.h> #include <linux/amba/bus.h> #include <linux/clk.h> diff --git a/drivers/mmc/mmci.h b/drivers/mmc/host/mmci.h index 6d7eadc9a67..6d7eadc9a67 100644 --- a/drivers/mmc/mmci.h +++ b/drivers/mmc/host/mmci.h diff --git a/drivers/mmc/omap.c b/drivers/mmc/host/omap.c index 1e96a2f6502..1914e65d4db 100644 --- a/drivers/mmc/omap.c +++ b/drivers/mmc/host/omap.c @@ -22,7 +22,6 @@ #include <linux/spinlock.h> #include <linux/timer.h> #include <linux/mmc/host.h> -#include <linux/mmc/protocol.h> #include <linux/mmc/card.h> #include <linux/clk.h> @@ -605,7 +604,7 @@ static void mmc_omap_switch_handler(struct work_struct *work) } if (mmc_omap_cover_is_open(host)) { if (!complained) { - dev_info(mmc_dev(host->mmc), "cover is open"); + dev_info(mmc_dev(host->mmc), "cover is open\n"); complained = 1; } if (mmc_omap_enable_poll) @@ -937,48 +936,55 @@ static void mmc_omap_power(struct mmc_omap_host *host, int on) } } -static void mmc_omap_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) +static int mmc_omap_calc_divisor(struct mmc_host *mmc, struct mmc_ios *ios) { struct mmc_omap_host *host = mmc_priv(mmc); + int func_clk_rate = clk_get_rate(host->fclk); int dsor; - int realclock, i; - - realclock = ios->clock; if (ios->clock == 0) - dsor = 0; - else { - int func_clk_rate = clk_get_rate(host->fclk); - - dsor = func_clk_rate / realclock; - if (dsor < 1) - dsor = 1; + return 0; - if (func_clk_rate / dsor > realclock) - dsor++; + dsor = func_clk_rate / ios->clock; + if (dsor < 1) + dsor = 1; - if (dsor > 250) - dsor = 250; + if (func_clk_rate / dsor > ios->clock) dsor++; - if (ios->bus_width == MMC_BUS_WIDTH_4) - dsor |= 1 << 15; - } + if (dsor > 250) + dsor = 250; + dsor++; + + if (ios->bus_width == MMC_BUS_WIDTH_4) + dsor |= 1 << 15; + + return dsor; +} + +static void mmc_omap_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) +{ + struct mmc_omap_host *host = mmc_priv(mmc); + int dsor; + int i; + + dsor = mmc_omap_calc_divisor(mmc, ios); + host->bus_mode = ios->bus_mode; + host->hw_bus_mode = host->bus_mode; switch (ios->power_mode) { case MMC_POWER_OFF: mmc_omap_power(host, 0); break; case MMC_POWER_UP: - case MMC_POWER_ON: + /* Cannot touch dsor yet, just power up MMC */ mmc_omap_power(host, 1); + return; + case MMC_POWER_ON: dsor |= 1 << 11; break; } - host->bus_mode = ios->bus_mode; - host->hw_bus_mode = host->bus_mode; - clk_enable(host->fclk); /* On insanely high arm_per frequencies something sometimes @@ -987,7 +993,7 @@ static void mmc_omap_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) * Writing to the CON register twice seems to do the trick. */ for (i = 0; i < 2; i++) OMAP_MMC_WRITE(host, CON, dsor); - if (ios->power_mode == MMC_POWER_UP) { + if (ios->power_mode == MMC_POWER_ON) { /* Send clock cycles, poll completion */ OMAP_MMC_WRITE(host, IE, 0); OMAP_MMC_WRITE(host, STAT, 0xffff); diff --git a/drivers/mmc/pxamci.c b/drivers/mmc/host/pxamci.c index 9774fc68b61..a98ff98fa56 100644 --- a/drivers/mmc/pxamci.c +++ b/drivers/mmc/host/pxamci.c @@ -24,7 +24,6 @@ #include <linux/interrupt.h> #include <linux/dma-mapping.h> #include <linux/mmc/host.h> -#include <linux/mmc/protocol.h> #include <asm/dma.h> #include <asm/io.h> diff --git a/drivers/mmc/pxamci.h b/drivers/mmc/host/pxamci.h index 1b163220df2..1b163220df2 100644 --- a/drivers/mmc/pxamci.h +++ b/drivers/mmc/host/pxamci.h diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/host/sdhci.c index d749f08601b..ff5bf73cdd2 100644 --- a/drivers/mmc/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -1,7 +1,7 @@ /* * linux/drivers/mmc/sdhci.c - Secure Digital Host Controller Interface driver * - * Copyright (C) 2005-2006 Pierre Ossman, All Rights Reserved. + * Copyright (C) 2005-2007 Pierre Ossman, All Rights Reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -15,7 +15,6 @@ #include <linux/dma-mapping.h> #include <linux/mmc/host.h> -#include <linux/mmc/protocol.h> #include <asm/scatterlist.h> @@ -247,14 +246,13 @@ static void sdhci_read_block_pio(struct sdhci_host *host) chunk_remain = min(blksize, 4); } - size = min(host->size, host->remain); - size = min(size, chunk_remain); + size = min(host->remain, chunk_remain); chunk_remain -= size; blksize -= size; host->offset += size; host->remain -= size; - host->size -= size; + while (size) { *buffer = data & 0xFF; buffer++; @@ -289,14 +287,13 @@ static void sdhci_write_block_pio(struct sdhci_host *host) buffer = sdhci_sg_to_buffer(host) + host->offset; while (blksize) { - size = min(host->size, host->remain); - size = min(size, chunk_remain); + size = min(host->remain, chunk_remain); chunk_remain -= size; blksize -= size; host->offset += size; host->remain -= size; - host->size -= size; + while (size) { data >>= 8; data |= (u32)*buffer << 24; @@ -325,7 +322,7 @@ static void sdhci_transfer_pio(struct sdhci_host *host) BUG_ON(!host->data); - if (host->size == 0) + if (host->num_sg == 0) return; if (host->data->flags & MMC_DATA_READ) @@ -339,10 +336,8 @@ static void sdhci_transfer_pio(struct sdhci_host *host) else sdhci_write_block_pio(host); - if (host->size == 0) + if (host->num_sg == 0) break; - - BUG_ON(host->num_sg == 0); } DBG("PIO transfer complete.\n"); @@ -408,8 +403,6 @@ static void sdhci_prepare_data(struct sdhci_host *host, struct mmc_data *data) writel(sg_dma_address(data->sg), host->ioaddr + SDHCI_DMA_ADDRESS); } else { - host->size = data->blksz * data->blocks; - host->cur_sg = data->sg; host->num_sg = data->sg_len; @@ -473,10 +466,6 @@ static void sdhci_finish_data(struct sdhci_host *host) "though there were blocks left.\n", mmc_hostname(host->mmc)); data->error = MMC_ERR_FAILED; - } else if (host->size != 0) { - printk(KERN_ERR "%s: %d bytes were left untransferred.\n", - mmc_hostname(host->mmc), host->size); - data->error = MMC_ERR_FAILED; } DBG("Ending data transfer (%d bytes)\n", data->bytes_xfered); @@ -669,20 +658,16 @@ static void sdhci_set_power(struct sdhci_host *host, unsigned short power) pwr = SDHCI_POWER_ON; - switch (power) { - case MMC_VDD_170: - case MMC_VDD_180: - case MMC_VDD_190: + switch (1 << power) { + case MMC_VDD_165_195: pwr |= SDHCI_POWER_180; break; - case MMC_VDD_290: - case MMC_VDD_300: - case MMC_VDD_310: + case MMC_VDD_29_30: + case MMC_VDD_30_31: pwr |= SDHCI_POWER_300; break; - case MMC_VDD_320: - case MMC_VDD_330: - case MMC_VDD_340: + case MMC_VDD_32_33: + case MMC_VDD_33_34: pwr |= SDHCI_POWER_330; break; default: @@ -1294,7 +1279,7 @@ static int __devinit sdhci_probe_slot(struct pci_dev *pdev, int slot) if (caps & SDHCI_CAN_VDD_300) mmc->ocr_avail |= MMC_VDD_29_30|MMC_VDD_30_31; if (caps & SDHCI_CAN_VDD_180) - mmc->ocr_avail |= MMC_VDD_17_18|MMC_VDD_18_19; + mmc->ocr_avail |= MMC_VDD_165_195; if (mmc->ocr_avail == 0) { printk(KERN_ERR "%s: Hardware doesn't report any " diff --git a/drivers/mmc/sdhci.h b/drivers/mmc/host/sdhci.h index e324f0a623d..7400f4bc114 100644 --- a/drivers/mmc/sdhci.h +++ b/drivers/mmc/host/sdhci.h @@ -1,7 +1,7 @@ /* * linux/drivers/mmc/sdhci.h - Secure Digital Host Controller Interface driver * - * Copyright (C) 2005 Pierre Ossman, All Rights Reserved. + * Copyright (C) 2005-2007 Pierre Ossman, All Rights Reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -187,8 +187,6 @@ struct sdhci_host { int offset; /* Offset into current sg */ int remain; /* Bytes left in current */ - int size; /* Remaining bytes in transfer */ - char slot_descr[20]; /* Name for reservations */ int irq; /* Device IRQ */ diff --git a/drivers/mmc/host/tifm_sd.c b/drivers/mmc/host/tifm_sd.c new file mode 100644 index 00000000000..7511f961c67 --- /dev/null +++ b/drivers/mmc/host/tifm_sd.c @@ -0,0 +1,1102 @@ +/* + * tifm_sd.c - TI FlashMedia driver + * + * Copyright (C) 2006 Alex Dubov <oakad@yahoo.com> + * + * 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. + * + * Special thanks to Brad Campbell for extensive testing of this driver. + * + */ + + +#include <linux/tifm.h> +#include <linux/mmc/host.h> +#include <linux/highmem.h> +#include <linux/scatterlist.h> +#include <asm/io.h> + +#define DRIVER_NAME "tifm_sd" +#define DRIVER_VERSION "0.8" + +static int no_dma = 0; +static int fixed_timeout = 0; +module_param(no_dma, bool, 0644); +module_param(fixed_timeout, bool, 0644); + +/* Constants here are mostly from OMAP5912 datasheet */ +#define TIFM_MMCSD_RESET 0x0002 +#define TIFM_MMCSD_CLKMASK 0x03ff +#define TIFM_MMCSD_POWER 0x0800 +#define TIFM_MMCSD_4BBUS 0x8000 +#define TIFM_MMCSD_RXDE 0x8000 /* rx dma enable */ +#define TIFM_MMCSD_TXDE 0x0080 /* tx dma enable */ +#define TIFM_MMCSD_BUFINT 0x0c00 /* set bits: AE, AF */ +#define TIFM_MMCSD_DPE 0x0020 /* data timeout counted in kilocycles */ +#define TIFM_MMCSD_INAB 0x0080 /* abort / initialize command */ +#define TIFM_MMCSD_READ 0x8000 + +#define TIFM_MMCSD_ERRMASK 0x01e0 /* set bits: CCRC, CTO, DCRC, DTO */ +#define TIFM_MMCSD_EOC 0x0001 /* end of command phase */ +#define TIFM_MMCSD_CD 0x0002 /* card detect */ +#define TIFM_MMCSD_CB 0x0004 /* card enter busy state */ +#define TIFM_MMCSD_BRS 0x0008 /* block received/sent */ +#define TIFM_MMCSD_EOFB 0x0010 /* card exit busy state */ +#define TIFM_MMCSD_DTO 0x0020 /* data time-out */ +#define TIFM_MMCSD_DCRC 0x0040 /* data crc error */ +#define TIFM_MMCSD_CTO 0x0080 /* command time-out */ +#define TIFM_MMCSD_CCRC 0x0100 /* command crc error */ +#define TIFM_MMCSD_AF 0x0400 /* fifo almost full */ +#define TIFM_MMCSD_AE 0x0800 /* fifo almost empty */ +#define TIFM_MMCSD_OCRB 0x1000 /* OCR busy */ +#define TIFM_MMCSD_CIRQ 0x2000 /* card irq (cmd40/sdio) */ +#define TIFM_MMCSD_CERR 0x4000 /* card status error */ + +#define TIFM_MMCSD_ODTO 0x0040 /* open drain / extended timeout */ +#define TIFM_MMCSD_CARD_RO 0x0200 /* card is read-only */ + +#define TIFM_MMCSD_FIFO_SIZE 0x0020 + +#define TIFM_MMCSD_RSP_R0 0x0000 +#define TIFM_MMCSD_RSP_R1 0x0100 +#define TIFM_MMCSD_RSP_R2 0x0200 +#define TIFM_MMCSD_RSP_R3 0x0300 +#define TIFM_MMCSD_RSP_R4 0x0400 +#define TIFM_MMCSD_RSP_R5 0x0500 +#define TIFM_MMCSD_RSP_R6 0x0600 + +#define TIFM_MMCSD_RSP_BUSY 0x0800 + +#define TIFM_MMCSD_CMD_BC 0x0000 +#define TIFM_MMCSD_CMD_BCR 0x1000 +#define TIFM_MMCSD_CMD_AC 0x2000 +#define TIFM_MMCSD_CMD_ADTC 0x3000 + +#define TIFM_MMCSD_MAX_BLOCK_SIZE 0x0800UL + +enum { + CMD_READY = 0x0001, + FIFO_READY = 0x0002, + BRS_READY = 0x0004, + SCMD_ACTIVE = 0x0008, + SCMD_READY = 0x0010, + CARD_BUSY = 0x0020, + DATA_CARRY = 0x0040 +}; + +struct tifm_sd { + struct tifm_dev *dev; + + unsigned short eject:1, + open_drain:1, + no_dma:1; + unsigned short cmd_flags; + + unsigned int clk_freq; + unsigned int clk_div; + unsigned long timeout_jiffies; + + struct tasklet_struct finish_tasklet; + struct timer_list timer; + struct mmc_request *req; + + int sg_len; + int sg_pos; + unsigned int block_pos; + struct scatterlist bounce_buf; + unsigned char bounce_buf_data[TIFM_MMCSD_MAX_BLOCK_SIZE]; +}; + +/* for some reason, host won't respond correctly to readw/writew */ +static void tifm_sd_read_fifo(struct tifm_sd *host, struct page *pg, + unsigned int off, unsigned int cnt) +{ + struct tifm_dev *sock = host->dev; + unsigned char *buf; + unsigned int pos = 0, val; + + buf = kmap_atomic(pg, KM_BIO_DST_IRQ) + off; + if (host->cmd_flags & DATA_CARRY) { + buf[pos++] = host->bounce_buf_data[0]; + host->cmd_flags &= ~DATA_CARRY; + } + + while (pos < cnt) { + val = readl(sock->addr + SOCK_MMCSD_DATA); + buf[pos++] = val & 0xff; + if (pos == cnt) { + host->bounce_buf_data[0] = (val >> 8) & 0xff; + host->cmd_flags |= DATA_CARRY; + break; + } + buf[pos++] = (val >> 8) & 0xff; + } + kunmap_atomic(buf - off, KM_BIO_DST_IRQ); +} + +static void tifm_sd_write_fifo(struct tifm_sd *host, struct page *pg, + unsigned int off, unsigned int cnt) +{ + struct tifm_dev *sock = host->dev; + unsigned char *buf; + unsigned int pos = 0, val; + + buf = kmap_atomic(pg, KM_BIO_SRC_IRQ) + off; + if (host->cmd_flags & DATA_CARRY) { + val = host->bounce_buf_data[0] | ((buf[pos++] << 8) & 0xff00); + writel(val, sock->addr + SOCK_MMCSD_DATA); + host->cmd_flags &= ~DATA_CARRY; + } + + while (pos < cnt) { + val = buf[pos++]; + if (pos == cnt) { + host->bounce_buf_data[0] = val & 0xff; + host->cmd_flags |= DATA_CARRY; + break; + } + val |= (buf[pos++] << 8) & 0xff00; + writel(val, sock->addr + SOCK_MMCSD_DATA); + } + kunmap_atomic(buf - off, KM_BIO_SRC_IRQ); +} + +static void tifm_sd_transfer_data(struct tifm_sd *host) +{ + struct mmc_data *r_data = host->req->cmd->data; + struct scatterlist *sg = r_data->sg; + unsigned int off, cnt, t_size = TIFM_MMCSD_FIFO_SIZE * 2; + unsigned int p_off, p_cnt; + struct page *pg; + + if (host->sg_pos == host->sg_len) + return; + while (t_size) { + cnt = sg[host->sg_pos].length - host->block_pos; + if (!cnt) { + host->block_pos = 0; + host->sg_pos++; + if (host->sg_pos == host->sg_len) { + if ((r_data->flags & MMC_DATA_WRITE) + && DATA_CARRY) + writel(host->bounce_buf_data[0], + host->dev->addr + + SOCK_MMCSD_DATA); + + return; + } + cnt = sg[host->sg_pos].length; + } + off = sg[host->sg_pos].offset + host->block_pos; + + pg = nth_page(sg[host->sg_pos].page, off >> PAGE_SHIFT); + p_off = offset_in_page(off); + p_cnt = PAGE_SIZE - p_off; + p_cnt = min(p_cnt, cnt); + p_cnt = min(p_cnt, t_size); + + if (r_data->flags & MMC_DATA_READ) + tifm_sd_read_fifo(host, pg, p_off, p_cnt); + else if (r_data->flags & MMC_DATA_WRITE) + tifm_sd_write_fifo(host, pg, p_off, p_cnt); + + t_size -= p_cnt; + host->block_pos += p_cnt; + } +} + +static void tifm_sd_copy_page(struct page *dst, unsigned int dst_off, + struct page *src, unsigned int src_off, + unsigned int count) +{ + unsigned char *src_buf = kmap_atomic(src, KM_BIO_SRC_IRQ) + src_off; + unsigned char *dst_buf = kmap_atomic(dst, KM_BIO_DST_IRQ) + dst_off; + + memcpy(dst_buf, src_buf, count); + + kunmap_atomic(dst_buf - dst_off, KM_BIO_DST_IRQ); + kunmap_atomic(src_buf - src_off, KM_BIO_SRC_IRQ); +} + +static void tifm_sd_bounce_block(struct tifm_sd *host, struct mmc_data *r_data) +{ + struct scatterlist *sg = r_data->sg; + unsigned int t_size = r_data->blksz; + unsigned int off, cnt; + unsigned int p_off, p_cnt; + struct page *pg; + + dev_dbg(&host->dev->dev, "bouncing block\n"); + while (t_size) { + cnt = sg[host->sg_pos].length - host->block_pos; + if (!cnt) { + host->block_pos = 0; + host->sg_pos++; + if (host->sg_pos == host->sg_len) + return; + cnt = sg[host->sg_pos].length; + } + off = sg[host->sg_pos].offset + host->block_pos; + + pg = nth_page(sg[host->sg_pos].page, off >> PAGE_SHIFT); + p_off = offset_in_page(off); + p_cnt = PAGE_SIZE - p_off; + p_cnt = min(p_cnt, cnt); + p_cnt = min(p_cnt, t_size); + + if (r_data->flags & MMC_DATA_WRITE) + tifm_sd_copy_page(host->bounce_buf.page, + r_data->blksz - t_size, + pg, p_off, p_cnt); + else if (r_data->flags & MMC_DATA_READ) + tifm_sd_copy_page(pg, p_off, host->bounce_buf.page, + r_data->blksz - t_size, p_cnt); + + t_size -= p_cnt; + host->block_pos += p_cnt; + } +} + +static int tifm_sd_set_dma_data(struct tifm_sd *host, struct mmc_data *r_data) +{ + struct tifm_dev *sock = host->dev; + unsigned int t_size = TIFM_DMA_TSIZE * r_data->blksz; + unsigned int dma_len, dma_blk_cnt, dma_off; + struct scatterlist *sg = NULL; + unsigned long flags; + + if (host->sg_pos == host->sg_len) + return 1; + + if (host->cmd_flags & DATA_CARRY) { + host->cmd_flags &= ~DATA_CARRY; + local_irq_save(flags); + tifm_sd_bounce_block(host, r_data); + local_irq_restore(flags); + if (host->sg_pos == host->sg_len) + return 1; + } + + dma_len = sg_dma_len(&r_data->sg[host->sg_pos]) - host->block_pos; + if (!dma_len) { + host->block_pos = 0; + host->sg_pos++; + if (host->sg_pos == host->sg_len) + return 1; + dma_len = sg_dma_len(&r_data->sg[host->sg_pos]); + } + + if (dma_len < t_size) { + dma_blk_cnt = dma_len / r_data->blksz; + dma_off = host->block_pos; + host->block_pos += dma_blk_cnt * r_data->blksz; + } else { + dma_blk_cnt = TIFM_DMA_TSIZE; + dma_off = host->block_pos; + host->block_pos += t_size; + } + + if (dma_blk_cnt) + sg = &r_data->sg[host->sg_pos]; + else if (dma_len) { + if (r_data->flags & MMC_DATA_WRITE) { + local_irq_save(flags); + tifm_sd_bounce_block(host, r_data); + local_irq_restore(flags); + } else + host->cmd_flags |= DATA_CARRY; + + sg = &host->bounce_buf; + dma_off = 0; + dma_blk_cnt = 1; + } else + return 1; + + dev_dbg(&sock->dev, "setting dma for %d blocks\n", dma_blk_cnt); + writel(sg_dma_address(sg) + dma_off, sock->addr + SOCK_DMA_ADDRESS); + if (r_data->flags & MMC_DATA_WRITE) + writel((dma_blk_cnt << 8) | TIFM_DMA_TX | TIFM_DMA_EN, + sock->addr + SOCK_DMA_CONTROL); + else + writel((dma_blk_cnt << 8) | TIFM_DMA_EN, + sock->addr + SOCK_DMA_CONTROL); + + return 0; +} + +static unsigned int tifm_sd_op_flags(struct mmc_command *cmd) +{ + unsigned int rc = 0; + + switch (mmc_resp_type(cmd)) { + case MMC_RSP_NONE: + rc |= TIFM_MMCSD_RSP_R0; + break; + case MMC_RSP_R1B: + rc |= TIFM_MMCSD_RSP_BUSY; // deliberate fall-through + case MMC_RSP_R1: + rc |= TIFM_MMCSD_RSP_R1; + break; + case MMC_RSP_R2: + rc |= TIFM_MMCSD_RSP_R2; + break; + case MMC_RSP_R3: + rc |= TIFM_MMCSD_RSP_R3; + break; + default: + BUG(); + } + + switch (mmc_cmd_type(cmd)) { + case MMC_CMD_BC: + rc |= TIFM_MMCSD_CMD_BC; + break; + case MMC_CMD_BCR: + rc |= TIFM_MMCSD_CMD_BCR; + break; + case MMC_CMD_AC: + rc |= TIFM_MMCSD_CMD_AC; + break; + case MMC_CMD_ADTC: + rc |= TIFM_MMCSD_CMD_ADTC; + break; + default: + BUG(); + } + return rc; +} + +static void tifm_sd_exec(struct tifm_sd *host, struct mmc_command *cmd) +{ + struct tifm_dev *sock = host->dev; + unsigned int cmd_mask = tifm_sd_op_flags(cmd); + + if (host->open_drain) + cmd_mask |= TIFM_MMCSD_ODTO; + + if (cmd->data && (cmd->data->flags & MMC_DATA_READ)) + cmd_mask |= TIFM_MMCSD_READ; + + dev_dbg(&sock->dev, "executing opcode 0x%x, arg: 0x%x, mask: 0x%x\n", + cmd->opcode, cmd->arg, cmd_mask); + + writel((cmd->arg >> 16) & 0xffff, sock->addr + SOCK_MMCSD_ARG_HIGH); + writel(cmd->arg & 0xffff, sock->addr + SOCK_MMCSD_ARG_LOW); + writel(cmd->opcode | cmd_mask, sock->addr + SOCK_MMCSD_COMMAND); +} + +static void tifm_sd_fetch_resp(struct mmc_command *cmd, struct tifm_dev *sock) +{ + cmd->resp[0] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x1c) << 16) + | readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x18); + cmd->resp[1] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x14) << 16) + | readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x10); + cmd->resp[2] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x0c) << 16) + | readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x08); + cmd->resp[3] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x04) << 16) + | readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x00); +} + +static void tifm_sd_check_status(struct tifm_sd *host) +{ + struct tifm_dev *sock = host->dev; + struct mmc_command *cmd = host->req->cmd; + + if (cmd->error != MMC_ERR_NONE) + goto finish_request; + + if (!(host->cmd_flags & CMD_READY)) + return; + + if (cmd->data) { + if (cmd->data->error != MMC_ERR_NONE) { + if ((host->cmd_flags & SCMD_ACTIVE) + && !(host->cmd_flags & SCMD_READY)) + return; + + goto finish_request; + } + + if (!(host->cmd_flags & BRS_READY)) + return; + + if (!(host->no_dma || (host->cmd_flags & FIFO_READY))) + return; + + if (cmd->data->flags & MMC_DATA_WRITE) { + if (host->req->stop) { + if (!(host->cmd_flags & SCMD_ACTIVE)) { + host->cmd_flags |= SCMD_ACTIVE; + writel(TIFM_MMCSD_EOFB + | readl(sock->addr + + SOCK_MMCSD_INT_ENABLE), + sock->addr + + SOCK_MMCSD_INT_ENABLE); + tifm_sd_exec(host, host->req->stop); + return; + } else { + if (!(host->cmd_flags & SCMD_READY) + || (host->cmd_flags & CARD_BUSY)) + return; + writel((~TIFM_MMCSD_EOFB) + & readl(sock->addr + + SOCK_MMCSD_INT_ENABLE), + sock->addr + + SOCK_MMCSD_INT_ENABLE); + } + } else { + if (host->cmd_flags & CARD_BUSY) + return; + writel((~TIFM_MMCSD_EOFB) + & readl(sock->addr + + SOCK_MMCSD_INT_ENABLE), + sock->addr + SOCK_MMCSD_INT_ENABLE); + } + } else { + if (host->req->stop) { + if (!(host->cmd_flags & SCMD_ACTIVE)) { + host->cmd_flags |= SCMD_ACTIVE; + tifm_sd_exec(host, host->req->stop); + return; + } else { + if (!(host->cmd_flags & SCMD_READY)) + return; + } + } + } + } +finish_request: + tasklet_schedule(&host->finish_tasklet); +} + +/* Called from interrupt handler */ +static void tifm_sd_data_event(struct tifm_dev *sock) +{ + struct tifm_sd *host; + unsigned int fifo_status = 0; + struct mmc_data *r_data = NULL; + + spin_lock(&sock->lock); + host = mmc_priv((struct mmc_host*)tifm_get_drvdata(sock)); + fifo_status = readl(sock->addr + SOCK_DMA_FIFO_STATUS); + dev_dbg(&sock->dev, "data event: fifo_status %x, flags %x\n", + fifo_status, host->cmd_flags); + + if (host->req) { + r_data = host->req->cmd->data; + + if (r_data && (fifo_status & TIFM_FIFO_READY)) { + if (tifm_sd_set_dma_data(host, r_data)) { + host->cmd_flags |= FIFO_READY; + tifm_sd_check_status(host); + } + } + } + + writel(fifo_status, sock->addr + SOCK_DMA_FIFO_STATUS); + spin_unlock(&sock->lock); +} + +/* Called from interrupt handler */ +static void tifm_sd_card_event(struct tifm_dev *sock) +{ + struct tifm_sd *host; + unsigned int host_status = 0; + int cmd_error = MMC_ERR_NONE; + struct mmc_command *cmd = NULL; + unsigned long flags; + + spin_lock(&sock->lock); + host = mmc_priv((struct mmc_host*)tifm_get_drvdata(sock)); + host_status = readl(sock->addr + SOCK_MMCSD_STATUS); + dev_dbg(&sock->dev, "host event: host_status %x, flags %x\n", + host_status, host->cmd_flags); + + if (host->req) { + cmd = host->req->cmd; + + if (host_status & TIFM_MMCSD_ERRMASK) { + writel(host_status & TIFM_MMCSD_ERRMASK, + sock->addr + SOCK_MMCSD_STATUS); + if (host_status & TIFM_MMCSD_CTO) + cmd_error = MMC_ERR_TIMEOUT; + else if (host_status & TIFM_MMCSD_CCRC) + cmd_error = MMC_ERR_BADCRC; + + if (cmd->data) { + if (host_status & TIFM_MMCSD_DTO) + cmd->data->error = MMC_ERR_TIMEOUT; + else if (host_status & TIFM_MMCSD_DCRC) + cmd->data->error = MMC_ERR_BADCRC; + } + + writel(TIFM_FIFO_INT_SETALL, + sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR); + writel(TIFM_DMA_RESET, sock->addr + SOCK_DMA_CONTROL); + + if (host->req->stop) { + if (host->cmd_flags & SCMD_ACTIVE) { + host->req->stop->error = cmd_error; + host->cmd_flags |= SCMD_READY; + } else { + cmd->error = cmd_error; + host->cmd_flags |= SCMD_ACTIVE; + tifm_sd_exec(host, host->req->stop); + goto done; + } + } else + cmd->error = cmd_error; + } else { + if (host_status & (TIFM_MMCSD_EOC | TIFM_MMCSD_CERR)) { + if (!(host->cmd_flags & CMD_READY)) { + host->cmd_flags |= CMD_READY; + tifm_sd_fetch_resp(cmd, sock); + } else if (host->cmd_flags & SCMD_ACTIVE) { + host->cmd_flags |= SCMD_READY; + tifm_sd_fetch_resp(host->req->stop, + sock); + } + } + if (host_status & TIFM_MMCSD_BRS) + host->cmd_flags |= BRS_READY; + } + + if (host->no_dma && cmd->data) { + if (host_status & TIFM_MMCSD_AE) + writel(host_status & TIFM_MMCSD_AE, + sock->addr + SOCK_MMCSD_STATUS); + + if (host_status & (TIFM_MMCSD_AE | TIFM_MMCSD_AF + | TIFM_MMCSD_BRS)) { + local_irq_save(flags); + tifm_sd_transfer_data(host); + local_irq_restore(flags); + host_status &= ~TIFM_MMCSD_AE; + } + } + + if (host_status & TIFM_MMCSD_EOFB) + host->cmd_flags &= ~CARD_BUSY; + else if (host_status & TIFM_MMCSD_CB) + host->cmd_flags |= CARD_BUSY; + + tifm_sd_check_status(host); + } +done: + writel(host_status, sock->addr + SOCK_MMCSD_STATUS); + spin_unlock(&sock->lock); +} + +static void tifm_sd_set_data_timeout(struct tifm_sd *host, + struct mmc_data *data) +{ + struct tifm_dev *sock = host->dev; + unsigned int data_timeout = data->timeout_clks; + + if (fixed_timeout) + return; + + data_timeout += data->timeout_ns / + ((1000000000UL / host->clk_freq) * host->clk_div); + + if (data_timeout < 0xffff) { + writel(data_timeout, sock->addr + SOCK_MMCSD_DATA_TO); + writel((~TIFM_MMCSD_DPE) + & readl(sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG), + sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG); + } else { + data_timeout = (data_timeout >> 10) + 1; + if (data_timeout > 0xffff) + data_timeout = 0; /* set to unlimited */ + writel(data_timeout, sock->addr + SOCK_MMCSD_DATA_TO); + writel(TIFM_MMCSD_DPE + | readl(sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG), + sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG); + } +} + +static void tifm_sd_request(struct mmc_host *mmc, struct mmc_request *mrq) +{ + struct tifm_sd *host = mmc_priv(mmc); + struct tifm_dev *sock = host->dev; + unsigned long flags; + struct mmc_data *r_data = mrq->cmd->data; + + spin_lock_irqsave(&sock->lock, flags); + if (host->eject) { + spin_unlock_irqrestore(&sock->lock, flags); + goto err_out; + } + + if (host->req) { + printk(KERN_ERR "%s : unfinished request detected\n", + sock->dev.bus_id); + spin_unlock_irqrestore(&sock->lock, flags); + goto err_out; + } + + host->cmd_flags = 0; + host->block_pos = 0; + host->sg_pos = 0; + + if (r_data) { + tifm_sd_set_data_timeout(host, r_data); + + if ((r_data->flags & MMC_DATA_WRITE) && !mrq->stop) + writel(TIFM_MMCSD_EOFB + | readl(sock->addr + SOCK_MMCSD_INT_ENABLE), + sock->addr + SOCK_MMCSD_INT_ENABLE); + + if (host->no_dma) { + writel(TIFM_MMCSD_BUFINT + | readl(sock->addr + SOCK_MMCSD_INT_ENABLE), + sock->addr + SOCK_MMCSD_INT_ENABLE); + writel(((TIFM_MMCSD_FIFO_SIZE - 1) << 8) + | (TIFM_MMCSD_FIFO_SIZE - 1), + sock->addr + SOCK_MMCSD_BUFFER_CONFIG); + + host->sg_len = r_data->sg_len; + } else { + sg_init_one(&host->bounce_buf, host->bounce_buf_data, + r_data->blksz); + + if(1 != tifm_map_sg(sock, &host->bounce_buf, 1, + r_data->flags & MMC_DATA_WRITE + ? PCI_DMA_TODEVICE + : PCI_DMA_FROMDEVICE)) { + printk(KERN_ERR "%s : scatterlist map failed\n", + sock->dev.bus_id); + spin_unlock_irqrestore(&sock->lock, flags); + goto err_out; + } + host->sg_len = tifm_map_sg(sock, r_data->sg, + r_data->sg_len, + r_data->flags + & MMC_DATA_WRITE + ? PCI_DMA_TODEVICE + : PCI_DMA_FROMDEVICE); + if (host->sg_len < 1) { + printk(KERN_ERR "%s : scatterlist map failed\n", + sock->dev.bus_id); + tifm_unmap_sg(sock, &host->bounce_buf, 1, + r_data->flags & MMC_DATA_WRITE + ? PCI_DMA_TODEVICE + : PCI_DMA_FROMDEVICE); + spin_unlock_irqrestore(&sock->lock, flags); + goto err_out; + } + + writel(TIFM_FIFO_INT_SETALL, + sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR); + writel(ilog2(r_data->blksz) - 2, + sock->addr + SOCK_FIFO_PAGE_SIZE); + writel(TIFM_FIFO_ENABLE, + sock->addr + SOCK_FIFO_CONTROL); + writel(TIFM_FIFO_INTMASK, + sock->addr + SOCK_DMA_FIFO_INT_ENABLE_SET); + + if (r_data->flags & MMC_DATA_WRITE) + writel(TIFM_MMCSD_TXDE, + sock->addr + SOCK_MMCSD_BUFFER_CONFIG); + else + writel(TIFM_MMCSD_RXDE, + sock->addr + SOCK_MMCSD_BUFFER_CONFIG); + + tifm_sd_set_dma_data(host, r_data); + } + + writel(r_data->blocks - 1, + sock->addr + SOCK_MMCSD_NUM_BLOCKS); + writel(r_data->blksz - 1, + sock->addr + SOCK_MMCSD_BLOCK_LEN); + } + + host->req = mrq; + mod_timer(&host->timer, jiffies + host->timeout_jiffies); + writel(TIFM_CTRL_LED | readl(sock->addr + SOCK_CONTROL), + sock->addr + SOCK_CONTROL); + tifm_sd_exec(host, mrq->cmd); + spin_unlock_irqrestore(&sock->lock, flags); + return; + +err_out: + mrq->cmd->error = MMC_ERR_TIMEOUT; + mmc_request_done(mmc, mrq); +} + +static void tifm_sd_end_cmd(unsigned long data) +{ + struct tifm_sd *host = (struct tifm_sd*)data; + struct tifm_dev *sock = host->dev; + struct mmc_host *mmc = tifm_get_drvdata(sock); + struct mmc_request *mrq; + struct mmc_data *r_data = NULL; + unsigned long flags; + + spin_lock_irqsave(&sock->lock, flags); + + del_timer(&host->timer); + mrq = host->req; + host->req = NULL; + + if (!mrq) { + printk(KERN_ERR " %s : no request to complete?\n", + sock->dev.bus_id); + spin_unlock_irqrestore(&sock->lock, flags); + return; + } + + r_data = mrq->cmd->data; + if (r_data) { + if (host->no_dma) { + writel((~TIFM_MMCSD_BUFINT) + & readl(sock->addr + SOCK_MMCSD_INT_ENABLE), + sock->addr + SOCK_MMCSD_INT_ENABLE); + } else { + tifm_unmap_sg(sock, &host->bounce_buf, 1, + (r_data->flags & MMC_DATA_WRITE) + ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE); + tifm_unmap_sg(sock, r_data->sg, r_data->sg_len, + (r_data->flags & MMC_DATA_WRITE) + ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE); + } + + r_data->bytes_xfered = r_data->blocks + - readl(sock->addr + SOCK_MMCSD_NUM_BLOCKS) - 1; + r_data->bytes_xfered *= r_data->blksz; + r_data->bytes_xfered += r_data->blksz + - readl(sock->addr + SOCK_MMCSD_BLOCK_LEN) + 1; + } + + writel((~TIFM_CTRL_LED) & readl(sock->addr + SOCK_CONTROL), + sock->addr + SOCK_CONTROL); + + spin_unlock_irqrestore(&sock->lock, flags); + mmc_request_done(mmc, mrq); +} + +static void tifm_sd_abort(unsigned long data) +{ + struct tifm_sd *host = (struct tifm_sd*)data; + + printk(KERN_ERR + "%s : card failed to respond for a long period of time " + "(%x, %x)\n", + host->dev->dev.bus_id, host->req->cmd->opcode, host->cmd_flags); + + tifm_eject(host->dev); +} + +static void tifm_sd_ios(struct mmc_host *mmc, struct mmc_ios *ios) +{ + struct tifm_sd *host = mmc_priv(mmc); + struct tifm_dev *sock = host->dev; + unsigned int clk_div1, clk_div2; + unsigned long flags; + + spin_lock_irqsave(&sock->lock, flags); + + dev_dbg(&sock->dev, "ios: clock = %u, vdd = %x, bus_mode = %x, " + "chip_select = %x, power_mode = %x, bus_width = %x\n", + ios->clock, ios->vdd, ios->bus_mode, ios->chip_select, + ios->power_mode, ios->bus_width); + + if (ios->bus_width == MMC_BUS_WIDTH_4) { + writel(TIFM_MMCSD_4BBUS | readl(sock->addr + SOCK_MMCSD_CONFIG), + sock->addr + SOCK_MMCSD_CONFIG); + } else { + writel((~TIFM_MMCSD_4BBUS) + & readl(sock->addr + SOCK_MMCSD_CONFIG), + sock->addr + SOCK_MMCSD_CONFIG); + } + + if (ios->clock) { + clk_div1 = 20000000 / ios->clock; + if (!clk_div1) + clk_div1 = 1; + + clk_div2 = 24000000 / ios->clock; + if (!clk_div2) + clk_div2 = 1; + + if ((20000000 / clk_div1) > ios->clock) + clk_div1++; + if ((24000000 / clk_div2) > ios->clock) + clk_div2++; + if ((20000000 / clk_div1) > (24000000 / clk_div2)) { + host->clk_freq = 20000000; + host->clk_div = clk_div1; + writel((~TIFM_CTRL_FAST_CLK) + & readl(sock->addr + SOCK_CONTROL), + sock->addr + SOCK_CONTROL); + } else { + host->clk_freq = 24000000; + host->clk_div = clk_div2; + writel(TIFM_CTRL_FAST_CLK + | readl(sock->addr + SOCK_CONTROL), + sock->addr + SOCK_CONTROL); + } + } else { + host->clk_div = 0; + } + host->clk_div &= TIFM_MMCSD_CLKMASK; + writel(host->clk_div + | ((~TIFM_MMCSD_CLKMASK) + & readl(sock->addr + SOCK_MMCSD_CONFIG)), + sock->addr + SOCK_MMCSD_CONFIG); + + host->open_drain = (ios->bus_mode == MMC_BUSMODE_OPENDRAIN); + + /* chip_select : maybe later */ + //vdd + //power is set before probe / after remove + + spin_unlock_irqrestore(&sock->lock, flags); +} + +static int tifm_sd_ro(struct mmc_host *mmc) +{ + int rc = 0; + struct tifm_sd *host = mmc_priv(mmc); + struct tifm_dev *sock = host->dev; + unsigned long flags; + + spin_lock_irqsave(&sock->lock, flags); + if (TIFM_MMCSD_CARD_RO & readl(sock->addr + SOCK_PRESENT_STATE)) + rc = 1; + spin_unlock_irqrestore(&sock->lock, flags); + return rc; +} + +static const struct mmc_host_ops tifm_sd_ops = { + .request = tifm_sd_request, + .set_ios = tifm_sd_ios, + .get_ro = tifm_sd_ro +}; + +static int tifm_sd_initialize_host(struct tifm_sd *host) +{ + int rc; + unsigned int host_status = 0; + struct tifm_dev *sock = host->dev; + + writel(0, sock->addr + SOCK_MMCSD_INT_ENABLE); + mmiowb(); + host->clk_div = 61; + host->clk_freq = 20000000; + writel(TIFM_MMCSD_RESET, sock->addr + SOCK_MMCSD_SYSTEM_CONTROL); + writel(host->clk_div | TIFM_MMCSD_POWER, + sock->addr + SOCK_MMCSD_CONFIG); + + /* wait up to 0.51 sec for reset */ + for (rc = 32; rc <= 256; rc <<= 1) { + if (1 & readl(sock->addr + SOCK_MMCSD_SYSTEM_STATUS)) { + rc = 0; + break; + } + msleep(rc); + } + + if (rc) { + printk(KERN_ERR "%s : controller failed to reset\n", + sock->dev.bus_id); + return -ENODEV; + } + + writel(0, sock->addr + SOCK_MMCSD_NUM_BLOCKS); + writel(host->clk_div | TIFM_MMCSD_POWER, + sock->addr + SOCK_MMCSD_CONFIG); + writel(TIFM_MMCSD_RXDE, sock->addr + SOCK_MMCSD_BUFFER_CONFIG); + + // command timeout fixed to 64 clocks for now + writel(64, sock->addr + SOCK_MMCSD_COMMAND_TO); + writel(TIFM_MMCSD_INAB, sock->addr + SOCK_MMCSD_COMMAND); + + for (rc = 16; rc <= 64; rc <<= 1) { + host_status = readl(sock->addr + SOCK_MMCSD_STATUS); + writel(host_status, sock->addr + SOCK_MMCSD_STATUS); + if (!(host_status & TIFM_MMCSD_ERRMASK) + && (host_status & TIFM_MMCSD_EOC)) { + rc = 0; + break; + } + msleep(rc); + } + + if (rc) { + printk(KERN_ERR + "%s : card not ready - probe failed on initialization\n", + sock->dev.bus_id); + return -ENODEV; + } + + writel(TIFM_MMCSD_CERR | TIFM_MMCSD_BRS | TIFM_MMCSD_EOC + | TIFM_MMCSD_ERRMASK, + sock->addr + SOCK_MMCSD_INT_ENABLE); + mmiowb(); + + return 0; +} + +static int tifm_sd_probe(struct tifm_dev *sock) +{ + struct mmc_host *mmc; + struct tifm_sd *host; + int rc = -EIO; + + if (!(TIFM_SOCK_STATE_OCCUPIED + & readl(sock->addr + SOCK_PRESENT_STATE))) { + printk(KERN_WARNING "%s : card gone, unexpectedly\n", + sock->dev.bus_id); + return rc; + } + + mmc = mmc_alloc_host(sizeof(struct tifm_sd), &sock->dev); + if (!mmc) + return -ENOMEM; + + host = mmc_priv(mmc); + host->no_dma = no_dma; + tifm_set_drvdata(sock, mmc); + host->dev = sock; + host->timeout_jiffies = msecs_to_jiffies(1000); + + tasklet_init(&host->finish_tasklet, tifm_sd_end_cmd, + (unsigned long)host); + setup_timer(&host->timer, tifm_sd_abort, (unsigned long)host); + + mmc->ops = &tifm_sd_ops; + mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34; + mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_MULTIWRITE; + mmc->f_min = 20000000 / 60; + mmc->f_max = 24000000; + + mmc->max_blk_count = 2048; + mmc->max_hw_segs = mmc->max_blk_count; + mmc->max_blk_size = min(TIFM_MMCSD_MAX_BLOCK_SIZE, PAGE_SIZE); + mmc->max_seg_size = mmc->max_blk_count * mmc->max_blk_size; + mmc->max_req_size = mmc->max_seg_size; + mmc->max_phys_segs = mmc->max_hw_segs; + + sock->card_event = tifm_sd_card_event; + sock->data_event = tifm_sd_data_event; + rc = tifm_sd_initialize_host(host); + + if (!rc) + rc = mmc_add_host(mmc); + if (!rc) + return 0; + + mmc_free_host(mmc); + return rc; +} + +static void tifm_sd_remove(struct tifm_dev *sock) +{ + struct mmc_host *mmc = tifm_get_drvdata(sock); + struct tifm_sd *host = mmc_priv(mmc); + unsigned long flags; + + spin_lock_irqsave(&sock->lock, flags); + host->eject = 1; + writel(0, sock->addr + SOCK_MMCSD_INT_ENABLE); + mmiowb(); + spin_unlock_irqrestore(&sock->lock, flags); + + tasklet_kill(&host->finish_tasklet); + + spin_lock_irqsave(&sock->lock, flags); + if (host->req) { + writel(TIFM_FIFO_INT_SETALL, + sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR); + writel(0, sock->addr + SOCK_DMA_FIFO_INT_ENABLE_SET); + host->req->cmd->error = MMC_ERR_TIMEOUT; + if (host->req->stop) + host->req->stop->error = MMC_ERR_TIMEOUT; + tasklet_schedule(&host->finish_tasklet); + } + spin_unlock_irqrestore(&sock->lock, flags); + mmc_remove_host(mmc); + dev_dbg(&sock->dev, "after remove\n"); + + /* The meaning of the bit majority in this constant is unknown. */ + writel(0xfff8 & readl(sock->addr + SOCK_CONTROL), + sock->addr + SOCK_CONTROL); + + mmc_free_host(mmc); +} + +#ifdef CONFIG_PM + +static int tifm_sd_suspend(struct tifm_dev *sock, pm_message_t state) +{ + struct mmc_host *mmc = tifm_get_drvdata(sock); + int rc; + + rc = mmc_suspend_host(mmc, state); + /* The meaning of the bit majority in this constant is unknown. */ + writel(0xfff8 & readl(sock->addr + SOCK_CONTROL), + sock->addr + SOCK_CONTROL); + return rc; +} + +static int tifm_sd_resume(struct tifm_dev *sock) +{ + struct mmc_host *mmc = tifm_get_drvdata(sock); + struct tifm_sd *host = mmc_priv(mmc); + int rc; + + rc = tifm_sd_initialize_host(host); + dev_dbg(&sock->dev, "resume initialize %d\n", rc); + + if (rc) + host->eject = 1; + else + rc = mmc_resume_host(mmc); + + return rc; +} + +#else + +#define tifm_sd_suspend NULL +#define tifm_sd_resume NULL + +#endif /* CONFIG_PM */ + +static struct tifm_device_id tifm_sd_id_tbl[] = { + { TIFM_TYPE_SD }, { } +}; + +static struct tifm_driver tifm_sd_driver = { + .driver = { + .name = DRIVER_NAME, + .owner = THIS_MODULE + }, + .id_table = tifm_sd_id_tbl, + .probe = tifm_sd_probe, + .remove = tifm_sd_remove, + .suspend = tifm_sd_suspend, + .resume = tifm_sd_resume +}; + +static int __init tifm_sd_init(void) +{ + return tifm_register_driver(&tifm_sd_driver); +} + +static void __exit tifm_sd_exit(void) +{ + tifm_unregister_driver(&tifm_sd_driver); +} + +MODULE_AUTHOR("Alex Dubov"); +MODULE_DESCRIPTION("TI FlashMedia SD driver"); +MODULE_LICENSE("GPL"); +MODULE_DEVICE_TABLE(tifm, tifm_sd_id_tbl); +MODULE_VERSION(DRIVER_VERSION); + +module_init(tifm_sd_init); +module_exit(tifm_sd_exit); diff --git a/drivers/mmc/wbsd.c b/drivers/mmc/host/wbsd.c index 05ccfc43168..867ca6a6929 100644 --- a/drivers/mmc/wbsd.c +++ b/drivers/mmc/host/wbsd.c @@ -1,7 +1,7 @@ /* * linux/drivers/mmc/wbsd.c - Winbond W83L51xD SD/MMC driver * - * Copyright (C) 2004-2006 Pierre Ossman, All Rights Reserved. + * Copyright (C) 2004-2007 Pierre Ossman, All Rights Reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -33,7 +33,6 @@ #include <linux/pnp.h> #include <linux/highmem.h> #include <linux/mmc/host.h> -#include <linux/mmc/protocol.h> #include <asm/io.h> #include <asm/dma.h> @@ -178,9 +177,8 @@ static void wbsd_init_device(struct wbsd_host *host) ier = 0; ier |= WBSD_EINT_CARD; ier |= WBSD_EINT_FIFO_THRE; - ier |= WBSD_EINT_CCRC; - ier |= WBSD_EINT_TIMEOUT; ier |= WBSD_EINT_CRC; + ier |= WBSD_EINT_TIMEOUT; ier |= WBSD_EINT_TC; outb(ier, host->base + WBSD_EIR); @@ -278,90 +276,36 @@ static inline char *wbsd_sg_to_buffer(struct wbsd_host *host) static inline void wbsd_sg_to_dma(struct wbsd_host *host, struct mmc_data *data) { - unsigned int len, i, size; + unsigned int len, i; struct scatterlist *sg; char *dmabuf = host->dma_buffer; char *sgbuf; - size = host->size; - sg = data->sg; len = data->sg_len; - /* - * Just loop through all entries. Size might not - * be the entire list though so make sure that - * we do not transfer too much. - */ for (i = 0; i < len; i++) { sgbuf = page_address(sg[i].page) + sg[i].offset; - if (size < sg[i].length) - memcpy(dmabuf, sgbuf, size); - else - memcpy(dmabuf, sgbuf, sg[i].length); + memcpy(dmabuf, sgbuf, sg[i].length); dmabuf += sg[i].length; - - if (size < sg[i].length) - size = 0; - else - size -= sg[i].length; - - if (size == 0) - break; } - - /* - * Check that we didn't get a request to transfer - * more data than can fit into the SG list. - */ - - BUG_ON(size != 0); - - host->size -= size; } static inline void wbsd_dma_to_sg(struct wbsd_host *host, struct mmc_data *data) { - unsigned int len, i, size; + unsigned int len, i; struct scatterlist *sg; char *dmabuf = host->dma_buffer; char *sgbuf; - size = host->size; - sg = data->sg; len = data->sg_len; - /* - * Just loop through all entries. Size might not - * be the entire list though so make sure that - * we do not transfer too much. - */ for (i = 0; i < len; i++) { sgbuf = page_address(sg[i].page) + sg[i].offset; - if (size < sg[i].length) - memcpy(sgbuf, dmabuf, size); - else - memcpy(sgbuf, dmabuf, sg[i].length); + memcpy(sgbuf, dmabuf, sg[i].length); dmabuf += sg[i].length; - - if (size < sg[i].length) - size = 0; - else - size -= sg[i].length; - - if (size == 0) - break; } - - /* - * Check that we didn't get a request to transfer - * more data than can fit into the SG list. - */ - - BUG_ON(size != 0); - - host->size -= size; } /* @@ -484,7 +428,7 @@ static void wbsd_empty_fifo(struct wbsd_host *host) /* * Handle excessive data. */ - if (data->bytes_xfered == host->size) + if (host->num_sg == 0) return; buffer = wbsd_sg_to_buffer(host) + host->offset; @@ -514,31 +458,14 @@ static void wbsd_empty_fifo(struct wbsd_host *host) data->bytes_xfered++; /* - * Transfer done? - */ - if (data->bytes_xfered == host->size) - return; - - /* * End of scatter list entry? */ if (host->remain == 0) { /* * Get next entry. Check if last. */ - if (!wbsd_next_sg(host)) { - /* - * We should never reach this point. - * It means that we're trying to - * transfer more blocks than can fit - * into the scatter list. - */ - BUG_ON(1); - - host->size = data->bytes_xfered; - + if (!wbsd_next_sg(host)) return; - } buffer = wbsd_sg_to_buffer(host); } @@ -550,7 +477,7 @@ static void wbsd_empty_fifo(struct wbsd_host *host) * hardware problem. The chip doesn't trigger * FIFO threshold interrupts properly. */ - if ((host->size - data->bytes_xfered) < 16) + if ((data->blocks * data->blksz - data->bytes_xfered) < 16) tasklet_schedule(&host->fifo_tasklet); } @@ -564,7 +491,7 @@ static void wbsd_fill_fifo(struct wbsd_host *host) * Check that we aren't being called after the * entire buffer has been transfered. */ - if (data->bytes_xfered == host->size) + if (host->num_sg == 0) return; buffer = wbsd_sg_to_buffer(host) + host->offset; @@ -594,31 +521,14 @@ static void wbsd_fill_fifo(struct wbsd_host *host) data->bytes_xfered++; /* - * Transfer done? - */ - if (data->bytes_xfered == host->size) - return; - - /* * End of scatter list entry? */ if (host->remain == 0) { /* * Get next entry. Check if last. */ - if (!wbsd_next_sg(host)) { - /* - * We should never reach this point. - * It means that we're trying to - * transfer more blocks than can fit - * into the scatter list. - */ - BUG_ON(1); - - host->size = data->bytes_xfered; - + if (!wbsd_next_sg(host)) return; - } buffer = wbsd_sg_to_buffer(host); } @@ -638,6 +548,7 @@ static void wbsd_prepare_data(struct wbsd_host *host, struct mmc_data *data) u16 blksize; u8 setup; unsigned long dmaflags; + unsigned int size; DBGF("blksz %04x blks %04x flags %08x\n", data->blksz, data->blocks, data->flags); @@ -647,7 +558,7 @@ static void wbsd_prepare_data(struct wbsd_host *host, struct mmc_data *data) /* * Calculate size. */ - host->size = data->blocks * data->blksz; + size = data->blocks * data->blksz; /* * Check timeout values for overflow. @@ -705,8 +616,8 @@ static void wbsd_prepare_data(struct wbsd_host *host, struct mmc_data *data) /* * The buffer for DMA is only 64 kB. */ - BUG_ON(host->size > 0x10000); - if (host->size > 0x10000) { + BUG_ON(size > 0x10000); + if (size > 0x10000) { data->error = MMC_ERR_INVALID; return; } @@ -729,7 +640,7 @@ static void wbsd_prepare_data(struct wbsd_host *host, struct mmc_data *data) else set_dma_mode(host->dma, DMA_MODE_WRITE & ~0x40); set_dma_addr(host->dma, host->dma_addr); - set_dma_count(host->dma, host->size); + set_dma_count(host->dma, size); enable_dma(host->dma); release_dma_lock(dmaflags); @@ -812,6 +723,10 @@ static void wbsd_finish_data(struct wbsd_host *host, struct mmc_data *data) count = get_dma_residue(host->dma); release_dma_lock(dmaflags); + data->bytes_xfered = host->mrq->data->blocks * + host->mrq->data->blksz - count; + data->bytes_xfered -= data->bytes_xfered % data->blksz; + /* * Any leftover data? */ @@ -820,7 +735,8 @@ static void wbsd_finish_data(struct wbsd_host *host, struct mmc_data *data) "%d bytes left.\n", mmc_hostname(host->mmc), count); - data->error = MMC_ERR_FAILED; + if (data->error == MMC_ERR_NONE) + data->error = MMC_ERR_FAILED; } else { /* * Transfer data from DMA buffer to @@ -828,8 +744,11 @@ static void wbsd_finish_data(struct wbsd_host *host, struct mmc_data *data) */ if (data->flags & MMC_DATA_READ) wbsd_dma_to_sg(host, data); + } - data->bytes_xfered = host->size; + if (data->error != MMC_ERR_NONE) { + if (data->bytes_xfered) + data->bytes_xfered -= data->blksz; } } @@ -869,24 +788,7 @@ static void wbsd_request(struct mmc_host *mmc, struct mmc_request *mrq) goto done; } - /* - * Does the request include data? - */ if (cmd->data) { - wbsd_prepare_data(host, cmd->data); - - if (cmd->data->error != MMC_ERR_NONE) - goto done; - } - - wbsd_send_command(host, cmd); - - /* - * If this is a data transfer the request - * will be finished after the data has - * transfered. - */ - if (cmd->data && (cmd->error == MMC_ERR_NONE)) { /* * The hardware is so delightfully stupid that it has a list * of "data" commands. If a command isn't on this list, it'll @@ -918,14 +820,30 @@ static void wbsd_request(struct mmc_host *mmc, struct mmc_request *mrq) "supported by this controller.\n", mmc_hostname(host->mmc), cmd->opcode); #endif - cmd->data->error = MMC_ERR_INVALID; - - if (cmd->data->stop) - wbsd_send_command(host, cmd->data->stop); + cmd->error = MMC_ERR_INVALID; goto done; }; + } + + /* + * Does the request include data? + */ + if (cmd->data) { + wbsd_prepare_data(host, cmd->data); + + if (cmd->data->error != MMC_ERR_NONE) + goto done; + } + + wbsd_send_command(host, cmd); + /* + * If this is a data transfer the request + * will be finished after the data has + * transfered. + */ + if (cmd->data && (cmd->error == MMC_ERR_NONE)) { /* * Dirty fix for hardware bug. */ @@ -1167,7 +1085,7 @@ static void wbsd_tasklet_fifo(unsigned long param) /* * Done? */ - if (host->size == data->bytes_xfered) { + if (host->num_sg == 0) { wbsd_write_index(host, WBSD_IDX_FIFOEN, 0); tasklet_schedule(&host->finish_tasklet); } @@ -1245,30 +1163,6 @@ end: spin_unlock(&host->lock); } -static void wbsd_tasklet_block(unsigned long param) -{ - struct wbsd_host *host = (struct wbsd_host *)param; - struct mmc_data *data; - - spin_lock(&host->lock); - - if ((wbsd_read_index(host, WBSD_IDX_CRCSTATUS) & WBSD_CRC_MASK) != - WBSD_CRC_OK) { - data = wbsd_get_data(host); - if (!data) - goto end; - - DBGF("CRC error\n"); - - data->error = MMC_ERR_BADCRC; - - tasklet_schedule(&host->finish_tasklet); - } - -end: - spin_unlock(&host->lock); -} - /* * Interrupt handling */ @@ -1299,8 +1193,6 @@ static irqreturn_t wbsd_irq(int irq, void *dev_id) tasklet_hi_schedule(&host->crc_tasklet); if (isr & WBSD_INT_TIMEOUT) tasklet_hi_schedule(&host->timeout_tasklet); - if (isr & WBSD_INT_BUSYEND) - tasklet_hi_schedule(&host->block_tasklet); if (isr & WBSD_INT_TC) tasklet_schedule(&host->finish_tasklet); @@ -1601,8 +1493,6 @@ static int __devinit wbsd_request_irq(struct wbsd_host *host, int irq) (unsigned long)host); tasklet_init(&host->finish_tasklet, wbsd_tasklet_finish, (unsigned long)host); - tasklet_init(&host->block_tasklet, wbsd_tasklet_block, - (unsigned long)host); return 0; } @@ -1621,7 +1511,6 @@ static void __devexit wbsd_release_irq(struct wbsd_host *host) tasklet_kill(&host->crc_tasklet); tasklet_kill(&host->timeout_tasklet); tasklet_kill(&host->finish_tasklet); - tasklet_kill(&host->block_tasklet); } /* diff --git a/drivers/mmc/wbsd.h b/drivers/mmc/host/wbsd.h index d06718b0e2a..873bda1e59b 100644 --- a/drivers/mmc/wbsd.h +++ b/drivers/mmc/host/wbsd.h @@ -1,7 +1,7 @@ /* * linux/drivers/mmc/wbsd.h - Winbond W83L51xD SD/MMC driver * - * Copyright (C) 2004-2005 Pierre Ossman, All Rights Reserved. + * Copyright (C) 2004-2007 Pierre Ossman, All Rights Reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -46,10 +46,10 @@ #define WBSD_EINT_CARD 0x40 #define WBSD_EINT_FIFO_THRE 0x20 -#define WBSD_EINT_CCRC 0x10 +#define WBSD_EINT_CRC 0x10 #define WBSD_EINT_TIMEOUT 0x08 #define WBSD_EINT_PROGEND 0x04 -#define WBSD_EINT_CRC 0x02 +#define WBSD_EINT_BUSYEND 0x02 #define WBSD_EINT_TC 0x01 #define WBSD_INT_PENDING 0x80 @@ -158,8 +158,6 @@ struct wbsd_host unsigned int offset; /* Offset into current entry */ unsigned int remain; /* Data left in curren entry */ - int size; /* Total size of transfer */ - char* dma_buffer; /* ISA DMA buffer */ dma_addr_t dma_addr; /* Physical address for same */ @@ -182,7 +180,6 @@ struct wbsd_host struct tasklet_struct crc_tasklet; struct tasklet_struct timeout_tasklet; struct tasklet_struct finish_tasklet; - struct tasklet_struct block_tasklet; struct timer_list ignore_timer; /* Ignore detection timer */ }; diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c deleted file mode 100644 index 4a73e8b2428..00000000000 --- a/drivers/mmc/mmc.c +++ /dev/null @@ -1,1724 +0,0 @@ -/* - * linux/drivers/mmc/mmc.c - * - * Copyright (C) 2003-2004 Russell King, All Rights Reserved. - * SD support Copyright (C) 2004 Ian Molton, All Rights Reserved. - * SD support Copyright (C) 2005 Pierre Ossman, All Rights Reserved. - * MMCv4 support Copyright (C) 2006 Philip Langdale, All Rights Reserved. - * - * 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. - */ -#include <linux/module.h> -#include <linux/init.h> -#include <linux/interrupt.h> -#include <linux/completion.h> -#include <linux/device.h> -#include <linux/delay.h> -#include <linux/pagemap.h> -#include <linux/err.h> -#include <asm/scatterlist.h> -#include <linux/scatterlist.h> - -#include <linux/mmc/card.h> -#include <linux/mmc/host.h> -#include <linux/mmc/protocol.h> - -#include "mmc.h" - -#define CMD_RETRIES 3 - -/* - * OCR Bit positions to 10s of Vdd mV. - */ -static const unsigned short mmc_ocr_bit_to_vdd[] = { - 150, 155, 160, 165, 170, 180, 190, 200, - 210, 220, 230, 240, 250, 260, 270, 280, - 290, 300, 310, 320, 330, 340, 350, 360 -}; - -static const unsigned int tran_exp[] = { - 10000, 100000, 1000000, 10000000, - 0, 0, 0, 0 -}; - -static const unsigned char tran_mant[] = { - 0, 10, 12, 13, 15, 20, 25, 30, - 35, 40, 45, 50, 55, 60, 70, 80, -}; - -static const unsigned int tacc_exp[] = { - 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, -}; - -static const unsigned int tacc_mant[] = { - 0, 10, 12, 13, 15, 20, 25, 30, - 35, 40, 45, 50, 55, 60, 70, 80, -}; - - -/** - * mmc_request_done - finish processing an MMC request - * @host: MMC host which completed request - * @mrq: MMC request which request - * - * MMC drivers should call this function when they have completed - * their processing of a request. - */ -void mmc_request_done(struct mmc_host *host, struct mmc_request *mrq) -{ - struct mmc_command *cmd = mrq->cmd; - int err = cmd->error; - - pr_debug("%s: req done (CMD%u): %d/%d/%d: %08x %08x %08x %08x\n", - mmc_hostname(host), cmd->opcode, err, - mrq->data ? mrq->data->error : 0, - mrq->stop ? mrq->stop->error : 0, - cmd->resp[0], cmd->resp[1], cmd->resp[2], cmd->resp[3]); - - if (err && cmd->retries) { - cmd->retries--; - cmd->error = 0; - host->ops->request(host, mrq); - } else if (mrq->done) { - mrq->done(mrq); - } -} - -EXPORT_SYMBOL(mmc_request_done); - -/** - * mmc_start_request - start a command on a host - * @host: MMC host to start command on - * @mrq: MMC request to start - * - * Queue a command on the specified host. We expect the - * caller to be holding the host lock with interrupts disabled. - */ -void -mmc_start_request(struct mmc_host *host, struct mmc_request *mrq) -{ - pr_debug("%s: starting CMD%u arg %08x flags %08x\n", - mmc_hostname(host), mrq->cmd->opcode, - mrq->cmd->arg, mrq->cmd->flags); - - WARN_ON(!host->claimed); - - mrq->cmd->error = 0; - mrq->cmd->mrq = mrq; - if (mrq->data) { - BUG_ON(mrq->data->blksz > host->max_blk_size); - BUG_ON(mrq->data->blocks > host->max_blk_count); - BUG_ON(mrq->data->blocks * mrq->data->blksz > - host->max_req_size); - - mrq->cmd->data = mrq->data; - mrq->data->error = 0; - mrq->data->mrq = mrq; - if (mrq->stop) { - mrq->data->stop = mrq->stop; - mrq->stop->error = 0; - mrq->stop->mrq = mrq; - } - } - host->ops->request(host, mrq); -} - -EXPORT_SYMBOL(mmc_start_request); - -static void mmc_wait_done(struct mmc_request *mrq) -{ - complete(mrq->done_data); -} - -int mmc_wait_for_req(struct mmc_host *host, struct mmc_request *mrq) -{ - DECLARE_COMPLETION_ONSTACK(complete); - - mrq->done_data = &complete; - mrq->done = mmc_wait_done; - - mmc_start_request(host, mrq); - - wait_for_completion(&complete); - - return 0; -} - -EXPORT_SYMBOL(mmc_wait_for_req); - -/** - * mmc_wait_for_cmd - start a command and wait for completion - * @host: MMC host to start command - * @cmd: MMC command to start - * @retries: maximum number of retries - * - * Start a new MMC command for a host, and wait for the command - * to complete. Return any error that occurred while the command - * was executing. Do not attempt to parse the response. - */ -int mmc_wait_for_cmd(struct mmc_host *host, struct mmc_command *cmd, int retries) -{ - struct mmc_request mrq; - - BUG_ON(!host->claimed); - - memset(&mrq, 0, sizeof(struct mmc_request)); - - memset(cmd->resp, 0, sizeof(cmd->resp)); - cmd->retries = retries; - - mrq.cmd = cmd; - cmd->data = NULL; - - mmc_wait_for_req(host, &mrq); - - return cmd->error; -} - -EXPORT_SYMBOL(mmc_wait_for_cmd); - -/** - * mmc_wait_for_app_cmd - start an application command and wait for - completion - * @host: MMC host to start command - * @rca: RCA to send MMC_APP_CMD to - * @cmd: MMC command to start - * @retries: maximum number of retries - * - * Sends a MMC_APP_CMD, checks the card response, sends the command - * in the parameter and waits for it to complete. Return any error - * that occurred while the command was executing. Do not attempt to - * parse the response. - */ -int mmc_wait_for_app_cmd(struct mmc_host *host, unsigned int rca, - struct mmc_command *cmd, int retries) -{ - struct mmc_request mrq; - struct mmc_command appcmd; - - int i, err; - - BUG_ON(!host->claimed); - BUG_ON(retries < 0); - - err = MMC_ERR_INVALID; - - /* - * We have to resend MMC_APP_CMD for each attempt so - * we cannot use the retries field in mmc_command. - */ - for (i = 0;i <= retries;i++) { - memset(&mrq, 0, sizeof(struct mmc_request)); - - appcmd.opcode = MMC_APP_CMD; - appcmd.arg = rca << 16; - appcmd.flags = MMC_RSP_R1 | MMC_CMD_AC; - appcmd.retries = 0; - memset(appcmd.resp, 0, sizeof(appcmd.resp)); - appcmd.data = NULL; - - mrq.cmd = &appcmd; - appcmd.data = NULL; - - mmc_wait_for_req(host, &mrq); - - if (appcmd.error) { - err = appcmd.error; - continue; - } - - /* Check that card supported application commands */ - if (!(appcmd.resp[0] & R1_APP_CMD)) - return MMC_ERR_FAILED; - - memset(&mrq, 0, sizeof(struct mmc_request)); - - memset(cmd->resp, 0, sizeof(cmd->resp)); - cmd->retries = 0; - - mrq.cmd = cmd; - cmd->data = NULL; - - mmc_wait_for_req(host, &mrq); - - err = cmd->error; - if (cmd->error == MMC_ERR_NONE) - break; - } - - return err; -} - -EXPORT_SYMBOL(mmc_wait_for_app_cmd); - -/** - * mmc_set_data_timeout - set the timeout for a data command - * @data: data phase for command - * @card: the MMC card associated with the data transfer - * @write: flag to differentiate reads from writes - */ -void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card, - int write) -{ - unsigned int mult; - - /* - * SD cards use a 100 multiplier rather than 10 - */ - mult = mmc_card_sd(card) ? 100 : 10; - - /* - * Scale up the multiplier (and therefore the timeout) by - * the r2w factor for writes. - */ - if (write) - mult <<= card->csd.r2w_factor; - - data->timeout_ns = card->csd.tacc_ns * mult; - data->timeout_clks = card->csd.tacc_clks * mult; - - /* - * SD cards also have an upper limit on the timeout. - */ - if (mmc_card_sd(card)) { - unsigned int timeout_us, limit_us; - - timeout_us = data->timeout_ns / 1000; - timeout_us += data->timeout_clks * 1000 / - (card->host->ios.clock / 1000); - - if (write) - limit_us = 250000; - else - limit_us = 100000; - - /* - * SDHC cards always use these fixed values. - */ - if (timeout_us > limit_us || mmc_card_blockaddr(card)) { - data->timeout_ns = limit_us * 1000; - data->timeout_clks = 0; - } - } -} -EXPORT_SYMBOL(mmc_set_data_timeout); - -static int mmc_select_card(struct mmc_host *host, struct mmc_card *card); - -/** - * __mmc_claim_host - exclusively claim a host - * @host: mmc host to claim - * @card: mmc card to claim host for - * - * Claim a host for a set of operations. If a valid card - * is passed and this wasn't the last card selected, select - * the card before returning. - * - * Note: you should use mmc_card_claim_host or mmc_claim_host. - */ -int __mmc_claim_host(struct mmc_host *host, struct mmc_card *card) -{ - DECLARE_WAITQUEUE(wait, current); - unsigned long flags; - int err = 0; - - add_wait_queue(&host->wq, &wait); - spin_lock_irqsave(&host->lock, flags); - while (1) { - set_current_state(TASK_UNINTERRUPTIBLE); - if (!host->claimed) - break; - spin_unlock_irqrestore(&host->lock, flags); - schedule(); - spin_lock_irqsave(&host->lock, flags); - } - set_current_state(TASK_RUNNING); - host->claimed = 1; - spin_unlock_irqrestore(&host->lock, flags); - remove_wait_queue(&host->wq, &wait); - - if (card != (void *)-1) { - err = mmc_select_card(host, card); - if (err != MMC_ERR_NONE) - return err; - } - - return err; -} - -EXPORT_SYMBOL(__mmc_claim_host); - -/** - * mmc_release_host - release a host - * @host: mmc host to release - * - * Release a MMC host, allowing others to claim the host - * for their operations. - */ -void mmc_release_host(struct mmc_host *host) -{ - unsigned long flags; - - BUG_ON(!host->claimed); - - spin_lock_irqsave(&host->lock, flags); - host->claimed = 0; - spin_unlock_irqrestore(&host->lock, flags); - - wake_up(&host->wq); -} - -EXPORT_SYMBOL(mmc_release_host); - -static inline void mmc_set_ios(struct mmc_host *host) -{ - struct mmc_ios *ios = &host->ios; - - pr_debug("%s: clock %uHz busmode %u powermode %u cs %u Vdd %u " - "width %u timing %u\n", - mmc_hostname(host), ios->clock, ios->bus_mode, - ios->power_mode, ios->chip_select, ios->vdd, - ios->bus_width, ios->timing); - - host->ops->set_ios(host, ios); -} - -static int mmc_select_card(struct mmc_host *host, struct mmc_card *card) -{ - int err; - struct mmc_command cmd; - - BUG_ON(!host->claimed); - - if (host->card_selected == card) - return MMC_ERR_NONE; - - host->card_selected = card; - - cmd.opcode = MMC_SELECT_CARD; - cmd.arg = card->rca << 16; - cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; - - err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES); - if (err != MMC_ERR_NONE) - return err; - - /* - * We can only change the bus width of SD cards when - * they are selected so we have to put the handling - * here. - * - * The card is in 1 bit mode by default so - * we only need to change if it supports the - * wider version. - */ - if (mmc_card_sd(card) && - (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) { - - /* - * Default bus width is 1 bit. - */ - host->ios.bus_width = MMC_BUS_WIDTH_1; - - if (host->caps & MMC_CAP_4_BIT_DATA) { - struct mmc_command cmd; - cmd.opcode = SD_APP_SET_BUS_WIDTH; - cmd.arg = SD_BUS_WIDTH_4; - cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; - - err = mmc_wait_for_app_cmd(host, card->rca, &cmd, - CMD_RETRIES); - if (err != MMC_ERR_NONE) - return err; - - host->ios.bus_width = MMC_BUS_WIDTH_4; - } - } - - mmc_set_ios(host); - - return MMC_ERR_NONE; -} - -/* - * Ensure that no card is selected. - */ -static void mmc_deselect_cards(struct mmc_host *host) -{ - struct mmc_command cmd; - - if (host->card_selected) { - host->card_selected = NULL; - - cmd.opcode = MMC_SELECT_CARD; - cmd.arg = 0; - cmd.flags = MMC_RSP_NONE | MMC_CMD_AC; - - mmc_wait_for_cmd(host, &cmd, 0); - } -} - - -static inline void mmc_delay(unsigned int ms) -{ - if (ms < 1000 / HZ) { - cond_resched(); - mdelay(ms); - } else { - msleep(ms); - } -} - -/* - * Mask off any voltages we don't support and select - * the lowest voltage - */ -static u32 mmc_select_voltage(struct mmc_host *host, u32 ocr) -{ - int bit; - - ocr &= host->ocr_avail; - - bit = ffs(ocr); - if (bit) { - bit -= 1; - - ocr &= 3 << bit; - - host->ios.vdd = bit; - mmc_set_ios(host); - } else { - ocr = 0; - } - - return ocr; -} - -#define UNSTUFF_BITS(resp,start,size) \ - ({ \ - const int __size = size; \ - const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \ - const int __off = 3 - ((start) / 32); \ - const int __shft = (start) & 31; \ - u32 __res; \ - \ - __res = resp[__off] >> __shft; \ - if (__size + __shft > 32) \ - __res |= resp[__off-1] << ((32 - __shft) % 32); \ - __res & __mask; \ - }) - -/* - * Given the decoded CSD structure, decode the raw CID to our CID structure. - */ -static void mmc_decode_cid(struct mmc_card *card) -{ - u32 *resp = card->raw_cid; - - memset(&card->cid, 0, sizeof(struct mmc_cid)); - - if (mmc_card_sd(card)) { - /* - * SD doesn't currently have a version field so we will - * have to assume we can parse this. - */ - card->cid.manfid = UNSTUFF_BITS(resp, 120, 8); - card->cid.oemid = UNSTUFF_BITS(resp, 104, 16); - card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8); - card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8); - card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8); - card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8); - card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8); - card->cid.hwrev = UNSTUFF_BITS(resp, 60, 4); - card->cid.fwrev = UNSTUFF_BITS(resp, 56, 4); - card->cid.serial = UNSTUFF_BITS(resp, 24, 32); - card->cid.year = UNSTUFF_BITS(resp, 12, 8); - card->cid.month = UNSTUFF_BITS(resp, 8, 4); - - card->cid.year += 2000; /* SD cards year offset */ - } else { - /* - * The selection of the format here is based upon published - * specs from sandisk and from what people have reported. - */ - switch (card->csd.mmca_vsn) { - case 0: /* MMC v1.0 - v1.2 */ - case 1: /* MMC v1.4 */ - card->cid.manfid = UNSTUFF_BITS(resp, 104, 24); - card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8); - card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8); - card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8); - card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8); - card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8); - card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8); - card->cid.prod_name[6] = UNSTUFF_BITS(resp, 48, 8); - card->cid.hwrev = UNSTUFF_BITS(resp, 44, 4); - card->cid.fwrev = UNSTUFF_BITS(resp, 40, 4); - card->cid.serial = UNSTUFF_BITS(resp, 16, 24); - card->cid.month = UNSTUFF_BITS(resp, 12, 4); - card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997; - break; - - case 2: /* MMC v2.0 - v2.2 */ - case 3: /* MMC v3.1 - v3.3 */ - case 4: /* MMC v4 */ - card->cid.manfid = UNSTUFF_BITS(resp, 120, 8); - card->cid.oemid = UNSTUFF_BITS(resp, 104, 16); - card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8); - card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8); - card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8); - card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8); - card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8); - card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8); - card->cid.serial = UNSTUFF_BITS(resp, 16, 32); - card->cid.month = UNSTUFF_BITS(resp, 12, 4); - card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997; - break; - - default: - printk("%s: card has unknown MMCA version %d\n", - mmc_hostname(card->host), card->csd.mmca_vsn); - mmc_card_set_bad(card); - break; - } - } -} - -/* - * Given a 128-bit response, decode to our card CSD structure. - */ -static void mmc_decode_csd(struct mmc_card *card) -{ - struct mmc_csd *csd = &card->csd; - unsigned int e, m, csd_struct; - u32 *resp = card->raw_csd; - - if (mmc_card_sd(card)) { - csd_struct = UNSTUFF_BITS(resp, 126, 2); - - switch (csd_struct) { - case 0: - m = UNSTUFF_BITS(resp, 115, 4); - e = UNSTUFF_BITS(resp, 112, 3); - csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10; - csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100; - - m = UNSTUFF_BITS(resp, 99, 4); - e = UNSTUFF_BITS(resp, 96, 3); - csd->max_dtr = tran_exp[e] * tran_mant[m]; - csd->cmdclass = UNSTUFF_BITS(resp, 84, 12); - - e = UNSTUFF_BITS(resp, 47, 3); - m = UNSTUFF_BITS(resp, 62, 12); - csd->capacity = (1 + m) << (e + 2); - - csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4); - csd->read_partial = UNSTUFF_BITS(resp, 79, 1); - csd->write_misalign = UNSTUFF_BITS(resp, 78, 1); - csd->read_misalign = UNSTUFF_BITS(resp, 77, 1); - csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3); - csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4); - csd->write_partial = UNSTUFF_BITS(resp, 21, 1); - break; - case 1: - /* - * This is a block-addressed SDHC card. Most - * interesting fields are unused and have fixed - * values. To avoid getting tripped by buggy cards, - * we assume those fixed values ourselves. - */ - mmc_card_set_blockaddr(card); - - csd->tacc_ns = 0; /* Unused */ - csd->tacc_clks = 0; /* Unused */ - - m = UNSTUFF_BITS(resp, 99, 4); - e = UNSTUFF_BITS(resp, 96, 3); - csd->max_dtr = tran_exp[e] * tran_mant[m]; - csd->cmdclass = UNSTUFF_BITS(resp, 84, 12); - - m = UNSTUFF_BITS(resp, 48, 22); - csd->capacity = (1 + m) << 10; - - csd->read_blkbits = 9; - csd->read_partial = 0; - csd->write_misalign = 0; - csd->read_misalign = 0; - csd->r2w_factor = 4; /* Unused */ - csd->write_blkbits = 9; - csd->write_partial = 0; - break; - default: - printk("%s: unrecognised CSD structure version %d\n", - mmc_hostname(card->host), csd_struct); - mmc_card_set_bad(card); - return; - } - } else { - /* - * We only understand CSD structure v1.1 and v1.2. - * v1.2 has extra information in bits 15, 11 and 10. - */ - csd_struct = UNSTUFF_BITS(resp, 126, 2); - if (csd_struct != 1 && csd_struct != 2) { - printk("%s: unrecognised CSD structure version %d\n", - mmc_hostname(card->host), csd_struct); - mmc_card_set_bad(card); - return; - } - - csd->mmca_vsn = UNSTUFF_BITS(resp, 122, 4); - m = UNSTUFF_BITS(resp, 115, 4); - e = UNSTUFF_BITS(resp, 112, 3); - csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10; - csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100; - - m = UNSTUFF_BITS(resp, 99, 4); - e = UNSTUFF_BITS(resp, 96, 3); - csd->max_dtr = tran_exp[e] * tran_mant[m]; - csd->cmdclass = UNSTUFF_BITS(resp, 84, 12); - - e = UNSTUFF_BITS(resp, 47, 3); - m = UNSTUFF_BITS(resp, 62, 12); - csd->capacity = (1 + m) << (e + 2); - - csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4); - csd->read_partial = UNSTUFF_BITS(resp, 79, 1); - csd->write_misalign = UNSTUFF_BITS(resp, 78, 1); - csd->read_misalign = UNSTUFF_BITS(resp, 77, 1); - csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3); - csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4); - csd->write_partial = UNSTUFF_BITS(resp, 21, 1); - } -} - -/* - * Given a 64-bit response, decode to our card SCR structure. - */ -static void mmc_decode_scr(struct mmc_card *card) -{ - struct sd_scr *scr = &card->scr; - unsigned int scr_struct; - u32 resp[4]; - - BUG_ON(!mmc_card_sd(card)); - - resp[3] = card->raw_scr[1]; - resp[2] = card->raw_scr[0]; - - scr_struct = UNSTUFF_BITS(resp, 60, 4); - if (scr_struct != 0) { - printk("%s: unrecognised SCR structure version %d\n", - mmc_hostname(card->host), scr_struct); - mmc_card_set_bad(card); - return; - } - - scr->sda_vsn = UNSTUFF_BITS(resp, 56, 4); - scr->bus_widths = UNSTUFF_BITS(resp, 48, 4); -} - -/* - * Locate a MMC card on this MMC host given a raw CID. - */ -static struct mmc_card *mmc_find_card(struct mmc_host *host, u32 *raw_cid) -{ - struct mmc_card *card; - - list_for_each_entry(card, &host->cards, node) { - if (memcmp(card->raw_cid, raw_cid, sizeof(card->raw_cid)) == 0) - return card; - } - return NULL; -} - -/* - * Allocate a new MMC card, and assign a unique RCA. - */ -static struct mmc_card * -mmc_alloc_card(struct mmc_host *host, u32 *raw_cid, unsigned int *frca) -{ - struct mmc_card *card, *c; - unsigned int rca = *frca; - - card = kmalloc(sizeof(struct mmc_card), GFP_KERNEL); - if (!card) - return ERR_PTR(-ENOMEM); - - mmc_init_card(card, host); - memcpy(card->raw_cid, raw_cid, sizeof(card->raw_cid)); - - again: - list_for_each_entry(c, &host->cards, node) - if (c->rca == rca) { - rca++; - goto again; - } - - card->rca = rca; - - *frca = rca; - - return card; -} - -/* - * Tell attached cards to go to IDLE state - */ -static void mmc_idle_cards(struct mmc_host *host) -{ - struct mmc_command cmd; - - host->ios.chip_select = MMC_CS_HIGH; - mmc_set_ios(host); - - mmc_delay(1); - - cmd.opcode = MMC_GO_IDLE_STATE; - cmd.arg = 0; - cmd.flags = MMC_RSP_NONE | MMC_CMD_BC; - - mmc_wait_for_cmd(host, &cmd, 0); - - mmc_delay(1); - - host->ios.chip_select = MMC_CS_DONTCARE; - mmc_set_ios(host); - - mmc_delay(1); -} - -/* - * Apply power to the MMC stack. This is a two-stage process. - * First, we enable power to the card without the clock running. - * We then wait a bit for the power to stabilise. Finally, - * enable the bus drivers and clock to the card. - * - * We must _NOT_ enable the clock prior to power stablising. - * - * If a host does all the power sequencing itself, ignore the - * initial MMC_POWER_UP stage. - */ -static void mmc_power_up(struct mmc_host *host) -{ - int bit = fls(host->ocr_avail) - 1; - - host->ios.vdd = bit; - host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN; - host->ios.chip_select = MMC_CS_DONTCARE; - host->ios.power_mode = MMC_POWER_UP; - host->ios.bus_width = MMC_BUS_WIDTH_1; - host->ios.timing = MMC_TIMING_LEGACY; - mmc_set_ios(host); - - mmc_delay(1); - - host->ios.clock = host->f_min; - host->ios.power_mode = MMC_POWER_ON; - mmc_set_ios(host); - - mmc_delay(2); -} - -static void mmc_power_off(struct mmc_host *host) -{ - host->ios.clock = 0; - host->ios.vdd = 0; - host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN; - host->ios.chip_select = MMC_CS_DONTCARE; - host->ios.power_mode = MMC_POWER_OFF; - host->ios.bus_width = MMC_BUS_WIDTH_1; - host->ios.timing = MMC_TIMING_LEGACY; - mmc_set_ios(host); -} - -static int mmc_send_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr) -{ - struct mmc_command cmd; - int i, err = 0; - - cmd.opcode = MMC_SEND_OP_COND; - cmd.arg = ocr; - cmd.flags = MMC_RSP_R3 | MMC_CMD_BCR; - - for (i = 100; i; i--) { - err = mmc_wait_for_cmd(host, &cmd, 0); - if (err != MMC_ERR_NONE) - break; - - if (cmd.resp[0] & MMC_CARD_BUSY || ocr == 0) - break; - - err = MMC_ERR_TIMEOUT; - - mmc_delay(10); - } - - if (rocr) - *rocr = cmd.resp[0]; - - return err; -} - -static int mmc_send_app_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr) -{ - struct mmc_command cmd; - int i, err = 0; - - cmd.opcode = SD_APP_OP_COND; - cmd.arg = ocr; - cmd.flags = MMC_RSP_R3 | MMC_CMD_BCR; - - for (i = 100; i; i--) { - err = mmc_wait_for_app_cmd(host, 0, &cmd, CMD_RETRIES); - if (err != MMC_ERR_NONE) - break; - - if (cmd.resp[0] & MMC_CARD_BUSY || ocr == 0) - break; - - err = MMC_ERR_TIMEOUT; - - mmc_delay(10); - } - - if (rocr) - *rocr = cmd.resp[0]; - - return err; -} - -static int mmc_send_if_cond(struct mmc_host *host, u32 ocr, int *rsd2) -{ - struct mmc_command cmd; - int err, sd2; - static const u8 test_pattern = 0xAA; - - /* - * To support SD 2.0 cards, we must always invoke SD_SEND_IF_COND - * before SD_APP_OP_COND. This command will harmlessly fail for - * SD 1.0 cards. - */ - cmd.opcode = SD_SEND_IF_COND; - cmd.arg = ((ocr & 0xFF8000) != 0) << 8 | test_pattern; - cmd.flags = MMC_RSP_R7 | MMC_CMD_BCR; - - err = mmc_wait_for_cmd(host, &cmd, 0); - if (err == MMC_ERR_NONE) { - if ((cmd.resp[0] & 0xFF) == test_pattern) { - sd2 = 1; - } else { - sd2 = 0; - err = MMC_ERR_FAILED; - } - } else { - /* - * Treat errors as SD 1.0 card. - */ - sd2 = 0; - err = MMC_ERR_NONE; - } - if (rsd2) - *rsd2 = sd2; - return err; -} - -/* - * Discover cards by requesting their CID. If this command - * times out, it is not an error; there are no further cards - * to be discovered. Add new cards to the list. - * - * Create a mmc_card entry for each discovered card, assigning - * it an RCA, and save the raw CID for decoding later. - */ -static void mmc_discover_cards(struct mmc_host *host) -{ - struct mmc_card *card; - unsigned int first_rca = 1, err; - - while (1) { - struct mmc_command cmd; - - cmd.opcode = MMC_ALL_SEND_CID; - cmd.arg = 0; - cmd.flags = MMC_RSP_R2 | MMC_CMD_BCR; - - err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES); - if (err == MMC_ERR_TIMEOUT) { - err = MMC_ERR_NONE; - break; - } - if (err != MMC_ERR_NONE) { - printk(KERN_ERR "%s: error requesting CID: %d\n", - mmc_hostname(host), err); - break; - } - - card = mmc_find_card(host, cmd.resp); - if (!card) { - card = mmc_alloc_card(host, cmd.resp, &first_rca); - if (IS_ERR(card)) { - err = PTR_ERR(card); - break; - } - list_add(&card->node, &host->cards); - } - - card->state &= ~MMC_STATE_DEAD; - - if (host->mode == MMC_MODE_SD) { - mmc_card_set_sd(card); - - cmd.opcode = SD_SEND_RELATIVE_ADDR; - cmd.arg = 0; - cmd.flags = MMC_RSP_R6 | MMC_CMD_BCR; - - err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES); - if (err != MMC_ERR_NONE) - mmc_card_set_dead(card); - else { - card->rca = cmd.resp[0] >> 16; - - if (!host->ops->get_ro) { - printk(KERN_WARNING "%s: host does not " - "support reading read-only " - "switch. assuming write-enable.\n", - mmc_hostname(host)); - } else { - if (host->ops->get_ro(host)) - mmc_card_set_readonly(card); - } - } - } else { - cmd.opcode = MMC_SET_RELATIVE_ADDR; - cmd.arg = card->rca << 16; - cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; - - err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES); - if (err != MMC_ERR_NONE) - mmc_card_set_dead(card); - } - } -} - -static void mmc_read_csds(struct mmc_host *host) -{ - struct mmc_card *card; - - list_for_each_entry(card, &host->cards, node) { - struct mmc_command cmd; - int err; - - if (card->state & (MMC_STATE_DEAD|MMC_STATE_PRESENT)) - continue; - - cmd.opcode = MMC_SEND_CSD; - cmd.arg = card->rca << 16; - cmd.flags = MMC_RSP_R2 | MMC_CMD_AC; - - err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES); - if (err != MMC_ERR_NONE) { - mmc_card_set_dead(card); - continue; - } - - memcpy(card->raw_csd, cmd.resp, sizeof(card->raw_csd)); - - mmc_decode_csd(card); - mmc_decode_cid(card); - } -} - -static void mmc_process_ext_csds(struct mmc_host *host) -{ - int err; - struct mmc_card *card; - - struct mmc_request mrq; - struct mmc_command cmd; - struct mmc_data data; - - struct scatterlist sg; - - /* - * As the ext_csd is so large and mostly unused, we don't store the - * raw block in mmc_card. - */ - u8 *ext_csd; - ext_csd = kmalloc(512, GFP_KERNEL); - if (!ext_csd) { - printk("%s: could not allocate a buffer to receive the ext_csd." - "mmc v4 cards will be treated as v3.\n", - mmc_hostname(host)); - return; - } - - list_for_each_entry(card, &host->cards, node) { - if (card->state & (MMC_STATE_DEAD|MMC_STATE_PRESENT)) - continue; - if (mmc_card_sd(card)) - continue; - if (card->csd.mmca_vsn < CSD_SPEC_VER_4) - continue; - - err = mmc_select_card(host, card); - if (err != MMC_ERR_NONE) { - mmc_card_set_dead(card); - continue; - } - - memset(&cmd, 0, sizeof(struct mmc_command)); - - cmd.opcode = MMC_SEND_EXT_CSD; - cmd.arg = 0; - cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; - - memset(&data, 0, sizeof(struct mmc_data)); - - mmc_set_data_timeout(&data, card, 0); - - data.blksz = 512; - data.blocks = 1; - data.flags = MMC_DATA_READ; - data.sg = &sg; - data.sg_len = 1; - - memset(&mrq, 0, sizeof(struct mmc_request)); - - mrq.cmd = &cmd; - mrq.data = &data; - - sg_init_one(&sg, ext_csd, 512); - - mmc_wait_for_req(host, &mrq); - - if (cmd.error != MMC_ERR_NONE || data.error != MMC_ERR_NONE) { - printk("%s: unable to read EXT_CSD, performance " - "might suffer.\n", mmc_hostname(card->host)); - continue; - } - - switch (ext_csd[EXT_CSD_CARD_TYPE]) { - case EXT_CSD_CARD_TYPE_52 | EXT_CSD_CARD_TYPE_26: - card->ext_csd.hs_max_dtr = 52000000; - break; - case EXT_CSD_CARD_TYPE_26: - card->ext_csd.hs_max_dtr = 26000000; - break; - default: - /* MMC v4 spec says this cannot happen */ - printk("%s: card is mmc v4 but doesn't support " - "any high-speed modes.\n", - mmc_hostname(card->host)); - continue; - } - - if (host->caps & MMC_CAP_MMC_HIGHSPEED) { - /* Activate highspeed support. */ - cmd.opcode = MMC_SWITCH; - cmd.arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) | - (EXT_CSD_HS_TIMING << 16) | - (1 << 8) | - EXT_CSD_CMD_SET_NORMAL; - cmd.flags = MMC_RSP_R1B | MMC_CMD_AC; - - err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES); - if (err != MMC_ERR_NONE) { - printk("%s: failed to switch card to mmc v4 " - "high-speed mode.\n", - mmc_hostname(card->host)); - continue; - } - - mmc_card_set_highspeed(card); - - host->ios.timing = MMC_TIMING_SD_HS; - mmc_set_ios(host); - } - - /* Check for host support for wide-bus modes. */ - if (host->caps & MMC_CAP_4_BIT_DATA) { - /* Activate 4-bit support. */ - cmd.opcode = MMC_SWITCH; - cmd.arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) | - (EXT_CSD_BUS_WIDTH << 16) | - (EXT_CSD_BUS_WIDTH_4 << 8) | - EXT_CSD_CMD_SET_NORMAL; - cmd.flags = MMC_RSP_R1B | MMC_CMD_AC; - - err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES); - if (err != MMC_ERR_NONE) { - printk("%s: failed to switch card to " - "mmc v4 4-bit bus mode.\n", - mmc_hostname(card->host)); - continue; - } - - host->ios.bus_width = MMC_BUS_WIDTH_4; - mmc_set_ios(host); - } - } - - kfree(ext_csd); - - mmc_deselect_cards(host); -} - -static void mmc_read_scrs(struct mmc_host *host) -{ - int err; - struct mmc_card *card; - struct mmc_request mrq; - struct mmc_command cmd; - struct mmc_data data; - struct scatterlist sg; - - list_for_each_entry(card, &host->cards, node) { - if (card->state & (MMC_STATE_DEAD|MMC_STATE_PRESENT)) - continue; - if (!mmc_card_sd(card)) - continue; - - err = mmc_select_card(host, card); - if (err != MMC_ERR_NONE) { - mmc_card_set_dead(card); - continue; - } - - memset(&cmd, 0, sizeof(struct mmc_command)); - - cmd.opcode = MMC_APP_CMD; - cmd.arg = card->rca << 16; - cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; - - err = mmc_wait_for_cmd(host, &cmd, 0); - if ((err != MMC_ERR_NONE) || !(cmd.resp[0] & R1_APP_CMD)) { - mmc_card_set_dead(card); - continue; - } - - memset(&cmd, 0, sizeof(struct mmc_command)); - - cmd.opcode = SD_APP_SEND_SCR; - cmd.arg = 0; - cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; - - memset(&data, 0, sizeof(struct mmc_data)); - - mmc_set_data_timeout(&data, card, 0); - - data.blksz = 1 << 3; - data.blocks = 1; - data.flags = MMC_DATA_READ; - data.sg = &sg; - data.sg_len = 1; - - memset(&mrq, 0, sizeof(struct mmc_request)); - - mrq.cmd = &cmd; - mrq.data = &data; - - sg_init_one(&sg, (u8*)card->raw_scr, 8); - - mmc_wait_for_req(host, &mrq); - - if (cmd.error != MMC_ERR_NONE || data.error != MMC_ERR_NONE) { - mmc_card_set_dead(card); - continue; - } - - card->raw_scr[0] = ntohl(card->raw_scr[0]); - card->raw_scr[1] = ntohl(card->raw_scr[1]); - - mmc_decode_scr(card); - } - - mmc_deselect_cards(host); -} - -static void mmc_read_switch_caps(struct mmc_host *host) -{ - int err; - struct mmc_card *card; - struct mmc_request mrq; - struct mmc_command cmd; - struct mmc_data data; - unsigned char *status; - struct scatterlist sg; - - if (!(host->caps & MMC_CAP_SD_HIGHSPEED)) - return; - - status = kmalloc(64, GFP_KERNEL); - if (!status) { - printk(KERN_WARNING "%s: Unable to allocate buffer for " - "reading switch capabilities.\n", - mmc_hostname(host)); - return; - } - - list_for_each_entry(card, &host->cards, node) { - if (card->state & (MMC_STATE_DEAD|MMC_STATE_PRESENT)) - continue; - if (!mmc_card_sd(card)) - continue; - if (card->scr.sda_vsn < SCR_SPEC_VER_1) - continue; - - err = mmc_select_card(host, card); - if (err != MMC_ERR_NONE) { - mmc_card_set_dead(card); - continue; - } - - memset(&cmd, 0, sizeof(struct mmc_command)); - - cmd.opcode = SD_SWITCH; - cmd.arg = 0x00FFFFF1; - cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; - - memset(&data, 0, sizeof(struct mmc_data)); - - mmc_set_data_timeout(&data, card, 0); - - data.blksz = 64; - data.blocks = 1; - data.flags = MMC_DATA_READ; - data.sg = &sg; - data.sg_len = 1; - - memset(&mrq, 0, sizeof(struct mmc_request)); - - mrq.cmd = &cmd; - mrq.data = &data; - - sg_init_one(&sg, status, 64); - - mmc_wait_for_req(host, &mrq); - - if (cmd.error != MMC_ERR_NONE || data.error != MMC_ERR_NONE) { - printk("%s: unable to read switch capabilities, " - "performance might suffer.\n", - mmc_hostname(card->host)); - continue; - } - - if (status[13] & 0x02) - card->sw_caps.hs_max_dtr = 50000000; - - memset(&cmd, 0, sizeof(struct mmc_command)); - - cmd.opcode = SD_SWITCH; - cmd.arg = 0x80FFFFF1; - cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; - - memset(&data, 0, sizeof(struct mmc_data)); - - mmc_set_data_timeout(&data, card, 0); - - data.blksz = 64; - data.blocks = 1; - data.flags = MMC_DATA_READ; - data.sg = &sg; - data.sg_len = 1; - - memset(&mrq, 0, sizeof(struct mmc_request)); - - mrq.cmd = &cmd; - mrq.data = &data; - - sg_init_one(&sg, status, 64); - - mmc_wait_for_req(host, &mrq); - - if (cmd.error != MMC_ERR_NONE || data.error != MMC_ERR_NONE || - (status[16] & 0xF) != 1) { - printk(KERN_WARNING "%s: Problem switching card " - "into high-speed mode!\n", - mmc_hostname(host)); - continue; - } - - mmc_card_set_highspeed(card); - - host->ios.timing = MMC_TIMING_SD_HS; - mmc_set_ios(host); - } - - kfree(status); - - mmc_deselect_cards(host); -} - -static unsigned int mmc_calculate_clock(struct mmc_host *host) -{ - struct mmc_card *card; - unsigned int max_dtr = host->f_max; - - list_for_each_entry(card, &host->cards, node) - if (!mmc_card_dead(card)) { - if (mmc_card_highspeed(card) && mmc_card_sd(card)) { - if (max_dtr > card->sw_caps.hs_max_dtr) - max_dtr = card->sw_caps.hs_max_dtr; - } else if (mmc_card_highspeed(card) && !mmc_card_sd(card)) { - if (max_dtr > card->ext_csd.hs_max_dtr) - max_dtr = card->ext_csd.hs_max_dtr; - } else if (max_dtr > card->csd.max_dtr) { - max_dtr = card->csd.max_dtr; - } - } - - pr_debug("%s: selected %d.%03dMHz transfer rate\n", - mmc_hostname(host), - max_dtr / 1000000, (max_dtr / 1000) % 1000); - - return max_dtr; -} - -/* - * Check whether cards we already know about are still present. - * We do this by requesting status, and checking whether a card - * responds. - * - * A request for status does not cause a state change in data - * transfer mode. - */ -static void mmc_check_cards(struct mmc_host *host) -{ - struct list_head *l, *n; - - mmc_deselect_cards(host); - - list_for_each_safe(l, n, &host->cards) { - struct mmc_card *card = mmc_list_to_card(l); - struct mmc_command cmd; - int err; - - cmd.opcode = MMC_SEND_STATUS; - cmd.arg = card->rca << 16; - cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; - - err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES); - if (err == MMC_ERR_NONE) - continue; - - mmc_card_set_dead(card); - } -} - -static void mmc_setup(struct mmc_host *host) -{ - if (host->ios.power_mode != MMC_POWER_ON) { - int err; - u32 ocr; - - host->mode = MMC_MODE_SD; - - mmc_power_up(host); - mmc_idle_cards(host); - - err = mmc_send_if_cond(host, host->ocr_avail, NULL); - if (err != MMC_ERR_NONE) { - return; - } - err = mmc_send_app_op_cond(host, 0, &ocr); - - /* - * If we fail to detect any SD cards then try - * searching for MMC cards. - */ - if (err != MMC_ERR_NONE) { - host->mode = MMC_MODE_MMC; - - err = mmc_send_op_cond(host, 0, &ocr); - if (err != MMC_ERR_NONE) - return; - } - - host->ocr = mmc_select_voltage(host, ocr); - - /* - * Since we're changing the OCR value, we seem to - * need to tell some cards to go back to the idle - * state. We wait 1ms to give cards time to - * respond. - */ - if (host->ocr) - mmc_idle_cards(host); - } else { - host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN; - host->ios.clock = host->f_min; - mmc_set_ios(host); - - /* - * We should remember the OCR mask from the existing - * cards, and detect the new cards OCR mask, combine - * the two and re-select the VDD. However, if we do - * change VDD, we should do an idle, and then do a - * full re-initialisation. We would need to notify - * drivers so that they can re-setup the cards as - * well, while keeping their queues at bay. - * - * For the moment, we take the easy way out - if the - * new cards don't like our currently selected VDD, - * they drop off the bus. - */ - } - - if (host->ocr == 0) - return; - - /* - * Send the selected OCR multiple times... until the cards - * all get the idea that they should be ready for CMD2. - * (My SanDisk card seems to need this.) - */ - if (host->mode == MMC_MODE_SD) { - int err, sd2; - err = mmc_send_if_cond(host, host->ocr, &sd2); - if (err == MMC_ERR_NONE) { - /* - * If SD_SEND_IF_COND indicates an SD 2.0 - * compliant card and we should set bit 30 - * of the ocr to indicate that we can handle - * block-addressed SDHC cards. - */ - mmc_send_app_op_cond(host, host->ocr | (sd2 << 30), NULL); - } - } else { - mmc_send_op_cond(host, host->ocr, NULL); - } - - mmc_discover_cards(host); - - /* - * Ok, now switch to push-pull mode. - */ - host->ios.bus_mode = MMC_BUSMODE_PUSHPULL; - mmc_set_ios(host); - - mmc_read_csds(host); - - if (host->mode == MMC_MODE_SD) { - mmc_read_scrs(host); - mmc_read_switch_caps(host); - } else - mmc_process_ext_csds(host); -} - - -/** - * mmc_detect_change - process change of state on a MMC socket - * @host: host which changed state. - * @delay: optional delay to wait before detection (jiffies) - * - * All we know is that card(s) have been inserted or removed - * from the socket(s). We don't know which socket or cards. - */ -void mmc_detect_change(struct mmc_host *host, unsigned long delay) -{ - mmc_schedule_delayed_work(&host->detect, delay); -} - -EXPORT_SYMBOL(mmc_detect_change); - - -static void mmc_rescan(struct work_struct *work) -{ - struct mmc_host *host = - container_of(work, struct mmc_host, detect.work); - struct list_head *l, *n; - unsigned char power_mode; - - mmc_claim_host(host); - - /* - * Check for removed cards and newly inserted ones. We check for - * removed cards first so we can intelligently re-select the VDD. - */ - power_mode = host->ios.power_mode; - if (power_mode == MMC_POWER_ON) - mmc_check_cards(host); - - mmc_setup(host); - - /* - * Some broken cards process CMD1 even in stand-by state. There is - * no reply, but an ILLEGAL_COMMAND error is cached and returned - * after next command. We poll for card status here to clear any - * possibly pending error. - */ - if (power_mode == MMC_POWER_ON) - mmc_check_cards(host); - - if (!list_empty(&host->cards)) { - /* - * (Re-)calculate the fastest clock rate which the - * attached cards and the host support. - */ - host->ios.clock = mmc_calculate_clock(host); - mmc_set_ios(host); - } - - mmc_release_host(host); - - list_for_each_safe(l, n, &host->cards) { - struct mmc_card *card = mmc_list_to_card(l); - - /* - * If this is a new and good card, register it. - */ - if (!mmc_card_present(card) && !mmc_card_dead(card)) { - if (mmc_register_card(card)) - mmc_card_set_dead(card); - else - mmc_card_set_present(card); - } - - /* - * If this card is dead, destroy it. - */ - if (mmc_card_dead(card)) { - list_del(&card->node); - mmc_remove_card(card); - } - } - - /* - * If we discover that there are no cards on the - * bus, turn off the clock and power down. - */ - if (list_empty(&host->cards)) - mmc_power_off(host); -} - - -/** - * mmc_alloc_host - initialise the per-host structure. - * @extra: sizeof private data structure - * @dev: pointer to host device model structure - * - * Initialise the per-host structure. - */ -struct mmc_host *mmc_alloc_host(int extra, struct device *dev) -{ - struct mmc_host *host; - - host = mmc_alloc_host_sysfs(extra, dev); - if (host) { - spin_lock_init(&host->lock); - init_waitqueue_head(&host->wq); - INIT_LIST_HEAD(&host->cards); - INIT_DELAYED_WORK(&host->detect, mmc_rescan); - - /* - * By default, hosts do not support SGIO or large requests. - * They have to set these according to their abilities. - */ - host->max_hw_segs = 1; - host->max_phys_segs = 1; - host->max_seg_size = PAGE_CACHE_SIZE; - - host->max_req_size = PAGE_CACHE_SIZE; - host->max_blk_size = 512; - host->max_blk_count = PAGE_CACHE_SIZE / 512; - } - - return host; -} - -EXPORT_SYMBOL(mmc_alloc_host); - -/** - * mmc_add_host - initialise host hardware - * @host: mmc host - */ -int mmc_add_host(struct mmc_host *host) -{ - int ret; - - ret = mmc_add_host_sysfs(host); - if (ret == 0) { - mmc_power_off(host); - mmc_detect_change(host, 0); - } - - return ret; -} - -EXPORT_SYMBOL(mmc_add_host); - -/** - * mmc_remove_host - remove host hardware - * @host: mmc host - * - * Unregister and remove all cards associated with this host, - * and power down the MMC bus. - */ -void mmc_remove_host(struct mmc_host *host) -{ - struct list_head *l, *n; - - list_for_each_safe(l, n, &host->cards) { - struct mmc_card *card = mmc_list_to_card(l); - - mmc_remove_card(card); - } - - mmc_power_off(host); - mmc_remove_host_sysfs(host); -} - -EXPORT_SYMBOL(mmc_remove_host); - -/** - * mmc_free_host - free the host structure - * @host: mmc host - * - * Free the host once all references to it have been dropped. - */ -void mmc_free_host(struct mmc_host *host) -{ - mmc_flush_scheduled_work(); - mmc_free_host_sysfs(host); -} - -EXPORT_SYMBOL(mmc_free_host); - -#ifdef CONFIG_PM - -/** - * mmc_suspend_host - suspend a host - * @host: mmc host - * @state: suspend mode (PM_SUSPEND_xxx) - */ -int mmc_suspend_host(struct mmc_host *host, pm_message_t state) -{ - mmc_claim_host(host); - mmc_deselect_cards(host); - mmc_power_off(host); - mmc_release_host(host); - - return 0; -} - -EXPORT_SYMBOL(mmc_suspend_host); - -/** - * mmc_resume_host - resume a previously suspended host - * @host: mmc host - */ -int mmc_resume_host(struct mmc_host *host) -{ - mmc_rescan(&host->detect.work); - - return 0; -} - -EXPORT_SYMBOL(mmc_resume_host); - -#endif - -MODULE_LICENSE("GPL"); diff --git a/drivers/mmc/tifm_sd.c b/drivers/mmc/tifm_sd.c deleted file mode 100644 index 0581d09c58f..00000000000 --- a/drivers/mmc/tifm_sd.c +++ /dev/null @@ -1,987 +0,0 @@ -/* - * tifm_sd.c - TI FlashMedia driver - * - * Copyright (C) 2006 Alex Dubov <oakad@yahoo.com> - * - * 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. - * - */ - - -#include <linux/tifm.h> -#include <linux/mmc/protocol.h> -#include <linux/mmc/host.h> -#include <linux/highmem.h> -#include <asm/io.h> - -#define DRIVER_NAME "tifm_sd" -#define DRIVER_VERSION "0.7" - -static int no_dma = 0; -static int fixed_timeout = 0; -module_param(no_dma, bool, 0644); -module_param(fixed_timeout, bool, 0644); - -/* Constants here are mostly from OMAP5912 datasheet */ -#define TIFM_MMCSD_RESET 0x0002 -#define TIFM_MMCSD_CLKMASK 0x03ff -#define TIFM_MMCSD_POWER 0x0800 -#define TIFM_MMCSD_4BBUS 0x8000 -#define TIFM_MMCSD_RXDE 0x8000 /* rx dma enable */ -#define TIFM_MMCSD_TXDE 0x0080 /* tx dma enable */ -#define TIFM_MMCSD_BUFINT 0x0c00 /* set bits: AE, AF */ -#define TIFM_MMCSD_DPE 0x0020 /* data timeout counted in kilocycles */ -#define TIFM_MMCSD_INAB 0x0080 /* abort / initialize command */ -#define TIFM_MMCSD_READ 0x8000 - -#define TIFM_MMCSD_DATAMASK 0x401d /* set bits: CERR, EOFB, BRS, CB, EOC */ -#define TIFM_MMCSD_ERRMASK 0x01e0 /* set bits: CCRC, CTO, DCRC, DTO */ -#define TIFM_MMCSD_EOC 0x0001 /* end of command phase */ -#define TIFM_MMCSD_CB 0x0004 /* card enter busy state */ -#define TIFM_MMCSD_BRS 0x0008 /* block received/sent */ -#define TIFM_MMCSD_EOFB 0x0010 /* card exit busy state */ -#define TIFM_MMCSD_DTO 0x0020 /* data time-out */ -#define TIFM_MMCSD_DCRC 0x0040 /* data crc error */ -#define TIFM_MMCSD_CTO 0x0080 /* command time-out */ -#define TIFM_MMCSD_CCRC 0x0100 /* command crc error */ -#define TIFM_MMCSD_AF 0x0400 /* fifo almost full */ -#define TIFM_MMCSD_AE 0x0800 /* fifo almost empty */ -#define TIFM_MMCSD_CERR 0x4000 /* card status error */ - -#define TIFM_MMCSD_FIFO_SIZE 0x0020 - -#define TIFM_MMCSD_RSP_R0 0x0000 -#define TIFM_MMCSD_RSP_R1 0x0100 -#define TIFM_MMCSD_RSP_R2 0x0200 -#define TIFM_MMCSD_RSP_R3 0x0300 -#define TIFM_MMCSD_RSP_R4 0x0400 -#define TIFM_MMCSD_RSP_R5 0x0500 -#define TIFM_MMCSD_RSP_R6 0x0600 - -#define TIFM_MMCSD_RSP_BUSY 0x0800 - -#define TIFM_MMCSD_CMD_BC 0x0000 -#define TIFM_MMCSD_CMD_BCR 0x1000 -#define TIFM_MMCSD_CMD_AC 0x2000 -#define TIFM_MMCSD_CMD_ADTC 0x3000 - -typedef enum { - IDLE = 0, - CMD, /* main command ended */ - BRS, /* block transfer finished */ - SCMD, /* stop command ended */ - CARD, /* card left busy state */ - FIFO, /* FIFO operation completed (uncertain) */ - READY -} card_state_t; - -enum { - FIFO_RDY = 0x0001, /* hardware dependent value */ - EJECT = 0x0004, - EJECT_DONE = 0x0008, - CARD_BUSY = 0x0010, - OPENDRAIN = 0x0040, /* hardware dependent value */ - CARD_EVENT = 0x0100, /* hardware dependent value */ - CARD_RO = 0x0200, /* hardware dependent value */ - FIFO_EVENT = 0x10000 }; /* hardware dependent value */ - -struct tifm_sd { - struct tifm_dev *dev; - - unsigned int flags; - card_state_t state; - unsigned int clk_freq; - unsigned int clk_div; - unsigned long timeout_jiffies; - - struct tasklet_struct finish_tasklet; - struct timer_list timer; - struct mmc_request *req; - wait_queue_head_t notify; - - size_t written_blocks; - size_t buffer_size; - size_t buffer_pos; - -}; - -static char* tifm_sd_data_buffer(struct mmc_data *data) -{ - return page_address(data->sg->page) + data->sg->offset; -} - -static int tifm_sd_transfer_data(struct tifm_dev *sock, struct tifm_sd *host, - unsigned int host_status) -{ - struct mmc_command *cmd = host->req->cmd; - unsigned int t_val = 0, cnt = 0; - char *buffer; - - if (host_status & TIFM_MMCSD_BRS) { - /* in non-dma rx mode BRS fires when fifo is still not empty */ - if (no_dma && (cmd->data->flags & MMC_DATA_READ)) { - buffer = tifm_sd_data_buffer(host->req->data); - while (host->buffer_size > host->buffer_pos) { - t_val = readl(sock->addr + SOCK_MMCSD_DATA); - buffer[host->buffer_pos++] = t_val & 0xff; - buffer[host->buffer_pos++] = - (t_val >> 8) & 0xff; - } - } - return 1; - } else if (no_dma) { - buffer = tifm_sd_data_buffer(host->req->data); - if ((cmd->data->flags & MMC_DATA_READ) && - (host_status & TIFM_MMCSD_AF)) { - for (cnt = 0; cnt < TIFM_MMCSD_FIFO_SIZE; cnt++) { - t_val = readl(sock->addr + SOCK_MMCSD_DATA); - if (host->buffer_size > host->buffer_pos) { - buffer[host->buffer_pos++] = - t_val & 0xff; - buffer[host->buffer_pos++] = - (t_val >> 8) & 0xff; - } - } - } else if ((cmd->data->flags & MMC_DATA_WRITE) - && (host_status & TIFM_MMCSD_AE)) { - for (cnt = 0; cnt < TIFM_MMCSD_FIFO_SIZE; cnt++) { - if (host->buffer_size > host->buffer_pos) { - t_val = buffer[host->buffer_pos++] - & 0x00ff; - t_val |= ((buffer[host->buffer_pos++]) - << 8) & 0xff00; - writel(t_val, - sock->addr + SOCK_MMCSD_DATA); - } - } - } - } - return 0; -} - -static unsigned int tifm_sd_op_flags(struct mmc_command *cmd) -{ - unsigned int rc = 0; - - switch (mmc_resp_type(cmd)) { - case MMC_RSP_NONE: - rc |= TIFM_MMCSD_RSP_R0; - break; - case MMC_RSP_R1B: - rc |= TIFM_MMCSD_RSP_BUSY; // deliberate fall-through - case MMC_RSP_R1: - rc |= TIFM_MMCSD_RSP_R1; - break; - case MMC_RSP_R2: - rc |= TIFM_MMCSD_RSP_R2; - break; - case MMC_RSP_R3: - rc |= TIFM_MMCSD_RSP_R3; - break; - default: - BUG(); - } - - switch (mmc_cmd_type(cmd)) { - case MMC_CMD_BC: - rc |= TIFM_MMCSD_CMD_BC; - break; - case MMC_CMD_BCR: - rc |= TIFM_MMCSD_CMD_BCR; - break; - case MMC_CMD_AC: - rc |= TIFM_MMCSD_CMD_AC; - break; - case MMC_CMD_ADTC: - rc |= TIFM_MMCSD_CMD_ADTC; - break; - default: - BUG(); - } - return rc; -} - -static void tifm_sd_exec(struct tifm_sd *host, struct mmc_command *cmd) -{ - struct tifm_dev *sock = host->dev; - unsigned int cmd_mask = tifm_sd_op_flags(cmd) | - (host->flags & OPENDRAIN); - - if (cmd->data && (cmd->data->flags & MMC_DATA_READ)) - cmd_mask |= TIFM_MMCSD_READ; - - dev_dbg(&sock->dev, "executing opcode 0x%x, arg: 0x%x, mask: 0x%x\n", - cmd->opcode, cmd->arg, cmd_mask); - - writel((cmd->arg >> 16) & 0xffff, sock->addr + SOCK_MMCSD_ARG_HIGH); - writel(cmd->arg & 0xffff, sock->addr + SOCK_MMCSD_ARG_LOW); - writel(cmd->opcode | cmd_mask, sock->addr + SOCK_MMCSD_COMMAND); -} - -static void tifm_sd_fetch_resp(struct mmc_command *cmd, struct tifm_dev *sock) -{ - cmd->resp[0] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x1c) << 16) - | readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x18); - cmd->resp[1] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x14) << 16) - | readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x10); - cmd->resp[2] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x0c) << 16) - | readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x08); - cmd->resp[3] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x04) << 16) - | readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x00); -} - -static void tifm_sd_process_cmd(struct tifm_dev *sock, struct tifm_sd *host, - unsigned int host_status) -{ - struct mmc_command *cmd = host->req->cmd; - -change_state: - switch (host->state) { - case IDLE: - return; - case CMD: - if (host_status & (TIFM_MMCSD_EOC | TIFM_MMCSD_CERR)) { - tifm_sd_fetch_resp(cmd, sock); - if (cmd->data) { - host->state = BRS; - } else { - host->state = READY; - } - goto change_state; - } - break; - case BRS: - if (tifm_sd_transfer_data(sock, host, host_status)) { - if (cmd->data->flags & MMC_DATA_WRITE) { - host->state = CARD; - } else { - if (no_dma) { - if (host->req->stop) { - tifm_sd_exec(host, host->req->stop); - host->state = SCMD; - } else { - host->state = READY; - } - } else { - host->state = FIFO; - } - } - goto change_state; - } - break; - case SCMD: - if (host_status & TIFM_MMCSD_EOC) { - tifm_sd_fetch_resp(host->req->stop, sock); - host->state = READY; - goto change_state; - } - break; - case CARD: - dev_dbg(&sock->dev, "waiting for CARD, have %zd blocks\n", - host->written_blocks); - if (!(host->flags & CARD_BUSY) - && (host->written_blocks == cmd->data->blocks)) { - if (no_dma) { - if (host->req->stop) { - tifm_sd_exec(host, host->req->stop); - host->state = SCMD; - } else { - host->state = READY; - } - } else { - host->state = FIFO; - } - goto change_state; - } - break; - case FIFO: - if (host->flags & FIFO_RDY) { - host->flags &= ~FIFO_RDY; - if (host->req->stop) { - tifm_sd_exec(host, host->req->stop); - host->state = SCMD; - } else { - host->state = READY; - } - goto change_state; - } - break; - case READY: - tasklet_schedule(&host->finish_tasklet); - return; - } - -} - -/* Called from interrupt handler */ -static void tifm_sd_signal_irq(struct tifm_dev *sock, - unsigned int sock_irq_status) -{ - struct tifm_sd *host; - unsigned int host_status = 0, fifo_status = 0; - int error_code = 0; - - spin_lock(&sock->lock); - host = mmc_priv((struct mmc_host*)tifm_get_drvdata(sock)); - - if (sock_irq_status & FIFO_EVENT) { - fifo_status = readl(sock->addr + SOCK_DMA_FIFO_STATUS); - writel(fifo_status, sock->addr + SOCK_DMA_FIFO_STATUS); - - host->flags |= fifo_status & FIFO_RDY; - } - - if (sock_irq_status & CARD_EVENT) { - host_status = readl(sock->addr + SOCK_MMCSD_STATUS); - writel(host_status, sock->addr + SOCK_MMCSD_STATUS); - - if (!host->req) - goto done; - - if (host_status & TIFM_MMCSD_ERRMASK) { - if (host_status & (TIFM_MMCSD_CTO | TIFM_MMCSD_DTO)) - error_code = MMC_ERR_TIMEOUT; - else if (host_status - & (TIFM_MMCSD_CCRC | TIFM_MMCSD_DCRC)) - error_code = MMC_ERR_BADCRC; - - writel(TIFM_FIFO_INT_SETALL, - sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR); - writel(TIFM_DMA_RESET, sock->addr + SOCK_DMA_CONTROL); - - if (host->req->stop) { - if (host->state == SCMD) { - host->req->stop->error = error_code; - } else if (host->state == BRS - || host->state == CARD - || host->state == FIFO) { - host->req->cmd->error = error_code; - tifm_sd_exec(host, host->req->stop); - host->state = SCMD; - goto done; - } else { - host->req->cmd->error = error_code; - } - } else { - host->req->cmd->error = error_code; - } - host->state = READY; - } - - if (host_status & TIFM_MMCSD_CB) - host->flags |= CARD_BUSY; - if ((host_status & TIFM_MMCSD_EOFB) - && (host->flags & CARD_BUSY)) { - host->written_blocks++; - host->flags &= ~CARD_BUSY; - } - } - - if (host->req) - tifm_sd_process_cmd(sock, host, host_status); -done: - dev_dbg(&sock->dev, "host_status %x, fifo_status %x\n", - host_status, fifo_status); - spin_unlock(&sock->lock); -} - -static void tifm_sd_prepare_data(struct tifm_sd *host, struct mmc_command *cmd) -{ - struct tifm_dev *sock = host->dev; - unsigned int dest_cnt; - - /* DMA style IO */ - dev_dbg(&sock->dev, "setting dma for %d blocks\n", - cmd->data->blocks); - writel(TIFM_FIFO_INT_SETALL, - sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR); - writel(ilog2(cmd->data->blksz) - 2, - sock->addr + SOCK_FIFO_PAGE_SIZE); - writel(TIFM_FIFO_ENABLE, sock->addr + SOCK_FIFO_CONTROL); - writel(TIFM_FIFO_INTMASK, sock->addr + SOCK_DMA_FIFO_INT_ENABLE_SET); - - dest_cnt = (cmd->data->blocks) << 8; - - writel(sg_dma_address(cmd->data->sg), sock->addr + SOCK_DMA_ADDRESS); - - writel(cmd->data->blocks - 1, sock->addr + SOCK_MMCSD_NUM_BLOCKS); - writel(cmd->data->blksz - 1, sock->addr + SOCK_MMCSD_BLOCK_LEN); - - if (cmd->data->flags & MMC_DATA_WRITE) { - writel(TIFM_MMCSD_TXDE, sock->addr + SOCK_MMCSD_BUFFER_CONFIG); - writel(dest_cnt | TIFM_DMA_TX | TIFM_DMA_EN, - sock->addr + SOCK_DMA_CONTROL); - } else { - writel(TIFM_MMCSD_RXDE, sock->addr + SOCK_MMCSD_BUFFER_CONFIG); - writel(dest_cnt | TIFM_DMA_EN, sock->addr + SOCK_DMA_CONTROL); - } -} - -static void tifm_sd_set_data_timeout(struct tifm_sd *host, - struct mmc_data *data) -{ - struct tifm_dev *sock = host->dev; - unsigned int data_timeout = data->timeout_clks; - - if (fixed_timeout) - return; - - data_timeout += data->timeout_ns / - ((1000000000UL / host->clk_freq) * host->clk_div); - - if (data_timeout < 0xffff) { - writel(data_timeout, sock->addr + SOCK_MMCSD_DATA_TO); - writel((~TIFM_MMCSD_DPE) - & readl(sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG), - sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG); - } else { - data_timeout = (data_timeout >> 10) + 1; - if (data_timeout > 0xffff) - data_timeout = 0; /* set to unlimited */ - writel(data_timeout, sock->addr + SOCK_MMCSD_DATA_TO); - writel(TIFM_MMCSD_DPE - | readl(sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG), - sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG); - } -} - -static void tifm_sd_request(struct mmc_host *mmc, struct mmc_request *mrq) -{ - struct tifm_sd *host = mmc_priv(mmc); - struct tifm_dev *sock = host->dev; - unsigned long flags; - int sg_count = 0; - struct mmc_data *r_data = mrq->cmd->data; - - spin_lock_irqsave(&sock->lock, flags); - if (host->flags & EJECT) { - spin_unlock_irqrestore(&sock->lock, flags); - goto err_out; - } - - if (host->req) { - printk(KERN_ERR DRIVER_NAME ": unfinished request detected\n"); - spin_unlock_irqrestore(&sock->lock, flags); - goto err_out; - } - - if (r_data) { - tifm_sd_set_data_timeout(host, r_data); - - sg_count = tifm_map_sg(sock, r_data->sg, r_data->sg_len, - mrq->cmd->flags & MMC_DATA_WRITE - ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE); - if (sg_count != 1) { - printk(KERN_ERR DRIVER_NAME - ": scatterlist map failed\n"); - spin_unlock_irqrestore(&sock->lock, flags); - goto err_out; - } - - host->written_blocks = 0; - host->flags &= ~CARD_BUSY; - tifm_sd_prepare_data(host, mrq->cmd); - } - - host->req = mrq; - mod_timer(&host->timer, jiffies + host->timeout_jiffies); - host->state = CMD; - writel(TIFM_CTRL_LED | readl(sock->addr + SOCK_CONTROL), - sock->addr + SOCK_CONTROL); - tifm_sd_exec(host, mrq->cmd); - spin_unlock_irqrestore(&sock->lock, flags); - return; - -err_out: - if (sg_count > 0) - tifm_unmap_sg(sock, r_data->sg, r_data->sg_len, - (r_data->flags & MMC_DATA_WRITE) - ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE); - - mrq->cmd->error = MMC_ERR_TIMEOUT; - mmc_request_done(mmc, mrq); -} - -static void tifm_sd_end_cmd(unsigned long data) -{ - struct tifm_sd *host = (struct tifm_sd*)data; - struct tifm_dev *sock = host->dev; - struct mmc_host *mmc = tifm_get_drvdata(sock); - struct mmc_request *mrq; - struct mmc_data *r_data = NULL; - unsigned long flags; - - spin_lock_irqsave(&sock->lock, flags); - - del_timer(&host->timer); - mrq = host->req; - host->req = NULL; - host->state = IDLE; - - if (!mrq) { - printk(KERN_ERR DRIVER_NAME ": no request to complete?\n"); - spin_unlock_irqrestore(&sock->lock, flags); - return; - } - - r_data = mrq->cmd->data; - if (r_data) { - if (r_data->flags & MMC_DATA_WRITE) { - r_data->bytes_xfered = host->written_blocks - * r_data->blksz; - } else { - r_data->bytes_xfered = r_data->blocks - - readl(sock->addr + SOCK_MMCSD_NUM_BLOCKS) - 1; - r_data->bytes_xfered *= r_data->blksz; - r_data->bytes_xfered += r_data->blksz - - readl(sock->addr + SOCK_MMCSD_BLOCK_LEN) + 1; - } - tifm_unmap_sg(sock, r_data->sg, r_data->sg_len, - (r_data->flags & MMC_DATA_WRITE) - ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE); - } - - writel((~TIFM_CTRL_LED) & readl(sock->addr + SOCK_CONTROL), - sock->addr + SOCK_CONTROL); - - spin_unlock_irqrestore(&sock->lock, flags); - mmc_request_done(mmc, mrq); -} - -static void tifm_sd_request_nodma(struct mmc_host *mmc, struct mmc_request *mrq) -{ - struct tifm_sd *host = mmc_priv(mmc); - struct tifm_dev *sock = host->dev; - unsigned long flags; - struct mmc_data *r_data = mrq->cmd->data; - - spin_lock_irqsave(&sock->lock, flags); - if (host->flags & EJECT) { - spin_unlock_irqrestore(&sock->lock, flags); - goto err_out; - } - - if (host->req) { - printk(KERN_ERR DRIVER_NAME ": unfinished request detected\n"); - spin_unlock_irqrestore(&sock->lock, flags); - goto err_out; - } - - if (r_data) { - tifm_sd_set_data_timeout(host, r_data); - - host->buffer_size = mrq->cmd->data->blocks - * mrq->cmd->data->blksz; - - writel(TIFM_MMCSD_BUFINT - | readl(sock->addr + SOCK_MMCSD_INT_ENABLE), - sock->addr + SOCK_MMCSD_INT_ENABLE); - writel(((TIFM_MMCSD_FIFO_SIZE - 1) << 8) - | (TIFM_MMCSD_FIFO_SIZE - 1), - sock->addr + SOCK_MMCSD_BUFFER_CONFIG); - - host->written_blocks = 0; - host->flags &= ~CARD_BUSY; - host->buffer_pos = 0; - writel(r_data->blocks - 1, sock->addr + SOCK_MMCSD_NUM_BLOCKS); - writel(r_data->blksz - 1, sock->addr + SOCK_MMCSD_BLOCK_LEN); - } - - host->req = mrq; - mod_timer(&host->timer, jiffies + host->timeout_jiffies); - host->state = CMD; - writel(TIFM_CTRL_LED | readl(sock->addr + SOCK_CONTROL), - sock->addr + SOCK_CONTROL); - tifm_sd_exec(host, mrq->cmd); - spin_unlock_irqrestore(&sock->lock, flags); - return; - -err_out: - mrq->cmd->error = MMC_ERR_TIMEOUT; - mmc_request_done(mmc, mrq); -} - -static void tifm_sd_end_cmd_nodma(unsigned long data) -{ - struct tifm_sd *host = (struct tifm_sd*)data; - struct tifm_dev *sock = host->dev; - struct mmc_host *mmc = tifm_get_drvdata(sock); - struct mmc_request *mrq; - struct mmc_data *r_data = NULL; - unsigned long flags; - - spin_lock_irqsave(&sock->lock, flags); - - del_timer(&host->timer); - mrq = host->req; - host->req = NULL; - host->state = IDLE; - - if (!mrq) { - printk(KERN_ERR DRIVER_NAME ": no request to complete?\n"); - spin_unlock_irqrestore(&sock->lock, flags); - return; - } - - r_data = mrq->cmd->data; - if (r_data) { - writel((~TIFM_MMCSD_BUFINT) & - readl(sock->addr + SOCK_MMCSD_INT_ENABLE), - sock->addr + SOCK_MMCSD_INT_ENABLE); - - if (r_data->flags & MMC_DATA_WRITE) { - r_data->bytes_xfered = host->written_blocks - * r_data->blksz; - } else { - r_data->bytes_xfered = r_data->blocks - - readl(sock->addr + SOCK_MMCSD_NUM_BLOCKS) - 1; - r_data->bytes_xfered *= r_data->blksz; - r_data->bytes_xfered += r_data->blksz - - readl(sock->addr + SOCK_MMCSD_BLOCK_LEN) + 1; - } - host->buffer_pos = 0; - host->buffer_size = 0; - } - - writel((~TIFM_CTRL_LED) & readl(sock->addr + SOCK_CONTROL), - sock->addr + SOCK_CONTROL); - - spin_unlock_irqrestore(&sock->lock, flags); - - mmc_request_done(mmc, mrq); -} - -static void tifm_sd_terminate(struct tifm_sd *host) -{ - struct tifm_dev *sock = host->dev; - unsigned long flags; - - writel(0, sock->addr + SOCK_MMCSD_INT_ENABLE); - mmiowb(); - spin_lock_irqsave(&sock->lock, flags); - host->flags |= EJECT; - if (host->req) { - writel(TIFM_FIFO_INT_SETALL, - sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR); - writel(0, sock->addr + SOCK_DMA_FIFO_INT_ENABLE_SET); - tasklet_schedule(&host->finish_tasklet); - } - spin_unlock_irqrestore(&sock->lock, flags); -} - -static void tifm_sd_abort(unsigned long data) -{ - struct tifm_sd *host = (struct tifm_sd*)data; - - printk(KERN_ERR DRIVER_NAME - ": card failed to respond for a long period of time"); - - tifm_sd_terminate(host); - tifm_eject(host->dev); -} - -static void tifm_sd_ios(struct mmc_host *mmc, struct mmc_ios *ios) -{ - struct tifm_sd *host = mmc_priv(mmc); - struct tifm_dev *sock = host->dev; - unsigned int clk_div1, clk_div2; - unsigned long flags; - - spin_lock_irqsave(&sock->lock, flags); - - dev_dbg(&sock->dev, "Setting bus width %d, power %d\n", ios->bus_width, - ios->power_mode); - if (ios->bus_width == MMC_BUS_WIDTH_4) { - writel(TIFM_MMCSD_4BBUS | readl(sock->addr + SOCK_MMCSD_CONFIG), - sock->addr + SOCK_MMCSD_CONFIG); - } else { - writel((~TIFM_MMCSD_4BBUS) - & readl(sock->addr + SOCK_MMCSD_CONFIG), - sock->addr + SOCK_MMCSD_CONFIG); - } - - if (ios->clock) { - clk_div1 = 20000000 / ios->clock; - if (!clk_div1) - clk_div1 = 1; - - clk_div2 = 24000000 / ios->clock; - if (!clk_div2) - clk_div2 = 1; - - if ((20000000 / clk_div1) > ios->clock) - clk_div1++; - if ((24000000 / clk_div2) > ios->clock) - clk_div2++; - if ((20000000 / clk_div1) > (24000000 / clk_div2)) { - host->clk_freq = 20000000; - host->clk_div = clk_div1; - writel((~TIFM_CTRL_FAST_CLK) - & readl(sock->addr + SOCK_CONTROL), - sock->addr + SOCK_CONTROL); - } else { - host->clk_freq = 24000000; - host->clk_div = clk_div2; - writel(TIFM_CTRL_FAST_CLK - | readl(sock->addr + SOCK_CONTROL), - sock->addr + SOCK_CONTROL); - } - } else { - host->clk_div = 0; - } - host->clk_div &= TIFM_MMCSD_CLKMASK; - writel(host->clk_div - | ((~TIFM_MMCSD_CLKMASK) - & readl(sock->addr + SOCK_MMCSD_CONFIG)), - sock->addr + SOCK_MMCSD_CONFIG); - - if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN) - host->flags |= OPENDRAIN; - else - host->flags &= ~OPENDRAIN; - - /* chip_select : maybe later */ - //vdd - //power is set before probe / after remove - //I believe, power_off when already marked for eject is sufficient to - // allow removal. - if ((host->flags & EJECT) && ios->power_mode == MMC_POWER_OFF) { - host->flags |= EJECT_DONE; - wake_up_all(&host->notify); - } - - spin_unlock_irqrestore(&sock->lock, flags); -} - -static int tifm_sd_ro(struct mmc_host *mmc) -{ - int rc; - struct tifm_sd *host = mmc_priv(mmc); - struct tifm_dev *sock = host->dev; - unsigned long flags; - - spin_lock_irqsave(&sock->lock, flags); - - host->flags |= (CARD_RO & readl(sock->addr + SOCK_PRESENT_STATE)); - rc = (host->flags & CARD_RO) ? 1 : 0; - - spin_unlock_irqrestore(&sock->lock, flags); - return rc; -} - -static struct mmc_host_ops tifm_sd_ops = { - .request = tifm_sd_request, - .set_ios = tifm_sd_ios, - .get_ro = tifm_sd_ro -}; - -static int tifm_sd_initialize_host(struct tifm_sd *host) -{ - int rc; - unsigned int host_status = 0; - struct tifm_dev *sock = host->dev; - - writel(0, sock->addr + SOCK_MMCSD_INT_ENABLE); - mmiowb(); - host->clk_div = 61; - host->clk_freq = 20000000; - writel(TIFM_MMCSD_RESET, sock->addr + SOCK_MMCSD_SYSTEM_CONTROL); - writel(host->clk_div | TIFM_MMCSD_POWER, - sock->addr + SOCK_MMCSD_CONFIG); - - /* wait up to 0.51 sec for reset */ - for (rc = 2; rc <= 256; rc <<= 1) { - if (1 & readl(sock->addr + SOCK_MMCSD_SYSTEM_STATUS)) { - rc = 0; - break; - } - msleep(rc); - } - - if (rc) { - printk(KERN_ERR DRIVER_NAME - ": controller failed to reset\n"); - return -ENODEV; - } - - writel(0, sock->addr + SOCK_MMCSD_NUM_BLOCKS); - writel(host->clk_div | TIFM_MMCSD_POWER, - sock->addr + SOCK_MMCSD_CONFIG); - writel(TIFM_MMCSD_RXDE, sock->addr + SOCK_MMCSD_BUFFER_CONFIG); - - // command timeout fixed to 64 clocks for now - writel(64, sock->addr + SOCK_MMCSD_COMMAND_TO); - writel(TIFM_MMCSD_INAB, sock->addr + SOCK_MMCSD_COMMAND); - - /* INAB should take much less than reset */ - for (rc = 1; rc <= 16; rc <<= 1) { - host_status = readl(sock->addr + SOCK_MMCSD_STATUS); - writel(host_status, sock->addr + SOCK_MMCSD_STATUS); - if (!(host_status & TIFM_MMCSD_ERRMASK) - && (host_status & TIFM_MMCSD_EOC)) { - rc = 0; - break; - } - msleep(rc); - } - - if (rc) { - printk(KERN_ERR DRIVER_NAME - ": card not ready - probe failed on initialization\n"); - return -ENODEV; - } - - writel(TIFM_MMCSD_DATAMASK | TIFM_MMCSD_ERRMASK, - sock->addr + SOCK_MMCSD_INT_ENABLE); - mmiowb(); - - return 0; -} - -static int tifm_sd_probe(struct tifm_dev *sock) -{ - struct mmc_host *mmc; - struct tifm_sd *host; - int rc = -EIO; - - if (!(TIFM_SOCK_STATE_OCCUPIED - & readl(sock->addr + SOCK_PRESENT_STATE))) { - printk(KERN_WARNING DRIVER_NAME ": card gone, unexpectedly\n"); - return rc; - } - - mmc = mmc_alloc_host(sizeof(struct tifm_sd), &sock->dev); - if (!mmc) - return -ENOMEM; - - host = mmc_priv(mmc); - tifm_set_drvdata(sock, mmc); - host->dev = sock; - host->timeout_jiffies = msecs_to_jiffies(1000); - - init_waitqueue_head(&host->notify); - tasklet_init(&host->finish_tasklet, - no_dma ? tifm_sd_end_cmd_nodma : tifm_sd_end_cmd, - (unsigned long)host); - setup_timer(&host->timer, tifm_sd_abort, (unsigned long)host); - - tifm_sd_ops.request = no_dma ? tifm_sd_request_nodma : tifm_sd_request; - mmc->ops = &tifm_sd_ops; - mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34; - mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_MULTIWRITE; - mmc->f_min = 20000000 / 60; - mmc->f_max = 24000000; - mmc->max_hw_segs = 1; - mmc->max_phys_segs = 1; - // limited by DMA counter - it's safer to stick with - // block counter has 11 bits though - mmc->max_blk_count = 256; - // 2k maximum hw block length - mmc->max_blk_size = 2048; - mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count; - mmc->max_seg_size = mmc->max_req_size; - sock->signal_irq = tifm_sd_signal_irq; - rc = tifm_sd_initialize_host(host); - - if (!rc) - rc = mmc_add_host(mmc); - if (rc) - goto out_free_mmc; - - return 0; -out_free_mmc: - mmc_free_host(mmc); - return rc; -} - -static void tifm_sd_remove(struct tifm_dev *sock) -{ - struct mmc_host *mmc = tifm_get_drvdata(sock); - struct tifm_sd *host = mmc_priv(mmc); - - del_timer_sync(&host->timer); - tifm_sd_terminate(host); - wait_event_timeout(host->notify, host->flags & EJECT_DONE, - host->timeout_jiffies); - tasklet_kill(&host->finish_tasklet); - mmc_remove_host(mmc); - - /* The meaning of the bit majority in this constant is unknown. */ - writel(0xfff8 & readl(sock->addr + SOCK_CONTROL), - sock->addr + SOCK_CONTROL); - - tifm_set_drvdata(sock, NULL); - mmc_free_host(mmc); -} - -#ifdef CONFIG_PM - -static int tifm_sd_suspend(struct tifm_dev *sock, pm_message_t state) -{ - struct mmc_host *mmc = tifm_get_drvdata(sock); - int rc; - - rc = mmc_suspend_host(mmc, state); - /* The meaning of the bit majority in this constant is unknown. */ - writel(0xfff8 & readl(sock->addr + SOCK_CONTROL), - sock->addr + SOCK_CONTROL); - return rc; -} - -static int tifm_sd_resume(struct tifm_dev *sock) -{ - struct mmc_host *mmc = tifm_get_drvdata(sock); - struct tifm_sd *host = mmc_priv(mmc); - - if (sock->media_id != FM_SD - || tifm_sd_initialize_host(host)) { - tifm_eject(sock); - return 0; - } else { - return mmc_resume_host(mmc); - } -} - -#else - -#define tifm_sd_suspend NULL -#define tifm_sd_resume NULL - -#endif /* CONFIG_PM */ - -static tifm_media_id tifm_sd_id_tbl[] = { - FM_SD, 0 -}; - -static struct tifm_driver tifm_sd_driver = { - .driver = { - .name = DRIVER_NAME, - .owner = THIS_MODULE - }, - .id_table = tifm_sd_id_tbl, - .probe = tifm_sd_probe, - .remove = tifm_sd_remove, - .suspend = tifm_sd_suspend, - .resume = tifm_sd_resume -}; - -static int __init tifm_sd_init(void) -{ - return tifm_register_driver(&tifm_sd_driver); -} - -static void __exit tifm_sd_exit(void) -{ - tifm_unregister_driver(&tifm_sd_driver); -} - -MODULE_AUTHOR("Alex Dubov"); -MODULE_DESCRIPTION("TI FlashMedia SD driver"); -MODULE_LICENSE("GPL"); -MODULE_DEVICE_TABLE(tifm, tifm_sd_id_tbl); -MODULE_VERSION(DRIVER_VERSION); - -module_init(tifm_sd_init); -module_exit(tifm_sd_exit); |