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+/*******************************************************************************
+*
+* (c) 1999 by Computone Corporation
+*
+********************************************************************************
+*
+*
+* PACKAGE: Linux tty Device Driver for IntelliPort II family of multiport
+* serial I/O controllers.
+*
+* DESCRIPTION: Mainline code for the device driver
+*
+*******************************************************************************/
+//------------------------------------------------------------------------------
+// i2ellis.h
+//
+// IntelliPort-II and IntelliPort-IIEX
+//
+// Extremely
+// Low
+// Level
+// Interface
+// Services
+//
+// Structure Definitions and declarations for "ELLIS" service routines found in
+// i2ellis.c
+//
+// These routines are based on properties of the IntelliPort-II and -IIEX
+// hardware and bootstrap firmware, and are not sensitive to particular
+// conventions of any particular loadware.
+//
+// Unlike i2hw.h, which provides IRONCLAD hardware definitions, the material
+// here and in i2ellis.c is intended to provice a useful, but not required,
+// layer of insulation from the hardware specifics.
+//------------------------------------------------------------------------------
+#ifndef I2ELLIS_H /* To prevent multiple includes */
+#define I2ELLIS_H 1
+//------------------------------------------------
+// Revision History:
+//
+// 30 September 1991 MAG First Draft Started
+// 12 October 1991 ...continued...
+//
+// 20 December 1996 AKM Linux version
+//-------------------------------------------------
+
+//----------------------
+// Mandatory Includes:
+//----------------------
+#include <linux/config.h>
+#include "ip2types.h"
+#include "i2hw.h" // The hardware definitions
+
+//------------------------------------------
+// STAT_BOXIDS packets
+//------------------------------------------
+#define MAX_BOX 4
+
+typedef struct _bidStat
+{
+ unsigned char bid_value[MAX_BOX];
+} bidStat, *bidStatPtr;
+
+// This packet is sent in response to a CMD_GET_BOXIDS bypass command. For -IIEX
+// boards, reports the hardware-specific "asynchronous resource register" on
+// each expansion box. Boxes not present report 0xff. For -II boards, the first
+// element contains 0x80 for 8-port, 0x40 for 4-port boards.
+
+// Box IDs aka ARR or Async Resource Register (more than you want to know)
+// 7 6 5 4 3 2 1 0
+// F F N N L S S S
+// =============================
+// F F - Product Family Designator
+// =====+++++++++++++++++++++++++++++++
+// 0 0 - Intelliport II EX / ISA-8
+// 1 0 - IntelliServer
+// 0 1 - SAC - Port Device (Intelliport III ??? )
+// =====+++++++++++++++++++++++++++++++++++++++
+// N N - Number of Ports
+// 0 0 - 8 (eight)
+// 0 1 - 4 (four)
+// 1 0 - 12 (twelve)
+// 1 1 - 16 (sixteen)
+// =++++++++++++++++++++++++++++++++++
+// L - LCD Display Module Present
+// 0 - No
+// 1 - LCD module present
+// =========+++++++++++++++++++++++++++++++++++++
+// S S S - Async Signals Supported Designator
+// 0 0 0 - 8dss, Mod DCE DB25 Female
+// 0 0 1 - 6dss, RJ-45
+// 0 1 0 - RS-232/422 dss, DB25 Female
+// 0 1 1 - RS-232/422 dss, separate 232/422 DB25 Female
+// 1 0 0 - 6dss, 921.6 I/F with ST654's
+// 1 0 1 - RS-423/232 8dss, RJ-45 10Pin
+// 1 1 0 - 6dss, Mod DCE DB25 Female
+// 1 1 1 - NO BOX PRESENT
+
+#define FF(c) ((c & 0xC0) >> 6)
+#define NN(c) ((c & 0x30) >> 4)
+#define L(c) ((c & 0x08) >> 3)
+#define SSS(c) (c & 0x07)
+
+#define BID_HAS_654(x) (SSS(x) == 0x04)
+#define BID_NO_BOX 0xff /* no box */
+#define BID_8PORT 0x80 /* IP2-8 port */
+#define BID_4PORT 0x81 /* IP2-4 port */
+#define BID_EXP_MASK 0x30 /* IP2-EX */
+#define BID_EXP_8PORT 0x00 /* 8, */
+#define BID_EXP_4PORT 0x10 /* 4, */
+#define BID_EXP_UNDEF 0x20 /* UNDEF, */
+#define BID_EXP_16PORT 0x30 /* 16, */
+#define BID_LCD_CTRL 0x08 /* LCD Controller */
+#define BID_LCD_NONE 0x00 /* - no controller present */
+#define BID_LCD_PRES 0x08 /* - controller present */
+#define BID_CON_MASK 0x07 /* - connector pinouts */
+#define BID_CON_DB25 0x00 /* - DB-25 F */
+#define BID_CON_RJ45 0x01 /* - rj45 */
+
+//------------------------------------------------------------------------------
+// i2eBordStr
+//
+// This structure contains all the information the ELLIS routines require in
+// dealing with a particular board.
+//------------------------------------------------------------------------------
+// There are some queues here which are guaranteed to never contain the entry
+// for a single channel twice. So they must be slightly larger to allow
+// unambiguous full/empty management
+//
+#define CH_QUEUE_SIZE ABS_MOST_PORTS+2
+
+typedef struct _i2eBordStr
+{
+ porStr i2ePom; // Structure containing the power-on message.
+
+ unsigned short i2ePomSize;
+ // The number of bytes actually read if
+ // different from sizeof i2ePom, indicates
+ // there is an error!
+
+ unsigned short i2eStartMail;
+ // Contains whatever inbound mailbox data
+ // present at startup. NO_MAIL_HERE indicates
+ // nothing was present. No special
+ // significance as of this writing, but may be
+ // useful for diagnostic reasons.
+
+ unsigned short i2eValid;
+ // Indicates validity of the structure; if
+ // i2eValid == I2E_MAGIC, then we can trust
+ // the other fields. Some (especially
+ // initialization) functions are good about
+ // checking for validity. Many functions do
+ // not, it being assumed that the larger
+ // context assures we are using a valid
+ // i2eBordStrPtr.
+
+ unsigned short i2eError;
+ // Used for returning an error condition from
+ // several functions which use i2eBordStrPtr
+ // as an argument.
+
+ // Accelerators to characterize separate features of a board, derived from a
+ // number of sources.
+
+ unsigned short i2eFifoSize;
+ // Always, the size of the FIFO. For
+ // IntelliPort-II, always the same, for -IIEX
+ // taken from the Power-On reset message.
+
+ volatile
+ unsigned short i2eFifoRemains;
+ // Used during normal operation to indicate a
+ // lower bound on the amount of data which
+ // might be in the outbound fifo.
+
+ unsigned char i2eFifoStyle;
+ // Accelerator which tells which style (-II or
+ // -IIEX) FIFO we are using.
+
+ unsigned char i2eDataWidth16;
+ // Accelerator which tells whether we should
+ // do 8 or 16-bit data transfers.
+
+ unsigned char i2eMaxIrq;
+ // The highest allowable IRQ, based on the
+ // slot size.
+
+ unsigned char i2eChangeIrq;
+ // Whether tis valid to change IRQ's
+ // ISA = ok, EISA, MicroChannel, no
+
+ // Accelerators for various addresses on the board
+ int i2eBase; // I/O Address of the Board
+ int i2eData; // From here data transfers happen
+ int i2eStatus; // From here status reads happen
+ int i2ePointer; // (IntelliPort-II: pointer/commands)
+ int i2eXMail; // (IntelliPOrt-IIEX: mailboxes
+ int i2eXMask; // (IntelliPort-IIEX: mask write
+
+ //-------------------------------------------------------
+ // Information presented in a common format across boards
+ // For each box, bit map of the channels present. Box closest to
+ // the host is box 0. LSB is channel 0. IntelliPort-II (non-expandable)
+ // is taken to be box 0. These are derived from product i.d. registers.
+
+ unsigned short i2eChannelMap[ABS_MAX_BOXES];
+
+ // Same as above, except each is derived from firmware attempting to detect
+ // the uart presence (by reading a valid GFRCR register). If bits are set in
+ // i2eChannelMap and not in i2eGoodMap, there is a potential problem.
+
+ unsigned short i2eGoodMap[ABS_MAX_BOXES];
+
+ // ---------------------------
+ // For indirect function calls
+
+ // Routine to cause an N-millisecond delay: Patched by the ii2Initialize
+ // function.
+
+ void (*i2eDelay)(unsigned int);
+
+ // Routine to write N bytes to the board through the FIFO. Returns true if
+ // all copacetic, otherwise returns false and error is in i2eError field.
+ // IF COUNT IS ODD, ROUNDS UP TO THE NEXT EVEN NUMBER.
+
+ int (*i2eWriteBuf)(struct _i2eBordStr *, unsigned char *, int);
+
+ // Routine to read N bytes from the board through the FIFO. Returns true if
+ // copacetic, otherwise returns false and error in i2eError.
+ // IF COUNT IS ODD, ROUNDS UP TO THE NEXT EVEN NUMBER.
+
+ int (*i2eReadBuf)(struct _i2eBordStr *, unsigned char *, int);
+
+ // Returns a word from FIFO. Will use 2 byte operations if needed.
+
+ unsigned short (*i2eReadWord)(struct _i2eBordStr *);
+
+ // Writes a word to FIFO. Will use 2 byte operations if needed.
+
+ void (*i2eWriteWord)(struct _i2eBordStr *, unsigned short);
+
+ // Waits specified time for the Transmit FIFO to go empty. Returns true if
+ // ok, otherwise returns false and error in i2eError.
+
+ int (*i2eWaitForTxEmpty)(struct _i2eBordStr *, int);
+
+ // Returns true or false according to whether the outgoing mailbox is empty.
+
+ int (*i2eTxMailEmpty)(struct _i2eBordStr *);
+
+ // Checks whether outgoing mailbox is empty. If so, sends mail and returns
+ // true. Otherwise returns false.
+
+ int (*i2eTrySendMail)(struct _i2eBordStr *, unsigned char);
+
+ // If no mail available, returns NO_MAIL_HERE, else returns the value in the
+ // mailbox (guaranteed can't be NO_MAIL_HERE).
+
+ unsigned short (*i2eGetMail)(struct _i2eBordStr *);
+
+ // Enables the board to interrupt the host when it writes to the mailbox.
+ // Irqs will not occur, however, until the loadware separately enables
+ // interrupt generation to the host. The standard loadware does this in
+ // response to a command packet sent by the host. (Also, disables
+ // any other potential interrupt sources from the board -- other than the
+ // inbound mailbox).
+
+ void (*i2eEnableMailIrq)(struct _i2eBordStr *);
+
+ // Writes an arbitrary value to the mask register.
+
+ void (*i2eWriteMask)(struct _i2eBordStr *, unsigned char);
+
+
+ // State information
+
+ // During downloading, indicates the number of blocks remaining to download
+ // to the board.
+
+ short i2eToLoad;
+
+ // State of board (see manifests below) (e.g., whether in reset condition,
+ // whether standard loadware is installed, etc.
+
+ unsigned char i2eState;
+
+ // These three fields are only valid when there is loadware running on the
+ // board. (i2eState == II_STATE_LOADED or i2eState == II_STATE_STDLOADED )
+
+ unsigned char i2eLVersion; // Loadware version
+ unsigned char i2eLRevision; // Loadware revision
+ unsigned char i2eLSub; // Loadware subrevision
+
+ // Flags which only have meaning in the context of the standard loadware.
+ // Somewhat violates the layering concept, but there is so little additional
+ // needed at the board level (while much additional at the channel level),
+ // that this beats maintaining two different per-board structures.
+
+ // Indicates which IRQ the board has been initialized (from software) to use
+ // For MicroChannel boards, any value different from IRQ_UNDEFINED means
+ // that the software command has been sent to enable interrupts (or specify
+ // they are disabled). Special value: IRQ_UNDEFINED indicates that the
+ // software command to select the interrupt has not yet been sent, therefore
+ // (since the standard loadware insists that it be sent before any other
+ // packets are sent) no other packets should be sent yet.
+
+ unsigned short i2eUsingIrq;
+
+ // This is set when we hit the MB_OUT_STUFFED mailbox, which prevents us
+ // putting more in the mailbox until an appropriate mailbox message is
+ // received.
+
+ unsigned char i2eWaitingForEmptyFifo;
+
+ // Any mailbox bits waiting to be sent to the board are OR'ed in here.
+
+ unsigned char i2eOutMailWaiting;
+
+ // The head of any incoming packet is read into here, is then examined and
+ // we dispatch accordingly.
+
+ unsigned short i2eLeadoffWord[1];
+
+ // Running counter of interrupts where the mailbox indicated incoming data.
+
+ unsigned short i2eFifoInInts;
+
+ // Running counter of interrupts where the mailbox indicated outgoing data
+ // had been stripped.
+
+ unsigned short i2eFifoOutInts;
+
+ // If not void, gives the address of a routine to call if fatal board error
+ // is found (only applies to standard l/w).
+
+ void (*i2eFatalTrap)(struct _i2eBordStr *);
+
+ // Will point to an array of some sort of channel structures (whose format
+ // is unknown at this level, being a function of what loadware is
+ // installed and the code configuration (max sizes of buffers, etc.)).
+
+ void *i2eChannelPtr;
+
+ // Set indicates that the board has gone fatal.
+
+ unsigned short i2eFatal;
+
+ // The number of elements pointed to by i2eChannelPtr.
+
+ unsigned short i2eChannelCnt;
+
+ // Ring-buffers of channel structures whose channels have particular needs.
+
+ rwlock_t Fbuf_spinlock;
+ volatile
+ unsigned short i2Fbuf_strip; // Strip index
+ volatile
+ unsigned short i2Fbuf_stuff; // Stuff index
+ void *i2Fbuf[CH_QUEUE_SIZE]; // An array of channel pointers
+ // of channels who need to send
+ // flow control packets.
+ rwlock_t Dbuf_spinlock;
+ volatile
+ unsigned short i2Dbuf_strip; // Strip index
+ volatile
+ unsigned short i2Dbuf_stuff; // Stuff index
+ void *i2Dbuf[CH_QUEUE_SIZE]; // An array of channel pointers
+ // of channels who need to send
+ // data or in-line command packets.
+ rwlock_t Bbuf_spinlock;
+ volatile
+ unsigned short i2Bbuf_strip; // Strip index
+ volatile
+ unsigned short i2Bbuf_stuff; // Stuff index
+ void *i2Bbuf[CH_QUEUE_SIZE]; // An array of channel pointers
+ // of channels who need to send
+ // bypass command packets.
+
+ /*
+ * A set of flags to indicate that certain events have occurred on at least
+ * one of the ports on this board. We use this to decide whether to spin
+ * through the channels looking for breaks, etc.
+ */
+ int got_input;
+ int status_change;
+ bidStat channelBtypes;
+
+ /*
+ * Debugging counters, etc.
+ */
+ unsigned long debugFlowQueued;
+ unsigned long debugInlineQueued;
+ unsigned long debugDataQueued;
+ unsigned long debugBypassQueued;
+ unsigned long debugFlowCount;
+ unsigned long debugInlineCount;
+ unsigned long debugBypassCount;
+
+ rwlock_t read_fifo_spinlock;
+ rwlock_t write_fifo_spinlock;
+
+// For queuing interrupt bottom half handlers. /\/\|=mhw=|\/\/
+ struct work_struct tqueue_interrupt;
+
+ struct timer_list SendPendingTimer; // Used by iiSendPending
+ unsigned int SendPendingRetry;
+} i2eBordStr, *i2eBordStrPtr;
+
+//-------------------------------------------------------------------
+// Macro Definitions for the indirect calls defined in the i2eBordStr
+//-------------------------------------------------------------------
+//
+#define iiDelay(a,b) (*(a)->i2eDelay)(b)
+#define iiWriteBuf(a,b,c) (*(a)->i2eWriteBuf)(a,b,c)
+#define iiReadBuf(a,b,c) (*(a)->i2eReadBuf)(a,b,c)
+
+#define iiWriteWord(a,b) (*(a)->i2eWriteWord)(a,b)
+#define iiReadWord(a) (*(a)->i2eReadWord)(a)
+
+#define iiWaitForTxEmpty(a,b) (*(a)->i2eWaitForTxEmpty)(a,b)
+
+#define iiTxMailEmpty(a) (*(a)->i2eTxMailEmpty)(a)
+#define iiTrySendMail(a,b) (*(a)->i2eTrySendMail)(a,b)
+
+#define iiGetMail(a) (*(a)->i2eGetMail)(a)
+#define iiEnableMailIrq(a) (*(a)->i2eEnableMailIrq)(a)
+#define iiDisableMailIrq(a) (*(a)->i2eWriteMask)(a,0)
+#define iiWriteMask(a,b) (*(a)->i2eWriteMask)(a,b)
+
+//-------------------------------------------
+// Manifests for i2eBordStr:
+//-------------------------------------------
+
+#define YES 1
+#define NO 0
+
+#define NULLFUNC (void (*)(void))0
+#define NULLPTR (void *)0
+
+typedef void (*delayFunc_t)(unsigned int);
+
+// i2eValid
+//
+#define I2E_MAGIC 0x4251 // Structure is valid.
+#define I2E_INCOMPLETE 0x1122 // Structure failed during init.
+
+
+// i2eError
+//
+#define I2EE_GOOD 0 // Operation successful
+#define I2EE_BADADDR 1 // Address out of range
+#define I2EE_BADSTATE 2 // Attempt to perform a function when the board
+ // structure was in the incorrect state
+#define I2EE_BADMAGIC 3 // Bad magic number from Power On test (i2ePomSize
+ // reflects what was read
+#define I2EE_PORM_SHORT 4 // Power On message too short
+#define I2EE_PORM_LONG 5 // Power On message too long
+#define I2EE_BAD_FAMILY 6 // Un-supported board family type
+#define I2EE_INCONSIST 7 // Firmware reports something impossible,
+ // e.g. unexpected number of ports... Almost no
+ // excuse other than bad FIFO...
+#define I2EE_POSTERR 8 // Power-On self test reported a bad error
+#define I2EE_BADBUS 9 // Unknown Bus type declared in message
+#define I2EE_TXE_TIME 10 // Timed out waiting for TX Fifo to empty
+#define I2EE_INVALID 11 // i2eValid field does not indicate a valid and
+ // complete board structure (for functions which
+ // require this be so.)
+#define I2EE_BAD_PORT 12 // Discrepancy between channels actually found and
+ // what the product is supposed to have. Check
+ // i2eGoodMap vs i2eChannelMap for details.
+#define I2EE_BAD_IRQ 13 // Someone specified an unsupported IRQ
+#define I2EE_NOCHANNELS 14 // No channel structures have been defined (for
+ // functions requiring this).
+
+// i2eFifoStyle
+//
+#define FIFO_II 0 /* IntelliPort-II style: see also i2hw.h */
+#define FIFO_IIEX 1 /* IntelliPort-IIEX style */
+
+// i2eGetMail
+//
+#define NO_MAIL_HERE 0x1111 // Since mail is unsigned char, cannot possibly
+ // promote to 0x1111.
+// i2eState
+//
+#define II_STATE_COLD 0 // Addresses have been defined, but board not even
+ // reset yet.
+#define II_STATE_RESET 1 // Board,if it exists, has just been reset
+#define II_STATE_READY 2 // Board ready for its first block
+#define II_STATE_LOADING 3 // Board continuing load
+#define II_STATE_LOADED 4 // Board has finished load: status ok
+#define II_STATE_BADLOAD 5 // Board has finished load: failed!
+#define II_STATE_STDLOADED 6 // Board has finished load: standard firmware
+
+// i2eUsingIrq
+//
+#define IRQ_UNDEFINED 0x1352 // No valid irq (or polling = 0) can ever
+ // promote to this!
+//------------------------------------------
+// Handy Macros for i2ellis.c and others
+// Note these are common to -II and -IIEX
+//------------------------------------------
+
+// Given a pointer to the board structure, does the input FIFO have any data or
+// not?
+//
+#define HAS_INPUT(pB) !(INB(pB->i2eStatus) & ST_IN_EMPTY)
+#define HAS_NO_INPUT(pB) (INB(pB->i2eStatus) & ST_IN_EMPTY)
+
+// Given a pointer to board structure, read a byte or word from the fifo
+//
+#define BYTE_FROM(pB) (unsigned char)INB(pB->i2eData)
+#define WORD_FROM(pB) (unsigned short)INW(pB->i2eData)
+
+// Given a pointer to board structure, is there room for any data to be written
+// to the data fifo?
+//
+#define HAS_OUTROOM(pB) !(INB(pB->i2eStatus) & ST_OUT_FULL)
+#define HAS_NO_OUTROOM(pB) (INB(pB->i2eStatus) & ST_OUT_FULL)
+
+// Given a pointer to board structure, write a single byte to the fifo
+// structure. Note that for 16-bit interfaces, the high order byte is undefined
+// and unknown.
+//
+#define BYTE_TO(pB, c) OUTB(pB->i2eData,(c))
+
+// Write a word to the fifo structure. For 8-bit interfaces, this may have
+// unknown results.
+//
+#define WORD_TO(pB, c) OUTW(pB->i2eData,(c))
+
+// Given a pointer to the board structure, is there anything in the incoming
+// mailbox?
+//
+#define HAS_MAIL(pB) (INB(pB->i2eStatus) & ST_IN_MAIL)
+
+#define UPDATE_FIFO_ROOM(pB) (pB)->i2eFifoRemains=(pB)->i2eFifoSize
+
+// Handy macro to round up a number (like the buffer write and read routines do)
+//
+#define ROUNDUP(number) (((number)+1) & (~1))
+
+//------------------------------------------
+// Function Declarations for i2ellis.c
+//------------------------------------------
+//
+// Functions called directly
+//
+// Initialization of a board & structure is in four (five!) parts:
+//
+// 0) iiEllisInit() - Initialize iiEllis subsystem.
+// 1) iiSetAddress() - Define the board address & delay function for a board.
+// 2) iiReset() - Reset the board (provided it exists)
+// -- Note you may do this to several boards --
+// 3) iiResetDelay() - Delay for 2 seconds (once for all boards)
+// 4) iiInitialize() - Attempt to read Power-up message; further initialize
+// accelerators
+//
+// Then you may use iiDownloadAll() or iiDownloadFile() (in i2file.c) to write
+// loadware. To change loadware, you must begin again with step 2, resetting
+// the board again (step 1 not needed).
+
+static void iiEllisInit(void);
+static int iiSetAddress(i2eBordStrPtr, int, delayFunc_t );
+static int iiReset(i2eBordStrPtr);
+static int iiResetDelay(i2eBordStrPtr);
+static int iiInitialize(i2eBordStrPtr);
+
+// Routine to validate that all channels expected are there.
+//
+extern int iiValidateChannels(i2eBordStrPtr);
+
+// Routine used to download a block of loadware.
+//
+static int iiDownloadBlock(i2eBordStrPtr, loadHdrStrPtr, int);
+
+// Return values given by iiDownloadBlock, iiDownloadAll, iiDownloadFile:
+//
+#define II_DOWN_BADVALID 0 // board structure is invalid
+#define II_DOWN_CONTINUING 1 // So far, so good, firmware expects more
+#define II_DOWN_GOOD 2 // Download complete, CRC good
+#define II_DOWN_BAD 3 // Download complete, but CRC bad
+#define II_DOWN_BADFILE 4 // Bad magic number in loadware file
+#define II_DOWN_BADSTATE 5 // Board is in an inappropriate state for
+ // downloading loadware. (see i2eState)
+#define II_DOWN_TIMEOUT 6 // Timeout waiting for firmware
+#define II_DOWN_OVER 7 // Too much data
+#define II_DOWN_UNDER 8 // Not enough data
+#define II_DOWN_NOFILE 9 // Loadware file not found
+
+// Routine to download an entire loadware module: Return values are a subset of
+// iiDownloadBlock's, excluding, of course, II_DOWN_CONTINUING
+//
+static int iiDownloadAll(i2eBordStrPtr, loadHdrStrPtr, int, int);
+
+// Called indirectly always. Needed externally so the routine might be
+// SPECIFIED as an argument to iiReset()
+//
+//static void ii2DelayIO(unsigned int); // N-millisecond delay using
+ //hardware spin
+//static void ii2DelayTimer(unsigned int); // N-millisecond delay using Linux
+ //timer
+
+// Many functions defined here return True if good, False otherwise, with an
+// error code in i2eError field. Here is a handy macro for setting the error
+// code and returning.
+//
+#define COMPLETE(pB,code) \
+ if(1){ \
+ pB->i2eError = code; \
+ return (code == I2EE_GOOD);\
+ }
+
+#endif // I2ELLIS_H