i2ellis.h
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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 interupt bottom half handlers. //|=mhw=|//
- struct tq_struct tqueue_interrupt;
- struct timer_list SendPendingTimer; // Used by iiSendPending
- unsigned int SendPendingRetry;
- #ifdef CONFIG_DEVFS_FS
- /* Device handles into devfs */
- devfs_handle_t devfs_ipl_handle;
- devfs_handle_t devfs_stat_handle;
- #endif
- } 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