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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 "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.
-
- // 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:
-//-------------------------------------------
-
-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 I2_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 I2_HAS_INPUT(pB) !(inb(pB->i2eStatus) & ST_IN_EMPTY)
-
-// Given a pointer to the board structure, is there anything in the incoming
-// mailbox?
-//
-#define I2_HAS_MAIL(pB) (inb(pB->i2eStatus) & ST_IN_MAIL)
-
-#define I2_UPDATE_FIFO_ROOM(pB) ((pB)->i2eFifoRemains = (pB)->i2eFifoSize)
-
-//------------------------------------------
-// Function Declarations for i2ellis.c
-//------------------------------------------
-//
-// Functions called directly
-//
-// Initialization of a board & structure is in four (five!) parts:
-//
-// 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 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);
-
-// 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 I2_COMPLETE(pB,code) do { \
- pB->i2eError = code; \
- return (code == I2EE_GOOD);\
- } while (0)
-
-#endif // I2ELLIS_H