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Annotation of ntddk/src/scsi/fd8xx/fd8xx.h, revision 1.1

1.1     ! root        1: /*++
        !             2: 
        !             3: Copyright (c) 1991, 1992  Microsoft Corporation
        !             4: Copyright (c) 1992  Future Domain Corporation
        !             5: 
        !             6: Module Name:
        !             7: 
        !             8:     fd8xx.h
        !             9: 
        !            10: Abstract:
        !            11: 
        !            12:     Definitions for the Future Domain TMC-8XX SCSI controllers.
        !            13: 
        !            14: Author:
        !            15: 
        !            16:     Bob Rinne (bobri - Microsoft)           June 1991
        !            17:     Roger Stoller (v-rogs - Future Domain)  August 1992
        !            18: 
        !            19: Revision History:
        !            20: 
        !            21: --*/
        !            22: 
        !            23: #include "scsi.h"
        !            24: 
        !            25: //
        !            26: // Size of memory mapped area used.
        !            27: //
        !            28: #define FD8XX_ADDRESS_SIZE  0x2000
        !            29: 
        !            30: //
        !            31: // I/O Memory Map Interface.  Offsets from BaseAddress referrences.
        !            32: //
        !            33: #define WRITE_CONTROL   0x1C00
        !            34: #define READ_STATUS     0x1C00
        !            35: #define WRITE_SCSI      0x1E00
        !            36: #define READ_SCSI       0x1E00
        !            37: 
        !            38: //
        !            39: // Macros for accessing the control memory of the FD8XX.
        !            40: //
        !            41: #define FD8XX_SET_CONTROL(BASE, VALUE) \
        !            42:           ScsiPortWriteRegisterUchar((BASE + WRITE_CONTROL), (VALUE))
        !            43: 
        !            44: #define FD8XX_READ_STATUS(BASE) \
        !            45:           ScsiPortReadRegisterUchar(BASE + READ_STATUS)
        !            46: 
        !            47: #define FD8XX_READ_ALTERNATE_STATUS(BASE, OFFSET) \
        !            48:           ScsiPortReadRegisterUchar(BASE + (READ_STATUS + OFFSET))
        !            49: 
        !            50: #define FD8XX_WRITE_DATA(BASE, VALUE) \
        !            51:           ScsiPortWriteRegisterUchar((BASE + WRITE_SCSI), (UCHAR) (VALUE))
        !            52: 
        !            53: #define FD8XX_READ_DATA(BASE) \
        !            54:           ScsiPortReadRegisterUchar(BASE + READ_SCSI)
        !            55: 
        !            56: #define FD8XX_READ_ALTERNATE_DATA(BASE, OFFSET) \
        !            57:           ScsiPortReadRegisterUchar(BASE + READ_SCSI + OFFSET)
        !            58: 
        !            59: //
        !            60: // Control port output codes.
        !            61: //
        !            62: #define C_RESET         0x01    // Assert SCSI reset line
        !            63: #define C_SELECT        0x02    // Assert SCSI select line
        !            64: #define C_BUSY          0x04    // Assert SCSI busy line
        !            65: #define C_ATTENTION     0x08    // Assert SCSI attention line
        !            66: #define C_ARBITRATION   0x10    // Start arbitration
        !            67: #define C_PARITY_ENABLE 0x20    // Parity enable
        !            68: #define C_INT_ENABLE    0x40    // Enable interrupt
        !            69: #define C_BUS_ENABLE    0x80    // Bus enable
        !            70: 
        !            71: //
        !            72: // Input status bit definitions.
        !            73: //
        !            74: #define S_BUSY          0x01    // Busy line from SCSI bus
        !            75: #define S_MESSAGE       0x02    // Message line from SCSI bus
        !            76: #define S_IO            0x04    // Input/Output line from SCSI bus
        !            77: #define S_CD            0x08    // Command/Data line from SCSI bus
        !            78: #define S_REQUEST       0x10    // Request line from SCSI bus
        !            79: #define S_SELECT        0x20    // Select line from SCSI bus
        !            80: #define S_PARITY        0x40    // Parity error status
        !            81: #define S_ARB_COMPLETE  0x80    // Arbitration complete
        !            82: 
        !            83: //
        !            84: // Useful status combinations.
        !            85: //
        !            86: #define BP_BUS_FREE     0
        !            87: #define BP_COMMAND      ( S_BUSY | S_CD | S_REQUEST )
        !            88: #define BP_MESSAGE_IN   ( S_BUSY | S_MESSAGE | S_IO | S_CD | S_REQUEST )
        !            89: #define BP_MESSAGE_OUT  ( S_BUSY | S_MESSAGE | S_CD | S_REQUEST )
        !            90: #define BP_DATA_IN      ( S_BUSY | S_IO | S_REQUEST )
        !            91: #define BP_DATA_OUT     ( S_BUSY | S_REQUEST )
        !            92: #define BP_STATUS       ( S_BUSY | S_IO | S_CD | S_REQUEST )
        !            93: #define BP_RESELECT     ( S_SELECT | S_IO )
        !            94: 
        !            95: //
        !            96: // Status mask for bus phase.  This is everything except Parity and
        !            97: // Arbitration complete.
        !            98: //
        !            99: #define S_PHASE_MASK    ((UCHAR) 0x3F)
        !           100: 
        !           101: #define FD8XX_READ_PHASE(BASE)  ((UCHAR) (FD8XX_READ_STATUS(BASE) & S_PHASE_MASK))
        !           102: 
        !           103: //
        !           104: // Interrupt definition.
        !           105: //
        !           106: #define FD8XX_IDT_VECTOR    5
        !           107: 
        !           108: //
        !           109: // SCSI source identifier for host system.
        !           110: //
        !           111: #define SCSI_INITIATOR_ID   7
        !           112: 
        !           113: //
        !           114: // Various timeout values (in microseconds).
        !           115: //
        !           116: #define REQUEST_SPIN_WAIT   1000000 // Wait for target to assert REQUEST
        !           117: #define RESET_HOLD_TIME          25 // Time to hold RESET line to reset bus
        !           118: #define SELECTION_DELAY      100000 // Wait for target to assert BUSY
        !           119: #define RESELECTION_WAIT     100000 // Wait for target to de-assert BUSY
        !           120: #define ARBITRATION_DELAY         3 // Wait for arbitration complete
        !           121: #define FD8xx_TIMER_VALUE     10000 // Time for timer to fire
        !           122: 
        !           123: 
        !           124: //
        !           125: // Various limits...
        !           126: //
        !           127: 
        !           128: //
        !           129: // Number of adapters this driver will support.
        !           130: //
        !           131: #define MAX_ADAPTERS        4
        !           132: 
        !           133: //
        !           134: // Actually there is no limit to the transfer size, but since the I/O area
        !           135: // has to be mapped into memory for the transfer we restrict it to the
        !           136: // number below.
        !           137: //
        !           138: #define MAX_TRANSFER_LENGTH ( 64 * 1024 )
        !           139: 
        !           140: //
        !           141: // Size of the memory-mapped SCSI data register on the adapter.
        !           142: //
        !           143: #define MAX_BUFFER_LENGTH   0x200
        !           144: #define MAX_HEAD_LENGTH     0x10
        !           145: #define MAX_TAIL_LENGTH     0x01
        !           146: 
        !           147: //
        !           148: // Number of times to attempt arbitration before giving up.
        !           149: //
        !           150: #define MAX_ARB_ATTEMPTS    150
        !           151: 
        !           152: #define min(l, r)   (((l) < (r)) ? (l) : (r))

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