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Annotation of Gnu-Mach/i386/i386at/gpl/linux/scsi/pas16.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * This driver adapted from Drew Eckhardt's Trantor T128 driver
        !             3:  *
        !             4:  * Copyright 1993, Drew Eckhardt
        !             5:  *     Visionary Computing
        !             6:  *     (Unix and Linux consulting and custom programming)
        !             7:  *     [email protected]
        !             8:  *      +1 (303) 666-5836
        !             9:  *
        !            10:  *  ( Based on T128 - DISTRIBUTION RELEASE 3. ) 
        !            11:  *
        !            12:  * Modified to work with the Pro Audio Spectrum/Studio 16
        !            13:  * by John Weidman.
        !            14:  *
        !            15:  *
        !            16:  * For more information, please consult 
        !            17:  *
        !            18:  * Media Vision
        !            19:  * (510) 770-8600
        !            20:  * (800) 348-7116
        !            21:  * 
        !            22:  * and 
        !            23:  *
        !            24:  * NCR 5380 Family
        !            25:  * SCSI Protocol Controller
        !            26:  * Databook
        !            27:  *
        !            28:  * NCR Microelectronics
        !            29:  * 1635 Aeroplaza Drive
        !            30:  * Colorado Springs, CO 80916
        !            31:  * 1+ (719) 578-3400
        !            32:  * 1+ (800) 334-5454
        !            33:  */
        !            34: 
        !            35: 
        !            36: #ifndef PAS16_H
        !            37: #define PAS16_H
        !            38: 
        !            39: #define PAS16_PUBLIC_RELEASE 3
        !            40: 
        !            41: #define PDEBUG_INIT    0x1
        !            42: #define PDEBUG_TRANSFER 0x2
        !            43: 
        !            44: #define PAS16_DEFAULT_BASE_1  0x388
        !            45: #define PAS16_DEFAULT_BASE_2  0x384
        !            46: #define PAS16_DEFAULT_BASE_3  0x38c
        !            47: #define PAS16_DEFAULT_BASE_4  0x288
        !            48: 
        !            49: #define PAS16_DEFAULT_BOARD_1_IRQ 10
        !            50: #define PAS16_DEFAULT_BOARD_2_IRQ 12
        !            51: #define PAS16_DEFAULT_BOARD_3_IRQ 14
        !            52: #define PAS16_DEFAULT_BOARD_4_IRQ 15
        !            53: 
        !            54: 
        !            55: /*
        !            56:  * The Pro Audio Spectrum boards are I/O mapped. They use a Zilog 5380
        !            57:  * SCSI controller, which is the equivalent of NCR's 5380.  "Pseudo-DMA"
        !            58:  * architecture is used, where a PAL drives the DMA signals on the 5380
        !            59:  * allowing fast, blind transfers with proper handshaking. 
        !            60:  */
        !            61: 
        !            62: 
        !            63: /* The Time-out Counter register is used to safe-guard against a stuck
        !            64:  * bus (in the case of RDY driven handshake) or a stuck byte (if 16-Bit
        !            65:  * DMA conversion is used).  The counter uses a 28.224MHz clock
        !            66:  * divided by 14 as its clock source.  In the case of a stuck byte in
        !            67:  * the holding register, an interrupt is generated (and mixed with the
        !            68:  * one with the drive) using the CD-ROM interrupt pointer.
        !            69:  */
        !            70:  
        !            71: #define P_TIMEOUT_COUNTER_REG  0x4000
        !            72: #define P_TC_DISABLE   0x80    /* Set to 0 to enable timeout int. */
        !            73:                                /* Bits D6-D0 contain timeout count */
        !            74: 
        !            75: 
        !            76: #define P_TIMEOUT_STATUS_REG_OFFSET    0x4001
        !            77: #define P_TS_TIM               0x80    /* check timeout status */
        !            78:                                        /* Bits D6-D4 N/U */
        !            79: #define P_TS_ARM_DRQ_INT       0x08    /* Arm DRQ Int.  When set high,
        !            80:                                         * the next rising edge will
        !            81:                                         * cause a CD-ROM interrupt.
        !            82:                                         * When set low, the interrupt
        !            83:                                         * will be cleared.  There is
        !            84:                                         * no status available for
        !            85:                                         * this interrupt.
        !            86:                                         */
        !            87: #define P_TS_ENABLE_TO_ERR_INTERRUPT   /* Enable timeout error int. */
        !            88: #define P_TS_ENABLE_WAIT               /* Enable Wait */
        !            89: 
        !            90: #define P_TS_CT                        0x01    /* clear timeout. Note: writing
        !            91:                                         * to this register clears the
        !            92:                                         * timeout error int. or status
        !            93:                                         */
        !            94: 
        !            95: 
        !            96: /*
        !            97:  * The data register reads/writes to/from the 5380 in pseudo-DMA mode
        !            98:  */ 
        !            99: 
        !           100: #define P_DATA_REG_OFFSET      0x5c00  /* rw */
        !           101: 
        !           102: #define P_STATUS_REG_OFFSET    0x5c01  /* ro */
        !           103: #define P_ST_RDY               0x80    /* 5380 DDRQ Status */
        !           104: 
        !           105: #define P_IRQ_STATUS           0x5c03
        !           106: #define P_IS_IRQ               0x80    /* DIRQ status */
        !           107: 
        !           108: #define PCB_CONFIG 0x803
        !           109: #define MASTER_ADDRESS_PTR 0x9a01  /* Fixed position - no relo */
        !           110: #define SYS_CONFIG_4 0x8003
        !           111: #define WAIT_STATE 0xbc00
        !           112: #define OPERATION_MODE_1 0xec03
        !           113: #define IO_CONFIG_3 0xf002
        !           114: 
        !           115: 
        !           116: #ifndef ASM
        !           117: int pas16_abort(Scsi_Cmnd *);
        !           118: int pas16_biosparam(Disk *, kdev_t, int*);
        !           119: int pas16_detect(Scsi_Host_Template *);
        !           120: int pas16_queue_command(Scsi_Cmnd *, void (*done)(Scsi_Cmnd *));
        !           121: int pas16_reset(Scsi_Cmnd *);
        !           122: 
        !           123: #ifndef NULL
        !           124: #define NULL 0
        !           125: #endif
        !           126: 
        !           127: #ifndef CMD_PER_LUN
        !           128: #define CMD_PER_LUN 2
        !           129: #endif
        !           130: 
        !           131: #ifndef CAN_QUEUE
        !           132: #define CAN_QUEUE 32 
        !           133: #endif
        !           134: 
        !           135: /* 
        !           136:  * I hadn't thought of this with the earlier drivers - but to prevent
        !           137:  * macro definition conflicts, we shouldn't define all of the internal
        !           138:  * macros when this is being used solely for the host stub.
        !           139:  */
        !           140: 
        !           141: #if defined(HOSTS_C) || defined(MODULE)
        !           142: 
        !           143: #define MV_PAS16 {NULL, NULL, NULL, NULL, \
        !           144:        "Pro Audio Spectrum-16 SCSI",           \
        !           145:        pas16_detect, NULL, NULL,                                       \
        !           146:        NULL, pas16_queue_command, pas16_abort, pas16_reset, NULL,      \
        !           147:        pas16_biosparam,                                                \
        !           148:        /* can queue */ CAN_QUEUE, /* id */ 7, SG_ALL,                  \
        !           149:        /* cmd per lun */ CMD_PER_LUN , 0, 0, DISABLE_CLUSTERING}
        !           150: 
        !           151: #endif
        !           152: #ifndef HOSTS_C
        !           153: 
        !           154: #define NCR5380_implementation_fields \
        !           155:     volatile unsigned short io_port
        !           156: 
        !           157: #define NCR5380_local_declare() \
        !           158:     volatile unsigned short io_port
        !           159: 
        !           160: #define NCR5380_setup(instance) \
        !           161:     io_port = (instance)->io_port
        !           162: 
        !           163: #define PAS16_io_port(reg) ( io_port + pas16_offset[(reg)] )
        !           164: 
        !           165: #if !(PDEBUG & PDEBUG_TRANSFER) 
        !           166: #define NCR5380_read(reg) ( inb(PAS16_io_port(reg)) )
        !           167: #define NCR5380_write(reg, value) ( outb((value),PAS16_io_port(reg)) )
        !           168: #else
        !           169: #define NCR5380_read(reg)                                              \
        !           170:     (((unsigned char) printk("scsi%d : read register %d at io_port %04x\n"\
        !           171:     , instance->hostno, (reg), PAS16_io_port(reg))), inb( PAS16_io_port(reg)) )
        !           172: 
        !           173: #define NCR5380_write(reg, value)                                      \
        !           174:     (printk("scsi%d : write %02x to register %d at io_port %04x\n",    \
        !           175:            instance->hostno, (value), (reg), PAS16_io_port(reg)),      \
        !           176:     outb( (value),PAS16_io_port(reg) ) )
        !           177: 
        !           178: #endif
        !           179: 
        !           180: 
        !           181: #define NCR5380_intr pas16_intr
        !           182: #define NCR5380_queue_command pas16_queue_command
        !           183: #define NCR5380_abort pas16_abort
        !           184: #define NCR5380_reset pas16_reset
        !           185: 
        !           186: /* 15 14 12 10 7 5 3 
        !           187:    1101 0100 1010 1000 */
        !           188:    
        !           189: #define PAS16_IRQS 0xd4a8 
        !           190: 
        !           191: #endif /* else def HOSTS_C */
        !           192: #endif /* ndef ASM */
        !           193: #endif /* PAS16_H */

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