drivers/scsi/t128.h

   1 /*
   2  * Trantor T128/T128F/T228 defines
   3  *      Note : architecturally, the T100 and T128 are different and won't work
   4  *
   5  * Copyright 1993, Drew Eckhardt
   6  *      Visionary Computing
   7  *      (Unix and Linux consulting and custom programming)
   8  *      drew@colorado.edu
   9  *      +1 (303) 440-4894
  10  *
  11  * DISTRIBUTION RELEASE 3.
  12  *
  13  * For more information, please consult
  14  *
  15  * Trantor Systems, Ltd.
  16  * T128/T128F/T228 SCSI Host Adapter
  17  * Hardware Specifications
  18  *
  19  * Trantor Systems, Ltd.
  20  * 5415 Randall Place
  21  * Fremont, CA 94538
  22  * 1+ (415) 770-1400, FAX 1+ (415) 770-9910
  23  *
  24  * and
  25  *
  26  * NCR 5380 Family
  27  * SCSI Protocol Controller
  28  * Databook
  29  *
  30  * NCR Microelectronics
  31  * 1635 Aeroplaza Drive
  32  * Colorado Springs, CO 80916
  33  * 1+ (719) 578-3400
  34  * 1+ (800) 334-5454
  35  */
  36
  37 #ifndef T128_H
  38 #define T128_H
  39
  40 #define T128_PUBLIC_RELEASE 3
  41
  42 #define TDEBUG          0
  43 #define TDEBUG_INIT     0x1
  44 #define TDEBUG_TRANSFER 0x2
  45
  46 /*
  47  * The trantor boards are memory mapped. They use an NCR5380 or
  48  * equivalent (my sample board had part second sourced from ZILOG).
  49  * NCR's recommended "Pseudo-DMA" architecture is used, where
  50  * a PAL drives the DMA signals on the 5380 allowing fast, blind
  51  * transfers with proper handshaking.
  52  */
  53
  54 /*
  55  * Note : a boot switch is provided for the purpose of informing the
  56  * firmware to boot or not boot from attached SCSI devices.  So, I imagine
  57  * there are fewer people who've yanked the ROM like they do on the Seagate
  58  * to make bootup faster, and I'll probably use this for autodetection.
  59  */
  60 #define T_ROM_OFFSET            0
  61
  62 /*
  63  * Note : my sample board *WAS NOT* populated with the SRAM, so this
  64  * can't be used for autodetection without a ROM present.
  65  */
  66 #define T_RAM_OFFSET            0x1800
  67
  68 /*
  69  * All of the registers are allocated 32 bytes of address space, except
  70  * for the data register (read/write to/from the 5380 in pseudo-DMA mode)
  71  */
  72 #define T_CONTROL_REG_OFFSET    0x1c00  /* rw */
  73 #define T_CR_INT                0x10    /* Enable interrupts */
  74 #define T_CR_CT                 0x02    /* Reset watchdog timer */
  75
  76 #define T_STATUS_REG_OFFSET     0x1c20  /* ro */
  77 #define T_ST_BOOT               0x80    /* Boot switch */
  78 #define T_ST_S3                 0x40    /* User settable switches, */
  79 #define T_ST_S2                 0x20    /* read 0 when switch is on, 1 off */
  80 #define T_ST_S1                 0x10
  81 #define T_ST_PS2                0x08    /* Set for Microchannel 228 */
  82 #define T_ST_RDY                0x04    /* 5380 DRQ */
  83 #define T_ST_TIM                0x02    /* indicates 40us watchdog timer fired */
  84 #define T_ST_ZERO               0x01    /* Always zero */
  85
  86 #define T_5380_OFFSET           0x1d00  /* 8 registers here, see NCR5380.h */
  87
  88 #define T_DATA_REG_OFFSET       0x1e00  /* rw 512 bytes long */
  89
  90 #ifndef ASM
  91 static int t128_abort(struct scsi_cmnd *);
  92 static int t128_biosparam(struct scsi_device *, struct block_device *,
  93                           sector_t, int*);
  94 static int t128_detect(struct scsi_host_template *);
  95 static int t128_queue_command(struct Scsi_Host *, struct scsi_cmnd *);
  96 static int t128_bus_reset(struct scsi_cmnd *);
  97
  98 #ifndef CMD_PER_LUN
  99 #define CMD_PER_LUN 2
 100 #endif
 101
 102 #ifndef CAN_QUEUE
 103 #define CAN_QUEUE 32
 104 #endif
 105
 106 #define NCR5380_implementation_fields \
 107     void __iomem *base
 108
 109 #define NCR5380_local_declare() \
 110     void __iomem *base
 111
 112 #define NCR5380_setup(instance) \
 113     base = ((struct NCR5380_hostdata *)(instance->hostdata))->base
 114
 115 #define T128_address(reg) (base + T_5380_OFFSET + ((reg) * 0x20))
 116
 117 #if !(TDEBUG & TDEBUG_TRANSFER)
 118 #define NCR5380_read(reg) readb(T128_address(reg))
 119 #define NCR5380_write(reg, value) writeb((value),(T128_address(reg)))
 120 #else
 121 #define NCR5380_read(reg)                                               \
 122     (((unsigned char) printk("scsi%d : read register %d at address %08x\n"\
 123     , instance->hostno, (reg), T128_address(reg))), readb(T128_address(reg)))
 124
 125 #define NCR5380_write(reg, value) {                                     \
 126     printk("scsi%d : write %02x to register %d at address %08x\n",      \
 127             instance->hostno, (value), (reg), T128_address(reg));       \
 128     writeb((value), (T128_address(reg)));                               \
 129 }
 130 #endif
 131
 132 #define NCR5380_intr t128_intr
 133 #define do_NCR5380_intr do_t128_intr
 134 #define NCR5380_queue_command t128_queue_command
 135 #define NCR5380_abort t128_abort
 136 #define NCR5380_bus_reset t128_bus_reset
 137 #define NCR5380_show_info t128_show_info
 138 #define NCR5380_write_info t128_write_info
 139
 140 /* 15 14 12 10 7 5 3
 141    1101 0100 1010 1000 */
 142
 143 #define T128_IRQS 0xc4a8
 144
 145 #endif /* ndef ASM */
 146 #endif /* T128_H */