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  * For more information, please consult
  12  *
  13  * Trantor Systems, Ltd.
  14  * T128/T128F/T228 SCSI Host Adapter
  15  * Hardware Specifications
  16  *
  17  * Trantor Systems, Ltd.
  18  * 5415 Randall Place
  19  * Fremont, CA 94538
  20  * 1+ (415) 770-1400, FAX 1+ (415) 770-9910
  21  */
  22
  23 #ifndef T128_H
  24 #define T128_H
  25
  26 /*
  27  * The trantor boards are memory mapped. They use an NCR5380 or
  28  * equivalent (my sample board had part second sourced from ZILOG).
  29  * NCR's recommended "Pseudo-DMA" architecture is used, where
  30  * a PAL drives the DMA signals on the 5380 allowing fast, blind
  31  * transfers with proper handshaking.
  32  */
  33
  34 /*
  35  * Note : a boot switch is provided for the purpose of informing the
  36  * firmware to boot or not boot from attached SCSI devices.  So, I imagine
  37  * there are fewer people who've yanked the ROM like they do on the Seagate
  38  * to make bootup faster, and I'll probably use this for autodetection.
  39  */
  40 #define T_ROM_OFFSET            0
  41
  42 /*
  43  * Note : my sample board *WAS NOT* populated with the SRAM, so this
  44  * can't be used for autodetection without a ROM present.
  45  */
  46 #define T_RAM_OFFSET            0x1800
  47
  48 /*
  49  * All of the registers are allocated 32 bytes of address space, except
  50  * for the data register (read/write to/from the 5380 in pseudo-DMA mode)
  51  */
  52 #define T_CONTROL_REG_OFFSET    0x1c00  /* rw */
  53 #define T_CR_INT                0x10    /* Enable interrupts */
  54 #define T_CR_CT                 0x02    /* Reset watchdog timer */
  55
  56 #define T_STATUS_REG_OFFSET     0x1c20  /* ro */
  57 #define T_ST_BOOT               0x80    /* Boot switch */
  58 #define T_ST_S3                 0x40    /* User settable switches, */
  59 #define T_ST_S2                 0x20    /* read 0 when switch is on, 1 off */
  60 #define T_ST_S1                 0x10
  61 #define T_ST_PS2                0x08    /* Set for Microchannel 228 */
  62 #define T_ST_RDY                0x04    /* 5380 DRQ */
  63 #define T_ST_TIM                0x02    /* indicates 40us watchdog timer fired */
  64 #define T_ST_ZERO               0x01    /* Always zero */
  65
  66 #define T_5380_OFFSET           0x1d00  /* 8 registers here, see NCR5380.h */
  67
  68 #define T_DATA_REG_OFFSET       0x1e00  /* rw 512 bytes long */
  69
  70 #define NCR5380_implementation_fields \
  71     void __iomem *base
  72
  73 #define T128_address(reg) \
  74         (((struct NCR5380_hostdata *)shost_priv(instance))->base + T_5380_OFFSET + ((reg) * 0x20))
  75
  76 #define NCR5380_read(reg) readb(T128_address(reg))
  77 #define NCR5380_write(reg, value) writeb((value),(T128_address(reg)))
  78
  79 #define NCR5380_dma_xfer_len(instance, cmd, phase)      (cmd->transfersize)
  80
  81 #define NCR5380_intr t128_intr
  82 #define NCR5380_queue_command t128_queue_command
  83 #define NCR5380_abort t128_abort
  84 #define NCR5380_bus_reset t128_bus_reset
  85 #define NCR5380_info t128_info
  86 #define NCR5380_show_info t128_show_info
  87 #define NCR5380_write_info t128_write_info
  88
  89 /* 15 14 12 10 7 5 3
  90    1101 0100 1010 1000 */
  91
  92 #define T128_IRQS 0xc4a8
  93
  94 #endif /* T128_H */