drivers/scsi/sun3_scsi.h

   1 /*
   2  * Sun3 SCSI stuff by Erik Verbruggen (erik@bigmama.xtdnet.nl)
   3  *
   4  * Sun3 DMA additions by Sam Creasey (sammy@sammy.net)
   5  *
   6  * Adapted from mac_scsinew.h:
   7  */
   8 /*
   9  * Cumana Generic NCR5380 driver defines
  10  *
  11  * Copyright 1993, Drew Eckhardt
  12  *      Visionary Computing
  13  *      (Unix and Linux consulting and custom programming)
  14  *      drew@colorado.edu
  15  *      +1 (303) 440-4894
  16  *
  17  * ALPHA RELEASE 1.
  18  *
  19  * For more information, please consult
  20  *
  21  * NCR 5380 Family
  22  * SCSI Protocol Controller
  23  * Databook
  24  *
  25  * NCR Microelectronics
  26  * 1635 Aeroplaza Drive
  27  * Colorado Springs, CO 80916
  28  * 1+ (719) 578-3400
  29  * 1+ (800) 334-5454
  30  */
  31
  32 #ifndef SUN3_SCSI_H
  33 #define SUN3_SCSI_H
  34
  35 #define SUN3SCSI_PUBLIC_RELEASE 1
  36
  37 /*
  38  * Int: level 2 autovector
  39  * IO: type 1, base 0x00140000, 5 bits phys space: A<4..0>
  40  */
  41 #define IRQ_SUN3_SCSI 2
  42 #define IOBASE_SUN3_SCSI 0x00140000
  43
  44 #define IOBASE_SUN3_VMESCSI 0xff200000
  45
  46 static int sun3scsi_abort(struct scsi_cmnd *);
  47 static int sun3scsi_detect (struct scsi_host_template *);
  48 static const char *sun3scsi_info (struct Scsi_Host *);
  49 static int sun3scsi_bus_reset(struct scsi_cmnd *);
  50 static int sun3scsi_queue_command(struct Scsi_Host *, struct scsi_cmnd *);
  51 static int sun3scsi_release (struct Scsi_Host *);
  52
  53 #ifndef CMD_PER_LUN
  54 #define CMD_PER_LUN 2
  55 #endif
  56
  57 #ifndef CAN_QUEUE
  58 #define CAN_QUEUE 16
  59 #endif
  60
  61 #ifndef SG_TABLESIZE
  62 #define SG_TABLESIZE SG_NONE
  63 #endif
  64
  65 #ifndef MAX_TAGS
  66 #define MAX_TAGS 32
  67 #endif
  68
  69 #ifndef USE_TAGGED_QUEUING
  70 #define USE_TAGGED_QUEUING 1
  71 #endif
  72
  73 #include <scsi/scsicam.h>
  74
  75 #ifdef SUN3_SCSI_VME
  76 #define SUN3_SCSI_NAME "Sun3 NCR5380 VME SCSI"
  77 #else
  78 #define SUN3_SCSI_NAME "Sun3 NCR5380 SCSI"
  79 #endif
  80
  81 #define NCR5380_implementation_fields \
  82     int port, ctrl
  83
  84 #define NCR5380_local_declare() \
  85         struct Scsi_Host *_instance
  86
  87 #define NCR5380_setup(instance) \
  88         _instance = instance
  89
  90 #define NCR5380_read(reg) sun3scsi_read(reg)
  91 #define NCR5380_write(reg, value) sun3scsi_write(reg, value)
  92
  93 #define NCR5380_intr sun3scsi_intr
  94 #define NCR5380_queue_command sun3scsi_queue_command
  95 #define NCR5380_bus_reset sun3scsi_bus_reset
  96 #define NCR5380_abort sun3scsi_abort
  97 #define NCR5380_show_info sun3scsi_show_info
  98 #define NCR5380_dma_xfer_len(i, cmd, phase) \
  99         sun3scsi_dma_xfer_len(cmd->SCp.this_residual,cmd,((phase) & SR_IO) ? 0 : 1)
 100
 101 #define NCR5380_dma_write_setup(instance, data, count) sun3scsi_dma_setup(data, count, 1)
 102 #define NCR5380_dma_read_setup(instance, data, count) sun3scsi_dma_setup(data, count, 0)
 103 #define NCR5380_dma_residual sun3scsi_dma_residual
 104
 105 /* additional registers - mainly DMA control regs */
 106 /* these start at regbase + 8 -- directly after the NCR regs */
 107 struct sun3_dma_regs {
 108         unsigned short dma_addr_hi; /* vme only */
 109         unsigned short dma_addr_lo; /* vme only */
 110         unsigned short dma_count_hi; /* vme only */
 111         unsigned short dma_count_lo; /* vme only */
 112         unsigned short udc_data; /* udc dma data reg (obio only) */
 113         unsigned short udc_addr; /* uda dma addr reg (obio only) */
 114         unsigned short fifo_data; /* fifo data reg, holds extra byte on
 115                                      odd dma reads */
 116         unsigned short fifo_count;
 117         unsigned short csr; /* control/status reg */
 118         unsigned short bpack_hi; /* vme only */
 119         unsigned short bpack_lo; /* vme only */
 120         unsigned short ivect; /* vme only */
 121         unsigned short fifo_count_hi; /* vme only */
 122 };
 123
 124 /* ucd chip specific regs - live in dvma space */
 125 struct sun3_udc_regs {
 126      unsigned short rsel; /* select regs to load */
 127      unsigned short addr_hi; /* high word of addr */
 128      unsigned short addr_lo; /* low word */
 129      unsigned short count; /* words to be xfer'd */
 130      unsigned short mode_hi; /* high word of channel mode */
 131      unsigned short mode_lo; /* low word of channel mode */
 132 };
 133
 134 /* addresses of the udc registers */
 135 #define UDC_MODE 0x38
 136 #define UDC_CSR 0x2e /* command/status */
 137 #define UDC_CHN_HI 0x26 /* chain high word */
 138 #define UDC_CHN_LO 0x22 /* chain lo word */
 139 #define UDC_CURA_HI 0x1a /* cur reg A high */
 140 #define UDC_CURA_LO 0x0a /* cur reg A low */
 141 #define UDC_CURB_HI 0x12 /* cur reg B high */
 142 #define UDC_CURB_LO 0x02 /* cur reg B low */
 143 #define UDC_MODE_HI 0x56 /* mode reg high */
 144 #define UDC_MODE_LO 0x52 /* mode reg low */
 145 #define UDC_COUNT 0x32 /* words to xfer */
 146
 147 /* some udc commands */
 148 #define UDC_RESET 0
 149 #define UDC_CHN_START 0xa0 /* start chain */
 150 #define UDC_INT_ENABLE 0x32 /* channel 1 int on */
 151
 152 /* udc mode words */
 153 #define UDC_MODE_HIWORD 0x40
 154 #define UDC_MODE_LSEND 0xc2
 155 #define UDC_MODE_LRECV 0xd2
 156
 157 /* udc reg selections */
 158 #define UDC_RSEL_SEND 0x282
 159 #define UDC_RSEL_RECV 0x182
 160
 161 /* bits in csr reg */
 162 #define CSR_DMA_ACTIVE 0x8000
 163 #define CSR_DMA_CONFLICT 0x4000
 164 #define CSR_DMA_BUSERR 0x2000
 165
 166 #define CSR_FIFO_EMPTY 0x400 /* fifo flushed? */
 167 #define CSR_SDB_INT 0x200 /* sbc interrupt pending */
 168 #define CSR_DMA_INT 0x100 /* dma interrupt pending */
 169
 170 #define CSR_LEFT 0xc0
 171 #define CSR_LEFT_3 0xc0
 172 #define CSR_LEFT_2 0x80
 173 #define CSR_LEFT_1 0x40
 174 #define CSR_PACK_ENABLE 0x20
 175
 176 #define CSR_DMA_ENABLE 0x10
 177
 178 #define CSR_SEND 0x8 /* 1 = send  0 = recv */
 179 #define CSR_FIFO 0x2 /* reset fifo */
 180 #define CSR_INTR 0x4 /* interrupt enable */
 181 #define CSR_SCSI 0x1
 182
 183 #define VME_DATA24 0x3d00
 184
 185 #endif /* SUN3_SCSI_H */
 186