drivers/scsi/wd33c93.h

   1 /*
   2  *    wd33c93.h -  Linux device driver definitions for the
   3  *                 Commodore Amiga A2091/590 SCSI controller card
   4  *
   5  *    IMPORTANT: This file is for version 1.25 - 09/Jul/1997
   6  *
   7  * Copyright (c) 1996 John Shifflett, GeoLog Consulting
   8  *    john@geolog.com
   9  *    jshiffle@netcom.com
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2, or (at your option)
  14  * any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  */
  22 #ifndef WD33C93_H
  23 #define WD33C93_H
  24
  25
  26 #define PROC_INTERFACE     /* add code for /proc/scsi/wd33c93/xxx interface */
  27 #ifdef  PROC_INTERFACE
  28 #define PROC_STATISTICS    /* add code for keeping various real time stats */
  29 #endif
  30
  31 #define SYNC_DEBUG         /* extra info on sync negotiation printed */
  32 #define DEBUGGING_ON       /* enable command-line debugging bitmask */
  33 #define DEBUG_DEFAULTS 0   /* default debugging bitmask */
  34
  35
  36 #ifdef DEBUGGING_ON
  37 #define DB(f,a) if (hostdata->args & (f)) a;
  38 #else
  39 #define DB(f,a)
  40 #endif
  41
  42 #define uchar unsigned char
  43
  44
  45 /* wd register names */
  46 #define WD_OWN_ID    0x00
  47 #define WD_CONTROL      0x01
  48 #define WD_TIMEOUT_PERIOD  0x02
  49 #define WD_CDB_1     0x03
  50 #define WD_CDB_2     0x04
  51 #define WD_CDB_3     0x05
  52 #define WD_CDB_4     0x06
  53 #define WD_CDB_5     0x07
  54 #define WD_CDB_6     0x08
  55 #define WD_CDB_7     0x09
  56 #define WD_CDB_8     0x0a
  57 #define WD_CDB_9     0x0b
  58 #define WD_CDB_10    0x0c
  59 #define WD_CDB_11    0x0d
  60 #define WD_CDB_12    0x0e
  61 #define WD_TARGET_LUN      0x0f
  62 #define WD_COMMAND_PHASE   0x10
  63 #define WD_SYNCHRONOUS_TRANSFER 0x11
  64 #define WD_TRANSFER_COUNT_MSB 0x12
  65 #define WD_TRANSFER_COUNT  0x13
  66 #define WD_TRANSFER_COUNT_LSB 0x14
  67 #define WD_DESTINATION_ID  0x15
  68 #define WD_SOURCE_ID    0x16
  69 #define WD_SCSI_STATUS     0x17
  70 #define WD_COMMAND      0x18
  71 #define WD_DATA      0x19
  72 #define WD_QUEUE_TAG    0x1a
  73 #define WD_AUXILIARY_STATUS   0x1f
  74
  75 /* WD commands */
  76 #define WD_CMD_RESET    0x00
  77 #define WD_CMD_ABORT    0x01
  78 #define WD_CMD_ASSERT_ATN  0x02
  79 #define WD_CMD_NEGATE_ACK  0x03
  80 #define WD_CMD_DISCONNECT  0x04
  81 #define WD_CMD_RESELECT    0x05
  82 #define WD_CMD_SEL_ATN     0x06
  83 #define WD_CMD_SEL      0x07
  84 #define WD_CMD_SEL_ATN_XFER   0x08
  85 #define WD_CMD_SEL_XFER    0x09
  86 #define WD_CMD_RESEL_RECEIVE  0x0a
  87 #define WD_CMD_RESEL_SEND  0x0b
  88 #define WD_CMD_WAIT_SEL_RECEIVE 0x0c
  89 #define WD_CMD_TRANS_ADDR  0x18
  90 #define WD_CMD_TRANS_INFO  0x20
  91 #define WD_CMD_TRANSFER_PAD   0x21
  92 #define WD_CMD_SBT_MODE    0x80
  93
  94 /* ASR register */
  95 #define ASR_INT         (0x80)
  96 #define ASR_LCI         (0x40)
  97 #define ASR_BSY         (0x20)
  98 #define ASR_CIP         (0x10)
  99 #define ASR_PE          (0x02)
 100 #define ASR_DBR         (0x01)
 101
 102 /* SCSI Bus Phases */
 103 #define PHS_DATA_OUT    0x00
 104 #define PHS_DATA_IN     0x01
 105 #define PHS_COMMAND     0x02
 106 #define PHS_STATUS      0x03
 107 #define PHS_MESS_OUT    0x06
 108 #define PHS_MESS_IN     0x07
 109
 110 /* Command Status Register definitions */
 111
 112   /* reset state interrupts */
 113 #define CSR_RESET    0x00
 114 #define CSR_RESET_AF    0x01
 115
 116   /* successful completion interrupts */
 117 #define CSR_RESELECT    0x10
 118 #define CSR_SELECT      0x11
 119 #define CSR_SEL_XFER_DONE  0x16
 120 #define CSR_XFER_DONE      0x18
 121
 122   /* paused or aborted interrupts */
 123 #define CSR_MSGIN    0x20
 124 #define CSR_SDP         0x21
 125 #define CSR_SEL_ABORT      0x22
 126 #define CSR_RESEL_ABORT    0x25
 127 #define CSR_RESEL_ABORT_AM 0x27
 128 #define CSR_ABORT    0x28
 129
 130   /* terminated interrupts */
 131 #define CSR_INVALID     0x40
 132 #define CSR_UNEXP_DISC     0x41
 133 #define CSR_TIMEOUT     0x42
 134 #define CSR_PARITY      0x43
 135 #define CSR_PARITY_ATN     0x44
 136 #define CSR_BAD_STATUS     0x45
 137 #define CSR_UNEXP    0x48
 138
 139   /* service required interrupts */
 140 #define CSR_RESEL    0x80
 141 #define CSR_RESEL_AM    0x81
 142 #define CSR_DISC     0x85
 143 #define CSR_SRV_REQ     0x88
 144
 145    /* Own ID/CDB Size register */
 146 #define OWNID_EAF    0x08
 147 #define OWNID_EHP    0x10
 148 #define OWNID_RAF    0x20
 149 #define OWNID_FS_8   0x00
 150 #define OWNID_FS_12  0x40
 151 #define OWNID_FS_16  0x80
 152
 153    /* define these so we don't have to change a2091.c, etc. */
 154 #define WD33C93_FS_8_10  OWNID_FS_8
 155 #define WD33C93_FS_12_15 OWNID_FS_12
 156 #define WD33C93_FS_16_20 OWNID_FS_16
 157
 158    /* pass input-clock explicitly. accepted mhz values are 8-10,12-20 */
 159 #define WD33C93_FS_MHZ(mhz) (mhz)
 160
 161    /* Control register */
 162 #define CTRL_HSP     0x01
 163 #define CTRL_HA      0x02
 164 #define CTRL_IDI     0x04
 165 #define CTRL_EDI     0x08
 166 #define CTRL_HHP     0x10
 167 #define CTRL_POLLED  0x00
 168 #define CTRL_BURST   0x20
 169 #define CTRL_BUS     0x40
 170 #define CTRL_DMA     0x80
 171
 172    /* Timeout Period register */
 173 #define TIMEOUT_PERIOD_VALUE  20    /* 20 = 200 ms */
 174
 175    /* Synchronous Transfer Register */
 176 #define STR_FSS      0x80
 177
 178    /* Destination ID register */
 179 #define DSTID_DPD    0x40
 180 #define DATA_OUT_DIR 0
 181 #define DATA_IN_DIR  1
 182 #define DSTID_SCC    0x80
 183
 184    /* Source ID register */
 185 #define SRCID_MASK   0x07
 186 #define SRCID_SIV    0x08
 187 #define SRCID_DSP    0x20
 188 #define SRCID_ES     0x40
 189 #define SRCID_ER     0x80
 190
 191    /* This is what the 3393 chip looks like to us */
 192 typedef struct {
 193 #ifdef CONFIG_WD33C93_PIO
 194    unsigned int   SASR;
 195    unsigned int   SCMD;
 196 #else
 197    volatile unsigned char  *SASR;
 198    volatile unsigned char  *SCMD;
 199 #endif
 200 } wd33c93_regs;
 201
 202
 203 typedef int (*dma_setup_t) (struct scsi_cmnd *SCpnt, int dir_in);
 204 typedef void (*dma_stop_t) (struct Scsi_Host *instance,
 205                 struct scsi_cmnd *SCpnt, int status);
 206
 207
 208 #define ILLEGAL_STATUS_BYTE   0xff
 209
 210 #define DEFAULT_SX_PER   376     /* (ns) fairly safe */
 211 #define DEFAULT_SX_OFF   0       /* aka async */
 212
 213 #define OPTIMUM_SX_PER   252     /* (ns) best we can do (mult-of-4) */
 214 #define OPTIMUM_SX_OFF   12      /* size of wd3393 fifo */
 215
 216 struct sx_period {
 217    unsigned int   period_ns;
 218    uchar          reg_value;
 219    };
 220
 221 /* FEF: defines for hostdata->dma_buffer_pool */
 222
 223 #define BUF_CHIP_ALLOCED 0
 224 #define BUF_SCSI_ALLOCED 1
 225
 226 struct WD33C93_hostdata {
 227     struct Scsi_Host *next;
 228     wd33c93_regs     regs;
 229     spinlock_t       lock;
 230     uchar            clock_freq;
 231     uchar            chip;             /* what kind of wd33c93? */
 232     uchar            microcode;        /* microcode rev */
 233     uchar            dma_buffer_pool;  /* FEF: buffer from chip_ram? */
 234     int              dma_dir;          /* data transfer dir. */
 235     dma_setup_t      dma_setup;
 236     dma_stop_t       dma_stop;
 237     unsigned int     dma_xfer_mask;
 238     uchar            *dma_bounce_buffer;
 239     unsigned int     dma_bounce_len;
 240     volatile uchar   busy[8];          /* index = target, bit = lun */
 241     volatile struct scsi_cmnd *input_Q;       /* commands waiting to be started */
 242     volatile struct scsi_cmnd *selecting;     /* trying to select this command */
 243     volatile struct scsi_cmnd *connected;     /* currently connected command */
 244     volatile struct scsi_cmnd *disconnected_Q;/* commands waiting for reconnect */
 245     uchar            state;            /* what we are currently doing */
 246     uchar            dma;              /* current state of DMA (on/off) */
 247     uchar            level2;           /* extent to which Level-2 commands are used */
 248     uchar            disconnect;       /* disconnect/reselect policy */
 249     unsigned int     args;             /* set from command-line argument */
 250     uchar            incoming_msg[8];  /* filled during message_in phase */
 251     int              incoming_ptr;     /* mainly used with EXTENDED messages */
 252     uchar            outgoing_msg[8];  /* send this during next message_out */
 253     int              outgoing_len;     /* length of outgoing message */
 254     unsigned int     default_sx_per;   /* default transfer period for SCSI bus */
 255     uchar            sync_xfer[8];     /* sync_xfer reg settings per target */
 256     uchar            sync_stat[8];     /* status of sync negotiation per target */
 257     uchar            no_sync;          /* bitmask: don't do sync on these targets */
 258     uchar            no_dma;           /* set this flag to disable DMA */
 259     uchar            dma_mode;         /* DMA Burst Mode or Single Byte DMA */
 260     uchar            fast;             /* set this flag to enable Fast SCSI */
 261     struct sx_period sx_table[9];      /* transfer periods for actual DTC-setting */
 262 #ifdef PROC_INTERFACE
 263     uchar            proc;             /* bitmask: what's in proc output */
 264 #ifdef PROC_STATISTICS
 265     unsigned long    cmd_cnt[8];       /* # of commands issued per target */
 266     unsigned long    int_cnt;          /* # of interrupts serviced */
 267     unsigned long    pio_cnt;          /* # of pio data transfers */
 268     unsigned long    dma_cnt;          /* # of DMA data transfers */
 269     unsigned long    disc_allowed_cnt[8]; /* # of disconnects allowed per target */
 270     unsigned long    disc_done_cnt[8]; /* # of disconnects done per target*/
 271 #endif
 272 #endif
 273     };
 274
 275
 276 /* defines for hostdata->chip */
 277
 278 #define C_WD33C93       0
 279 #define C_WD33C93A      1
 280 #define C_WD33C93B      2
 281 #define C_UNKNOWN_CHIP  100
 282
 283 /* defines for hostdata->state */
 284
 285 #define S_UNCONNECTED         0
 286 #define S_SELECTING           1
 287 #define S_RUNNING_LEVEL2      2
 288 #define S_CONNECTED           3
 289 #define S_PRE_TMP_DISC        4
 290 #define S_PRE_CMP_DISC        5
 291
 292 /* defines for hostdata->dma */
 293
 294 #define D_DMA_OFF          0
 295 #define D_DMA_RUNNING      1
 296
 297 /* defines for hostdata->level2 */
 298 /* NOTE: only the first 3 are implemented so far */
 299
 300 #define L2_NONE      1  /* no combination commands - we get lots of ints */
 301 #define L2_SELECT    2  /* start with SEL_ATN_XFER, but never resume it */
 302 #define L2_BASIC     3  /* resume after STATUS ints & RDP messages */
 303 #define L2_DATA      4  /* resume after DATA_IN/OUT ints */
 304 #define L2_MOST      5  /* resume after anything except a RESELECT int */
 305 #define L2_RESELECT  6  /* resume after everything, including RESELECT ints */
 306 #define L2_ALL       7  /* always resume */
 307
 308 /* defines for hostdata->disconnect */
 309
 310 #define DIS_NEVER    0
 311 #define DIS_ADAPTIVE 1
 312 #define DIS_ALWAYS   2
 313
 314 /* defines for hostdata->args */
 315
 316 #define DB_TEST1              1<<0
 317 #define DB_TEST2              1<<1
 318 #define DB_QUEUE_COMMAND      1<<2
 319 #define DB_EXECUTE            1<<3
 320 #define DB_INTR               1<<4
 321 #define DB_TRANSFER           1<<5
 322 #define DB_MASK               0x3f
 323
 324 /* defines for hostdata->sync_stat[] */
 325
 326 #define SS_UNSET     0
 327 #define SS_FIRST     1
 328 #define SS_WAITING   2
 329 #define SS_SET       3
 330
 331 /* defines for hostdata->proc */
 332
 333 #define PR_VERSION   1<<0
 334 #define PR_INFO      1<<1
 335 #define PR_STATISTICS 1<<2
 336 #define PR_CONNECTED 1<<3
 337 #define PR_INPUTQ    1<<4
 338 #define PR_DISCQ     1<<5
 339 #define PR_TEST      1<<6
 340 #define PR_STOP      1<<7
 341
 342
 343 void wd33c93_init (struct Scsi_Host *instance, const wd33c93_regs regs,
 344          dma_setup_t setup, dma_stop_t stop, int clock_freq);
 345 int wd33c93_abort (struct scsi_cmnd *cmd);
 346 int wd33c93_queuecommand (struct Scsi_Host *h, struct scsi_cmnd *cmd);
 347 void wd33c93_intr (struct Scsi_Host *instance);
 348 int wd33c93_show_info(struct seq_file *, struct Scsi_Host *);
 349 int wd33c93_write_info(struct Scsi_Host *, char *, int);
 350 int wd33c93_host_reset (struct scsi_cmnd *);
 351
 352 #endif /* WD33C93_H */