drivers/scsi/wd33c93.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  *    wd33c93.h -  Linux device driver definitions for the
   4  *                 Commodore Amiga A2091/590 SCSI controller card
   5  *
   6  *    IMPORTANT: This file is for version 1.25 - 09/Jul/1997
   7  *
   8  * Copyright (c) 1996 John Shifflett, GeoLog Consulting
   9  *    john@geolog.com
  10  *    jshiffle@netcom.com
  11  */
  12 #ifndef WD33C93_H
  13 #define WD33C93_H
  14
  15
  16 #define PROC_INTERFACE     /* add code for /proc/scsi/wd33c93/xxx interface */
  17 #ifdef  PROC_INTERFACE
  18 #define PROC_STATISTICS    /* add code for keeping various real time stats */
  19 #endif
  20
  21 #define SYNC_DEBUG         /* extra info on sync negotiation printed */
  22 #define DEBUGGING_ON       /* enable command-line debugging bitmask */
  23 #define DEBUG_DEFAULTS 0   /* default debugging bitmask */
  24
  25
  26 #ifdef DEBUGGING_ON
  27 #define DB(f,a) if (hostdata->args & (f)) a;
  28 #else
  29 #define DB(f,a)
  30 #endif
  31
  32 #define uchar unsigned char
  33
  34
  35 /* wd register names */
  36 #define WD_OWN_ID    0x00
  37 #define WD_CONTROL      0x01
  38 #define WD_TIMEOUT_PERIOD  0x02
  39 #define WD_CDB_1     0x03
  40 #define WD_CDB_2     0x04
  41 #define WD_CDB_3     0x05
  42 #define WD_CDB_4     0x06
  43 #define WD_CDB_5     0x07
  44 #define WD_CDB_6     0x08
  45 #define WD_CDB_7     0x09
  46 #define WD_CDB_8     0x0a
  47 #define WD_CDB_9     0x0b
  48 #define WD_CDB_10    0x0c
  49 #define WD_CDB_11    0x0d
  50 #define WD_CDB_12    0x0e
  51 #define WD_TARGET_LUN      0x0f
  52 #define WD_COMMAND_PHASE   0x10
  53 #define WD_SYNCHRONOUS_TRANSFER 0x11
  54 #define WD_TRANSFER_COUNT_MSB 0x12
  55 #define WD_TRANSFER_COUNT  0x13
  56 #define WD_TRANSFER_COUNT_LSB 0x14
  57 #define WD_DESTINATION_ID  0x15
  58 #define WD_SOURCE_ID    0x16
  59 #define WD_SCSI_STATUS     0x17
  60 #define WD_COMMAND      0x18
  61 #define WD_DATA      0x19
  62 #define WD_QUEUE_TAG    0x1a
  63 #define WD_AUXILIARY_STATUS   0x1f
  64
  65 /* WD commands */
  66 #define WD_CMD_RESET    0x00
  67 #define WD_CMD_ABORT    0x01
  68 #define WD_CMD_ASSERT_ATN  0x02
  69 #define WD_CMD_NEGATE_ACK  0x03
  70 #define WD_CMD_DISCONNECT  0x04
  71 #define WD_CMD_RESELECT    0x05
  72 #define WD_CMD_SEL_ATN     0x06
  73 #define WD_CMD_SEL      0x07
  74 #define WD_CMD_SEL_ATN_XFER   0x08
  75 #define WD_CMD_SEL_XFER    0x09
  76 #define WD_CMD_RESEL_RECEIVE  0x0a
  77 #define WD_CMD_RESEL_SEND  0x0b
  78 #define WD_CMD_WAIT_SEL_RECEIVE 0x0c
  79 #define WD_CMD_TRANS_ADDR  0x18
  80 #define WD_CMD_TRANS_INFO  0x20
  81 #define WD_CMD_TRANSFER_PAD   0x21
  82 #define WD_CMD_SBT_MODE    0x80
  83
  84 /* ASR register */
  85 #define ASR_INT         (0x80)
  86 #define ASR_LCI         (0x40)
  87 #define ASR_BSY         (0x20)
  88 #define ASR_CIP         (0x10)
  89 #define ASR_PE          (0x02)
  90 #define ASR_DBR         (0x01)
  91
  92 /* SCSI Bus Phases */
  93 #define PHS_DATA_OUT    0x00
  94 #define PHS_DATA_IN     0x01
  95 #define PHS_COMMAND     0x02
  96 #define PHS_STATUS      0x03
  97 #define PHS_MESS_OUT    0x06
  98 #define PHS_MESS_IN     0x07
  99
 100 /* Command Status Register definitions */
 101
 102   /* reset state interrupts */
 103 #define CSR_RESET    0x00
 104 #define CSR_RESET_AF    0x01
 105
 106   /* successful completion interrupts */
 107 #define CSR_RESELECT    0x10
 108 #define CSR_SELECT      0x11
 109 #define CSR_SEL_XFER_DONE  0x16
 110 #define CSR_XFER_DONE      0x18
 111
 112   /* paused or aborted interrupts */
 113 #define CSR_MSGIN    0x20
 114 #define CSR_SDP         0x21
 115 #define CSR_SEL_ABORT      0x22
 116 #define CSR_RESEL_ABORT    0x25
 117 #define CSR_RESEL_ABORT_AM 0x27
 118 #define CSR_ABORT    0x28
 119
 120   /* terminated interrupts */
 121 #define CSR_INVALID     0x40
 122 #define CSR_UNEXP_DISC     0x41
 123 #define CSR_TIMEOUT     0x42
 124 #define CSR_PARITY      0x43
 125 #define CSR_PARITY_ATN     0x44
 126 #define CSR_BAD_STATUS     0x45
 127 #define CSR_UNEXP    0x48
 128
 129   /* service required interrupts */
 130 #define CSR_RESEL    0x80
 131 #define CSR_RESEL_AM    0x81
 132 #define CSR_DISC     0x85
 133 #define CSR_SRV_REQ     0x88
 134
 135    /* Own ID/CDB Size register */
 136 #define OWNID_EAF    0x08
 137 #define OWNID_EHP    0x10
 138 #define OWNID_RAF    0x20
 139 #define OWNID_FS_8   0x00
 140 #define OWNID_FS_12  0x40
 141 #define OWNID_FS_16  0x80
 142
 143    /* define these so we don't have to change a2091.c, etc. */
 144 #define WD33C93_FS_8_10  OWNID_FS_8
 145 #define WD33C93_FS_12_15 OWNID_FS_12
 146 #define WD33C93_FS_16_20 OWNID_FS_16
 147
 148    /* pass input-clock explicitly. accepted mhz values are 8-10,12-20 */
 149 #define WD33C93_FS_MHZ(mhz) (mhz)
 150
 151    /* Control register */
 152 #define CTRL_HSP     0x01
 153 #define CTRL_HA      0x02
 154 #define CTRL_IDI     0x04
 155 #define CTRL_EDI     0x08
 156 #define CTRL_HHP     0x10
 157 #define CTRL_POLLED  0x00
 158 #define CTRL_BURST   0x20
 159 #define CTRL_BUS     0x40
 160 #define CTRL_DMA     0x80
 161
 162    /* Timeout Period register */
 163 #define TIMEOUT_PERIOD_VALUE  20    /* 20 = 200 ms */
 164
 165    /* Synchronous Transfer Register */
 166 #define STR_FSS      0x80
 167
 168    /* Destination ID register */
 169 #define DSTID_DPD    0x40
 170 #define DATA_OUT_DIR 0
 171 #define DATA_IN_DIR  1
 172 #define DSTID_SCC    0x80
 173
 174    /* Source ID register */
 175 #define SRCID_MASK   0x07
 176 #define SRCID_SIV    0x08
 177 #define SRCID_DSP    0x20
 178 #define SRCID_ES     0x40
 179 #define SRCID_ER     0x80
 180
 181    /* This is what the 3393 chip looks like to us */
 182 typedef struct {
 183    volatile unsigned char  *SASR;
 184    volatile unsigned char  *SCMD;
 185 } wd33c93_regs;
 186
 187
 188 typedef int (*dma_setup_t) (struct scsi_cmnd *SCpnt, int dir_in);
 189 typedef void (*dma_stop_t) (struct Scsi_Host *instance,
 190                 struct scsi_cmnd *SCpnt, int status);
 191
 192
 193 #define ILLEGAL_STATUS_BYTE   0xff
 194
 195 #define DEFAULT_SX_PER   376     /* (ns) fairly safe */
 196 #define DEFAULT_SX_OFF   0       /* aka async */
 197
 198 #define OPTIMUM_SX_PER   252     /* (ns) best we can do (mult-of-4) */
 199 #define OPTIMUM_SX_OFF   12      /* size of wd3393 fifo */
 200
 201 struct sx_period {
 202    unsigned int   period_ns;
 203    uchar          reg_value;
 204    };
 205
 206 /* FEF: defines for hostdata->dma_buffer_pool */
 207
 208 #define BUF_CHIP_ALLOCED 0
 209 #define BUF_SCSI_ALLOCED 1
 210
 211 struct WD33C93_hostdata {
 212     struct Scsi_Host *next;
 213     wd33c93_regs     regs;
 214     spinlock_t       lock;
 215     uchar            clock_freq;
 216     uchar            chip;             /* what kind of wd33c93? */
 217     uchar            microcode;        /* microcode rev */
 218     uchar            dma_buffer_pool;  /* FEF: buffer from chip_ram? */
 219     int              dma_dir;          /* data transfer dir. */
 220     dma_setup_t      dma_setup;
 221     dma_stop_t       dma_stop;
 222     unsigned int     dma_xfer_mask;
 223     uchar            *dma_bounce_buffer;
 224     unsigned int     dma_bounce_len;
 225     volatile uchar   busy[8];          /* index = target, bit = lun */
 226     volatile struct scsi_cmnd *input_Q;       /* commands waiting to be started */
 227     volatile struct scsi_cmnd *selecting;     /* trying to select this command */
 228     volatile struct scsi_cmnd *connected;     /* currently connected command */
 229     volatile struct scsi_cmnd *disconnected_Q;/* commands waiting for reconnect */
 230     uchar            state;            /* what we are currently doing */
 231     uchar            dma;              /* current state of DMA (on/off) */
 232     uchar            level2;           /* extent to which Level-2 commands are used */
 233     uchar            disconnect;       /* disconnect/reselect policy */
 234     unsigned int     args;             /* set from command-line argument */
 235     uchar            incoming_msg[8];  /* filled during message_in phase */
 236     int              incoming_ptr;     /* mainly used with EXTENDED messages */
 237     uchar            outgoing_msg[8];  /* send this during next message_out */
 238     int              outgoing_len;     /* length of outgoing message */
 239     unsigned int     default_sx_per;   /* default transfer period for SCSI bus */
 240     uchar            sync_xfer[8];     /* sync_xfer reg settings per target */
 241     uchar            sync_stat[8];     /* status of sync negotiation per target */
 242     uchar            no_sync;          /* bitmask: don't do sync on these targets */
 243     uchar            no_dma;           /* set this flag to disable DMA */
 244     uchar            dma_mode;         /* DMA Burst Mode or Single Byte DMA */
 245     uchar            fast;             /* set this flag to enable Fast SCSI */
 246     struct sx_period sx_table[9];      /* transfer periods for actual DTC-setting */
 247 #ifdef PROC_INTERFACE
 248     uchar            proc;             /* bitmask: what's in proc output */
 249 #ifdef PROC_STATISTICS
 250     unsigned long    cmd_cnt[8];       /* # of commands issued per target */
 251     unsigned long    int_cnt;          /* # of interrupts serviced */
 252     unsigned long    pio_cnt;          /* # of pio data transfers */
 253     unsigned long    dma_cnt;          /* # of DMA data transfers */
 254     unsigned long    disc_allowed_cnt[8]; /* # of disconnects allowed per target */
 255     unsigned long    disc_done_cnt[8]; /* # of disconnects done per target*/
 256 #endif
 257 #endif
 258     };
 259
 260 static inline struct scsi_pointer *WD33C93_scsi_pointer(struct scsi_cmnd *cmd)
 261 {
 262         return scsi_cmd_priv(cmd);
 263 }
 264
 265 /* defines for hostdata->chip */
 266
 267 #define C_WD33C93       0
 268 #define C_WD33C93A      1
 269 #define C_WD33C93B      2
 270 #define C_UNKNOWN_CHIP  100
 271
 272 /* defines for hostdata->state */
 273
 274 #define S_UNCONNECTED         0
 275 #define S_SELECTING           1
 276 #define S_RUNNING_LEVEL2      2
 277 #define S_CONNECTED           3
 278 #define S_PRE_TMP_DISC        4
 279 #define S_PRE_CMP_DISC        5
 280
 281 /* defines for hostdata->dma */
 282
 283 #define D_DMA_OFF          0
 284 #define D_DMA_RUNNING      1
 285
 286 /* defines for hostdata->level2 */
 287 /* NOTE: only the first 3 are implemented so far */
 288
 289 #define L2_NONE      1  /* no combination commands - we get lots of ints */
 290 #define L2_SELECT    2  /* start with SEL_ATN_XFER, but never resume it */
 291 #define L2_BASIC     3  /* resume after STATUS ints & RDP messages */
 292 #define L2_DATA      4  /* resume after DATA_IN/OUT ints */
 293 #define L2_MOST      5  /* resume after anything except a RESELECT int */
 294 #define L2_RESELECT  6  /* resume after everything, including RESELECT ints */
 295 #define L2_ALL       7  /* always resume */
 296
 297 /* defines for hostdata->disconnect */
 298
 299 #define DIS_NEVER    0
 300 #define DIS_ADAPTIVE 1
 301 #define DIS_ALWAYS   2
 302
 303 /* defines for hostdata->args */
 304
 305 #define DB_TEST1              1<<0
 306 #define DB_TEST2              1<<1
 307 #define DB_QUEUE_COMMAND      1<<2
 308 #define DB_EXECUTE            1<<3
 309 #define DB_INTR               1<<4
 310 #define DB_TRANSFER           1<<5
 311 #define DB_MASK               0x3f
 312
 313 /* defines for hostdata->sync_stat[] */
 314
 315 #define SS_UNSET     0
 316 #define SS_FIRST     1
 317 #define SS_WAITING   2
 318 #define SS_SET       3
 319
 320 /* defines for hostdata->proc */
 321
 322 #define PR_VERSION   1<<0
 323 #define PR_INFO      1<<1
 324 #define PR_STATISTICS 1<<2
 325 #define PR_CONNECTED 1<<3
 326 #define PR_INPUTQ    1<<4
 327 #define PR_DISCQ     1<<5
 328 #define PR_TEST      1<<6
 329 #define PR_STOP      1<<7
 330
 331
 332 void wd33c93_init (struct Scsi_Host *instance, const wd33c93_regs regs,
 333          dma_setup_t setup, dma_stop_t stop, int clock_freq);
 334 int wd33c93_abort (struct scsi_cmnd *cmd);
 335 int wd33c93_queuecommand (struct Scsi_Host *h, struct scsi_cmnd *cmd);
 336 void wd33c93_intr (struct Scsi_Host *instance);
 337 int wd33c93_show_info(struct seq_file *, struct Scsi_Host *);
 338 int wd33c93_write_info(struct Scsi_Host *, char *, int);
 339 int wd33c93_host_reset (struct scsi_cmnd *);
 340
 341 #endif /* WD33C93_H */