drivers/scsi/in2000.h

   1 /*
   2  *    in2000.h -  Linux device driver definitions for the
   3  *                Always IN2000 ISA SCSI card.
   4  *
   5  *    IMPORTANT: This file is for version 1.33 - 26/Aug/1998
   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
  23 #ifndef IN2000_H
  24 #define IN2000_H
  25
  26 #include <asm/io.h>
  27
  28 #define PROC_INTERFACE     /* add code for /proc/scsi/in2000/xxx interface */
  29 #ifdef  PROC_INTERFACE
  30 #define PROC_STATISTICS    /* add code for keeping various real time stats */
  31 #endif
  32
  33 #define SYNC_DEBUG         /* extra info on sync negotiation printed */
  34 #define DEBUGGING_ON       /* enable command-line debugging bitmask */
  35 #define DEBUG_DEFAULTS 0   /* default bitmask - change from command-line */
  36
  37 #ifdef __i386__
  38 #define FAST_READ_IO       /* No problems with these on my machine */
  39 #define FAST_WRITE_IO
  40 #endif
  41
  42 #ifdef DEBUGGING_ON
  43 #define DB(f,a) if (hostdata->args & (f)) a;
  44 #define CHECK_NULL(p,s) /* if (!(p)) {printk("\n"); while (1) printk("NP:%s\r",(s));} */
  45 #else
  46 #define DB(f,a)
  47 #define CHECK_NULL(p,s)
  48 #endif
  49
  50 #define uchar unsigned char
  51
  52 #define read1_io(a)     (inb(hostdata->io_base+(a)))
  53 #define read2_io(a)     (inw(hostdata->io_base+(a)))
  54 #define write1_io(b,a)  (outb((b),hostdata->io_base+(a)))
  55 #define write2_io(w,a)  (outw((w),hostdata->io_base+(a)))
  56
  57 #ifdef __i386__
  58 /* These inline assembly defines are derived from a patch
  59  * sent to me by Bill Earnest. He's done a lot of very
  60  * valuable thinking, testing, and coding during his effort
  61  * to squeeze more speed out of this driver. I really think
  62  * that we are doing IO at close to the maximum now with
  63  * the fifo. (And yes, insw uses 'edi' while outsw uses
  64  * 'esi'. Thanks Bill!)
  65  */
  66
  67 #define FAST_READ2_IO()    \
  68 ({ \
  69 int __dummy_1,__dummy_2; \
  70    __asm__ __volatile__ ("\n \
  71    cld                    \n \
  72    orl %%ecx, %%ecx       \n \
  73    jz 1f                  \n \
  74    rep                    \n \
  75    insw (%%dx),%%es:(%%edi) \n \
  76 1: "                       \
  77    : "=D" (sp) ,"=c" (__dummy_1) ,"=d" (__dummy_2)  /* output */   \
  78    : "2" (f), "0" (sp), "1" (i)  /* input */    \
  79    );       /* trashed */ \
  80 })
  81
  82 #define FAST_WRITE2_IO()   \
  83 ({ \
  84 int __dummy_1,__dummy_2; \
  85    __asm__ __volatile__ ("\n \
  86    cld                    \n \
  87    orl %%ecx, %%ecx       \n \
  88    jz 1f                  \n \
  89    rep                    \n \
  90    outsw %%ds:(%%esi),(%%dx) \n \
  91 1: "                       \
  92    : "=S" (sp) ,"=c" (__dummy_1) ,"=d" (__dummy_2)/* output */   \
  93    : "2" (f), "0" (sp), "1" (i)  /* input */    \
  94    );       /* trashed */ \
  95 })
  96 #endif
  97
  98 /* IN2000 io_port offsets */
  99 #define IO_WD_ASR       0x00     /* R - 3393 auxstat reg */
 100 #define     ASR_INT        0x80
 101 #define     ASR_LCI        0x40
 102 #define     ASR_BSY        0x20
 103 #define     ASR_CIP        0x10
 104 #define     ASR_PE         0x02
 105 #define     ASR_DBR        0x01
 106 #define IO_WD_ADDR      0x00     /* W - 3393 address reg */
 107 #define IO_WD_DATA      0x01     /* R/W - rest of 3393 regs */
 108 #define IO_FIFO         0x02     /* R/W - in2000 dual-port fifo (16 bits) */
 109 #define IN2000_FIFO_SIZE   2048  /*    fifo capacity in bytes */
 110 #define IO_CARD_RESET   0x03     /* W - in2000 start master reset */
 111 #define IO_FIFO_COUNT   0x04     /* R - in2000 fifo counter */
 112 #define IO_FIFO_WRITE   0x05     /* W - clear fifo counter, start write */
 113 #define IO_FIFO_READ    0x07     /* W - start fifo read */
 114 #define IO_LED_OFF      0x08     /* W - turn off in2000 activity LED */
 115 #define IO_SWITCHES     0x08     /* R - read in2000 dip switch */
 116 #define     SW_ADDR0       0x01  /*    bit 0 = bit 0 of index to io addr */
 117 #define     SW_ADDR1       0x02  /*    bit 1 = bit 1 of index io addr */
 118 #define     SW_DISINT      0x04  /*    bit 2 true if ints disabled */
 119 #define     SW_INT0        0x08  /*    bit 3 = bit 0 of index to interrupt */
 120 #define     SW_INT1        0x10  /*    bit 4 = bit 1 of index to interrupt */
 121 #define     SW_INT_SHIFT   3     /*    shift right this amount to right justify int bits */
 122 #define     SW_SYNC_DOS5   0x20  /*    bit 5 used by Always BIOS */
 123 #define     SW_FLOPPY      0x40  /*    bit 6 true if floppy enabled */
 124 #define     SW_BIT7        0x80  /*    bit 7 hardwired true (ground) */
 125 #define IO_LED_ON       0x09     /* W - turn on in2000 activity LED */
 126 #define IO_HARDWARE     0x0a     /* R - read in2000 hardware rev, stop reset */
 127 #define IO_INTR_MASK    0x0c     /* W - in2000 interrupt mask reg */
 128 #define     IMASK_WD       0x01  /*    WD33c93 interrupt mask */
 129 #define     IMASK_FIFO     0x02  /*    FIFO interrupt mask */
 130
 131 /* wd register names */
 132 #define WD_OWN_ID    0x00
 133 #define WD_CONTROL   0x01
 134 #define WD_TIMEOUT_PERIOD  0x02
 135 #define WD_CDB_1     0x03
 136 #define WD_CDB_2     0x04
 137 #define WD_CDB_3     0x05
 138 #define WD_CDB_4     0x06
 139 #define WD_CDB_5     0x07
 140 #define WD_CDB_6     0x08
 141 #define WD_CDB_7     0x09
 142 #define WD_CDB_8     0x0a
 143 #define WD_CDB_9     0x0b
 144 #define WD_CDB_10    0x0c
 145 #define WD_CDB_11    0x0d
 146 #define WD_CDB_12    0x0e
 147 #define WD_TARGET_LUN      0x0f
 148 #define WD_COMMAND_PHASE   0x10
 149 #define WD_SYNCHRONOUS_TRANSFER  0x11
 150 #define WD_TRANSFER_COUNT_MSB 0x12
 151 #define WD_TRANSFER_COUNT  0x13
 152 #define WD_TRANSFER_COUNT_LSB 0x14
 153 #define WD_DESTINATION_ID  0x15
 154 #define WD_SOURCE_ID    0x16
 155 #define WD_SCSI_STATUS     0x17
 156 #define WD_COMMAND      0x18
 157 #define WD_DATA      0x19
 158 #define WD_QUEUE_TAG    0x1a
 159 #define WD_AUXILIARY_STATUS   0x1f
 160
 161 /* WD commands */
 162 #define WD_CMD_RESET    0x00
 163 #define WD_CMD_ABORT    0x01
 164 #define WD_CMD_ASSERT_ATN  0x02
 165 #define WD_CMD_NEGATE_ACK  0x03
 166 #define WD_CMD_DISCONNECT  0x04
 167 #define WD_CMD_RESELECT    0x05
 168 #define WD_CMD_SEL_ATN     0x06
 169 #define WD_CMD_SEL      0x07
 170 #define WD_CMD_SEL_ATN_XFER   0x08
 171 #define WD_CMD_SEL_XFER    0x09
 172 #define WD_CMD_RESEL_RECEIVE  0x0a
 173 #define WD_CMD_RESEL_SEND  0x0b
 174 #define WD_CMD_WAIT_SEL_RECEIVE 0x0c
 175 #define WD_CMD_TRANS_ADDR  0x18
 176 #define WD_CMD_TRANS_INFO  0x20
 177 #define WD_CMD_TRANSFER_PAD   0x21
 178 #define WD_CMD_SBT_MODE    0x80
 179
 180 /* SCSI Bus Phases */
 181 #define PHS_DATA_OUT    0x00
 182 #define PHS_DATA_IN     0x01
 183 #define PHS_COMMAND     0x02
 184 #define PHS_STATUS      0x03
 185 #define PHS_MESS_OUT    0x06
 186 #define PHS_MESS_IN     0x07
 187
 188 /* Command Status Register definitions */
 189
 190   /* reset state interrupts */
 191 #define CSR_RESET    0x00
 192 #define CSR_RESET_AF    0x01
 193
 194   /* successful completion interrupts */
 195 #define CSR_RESELECT    0x10
 196 #define CSR_SELECT      0x11
 197 #define CSR_SEL_XFER_DONE  0x16
 198 #define CSR_XFER_DONE      0x18
 199
 200   /* paused or aborted interrupts */
 201 #define CSR_MSGIN    0x20
 202 #define CSR_SDP         0x21
 203 #define CSR_SEL_ABORT      0x22
 204 #define CSR_RESEL_ABORT    0x25
 205 #define CSR_RESEL_ABORT_AM 0x27
 206 #define CSR_ABORT    0x28
 207
 208   /* terminated interrupts */
 209 #define CSR_INVALID     0x40
 210 #define CSR_UNEXP_DISC     0x41
 211 #define CSR_TIMEOUT     0x42
 212 #define CSR_PARITY      0x43
 213 #define CSR_PARITY_ATN     0x44
 214 #define CSR_BAD_STATUS     0x45
 215 #define CSR_UNEXP    0x48
 216
 217   /* service required interrupts */
 218 #define CSR_RESEL    0x80
 219 #define CSR_RESEL_AM    0x81
 220 #define CSR_DISC     0x85
 221 #define CSR_SRV_REQ     0x88
 222
 223    /* Own ID/CDB Size register */
 224 #define OWNID_EAF    0x08
 225 #define OWNID_EHP    0x10
 226 #define OWNID_RAF    0x20
 227 #define OWNID_FS_8   0x00
 228 #define OWNID_FS_12  0x40
 229 #define OWNID_FS_16  0x80
 230
 231    /* Control register */
 232 #define CTRL_HSP     0x01
 233 #define CTRL_HA      0x02
 234 #define CTRL_IDI     0x04
 235 #define CTRL_EDI     0x08
 236 #define CTRL_HHP     0x10
 237 #define CTRL_POLLED  0x00
 238 #define CTRL_BURST   0x20
 239 #define CTRL_BUS     0x40
 240 #define CTRL_DMA     0x80
 241
 242    /* Timeout Period register */
 243 #define TIMEOUT_PERIOD_VALUE  20    /* results in 200 ms. */
 244
 245    /* Synchronous Transfer Register */
 246 #define STR_FSS      0x80
 247
 248    /* Destination ID register */
 249 #define DSTID_DPD    0x40
 250 #define DATA_OUT_DIR 0
 251 #define DATA_IN_DIR  1
 252 #define DSTID_SCC    0x80
 253
 254    /* Source ID register */
 255 #define SRCID_MASK   0x07
 256 #define SRCID_SIV    0x08
 257 #define SRCID_DSP    0x20
 258 #define SRCID_ES     0x40
 259 #define SRCID_ER     0x80
 260
 261
 262
 263 #define ILLEGAL_STATUS_BYTE   0xff
 264
 265
 266 #define DEFAULT_SX_PER     500   /* (ns) fairly safe */
 267 #define DEFAULT_SX_OFF     0     /* aka async */
 268
 269 #define OPTIMUM_SX_PER     252   /* (ns) best we can do (mult-of-4) */
 270 #define OPTIMUM_SX_OFF     12    /* size of in2000 fifo */
 271
 272 struct sx_period {
 273    unsigned int   period_ns;
 274    uchar          reg_value;
 275    };
 276
 277
 278 struct IN2000_hostdata {
 279     struct Scsi_Host *next;
 280     uchar            chip;             /* what kind of wd33c93 chip? */
 281     uchar            microcode;        /* microcode rev if 'B' */
 282     unsigned short   io_base;          /* IO port base */
 283     unsigned int     dip_switch;       /* dip switch settings */
 284     unsigned int     hrev;             /* hardware revision of card */
 285     volatile uchar   busy[8];          /* index = target, bit = lun */
 286     volatile Scsi_Cmnd *input_Q;       /* commands waiting to be started */
 287     volatile Scsi_Cmnd *selecting;     /* trying to select this command */
 288     volatile Scsi_Cmnd *connected;     /* currently connected command */
 289     volatile Scsi_Cmnd *disconnected_Q;/* commands waiting for reconnect */
 290     uchar            state;            /* what we are currently doing */
 291     uchar            fifo;             /* what the FIFO is up to */
 292     uchar            level2;           /* extent to which Level-2 commands are used */
 293     uchar            disconnect;       /* disconnect/reselect policy */
 294     unsigned int     args;             /* set from command-line argument */
 295     uchar            incoming_msg[8];  /* filled during message_in phase */
 296     int              incoming_ptr;     /* mainly used with EXTENDED messages */
 297     uchar            outgoing_msg[8];  /* send this during next message_out */
 298     int              outgoing_len;     /* length of outgoing message */
 299     unsigned int     default_sx_per;   /* default transfer period for SCSI bus */
 300     uchar            sync_xfer[8];     /* sync_xfer reg settings per target */
 301     uchar            sync_stat[8];     /* status of sync negotiation per target */
 302     uchar            sync_off;         /* bit mask: don't use sync with these targets */
 303 #ifdef PROC_INTERFACE
 304     uchar            proc;             /* bit mask: what's in proc output */
 305 #ifdef PROC_STATISTICS
 306     unsigned long    cmd_cnt[8];       /* # of commands issued per target */
 307     unsigned long    int_cnt;          /* # of interrupts serviced */
 308     unsigned long    disc_allowed_cnt[8]; /* # of disconnects allowed per target */
 309     unsigned long    disc_done_cnt[8]; /* # of disconnects done per target*/
 310 #endif
 311 #endif
 312     };
 313
 314
 315 /* defines for hostdata->chip */
 316
 317 #define C_WD33C93       0
 318 #define C_WD33C93A      1
 319 #define C_WD33C93B      2
 320 #define C_UNKNOWN_CHIP  100
 321
 322 /* defines for hostdata->state */
 323
 324 #define S_UNCONNECTED         0
 325 #define S_SELECTING           1
 326 #define S_RUNNING_LEVEL2      2
 327 #define S_CONNECTED           3
 328 #define S_PRE_TMP_DISC        4
 329 #define S_PRE_CMP_DISC        5
 330
 331 /* defines for hostdata->fifo */
 332
 333 #define FI_FIFO_UNUSED        0
 334 #define FI_FIFO_READING       1
 335 #define FI_FIFO_WRITING       2
 336
 337 /* defines for hostdata->level2 */
 338 /* NOTE: only the first 3 are trustworthy at this point -
 339  * having trouble when more than 1 device is reading/writing
 340  * at the same time...
 341  */
 342
 343 #define L2_NONE      0  /* no combination commands - we get lots of ints */
 344 #define L2_SELECT    1  /* start with SEL_ATN_XFER, but never resume it */
 345 #define L2_BASIC     2  /* resume after STATUS ints & RDP messages */
 346 #define L2_DATA      3  /* resume after DATA_IN/OUT ints */
 347 #define L2_MOST      4  /* resume after anything except a RESELECT int */
 348 #define L2_RESELECT  5  /* resume after everything, including RESELECT ints */
 349 #define L2_ALL       6  /* always resume */
 350
 351 /* defines for hostdata->disconnect */
 352
 353 #define DIS_NEVER    0
 354 #define DIS_ADAPTIVE 1
 355 #define DIS_ALWAYS   2
 356
 357 /* defines for hostdata->args */
 358
 359 #define DB_TEST               1<<0
 360 #define DB_FIFO               1<<1
 361 #define DB_QUEUE_COMMAND      1<<2
 362 #define DB_EXECUTE            1<<3
 363 #define DB_INTR               1<<4
 364 #define DB_TRANSFER           1<<5
 365 #define DB_MASK               0x3f
 366
 367 #define A_NO_SCSI_RESET       1<<15
 368
 369
 370 /* defines for hostdata->sync_xfer[] */
 371
 372 #define SS_UNSET     0
 373 #define SS_FIRST     1
 374 #define SS_WAITING   2
 375 #define SS_SET       3
 376
 377 /* defines for hostdata->proc */
 378
 379 #define PR_VERSION   1<<0
 380 #define PR_INFO      1<<1
 381 #define PR_STATISTICS 1<<2
 382 #define PR_CONNECTED 1<<3
 383 #define PR_INPUTQ    1<<4
 384 #define PR_DISCQ     1<<5
 385 #define PR_TEST      1<<6
 386 #define PR_STOP      1<<7
 387
 388
 389 # include <linux/init.h>
 390 # include <linux/spinlock.h>
 391 # define in2000__INITFUNC(function) __initfunc(function)
 392 # define in2000__INIT __init
 393 # define in2000__INITDATA __initdata
 394 # define CLISPIN_LOCK(host,flags)   spin_lock_irqsave(host->host_lock, flags)
 395 # define CLISPIN_UNLOCK(host,flags) spin_unlock_irqrestore(host->host_lock, \
 396                                                            flags)
 397
 398 static int in2000_detect(Scsi_Host_Template *) in2000__INIT;
 399 static int in2000_queuecommand(Scsi_Cmnd *, void (*done)(Scsi_Cmnd *));
 400 static int in2000_abort(Scsi_Cmnd *);
 401 static void in2000_setup(char *, int *) in2000__INIT;
 402 static int in2000_biosparam(struct scsi_device *, struct block_device *,
 403                 sector_t, int *);
 404 static int in2000_host_reset(Scsi_Cmnd *);
 405 static int in2000_bus_reset(Scsi_Cmnd *);
 406 static int in2000_device_reset(Scsi_Cmnd *);
 407
 408
 409 #define IN2000_CAN_Q    16
 410 #define IN2000_SG       SG_ALL
 411 #define IN2000_CPL      2
 412 #define IN2000_HOST_ID  7
 413
 414 #endif /* IN2000_H */