drivers/scsi/wd33c93.c

/* */
This source file includes following definitions.
read_wd33c93
write_wd33c93
write_wd33c93_cmd
read_1_byte
write_wd33c93_count
read_wd33c93_count
round_period
calc_sync_xfer
wd33c93_queuecommand
wd33c93_execute
transfer_pio
transfer_bytes
wd33c93_intr
reset_wd33c93
wd33c93_reset
wd33c93_abort
wd33c93_setup
check_setup_strings
wd33c93_init
wd33c93_proc_info
   1 /*
   2  *    wd33c93.c - Linux-68k device driver for the Commodore
   3  *                Amiga A2091/590 SCSI controller card
   4  *
   5  * Copyright (c) 1996 John Shifflett, GeoLog Consulting
   6  *    john@geolog.com
   7  *    jshiffle@netcom.com
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2, or (at your option)
  12  * any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  *
  20  * Drew Eckhardt's excellent 'Generic NCR5380' sources from Linux-PC
  21  * provided much of the inspiration and some of the code for this
  22  * driver. Everything I know about Amiga DMA was gleaned from careful
  23  * reading of Hamish Mcdonald's original wd33c93 driver; in fact, I
  24  * borrowed shamelessly from all over that source. Thanks Hamish!
  25  *
  26  * _This_ driver is (I feel) an improvement over the old one in
  27  * several respects:
  28  *
  29  *    -  Target Disconnection/Reconnection  is now supported. Any
  30  *          system with more than one device active on the SCSI bus
  31  *          will benefit from this. The driver defaults to what I'm
  32  *          'adaptive disconnect' - meaning that each command is
  33  *          evaluated individually as to whether or not it should
  34  *          be run with the option to disconnect/reslect (if the
  35  *          device chooses), or as a "SCSI-bus-hog".
  36  *
  37  *    -  Synchronous data transfers are now supported. Because of
  38  *          a few devices that choke after telling the driver that
  39  *          they can do sync transfers, we don't automatically use
  40  *          this faster protocol - it can be enabled via the command-
  41  *          line on a device-by-device basis.
  42  *
  43  *    -  Runtime operating parameters can now be specified through
  44  *       the 'amiboot' or the 'insmod' command line. For amiboot do:
  45  *          "amiboot [usual stuff] wd33c93=blah,blah,blah"
  46  *       The defaults should be good for most people. See the comment
  47  *       for 'setup_strings' below for more details.
  48  *
  49  *    -  The old driver relied exclusively on what the Western Digital
  50  *          docs call "Combination Level 2 Commands", which are a great
  51  *          idea in that the CPU is relieved of a lot of interrupt
  52  *          overhead. However, by accepting a certain (user-settable)
  53  *          amount of additional interrupts, this driver achieves
  54  *          better control over the SCSI bus, and data transfers are
  55  *          almost as fast while being much easier to define, track,
  56  *          and debug.
  57  *
  58  *
  59  * TODO:
  60  *       more speed. linked commands.
  61  *
  62  *
  63  * People with bug reports, wish-lists, complaints, comments,
  64  * or improvements are asked to pah-leeez email me (John Shifflett)
  65  * at john@geolog.com or jshiffle@netcom.com! I'm anxious to get
  66  * this thing into as good a shape as possible, and I'm positive
  67  * there are lots of lurking bugs and "Stupid Places".
  68  *
  69  */
  70 
  71 #include <asm/system.h>
  72 #include <linux/sched.h>
  73 #include <linux/string.h>
  74 #include <linux/delay.h>
  75 #include <linux/version.h>
  76 
  77 #if LINUX_VERSION_CODE >= 0x010300
  78 #include <linux/blk.h>
  79 #else
  80 #include "../block/blk.h"
  81 #endif
  82 
  83 #include "scsi.h"
  84 #include "hosts.h"
  85 #include "wd33c93.h"
  86 
  87 #ifdef MODULE
  88 #include <linux/module.h>
  89 #endif
  90 
  91 /* Leave this undefined for now - need to make some changes in the
  92  * a3000/a2019/gvp11 files to get it working right
  93  */
  94 /*#define PROC_INTERFACE*/     /* add code for /proc/scsi/wd33c93/xxx interface */
  95 
  96 #define SYNC_DEBUG         /* extra info on sync negotiation printed */
  97 #define DEBUGGING_ON       /* enable command-line debugging bitmask */
  98 #define DEBUG_DEFAULTS 0   /* default debugging bitmask */
  99 
 100 #define WD33C93_VERSION    "1.21"
 101 #define WD33C93_DATE       "20/Apr/1996"
 102 
 103 #ifdef DEBUGGING_ON
 104 #define DB(f,a) if (hostdata->args & (f)) a;
 105 #else
 106 #define DB(f,a)
 107 #endif
 108 
 109 #define IS_DIR_OUT(cmd) ((cmd)->cmnd[0] == WRITE_6  || \
 110                          (cmd)->cmnd[0] == WRITE_10 || \
 111                          (cmd)->cmnd[0] == WRITE_12)
 112 
 113 
 114 /*
 115  * setup_strings is an array of strings that define some of the operating
 116  * parameters and settings for this driver. It is used unless an amiboot
 117  * or insmod command line has been specified, in which case those settings
 118  * are combined with the ones here. The driver recognizes the following
 119  * keywords (lower case required) and arguments:
 120  *
 121  * -  nosync:bitmask -bitmask is a byte where the 1st 7 bits correspond with
 122  *                    the 7 possible SCSI devices. Set a bit to prevent sync
 123  *                    negotiation on that device. To maintain backwards
 124  *                    compatability, a command-line such as "wd33c93=255" will
 125  *                    be automatically translated to "wd33c93=nosync:0xff".
 126  * -  period:ns      -ns is the minimum # of nanoseconds in a SCSI data transfer
 127  *                    period. Default is 500; acceptable values are 250 - 1000.
 128  * -  disconnect:x   -x = 0 to never allow disconnects, 2 to always allow them.
 129  *                    x = 1 does 'adaptive' disconnects, which is the default
 130  *                    and generally the best choice.
 131  * -  debug:x        -If 'DEBUGGING_ON' is defined, x is a bit mask that causes
 132  *                    various types of debug output to printed - see the DB_xxx
 133  *                    defines in wd33c93.h
 134  * -  clock:x        -x = clock input in MHz for WD33c93 chip. Normal values
 135  *                    would be from 8 through 20. Default is 8.
 136  * -  next           -No argument. Used to separate blocks of keywords when
 137  *                    there's more than one host adapter in the system.
 138  *
 139  * Syntax Notes:
 140  * -  Numeric arguments can be decimal or the '0x' form of hex notation. There
 141  *    _must_ be a colon between a keyword and its numeric argument, with no
 142  *    spaces.
 143  * -  Keywords are separated by commas, no spaces, in the standard kernel
 144  *    command-line manner, except in the case of 'setup_strings[]' (see
 145  *    below), which is simply a C array of pointers to char. Each element
 146  *    in the array is a string comprising one keyword & argument.
 147  * -  A keyword in the 'nth' comma-separated command-line member will overwrite
 148  *    the 'nth' element of setup_strings[]. A blank command-line member (in
 149  *    other words, a comma with no preceding keyword) will _not_ overwrite
 150  *    the corresponding setup_strings[] element.
 151  * -  If a keyword is used more than once, the first one applies to the first
 152  *    SCSI host found, the second to the second card, etc, unless the 'next'
 153  *    keyword is used to change the order.
 154  *
 155  * Some amiboot examples (for insmod, use 'setup_strings' instead of 'wd33c93'):
 156  * -  wd33c93=nosync:255
 157  * -  wd33c93=disconnect:2,nosync:0x08,period:250
 158  * -  wd33c93=debug:0x1c
 159  */
 160 
 161 static char *setup_strings[] =
 162       {"","","","","","","","","","","",""};
 163 
 164 #ifdef PROC_INTERFACE
 165 unsigned long disc_allowed_total;
 166 unsigned long disc_taken_total;
 167 #endif
 168 
 169 
 170 inline uchar read_wd33c93(wd33c93_regs *regp,uchar reg_num)
     /*  */
 171 {
 172    regp->SASR = reg_num;
 173    return(regp->SCMD);
 174 }
 175 
 176 
 177 #define READ_AUX_STAT() (regp->SASR)
 178 
 179 
 180 inline void write_wd33c93(wd33c93_regs *regp,uchar reg_num, uchar value)
     /*  */
 181 {
 182    regp->SASR = reg_num;
 183    regp->SCMD = value;
 184 }
 185 
 186 
 187 inline void write_wd33c93_cmd(wd33c93_regs *regp, uchar cmd)
     /*  */
 188 {
 189    regp->SASR = WD_COMMAND;
 190    regp->SCMD = cmd;
 191 }
 192 
 193 
 194 inline uchar read_1_byte(wd33c93_regs *regp)
     /*  */
 195 {
 196 uchar asr;
 197 uchar x = 0;
 198 
 199    write_wd33c93(regp, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED);
 200    write_wd33c93_cmd(regp, WD_CMD_TRANS_INFO|0x80);
 201    do {
 202       asr = READ_AUX_STAT();
 203       if (asr & ASR_DBR)
 204          x = read_wd33c93(regp, WD_DATA);
 205       } while (!(asr & ASR_INT));
 206    return x;
 207 }
 208 
 209 
 210 void write_wd33c93_count(wd33c93_regs *regp,unsigned long value)
     /*  */
 211 {
 212    regp->SASR = WD_TRANSFER_COUNT_MSB;
 213    regp->SCMD = value >> 16;
 214    regp->SCMD = value >> 8;
 215    regp->SCMD = value;
 216 }
 217 
 218 
 219 unsigned long read_wd33c93_count(wd33c93_regs *regp)
     /*  */
 220 {
 221 unsigned long value;
 222 
 223    regp->SASR = WD_TRANSFER_COUNT_MSB;
 224    value = regp->SCMD << 16;
 225    value |= regp->SCMD << 8;
 226    value |= regp->SCMD;
 227    return value;
 228 }
 229 
 230 
 231 
 232 static struct sx_period sx_table[] = {
 233    {  1, 0x20},
 234    {252, 0x20},
 235    {376, 0x30},
 236    {500, 0x40},
 237    {624, 0x50},
 238    {752, 0x60},
 239    {876, 0x70},
 240    {1000,0x00},
 241    {0,   0} };
 242 
 243 int round_period(unsigned int period)
     /*  */
 244 {
 245 int x;
 246 
 247    for (x=1; sx_table[x].period_ns; x++) {
 248       if ((period <= sx_table[x-0].period_ns) &&
 249           (period >  sx_table[x-1].period_ns)) {
 250          return x;
 251          }
 252       }
 253    return 7;
 254 }
 255 
 256 uchar calc_sync_xfer(unsigned int period, unsigned int offset)
     /*  */
 257 {
 258 uchar result;
 259 
 260    period *= 4;   /* convert SDTR code to ns */
 261    result = sx_table[round_period(period)].reg_value;
 262    result |= (offset < OPTIMUM_SX_OFF)?offset:OPTIMUM_SX_OFF;
 263    return result;
 264 }
 265 
 266 
 267 
 268 void wd33c93_execute(struct Scsi_Host *instance);
 269 
 270 int wd33c93_queuecommand (Scsi_Cmnd *cmd, void (*done)(Scsi_Cmnd *))
     /*  */
 271 {
 272 struct WD33C93_hostdata *hostdata;
 273 Scsi_Cmnd *tmp;
 274 unsigned long flags;
 275 
 276 
 277    save_flags(flags);
 278    cli();
 279    hostdata = (struct WD33C93_hostdata *)cmd->host->hostdata;
 280 
 281 DB(DB_QUEUE_COMMAND,printk("Q-%d-%02x-%ld( ",cmd->target,cmd->cmnd[0],cmd->pid))
 282 
 283 /* Set up a few fields in the Scsi_Cmnd structure for our own use:
 284  *  - host_scribble is the pointer to the next cmd in the input queue
 285  *  - scsi_done points to the routine we call when a cmd is finished
 286  *  - result is what you'd expect
 287  */
 288 
 289    cmd->host_scribble = NULL;
 290    cmd->scsi_done = done;
 291    cmd->result = 0;
 292 
 293 /* We use the Scsi_Pointer structure that's included with each command
 294  * as a scratchpad (as it's intended to be used!). The handy thing about
 295  * the SCp.xxx fields is that they're always associated with a given
 296  * cmd, and are preserved across disconnect-reselect. This means we
 297  * can pretty much ignore SAVE_POINTERS and RESTORE_POINTERS messages
 298  * if we keep all the critical pointers and counters in SCp:
 299  *  - SCp.ptr is the pointer into the RAM buffer
 300  *  - SCp.this_residual is the size of that buffer
 301  *  - SCp.buffer points to the current scatter-gather buffer
 302  *  - SCp.buffers_residual tells us how many S.G. buffers there are
 303  *  - SCp.have_data_in is not used
 304  *  - SCp.sent_command is not used
 305  *  - SCp.phase records this command's SRCID_ER bit setting
 306  */
 307 
 308    if (cmd->use_sg) {
 309       cmd->SCp.buffer = (struct scatterlist *)cmd->buffer;
 310       cmd->SCp.buffers_residual = cmd->use_sg - 1;
 311       cmd->SCp.ptr = (char *)cmd->SCp.buffer->address;
 312       cmd->SCp.this_residual = cmd->SCp.buffer->length;
 313       }
 314    else {
 315       cmd->SCp.buffer = NULL;
 316       cmd->SCp.buffers_residual = 0;
 317       cmd->SCp.ptr = (char *)cmd->request_buffer;
 318       cmd->SCp.this_residual = cmd->request_bufflen;
 319       }
 320 
 321 /* Preset the command status to GOOD, since that's the normal case */
 322 
 323    cmd->SCp.Status = GOOD;
 324 
 325    /*
 326     * Add the cmd to the end of 'input_Q'. Note that REQUEST SENSE
 327     * commands are added to the head of the queue so that the desired
 328     * sense data is not lost before REQUEST_SENSE executes.
 329     */
 330 
 331    if (!(hostdata->input_Q) || (cmd->cmnd[0] == REQUEST_SENSE)) {
 332       cmd->host_scribble = (uchar *)hostdata->input_Q;
 333       hostdata->input_Q = cmd;
 334       }
 335    else {   /* find the end of the queue */
 336       for (tmp=(Scsi_Cmnd *)hostdata->input_Q; tmp->host_scribble;
 337             tmp=(Scsi_Cmnd *)tmp->host_scribble)
 338          ;
 339       tmp->host_scribble = (uchar *)cmd;
 340       }
 341 
 342 /* We know that there's at least one command in 'input_Q' now.
 343  * Go see if any of them are runnable!
 344  */
 345 
 346    wd33c93_execute(cmd->host);
 347 
 348 DB(DB_QUEUE_COMMAND,printk(")Q-%ld ",cmd->pid))
 349 
 350    restore_flags(flags);
 351    return 0;
 352 }
 353 
 354 
 355 
 356 /*
 357  * This routine attempts to start a scsi command. If the host_card is
 358  * already connected, we give up immediately. Otherwise, look through
 359  * the input_Q, using the first command we find that's intended
 360  * for a currently non-busy target/lun.
 361  */
 362 void wd33c93_execute (struct Scsi_Host *instance)
     /*  */
 363 {
 364 struct WD33C93_hostdata *hostdata;
 365 wd33c93_regs *regp;
 366 Scsi_Cmnd *cmd, *prev;
 367 unsigned long flags;
 368 int i;
 369 
 370 
 371    save_flags(flags);
 372    cli();
 373    hostdata = (struct WD33C93_hostdata *)instance->hostdata;
 374    regp = hostdata->regp;
 375 
 376 DB(DB_EXECUTE,printk("EX("))
 377 
 378    if (hostdata->selecting || hostdata->connected) {
 379 
 380 DB(DB_EXECUTE,printk(")EX-0 "))
 381 
 382       restore_flags(flags);
 383       return;
 384       }
 385 
 386     /*
 387      * Search through the input_Q for a command destined
 388      * for an idle target/lun.
 389      */
 390 
 391    cmd = (Scsi_Cmnd *)hostdata->input_Q;
 392    prev = 0;
 393    while (cmd) {
 394       if (!(hostdata->busy[cmd->target] & (1 << cmd->lun)))
 395          break;
 396       prev = cmd;
 397       cmd = (Scsi_Cmnd *)cmd->host_scribble;
 398       }
 399 
 400    /* quit if queue empty or all possible targets are busy */
 401 
 402    if (!cmd) {
 403 
 404 DB(DB_EXECUTE,printk(")EX-1 "))
 405 
 406       restore_flags(flags);
 407       return;
 408       }
 409 
 410    /*  remove command from queue */
 411    
 412    if (prev)
 413       prev->host_scribble = cmd->host_scribble;
 414    else
 415       hostdata->input_Q = (Scsi_Cmnd *)cmd->host_scribble;
 416 
 417    /*
 418     * Start the selection process
 419     */
 420 
 421    if (IS_DIR_OUT(cmd))
 422       write_wd33c93(regp, WD_DESTINATION_ID, cmd->target);
 423    else
 424       write_wd33c93(regp, WD_DESTINATION_ID, cmd->target | DSTID_DPD);
 425 
 426 /* Now we need to figure out whether or not this command is a good
 427  * candidate for disconnect/reselect. We guess to the best of our
 428  * ability, based on a set of hierarchical rules. When several
 429  * devices are operating simultaneously, disconnects are usually
 430  * an advantage. In a single device system, or if only 1 device
 431  * is being accessed, transfers usually go faster if disconnects
 432  * are not allowed:
 433  *
 434  * + Commands should NEVER disconnect if hostdata->disconnect =
 435  *   DIS_NEVER (this holds for tape drives also), and ALWAYS
 436  *   disconnect if hostdata->disconnect = DIS_ALWAYS.
 437  * + Tape drive commands should always be allowed to disconnect.
 438  * + Disconnect should be allowed if disconnected_Q isn't empty.
 439  * + Commands should NOT disconnect if input_Q is empty.
 440  * + Disconnect should be allowed if there are commands in input_Q
 441  *   for a different target/lun. In this case, the other commands
 442  *   should be made disconnect-able, if not already.
 443  *
 444  * I know, I know - this code would flunk me out of any
 445  * "C Programming 101" class ever offered. But it's easy
 446  * to change around and experiment with for now.
 447  */
 448 
 449    cmd->SCp.phase = 0;  /* assume no disconnect */
 450    if (hostdata->disconnect == DIS_NEVER)
 451       goto no;
 452    if (hostdata->disconnect == DIS_ALWAYS)
 453       goto yes;
 454    if (cmd->device->type == 1)   /* tape drive? */
 455       goto yes;
 456    if (hostdata->disconnected_Q) /* other commands disconnected? */
 457       goto yes;
 458    if (!(hostdata->input_Q))     /* input_Q empty? */
 459       goto no;
 460    for (prev=(Scsi_Cmnd *)hostdata->input_Q; prev;
 461          prev=(Scsi_Cmnd *)prev->host_scribble) {
 462       if ((prev->target != cmd->target) || (prev->lun != cmd->lun)) {
 463          for (prev=(Scsi_Cmnd *)hostdata->input_Q; prev;
 464                prev=(Scsi_Cmnd *)prev->host_scribble)
 465             prev->SCp.phase = 1;
 466          goto yes;
 467          }
 468       }
 469    goto no;
 470 
 471 yes:
 472    cmd->SCp.phase = 1;
 473 
 474 #ifdef PROC_INTERFACE
 475    disc_allowed_total++;
 476 #endif
 477 
 478 no:
 479    write_wd33c93(regp, WD_SOURCE_ID, ((cmd->SCp.phase)?SRCID_ER:0));
 480 
 481    write_wd33c93(regp, WD_TARGET_LUN, cmd->lun);
 482    write_wd33c93(regp,WD_SYNCHRONOUS_TRANSFER,hostdata->sync_xfer[cmd->target]);
 483    hostdata->busy[cmd->target] |= (1 << cmd->lun);
 484 
 485    if ((hostdata->level2 == L2_NONE) ||
 486        (hostdata->sync_stat[cmd->target] == SS_UNSET)) {
 487 
 488          /*
 489           * Do a 'Select-With-ATN' command. This will end with
 490           * one of the following interrupts:
 491           *    CSR_RESEL_AM:  failure - can try again later.
 492           *    CSR_TIMEOUT:   failure - give up.
 493           *    CSR_SELECT:    success - proceed.
 494           */
 495 
 496       hostdata->selecting = cmd;
 497 
 498 /* Every target has its own synchronous transfer setting, kept in the
 499  * sync_xfer array, and a corresponding status byte in sync_stat[].
 500  * Each target's sync_stat[] entry is initialized to SX_UNSET, and its
 501  * sync_xfer[] entry is initialized to the default/safe value. SS_UNSET
 502  * means that the parameters are undetermined as yet, and that we
 503  * need to send an SDTR message to this device after selection is
 504  * complete. We set SS_FIRST to tell the interrupt routine to do so,
 505  * unless we've been asked not to try synchronous transfers on this
 506  * target (and _all_ luns within it): In this case we set SS_SET to
 507  * make the defaults final.
 508  */
 509       if (hostdata->sync_stat[cmd->target] == SS_UNSET) {
 510          if (hostdata->no_sync & (1 << cmd->target))
 511             hostdata->sync_stat[cmd->target] = SS_SET;
 512          else
 513             hostdata->sync_stat[cmd->target] = SS_FIRST;
 514          }
 515       hostdata->state = S_SELECTING;
 516       write_wd33c93_count(regp,0); /* guarantee a DATA_PHASE interrupt */
 517       write_wd33c93_cmd(regp, WD_CMD_SEL_ATN);
 518       }
 519 
 520    else {
 521 
 522          /*
 523           * Do a 'Select-With-ATN-Xfer' command. This will end with
 524           * one of the following interrupts:
 525           *    CSR_RESEL_AM:  failure - can try again later.
 526           *    CSR_TIMEOUT:   failure - give up.
 527           *    anything else: success - proceed.
 528           */
 529 
 530       hostdata->connected = cmd;
 531       write_wd33c93(regp, WD_COMMAND_PHASE, 0);
 532 
 533    /* copy command_descriptor_block into WD chip
 534     * (take advantage of auto-incrementing)
 535     */
 536 
 537       regp->SASR = WD_CDB_1;
 538       for (i=0; i<cmd->cmd_len; i++)
 539          regp->SCMD = cmd->cmnd[i];
 540 
 541    /* The wd33c93 only knows about Group 0, 1, and 5 commands when
 542     * it's doing a 'select-and-transfer'. To be safe, we write the
 543     * size of the CDB into the OWN_ID register for every case. This
 544     * way there won't be problems with vendor-unique, audio, etc.
 545     */
 546 
 547       write_wd33c93(regp, WD_OWN_ID, cmd->cmd_len);
 548 
 549    /* When doing a non-disconnect command, we can save ourselves a DATA
 550     * phase interrupt later by setting everything up now.
 551     */
 552 
 553       if (cmd->SCp.phase == 0) {
 554          if (hostdata->dma_setup(cmd,
 555                      (IS_DIR_OUT(cmd))?DATA_OUT_DIR:DATA_IN_DIR))
 556             write_wd33c93_count(regp,0); /* guarantee a DATA_PHASE interrupt */
 557          else {
 558             write_wd33c93_count(regp, cmd->SCp.this_residual);
 559             write_wd33c93(regp,WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_DMA);
 560             hostdata->dma = D_DMA_RUNNING;
 561             }
 562          }
 563       else
 564          write_wd33c93_count(regp,0); /* guarantee a DATA_PHASE interrupt */
 565 
 566       hostdata->state = S_RUNNING_LEVEL2;
 567       write_wd33c93_cmd(regp, WD_CMD_SEL_ATN_XFER);
 568       }
 569 
 570    /*
 571     * Since the SCSI bus can handle only 1 connection at a time,
 572     * we get out of here now. If the selection fails, or when
 573     * the command disconnects, we'll come back to this routine
 574     * to search the input_Q again...
 575     */
 576       
 577 DB(DB_EXECUTE,printk("%s%ld)EX-2 ",(cmd->SCp.phase)?"d:":"",cmd->pid))
 578 
 579    restore_flags(flags);
 580 }
 581 
 582 
 583 
 584 void transfer_pio(wd33c93_regs *regp, uchar *buf, int cnt,
     /*  */
 585                   int data_in_dir, struct WD33C93_hostdata *hostdata)
 586 {
 587 uchar asr;
 588 
 589 DB(DB_TRANSFER,printk("(%p,%d,%s)",buf,cnt,data_in_dir?"in":"out"))
 590 
 591    write_wd33c93(regp, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED);
 592    write_wd33c93_count(regp,cnt);
 593    write_wd33c93_cmd(regp, WD_CMD_TRANS_INFO);
 594    if (data_in_dir) {
 595       do {
 596          asr = READ_AUX_STAT();
 597          if (asr & ASR_DBR)
 598             *buf++ = read_wd33c93(regp, WD_DATA);
 599          } while (!(asr & ASR_INT));
 600       }
 601    else {
 602       do {
 603          asr = READ_AUX_STAT();
 604          if (asr & ASR_DBR)
 605             write_wd33c93(regp, WD_DATA, *buf++);
 606          } while (!(asr & ASR_INT));
 607       }
 608 
 609    /* Note: we are returning with the interrupt UN-cleared.
 610    * Since (presumably) an entire I/O operation has
 611    * completed, the bus phase is probably different, and
 612    * the interrupt routine will discover this when it
 613    * responds to the uncleared int.
 614    */
 615 
 616 }
 617 
 618 
 619 
 620 void transfer_bytes(wd33c93_regs *regp, Scsi_Cmnd *cmd, int data_in_dir)
     /*  */
 621 {
 622 struct WD33C93_hostdata *hostdata;
 623 
 624    hostdata = (struct WD33C93_hostdata *)cmd->host->hostdata;
 625 
 626 /* Normally, you'd expect 'this_residual' to be non-zero here.
 627  * In a series of scatter-gather transfers, however, this
 628  * routine will usually be called with 'this_residual' equal
 629  * to 0 and 'buffers_residual' non-zero. This means that a
 630  * previous transfer completed, clearing 'this_residual', and
 631  * now we need to setup the next scatter-gather buffer as the
 632  * source or destination for THIS transfer.
 633  */
 634    if (!cmd->SCp.this_residual && cmd->SCp.buffers_residual) {
 635       ++cmd->SCp.buffer;
 636       --cmd->SCp.buffers_residual;
 637       cmd->SCp.this_residual = cmd->SCp.buffer->length;
 638       cmd->SCp.ptr = cmd->SCp.buffer->address;
 639       }
 640 
 641    write_wd33c93(regp,WD_SYNCHRONOUS_TRANSFER,hostdata->sync_xfer[cmd->target]);
 642 
 643 /* 'dma_setup()' will return TRUE if we can't do DMA. */
 644 
 645    if (hostdata->dma_setup(cmd, data_in_dir)) {
 646       transfer_pio(regp, (uchar *)&cmd->SCp.ptr, cmd->SCp.this_residual,
 647                          data_in_dir, hostdata);
 648       }
 649 
 650 /* We are able to do DMA (in fact, the Amiga hardware is
 651  * already going!), so start up the wd33c93 in DMA mode.
 652  * We set 'hostdata->dma' = D_DMA_RUNNING so that when the
 653  * transfer completes and causes an interrupt, we're
 654  * reminded to tell the Amiga to shut down its end. We'll
 655  * postpone the updating of 'this_residual' and 'ptr'
 656  * until then.
 657  */
 658 
 659    else {
 660       write_wd33c93(regp, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_DMA);
 661       write_wd33c93_count(regp,cmd->SCp.this_residual);
 662 
 663       if ((hostdata->level2 >= L2_DATA) || (cmd->SCp.phase == 0)) {
 664          write_wd33c93(regp, WD_COMMAND_PHASE, 0x45);
 665          write_wd33c93_cmd(regp, WD_CMD_SEL_ATN_XFER);
 666          hostdata->state = S_RUNNING_LEVEL2;
 667          }
 668       else
 669          write_wd33c93_cmd(regp, WD_CMD_TRANS_INFO);
 670 
 671       hostdata->dma = D_DMA_RUNNING;
 672       }
 673 }
 674 
 675 
 676 
 677 void wd33c93_intr (struct Scsi_Host *instance)
     /*  */
 678 {
 679 struct WD33C93_hostdata *hostdata;
 680 Scsi_Cmnd *patch, *cmd;
 681 wd33c93_regs *regp;
 682 unsigned long flags;
 683 uchar asr, sr, phs, id, lun, *ucp, msg;
 684 unsigned long length;
 685 
 686 
 687    hostdata = (struct WD33C93_hostdata *)instance->hostdata;
 688    regp = hostdata->regp;
 689 
 690    asr = READ_AUX_STAT();
 691    if (!(asr & ASR_INT) || (asr & ASR_BSY))
 692       return;
 693 
 694 /* OK - it should be safe to re-enable system interrupts */
 695 
 696    save_flags(flags);
 697    sti();
 698 
 699    cmd = (Scsi_Cmnd *)hostdata->connected;   /* assume we're connected */
 700    sr = read_wd33c93(regp, WD_SCSI_STATUS);  /* clear the interrupt */
 701    phs = read_wd33c93(regp, WD_COMMAND_PHASE);
 702 
 703 DB(DB_INTR,printk("{%02x:%02x-",asr,sr))
 704 
 705 /* After starting a DMA transfer, the next interrupt
 706  * is guaranteed to be in response to completion of
 707  * the transfer. Since the Amiga DMA hardware runs in
 708  * in an open-ended fashion, it needs to be told when
 709  * to stop; do that here if D_DMA_RUNNING is true.
 710  * Also, we have to update 'this_residual' and 'ptr'
 711  * based on the contents of the TRANSFER_COUNT register,
 712  * in case the device decided to do an intermediate
 713  * disconnect (a device may do this if it has to do a
 714  * seek, or just to be nice and let other devices have
 715  * some bus time during long transfers). After doing
 716  * whatever is needed, we go on and service the WD3393
 717  * interrupt normally.
 718  */
 719 
 720    if (hostdata->dma == D_DMA_RUNNING) {
 721 DB(DB_TRANSFER,printk("[%p/%d:",cmd->SCp.ptr,cmd->SCp.this_residual))
 722       hostdata->dma_stop(cmd->host, cmd, 1);
 723       hostdata->dma = D_DMA_OFF;
 724       length = cmd->SCp.this_residual;
 725       cmd->SCp.this_residual = read_wd33c93_count(regp);
 726       cmd->SCp.ptr += (length - cmd->SCp.this_residual);
 727 DB(DB_TRANSFER,printk("%p/%d]",cmd->SCp.ptr,cmd->SCp.this_residual))
 728       }
 729 
 730 /* Respond to the specific WD3393 interrupt - there are quite a few! */
 731 
 732    switch (sr) {
 733 
 734       case CSR_TIMEOUT:
 735 DB(DB_INTR,printk("TIMEOUT"))
 736 
 737          cli();
 738          if (hostdata->state == S_RUNNING_LEVEL2)
 739             hostdata->connected = NULL;
 740          else {
 741             cmd = (Scsi_Cmnd *)hostdata->selecting;   /* get a valid cmd */
 742             hostdata->selecting = NULL;
 743             }
 744 
 745          cmd->result = DID_NO_CONNECT << 16;
 746          hostdata->busy[cmd->target] &= ~(1 << cmd->lun);
 747          hostdata->state = S_UNCONNECTED;
 748          cmd->scsi_done(cmd);
 749 
 750 /* We are not connected to a target - check to see if there
 751  * are commands waiting to be executed.
 752  */
 753 
 754          sti();
 755          wd33c93_execute(instance);
 756          break;
 757 
 758 
 759 /* Note: this interrupt should not occur in a LEVEL2 command */
 760 
 761       case CSR_SELECT:
 762          cli();
 763 DB(DB_INTR,printk("SELECT"))
 764          hostdata->connected = cmd = (Scsi_Cmnd *)hostdata->selecting;
 765          hostdata->selecting = NULL;
 766 
 767       /* construct an IDENTIFY message with correct disconnect bit */
 768 
 769          hostdata->outgoing_msg[0] = (0x80 | 0x00 | cmd->lun);
 770          if (cmd->SCp.phase)
 771             hostdata->outgoing_msg[0] |= 0x40;
 772 
 773          if (hostdata->sync_stat[cmd->target] == SS_FIRST) {
 774 #ifdef SYNC_DEBUG
 775 printk(" sending SDTR ");
 776 #endif
 777 
 778             hostdata->sync_stat[cmd->target] = SS_WAITING;
 779 
 780       /* tack on a 2nd message to ask about synchronous transfers */
 781 
 782             hostdata->outgoing_msg[1] = EXTENDED_MESSAGE;
 783             hostdata->outgoing_msg[2] = 3;
 784             hostdata->outgoing_msg[3] = EXTENDED_SDTR;
 785             hostdata->outgoing_msg[4] = OPTIMUM_SX_PER/4;
 786             hostdata->outgoing_msg[5] = OPTIMUM_SX_OFF;
 787             hostdata->outgoing_len = 6;
 788             }
 789          else
 790             hostdata->outgoing_len = 1;
 791 
 792          hostdata->state = S_CONNECTED;
 793          break;
 794 
 795 
 796       case CSR_XFER_DONE|PHS_DATA_IN:
 797       case CSR_UNEXP    |PHS_DATA_IN:
 798       case CSR_SRV_REQ  |PHS_DATA_IN:
 799 DB(DB_INTR,printk("IN-%d.%d",cmd->SCp.this_residual,cmd->SCp.buffers_residual))
 800          transfer_bytes(regp, cmd, DATA_IN_DIR);
 801          if (hostdata->state != S_RUNNING_LEVEL2)
 802             hostdata->state = S_CONNECTED;
 803          break;
 804 
 805 
 806       case CSR_XFER_DONE|PHS_DATA_OUT:
 807       case CSR_UNEXP    |PHS_DATA_OUT:
 808       case CSR_SRV_REQ  |PHS_DATA_OUT:
 809 DB(DB_INTR,printk("OUT-%d.%d",cmd->SCp.this_residual,cmd->SCp.buffers_residual))
 810          transfer_bytes(regp, cmd, DATA_OUT_DIR);
 811          if (hostdata->state != S_RUNNING_LEVEL2)
 812             hostdata->state = S_CONNECTED;
 813          break;
 814 
 815 
 816 /* Note: this interrupt should not occur in a LEVEL2 command */
 817 
 818       case CSR_XFER_DONE|PHS_COMMAND:
 819       case CSR_UNEXP    |PHS_COMMAND:
 820       case CSR_SRV_REQ  |PHS_COMMAND:
 821 DB(DB_INTR,printk("CMND-%02x,%ld",cmd->cmnd[0],cmd->pid))
 822          transfer_pio(regp, cmd->cmnd, cmd->cmd_len, DATA_OUT_DIR, hostdata);
 823          hostdata->state = S_CONNECTED;
 824          break;
 825 
 826 
 827       case CSR_XFER_DONE|PHS_STATUS:
 828       case CSR_UNEXP    |PHS_STATUS:
 829       case CSR_SRV_REQ  |PHS_STATUS:
 830 DB(DB_INTR,printk("STATUS"))
 831 
 832          cmd->SCp.Status = read_1_byte(regp);
 833          if (hostdata->level2 >= L2_BASIC) {
 834             sr = read_wd33c93(regp, WD_SCSI_STATUS);  /* clear interrupt */
 835             hostdata->state = S_RUNNING_LEVEL2;
 836             write_wd33c93(regp, WD_COMMAND_PHASE, 0x50);
 837             write_wd33c93_cmd(regp, WD_CMD_SEL_ATN_XFER);
 838             }
 839          else {
 840 DB(DB_INTR,printk("=%02x",cmd->SCp.Status))
 841             hostdata->state = S_CONNECTED;
 842             }
 843          break;
 844 
 845 
 846       case CSR_XFER_DONE|PHS_MESS_IN:
 847       case CSR_UNEXP    |PHS_MESS_IN:
 848       case CSR_SRV_REQ  |PHS_MESS_IN:
 849 DB(DB_INTR,printk("MSG_IN="))
 850 
 851          cli();
 852          msg = read_1_byte(regp);
 853          sr = read_wd33c93(regp, WD_SCSI_STATUS);  /* clear interrupt */
 854 
 855          hostdata->incoming_msg[hostdata->incoming_ptr] = msg;
 856          if (hostdata->incoming_msg[0] == EXTENDED_MESSAGE)
 857             msg = EXTENDED_MESSAGE;
 858          else
 859             hostdata->incoming_ptr = 0;
 860 
 861          cmd->SCp.Message = msg;
 862          switch (msg) {
 863 
 864             case COMMAND_COMPLETE:
 865 DB(DB_INTR,printk("CCMP-%ld",cmd->pid))
 866                write_wd33c93_cmd(regp,WD_CMD_NEGATE_ACK);
 867                hostdata->state = S_PRE_CMP_DISC;
 868                break;
 869 
 870             case SAVE_POINTERS:
 871 DB(DB_INTR,printk("SDP"))
 872                write_wd33c93_cmd(regp,WD_CMD_NEGATE_ACK);
 873                hostdata->state = S_CONNECTED;
 874                break;
 875 
 876             case RESTORE_POINTERS:
 877 DB(DB_INTR,printk("RDP"))
 878                if (hostdata->level2 >= L2_BASIC) {
 879                   write_wd33c93(regp, WD_COMMAND_PHASE, 0x45);
 880                   write_wd33c93_cmd(regp, WD_CMD_SEL_ATN_XFER);
 881                   hostdata->state = S_RUNNING_LEVEL2;
 882                   }
 883                else {
 884                   write_wd33c93_cmd(regp, WD_CMD_NEGATE_ACK);
 885                   hostdata->state = S_CONNECTED;
 886                   }
 887                break;
 888 
 889             case DISCONNECT:
 890 DB(DB_INTR,printk("DIS"))
 891                cmd->device->disconnect = 1;
 892                write_wd33c93_cmd(regp,WD_CMD_NEGATE_ACK);
 893                hostdata->state = S_PRE_TMP_DISC;
 894                break;
 895 
 896             case MESSAGE_REJECT:
 897 DB(DB_INTR,printk("REJ"))
 898 #ifdef SYNC_DEBUG
 899 printk("-REJ-");
 900 #endif
 901                if (hostdata->sync_stat[cmd->target] == SS_WAITING)
 902                   hostdata->sync_stat[cmd->target] = SS_SET;
 903                write_wd33c93_cmd(regp,WD_CMD_NEGATE_ACK);
 904                hostdata->state = S_CONNECTED;
 905                break;
 906 
 907             case EXTENDED_MESSAGE:
 908 DB(DB_INTR,printk("EXT"))
 909 
 910                ucp = hostdata->incoming_msg;
 911 
 912 #ifdef SYNC_DEBUG
 913 printk("%02x",ucp[hostdata->incoming_ptr]);
 914 #endif
 915          /* Is this the last byte of the extended message? */
 916 
 917                if ((hostdata->incoming_ptr >= 2) &&
 918                    (hostdata->incoming_ptr == (ucp[1] + 1))) {
 919 
 920                   switch (ucp[2]) {   /* what's the EXTENDED code? */
 921                      case EXTENDED_SDTR:
 922                         id = calc_sync_xfer(ucp[3],ucp[4]);
 923                         if (hostdata->sync_stat[cmd->target] != SS_WAITING) {
 924 
 925 /* A device has sent an unsolicited SDTR message; rather than go
 926  * through the effort of decoding it and then figuring out what
 927  * our reply should be, we're just gonna say that we have a
 928  * synchronous fifo depth of 0. This will result in asynchronous
 929  * transfers - not ideal but so much easier.
 930  * Actually, this is OK because it assures us that if we don't
 931  * specifically ask for sync transfers, we won't do any.
 932  */
 933 
 934                            write_wd33c93_cmd(regp,WD_CMD_ASSERT_ATN); /* want MESS_OUT */
 935                            hostdata->outgoing_msg[0] = EXTENDED_MESSAGE;
 936                            hostdata->outgoing_msg[1] = 3;
 937                            hostdata->outgoing_msg[2] = EXTENDED_SDTR;
 938                            hostdata->outgoing_msg[3] = hostdata->default_sx_per/4;
 939                            hostdata->outgoing_msg[4] = 0;
 940                            hostdata->outgoing_len = 5;
 941                            hostdata->sync_xfer[cmd->target] =
 942                                        calc_sync_xfer(hostdata->default_sx_per/4,0);
 943                            }
 944                         else {
 945                            hostdata->sync_xfer[cmd->target] = id;
 946                            }
 947 #ifdef SYNC_DEBUG
 948 printk("sync_xfer=%02x",hostdata->sync_xfer[cmd->target]);
 949 #endif
 950                         hostdata->sync_stat[cmd->target] = SS_SET;
 951                         write_wd33c93_cmd(regp,WD_CMD_NEGATE_ACK);
 952                         hostdata->state = S_CONNECTED;
 953                         break;
 954                      case EXTENDED_WDTR:
 955                         write_wd33c93_cmd(regp,WD_CMD_ASSERT_ATN); /* want MESS_OUT */
 956                         printk("sending WDTR ");
 957                         hostdata->outgoing_msg[0] = EXTENDED_MESSAGE;
 958                         hostdata->outgoing_msg[1] = 2;
 959                         hostdata->outgoing_msg[2] = EXTENDED_WDTR;
 960                         hostdata->outgoing_msg[3] = 0;   /* 8 bit transfer width */
 961                         hostdata->outgoing_len = 4;
 962                         write_wd33c93_cmd(regp,WD_CMD_NEGATE_ACK);
 963                         hostdata->state = S_CONNECTED;
 964                         break;
 965                      default:
 966                         write_wd33c93_cmd(regp,WD_CMD_ASSERT_ATN); /* want MESS_OUT */
 967                         printk("Rejecting Unknown Extended Message(%02x). ",ucp[2]);
 968                         hostdata->outgoing_msg[0] = MESSAGE_REJECT;
 969                         hostdata->outgoing_len = 1;
 970                         write_wd33c93_cmd(regp,WD_CMD_NEGATE_ACK);
 971                         hostdata->state = S_CONNECTED;
 972                         break;
 973                      }
 974                   hostdata->incoming_ptr = 0;
 975                   }
 976 
 977          /* We need to read more MESS_IN bytes for the extended message */
 978 
 979                else {
 980                   hostdata->incoming_ptr++;
 981                   write_wd33c93_cmd(regp,WD_CMD_NEGATE_ACK);
 982                   hostdata->state = S_CONNECTED;
 983                   }
 984                break;
 985 
 986             default:
 987                printk("Rejecting Unknown Message(%02x) ",msg);
 988                write_wd33c93_cmd(regp,WD_CMD_ASSERT_ATN); /* want MESS_OUT */
 989                hostdata->outgoing_msg[0] = MESSAGE_REJECT;
 990                hostdata->outgoing_len = 1;
 991                write_wd33c93_cmd(regp,WD_CMD_NEGATE_ACK);
 992                hostdata->state = S_CONNECTED;
 993             }
 994          break;
 995 
 996 
 997 /* Note: this interrupt will occur only after a LEVEL2 command */
 998 
 999       case CSR_SEL_XFER_DONE:
1000          cli();
1001 
1002 /* Make sure that reselection is enabled at this point - it may
1003  * have been turned off for the command that just completed.
1004  */
1005 
1006          write_wd33c93(regp,WD_SOURCE_ID, SRCID_ER);
1007          if (phs == 0x60) {
1008 DB(DB_INTR,printk("SX-DONE-%ld",cmd->pid))
1009             cmd->SCp.Message = COMMAND_COMPLETE;
1010             lun = read_wd33c93(regp, WD_TARGET_LUN);
1011             if (cmd->SCp.Status == GOOD)
1012                cmd->SCp.Status = lun;
1013             hostdata->connected = NULL;
1014             if (cmd->cmnd[0] != REQUEST_SENSE)
1015                cmd->result = cmd->SCp.Status | (cmd->SCp.Message << 8);
1016             else if (cmd->SCp.Status != GOOD)
1017                cmd->result = (cmd->result & 0x00ffff) | (DID_ERROR << 16);
1018             hostdata->busy[cmd->target] &= ~(1 << cmd->lun);
1019             hostdata->state = S_UNCONNECTED;
1020             cmd->scsi_done(cmd);
1021 
1022 /* We are no longer  connected to a target - check to see if
1023  * there are commands waiting to be executed.
1024  */
1025 
1026             wd33c93_execute(instance);
1027             }
1028          else {
1029             printk("%02x:%02x:%02x-%ld: Unknown SEL_XFER_DONE phase!!---",asr,sr,phs,cmd->pid);
1030             }
1031          break;
1032 
1033 
1034 /* Note: this interrupt will occur only after a LEVEL2 command */
1035 
1036       case CSR_SDP:
1037 DB(DB_INTR,printk("SDP"))
1038             hostdata->state = S_RUNNING_LEVEL2;
1039             write_wd33c93(regp, WD_COMMAND_PHASE, 0x41);
1040             write_wd33c93_cmd(regp, WD_CMD_SEL_ATN_XFER);
1041          break;
1042 
1043 
1044       case CSR_XFER_DONE|PHS_MESS_OUT:
1045       case CSR_UNEXP    |PHS_MESS_OUT:
1046       case CSR_SRV_REQ  |PHS_MESS_OUT:
1047 DB(DB_INTR,printk("MSG_OUT="))
1048 
1049 /* To get here, we've probably requested MESSAGE_OUT and have
1050  * already put the correct bytes in outgoing_msg[] and filled
1051  * in outgoing_len. We simply send them out to the SCSI bus.
1052  * Sometimes we get MESSAGE_OUT phase when we're not expecting
1053  * it - like when our SDTR message is rejected by a target. Some
1054  * targets send the REJECT before receiving all of the extended
1055  * message, and then seem to go back to MESSAGE_OUT for a byte
1056  * or two. Not sure why, or if I'm doing something wrong to
1057  * cause this to happen. Regardless, it seems that sending
1058  * NOP messages in these situations results in no harm and
1059  * makes everyone happy.
1060  */
1061 
1062          if (hostdata->outgoing_len == 0) {
1063             hostdata->outgoing_len = 1;
1064             hostdata->outgoing_msg[0] = NOP;
1065             }
1066          transfer_pio(regp, hostdata->outgoing_msg, hostdata->outgoing_len,
1067                             DATA_OUT_DIR, hostdata);
1068 DB(DB_INTR,printk("%02x",hostdata->outgoing_msg[0]))
1069          hostdata->outgoing_len = 0;
1070          hostdata->state = S_CONNECTED;
1071          break;
1072 
1073 
1074       case CSR_UNEXP_DISC:
1075 
1076 /* I think I've seen this after a request-sense that was in response
1077  * to an error condition, but not sure. We certainly need to do
1078  * something when we get this interrupt - the question is 'what?'.
1079  * Let's think positively, and assume some command has finished
1080  * in a legal manner (like a command that provokes a request-sense),
1081  * so we treat it as a normal command-complete-disconnect.
1082  */
1083 
1084          cli();
1085 
1086 /* Make sure that reselection is enabled at this point - it may
1087  * have been turned off for the command that just completed.
1088  */
1089 
1090          write_wd33c93(regp,WD_SOURCE_ID, SRCID_ER);
1091          if (cmd == NULL) {
1092             printk(" - Already disconnected! ");
1093             hostdata->state = S_UNCONNECTED;
1094             return;
1095             }
1096 DB(DB_INTR,printk("UNEXP_DISC-%ld",cmd->pid))
1097          hostdata->connected = NULL;
1098          hostdata->busy[cmd->target] &= ~(1 << cmd->lun);
1099          hostdata->state = S_UNCONNECTED;
1100          if (cmd->cmnd[0] != REQUEST_SENSE)
1101             cmd->result = cmd->SCp.Status | (cmd->SCp.Message << 8);
1102          else if (cmd->SCp.Status != GOOD)
1103             cmd->result = (cmd->result & 0x00ffff) | (DID_ERROR << 16);
1104          cmd->scsi_done(cmd);
1105 
1106 /* We are no longer connected to a target - check to see if
1107  * there are commands waiting to be executed.
1108  */
1109 
1110          wd33c93_execute(instance);
1111          break;
1112 
1113 
1114       case CSR_DISC:
1115          cli();
1116 
1117 /* Make sure that reselection is enabled at this point - it may
1118  * have been turned off for the command that just completed.
1119  */
1120 
1121          write_wd33c93(regp,WD_SOURCE_ID, SRCID_ER);
1122 DB(DB_INTR,printk("DISC-%ld",cmd->pid))
1123          if (cmd == NULL) {
1124             printk(" - Already disconnected! ");
1125             hostdata->state = S_UNCONNECTED;
1126             }
1127          switch (hostdata->state) {
1128             case S_PRE_CMP_DISC:
1129                hostdata->connected = NULL;
1130                hostdata->busy[cmd->target] &= ~(1 << cmd->lun);
1131                hostdata->state = S_UNCONNECTED;
1132                if (cmd->cmnd[0] != REQUEST_SENSE)
1133                   cmd->result = cmd->SCp.Status | (cmd->SCp.Message << 8);
1134                else if (cmd->SCp.Status != GOOD)
1135                   cmd->result = (cmd->result & 0x00ffff) | (DID_ERROR << 16);
1136                cmd->scsi_done(cmd);
1137                break;
1138             case S_PRE_TMP_DISC:
1139             case S_RUNNING_LEVEL2:
1140                cmd->host_scribble = (uchar *)hostdata->disconnected_Q;
1141                hostdata->disconnected_Q = cmd;
1142                hostdata->connected = NULL;
1143                hostdata->state = S_UNCONNECTED;
1144 
1145 #ifdef PROC_INTERFACE
1146                disc_taken_total++;
1147 #endif
1148 
1149                break;
1150             default:
1151                printk("*** Unexpected DISCONNECT interrupt! ***");
1152                hostdata->state = S_UNCONNECTED;
1153             }
1154 
1155 /* We are no longer connected to a target - check to see if
1156  * there are commands waiting to be executed.
1157  */
1158 
1159          wd33c93_execute(instance);
1160          break;
1161 
1162 
1163       case CSR_RESEL_AM:
1164 DB(DB_INTR,printk("RESEL"))
1165 
1166          cli();
1167 
1168    /* First we have to make sure this reselection didn't */
1169    /* happen during Arbitration/Selection of some other device. */
1170    /* If yes, put losing command back on top of input_Q. */
1171 
1172          if (hostdata->level2 <= L2_NONE) {
1173 
1174             if (hostdata->selecting) {
1175                cmd = (Scsi_Cmnd *)hostdata->selecting;
1176                hostdata->selecting = NULL;
1177                hostdata->busy[cmd->target] &= ~(1 << cmd->lun);
1178                cmd->host_scribble = (uchar *)hostdata->input_Q;
1179                hostdata->input_Q = cmd;
1180                }
1181             }
1182 
1183          else {
1184 
1185             if (cmd) {
1186                if (phs == 0x00) {
1187                   hostdata->busy[cmd->target] &= ~(1 << cmd->lun);
1188                   cmd->host_scribble = (uchar *)hostdata->input_Q;
1189                   hostdata->input_Q = cmd;
1190                   }
1191                else {
1192                   printk("---%02x:%02x:%02x-TROUBLE: Intrusive ReSelect!---",asr,sr,phs);
1193                   while (1)
1194                      printk("\r");
1195                   }
1196                }
1197 
1198             }
1199 
1200    /* OK - find out which device reselected us. */
1201 
1202          id = read_wd33c93(regp, WD_SOURCE_ID);
1203          id &= SRCID_MASK;
1204 
1205    /* and extract the lun from the ID message. (Note that we don't
1206     * bother to check for a valid message here - I guess this is
1207     * not the right way to go, but...)
1208     */
1209 
1210          lun = read_wd33c93(regp, WD_DATA);
1211          if (hostdata->level2 < L2_RESELECT)
1212             write_wd33c93_cmd(regp,WD_CMD_NEGATE_ACK);
1213          lun &= 7;
1214 
1215    /* Now we look for the command that's reconnecting. */
1216 
1217          cmd = (Scsi_Cmnd *)hostdata->disconnected_Q;
1218          patch = NULL;
1219          while (cmd) {
1220             if (id == cmd->target && lun == cmd->lun)
1221                break;
1222             patch = cmd;
1223             cmd = (Scsi_Cmnd *)cmd->host_scribble;
1224             }
1225 
1226    /* Hmm. Couldn't find a valid command.... What to do? */
1227 
1228          if (!cmd) {
1229             printk("---TROUBLE: target %d.%d not in disconnect queue---",id,lun);
1230             return;
1231             }
1232 
1233    /* Ok, found the command - now start it up again. */
1234 
1235          if (patch)
1236             patch->host_scribble = cmd->host_scribble;
1237          else
1238             hostdata->disconnected_Q = (Scsi_Cmnd *)cmd->host_scribble;
1239          hostdata->connected = cmd;
1240 
1241    /* We don't need to worry about 'initialize_SCp()' or 'hostdata->busy[]'
1242     * because these things are preserved over a disconnect.
1243     * But we DO need to fix the DPD bit so it's correct for this command.
1244     */
1245 
1246          if (IS_DIR_OUT(cmd))
1247             write_wd33c93(regp, WD_DESTINATION_ID, cmd->target);
1248          else
1249             write_wd33c93(regp, WD_DESTINATION_ID, cmd->target | DSTID_DPD);
1250          if (hostdata->level2 >= L2_RESELECT) {
1251             write_wd33c93_count(regp, 0);  /* we want a DATA_PHASE interrupt */
1252             write_wd33c93(regp, WD_COMMAND_PHASE, 0x45);
1253             write_wd33c93_cmd(regp, WD_CMD_SEL_ATN_XFER);
1254             hostdata->state = S_RUNNING_LEVEL2;
1255             }
1256          else
1257             hostdata->state = S_CONNECTED;
1258 
1259 DB(DB_INTR,printk("-%ld",cmd->pid))
1260          break;
1261          
1262       default:
1263          printk("--UNKNOWN INTERRUPT:%02x:%02x:%02x--",asr,sr,phs);
1264       }
1265 
1266    restore_flags(flags);
1267 
1268 DB(DB_INTR,printk("} "))
1269 
1270 }
1271 
1272 
1273 
1274 void reset_wd33c93(struct Scsi_Host *instance)
     /*  */
1275 {
1276 struct WD33C93_hostdata *hostdata;
1277 wd33c93_regs *regp;
1278 uchar sr;
1279 
1280    hostdata = (struct WD33C93_hostdata *)instance->hostdata;
1281    regp = hostdata->regp;
1282 
1283    write_wd33c93(regp, WD_OWN_ID, OWNID_EAF | OWNID_RAF |
1284                  instance->this_id | hostdata->clock_freq);
1285    write_wd33c93(regp, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED);
1286    write_wd33c93(regp, WD_SYNCHRONOUS_TRANSFER,
1287                  calc_sync_xfer(hostdata->default_sx_per/4,DEFAULT_SX_OFF));
1288    write_wd33c93(regp, WD_COMMAND, WD_CMD_RESET);
1289 
1290    while (!(READ_AUX_STAT() & ASR_INT))
1291       ;
1292    sr = read_wd33c93(regp, WD_SCSI_STATUS);
1293 
1294    hostdata->microcode = read_wd33c93(regp, WD_CDB_1);
1295    if (sr == 0x00)
1296       hostdata->chip = C_WD33C93;
1297    else if (sr == 0x01) {
1298       write_wd33c93(regp, WD_QUEUE_TAG, 0xa5);  /* any random number */
1299       sr = read_wd33c93(regp, WD_QUEUE_TAG);
1300       if (sr == 0xa5) {
1301          hostdata->chip = C_WD33C93B;
1302          write_wd33c93(regp, WD_QUEUE_TAG, 0);
1303          }
1304       else
1305          hostdata->chip = C_WD33C93A;
1306       }
1307    else
1308       hostdata->chip = C_UNKNOWN_CHIP;
1309 
1310    write_wd33c93(regp, WD_TIMEOUT_PERIOD, TIMEOUT_PERIOD_VALUE);
1311    write_wd33c93(regp, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED);
1312 }
1313 
1314 
1315 
1316 #if LINUX_VERSION_CODE >= 0x010300
1317 int wd33c93_reset(Scsi_Cmnd *SCpnt, unsigned int reset_flags)
     /*  */
1318 #else
1319 int wd33c93_reset(Scsi_Cmnd *SCpnt)
1320 #endif
1321 {
1322 unsigned long flags;
1323 struct Scsi_Host *instance;
1324 struct WD33C93_hostdata *hostdata;
1325 int i;
1326 
1327    instance = SCpnt->host;
1328    hostdata = (struct WD33C93_hostdata *)instance->hostdata;
1329 
1330    printk("scsi%d: reset. ", instance->host_no);
1331    save_flags(flags);
1332    cli();
1333 
1334    ((struct WD33C93_hostdata *)instance->hostdata)->dma_stop(instance,NULL,0);
1335    for (i = 0; i < 8; i++) {
1336       hostdata->busy[i] = 0;
1337       hostdata->sync_xfer[i] = calc_sync_xfer(DEFAULT_SX_PER/4,DEFAULT_SX_OFF);
1338       hostdata->sync_stat[i] = SS_UNSET;  /* using default sync values */
1339       }
1340    hostdata->input_Q = NULL;
1341    hostdata->selecting = NULL;
1342    hostdata->connected = NULL;
1343    hostdata->disconnected_Q = NULL;
1344    hostdata->state = S_UNCONNECTED;
1345    hostdata->dma = D_DMA_OFF;
1346    hostdata->incoming_ptr = 0;
1347    hostdata->outgoing_len = 0;
1348 
1349    reset_wd33c93(instance);
1350    SCpnt->result = DID_RESET << 16;
1351    restore_flags(flags);
1352    return 0;
1353 }
1354 
1355 
1356 
1357 int wd33c93_abort (Scsi_Cmnd *cmd)
     /*  */
1358 {
1359 struct Scsi_Host *instance;
1360 struct WD33C93_hostdata *hostdata;
1361 wd33c93_regs *regp;
1362 Scsi_Cmnd *tmp, *prev;
1363 unsigned long flags;
1364 
1365    save_flags (flags);
1366    cli();
1367 
1368    instance = cmd->host;
1369    hostdata = (struct WD33C93_hostdata *)instance->hostdata;
1370    regp = hostdata->regp;
1371 
1372 /*
1373  * Case 1 : If the command hasn't been issued yet, we simply remove it
1374  *     from the input_Q.
1375  */
1376 
1377    tmp = (Scsi_Cmnd *)hostdata->input_Q;
1378    prev = 0;
1379    while (tmp) {
1380       if (tmp == cmd) {
1381          if (prev)
1382             prev->host_scribble = cmd->host_scribble;
1383          cmd->host_scribble = NULL;
1384          cmd->result = DID_ABORT << 16;
1385          printk("scsi%d: Abort - removing command %ld from input_Q. ",
1386            instance->host_no, cmd->pid);
1387          cmd->scsi_done(cmd);
1388          restore_flags(flags);
1389          return SCSI_ABORT_SUCCESS;
1390          }
1391       prev = tmp;
1392       tmp = (Scsi_Cmnd *)tmp->host_scribble;
1393       }
1394 
1395 /*
1396  * Case 2 : If the command is connected, we're going to fail the abort
1397  *     and let the high level SCSI driver retry at a later time or
1398  *     issue a reset.
1399  *
1400  *     Timeouts, and therefore aborted commands, will be highly unlikely
1401  *     and handling them cleanly in this situation would make the common
1402  *     case of noresets less efficient, and would pollute our code.  So,
1403  *     we fail.
1404  */
1405 
1406    if (hostdata->connected == cmd) {
1407       uchar sr, asr;
1408       unsigned long timeout;
1409 
1410       printk("scsi%d: Aborting connected command %ld - ",
1411               instance->host_no, cmd->pid);
1412 
1413       printk("stopping DMA - ");
1414       if (hostdata->dma == D_DMA_RUNNING) {
1415          hostdata->dma_stop(instance, cmd, 0);
1416          hostdata->dma = D_DMA_OFF;
1417          }
1418 
1419       printk("sending wd33c93 ABORT command - ");
1420       write_wd33c93(regp, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED);
1421       write_wd33c93_cmd(regp, WD_CMD_ABORT);
1422 
1423 /* Now we have to attempt to flush out the FIFO... */
1424 
1425       printk("flushing fifo - ");
1426       timeout = 1000000;
1427       do {
1428          asr = READ_AUX_STAT();
1429          if (asr & ASR_DBR)
1430             read_wd33c93(regp, WD_DATA);
1431          } while (!(asr & ASR_INT) && timeout-- > 0);
1432       sr = read_wd33c93(regp, WD_SCSI_STATUS);
1433       printk("asr=%02x, sr=%02x, %ld bytes un-transferred (timeout=%ld) - ",
1434              asr, sr, read_wd33c93_count(regp), timeout);
1435 
1436    /*
1437     * Abort command processed.
1438     * Still connected.
1439     * We must disconnect.
1440     */
1441 
1442       printk("sending wd33c93 DISCONNECT command - ");
1443       write_wd33c93_cmd(regp, WD_CMD_DISCONNECT);
1444 
1445       timeout = 1000000;
1446       asr = READ_AUX_STAT();
1447       while ((asr & ASR_CIP) && timeout-- > 0)
1448          asr = READ_AUX_STAT();
1449       sr = read_wd33c93(regp, WD_SCSI_STATUS);
1450       printk("asr=%02x, sr=%02x.",asr,sr);
1451 
1452       hostdata->busy[cmd->target] &= ~(1 << cmd->lun);
1453       hostdata->connected = NULL;
1454       hostdata->state = S_UNCONNECTED;
1455       cmd->result = DID_ABORT << 16;
1456       cmd->scsi_done(cmd);
1457 
1458 /*      sti();*/
1459       wd33c93_execute (instance);
1460 
1461       restore_flags(flags);
1462       return SCSI_ABORT_SUCCESS;
1463       }
1464 
1465 /*
1466  * Case 3: If the command is currently disconnected from the bus,
1467  * we're not going to expend much effort here: Let's just return
1468  * an ABORT_SNOOZE and hope for the best...
1469  */
1470 
1471    tmp = (Scsi_Cmnd *)hostdata->disconnected_Q;
1472    while (tmp) {
1473       if (tmp == cmd) {
1474          printk("scsi%d: Abort - command %ld found on disconnected_Q - ",
1475                  instance->host_no, cmd->pid);
1476          printk("returning ABORT_SNOOZE. ");
1477          restore_flags(flags);
1478          return SCSI_ABORT_SNOOZE;
1479          }
1480       tmp = (Scsi_Cmnd *)tmp->host_scribble;
1481       }
1482 
1483 /*
1484  * Case 4 : If we reached this point, the command was not found in any of
1485  *     the queues.
1486  *
1487  * We probably reached this point because of an unlikely race condition
1488  * between the command completing successfully and the abortion code,
1489  * so we won't panic, but we will notify the user in case something really
1490  * broke.
1491  */
1492 
1493 /*   sti();*/
1494    wd33c93_execute (instance);
1495 
1496    restore_flags(flags);
1497    printk("scsi%d: warning : SCSI command probably completed successfully"
1498       "         before abortion. ", instance->host_no);
1499    return SCSI_ABORT_NOT_RUNNING;
1500 }
1501 
1502 
1503 
1504 #define MAX_WD33C93_HOSTS 4
1505 #define MAX_SETUP_STRINGS (sizeof(setup_strings) / sizeof(char *))
1506 #define SETUP_BUFFER_SIZE 200
1507 static char setup_buffer[SETUP_BUFFER_SIZE];
1508 static char setup_used[MAX_SETUP_STRINGS];
1509 
1510 void wd33c93_setup (char *str, int *ints)
     /*  */
1511 {
1512 int i,x;
1513 char *p1,*p2;
1514 
1515    /* The kernel does some processing of the command-line before calling
1516     * this function: If it begins with any decimal or hex number arguments,
1517     * ints[0] = how many numbers found and ints[1] through [n] are the values
1518     * themselves. str points to where the non-numeric arguments (if any)
1519     * start: We do our own parsing of those. We construct synthetic 'nosync'
1520     * keywords out of numeric args (to maintain compatibility with older
1521     * versions) and then add the rest of the arguments.
1522     */
1523 
1524    p1 = setup_buffer;
1525    *p1 = '\0';
1526    if (ints[0]) {
1527       for (i=0; i<ints[0]; i++) {
1528          x = vsprintf(p1,"nosync:0x%02x,",&(ints[i+1]));
1529          p1 += x;
1530          }
1531       }
1532    if (str)
1533       strncpy(p1, str, SETUP_BUFFER_SIZE - strlen(setup_buffer));
1534    setup_buffer[SETUP_BUFFER_SIZE - 1] = '\0';
1535    p1 = setup_buffer;
1536    i = 0;
1537    while (*p1 && (i < MAX_SETUP_STRINGS)) {
1538       p2 = strchr(p1, ',');
1539       if (p2) {
1540          *p2 = '\0';
1541          if (p1 != p2)
1542             setup_strings[i] = p1;
1543          p1 = p2 + 1;
1544          i++;
1545          }
1546       else {
1547          setup_strings[i] = p1;
1548          break;
1549          }
1550       }
1551    for (i=0; i<MAX_SETUP_STRINGS; i++)
1552       setup_used[i] = 0;
1553 }
1554 
1555 
1556 /* check_setup_strings() returns index if key found, 0 if not
1557  */
1558 
1559 int check_setup_strings(char *key, int *flags, int *val, char *buf)
     /*  */
1560 {
1561 int x;
1562 char *cp;
1563 
1564    for  (x=0; x<MAX_SETUP_STRINGS; x++) {
1565       if (setup_used[x])
1566          continue;
1567       if (!strncmp(setup_strings[x], key, strlen(key)))
1568          break;
1569       if (!strncmp(setup_strings[x], "next", strlen("next")))
1570          return 0;
1571       }
1572    if (x == MAX_SETUP_STRINGS)
1573       return 0;
1574    setup_used[x] = 1;
1575    cp = setup_strings[x] + strlen(key);
1576    *val = -1;
1577    if (*cp != ':')
1578       return ++x;
1579    cp++;
1580    if ((*cp >= '0') && (*cp <= '9')) {
1581       *val = simple_strtoul(cp,NULL,0);
1582       }
1583    return ++x;
1584 }
1585 
1586 
1587 
1588 void wd33c93_init (struct Scsi_Host *instance, wd33c93_regs *regs,
     /*  */
1589          dma_setup_t setup, dma_stop_t stop, int clock_freq)
1590 {
1591 struct WD33C93_hostdata *hostdata;
1592 int i;
1593 int flags;
1594 int val;
1595 char buf[32];
1596 
1597    hostdata = (struct WD33C93_hostdata *)instance->hostdata;
1598 
1599    hostdata->regp = regs;
1600    hostdata->clock_freq = clock_freq;
1601    hostdata->dma_setup = setup;
1602    hostdata->dma_stop = stop;
1603    hostdata->dma_bounce_buffer = NULL;
1604    hostdata->dma_bounce_len = 0;
1605    for (i = 0; i < 8; i++) {
1606       hostdata->busy[i] = 0;
1607       hostdata->sync_xfer[i] = calc_sync_xfer(DEFAULT_SX_PER/4,DEFAULT_SX_OFF);
1608       hostdata->sync_stat[i] = SS_UNSET;  /* using default sync values */
1609       }
1610    hostdata->input_Q = NULL;
1611    hostdata->selecting = NULL;
1612    hostdata->connected = NULL;
1613    hostdata->disconnected_Q = NULL;
1614    hostdata->state = S_UNCONNECTED;
1615    hostdata->dma = D_DMA_OFF;
1616    hostdata->level2 = L2_BASIC;
1617    hostdata->disconnect = DIS_ADAPTIVE;
1618    hostdata->args = DEBUG_DEFAULTS;
1619    hostdata->incoming_ptr = 0;
1620    hostdata->outgoing_len = 0;
1621    hostdata->default_sx_per = DEFAULT_SX_PER;
1622    hostdata->no_sync = 0xff;     /* sync defaults to off */
1623 
1624 #ifdef PROC_INTERFACE
1625    hostdata->proc = PR_VERSION|PR_INFO|PR_TOTALS|
1626                     PR_CONNECTED|PR_INPUTQ|PR_DISCQ|
1627                     PR_STOP;
1628 
1629    disc_allowed_total = 0;
1630    disc_taken_total = 0;
1631 #endif
1632 
1633 
1634    if (check_setup_strings("nosync",&flags,&val,buf))
1635       hostdata->no_sync = val;
1636 
1637    if (check_setup_strings("period",&flags,&val,buf))
1638       hostdata->default_sx_per = sx_table[round_period((unsigned int)val)].period_ns;
1639 
1640    if (check_setup_strings("disconnect",&flags,&val,buf)) {
1641       if ((val >= DIS_NEVER) && (val <= DIS_ALWAYS))
1642          hostdata->disconnect = val;
1643       else
1644          hostdata->disconnect = DIS_ADAPTIVE;
1645       }
1646 
1647    if (check_setup_strings("debug",&flags,&val,buf))
1648       hostdata->args = val & DB_MASK;
1649 
1650    if (check_setup_strings("clock",&flags,&val,buf)) {
1651       if (val>7 && val<11)
1652          val = WD33C93_FS_8_10;
1653       else if (val>11 && val<16)
1654          val = WD33C93_FS_12_15;
1655       else if (val>15 && val<21)
1656          val = WD33C93_FS_16_20;
1657       else
1658          val = WD33C93_FS_8_10;
1659       hostdata->clock_freq = val;
1660       }
1661 
1662    if ((i = check_setup_strings("next",&flags,&val,buf))) {
1663       while (i)
1664          setup_used[--i] = 1;
1665       }
1666 
1667 #ifdef PROC_INTERFACE
1668    if (check_setup_strings("proc",&flags,&val,buf))
1669       hostdata->proc = val;
1670 #endif
1671 
1672 
1673    cli();
1674    reset_wd33c93(instance);
1675    sti();
1676 
1677    printk("wd33c93-%d: chip=%s microcode=%02x\n",instance->host_no,
1678          (hostdata->chip==C_WD33C93)?"WD33c93":
1679          (hostdata->chip==C_WD33C93A)?"WD33c93A":
1680          (hostdata->chip==C_WD33C93B)?"WD33c93B":"unknown",
1681          hostdata->microcode);
1682 
1683 #ifdef DEBUGGING_ON
1684    printk("wd33c93-%d: setup_strings=",instance->host_no);
1685    for (i=0; i<MAX_SETUP_STRINGS; i++)
1686       printk("%s,",setup_strings[i]);
1687    printk("\n");
1688    printk("wd33c93-%d: debug_flags = %04x\n",instance->host_no,hostdata->args);
1689 #endif
1690    printk("wd33c93-%d: driver version %s - %s\n",instance->host_no,
1691                      WD33C93_VERSION,WD33C93_DATE);
1692    printk("wd33c93-%d: compiled on %s at %s\n",instance->host_no,
1693                      __DATE__,__TIME__);
1694 }
1695 
1696 
1697 int wd33c93_proc_info(char *buf, char **start, off_t off, int len, int hn, int in)
     /*  */
1698 {
1699 
1700 #ifdef PROC_INTERFACE
1701 
1702 char *bp;
1703 char tbuf[128];
1704 unsigned long flags;
1705 struct Scsi_Host *instance;
1706 struct WD33C93_hostdata *hd;
1707 Scsi_Cmnd *cmd;
1708 int x,i;
1709 static int stop = 0;
1710 
1711    for (instance=instance_list; instance; instance=instance->next) {
1712       if (instance->host_no == hn)
1713          break;
1714       }
1715    if (!instance) {
1716       printk("*** Hmm... Can't find host #%d!\n",hn);
1717       return (-ESRCH);
1718       }
1719    hd = (struct WD33C93_hostdata *)instance->hostdata;
1720 
1721 /* If 'in' is TRUE we need to _read_ the proc file. We accept the following
1722  * keywords (same format as command-line, but only ONE per read):
1723  *    debug
1724  *    disconnect
1725  *    period
1726  *    resync
1727  *    proc
1728  */
1729 
1730    if (in) {
1731       buf[len] = '\0';
1732       bp = buf;
1733       if (!strncmp(bp,"debug:",6)) {
1734          bp += 6;
1735          hd->args = simple_strtoul(bp,NULL,0) & DB_MASK;
1736          }
1737       else if (!strncmp(bp,"disconnect:",11)) {
1738          bp += 11;
1739          x = simple_strtoul(bp,NULL,0);
1740          if (x < DIS_NEVER || x > DIS_ALWAYS)
1741             x = DIS_ADAPTIVE;
1742          hd->disconnect = x;
1743          }
1744       else if (!strncmp(bp,"period:",7)) {
1745          bp += 7;
1746          x = simple_strtoul(bp,NULL,0);
1747          hd->default_sx_per = sx_table[round_period((unsigned int)x)].period_ns;
1748          }
1749       else if (!strncmp(bp,"resync:",7)) {
1750          bp += 7;
1751          x = simple_strtoul(bp,NULL,0);
1752          for (i=0; i<7; i++)
1753             if (x & (1<<i))
1754                hd->sync_stat[i] = SS_UNSET;
1755          }
1756       else if (!strncmp(bp,"proc:",5)) {
1757          bp += 5;
1758          hd->proc = simple_strtoul(bp,NULL,0);
1759          }
1760       return len;
1761       }
1762 
1763    save_flags(flags);
1764    cli();
1765    bp = buf;
1766    *bp = '\0';
1767    if (hd->proc & PR_VERSION) {
1768       sprintf(tbuf,"\nVersion %s - %s. Compiled %s %s",
1769             WD33C93_VERSION,WD33C93_DATE,__DATE__,__TIME__);
1770       strcat(bp,tbuf);
1771       }
1772    if (hd->proc & PR_INFO) {
1773       ;
1774       }
1775    if (hd->proc & PR_TOTALS) {
1776       sprintf(tbuf,"\n%ld disc_allowed, %ld disc_taken",
1777             disc_allowed_total,disc_taken_total);
1778       strcat(bp,tbuf);
1779       }
1780    if (hd->proc & PR_CONNECTED) {
1781       strcat(bp,"\nconnected:     ");
1782       if (hd->connected) {
1783          cmd = (Scsi_Cmnd *)hd->connected;
1784          sprintf(tbuf," %ld-%d:%d(%02x)",
1785                cmd->pid, cmd->target, cmd->lun, cmd->cmnd[0]);
1786          strcat(bp,tbuf);
1787          }
1788       }
1789    if (hd->proc & PR_INPUTQ) {
1790       strcat(bp,"\ninput_Q:       ");
1791       cmd = (Scsi_Cmnd *)hd->input_Q;
1792       while (cmd) {
1793          sprintf(tbuf," %ld-%d:%d(%02x)",
1794                cmd->pid, cmd->target, cmd->lun, cmd->cmnd[0]);
1795          strcat(bp,tbuf);
1796          cmd = (Scsi_Cmnd *)cmd->host_scribble;
1797          }
1798       }
1799    if (hd->proc & PR_DISCQ) {
1800       strcat(bp,"\ndisconnected_Q:");
1801       cmd = (Scsi_Cmnd *)hd->disconnected_Q;
1802       while (cmd) {
1803          sprintf(tbuf," %ld-%d:%d(%02x)",
1804                cmd->pid, cmd->target, cmd->lun, cmd->cmnd[0]);
1805          strcat(bp,tbuf);
1806          cmd = (Scsi_Cmnd *)cmd->host_scribble;
1807          }
1808       }
1809    strcat(bp,"\n");
1810    restore_flags(flags);
1811    *start = buf;
1812    if (stop) {
1813       stop = 0;
1814       return 0;
1815       }
1816    if (off > 0x40000)   /* ALWAYS stop after 256k bytes have been read */
1817       stop = 1;;
1818    if (hd->proc & PR_STOP)    /* stop every other time */
1819       stop = 1;
1820    return strlen(bp);
1821 
1822 #else    /* PROC_INTERFACE */
1823 
1824    return 0;
1825 
1826 #endif   /* PROC_INTERFACE */
1827 
1828 }
1829 
1830 
1831 #ifdef MODULE
1832 
1833 Scsi_Host_Template driver_template = WD33C93;
1834 
1835 #include "scsi_module.c"
1836 
1837 #endif
1838
/* */
root/drivers/scsi/wd33c93.c

DEFINITIONS
