drivers/scsi/initio.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /**************************************************************************
   3  * Initio 9100 device driver for Linux.
   4  *
   5  * Copyright (c) 1994-1998 Initio Corporation
   6  * Copyright (c) 1998 Bas Vermeulen <bvermeul@blackstar.xs4all.nl>
   7  * Copyright (c) 2004 Christoph Hellwig <hch@lst.de>
   8  * Copyright (c) 2007 Red Hat
   9  *
  10  *************************************************************************
  11  *
  12  * DESCRIPTION:
  13  *
  14  * This is the Linux low-level SCSI driver for Initio INI-9X00U/UW SCSI host
  15  * adapters
  16  *
  17  * 08/06/97 hc  - v1.01h
  18  *              - Support inic-940 and inic-935
  19  * 09/26/97 hc  - v1.01i
  20  *              - Make correction from J.W. Schultz suggestion
  21  * 10/13/97 hc  - Support reset function
  22  * 10/21/97 hc  - v1.01j
  23  *              - Support 32 LUN (SCSI 3)
  24  * 01/14/98 hc  - v1.01k
  25  *              - Fix memory allocation problem
  26  * 03/04/98 hc  - v1.01l
  27  *              - Fix tape rewind which will hang the system problem
  28  *              - Set can_queue to initio_num_scb
  29  * 06/25/98 hc  - v1.01m
  30  *              - Get it work for kernel version >= 2.1.75
  31  *              - Dynamic assign SCSI bus reset holding time in initio_init()
  32  * 07/02/98 hc  - v1.01n
  33  *              - Support 0002134A
  34  * 08/07/98 hc  - v1.01o
  35  *              - Change the initio_abort_srb routine to use scsi_done. <01>
  36  * 09/07/98 hl  - v1.02
  37  *              - Change the INI9100U define and proc_dir_entry to
  38  *                reflect the newer Kernel 2.1.118, but the v1.o1o
  39  *                should work with Kernel 2.1.118.
  40  * 09/20/98 wh  - v1.02a
  41  *              - Support Abort command.
  42  *              - Handle reset routine.
  43  * 09/21/98 hl  - v1.03
  44  *              - remove comments.
  45  * 12/09/98 bv  - v1.03a
  46  *              - Removed unused code
  47  * 12/13/98 bv  - v1.03b
  48  *              - Remove cli() locking for kernels >= 2.1.95. This uses
  49  *                spinlocks to serialize access to the pSRB_head and
  50  *                pSRB_tail members of the HCS structure.
  51  * 09/01/99 bv  - v1.03d
  52  *              - Fixed a deadlock problem in SMP.
  53  * 21/01/99 bv  - v1.03e
  54  *              - Add support for the Domex 3192U PCI SCSI
  55  *                This is a slightly modified patch by
  56  *                Brian Macy <bmacy@sunshinecomputing.com>
  57  * 22/02/99 bv  - v1.03f
  58  *              - Didn't detect the INIC-950 in 2.0.x correctly.
  59  *                Now fixed.
  60  * 05/07/99 bv  - v1.03g
  61  *              - Changed the assumption that HZ = 100
  62  * 10/17/03 mc  - v1.04
  63  *              - added new DMA API support
  64  * 06/01/04 jmd - v1.04a
  65  *              - Re-add reset_bus support
  66  **************************************************************************/
  67
  68 #include <linux/module.h>
  69 #include <linux/errno.h>
  70 #include <linux/delay.h>
  71 #include <linux/pci.h>
  72 #include <linux/init.h>
  73 #include <linux/blkdev.h>
  74 #include <linux/spinlock.h>
  75 #include <linux/stat.h>
  76 #include <linux/kernel.h>
  77 #include <linux/proc_fs.h>
  78 #include <linux/string.h>
  79 #include <linux/interrupt.h>
  80 #include <linux/ioport.h>
  81 #include <linux/slab.h>
  82 #include <linux/jiffies.h>
  83 #include <linux/dma-mapping.h>
  84 #include <asm/io.h>
  85
  86 #include <scsi/scsi.h>
  87 #include <scsi/scsi_cmnd.h>
  88 #include <scsi/scsi_device.h>
  89 #include <scsi/scsi_host.h>
  90 #include <scsi/scsi_tcq.h>
  91
  92 #include "initio.h"
  93
  94 #define SENSE_SIZE              14
  95
  96 #define i91u_MAXQUEUE           2
  97 #define i91u_REVID "Initio INI-9X00U/UW SCSI device driver; Revision: 1.04a"
  98
  99 #ifdef DEBUG_i91u
 100 static unsigned int i91u_debug = DEBUG_DEFAULT;
 101 #endif
 102
 103 static int initio_tag_enable = 1;
 104
 105 #ifdef DEBUG_i91u
 106 static int setup_debug = 0;
 107 #endif
 108
 109 static void i91uSCBPost(u8 * pHcb, u8 * pScb);
 110
 111 #define DEBUG_INTERRUPT 0
 112 #define DEBUG_QUEUE     0
 113 #define DEBUG_STATE     0
 114 #define INT_DISC        0
 115
 116 /*--- forward references ---*/
 117 static struct scsi_ctrl_blk *initio_find_busy_scb(struct initio_host * host, u16 tarlun);
 118 static struct scsi_ctrl_blk *initio_find_done_scb(struct initio_host * host);
 119
 120 static int tulip_main(struct initio_host * host);
 121
 122 static int initio_next_state(struct initio_host * host);
 123 static int initio_state_1(struct initio_host * host);
 124 static int initio_state_2(struct initio_host * host);
 125 static int initio_state_3(struct initio_host * host);
 126 static int initio_state_4(struct initio_host * host);
 127 static int initio_state_5(struct initio_host * host);
 128 static int initio_state_6(struct initio_host * host);
 129 static int initio_state_7(struct initio_host * host);
 130 static int initio_xfer_data_in(struct initio_host * host);
 131 static int initio_xfer_data_out(struct initio_host * host);
 132 static int initio_xpad_in(struct initio_host * host);
 133 static int initio_xpad_out(struct initio_host * host);
 134 static int initio_status_msg(struct initio_host * host);
 135
 136 static int initio_msgin(struct initio_host * host);
 137 static int initio_msgin_sync(struct initio_host * host);
 138 static int initio_msgin_accept(struct initio_host * host);
 139 static int initio_msgout_reject(struct initio_host * host);
 140 static int initio_msgin_extend(struct initio_host * host);
 141
 142 static int initio_msgout_ide(struct initio_host * host);
 143 static int initio_msgout_abort_targ(struct initio_host * host);
 144 static int initio_msgout_abort_tag(struct initio_host * host);
 145
 146 static int initio_bus_device_reset(struct initio_host * host);
 147 static void initio_select_atn(struct initio_host * host, struct scsi_ctrl_blk * scb);
 148 static void initio_select_atn3(struct initio_host * host, struct scsi_ctrl_blk * scb);
 149 static void initio_select_atn_stop(struct initio_host * host, struct scsi_ctrl_blk * scb);
 150 static int int_initio_busfree(struct initio_host * host);
 151 static int int_initio_scsi_rst(struct initio_host * host);
 152 static int int_initio_bad_seq(struct initio_host * host);
 153 static int int_initio_resel(struct initio_host * host);
 154 static int initio_sync_done(struct initio_host * host);
 155 static int wdtr_done(struct initio_host * host);
 156 static int wait_tulip(struct initio_host * host);
 157 static int initio_wait_done_disc(struct initio_host * host);
 158 static int initio_wait_disc(struct initio_host * host);
 159 static void tulip_scsi(struct initio_host * host);
 160 static int initio_post_scsi_rst(struct initio_host * host);
 161
 162 static void initio_se2_ew_en(unsigned long base);
 163 static void initio_se2_ew_ds(unsigned long base);
 164 static int initio_se2_rd_all(unsigned long base);
 165 static void initio_se2_update_all(unsigned long base);  /* setup default pattern */
 166 static void initio_read_eeprom(unsigned long base);
 167
 168 /* ---- INTERNAL VARIABLES ---- */
 169
 170 static NVRAM i91unvram;
 171 static NVRAM *i91unvramp;
 172
 173 static u8 i91udftNvRam[64] =
 174 {
 175         /*----------- header -----------*/
 176         0x25, 0xc9,             /* Signature    */
 177         0x40,                   /* Size         */
 178         0x01,                   /* Revision     */
 179         /* -- Host Adapter Structure -- */
 180         0x95,                   /* ModelByte0   */
 181         0x00,                   /* ModelByte1   */
 182         0x00,                   /* ModelInfo    */
 183         0x01,                   /* NumOfCh      */
 184         NBC1_DEFAULT,           /* BIOSConfig1  */
 185         0,                      /* BIOSConfig2  */
 186         0,                      /* HAConfig1    */
 187         0,                      /* HAConfig2    */
 188         /* SCSI channel 0 and target Structure  */
 189         7,                      /* SCSIid       */
 190         NCC1_DEFAULT,           /* SCSIconfig1  */
 191         0,                      /* SCSIconfig2  */
 192         0x10,                   /* NumSCSItarget */
 193
 194         NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
 195         NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
 196         NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
 197         NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
 198
 199         /* SCSI channel 1 and target Structure  */
 200         7,                      /* SCSIid       */
 201         NCC1_DEFAULT,           /* SCSIconfig1  */
 202         0,                      /* SCSIconfig2  */
 203         0x10,                   /* NumSCSItarget */
 204
 205         NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
 206         NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
 207         NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
 208         NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
 209         0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
 210         0, 0};                  /*      - CheckSum -            */
 211
 212
 213 static u8 initio_rate_tbl[8] =  /* fast 20      */
 214 {
 215                                 /* nanosecond divide by 4 */
 216         12,                     /* 50ns,  20M   */
 217         18,                     /* 75ns,  13.3M */
 218         25,                     /* 100ns, 10M   */
 219         31,                     /* 125ns, 8M    */
 220         37,                     /* 150ns, 6.6M  */
 221         43,                     /* 175ns, 5.7M  */
 222         50,                     /* 200ns, 5M    */
 223         62                      /* 250ns, 4M    */
 224 };
 225
 226 static void initio_do_pause(unsigned amount)
 227 {
 228         /* Pause for amount jiffies */
 229         unsigned long the_time = jiffies + amount;
 230
 231         while (time_before_eq(jiffies, the_time))
 232                 cpu_relax();
 233 }
 234
 235 /*-- forward reference --*/
 236
 237 /******************************************************************
 238  Input: instruction for  Serial E2PROM
 239
 240  EX: se2_rd(0 call se2_instr() to send address and read command
 241
 242          StartBit  OP_Code   Address                Data
 243          --------- --------  ------------------     -------
 244          1         1 , 0     A5,A4,A3,A2,A1,A0      D15-D0
 245
 246                  +-----------------------------------------------------
 247                  |
 248  CS -----+
 249                         +--+  +--+  +--+  +--+  +--+
 250                         ^  |  ^  |  ^  |  ^  |  ^  |
 251                         |  |  |  |  |  |  |  |  |  |
 252  CLK -------+  +--+  +--+  +--+  +--+  +--
 253  (leading edge trigger)
 254
 255                  +--1-----1--+
 256                  | SB    OP  |  OP    A5    A4
 257  DI  ----+           +--0------------------
 258  (address and cmd sent to nvram)
 259
 260          -------------------------------------------+
 261                                                                                                 |
 262  DO                                             +---
 263  (data sent from nvram)
 264
 265
 266 ******************************************************************/
 267
 268 /**
 269  *      initio_se2_instr        -       bitbang an instruction
 270  *      @base: Base of InitIO controller
 271  *      @instr: Instruction for serial E2PROM
 272  *
 273  *      Bitbang an instruction out to the serial E2Prom
 274  */
 275
 276 static void initio_se2_instr(unsigned long base, u8 instr)
 277 {
 278         int i;
 279         u8 b;
 280
 281         outb(SE2CS | SE2DO, base + TUL_NVRAM);          /* cs+start bit */
 282         udelay(30);
 283         outb(SE2CS | SE2CLK | SE2DO, base + TUL_NVRAM); /* +CLK */
 284         udelay(30);
 285
 286         for (i = 0; i < 8; i++) {
 287                 if (instr & 0x80)
 288                         b = SE2CS | SE2DO;              /* -CLK+dataBit */
 289                 else
 290                         b = SE2CS;                      /* -CLK */
 291                 outb(b, base + TUL_NVRAM);
 292                 udelay(30);
 293                 outb(b | SE2CLK, base + TUL_NVRAM);     /* +CLK */
 294                 udelay(30);
 295                 instr <<= 1;
 296         }
 297         outb(SE2CS, base + TUL_NVRAM);                  /* -CLK */
 298         udelay(30);
 299 }
 300
 301
 302 /**
 303  *      initio_se2_ew_en        -       Enable erase/write
 304  *      @base: Base address of InitIO controller
 305  *
 306  *      Enable erase/write state of serial EEPROM
 307  */
 308 void initio_se2_ew_en(unsigned long base)
 309 {
 310         initio_se2_instr(base, 0x30);   /* EWEN */
 311         outb(0, base + TUL_NVRAM);      /* -CS  */
 312         udelay(30);
 313 }
 314
 315
 316 /**
 317  *      initio_se2_ew_ds        -       Disable erase/write
 318  *      @base: Base address of InitIO controller
 319  *
 320  *      Disable erase/write state of serial EEPROM
 321  */
 322 void initio_se2_ew_ds(unsigned long base)
 323 {
 324         initio_se2_instr(base, 0);      /* EWDS */
 325         outb(0, base + TUL_NVRAM);      /* -CS  */
 326         udelay(30);
 327 }
 328
 329
 330 /**
 331  *      initio_se2_rd           -       read E2PROM word
 332  *      @base: Base of InitIO controller
 333  *      @addr: Address of word in E2PROM
 334  *
 335  *      Read a word from the NV E2PROM device
 336  */
 337 static u16 initio_se2_rd(unsigned long base, u8 addr)
 338 {
 339         u8 instr, rb;
 340         u16 val = 0;
 341         int i;
 342
 343         instr = (u8) (addr | 0x80);
 344         initio_se2_instr(base, instr);  /* READ INSTR */
 345
 346         for (i = 15; i >= 0; i--) {
 347                 outb(SE2CS | SE2CLK, base + TUL_NVRAM); /* +CLK */
 348                 udelay(30);
 349                 outb(SE2CS, base + TUL_NVRAM);          /* -CLK */
 350
 351                 /* sample data after the following edge of clock  */
 352                 rb = inb(base + TUL_NVRAM);
 353                 rb &= SE2DI;
 354                 val += (rb << i);
 355                 udelay(30);     /* 6/20/95 */
 356         }
 357
 358         outb(0, base + TUL_NVRAM);              /* no chip select */
 359         udelay(30);
 360         return val;
 361 }
 362
 363 /**
 364  *      initio_se2_wr           -       read E2PROM word
 365  *      @base: Base of InitIO controller
 366  *      @addr: Address of word in E2PROM
 367  *      @val: Value to write
 368  *
 369  *      Write a word to the NV E2PROM device. Used when recovering from
 370  *      a problem with the NV.
 371  */
 372 static void initio_se2_wr(unsigned long base, u8 addr, u16 val)
 373 {
 374         u8 rb;
 375         u8 instr;
 376         int i;
 377
 378         instr = (u8) (addr | 0x40);
 379         initio_se2_instr(base, instr);  /* WRITE INSTR */
 380         for (i = 15; i >= 0; i--) {
 381                 if (val & 0x8000)
 382                         outb(SE2CS | SE2DO, base + TUL_NVRAM);  /* -CLK+dataBit 1 */
 383                 else
 384                         outb(SE2CS, base + TUL_NVRAM);          /* -CLK+dataBit 0 */
 385                 udelay(30);
 386                 outb(SE2CS | SE2CLK, base + TUL_NVRAM);         /* +CLK */
 387                 udelay(30);
 388                 val <<= 1;
 389         }
 390         outb(SE2CS, base + TUL_NVRAM);                          /* -CLK */
 391         udelay(30);
 392         outb(0, base + TUL_NVRAM);                              /* -CS  */
 393         udelay(30);
 394
 395         outb(SE2CS, base + TUL_NVRAM);                          /* +CS  */
 396         udelay(30);
 397
 398         for (;;) {
 399                 outb(SE2CS | SE2CLK, base + TUL_NVRAM);         /* +CLK */
 400                 udelay(30);
 401                 outb(SE2CS, base + TUL_NVRAM);                  /* -CLK */
 402                 udelay(30);
 403                 if ((rb = inb(base + TUL_NVRAM)) & SE2DI)
 404                         break;  /* write complete */
 405         }
 406         outb(0, base + TUL_NVRAM);                              /* -CS */
 407 }
 408
 409 /**
 410  *      initio_se2_rd_all       -       read hostadapter NV configuration
 411  *      @base: Base address of InitIO controller
 412  *
 413  *      Reads the E2PROM data into main memory. Ensures that the checksum
 414  *      and header marker are valid. Returns 1 on success -1 on error.
 415  */
 416
 417 static int initio_se2_rd_all(unsigned long base)
 418 {
 419         int i;
 420         u16 chksum = 0;
 421         u16 *np;
 422
 423         i91unvramp = &i91unvram;
 424         np = (u16 *) i91unvramp;
 425         for (i = 0; i < 32; i++)
 426                 *np++ = initio_se2_rd(base, i);
 427
 428         /* Is signature "ini" ok ? */
 429         if (i91unvramp->NVM_Signature != INI_SIGNATURE)
 430                 return -1;
 431         /* Is ckecksum ok ? */
 432         np = (u16 *) i91unvramp;
 433         for (i = 0; i < 31; i++)
 434                 chksum += *np++;
 435         if (i91unvramp->NVM_CheckSum != chksum)
 436                 return -1;
 437         return 1;
 438 }
 439
 440 /**
 441  *      initio_se2_update_all           -       Update E2PROM
 442  *      @base: Base of InitIO controller
 443  *
 444  *      Update the E2PROM by wrting any changes into the E2PROM
 445  *      chip, rewriting the checksum.
 446  */
 447 static void initio_se2_update_all(unsigned long base)
 448 {                               /* setup default pattern */
 449         int i;
 450         u16 chksum = 0;
 451         u16 *np, *np1;
 452
 453         i91unvramp = &i91unvram;
 454         /* Calculate checksum first */
 455         np = (u16 *) i91udftNvRam;
 456         for (i = 0; i < 31; i++)
 457                 chksum += *np++;
 458         *np = chksum;
 459         initio_se2_ew_en(base); /* Enable write  */
 460
 461         np = (u16 *) i91udftNvRam;
 462         np1 = (u16 *) i91unvramp;
 463         for (i = 0; i < 32; i++, np++, np1++) {
 464                 if (*np != *np1)
 465                         initio_se2_wr(base, i, *np);
 466         }
 467         initio_se2_ew_ds(base); /* Disable write   */
 468 }
 469
 470 /**
 471  *      initio_read_eeprom              -       Retrieve configuration
 472  *      @base: Base of InitIO Host Adapter
 473  *
 474  *      Retrieve the host adapter configuration data from E2Prom. If the
 475  *      data is invalid then the defaults are used and are also restored
 476  *      into the E2PROM. This forms the access point for the SCSI driver
 477  *      into the E2PROM layer, the other functions for the E2PROM are all
 478  *      internal use.
 479  *
 480  *      Must be called single threaded, uses a shared global area.
 481  */
 482
 483 static void initio_read_eeprom(unsigned long base)
 484 {
 485         u8 gctrl;
 486
 487         i91unvramp = &i91unvram;
 488         /* Enable EEProm programming */
 489         gctrl = inb(base + TUL_GCTRL);
 490         outb(gctrl | TUL_GCTRL_EEPROM_BIT, base + TUL_GCTRL);
 491         if (initio_se2_rd_all(base) != 1) {
 492                 initio_se2_update_all(base);    /* setup default pattern */
 493                 initio_se2_rd_all(base);        /* load again  */
 494         }
 495         /* Disable EEProm programming */
 496         gctrl = inb(base + TUL_GCTRL);
 497         outb(gctrl & ~TUL_GCTRL_EEPROM_BIT, base + TUL_GCTRL);
 498 }
 499
 500 /**
 501  *      initio_stop_bm          -       stop bus master
 502  *      @host: InitIO we are stopping
 503  *
 504  *      Stop any pending DMA operation, aborting the DMA if necessary
 505  */
 506
 507 static void initio_stop_bm(struct initio_host * host)
 508 {
 509
 510         if (inb(host->addr + TUL_XStatus) & XPEND) {    /* if DMA xfer is pending, abort DMA xfer */
 511                 outb(TAX_X_ABT | TAX_X_CLR_FIFO, host->addr + TUL_XCmd);
 512                 /* wait Abort DMA xfer done */
 513                 while ((inb(host->addr + TUL_Int) & XABT) == 0)
 514                         cpu_relax();
 515         }
 516         outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
 517 }
 518
 519 /**
 520  *      initio_reset_scsi               -       Reset SCSI host controller
 521  *      @host: InitIO host to reset
 522  *      @seconds: Recovery time
 523  *
 524  *      Perform a full reset of the SCSI subsystem.
 525  */
 526
 527 static int initio_reset_scsi(struct initio_host * host, int seconds)
 528 {
 529         outb(TSC_RST_BUS, host->addr + TUL_SCtrl0);
 530
 531         while (!((host->jsint = inb(host->addr + TUL_SInt)) & TSS_SCSIRST_INT))
 532                 cpu_relax();
 533
 534         /* reset tulip chip */
 535         outb(0, host->addr + TUL_SSignal);
 536
 537         /* Stall for a while, wait for target's firmware ready,make it 2 sec ! */
 538         /* SONY 5200 tape drive won't work if only stall for 1 sec */
 539         /* FIXME: this is a very long busy wait right now */
 540         initio_do_pause(seconds * HZ);
 541
 542         inb(host->addr + TUL_SInt);
 543         return SCSI_RESET_SUCCESS;
 544 }
 545
 546 /**
 547  *      initio_init             -       set up an InitIO host adapter
 548  *      @host: InitIO host adapter
 549  *      @bios_addr: BIOS address
 550  *
 551  *      Set up the host adapter and devices according to the configuration
 552  *      retrieved from the E2PROM.
 553  *
 554  *      Locking: Calls E2PROM layer code which is not re-enterable so must
 555  *      run single threaded for now.
 556  */
 557
 558 static void initio_init(struct initio_host * host, u8 *bios_addr)
 559 {
 560         int i;
 561         u8 *flags;
 562         u8 *heads;
 563
 564         /* Get E2Prom configuration */
 565         initio_read_eeprom(host->addr);
 566         if (i91unvramp->NVM_SCSIInfo[0].NVM_NumOfTarg == 8)
 567                 host->max_tar = 8;
 568         else
 569                 host->max_tar = 16;
 570
 571         host->config = i91unvramp->NVM_SCSIInfo[0].NVM_ChConfig1;
 572
 573         host->scsi_id = i91unvramp->NVM_SCSIInfo[0].NVM_ChSCSIID;
 574         host->idmask = ~(1 << host->scsi_id);
 575
 576 #ifdef CHK_PARITY
 577         /* Enable parity error response */
 578         outb(inb(host->addr + TUL_PCMD) | 0x40, host->addr + TUL_PCMD);
 579 #endif
 580
 581         /* Mask all the interrupt       */
 582         outb(0x1F, host->addr + TUL_Mask);
 583
 584         initio_stop_bm(host);
 585         /* --- Initialize the tulip --- */
 586         outb(TSC_RST_CHIP, host->addr + TUL_SCtrl0);
 587
 588         /* program HBA's SCSI ID        */
 589         outb(host->scsi_id << 4, host->addr + TUL_SScsiId);
 590
 591         /* Enable Initiator Mode ,phase latch,alternate sync period mode,
 592            disable SCSI reset */
 593         if (host->config & HCC_EN_PAR)
 594                 host->sconf1 = (TSC_INITDEFAULT | TSC_EN_SCSI_PAR);
 595         else
 596                 host->sconf1 = (TSC_INITDEFAULT);
 597         outb(host->sconf1, host->addr + TUL_SConfig);
 598
 599         /* Enable HW reselect */
 600         outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1);
 601
 602         outb(0, host->addr + TUL_SPeriod);
 603
 604         /* selection time out = 250 ms */
 605         outb(153, host->addr + TUL_STimeOut);
 606
 607         /* Enable SCSI terminator */
 608         outb((host->config & (HCC_ACT_TERM1 | HCC_ACT_TERM2)),
 609                 host->addr + TUL_XCtrl);
 610         outb(((host->config & HCC_AUTO_TERM) >> 4) |
 611                 (inb(host->addr + TUL_GCTRL1) & 0xFE),
 612                 host->addr + TUL_GCTRL1);
 613
 614         for (i = 0,
 615              flags = & (i91unvramp->NVM_SCSIInfo[0].NVM_Targ0Config),
 616              heads = bios_addr + 0x180;
 617              i < host->max_tar;
 618              i++, flags++) {
 619                 host->targets[i].flags = *flags & ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
 620                 if (host->targets[i].flags & TCF_EN_255)
 621                         host->targets[i].drv_flags = TCF_DRV_255_63;
 622                 else
 623                         host->targets[i].drv_flags = 0;
 624                 host->targets[i].js_period = 0;
 625                 host->targets[i].sconfig0 = host->sconf1;
 626                 host->targets[i].heads = *heads++;
 627                 if (host->targets[i].heads == 255)
 628                         host->targets[i].drv_flags = TCF_DRV_255_63;
 629                 else
 630                         host->targets[i].drv_flags = 0;
 631                 host->targets[i].sectors = *heads++;
 632                 host->targets[i].flags &= ~TCF_BUSY;
 633                 host->act_tags[i] = 0;
 634                 host->max_tags[i] = 0xFF;
 635         }                       /* for                          */
 636         printk("i91u: PCI Base=0x%04X, IRQ=%d, BIOS=0x%04X0, SCSI ID=%d\n",
 637                host->addr, host->pci_dev->irq,
 638                host->bios_addr, host->scsi_id);
 639         /* Reset SCSI Bus */
 640         if (host->config & HCC_SCSI_RESET) {
 641                 printk(KERN_INFO "i91u: Reset SCSI Bus ... \n");
 642                 initio_reset_scsi(host, 10);
 643         }
 644         outb(0x17, host->addr + TUL_SCFG1);
 645         outb(0xE9, host->addr + TUL_SIntEnable);
 646 }
 647
 648 /**
 649  *      initio_alloc_scb                -       Allocate an SCB
 650  *      @host: InitIO host we are allocating for
 651  *
 652  *      Walk the SCB list for the controller and allocate a free SCB if
 653  *      one exists.
 654  */
 655 static struct scsi_ctrl_blk *initio_alloc_scb(struct initio_host *host)
 656 {
 657         struct scsi_ctrl_blk *scb;
 658         unsigned long flags;
 659
 660         spin_lock_irqsave(&host->avail_lock, flags);
 661         if ((scb = host->first_avail) != NULL) {
 662 #if DEBUG_QUEUE
 663                 printk("find scb at %p\n", scb);
 664 #endif
 665                 if ((host->first_avail = scb->next) == NULL)
 666                         host->last_avail = NULL;
 667                 scb->next = NULL;
 668                 scb->status = SCB_RENT;
 669         }
 670         spin_unlock_irqrestore(&host->avail_lock, flags);
 671         return scb;
 672 }
 673
 674 /**
 675  *      initio_release_scb              -       Release an SCB
 676  *      @host: InitIO host that owns the SCB
 677  *      @cmnd: SCB command block being returned
 678  *
 679  *      Return an allocated SCB to the host free list
 680  */
 681
 682 static void initio_release_scb(struct initio_host * host, struct scsi_ctrl_blk * cmnd)
 683 {
 684         unsigned long flags;
 685
 686 #if DEBUG_QUEUE
 687         printk("Release SCB %p; ", cmnd);
 688 #endif
 689         spin_lock_irqsave(&(host->avail_lock), flags);
 690         cmnd->srb = NULL;
 691         cmnd->status = 0;
 692         cmnd->next = NULL;
 693         if (host->last_avail != NULL) {
 694                 host->last_avail->next = cmnd;
 695                 host->last_avail = cmnd;
 696         } else {
 697                 host->first_avail = cmnd;
 698                 host->last_avail = cmnd;
 699         }
 700         spin_unlock_irqrestore(&(host->avail_lock), flags);
 701 }
 702
 703 /***************************************************************************/
 704 static void initio_append_pend_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
 705 {
 706
 707 #if DEBUG_QUEUE
 708         printk("Append pend SCB %p; ", scbp);
 709 #endif
 710         scbp->status = SCB_PEND;
 711         scbp->next = NULL;
 712         if (host->last_pending != NULL) {
 713                 host->last_pending->next = scbp;
 714                 host->last_pending = scbp;
 715         } else {
 716                 host->first_pending = scbp;
 717                 host->last_pending = scbp;
 718         }
 719 }
 720
 721 /***************************************************************************/
 722 static void initio_push_pend_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
 723 {
 724
 725 #if DEBUG_QUEUE
 726         printk("Push pend SCB %p; ", scbp);
 727 #endif
 728         scbp->status = SCB_PEND;
 729         if ((scbp->next = host->first_pending) != NULL) {
 730                 host->first_pending = scbp;
 731         } else {
 732                 host->first_pending = scbp;
 733                 host->last_pending = scbp;
 734         }
 735 }
 736
 737 static struct scsi_ctrl_blk *initio_find_first_pend_scb(struct initio_host * host)
 738 {
 739         struct scsi_ctrl_blk *first;
 740
 741
 742         first = host->first_pending;
 743         while (first != NULL) {
 744                 if (first->opcode != ExecSCSI)
 745                         return first;
 746                 if (first->tagmsg == 0) {
 747                         if ((host->act_tags[first->target] == 0) &&
 748                             !(host->targets[first->target].flags & TCF_BUSY))
 749                                 return first;
 750                 } else {
 751                         if ((host->act_tags[first->target] >=
 752                           host->max_tags[first->target]) |
 753                             (host->targets[first->target].flags & TCF_BUSY)) {
 754                                 first = first->next;
 755                                 continue;
 756                         }
 757                         return first;
 758                 }
 759                 first = first->next;
 760         }
 761         return first;
 762 }
 763
 764 static void initio_unlink_pend_scb(struct initio_host * host, struct scsi_ctrl_blk * scb)
 765 {
 766         struct scsi_ctrl_blk *tmp, *prev;
 767
 768 #if DEBUG_QUEUE
 769         printk("unlink pend SCB %p; ", scb);
 770 #endif
 771
 772         prev = tmp = host->first_pending;
 773         while (tmp != NULL) {
 774                 if (scb == tmp) {       /* Unlink this SCB              */
 775                         if (tmp == host->first_pending) {
 776                                 if ((host->first_pending = tmp->next) == NULL)
 777                                         host->last_pending = NULL;
 778                         } else {
 779                                 prev->next = tmp->next;
 780                                 if (tmp == host->last_pending)
 781                                         host->last_pending = prev;
 782                         }
 783                         tmp->next = NULL;
 784                         break;
 785                 }
 786                 prev = tmp;
 787                 tmp = tmp->next;
 788         }
 789 }
 790
 791 static void initio_append_busy_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
 792 {
 793
 794 #if DEBUG_QUEUE
 795         printk("append busy SCB %p; ", scbp);
 796 #endif
 797         if (scbp->tagmsg)
 798                 host->act_tags[scbp->target]++;
 799         else
 800                 host->targets[scbp->target].flags |= TCF_BUSY;
 801         scbp->status = SCB_BUSY;
 802         scbp->next = NULL;
 803         if (host->last_busy != NULL) {
 804                 host->last_busy->next = scbp;
 805                 host->last_busy = scbp;
 806         } else {
 807                 host->first_busy = scbp;
 808                 host->last_busy = scbp;
 809         }
 810 }
 811
 812 /***************************************************************************/
 813 static struct scsi_ctrl_blk *initio_pop_busy_scb(struct initio_host * host)
 814 {
 815         struct scsi_ctrl_blk *tmp;
 816
 817
 818         if ((tmp = host->first_busy) != NULL) {
 819                 if ((host->first_busy = tmp->next) == NULL)
 820                         host->last_busy = NULL;
 821                 tmp->next = NULL;
 822                 if (tmp->tagmsg)
 823                         host->act_tags[tmp->target]--;
 824                 else
 825                         host->targets[tmp->target].flags &= ~TCF_BUSY;
 826         }
 827 #if DEBUG_QUEUE
 828         printk("Pop busy SCB %p; ", tmp);
 829 #endif
 830         return tmp;
 831 }
 832
 833 /***************************************************************************/
 834 static void initio_unlink_busy_scb(struct initio_host * host, struct scsi_ctrl_blk * scb)
 835 {
 836         struct scsi_ctrl_blk *tmp, *prev;
 837
 838 #if DEBUG_QUEUE
 839         printk("unlink busy SCB %p; ", scb);
 840 #endif
 841
 842         prev = tmp = host->first_busy;
 843         while (tmp != NULL) {
 844                 if (scb == tmp) {       /* Unlink this SCB              */
 845                         if (tmp == host->first_busy) {
 846                                 if ((host->first_busy = tmp->next) == NULL)
 847                                         host->last_busy = NULL;
 848                         } else {
 849                                 prev->next = tmp->next;
 850                                 if (tmp == host->last_busy)
 851                                         host->last_busy = prev;
 852                         }
 853                         tmp->next = NULL;
 854                         if (tmp->tagmsg)
 855                                 host->act_tags[tmp->target]--;
 856                         else
 857                                 host->targets[tmp->target].flags &= ~TCF_BUSY;
 858                         break;
 859                 }
 860                 prev = tmp;
 861                 tmp = tmp->next;
 862         }
 863         return;
 864 }
 865
 866 struct scsi_ctrl_blk *initio_find_busy_scb(struct initio_host * host, u16 tarlun)
 867 {
 868         struct scsi_ctrl_blk *tmp;
 869         u16 scbp_tarlun;
 870
 871
 872         tmp = host->first_busy;
 873         while (tmp != NULL) {
 874                 scbp_tarlun = (tmp->lun << 8) | (tmp->target);
 875                 if (scbp_tarlun == tarlun) {    /* Unlink this SCB              */
 876                         break;
 877                 }
 878                 tmp = tmp->next;
 879         }
 880 #if DEBUG_QUEUE
 881         printk("find busy SCB %p; ", tmp);
 882 #endif
 883         return tmp;
 884 }
 885
 886 static void initio_append_done_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
 887 {
 888 #if DEBUG_QUEUE
 889         printk("append done SCB %p; ", scbp);
 890 #endif
 891
 892         scbp->status = SCB_DONE;
 893         scbp->next = NULL;
 894         if (host->last_done != NULL) {
 895                 host->last_done->next = scbp;
 896                 host->last_done = scbp;
 897         } else {
 898                 host->first_done = scbp;
 899                 host->last_done = scbp;
 900         }
 901 }
 902
 903 struct scsi_ctrl_blk *initio_find_done_scb(struct initio_host * host)
 904 {
 905         struct scsi_ctrl_blk *tmp;
 906
 907         if ((tmp = host->first_done) != NULL) {
 908                 if ((host->first_done = tmp->next) == NULL)
 909                         host->last_done = NULL;
 910                 tmp->next = NULL;
 911         }
 912 #if DEBUG_QUEUE
 913         printk("find done SCB %p; ",tmp);
 914 #endif
 915         return tmp;
 916 }
 917
 918 static int initio_abort_srb(struct initio_host * host, struct scsi_cmnd *srbp)
 919 {
 920         unsigned long flags;
 921         struct scsi_ctrl_blk *tmp, *prev;
 922
 923         spin_lock_irqsave(&host->semaph_lock, flags);
 924
 925         if ((host->semaph == 0) && (host->active == NULL)) {
 926                 /* disable Jasmin SCSI Int        */
 927                 outb(0x1F, host->addr + TUL_Mask);
 928                 spin_unlock_irqrestore(&host->semaph_lock, flags);
 929                 /* FIXME: synchronize_irq needed ? */
 930                 tulip_main(host);
 931                 spin_lock_irqsave(&host->semaph_lock, flags);
 932                 host->semaph = 1;
 933                 outb(0x0F, host->addr + TUL_Mask);
 934                 spin_unlock_irqrestore(&host->semaph_lock, flags);
 935                 return SCSI_ABORT_SNOOZE;
 936         }
 937         prev = tmp = host->first_pending;       /* Check Pend queue */
 938         while (tmp != NULL) {
 939                 /* 07/27/98 */
 940                 if (tmp->srb == srbp) {
 941                         if (tmp == host->active) {
 942                                 spin_unlock_irqrestore(&host->semaph_lock, flags);
 943                                 return SCSI_ABORT_BUSY;
 944                         } else if (tmp == host->first_pending) {
 945                                 if ((host->first_pending = tmp->next) == NULL)
 946                                         host->last_pending = NULL;
 947                         } else {
 948                                 prev->next = tmp->next;
 949                                 if (tmp == host->last_pending)
 950                                         host->last_pending = prev;
 951                         }
 952                         tmp->hastat = HOST_ABORTED;
 953                         tmp->flags |= SCF_DONE;
 954                         if (tmp->flags & SCF_POST)
 955                                 (*tmp->post) ((u8 *) host, (u8 *) tmp);
 956                         spin_unlock_irqrestore(&host->semaph_lock, flags);
 957                         return SCSI_ABORT_SUCCESS;
 958                 }
 959                 prev = tmp;
 960                 tmp = tmp->next;
 961         }
 962
 963         prev = tmp = host->first_busy;  /* Check Busy queue */
 964         while (tmp != NULL) {
 965                 if (tmp->srb == srbp) {
 966                         if (tmp == host->active) {
 967                                 spin_unlock_irqrestore(&host->semaph_lock, flags);
 968                                 return SCSI_ABORT_BUSY;
 969                         } else if (tmp->tagmsg == 0) {
 970                                 spin_unlock_irqrestore(&host->semaph_lock, flags);
 971                                 return SCSI_ABORT_BUSY;
 972                         } else {
 973                                 host->act_tags[tmp->target]--;
 974                                 if (tmp == host->first_busy) {
 975                                         if ((host->first_busy = tmp->next) == NULL)
 976                                                 host->last_busy = NULL;
 977                                 } else {
 978                                         prev->next = tmp->next;
 979                                         if (tmp == host->last_busy)
 980                                                 host->last_busy = prev;
 981                                 }
 982                                 tmp->next = NULL;
 983
 984
 985                                 tmp->hastat = HOST_ABORTED;
 986                                 tmp->flags |= SCF_DONE;
 987                                 if (tmp->flags & SCF_POST)
 988                                         (*tmp->post) ((u8 *) host, (u8 *) tmp);
 989                                 spin_unlock_irqrestore(&host->semaph_lock, flags);
 990                                 return SCSI_ABORT_SUCCESS;
 991                         }
 992                 }
 993                 prev = tmp;
 994                 tmp = tmp->next;
 995         }
 996         spin_unlock_irqrestore(&host->semaph_lock, flags);
 997         return SCSI_ABORT_NOT_RUNNING;
 998 }
 999
1000 /***************************************************************************/
1001 static int initio_bad_seq(struct initio_host * host)
1002 {
1003         struct scsi_ctrl_blk *scb;
1004
1005         printk("initio_bad_seg c=%d\n", host->index);
1006
1007         if ((scb = host->active) != NULL) {
1008                 initio_unlink_busy_scb(host, scb);
1009                 scb->hastat = HOST_BAD_PHAS;
1010                 scb->tastat = 0;
1011                 initio_append_done_scb(host, scb);
1012         }
1013         initio_stop_bm(host);
1014         initio_reset_scsi(host, 8);     /* 7/29/98 */
1015         return initio_post_scsi_rst(host);
1016 }
1017
1018
1019 /************************************************************************/
1020 static void initio_exec_scb(struct initio_host * host, struct scsi_ctrl_blk * scb)
1021 {
1022         unsigned long flags;
1023
1024         scb->mode = 0;
1025
1026         scb->sgidx = 0;
1027         scb->sgmax = scb->sglen;
1028
1029         spin_lock_irqsave(&host->semaph_lock, flags);
1030
1031         initio_append_pend_scb(host, scb);      /* Append this SCB to Pending queue */
1032
1033 /* VVVVV 07/21/98 */
1034         if (host->semaph == 1) {
1035                 /* Disable Jasmin SCSI Int */
1036                 outb(0x1F, host->addr + TUL_Mask);
1037                 host->semaph = 0;
1038                 spin_unlock_irqrestore(&host->semaph_lock, flags);
1039
1040                 tulip_main(host);
1041
1042                 spin_lock_irqsave(&host->semaph_lock, flags);
1043                 host->semaph = 1;
1044                 outb(0x0F, host->addr + TUL_Mask);
1045         }
1046         spin_unlock_irqrestore(&host->semaph_lock, flags);
1047         return;
1048 }
1049
1050 /***************************************************************************/
1051 static int initio_isr(struct initio_host * host)
1052 {
1053         if (inb(host->addr + TUL_Int) & TSS_INT_PENDING) {
1054                 if (host->semaph == 1) {
1055                         outb(0x1F, host->addr + TUL_Mask);
1056                         /* Disable Tulip SCSI Int */
1057                         host->semaph = 0;
1058
1059                         tulip_main(host);
1060
1061                         host->semaph = 1;
1062                         outb(0x0F, host->addr + TUL_Mask);
1063                         return 1;
1064                 }
1065         }
1066         return 0;
1067 }
1068
1069 static int tulip_main(struct initio_host * host)
1070 {
1071         struct scsi_ctrl_blk *scb;
1072
1073         for (;;) {
1074                 tulip_scsi(host);       /* Call tulip_scsi              */
1075
1076                 /* Walk the list of completed SCBs */
1077                 while ((scb = initio_find_done_scb(host)) != NULL) {    /* find done entry */
1078                         if (scb->tastat == INI_QUEUE_FULL) {
1079                                 host->max_tags[scb->target] =
1080                                     host->act_tags[scb->target] - 1;
1081                                 scb->tastat = 0;
1082                                 initio_append_pend_scb(host, scb);
1083                                 continue;
1084                         }
1085                         if (!(scb->mode & SCM_RSENS)) {         /* not in auto req. sense mode */
1086                                 if (scb->tastat == 2) {
1087
1088                                         /* clr sync. nego flag */
1089
1090                                         if (scb->flags & SCF_SENSE) {
1091                                                 u8 len;
1092                                                 len = scb->senselen;
1093                                                 if (len == 0)
1094                                                         len = 1;
1095                                                 scb->buflen = scb->senselen;
1096                                                 scb->bufptr = scb->senseptr;
1097                                                 scb->flags &= ~(SCF_SG | SCF_DIR);      /* for xfer_data_in */
1098                                                 /* so, we won't report wrong direction in xfer_data_in,
1099                                                    and won't report HOST_DO_DU in state_6 */
1100                                                 scb->mode = SCM_RSENS;
1101                                                 scb->ident &= 0xBF;     /* Disable Disconnect */
1102                                                 scb->tagmsg = 0;
1103                                                 scb->tastat = 0;
1104                                                 scb->cdblen = 6;
1105                                                 scb->cdb[0] = SCSICMD_RequestSense;
1106                                                 scb->cdb[1] = 0;
1107                                                 scb->cdb[2] = 0;
1108                                                 scb->cdb[3] = 0;
1109                                                 scb->cdb[4] = len;
1110                                                 scb->cdb[5] = 0;
1111                                                 initio_push_pend_scb(host, scb);
1112                                                 break;
1113                                         }
1114                                 }
1115                         } else {        /* in request sense mode */
1116
1117                                 if (scb->tastat == 2) {         /* check contition status again after sending
1118                                                                            requset sense cmd 0x3 */
1119                                         scb->hastat = HOST_BAD_PHAS;
1120                                 }
1121                                 scb->tastat = 2;
1122                         }
1123                         scb->flags |= SCF_DONE;
1124                         if (scb->flags & SCF_POST) {
1125                                 /* FIXME: only one post method and lose casts */
1126                                 (*scb->post) ((u8 *) host, (u8 *) scb);
1127                         }
1128                 }               /* while */
1129                 /* find_active: */
1130                 if (inb(host->addr + TUL_SStatus0) & TSS_INT_PENDING)
1131                         continue;
1132                 if (host->active)       /* return to OS and wait for xfer_done_ISR/Selected_ISR */
1133                         return 1;       /* return to OS, enable interrupt */
1134                 /* Check pending SCB            */
1135                 if (initio_find_first_pend_scb(host) == NULL)
1136                         return 1;       /* return to OS, enable interrupt */
1137         }                       /* End of for loop */
1138         /* statement won't reach here */
1139 }
1140
1141 static void tulip_scsi(struct initio_host * host)
1142 {
1143         struct scsi_ctrl_blk *scb;
1144         struct target_control *active_tc;
1145
1146         /* make sure to service interrupt asap */
1147         if ((host->jsstatus0 = inb(host->addr + TUL_SStatus0)) & TSS_INT_PENDING) {
1148                 host->phase = host->jsstatus0 & TSS_PH_MASK;
1149                 host->jsstatus1 = inb(host->addr + TUL_SStatus1);
1150                 host->jsint = inb(host->addr + TUL_SInt);
1151                 if (host->jsint & TSS_SCSIRST_INT) {    /* SCSI bus reset detected      */
1152                         int_initio_scsi_rst(host);
1153                         return;
1154                 }
1155                 if (host->jsint & TSS_RESEL_INT) {      /* if selected/reselected interrupt */
1156                         if (int_initio_resel(host) == 0)
1157                                 initio_next_state(host);
1158                         return;
1159                 }
1160                 if (host->jsint & TSS_SEL_TIMEOUT) {
1161                         int_initio_busfree(host);
1162                         return;
1163                 }
1164                 if (host->jsint & TSS_DISC_INT) {       /* BUS disconnection            */
1165                         int_initio_busfree(host);       /* unexpected bus free or sel timeout */
1166                         return;
1167                 }
1168                 if (host->jsint & (TSS_FUNC_COMP | TSS_BUS_SERV)) {     /* func complete or Bus service */
1169                         if ((scb = host->active) != NULL)
1170                                 initio_next_state(host);
1171                         return;
1172                 }
1173         }
1174         if (host->active != NULL)
1175                 return;
1176
1177         if ((scb = initio_find_first_pend_scb(host)) == NULL)
1178                 return;
1179
1180         /* program HBA's SCSI ID & target SCSI ID */
1181         outb((host->scsi_id << 4) | (scb->target & 0x0F),
1182                 host->addr + TUL_SScsiId);
1183         if (scb->opcode == ExecSCSI) {
1184                 active_tc = &host->targets[scb->target];
1185
1186                 if (scb->tagmsg)
1187                         active_tc->drv_flags |= TCF_DRV_EN_TAG;
1188                 else
1189                         active_tc->drv_flags &= ~TCF_DRV_EN_TAG;
1190
1191                 outb(active_tc->js_period, host->addr + TUL_SPeriod);
1192                 if ((active_tc->flags & (TCF_WDTR_DONE | TCF_NO_WDTR)) == 0) {  /* do wdtr negotiation          */
1193                         initio_select_atn_stop(host, scb);
1194                 } else {
1195                         if ((active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0) {     /* do sync negotiation          */
1196                                 initio_select_atn_stop(host, scb);
1197                         } else {
1198                                 if (scb->tagmsg)
1199                                         initio_select_atn3(host, scb);
1200                                 else
1201                                         initio_select_atn(host, scb);
1202                         }
1203                 }
1204                 if (scb->flags & SCF_POLL) {
1205                         while (wait_tulip(host) != -1) {
1206                                 if (initio_next_state(host) == -1)
1207                                         break;
1208                         }
1209                 }
1210         } else if (scb->opcode == BusDevRst) {
1211                 initio_select_atn_stop(host, scb);
1212                 scb->next_state = 8;
1213                 if (scb->flags & SCF_POLL) {
1214                         while (wait_tulip(host) != -1) {
1215                                 if (initio_next_state(host) == -1)
1216                                         break;
1217                         }
1218                 }
1219         } else if (scb->opcode == AbortCmd) {
1220                 if (initio_abort_srb(host, scb->srb) != 0) {
1221                         initio_unlink_pend_scb(host, scb);
1222                         initio_release_scb(host, scb);
1223                 } else {
1224                         scb->opcode = BusDevRst;
1225                         initio_select_atn_stop(host, scb);
1226                         scb->next_state = 8;
1227                 }
1228         } else {
1229                 initio_unlink_pend_scb(host, scb);
1230                 scb->hastat = 0x16;     /* bad command */
1231                 initio_append_done_scb(host, scb);
1232         }
1233         return;
1234 }
1235
1236 /**
1237  *      initio_next_state               -       Next SCSI state
1238  *      @host: InitIO host we are processing
1239  *
1240  *      Progress the active command block along the state machine
1241  *      until we hit a state which we must wait for activity to occur.
1242  *
1243  *      Returns zero or a negative code.
1244  */
1245
1246 static int initio_next_state(struct initio_host * host)
1247 {
1248         int next;
1249
1250         next = host->active->next_state;
1251         for (;;) {
1252                 switch (next) {
1253                 case 1:
1254                         next = initio_state_1(host);
1255                         break;
1256                 case 2:
1257                         next = initio_state_2(host);
1258                         break;
1259                 case 3:
1260                         next = initio_state_3(host);
1261                         break;
1262                 case 4:
1263                         next = initio_state_4(host);
1264                         break;
1265                 case 5:
1266                         next = initio_state_5(host);
1267                         break;
1268                 case 6:
1269                         next = initio_state_6(host);
1270                         break;
1271                 case 7:
1272                         next = initio_state_7(host);
1273                         break;
1274                 case 8:
1275                         return initio_bus_device_reset(host);
1276                 default:
1277                         return initio_bad_seq(host);
1278                 }
1279                 if (next <= 0)
1280                         return next;
1281         }
1282 }
1283
1284
1285 /**
1286  *      initio_state_1          -       SCSI state machine
1287  *      @host: InitIO host we are controlling
1288  *
1289  *      Perform SCSI state processing for Select/Attention/Stop
1290  */
1291
1292 static int initio_state_1(struct initio_host * host)
1293 {
1294         struct scsi_ctrl_blk *scb = host->active;
1295         struct target_control *active_tc = host->active_tc;
1296 #if DEBUG_STATE
1297         printk("-s1-");
1298 #endif
1299
1300         /* Move the SCB from pending to busy */
1301         initio_unlink_pend_scb(host, scb);
1302         initio_append_busy_scb(host, scb);
1303
1304         outb(active_tc->sconfig0, host->addr + TUL_SConfig );
1305         /* ATN on */
1306         if (host->phase == MSG_OUT) {
1307                 outb(TSC_EN_BUS_IN | TSC_HW_RESELECT, host->addr + TUL_SCtrl1);
1308                 outb(scb->ident, host->addr + TUL_SFifo);
1309
1310                 if (scb->tagmsg) {
1311                         outb(scb->tagmsg, host->addr + TUL_SFifo);
1312                         outb(scb->tagid, host->addr + TUL_SFifo);
1313                 }
1314                 if ((active_tc->flags & (TCF_WDTR_DONE | TCF_NO_WDTR)) == 0) {
1315                         active_tc->flags |= TCF_WDTR_DONE;
1316                         outb(EXTENDED_MESSAGE, host->addr + TUL_SFifo);
1317                         outb(2, host->addr + TUL_SFifo);        /* Extended msg length */
1318                         outb(EXTENDED_SDTR, host->addr + TUL_SFifo);    /* Sync request */
1319                         outb(1, host->addr + TUL_SFifo);        /* Start from 16 bits */
1320                 } else if ((active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0) {
1321                         active_tc->flags |= TCF_SYNC_DONE;
1322                         outb(EXTENDED_MESSAGE, host->addr + TUL_SFifo);
1323                         outb(3, host->addr + TUL_SFifo);        /* extended msg length */
1324                         outb(EXTENDED_SDTR, host->addr + TUL_SFifo);    /* sync request */
1325                         outb(initio_rate_tbl[active_tc->flags & TCF_SCSI_RATE], host->addr + TUL_SFifo);
1326                         outb(MAX_OFFSET, host->addr + TUL_SFifo);       /* REQ/ACK offset */
1327                 }
1328                 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1329                 if (wait_tulip(host) == -1)
1330                         return -1;
1331         }
1332         outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1333         outb((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)), host->addr + TUL_SSignal);
1334         /* Into before CDB xfer */
1335         return 3;
1336 }
1337
1338
1339 /**
1340  *      initio_state_2          -       SCSI state machine
1341  *      @host: InitIO host we are controlling
1342  *
1343  * state after selection with attention
1344  * state after selection with attention3
1345  */
1346
1347 static int initio_state_2(struct initio_host * host)
1348 {
1349         struct scsi_ctrl_blk *scb = host->active;
1350         struct target_control *active_tc = host->active_tc;
1351 #if DEBUG_STATE
1352         printk("-s2-");
1353 #endif
1354
1355         initio_unlink_pend_scb(host, scb);
1356         initio_append_busy_scb(host, scb);
1357
1358         outb(active_tc->sconfig0, host->addr + TUL_SConfig);
1359
1360         if (host->jsstatus1 & TSS_CMD_PH_CMP)
1361                 return 4;
1362
1363         outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1364         outb((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)), host->addr + TUL_SSignal);
1365         /* Into before CDB xfer */
1366         return 3;
1367 }
1368
1369 /**
1370  *      initio_state_3          -       SCSI state machine
1371  *      @host: InitIO host we are controlling
1372  *
1373  * state before CDB xfer is done
1374  */
1375
1376 static int initio_state_3(struct initio_host * host)
1377 {
1378         struct scsi_ctrl_blk *scb = host->active;
1379         struct target_control *active_tc = host->active_tc;
1380         int i;
1381
1382 #if DEBUG_STATE
1383         printk("-s3-");
1384 #endif
1385         for (;;) {
1386                 switch (host->phase) {
1387                 case CMD_OUT:   /* Command out phase            */
1388                         for (i = 0; i < (int) scb->cdblen; i++)
1389                                 outb(scb->cdb[i], host->addr + TUL_SFifo);
1390                         outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1391                         if (wait_tulip(host) == -1)
1392                                 return -1;
1393                         if (host->phase == CMD_OUT)
1394                                 return initio_bad_seq(host);
1395                         return 4;
1396
1397                 case MSG_IN:    /* Message in phase             */
1398                         scb->next_state = 3;
1399                         if (initio_msgin(host) == -1)
1400                                 return -1;
1401                         break;
1402
1403                 case STATUS_IN: /* Status phase                 */
1404                         if (initio_status_msg(host) == -1)
1405                                 return -1;
1406                         break;
1407
1408                 case MSG_OUT:   /* Message out phase            */
1409                         if (active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) {
1410                                 outb(NOP, host->addr + TUL_SFifo);              /* msg nop */
1411                                 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1412                                 if (wait_tulip(host) == -1)
1413                                         return -1;
1414                         } else {
1415                                 active_tc->flags |= TCF_SYNC_DONE;
1416
1417                                 outb(EXTENDED_MESSAGE, host->addr + TUL_SFifo);
1418                                 outb(3, host->addr + TUL_SFifo);        /* ext. msg len */
1419                                 outb(EXTENDED_SDTR, host->addr + TUL_SFifo);    /* sync request */
1420                                 outb(initio_rate_tbl[active_tc->flags & TCF_SCSI_RATE], host->addr + TUL_SFifo);
1421                                 outb(MAX_OFFSET, host->addr + TUL_SFifo);       /* REQ/ACK offset */
1422                                 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1423                                 if (wait_tulip(host) == -1)
1424                                         return -1;
1425                                 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1426                                 outb(inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7), host->addr + TUL_SSignal);
1427
1428                         }
1429                         break;
1430                 default:
1431                         return initio_bad_seq(host);
1432                 }
1433         }
1434 }
1435
1436 /**
1437  *      initio_state_4          -       SCSI state machine
1438  *      @host: InitIO host we are controlling
1439  *
1440  *      SCSI state machine. State 4
1441  */
1442
1443 static int initio_state_4(struct initio_host * host)
1444 {
1445         struct scsi_ctrl_blk *scb = host->active;
1446
1447 #if DEBUG_STATE
1448         printk("-s4-");
1449 #endif
1450         if ((scb->flags & SCF_DIR) == SCF_NO_XF) {
1451                 return 6;       /* Go to state 6 (After data) */
1452         }
1453         for (;;) {
1454                 if (scb->buflen == 0)
1455                         return 6;
1456
1457                 switch (host->phase) {
1458
1459                 case STATUS_IN: /* Status phase                 */
1460                         if ((scb->flags & SCF_DIR) != 0)        /* if direction bit set then report data underrun */
1461                                 scb->hastat = HOST_DO_DU;
1462                         if ((initio_status_msg(host)) == -1)
1463                                 return -1;
1464                         break;
1465
1466                 case MSG_IN:    /* Message in phase             */
1467                         scb->next_state = 0x4;
1468                         if (initio_msgin(host) == -1)
1469                                 return -1;
1470                         break;
1471
1472                 case MSG_OUT:   /* Message out phase            */
1473                         if (host->jsstatus0 & TSS_PAR_ERROR) {
1474                                 scb->buflen = 0;
1475                                 scb->hastat = HOST_DO_DU;
1476                                 if (initio_msgout_ide(host) == -1)
1477                                         return -1;
1478                                 return 6;
1479                         } else {
1480                                 outb(NOP, host->addr + TUL_SFifo);              /* msg nop */
1481                                 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1482                                 if (wait_tulip(host) == -1)
1483                                         return -1;
1484                         }
1485                         break;
1486
1487                 case DATA_IN:   /* Data in phase                */
1488                         return initio_xfer_data_in(host);
1489
1490                 case DATA_OUT:  /* Data out phase               */
1491                         return initio_xfer_data_out(host);
1492
1493                 default:
1494                         return initio_bad_seq(host);
1495                 }
1496         }
1497 }
1498
1499
1500 /**
1501  *      initio_state_5          -       SCSI state machine
1502  *      @host: InitIO host we are controlling
1503  *
1504  *      State after dma xfer done or phase change before xfer done
1505  */
1506
1507 static int initio_state_5(struct initio_host * host)
1508 {
1509         struct scsi_ctrl_blk *scb = host->active;
1510         long cnt, xcnt;         /* cannot use unsigned !! code: if (xcnt < 0) */
1511
1512 #if DEBUG_STATE
1513         printk("-s5-");
1514 #endif
1515         /*------ get remaining count -------*/
1516         cnt = inl(host->addr + TUL_SCnt0) & 0x0FFFFFF;
1517
1518         if (inb(host->addr + TUL_XCmd) & 0x20) {
1519                 /* ----------------------- DATA_IN ----------------------------- */
1520                 /* check scsi parity error */
1521                 if (host->jsstatus0 & TSS_PAR_ERROR)
1522                         scb->hastat = HOST_DO_DU;
1523                 if (inb(host->addr + TUL_XStatus) & XPEND) {    /* DMA xfer pending, Send STOP  */
1524                         /* tell Hardware  scsi xfer has been terminated */
1525                         outb(inb(host->addr + TUL_XCtrl) | 0x80, host->addr + TUL_XCtrl);
1526                         /* wait until DMA xfer not pending */
1527                         while (inb(host->addr + TUL_XStatus) & XPEND)
1528                                 cpu_relax();
1529                 }
1530         } else {
1531                 /*-------- DATA OUT -----------*/
1532                 if ((inb(host->addr + TUL_SStatus1) & TSS_XFER_CMP) == 0) {
1533                         if (host->active_tc->js_period & TSC_WIDE_SCSI)
1534                                 cnt += (inb(host->addr + TUL_SFifoCnt) & 0x1F) << 1;
1535                         else
1536                                 cnt += (inb(host->addr + TUL_SFifoCnt) & 0x1F);
1537                 }
1538                 if (inb(host->addr + TUL_XStatus) & XPEND) {    /* if DMA xfer is pending, abort DMA xfer */
1539                         outb(TAX_X_ABT, host->addr + TUL_XCmd);
1540                         /* wait Abort DMA xfer done */
1541                         while ((inb(host->addr + TUL_Int) & XABT) == 0)
1542                                 cpu_relax();
1543                 }
1544                 if ((cnt == 1) && (host->phase == DATA_OUT)) {
1545                         outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1546                         if (wait_tulip(host) == -1)
1547                                 return -1;
1548                         cnt = 0;
1549                 } else {
1550                         if ((inb(host->addr + TUL_SStatus1) & TSS_XFER_CMP) == 0)
1551                                 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1552                 }
1553         }
1554         if (cnt == 0) {
1555                 scb->buflen = 0;
1556                 return 6;       /* After Data */
1557         }
1558         /* Update active data pointer */
1559         xcnt = (long) scb->buflen - cnt;        /* xcnt== bytes already xferred */
1560         scb->buflen = (u32) cnt;                /* cnt == bytes left to be xferred */
1561         if (scb->flags & SCF_SG) {
1562                 struct sg_entry *sgp;
1563                 unsigned long i;
1564
1565                 sgp = &scb->sglist[scb->sgidx];
1566                 for (i = scb->sgidx; i < scb->sgmax; sgp++, i++) {
1567                         xcnt -= (long) sgp->len;
1568                         if (xcnt < 0) {         /* this sgp xfer half done */
1569                                 xcnt += (long) sgp->len;        /* xcnt == bytes xferred in this sgp */
1570                                 sgp->data += (u32) xcnt;        /* new ptr to be xfer */
1571                                 sgp->len -= (u32) xcnt; /* new len to be xfer */
1572                                 scb->bufptr += ((u32) (i - scb->sgidx) << 3);
1573                                 /* new SG table ptr */
1574                                 scb->sglen = (u8) (scb->sgmax - i);
1575                                 /* new SG table len */
1576                                 scb->sgidx = (u16) i;
1577                                 /* for next disc and come in this loop */
1578                                 return 4;       /* Go to state 4                */
1579                         }
1580                         /* else (xcnt >= 0 , i.e. this sgp already xferred */
1581                 }               /* for */
1582                 return 6;       /* Go to state 6                */
1583         } else {
1584                 scb->bufptr += (u32) xcnt;
1585         }
1586         return 4;               /* Go to state 4                */
1587 }
1588
1589 /**
1590  *      initio_state_6          -       SCSI state machine
1591  *      @host: InitIO host we are controlling
1592  *
1593  *      State after Data phase
1594  */
1595
1596 static int initio_state_6(struct initio_host * host)
1597 {
1598         struct scsi_ctrl_blk *scb = host->active;
1599
1600 #if DEBUG_STATE
1601         printk("-s6-");
1602 #endif
1603         for (;;) {
1604                 switch (host->phase) {
1605                 case STATUS_IN: /* Status phase                 */
1606                         if ((initio_status_msg(host)) == -1)
1607                                 return -1;
1608                         break;
1609
1610                 case MSG_IN:    /* Message in phase             */
1611                         scb->next_state = 6;
1612                         if ((initio_msgin(host)) == -1)
1613                                 return -1;
1614                         break;
1615
1616                 case MSG_OUT:   /* Message out phase            */
1617                         outb(NOP, host->addr + TUL_SFifo);              /* msg nop */
1618                         outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1619                         if (wait_tulip(host) == -1)
1620                                 return -1;
1621                         break;
1622
1623                 case DATA_IN:   /* Data in phase                */
1624                         return initio_xpad_in(host);
1625
1626                 case DATA_OUT:  /* Data out phase               */
1627                         return initio_xpad_out(host);
1628
1629                 default:
1630                         return initio_bad_seq(host);
1631                 }
1632         }
1633 }
1634
1635 /**
1636  *      initio_state_7          -       SCSI state machine
1637  *      @host: InitIO host we are controlling
1638  *
1639  */
1640
1641 static int initio_state_7(struct initio_host * host)
1642 {
1643         int cnt, i;
1644
1645 #if DEBUG_STATE
1646         printk("-s7-");
1647 #endif
1648         /* flush SCSI FIFO */
1649         cnt = inb(host->addr + TUL_SFifoCnt) & 0x1F;
1650         if (cnt) {
1651                 for (i = 0; i < cnt; i++)
1652                         inb(host->addr + TUL_SFifo);
1653         }
1654         switch (host->phase) {
1655         case DATA_IN:           /* Data in phase                */
1656         case DATA_OUT:          /* Data out phase               */
1657                 return initio_bad_seq(host);
1658         default:
1659                 return 6;       /* Go to state 6                */
1660         }
1661 }
1662
1663 /**
1664  *      initio_xfer_data_in     -       Commence data input
1665  *      @host: InitIO host in use
1666  *
1667  *      Commence a block of data transfer. The transfer itself will
1668  *      be managed by the controller and we will get a completion (or
1669  *      failure) interrupt.
1670  */
1671 static int initio_xfer_data_in(struct initio_host * host)
1672 {
1673         struct scsi_ctrl_blk *scb = host->active;
1674
1675         if ((scb->flags & SCF_DIR) == SCF_DOUT)
1676                 return 6;       /* wrong direction */
1677
1678         outl(scb->buflen, host->addr + TUL_SCnt0);
1679         outb(TSC_XF_DMA_IN, host->addr + TUL_SCmd);     /* 7/25/95 */
1680
1681         if (scb->flags & SCF_SG) {      /* S/G xfer */
1682                 outl(((u32) scb->sglen) << 3, host->addr + TUL_XCntH);
1683                 outl(scb->bufptr, host->addr + TUL_XAddH);
1684                 outb(TAX_SG_IN, host->addr + TUL_XCmd);
1685         } else {
1686                 outl(scb->buflen, host->addr + TUL_XCntH);
1687                 outl(scb->bufptr, host->addr + TUL_XAddH);
1688                 outb(TAX_X_IN, host->addr + TUL_XCmd);
1689         }
1690         scb->next_state = 0x5;
1691         return 0;               /* return to OS, wait xfer done , let jas_isr come in */
1692 }
1693
1694 /**
1695  *      initio_xfer_data_out    -       Commence data output
1696  *      @host: InitIO host in use
1697  *
1698  *      Commence a block of data transfer. The transfer itself will
1699  *      be managed by the controller and we will get a completion (or
1700  *      failure) interrupt.
1701  */
1702
1703 static int initio_xfer_data_out(struct initio_host * host)
1704 {
1705         struct scsi_ctrl_blk *scb = host->active;
1706
1707         if ((scb->flags & SCF_DIR) == SCF_DIN)
1708                 return 6;       /* wrong direction */
1709
1710         outl(scb->buflen, host->addr + TUL_SCnt0);
1711         outb(TSC_XF_DMA_OUT, host->addr + TUL_SCmd);
1712
1713         if (scb->flags & SCF_SG) {      /* S/G xfer */
1714                 outl(((u32) scb->sglen) << 3, host->addr + TUL_XCntH);
1715                 outl(scb->bufptr, host->addr + TUL_XAddH);
1716                 outb(TAX_SG_OUT, host->addr + TUL_XCmd);
1717         } else {
1718                 outl(scb->buflen, host->addr + TUL_XCntH);
1719                 outl(scb->bufptr, host->addr + TUL_XAddH);
1720                 outb(TAX_X_OUT, host->addr + TUL_XCmd);
1721         }
1722
1723         scb->next_state = 0x5;
1724         return 0;               /* return to OS, wait xfer done , let jas_isr come in */
1725 }
1726
1727 int initio_xpad_in(struct initio_host * host)
1728 {
1729         struct scsi_ctrl_blk *scb = host->active;
1730         struct target_control *active_tc = host->active_tc;
1731
1732         if ((scb->flags & SCF_DIR) != SCF_NO_DCHK)
1733                 scb->hastat = HOST_DO_DU;       /* over run             */
1734         for (;;) {
1735                 if (active_tc->js_period & TSC_WIDE_SCSI)
1736                         outl(2, host->addr + TUL_SCnt0);
1737                 else
1738                         outl(1, host->addr + TUL_SCnt0);
1739
1740                 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
1741                 if (wait_tulip(host) == -1)
1742                         return -1;
1743                 if (host->phase != DATA_IN) {
1744                         outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1745                         return 6;
1746                 }
1747                 inb(host->addr + TUL_SFifo);
1748         }
1749 }
1750
1751 int initio_xpad_out(struct initio_host * host)
1752 {
1753         struct scsi_ctrl_blk *scb = host->active;
1754         struct target_control *active_tc = host->active_tc;
1755
1756         if ((scb->flags & SCF_DIR) != SCF_NO_DCHK)
1757                 scb->hastat = HOST_DO_DU;       /* over run             */
1758         for (;;) {
1759                 if (active_tc->js_period & TSC_WIDE_SCSI)
1760                         outl(2, host->addr + TUL_SCnt0);
1761                 else
1762                         outl(1, host->addr + TUL_SCnt0);
1763
1764                 outb(0, host->addr + TUL_SFifo);
1765                 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1766                 if ((wait_tulip(host)) == -1)
1767                         return -1;
1768                 if (host->phase != DATA_OUT) {  /* Disable wide CPU to allow read 16 bits */
1769                         outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1);
1770                         outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1771                         return 6;
1772                 }
1773         }
1774 }
1775
1776 int initio_status_msg(struct initio_host * host)
1777 {                               /* status & MSG_IN */
1778         struct scsi_ctrl_blk *scb = host->active;
1779         u8 msg;
1780
1781         outb(TSC_CMD_COMP, host->addr + TUL_SCmd);
1782         if (wait_tulip(host) == -1)
1783                 return -1;
1784
1785         /* get status */
1786         scb->tastat = inb(host->addr + TUL_SFifo);
1787
1788         if (host->phase == MSG_OUT) {
1789                 if (host->jsstatus0 & TSS_PAR_ERROR)
1790                         outb(MSG_PARITY_ERROR, host->addr + TUL_SFifo);
1791                 else
1792                         outb(NOP, host->addr + TUL_SFifo);
1793                 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1794                 return wait_tulip(host);
1795         }
1796         if (host->phase == MSG_IN) {
1797                 msg = inb(host->addr + TUL_SFifo);
1798                 if (host->jsstatus0 & TSS_PAR_ERROR) {  /* Parity error                 */
1799                         if ((initio_msgin_accept(host)) == -1)
1800                                 return -1;
1801                         if (host->phase != MSG_OUT)
1802                                 return initio_bad_seq(host);
1803                         outb(MSG_PARITY_ERROR, host->addr + TUL_SFifo);
1804                         outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1805                         return wait_tulip(host);
1806                 }
1807                 if (msg == 0) { /* Command complete             */
1808
1809                         if ((scb->tastat & 0x18) == 0x10)       /* No link support              */
1810                                 return initio_bad_seq(host);
1811                         outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1812                         outb(TSC_MSG_ACCEPT, host->addr + TUL_SCmd);
1813                         return initio_wait_done_disc(host);
1814
1815                 }
1816                 if (msg == LINKED_CMD_COMPLETE ||
1817                     msg == LINKED_FLG_CMD_COMPLETE) {
1818                         if ((scb->tastat & 0x18) == 0x10)
1819                                 return initio_msgin_accept(host);
1820                 }
1821         }
1822         return initio_bad_seq(host);
1823 }
1824
1825
1826 /* scsi bus free */
1827 int int_initio_busfree(struct initio_host * host)
1828 {
1829         struct scsi_ctrl_blk *scb = host->active;
1830
1831         if (scb != NULL) {
1832                 if (scb->status & SCB_SELECT) {         /* selection timeout */
1833                         initio_unlink_pend_scb(host, scb);
1834                         scb->hastat = HOST_SEL_TOUT;
1835                         initio_append_done_scb(host, scb);
1836                 } else {        /* Unexpected bus free          */
1837                         initio_unlink_busy_scb(host, scb);
1838                         scb->hastat = HOST_BUS_FREE;
1839                         initio_append_done_scb(host, scb);
1840                 }
1841                 host->active = NULL;
1842                 host->active_tc = NULL;
1843         }
1844         outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);          /* Flush SCSI FIFO  */
1845         outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
1846         outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect       */
1847         return -1;
1848 }
1849
1850
1851 /**
1852  *      int_initio_scsi_rst     -       SCSI reset occurred
1853  *      @host: Host seeing the reset
1854  *
1855  *      A SCSI bus reset has occurred. Clean up any pending transfer
1856  *      the hardware is doing by DMA and then abort all active and
1857  *      disconnected commands. The mid layer should sort the rest out
1858  *      for us
1859  */
1860
1861 static int int_initio_scsi_rst(struct initio_host * host)
1862 {
1863         struct scsi_ctrl_blk *scb;
1864         int i;
1865
1866         /* if DMA xfer is pending, abort DMA xfer */
1867         if (inb(host->addr + TUL_XStatus) & 0x01) {
1868                 outb(TAX_X_ABT | TAX_X_CLR_FIFO, host->addr + TUL_XCmd);
1869                 /* wait Abort DMA xfer done */
1870                 while ((inb(host->addr + TUL_Int) & 0x04) == 0)
1871                         cpu_relax();
1872                 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1873         }
1874         /* Abort all active & disconnected scb */
1875         while ((scb = initio_pop_busy_scb(host)) != NULL) {
1876                 scb->hastat = HOST_BAD_PHAS;
1877                 initio_append_done_scb(host, scb);
1878         }
1879         host->active = NULL;
1880         host->active_tc = NULL;
1881
1882         /* clr sync nego. done flag */
1883         for (i = 0; i < host->max_tar; i++)
1884                 host->targets[i].flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
1885         return -1;
1886 }
1887
1888 /**
1889  *      int_initio_resel        -       Reselection occurred
1890  *      @host: InitIO host adapter
1891  *
1892  *      A SCSI reselection event has been signalled and the interrupt
1893  *      is now being processed. Work out which command block needs attention
1894  *      and continue processing that command.
1895  */
1896
1897 int int_initio_resel(struct initio_host * host)
1898 {
1899         struct scsi_ctrl_blk *scb;
1900         struct target_control *active_tc;
1901         u8 tag, msg = 0;
1902         u8 tar, lun;
1903
1904         if ((scb = host->active) != NULL) {
1905                 /* FIXME: Why check and not just clear ? */
1906                 if (scb->status & SCB_SELECT)           /* if waiting for selection complete */
1907                         scb->status &= ~SCB_SELECT;
1908                 host->active = NULL;
1909         }
1910         /* --------- get target id---------------------- */
1911         tar = inb(host->addr + TUL_SBusId);
1912         /* ------ get LUN from Identify message----------- */
1913         lun = inb(host->addr + TUL_SIdent) & 0x0F;
1914         /* 07/22/98 from 0x1F -> 0x0F */
1915         active_tc = &host->targets[tar];
1916         host->active_tc = active_tc;
1917         outb(active_tc->sconfig0, host->addr + TUL_SConfig);
1918         outb(active_tc->js_period, host->addr + TUL_SPeriod);
1919
1920         /* ------------- tag queueing ? ------------------- */
1921         if (active_tc->drv_flags & TCF_DRV_EN_TAG) {
1922                 if ((initio_msgin_accept(host)) == -1)
1923                         return -1;
1924                 if (host->phase != MSG_IN)
1925                         goto no_tag;
1926                 outl(1, host->addr + TUL_SCnt0);
1927                 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
1928                 if (wait_tulip(host) == -1)
1929                         return -1;
1930                 msg = inb(host->addr + TUL_SFifo);      /* Read Tag Message    */
1931
1932                 if (msg < SIMPLE_QUEUE_TAG || msg > ORDERED_QUEUE_TAG)
1933                         /* Is simple Tag      */
1934                         goto no_tag;
1935
1936                 if (initio_msgin_accept(host) == -1)
1937                         return -1;
1938
1939                 if (host->phase != MSG_IN)
1940                         goto no_tag;
1941
1942                 outl(1, host->addr + TUL_SCnt0);
1943                 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
1944                 if (wait_tulip(host) == -1)
1945                         return -1;
1946                 tag = inb(host->addr + TUL_SFifo);      /* Read Tag ID       */
1947                 scb = host->scb + tag;
1948                 if (scb->target != tar || scb->lun != lun) {
1949                         return initio_msgout_abort_tag(host);
1950                 }
1951                 if (scb->status != SCB_BUSY) {  /* 03/24/95             */
1952                         return initio_msgout_abort_tag(host);
1953                 }
1954                 host->active = scb;
1955                 if ((initio_msgin_accept(host)) == -1)
1956                         return -1;
1957         } else {                /* No tag               */
1958               no_tag:
1959                 if ((scb = initio_find_busy_scb(host, tar | (lun << 8))) == NULL) {
1960                         return initio_msgout_abort_targ(host);
1961                 }
1962                 host->active = scb;
1963                 if (!(active_tc->drv_flags & TCF_DRV_EN_TAG)) {
1964                         if ((initio_msgin_accept(host)) == -1)
1965                                 return -1;
1966                 }
1967         }
1968         return 0;
1969 }
1970
1971 /**
1972  *      int_initio_bad_seq              -       out of phase
1973  *      @host: InitIO host flagging event
1974  *
1975  *      We have ended up out of phase somehow. Reset the host controller
1976  *      and throw all our toys out of the pram. Let the midlayer clean up
1977  */
1978
1979 static int int_initio_bad_seq(struct initio_host * host)
1980 {                               /* target wrong phase           */
1981         struct scsi_ctrl_blk *scb;
1982         int i;
1983
1984         initio_reset_scsi(host, 10);
1985
1986         while ((scb = initio_pop_busy_scb(host)) != NULL) {
1987                 scb->hastat = HOST_BAD_PHAS;
1988                 initio_append_done_scb(host, scb);
1989         }
1990         for (i = 0; i < host->max_tar; i++)
1991                 host->targets[i].flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
1992         return -1;
1993 }
1994
1995
1996 /**
1997  *      initio_msgout_abort_targ                -       abort a tag
1998  *      @host: InitIO host
1999  *
2000  *      Abort when the target/lun does not match or when our SCB is not
2001  *      busy. Used by untagged commands.
2002  */
2003
2004 static int initio_msgout_abort_targ(struct initio_host * host)
2005 {
2006
2007         outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
2008         if (initio_msgin_accept(host) == -1)
2009                 return -1;
2010         if (host->phase != MSG_OUT)
2011                 return initio_bad_seq(host);
2012
2013         outb(ABORT_TASK_SET, host->addr + TUL_SFifo);
2014         outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2015
2016         return initio_wait_disc(host);
2017 }
2018
2019 /**
2020  *      initio_msgout_abort_tag         -       abort a tag
2021  *      @host: InitIO host
2022  *
2023  *      Abort when the target/lun does not match or when our SCB is not
2024  *      busy. Used for tagged commands.
2025  */
2026
2027 static int initio_msgout_abort_tag(struct initio_host * host)
2028 {
2029
2030         outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
2031         if (initio_msgin_accept(host) == -1)
2032                 return -1;
2033         if (host->phase != MSG_OUT)
2034                 return initio_bad_seq(host);
2035
2036         outb(ABORT_TASK, host->addr + TUL_SFifo);
2037         outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2038
2039         return initio_wait_disc(host);
2040
2041 }
2042
2043 /**
2044  *      initio_msgin            -       Message in
2045  *      @host: InitIO Host
2046  *
2047  *      Process incoming message
2048  */
2049 static int initio_msgin(struct initio_host * host)
2050 {
2051         struct target_control *active_tc;
2052
2053         for (;;) {
2054                 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
2055
2056                 outl(1, host->addr + TUL_SCnt0);
2057                 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
2058                 if (wait_tulip(host) == -1)
2059                         return -1;
2060
2061                 switch (inb(host->addr + TUL_SFifo)) {
2062                 case DISCONNECT:        /* Disconnect msg */
2063                         outb(TSC_MSG_ACCEPT, host->addr + TUL_SCmd);
2064                         return initio_wait_disc(host);
2065                 case SAVE_POINTERS:
2066                 case RESTORE_POINTERS:
2067                 case NOP:
2068                         initio_msgin_accept(host);
2069                         break;
2070                 case MESSAGE_REJECT:    /* Clear ATN first              */
2071                         outb((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)),
2072                                 host->addr + TUL_SSignal);
2073                         active_tc = host->active_tc;
2074                         if ((active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0)       /* do sync nego */
2075                                 outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN),
2076                                         host->addr + TUL_SSignal);
2077                         initio_msgin_accept(host);
2078                         break;
2079                 case EXTENDED_MESSAGE:  /* extended msg */
2080                         initio_msgin_extend(host);
2081                         break;
2082                 case IGNORE_WIDE_RESIDUE:
2083                         initio_msgin_accept(host);
2084                         break;
2085                 case COMMAND_COMPLETE:
2086                         outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
2087                         outb(TSC_MSG_ACCEPT, host->addr + TUL_SCmd);
2088                         return initio_wait_done_disc(host);
2089                 default:
2090                         initio_msgout_reject(host);
2091                         break;
2092                 }
2093                 if (host->phase != MSG_IN)
2094                         return host->phase;
2095         }
2096         /* statement won't reach here */
2097 }
2098
2099 static int initio_msgout_reject(struct initio_host * host)
2100 {
2101         outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
2102
2103         if (initio_msgin_accept(host) == -1)
2104                 return -1;
2105
2106         if (host->phase == MSG_OUT) {
2107                 outb(MESSAGE_REJECT, host->addr + TUL_SFifo);           /* Msg reject           */
2108                 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2109                 return wait_tulip(host);
2110         }
2111         return host->phase;
2112 }
2113
2114 static int initio_msgout_ide(struct initio_host * host)
2115 {
2116         outb(INITIATOR_ERROR, host->addr + TUL_SFifo);          /* Initiator Detected Error */
2117         outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2118         return wait_tulip(host);
2119 }
2120
2121 static int initio_msgin_extend(struct initio_host * host)
2122 {
2123         u8 len, idx;
2124
2125         if (initio_msgin_accept(host) != MSG_IN)
2126                 return host->phase;
2127
2128         /* Get extended msg length      */
2129         outl(1, host->addr + TUL_SCnt0);
2130         outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
2131         if (wait_tulip(host) == -1)
2132                 return -1;
2133
2134         len = inb(host->addr + TUL_SFifo);
2135         host->msg[0] = len;
2136         for (idx = 1; len != 0; len--) {
2137
2138                 if ((initio_msgin_accept(host)) != MSG_IN)
2139                         return host->phase;
2140                 outl(1, host->addr + TUL_SCnt0);
2141                 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
2142                 if (wait_tulip(host) == -1)
2143                         return -1;
2144                 host->msg[idx++] = inb(host->addr + TUL_SFifo);
2145         }
2146         if (host->msg[1] == 1) {                /* if it's synchronous data transfer request */
2147                 u8 r;
2148                 if (host->msg[0] != 3)  /* if length is not right */
2149                         return initio_msgout_reject(host);
2150                 if (host->active_tc->flags & TCF_NO_SYNC_NEGO) {        /* Set OFFSET=0 to do async, nego back */
2151                         host->msg[3] = 0;
2152                 } else {
2153                         if (initio_msgin_sync(host) == 0 &&
2154                             (host->active_tc->flags & TCF_SYNC_DONE)) {
2155                                 initio_sync_done(host);
2156                                 return initio_msgin_accept(host);
2157                         }
2158                 }
2159
2160                 r = inb(host->addr + TUL_SSignal);
2161                 outb((r & (TSC_SET_ACK | 7)) | TSC_SET_ATN,
2162                         host->addr + TUL_SSignal);
2163                 if (initio_msgin_accept(host) != MSG_OUT)
2164                         return host->phase;
2165                 /* sync msg out */
2166                 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
2167
2168                 initio_sync_done(host);
2169
2170                 outb(EXTENDED_MESSAGE, host->addr + TUL_SFifo);
2171                 outb(3, host->addr + TUL_SFifo);
2172                 outb(EXTENDED_SDTR, host->addr + TUL_SFifo);
2173                 outb(host->msg[2], host->addr + TUL_SFifo);
2174                 outb(host->msg[3], host->addr + TUL_SFifo);
2175                 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2176                 return wait_tulip(host);
2177         }
2178         if (host->msg[0] != 2 || host->msg[1] != 3)
2179                 return initio_msgout_reject(host);
2180         /* if it's WIDE DATA XFER REQ   */
2181         if (host->active_tc->flags & TCF_NO_WDTR) {
2182                 host->msg[2] = 0;
2183         } else {
2184                 if (host->msg[2] > 2)   /* > 32 bits            */
2185                         return initio_msgout_reject(host);
2186                 if (host->msg[2] == 2) {                /* == 32                */
2187                         host->msg[2] = 1;
2188                 } else {
2189                         if ((host->active_tc->flags & TCF_NO_WDTR) == 0) {
2190                                 wdtr_done(host);
2191                                 if ((host->active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0)
2192                                         outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
2193                                 return initio_msgin_accept(host);
2194                         }
2195                 }
2196         }
2197         outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
2198
2199         if (initio_msgin_accept(host) != MSG_OUT)
2200                 return host->phase;
2201         /* WDTR msg out                 */
2202         outb(EXTENDED_MESSAGE, host->addr + TUL_SFifo);
2203         outb(2, host->addr + TUL_SFifo);
2204         outb(EXTENDED_WDTR, host->addr + TUL_SFifo);
2205         outb(host->msg[2], host->addr + TUL_SFifo);
2206         outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2207         return wait_tulip(host);
2208 }
2209
2210 static int initio_msgin_sync(struct initio_host * host)
2211 {
2212         char default_period;
2213
2214         default_period = initio_rate_tbl[host->active_tc->flags & TCF_SCSI_RATE];
2215         if (host->msg[3] > MAX_OFFSET) {
2216                 host->msg[3] = MAX_OFFSET;
2217                 if (host->msg[2] < default_period) {
2218                         host->msg[2] = default_period;
2219                         return 1;
2220                 }
2221                 if (host->msg[2] >= 59) /* Change to async              */
2222                         host->msg[3] = 0;
2223                 return 1;
2224         }
2225         /* offset requests asynchronous transfers ? */
2226         if (host->msg[3] == 0) {
2227                 return 0;
2228         }
2229         if (host->msg[2] < default_period) {
2230                 host->msg[2] = default_period;
2231                 return 1;
2232         }
2233         if (host->msg[2] >= 59) {
2234                 host->msg[3] = 0;
2235                 return 1;
2236         }
2237         return 0;
2238 }
2239
2240 static int wdtr_done(struct initio_host * host)
2241 {
2242         host->active_tc->flags &= ~TCF_SYNC_DONE;
2243         host->active_tc->flags |= TCF_WDTR_DONE;
2244
2245         host->active_tc->js_period = 0;
2246         if (host->msg[2])       /* if 16 bit */
2247                 host->active_tc->js_period |= TSC_WIDE_SCSI;
2248         host->active_tc->sconfig0 &= ~TSC_ALT_PERIOD;
2249         outb(host->active_tc->sconfig0, host->addr + TUL_SConfig);
2250         outb(host->active_tc->js_period, host->addr + TUL_SPeriod);
2251
2252         return 1;
2253 }
2254
2255 static int initio_sync_done(struct initio_host * host)
2256 {
2257         int i;
2258
2259         host->active_tc->flags |= TCF_SYNC_DONE;
2260
2261         if (host->msg[3]) {
2262                 host->active_tc->js_period |= host->msg[3];
2263                 for (i = 0; i < 8; i++) {
2264                         if (initio_rate_tbl[i] >= host->msg[2]) /* pick the big one */
2265                                 break;
2266                 }
2267                 host->active_tc->js_period |= (i << 4);
2268                 host->active_tc->sconfig0 |= TSC_ALT_PERIOD;
2269         }
2270         outb(host->active_tc->sconfig0, host->addr + TUL_SConfig);
2271         outb(host->active_tc->js_period, host->addr + TUL_SPeriod);
2272
2273         return -1;
2274 }
2275
2276
2277 static int initio_post_scsi_rst(struct initio_host * host)
2278 {
2279         struct scsi_ctrl_blk *scb;
2280         struct target_control *active_tc;
2281         int i;
2282
2283         host->active = NULL;
2284         host->active_tc = NULL;
2285         host->flags = 0;
2286
2287         while ((scb = initio_pop_busy_scb(host)) != NULL) {
2288                 scb->hastat = HOST_BAD_PHAS;
2289                 initio_append_done_scb(host, scb);
2290         }
2291         /* clear sync done flag         */
2292         active_tc = &host->targets[0];
2293         for (i = 0; i < host->max_tar; active_tc++, i++) {
2294                 active_tc->flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
2295                 /* Initialize the sync. xfer register values to an asyn xfer */
2296                 active_tc->js_period = 0;
2297                 active_tc->sconfig0 = host->sconf1;
2298                 host->act_tags[0] = 0;  /* 07/22/98 */
2299                 host->targets[i].flags &= ~TCF_BUSY;    /* 07/22/98 */
2300         }                       /* for */
2301
2302         return -1;
2303 }
2304
2305 static void initio_select_atn_stop(struct initio_host * host, struct scsi_ctrl_blk * scb)
2306 {
2307         scb->status |= SCB_SELECT;
2308         scb->next_state = 0x1;
2309         host->active = scb;
2310         host->active_tc = &host->targets[scb->target];
2311         outb(TSC_SELATNSTOP, host->addr + TUL_SCmd);
2312 }
2313
2314
2315 static void initio_select_atn(struct initio_host * host, struct scsi_ctrl_blk * scb)
2316 {
2317         int i;
2318
2319         scb->status |= SCB_SELECT;
2320         scb->next_state = 0x2;
2321
2322         outb(scb->ident, host->addr + TUL_SFifo);
2323         for (i = 0; i < (int) scb->cdblen; i++)
2324                 outb(scb->cdb[i], host->addr + TUL_SFifo);
2325         host->active_tc = &host->targets[scb->target];
2326         host->active = scb;
2327         outb(TSC_SEL_ATN, host->addr + TUL_SCmd);
2328 }
2329
2330 static void initio_select_atn3(struct initio_host * host, struct scsi_ctrl_blk * scb)
2331 {
2332         int i;
2333
2334         scb->status |= SCB_SELECT;
2335         scb->next_state = 0x2;
2336
2337         outb(scb->ident, host->addr + TUL_SFifo);
2338         outb(scb->tagmsg, host->addr + TUL_SFifo);
2339         outb(scb->tagid, host->addr + TUL_SFifo);
2340         for (i = 0; i < scb->cdblen; i++)
2341                 outb(scb->cdb[i], host->addr + TUL_SFifo);
2342         host->active_tc = &host->targets[scb->target];
2343         host->active = scb;
2344         outb(TSC_SEL_ATN3, host->addr + TUL_SCmd);
2345 }
2346
2347 /**
2348  *      initio_bus_device_reset -        SCSI Bus Device Reset
2349  *      @host: InitIO host to reset
2350  *
2351  *      Perform a device reset and abort all pending SCBs for the
2352  *      victim device
2353  */
2354 int initio_bus_device_reset(struct initio_host * host)
2355 {
2356         struct scsi_ctrl_blk *scb = host->active;
2357         struct target_control *active_tc = host->active_tc;
2358         struct scsi_ctrl_blk *tmp, *prev;
2359         u8 tar;
2360
2361         if (host->phase != MSG_OUT)
2362                 return int_initio_bad_seq(host);        /* Unexpected phase */
2363
2364         initio_unlink_pend_scb(host, scb);
2365         initio_release_scb(host, scb);
2366
2367
2368         tar = scb->target;      /* target                       */
2369         active_tc->flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE | TCF_BUSY);
2370         /* clr sync. nego & WDTR flags  07/22/98 */
2371
2372         /* abort all SCB with same target */
2373         prev = tmp = host->first_busy;  /* Check Busy queue */
2374         while (tmp != NULL) {
2375                 if (tmp->target == tar) {
2376                         /* unlink it */
2377                         if (tmp == host->first_busy) {
2378                                 if ((host->first_busy = tmp->next) == NULL)
2379                                         host->last_busy = NULL;
2380                         } else {
2381                                 prev->next = tmp->next;
2382                                 if (tmp == host->last_busy)
2383                                         host->last_busy = prev;
2384                         }
2385                         tmp->hastat = HOST_ABORTED;
2386                         initio_append_done_scb(host, tmp);
2387                 }
2388                 /* Previous haven't change      */
2389                 else {
2390                         prev = tmp;
2391                 }
2392                 tmp = tmp->next;
2393         }
2394         outb(TARGET_RESET, host->addr + TUL_SFifo);
2395         outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2396         return initio_wait_disc(host);
2397
2398 }
2399
2400 static int initio_msgin_accept(struct initio_host * host)
2401 {
2402         outb(TSC_MSG_ACCEPT, host->addr + TUL_SCmd);
2403         return wait_tulip(host);
2404 }
2405
2406 static int wait_tulip(struct initio_host * host)
2407 {
2408
2409         while (!((host->jsstatus0 = inb(host->addr + TUL_SStatus0))
2410                  & TSS_INT_PENDING))
2411                         cpu_relax();
2412
2413         host->jsint = inb(host->addr + TUL_SInt);
2414         host->phase = host->jsstatus0 & TSS_PH_MASK;
2415         host->jsstatus1 = inb(host->addr + TUL_SStatus1);
2416
2417         if (host->jsint & TSS_RESEL_INT)        /* if SCSI bus reset detected */
2418                 return int_initio_resel(host);
2419         if (host->jsint & TSS_SEL_TIMEOUT)      /* if selected/reselected timeout interrupt */
2420                 return int_initio_busfree(host);
2421         if (host->jsint & TSS_SCSIRST_INT)      /* if SCSI bus reset detected   */
2422                 return int_initio_scsi_rst(host);
2423
2424         if (host->jsint & TSS_DISC_INT) {       /* BUS disconnection            */
2425                 if (host->flags & HCF_EXPECT_DONE_DISC) {
2426                         outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */
2427                         initio_unlink_busy_scb(host, host->active);
2428                         host->active->hastat = 0;
2429                         initio_append_done_scb(host, host->active);
2430                         host->active = NULL;
2431                         host->active_tc = NULL;
2432                         host->flags &= ~HCF_EXPECT_DONE_DISC;
2433                         outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
2434                         outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */
2435                         return -1;
2436                 }
2437                 if (host->flags & HCF_EXPECT_DISC) {
2438                         outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */
2439                         host->active = NULL;
2440                         host->active_tc = NULL;
2441                         host->flags &= ~HCF_EXPECT_DISC;
2442                         outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
2443                         outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */
2444                         return -1;
2445                 }
2446                 return int_initio_busfree(host);
2447         }
2448         /* The old code really does the below. Can probably be removed */
2449         if (host->jsint & (TSS_FUNC_COMP | TSS_BUS_SERV))
2450                 return host->phase;
2451         return host->phase;
2452 }
2453
2454 static int initio_wait_disc(struct initio_host * host)
2455 {
2456         while (!((host->jsstatus0 = inb(host->addr + TUL_SStatus0)) & TSS_INT_PENDING))
2457                 cpu_relax();
2458
2459         host->jsint = inb(host->addr + TUL_SInt);
2460
2461         if (host->jsint & TSS_SCSIRST_INT)      /* if SCSI bus reset detected */
2462                 return int_initio_scsi_rst(host);
2463         if (host->jsint & TSS_DISC_INT) {       /* BUS disconnection */
2464                 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */
2465                 outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
2466                 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */
2467                 host->active = NULL;
2468                 return -1;
2469         }
2470         return initio_bad_seq(host);
2471 }
2472
2473 static int initio_wait_done_disc(struct initio_host * host)
2474 {
2475         while (!((host->jsstatus0 = inb(host->addr + TUL_SStatus0))
2476                  & TSS_INT_PENDING))
2477                  cpu_relax();
2478
2479         host->jsint = inb(host->addr + TUL_SInt);
2480
2481         if (host->jsint & TSS_SCSIRST_INT)      /* if SCSI bus reset detected */
2482                 return int_initio_scsi_rst(host);
2483         if (host->jsint & TSS_DISC_INT) {       /* BUS disconnection */
2484                 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);          /* Flush SCSI FIFO */
2485                 outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
2486                 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1);         /* Enable HW reselect */
2487                 initio_unlink_busy_scb(host, host->active);
2488
2489                 initio_append_done_scb(host, host->active);
2490                 host->active = NULL;
2491                 return -1;
2492         }
2493         return initio_bad_seq(host);
2494 }
2495
2496 /**
2497  *      i91u_intr               -       IRQ handler
2498  *      @irqno: IRQ number
2499  *      @dev_id: IRQ identifier
2500  *
2501  *      Take the relevant locks and then invoke the actual isr processing
2502  *      code under the lock.
2503  */
2504
2505 static irqreturn_t i91u_intr(int irqno, void *dev_id)
2506 {
2507         struct Scsi_Host *dev = dev_id;
2508         unsigned long flags;
2509         int r;
2510
2511         spin_lock_irqsave(dev->host_lock, flags);
2512         r = initio_isr((struct initio_host *)dev->hostdata);
2513         spin_unlock_irqrestore(dev->host_lock, flags);
2514         if (r)
2515                 return IRQ_HANDLED;
2516         else
2517                 return IRQ_NONE;
2518 }
2519
2520
2521 /**
2522  *      initio_build_scb                -       Build the mappings and SCB
2523  *      @host: InitIO host taking the command
2524  *      @cblk: Firmware command block
2525  *      @cmnd: SCSI midlayer command block
2526  *
2527  *      Translate the abstract SCSI command into a firmware command block
2528  *      suitable for feeding to the InitIO host controller. This also requires
2529  *      we build the scatter gather lists and ensure they are mapped properly.
2530  */
2531
2532 static void initio_build_scb(struct initio_host * host, struct scsi_ctrl_blk * cblk, struct scsi_cmnd * cmnd)
2533 {                               /* Create corresponding SCB     */
2534         struct scatterlist *sglist;
2535         struct sg_entry *sg;            /* Pointer to SG list           */
2536         int i, nseg;
2537         long total_len;
2538         dma_addr_t dma_addr;
2539
2540         /* Fill in the command headers */
2541         cblk->post = i91uSCBPost;       /* i91u's callback routine      */
2542         cblk->srb = cmnd;
2543         cblk->opcode = ExecSCSI;
2544         cblk->flags = SCF_POST; /* After SCSI done, call post routine */
2545         cblk->target = cmnd->device->id;
2546         cblk->lun = cmnd->device->lun;
2547         cblk->ident = cmnd->device->lun | DISC_ALLOW;
2548
2549         cblk->flags |= SCF_SENSE;       /* Turn on auto request sense   */
2550
2551         /* Map the sense buffer into bus memory */
2552         dma_addr = dma_map_single(&host->pci_dev->dev, cmnd->sense_buffer,
2553                                   SENSE_SIZE, DMA_FROM_DEVICE);
2554         cblk->senseptr = (u32)dma_addr;
2555         cblk->senselen = SENSE_SIZE;
2556         cmnd->SCp.ptr = (char *)(unsigned long)dma_addr;
2557         cblk->cdblen = cmnd->cmd_len;
2558
2559         /* Clear the returned status */
2560         cblk->hastat = 0;
2561         cblk->tastat = 0;
2562         /* Command the command */
2563         memcpy(cblk->cdb, cmnd->cmnd, cmnd->cmd_len);
2564
2565         /* Set up tags */
2566         if (cmnd->device->tagged_supported) {   /* Tag Support                  */
2567                 cblk->tagmsg = SIMPLE_QUEUE_TAG;        /* Do simple tag only   */
2568         } else {
2569                 cblk->tagmsg = 0;       /* No tag support               */
2570         }
2571
2572         /* todo handle map_sg error */
2573         nseg = scsi_dma_map(cmnd);
2574         BUG_ON(nseg < 0);
2575         if (nseg) {
2576                 dma_addr = dma_map_single(&host->pci_dev->dev, &cblk->sglist[0],
2577                                           sizeof(struct sg_entry) * TOTAL_SG_ENTRY,
2578                                           DMA_BIDIRECTIONAL);
2579                 cblk->bufptr = (u32)dma_addr;
2580                 cmnd->SCp.dma_handle = dma_addr;
2581
2582                 cblk->sglen = nseg;
2583
2584                 cblk->flags |= SCF_SG;  /* Turn on SG list flag       */
2585                 total_len = 0;
2586                 sg = &cblk->sglist[0];
2587                 scsi_for_each_sg(cmnd, sglist, cblk->sglen, i) {
2588                         sg->data = cpu_to_le32((u32)sg_dma_address(sglist));
2589                         sg->len = cpu_to_le32((u32)sg_dma_len(sglist));
2590                         total_len += sg_dma_len(sglist);
2591                         ++sg;
2592                 }
2593
2594                 cblk->buflen = (scsi_bufflen(cmnd) > total_len) ?
2595                         total_len : scsi_bufflen(cmnd);
2596         } else {        /* No data transfer required */
2597                 cblk->buflen = 0;
2598                 cblk->sglen = 0;
2599         }
2600 }
2601
2602 /**
2603  *      i91u_queuecommand_lck   -       Queue a new command if possible
2604  *      @cmd: SCSI command block from the mid layer
2605  *      @done: Completion handler
2606  *
2607  *      Attempts to queue a new command with the host adapter. Will return
2608  *      zero if successful or indicate a host busy condition if not (which
2609  *      will cause the mid layer to call us again later with the command)
2610  */
2611
2612 static int i91u_queuecommand_lck(struct scsi_cmnd *cmd,
2613                 void (*done)(struct scsi_cmnd *))
2614 {
2615         struct initio_host *host = (struct initio_host *) cmd->device->host->hostdata;
2616         struct scsi_ctrl_blk *cmnd;
2617
2618         cmd->scsi_done = done;
2619
2620         cmnd = initio_alloc_scb(host);
2621         if (!cmnd)
2622                 return SCSI_MLQUEUE_HOST_BUSY;
2623
2624         initio_build_scb(host, cmnd, cmd);
2625         initio_exec_scb(host, cmnd);
2626         return 0;
2627 }
2628
2629 static DEF_SCSI_QCMD(i91u_queuecommand)
2630
2631 /**
2632  *      i91u_bus_reset          -       reset the SCSI bus
2633  *      @cmnd: Command block we want to trigger the reset for
2634  *
2635  *      Initiate a SCSI bus reset sequence
2636  */
2637
2638 static int i91u_bus_reset(struct scsi_cmnd * cmnd)
2639 {
2640         struct initio_host *host;
2641
2642         host = (struct initio_host *) cmnd->device->host->hostdata;
2643
2644         spin_lock_irq(cmnd->device->host->host_lock);
2645         initio_reset_scsi(host, 0);
2646         spin_unlock_irq(cmnd->device->host->host_lock);
2647
2648         return SUCCESS;
2649 }
2650
2651 /**
2652  *      i91u_biosparam                  -       return the "logical geometry
2653  *      @sdev: SCSI device
2654  *      @dev: Matching block device
2655  *      @capacity: Sector size of drive
2656  *      @info_array: Return space for BIOS geometry
2657  *
2658  *      Map the device geometry in a manner compatible with the host
2659  *      controller BIOS behaviour.
2660  *
2661  *      FIXME: limited to 2^32 sector devices.
2662  */
2663
2664 static int i91u_biosparam(struct scsi_device *sdev, struct block_device *dev,
2665                 sector_t capacity, int *info_array)
2666 {
2667         struct initio_host *host;               /* Point to Host adapter control block */
2668         struct target_control *tc;
2669
2670         host = (struct initio_host *) sdev->host->hostdata;
2671         tc = &host->targets[sdev->id];
2672
2673         if (tc->heads) {
2674                 info_array[0] = tc->heads;
2675                 info_array[1] = tc->sectors;
2676                 info_array[2] = (unsigned long)capacity / tc->heads / tc->sectors;
2677         } else {
2678                 if (tc->drv_flags & TCF_DRV_255_63) {
2679                         info_array[0] = 255;
2680                         info_array[1] = 63;
2681                         info_array[2] = (unsigned long)capacity / 255 / 63;
2682                 } else {
2683                         info_array[0] = 64;
2684                         info_array[1] = 32;
2685                         info_array[2] = (unsigned long)capacity >> 11;
2686                 }
2687         }
2688
2689 #if defined(DEBUG_BIOSPARAM)
2690         if (i91u_debug & debug_biosparam) {
2691                 printk("bios geometry: head=%d, sec=%d, cyl=%d\n",
2692                        info_array[0], info_array[1], info_array[2]);
2693                 printk("WARNING: check, if the bios geometry is correct.\n");
2694         }
2695 #endif
2696
2697         return 0;
2698 }
2699
2700 /**
2701  *      i91u_unmap_scb          -       Unmap a command
2702  *      @pci_dev: PCI device the command is for
2703  *      @cmnd: The command itself
2704  *
2705  *      Unmap any PCI mapping/IOMMU resources allocated when the command
2706  *      was mapped originally as part of initio_build_scb
2707  */
2708
2709 static void i91u_unmap_scb(struct pci_dev *pci_dev, struct scsi_cmnd *cmnd)
2710 {
2711         /* auto sense buffer */
2712         if (cmnd->SCp.ptr) {
2713                 dma_unmap_single(&pci_dev->dev,
2714                                  (dma_addr_t)((unsigned long)cmnd->SCp.ptr),
2715                                  SENSE_SIZE, DMA_FROM_DEVICE);
2716                 cmnd->SCp.ptr = NULL;
2717         }
2718
2719         /* request buffer */
2720         if (scsi_sg_count(cmnd)) {
2721                 dma_unmap_single(&pci_dev->dev, cmnd->SCp.dma_handle,
2722                                  sizeof(struct sg_entry) * TOTAL_SG_ENTRY,
2723                                  DMA_BIDIRECTIONAL);
2724
2725                 scsi_dma_unmap(cmnd);
2726         }
2727 }
2728
2729 /*
2730  *      i91uSCBPost             -       SCSI callback
2731  *
2732  *      This is callback routine be called when tulip finish one
2733  *      SCSI command.
2734  */
2735
2736 static void i91uSCBPost(u8 * host_mem, u8 * cblk_mem)
2737 {
2738         struct scsi_cmnd *cmnd; /* Pointer to SCSI request block */
2739         struct initio_host *host;
2740         struct scsi_ctrl_blk *cblk;
2741
2742         host = (struct initio_host *) host_mem;
2743         cblk = (struct scsi_ctrl_blk *) cblk_mem;
2744         if ((cmnd = cblk->srb) == NULL) {
2745                 printk(KERN_ERR "i91uSCBPost: SRB pointer is empty\n");
2746                 WARN_ON(1);
2747                 initio_release_scb(host, cblk); /* Release SCB for current channel */
2748                 return;
2749         }
2750
2751         /*
2752          *      Remap the firmware error status into a mid layer one
2753          */
2754         switch (cblk->hastat) {
2755         case 0x0:
2756         case 0xa:               /* Linked command complete without error and linked normally */
2757         case 0xb:               /* Linked command complete without error interrupt generated */
2758                 cblk->hastat = 0;
2759                 break;
2760
2761         case 0x11:              /* Selection time out-The initiator selection or target
2762                                    reselection was not complete within the SCSI Time out period */
2763                 cblk->hastat = DID_TIME_OUT;
2764                 break;
2765
2766         case 0x14:              /* Target bus phase sequence failure-An invalid bus phase or bus
2767                                    phase sequence was requested by the target. The host adapter
2768                                    will generate a SCSI Reset Condition, notifying the host with
2769                                    a SCRD interrupt */
2770                 cblk->hastat = DID_RESET;
2771                 break;
2772
2773         case 0x1a:              /* SCB Aborted. 07/21/98 */
2774                 cblk->hastat = DID_ABORT;
2775                 break;
2776
2777         case 0x12:              /* Data overrun/underrun-The target attempted to transfer more data
2778                                    than was allocated by the Data Length field or the sum of the
2779                                    Scatter / Gather Data Length fields. */
2780         case 0x13:              /* Unexpected bus free-The target dropped the SCSI BSY at an unexpected time. */
2781         case 0x16:              /* Invalid SCB Operation Code. */
2782
2783         default:
2784                 printk("ini9100u: %x %x\n", cblk->hastat, cblk->tastat);
2785                 cblk->hastat = DID_ERROR;       /* Couldn't find any better */
2786                 break;
2787         }
2788
2789         cmnd->result = cblk->tastat | (cblk->hastat << 16);
2790         i91u_unmap_scb(host->pci_dev, cmnd);
2791         cmnd->scsi_done(cmnd);  /* Notify system DONE           */
2792         initio_release_scb(host, cblk); /* Release SCB for current channel */
2793 }
2794
2795 static struct scsi_host_template initio_template = {
2796         .proc_name              = "INI9100U",
2797         .name                   = "Initio INI-9X00U/UW SCSI device driver",
2798         .queuecommand           = i91u_queuecommand,
2799         .eh_bus_reset_handler   = i91u_bus_reset,
2800         .bios_param             = i91u_biosparam,
2801         .can_queue              = MAX_TARGETS * i91u_MAXQUEUE,
2802         .this_id                = 1,
2803         .sg_tablesize           = SG_ALL,
2804 };
2805
2806 static int initio_probe_one(struct pci_dev *pdev,
2807         const struct pci_device_id *id)
2808 {
2809         struct Scsi_Host *shost;
2810         struct initio_host *host;
2811         u32 reg;
2812         u16 bios_seg;
2813         struct scsi_ctrl_blk *scb, *tmp, *prev = NULL /* silence gcc */;
2814         int num_scb, i, error;
2815
2816         error = pci_enable_device(pdev);
2817         if (error)
2818                 return error;
2819
2820         pci_read_config_dword(pdev, 0x44, (u32 *) & reg);
2821         bios_seg = (u16) (reg & 0xFF);
2822         if (((reg & 0xFF00) >> 8) == 0xFF)
2823                 reg = 0;
2824         bios_seg = (bios_seg << 8) + ((u16) ((reg & 0xFF00) >> 8));
2825
2826         if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(32))) {
2827                 printk(KERN_WARNING  "i91u: Could not set 32 bit DMA mask\n");
2828                 error = -ENODEV;
2829                 goto out_disable_device;
2830         }
2831         shost = scsi_host_alloc(&initio_template, sizeof(struct initio_host));
2832         if (!shost) {
2833                 printk(KERN_WARNING "initio: Could not allocate host structure.\n");
2834                 error = -ENOMEM;
2835                 goto out_disable_device;
2836         }
2837         host = (struct initio_host *)shost->hostdata;
2838         memset(host, 0, sizeof(struct initio_host));
2839         host->addr = pci_resource_start(pdev, 0);
2840         host->bios_addr = bios_seg;
2841
2842         if (!request_region(host->addr, 256, "i91u")) {
2843                 printk(KERN_WARNING "initio: I/O port range 0x%x is busy.\n", host->addr);
2844                 error = -ENODEV;
2845                 goto out_host_put;
2846         }
2847
2848         if (initio_tag_enable)  /* 1.01i */
2849                 num_scb = MAX_TARGETS * i91u_MAXQUEUE;
2850         else
2851                 num_scb = MAX_TARGETS + 3;      /* 1-tape, 1-CD_ROM, 1- extra */
2852
2853         for (; num_scb >= MAX_TARGETS + 3; num_scb--) {
2854                 i = num_scb * sizeof(struct scsi_ctrl_blk);
2855                 if ((scb = kzalloc(i, GFP_DMA)) != NULL)
2856                         break;
2857         }
2858
2859         if (!scb) {
2860                 printk(KERN_WARNING "initio: Cannot allocate SCB array.\n");
2861                 error = -ENOMEM;
2862                 goto out_release_region;
2863         }
2864
2865         host->pci_dev = pdev;
2866
2867         host->semaph = 1;
2868         spin_lock_init(&host->semaph_lock);
2869         host->num_scbs = num_scb;
2870         host->scb = scb;
2871         host->next_pending = scb;
2872         host->next_avail = scb;
2873         for (i = 0, tmp = scb; i < num_scb; i++, tmp++) {
2874                 tmp->tagid = i;
2875                 if (i != 0)
2876                         prev->next = tmp;
2877                 prev = tmp;
2878         }
2879         prev->next = NULL;
2880         host->scb_end = tmp;
2881         host->first_avail = scb;
2882         host->last_avail = prev;
2883         spin_lock_init(&host->avail_lock);
2884
2885         initio_init(host, phys_to_virt(((u32)bios_seg << 4)));
2886
2887         host->jsstatus0 = 0;
2888
2889         shost->io_port = host->addr;
2890         shost->n_io_port = 0xff;
2891         shost->can_queue = num_scb;             /* 03/05/98                      */
2892         shost->unique_id = host->addr;
2893         shost->max_id = host->max_tar;
2894         shost->max_lun = 32;    /* 10/21/97                     */
2895         shost->irq = pdev->irq;
2896         shost->this_id = host->scsi_id; /* Assign HCS index           */
2897         shost->base = host->addr;
2898         shost->sg_tablesize = TOTAL_SG_ENTRY;
2899
2900         error = request_irq(pdev->irq, i91u_intr, IRQF_SHARED, "i91u", shost);
2901         if (error < 0) {
2902                 printk(KERN_WARNING "initio: Unable to request IRQ %d\n", pdev->irq);
2903                 goto out_free_scbs;
2904         }
2905
2906         pci_set_drvdata(pdev, shost);
2907
2908         error = scsi_add_host(shost, &pdev->dev);
2909         if (error)
2910                 goto out_free_irq;
2911         scsi_scan_host(shost);
2912         return 0;
2913 out_free_irq:
2914         free_irq(pdev->irq, shost);
2915 out_free_scbs:
2916         kfree(host->scb);
2917 out_release_region:
2918         release_region(host->addr, 256);
2919 out_host_put:
2920         scsi_host_put(shost);
2921 out_disable_device:
2922         pci_disable_device(pdev);
2923         return error;
2924 }
2925
2926 /**
2927  *      initio_remove_one       -       control shutdown
2928  *      @pdev:  PCI device being released
2929  *
2930  *      Release the resources assigned to this adapter after it has
2931  *      finished being used.
2932  */
2933
2934 static void initio_remove_one(struct pci_dev *pdev)
2935 {
2936         struct Scsi_Host *host = pci_get_drvdata(pdev);
2937         struct initio_host *s = (struct initio_host *)host->hostdata;
2938         scsi_remove_host(host);
2939         free_irq(pdev->irq, host);
2940         release_region(s->addr, 256);
2941         scsi_host_put(host);
2942         pci_disable_device(pdev);
2943 }
2944
2945 MODULE_LICENSE("GPL");
2946
2947 static struct pci_device_id initio_pci_tbl[] = {
2948         {PCI_VENDOR_ID_INIT, 0x9500, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2949         {PCI_VENDOR_ID_INIT, 0x9400, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2950         {PCI_VENDOR_ID_INIT, 0x9401, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2951         {PCI_VENDOR_ID_INIT, 0x0002, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2952         {PCI_VENDOR_ID_DOMEX, 0x0002, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2953         {0,}
2954 };
2955 MODULE_DEVICE_TABLE(pci, initio_pci_tbl);
2956
2957 static struct pci_driver initio_pci_driver = {
2958         .name           = "initio",
2959         .id_table       = initio_pci_tbl,
2960         .probe          = initio_probe_one,
2961         .remove         = initio_remove_one,
2962 };
2963 module_pci_driver(initio_pci_driver);
2964
2965 MODULE_DESCRIPTION("Initio INI-9X00U/UW SCSI device driver");
2966 MODULE_AUTHOR("Initio Corporation");
2967 MODULE_LICENSE("GPL");