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  *      @num_scbs: Number of SCBS
 550  *      @bios_addr: BIOS address
 551  *
 552  *      Set up the host adapter and devices according to the configuration
 553  *      retrieved from the E2PROM.
 554  *
 555  *      Locking: Calls E2PROM layer code which is not re-enterable so must
 556  *      run single threaded for now.
 557  */
 558
 559 static void initio_init(struct initio_host * host, u8 *bios_addr)
 560 {
 561         int i;
 562         u8 *flags;
 563         u8 *heads;
 564
 565         /* Get E2Prom configuration */
 566         initio_read_eeprom(host->addr);
 567         if (i91unvramp->NVM_SCSIInfo[0].NVM_NumOfTarg == 8)
 568                 host->max_tar = 8;
 569         else
 570                 host->max_tar = 16;
 571
 572         host->config = i91unvramp->NVM_SCSIInfo[0].NVM_ChConfig1;
 573
 574         host->scsi_id = i91unvramp->NVM_SCSIInfo[0].NVM_ChSCSIID;
 575         host->idmask = ~(1 << host->scsi_id);
 576
 577 #ifdef CHK_PARITY
 578         /* Enable parity error response */
 579         outb(inb(host->addr + TUL_PCMD) | 0x40, host->addr + TUL_PCMD);
 580 #endif
 581
 582         /* Mask all the interrupt       */
 583         outb(0x1F, host->addr + TUL_Mask);
 584
 585         initio_stop_bm(host);
 586         /* --- Initialize the tulip --- */
 587         outb(TSC_RST_CHIP, host->addr + TUL_SCtrl0);
 588
 589         /* program HBA's SCSI ID        */
 590         outb(host->scsi_id << 4, host->addr + TUL_SScsiId);
 591
 592         /* Enable Initiator Mode ,phase latch,alternate sync period mode,
 593            disable SCSI reset */
 594         if (host->config & HCC_EN_PAR)
 595                 host->sconf1 = (TSC_INITDEFAULT | TSC_EN_SCSI_PAR);
 596         else
 597                 host->sconf1 = (TSC_INITDEFAULT);
 598         outb(host->sconf1, host->addr + TUL_SConfig);
 599
 600         /* Enable HW reselect */
 601         outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1);
 602
 603         outb(0, host->addr + TUL_SPeriod);
 604
 605         /* selection time out = 250 ms */
 606         outb(153, host->addr + TUL_STimeOut);
 607
 608         /* Enable SCSI terminator */
 609         outb((host->config & (HCC_ACT_TERM1 | HCC_ACT_TERM2)),
 610                 host->addr + TUL_XCtrl);
 611         outb(((host->config & HCC_AUTO_TERM) >> 4) |
 612                 (inb(host->addr + TUL_GCTRL1) & 0xFE),
 613                 host->addr + TUL_GCTRL1);
 614
 615         for (i = 0,
 616              flags = & (i91unvramp->NVM_SCSIInfo[0].NVM_Targ0Config),
 617              heads = bios_addr + 0x180;
 618              i < host->max_tar;
 619              i++, flags++) {
 620                 host->targets[i].flags = *flags & ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
 621                 if (host->targets[i].flags & TCF_EN_255)
 622                         host->targets[i].drv_flags = TCF_DRV_255_63;
 623                 else
 624                         host->targets[i].drv_flags = 0;
 625                 host->targets[i].js_period = 0;
 626                 host->targets[i].sconfig0 = host->sconf1;
 627                 host->targets[i].heads = *heads++;
 628                 if (host->targets[i].heads == 255)
 629                         host->targets[i].drv_flags = TCF_DRV_255_63;
 630                 else
 631                         host->targets[i].drv_flags = 0;
 632                 host->targets[i].sectors = *heads++;
 633                 host->targets[i].flags &= ~TCF_BUSY;
 634                 host->act_tags[i] = 0;
 635                 host->max_tags[i] = 0xFF;
 636         }                       /* for                          */
 637         printk("i91u: PCI Base=0x%04X, IRQ=%d, BIOS=0x%04X0, SCSI ID=%d\n",
 638                host->addr, host->pci_dev->irq,
 639                host->bios_addr, host->scsi_id);
 640         /* Reset SCSI Bus */
 641         if (host->config & HCC_SCSI_RESET) {
 642                 printk(KERN_INFO "i91u: Reset SCSI Bus ... \n");
 643                 initio_reset_scsi(host, 10);
 644         }
 645         outb(0x17, host->addr + TUL_SCFG1);
 646         outb(0xE9, host->addr + TUL_SIntEnable);
 647 }
 648
 649 /**
 650  *      initio_alloc_scb                -       Allocate an SCB
 651  *      @host: InitIO host we are allocating for
 652  *
 653  *      Walk the SCB list for the controller and allocate a free SCB if
 654  *      one exists.
 655  */
 656 static struct scsi_ctrl_blk *initio_alloc_scb(struct initio_host *host)
 657 {
 658         struct scsi_ctrl_blk *scb;
 659         unsigned long flags;
 660
 661         spin_lock_irqsave(&host->avail_lock, flags);
 662         if ((scb = host->first_avail) != NULL) {
 663 #if DEBUG_QUEUE
 664                 printk("find scb at %p\n", scb);
 665 #endif
 666                 if ((host->first_avail = scb->next) == NULL)
 667                         host->last_avail = NULL;
 668                 scb->next = NULL;
 669                 scb->status = SCB_RENT;
 670         }
 671         spin_unlock_irqrestore(&host->avail_lock, flags);
 672         return scb;
 673 }
 674
 675 /**
 676  *      initio_release_scb              -       Release an SCB
 677  *      @host: InitIO host that owns the SCB
 678  *      @cmnd: SCB command block being returned
 679  *
 680  *      Return an allocated SCB to the host free list
 681  */
 682
 683 static void initio_release_scb(struct initio_host * host, struct scsi_ctrl_blk * cmnd)
 684 {
 685         unsigned long flags;
 686
 687 #if DEBUG_QUEUE
 688         printk("Release SCB %p; ", cmnd);
 689 #endif
 690         spin_lock_irqsave(&(host->avail_lock), flags);
 691         cmnd->srb = NULL;
 692         cmnd->status = 0;
 693         cmnd->next = NULL;
 694         if (host->last_avail != NULL) {
 695                 host->last_avail->next = cmnd;
 696                 host->last_avail = cmnd;
 697         } else {
 698                 host->first_avail = cmnd;
 699                 host->last_avail = cmnd;
 700         }
 701         spin_unlock_irqrestore(&(host->avail_lock), flags);
 702 }
 703
 704 /***************************************************************************/
 705 static void initio_append_pend_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
 706 {
 707
 708 #if DEBUG_QUEUE
 709         printk("Append pend SCB %p; ", scbp);
 710 #endif
 711         scbp->status = SCB_PEND;
 712         scbp->next = NULL;
 713         if (host->last_pending != NULL) {
 714                 host->last_pending->next = scbp;
 715                 host->last_pending = scbp;
 716         } else {
 717                 host->first_pending = scbp;
 718                 host->last_pending = scbp;
 719         }
 720 }
 721
 722 /***************************************************************************/
 723 static void initio_push_pend_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
 724 {
 725
 726 #if DEBUG_QUEUE
 727         printk("Push pend SCB %p; ", scbp);
 728 #endif
 729         scbp->status = SCB_PEND;
 730         if ((scbp->next = host->first_pending) != NULL) {
 731                 host->first_pending = scbp;
 732         } else {
 733                 host->first_pending = scbp;
 734                 host->last_pending = scbp;
 735         }
 736 }
 737
 738 static struct scsi_ctrl_blk *initio_find_first_pend_scb(struct initio_host * host)
 739 {
 740         struct scsi_ctrl_blk *first;
 741
 742
 743         first = host->first_pending;
 744         while (first != NULL) {
 745                 if (first->opcode != ExecSCSI)
 746                         return first;
 747                 if (first->tagmsg == 0) {
 748                         if ((host->act_tags[first->target] == 0) &&
 749                             !(host->targets[first->target].flags & TCF_BUSY))
 750                                 return first;
 751                 } else {
 752                         if ((host->act_tags[first->target] >=
 753                           host->max_tags[first->target]) |
 754                             (host->targets[first->target].flags & TCF_BUSY)) {
 755                                 first = first->next;
 756                                 continue;
 757                         }
 758                         return first;
 759                 }
 760                 first = first->next;
 761         }
 762         return first;
 763 }
 764
 765 static void initio_unlink_pend_scb(struct initio_host * host, struct scsi_ctrl_blk * scb)
 766 {
 767         struct scsi_ctrl_blk *tmp, *prev;
 768
 769 #if DEBUG_QUEUE
 770         printk("unlink pend SCB %p; ", scb);
 771 #endif
 772
 773         prev = tmp = host->first_pending;
 774         while (tmp != NULL) {
 775                 if (scb == tmp) {       /* Unlink this SCB              */
 776                         if (tmp == host->first_pending) {
 777                                 if ((host->first_pending = tmp->next) == NULL)
 778                                         host->last_pending = NULL;
 779                         } else {
 780                                 prev->next = tmp->next;
 781                                 if (tmp == host->last_pending)
 782                                         host->last_pending = prev;
 783                         }
 784                         tmp->next = NULL;
 785                         break;
 786                 }
 787                 prev = tmp;
 788                 tmp = tmp->next;
 789         }
 790 }
 791
 792 static void initio_append_busy_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
 793 {
 794
 795 #if DEBUG_QUEUE
 796         printk("append busy SCB %p; ", scbp);
 797 #endif
 798         if (scbp->tagmsg)
 799                 host->act_tags[scbp->target]++;
 800         else
 801                 host->targets[scbp->target].flags |= TCF_BUSY;
 802         scbp->status = SCB_BUSY;
 803         scbp->next = NULL;
 804         if (host->last_busy != NULL) {
 805                 host->last_busy->next = scbp;
 806                 host->last_busy = scbp;
 807         } else {
 808                 host->first_busy = scbp;
 809                 host->last_busy = scbp;
 810         }
 811 }
 812
 813 /***************************************************************************/
 814 static struct scsi_ctrl_blk *initio_pop_busy_scb(struct initio_host * host)
 815 {
 816         struct scsi_ctrl_blk *tmp;
 817
 818
 819         if ((tmp = host->first_busy) != NULL) {
 820                 if ((host->first_busy = tmp->next) == NULL)
 821                         host->last_busy = NULL;
 822                 tmp->next = NULL;
 823                 if (tmp->tagmsg)
 824                         host->act_tags[tmp->target]--;
 825                 else
 826                         host->targets[tmp->target].flags &= ~TCF_BUSY;
 827         }
 828 #if DEBUG_QUEUE
 829         printk("Pop busy SCB %p; ", tmp);
 830 #endif
 831         return tmp;
 832 }
 833
 834 /***************************************************************************/
 835 static void initio_unlink_busy_scb(struct initio_host * host, struct scsi_ctrl_blk * scb)
 836 {
 837         struct scsi_ctrl_blk *tmp, *prev;
 838
 839 #if DEBUG_QUEUE
 840         printk("unlink busy SCB %p; ", scb);
 841 #endif
 842
 843         prev = tmp = host->first_busy;
 844         while (tmp != NULL) {
 845                 if (scb == tmp) {       /* Unlink this SCB              */
 846                         if (tmp == host->first_busy) {
 847                                 if ((host->first_busy = tmp->next) == NULL)
 848                                         host->last_busy = NULL;
 849                         } else {
 850                                 prev->next = tmp->next;
 851                                 if (tmp == host->last_busy)
 852                                         host->last_busy = prev;
 853                         }
 854                         tmp->next = NULL;
 855                         if (tmp->tagmsg)
 856                                 host->act_tags[tmp->target]--;
 857                         else
 858                                 host->targets[tmp->target].flags &= ~TCF_BUSY;
 859                         break;
 860                 }
 861                 prev = tmp;
 862                 tmp = tmp->next;
 863         }
 864         return;
 865 }
 866
 867 struct scsi_ctrl_blk *initio_find_busy_scb(struct initio_host * host, u16 tarlun)
 868 {
 869         struct scsi_ctrl_blk *tmp, *prev;
 870         u16 scbp_tarlun;
 871
 872
 873         prev = tmp = host->first_busy;
 874         while (tmp != NULL) {
 875                 scbp_tarlun = (tmp->lun << 8) | (tmp->target);
 876                 if (scbp_tarlun == tarlun) {    /* Unlink this SCB              */
 877                         break;
 878                 }
 879                 prev = tmp;
 880                 tmp = tmp->next;
 881         }
 882 #if DEBUG_QUEUE
 883         printk("find busy SCB %p; ", tmp);
 884 #endif
 885         return tmp;
 886 }
 887
 888 static void initio_append_done_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
 889 {
 890 #if DEBUG_QUEUE
 891         printk("append done SCB %p; ", scbp);
 892 #endif
 893
 894         scbp->status = SCB_DONE;
 895         scbp->next = NULL;
 896         if (host->last_done != NULL) {
 897                 host->last_done->next = scbp;
 898                 host->last_done = scbp;
 899         } else {
 900                 host->first_done = scbp;
 901                 host->last_done = scbp;
 902         }
 903 }
 904
 905 struct scsi_ctrl_blk *initio_find_done_scb(struct initio_host * host)
 906 {
 907         struct scsi_ctrl_blk *tmp;
 908
 909         if ((tmp = host->first_done) != NULL) {
 910                 if ((host->first_done = tmp->next) == NULL)
 911                         host->last_done = NULL;
 912                 tmp->next = NULL;
 913         }
 914 #if DEBUG_QUEUE
 915         printk("find done SCB %p; ",tmp);
 916 #endif
 917         return tmp;
 918 }
 919
 920 static int initio_abort_srb(struct initio_host * host, struct scsi_cmnd *srbp)
 921 {
 922         unsigned long flags;
 923         struct scsi_ctrl_blk *tmp, *prev;
 924
 925         spin_lock_irqsave(&host->semaph_lock, flags);
 926
 927         if ((host->semaph == 0) && (host->active == NULL)) {
 928                 /* disable Jasmin SCSI Int        */
 929                 outb(0x1F, host->addr + TUL_Mask);
 930                 spin_unlock_irqrestore(&host->semaph_lock, flags);
 931                 /* FIXME: synchronize_irq needed ? */
 932                 tulip_main(host);
 933                 spin_lock_irqsave(&host->semaph_lock, flags);
 934                 host->semaph = 1;
 935                 outb(0x0F, host->addr + TUL_Mask);
 936                 spin_unlock_irqrestore(&host->semaph_lock, flags);
 937                 return SCSI_ABORT_SNOOZE;
 938         }
 939         prev = tmp = host->first_pending;       /* Check Pend queue */
 940         while (tmp != NULL) {
 941                 /* 07/27/98 */
 942                 if (tmp->srb == srbp) {
 943                         if (tmp == host->active) {
 944                                 spin_unlock_irqrestore(&host->semaph_lock, flags);
 945                                 return SCSI_ABORT_BUSY;
 946                         } else if (tmp == host->first_pending) {
 947                                 if ((host->first_pending = tmp->next) == NULL)
 948                                         host->last_pending = NULL;
 949                         } else {
 950                                 prev->next = tmp->next;
 951                                 if (tmp == host->last_pending)
 952                                         host->last_pending = prev;
 953                         }
 954                         tmp->hastat = HOST_ABORTED;
 955                         tmp->flags |= SCF_DONE;
 956                         if (tmp->flags & SCF_POST)
 957                                 (*tmp->post) ((u8 *) host, (u8 *) tmp);
 958                         spin_unlock_irqrestore(&host->semaph_lock, flags);
 959                         return SCSI_ABORT_SUCCESS;
 960                 }
 961                 prev = tmp;
 962                 tmp = tmp->next;
 963         }
 964
 965         prev = tmp = host->first_busy;  /* Check Busy queue */
 966         while (tmp != NULL) {
 967                 if (tmp->srb == srbp) {
 968                         if (tmp == host->active) {
 969                                 spin_unlock_irqrestore(&host->semaph_lock, flags);
 970                                 return SCSI_ABORT_BUSY;
 971                         } else if (tmp->tagmsg == 0) {
 972                                 spin_unlock_irqrestore(&host->semaph_lock, flags);
 973                                 return SCSI_ABORT_BUSY;
 974                         } else {
 975                                 host->act_tags[tmp->target]--;
 976                                 if (tmp == host->first_busy) {
 977                                         if ((host->first_busy = tmp->next) == NULL)
 978                                                 host->last_busy = NULL;
 979                                 } else {
 980                                         prev->next = tmp->next;
 981                                         if (tmp == host->last_busy)
 982                                                 host->last_busy = prev;
 983                                 }
 984                                 tmp->next = NULL;
 985
 986
 987                                 tmp->hastat = HOST_ABORTED;
 988                                 tmp->flags |= SCF_DONE;
 989                                 if (tmp->flags & SCF_POST)
 990                                         (*tmp->post) ((u8 *) host, (u8 *) tmp);
 991                                 spin_unlock_irqrestore(&host->semaph_lock, flags);
 992                                 return SCSI_ABORT_SUCCESS;
 993                         }
 994                 }
 995                 prev = tmp;
 996                 tmp = tmp->next;
 997         }
 998         spin_unlock_irqrestore(&host->semaph_lock, flags);
 999         return SCSI_ABORT_NOT_RUNNING;
1000 }
1001
1002 /***************************************************************************/
1003 static int initio_bad_seq(struct initio_host * host)
1004 {
1005         struct scsi_ctrl_blk *scb;
1006
1007         printk("initio_bad_seg c=%d\n", host->index);
1008
1009         if ((scb = host->active) != NULL) {
1010                 initio_unlink_busy_scb(host, scb);
1011                 scb->hastat = HOST_BAD_PHAS;
1012                 scb->tastat = 0;
1013                 initio_append_done_scb(host, scb);
1014         }
1015         initio_stop_bm(host);
1016         initio_reset_scsi(host, 8);     /* 7/29/98 */
1017         return initio_post_scsi_rst(host);
1018 }
1019
1020
1021 /************************************************************************/
1022 static void initio_exec_scb(struct initio_host * host, struct scsi_ctrl_blk * scb)
1023 {
1024         unsigned long flags;
1025
1026         scb->mode = 0;
1027
1028         scb->sgidx = 0;
1029         scb->sgmax = scb->sglen;
1030
1031         spin_lock_irqsave(&host->semaph_lock, flags);
1032
1033         initio_append_pend_scb(host, scb);      /* Append this SCB to Pending queue */
1034
1035 /* VVVVV 07/21/98 */
1036         if (host->semaph == 1) {
1037                 /* Disable Jasmin SCSI Int */
1038                 outb(0x1F, host->addr + TUL_Mask);
1039                 host->semaph = 0;
1040                 spin_unlock_irqrestore(&host->semaph_lock, flags);
1041
1042                 tulip_main(host);
1043
1044                 spin_lock_irqsave(&host->semaph_lock, flags);
1045                 host->semaph = 1;
1046                 outb(0x0F, host->addr + TUL_Mask);
1047         }
1048         spin_unlock_irqrestore(&host->semaph_lock, flags);
1049         return;
1050 }
1051
1052 /***************************************************************************/
1053 static int initio_isr(struct initio_host * host)
1054 {
1055         if (inb(host->addr + TUL_Int) & TSS_INT_PENDING) {
1056                 if (host->semaph == 1) {
1057                         outb(0x1F, host->addr + TUL_Mask);
1058                         /* Disable Tulip SCSI Int */
1059                         host->semaph = 0;
1060
1061                         tulip_main(host);
1062
1063                         host->semaph = 1;
1064                         outb(0x0F, host->addr + TUL_Mask);
1065                         return 1;
1066                 }
1067         }
1068         return 0;
1069 }
1070
1071 static int tulip_main(struct initio_host * host)
1072 {
1073         struct scsi_ctrl_blk *scb;
1074
1075         for (;;) {
1076                 tulip_scsi(host);       /* Call tulip_scsi              */
1077
1078                 /* Walk the list of completed SCBs */
1079                 while ((scb = initio_find_done_scb(host)) != NULL) {    /* find done entry */
1080                         if (scb->tastat == INI_QUEUE_FULL) {
1081                                 host->max_tags[scb->target] =
1082                                     host->act_tags[scb->target] - 1;
1083                                 scb->tastat = 0;
1084                                 initio_append_pend_scb(host, scb);
1085                                 continue;
1086                         }
1087                         if (!(scb->mode & SCM_RSENS)) {         /* not in auto req. sense mode */
1088                                 if (scb->tastat == 2) {
1089
1090                                         /* clr sync. nego flag */
1091
1092                                         if (scb->flags & SCF_SENSE) {
1093                                                 u8 len;
1094                                                 len = scb->senselen;
1095                                                 if (len == 0)
1096                                                         len = 1;
1097                                                 scb->buflen = scb->senselen;
1098                                                 scb->bufptr = scb->senseptr;
1099                                                 scb->flags &= ~(SCF_SG | SCF_DIR);      /* for xfer_data_in */
1100                                                 /* so, we won't report wrong direction in xfer_data_in,
1101                                                    and won't report HOST_DO_DU in state_6 */
1102                                                 scb->mode = SCM_RSENS;
1103                                                 scb->ident &= 0xBF;     /* Disable Disconnect */
1104                                                 scb->tagmsg = 0;
1105                                                 scb->tastat = 0;
1106                                                 scb->cdblen = 6;
1107                                                 scb->cdb[0] = SCSICMD_RequestSense;
1108                                                 scb->cdb[1] = 0;
1109                                                 scb->cdb[2] = 0;
1110                                                 scb->cdb[3] = 0;
1111                                                 scb->cdb[4] = len;
1112                                                 scb->cdb[5] = 0;
1113                                                 initio_push_pend_scb(host, scb);
1114                                                 break;
1115                                         }
1116                                 }
1117                         } else {        /* in request sense mode */
1118
1119                                 if (scb->tastat == 2) {         /* check contition status again after sending
1120                                                                            requset sense cmd 0x3 */
1121                                         scb->hastat = HOST_BAD_PHAS;
1122                                 }
1123                                 scb->tastat = 2;
1124                         }
1125                         scb->flags |= SCF_DONE;
1126                         if (scb->flags & SCF_POST) {
1127                                 /* FIXME: only one post method and lose casts */
1128                                 (*scb->post) ((u8 *) host, (u8 *) scb);
1129                         }
1130                 }               /* while */
1131                 /* find_active: */
1132                 if (inb(host->addr + TUL_SStatus0) & TSS_INT_PENDING)
1133                         continue;
1134                 if (host->active)       /* return to OS and wait for xfer_done_ISR/Selected_ISR */
1135                         return 1;       /* return to OS, enable interrupt */
1136                 /* Check pending SCB            */
1137                 if (initio_find_first_pend_scb(host) == NULL)
1138                         return 1;       /* return to OS, enable interrupt */
1139         }                       /* End of for loop */
1140         /* statement won't reach here */
1141 }
1142
1143 static void tulip_scsi(struct initio_host * host)
1144 {
1145         struct scsi_ctrl_blk *scb;
1146         struct target_control *active_tc;
1147
1148         /* make sure to service interrupt asap */
1149         if ((host->jsstatus0 = inb(host->addr + TUL_SStatus0)) & TSS_INT_PENDING) {
1150                 host->phase = host->jsstatus0 & TSS_PH_MASK;
1151                 host->jsstatus1 = inb(host->addr + TUL_SStatus1);
1152                 host->jsint = inb(host->addr + TUL_SInt);
1153                 if (host->jsint & TSS_SCSIRST_INT) {    /* SCSI bus reset detected      */
1154                         int_initio_scsi_rst(host);
1155                         return;
1156                 }
1157                 if (host->jsint & TSS_RESEL_INT) {      /* if selected/reselected interrupt */
1158                         if (int_initio_resel(host) == 0)
1159                                 initio_next_state(host);
1160                         return;
1161                 }
1162                 if (host->jsint & TSS_SEL_TIMEOUT) {
1163                         int_initio_busfree(host);
1164                         return;
1165                 }
1166                 if (host->jsint & TSS_DISC_INT) {       /* BUS disconnection            */
1167                         int_initio_busfree(host);       /* unexpected bus free or sel timeout */
1168                         return;
1169                 }
1170                 if (host->jsint & (TSS_FUNC_COMP | TSS_BUS_SERV)) {     /* func complete or Bus service */
1171                         if ((scb = host->active) != NULL)
1172                                 initio_next_state(host);
1173                         return;
1174                 }
1175         }
1176         if (host->active != NULL)
1177                 return;
1178
1179         if ((scb = initio_find_first_pend_scb(host)) == NULL)
1180                 return;
1181
1182         /* program HBA's SCSI ID & target SCSI ID */
1183         outb((host->scsi_id << 4) | (scb->target & 0x0F),
1184                 host->addr + TUL_SScsiId);
1185         if (scb->opcode == ExecSCSI) {
1186                 active_tc = &host->targets[scb->target];
1187
1188                 if (scb->tagmsg)
1189                         active_tc->drv_flags |= TCF_DRV_EN_TAG;
1190                 else
1191                         active_tc->drv_flags &= ~TCF_DRV_EN_TAG;
1192
1193                 outb(active_tc->js_period, host->addr + TUL_SPeriod);
1194                 if ((active_tc->flags & (TCF_WDTR_DONE | TCF_NO_WDTR)) == 0) {  /* do wdtr negotiation          */
1195                         initio_select_atn_stop(host, scb);
1196                 } else {
1197                         if ((active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0) {     /* do sync negotiation          */
1198                                 initio_select_atn_stop(host, scb);
1199                         } else {
1200                                 if (scb->tagmsg)
1201                                         initio_select_atn3(host, scb);
1202                                 else
1203                                         initio_select_atn(host, scb);
1204                         }
1205                 }
1206                 if (scb->flags & SCF_POLL) {
1207                         while (wait_tulip(host) != -1) {
1208                                 if (initio_next_state(host) == -1)
1209                                         break;
1210                         }
1211                 }
1212         } else if (scb->opcode == BusDevRst) {
1213                 initio_select_atn_stop(host, scb);
1214                 scb->next_state = 8;
1215                 if (scb->flags & SCF_POLL) {
1216                         while (wait_tulip(host) != -1) {
1217                                 if (initio_next_state(host) == -1)
1218                                         break;
1219                         }
1220                 }
1221         } else if (scb->opcode == AbortCmd) {
1222                 if (initio_abort_srb(host, scb->srb) != 0) {
1223                         initio_unlink_pend_scb(host, scb);
1224                         initio_release_scb(host, scb);
1225                 } else {
1226                         scb->opcode = BusDevRst;
1227                         initio_select_atn_stop(host, scb);
1228                         scb->next_state = 8;
1229                 }
1230         } else {
1231                 initio_unlink_pend_scb(host, scb);
1232                 scb->hastat = 0x16;     /* bad command */
1233                 initio_append_done_scb(host, scb);
1234         }
1235         return;
1236 }
1237
1238 /**
1239  *      initio_next_state               -       Next SCSI state
1240  *      @host: InitIO host we are processing
1241  *
1242  *      Progress the active command block along the state machine
1243  *      until we hit a state which we must wait for activity to occur.
1244  *
1245  *      Returns zero or a negative code.
1246  */
1247
1248 static int initio_next_state(struct initio_host * host)
1249 {
1250         int next;
1251
1252         next = host->active->next_state;
1253         for (;;) {
1254                 switch (next) {
1255                 case 1:
1256                         next = initio_state_1(host);
1257                         break;
1258                 case 2:
1259                         next = initio_state_2(host);
1260                         break;
1261                 case 3:
1262                         next = initio_state_3(host);
1263                         break;
1264                 case 4:
1265                         next = initio_state_4(host);
1266                         break;
1267                 case 5:
1268                         next = initio_state_5(host);
1269                         break;
1270                 case 6:
1271                         next = initio_state_6(host);
1272                         break;
1273                 case 7:
1274                         next = initio_state_7(host);
1275                         break;
1276                 case 8:
1277                         return initio_bus_device_reset(host);
1278                 default:
1279                         return initio_bad_seq(host);
1280                 }
1281                 if (next <= 0)
1282                         return next;
1283         }
1284 }
1285
1286
1287 /**
1288  *      initio_state_1          -       SCSI state machine
1289  *      @host: InitIO host we are controlling
1290  *
1291  *      Perform SCSI state processing for Select/Attention/Stop
1292  */
1293
1294 static int initio_state_1(struct initio_host * host)
1295 {
1296         struct scsi_ctrl_blk *scb = host->active;
1297         struct target_control *active_tc = host->active_tc;
1298 #if DEBUG_STATE
1299         printk("-s1-");
1300 #endif
1301
1302         /* Move the SCB from pending to busy */
1303         initio_unlink_pend_scb(host, scb);
1304         initio_append_busy_scb(host, scb);
1305
1306         outb(active_tc->sconfig0, host->addr + TUL_SConfig );
1307         /* ATN on */
1308         if (host->phase == MSG_OUT) {
1309                 outb(TSC_EN_BUS_IN | TSC_HW_RESELECT, host->addr + TUL_SCtrl1);
1310                 outb(scb->ident, host->addr + TUL_SFifo);
1311
1312                 if (scb->tagmsg) {
1313                         outb(scb->tagmsg, host->addr + TUL_SFifo);
1314                         outb(scb->tagid, host->addr + TUL_SFifo);
1315                 }
1316                 if ((active_tc->flags & (TCF_WDTR_DONE | TCF_NO_WDTR)) == 0) {
1317                         active_tc->flags |= TCF_WDTR_DONE;
1318                         outb(EXTENDED_MESSAGE, host->addr + TUL_SFifo);
1319                         outb(2, host->addr + TUL_SFifo);        /* Extended msg length */
1320                         outb(EXTENDED_SDTR, host->addr + TUL_SFifo);    /* Sync request */
1321                         outb(1, host->addr + TUL_SFifo);        /* Start from 16 bits */
1322                 } else if ((active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0) {
1323                         active_tc->flags |= TCF_SYNC_DONE;
1324                         outb(EXTENDED_MESSAGE, host->addr + TUL_SFifo);
1325                         outb(3, host->addr + TUL_SFifo);        /* extended msg length */
1326                         outb(EXTENDED_SDTR, host->addr + TUL_SFifo);    /* sync request */
1327                         outb(initio_rate_tbl[active_tc->flags & TCF_SCSI_RATE], host->addr + TUL_SFifo);
1328                         outb(MAX_OFFSET, host->addr + TUL_SFifo);       /* REQ/ACK offset */
1329                 }
1330                 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1331                 if (wait_tulip(host) == -1)
1332                         return -1;
1333         }
1334         outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1335         outb((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)), host->addr + TUL_SSignal);
1336         /* Into before CDB xfer */
1337         return 3;
1338 }
1339
1340
1341 /**
1342  *      initio_state_2          -       SCSI state machine
1343  *      @host: InitIO host we are controlling
1344  *
1345  * state after selection with attention
1346  * state after selection with attention3
1347  */
1348
1349 static int initio_state_2(struct initio_host * host)
1350 {
1351         struct scsi_ctrl_blk *scb = host->active;
1352         struct target_control *active_tc = host->active_tc;
1353 #if DEBUG_STATE
1354         printk("-s2-");
1355 #endif
1356
1357         initio_unlink_pend_scb(host, scb);
1358         initio_append_busy_scb(host, scb);
1359
1360         outb(active_tc->sconfig0, host->addr + TUL_SConfig);
1361
1362         if (host->jsstatus1 & TSS_CMD_PH_CMP)
1363                 return 4;
1364
1365         outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1366         outb((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)), host->addr + TUL_SSignal);
1367         /* Into before CDB xfer */
1368         return 3;
1369 }
1370
1371 /**
1372  *      initio_state_3          -       SCSI state machine
1373  *      @host: InitIO host we are controlling
1374  *
1375  * state before CDB xfer is done
1376  */
1377
1378 static int initio_state_3(struct initio_host * host)
1379 {
1380         struct scsi_ctrl_blk *scb = host->active;
1381         struct target_control *active_tc = host->active_tc;
1382         int i;
1383
1384 #if DEBUG_STATE
1385         printk("-s3-");
1386 #endif
1387         for (;;) {
1388                 switch (host->phase) {
1389                 case CMD_OUT:   /* Command out phase            */
1390                         for (i = 0; i < (int) scb->cdblen; i++)
1391                                 outb(scb->cdb[i], host->addr + TUL_SFifo);
1392                         outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1393                         if (wait_tulip(host) == -1)
1394                                 return -1;
1395                         if (host->phase == CMD_OUT)
1396                                 return initio_bad_seq(host);
1397                         return 4;
1398
1399                 case MSG_IN:    /* Message in phase             */
1400                         scb->next_state = 3;
1401                         if (initio_msgin(host) == -1)
1402                                 return -1;
1403                         break;
1404
1405                 case STATUS_IN: /* Status phase                 */
1406                         if (initio_status_msg(host) == -1)
1407                                 return -1;
1408                         break;
1409
1410                 case MSG_OUT:   /* Message out phase            */
1411                         if (active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) {
1412                                 outb(NOP, host->addr + TUL_SFifo);              /* msg nop */
1413                                 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1414                                 if (wait_tulip(host) == -1)
1415                                         return -1;
1416                         } else {
1417                                 active_tc->flags |= TCF_SYNC_DONE;
1418
1419                                 outb(EXTENDED_MESSAGE, host->addr + TUL_SFifo);
1420                                 outb(3, host->addr + TUL_SFifo);        /* ext. msg len */
1421                                 outb(EXTENDED_SDTR, host->addr + TUL_SFifo);    /* sync request */
1422                                 outb(initio_rate_tbl[active_tc->flags & TCF_SCSI_RATE], host->addr + TUL_SFifo);
1423                                 outb(MAX_OFFSET, host->addr + TUL_SFifo);       /* REQ/ACK offset */
1424                                 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1425                                 if (wait_tulip(host) == -1)
1426                                         return -1;
1427                                 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1428                                 outb(inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7), host->addr + TUL_SSignal);
1429
1430                         }
1431                         break;
1432                 default:
1433                         return initio_bad_seq(host);
1434                 }
1435         }
1436 }
1437
1438 /**
1439  *      initio_state_4          -       SCSI state machine
1440  *      @host: InitIO host we are controlling
1441  *
1442  *      SCSI state machine. State 4
1443  */
1444
1445 static int initio_state_4(struct initio_host * host)
1446 {
1447         struct scsi_ctrl_blk *scb = host->active;
1448
1449 #if DEBUG_STATE
1450         printk("-s4-");
1451 #endif
1452         if ((scb->flags & SCF_DIR) == SCF_NO_XF) {
1453                 return 6;       /* Go to state 6 (After data) */
1454         }
1455         for (;;) {
1456                 if (scb->buflen == 0)
1457                         return 6;
1458
1459                 switch (host->phase) {
1460
1461                 case STATUS_IN: /* Status phase                 */
1462                         if ((scb->flags & SCF_DIR) != 0)        /* if direction bit set then report data underrun */
1463                                 scb->hastat = HOST_DO_DU;
1464                         if ((initio_status_msg(host)) == -1)
1465                                 return -1;
1466                         break;
1467
1468                 case MSG_IN:    /* Message in phase             */
1469                         scb->next_state = 0x4;
1470                         if (initio_msgin(host) == -1)
1471                                 return -1;
1472                         break;
1473
1474                 case MSG_OUT:   /* Message out phase            */
1475                         if (host->jsstatus0 & TSS_PAR_ERROR) {
1476                                 scb->buflen = 0;
1477                                 scb->hastat = HOST_DO_DU;
1478                                 if (initio_msgout_ide(host) == -1)
1479                                         return -1;
1480                                 return 6;
1481                         } else {
1482                                 outb(NOP, host->addr + TUL_SFifo);              /* msg nop */
1483                                 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1484                                 if (wait_tulip(host) == -1)
1485                                         return -1;
1486                         }
1487                         break;
1488
1489                 case DATA_IN:   /* Data in phase                */
1490                         return initio_xfer_data_in(host);
1491
1492                 case DATA_OUT:  /* Data out phase               */
1493                         return initio_xfer_data_out(host);
1494
1495                 default:
1496                         return initio_bad_seq(host);
1497                 }
1498         }
1499 }
1500
1501
1502 /**
1503  *      initio_state_5          -       SCSI state machine
1504  *      @host: InitIO host we are controlling
1505  *
1506  *      State after dma xfer done or phase change before xfer done
1507  */
1508
1509 static int initio_state_5(struct initio_host * host)
1510 {
1511         struct scsi_ctrl_blk *scb = host->active;
1512         long cnt, xcnt;         /* cannot use unsigned !! code: if (xcnt < 0) */
1513
1514 #if DEBUG_STATE
1515         printk("-s5-");
1516 #endif
1517         /*------ get remaining count -------*/
1518         cnt = inl(host->addr + TUL_SCnt0) & 0x0FFFFFF;
1519
1520         if (inb(host->addr + TUL_XCmd) & 0x20) {
1521                 /* ----------------------- DATA_IN ----------------------------- */
1522                 /* check scsi parity error */
1523                 if (host->jsstatus0 & TSS_PAR_ERROR)
1524                         scb->hastat = HOST_DO_DU;
1525                 if (inb(host->addr + TUL_XStatus) & XPEND) {    /* DMA xfer pending, Send STOP  */
1526                         /* tell Hardware  scsi xfer has been terminated */
1527                         outb(inb(host->addr + TUL_XCtrl) | 0x80, host->addr + TUL_XCtrl);
1528                         /* wait until DMA xfer not pending */
1529                         while (inb(host->addr + TUL_XStatus) & XPEND)
1530                                 cpu_relax();
1531                 }
1532         } else {
1533                 /*-------- DATA OUT -----------*/
1534                 if ((inb(host->addr + TUL_SStatus1) & TSS_XFER_CMP) == 0) {
1535                         if (host->active_tc->js_period & TSC_WIDE_SCSI)
1536                                 cnt += (inb(host->addr + TUL_SFifoCnt) & 0x1F) << 1;
1537                         else
1538                                 cnt += (inb(host->addr + TUL_SFifoCnt) & 0x1F);
1539                 }
1540                 if (inb(host->addr + TUL_XStatus) & XPEND) {    /* if DMA xfer is pending, abort DMA xfer */
1541                         outb(TAX_X_ABT, host->addr + TUL_XCmd);
1542                         /* wait Abort DMA xfer done */
1543                         while ((inb(host->addr + TUL_Int) & XABT) == 0)
1544                                 cpu_relax();
1545                 }
1546                 if ((cnt == 1) && (host->phase == DATA_OUT)) {
1547                         outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1548                         if (wait_tulip(host) == -1)
1549                                 return -1;
1550                         cnt = 0;
1551                 } else {
1552                         if ((inb(host->addr + TUL_SStatus1) & TSS_XFER_CMP) == 0)
1553                                 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1554                 }
1555         }
1556         if (cnt == 0) {
1557                 scb->buflen = 0;
1558                 return 6;       /* After Data */
1559         }
1560         /* Update active data pointer */
1561         xcnt = (long) scb->buflen - cnt;        /* xcnt== bytes already xferred */
1562         scb->buflen = (u32) cnt;                /* cnt == bytes left to be xferred */
1563         if (scb->flags & SCF_SG) {
1564                 struct sg_entry *sgp;
1565                 unsigned long i;
1566
1567                 sgp = &scb->sglist[scb->sgidx];
1568                 for (i = scb->sgidx; i < scb->sgmax; sgp++, i++) {
1569                         xcnt -= (long) sgp->len;
1570                         if (xcnt < 0) {         /* this sgp xfer half done */
1571                                 xcnt += (long) sgp->len;        /* xcnt == bytes xferred in this sgp */
1572                                 sgp->data += (u32) xcnt;        /* new ptr to be xfer */
1573                                 sgp->len -= (u32) xcnt; /* new len to be xfer */
1574                                 scb->bufptr += ((u32) (i - scb->sgidx) << 3);
1575                                 /* new SG table ptr */
1576                                 scb->sglen = (u8) (scb->sgmax - i);
1577                                 /* new SG table len */
1578                                 scb->sgidx = (u16) i;
1579                                 /* for next disc and come in this loop */
1580                                 return 4;       /* Go to state 4                */
1581                         }
1582                         /* else (xcnt >= 0 , i.e. this sgp already xferred */
1583                 }               /* for */
1584                 return 6;       /* Go to state 6                */
1585         } else {
1586                 scb->bufptr += (u32) xcnt;
1587         }
1588         return 4;               /* Go to state 4                */
1589 }
1590
1591 /**
1592  *      initio_state_6          -       SCSI state machine
1593  *      @host: InitIO host we are controlling
1594  *
1595  *      State after Data phase
1596  */
1597
1598 static int initio_state_6(struct initio_host * host)
1599 {
1600         struct scsi_ctrl_blk *scb = host->active;
1601
1602 #if DEBUG_STATE
1603         printk("-s6-");
1604 #endif
1605         for (;;) {
1606                 switch (host->phase) {
1607                 case STATUS_IN: /* Status phase                 */
1608                         if ((initio_status_msg(host)) == -1)
1609                                 return -1;
1610                         break;
1611
1612                 case MSG_IN:    /* Message in phase             */
1613                         scb->next_state = 6;
1614                         if ((initio_msgin(host)) == -1)
1615                                 return -1;
1616                         break;
1617
1618                 case MSG_OUT:   /* Message out phase            */
1619                         outb(NOP, host->addr + TUL_SFifo);              /* msg nop */
1620                         outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1621                         if (wait_tulip(host) == -1)
1622                                 return -1;
1623                         break;
1624
1625                 case DATA_IN:   /* Data in phase                */
1626                         return initio_xpad_in(host);
1627
1628                 case DATA_OUT:  /* Data out phase               */
1629                         return initio_xpad_out(host);
1630
1631                 default:
1632                         return initio_bad_seq(host);
1633                 }
1634         }
1635 }
1636
1637 /**
1638  *      initio_state_7          -       SCSI state machine
1639  *      @host: InitIO host we are controlling
1640  *
1641  */
1642
1643 static int initio_state_7(struct initio_host * host)
1644 {
1645         int cnt, i;
1646
1647 #if DEBUG_STATE
1648         printk("-s7-");
1649 #endif
1650         /* flush SCSI FIFO */
1651         cnt = inb(host->addr + TUL_SFifoCnt) & 0x1F;
1652         if (cnt) {
1653                 for (i = 0; i < cnt; i++)
1654                         inb(host->addr + TUL_SFifo);
1655         }
1656         switch (host->phase) {
1657         case DATA_IN:           /* Data in phase                */
1658         case DATA_OUT:          /* Data out phase               */
1659                 return initio_bad_seq(host);
1660         default:
1661                 return 6;       /* Go to state 6                */
1662         }
1663 }
1664
1665 /**
1666  *      initio_xfer_data_in     -       Commence data input
1667  *      @host: InitIO host in use
1668  *
1669  *      Commence a block of data transfer. The transfer itself will
1670  *      be managed by the controller and we will get a completion (or
1671  *      failure) interrupt.
1672  */
1673 static int initio_xfer_data_in(struct initio_host * host)
1674 {
1675         struct scsi_ctrl_blk *scb = host->active;
1676
1677         if ((scb->flags & SCF_DIR) == SCF_DOUT)
1678                 return 6;       /* wrong direction */
1679
1680         outl(scb->buflen, host->addr + TUL_SCnt0);
1681         outb(TSC_XF_DMA_IN, host->addr + TUL_SCmd);     /* 7/25/95 */
1682
1683         if (scb->flags & SCF_SG) {      /* S/G xfer */
1684                 outl(((u32) scb->sglen) << 3, host->addr + TUL_XCntH);
1685                 outl(scb->bufptr, host->addr + TUL_XAddH);
1686                 outb(TAX_SG_IN, host->addr + TUL_XCmd);
1687         } else {
1688                 outl(scb->buflen, host->addr + TUL_XCntH);
1689                 outl(scb->bufptr, host->addr + TUL_XAddH);
1690                 outb(TAX_X_IN, host->addr + TUL_XCmd);
1691         }
1692         scb->next_state = 0x5;
1693         return 0;               /* return to OS, wait xfer done , let jas_isr come in */
1694 }
1695
1696 /**
1697  *      initio_xfer_data_out    -       Commence data output
1698  *      @host: InitIO host in use
1699  *
1700  *      Commence a block of data transfer. The transfer itself will
1701  *      be managed by the controller and we will get a completion (or
1702  *      failure) interrupt.
1703  */
1704
1705 static int initio_xfer_data_out(struct initio_host * host)
1706 {
1707         struct scsi_ctrl_blk *scb = host->active;
1708
1709         if ((scb->flags & SCF_DIR) == SCF_DIN)
1710                 return 6;       /* wrong direction */
1711
1712         outl(scb->buflen, host->addr + TUL_SCnt0);
1713         outb(TSC_XF_DMA_OUT, host->addr + TUL_SCmd);
1714
1715         if (scb->flags & SCF_SG) {      /* S/G xfer */
1716                 outl(((u32) scb->sglen) << 3, host->addr + TUL_XCntH);
1717                 outl(scb->bufptr, host->addr + TUL_XAddH);
1718                 outb(TAX_SG_OUT, host->addr + TUL_XCmd);
1719         } else {
1720                 outl(scb->buflen, host->addr + TUL_XCntH);
1721                 outl(scb->bufptr, host->addr + TUL_XAddH);
1722                 outb(TAX_X_OUT, host->addr + TUL_XCmd);
1723         }
1724
1725         scb->next_state = 0x5;
1726         return 0;               /* return to OS, wait xfer done , let jas_isr come in */
1727 }
1728
1729 int initio_xpad_in(struct initio_host * host)
1730 {
1731         struct scsi_ctrl_blk *scb = host->active;
1732         struct target_control *active_tc = host->active_tc;
1733
1734         if ((scb->flags & SCF_DIR) != SCF_NO_DCHK)
1735                 scb->hastat = HOST_DO_DU;       /* over run             */
1736         for (;;) {
1737                 if (active_tc->js_period & TSC_WIDE_SCSI)
1738                         outl(2, host->addr + TUL_SCnt0);
1739                 else
1740                         outl(1, host->addr + TUL_SCnt0);
1741
1742                 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
1743                 if (wait_tulip(host) == -1)
1744                         return -1;
1745                 if (host->phase != DATA_IN) {
1746                         outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1747                         return 6;
1748                 }
1749                 inb(host->addr + TUL_SFifo);
1750         }
1751 }
1752
1753 int initio_xpad_out(struct initio_host * host)
1754 {
1755         struct scsi_ctrl_blk *scb = host->active;
1756         struct target_control *active_tc = host->active_tc;
1757
1758         if ((scb->flags & SCF_DIR) != SCF_NO_DCHK)
1759                 scb->hastat = HOST_DO_DU;       /* over run             */
1760         for (;;) {
1761                 if (active_tc->js_period & TSC_WIDE_SCSI)
1762                         outl(2, host->addr + TUL_SCnt0);
1763                 else
1764                         outl(1, host->addr + TUL_SCnt0);
1765
1766                 outb(0, host->addr + TUL_SFifo);
1767                 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1768                 if ((wait_tulip(host)) == -1)
1769                         return -1;
1770                 if (host->phase != DATA_OUT) {  /* Disable wide CPU to allow read 16 bits */
1771                         outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1);
1772                         outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1773                         return 6;
1774                 }
1775         }
1776 }
1777
1778 int initio_status_msg(struct initio_host * host)
1779 {                               /* status & MSG_IN */
1780         struct scsi_ctrl_blk *scb = host->active;
1781         u8 msg;
1782
1783         outb(TSC_CMD_COMP, host->addr + TUL_SCmd);
1784         if (wait_tulip(host) == -1)
1785                 return -1;
1786
1787         /* get status */
1788         scb->tastat = inb(host->addr + TUL_SFifo);
1789
1790         if (host->phase == MSG_OUT) {
1791                 if (host->jsstatus0 & TSS_PAR_ERROR)
1792                         outb(MSG_PARITY_ERROR, host->addr + TUL_SFifo);
1793                 else
1794                         outb(NOP, host->addr + TUL_SFifo);
1795                 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1796                 return wait_tulip(host);
1797         }
1798         if (host->phase == MSG_IN) {
1799                 msg = inb(host->addr + TUL_SFifo);
1800                 if (host->jsstatus0 & TSS_PAR_ERROR) {  /* Parity error                 */
1801                         if ((initio_msgin_accept(host)) == -1)
1802                                 return -1;
1803                         if (host->phase != MSG_OUT)
1804                                 return initio_bad_seq(host);
1805                         outb(MSG_PARITY_ERROR, host->addr + TUL_SFifo);
1806                         outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1807                         return wait_tulip(host);
1808                 }
1809                 if (msg == 0) { /* Command complete             */
1810
1811                         if ((scb->tastat & 0x18) == 0x10)       /* No link support              */
1812                                 return initio_bad_seq(host);
1813                         outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1814                         outb(TSC_MSG_ACCEPT, host->addr + TUL_SCmd);
1815                         return initio_wait_done_disc(host);
1816
1817                 }
1818                 if (msg == LINKED_CMD_COMPLETE ||
1819                     msg == LINKED_FLG_CMD_COMPLETE) {
1820                         if ((scb->tastat & 0x18) == 0x10)
1821                                 return initio_msgin_accept(host);
1822                 }
1823         }
1824         return initio_bad_seq(host);
1825 }
1826
1827
1828 /* scsi bus free */
1829 int int_initio_busfree(struct initio_host * host)
1830 {
1831         struct scsi_ctrl_blk *scb = host->active;
1832
1833         if (scb != NULL) {
1834                 if (scb->status & SCB_SELECT) {         /* selection timeout */
1835                         initio_unlink_pend_scb(host, scb);
1836                         scb->hastat = HOST_SEL_TOUT;
1837                         initio_append_done_scb(host, scb);
1838                 } else {        /* Unexpected bus free          */
1839                         initio_unlink_busy_scb(host, scb);
1840                         scb->hastat = HOST_BUS_FREE;
1841                         initio_append_done_scb(host, scb);
1842                 }
1843                 host->active = NULL;
1844                 host->active_tc = NULL;
1845         }
1846         outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);          /* Flush SCSI FIFO  */
1847         outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
1848         outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect       */
1849         return -1;
1850 }
1851
1852
1853 /**
1854  *      int_initio_scsi_rst     -       SCSI reset occurred
1855  *      @host: Host seeing the reset
1856  *
1857  *      A SCSI bus reset has occurred. Clean up any pending transfer
1858  *      the hardware is doing by DMA and then abort all active and
1859  *      disconnected commands. The mid layer should sort the rest out
1860  *      for us
1861  */
1862
1863 static int int_initio_scsi_rst(struct initio_host * host)
1864 {
1865         struct scsi_ctrl_blk *scb;
1866         int i;
1867
1868         /* if DMA xfer is pending, abort DMA xfer */
1869         if (inb(host->addr + TUL_XStatus) & 0x01) {
1870                 outb(TAX_X_ABT | TAX_X_CLR_FIFO, host->addr + TUL_XCmd);
1871                 /* wait Abort DMA xfer done */
1872                 while ((inb(host->addr + TUL_Int) & 0x04) == 0)
1873                         cpu_relax();
1874                 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1875         }
1876         /* Abort all active & disconnected scb */
1877         while ((scb = initio_pop_busy_scb(host)) != NULL) {
1878                 scb->hastat = HOST_BAD_PHAS;
1879                 initio_append_done_scb(host, scb);
1880         }
1881         host->active = NULL;
1882         host->active_tc = NULL;
1883
1884         /* clr sync nego. done flag */
1885         for (i = 0; i < host->max_tar; i++)
1886                 host->targets[i].flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
1887         return -1;
1888 }
1889
1890 /**
1891  *      int_initio_scsi_resel   -       Reselection occurred
1892  *      @host: InitIO host adapter
1893  *
1894  *      A SCSI reselection event has been signalled and the interrupt
1895  *      is now being processed. Work out which command block needs attention
1896  *      and continue processing that command.
1897  */
1898
1899 int int_initio_resel(struct initio_host * host)
1900 {
1901         struct scsi_ctrl_blk *scb;
1902         struct target_control *active_tc;
1903         u8 tag, msg = 0;
1904         u8 tar, lun;
1905
1906         if ((scb = host->active) != NULL) {
1907                 /* FIXME: Why check and not just clear ? */
1908                 if (scb->status & SCB_SELECT)           /* if waiting for selection complete */
1909                         scb->status &= ~SCB_SELECT;
1910                 host->active = NULL;
1911         }
1912         /* --------- get target id---------------------- */
1913         tar = inb(host->addr + TUL_SBusId);
1914         /* ------ get LUN from Identify message----------- */
1915         lun = inb(host->addr + TUL_SIdent) & 0x0F;
1916         /* 07/22/98 from 0x1F -> 0x0F */
1917         active_tc = &host->targets[tar];
1918         host->active_tc = active_tc;
1919         outb(active_tc->sconfig0, host->addr + TUL_SConfig);
1920         outb(active_tc->js_period, host->addr + TUL_SPeriod);
1921
1922         /* ------------- tag queueing ? ------------------- */
1923         if (active_tc->drv_flags & TCF_DRV_EN_TAG) {
1924                 if ((initio_msgin_accept(host)) == -1)
1925                         return -1;
1926                 if (host->phase != MSG_IN)
1927                         goto no_tag;
1928                 outl(1, host->addr + TUL_SCnt0);
1929                 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
1930                 if (wait_tulip(host) == -1)
1931                         return -1;
1932                 msg = inb(host->addr + TUL_SFifo);      /* Read Tag Message    */
1933
1934                 if (msg < SIMPLE_QUEUE_TAG || msg > ORDERED_QUEUE_TAG)
1935                         /* Is simple Tag      */
1936                         goto no_tag;
1937
1938                 if (initio_msgin_accept(host) == -1)
1939                         return -1;
1940
1941                 if (host->phase != MSG_IN)
1942                         goto no_tag;
1943
1944                 outl(1, host->addr + TUL_SCnt0);
1945                 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
1946                 if (wait_tulip(host) == -1)
1947                         return -1;
1948                 tag = inb(host->addr + TUL_SFifo);      /* Read Tag ID       */
1949                 scb = host->scb + tag;
1950                 if (scb->target != tar || scb->lun != lun) {
1951                         return initio_msgout_abort_tag(host);
1952                 }
1953                 if (scb->status != SCB_BUSY) {  /* 03/24/95             */
1954                         return initio_msgout_abort_tag(host);
1955                 }
1956                 host->active = scb;
1957                 if ((initio_msgin_accept(host)) == -1)
1958                         return -1;
1959         } else {                /* No tag               */
1960               no_tag:
1961                 if ((scb = initio_find_busy_scb(host, tar | (lun << 8))) == NULL) {
1962                         return initio_msgout_abort_targ(host);
1963                 }
1964                 host->active = scb;
1965                 if (!(active_tc->drv_flags & TCF_DRV_EN_TAG)) {
1966                         if ((initio_msgin_accept(host)) == -1)
1967                                 return -1;
1968                 }
1969         }
1970         return 0;
1971 }
1972
1973 /**
1974  *      int_initio_bad_seq              -       out of phase
1975  *      @host: InitIO host flagging event
1976  *
1977  *      We have ended up out of phase somehow. Reset the host controller
1978  *      and throw all our toys out of the pram. Let the midlayer clean up
1979  */
1980
1981 static int int_initio_bad_seq(struct initio_host * host)
1982 {                               /* target wrong phase           */
1983         struct scsi_ctrl_blk *scb;
1984         int i;
1985
1986         initio_reset_scsi(host, 10);
1987
1988         while ((scb = initio_pop_busy_scb(host)) != NULL) {
1989                 scb->hastat = HOST_BAD_PHAS;
1990                 initio_append_done_scb(host, scb);
1991         }
1992         for (i = 0; i < host->max_tar; i++)
1993                 host->targets[i].flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
1994         return -1;
1995 }
1996
1997
1998 /**
1999  *      initio_msgout_abort_targ                -       abort a tag
2000  *      @host: InitIO host
2001  *
2002  *      Abort when the target/lun does not match or when our SCB is not
2003  *      busy. Used by untagged commands.
2004  */
2005
2006 static int initio_msgout_abort_targ(struct initio_host * host)
2007 {
2008
2009         outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
2010         if (initio_msgin_accept(host) == -1)
2011                 return -1;
2012         if (host->phase != MSG_OUT)
2013                 return initio_bad_seq(host);
2014
2015         outb(ABORT_TASK_SET, host->addr + TUL_SFifo);
2016         outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2017
2018         return initio_wait_disc(host);
2019 }
2020
2021 /**
2022  *      initio_msgout_abort_tag         -       abort a tag
2023  *      @host: InitIO host
2024  *
2025  *      Abort when the target/lun does not match or when our SCB is not
2026  *      busy. Used for tagged commands.
2027  */
2028
2029 static int initio_msgout_abort_tag(struct initio_host * host)
2030 {
2031
2032         outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
2033         if (initio_msgin_accept(host) == -1)
2034                 return -1;
2035         if (host->phase != MSG_OUT)
2036                 return initio_bad_seq(host);
2037
2038         outb(ABORT_TASK, host->addr + TUL_SFifo);
2039         outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2040
2041         return initio_wait_disc(host);
2042
2043 }
2044
2045 /**
2046  *      initio_msgin            -       Message in
2047  *      @host: InitIO Host
2048  *
2049  *      Process incoming message
2050  */
2051 static int initio_msgin(struct initio_host * host)
2052 {
2053         struct target_control *active_tc;
2054
2055         for (;;) {
2056                 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
2057
2058                 outl(1, host->addr + TUL_SCnt0);
2059                 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
2060                 if (wait_tulip(host) == -1)
2061                         return -1;
2062
2063                 switch (inb(host->addr + TUL_SFifo)) {
2064                 case DISCONNECT:        /* Disconnect msg */
2065                         outb(TSC_MSG_ACCEPT, host->addr + TUL_SCmd);
2066                         return initio_wait_disc(host);
2067                 case SAVE_POINTERS:
2068                 case RESTORE_POINTERS:
2069                 case NOP:
2070                         initio_msgin_accept(host);
2071                         break;
2072                 case MESSAGE_REJECT:    /* Clear ATN first              */
2073                         outb((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)),
2074                                 host->addr + TUL_SSignal);
2075                         active_tc = host->active_tc;
2076                         if ((active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0)       /* do sync nego */
2077                                 outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN),
2078                                         host->addr + TUL_SSignal);
2079                         initio_msgin_accept(host);
2080                         break;
2081                 case EXTENDED_MESSAGE:  /* extended msg */
2082                         initio_msgin_extend(host);
2083                         break;
2084                 case IGNORE_WIDE_RESIDUE:
2085                         initio_msgin_accept(host);
2086                         break;
2087                 case COMMAND_COMPLETE:
2088                         outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
2089                         outb(TSC_MSG_ACCEPT, host->addr + TUL_SCmd);
2090                         return initio_wait_done_disc(host);
2091                 default:
2092                         initio_msgout_reject(host);
2093                         break;
2094                 }
2095                 if (host->phase != MSG_IN)
2096                         return host->phase;
2097         }
2098         /* statement won't reach here */
2099 }
2100
2101 static int initio_msgout_reject(struct initio_host * host)
2102 {
2103         outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
2104
2105         if (initio_msgin_accept(host) == -1)
2106                 return -1;
2107
2108         if (host->phase == MSG_OUT) {
2109                 outb(MESSAGE_REJECT, host->addr + TUL_SFifo);           /* Msg reject           */
2110                 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2111                 return wait_tulip(host);
2112         }
2113         return host->phase;
2114 }
2115
2116 static int initio_msgout_ide(struct initio_host * host)
2117 {
2118         outb(INITIATOR_ERROR, host->addr + TUL_SFifo);          /* Initiator Detected Error */
2119         outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2120         return wait_tulip(host);
2121 }
2122
2123 static int initio_msgin_extend(struct initio_host * host)
2124 {
2125         u8 len, idx;
2126
2127         if (initio_msgin_accept(host) != MSG_IN)
2128                 return host->phase;
2129
2130         /* Get extended msg length      */
2131         outl(1, host->addr + TUL_SCnt0);
2132         outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
2133         if (wait_tulip(host) == -1)
2134                 return -1;
2135
2136         len = inb(host->addr + TUL_SFifo);
2137         host->msg[0] = len;
2138         for (idx = 1; len != 0; len--) {
2139
2140                 if ((initio_msgin_accept(host)) != MSG_IN)
2141                         return host->phase;
2142                 outl(1, host->addr + TUL_SCnt0);
2143                 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
2144                 if (wait_tulip(host) == -1)
2145                         return -1;
2146                 host->msg[idx++] = inb(host->addr + TUL_SFifo);
2147         }
2148         if (host->msg[1] == 1) {                /* if it's synchronous data transfer request */
2149                 u8 r;
2150                 if (host->msg[0] != 3)  /* if length is not right */
2151                         return initio_msgout_reject(host);
2152                 if (host->active_tc->flags & TCF_NO_SYNC_NEGO) {        /* Set OFFSET=0 to do async, nego back */
2153                         host->msg[3] = 0;
2154                 } else {
2155                         if (initio_msgin_sync(host) == 0 &&
2156                             (host->active_tc->flags & TCF_SYNC_DONE)) {
2157                                 initio_sync_done(host);
2158                                 return initio_msgin_accept(host);
2159                         }
2160                 }
2161
2162                 r = inb(host->addr + TUL_SSignal);
2163                 outb((r & (TSC_SET_ACK | 7)) | TSC_SET_ATN,
2164                         host->addr + TUL_SSignal);
2165                 if (initio_msgin_accept(host) != MSG_OUT)
2166                         return host->phase;
2167                 /* sync msg out */
2168                 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
2169
2170                 initio_sync_done(host);
2171
2172                 outb(EXTENDED_MESSAGE, host->addr + TUL_SFifo);
2173                 outb(3, host->addr + TUL_SFifo);
2174                 outb(EXTENDED_SDTR, host->addr + TUL_SFifo);
2175                 outb(host->msg[2], host->addr + TUL_SFifo);
2176                 outb(host->msg[3], host->addr + TUL_SFifo);
2177                 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2178                 return wait_tulip(host);
2179         }
2180         if (host->msg[0] != 2 || host->msg[1] != 3)
2181                 return initio_msgout_reject(host);
2182         /* if it's WIDE DATA XFER REQ   */
2183         if (host->active_tc->flags & TCF_NO_WDTR) {
2184                 host->msg[2] = 0;
2185         } else {
2186                 if (host->msg[2] > 2)   /* > 32 bits            */
2187                         return initio_msgout_reject(host);
2188                 if (host->msg[2] == 2) {                /* == 32                */
2189                         host->msg[2] = 1;
2190                 } else {
2191                         if ((host->active_tc->flags & TCF_NO_WDTR) == 0) {
2192                                 wdtr_done(host);
2193                                 if ((host->active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0)
2194                                         outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
2195                                 return initio_msgin_accept(host);
2196                         }
2197                 }
2198         }
2199         outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
2200
2201         if (initio_msgin_accept(host) != MSG_OUT)
2202                 return host->phase;
2203         /* WDTR msg out                 */
2204         outb(EXTENDED_MESSAGE, host->addr + TUL_SFifo);
2205         outb(2, host->addr + TUL_SFifo);
2206         outb(EXTENDED_WDTR, host->addr + TUL_SFifo);
2207         outb(host->msg[2], host->addr + TUL_SFifo);
2208         outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2209         return wait_tulip(host);
2210 }
2211
2212 static int initio_msgin_sync(struct initio_host * host)
2213 {
2214         char default_period;
2215
2216         default_period = initio_rate_tbl[host->active_tc->flags & TCF_SCSI_RATE];
2217         if (host->msg[3] > MAX_OFFSET) {
2218                 host->msg[3] = MAX_OFFSET;
2219                 if (host->msg[2] < default_period) {
2220                         host->msg[2] = default_period;
2221                         return 1;
2222                 }
2223                 if (host->msg[2] >= 59) /* Change to async              */
2224                         host->msg[3] = 0;
2225                 return 1;
2226         }
2227         /* offset requests asynchronous transfers ? */
2228         if (host->msg[3] == 0) {
2229                 return 0;
2230         }
2231         if (host->msg[2] < default_period) {
2232                 host->msg[2] = default_period;
2233                 return 1;
2234         }
2235         if (host->msg[2] >= 59) {
2236                 host->msg[3] = 0;
2237                 return 1;
2238         }
2239         return 0;
2240 }
2241
2242 static int wdtr_done(struct initio_host * host)
2243 {
2244         host->active_tc->flags &= ~TCF_SYNC_DONE;
2245         host->active_tc->flags |= TCF_WDTR_DONE;
2246
2247         host->active_tc->js_period = 0;
2248         if (host->msg[2])       /* if 16 bit */
2249                 host->active_tc->js_period |= TSC_WIDE_SCSI;
2250         host->active_tc->sconfig0 &= ~TSC_ALT_PERIOD;
2251         outb(host->active_tc->sconfig0, host->addr + TUL_SConfig);
2252         outb(host->active_tc->js_period, host->addr + TUL_SPeriod);
2253
2254         return 1;
2255 }
2256
2257 static int initio_sync_done(struct initio_host * host)
2258 {
2259         int i;
2260
2261         host->active_tc->flags |= TCF_SYNC_DONE;
2262
2263         if (host->msg[3]) {
2264                 host->active_tc->js_period |= host->msg[3];
2265                 for (i = 0; i < 8; i++) {
2266                         if (initio_rate_tbl[i] >= host->msg[2]) /* pick the big one */
2267                                 break;
2268                 }
2269                 host->active_tc->js_period |= (i << 4);
2270                 host->active_tc->sconfig0 |= TSC_ALT_PERIOD;
2271         }
2272         outb(host->active_tc->sconfig0, host->addr + TUL_SConfig);
2273         outb(host->active_tc->js_period, host->addr + TUL_SPeriod);
2274
2275         return -1;
2276 }
2277
2278
2279 static int initio_post_scsi_rst(struct initio_host * host)
2280 {
2281         struct scsi_ctrl_blk *scb;
2282         struct target_control *active_tc;
2283         int i;
2284
2285         host->active = NULL;
2286         host->active_tc = NULL;
2287         host->flags = 0;
2288
2289         while ((scb = initio_pop_busy_scb(host)) != NULL) {
2290                 scb->hastat = HOST_BAD_PHAS;
2291                 initio_append_done_scb(host, scb);
2292         }
2293         /* clear sync done flag         */
2294         active_tc = &host->targets[0];
2295         for (i = 0; i < host->max_tar; active_tc++, i++) {
2296                 active_tc->flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
2297                 /* Initialize the sync. xfer register values to an asyn xfer */
2298                 active_tc->js_period = 0;
2299                 active_tc->sconfig0 = host->sconf1;
2300                 host->act_tags[0] = 0;  /* 07/22/98 */
2301                 host->targets[i].flags &= ~TCF_BUSY;    /* 07/22/98 */
2302         }                       /* for */
2303
2304         return -1;
2305 }
2306
2307 static void initio_select_atn_stop(struct initio_host * host, struct scsi_ctrl_blk * scb)
2308 {
2309         scb->status |= SCB_SELECT;
2310         scb->next_state = 0x1;
2311         host->active = scb;
2312         host->active_tc = &host->targets[scb->target];
2313         outb(TSC_SELATNSTOP, host->addr + TUL_SCmd);
2314 }
2315
2316
2317 static void initio_select_atn(struct initio_host * host, struct scsi_ctrl_blk * scb)
2318 {
2319         int i;
2320
2321         scb->status |= SCB_SELECT;
2322         scb->next_state = 0x2;
2323
2324         outb(scb->ident, host->addr + TUL_SFifo);
2325         for (i = 0; i < (int) scb->cdblen; i++)
2326                 outb(scb->cdb[i], host->addr + TUL_SFifo);
2327         host->active_tc = &host->targets[scb->target];
2328         host->active = scb;
2329         outb(TSC_SEL_ATN, host->addr + TUL_SCmd);
2330 }
2331
2332 static void initio_select_atn3(struct initio_host * host, struct scsi_ctrl_blk * scb)
2333 {
2334         int i;
2335
2336         scb->status |= SCB_SELECT;
2337         scb->next_state = 0x2;
2338
2339         outb(scb->ident, host->addr + TUL_SFifo);
2340         outb(scb->tagmsg, host->addr + TUL_SFifo);
2341         outb(scb->tagid, host->addr + TUL_SFifo);
2342         for (i = 0; i < scb->cdblen; i++)
2343                 outb(scb->cdb[i], host->addr + TUL_SFifo);
2344         host->active_tc = &host->targets[scb->target];
2345         host->active = scb;
2346         outb(TSC_SEL_ATN3, host->addr + TUL_SCmd);
2347 }
2348
2349 /**
2350  *      initio_bus_device_reset -        SCSI Bus Device Reset
2351  *      @host: InitIO host to reset
2352  *
2353  *      Perform a device reset and abort all pending SCBs for the
2354  *      victim device
2355  */
2356 int initio_bus_device_reset(struct initio_host * host)
2357 {
2358         struct scsi_ctrl_blk *scb = host->active;
2359         struct target_control *active_tc = host->active_tc;
2360         struct scsi_ctrl_blk *tmp, *prev;
2361         u8 tar;
2362
2363         if (host->phase != MSG_OUT)
2364                 return int_initio_bad_seq(host);        /* Unexpected phase */
2365
2366         initio_unlink_pend_scb(host, scb);
2367         initio_release_scb(host, scb);
2368
2369
2370         tar = scb->target;      /* target                       */
2371         active_tc->flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE | TCF_BUSY);
2372         /* clr sync. nego & WDTR flags  07/22/98 */
2373
2374         /* abort all SCB with same target */
2375         prev = tmp = host->first_busy;  /* Check Busy queue */
2376         while (tmp != NULL) {
2377                 if (tmp->target == tar) {
2378                         /* unlink it */
2379                         if (tmp == host->first_busy) {
2380                                 if ((host->first_busy = tmp->next) == NULL)
2381                                         host->last_busy = NULL;
2382                         } else {
2383                                 prev->next = tmp->next;
2384                                 if (tmp == host->last_busy)
2385                                         host->last_busy = prev;
2386                         }
2387                         tmp->hastat = HOST_ABORTED;
2388                         initio_append_done_scb(host, tmp);
2389                 }
2390                 /* Previous haven't change      */
2391                 else {
2392                         prev = tmp;
2393                 }
2394                 tmp = tmp->next;
2395         }
2396         outb(TARGET_RESET, host->addr + TUL_SFifo);
2397         outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2398         return initio_wait_disc(host);
2399
2400 }
2401
2402 static int initio_msgin_accept(struct initio_host * host)
2403 {
2404         outb(TSC_MSG_ACCEPT, host->addr + TUL_SCmd);
2405         return wait_tulip(host);
2406 }
2407
2408 static int wait_tulip(struct initio_host * host)
2409 {
2410
2411         while (!((host->jsstatus0 = inb(host->addr + TUL_SStatus0))
2412                  & TSS_INT_PENDING))
2413                         cpu_relax();
2414
2415         host->jsint = inb(host->addr + TUL_SInt);
2416         host->phase = host->jsstatus0 & TSS_PH_MASK;
2417         host->jsstatus1 = inb(host->addr + TUL_SStatus1);
2418
2419         if (host->jsint & TSS_RESEL_INT)        /* if SCSI bus reset detected */
2420                 return int_initio_resel(host);
2421         if (host->jsint & TSS_SEL_TIMEOUT)      /* if selected/reselected timeout interrupt */
2422                 return int_initio_busfree(host);
2423         if (host->jsint & TSS_SCSIRST_INT)      /* if SCSI bus reset detected   */
2424                 return int_initio_scsi_rst(host);
2425
2426         if (host->jsint & TSS_DISC_INT) {       /* BUS disconnection            */
2427                 if (host->flags & HCF_EXPECT_DONE_DISC) {
2428                         outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */
2429                         initio_unlink_busy_scb(host, host->active);
2430                         host->active->hastat = 0;
2431                         initio_append_done_scb(host, host->active);
2432                         host->active = NULL;
2433                         host->active_tc = NULL;
2434                         host->flags &= ~HCF_EXPECT_DONE_DISC;
2435                         outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
2436                         outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */
2437                         return -1;
2438                 }
2439                 if (host->flags & HCF_EXPECT_DISC) {
2440                         outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */
2441                         host->active = NULL;
2442                         host->active_tc = NULL;
2443                         host->flags &= ~HCF_EXPECT_DISC;
2444                         outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
2445                         outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */
2446                         return -1;
2447                 }
2448                 return int_initio_busfree(host);
2449         }
2450         /* The old code really does the below. Can probably be removed */
2451         if (host->jsint & (TSS_FUNC_COMP | TSS_BUS_SERV))
2452                 return host->phase;
2453         return host->phase;
2454 }
2455
2456 static int initio_wait_disc(struct initio_host * host)
2457 {
2458         while (!((host->jsstatus0 = inb(host->addr + TUL_SStatus0)) & TSS_INT_PENDING))
2459                 cpu_relax();
2460
2461         host->jsint = inb(host->addr + TUL_SInt);
2462
2463         if (host->jsint & TSS_SCSIRST_INT)      /* if SCSI bus reset detected */
2464                 return int_initio_scsi_rst(host);
2465         if (host->jsint & TSS_DISC_INT) {       /* BUS disconnection */
2466                 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */
2467                 outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
2468                 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */
2469                 host->active = NULL;
2470                 return -1;
2471         }
2472         return initio_bad_seq(host);
2473 }
2474
2475 static int initio_wait_done_disc(struct initio_host * host)
2476 {
2477         while (!((host->jsstatus0 = inb(host->addr + TUL_SStatus0))
2478                  & TSS_INT_PENDING))
2479                  cpu_relax();
2480
2481         host->jsint = inb(host->addr + TUL_SInt);
2482
2483         if (host->jsint & TSS_SCSIRST_INT)      /* if SCSI bus reset detected */
2484                 return int_initio_scsi_rst(host);
2485         if (host->jsint & TSS_DISC_INT) {       /* BUS disconnection */
2486                 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);          /* Flush SCSI FIFO */
2487                 outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
2488                 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1);         /* Enable HW reselect */
2489                 initio_unlink_busy_scb(host, host->active);
2490
2491                 initio_append_done_scb(host, host->active);
2492                 host->active = NULL;
2493                 return -1;
2494         }
2495         return initio_bad_seq(host);
2496 }
2497
2498 /**
2499  *      i91u_intr               -       IRQ handler
2500  *      @irqno: IRQ number
2501  *      @dev_id: IRQ identifier
2502  *
2503  *      Take the relevant locks and then invoke the actual isr processing
2504  *      code under the lock.
2505  */
2506
2507 static irqreturn_t i91u_intr(int irqno, void *dev_id)
2508 {
2509         struct Scsi_Host *dev = dev_id;
2510         unsigned long flags;
2511         int r;
2512
2513         spin_lock_irqsave(dev->host_lock, flags);
2514         r = initio_isr((struct initio_host *)dev->hostdata);
2515         spin_unlock_irqrestore(dev->host_lock, flags);
2516         if (r)
2517                 return IRQ_HANDLED;
2518         else
2519                 return IRQ_NONE;
2520 }
2521
2522
2523 /**
2524  *      initio_build_scb                -       Build the mappings and SCB
2525  *      @host: InitIO host taking the command
2526  *      @cblk: Firmware command block
2527  *      @cmnd: SCSI midlayer command block
2528  *
2529  *      Translate the abstract SCSI command into a firmware command block
2530  *      suitable for feeding to the InitIO host controller. This also requires
2531  *      we build the scatter gather lists and ensure they are mapped properly.
2532  */
2533
2534 static void initio_build_scb(struct initio_host * host, struct scsi_ctrl_blk * cblk, struct scsi_cmnd * cmnd)
2535 {                               /* Create corresponding SCB     */
2536         struct scatterlist *sglist;
2537         struct sg_entry *sg;            /* Pointer to SG list           */
2538         int i, nseg;
2539         long total_len;
2540         dma_addr_t dma_addr;
2541
2542         /* Fill in the command headers */
2543         cblk->post = i91uSCBPost;       /* i91u's callback routine      */
2544         cblk->srb = cmnd;
2545         cblk->opcode = ExecSCSI;
2546         cblk->flags = SCF_POST; /* After SCSI done, call post routine */
2547         cblk->target = cmnd->device->id;
2548         cblk->lun = cmnd->device->lun;
2549         cblk->ident = cmnd->device->lun | DISC_ALLOW;
2550
2551         cblk->flags |= SCF_SENSE;       /* Turn on auto request sense   */
2552
2553         /* Map the sense buffer into bus memory */
2554         dma_addr = dma_map_single(&host->pci_dev->dev, cmnd->sense_buffer,
2555                                   SENSE_SIZE, DMA_FROM_DEVICE);
2556         cblk->senseptr = (u32)dma_addr;
2557         cblk->senselen = SENSE_SIZE;
2558         cmnd->SCp.ptr = (char *)(unsigned long)dma_addr;
2559         cblk->cdblen = cmnd->cmd_len;
2560
2561         /* Clear the returned status */
2562         cblk->hastat = 0;
2563         cblk->tastat = 0;
2564         /* Command the command */
2565         memcpy(cblk->cdb, cmnd->cmnd, cmnd->cmd_len);
2566
2567         /* Set up tags */
2568         if (cmnd->device->tagged_supported) {   /* Tag Support                  */
2569                 cblk->tagmsg = SIMPLE_QUEUE_TAG;        /* Do simple tag only   */
2570         } else {
2571                 cblk->tagmsg = 0;       /* No tag support               */
2572         }
2573
2574         /* todo handle map_sg error */
2575         nseg = scsi_dma_map(cmnd);
2576         BUG_ON(nseg < 0);
2577         if (nseg) {
2578                 dma_addr = dma_map_single(&host->pci_dev->dev, &cblk->sglist[0],
2579                                           sizeof(struct sg_entry) * TOTAL_SG_ENTRY,
2580                                           DMA_BIDIRECTIONAL);
2581                 cblk->bufptr = (u32)dma_addr;
2582                 cmnd->SCp.dma_handle = dma_addr;
2583
2584                 cblk->sglen = nseg;
2585
2586                 cblk->flags |= SCF_SG;  /* Turn on SG list flag       */
2587                 total_len = 0;
2588                 sg = &cblk->sglist[0];
2589                 scsi_for_each_sg(cmnd, sglist, cblk->sglen, i) {
2590                         sg->data = cpu_to_le32((u32)sg_dma_address(sglist));
2591                         sg->len = cpu_to_le32((u32)sg_dma_len(sglist));
2592                         total_len += sg_dma_len(sglist);
2593                         ++sg;
2594                 }
2595
2596                 cblk->buflen = (scsi_bufflen(cmnd) > total_len) ?
2597                         total_len : scsi_bufflen(cmnd);
2598         } else {        /* No data transfer required */
2599                 cblk->buflen = 0;
2600                 cblk->sglen = 0;
2601         }
2602 }
2603
2604 /**
2605  *      i91u_queuecommand       -       Queue a new command if possible
2606  *      @cmd: SCSI command block from the mid layer
2607  *      @done: Completion handler
2608  *
2609  *      Attempts to queue a new command with the host adapter. Will return
2610  *      zero if successful or indicate a host busy condition if not (which
2611  *      will cause the mid layer to call us again later with the command)
2612  */
2613
2614 static int i91u_queuecommand_lck(struct scsi_cmnd *cmd,
2615                 void (*done)(struct scsi_cmnd *))
2616 {
2617         struct initio_host *host = (struct initio_host *) cmd->device->host->hostdata;
2618         struct scsi_ctrl_blk *cmnd;
2619
2620         cmd->scsi_done = done;
2621
2622         cmnd = initio_alloc_scb(host);
2623         if (!cmnd)
2624                 return SCSI_MLQUEUE_HOST_BUSY;
2625
2626         initio_build_scb(host, cmnd, cmd);
2627         initio_exec_scb(host, cmnd);
2628         return 0;
2629 }
2630
2631 static DEF_SCSI_QCMD(i91u_queuecommand)
2632
2633 /**
2634  *      i91u_bus_reset          -       reset the SCSI bus
2635  *      @cmnd: Command block we want to trigger the reset for
2636  *
2637  *      Initiate a SCSI bus reset sequence
2638  */
2639
2640 static int i91u_bus_reset(struct scsi_cmnd * cmnd)
2641 {
2642         struct initio_host *host;
2643
2644         host = (struct initio_host *) cmnd->device->host->hostdata;
2645
2646         spin_lock_irq(cmnd->device->host->host_lock);
2647         initio_reset_scsi(host, 0);
2648         spin_unlock_irq(cmnd->device->host->host_lock);
2649
2650         return SUCCESS;
2651 }
2652
2653 /**
2654  *      i91u_biospararm                 -       return the "logical geometry
2655  *      @sdev: SCSI device
2656  *      @dev; Matching block device
2657  *      @capacity: Sector size of drive
2658  *      @info_array: Return space for BIOS geometry
2659  *
2660  *      Map the device geometry in a manner compatible with the host
2661  *      controller BIOS behaviour.
2662  *
2663  *      FIXME: limited to 2^32 sector devices.
2664  */
2665
2666 static int i91u_biosparam(struct scsi_device *sdev, struct block_device *dev,
2667                 sector_t capacity, int *info_array)
2668 {
2669         struct initio_host *host;               /* Point to Host adapter control block */
2670         struct target_control *tc;
2671
2672         host = (struct initio_host *) sdev->host->hostdata;
2673         tc = &host->targets[sdev->id];
2674
2675         if (tc->heads) {
2676                 info_array[0] = tc->heads;
2677                 info_array[1] = tc->sectors;
2678                 info_array[2] = (unsigned long)capacity / tc->heads / tc->sectors;
2679         } else {
2680                 if (tc->drv_flags & TCF_DRV_255_63) {
2681                         info_array[0] = 255;
2682                         info_array[1] = 63;
2683                         info_array[2] = (unsigned long)capacity / 255 / 63;
2684                 } else {
2685                         info_array[0] = 64;
2686                         info_array[1] = 32;
2687                         info_array[2] = (unsigned long)capacity >> 11;
2688                 }
2689         }
2690
2691 #if defined(DEBUG_BIOSPARAM)
2692         if (i91u_debug & debug_biosparam) {
2693                 printk("bios geometry: head=%d, sec=%d, cyl=%d\n",
2694                        info_array[0], info_array[1], info_array[2]);
2695                 printk("WARNING: check, if the bios geometry is correct.\n");
2696         }
2697 #endif
2698
2699         return 0;
2700 }
2701
2702 /**
2703  *      i91u_unmap_scb          -       Unmap a command
2704  *      @pci_dev: PCI device the command is for
2705  *      @cmnd: The command itself
2706  *
2707  *      Unmap any PCI mapping/IOMMU resources allocated when the command
2708  *      was mapped originally as part of initio_build_scb
2709  */
2710
2711 static void i91u_unmap_scb(struct pci_dev *pci_dev, struct scsi_cmnd *cmnd)
2712 {
2713         /* auto sense buffer */
2714         if (cmnd->SCp.ptr) {
2715                 dma_unmap_single(&pci_dev->dev,
2716                                  (dma_addr_t)((unsigned long)cmnd->SCp.ptr),
2717                                  SENSE_SIZE, DMA_FROM_DEVICE);
2718                 cmnd->SCp.ptr = NULL;
2719         }
2720
2721         /* request buffer */
2722         if (scsi_sg_count(cmnd)) {
2723                 dma_unmap_single(&pci_dev->dev, cmnd->SCp.dma_handle,
2724                                  sizeof(struct sg_entry) * TOTAL_SG_ENTRY,
2725                                  DMA_BIDIRECTIONAL);
2726
2727                 scsi_dma_unmap(cmnd);
2728         }
2729 }
2730
2731 /**
2732  *      i91uSCBPost             -       SCSI callback
2733  *      @host: Pointer to host adapter control block.
2734  *      @cmnd: Pointer to SCSI control block.
2735  *
2736  *      This is callback routine be called when tulip finish one
2737  *      SCSI command.
2738  */
2739
2740 static void i91uSCBPost(u8 * host_mem, u8 * cblk_mem)
2741 {
2742         struct scsi_cmnd *cmnd; /* Pointer to SCSI request block */
2743         struct initio_host *host;
2744         struct scsi_ctrl_blk *cblk;
2745
2746         host = (struct initio_host *) host_mem;
2747         cblk = (struct scsi_ctrl_blk *) cblk_mem;
2748         if ((cmnd = cblk->srb) == NULL) {
2749                 printk(KERN_ERR "i91uSCBPost: SRB pointer is empty\n");
2750                 WARN_ON(1);
2751                 initio_release_scb(host, cblk); /* Release SCB for current channel */
2752                 return;
2753         }
2754
2755         /*
2756          *      Remap the firmware error status into a mid layer one
2757          */
2758         switch (cblk->hastat) {
2759         case 0x0:
2760         case 0xa:               /* Linked command complete without error and linked normally */
2761         case 0xb:               /* Linked command complete without error interrupt generated */
2762                 cblk->hastat = 0;
2763                 break;
2764
2765         case 0x11:              /* Selection time out-The initiator selection or target
2766                                    reselection was not complete within the SCSI Time out period */
2767                 cblk->hastat = DID_TIME_OUT;
2768                 break;
2769
2770         case 0x14:              /* Target bus phase sequence failure-An invalid bus phase or bus
2771                                    phase sequence was requested by the target. The host adapter
2772                                    will generate a SCSI Reset Condition, notifying the host with
2773                                    a SCRD interrupt */
2774                 cblk->hastat = DID_RESET;
2775                 break;
2776
2777         case 0x1a:              /* SCB Aborted. 07/21/98 */
2778                 cblk->hastat = DID_ABORT;
2779                 break;
2780
2781         case 0x12:              /* Data overrun/underrun-The target attempted to transfer more data
2782                                    than was allocated by the Data Length field or the sum of the
2783                                    Scatter / Gather Data Length fields. */
2784         case 0x13:              /* Unexpected bus free-The target dropped the SCSI BSY at an unexpected time. */
2785         case 0x16:              /* Invalid SCB Operation Code. */
2786
2787         default:
2788                 printk("ini9100u: %x %x\n", cblk->hastat, cblk->tastat);
2789                 cblk->hastat = DID_ERROR;       /* Couldn't find any better */
2790                 break;
2791         }
2792
2793         cmnd->result = cblk->tastat | (cblk->hastat << 16);
2794         i91u_unmap_scb(host->pci_dev, cmnd);
2795         cmnd->scsi_done(cmnd);  /* Notify system DONE           */
2796         initio_release_scb(host, cblk); /* Release SCB for current channel */
2797 }
2798
2799 static struct scsi_host_template initio_template = {
2800         .proc_name              = "INI9100U",
2801         .name                   = "Initio INI-9X00U/UW SCSI device driver",
2802         .queuecommand           = i91u_queuecommand,
2803         .eh_bus_reset_handler   = i91u_bus_reset,
2804         .bios_param             = i91u_biosparam,
2805         .can_queue              = MAX_TARGETS * i91u_MAXQUEUE,
2806         .this_id                = 1,
2807         .sg_tablesize           = SG_ALL,
2808 };
2809
2810 static int initio_probe_one(struct pci_dev *pdev,
2811         const struct pci_device_id *id)
2812 {
2813         struct Scsi_Host *shost;
2814         struct initio_host *host;
2815         u32 reg;
2816         u16 bios_seg;
2817         struct scsi_ctrl_blk *scb, *tmp, *prev = NULL /* silence gcc */;
2818         int num_scb, i, error;
2819
2820         error = pci_enable_device(pdev);
2821         if (error)
2822                 return error;
2823
2824         pci_read_config_dword(pdev, 0x44, (u32 *) & reg);
2825         bios_seg = (u16) (reg & 0xFF);
2826         if (((reg & 0xFF00) >> 8) == 0xFF)
2827                 reg = 0;
2828         bios_seg = (bios_seg << 8) + ((u16) ((reg & 0xFF00) >> 8));
2829
2830         if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(32))) {
2831                 printk(KERN_WARNING  "i91u: Could not set 32 bit DMA mask\n");
2832                 error = -ENODEV;
2833                 goto out_disable_device;
2834         }
2835         shost = scsi_host_alloc(&initio_template, sizeof(struct initio_host));
2836         if (!shost) {
2837                 printk(KERN_WARNING "initio: Could not allocate host structure.\n");
2838                 error = -ENOMEM;
2839                 goto out_disable_device;
2840         }
2841         host = (struct initio_host *)shost->hostdata;
2842         memset(host, 0, sizeof(struct initio_host));
2843         host->addr = pci_resource_start(pdev, 0);
2844         host->bios_addr = bios_seg;
2845
2846         if (!request_region(host->addr, 256, "i91u")) {
2847                 printk(KERN_WARNING "initio: I/O port range 0x%x is busy.\n", host->addr);
2848                 error = -ENODEV;
2849                 goto out_host_put;
2850         }
2851
2852         if (initio_tag_enable)  /* 1.01i */
2853                 num_scb = MAX_TARGETS * i91u_MAXQUEUE;
2854         else
2855                 num_scb = MAX_TARGETS + 3;      /* 1-tape, 1-CD_ROM, 1- extra */
2856
2857         for (; num_scb >= MAX_TARGETS + 3; num_scb--) {
2858                 i = num_scb * sizeof(struct scsi_ctrl_blk);
2859                 if ((scb = kzalloc(i, GFP_DMA)) != NULL)
2860                         break;
2861         }
2862
2863         if (!scb) {
2864                 printk(KERN_WARNING "initio: Cannot allocate SCB array.\n");
2865                 error = -ENOMEM;
2866                 goto out_release_region;
2867         }
2868
2869         host->pci_dev = pdev;
2870
2871         host->semaph = 1;
2872         spin_lock_init(&host->semaph_lock);
2873         host->num_scbs = num_scb;
2874         host->scb = scb;
2875         host->next_pending = scb;
2876         host->next_avail = scb;
2877         for (i = 0, tmp = scb; i < num_scb; i++, tmp++) {
2878                 tmp->tagid = i;
2879                 if (i != 0)
2880                         prev->next = tmp;
2881                 prev = tmp;
2882         }
2883         prev->next = NULL;
2884         host->scb_end = tmp;
2885         host->first_avail = scb;
2886         host->last_avail = prev;
2887         spin_lock_init(&host->avail_lock);
2888
2889         initio_init(host, phys_to_virt(((u32)bios_seg << 4)));
2890
2891         host->jsstatus0 = 0;
2892
2893         shost->io_port = host->addr;
2894         shost->n_io_port = 0xff;
2895         shost->can_queue = num_scb;             /* 03/05/98                      */
2896         shost->unique_id = host->addr;
2897         shost->max_id = host->max_tar;
2898         shost->max_lun = 32;    /* 10/21/97                     */
2899         shost->irq = pdev->irq;
2900         shost->this_id = host->scsi_id; /* Assign HCS index           */
2901         shost->base = host->addr;
2902         shost->sg_tablesize = TOTAL_SG_ENTRY;
2903
2904         error = request_irq(pdev->irq, i91u_intr, IRQF_SHARED, "i91u", shost);
2905         if (error < 0) {
2906                 printk(KERN_WARNING "initio: Unable to request IRQ %d\n", pdev->irq);
2907                 goto out_free_scbs;
2908         }
2909
2910         pci_set_drvdata(pdev, shost);
2911
2912         error = scsi_add_host(shost, &pdev->dev);
2913         if (error)
2914                 goto out_free_irq;
2915         scsi_scan_host(shost);
2916         return 0;
2917 out_free_irq:
2918         free_irq(pdev->irq, shost);
2919 out_free_scbs:
2920         kfree(host->scb);
2921 out_release_region:
2922         release_region(host->addr, 256);
2923 out_host_put:
2924         scsi_host_put(shost);
2925 out_disable_device:
2926         pci_disable_device(pdev);
2927         return error;
2928 }
2929
2930 /**
2931  *      initio_remove_one       -       control shutdown
2932  *      @pdev:  PCI device being released
2933  *
2934  *      Release the resources assigned to this adapter after it has
2935  *      finished being used.
2936  */
2937
2938 static void initio_remove_one(struct pci_dev *pdev)
2939 {
2940         struct Scsi_Host *host = pci_get_drvdata(pdev);
2941         struct initio_host *s = (struct initio_host *)host->hostdata;
2942         scsi_remove_host(host);
2943         free_irq(pdev->irq, host);
2944         release_region(s->addr, 256);
2945         scsi_host_put(host);
2946         pci_disable_device(pdev);
2947 }
2948
2949 MODULE_LICENSE("GPL");
2950
2951 static struct pci_device_id initio_pci_tbl[] = {
2952         {PCI_VENDOR_ID_INIT, 0x9500, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2953         {PCI_VENDOR_ID_INIT, 0x9400, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2954         {PCI_VENDOR_ID_INIT, 0x9401, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2955         {PCI_VENDOR_ID_INIT, 0x0002, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2956         {PCI_VENDOR_ID_DOMEX, 0x0002, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2957         {0,}
2958 };
2959 MODULE_DEVICE_TABLE(pci, initio_pci_tbl);
2960
2961 static struct pci_driver initio_pci_driver = {
2962         .name           = "initio",
2963         .id_table       = initio_pci_tbl,
2964         .probe          = initio_probe_one,
2965         .remove         = initio_remove_one,
2966 };
2967 module_pci_driver(initio_pci_driver);
2968
2969 MODULE_DESCRIPTION("Initio INI-9X00U/UW SCSI device driver");
2970 MODULE_AUTHOR("Initio Corporation");
2971 MODULE_LICENSE("GPL");