linux/drivers/scsi/initio.c
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   1/**************************************************************************
   2 * Initio 9100 device driver for Linux.
   3 *
   4 * Copyright (c) 1994-1998 Initio Corporation
   5 * Copyright (c) 1998 Bas Vermeulen <bvermeul@blackstar.xs4all.nl>
   6 * Copyright (c) 2004 Christoph Hellwig <hch@lst.de>
   7 * Copyright (c) 2007 Red Hat
   8 *
   9 * This program is free software; you can redistribute it and/or modify
  10 * it under the terms of the GNU General Public License as published by
  11 * the Free Software Foundation; either version 2, or (at your option)
  12 * any later version.
  13 *
  14 * This program is distributed in the hope that it will be useful,
  15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 * GNU General Public License for more details.
  18 *
  19 * You should have received a copy of the GNU General Public License
  20 * along with this program; see the file COPYING.  If not, write to
  21 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  22 *
  23 *
  24 *************************************************************************
  25 *
  26 * DESCRIPTION:
  27 *
  28 * This is the Linux low-level SCSI driver for Initio INI-9X00U/UW SCSI host
  29 * adapters
  30 *
  31 * 08/06/97 hc  - v1.01h
  32 *              - Support inic-940 and inic-935
  33 * 09/26/97 hc  - v1.01i
  34 *              - Make correction from J.W. Schultz suggestion
  35 * 10/13/97 hc  - Support reset function
  36 * 10/21/97 hc  - v1.01j
  37 *              - Support 32 LUN (SCSI 3)
  38 * 01/14/98 hc  - v1.01k
  39 *              - Fix memory allocation problem
  40 * 03/04/98 hc  - v1.01l
  41 *              - Fix tape rewind which will hang the system problem
  42 *              - Set can_queue to initio_num_scb
  43 * 06/25/98 hc  - v1.01m
  44 *              - Get it work for kernel version >= 2.1.75
  45 *              - Dynamic assign SCSI bus reset holding time in initio_init()
  46 * 07/02/98 hc  - v1.01n
  47 *              - Support 0002134A
  48 * 08/07/98 hc  - v1.01o
  49 *              - Change the initio_abort_srb routine to use scsi_done. <01>
  50 * 09/07/98 hl  - v1.02
  51 *              - Change the INI9100U define and proc_dir_entry to
  52 *                reflect the newer Kernel 2.1.118, but the v1.o1o
  53 *                should work with Kernel 2.1.118.
  54 * 09/20/98 wh  - v1.02a
  55 *              - Support Abort command.
  56 *              - Handle reset routine.
  57 * 09/21/98 hl  - v1.03
  58 *              - remove comments.
  59 * 12/09/98 bv  - v1.03a
  60 *              - Removed unused code
  61 * 12/13/98 bv  - v1.03b
  62 *              - Remove cli() locking for kernels >= 2.1.95. This uses
  63 *                spinlocks to serialize access to the pSRB_head and
  64 *                pSRB_tail members of the HCS structure.
  65 * 09/01/99 bv  - v1.03d
  66 *              - Fixed a deadlock problem in SMP.
  67 * 21/01/99 bv  - v1.03e
  68 *              - Add support for the Domex 3192U PCI SCSI
  69 *                This is a slightly modified patch by
  70 *                Brian Macy <bmacy@sunshinecomputing.com>
  71 * 22/02/99 bv  - v1.03f
  72 *              - Didn't detect the INIC-950 in 2.0.x correctly.
  73 *                Now fixed.
  74 * 05/07/99 bv  - v1.03g
  75 *              - Changed the assumption that HZ = 100
  76 * 10/17/03 mc  - v1.04
  77 *              - added new DMA API support
  78 * 06/01/04 jmd - v1.04a
  79 *              - Re-add reset_bus support
  80 **************************************************************************/
  81
  82#include <linux/module.h>
  83#include <linux/errno.h>
  84#include <linux/delay.h>
  85#include <linux/pci.h>
  86#include <linux/init.h>
  87#include <linux/blkdev.h>
  88#include <linux/spinlock.h>
  89#include <linux/stat.h>
  90#include <linux/kernel.h>
  91#include <linux/proc_fs.h>
  92#include <linux/string.h>
  93#include <linux/interrupt.h>
  94#include <linux/ioport.h>
  95#include <linux/slab.h>
  96#include <linux/jiffies.h>
  97#include <linux/dma-mapping.h>
  98#include <asm/io.h>
  99
 100#include <scsi/scsi.h>
 101#include <scsi/scsi_cmnd.h>
 102#include <scsi/scsi_device.h>
 103#include <scsi/scsi_host.h>
 104#include <scsi/scsi_tcq.h>
 105
 106#include "initio.h"
 107
 108#define SENSE_SIZE              14
 109
 110#define i91u_MAXQUEUE           2
 111#define i91u_REVID "Initio INI-9X00U/UW SCSI device driver; Revision: 1.04a"
 112
 113#ifdef DEBUG_i91u
 114static unsigned int i91u_debug = DEBUG_DEFAULT;
 115#endif
 116
 117static int initio_tag_enable = 1;
 118
 119#ifdef DEBUG_i91u
 120static int setup_debug = 0;
 121#endif
 122
 123static void i91uSCBPost(u8 * pHcb, u8 * pScb);
 124
 125#define DEBUG_INTERRUPT 0
 126#define DEBUG_QUEUE     0
 127#define DEBUG_STATE     0
 128#define INT_DISC        0
 129
 130/*--- forward references ---*/
 131static struct scsi_ctrl_blk *initio_find_busy_scb(struct initio_host * host, u16 tarlun);
 132static struct scsi_ctrl_blk *initio_find_done_scb(struct initio_host * host);
 133
 134static int tulip_main(struct initio_host * host);
 135
 136static int initio_next_state(struct initio_host * host);
 137static int initio_state_1(struct initio_host * host);
 138static int initio_state_2(struct initio_host * host);
 139static int initio_state_3(struct initio_host * host);
 140static int initio_state_4(struct initio_host * host);
 141static int initio_state_5(struct initio_host * host);
 142static int initio_state_6(struct initio_host * host);
 143static int initio_state_7(struct initio_host * host);
 144static int initio_xfer_data_in(struct initio_host * host);
 145static int initio_xfer_data_out(struct initio_host * host);
 146static int initio_xpad_in(struct initio_host * host);
 147static int initio_xpad_out(struct initio_host * host);
 148static int initio_status_msg(struct initio_host * host);
 149
 150static int initio_msgin(struct initio_host * host);
 151static int initio_msgin_sync(struct initio_host * host);
 152static int initio_msgin_accept(struct initio_host * host);
 153static int initio_msgout_reject(struct initio_host * host);
 154static int initio_msgin_extend(struct initio_host * host);
 155
 156static int initio_msgout_ide(struct initio_host * host);
 157static int initio_msgout_abort_targ(struct initio_host * host);
 158static int initio_msgout_abort_tag(struct initio_host * host);
 159
 160static int initio_bus_device_reset(struct initio_host * host);
 161static void initio_select_atn(struct initio_host * host, struct scsi_ctrl_blk * scb);
 162static void initio_select_atn3(struct initio_host * host, struct scsi_ctrl_blk * scb);
 163static void initio_select_atn_stop(struct initio_host * host, struct scsi_ctrl_blk * scb);
 164static int int_initio_busfree(struct initio_host * host);
 165static int int_initio_scsi_rst(struct initio_host * host);
 166static int int_initio_bad_seq(struct initio_host * host);
 167static int int_initio_resel(struct initio_host * host);
 168static int initio_sync_done(struct initio_host * host);
 169static int wdtr_done(struct initio_host * host);
 170static int wait_tulip(struct initio_host * host);
 171static int initio_wait_done_disc(struct initio_host * host);
 172static int initio_wait_disc(struct initio_host * host);
 173static void tulip_scsi(struct initio_host * host);
 174static int initio_post_scsi_rst(struct initio_host * host);
 175
 176static void initio_se2_ew_en(unsigned long base);
 177static void initio_se2_ew_ds(unsigned long base);
 178static int initio_se2_rd_all(unsigned long base);
 179static void initio_se2_update_all(unsigned long base);  /* setup default pattern */
 180static void initio_read_eeprom(unsigned long base);
 181
 182/* ---- INTERNAL VARIABLES ---- */
 183
 184static NVRAM i91unvram;
 185static NVRAM *i91unvramp;
 186
 187static u8 i91udftNvRam[64] =
 188{
 189        /*----------- header -----------*/
 190        0x25, 0xc9,             /* Signature    */
 191        0x40,                   /* Size         */
 192        0x01,                   /* Revision     */
 193        /* -- Host Adapter Structure -- */
 194        0x95,                   /* ModelByte0   */
 195        0x00,                   /* ModelByte1   */
 196        0x00,                   /* ModelInfo    */
 197        0x01,                   /* NumOfCh      */
 198        NBC1_DEFAULT,           /* BIOSConfig1  */
 199        0,                      /* BIOSConfig2  */
 200        0,                      /* HAConfig1    */
 201        0,                      /* HAConfig2    */
 202        /* SCSI channel 0 and target Structure  */
 203        7,                      /* SCSIid       */
 204        NCC1_DEFAULT,           /* SCSIconfig1  */
 205        0,                      /* SCSIconfig2  */
 206        0x10,                   /* NumSCSItarget */
 207
 208        NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
 209        NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
 210        NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
 211        NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
 212
 213        /* SCSI channel 1 and target Structure  */
 214        7,                      /* SCSIid       */
 215        NCC1_DEFAULT,           /* SCSIconfig1  */
 216        0,                      /* SCSIconfig2  */
 217        0x10,                   /* NumSCSItarget */
 218
 219        NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
 220        NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
 221        NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
 222        NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
 223        0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
 224        0, 0};                  /*      - CheckSum -            */
 225
 226
 227static u8 initio_rate_tbl[8] =  /* fast 20      */
 228{
 229                                /* nanosecond divide by 4 */
 230        12,                     /* 50ns,  20M   */
 231        18,                     /* 75ns,  13.3M */
 232        25,                     /* 100ns, 10M   */
 233        31,                     /* 125ns, 8M    */
 234        37,                     /* 150ns, 6.6M  */
 235        43,                     /* 175ns, 5.7M  */
 236        50,                     /* 200ns, 5M    */
 237        62                      /* 250ns, 4M    */
 238};
 239
 240static void initio_do_pause(unsigned amount)
 241{
 242        /* Pause for amount jiffies */
 243        unsigned long the_time = jiffies + amount;
 244
 245        while (time_before_eq(jiffies, the_time))
 246                cpu_relax();
 247}
 248
 249/*-- forward reference --*/
 250
 251/******************************************************************
 252 Input: instruction for  Serial E2PROM
 253
 254 EX: se2_rd(0 call se2_instr() to send address and read command
 255
 256         StartBit  OP_Code   Address                Data
 257         --------- --------  ------------------     -------
 258         1         1 , 0     A5,A4,A3,A2,A1,A0      D15-D0
 259
 260                 +-----------------------------------------------------
 261                 |
 262 CS -----+
 263                        +--+  +--+  +--+  +--+  +--+
 264                        ^  |  ^  |  ^  |  ^  |  ^  |
 265                        |  |  |  |  |  |  |  |  |  |
 266 CLK -------+  +--+  +--+  +--+  +--+  +--
 267 (leading edge trigger)
 268
 269                 +--1-----1--+
 270                 | SB    OP  |  OP    A5    A4
 271 DI  ----+           +--0------------------
 272 (address and cmd sent to nvram)
 273
 274         -------------------------------------------+
 275                                                                                                |
 276 DO                                             +---
 277 (data sent from nvram)
 278
 279
 280******************************************************************/
 281
 282/**
 283 *      initio_se2_instr        -       bitbang an instruction
 284 *      @base: Base of InitIO controller
 285 *      @instr: Instruction for serial E2PROM
 286 *
 287 *      Bitbang an instruction out to the serial E2Prom
 288 */
 289
 290static void initio_se2_instr(unsigned long base, u8 instr)
 291{
 292        int i;
 293        u8 b;
 294
 295        outb(SE2CS | SE2DO, base + TUL_NVRAM);          /* cs+start bit */
 296        udelay(30);
 297        outb(SE2CS | SE2CLK | SE2DO, base + TUL_NVRAM); /* +CLK */
 298        udelay(30);
 299
 300        for (i = 0; i < 8; i++) {
 301                if (instr & 0x80)
 302                        b = SE2CS | SE2DO;              /* -CLK+dataBit */
 303                else
 304                        b = SE2CS;                      /* -CLK */
 305                outb(b, base + TUL_NVRAM);
 306                udelay(30);
 307                outb(b | SE2CLK, base + TUL_NVRAM);     /* +CLK */
 308                udelay(30);
 309                instr <<= 1;
 310        }
 311        outb(SE2CS, base + TUL_NVRAM);                  /* -CLK */
 312        udelay(30);
 313}
 314
 315
 316/**
 317 *      initio_se2_ew_en        -       Enable erase/write
 318 *      @base: Base address of InitIO controller
 319 *
 320 *      Enable erase/write state of serial EEPROM
 321 */
 322void initio_se2_ew_en(unsigned long base)
 323{
 324        initio_se2_instr(base, 0x30);   /* EWEN */
 325        outb(0, base + TUL_NVRAM);      /* -CS  */
 326        udelay(30);
 327}
 328
 329
 330/**
 331 *      initio_se2_ew_ds        -       Disable erase/write
 332 *      @base: Base address of InitIO controller
 333 *
 334 *      Disable erase/write state of serial EEPROM
 335 */
 336void initio_se2_ew_ds(unsigned long base)
 337{
 338        initio_se2_instr(base, 0);      /* EWDS */
 339        outb(0, base + TUL_NVRAM);      /* -CS  */
 340        udelay(30);
 341}
 342
 343
 344/**
 345 *      initio_se2_rd           -       read E2PROM word
 346 *      @base: Base of InitIO controller
 347 *      @addr: Address of word in E2PROM
 348 *
 349 *      Read a word from the NV E2PROM device
 350 */
 351static u16 initio_se2_rd(unsigned long base, u8 addr)
 352{
 353        u8 instr, rb;
 354        u16 val = 0;
 355        int i;
 356
 357        instr = (u8) (addr | 0x80);
 358        initio_se2_instr(base, instr);  /* READ INSTR */
 359
 360        for (i = 15; i >= 0; i--) {
 361                outb(SE2CS | SE2CLK, base + TUL_NVRAM); /* +CLK */
 362                udelay(30);
 363                outb(SE2CS, base + TUL_NVRAM);          /* -CLK */
 364
 365                /* sample data after the following edge of clock  */
 366                rb = inb(base + TUL_NVRAM);
 367                rb &= SE2DI;
 368                val += (rb << i);
 369                udelay(30);     /* 6/20/95 */
 370        }
 371
 372        outb(0, base + TUL_NVRAM);              /* no chip select */
 373        udelay(30);
 374        return val;
 375}
 376
 377/**
 378 *      initio_se2_wr           -       read E2PROM word
 379 *      @base: Base of InitIO controller
 380 *      @addr: Address of word in E2PROM
 381 *      @val: Value to write
 382 *
 383 *      Write a word to the NV E2PROM device. Used when recovering from
 384 *      a problem with the NV.
 385 */
 386static void initio_se2_wr(unsigned long base, u8 addr, u16 val)
 387{
 388        u8 rb;
 389        u8 instr;
 390        int i;
 391
 392        instr = (u8) (addr | 0x40);
 393        initio_se2_instr(base, instr);  /* WRITE INSTR */
 394        for (i = 15; i >= 0; i--) {
 395                if (val & 0x8000)
 396                        outb(SE2CS | SE2DO, base + TUL_NVRAM);  /* -CLK+dataBit 1 */
 397                else
 398                        outb(SE2CS, base + TUL_NVRAM);          /* -CLK+dataBit 0 */
 399                udelay(30);
 400                outb(SE2CS | SE2CLK, base + TUL_NVRAM);         /* +CLK */
 401                udelay(30);
 402                val <<= 1;
 403        }
 404        outb(SE2CS, base + TUL_NVRAM);                          /* -CLK */
 405        udelay(30);
 406        outb(0, base + TUL_NVRAM);                              /* -CS  */
 407        udelay(30);
 408
 409        outb(SE2CS, base + TUL_NVRAM);                          /* +CS  */
 410        udelay(30);
 411
 412        for (;;) {
 413                outb(SE2CS | SE2CLK, base + TUL_NVRAM);         /* +CLK */
 414                udelay(30);
 415                outb(SE2CS, base + TUL_NVRAM);                  /* -CLK */
 416                udelay(30);
 417                if ((rb = inb(base + TUL_NVRAM)) & SE2DI)
 418                        break;  /* write complete */
 419        }
 420        outb(0, base + TUL_NVRAM);                              /* -CS */
 421}
 422
 423/**
 424 *      initio_se2_rd_all       -       read hostadapter NV configuration
 425 *      @base: Base address of InitIO controller
 426 *
 427 *      Reads the E2PROM data into main memory. Ensures that the checksum
 428 *      and header marker are valid. Returns 1 on success -1 on error.
 429 */
 430
 431static int initio_se2_rd_all(unsigned long base)
 432{
 433        int i;
 434        u16 chksum = 0;
 435        u16 *np;
 436
 437        i91unvramp = &i91unvram;
 438        np = (u16 *) i91unvramp;
 439        for (i = 0; i < 32; i++)
 440                *np++ = initio_se2_rd(base, i);
 441
 442        /* Is signature "ini" ok ? */
 443        if (i91unvramp->NVM_Signature != INI_SIGNATURE)
 444                return -1;
 445        /* Is ckecksum ok ? */
 446        np = (u16 *) i91unvramp;
 447        for (i = 0; i < 31; i++)
 448                chksum += *np++;
 449        if (i91unvramp->NVM_CheckSum != chksum)
 450                return -1;
 451        return 1;
 452}
 453
 454/**
 455 *      initio_se2_update_all           -       Update E2PROM
 456 *      @base: Base of InitIO controller
 457 *
 458 *      Update the E2PROM by wrting any changes into the E2PROM
 459 *      chip, rewriting the checksum.
 460 */
 461static void initio_se2_update_all(unsigned long base)
 462{                               /* setup default pattern */
 463        int i;
 464        u16 chksum = 0;
 465        u16 *np, *np1;
 466
 467        i91unvramp = &i91unvram;
 468        /* Calculate checksum first */
 469        np = (u16 *) i91udftNvRam;
 470        for (i = 0; i < 31; i++)
 471                chksum += *np++;
 472        *np = chksum;
 473        initio_se2_ew_en(base); /* Enable write  */
 474
 475        np = (u16 *) i91udftNvRam;
 476        np1 = (u16 *) i91unvramp;
 477        for (i = 0; i < 32; i++, np++, np1++) {
 478                if (*np != *np1)
 479                        initio_se2_wr(base, i, *np);
 480        }
 481        initio_se2_ew_ds(base); /* Disable write   */
 482}
 483
 484/**
 485 *      initio_read_eeprom              -       Retrieve configuration
 486 *      @base: Base of InitIO Host Adapter
 487 *
 488 *      Retrieve the host adapter configuration data from E2Prom. If the
 489 *      data is invalid then the defaults are used and are also restored
 490 *      into the E2PROM. This forms the access point for the SCSI driver
 491 *      into the E2PROM layer, the other functions for the E2PROM are all
 492 *      internal use.
 493 *
 494 *      Must be called single threaded, uses a shared global area.
 495 */
 496
 497static void initio_read_eeprom(unsigned long base)
 498{
 499        u8 gctrl;
 500
 501        i91unvramp = &i91unvram;
 502        /* Enable EEProm programming */
 503        gctrl = inb(base + TUL_GCTRL);
 504        outb(gctrl | TUL_GCTRL_EEPROM_BIT, base + TUL_GCTRL);
 505        if (initio_se2_rd_all(base) != 1) {
 506                initio_se2_update_all(base);    /* setup default pattern */
 507                initio_se2_rd_all(base);        /* load again  */
 508        }
 509        /* Disable EEProm programming */
 510        gctrl = inb(base + TUL_GCTRL);
 511        outb(gctrl & ~TUL_GCTRL_EEPROM_BIT, base + TUL_GCTRL);
 512}
 513
 514/**
 515 *      initio_stop_bm          -       stop bus master
 516 *      @host: InitIO we are stopping
 517 *
 518 *      Stop any pending DMA operation, aborting the DMA if necessary
 519 */
 520
 521static void initio_stop_bm(struct initio_host * host)
 522{
 523
 524        if (inb(host->addr + TUL_XStatus) & XPEND) {    /* if DMA xfer is pending, abort DMA xfer */
 525                outb(TAX_X_ABT | TAX_X_CLR_FIFO, host->addr + TUL_XCmd);
 526                /* wait Abort DMA xfer done */
 527                while ((inb(host->addr + TUL_Int) & XABT) == 0)
 528                        cpu_relax();
 529        }
 530        outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
 531}
 532
 533/**
 534 *      initio_reset_scsi               -       Reset SCSI host controller
 535 *      @host: InitIO host to reset
 536 *      @seconds: Recovery time
 537 *
 538 *      Perform a full reset of the SCSI subsystem.
 539 */
 540
 541static int initio_reset_scsi(struct initio_host * host, int seconds)
 542{
 543        outb(TSC_RST_BUS, host->addr + TUL_SCtrl0);
 544
 545        while (!((host->jsint = inb(host->addr + TUL_SInt)) & TSS_SCSIRST_INT))
 546                cpu_relax();
 547
 548        /* reset tulip chip */
 549        outb(0, host->addr + TUL_SSignal);
 550
 551        /* Stall for a while, wait for target's firmware ready,make it 2 sec ! */
 552        /* SONY 5200 tape drive won't work if only stall for 1 sec */
 553        /* FIXME: this is a very long busy wait right now */
 554        initio_do_pause(seconds * HZ);
 555
 556        inb(host->addr + TUL_SInt);
 557        return SCSI_RESET_SUCCESS;
 558}
 559
 560/**
 561 *      initio_init             -       set up an InitIO host adapter
 562 *      @host: InitIO host adapter
 563 *      @num_scbs: Number of SCBS
 564 *      @bios_addr: BIOS address
 565 *
 566 *      Set up the host adapter and devices according to the configuration
 567 *      retrieved from the E2PROM.
 568 *
 569 *      Locking: Calls E2PROM layer code which is not re-enterable so must
 570 *      run single threaded for now.
 571 */
 572
 573static void initio_init(struct initio_host * host, u8 *bios_addr)
 574{
 575        int i;
 576        u8 *flags;
 577        u8 *heads;
 578
 579        /* Get E2Prom configuration */
 580        initio_read_eeprom(host->addr);
 581        if (i91unvramp->NVM_SCSIInfo[0].NVM_NumOfTarg == 8)
 582                host->max_tar = 8;
 583        else
 584                host->max_tar = 16;
 585
 586        host->config = i91unvramp->NVM_SCSIInfo[0].NVM_ChConfig1;
 587
 588        host->scsi_id = i91unvramp->NVM_SCSIInfo[0].NVM_ChSCSIID;
 589        host->idmask = ~(1 << host->scsi_id);
 590
 591#ifdef CHK_PARITY
 592        /* Enable parity error response */
 593        outb(inb(host->addr + TUL_PCMD) | 0x40, host->addr + TUL_PCMD);
 594#endif
 595
 596        /* Mask all the interrupt       */
 597        outb(0x1F, host->addr + TUL_Mask);
 598
 599        initio_stop_bm(host);
 600        /* --- Initialize the tulip --- */
 601        outb(TSC_RST_CHIP, host->addr + TUL_SCtrl0);
 602
 603        /* program HBA's SCSI ID        */
 604        outb(host->scsi_id << 4, host->addr + TUL_SScsiId);
 605
 606        /* Enable Initiator Mode ,phase latch,alternate sync period mode,
 607           disable SCSI reset */
 608        if (host->config & HCC_EN_PAR)
 609                host->sconf1 = (TSC_INITDEFAULT | TSC_EN_SCSI_PAR);
 610        else
 611                host->sconf1 = (TSC_INITDEFAULT);
 612        outb(host->sconf1, host->addr + TUL_SConfig);
 613
 614        /* Enable HW reselect */
 615        outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1);
 616
 617        outb(0, host->addr + TUL_SPeriod);
 618
 619        /* selection time out = 250 ms */
 620        outb(153, host->addr + TUL_STimeOut);
 621
 622        /* Enable SCSI terminator */
 623        outb((host->config & (HCC_ACT_TERM1 | HCC_ACT_TERM2)),
 624                host->addr + TUL_XCtrl);
 625        outb(((host->config & HCC_AUTO_TERM) >> 4) |
 626                (inb(host->addr + TUL_GCTRL1) & 0xFE),
 627                host->addr + TUL_GCTRL1);
 628
 629        for (i = 0,
 630             flags = & (i91unvramp->NVM_SCSIInfo[0].NVM_Targ0Config),
 631             heads = bios_addr + 0x180;
 632             i < host->max_tar;
 633             i++, flags++) {
 634                host->targets[i].flags = *flags & ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
 635                if (host->targets[i].flags & TCF_EN_255)
 636                        host->targets[i].drv_flags = TCF_DRV_255_63;
 637                else
 638                        host->targets[i].drv_flags = 0;
 639                host->targets[i].js_period = 0;
 640                host->targets[i].sconfig0 = host->sconf1;
 641                host->targets[i].heads = *heads++;
 642                if (host->targets[i].heads == 255)
 643                        host->targets[i].drv_flags = TCF_DRV_255_63;
 644                else
 645                        host->targets[i].drv_flags = 0;
 646                host->targets[i].sectors = *heads++;
 647                host->targets[i].flags &= ~TCF_BUSY;
 648                host->act_tags[i] = 0;
 649                host->max_tags[i] = 0xFF;
 650        }                       /* for                          */
 651        printk("i91u: PCI Base=0x%04X, IRQ=%d, BIOS=0x%04X0, SCSI ID=%d\n",
 652               host->addr, host->pci_dev->irq,
 653               host->bios_addr, host->scsi_id);
 654        /* Reset SCSI Bus */
 655        if (host->config & HCC_SCSI_RESET) {
 656                printk(KERN_INFO "i91u: Reset SCSI Bus ... \n");
 657                initio_reset_scsi(host, 10);
 658        }
 659        outb(0x17, host->addr + TUL_SCFG1);
 660        outb(0xE9, host->addr + TUL_SIntEnable);
 661}
 662
 663/**
 664 *      initio_alloc_scb                -       Allocate an SCB
 665 *      @host: InitIO host we are allocating for
 666 *
 667 *      Walk the SCB list for the controller and allocate a free SCB if
 668 *      one exists.
 669 */
 670static struct scsi_ctrl_blk *initio_alloc_scb(struct initio_host *host)
 671{
 672        struct scsi_ctrl_blk *scb;
 673        unsigned long flags;
 674
 675        spin_lock_irqsave(&host->avail_lock, flags);
 676        if ((scb = host->first_avail) != NULL) {
 677#if DEBUG_QUEUE
 678                printk("find scb at %p\n", scb);
 679#endif
 680                if ((host->first_avail = scb->next) == NULL)
 681                        host->last_avail = NULL;
 682                scb->next = NULL;
 683                scb->status = SCB_RENT;
 684        }
 685        spin_unlock_irqrestore(&host->avail_lock, flags);
 686        return scb;
 687}
 688
 689/**
 690 *      initio_release_scb              -       Release an SCB
 691 *      @host: InitIO host that owns the SCB
 692 *      @cmnd: SCB command block being returned
 693 *
 694 *      Return an allocated SCB to the host free list
 695 */
 696
 697static void initio_release_scb(struct initio_host * host, struct scsi_ctrl_blk * cmnd)
 698{
 699        unsigned long flags;
 700
 701#if DEBUG_QUEUE
 702        printk("Release SCB %p; ", cmnd);
 703#endif
 704        spin_lock_irqsave(&(host->avail_lock), flags);
 705        cmnd->srb = NULL;
 706        cmnd->status = 0;
 707        cmnd->next = NULL;
 708        if (host->last_avail != NULL) {
 709                host->last_avail->next = cmnd;
 710                host->last_avail = cmnd;
 711        } else {
 712                host->first_avail = cmnd;
 713                host->last_avail = cmnd;
 714        }
 715        spin_unlock_irqrestore(&(host->avail_lock), flags);
 716}
 717
 718/***************************************************************************/
 719static void initio_append_pend_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
 720{
 721
 722#if DEBUG_QUEUE
 723        printk("Append pend SCB %p; ", scbp);
 724#endif
 725        scbp->status = SCB_PEND;
 726        scbp->next = NULL;
 727        if (host->last_pending != NULL) {
 728                host->last_pending->next = scbp;
 729                host->last_pending = scbp;
 730        } else {
 731                host->first_pending = scbp;
 732                host->last_pending = scbp;
 733        }
 734}
 735
 736/***************************************************************************/
 737static void initio_push_pend_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
 738{
 739
 740#if DEBUG_QUEUE
 741        printk("Push pend SCB %p; ", scbp);
 742#endif
 743        scbp->status = SCB_PEND;
 744        if ((scbp->next = host->first_pending) != NULL) {
 745                host->first_pending = scbp;
 746        } else {
 747                host->first_pending = scbp;
 748                host->last_pending = scbp;
 749        }
 750}
 751
 752static struct scsi_ctrl_blk *initio_find_first_pend_scb(struct initio_host * host)
 753{
 754        struct scsi_ctrl_blk *first;
 755
 756
 757        first = host->first_pending;
 758        while (first != NULL) {
 759                if (first->opcode != ExecSCSI)
 760                        return first;
 761                if (first->tagmsg == 0) {
 762                        if ((host->act_tags[first->target] == 0) &&
 763                            !(host->targets[first->target].flags & TCF_BUSY))
 764                                return first;
 765                } else {
 766                        if ((host->act_tags[first->target] >=
 767                          host->max_tags[first->target]) |
 768                            (host->targets[first->target].flags & TCF_BUSY)) {
 769                                first = first->next;
 770                                continue;
 771                        }
 772                        return first;
 773                }
 774                first = first->next;
 775        }
 776        return first;
 777}
 778
 779static void initio_unlink_pend_scb(struct initio_host * host, struct scsi_ctrl_blk * scb)
 780{
 781        struct scsi_ctrl_blk *tmp, *prev;
 782
 783#if DEBUG_QUEUE
 784        printk("unlink pend SCB %p; ", scb);
 785#endif
 786
 787        prev = tmp = host->first_pending;
 788        while (tmp != NULL) {
 789                if (scb == tmp) {       /* Unlink this SCB              */
 790                        if (tmp == host->first_pending) {
 791                                if ((host->first_pending = tmp->next) == NULL)
 792                                        host->last_pending = NULL;
 793                        } else {
 794                                prev->next = tmp->next;
 795                                if (tmp == host->last_pending)
 796                                        host->last_pending = prev;
 797                        }
 798                        tmp->next = NULL;
 799                        break;
 800                }
 801                prev = tmp;
 802                tmp = tmp->next;
 803        }
 804}
 805
 806static void initio_append_busy_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
 807{
 808
 809#if DEBUG_QUEUE
 810        printk("append busy SCB %p; ", scbp);
 811#endif
 812        if (scbp->tagmsg)
 813                host->act_tags[scbp->target]++;
 814        else
 815                host->targets[scbp->target].flags |= TCF_BUSY;
 816        scbp->status = SCB_BUSY;
 817        scbp->next = NULL;
 818        if (host->last_busy != NULL) {
 819                host->last_busy->next = scbp;
 820                host->last_busy = scbp;
 821        } else {
 822                host->first_busy = scbp;
 823                host->last_busy = scbp;
 824        }
 825}
 826
 827/***************************************************************************/
 828static struct scsi_ctrl_blk *initio_pop_busy_scb(struct initio_host * host)
 829{
 830        struct scsi_ctrl_blk *tmp;
 831
 832
 833        if ((tmp = host->first_busy) != NULL) {
 834                if ((host->first_busy = tmp->next) == NULL)
 835                        host->last_busy = NULL;
 836                tmp->next = NULL;
 837                if (tmp->tagmsg)
 838                        host->act_tags[tmp->target]--;
 839                else
 840                        host->targets[tmp->target].flags &= ~TCF_BUSY;
 841        }
 842#if DEBUG_QUEUE
 843        printk("Pop busy SCB %p; ", tmp);
 844#endif
 845        return tmp;
 846}
 847
 848/***************************************************************************/
 849static void initio_unlink_busy_scb(struct initio_host * host, struct scsi_ctrl_blk * scb)
 850{
 851        struct scsi_ctrl_blk *tmp, *prev;
 852
 853#if DEBUG_QUEUE
 854        printk("unlink busy SCB %p; ", scb);
 855#endif
 856
 857        prev = tmp = host->first_busy;
 858        while (tmp != NULL) {
 859                if (scb == tmp) {       /* Unlink this SCB              */
 860                        if (tmp == host->first_busy) {
 861                                if ((host->first_busy = tmp->next) == NULL)
 862                                        host->last_busy = NULL;
 863                        } else {
 864                                prev->next = tmp->next;
 865                                if (tmp == host->last_busy)
 866                                        host->last_busy = prev;
 867                        }
 868                        tmp->next = NULL;
 869                        if (tmp->tagmsg)
 870                                host->act_tags[tmp->target]--;
 871                        else
 872                                host->targets[tmp->target].flags &= ~TCF_BUSY;
 873                        break;
 874                }
 875                prev = tmp;
 876                tmp = tmp->next;
 877        }
 878        return;
 879}
 880
 881struct scsi_ctrl_blk *initio_find_busy_scb(struct initio_host * host, u16 tarlun)
 882{
 883        struct scsi_ctrl_blk *tmp, *prev;
 884        u16 scbp_tarlun;
 885
 886
 887        prev = tmp = host->first_busy;
 888        while (tmp != NULL) {
 889                scbp_tarlun = (tmp->lun << 8) | (tmp->target);
 890                if (scbp_tarlun == tarlun) {    /* Unlink this SCB              */
 891                        break;
 892                }
 893                prev = tmp;
 894                tmp = tmp->next;
 895        }
 896#if DEBUG_QUEUE
 897        printk("find busy SCB %p; ", tmp);
 898#endif
 899        return tmp;
 900}
 901
 902static void initio_append_done_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
 903{
 904#if DEBUG_QUEUE
 905        printk("append done SCB %p; ", scbp);
 906#endif
 907
 908        scbp->status = SCB_DONE;
 909        scbp->next = NULL;
 910        if (host->last_done != NULL) {
 911                host->last_done->next = scbp;
 912                host->last_done = scbp;
 913        } else {
 914                host->first_done = scbp;
 915                host->last_done = scbp;
 916        }
 917}
 918
 919struct scsi_ctrl_blk *initio_find_done_scb(struct initio_host * host)
 920{
 921        struct scsi_ctrl_blk *tmp;
 922
 923        if ((tmp = host->first_done) != NULL) {
 924                if ((host->first_done = tmp->next) == NULL)
 925                        host->last_done = NULL;
 926                tmp->next = NULL;
 927        }
 928#if DEBUG_QUEUE
 929        printk("find done SCB %p; ",tmp);
 930#endif
 931        return tmp;
 932}
 933
 934static int initio_abort_srb(struct initio_host * host, struct scsi_cmnd *srbp)
 935{
 936        unsigned long flags;
 937        struct scsi_ctrl_blk *tmp, *prev;
 938
 939        spin_lock_irqsave(&host->semaph_lock, flags);
 940
 941        if ((host->semaph == 0) && (host->active == NULL)) {
 942                /* disable Jasmin SCSI Int        */
 943                outb(0x1F, host->addr + TUL_Mask);
 944                spin_unlock_irqrestore(&host->semaph_lock, flags);
 945                /* FIXME: synchronize_irq needed ? */
 946                tulip_main(host);
 947                spin_lock_irqsave(&host->semaph_lock, flags);
 948                host->semaph = 1;
 949                outb(0x0F, host->addr + TUL_Mask);
 950                spin_unlock_irqrestore(&host->semaph_lock, flags);
 951                return SCSI_ABORT_SNOOZE;
 952        }
 953        prev = tmp = host->first_pending;       /* Check Pend queue */
 954        while (tmp != NULL) {
 955                /* 07/27/98 */
 956                if (tmp->srb == srbp) {
 957                        if (tmp == host->active) {
 958                                spin_unlock_irqrestore(&host->semaph_lock, flags);
 959                                return SCSI_ABORT_BUSY;
 960                        } else if (tmp == host->first_pending) {
 961                                if ((host->first_pending = tmp->next) == NULL)
 962                                        host->last_pending = NULL;
 963                        } else {
 964                                prev->next = tmp->next;
 965                                if (tmp == host->last_pending)
 966                                        host->last_pending = prev;
 967                        }
 968                        tmp->hastat = HOST_ABORTED;
 969                        tmp->flags |= SCF_DONE;
 970                        if (tmp->flags & SCF_POST)
 971                                (*tmp->post) ((u8 *) host, (u8 *) tmp);
 972                        spin_unlock_irqrestore(&host->semaph_lock, flags);
 973                        return SCSI_ABORT_SUCCESS;
 974                }
 975                prev = tmp;
 976                tmp = tmp->next;
 977        }
 978
 979        prev = tmp = host->first_busy;  /* Check Busy queue */
 980        while (tmp != NULL) {
 981                if (tmp->srb == srbp) {
 982                        if (tmp == host->active) {
 983                                spin_unlock_irqrestore(&host->semaph_lock, flags);
 984                                return SCSI_ABORT_BUSY;
 985                        } else if (tmp->tagmsg == 0) {
 986                                spin_unlock_irqrestore(&host->semaph_lock, flags);
 987                                return SCSI_ABORT_BUSY;
 988                        } else {
 989                                host->act_tags[tmp->target]--;
 990                                if (tmp == host->first_busy) {
 991                                        if ((host->first_busy = tmp->next) == NULL)
 992                                                host->last_busy = NULL;
 993                                } else {
 994                                        prev->next = tmp->next;
 995                                        if (tmp == host->last_busy)
 996                                                host->last_busy = prev;
 997                                }
 998                                tmp->next = NULL;
 999
1000
1001                                tmp->hastat = HOST_ABORTED;
1002                                tmp->flags |= SCF_DONE;
1003                                if (tmp->flags & SCF_POST)
1004                                        (*tmp->post) ((u8 *) host, (u8 *) tmp);
1005                                spin_unlock_irqrestore(&host->semaph_lock, flags);
1006                                return SCSI_ABORT_SUCCESS;
1007                        }
1008                }
1009                prev = tmp;
1010                tmp = tmp->next;
1011        }
1012        spin_unlock_irqrestore(&host->semaph_lock, flags);
1013        return SCSI_ABORT_NOT_RUNNING;
1014}
1015
1016/***************************************************************************/
1017static int initio_bad_seq(struct initio_host * host)
1018{
1019        struct scsi_ctrl_blk *scb;
1020
1021        printk("initio_bad_seg c=%d\n", host->index);
1022
1023        if ((scb = host->active) != NULL) {
1024                initio_unlink_busy_scb(host, scb);
1025                scb->hastat = HOST_BAD_PHAS;
1026                scb->tastat = 0;
1027                initio_append_done_scb(host, scb);
1028        }
1029        initio_stop_bm(host);
1030        initio_reset_scsi(host, 8);     /* 7/29/98 */
1031        return initio_post_scsi_rst(host);
1032}
1033
1034
1035/************************************************************************/
1036static void initio_exec_scb(struct initio_host * host, struct scsi_ctrl_blk * scb)
1037{
1038        unsigned long flags;
1039
1040        scb->mode = 0;
1041
1042        scb->sgidx = 0;
1043        scb->sgmax = scb->sglen;
1044
1045        spin_lock_irqsave(&host->semaph_lock, flags);
1046
1047        initio_append_pend_scb(host, scb);      /* Append this SCB to Pending queue */
1048
1049/* VVVVV 07/21/98 */
1050        if (host->semaph == 1) {
1051                /* Disable Jasmin SCSI Int */
1052                outb(0x1F, host->addr + TUL_Mask);
1053                host->semaph = 0;
1054                spin_unlock_irqrestore(&host->semaph_lock, flags);
1055
1056                tulip_main(host);
1057
1058                spin_lock_irqsave(&host->semaph_lock, flags);
1059                host->semaph = 1;
1060                outb(0x0F, host->addr + TUL_Mask);
1061        }
1062        spin_unlock_irqrestore(&host->semaph_lock, flags);
1063        return;
1064}
1065
1066/***************************************************************************/
1067static int initio_isr(struct initio_host * host)
1068{
1069        if (inb(host->addr + TUL_Int) & TSS_INT_PENDING) {
1070                if (host->semaph == 1) {
1071                        outb(0x1F, host->addr + TUL_Mask);
1072                        /* Disable Tulip SCSI Int */
1073                        host->semaph = 0;
1074
1075                        tulip_main(host);
1076
1077                        host->semaph = 1;
1078                        outb(0x0F, host->addr + TUL_Mask);
1079                        return 1;
1080                }
1081        }
1082        return 0;
1083}
1084
1085static int tulip_main(struct initio_host * host)
1086{
1087        struct scsi_ctrl_blk *scb;
1088
1089        for (;;) {
1090                tulip_scsi(host);       /* Call tulip_scsi              */
1091
1092                /* Walk the list of completed SCBs */
1093                while ((scb = initio_find_done_scb(host)) != NULL) {    /* find done entry */
1094                        if (scb->tastat == INI_QUEUE_FULL) {
1095                                host->max_tags[scb->target] =
1096                                    host->act_tags[scb->target] - 1;
1097                                scb->tastat = 0;
1098                                initio_append_pend_scb(host, scb);
1099                                continue;
1100                        }
1101                        if (!(scb->mode & SCM_RSENS)) {         /* not in auto req. sense mode */
1102                                if (scb->tastat == 2) {
1103
1104                                        /* clr sync. nego flag */
1105
1106                                        if (scb->flags & SCF_SENSE) {
1107                                                u8 len;
1108                                                len = scb->senselen;
1109                                                if (len == 0)
1110                                                        len = 1;
1111                                                scb->buflen = scb->senselen;
1112                                                scb->bufptr = scb->senseptr;
1113                                                scb->flags &= ~(SCF_SG | SCF_DIR);      /* for xfer_data_in */
1114                                                /* so, we won't report wrong direction in xfer_data_in,
1115                                                   and won't report HOST_DO_DU in state_6 */
1116                                                scb->mode = SCM_RSENS;
1117                                                scb->ident &= 0xBF;     /* Disable Disconnect */
1118                                                scb->tagmsg = 0;
1119                                                scb->tastat = 0;
1120                                                scb->cdblen = 6;
1121                                                scb->cdb[0] = SCSICMD_RequestSense;
1122                                                scb->cdb[1] = 0;
1123                                                scb->cdb[2] = 0;
1124                                                scb->cdb[3] = 0;
1125                                                scb->cdb[4] = len;
1126                                                scb->cdb[5] = 0;
1127                                                initio_push_pend_scb(host, scb);
1128                                                break;
1129                                        }
1130                                }
1131                        } else {        /* in request sense mode */
1132
1133                                if (scb->tastat == 2) {         /* check contition status again after sending
1134                                                                           requset sense cmd 0x3 */
1135                                        scb->hastat = HOST_BAD_PHAS;
1136                                }
1137                                scb->tastat = 2;
1138                        }
1139                        scb->flags |= SCF_DONE;
1140                        if (scb->flags & SCF_POST) {
1141                                /* FIXME: only one post method and lose casts */
1142                                (*scb->post) ((u8 *) host, (u8 *) scb);
1143                        }
1144                }               /* while */
1145                /* find_active: */
1146                if (inb(host->addr + TUL_SStatus0) & TSS_INT_PENDING)
1147                        continue;
1148                if (host->active)       /* return to OS and wait for xfer_done_ISR/Selected_ISR */
1149                        return 1;       /* return to OS, enable interrupt */
1150                /* Check pending SCB            */
1151                if (initio_find_first_pend_scb(host) == NULL)
1152                        return 1;       /* return to OS, enable interrupt */
1153        }                       /* End of for loop */
1154        /* statement won't reach here */
1155}
1156
1157static void tulip_scsi(struct initio_host * host)
1158{
1159        struct scsi_ctrl_blk *scb;
1160        struct target_control *active_tc;
1161
1162        /* make sure to service interrupt asap */
1163        if ((host->jsstatus0 = inb(host->addr + TUL_SStatus0)) & TSS_INT_PENDING) {
1164                host->phase = host->jsstatus0 & TSS_PH_MASK;
1165                host->jsstatus1 = inb(host->addr + TUL_SStatus1);
1166                host->jsint = inb(host->addr + TUL_SInt);
1167                if (host->jsint & TSS_SCSIRST_INT) {    /* SCSI bus reset detected      */
1168                        int_initio_scsi_rst(host);
1169                        return;
1170                }
1171                if (host->jsint & TSS_RESEL_INT) {      /* if selected/reselected interrupt */
1172                        if (int_initio_resel(host) == 0)
1173                                initio_next_state(host);
1174                        return;
1175                }
1176                if (host->jsint & TSS_SEL_TIMEOUT) {
1177                        int_initio_busfree(host);
1178                        return;
1179                }
1180                if (host->jsint & TSS_DISC_INT) {       /* BUS disconnection            */
1181                        int_initio_busfree(host);       /* unexpected bus free or sel timeout */
1182                        return;
1183                }
1184                if (host->jsint & (TSS_FUNC_COMP | TSS_BUS_SERV)) {     /* func complete or Bus service */
1185                        if ((scb = host->active) != NULL)
1186                                initio_next_state(host);
1187                        return;
1188                }
1189        }
1190        if (host->active != NULL)
1191                return;
1192
1193        if ((scb = initio_find_first_pend_scb(host)) == NULL)
1194                return;
1195
1196        /* program HBA's SCSI ID & target SCSI ID */
1197        outb((host->scsi_id << 4) | (scb->target & 0x0F),
1198                host->addr + TUL_SScsiId);
1199        if (scb->opcode == ExecSCSI) {
1200                active_tc = &host->targets[scb->target];
1201
1202                if (scb->tagmsg)
1203                        active_tc->drv_flags |= TCF_DRV_EN_TAG;
1204                else
1205                        active_tc->drv_flags &= ~TCF_DRV_EN_TAG;
1206
1207                outb(active_tc->js_period, host->addr + TUL_SPeriod);
1208                if ((active_tc->flags & (TCF_WDTR_DONE | TCF_NO_WDTR)) == 0) {  /* do wdtr negotiation          */
1209                        initio_select_atn_stop(host, scb);
1210                } else {
1211                        if ((active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0) {     /* do sync negotiation          */
1212                                initio_select_atn_stop(host, scb);
1213                        } else {
1214                                if (scb->tagmsg)
1215                                        initio_select_atn3(host, scb);
1216                                else
1217                                        initio_select_atn(host, scb);
1218                        }
1219                }
1220                if (scb->flags & SCF_POLL) {
1221                        while (wait_tulip(host) != -1) {
1222                                if (initio_next_state(host) == -1)
1223                                        break;
1224                        }
1225                }
1226        } else if (scb->opcode == BusDevRst) {
1227                initio_select_atn_stop(host, scb);
1228                scb->next_state = 8;
1229                if (scb->flags & SCF_POLL) {
1230                        while (wait_tulip(host) != -1) {
1231                                if (initio_next_state(host) == -1)
1232                                        break;
1233                        }
1234                }
1235        } else if (scb->opcode == AbortCmd) {
1236                if (initio_abort_srb(host, scb->srb) != 0) {
1237                        initio_unlink_pend_scb(host, scb);
1238                        initio_release_scb(host, scb);
1239                } else {
1240                        scb->opcode = BusDevRst;
1241                        initio_select_atn_stop(host, scb);
1242                        scb->next_state = 8;
1243                }
1244        } else {
1245                initio_unlink_pend_scb(host, scb);
1246                scb->hastat = 0x16;     /* bad command */
1247                initio_append_done_scb(host, scb);
1248        }
1249        return;
1250}
1251
1252/**
1253 *      initio_next_state               -       Next SCSI state
1254 *      @host: InitIO host we are processing
1255 *
1256 *      Progress the active command block along the state machine
1257 *      until we hit a state which we must wait for activity to occur.
1258 *
1259 *      Returns zero or a negative code.
1260 */
1261
1262static int initio_next_state(struct initio_host * host)
1263{
1264        int next;
1265
1266        next = host->active->next_state;
1267        for (;;) {
1268                switch (next) {
1269                case 1:
1270                        next = initio_state_1(host);
1271                        break;
1272                case 2:
1273                        next = initio_state_2(host);
1274                        break;
1275                case 3:
1276                        next = initio_state_3(host);
1277                        break;
1278                case 4:
1279                        next = initio_state_4(host);
1280                        break;
1281                case 5:
1282                        next = initio_state_5(host);
1283                        break;
1284                case 6:
1285                        next = initio_state_6(host);
1286                        break;
1287                case 7:
1288                        next = initio_state_7(host);
1289                        break;
1290                case 8:
1291                        return initio_bus_device_reset(host);
1292                default:
1293                        return initio_bad_seq(host);
1294                }
1295                if (next <= 0)
1296                        return next;
1297        }
1298}
1299
1300
1301/**
1302 *      initio_state_1          -       SCSI state machine
1303 *      @host: InitIO host we are controlling
1304 *
1305 *      Perform SCSI state processing for Select/Attention/Stop
1306 */
1307
1308static int initio_state_1(struct initio_host * host)
1309{
1310        struct scsi_ctrl_blk *scb = host->active;
1311        struct target_control *active_tc = host->active_tc;
1312#if DEBUG_STATE
1313        printk("-s1-");
1314#endif
1315
1316        /* Move the SCB from pending to busy */
1317        initio_unlink_pend_scb(host, scb);
1318        initio_append_busy_scb(host, scb);
1319
1320        outb(active_tc->sconfig0, host->addr + TUL_SConfig );
1321        /* ATN on */
1322        if (host->phase == MSG_OUT) {
1323                outb(TSC_EN_BUS_IN | TSC_HW_RESELECT, host->addr + TUL_SCtrl1);
1324                outb(scb->ident, host->addr + TUL_SFifo);
1325
1326                if (scb->tagmsg) {
1327                        outb(scb->tagmsg, host->addr + TUL_SFifo);
1328                        outb(scb->tagid, host->addr + TUL_SFifo);
1329                }
1330                if ((active_tc->flags & (TCF_WDTR_DONE | TCF_NO_WDTR)) == 0) {
1331                        active_tc->flags |= TCF_WDTR_DONE;
1332                        outb(MSG_EXTEND, host->addr + TUL_SFifo);
1333                        outb(2, host->addr + TUL_SFifo);        /* Extended msg length */
1334                        outb(3, host->addr + TUL_SFifo);        /* Sync request */
1335                        outb(1, host->addr + TUL_SFifo);        /* Start from 16 bits */
1336                } else if ((active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0) {
1337                        active_tc->flags |= TCF_SYNC_DONE;
1338                        outb(MSG_EXTEND, host->addr + TUL_SFifo);
1339                        outb(3, host->addr + TUL_SFifo);        /* extended msg length */
1340                        outb(1, host->addr + TUL_SFifo);        /* sync request */
1341                        outb(initio_rate_tbl[active_tc->flags & TCF_SCSI_RATE], host->addr + TUL_SFifo);
1342                        outb(MAX_OFFSET, host->addr + TUL_SFifo);       /* REQ/ACK offset */
1343                }
1344                outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1345                if (wait_tulip(host) == -1)
1346                        return -1;
1347        }
1348        outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1349        outb((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)), host->addr + TUL_SSignal);
1350        /* Into before CDB xfer */
1351        return 3;
1352}
1353
1354
1355/**
1356 *      initio_state_2          -       SCSI state machine
1357 *      @host: InitIO host we are controlling
1358 *
1359 * state after selection with attention
1360 * state after selection with attention3
1361 */
1362
1363static int initio_state_2(struct initio_host * host)
1364{
1365        struct scsi_ctrl_blk *scb = host->active;
1366        struct target_control *active_tc = host->active_tc;
1367#if DEBUG_STATE
1368        printk("-s2-");
1369#endif
1370
1371        initio_unlink_pend_scb(host, scb);
1372        initio_append_busy_scb(host, scb);
1373
1374        outb(active_tc->sconfig0, host->addr + TUL_SConfig);
1375
1376        if (host->jsstatus1 & TSS_CMD_PH_CMP)
1377                return 4;
1378
1379        outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1380        outb((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)), host->addr + TUL_SSignal);
1381        /* Into before CDB xfer */
1382        return 3;
1383}
1384
1385/**
1386 *      initio_state_3          -       SCSI state machine
1387 *      @host: InitIO host we are controlling
1388 *
1389 * state before CDB xfer is done
1390 */
1391
1392static int initio_state_3(struct initio_host * host)
1393{
1394        struct scsi_ctrl_blk *scb = host->active;
1395        struct target_control *active_tc = host->active_tc;
1396        int i;
1397
1398#if DEBUG_STATE
1399        printk("-s3-");
1400#endif
1401        for (;;) {
1402                switch (host->phase) {
1403                case CMD_OUT:   /* Command out phase            */
1404                        for (i = 0; i < (int) scb->cdblen; i++)
1405                                outb(scb->cdb[i], host->addr + TUL_SFifo);
1406                        outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1407                        if (wait_tulip(host) == -1)
1408                                return -1;
1409                        if (host->phase == CMD_OUT)
1410                                return initio_bad_seq(host);
1411                        return 4;
1412
1413                case MSG_IN:    /* Message in phase             */
1414                        scb->next_state = 3;
1415                        if (initio_msgin(host) == -1)
1416                                return -1;
1417                        break;
1418
1419                case STATUS_IN: /* Status phase                 */
1420                        if (initio_status_msg(host) == -1)
1421                                return -1;
1422                        break;
1423
1424                case MSG_OUT:   /* Message out phase            */
1425                        if (active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) {
1426                                outb(MSG_NOP, host->addr + TUL_SFifo);          /* msg nop */
1427                                outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1428                                if (wait_tulip(host) == -1)
1429                                        return -1;
1430                        } else {
1431                                active_tc->flags |= TCF_SYNC_DONE;
1432
1433                                outb(MSG_EXTEND, host->addr + TUL_SFifo);
1434                                outb(3, host->addr + TUL_SFifo);        /* ext. msg len */
1435                                outb(1, host->addr + TUL_SFifo);        /* sync request */
1436                                outb(initio_rate_tbl[active_tc->flags & TCF_SCSI_RATE], host->addr + TUL_SFifo);
1437                                outb(MAX_OFFSET, host->addr + TUL_SFifo);       /* REQ/ACK offset */
1438                                outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1439                                if (wait_tulip(host) == -1)
1440                                        return -1;
1441                                outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1442                                outb(inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7), host->addr + TUL_SSignal);
1443
1444                        }
1445                        break;
1446                default:
1447                        return initio_bad_seq(host);
1448                }
1449        }
1450}
1451
1452/**
1453 *      initio_state_4          -       SCSI state machine
1454 *      @host: InitIO host we are controlling
1455 *
1456 *      SCSI state machine. State 4
1457 */
1458
1459static int initio_state_4(struct initio_host * host)
1460{
1461        struct scsi_ctrl_blk *scb = host->active;
1462
1463#if DEBUG_STATE
1464        printk("-s4-");
1465#endif
1466        if ((scb->flags & SCF_DIR) == SCF_NO_XF) {
1467                return 6;       /* Go to state 6 (After data) */
1468        }
1469        for (;;) {
1470                if (scb->buflen == 0)
1471                        return 6;
1472
1473                switch (host->phase) {
1474
1475                case STATUS_IN: /* Status phase                 */
1476                        if ((scb->flags & SCF_DIR) != 0)        /* if direction bit set then report data underrun */
1477                                scb->hastat = HOST_DO_DU;
1478                        if ((initio_status_msg(host)) == -1)
1479                                return -1;
1480                        break;
1481
1482                case MSG_IN:    /* Message in phase             */
1483                        scb->next_state = 0x4;
1484                        if (initio_msgin(host) == -1)
1485                                return -1;
1486                        break;
1487
1488                case MSG_OUT:   /* Message out phase            */
1489                        if (host->jsstatus0 & TSS_PAR_ERROR) {
1490                                scb->buflen = 0;
1491                                scb->hastat = HOST_DO_DU;
1492                                if (initio_msgout_ide(host) == -1)
1493                                        return -1;
1494                                return 6;
1495                        } else {
1496                                outb(MSG_NOP, host->addr + TUL_SFifo);          /* msg nop */
1497                                outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1498                                if (wait_tulip(host) == -1)
1499                                        return -1;
1500                        }
1501                        break;
1502
1503                case DATA_IN:   /* Data in phase                */
1504                        return initio_xfer_data_in(host);
1505
1506                case DATA_OUT:  /* Data out phase               */
1507                        return initio_xfer_data_out(host);
1508
1509                default:
1510                        return initio_bad_seq(host);
1511                }
1512        }
1513}
1514
1515
1516/**
1517 *      initio_state_5          -       SCSI state machine
1518 *      @host: InitIO host we are controlling
1519 *
1520 *      State after dma xfer done or phase change before xfer done
1521 */
1522
1523static int initio_state_5(struct initio_host * host)
1524{
1525        struct scsi_ctrl_blk *scb = host->active;
1526        long cnt, xcnt;         /* cannot use unsigned !! code: if (xcnt < 0) */
1527
1528#if DEBUG_STATE
1529        printk("-s5-");
1530#endif
1531        /*------ get remaining count -------*/
1532        cnt = inl(host->addr + TUL_SCnt0) & 0x0FFFFFF;
1533
1534        if (inb(host->addr + TUL_XCmd) & 0x20) {
1535                /* ----------------------- DATA_IN ----------------------------- */
1536                /* check scsi parity error */
1537                if (host->jsstatus0 & TSS_PAR_ERROR)
1538                        scb->hastat = HOST_DO_DU;
1539                if (inb(host->addr + TUL_XStatus) & XPEND) {    /* DMA xfer pending, Send STOP  */
1540                        /* tell Hardware  scsi xfer has been terminated */
1541                        outb(inb(host->addr + TUL_XCtrl) | 0x80, host->addr + TUL_XCtrl);
1542                        /* wait until DMA xfer not pending */
1543                        while (inb(host->addr + TUL_XStatus) & XPEND)
1544                                cpu_relax();
1545                }
1546        } else {
1547                /*-------- DATA OUT -----------*/
1548                if ((inb(host->addr + TUL_SStatus1) & TSS_XFER_CMP) == 0) {
1549                        if (host->active_tc->js_period & TSC_WIDE_SCSI)
1550                                cnt += (inb(host->addr + TUL_SFifoCnt) & 0x1F) << 1;
1551                        else
1552                                cnt += (inb(host->addr + TUL_SFifoCnt) & 0x1F);
1553                }
1554                if (inb(host->addr + TUL_XStatus) & XPEND) {    /* if DMA xfer is pending, abort DMA xfer */
1555                        outb(TAX_X_ABT, host->addr + TUL_XCmd);
1556                        /* wait Abort DMA xfer done */
1557                        while ((inb(host->addr + TUL_Int) & XABT) == 0)
1558                                cpu_relax();
1559                }
1560                if ((cnt == 1) && (host->phase == DATA_OUT)) {
1561                        outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1562                        if (wait_tulip(host) == -1)
1563                                return -1;
1564                        cnt = 0;
1565                } else {
1566                        if ((inb(host->addr + TUL_SStatus1) & TSS_XFER_CMP) == 0)
1567                                outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1568                }
1569        }
1570        if (cnt == 0) {
1571                scb->buflen = 0;
1572                return 6;       /* After Data */
1573        }
1574        /* Update active data pointer */
1575        xcnt = (long) scb->buflen - cnt;        /* xcnt== bytes already xferred */
1576        scb->buflen = (u32) cnt;                /* cnt == bytes left to be xferred */
1577        if (scb->flags & SCF_SG) {
1578                struct sg_entry *sgp;
1579                unsigned long i;
1580
1581                sgp = &scb->sglist[scb->sgidx];
1582                for (i = scb->sgidx; i < scb->sgmax; sgp++, i++) {
1583                        xcnt -= (long) sgp->len;
1584                        if (xcnt < 0) {         /* this sgp xfer half done */
1585                                xcnt += (long) sgp->len;        /* xcnt == bytes xferred in this sgp */
1586                                sgp->data += (u32) xcnt;        /* new ptr to be xfer */
1587                                sgp->len -= (u32) xcnt; /* new len to be xfer */
1588                                scb->bufptr += ((u32) (i - scb->sgidx) << 3);
1589                                /* new SG table ptr */
1590                                scb->sglen = (u8) (scb->sgmax - i);
1591                                /* new SG table len */
1592                                scb->sgidx = (u16) i;
1593                                /* for next disc and come in this loop */
1594                                return 4;       /* Go to state 4                */
1595                        }
1596                        /* else (xcnt >= 0 , i.e. this sgp already xferred */
1597                }               /* for */
1598                return 6;       /* Go to state 6                */
1599        } else {
1600                scb->bufptr += (u32) xcnt;
1601        }
1602        return 4;               /* Go to state 4                */
1603}
1604
1605/**
1606 *      initio_state_6          -       SCSI state machine
1607 *      @host: InitIO host we are controlling
1608 *
1609 *      State after Data phase
1610 */
1611
1612static int initio_state_6(struct initio_host * host)
1613{
1614        struct scsi_ctrl_blk *scb = host->active;
1615
1616#if DEBUG_STATE
1617        printk("-s6-");
1618#endif
1619        for (;;) {
1620                switch (host->phase) {
1621                case STATUS_IN: /* Status phase                 */
1622                        if ((initio_status_msg(host)) == -1)
1623                                return -1;
1624                        break;
1625
1626                case MSG_IN:    /* Message in phase             */
1627                        scb->next_state = 6;
1628                        if ((initio_msgin(host)) == -1)
1629                                return -1;
1630                        break;
1631
1632                case MSG_OUT:   /* Message out phase            */
1633                        outb(MSG_NOP, host->addr + TUL_SFifo);          /* msg nop */
1634                        outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1635                        if (wait_tulip(host) == -1)
1636                                return -1;
1637                        break;
1638
1639                case DATA_IN:   /* Data in phase                */
1640                        return initio_xpad_in(host);
1641
1642                case DATA_OUT:  /* Data out phase               */
1643                        return initio_xpad_out(host);
1644
1645                default:
1646                        return initio_bad_seq(host);
1647                }
1648        }
1649}
1650
1651/**
1652 *      initio_state_7          -       SCSI state machine
1653 *      @host: InitIO host we are controlling
1654 *
1655 */
1656
1657int initio_state_7(struct initio_host * host)
1658{
1659        int cnt, i;
1660
1661#if DEBUG_STATE
1662        printk("-s7-");
1663#endif
1664        /* flush SCSI FIFO */
1665        cnt = inb(host->addr + TUL_SFifoCnt) & 0x1F;
1666        if (cnt) {
1667                for (i = 0; i < cnt; i++)
1668                        inb(host->addr + TUL_SFifo);
1669        }
1670        switch (host->phase) {
1671        case DATA_IN:           /* Data in phase                */
1672        case DATA_OUT:          /* Data out phase               */
1673                return initio_bad_seq(host);
1674        default:
1675                return 6;       /* Go to state 6                */
1676        }
1677}
1678
1679/**
1680 *      initio_xfer_data_in     -       Commence data input
1681 *      @host: InitIO host in use
1682 *
1683 *      Commence a block of data transfer. The transfer itself will
1684 *      be managed by the controller and we will get a completion (or
1685 *      failure) interrupt.
1686 */
1687static int initio_xfer_data_in(struct initio_host * host)
1688{
1689        struct scsi_ctrl_blk *scb = host->active;
1690
1691        if ((scb->flags & SCF_DIR) == SCF_DOUT)
1692                return 6;       /* wrong direction */
1693
1694        outl(scb->buflen, host->addr + TUL_SCnt0);
1695        outb(TSC_XF_DMA_IN, host->addr + TUL_SCmd);     /* 7/25/95 */
1696
1697        if (scb->flags & SCF_SG) {      /* S/G xfer */
1698                outl(((u32) scb->sglen) << 3, host->addr + TUL_XCntH);
1699                outl(scb->bufptr, host->addr + TUL_XAddH);
1700                outb(TAX_SG_IN, host->addr + TUL_XCmd);
1701        } else {
1702                outl(scb->buflen, host->addr + TUL_XCntH);
1703                outl(scb->bufptr, host->addr + TUL_XAddH);
1704                outb(TAX_X_IN, host->addr + TUL_XCmd);
1705        }
1706        scb->next_state = 0x5;
1707        return 0;               /* return to OS, wait xfer done , let jas_isr come in */
1708}
1709
1710/**
1711 *      initio_xfer_data_out    -       Commence data output
1712 *      @host: InitIO host in use
1713 *
1714 *      Commence a block of data transfer. The transfer itself will
1715 *      be managed by the controller and we will get a completion (or
1716 *      failure) interrupt.
1717 */
1718
1719static int initio_xfer_data_out(struct initio_host * host)
1720{
1721        struct scsi_ctrl_blk *scb = host->active;
1722
1723        if ((scb->flags & SCF_DIR) == SCF_DIN)
1724                return 6;       /* wrong direction */
1725
1726        outl(scb->buflen, host->addr + TUL_SCnt0);
1727        outb(TSC_XF_DMA_OUT, host->addr + TUL_SCmd);
1728
1729        if (scb->flags & SCF_SG) {      /* S/G xfer */
1730                outl(((u32) scb->sglen) << 3, host->addr + TUL_XCntH);
1731                outl(scb->bufptr, host->addr + TUL_XAddH);
1732                outb(TAX_SG_OUT, host->addr + TUL_XCmd);
1733        } else {
1734                outl(scb->buflen, host->addr + TUL_XCntH);
1735                outl(scb->bufptr, host->addr + TUL_XAddH);
1736                outb(TAX_X_OUT, host->addr + TUL_XCmd);
1737        }
1738
1739        scb->next_state = 0x5;
1740        return 0;               /* return to OS, wait xfer done , let jas_isr come in */
1741}
1742
1743int initio_xpad_in(struct initio_host * host)
1744{
1745        struct scsi_ctrl_blk *scb = host->active;
1746        struct target_control *active_tc = host->active_tc;
1747
1748        if ((scb->flags & SCF_DIR) != SCF_NO_DCHK)
1749                scb->hastat = HOST_DO_DU;       /* over run             */
1750        for (;;) {
1751                if (active_tc->js_period & TSC_WIDE_SCSI)
1752                        outl(2, host->addr + TUL_SCnt0);
1753                else
1754                        outl(1, host->addr + TUL_SCnt0);
1755
1756                outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
1757                if (wait_tulip(host) == -1)
1758                        return -1;
1759                if (host->phase != DATA_IN) {
1760                        outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1761                        return 6;
1762                }
1763                inb(host->addr + TUL_SFifo);
1764        }
1765}
1766
1767int initio_xpad_out(struct initio_host * host)
1768{
1769        struct scsi_ctrl_blk *scb = host->active;
1770        struct target_control *active_tc = host->active_tc;
1771
1772        if ((scb->flags & SCF_DIR) != SCF_NO_DCHK)
1773                scb->hastat = HOST_DO_DU;       /* over run             */
1774        for (;;) {
1775                if (active_tc->js_period & TSC_WIDE_SCSI)
1776                        outl(2, host->addr + TUL_SCnt0);
1777                else
1778                        outl(1, host->addr + TUL_SCnt0);
1779
1780                outb(0, host->addr + TUL_SFifo);
1781                outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1782                if ((wait_tulip(host)) == -1)
1783                        return -1;
1784                if (host->phase != DATA_OUT) {  /* Disable wide CPU to allow read 16 bits */
1785                        outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1);
1786                        outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1787                        return 6;
1788                }
1789        }
1790}
1791
1792int initio_status_msg(struct initio_host * host)
1793{                               /* status & MSG_IN */
1794        struct scsi_ctrl_blk *scb = host->active;
1795        u8 msg;
1796
1797        outb(TSC_CMD_COMP, host->addr + TUL_SCmd);
1798        if (wait_tulip(host) == -1)
1799                return -1;
1800
1801        /* get status */
1802        scb->tastat = inb(host->addr + TUL_SFifo);
1803
1804        if (host->phase == MSG_OUT) {
1805                if (host->jsstatus0 & TSS_PAR_ERROR)
1806                        outb(MSG_PARITY, host->addr + TUL_SFifo);
1807                else
1808                        outb(MSG_NOP, host->addr + TUL_SFifo);
1809                outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1810                return wait_tulip(host);
1811        }
1812        if (host->phase == MSG_IN) {
1813                msg = inb(host->addr + TUL_SFifo);
1814                if (host->jsstatus0 & TSS_PAR_ERROR) {  /* Parity error                 */
1815                        if ((initio_msgin_accept(host)) == -1)
1816                                return -1;
1817                        if (host->phase != MSG_OUT)
1818                                return initio_bad_seq(host);
1819                        outb(MSG_PARITY, host->addr + TUL_SFifo);
1820                        outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1821                        return wait_tulip(host);
1822                }
1823                if (msg == 0) { /* Command complete             */
1824
1825                        if ((scb->tastat & 0x18) == 0x10)       /* No link support              */
1826                                return initio_bad_seq(host);
1827                        outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1828                        outb(TSC_MSG_ACCEPT, host->addr + TUL_SCmd);
1829                        return initio_wait_done_disc(host);
1830
1831                }
1832                if (msg == MSG_LINK_COMP || msg == MSG_LINK_FLAG) {
1833                        if ((scb->tastat & 0x18) == 0x10)
1834                                return initio_msgin_accept(host);
1835                }
1836        }
1837        return initio_bad_seq(host);
1838}
1839
1840
1841/* scsi bus free */
1842int int_initio_busfree(struct initio_host * host)
1843{
1844        struct scsi_ctrl_blk *scb = host->active;
1845
1846        if (scb != NULL) {
1847                if (scb->status & SCB_SELECT) {         /* selection timeout */
1848                        initio_unlink_pend_scb(host, scb);
1849                        scb->hastat = HOST_SEL_TOUT;
1850                        initio_append_done_scb(host, scb);
1851                } else {        /* Unexpected bus free          */
1852                        initio_unlink_busy_scb(host, scb);
1853                        scb->hastat = HOST_BUS_FREE;
1854                        initio_append_done_scb(host, scb);
1855                }
1856                host->active = NULL;
1857                host->active_tc = NULL;
1858        }
1859        outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);          /* Flush SCSI FIFO  */
1860        outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
1861        outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect       */
1862        return -1;
1863}
1864
1865
1866/**
1867 *      int_initio_scsi_rst     -       SCSI reset occurred
1868 *      @host: Host seeing the reset
1869 *
1870 *      A SCSI bus reset has occurred. Clean up any pending transfer
1871 *      the hardware is doing by DMA and then abort all active and
1872 *      disconnected commands. The mid layer should sort the rest out
1873 *      for us
1874 */
1875
1876static int int_initio_scsi_rst(struct initio_host * host)
1877{
1878        struct scsi_ctrl_blk *scb;
1879        int i;
1880
1881        /* if DMA xfer is pending, abort DMA xfer */
1882        if (inb(host->addr + TUL_XStatus) & 0x01) {
1883                outb(TAX_X_ABT | TAX_X_CLR_FIFO, host->addr + TUL_XCmd);
1884                /* wait Abort DMA xfer done */
1885                while ((inb(host->addr + TUL_Int) & 0x04) == 0)
1886                        cpu_relax();
1887                outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1888        }
1889        /* Abort all active & disconnected scb */
1890        while ((scb = initio_pop_busy_scb(host)) != NULL) {
1891                scb->hastat = HOST_BAD_PHAS;
1892                initio_append_done_scb(host, scb);
1893        }
1894        host->active = NULL;
1895        host->active_tc = NULL;
1896
1897        /* clr sync nego. done flag */
1898        for (i = 0; i < host->max_tar; i++)
1899                host->targets[i].flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
1900        return -1;
1901}
1902
1903/**
1904 *      int_initio_scsi_resel   -       Reselection occurred
1905 *      @host: InitIO host adapter
1906 *
1907 *      A SCSI reselection event has been signalled and the interrupt
1908 *      is now being processed. Work out which command block needs attention
1909 *      and continue processing that command.
1910 */
1911
1912int int_initio_resel(struct initio_host * host)
1913{
1914        struct scsi_ctrl_blk *scb;
1915        struct target_control *active_tc;
1916        u8 tag, msg = 0;
1917        u8 tar, lun;
1918
1919        if ((scb = host->active) != NULL) {
1920                /* FIXME: Why check and not just clear ? */
1921                if (scb->status & SCB_SELECT)           /* if waiting for selection complete */
1922                        scb->status &= ~SCB_SELECT;
1923                host->active = NULL;
1924        }
1925        /* --------- get target id---------------------- */
1926        tar = inb(host->addr + TUL_SBusId);
1927        /* ------ get LUN from Identify message----------- */
1928        lun = inb(host->addr + TUL_SIdent) & 0x0F;
1929        /* 07/22/98 from 0x1F -> 0x0F */
1930        active_tc = &host->targets[tar];
1931        host->active_tc = active_tc;
1932        outb(active_tc->sconfig0, host->addr + TUL_SConfig);
1933        outb(active_tc->js_period, host->addr + TUL_SPeriod);
1934
1935        /* ------------- tag queueing ? ------------------- */
1936        if (active_tc->drv_flags & TCF_DRV_EN_TAG) {
1937                if ((initio_msgin_accept(host)) == -1)
1938                        return -1;
1939                if (host->phase != MSG_IN)
1940                        goto no_tag;
1941                outl(1, host->addr + TUL_SCnt0);
1942                outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
1943                if (wait_tulip(host) == -1)
1944                        return -1;
1945                msg = inb(host->addr + TUL_SFifo);      /* Read Tag Message    */
1946
1947                if (msg < MSG_STAG || msg > MSG_OTAG)           /* Is simple Tag      */
1948                        goto no_tag;
1949
1950                if (initio_msgin_accept(host) == -1)
1951                        return -1;
1952
1953                if (host->phase != MSG_IN)
1954                        goto no_tag;
1955
1956                outl(1, host->addr + TUL_SCnt0);
1957                outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
1958                if (wait_tulip(host) == -1)
1959                        return -1;
1960                tag = inb(host->addr + TUL_SFifo);      /* Read Tag ID       */
1961                scb = host->scb + tag;
1962                if (scb->target != tar || scb->lun != lun) {
1963                        return initio_msgout_abort_tag(host);
1964                }
1965                if (scb->status != SCB_BUSY) {  /* 03/24/95             */
1966                        return initio_msgout_abort_tag(host);
1967                }
1968                host->active = scb;
1969                if ((initio_msgin_accept(host)) == -1)
1970                        return -1;
1971        } else {                /* No tag               */
1972              no_tag:
1973                if ((scb = initio_find_busy_scb(host, tar | (lun << 8))) == NULL) {
1974                        return initio_msgout_abort_targ(host);
1975                }
1976                host->active = scb;
1977                if (!(active_tc->drv_flags & TCF_DRV_EN_TAG)) {
1978                        if ((initio_msgin_accept(host)) == -1)
1979                                return -1;
1980                }
1981        }
1982        return 0;
1983}
1984
1985/**
1986 *      int_initio_bad_seq              -       out of phase
1987 *      @host: InitIO host flagging event
1988 *
1989 *      We have ended up out of phase somehow. Reset the host controller
1990 *      and throw all our toys out of the pram. Let the midlayer clean up
1991 */
1992
1993static int int_initio_bad_seq(struct initio_host * host)
1994{                               /* target wrong phase           */
1995        struct scsi_ctrl_blk *scb;
1996        int i;
1997
1998        initio_reset_scsi(host, 10);
1999
2000        while ((scb = initio_pop_busy_scb(host)) != NULL) {
2001                scb->hastat = HOST_BAD_PHAS;
2002                initio_append_done_scb(host, scb);
2003        }
2004        for (i = 0; i < host->max_tar; i++)
2005                host->targets[i].flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
2006        return -1;
2007}
2008
2009
2010/**
2011 *      initio_msgout_abort_targ                -       abort a tag
2012 *      @host: InitIO host
2013 *
2014 *      Abort when the target/lun does not match or when our SCB is not
2015 *      busy. Used by untagged commands.
2016 */
2017
2018static int initio_msgout_abort_targ(struct initio_host * host)
2019{
2020
2021        outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
2022        if (initio_msgin_accept(host) == -1)
2023                return -1;
2024        if (host->phase != MSG_OUT)
2025                return initio_bad_seq(host);
2026
2027        outb(MSG_ABORT, host->addr + TUL_SFifo);
2028        outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2029
2030        return initio_wait_disc(host);
2031}
2032
2033/**
2034 *      initio_msgout_abort_tag         -       abort a tag
2035 *      @host: InitIO host
2036 *
2037 *      Abort when the target/lun does not match or when our SCB is not
2038 *      busy. Used for tagged commands.
2039 */
2040
2041static int initio_msgout_abort_tag(struct initio_host * host)
2042{
2043
2044        outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
2045        if (initio_msgin_accept(host) == -1)
2046                return -1;
2047        if (host->phase != MSG_OUT)
2048                return initio_bad_seq(host);
2049
2050        outb(MSG_ABORT_TAG, host->addr + TUL_SFifo);
2051        outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2052
2053        return initio_wait_disc(host);
2054
2055}
2056
2057/**
2058 *      initio_msgin            -       Message in
2059 *      @host: InitIO Host
2060 *
2061 *      Process incoming message
2062 */
2063static int initio_msgin(struct initio_host * host)
2064{
2065        struct target_control *active_tc;
2066
2067        for (;;) {
2068                outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
2069
2070                outl(1, host->addr + TUL_SCnt0);
2071                outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
2072                if (wait_tulip(host) == -1)
2073                        return -1;
2074
2075                switch (inb(host->addr + TUL_SFifo)) {
2076                case MSG_DISC:  /* Disconnect msg */
2077                        outb(TSC_MSG_ACCEPT, host->addr + TUL_SCmd);
2078                        return initio_wait_disc(host);
2079                case MSG_SDP:
2080                case MSG_RESTORE:
2081                case MSG_NOP:
2082                        initio_msgin_accept(host);
2083                        break;
2084                case MSG_REJ:   /* Clear ATN first              */
2085                        outb((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)),
2086                                host->addr + TUL_SSignal);
2087                        active_tc = host->active_tc;
2088                        if ((active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0)       /* do sync nego */
2089                                outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN),
2090                                        host->addr + TUL_SSignal);
2091                        initio_msgin_accept(host);
2092                        break;
2093                case MSG_EXTEND:        /* extended msg */
2094                        initio_msgin_extend(host);
2095                        break;
2096                case MSG_IGNOREWIDE:
2097                        initio_msgin_accept(host);
2098                        break;
2099                case MSG_COMP:
2100                        outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
2101                        outb(TSC_MSG_ACCEPT, host->addr + TUL_SCmd);
2102                        return initio_wait_done_disc(host);
2103                default:
2104                        initio_msgout_reject(host);
2105                        break;
2106                }
2107                if (host->phase != MSG_IN)
2108                        return host->phase;
2109        }
2110        /* statement won't reach here */
2111}
2112
2113static int initio_msgout_reject(struct initio_host * host)
2114{
2115        outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
2116
2117        if (initio_msgin_accept(host) == -1)
2118                return -1;
2119
2120        if (host->phase == MSG_OUT) {
2121                outb(MSG_REJ, host->addr + TUL_SFifo);          /* Msg reject           */
2122                outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2123                return wait_tulip(host);
2124        }
2125        return host->phase;
2126}
2127
2128static int initio_msgout_ide(struct initio_host * host)
2129{
2130        outb(MSG_IDE, host->addr + TUL_SFifo);          /* Initiator Detected Error */
2131        outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2132        return wait_tulip(host);
2133}
2134
2135static int initio_msgin_extend(struct initio_host * host)
2136{
2137        u8 len, idx;
2138
2139        if (initio_msgin_accept(host) != MSG_IN)
2140                return host->phase;
2141
2142        /* Get extended msg length      */
2143        outl(1, host->addr + TUL_SCnt0);
2144        outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
2145        if (wait_tulip(host) == -1)
2146                return -1;
2147
2148        len = inb(host->addr + TUL_SFifo);
2149        host->msg[0] = len;
2150        for (idx = 1; len != 0; len--) {
2151
2152                if ((initio_msgin_accept(host)) != MSG_IN)
2153                        return host->phase;
2154                outl(1, host->addr + TUL_SCnt0);
2155                outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
2156                if (wait_tulip(host) == -1)
2157                        return -1;
2158                host->msg[idx++] = inb(host->addr + TUL_SFifo);
2159        }
2160        if (host->msg[1] == 1) {                /* if it's synchronous data transfer request */
2161                u8 r;
2162                if (host->msg[0] != 3)  /* if length is not right */
2163                        return initio_msgout_reject(host);
2164                if (host->active_tc->flags & TCF_NO_SYNC_NEGO) {        /* Set OFFSET=0 to do async, nego back */
2165                        host->msg[3] = 0;
2166                } else {
2167                        if (initio_msgin_sync(host) == 0 &&
2168                            (host->active_tc->flags & TCF_SYNC_DONE)) {
2169                                initio_sync_done(host);
2170                                return initio_msgin_accept(host);
2171                        }
2172                }
2173
2174                r = inb(host->addr + TUL_SSignal);
2175                outb((r & (TSC_SET_ACK | 7)) | TSC_SET_ATN,
2176                        host->addr + TUL_SSignal);
2177                if (initio_msgin_accept(host) != MSG_OUT)
2178                        return host->phase;
2179                /* sync msg out */
2180                outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
2181
2182                initio_sync_done(host);
2183
2184                outb(MSG_EXTEND, host->addr + TUL_SFifo);
2185                outb(3, host->addr + TUL_SFifo);
2186                outb(1, host->addr + TUL_SFifo);
2187                outb(host->msg[2], host->addr + TUL_SFifo);
2188                outb(host->msg[3], host->addr + TUL_SFifo);
2189                outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2190                return wait_tulip(host);
2191        }
2192        if (host->msg[0] != 2 || host->msg[1] != 3)
2193                return initio_msgout_reject(host);
2194        /* if it's WIDE DATA XFER REQ   */
2195        if (host->active_tc->flags & TCF_NO_WDTR) {
2196                host->msg[2] = 0;
2197        } else {
2198                if (host->msg[2] > 2)   /* > 32 bits            */
2199                        return initio_msgout_reject(host);
2200                if (host->msg[2] == 2) {                /* == 32                */
2201                        host->msg[2] = 1;
2202                } else {
2203                        if ((host->active_tc->flags & TCF_NO_WDTR) == 0) {
2204                                wdtr_done(host);
2205                                if ((host->active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0)
2206                                        outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
2207                                return initio_msgin_accept(host);
2208                        }
2209                }
2210        }
2211        outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
2212
2213        if (initio_msgin_accept(host) != MSG_OUT)
2214                return host->phase;
2215        /* WDTR msg out                 */
2216        outb(MSG_EXTEND, host->addr + TUL_SFifo);
2217        outb(2, host->addr + TUL_SFifo);
2218        outb(3, host->addr + TUL_SFifo);
2219        outb(host->msg[2], host->addr + TUL_SFifo);
2220        outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2221        return wait_tulip(host);
2222}
2223
2224static int initio_msgin_sync(struct initio_host * host)
2225{
2226        char default_period;
2227
2228        default_period = initio_rate_tbl[host->active_tc->flags & TCF_SCSI_RATE];
2229        if (host->msg[3] > MAX_OFFSET) {
2230                host->msg[3] = MAX_OFFSET;
2231                if (host->msg[2] < default_period) {
2232                        host->msg[2] = default_period;
2233                        return 1;
2234                }
2235                if (host->msg[2] >= 59) /* Change to async              */
2236                        host->msg[3] = 0;
2237                return 1;
2238        }
2239        /* offset requests asynchronous transfers ? */
2240        if (host->msg[3] == 0) {
2241                return 0;
2242        }
2243        if (host->msg[2] < default_period) {
2244                host->msg[2] = default_period;
2245                return 1;
2246        }
2247        if (host->msg[2] >= 59) {
2248                host->msg[3] = 0;
2249                return 1;
2250        }
2251        return 0;
2252}
2253
2254static int wdtr_done(struct initio_host * host)
2255{
2256        host->active_tc->flags &= ~TCF_SYNC_DONE;
2257        host->active_tc->flags |= TCF_WDTR_DONE;
2258
2259        host->active_tc->js_period = 0;
2260        if (host->msg[2])       /* if 16 bit */
2261                host->active_tc->js_period |= TSC_WIDE_SCSI;
2262        host->active_tc->sconfig0 &= ~TSC_ALT_PERIOD;
2263        outb(host->active_tc->sconfig0, host->addr + TUL_SConfig);
2264        outb(host->active_tc->js_period, host->addr + TUL_SPeriod);
2265
2266        return 1;
2267}
2268
2269static int initio_sync_done(struct initio_host * host)
2270{
2271        int i;
2272
2273        host->active_tc->flags |= TCF_SYNC_DONE;
2274
2275        if (host->msg[3]) {
2276                host->active_tc->js_period |= host->msg[3];
2277                for (i = 0; i < 8; i++) {
2278                        if (initio_rate_tbl[i] >= host->msg[2]) /* pick the big one */
2279                                break;
2280                }
2281                host->active_tc->js_period |= (i << 4);
2282                host->active_tc->sconfig0 |= TSC_ALT_PERIOD;
2283        }
2284        outb(host->active_tc->sconfig0, host->addr + TUL_SConfig);
2285        outb(host->active_tc->js_period, host->addr + TUL_SPeriod);
2286
2287        return -1;
2288}
2289
2290
2291static int initio_post_scsi_rst(struct initio_host * host)
2292{
2293        struct scsi_ctrl_blk *scb;
2294        struct target_control *active_tc;
2295        int i;
2296
2297        host->active = NULL;
2298        host->active_tc = NULL;
2299        host->flags = 0;
2300
2301        while ((scb = initio_pop_busy_scb(host)) != NULL) {
2302                scb->hastat = HOST_BAD_PHAS;
2303                initio_append_done_scb(host, scb);
2304        }
2305        /* clear sync done flag         */
2306        active_tc = &host->targets[0];
2307        for (i = 0; i < host->max_tar; active_tc++, i++) {
2308                active_tc->flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
2309                /* Initialize the sync. xfer register values to an asyn xfer */
2310                active_tc->js_period = 0;
2311                active_tc->sconfig0 = host->sconf1;
2312                host->act_tags[0] = 0;  /* 07/22/98 */
2313                host->targets[i].flags &= ~TCF_BUSY;    /* 07/22/98 */
2314        }                       /* for */
2315
2316        return -1;
2317}
2318
2319static void initio_select_atn_stop(struct initio_host * host, struct scsi_ctrl_blk * scb)
2320{
2321        scb->status |= SCB_SELECT;
2322        scb->next_state = 0x1;
2323        host->active = scb;
2324        host->active_tc = &host->targets[scb->target];
2325        outb(TSC_SELATNSTOP, host->addr + TUL_SCmd);
2326}
2327
2328
2329static void initio_select_atn(struct initio_host * host, struct scsi_ctrl_blk * scb)
2330{
2331        int i;
2332
2333        scb->status |= SCB_SELECT;
2334        scb->next_state = 0x2;
2335
2336        outb(scb->ident, host->addr + TUL_SFifo);
2337        for (i = 0; i < (int) scb->cdblen; i++)
2338                outb(scb->cdb[i], host->addr + TUL_SFifo);
2339        host->active_tc = &host->targets[scb->target];
2340        host->active = scb;
2341        outb(TSC_SEL_ATN, host->addr + TUL_SCmd);
2342}
2343
2344static void initio_select_atn3(struct initio_host * host, struct scsi_ctrl_blk * scb)
2345{
2346        int i;
2347
2348        scb->status |= SCB_SELECT;
2349        scb->next_state = 0x2;
2350
2351        outb(scb->ident, host->addr + TUL_SFifo);
2352        outb(scb->tagmsg, host->addr + TUL_SFifo);
2353        outb(scb->tagid, host->addr + TUL_SFifo);
2354        for (i = 0; i < scb->cdblen; i++)
2355                outb(scb->cdb[i], host->addr + TUL_SFifo);
2356        host->active_tc = &host->targets[scb->target];
2357        host->active = scb;
2358        outb(TSC_SEL_ATN3, host->addr + TUL_SCmd);
2359}
2360
2361/**
2362 *      initio_bus_device_reset -        SCSI Bus Device Reset
2363 *      @host: InitIO host to reset
2364 *
2365 *      Perform a device reset and abort all pending SCBs for the
2366 *      victim device
2367 */
2368int initio_bus_device_reset(struct initio_host * host)
2369{
2370        struct scsi_ctrl_blk *scb = host->active;
2371        struct target_control *active_tc = host->active_tc;
2372        struct scsi_ctrl_blk *tmp, *prev;
2373        u8 tar;
2374
2375        if (host->phase != MSG_OUT)
2376                return int_initio_bad_seq(host);        /* Unexpected phase */
2377
2378        initio_unlink_pend_scb(host, scb);
2379        initio_release_scb(host, scb);
2380
2381
2382        tar = scb->target;      /* target                       */
2383        active_tc->flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE | TCF_BUSY);
2384        /* clr sync. nego & WDTR flags  07/22/98 */
2385
2386        /* abort all SCB with same target */
2387        prev = tmp = host->first_busy;  /* Check Busy queue */
2388        while (tmp != NULL) {
2389                if (tmp->target == tar) {
2390                        /* unlink it */
2391                        if (tmp == host->first_busy) {
2392                                if ((host->first_busy = tmp->next) == NULL)
2393                                        host->last_busy = NULL;
2394                        } else {
2395                                prev->next = tmp->next;
2396                                if (tmp == host->last_busy)
2397                                        host->last_busy = prev;
2398                        }
2399                        tmp->hastat = HOST_ABORTED;
2400                        initio_append_done_scb(host, tmp);
2401                }
2402                /* Previous haven't change      */
2403                else {
2404                        prev = tmp;
2405                }
2406                tmp = tmp->next;
2407        }
2408        outb(MSG_DEVRST, host->addr + TUL_SFifo);
2409        outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2410        return initio_wait_disc(host);
2411
2412}
2413
2414static int initio_msgin_accept(struct initio_host * host)
2415{
2416        outb(TSC_MSG_ACCEPT, host->addr + TUL_SCmd);
2417        return wait_tulip(host);
2418}
2419
2420static int wait_tulip(struct initio_host * host)
2421{
2422
2423        while (!((host->jsstatus0 = inb(host->addr + TUL_SStatus0))
2424                 & TSS_INT_PENDING))
2425                        cpu_relax();
2426
2427        host->jsint = inb(host->addr + TUL_SInt);
2428        host->phase = host->jsstatus0 & TSS_PH_MASK;
2429        host->jsstatus1 = inb(host->addr + TUL_SStatus1);
2430
2431        if (host->jsint & TSS_RESEL_INT)        /* if SCSI bus reset detected */
2432                return int_initio_resel(host);
2433        if (host->jsint & TSS_SEL_TIMEOUT)      /* if selected/reselected timeout interrupt */
2434                return int_initio_busfree(host);
2435        if (host->jsint & TSS_SCSIRST_INT)      /* if SCSI bus reset detected   */
2436                return int_initio_scsi_rst(host);
2437
2438        if (host->jsint & TSS_DISC_INT) {       /* BUS disconnection            */
2439                if (host->flags & HCF_EXPECT_DONE_DISC) {
2440                        outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */
2441                        initio_unlink_busy_scb(host, host->active);
2442                        host->active->hastat = 0;
2443                        initio_append_done_scb(host, host->active);
2444                        host->active = NULL;
2445                        host->active_tc = NULL;
2446                        host->flags &= ~HCF_EXPECT_DONE_DISC;
2447                        outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
2448                        outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */
2449                        return -1;
2450                }
2451                if (host->flags & HCF_EXPECT_DISC) {
2452                        outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */
2453                        host->active = NULL;
2454                        host->active_tc = NULL;
2455                        host->flags &= ~HCF_EXPECT_DISC;
2456                        outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
2457                        outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */
2458                        return -1;
2459                }
2460                return int_initio_busfree(host);
2461        }
2462        /* The old code really does the below. Can probably be removed */
2463        if (host->jsint & (TSS_FUNC_COMP | TSS_BUS_SERV))
2464                return host->phase;
2465        return host->phase;
2466}
2467
2468static int initio_wait_disc(struct initio_host * host)
2469{
2470        while (!((host->jsstatus0 = inb(host->addr + TUL_SStatus0)) & TSS_INT_PENDING))
2471                cpu_relax();
2472
2473        host->jsint = inb(host->addr + TUL_SInt);
2474
2475        if (host->jsint & TSS_SCSIRST_INT)      /* if SCSI bus reset detected */
2476                return int_initio_scsi_rst(host);
2477        if (host->jsint & TSS_DISC_INT) {       /* BUS disconnection */
2478                outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */
2479                outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
2480                outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */
2481                host->active = NULL;
2482                return -1;
2483        }
2484        return initio_bad_seq(host);
2485}
2486
2487static int initio_wait_done_disc(struct initio_host * host)
2488{
2489        while (!((host->jsstatus0 = inb(host->addr + TUL_SStatus0))
2490                 & TSS_INT_PENDING))
2491                 cpu_relax();
2492
2493        host->jsint = inb(host->addr + TUL_SInt);
2494
2495        if (host->jsint & TSS_SCSIRST_INT)      /* if SCSI bus reset detected */
2496                return int_initio_scsi_rst(host);
2497        if (host->jsint & TSS_DISC_INT) {       /* BUS disconnection */
2498                outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);          /* Flush SCSI FIFO */
2499                outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
2500                outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1);         /* Enable HW reselect */
2501                initio_unlink_busy_scb(host, host->active);
2502
2503                initio_append_done_scb(host, host->active);
2504                host->active = NULL;
2505                return -1;
2506        }
2507        return initio_bad_seq(host);
2508}
2509
2510/**
2511 *      i91u_intr               -       IRQ handler
2512 *      @irqno: IRQ number
2513 *      @dev_id: IRQ identifier
2514 *
2515 *      Take the relevant locks and then invoke the actual isr processing
2516 *      code under the lock.
2517 */
2518
2519static irqreturn_t i91u_intr(int irqno, void *dev_id)
2520{
2521        struct Scsi_Host *dev = dev_id;
2522        unsigned long flags;
2523        int r;
2524        
2525        spin_lock_irqsave(dev->host_lock, flags);
2526        r = initio_isr((struct initio_host *)dev->hostdata);
2527        spin_unlock_irqrestore(dev->host_lock, flags);
2528        if (r)
2529                return IRQ_HANDLED;
2530        else
2531                return IRQ_NONE;
2532}
2533
2534
2535/**
2536 *      initio_build_scb                -       Build the mappings and SCB
2537 *      @host: InitIO host taking the command
2538 *      @cblk: Firmware command block
2539 *      @cmnd: SCSI midlayer command block
2540 *
2541 *      Translate the abstract SCSI command into a firmware command block
2542 *      suitable for feeding to the InitIO host controller. This also requires
2543 *      we build the scatter gather lists and ensure they are mapped properly.
2544 */
2545
2546static void initio_build_scb(struct initio_host * host, struct scsi_ctrl_blk * cblk, struct scsi_cmnd * cmnd)
2547{                               /* Create corresponding SCB     */
2548        struct scatterlist *sglist;
2549        struct sg_entry *sg;            /* Pointer to SG list           */
2550        int i, nseg;
2551        long total_len;
2552        dma_addr_t dma_addr;
2553
2554        /* Fill in the command headers */
2555        cblk->post = i91uSCBPost;       /* i91u's callback routine      */
2556        cblk->srb = cmnd;
2557        cblk->opcode = ExecSCSI;
2558        cblk->flags = SCF_POST; /* After SCSI done, call post routine */
2559        cblk->target = cmnd->device->id;
2560        cblk->lun = cmnd->device->lun;
2561        cblk->ident = cmnd->device->lun | DISC_ALLOW;
2562
2563        cblk->flags |= SCF_SENSE;       /* Turn on auto request sense   */
2564
2565        /* Map the sense buffer into bus memory */
2566        dma_addr = dma_map_single(&host->pci_dev->dev, cmnd->sense_buffer,
2567                                  SENSE_SIZE, DMA_FROM_DEVICE);
2568        cblk->senseptr = (u32)dma_addr;
2569        cblk->senselen = SENSE_SIZE;
2570        cmnd->SCp.ptr = (char *)(unsigned long)dma_addr;
2571        cblk->cdblen = cmnd->cmd_len;
2572
2573        /* Clear the returned status */
2574        cblk->hastat = 0;
2575        cblk->tastat = 0;
2576        /* Command the command */
2577        memcpy(cblk->cdb, cmnd->cmnd, cmnd->cmd_len);
2578
2579        /* Set up tags */
2580        if (cmnd->device->tagged_supported) {   /* Tag Support                  */
2581                cblk->tagmsg = SIMPLE_QUEUE_TAG;        /* Do simple tag only   */
2582        } else {
2583                cblk->tagmsg = 0;       /* No tag support               */
2584        }
2585
2586        /* todo handle map_sg error */
2587        nseg = scsi_dma_map(cmnd);
2588        BUG_ON(nseg < 0);
2589        if (nseg) {
2590                dma_addr = dma_map_single(&host->pci_dev->dev, &cblk->sglist[0],
2591                                          sizeof(struct sg_entry) * TOTAL_SG_ENTRY,
2592                                          DMA_BIDIRECTIONAL);
2593                cblk->bufptr = (u32)dma_addr;
2594                cmnd->SCp.dma_handle = dma_addr;
2595
2596                cblk->sglen = nseg;
2597
2598                cblk->flags |= SCF_SG;  /* Turn on SG list flag       */
2599                total_len = 0;
2600                sg = &cblk->sglist[0];
2601                scsi_for_each_sg(cmnd, sglist, cblk->sglen, i) {
2602                        sg->data = cpu_to_le32((u32)sg_dma_address(sglist));
2603                        sg->len = cpu_to_le32((u32)sg_dma_len(sglist));
2604                        total_len += sg_dma_len(sglist);
2605                        ++sg;
2606                }
2607
2608                cblk->buflen = (scsi_bufflen(cmnd) > total_len) ?
2609                        total_len : scsi_bufflen(cmnd);
2610        } else {        /* No data transfer required */
2611                cblk->buflen = 0;
2612                cblk->sglen = 0;
2613        }
2614}
2615
2616/**
2617 *      i91u_queuecommand       -       Queue a new command if possible
2618 *      @cmd: SCSI command block from the mid layer
2619 *      @done: Completion handler
2620 *
2621 *      Attempts to queue a new command with the host adapter. Will return
2622 *      zero if successful or indicate a host busy condition if not (which
2623 *      will cause the mid layer to call us again later with the command)
2624 */
2625
2626static int i91u_queuecommand_lck(struct scsi_cmnd *cmd,
2627                void (*done)(struct scsi_cmnd *))
2628{
2629        struct initio_host *host = (struct initio_host *) cmd->device->host->hostdata;
2630        struct scsi_ctrl_blk *cmnd;
2631
2632        cmd->scsi_done = done;
2633
2634        cmnd = initio_alloc_scb(host);
2635        if (!cmnd)
2636                return SCSI_MLQUEUE_HOST_BUSY;
2637
2638        initio_build_scb(host, cmnd, cmd);
2639        initio_exec_scb(host, cmnd);
2640        return 0;
2641}
2642
2643static DEF_SCSI_QCMD(i91u_queuecommand)
2644
2645/**
2646 *      i91u_bus_reset          -       reset the SCSI bus
2647 *      @cmnd: Command block we want to trigger the reset for
2648 *
2649 *      Initiate a SCSI bus reset sequence
2650 */
2651
2652static int i91u_bus_reset(struct scsi_cmnd * cmnd)
2653{
2654        struct initio_host *host;
2655
2656        host = (struct initio_host *) cmnd->device->host->hostdata;
2657
2658        spin_lock_irq(cmnd->device->host->host_lock);
2659        initio_reset_scsi(host, 0);
2660        spin_unlock_irq(cmnd->device->host->host_lock);
2661
2662        return SUCCESS;
2663}
2664
2665/**
2666 *      i91u_biospararm                 -       return the "logical geometry
2667 *      @sdev: SCSI device
2668 *      @dev; Matching block device
2669 *      @capacity: Sector size of drive
2670 *      @info_array: Return space for BIOS geometry
2671 *
2672 *      Map the device geometry in a manner compatible with the host
2673 *      controller BIOS behaviour.
2674 *
2675 *      FIXME: limited to 2^32 sector devices.
2676 */
2677
2678static int i91u_biosparam(struct scsi_device *sdev, struct block_device *dev,
2679                sector_t capacity, int *info_array)
2680{
2681        struct initio_host *host;               /* Point to Host adapter control block */
2682        struct target_control *tc;
2683
2684        host = (struct initio_host *) sdev->host->hostdata;
2685        tc = &host->targets[sdev->id];
2686
2687        if (tc->heads) {
2688                info_array[0] = tc->heads;
2689                info_array[1] = tc->sectors;
2690                info_array[2] = (unsigned long)capacity / tc->heads / tc->sectors;
2691        } else {
2692                if (tc->drv_flags & TCF_DRV_255_63) {
2693                        info_array[0] = 255;
2694                        info_array[1] = 63;
2695                        info_array[2] = (unsigned long)capacity / 255 / 63;
2696                } else {
2697                        info_array[0] = 64;
2698                        info_array[1] = 32;
2699                        info_array[2] = (unsigned long)capacity >> 11;
2700                }
2701        }
2702
2703#if defined(DEBUG_BIOSPARAM)
2704        if (i91u_debug & debug_biosparam) {
2705                printk("bios geometry: head=%d, sec=%d, cyl=%d\n",
2706                       info_array[0], info_array[1], info_array[2]);
2707                printk("WARNING: check, if the bios geometry is correct.\n");
2708        }
2709#endif
2710
2711        return 0;
2712}
2713
2714/**
2715 *      i91u_unmap_scb          -       Unmap a command
2716 *      @pci_dev: PCI device the command is for
2717 *      @cmnd: The command itself
2718 *
2719 *      Unmap any PCI mapping/IOMMU resources allocated when the command
2720 *      was mapped originally as part of initio_build_scb
2721 */
2722
2723static void i91u_unmap_scb(struct pci_dev *pci_dev, struct scsi_cmnd *cmnd)
2724{
2725        /* auto sense buffer */
2726        if (cmnd->SCp.ptr) {
2727                dma_unmap_single(&pci_dev->dev,
2728                                 (dma_addr_t)((unsigned long)cmnd->SCp.ptr),
2729                                 SENSE_SIZE, DMA_FROM_DEVICE);
2730                cmnd->SCp.ptr = NULL;
2731        }
2732
2733        /* request buffer */
2734        if (scsi_sg_count(cmnd)) {
2735                dma_unmap_single(&pci_dev->dev, cmnd->SCp.dma_handle,
2736                                 sizeof(struct sg_entry) * TOTAL_SG_ENTRY,
2737                                 DMA_BIDIRECTIONAL);
2738
2739                scsi_dma_unmap(cmnd);
2740        }
2741}
2742
2743/**
2744 *      i91uSCBPost             -       SCSI callback
2745 *      @host: Pointer to host adapter control block.
2746 *      @cmnd: Pointer to SCSI control block.
2747 *
2748 *      This is callback routine be called when tulip finish one
2749 *      SCSI command.
2750 */
2751
2752static void i91uSCBPost(u8 * host_mem, u8 * cblk_mem)
2753{
2754        struct scsi_cmnd *cmnd; /* Pointer to SCSI request block */
2755        struct initio_host *host;
2756        struct scsi_ctrl_blk *cblk;
2757
2758        host = (struct initio_host *) host_mem;
2759        cblk = (struct scsi_ctrl_blk *) cblk_mem;
2760        if ((cmnd = cblk->srb) == NULL) {
2761                printk(KERN_ERR "i91uSCBPost: SRB pointer is empty\n");
2762                WARN_ON(1);
2763                initio_release_scb(host, cblk); /* Release SCB for current channel */
2764                return;
2765        }
2766
2767        /*
2768         *      Remap the firmware error status into a mid layer one
2769         */
2770        switch (cblk->hastat) {
2771        case 0x0:
2772        case 0xa:               /* Linked command complete without error and linked normally */
2773        case 0xb:               /* Linked command complete without error interrupt generated */
2774                cblk->hastat = 0;
2775                break;
2776
2777        case 0x11:              /* Selection time out-The initiator selection or target
2778                                   reselection was not complete within the SCSI Time out period */
2779                cblk->hastat = DID_TIME_OUT;
2780                break;
2781
2782        case 0x14:              /* Target bus phase sequence failure-An invalid bus phase or bus
2783                                   phase sequence was requested by the target. The host adapter
2784                                   will generate a SCSI Reset Condition, notifying the host with
2785                                   a SCRD interrupt */
2786                cblk->hastat = DID_RESET;
2787                break;
2788
2789        case 0x1a:              /* SCB Aborted. 07/21/98 */
2790                cblk->hastat = DID_ABORT;
2791                break;
2792
2793        case 0x12:              /* Data overrun/underrun-The target attempted to transfer more data
2794                                   than was allocated by the Data Length field or the sum of the
2795                                   Scatter / Gather Data Length fields. */
2796        case 0x13:              /* Unexpected bus free-The target dropped the SCSI BSY at an unexpected time. */
2797        case 0x16:              /* Invalid SCB Operation Code. */
2798
2799        default:
2800                printk("ini9100u: %x %x\n", cblk->hastat, cblk->tastat);
2801                cblk->hastat = DID_ERROR;       /* Couldn't find any better */
2802                break;
2803        }
2804
2805        cmnd->result = cblk->tastat | (cblk->hastat << 16);
2806        i91u_unmap_scb(host->pci_dev, cmnd);
2807        cmnd->scsi_done(cmnd);  /* Notify system DONE           */
2808        initio_release_scb(host, cblk); /* Release SCB for current channel */
2809}
2810
2811static struct scsi_host_template initio_template = {
2812        .proc_name              = "INI9100U",
2813        .name                   = "Initio INI-9X00U/UW SCSI device driver",
2814        .queuecommand           = i91u_queuecommand,
2815        .eh_bus_reset_handler   = i91u_bus_reset,
2816        .bios_param             = i91u_biosparam,
2817        .can_queue              = MAX_TARGETS * i91u_MAXQUEUE,
2818        .this_id                = 1,
2819        .sg_tablesize           = SG_ALL,
2820        .use_clustering         = ENABLE_CLUSTERING,
2821};
2822
2823static int initio_probe_one(struct pci_dev *pdev,
2824        const struct pci_device_id *id)
2825{
2826        struct Scsi_Host *shost;
2827        struct initio_host *host;
2828        u32 reg;
2829        u16 bios_seg;
2830        struct scsi_ctrl_blk *scb, *tmp, *prev = NULL /* silence gcc */;
2831        int num_scb, i, error;
2832
2833        error = pci_enable_device(pdev);
2834        if (error)
2835                return error;
2836
2837        pci_read_config_dword(pdev, 0x44, (u32 *) & reg);
2838        bios_seg = (u16) (reg & 0xFF);
2839        if (((reg & 0xFF00) >> 8) == 0xFF)
2840                reg = 0;
2841        bios_seg = (bios_seg << 8) + ((u16) ((reg & 0xFF00) >> 8));
2842
2843        if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) {
2844                printk(KERN_WARNING  "i91u: Could not set 32 bit DMA mask\n");
2845                error = -ENODEV;
2846                goto out_disable_device;
2847        }
2848        shost = scsi_host_alloc(&initio_template, sizeof(struct initio_host));
2849        if (!shost) {
2850                printk(KERN_WARNING "initio: Could not allocate host structure.\n");
2851                error = -ENOMEM;
2852                goto out_disable_device;
2853        }
2854        host = (struct initio_host *)shost->hostdata;
2855        memset(host, 0, sizeof(struct initio_host));
2856        host->addr = pci_resource_start(pdev, 0);
2857        host->bios_addr = bios_seg;
2858
2859        if (!request_region(host->addr, 256, "i91u")) {
2860                printk(KERN_WARNING "initio: I/O port range 0x%x is busy.\n", host->addr);
2861                error = -ENODEV;
2862                goto out_host_put;
2863        }
2864
2865        if (initio_tag_enable)  /* 1.01i */
2866                num_scb = MAX_TARGETS * i91u_MAXQUEUE;
2867        else
2868                num_scb = MAX_TARGETS + 3;      /* 1-tape, 1-CD_ROM, 1- extra */
2869
2870        for (; num_scb >= MAX_TARGETS + 3; num_scb--) {
2871                i = num_scb * sizeof(struct scsi_ctrl_blk);
2872                if ((scb = kzalloc(i, GFP_DMA)) != NULL)
2873                        break;
2874        }
2875
2876        if (!scb) {
2877                printk(KERN_WARNING "initio: Cannot allocate SCB array.\n");
2878                error = -ENOMEM;
2879                goto out_release_region;
2880        }
2881
2882        host->pci_dev = pdev;
2883
2884        host->semaph = 1;
2885        spin_lock_init(&host->semaph_lock);
2886        host->num_scbs = num_scb;
2887        host->scb = scb;
2888        host->next_pending = scb;
2889        host->next_avail = scb;
2890        for (i = 0, tmp = scb; i < num_scb; i++, tmp++) {
2891                tmp->tagid = i;
2892                if (i != 0)
2893                        prev->next = tmp;
2894                prev = tmp;
2895        }
2896        prev->next = NULL;
2897        host->scb_end = tmp;
2898        host->first_avail = scb;
2899        host->last_avail = prev;
2900        spin_lock_init(&host->avail_lock);
2901
2902        initio_init(host, phys_to_virt(((u32)bios_seg << 4)));
2903
2904        host->jsstatus0 = 0;
2905
2906        shost->io_port = host->addr;
2907        shost->n_io_port = 0xff;
2908        shost->can_queue = num_scb;             /* 03/05/98                      */
2909        shost->unique_id = host->addr;
2910        shost->max_id = host->max_tar;
2911        shost->max_lun = 32;    /* 10/21/97                     */
2912        shost->irq = pdev->irq;
2913        shost->this_id = host->scsi_id; /* Assign HCS index           */
2914        shost->base = host->addr;
2915        shost->sg_tablesize = TOTAL_SG_ENTRY;
2916
2917        error = request_irq(pdev->irq, i91u_intr, IRQF_SHARED, "i91u", shost);
2918        if (error < 0) {
2919                printk(KERN_WARNING "initio: Unable to request IRQ %d\n", pdev->irq);
2920                goto out_free_scbs;
2921        }
2922
2923        pci_set_drvdata(pdev, shost);
2924
2925        error = scsi_add_host(shost, &pdev->dev);
2926        if (error)
2927                goto out_free_irq;
2928        scsi_scan_host(shost);
2929        return 0;
2930out_free_irq:
2931        free_irq(pdev->irq, shost);
2932out_free_scbs:
2933        kfree(host->scb);
2934out_release_region:
2935        release_region(host->addr, 256);
2936out_host_put:
2937        scsi_host_put(shost);
2938out_disable_device:
2939        pci_disable_device(pdev);
2940        return error;
2941}
2942
2943/**
2944 *      initio_remove_one       -       control shutdown
2945 *      @pdev:  PCI device being released
2946 *
2947 *      Release the resources assigned to this adapter after it has
2948 *      finished being used.
2949 */
2950
2951static void initio_remove_one(struct pci_dev *pdev)
2952{
2953        struct Scsi_Host *host = pci_get_drvdata(pdev);
2954        struct initio_host *s = (struct initio_host *)host->hostdata;
2955        scsi_remove_host(host);
2956        free_irq(pdev->irq, host);
2957        release_region(s->addr, 256);
2958        scsi_host_put(host);
2959        pci_disable_device(pdev);
2960}
2961
2962MODULE_LICENSE("GPL");
2963
2964static struct pci_device_id initio_pci_tbl[] = {
2965        {PCI_VENDOR_ID_INIT, 0x9500, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2966        {PCI_VENDOR_ID_INIT, 0x9400, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2967        {PCI_VENDOR_ID_INIT, 0x9401, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2968        {PCI_VENDOR_ID_INIT, 0x0002, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2969        {PCI_VENDOR_ID_DOMEX, 0x0002, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2970        {0,}
2971};
2972MODULE_DEVICE_TABLE(pci, initio_pci_tbl);
2973
2974static struct pci_driver initio_pci_driver = {
2975        .name           = "initio",
2976        .id_table       = initio_pci_tbl,
2977        .probe          = initio_probe_one,
2978        .remove         = initio_remove_one,
2979};
2980
2981static int __init initio_init_driver(void)
2982{
2983        return pci_register_driver(&initio_pci_driver);
2984}
2985
2986static void __exit initio_exit_driver(void)
2987{
2988        pci_unregister_driver(&initio_pci_driver);
2989}
2990
2991MODULE_DESCRIPTION("Initio INI-9X00U/UW SCSI device driver");
2992MODULE_AUTHOR("Initio Corporation");
2993MODULE_LICENSE("GPL");
2994
2995module_init(initio_init_driver);
2996module_exit(initio_exit_driver);
2997