drivers/scsi/fdomain.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Driver for Future Domain TMC-16x0 and TMC-3260 SCSI host adapters
   4  * Copyright 2019 Ondrej Zary
   5  *
   6  * Original driver by
   7  * Rickard E. Faith, faith@cs.unc.edu
   8  *
   9  * Future Domain BIOS versions supported for autodetect:
  10  *    2.0, 3.0, 3.2, 3.4 (1.0), 3.5 (2.0), 3.6, 3.61
  11  * Chips supported:
  12  *    TMC-1800, TMC-18C50, TMC-18C30, TMC-36C70
  13  * Boards supported:
  14  *    Future Domain TMC-1650, TMC-1660, TMC-1670, TMC-1680, TMC-1610M/MER/MEX
  15  *    Future Domain TMC-3260 (PCI)
  16  *    Quantum ISA-200S, ISA-250MG
  17  *    Adaptec AHA-2920A (PCI) [BUT *NOT* AHA-2920C -- use aic7xxx instead]
  18  *    IBM ?
  19  *
  20  * NOTE:
  21  *
  22  * The Adaptec AHA-2920C has an Adaptec AIC-7850 chip on it.
  23  * Use the aic7xxx driver for this board.
  24  *
  25  * The Adaptec AHA-2920A has a Future Domain chip on it, so this is the right
  26  * driver for that card.  Unfortunately, the boxes will probably just say
  27  * "2920", so you'll have to look on the card for a Future Domain logo, or a
  28  * letter after the 2920.
  29  *
  30  * If you have a TMC-8xx or TMC-9xx board, then this is not the driver for
  31  * your board.
  32  *
  33  * DESCRIPTION:
  34  *
  35  * This is the Linux low-level SCSI driver for Future Domain TMC-1660/1680
  36  * TMC-1650/1670, and TMC-3260 SCSI host adapters.  The 1650 and 1670 have a
  37  * 25-pin external connector, whereas the 1660 and 1680 have a SCSI-2 50-pin
  38  * high-density external connector.  The 1670 and 1680 have floppy disk
  39  * controllers built in.  The TMC-3260 is a PCI bus card.
  40  *
  41  * Future Domain's older boards are based on the TMC-1800 chip, and this
  42  * driver was originally written for a TMC-1680 board with the TMC-1800 chip.
  43  * More recently, boards are being produced with the TMC-18C50 and TMC-18C30
  44  * chips.
  45  *
  46  * Please note that the drive ordering that Future Domain implemented in BIOS
  47  * versions 3.4 and 3.5 is the opposite of the order (currently) used by the
  48  * rest of the SCSI industry.
  49  *
  50  *
  51  * REFERENCES USED:
  52  *
  53  * "TMC-1800 SCSI Chip Specification (FDC-1800T)", Future Domain Corporation,
  54  * 1990.
  55  *
  56  * "Technical Reference Manual: 18C50 SCSI Host Adapter Chip", Future Domain
  57  * Corporation, January 1992.
  58  *
  59  * "LXT SCSI Products: Specifications and OEM Technical Manual (Revision
  60  * B/September 1991)", Maxtor Corporation, 1991.
  61  *
  62  * "7213S product Manual (Revision P3)", Maxtor Corporation, 1992.
  63  *
  64  * "Draft Proposed American National Standard: Small Computer System
  65  * Interface - 2 (SCSI-2)", Global Engineering Documents. (X3T9.2/86-109,
  66  * revision 10h, October 17, 1991)
  67  *
  68  * Private communications, Drew Eckhardt (drew@cs.colorado.edu) and Eric
  69  * Youngdale (ericy@cais.com), 1992.
  70  *
  71  * Private communication, Tuong Le (Future Domain Engineering department),
  72  * 1994. (Disk geometry computations for Future Domain BIOS version 3.4, and
  73  * TMC-18C30 detection.)
  74  *
  75  * Hogan, Thom. The Programmer's PC Sourcebook. Microsoft Press, 1988. Page
  76  * 60 (2.39: Disk Partition Table Layout).
  77  *
  78  * "18C30 Technical Reference Manual", Future Domain Corporation, 1993, page
  79  * 6-1.
  80  */
  81
  82 #include <linux/module.h>
  83 #include <linux/interrupt.h>
  84 #include <linux/delay.h>
  85 #include <linux/pci.h>
  86 #include <linux/workqueue.h>
  87 #include <scsi/scsicam.h>
  88 #include <scsi/scsi_cmnd.h>
  89 #include <scsi/scsi_device.h>
  90 #include <scsi/scsi_host.h>
  91 #include "fdomain.h"
  92
  93 /*
  94  * FIFO_COUNT: The host adapter has an 8K cache (host adapters based on the
  95  * 18C30 chip have a 2k cache).  When this many 512 byte blocks are filled by
  96  * the SCSI device, an interrupt will be raised.  Therefore, this could be as
  97  * low as 0, or as high as 16.  Note, however, that values which are too high
  98  * or too low seem to prevent any interrupts from occurring, and thereby lock
  99  * up the machine.
 100  */
 101 #define FIFO_COUNT      2       /* Number of 512 byte blocks before INTR */
 102 #define PARITY_MASK     ACTL_PAREN      /* Parity enabled, 0 = disabled */
 103
 104 enum chip_type {
 105         unknown         = 0x00,
 106         tmc1800         = 0x01,
 107         tmc18c50        = 0x02,
 108         tmc18c30        = 0x03,
 109 };
 110
 111 struct fdomain {
 112         int base;
 113         struct scsi_cmnd *cur_cmd;
 114         enum chip_type chip;
 115         struct work_struct work;
 116 };
 117
 118 static struct scsi_pointer *fdomain_scsi_pointer(struct scsi_cmnd *cmd)
 119 {
 120         return scsi_cmd_priv(cmd);
 121 }
 122
 123 static inline void fdomain_make_bus_idle(struct fdomain *fd)
 124 {
 125         outb(0, fd->base + REG_BCTL);
 126         outb(0, fd->base + REG_MCTL);
 127         if (fd->chip == tmc18c50 || fd->chip == tmc18c30)
 128                 /* Clear forced intr. */
 129                 outb(ACTL_RESET | ACTL_CLRFIRQ | PARITY_MASK,
 130                      fd->base + REG_ACTL);
 131         else
 132                 outb(ACTL_RESET | PARITY_MASK, fd->base + REG_ACTL);
 133 }
 134
 135 static enum chip_type fdomain_identify(int port)
 136 {
 137         u16 id = inb(port + REG_ID_LSB) | inb(port + REG_ID_MSB) << 8;
 138
 139         switch (id) {
 140         case 0x6127:
 141                 return tmc1800;
 142         case 0x60e9: /* 18c50 or 18c30 */
 143                 break;
 144         default:
 145                 return unknown;
 146         }
 147
 148         /* Try to toggle 32-bit mode. This only works on an 18c30 chip. */
 149         outb(CFG2_32BIT, port + REG_CFG2);
 150         if ((inb(port + REG_CFG2) & CFG2_32BIT)) {
 151                 outb(0, port + REG_CFG2);
 152                 if ((inb(port + REG_CFG2) & CFG2_32BIT) == 0)
 153                         return tmc18c30;
 154         }
 155         /* If that failed, we are an 18c50. */
 156         return tmc18c50;
 157 }
 158
 159 static int fdomain_test_loopback(int base)
 160 {
 161         int i;
 162
 163         for (i = 0; i < 255; i++) {
 164                 outb(i, base + REG_LOOPBACK);
 165                 if (inb(base + REG_LOOPBACK) != i)
 166                         return 1;
 167         }
 168
 169         return 0;
 170 }
 171
 172 static void fdomain_reset(int base)
 173 {
 174         outb(BCTL_RST, base + REG_BCTL);
 175         mdelay(20);
 176         outb(0, base + REG_BCTL);
 177         mdelay(1150);
 178         outb(0, base + REG_MCTL);
 179         outb(PARITY_MASK, base + REG_ACTL);
 180 }
 181
 182 static int fdomain_select(struct Scsi_Host *sh, int target)
 183 {
 184         int status;
 185         unsigned long timeout;
 186         struct fdomain *fd = shost_priv(sh);
 187
 188         outb(BCTL_BUSEN | BCTL_SEL, fd->base + REG_BCTL);
 189         outb(BIT(sh->this_id) | BIT(target), fd->base + REG_SCSI_DATA_NOACK);
 190
 191         /* Stop arbitration and enable parity */
 192         outb(PARITY_MASK, fd->base + REG_ACTL);
 193
 194         timeout = 350;  /* 350 msec */
 195
 196         do {
 197                 status = inb(fd->base + REG_BSTAT);
 198                 if (status & BSTAT_BSY) {
 199                         /* Enable SCSI Bus */
 200                         /* (on error, should make bus idle with 0) */
 201                         outb(BCTL_BUSEN, fd->base + REG_BCTL);
 202                         return 0;
 203                 }
 204                 mdelay(1);
 205         } while (--timeout);
 206         fdomain_make_bus_idle(fd);
 207         return 1;
 208 }
 209
 210 static void fdomain_finish_cmd(struct fdomain *fd)
 211 {
 212         outb(0, fd->base + REG_ICTL);
 213         fdomain_make_bus_idle(fd);
 214         scsi_done(fd->cur_cmd);
 215         fd->cur_cmd = NULL;
 216 }
 217
 218 static void fdomain_read_data(struct scsi_cmnd *cmd)
 219 {
 220         struct fdomain *fd = shost_priv(cmd->device->host);
 221         unsigned char *virt, *ptr;
 222         size_t offset, len;
 223
 224         while ((len = inw(fd->base + REG_FIFO_COUNT)) > 0) {
 225                 offset = scsi_bufflen(cmd) - scsi_get_resid(cmd);
 226                 virt = scsi_kmap_atomic_sg(scsi_sglist(cmd), scsi_sg_count(cmd),
 227                                            &offset, &len);
 228                 ptr = virt + offset;
 229                 if (len & 1)
 230                         *ptr++ = inb(fd->base + REG_FIFO);
 231                 if (len > 1)
 232                         insw(fd->base + REG_FIFO, ptr, len >> 1);
 233                 scsi_set_resid(cmd, scsi_get_resid(cmd) - len);
 234                 scsi_kunmap_atomic_sg(virt);
 235         }
 236 }
 237
 238 static void fdomain_write_data(struct scsi_cmnd *cmd)
 239 {
 240         struct fdomain *fd = shost_priv(cmd->device->host);
 241         /* 8k FIFO for pre-tmc18c30 chips, 2k FIFO for tmc18c30 */
 242         int FIFO_Size = fd->chip == tmc18c30 ? 0x800 : 0x2000;
 243         unsigned char *virt, *ptr;
 244         size_t offset, len;
 245
 246         while ((len = FIFO_Size - inw(fd->base + REG_FIFO_COUNT)) > 512) {
 247                 offset = scsi_bufflen(cmd) - scsi_get_resid(cmd);
 248                 if (len + offset > scsi_bufflen(cmd)) {
 249                         len = scsi_bufflen(cmd) - offset;
 250                         if (len == 0)
 251                                 break;
 252                 }
 253                 virt = scsi_kmap_atomic_sg(scsi_sglist(cmd), scsi_sg_count(cmd),
 254                                            &offset, &len);
 255                 ptr = virt + offset;
 256                 if (len & 1)
 257                         outb(*ptr++, fd->base + REG_FIFO);
 258                 if (len > 1)
 259                         outsw(fd->base + REG_FIFO, ptr, len >> 1);
 260                 scsi_set_resid(cmd, scsi_get_resid(cmd) - len);
 261                 scsi_kunmap_atomic_sg(virt);
 262         }
 263 }
 264
 265 static void fdomain_work(struct work_struct *work)
 266 {
 267         struct fdomain *fd = container_of(work, struct fdomain, work);
 268         struct Scsi_Host *sh = container_of((void *)fd, struct Scsi_Host,
 269                                             hostdata);
 270         struct scsi_cmnd *cmd = fd->cur_cmd;
 271         struct scsi_pointer *scsi_pointer = fdomain_scsi_pointer(cmd);
 272         unsigned long flags;
 273         int status;
 274         int done = 0;
 275
 276         spin_lock_irqsave(sh->host_lock, flags);
 277
 278         if (scsi_pointer->phase & in_arbitration) {
 279                 status = inb(fd->base + REG_ASTAT);
 280                 if (!(status & ASTAT_ARB)) {
 281                         set_host_byte(cmd, DID_BUS_BUSY);
 282                         fdomain_finish_cmd(fd);
 283                         goto out;
 284                 }
 285                 scsi_pointer->phase = in_selection;
 286
 287                 outb(ICTL_SEL | FIFO_COUNT, fd->base + REG_ICTL);
 288                 outb(BCTL_BUSEN | BCTL_SEL, fd->base + REG_BCTL);
 289                 outb(BIT(cmd->device->host->this_id) | BIT(scmd_id(cmd)),
 290                      fd->base + REG_SCSI_DATA_NOACK);
 291                 /* Stop arbitration and enable parity */
 292                 outb(ACTL_IRQEN | PARITY_MASK, fd->base + REG_ACTL);
 293                 goto out;
 294         } else if (scsi_pointer->phase & in_selection) {
 295                 status = inb(fd->base + REG_BSTAT);
 296                 if (!(status & BSTAT_BSY)) {
 297                         /* Try again, for slow devices */
 298                         if (fdomain_select(cmd->device->host, scmd_id(cmd))) {
 299                                 set_host_byte(cmd, DID_NO_CONNECT);
 300                                 fdomain_finish_cmd(fd);
 301                                 goto out;
 302                         }
 303                         /* Stop arbitration and enable parity */
 304                         outb(ACTL_IRQEN | PARITY_MASK, fd->base + REG_ACTL);
 305                 }
 306                 scsi_pointer->phase = in_other;
 307                 outb(ICTL_FIFO | ICTL_REQ | FIFO_COUNT, fd->base + REG_ICTL);
 308                 outb(BCTL_BUSEN, fd->base + REG_BCTL);
 309                 goto out;
 310         }
 311
 312         /* fdomain_scsi_pointer(cur_cmd)->phase == in_other: this is the body of the routine */
 313         status = inb(fd->base + REG_BSTAT);
 314
 315         if (status & BSTAT_REQ) {
 316                 switch (status & (BSTAT_MSG | BSTAT_CMD | BSTAT_IO)) {
 317                 case BSTAT_CMD: /* COMMAND OUT */
 318                         outb(cmd->cmnd[scsi_pointer->sent_command++],
 319                              fd->base + REG_SCSI_DATA);
 320                         break;
 321                 case 0: /* DATA OUT -- tmc18c50/tmc18c30 only */
 322                         if (fd->chip != tmc1800 && !scsi_pointer->have_data_in) {
 323                                 scsi_pointer->have_data_in = -1;
 324                                 outb(ACTL_IRQEN | ACTL_FIFOWR | ACTL_FIFOEN |
 325                                      PARITY_MASK, fd->base + REG_ACTL);
 326                         }
 327                         break;
 328                 case BSTAT_IO:  /* DATA IN -- tmc18c50/tmc18c30 only */
 329                         if (fd->chip != tmc1800 && !scsi_pointer->have_data_in) {
 330                                 scsi_pointer->have_data_in = 1;
 331                                 outb(ACTL_IRQEN | ACTL_FIFOEN | PARITY_MASK,
 332                                      fd->base + REG_ACTL);
 333                         }
 334                         break;
 335                 case BSTAT_CMD | BSTAT_IO:      /* STATUS IN */
 336                         scsi_pointer->Status = inb(fd->base + REG_SCSI_DATA);
 337                         break;
 338                 case BSTAT_MSG | BSTAT_CMD:     /* MESSAGE OUT */
 339                         outb(MESSAGE_REJECT, fd->base + REG_SCSI_DATA);
 340                         break;
 341                 case BSTAT_MSG | BSTAT_CMD | BSTAT_IO:  /* MESSAGE IN */
 342                         scsi_pointer->Message = inb(fd->base + REG_SCSI_DATA);
 343                         if (scsi_pointer->Message == COMMAND_COMPLETE)
 344                                 ++done;
 345                         break;
 346                 }
 347         }
 348
 349         if (fd->chip == tmc1800 && !scsi_pointer->have_data_in &&
 350             scsi_pointer->sent_command >= cmd->cmd_len) {
 351                 if (cmd->sc_data_direction == DMA_TO_DEVICE) {
 352                         scsi_pointer->have_data_in = -1;
 353                         outb(ACTL_IRQEN | ACTL_FIFOWR | ACTL_FIFOEN |
 354                              PARITY_MASK, fd->base + REG_ACTL);
 355                 } else {
 356                         scsi_pointer->have_data_in = 1;
 357                         outb(ACTL_IRQEN | ACTL_FIFOEN | PARITY_MASK,
 358                              fd->base + REG_ACTL);
 359                 }
 360         }
 361
 362         if (scsi_pointer->have_data_in == -1) /* DATA OUT */
 363                 fdomain_write_data(cmd);
 364
 365         if (scsi_pointer->have_data_in == 1) /* DATA IN */
 366                 fdomain_read_data(cmd);
 367
 368         if (done) {
 369                 set_status_byte(cmd, scsi_pointer->Status);
 370                 set_host_byte(cmd, DID_OK);
 371                 scsi_msg_to_host_byte(cmd, scsi_pointer->Message);
 372                 fdomain_finish_cmd(fd);
 373         } else {
 374                 if (scsi_pointer->phase & disconnect) {
 375                         outb(ICTL_FIFO | ICTL_SEL | ICTL_REQ | FIFO_COUNT,
 376                              fd->base + REG_ICTL);
 377                         outb(0, fd->base + REG_BCTL);
 378                 } else
 379                         outb(ICTL_FIFO | ICTL_REQ | FIFO_COUNT,
 380                              fd->base + REG_ICTL);
 381         }
 382 out:
 383         spin_unlock_irqrestore(sh->host_lock, flags);
 384 }
 385
 386 static irqreturn_t fdomain_irq(int irq, void *dev_id)
 387 {
 388         struct fdomain *fd = dev_id;
 389
 390         /* Is it our IRQ? */
 391         if ((inb(fd->base + REG_ASTAT) & ASTAT_IRQ) == 0)
 392                 return IRQ_NONE;
 393
 394         outb(0, fd->base + REG_ICTL);
 395
 396         /* We usually have one spurious interrupt after each command. */
 397         if (!fd->cur_cmd)       /* Spurious interrupt */
 398                 return IRQ_NONE;
 399
 400         schedule_work(&fd->work);
 401
 402         return IRQ_HANDLED;
 403 }
 404
 405 static int fdomain_queue(struct Scsi_Host *sh, struct scsi_cmnd *cmd)
 406 {
 407         struct scsi_pointer *scsi_pointer = fdomain_scsi_pointer(cmd);
 408         struct fdomain *fd = shost_priv(cmd->device->host);
 409         unsigned long flags;
 410
 411         scsi_pointer->Status            = 0;
 412         scsi_pointer->Message           = 0;
 413         scsi_pointer->have_data_in      = 0;
 414         scsi_pointer->sent_command      = 0;
 415         scsi_pointer->phase             = in_arbitration;
 416         scsi_set_resid(cmd, scsi_bufflen(cmd));
 417
 418         spin_lock_irqsave(sh->host_lock, flags);
 419
 420         fd->cur_cmd = cmd;
 421
 422         fdomain_make_bus_idle(fd);
 423
 424         /* Start arbitration */
 425         outb(0, fd->base + REG_ICTL);
 426         outb(0, fd->base + REG_BCTL);   /* Disable data drivers */
 427         /* Set our id bit */
 428         outb(BIT(cmd->device->host->this_id), fd->base + REG_SCSI_DATA_NOACK);
 429         outb(ICTL_ARB, fd->base + REG_ICTL);
 430         /* Start arbitration */
 431         outb(ACTL_ARB | ACTL_IRQEN | PARITY_MASK, fd->base + REG_ACTL);
 432
 433         spin_unlock_irqrestore(sh->host_lock, flags);
 434
 435         return 0;
 436 }
 437
 438 static int fdomain_abort(struct scsi_cmnd *cmd)
 439 {
 440         struct Scsi_Host *sh = cmd->device->host;
 441         struct fdomain *fd = shost_priv(sh);
 442         unsigned long flags;
 443
 444         if (!fd->cur_cmd)
 445                 return FAILED;
 446
 447         spin_lock_irqsave(sh->host_lock, flags);
 448
 449         fdomain_make_bus_idle(fd);
 450         fdomain_scsi_pointer(fd->cur_cmd)->phase |= aborted;
 451
 452         /* Aborts are not done well. . . */
 453         set_host_byte(fd->cur_cmd, DID_ABORT);
 454         fdomain_finish_cmd(fd);
 455         spin_unlock_irqrestore(sh->host_lock, flags);
 456         return SUCCESS;
 457 }
 458
 459 static int fdomain_host_reset(struct scsi_cmnd *cmd)
 460 {
 461         struct Scsi_Host *sh = cmd->device->host;
 462         struct fdomain *fd = shost_priv(sh);
 463         unsigned long flags;
 464
 465         spin_lock_irqsave(sh->host_lock, flags);
 466         fdomain_reset(fd->base);
 467         spin_unlock_irqrestore(sh->host_lock, flags);
 468         return SUCCESS;
 469 }
 470
 471 static int fdomain_biosparam(struct scsi_device *sdev,
 472                              struct block_device *bdev, sector_t capacity,
 473                              int geom[])
 474 {
 475         unsigned char *p = scsi_bios_ptable(bdev);
 476
 477         if (p && p[65] == 0xaa && p[64] == 0x55 /* Partition table valid */
 478             && p[4]) {   /* Partition type */
 479                 geom[0] = p[5] + 1;     /* heads */
 480                 geom[1] = p[6] & 0x3f;  /* sectors */
 481         } else {
 482                 if (capacity >= 0x7e0000) {
 483                         geom[0] = 255;  /* heads */
 484                         geom[1] = 63;   /* sectors */
 485                 } else if (capacity >= 0x200000) {
 486                         geom[0] = 128;  /* heads */
 487                         geom[1] = 63;   /* sectors */
 488                 } else {
 489                         geom[0] = 64;   /* heads */
 490                         geom[1] = 32;   /* sectors */
 491                 }
 492         }
 493         geom[2] = sector_div(capacity, geom[0] * geom[1]);
 494         kfree(p);
 495
 496         return 0;
 497 }
 498
 499 static const struct scsi_host_template fdomain_template = {
 500         .module                 = THIS_MODULE,
 501         .name                   = "Future Domain TMC-16x0",
 502         .proc_name              = "fdomain",
 503         .queuecommand           = fdomain_queue,
 504         .eh_abort_handler       = fdomain_abort,
 505         .eh_host_reset_handler  = fdomain_host_reset,
 506         .bios_param             = fdomain_biosparam,
 507         .can_queue              = 1,
 508         .this_id                = 7,
 509         .sg_tablesize           = 64,
 510         .dma_boundary           = PAGE_SIZE - 1,
 511         .cmd_size               = sizeof(struct scsi_pointer),
 512 };
 513
 514 struct Scsi_Host *fdomain_create(int base, int irq, int this_id,
 515                                  struct device *dev)
 516 {
 517         struct Scsi_Host *sh;
 518         struct fdomain *fd;
 519         enum chip_type chip;
 520         static const char * const chip_names[] = {
 521                 "Unknown", "TMC-1800", "TMC-18C50", "TMC-18C30"
 522         };
 523         unsigned long irq_flags = 0;
 524
 525         chip = fdomain_identify(base);
 526         if (!chip)
 527                 return NULL;
 528
 529         fdomain_reset(base);
 530
 531         if (fdomain_test_loopback(base))
 532                 return NULL;
 533
 534         if (!irq) {
 535                 dev_err(dev, "card has no IRQ assigned");
 536                 return NULL;
 537         }
 538
 539         sh = scsi_host_alloc(&fdomain_template, sizeof(struct fdomain));
 540         if (!sh)
 541                 return NULL;
 542
 543         if (this_id)
 544                 sh->this_id = this_id & 0x07;
 545
 546         sh->irq = irq;
 547         sh->io_port = base;
 548         sh->n_io_port = FDOMAIN_REGION_SIZE;
 549
 550         fd = shost_priv(sh);
 551         fd->base = base;
 552         fd->chip = chip;
 553         INIT_WORK(&fd->work, fdomain_work);
 554
 555         if (dev_is_pci(dev) || !strcmp(dev->bus->name, "pcmcia"))
 556                 irq_flags = IRQF_SHARED;
 557
 558         if (request_irq(irq, fdomain_irq, irq_flags, "fdomain", fd))
 559                 goto fail_put;
 560
 561         shost_printk(KERN_INFO, sh, "%s chip at 0x%x irq %d SCSI ID %d\n",
 562                      dev_is_pci(dev) ? "TMC-36C70 (PCI bus)" : chip_names[chip],
 563                      base, irq, sh->this_id);
 564
 565         if (scsi_add_host(sh, dev))
 566                 goto fail_free_irq;
 567
 568         scsi_scan_host(sh);
 569
 570         return sh;
 571
 572 fail_free_irq:
 573         free_irq(irq, fd);
 574 fail_put:
 575         scsi_host_put(sh);
 576         return NULL;
 577 }
 578 EXPORT_SYMBOL_GPL(fdomain_create);
 579
 580 int fdomain_destroy(struct Scsi_Host *sh)
 581 {
 582         struct fdomain *fd = shost_priv(sh);
 583
 584         cancel_work_sync(&fd->work);
 585         scsi_remove_host(sh);
 586         if (sh->irq)
 587                 free_irq(sh->irq, fd);
 588         scsi_host_put(sh);
 589         return 0;
 590 }
 591 EXPORT_SYMBOL_GPL(fdomain_destroy);
 592
 593 #ifdef CONFIG_PM_SLEEP
 594 static int fdomain_resume(struct device *dev)
 595 {
 596         struct fdomain *fd = shost_priv(dev_get_drvdata(dev));
 597
 598         fdomain_reset(fd->base);
 599         return 0;
 600 }
 601
 602 static SIMPLE_DEV_PM_OPS(fdomain_pm_ops, NULL, fdomain_resume);
 603 #endif /* CONFIG_PM_SLEEP */
 604
 605 MODULE_AUTHOR("Ondrej Zary, Rickard E. Faith");
 606 MODULE_DESCRIPTION("Future Domain TMC-16x0/TMC-3260 SCSI driver");
 607 MODULE_LICENSE("GPL");