err.no Git - linux-2.6/blob - drivers/ide/ide.c

   1 /*
   2  *  Copyright (C) 1994-1998         Linus Torvalds & authors (see below)
   3  *  Copyrifht (C) 2003-2005, 2007   Bartlomiej Zolnierkiewicz
   4  */
   5
   6 /*
   7  *  Mostly written by Mark Lord  <mlord@pobox.com>
   8  *                and Gadi Oxman <gadio@netvision.net.il>
   9  *                and Andre Hedrick <andre@linux-ide.org>
  10  *
  11  *  See linux/MAINTAINERS for address of current maintainer.
  12  *
  13  * This is the multiple IDE interface driver, as evolved from hd.c.
  14  * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs
  15  *   (usually 14 & 15).
  16  * There can be up to two drives per interface, as per the ATA-2 spec.
  17  *
  18  * ...
  19  *
  20  *  From hd.c:
  21  *  |
  22  *  | It traverses the request-list, using interrupts to jump between functions.
  23  *  | As nearly all functions can be called within interrupts, we may not sleep.
  24  *  | Special care is recommended.  Have Fun!
  25  *  |
  26  *  | modified by Drew Eckhardt to check nr of hd's from the CMOS.
  27  *  |
  28  *  | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
  29  *  | in the early extended-partition checks and added DM partitions.
  30  *  |
  31  *  | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
  32  *  |
  33  *  | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
  34  *  | and general streamlining by Mark Lord (mlord@pobox.com).
  35  *
  36  *  October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
  37  *
  38  *      Mark Lord       (mlord@pobox.com)               (IDE Perf.Pkg)
  39  *      Delman Lee      (delman@ieee.org)               ("Mr. atdisk2")
  40  *      Scott Snyder    (snyder@fnald0.fnal.gov)        (ATAPI IDE cd-rom)
  41  *
  42  *  This was a rewrite of just about everything from hd.c, though some original
  43  *  code is still sprinkled about.  Think of it as a major evolution, with
  44  *  inspiration from lots of linux users, esp.  hamish@zot.apana.org.au
  45  */
  46
  47 #define _IDE_C                  /* Tell ide.h it's really us */
  48
  49 #include <linux/module.h>
  50 #include <linux/types.h>
  51 #include <linux/string.h>
  52 #include <linux/kernel.h>
  53 #include <linux/timer.h>
  54 #include <linux/mm.h>
  55 #include <linux/interrupt.h>
  56 #include <linux/major.h>
  57 #include <linux/errno.h>
  58 #include <linux/genhd.h>
  59 #include <linux/blkpg.h>
  60 #include <linux/slab.h>
  61 #include <linux/init.h>
  62 #include <linux/pci.h>
  63 #include <linux/delay.h>
  64 #include <linux/ide.h>
  65 #include <linux/completion.h>
  66 #include <linux/reboot.h>
  67 #include <linux/cdrom.h>
  68 #include <linux/seq_file.h>
  69 #include <linux/device.h>
  70 #include <linux/bitops.h>
  71
  72 #include <asm/byteorder.h>
  73 #include <asm/irq.h>
  74 #include <asm/uaccess.h>
  75 #include <asm/io.h>
  76
  77
  78 /* default maximum number of failures */
  79 #define IDE_DEFAULT_MAX_FAILURES        1
  80
  81 struct class *ide_port_class;
  82
  83 static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
  84                                         IDE2_MAJOR, IDE3_MAJOR,
  85                                         IDE4_MAJOR, IDE5_MAJOR,
  86                                         IDE6_MAJOR, IDE7_MAJOR,
  87                                         IDE8_MAJOR, IDE9_MAJOR };
  88
  89 DEFINE_MUTEX(ide_cfg_mtx);
  90  __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
  91
  92 int noautodma = 0;
  93
  94 ide_hwif_t ide_hwifs[MAX_HWIFS];        /* master data repository */
  95
  96 static void ide_port_init_devices_data(ide_hwif_t *);
  97
  98 /*
  99  * Do not even *think* about calling this!
 100  */
 101 void ide_init_port_data(ide_hwif_t *hwif, unsigned int index)
 102 {
 103         /* bulk initialize hwif & drive info with zeros */
 104         memset(hwif, 0, sizeof(ide_hwif_t));
 105
 106         /* fill in any non-zero initial values */
 107         hwif->index     = index;
 108         hwif->major     = ide_hwif_to_major[index];
 109
 110         hwif->name[0]   = 'i';
 111         hwif->name[1]   = 'd';
 112         hwif->name[2]   = 'e';
 113         hwif->name[3]   = '0' + index;
 114
 115         hwif->bus_state = BUSSTATE_ON;
 116
 117         init_completion(&hwif->gendev_rel_comp);
 118
 119         default_hwif_iops(hwif);
 120         default_hwif_transport(hwif);
 121
 122         ide_port_init_devices_data(hwif);
 123 }
 124 EXPORT_SYMBOL_GPL(ide_init_port_data);
 125
 126 static void ide_port_init_devices_data(ide_hwif_t *hwif)
 127 {
 128         int unit;
 129
 130         for (unit = 0; unit < MAX_DRIVES; ++unit) {
 131                 ide_drive_t *drive = &hwif->drives[unit];
 132                 u8 j = (hwif->index * MAX_DRIVES) + unit;
 133
 134                 memset(drive, 0, sizeof(*drive));
 135
 136                 drive->media                    = ide_disk;
 137                 drive->select.all               = (unit<<4)|0xa0;
 138                 drive->hwif                     = hwif;
 139                 drive->ctl                      = 0x08;
 140                 drive->ready_stat               = READY_STAT;
 141                 drive->bad_wstat                = BAD_W_STAT;
 142                 drive->special.b.recalibrate    = 1;
 143                 drive->special.b.set_geometry   = 1;
 144                 drive->name[0]                  = 'h';
 145                 drive->name[1]                  = 'd';
 146                 drive->name[2]                  = 'a' + j;
 147                 drive->max_failures             = IDE_DEFAULT_MAX_FAILURES;
 148
 149                 INIT_LIST_HEAD(&drive->list);
 150                 init_completion(&drive->gendev_rel_comp);
 151         }
 152 }
 153
 154 /*
 155  * init_ide_data() sets reasonable default values into all fields
 156  * of all instances of the hwifs and drives, but only on the first call.
 157  * Subsequent calls have no effect (they don't wipe out anything).
 158  *
 159  * This routine is normally called at driver initialization time,
 160  * but may also be called MUCH earlier during kernel "command-line"
 161  * parameter processing.  As such, we cannot depend on any other parts
 162  * of the kernel (such as memory allocation) to be functioning yet.
 163  *
 164  * This is too bad, as otherwise we could dynamically allocate the
 165  * ide_drive_t structs as needed, rather than always consuming memory
 166  * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
 167  *
 168  * FIXME: We should stuff the setup data into __init and copy the
 169  * relevant hwifs/allocate them properly during boot.
 170  */
 171 #define MAGIC_COOKIE 0x12345678
 172 static void __init init_ide_data (void)
 173 {
 174         unsigned int index;
 175         static unsigned long magic_cookie = MAGIC_COOKIE;
 176
 177         if (magic_cookie != MAGIC_COOKIE)
 178                 return;         /* already initialized */
 179         magic_cookie = 0;
 180
 181         /* Initialise all interface structures */
 182         for (index = 0; index < MAX_HWIFS; ++index) {
 183                 ide_hwif_t *hwif = &ide_hwifs[index];
 184
 185                 ide_init_port_data(hwif, index);
 186         }
 187 }
 188
 189 void ide_remove_port_from_hwgroup(ide_hwif_t *hwif)
 190 {
 191         ide_hwgroup_t *hwgroup = hwif->hwgroup;
 192
 193         spin_lock_irq(&ide_lock);
 194         /*
 195          * Remove us from the hwgroup, and free
 196          * the hwgroup if we were the only member
 197          */
 198         if (hwif->next == hwif) {
 199                 BUG_ON(hwgroup->hwif != hwif);
 200                 kfree(hwgroup);
 201         } else {
 202                 /* There is another interface in hwgroup.
 203                  * Unlink us, and set hwgroup->drive and ->hwif to
 204                  * something sane.
 205                  */
 206                 ide_hwif_t *g = hwgroup->hwif;
 207
 208                 while (g->next != hwif)
 209                         g = g->next;
 210                 g->next = hwif->next;
 211                 if (hwgroup->hwif == hwif) {
 212                         /* Chose a random hwif for hwgroup->hwif.
 213                          * It's guaranteed that there are no drives
 214                          * left in the hwgroup.
 215                          */
 216                         BUG_ON(hwgroup->drive != NULL);
 217                         hwgroup->hwif = g;
 218                 }
 219                 BUG_ON(hwgroup->hwif == hwif);
 220         }
 221         spin_unlock_irq(&ide_lock);
 222 }
 223
 224 /* Called with ide_lock held. */
 225 static void __ide_port_unregister_devices(ide_hwif_t *hwif)
 226 {
 227         int i;
 228
 229         for (i = 0; i < MAX_DRIVES; i++) {
 230                 ide_drive_t *drive = &hwif->drives[i];
 231
 232                 if (drive->present) {
 233                         spin_unlock_irq(&ide_lock);
 234                         device_unregister(&drive->gendev);
 235                         wait_for_completion(&drive->gendev_rel_comp);
 236                         spin_lock_irq(&ide_lock);
 237                 }
 238         }
 239 }
 240
 241 void ide_port_unregister_devices(ide_hwif_t *hwif)
 242 {
 243         mutex_lock(&ide_cfg_mtx);
 244         spin_lock_irq(&ide_lock);
 245         __ide_port_unregister_devices(hwif);
 246         hwif->present = 0;
 247         ide_port_init_devices_data(hwif);
 248         spin_unlock_irq(&ide_lock);
 249         mutex_unlock(&ide_cfg_mtx);
 250 }
 251 EXPORT_SYMBOL_GPL(ide_port_unregister_devices);
 252
 253 /**
 254  *      ide_unregister          -       free an IDE interface
 255  *      @hwif: IDE interface
 256  *
 257  *      Perform the final unregister of an IDE interface. At the moment
 258  *      we don't refcount interfaces so this will also get split up.
 259  *
 260  *      Locking:
 261  *      The caller must not hold the IDE locks
 262  *      The drive present/vanishing is not yet properly locked
 263  *      Take care with the callbacks. These have been split to avoid
 264  *      deadlocking the IDE layer. The shutdown callback is called
 265  *      before we take the lock and free resources. It is up to the
 266  *      caller to be sure there is no pending I/O here, and that
 267  *      the interface will not be reopened (present/vanishing locking
 268  *      isn't yet done BTW). After we commit to the final kill we
 269  *      call the cleanup callback with the ide locks held.
 270  *
 271  *      Unregister restores the hwif structures to the default state.
 272  *      This is raving bonkers.
 273  */
 274
 275 void ide_unregister(ide_hwif_t *hwif)
 276 {
 277         ide_hwif_t *g;
 278         ide_hwgroup_t *hwgroup;
 279         int irq_count = 0;
 280
 281         BUG_ON(in_interrupt());
 282         BUG_ON(irqs_disabled());
 283
 284         mutex_lock(&ide_cfg_mtx);
 285
 286         spin_lock_irq(&ide_lock);
 287         if (hwif->present) {
 288                 __ide_port_unregister_devices(hwif);
 289                 hwif->present = 0;
 290         }
 291         spin_unlock_irq(&ide_lock);
 292
 293         ide_proc_unregister_port(hwif);
 294
 295         hwgroup = hwif->hwgroup;
 296         /*
 297          * free the irq if we were the only hwif using it
 298          */
 299         g = hwgroup->hwif;
 300         do {
 301                 if (g->irq == hwif->irq)
 302                         ++irq_count;
 303                 g = g->next;
 304         } while (g != hwgroup->hwif);
 305         if (irq_count == 1)
 306                 free_irq(hwif->irq, hwgroup);
 307
 308         ide_remove_port_from_hwgroup(hwif);
 309
 310         device_unregister(hwif->portdev);
 311         device_unregister(&hwif->gendev);
 312         wait_for_completion(&hwif->gendev_rel_comp);
 313
 314         /*
 315          * Remove us from the kernel's knowledge
 316          */
 317         blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
 318         kfree(hwif->sg_table);
 319         unregister_blkdev(hwif->major, hwif->name);
 320
 321         if (hwif->dma_base)
 322                 ide_release_dma_engine(hwif);
 323
 324         spin_lock_irq(&ide_lock);
 325         /* restore hwif data to pristine status */
 326         ide_init_port_data(hwif, hwif->index);
 327         spin_unlock_irq(&ide_lock);
 328
 329         mutex_unlock(&ide_cfg_mtx);
 330 }
 331
 332 EXPORT_SYMBOL(ide_unregister);
 333
 334 void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw)
 335 {
 336         memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports));
 337         hwif->irq = hw->irq;
 338         hwif->chipset = hw->chipset;
 339         hwif->gendev.parent = hw->dev;
 340         hwif->ack_intr = hw->ack_intr;
 341 }
 342 EXPORT_SYMBOL_GPL(ide_init_port_hw);
 343
 344 /*
 345  *      Locks for IDE setting functionality
 346  */
 347
 348 DEFINE_MUTEX(ide_setting_mtx);
 349
 350 EXPORT_SYMBOL_GPL(ide_setting_mtx);
 351
 352 /**
 353  *      ide_spin_wait_hwgroup   -       wait for group
 354  *      @drive: drive in the group
 355  *
 356  *      Wait for an IDE device group to go non busy and then return
 357  *      holding the ide_lock which guards the hwgroup->busy status
 358  *      and right to use it.
 359  */
 360
 361 int ide_spin_wait_hwgroup (ide_drive_t *drive)
 362 {
 363         ide_hwgroup_t *hwgroup = HWGROUP(drive);
 364         unsigned long timeout = jiffies + (3 * HZ);
 365
 366         spin_lock_irq(&ide_lock);
 367
 368         while (hwgroup->busy) {
 369                 unsigned long lflags;
 370                 spin_unlock_irq(&ide_lock);
 371                 local_irq_set(lflags);
 372                 if (time_after(jiffies, timeout)) {
 373                         local_irq_restore(lflags);
 374                         printk(KERN_ERR "%s: channel busy\n", drive->name);
 375                         return -EBUSY;
 376                 }
 377                 local_irq_restore(lflags);
 378                 spin_lock_irq(&ide_lock);
 379         }
 380         return 0;
 381 }
 382
 383 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
 384
 385 int set_io_32bit(ide_drive_t *drive, int arg)
 386 {
 387         if (drive->no_io_32bit)
 388                 return -EPERM;
 389
 390         if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
 391                 return -EINVAL;
 392
 393         if (ide_spin_wait_hwgroup(drive))
 394                 return -EBUSY;
 395
 396         drive->io_32bit = arg;
 397
 398         spin_unlock_irq(&ide_lock);
 399
 400         return 0;
 401 }
 402
 403 static int set_ksettings(ide_drive_t *drive, int arg)
 404 {
 405         if (arg < 0 || arg > 1)
 406                 return -EINVAL;
 407
 408         if (ide_spin_wait_hwgroup(drive))
 409                 return -EBUSY;
 410         drive->keep_settings = arg;
 411         spin_unlock_irq(&ide_lock);
 412
 413         return 0;
 414 }
 415
 416 int set_using_dma(ide_drive_t *drive, int arg)
 417 {
 418 #ifdef CONFIG_BLK_DEV_IDEDMA
 419         ide_hwif_t *hwif = drive->hwif;
 420         int err = -EPERM;
 421
 422         if (arg < 0 || arg > 1)
 423                 return -EINVAL;
 424
 425         if (!drive->id || !(drive->id->capability & 1))
 426                 goto out;
 427
 428         if (hwif->dma_ops == NULL)
 429                 goto out;
 430
 431         err = -EBUSY;
 432         if (ide_spin_wait_hwgroup(drive))
 433                 goto out;
 434         /*
 435          * set ->busy flag, unlock and let it ride
 436          */
 437         hwif->hwgroup->busy = 1;
 438         spin_unlock_irq(&ide_lock);
 439
 440         err = 0;
 441
 442         if (arg) {
 443                 if (ide_set_dma(drive))
 444                         err = -EIO;
 445         } else
 446                 ide_dma_off(drive);
 447
 448         /*
 449          * lock, clear ->busy flag and unlock before leaving
 450          */
 451         spin_lock_irq(&ide_lock);
 452         hwif->hwgroup->busy = 0;
 453         spin_unlock_irq(&ide_lock);
 454 out:
 455         return err;
 456 #else
 457         if (arg < 0 || arg > 1)
 458                 return -EINVAL;
 459
 460         return -EPERM;
 461 #endif
 462 }
 463
 464 int set_pio_mode(ide_drive_t *drive, int arg)
 465 {
 466         struct request *rq;
 467         ide_hwif_t *hwif = drive->hwif;
 468         const struct ide_port_ops *port_ops = hwif->port_ops;
 469
 470         if (arg < 0 || arg > 255)
 471                 return -EINVAL;
 472
 473         if (port_ops == NULL || port_ops->set_pio_mode == NULL ||
 474             (hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
 475                 return -ENOSYS;
 476
 477         if (drive->special.b.set_tune)
 478                 return -EBUSY;
 479
 480         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
 481         rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
 482
 483         drive->tune_req = (u8) arg;
 484         drive->special.b.set_tune = 1;
 485
 486         blk_execute_rq(drive->queue, NULL, rq, 0);
 487         blk_put_request(rq);
 488
 489         return 0;
 490 }
 491
 492 static int set_unmaskirq(ide_drive_t *drive, int arg)
 493 {
 494         if (drive->no_unmask)
 495                 return -EPERM;
 496
 497         if (arg < 0 || arg > 1)
 498                 return -EINVAL;
 499
 500         if (ide_spin_wait_hwgroup(drive))
 501                 return -EBUSY;
 502         drive->unmask = arg;
 503         spin_unlock_irq(&ide_lock);
 504
 505         return 0;
 506 }
 507
 508 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
 509 {
 510         ide_drive_t *drive = dev->driver_data;
 511         ide_hwif_t *hwif = HWIF(drive);
 512         struct request *rq;
 513         struct request_pm_state rqpm;
 514         ide_task_t args;
 515         int ret;
 516
 517         /* Call ACPI _GTM only once */
 518         if (!(drive->dn % 2))
 519                 ide_acpi_get_timing(hwif);
 520
 521         memset(&rqpm, 0, sizeof(rqpm));
 522         memset(&args, 0, sizeof(args));
 523         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
 524         rq->cmd_type = REQ_TYPE_PM_SUSPEND;
 525         rq->special = &args;
 526         rq->data = &rqpm;
 527         rqpm.pm_step = ide_pm_state_start_suspend;
 528         if (mesg.event == PM_EVENT_PRETHAW)
 529                 mesg.event = PM_EVENT_FREEZE;
 530         rqpm.pm_state = mesg.event;
 531
 532         ret = blk_execute_rq(drive->queue, NULL, rq, 0);
 533         blk_put_request(rq);
 534         /* only call ACPI _PS3 after both drivers are suspended */
 535         if (!ret && (((drive->dn % 2) && hwif->drives[0].present
 536                  && hwif->drives[1].present)
 537                  || !hwif->drives[0].present
 538                  || !hwif->drives[1].present))
 539                 ide_acpi_set_state(hwif, 0);
 540         return ret;
 541 }
 542
 543 static int generic_ide_resume(struct device *dev)
 544 {
 545         ide_drive_t *drive = dev->driver_data;
 546         ide_hwif_t *hwif = HWIF(drive);
 547         struct request *rq;
 548         struct request_pm_state rqpm;
 549         ide_task_t args;
 550         int err;
 551
 552         /* Call ACPI _STM only once */
 553         if (!(drive->dn % 2)) {
 554                 ide_acpi_set_state(hwif, 1);
 555                 ide_acpi_push_timing(hwif);
 556         }
 557
 558         ide_acpi_exec_tfs(drive);
 559
 560         memset(&rqpm, 0, sizeof(rqpm));
 561         memset(&args, 0, sizeof(args));
 562         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
 563         rq->cmd_type = REQ_TYPE_PM_RESUME;
 564         rq->cmd_flags |= REQ_PREEMPT;
 565         rq->special = &args;
 566         rq->data = &rqpm;
 567         rqpm.pm_step = ide_pm_state_start_resume;
 568         rqpm.pm_state = PM_EVENT_ON;
 569
 570         err = blk_execute_rq(drive->queue, NULL, rq, 1);
 571         blk_put_request(rq);
 572
 573         if (err == 0 && dev->driver) {
 574                 ide_driver_t *drv = to_ide_driver(dev->driver);
 575
 576                 if (drv->resume)
 577                         drv->resume(drive);
 578         }
 579
 580         return err;
 581 }
 582
 583 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
 584                         unsigned int cmd, unsigned long arg)
 585 {
 586         unsigned long flags;
 587         ide_driver_t *drv;
 588         void __user *p = (void __user *)arg;
 589         int err = 0, (*setfunc)(ide_drive_t *, int);
 590         u8 *val;
 591
 592         switch (cmd) {
 593         case HDIO_GET_32BIT:        val = &drive->io_32bit;      goto read_val;
 594         case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
 595         case HDIO_GET_UNMASKINTR:   val = &drive->unmask;        goto read_val;
 596         case HDIO_GET_DMA:          val = &drive->using_dma;     goto read_val;
 597         case HDIO_SET_32BIT:        setfunc = set_io_32bit;      goto set_val;
 598         case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings;     goto set_val;
 599         case HDIO_SET_PIO_MODE:     setfunc = set_pio_mode;      goto set_val;
 600         case HDIO_SET_UNMASKINTR:   setfunc = set_unmaskirq;     goto set_val;
 601         case HDIO_SET_DMA:          setfunc = set_using_dma;     goto set_val;
 602         }
 603
 604         switch (cmd) {
 605                 case HDIO_OBSOLETE_IDENTITY:
 606                 case HDIO_GET_IDENTITY:
 607                         if (bdev != bdev->bd_contains)
 608                                 return -EINVAL;
 609                         if (drive->id_read == 0)
 610                                 return -ENOMSG;
 611                         if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
 612                                 return -EFAULT;
 613                         return 0;
 614
 615                 case HDIO_GET_NICE:
 616                         return put_user(drive->dsc_overlap      <<      IDE_NICE_DSC_OVERLAP    |
 617                                         drive->atapi_overlap    <<      IDE_NICE_ATAPI_OVERLAP  |
 618                                         drive->nice1 << IDE_NICE_1,
 619                                         (long __user *) arg);
 620 #ifdef CONFIG_IDE_TASK_IOCTL
 621                 case HDIO_DRIVE_TASKFILE:
 622                         if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
 623                                 return -EACCES;
 624                         switch(drive->media) {
 625                                 case ide_disk:
 626                                         return ide_taskfile_ioctl(drive, cmd, arg);
 627                                 default:
 628                                         return -ENOMSG;
 629                         }
 630 #endif /* CONFIG_IDE_TASK_IOCTL */
 631
 632                 case HDIO_DRIVE_CMD:
 633                         if (!capable(CAP_SYS_RAWIO))
 634                                 return -EACCES;
 635                         return ide_cmd_ioctl(drive, cmd, arg);
 636
 637                 case HDIO_DRIVE_TASK:
 638                         if (!capable(CAP_SYS_RAWIO))
 639                                 return -EACCES;
 640                         return ide_task_ioctl(drive, cmd, arg);
 641                 case HDIO_SET_NICE:
 642                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
 643                         if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
 644                                 return -EPERM;
 645                         drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
 646                         drv = *(ide_driver_t **)bdev->bd_disk->private_data;
 647                         if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
 648                                 drive->dsc_overlap = 0;
 649                                 return -EPERM;
 650                         }
 651                         drive->nice1 = (arg >> IDE_NICE_1) & 1;
 652                         return 0;
 653                 case HDIO_DRIVE_RESET:
 654                         if (!capable(CAP_SYS_ADMIN))
 655                                 return -EACCES;
 656
 657                         /*
 658                          *      Abort the current command on the
 659                          *      group if there is one, taking
 660                          *      care not to allow anything else
 661                          *      to be queued and to die on the
 662                          *      spot if we miss one somehow
 663                          */
 664
 665                         spin_lock_irqsave(&ide_lock, flags);
 666
 667                         if (HWGROUP(drive)->resetting) {
 668                                 spin_unlock_irqrestore(&ide_lock, flags);
 669                                 return -EBUSY;
 670                         }
 671
 672                         ide_abort(drive, "drive reset");
 673
 674                         BUG_ON(HWGROUP(drive)->handler);
 675
 676                         /* Ensure nothing gets queued after we
 677                            drop the lock. Reset will clear the busy */
 678
 679                         HWGROUP(drive)->busy = 1;
 680                         spin_unlock_irqrestore(&ide_lock, flags);
 681                         (void) ide_do_reset(drive);
 682
 683                         return 0;
 684                 case HDIO_GET_BUSSTATE:
 685                         if (!capable(CAP_SYS_ADMIN))
 686                                 return -EACCES;
 687                         if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
 688                                 return -EFAULT;
 689                         return 0;
 690
 691                 case HDIO_SET_BUSSTATE:
 692                         if (!capable(CAP_SYS_ADMIN))
 693                                 return -EACCES;
 694                         return -EOPNOTSUPP;
 695                 default:
 696                         return -EINVAL;
 697         }
 698
 699 read_val:
 700         mutex_lock(&ide_setting_mtx);
 701         spin_lock_irqsave(&ide_lock, flags);
 702         err = *val;
 703         spin_unlock_irqrestore(&ide_lock, flags);
 704         mutex_unlock(&ide_setting_mtx);
 705         return err >= 0 ? put_user(err, (long __user *)arg) : err;
 706
 707 set_val:
 708         if (bdev != bdev->bd_contains)
 709                 err = -EINVAL;
 710         else {
 711                 if (!capable(CAP_SYS_ADMIN))
 712                         err = -EACCES;
 713                 else {
 714                         mutex_lock(&ide_setting_mtx);
 715                         err = setfunc(drive, arg);
 716                         mutex_unlock(&ide_setting_mtx);
 717                 }
 718         }
 719         return err;
 720 }
 721
 722 EXPORT_SYMBOL(generic_ide_ioctl);
 723
 724 /*
 725  * stridx() returns the offset of c within s,
 726  * or -1 if c is '\0' or not found within s.
 727  */
 728 static int __init stridx (const char *s, char c)
 729 {
 730         char *i = strchr(s, c);
 731         return (i && c) ? i - s : -1;
 732 }
 733
 734 /*
 735  * match_parm() does parsing for ide_setup():
 736  *
 737  * 1. the first char of s must be '='.
 738  * 2. if the remainder matches one of the supplied keywords,
 739  *     the index (1 based) of the keyword is negated and returned.
 740  * 3. if the remainder is a series of no more than max_vals numbers
 741  *     separated by commas, the numbers are saved in vals[] and a
 742  *     count of how many were saved is returned.  Base10 is assumed,
 743  *     and base16 is allowed when prefixed with "0x".
 744  * 4. otherwise, zero is returned.
 745  */
 746 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
 747 {
 748         static const char *decimal = "0123456789";
 749         static const char *hex = "0123456789abcdef";
 750         int i, n;
 751
 752         if (*s++ == '=') {
 753                 /*
 754                  * Try matching against the supplied keywords,
 755                  * and return -(index+1) if we match one
 756                  */
 757                 if (keywords != NULL) {
 758                         for (i = 0; *keywords != NULL; ++i) {
 759                                 if (!strcmp(s, *keywords++))
 760                                         return -(i+1);
 761                         }
 762                 }
 763                 /*
 764                  * Look for a series of no more than "max_vals"
 765                  * numeric values separated by commas, in base10,
 766                  * or base16 when prefixed with "0x".
 767                  * Return a count of how many were found.
 768                  */
 769                 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
 770                         vals[n] = i;
 771                         while ((i = stridx(decimal, *++s)) >= 0)
 772                                 vals[n] = (vals[n] * 10) + i;
 773                         if (*s == 'x' && !vals[n]) {
 774                                 while ((i = stridx(hex, *++s)) >= 0)
 775                                         vals[n] = (vals[n] * 0x10) + i;
 776                         }
 777                         if (++n == max_vals)
 778                                 break;
 779                         if (*s == ',' || *s == ';')
 780                                 ++s;
 781                 }
 782                 if (!*s)
 783                         return n;
 784         }
 785         return 0;       /* zero = nothing matched */
 786 }
 787
 788 /*
 789  * ide_setup() gets called VERY EARLY during initialization,
 790  * to handle kernel "command line" strings beginning with "hdx=" or "ide".
 791  *
 792  * Remember to update Documentation/ide/ide.txt if you change something here.
 793  */
 794 static int __init ide_setup(char *s)
 795 {
 796         ide_hwif_t *hwif;
 797         ide_drive_t *drive;
 798         unsigned int hw, unit;
 799         int vals[3];
 800         const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
 801
 802         if (strncmp(s,"hd",2) == 0 && s[2] == '=')      /* hd= is for hd.c   */
 803                 return 0;                               /* driver and not us */
 804
 805         if (strncmp(s, "ide", 3) && strncmp(s, "hd", 2))
 806                 return 0;
 807
 808         printk(KERN_INFO "ide_setup: %s", s);
 809         init_ide_data ();
 810
 811 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
 812         if (!strcmp(s, "ide=doubler")) {
 813                 extern int ide_doubler;
 814
 815                 printk(" : Enabled support for IDE doublers\n");
 816                 ide_doubler = 1;
 817                 goto obsolete_option;
 818         }
 819 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
 820
 821         if (!strcmp(s, "ide=nodma")) {
 822                 printk(" : Prevented DMA\n");
 823                 noautodma = 1;
 824                 goto obsolete_option;
 825         }
 826
 827 #ifdef CONFIG_BLK_DEV_IDEACPI
 828         if (!strcmp(s, "ide=noacpi")) {
 829                 //printk(" : Disable IDE ACPI support.\n");
 830                 ide_noacpi = 1;
 831                 goto obsolete_option;
 832         }
 833         if (!strcmp(s, "ide=acpigtf")) {
 834                 //printk(" : Enable IDE ACPI _GTF support.\n");
 835                 ide_acpigtf = 1;
 836                 goto obsolete_option;
 837         }
 838         if (!strcmp(s, "ide=acpionboot")) {
 839                 //printk(" : Call IDE ACPI methods on boot.\n");
 840                 ide_acpionboot = 1;
 841                 goto obsolete_option;
 842         }
 843 #endif /* CONFIG_BLK_DEV_IDEACPI */
 844
 845         /*
 846          * Look for drive options:  "hdx="
 847          */
 848         if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
 849                 const char *hd_words[] = {
 850                         "none", "noprobe", "nowerr", "cdrom", "nodma",
 851                         "-6", "-7", "-8", "-9", "-10",
 852                         "noflush", "remap", "remap63", "scsi", NULL };
 853                 unit = s[2] - 'a';
 854                 hw   = unit / MAX_DRIVES;
 855                 unit = unit % MAX_DRIVES;
 856                 hwif = &ide_hwifs[hw];
 857                 drive = &hwif->drives[unit];
 858                 if (strncmp(s + 4, "ide-", 4) == 0) {
 859                         strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
 860                         goto obsolete_option;
 861                 }
 862                 switch (match_parm(&s[3], hd_words, vals, 3)) {
 863                         case -1: /* "none" */
 864                         case -2: /* "noprobe" */
 865                                 drive->noprobe = 1;
 866                                 goto obsolete_option;
 867                         case -3: /* "nowerr" */
 868                                 drive->bad_wstat = BAD_R_STAT;
 869                                 goto obsolete_option;
 870                         case -4: /* "cdrom" */
 871                                 drive->present = 1;
 872                                 drive->media = ide_cdrom;
 873                                 /* an ATAPI device ignores DRDY */
 874                                 drive->ready_stat = 0;
 875                                 goto obsolete_option;
 876                         case -5: /* nodma */
 877                                 drive->nodma = 1;
 878                                 goto obsolete_option;
 879                         case -11: /* noflush */
 880                                 drive->noflush = 1;
 881                                 goto obsolete_option;
 882                         case -12: /* "remap" */
 883                                 drive->remap_0_to_1 = 1;
 884                                 goto obsolete_option;
 885                         case -13: /* "remap63" */
 886                                 drive->sect0 = 63;
 887                                 goto obsolete_option;
 888                         case -14: /* "scsi" */
 889                                 drive->scsi = 1;
 890                                 goto obsolete_option;
 891                         case 3: /* cyl,head,sect */
 892                                 drive->media    = ide_disk;
 893                                 drive->ready_stat = READY_STAT;
 894                                 drive->cyl      = drive->bios_cyl  = vals[0];
 895                                 drive->head     = drive->bios_head = vals[1];
 896                                 drive->sect     = drive->bios_sect = vals[2];
 897                                 drive->present  = 1;
 898                                 drive->forced_geom = 1;
 899                                 goto obsolete_option;
 900                         default:
 901                                 goto bad_option;
 902                 }
 903         }
 904
 905 bad_option:
 906         printk(" -- BAD OPTION\n");
 907         return 1;
 908 obsolete_option:
 909         printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
 910         return 1;
 911 }
 912
 913 EXPORT_SYMBOL(ide_lock);
 914
 915 static int ide_bus_match(struct device *dev, struct device_driver *drv)
 916 {
 917         return 1;
 918 }
 919
 920 static char *media_string(ide_drive_t *drive)
 921 {
 922         switch (drive->media) {
 923         case ide_disk:
 924                 return "disk";
 925         case ide_cdrom:
 926                 return "cdrom";
 927         case ide_tape:
 928                 return "tape";
 929         case ide_floppy:
 930                 return "floppy";
 931         case ide_optical:
 932                 return "optical";
 933         default:
 934                 return "UNKNOWN";
 935         }
 936 }
 937
 938 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
 939 {
 940         ide_drive_t *drive = to_ide_device(dev);
 941         return sprintf(buf, "%s\n", media_string(drive));
 942 }
 943
 944 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
 945 {
 946         ide_drive_t *drive = to_ide_device(dev);
 947         return sprintf(buf, "%s\n", drive->name);
 948 }
 949
 950 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
 951 {
 952         ide_drive_t *drive = to_ide_device(dev);
 953         return sprintf(buf, "ide:m-%s\n", media_string(drive));
 954 }
 955
 956 static ssize_t model_show(struct device *dev, struct device_attribute *attr,
 957                           char *buf)
 958 {
 959         ide_drive_t *drive = to_ide_device(dev);
 960         return sprintf(buf, "%s\n", drive->id->model);
 961 }
 962
 963 static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
 964                              char *buf)
 965 {
 966         ide_drive_t *drive = to_ide_device(dev);
 967         return sprintf(buf, "%s\n", drive->id->fw_rev);
 968 }
 969
 970 static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
 971                            char *buf)
 972 {
 973         ide_drive_t *drive = to_ide_device(dev);
 974         return sprintf(buf, "%s\n", drive->id->serial_no);
 975 }
 976
 977 static struct device_attribute ide_dev_attrs[] = {
 978         __ATTR_RO(media),
 979         __ATTR_RO(drivename),
 980         __ATTR_RO(modalias),
 981         __ATTR_RO(model),
 982         __ATTR_RO(firmware),
 983         __ATTR(serial, 0400, serial_show, NULL),
 984         __ATTR_NULL
 985 };
 986
 987 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
 988 {
 989         ide_drive_t *drive = to_ide_device(dev);
 990
 991         add_uevent_var(env, "MEDIA=%s", media_string(drive));
 992         add_uevent_var(env, "DRIVENAME=%s", drive->name);
 993         add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
 994         return 0;
 995 }
 996
 997 static int generic_ide_probe(struct device *dev)
 998 {
 999         ide_drive_t *drive = to_ide_device(dev);
1000         ide_driver_t *drv = to_ide_driver(dev->driver);
1001
1002         return drv->probe ? drv->probe(drive) : -ENODEV;
1003 }
1004
1005 static int generic_ide_remove(struct device *dev)
1006 {
1007         ide_drive_t *drive = to_ide_device(dev);
1008         ide_driver_t *drv = to_ide_driver(dev->driver);
1009
1010         if (drv->remove)
1011                 drv->remove(drive);
1012
1013         return 0;
1014 }
1015
1016 static void generic_ide_shutdown(struct device *dev)
1017 {
1018         ide_drive_t *drive = to_ide_device(dev);
1019         ide_driver_t *drv = to_ide_driver(dev->driver);
1020
1021         if (dev->driver && drv->shutdown)
1022                 drv->shutdown(drive);
1023 }
1024
1025 struct bus_type ide_bus_type = {
1026         .name           = "ide",
1027         .match          = ide_bus_match,
1028         .uevent         = ide_uevent,
1029         .probe          = generic_ide_probe,
1030         .remove         = generic_ide_remove,
1031         .shutdown       = generic_ide_shutdown,
1032         .dev_attrs      = ide_dev_attrs,
1033         .suspend        = generic_ide_suspend,
1034         .resume         = generic_ide_resume,
1035 };
1036
1037 EXPORT_SYMBOL_GPL(ide_bus_type);
1038
1039 int ide_vlb_clk;
1040 EXPORT_SYMBOL_GPL(ide_vlb_clk);
1041
1042 module_param_named(vlb_clock, ide_vlb_clk, int, 0);
1043 MODULE_PARM_DESC(vlb_clock, "VLB clock frequency (in MHz)");
1044
1045 int ide_pci_clk;
1046 EXPORT_SYMBOL_GPL(ide_pci_clk);
1047
1048 module_param_named(pci_clock, ide_pci_clk, int, 0);
1049 MODULE_PARM_DESC(pci_clock, "PCI bus clock frequency (in MHz)");
1050
1051 static int ide_set_dev_param_mask(const char *s, struct kernel_param *kp)
1052 {
1053         int a, b, i, j = 1;
1054         unsigned int *dev_param_mask = (unsigned int *)kp->arg;
1055
1056         if (sscanf(s, "%d.%d:%d", &a, &b, &j) != 3 &&
1057             sscanf(s, "%d.%d", &a, &b) != 2)
1058                 return -EINVAL;
1059
1060         i = a * MAX_DRIVES + b;
1061
1062         if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1)
1063                 return -EINVAL;
1064
1065         if (j)
1066                 *dev_param_mask |= (1 << i);
1067         else
1068                 *dev_param_mask &= (1 << i);
1069
1070         return 0;
1071 }
1072
1073 static unsigned int ide_nodma;
1074
1075 module_param_call(nodma, ide_set_dev_param_mask, NULL, &ide_nodma, 0);
1076 MODULE_PARM_DESC(nodma, "disallow DMA for a device");
1077
1078 static unsigned int ide_noflush;
1079
1080 module_param_call(noflush, ide_set_dev_param_mask, NULL, &ide_noflush, 0);
1081 MODULE_PARM_DESC(noflush, "disable flush requests for a device");
1082
1083 static unsigned int ide_noprobe;
1084
1085 module_param_call(noprobe, ide_set_dev_param_mask, NULL, &ide_noprobe, 0);
1086 MODULE_PARM_DESC(noprobe, "skip probing for a device");
1087
1088 static unsigned int ide_nowerr;
1089
1090 module_param_call(nowerr, ide_set_dev_param_mask, NULL, &ide_nowerr, 0);
1091 MODULE_PARM_DESC(nowerr, "ignore the WRERR_STAT bit for a device");
1092
1093 static unsigned int ide_cdroms;
1094
1095 module_param_call(cdrom, ide_set_dev_param_mask, NULL, &ide_cdroms, 0);
1096 MODULE_PARM_DESC(cdrom, "force device as a CD-ROM");
1097
1098 struct chs_geom {
1099         unsigned int    cyl;
1100         u8              head;
1101         u8              sect;
1102 };
1103
1104 static unsigned int ide_disks;
1105 static struct chs_geom ide_disks_chs[MAX_HWIFS * MAX_DRIVES];
1106
1107 static int ide_set_disk_chs(const char *str, struct kernel_param *kp)
1108 {
1109         int a, b, c = 0, h = 0, s = 0, i, j = 1;
1110
1111         if (sscanf(str, "%d.%d:%d,%d,%d", &a, &b, &c, &h, &s) != 5 &&
1112             sscanf(str, "%d.%d:%d", &a, &b, &j) != 3)
1113                 return -EINVAL;
1114
1115         i = a * MAX_DRIVES + b;
1116
1117         if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1)
1118                 return -EINVAL;
1119
1120         if (c > INT_MAX || h > 255 || s > 255)
1121                 return -EINVAL;
1122
1123         if (j)
1124                 ide_disks |= (1 << i);
1125         else
1126                 ide_disks &= (1 << i);
1127
1128         ide_disks_chs[i].cyl  = c;
1129         ide_disks_chs[i].head = h;
1130         ide_disks_chs[i].sect = s;
1131
1132         return 0;
1133 }
1134
1135 module_param_call(chs, ide_set_disk_chs, NULL, NULL, 0);
1136 MODULE_PARM_DESC(chs, "force device as a disk (using CHS)");
1137
1138 static void ide_dev_apply_params(ide_drive_t *drive)
1139 {
1140         int i = drive->hwif->index * MAX_DRIVES + drive->select.b.unit;
1141
1142         if (ide_nodma & (1 << i)) {
1143                 printk(KERN_INFO "ide: disallowing DMA for %s\n", drive->name);
1144                 drive->nodma = 1;
1145         }
1146         if (ide_noflush & (1 << i)) {
1147                 printk(KERN_INFO "ide: disabling flush requests for %s\n",
1148                                  drive->name);
1149                 drive->noflush = 1;
1150         }
1151         if (ide_noprobe & (1 << i)) {
1152                 printk(KERN_INFO "ide: skipping probe for %s\n", drive->name);
1153                 drive->noprobe = 1;
1154         }
1155         if (ide_nowerr & (1 << i)) {
1156                 printk(KERN_INFO "ide: ignoring the WRERR_STAT bit for %s\n",
1157                                  drive->name);
1158                 drive->bad_wstat = BAD_R_STAT;
1159         }
1160         if (ide_cdroms & (1 << i)) {
1161                 printk(KERN_INFO "ide: forcing %s as a CD-ROM\n", drive->name);
1162                 drive->present = 1;
1163                 drive->media = ide_cdrom;
1164                 /* an ATAPI device ignores DRDY */
1165                 drive->ready_stat = 0;
1166         }
1167         if (ide_disks & (1 << i)) {
1168                 drive->cyl  = drive->bios_cyl  = ide_disks_chs[i].cyl;
1169                 drive->head = drive->bios_head = ide_disks_chs[i].head;
1170                 drive->sect = drive->bios_sect = ide_disks_chs[i].sect;
1171                 drive->forced_geom = 1;
1172                 printk(KERN_INFO "ide: forcing %s as a disk (%d/%d/%d)\n",
1173                                  drive->name,
1174                                  drive->cyl, drive->head, drive->sect);
1175                 drive->present = 1;
1176                 drive->media = ide_disk;
1177                 drive->ready_stat = READY_STAT;
1178         }
1179 }
1180
1181 static unsigned int ide_ignore_cable;
1182
1183 static int ide_set_ignore_cable(const char *s, struct kernel_param *kp)
1184 {
1185         int i, j = 1;
1186
1187         if (sscanf(s, "%d:%d", &i, &j) != 2 && sscanf(s, "%d", &i) != 1)
1188                 return -EINVAL;
1189
1190         if (i >= MAX_HWIFS || j < 0 || j > 1)
1191                 return -EINVAL;
1192
1193         if (j)
1194                 ide_ignore_cable |= (1 << i);
1195         else
1196                 ide_ignore_cable &= (1 << i);
1197
1198         return 0;
1199 }
1200
1201 module_param_call(ignore_cable, ide_set_ignore_cable, NULL, NULL, 0);
1202 MODULE_PARM_DESC(ignore_cable, "ignore cable detection");
1203
1204 void ide_port_apply_params(ide_hwif_t *hwif)
1205 {
1206         int i;
1207
1208         if (ide_ignore_cable & (1 << hwif->index)) {
1209                 printk(KERN_INFO "ide: ignoring cable detection for %s\n",
1210                                  hwif->name);
1211                 hwif->cbl = ATA_CBL_PATA40_SHORT;
1212         }
1213
1214         for (i = 0; i < MAX_DRIVES; i++)
1215                 ide_dev_apply_params(&hwif->drives[i]);
1216 }
1217
1218 /*
1219  * This is gets invoked once during initialization, to set *everything* up
1220  */
1221 static int __init ide_init(void)
1222 {
1223         int ret;
1224
1225         printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n");
1226
1227         ret = bus_register(&ide_bus_type);
1228         if (ret < 0) {
1229                 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1230                 return ret;
1231         }
1232
1233         ide_port_class = class_create(THIS_MODULE, "ide_port");
1234         if (IS_ERR(ide_port_class)) {
1235                 ret = PTR_ERR(ide_port_class);
1236                 goto out_port_class;
1237         }
1238
1239         init_ide_data();
1240
1241         proc_ide_create();
1242
1243         return 0;
1244
1245 out_port_class:
1246         bus_unregister(&ide_bus_type);
1247
1248         return ret;
1249 }
1250
1251 #ifdef MODULE
1252 static char *options = NULL;
1253 module_param(options, charp, 0);
1254 MODULE_LICENSE("GPL");
1255
1256 static void __init parse_options (char *line)
1257 {
1258         char *next = line;
1259
1260         if (line == NULL || !*line)
1261                 return;
1262         while ((line = next) != NULL) {
1263                 if ((next = strchr(line,' ')) != NULL)
1264                         *next++ = 0;
1265                 if (!ide_setup(line))
1266                         printk (KERN_INFO "Unknown option '%s'\n", line);
1267         }
1268 }
1269
1270 int __init init_module (void)
1271 {
1272         parse_options(options);
1273         return ide_init();
1274 }
1275
1276 void __exit cleanup_module (void)
1277 {
1278         proc_ide_destroy();
1279
1280         class_destroy(ide_port_class);
1281
1282         bus_unregister(&ide_bus_type);
1283 }
1284
1285 #else /* !MODULE */
1286
1287 __setup("", ide_setup);
1288
1289 module_init(ide_init);
1290
1291 #endif /* MODULE */