git.oblomov.eu 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 static int idebus_parameter;    /* holds the "idebus=" parameter */
  90 static int system_bus_speed;    /* holds what we think is VESA/PCI bus speed */
  91
  92 DEFINE_MUTEX(ide_cfg_mtx);
  93  __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
  94
  95 int noautodma = 0;
  96
  97 #ifdef CONFIG_BLK_DEV_IDEACPI
  98 int ide_noacpi = 0;
  99 int ide_noacpitfs = 1;
 100 int ide_noacpionboot = 1;
 101 #endif
 102
 103 ide_hwif_t ide_hwifs[MAX_HWIFS];        /* master data repository */
 104
 105 static void ide_port_init_devices_data(ide_hwif_t *);
 106
 107 /*
 108  * Do not even *think* about calling this!
 109  */
 110 void ide_init_port_data(ide_hwif_t *hwif, unsigned int index)
 111 {
 112         /* bulk initialize hwif & drive info with zeros */
 113         memset(hwif, 0, sizeof(ide_hwif_t));
 114
 115         /* fill in any non-zero initial values */
 116         hwif->index     = index;
 117         hwif->major     = ide_hwif_to_major[index];
 118
 119         hwif->name[0]   = 'i';
 120         hwif->name[1]   = 'd';
 121         hwif->name[2]   = 'e';
 122         hwif->name[3]   = '0' + index;
 123
 124         hwif->bus_state = BUSSTATE_ON;
 125
 126         init_completion(&hwif->gendev_rel_comp);
 127
 128         default_hwif_iops(hwif);
 129         default_hwif_transport(hwif);
 130
 131         ide_port_init_devices_data(hwif);
 132 }
 133 EXPORT_SYMBOL_GPL(ide_init_port_data);
 134
 135 static void ide_port_init_devices_data(ide_hwif_t *hwif)
 136 {
 137         int unit;
 138
 139         for (unit = 0; unit < MAX_DRIVES; ++unit) {
 140                 ide_drive_t *drive = &hwif->drives[unit];
 141                 u8 j = (hwif->index * MAX_DRIVES) + unit;
 142
 143                 memset(drive, 0, sizeof(*drive));
 144
 145                 drive->media                    = ide_disk;
 146                 drive->select.all               = (unit<<4)|0xa0;
 147                 drive->hwif                     = hwif;
 148                 drive->ctl                      = 0x08;
 149                 drive->ready_stat               = READY_STAT;
 150                 drive->bad_wstat                = BAD_W_STAT;
 151                 drive->special.b.recalibrate    = 1;
 152                 drive->special.b.set_geometry   = 1;
 153                 drive->name[0]                  = 'h';
 154                 drive->name[1]                  = 'd';
 155                 drive->name[2]                  = 'a' + j;
 156                 drive->max_failures             = IDE_DEFAULT_MAX_FAILURES;
 157
 158                 INIT_LIST_HEAD(&drive->list);
 159                 init_completion(&drive->gendev_rel_comp);
 160         }
 161 }
 162
 163 /*
 164  * init_ide_data() sets reasonable default values into all fields
 165  * of all instances of the hwifs and drives, but only on the first call.
 166  * Subsequent calls have no effect (they don't wipe out anything).
 167  *
 168  * This routine is normally called at driver initialization time,
 169  * but may also be called MUCH earlier during kernel "command-line"
 170  * parameter processing.  As such, we cannot depend on any other parts
 171  * of the kernel (such as memory allocation) to be functioning yet.
 172  *
 173  * This is too bad, as otherwise we could dynamically allocate the
 174  * ide_drive_t structs as needed, rather than always consuming memory
 175  * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
 176  *
 177  * FIXME: We should stuff the setup data into __init and copy the
 178  * relevant hwifs/allocate them properly during boot.
 179  */
 180 #define MAGIC_COOKIE 0x12345678
 181 static void __init init_ide_data (void)
 182 {
 183         unsigned int index;
 184         static unsigned long magic_cookie = MAGIC_COOKIE;
 185
 186         if (magic_cookie != MAGIC_COOKIE)
 187                 return;         /* already initialized */
 188         magic_cookie = 0;
 189
 190         /* Initialise all interface structures */
 191         for (index = 0; index < MAX_HWIFS; ++index) {
 192                 ide_hwif_t *hwif = &ide_hwifs[index];
 193
 194                 ide_init_port_data(hwif, index);
 195         }
 196 }
 197
 198 /**
 199  *      ide_system_bus_speed    -       guess bus speed
 200  *
 201  *      ide_system_bus_speed() returns what we think is the system VESA/PCI
 202  *      bus speed (in MHz). This is used for calculating interface PIO timings.
 203  *      The default is 40 for known PCI systems, 50 otherwise.
 204  *      The "idebus=xx" parameter can be used to override this value.
 205  *      The actual value to be used is computed/displayed the first time
 206  *      through. Drivers should only use this as a last resort.
 207  *
 208  *      Returns a guessed speed in MHz.
 209  */
 210
 211 static int ide_system_bus_speed(void)
 212 {
 213 #ifdef CONFIG_PCI
 214         static struct pci_device_id pci_default[] = {
 215                 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
 216                 { }
 217         };
 218 #else
 219 #define pci_default 0
 220 #endif /* CONFIG_PCI */
 221
 222         /* user supplied value */
 223         if (idebus_parameter)
 224                 return idebus_parameter;
 225
 226         /* safe default value for PCI or VESA and PCI*/
 227         return pci_dev_present(pci_default) ? 33 : 50;
 228 }
 229
 230 void ide_remove_port_from_hwgroup(ide_hwif_t *hwif)
 231 {
 232         ide_hwgroup_t *hwgroup = hwif->hwgroup;
 233
 234         spin_lock_irq(&ide_lock);
 235         /*
 236          * Remove us from the hwgroup, and free
 237          * the hwgroup if we were the only member
 238          */
 239         if (hwif->next == hwif) {
 240                 BUG_ON(hwgroup->hwif != hwif);
 241                 kfree(hwgroup);
 242         } else {
 243                 /* There is another interface in hwgroup.
 244                  * Unlink us, and set hwgroup->drive and ->hwif to
 245                  * something sane.
 246                  */
 247                 ide_hwif_t *g = hwgroup->hwif;
 248
 249                 while (g->next != hwif)
 250                         g = g->next;
 251                 g->next = hwif->next;
 252                 if (hwgroup->hwif == hwif) {
 253                         /* Chose a random hwif for hwgroup->hwif.
 254                          * It's guaranteed that there are no drives
 255                          * left in the hwgroup.
 256                          */
 257                         BUG_ON(hwgroup->drive != NULL);
 258                         hwgroup->hwif = g;
 259                 }
 260                 BUG_ON(hwgroup->hwif == hwif);
 261         }
 262         spin_unlock_irq(&ide_lock);
 263 }
 264
 265 /* Called with ide_lock held. */
 266 static void __ide_port_unregister_devices(ide_hwif_t *hwif)
 267 {
 268         int i;
 269
 270         for (i = 0; i < MAX_DRIVES; i++) {
 271                 ide_drive_t *drive = &hwif->drives[i];
 272
 273                 if (drive->present) {
 274                         spin_unlock_irq(&ide_lock);
 275                         device_unregister(&drive->gendev);
 276                         wait_for_completion(&drive->gendev_rel_comp);
 277                         spin_lock_irq(&ide_lock);
 278                 }
 279         }
 280 }
 281
 282 void ide_port_unregister_devices(ide_hwif_t *hwif)
 283 {
 284         mutex_lock(&ide_cfg_mtx);
 285         spin_lock_irq(&ide_lock);
 286         __ide_port_unregister_devices(hwif);
 287         hwif->present = 0;
 288         ide_port_init_devices_data(hwif);
 289         spin_unlock_irq(&ide_lock);
 290         mutex_unlock(&ide_cfg_mtx);
 291 }
 292 EXPORT_SYMBOL_GPL(ide_port_unregister_devices);
 293
 294 /**
 295  *      ide_unregister          -       free an IDE interface
 296  *      @index: index of interface (will change soon to a pointer)
 297  *
 298  *      Perform the final unregister of an IDE interface. At the moment
 299  *      we don't refcount interfaces so this will also get split up.
 300  *
 301  *      Locking:
 302  *      The caller must not hold the IDE locks
 303  *      The drive present/vanishing is not yet properly locked
 304  *      Take care with the callbacks. These have been split to avoid
 305  *      deadlocking the IDE layer. The shutdown callback is called
 306  *      before we take the lock and free resources. It is up to the
 307  *      caller to be sure there is no pending I/O here, and that
 308  *      the interface will not be reopened (present/vanishing locking
 309  *      isn't yet done BTW). After we commit to the final kill we
 310  *      call the cleanup callback with the ide locks held.
 311  *
 312  *      Unregister restores the hwif structures to the default state.
 313  *      This is raving bonkers.
 314  */
 315
 316 void ide_unregister(unsigned int index)
 317 {
 318         ide_hwif_t *hwif, *g;
 319         ide_hwgroup_t *hwgroup;
 320         int irq_count = 0;
 321
 322         BUG_ON(index >= MAX_HWIFS);
 323
 324         BUG_ON(in_interrupt());
 325         BUG_ON(irqs_disabled());
 326         mutex_lock(&ide_cfg_mtx);
 327         spin_lock_irq(&ide_lock);
 328         hwif = &ide_hwifs[index];
 329         if (!hwif->present)
 330                 goto abort;
 331         __ide_port_unregister_devices(hwif);
 332         hwif->present = 0;
 333
 334         spin_unlock_irq(&ide_lock);
 335
 336         ide_proc_unregister_port(hwif);
 337
 338         hwgroup = hwif->hwgroup;
 339         /*
 340          * free the irq if we were the only hwif using it
 341          */
 342         g = hwgroup->hwif;
 343         do {
 344                 if (g->irq == hwif->irq)
 345                         ++irq_count;
 346                 g = g->next;
 347         } while (g != hwgroup->hwif);
 348         if (irq_count == 1)
 349                 free_irq(hwif->irq, hwgroup);
 350
 351         ide_remove_port_from_hwgroup(hwif);
 352
 353         device_unregister(hwif->portdev);
 354         device_unregister(&hwif->gendev);
 355         wait_for_completion(&hwif->gendev_rel_comp);
 356
 357         /*
 358          * Remove us from the kernel's knowledge
 359          */
 360         blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
 361         kfree(hwif->sg_table);
 362         unregister_blkdev(hwif->major, hwif->name);
 363         spin_lock_irq(&ide_lock);
 364
 365         if (hwif->dma_base)
 366                 ide_release_dma_engine(hwif);
 367
 368         /* restore hwif data to pristine status */
 369         ide_init_port_data(hwif, index);
 370
 371 abort:
 372         spin_unlock_irq(&ide_lock);
 373         mutex_unlock(&ide_cfg_mtx);
 374 }
 375
 376 EXPORT_SYMBOL(ide_unregister);
 377
 378 void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw)
 379 {
 380         memcpy(hwif->io_ports, hw->io_ports, sizeof(hwif->io_ports));
 381         hwif->irq = hw->irq;
 382         hwif->chipset = hw->chipset;
 383         hwif->gendev.parent = hw->dev;
 384         hwif->ack_intr = hw->ack_intr;
 385 }
 386 EXPORT_SYMBOL_GPL(ide_init_port_hw);
 387
 388 /*
 389  *      Locks for IDE setting functionality
 390  */
 391
 392 DEFINE_MUTEX(ide_setting_mtx);
 393
 394 EXPORT_SYMBOL_GPL(ide_setting_mtx);
 395
 396 /**
 397  *      ide_spin_wait_hwgroup   -       wait for group
 398  *      @drive: drive in the group
 399  *
 400  *      Wait for an IDE device group to go non busy and then return
 401  *      holding the ide_lock which guards the hwgroup->busy status
 402  *      and right to use it.
 403  */
 404
 405 int ide_spin_wait_hwgroup (ide_drive_t *drive)
 406 {
 407         ide_hwgroup_t *hwgroup = HWGROUP(drive);
 408         unsigned long timeout = jiffies + (3 * HZ);
 409
 410         spin_lock_irq(&ide_lock);
 411
 412         while (hwgroup->busy) {
 413                 unsigned long lflags;
 414                 spin_unlock_irq(&ide_lock);
 415                 local_irq_set(lflags);
 416                 if (time_after(jiffies, timeout)) {
 417                         local_irq_restore(lflags);
 418                         printk(KERN_ERR "%s: channel busy\n", drive->name);
 419                         return -EBUSY;
 420                 }
 421                 local_irq_restore(lflags);
 422                 spin_lock_irq(&ide_lock);
 423         }
 424         return 0;
 425 }
 426
 427 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
 428
 429 int set_io_32bit(ide_drive_t *drive, int arg)
 430 {
 431         if (drive->no_io_32bit)
 432                 return -EPERM;
 433
 434         if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
 435                 return -EINVAL;
 436
 437         if (ide_spin_wait_hwgroup(drive))
 438                 return -EBUSY;
 439
 440         drive->io_32bit = arg;
 441
 442         spin_unlock_irq(&ide_lock);
 443
 444         return 0;
 445 }
 446
 447 static int set_ksettings(ide_drive_t *drive, int arg)
 448 {
 449         if (arg < 0 || arg > 1)
 450                 return -EINVAL;
 451
 452         if (ide_spin_wait_hwgroup(drive))
 453                 return -EBUSY;
 454         drive->keep_settings = arg;
 455         spin_unlock_irq(&ide_lock);
 456
 457         return 0;
 458 }
 459
 460 int set_using_dma(ide_drive_t *drive, int arg)
 461 {
 462 #ifdef CONFIG_BLK_DEV_IDEDMA
 463         ide_hwif_t *hwif = drive->hwif;
 464         int err = -EPERM;
 465
 466         if (arg < 0 || arg > 1)
 467                 return -EINVAL;
 468
 469         if (!drive->id || !(drive->id->capability & 1))
 470                 goto out;
 471
 472         if (hwif->dma_ops == NULL)
 473                 goto out;
 474
 475         err = -EBUSY;
 476         if (ide_spin_wait_hwgroup(drive))
 477                 goto out;
 478         /*
 479          * set ->busy flag, unlock and let it ride
 480          */
 481         hwif->hwgroup->busy = 1;
 482         spin_unlock_irq(&ide_lock);
 483
 484         err = 0;
 485
 486         if (arg) {
 487                 if (ide_set_dma(drive))
 488                         err = -EIO;
 489         } else
 490                 ide_dma_off(drive);
 491
 492         /*
 493          * lock, clear ->busy flag and unlock before leaving
 494          */
 495         spin_lock_irq(&ide_lock);
 496         hwif->hwgroup->busy = 0;
 497         spin_unlock_irq(&ide_lock);
 498 out:
 499         return err;
 500 #else
 501         if (arg < 0 || arg > 1)
 502                 return -EINVAL;
 503
 504         return -EPERM;
 505 #endif
 506 }
 507
 508 int set_pio_mode(ide_drive_t *drive, int arg)
 509 {
 510         struct request rq;
 511         ide_hwif_t *hwif = drive->hwif;
 512         const struct ide_port_ops *port_ops = hwif->port_ops;
 513
 514         if (arg < 0 || arg > 255)
 515                 return -EINVAL;
 516
 517         if (port_ops == NULL || port_ops->set_pio_mode == NULL ||
 518             (hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
 519                 return -ENOSYS;
 520
 521         if (drive->special.b.set_tune)
 522                 return -EBUSY;
 523
 524         ide_init_drive_cmd(&rq);
 525         rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
 526
 527         drive->tune_req = (u8) arg;
 528         drive->special.b.set_tune = 1;
 529         (void) ide_do_drive_cmd(drive, &rq, ide_wait);
 530         return 0;
 531 }
 532
 533 static int set_unmaskirq(ide_drive_t *drive, int arg)
 534 {
 535         if (drive->no_unmask)
 536                 return -EPERM;
 537
 538         if (arg < 0 || arg > 1)
 539                 return -EINVAL;
 540
 541         if (ide_spin_wait_hwgroup(drive))
 542                 return -EBUSY;
 543         drive->unmask = arg;
 544         spin_unlock_irq(&ide_lock);
 545
 546         return 0;
 547 }
 548
 549 /**
 550  *      system_bus_clock        -       clock guess
 551  *
 552  *      External version of the bus clock guess used by very old IDE drivers
 553  *      for things like VLB timings. Should not be used.
 554  */
 555
 556 int system_bus_clock (void)
 557 {
 558         return system_bus_speed;
 559 }
 560
 561 EXPORT_SYMBOL(system_bus_clock);
 562
 563 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
 564 {
 565         ide_drive_t *drive = dev->driver_data;
 566         ide_hwif_t *hwif = HWIF(drive);
 567         struct request rq;
 568         struct request_pm_state rqpm;
 569         ide_task_t args;
 570         int ret;
 571
 572         /* Call ACPI _GTM only once */
 573         if (!(drive->dn % 2))
 574                 ide_acpi_get_timing(hwif);
 575
 576         memset(&rq, 0, sizeof(rq));
 577         memset(&rqpm, 0, sizeof(rqpm));
 578         memset(&args, 0, sizeof(args));
 579         rq.cmd_type = REQ_TYPE_PM_SUSPEND;
 580         rq.special = &args;
 581         rq.data = &rqpm;
 582         rqpm.pm_step = ide_pm_state_start_suspend;
 583         if (mesg.event == PM_EVENT_PRETHAW)
 584                 mesg.event = PM_EVENT_FREEZE;
 585         rqpm.pm_state = mesg.event;
 586
 587         ret = ide_do_drive_cmd(drive, &rq, ide_wait);
 588         /* only call ACPI _PS3 after both drivers are suspended */
 589         if (!ret && (((drive->dn % 2) && hwif->drives[0].present
 590                  && hwif->drives[1].present)
 591                  || !hwif->drives[0].present
 592                  || !hwif->drives[1].present))
 593                 ide_acpi_set_state(hwif, 0);
 594         return ret;
 595 }
 596
 597 static int generic_ide_resume(struct device *dev)
 598 {
 599         ide_drive_t *drive = dev->driver_data;
 600         ide_hwif_t *hwif = HWIF(drive);
 601         struct request rq;
 602         struct request_pm_state rqpm;
 603         ide_task_t args;
 604         int err;
 605
 606         /* Call ACPI _STM only once */
 607         if (!(drive->dn % 2)) {
 608                 ide_acpi_set_state(hwif, 1);
 609                 ide_acpi_push_timing(hwif);
 610         }
 611
 612         ide_acpi_exec_tfs(drive);
 613
 614         memset(&rq, 0, sizeof(rq));
 615         memset(&rqpm, 0, sizeof(rqpm));
 616         memset(&args, 0, sizeof(args));
 617         rq.cmd_type = REQ_TYPE_PM_RESUME;
 618         rq.special = &args;
 619         rq.data = &rqpm;
 620         rqpm.pm_step = ide_pm_state_start_resume;
 621         rqpm.pm_state = PM_EVENT_ON;
 622
 623         err = ide_do_drive_cmd(drive, &rq, ide_head_wait);
 624
 625         if (err == 0 && dev->driver) {
 626                 ide_driver_t *drv = to_ide_driver(dev->driver);
 627
 628                 if (drv->resume)
 629                         drv->resume(drive);
 630         }
 631
 632         return err;
 633 }
 634
 635 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
 636                         unsigned int cmd, unsigned long arg)
 637 {
 638         unsigned long flags;
 639         ide_driver_t *drv;
 640         void __user *p = (void __user *)arg;
 641         int err = 0, (*setfunc)(ide_drive_t *, int);
 642         u8 *val;
 643
 644         switch (cmd) {
 645         case HDIO_GET_32BIT:        val = &drive->io_32bit;      goto read_val;
 646         case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
 647         case HDIO_GET_UNMASKINTR:   val = &drive->unmask;        goto read_val;
 648         case HDIO_GET_DMA:          val = &drive->using_dma;     goto read_val;
 649         case HDIO_SET_32BIT:        setfunc = set_io_32bit;      goto set_val;
 650         case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings;     goto set_val;
 651         case HDIO_SET_PIO_MODE:     setfunc = set_pio_mode;      goto set_val;
 652         case HDIO_SET_UNMASKINTR:   setfunc = set_unmaskirq;     goto set_val;
 653         case HDIO_SET_DMA:          setfunc = set_using_dma;     goto set_val;
 654         }
 655
 656         switch (cmd) {
 657                 case HDIO_OBSOLETE_IDENTITY:
 658                 case HDIO_GET_IDENTITY:
 659                         if (bdev != bdev->bd_contains)
 660                                 return -EINVAL;
 661                         if (drive->id_read == 0)
 662                                 return -ENOMSG;
 663                         if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
 664                                 return -EFAULT;
 665                         return 0;
 666
 667                 case HDIO_GET_NICE:
 668                         return put_user(drive->dsc_overlap      <<      IDE_NICE_DSC_OVERLAP    |
 669                                         drive->atapi_overlap    <<      IDE_NICE_ATAPI_OVERLAP  |
 670                                         drive->nice1 << IDE_NICE_1,
 671                                         (long __user *) arg);
 672 #ifdef CONFIG_IDE_TASK_IOCTL
 673                 case HDIO_DRIVE_TASKFILE:
 674                         if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
 675                                 return -EACCES;
 676                         switch(drive->media) {
 677                                 case ide_disk:
 678                                         return ide_taskfile_ioctl(drive, cmd, arg);
 679                                 default:
 680                                         return -ENOMSG;
 681                         }
 682 #endif /* CONFIG_IDE_TASK_IOCTL */
 683
 684                 case HDIO_DRIVE_CMD:
 685                         if (!capable(CAP_SYS_RAWIO))
 686                                 return -EACCES;
 687                         return ide_cmd_ioctl(drive, cmd, arg);
 688
 689                 case HDIO_DRIVE_TASK:
 690                         if (!capable(CAP_SYS_RAWIO))
 691                                 return -EACCES;
 692                         return ide_task_ioctl(drive, cmd, arg);
 693                 case HDIO_SET_NICE:
 694                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
 695                         if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
 696                                 return -EPERM;
 697                         drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
 698                         drv = *(ide_driver_t **)bdev->bd_disk->private_data;
 699                         if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
 700                                 drive->dsc_overlap = 0;
 701                                 return -EPERM;
 702                         }
 703                         drive->nice1 = (arg >> IDE_NICE_1) & 1;
 704                         return 0;
 705                 case HDIO_DRIVE_RESET:
 706                         if (!capable(CAP_SYS_ADMIN))
 707                                 return -EACCES;
 708
 709                         /*
 710                          *      Abort the current command on the
 711                          *      group if there is one, taking
 712                          *      care not to allow anything else
 713                          *      to be queued and to die on the
 714                          *      spot if we miss one somehow
 715                          */
 716
 717                         spin_lock_irqsave(&ide_lock, flags);
 718
 719                         if (HWGROUP(drive)->resetting) {
 720                                 spin_unlock_irqrestore(&ide_lock, flags);
 721                                 return -EBUSY;
 722                         }
 723
 724                         ide_abort(drive, "drive reset");
 725
 726                         BUG_ON(HWGROUP(drive)->handler);
 727
 728                         /* Ensure nothing gets queued after we
 729                            drop the lock. Reset will clear the busy */
 730
 731                         HWGROUP(drive)->busy = 1;
 732                         spin_unlock_irqrestore(&ide_lock, flags);
 733                         (void) ide_do_reset(drive);
 734
 735                         return 0;
 736                 case HDIO_GET_BUSSTATE:
 737                         if (!capable(CAP_SYS_ADMIN))
 738                                 return -EACCES;
 739                         if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
 740                                 return -EFAULT;
 741                         return 0;
 742
 743                 case HDIO_SET_BUSSTATE:
 744                         if (!capable(CAP_SYS_ADMIN))
 745                                 return -EACCES;
 746                         return -EOPNOTSUPP;
 747                 default:
 748                         return -EINVAL;
 749         }
 750
 751 read_val:
 752         mutex_lock(&ide_setting_mtx);
 753         spin_lock_irqsave(&ide_lock, flags);
 754         err = *val;
 755         spin_unlock_irqrestore(&ide_lock, flags);
 756         mutex_unlock(&ide_setting_mtx);
 757         return err >= 0 ? put_user(err, (long __user *)arg) : err;
 758
 759 set_val:
 760         if (bdev != bdev->bd_contains)
 761                 err = -EINVAL;
 762         else {
 763                 if (!capable(CAP_SYS_ADMIN))
 764                         err = -EACCES;
 765                 else {
 766                         mutex_lock(&ide_setting_mtx);
 767                         err = setfunc(drive, arg);
 768                         mutex_unlock(&ide_setting_mtx);
 769                 }
 770         }
 771         return err;
 772 }
 773
 774 EXPORT_SYMBOL(generic_ide_ioctl);
 775
 776 /*
 777  * stridx() returns the offset of c within s,
 778  * or -1 if c is '\0' or not found within s.
 779  */
 780 static int __init stridx (const char *s, char c)
 781 {
 782         char *i = strchr(s, c);
 783         return (i && c) ? i - s : -1;
 784 }
 785
 786 /*
 787  * match_parm() does parsing for ide_setup():
 788  *
 789  * 1. the first char of s must be '='.
 790  * 2. if the remainder matches one of the supplied keywords,
 791  *     the index (1 based) of the keyword is negated and returned.
 792  * 3. if the remainder is a series of no more than max_vals numbers
 793  *     separated by commas, the numbers are saved in vals[] and a
 794  *     count of how many were saved is returned.  Base10 is assumed,
 795  *     and base16 is allowed when prefixed with "0x".
 796  * 4. otherwise, zero is returned.
 797  */
 798 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
 799 {
 800         static const char *decimal = "0123456789";
 801         static const char *hex = "0123456789abcdef";
 802         int i, n;
 803
 804         if (*s++ == '=') {
 805                 /*
 806                  * Try matching against the supplied keywords,
 807                  * and return -(index+1) if we match one
 808                  */
 809                 if (keywords != NULL) {
 810                         for (i = 0; *keywords != NULL; ++i) {
 811                                 if (!strcmp(s, *keywords++))
 812                                         return -(i+1);
 813                         }
 814                 }
 815                 /*
 816                  * Look for a series of no more than "max_vals"
 817                  * numeric values separated by commas, in base10,
 818                  * or base16 when prefixed with "0x".
 819                  * Return a count of how many were found.
 820                  */
 821                 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
 822                         vals[n] = i;
 823                         while ((i = stridx(decimal, *++s)) >= 0)
 824                                 vals[n] = (vals[n] * 10) + i;
 825                         if (*s == 'x' && !vals[n]) {
 826                                 while ((i = stridx(hex, *++s)) >= 0)
 827                                         vals[n] = (vals[n] * 0x10) + i;
 828                         }
 829                         if (++n == max_vals)
 830                                 break;
 831                         if (*s == ',' || *s == ';')
 832                                 ++s;
 833                 }
 834                 if (!*s)
 835                         return n;
 836         }
 837         return 0;       /* zero = nothing matched */
 838 }
 839
 840 extern int probe_ali14xx;
 841 extern int probe_umc8672;
 842 extern int probe_dtc2278;
 843 extern int probe_ht6560b;
 844 extern int probe_qd65xx;
 845 extern int cmd640_vlb;
 846 extern int probe_4drives;
 847
 848 static int __initdata is_chipset_set;
 849
 850 /*
 851  * ide_setup() gets called VERY EARLY during initialization,
 852  * to handle kernel "command line" strings beginning with "hdx=" or "ide".
 853  *
 854  * Remember to update Documentation/ide/ide.txt if you change something here.
 855  */
 856 static int __init ide_setup(char *s)
 857 {
 858         int i, vals[3];
 859         ide_hwif_t *hwif;
 860         ide_drive_t *drive;
 861         unsigned int hw, unit;
 862         const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
 863         const char max_hwif  = '0' + (MAX_HWIFS - 1);
 864
 865
 866         if (strncmp(s,"hd",2) == 0 && s[2] == '=')      /* hd= is for hd.c   */
 867                 return 0;                               /* driver and not us */
 868
 869         if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
 870                 return 0;
 871
 872         printk(KERN_INFO "ide_setup: %s", s);
 873         init_ide_data ();
 874
 875 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
 876         if (!strcmp(s, "ide=doubler")) {
 877                 extern int ide_doubler;
 878
 879                 printk(" : Enabled support for IDE doublers\n");
 880                 ide_doubler = 1;
 881                 return 1;
 882         }
 883 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
 884
 885         if (!strcmp(s, "ide=nodma")) {
 886                 printk(" : Prevented DMA\n");
 887                 noautodma = 1;
 888                 goto obsolete_option;
 889         }
 890
 891 #ifdef CONFIG_BLK_DEV_IDEACPI
 892         if (!strcmp(s, "ide=noacpi")) {
 893                 //printk(" : Disable IDE ACPI support.\n");
 894                 ide_noacpi = 1;
 895                 return 1;
 896         }
 897         if (!strcmp(s, "ide=acpigtf")) {
 898                 //printk(" : Enable IDE ACPI _GTF support.\n");
 899                 ide_noacpitfs = 0;
 900                 return 1;
 901         }
 902         if (!strcmp(s, "ide=acpionboot")) {
 903                 //printk(" : Call IDE ACPI methods on boot.\n");
 904                 ide_noacpionboot = 0;
 905                 return 1;
 906         }
 907 #endif /* CONFIG_BLK_DEV_IDEACPI */
 908
 909         /*
 910          * Look for drive options:  "hdx="
 911          */
 912         if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
 913                 const char *hd_words[] = {
 914                         "none", "noprobe", "nowerr", "cdrom", "nodma",
 915                         "autotune", "noautotune", "-8", "-9", "-10",
 916                         "noflush", "remap", "remap63", "scsi", NULL };
 917                 unit = s[2] - 'a';
 918                 hw   = unit / MAX_DRIVES;
 919                 unit = unit % MAX_DRIVES;
 920                 hwif = &ide_hwifs[hw];
 921                 drive = &hwif->drives[unit];
 922                 if (strncmp(s + 4, "ide-", 4) == 0) {
 923                         strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
 924                         goto obsolete_option;
 925                 }
 926                 switch (match_parm(&s[3], hd_words, vals, 3)) {
 927                         case -1: /* "none" */
 928                         case -2: /* "noprobe" */
 929                                 drive->noprobe = 1;
 930                                 goto done;
 931                         case -3: /* "nowerr" */
 932                                 drive->bad_wstat = BAD_R_STAT;
 933                                 goto done;
 934                         case -4: /* "cdrom" */
 935                                 drive->present = 1;
 936                                 drive->media = ide_cdrom;
 937                                 /* an ATAPI device ignores DRDY */
 938                                 drive->ready_stat = 0;
 939                                 goto done;
 940                         case -5: /* nodma */
 941                                 drive->nodma = 1;
 942                                 goto done;
 943                         case -6: /* "autotune" */
 944                                 drive->autotune = IDE_TUNE_AUTO;
 945                                 goto obsolete_option;
 946                         case -7: /* "noautotune" */
 947                                 drive->autotune = IDE_TUNE_NOAUTO;
 948                                 goto obsolete_option;
 949                         case -11: /* noflush */
 950                                 drive->noflush = 1;
 951                                 goto done;
 952                         case -12: /* "remap" */
 953                                 drive->remap_0_to_1 = 1;
 954                                 goto obsolete_option;
 955                         case -13: /* "remap63" */
 956                                 drive->sect0 = 63;
 957                                 goto obsolete_option;
 958                         case -14: /* "scsi" */
 959                                 drive->scsi = 1;
 960                                 goto obsolete_option;
 961                         case 3: /* cyl,head,sect */
 962                                 drive->media    = ide_disk;
 963                                 drive->ready_stat = READY_STAT;
 964                                 drive->cyl      = drive->bios_cyl  = vals[0];
 965                                 drive->head     = drive->bios_head = vals[1];
 966                                 drive->sect     = drive->bios_sect = vals[2];
 967                                 drive->present  = 1;
 968                                 drive->forced_geom = 1;
 969                                 goto done;
 970                         default:
 971                                 goto bad_option;
 972                 }
 973         }
 974
 975         if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
 976                 goto bad_option;
 977         /*
 978          * Look for bus speed option:  "idebus="
 979          */
 980         if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
 981                 if (match_parm(&s[6], NULL, vals, 1) != 1)
 982                         goto bad_option;
 983                 if (vals[0] >= 20 && vals[0] <= 66) {
 984                         idebus_parameter = vals[0];
 985                 } else
 986                         printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
 987                 goto done;
 988         }
 989         /*
 990          * Look for interface options:  "idex="
 991          */
 992         if (s[3] >= '0' && s[3] <= max_hwif) {
 993                 /*
 994                  * Be VERY CAREFUL changing this: note hardcoded indexes below
 995                  * (-8, -9, -10) are reserved to ease the hardcoding.
 996                  */
 997                 static const char *ide_words[] = {
 998                         "minus1", "serialize", "minus3", "minus4",
 999                         "reset", "minus6", "ata66", "minus8", "minus9",
1000                         "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1001                         "dtc2278", "umc8672", "ali14xx", NULL };
1002
1003                 hw = s[3] - '0';
1004                 hwif = &ide_hwifs[hw];
1005                 i = match_parm(&s[4], ide_words, vals, 3);
1006
1007                 /*
1008                  * Cryptic check to ensure chipset not already set for hwif.
1009                  * Note: we can't depend on hwif->chipset here.
1010                  */
1011                 if (i >= -18 && i <= -11) {
1012                         /* chipset already specified */
1013                         if (is_chipset_set)
1014                                 goto bad_option;
1015                         /* these drivers are for "ide0=" only */
1016                         if (hw != 0)
1017                                 goto bad_hwif;
1018                         is_chipset_set = 1;
1019                         printk("\n");
1020                 }
1021
1022                 switch (i) {
1023 #ifdef CONFIG_BLK_DEV_ALI14XX
1024                         case -17: /* "ali14xx" */
1025                                 probe_ali14xx = 1;
1026                                 goto obsolete_option;
1027 #endif
1028 #ifdef CONFIG_BLK_DEV_UMC8672
1029                         case -16: /* "umc8672" */
1030                                 probe_umc8672 = 1;
1031                                 goto obsolete_option;
1032 #endif
1033 #ifdef CONFIG_BLK_DEV_DTC2278
1034                         case -15: /* "dtc2278" */
1035                                 probe_dtc2278 = 1;
1036                                 goto obsolete_option;
1037 #endif
1038 #ifdef CONFIG_BLK_DEV_CMD640
1039                         case -14: /* "cmd640_vlb" */
1040                                 cmd640_vlb = 1;
1041                                 goto obsolete_option;
1042 #endif
1043 #ifdef CONFIG_BLK_DEV_HT6560B
1044                         case -13: /* "ht6560b" */
1045                                 probe_ht6560b = 1;
1046                                 goto obsolete_option;
1047 #endif
1048 #ifdef CONFIG_BLK_DEV_QD65XX
1049                         case -12: /* "qd65xx" */
1050                                 probe_qd65xx = 1;
1051                                 goto obsolete_option;
1052 #endif
1053 #ifdef CONFIG_BLK_DEV_4DRIVES
1054                         case -11: /* "four" drives on one set of ports */
1055                                 probe_4drives = 1;
1056                                 goto obsolete_option;
1057 #endif
1058                         case -10: /* minus10 */
1059                         case -9: /* minus9 */
1060                         case -8: /* minus8 */
1061                         case -6:
1062                         case -4:
1063                         case -3:
1064                                 goto bad_option;
1065                         case -7: /* ata66 */
1066 #ifdef CONFIG_BLK_DEV_IDEPCI
1067                                 /*
1068                                  * Use ATA_CBL_PATA40_SHORT so drive side
1069                                  * cable detection is also overriden.
1070                                  */
1071                                 hwif->cbl = ATA_CBL_PATA40_SHORT;
1072                                 goto obsolete_option;
1073 #else
1074                                 goto bad_hwif;
1075 #endif
1076                         case -5: /* "reset" */
1077                                 hwif->reset = 1;
1078                                 goto obsolete_option;
1079                         case -2: /* "serialize" */
1080                                 hwif->mate = &ide_hwifs[hw^1];
1081                                 hwif->mate->mate = hwif;
1082                                 hwif->serialized = hwif->mate->serialized = 1;
1083                                 goto obsolete_option;
1084
1085                         case -1:
1086                         case 0:
1087                         case 1:
1088                         case 2:
1089                         case 3:
1090                                 goto bad_option;
1091                         default:
1092                                 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1093                                 return 1;
1094                 }
1095         }
1096 bad_option:
1097         printk(" -- BAD OPTION\n");
1098         return 1;
1099 obsolete_option:
1100         printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1101         return 1;
1102 bad_hwif:
1103         printk("-- NOT SUPPORTED ON ide%d", hw);
1104 done:
1105         printk("\n");
1106         return 1;
1107 }
1108
1109 EXPORT_SYMBOL(ide_lock);
1110
1111 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1112 {
1113         return 1;
1114 }
1115
1116 static char *media_string(ide_drive_t *drive)
1117 {
1118         switch (drive->media) {
1119         case ide_disk:
1120                 return "disk";
1121         case ide_cdrom:
1122                 return "cdrom";
1123         case ide_tape:
1124                 return "tape";
1125         case ide_floppy:
1126                 return "floppy";
1127         case ide_optical:
1128                 return "optical";
1129         default:
1130                 return "UNKNOWN";
1131         }
1132 }
1133
1134 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1135 {
1136         ide_drive_t *drive = to_ide_device(dev);
1137         return sprintf(buf, "%s\n", media_string(drive));
1138 }
1139
1140 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1141 {
1142         ide_drive_t *drive = to_ide_device(dev);
1143         return sprintf(buf, "%s\n", drive->name);
1144 }
1145
1146 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1147 {
1148         ide_drive_t *drive = to_ide_device(dev);
1149         return sprintf(buf, "ide:m-%s\n", media_string(drive));
1150 }
1151
1152 static ssize_t model_show(struct device *dev, struct device_attribute *attr,
1153                           char *buf)
1154 {
1155         ide_drive_t *drive = to_ide_device(dev);
1156         return sprintf(buf, "%s\n", drive->id->model);
1157 }
1158
1159 static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
1160                              char *buf)
1161 {
1162         ide_drive_t *drive = to_ide_device(dev);
1163         return sprintf(buf, "%s\n", drive->id->fw_rev);
1164 }
1165
1166 static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
1167                            char *buf)
1168 {
1169         ide_drive_t *drive = to_ide_device(dev);
1170         return sprintf(buf, "%s\n", drive->id->serial_no);
1171 }
1172
1173 static struct device_attribute ide_dev_attrs[] = {
1174         __ATTR_RO(media),
1175         __ATTR_RO(drivename),
1176         __ATTR_RO(modalias),
1177         __ATTR_RO(model),
1178         __ATTR_RO(firmware),
1179         __ATTR(serial, 0400, serial_show, NULL),
1180         __ATTR_NULL
1181 };
1182
1183 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
1184 {
1185         ide_drive_t *drive = to_ide_device(dev);
1186
1187         add_uevent_var(env, "MEDIA=%s", media_string(drive));
1188         add_uevent_var(env, "DRIVENAME=%s", drive->name);
1189         add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
1190         return 0;
1191 }
1192
1193 static int generic_ide_probe(struct device *dev)
1194 {
1195         ide_drive_t *drive = to_ide_device(dev);
1196         ide_driver_t *drv = to_ide_driver(dev->driver);
1197
1198         return drv->probe ? drv->probe(drive) : -ENODEV;
1199 }
1200
1201 static int generic_ide_remove(struct device *dev)
1202 {
1203         ide_drive_t *drive = to_ide_device(dev);
1204         ide_driver_t *drv = to_ide_driver(dev->driver);
1205
1206         if (drv->remove)
1207                 drv->remove(drive);
1208
1209         return 0;
1210 }
1211
1212 static void generic_ide_shutdown(struct device *dev)
1213 {
1214         ide_drive_t *drive = to_ide_device(dev);
1215         ide_driver_t *drv = to_ide_driver(dev->driver);
1216
1217         if (dev->driver && drv->shutdown)
1218                 drv->shutdown(drive);
1219 }
1220
1221 struct bus_type ide_bus_type = {
1222         .name           = "ide",
1223         .match          = ide_bus_match,
1224         .uevent         = ide_uevent,
1225         .probe          = generic_ide_probe,
1226         .remove         = generic_ide_remove,
1227         .shutdown       = generic_ide_shutdown,
1228         .dev_attrs      = ide_dev_attrs,
1229         .suspend        = generic_ide_suspend,
1230         .resume         = generic_ide_resume,
1231 };
1232
1233 EXPORT_SYMBOL_GPL(ide_bus_type);
1234
1235 static void ide_port_class_release(struct device *portdev)
1236 {
1237         ide_hwif_t *hwif = dev_get_drvdata(portdev);
1238
1239         put_device(&hwif->gendev);
1240 }
1241
1242 /*
1243  * This is gets invoked once during initialization, to set *everything* up
1244  */
1245 static int __init ide_init(void)
1246 {
1247         int ret;
1248
1249         printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n");
1250         system_bus_speed = ide_system_bus_speed();
1251
1252         printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
1253                          "for PIO modes%s\n", system_bus_speed,
1254                         idebus_parameter ? "" : "; override with idebus=xx");
1255
1256         ret = bus_register(&ide_bus_type);
1257         if (ret < 0) {
1258                 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1259                 return ret;
1260         }
1261
1262         ide_port_class = class_create(THIS_MODULE, "ide_port");
1263         if (IS_ERR(ide_port_class)) {
1264                 ret = PTR_ERR(ide_port_class);
1265                 goto out_port_class;
1266         }
1267         ide_port_class->dev_release = ide_port_class_release;
1268
1269         init_ide_data();
1270
1271         proc_ide_create();
1272
1273         return 0;
1274
1275 out_port_class:
1276         bus_unregister(&ide_bus_type);
1277
1278         return ret;
1279 }
1280
1281 #ifdef MODULE
1282 static char *options = NULL;
1283 module_param(options, charp, 0);
1284 MODULE_LICENSE("GPL");
1285
1286 static void __init parse_options (char *line)
1287 {
1288         char *next = line;
1289
1290         if (line == NULL || !*line)
1291                 return;
1292         while ((line = next) != NULL) {
1293                 if ((next = strchr(line,' ')) != NULL)
1294                         *next++ = 0;
1295                 if (!ide_setup(line))
1296                         printk (KERN_INFO "Unknown option '%s'\n", line);
1297         }
1298 }
1299
1300 int __init init_module (void)
1301 {
1302         parse_options(options);
1303         return ide_init();
1304 }
1305
1306 void __exit cleanup_module (void)
1307 {
1308         int index;
1309
1310         for (index = 0; index < MAX_HWIFS; ++index)
1311                 ide_unregister(index);
1312
1313         proc_ide_destroy();
1314
1315         class_destroy(ide_port_class);
1316
1317         bus_unregister(&ide_bus_type);
1318 }
1319
1320 #else /* !MODULE */
1321
1322 __setup("", ide_setup);
1323
1324 module_init(ide_init);
1325
1326 #endif /* MODULE */