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 static struct resource* hwif_request_region(ide_hwif_t *hwif,
 231                                             unsigned long addr, int num)
 232 {
 233         struct resource *res = request_region(addr, num, hwif->name);
 234
 235         if (!res)
 236                 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
 237                                 hwif->name, addr, addr+num-1);
 238         return res;
 239 }
 240
 241 /**
 242  *      ide_hwif_request_regions - request resources for IDE
 243  *      @hwif: interface to use
 244  *
 245  *      Requests all the needed resources for an interface.
 246  *      Right now core IDE code does this work which is deeply wrong.
 247  *      MMIO leaves it to the controller driver,
 248  *      PIO will migrate this way over time.
 249  */
 250
 251 int ide_hwif_request_regions(ide_hwif_t *hwif)
 252 {
 253         unsigned long addr;
 254
 255         if (hwif->mmio)
 256                 return 0;
 257
 258         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
 259
 260         if (addr && !hwif_request_region(hwif, addr, 1))
 261                 goto control_region_busy;
 262
 263         addr = hwif->io_ports[IDE_DATA_OFFSET];
 264         BUG_ON((addr | 7) != hwif->io_ports[IDE_STATUS_OFFSET]);
 265
 266         if (!hwif_request_region(hwif, addr, 8))
 267                 goto data_region_busy;
 268
 269         return 0;
 270
 271 data_region_busy:
 272         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
 273         if (addr)
 274                 release_region(addr, 1);
 275 control_region_busy:
 276         /* If any errors are return, we drop the hwif interface. */
 277         return -EBUSY;
 278 }
 279
 280 /**
 281  *      ide_hwif_release_regions - free IDE resources
 282  *
 283  *      Note that we only release the standard ports,
 284  *      and do not even try to handle any extra ports
 285  *      allocated for weird IDE interface chipsets.
 286  *
 287  *      Note also that we don't yet handle mmio resources here. More
 288  *      importantly our caller should be doing this so we need to
 289  *      restructure this as a helper function for drivers.
 290  */
 291
 292 void ide_hwif_release_regions(ide_hwif_t *hwif)
 293 {
 294         if (hwif->mmio)
 295                 return;
 296
 297         if (hwif->io_ports[IDE_CONTROL_OFFSET])
 298                 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
 299
 300         release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
 301 }
 302
 303 void ide_remove_port_from_hwgroup(ide_hwif_t *hwif)
 304 {
 305         ide_hwgroup_t *hwgroup = hwif->hwgroup;
 306
 307         spin_lock_irq(&ide_lock);
 308         /*
 309          * Remove us from the hwgroup, and free
 310          * the hwgroup if we were the only member
 311          */
 312         if (hwif->next == hwif) {
 313                 BUG_ON(hwgroup->hwif != hwif);
 314                 kfree(hwgroup);
 315         } else {
 316                 /* There is another interface in hwgroup.
 317                  * Unlink us, and set hwgroup->drive and ->hwif to
 318                  * something sane.
 319                  */
 320                 ide_hwif_t *g = hwgroup->hwif;
 321
 322                 while (g->next != hwif)
 323                         g = g->next;
 324                 g->next = hwif->next;
 325                 if (hwgroup->hwif == hwif) {
 326                         /* Chose a random hwif for hwgroup->hwif.
 327                          * It's guaranteed that there are no drives
 328                          * left in the hwgroup.
 329                          */
 330                         BUG_ON(hwgroup->drive != NULL);
 331                         hwgroup->hwif = g;
 332                 }
 333                 BUG_ON(hwgroup->hwif == hwif);
 334         }
 335         spin_unlock_irq(&ide_lock);
 336 }
 337
 338 /* Called with ide_lock held. */
 339 static void __ide_port_unregister_devices(ide_hwif_t *hwif)
 340 {
 341         int i;
 342
 343         for (i = 0; i < MAX_DRIVES; i++) {
 344                 ide_drive_t *drive = &hwif->drives[i];
 345
 346                 if (drive->present) {
 347                         spin_unlock_irq(&ide_lock);
 348                         device_unregister(&drive->gendev);
 349                         wait_for_completion(&drive->gendev_rel_comp);
 350                         spin_lock_irq(&ide_lock);
 351                 }
 352         }
 353 }
 354
 355 void ide_port_unregister_devices(ide_hwif_t *hwif)
 356 {
 357         mutex_lock(&ide_cfg_mtx);
 358         spin_lock_irq(&ide_lock);
 359         __ide_port_unregister_devices(hwif);
 360         hwif->present = 0;
 361         ide_port_init_devices_data(hwif);
 362         spin_unlock_irq(&ide_lock);
 363         mutex_unlock(&ide_cfg_mtx);
 364 }
 365 EXPORT_SYMBOL_GPL(ide_port_unregister_devices);
 366
 367 /**
 368  *      ide_unregister          -       free an IDE interface
 369  *      @index: index of interface (will change soon to a pointer)
 370  *
 371  *      Perform the final unregister of an IDE interface. At the moment
 372  *      we don't refcount interfaces so this will also get split up.
 373  *
 374  *      Locking:
 375  *      The caller must not hold the IDE locks
 376  *      The drive present/vanishing is not yet properly locked
 377  *      Take care with the callbacks. These have been split to avoid
 378  *      deadlocking the IDE layer. The shutdown callback is called
 379  *      before we take the lock and free resources. It is up to the
 380  *      caller to be sure there is no pending I/O here, and that
 381  *      the interface will not be reopened (present/vanishing locking
 382  *      isn't yet done BTW). After we commit to the final kill we
 383  *      call the cleanup callback with the ide locks held.
 384  *
 385  *      Unregister restores the hwif structures to the default state.
 386  *      This is raving bonkers.
 387  */
 388
 389 void ide_unregister(unsigned int index)
 390 {
 391         ide_hwif_t *hwif, *g;
 392         ide_hwgroup_t *hwgroup;
 393         int irq_count = 0;
 394
 395         BUG_ON(index >= MAX_HWIFS);
 396
 397         BUG_ON(in_interrupt());
 398         BUG_ON(irqs_disabled());
 399         mutex_lock(&ide_cfg_mtx);
 400         spin_lock_irq(&ide_lock);
 401         hwif = &ide_hwifs[index];
 402         if (!hwif->present)
 403                 goto abort;
 404         __ide_port_unregister_devices(hwif);
 405         hwif->present = 0;
 406
 407         spin_unlock_irq(&ide_lock);
 408
 409         ide_proc_unregister_port(hwif);
 410
 411         hwgroup = hwif->hwgroup;
 412         /*
 413          * free the irq if we were the only hwif using it
 414          */
 415         g = hwgroup->hwif;
 416         do {
 417                 if (g->irq == hwif->irq)
 418                         ++irq_count;
 419                 g = g->next;
 420         } while (g != hwgroup->hwif);
 421         if (irq_count == 1)
 422                 free_irq(hwif->irq, hwgroup);
 423
 424         ide_remove_port_from_hwgroup(hwif);
 425
 426         device_unregister(hwif->portdev);
 427         device_unregister(&hwif->gendev);
 428         wait_for_completion(&hwif->gendev_rel_comp);
 429
 430         /*
 431          * Remove us from the kernel's knowledge
 432          */
 433         blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
 434         kfree(hwif->sg_table);
 435         unregister_blkdev(hwif->major, hwif->name);
 436         spin_lock_irq(&ide_lock);
 437
 438         if (hwif->dma_base)
 439                 (void)ide_release_dma(hwif);
 440
 441         ide_hwif_release_regions(hwif);
 442
 443         /* restore hwif data to pristine status */
 444         ide_init_port_data(hwif, index);
 445
 446 abort:
 447         spin_unlock_irq(&ide_lock);
 448         mutex_unlock(&ide_cfg_mtx);
 449 }
 450
 451 EXPORT_SYMBOL(ide_unregister);
 452
 453 void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw)
 454 {
 455         memcpy(hwif->io_ports, hw->io_ports, sizeof(hwif->io_ports));
 456         hwif->irq = hw->irq;
 457         hwif->noprobe = 0;
 458         hwif->chipset = hw->chipset;
 459         hwif->gendev.parent = hw->dev;
 460         hwif->ack_intr = hw->ack_intr;
 461 }
 462 EXPORT_SYMBOL_GPL(ide_init_port_hw);
 463
 464 /*
 465  *      Locks for IDE setting functionality
 466  */
 467
 468 DEFINE_MUTEX(ide_setting_mtx);
 469
 470 EXPORT_SYMBOL_GPL(ide_setting_mtx);
 471
 472 /**
 473  *      ide_spin_wait_hwgroup   -       wait for group
 474  *      @drive: drive in the group
 475  *
 476  *      Wait for an IDE device group to go non busy and then return
 477  *      holding the ide_lock which guards the hwgroup->busy status
 478  *      and right to use it.
 479  */
 480
 481 int ide_spin_wait_hwgroup (ide_drive_t *drive)
 482 {
 483         ide_hwgroup_t *hwgroup = HWGROUP(drive);
 484         unsigned long timeout = jiffies + (3 * HZ);
 485
 486         spin_lock_irq(&ide_lock);
 487
 488         while (hwgroup->busy) {
 489                 unsigned long lflags;
 490                 spin_unlock_irq(&ide_lock);
 491                 local_irq_set(lflags);
 492                 if (time_after(jiffies, timeout)) {
 493                         local_irq_restore(lflags);
 494                         printk(KERN_ERR "%s: channel busy\n", drive->name);
 495                         return -EBUSY;
 496                 }
 497                 local_irq_restore(lflags);
 498                 spin_lock_irq(&ide_lock);
 499         }
 500         return 0;
 501 }
 502
 503 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
 504
 505 int set_io_32bit(ide_drive_t *drive, int arg)
 506 {
 507         if (drive->no_io_32bit)
 508                 return -EPERM;
 509
 510         if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
 511                 return -EINVAL;
 512
 513         if (ide_spin_wait_hwgroup(drive))
 514                 return -EBUSY;
 515
 516         drive->io_32bit = arg;
 517
 518         spin_unlock_irq(&ide_lock);
 519
 520         return 0;
 521 }
 522
 523 static int set_ksettings(ide_drive_t *drive, int arg)
 524 {
 525         if (arg < 0 || arg > 1)
 526                 return -EINVAL;
 527
 528         if (ide_spin_wait_hwgroup(drive))
 529                 return -EBUSY;
 530         drive->keep_settings = arg;
 531         spin_unlock_irq(&ide_lock);
 532
 533         return 0;
 534 }
 535
 536 int set_using_dma(ide_drive_t *drive, int arg)
 537 {
 538 #ifdef CONFIG_BLK_DEV_IDEDMA
 539         ide_hwif_t *hwif = drive->hwif;
 540         int err = -EPERM;
 541
 542         if (arg < 0 || arg > 1)
 543                 return -EINVAL;
 544
 545         if (!drive->id || !(drive->id->capability & 1))
 546                 goto out;
 547
 548         if (hwif->dma_host_set == NULL)
 549                 goto out;
 550
 551         err = -EBUSY;
 552         if (ide_spin_wait_hwgroup(drive))
 553                 goto out;
 554         /*
 555          * set ->busy flag, unlock and let it ride
 556          */
 557         hwif->hwgroup->busy = 1;
 558         spin_unlock_irq(&ide_lock);
 559
 560         err = 0;
 561
 562         if (arg) {
 563                 if (ide_set_dma(drive))
 564                         err = -EIO;
 565         } else
 566                 ide_dma_off(drive);
 567
 568         /*
 569          * lock, clear ->busy flag and unlock before leaving
 570          */
 571         spin_lock_irq(&ide_lock);
 572         hwif->hwgroup->busy = 0;
 573         spin_unlock_irq(&ide_lock);
 574 out:
 575         return err;
 576 #else
 577         if (arg < 0 || arg > 1)
 578                 return -EINVAL;
 579
 580         return -EPERM;
 581 #endif
 582 }
 583
 584 int set_pio_mode(ide_drive_t *drive, int arg)
 585 {
 586         struct request rq;
 587         ide_hwif_t *hwif = drive->hwif;
 588
 589         if (arg < 0 || arg > 255)
 590                 return -EINVAL;
 591
 592         if (hwif->set_pio_mode == NULL ||
 593             (hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
 594                 return -ENOSYS;
 595
 596         if (drive->special.b.set_tune)
 597                 return -EBUSY;
 598
 599         ide_init_drive_cmd(&rq);
 600         rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
 601
 602         drive->tune_req = (u8) arg;
 603         drive->special.b.set_tune = 1;
 604         (void) ide_do_drive_cmd(drive, &rq, ide_wait);
 605         return 0;
 606 }
 607
 608 static int set_unmaskirq(ide_drive_t *drive, int arg)
 609 {
 610         if (drive->no_unmask)
 611                 return -EPERM;
 612
 613         if (arg < 0 || arg > 1)
 614                 return -EINVAL;
 615
 616         if (ide_spin_wait_hwgroup(drive))
 617                 return -EBUSY;
 618         drive->unmask = arg;
 619         spin_unlock_irq(&ide_lock);
 620
 621         return 0;
 622 }
 623
 624 /**
 625  *      system_bus_clock        -       clock guess
 626  *
 627  *      External version of the bus clock guess used by very old IDE drivers
 628  *      for things like VLB timings. Should not be used.
 629  */
 630
 631 int system_bus_clock (void)
 632 {
 633         return system_bus_speed;
 634 }
 635
 636 EXPORT_SYMBOL(system_bus_clock);
 637
 638 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
 639 {
 640         ide_drive_t *drive = dev->driver_data;
 641         ide_hwif_t *hwif = HWIF(drive);
 642         struct request rq;
 643         struct request_pm_state rqpm;
 644         ide_task_t args;
 645         int ret;
 646
 647         /* Call ACPI _GTM only once */
 648         if (!(drive->dn % 2))
 649                 ide_acpi_get_timing(hwif);
 650
 651         memset(&rq, 0, sizeof(rq));
 652         memset(&rqpm, 0, sizeof(rqpm));
 653         memset(&args, 0, sizeof(args));
 654         rq.cmd_type = REQ_TYPE_PM_SUSPEND;
 655         rq.special = &args;
 656         rq.data = &rqpm;
 657         rqpm.pm_step = ide_pm_state_start_suspend;
 658         if (mesg.event == PM_EVENT_PRETHAW)
 659                 mesg.event = PM_EVENT_FREEZE;
 660         rqpm.pm_state = mesg.event;
 661
 662         ret = ide_do_drive_cmd(drive, &rq, ide_wait);
 663         /* only call ACPI _PS3 after both drivers are suspended */
 664         if (!ret && (((drive->dn % 2) && hwif->drives[0].present
 665                  && hwif->drives[1].present)
 666                  || !hwif->drives[0].present
 667                  || !hwif->drives[1].present))
 668                 ide_acpi_set_state(hwif, 0);
 669         return ret;
 670 }
 671
 672 static int generic_ide_resume(struct device *dev)
 673 {
 674         ide_drive_t *drive = dev->driver_data;
 675         ide_hwif_t *hwif = HWIF(drive);
 676         struct request rq;
 677         struct request_pm_state rqpm;
 678         ide_task_t args;
 679         int err;
 680
 681         /* Call ACPI _STM only once */
 682         if (!(drive->dn % 2)) {
 683                 ide_acpi_set_state(hwif, 1);
 684                 ide_acpi_push_timing(hwif);
 685         }
 686
 687         ide_acpi_exec_tfs(drive);
 688
 689         memset(&rq, 0, sizeof(rq));
 690         memset(&rqpm, 0, sizeof(rqpm));
 691         memset(&args, 0, sizeof(args));
 692         rq.cmd_type = REQ_TYPE_PM_RESUME;
 693         rq.special = &args;
 694         rq.data = &rqpm;
 695         rqpm.pm_step = ide_pm_state_start_resume;
 696         rqpm.pm_state = PM_EVENT_ON;
 697
 698         err = ide_do_drive_cmd(drive, &rq, ide_head_wait);
 699
 700         if (err == 0 && dev->driver) {
 701                 ide_driver_t *drv = to_ide_driver(dev->driver);
 702
 703                 if (drv->resume)
 704                         drv->resume(drive);
 705         }
 706
 707         return err;
 708 }
 709
 710 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
 711                         unsigned int cmd, unsigned long arg)
 712 {
 713         unsigned long flags;
 714         ide_driver_t *drv;
 715         void __user *p = (void __user *)arg;
 716         int err = 0, (*setfunc)(ide_drive_t *, int);
 717         u8 *val;
 718
 719         switch (cmd) {
 720         case HDIO_GET_32BIT:        val = &drive->io_32bit;      goto read_val;
 721         case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
 722         case HDIO_GET_UNMASKINTR:   val = &drive->unmask;        goto read_val;
 723         case HDIO_GET_DMA:          val = &drive->using_dma;     goto read_val;
 724         case HDIO_SET_32BIT:        setfunc = set_io_32bit;      goto set_val;
 725         case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings;     goto set_val;
 726         case HDIO_SET_PIO_MODE:     setfunc = set_pio_mode;      goto set_val;
 727         case HDIO_SET_UNMASKINTR:   setfunc = set_unmaskirq;     goto set_val;
 728         case HDIO_SET_DMA:          setfunc = set_using_dma;     goto set_val;
 729         }
 730
 731         switch (cmd) {
 732                 case HDIO_OBSOLETE_IDENTITY:
 733                 case HDIO_GET_IDENTITY:
 734                         if (bdev != bdev->bd_contains)
 735                                 return -EINVAL;
 736                         if (drive->id_read == 0)
 737                                 return -ENOMSG;
 738                         if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
 739                                 return -EFAULT;
 740                         return 0;
 741
 742                 case HDIO_GET_NICE:
 743                         return put_user(drive->dsc_overlap      <<      IDE_NICE_DSC_OVERLAP    |
 744                                         drive->atapi_overlap    <<      IDE_NICE_ATAPI_OVERLAP  |
 745                                         drive->nice1 << IDE_NICE_1,
 746                                         (long __user *) arg);
 747 #ifdef CONFIG_IDE_TASK_IOCTL
 748                 case HDIO_DRIVE_TASKFILE:
 749                         if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
 750                                 return -EACCES;
 751                         switch(drive->media) {
 752                                 case ide_disk:
 753                                         return ide_taskfile_ioctl(drive, cmd, arg);
 754                                 default:
 755                                         return -ENOMSG;
 756                         }
 757 #endif /* CONFIG_IDE_TASK_IOCTL */
 758
 759                 case HDIO_DRIVE_CMD:
 760                         if (!capable(CAP_SYS_RAWIO))
 761                                 return -EACCES;
 762                         return ide_cmd_ioctl(drive, cmd, arg);
 763
 764                 case HDIO_DRIVE_TASK:
 765                         if (!capable(CAP_SYS_RAWIO))
 766                                 return -EACCES;
 767                         return ide_task_ioctl(drive, cmd, arg);
 768                 case HDIO_SET_NICE:
 769                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
 770                         if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
 771                                 return -EPERM;
 772                         drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
 773                         drv = *(ide_driver_t **)bdev->bd_disk->private_data;
 774                         if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
 775                                 drive->dsc_overlap = 0;
 776                                 return -EPERM;
 777                         }
 778                         drive->nice1 = (arg >> IDE_NICE_1) & 1;
 779                         return 0;
 780                 case HDIO_DRIVE_RESET:
 781                         if (!capable(CAP_SYS_ADMIN))
 782                                 return -EACCES;
 783
 784                         /*
 785                          *      Abort the current command on the
 786                          *      group if there is one, taking
 787                          *      care not to allow anything else
 788                          *      to be queued and to die on the
 789                          *      spot if we miss one somehow
 790                          */
 791
 792                         spin_lock_irqsave(&ide_lock, flags);
 793
 794                         if (HWGROUP(drive)->resetting) {
 795                                 spin_unlock_irqrestore(&ide_lock, flags);
 796                                 return -EBUSY;
 797                         }
 798
 799                         ide_abort(drive, "drive reset");
 800
 801                         BUG_ON(HWGROUP(drive)->handler);
 802
 803                         /* Ensure nothing gets queued after we
 804                            drop the lock. Reset will clear the busy */
 805
 806                         HWGROUP(drive)->busy = 1;
 807                         spin_unlock_irqrestore(&ide_lock, flags);
 808                         (void) ide_do_reset(drive);
 809
 810                         return 0;
 811                 case HDIO_GET_BUSSTATE:
 812                         if (!capable(CAP_SYS_ADMIN))
 813                                 return -EACCES;
 814                         if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
 815                                 return -EFAULT;
 816                         return 0;
 817
 818                 case HDIO_SET_BUSSTATE:
 819                         if (!capable(CAP_SYS_ADMIN))
 820                                 return -EACCES;
 821                         return -EOPNOTSUPP;
 822                 default:
 823                         return -EINVAL;
 824         }
 825
 826 read_val:
 827         mutex_lock(&ide_setting_mtx);
 828         spin_lock_irqsave(&ide_lock, flags);
 829         err = *val;
 830         spin_unlock_irqrestore(&ide_lock, flags);
 831         mutex_unlock(&ide_setting_mtx);
 832         return err >= 0 ? put_user(err, (long __user *)arg) : err;
 833
 834 set_val:
 835         if (bdev != bdev->bd_contains)
 836                 err = -EINVAL;
 837         else {
 838                 if (!capable(CAP_SYS_ADMIN))
 839                         err = -EACCES;
 840                 else {
 841                         mutex_lock(&ide_setting_mtx);
 842                         err = setfunc(drive, arg);
 843                         mutex_unlock(&ide_setting_mtx);
 844                 }
 845         }
 846         return err;
 847 }
 848
 849 EXPORT_SYMBOL(generic_ide_ioctl);
 850
 851 /*
 852  * stridx() returns the offset of c within s,
 853  * or -1 if c is '\0' or not found within s.
 854  */
 855 static int __init stridx (const char *s, char c)
 856 {
 857         char *i = strchr(s, c);
 858         return (i && c) ? i - s : -1;
 859 }
 860
 861 /*
 862  * match_parm() does parsing for ide_setup():
 863  *
 864  * 1. the first char of s must be '='.
 865  * 2. if the remainder matches one of the supplied keywords,
 866  *     the index (1 based) of the keyword is negated and returned.
 867  * 3. if the remainder is a series of no more than max_vals numbers
 868  *     separated by commas, the numbers are saved in vals[] and a
 869  *     count of how many were saved is returned.  Base10 is assumed,
 870  *     and base16 is allowed when prefixed with "0x".
 871  * 4. otherwise, zero is returned.
 872  */
 873 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
 874 {
 875         static const char *decimal = "0123456789";
 876         static const char *hex = "0123456789abcdef";
 877         int i, n;
 878
 879         if (*s++ == '=') {
 880                 /*
 881                  * Try matching against the supplied keywords,
 882                  * and return -(index+1) if we match one
 883                  */
 884                 if (keywords != NULL) {
 885                         for (i = 0; *keywords != NULL; ++i) {
 886                                 if (!strcmp(s, *keywords++))
 887                                         return -(i+1);
 888                         }
 889                 }
 890                 /*
 891                  * Look for a series of no more than "max_vals"
 892                  * numeric values separated by commas, in base10,
 893                  * or base16 when prefixed with "0x".
 894                  * Return a count of how many were found.
 895                  */
 896                 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
 897                         vals[n] = i;
 898                         while ((i = stridx(decimal, *++s)) >= 0)
 899                                 vals[n] = (vals[n] * 10) + i;
 900                         if (*s == 'x' && !vals[n]) {
 901                                 while ((i = stridx(hex, *++s)) >= 0)
 902                                         vals[n] = (vals[n] * 0x10) + i;
 903                         }
 904                         if (++n == max_vals)
 905                                 break;
 906                         if (*s == ',' || *s == ';')
 907                                 ++s;
 908                 }
 909                 if (!*s)
 910                         return n;
 911         }
 912         return 0;       /* zero = nothing matched */
 913 }
 914
 915 extern int probe_ali14xx;
 916 extern int probe_umc8672;
 917 extern int probe_dtc2278;
 918 extern int probe_ht6560b;
 919 extern int probe_qd65xx;
 920 extern int cmd640_vlb;
 921 extern int probe_4drives;
 922
 923 static int __initdata is_chipset_set;
 924
 925 /*
 926  * ide_setup() gets called VERY EARLY during initialization,
 927  * to handle kernel "command line" strings beginning with "hdx=" or "ide".
 928  *
 929  * Remember to update Documentation/ide/ide.txt if you change something here.
 930  */
 931 static int __init ide_setup(char *s)
 932 {
 933         int i, vals[3];
 934         ide_hwif_t *hwif;
 935         ide_drive_t *drive;
 936         unsigned int hw, unit;
 937         const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
 938         const char max_hwif  = '0' + (MAX_HWIFS - 1);
 939
 940
 941         if (strncmp(s,"hd",2) == 0 && s[2] == '=')      /* hd= is for hd.c   */
 942                 return 0;                               /* driver and not us */
 943
 944         if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
 945                 return 0;
 946
 947         printk(KERN_INFO "ide_setup: %s", s);
 948         init_ide_data ();
 949
 950 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
 951         if (!strcmp(s, "ide=doubler")) {
 952                 extern int ide_doubler;
 953
 954                 printk(" : Enabled support for IDE doublers\n");
 955                 ide_doubler = 1;
 956                 return 1;
 957         }
 958 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
 959
 960         if (!strcmp(s, "ide=nodma")) {
 961                 printk(" : Prevented DMA\n");
 962                 noautodma = 1;
 963                 goto obsolete_option;
 964         }
 965
 966 #ifdef CONFIG_BLK_DEV_IDEACPI
 967         if (!strcmp(s, "ide=noacpi")) {
 968                 //printk(" : Disable IDE ACPI support.\n");
 969                 ide_noacpi = 1;
 970                 return 1;
 971         }
 972         if (!strcmp(s, "ide=acpigtf")) {
 973                 //printk(" : Enable IDE ACPI _GTF support.\n");
 974                 ide_noacpitfs = 0;
 975                 return 1;
 976         }
 977         if (!strcmp(s, "ide=acpionboot")) {
 978                 //printk(" : Call IDE ACPI methods on boot.\n");
 979                 ide_noacpionboot = 0;
 980                 return 1;
 981         }
 982 #endif /* CONFIG_BLK_DEV_IDEACPI */
 983
 984         /*
 985          * Look for drive options:  "hdx="
 986          */
 987         if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
 988                 const char *hd_words[] = {
 989                         "none", "noprobe", "nowerr", "cdrom", "nodma",
 990                         "autotune", "noautotune", "-8", "-9", "-10",
 991                         "noflush", "remap", "remap63", "scsi", NULL };
 992                 unit = s[2] - 'a';
 993                 hw   = unit / MAX_DRIVES;
 994                 unit = unit % MAX_DRIVES;
 995                 hwif = &ide_hwifs[hw];
 996                 drive = &hwif->drives[unit];
 997                 if (strncmp(s + 4, "ide-", 4) == 0) {
 998                         strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
 999                         goto obsolete_option;
1000                 }
1001                 switch (match_parm(&s[3], hd_words, vals, 3)) {
1002                         case -1: /* "none" */
1003                         case -2: /* "noprobe" */
1004                                 drive->noprobe = 1;
1005                                 goto done;
1006                         case -3: /* "nowerr" */
1007                                 drive->bad_wstat = BAD_R_STAT;
1008                                 hwif->noprobe = 0;
1009                                 goto done;
1010                         case -4: /* "cdrom" */
1011                                 drive->present = 1;
1012                                 drive->media = ide_cdrom;
1013                                 /* an ATAPI device ignores DRDY */
1014                                 drive->ready_stat = 0;
1015                                 hwif->noprobe = 0;
1016                                 goto done;
1017                         case -5: /* nodma */
1018                                 drive->nodma = 1;
1019                                 goto done;
1020                         case -6: /* "autotune" */
1021                                 drive->autotune = IDE_TUNE_AUTO;
1022                                 goto obsolete_option;
1023                         case -7: /* "noautotune" */
1024                                 drive->autotune = IDE_TUNE_NOAUTO;
1025                                 goto obsolete_option;
1026                         case -11: /* noflush */
1027                                 drive->noflush = 1;
1028                                 goto done;
1029                         case -12: /* "remap" */
1030                                 drive->remap_0_to_1 = 1;
1031                                 goto obsolete_option;
1032                         case -13: /* "remap63" */
1033                                 drive->sect0 = 63;
1034                                 goto obsolete_option;
1035                         case -14: /* "scsi" */
1036                                 drive->scsi = 1;
1037                                 goto obsolete_option;
1038                         case 3: /* cyl,head,sect */
1039                                 drive->media    = ide_disk;
1040                                 drive->ready_stat = READY_STAT;
1041                                 drive->cyl      = drive->bios_cyl  = vals[0];
1042                                 drive->head     = drive->bios_head = vals[1];
1043                                 drive->sect     = drive->bios_sect = vals[2];
1044                                 drive->present  = 1;
1045                                 drive->forced_geom = 1;
1046                                 hwif->noprobe = 0;
1047                                 goto done;
1048                         default:
1049                                 goto bad_option;
1050                 }
1051         }
1052
1053         if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1054                 goto bad_option;
1055         /*
1056          * Look for bus speed option:  "idebus="
1057          */
1058         if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1059                 if (match_parm(&s[6], NULL, vals, 1) != 1)
1060                         goto bad_option;
1061                 if (vals[0] >= 20 && vals[0] <= 66) {
1062                         idebus_parameter = vals[0];
1063                 } else
1064                         printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1065                 goto done;
1066         }
1067         /*
1068          * Look for interface options:  "idex="
1069          */
1070         if (s[3] >= '0' && s[3] <= max_hwif) {
1071                 /*
1072                  * Be VERY CAREFUL changing this: note hardcoded indexes below
1073                  * (-8, -9, -10) are reserved to ease the hardcoding.
1074                  */
1075                 static const char *ide_words[] = {
1076                         "minus1", "serialize", "minus3", "minus4",
1077                         "reset", "minus6", "ata66", "minus8", "minus9",
1078                         "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1079                         "dtc2278", "umc8672", "ali14xx", NULL };
1080
1081                 hw = s[3] - '0';
1082                 hwif = &ide_hwifs[hw];
1083                 i = match_parm(&s[4], ide_words, vals, 3);
1084
1085                 /*
1086                  * Cryptic check to ensure chipset not already set for hwif.
1087                  * Note: we can't depend on hwif->chipset here.
1088                  */
1089                 if (i >= -18 && i <= -11) {
1090                         /* chipset already specified */
1091                         if (is_chipset_set)
1092                                 goto bad_option;
1093                         /* these drivers are for "ide0=" only */
1094                         if (hw != 0)
1095                                 goto bad_hwif;
1096                         is_chipset_set = 1;
1097                         printk("\n");
1098                 }
1099
1100                 switch (i) {
1101 #ifdef CONFIG_BLK_DEV_ALI14XX
1102                         case -17: /* "ali14xx" */
1103                                 probe_ali14xx = 1;
1104                                 goto obsolete_option;
1105 #endif
1106 #ifdef CONFIG_BLK_DEV_UMC8672
1107                         case -16: /* "umc8672" */
1108                                 probe_umc8672 = 1;
1109                                 goto obsolete_option;
1110 #endif
1111 #ifdef CONFIG_BLK_DEV_DTC2278
1112                         case -15: /* "dtc2278" */
1113                                 probe_dtc2278 = 1;
1114                                 goto obsolete_option;
1115 #endif
1116 #ifdef CONFIG_BLK_DEV_CMD640
1117                         case -14: /* "cmd640_vlb" */
1118                                 cmd640_vlb = 1;
1119                                 goto obsolete_option;
1120 #endif
1121 #ifdef CONFIG_BLK_DEV_HT6560B
1122                         case -13: /* "ht6560b" */
1123                                 probe_ht6560b = 1;
1124                                 goto obsolete_option;
1125 #endif
1126 #ifdef CONFIG_BLK_DEV_QD65XX
1127                         case -12: /* "qd65xx" */
1128                                 probe_qd65xx = 1;
1129                                 goto obsolete_option;
1130 #endif
1131 #ifdef CONFIG_BLK_DEV_4DRIVES
1132                         case -11: /* "four" drives on one set of ports */
1133                                 probe_4drives = 1;
1134                                 goto obsolete_option;
1135 #endif
1136                         case -10: /* minus10 */
1137                         case -9: /* minus9 */
1138                         case -8: /* minus8 */
1139                         case -6:
1140                         case -4:
1141                         case -3:
1142                                 goto bad_option;
1143                         case -7: /* ata66 */
1144 #ifdef CONFIG_BLK_DEV_IDEPCI
1145                                 /*
1146                                  * Use ATA_CBL_PATA40_SHORT so drive side
1147                                  * cable detection is also overriden.
1148                                  */
1149                                 hwif->cbl = ATA_CBL_PATA40_SHORT;
1150                                 goto obsolete_option;
1151 #else
1152                                 goto bad_hwif;
1153 #endif
1154                         case -5: /* "reset" */
1155                                 hwif->reset = 1;
1156                                 goto obsolete_option;
1157                         case -2: /* "serialize" */
1158                                 hwif->mate = &ide_hwifs[hw^1];
1159                                 hwif->mate->mate = hwif;
1160                                 hwif->serialized = hwif->mate->serialized = 1;
1161                                 goto obsolete_option;
1162
1163                         case -1:
1164                         case 0:
1165                         case 1:
1166                         case 2:
1167                         case 3:
1168                                 goto bad_option;
1169                         default:
1170                                 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1171                                 return 1;
1172                 }
1173         }
1174 bad_option:
1175         printk(" -- BAD OPTION\n");
1176         return 1;
1177 obsolete_option:
1178         printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1179         return 1;
1180 bad_hwif:
1181         printk("-- NOT SUPPORTED ON ide%d", hw);
1182 done:
1183         printk("\n");
1184         return 1;
1185 }
1186
1187 EXPORT_SYMBOL(ide_lock);
1188
1189 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1190 {
1191         return 1;
1192 }
1193
1194 static char *media_string(ide_drive_t *drive)
1195 {
1196         switch (drive->media) {
1197         case ide_disk:
1198                 return "disk";
1199         case ide_cdrom:
1200                 return "cdrom";
1201         case ide_tape:
1202                 return "tape";
1203         case ide_floppy:
1204                 return "floppy";
1205         case ide_optical:
1206                 return "optical";
1207         default:
1208                 return "UNKNOWN";
1209         }
1210 }
1211
1212 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1213 {
1214         ide_drive_t *drive = to_ide_device(dev);
1215         return sprintf(buf, "%s\n", media_string(drive));
1216 }
1217
1218 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1219 {
1220         ide_drive_t *drive = to_ide_device(dev);
1221         return sprintf(buf, "%s\n", drive->name);
1222 }
1223
1224 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1225 {
1226         ide_drive_t *drive = to_ide_device(dev);
1227         return sprintf(buf, "ide:m-%s\n", media_string(drive));
1228 }
1229
1230 static ssize_t model_show(struct device *dev, struct device_attribute *attr,
1231                           char *buf)
1232 {
1233         ide_drive_t *drive = to_ide_device(dev);
1234         return sprintf(buf, "%s\n", drive->id->model);
1235 }
1236
1237 static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
1238                              char *buf)
1239 {
1240         ide_drive_t *drive = to_ide_device(dev);
1241         return sprintf(buf, "%s\n", drive->id->fw_rev);
1242 }
1243
1244 static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
1245                            char *buf)
1246 {
1247         ide_drive_t *drive = to_ide_device(dev);
1248         return sprintf(buf, "%s\n", drive->id->serial_no);
1249 }
1250
1251 static struct device_attribute ide_dev_attrs[] = {
1252         __ATTR_RO(media),
1253         __ATTR_RO(drivename),
1254         __ATTR_RO(modalias),
1255         __ATTR_RO(model),
1256         __ATTR_RO(firmware),
1257         __ATTR(serial, 0400, serial_show, NULL),
1258         __ATTR_NULL
1259 };
1260
1261 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
1262 {
1263         ide_drive_t *drive = to_ide_device(dev);
1264
1265         add_uevent_var(env, "MEDIA=%s", media_string(drive));
1266         add_uevent_var(env, "DRIVENAME=%s", drive->name);
1267         add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
1268         return 0;
1269 }
1270
1271 static int generic_ide_probe(struct device *dev)
1272 {
1273         ide_drive_t *drive = to_ide_device(dev);
1274         ide_driver_t *drv = to_ide_driver(dev->driver);
1275
1276         return drv->probe ? drv->probe(drive) : -ENODEV;
1277 }
1278
1279 static int generic_ide_remove(struct device *dev)
1280 {
1281         ide_drive_t *drive = to_ide_device(dev);
1282         ide_driver_t *drv = to_ide_driver(dev->driver);
1283
1284         if (drv->remove)
1285                 drv->remove(drive);
1286
1287         return 0;
1288 }
1289
1290 static void generic_ide_shutdown(struct device *dev)
1291 {
1292         ide_drive_t *drive = to_ide_device(dev);
1293         ide_driver_t *drv = to_ide_driver(dev->driver);
1294
1295         if (dev->driver && drv->shutdown)
1296                 drv->shutdown(drive);
1297 }
1298
1299 struct bus_type ide_bus_type = {
1300         .name           = "ide",
1301         .match          = ide_bus_match,
1302         .uevent         = ide_uevent,
1303         .probe          = generic_ide_probe,
1304         .remove         = generic_ide_remove,
1305         .shutdown       = generic_ide_shutdown,
1306         .dev_attrs      = ide_dev_attrs,
1307         .suspend        = generic_ide_suspend,
1308         .resume         = generic_ide_resume,
1309 };
1310
1311 EXPORT_SYMBOL_GPL(ide_bus_type);
1312
1313 static void ide_port_class_release(struct device *portdev)
1314 {
1315         ide_hwif_t *hwif = dev_get_drvdata(portdev);
1316
1317         put_device(&hwif->gendev);
1318 }
1319
1320 /*
1321  * This is gets invoked once during initialization, to set *everything* up
1322  */
1323 static int __init ide_init(void)
1324 {
1325         int ret;
1326
1327         printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n");
1328         system_bus_speed = ide_system_bus_speed();
1329
1330         printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
1331                          "for PIO modes%s\n", system_bus_speed,
1332                         idebus_parameter ? "" : "; override with idebus=xx");
1333
1334         ret = bus_register(&ide_bus_type);
1335         if (ret < 0) {
1336                 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1337                 return ret;
1338         }
1339
1340         ide_port_class = class_create(THIS_MODULE, "ide_port");
1341         if (IS_ERR(ide_port_class)) {
1342                 ret = PTR_ERR(ide_port_class);
1343                 goto out_port_class;
1344         }
1345         ide_port_class->dev_release = ide_port_class_release;
1346
1347         init_ide_data();
1348
1349         proc_ide_create();
1350
1351         return 0;
1352
1353 out_port_class:
1354         bus_unregister(&ide_bus_type);
1355
1356         return ret;
1357 }
1358
1359 #ifdef MODULE
1360 static char *options = NULL;
1361 module_param(options, charp, 0);
1362 MODULE_LICENSE("GPL");
1363
1364 static void __init parse_options (char *line)
1365 {
1366         char *next = line;
1367
1368         if (line == NULL || !*line)
1369                 return;
1370         while ((line = next) != NULL) {
1371                 if ((next = strchr(line,' ')) != NULL)
1372                         *next++ = 0;
1373                 if (!ide_setup(line))
1374                         printk (KERN_INFO "Unknown option '%s'\n", line);
1375         }
1376 }
1377
1378 int __init init_module (void)
1379 {
1380         parse_options(options);
1381         return ide_init();
1382 }
1383
1384 void __exit cleanup_module (void)
1385 {
1386         int index;
1387
1388         for (index = 0; index < MAX_HWIFS; ++index)
1389                 ide_unregister(index);
1390
1391         proc_ide_destroy();
1392
1393         class_destroy(ide_port_class);
1394
1395         bus_unregister(&ide_bus_type);
1396 }
1397
1398 #else /* !MODULE */
1399
1400 __setup("", ide_setup);
1401
1402 module_init(ide_init);
1403
1404 #endif /* MODULE */