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->chipset = hw->chipset;
 458         hwif->gendev.parent = hw->dev;
 459         hwif->ack_intr = hw->ack_intr;
 460 }
 461 EXPORT_SYMBOL_GPL(ide_init_port_hw);
 462
 463 /*
 464  *      Locks for IDE setting functionality
 465  */
 466
 467 DEFINE_MUTEX(ide_setting_mtx);
 468
 469 EXPORT_SYMBOL_GPL(ide_setting_mtx);
 470
 471 /**
 472  *      ide_spin_wait_hwgroup   -       wait for group
 473  *      @drive: drive in the group
 474  *
 475  *      Wait for an IDE device group to go non busy and then return
 476  *      holding the ide_lock which guards the hwgroup->busy status
 477  *      and right to use it.
 478  */
 479
 480 int ide_spin_wait_hwgroup (ide_drive_t *drive)
 481 {
 482         ide_hwgroup_t *hwgroup = HWGROUP(drive);
 483         unsigned long timeout = jiffies + (3 * HZ);
 484
 485         spin_lock_irq(&ide_lock);
 486
 487         while (hwgroup->busy) {
 488                 unsigned long lflags;
 489                 spin_unlock_irq(&ide_lock);
 490                 local_irq_set(lflags);
 491                 if (time_after(jiffies, timeout)) {
 492                         local_irq_restore(lflags);
 493                         printk(KERN_ERR "%s: channel busy\n", drive->name);
 494                         return -EBUSY;
 495                 }
 496                 local_irq_restore(lflags);
 497                 spin_lock_irq(&ide_lock);
 498         }
 499         return 0;
 500 }
 501
 502 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
 503
 504 int set_io_32bit(ide_drive_t *drive, int arg)
 505 {
 506         if (drive->no_io_32bit)
 507                 return -EPERM;
 508
 509         if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
 510                 return -EINVAL;
 511
 512         if (ide_spin_wait_hwgroup(drive))
 513                 return -EBUSY;
 514
 515         drive->io_32bit = arg;
 516
 517         spin_unlock_irq(&ide_lock);
 518
 519         return 0;
 520 }
 521
 522 static int set_ksettings(ide_drive_t *drive, int arg)
 523 {
 524         if (arg < 0 || arg > 1)
 525                 return -EINVAL;
 526
 527         if (ide_spin_wait_hwgroup(drive))
 528                 return -EBUSY;
 529         drive->keep_settings = arg;
 530         spin_unlock_irq(&ide_lock);
 531
 532         return 0;
 533 }
 534
 535 int set_using_dma(ide_drive_t *drive, int arg)
 536 {
 537 #ifdef CONFIG_BLK_DEV_IDEDMA
 538         ide_hwif_t *hwif = drive->hwif;
 539         int err = -EPERM;
 540
 541         if (arg < 0 || arg > 1)
 542                 return -EINVAL;
 543
 544         if (!drive->id || !(drive->id->capability & 1))
 545                 goto out;
 546
 547         if (hwif->dma_host_set == NULL)
 548                 goto out;
 549
 550         err = -EBUSY;
 551         if (ide_spin_wait_hwgroup(drive))
 552                 goto out;
 553         /*
 554          * set ->busy flag, unlock and let it ride
 555          */
 556         hwif->hwgroup->busy = 1;
 557         spin_unlock_irq(&ide_lock);
 558
 559         err = 0;
 560
 561         if (arg) {
 562                 if (ide_set_dma(drive))
 563                         err = -EIO;
 564         } else
 565                 ide_dma_off(drive);
 566
 567         /*
 568          * lock, clear ->busy flag and unlock before leaving
 569          */
 570         spin_lock_irq(&ide_lock);
 571         hwif->hwgroup->busy = 0;
 572         spin_unlock_irq(&ide_lock);
 573 out:
 574         return err;
 575 #else
 576         if (arg < 0 || arg > 1)
 577                 return -EINVAL;
 578
 579         return -EPERM;
 580 #endif
 581 }
 582
 583 int set_pio_mode(ide_drive_t *drive, int arg)
 584 {
 585         struct request rq;
 586         ide_hwif_t *hwif = drive->hwif;
 587         const struct ide_port_ops *port_ops = hwif->port_ops;
 588
 589         if (arg < 0 || arg > 255)
 590                 return -EINVAL;
 591
 592         if (port_ops == NULL || port_ops->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                                 goto done;
1009                         case -4: /* "cdrom" */
1010                                 drive->present = 1;
1011                                 drive->media = ide_cdrom;
1012                                 /* an ATAPI device ignores DRDY */
1013                                 drive->ready_stat = 0;
1014                                 goto done;
1015                         case -5: /* nodma */
1016                                 drive->nodma = 1;
1017                                 goto done;
1018                         case -6: /* "autotune" */
1019                                 drive->autotune = IDE_TUNE_AUTO;
1020                                 goto obsolete_option;
1021                         case -7: /* "noautotune" */
1022                                 drive->autotune = IDE_TUNE_NOAUTO;
1023                                 goto obsolete_option;
1024                         case -11: /* noflush */
1025                                 drive->noflush = 1;
1026                                 goto done;
1027                         case -12: /* "remap" */
1028                                 drive->remap_0_to_1 = 1;
1029                                 goto obsolete_option;
1030                         case -13: /* "remap63" */
1031                                 drive->sect0 = 63;
1032                                 goto obsolete_option;
1033                         case -14: /* "scsi" */
1034                                 drive->scsi = 1;
1035                                 goto obsolete_option;
1036                         case 3: /* cyl,head,sect */
1037                                 drive->media    = ide_disk;
1038                                 drive->ready_stat = READY_STAT;
1039                                 drive->cyl      = drive->bios_cyl  = vals[0];
1040                                 drive->head     = drive->bios_head = vals[1];
1041                                 drive->sect     = drive->bios_sect = vals[2];
1042                                 drive->present  = 1;
1043                                 drive->forced_geom = 1;
1044                                 goto done;
1045                         default:
1046                                 goto bad_option;
1047                 }
1048         }
1049
1050         if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1051                 goto bad_option;
1052         /*
1053          * Look for bus speed option:  "idebus="
1054          */
1055         if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1056                 if (match_parm(&s[6], NULL, vals, 1) != 1)
1057                         goto bad_option;
1058                 if (vals[0] >= 20 && vals[0] <= 66) {
1059                         idebus_parameter = vals[0];
1060                 } else
1061                         printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1062                 goto done;
1063         }
1064         /*
1065          * Look for interface options:  "idex="
1066          */
1067         if (s[3] >= '0' && s[3] <= max_hwif) {
1068                 /*
1069                  * Be VERY CAREFUL changing this: note hardcoded indexes below
1070                  * (-8, -9, -10) are reserved to ease the hardcoding.
1071                  */
1072                 static const char *ide_words[] = {
1073                         "minus1", "serialize", "minus3", "minus4",
1074                         "reset", "minus6", "ata66", "minus8", "minus9",
1075                         "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1076                         "dtc2278", "umc8672", "ali14xx", NULL };
1077
1078                 hw = s[3] - '0';
1079                 hwif = &ide_hwifs[hw];
1080                 i = match_parm(&s[4], ide_words, vals, 3);
1081
1082                 /*
1083                  * Cryptic check to ensure chipset not already set for hwif.
1084                  * Note: we can't depend on hwif->chipset here.
1085                  */
1086                 if (i >= -18 && i <= -11) {
1087                         /* chipset already specified */
1088                         if (is_chipset_set)
1089                                 goto bad_option;
1090                         /* these drivers are for "ide0=" only */
1091                         if (hw != 0)
1092                                 goto bad_hwif;
1093                         is_chipset_set = 1;
1094                         printk("\n");
1095                 }
1096
1097                 switch (i) {
1098 #ifdef CONFIG_BLK_DEV_ALI14XX
1099                         case -17: /* "ali14xx" */
1100                                 probe_ali14xx = 1;
1101                                 goto obsolete_option;
1102 #endif
1103 #ifdef CONFIG_BLK_DEV_UMC8672
1104                         case -16: /* "umc8672" */
1105                                 probe_umc8672 = 1;
1106                                 goto obsolete_option;
1107 #endif
1108 #ifdef CONFIG_BLK_DEV_DTC2278
1109                         case -15: /* "dtc2278" */
1110                                 probe_dtc2278 = 1;
1111                                 goto obsolete_option;
1112 #endif
1113 #ifdef CONFIG_BLK_DEV_CMD640
1114                         case -14: /* "cmd640_vlb" */
1115                                 cmd640_vlb = 1;
1116                                 goto obsolete_option;
1117 #endif
1118 #ifdef CONFIG_BLK_DEV_HT6560B
1119                         case -13: /* "ht6560b" */
1120                                 probe_ht6560b = 1;
1121                                 goto obsolete_option;
1122 #endif
1123 #ifdef CONFIG_BLK_DEV_QD65XX
1124                         case -12: /* "qd65xx" */
1125                                 probe_qd65xx = 1;
1126                                 goto obsolete_option;
1127 #endif
1128 #ifdef CONFIG_BLK_DEV_4DRIVES
1129                         case -11: /* "four" drives on one set of ports */
1130                                 probe_4drives = 1;
1131                                 goto obsolete_option;
1132 #endif
1133                         case -10: /* minus10 */
1134                         case -9: /* minus9 */
1135                         case -8: /* minus8 */
1136                         case -6:
1137                         case -4:
1138                         case -3:
1139                                 goto bad_option;
1140                         case -7: /* ata66 */
1141 #ifdef CONFIG_BLK_DEV_IDEPCI
1142                                 /*
1143                                  * Use ATA_CBL_PATA40_SHORT so drive side
1144                                  * cable detection is also overriden.
1145                                  */
1146                                 hwif->cbl = ATA_CBL_PATA40_SHORT;
1147                                 goto obsolete_option;
1148 #else
1149                                 goto bad_hwif;
1150 #endif
1151                         case -5: /* "reset" */
1152                                 hwif->reset = 1;
1153                                 goto obsolete_option;
1154                         case -2: /* "serialize" */
1155                                 hwif->mate = &ide_hwifs[hw^1];
1156                                 hwif->mate->mate = hwif;
1157                                 hwif->serialized = hwif->mate->serialized = 1;
1158                                 goto obsolete_option;
1159
1160                         case -1:
1161                         case 0:
1162                         case 1:
1163                         case 2:
1164                         case 3:
1165                                 goto bad_option;
1166                         default:
1167                                 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1168                                 return 1;
1169                 }
1170         }
1171 bad_option:
1172         printk(" -- BAD OPTION\n");
1173         return 1;
1174 obsolete_option:
1175         printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1176         return 1;
1177 bad_hwif:
1178         printk("-- NOT SUPPORTED ON ide%d", hw);
1179 done:
1180         printk("\n");
1181         return 1;
1182 }
1183
1184 EXPORT_SYMBOL(ide_lock);
1185
1186 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1187 {
1188         return 1;
1189 }
1190
1191 static char *media_string(ide_drive_t *drive)
1192 {
1193         switch (drive->media) {
1194         case ide_disk:
1195                 return "disk";
1196         case ide_cdrom:
1197                 return "cdrom";
1198         case ide_tape:
1199                 return "tape";
1200         case ide_floppy:
1201                 return "floppy";
1202         case ide_optical:
1203                 return "optical";
1204         default:
1205                 return "UNKNOWN";
1206         }
1207 }
1208
1209 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1210 {
1211         ide_drive_t *drive = to_ide_device(dev);
1212         return sprintf(buf, "%s\n", media_string(drive));
1213 }
1214
1215 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1216 {
1217         ide_drive_t *drive = to_ide_device(dev);
1218         return sprintf(buf, "%s\n", drive->name);
1219 }
1220
1221 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1222 {
1223         ide_drive_t *drive = to_ide_device(dev);
1224         return sprintf(buf, "ide:m-%s\n", media_string(drive));
1225 }
1226
1227 static ssize_t model_show(struct device *dev, struct device_attribute *attr,
1228                           char *buf)
1229 {
1230         ide_drive_t *drive = to_ide_device(dev);
1231         return sprintf(buf, "%s\n", drive->id->model);
1232 }
1233
1234 static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
1235                              char *buf)
1236 {
1237         ide_drive_t *drive = to_ide_device(dev);
1238         return sprintf(buf, "%s\n", drive->id->fw_rev);
1239 }
1240
1241 static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
1242                            char *buf)
1243 {
1244         ide_drive_t *drive = to_ide_device(dev);
1245         return sprintf(buf, "%s\n", drive->id->serial_no);
1246 }
1247
1248 static struct device_attribute ide_dev_attrs[] = {
1249         __ATTR_RO(media),
1250         __ATTR_RO(drivename),
1251         __ATTR_RO(modalias),
1252         __ATTR_RO(model),
1253         __ATTR_RO(firmware),
1254         __ATTR(serial, 0400, serial_show, NULL),
1255         __ATTR_NULL
1256 };
1257
1258 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
1259 {
1260         ide_drive_t *drive = to_ide_device(dev);
1261
1262         add_uevent_var(env, "MEDIA=%s", media_string(drive));
1263         add_uevent_var(env, "DRIVENAME=%s", drive->name);
1264         add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
1265         return 0;
1266 }
1267
1268 static int generic_ide_probe(struct device *dev)
1269 {
1270         ide_drive_t *drive = to_ide_device(dev);
1271         ide_driver_t *drv = to_ide_driver(dev->driver);
1272
1273         return drv->probe ? drv->probe(drive) : -ENODEV;
1274 }
1275
1276 static int generic_ide_remove(struct device *dev)
1277 {
1278         ide_drive_t *drive = to_ide_device(dev);
1279         ide_driver_t *drv = to_ide_driver(dev->driver);
1280
1281         if (drv->remove)
1282                 drv->remove(drive);
1283
1284         return 0;
1285 }
1286
1287 static void generic_ide_shutdown(struct device *dev)
1288 {
1289         ide_drive_t *drive = to_ide_device(dev);
1290         ide_driver_t *drv = to_ide_driver(dev->driver);
1291
1292         if (dev->driver && drv->shutdown)
1293                 drv->shutdown(drive);
1294 }
1295
1296 struct bus_type ide_bus_type = {
1297         .name           = "ide",
1298         .match          = ide_bus_match,
1299         .uevent         = ide_uevent,
1300         .probe          = generic_ide_probe,
1301         .remove         = generic_ide_remove,
1302         .shutdown       = generic_ide_shutdown,
1303         .dev_attrs      = ide_dev_attrs,
1304         .suspend        = generic_ide_suspend,
1305         .resume         = generic_ide_resume,
1306 };
1307
1308 EXPORT_SYMBOL_GPL(ide_bus_type);
1309
1310 static void ide_port_class_release(struct device *portdev)
1311 {
1312         ide_hwif_t *hwif = dev_get_drvdata(portdev);
1313
1314         put_device(&hwif->gendev);
1315 }
1316
1317 /*
1318  * This is gets invoked once during initialization, to set *everything* up
1319  */
1320 static int __init ide_init(void)
1321 {
1322         int ret;
1323
1324         printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n");
1325         system_bus_speed = ide_system_bus_speed();
1326
1327         printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
1328                          "for PIO modes%s\n", system_bus_speed,
1329                         idebus_parameter ? "" : "; override with idebus=xx");
1330
1331         ret = bus_register(&ide_bus_type);
1332         if (ret < 0) {
1333                 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1334                 return ret;
1335         }
1336
1337         ide_port_class = class_create(THIS_MODULE, "ide_port");
1338         if (IS_ERR(ide_port_class)) {
1339                 ret = PTR_ERR(ide_port_class);
1340                 goto out_port_class;
1341         }
1342         ide_port_class->dev_release = ide_port_class_release;
1343
1344         init_ide_data();
1345
1346         proc_ide_create();
1347
1348         return 0;
1349
1350 out_port_class:
1351         bus_unregister(&ide_bus_type);
1352
1353         return ret;
1354 }
1355
1356 #ifdef MODULE
1357 static char *options = NULL;
1358 module_param(options, charp, 0);
1359 MODULE_LICENSE("GPL");
1360
1361 static void __init parse_options (char *line)
1362 {
1363         char *next = line;
1364
1365         if (line == NULL || !*line)
1366                 return;
1367         while ((line = next) != NULL) {
1368                 if ((next = strchr(line,' ')) != NULL)
1369                         *next++ = 0;
1370                 if (!ide_setup(line))
1371                         printk (KERN_INFO "Unknown option '%s'\n", line);
1372         }
1373 }
1374
1375 int __init init_module (void)
1376 {
1377         parse_options(options);
1378         return ide_init();
1379 }
1380
1381 void __exit cleanup_module (void)
1382 {
1383         int index;
1384
1385         for (index = 0; index < MAX_HWIFS; ++index)
1386                 ide_unregister(index);
1387
1388         proc_ide_destroy();
1389
1390         class_destroy(ide_port_class);
1391
1392         bus_unregister(&ide_bus_type);
1393 }
1394
1395 #else /* !MODULE */
1396
1397 __setup("", ide_setup);
1398
1399 module_init(ide_init);
1400
1401 #endif /* MODULE */