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

   1 /*
   2  *  Copyright (C) 1994-1998         Linus Torvalds & authors (see below)
   3  *  Copyrifht (C) 2003-2005, 2007   Bartlomiej Zolnierkiewicz
   4  */
   5
   6 /*
   7  *  Mostly written by Mark Lord  <mlord@pobox.com>
   8  *                and Gadi Oxman <gadio@netvision.net.il>
   9  *                and Andre Hedrick <andre@linux-ide.org>
  10  *
  11  *  See linux/MAINTAINERS for address of current maintainer.
  12  *
  13  * This is the multiple IDE interface driver, as evolved from hd.c.
  14  * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs
  15  *   (usually 14 & 15).
  16  * There can be up to two drives per interface, as per the ATA-2 spec.
  17  *
  18  * ...
  19  *
  20  *  From hd.c:
  21  *  |
  22  *  | It traverses the request-list, using interrupts to jump between functions.
  23  *  | As nearly all functions can be called within interrupts, we may not sleep.
  24  *  | Special care is recommended.  Have Fun!
  25  *  |
  26  *  | modified by Drew Eckhardt to check nr of hd's from the CMOS.
  27  *  |
  28  *  | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
  29  *  | in the early extended-partition checks and added DM partitions.
  30  *  |
  31  *  | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
  32  *  |
  33  *  | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
  34  *  | and general streamlining by Mark Lord (mlord@pobox.com).
  35  *
  36  *  October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
  37  *
  38  *      Mark Lord       (mlord@pobox.com)               (IDE Perf.Pkg)
  39  *      Delman Lee      (delman@ieee.org)               ("Mr. atdisk2")
  40  *      Scott Snyder    (snyder@fnald0.fnal.gov)        (ATAPI IDE cd-rom)
  41  *
  42  *  This was a rewrite of just about everything from hd.c, though some original
  43  *  code is still sprinkled about.  Think of it as a major evolution, with
  44  *  inspiration from lots of linux users, esp.  hamish@zot.apana.org.au
  45  */
  46
  47 #define _IDE_C                  /* Tell ide.h it's really us */
  48
  49 #include <linux/module.h>
  50 #include <linux/types.h>
  51 #include <linux/string.h>
  52 #include <linux/kernel.h>
  53 #include <linux/timer.h>
  54 #include <linux/mm.h>
  55 #include <linux/interrupt.h>
  56 #include <linux/major.h>
  57 #include <linux/errno.h>
  58 #include <linux/genhd.h>
  59 #include <linux/blkpg.h>
  60 #include <linux/slab.h>
  61 #include <linux/init.h>
  62 #include <linux/pci.h>
  63 #include <linux/delay.h>
  64 #include <linux/ide.h>
  65 #include <linux/completion.h>
  66 #include <linux/reboot.h>
  67 #include <linux/cdrom.h>
  68 #include <linux/seq_file.h>
  69 #include <linux/device.h>
  70 #include <linux/bitops.h>
  71
  72 #include <asm/byteorder.h>
  73 #include <asm/irq.h>
  74 #include <asm/uaccess.h>
  75 #include <asm/io.h>
  76
  77
  78 /* default maximum number of failures */
  79 #define IDE_DEFAULT_MAX_FAILURES        1
  80
  81 struct class *ide_port_class;
  82
  83 static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
  84                                         IDE2_MAJOR, IDE3_MAJOR,
  85                                         IDE4_MAJOR, IDE5_MAJOR,
  86                                         IDE6_MAJOR, IDE7_MAJOR,
  87                                         IDE8_MAJOR, IDE9_MAJOR };
  88
  89 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 void ide_remove_port_from_hwgroup(ide_hwif_t *hwif)
 281 {
 282         ide_hwgroup_t *hwgroup = hwif->hwgroup;
 283
 284         spin_lock_irq(&ide_lock);
 285         /*
 286          * Remove us from the hwgroup, and free
 287          * the hwgroup if we were the only member
 288          */
 289         if (hwif->next == hwif) {
 290                 BUG_ON(hwgroup->hwif != hwif);
 291                 kfree(hwgroup);
 292         } else {
 293                 /* There is another interface in hwgroup.
 294                  * Unlink us, and set hwgroup->drive and ->hwif to
 295                  * something sane.
 296                  */
 297                 ide_hwif_t *g = hwgroup->hwif;
 298
 299                 while (g->next != hwif)
 300                         g = g->next;
 301                 g->next = hwif->next;
 302                 if (hwgroup->hwif == hwif) {
 303                         /* Chose a random hwif for hwgroup->hwif.
 304                          * It's guaranteed that there are no drives
 305                          * left in the hwgroup.
 306                          */
 307                         BUG_ON(hwgroup->drive != NULL);
 308                         hwgroup->hwif = g;
 309                 }
 310                 BUG_ON(hwgroup->hwif == hwif);
 311         }
 312         spin_unlock_irq(&ide_lock);
 313 }
 314
 315 /* Called with ide_lock held. */
 316 static void __ide_port_unregister_devices(ide_hwif_t *hwif)
 317 {
 318         int i;
 319
 320         for (i = 0; i < MAX_DRIVES; i++) {
 321                 ide_drive_t *drive = &hwif->drives[i];
 322
 323                 if (drive->present) {
 324                         spin_unlock_irq(&ide_lock);
 325                         device_unregister(&drive->gendev);
 326                         wait_for_completion(&drive->gendev_rel_comp);
 327                         spin_lock_irq(&ide_lock);
 328                 }
 329         }
 330 }
 331
 332 void ide_port_unregister_devices(ide_hwif_t *hwif)
 333 {
 334         mutex_lock(&ide_cfg_mtx);
 335         spin_lock_irq(&ide_lock);
 336         __ide_port_unregister_devices(hwif);
 337         hwif->present = 0;
 338         ide_port_init_devices_data(hwif);
 339         spin_unlock_irq(&ide_lock);
 340         mutex_unlock(&ide_cfg_mtx);
 341 }
 342 EXPORT_SYMBOL_GPL(ide_port_unregister_devices);
 343
 344 /**
 345  *      ide_unregister          -       free an IDE interface
 346  *      @index: index of interface (will change soon to a pointer)
 347  *
 348  *      Perform the final unregister of an IDE interface. At the moment
 349  *      we don't refcount interfaces so this will also get split up.
 350  *
 351  *      Locking:
 352  *      The caller must not hold the IDE locks
 353  *      The drive present/vanishing is not yet properly locked
 354  *      Take care with the callbacks. These have been split to avoid
 355  *      deadlocking the IDE layer. The shutdown callback is called
 356  *      before we take the lock and free resources. It is up to the
 357  *      caller to be sure there is no pending I/O here, and that
 358  *      the interface will not be reopened (present/vanishing locking
 359  *      isn't yet done BTW). After we commit to the final kill we
 360  *      call the cleanup callback with the ide locks held.
 361  *
 362  *      Unregister restores the hwif structures to the default state.
 363  *      This is raving bonkers.
 364  */
 365
 366 void ide_unregister(unsigned int index)
 367 {
 368         ide_hwif_t *hwif, *g;
 369         ide_hwgroup_t *hwgroup;
 370         int irq_count = 0;
 371
 372         BUG_ON(index >= MAX_HWIFS);
 373
 374         BUG_ON(in_interrupt());
 375         BUG_ON(irqs_disabled());
 376         mutex_lock(&ide_cfg_mtx);
 377         spin_lock_irq(&ide_lock);
 378         hwif = &ide_hwifs[index];
 379         if (!hwif->present)
 380                 goto abort;
 381         __ide_port_unregister_devices(hwif);
 382         hwif->present = 0;
 383
 384         spin_unlock_irq(&ide_lock);
 385
 386         ide_proc_unregister_port(hwif);
 387
 388         hwgroup = hwif->hwgroup;
 389         /*
 390          * free the irq if we were the only hwif using it
 391          */
 392         g = hwgroup->hwif;
 393         do {
 394                 if (g->irq == hwif->irq)
 395                         ++irq_count;
 396                 g = g->next;
 397         } while (g != hwgroup->hwif);
 398         if (irq_count == 1)
 399                 free_irq(hwif->irq, hwgroup);
 400
 401         ide_remove_port_from_hwgroup(hwif);
 402
 403         device_unregister(hwif->portdev);
 404         device_unregister(&hwif->gendev);
 405         wait_for_completion(&hwif->gendev_rel_comp);
 406
 407         /*
 408          * Remove us from the kernel's knowledge
 409          */
 410         blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
 411         kfree(hwif->sg_table);
 412         unregister_blkdev(hwif->major, hwif->name);
 413         spin_lock_irq(&ide_lock);
 414
 415         if (hwif->dma_base)
 416                 (void)ide_release_dma(hwif);
 417
 418         /* restore hwif data to pristine status */
 419         ide_init_port_data(hwif, index);
 420
 421 abort:
 422         spin_unlock_irq(&ide_lock);
 423         mutex_unlock(&ide_cfg_mtx);
 424 }
 425
 426 EXPORT_SYMBOL(ide_unregister);
 427
 428 void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw)
 429 {
 430         memcpy(hwif->io_ports, hw->io_ports, sizeof(hwif->io_ports));
 431         hwif->irq = hw->irq;
 432         hwif->chipset = hw->chipset;
 433         hwif->gendev.parent = hw->dev;
 434         hwif->ack_intr = hw->ack_intr;
 435 }
 436 EXPORT_SYMBOL_GPL(ide_init_port_hw);
 437
 438 /*
 439  *      Locks for IDE setting functionality
 440  */
 441
 442 DEFINE_MUTEX(ide_setting_mtx);
 443
 444 EXPORT_SYMBOL_GPL(ide_setting_mtx);
 445
 446 /**
 447  *      ide_spin_wait_hwgroup   -       wait for group
 448  *      @drive: drive in the group
 449  *
 450  *      Wait for an IDE device group to go non busy and then return
 451  *      holding the ide_lock which guards the hwgroup->busy status
 452  *      and right to use it.
 453  */
 454
 455 int ide_spin_wait_hwgroup (ide_drive_t *drive)
 456 {
 457         ide_hwgroup_t *hwgroup = HWGROUP(drive);
 458         unsigned long timeout = jiffies + (3 * HZ);
 459
 460         spin_lock_irq(&ide_lock);
 461
 462         while (hwgroup->busy) {
 463                 unsigned long lflags;
 464                 spin_unlock_irq(&ide_lock);
 465                 local_irq_set(lflags);
 466                 if (time_after(jiffies, timeout)) {
 467                         local_irq_restore(lflags);
 468                         printk(KERN_ERR "%s: channel busy\n", drive->name);
 469                         return -EBUSY;
 470                 }
 471                 local_irq_restore(lflags);
 472                 spin_lock_irq(&ide_lock);
 473         }
 474         return 0;
 475 }
 476
 477 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
 478
 479 int set_io_32bit(ide_drive_t *drive, int arg)
 480 {
 481         if (drive->no_io_32bit)
 482                 return -EPERM;
 483
 484         if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
 485                 return -EINVAL;
 486
 487         if (ide_spin_wait_hwgroup(drive))
 488                 return -EBUSY;
 489
 490         drive->io_32bit = arg;
 491
 492         spin_unlock_irq(&ide_lock);
 493
 494         return 0;
 495 }
 496
 497 static int set_ksettings(ide_drive_t *drive, int arg)
 498 {
 499         if (arg < 0 || arg > 1)
 500                 return -EINVAL;
 501
 502         if (ide_spin_wait_hwgroup(drive))
 503                 return -EBUSY;
 504         drive->keep_settings = arg;
 505         spin_unlock_irq(&ide_lock);
 506
 507         return 0;
 508 }
 509
 510 int set_using_dma(ide_drive_t *drive, int arg)
 511 {
 512 #ifdef CONFIG_BLK_DEV_IDEDMA
 513         ide_hwif_t *hwif = drive->hwif;
 514         int err = -EPERM;
 515
 516         if (arg < 0 || arg > 1)
 517                 return -EINVAL;
 518
 519         if (!drive->id || !(drive->id->capability & 1))
 520                 goto out;
 521
 522         if (hwif->dma_host_set == NULL)
 523                 goto out;
 524
 525         err = -EBUSY;
 526         if (ide_spin_wait_hwgroup(drive))
 527                 goto out;
 528         /*
 529          * set ->busy flag, unlock and let it ride
 530          */
 531         hwif->hwgroup->busy = 1;
 532         spin_unlock_irq(&ide_lock);
 533
 534         err = 0;
 535
 536         if (arg) {
 537                 if (ide_set_dma(drive))
 538                         err = -EIO;
 539         } else
 540                 ide_dma_off(drive);
 541
 542         /*
 543          * lock, clear ->busy flag and unlock before leaving
 544          */
 545         spin_lock_irq(&ide_lock);
 546         hwif->hwgroup->busy = 0;
 547         spin_unlock_irq(&ide_lock);
 548 out:
 549         return err;
 550 #else
 551         if (arg < 0 || arg > 1)
 552                 return -EINVAL;
 553
 554         return -EPERM;
 555 #endif
 556 }
 557
 558 int set_pio_mode(ide_drive_t *drive, int arg)
 559 {
 560         struct request rq;
 561         ide_hwif_t *hwif = drive->hwif;
 562         const struct ide_port_ops *port_ops = hwif->port_ops;
 563
 564         if (arg < 0 || arg > 255)
 565                 return -EINVAL;
 566
 567         if (port_ops == NULL || port_ops->set_pio_mode == NULL ||
 568             (hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
 569                 return -ENOSYS;
 570
 571         if (drive->special.b.set_tune)
 572                 return -EBUSY;
 573
 574         ide_init_drive_cmd(&rq);
 575         rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
 576
 577         drive->tune_req = (u8) arg;
 578         drive->special.b.set_tune = 1;
 579         (void) ide_do_drive_cmd(drive, &rq, ide_wait);
 580         return 0;
 581 }
 582
 583 static int set_unmaskirq(ide_drive_t *drive, int arg)
 584 {
 585         if (drive->no_unmask)
 586                 return -EPERM;
 587
 588         if (arg < 0 || arg > 1)
 589                 return -EINVAL;
 590
 591         if (ide_spin_wait_hwgroup(drive))
 592                 return -EBUSY;
 593         drive->unmask = arg;
 594         spin_unlock_irq(&ide_lock);
 595
 596         return 0;
 597 }
 598
 599 /**
 600  *      system_bus_clock        -       clock guess
 601  *
 602  *      External version of the bus clock guess used by very old IDE drivers
 603  *      for things like VLB timings. Should not be used.
 604  */
 605
 606 int system_bus_clock (void)
 607 {
 608         return system_bus_speed;
 609 }
 610
 611 EXPORT_SYMBOL(system_bus_clock);
 612
 613 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
 614 {
 615         ide_drive_t *drive = dev->driver_data;
 616         ide_hwif_t *hwif = HWIF(drive);
 617         struct request rq;
 618         struct request_pm_state rqpm;
 619         ide_task_t args;
 620         int ret;
 621
 622         /* Call ACPI _GTM only once */
 623         if (!(drive->dn % 2))
 624                 ide_acpi_get_timing(hwif);
 625
 626         memset(&rq, 0, sizeof(rq));
 627         memset(&rqpm, 0, sizeof(rqpm));
 628         memset(&args, 0, sizeof(args));
 629         rq.cmd_type = REQ_TYPE_PM_SUSPEND;
 630         rq.special = &args;
 631         rq.data = &rqpm;
 632         rqpm.pm_step = ide_pm_state_start_suspend;
 633         if (mesg.event == PM_EVENT_PRETHAW)
 634                 mesg.event = PM_EVENT_FREEZE;
 635         rqpm.pm_state = mesg.event;
 636
 637         ret = ide_do_drive_cmd(drive, &rq, ide_wait);
 638         /* only call ACPI _PS3 after both drivers are suspended */
 639         if (!ret && (((drive->dn % 2) && hwif->drives[0].present
 640                  && hwif->drives[1].present)
 641                  || !hwif->drives[0].present
 642                  || !hwif->drives[1].present))
 643                 ide_acpi_set_state(hwif, 0);
 644         return ret;
 645 }
 646
 647 static int generic_ide_resume(struct device *dev)
 648 {
 649         ide_drive_t *drive = dev->driver_data;
 650         ide_hwif_t *hwif = HWIF(drive);
 651         struct request rq;
 652         struct request_pm_state rqpm;
 653         ide_task_t args;
 654         int err;
 655
 656         /* Call ACPI _STM only once */
 657         if (!(drive->dn % 2)) {
 658                 ide_acpi_set_state(hwif, 1);
 659                 ide_acpi_push_timing(hwif);
 660         }
 661
 662         ide_acpi_exec_tfs(drive);
 663
 664         memset(&rq, 0, sizeof(rq));
 665         memset(&rqpm, 0, sizeof(rqpm));
 666         memset(&args, 0, sizeof(args));
 667         rq.cmd_type = REQ_TYPE_PM_RESUME;
 668         rq.special = &args;
 669         rq.data = &rqpm;
 670         rqpm.pm_step = ide_pm_state_start_resume;
 671         rqpm.pm_state = PM_EVENT_ON;
 672
 673         err = ide_do_drive_cmd(drive, &rq, ide_head_wait);
 674
 675         if (err == 0 && dev->driver) {
 676                 ide_driver_t *drv = to_ide_driver(dev->driver);
 677
 678                 if (drv->resume)
 679                         drv->resume(drive);
 680         }
 681
 682         return err;
 683 }
 684
 685 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
 686                         unsigned int cmd, unsigned long arg)
 687 {
 688         unsigned long flags;
 689         ide_driver_t *drv;
 690         void __user *p = (void __user *)arg;
 691         int err = 0, (*setfunc)(ide_drive_t *, int);
 692         u8 *val;
 693
 694         switch (cmd) {
 695         case HDIO_GET_32BIT:        val = &drive->io_32bit;      goto read_val;
 696         case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
 697         case HDIO_GET_UNMASKINTR:   val = &drive->unmask;        goto read_val;
 698         case HDIO_GET_DMA:          val = &drive->using_dma;     goto read_val;
 699         case HDIO_SET_32BIT:        setfunc = set_io_32bit;      goto set_val;
 700         case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings;     goto set_val;
 701         case HDIO_SET_PIO_MODE:     setfunc = set_pio_mode;      goto set_val;
 702         case HDIO_SET_UNMASKINTR:   setfunc = set_unmaskirq;     goto set_val;
 703         case HDIO_SET_DMA:          setfunc = set_using_dma;     goto set_val;
 704         }
 705
 706         switch (cmd) {
 707                 case HDIO_OBSOLETE_IDENTITY:
 708                 case HDIO_GET_IDENTITY:
 709                         if (bdev != bdev->bd_contains)
 710                                 return -EINVAL;
 711                         if (drive->id_read == 0)
 712                                 return -ENOMSG;
 713                         if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
 714                                 return -EFAULT;
 715                         return 0;
 716
 717                 case HDIO_GET_NICE:
 718                         return put_user(drive->dsc_overlap      <<      IDE_NICE_DSC_OVERLAP    |
 719                                         drive->atapi_overlap    <<      IDE_NICE_ATAPI_OVERLAP  |
 720                                         drive->nice1 << IDE_NICE_1,
 721                                         (long __user *) arg);
 722 #ifdef CONFIG_IDE_TASK_IOCTL
 723                 case HDIO_DRIVE_TASKFILE:
 724                         if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
 725                                 return -EACCES;
 726                         switch(drive->media) {
 727                                 case ide_disk:
 728                                         return ide_taskfile_ioctl(drive, cmd, arg);
 729                                 default:
 730                                         return -ENOMSG;
 731                         }
 732 #endif /* CONFIG_IDE_TASK_IOCTL */
 733
 734                 case HDIO_DRIVE_CMD:
 735                         if (!capable(CAP_SYS_RAWIO))
 736                                 return -EACCES;
 737                         return ide_cmd_ioctl(drive, cmd, arg);
 738
 739                 case HDIO_DRIVE_TASK:
 740                         if (!capable(CAP_SYS_RAWIO))
 741                                 return -EACCES;
 742                         return ide_task_ioctl(drive, cmd, arg);
 743                 case HDIO_SET_NICE:
 744                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
 745                         if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
 746                                 return -EPERM;
 747                         drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
 748                         drv = *(ide_driver_t **)bdev->bd_disk->private_data;
 749                         if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
 750                                 drive->dsc_overlap = 0;
 751                                 return -EPERM;
 752                         }
 753                         drive->nice1 = (arg >> IDE_NICE_1) & 1;
 754                         return 0;
 755                 case HDIO_DRIVE_RESET:
 756                         if (!capable(CAP_SYS_ADMIN))
 757                                 return -EACCES;
 758
 759                         /*
 760                          *      Abort the current command on the
 761                          *      group if there is one, taking
 762                          *      care not to allow anything else
 763                          *      to be queued and to die on the
 764                          *      spot if we miss one somehow
 765                          */
 766
 767                         spin_lock_irqsave(&ide_lock, flags);
 768
 769                         if (HWGROUP(drive)->resetting) {
 770                                 spin_unlock_irqrestore(&ide_lock, flags);
 771                                 return -EBUSY;
 772                         }
 773
 774                         ide_abort(drive, "drive reset");
 775
 776                         BUG_ON(HWGROUP(drive)->handler);
 777
 778                         /* Ensure nothing gets queued after we
 779                            drop the lock. Reset will clear the busy */
 780
 781                         HWGROUP(drive)->busy = 1;
 782                         spin_unlock_irqrestore(&ide_lock, flags);
 783                         (void) ide_do_reset(drive);
 784
 785                         return 0;
 786                 case HDIO_GET_BUSSTATE:
 787                         if (!capable(CAP_SYS_ADMIN))
 788                                 return -EACCES;
 789                         if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
 790                                 return -EFAULT;
 791                         return 0;
 792
 793                 case HDIO_SET_BUSSTATE:
 794                         if (!capable(CAP_SYS_ADMIN))
 795                                 return -EACCES;
 796                         return -EOPNOTSUPP;
 797                 default:
 798                         return -EINVAL;
 799         }
 800
 801 read_val:
 802         mutex_lock(&ide_setting_mtx);
 803         spin_lock_irqsave(&ide_lock, flags);
 804         err = *val;
 805         spin_unlock_irqrestore(&ide_lock, flags);
 806         mutex_unlock(&ide_setting_mtx);
 807         return err >= 0 ? put_user(err, (long __user *)arg) : err;
 808
 809 set_val:
 810         if (bdev != bdev->bd_contains)
 811                 err = -EINVAL;
 812         else {
 813                 if (!capable(CAP_SYS_ADMIN))
 814                         err = -EACCES;
 815                 else {
 816                         mutex_lock(&ide_setting_mtx);
 817                         err = setfunc(drive, arg);
 818                         mutex_unlock(&ide_setting_mtx);
 819                 }
 820         }
 821         return err;
 822 }
 823
 824 EXPORT_SYMBOL(generic_ide_ioctl);
 825
 826 /*
 827  * stridx() returns the offset of c within s,
 828  * or -1 if c is '\0' or not found within s.
 829  */
 830 static int __init stridx (const char *s, char c)
 831 {
 832         char *i = strchr(s, c);
 833         return (i && c) ? i - s : -1;
 834 }
 835
 836 /*
 837  * match_parm() does parsing for ide_setup():
 838  *
 839  * 1. the first char of s must be '='.
 840  * 2. if the remainder matches one of the supplied keywords,
 841  *     the index (1 based) of the keyword is negated and returned.
 842  * 3. if the remainder is a series of no more than max_vals numbers
 843  *     separated by commas, the numbers are saved in vals[] and a
 844  *     count of how many were saved is returned.  Base10 is assumed,
 845  *     and base16 is allowed when prefixed with "0x".
 846  * 4. otherwise, zero is returned.
 847  */
 848 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
 849 {
 850         static const char *decimal = "0123456789";
 851         static const char *hex = "0123456789abcdef";
 852         int i, n;
 853
 854         if (*s++ == '=') {
 855                 /*
 856                  * Try matching against the supplied keywords,
 857                  * and return -(index+1) if we match one
 858                  */
 859                 if (keywords != NULL) {
 860                         for (i = 0; *keywords != NULL; ++i) {
 861                                 if (!strcmp(s, *keywords++))
 862                                         return -(i+1);
 863                         }
 864                 }
 865                 /*
 866                  * Look for a series of no more than "max_vals"
 867                  * numeric values separated by commas, in base10,
 868                  * or base16 when prefixed with "0x".
 869                  * Return a count of how many were found.
 870                  */
 871                 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
 872                         vals[n] = i;
 873                         while ((i = stridx(decimal, *++s)) >= 0)
 874                                 vals[n] = (vals[n] * 10) + i;
 875                         if (*s == 'x' && !vals[n]) {
 876                                 while ((i = stridx(hex, *++s)) >= 0)
 877                                         vals[n] = (vals[n] * 0x10) + i;
 878                         }
 879                         if (++n == max_vals)
 880                                 break;
 881                         if (*s == ',' || *s == ';')
 882                                 ++s;
 883                 }
 884                 if (!*s)
 885                         return n;
 886         }
 887         return 0;       /* zero = nothing matched */
 888 }
 889
 890 extern int probe_ali14xx;
 891 extern int probe_umc8672;
 892 extern int probe_dtc2278;
 893 extern int probe_ht6560b;
 894 extern int probe_qd65xx;
 895 extern int cmd640_vlb;
 896 extern int probe_4drives;
 897
 898 static int __initdata is_chipset_set;
 899
 900 /*
 901  * ide_setup() gets called VERY EARLY during initialization,
 902  * to handle kernel "command line" strings beginning with "hdx=" or "ide".
 903  *
 904  * Remember to update Documentation/ide/ide.txt if you change something here.
 905  */
 906 static int __init ide_setup(char *s)
 907 {
 908         int i, vals[3];
 909         ide_hwif_t *hwif;
 910         ide_drive_t *drive;
 911         unsigned int hw, unit;
 912         const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
 913         const char max_hwif  = '0' + (MAX_HWIFS - 1);
 914
 915
 916         if (strncmp(s,"hd",2) == 0 && s[2] == '=')      /* hd= is for hd.c   */
 917                 return 0;                               /* driver and not us */
 918
 919         if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
 920                 return 0;
 921
 922         printk(KERN_INFO "ide_setup: %s", s);
 923         init_ide_data ();
 924
 925 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
 926         if (!strcmp(s, "ide=doubler")) {
 927                 extern int ide_doubler;
 928
 929                 printk(" : Enabled support for IDE doublers\n");
 930                 ide_doubler = 1;
 931                 return 1;
 932         }
 933 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
 934
 935         if (!strcmp(s, "ide=nodma")) {
 936                 printk(" : Prevented DMA\n");
 937                 noautodma = 1;
 938                 goto obsolete_option;
 939         }
 940
 941 #ifdef CONFIG_BLK_DEV_IDEACPI
 942         if (!strcmp(s, "ide=noacpi")) {
 943                 //printk(" : Disable IDE ACPI support.\n");
 944                 ide_noacpi = 1;
 945                 return 1;
 946         }
 947         if (!strcmp(s, "ide=acpigtf")) {
 948                 //printk(" : Enable IDE ACPI _GTF support.\n");
 949                 ide_noacpitfs = 0;
 950                 return 1;
 951         }
 952         if (!strcmp(s, "ide=acpionboot")) {
 953                 //printk(" : Call IDE ACPI methods on boot.\n");
 954                 ide_noacpionboot = 0;
 955                 return 1;
 956         }
 957 #endif /* CONFIG_BLK_DEV_IDEACPI */
 958
 959         /*
 960          * Look for drive options:  "hdx="
 961          */
 962         if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
 963                 const char *hd_words[] = {
 964                         "none", "noprobe", "nowerr", "cdrom", "nodma",
 965                         "autotune", "noautotune", "-8", "-9", "-10",
 966                         "noflush", "remap", "remap63", "scsi", NULL };
 967                 unit = s[2] - 'a';
 968                 hw   = unit / MAX_DRIVES;
 969                 unit = unit % MAX_DRIVES;
 970                 hwif = &ide_hwifs[hw];
 971                 drive = &hwif->drives[unit];
 972                 if (strncmp(s + 4, "ide-", 4) == 0) {
 973                         strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
 974                         goto obsolete_option;
 975                 }
 976                 switch (match_parm(&s[3], hd_words, vals, 3)) {
 977                         case -1: /* "none" */
 978                         case -2: /* "noprobe" */
 979                                 drive->noprobe = 1;
 980                                 goto done;
 981                         case -3: /* "nowerr" */
 982                                 drive->bad_wstat = BAD_R_STAT;
 983                                 goto done;
 984                         case -4: /* "cdrom" */
 985                                 drive->present = 1;
 986                                 drive->media = ide_cdrom;
 987                                 /* an ATAPI device ignores DRDY */
 988                                 drive->ready_stat = 0;
 989                                 goto done;
 990                         case -5: /* nodma */
 991                                 drive->nodma = 1;
 992                                 goto done;
 993                         case -6: /* "autotune" */
 994                                 drive->autotune = IDE_TUNE_AUTO;
 995                                 goto obsolete_option;
 996                         case -7: /* "noautotune" */
 997                                 drive->autotune = IDE_TUNE_NOAUTO;
 998                                 goto obsolete_option;
 999                         case -11: /* noflush */
1000                                 drive->noflush = 1;
1001                                 goto done;
1002                         case -12: /* "remap" */
1003                                 drive->remap_0_to_1 = 1;
1004                                 goto obsolete_option;
1005                         case -13: /* "remap63" */
1006                                 drive->sect0 = 63;
1007                                 goto obsolete_option;
1008                         case -14: /* "scsi" */
1009                                 drive->scsi = 1;
1010                                 goto obsolete_option;
1011                         case 3: /* cyl,head,sect */
1012                                 drive->media    = ide_disk;
1013                                 drive->ready_stat = READY_STAT;
1014                                 drive->cyl      = drive->bios_cyl  = vals[0];
1015                                 drive->head     = drive->bios_head = vals[1];
1016                                 drive->sect     = drive->bios_sect = vals[2];
1017                                 drive->present  = 1;
1018                                 drive->forced_geom = 1;
1019                                 goto done;
1020                         default:
1021                                 goto bad_option;
1022                 }
1023         }
1024
1025         if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1026                 goto bad_option;
1027         /*
1028          * Look for bus speed option:  "idebus="
1029          */
1030         if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1031                 if (match_parm(&s[6], NULL, vals, 1) != 1)
1032                         goto bad_option;
1033                 if (vals[0] >= 20 && vals[0] <= 66) {
1034                         idebus_parameter = vals[0];
1035                 } else
1036                         printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1037                 goto done;
1038         }
1039         /*
1040          * Look for interface options:  "idex="
1041          */
1042         if (s[3] >= '0' && s[3] <= max_hwif) {
1043                 /*
1044                  * Be VERY CAREFUL changing this: note hardcoded indexes below
1045                  * (-8, -9, -10) are reserved to ease the hardcoding.
1046                  */
1047                 static const char *ide_words[] = {
1048                         "minus1", "serialize", "minus3", "minus4",
1049                         "reset", "minus6", "ata66", "minus8", "minus9",
1050                         "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1051                         "dtc2278", "umc8672", "ali14xx", NULL };
1052
1053                 hw = s[3] - '0';
1054                 hwif = &ide_hwifs[hw];
1055                 i = match_parm(&s[4], ide_words, vals, 3);
1056
1057                 /*
1058                  * Cryptic check to ensure chipset not already set for hwif.
1059                  * Note: we can't depend on hwif->chipset here.
1060                  */
1061                 if (i >= -18 && i <= -11) {
1062                         /* chipset already specified */
1063                         if (is_chipset_set)
1064                                 goto bad_option;
1065                         /* these drivers are for "ide0=" only */
1066                         if (hw != 0)
1067                                 goto bad_hwif;
1068                         is_chipset_set = 1;
1069                         printk("\n");
1070                 }
1071
1072                 switch (i) {
1073 #ifdef CONFIG_BLK_DEV_ALI14XX
1074                         case -17: /* "ali14xx" */
1075                                 probe_ali14xx = 1;
1076                                 goto obsolete_option;
1077 #endif
1078 #ifdef CONFIG_BLK_DEV_UMC8672
1079                         case -16: /* "umc8672" */
1080                                 probe_umc8672 = 1;
1081                                 goto obsolete_option;
1082 #endif
1083 #ifdef CONFIG_BLK_DEV_DTC2278
1084                         case -15: /* "dtc2278" */
1085                                 probe_dtc2278 = 1;
1086                                 goto obsolete_option;
1087 #endif
1088 #ifdef CONFIG_BLK_DEV_CMD640
1089                         case -14: /* "cmd640_vlb" */
1090                                 cmd640_vlb = 1;
1091                                 goto obsolete_option;
1092 #endif
1093 #ifdef CONFIG_BLK_DEV_HT6560B
1094                         case -13: /* "ht6560b" */
1095                                 probe_ht6560b = 1;
1096                                 goto obsolete_option;
1097 #endif
1098 #ifdef CONFIG_BLK_DEV_QD65XX
1099                         case -12: /* "qd65xx" */
1100                                 probe_qd65xx = 1;
1101                                 goto obsolete_option;
1102 #endif
1103 #ifdef CONFIG_BLK_DEV_4DRIVES
1104                         case -11: /* "four" drives on one set of ports */
1105                                 probe_4drives = 1;
1106                                 goto obsolete_option;
1107 #endif
1108                         case -10: /* minus10 */
1109                         case -9: /* minus9 */
1110                         case -8: /* minus8 */
1111                         case -6:
1112                         case -4:
1113                         case -3:
1114                                 goto bad_option;
1115                         case -7: /* ata66 */
1116 #ifdef CONFIG_BLK_DEV_IDEPCI
1117                                 /*
1118                                  * Use ATA_CBL_PATA40_SHORT so drive side
1119                                  * cable detection is also overriden.
1120                                  */
1121                                 hwif->cbl = ATA_CBL_PATA40_SHORT;
1122                                 goto obsolete_option;
1123 #else
1124                                 goto bad_hwif;
1125 #endif
1126                         case -5: /* "reset" */
1127                                 hwif->reset = 1;
1128                                 goto obsolete_option;
1129                         case -2: /* "serialize" */
1130                                 hwif->mate = &ide_hwifs[hw^1];
1131                                 hwif->mate->mate = hwif;
1132                                 hwif->serialized = hwif->mate->serialized = 1;
1133                                 goto obsolete_option;
1134
1135                         case -1:
1136                         case 0:
1137                         case 1:
1138                         case 2:
1139                         case 3:
1140                                 goto bad_option;
1141                         default:
1142                                 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1143                                 return 1;
1144                 }
1145         }
1146 bad_option:
1147         printk(" -- BAD OPTION\n");
1148         return 1;
1149 obsolete_option:
1150         printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1151         return 1;
1152 bad_hwif:
1153         printk("-- NOT SUPPORTED ON ide%d", hw);
1154 done:
1155         printk("\n");
1156         return 1;
1157 }
1158
1159 EXPORT_SYMBOL(ide_lock);
1160
1161 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1162 {
1163         return 1;
1164 }
1165
1166 static char *media_string(ide_drive_t *drive)
1167 {
1168         switch (drive->media) {
1169         case ide_disk:
1170                 return "disk";
1171         case ide_cdrom:
1172                 return "cdrom";
1173         case ide_tape:
1174                 return "tape";
1175         case ide_floppy:
1176                 return "floppy";
1177         case ide_optical:
1178                 return "optical";
1179         default:
1180                 return "UNKNOWN";
1181         }
1182 }
1183
1184 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1185 {
1186         ide_drive_t *drive = to_ide_device(dev);
1187         return sprintf(buf, "%s\n", media_string(drive));
1188 }
1189
1190 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1191 {
1192         ide_drive_t *drive = to_ide_device(dev);
1193         return sprintf(buf, "%s\n", drive->name);
1194 }
1195
1196 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1197 {
1198         ide_drive_t *drive = to_ide_device(dev);
1199         return sprintf(buf, "ide:m-%s\n", media_string(drive));
1200 }
1201
1202 static ssize_t model_show(struct device *dev, struct device_attribute *attr,
1203                           char *buf)
1204 {
1205         ide_drive_t *drive = to_ide_device(dev);
1206         return sprintf(buf, "%s\n", drive->id->model);
1207 }
1208
1209 static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
1210                              char *buf)
1211 {
1212         ide_drive_t *drive = to_ide_device(dev);
1213         return sprintf(buf, "%s\n", drive->id->fw_rev);
1214 }
1215
1216 static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
1217                            char *buf)
1218 {
1219         ide_drive_t *drive = to_ide_device(dev);
1220         return sprintf(buf, "%s\n", drive->id->serial_no);
1221 }
1222
1223 static struct device_attribute ide_dev_attrs[] = {
1224         __ATTR_RO(media),
1225         __ATTR_RO(drivename),
1226         __ATTR_RO(modalias),
1227         __ATTR_RO(model),
1228         __ATTR_RO(firmware),
1229         __ATTR(serial, 0400, serial_show, NULL),
1230         __ATTR_NULL
1231 };
1232
1233 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
1234 {
1235         ide_drive_t *drive = to_ide_device(dev);
1236
1237         add_uevent_var(env, "MEDIA=%s", media_string(drive));
1238         add_uevent_var(env, "DRIVENAME=%s", drive->name);
1239         add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
1240         return 0;
1241 }
1242
1243 static int generic_ide_probe(struct device *dev)
1244 {
1245         ide_drive_t *drive = to_ide_device(dev);
1246         ide_driver_t *drv = to_ide_driver(dev->driver);
1247
1248         return drv->probe ? drv->probe(drive) : -ENODEV;
1249 }
1250
1251 static int generic_ide_remove(struct device *dev)
1252 {
1253         ide_drive_t *drive = to_ide_device(dev);
1254         ide_driver_t *drv = to_ide_driver(dev->driver);
1255
1256         if (drv->remove)
1257                 drv->remove(drive);
1258
1259         return 0;
1260 }
1261
1262 static void generic_ide_shutdown(struct device *dev)
1263 {
1264         ide_drive_t *drive = to_ide_device(dev);
1265         ide_driver_t *drv = to_ide_driver(dev->driver);
1266
1267         if (dev->driver && drv->shutdown)
1268                 drv->shutdown(drive);
1269 }
1270
1271 struct bus_type ide_bus_type = {
1272         .name           = "ide",
1273         .match          = ide_bus_match,
1274         .uevent         = ide_uevent,
1275         .probe          = generic_ide_probe,
1276         .remove         = generic_ide_remove,
1277         .shutdown       = generic_ide_shutdown,
1278         .dev_attrs      = ide_dev_attrs,
1279         .suspend        = generic_ide_suspend,
1280         .resume         = generic_ide_resume,
1281 };
1282
1283 EXPORT_SYMBOL_GPL(ide_bus_type);
1284
1285 static void ide_port_class_release(struct device *portdev)
1286 {
1287         ide_hwif_t *hwif = dev_get_drvdata(portdev);
1288
1289         put_device(&hwif->gendev);
1290 }
1291
1292 /*
1293  * This is gets invoked once during initialization, to set *everything* up
1294  */
1295 static int __init ide_init(void)
1296 {
1297         int ret;
1298
1299         printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n");
1300         system_bus_speed = ide_system_bus_speed();
1301
1302         printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
1303                          "for PIO modes%s\n", system_bus_speed,
1304                         idebus_parameter ? "" : "; override with idebus=xx");
1305
1306         ret = bus_register(&ide_bus_type);
1307         if (ret < 0) {
1308                 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1309                 return ret;
1310         }
1311
1312         ide_port_class = class_create(THIS_MODULE, "ide_port");
1313         if (IS_ERR(ide_port_class)) {
1314                 ret = PTR_ERR(ide_port_class);
1315                 goto out_port_class;
1316         }
1317         ide_port_class->dev_release = ide_port_class_release;
1318
1319         init_ide_data();
1320
1321         proc_ide_create();
1322
1323         return 0;
1324
1325 out_port_class:
1326         bus_unregister(&ide_bus_type);
1327
1328         return ret;
1329 }
1330
1331 #ifdef MODULE
1332 static char *options = NULL;
1333 module_param(options, charp, 0);
1334 MODULE_LICENSE("GPL");
1335
1336 static void __init parse_options (char *line)
1337 {
1338         char *next = line;
1339
1340         if (line == NULL || !*line)
1341                 return;
1342         while ((line = next) != NULL) {
1343                 if ((next = strchr(line,' ')) != NULL)
1344                         *next++ = 0;
1345                 if (!ide_setup(line))
1346                         printk (KERN_INFO "Unknown option '%s'\n", line);
1347         }
1348 }
1349
1350 int __init init_module (void)
1351 {
1352         parse_options(options);
1353         return ide_init();
1354 }
1355
1356 void __exit cleanup_module (void)
1357 {
1358         int index;
1359
1360         for (index = 0; index < MAX_HWIFS; ++index)
1361                 ide_unregister(index);
1362
1363         proc_ide_destroy();
1364
1365         class_destroy(ide_port_class);
1366
1367         bus_unregister(&ide_bus_type);
1368 }
1369
1370 #else /* !MODULE */
1371
1372 __setup("", ide_setup);
1373
1374 module_init(ide_init);
1375
1376 #endif /* MODULE */