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         unsigned int i;
 255
 256         if (hwif->mmio)
 257                 return 0;
 258         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
 259         if (addr && !hwif_request_region(hwif, addr, 1))
 260                 goto control_region_busy;
 261         hwif->straight8 = 0;
 262         addr = hwif->io_ports[IDE_DATA_OFFSET];
 263         if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
 264                 if (!hwif_request_region(hwif, addr, 8))
 265                         goto data_region_busy;
 266                 hwif->straight8 = 1;
 267                 return 0;
 268         }
 269         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
 270                 addr = hwif->io_ports[i];
 271                 if (!hwif_request_region(hwif, addr, 1)) {
 272                         while (--i)
 273                                 release_region(addr, 1);
 274                         goto data_region_busy;
 275                 }
 276         }
 277         return 0;
 278
 279 data_region_busy:
 280         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
 281         if (addr)
 282                 release_region(addr, 1);
 283 control_region_busy:
 284         /* If any errors are return, we drop the hwif interface. */
 285         return -EBUSY;
 286 }
 287
 288 /**
 289  *      ide_hwif_release_regions - free IDE resources
 290  *
 291  *      Note that we only release the standard ports,
 292  *      and do not even try to handle any extra ports
 293  *      allocated for weird IDE interface chipsets.
 294  *
 295  *      Note also that we don't yet handle mmio resources here. More
 296  *      importantly our caller should be doing this so we need to
 297  *      restructure this as a helper function for drivers.
 298  */
 299
 300 void ide_hwif_release_regions(ide_hwif_t *hwif)
 301 {
 302         u32 i = 0;
 303
 304         if (hwif->mmio)
 305                 return;
 306         if (hwif->io_ports[IDE_CONTROL_OFFSET])
 307                 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
 308         if (hwif->straight8) {
 309                 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
 310                 return;
 311         }
 312         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
 313                 if (hwif->io_ports[i])
 314                         release_region(hwif->io_ports[i], 1);
 315 }
 316
 317 void ide_remove_port_from_hwgroup(ide_hwif_t *hwif)
 318 {
 319         ide_hwgroup_t *hwgroup = hwif->hwgroup;
 320
 321         spin_lock_irq(&ide_lock);
 322         /*
 323          * Remove us from the hwgroup, and free
 324          * the hwgroup if we were the only member
 325          */
 326         if (hwif->next == hwif) {
 327                 BUG_ON(hwgroup->hwif != hwif);
 328                 kfree(hwgroup);
 329         } else {
 330                 /* There is another interface in hwgroup.
 331                  * Unlink us, and set hwgroup->drive and ->hwif to
 332                  * something sane.
 333                  */
 334                 ide_hwif_t *g = hwgroup->hwif;
 335
 336                 while (g->next != hwif)
 337                         g = g->next;
 338                 g->next = hwif->next;
 339                 if (hwgroup->hwif == hwif) {
 340                         /* Chose a random hwif for hwgroup->hwif.
 341                          * It's guaranteed that there are no drives
 342                          * left in the hwgroup.
 343                          */
 344                         BUG_ON(hwgroup->drive != NULL);
 345                         hwgroup->hwif = g;
 346                 }
 347                 BUG_ON(hwgroup->hwif == hwif);
 348         }
 349         spin_unlock_irq(&ide_lock);
 350 }
 351
 352 /* Called with ide_lock held. */
 353 static void __ide_port_unregister_devices(ide_hwif_t *hwif)
 354 {
 355         int i;
 356
 357         for (i = 0; i < MAX_DRIVES; i++) {
 358                 ide_drive_t *drive = &hwif->drives[i];
 359
 360                 if (drive->present) {
 361                         spin_unlock_irq(&ide_lock);
 362                         device_unregister(&drive->gendev);
 363                         wait_for_completion(&drive->gendev_rel_comp);
 364                         spin_lock_irq(&ide_lock);
 365                 }
 366         }
 367 }
 368
 369 void ide_port_unregister_devices(ide_hwif_t *hwif)
 370 {
 371         mutex_lock(&ide_cfg_mtx);
 372         spin_lock_irq(&ide_lock);
 373         __ide_port_unregister_devices(hwif);
 374         hwif->present = 0;
 375         ide_port_init_devices_data(hwif);
 376         spin_unlock_irq(&ide_lock);
 377         mutex_unlock(&ide_cfg_mtx);
 378 }
 379 EXPORT_SYMBOL_GPL(ide_port_unregister_devices);
 380
 381 /**
 382  *      ide_unregister          -       free an IDE interface
 383  *      @index: index of interface (will change soon to a pointer)
 384  *
 385  *      Perform the final unregister of an IDE interface. At the moment
 386  *      we don't refcount interfaces so this will also get split up.
 387  *
 388  *      Locking:
 389  *      The caller must not hold the IDE locks
 390  *      The drive present/vanishing is not yet properly locked
 391  *      Take care with the callbacks. These have been split to avoid
 392  *      deadlocking the IDE layer. The shutdown callback is called
 393  *      before we take the lock and free resources. It is up to the
 394  *      caller to be sure there is no pending I/O here, and that
 395  *      the interface will not be reopened (present/vanishing locking
 396  *      isn't yet done BTW). After we commit to the final kill we
 397  *      call the cleanup callback with the ide locks held.
 398  *
 399  *      Unregister restores the hwif structures to the default state.
 400  *      This is raving bonkers.
 401  */
 402
 403 void ide_unregister(unsigned int index)
 404 {
 405         ide_hwif_t *hwif, *g;
 406         ide_hwgroup_t *hwgroup;
 407         int irq_count = 0;
 408
 409         BUG_ON(index >= MAX_HWIFS);
 410
 411         BUG_ON(in_interrupt());
 412         BUG_ON(irqs_disabled());
 413         mutex_lock(&ide_cfg_mtx);
 414         spin_lock_irq(&ide_lock);
 415         hwif = &ide_hwifs[index];
 416         if (!hwif->present)
 417                 goto abort;
 418         __ide_port_unregister_devices(hwif);
 419         hwif->present = 0;
 420
 421         spin_unlock_irq(&ide_lock);
 422
 423         ide_proc_unregister_port(hwif);
 424
 425         hwgroup = hwif->hwgroup;
 426         /*
 427          * free the irq if we were the only hwif using it
 428          */
 429         g = hwgroup->hwif;
 430         do {
 431                 if (g->irq == hwif->irq)
 432                         ++irq_count;
 433                 g = g->next;
 434         } while (g != hwgroup->hwif);
 435         if (irq_count == 1)
 436                 free_irq(hwif->irq, hwgroup);
 437
 438         ide_remove_port_from_hwgroup(hwif);
 439
 440         device_unregister(hwif->portdev);
 441         device_unregister(&hwif->gendev);
 442         wait_for_completion(&hwif->gendev_rel_comp);
 443
 444         /*
 445          * Remove us from the kernel's knowledge
 446          */
 447         blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
 448         kfree(hwif->sg_table);
 449         unregister_blkdev(hwif->major, hwif->name);
 450         spin_lock_irq(&ide_lock);
 451
 452         if (hwif->dma_base)
 453                 (void)ide_release_dma(hwif);
 454
 455         ide_hwif_release_regions(hwif);
 456
 457         /* restore hwif data to pristine status */
 458         ide_init_port_data(hwif, index);
 459
 460 abort:
 461         spin_unlock_irq(&ide_lock);
 462         mutex_unlock(&ide_cfg_mtx);
 463 }
 464
 465 EXPORT_SYMBOL(ide_unregister);
 466
 467 void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw)
 468 {
 469         memcpy(hwif->io_ports, hw->io_ports, sizeof(hwif->io_ports));
 470         hwif->irq = hw->irq;
 471         hwif->noprobe = 0;
 472         hwif->chipset = hw->chipset;
 473         hwif->gendev.parent = hw->dev;
 474         hwif->ack_intr = hw->ack_intr;
 475 }
 476 EXPORT_SYMBOL_GPL(ide_init_port_hw);
 477
 478 /*
 479  *      Locks for IDE setting functionality
 480  */
 481
 482 DEFINE_MUTEX(ide_setting_mtx);
 483
 484 EXPORT_SYMBOL_GPL(ide_setting_mtx);
 485
 486 /**
 487  *      ide_spin_wait_hwgroup   -       wait for group
 488  *      @drive: drive in the group
 489  *
 490  *      Wait for an IDE device group to go non busy and then return
 491  *      holding the ide_lock which guards the hwgroup->busy status
 492  *      and right to use it.
 493  */
 494
 495 int ide_spin_wait_hwgroup (ide_drive_t *drive)
 496 {
 497         ide_hwgroup_t *hwgroup = HWGROUP(drive);
 498         unsigned long timeout = jiffies + (3 * HZ);
 499
 500         spin_lock_irq(&ide_lock);
 501
 502         while (hwgroup->busy) {
 503                 unsigned long lflags;
 504                 spin_unlock_irq(&ide_lock);
 505                 local_irq_set(lflags);
 506                 if (time_after(jiffies, timeout)) {
 507                         local_irq_restore(lflags);
 508                         printk(KERN_ERR "%s: channel busy\n", drive->name);
 509                         return -EBUSY;
 510                 }
 511                 local_irq_restore(lflags);
 512                 spin_lock_irq(&ide_lock);
 513         }
 514         return 0;
 515 }
 516
 517 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
 518
 519 int set_io_32bit(ide_drive_t *drive, int arg)
 520 {
 521         if (drive->no_io_32bit)
 522                 return -EPERM;
 523
 524         if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
 525                 return -EINVAL;
 526
 527         if (ide_spin_wait_hwgroup(drive))
 528                 return -EBUSY;
 529
 530         drive->io_32bit = arg;
 531
 532         spin_unlock_irq(&ide_lock);
 533
 534         return 0;
 535 }
 536
 537 static int set_ksettings(ide_drive_t *drive, int arg)
 538 {
 539         if (arg < 0 || arg > 1)
 540                 return -EINVAL;
 541
 542         if (ide_spin_wait_hwgroup(drive))
 543                 return -EBUSY;
 544         drive->keep_settings = arg;
 545         spin_unlock_irq(&ide_lock);
 546
 547         return 0;
 548 }
 549
 550 int set_using_dma(ide_drive_t *drive, int arg)
 551 {
 552 #ifdef CONFIG_BLK_DEV_IDEDMA
 553         ide_hwif_t *hwif = drive->hwif;
 554         int err = -EPERM;
 555
 556         if (arg < 0 || arg > 1)
 557                 return -EINVAL;
 558
 559         if (!drive->id || !(drive->id->capability & 1))
 560                 goto out;
 561
 562         if (hwif->dma_host_set == NULL)
 563                 goto out;
 564
 565         err = -EBUSY;
 566         if (ide_spin_wait_hwgroup(drive))
 567                 goto out;
 568         /*
 569          * set ->busy flag, unlock and let it ride
 570          */
 571         hwif->hwgroup->busy = 1;
 572         spin_unlock_irq(&ide_lock);
 573
 574         err = 0;
 575
 576         if (arg) {
 577                 if (ide_set_dma(drive))
 578                         err = -EIO;
 579         } else
 580                 ide_dma_off(drive);
 581
 582         /*
 583          * lock, clear ->busy flag and unlock before leaving
 584          */
 585         spin_lock_irq(&ide_lock);
 586         hwif->hwgroup->busy = 0;
 587         spin_unlock_irq(&ide_lock);
 588 out:
 589         return err;
 590 #else
 591         if (arg < 0 || arg > 1)
 592                 return -EINVAL;
 593
 594         return -EPERM;
 595 #endif
 596 }
 597
 598 int set_pio_mode(ide_drive_t *drive, int arg)
 599 {
 600         struct request rq;
 601
 602         if (arg < 0 || arg > 255)
 603                 return -EINVAL;
 604
 605         if (drive->hwif->set_pio_mode == NULL)
 606                 return -ENOSYS;
 607
 608         if (drive->special.b.set_tune)
 609                 return -EBUSY;
 610
 611         ide_init_drive_cmd(&rq);
 612         rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
 613
 614         drive->tune_req = (u8) arg;
 615         drive->special.b.set_tune = 1;
 616         (void) ide_do_drive_cmd(drive, &rq, ide_wait);
 617         return 0;
 618 }
 619
 620 static int set_unmaskirq(ide_drive_t *drive, int arg)
 621 {
 622         if (drive->no_unmask)
 623                 return -EPERM;
 624
 625         if (arg < 0 || arg > 1)
 626                 return -EINVAL;
 627
 628         if (ide_spin_wait_hwgroup(drive))
 629                 return -EBUSY;
 630         drive->unmask = arg;
 631         spin_unlock_irq(&ide_lock);
 632
 633         return 0;
 634 }
 635
 636 /**
 637  *      system_bus_clock        -       clock guess
 638  *
 639  *      External version of the bus clock guess used by very old IDE drivers
 640  *      for things like VLB timings. Should not be used.
 641  */
 642
 643 int system_bus_clock (void)
 644 {
 645         return system_bus_speed;
 646 }
 647
 648 EXPORT_SYMBOL(system_bus_clock);
 649
 650 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
 651 {
 652         ide_drive_t *drive = dev->driver_data;
 653         ide_hwif_t *hwif = HWIF(drive);
 654         struct request rq;
 655         struct request_pm_state rqpm;
 656         ide_task_t args;
 657         int ret;
 658
 659         /* Call ACPI _GTM only once */
 660         if (!(drive->dn % 2))
 661                 ide_acpi_get_timing(hwif);
 662
 663         memset(&rq, 0, sizeof(rq));
 664         memset(&rqpm, 0, sizeof(rqpm));
 665         memset(&args, 0, sizeof(args));
 666         rq.cmd_type = REQ_TYPE_PM_SUSPEND;
 667         rq.special = &args;
 668         rq.data = &rqpm;
 669         rqpm.pm_step = ide_pm_state_start_suspend;
 670         if (mesg.event == PM_EVENT_PRETHAW)
 671                 mesg.event = PM_EVENT_FREEZE;
 672         rqpm.pm_state = mesg.event;
 673
 674         ret = ide_do_drive_cmd(drive, &rq, ide_wait);
 675         /* only call ACPI _PS3 after both drivers are suspended */
 676         if (!ret && (((drive->dn % 2) && hwif->drives[0].present
 677                  && hwif->drives[1].present)
 678                  || !hwif->drives[0].present
 679                  || !hwif->drives[1].present))
 680                 ide_acpi_set_state(hwif, 0);
 681         return ret;
 682 }
 683
 684 static int generic_ide_resume(struct device *dev)
 685 {
 686         ide_drive_t *drive = dev->driver_data;
 687         ide_hwif_t *hwif = HWIF(drive);
 688         struct request rq;
 689         struct request_pm_state rqpm;
 690         ide_task_t args;
 691         int err;
 692
 693         /* Call ACPI _STM only once */
 694         if (!(drive->dn % 2)) {
 695                 ide_acpi_set_state(hwif, 1);
 696                 ide_acpi_push_timing(hwif);
 697         }
 698
 699         ide_acpi_exec_tfs(drive);
 700
 701         memset(&rq, 0, sizeof(rq));
 702         memset(&rqpm, 0, sizeof(rqpm));
 703         memset(&args, 0, sizeof(args));
 704         rq.cmd_type = REQ_TYPE_PM_RESUME;
 705         rq.special = &args;
 706         rq.data = &rqpm;
 707         rqpm.pm_step = ide_pm_state_start_resume;
 708         rqpm.pm_state = PM_EVENT_ON;
 709
 710         err = ide_do_drive_cmd(drive, &rq, ide_head_wait);
 711
 712         if (err == 0 && dev->driver) {
 713                 ide_driver_t *drv = to_ide_driver(dev->driver);
 714
 715                 if (drv->resume)
 716                         drv->resume(drive);
 717         }
 718
 719         return err;
 720 }
 721
 722 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
 723                         unsigned int cmd, unsigned long arg)
 724 {
 725         unsigned long flags;
 726         ide_driver_t *drv;
 727         void __user *p = (void __user *)arg;
 728         int err = 0, (*setfunc)(ide_drive_t *, int);
 729         u8 *val;
 730
 731         switch (cmd) {
 732         case HDIO_GET_32BIT:        val = &drive->io_32bit;      goto read_val;
 733         case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
 734         case HDIO_GET_UNMASKINTR:   val = &drive->unmask;        goto read_val;
 735         case HDIO_GET_DMA:          val = &drive->using_dma;     goto read_val;
 736         case HDIO_SET_32BIT:        setfunc = set_io_32bit;      goto set_val;
 737         case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings;     goto set_val;
 738         case HDIO_SET_PIO_MODE:     setfunc = set_pio_mode;      goto set_val;
 739         case HDIO_SET_UNMASKINTR:   setfunc = set_unmaskirq;     goto set_val;
 740         case HDIO_SET_DMA:          setfunc = set_using_dma;     goto set_val;
 741         }
 742
 743         switch (cmd) {
 744                 case HDIO_OBSOLETE_IDENTITY:
 745                 case HDIO_GET_IDENTITY:
 746                         if (bdev != bdev->bd_contains)
 747                                 return -EINVAL;
 748                         if (drive->id_read == 0)
 749                                 return -ENOMSG;
 750                         if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
 751                                 return -EFAULT;
 752                         return 0;
 753
 754                 case HDIO_GET_NICE:
 755                         return put_user(drive->dsc_overlap      <<      IDE_NICE_DSC_OVERLAP    |
 756                                         drive->atapi_overlap    <<      IDE_NICE_ATAPI_OVERLAP  |
 757                                         drive->nice1 << IDE_NICE_1,
 758                                         (long __user *) arg);
 759 #ifdef CONFIG_IDE_TASK_IOCTL
 760                 case HDIO_DRIVE_TASKFILE:
 761                         if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
 762                                 return -EACCES;
 763                         switch(drive->media) {
 764                                 case ide_disk:
 765                                         return ide_taskfile_ioctl(drive, cmd, arg);
 766                                 default:
 767                                         return -ENOMSG;
 768                         }
 769 #endif /* CONFIG_IDE_TASK_IOCTL */
 770
 771                 case HDIO_DRIVE_CMD:
 772                         if (!capable(CAP_SYS_RAWIO))
 773                                 return -EACCES;
 774                         return ide_cmd_ioctl(drive, cmd, arg);
 775
 776                 case HDIO_DRIVE_TASK:
 777                         if (!capable(CAP_SYS_RAWIO))
 778                                 return -EACCES;
 779                         return ide_task_ioctl(drive, cmd, arg);
 780                 case HDIO_SET_NICE:
 781                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
 782                         if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
 783                                 return -EPERM;
 784                         drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
 785                         drv = *(ide_driver_t **)bdev->bd_disk->private_data;
 786                         if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
 787                                 drive->dsc_overlap = 0;
 788                                 return -EPERM;
 789                         }
 790                         drive->nice1 = (arg >> IDE_NICE_1) & 1;
 791                         return 0;
 792                 case HDIO_DRIVE_RESET:
 793                         if (!capable(CAP_SYS_ADMIN))
 794                                 return -EACCES;
 795
 796                         /*
 797                          *      Abort the current command on the
 798                          *      group if there is one, taking
 799                          *      care not to allow anything else
 800                          *      to be queued and to die on the
 801                          *      spot if we miss one somehow
 802                          */
 803
 804                         spin_lock_irqsave(&ide_lock, flags);
 805
 806                         if (HWGROUP(drive)->resetting) {
 807                                 spin_unlock_irqrestore(&ide_lock, flags);
 808                                 return -EBUSY;
 809                         }
 810
 811                         ide_abort(drive, "drive reset");
 812
 813                         BUG_ON(HWGROUP(drive)->handler);
 814
 815                         /* Ensure nothing gets queued after we
 816                            drop the lock. Reset will clear the busy */
 817
 818                         HWGROUP(drive)->busy = 1;
 819                         spin_unlock_irqrestore(&ide_lock, flags);
 820                         (void) ide_do_reset(drive);
 821
 822                         return 0;
 823                 case HDIO_GET_BUSSTATE:
 824                         if (!capable(CAP_SYS_ADMIN))
 825                                 return -EACCES;
 826                         if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
 827                                 return -EFAULT;
 828                         return 0;
 829
 830                 case HDIO_SET_BUSSTATE:
 831                         if (!capable(CAP_SYS_ADMIN))
 832                                 return -EACCES;
 833                         return -EOPNOTSUPP;
 834                 default:
 835                         return -EINVAL;
 836         }
 837
 838 read_val:
 839         mutex_lock(&ide_setting_mtx);
 840         spin_lock_irqsave(&ide_lock, flags);
 841         err = *val;
 842         spin_unlock_irqrestore(&ide_lock, flags);
 843         mutex_unlock(&ide_setting_mtx);
 844         return err >= 0 ? put_user(err, (long __user *)arg) : err;
 845
 846 set_val:
 847         if (bdev != bdev->bd_contains)
 848                 err = -EINVAL;
 849         else {
 850                 if (!capable(CAP_SYS_ADMIN))
 851                         err = -EACCES;
 852                 else {
 853                         mutex_lock(&ide_setting_mtx);
 854                         err = setfunc(drive, arg);
 855                         mutex_unlock(&ide_setting_mtx);
 856                 }
 857         }
 858         return err;
 859 }
 860
 861 EXPORT_SYMBOL(generic_ide_ioctl);
 862
 863 /*
 864  * stridx() returns the offset of c within s,
 865  * or -1 if c is '\0' or not found within s.
 866  */
 867 static int __init stridx (const char *s, char c)
 868 {
 869         char *i = strchr(s, c);
 870         return (i && c) ? i - s : -1;
 871 }
 872
 873 /*
 874  * match_parm() does parsing for ide_setup():
 875  *
 876  * 1. the first char of s must be '='.
 877  * 2. if the remainder matches one of the supplied keywords,
 878  *     the index (1 based) of the keyword is negated and returned.
 879  * 3. if the remainder is a series of no more than max_vals numbers
 880  *     separated by commas, the numbers are saved in vals[] and a
 881  *     count of how many were saved is returned.  Base10 is assumed,
 882  *     and base16 is allowed when prefixed with "0x".
 883  * 4. otherwise, zero is returned.
 884  */
 885 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
 886 {
 887         static const char *decimal = "0123456789";
 888         static const char *hex = "0123456789abcdef";
 889         int i, n;
 890
 891         if (*s++ == '=') {
 892                 /*
 893                  * Try matching against the supplied keywords,
 894                  * and return -(index+1) if we match one
 895                  */
 896                 if (keywords != NULL) {
 897                         for (i = 0; *keywords != NULL; ++i) {
 898                                 if (!strcmp(s, *keywords++))
 899                                         return -(i+1);
 900                         }
 901                 }
 902                 /*
 903                  * Look for a series of no more than "max_vals"
 904                  * numeric values separated by commas, in base10,
 905                  * or base16 when prefixed with "0x".
 906                  * Return a count of how many were found.
 907                  */
 908                 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
 909                         vals[n] = i;
 910                         while ((i = stridx(decimal, *++s)) >= 0)
 911                                 vals[n] = (vals[n] * 10) + i;
 912                         if (*s == 'x' && !vals[n]) {
 913                                 while ((i = stridx(hex, *++s)) >= 0)
 914                                         vals[n] = (vals[n] * 0x10) + i;
 915                         }
 916                         if (++n == max_vals)
 917                                 break;
 918                         if (*s == ',' || *s == ';')
 919                                 ++s;
 920                 }
 921                 if (!*s)
 922                         return n;
 923         }
 924         return 0;       /* zero = nothing matched */
 925 }
 926
 927 extern int probe_ali14xx;
 928 extern int probe_umc8672;
 929 extern int probe_dtc2278;
 930 extern int probe_ht6560b;
 931 extern int probe_qd65xx;
 932 extern int cmd640_vlb;
 933 extern int probe_4drives;
 934
 935 static int __initdata is_chipset_set;
 936
 937 /*
 938  * ide_setup() gets called VERY EARLY during initialization,
 939  * to handle kernel "command line" strings beginning with "hdx=" or "ide".
 940  *
 941  * Remember to update Documentation/ide/ide.txt if you change something here.
 942  */
 943 static int __init ide_setup(char *s)
 944 {
 945         int i, vals[3];
 946         ide_hwif_t *hwif;
 947         ide_drive_t *drive;
 948         unsigned int hw, unit;
 949         const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
 950         const char max_hwif  = '0' + (MAX_HWIFS - 1);
 951
 952
 953         if (strncmp(s,"hd",2) == 0 && s[2] == '=')      /* hd= is for hd.c   */
 954                 return 0;                               /* driver and not us */
 955
 956         if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
 957                 return 0;
 958
 959         printk(KERN_INFO "ide_setup: %s", s);
 960         init_ide_data ();
 961
 962 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
 963         if (!strcmp(s, "ide=doubler")) {
 964                 extern int ide_doubler;
 965
 966                 printk(" : Enabled support for IDE doublers\n");
 967                 ide_doubler = 1;
 968                 return 1;
 969         }
 970 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
 971
 972         if (!strcmp(s, "ide=nodma")) {
 973                 printk(" : Prevented DMA\n");
 974                 noautodma = 1;
 975                 goto obsolete_option;
 976         }
 977
 978 #ifdef CONFIG_BLK_DEV_IDEACPI
 979         if (!strcmp(s, "ide=noacpi")) {
 980                 //printk(" : Disable IDE ACPI support.\n");
 981                 ide_noacpi = 1;
 982                 return 1;
 983         }
 984         if (!strcmp(s, "ide=acpigtf")) {
 985                 //printk(" : Enable IDE ACPI _GTF support.\n");
 986                 ide_noacpitfs = 0;
 987                 return 1;
 988         }
 989         if (!strcmp(s, "ide=acpionboot")) {
 990                 //printk(" : Call IDE ACPI methods on boot.\n");
 991                 ide_noacpionboot = 0;
 992                 return 1;
 993         }
 994 #endif /* CONFIG_BLK_DEV_IDEACPI */
 995
 996         /*
 997          * Look for drive options:  "hdx="
 998          */
 999         if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1000                 const char *hd_words[] = {
1001                         "none", "noprobe", "nowerr", "cdrom", "nodma",
1002                         "autotune", "noautotune", "-8", "-9", "-10",
1003                         "noflush", "remap", "remap63", "scsi", NULL };
1004                 unit = s[2] - 'a';
1005                 hw   = unit / MAX_DRIVES;
1006                 unit = unit % MAX_DRIVES;
1007                 hwif = &ide_hwifs[hw];
1008                 drive = &hwif->drives[unit];
1009                 if (strncmp(s + 4, "ide-", 4) == 0) {
1010                         strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1011                         goto obsolete_option;
1012                 }
1013                 switch (match_parm(&s[3], hd_words, vals, 3)) {
1014                         case -1: /* "none" */
1015                         case -2: /* "noprobe" */
1016                                 drive->noprobe = 1;
1017                                 goto done;
1018                         case -3: /* "nowerr" */
1019                                 drive->bad_wstat = BAD_R_STAT;
1020                                 hwif->noprobe = 0;
1021                                 goto done;
1022                         case -4: /* "cdrom" */
1023                                 drive->present = 1;
1024                                 drive->media = ide_cdrom;
1025                                 /* an ATAPI device ignores DRDY */
1026                                 drive->ready_stat = 0;
1027                                 hwif->noprobe = 0;
1028                                 goto done;
1029                         case -5: /* nodma */
1030                                 drive->nodma = 1;
1031                                 goto done;
1032                         case -6: /* "autotune" */
1033                                 drive->autotune = IDE_TUNE_AUTO;
1034                                 goto obsolete_option;
1035                         case -7: /* "noautotune" */
1036                                 drive->autotune = IDE_TUNE_NOAUTO;
1037                                 goto obsolete_option;
1038                         case -11: /* noflush */
1039                                 drive->noflush = 1;
1040                                 goto done;
1041                         case -12: /* "remap" */
1042                                 drive->remap_0_to_1 = 1;
1043                                 goto obsolete_option;
1044                         case -13: /* "remap63" */
1045                                 drive->sect0 = 63;
1046                                 goto obsolete_option;
1047                         case -14: /* "scsi" */
1048                                 drive->scsi = 1;
1049                                 goto obsolete_option;
1050                         case 3: /* cyl,head,sect */
1051                                 drive->media    = ide_disk;
1052                                 drive->ready_stat = READY_STAT;
1053                                 drive->cyl      = drive->bios_cyl  = vals[0];
1054                                 drive->head     = drive->bios_head = vals[1];
1055                                 drive->sect     = drive->bios_sect = vals[2];
1056                                 drive->present  = 1;
1057                                 drive->forced_geom = 1;
1058                                 hwif->noprobe = 0;
1059                                 goto done;
1060                         default:
1061                                 goto bad_option;
1062                 }
1063         }
1064
1065         if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1066                 goto bad_option;
1067         /*
1068          * Look for bus speed option:  "idebus="
1069          */
1070         if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1071                 if (match_parm(&s[6], NULL, vals, 1) != 1)
1072                         goto bad_option;
1073                 if (vals[0] >= 20 && vals[0] <= 66) {
1074                         idebus_parameter = vals[0];
1075                 } else
1076                         printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1077                 goto done;
1078         }
1079         /*
1080          * Look for interface options:  "idex="
1081          */
1082         if (s[3] >= '0' && s[3] <= max_hwif) {
1083                 /*
1084                  * Be VERY CAREFUL changing this: note hardcoded indexes below
1085                  * (-8, -9, -10) are reserved to ease the hardcoding.
1086                  */
1087                 static const char *ide_words[] = {
1088                         "minus1", "serialize", "minus3", "minus4",
1089                         "reset", "minus6", "ata66", "minus8", "minus9",
1090                         "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1091                         "dtc2278", "umc8672", "ali14xx", NULL };
1092
1093                 hw = s[3] - '0';
1094                 hwif = &ide_hwifs[hw];
1095                 i = match_parm(&s[4], ide_words, vals, 3);
1096
1097                 /*
1098                  * Cryptic check to ensure chipset not already set for hwif.
1099                  * Note: we can't depend on hwif->chipset here.
1100                  */
1101                 if (i >= -18 && i <= -11) {
1102                         /* chipset already specified */
1103                         if (is_chipset_set)
1104                                 goto bad_option;
1105                         /* these drivers are for "ide0=" only */
1106                         if (hw != 0)
1107                                 goto bad_hwif;
1108                         is_chipset_set = 1;
1109                         printk("\n");
1110                 }
1111
1112                 switch (i) {
1113 #ifdef CONFIG_BLK_DEV_ALI14XX
1114                         case -17: /* "ali14xx" */
1115                                 probe_ali14xx = 1;
1116                                 goto obsolete_option;
1117 #endif
1118 #ifdef CONFIG_BLK_DEV_UMC8672
1119                         case -16: /* "umc8672" */
1120                                 probe_umc8672 = 1;
1121                                 goto obsolete_option;
1122 #endif
1123 #ifdef CONFIG_BLK_DEV_DTC2278
1124                         case -15: /* "dtc2278" */
1125                                 probe_dtc2278 = 1;
1126                                 goto obsolete_option;
1127 #endif
1128 #ifdef CONFIG_BLK_DEV_CMD640
1129                         case -14: /* "cmd640_vlb" */
1130                                 cmd640_vlb = 1;
1131                                 goto obsolete_option;
1132 #endif
1133 #ifdef CONFIG_BLK_DEV_HT6560B
1134                         case -13: /* "ht6560b" */
1135                                 probe_ht6560b = 1;
1136                                 goto obsolete_option;
1137 #endif
1138 #ifdef CONFIG_BLK_DEV_QD65XX
1139                         case -12: /* "qd65xx" */
1140                                 probe_qd65xx = 1;
1141                                 goto obsolete_option;
1142 #endif
1143 #ifdef CONFIG_BLK_DEV_4DRIVES
1144                         case -11: /* "four" drives on one set of ports */
1145                                 probe_4drives = 1;
1146                                 goto obsolete_option;
1147 #endif
1148                         case -10: /* minus10 */
1149                         case -9: /* minus9 */
1150                         case -8: /* minus8 */
1151                         case -6:
1152                         case -4:
1153                         case -3:
1154                                 goto bad_option;
1155                         case -7: /* ata66 */
1156 #ifdef CONFIG_BLK_DEV_IDEPCI
1157                                 /*
1158                                  * Use ATA_CBL_PATA40_SHORT so drive side
1159                                  * cable detection is also overriden.
1160                                  */
1161                                 hwif->cbl = ATA_CBL_PATA40_SHORT;
1162                                 goto obsolete_option;
1163 #else
1164                                 goto bad_hwif;
1165 #endif
1166                         case -5: /* "reset" */
1167                                 hwif->reset = 1;
1168                                 goto obsolete_option;
1169                         case -2: /* "serialize" */
1170                                 hwif->mate = &ide_hwifs[hw^1];
1171                                 hwif->mate->mate = hwif;
1172                                 hwif->serialized = hwif->mate->serialized = 1;
1173                                 goto obsolete_option;
1174
1175                         case -1:
1176                         case 0:
1177                         case 1:
1178                         case 2:
1179                         case 3:
1180                                 goto bad_option;
1181                         default:
1182                                 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1183                                 return 1;
1184                 }
1185         }
1186 bad_option:
1187         printk(" -- BAD OPTION\n");
1188         return 1;
1189 obsolete_option:
1190         printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1191         return 1;
1192 bad_hwif:
1193         printk("-- NOT SUPPORTED ON ide%d", hw);
1194 done:
1195         printk("\n");
1196         return 1;
1197 }
1198
1199 EXPORT_SYMBOL(ide_lock);
1200
1201 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1202 {
1203         return 1;
1204 }
1205
1206 static char *media_string(ide_drive_t *drive)
1207 {
1208         switch (drive->media) {
1209         case ide_disk:
1210                 return "disk";
1211         case ide_cdrom:
1212                 return "cdrom";
1213         case ide_tape:
1214                 return "tape";
1215         case ide_floppy:
1216                 return "floppy";
1217         case ide_optical:
1218                 return "optical";
1219         default:
1220                 return "UNKNOWN";
1221         }
1222 }
1223
1224 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1225 {
1226         ide_drive_t *drive = to_ide_device(dev);
1227         return sprintf(buf, "%s\n", media_string(drive));
1228 }
1229
1230 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1231 {
1232         ide_drive_t *drive = to_ide_device(dev);
1233         return sprintf(buf, "%s\n", drive->name);
1234 }
1235
1236 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1237 {
1238         ide_drive_t *drive = to_ide_device(dev);
1239         return sprintf(buf, "ide:m-%s\n", media_string(drive));
1240 }
1241
1242 static ssize_t model_show(struct device *dev, struct device_attribute *attr,
1243                           char *buf)
1244 {
1245         ide_drive_t *drive = to_ide_device(dev);
1246         return sprintf(buf, "%s\n", drive->id->model);
1247 }
1248
1249 static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
1250                              char *buf)
1251 {
1252         ide_drive_t *drive = to_ide_device(dev);
1253         return sprintf(buf, "%s\n", drive->id->fw_rev);
1254 }
1255
1256 static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
1257                            char *buf)
1258 {
1259         ide_drive_t *drive = to_ide_device(dev);
1260         return sprintf(buf, "%s\n", drive->id->serial_no);
1261 }
1262
1263 static struct device_attribute ide_dev_attrs[] = {
1264         __ATTR_RO(media),
1265         __ATTR_RO(drivename),
1266         __ATTR_RO(modalias),
1267         __ATTR_RO(model),
1268         __ATTR_RO(firmware),
1269         __ATTR(serial, 0400, serial_show, NULL),
1270         __ATTR_NULL
1271 };
1272
1273 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
1274 {
1275         ide_drive_t *drive = to_ide_device(dev);
1276
1277         add_uevent_var(env, "MEDIA=%s", media_string(drive));
1278         add_uevent_var(env, "DRIVENAME=%s", drive->name);
1279         add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
1280         return 0;
1281 }
1282
1283 static int generic_ide_probe(struct device *dev)
1284 {
1285         ide_drive_t *drive = to_ide_device(dev);
1286         ide_driver_t *drv = to_ide_driver(dev->driver);
1287
1288         return drv->probe ? drv->probe(drive) : -ENODEV;
1289 }
1290
1291 static int generic_ide_remove(struct device *dev)
1292 {
1293         ide_drive_t *drive = to_ide_device(dev);
1294         ide_driver_t *drv = to_ide_driver(dev->driver);
1295
1296         if (drv->remove)
1297                 drv->remove(drive);
1298
1299         return 0;
1300 }
1301
1302 static void generic_ide_shutdown(struct device *dev)
1303 {
1304         ide_drive_t *drive = to_ide_device(dev);
1305         ide_driver_t *drv = to_ide_driver(dev->driver);
1306
1307         if (dev->driver && drv->shutdown)
1308                 drv->shutdown(drive);
1309 }
1310
1311 struct bus_type ide_bus_type = {
1312         .name           = "ide",
1313         .match          = ide_bus_match,
1314         .uevent         = ide_uevent,
1315         .probe          = generic_ide_probe,
1316         .remove         = generic_ide_remove,
1317         .shutdown       = generic_ide_shutdown,
1318         .dev_attrs      = ide_dev_attrs,
1319         .suspend        = generic_ide_suspend,
1320         .resume         = generic_ide_resume,
1321 };
1322
1323 EXPORT_SYMBOL_GPL(ide_bus_type);
1324
1325 static void ide_port_class_release(struct device *portdev)
1326 {
1327         ide_hwif_t *hwif = dev_get_drvdata(portdev);
1328
1329         put_device(&hwif->gendev);
1330 }
1331
1332 /*
1333  * This is gets invoked once during initialization, to set *everything* up
1334  */
1335 static int __init ide_init(void)
1336 {
1337         int ret;
1338
1339         printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n");
1340         system_bus_speed = ide_system_bus_speed();
1341
1342         printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
1343                          "for PIO modes%s\n", system_bus_speed,
1344                         idebus_parameter ? "" : "; override with idebus=xx");
1345
1346         ret = bus_register(&ide_bus_type);
1347         if (ret < 0) {
1348                 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1349                 return ret;
1350         }
1351
1352         ide_port_class = class_create(THIS_MODULE, "ide_port");
1353         if (IS_ERR(ide_port_class)) {
1354                 ret = PTR_ERR(ide_port_class);
1355                 goto out_port_class;
1356         }
1357         ide_port_class->dev_release = ide_port_class_release;
1358
1359         init_ide_data();
1360
1361         proc_ide_create();
1362
1363         return 0;
1364
1365 out_port_class:
1366         bus_unregister(&ide_bus_type);
1367
1368         return ret;
1369 }
1370
1371 #ifdef MODULE
1372 static char *options = NULL;
1373 module_param(options, charp, 0);
1374 MODULE_LICENSE("GPL");
1375
1376 static void __init parse_options (char *line)
1377 {
1378         char *next = line;
1379
1380         if (line == NULL || !*line)
1381                 return;
1382         while ((line = next) != NULL) {
1383                 if ((next = strchr(line,' ')) != NULL)
1384                         *next++ = 0;
1385                 if (!ide_setup(line))
1386                         printk (KERN_INFO "Unknown option '%s'\n", line);
1387         }
1388 }
1389
1390 int __init init_module (void)
1391 {
1392         parse_options(options);
1393         return ide_init();
1394 }
1395
1396 void __exit cleanup_module (void)
1397 {
1398         int index;
1399
1400         for (index = 0; index < MAX_HWIFS; ++index)
1401                 ide_unregister(index);
1402
1403         proc_ide_destroy();
1404
1405         class_destroy(ide_port_class);
1406
1407         bus_unregister(&ide_bus_type);
1408 }
1409
1410 #else /* !MODULE */
1411
1412 __setup("", ide_setup);
1413
1414 module_init(ide_init);
1415
1416 #endif /* MODULE */