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 /*
 104  * This is declared extern in ide.h, for access by other IDE modules:
 105  */
 106 ide_hwif_t ide_hwifs[MAX_HWIFS];        /* master data repository */
 107
 108 EXPORT_SYMBOL(ide_hwifs);
 109
 110 static void ide_port_init_devices_data(ide_hwif_t *);
 111
 112 /*
 113  * Do not even *think* about calling this!
 114  */
 115 void ide_init_port_data(ide_hwif_t *hwif, unsigned int index)
 116 {
 117         /* bulk initialize hwif & drive info with zeros */
 118         memset(hwif, 0, sizeof(ide_hwif_t));
 119
 120         /* fill in any non-zero initial values */
 121         hwif->index     = index;
 122         hwif->major     = ide_hwif_to_major[index];
 123
 124         hwif->name[0]   = 'i';
 125         hwif->name[1]   = 'd';
 126         hwif->name[2]   = 'e';
 127         hwif->name[3]   = '0' + index;
 128
 129         hwif->bus_state = BUSSTATE_ON;
 130
 131         init_completion(&hwif->gendev_rel_comp);
 132
 133         default_hwif_iops(hwif);
 134         default_hwif_transport(hwif);
 135
 136         ide_port_init_devices_data(hwif);
 137 }
 138 EXPORT_SYMBOL_GPL(ide_init_port_data);
 139
 140 static void ide_port_init_devices_data(ide_hwif_t *hwif)
 141 {
 142         int unit;
 143
 144         for (unit = 0; unit < MAX_DRIVES; ++unit) {
 145                 ide_drive_t *drive = &hwif->drives[unit];
 146                 u8 j = (hwif->index * MAX_DRIVES) + unit;
 147
 148                 memset(drive, 0, sizeof(*drive));
 149
 150                 drive->media                    = ide_disk;
 151                 drive->select.all               = (unit<<4)|0xa0;
 152                 drive->hwif                     = hwif;
 153                 drive->ctl                      = 0x08;
 154                 drive->ready_stat               = READY_STAT;
 155                 drive->bad_wstat                = BAD_W_STAT;
 156                 drive->special.b.recalibrate    = 1;
 157                 drive->special.b.set_geometry   = 1;
 158                 drive->name[0]                  = 'h';
 159                 drive->name[1]                  = 'd';
 160                 drive->name[2]                  = 'a' + j;
 161                 drive->max_failures             = IDE_DEFAULT_MAX_FAILURES;
 162
 163                 INIT_LIST_HEAD(&drive->list);
 164                 init_completion(&drive->gendev_rel_comp);
 165         }
 166 }
 167
 168 /*
 169  * init_ide_data() sets reasonable default values into all fields
 170  * of all instances of the hwifs and drives, but only on the first call.
 171  * Subsequent calls have no effect (they don't wipe out anything).
 172  *
 173  * This routine is normally called at driver initialization time,
 174  * but may also be called MUCH earlier during kernel "command-line"
 175  * parameter processing.  As such, we cannot depend on any other parts
 176  * of the kernel (such as memory allocation) to be functioning yet.
 177  *
 178  * This is too bad, as otherwise we could dynamically allocate the
 179  * ide_drive_t structs as needed, rather than always consuming memory
 180  * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
 181  *
 182  * FIXME: We should stuff the setup data into __init and copy the
 183  * relevant hwifs/allocate them properly during boot.
 184  */
 185 #define MAGIC_COOKIE 0x12345678
 186 static void __init init_ide_data (void)
 187 {
 188         unsigned int index;
 189         static unsigned long magic_cookie = MAGIC_COOKIE;
 190
 191         if (magic_cookie != MAGIC_COOKIE)
 192                 return;         /* already initialized */
 193         magic_cookie = 0;
 194
 195         /* Initialise all interface structures */
 196         for (index = 0; index < MAX_HWIFS; ++index) {
 197                 ide_hwif_t *hwif = &ide_hwifs[index];
 198
 199                 ide_init_port_data(hwif, index);
 200         }
 201 }
 202
 203 /**
 204  *      ide_system_bus_speed    -       guess bus speed
 205  *
 206  *      ide_system_bus_speed() returns what we think is the system VESA/PCI
 207  *      bus speed (in MHz). This is used for calculating interface PIO timings.
 208  *      The default is 40 for known PCI systems, 50 otherwise.
 209  *      The "idebus=xx" parameter can be used to override this value.
 210  *      The actual value to be used is computed/displayed the first time
 211  *      through. Drivers should only use this as a last resort.
 212  *
 213  *      Returns a guessed speed in MHz.
 214  */
 215
 216 static int ide_system_bus_speed(void)
 217 {
 218 #ifdef CONFIG_PCI
 219         static struct pci_device_id pci_default[] = {
 220                 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
 221                 { }
 222         };
 223 #else
 224 #define pci_default 0
 225 #endif /* CONFIG_PCI */
 226
 227         /* user supplied value */
 228         if (idebus_parameter)
 229                 return idebus_parameter;
 230
 231         /* safe default value for PCI or VESA and PCI*/
 232         return pci_dev_present(pci_default) ? 33 : 50;
 233 }
 234
 235 static struct resource* hwif_request_region(ide_hwif_t *hwif,
 236                                             unsigned long addr, int num)
 237 {
 238         struct resource *res = request_region(addr, num, hwif->name);
 239
 240         if (!res)
 241                 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
 242                                 hwif->name, addr, addr+num-1);
 243         return res;
 244 }
 245
 246 /**
 247  *      ide_hwif_request_regions - request resources for IDE
 248  *      @hwif: interface to use
 249  *
 250  *      Requests all the needed resources for an interface.
 251  *      Right now core IDE code does this work which is deeply wrong.
 252  *      MMIO leaves it to the controller driver,
 253  *      PIO will migrate this way over time.
 254  */
 255
 256 int ide_hwif_request_regions(ide_hwif_t *hwif)
 257 {
 258         unsigned long addr;
 259         unsigned int i;
 260
 261         if (hwif->mmio)
 262                 return 0;
 263         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
 264         if (addr && !hwif_request_region(hwif, addr, 1))
 265                 goto control_region_busy;
 266         hwif->straight8 = 0;
 267         addr = hwif->io_ports[IDE_DATA_OFFSET];
 268         if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
 269                 if (!hwif_request_region(hwif, addr, 8))
 270                         goto data_region_busy;
 271                 hwif->straight8 = 1;
 272                 return 0;
 273         }
 274         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
 275                 addr = hwif->io_ports[i];
 276                 if (!hwif_request_region(hwif, addr, 1)) {
 277                         while (--i)
 278                                 release_region(addr, 1);
 279                         goto data_region_busy;
 280                 }
 281         }
 282         return 0;
 283
 284 data_region_busy:
 285         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
 286         if (addr)
 287                 release_region(addr, 1);
 288 control_region_busy:
 289         /* If any errors are return, we drop the hwif interface. */
 290         return -EBUSY;
 291 }
 292
 293 /**
 294  *      ide_hwif_release_regions - free IDE resources
 295  *
 296  *      Note that we only release the standard ports,
 297  *      and do not even try to handle any extra ports
 298  *      allocated for weird IDE interface chipsets.
 299  *
 300  *      Note also that we don't yet handle mmio resources here. More
 301  *      importantly our caller should be doing this so we need to
 302  *      restructure this as a helper function for drivers.
 303  */
 304
 305 void ide_hwif_release_regions(ide_hwif_t *hwif)
 306 {
 307         u32 i = 0;
 308
 309         if (hwif->mmio)
 310                 return;
 311         if (hwif->io_ports[IDE_CONTROL_OFFSET])
 312                 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
 313         if (hwif->straight8) {
 314                 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
 315                 return;
 316         }
 317         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
 318                 if (hwif->io_ports[i])
 319                         release_region(hwif->io_ports[i], 1);
 320 }
 321
 322 void ide_remove_port_from_hwgroup(ide_hwif_t *hwif)
 323 {
 324         ide_hwgroup_t *hwgroup = hwif->hwgroup;
 325
 326         spin_lock_irq(&ide_lock);
 327         /*
 328          * Remove us from the hwgroup, and free
 329          * the hwgroup if we were the only member
 330          */
 331         if (hwif->next == hwif) {
 332                 BUG_ON(hwgroup->hwif != hwif);
 333                 kfree(hwgroup);
 334         } else {
 335                 /* There is another interface in hwgroup.
 336                  * Unlink us, and set hwgroup->drive and ->hwif to
 337                  * something sane.
 338                  */
 339                 ide_hwif_t *g = hwgroup->hwif;
 340
 341                 while (g->next != hwif)
 342                         g = g->next;
 343                 g->next = hwif->next;
 344                 if (hwgroup->hwif == hwif) {
 345                         /* Chose a random hwif for hwgroup->hwif.
 346                          * It's guaranteed that there are no drives
 347                          * left in the hwgroup.
 348                          */
 349                         BUG_ON(hwgroup->drive != NULL);
 350                         hwgroup->hwif = g;
 351                 }
 352                 BUG_ON(hwgroup->hwif == hwif);
 353         }
 354         spin_unlock_irq(&ide_lock);
 355 }
 356
 357 /* Called with ide_lock held. */
 358 static void __ide_port_unregister_devices(ide_hwif_t *hwif)
 359 {
 360         int i;
 361
 362         for (i = 0; i < MAX_DRIVES; i++) {
 363                 ide_drive_t *drive = &hwif->drives[i];
 364
 365                 if (drive->present) {
 366                         spin_unlock_irq(&ide_lock);
 367                         device_unregister(&drive->gendev);
 368                         wait_for_completion(&drive->gendev_rel_comp);
 369                         spin_lock_irq(&ide_lock);
 370                 }
 371         }
 372 }
 373
 374 void ide_port_unregister_devices(ide_hwif_t *hwif)
 375 {
 376         mutex_lock(&ide_cfg_mtx);
 377         spin_lock_irq(&ide_lock);
 378         __ide_port_unregister_devices(hwif);
 379         hwif->present = 0;
 380         ide_port_init_devices_data(hwif);
 381         spin_unlock_irq(&ide_lock);
 382         mutex_unlock(&ide_cfg_mtx);
 383 }
 384 EXPORT_SYMBOL_GPL(ide_port_unregister_devices);
 385
 386 /**
 387  *      ide_unregister          -       free an IDE interface
 388  *      @index: index of interface (will change soon to a pointer)
 389  *
 390  *      Perform the final unregister of an IDE interface. At the moment
 391  *      we don't refcount interfaces so this will also get split up.
 392  *
 393  *      Locking:
 394  *      The caller must not hold the IDE locks
 395  *      The drive present/vanishing is not yet properly locked
 396  *      Take care with the callbacks. These have been split to avoid
 397  *      deadlocking the IDE layer. The shutdown callback is called
 398  *      before we take the lock and free resources. It is up to the
 399  *      caller to be sure there is no pending I/O here, and that
 400  *      the interface will not be reopened (present/vanishing locking
 401  *      isn't yet done BTW). After we commit to the final kill we
 402  *      call the cleanup callback with the ide locks held.
 403  *
 404  *      Unregister restores the hwif structures to the default state.
 405  *      This is raving bonkers.
 406  */
 407
 408 void ide_unregister(unsigned int index)
 409 {
 410         ide_hwif_t *hwif, *g;
 411         ide_hwgroup_t *hwgroup;
 412         int irq_count = 0;
 413
 414         BUG_ON(index >= MAX_HWIFS);
 415
 416         BUG_ON(in_interrupt());
 417         BUG_ON(irqs_disabled());
 418         mutex_lock(&ide_cfg_mtx);
 419         spin_lock_irq(&ide_lock);
 420         hwif = &ide_hwifs[index];
 421         if (!hwif->present)
 422                 goto abort;
 423         __ide_port_unregister_devices(hwif);
 424         hwif->present = 0;
 425
 426         spin_unlock_irq(&ide_lock);
 427
 428         ide_proc_unregister_port(hwif);
 429
 430         hwgroup = hwif->hwgroup;
 431         /*
 432          * free the irq if we were the only hwif using it
 433          */
 434         g = hwgroup->hwif;
 435         do {
 436                 if (g->irq == hwif->irq)
 437                         ++irq_count;
 438                 g = g->next;
 439         } while (g != hwgroup->hwif);
 440         if (irq_count == 1)
 441                 free_irq(hwif->irq, hwgroup);
 442
 443         ide_remove_port_from_hwgroup(hwif);
 444
 445         device_unregister(hwif->portdev);
 446         device_unregister(&hwif->gendev);
 447         wait_for_completion(&hwif->gendev_rel_comp);
 448
 449         /*
 450          * Remove us from the kernel's knowledge
 451          */
 452         blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
 453         kfree(hwif->sg_table);
 454         unregister_blkdev(hwif->major, hwif->name);
 455         spin_lock_irq(&ide_lock);
 456
 457         if (hwif->dma_base)
 458                 (void)ide_release_dma(hwif);
 459
 460         ide_hwif_release_regions(hwif);
 461
 462         /* restore hwif data to pristine status */
 463         ide_init_port_data(hwif, index);
 464
 465 abort:
 466         spin_unlock_irq(&ide_lock);
 467         mutex_unlock(&ide_cfg_mtx);
 468 }
 469
 470 EXPORT_SYMBOL(ide_unregister);
 471
 472 void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw)
 473 {
 474         memcpy(hwif->io_ports, hw->io_ports, sizeof(hwif->io_ports));
 475         hwif->irq = hw->irq;
 476         hwif->noprobe = 0;
 477         hwif->chipset = hw->chipset;
 478         hwif->gendev.parent = hw->dev;
 479         hwif->ack_intr = hw->ack_intr;
 480 }
 481 EXPORT_SYMBOL_GPL(ide_init_port_hw);
 482
 483 /*
 484  *      Locks for IDE setting functionality
 485  */
 486
 487 DEFINE_MUTEX(ide_setting_mtx);
 488
 489 EXPORT_SYMBOL_GPL(ide_setting_mtx);
 490
 491 /**
 492  *      ide_spin_wait_hwgroup   -       wait for group
 493  *      @drive: drive in the group
 494  *
 495  *      Wait for an IDE device group to go non busy and then return
 496  *      holding the ide_lock which guards the hwgroup->busy status
 497  *      and right to use it.
 498  */
 499
 500 int ide_spin_wait_hwgroup (ide_drive_t *drive)
 501 {
 502         ide_hwgroup_t *hwgroup = HWGROUP(drive);
 503         unsigned long timeout = jiffies + (3 * HZ);
 504
 505         spin_lock_irq(&ide_lock);
 506
 507         while (hwgroup->busy) {
 508                 unsigned long lflags;
 509                 spin_unlock_irq(&ide_lock);
 510                 local_irq_set(lflags);
 511                 if (time_after(jiffies, timeout)) {
 512                         local_irq_restore(lflags);
 513                         printk(KERN_ERR "%s: channel busy\n", drive->name);
 514                         return -EBUSY;
 515                 }
 516                 local_irq_restore(lflags);
 517                 spin_lock_irq(&ide_lock);
 518         }
 519         return 0;
 520 }
 521
 522 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
 523
 524 int set_io_32bit(ide_drive_t *drive, int arg)
 525 {
 526         if (drive->no_io_32bit)
 527                 return -EPERM;
 528
 529         if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
 530                 return -EINVAL;
 531
 532         if (ide_spin_wait_hwgroup(drive))
 533                 return -EBUSY;
 534
 535         drive->io_32bit = arg;
 536
 537         spin_unlock_irq(&ide_lock);
 538
 539         return 0;
 540 }
 541
 542 static int set_ksettings(ide_drive_t *drive, int arg)
 543 {
 544         if (arg < 0 || arg > 1)
 545                 return -EINVAL;
 546
 547         if (ide_spin_wait_hwgroup(drive))
 548                 return -EBUSY;
 549         drive->keep_settings = arg;
 550         spin_unlock_irq(&ide_lock);
 551
 552         return 0;
 553 }
 554
 555 int set_using_dma(ide_drive_t *drive, int arg)
 556 {
 557 #ifdef CONFIG_BLK_DEV_IDEDMA
 558         ide_hwif_t *hwif = drive->hwif;
 559         int err = -EPERM;
 560
 561         if (arg < 0 || arg > 1)
 562                 return -EINVAL;
 563
 564         if (!drive->id || !(drive->id->capability & 1))
 565                 goto out;
 566
 567         if (hwif->dma_host_set == NULL)
 568                 goto out;
 569
 570         err = -EBUSY;
 571         if (ide_spin_wait_hwgroup(drive))
 572                 goto out;
 573         /*
 574          * set ->busy flag, unlock and let it ride
 575          */
 576         hwif->hwgroup->busy = 1;
 577         spin_unlock_irq(&ide_lock);
 578
 579         err = 0;
 580
 581         if (arg) {
 582                 if (ide_set_dma(drive))
 583                         err = -EIO;
 584         } else
 585                 ide_dma_off(drive);
 586
 587         /*
 588          * lock, clear ->busy flag and unlock before leaving
 589          */
 590         spin_lock_irq(&ide_lock);
 591         hwif->hwgroup->busy = 0;
 592         spin_unlock_irq(&ide_lock);
 593 out:
 594         return err;
 595 #else
 596         if (arg < 0 || arg > 1)
 597                 return -EINVAL;
 598
 599         return -EPERM;
 600 #endif
 601 }
 602
 603 int set_pio_mode(ide_drive_t *drive, int arg)
 604 {
 605         struct request rq;
 606
 607         if (arg < 0 || arg > 255)
 608                 return -EINVAL;
 609
 610         if (drive->hwif->set_pio_mode == NULL)
 611                 return -ENOSYS;
 612
 613         if (drive->special.b.set_tune)
 614                 return -EBUSY;
 615
 616         ide_init_drive_cmd(&rq);
 617         rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
 618
 619         drive->tune_req = (u8) arg;
 620         drive->special.b.set_tune = 1;
 621         (void) ide_do_drive_cmd(drive, &rq, ide_wait);
 622         return 0;
 623 }
 624
 625 static int set_unmaskirq(ide_drive_t *drive, int arg)
 626 {
 627         if (drive->no_unmask)
 628                 return -EPERM;
 629
 630         if (arg < 0 || arg > 1)
 631                 return -EINVAL;
 632
 633         if (ide_spin_wait_hwgroup(drive))
 634                 return -EBUSY;
 635         drive->unmask = arg;
 636         spin_unlock_irq(&ide_lock);
 637
 638         return 0;
 639 }
 640
 641 /**
 642  *      system_bus_clock        -       clock guess
 643  *
 644  *      External version of the bus clock guess used by very old IDE drivers
 645  *      for things like VLB timings. Should not be used.
 646  */
 647
 648 int system_bus_clock (void)
 649 {
 650         return system_bus_speed;
 651 }
 652
 653 EXPORT_SYMBOL(system_bus_clock);
 654
 655 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
 656 {
 657         ide_drive_t *drive = dev->driver_data;
 658         ide_hwif_t *hwif = HWIF(drive);
 659         struct request rq;
 660         struct request_pm_state rqpm;
 661         ide_task_t args;
 662         int ret;
 663
 664         /* Call ACPI _GTM only once */
 665         if (!(drive->dn % 2))
 666                 ide_acpi_get_timing(hwif);
 667
 668         memset(&rq, 0, sizeof(rq));
 669         memset(&rqpm, 0, sizeof(rqpm));
 670         memset(&args, 0, sizeof(args));
 671         rq.cmd_type = REQ_TYPE_PM_SUSPEND;
 672         rq.special = &args;
 673         rq.data = &rqpm;
 674         rqpm.pm_step = ide_pm_state_start_suspend;
 675         if (mesg.event == PM_EVENT_PRETHAW)
 676                 mesg.event = PM_EVENT_FREEZE;
 677         rqpm.pm_state = mesg.event;
 678
 679         ret = ide_do_drive_cmd(drive, &rq, ide_wait);
 680         /* only call ACPI _PS3 after both drivers are suspended */
 681         if (!ret && (((drive->dn % 2) && hwif->drives[0].present
 682                  && hwif->drives[1].present)
 683                  || !hwif->drives[0].present
 684                  || !hwif->drives[1].present))
 685                 ide_acpi_set_state(hwif, 0);
 686         return ret;
 687 }
 688
 689 static int generic_ide_resume(struct device *dev)
 690 {
 691         ide_drive_t *drive = dev->driver_data;
 692         ide_hwif_t *hwif = HWIF(drive);
 693         struct request rq;
 694         struct request_pm_state rqpm;
 695         ide_task_t args;
 696         int err;
 697
 698         /* Call ACPI _STM only once */
 699         if (!(drive->dn % 2)) {
 700                 ide_acpi_set_state(hwif, 1);
 701                 ide_acpi_push_timing(hwif);
 702         }
 703
 704         ide_acpi_exec_tfs(drive);
 705
 706         memset(&rq, 0, sizeof(rq));
 707         memset(&rqpm, 0, sizeof(rqpm));
 708         memset(&args, 0, sizeof(args));
 709         rq.cmd_type = REQ_TYPE_PM_RESUME;
 710         rq.special = &args;
 711         rq.data = &rqpm;
 712         rqpm.pm_step = ide_pm_state_start_resume;
 713         rqpm.pm_state = PM_EVENT_ON;
 714
 715         err = ide_do_drive_cmd(drive, &rq, ide_head_wait);
 716
 717         if (err == 0 && dev->driver) {
 718                 ide_driver_t *drv = to_ide_driver(dev->driver);
 719
 720                 if (drv->resume)
 721                         drv->resume(drive);
 722         }
 723
 724         return err;
 725 }
 726
 727 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
 728                         unsigned int cmd, unsigned long arg)
 729 {
 730         unsigned long flags;
 731         ide_driver_t *drv;
 732         void __user *p = (void __user *)arg;
 733         int err = 0, (*setfunc)(ide_drive_t *, int);
 734         u8 *val;
 735
 736         switch (cmd) {
 737         case HDIO_GET_32BIT:        val = &drive->io_32bit;      goto read_val;
 738         case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
 739         case HDIO_GET_UNMASKINTR:   val = &drive->unmask;        goto read_val;
 740         case HDIO_GET_DMA:          val = &drive->using_dma;     goto read_val;
 741         case HDIO_SET_32BIT:        setfunc = set_io_32bit;      goto set_val;
 742         case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings;     goto set_val;
 743         case HDIO_SET_PIO_MODE:     setfunc = set_pio_mode;      goto set_val;
 744         case HDIO_SET_UNMASKINTR:   setfunc = set_unmaskirq;     goto set_val;
 745         case HDIO_SET_DMA:          setfunc = set_using_dma;     goto set_val;
 746         }
 747
 748         switch (cmd) {
 749                 case HDIO_OBSOLETE_IDENTITY:
 750                 case HDIO_GET_IDENTITY:
 751                         if (bdev != bdev->bd_contains)
 752                                 return -EINVAL;
 753                         if (drive->id_read == 0)
 754                                 return -ENOMSG;
 755                         if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
 756                                 return -EFAULT;
 757                         return 0;
 758
 759                 case HDIO_GET_NICE:
 760                         return put_user(drive->dsc_overlap      <<      IDE_NICE_DSC_OVERLAP    |
 761                                         drive->atapi_overlap    <<      IDE_NICE_ATAPI_OVERLAP  |
 762                                         drive->nice1 << IDE_NICE_1,
 763                                         (long __user *) arg);
 764 #ifdef CONFIG_IDE_TASK_IOCTL
 765                 case HDIO_DRIVE_TASKFILE:
 766                         if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
 767                                 return -EACCES;
 768                         switch(drive->media) {
 769                                 case ide_disk:
 770                                         return ide_taskfile_ioctl(drive, cmd, arg);
 771                                 default:
 772                                         return -ENOMSG;
 773                         }
 774 #endif /* CONFIG_IDE_TASK_IOCTL */
 775
 776                 case HDIO_DRIVE_CMD:
 777                         if (!capable(CAP_SYS_RAWIO))
 778                                 return -EACCES;
 779                         return ide_cmd_ioctl(drive, cmd, arg);
 780
 781                 case HDIO_DRIVE_TASK:
 782                         if (!capable(CAP_SYS_RAWIO))
 783                                 return -EACCES;
 784                         return ide_task_ioctl(drive, cmd, arg);
 785                 case HDIO_SET_NICE:
 786                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
 787                         if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
 788                                 return -EPERM;
 789                         drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
 790                         drv = *(ide_driver_t **)bdev->bd_disk->private_data;
 791                         if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
 792                                 drive->dsc_overlap = 0;
 793                                 return -EPERM;
 794                         }
 795                         drive->nice1 = (arg >> IDE_NICE_1) & 1;
 796                         return 0;
 797                 case HDIO_DRIVE_RESET:
 798                         if (!capable(CAP_SYS_ADMIN))
 799                                 return -EACCES;
 800
 801                         /*
 802                          *      Abort the current command on the
 803                          *      group if there is one, taking
 804                          *      care not to allow anything else
 805                          *      to be queued and to die on the
 806                          *      spot if we miss one somehow
 807                          */
 808
 809                         spin_lock_irqsave(&ide_lock, flags);
 810
 811                         if (HWGROUP(drive)->resetting) {
 812                                 spin_unlock_irqrestore(&ide_lock, flags);
 813                                 return -EBUSY;
 814                         }
 815
 816                         ide_abort(drive, "drive reset");
 817
 818                         BUG_ON(HWGROUP(drive)->handler);
 819
 820                         /* Ensure nothing gets queued after we
 821                            drop the lock. Reset will clear the busy */
 822
 823                         HWGROUP(drive)->busy = 1;
 824                         spin_unlock_irqrestore(&ide_lock, flags);
 825                         (void) ide_do_reset(drive);
 826
 827                         return 0;
 828                 case HDIO_GET_BUSSTATE:
 829                         if (!capable(CAP_SYS_ADMIN))
 830                                 return -EACCES;
 831                         if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
 832                                 return -EFAULT;
 833                         return 0;
 834
 835                 case HDIO_SET_BUSSTATE:
 836                         if (!capable(CAP_SYS_ADMIN))
 837                                 return -EACCES;
 838                         return -EOPNOTSUPP;
 839                 default:
 840                         return -EINVAL;
 841         }
 842
 843 read_val:
 844         mutex_lock(&ide_setting_mtx);
 845         spin_lock_irqsave(&ide_lock, flags);
 846         err = *val;
 847         spin_unlock_irqrestore(&ide_lock, flags);
 848         mutex_unlock(&ide_setting_mtx);
 849         return err >= 0 ? put_user(err, (long __user *)arg) : err;
 850
 851 set_val:
 852         if (bdev != bdev->bd_contains)
 853                 err = -EINVAL;
 854         else {
 855                 if (!capable(CAP_SYS_ADMIN))
 856                         err = -EACCES;
 857                 else {
 858                         mutex_lock(&ide_setting_mtx);
 859                         err = setfunc(drive, arg);
 860                         mutex_unlock(&ide_setting_mtx);
 861                 }
 862         }
 863         return err;
 864 }
 865
 866 EXPORT_SYMBOL(generic_ide_ioctl);
 867
 868 /*
 869  * stridx() returns the offset of c within s,
 870  * or -1 if c is '\0' or not found within s.
 871  */
 872 static int __init stridx (const char *s, char c)
 873 {
 874         char *i = strchr(s, c);
 875         return (i && c) ? i - s : -1;
 876 }
 877
 878 /*
 879  * match_parm() does parsing for ide_setup():
 880  *
 881  * 1. the first char of s must be '='.
 882  * 2. if the remainder matches one of the supplied keywords,
 883  *     the index (1 based) of the keyword is negated and returned.
 884  * 3. if the remainder is a series of no more than max_vals numbers
 885  *     separated by commas, the numbers are saved in vals[] and a
 886  *     count of how many were saved is returned.  Base10 is assumed,
 887  *     and base16 is allowed when prefixed with "0x".
 888  * 4. otherwise, zero is returned.
 889  */
 890 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
 891 {
 892         static const char *decimal = "0123456789";
 893         static const char *hex = "0123456789abcdef";
 894         int i, n;
 895
 896         if (*s++ == '=') {
 897                 /*
 898                  * Try matching against the supplied keywords,
 899                  * and return -(index+1) if we match one
 900                  */
 901                 if (keywords != NULL) {
 902                         for (i = 0; *keywords != NULL; ++i) {
 903                                 if (!strcmp(s, *keywords++))
 904                                         return -(i+1);
 905                         }
 906                 }
 907                 /*
 908                  * Look for a series of no more than "max_vals"
 909                  * numeric values separated by commas, in base10,
 910                  * or base16 when prefixed with "0x".
 911                  * Return a count of how many were found.
 912                  */
 913                 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
 914                         vals[n] = i;
 915                         while ((i = stridx(decimal, *++s)) >= 0)
 916                                 vals[n] = (vals[n] * 10) + i;
 917                         if (*s == 'x' && !vals[n]) {
 918                                 while ((i = stridx(hex, *++s)) >= 0)
 919                                         vals[n] = (vals[n] * 0x10) + i;
 920                         }
 921                         if (++n == max_vals)
 922                                 break;
 923                         if (*s == ',' || *s == ';')
 924                                 ++s;
 925                 }
 926                 if (!*s)
 927                         return n;
 928         }
 929         return 0;       /* zero = nothing matched */
 930 }
 931
 932 extern int probe_ali14xx;
 933 extern int probe_umc8672;
 934 extern int probe_dtc2278;
 935 extern int probe_ht6560b;
 936 extern int probe_qd65xx;
 937 extern int cmd640_vlb;
 938 extern int probe_4drives;
 939
 940 static int __initdata is_chipset_set;
 941
 942 /*
 943  * ide_setup() gets called VERY EARLY during initialization,
 944  * to handle kernel "command line" strings beginning with "hdx=" or "ide".
 945  *
 946  * Remember to update Documentation/ide/ide.txt if you change something here.
 947  */
 948 static int __init ide_setup(char *s)
 949 {
 950         int i, vals[3];
 951         ide_hwif_t *hwif;
 952         ide_drive_t *drive;
 953         unsigned int hw, unit;
 954         const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
 955         const char max_hwif  = '0' + (MAX_HWIFS - 1);
 956
 957
 958         if (strncmp(s,"hd",2) == 0 && s[2] == '=')      /* hd= is for hd.c   */
 959                 return 0;                               /* driver and not us */
 960
 961         if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
 962                 return 0;
 963
 964         printk(KERN_INFO "ide_setup: %s", s);
 965         init_ide_data ();
 966
 967 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
 968         if (!strcmp(s, "ide=doubler")) {
 969                 extern int ide_doubler;
 970
 971                 printk(" : Enabled support for IDE doublers\n");
 972                 ide_doubler = 1;
 973                 return 1;
 974         }
 975 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
 976
 977         if (!strcmp(s, "ide=nodma")) {
 978                 printk(" : Prevented DMA\n");
 979                 noautodma = 1;
 980                 goto obsolete_option;
 981         }
 982
 983 #ifdef CONFIG_BLK_DEV_IDEACPI
 984         if (!strcmp(s, "ide=noacpi")) {
 985                 //printk(" : Disable IDE ACPI support.\n");
 986                 ide_noacpi = 1;
 987                 return 1;
 988         }
 989         if (!strcmp(s, "ide=acpigtf")) {
 990                 //printk(" : Enable IDE ACPI _GTF support.\n");
 991                 ide_noacpitfs = 0;
 992                 return 1;
 993         }
 994         if (!strcmp(s, "ide=acpionboot")) {
 995                 //printk(" : Call IDE ACPI methods on boot.\n");
 996                 ide_noacpionboot = 0;
 997                 return 1;
 998         }
 999 #endif /* CONFIG_BLK_DEV_IDEACPI */
1000
1001         /*
1002          * Look for drive options:  "hdx="
1003          */
1004         if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1005                 const char *hd_words[] = {
1006                         "none", "noprobe", "nowerr", "cdrom", "nodma",
1007                         "autotune", "noautotune", "-8", "-9", "-10",
1008                         "noflush", "remap", "remap63", "scsi", NULL };
1009                 unit = s[2] - 'a';
1010                 hw   = unit / MAX_DRIVES;
1011                 unit = unit % MAX_DRIVES;
1012                 hwif = &ide_hwifs[hw];
1013                 drive = &hwif->drives[unit];
1014                 if (strncmp(s + 4, "ide-", 4) == 0) {
1015                         strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1016                         goto obsolete_option;
1017                 }
1018                 switch (match_parm(&s[3], hd_words, vals, 3)) {
1019                         case -1: /* "none" */
1020                         case -2: /* "noprobe" */
1021                                 drive->noprobe = 1;
1022                                 goto done;
1023                         case -3: /* "nowerr" */
1024                                 drive->bad_wstat = BAD_R_STAT;
1025                                 hwif->noprobe = 0;
1026                                 goto done;
1027                         case -4: /* "cdrom" */
1028                                 drive->present = 1;
1029                                 drive->media = ide_cdrom;
1030                                 /* an ATAPI device ignores DRDY */
1031                                 drive->ready_stat = 0;
1032                                 hwif->noprobe = 0;
1033                                 goto done;
1034                         case -5: /* nodma */
1035                                 drive->nodma = 1;
1036                                 goto done;
1037                         case -6: /* "autotune" */
1038                                 drive->autotune = IDE_TUNE_AUTO;
1039                                 goto obsolete_option;
1040                         case -7: /* "noautotune" */
1041                                 drive->autotune = IDE_TUNE_NOAUTO;
1042                                 goto obsolete_option;
1043                         case -11: /* noflush */
1044                                 drive->noflush = 1;
1045                                 goto done;
1046                         case -12: /* "remap" */
1047                                 drive->remap_0_to_1 = 1;
1048                                 goto obsolete_option;
1049                         case -13: /* "remap63" */
1050                                 drive->sect0 = 63;
1051                                 goto obsolete_option;
1052                         case -14: /* "scsi" */
1053                                 drive->scsi = 1;
1054                                 goto obsolete_option;
1055                         case 3: /* cyl,head,sect */
1056                                 drive->media    = ide_disk;
1057                                 drive->ready_stat = READY_STAT;
1058                                 drive->cyl      = drive->bios_cyl  = vals[0];
1059                                 drive->head     = drive->bios_head = vals[1];
1060                                 drive->sect     = drive->bios_sect = vals[2];
1061                                 drive->present  = 1;
1062                                 drive->forced_geom = 1;
1063                                 hwif->noprobe = 0;
1064                                 goto done;
1065                         default:
1066                                 goto bad_option;
1067                 }
1068         }
1069
1070         if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1071                 goto bad_option;
1072         /*
1073          * Look for bus speed option:  "idebus="
1074          */
1075         if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1076                 if (match_parm(&s[6], NULL, vals, 1) != 1)
1077                         goto bad_option;
1078                 if (vals[0] >= 20 && vals[0] <= 66) {
1079                         idebus_parameter = vals[0];
1080                 } else
1081                         printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1082                 goto done;
1083         }
1084         /*
1085          * Look for interface options:  "idex="
1086          */
1087         if (s[3] >= '0' && s[3] <= max_hwif) {
1088                 /*
1089                  * Be VERY CAREFUL changing this: note hardcoded indexes below
1090                  * (-8, -9, -10) are reserved to ease the hardcoding.
1091                  */
1092                 static const char *ide_words[] = {
1093                         "minus1", "serialize", "minus3", "minus4",
1094                         "reset", "minus6", "ata66", "minus8", "minus9",
1095                         "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1096                         "dtc2278", "umc8672", "ali14xx", NULL };
1097
1098                 hw = s[3] - '0';
1099                 hwif = &ide_hwifs[hw];
1100                 i = match_parm(&s[4], ide_words, vals, 3);
1101
1102                 /*
1103                  * Cryptic check to ensure chipset not already set for hwif.
1104                  * Note: we can't depend on hwif->chipset here.
1105                  */
1106                 if (i >= -18 && i <= -11) {
1107                         /* chipset already specified */
1108                         if (is_chipset_set)
1109                                 goto bad_option;
1110                         /* these drivers are for "ide0=" only */
1111                         if (hw != 0)
1112                                 goto bad_hwif;
1113                         is_chipset_set = 1;
1114                         printk("\n");
1115                 }
1116
1117                 switch (i) {
1118 #ifdef CONFIG_BLK_DEV_ALI14XX
1119                         case -17: /* "ali14xx" */
1120                                 probe_ali14xx = 1;
1121                                 goto obsolete_option;
1122 #endif
1123 #ifdef CONFIG_BLK_DEV_UMC8672
1124                         case -16: /* "umc8672" */
1125                                 probe_umc8672 = 1;
1126                                 goto obsolete_option;
1127 #endif
1128 #ifdef CONFIG_BLK_DEV_DTC2278
1129                         case -15: /* "dtc2278" */
1130                                 probe_dtc2278 = 1;
1131                                 goto obsolete_option;
1132 #endif
1133 #ifdef CONFIG_BLK_DEV_CMD640
1134                         case -14: /* "cmd640_vlb" */
1135                                 cmd640_vlb = 1;
1136                                 goto obsolete_option;
1137 #endif
1138 #ifdef CONFIG_BLK_DEV_HT6560B
1139                         case -13: /* "ht6560b" */
1140                                 probe_ht6560b = 1;
1141                                 goto obsolete_option;
1142 #endif
1143 #ifdef CONFIG_BLK_DEV_QD65XX
1144                         case -12: /* "qd65xx" */
1145                                 probe_qd65xx = 1;
1146                                 goto obsolete_option;
1147 #endif
1148 #ifdef CONFIG_BLK_DEV_4DRIVES
1149                         case -11: /* "four" drives on one set of ports */
1150                                 probe_4drives = 1;
1151                                 goto obsolete_option;
1152 #endif
1153                         case -10: /* minus10 */
1154                         case -9: /* minus9 */
1155                         case -8: /* minus8 */
1156                         case -6:
1157                         case -4:
1158                         case -3:
1159                                 goto bad_option;
1160                         case -7: /* ata66 */
1161 #ifdef CONFIG_BLK_DEV_IDEPCI
1162                                 /*
1163                                  * Use ATA_CBL_PATA40_SHORT so drive side
1164                                  * cable detection is also overriden.
1165                                  */
1166                                 hwif->cbl = ATA_CBL_PATA40_SHORT;
1167                                 goto obsolete_option;
1168 #else
1169                                 goto bad_hwif;
1170 #endif
1171                         case -5: /* "reset" */
1172                                 hwif->reset = 1;
1173                                 goto obsolete_option;
1174                         case -2: /* "serialize" */
1175                                 hwif->mate = &ide_hwifs[hw^1];
1176                                 hwif->mate->mate = hwif;
1177                                 hwif->serialized = hwif->mate->serialized = 1;
1178                                 goto obsolete_option;
1179
1180                         case -1:
1181                         case 0:
1182                         case 1:
1183                         case 2:
1184                         case 3:
1185                                 goto bad_option;
1186                         default:
1187                                 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1188                                 return 1;
1189                 }
1190         }
1191 bad_option:
1192         printk(" -- BAD OPTION\n");
1193         return 1;
1194 obsolete_option:
1195         printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1196         return 1;
1197 bad_hwif:
1198         printk("-- NOT SUPPORTED ON ide%d", hw);
1199 done:
1200         printk("\n");
1201         return 1;
1202 }
1203
1204 EXPORT_SYMBOL(ide_lock);
1205
1206 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1207 {
1208         return 1;
1209 }
1210
1211 static char *media_string(ide_drive_t *drive)
1212 {
1213         switch (drive->media) {
1214         case ide_disk:
1215                 return "disk";
1216         case ide_cdrom:
1217                 return "cdrom";
1218         case ide_tape:
1219                 return "tape";
1220         case ide_floppy:
1221                 return "floppy";
1222         case ide_optical:
1223                 return "optical";
1224         default:
1225                 return "UNKNOWN";
1226         }
1227 }
1228
1229 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1230 {
1231         ide_drive_t *drive = to_ide_device(dev);
1232         return sprintf(buf, "%s\n", media_string(drive));
1233 }
1234
1235 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1236 {
1237         ide_drive_t *drive = to_ide_device(dev);
1238         return sprintf(buf, "%s\n", drive->name);
1239 }
1240
1241 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1242 {
1243         ide_drive_t *drive = to_ide_device(dev);
1244         return sprintf(buf, "ide:m-%s\n", media_string(drive));
1245 }
1246
1247 static ssize_t model_show(struct device *dev, struct device_attribute *attr,
1248                           char *buf)
1249 {
1250         ide_drive_t *drive = to_ide_device(dev);
1251         return sprintf(buf, "%s\n", drive->id->model);
1252 }
1253
1254 static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
1255                              char *buf)
1256 {
1257         ide_drive_t *drive = to_ide_device(dev);
1258         return sprintf(buf, "%s\n", drive->id->fw_rev);
1259 }
1260
1261 static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
1262                            char *buf)
1263 {
1264         ide_drive_t *drive = to_ide_device(dev);
1265         return sprintf(buf, "%s\n", drive->id->serial_no);
1266 }
1267
1268 static struct device_attribute ide_dev_attrs[] = {
1269         __ATTR_RO(media),
1270         __ATTR_RO(drivename),
1271         __ATTR_RO(modalias),
1272         __ATTR_RO(model),
1273         __ATTR_RO(firmware),
1274         __ATTR(serial, 0400, serial_show, NULL),
1275         __ATTR_NULL
1276 };
1277
1278 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
1279 {
1280         ide_drive_t *drive = to_ide_device(dev);
1281
1282         add_uevent_var(env, "MEDIA=%s", media_string(drive));
1283         add_uevent_var(env, "DRIVENAME=%s", drive->name);
1284         add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
1285         return 0;
1286 }
1287
1288 static int generic_ide_probe(struct device *dev)
1289 {
1290         ide_drive_t *drive = to_ide_device(dev);
1291         ide_driver_t *drv = to_ide_driver(dev->driver);
1292
1293         return drv->probe ? drv->probe(drive) : -ENODEV;
1294 }
1295
1296 static int generic_ide_remove(struct device *dev)
1297 {
1298         ide_drive_t *drive = to_ide_device(dev);
1299         ide_driver_t *drv = to_ide_driver(dev->driver);
1300
1301         if (drv->remove)
1302                 drv->remove(drive);
1303
1304         return 0;
1305 }
1306
1307 static void generic_ide_shutdown(struct device *dev)
1308 {
1309         ide_drive_t *drive = to_ide_device(dev);
1310         ide_driver_t *drv = to_ide_driver(dev->driver);
1311
1312         if (dev->driver && drv->shutdown)
1313                 drv->shutdown(drive);
1314 }
1315
1316 struct bus_type ide_bus_type = {
1317         .name           = "ide",
1318         .match          = ide_bus_match,
1319         .uevent         = ide_uevent,
1320         .probe          = generic_ide_probe,
1321         .remove         = generic_ide_remove,
1322         .shutdown       = generic_ide_shutdown,
1323         .dev_attrs      = ide_dev_attrs,
1324         .suspend        = generic_ide_suspend,
1325         .resume         = generic_ide_resume,
1326 };
1327
1328 EXPORT_SYMBOL_GPL(ide_bus_type);
1329
1330 static void ide_port_class_release(struct device *portdev)
1331 {
1332         ide_hwif_t *hwif = dev_get_drvdata(portdev);
1333
1334         put_device(&hwif->gendev);
1335 }
1336
1337 /*
1338  * This is gets invoked once during initialization, to set *everything* up
1339  */
1340 static int __init ide_init(void)
1341 {
1342         int ret;
1343
1344         printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n");
1345         system_bus_speed = ide_system_bus_speed();
1346
1347         printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
1348                          "for PIO modes%s\n", system_bus_speed,
1349                         idebus_parameter ? "" : "; override with idebus=xx");
1350
1351         ret = bus_register(&ide_bus_type);
1352         if (ret < 0) {
1353                 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1354                 return ret;
1355         }
1356
1357         ide_port_class = class_create(THIS_MODULE, "ide_port");
1358         if (IS_ERR(ide_port_class)) {
1359                 ret = PTR_ERR(ide_port_class);
1360                 goto out_port_class;
1361         }
1362         ide_port_class->dev_release = ide_port_class_release;
1363
1364         init_ide_data();
1365
1366         proc_ide_create();
1367
1368         return 0;
1369
1370 out_port_class:
1371         bus_unregister(&ide_bus_type);
1372
1373         return ret;
1374 }
1375
1376 #ifdef MODULE
1377 static char *options = NULL;
1378 module_param(options, charp, 0);
1379 MODULE_LICENSE("GPL");
1380
1381 static void __init parse_options (char *line)
1382 {
1383         char *next = line;
1384
1385         if (line == NULL || !*line)
1386                 return;
1387         while ((line = next) != NULL) {
1388                 if ((next = strchr(line,' ')) != NULL)
1389                         *next++ = 0;
1390                 if (!ide_setup(line))
1391                         printk (KERN_INFO "Unknown option '%s'\n", line);
1392         }
1393 }
1394
1395 int __init init_module (void)
1396 {
1397         parse_options(options);
1398         return ide_init();
1399 }
1400
1401 void __exit cleanup_module (void)
1402 {
1403         int index;
1404
1405         for (index = 0; index < MAX_HWIFS; ++index)
1406                 ide_unregister(index);
1407
1408         proc_ide_destroy();
1409
1410         class_destroy(ide_port_class);
1411
1412         bus_unregister(&ide_bus_type);
1413 }
1414
1415 #else /* !MODULE */
1416
1417 __setup("", ide_setup);
1418
1419 module_init(ide_init);
1420
1421 #endif /* MODULE */