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   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 /*
 170  * init_ide_data() sets reasonable default values into all fields
 171  * of all instances of the hwifs and drives, but only on the first call.
 172  * Subsequent calls have no effect (they don't wipe out anything).
 173  *
 174  * This routine is normally called at driver initialization time,
 175  * but may also be called MUCH earlier during kernel "command-line"
 176  * parameter processing.  As such, we cannot depend on any other parts
 177  * of the kernel (such as memory allocation) to be functioning yet.
 178  *
 179  * This is too bad, as otherwise we could dynamically allocate the
 180  * ide_drive_t structs as needed, rather than always consuming memory
 181  * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
 182  *
 183  * FIXME: We should stuff the setup data into __init and copy the
 184  * relevant hwifs/allocate them properly during boot.
 185  */
 186 #define MAGIC_COOKIE 0x12345678
 187 static void __init init_ide_data (void)
 188 {
 189         unsigned int index;
 190         static unsigned long magic_cookie = MAGIC_COOKIE;
 191         hw_regs_t hw;
 192
 193         if (magic_cookie != MAGIC_COOKIE)
 194                 return;         /* already initialized */
 195         magic_cookie = 0;
 196
 197         /* Initialise all interface structures */
 198         for (index = 0; index < MAX_HWIFS; ++index) {
 199                 ide_hwif_t *hwif = &ide_hwifs[index];
 200
 201                 ide_init_port_data(hwif, index);
 202
 203                 memset(&hw, 0, sizeof(hw));
 204                 ide_init_hwif_ports(&hw, ide_default_io_base(index), 0,
 205                                     &hwif->irq);
 206                 memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
 207                 hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
 208 #if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
 209                 hwif->irq =
 210                         ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
 211 #endif
 212         }
 213 }
 214
 215 /**
 216  *      ide_system_bus_speed    -       guess bus speed
 217  *
 218  *      ide_system_bus_speed() returns what we think is the system VESA/PCI
 219  *      bus speed (in MHz). This is used for calculating interface PIO timings.
 220  *      The default is 40 for known PCI systems, 50 otherwise.
 221  *      The "idebus=xx" parameter can be used to override this value.
 222  *      The actual value to be used is computed/displayed the first time
 223  *      through. Drivers should only use this as a last resort.
 224  *
 225  *      Returns a guessed speed in MHz.
 226  */
 227
 228 static int ide_system_bus_speed(void)
 229 {
 230 #ifdef CONFIG_PCI
 231         static struct pci_device_id pci_default[] = {
 232                 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
 233                 { }
 234         };
 235 #else
 236 #define pci_default 0
 237 #endif /* CONFIG_PCI */
 238
 239         /* user supplied value */
 240         if (idebus_parameter)
 241                 return idebus_parameter;
 242
 243         /* safe default value for PCI or VESA and PCI*/
 244         return pci_dev_present(pci_default) ? 33 : 50;
 245 }
 246
 247 ide_hwif_t * ide_find_port(unsigned long base)
 248 {
 249         ide_hwif_t *hwif;
 250         int i;
 251
 252         for (i = 0; i < MAX_HWIFS; i++) {
 253                 hwif = &ide_hwifs[i];
 254                 if (hwif->io_ports[IDE_DATA_OFFSET] == base)
 255                         goto found;
 256         }
 257
 258         for (i = 0; i < MAX_HWIFS; i++) {
 259                 hwif = &ide_hwifs[i];
 260                 if (hwif->chipset == ide_unknown)
 261                         goto found;
 262         }
 263
 264         hwif = NULL;
 265 found:
 266         return hwif;
 267 }
 268
 269 EXPORT_SYMBOL_GPL(ide_find_port);
 270
 271 static struct resource* hwif_request_region(ide_hwif_t *hwif,
 272                                             unsigned long addr, int num)
 273 {
 274         struct resource *res = request_region(addr, num, hwif->name);
 275
 276         if (!res)
 277                 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
 278                                 hwif->name, addr, addr+num-1);
 279         return res;
 280 }
 281
 282 /**
 283  *      ide_hwif_request_regions - request resources for IDE
 284  *      @hwif: interface to use
 285  *
 286  *      Requests all the needed resources for an interface.
 287  *      Right now core IDE code does this work which is deeply wrong.
 288  *      MMIO leaves it to the controller driver,
 289  *      PIO will migrate this way over time.
 290  */
 291
 292 int ide_hwif_request_regions(ide_hwif_t *hwif)
 293 {
 294         unsigned long addr;
 295         unsigned int i;
 296
 297         if (hwif->mmio)
 298                 return 0;
 299         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
 300         if (addr && !hwif_request_region(hwif, addr, 1))
 301                 goto control_region_busy;
 302         hwif->straight8 = 0;
 303         addr = hwif->io_ports[IDE_DATA_OFFSET];
 304         if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
 305                 if (!hwif_request_region(hwif, addr, 8))
 306                         goto data_region_busy;
 307                 hwif->straight8 = 1;
 308                 return 0;
 309         }
 310         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
 311                 addr = hwif->io_ports[i];
 312                 if (!hwif_request_region(hwif, addr, 1)) {
 313                         while (--i)
 314                                 release_region(addr, 1);
 315                         goto data_region_busy;
 316                 }
 317         }
 318         return 0;
 319
 320 data_region_busy:
 321         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
 322         if (addr)
 323                 release_region(addr, 1);
 324 control_region_busy:
 325         /* If any errors are return, we drop the hwif interface. */
 326         return -EBUSY;
 327 }
 328
 329 /**
 330  *      ide_hwif_release_regions - free IDE resources
 331  *
 332  *      Note that we only release the standard ports,
 333  *      and do not even try to handle any extra ports
 334  *      allocated for weird IDE interface chipsets.
 335  *
 336  *      Note also that we don't yet handle mmio resources here. More
 337  *      importantly our caller should be doing this so we need to
 338  *      restructure this as a helper function for drivers.
 339  */
 340
 341 void ide_hwif_release_regions(ide_hwif_t *hwif)
 342 {
 343         u32 i = 0;
 344
 345         if (hwif->mmio)
 346                 return;
 347         if (hwif->io_ports[IDE_CONTROL_OFFSET])
 348                 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
 349         if (hwif->straight8) {
 350                 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
 351                 return;
 352         }
 353         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
 354                 if (hwif->io_ports[i])
 355                         release_region(hwif->io_ports[i], 1);
 356 }
 357
 358 void ide_remove_port_from_hwgroup(ide_hwif_t *hwif)
 359 {
 360         ide_hwgroup_t *hwgroup = hwif->hwgroup;
 361
 362         spin_lock_irq(&ide_lock);
 363         /*
 364          * Remove us from the hwgroup, and free
 365          * the hwgroup if we were the only member
 366          */
 367         if (hwif->next == hwif) {
 368                 BUG_ON(hwgroup->hwif != hwif);
 369                 kfree(hwgroup);
 370         } else {
 371                 /* There is another interface in hwgroup.
 372                  * Unlink us, and set hwgroup->drive and ->hwif to
 373                  * something sane.
 374                  */
 375                 ide_hwif_t *g = hwgroup->hwif;
 376
 377                 while (g->next != hwif)
 378                         g = g->next;
 379                 g->next = hwif->next;
 380                 if (hwgroup->hwif == hwif) {
 381                         /* Chose a random hwif for hwgroup->hwif.
 382                          * It's guaranteed that there are no drives
 383                          * left in the hwgroup.
 384                          */
 385                         BUG_ON(hwgroup->drive != NULL);
 386                         hwgroup->hwif = g;
 387                 }
 388                 BUG_ON(hwgroup->hwif == hwif);
 389         }
 390         spin_unlock_irq(&ide_lock);
 391 }
 392
 393 /* Called with ide_lock held. */
 394 static void __ide_port_unregister_devices(ide_hwif_t *hwif)
 395 {
 396         int i;
 397
 398         for (i = 0; i < MAX_DRIVES; i++) {
 399                 ide_drive_t *drive = &hwif->drives[i];
 400
 401                 if (drive->present) {
 402                         spin_unlock_irq(&ide_lock);
 403                         device_unregister(&drive->gendev);
 404                         wait_for_completion(&drive->gendev_rel_comp);
 405                         spin_lock_irq(&ide_lock);
 406                 }
 407         }
 408 }
 409
 410 void ide_port_unregister_devices(ide_hwif_t *hwif)
 411 {
 412         mutex_lock(&ide_cfg_mtx);
 413         spin_lock_irq(&ide_lock);
 414         __ide_port_unregister_devices(hwif);
 415         hwif->present = 0;
 416         ide_port_init_devices_data(hwif);
 417         spin_unlock_irq(&ide_lock);
 418         mutex_unlock(&ide_cfg_mtx);
 419 }
 420 EXPORT_SYMBOL_GPL(ide_port_unregister_devices);
 421
 422 /**
 423  *      ide_unregister          -       free an IDE interface
 424  *      @index: index of interface (will change soon to a pointer)
 425  *
 426  *      Perform the final unregister of an IDE interface. At the moment
 427  *      we don't refcount interfaces so this will also get split up.
 428  *
 429  *      Locking:
 430  *      The caller must not hold the IDE locks
 431  *      The drive present/vanishing is not yet properly locked
 432  *      Take care with the callbacks. These have been split to avoid
 433  *      deadlocking the IDE layer. The shutdown callback is called
 434  *      before we take the lock and free resources. It is up to the
 435  *      caller to be sure there is no pending I/O here, and that
 436  *      the interface will not be reopened (present/vanishing locking
 437  *      isn't yet done BTW). After we commit to the final kill we
 438  *      call the cleanup callback with the ide locks held.
 439  *
 440  *      Unregister restores the hwif structures to the default state.
 441  *      This is raving bonkers.
 442  */
 443
 444 void ide_unregister(unsigned int index)
 445 {
 446         ide_hwif_t *hwif, *g;
 447         ide_hwgroup_t *hwgroup;
 448         int irq_count = 0;
 449
 450         BUG_ON(index >= MAX_HWIFS);
 451
 452         BUG_ON(in_interrupt());
 453         BUG_ON(irqs_disabled());
 454         mutex_lock(&ide_cfg_mtx);
 455         spin_lock_irq(&ide_lock);
 456         hwif = &ide_hwifs[index];
 457         if (!hwif->present)
 458                 goto abort;
 459         __ide_port_unregister_devices(hwif);
 460         hwif->present = 0;
 461
 462         spin_unlock_irq(&ide_lock);
 463
 464         ide_proc_unregister_port(hwif);
 465
 466         hwgroup = hwif->hwgroup;
 467         /*
 468          * free the irq if we were the only hwif using it
 469          */
 470         g = hwgroup->hwif;
 471         do {
 472                 if (g->irq == hwif->irq)
 473                         ++irq_count;
 474                 g = g->next;
 475         } while (g != hwgroup->hwif);
 476         if (irq_count == 1)
 477                 free_irq(hwif->irq, hwgroup);
 478
 479         ide_remove_port_from_hwgroup(hwif);
 480
 481         device_unregister(hwif->portdev);
 482         device_unregister(&hwif->gendev);
 483         wait_for_completion(&hwif->gendev_rel_comp);
 484
 485         /*
 486          * Remove us from the kernel's knowledge
 487          */
 488         blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
 489         kfree(hwif->sg_table);
 490         unregister_blkdev(hwif->major, hwif->name);
 491         spin_lock_irq(&ide_lock);
 492
 493         if (hwif->dma_base)
 494                 (void)ide_release_dma(hwif);
 495
 496         ide_hwif_release_regions(hwif);
 497
 498         /* restore hwif data to pristine status */
 499         ide_init_port_data(hwif, index);
 500
 501 abort:
 502         spin_unlock_irq(&ide_lock);
 503         mutex_unlock(&ide_cfg_mtx);
 504 }
 505
 506 EXPORT_SYMBOL(ide_unregister);
 507
 508 void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw)
 509 {
 510         memcpy(hwif->io_ports, hw->io_ports, sizeof(hwif->io_ports));
 511         hwif->irq = hw->irq;
 512         hwif->noprobe = 0;
 513         hwif->chipset = hw->chipset;
 514         hwif->gendev.parent = hw->dev;
 515         hwif->ack_intr = hw->ack_intr;
 516 }
 517 EXPORT_SYMBOL_GPL(ide_init_port_hw);
 518
 519 /*
 520  *      Locks for IDE setting functionality
 521  */
 522
 523 DEFINE_MUTEX(ide_setting_mtx);
 524
 525 EXPORT_SYMBOL_GPL(ide_setting_mtx);
 526
 527 /**
 528  *      ide_spin_wait_hwgroup   -       wait for group
 529  *      @drive: drive in the group
 530  *
 531  *      Wait for an IDE device group to go non busy and then return
 532  *      holding the ide_lock which guards the hwgroup->busy status
 533  *      and right to use it.
 534  */
 535
 536 int ide_spin_wait_hwgroup (ide_drive_t *drive)
 537 {
 538         ide_hwgroup_t *hwgroup = HWGROUP(drive);
 539         unsigned long timeout = jiffies + (3 * HZ);
 540
 541         spin_lock_irq(&ide_lock);
 542
 543         while (hwgroup->busy) {
 544                 unsigned long lflags;
 545                 spin_unlock_irq(&ide_lock);
 546                 local_irq_set(lflags);
 547                 if (time_after(jiffies, timeout)) {
 548                         local_irq_restore(lflags);
 549                         printk(KERN_ERR "%s: channel busy\n", drive->name);
 550                         return -EBUSY;
 551                 }
 552                 local_irq_restore(lflags);
 553                 spin_lock_irq(&ide_lock);
 554         }
 555         return 0;
 556 }
 557
 558 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
 559
 560 int set_io_32bit(ide_drive_t *drive, int arg)
 561 {
 562         if (drive->no_io_32bit)
 563                 return -EPERM;
 564
 565         if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
 566                 return -EINVAL;
 567
 568         if (ide_spin_wait_hwgroup(drive))
 569                 return -EBUSY;
 570
 571         drive->io_32bit = arg;
 572
 573         spin_unlock_irq(&ide_lock);
 574
 575         return 0;
 576 }
 577
 578 static int set_ksettings(ide_drive_t *drive, int arg)
 579 {
 580         if (arg < 0 || arg > 1)
 581                 return -EINVAL;
 582
 583         if (ide_spin_wait_hwgroup(drive))
 584                 return -EBUSY;
 585         drive->keep_settings = arg;
 586         spin_unlock_irq(&ide_lock);
 587
 588         return 0;
 589 }
 590
 591 int set_using_dma(ide_drive_t *drive, int arg)
 592 {
 593 #ifdef CONFIG_BLK_DEV_IDEDMA
 594         ide_hwif_t *hwif = drive->hwif;
 595         int err = -EPERM;
 596
 597         if (arg < 0 || arg > 1)
 598                 return -EINVAL;
 599
 600         if (!drive->id || !(drive->id->capability & 1))
 601                 goto out;
 602
 603         if (hwif->dma_host_set == NULL)
 604                 goto out;
 605
 606         err = -EBUSY;
 607         if (ide_spin_wait_hwgroup(drive))
 608                 goto out;
 609         /*
 610          * set ->busy flag, unlock and let it ride
 611          */
 612         hwif->hwgroup->busy = 1;
 613         spin_unlock_irq(&ide_lock);
 614
 615         err = 0;
 616
 617         if (arg) {
 618                 if (ide_set_dma(drive))
 619                         err = -EIO;
 620         } else
 621                 ide_dma_off(drive);
 622
 623         /*
 624          * lock, clear ->busy flag and unlock before leaving
 625          */
 626         spin_lock_irq(&ide_lock);
 627         hwif->hwgroup->busy = 0;
 628         spin_unlock_irq(&ide_lock);
 629 out:
 630         return err;
 631 #else
 632         if (arg < 0 || arg > 1)
 633                 return -EINVAL;
 634
 635         return -EPERM;
 636 #endif
 637 }
 638
 639 int set_pio_mode(ide_drive_t *drive, int arg)
 640 {
 641         struct request rq;
 642
 643         if (arg < 0 || arg > 255)
 644                 return -EINVAL;
 645
 646         if (drive->hwif->set_pio_mode == NULL)
 647                 return -ENOSYS;
 648
 649         if (drive->special.b.set_tune)
 650                 return -EBUSY;
 651
 652         ide_init_drive_cmd(&rq);
 653         rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
 654
 655         drive->tune_req = (u8) arg;
 656         drive->special.b.set_tune = 1;
 657         (void) ide_do_drive_cmd(drive, &rq, ide_wait);
 658         return 0;
 659 }
 660
 661 static int set_unmaskirq(ide_drive_t *drive, int arg)
 662 {
 663         if (drive->no_unmask)
 664                 return -EPERM;
 665
 666         if (arg < 0 || arg > 1)
 667                 return -EINVAL;
 668
 669         if (ide_spin_wait_hwgroup(drive))
 670                 return -EBUSY;
 671         drive->unmask = arg;
 672         spin_unlock_irq(&ide_lock);
 673
 674         return 0;
 675 }
 676
 677 /**
 678  *      system_bus_clock        -       clock guess
 679  *
 680  *      External version of the bus clock guess used by very old IDE drivers
 681  *      for things like VLB timings. Should not be used.
 682  */
 683
 684 int system_bus_clock (void)
 685 {
 686         return system_bus_speed;
 687 }
 688
 689 EXPORT_SYMBOL(system_bus_clock);
 690
 691 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
 692 {
 693         ide_drive_t *drive = dev->driver_data;
 694         ide_hwif_t *hwif = HWIF(drive);
 695         struct request rq;
 696         struct request_pm_state rqpm;
 697         ide_task_t args;
 698         int ret;
 699
 700         /* Call ACPI _GTM only once */
 701         if (!(drive->dn % 2))
 702                 ide_acpi_get_timing(hwif);
 703
 704         memset(&rq, 0, sizeof(rq));
 705         memset(&rqpm, 0, sizeof(rqpm));
 706         memset(&args, 0, sizeof(args));
 707         rq.cmd_type = REQ_TYPE_PM_SUSPEND;
 708         rq.special = &args;
 709         rq.data = &rqpm;
 710         rqpm.pm_step = ide_pm_state_start_suspend;
 711         if (mesg.event == PM_EVENT_PRETHAW)
 712                 mesg.event = PM_EVENT_FREEZE;
 713         rqpm.pm_state = mesg.event;
 714
 715         ret = ide_do_drive_cmd(drive, &rq, ide_wait);
 716         /* only call ACPI _PS3 after both drivers are suspended */
 717         if (!ret && (((drive->dn % 2) && hwif->drives[0].present
 718                  && hwif->drives[1].present)
 719                  || !hwif->drives[0].present
 720                  || !hwif->drives[1].present))
 721                 ide_acpi_set_state(hwif, 0);
 722         return ret;
 723 }
 724
 725 static int generic_ide_resume(struct device *dev)
 726 {
 727         ide_drive_t *drive = dev->driver_data;
 728         ide_hwif_t *hwif = HWIF(drive);
 729         struct request rq;
 730         struct request_pm_state rqpm;
 731         ide_task_t args;
 732         int err;
 733
 734         /* Call ACPI _STM only once */
 735         if (!(drive->dn % 2)) {
 736                 ide_acpi_set_state(hwif, 1);
 737                 ide_acpi_push_timing(hwif);
 738         }
 739
 740         ide_acpi_exec_tfs(drive);
 741
 742         memset(&rq, 0, sizeof(rq));
 743         memset(&rqpm, 0, sizeof(rqpm));
 744         memset(&args, 0, sizeof(args));
 745         rq.cmd_type = REQ_TYPE_PM_RESUME;
 746         rq.special = &args;
 747         rq.data = &rqpm;
 748         rqpm.pm_step = ide_pm_state_start_resume;
 749         rqpm.pm_state = PM_EVENT_ON;
 750
 751         err = ide_do_drive_cmd(drive, &rq, ide_head_wait);
 752
 753         if (err == 0 && dev->driver) {
 754                 ide_driver_t *drv = to_ide_driver(dev->driver);
 755
 756                 if (drv->resume)
 757                         drv->resume(drive);
 758         }
 759
 760         return err;
 761 }
 762
 763 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
 764                         unsigned int cmd, unsigned long arg)
 765 {
 766         unsigned long flags;
 767         ide_driver_t *drv;
 768         void __user *p = (void __user *)arg;
 769         int err = 0, (*setfunc)(ide_drive_t *, int);
 770         u8 *val;
 771
 772         switch (cmd) {
 773         case HDIO_GET_32BIT:        val = &drive->io_32bit;      goto read_val;
 774         case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
 775         case HDIO_GET_UNMASKINTR:   val = &drive->unmask;        goto read_val;
 776         case HDIO_GET_DMA:          val = &drive->using_dma;     goto read_val;
 777         case HDIO_SET_32BIT:        setfunc = set_io_32bit;      goto set_val;
 778         case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings;     goto set_val;
 779         case HDIO_SET_PIO_MODE:     setfunc = set_pio_mode;      goto set_val;
 780         case HDIO_SET_UNMASKINTR:   setfunc = set_unmaskirq;     goto set_val;
 781         case HDIO_SET_DMA:          setfunc = set_using_dma;     goto set_val;
 782         }
 783
 784         switch (cmd) {
 785                 case HDIO_OBSOLETE_IDENTITY:
 786                 case HDIO_GET_IDENTITY:
 787                         if (bdev != bdev->bd_contains)
 788                                 return -EINVAL;
 789                         if (drive->id_read == 0)
 790                                 return -ENOMSG;
 791                         if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
 792                                 return -EFAULT;
 793                         return 0;
 794
 795                 case HDIO_GET_NICE:
 796                         return put_user(drive->dsc_overlap      <<      IDE_NICE_DSC_OVERLAP    |
 797                                         drive->atapi_overlap    <<      IDE_NICE_ATAPI_OVERLAP  |
 798                                         drive->nice1 << IDE_NICE_1,
 799                                         (long __user *) arg);
 800 #ifdef CONFIG_IDE_TASK_IOCTL
 801                 case HDIO_DRIVE_TASKFILE:
 802                         if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
 803                                 return -EACCES;
 804                         switch(drive->media) {
 805                                 case ide_disk:
 806                                         return ide_taskfile_ioctl(drive, cmd, arg);
 807                                 default:
 808                                         return -ENOMSG;
 809                         }
 810 #endif /* CONFIG_IDE_TASK_IOCTL */
 811
 812                 case HDIO_DRIVE_CMD:
 813                         if (!capable(CAP_SYS_RAWIO))
 814                                 return -EACCES;
 815                         return ide_cmd_ioctl(drive, cmd, arg);
 816
 817                 case HDIO_DRIVE_TASK:
 818                         if (!capable(CAP_SYS_RAWIO))
 819                                 return -EACCES;
 820                         return ide_task_ioctl(drive, cmd, arg);
 821                 case HDIO_SET_NICE:
 822                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
 823                         if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
 824                                 return -EPERM;
 825                         drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
 826                         drv = *(ide_driver_t **)bdev->bd_disk->private_data;
 827                         if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
 828                                 drive->dsc_overlap = 0;
 829                                 return -EPERM;
 830                         }
 831                         drive->nice1 = (arg >> IDE_NICE_1) & 1;
 832                         return 0;
 833                 case HDIO_DRIVE_RESET:
 834                         if (!capable(CAP_SYS_ADMIN))
 835                                 return -EACCES;
 836
 837                         /*
 838                          *      Abort the current command on the
 839                          *      group if there is one, taking
 840                          *      care not to allow anything else
 841                          *      to be queued and to die on the
 842                          *      spot if we miss one somehow
 843                          */
 844
 845                         spin_lock_irqsave(&ide_lock, flags);
 846
 847                         if (HWGROUP(drive)->resetting) {
 848                                 spin_unlock_irqrestore(&ide_lock, flags);
 849                                 return -EBUSY;
 850                         }
 851
 852                         ide_abort(drive, "drive reset");
 853
 854                         BUG_ON(HWGROUP(drive)->handler);
 855
 856                         /* Ensure nothing gets queued after we
 857                            drop the lock. Reset will clear the busy */
 858
 859                         HWGROUP(drive)->busy = 1;
 860                         spin_unlock_irqrestore(&ide_lock, flags);
 861                         (void) ide_do_reset(drive);
 862
 863                         return 0;
 864                 case HDIO_GET_BUSSTATE:
 865                         if (!capable(CAP_SYS_ADMIN))
 866                                 return -EACCES;
 867                         if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
 868                                 return -EFAULT;
 869                         return 0;
 870
 871                 case HDIO_SET_BUSSTATE:
 872                         if (!capable(CAP_SYS_ADMIN))
 873                                 return -EACCES;
 874                         return -EOPNOTSUPP;
 875                 default:
 876                         return -EINVAL;
 877         }
 878
 879 read_val:
 880         mutex_lock(&ide_setting_mtx);
 881         spin_lock_irqsave(&ide_lock, flags);
 882         err = *val;
 883         spin_unlock_irqrestore(&ide_lock, flags);
 884         mutex_unlock(&ide_setting_mtx);
 885         return err >= 0 ? put_user(err, (long __user *)arg) : err;
 886
 887 set_val:
 888         if (bdev != bdev->bd_contains)
 889                 err = -EINVAL;
 890         else {
 891                 if (!capable(CAP_SYS_ADMIN))
 892                         err = -EACCES;
 893                 else {
 894                         mutex_lock(&ide_setting_mtx);
 895                         err = setfunc(drive, arg);
 896                         mutex_unlock(&ide_setting_mtx);
 897                 }
 898         }
 899         return err;
 900 }
 901
 902 EXPORT_SYMBOL(generic_ide_ioctl);
 903
 904 /*
 905  * stridx() returns the offset of c within s,
 906  * or -1 if c is '\0' or not found within s.
 907  */
 908 static int __init stridx (const char *s, char c)
 909 {
 910         char *i = strchr(s, c);
 911         return (i && c) ? i - s : -1;
 912 }
 913
 914 /*
 915  * match_parm() does parsing for ide_setup():
 916  *
 917  * 1. the first char of s must be '='.
 918  * 2. if the remainder matches one of the supplied keywords,
 919  *     the index (1 based) of the keyword is negated and returned.
 920  * 3. if the remainder is a series of no more than max_vals numbers
 921  *     separated by commas, the numbers are saved in vals[] and a
 922  *     count of how many were saved is returned.  Base10 is assumed,
 923  *     and base16 is allowed when prefixed with "0x".
 924  * 4. otherwise, zero is returned.
 925  */
 926 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
 927 {
 928         static const char *decimal = "0123456789";
 929         static const char *hex = "0123456789abcdef";
 930         int i, n;
 931
 932         if (*s++ == '=') {
 933                 /*
 934                  * Try matching against the supplied keywords,
 935                  * and return -(index+1) if we match one
 936                  */
 937                 if (keywords != NULL) {
 938                         for (i = 0; *keywords != NULL; ++i) {
 939                                 if (!strcmp(s, *keywords++))
 940                                         return -(i+1);
 941                         }
 942                 }
 943                 /*
 944                  * Look for a series of no more than "max_vals"
 945                  * numeric values separated by commas, in base10,
 946                  * or base16 when prefixed with "0x".
 947                  * Return a count of how many were found.
 948                  */
 949                 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
 950                         vals[n] = i;
 951                         while ((i = stridx(decimal, *++s)) >= 0)
 952                                 vals[n] = (vals[n] * 10) + i;
 953                         if (*s == 'x' && !vals[n]) {
 954                                 while ((i = stridx(hex, *++s)) >= 0)
 955                                         vals[n] = (vals[n] * 0x10) + i;
 956                         }
 957                         if (++n == max_vals)
 958                                 break;
 959                         if (*s == ',' || *s == ';')
 960                                 ++s;
 961                 }
 962                 if (!*s)
 963                         return n;
 964         }
 965         return 0;       /* zero = nothing matched */
 966 }
 967
 968 extern int probe_ali14xx;
 969 extern int probe_umc8672;
 970 extern int probe_dtc2278;
 971 extern int probe_ht6560b;
 972 extern int probe_qd65xx;
 973 extern int cmd640_vlb;
 974
 975 static int __initdata is_chipset_set;
 976
 977 /*
 978  * ide_setup() gets called VERY EARLY during initialization,
 979  * to handle kernel "command line" strings beginning with "hdx=" or "ide".
 980  *
 981  * Remember to update Documentation/ide/ide.txt if you change something here.
 982  */
 983 static int __init ide_setup(char *s)
 984 {
 985         int i, vals[3];
 986         ide_hwif_t *hwif;
 987         ide_drive_t *drive;
 988         unsigned int hw, unit;
 989         const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
 990         const char max_hwif  = '0' + (MAX_HWIFS - 1);
 991
 992
 993         if (strncmp(s,"hd",2) == 0 && s[2] == '=')      /* hd= is for hd.c   */
 994                 return 0;                               /* driver and not us */
 995
 996         if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
 997                 return 0;
 998
 999         printk(KERN_INFO "ide_setup: %s", s);
1000         init_ide_data ();
1001
1002 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1003         if (!strcmp(s, "ide=doubler")) {
1004                 extern int ide_doubler;
1005
1006                 printk(" : Enabled support for IDE doublers\n");
1007                 ide_doubler = 1;
1008                 return 1;
1009         }
1010 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1011
1012         if (!strcmp(s, "ide=nodma")) {
1013                 printk(" : Prevented DMA\n");
1014                 noautodma = 1;
1015                 goto obsolete_option;
1016         }
1017
1018 #ifdef CONFIG_BLK_DEV_IDEACPI
1019         if (!strcmp(s, "ide=noacpi")) {
1020                 //printk(" : Disable IDE ACPI support.\n");
1021                 ide_noacpi = 1;
1022                 return 1;
1023         }
1024         if (!strcmp(s, "ide=acpigtf")) {
1025                 //printk(" : Enable IDE ACPI _GTF support.\n");
1026                 ide_noacpitfs = 0;
1027                 return 1;
1028         }
1029         if (!strcmp(s, "ide=acpionboot")) {
1030                 //printk(" : Call IDE ACPI methods on boot.\n");
1031                 ide_noacpionboot = 0;
1032                 return 1;
1033         }
1034 #endif /* CONFIG_BLK_DEV_IDEACPI */
1035
1036         /*
1037          * Look for drive options:  "hdx="
1038          */
1039         if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1040                 const char *hd_words[] = {
1041                         "none", "noprobe", "nowerr", "cdrom", "nodma",
1042                         "autotune", "noautotune", "-8", "-9", "-10",
1043                         "noflush", "remap", "remap63", "scsi", NULL };
1044                 unit = s[2] - 'a';
1045                 hw   = unit / MAX_DRIVES;
1046                 unit = unit % MAX_DRIVES;
1047                 hwif = &ide_hwifs[hw];
1048                 drive = &hwif->drives[unit];
1049                 if (strncmp(s + 4, "ide-", 4) == 0) {
1050                         strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1051                         goto obsolete_option;
1052                 }
1053                 switch (match_parm(&s[3], hd_words, vals, 3)) {
1054                         case -1: /* "none" */
1055                         case -2: /* "noprobe" */
1056                                 drive->noprobe = 1;
1057                                 goto done;
1058                         case -3: /* "nowerr" */
1059                                 drive->bad_wstat = BAD_R_STAT;
1060                                 hwif->noprobe = 0;
1061                                 goto done;
1062                         case -4: /* "cdrom" */
1063                                 drive->present = 1;
1064                                 drive->media = ide_cdrom;
1065                                 /* an ATAPI device ignores DRDY */
1066                                 drive->ready_stat = 0;
1067                                 hwif->noprobe = 0;
1068                                 goto done;
1069                         case -5: /* nodma */
1070                                 drive->nodma = 1;
1071                                 goto done;
1072                         case -6: /* "autotune" */
1073                                 drive->autotune = IDE_TUNE_AUTO;
1074                                 goto obsolete_option;
1075                         case -7: /* "noautotune" */
1076                                 drive->autotune = IDE_TUNE_NOAUTO;
1077                                 goto obsolete_option;
1078                         case -11: /* noflush */
1079                                 drive->noflush = 1;
1080                                 goto done;
1081                         case -12: /* "remap" */
1082                                 drive->remap_0_to_1 = 1;
1083                                 goto obsolete_option;
1084                         case -13: /* "remap63" */
1085                                 drive->sect0 = 63;
1086                                 goto obsolete_option;
1087                         case -14: /* "scsi" */
1088                                 drive->scsi = 1;
1089                                 goto obsolete_option;
1090                         case 3: /* cyl,head,sect */
1091                                 drive->media    = ide_disk;
1092                                 drive->ready_stat = READY_STAT;
1093                                 drive->cyl      = drive->bios_cyl  = vals[0];
1094                                 drive->head     = drive->bios_head = vals[1];
1095                                 drive->sect     = drive->bios_sect = vals[2];
1096                                 drive->present  = 1;
1097                                 drive->forced_geom = 1;
1098                                 hwif->noprobe = 0;
1099                                 goto done;
1100                         default:
1101                                 goto bad_option;
1102                 }
1103         }
1104
1105         if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1106                 goto bad_option;
1107         /*
1108          * Look for bus speed option:  "idebus="
1109          */
1110         if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1111                 if (match_parm(&s[6], NULL, vals, 1) != 1)
1112                         goto bad_option;
1113                 if (vals[0] >= 20 && vals[0] <= 66) {
1114                         idebus_parameter = vals[0];
1115                 } else
1116                         printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1117                 goto done;
1118         }
1119         /*
1120          * Look for interface options:  "idex="
1121          */
1122         if (s[3] >= '0' && s[3] <= max_hwif) {
1123                 /*
1124                  * Be VERY CAREFUL changing this: note hardcoded indexes below
1125                  * (-8, -9, -10) are reserved to ease the hardcoding.
1126                  */
1127                 static const char *ide_words[] = {
1128                         "noprobe", "serialize", "minus3", "minus4",
1129                         "reset", "minus6", "ata66", "minus8", "minus9",
1130                         "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1131                         "dtc2278", "umc8672", "ali14xx", NULL };
1132
1133                 hw = s[3] - '0';
1134                 hwif = &ide_hwifs[hw];
1135                 i = match_parm(&s[4], ide_words, vals, 3);
1136
1137                 /*
1138                  * Cryptic check to ensure chipset not already set for hwif.
1139                  * Note: we can't depend on hwif->chipset here.
1140                  */
1141                 if (i >= -18 && i <= -11) {
1142                         /* chipset already specified */
1143                         if (is_chipset_set)
1144                                 goto bad_option;
1145                         /* these drivers are for "ide0=" only */
1146                         if (hw != 0)
1147                                 goto bad_hwif;
1148                         is_chipset_set = 1;
1149                         printk("\n");
1150                 }
1151
1152                 switch (i) {
1153 #ifdef CONFIG_BLK_DEV_ALI14XX
1154                         case -17: /* "ali14xx" */
1155                                 probe_ali14xx = 1;
1156                                 goto obsolete_option;
1157 #endif
1158 #ifdef CONFIG_BLK_DEV_UMC8672
1159                         case -16: /* "umc8672" */
1160                                 probe_umc8672 = 1;
1161                                 goto obsolete_option;
1162 #endif
1163 #ifdef CONFIG_BLK_DEV_DTC2278
1164                         case -15: /* "dtc2278" */
1165                                 probe_dtc2278 = 1;
1166                                 goto obsolete_option;
1167 #endif
1168 #ifdef CONFIG_BLK_DEV_CMD640
1169                         case -14: /* "cmd640_vlb" */
1170                                 cmd640_vlb = 1;
1171                                 goto obsolete_option;
1172 #endif
1173 #ifdef CONFIG_BLK_DEV_HT6560B
1174                         case -13: /* "ht6560b" */
1175                                 probe_ht6560b = 1;
1176                                 goto obsolete_option;
1177 #endif
1178 #ifdef CONFIG_BLK_DEV_QD65XX
1179                         case -12: /* "qd65xx" */
1180                                 probe_qd65xx = 1;
1181                                 goto obsolete_option;
1182 #endif
1183 #ifdef CONFIG_BLK_DEV_4DRIVES
1184                         case -11: /* "four" drives on one set of ports */
1185                         {
1186                                 ide_hwif_t *mate = &ide_hwifs[hw^1];
1187                                 mate->drives[0].select.all ^= 0x20;
1188                                 mate->drives[1].select.all ^= 0x20;
1189                                 hwif->chipset = mate->chipset = ide_4drives;
1190                                 mate->irq = hwif->irq;
1191                                 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1192                                 hwif->mate = mate;
1193                                 mate->mate = hwif;
1194                                 hwif->serialized = mate->serialized = 1;
1195                                 goto obsolete_option;
1196                         }
1197 #endif /* CONFIG_BLK_DEV_4DRIVES */
1198                         case -10: /* minus10 */
1199                         case -9: /* minus9 */
1200                         case -8: /* minus8 */
1201                         case -6:
1202                         case -4:
1203                         case -3:
1204                                 goto bad_option;
1205                         case -7: /* ata66 */
1206 #ifdef CONFIG_BLK_DEV_IDEPCI
1207                                 /*
1208                                  * Use ATA_CBL_PATA40_SHORT so drive side
1209                                  * cable detection is also overriden.
1210                                  */
1211                                 hwif->cbl = ATA_CBL_PATA40_SHORT;
1212                                 goto obsolete_option;
1213 #else
1214                                 goto bad_hwif;
1215 #endif
1216                         case -5: /* "reset" */
1217                                 hwif->reset = 1;
1218                                 goto obsolete_option;
1219                         case -2: /* "serialize" */
1220                                 hwif->mate = &ide_hwifs[hw^1];
1221                                 hwif->mate->mate = hwif;
1222                                 hwif->serialized = hwif->mate->serialized = 1;
1223                                 goto obsolete_option;
1224
1225                         case -1: /* "noprobe" */
1226                                 hwif->noprobe = 1;
1227                                 goto obsolete_option;
1228                         case 0:
1229                         case 1:
1230                         case 2:
1231                         case 3:
1232                                 goto bad_option;
1233                         default:
1234                                 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1235                                 return 1;
1236                 }
1237         }
1238 bad_option:
1239         printk(" -- BAD OPTION\n");
1240         return 1;
1241 obsolete_option:
1242         printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1243         return 1;
1244 bad_hwif:
1245         printk("-- NOT SUPPORTED ON ide%d", hw);
1246 done:
1247         printk("\n");
1248         return 1;
1249 }
1250
1251 EXPORT_SYMBOL(ide_lock);
1252
1253 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1254 {
1255         return 1;
1256 }
1257
1258 static char *media_string(ide_drive_t *drive)
1259 {
1260         switch (drive->media) {
1261         case ide_disk:
1262                 return "disk";
1263         case ide_cdrom:
1264                 return "cdrom";
1265         case ide_tape:
1266                 return "tape";
1267         case ide_floppy:
1268                 return "floppy";
1269         case ide_optical:
1270                 return "optical";
1271         default:
1272                 return "UNKNOWN";
1273         }
1274 }
1275
1276 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1277 {
1278         ide_drive_t *drive = to_ide_device(dev);
1279         return sprintf(buf, "%s\n", media_string(drive));
1280 }
1281
1282 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1283 {
1284         ide_drive_t *drive = to_ide_device(dev);
1285         return sprintf(buf, "%s\n", drive->name);
1286 }
1287
1288 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1289 {
1290         ide_drive_t *drive = to_ide_device(dev);
1291         return sprintf(buf, "ide:m-%s\n", media_string(drive));
1292 }
1293
1294 static ssize_t model_show(struct device *dev, struct device_attribute *attr,
1295                           char *buf)
1296 {
1297         ide_drive_t *drive = to_ide_device(dev);
1298         return sprintf(buf, "%s\n", drive->id->model);
1299 }
1300
1301 static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
1302                              char *buf)
1303 {
1304         ide_drive_t *drive = to_ide_device(dev);
1305         return sprintf(buf, "%s\n", drive->id->fw_rev);
1306 }
1307
1308 static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
1309                            char *buf)
1310 {
1311         ide_drive_t *drive = to_ide_device(dev);
1312         return sprintf(buf, "%s\n", drive->id->serial_no);
1313 }
1314
1315 static struct device_attribute ide_dev_attrs[] = {
1316         __ATTR_RO(media),
1317         __ATTR_RO(drivename),
1318         __ATTR_RO(modalias),
1319         __ATTR_RO(model),
1320         __ATTR_RO(firmware),
1321         __ATTR(serial, 0400, serial_show, NULL),
1322         __ATTR_NULL
1323 };
1324
1325 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
1326 {
1327         ide_drive_t *drive = to_ide_device(dev);
1328
1329         add_uevent_var(env, "MEDIA=%s", media_string(drive));
1330         add_uevent_var(env, "DRIVENAME=%s", drive->name);
1331         add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
1332         return 0;
1333 }
1334
1335 static int generic_ide_probe(struct device *dev)
1336 {
1337         ide_drive_t *drive = to_ide_device(dev);
1338         ide_driver_t *drv = to_ide_driver(dev->driver);
1339
1340         return drv->probe ? drv->probe(drive) : -ENODEV;
1341 }
1342
1343 static int generic_ide_remove(struct device *dev)
1344 {
1345         ide_drive_t *drive = to_ide_device(dev);
1346         ide_driver_t *drv = to_ide_driver(dev->driver);
1347
1348         if (drv->remove)
1349                 drv->remove(drive);
1350
1351         return 0;
1352 }
1353
1354 static void generic_ide_shutdown(struct device *dev)
1355 {
1356         ide_drive_t *drive = to_ide_device(dev);
1357         ide_driver_t *drv = to_ide_driver(dev->driver);
1358
1359         if (dev->driver && drv->shutdown)
1360                 drv->shutdown(drive);
1361 }
1362
1363 struct bus_type ide_bus_type = {
1364         .name           = "ide",
1365         .match          = ide_bus_match,
1366         .uevent         = ide_uevent,
1367         .probe          = generic_ide_probe,
1368         .remove         = generic_ide_remove,
1369         .shutdown       = generic_ide_shutdown,
1370         .dev_attrs      = ide_dev_attrs,
1371         .suspend        = generic_ide_suspend,
1372         .resume         = generic_ide_resume,
1373 };
1374
1375 EXPORT_SYMBOL_GPL(ide_bus_type);
1376
1377 static void ide_port_class_release(struct device *portdev)
1378 {
1379         ide_hwif_t *hwif = dev_get_drvdata(portdev);
1380
1381         put_device(&hwif->gendev);
1382 }
1383
1384 /*
1385  * This is gets invoked once during initialization, to set *everything* up
1386  */
1387 static int __init ide_init(void)
1388 {
1389         int ret;
1390
1391         printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n");
1392         system_bus_speed = ide_system_bus_speed();
1393
1394         printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
1395                          "for PIO modes%s\n", system_bus_speed,
1396                         idebus_parameter ? "" : "; override with idebus=xx");
1397
1398         ret = bus_register(&ide_bus_type);
1399         if (ret < 0) {
1400                 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1401                 return ret;
1402         }
1403
1404         ide_port_class = class_create(THIS_MODULE, "ide_port");
1405         if (IS_ERR(ide_port_class)) {
1406                 ret = PTR_ERR(ide_port_class);
1407                 goto out_port_class;
1408         }
1409         ide_port_class->dev_release = ide_port_class_release;
1410
1411         init_ide_data();
1412
1413         proc_ide_create();
1414
1415         return 0;
1416
1417 out_port_class:
1418         bus_unregister(&ide_bus_type);
1419
1420         return ret;
1421 }
1422
1423 #ifdef MODULE
1424 static char *options = NULL;
1425 module_param(options, charp, 0);
1426 MODULE_LICENSE("GPL");
1427
1428 static void __init parse_options (char *line)
1429 {
1430         char *next = line;
1431
1432         if (line == NULL || !*line)
1433                 return;
1434         while ((line = next) != NULL) {
1435                 if ((next = strchr(line,' ')) != NULL)
1436                         *next++ = 0;
1437                 if (!ide_setup(line))
1438                         printk (KERN_INFO "Unknown option '%s'\n", line);
1439         }
1440 }
1441
1442 int __init init_module (void)
1443 {
1444         parse_options(options);
1445         return ide_init();
1446 }
1447
1448 void __exit cleanup_module (void)
1449 {
1450         int index;
1451
1452         for (index = 0; index < MAX_HWIFS; ++index)
1453                 ide_unregister(index);
1454
1455         proc_ide_destroy();
1456
1457         class_destroy(ide_port_class);
1458
1459         bus_unregister(&ide_bus_type);
1460 }
1461
1462 #else /* !MODULE */
1463
1464 __setup("", ide_setup);
1465
1466 module_init(ide_init);
1467
1468 #endif /* MODULE */