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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 #ifndef CONFIG_IDE_ARCH_OBSOLETE_DEFAULTS
 169 # define ide_default_io_base(index)     (0)
 170 # define ide_init_default_irq(base)     (0)
 171 #endif
 172
 173 /*
 174  * init_ide_data() sets reasonable default values into all fields
 175  * of all instances of the hwifs and drives, but only on the first call.
 176  * Subsequent calls have no effect (they don't wipe out anything).
 177  *
 178  * This routine is normally called at driver initialization time,
 179  * but may also be called MUCH earlier during kernel "command-line"
 180  * parameter processing.  As such, we cannot depend on any other parts
 181  * of the kernel (such as memory allocation) to be functioning yet.
 182  *
 183  * This is too bad, as otherwise we could dynamically allocate the
 184  * ide_drive_t structs as needed, rather than always consuming memory
 185  * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
 186  *
 187  * FIXME: We should stuff the setup data into __init and copy the
 188  * relevant hwifs/allocate them properly during boot.
 189  */
 190 #define MAGIC_COOKIE 0x12345678
 191 static void __init init_ide_data (void)
 192 {
 193         unsigned int index;
 194         static unsigned long magic_cookie = MAGIC_COOKIE;
 195         hw_regs_t hw;
 196
 197         if (magic_cookie != MAGIC_COOKIE)
 198                 return;         /* already initialized */
 199         magic_cookie = 0;
 200
 201         /* Initialise all interface structures */
 202         for (index = 0; index < MAX_HWIFS; ++index) {
 203                 ide_hwif_t *hwif = &ide_hwifs[index];
 204                 unsigned long io_addr = ide_default_io_base(index);
 205                 unsigned long ctl_addr = io_addr + 0x206;
 206
 207                 ide_init_port_data(hwif, index);
 208
 209 #ifdef CONFIG_IDE_ARCH_OBSOLETE_DEFAULTS
 210                 memset(&hw, 0, sizeof(hw));
 211                 ide_std_init_ports(&hw, io_addr, ctl_addr);
 212                 memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
 213                 hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
 214                 hwif->irq =
 215                         ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
 216 #endif
 217         }
 218 }
 219
 220 /**
 221  *      ide_system_bus_speed    -       guess bus speed
 222  *
 223  *      ide_system_bus_speed() returns what we think is the system VESA/PCI
 224  *      bus speed (in MHz). This is used for calculating interface PIO timings.
 225  *      The default is 40 for known PCI systems, 50 otherwise.
 226  *      The "idebus=xx" parameter can be used to override this value.
 227  *      The actual value to be used is computed/displayed the first time
 228  *      through. Drivers should only use this as a last resort.
 229  *
 230  *      Returns a guessed speed in MHz.
 231  */
 232
 233 static int ide_system_bus_speed(void)
 234 {
 235 #ifdef CONFIG_PCI
 236         static struct pci_device_id pci_default[] = {
 237                 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
 238                 { }
 239         };
 240 #else
 241 #define pci_default 0
 242 #endif /* CONFIG_PCI */
 243
 244         /* user supplied value */
 245         if (idebus_parameter)
 246                 return idebus_parameter;
 247
 248         /* safe default value for PCI or VESA and PCI*/
 249         return pci_dev_present(pci_default) ? 33 : 50;
 250 }
 251
 252 ide_hwif_t * ide_find_port(unsigned long base)
 253 {
 254         ide_hwif_t *hwif;
 255         int i;
 256
 257         for (i = 0; i < MAX_HWIFS; i++) {
 258                 hwif = &ide_hwifs[i];
 259                 if (hwif->io_ports[IDE_DATA_OFFSET] == base)
 260                         goto found;
 261         }
 262
 263         for (i = 0; i < MAX_HWIFS; i++) {
 264                 hwif = &ide_hwifs[i];
 265                 if (hwif->chipset == ide_unknown)
 266                         goto found;
 267         }
 268
 269         hwif = NULL;
 270 found:
 271         return hwif;
 272 }
 273
 274 EXPORT_SYMBOL_GPL(ide_find_port);
 275
 276 static struct resource* hwif_request_region(ide_hwif_t *hwif,
 277                                             unsigned long addr, int num)
 278 {
 279         struct resource *res = request_region(addr, num, hwif->name);
 280
 281         if (!res)
 282                 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
 283                                 hwif->name, addr, addr+num-1);
 284         return res;
 285 }
 286
 287 /**
 288  *      ide_hwif_request_regions - request resources for IDE
 289  *      @hwif: interface to use
 290  *
 291  *      Requests all the needed resources for an interface.
 292  *      Right now core IDE code does this work which is deeply wrong.
 293  *      MMIO leaves it to the controller driver,
 294  *      PIO will migrate this way over time.
 295  */
 296
 297 int ide_hwif_request_regions(ide_hwif_t *hwif)
 298 {
 299         unsigned long addr;
 300         unsigned int i;
 301
 302         if (hwif->mmio)
 303                 return 0;
 304         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
 305         if (addr && !hwif_request_region(hwif, addr, 1))
 306                 goto control_region_busy;
 307         hwif->straight8 = 0;
 308         addr = hwif->io_ports[IDE_DATA_OFFSET];
 309         if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
 310                 if (!hwif_request_region(hwif, addr, 8))
 311                         goto data_region_busy;
 312                 hwif->straight8 = 1;
 313                 return 0;
 314         }
 315         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
 316                 addr = hwif->io_ports[i];
 317                 if (!hwif_request_region(hwif, addr, 1)) {
 318                         while (--i)
 319                                 release_region(addr, 1);
 320                         goto data_region_busy;
 321                 }
 322         }
 323         return 0;
 324
 325 data_region_busy:
 326         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
 327         if (addr)
 328                 release_region(addr, 1);
 329 control_region_busy:
 330         /* If any errors are return, we drop the hwif interface. */
 331         return -EBUSY;
 332 }
 333
 334 /**
 335  *      ide_hwif_release_regions - free IDE resources
 336  *
 337  *      Note that we only release the standard ports,
 338  *      and do not even try to handle any extra ports
 339  *      allocated for weird IDE interface chipsets.
 340  *
 341  *      Note also that we don't yet handle mmio resources here. More
 342  *      importantly our caller should be doing this so we need to
 343  *      restructure this as a helper function for drivers.
 344  */
 345
 346 void ide_hwif_release_regions(ide_hwif_t *hwif)
 347 {
 348         u32 i = 0;
 349
 350         if (hwif->mmio)
 351                 return;
 352         if (hwif->io_ports[IDE_CONTROL_OFFSET])
 353                 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
 354         if (hwif->straight8) {
 355                 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
 356                 return;
 357         }
 358         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
 359                 if (hwif->io_ports[i])
 360                         release_region(hwif->io_ports[i], 1);
 361 }
 362
 363 void ide_remove_port_from_hwgroup(ide_hwif_t *hwif)
 364 {
 365         ide_hwgroup_t *hwgroup = hwif->hwgroup;
 366
 367         spin_lock_irq(&ide_lock);
 368         /*
 369          * Remove us from the hwgroup, and free
 370          * the hwgroup if we were the only member
 371          */
 372         if (hwif->next == hwif) {
 373                 BUG_ON(hwgroup->hwif != hwif);
 374                 kfree(hwgroup);
 375         } else {
 376                 /* There is another interface in hwgroup.
 377                  * Unlink us, and set hwgroup->drive and ->hwif to
 378                  * something sane.
 379                  */
 380                 ide_hwif_t *g = hwgroup->hwif;
 381
 382                 while (g->next != hwif)
 383                         g = g->next;
 384                 g->next = hwif->next;
 385                 if (hwgroup->hwif == hwif) {
 386                         /* Chose a random hwif for hwgroup->hwif.
 387                          * It's guaranteed that there are no drives
 388                          * left in the hwgroup.
 389                          */
 390                         BUG_ON(hwgroup->drive != NULL);
 391                         hwgroup->hwif = g;
 392                 }
 393                 BUG_ON(hwgroup->hwif == hwif);
 394         }
 395         spin_unlock_irq(&ide_lock);
 396 }
 397
 398 /* Called with ide_lock held. */
 399 static void __ide_port_unregister_devices(ide_hwif_t *hwif)
 400 {
 401         int i;
 402
 403         for (i = 0; i < MAX_DRIVES; i++) {
 404                 ide_drive_t *drive = &hwif->drives[i];
 405
 406                 if (drive->present) {
 407                         spin_unlock_irq(&ide_lock);
 408                         device_unregister(&drive->gendev);
 409                         wait_for_completion(&drive->gendev_rel_comp);
 410                         spin_lock_irq(&ide_lock);
 411                 }
 412         }
 413 }
 414
 415 void ide_port_unregister_devices(ide_hwif_t *hwif)
 416 {
 417         mutex_lock(&ide_cfg_mtx);
 418         spin_lock_irq(&ide_lock);
 419         __ide_port_unregister_devices(hwif);
 420         hwif->present = 0;
 421         ide_port_init_devices_data(hwif);
 422         spin_unlock_irq(&ide_lock);
 423         mutex_unlock(&ide_cfg_mtx);
 424 }
 425 EXPORT_SYMBOL_GPL(ide_port_unregister_devices);
 426
 427 /**
 428  *      ide_unregister          -       free an IDE interface
 429  *      @index: index of interface (will change soon to a pointer)
 430  *
 431  *      Perform the final unregister of an IDE interface. At the moment
 432  *      we don't refcount interfaces so this will also get split up.
 433  *
 434  *      Locking:
 435  *      The caller must not hold the IDE locks
 436  *      The drive present/vanishing is not yet properly locked
 437  *      Take care with the callbacks. These have been split to avoid
 438  *      deadlocking the IDE layer. The shutdown callback is called
 439  *      before we take the lock and free resources. It is up to the
 440  *      caller to be sure there is no pending I/O here, and that
 441  *      the interface will not be reopened (present/vanishing locking
 442  *      isn't yet done BTW). After we commit to the final kill we
 443  *      call the cleanup callback with the ide locks held.
 444  *
 445  *      Unregister restores the hwif structures to the default state.
 446  *      This is raving bonkers.
 447  */
 448
 449 void ide_unregister(unsigned int index)
 450 {
 451         ide_hwif_t *hwif, *g;
 452         ide_hwgroup_t *hwgroup;
 453         int irq_count = 0;
 454
 455         BUG_ON(index >= MAX_HWIFS);
 456
 457         BUG_ON(in_interrupt());
 458         BUG_ON(irqs_disabled());
 459         mutex_lock(&ide_cfg_mtx);
 460         spin_lock_irq(&ide_lock);
 461         hwif = &ide_hwifs[index];
 462         if (!hwif->present)
 463                 goto abort;
 464         __ide_port_unregister_devices(hwif);
 465         hwif->present = 0;
 466
 467         spin_unlock_irq(&ide_lock);
 468
 469         ide_proc_unregister_port(hwif);
 470
 471         hwgroup = hwif->hwgroup;
 472         /*
 473          * free the irq if we were the only hwif using it
 474          */
 475         g = hwgroup->hwif;
 476         do {
 477                 if (g->irq == hwif->irq)
 478                         ++irq_count;
 479                 g = g->next;
 480         } while (g != hwgroup->hwif);
 481         if (irq_count == 1)
 482                 free_irq(hwif->irq, hwgroup);
 483
 484         ide_remove_port_from_hwgroup(hwif);
 485
 486         device_unregister(hwif->portdev);
 487         device_unregister(&hwif->gendev);
 488         wait_for_completion(&hwif->gendev_rel_comp);
 489
 490         /*
 491          * Remove us from the kernel's knowledge
 492          */
 493         blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
 494         kfree(hwif->sg_table);
 495         unregister_blkdev(hwif->major, hwif->name);
 496         spin_lock_irq(&ide_lock);
 497
 498         if (hwif->dma_base)
 499                 (void)ide_release_dma(hwif);
 500
 501         ide_hwif_release_regions(hwif);
 502
 503         /* restore hwif data to pristine status */
 504         ide_init_port_data(hwif, index);
 505
 506 abort:
 507         spin_unlock_irq(&ide_lock);
 508         mutex_unlock(&ide_cfg_mtx);
 509 }
 510
 511 EXPORT_SYMBOL(ide_unregister);
 512
 513 void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw)
 514 {
 515         memcpy(hwif->io_ports, hw->io_ports, sizeof(hwif->io_ports));
 516         hwif->irq = hw->irq;
 517         hwif->noprobe = 0;
 518         hwif->chipset = hw->chipset;
 519         hwif->gendev.parent = hw->dev;
 520         hwif->ack_intr = hw->ack_intr;
 521 }
 522 EXPORT_SYMBOL_GPL(ide_init_port_hw);
 523
 524 /*
 525  *      Locks for IDE setting functionality
 526  */
 527
 528 DEFINE_MUTEX(ide_setting_mtx);
 529
 530 EXPORT_SYMBOL_GPL(ide_setting_mtx);
 531
 532 /**
 533  *      ide_spin_wait_hwgroup   -       wait for group
 534  *      @drive: drive in the group
 535  *
 536  *      Wait for an IDE device group to go non busy and then return
 537  *      holding the ide_lock which guards the hwgroup->busy status
 538  *      and right to use it.
 539  */
 540
 541 int ide_spin_wait_hwgroup (ide_drive_t *drive)
 542 {
 543         ide_hwgroup_t *hwgroup = HWGROUP(drive);
 544         unsigned long timeout = jiffies + (3 * HZ);
 545
 546         spin_lock_irq(&ide_lock);
 547
 548         while (hwgroup->busy) {
 549                 unsigned long lflags;
 550                 spin_unlock_irq(&ide_lock);
 551                 local_irq_set(lflags);
 552                 if (time_after(jiffies, timeout)) {
 553                         local_irq_restore(lflags);
 554                         printk(KERN_ERR "%s: channel busy\n", drive->name);
 555                         return -EBUSY;
 556                 }
 557                 local_irq_restore(lflags);
 558                 spin_lock_irq(&ide_lock);
 559         }
 560         return 0;
 561 }
 562
 563 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
 564
 565 int set_io_32bit(ide_drive_t *drive, int arg)
 566 {
 567         if (drive->no_io_32bit)
 568                 return -EPERM;
 569
 570         if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
 571                 return -EINVAL;
 572
 573         if (ide_spin_wait_hwgroup(drive))
 574                 return -EBUSY;
 575
 576         drive->io_32bit = arg;
 577
 578         spin_unlock_irq(&ide_lock);
 579
 580         return 0;
 581 }
 582
 583 static int set_ksettings(ide_drive_t *drive, int arg)
 584 {
 585         if (arg < 0 || arg > 1)
 586                 return -EINVAL;
 587
 588         if (ide_spin_wait_hwgroup(drive))
 589                 return -EBUSY;
 590         drive->keep_settings = arg;
 591         spin_unlock_irq(&ide_lock);
 592
 593         return 0;
 594 }
 595
 596 int set_using_dma(ide_drive_t *drive, int arg)
 597 {
 598 #ifdef CONFIG_BLK_DEV_IDEDMA
 599         ide_hwif_t *hwif = drive->hwif;
 600         int err = -EPERM;
 601
 602         if (arg < 0 || arg > 1)
 603                 return -EINVAL;
 604
 605         if (!drive->id || !(drive->id->capability & 1))
 606                 goto out;
 607
 608         if (hwif->dma_host_set == NULL)
 609                 goto out;
 610
 611         err = -EBUSY;
 612         if (ide_spin_wait_hwgroup(drive))
 613                 goto out;
 614         /*
 615          * set ->busy flag, unlock and let it ride
 616          */
 617         hwif->hwgroup->busy = 1;
 618         spin_unlock_irq(&ide_lock);
 619
 620         err = 0;
 621
 622         if (arg) {
 623                 if (ide_set_dma(drive))
 624                         err = -EIO;
 625         } else
 626                 ide_dma_off(drive);
 627
 628         /*
 629          * lock, clear ->busy flag and unlock before leaving
 630          */
 631         spin_lock_irq(&ide_lock);
 632         hwif->hwgroup->busy = 0;
 633         spin_unlock_irq(&ide_lock);
 634 out:
 635         return err;
 636 #else
 637         if (arg < 0 || arg > 1)
 638                 return -EINVAL;
 639
 640         return -EPERM;
 641 #endif
 642 }
 643
 644 int set_pio_mode(ide_drive_t *drive, int arg)
 645 {
 646         struct request rq;
 647
 648         if (arg < 0 || arg > 255)
 649                 return -EINVAL;
 650
 651         if (drive->hwif->set_pio_mode == NULL)
 652                 return -ENOSYS;
 653
 654         if (drive->special.b.set_tune)
 655                 return -EBUSY;
 656
 657         ide_init_drive_cmd(&rq);
 658         rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
 659
 660         drive->tune_req = (u8) arg;
 661         drive->special.b.set_tune = 1;
 662         (void) ide_do_drive_cmd(drive, &rq, ide_wait);
 663         return 0;
 664 }
 665
 666 static int set_unmaskirq(ide_drive_t *drive, int arg)
 667 {
 668         if (drive->no_unmask)
 669                 return -EPERM;
 670
 671         if (arg < 0 || arg > 1)
 672                 return -EINVAL;
 673
 674         if (ide_spin_wait_hwgroup(drive))
 675                 return -EBUSY;
 676         drive->unmask = arg;
 677         spin_unlock_irq(&ide_lock);
 678
 679         return 0;
 680 }
 681
 682 /**
 683  *      system_bus_clock        -       clock guess
 684  *
 685  *      External version of the bus clock guess used by very old IDE drivers
 686  *      for things like VLB timings. Should not be used.
 687  */
 688
 689 int system_bus_clock (void)
 690 {
 691         return system_bus_speed;
 692 }
 693
 694 EXPORT_SYMBOL(system_bus_clock);
 695
 696 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
 697 {
 698         ide_drive_t *drive = dev->driver_data;
 699         ide_hwif_t *hwif = HWIF(drive);
 700         struct request rq;
 701         struct request_pm_state rqpm;
 702         ide_task_t args;
 703         int ret;
 704
 705         /* Call ACPI _GTM only once */
 706         if (!(drive->dn % 2))
 707                 ide_acpi_get_timing(hwif);
 708
 709         memset(&rq, 0, sizeof(rq));
 710         memset(&rqpm, 0, sizeof(rqpm));
 711         memset(&args, 0, sizeof(args));
 712         rq.cmd_type = REQ_TYPE_PM_SUSPEND;
 713         rq.special = &args;
 714         rq.data = &rqpm;
 715         rqpm.pm_step = ide_pm_state_start_suspend;
 716         if (mesg.event == PM_EVENT_PRETHAW)
 717                 mesg.event = PM_EVENT_FREEZE;
 718         rqpm.pm_state = mesg.event;
 719
 720         ret = ide_do_drive_cmd(drive, &rq, ide_wait);
 721         /* only call ACPI _PS3 after both drivers are suspended */
 722         if (!ret && (((drive->dn % 2) && hwif->drives[0].present
 723                  && hwif->drives[1].present)
 724                  || !hwif->drives[0].present
 725                  || !hwif->drives[1].present))
 726                 ide_acpi_set_state(hwif, 0);
 727         return ret;
 728 }
 729
 730 static int generic_ide_resume(struct device *dev)
 731 {
 732         ide_drive_t *drive = dev->driver_data;
 733         ide_hwif_t *hwif = HWIF(drive);
 734         struct request rq;
 735         struct request_pm_state rqpm;
 736         ide_task_t args;
 737         int err;
 738
 739         /* Call ACPI _STM only once */
 740         if (!(drive->dn % 2)) {
 741                 ide_acpi_set_state(hwif, 1);
 742                 ide_acpi_push_timing(hwif);
 743         }
 744
 745         ide_acpi_exec_tfs(drive);
 746
 747         memset(&rq, 0, sizeof(rq));
 748         memset(&rqpm, 0, sizeof(rqpm));
 749         memset(&args, 0, sizeof(args));
 750         rq.cmd_type = REQ_TYPE_PM_RESUME;
 751         rq.special = &args;
 752         rq.data = &rqpm;
 753         rqpm.pm_step = ide_pm_state_start_resume;
 754         rqpm.pm_state = PM_EVENT_ON;
 755
 756         err = ide_do_drive_cmd(drive, &rq, ide_head_wait);
 757
 758         if (err == 0 && dev->driver) {
 759                 ide_driver_t *drv = to_ide_driver(dev->driver);
 760
 761                 if (drv->resume)
 762                         drv->resume(drive);
 763         }
 764
 765         return err;
 766 }
 767
 768 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
 769                         unsigned int cmd, unsigned long arg)
 770 {
 771         unsigned long flags;
 772         ide_driver_t *drv;
 773         void __user *p = (void __user *)arg;
 774         int err = 0, (*setfunc)(ide_drive_t *, int);
 775         u8 *val;
 776
 777         switch (cmd) {
 778         case HDIO_GET_32BIT:        val = &drive->io_32bit;      goto read_val;
 779         case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
 780         case HDIO_GET_UNMASKINTR:   val = &drive->unmask;        goto read_val;
 781         case HDIO_GET_DMA:          val = &drive->using_dma;     goto read_val;
 782         case HDIO_SET_32BIT:        setfunc = set_io_32bit;      goto set_val;
 783         case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings;     goto set_val;
 784         case HDIO_SET_PIO_MODE:     setfunc = set_pio_mode;      goto set_val;
 785         case HDIO_SET_UNMASKINTR:   setfunc = set_unmaskirq;     goto set_val;
 786         case HDIO_SET_DMA:          setfunc = set_using_dma;     goto set_val;
 787         }
 788
 789         switch (cmd) {
 790                 case HDIO_OBSOLETE_IDENTITY:
 791                 case HDIO_GET_IDENTITY:
 792                         if (bdev != bdev->bd_contains)
 793                                 return -EINVAL;
 794                         if (drive->id_read == 0)
 795                                 return -ENOMSG;
 796                         if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
 797                                 return -EFAULT;
 798                         return 0;
 799
 800                 case HDIO_GET_NICE:
 801                         return put_user(drive->dsc_overlap      <<      IDE_NICE_DSC_OVERLAP    |
 802                                         drive->atapi_overlap    <<      IDE_NICE_ATAPI_OVERLAP  |
 803                                         drive->nice1 << IDE_NICE_1,
 804                                         (long __user *) arg);
 805 #ifdef CONFIG_IDE_TASK_IOCTL
 806                 case HDIO_DRIVE_TASKFILE:
 807                         if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
 808                                 return -EACCES;
 809                         switch(drive->media) {
 810                                 case ide_disk:
 811                                         return ide_taskfile_ioctl(drive, cmd, arg);
 812                                 default:
 813                                         return -ENOMSG;
 814                         }
 815 #endif /* CONFIG_IDE_TASK_IOCTL */
 816
 817                 case HDIO_DRIVE_CMD:
 818                         if (!capable(CAP_SYS_RAWIO))
 819                                 return -EACCES;
 820                         return ide_cmd_ioctl(drive, cmd, arg);
 821
 822                 case HDIO_DRIVE_TASK:
 823                         if (!capable(CAP_SYS_RAWIO))
 824                                 return -EACCES;
 825                         return ide_task_ioctl(drive, cmd, arg);
 826                 case HDIO_SET_NICE:
 827                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
 828                         if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
 829                                 return -EPERM;
 830                         drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
 831                         drv = *(ide_driver_t **)bdev->bd_disk->private_data;
 832                         if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
 833                                 drive->dsc_overlap = 0;
 834                                 return -EPERM;
 835                         }
 836                         drive->nice1 = (arg >> IDE_NICE_1) & 1;
 837                         return 0;
 838                 case HDIO_DRIVE_RESET:
 839                         if (!capable(CAP_SYS_ADMIN))
 840                                 return -EACCES;
 841
 842                         /*
 843                          *      Abort the current command on the
 844                          *      group if there is one, taking
 845                          *      care not to allow anything else
 846                          *      to be queued and to die on the
 847                          *      spot if we miss one somehow
 848                          */
 849
 850                         spin_lock_irqsave(&ide_lock, flags);
 851
 852                         if (HWGROUP(drive)->resetting) {
 853                                 spin_unlock_irqrestore(&ide_lock, flags);
 854                                 return -EBUSY;
 855                         }
 856
 857                         ide_abort(drive, "drive reset");
 858
 859                         BUG_ON(HWGROUP(drive)->handler);
 860
 861                         /* Ensure nothing gets queued after we
 862                            drop the lock. Reset will clear the busy */
 863
 864                         HWGROUP(drive)->busy = 1;
 865                         spin_unlock_irqrestore(&ide_lock, flags);
 866                         (void) ide_do_reset(drive);
 867
 868                         return 0;
 869                 case HDIO_GET_BUSSTATE:
 870                         if (!capable(CAP_SYS_ADMIN))
 871                                 return -EACCES;
 872                         if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
 873                                 return -EFAULT;
 874                         return 0;
 875
 876                 case HDIO_SET_BUSSTATE:
 877                         if (!capable(CAP_SYS_ADMIN))
 878                                 return -EACCES;
 879                         return -EOPNOTSUPP;
 880                 default:
 881                         return -EINVAL;
 882         }
 883
 884 read_val:
 885         mutex_lock(&ide_setting_mtx);
 886         spin_lock_irqsave(&ide_lock, flags);
 887         err = *val;
 888         spin_unlock_irqrestore(&ide_lock, flags);
 889         mutex_unlock(&ide_setting_mtx);
 890         return err >= 0 ? put_user(err, (long __user *)arg) : err;
 891
 892 set_val:
 893         if (bdev != bdev->bd_contains)
 894                 err = -EINVAL;
 895         else {
 896                 if (!capable(CAP_SYS_ADMIN))
 897                         err = -EACCES;
 898                 else {
 899                         mutex_lock(&ide_setting_mtx);
 900                         err = setfunc(drive, arg);
 901                         mutex_unlock(&ide_setting_mtx);
 902                 }
 903         }
 904         return err;
 905 }
 906
 907 EXPORT_SYMBOL(generic_ide_ioctl);
 908
 909 /*
 910  * stridx() returns the offset of c within s,
 911  * or -1 if c is '\0' or not found within s.
 912  */
 913 static int __init stridx (const char *s, char c)
 914 {
 915         char *i = strchr(s, c);
 916         return (i && c) ? i - s : -1;
 917 }
 918
 919 /*
 920  * match_parm() does parsing for ide_setup():
 921  *
 922  * 1. the first char of s must be '='.
 923  * 2. if the remainder matches one of the supplied keywords,
 924  *     the index (1 based) of the keyword is negated and returned.
 925  * 3. if the remainder is a series of no more than max_vals numbers
 926  *     separated by commas, the numbers are saved in vals[] and a
 927  *     count of how many were saved is returned.  Base10 is assumed,
 928  *     and base16 is allowed when prefixed with "0x".
 929  * 4. otherwise, zero is returned.
 930  */
 931 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
 932 {
 933         static const char *decimal = "0123456789";
 934         static const char *hex = "0123456789abcdef";
 935         int i, n;
 936
 937         if (*s++ == '=') {
 938                 /*
 939                  * Try matching against the supplied keywords,
 940                  * and return -(index+1) if we match one
 941                  */
 942                 if (keywords != NULL) {
 943                         for (i = 0; *keywords != NULL; ++i) {
 944                                 if (!strcmp(s, *keywords++))
 945                                         return -(i+1);
 946                         }
 947                 }
 948                 /*
 949                  * Look for a series of no more than "max_vals"
 950                  * numeric values separated by commas, in base10,
 951                  * or base16 when prefixed with "0x".
 952                  * Return a count of how many were found.
 953                  */
 954                 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
 955                         vals[n] = i;
 956                         while ((i = stridx(decimal, *++s)) >= 0)
 957                                 vals[n] = (vals[n] * 10) + i;
 958                         if (*s == 'x' && !vals[n]) {
 959                                 while ((i = stridx(hex, *++s)) >= 0)
 960                                         vals[n] = (vals[n] * 0x10) + i;
 961                         }
 962                         if (++n == max_vals)
 963                                 break;
 964                         if (*s == ',' || *s == ';')
 965                                 ++s;
 966                 }
 967                 if (!*s)
 968                         return n;
 969         }
 970         return 0;       /* zero = nothing matched */
 971 }
 972
 973 extern int probe_ali14xx;
 974 extern int probe_umc8672;
 975 extern int probe_dtc2278;
 976 extern int probe_ht6560b;
 977 extern int probe_qd65xx;
 978 extern int cmd640_vlb;
 979
 980 static int __initdata is_chipset_set;
 981
 982 /*
 983  * ide_setup() gets called VERY EARLY during initialization,
 984  * to handle kernel "command line" strings beginning with "hdx=" or "ide".
 985  *
 986  * Remember to update Documentation/ide/ide.txt if you change something here.
 987  */
 988 static int __init ide_setup(char *s)
 989 {
 990         int i, vals[3];
 991         ide_hwif_t *hwif;
 992         ide_drive_t *drive;
 993         unsigned int hw, unit;
 994         const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
 995         const char max_hwif  = '0' + (MAX_HWIFS - 1);
 996
 997
 998         if (strncmp(s,"hd",2) == 0 && s[2] == '=')      /* hd= is for hd.c   */
 999                 return 0;                               /* driver and not us */
1000
1001         if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1002                 return 0;
1003
1004         printk(KERN_INFO "ide_setup: %s", s);
1005         init_ide_data ();
1006
1007 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1008         if (!strcmp(s, "ide=doubler")) {
1009                 extern int ide_doubler;
1010
1011                 printk(" : Enabled support for IDE doublers\n");
1012                 ide_doubler = 1;
1013                 return 1;
1014         }
1015 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1016
1017         if (!strcmp(s, "ide=nodma")) {
1018                 printk(" : Prevented DMA\n");
1019                 noautodma = 1;
1020                 goto obsolete_option;
1021         }
1022
1023 #ifdef CONFIG_BLK_DEV_IDEACPI
1024         if (!strcmp(s, "ide=noacpi")) {
1025                 //printk(" : Disable IDE ACPI support.\n");
1026                 ide_noacpi = 1;
1027                 return 1;
1028         }
1029         if (!strcmp(s, "ide=acpigtf")) {
1030                 //printk(" : Enable IDE ACPI _GTF support.\n");
1031                 ide_noacpitfs = 0;
1032                 return 1;
1033         }
1034         if (!strcmp(s, "ide=acpionboot")) {
1035                 //printk(" : Call IDE ACPI methods on boot.\n");
1036                 ide_noacpionboot = 0;
1037                 return 1;
1038         }
1039 #endif /* CONFIG_BLK_DEV_IDEACPI */
1040
1041         /*
1042          * Look for drive options:  "hdx="
1043          */
1044         if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1045                 const char *hd_words[] = {
1046                         "none", "noprobe", "nowerr", "cdrom", "nodma",
1047                         "autotune", "noautotune", "-8", "-9", "-10",
1048                         "noflush", "remap", "remap63", "scsi", NULL };
1049                 unit = s[2] - 'a';
1050                 hw   = unit / MAX_DRIVES;
1051                 unit = unit % MAX_DRIVES;
1052                 hwif = &ide_hwifs[hw];
1053                 drive = &hwif->drives[unit];
1054                 if (strncmp(s + 4, "ide-", 4) == 0) {
1055                         strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1056                         goto obsolete_option;
1057                 }
1058                 switch (match_parm(&s[3], hd_words, vals, 3)) {
1059                         case -1: /* "none" */
1060                         case -2: /* "noprobe" */
1061                                 drive->noprobe = 1;
1062                                 goto done;
1063                         case -3: /* "nowerr" */
1064                                 drive->bad_wstat = BAD_R_STAT;
1065                                 hwif->noprobe = 0;
1066                                 goto done;
1067                         case -4: /* "cdrom" */
1068                                 drive->present = 1;
1069                                 drive->media = ide_cdrom;
1070                                 /* an ATAPI device ignores DRDY */
1071                                 drive->ready_stat = 0;
1072                                 hwif->noprobe = 0;
1073                                 goto done;
1074                         case -5: /* nodma */
1075                                 drive->nodma = 1;
1076                                 goto done;
1077                         case -6: /* "autotune" */
1078                                 drive->autotune = IDE_TUNE_AUTO;
1079                                 goto obsolete_option;
1080                         case -7: /* "noautotune" */
1081                                 drive->autotune = IDE_TUNE_NOAUTO;
1082                                 goto obsolete_option;
1083                         case -11: /* noflush */
1084                                 drive->noflush = 1;
1085                                 goto done;
1086                         case -12: /* "remap" */
1087                                 drive->remap_0_to_1 = 1;
1088                                 goto obsolete_option;
1089                         case -13: /* "remap63" */
1090                                 drive->sect0 = 63;
1091                                 goto obsolete_option;
1092                         case -14: /* "scsi" */
1093                                 drive->scsi = 1;
1094                                 goto obsolete_option;
1095                         case 3: /* cyl,head,sect */
1096                                 drive->media    = ide_disk;
1097                                 drive->ready_stat = READY_STAT;
1098                                 drive->cyl      = drive->bios_cyl  = vals[0];
1099                                 drive->head     = drive->bios_head = vals[1];
1100                                 drive->sect     = drive->bios_sect = vals[2];
1101                                 drive->present  = 1;
1102                                 drive->forced_geom = 1;
1103                                 hwif->noprobe = 0;
1104                                 goto done;
1105                         default:
1106                                 goto bad_option;
1107                 }
1108         }
1109
1110         if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1111                 goto bad_option;
1112         /*
1113          * Look for bus speed option:  "idebus="
1114          */
1115         if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1116                 if (match_parm(&s[6], NULL, vals, 1) != 1)
1117                         goto bad_option;
1118                 if (vals[0] >= 20 && vals[0] <= 66) {
1119                         idebus_parameter = vals[0];
1120                 } else
1121                         printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1122                 goto done;
1123         }
1124         /*
1125          * Look for interface options:  "idex="
1126          */
1127         if (s[3] >= '0' && s[3] <= max_hwif) {
1128                 /*
1129                  * Be VERY CAREFUL changing this: note hardcoded indexes below
1130                  * (-8, -9, -10) are reserved to ease the hardcoding.
1131                  */
1132                 static const char *ide_words[] = {
1133                         "noprobe", "serialize", "minus3", "minus4",
1134                         "reset", "minus6", "ata66", "minus8", "minus9",
1135                         "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1136                         "dtc2278", "umc8672", "ali14xx", NULL };
1137
1138                 hw = s[3] - '0';
1139                 hwif = &ide_hwifs[hw];
1140                 i = match_parm(&s[4], ide_words, vals, 3);
1141
1142                 /*
1143                  * Cryptic check to ensure chipset not already set for hwif.
1144                  * Note: we can't depend on hwif->chipset here.
1145                  */
1146                 if (i >= -18 && i <= -11) {
1147                         /* chipset already specified */
1148                         if (is_chipset_set)
1149                                 goto bad_option;
1150                         /* these drivers are for "ide0=" only */
1151                         if (hw != 0)
1152                                 goto bad_hwif;
1153                         is_chipset_set = 1;
1154                         printk("\n");
1155                 }
1156
1157                 switch (i) {
1158 #ifdef CONFIG_BLK_DEV_ALI14XX
1159                         case -17: /* "ali14xx" */
1160                                 probe_ali14xx = 1;
1161                                 goto obsolete_option;
1162 #endif
1163 #ifdef CONFIG_BLK_DEV_UMC8672
1164                         case -16: /* "umc8672" */
1165                                 probe_umc8672 = 1;
1166                                 goto obsolete_option;
1167 #endif
1168 #ifdef CONFIG_BLK_DEV_DTC2278
1169                         case -15: /* "dtc2278" */
1170                                 probe_dtc2278 = 1;
1171                                 goto obsolete_option;
1172 #endif
1173 #ifdef CONFIG_BLK_DEV_CMD640
1174                         case -14: /* "cmd640_vlb" */
1175                                 cmd640_vlb = 1;
1176                                 goto obsolete_option;
1177 #endif
1178 #ifdef CONFIG_BLK_DEV_HT6560B
1179                         case -13: /* "ht6560b" */
1180                                 probe_ht6560b = 1;
1181                                 goto obsolete_option;
1182 #endif
1183 #ifdef CONFIG_BLK_DEV_QD65XX
1184                         case -12: /* "qd65xx" */
1185                                 probe_qd65xx = 1;
1186                                 goto obsolete_option;
1187 #endif
1188 #ifdef CONFIG_BLK_DEV_4DRIVES
1189                         case -11: /* "four" drives on one set of ports */
1190                         {
1191                                 ide_hwif_t *mate = &ide_hwifs[hw^1];
1192                                 mate->drives[0].select.all ^= 0x20;
1193                                 mate->drives[1].select.all ^= 0x20;
1194                                 hwif->chipset = mate->chipset = ide_4drives;
1195                                 mate->irq = hwif->irq;
1196                                 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1197                                 hwif->mate = mate;
1198                                 mate->mate = hwif;
1199                                 hwif->serialized = mate->serialized = 1;
1200                                 goto obsolete_option;
1201                         }
1202 #endif /* CONFIG_BLK_DEV_4DRIVES */
1203                         case -10: /* minus10 */
1204                         case -9: /* minus9 */
1205                         case -8: /* minus8 */
1206                         case -6:
1207                         case -4:
1208                         case -3:
1209                                 goto bad_option;
1210                         case -7: /* ata66 */
1211 #ifdef CONFIG_BLK_DEV_IDEPCI
1212                                 /*
1213                                  * Use ATA_CBL_PATA40_SHORT so drive side
1214                                  * cable detection is also overriden.
1215                                  */
1216                                 hwif->cbl = ATA_CBL_PATA40_SHORT;
1217                                 goto obsolete_option;
1218 #else
1219                                 goto bad_hwif;
1220 #endif
1221                         case -5: /* "reset" */
1222                                 hwif->reset = 1;
1223                                 goto obsolete_option;
1224                         case -2: /* "serialize" */
1225                                 hwif->mate = &ide_hwifs[hw^1];
1226                                 hwif->mate->mate = hwif;
1227                                 hwif->serialized = hwif->mate->serialized = 1;
1228                                 goto obsolete_option;
1229
1230                         case -1: /* "noprobe" */
1231                                 hwif->noprobe = 1;
1232                                 goto obsolete_option;
1233                         case 0:
1234                         case 1:
1235                         case 2:
1236                         case 3:
1237                                 goto bad_option;
1238                         default:
1239                                 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1240                                 return 1;
1241                 }
1242         }
1243 bad_option:
1244         printk(" -- BAD OPTION\n");
1245         return 1;
1246 obsolete_option:
1247         printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1248         return 1;
1249 bad_hwif:
1250         printk("-- NOT SUPPORTED ON ide%d", hw);
1251 done:
1252         printk("\n");
1253         return 1;
1254 }
1255
1256 EXPORT_SYMBOL(ide_lock);
1257
1258 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1259 {
1260         return 1;
1261 }
1262
1263 static char *media_string(ide_drive_t *drive)
1264 {
1265         switch (drive->media) {
1266         case ide_disk:
1267                 return "disk";
1268         case ide_cdrom:
1269                 return "cdrom";
1270         case ide_tape:
1271                 return "tape";
1272         case ide_floppy:
1273                 return "floppy";
1274         case ide_optical:
1275                 return "optical";
1276         default:
1277                 return "UNKNOWN";
1278         }
1279 }
1280
1281 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1282 {
1283         ide_drive_t *drive = to_ide_device(dev);
1284         return sprintf(buf, "%s\n", media_string(drive));
1285 }
1286
1287 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1288 {
1289         ide_drive_t *drive = to_ide_device(dev);
1290         return sprintf(buf, "%s\n", drive->name);
1291 }
1292
1293 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1294 {
1295         ide_drive_t *drive = to_ide_device(dev);
1296         return sprintf(buf, "ide:m-%s\n", media_string(drive));
1297 }
1298
1299 static ssize_t model_show(struct device *dev, struct device_attribute *attr,
1300                           char *buf)
1301 {
1302         ide_drive_t *drive = to_ide_device(dev);
1303         return sprintf(buf, "%s\n", drive->id->model);
1304 }
1305
1306 static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
1307                              char *buf)
1308 {
1309         ide_drive_t *drive = to_ide_device(dev);
1310         return sprintf(buf, "%s\n", drive->id->fw_rev);
1311 }
1312
1313 static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
1314                            char *buf)
1315 {
1316         ide_drive_t *drive = to_ide_device(dev);
1317         return sprintf(buf, "%s\n", drive->id->serial_no);
1318 }
1319
1320 static struct device_attribute ide_dev_attrs[] = {
1321         __ATTR_RO(media),
1322         __ATTR_RO(drivename),
1323         __ATTR_RO(modalias),
1324         __ATTR_RO(model),
1325         __ATTR_RO(firmware),
1326         __ATTR(serial, 0400, serial_show, NULL),
1327         __ATTR_NULL
1328 };
1329
1330 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
1331 {
1332         ide_drive_t *drive = to_ide_device(dev);
1333
1334         add_uevent_var(env, "MEDIA=%s", media_string(drive));
1335         add_uevent_var(env, "DRIVENAME=%s", drive->name);
1336         add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
1337         return 0;
1338 }
1339
1340 static int generic_ide_probe(struct device *dev)
1341 {
1342         ide_drive_t *drive = to_ide_device(dev);
1343         ide_driver_t *drv = to_ide_driver(dev->driver);
1344
1345         return drv->probe ? drv->probe(drive) : -ENODEV;
1346 }
1347
1348 static int generic_ide_remove(struct device *dev)
1349 {
1350         ide_drive_t *drive = to_ide_device(dev);
1351         ide_driver_t *drv = to_ide_driver(dev->driver);
1352
1353         if (drv->remove)
1354                 drv->remove(drive);
1355
1356         return 0;
1357 }
1358
1359 static void generic_ide_shutdown(struct device *dev)
1360 {
1361         ide_drive_t *drive = to_ide_device(dev);
1362         ide_driver_t *drv = to_ide_driver(dev->driver);
1363
1364         if (dev->driver && drv->shutdown)
1365                 drv->shutdown(drive);
1366 }
1367
1368 struct bus_type ide_bus_type = {
1369         .name           = "ide",
1370         .match          = ide_bus_match,
1371         .uevent         = ide_uevent,
1372         .probe          = generic_ide_probe,
1373         .remove         = generic_ide_remove,
1374         .shutdown       = generic_ide_shutdown,
1375         .dev_attrs      = ide_dev_attrs,
1376         .suspend        = generic_ide_suspend,
1377         .resume         = generic_ide_resume,
1378 };
1379
1380 EXPORT_SYMBOL_GPL(ide_bus_type);
1381
1382 static void ide_port_class_release(struct device *portdev)
1383 {
1384         ide_hwif_t *hwif = dev_get_drvdata(portdev);
1385
1386         put_device(&hwif->gendev);
1387 }
1388
1389 /*
1390  * This is gets invoked once during initialization, to set *everything* up
1391  */
1392 static int __init ide_init(void)
1393 {
1394         int ret;
1395
1396         printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n");
1397         system_bus_speed = ide_system_bus_speed();
1398
1399         printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
1400                          "for PIO modes%s\n", system_bus_speed,
1401                         idebus_parameter ? "" : "; override with idebus=xx");
1402
1403         ret = bus_register(&ide_bus_type);
1404         if (ret < 0) {
1405                 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1406                 return ret;
1407         }
1408
1409         ide_port_class = class_create(THIS_MODULE, "ide_port");
1410         if (IS_ERR(ide_port_class)) {
1411                 ret = PTR_ERR(ide_port_class);
1412                 goto out_port_class;
1413         }
1414         ide_port_class->dev_release = ide_port_class_release;
1415
1416         init_ide_data();
1417
1418         proc_ide_create();
1419
1420         return 0;
1421
1422 out_port_class:
1423         bus_unregister(&ide_bus_type);
1424
1425         return ret;
1426 }
1427
1428 #ifdef MODULE
1429 static char *options = NULL;
1430 module_param(options, charp, 0);
1431 MODULE_LICENSE("GPL");
1432
1433 static void __init parse_options (char *line)
1434 {
1435         char *next = line;
1436
1437         if (line == NULL || !*line)
1438                 return;
1439         while ((line = next) != NULL) {
1440                 if ((next = strchr(line,' ')) != NULL)
1441                         *next++ = 0;
1442                 if (!ide_setup(line))
1443                         printk (KERN_INFO "Unknown option '%s'\n", line);
1444         }
1445 }
1446
1447 int __init init_module (void)
1448 {
1449         parse_options(options);
1450         return ide_init();
1451 }
1452
1453 void __exit cleanup_module (void)
1454 {
1455         int index;
1456
1457         for (index = 0; index < MAX_HWIFS; ++index)
1458                 ide_unregister(index);
1459
1460         proc_ide_destroy();
1461
1462         class_destroy(ide_port_class);
1463
1464         bus_unregister(&ide_bus_type);
1465 }
1466
1467 #else /* !MODULE */
1468
1469 __setup("", ide_setup);
1470
1471 module_init(ide_init);
1472
1473 #endif /* MODULE */