drivers/ide/ide.c

   1 /*
   2  *  Copyright (C) 1994-1998         Linus Torvalds & authors (see below)
   3  *  Copyrifht (C) 2003-2005, 2007   Bartlomiej Zolnierkiewicz
   4  */
   5
   6 /*
   7  *  Mostly written by Mark Lord  <mlord@pobox.com>
   8  *                and Gadi Oxman <gadio@netvision.net.il>
   9  *                and Andre Hedrick <andre@linux-ide.org>
  10  *
  11  *  See linux/MAINTAINERS for address of current maintainer.
  12  *
  13  * This is the multiple IDE interface driver, as evolved from hd.c.
  14  * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs
  15  *   (usually 14 & 15).
  16  * There can be up to two drives per interface, as per the ATA-2 spec.
  17  *
  18  * ...
  19  *
  20  *  From hd.c:
  21  *  |
  22  *  | It traverses the request-list, using interrupts to jump between functions.
  23  *  | As nearly all functions can be called within interrupts, we may not sleep.
  24  *  | Special care is recommended.  Have Fun!
  25  *  |
  26  *  | modified by Drew Eckhardt to check nr of hd's from the CMOS.
  27  *  |
  28  *  | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
  29  *  | in the early extended-partition checks and added DM partitions.
  30  *  |
  31  *  | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
  32  *  |
  33  *  | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
  34  *  | and general streamlining by Mark Lord (mlord@pobox.com).
  35  *
  36  *  October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
  37  *
  38  *      Mark Lord       (mlord@pobox.com)               (IDE Perf.Pkg)
  39  *      Delman Lee      (delman@ieee.org)               ("Mr. atdisk2")
  40  *      Scott Snyder    (snyder@fnald0.fnal.gov)        (ATAPI IDE cd-rom)
  41  *
  42  *  This was a rewrite of just about everything from hd.c, though some original
  43  *  code is still sprinkled about.  Think of it as a major evolution, with
  44  *  inspiration from lots of linux users, esp.  hamish@zot.apana.org.au
  45  */
  46
  47 #define _IDE_C                  /* Tell ide.h it's really us */
  48
  49 #include <linux/module.h>
  50 #include <linux/types.h>
  51 #include <linux/string.h>
  52 #include <linux/kernel.h>
  53 #include <linux/timer.h>
  54 #include <linux/mm.h>
  55 #include <linux/interrupt.h>
  56 #include <linux/major.h>
  57 #include <linux/errno.h>
  58 #include <linux/genhd.h>
  59 #include <linux/blkpg.h>
  60 #include <linux/slab.h>
  61 #include <linux/init.h>
  62 #include <linux/pci.h>
  63 #include <linux/delay.h>
  64 #include <linux/ide.h>
  65 #include <linux/completion.h>
  66 #include <linux/reboot.h>
  67 #include <linux/cdrom.h>
  68 #include <linux/seq_file.h>
  69 #include <linux/device.h>
  70 #include <linux/bitops.h>
  71
  72 #include <asm/byteorder.h>
  73 #include <asm/irq.h>
  74 #include <asm/uaccess.h>
  75 #include <asm/io.h>
  76
  77
  78 /* default maximum number of failures */
  79 #define IDE_DEFAULT_MAX_FAILURES        1
  80
  81 struct class *ide_port_class;
  82
  83 static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
  84                                         IDE2_MAJOR, IDE3_MAJOR,
  85                                         IDE4_MAJOR, IDE5_MAJOR,
  86                                         IDE6_MAJOR, IDE7_MAJOR,
  87                                         IDE8_MAJOR, IDE9_MAJOR };
  88
  89 static int idebus_parameter;    /* holds the "idebus=" parameter */
  90 static int system_bus_speed;    /* holds what we think is VESA/PCI bus speed */
  91
  92 DEFINE_MUTEX(ide_cfg_mtx);
  93  __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
  94
  95 int noautodma = 0;
  96
  97 ide_hwif_t ide_hwifs[MAX_HWIFS];        /* master data repository */
  98
  99 static void ide_port_init_devices_data(ide_hwif_t *);
 100
 101 /*
 102  * Do not even *think* about calling this!
 103  */
 104 void ide_init_port_data(ide_hwif_t *hwif, unsigned int index)
 105 {
 106         /* bulk initialize hwif & drive info with zeros */
 107         memset(hwif, 0, sizeof(ide_hwif_t));
 108
 109         /* fill in any non-zero initial values */
 110         hwif->index     = index;
 111         hwif->major     = ide_hwif_to_major[index];
 112
 113         hwif->name[0]   = 'i';
 114         hwif->name[1]   = 'd';
 115         hwif->name[2]   = 'e';
 116         hwif->name[3]   = '0' + index;
 117
 118         hwif->bus_state = BUSSTATE_ON;
 119
 120         init_completion(&hwif->gendev_rel_comp);
 121
 122         default_hwif_iops(hwif);
 123         default_hwif_transport(hwif);
 124
 125         ide_port_init_devices_data(hwif);
 126 }
 127 EXPORT_SYMBOL_GPL(ide_init_port_data);
 128
 129 static void ide_port_init_devices_data(ide_hwif_t *hwif)
 130 {
 131         int unit;
 132
 133         for (unit = 0; unit < MAX_DRIVES; ++unit) {
 134                 ide_drive_t *drive = &hwif->drives[unit];
 135                 u8 j = (hwif->index * MAX_DRIVES) + unit;
 136
 137                 memset(drive, 0, sizeof(*drive));
 138
 139                 drive->media                    = ide_disk;
 140                 drive->select.all               = (unit<<4)|0xa0;
 141                 drive->hwif                     = hwif;
 142                 drive->ctl                      = 0x08;
 143                 drive->ready_stat               = READY_STAT;
 144                 drive->bad_wstat                = BAD_W_STAT;
 145                 drive->special.b.recalibrate    = 1;
 146                 drive->special.b.set_geometry   = 1;
 147                 drive->name[0]                  = 'h';
 148                 drive->name[1]                  = 'd';
 149                 drive->name[2]                  = 'a' + j;
 150                 drive->max_failures             = IDE_DEFAULT_MAX_FAILURES;
 151
 152                 INIT_LIST_HEAD(&drive->list);
 153                 init_completion(&drive->gendev_rel_comp);
 154         }
 155 }
 156
 157 /*
 158  * init_ide_data() sets reasonable default values into all fields
 159  * of all instances of the hwifs and drives, but only on the first call.
 160  * Subsequent calls have no effect (they don't wipe out anything).
 161  *
 162  * This routine is normally called at driver initialization time,
 163  * but may also be called MUCH earlier during kernel "command-line"
 164  * parameter processing.  As such, we cannot depend on any other parts
 165  * of the kernel (such as memory allocation) to be functioning yet.
 166  *
 167  * This is too bad, as otherwise we could dynamically allocate the
 168  * ide_drive_t structs as needed, rather than always consuming memory
 169  * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
 170  *
 171  * FIXME: We should stuff the setup data into __init and copy the
 172  * relevant hwifs/allocate them properly during boot.
 173  */
 174 #define MAGIC_COOKIE 0x12345678
 175 static void __init init_ide_data (void)
 176 {
 177         unsigned int index;
 178         static unsigned long magic_cookie = MAGIC_COOKIE;
 179
 180         if (magic_cookie != MAGIC_COOKIE)
 181                 return;         /* already initialized */
 182         magic_cookie = 0;
 183
 184         /* Initialise all interface structures */
 185         for (index = 0; index < MAX_HWIFS; ++index) {
 186                 ide_hwif_t *hwif = &ide_hwifs[index];
 187
 188                 ide_init_port_data(hwif, index);
 189         }
 190 }
 191
 192 /**
 193  *      ide_system_bus_speed    -       guess bus speed
 194  *
 195  *      ide_system_bus_speed() returns what we think is the system VESA/PCI
 196  *      bus speed (in MHz). This is used for calculating interface PIO timings.
 197  *      The default is 40 for known PCI systems, 50 otherwise.
 198  *      The "idebus=xx" parameter can be used to override this value.
 199  *      The actual value to be used is computed/displayed the first time
 200  *      through. Drivers should only use this as a last resort.
 201  *
 202  *      Returns a guessed speed in MHz.
 203  */
 204
 205 static int ide_system_bus_speed(void)
 206 {
 207 #ifdef CONFIG_PCI
 208         static struct pci_device_id pci_default[] = {
 209                 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
 210                 { }
 211         };
 212 #else
 213 #define pci_default 0
 214 #endif /* CONFIG_PCI */
 215
 216         /* user supplied value */
 217         if (idebus_parameter)
 218                 return idebus_parameter;
 219
 220         /* safe default value for PCI or VESA and PCI*/
 221         return pci_dev_present(pci_default) ? 33 : 50;
 222 }
 223
 224 void ide_remove_port_from_hwgroup(ide_hwif_t *hwif)
 225 {
 226         ide_hwgroup_t *hwgroup = hwif->hwgroup;
 227
 228         spin_lock_irq(&ide_lock);
 229         /*
 230          * Remove us from the hwgroup, and free
 231          * the hwgroup if we were the only member
 232          */
 233         if (hwif->next == hwif) {
 234                 BUG_ON(hwgroup->hwif != hwif);
 235                 kfree(hwgroup);
 236         } else {
 237                 /* There is another interface in hwgroup.
 238                  * Unlink us, and set hwgroup->drive and ->hwif to
 239                  * something sane.
 240                  */
 241                 ide_hwif_t *g = hwgroup->hwif;
 242
 243                 while (g->next != hwif)
 244                         g = g->next;
 245                 g->next = hwif->next;
 246                 if (hwgroup->hwif == hwif) {
 247                         /* Chose a random hwif for hwgroup->hwif.
 248                          * It's guaranteed that there are no drives
 249                          * left in the hwgroup.
 250                          */
 251                         BUG_ON(hwgroup->drive != NULL);
 252                         hwgroup->hwif = g;
 253                 }
 254                 BUG_ON(hwgroup->hwif == hwif);
 255         }
 256         spin_unlock_irq(&ide_lock);
 257 }
 258
 259 /* Called with ide_lock held. */
 260 static void __ide_port_unregister_devices(ide_hwif_t *hwif)
 261 {
 262         int i;
 263
 264         for (i = 0; i < MAX_DRIVES; i++) {
 265                 ide_drive_t *drive = &hwif->drives[i];
 266
 267                 if (drive->present) {
 268                         spin_unlock_irq(&ide_lock);
 269                         device_unregister(&drive->gendev);
 270                         wait_for_completion(&drive->gendev_rel_comp);
 271                         spin_lock_irq(&ide_lock);
 272                 }
 273         }
 274 }
 275
 276 void ide_port_unregister_devices(ide_hwif_t *hwif)
 277 {
 278         mutex_lock(&ide_cfg_mtx);
 279         spin_lock_irq(&ide_lock);
 280         __ide_port_unregister_devices(hwif);
 281         hwif->present = 0;
 282         ide_port_init_devices_data(hwif);
 283         spin_unlock_irq(&ide_lock);
 284         mutex_unlock(&ide_cfg_mtx);
 285 }
 286 EXPORT_SYMBOL_GPL(ide_port_unregister_devices);
 287
 288 /**
 289  *      ide_unregister          -       free an IDE interface
 290  *      @index: index of interface (will change soon to a pointer)
 291  *
 292  *      Perform the final unregister of an IDE interface. At the moment
 293  *      we don't refcount interfaces so this will also get split up.
 294  *
 295  *      Locking:
 296  *      The caller must not hold the IDE locks
 297  *      The drive present/vanishing is not yet properly locked
 298  *      Take care with the callbacks. These have been split to avoid
 299  *      deadlocking the IDE layer. The shutdown callback is called
 300  *      before we take the lock and free resources. It is up to the
 301  *      caller to be sure there is no pending I/O here, and that
 302  *      the interface will not be reopened (present/vanishing locking
 303  *      isn't yet done BTW). After we commit to the final kill we
 304  *      call the cleanup callback with the ide locks held.
 305  *
 306  *      Unregister restores the hwif structures to the default state.
 307  *      This is raving bonkers.
 308  */
 309
 310 void ide_unregister(unsigned int index)
 311 {
 312         ide_hwif_t *hwif, *g;
 313         ide_hwgroup_t *hwgroup;
 314         int irq_count = 0;
 315
 316         BUG_ON(index >= MAX_HWIFS);
 317
 318         BUG_ON(in_interrupt());
 319         BUG_ON(irqs_disabled());
 320         mutex_lock(&ide_cfg_mtx);
 321         spin_lock_irq(&ide_lock);
 322         hwif = &ide_hwifs[index];
 323         if (!hwif->present)
 324                 goto abort;
 325         __ide_port_unregister_devices(hwif);
 326         hwif->present = 0;
 327
 328         spin_unlock_irq(&ide_lock);
 329
 330         ide_proc_unregister_port(hwif);
 331
 332         hwgroup = hwif->hwgroup;
 333         /*
 334          * free the irq if we were the only hwif using it
 335          */
 336         g = hwgroup->hwif;
 337         do {
 338                 if (g->irq == hwif->irq)
 339                         ++irq_count;
 340                 g = g->next;
 341         } while (g != hwgroup->hwif);
 342         if (irq_count == 1)
 343                 free_irq(hwif->irq, hwgroup);
 344
 345         ide_remove_port_from_hwgroup(hwif);
 346
 347         device_unregister(hwif->portdev);
 348         device_unregister(&hwif->gendev);
 349         wait_for_completion(&hwif->gendev_rel_comp);
 350
 351         /*
 352          * Remove us from the kernel's knowledge
 353          */
 354         blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
 355         kfree(hwif->sg_table);
 356         unregister_blkdev(hwif->major, hwif->name);
 357         spin_lock_irq(&ide_lock);
 358
 359         if (hwif->dma_base)
 360                 ide_release_dma_engine(hwif);
 361
 362         /* restore hwif data to pristine status */
 363         ide_init_port_data(hwif, index);
 364
 365 abort:
 366         spin_unlock_irq(&ide_lock);
 367         mutex_unlock(&ide_cfg_mtx);
 368 }
 369
 370 EXPORT_SYMBOL(ide_unregister);
 371
 372 void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw)
 373 {
 374         memcpy(hwif->io_ports, hw->io_ports, sizeof(hwif->io_ports));
 375         hwif->irq = hw->irq;
 376         hwif->chipset = hw->chipset;
 377         hwif->gendev.parent = hw->dev;
 378         hwif->ack_intr = hw->ack_intr;
 379 }
 380 EXPORT_SYMBOL_GPL(ide_init_port_hw);
 381
 382 /*
 383  *      Locks for IDE setting functionality
 384  */
 385
 386 DEFINE_MUTEX(ide_setting_mtx);
 387
 388 EXPORT_SYMBOL_GPL(ide_setting_mtx);
 389
 390 /**
 391  *      ide_spin_wait_hwgroup   -       wait for group
 392  *      @drive: drive in the group
 393  *
 394  *      Wait for an IDE device group to go non busy and then return
 395  *      holding the ide_lock which guards the hwgroup->busy status
 396  *      and right to use it.
 397  */
 398
 399 int ide_spin_wait_hwgroup (ide_drive_t *drive)
 400 {
 401         ide_hwgroup_t *hwgroup = HWGROUP(drive);
 402         unsigned long timeout = jiffies + (3 * HZ);
 403
 404         spin_lock_irq(&ide_lock);
 405
 406         while (hwgroup->busy) {
 407                 unsigned long lflags;
 408                 spin_unlock_irq(&ide_lock);
 409                 local_irq_set(lflags);
 410                 if (time_after(jiffies, timeout)) {
 411                         local_irq_restore(lflags);
 412                         printk(KERN_ERR "%s: channel busy\n", drive->name);
 413                         return -EBUSY;
 414                 }
 415                 local_irq_restore(lflags);
 416                 spin_lock_irq(&ide_lock);
 417         }
 418         return 0;
 419 }
 420
 421 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
 422
 423 int set_io_32bit(ide_drive_t *drive, int arg)
 424 {
 425         if (drive->no_io_32bit)
 426                 return -EPERM;
 427
 428         if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
 429                 return -EINVAL;
 430
 431         if (ide_spin_wait_hwgroup(drive))
 432                 return -EBUSY;
 433
 434         drive->io_32bit = arg;
 435
 436         spin_unlock_irq(&ide_lock);
 437
 438         return 0;
 439 }
 440
 441 static int set_ksettings(ide_drive_t *drive, int arg)
 442 {
 443         if (arg < 0 || arg > 1)
 444                 return -EINVAL;
 445
 446         if (ide_spin_wait_hwgroup(drive))
 447                 return -EBUSY;
 448         drive->keep_settings = arg;
 449         spin_unlock_irq(&ide_lock);
 450
 451         return 0;
 452 }
 453
 454 int set_using_dma(ide_drive_t *drive, int arg)
 455 {
 456 #ifdef CONFIG_BLK_DEV_IDEDMA
 457         ide_hwif_t *hwif = drive->hwif;
 458         int err = -EPERM;
 459
 460         if (arg < 0 || arg > 1)
 461                 return -EINVAL;
 462
 463         if (!drive->id || !(drive->id->capability & 1))
 464                 goto out;
 465
 466         if (hwif->dma_ops == NULL)
 467                 goto out;
 468
 469         err = -EBUSY;
 470         if (ide_spin_wait_hwgroup(drive))
 471                 goto out;
 472         /*
 473          * set ->busy flag, unlock and let it ride
 474          */
 475         hwif->hwgroup->busy = 1;
 476         spin_unlock_irq(&ide_lock);
 477
 478         err = 0;
 479
 480         if (arg) {
 481                 if (ide_set_dma(drive))
 482                         err = -EIO;
 483         } else
 484                 ide_dma_off(drive);
 485
 486         /*
 487          * lock, clear ->busy flag and unlock before leaving
 488          */
 489         spin_lock_irq(&ide_lock);
 490         hwif->hwgroup->busy = 0;
 491         spin_unlock_irq(&ide_lock);
 492 out:
 493         return err;
 494 #else
 495         if (arg < 0 || arg > 1)
 496                 return -EINVAL;
 497
 498         return -EPERM;
 499 #endif
 500 }
 501
 502 int set_pio_mode(ide_drive_t *drive, int arg)
 503 {
 504         struct request rq;
 505         ide_hwif_t *hwif = drive->hwif;
 506         const struct ide_port_ops *port_ops = hwif->port_ops;
 507
 508         if (arg < 0 || arg > 255)
 509                 return -EINVAL;
 510
 511         if (port_ops == NULL || port_ops->set_pio_mode == NULL ||
 512             (hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
 513                 return -ENOSYS;
 514
 515         if (drive->special.b.set_tune)
 516                 return -EBUSY;
 517
 518         ide_init_drive_cmd(&rq);
 519         rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
 520
 521         drive->tune_req = (u8) arg;
 522         drive->special.b.set_tune = 1;
 523         (void) ide_do_drive_cmd(drive, &rq, ide_wait);
 524         return 0;
 525 }
 526
 527 static int set_unmaskirq(ide_drive_t *drive, int arg)
 528 {
 529         if (drive->no_unmask)
 530                 return -EPERM;
 531
 532         if (arg < 0 || arg > 1)
 533                 return -EINVAL;
 534
 535         if (ide_spin_wait_hwgroup(drive))
 536                 return -EBUSY;
 537         drive->unmask = arg;
 538         spin_unlock_irq(&ide_lock);
 539
 540         return 0;
 541 }
 542
 543 /**
 544  *      system_bus_clock        -       clock guess
 545  *
 546  *      External version of the bus clock guess used by very old IDE drivers
 547  *      for things like VLB timings. Should not be used.
 548  */
 549
 550 int system_bus_clock (void)
 551 {
 552         return system_bus_speed;
 553 }
 554
 555 EXPORT_SYMBOL(system_bus_clock);
 556
 557 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
 558 {
 559         ide_drive_t *drive = dev->driver_data;
 560         ide_hwif_t *hwif = HWIF(drive);
 561         struct request rq;
 562         struct request_pm_state rqpm;
 563         ide_task_t args;
 564         int ret;
 565
 566         /* Call ACPI _GTM only once */
 567         if (!(drive->dn % 2))
 568                 ide_acpi_get_timing(hwif);
 569
 570         memset(&rq, 0, sizeof(rq));
 571         memset(&rqpm, 0, sizeof(rqpm));
 572         memset(&args, 0, sizeof(args));
 573         rq.cmd_type = REQ_TYPE_PM_SUSPEND;
 574         rq.special = &args;
 575         rq.data = &rqpm;
 576         rqpm.pm_step = ide_pm_state_start_suspend;
 577         if (mesg.event == PM_EVENT_PRETHAW)
 578                 mesg.event = PM_EVENT_FREEZE;
 579         rqpm.pm_state = mesg.event;
 580
 581         ret = ide_do_drive_cmd(drive, &rq, ide_wait);
 582         /* only call ACPI _PS3 after both drivers are suspended */
 583         if (!ret && (((drive->dn % 2) && hwif->drives[0].present
 584                  && hwif->drives[1].present)
 585                  || !hwif->drives[0].present
 586                  || !hwif->drives[1].present))
 587                 ide_acpi_set_state(hwif, 0);
 588         return ret;
 589 }
 590
 591 static int generic_ide_resume(struct device *dev)
 592 {
 593         ide_drive_t *drive = dev->driver_data;
 594         ide_hwif_t *hwif = HWIF(drive);
 595         struct request rq;
 596         struct request_pm_state rqpm;
 597         ide_task_t args;
 598         int err;
 599
 600         /* Call ACPI _STM only once */
 601         if (!(drive->dn % 2)) {
 602                 ide_acpi_set_state(hwif, 1);
 603                 ide_acpi_push_timing(hwif);
 604         }
 605
 606         ide_acpi_exec_tfs(drive);
 607
 608         memset(&rq, 0, sizeof(rq));
 609         memset(&rqpm, 0, sizeof(rqpm));
 610         memset(&args, 0, sizeof(args));
 611         rq.cmd_type = REQ_TYPE_PM_RESUME;
 612         rq.special = &args;
 613         rq.data = &rqpm;
 614         rqpm.pm_step = ide_pm_state_start_resume;
 615         rqpm.pm_state = PM_EVENT_ON;
 616
 617         err = ide_do_drive_cmd(drive, &rq, ide_head_wait);
 618
 619         if (err == 0 && dev->driver) {
 620                 ide_driver_t *drv = to_ide_driver(dev->driver);
 621
 622                 if (drv->resume)
 623                         drv->resume(drive);
 624         }
 625
 626         return err;
 627 }
 628
 629 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
 630                         unsigned int cmd, unsigned long arg)
 631 {
 632         unsigned long flags;
 633         ide_driver_t *drv;
 634         void __user *p = (void __user *)arg;
 635         int err = 0, (*setfunc)(ide_drive_t *, int);
 636         u8 *val;
 637
 638         switch (cmd) {
 639         case HDIO_GET_32BIT:        val = &drive->io_32bit;      goto read_val;
 640         case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
 641         case HDIO_GET_UNMASKINTR:   val = &drive->unmask;        goto read_val;
 642         case HDIO_GET_DMA:          val = &drive->using_dma;     goto read_val;
 643         case HDIO_SET_32BIT:        setfunc = set_io_32bit;      goto set_val;
 644         case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings;     goto set_val;
 645         case HDIO_SET_PIO_MODE:     setfunc = set_pio_mode;      goto set_val;
 646         case HDIO_SET_UNMASKINTR:   setfunc = set_unmaskirq;     goto set_val;
 647         case HDIO_SET_DMA:          setfunc = set_using_dma;     goto set_val;
 648         }
 649
 650         switch (cmd) {
 651                 case HDIO_OBSOLETE_IDENTITY:
 652                 case HDIO_GET_IDENTITY:
 653                         if (bdev != bdev->bd_contains)
 654                                 return -EINVAL;
 655                         if (drive->id_read == 0)
 656                                 return -ENOMSG;
 657                         if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
 658                                 return -EFAULT;
 659                         return 0;
 660
 661                 case HDIO_GET_NICE:
 662                         return put_user(drive->dsc_overlap      <<      IDE_NICE_DSC_OVERLAP    |
 663                                         drive->atapi_overlap    <<      IDE_NICE_ATAPI_OVERLAP  |
 664                                         drive->nice1 << IDE_NICE_1,
 665                                         (long __user *) arg);
 666 #ifdef CONFIG_IDE_TASK_IOCTL
 667                 case HDIO_DRIVE_TASKFILE:
 668                         if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
 669                                 return -EACCES;
 670                         switch(drive->media) {
 671                                 case ide_disk:
 672                                         return ide_taskfile_ioctl(drive, cmd, arg);
 673                                 default:
 674                                         return -ENOMSG;
 675                         }
 676 #endif /* CONFIG_IDE_TASK_IOCTL */
 677
 678                 case HDIO_DRIVE_CMD:
 679                         if (!capable(CAP_SYS_RAWIO))
 680                                 return -EACCES;
 681                         return ide_cmd_ioctl(drive, cmd, arg);
 682
 683                 case HDIO_DRIVE_TASK:
 684                         if (!capable(CAP_SYS_RAWIO))
 685                                 return -EACCES;
 686                         return ide_task_ioctl(drive, cmd, arg);
 687                 case HDIO_SET_NICE:
 688                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
 689                         if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
 690                                 return -EPERM;
 691                         drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
 692                         drv = *(ide_driver_t **)bdev->bd_disk->private_data;
 693                         if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
 694                                 drive->dsc_overlap = 0;
 695                                 return -EPERM;
 696                         }
 697                         drive->nice1 = (arg >> IDE_NICE_1) & 1;
 698                         return 0;
 699                 case HDIO_DRIVE_RESET:
 700                         if (!capable(CAP_SYS_ADMIN))
 701                                 return -EACCES;
 702
 703                         /*
 704                          *      Abort the current command on the
 705                          *      group if there is one, taking
 706                          *      care not to allow anything else
 707                          *      to be queued and to die on the
 708                          *      spot if we miss one somehow
 709                          */
 710
 711                         spin_lock_irqsave(&ide_lock, flags);
 712
 713                         if (HWGROUP(drive)->resetting) {
 714                                 spin_unlock_irqrestore(&ide_lock, flags);
 715                                 return -EBUSY;
 716                         }
 717
 718                         ide_abort(drive, "drive reset");
 719
 720                         BUG_ON(HWGROUP(drive)->handler);
 721
 722                         /* Ensure nothing gets queued after we
 723                            drop the lock. Reset will clear the busy */
 724
 725                         HWGROUP(drive)->busy = 1;
 726                         spin_unlock_irqrestore(&ide_lock, flags);
 727                         (void) ide_do_reset(drive);
 728
 729                         return 0;
 730                 case HDIO_GET_BUSSTATE:
 731                         if (!capable(CAP_SYS_ADMIN))
 732                                 return -EACCES;
 733                         if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
 734                                 return -EFAULT;
 735                         return 0;
 736
 737                 case HDIO_SET_BUSSTATE:
 738                         if (!capable(CAP_SYS_ADMIN))
 739                                 return -EACCES;
 740                         return -EOPNOTSUPP;
 741                 default:
 742                         return -EINVAL;
 743         }
 744
 745 read_val:
 746         mutex_lock(&ide_setting_mtx);
 747         spin_lock_irqsave(&ide_lock, flags);
 748         err = *val;
 749         spin_unlock_irqrestore(&ide_lock, flags);
 750         mutex_unlock(&ide_setting_mtx);
 751         return err >= 0 ? put_user(err, (long __user *)arg) : err;
 752
 753 set_val:
 754         if (bdev != bdev->bd_contains)
 755                 err = -EINVAL;
 756         else {
 757                 if (!capable(CAP_SYS_ADMIN))
 758                         err = -EACCES;
 759                 else {
 760                         mutex_lock(&ide_setting_mtx);
 761                         err = setfunc(drive, arg);
 762                         mutex_unlock(&ide_setting_mtx);
 763                 }
 764         }
 765         return err;
 766 }
 767
 768 EXPORT_SYMBOL(generic_ide_ioctl);
 769
 770 /*
 771  * stridx() returns the offset of c within s,
 772  * or -1 if c is '\0' or not found within s.
 773  */
 774 static int __init stridx (const char *s, char c)
 775 {
 776         char *i = strchr(s, c);
 777         return (i && c) ? i - s : -1;
 778 }
 779
 780 /*
 781  * match_parm() does parsing for ide_setup():
 782  *
 783  * 1. the first char of s must be '='.
 784  * 2. if the remainder matches one of the supplied keywords,
 785  *     the index (1 based) of the keyword is negated and returned.
 786  * 3. if the remainder is a series of no more than max_vals numbers
 787  *     separated by commas, the numbers are saved in vals[] and a
 788  *     count of how many were saved is returned.  Base10 is assumed,
 789  *     and base16 is allowed when prefixed with "0x".
 790  * 4. otherwise, zero is returned.
 791  */
 792 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
 793 {
 794         static const char *decimal = "0123456789";
 795         static const char *hex = "0123456789abcdef";
 796         int i, n;
 797
 798         if (*s++ == '=') {
 799                 /*
 800                  * Try matching against the supplied keywords,
 801                  * and return -(index+1) if we match one
 802                  */
 803                 if (keywords != NULL) {
 804                         for (i = 0; *keywords != NULL; ++i) {
 805                                 if (!strcmp(s, *keywords++))
 806                                         return -(i+1);
 807                         }
 808                 }
 809                 /*
 810                  * Look for a series of no more than "max_vals"
 811                  * numeric values separated by commas, in base10,
 812                  * or base16 when prefixed with "0x".
 813                  * Return a count of how many were found.
 814                  */
 815                 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
 816                         vals[n] = i;
 817                         while ((i = stridx(decimal, *++s)) >= 0)
 818                                 vals[n] = (vals[n] * 10) + i;
 819                         if (*s == 'x' && !vals[n]) {
 820                                 while ((i = stridx(hex, *++s)) >= 0)
 821                                         vals[n] = (vals[n] * 0x10) + i;
 822                         }
 823                         if (++n == max_vals)
 824                                 break;
 825                         if (*s == ',' || *s == ';')
 826                                 ++s;
 827                 }
 828                 if (!*s)
 829                         return n;
 830         }
 831         return 0;       /* zero = nothing matched */
 832 }
 833
 834 /*
 835  * ide_setup() gets called VERY EARLY during initialization,
 836  * to handle kernel "command line" strings beginning with "hdx=" or "ide".
 837  *
 838  * Remember to update Documentation/ide/ide.txt if you change something here.
 839  */
 840 static int __init ide_setup(char *s)
 841 {
 842         ide_hwif_t *hwif;
 843         ide_drive_t *drive;
 844         unsigned int hw, unit;
 845         int vals[3];
 846         const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
 847
 848         if (strncmp(s,"hd",2) == 0 && s[2] == '=')      /* hd= is for hd.c   */
 849                 return 0;                               /* driver and not us */
 850
 851         if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
 852                 return 0;
 853
 854         printk(KERN_INFO "ide_setup: %s", s);
 855         init_ide_data ();
 856
 857 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
 858         if (!strcmp(s, "ide=doubler")) {
 859                 extern int ide_doubler;
 860
 861                 printk(" : Enabled support for IDE doublers\n");
 862                 ide_doubler = 1;
 863                 goto obsolete_option;
 864         }
 865 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
 866
 867         if (!strcmp(s, "ide=nodma")) {
 868                 printk(" : Prevented DMA\n");
 869                 noautodma = 1;
 870                 goto obsolete_option;
 871         }
 872
 873 #ifdef CONFIG_BLK_DEV_IDEACPI
 874         if (!strcmp(s, "ide=noacpi")) {
 875                 //printk(" : Disable IDE ACPI support.\n");
 876                 ide_noacpi = 1;
 877                 goto obsolete_option;
 878         }
 879         if (!strcmp(s, "ide=acpigtf")) {
 880                 //printk(" : Enable IDE ACPI _GTF support.\n");
 881                 ide_acpigtf = 1;
 882                 goto obsolete_option;
 883         }
 884         if (!strcmp(s, "ide=acpionboot")) {
 885                 //printk(" : Call IDE ACPI methods on boot.\n");
 886                 ide_acpionboot = 1;
 887                 goto obsolete_option;
 888         }
 889 #endif /* CONFIG_BLK_DEV_IDEACPI */
 890
 891         /*
 892          * Look for drive options:  "hdx="
 893          */
 894         if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
 895                 const char *hd_words[] = {
 896                         "none", "noprobe", "nowerr", "cdrom", "nodma",
 897                         "-6", "-7", "-8", "-9", "-10",
 898                         "noflush", "remap", "remap63", "scsi", NULL };
 899                 unit = s[2] - 'a';
 900                 hw   = unit / MAX_DRIVES;
 901                 unit = unit % MAX_DRIVES;
 902                 hwif = &ide_hwifs[hw];
 903                 drive = &hwif->drives[unit];
 904                 if (strncmp(s + 4, "ide-", 4) == 0) {
 905                         strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
 906                         goto obsolete_option;
 907                 }
 908                 switch (match_parm(&s[3], hd_words, vals, 3)) {
 909                         case -1: /* "none" */
 910                         case -2: /* "noprobe" */
 911                                 drive->noprobe = 1;
 912                                 goto obsolete_option;
 913                         case -3: /* "nowerr" */
 914                                 drive->bad_wstat = BAD_R_STAT;
 915                                 goto obsolete_option;
 916                         case -4: /* "cdrom" */
 917                                 drive->present = 1;
 918                                 drive->media = ide_cdrom;
 919                                 /* an ATAPI device ignores DRDY */
 920                                 drive->ready_stat = 0;
 921                                 goto obsolete_option;
 922                         case -5: /* nodma */
 923                                 drive->nodma = 1;
 924                                 goto obsolete_option;
 925                         case -11: /* noflush */
 926                                 drive->noflush = 1;
 927                                 goto obsolete_option;
 928                         case -12: /* "remap" */
 929                                 drive->remap_0_to_1 = 1;
 930                                 goto obsolete_option;
 931                         case -13: /* "remap63" */
 932                                 drive->sect0 = 63;
 933                                 goto obsolete_option;
 934                         case -14: /* "scsi" */
 935                                 drive->scsi = 1;
 936                                 goto obsolete_option;
 937                         case 3: /* cyl,head,sect */
 938                                 drive->media    = ide_disk;
 939                                 drive->ready_stat = READY_STAT;
 940                                 drive->cyl      = drive->bios_cyl  = vals[0];
 941                                 drive->head     = drive->bios_head = vals[1];
 942                                 drive->sect     = drive->bios_sect = vals[2];
 943                                 drive->present  = 1;
 944                                 drive->forced_geom = 1;
 945                                 goto obsolete_option;
 946                         default:
 947                                 goto bad_option;
 948                 }
 949         }
 950
 951         if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
 952                 goto bad_option;
 953         /*
 954          * Look for bus speed option:  "idebus="
 955          */
 956         if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
 957                 if (match_parm(&s[6], NULL, vals, 1) != 1)
 958                         goto bad_option;
 959                 if (vals[0] >= 20 && vals[0] <= 66) {
 960                         idebus_parameter = vals[0];
 961                 } else
 962                         printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
 963                 goto obsolete_option;
 964         }
 965
 966 bad_option:
 967         printk(" -- BAD OPTION\n");
 968         return 1;
 969 obsolete_option:
 970         printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
 971         return 1;
 972 }
 973
 974 EXPORT_SYMBOL(ide_lock);
 975
 976 static int ide_bus_match(struct device *dev, struct device_driver *drv)
 977 {
 978         return 1;
 979 }
 980
 981 static char *media_string(ide_drive_t *drive)
 982 {
 983         switch (drive->media) {
 984         case ide_disk:
 985                 return "disk";
 986         case ide_cdrom:
 987                 return "cdrom";
 988         case ide_tape:
 989                 return "tape";
 990         case ide_floppy:
 991                 return "floppy";
 992         case ide_optical:
 993                 return "optical";
 994         default:
 995                 return "UNKNOWN";
 996         }
 997 }
 998
 999 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1000 {
1001         ide_drive_t *drive = to_ide_device(dev);
1002         return sprintf(buf, "%s\n", media_string(drive));
1003 }
1004
1005 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1006 {
1007         ide_drive_t *drive = to_ide_device(dev);
1008         return sprintf(buf, "%s\n", drive->name);
1009 }
1010
1011 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1012 {
1013         ide_drive_t *drive = to_ide_device(dev);
1014         return sprintf(buf, "ide:m-%s\n", media_string(drive));
1015 }
1016
1017 static ssize_t model_show(struct device *dev, struct device_attribute *attr,
1018                           char *buf)
1019 {
1020         ide_drive_t *drive = to_ide_device(dev);
1021         return sprintf(buf, "%s\n", drive->id->model);
1022 }
1023
1024 static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
1025                              char *buf)
1026 {
1027         ide_drive_t *drive = to_ide_device(dev);
1028         return sprintf(buf, "%s\n", drive->id->fw_rev);
1029 }
1030
1031 static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
1032                            char *buf)
1033 {
1034         ide_drive_t *drive = to_ide_device(dev);
1035         return sprintf(buf, "%s\n", drive->id->serial_no);
1036 }
1037
1038 static struct device_attribute ide_dev_attrs[] = {
1039         __ATTR_RO(media),
1040         __ATTR_RO(drivename),
1041         __ATTR_RO(modalias),
1042         __ATTR_RO(model),
1043         __ATTR_RO(firmware),
1044         __ATTR(serial, 0400, serial_show, NULL),
1045         __ATTR_NULL
1046 };
1047
1048 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
1049 {
1050         ide_drive_t *drive = to_ide_device(dev);
1051
1052         add_uevent_var(env, "MEDIA=%s", media_string(drive));
1053         add_uevent_var(env, "DRIVENAME=%s", drive->name);
1054         add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
1055         return 0;
1056 }
1057
1058 static int generic_ide_probe(struct device *dev)
1059 {
1060         ide_drive_t *drive = to_ide_device(dev);
1061         ide_driver_t *drv = to_ide_driver(dev->driver);
1062
1063         return drv->probe ? drv->probe(drive) : -ENODEV;
1064 }
1065
1066 static int generic_ide_remove(struct device *dev)
1067 {
1068         ide_drive_t *drive = to_ide_device(dev);
1069         ide_driver_t *drv = to_ide_driver(dev->driver);
1070
1071         if (drv->remove)
1072                 drv->remove(drive);
1073
1074         return 0;
1075 }
1076
1077 static void generic_ide_shutdown(struct device *dev)
1078 {
1079         ide_drive_t *drive = to_ide_device(dev);
1080         ide_driver_t *drv = to_ide_driver(dev->driver);
1081
1082         if (dev->driver && drv->shutdown)
1083                 drv->shutdown(drive);
1084 }
1085
1086 struct bus_type ide_bus_type = {
1087         .name           = "ide",
1088         .match          = ide_bus_match,
1089         .uevent         = ide_uevent,
1090         .probe          = generic_ide_probe,
1091         .remove         = generic_ide_remove,
1092         .shutdown       = generic_ide_shutdown,
1093         .dev_attrs      = ide_dev_attrs,
1094         .suspend        = generic_ide_suspend,
1095         .resume         = generic_ide_resume,
1096 };
1097
1098 EXPORT_SYMBOL_GPL(ide_bus_type);
1099
1100 static void ide_port_class_release(struct device *portdev)
1101 {
1102         ide_hwif_t *hwif = dev_get_drvdata(portdev);
1103
1104         put_device(&hwif->gendev);
1105 }
1106
1107 int ide_vlb_clk;
1108 EXPORT_SYMBOL_GPL(ide_vlb_clk);
1109
1110 module_param_named(vlb_clock, ide_vlb_clk, int, 0);
1111 MODULE_PARM_DESC(vlb_clock, "VLB clock frequency (in MHz)");
1112
1113 int ide_pci_clk;
1114 EXPORT_SYMBOL_GPL(ide_pci_clk);
1115
1116 module_param_named(pci_clock, ide_pci_clk, int, 0);
1117 MODULE_PARM_DESC(pci_clock, "PCI bus clock frequency (in MHz)");
1118
1119 static int ide_set_dev_param_mask(const char *s, struct kernel_param *kp)
1120 {
1121         int a, b, i, j = 1;
1122         unsigned int *dev_param_mask = (unsigned int *)kp->arg;
1123
1124         if (sscanf(s, "%d.%d:%d", &a, &b, &j) != 3 &&
1125             sscanf(s, "%d.%d", &a, &b) != 2)
1126                 return -EINVAL;
1127
1128         i = a * MAX_DRIVES + b;
1129
1130         if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1)
1131                 return -EINVAL;
1132
1133         if (j)
1134                 *dev_param_mask |= (1 << i);
1135         else
1136                 *dev_param_mask &= (1 << i);
1137
1138         return 0;
1139 }
1140
1141 static unsigned int ide_nodma;
1142
1143 module_param_call(nodma, ide_set_dev_param_mask, NULL, &ide_nodma, 0);
1144 MODULE_PARM_DESC(nodma, "disallow DMA for a device");
1145
1146 static unsigned int ide_noflush;
1147
1148 module_param_call(noflush, ide_set_dev_param_mask, NULL, &ide_noflush, 0);
1149 MODULE_PARM_DESC(noflush, "disable flush requests for a device");
1150
1151 static unsigned int ide_noprobe;
1152
1153 module_param_call(noprobe, ide_set_dev_param_mask, NULL, &ide_noprobe, 0);
1154 MODULE_PARM_DESC(noprobe, "skip probing for a device");
1155
1156 static unsigned int ide_nowerr;
1157
1158 module_param_call(nowerr, ide_set_dev_param_mask, NULL, &ide_nowerr, 0);
1159 MODULE_PARM_DESC(nowerr, "ignore the WRERR_STAT bit for a device");
1160
1161 static unsigned int ide_cdroms;
1162
1163 module_param_call(cdrom, ide_set_dev_param_mask, NULL, &ide_cdroms, 0);
1164 MODULE_PARM_DESC(cdrom, "force device as a CD-ROM");
1165
1166 struct chs_geom {
1167         unsigned int    cyl;
1168         u8              head;
1169         u8              sect;
1170 };
1171
1172 static unsigned int ide_disks;
1173 static struct chs_geom ide_disks_chs[MAX_HWIFS * MAX_DRIVES];
1174
1175 static int ide_set_disk_chs(const char *str, struct kernel_param *kp)
1176 {
1177         int a, b, c = 0, h = 0, s = 0, i, j = 1;
1178
1179         if (sscanf(str, "%d.%d:%d,%d,%d", &a, &b, &c, &h, &s) != 5 &&
1180             sscanf(str, "%d.%d:%d", &a, &b, &j) != 3)
1181                 return -EINVAL;
1182
1183         i = a * MAX_DRIVES + b;
1184
1185         if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1)
1186                 return -EINVAL;
1187
1188         if (c > INT_MAX || h > 255 || s > 255)
1189                 return -EINVAL;
1190
1191         if (j)
1192                 ide_disks |= (1 << i);
1193         else
1194                 ide_disks &= (1 << i);
1195
1196         ide_disks_chs[i].cyl  = c;
1197         ide_disks_chs[i].head = h;
1198         ide_disks_chs[i].sect = s;
1199
1200         return 0;
1201 }
1202
1203 module_param_call(chs, ide_set_disk_chs, NULL, NULL, 0);
1204 MODULE_PARM_DESC(chs, "force device as a disk (using CHS)");
1205
1206 static void ide_dev_apply_params(ide_drive_t *drive)
1207 {
1208         int i = drive->hwif->index * MAX_DRIVES + drive->select.b.unit;
1209
1210         if (ide_nodma & (1 << i)) {
1211                 printk(KERN_INFO "ide: disallowing DMA for %s\n", drive->name);
1212                 drive->nodma = 1;
1213         }
1214         if (ide_noflush & (1 << i)) {
1215                 printk(KERN_INFO "ide: disabling flush requests for %s\n",
1216                                  drive->name);
1217                 drive->noflush = 1;
1218         }
1219         if (ide_noprobe & (1 << i)) {
1220                 printk(KERN_INFO "ide: skipping probe for %s\n", drive->name);
1221                 drive->noprobe = 1;
1222         }
1223         if (ide_nowerr & (1 << i)) {
1224                 printk(KERN_INFO "ide: ignoring the WRERR_STAT bit for %s\n",
1225                                  drive->name);
1226                 drive->bad_wstat = BAD_R_STAT;
1227         }
1228         if (ide_cdroms & (1 << i)) {
1229                 printk(KERN_INFO "ide: forcing %s as a CD-ROM\n", drive->name);
1230                 drive->present = 1;
1231                 drive->media = ide_cdrom;
1232                 /* an ATAPI device ignores DRDY */
1233                 drive->ready_stat = 0;
1234         }
1235         if (ide_disks & (1 << i)) {
1236                 drive->cyl  = drive->bios_cyl  = ide_disks_chs[i].cyl;
1237                 drive->head = drive->bios_head = ide_disks_chs[i].head;
1238                 drive->sect = drive->bios_sect = ide_disks_chs[i].sect;
1239                 drive->forced_geom = 1;
1240                 printk(KERN_INFO "ide: forcing %s as a disk (%d/%d/%d)\n",
1241                                  drive->name,
1242                                  drive->cyl, drive->head, drive->sect);
1243                 drive->present = 1;
1244                 drive->media = ide_disk;
1245                 drive->ready_stat = READY_STAT;
1246         }
1247 }
1248
1249 static unsigned int ide_ignore_cable;
1250
1251 static int ide_set_ignore_cable(const char *s, struct kernel_param *kp)
1252 {
1253         int i, j = 1;
1254
1255         if (sscanf(s, "%d:%d", &i, &j) != 2 && sscanf(s, "%d", &i) != 1)
1256                 return -EINVAL;
1257
1258         if (i >= MAX_HWIFS || j < 0 || j > 1)
1259                 return -EINVAL;
1260
1261         if (j)
1262                 ide_ignore_cable |= (1 << i);
1263         else
1264                 ide_ignore_cable &= (1 << i);
1265
1266         return 0;
1267 }
1268
1269 module_param_call(ignore_cable, ide_set_ignore_cable, NULL, NULL, 0);
1270 MODULE_PARM_DESC(ignore_cable, "ignore cable detection");
1271
1272 void ide_port_apply_params(ide_hwif_t *hwif)
1273 {
1274         int i;
1275
1276         if (ide_ignore_cable & (1 << hwif->index)) {
1277                 printk(KERN_INFO "ide: ignoring cable detection for %s\n",
1278                                  hwif->name);
1279                 hwif->cbl = ATA_CBL_PATA40_SHORT;
1280         }
1281
1282         for (i = 0; i < MAX_DRIVES; i++)
1283                 ide_dev_apply_params(&hwif->drives[i]);
1284 }
1285
1286 /*
1287  * This is gets invoked once during initialization, to set *everything* up
1288  */
1289 static int __init ide_init(void)
1290 {
1291         int ret;
1292
1293         printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n");
1294         system_bus_speed = ide_system_bus_speed();
1295
1296         printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
1297                          "for PIO modes%s\n", system_bus_speed,
1298                         idebus_parameter ? "" : "; override with idebus=xx");
1299
1300         ret = bus_register(&ide_bus_type);
1301         if (ret < 0) {
1302                 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1303                 return ret;
1304         }
1305
1306         ide_port_class = class_create(THIS_MODULE, "ide_port");
1307         if (IS_ERR(ide_port_class)) {
1308                 ret = PTR_ERR(ide_port_class);
1309                 goto out_port_class;
1310         }
1311         ide_port_class->dev_release = ide_port_class_release;
1312
1313         init_ide_data();
1314
1315         proc_ide_create();
1316
1317         return 0;
1318
1319 out_port_class:
1320         bus_unregister(&ide_bus_type);
1321
1322         return ret;
1323 }
1324
1325 #ifdef MODULE
1326 static char *options = NULL;
1327 module_param(options, charp, 0);
1328 MODULE_LICENSE("GPL");
1329
1330 static void __init parse_options (char *line)
1331 {
1332         char *next = line;
1333
1334         if (line == NULL || !*line)
1335                 return;
1336         while ((line = next) != NULL) {
1337                 if ((next = strchr(line,' ')) != NULL)
1338                         *next++ = 0;
1339                 if (!ide_setup(line))
1340                         printk (KERN_INFO "Unknown option '%s'\n", line);
1341         }
1342 }
1343
1344 int __init init_module (void)
1345 {
1346         parse_options(options);
1347         return ide_init();
1348 }
1349
1350 void __exit cleanup_module (void)
1351 {
1352         int index;
1353
1354         for (index = 0; index < MAX_HWIFS; ++index)
1355                 ide_unregister(index);
1356
1357         proc_ide_destroy();
1358
1359         class_destroy(ide_port_class);
1360
1361         bus_unregister(&ide_bus_type);
1362 }
1363
1364 #else /* !MODULE */
1365
1366 __setup("", ide_setup);
1367
1368 module_init(ide_init);
1369
1370 #endif /* MODULE */