err.no Git - linux-2.6/blob - drivers/ide/ide.c

   1 /*
   2  *  linux/drivers/ide/ide.c             Version 7.00beta2       Mar 05 2003
   3  *
   4  *  Copyright (C) 1994-1998  Linus Torvalds & authors (see below)
   5  */
   6
   7 /*
   8  *  Mostly written by Mark Lord  <mlord@pobox.com>
   9  *                and Gadi Oxman <gadio@netvision.net.il>
  10  *                and Andre Hedrick <andre@linux-ide.org>
  11  *
  12  *  See linux/MAINTAINERS for address of current maintainer.
  13  *
  14  * This is the multiple IDE interface driver, as evolved from hd.c.
  15  * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs
  16  *   (usually 14 & 15).
  17  * There can be up to two drives per interface, as per the ATA-2 spec.
  18  *
  19  * ...
  20  *
  21  *  From hd.c:
  22  *  |
  23  *  | It traverses the request-list, using interrupts to jump between functions.
  24  *  | As nearly all functions can be called within interrupts, we may not sleep.
  25  *  | Special care is recommended.  Have Fun!
  26  *  |
  27  *  | modified by Drew Eckhardt to check nr of hd's from the CMOS.
  28  *  |
  29  *  | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
  30  *  | in the early extended-partition checks and added DM partitions.
  31  *  |
  32  *  | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
  33  *  |
  34  *  | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
  35  *  | and general streamlining by Mark Lord (mlord@pobox.com).
  36  *
  37  *  October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
  38  *
  39  *      Mark Lord       (mlord@pobox.com)               (IDE Perf.Pkg)
  40  *      Delman Lee      (delman@ieee.org)               ("Mr. atdisk2")
  41  *      Scott Snyder    (snyder@fnald0.fnal.gov)        (ATAPI IDE cd-rom)
  42  *
  43  *  This was a rewrite of just about everything from hd.c, though some original
  44  *  code is still sprinkled about.  Think of it as a major evolution, with
  45  *  inspiration from lots of linux users, esp.  hamish@zot.apana.org.au
  46  */
  47
  48 #define REVISION        "Revision: 7.00alpha2"
  49 #define VERSION         "Id: ide.c 7.00a2 20020906"
  50
  51 #define _IDE_C                  /* Tell ide.h it's really us */
  52
  53 #include <linux/module.h>
  54 #include <linux/types.h>
  55 #include <linux/string.h>
  56 #include <linux/kernel.h>
  57 #include <linux/timer.h>
  58 #include <linux/mm.h>
  59 #include <linux/interrupt.h>
  60 #include <linux/major.h>
  61 #include <linux/errno.h>
  62 #include <linux/genhd.h>
  63 #include <linux/blkpg.h>
  64 #include <linux/slab.h>
  65 #include <linux/init.h>
  66 #include <linux/pci.h>
  67 #include <linux/delay.h>
  68 #include <linux/ide.h>
  69 #include <linux/completion.h>
  70 #include <linux/reboot.h>
  71 #include <linux/cdrom.h>
  72 #include <linux/seq_file.h>
  73 #include <linux/device.h>
  74 #include <linux/bitops.h>
  75
  76 #include <asm/byteorder.h>
  77 #include <asm/irq.h>
  78 #include <asm/uaccess.h>
  79 #include <asm/io.h>
  80
  81
  82 /* default maximum number of failures */
  83 #define IDE_DEFAULT_MAX_FAILURES        1
  84
  85 static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
  86                                         IDE2_MAJOR, IDE3_MAJOR,
  87                                         IDE4_MAJOR, IDE5_MAJOR,
  88                                         IDE6_MAJOR, IDE7_MAJOR,
  89                                         IDE8_MAJOR, IDE9_MAJOR };
  90
  91 static int idebus_parameter;    /* holds the "idebus=" parameter */
  92 static int system_bus_speed;    /* holds what we think is VESA/PCI bus speed */
  93
  94 DEFINE_MUTEX(ide_cfg_mtx);
  95  __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
  96
  97 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
  98 static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
  99 #endif
 100
 101 int noautodma = 0;
 102
 103 #ifdef CONFIG_BLK_DEV_IDEACPI
 104 int ide_noacpi = 0;
 105 int ide_noacpitfs = 1;
 106 int ide_noacpionboot = 1;
 107 #endif
 108
 109 /*
 110  * This is declared extern in ide.h, for access by other IDE modules:
 111  */
 112 ide_hwif_t ide_hwifs[MAX_HWIFS];        /* master data repository */
 113
 114 EXPORT_SYMBOL(ide_hwifs);
 115
 116 /*
 117  * Do not even *think* about calling this!
 118  */
 119 static void init_hwif_data(ide_hwif_t *hwif, unsigned int index)
 120 {
 121         unsigned int unit;
 122
 123         /* bulk initialize hwif & drive info with zeros */
 124         memset(hwif, 0, sizeof(ide_hwif_t));
 125
 126         /* fill in any non-zero initial values */
 127         hwif->index     = index;
 128         hwif->major     = ide_hwif_to_major[index];
 129
 130         hwif->name[0]   = 'i';
 131         hwif->name[1]   = 'd';
 132         hwif->name[2]   = 'e';
 133         hwif->name[3]   = '0' + index;
 134
 135         hwif->bus_state = BUSSTATE_ON;
 136
 137         init_completion(&hwif->gendev_rel_comp);
 138
 139         default_hwif_iops(hwif);
 140         default_hwif_transport(hwif);
 141         for (unit = 0; unit < MAX_DRIVES; ++unit) {
 142                 ide_drive_t *drive = &hwif->drives[unit];
 143
 144                 drive->media                    = ide_disk;
 145                 drive->select.all               = (unit<<4)|0xa0;
 146                 drive->hwif                     = hwif;
 147                 drive->ctl                      = 0x08;
 148                 drive->ready_stat               = READY_STAT;
 149                 drive->bad_wstat                = BAD_W_STAT;
 150                 drive->special.b.recalibrate    = 1;
 151                 drive->special.b.set_geometry   = 1;
 152                 drive->name[0]                  = 'h';
 153                 drive->name[1]                  = 'd';
 154                 drive->name[2]                  = 'a' + (index * MAX_DRIVES) + unit;
 155                 drive->max_failures             = IDE_DEFAULT_MAX_FAILURES;
 156                 drive->using_dma                = 0;
 157                 drive->vdma                     = 0;
 158                 INIT_LIST_HEAD(&drive->list);
 159                 init_completion(&drive->gendev_rel_comp);
 160         }
 161 }
 162
 163 static void init_hwif_default(ide_hwif_t *hwif, unsigned int index)
 164 {
 165         hw_regs_t hw;
 166
 167         memset(&hw, 0, sizeof(hw_regs_t));
 168
 169         ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq);
 170
 171         memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
 172
 173         hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
 174 #ifdef CONFIG_BLK_DEV_HD
 175         if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA)
 176                 hwif->noprobe = 1;      /* may be overridden by ide_setup() */
 177 #endif
 178 }
 179
 180 extern void ide_arm_init(void);
 181
 182 /*
 183  * init_ide_data() sets reasonable default values into all fields
 184  * of all instances of the hwifs and drives, but only on the first call.
 185  * Subsequent calls have no effect (they don't wipe out anything).
 186  *
 187  * This routine is normally called at driver initialization time,
 188  * but may also be called MUCH earlier during kernel "command-line"
 189  * parameter processing.  As such, we cannot depend on any other parts
 190  * of the kernel (such as memory allocation) to be functioning yet.
 191  *
 192  * This is too bad, as otherwise we could dynamically allocate the
 193  * ide_drive_t structs as needed, rather than always consuming memory
 194  * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
 195  *
 196  * FIXME: We should stuff the setup data into __init and copy the
 197  * relevant hwifs/allocate them properly during boot.
 198  */
 199 #define MAGIC_COOKIE 0x12345678
 200 static void __init init_ide_data (void)
 201 {
 202         ide_hwif_t *hwif;
 203         unsigned int index;
 204         static unsigned long magic_cookie = MAGIC_COOKIE;
 205
 206         if (magic_cookie != MAGIC_COOKIE)
 207                 return;         /* already initialized */
 208         magic_cookie = 0;
 209
 210         /* Initialise all interface structures */
 211         for (index = 0; index < MAX_HWIFS; ++index) {
 212                 hwif = &ide_hwifs[index];
 213                 init_hwif_data(hwif, index);
 214                 init_hwif_default(hwif, index);
 215 #if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
 216                 hwif->irq =
 217                         ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
 218 #endif
 219         }
 220 #ifdef CONFIG_IDE_ARM
 221         ide_arm_init();
 222 #endif
 223 }
 224
 225 /**
 226  *      ide_system_bus_speed    -       guess bus speed
 227  *
 228  *      ide_system_bus_speed() returns what we think is the system VESA/PCI
 229  *      bus speed (in MHz). This is used for calculating interface PIO timings.
 230  *      The default is 40 for known PCI systems, 50 otherwise.
 231  *      The "idebus=xx" parameter can be used to override this value.
 232  *      The actual value to be used is computed/displayed the first time
 233  *      through. Drivers should only use this as a last resort.
 234  *
 235  *      Returns a guessed speed in MHz.
 236  */
 237
 238 static int ide_system_bus_speed(void)
 239 {
 240 #ifdef CONFIG_PCI
 241         static struct pci_device_id pci_default[] = {
 242                 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
 243                 { }
 244         };
 245 #else
 246 #define pci_default 0
 247 #endif /* CONFIG_PCI */
 248
 249         if (!system_bus_speed) {
 250                 if (idebus_parameter) {
 251                         /* user supplied value */
 252                         system_bus_speed = idebus_parameter;
 253                 } else if (pci_dev_present(pci_default)) {
 254                         /* safe default value for PCI */
 255                         system_bus_speed = 33;
 256                 } else {
 257                         /* safe default value for VESA and PCI */
 258                         system_bus_speed = 50;
 259                 }
 260                 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
 261                         "for PIO modes%s\n", system_bus_speed,
 262                         idebus_parameter ? "" : "; override with idebus=xx");
 263         }
 264         return system_bus_speed;
 265 }
 266
 267 ide_hwif_t * ide_find_port(unsigned long base)
 268 {
 269         ide_hwif_t *hwif;
 270         int i;
 271
 272         for (i = 0; i < MAX_HWIFS; i++) {
 273                 hwif = &ide_hwifs[i];
 274                 if (hwif->io_ports[IDE_DATA_OFFSET] == base)
 275                         goto found;
 276         }
 277
 278         for (i = 0; i < MAX_HWIFS; i++) {
 279                 hwif = &ide_hwifs[i];
 280                 if (hwif->io_ports[IDE_DATA_OFFSET] == 0)
 281                         goto found;
 282         }
 283
 284         hwif = NULL;
 285 found:
 286         return hwif;
 287 }
 288
 289 EXPORT_SYMBOL_GPL(ide_find_port);
 290
 291 static struct resource* hwif_request_region(ide_hwif_t *hwif,
 292                                             unsigned long addr, int num)
 293 {
 294         struct resource *res = request_region(addr, num, hwif->name);
 295
 296         if (!res)
 297                 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
 298                                 hwif->name, addr, addr+num-1);
 299         return res;
 300 }
 301
 302 /**
 303  *      ide_hwif_request_regions - request resources for IDE
 304  *      @hwif: interface to use
 305  *
 306  *      Requests all the needed resources for an interface.
 307  *      Right now core IDE code does this work which is deeply wrong.
 308  *      MMIO leaves it to the controller driver,
 309  *      PIO will migrate this way over time.
 310  */
 311
 312 int ide_hwif_request_regions(ide_hwif_t *hwif)
 313 {
 314         unsigned long addr;
 315         unsigned int i;
 316
 317         if (hwif->mmio)
 318                 return 0;
 319         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
 320         if (addr && !hwif_request_region(hwif, addr, 1))
 321                 goto control_region_busy;
 322         hwif->straight8 = 0;
 323         addr = hwif->io_ports[IDE_DATA_OFFSET];
 324         if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
 325                 if (!hwif_request_region(hwif, addr, 8))
 326                         goto data_region_busy;
 327                 hwif->straight8 = 1;
 328                 return 0;
 329         }
 330         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
 331                 addr = hwif->io_ports[i];
 332                 if (!hwif_request_region(hwif, addr, 1)) {
 333                         while (--i)
 334                                 release_region(addr, 1);
 335                         goto data_region_busy;
 336                 }
 337         }
 338         return 0;
 339
 340 data_region_busy:
 341         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
 342         if (addr)
 343                 release_region(addr, 1);
 344 control_region_busy:
 345         /* If any errors are return, we drop the hwif interface. */
 346         return -EBUSY;
 347 }
 348
 349 /**
 350  *      ide_hwif_release_regions - free IDE resources
 351  *
 352  *      Note that we only release the standard ports,
 353  *      and do not even try to handle any extra ports
 354  *      allocated for weird IDE interface chipsets.
 355  *
 356  *      Note also that we don't yet handle mmio resources here. More
 357  *      importantly our caller should be doing this so we need to
 358  *      restructure this as a helper function for drivers.
 359  */
 360
 361 void ide_hwif_release_regions(ide_hwif_t *hwif)
 362 {
 363         u32 i = 0;
 364
 365         if (hwif->mmio)
 366                 return;
 367         if (hwif->io_ports[IDE_CONTROL_OFFSET])
 368                 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
 369         if (hwif->straight8) {
 370                 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
 371                 return;
 372         }
 373         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
 374                 if (hwif->io_ports[i])
 375                         release_region(hwif->io_ports[i], 1);
 376 }
 377
 378 /**
 379  *      ide_hwif_restore        -       restore hwif to template
 380  *      @hwif: hwif to update
 381  *      @tmp_hwif: template
 382  *
 383  *      Restore hwif to a previous state by copying most settings
 384  *      from the template.
 385  */
 386
 387 static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
 388 {
 389         hwif->hwgroup                   = tmp_hwif->hwgroup;
 390
 391         hwif->gendev.parent             = tmp_hwif->gendev.parent;
 392
 393         hwif->proc                      = tmp_hwif->proc;
 394
 395         hwif->major                     = tmp_hwif->major;
 396         hwif->straight8                 = tmp_hwif->straight8;
 397         hwif->bus_state                 = tmp_hwif->bus_state;
 398
 399         hwif->host_flags                = tmp_hwif->host_flags;
 400
 401         hwif->pio_mask                  = tmp_hwif->pio_mask;
 402
 403         hwif->ultra_mask                = tmp_hwif->ultra_mask;
 404         hwif->mwdma_mask                = tmp_hwif->mwdma_mask;
 405         hwif->swdma_mask                = tmp_hwif->swdma_mask;
 406
 407         hwif->cbl                       = tmp_hwif->cbl;
 408
 409         hwif->chipset                   = tmp_hwif->chipset;
 410         hwif->hold                      = tmp_hwif->hold;
 411
 412 #ifdef CONFIG_BLK_DEV_IDEPCI
 413         hwif->pci_dev                   = tmp_hwif->pci_dev;
 414         hwif->cds                       = tmp_hwif->cds;
 415 #endif
 416
 417         hwif->fixup                     = tmp_hwif->fixup;
 418
 419         hwif->set_pio_mode              = tmp_hwif->set_pio_mode;
 420         hwif->set_dma_mode              = tmp_hwif->set_dma_mode;
 421         hwif->mdma_filter               = tmp_hwif->mdma_filter;
 422         hwif->udma_filter               = tmp_hwif->udma_filter;
 423         hwif->selectproc                = tmp_hwif->selectproc;
 424         hwif->reset_poll                = tmp_hwif->reset_poll;
 425         hwif->pre_reset                 = tmp_hwif->pre_reset;
 426         hwif->resetproc                 = tmp_hwif->resetproc;
 427         hwif->maskproc                  = tmp_hwif->maskproc;
 428         hwif->quirkproc                 = tmp_hwif->quirkproc;
 429         hwif->busproc                   = tmp_hwif->busproc;
 430
 431         hwif->ata_input_data            = tmp_hwif->ata_input_data;
 432         hwif->ata_output_data           = tmp_hwif->ata_output_data;
 433         hwif->atapi_input_bytes         = tmp_hwif->atapi_input_bytes;
 434         hwif->atapi_output_bytes        = tmp_hwif->atapi_output_bytes;
 435
 436         hwif->dma_host_set              = tmp_hwif->dma_host_set;
 437         hwif->dma_setup                 = tmp_hwif->dma_setup;
 438         hwif->dma_exec_cmd              = tmp_hwif->dma_exec_cmd;
 439         hwif->dma_start                 = tmp_hwif->dma_start;
 440         hwif->ide_dma_end               = tmp_hwif->ide_dma_end;
 441         hwif->ide_dma_test_irq          = tmp_hwif->ide_dma_test_irq;
 442         hwif->ide_dma_clear_irq         = tmp_hwif->ide_dma_clear_irq;
 443         hwif->dma_lost_irq              = tmp_hwif->dma_lost_irq;
 444         hwif->dma_timeout               = tmp_hwif->dma_timeout;
 445
 446         hwif->OUTB                      = tmp_hwif->OUTB;
 447         hwif->OUTBSYNC                  = tmp_hwif->OUTBSYNC;
 448         hwif->OUTW                      = tmp_hwif->OUTW;
 449         hwif->OUTSW                     = tmp_hwif->OUTSW;
 450         hwif->OUTSL                     = tmp_hwif->OUTSL;
 451
 452         hwif->INB                       = tmp_hwif->INB;
 453         hwif->INW                       = tmp_hwif->INW;
 454         hwif->INSW                      = tmp_hwif->INSW;
 455         hwif->INSL                      = tmp_hwif->INSL;
 456
 457         hwif->sg_max_nents              = tmp_hwif->sg_max_nents;
 458
 459         hwif->mmio                      = tmp_hwif->mmio;
 460         hwif->rqsize                    = tmp_hwif->rqsize;
 461
 462 #ifndef CONFIG_BLK_DEV_IDECS
 463         hwif->irq                       = tmp_hwif->irq;
 464 #endif
 465
 466         hwif->dma_base                  = tmp_hwif->dma_base;
 467         hwif->dma_command               = tmp_hwif->dma_command;
 468         hwif->dma_vendor1               = tmp_hwif->dma_vendor1;
 469         hwif->dma_status                = tmp_hwif->dma_status;
 470         hwif->dma_vendor3               = tmp_hwif->dma_vendor3;
 471         hwif->dma_prdtable              = tmp_hwif->dma_prdtable;
 472
 473         hwif->config_data               = tmp_hwif->config_data;
 474         hwif->select_data               = tmp_hwif->select_data;
 475         hwif->extra_base                = tmp_hwif->extra_base;
 476         hwif->extra_ports               = tmp_hwif->extra_ports;
 477
 478         hwif->hwif_data                 = tmp_hwif->hwif_data;
 479 }
 480
 481 /**
 482  *      ide_unregister          -       free an IDE interface
 483  *      @index: index of interface (will change soon to a pointer)
 484  *
 485  *      Perform the final unregister of an IDE interface. At the moment
 486  *      we don't refcount interfaces so this will also get split up.
 487  *
 488  *      Locking:
 489  *      The caller must not hold the IDE locks
 490  *      The drive present/vanishing is not yet properly locked
 491  *      Take care with the callbacks. These have been split to avoid
 492  *      deadlocking the IDE layer. The shutdown callback is called
 493  *      before we take the lock and free resources. It is up to the
 494  *      caller to be sure there is no pending I/O here, and that
 495  *      the interface will not be reopened (present/vanishing locking
 496  *      isn't yet done BTW). After we commit to the final kill we
 497  *      call the cleanup callback with the ide locks held.
 498  *
 499  *      Unregister restores the hwif structures to the default state.
 500  *      This is raving bonkers.
 501  */
 502
 503 void ide_unregister(unsigned int index)
 504 {
 505         ide_drive_t *drive;
 506         ide_hwif_t *hwif, *g;
 507         static ide_hwif_t tmp_hwif; /* protected by ide_cfg_mtx */
 508         ide_hwgroup_t *hwgroup;
 509         int irq_count = 0, unit;
 510
 511         BUG_ON(index >= MAX_HWIFS);
 512
 513         BUG_ON(in_interrupt());
 514         BUG_ON(irqs_disabled());
 515         mutex_lock(&ide_cfg_mtx);
 516         spin_lock_irq(&ide_lock);
 517         hwif = &ide_hwifs[index];
 518         if (!hwif->present)
 519                 goto abort;
 520         for (unit = 0; unit < MAX_DRIVES; ++unit) {
 521                 drive = &hwif->drives[unit];
 522                 if (!drive->present)
 523                         continue;
 524                 spin_unlock_irq(&ide_lock);
 525                 device_unregister(&drive->gendev);
 526                 wait_for_completion(&drive->gendev_rel_comp);
 527                 spin_lock_irq(&ide_lock);
 528         }
 529         hwif->present = 0;
 530
 531         spin_unlock_irq(&ide_lock);
 532
 533         ide_proc_unregister_port(hwif);
 534
 535         hwgroup = hwif->hwgroup;
 536         /*
 537          * free the irq if we were the only hwif using it
 538          */
 539         g = hwgroup->hwif;
 540         do {
 541                 if (g->irq == hwif->irq)
 542                         ++irq_count;
 543                 g = g->next;
 544         } while (g != hwgroup->hwif);
 545         if (irq_count == 1)
 546                 free_irq(hwif->irq, hwgroup);
 547
 548         spin_lock_irq(&ide_lock);
 549         /*
 550          * Note that we only release the standard ports,
 551          * and do not even try to handle any extra ports
 552          * allocated for weird IDE interface chipsets.
 553          */
 554         ide_hwif_release_regions(hwif);
 555
 556         /*
 557          * Remove us from the hwgroup, and free
 558          * the hwgroup if we were the only member
 559          */
 560         if (hwif->next == hwif) {
 561                 BUG_ON(hwgroup->hwif != hwif);
 562                 kfree(hwgroup);
 563         } else {
 564                 /* There is another interface in hwgroup.
 565                  * Unlink us, and set hwgroup->drive and ->hwif to
 566                  * something sane.
 567                  */
 568                 g = hwgroup->hwif;
 569                 while (g->next != hwif)
 570                         g = g->next;
 571                 g->next = hwif->next;
 572                 if (hwgroup->hwif == hwif) {
 573                         /* Chose a random hwif for hwgroup->hwif.
 574                          * It's guaranteed that there are no drives
 575                          * left in the hwgroup.
 576                          */
 577                         BUG_ON(hwgroup->drive != NULL);
 578                         hwgroup->hwif = g;
 579                 }
 580                 BUG_ON(hwgroup->hwif == hwif);
 581         }
 582
 583         /* More messed up locking ... */
 584         spin_unlock_irq(&ide_lock);
 585         device_unregister(&hwif->gendev);
 586         wait_for_completion(&hwif->gendev_rel_comp);
 587
 588         /*
 589          * Remove us from the kernel's knowledge
 590          */
 591         blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
 592         kfree(hwif->sg_table);
 593         unregister_blkdev(hwif->major, hwif->name);
 594         spin_lock_irq(&ide_lock);
 595
 596         if (hwif->dma_base) {
 597                 (void) ide_release_dma(hwif);
 598
 599                 hwif->dma_base = 0;
 600                 hwif->dma_command = 0;
 601                 hwif->dma_vendor1 = 0;
 602                 hwif->dma_status = 0;
 603                 hwif->dma_vendor3 = 0;
 604                 hwif->dma_prdtable = 0;
 605
 606                 hwif->extra_base  = 0;
 607                 hwif->extra_ports = 0;
 608         }
 609
 610         /* copy original settings */
 611         tmp_hwif = *hwif;
 612
 613         /* restore hwif data to pristine status */
 614         init_hwif_data(hwif, index);
 615         init_hwif_default(hwif, index);
 616
 617         ide_hwif_restore(hwif, &tmp_hwif);
 618
 619 abort:
 620         spin_unlock_irq(&ide_lock);
 621         mutex_unlock(&ide_cfg_mtx);
 622 }
 623
 624 EXPORT_SYMBOL(ide_unregister);
 625
 626
 627 /**
 628  *      ide_setup_ports         -       set up IDE interface ports
 629  *      @hw: register descriptions
 630  *      @base: base register
 631  *      @offsets: table of register offsets
 632  *      @ctrl: control register
 633  *      @ack_irq: IRQ ack
 634  *      @irq: interrupt lie
 635  *
 636  *      Setup hw_regs_t structure described by parameters.  You
 637  *      may set up the hw structure yourself OR use this routine to
 638  *      do it for you. This is basically a helper
 639  *
 640  */
 641
 642 void ide_setup_ports (  hw_regs_t *hw,
 643                         unsigned long base, int *offsets,
 644                         unsigned long ctrl, unsigned long intr,
 645                         ide_ack_intr_t *ack_intr,
 646 /*
 647  *                      ide_io_ops_t *iops,
 648  */
 649                         int irq)
 650 {
 651         int i;
 652
 653         memset(hw, 0, sizeof(hw_regs_t));
 654         for (i = 0; i < IDE_NR_PORTS; i++) {
 655                 if (offsets[i] == -1) {
 656                         switch(i) {
 657                                 case IDE_CONTROL_OFFSET:
 658                                         hw->io_ports[i] = ctrl;
 659                                         break;
 660 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
 661                                 case IDE_IRQ_OFFSET:
 662                                         hw->io_ports[i] = intr;
 663                                         break;
 664 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
 665                                 default:
 666                                         hw->io_ports[i] = 0;
 667                                         break;
 668                         }
 669                 } else {
 670                         hw->io_ports[i] = base + offsets[i];
 671                 }
 672         }
 673         hw->irq = irq;
 674         hw->ack_intr = ack_intr;
 675 /*
 676  *      hw->iops = iops;
 677  */
 678 }
 679
 680 /**
 681  *      ide_register_hw         -       register IDE interface
 682  *      @hw: hardware registers
 683  *      @fixup: fixup function
 684  *      @initializing: set while initializing built-in drivers
 685  *      @hwifp: pointer to returned hwif
 686  *
 687  *      Register an IDE interface, specifying exactly the registers etc.
 688  *      Set init=1 iff calling before probes have taken place.
 689  *
 690  *      Returns -1 on error.
 691  */
 692
 693 int ide_register_hw(hw_regs_t *hw, void (*fixup)(ide_hwif_t *),
 694                     int initializing, ide_hwif_t **hwifp)
 695 {
 696         int index, retry = 1;
 697         ide_hwif_t *hwif;
 698
 699         do {
 700                 for (index = 0; index < MAX_HWIFS; ++index) {
 701                         hwif = &ide_hwifs[index];
 702                         if (hwif->io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
 703                                 goto found;
 704                 }
 705                 for (index = 0; index < MAX_HWIFS; ++index) {
 706                         hwif = &ide_hwifs[index];
 707                         if (hwif->hold)
 708                                 continue;
 709                         if ((!hwif->present && !hwif->mate && !initializing) ||
 710                             (!hwif->io_ports[IDE_DATA_OFFSET] && initializing))
 711                                 goto found;
 712                 }
 713                 for (index = 0; index < MAX_HWIFS; index++)
 714                         ide_unregister(index);
 715         } while (retry--);
 716         return -1;
 717 found:
 718         if (hwif->present)
 719                 ide_unregister(index);
 720         else if (!hwif->hold) {
 721                 init_hwif_data(hwif, index);
 722                 init_hwif_default(hwif, index);
 723         }
 724         if (hwif->present)
 725                 return -1;
 726         memcpy(hwif->io_ports, hw->io_ports, sizeof(hwif->io_ports));
 727         hwif->irq = hw->irq;
 728         hwif->noprobe = 0;
 729         hwif->fixup = fixup;
 730         hwif->chipset = hw->chipset;
 731         hwif->gendev.parent = hw->dev;
 732         hwif->ack_intr = hw->ack_intr;
 733
 734         if (initializing == 0) {
 735                 u8 idx[4] = { index, 0xff, 0xff, 0xff };
 736
 737                 ide_device_add(idx);
 738         }
 739
 740         if (hwifp)
 741                 *hwifp = hwif;
 742
 743         return (initializing || hwif->present) ? index : -1;
 744 }
 745
 746 EXPORT_SYMBOL(ide_register_hw);
 747
 748 /*
 749  *      Locks for IDE setting functionality
 750  */
 751
 752 DEFINE_MUTEX(ide_setting_mtx);
 753
 754 EXPORT_SYMBOL_GPL(ide_setting_mtx);
 755
 756 /**
 757  *      ide_spin_wait_hwgroup   -       wait for group
 758  *      @drive: drive in the group
 759  *
 760  *      Wait for an IDE device group to go non busy and then return
 761  *      holding the ide_lock which guards the hwgroup->busy status
 762  *      and right to use it.
 763  */
 764
 765 int ide_spin_wait_hwgroup (ide_drive_t *drive)
 766 {
 767         ide_hwgroup_t *hwgroup = HWGROUP(drive);
 768         unsigned long timeout = jiffies + (3 * HZ);
 769
 770         spin_lock_irq(&ide_lock);
 771
 772         while (hwgroup->busy) {
 773                 unsigned long lflags;
 774                 spin_unlock_irq(&ide_lock);
 775                 local_irq_set(lflags);
 776                 if (time_after(jiffies, timeout)) {
 777                         local_irq_restore(lflags);
 778                         printk(KERN_ERR "%s: channel busy\n", drive->name);
 779                         return -EBUSY;
 780                 }
 781                 local_irq_restore(lflags);
 782                 spin_lock_irq(&ide_lock);
 783         }
 784         return 0;
 785 }
 786
 787 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
 788
 789 int set_io_32bit(ide_drive_t *drive, int arg)
 790 {
 791         if (drive->no_io_32bit)
 792                 return -EPERM;
 793
 794         if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
 795                 return -EINVAL;
 796
 797         if (ide_spin_wait_hwgroup(drive))
 798                 return -EBUSY;
 799
 800         drive->io_32bit = arg;
 801 #ifdef CONFIG_BLK_DEV_DTC2278
 802         if (HWIF(drive)->chipset == ide_dtc2278)
 803                 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
 804 #endif /* CONFIG_BLK_DEV_DTC2278 */
 805
 806         spin_unlock_irq(&ide_lock);
 807
 808         return 0;
 809 }
 810
 811 static int set_ksettings(ide_drive_t *drive, int arg)
 812 {
 813         if (arg < 0 || arg > 1)
 814                 return -EINVAL;
 815
 816         if (ide_spin_wait_hwgroup(drive))
 817                 return -EBUSY;
 818         drive->keep_settings = arg;
 819         spin_unlock_irq(&ide_lock);
 820
 821         return 0;
 822 }
 823
 824 int set_using_dma(ide_drive_t *drive, int arg)
 825 {
 826 #ifdef CONFIG_BLK_DEV_IDEDMA
 827         ide_hwif_t *hwif = drive->hwif;
 828         int err = -EPERM;
 829
 830         if (arg < 0 || arg > 1)
 831                 return -EINVAL;
 832
 833         if (!drive->id || !(drive->id->capability & 1))
 834                 goto out;
 835
 836         if (hwif->dma_host_set == NULL)
 837                 goto out;
 838
 839         err = -EBUSY;
 840         if (ide_spin_wait_hwgroup(drive))
 841                 goto out;
 842         /*
 843          * set ->busy flag, unlock and let it ride
 844          */
 845         hwif->hwgroup->busy = 1;
 846         spin_unlock_irq(&ide_lock);
 847
 848         err = 0;
 849
 850         if (arg) {
 851                 if (ide_set_dma(drive))
 852                         err = -EIO;
 853         } else
 854                 ide_dma_off(drive);
 855
 856         /*
 857          * lock, clear ->busy flag and unlock before leaving
 858          */
 859         spin_lock_irq(&ide_lock);
 860         hwif->hwgroup->busy = 0;
 861         spin_unlock_irq(&ide_lock);
 862 out:
 863         return err;
 864 #else
 865         if (arg < 0 || arg > 1)
 866                 return -EINVAL;
 867
 868         return -EPERM;
 869 #endif
 870 }
 871
 872 int set_pio_mode(ide_drive_t *drive, int arg)
 873 {
 874         struct request rq;
 875
 876         if (arg < 0 || arg > 255)
 877                 return -EINVAL;
 878
 879         if (drive->hwif->set_pio_mode == NULL)
 880                 return -ENOSYS;
 881
 882         if (drive->special.b.set_tune)
 883                 return -EBUSY;
 884         ide_init_drive_cmd(&rq);
 885         drive->tune_req = (u8) arg;
 886         drive->special.b.set_tune = 1;
 887         (void) ide_do_drive_cmd(drive, &rq, ide_wait);
 888         return 0;
 889 }
 890
 891 static int set_unmaskirq(ide_drive_t *drive, int arg)
 892 {
 893         if (drive->no_unmask)
 894                 return -EPERM;
 895
 896         if (arg < 0 || arg > 1)
 897                 return -EINVAL;
 898
 899         if (ide_spin_wait_hwgroup(drive))
 900                 return -EBUSY;
 901         drive->unmask = arg;
 902         spin_unlock_irq(&ide_lock);
 903
 904         return 0;
 905 }
 906
 907 /**
 908  *      system_bus_clock        -       clock guess
 909  *
 910  *      External version of the bus clock guess used by very old IDE drivers
 911  *      for things like VLB timings. Should not be used.
 912  */
 913
 914 int system_bus_clock (void)
 915 {
 916         return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
 917 }
 918
 919 EXPORT_SYMBOL(system_bus_clock);
 920
 921 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
 922 {
 923         ide_drive_t *drive = dev->driver_data;
 924         ide_hwif_t *hwif = HWIF(drive);
 925         struct request rq;
 926         struct request_pm_state rqpm;
 927         ide_task_t args;
 928         int ret;
 929
 930         /* Call ACPI _GTM only once */
 931         if (!(drive->dn % 2))
 932                 ide_acpi_get_timing(hwif);
 933
 934         memset(&rq, 0, sizeof(rq));
 935         memset(&rqpm, 0, sizeof(rqpm));
 936         memset(&args, 0, sizeof(args));
 937         rq.cmd_type = REQ_TYPE_PM_SUSPEND;
 938         rq.special = &args;
 939         rq.data = &rqpm;
 940         rqpm.pm_step = ide_pm_state_start_suspend;
 941         if (mesg.event == PM_EVENT_PRETHAW)
 942                 mesg.event = PM_EVENT_FREEZE;
 943         rqpm.pm_state = mesg.event;
 944
 945         ret = ide_do_drive_cmd(drive, &rq, ide_wait);
 946         /* only call ACPI _PS3 after both drivers are suspended */
 947         if (!ret && (((drive->dn % 2) && hwif->drives[0].present
 948                  && hwif->drives[1].present)
 949                  || !hwif->drives[0].present
 950                  || !hwif->drives[1].present))
 951                 ide_acpi_set_state(hwif, 0);
 952         return ret;
 953 }
 954
 955 static int generic_ide_resume(struct device *dev)
 956 {
 957         ide_drive_t *drive = dev->driver_data;
 958         ide_hwif_t *hwif = HWIF(drive);
 959         struct request rq;
 960         struct request_pm_state rqpm;
 961         ide_task_t args;
 962         int err;
 963
 964         /* Call ACPI _STM only once */
 965         if (!(drive->dn % 2)) {
 966                 ide_acpi_set_state(hwif, 1);
 967                 ide_acpi_push_timing(hwif);
 968         }
 969
 970         ide_acpi_exec_tfs(drive);
 971
 972         memset(&rq, 0, sizeof(rq));
 973         memset(&rqpm, 0, sizeof(rqpm));
 974         memset(&args, 0, sizeof(args));
 975         rq.cmd_type = REQ_TYPE_PM_RESUME;
 976         rq.special = &args;
 977         rq.data = &rqpm;
 978         rqpm.pm_step = ide_pm_state_start_resume;
 979         rqpm.pm_state = PM_EVENT_ON;
 980
 981         err = ide_do_drive_cmd(drive, &rq, ide_head_wait);
 982
 983         if (err == 0 && dev->driver) {
 984                 ide_driver_t *drv = to_ide_driver(dev->driver);
 985
 986                 if (drv->resume)
 987                         drv->resume(drive);
 988         }
 989
 990         return err;
 991 }
 992
 993 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
 994                         unsigned int cmd, unsigned long arg)
 995 {
 996         unsigned long flags;
 997         ide_driver_t *drv;
 998         void __user *p = (void __user *)arg;
 999         int err = 0, (*setfunc)(ide_drive_t *, int);
1000         u8 *val;
1001
1002         switch (cmd) {
1003         case HDIO_GET_32BIT:        val = &drive->io_32bit;      goto read_val;
1004         case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
1005         case HDIO_GET_UNMASKINTR:   val = &drive->unmask;        goto read_val;
1006         case HDIO_GET_DMA:          val = &drive->using_dma;     goto read_val;
1007         case HDIO_SET_32BIT:        setfunc = set_io_32bit;      goto set_val;
1008         case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings;     goto set_val;
1009         case HDIO_SET_PIO_MODE:     setfunc = set_pio_mode;      goto set_val;
1010         case HDIO_SET_UNMASKINTR:   setfunc = set_unmaskirq;     goto set_val;
1011         case HDIO_SET_DMA:          setfunc = set_using_dma;     goto set_val;
1012         }
1013
1014         switch (cmd) {
1015                 case HDIO_OBSOLETE_IDENTITY:
1016                 case HDIO_GET_IDENTITY:
1017                         if (bdev != bdev->bd_contains)
1018                                 return -EINVAL;
1019                         if (drive->id_read == 0)
1020                                 return -ENOMSG;
1021                         if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1022                                 return -EFAULT;
1023                         return 0;
1024
1025                 case HDIO_GET_NICE:
1026                         return put_user(drive->dsc_overlap      <<      IDE_NICE_DSC_OVERLAP    |
1027                                         drive->atapi_overlap    <<      IDE_NICE_ATAPI_OVERLAP  |
1028                                         drive->nice0            <<      IDE_NICE_0              |
1029                                         drive->nice1            <<      IDE_NICE_1              |
1030                                         drive->nice2            <<      IDE_NICE_2,
1031                                         (long __user *) arg);
1032
1033 #ifdef CONFIG_IDE_TASK_IOCTL
1034                 case HDIO_DRIVE_TASKFILE:
1035                         if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1036                                 return -EACCES;
1037                         switch(drive->media) {
1038                                 case ide_disk:
1039                                         return ide_taskfile_ioctl(drive, cmd, arg);
1040                                 default:
1041                                         return -ENOMSG;
1042                         }
1043 #endif /* CONFIG_IDE_TASK_IOCTL */
1044
1045                 case HDIO_DRIVE_CMD:
1046                         if (!capable(CAP_SYS_RAWIO))
1047                                 return -EACCES;
1048                         return ide_cmd_ioctl(drive, cmd, arg);
1049
1050                 case HDIO_DRIVE_TASK:
1051                         if (!capable(CAP_SYS_RAWIO))
1052                                 return -EACCES;
1053                         return ide_task_ioctl(drive, cmd, arg);
1054
1055                 case HDIO_SCAN_HWIF:
1056                 {
1057                         hw_regs_t hw;
1058                         int args[3];
1059                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1060                         if (copy_from_user(args, p, 3 * sizeof(int)))
1061                                 return -EFAULT;
1062                         memset(&hw, 0, sizeof(hw));
1063                         ide_init_hwif_ports(&hw, (unsigned long) args[0],
1064                                             (unsigned long) args[1], NULL);
1065                         hw.irq = args[2];
1066                         if (ide_register_hw(&hw, NULL, 0, NULL) == -1)
1067                                 return -EIO;
1068                         return 0;
1069                 }
1070                 case HDIO_UNREGISTER_HWIF:
1071                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1072                         /* (arg > MAX_HWIFS) checked in function */
1073                         ide_unregister(arg);
1074                         return 0;
1075                 case HDIO_SET_NICE:
1076                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1077                         if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1078                                 return -EPERM;
1079                         drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1080                         drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1081                         if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1082                                 drive->dsc_overlap = 0;
1083                                 return -EPERM;
1084                         }
1085                         drive->nice1 = (arg >> IDE_NICE_1) & 1;
1086                         return 0;
1087                 case HDIO_DRIVE_RESET:
1088                 {
1089                         unsigned long flags;
1090                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1091
1092                         /*
1093                          *      Abort the current command on the
1094                          *      group if there is one, taking
1095                          *      care not to allow anything else
1096                          *      to be queued and to die on the
1097                          *      spot if we miss one somehow
1098                          */
1099
1100                         spin_lock_irqsave(&ide_lock, flags);
1101
1102                         if (HWGROUP(drive)->resetting) {
1103                                 spin_unlock_irqrestore(&ide_lock, flags);
1104                                 return -EBUSY;
1105                         }
1106
1107                         ide_abort(drive, "drive reset");
1108
1109                         BUG_ON(HWGROUP(drive)->handler);
1110
1111                         /* Ensure nothing gets queued after we
1112                            drop the lock. Reset will clear the busy */
1113
1114                         HWGROUP(drive)->busy = 1;
1115                         spin_unlock_irqrestore(&ide_lock, flags);
1116                         (void) ide_do_reset(drive);
1117
1118                         return 0;
1119                 }
1120
1121                 case HDIO_GET_BUSSTATE:
1122                         if (!capable(CAP_SYS_ADMIN))
1123                                 return -EACCES;
1124                         if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1125                                 return -EFAULT;
1126                         return 0;
1127
1128                 case HDIO_SET_BUSSTATE:
1129                         if (!capable(CAP_SYS_ADMIN))
1130                                 return -EACCES;
1131                         if (HWIF(drive)->busproc)
1132                                 return HWIF(drive)->busproc(drive, (int)arg);
1133                         return -EOPNOTSUPP;
1134                 default:
1135                         return -EINVAL;
1136         }
1137
1138 read_val:
1139         mutex_lock(&ide_setting_mtx);
1140         spin_lock_irqsave(&ide_lock, flags);
1141         err = *val;
1142         spin_unlock_irqrestore(&ide_lock, flags);
1143         mutex_unlock(&ide_setting_mtx);
1144         return err >= 0 ? put_user(err, (long __user *)arg) : err;
1145
1146 set_val:
1147         if (bdev != bdev->bd_contains)
1148                 err = -EINVAL;
1149         else {
1150                 if (!capable(CAP_SYS_ADMIN))
1151                         err = -EACCES;
1152                 else {
1153                         mutex_lock(&ide_setting_mtx);
1154                         err = setfunc(drive, arg);
1155                         mutex_unlock(&ide_setting_mtx);
1156                 }
1157         }
1158         return err;
1159 }
1160
1161 EXPORT_SYMBOL(generic_ide_ioctl);
1162
1163 /*
1164  * stridx() returns the offset of c within s,
1165  * or -1 if c is '\0' or not found within s.
1166  */
1167 static int __init stridx (const char *s, char c)
1168 {
1169         char *i = strchr(s, c);
1170         return (i && c) ? i - s : -1;
1171 }
1172
1173 /*
1174  * match_parm() does parsing for ide_setup():
1175  *
1176  * 1. the first char of s must be '='.
1177  * 2. if the remainder matches one of the supplied keywords,
1178  *     the index (1 based) of the keyword is negated and returned.
1179  * 3. if the remainder is a series of no more than max_vals numbers
1180  *     separated by commas, the numbers are saved in vals[] and a
1181  *     count of how many were saved is returned.  Base10 is assumed,
1182  *     and base16 is allowed when prefixed with "0x".
1183  * 4. otherwise, zero is returned.
1184  */
1185 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1186 {
1187         static const char *decimal = "0123456789";
1188         static const char *hex = "0123456789abcdef";
1189         int i, n;
1190
1191         if (*s++ == '=') {
1192                 /*
1193                  * Try matching against the supplied keywords,
1194                  * and return -(index+1) if we match one
1195                  */
1196                 if (keywords != NULL) {
1197                         for (i = 0; *keywords != NULL; ++i) {
1198                                 if (!strcmp(s, *keywords++))
1199                                         return -(i+1);
1200                         }
1201                 }
1202                 /*
1203                  * Look for a series of no more than "max_vals"
1204                  * numeric values separated by commas, in base10,
1205                  * or base16 when prefixed with "0x".
1206                  * Return a count of how many were found.
1207                  */
1208                 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1209                         vals[n] = i;
1210                         while ((i = stridx(decimal, *++s)) >= 0)
1211                                 vals[n] = (vals[n] * 10) + i;
1212                         if (*s == 'x' && !vals[n]) {
1213                                 while ((i = stridx(hex, *++s)) >= 0)
1214                                         vals[n] = (vals[n] * 0x10) + i;
1215                         }
1216                         if (++n == max_vals)
1217                                 break;
1218                         if (*s == ',' || *s == ';')
1219                                 ++s;
1220                 }
1221                 if (!*s)
1222                         return n;
1223         }
1224         return 0;       /* zero = nothing matched */
1225 }
1226
1227 #ifdef CONFIG_BLK_DEV_ALI14XX
1228 extern int probe_ali14xx;
1229 extern int ali14xx_init(void);
1230 #endif
1231 #ifdef CONFIG_BLK_DEV_UMC8672
1232 extern int probe_umc8672;
1233 extern int umc8672_init(void);
1234 #endif
1235 #ifdef CONFIG_BLK_DEV_DTC2278
1236 extern int probe_dtc2278;
1237 extern int dtc2278_init(void);
1238 #endif
1239 #ifdef CONFIG_BLK_DEV_HT6560B
1240 extern int probe_ht6560b;
1241 extern int ht6560b_init(void);
1242 #endif
1243 #ifdef CONFIG_BLK_DEV_QD65XX
1244 extern int probe_qd65xx;
1245 extern int qd65xx_init(void);
1246 #endif
1247
1248 static int __initdata is_chipset_set[MAX_HWIFS];
1249
1250 /*
1251  * ide_setup() gets called VERY EARLY during initialization,
1252  * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1253  *
1254  * Remember to update Documentation/ide.txt if you change something here.
1255  */
1256 static int __init ide_setup(char *s)
1257 {
1258         int i, vals[3];
1259         ide_hwif_t *hwif;
1260         ide_drive_t *drive;
1261         unsigned int hw, unit;
1262         const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1263         const char max_hwif  = '0' + (MAX_HWIFS - 1);
1264
1265
1266         if (strncmp(s,"hd",2) == 0 && s[2] == '=')      /* hd= is for hd.c   */
1267                 return 0;                               /* driver and not us */
1268
1269         if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1270                 return 0;
1271
1272         printk(KERN_INFO "ide_setup: %s", s);
1273         init_ide_data ();
1274
1275 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1276         if (!strcmp(s, "ide=doubler")) {
1277                 extern int ide_doubler;
1278
1279                 printk(" : Enabled support for IDE doublers\n");
1280                 ide_doubler = 1;
1281                 return 1;
1282         }
1283 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1284
1285         if (!strcmp(s, "ide=nodma")) {
1286                 printk(" : Prevented DMA\n");
1287                 noautodma = 1;
1288                 goto obsolete_option;
1289         }
1290
1291 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1292         if (!strcmp(s, "ide=reverse")) {
1293                 ide_scan_direction = 1;
1294                 printk(" : Enabled support for IDE inverse scan order.\n");
1295                 return 1;
1296         }
1297 #endif
1298
1299 #ifdef CONFIG_BLK_DEV_IDEACPI
1300         if (!strcmp(s, "ide=noacpi")) {
1301                 //printk(" : Disable IDE ACPI support.\n");
1302                 ide_noacpi = 1;
1303                 return 1;
1304         }
1305         if (!strcmp(s, "ide=acpigtf")) {
1306                 //printk(" : Enable IDE ACPI _GTF support.\n");
1307                 ide_noacpitfs = 0;
1308                 return 1;
1309         }
1310         if (!strcmp(s, "ide=acpionboot")) {
1311                 //printk(" : Call IDE ACPI methods on boot.\n");
1312                 ide_noacpionboot = 0;
1313                 return 1;
1314         }
1315 #endif /* CONFIG_BLK_DEV_IDEACPI */
1316
1317         /*
1318          * Look for drive options:  "hdx="
1319          */
1320         if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1321                 const char *hd_words[] = {
1322                         "none", "noprobe", "nowerr", "cdrom", "nodma",
1323                         "autotune", "noautotune", "minus8", "swapdata", "bswap",
1324                         "noflush", "remap", "remap63", "scsi", NULL };
1325                 unit = s[2] - 'a';
1326                 hw   = unit / MAX_DRIVES;
1327                 unit = unit % MAX_DRIVES;
1328                 hwif = &ide_hwifs[hw];
1329                 drive = &hwif->drives[unit];
1330                 if (strncmp(s + 4, "ide-", 4) == 0) {
1331                         strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1332                         goto done;
1333                 }
1334                 switch (match_parm(&s[3], hd_words, vals, 3)) {
1335                         case -1: /* "none" */
1336                         case -2: /* "noprobe" */
1337                                 drive->noprobe = 1;
1338                                 goto done;
1339                         case -3: /* "nowerr" */
1340                                 drive->bad_wstat = BAD_R_STAT;
1341                                 hwif->noprobe = 0;
1342                                 goto done;
1343                         case -4: /* "cdrom" */
1344                                 drive->present = 1;
1345                                 drive->media = ide_cdrom;
1346                                 /* an ATAPI device ignores DRDY */
1347                                 drive->ready_stat = 0;
1348                                 hwif->noprobe = 0;
1349                                 goto done;
1350                         case -5: /* nodma */
1351                                 drive->nodma = 1;
1352                                 goto done;
1353                         case -6: /* "autotune" */
1354                                 drive->autotune = IDE_TUNE_AUTO;
1355                                 goto obsolete_option;
1356                         case -7: /* "noautotune" */
1357                                 drive->autotune = IDE_TUNE_NOAUTO;
1358                                 goto obsolete_option;
1359                         case -9: /* "swapdata" */
1360                         case -10: /* "bswap" */
1361                                 drive->bswap = 1;
1362                                 goto done;
1363                         case -11: /* noflush */
1364                                 drive->noflush = 1;
1365                                 goto done;
1366                         case -12: /* "remap" */
1367                                 drive->remap_0_to_1 = 1;
1368                                 goto done;
1369                         case -13: /* "remap63" */
1370                                 drive->sect0 = 63;
1371                                 goto done;
1372                         case -14: /* "scsi" */
1373                                 drive->scsi = 1;
1374                                 goto done;
1375                         case 3: /* cyl,head,sect */
1376                                 drive->media    = ide_disk;
1377                                 drive->ready_stat = READY_STAT;
1378                                 drive->cyl      = drive->bios_cyl  = vals[0];
1379                                 drive->head     = drive->bios_head = vals[1];
1380                                 drive->sect     = drive->bios_sect = vals[2];
1381                                 drive->present  = 1;
1382                                 drive->forced_geom = 1;
1383                                 hwif->noprobe = 0;
1384                                 goto done;
1385                         default:
1386                                 goto bad_option;
1387                 }
1388         }
1389
1390         if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1391                 goto bad_option;
1392         /*
1393          * Look for bus speed option:  "idebus="
1394          */
1395         if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1396                 if (match_parm(&s[6], NULL, vals, 1) != 1)
1397                         goto bad_option;
1398                 if (vals[0] >= 20 && vals[0] <= 66) {
1399                         idebus_parameter = vals[0];
1400                 } else
1401                         printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1402                 goto done;
1403         }
1404         /*
1405          * Look for interface options:  "idex="
1406          */
1407         if (s[3] >= '0' && s[3] <= max_hwif) {
1408                 /*
1409                  * Be VERY CAREFUL changing this: note hardcoded indexes below
1410                  * (-8, -9, -10) are reserved to ease the hardcoding.
1411                  */
1412                 static const char *ide_words[] = {
1413                         "noprobe", "serialize", "minus3", "minus4",
1414                         "reset", "minus6", "ata66", "minus8", "minus9",
1415                         "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1416                         "dtc2278", "umc8672", "ali14xx", NULL };
1417
1418                 hw_regs_t hwregs;
1419
1420                 hw = s[3] - '0';
1421                 hwif = &ide_hwifs[hw];
1422                 i = match_parm(&s[4], ide_words, vals, 3);
1423
1424                 /*
1425                  * Cryptic check to ensure chipset not already set for hwif.
1426                  * Note: we can't depend on hwif->chipset here.
1427                  */
1428                 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1429                         /* chipset already specified */
1430                         if (is_chipset_set[hw])
1431                                 goto bad_option;
1432                         if (i > -18 && i <= -11) {
1433                                 /* these drivers are for "ide0=" only */
1434                                 if (hw != 0)
1435                                         goto bad_hwif;
1436                                 /* chipset already specified for 2nd port */
1437                                 if (is_chipset_set[hw+1])
1438                                         goto bad_option;
1439                         }
1440                         is_chipset_set[hw] = 1;
1441                         printk("\n");
1442                 }
1443
1444                 switch (i) {
1445 #ifdef CONFIG_BLK_DEV_ALI14XX
1446                         case -17: /* "ali14xx" */
1447                                 probe_ali14xx = 1;
1448                                 goto done;
1449 #endif
1450 #ifdef CONFIG_BLK_DEV_UMC8672
1451                         case -16: /* "umc8672" */
1452                                 probe_umc8672 = 1;
1453                                 goto done;
1454 #endif
1455 #ifdef CONFIG_BLK_DEV_DTC2278
1456                         case -15: /* "dtc2278" */
1457                                 probe_dtc2278 = 1;
1458                                 goto done;
1459 #endif
1460 #ifdef CONFIG_BLK_DEV_CMD640
1461                         case -14: /* "cmd640_vlb" */
1462                         {
1463                                 extern int cmd640_vlb; /* flag for cmd640.c */
1464                                 cmd640_vlb = 1;
1465                                 goto done;
1466                         }
1467 #endif
1468 #ifdef CONFIG_BLK_DEV_HT6560B
1469                         case -13: /* "ht6560b" */
1470                                 probe_ht6560b = 1;
1471                                 goto done;
1472 #endif
1473 #ifdef CONFIG_BLK_DEV_QD65XX
1474                         case -12: /* "qd65xx" */
1475                                 probe_qd65xx = 1;
1476                                 goto done;
1477 #endif
1478 #ifdef CONFIG_BLK_DEV_4DRIVES
1479                         case -11: /* "four" drives on one set of ports */
1480                         {
1481                                 ide_hwif_t *mate = &ide_hwifs[hw^1];
1482                                 mate->drives[0].select.all ^= 0x20;
1483                                 mate->drives[1].select.all ^= 0x20;
1484                                 hwif->chipset = mate->chipset = ide_4drives;
1485                                 mate->irq = hwif->irq;
1486                                 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1487                                 hwif->mate = mate;
1488                                 mate->mate = hwif;
1489                                 hwif->serialized = mate->serialized = 1;
1490                                 goto obsolete_option;
1491                         }
1492 #endif /* CONFIG_BLK_DEV_4DRIVES */
1493                         case -10: /* minus10 */
1494                         case -9: /* minus9 */
1495                         case -8: /* minus8 */
1496                         case -6:
1497                         case -4:
1498                         case -3:
1499                                 goto bad_option;
1500                         case -7: /* ata66 */
1501 #ifdef CONFIG_BLK_DEV_IDEPCI
1502                                 /*
1503                                  * Use ATA_CBL_PATA40_SHORT so drive side
1504                                  * cable detection is also overriden.
1505                                  */
1506                                 hwif->cbl = ATA_CBL_PATA40_SHORT;
1507                                 goto obsolete_option;
1508 #else
1509                                 goto bad_hwif;
1510 #endif
1511                         case -5: /* "reset" */
1512                                 hwif->reset = 1;
1513                                 goto obsolete_option;
1514                         case -2: /* "serialize" */
1515                                 hwif->mate = &ide_hwifs[hw^1];
1516                                 hwif->mate->mate = hwif;
1517                                 hwif->serialized = hwif->mate->serialized = 1;
1518                                 goto obsolete_option;
1519
1520                         case -1: /* "noprobe" */
1521                                 hwif->noprobe = 1;
1522                                 goto done;
1523
1524                         case 1: /* base */
1525                                 vals[1] = vals[0] + 0x206; /* default ctl */
1526                         case 2: /* base,ctl */
1527                                 vals[2] = 0;    /* default irq = probe for it */
1528                         case 3: /* base,ctl,irq */
1529                                 memset(&hwregs, 0, sizeof(hwregs));
1530                                 ide_init_hwif_ports(&hwregs, vals[0], vals[1], &hwif->irq);
1531                                 memcpy(hwif->io_ports, hwregs.io_ports, sizeof(hwif->io_ports));
1532                                 hwif->irq      = vals[2];
1533                                 hwif->noprobe  = 0;
1534                                 hwif->chipset  = ide_forced;
1535                                 goto obsolete_option;
1536
1537                         case 0: goto bad_option;
1538                         default:
1539                                 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1540                                 return 1;
1541                 }
1542         }
1543 bad_option:
1544         printk(" -- BAD OPTION\n");
1545         return 1;
1546 obsolete_option:
1547         printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1548         return 1;
1549 bad_hwif:
1550         printk("-- NOT SUPPORTED ON ide%d", hw);
1551 done:
1552         printk("\n");
1553         return 1;
1554 }
1555
1556 extern void __init pnpide_init(void);
1557 extern void __exit pnpide_exit(void);
1558 extern void __init h8300_ide_init(void);
1559
1560 /*
1561  * probe_for_hwifs() finds/initializes "known" IDE interfaces
1562  */
1563 static void __init probe_for_hwifs (void)
1564 {
1565 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1566         ide_scan_pcibus(ide_scan_direction);
1567 #endif
1568
1569 #ifdef CONFIG_ETRAX_IDE
1570         {
1571                 extern void init_e100_ide(void);
1572                 init_e100_ide();
1573         }
1574 #endif /* CONFIG_ETRAX_IDE */
1575 #ifdef CONFIG_BLK_DEV_CMD640
1576         {
1577                 extern void ide_probe_for_cmd640x(void);
1578                 ide_probe_for_cmd640x();
1579         }
1580 #endif /* CONFIG_BLK_DEV_CMD640 */
1581 #ifdef CONFIG_BLK_DEV_IDE_PMAC
1582         {
1583                 extern int pmac_ide_probe(void);
1584                 (void)pmac_ide_probe();
1585         }
1586 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
1587 #ifdef CONFIG_BLK_DEV_GAYLE
1588         {
1589                 extern void gayle_init(void);
1590                 gayle_init();
1591         }
1592 #endif /* CONFIG_BLK_DEV_GAYLE */
1593 #ifdef CONFIG_BLK_DEV_FALCON_IDE
1594         {
1595                 extern void falconide_init(void);
1596                 falconide_init();
1597         }
1598 #endif /* CONFIG_BLK_DEV_FALCON_IDE */
1599 #ifdef CONFIG_BLK_DEV_MAC_IDE
1600         {
1601                 extern void macide_init(void);
1602                 macide_init();
1603         }
1604 #endif /* CONFIG_BLK_DEV_MAC_IDE */
1605 #ifdef CONFIG_BLK_DEV_Q40IDE
1606         {
1607                 extern void q40ide_init(void);
1608                 q40ide_init();
1609         }
1610 #endif /* CONFIG_BLK_DEV_Q40IDE */
1611 #ifdef CONFIG_BLK_DEV_BUDDHA
1612         {
1613                 extern void buddha_init(void);
1614                 buddha_init();
1615         }
1616 #endif /* CONFIG_BLK_DEV_BUDDHA */
1617 #ifdef CONFIG_BLK_DEV_IDEPNP
1618         pnpide_init();
1619 #endif
1620 #ifdef CONFIG_H8300
1621         h8300_ide_init();
1622 #endif
1623 }
1624
1625 /*
1626  * Probe module
1627  */
1628
1629 EXPORT_SYMBOL(ide_lock);
1630
1631 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1632 {
1633         return 1;
1634 }
1635
1636 static char *media_string(ide_drive_t *drive)
1637 {
1638         switch (drive->media) {
1639         case ide_disk:
1640                 return "disk";
1641         case ide_cdrom:
1642                 return "cdrom";
1643         case ide_tape:
1644                 return "tape";
1645         case ide_floppy:
1646                 return "floppy";
1647         case ide_optical:
1648                 return "optical";
1649         default:
1650                 return "UNKNOWN";
1651         }
1652 }
1653
1654 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1655 {
1656         ide_drive_t *drive = to_ide_device(dev);
1657         return sprintf(buf, "%s\n", media_string(drive));
1658 }
1659
1660 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1661 {
1662         ide_drive_t *drive = to_ide_device(dev);
1663         return sprintf(buf, "%s\n", drive->name);
1664 }
1665
1666 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1667 {
1668         ide_drive_t *drive = to_ide_device(dev);
1669         return sprintf(buf, "ide:m-%s\n", media_string(drive));
1670 }
1671
1672 static ssize_t model_show(struct device *dev, struct device_attribute *attr,
1673                           char *buf)
1674 {
1675         ide_drive_t *drive = to_ide_device(dev);
1676         return sprintf(buf, "%s\n", drive->id->model);
1677 }
1678
1679 static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
1680                              char *buf)
1681 {
1682         ide_drive_t *drive = to_ide_device(dev);
1683         return sprintf(buf, "%s\n", drive->id->fw_rev);
1684 }
1685
1686 static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
1687                            char *buf)
1688 {
1689         ide_drive_t *drive = to_ide_device(dev);
1690         return sprintf(buf, "%s\n", drive->id->serial_no);
1691 }
1692
1693 static struct device_attribute ide_dev_attrs[] = {
1694         __ATTR_RO(media),
1695         __ATTR_RO(drivename),
1696         __ATTR_RO(modalias),
1697         __ATTR_RO(model),
1698         __ATTR_RO(firmware),
1699         __ATTR(serial, 0400, serial_show, NULL),
1700         __ATTR_NULL
1701 };
1702
1703 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
1704 {
1705         ide_drive_t *drive = to_ide_device(dev);
1706
1707         add_uevent_var(env, "MEDIA=%s", media_string(drive));
1708         add_uevent_var(env, "DRIVENAME=%s", drive->name);
1709         add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
1710         return 0;
1711 }
1712
1713 static int generic_ide_probe(struct device *dev)
1714 {
1715         ide_drive_t *drive = to_ide_device(dev);
1716         ide_driver_t *drv = to_ide_driver(dev->driver);
1717
1718         return drv->probe ? drv->probe(drive) : -ENODEV;
1719 }
1720
1721 static int generic_ide_remove(struct device *dev)
1722 {
1723         ide_drive_t *drive = to_ide_device(dev);
1724         ide_driver_t *drv = to_ide_driver(dev->driver);
1725
1726         if (drv->remove)
1727                 drv->remove(drive);
1728
1729         return 0;
1730 }
1731
1732 static void generic_ide_shutdown(struct device *dev)
1733 {
1734         ide_drive_t *drive = to_ide_device(dev);
1735         ide_driver_t *drv = to_ide_driver(dev->driver);
1736
1737         if (dev->driver && drv->shutdown)
1738                 drv->shutdown(drive);
1739 }
1740
1741 struct bus_type ide_bus_type = {
1742         .name           = "ide",
1743         .match          = ide_bus_match,
1744         .uevent         = ide_uevent,
1745         .probe          = generic_ide_probe,
1746         .remove         = generic_ide_remove,
1747         .shutdown       = generic_ide_shutdown,
1748         .dev_attrs      = ide_dev_attrs,
1749         .suspend        = generic_ide_suspend,
1750         .resume         = generic_ide_resume,
1751 };
1752
1753 EXPORT_SYMBOL_GPL(ide_bus_type);
1754
1755 /*
1756  * This is gets invoked once during initialization, to set *everything* up
1757  */
1758 static int __init ide_init(void)
1759 {
1760         int ret;
1761
1762         printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
1763         system_bus_speed = ide_system_bus_speed();
1764
1765         ret = bus_register(&ide_bus_type);
1766         if (ret < 0) {
1767                 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1768                 return ret;
1769         }
1770
1771         init_ide_data();
1772
1773         proc_ide_create();
1774
1775 #ifdef CONFIG_BLK_DEV_ALI14XX
1776         if (probe_ali14xx)
1777                 (void)ali14xx_init();
1778 #endif
1779 #ifdef CONFIG_BLK_DEV_UMC8672
1780         if (probe_umc8672)
1781                 (void)umc8672_init();
1782 #endif
1783 #ifdef CONFIG_BLK_DEV_DTC2278
1784         if (probe_dtc2278)
1785                 (void)dtc2278_init();
1786 #endif
1787 #ifdef CONFIG_BLK_DEV_HT6560B
1788         if (probe_ht6560b)
1789                 (void)ht6560b_init();
1790 #endif
1791 #ifdef CONFIG_BLK_DEV_QD65XX
1792         if (probe_qd65xx)
1793                 (void)qd65xx_init();
1794 #endif
1795
1796         /* Probe for special PCI and other "known" interface chipsets. */
1797         probe_for_hwifs();
1798
1799         return 0;
1800 }
1801
1802 #ifdef MODULE
1803 static char *options = NULL;
1804 module_param(options, charp, 0);
1805 MODULE_LICENSE("GPL");
1806
1807 static void __init parse_options (char *line)
1808 {
1809         char *next = line;
1810
1811         if (line == NULL || !*line)
1812                 return;
1813         while ((line = next) != NULL) {
1814                 if ((next = strchr(line,' ')) != NULL)
1815                         *next++ = 0;
1816                 if (!ide_setup(line))
1817                         printk (KERN_INFO "Unknown option '%s'\n", line);
1818         }
1819 }
1820
1821 int __init init_module (void)
1822 {
1823         parse_options(options);
1824         return ide_init();
1825 }
1826
1827 void __exit cleanup_module (void)
1828 {
1829         int index;
1830
1831         for (index = 0; index < MAX_HWIFS; ++index)
1832                 ide_unregister(index);
1833
1834 #ifdef CONFIG_BLK_DEV_IDEPNP
1835         pnpide_exit();
1836 #endif
1837
1838         proc_ide_destroy();
1839
1840         bus_unregister(&ide_bus_type);
1841 }
1842
1843 #else /* !MODULE */
1844
1845 __setup("", ide_setup);
1846
1847 module_init(ide_init);
1848
1849 #endif /* MODULE */