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   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->intrproc                  = tmp_hwif->intrproc;
 428         hwif->maskproc                  = tmp_hwif->maskproc;
 429         hwif->quirkproc                 = tmp_hwif->quirkproc;
 430         hwif->busproc                   = tmp_hwif->busproc;
 431
 432         hwif->ata_input_data            = tmp_hwif->ata_input_data;
 433         hwif->ata_output_data           = tmp_hwif->ata_output_data;
 434         hwif->atapi_input_bytes         = tmp_hwif->atapi_input_bytes;
 435         hwif->atapi_output_bytes        = tmp_hwif->atapi_output_bytes;
 436
 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_on                = tmp_hwif->ide_dma_on;
 442         hwif->dma_off_quietly           = tmp_hwif->dma_off_quietly;
 443         hwif->ide_dma_test_irq          = tmp_hwif->ide_dma_test_irq;
 444         hwif->ide_dma_clear_irq         = tmp_hwif->ide_dma_clear_irq;
 445         hwif->dma_host_on               = tmp_hwif->dma_host_on;
 446         hwif->dma_host_off              = tmp_hwif->dma_host_off;
 447         hwif->dma_lost_irq              = tmp_hwif->dma_lost_irq;
 448         hwif->dma_timeout               = tmp_hwif->dma_timeout;
 449
 450         hwif->OUTB                      = tmp_hwif->OUTB;
 451         hwif->OUTBSYNC                  = tmp_hwif->OUTBSYNC;
 452         hwif->OUTW                      = tmp_hwif->OUTW;
 453         hwif->OUTSW                     = tmp_hwif->OUTSW;
 454         hwif->OUTSL                     = tmp_hwif->OUTSL;
 455
 456         hwif->INB                       = tmp_hwif->INB;
 457         hwif->INW                       = tmp_hwif->INW;
 458         hwif->INSW                      = tmp_hwif->INSW;
 459         hwif->INSL                      = tmp_hwif->INSL;
 460
 461         hwif->sg_max_nents              = tmp_hwif->sg_max_nents;
 462
 463         hwif->mmio                      = tmp_hwif->mmio;
 464         hwif->rqsize                    = tmp_hwif->rqsize;
 465
 466 #ifndef CONFIG_BLK_DEV_IDECS
 467         hwif->irq                       = tmp_hwif->irq;
 468 #endif
 469
 470         hwif->dma_base                  = tmp_hwif->dma_base;
 471         hwif->dma_master                = tmp_hwif->dma_master;
 472         hwif->dma_command               = tmp_hwif->dma_command;
 473         hwif->dma_vendor1               = tmp_hwif->dma_vendor1;
 474         hwif->dma_status                = tmp_hwif->dma_status;
 475         hwif->dma_vendor3               = tmp_hwif->dma_vendor3;
 476         hwif->dma_prdtable              = tmp_hwif->dma_prdtable;
 477
 478         hwif->config_data               = tmp_hwif->config_data;
 479         hwif->select_data               = tmp_hwif->select_data;
 480         hwif->extra_base                = tmp_hwif->extra_base;
 481         hwif->extra_ports               = tmp_hwif->extra_ports;
 482
 483         hwif->hwif_data                 = tmp_hwif->hwif_data;
 484 }
 485
 486 /**
 487  *      ide_unregister          -       free an IDE interface
 488  *      @index: index of interface (will change soon to a pointer)
 489  *
 490  *      Perform the final unregister of an IDE interface. At the moment
 491  *      we don't refcount interfaces so this will also get split up.
 492  *
 493  *      Locking:
 494  *      The caller must not hold the IDE locks
 495  *      The drive present/vanishing is not yet properly locked
 496  *      Take care with the callbacks. These have been split to avoid
 497  *      deadlocking the IDE layer. The shutdown callback is called
 498  *      before we take the lock and free resources. It is up to the
 499  *      caller to be sure there is no pending I/O here, and that
 500  *      the interface will not be reopened (present/vanishing locking
 501  *      isn't yet done BTW). After we commit to the final kill we
 502  *      call the cleanup callback with the ide locks held.
 503  *
 504  *      Unregister restores the hwif structures to the default state.
 505  *      This is raving bonkers.
 506  */
 507
 508 void ide_unregister(unsigned int index)
 509 {
 510         ide_drive_t *drive;
 511         ide_hwif_t *hwif, *g;
 512         static ide_hwif_t tmp_hwif; /* protected by ide_cfg_mtx */
 513         ide_hwgroup_t *hwgroup;
 514         int irq_count = 0, unit;
 515
 516         BUG_ON(index >= MAX_HWIFS);
 517
 518         BUG_ON(in_interrupt());
 519         BUG_ON(irqs_disabled());
 520         mutex_lock(&ide_cfg_mtx);
 521         spin_lock_irq(&ide_lock);
 522         hwif = &ide_hwifs[index];
 523         if (!hwif->present)
 524                 goto abort;
 525         for (unit = 0; unit < MAX_DRIVES; ++unit) {
 526                 drive = &hwif->drives[unit];
 527                 if (!drive->present)
 528                         continue;
 529                 spin_unlock_irq(&ide_lock);
 530                 device_unregister(&drive->gendev);
 531                 wait_for_completion(&drive->gendev_rel_comp);
 532                 spin_lock_irq(&ide_lock);
 533         }
 534         hwif->present = 0;
 535
 536         spin_unlock_irq(&ide_lock);
 537
 538         ide_proc_unregister_port(hwif);
 539
 540         hwgroup = hwif->hwgroup;
 541         /*
 542          * free the irq if we were the only hwif using it
 543          */
 544         g = hwgroup->hwif;
 545         do {
 546                 if (g->irq == hwif->irq)
 547                         ++irq_count;
 548                 g = g->next;
 549         } while (g != hwgroup->hwif);
 550         if (irq_count == 1)
 551                 free_irq(hwif->irq, hwgroup);
 552
 553         spin_lock_irq(&ide_lock);
 554         /*
 555          * Note that we only release the standard ports,
 556          * and do not even try to handle any extra ports
 557          * allocated for weird IDE interface chipsets.
 558          */
 559         ide_hwif_release_regions(hwif);
 560
 561         /*
 562          * Remove us from the hwgroup, and free
 563          * the hwgroup if we were the only member
 564          */
 565         if (hwif->next == hwif) {
 566                 BUG_ON(hwgroup->hwif != hwif);
 567                 kfree(hwgroup);
 568         } else {
 569                 /* There is another interface in hwgroup.
 570                  * Unlink us, and set hwgroup->drive and ->hwif to
 571                  * something sane.
 572                  */
 573                 g = hwgroup->hwif;
 574                 while (g->next != hwif)
 575                         g = g->next;
 576                 g->next = hwif->next;
 577                 if (hwgroup->hwif == hwif) {
 578                         /* Chose a random hwif for hwgroup->hwif.
 579                          * It's guaranteed that there are no drives
 580                          * left in the hwgroup.
 581                          */
 582                         BUG_ON(hwgroup->drive != NULL);
 583                         hwgroup->hwif = g;
 584                 }
 585                 BUG_ON(hwgroup->hwif == hwif);
 586         }
 587
 588         /* More messed up locking ... */
 589         spin_unlock_irq(&ide_lock);
 590         device_unregister(&hwif->gendev);
 591         wait_for_completion(&hwif->gendev_rel_comp);
 592
 593         /*
 594          * Remove us from the kernel's knowledge
 595          */
 596         blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
 597         kfree(hwif->sg_table);
 598         unregister_blkdev(hwif->major, hwif->name);
 599         spin_lock_irq(&ide_lock);
 600
 601         if (hwif->dma_base) {
 602                 (void) ide_release_dma(hwif);
 603
 604                 hwif->dma_base = 0;
 605                 hwif->dma_master = 0;
 606                 hwif->dma_command = 0;
 607                 hwif->dma_vendor1 = 0;
 608                 hwif->dma_status = 0;
 609                 hwif->dma_vendor3 = 0;
 610                 hwif->dma_prdtable = 0;
 611
 612                 hwif->extra_base  = 0;
 613                 hwif->extra_ports = 0;
 614         }
 615
 616         /* copy original settings */
 617         tmp_hwif = *hwif;
 618
 619         /* restore hwif data to pristine status */
 620         init_hwif_data(hwif, index);
 621         init_hwif_default(hwif, index);
 622
 623         ide_hwif_restore(hwif, &tmp_hwif);
 624
 625 abort:
 626         spin_unlock_irq(&ide_lock);
 627         mutex_unlock(&ide_cfg_mtx);
 628 }
 629
 630 EXPORT_SYMBOL(ide_unregister);
 631
 632
 633 /**
 634  *      ide_setup_ports         -       set up IDE interface ports
 635  *      @hw: register descriptions
 636  *      @base: base register
 637  *      @offsets: table of register offsets
 638  *      @ctrl: control register
 639  *      @ack_irq: IRQ ack
 640  *      @irq: interrupt lie
 641  *
 642  *      Setup hw_regs_t structure described by parameters.  You
 643  *      may set up the hw structure yourself OR use this routine to
 644  *      do it for you. This is basically a helper
 645  *
 646  */
 647
 648 void ide_setup_ports (  hw_regs_t *hw,
 649                         unsigned long base, int *offsets,
 650                         unsigned long ctrl, unsigned long intr,
 651                         ide_ack_intr_t *ack_intr,
 652 /*
 653  *                      ide_io_ops_t *iops,
 654  */
 655                         int irq)
 656 {
 657         int i;
 658
 659         memset(hw, 0, sizeof(hw_regs_t));
 660         for (i = 0; i < IDE_NR_PORTS; i++) {
 661                 if (offsets[i] == -1) {
 662                         switch(i) {
 663                                 case IDE_CONTROL_OFFSET:
 664                                         hw->io_ports[i] = ctrl;
 665                                         break;
 666 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
 667                                 case IDE_IRQ_OFFSET:
 668                                         hw->io_ports[i] = intr;
 669                                         break;
 670 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
 671                                 default:
 672                                         hw->io_ports[i] = 0;
 673                                         break;
 674                         }
 675                 } else {
 676                         hw->io_ports[i] = base + offsets[i];
 677                 }
 678         }
 679         hw->irq = irq;
 680         hw->ack_intr = ack_intr;
 681 /*
 682  *      hw->iops = iops;
 683  */
 684 }
 685
 686 /**
 687  *      ide_register_hw         -       register IDE interface
 688  *      @hw: hardware registers
 689  *      @fixup: fixup function
 690  *      @initializing: set while initializing built-in drivers
 691  *      @hwifp: pointer to returned hwif
 692  *
 693  *      Register an IDE interface, specifying exactly the registers etc.
 694  *      Set init=1 iff calling before probes have taken place.
 695  *
 696  *      Returns -1 on error.
 697  */
 698
 699 int ide_register_hw(hw_regs_t *hw, void (*fixup)(ide_hwif_t *),
 700                     int initializing, ide_hwif_t **hwifp)
 701 {
 702         int index, retry = 1;
 703         ide_hwif_t *hwif;
 704
 705         do {
 706                 for (index = 0; index < MAX_HWIFS; ++index) {
 707                         hwif = &ide_hwifs[index];
 708                         if (hwif->io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
 709                                 goto found;
 710                 }
 711                 for (index = 0; index < MAX_HWIFS; ++index) {
 712                         hwif = &ide_hwifs[index];
 713                         if (hwif->hold)
 714                                 continue;
 715                         if ((!hwif->present && !hwif->mate && !initializing) ||
 716                             (!hwif->io_ports[IDE_DATA_OFFSET] && initializing))
 717                                 goto found;
 718                 }
 719                 for (index = 0; index < MAX_HWIFS; index++)
 720                         ide_unregister(index);
 721         } while (retry--);
 722         return -1;
 723 found:
 724         if (hwif->present)
 725                 ide_unregister(index);
 726         else if (!hwif->hold) {
 727                 init_hwif_data(hwif, index);
 728                 init_hwif_default(hwif, index);
 729         }
 730         if (hwif->present)
 731                 return -1;
 732         memcpy(hwif->io_ports, hw->io_ports, sizeof(hwif->io_ports));
 733         hwif->irq = hw->irq;
 734         hwif->noprobe = 0;
 735         hwif->fixup = fixup;
 736         hwif->chipset = hw->chipset;
 737         hwif->gendev.parent = hw->dev;
 738         hwif->ack_intr = hw->ack_intr;
 739
 740         if (initializing == 0) {
 741                 u8 idx[4] = { index, 0xff, 0xff, 0xff };
 742
 743                 ide_device_add(idx);
 744         }
 745
 746         if (hwifp)
 747                 *hwifp = hwif;
 748
 749         return (initializing || hwif->present) ? index : -1;
 750 }
 751
 752 EXPORT_SYMBOL(ide_register_hw);
 753
 754 /*
 755  *      Locks for IDE setting functionality
 756  */
 757
 758 DEFINE_MUTEX(ide_setting_mtx);
 759
 760 EXPORT_SYMBOL_GPL(ide_setting_mtx);
 761
 762 /**
 763  *      ide_spin_wait_hwgroup   -       wait for group
 764  *      @drive: drive in the group
 765  *
 766  *      Wait for an IDE device group to go non busy and then return
 767  *      holding the ide_lock which guards the hwgroup->busy status
 768  *      and right to use it.
 769  */
 770
 771 int ide_spin_wait_hwgroup (ide_drive_t *drive)
 772 {
 773         ide_hwgroup_t *hwgroup = HWGROUP(drive);
 774         unsigned long timeout = jiffies + (3 * HZ);
 775
 776         spin_lock_irq(&ide_lock);
 777
 778         while (hwgroup->busy) {
 779                 unsigned long lflags;
 780                 spin_unlock_irq(&ide_lock);
 781                 local_irq_set(lflags);
 782                 if (time_after(jiffies, timeout)) {
 783                         local_irq_restore(lflags);
 784                         printk(KERN_ERR "%s: channel busy\n", drive->name);
 785                         return -EBUSY;
 786                 }
 787                 local_irq_restore(lflags);
 788                 spin_lock_irq(&ide_lock);
 789         }
 790         return 0;
 791 }
 792
 793 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
 794
 795 int set_io_32bit(ide_drive_t *drive, int arg)
 796 {
 797         if (drive->no_io_32bit)
 798                 return -EPERM;
 799
 800         if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
 801                 return -EINVAL;
 802
 803         drive->io_32bit = arg;
 804 #ifdef CONFIG_BLK_DEV_DTC2278
 805         if (HWIF(drive)->chipset == ide_dtc2278)
 806                 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
 807 #endif /* CONFIG_BLK_DEV_DTC2278 */
 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->ide_dma_on == 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                 hwif->dma_off_quietly(drive);
 852                 if (ide_set_dma(drive) || hwif->ide_dma_on(drive))
 853                         err = -EIO;
 854         } else
 855                 ide_dma_off(drive);
 856
 857         /*
 858          * lock, clear ->busy flag and unlock before leaving
 859          */
 860         spin_lock_irq(&ide_lock);
 861         hwif->hwgroup->busy = 0;
 862         spin_unlock_irq(&ide_lock);
 863 out:
 864         return err;
 865 #else
 866         if (arg < 0 || arg > 1)
 867                 return -EINVAL;
 868
 869         return -EPERM;
 870 #endif
 871 }
 872
 873 int set_pio_mode(ide_drive_t *drive, int arg)
 874 {
 875         struct request rq;
 876
 877         if (arg < 0 || arg > 255)
 878                 return -EINVAL;
 879
 880         if (drive->hwif->set_pio_mode == NULL)
 881                 return -ENOSYS;
 882
 883         if (drive->special.b.set_tune)
 884                 return -EBUSY;
 885         ide_init_drive_cmd(&rq);
 886         drive->tune_req = (u8) arg;
 887         drive->special.b.set_tune = 1;
 888         (void) ide_do_drive_cmd(drive, &rq, ide_wait);
 889         return 0;
 890 }
 891
 892 static int set_unmaskirq(ide_drive_t *drive, int arg)
 893 {
 894         if (drive->no_unmask)
 895                 return -EPERM;
 896
 897         if (arg < 0 || arg > 1)
 898                 return -EINVAL;
 899
 900         if (ide_spin_wait_hwgroup(drive))
 901                 return -EBUSY;
 902         drive->unmask = arg;
 903         spin_unlock_irq(&ide_lock);
 904
 905         return 0;
 906 }
 907
 908 /**
 909  *      system_bus_clock        -       clock guess
 910  *
 911  *      External version of the bus clock guess used by very old IDE drivers
 912  *      for things like VLB timings. Should not be used.
 913  */
 914
 915 int system_bus_clock (void)
 916 {
 917         return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
 918 }
 919
 920 EXPORT_SYMBOL(system_bus_clock);
 921
 922 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
 923 {
 924         ide_drive_t *drive = dev->driver_data;
 925         ide_hwif_t *hwif = HWIF(drive);
 926         struct request rq;
 927         struct request_pm_state rqpm;
 928         ide_task_t args;
 929         int ret;
 930
 931         /* Call ACPI _GTM only once */
 932         if (!(drive->dn % 2))
 933                 ide_acpi_get_timing(hwif);
 934
 935         memset(&rq, 0, sizeof(rq));
 936         memset(&rqpm, 0, sizeof(rqpm));
 937         memset(&args, 0, sizeof(args));
 938         rq.cmd_type = REQ_TYPE_PM_SUSPEND;
 939         rq.special = &args;
 940         rq.data = &rqpm;
 941         rqpm.pm_step = ide_pm_state_start_suspend;
 942         if (mesg.event == PM_EVENT_PRETHAW)
 943                 mesg.event = PM_EVENT_FREEZE;
 944         rqpm.pm_state = mesg.event;
 945
 946         ret = ide_do_drive_cmd(drive, &rq, ide_wait);
 947         /* only call ACPI _PS3 after both drivers are suspended */
 948         if (!ret && (((drive->dn % 2) && hwif->drives[0].present
 949                  && hwif->drives[1].present)
 950                  || !hwif->drives[0].present
 951                  || !hwif->drives[1].present))
 952                 ide_acpi_set_state(hwif, 0);
 953         return ret;
 954 }
 955
 956 static int generic_ide_resume(struct device *dev)
 957 {
 958         ide_drive_t *drive = dev->driver_data;
 959         ide_hwif_t *hwif = HWIF(drive);
 960         struct request rq;
 961         struct request_pm_state rqpm;
 962         ide_task_t args;
 963         int err;
 964
 965         /* Call ACPI _STM only once */
 966         if (!(drive->dn % 2)) {
 967                 ide_acpi_set_state(hwif, 1);
 968                 ide_acpi_push_timing(hwif);
 969         }
 970
 971         ide_acpi_exec_tfs(drive);
 972
 973         memset(&rq, 0, sizeof(rq));
 974         memset(&rqpm, 0, sizeof(rqpm));
 975         memset(&args, 0, sizeof(args));
 976         rq.cmd_type = REQ_TYPE_PM_RESUME;
 977         rq.special = &args;
 978         rq.data = &rqpm;
 979         rqpm.pm_step = ide_pm_state_start_resume;
 980         rqpm.pm_state = PM_EVENT_ON;
 981
 982         err = ide_do_drive_cmd(drive, &rq, ide_head_wait);
 983
 984         if (err == 0 && dev->driver) {
 985                 ide_driver_t *drv = to_ide_driver(dev->driver);
 986
 987                 if (drv->resume)
 988                         drv->resume(drive);
 989         }
 990
 991         return err;
 992 }
 993
 994 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
 995                         unsigned int cmd, unsigned long arg)
 996 {
 997         unsigned long flags;
 998         ide_driver_t *drv;
 999         void __user *p = (void __user *)arg;
1000         int err = 0, (*setfunc)(ide_drive_t *, int);
1001         u8 *val;
1002
1003         switch (cmd) {
1004         case HDIO_GET_32BIT:        val = &drive->io_32bit;      goto read_val;
1005         case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
1006         case HDIO_GET_UNMASKINTR:   val = &drive->unmask;        goto read_val;
1007         case HDIO_GET_DMA:          val = &drive->using_dma;     goto read_val;
1008         case HDIO_SET_32BIT:        setfunc = set_io_32bit;      goto set_val;
1009         case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings;     goto set_val;
1010         case HDIO_SET_PIO_MODE:     setfunc = set_pio_mode;      goto set_val;
1011         case HDIO_SET_UNMASKINTR:   setfunc = set_unmaskirq;     goto set_val;
1012         case HDIO_SET_DMA:          setfunc = set_using_dma;     goto set_val;
1013         }
1014
1015         switch (cmd) {
1016                 case HDIO_OBSOLETE_IDENTITY:
1017                 case HDIO_GET_IDENTITY:
1018                         if (bdev != bdev->bd_contains)
1019                                 return -EINVAL;
1020                         if (drive->id_read == 0)
1021                                 return -ENOMSG;
1022                         if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1023                                 return -EFAULT;
1024                         return 0;
1025
1026                 case HDIO_GET_NICE:
1027                         return put_user(drive->dsc_overlap      <<      IDE_NICE_DSC_OVERLAP    |
1028                                         drive->atapi_overlap    <<      IDE_NICE_ATAPI_OVERLAP  |
1029                                         drive->nice0            <<      IDE_NICE_0              |
1030                                         drive->nice1            <<      IDE_NICE_1              |
1031                                         drive->nice2            <<      IDE_NICE_2,
1032                                         (long __user *) arg);
1033
1034 #ifdef CONFIG_IDE_TASK_IOCTL
1035                 case HDIO_DRIVE_TASKFILE:
1036                         if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1037                                 return -EACCES;
1038                         switch(drive->media) {
1039                                 case ide_disk:
1040                                         return ide_taskfile_ioctl(drive, cmd, arg);
1041                                 default:
1042                                         return -ENOMSG;
1043                         }
1044 #endif /* CONFIG_IDE_TASK_IOCTL */
1045
1046                 case HDIO_DRIVE_CMD:
1047                         if (!capable(CAP_SYS_RAWIO))
1048                                 return -EACCES;
1049                         return ide_cmd_ioctl(drive, cmd, arg);
1050
1051                 case HDIO_DRIVE_TASK:
1052                         if (!capable(CAP_SYS_RAWIO))
1053                                 return -EACCES;
1054                         return ide_task_ioctl(drive, cmd, arg);
1055
1056                 case HDIO_SCAN_HWIF:
1057                 {
1058                         hw_regs_t hw;
1059                         int args[3];
1060                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1061                         if (copy_from_user(args, p, 3 * sizeof(int)))
1062                                 return -EFAULT;
1063                         memset(&hw, 0, sizeof(hw));
1064                         ide_init_hwif_ports(&hw, (unsigned long) args[0],
1065                                             (unsigned long) args[1], NULL);
1066                         hw.irq = args[2];
1067                         if (ide_register_hw(&hw, NULL, 0, NULL) == -1)
1068                                 return -EIO;
1069                         return 0;
1070                 }
1071                 case HDIO_UNREGISTER_HWIF:
1072                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1073                         /* (arg > MAX_HWIFS) checked in function */
1074                         ide_unregister(arg);
1075                         return 0;
1076                 case HDIO_SET_NICE:
1077                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1078                         if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1079                                 return -EPERM;
1080                         drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1081                         drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1082                         if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1083                                 drive->dsc_overlap = 0;
1084                                 return -EPERM;
1085                         }
1086                         drive->nice1 = (arg >> IDE_NICE_1) & 1;
1087                         return 0;
1088                 case HDIO_DRIVE_RESET:
1089                 {
1090                         unsigned long flags;
1091                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1092
1093                         /*
1094                          *      Abort the current command on the
1095                          *      group if there is one, taking
1096                          *      care not to allow anything else
1097                          *      to be queued and to die on the
1098                          *      spot if we miss one somehow
1099                          */
1100
1101                         spin_lock_irqsave(&ide_lock, flags);
1102
1103                         if (HWGROUP(drive)->resetting) {
1104                                 spin_unlock_irqrestore(&ide_lock, flags);
1105                                 return -EBUSY;
1106                         }
1107
1108                         ide_abort(drive, "drive reset");
1109
1110                         BUG_ON(HWGROUP(drive)->handler);
1111
1112                         /* Ensure nothing gets queued after we
1113                            drop the lock. Reset will clear the busy */
1114
1115                         HWGROUP(drive)->busy = 1;
1116                         spin_unlock_irqrestore(&ide_lock, flags);
1117                         (void) ide_do_reset(drive);
1118
1119                         return 0;
1120                 }
1121
1122                 case HDIO_GET_BUSSTATE:
1123                         if (!capable(CAP_SYS_ADMIN))
1124                                 return -EACCES;
1125                         if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1126                                 return -EFAULT;
1127                         return 0;
1128
1129                 case HDIO_SET_BUSSTATE:
1130                         if (!capable(CAP_SYS_ADMIN))
1131                                 return -EACCES;
1132                         if (HWIF(drive)->busproc)
1133                                 return HWIF(drive)->busproc(drive, (int)arg);
1134                         return -EOPNOTSUPP;
1135                 default:
1136                         return -EINVAL;
1137         }
1138
1139 read_val:
1140         mutex_lock(&ide_setting_mtx);
1141         spin_lock_irqsave(&ide_lock, flags);
1142         err = *val;
1143         spin_unlock_irqrestore(&ide_lock, flags);
1144         mutex_unlock(&ide_setting_mtx);
1145         return err >= 0 ? put_user(err, (long __user *)arg) : err;
1146
1147 set_val:
1148         if (bdev != bdev->bd_contains)
1149                 err = -EINVAL;
1150         else {
1151                 if (!capable(CAP_SYS_ADMIN))
1152                         err = -EACCES;
1153                 else {
1154                         mutex_lock(&ide_setting_mtx);
1155                         err = setfunc(drive, arg);
1156                         mutex_unlock(&ide_setting_mtx);
1157                 }
1158         }
1159         return err;
1160 }
1161
1162 EXPORT_SYMBOL(generic_ide_ioctl);
1163
1164 /*
1165  * stridx() returns the offset of c within s,
1166  * or -1 if c is '\0' or not found within s.
1167  */
1168 static int __init stridx (const char *s, char c)
1169 {
1170         char *i = strchr(s, c);
1171         return (i && c) ? i - s : -1;
1172 }
1173
1174 /*
1175  * match_parm() does parsing for ide_setup():
1176  *
1177  * 1. the first char of s must be '='.
1178  * 2. if the remainder matches one of the supplied keywords,
1179  *     the index (1 based) of the keyword is negated and returned.
1180  * 3. if the remainder is a series of no more than max_vals numbers
1181  *     separated by commas, the numbers are saved in vals[] and a
1182  *     count of how many were saved is returned.  Base10 is assumed,
1183  *     and base16 is allowed when prefixed with "0x".
1184  * 4. otherwise, zero is returned.
1185  */
1186 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1187 {
1188         static const char *decimal = "0123456789";
1189         static const char *hex = "0123456789abcdef";
1190         int i, n;
1191
1192         if (*s++ == '=') {
1193                 /*
1194                  * Try matching against the supplied keywords,
1195                  * and return -(index+1) if we match one
1196                  */
1197                 if (keywords != NULL) {
1198                         for (i = 0; *keywords != NULL; ++i) {
1199                                 if (!strcmp(s, *keywords++))
1200                                         return -(i+1);
1201                         }
1202                 }
1203                 /*
1204                  * Look for a series of no more than "max_vals"
1205                  * numeric values separated by commas, in base10,
1206                  * or base16 when prefixed with "0x".
1207                  * Return a count of how many were found.
1208                  */
1209                 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1210                         vals[n] = i;
1211                         while ((i = stridx(decimal, *++s)) >= 0)
1212                                 vals[n] = (vals[n] * 10) + i;
1213                         if (*s == 'x' && !vals[n]) {
1214                                 while ((i = stridx(hex, *++s)) >= 0)
1215                                         vals[n] = (vals[n] * 0x10) + i;
1216                         }
1217                         if (++n == max_vals)
1218                                 break;
1219                         if (*s == ',' || *s == ';')
1220                                 ++s;
1221                 }
1222                 if (!*s)
1223                         return n;
1224         }
1225         return 0;       /* zero = nothing matched */
1226 }
1227
1228 #ifdef CONFIG_BLK_DEV_ALI14XX
1229 extern int probe_ali14xx;
1230 extern int ali14xx_init(void);
1231 #endif
1232 #ifdef CONFIG_BLK_DEV_UMC8672
1233 extern int probe_umc8672;
1234 extern int umc8672_init(void);
1235 #endif
1236 #ifdef CONFIG_BLK_DEV_DTC2278
1237 extern int probe_dtc2278;
1238 extern int dtc2278_init(void);
1239 #endif
1240 #ifdef CONFIG_BLK_DEV_HT6560B
1241 extern int probe_ht6560b;
1242 extern int ht6560b_init(void);
1243 #endif
1244 #ifdef CONFIG_BLK_DEV_QD65XX
1245 extern int probe_qd65xx;
1246 extern int qd65xx_init(void);
1247 #endif
1248
1249 static int __initdata is_chipset_set[MAX_HWIFS];
1250
1251 /*
1252  * ide_setup() gets called VERY EARLY during initialization,
1253  * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1254  *
1255  * Remember to update Documentation/ide.txt if you change something here.
1256  */
1257 static int __init ide_setup(char *s)
1258 {
1259         int i, vals[3];
1260         ide_hwif_t *hwif;
1261         ide_drive_t *drive;
1262         unsigned int hw, unit;
1263         const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1264         const char max_hwif  = '0' + (MAX_HWIFS - 1);
1265
1266
1267         if (strncmp(s,"hd",2) == 0 && s[2] == '=')      /* hd= is for hd.c   */
1268                 return 0;                               /* driver and not us */
1269
1270         if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1271                 return 0;
1272
1273         printk(KERN_INFO "ide_setup: %s", s);
1274         init_ide_data ();
1275
1276 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1277         if (!strcmp(s, "ide=doubler")) {
1278                 extern int ide_doubler;
1279
1280                 printk(" : Enabled support for IDE doublers\n");
1281                 ide_doubler = 1;
1282                 return 1;
1283         }
1284 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1285
1286         if (!strcmp(s, "ide=nodma")) {
1287                 printk(" : Prevented DMA\n");
1288                 noautodma = 1;
1289                 goto obsolete_option;
1290         }
1291
1292 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1293         if (!strcmp(s, "ide=reverse")) {
1294                 ide_scan_direction = 1;
1295                 printk(" : Enabled support for IDE inverse scan order.\n");
1296                 return 1;
1297         }
1298 #endif
1299
1300 #ifdef CONFIG_BLK_DEV_IDEACPI
1301         if (!strcmp(s, "ide=noacpi")) {
1302                 //printk(" : Disable IDE ACPI support.\n");
1303                 ide_noacpi = 1;
1304                 return 1;
1305         }
1306         if (!strcmp(s, "ide=acpigtf")) {
1307                 //printk(" : Enable IDE ACPI _GTF support.\n");
1308                 ide_noacpitfs = 0;
1309                 return 1;
1310         }
1311         if (!strcmp(s, "ide=acpionboot")) {
1312                 //printk(" : Call IDE ACPI methods on boot.\n");
1313                 ide_noacpionboot = 0;
1314                 return 1;
1315         }
1316 #endif /* CONFIG_BLK_DEV_IDEACPI */
1317
1318         /*
1319          * Look for drive options:  "hdx="
1320          */
1321         if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1322                 const char *hd_words[] = {
1323                         "none", "noprobe", "nowerr", "cdrom", "nodma",
1324                         "autotune", "noautotune", "minus8", "swapdata", "bswap",
1325                         "noflush", "remap", "remap63", "scsi", NULL };
1326                 unit = s[2] - 'a';
1327                 hw   = unit / MAX_DRIVES;
1328                 unit = unit % MAX_DRIVES;
1329                 hwif = &ide_hwifs[hw];
1330                 drive = &hwif->drives[unit];
1331                 if (strncmp(s + 4, "ide-", 4) == 0) {
1332                         strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1333                         goto done;
1334                 }
1335                 switch (match_parm(&s[3], hd_words, vals, 3)) {
1336                         case -1: /* "none" */
1337                         case -2: /* "noprobe" */
1338                                 drive->noprobe = 1;
1339                                 goto done;
1340                         case -3: /* "nowerr" */
1341                                 drive->bad_wstat = BAD_R_STAT;
1342                                 hwif->noprobe = 0;
1343                                 goto done;
1344                         case -4: /* "cdrom" */
1345                                 drive->present = 1;
1346                                 drive->media = ide_cdrom;
1347                                 /* an ATAPI device ignores DRDY */
1348                                 drive->ready_stat = 0;
1349                                 hwif->noprobe = 0;
1350                                 goto done;
1351                         case -5: /* nodma */
1352                                 drive->nodma = 1;
1353                                 goto done;
1354                         case -6: /* "autotune" */
1355                                 drive->autotune = IDE_TUNE_AUTO;
1356                                 goto obsolete_option;
1357                         case -7: /* "noautotune" */
1358                                 drive->autotune = IDE_TUNE_NOAUTO;
1359                                 goto obsolete_option;
1360                         case -9: /* "swapdata" */
1361                         case -10: /* "bswap" */
1362                                 drive->bswap = 1;
1363                                 goto done;
1364                         case -11: /* noflush */
1365                                 drive->noflush = 1;
1366                                 goto done;
1367                         case -12: /* "remap" */
1368                                 drive->remap_0_to_1 = 1;
1369                                 goto done;
1370                         case -13: /* "remap63" */
1371                                 drive->sect0 = 63;
1372                                 goto done;
1373                         case -14: /* "scsi" */
1374                                 drive->scsi = 1;
1375                                 goto done;
1376                         case 3: /* cyl,head,sect */
1377                                 drive->media    = ide_disk;
1378                                 drive->ready_stat = READY_STAT;
1379                                 drive->cyl      = drive->bios_cyl  = vals[0];
1380                                 drive->head     = drive->bios_head = vals[1];
1381                                 drive->sect     = drive->bios_sect = vals[2];
1382                                 drive->present  = 1;
1383                                 drive->forced_geom = 1;
1384                                 hwif->noprobe = 0;
1385                                 goto done;
1386                         default:
1387                                 goto bad_option;
1388                 }
1389         }
1390
1391         if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1392                 goto bad_option;
1393         /*
1394          * Look for bus speed option:  "idebus="
1395          */
1396         if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1397                 if (match_parm(&s[6], NULL, vals, 1) != 1)
1398                         goto bad_option;
1399                 if (vals[0] >= 20 && vals[0] <= 66) {
1400                         idebus_parameter = vals[0];
1401                 } else
1402                         printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1403                 goto done;
1404         }
1405         /*
1406          * Look for interface options:  "idex="
1407          */
1408         if (s[3] >= '0' && s[3] <= max_hwif) {
1409                 /*
1410                  * Be VERY CAREFUL changing this: note hardcoded indexes below
1411                  * (-8, -9, -10) are reserved to ease the hardcoding.
1412                  */
1413                 static const char *ide_words[] = {
1414                         "noprobe", "serialize", "minus3", "minus4",
1415                         "reset", "minus6", "ata66", "minus8", "minus9",
1416                         "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1417                         "dtc2278", "umc8672", "ali14xx", NULL };
1418
1419                 hw_regs_t hwregs;
1420
1421                 hw = s[3] - '0';
1422                 hwif = &ide_hwifs[hw];
1423                 i = match_parm(&s[4], ide_words, vals, 3);
1424
1425                 /*
1426                  * Cryptic check to ensure chipset not already set for hwif.
1427                  * Note: we can't depend on hwif->chipset here.
1428                  */
1429                 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1430                         /* chipset already specified */
1431                         if (is_chipset_set[hw])
1432                                 goto bad_option;
1433                         if (i > -18 && i <= -11) {
1434                                 /* these drivers are for "ide0=" only */
1435                                 if (hw != 0)
1436                                         goto bad_hwif;
1437                                 /* chipset already specified for 2nd port */
1438                                 if (is_chipset_set[hw+1])
1439                                         goto bad_option;
1440                         }
1441                         is_chipset_set[hw] = 1;
1442                         printk("\n");
1443                 }
1444
1445                 switch (i) {
1446 #ifdef CONFIG_BLK_DEV_ALI14XX
1447                         case -17: /* "ali14xx" */
1448                                 probe_ali14xx = 1;
1449                                 goto done;
1450 #endif
1451 #ifdef CONFIG_BLK_DEV_UMC8672
1452                         case -16: /* "umc8672" */
1453                                 probe_umc8672 = 1;
1454                                 goto done;
1455 #endif
1456 #ifdef CONFIG_BLK_DEV_DTC2278
1457                         case -15: /* "dtc2278" */
1458                                 probe_dtc2278 = 1;
1459                                 goto done;
1460 #endif
1461 #ifdef CONFIG_BLK_DEV_CMD640
1462                         case -14: /* "cmd640_vlb" */
1463                         {
1464                                 extern int cmd640_vlb; /* flag for cmd640.c */
1465                                 cmd640_vlb = 1;
1466                                 goto done;
1467                         }
1468 #endif
1469 #ifdef CONFIG_BLK_DEV_HT6560B
1470                         case -13: /* "ht6560b" */
1471                                 probe_ht6560b = 1;
1472                                 goto done;
1473 #endif
1474 #ifdef CONFIG_BLK_DEV_QD65XX
1475                         case -12: /* "qd65xx" */
1476                                 probe_qd65xx = 1;
1477                                 goto done;
1478 #endif
1479 #ifdef CONFIG_BLK_DEV_4DRIVES
1480                         case -11: /* "four" drives on one set of ports */
1481                         {
1482                                 ide_hwif_t *mate = &ide_hwifs[hw^1];
1483                                 mate->drives[0].select.all ^= 0x20;
1484                                 mate->drives[1].select.all ^= 0x20;
1485                                 hwif->chipset = mate->chipset = ide_4drives;
1486                                 mate->irq = hwif->irq;
1487                                 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1488                                 hwif->mate = mate;
1489                                 mate->mate = hwif;
1490                                 hwif->serialized = mate->serialized = 1;
1491                                 goto obsolete_option;
1492                         }
1493 #endif /* CONFIG_BLK_DEV_4DRIVES */
1494                         case -10: /* minus10 */
1495                         case -9: /* minus9 */
1496                         case -8: /* minus8 */
1497                         case -6:
1498                         case -4:
1499                         case -3:
1500                                 goto bad_option;
1501                         case -7: /* ata66 */
1502 #ifdef CONFIG_BLK_DEV_IDEPCI
1503                                 /*
1504                                  * Use ATA_CBL_PATA40_SHORT so drive side
1505                                  * cable detection is also overriden.
1506                                  */
1507                                 hwif->cbl = ATA_CBL_PATA40_SHORT;
1508                                 goto obsolete_option;
1509 #else
1510                                 goto bad_hwif;
1511 #endif
1512                         case -5: /* "reset" */
1513                                 hwif->reset = 1;
1514                                 goto obsolete_option;
1515                         case -2: /* "serialize" */
1516                                 hwif->mate = &ide_hwifs[hw^1];
1517                                 hwif->mate->mate = hwif;
1518                                 hwif->serialized = hwif->mate->serialized = 1;
1519                                 goto obsolete_option;
1520
1521                         case -1: /* "noprobe" */
1522                                 hwif->noprobe = 1;
1523                                 goto done;
1524
1525                         case 1: /* base */
1526                                 vals[1] = vals[0] + 0x206; /* default ctl */
1527                         case 2: /* base,ctl */
1528                                 vals[2] = 0;    /* default irq = probe for it */
1529                         case 3: /* base,ctl,irq */
1530                                 memset(&hwregs, 0, sizeof(hwregs));
1531                                 ide_init_hwif_ports(&hwregs, vals[0], vals[1], &hwif->irq);
1532                                 memcpy(hwif->io_ports, hwregs.io_ports, sizeof(hwif->io_ports));
1533                                 hwif->irq      = vals[2];
1534                                 hwif->noprobe  = 0;
1535                                 hwif->chipset  = ide_forced;
1536                                 goto obsolete_option;
1537
1538                         case 0: goto bad_option;
1539                         default:
1540                                 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1541                                 return 1;
1542                 }
1543         }
1544 bad_option:
1545         printk(" -- BAD OPTION\n");
1546         return 1;
1547 obsolete_option:
1548         printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1549         return 1;
1550 bad_hwif:
1551         printk("-- NOT SUPPORTED ON ide%d", hw);
1552 done:
1553         printk("\n");
1554         return 1;
1555 }
1556
1557 extern void __init pnpide_init(void);
1558 extern void __exit pnpide_exit(void);
1559 extern void __init h8300_ide_init(void);
1560
1561 /*
1562  * probe_for_hwifs() finds/initializes "known" IDE interfaces
1563  */
1564 static void __init probe_for_hwifs (void)
1565 {
1566 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1567         ide_scan_pcibus(ide_scan_direction);
1568 #endif
1569
1570 #ifdef CONFIG_ETRAX_IDE
1571         {
1572                 extern void init_e100_ide(void);
1573                 init_e100_ide();
1574         }
1575 #endif /* CONFIG_ETRAX_IDE */
1576 #ifdef CONFIG_BLK_DEV_CMD640
1577         {
1578                 extern void ide_probe_for_cmd640x(void);
1579                 ide_probe_for_cmd640x();
1580         }
1581 #endif /* CONFIG_BLK_DEV_CMD640 */
1582 #ifdef CONFIG_BLK_DEV_IDE_PMAC
1583         {
1584                 extern int pmac_ide_probe(void);
1585                 (void)pmac_ide_probe();
1586         }
1587 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
1588 #ifdef CONFIG_BLK_DEV_GAYLE
1589         {
1590                 extern void gayle_init(void);
1591                 gayle_init();
1592         }
1593 #endif /* CONFIG_BLK_DEV_GAYLE */
1594 #ifdef CONFIG_BLK_DEV_FALCON_IDE
1595         {
1596                 extern void falconide_init(void);
1597                 falconide_init();
1598         }
1599 #endif /* CONFIG_BLK_DEV_FALCON_IDE */
1600 #ifdef CONFIG_BLK_DEV_MAC_IDE
1601         {
1602                 extern void macide_init(void);
1603                 macide_init();
1604         }
1605 #endif /* CONFIG_BLK_DEV_MAC_IDE */
1606 #ifdef CONFIG_BLK_DEV_Q40IDE
1607         {
1608                 extern void q40ide_init(void);
1609                 q40ide_init();
1610         }
1611 #endif /* CONFIG_BLK_DEV_Q40IDE */
1612 #ifdef CONFIG_BLK_DEV_BUDDHA
1613         {
1614                 extern void buddha_init(void);
1615                 buddha_init();
1616         }
1617 #endif /* CONFIG_BLK_DEV_BUDDHA */
1618 #ifdef CONFIG_BLK_DEV_IDEPNP
1619         pnpide_init();
1620 #endif
1621 #ifdef CONFIG_H8300
1622         h8300_ide_init();
1623 #endif
1624 }
1625
1626 /*
1627  * Probe module
1628  */
1629
1630 EXPORT_SYMBOL(ide_lock);
1631
1632 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1633 {
1634         return 1;
1635 }
1636
1637 static char *media_string(ide_drive_t *drive)
1638 {
1639         switch (drive->media) {
1640         case ide_disk:
1641                 return "disk";
1642         case ide_cdrom:
1643                 return "cdrom";
1644         case ide_tape:
1645                 return "tape";
1646         case ide_floppy:
1647                 return "floppy";
1648         case ide_optical:
1649                 return "optical";
1650         default:
1651                 return "UNKNOWN";
1652         }
1653 }
1654
1655 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1656 {
1657         ide_drive_t *drive = to_ide_device(dev);
1658         return sprintf(buf, "%s\n", media_string(drive));
1659 }
1660
1661 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1662 {
1663         ide_drive_t *drive = to_ide_device(dev);
1664         return sprintf(buf, "%s\n", drive->name);
1665 }
1666
1667 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1668 {
1669         ide_drive_t *drive = to_ide_device(dev);
1670         return sprintf(buf, "ide:m-%s\n", media_string(drive));
1671 }
1672
1673 static struct device_attribute ide_dev_attrs[] = {
1674         __ATTR_RO(media),
1675         __ATTR_RO(drivename),
1676         __ATTR_RO(modalias),
1677         __ATTR_NULL
1678 };
1679
1680 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
1681 {
1682         ide_drive_t *drive = to_ide_device(dev);
1683
1684         add_uevent_var(env, "MEDIA=%s", media_string(drive));
1685         add_uevent_var(env, "DRIVENAME=%s", drive->name);
1686         add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
1687         return 0;
1688 }
1689
1690 static int generic_ide_probe(struct device *dev)
1691 {
1692         ide_drive_t *drive = to_ide_device(dev);
1693         ide_driver_t *drv = to_ide_driver(dev->driver);
1694
1695         return drv->probe ? drv->probe(drive) : -ENODEV;
1696 }
1697
1698 static int generic_ide_remove(struct device *dev)
1699 {
1700         ide_drive_t *drive = to_ide_device(dev);
1701         ide_driver_t *drv = to_ide_driver(dev->driver);
1702
1703         if (drv->remove)
1704                 drv->remove(drive);
1705
1706         return 0;
1707 }
1708
1709 static void generic_ide_shutdown(struct device *dev)
1710 {
1711         ide_drive_t *drive = to_ide_device(dev);
1712         ide_driver_t *drv = to_ide_driver(dev->driver);
1713
1714         if (dev->driver && drv->shutdown)
1715                 drv->shutdown(drive);
1716 }
1717
1718 struct bus_type ide_bus_type = {
1719         .name           = "ide",
1720         .match          = ide_bus_match,
1721         .uevent         = ide_uevent,
1722         .probe          = generic_ide_probe,
1723         .remove         = generic_ide_remove,
1724         .shutdown       = generic_ide_shutdown,
1725         .dev_attrs      = ide_dev_attrs,
1726         .suspend        = generic_ide_suspend,
1727         .resume         = generic_ide_resume,
1728 };
1729
1730 EXPORT_SYMBOL_GPL(ide_bus_type);
1731
1732 /*
1733  * This is gets invoked once during initialization, to set *everything* up
1734  */
1735 static int __init ide_init(void)
1736 {
1737         int ret;
1738
1739         printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
1740         system_bus_speed = ide_system_bus_speed();
1741
1742         ret = bus_register(&ide_bus_type);
1743         if (ret < 0) {
1744                 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1745                 return ret;
1746         }
1747
1748         init_ide_data();
1749
1750         proc_ide_create();
1751
1752 #ifdef CONFIG_BLK_DEV_ALI14XX
1753         if (probe_ali14xx)
1754                 (void)ali14xx_init();
1755 #endif
1756 #ifdef CONFIG_BLK_DEV_UMC8672
1757         if (probe_umc8672)
1758                 (void)umc8672_init();
1759 #endif
1760 #ifdef CONFIG_BLK_DEV_DTC2278
1761         if (probe_dtc2278)
1762                 (void)dtc2278_init();
1763 #endif
1764 #ifdef CONFIG_BLK_DEV_HT6560B
1765         if (probe_ht6560b)
1766                 (void)ht6560b_init();
1767 #endif
1768 #ifdef CONFIG_BLK_DEV_QD65XX
1769         if (probe_qd65xx)
1770                 (void)qd65xx_init();
1771 #endif
1772
1773         /* Probe for special PCI and other "known" interface chipsets. */
1774         probe_for_hwifs();
1775
1776         return 0;
1777 }
1778
1779 #ifdef MODULE
1780 static char *options = NULL;
1781 module_param(options, charp, 0);
1782 MODULE_LICENSE("GPL");
1783
1784 static void __init parse_options (char *line)
1785 {
1786         char *next = line;
1787
1788         if (line == NULL || !*line)
1789                 return;
1790         while ((line = next) != NULL) {
1791                 if ((next = strchr(line,' ')) != NULL)
1792                         *next++ = 0;
1793                 if (!ide_setup(line))
1794                         printk (KERN_INFO "Unknown option '%s'\n", line);
1795         }
1796 }
1797
1798 int __init init_module (void)
1799 {
1800         parse_options(options);
1801         return ide_init();
1802 }
1803
1804 void __exit cleanup_module (void)
1805 {
1806         int index;
1807
1808         for (index = 0; index < MAX_HWIFS; ++index)
1809                 ide_unregister(index);
1810
1811 #ifdef CONFIG_BLK_DEV_IDEPNP
1812         pnpide_exit();
1813 #endif
1814
1815         proc_ide_destroy();
1816
1817         bus_unregister(&ide_bus_type);
1818 }
1819
1820 #else /* !MODULE */
1821
1822 __setup("", ide_setup);
1823
1824 module_init(ide_init);
1825
1826 #endif /* MODULE */