linux/drivers/ide/ide.c
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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
  85static 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
  91static int idebus_parameter;    /* holds the "idebus=" parameter */
  92static int system_bus_speed;    /* holds what we think is VESA/PCI bus speed */
  93
  94DEFINE_MUTEX(ide_cfg_mtx);
  95 __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
  96
  97#ifdef CONFIG_IDEPCI_PCIBUS_ORDER
  98static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
  99#endif
 100
 101int noautodma = 0;
 102
 103#ifdef CONFIG_BLK_DEV_IDEACPI
 104int ide_noacpi = 0;
 105int ide_noacpitfs = 1;
 106int ide_noacpionboot = 1;
 107#endif
 108
 109/*
 110 * This is declared extern in ide.h, for access by other IDE modules:
 111 */
 112ide_hwif_t ide_hwifs[MAX_HWIFS];        /* master data repository */
 113
 114EXPORT_SYMBOL(ide_hwifs);
 115
 116/*
 117 * Do not even *think* about calling this!
 118 */
 119static 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
 163static 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
 180extern 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
 200static 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
 238static 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
 267ide_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;
 285found:
 286        return hwif;
 287}
 288
 289EXPORT_SYMBOL_GPL(ide_find_port);
 290
 291static 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
 312int 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
 340data_region_busy:
 341        addr = hwif->io_ports[IDE_CONTROL_OFFSET];
 342        if (addr)
 343                release_region(addr, 1);
 344control_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
 361void 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
 387static 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
 508void 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
 625abort:
 626        spin_unlock_irq(&ide_lock);
 627        mutex_unlock(&ide_cfg_mtx);
 628}
 629
 630EXPORT_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 
 648void 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
 699int 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;
 723found:
 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
 752EXPORT_SYMBOL(ide_register_hw);
 753
 754/*
 755 *      Locks for IDE setting functionality
 756 */
 757
 758DEFINE_MUTEX(ide_setting_mtx);
 759
 760EXPORT_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
 771int 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
 793EXPORT_SYMBOL(ide_spin_wait_hwgroup);
 794
 795int 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        if (ide_spin_wait_hwgroup(drive))
 804                return -EBUSY;
 805
 806        drive->io_32bit = arg;
 807#ifdef CONFIG_BLK_DEV_DTC2278
 808        if (HWIF(drive)->chipset == ide_dtc2278)
 809                HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
 810#endif /* CONFIG_BLK_DEV_DTC2278 */
 811
 812        spin_unlock_irq(&ide_lock);
 813
 814        return 0;
 815}
 816
 817static int set_ksettings(ide_drive_t *drive, int arg)
 818{
 819        if (arg < 0 || arg > 1)
 820                return -EINVAL;
 821
 822        if (ide_spin_wait_hwgroup(drive))
 823                return -EBUSY;
 824        drive->keep_settings = arg;
 825        spin_unlock_irq(&ide_lock);
 826
 827        return 0;
 828}
 829
 830int set_using_dma(ide_drive_t *drive, int arg)
 831{
 832#ifdef CONFIG_BLK_DEV_IDEDMA
 833        ide_hwif_t *hwif = drive->hwif;
 834        int err = -EPERM;
 835
 836        if (arg < 0 || arg > 1)
 837                return -EINVAL;
 838
 839        if (!drive->id || !(drive->id->capability & 1))
 840                goto out;
 841
 842        if (hwif->ide_dma_on == NULL)
 843                goto out;
 844
 845        err = -EBUSY;
 846        if (ide_spin_wait_hwgroup(drive))
 847                goto out;
 848        /*
 849         * set ->busy flag, unlock and let it ride
 850         */
 851        hwif->hwgroup->busy = 1;
 852        spin_unlock_irq(&ide_lock);
 853
 854        err = 0;
 855
 856        if (arg) {
 857                hwif->dma_off_quietly(drive);
 858                if (ide_set_dma(drive) || hwif->ide_dma_on(drive))
 859                        err = -EIO;
 860        } else
 861                ide_dma_off(drive);
 862
 863        /*
 864         * lock, clear ->busy flag and unlock before leaving
 865         */
 866        spin_lock_irq(&ide_lock);
 867        hwif->hwgroup->busy = 0;
 868        spin_unlock_irq(&ide_lock);
 869out:
 870        return err;
 871#else
 872        if (arg < 0 || arg > 1)
 873                return -EINVAL;
 874
 875        return -EPERM;
 876#endif
 877}
 878
 879int set_pio_mode(ide_drive_t *drive, int arg)
 880{
 881        struct request rq;
 882
 883        if (arg < 0 || arg > 255)
 884                return -EINVAL;
 885
 886        if (drive->hwif->set_pio_mode == NULL)
 887                return -ENOSYS;
 888
 889        if (drive->special.b.set_tune)
 890                return -EBUSY;
 891        ide_init_drive_cmd(&rq);
 892        drive->tune_req = (u8) arg;
 893        drive->special.b.set_tune = 1;
 894        (void) ide_do_drive_cmd(drive, &rq, ide_wait);
 895        return 0;
 896}
 897
 898static int set_unmaskirq(ide_drive_t *drive, int arg)
 899{
 900        if (drive->no_unmask)
 901                return -EPERM;
 902
 903        if (arg < 0 || arg > 1)
 904                return -EINVAL;
 905
 906        if (ide_spin_wait_hwgroup(drive))
 907                return -EBUSY;
 908        drive->unmask = arg;
 909        spin_unlock_irq(&ide_lock);
 910
 911        return 0;
 912}
 913
 914/**
 915 *      system_bus_clock        -       clock guess
 916 *
 917 *      External version of the bus clock guess used by very old IDE drivers
 918 *      for things like VLB timings. Should not be used.
 919 */
 920
 921int system_bus_clock (void)
 922{
 923        return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
 924}
 925
 926EXPORT_SYMBOL(system_bus_clock);
 927
 928static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
 929{
 930        ide_drive_t *drive = dev->driver_data;
 931        ide_hwif_t *hwif = HWIF(drive);
 932        struct request rq;
 933        struct request_pm_state rqpm;
 934        ide_task_t args;
 935        int ret;
 936
 937        /* Call ACPI _GTM only once */
 938        if (!(drive->dn % 2))
 939                ide_acpi_get_timing(hwif);
 940
 941        memset(&rq, 0, sizeof(rq));
 942        memset(&rqpm, 0, sizeof(rqpm));
 943        memset(&args, 0, sizeof(args));
 944        rq.cmd_type = REQ_TYPE_PM_SUSPEND;
 945        rq.special = &args;
 946        rq.data = &rqpm;
 947        rqpm.pm_step = ide_pm_state_start_suspend;
 948        if (mesg.event == PM_EVENT_PRETHAW)
 949                mesg.event = PM_EVENT_FREEZE;
 950        rqpm.pm_state = mesg.event;
 951
 952        ret = ide_do_drive_cmd(drive, &rq, ide_wait);
 953        /* only call ACPI _PS3 after both drivers are suspended */
 954        if (!ret && (((drive->dn % 2) && hwif->drives[0].present
 955                 && hwif->drives[1].present)
 956                 || !hwif->drives[0].present
 957                 || !hwif->drives[1].present))
 958                ide_acpi_set_state(hwif, 0);
 959        return ret;
 960}
 961
 962static int generic_ide_resume(struct device *dev)
 963{
 964        ide_drive_t *drive = dev->driver_data;
 965        ide_hwif_t *hwif = HWIF(drive);
 966        struct request rq;
 967        struct request_pm_state rqpm;
 968        ide_task_t args;
 969        int err;
 970
 971        /* Call ACPI _STM only once */
 972        if (!(drive->dn % 2)) {
 973                ide_acpi_set_state(hwif, 1);
 974                ide_acpi_push_timing(hwif);
 975        }
 976
 977        ide_acpi_exec_tfs(drive);
 978
 979        memset(&rq, 0, sizeof(rq));
 980        memset(&rqpm, 0, sizeof(rqpm));
 981        memset(&args, 0, sizeof(args));
 982        rq.cmd_type = REQ_TYPE_PM_RESUME;
 983        rq.special = &args;
 984        rq.data = &rqpm;
 985        rqpm.pm_step = ide_pm_state_start_resume;
 986        rqpm.pm_state = PM_EVENT_ON;
 987
 988        err = ide_do_drive_cmd(drive, &rq, ide_head_wait);
 989
 990        if (err == 0 && dev->driver) {
 991                ide_driver_t *drv = to_ide_driver(dev->driver);
 992
 993                if (drv->resume)
 994                        drv->resume(drive);
 995        }
 996
 997        return err;
 998}
 999
1000int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
1001                        unsigned int cmd, unsigned long arg)
1002{
1003        unsigned long flags;
1004        ide_driver_t *drv;
1005        void __user *p = (void __user *)arg;
1006        int err = 0, (*setfunc)(ide_drive_t *, int);
1007        u8 *val;
1008
1009        switch (cmd) {
1010        case HDIO_GET_32BIT:        val = &drive->io_32bit;      goto read_val;
1011        case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
1012        case HDIO_GET_UNMASKINTR:   val = &drive->unmask;        goto read_val;
1013        case HDIO_GET_DMA:          val = &drive->using_dma;     goto read_val;
1014        case HDIO_SET_32BIT:        setfunc = set_io_32bit;      goto set_val;
1015        case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings;     goto set_val;
1016        case HDIO_SET_PIO_MODE:     setfunc = set_pio_mode;      goto set_val;
1017        case HDIO_SET_UNMASKINTR:   setfunc = set_unmaskirq;     goto set_val;
1018        case HDIO_SET_DMA:          setfunc = set_using_dma;     goto set_val;
1019        }
1020
1021        switch (cmd) {
1022                case HDIO_OBSOLETE_IDENTITY:
1023                case HDIO_GET_IDENTITY:
1024                        if (bdev != bdev->bd_contains)
1025                                return -EINVAL;
1026                        if (drive->id_read == 0)
1027                                return -ENOMSG;
1028                        if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1029                                return -EFAULT;
1030                        return 0;
1031
1032                case HDIO_GET_NICE:
1033                        return put_user(drive->dsc_overlap      <<      IDE_NICE_DSC_OVERLAP    |
1034                                        drive->atapi_overlap    <<      IDE_NICE_ATAPI_OVERLAP  |
1035                                        drive->nice0            <<      IDE_NICE_0              |
1036                                        drive->nice1            <<      IDE_NICE_1              |
1037                                        drive->nice2            <<      IDE_NICE_2,
1038                                        (long __user *) arg);
1039
1040#ifdef CONFIG_IDE_TASK_IOCTL
1041                case HDIO_DRIVE_TASKFILE:
1042                        if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1043                                return -EACCES;
1044                        switch(drive->media) {
1045                                case ide_disk:
1046                                        return ide_taskfile_ioctl(drive, cmd, arg);
1047                                default:
1048                                        return -ENOMSG;
1049                        }
1050#endif /* CONFIG_IDE_TASK_IOCTL */
1051
1052                case HDIO_DRIVE_CMD:
1053                        if (!capable(CAP_SYS_RAWIO))
1054                                return -EACCES;
1055                        return ide_cmd_ioctl(drive, cmd, arg);
1056
1057                case HDIO_DRIVE_TASK:
1058                        if (!capable(CAP_SYS_RAWIO))
1059                                return -EACCES;
1060                        return ide_task_ioctl(drive, cmd, arg);
1061
1062                case HDIO_SCAN_HWIF:
1063                {
1064                        hw_regs_t hw;
1065                        int args[3];
1066                        if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1067                        if (copy_from_user(args, p, 3 * sizeof(int)))
1068                                return -EFAULT;
1069                        memset(&hw, 0, sizeof(hw));
1070                        ide_init_hwif_ports(&hw, (unsigned long) args[0],
1071                                            (unsigned long) args[1], NULL);
1072                        hw.irq = args[2];
1073                        if (ide_register_hw(&hw, NULL, 0, NULL) == -1)
1074                                return -EIO;
1075                        return 0;
1076                }
1077                case HDIO_UNREGISTER_HWIF:
1078                        if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1079                        /* (arg > MAX_HWIFS) checked in function */
1080                        ide_unregister(arg);
1081                        return 0;
1082                case HDIO_SET_NICE:
1083                        if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1084                        if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1085                                return -EPERM;
1086                        drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1087                        drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1088                        if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1089                                drive->dsc_overlap = 0;
1090                                return -EPERM;
1091                        }
1092                        drive->nice1 = (arg >> IDE_NICE_1) & 1;
1093                        return 0;
1094                case HDIO_DRIVE_RESET:
1095                {
1096                        unsigned long flags;
1097                        if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1098                        
1099                        /*
1100                         *      Abort the current command on the
1101                         *      group if there is one, taking
1102                         *      care not to allow anything else
1103                         *      to be queued and to die on the
1104                         *      spot if we miss one somehow
1105                         */
1106
1107                        spin_lock_irqsave(&ide_lock, flags);
1108
1109                        if (HWGROUP(drive)->resetting) {
1110                                spin_unlock_irqrestore(&ide_lock, flags);
1111                                return -EBUSY;
1112                        }
1113
1114                        ide_abort(drive, "drive reset");
1115
1116                        BUG_ON(HWGROUP(drive)->handler);
1117                                
1118                        /* Ensure nothing gets queued after we
1119                           drop the lock. Reset will clear the busy */
1120                   
1121                        HWGROUP(drive)->busy = 1;
1122                        spin_unlock_irqrestore(&ide_lock, flags);
1123                        (void) ide_do_reset(drive);
1124
1125                        return 0;
1126                }
1127
1128                case HDIO_GET_BUSSTATE:
1129                        if (!capable(CAP_SYS_ADMIN))
1130                                return -EACCES;
1131                        if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1132                                return -EFAULT;
1133                        return 0;
1134
1135                case HDIO_SET_BUSSTATE:
1136                        if (!capable(CAP_SYS_ADMIN))
1137                                return -EACCES;
1138                        if (HWIF(drive)->busproc)
1139                                return HWIF(drive)->busproc(drive, (int)arg);
1140                        return -EOPNOTSUPP;
1141                default:
1142                        return -EINVAL;
1143        }
1144
1145read_val:
1146        mutex_lock(&ide_setting_mtx);
1147        spin_lock_irqsave(&ide_lock, flags);
1148        err = *val;
1149        spin_unlock_irqrestore(&ide_lock, flags);
1150        mutex_unlock(&ide_setting_mtx);
1151        return err >= 0 ? put_user(err, (long __user *)arg) : err;
1152
1153set_val:
1154        if (bdev != bdev->bd_contains)
1155                err = -EINVAL;
1156        else {
1157                if (!capable(CAP_SYS_ADMIN))
1158                        err = -EACCES;
1159                else {
1160                        mutex_lock(&ide_setting_mtx);
1161                        err = setfunc(drive, arg);
1162                        mutex_unlock(&ide_setting_mtx);
1163                }
1164        }
1165        return err;
1166}
1167
1168EXPORT_SYMBOL(generic_ide_ioctl);
1169
1170/*
1171 * stridx() returns the offset of c within s,
1172 * or -1 if c is '\0' or not found within s.
1173 */
1174static int __init stridx (const char *s, char c)
1175{
1176        char *i = strchr(s, c);
1177        return (i && c) ? i - s : -1;
1178}
1179
1180/*
1181 * match_parm() does parsing for ide_setup():
1182 *
1183 * 1. the first char of s must be '='.
1184 * 2. if the remainder matches one of the supplied keywords,
1185 *     the index (1 based) of the keyword is negated and returned.
1186 * 3. if the remainder is a series of no more than max_vals numbers
1187 *     separated by commas, the numbers are saved in vals[] and a
1188 *     count of how many were saved is returned.  Base10 is assumed,
1189 *     and base16 is allowed when prefixed with "0x".
1190 * 4. otherwise, zero is returned.
1191 */
1192static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1193{
1194        static const char *decimal = "0123456789";
1195        static const char *hex = "0123456789abcdef";
1196        int i, n;
1197
1198        if (*s++ == '=') {
1199                /*
1200                 * Try matching against the supplied keywords,
1201                 * and return -(index+1) if we match one
1202                 */
1203                if (keywords != NULL) {
1204                        for (i = 0; *keywords != NULL; ++i) {
1205                                if (!strcmp(s, *keywords++))
1206                                        return -(i+1);
1207                        }
1208                }
1209                /*
1210                 * Look for a series of no more than "max_vals"
1211                 * numeric values separated by commas, in base10,
1212                 * or base16 when prefixed with "0x".
1213                 * Return a count of how many were found.
1214                 */
1215                for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1216                        vals[n] = i;
1217                        while ((i = stridx(decimal, *++s)) >= 0)
1218                                vals[n] = (vals[n] * 10) + i;
1219                        if (*s == 'x' && !vals[n]) {
1220                                while ((i = stridx(hex, *++s)) >= 0)
1221                                        vals[n] = (vals[n] * 0x10) + i;
1222                        }
1223                        if (++n == max_vals)
1224                                break;
1225                        if (*s == ',' || *s == ';')
1226                                ++s;
1227                }
1228                if (!*s)
1229                        return n;
1230        }
1231        return 0;       /* zero = nothing matched */
1232}
1233
1234#ifdef CONFIG_BLK_DEV_ALI14XX
1235extern int probe_ali14xx;
1236extern int ali14xx_init(void);
1237#endif
1238#ifdef CONFIG_BLK_DEV_UMC8672
1239extern int probe_umc8672;
1240extern int umc8672_init(void);
1241#endif
1242#ifdef CONFIG_BLK_DEV_DTC2278
1243extern int probe_dtc2278;
1244extern int dtc2278_init(void);
1245#endif
1246#ifdef CONFIG_BLK_DEV_HT6560B
1247extern int probe_ht6560b;
1248extern int ht6560b_init(void);
1249#endif
1250#ifdef CONFIG_BLK_DEV_QD65XX
1251extern int probe_qd65xx;
1252extern int qd65xx_init(void);
1253#endif
1254
1255static int __initdata is_chipset_set[MAX_HWIFS];
1256
1257/*
1258 * ide_setup() gets called VERY EARLY during initialization,
1259 * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1260 *
1261 * Remember to update Documentation/ide.txt if you change something here.
1262 */
1263static int __init ide_setup(char *s)
1264{
1265        int i, vals[3];
1266        ide_hwif_t *hwif;
1267        ide_drive_t *drive;
1268        unsigned int hw, unit;
1269        const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1270        const char max_hwif  = '0' + (MAX_HWIFS - 1);
1271
1272        
1273        if (strncmp(s,"hd",2) == 0 && s[2] == '=')      /* hd= is for hd.c   */
1274                return 0;                               /* driver and not us */
1275
1276        if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1277                return 0;
1278
1279        printk(KERN_INFO "ide_setup: %s", s);
1280        init_ide_data ();
1281
1282#ifdef CONFIG_BLK_DEV_IDEDOUBLER
1283        if (!strcmp(s, "ide=doubler")) {
1284                extern int ide_doubler;
1285
1286                printk(" : Enabled support for IDE doublers\n");
1287                ide_doubler = 1;
1288                return 1;
1289        }
1290#endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1291
1292        if (!strcmp(s, "ide=nodma")) {
1293                printk(" : Prevented DMA\n");
1294                noautodma = 1;
1295                goto obsolete_option;
1296        }
1297
1298#ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1299        if (!strcmp(s, "ide=reverse")) {
1300                ide_scan_direction = 1;
1301                printk(" : Enabled support for IDE inverse scan order.\n");
1302                return 1;
1303        }
1304#endif
1305
1306#ifdef CONFIG_BLK_DEV_IDEACPI
1307        if (!strcmp(s, "ide=noacpi")) {
1308                //printk(" : Disable IDE ACPI support.\n");
1309                ide_noacpi = 1;
1310                return 1;
1311        }
1312        if (!strcmp(s, "ide=acpigtf")) {
1313                //printk(" : Enable IDE ACPI _GTF support.\n");
1314                ide_noacpitfs = 0;
1315                return 1;
1316        }
1317        if (!strcmp(s, "ide=acpionboot")) {
1318                //printk(" : Call IDE ACPI methods on boot.\n");
1319                ide_noacpionboot = 0;
1320                return 1;
1321        }
1322#endif /* CONFIG_BLK_DEV_IDEACPI */
1323
1324        /*
1325         * Look for drive options:  "hdx="
1326         */
1327        if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1328                const char *hd_words[] = {
1329                        "none", "noprobe", "nowerr", "cdrom", "nodma",
1330                        "autotune", "noautotune", "minus8", "swapdata", "bswap",
1331                        "noflush", "remap", "remap63", "scsi", NULL };
1332                unit = s[2] - 'a';
1333                hw   = unit / MAX_DRIVES;
1334                unit = unit % MAX_DRIVES;
1335                hwif = &ide_hwifs[hw];
1336                drive = &hwif->drives[unit];
1337                if (strncmp(s + 4, "ide-", 4) == 0) {
1338                        strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1339                        goto done;
1340                }
1341                switch (match_parm(&s[3], hd_words, vals, 3)) {
1342                        case -1: /* "none" */
1343                        case -2: /* "noprobe" */
1344                                drive->noprobe = 1;
1345                                goto done;
1346                        case -3: /* "nowerr" */
1347                                drive->bad_wstat = BAD_R_STAT;
1348                                hwif->noprobe = 0;
1349                                goto done;
1350                        case -4: /* "cdrom" */
1351                                drive->present = 1;
1352                                drive->media = ide_cdrom;
1353                                /* an ATAPI device ignores DRDY */
1354                                drive->ready_stat = 0;
1355                                hwif->noprobe = 0;
1356                                goto done;
1357                        case -5: /* nodma */
1358                                drive->nodma = 1;
1359                                goto done;
1360                        case -6: /* "autotune" */
1361                                drive->autotune = IDE_TUNE_AUTO;
1362                                goto obsolete_option;
1363                        case -7: /* "noautotune" */
1364                                drive->autotune = IDE_TUNE_NOAUTO;
1365                                goto obsolete_option;
1366                        case -9: /* "swapdata" */
1367                        case -10: /* "bswap" */
1368                                drive->bswap = 1;
1369                                goto done;
1370                        case -11: /* noflush */
1371                                drive->noflush = 1;
1372                                goto done;
1373                        case -12: /* "remap" */
1374                                drive->remap_0_to_1 = 1;
1375                                goto done;
1376                        case -13: /* "remap63" */
1377                                drive->sect0 = 63;
1378                                goto done;
1379                        case -14: /* "scsi" */
1380                                drive->scsi = 1;
1381                                goto done;
1382                        case 3: /* cyl,head,sect */
1383                                drive->media    = ide_disk;
1384                                drive->ready_stat = READY_STAT;
1385                                drive->cyl      = drive->bios_cyl  = vals[0];
1386                                drive->head     = drive->bios_head = vals[1];
1387                                drive->sect     = drive->bios_sect = vals[2];
1388                                drive->present  = 1;
1389                                drive->forced_geom = 1;
1390                                hwif->noprobe = 0;
1391                                goto done;
1392                        default:
1393                                goto bad_option;
1394                }
1395        }
1396
1397        if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1398                goto bad_option;
1399        /*
1400         * Look for bus speed option:  "idebus="
1401         */
1402        if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1403                if (match_parm(&s[6], NULL, vals, 1) != 1)
1404                        goto bad_option;
1405                if (vals[0] >= 20 && vals[0] <= 66) {
1406                        idebus_parameter = vals[0];
1407                } else
1408                        printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1409                goto done;
1410        }
1411        /*
1412         * Look for interface options:  "idex="
1413         */
1414        if (s[3] >= '0' && s[3] <= max_hwif) {
1415                /*
1416                 * Be VERY CAREFUL changing this: note hardcoded indexes below
1417                 * (-8, -9, -10) are reserved to ease the hardcoding.
1418                 */
1419                static const char *ide_words[] = {
1420                        "noprobe", "serialize", "minus3", "minus4",
1421                        "reset", "minus6", "ata66", "minus8", "minus9",
1422                        "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1423                        "dtc2278", "umc8672", "ali14xx", NULL };
1424
1425                hw_regs_t hwregs;
1426
1427                hw = s[3] - '0';
1428                hwif = &ide_hwifs[hw];
1429                i = match_parm(&s[4], ide_words, vals, 3);
1430
1431                /*
1432                 * Cryptic check to ensure chipset not already set for hwif.
1433                 * Note: we can't depend on hwif->chipset here.
1434                 */
1435                if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1436                        /* chipset already specified */
1437                        if (is_chipset_set[hw])
1438                                goto bad_option;
1439                        if (i > -18 && i <= -11) {
1440                                /* these drivers are for "ide0=" only */
1441                                if (hw != 0)
1442                                        goto bad_hwif;
1443                                /* chipset already specified for 2nd port */
1444                                if (is_chipset_set[hw+1])
1445                                        goto bad_option;
1446                        }
1447                        is_chipset_set[hw] = 1;
1448                        printk("\n");
1449                }
1450
1451                switch (i) {
1452#ifdef CONFIG_BLK_DEV_ALI14XX
1453                        case -17: /* "ali14xx" */
1454                                probe_ali14xx = 1;
1455                                goto done;
1456#endif
1457#ifdef CONFIG_BLK_DEV_UMC8672
1458                        case -16: /* "umc8672" */
1459                                probe_umc8672 = 1;
1460                                goto done;
1461#endif
1462#ifdef CONFIG_BLK_DEV_DTC2278
1463                        case -15: /* "dtc2278" */
1464                                probe_dtc2278 = 1;
1465                                goto done;
1466#endif
1467#ifdef CONFIG_BLK_DEV_CMD640
1468                        case -14: /* "cmd640_vlb" */
1469                        {
1470                                extern int cmd640_vlb; /* flag for cmd640.c */
1471                                cmd640_vlb = 1;
1472                                goto done;
1473                        }
1474#endif
1475#ifdef CONFIG_BLK_DEV_HT6560B
1476                        case -13: /* "ht6560b" */
1477                                probe_ht6560b = 1;
1478                                goto done;
1479#endif
1480#ifdef CONFIG_BLK_DEV_QD65XX
1481                        case -12: /* "qd65xx" */
1482                                probe_qd65xx = 1;
1483                                goto done;
1484#endif
1485#ifdef CONFIG_BLK_DEV_4DRIVES
1486                        case -11: /* "four" drives on one set of ports */
1487                        {
1488                                ide_hwif_t *mate = &ide_hwifs[hw^1];
1489                                mate->drives[0].select.all ^= 0x20;
1490                                mate->drives[1].select.all ^= 0x20;
1491                                hwif->chipset = mate->chipset = ide_4drives;
1492                                mate->irq = hwif->irq;
1493                                memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1494                                hwif->mate = mate;
1495                                mate->mate = hwif;
1496                                hwif->serialized = mate->serialized = 1;
1497                                goto obsolete_option;
1498                        }
1499#endif /* CONFIG_BLK_DEV_4DRIVES */
1500                        case -10: /* minus10 */
1501                        case -9: /* minus9 */
1502                        case -8: /* minus8 */
1503                        case -6:
1504                        case -4:
1505                        case -3:
1506                                goto bad_option;
1507                        case -7: /* ata66 */
1508#ifdef CONFIG_BLK_DEV_IDEPCI
1509                                /*
1510                                 * Use ATA_CBL_PATA40_SHORT so drive side
1511                                 * cable detection is also overriden.
1512                                 */
1513                                hwif->cbl = ATA_CBL_PATA40_SHORT;
1514                                goto obsolete_option;
1515#else
1516                                goto bad_hwif;
1517#endif
1518                        case -5: /* "reset" */
1519                                hwif->reset = 1;
1520                                goto obsolete_option;
1521                        case -2: /* "serialize" */
1522                                hwif->mate = &ide_hwifs[hw^1];
1523                                hwif->mate->mate = hwif;
1524                                hwif->serialized = hwif->mate->serialized = 1;
1525                                goto obsolete_option;
1526
1527                        case -1: /* "noprobe" */
1528                                hwif->noprobe = 1;
1529                                goto done;
1530
1531                        case 1: /* base */
1532                                vals[1] = vals[0] + 0x206; /* default ctl */
1533                        case 2: /* base,ctl */
1534                                vals[2] = 0;    /* default irq = probe for it */
1535                        case 3: /* base,ctl,irq */
1536                                memset(&hwregs, 0, sizeof(hwregs));
1537                                ide_init_hwif_ports(&hwregs, vals[0], vals[1], &hwif->irq);
1538                                memcpy(hwif->io_ports, hwregs.io_ports, sizeof(hwif->io_ports));
1539                                hwif->irq      = vals[2];
1540                                hwif->noprobe  = 0;
1541                                hwif->chipset  = ide_forced;
1542                                goto obsolete_option;
1543
1544                        case 0: goto bad_option;
1545                        default:
1546                                printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1547                                return 1;
1548                }
1549        }
1550bad_option:
1551        printk(" -- BAD OPTION\n");
1552        return 1;
1553obsolete_option:
1554        printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1555        return 1;
1556bad_hwif:
1557        printk("-- NOT SUPPORTED ON ide%d", hw);
1558done:
1559        printk("\n");
1560        return 1;
1561}
1562
1563extern void __init pnpide_init(void);
1564extern void __exit pnpide_exit(void);
1565extern void __init h8300_ide_init(void);
1566
1567/*
1568 * probe_for_hwifs() finds/initializes "known" IDE interfaces
1569 */
1570static void __init probe_for_hwifs (void)
1571{
1572#ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1573        ide_scan_pcibus(ide_scan_direction);
1574#endif
1575
1576#ifdef CONFIG_ETRAX_IDE
1577        {
1578                extern void init_e100_ide(void);
1579                init_e100_ide();
1580        }
1581#endif /* CONFIG_ETRAX_IDE */
1582#ifdef CONFIG_BLK_DEV_CMD640
1583        {
1584                extern void ide_probe_for_cmd640x(void);
1585                ide_probe_for_cmd640x();
1586        }
1587#endif /* CONFIG_BLK_DEV_CMD640 */
1588#ifdef CONFIG_BLK_DEV_IDE_PMAC
1589        {
1590                extern int pmac_ide_probe(void);
1591                (void)pmac_ide_probe();
1592        }
1593#endif /* CONFIG_BLK_DEV_IDE_PMAC */
1594#ifdef CONFIG_BLK_DEV_GAYLE
1595        {
1596                extern void gayle_init(void);
1597                gayle_init();
1598        }
1599#endif /* CONFIG_BLK_DEV_GAYLE */
1600#ifdef CONFIG_BLK_DEV_FALCON_IDE
1601        {
1602                extern void falconide_init(void);
1603                falconide_init();
1604        }
1605#endif /* CONFIG_BLK_DEV_FALCON_IDE */
1606#ifdef CONFIG_BLK_DEV_MAC_IDE
1607        {
1608                extern void macide_init(void);
1609                macide_init();
1610        }
1611#endif /* CONFIG_BLK_DEV_MAC_IDE */
1612#ifdef CONFIG_BLK_DEV_Q40IDE
1613        {
1614                extern void q40ide_init(void);
1615                q40ide_init();
1616        }
1617#endif /* CONFIG_BLK_DEV_Q40IDE */
1618#ifdef CONFIG_BLK_DEV_BUDDHA
1619        {
1620                extern void buddha_init(void);
1621                buddha_init();
1622        }
1623#endif /* CONFIG_BLK_DEV_BUDDHA */
1624#ifdef CONFIG_BLK_DEV_IDEPNP
1625        pnpide_init();
1626#endif
1627#ifdef CONFIG_H8300
1628        h8300_ide_init();
1629#endif
1630}
1631
1632/*
1633 * Probe module
1634 */
1635
1636EXPORT_SYMBOL(ide_lock);
1637
1638static int ide_bus_match(struct device *dev, struct device_driver *drv)
1639{
1640        return 1;
1641}
1642
1643static char *media_string(ide_drive_t *drive)
1644{
1645        switch (drive->media) {
1646        case ide_disk:
1647                return "disk";
1648        case ide_cdrom:
1649                return "cdrom";
1650        case ide_tape:
1651                return "tape";
1652        case ide_floppy:
1653                return "floppy";
1654        case ide_optical:
1655                return "optical";
1656        default:
1657                return "UNKNOWN";
1658        }
1659}
1660
1661static ssize_t media_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", media_string(drive));
1665}
1666
1667static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1668{
1669        ide_drive_t *drive = to_ide_device(dev);
1670        return sprintf(buf, "%s\n", drive->name);
1671}
1672
1673static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1674{
1675        ide_drive_t *drive = to_ide_device(dev);
1676        return sprintf(buf, "ide:m-%s\n", media_string(drive));
1677}
1678
1679static ssize_t model_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->model);
1684}
1685
1686static ssize_t firmware_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->fw_rev);
1691}
1692
1693static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
1694                           char *buf)
1695{
1696        ide_drive_t *drive = to_ide_device(dev);
1697        return sprintf(buf, "%s\n", drive->id->serial_no);
1698}
1699
1700static struct device_attribute ide_dev_attrs[] = {
1701        __ATTR_RO(media),
1702        __ATTR_RO(drivename),
1703        __ATTR_RO(modalias),
1704        __ATTR_RO(model),
1705        __ATTR_RO(firmware),
1706        __ATTR(serial, 0400, serial_show, NULL),
1707        __ATTR_NULL
1708};
1709
1710static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
1711{
1712        ide_drive_t *drive = to_ide_device(dev);
1713
1714        add_uevent_var(env, "MEDIA=%s", media_string(drive));
1715        add_uevent_var(env, "DRIVENAME=%s", drive->name);
1716        add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
1717        return 0;
1718}
1719
1720static int generic_ide_probe(struct device *dev)
1721{
1722        ide_drive_t *drive = to_ide_device(dev);
1723        ide_driver_t *drv = to_ide_driver(dev->driver);
1724
1725        return drv->probe ? drv->probe(drive) : -ENODEV;
1726}
1727
1728static int generic_ide_remove(struct device *dev)
1729{
1730        ide_drive_t *drive = to_ide_device(dev);
1731        ide_driver_t *drv = to_ide_driver(dev->driver);
1732
1733        if (drv->remove)
1734                drv->remove(drive);
1735
1736        return 0;
1737}
1738
1739static void generic_ide_shutdown(struct device *dev)
1740{
1741        ide_drive_t *drive = to_ide_device(dev);
1742        ide_driver_t *drv = to_ide_driver(dev->driver);
1743
1744        if (dev->driver && drv->shutdown)
1745                drv->shutdown(drive);
1746}
1747
1748struct bus_type ide_bus_type = {
1749        .name           = "ide",
1750        .match          = ide_bus_match,
1751        .uevent         = ide_uevent,
1752        .probe          = generic_ide_probe,
1753        .remove         = generic_ide_remove,
1754        .shutdown       = generic_ide_shutdown,
1755        .dev_attrs      = ide_dev_attrs,
1756        .suspend        = generic_ide_suspend,
1757        .resume         = generic_ide_resume,
1758};
1759
1760EXPORT_SYMBOL_GPL(ide_bus_type);
1761
1762/*
1763 * This is gets invoked once during initialization, to set *everything* up
1764 */
1765static int __init ide_init(void)
1766{
1767        int ret;
1768
1769        printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
1770        system_bus_speed = ide_system_bus_speed();
1771
1772        ret = bus_register(&ide_bus_type);
1773        if (ret < 0) {
1774                printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1775                return ret;
1776        }
1777
1778        init_ide_data();
1779
1780        proc_ide_create();
1781
1782#ifdef CONFIG_BLK_DEV_ALI14XX
1783        if (probe_ali14xx)
1784                (void)ali14xx_init();
1785#endif
1786#ifdef CONFIG_BLK_DEV_UMC8672
1787        if (probe_umc8672)
1788                (void)umc8672_init();
1789#endif
1790#ifdef CONFIG_BLK_DEV_DTC2278
1791        if (probe_dtc2278)
1792                (void)dtc2278_init();
1793#endif
1794#ifdef CONFIG_BLK_DEV_HT6560B
1795        if (probe_ht6560b)
1796                (void)ht6560b_init();
1797#endif
1798#ifdef CONFIG_BLK_DEV_QD65XX
1799        if (probe_qd65xx)
1800                (void)qd65xx_init();
1801#endif
1802
1803        /* Probe for special PCI and other "known" interface chipsets. */
1804        probe_for_hwifs();
1805
1806        return 0;
1807}
1808
1809#ifdef MODULE
1810static char *options = NULL;
1811module_param(options, charp, 0);
1812MODULE_LICENSE("GPL");
1813
1814static void __init parse_options (char *line)
1815{
1816        char *next = line;
1817
1818        if (line == NULL || !*line)
1819                return;
1820        while ((line = next) != NULL) {
1821                if ((next = strchr(line,' ')) != NULL)
1822                        *next++ = 0;
1823                if (!ide_setup(line))
1824                        printk (KERN_INFO "Unknown option '%s'\n", line);
1825        }
1826}
1827
1828int __init init_module (void)
1829{
1830        parse_options(options);
1831        return ide_init();
1832}
1833
1834void __exit cleanup_module (void)
1835{
1836        int index;
1837
1838        for (index = 0; index < MAX_HWIFS; ++index)
1839                ide_unregister(index);
1840
1841#ifdef CONFIG_BLK_DEV_IDEPNP
1842        pnpide_exit();
1843#endif
1844
1845        proc_ide_destroy();
1846
1847        bus_unregister(&ide_bus_type);
1848}
1849
1850#else /* !MODULE */
1851
1852__setup("", ide_setup);
1853
1854module_init(ide_init);
1855
1856#endif /* MODULE */
1857
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