drivers/ide/ide.c

   1 /*
   2  *  linux/drivers/ide/ide.c             Version 7.00beta2       Mar 05 2003
   3  *
   4  *  Copyright (C) 1994-1998  Linus Torvalds & authors (see below)
   5  */
   6
   7 /*
   8  *  Mostly written by Mark Lord  <mlord@pobox.com>
   9  *                and Gadi Oxman <gadio@netvision.net.il>
  10  *                and Andre Hedrick <andre@linux-ide.org>
  11  *
  12  *  See linux/MAINTAINERS for address of current maintainer.
  13  *
  14  * This is the multiple IDE interface driver, as evolved from hd.c.
  15  * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs
  16  *   (usually 14 & 15).
  17  * There can be up to two drives per interface, as per the ATA-2 spec.
  18  *
  19  * Primary:    ide0, port 0x1f0; major=3;  hda is minor=0; hdb is minor=64
  20  * Secondary:  ide1, port 0x170; major=22; hdc is minor=0; hdd is minor=64
  21  * Tertiary:   ide2, port 0x???; major=33; hde is minor=0; hdf is minor=64
  22  * Quaternary: ide3, port 0x???; major=34; hdg is minor=0; hdh is minor=64
  23  * ...
  24  *
  25  *  From hd.c:
  26  *  |
  27  *  | It traverses the request-list, using interrupts to jump between functions.
  28  *  | As nearly all functions can be called within interrupts, we may not sleep.
  29  *  | Special care is recommended.  Have Fun!
  30  *  |
  31  *  | modified by Drew Eckhardt to check nr of hd's from the CMOS.
  32  *  |
  33  *  | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
  34  *  | in the early extended-partition checks and added DM partitions.
  35  *  |
  36  *  | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
  37  *  |
  38  *  | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
  39  *  | and general streamlining by Mark Lord (mlord@pobox.com).
  40  *
  41  *  October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
  42  *
  43  *      Mark Lord       (mlord@pobox.com)               (IDE Perf.Pkg)
  44  *      Delman Lee      (delman@ieee.org)               ("Mr. atdisk2")
  45  *      Scott Snyder    (snyder@fnald0.fnal.gov)        (ATAPI IDE cd-rom)
  46  *
  47  *  This was a rewrite of just about everything from hd.c, though some original
  48  *  code is still sprinkled about.  Think of it as a major evolution, with
  49  *  inspiration from lots of linux users, esp.  hamish@zot.apana.org.au
  50  *
  51  *  Version 1.0 ALPHA   initial code, primary i/f working okay
  52  *  Version 1.3 BETA    dual i/f on shared irq tested & working!
  53  *  Version 1.4 BETA    added auto probing for irq(s)
  54  *  Version 1.5 BETA    added ALPHA (untested) support for IDE cd-roms,
  55  *  ...
  56  * Version 5.50         allow values as small as 20 for idebus=
  57  * Version 5.51         force non io_32bit in drive_cmd_intr()
  58  *                      change delay_10ms() to delay_50ms() to fix problems
  59  * Version 5.52         fix incorrect invalidation of removable devices
  60  *                      add "hdx=slow" command line option
  61  * Version 5.60         start to modularize the driver; the disk and ATAPI
  62  *                       drivers can be compiled as loadable modules.
  63  *                      move IDE probe code to ide-probe.c
  64  *                      move IDE disk code to ide-disk.c
  65  *                      add support for generic IDE device subdrivers
  66  *                      add m68k code from Geert Uytterhoeven
  67  *                      probe all interfaces by default
  68  *                      add ioctl to (re)probe an interface
  69  * Version 6.00         use per device request queues
  70  *                      attempt to optimize shared hwgroup performance
  71  *                      add ioctl to manually adjust bandwidth algorithms
  72  *                      add kerneld support for the probe module
  73  *                      fix bug in ide_error()
  74  *                      fix bug in the first ide_get_lock() call for Atari
  75  *                      don't flush leftover data for ATAPI devices
  76  * Version 6.01         clear hwgroup->active while the hwgroup sleeps
  77  *                      support HDIO_GETGEO for floppies
  78  * Version 6.02         fix ide_ack_intr() call
  79  *                      check partition table on floppies
  80  * Version 6.03         handle bad status bit sequencing in ide_wait_stat()
  81  * Version 6.10         deleted old entries from this list of updates
  82  *                      replaced triton.c with ide-dma.c generic PCI DMA
  83  *                      added support for BIOS-enabled UltraDMA
  84  *                      rename all "promise" things to "pdc4030"
  85  *                      fix EZ-DRIVE handling on small disks
  86  * Version 6.11         fix probe error in ide_scan_devices()
  87  *                      fix ancient "jiffies" polling bugs
  88  *                      mask all hwgroup interrupts on each irq entry
  89  * Version 6.12         integrate ioctl and proc interfaces
  90  *                      fix parsing of "idex=" command line parameter
  91  * Version 6.13         add support for ide4/ide5 courtesy rjones@orchestream.com
  92  * Version 6.14         fixed IRQ sharing among PCI devices
  93  * Version 6.15         added SMP awareness to IDE drivers
  94  * Version 6.16         fixed various bugs; even more SMP friendly
  95  * Version 6.17         fix for newest EZ-Drive problem
  96  * Version 6.18         default unpartitioned-disk translation now "BIOS LBA"
  97  * Version 6.19         Re-design for a UNIFORM driver for all platforms,
  98  *                        model based on suggestions from Russell King and
  99  *                        Geert Uytterhoeven
 100  *                      Promise DC4030VL now supported.
 101  *                      add support for ide6/ide7
 102  *                      delay_50ms() changed to ide_delay_50ms() and exported.
 103  * Version 6.20         Added/Fixed Generic ATA-66 support and hwif detection.
 104  *                      Added hdx=flash to allow for second flash disk
 105  *                        detection w/o the hang loop.
 106  *                      Added support for ide8/ide9
 107  *                      Added idex=ata66 for the quirky chipsets that are
 108  *                        ATA-66 compliant, but have yet to determine a method
 109  *                        of verification of the 80c cable presence.
 110  *                        Specifically Promise's PDC20262 chipset.
 111  * Version 6.21         Fixing/Fixed SMP spinlock issue with insight from an old
 112  *                        hat that clarified original low level driver design.
 113  * Version 6.30         Added SMP support; fixed multmode issues.  -ml
 114  * Version 6.31         Debug Share INTR's and request queue streaming
 115  *                      Native ATA-100 support
 116  *                      Prep for Cascades Project
 117  * Version 7.00alpha    First named revision of ide rearrange
 118  *
 119  *  Some additional driver compile-time options are in ./include/linux/ide.h
 120  *
 121  *  To do, in likely order of completion:
 122  *      - modify kernel to obtain BIOS geometry for drives on 2nd/3rd/4th i/f
 123  *
 124  */
 125
 126 #define REVISION        "Revision: 7.00alpha2"
 127 #define VERSION         "Id: ide.c 7.00a2 20020906"
 128
 129 #define _IDE_C                  /* Tell ide.h it's really us */
 130
 131 #include <linux/module.h>
 132 #include <linux/types.h>
 133 #include <linux/string.h>
 134 #include <linux/kernel.h>
 135 #include <linux/timer.h>
 136 #include <linux/mm.h>
 137 #include <linux/interrupt.h>
 138 #include <linux/major.h>
 139 #include <linux/errno.h>
 140 #include <linux/genhd.h>
 141 #include <linux/blkpg.h>
 142 #include <linux/slab.h>
 143 #include <linux/init.h>
 144 #include <linux/pci.h>
 145 #include <linux/delay.h>
 146 #include <linux/ide.h>
 147 #include <linux/completion.h>
 148 #include <linux/reboot.h>
 149 #include <linux/cdrom.h>
 150 #include <linux/seq_file.h>
 151 #include <linux/device.h>
 152 #include <linux/bitops.h>
 153
 154 #include <asm/byteorder.h>
 155 #include <asm/irq.h>
 156 #include <asm/uaccess.h>
 157 #include <asm/io.h>
 158
 159
 160 /* default maximum number of failures */
 161 #define IDE_DEFAULT_MAX_FAILURES        1
 162
 163 static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
 164                                         IDE2_MAJOR, IDE3_MAJOR,
 165                                         IDE4_MAJOR, IDE5_MAJOR,
 166                                         IDE6_MAJOR, IDE7_MAJOR,
 167                                         IDE8_MAJOR, IDE9_MAJOR };
 168
 169 static int idebus_parameter;    /* holds the "idebus=" parameter */
 170 static int system_bus_speed;    /* holds what we think is VESA/PCI bus speed */
 171 static int initializing;        /* set while initializing built-in drivers */
 172
 173 DECLARE_MUTEX(ide_cfg_sem);
 174  __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
 175
 176 #ifdef CONFIG_BLK_DEV_IDEPCI
 177 static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
 178 #endif
 179
 180 int noautodma = 0;
 181
 182 EXPORT_SYMBOL(noautodma);
 183
 184 #ifdef CONFIG_BLK_DEV_IDEACPI
 185 int ide_noacpi = 0;
 186 int ide_noacpitfs = 1;
 187 int ide_noacpionboot = 1;
 188 #endif
 189
 190 /*
 191  * This is declared extern in ide.h, for access by other IDE modules:
 192  */
 193 ide_hwif_t ide_hwifs[MAX_HWIFS];        /* master data repository */
 194
 195 EXPORT_SYMBOL(ide_hwifs);
 196
 197 /*
 198  * Do not even *think* about calling this!
 199  */
 200 static void init_hwif_data(ide_hwif_t *hwif, unsigned int index)
 201 {
 202         unsigned int unit;
 203
 204         /* bulk initialize hwif & drive info with zeros */
 205         memset(hwif, 0, sizeof(ide_hwif_t));
 206
 207         /* fill in any non-zero initial values */
 208         hwif->index     = index;
 209         hwif->major     = ide_hwif_to_major[index];
 210
 211         hwif->name[0]   = 'i';
 212         hwif->name[1]   = 'd';
 213         hwif->name[2]   = 'e';
 214         hwif->name[3]   = '0' + index;
 215
 216         hwif->bus_state = BUSSTATE_ON;
 217
 218         hwif->atapi_dma = 0;            /* disable all atapi dma */
 219
 220         init_completion(&hwif->gendev_rel_comp);
 221
 222         default_hwif_iops(hwif);
 223         default_hwif_transport(hwif);
 224         for (unit = 0; unit < MAX_DRIVES; ++unit) {
 225                 ide_drive_t *drive = &hwif->drives[unit];
 226
 227                 drive->media                    = ide_disk;
 228                 drive->select.all               = (unit<<4)|0xa0;
 229                 drive->hwif                     = hwif;
 230                 drive->ctl                      = 0x08;
 231                 drive->ready_stat               = READY_STAT;
 232                 drive->bad_wstat                = BAD_W_STAT;
 233                 drive->special.b.recalibrate    = 1;
 234                 drive->special.b.set_geometry   = 1;
 235                 drive->name[0]                  = 'h';
 236                 drive->name[1]                  = 'd';
 237                 drive->name[2]                  = 'a' + (index * MAX_DRIVES) + unit;
 238                 drive->max_failures             = IDE_DEFAULT_MAX_FAILURES;
 239                 drive->using_dma                = 0;
 240                 drive->vdma                     = 0;
 241                 INIT_LIST_HEAD(&drive->list);
 242                 init_completion(&drive->gendev_rel_comp);
 243         }
 244 }
 245
 246 static void init_hwif_default(ide_hwif_t *hwif, unsigned int index)
 247 {
 248         hw_regs_t hw;
 249
 250         memset(&hw, 0, sizeof(hw_regs_t));
 251
 252         ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq);
 253
 254         memcpy(&hwif->hw, &hw, sizeof(hw));
 255         memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
 256
 257         hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
 258 #ifdef CONFIG_BLK_DEV_HD
 259         if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA)
 260                 hwif->noprobe = 1;      /* may be overridden by ide_setup() */
 261 #endif
 262 }
 263
 264 extern void ide_arm_init(void);
 265
 266 /*
 267  * init_ide_data() sets reasonable default values into all fields
 268  * of all instances of the hwifs and drives, but only on the first call.
 269  * Subsequent calls have no effect (they don't wipe out anything).
 270  *
 271  * This routine is normally called at driver initialization time,
 272  * but may also be called MUCH earlier during kernel "command-line"
 273  * parameter processing.  As such, we cannot depend on any other parts
 274  * of the kernel (such as memory allocation) to be functioning yet.
 275  *
 276  * This is too bad, as otherwise we could dynamically allocate the
 277  * ide_drive_t structs as needed, rather than always consuming memory
 278  * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
 279  *
 280  * FIXME: We should stuff the setup data into __init and copy the
 281  * relevant hwifs/allocate them properly during boot.
 282  */
 283 #define MAGIC_COOKIE 0x12345678
 284 static void __init init_ide_data (void)
 285 {
 286         ide_hwif_t *hwif;
 287         unsigned int index;
 288         static unsigned long magic_cookie = MAGIC_COOKIE;
 289
 290         if (magic_cookie != MAGIC_COOKIE)
 291                 return;         /* already initialized */
 292         magic_cookie = 0;
 293
 294         /* Initialise all interface structures */
 295         for (index = 0; index < MAX_HWIFS; ++index) {
 296                 hwif = &ide_hwifs[index];
 297                 init_hwif_data(hwif, index);
 298                 init_hwif_default(hwif, index);
 299 #if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
 300                 hwif->irq = hwif->hw.irq =
 301                         ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
 302 #endif
 303         }
 304 #ifdef CONFIG_IDE_ARM
 305         initializing = 1;
 306         ide_arm_init();
 307         initializing = 0;
 308 #endif
 309 }
 310
 311 /**
 312  *      ide_system_bus_speed    -       guess bus speed
 313  *
 314  *      ide_system_bus_speed() returns what we think is the system VESA/PCI
 315  *      bus speed (in MHz). This is used for calculating interface PIO timings.
 316  *      The default is 40 for known PCI systems, 50 otherwise.
 317  *      The "idebus=xx" parameter can be used to override this value.
 318  *      The actual value to be used is computed/displayed the first time
 319  *      through. Drivers should only use this as a last resort.
 320  *
 321  *      Returns a guessed speed in MHz.
 322  */
 323
 324 static int ide_system_bus_speed(void)
 325 {
 326 #ifdef CONFIG_PCI
 327         static struct pci_device_id pci_default[] = {
 328                 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
 329                 { }
 330         };
 331 #else
 332 #define pci_default 0
 333 #endif /* CONFIG_PCI */
 334
 335         if (!system_bus_speed) {
 336                 if (idebus_parameter) {
 337                         /* user supplied value */
 338                         system_bus_speed = idebus_parameter;
 339                 } else if (pci_dev_present(pci_default)) {
 340                         /* safe default value for PCI */
 341                         system_bus_speed = 33;
 342                 } else {
 343                         /* safe default value for VESA and PCI */
 344                         system_bus_speed = 50;
 345                 }
 346                 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
 347                         "for PIO modes%s\n", system_bus_speed,
 348                         idebus_parameter ? "" : "; override with idebus=xx");
 349         }
 350         return system_bus_speed;
 351 }
 352
 353 #ifdef CONFIG_IDE_PROC_FS
 354 struct proc_dir_entry *proc_ide_root;
 355 #endif
 356
 357 static struct resource* hwif_request_region(ide_hwif_t *hwif,
 358                                             unsigned long addr, int num)
 359 {
 360         struct resource *res = request_region(addr, num, hwif->name);
 361
 362         if (!res)
 363                 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
 364                                 hwif->name, addr, addr+num-1);
 365         return res;
 366 }
 367
 368 /**
 369  *      ide_hwif_request_regions - request resources for IDE
 370  *      @hwif: interface to use
 371  *
 372  *      Requests all the needed resources for an interface.
 373  *      Right now core IDE code does this work which is deeply wrong.
 374  *      MMIO leaves it to the controller driver,
 375  *      PIO will migrate this way over time.
 376  */
 377
 378 int ide_hwif_request_regions(ide_hwif_t *hwif)
 379 {
 380         unsigned long addr;
 381         unsigned int i;
 382
 383         if (hwif->mmio)
 384                 return 0;
 385         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
 386         if (addr && !hwif_request_region(hwif, addr, 1))
 387                 goto control_region_busy;
 388         hwif->straight8 = 0;
 389         addr = hwif->io_ports[IDE_DATA_OFFSET];
 390         if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
 391                 if (!hwif_request_region(hwif, addr, 8))
 392                         goto data_region_busy;
 393                 hwif->straight8 = 1;
 394                 return 0;
 395         }
 396         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
 397                 addr = hwif->io_ports[i];
 398                 if (!hwif_request_region(hwif, addr, 1)) {
 399                         while (--i)
 400                                 release_region(addr, 1);
 401                         goto data_region_busy;
 402                 }
 403         }
 404         return 0;
 405
 406 data_region_busy:
 407         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
 408         if (addr)
 409                 release_region(addr, 1);
 410 control_region_busy:
 411         /* If any errors are return, we drop the hwif interface. */
 412         return -EBUSY;
 413 }
 414
 415 /**
 416  *      ide_hwif_release_regions - free IDE resources
 417  *
 418  *      Note that we only release the standard ports,
 419  *      and do not even try to handle any extra ports
 420  *      allocated for weird IDE interface chipsets.
 421  *
 422  *      Note also that we don't yet handle mmio resources here. More
 423  *      importantly our caller should be doing this so we need to
 424  *      restructure this as a helper function for drivers.
 425  */
 426
 427 void ide_hwif_release_regions(ide_hwif_t *hwif)
 428 {
 429         u32 i = 0;
 430
 431         if (hwif->mmio)
 432                 return;
 433         if (hwif->io_ports[IDE_CONTROL_OFFSET])
 434                 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
 435         if (hwif->straight8) {
 436                 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
 437                 return;
 438         }
 439         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
 440                 if (hwif->io_ports[i])
 441                         release_region(hwif->io_ports[i], 1);
 442 }
 443
 444 /**
 445  *      ide_hwif_restore        -       restore hwif to template
 446  *      @hwif: hwif to update
 447  *      @tmp_hwif: template
 448  *
 449  *      Restore hwif to a previous state by copying most settings
 450  *      from the template.
 451  */
 452
 453 static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
 454 {
 455         hwif->hwgroup                   = tmp_hwif->hwgroup;
 456
 457         hwif->gendev.parent             = tmp_hwif->gendev.parent;
 458
 459         hwif->proc                      = tmp_hwif->proc;
 460
 461         hwif->major                     = tmp_hwif->major;
 462         hwif->straight8                 = tmp_hwif->straight8;
 463         hwif->bus_state                 = tmp_hwif->bus_state;
 464
 465         hwif->atapi_dma                 = tmp_hwif->atapi_dma;
 466         hwif->ultra_mask                = tmp_hwif->ultra_mask;
 467         hwif->mwdma_mask                = tmp_hwif->mwdma_mask;
 468         hwif->swdma_mask                = tmp_hwif->swdma_mask;
 469
 470         hwif->chipset                   = tmp_hwif->chipset;
 471         hwif->hold                      = tmp_hwif->hold;
 472
 473 #ifdef CONFIG_BLK_DEV_IDEPCI
 474         hwif->pci_dev                   = tmp_hwif->pci_dev;
 475         hwif->cds                       = tmp_hwif->cds;
 476 #endif
 477
 478         hwif->tuneproc                  = tmp_hwif->tuneproc;
 479         hwif->speedproc                 = tmp_hwif->speedproc;
 480         hwif->udma_filter               = tmp_hwif->udma_filter;
 481         hwif->selectproc                = tmp_hwif->selectproc;
 482         hwif->reset_poll                = tmp_hwif->reset_poll;
 483         hwif->pre_reset                 = tmp_hwif->pre_reset;
 484         hwif->resetproc                 = tmp_hwif->resetproc;
 485         hwif->intrproc                  = tmp_hwif->intrproc;
 486         hwif->maskproc                  = tmp_hwif->maskproc;
 487         hwif->quirkproc                 = tmp_hwif->quirkproc;
 488         hwif->busproc                   = tmp_hwif->busproc;
 489
 490         hwif->ata_input_data            = tmp_hwif->ata_input_data;
 491         hwif->ata_output_data           = tmp_hwif->ata_output_data;
 492         hwif->atapi_input_bytes         = tmp_hwif->atapi_input_bytes;
 493         hwif->atapi_output_bytes        = tmp_hwif->atapi_output_bytes;
 494
 495         hwif->dma_setup                 = tmp_hwif->dma_setup;
 496         hwif->dma_exec_cmd              = tmp_hwif->dma_exec_cmd;
 497         hwif->dma_start                 = tmp_hwif->dma_start;
 498         hwif->ide_dma_end               = tmp_hwif->ide_dma_end;
 499         hwif->ide_dma_check             = tmp_hwif->ide_dma_check;
 500         hwif->ide_dma_on                = tmp_hwif->ide_dma_on;
 501         hwif->dma_off_quietly           = tmp_hwif->dma_off_quietly;
 502         hwif->ide_dma_test_irq          = tmp_hwif->ide_dma_test_irq;
 503         hwif->ide_dma_clear_irq         = tmp_hwif->ide_dma_clear_irq;
 504         hwif->dma_host_on               = tmp_hwif->dma_host_on;
 505         hwif->dma_host_off              = tmp_hwif->dma_host_off;
 506         hwif->ide_dma_lostirq           = tmp_hwif->ide_dma_lostirq;
 507         hwif->ide_dma_timeout           = tmp_hwif->ide_dma_timeout;
 508
 509         hwif->OUTB                      = tmp_hwif->OUTB;
 510         hwif->OUTBSYNC                  = tmp_hwif->OUTBSYNC;
 511         hwif->OUTW                      = tmp_hwif->OUTW;
 512         hwif->OUTSW                     = tmp_hwif->OUTSW;
 513         hwif->OUTSL                     = tmp_hwif->OUTSL;
 514
 515         hwif->INB                       = tmp_hwif->INB;
 516         hwif->INW                       = tmp_hwif->INW;
 517         hwif->INSW                      = tmp_hwif->INSW;
 518         hwif->INSL                      = tmp_hwif->INSL;
 519
 520         hwif->sg_max_nents              = tmp_hwif->sg_max_nents;
 521
 522         hwif->mmio                      = tmp_hwif->mmio;
 523         hwif->rqsize                    = tmp_hwif->rqsize;
 524         hwif->no_lba48                  = tmp_hwif->no_lba48;
 525
 526 #ifndef CONFIG_BLK_DEV_IDECS
 527         hwif->irq                       = tmp_hwif->irq;
 528 #endif
 529
 530         hwif->dma_base                  = tmp_hwif->dma_base;
 531         hwif->dma_master                = tmp_hwif->dma_master;
 532         hwif->dma_command               = tmp_hwif->dma_command;
 533         hwif->dma_vendor1               = tmp_hwif->dma_vendor1;
 534         hwif->dma_status                = tmp_hwif->dma_status;
 535         hwif->dma_vendor3               = tmp_hwif->dma_vendor3;
 536         hwif->dma_prdtable              = tmp_hwif->dma_prdtable;
 537
 538         hwif->config_data               = tmp_hwif->config_data;
 539         hwif->select_data               = tmp_hwif->select_data;
 540         hwif->extra_base                = tmp_hwif->extra_base;
 541         hwif->extra_ports               = tmp_hwif->extra_ports;
 542         hwif->autodma                   = tmp_hwif->autodma;
 543         hwif->udma_four                 = tmp_hwif->udma_four;
 544
 545         hwif->hwif_data                 = tmp_hwif->hwif_data;
 546 }
 547
 548 /**
 549  *      ide_unregister          -       free an IDE interface
 550  *      @index: index of interface (will change soon to a pointer)
 551  *
 552  *      Perform the final unregister of an IDE interface. At the moment
 553  *      we don't refcount interfaces so this will also get split up.
 554  *
 555  *      Locking:
 556  *      The caller must not hold the IDE locks
 557  *      The drive present/vanishing is not yet properly locked
 558  *      Take care with the callbacks. These have been split to avoid
 559  *      deadlocking the IDE layer. The shutdown callback is called
 560  *      before we take the lock and free resources. It is up to the
 561  *      caller to be sure there is no pending I/O here, and that
 562  *      the interface will not be reopened (present/vanishing locking
 563  *      isn't yet done BTW). After we commit to the final kill we
 564  *      call the cleanup callback with the ide locks held.
 565  *
 566  *      Unregister restores the hwif structures to the default state.
 567  *      This is raving bonkers.
 568  */
 569
 570 void ide_unregister(unsigned int index)
 571 {
 572         ide_drive_t *drive;
 573         ide_hwif_t *hwif, *g;
 574         static ide_hwif_t tmp_hwif; /* protected by ide_cfg_sem */
 575         ide_hwgroup_t *hwgroup;
 576         int irq_count = 0, unit;
 577
 578         BUG_ON(index >= MAX_HWIFS);
 579
 580         BUG_ON(in_interrupt());
 581         BUG_ON(irqs_disabled());
 582         down(&ide_cfg_sem);
 583         spin_lock_irq(&ide_lock);
 584         hwif = &ide_hwifs[index];
 585         if (!hwif->present)
 586                 goto abort;
 587         for (unit = 0; unit < MAX_DRIVES; ++unit) {
 588                 drive = &hwif->drives[unit];
 589                 if (!drive->present)
 590                         continue;
 591                 spin_unlock_irq(&ide_lock);
 592                 device_unregister(&drive->gendev);
 593                 wait_for_completion(&drive->gendev_rel_comp);
 594                 spin_lock_irq(&ide_lock);
 595         }
 596         hwif->present = 0;
 597
 598         spin_unlock_irq(&ide_lock);
 599
 600         destroy_proc_ide_interface(hwif);
 601
 602         hwgroup = hwif->hwgroup;
 603         /*
 604          * free the irq if we were the only hwif using it
 605          */
 606         g = hwgroup->hwif;
 607         do {
 608                 if (g->irq == hwif->irq)
 609                         ++irq_count;
 610                 g = g->next;
 611         } while (g != hwgroup->hwif);
 612         if (irq_count == 1)
 613                 free_irq(hwif->irq, hwgroup);
 614
 615         spin_lock_irq(&ide_lock);
 616         /*
 617          * Note that we only release the standard ports,
 618          * and do not even try to handle any extra ports
 619          * allocated for weird IDE interface chipsets.
 620          */
 621         ide_hwif_release_regions(hwif);
 622
 623         /*
 624          * Remove us from the hwgroup, and free
 625          * the hwgroup if we were the only member
 626          */
 627         if (hwif->next == hwif) {
 628                 BUG_ON(hwgroup->hwif != hwif);
 629                 kfree(hwgroup);
 630         } else {
 631                 /* There is another interface in hwgroup.
 632                  * Unlink us, and set hwgroup->drive and ->hwif to
 633                  * something sane.
 634                  */
 635                 g = hwgroup->hwif;
 636                 while (g->next != hwif)
 637                         g = g->next;
 638                 g->next = hwif->next;
 639                 if (hwgroup->hwif == hwif) {
 640                         /* Chose a random hwif for hwgroup->hwif.
 641                          * It's guaranteed that there are no drives
 642                          * left in the hwgroup.
 643                          */
 644                         BUG_ON(hwgroup->drive != NULL);
 645                         hwgroup->hwif = g;
 646                 }
 647                 BUG_ON(hwgroup->hwif == hwif);
 648         }
 649
 650         /* More messed up locking ... */
 651         spin_unlock_irq(&ide_lock);
 652         device_unregister(&hwif->gendev);
 653         wait_for_completion(&hwif->gendev_rel_comp);
 654
 655         /*
 656          * Remove us from the kernel's knowledge
 657          */
 658         blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
 659         kfree(hwif->sg_table);
 660         unregister_blkdev(hwif->major, hwif->name);
 661         spin_lock_irq(&ide_lock);
 662
 663         if (hwif->dma_base) {
 664                 (void) ide_release_dma(hwif);
 665
 666                 hwif->dma_base = 0;
 667                 hwif->dma_master = 0;
 668                 hwif->dma_command = 0;
 669                 hwif->dma_vendor1 = 0;
 670                 hwif->dma_status = 0;
 671                 hwif->dma_vendor3 = 0;
 672                 hwif->dma_prdtable = 0;
 673
 674                 hwif->extra_base  = 0;
 675                 hwif->extra_ports = 0;
 676         }
 677
 678         /* copy original settings */
 679         tmp_hwif = *hwif;
 680
 681         /* restore hwif data to pristine status */
 682         init_hwif_data(hwif, index);
 683         init_hwif_default(hwif, index);
 684
 685         ide_hwif_restore(hwif, &tmp_hwif);
 686
 687 abort:
 688         spin_unlock_irq(&ide_lock);
 689         up(&ide_cfg_sem);
 690 }
 691
 692 EXPORT_SYMBOL(ide_unregister);
 693
 694
 695 /**
 696  *      ide_setup_ports         -       set up IDE interface ports
 697  *      @hw: register descriptions
 698  *      @base: base register
 699  *      @offsets: table of register offsets
 700  *      @ctrl: control register
 701  *      @ack_irq: IRQ ack
 702  *      @irq: interrupt lie
 703  *
 704  *      Setup hw_regs_t structure described by parameters.  You
 705  *      may set up the hw structure yourself OR use this routine to
 706  *      do it for you. This is basically a helper
 707  *
 708  */
 709
 710 void ide_setup_ports (  hw_regs_t *hw,
 711                         unsigned long base, int *offsets,
 712                         unsigned long ctrl, unsigned long intr,
 713                         ide_ack_intr_t *ack_intr,
 714 /*
 715  *                      ide_io_ops_t *iops,
 716  */
 717                         int irq)
 718 {
 719         int i;
 720
 721         memset(hw, 0, sizeof(hw_regs_t));
 722         for (i = 0; i < IDE_NR_PORTS; i++) {
 723                 if (offsets[i] == -1) {
 724                         switch(i) {
 725                                 case IDE_CONTROL_OFFSET:
 726                                         hw->io_ports[i] = ctrl;
 727                                         break;
 728 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
 729                                 case IDE_IRQ_OFFSET:
 730                                         hw->io_ports[i] = intr;
 731                                         break;
 732 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
 733                                 default:
 734                                         hw->io_ports[i] = 0;
 735                                         break;
 736                         }
 737                 } else {
 738                         hw->io_ports[i] = base + offsets[i];
 739                 }
 740         }
 741         hw->irq = irq;
 742         hw->dma = NO_DMA;
 743         hw->ack_intr = ack_intr;
 744 /*
 745  *      hw->iops = iops;
 746  */
 747 }
 748
 749 /**
 750  *      ide_register_hw_with_fixup      -       register IDE interface
 751  *      @hw: hardware registers
 752  *      @hwifp: pointer to returned hwif
 753  *      @fixup: fixup function
 754  *
 755  *      Register an IDE interface, specifying exactly the registers etc.
 756  *      Set init=1 iff calling before probes have taken place.
 757  *
 758  *      Returns -1 on error.
 759  */
 760
 761 int ide_register_hw_with_fixup(hw_regs_t *hw, ide_hwif_t **hwifp, void(*fixup)(ide_hwif_t *hwif))
 762 {
 763         int index, retry = 1;
 764         ide_hwif_t *hwif;
 765
 766         do {
 767                 for (index = 0; index < MAX_HWIFS; ++index) {
 768                         hwif = &ide_hwifs[index];
 769                         if (hwif->hw.io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
 770                                 goto found;
 771                 }
 772                 for (index = 0; index < MAX_HWIFS; ++index) {
 773                         hwif = &ide_hwifs[index];
 774                         if (hwif->hold)
 775                                 continue;
 776                         if ((!hwif->present && !hwif->mate && !initializing) ||
 777                             (!hwif->hw.io_ports[IDE_DATA_OFFSET] && initializing))
 778                                 goto found;
 779                 }
 780                 for (index = 0; index < MAX_HWIFS; index++)
 781                         ide_unregister(index);
 782         } while (retry--);
 783         return -1;
 784 found:
 785         if (hwif->present)
 786                 ide_unregister(index);
 787         else if (!hwif->hold) {
 788                 init_hwif_data(hwif, index);
 789                 init_hwif_default(hwif, index);
 790         }
 791         if (hwif->present)
 792                 return -1;
 793         memcpy(&hwif->hw, hw, sizeof(*hw));
 794         memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports));
 795         hwif->irq = hw->irq;
 796         hwif->noprobe = 0;
 797         hwif->chipset = hw->chipset;
 798         hwif->gendev.parent = hw->dev;
 799
 800         if (!initializing) {
 801                 probe_hwif_init_with_fixup(hwif, fixup);
 802                 create_proc_ide_interfaces();
 803         }
 804
 805         if (hwifp)
 806                 *hwifp = hwif;
 807
 808         return (initializing || hwif->present) ? index : -1;
 809 }
 810
 811 EXPORT_SYMBOL(ide_register_hw_with_fixup);
 812
 813 int ide_register_hw(hw_regs_t *hw, ide_hwif_t **hwifp)
 814 {
 815         return ide_register_hw_with_fixup(hw, hwifp, NULL);
 816 }
 817
 818 EXPORT_SYMBOL(ide_register_hw);
 819
 820 /*
 821  *      Locks for IDE setting functionality
 822  */
 823
 824 DECLARE_MUTEX(ide_setting_sem);
 825
 826 EXPORT_SYMBOL_GPL(ide_setting_sem);
 827
 828 /**
 829  *      ide_spin_wait_hwgroup   -       wait for group
 830  *      @drive: drive in the group
 831  *
 832  *      Wait for an IDE device group to go non busy and then return
 833  *      holding the ide_lock which guards the hwgroup->busy status
 834  *      and right to use it.
 835  */
 836
 837 int ide_spin_wait_hwgroup (ide_drive_t *drive)
 838 {
 839         ide_hwgroup_t *hwgroup = HWGROUP(drive);
 840         unsigned long timeout = jiffies + (3 * HZ);
 841
 842         spin_lock_irq(&ide_lock);
 843
 844         while (hwgroup->busy) {
 845                 unsigned long lflags;
 846                 spin_unlock_irq(&ide_lock);
 847                 local_irq_set(lflags);
 848                 if (time_after(jiffies, timeout)) {
 849                         local_irq_restore(lflags);
 850                         printk(KERN_ERR "%s: channel busy\n", drive->name);
 851                         return -EBUSY;
 852                 }
 853                 local_irq_restore(lflags);
 854                 spin_lock_irq(&ide_lock);
 855         }
 856         return 0;
 857 }
 858
 859 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
 860
 861 int set_io_32bit(ide_drive_t *drive, int arg)
 862 {
 863         if (drive->no_io_32bit)
 864                 return -EPERM;
 865
 866         if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
 867                 return -EINVAL;
 868
 869         drive->io_32bit = arg;
 870 #ifdef CONFIG_BLK_DEV_DTC2278
 871         if (HWIF(drive)->chipset == ide_dtc2278)
 872                 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
 873 #endif /* CONFIG_BLK_DEV_DTC2278 */
 874         return 0;
 875 }
 876
 877 static int set_ksettings(ide_drive_t *drive, int arg)
 878 {
 879         if (arg < 0 || arg > 1)
 880                 return -EINVAL;
 881
 882         if (ide_spin_wait_hwgroup(drive))
 883                 return -EBUSY;
 884         drive->keep_settings = arg;
 885         spin_unlock_irq(&ide_lock);
 886
 887         return 0;
 888 }
 889
 890 int set_using_dma(ide_drive_t *drive, int arg)
 891 {
 892 #ifdef CONFIG_BLK_DEV_IDEDMA
 893         ide_hwif_t *hwif = drive->hwif;
 894         int err = -EPERM;
 895
 896         if (arg < 0 || arg > 1)
 897                 return -EINVAL;
 898
 899         if (!drive->id || !(drive->id->capability & 1))
 900                 goto out;
 901
 902         if (hwif->ide_dma_check == NULL)
 903                 goto out;
 904
 905         err = -EBUSY;
 906         if (ide_spin_wait_hwgroup(drive))
 907                 goto out;
 908         /*
 909          * set ->busy flag, unlock and let it ride
 910          */
 911         hwif->hwgroup->busy = 1;
 912         spin_unlock_irq(&ide_lock);
 913
 914         err = 0;
 915
 916         if (arg) {
 917                 if (ide_set_dma(drive) || hwif->ide_dma_on(drive))
 918                         err = -EIO;
 919         } else
 920                 ide_dma_off(drive);
 921
 922         /*
 923          * lock, clear ->busy flag and unlock before leaving
 924          */
 925         spin_lock_irq(&ide_lock);
 926         hwif->hwgroup->busy = 0;
 927         spin_unlock_irq(&ide_lock);
 928 out:
 929         return err;
 930 #else
 931         if (arg < 0 || arg > 1)
 932                 return -EINVAL;
 933
 934         return -EPERM;
 935 #endif
 936 }
 937
 938 int set_pio_mode(ide_drive_t *drive, int arg)
 939 {
 940         struct request rq;
 941
 942         if (arg < 0 || arg > 255)
 943                 return -EINVAL;
 944
 945         if (!HWIF(drive)->tuneproc)
 946                 return -ENOSYS;
 947         if (drive->special.b.set_tune)
 948                 return -EBUSY;
 949         ide_init_drive_cmd(&rq);
 950         drive->tune_req = (u8) arg;
 951         drive->special.b.set_tune = 1;
 952         (void) ide_do_drive_cmd(drive, &rq, ide_wait);
 953         return 0;
 954 }
 955
 956 static int set_unmaskirq(ide_drive_t *drive, int arg)
 957 {
 958         if (drive->no_unmask)
 959                 return -EPERM;
 960
 961         if (arg < 0 || arg > 1)
 962                 return -EINVAL;
 963
 964         if (ide_spin_wait_hwgroup(drive))
 965                 return -EBUSY;
 966         drive->unmask = arg;
 967         spin_unlock_irq(&ide_lock);
 968
 969         return 0;
 970 }
 971
 972 /**
 973  *      system_bus_clock        -       clock guess
 974  *
 975  *      External version of the bus clock guess used by very old IDE drivers
 976  *      for things like VLB timings. Should not be used.
 977  */
 978
 979 int system_bus_clock (void)
 980 {
 981         return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
 982 }
 983
 984 EXPORT_SYMBOL(system_bus_clock);
 985
 986 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
 987 {
 988         ide_drive_t *drive = dev->driver_data;
 989         ide_hwif_t *hwif = HWIF(drive);
 990         struct request rq;
 991         struct request_pm_state rqpm;
 992         ide_task_t args;
 993
 994         /* Call ACPI _GTM only once */
 995         if (!(drive->dn % 2))
 996                 ide_acpi_get_timing(hwif);
 997
 998         memset(&rq, 0, sizeof(rq));
 999         memset(&rqpm, 0, sizeof(rqpm));
1000         memset(&args, 0, sizeof(args));
1001         rq.cmd_type = REQ_TYPE_PM_SUSPEND;
1002         rq.special = &args;
1003         rq.data = &rqpm;
1004         rqpm.pm_step = ide_pm_state_start_suspend;
1005         if (mesg.event == PM_EVENT_PRETHAW)
1006                 mesg.event = PM_EVENT_FREEZE;
1007         rqpm.pm_state = mesg.event;
1008
1009         return ide_do_drive_cmd(drive, &rq, ide_wait);
1010 }
1011
1012 static int generic_ide_resume(struct device *dev)
1013 {
1014         ide_drive_t *drive = dev->driver_data;
1015         ide_hwif_t *hwif = HWIF(drive);
1016         struct request rq;
1017         struct request_pm_state rqpm;
1018         ide_task_t args;
1019
1020         /* Call ACPI _STM only once */
1021         if (!(drive->dn % 2))
1022                 ide_acpi_push_timing(hwif);
1023
1024         ide_acpi_exec_tfs(drive);
1025
1026         memset(&rq, 0, sizeof(rq));
1027         memset(&rqpm, 0, sizeof(rqpm));
1028         memset(&args, 0, sizeof(args));
1029         rq.cmd_type = REQ_TYPE_PM_RESUME;
1030         rq.special = &args;
1031         rq.data = &rqpm;
1032         rqpm.pm_step = ide_pm_state_start_resume;
1033         rqpm.pm_state = PM_EVENT_ON;
1034
1035         return ide_do_drive_cmd(drive, &rq, ide_head_wait);
1036 }
1037
1038 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
1039                         unsigned int cmd, unsigned long arg)
1040 {
1041         unsigned long flags;
1042         ide_driver_t *drv;
1043         void __user *p = (void __user *)arg;
1044         int err = 0, (*setfunc)(ide_drive_t *, int);
1045         u8 *val;
1046
1047         switch (cmd) {
1048         case HDIO_GET_32BIT:        val = &drive->io_32bit;      goto read_val;
1049         case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
1050         case HDIO_GET_UNMASKINTR:   val = &drive->unmask;        goto read_val;
1051         case HDIO_GET_DMA:          val = &drive->using_dma;     goto read_val;
1052         case HDIO_SET_32BIT:        setfunc = set_io_32bit;      goto set_val;
1053         case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings;     goto set_val;
1054         case HDIO_SET_PIO_MODE:     setfunc = set_pio_mode;      goto set_val;
1055         case HDIO_SET_UNMASKINTR:   setfunc = set_unmaskirq;     goto set_val;
1056         case HDIO_SET_DMA:          setfunc = set_using_dma;     goto set_val;
1057         }
1058
1059         switch (cmd) {
1060                 case HDIO_OBSOLETE_IDENTITY:
1061                 case HDIO_GET_IDENTITY:
1062                         if (bdev != bdev->bd_contains)
1063                                 return -EINVAL;
1064                         if (drive->id_read == 0)
1065                                 return -ENOMSG;
1066                         if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1067                                 return -EFAULT;
1068                         return 0;
1069
1070                 case HDIO_GET_NICE:
1071                         return put_user(drive->dsc_overlap      <<      IDE_NICE_DSC_OVERLAP    |
1072                                         drive->atapi_overlap    <<      IDE_NICE_ATAPI_OVERLAP  |
1073                                         drive->nice0            <<      IDE_NICE_0              |
1074                                         drive->nice1            <<      IDE_NICE_1              |
1075                                         drive->nice2            <<      IDE_NICE_2,
1076                                         (long __user *) arg);
1077
1078 #ifdef CONFIG_IDE_TASK_IOCTL
1079                 case HDIO_DRIVE_TASKFILE:
1080                         if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1081                                 return -EACCES;
1082                         switch(drive->media) {
1083                                 case ide_disk:
1084                                         return ide_taskfile_ioctl(drive, cmd, arg);
1085                                 default:
1086                                         return -ENOMSG;
1087                         }
1088 #endif /* CONFIG_IDE_TASK_IOCTL */
1089
1090                 case HDIO_DRIVE_CMD:
1091                         if (!capable(CAP_SYS_RAWIO))
1092                                 return -EACCES;
1093                         return ide_cmd_ioctl(drive, cmd, arg);
1094
1095                 case HDIO_DRIVE_TASK:
1096                         if (!capable(CAP_SYS_RAWIO))
1097                                 return -EACCES;
1098                         return ide_task_ioctl(drive, cmd, arg);
1099
1100                 case HDIO_SCAN_HWIF:
1101                 {
1102                         hw_regs_t hw;
1103                         int args[3];
1104                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1105                         if (copy_from_user(args, p, 3 * sizeof(int)))
1106                                 return -EFAULT;
1107                         memset(&hw, 0, sizeof(hw));
1108                         ide_init_hwif_ports(&hw, (unsigned long) args[0],
1109                                             (unsigned long) args[1], NULL);
1110                         hw.irq = args[2];
1111                         if (ide_register_hw(&hw, NULL) == -1)
1112                                 return -EIO;
1113                         return 0;
1114                 }
1115                 case HDIO_UNREGISTER_HWIF:
1116                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1117                         /* (arg > MAX_HWIFS) checked in function */
1118                         ide_unregister(arg);
1119                         return 0;
1120                 case HDIO_SET_NICE:
1121                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1122                         if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1123                                 return -EPERM;
1124                         drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1125                         drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1126                         if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1127                                 drive->dsc_overlap = 0;
1128                                 return -EPERM;
1129                         }
1130                         drive->nice1 = (arg >> IDE_NICE_1) & 1;
1131                         return 0;
1132                 case HDIO_DRIVE_RESET:
1133                 {
1134                         unsigned long flags;
1135                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1136
1137                         /*
1138                          *      Abort the current command on the
1139                          *      group if there is one, taking
1140                          *      care not to allow anything else
1141                          *      to be queued and to die on the
1142                          *      spot if we miss one somehow
1143                          */
1144
1145                         spin_lock_irqsave(&ide_lock, flags);
1146
1147                         if (HWGROUP(drive)->resetting) {
1148                                 spin_unlock_irqrestore(&ide_lock, flags);
1149                                 return -EBUSY;
1150                         }
1151
1152                         ide_abort(drive, "drive reset");
1153
1154                         BUG_ON(HWGROUP(drive)->handler);
1155
1156                         /* Ensure nothing gets queued after we
1157                            drop the lock. Reset will clear the busy */
1158
1159                         HWGROUP(drive)->busy = 1;
1160                         spin_unlock_irqrestore(&ide_lock, flags);
1161                         (void) ide_do_reset(drive);
1162
1163                         return 0;
1164                 }
1165
1166                 case CDROMEJECT:
1167                 case CDROMCLOSETRAY:
1168                         return scsi_cmd_ioctl(file, bdev->bd_disk, cmd, p);
1169
1170                 case HDIO_GET_BUSSTATE:
1171                         if (!capable(CAP_SYS_ADMIN))
1172                                 return -EACCES;
1173                         if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1174                                 return -EFAULT;
1175                         return 0;
1176
1177                 case HDIO_SET_BUSSTATE:
1178                         if (!capable(CAP_SYS_ADMIN))
1179                                 return -EACCES;
1180                         if (HWIF(drive)->busproc)
1181                                 return HWIF(drive)->busproc(drive, (int)arg);
1182                         return -EOPNOTSUPP;
1183                 default:
1184                         return -EINVAL;
1185         }
1186
1187 read_val:
1188         down(&ide_setting_sem);
1189         spin_lock_irqsave(&ide_lock, flags);
1190         err = *val;
1191         spin_unlock_irqrestore(&ide_lock, flags);
1192         up(&ide_setting_sem);
1193         return err >= 0 ? put_user(err, (long __user *)arg) : err;
1194
1195 set_val:
1196         if (bdev != bdev->bd_contains)
1197                 err = -EINVAL;
1198         else {
1199                 if (!capable(CAP_SYS_ADMIN))
1200                         err = -EACCES;
1201                 else {
1202                         down(&ide_setting_sem);
1203                         err = setfunc(drive, arg);
1204                         up(&ide_setting_sem);
1205                 }
1206         }
1207         return err;
1208 }
1209
1210 EXPORT_SYMBOL(generic_ide_ioctl);
1211
1212 /*
1213  * stridx() returns the offset of c within s,
1214  * or -1 if c is '\0' or not found within s.
1215  */
1216 static int __init stridx (const char *s, char c)
1217 {
1218         char *i = strchr(s, c);
1219         return (i && c) ? i - s : -1;
1220 }
1221
1222 /*
1223  * match_parm() does parsing for ide_setup():
1224  *
1225  * 1. the first char of s must be '='.
1226  * 2. if the remainder matches one of the supplied keywords,
1227  *     the index (1 based) of the keyword is negated and returned.
1228  * 3. if the remainder is a series of no more than max_vals numbers
1229  *     separated by commas, the numbers are saved in vals[] and a
1230  *     count of how many were saved is returned.  Base10 is assumed,
1231  *     and base16 is allowed when prefixed with "0x".
1232  * 4. otherwise, zero is returned.
1233  */
1234 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1235 {
1236         static const char *decimal = "0123456789";
1237         static const char *hex = "0123456789abcdef";
1238         int i, n;
1239
1240         if (*s++ == '=') {
1241                 /*
1242                  * Try matching against the supplied keywords,
1243                  * and return -(index+1) if we match one
1244                  */
1245                 if (keywords != NULL) {
1246                         for (i = 0; *keywords != NULL; ++i) {
1247                                 if (!strcmp(s, *keywords++))
1248                                         return -(i+1);
1249                         }
1250                 }
1251                 /*
1252                  * Look for a series of no more than "max_vals"
1253                  * numeric values separated by commas, in base10,
1254                  * or base16 when prefixed with "0x".
1255                  * Return a count of how many were found.
1256                  */
1257                 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1258                         vals[n] = i;
1259                         while ((i = stridx(decimal, *++s)) >= 0)
1260                                 vals[n] = (vals[n] * 10) + i;
1261                         if (*s == 'x' && !vals[n]) {
1262                                 while ((i = stridx(hex, *++s)) >= 0)
1263                                         vals[n] = (vals[n] * 0x10) + i;
1264                         }
1265                         if (++n == max_vals)
1266                                 break;
1267                         if (*s == ',' || *s == ';')
1268                                 ++s;
1269                 }
1270                 if (!*s)
1271                         return n;
1272         }
1273         return 0;       /* zero = nothing matched */
1274 }
1275
1276 #ifdef CONFIG_BLK_DEV_ALI14XX
1277 extern int probe_ali14xx;
1278 extern int ali14xx_init(void);
1279 #endif
1280 #ifdef CONFIG_BLK_DEV_UMC8672
1281 extern int probe_umc8672;
1282 extern int umc8672_init(void);
1283 #endif
1284 #ifdef CONFIG_BLK_DEV_DTC2278
1285 extern int probe_dtc2278;
1286 extern int dtc2278_init(void);
1287 #endif
1288 #ifdef CONFIG_BLK_DEV_HT6560B
1289 extern int probe_ht6560b;
1290 extern int ht6560b_init(void);
1291 #endif
1292 #ifdef CONFIG_BLK_DEV_QD65XX
1293 extern int probe_qd65xx;
1294 extern int qd65xx_init(void);
1295 #endif
1296
1297 static int __initdata is_chipset_set[MAX_HWIFS];
1298
1299 /*
1300  * ide_setup() gets called VERY EARLY during initialization,
1301  * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1302  *
1303  * Remember to update Documentation/ide.txt if you change something here.
1304  */
1305 static int __init ide_setup(char *s)
1306 {
1307         int i, vals[3];
1308         ide_hwif_t *hwif;
1309         ide_drive_t *drive;
1310         unsigned int hw, unit;
1311         const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1312         const char max_hwif  = '0' + (MAX_HWIFS - 1);
1313
1314
1315         if (strncmp(s,"hd",2) == 0 && s[2] == '=')      /* hd= is for hd.c   */
1316                 return 0;                               /* driver and not us */
1317
1318         if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1319                 return 0;
1320
1321         printk(KERN_INFO "ide_setup: %s", s);
1322         init_ide_data ();
1323
1324 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1325         if (!strcmp(s, "ide=doubler")) {
1326                 extern int ide_doubler;
1327
1328                 printk(" : Enabled support for IDE doublers\n");
1329                 ide_doubler = 1;
1330                 return 1;
1331         }
1332 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1333
1334         if (!strcmp(s, "ide=nodma")) {
1335                 printk(" : Prevented DMA\n");
1336                 noautodma = 1;
1337                 return 1;
1338         }
1339
1340 #ifdef CONFIG_BLK_DEV_IDEPCI
1341         if (!strcmp(s, "ide=reverse")) {
1342                 ide_scan_direction = 1;
1343                 printk(" : Enabled support for IDE inverse scan order.\n");
1344                 return 1;
1345         }
1346 #endif /* CONFIG_BLK_DEV_IDEPCI */
1347
1348 #ifdef CONFIG_BLK_DEV_IDEACPI
1349         if (!strcmp(s, "ide=noacpi")) {
1350                 //printk(" : Disable IDE ACPI support.\n");
1351                 ide_noacpi = 1;
1352                 return 1;
1353         }
1354         if (!strcmp(s, "ide=acpigtf")) {
1355                 //printk(" : Enable IDE ACPI _GTF support.\n");
1356                 ide_noacpitfs = 0;
1357                 return 1;
1358         }
1359         if (!strcmp(s, "ide=acpionboot")) {
1360                 //printk(" : Call IDE ACPI methods on boot.\n");
1361                 ide_noacpionboot = 0;
1362                 return 1;
1363         }
1364 #endif /* CONFIG_BLK_DEV_IDEACPI */
1365
1366         /*
1367          * Look for drive options:  "hdx="
1368          */
1369         if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1370                 const char *hd_words[] = {
1371                         "none", "noprobe", "nowerr", "cdrom", "minus5",
1372                         "autotune", "noautotune", "minus8", "swapdata", "bswap",
1373                         "noflush", "remap", "remap63", "scsi", NULL };
1374                 unit = s[2] - 'a';
1375                 hw   = unit / MAX_DRIVES;
1376                 unit = unit % MAX_DRIVES;
1377                 hwif = &ide_hwifs[hw];
1378                 drive = &hwif->drives[unit];
1379                 if (strncmp(s + 4, "ide-", 4) == 0) {
1380                         strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1381                         goto done;
1382                 }
1383                 switch (match_parm(&s[3], hd_words, vals, 3)) {
1384                         case -1: /* "none" */
1385                         case -2: /* "noprobe" */
1386                                 drive->noprobe = 1;
1387                                 goto done;
1388                         case -3: /* "nowerr" */
1389                                 drive->bad_wstat = BAD_R_STAT;
1390                                 hwif->noprobe = 0;
1391                                 goto done;
1392                         case -4: /* "cdrom" */
1393                                 drive->present = 1;
1394                                 drive->media = ide_cdrom;
1395                                 /* an ATAPI device ignores DRDY */
1396                                 drive->ready_stat = 0;
1397                                 hwif->noprobe = 0;
1398                                 goto done;
1399                         case -6: /* "autotune" */
1400                                 drive->autotune = IDE_TUNE_AUTO;
1401                                 goto obsolete_option;
1402                         case -7: /* "noautotune" */
1403                                 drive->autotune = IDE_TUNE_NOAUTO;
1404                                 goto obsolete_option;
1405                         case -9: /* "swapdata" */
1406                         case -10: /* "bswap" */
1407                                 drive->bswap = 1;
1408                                 goto done;
1409                         case -11: /* noflush */
1410                                 drive->noflush = 1;
1411                                 goto done;
1412                         case -12: /* "remap" */
1413                                 drive->remap_0_to_1 = 1;
1414                                 goto done;
1415                         case -13: /* "remap63" */
1416                                 drive->sect0 = 63;
1417                                 goto done;
1418                         case -14: /* "scsi" */
1419                                 drive->scsi = 1;
1420                                 goto done;
1421                         case 3: /* cyl,head,sect */
1422                                 drive->media    = ide_disk;
1423                                 drive->ready_stat = READY_STAT;
1424                                 drive->cyl      = drive->bios_cyl  = vals[0];
1425                                 drive->head     = drive->bios_head = vals[1];
1426                                 drive->sect     = drive->bios_sect = vals[2];
1427                                 drive->present  = 1;
1428                                 drive->forced_geom = 1;
1429                                 hwif->noprobe = 0;
1430                                 goto done;
1431                         default:
1432                                 goto bad_option;
1433                 }
1434         }
1435
1436         if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1437                 goto bad_option;
1438         /*
1439          * Look for bus speed option:  "idebus="
1440          */
1441         if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1442                 if (match_parm(&s[6], NULL, vals, 1) != 1)
1443                         goto bad_option;
1444                 if (vals[0] >= 20 && vals[0] <= 66) {
1445                         idebus_parameter = vals[0];
1446                 } else
1447                         printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1448                 goto done;
1449         }
1450         /*
1451          * Look for interface options:  "idex="
1452          */
1453         if (s[3] >= '0' && s[3] <= max_hwif) {
1454                 /*
1455                  * Be VERY CAREFUL changing this: note hardcoded indexes below
1456                  * (-8, -9, -10) are reserved to ease the hardcoding.
1457                  */
1458                 static const char *ide_words[] = {
1459                         "noprobe", "serialize", "minus3", "minus4",
1460                         "reset", "dma", "ata66", "minus8", "minus9",
1461                         "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1462                         "dtc2278", "umc8672", "ali14xx", NULL };
1463                 hw = s[3] - '0';
1464                 hwif = &ide_hwifs[hw];
1465                 i = match_parm(&s[4], ide_words, vals, 3);
1466
1467                 /*
1468                  * Cryptic check to ensure chipset not already set for hwif.
1469                  * Note: we can't depend on hwif->chipset here.
1470                  */
1471                 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1472                         /* chipset already specified */
1473                         if (is_chipset_set[hw])
1474                                 goto bad_option;
1475                         if (i > -18 && i <= -11) {
1476                                 /* these drivers are for "ide0=" only */
1477                                 if (hw != 0)
1478                                         goto bad_hwif;
1479                                 /* chipset already specified for 2nd port */
1480                                 if (is_chipset_set[hw+1])
1481                                         goto bad_option;
1482                         }
1483                         is_chipset_set[hw] = 1;
1484                         printk("\n");
1485                 }
1486
1487                 switch (i) {
1488 #ifdef CONFIG_BLK_DEV_ALI14XX
1489                         case -17: /* "ali14xx" */
1490                                 probe_ali14xx = 1;
1491                                 goto done;
1492 #endif
1493 #ifdef CONFIG_BLK_DEV_UMC8672
1494                         case -16: /* "umc8672" */
1495                                 probe_umc8672 = 1;
1496                                 goto done;
1497 #endif
1498 #ifdef CONFIG_BLK_DEV_DTC2278
1499                         case -15: /* "dtc2278" */
1500                                 probe_dtc2278 = 1;
1501                                 goto done;
1502 #endif
1503 #ifdef CONFIG_BLK_DEV_CMD640
1504                         case -14: /* "cmd640_vlb" */
1505                         {
1506                                 extern int cmd640_vlb; /* flag for cmd640.c */
1507                                 cmd640_vlb = 1;
1508                                 goto done;
1509                         }
1510 #endif
1511 #ifdef CONFIG_BLK_DEV_HT6560B
1512                         case -13: /* "ht6560b" */
1513                                 probe_ht6560b = 1;
1514                                 goto done;
1515 #endif
1516 #ifdef CONFIG_BLK_DEV_QD65XX
1517                         case -12: /* "qd65xx" */
1518                                 probe_qd65xx = 1;
1519                                 goto done;
1520 #endif
1521 #ifdef CONFIG_BLK_DEV_4DRIVES
1522                         case -11: /* "four" drives on one set of ports */
1523                         {
1524                                 ide_hwif_t *mate = &ide_hwifs[hw^1];
1525                                 mate->drives[0].select.all ^= 0x20;
1526                                 mate->drives[1].select.all ^= 0x20;
1527                                 hwif->chipset = mate->chipset = ide_4drives;
1528                                 mate->irq = hwif->irq;
1529                                 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1530                                 hwif->mate = mate;
1531                                 mate->mate = hwif;
1532                                 hwif->serialized = mate->serialized = 1;
1533                                 goto obsolete_option;
1534                         }
1535 #endif /* CONFIG_BLK_DEV_4DRIVES */
1536                         case -10: /* minus10 */
1537                         case -9: /* minus9 */
1538                         case -8: /* minus8 */
1539                         case -4:
1540                         case -3:
1541                                 goto bad_option;
1542                         case -7: /* ata66 */
1543 #ifdef CONFIG_BLK_DEV_IDEPCI
1544                                 hwif->udma_four = 1;
1545                                 goto obsolete_option;
1546 #else
1547                                 goto bad_hwif;
1548 #endif
1549                         case -6: /* dma */
1550                                 hwif->autodma = 1;
1551                                 goto obsolete_option;
1552                         case -5: /* "reset" */
1553                                 hwif->reset = 1;
1554                                 goto obsolete_option;
1555                         case -2: /* "serialize" */
1556                                 hwif->mate = &ide_hwifs[hw^1];
1557                                 hwif->mate->mate = hwif;
1558                                 hwif->serialized = hwif->mate->serialized = 1;
1559                                 goto obsolete_option;
1560
1561                         case -1: /* "noprobe" */
1562                                 hwif->noprobe = 1;
1563                                 goto done;
1564
1565                         case 1: /* base */
1566                                 vals[1] = vals[0] + 0x206; /* default ctl */
1567                         case 2: /* base,ctl */
1568                                 vals[2] = 0;    /* default irq = probe for it */
1569                         case 3: /* base,ctl,irq */
1570                                 hwif->hw.irq = vals[2];
1571                                 ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq);
1572                                 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
1573                                 hwif->irq      = vals[2];
1574                                 hwif->noprobe  = 0;
1575                                 hwif->chipset  = ide_forced;
1576                                 goto obsolete_option;
1577
1578                         case 0: goto bad_option;
1579                         default:
1580                                 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1581                                 return 1;
1582                 }
1583         }
1584 bad_option:
1585         printk(" -- BAD OPTION\n");
1586         return 1;
1587 obsolete_option:
1588         printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1589         return 1;
1590 bad_hwif:
1591         printk("-- NOT SUPPORTED ON ide%d", hw);
1592 done:
1593         printk("\n");
1594         return 1;
1595 }
1596
1597 extern void __init pnpide_init(void);
1598 extern void __exit pnpide_exit(void);
1599 extern void __init h8300_ide_init(void);
1600
1601 /*
1602  * probe_for_hwifs() finds/initializes "known" IDE interfaces
1603  */
1604 static void __init probe_for_hwifs (void)
1605 {
1606 #ifdef CONFIG_BLK_DEV_IDEPCI
1607         ide_scan_pcibus(ide_scan_direction);
1608 #endif /* CONFIG_BLK_DEV_IDEPCI */
1609
1610 #ifdef CONFIG_ETRAX_IDE
1611         {
1612                 extern void init_e100_ide(void);
1613                 init_e100_ide();
1614         }
1615 #endif /* CONFIG_ETRAX_IDE */
1616 #ifdef CONFIG_BLK_DEV_CMD640
1617         {
1618                 extern void ide_probe_for_cmd640x(void);
1619                 ide_probe_for_cmd640x();
1620         }
1621 #endif /* CONFIG_BLK_DEV_CMD640 */
1622 #ifdef CONFIG_BLK_DEV_IDE_PMAC
1623         {
1624                 extern int pmac_ide_probe(void);
1625                 (void)pmac_ide_probe();
1626         }
1627 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
1628 #ifdef CONFIG_BLK_DEV_GAYLE
1629         {
1630                 extern void gayle_init(void);
1631                 gayle_init();
1632         }
1633 #endif /* CONFIG_BLK_DEV_GAYLE */
1634 #ifdef CONFIG_BLK_DEV_FALCON_IDE
1635         {
1636                 extern void falconide_init(void);
1637                 falconide_init();
1638         }
1639 #endif /* CONFIG_BLK_DEV_FALCON_IDE */
1640 #ifdef CONFIG_BLK_DEV_MAC_IDE
1641         {
1642                 extern void macide_init(void);
1643                 macide_init();
1644         }
1645 #endif /* CONFIG_BLK_DEV_MAC_IDE */
1646 #ifdef CONFIG_BLK_DEV_Q40IDE
1647         {
1648                 extern void q40ide_init(void);
1649                 q40ide_init();
1650         }
1651 #endif /* CONFIG_BLK_DEV_Q40IDE */
1652 #ifdef CONFIG_BLK_DEV_BUDDHA
1653         {
1654                 extern void buddha_init(void);
1655                 buddha_init();
1656         }
1657 #endif /* CONFIG_BLK_DEV_BUDDHA */
1658 #ifdef CONFIG_BLK_DEV_IDEPNP
1659         pnpide_init();
1660 #endif
1661 #ifdef CONFIG_H8300
1662         h8300_ide_init();
1663 #endif
1664 }
1665
1666 /*
1667  * Probe module
1668  */
1669
1670 EXPORT_SYMBOL(ide_lock);
1671
1672 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1673 {
1674         return 1;
1675 }
1676
1677 static char *media_string(ide_drive_t *drive)
1678 {
1679         switch (drive->media) {
1680         case ide_disk:
1681                 return "disk";
1682         case ide_cdrom:
1683                 return "cdrom";
1684         case ide_tape:
1685                 return "tape";
1686         case ide_floppy:
1687                 return "floppy";
1688         case ide_optical:
1689                 return "optical";
1690         default:
1691                 return "UNKNOWN";
1692         }
1693 }
1694
1695 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1696 {
1697         ide_drive_t *drive = to_ide_device(dev);
1698         return sprintf(buf, "%s\n", media_string(drive));
1699 }
1700
1701 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1702 {
1703         ide_drive_t *drive = to_ide_device(dev);
1704         return sprintf(buf, "%s\n", drive->name);
1705 }
1706
1707 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1708 {
1709         ide_drive_t *drive = to_ide_device(dev);
1710         return sprintf(buf, "ide:m-%s\n", media_string(drive));
1711 }
1712
1713 static struct device_attribute ide_dev_attrs[] = {
1714         __ATTR_RO(media),
1715         __ATTR_RO(drivename),
1716         __ATTR_RO(modalias),
1717         __ATTR_NULL
1718 };
1719
1720 static int ide_uevent(struct device *dev, char **envp, int num_envp,
1721                       char *buffer, int buffer_size)
1722 {
1723         ide_drive_t *drive = to_ide_device(dev);
1724         int i = 0;
1725         int length = 0;
1726
1727         add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1728                        "MEDIA=%s", media_string(drive));
1729         add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1730                        "DRIVENAME=%s", drive->name);
1731         add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1732                        "MODALIAS=ide:m-%s", media_string(drive));
1733         envp[i] = NULL;
1734         return 0;
1735 }
1736
1737 static int generic_ide_probe(struct device *dev)
1738 {
1739         ide_drive_t *drive = to_ide_device(dev);
1740         ide_driver_t *drv = to_ide_driver(dev->driver);
1741
1742         return drv->probe ? drv->probe(drive) : -ENODEV;
1743 }
1744
1745 static int generic_ide_remove(struct device *dev)
1746 {
1747         ide_drive_t *drive = to_ide_device(dev);
1748         ide_driver_t *drv = to_ide_driver(dev->driver);
1749
1750         if (drv->remove)
1751                 drv->remove(drive);
1752
1753         return 0;
1754 }
1755
1756 static void generic_ide_shutdown(struct device *dev)
1757 {
1758         ide_drive_t *drive = to_ide_device(dev);
1759         ide_driver_t *drv = to_ide_driver(dev->driver);
1760
1761         if (dev->driver && drv->shutdown)
1762                 drv->shutdown(drive);
1763 }
1764
1765 struct bus_type ide_bus_type = {
1766         .name           = "ide",
1767         .match          = ide_bus_match,
1768         .uevent         = ide_uevent,
1769         .probe          = generic_ide_probe,
1770         .remove         = generic_ide_remove,
1771         .shutdown       = generic_ide_shutdown,
1772         .dev_attrs      = ide_dev_attrs,
1773         .suspend        = generic_ide_suspend,
1774         .resume         = generic_ide_resume,
1775 };
1776
1777 EXPORT_SYMBOL_GPL(ide_bus_type);
1778
1779 /*
1780  * This is gets invoked once during initialization, to set *everything* up
1781  */
1782 static int __init ide_init(void)
1783 {
1784         int ret;
1785
1786         printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
1787         system_bus_speed = ide_system_bus_speed();
1788
1789         ret = bus_register(&ide_bus_type);
1790         if (ret < 0) {
1791                 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1792                 return ret;
1793         }
1794
1795         init_ide_data();
1796
1797 #ifdef CONFIG_IDE_PROC_FS
1798         proc_ide_root = proc_mkdir("ide", NULL);
1799 #endif
1800
1801 #ifdef CONFIG_BLK_DEV_ALI14XX
1802         if (probe_ali14xx)
1803                 (void)ali14xx_init();
1804 #endif
1805 #ifdef CONFIG_BLK_DEV_UMC8672
1806         if (probe_umc8672)
1807                 (void)umc8672_init();
1808 #endif
1809 #ifdef CONFIG_BLK_DEV_DTC2278
1810         if (probe_dtc2278)
1811                 (void)dtc2278_init();
1812 #endif
1813 #ifdef CONFIG_BLK_DEV_HT6560B
1814         if (probe_ht6560b)
1815                 (void)ht6560b_init();
1816 #endif
1817 #ifdef CONFIG_BLK_DEV_QD65XX
1818         if (probe_qd65xx)
1819                 (void)qd65xx_init();
1820 #endif
1821
1822         initializing = 1;
1823         /* Probe for special PCI and other "known" interface chipsets. */
1824         probe_for_hwifs();
1825         initializing = 0;
1826
1827         proc_ide_create();
1828
1829         return 0;
1830 }
1831
1832 #ifdef MODULE
1833 static char *options = NULL;
1834 module_param(options, charp, 0);
1835 MODULE_LICENSE("GPL");
1836
1837 static void __init parse_options (char *line)
1838 {
1839         char *next = line;
1840
1841         if (line == NULL || !*line)
1842                 return;
1843         while ((line = next) != NULL) {
1844                 if ((next = strchr(line,' ')) != NULL)
1845                         *next++ = 0;
1846                 if (!ide_setup(line))
1847                         printk (KERN_INFO "Unknown option '%s'\n", line);
1848         }
1849 }
1850
1851 int __init init_module (void)
1852 {
1853         parse_options(options);
1854         return ide_init();
1855 }
1856
1857 void __exit cleanup_module (void)
1858 {
1859         int index;
1860
1861         for (index = 0; index < MAX_HWIFS; ++index)
1862                 ide_unregister(index);
1863
1864 #ifdef CONFIG_BLK_DEV_IDEPNP
1865         pnpide_exit();
1866 #endif
1867
1868         proc_ide_destroy();
1869
1870         bus_unregister(&ide_bus_type);
1871 }
1872
1873 #else /* !MODULE */
1874
1875 __setup("", ide_setup);
1876
1877 module_init(ide_init);
1878
1879 #endif /* MODULE */