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 /**
 827  *      __ide_add_setting       -       add an ide setting option
 828  *      @drive: drive to use
 829  *      @name: setting name
 830  *      @rw: true if the function is read write
 831  *      @read_ioctl: function to call on read
 832  *      @write_ioctl: function to call on write
 833  *      @data_type: type of data
 834  *      @min: range minimum
 835  *      @max: range maximum
 836  *      @mul_factor: multiplication scale
 837  *      @div_factor: divison scale
 838  *      @data: private data field
 839  *      @set: setting
 840  *      @auto_remove: setting auto removal flag
 841  *
 842  *      Removes the setting named from the device if it is present.
 843  *      The function takes the settings_lock to protect against
 844  *      parallel changes. This function must not be called from IRQ
 845  *      context. Returns 0 on success or -1 on failure.
 846  *
 847  *      BUGS: This code is seriously over-engineered. There is also
 848  *      magic about how the driver specific features are setup. If
 849  *      a driver is attached we assume the driver settings are auto
 850  *      remove.
 851  */
 852
 853 static int __ide_add_setting(ide_drive_t *drive, const char *name, int rw, int read_ioctl, int write_ioctl, int data_type, int min, int max, int mul_factor, int div_factor, void *data, ide_procset_t *set, int auto_remove)
 854 {
 855         ide_settings_t **p = (ide_settings_t **) &drive->settings, *setting = NULL;
 856
 857         down(&ide_setting_sem);
 858         while ((*p) && strcmp((*p)->name, name) < 0)
 859                 p = &((*p)->next);
 860         if ((setting = kzalloc(sizeof(*setting), GFP_KERNEL)) == NULL)
 861                 goto abort;
 862         if ((setting->name = kmalloc(strlen(name) + 1, GFP_KERNEL)) == NULL)
 863                 goto abort;
 864         strcpy(setting->name, name);
 865         setting->rw = rw;
 866         setting->read_ioctl = read_ioctl;
 867         setting->write_ioctl = write_ioctl;
 868         setting->data_type = data_type;
 869         setting->min = min;
 870         setting->max = max;
 871         setting->mul_factor = mul_factor;
 872         setting->div_factor = div_factor;
 873         setting->data = data;
 874         setting->set = set;
 875
 876         setting->next = *p;
 877         if (auto_remove)
 878                 setting->auto_remove = 1;
 879         *p = setting;
 880         up(&ide_setting_sem);
 881         return 0;
 882 abort:
 883         up(&ide_setting_sem);
 884         kfree(setting);
 885         return -1;
 886 }
 887
 888 int ide_add_setting(ide_drive_t *drive, const char *name, int rw, int read_ioctl, int write_ioctl, int data_type, int min, int max, int mul_factor, int div_factor, void *data, ide_procset_t *set)
 889 {
 890         return __ide_add_setting(drive, name, rw, read_ioctl, write_ioctl, data_type, min, max, mul_factor, div_factor, data, set, 1);
 891 }
 892
 893 EXPORT_SYMBOL(ide_add_setting);
 894
 895 /**
 896  *      __ide_remove_setting    -       remove an ide setting option
 897  *      @drive: drive to use
 898  *      @name: setting name
 899  *
 900  *      Removes the setting named from the device if it is present.
 901  *      The caller must hold the setting semaphore.
 902  */
 903
 904 static void __ide_remove_setting (ide_drive_t *drive, char *name)
 905 {
 906         ide_settings_t **p, *setting;
 907
 908         p = (ide_settings_t **) &drive->settings;
 909
 910         while ((*p) && strcmp((*p)->name, name))
 911                 p = &((*p)->next);
 912         if ((setting = (*p)) == NULL)
 913                 return;
 914
 915         (*p) = setting->next;
 916
 917         kfree(setting->name);
 918         kfree(setting);
 919 }
 920
 921 /**
 922  *      ide_find_setting_by_ioctl       -       find a drive specific ioctl
 923  *      @drive: drive to scan
 924  *      @cmd: ioctl command to handle
 925  *
 926  *      Scan's the device setting table for a matching entry and returns
 927  *      this or NULL if no entry is found. The caller must hold the
 928  *      setting semaphore
 929  */
 930
 931 static ide_settings_t *ide_find_setting_by_ioctl (ide_drive_t *drive, int cmd)
 932 {
 933         ide_settings_t *setting = drive->settings;
 934
 935         while (setting) {
 936                 if (setting->read_ioctl == cmd || setting->write_ioctl == cmd)
 937                         break;
 938                 setting = setting->next;
 939         }
 940
 941         return setting;
 942 }
 943
 944 /**
 945  *      ide_find_setting_by_name        -       find a drive specific setting
 946  *      @drive: drive to scan
 947  *      @name: setting name
 948  *
 949  *      Scan's the device setting table for a matching entry and returns
 950  *      this or NULL if no entry is found. The caller must hold the
 951  *      setting semaphore
 952  */
 953
 954 ide_settings_t *ide_find_setting_by_name (ide_drive_t *drive, char *name)
 955 {
 956         ide_settings_t *setting = drive->settings;
 957
 958         while (setting) {
 959                 if (strcmp(setting->name, name) == 0)
 960                         break;
 961                 setting = setting->next;
 962         }
 963         return setting;
 964 }
 965
 966 /**
 967  *      auto_remove_settings    -       remove driver specific settings
 968  *      @drive: drive
 969  *
 970  *      Automatically remove all the driver specific settings for this
 971  *      drive. This function may not be called from IRQ context. The
 972  *      caller must hold ide_setting_sem.
 973  */
 974
 975 static void auto_remove_settings (ide_drive_t *drive)
 976 {
 977         ide_settings_t *setting;
 978 repeat:
 979         setting = drive->settings;
 980         while (setting) {
 981                 if (setting->auto_remove) {
 982                         __ide_remove_setting(drive, setting->name);
 983                         goto repeat;
 984                 }
 985                 setting = setting->next;
 986         }
 987 }
 988
 989 /**
 990  *      ide_read_setting        -       read an IDE setting
 991  *      @drive: drive to read from
 992  *      @setting: drive setting
 993  *
 994  *      Read a drive setting and return the value. The caller
 995  *      must hold the ide_setting_sem when making this call.
 996  *
 997  *      BUGS: the data return and error are the same return value
 998  *      so an error -EINVAL and true return of the same value cannot
 999  *      be told apart
1000  */
1001
1002 int ide_read_setting (ide_drive_t *drive, ide_settings_t *setting)
1003 {
1004         int             val = -EINVAL;
1005         unsigned long   flags;
1006
1007         if ((setting->rw & SETTING_READ)) {
1008                 spin_lock_irqsave(&ide_lock, flags);
1009                 switch(setting->data_type) {
1010                         case TYPE_BYTE:
1011                                 val = *((u8 *) setting->data);
1012                                 break;
1013                         case TYPE_SHORT:
1014                                 val = *((u16 *) setting->data);
1015                                 break;
1016                         case TYPE_INT:
1017                         case TYPE_INTA:
1018                                 val = *((u32 *) setting->data);
1019                                 break;
1020                 }
1021                 spin_unlock_irqrestore(&ide_lock, flags);
1022         }
1023         return val;
1024 }
1025
1026 /**
1027  *      ide_spin_wait_hwgroup   -       wait for group
1028  *      @drive: drive in the group
1029  *
1030  *      Wait for an IDE device group to go non busy and then return
1031  *      holding the ide_lock which guards the hwgroup->busy status
1032  *      and right to use it.
1033  */
1034
1035 int ide_spin_wait_hwgroup (ide_drive_t *drive)
1036 {
1037         ide_hwgroup_t *hwgroup = HWGROUP(drive);
1038         unsigned long timeout = jiffies + (3 * HZ);
1039
1040         spin_lock_irq(&ide_lock);
1041
1042         while (hwgroup->busy) {
1043                 unsigned long lflags;
1044                 spin_unlock_irq(&ide_lock);
1045                 local_irq_set(lflags);
1046                 if (time_after(jiffies, timeout)) {
1047                         local_irq_restore(lflags);
1048                         printk(KERN_ERR "%s: channel busy\n", drive->name);
1049                         return -EBUSY;
1050                 }
1051                 local_irq_restore(lflags);
1052                 spin_lock_irq(&ide_lock);
1053         }
1054         return 0;
1055 }
1056
1057 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
1058
1059 /**
1060  *      ide_write_setting       -       read an IDE setting
1061  *      @drive: drive to read from
1062  *      @setting: drive setting
1063  *      @val: value
1064  *
1065  *      Write a drive setting if it is possible. The caller
1066  *      must hold the ide_setting_sem when making this call.
1067  *
1068  *      BUGS: the data return and error are the same return value
1069  *      so an error -EINVAL and true return of the same value cannot
1070  *      be told apart
1071  *
1072  *      FIXME:  This should be changed to enqueue a special request
1073  *      to the driver to change settings, and then wait on a sema for completion.
1074  *      The current scheme of polling is kludgy, though safe enough.
1075  */
1076
1077 int ide_write_setting (ide_drive_t *drive, ide_settings_t *setting, int val)
1078 {
1079         int i;
1080         u32 *p;
1081
1082         if (!capable(CAP_SYS_ADMIN))
1083                 return -EACCES;
1084         if (!(setting->rw & SETTING_WRITE))
1085                 return -EPERM;
1086         if (val < setting->min || val > setting->max)
1087                 return -EINVAL;
1088         if (setting->set)
1089                 return setting->set(drive, val);
1090         if (ide_spin_wait_hwgroup(drive))
1091                 return -EBUSY;
1092         switch (setting->data_type) {
1093                 case TYPE_BYTE:
1094                         *((u8 *) setting->data) = val;
1095                         break;
1096                 case TYPE_SHORT:
1097                         *((u16 *) setting->data) = val;
1098                         break;
1099                 case TYPE_INT:
1100                         *((u32 *) setting->data) = val;
1101                         break;
1102                 case TYPE_INTA:
1103                         p = (u32 *) setting->data;
1104                         for (i = 0; i < 1 << PARTN_BITS; i++, p++)
1105                                 *p = val;
1106                         break;
1107         }
1108         spin_unlock_irq(&ide_lock);
1109         return 0;
1110 }
1111
1112 static int set_io_32bit(ide_drive_t *drive, int arg)
1113 {
1114         drive->io_32bit = arg;
1115 #ifdef CONFIG_BLK_DEV_DTC2278
1116         if (HWIF(drive)->chipset == ide_dtc2278)
1117                 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
1118 #endif /* CONFIG_BLK_DEV_DTC2278 */
1119         return 0;
1120 }
1121
1122 static int set_using_dma (ide_drive_t *drive, int arg)
1123 {
1124 #ifdef CONFIG_BLK_DEV_IDEDMA
1125         ide_hwif_t *hwif = drive->hwif;
1126         int err = -EPERM;
1127
1128         if (!drive->id || !(drive->id->capability & 1))
1129                 goto out;
1130
1131         if (hwif->ide_dma_check == NULL)
1132                 goto out;
1133
1134         err = -EBUSY;
1135         if (ide_spin_wait_hwgroup(drive))
1136                 goto out;
1137         /*
1138          * set ->busy flag, unlock and let it ride
1139          */
1140         hwif->hwgroup->busy = 1;
1141         spin_unlock_irq(&ide_lock);
1142
1143         err = 0;
1144
1145         if (arg) {
1146                 if (ide_set_dma(drive) || hwif->ide_dma_on(drive))
1147                         err = -EIO;
1148         } else
1149                 ide_dma_off(drive);
1150
1151         /*
1152          * lock, clear ->busy flag and unlock before leaving
1153          */
1154         spin_lock_irq(&ide_lock);
1155         hwif->hwgroup->busy = 0;
1156         spin_unlock_irq(&ide_lock);
1157 out:
1158         return err;
1159 #else
1160         return -EPERM;
1161 #endif
1162 }
1163
1164 static int set_pio_mode (ide_drive_t *drive, int arg)
1165 {
1166         struct request rq;
1167
1168         if (!HWIF(drive)->tuneproc)
1169                 return -ENOSYS;
1170         if (drive->special.b.set_tune)
1171                 return -EBUSY;
1172         ide_init_drive_cmd(&rq);
1173         drive->tune_req = (u8) arg;
1174         drive->special.b.set_tune = 1;
1175         (void) ide_do_drive_cmd(drive, &rq, ide_wait);
1176         return 0;
1177 }
1178
1179 static int set_xfer_rate (ide_drive_t *drive, int arg)
1180 {
1181         int err = ide_wait_cmd(drive,
1182                         WIN_SETFEATURES, (u8) arg,
1183                         SETFEATURES_XFER, 0, NULL);
1184
1185         if (!err && arg) {
1186                 ide_set_xfer_rate(drive, (u8) arg);
1187                 ide_driveid_update(drive);
1188         }
1189         return err;
1190 }
1191
1192 /**
1193  *      ide_add_generic_settings        -       generic ide settings
1194  *      @drive: drive being configured
1195  *
1196  *      Add the generic parts of the system settings to the /proc files and
1197  *      ioctls for this IDE device. The caller must not be holding the
1198  *      ide_setting_sem.
1199  */
1200
1201 void ide_add_generic_settings (ide_drive_t *drive)
1202 {
1203 /*
1204  *                        drive         setting name            read/write access                               read ioctl              write ioctl             data type       min     max                             mul_factor      div_factor      data pointer                    set function
1205  */
1206         __ide_add_setting(drive,        "io_32bit",             drive->no_io_32bit ? SETTING_READ : SETTING_RW, HDIO_GET_32BIT,         HDIO_SET_32BIT,         TYPE_BYTE,      0,      1 + (SUPPORT_VLB_SYNC << 1),    1,              1,              &drive->io_32bit,               set_io_32bit,   0);
1207         __ide_add_setting(drive,        "keepsettings",         SETTING_RW,                                     HDIO_GET_KEEPSETTINGS,  HDIO_SET_KEEPSETTINGS,  TYPE_BYTE,      0,      1,                              1,              1,              &drive->keep_settings,          NULL,           0);
1208         __ide_add_setting(drive,        "nice1",                SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->nice1,                  NULL,           0);
1209         __ide_add_setting(drive,        "pio_mode",             SETTING_WRITE,                                  -1,                     HDIO_SET_PIO_MODE,      TYPE_BYTE,      0,      255,                            1,              1,              NULL,                           set_pio_mode,   0);
1210         __ide_add_setting(drive,        "unmaskirq",            drive->no_unmask ? SETTING_READ : SETTING_RW,   HDIO_GET_UNMASKINTR,    HDIO_SET_UNMASKINTR,    TYPE_BYTE,      0,      1,                              1,              1,              &drive->unmask,                 NULL,           0);
1211         __ide_add_setting(drive,        "using_dma",            SETTING_RW,                                     HDIO_GET_DMA,           HDIO_SET_DMA,           TYPE_BYTE,      0,      1,                              1,              1,              &drive->using_dma,              set_using_dma,  0);
1212         __ide_add_setting(drive,        "init_speed",           SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->init_speed,             NULL,           0);
1213         __ide_add_setting(drive,        "current_speed",        SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->current_speed,          set_xfer_rate,  0);
1214         __ide_add_setting(drive,        "number",               SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      3,                              1,              1,              &drive->dn,                     NULL,           0);
1215 }
1216
1217 /**
1218  *      system_bus_clock        -       clock guess
1219  *
1220  *      External version of the bus clock guess used by very old IDE drivers
1221  *      for things like VLB timings. Should not be used.
1222  */
1223
1224 int system_bus_clock (void)
1225 {
1226         return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
1227 }
1228
1229 EXPORT_SYMBOL(system_bus_clock);
1230
1231 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
1232 {
1233         ide_drive_t *drive = dev->driver_data;
1234         ide_hwif_t *hwif = HWIF(drive);
1235         struct request rq;
1236         struct request_pm_state rqpm;
1237         ide_task_t args;
1238
1239         /* Call ACPI _GTM only once */
1240         if (!(drive->dn % 2))
1241                 ide_acpi_get_timing(hwif);
1242
1243         memset(&rq, 0, sizeof(rq));
1244         memset(&rqpm, 0, sizeof(rqpm));
1245         memset(&args, 0, sizeof(args));
1246         rq.cmd_type = REQ_TYPE_PM_SUSPEND;
1247         rq.special = &args;
1248         rq.data = &rqpm;
1249         rqpm.pm_step = ide_pm_state_start_suspend;
1250         if (mesg.event == PM_EVENT_PRETHAW)
1251                 mesg.event = PM_EVENT_FREEZE;
1252         rqpm.pm_state = mesg.event;
1253
1254         return ide_do_drive_cmd(drive, &rq, ide_wait);
1255 }
1256
1257 static int generic_ide_resume(struct device *dev)
1258 {
1259         ide_drive_t *drive = dev->driver_data;
1260         ide_hwif_t *hwif = HWIF(drive);
1261         struct request rq;
1262         struct request_pm_state rqpm;
1263         ide_task_t args;
1264
1265         /* Call ACPI _STM only once */
1266         if (!(drive->dn % 2))
1267                 ide_acpi_push_timing(hwif);
1268
1269         ide_acpi_exec_tfs(drive);
1270
1271         memset(&rq, 0, sizeof(rq));
1272         memset(&rqpm, 0, sizeof(rqpm));
1273         memset(&args, 0, sizeof(args));
1274         rq.cmd_type = REQ_TYPE_PM_RESUME;
1275         rq.special = &args;
1276         rq.data = &rqpm;
1277         rqpm.pm_step = ide_pm_state_start_resume;
1278         rqpm.pm_state = PM_EVENT_ON;
1279
1280         return ide_do_drive_cmd(drive, &rq, ide_head_wait);
1281 }
1282
1283 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
1284                         unsigned int cmd, unsigned long arg)
1285 {
1286         ide_settings_t *setting;
1287         ide_driver_t *drv;
1288         int err = 0;
1289         void __user *p = (void __user *)arg;
1290
1291         down(&ide_setting_sem);
1292         if ((setting = ide_find_setting_by_ioctl(drive, cmd)) != NULL) {
1293                 if (cmd == setting->read_ioctl) {
1294                         err = ide_read_setting(drive, setting);
1295                         up(&ide_setting_sem);
1296                         return err >= 0 ? put_user(err, (long __user *)arg) : err;
1297                 } else {
1298                         if (bdev != bdev->bd_contains)
1299                                 err = -EINVAL;
1300                         else
1301                                 err = ide_write_setting(drive, setting, arg);
1302                         up(&ide_setting_sem);
1303                         return err;
1304                 }
1305         }
1306         up(&ide_setting_sem);
1307
1308         switch (cmd) {
1309                 case HDIO_OBSOLETE_IDENTITY:
1310                 case HDIO_GET_IDENTITY:
1311                         if (bdev != bdev->bd_contains)
1312                                 return -EINVAL;
1313                         if (drive->id_read == 0)
1314                                 return -ENOMSG;
1315                         if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1316                                 return -EFAULT;
1317                         return 0;
1318
1319                 case HDIO_GET_NICE:
1320                         return put_user(drive->dsc_overlap      <<      IDE_NICE_DSC_OVERLAP    |
1321                                         drive->atapi_overlap    <<      IDE_NICE_ATAPI_OVERLAP  |
1322                                         drive->nice0            <<      IDE_NICE_0              |
1323                                         drive->nice1            <<      IDE_NICE_1              |
1324                                         drive->nice2            <<      IDE_NICE_2,
1325                                         (long __user *) arg);
1326
1327 #ifdef CONFIG_IDE_TASK_IOCTL
1328                 case HDIO_DRIVE_TASKFILE:
1329                         if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1330                                 return -EACCES;
1331                         switch(drive->media) {
1332                                 case ide_disk:
1333                                         return ide_taskfile_ioctl(drive, cmd, arg);
1334                                 default:
1335                                         return -ENOMSG;
1336                         }
1337 #endif /* CONFIG_IDE_TASK_IOCTL */
1338
1339                 case HDIO_DRIVE_CMD:
1340                         if (!capable(CAP_SYS_RAWIO))
1341                                 return -EACCES;
1342                         return ide_cmd_ioctl(drive, cmd, arg);
1343
1344                 case HDIO_DRIVE_TASK:
1345                         if (!capable(CAP_SYS_RAWIO))
1346                                 return -EACCES;
1347                         return ide_task_ioctl(drive, cmd, arg);
1348
1349                 case HDIO_SCAN_HWIF:
1350                 {
1351                         hw_regs_t hw;
1352                         int args[3];
1353                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1354                         if (copy_from_user(args, p, 3 * sizeof(int)))
1355                                 return -EFAULT;
1356                         memset(&hw, 0, sizeof(hw));
1357                         ide_init_hwif_ports(&hw, (unsigned long) args[0],
1358                                             (unsigned long) args[1], NULL);
1359                         hw.irq = args[2];
1360                         if (ide_register_hw(&hw, NULL) == -1)
1361                                 return -EIO;
1362                         return 0;
1363                 }
1364                 case HDIO_UNREGISTER_HWIF:
1365                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1366                         /* (arg > MAX_HWIFS) checked in function */
1367                         ide_unregister(arg);
1368                         return 0;
1369                 case HDIO_SET_NICE:
1370                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1371                         if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1372                                 return -EPERM;
1373                         drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1374                         drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1375                         if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1376                                 drive->dsc_overlap = 0;
1377                                 return -EPERM;
1378                         }
1379                         drive->nice1 = (arg >> IDE_NICE_1) & 1;
1380                         return 0;
1381                 case HDIO_DRIVE_RESET:
1382                 {
1383                         unsigned long flags;
1384                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1385
1386                         /*
1387                          *      Abort the current command on the
1388                          *      group if there is one, taking
1389                          *      care not to allow anything else
1390                          *      to be queued and to die on the
1391                          *      spot if we miss one somehow
1392                          */
1393
1394                         spin_lock_irqsave(&ide_lock, flags);
1395
1396                         if (HWGROUP(drive)->resetting) {
1397                                 spin_unlock_irqrestore(&ide_lock, flags);
1398                                 return -EBUSY;
1399                         }
1400
1401                         ide_abort(drive, "drive reset");
1402
1403                         BUG_ON(HWGROUP(drive)->handler);
1404
1405                         /* Ensure nothing gets queued after we
1406                            drop the lock. Reset will clear the busy */
1407
1408                         HWGROUP(drive)->busy = 1;
1409                         spin_unlock_irqrestore(&ide_lock, flags);
1410                         (void) ide_do_reset(drive);
1411
1412                         return 0;
1413                 }
1414
1415                 case CDROMEJECT:
1416                 case CDROMCLOSETRAY:
1417                         return scsi_cmd_ioctl(file, bdev->bd_disk, cmd, p);
1418
1419                 case HDIO_GET_BUSSTATE:
1420                         if (!capable(CAP_SYS_ADMIN))
1421                                 return -EACCES;
1422                         if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1423                                 return -EFAULT;
1424                         return 0;
1425
1426                 case HDIO_SET_BUSSTATE:
1427                         if (!capable(CAP_SYS_ADMIN))
1428                                 return -EACCES;
1429                         if (HWIF(drive)->busproc)
1430                                 return HWIF(drive)->busproc(drive, (int)arg);
1431                         return -EOPNOTSUPP;
1432                 default:
1433                         return -EINVAL;
1434         }
1435 }
1436
1437 EXPORT_SYMBOL(generic_ide_ioctl);
1438
1439 /*
1440  * stridx() returns the offset of c within s,
1441  * or -1 if c is '\0' or not found within s.
1442  */
1443 static int __init stridx (const char *s, char c)
1444 {
1445         char *i = strchr(s, c);
1446         return (i && c) ? i - s : -1;
1447 }
1448
1449 /*
1450  * match_parm() does parsing for ide_setup():
1451  *
1452  * 1. the first char of s must be '='.
1453  * 2. if the remainder matches one of the supplied keywords,
1454  *     the index (1 based) of the keyword is negated and returned.
1455  * 3. if the remainder is a series of no more than max_vals numbers
1456  *     separated by commas, the numbers are saved in vals[] and a
1457  *     count of how many were saved is returned.  Base10 is assumed,
1458  *     and base16 is allowed when prefixed with "0x".
1459  * 4. otherwise, zero is returned.
1460  */
1461 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1462 {
1463         static const char *decimal = "0123456789";
1464         static const char *hex = "0123456789abcdef";
1465         int i, n;
1466
1467         if (*s++ == '=') {
1468                 /*
1469                  * Try matching against the supplied keywords,
1470                  * and return -(index+1) if we match one
1471                  */
1472                 if (keywords != NULL) {
1473                         for (i = 0; *keywords != NULL; ++i) {
1474                                 if (!strcmp(s, *keywords++))
1475                                         return -(i+1);
1476                         }
1477                 }
1478                 /*
1479                  * Look for a series of no more than "max_vals"
1480                  * numeric values separated by commas, in base10,
1481                  * or base16 when prefixed with "0x".
1482                  * Return a count of how many were found.
1483                  */
1484                 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1485                         vals[n] = i;
1486                         while ((i = stridx(decimal, *++s)) >= 0)
1487                                 vals[n] = (vals[n] * 10) + i;
1488                         if (*s == 'x' && !vals[n]) {
1489                                 while ((i = stridx(hex, *++s)) >= 0)
1490                                         vals[n] = (vals[n] * 0x10) + i;
1491                         }
1492                         if (++n == max_vals)
1493                                 break;
1494                         if (*s == ',' || *s == ';')
1495                                 ++s;
1496                 }
1497                 if (!*s)
1498                         return n;
1499         }
1500         return 0;       /* zero = nothing matched */
1501 }
1502
1503 #ifdef CONFIG_BLK_DEV_ALI14XX
1504 extern int probe_ali14xx;
1505 extern int ali14xx_init(void);
1506 #endif
1507 #ifdef CONFIG_BLK_DEV_UMC8672
1508 extern int probe_umc8672;
1509 extern int umc8672_init(void);
1510 #endif
1511 #ifdef CONFIG_BLK_DEV_DTC2278
1512 extern int probe_dtc2278;
1513 extern int dtc2278_init(void);
1514 #endif
1515 #ifdef CONFIG_BLK_DEV_HT6560B
1516 extern int probe_ht6560b;
1517 extern int ht6560b_init(void);
1518 #endif
1519 #ifdef CONFIG_BLK_DEV_QD65XX
1520 extern int probe_qd65xx;
1521 extern int qd65xx_init(void);
1522 #endif
1523
1524 static int __initdata is_chipset_set[MAX_HWIFS];
1525
1526 /*
1527  * ide_setup() gets called VERY EARLY during initialization,
1528  * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1529  *
1530  * Remember to update Documentation/ide.txt if you change something here.
1531  */
1532 static int __init ide_setup(char *s)
1533 {
1534         int i, vals[3];
1535         ide_hwif_t *hwif;
1536         ide_drive_t *drive;
1537         unsigned int hw, unit;
1538         const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1539         const char max_hwif  = '0' + (MAX_HWIFS - 1);
1540
1541
1542         if (strncmp(s,"hd",2) == 0 && s[2] == '=')      /* hd= is for hd.c   */
1543                 return 0;                               /* driver and not us */
1544
1545         if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1546                 return 0;
1547
1548         printk(KERN_INFO "ide_setup: %s", s);
1549         init_ide_data ();
1550
1551 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1552         if (!strcmp(s, "ide=doubler")) {
1553                 extern int ide_doubler;
1554
1555                 printk(" : Enabled support for IDE doublers\n");
1556                 ide_doubler = 1;
1557                 return 1;
1558         }
1559 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1560
1561         if (!strcmp(s, "ide=nodma")) {
1562                 printk(" : Prevented DMA\n");
1563                 noautodma = 1;
1564                 return 1;
1565         }
1566
1567 #ifdef CONFIG_BLK_DEV_IDEPCI
1568         if (!strcmp(s, "ide=reverse")) {
1569                 ide_scan_direction = 1;
1570                 printk(" : Enabled support for IDE inverse scan order.\n");
1571                 return 1;
1572         }
1573 #endif /* CONFIG_BLK_DEV_IDEPCI */
1574
1575 #ifdef CONFIG_BLK_DEV_IDEACPI
1576         if (!strcmp(s, "ide=noacpi")) {
1577                 //printk(" : Disable IDE ACPI support.\n");
1578                 ide_noacpi = 1;
1579                 return 1;
1580         }
1581         if (!strcmp(s, "ide=acpigtf")) {
1582                 //printk(" : Enable IDE ACPI _GTF support.\n");
1583                 ide_noacpitfs = 0;
1584                 return 1;
1585         }
1586         if (!strcmp(s, "ide=acpionboot")) {
1587                 //printk(" : Call IDE ACPI methods on boot.\n");
1588                 ide_noacpionboot = 0;
1589                 return 1;
1590         }
1591 #endif /* CONFIG_BLK_DEV_IDEACPI */
1592
1593         /*
1594          * Look for drive options:  "hdx="
1595          */
1596         if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1597                 const char *hd_words[] = {
1598                         "none", "noprobe", "nowerr", "cdrom", "minus5",
1599                         "autotune", "noautotune", "minus8", "swapdata", "bswap",
1600                         "noflush", "remap", "remap63", "scsi", NULL };
1601                 unit = s[2] - 'a';
1602                 hw   = unit / MAX_DRIVES;
1603                 unit = unit % MAX_DRIVES;
1604                 hwif = &ide_hwifs[hw];
1605                 drive = &hwif->drives[unit];
1606                 if (strncmp(s + 4, "ide-", 4) == 0) {
1607                         strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1608                         goto done;
1609                 }
1610                 switch (match_parm(&s[3], hd_words, vals, 3)) {
1611                         case -1: /* "none" */
1612                         case -2: /* "noprobe" */
1613                                 drive->noprobe = 1;
1614                                 goto done;
1615                         case -3: /* "nowerr" */
1616                                 drive->bad_wstat = BAD_R_STAT;
1617                                 hwif->noprobe = 0;
1618                                 goto done;
1619                         case -4: /* "cdrom" */
1620                                 drive->present = 1;
1621                                 drive->media = ide_cdrom;
1622                                 /* an ATAPI device ignores DRDY */
1623                                 drive->ready_stat = 0;
1624                                 hwif->noprobe = 0;
1625                                 goto done;
1626                         case -6: /* "autotune" */
1627                                 drive->autotune = IDE_TUNE_AUTO;
1628                                 goto obsolete_option;
1629                         case -7: /* "noautotune" */
1630                                 drive->autotune = IDE_TUNE_NOAUTO;
1631                                 goto obsolete_option;
1632                         case -9: /* "swapdata" */
1633                         case -10: /* "bswap" */
1634                                 drive->bswap = 1;
1635                                 goto done;
1636                         case -11: /* noflush */
1637                                 drive->noflush = 1;
1638                                 goto done;
1639                         case -12: /* "remap" */
1640                                 drive->remap_0_to_1 = 1;
1641                                 goto done;
1642                         case -13: /* "remap63" */
1643                                 drive->sect0 = 63;
1644                                 goto done;
1645                         case -14: /* "scsi" */
1646                                 drive->scsi = 1;
1647                                 goto done;
1648                         case 3: /* cyl,head,sect */
1649                                 drive->media    = ide_disk;
1650                                 drive->ready_stat = READY_STAT;
1651                                 drive->cyl      = drive->bios_cyl  = vals[0];
1652                                 drive->head     = drive->bios_head = vals[1];
1653                                 drive->sect     = drive->bios_sect = vals[2];
1654                                 drive->present  = 1;
1655                                 drive->forced_geom = 1;
1656                                 hwif->noprobe = 0;
1657                                 goto done;
1658                         default:
1659                                 goto bad_option;
1660                 }
1661         }
1662
1663         if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1664                 goto bad_option;
1665         /*
1666          * Look for bus speed option:  "idebus="
1667          */
1668         if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1669                 if (match_parm(&s[6], NULL, vals, 1) != 1)
1670                         goto bad_option;
1671                 if (vals[0] >= 20 && vals[0] <= 66) {
1672                         idebus_parameter = vals[0];
1673                 } else
1674                         printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1675                 goto done;
1676         }
1677         /*
1678          * Look for interface options:  "idex="
1679          */
1680         if (s[3] >= '0' && s[3] <= max_hwif) {
1681                 /*
1682                  * Be VERY CAREFUL changing this: note hardcoded indexes below
1683                  * (-8, -9, -10) are reserved to ease the hardcoding.
1684                  */
1685                 static const char *ide_words[] = {
1686                         "noprobe", "serialize", "minus3", "minus4",
1687                         "reset", "dma", "ata66", "minus8", "minus9",
1688                         "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1689                         "dtc2278", "umc8672", "ali14xx", NULL };
1690                 hw = s[3] - '0';
1691                 hwif = &ide_hwifs[hw];
1692                 i = match_parm(&s[4], ide_words, vals, 3);
1693
1694                 /*
1695                  * Cryptic check to ensure chipset not already set for hwif.
1696                  * Note: we can't depend on hwif->chipset here.
1697                  */
1698                 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1699                         /* chipset already specified */
1700                         if (is_chipset_set[hw])
1701                                 goto bad_option;
1702                         if (i > -18 && i <= -11) {
1703                                 /* these drivers are for "ide0=" only */
1704                                 if (hw != 0)
1705                                         goto bad_hwif;
1706                                 /* chipset already specified for 2nd port */
1707                                 if (is_chipset_set[hw+1])
1708                                         goto bad_option;
1709                         }
1710                         is_chipset_set[hw] = 1;
1711                         printk("\n");
1712                 }
1713
1714                 switch (i) {
1715 #ifdef CONFIG_BLK_DEV_ALI14XX
1716                         case -17: /* "ali14xx" */
1717                                 probe_ali14xx = 1;
1718                                 goto done;
1719 #endif
1720 #ifdef CONFIG_BLK_DEV_UMC8672
1721                         case -16: /* "umc8672" */
1722                                 probe_umc8672 = 1;
1723                                 goto done;
1724 #endif
1725 #ifdef CONFIG_BLK_DEV_DTC2278
1726                         case -15: /* "dtc2278" */
1727                                 probe_dtc2278 = 1;
1728                                 goto done;
1729 #endif
1730 #ifdef CONFIG_BLK_DEV_CMD640
1731                         case -14: /* "cmd640_vlb" */
1732                         {
1733                                 extern int cmd640_vlb; /* flag for cmd640.c */
1734                                 cmd640_vlb = 1;
1735                                 goto done;
1736                         }
1737 #endif
1738 #ifdef CONFIG_BLK_DEV_HT6560B
1739                         case -13: /* "ht6560b" */
1740                                 probe_ht6560b = 1;
1741                                 goto done;
1742 #endif
1743 #ifdef CONFIG_BLK_DEV_QD65XX
1744                         case -12: /* "qd65xx" */
1745                                 probe_qd65xx = 1;
1746                                 goto done;
1747 #endif
1748 #ifdef CONFIG_BLK_DEV_4DRIVES
1749                         case -11: /* "four" drives on one set of ports */
1750                         {
1751                                 ide_hwif_t *mate = &ide_hwifs[hw^1];
1752                                 mate->drives[0].select.all ^= 0x20;
1753                                 mate->drives[1].select.all ^= 0x20;
1754                                 hwif->chipset = mate->chipset = ide_4drives;
1755                                 mate->irq = hwif->irq;
1756                                 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1757                                 hwif->mate = mate;
1758                                 mate->mate = hwif;
1759                                 hwif->serialized = mate->serialized = 1;
1760                                 goto obsolete_option;
1761                         }
1762 #endif /* CONFIG_BLK_DEV_4DRIVES */
1763                         case -10: /* minus10 */
1764                         case -9: /* minus9 */
1765                         case -8: /* minus8 */
1766                         case -4:
1767                         case -3:
1768                                 goto bad_option;
1769                         case -7: /* ata66 */
1770 #ifdef CONFIG_BLK_DEV_IDEPCI
1771                                 hwif->udma_four = 1;
1772                                 goto obsolete_option;
1773 #else
1774                                 goto bad_hwif;
1775 #endif
1776                         case -6: /* dma */
1777                                 hwif->autodma = 1;
1778                                 goto obsolete_option;
1779                         case -5: /* "reset" */
1780                                 hwif->reset = 1;
1781                                 goto obsolete_option;
1782                         case -2: /* "serialize" */
1783                                 hwif->mate = &ide_hwifs[hw^1];
1784                                 hwif->mate->mate = hwif;
1785                                 hwif->serialized = hwif->mate->serialized = 1;
1786                                 goto obsolete_option;
1787
1788                         case -1: /* "noprobe" */
1789                                 hwif->noprobe = 1;
1790                                 goto done;
1791
1792                         case 1: /* base */
1793                                 vals[1] = vals[0] + 0x206; /* default ctl */
1794                         case 2: /* base,ctl */
1795                                 vals[2] = 0;    /* default irq = probe for it */
1796                         case 3: /* base,ctl,irq */
1797                                 hwif->hw.irq = vals[2];
1798                                 ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq);
1799                                 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
1800                                 hwif->irq      = vals[2];
1801                                 hwif->noprobe  = 0;
1802                                 hwif->chipset  = ide_forced;
1803                                 goto obsolete_option;
1804
1805                         case 0: goto bad_option;
1806                         default:
1807                                 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1808                                 return 1;
1809                 }
1810         }
1811 bad_option:
1812         printk(" -- BAD OPTION\n");
1813         return 1;
1814 obsolete_option:
1815         printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1816         return 1;
1817 bad_hwif:
1818         printk("-- NOT SUPPORTED ON ide%d", hw);
1819 done:
1820         printk("\n");
1821         return 1;
1822 }
1823
1824 extern void __init pnpide_init(void);
1825 extern void __exit pnpide_exit(void);
1826 extern void __init h8300_ide_init(void);
1827
1828 /*
1829  * probe_for_hwifs() finds/initializes "known" IDE interfaces
1830  */
1831 static void __init probe_for_hwifs (void)
1832 {
1833 #ifdef CONFIG_BLK_DEV_IDEPCI
1834         ide_scan_pcibus(ide_scan_direction);
1835 #endif /* CONFIG_BLK_DEV_IDEPCI */
1836
1837 #ifdef CONFIG_ETRAX_IDE
1838         {
1839                 extern void init_e100_ide(void);
1840                 init_e100_ide();
1841         }
1842 #endif /* CONFIG_ETRAX_IDE */
1843 #ifdef CONFIG_BLK_DEV_CMD640
1844         {
1845                 extern void ide_probe_for_cmd640x(void);
1846                 ide_probe_for_cmd640x();
1847         }
1848 #endif /* CONFIG_BLK_DEV_CMD640 */
1849 #ifdef CONFIG_BLK_DEV_IDE_PMAC
1850         {
1851                 extern int pmac_ide_probe(void);
1852                 (void)pmac_ide_probe();
1853         }
1854 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
1855 #ifdef CONFIG_BLK_DEV_GAYLE
1856         {
1857                 extern void gayle_init(void);
1858                 gayle_init();
1859         }
1860 #endif /* CONFIG_BLK_DEV_GAYLE */
1861 #ifdef CONFIG_BLK_DEV_FALCON_IDE
1862         {
1863                 extern void falconide_init(void);
1864                 falconide_init();
1865         }
1866 #endif /* CONFIG_BLK_DEV_FALCON_IDE */
1867 #ifdef CONFIG_BLK_DEV_MAC_IDE
1868         {
1869                 extern void macide_init(void);
1870                 macide_init();
1871         }
1872 #endif /* CONFIG_BLK_DEV_MAC_IDE */
1873 #ifdef CONFIG_BLK_DEV_Q40IDE
1874         {
1875                 extern void q40ide_init(void);
1876                 q40ide_init();
1877         }
1878 #endif /* CONFIG_BLK_DEV_Q40IDE */
1879 #ifdef CONFIG_BLK_DEV_BUDDHA
1880         {
1881                 extern void buddha_init(void);
1882                 buddha_init();
1883         }
1884 #endif /* CONFIG_BLK_DEV_BUDDHA */
1885 #ifdef CONFIG_BLK_DEV_IDEPNP
1886         pnpide_init();
1887 #endif
1888 #ifdef CONFIG_H8300
1889         h8300_ide_init();
1890 #endif
1891 }
1892
1893 void ide_register_subdriver(ide_drive_t *drive, ide_driver_t *driver)
1894 {
1895 #ifdef CONFIG_IDE_PROC_FS
1896         ide_add_proc_entries(drive->proc, driver->proc, drive);
1897 #endif
1898 }
1899
1900 EXPORT_SYMBOL(ide_register_subdriver);
1901
1902 /**
1903  *      ide_unregister_subdriver        -       disconnect drive from driver
1904  *      @drive: drive to unplug
1905  *      @driver: driver
1906  *
1907  *      Disconnect a drive from the driver it was attached to and then
1908  *      clean up the various proc files and other objects attached to it.
1909  *
1910  *      Takes ide_setting_sem and ide_lock.
1911  *      Caller must hold none of the locks.
1912  */
1913
1914 void ide_unregister_subdriver(ide_drive_t *drive, ide_driver_t *driver)
1915 {
1916         unsigned long flags;
1917
1918 #ifdef CONFIG_IDE_PROC_FS
1919         ide_remove_proc_entries(drive->proc, driver->proc);
1920 #endif
1921         down(&ide_setting_sem);
1922         spin_lock_irqsave(&ide_lock, flags);
1923         /*
1924          * ide_setting_sem protects the settings list
1925          * ide_lock protects the use of settings
1926          *
1927          * so we need to hold both, ide_settings_sem because we want to
1928          * modify the settings list, and ide_lock because we cannot take
1929          * a setting out that is being used.
1930          *
1931          * OTOH both ide_{read,write}_setting are only ever used under
1932          * ide_setting_sem.
1933          */
1934         auto_remove_settings(drive);
1935         spin_unlock_irqrestore(&ide_lock, flags);
1936         up(&ide_setting_sem);
1937 }
1938
1939 EXPORT_SYMBOL(ide_unregister_subdriver);
1940
1941 /*
1942  * Probe module
1943  */
1944
1945 EXPORT_SYMBOL(ide_lock);
1946
1947 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1948 {
1949         return 1;
1950 }
1951
1952 static char *media_string(ide_drive_t *drive)
1953 {
1954         switch (drive->media) {
1955         case ide_disk:
1956                 return "disk";
1957         case ide_cdrom:
1958                 return "cdrom";
1959         case ide_tape:
1960                 return "tape";
1961         case ide_floppy:
1962                 return "floppy";
1963         case ide_optical:
1964                 return "optical";
1965         default:
1966                 return "UNKNOWN";
1967         }
1968 }
1969
1970 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1971 {
1972         ide_drive_t *drive = to_ide_device(dev);
1973         return sprintf(buf, "%s\n", media_string(drive));
1974 }
1975
1976 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1977 {
1978         ide_drive_t *drive = to_ide_device(dev);
1979         return sprintf(buf, "%s\n", drive->name);
1980 }
1981
1982 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1983 {
1984         ide_drive_t *drive = to_ide_device(dev);
1985         return sprintf(buf, "ide:m-%s\n", media_string(drive));
1986 }
1987
1988 static struct device_attribute ide_dev_attrs[] = {
1989         __ATTR_RO(media),
1990         __ATTR_RO(drivename),
1991         __ATTR_RO(modalias),
1992         __ATTR_NULL
1993 };
1994
1995 static int ide_uevent(struct device *dev, char **envp, int num_envp,
1996                       char *buffer, int buffer_size)
1997 {
1998         ide_drive_t *drive = to_ide_device(dev);
1999         int i = 0;
2000         int length = 0;
2001
2002         add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
2003                        "MEDIA=%s", media_string(drive));
2004         add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
2005                        "DRIVENAME=%s", drive->name);
2006         add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
2007                        "MODALIAS=ide:m-%s", media_string(drive));
2008         envp[i] = NULL;
2009         return 0;
2010 }
2011
2012 static int generic_ide_probe(struct device *dev)
2013 {
2014         ide_drive_t *drive = to_ide_device(dev);
2015         ide_driver_t *drv = to_ide_driver(dev->driver);
2016
2017         return drv->probe ? drv->probe(drive) : -ENODEV;
2018 }
2019
2020 static int generic_ide_remove(struct device *dev)
2021 {
2022         ide_drive_t *drive = to_ide_device(dev);
2023         ide_driver_t *drv = to_ide_driver(dev->driver);
2024
2025         if (drv->remove)
2026                 drv->remove(drive);
2027
2028         return 0;
2029 }
2030
2031 static void generic_ide_shutdown(struct device *dev)
2032 {
2033         ide_drive_t *drive = to_ide_device(dev);
2034         ide_driver_t *drv = to_ide_driver(dev->driver);
2035
2036         if (dev->driver && drv->shutdown)
2037                 drv->shutdown(drive);
2038 }
2039
2040 struct bus_type ide_bus_type = {
2041         .name           = "ide",
2042         .match          = ide_bus_match,
2043         .uevent         = ide_uevent,
2044         .probe          = generic_ide_probe,
2045         .remove         = generic_ide_remove,
2046         .shutdown       = generic_ide_shutdown,
2047         .dev_attrs      = ide_dev_attrs,
2048         .suspend        = generic_ide_suspend,
2049         .resume         = generic_ide_resume,
2050 };
2051
2052 EXPORT_SYMBOL_GPL(ide_bus_type);
2053
2054 /*
2055  * This is gets invoked once during initialization, to set *everything* up
2056  */
2057 static int __init ide_init(void)
2058 {
2059         int ret;
2060
2061         printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
2062         system_bus_speed = ide_system_bus_speed();
2063
2064         ret = bus_register(&ide_bus_type);
2065         if (ret < 0) {
2066                 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
2067                 return ret;
2068         }
2069
2070         init_ide_data();
2071
2072 #ifdef CONFIG_IDE_PROC_FS
2073         proc_ide_root = proc_mkdir("ide", NULL);
2074 #endif
2075
2076 #ifdef CONFIG_BLK_DEV_ALI14XX
2077         if (probe_ali14xx)
2078                 (void)ali14xx_init();
2079 #endif
2080 #ifdef CONFIG_BLK_DEV_UMC8672
2081         if (probe_umc8672)
2082                 (void)umc8672_init();
2083 #endif
2084 #ifdef CONFIG_BLK_DEV_DTC2278
2085         if (probe_dtc2278)
2086                 (void)dtc2278_init();
2087 #endif
2088 #ifdef CONFIG_BLK_DEV_HT6560B
2089         if (probe_ht6560b)
2090                 (void)ht6560b_init();
2091 #endif
2092 #ifdef CONFIG_BLK_DEV_QD65XX
2093         if (probe_qd65xx)
2094                 (void)qd65xx_init();
2095 #endif
2096
2097         initializing = 1;
2098         /* Probe for special PCI and other "known" interface chipsets. */
2099         probe_for_hwifs();
2100         initializing = 0;
2101
2102         proc_ide_create();
2103
2104         return 0;
2105 }
2106
2107 #ifdef MODULE
2108 static char *options = NULL;
2109 module_param(options, charp, 0);
2110 MODULE_LICENSE("GPL");
2111
2112 static void __init parse_options (char *line)
2113 {
2114         char *next = line;
2115
2116         if (line == NULL || !*line)
2117                 return;
2118         while ((line = next) != NULL) {
2119                 if ((next = strchr(line,' ')) != NULL)
2120                         *next++ = 0;
2121                 if (!ide_setup(line))
2122                         printk (KERN_INFO "Unknown option '%s'\n", line);
2123         }
2124 }
2125
2126 int __init init_module (void)
2127 {
2128         parse_options(options);
2129         return ide_init();
2130 }
2131
2132 void __exit cleanup_module (void)
2133 {
2134         int index;
2135
2136         for (index = 0; index < MAX_HWIFS; ++index)
2137                 ide_unregister(index);
2138
2139 #ifdef CONFIG_BLK_DEV_IDEPNP
2140         pnpide_exit();
2141 #endif
2142
2143         proc_ide_destroy();
2144
2145         bus_unregister(&ide_bus_type);
2146 }
2147
2148 #else /* !MODULE */
2149
2150 __setup("", ide_setup);
2151
2152 module_init(ide_init);
2153
2154 #endif /* MODULE */