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_add_setting       -       add an ide setting option
 830  *      @drive: drive to use
 831  *      @name: setting name
 832  *      @rw: true if the function is read 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 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->data_type = data_type;
 867         setting->min = min;
 868         setting->max = max;
 869         setting->mul_factor = mul_factor;
 870         setting->div_factor = div_factor;
 871         setting->data = data;
 872         setting->set = set;
 873
 874         setting->next = *p;
 875         if (auto_remove)
 876                 setting->auto_remove = 1;
 877         *p = setting;
 878         up(&ide_setting_sem);
 879         return 0;
 880 abort:
 881         up(&ide_setting_sem);
 882         kfree(setting);
 883         return -1;
 884 }
 885
 886 int ide_add_setting(ide_drive_t *drive, const char *name, int rw, int data_type, int min, int max, int mul_factor, int div_factor, void *data, ide_procset_t *set)
 887 {
 888         return __ide_add_setting(drive, name, rw, data_type, min, max, mul_factor, div_factor, data, set, 1);
 889 }
 890
 891 EXPORT_SYMBOL(ide_add_setting);
 892
 893 /**
 894  *      __ide_remove_setting    -       remove an ide setting option
 895  *      @drive: drive to use
 896  *      @name: setting name
 897  *
 898  *      Removes the setting named from the device if it is present.
 899  *      The caller must hold the setting semaphore.
 900  */
 901
 902 static void __ide_remove_setting (ide_drive_t *drive, char *name)
 903 {
 904         ide_settings_t **p, *setting;
 905
 906         p = (ide_settings_t **) &drive->settings;
 907
 908         while ((*p) && strcmp((*p)->name, name))
 909                 p = &((*p)->next);
 910         if ((setting = (*p)) == NULL)
 911                 return;
 912
 913         (*p) = setting->next;
 914
 915         kfree(setting->name);
 916         kfree(setting);
 917 }
 918
 919 /**
 920  *      ide_find_setting_by_name        -       find a drive specific setting
 921  *      @drive: drive to scan
 922  *      @name: setting name
 923  *
 924  *      Scan's the device setting table for a matching entry and returns
 925  *      this or NULL if no entry is found. The caller must hold the
 926  *      setting semaphore
 927  */
 928
 929 ide_settings_t *ide_find_setting_by_name (ide_drive_t *drive, char *name)
 930 {
 931         ide_settings_t *setting = drive->settings;
 932
 933         while (setting) {
 934                 if (strcmp(setting->name, name) == 0)
 935                         break;
 936                 setting = setting->next;
 937         }
 938         return setting;
 939 }
 940
 941 /**
 942  *      auto_remove_settings    -       remove driver specific settings
 943  *      @drive: drive
 944  *
 945  *      Automatically remove all the driver specific settings for this
 946  *      drive. This function may not be called from IRQ context. The
 947  *      caller must hold ide_setting_sem.
 948  */
 949
 950 static void auto_remove_settings (ide_drive_t *drive)
 951 {
 952         ide_settings_t *setting;
 953 repeat:
 954         setting = drive->settings;
 955         while (setting) {
 956                 if (setting->auto_remove) {
 957                         __ide_remove_setting(drive, setting->name);
 958                         goto repeat;
 959                 }
 960                 setting = setting->next;
 961         }
 962 }
 963
 964 /**
 965  *      ide_read_setting        -       read an IDE setting
 966  *      @drive: drive to read from
 967  *      @setting: drive setting
 968  *
 969  *      Read a drive setting and return the value. The caller
 970  *      must hold the ide_setting_sem when making this call.
 971  *
 972  *      BUGS: the data return and error are the same return value
 973  *      so an error -EINVAL and true return of the same value cannot
 974  *      be told apart
 975  */
 976
 977 int ide_read_setting (ide_drive_t *drive, ide_settings_t *setting)
 978 {
 979         int             val = -EINVAL;
 980         unsigned long   flags;
 981
 982         if ((setting->rw & SETTING_READ)) {
 983                 spin_lock_irqsave(&ide_lock, flags);
 984                 switch(setting->data_type) {
 985                         case TYPE_BYTE:
 986                                 val = *((u8 *) setting->data);
 987                                 break;
 988                         case TYPE_SHORT:
 989                                 val = *((u16 *) setting->data);
 990                                 break;
 991                         case TYPE_INT:
 992                                 val = *((u32 *) setting->data);
 993                                 break;
 994                 }
 995                 spin_unlock_irqrestore(&ide_lock, flags);
 996         }
 997         return val;
 998 }
 999
1000 /**
1001  *      ide_spin_wait_hwgroup   -       wait for group
1002  *      @drive: drive in the group
1003  *
1004  *      Wait for an IDE device group to go non busy and then return
1005  *      holding the ide_lock which guards the hwgroup->busy status
1006  *      and right to use it.
1007  */
1008
1009 int ide_spin_wait_hwgroup (ide_drive_t *drive)
1010 {
1011         ide_hwgroup_t *hwgroup = HWGROUP(drive);
1012         unsigned long timeout = jiffies + (3 * HZ);
1013
1014         spin_lock_irq(&ide_lock);
1015
1016         while (hwgroup->busy) {
1017                 unsigned long lflags;
1018                 spin_unlock_irq(&ide_lock);
1019                 local_irq_set(lflags);
1020                 if (time_after(jiffies, timeout)) {
1021                         local_irq_restore(lflags);
1022                         printk(KERN_ERR "%s: channel busy\n", drive->name);
1023                         return -EBUSY;
1024                 }
1025                 local_irq_restore(lflags);
1026                 spin_lock_irq(&ide_lock);
1027         }
1028         return 0;
1029 }
1030
1031 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
1032
1033 /**
1034  *      ide_write_setting       -       read an IDE setting
1035  *      @drive: drive to read from
1036  *      @setting: drive setting
1037  *      @val: value
1038  *
1039  *      Write a drive setting if it is possible. The caller
1040  *      must hold the ide_setting_sem when making this call.
1041  *
1042  *      BUGS: the data return and error are the same return value
1043  *      so an error -EINVAL and true return of the same value cannot
1044  *      be told apart
1045  *
1046  *      FIXME:  This should be changed to enqueue a special request
1047  *      to the driver to change settings, and then wait on a sema for completion.
1048  *      The current scheme of polling is kludgy, though safe enough.
1049  */
1050
1051 int ide_write_setting (ide_drive_t *drive, ide_settings_t *setting, int val)
1052 {
1053         if (!capable(CAP_SYS_ADMIN))
1054                 return -EACCES;
1055         if (setting->set)
1056                 return setting->set(drive, val);
1057         if (!(setting->rw & SETTING_WRITE))
1058                 return -EPERM;
1059         if (val < setting->min || val > setting->max)
1060                 return -EINVAL;
1061         if (ide_spin_wait_hwgroup(drive))
1062                 return -EBUSY;
1063         switch (setting->data_type) {
1064                 case TYPE_BYTE:
1065                         *((u8 *) setting->data) = val;
1066                         break;
1067                 case TYPE_SHORT:
1068                         *((u16 *) setting->data) = val;
1069                         break;
1070                 case TYPE_INT:
1071                         *((u32 *) setting->data) = val;
1072                         break;
1073         }
1074         spin_unlock_irq(&ide_lock);
1075         return 0;
1076 }
1077
1078 static int set_io_32bit(ide_drive_t *drive, int arg)
1079 {
1080         if (drive->no_io_32bit)
1081                 return -EPERM;
1082
1083         if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
1084                 return -EINVAL;
1085
1086         drive->io_32bit = arg;
1087 #ifdef CONFIG_BLK_DEV_DTC2278
1088         if (HWIF(drive)->chipset == ide_dtc2278)
1089                 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
1090 #endif /* CONFIG_BLK_DEV_DTC2278 */
1091         return 0;
1092 }
1093
1094 static int set_ksettings(ide_drive_t *drive, int arg)
1095 {
1096         if (arg < 0 || arg > 1)
1097                 return -EINVAL;
1098
1099         if (ide_spin_wait_hwgroup(drive))
1100                 return -EBUSY;
1101         drive->keep_settings = arg;
1102         spin_unlock_irq(&ide_lock);
1103
1104         return 0;
1105 }
1106
1107 static int set_using_dma (ide_drive_t *drive, int arg)
1108 {
1109 #ifdef CONFIG_BLK_DEV_IDEDMA
1110         ide_hwif_t *hwif = drive->hwif;
1111         int err = -EPERM;
1112
1113         if (arg < 0 || arg > 1)
1114                 return -EINVAL;
1115
1116         if (!drive->id || !(drive->id->capability & 1))
1117                 goto out;
1118
1119         if (hwif->ide_dma_check == NULL)
1120                 goto out;
1121
1122         err = -EBUSY;
1123         if (ide_spin_wait_hwgroup(drive))
1124                 goto out;
1125         /*
1126          * set ->busy flag, unlock and let it ride
1127          */
1128         hwif->hwgroup->busy = 1;
1129         spin_unlock_irq(&ide_lock);
1130
1131         err = 0;
1132
1133         if (arg) {
1134                 if (ide_set_dma(drive) || hwif->ide_dma_on(drive))
1135                         err = -EIO;
1136         } else
1137                 ide_dma_off(drive);
1138
1139         /*
1140          * lock, clear ->busy flag and unlock before leaving
1141          */
1142         spin_lock_irq(&ide_lock);
1143         hwif->hwgroup->busy = 0;
1144         spin_unlock_irq(&ide_lock);
1145 out:
1146         return err;
1147 #else
1148         if (arg < 0 || arg > 1)
1149                 return -EINVAL;
1150
1151         return -EPERM;
1152 #endif
1153 }
1154
1155 static int set_pio_mode (ide_drive_t *drive, int arg)
1156 {
1157         struct request rq;
1158
1159         if (arg < 0 || arg > 255)
1160                 return -EINVAL;
1161
1162         if (!HWIF(drive)->tuneproc)
1163                 return -ENOSYS;
1164         if (drive->special.b.set_tune)
1165                 return -EBUSY;
1166         ide_init_drive_cmd(&rq);
1167         drive->tune_req = (u8) arg;
1168         drive->special.b.set_tune = 1;
1169         (void) ide_do_drive_cmd(drive, &rq, ide_wait);
1170         return 0;
1171 }
1172
1173 static int set_unmaskirq(ide_drive_t *drive, int arg)
1174 {
1175         if (drive->no_unmask)
1176                 return -EPERM;
1177
1178         if (arg < 0 || arg > 1)
1179                 return -EINVAL;
1180
1181         if (ide_spin_wait_hwgroup(drive))
1182                 return -EBUSY;
1183         drive->unmask = arg;
1184         spin_unlock_irq(&ide_lock);
1185
1186         return 0;
1187 }
1188
1189 static int set_xfer_rate (ide_drive_t *drive, int arg)
1190 {
1191         int err;
1192
1193         if (arg < 0 || arg > 70)
1194                 return -EINVAL;
1195
1196         err = ide_wait_cmd(drive,
1197                         WIN_SETFEATURES, (u8) arg,
1198                         SETFEATURES_XFER, 0, NULL);
1199
1200         if (!err && arg) {
1201                 ide_set_xfer_rate(drive, (u8) arg);
1202                 ide_driveid_update(drive);
1203         }
1204         return err;
1205 }
1206
1207 /**
1208  *      ide_add_generic_settings        -       generic ide settings
1209  *      @drive: drive being configured
1210  *
1211  *      Add the generic parts of the system settings to the /proc files.
1212  *      The caller must not be holding the ide_setting_sem.
1213  */
1214
1215 void ide_add_generic_settings (ide_drive_t *drive)
1216 {
1217 /*
1218  *                        drive         setting name            read/write access                               data type       min     max                             mul_factor      div_factor      data pointer                    set function
1219  */
1220         __ide_add_setting(drive,        "io_32bit",             drive->no_io_32bit ? SETTING_READ : SETTING_RW, TYPE_BYTE,      0,      1 + (SUPPORT_VLB_SYNC << 1),    1,              1,              &drive->io_32bit,               set_io_32bit,   0);
1221         __ide_add_setting(drive,        "keepsettings",         SETTING_RW,                                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->keep_settings,          NULL,           0);
1222         __ide_add_setting(drive,        "nice1",                SETTING_RW,                                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->nice1,                  NULL,           0);
1223         __ide_add_setting(drive,        "pio_mode",             SETTING_WRITE,                                  TYPE_BYTE,      0,      255,                            1,              1,              NULL,                           set_pio_mode,   0);
1224         __ide_add_setting(drive,        "unmaskirq",            drive->no_unmask ? SETTING_READ : SETTING_RW,   TYPE_BYTE,      0,      1,                              1,              1,              &drive->unmask,                 NULL,           0);
1225         __ide_add_setting(drive,        "using_dma",            SETTING_RW,                                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->using_dma,              set_using_dma,  0);
1226         __ide_add_setting(drive,        "init_speed",           SETTING_RW,                                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->init_speed,             NULL,           0);
1227         __ide_add_setting(drive,        "current_speed",        SETTING_RW,                                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->current_speed,          set_xfer_rate,  0);
1228         __ide_add_setting(drive,        "number",               SETTING_RW,                                     TYPE_BYTE,      0,      3,                              1,              1,              &drive->dn,                     NULL,           0);
1229 }
1230
1231 /**
1232  *      system_bus_clock        -       clock guess
1233  *
1234  *      External version of the bus clock guess used by very old IDE drivers
1235  *      for things like VLB timings. Should not be used.
1236  */
1237
1238 int system_bus_clock (void)
1239 {
1240         return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
1241 }
1242
1243 EXPORT_SYMBOL(system_bus_clock);
1244
1245 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
1246 {
1247         ide_drive_t *drive = dev->driver_data;
1248         ide_hwif_t *hwif = HWIF(drive);
1249         struct request rq;
1250         struct request_pm_state rqpm;
1251         ide_task_t args;
1252
1253         /* Call ACPI _GTM only once */
1254         if (!(drive->dn % 2))
1255                 ide_acpi_get_timing(hwif);
1256
1257         memset(&rq, 0, sizeof(rq));
1258         memset(&rqpm, 0, sizeof(rqpm));
1259         memset(&args, 0, sizeof(args));
1260         rq.cmd_type = REQ_TYPE_PM_SUSPEND;
1261         rq.special = &args;
1262         rq.data = &rqpm;
1263         rqpm.pm_step = ide_pm_state_start_suspend;
1264         if (mesg.event == PM_EVENT_PRETHAW)
1265                 mesg.event = PM_EVENT_FREEZE;
1266         rqpm.pm_state = mesg.event;
1267
1268         return ide_do_drive_cmd(drive, &rq, ide_wait);
1269 }
1270
1271 static int generic_ide_resume(struct device *dev)
1272 {
1273         ide_drive_t *drive = dev->driver_data;
1274         ide_hwif_t *hwif = HWIF(drive);
1275         struct request rq;
1276         struct request_pm_state rqpm;
1277         ide_task_t args;
1278
1279         /* Call ACPI _STM only once */
1280         if (!(drive->dn % 2))
1281                 ide_acpi_push_timing(hwif);
1282
1283         ide_acpi_exec_tfs(drive);
1284
1285         memset(&rq, 0, sizeof(rq));
1286         memset(&rqpm, 0, sizeof(rqpm));
1287         memset(&args, 0, sizeof(args));
1288         rq.cmd_type = REQ_TYPE_PM_RESUME;
1289         rq.special = &args;
1290         rq.data = &rqpm;
1291         rqpm.pm_step = ide_pm_state_start_resume;
1292         rqpm.pm_state = PM_EVENT_ON;
1293
1294         return ide_do_drive_cmd(drive, &rq, ide_head_wait);
1295 }
1296
1297 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
1298                         unsigned int cmd, unsigned long arg)
1299 {
1300         unsigned long flags;
1301         ide_driver_t *drv;
1302         void __user *p = (void __user *)arg;
1303         int err = 0, (*setfunc)(ide_drive_t *, int);
1304         u8 *val;
1305
1306         switch (cmd) {
1307         case HDIO_GET_32BIT:        val = &drive->io_32bit;      goto read_val;
1308         case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
1309         case HDIO_GET_UNMASKINTR:   val = &drive->unmask;        goto read_val;
1310         case HDIO_GET_DMA:          val = &drive->using_dma;     goto read_val;
1311         case HDIO_SET_32BIT:        setfunc = set_io_32bit;      goto set_val;
1312         case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings;     goto set_val;
1313         case HDIO_SET_PIO_MODE:     setfunc = set_pio_mode;      goto set_val;
1314         case HDIO_SET_UNMASKINTR:   setfunc = set_unmaskirq;     goto set_val;
1315         case HDIO_SET_DMA:          setfunc = set_using_dma;     goto set_val;
1316         }
1317
1318         switch (cmd) {
1319                 case HDIO_OBSOLETE_IDENTITY:
1320                 case HDIO_GET_IDENTITY:
1321                         if (bdev != bdev->bd_contains)
1322                                 return -EINVAL;
1323                         if (drive->id_read == 0)
1324                                 return -ENOMSG;
1325                         if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1326                                 return -EFAULT;
1327                         return 0;
1328
1329                 case HDIO_GET_NICE:
1330                         return put_user(drive->dsc_overlap      <<      IDE_NICE_DSC_OVERLAP    |
1331                                         drive->atapi_overlap    <<      IDE_NICE_ATAPI_OVERLAP  |
1332                                         drive->nice0            <<      IDE_NICE_0              |
1333                                         drive->nice1            <<      IDE_NICE_1              |
1334                                         drive->nice2            <<      IDE_NICE_2,
1335                                         (long __user *) arg);
1336
1337 #ifdef CONFIG_IDE_TASK_IOCTL
1338                 case HDIO_DRIVE_TASKFILE:
1339                         if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1340                                 return -EACCES;
1341                         switch(drive->media) {
1342                                 case ide_disk:
1343                                         return ide_taskfile_ioctl(drive, cmd, arg);
1344                                 default:
1345                                         return -ENOMSG;
1346                         }
1347 #endif /* CONFIG_IDE_TASK_IOCTL */
1348
1349                 case HDIO_DRIVE_CMD:
1350                         if (!capable(CAP_SYS_RAWIO))
1351                                 return -EACCES;
1352                         return ide_cmd_ioctl(drive, cmd, arg);
1353
1354                 case HDIO_DRIVE_TASK:
1355                         if (!capable(CAP_SYS_RAWIO))
1356                                 return -EACCES;
1357                         return ide_task_ioctl(drive, cmd, arg);
1358
1359                 case HDIO_SCAN_HWIF:
1360                 {
1361                         hw_regs_t hw;
1362                         int args[3];
1363                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1364                         if (copy_from_user(args, p, 3 * sizeof(int)))
1365                                 return -EFAULT;
1366                         memset(&hw, 0, sizeof(hw));
1367                         ide_init_hwif_ports(&hw, (unsigned long) args[0],
1368                                             (unsigned long) args[1], NULL);
1369                         hw.irq = args[2];
1370                         if (ide_register_hw(&hw, NULL) == -1)
1371                                 return -EIO;
1372                         return 0;
1373                 }
1374                 case HDIO_UNREGISTER_HWIF:
1375                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1376                         /* (arg > MAX_HWIFS) checked in function */
1377                         ide_unregister(arg);
1378                         return 0;
1379                 case HDIO_SET_NICE:
1380                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1381                         if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1382                                 return -EPERM;
1383                         drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1384                         drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1385                         if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1386                                 drive->dsc_overlap = 0;
1387                                 return -EPERM;
1388                         }
1389                         drive->nice1 = (arg >> IDE_NICE_1) & 1;
1390                         return 0;
1391                 case HDIO_DRIVE_RESET:
1392                 {
1393                         unsigned long flags;
1394                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1395
1396                         /*
1397                          *      Abort the current command on the
1398                          *      group if there is one, taking
1399                          *      care not to allow anything else
1400                          *      to be queued and to die on the
1401                          *      spot if we miss one somehow
1402                          */
1403
1404                         spin_lock_irqsave(&ide_lock, flags);
1405
1406                         if (HWGROUP(drive)->resetting) {
1407                                 spin_unlock_irqrestore(&ide_lock, flags);
1408                                 return -EBUSY;
1409                         }
1410
1411                         ide_abort(drive, "drive reset");
1412
1413                         BUG_ON(HWGROUP(drive)->handler);
1414
1415                         /* Ensure nothing gets queued after we
1416                            drop the lock. Reset will clear the busy */
1417
1418                         HWGROUP(drive)->busy = 1;
1419                         spin_unlock_irqrestore(&ide_lock, flags);
1420                         (void) ide_do_reset(drive);
1421
1422                         return 0;
1423                 }
1424
1425                 case CDROMEJECT:
1426                 case CDROMCLOSETRAY:
1427                         return scsi_cmd_ioctl(file, bdev->bd_disk, cmd, p);
1428
1429                 case HDIO_GET_BUSSTATE:
1430                         if (!capable(CAP_SYS_ADMIN))
1431                                 return -EACCES;
1432                         if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1433                                 return -EFAULT;
1434                         return 0;
1435
1436                 case HDIO_SET_BUSSTATE:
1437                         if (!capable(CAP_SYS_ADMIN))
1438                                 return -EACCES;
1439                         if (HWIF(drive)->busproc)
1440                                 return HWIF(drive)->busproc(drive, (int)arg);
1441                         return -EOPNOTSUPP;
1442                 default:
1443                         return -EINVAL;
1444         }
1445
1446 read_val:
1447         down(&ide_setting_sem);
1448         spin_lock_irqsave(&ide_lock, flags);
1449         err = *val;
1450         spin_unlock_irqrestore(&ide_lock, flags);
1451         up(&ide_setting_sem);
1452         return err >= 0 ? put_user(err, (long __user *)arg) : err;
1453
1454 set_val:
1455         if (bdev != bdev->bd_contains)
1456                 err = -EINVAL;
1457         else {
1458                 if (!capable(CAP_SYS_ADMIN))
1459                         err = -EACCES;
1460                 else {
1461                         down(&ide_setting_sem);
1462                         err = setfunc(drive, arg);
1463                         up(&ide_setting_sem);
1464                 }
1465         }
1466         return err;
1467 }
1468
1469 EXPORT_SYMBOL(generic_ide_ioctl);
1470
1471 /*
1472  * stridx() returns the offset of c within s,
1473  * or -1 if c is '\0' or not found within s.
1474  */
1475 static int __init stridx (const char *s, char c)
1476 {
1477         char *i = strchr(s, c);
1478         return (i && c) ? i - s : -1;
1479 }
1480
1481 /*
1482  * match_parm() does parsing for ide_setup():
1483  *
1484  * 1. the first char of s must be '='.
1485  * 2. if the remainder matches one of the supplied keywords,
1486  *     the index (1 based) of the keyword is negated and returned.
1487  * 3. if the remainder is a series of no more than max_vals numbers
1488  *     separated by commas, the numbers are saved in vals[] and a
1489  *     count of how many were saved is returned.  Base10 is assumed,
1490  *     and base16 is allowed when prefixed with "0x".
1491  * 4. otherwise, zero is returned.
1492  */
1493 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1494 {
1495         static const char *decimal = "0123456789";
1496         static const char *hex = "0123456789abcdef";
1497         int i, n;
1498
1499         if (*s++ == '=') {
1500                 /*
1501                  * Try matching against the supplied keywords,
1502                  * and return -(index+1) if we match one
1503                  */
1504                 if (keywords != NULL) {
1505                         for (i = 0; *keywords != NULL; ++i) {
1506                                 if (!strcmp(s, *keywords++))
1507                                         return -(i+1);
1508                         }
1509                 }
1510                 /*
1511                  * Look for a series of no more than "max_vals"
1512                  * numeric values separated by commas, in base10,
1513                  * or base16 when prefixed with "0x".
1514                  * Return a count of how many were found.
1515                  */
1516                 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1517                         vals[n] = i;
1518                         while ((i = stridx(decimal, *++s)) >= 0)
1519                                 vals[n] = (vals[n] * 10) + i;
1520                         if (*s == 'x' && !vals[n]) {
1521                                 while ((i = stridx(hex, *++s)) >= 0)
1522                                         vals[n] = (vals[n] * 0x10) + i;
1523                         }
1524                         if (++n == max_vals)
1525                                 break;
1526                         if (*s == ',' || *s == ';')
1527                                 ++s;
1528                 }
1529                 if (!*s)
1530                         return n;
1531         }
1532         return 0;       /* zero = nothing matched */
1533 }
1534
1535 #ifdef CONFIG_BLK_DEV_ALI14XX
1536 extern int probe_ali14xx;
1537 extern int ali14xx_init(void);
1538 #endif
1539 #ifdef CONFIG_BLK_DEV_UMC8672
1540 extern int probe_umc8672;
1541 extern int umc8672_init(void);
1542 #endif
1543 #ifdef CONFIG_BLK_DEV_DTC2278
1544 extern int probe_dtc2278;
1545 extern int dtc2278_init(void);
1546 #endif
1547 #ifdef CONFIG_BLK_DEV_HT6560B
1548 extern int probe_ht6560b;
1549 extern int ht6560b_init(void);
1550 #endif
1551 #ifdef CONFIG_BLK_DEV_QD65XX
1552 extern int probe_qd65xx;
1553 extern int qd65xx_init(void);
1554 #endif
1555
1556 static int __initdata is_chipset_set[MAX_HWIFS];
1557
1558 /*
1559  * ide_setup() gets called VERY EARLY during initialization,
1560  * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1561  *
1562  * Remember to update Documentation/ide.txt if you change something here.
1563  */
1564 static int __init ide_setup(char *s)
1565 {
1566         int i, vals[3];
1567         ide_hwif_t *hwif;
1568         ide_drive_t *drive;
1569         unsigned int hw, unit;
1570         const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1571         const char max_hwif  = '0' + (MAX_HWIFS - 1);
1572
1573
1574         if (strncmp(s,"hd",2) == 0 && s[2] == '=')      /* hd= is for hd.c   */
1575                 return 0;                               /* driver and not us */
1576
1577         if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1578                 return 0;
1579
1580         printk(KERN_INFO "ide_setup: %s", s);
1581         init_ide_data ();
1582
1583 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1584         if (!strcmp(s, "ide=doubler")) {
1585                 extern int ide_doubler;
1586
1587                 printk(" : Enabled support for IDE doublers\n");
1588                 ide_doubler = 1;
1589                 return 1;
1590         }
1591 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1592
1593         if (!strcmp(s, "ide=nodma")) {
1594                 printk(" : Prevented DMA\n");
1595                 noautodma = 1;
1596                 return 1;
1597         }
1598
1599 #ifdef CONFIG_BLK_DEV_IDEPCI
1600         if (!strcmp(s, "ide=reverse")) {
1601                 ide_scan_direction = 1;
1602                 printk(" : Enabled support for IDE inverse scan order.\n");
1603                 return 1;
1604         }
1605 #endif /* CONFIG_BLK_DEV_IDEPCI */
1606
1607 #ifdef CONFIG_BLK_DEV_IDEACPI
1608         if (!strcmp(s, "ide=noacpi")) {
1609                 //printk(" : Disable IDE ACPI support.\n");
1610                 ide_noacpi = 1;
1611                 return 1;
1612         }
1613         if (!strcmp(s, "ide=acpigtf")) {
1614                 //printk(" : Enable IDE ACPI _GTF support.\n");
1615                 ide_noacpitfs = 0;
1616                 return 1;
1617         }
1618         if (!strcmp(s, "ide=acpionboot")) {
1619                 //printk(" : Call IDE ACPI methods on boot.\n");
1620                 ide_noacpionboot = 0;
1621                 return 1;
1622         }
1623 #endif /* CONFIG_BLK_DEV_IDEACPI */
1624
1625         /*
1626          * Look for drive options:  "hdx="
1627          */
1628         if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1629                 const char *hd_words[] = {
1630                         "none", "noprobe", "nowerr", "cdrom", "minus5",
1631                         "autotune", "noautotune", "minus8", "swapdata", "bswap",
1632                         "noflush", "remap", "remap63", "scsi", NULL };
1633                 unit = s[2] - 'a';
1634                 hw   = unit / MAX_DRIVES;
1635                 unit = unit % MAX_DRIVES;
1636                 hwif = &ide_hwifs[hw];
1637                 drive = &hwif->drives[unit];
1638                 if (strncmp(s + 4, "ide-", 4) == 0) {
1639                         strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1640                         goto done;
1641                 }
1642                 switch (match_parm(&s[3], hd_words, vals, 3)) {
1643                         case -1: /* "none" */
1644                         case -2: /* "noprobe" */
1645                                 drive->noprobe = 1;
1646                                 goto done;
1647                         case -3: /* "nowerr" */
1648                                 drive->bad_wstat = BAD_R_STAT;
1649                                 hwif->noprobe = 0;
1650                                 goto done;
1651                         case -4: /* "cdrom" */
1652                                 drive->present = 1;
1653                                 drive->media = ide_cdrom;
1654                                 /* an ATAPI device ignores DRDY */
1655                                 drive->ready_stat = 0;
1656                                 hwif->noprobe = 0;
1657                                 goto done;
1658                         case -6: /* "autotune" */
1659                                 drive->autotune = IDE_TUNE_AUTO;
1660                                 goto obsolete_option;
1661                         case -7: /* "noautotune" */
1662                                 drive->autotune = IDE_TUNE_NOAUTO;
1663                                 goto obsolete_option;
1664                         case -9: /* "swapdata" */
1665                         case -10: /* "bswap" */
1666                                 drive->bswap = 1;
1667                                 goto done;
1668                         case -11: /* noflush */
1669                                 drive->noflush = 1;
1670                                 goto done;
1671                         case -12: /* "remap" */
1672                                 drive->remap_0_to_1 = 1;
1673                                 goto done;
1674                         case -13: /* "remap63" */
1675                                 drive->sect0 = 63;
1676                                 goto done;
1677                         case -14: /* "scsi" */
1678                                 drive->scsi = 1;
1679                                 goto done;
1680                         case 3: /* cyl,head,sect */
1681                                 drive->media    = ide_disk;
1682                                 drive->ready_stat = READY_STAT;
1683                                 drive->cyl      = drive->bios_cyl  = vals[0];
1684                                 drive->head     = drive->bios_head = vals[1];
1685                                 drive->sect     = drive->bios_sect = vals[2];
1686                                 drive->present  = 1;
1687                                 drive->forced_geom = 1;
1688                                 hwif->noprobe = 0;
1689                                 goto done;
1690                         default:
1691                                 goto bad_option;
1692                 }
1693         }
1694
1695         if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1696                 goto bad_option;
1697         /*
1698          * Look for bus speed option:  "idebus="
1699          */
1700         if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1701                 if (match_parm(&s[6], NULL, vals, 1) != 1)
1702                         goto bad_option;
1703                 if (vals[0] >= 20 && vals[0] <= 66) {
1704                         idebus_parameter = vals[0];
1705                 } else
1706                         printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1707                 goto done;
1708         }
1709         /*
1710          * Look for interface options:  "idex="
1711          */
1712         if (s[3] >= '0' && s[3] <= max_hwif) {
1713                 /*
1714                  * Be VERY CAREFUL changing this: note hardcoded indexes below
1715                  * (-8, -9, -10) are reserved to ease the hardcoding.
1716                  */
1717                 static const char *ide_words[] = {
1718                         "noprobe", "serialize", "minus3", "minus4",
1719                         "reset", "dma", "ata66", "minus8", "minus9",
1720                         "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1721                         "dtc2278", "umc8672", "ali14xx", NULL };
1722                 hw = s[3] - '0';
1723                 hwif = &ide_hwifs[hw];
1724                 i = match_parm(&s[4], ide_words, vals, 3);
1725
1726                 /*
1727                  * Cryptic check to ensure chipset not already set for hwif.
1728                  * Note: we can't depend on hwif->chipset here.
1729                  */
1730                 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1731                         /* chipset already specified */
1732                         if (is_chipset_set[hw])
1733                                 goto bad_option;
1734                         if (i > -18 && i <= -11) {
1735                                 /* these drivers are for "ide0=" only */
1736                                 if (hw != 0)
1737                                         goto bad_hwif;
1738                                 /* chipset already specified for 2nd port */
1739                                 if (is_chipset_set[hw+1])
1740                                         goto bad_option;
1741                         }
1742                         is_chipset_set[hw] = 1;
1743                         printk("\n");
1744                 }
1745
1746                 switch (i) {
1747 #ifdef CONFIG_BLK_DEV_ALI14XX
1748                         case -17: /* "ali14xx" */
1749                                 probe_ali14xx = 1;
1750                                 goto done;
1751 #endif
1752 #ifdef CONFIG_BLK_DEV_UMC8672
1753                         case -16: /* "umc8672" */
1754                                 probe_umc8672 = 1;
1755                                 goto done;
1756 #endif
1757 #ifdef CONFIG_BLK_DEV_DTC2278
1758                         case -15: /* "dtc2278" */
1759                                 probe_dtc2278 = 1;
1760                                 goto done;
1761 #endif
1762 #ifdef CONFIG_BLK_DEV_CMD640
1763                         case -14: /* "cmd640_vlb" */
1764                         {
1765                                 extern int cmd640_vlb; /* flag for cmd640.c */
1766                                 cmd640_vlb = 1;
1767                                 goto done;
1768                         }
1769 #endif
1770 #ifdef CONFIG_BLK_DEV_HT6560B
1771                         case -13: /* "ht6560b" */
1772                                 probe_ht6560b = 1;
1773                                 goto done;
1774 #endif
1775 #ifdef CONFIG_BLK_DEV_QD65XX
1776                         case -12: /* "qd65xx" */
1777                                 probe_qd65xx = 1;
1778                                 goto done;
1779 #endif
1780 #ifdef CONFIG_BLK_DEV_4DRIVES
1781                         case -11: /* "four" drives on one set of ports */
1782                         {
1783                                 ide_hwif_t *mate = &ide_hwifs[hw^1];
1784                                 mate->drives[0].select.all ^= 0x20;
1785                                 mate->drives[1].select.all ^= 0x20;
1786                                 hwif->chipset = mate->chipset = ide_4drives;
1787                                 mate->irq = hwif->irq;
1788                                 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1789                                 hwif->mate = mate;
1790                                 mate->mate = hwif;
1791                                 hwif->serialized = mate->serialized = 1;
1792                                 goto obsolete_option;
1793                         }
1794 #endif /* CONFIG_BLK_DEV_4DRIVES */
1795                         case -10: /* minus10 */
1796                         case -9: /* minus9 */
1797                         case -8: /* minus8 */
1798                         case -4:
1799                         case -3:
1800                                 goto bad_option;
1801                         case -7: /* ata66 */
1802 #ifdef CONFIG_BLK_DEV_IDEPCI
1803                                 hwif->udma_four = 1;
1804                                 goto obsolete_option;
1805 #else
1806                                 goto bad_hwif;
1807 #endif
1808                         case -6: /* dma */
1809                                 hwif->autodma = 1;
1810                                 goto obsolete_option;
1811                         case -5: /* "reset" */
1812                                 hwif->reset = 1;
1813                                 goto obsolete_option;
1814                         case -2: /* "serialize" */
1815                                 hwif->mate = &ide_hwifs[hw^1];
1816                                 hwif->mate->mate = hwif;
1817                                 hwif->serialized = hwif->mate->serialized = 1;
1818                                 goto obsolete_option;
1819
1820                         case -1: /* "noprobe" */
1821                                 hwif->noprobe = 1;
1822                                 goto done;
1823
1824                         case 1: /* base */
1825                                 vals[1] = vals[0] + 0x206; /* default ctl */
1826                         case 2: /* base,ctl */
1827                                 vals[2] = 0;    /* default irq = probe for it */
1828                         case 3: /* base,ctl,irq */
1829                                 hwif->hw.irq = vals[2];
1830                                 ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq);
1831                                 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
1832                                 hwif->irq      = vals[2];
1833                                 hwif->noprobe  = 0;
1834                                 hwif->chipset  = ide_forced;
1835                                 goto obsolete_option;
1836
1837                         case 0: goto bad_option;
1838                         default:
1839                                 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1840                                 return 1;
1841                 }
1842         }
1843 bad_option:
1844         printk(" -- BAD OPTION\n");
1845         return 1;
1846 obsolete_option:
1847         printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1848         return 1;
1849 bad_hwif:
1850         printk("-- NOT SUPPORTED ON ide%d", hw);
1851 done:
1852         printk("\n");
1853         return 1;
1854 }
1855
1856 extern void __init pnpide_init(void);
1857 extern void __exit pnpide_exit(void);
1858 extern void __init h8300_ide_init(void);
1859
1860 /*
1861  * probe_for_hwifs() finds/initializes "known" IDE interfaces
1862  */
1863 static void __init probe_for_hwifs (void)
1864 {
1865 #ifdef CONFIG_BLK_DEV_IDEPCI
1866         ide_scan_pcibus(ide_scan_direction);
1867 #endif /* CONFIG_BLK_DEV_IDEPCI */
1868
1869 #ifdef CONFIG_ETRAX_IDE
1870         {
1871                 extern void init_e100_ide(void);
1872                 init_e100_ide();
1873         }
1874 #endif /* CONFIG_ETRAX_IDE */
1875 #ifdef CONFIG_BLK_DEV_CMD640
1876         {
1877                 extern void ide_probe_for_cmd640x(void);
1878                 ide_probe_for_cmd640x();
1879         }
1880 #endif /* CONFIG_BLK_DEV_CMD640 */
1881 #ifdef CONFIG_BLK_DEV_IDE_PMAC
1882         {
1883                 extern int pmac_ide_probe(void);
1884                 (void)pmac_ide_probe();
1885         }
1886 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
1887 #ifdef CONFIG_BLK_DEV_GAYLE
1888         {
1889                 extern void gayle_init(void);
1890                 gayle_init();
1891         }
1892 #endif /* CONFIG_BLK_DEV_GAYLE */
1893 #ifdef CONFIG_BLK_DEV_FALCON_IDE
1894         {
1895                 extern void falconide_init(void);
1896                 falconide_init();
1897         }
1898 #endif /* CONFIG_BLK_DEV_FALCON_IDE */
1899 #ifdef CONFIG_BLK_DEV_MAC_IDE
1900         {
1901                 extern void macide_init(void);
1902                 macide_init();
1903         }
1904 #endif /* CONFIG_BLK_DEV_MAC_IDE */
1905 #ifdef CONFIG_BLK_DEV_Q40IDE
1906         {
1907                 extern void q40ide_init(void);
1908                 q40ide_init();
1909         }
1910 #endif /* CONFIG_BLK_DEV_Q40IDE */
1911 #ifdef CONFIG_BLK_DEV_BUDDHA
1912         {
1913                 extern void buddha_init(void);
1914                 buddha_init();
1915         }
1916 #endif /* CONFIG_BLK_DEV_BUDDHA */
1917 #ifdef CONFIG_BLK_DEV_IDEPNP
1918         pnpide_init();
1919 #endif
1920 #ifdef CONFIG_H8300
1921         h8300_ide_init();
1922 #endif
1923 }
1924
1925 void ide_register_subdriver(ide_drive_t *drive, ide_driver_t *driver)
1926 {
1927 #ifdef CONFIG_IDE_PROC_FS
1928         ide_add_proc_entries(drive->proc, driver->proc, drive);
1929 #endif
1930 }
1931
1932 EXPORT_SYMBOL(ide_register_subdriver);
1933
1934 /**
1935  *      ide_unregister_subdriver        -       disconnect drive from driver
1936  *      @drive: drive to unplug
1937  *      @driver: driver
1938  *
1939  *      Disconnect a drive from the driver it was attached to and then
1940  *      clean up the various proc files and other objects attached to it.
1941  *
1942  *      Takes ide_setting_sem and ide_lock.
1943  *      Caller must hold none of the locks.
1944  */
1945
1946 void ide_unregister_subdriver(ide_drive_t *drive, ide_driver_t *driver)
1947 {
1948         unsigned long flags;
1949
1950 #ifdef CONFIG_IDE_PROC_FS
1951         ide_remove_proc_entries(drive->proc, driver->proc);
1952 #endif
1953         down(&ide_setting_sem);
1954         spin_lock_irqsave(&ide_lock, flags);
1955         /*
1956          * ide_setting_sem protects the settings list
1957          * ide_lock protects the use of settings
1958          *
1959          * so we need to hold both, ide_settings_sem because we want to
1960          * modify the settings list, and ide_lock because we cannot take
1961          * a setting out that is being used.
1962          *
1963          * OTOH both ide_{read,write}_setting are only ever used under
1964          * ide_setting_sem.
1965          */
1966         auto_remove_settings(drive);
1967         spin_unlock_irqrestore(&ide_lock, flags);
1968         up(&ide_setting_sem);
1969 }
1970
1971 EXPORT_SYMBOL(ide_unregister_subdriver);
1972
1973 /*
1974  * Probe module
1975  */
1976
1977 EXPORT_SYMBOL(ide_lock);
1978
1979 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1980 {
1981         return 1;
1982 }
1983
1984 static char *media_string(ide_drive_t *drive)
1985 {
1986         switch (drive->media) {
1987         case ide_disk:
1988                 return "disk";
1989         case ide_cdrom:
1990                 return "cdrom";
1991         case ide_tape:
1992                 return "tape";
1993         case ide_floppy:
1994                 return "floppy";
1995         case ide_optical:
1996                 return "optical";
1997         default:
1998                 return "UNKNOWN";
1999         }
2000 }
2001
2002 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
2003 {
2004         ide_drive_t *drive = to_ide_device(dev);
2005         return sprintf(buf, "%s\n", media_string(drive));
2006 }
2007
2008 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
2009 {
2010         ide_drive_t *drive = to_ide_device(dev);
2011         return sprintf(buf, "%s\n", drive->name);
2012 }
2013
2014 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
2015 {
2016         ide_drive_t *drive = to_ide_device(dev);
2017         return sprintf(buf, "ide:m-%s\n", media_string(drive));
2018 }
2019
2020 static struct device_attribute ide_dev_attrs[] = {
2021         __ATTR_RO(media),
2022         __ATTR_RO(drivename),
2023         __ATTR_RO(modalias),
2024         __ATTR_NULL
2025 };
2026
2027 static int ide_uevent(struct device *dev, char **envp, int num_envp,
2028                       char *buffer, int buffer_size)
2029 {
2030         ide_drive_t *drive = to_ide_device(dev);
2031         int i = 0;
2032         int length = 0;
2033
2034         add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
2035                        "MEDIA=%s", media_string(drive));
2036         add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
2037                        "DRIVENAME=%s", drive->name);
2038         add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
2039                        "MODALIAS=ide:m-%s", media_string(drive));
2040         envp[i] = NULL;
2041         return 0;
2042 }
2043
2044 static int generic_ide_probe(struct device *dev)
2045 {
2046         ide_drive_t *drive = to_ide_device(dev);
2047         ide_driver_t *drv = to_ide_driver(dev->driver);
2048
2049         return drv->probe ? drv->probe(drive) : -ENODEV;
2050 }
2051
2052 static int generic_ide_remove(struct device *dev)
2053 {
2054         ide_drive_t *drive = to_ide_device(dev);
2055         ide_driver_t *drv = to_ide_driver(dev->driver);
2056
2057         if (drv->remove)
2058                 drv->remove(drive);
2059
2060         return 0;
2061 }
2062
2063 static void generic_ide_shutdown(struct device *dev)
2064 {
2065         ide_drive_t *drive = to_ide_device(dev);
2066         ide_driver_t *drv = to_ide_driver(dev->driver);
2067
2068         if (dev->driver && drv->shutdown)
2069                 drv->shutdown(drive);
2070 }
2071
2072 struct bus_type ide_bus_type = {
2073         .name           = "ide",
2074         .match          = ide_bus_match,
2075         .uevent         = ide_uevent,
2076         .probe          = generic_ide_probe,
2077         .remove         = generic_ide_remove,
2078         .shutdown       = generic_ide_shutdown,
2079         .dev_attrs      = ide_dev_attrs,
2080         .suspend        = generic_ide_suspend,
2081         .resume         = generic_ide_resume,
2082 };
2083
2084 EXPORT_SYMBOL_GPL(ide_bus_type);
2085
2086 /*
2087  * This is gets invoked once during initialization, to set *everything* up
2088  */
2089 static int __init ide_init(void)
2090 {
2091         int ret;
2092
2093         printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
2094         system_bus_speed = ide_system_bus_speed();
2095
2096         ret = bus_register(&ide_bus_type);
2097         if (ret < 0) {
2098                 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
2099                 return ret;
2100         }
2101
2102         init_ide_data();
2103
2104 #ifdef CONFIG_IDE_PROC_FS
2105         proc_ide_root = proc_mkdir("ide", NULL);
2106 #endif
2107
2108 #ifdef CONFIG_BLK_DEV_ALI14XX
2109         if (probe_ali14xx)
2110                 (void)ali14xx_init();
2111 #endif
2112 #ifdef CONFIG_BLK_DEV_UMC8672
2113         if (probe_umc8672)
2114                 (void)umc8672_init();
2115 #endif
2116 #ifdef CONFIG_BLK_DEV_DTC2278
2117         if (probe_dtc2278)
2118                 (void)dtc2278_init();
2119 #endif
2120 #ifdef CONFIG_BLK_DEV_HT6560B
2121         if (probe_ht6560b)
2122                 (void)ht6560b_init();
2123 #endif
2124 #ifdef CONFIG_BLK_DEV_QD65XX
2125         if (probe_qd65xx)
2126                 (void)qd65xx_init();
2127 #endif
2128
2129         initializing = 1;
2130         /* Probe for special PCI and other "known" interface chipsets. */
2131         probe_for_hwifs();
2132         initializing = 0;
2133
2134         proc_ide_create();
2135
2136         return 0;
2137 }
2138
2139 #ifdef MODULE
2140 static char *options = NULL;
2141 module_param(options, charp, 0);
2142 MODULE_LICENSE("GPL");
2143
2144 static void __init parse_options (char *line)
2145 {
2146         char *next = line;
2147
2148         if (line == NULL || !*line)
2149                 return;
2150         while ((line = next) != NULL) {
2151                 if ((next = strchr(line,' ')) != NULL)
2152                         *next++ = 0;
2153                 if (!ide_setup(line))
2154                         printk (KERN_INFO "Unknown option '%s'\n", line);
2155         }
2156 }
2157
2158 int __init init_module (void)
2159 {
2160         parse_options(options);
2161         return ide_init();
2162 }
2163
2164 void __exit cleanup_module (void)
2165 {
2166         int index;
2167
2168         for (index = 0; index < MAX_HWIFS; ++index)
2169                 ide_unregister(index);
2170
2171 #ifdef CONFIG_BLK_DEV_IDEPNP
2172         pnpide_exit();
2173 #endif
2174
2175         proc_ide_destroy();
2176
2177         bus_unregister(&ide_bus_type);
2178 }
2179
2180 #else /* !MODULE */
2181
2182 __setup("", ide_setup);
2183
2184 module_init(ide_init);
2185
2186 #endif /* MODULE */