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 #undef REALLY_SLOW_IO           /* most systems can safely undef this */
 130
 131 #define _IDE_C                  /* Tell ide.h it's really us */
 132
 133 #include <linux/config.h>
 134 #include <linux/module.h>
 135 #include <linux/types.h>
 136 #include <linux/string.h>
 137 #include <linux/kernel.h>
 138 #include <linux/timer.h>
 139 #include <linux/mm.h>
 140 #include <linux/interrupt.h>
 141 #include <linux/major.h>
 142 #include <linux/errno.h>
 143 #include <linux/genhd.h>
 144 #include <linux/blkpg.h>
 145 #include <linux/slab.h>
 146 #include <linux/init.h>
 147 #include <linux/pci.h>
 148 #include <linux/delay.h>
 149 #include <linux/ide.h>
 150 #include <linux/devfs_fs_kernel.h>
 151 #include <linux/completion.h>
 152 #include <linux/reboot.h>
 153 #include <linux/cdrom.h>
 154 #include <linux/seq_file.h>
 155 #include <linux/device.h>
 156 #include <linux/bitops.h>
 157
 158 #include <asm/byteorder.h>
 159 #include <asm/irq.h>
 160 #include <asm/uaccess.h>
 161 #include <asm/io.h>
 162
 163
 164 /* default maximum number of failures */
 165 #define IDE_DEFAULT_MAX_FAILURES        1
 166
 167 static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
 168                                         IDE2_MAJOR, IDE3_MAJOR,
 169                                         IDE4_MAJOR, IDE5_MAJOR,
 170                                         IDE6_MAJOR, IDE7_MAJOR,
 171                                         IDE8_MAJOR, IDE9_MAJOR };
 172
 173 static int idebus_parameter;    /* holds the "idebus=" parameter */
 174 static int system_bus_speed;    /* holds what we think is VESA/PCI bus speed */
 175 static int initializing;        /* set while initializing built-in drivers */
 176
 177 DECLARE_MUTEX(ide_cfg_sem);
 178  __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
 179
 180 #ifdef CONFIG_BLK_DEV_IDEPCI
 181 static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
 182 #endif
 183
 184 #ifdef CONFIG_IDEDMA_AUTO
 185 int noautodma = 0;
 186 #else
 187 int noautodma = 1;
 188 #endif
 189
 190 EXPORT_SYMBOL(noautodma);
 191
 192 #ifdef CONFIG_BLK_DEV_IDEACPI
 193 int ide_noacpi = 0;
 194 int ide_noacpitfs = 1;
 195 int ide_noacpionboot = 1;
 196 #endif
 197
 198 /*
 199  * This is declared extern in ide.h, for access by other IDE modules:
 200  */
 201 ide_hwif_t ide_hwifs[MAX_HWIFS];        /* master data repository */
 202
 203 EXPORT_SYMBOL(ide_hwifs);
 204
 205 /*
 206  * The ide_probe_function takes too much time ...
 207  */
 208 int ide_wait_ms = 12;
 209 EXPORT_SYMBOL(ide_wait_ms);
 210
 211 /*
 212  * Do not even *think* about calling this!
 213  */
 214 static void init_hwif_data(ide_hwif_t *hwif, unsigned int index)
 215 {
 216         unsigned int unit;
 217
 218         /* bulk initialize hwif & drive info with zeros */
 219         memset(hwif, 0, sizeof(ide_hwif_t));
 220
 221         /* fill in any non-zero initial values */
 222         hwif->index     = index;
 223         hwif->major     = ide_hwif_to_major[index];
 224
 225         hwif->name[0]   = 'i';
 226         hwif->name[1]   = 'd';
 227         hwif->name[2]   = 'e';
 228         hwif->name[3]   = '0' + index;
 229
 230         hwif->bus_state = BUSSTATE_ON;
 231
 232         hwif->atapi_dma = 0;            /* disable all atapi dma */
 233         hwif->ultra_mask = 0x80;        /* disable all ultra */
 234         hwif->mwdma_mask = 0x80;        /* disable all mwdma */
 235         hwif->swdma_mask = 0x80;        /* disable all swdma */
 236
 237         init_completion(&hwif->gendev_rel_comp);
 238
 239         default_hwif_iops(hwif);
 240         default_hwif_transport(hwif);
 241         for (unit = 0; unit < MAX_DRIVES; ++unit) {
 242                 ide_drive_t *drive = &hwif->drives[unit];
 243
 244                 drive->media                    = ide_disk;
 245                 drive->select.all               = (unit<<4)|0xa0;
 246                 drive->hwif                     = hwif;
 247                 drive->ctl                      = 0x08;
 248                 drive->ready_stat               = READY_STAT;
 249                 drive->bad_wstat                = BAD_W_STAT;
 250                 drive->special.b.recalibrate    = 1;
 251                 drive->special.b.set_geometry   = 1;
 252                 drive->name[0]                  = 'h';
 253                 drive->name[1]                  = 'd';
 254                 drive->name[2]                  = 'a' + (index * MAX_DRIVES) + unit;
 255                 drive->max_failures             = IDE_DEFAULT_MAX_FAILURES;
 256                 drive->using_dma                = 0;
 257                 drive->vdma                     = 0;
 258                 INIT_LIST_HEAD(&drive->list);
 259                 init_completion(&drive->gendev_rel_comp);
 260         }
 261 }
 262
 263 static void init_hwif_default(ide_hwif_t *hwif, unsigned int index)
 264 {
 265         hw_regs_t hw;
 266
 267         memset(&hw, 0, sizeof(hw_regs_t));
 268
 269         ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq);
 270
 271         memcpy(&hwif->hw, &hw, sizeof(hw));
 272         memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
 273
 274         hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
 275 #ifdef CONFIG_BLK_DEV_HD
 276         if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA)
 277                 hwif->noprobe = 1;      /* may be overridden by ide_setup() */
 278 #endif
 279 }
 280
 281 extern void ide_arm_init(void);
 282
 283 /*
 284  * init_ide_data() sets reasonable default values into all fields
 285  * of all instances of the hwifs and drives, but only on the first call.
 286  * Subsequent calls have no effect (they don't wipe out anything).
 287  *
 288  * This routine is normally called at driver initialization time,
 289  * but may also be called MUCH earlier during kernel "command-line"
 290  * parameter processing.  As such, we cannot depend on any other parts
 291  * of the kernel (such as memory allocation) to be functioning yet.
 292  *
 293  * This is too bad, as otherwise we could dynamically allocate the
 294  * ide_drive_t structs as needed, rather than always consuming memory
 295  * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
 296  *
 297  * FIXME: We should stuff the setup data into __init and copy the
 298  * relevant hwifs/allocate them properly during boot.
 299  */
 300 #define MAGIC_COOKIE 0x12345678
 301 static void __init init_ide_data (void)
 302 {
 303         ide_hwif_t *hwif;
 304         unsigned int index;
 305         static unsigned long magic_cookie = MAGIC_COOKIE;
 306
 307         if (magic_cookie != MAGIC_COOKIE)
 308                 return;         /* already initialized */
 309         magic_cookie = 0;
 310
 311         /* Initialise all interface structures */
 312         for (index = 0; index < MAX_HWIFS; ++index) {
 313                 hwif = &ide_hwifs[index];
 314                 init_hwif_data(hwif, index);
 315                 init_hwif_default(hwif, index);
 316 #if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
 317                 hwif->irq = hwif->hw.irq =
 318                         ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
 319 #endif
 320         }
 321 #ifdef CONFIG_IDE_ARM
 322         initializing = 1;
 323         ide_arm_init();
 324         initializing = 0;
 325 #endif
 326 }
 327
 328 /**
 329  *      ide_system_bus_speed    -       guess bus speed
 330  *
 331  *      ide_system_bus_speed() returns what we think is the system VESA/PCI
 332  *      bus speed (in MHz). This is used for calculating interface PIO timings.
 333  *      The default is 40 for known PCI systems, 50 otherwise.
 334  *      The "idebus=xx" parameter can be used to override this value.
 335  *      The actual value to be used is computed/displayed the first time
 336  *      through. Drivers should only use this as a last resort.
 337  *
 338  *      Returns a guessed speed in MHz.
 339  */
 340
 341 static int ide_system_bus_speed(void)
 342 {
 343 #ifdef CONFIG_PCI
 344         static struct pci_device_id pci_default[] = {
 345                 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
 346                 { }
 347         };
 348 #else
 349 #define pci_default 0
 350 #endif /* CONFIG_PCI */
 351
 352         if (!system_bus_speed) {
 353                 if (idebus_parameter) {
 354                         /* user supplied value */
 355                         system_bus_speed = idebus_parameter;
 356                 } else if (pci_dev_present(pci_default)) {
 357                         /* safe default value for PCI */
 358                         system_bus_speed = 33;
 359                 } else {
 360                         /* safe default value for VESA and PCI */
 361                         system_bus_speed = 50;
 362                 }
 363                 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
 364                         "for PIO modes%s\n", system_bus_speed,
 365                         idebus_parameter ? "" : "; override with idebus=xx");
 366         }
 367         return system_bus_speed;
 368 }
 369
 370 #ifdef CONFIG_PROC_FS
 371 struct proc_dir_entry *proc_ide_root;
 372 #endif
 373
 374 static struct resource* hwif_request_region(ide_hwif_t *hwif,
 375                                             unsigned long addr, int num)
 376 {
 377         struct resource *res = request_region(addr, num, hwif->name);
 378
 379         if (!res)
 380                 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
 381                                 hwif->name, addr, addr+num-1);
 382         return res;
 383 }
 384
 385 /**
 386  *      ide_hwif_request_regions - request resources for IDE
 387  *      @hwif: interface to use
 388  *
 389  *      Requests all the needed resources for an interface.
 390  *      Right now core IDE code does this work which is deeply wrong.
 391  *      MMIO leaves it to the controller driver,
 392  *      PIO will migrate this way over time.
 393  */
 394
 395 int ide_hwif_request_regions(ide_hwif_t *hwif)
 396 {
 397         unsigned long addr;
 398         unsigned int i;
 399
 400         if (hwif->mmio == 2)
 401                 return 0;
 402         BUG_ON(hwif->mmio == 1);
 403         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
 404         if (addr && !hwif_request_region(hwif, addr, 1))
 405                 goto control_region_busy;
 406         hwif->straight8 = 0;
 407         addr = hwif->io_ports[IDE_DATA_OFFSET];
 408         if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
 409                 if (!hwif_request_region(hwif, addr, 8))
 410                         goto data_region_busy;
 411                 hwif->straight8 = 1;
 412                 return 0;
 413         }
 414         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
 415                 addr = hwif->io_ports[i];
 416                 if (!hwif_request_region(hwif, addr, 1)) {
 417                         while (--i)
 418                                 release_region(addr, 1);
 419                         goto data_region_busy;
 420                 }
 421         }
 422         return 0;
 423
 424 data_region_busy:
 425         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
 426         if (addr)
 427                 release_region(addr, 1);
 428 control_region_busy:
 429         /* If any errors are return, we drop the hwif interface. */
 430         return -EBUSY;
 431 }
 432
 433 /**
 434  *      ide_hwif_release_regions - free IDE resources
 435  *
 436  *      Note that we only release the standard ports,
 437  *      and do not even try to handle any extra ports
 438  *      allocated for weird IDE interface chipsets.
 439  *
 440  *      Note also that we don't yet handle mmio resources here. More
 441  *      importantly our caller should be doing this so we need to
 442  *      restructure this as a helper function for drivers.
 443  */
 444
 445 void ide_hwif_release_regions(ide_hwif_t *hwif)
 446 {
 447         u32 i = 0;
 448
 449         if (hwif->mmio == 2)
 450                 return;
 451         if (hwif->io_ports[IDE_CONTROL_OFFSET])
 452                 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
 453         if (hwif->straight8) {
 454                 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
 455                 return;
 456         }
 457         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
 458                 if (hwif->io_ports[i])
 459                         release_region(hwif->io_ports[i], 1);
 460 }
 461
 462 /**
 463  *      ide_hwif_restore        -       restore hwif to template
 464  *      @hwif: hwif to update
 465  *      @tmp_hwif: template
 466  *
 467  *      Restore hwif to a previous state by copying most settngs
 468  *      from the template.
 469  */
 470
 471 static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
 472 {
 473         hwif->hwgroup                   = tmp_hwif->hwgroup;
 474
 475         hwif->gendev.parent             = tmp_hwif->gendev.parent;
 476
 477         hwif->proc                      = tmp_hwif->proc;
 478
 479         hwif->major                     = tmp_hwif->major;
 480         hwif->straight8                 = tmp_hwif->straight8;
 481         hwif->bus_state                 = tmp_hwif->bus_state;
 482
 483         hwif->atapi_dma                 = tmp_hwif->atapi_dma;
 484         hwif->ultra_mask                = tmp_hwif->ultra_mask;
 485         hwif->mwdma_mask                = tmp_hwif->mwdma_mask;
 486         hwif->swdma_mask                = tmp_hwif->swdma_mask;
 487
 488         hwif->chipset                   = tmp_hwif->chipset;
 489         hwif->hold                      = tmp_hwif->hold;
 490
 491 #ifdef CONFIG_BLK_DEV_IDEPCI
 492         hwif->pci_dev                   = tmp_hwif->pci_dev;
 493         hwif->cds                       = tmp_hwif->cds;
 494 #endif
 495
 496         hwif->tuneproc                  = tmp_hwif->tuneproc;
 497         hwif->speedproc                 = tmp_hwif->speedproc;
 498         hwif->selectproc                = tmp_hwif->selectproc;
 499         hwif->reset_poll                = tmp_hwif->reset_poll;
 500         hwif->pre_reset                 = tmp_hwif->pre_reset;
 501         hwif->resetproc                 = tmp_hwif->resetproc;
 502         hwif->intrproc                  = tmp_hwif->intrproc;
 503         hwif->maskproc                  = tmp_hwif->maskproc;
 504         hwif->quirkproc                 = tmp_hwif->quirkproc;
 505         hwif->busproc                   = tmp_hwif->busproc;
 506
 507         hwif->ata_input_data            = tmp_hwif->ata_input_data;
 508         hwif->ata_output_data           = tmp_hwif->ata_output_data;
 509         hwif->atapi_input_bytes         = tmp_hwif->atapi_input_bytes;
 510         hwif->atapi_output_bytes        = tmp_hwif->atapi_output_bytes;
 511
 512         hwif->dma_setup                 = tmp_hwif->dma_setup;
 513         hwif->dma_exec_cmd              = tmp_hwif->dma_exec_cmd;
 514         hwif->dma_start                 = tmp_hwif->dma_start;
 515         hwif->ide_dma_end               = tmp_hwif->ide_dma_end;
 516         hwif->ide_dma_check             = tmp_hwif->ide_dma_check;
 517         hwif->ide_dma_on                = tmp_hwif->ide_dma_on;
 518         hwif->ide_dma_off_quietly       = tmp_hwif->ide_dma_off_quietly;
 519         hwif->ide_dma_test_irq          = tmp_hwif->ide_dma_test_irq;
 520         hwif->ide_dma_host_on           = tmp_hwif->ide_dma_host_on;
 521         hwif->ide_dma_host_off          = tmp_hwif->ide_dma_host_off;
 522         hwif->ide_dma_lostirq           = tmp_hwif->ide_dma_lostirq;
 523         hwif->ide_dma_timeout           = tmp_hwif->ide_dma_timeout;
 524
 525         hwif->OUTB                      = tmp_hwif->OUTB;
 526         hwif->OUTBSYNC                  = tmp_hwif->OUTBSYNC;
 527         hwif->OUTW                      = tmp_hwif->OUTW;
 528         hwif->OUTL                      = tmp_hwif->OUTL;
 529         hwif->OUTSW                     = tmp_hwif->OUTSW;
 530         hwif->OUTSL                     = tmp_hwif->OUTSL;
 531
 532         hwif->INB                       = tmp_hwif->INB;
 533         hwif->INW                       = tmp_hwif->INW;
 534         hwif->INL                       = tmp_hwif->INL;
 535         hwif->INSW                      = tmp_hwif->INSW;
 536         hwif->INSL                      = tmp_hwif->INSL;
 537
 538         hwif->sg_max_nents              = tmp_hwif->sg_max_nents;
 539
 540         hwif->mmio                      = tmp_hwif->mmio;
 541         hwif->rqsize                    = tmp_hwif->rqsize;
 542         hwif->no_lba48                  = tmp_hwif->no_lba48;
 543
 544 #ifndef CONFIG_BLK_DEV_IDECS
 545         hwif->irq                       = tmp_hwif->irq;
 546 #endif
 547
 548         hwif->dma_base                  = tmp_hwif->dma_base;
 549         hwif->dma_master                = tmp_hwif->dma_master;
 550         hwif->dma_command               = tmp_hwif->dma_command;
 551         hwif->dma_vendor1               = tmp_hwif->dma_vendor1;
 552         hwif->dma_status                = tmp_hwif->dma_status;
 553         hwif->dma_vendor3               = tmp_hwif->dma_vendor3;
 554         hwif->dma_prdtable              = tmp_hwif->dma_prdtable;
 555
 556         hwif->dma_extra                 = tmp_hwif->dma_extra;
 557         hwif->config_data               = tmp_hwif->config_data;
 558         hwif->select_data               = tmp_hwif->select_data;
 559         hwif->autodma                   = tmp_hwif->autodma;
 560         hwif->udma_four                 = tmp_hwif->udma_four;
 561         hwif->no_dsc                    = tmp_hwif->no_dsc;
 562
 563         hwif->hwif_data                 = tmp_hwif->hwif_data;
 564 }
 565
 566 /**
 567  *      ide_unregister          -       free an ide interface
 568  *      @index: index of interface (will change soon to a pointer)
 569  *
 570  *      Perform the final unregister of an IDE interface. At the moment
 571  *      we don't refcount interfaces so this will also get split up.
 572  *
 573  *      Locking:
 574  *      The caller must not hold the IDE locks
 575  *      The drive present/vanishing is not yet properly locked
 576  *      Take care with the callbacks. These have been split to avoid
 577  *      deadlocking the IDE layer. The shutdown callback is called
 578  *      before we take the lock and free resources. It is up to the
 579  *      caller to be sure there is no pending I/O here, and that
 580  *      the interfce will not be reopened (present/vanishing locking
 581  *      isnt yet done btw). After we commit to the final kill we
 582  *      call the cleanup callback with the ide locks held.
 583  *
 584  *      Unregister restores the hwif structures to the default state.
 585  *      This is raving bonkers.
 586  */
 587
 588 void ide_unregister(unsigned int index)
 589 {
 590         ide_drive_t *drive;
 591         ide_hwif_t *hwif, *g;
 592         static ide_hwif_t tmp_hwif; /* protected by ide_cfg_sem */
 593         ide_hwgroup_t *hwgroup;
 594         int irq_count = 0, unit;
 595
 596         BUG_ON(index >= MAX_HWIFS);
 597
 598         BUG_ON(in_interrupt());
 599         BUG_ON(irqs_disabled());
 600         down(&ide_cfg_sem);
 601         spin_lock_irq(&ide_lock);
 602         hwif = &ide_hwifs[index];
 603         if (!hwif->present)
 604                 goto abort;
 605         for (unit = 0; unit < MAX_DRIVES; ++unit) {
 606                 drive = &hwif->drives[unit];
 607                 if (!drive->present) {
 608                         if (drive->devfs_name[0] != '\0') {
 609                                 devfs_remove(drive->devfs_name);
 610                                 drive->devfs_name[0] = '\0';
 611                         }
 612                         continue;
 613                 }
 614                 spin_unlock_irq(&ide_lock);
 615                 device_unregister(&drive->gendev);
 616                 wait_for_completion(&drive->gendev_rel_comp);
 617                 spin_lock_irq(&ide_lock);
 618         }
 619         hwif->present = 0;
 620
 621         spin_unlock_irq(&ide_lock);
 622
 623         destroy_proc_ide_interface(hwif);
 624
 625         hwgroup = hwif->hwgroup;
 626         /*
 627          * free the irq if we were the only hwif using it
 628          */
 629         g = hwgroup->hwif;
 630         do {
 631                 if (g->irq == hwif->irq)
 632                         ++irq_count;
 633                 g = g->next;
 634         } while (g != hwgroup->hwif);
 635         if (irq_count == 1)
 636                 free_irq(hwif->irq, hwgroup);
 637
 638         spin_lock_irq(&ide_lock);
 639         /*
 640          * Note that we only release the standard ports,
 641          * and do not even try to handle any extra ports
 642          * allocated for weird IDE interface chipsets.
 643          */
 644         ide_hwif_release_regions(hwif);
 645
 646         /*
 647          * Remove us from the hwgroup, and free
 648          * the hwgroup if we were the only member
 649          */
 650         if (hwif->next == hwif) {
 651                 BUG_ON(hwgroup->hwif != hwif);
 652                 kfree(hwgroup);
 653         } else {
 654                 /* There is another interface in hwgroup.
 655                  * Unlink us, and set hwgroup->drive and ->hwif to
 656                  * something sane.
 657                  */
 658                 g = hwgroup->hwif;
 659                 while (g->next != hwif)
 660                         g = g->next;
 661                 g->next = hwif->next;
 662                 if (hwgroup->hwif == hwif) {
 663                         /* Chose a random hwif for hwgroup->hwif.
 664                          * It's guaranteed that there are no drives
 665                          * left in the hwgroup.
 666                          */
 667                         BUG_ON(hwgroup->drive != NULL);
 668                         hwgroup->hwif = g;
 669                 }
 670                 BUG_ON(hwgroup->hwif == hwif);
 671         }
 672
 673         /* More messed up locking ... */
 674         spin_unlock_irq(&ide_lock);
 675         device_unregister(&hwif->gendev);
 676         wait_for_completion(&hwif->gendev_rel_comp);
 677
 678         /*
 679          * Remove us from the kernel's knowledge
 680          */
 681         blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
 682         kfree(hwif->sg_table);
 683         unregister_blkdev(hwif->major, hwif->name);
 684         spin_lock_irq(&ide_lock);
 685
 686         if (hwif->dma_base) {
 687                 (void) ide_release_dma(hwif);
 688
 689                 hwif->dma_base = 0;
 690                 hwif->dma_master = 0;
 691                 hwif->dma_command = 0;
 692                 hwif->dma_vendor1 = 0;
 693                 hwif->dma_status = 0;
 694                 hwif->dma_vendor3 = 0;
 695                 hwif->dma_prdtable = 0;
 696         }
 697
 698         /* copy original settings */
 699         tmp_hwif = *hwif;
 700
 701         /* restore hwif data to pristine status */
 702         init_hwif_data(hwif, index);
 703         init_hwif_default(hwif, index);
 704
 705         ide_hwif_restore(hwif, &tmp_hwif);
 706
 707 abort:
 708         spin_unlock_irq(&ide_lock);
 709         up(&ide_cfg_sem);
 710 }
 711
 712 EXPORT_SYMBOL(ide_unregister);
 713
 714
 715 /**
 716  *      ide_setup_ports         -       set up IDE interface ports
 717  *      @hw: register descriptions
 718  *      @base: base register
 719  *      @offsets: table of register offsets
 720  *      @ctrl: control register
 721  *      @ack_irq: IRQ ack
 722  *      @irq: interrupt lie
 723  *
 724  *      Setup hw_regs_t structure described by parameters.  You
 725  *      may set up the hw structure yourself OR use this routine to
 726  *      do it for you. This is basically a helper
 727  *
 728  */
 729
 730 void ide_setup_ports (  hw_regs_t *hw,
 731                         unsigned long base, int *offsets,
 732                         unsigned long ctrl, unsigned long intr,
 733                         ide_ack_intr_t *ack_intr,
 734 /*
 735  *                      ide_io_ops_t *iops,
 736  */
 737                         int irq)
 738 {
 739         int i;
 740
 741         for (i = 0; i < IDE_NR_PORTS; i++) {
 742                 if (offsets[i] == -1) {
 743                         switch(i) {
 744                                 case IDE_CONTROL_OFFSET:
 745                                         hw->io_ports[i] = ctrl;
 746                                         break;
 747 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
 748                                 case IDE_IRQ_OFFSET:
 749                                         hw->io_ports[i] = intr;
 750                                         break;
 751 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
 752                                 default:
 753                                         hw->io_ports[i] = 0;
 754                                         break;
 755                         }
 756                 } else {
 757                         hw->io_ports[i] = base + offsets[i];
 758                 }
 759         }
 760         hw->irq = irq;
 761         hw->dma = NO_DMA;
 762         hw->ack_intr = ack_intr;
 763 /*
 764  *      hw->iops = iops;
 765  */
 766 }
 767
 768 /**
 769  *      ide_register_hw_with_fixup      -       register IDE interface
 770  *      @hw: hardware registers
 771  *      @hwifp: pointer to returned hwif
 772  *      @fixup: fixup function
 773  *
 774  *      Register an IDE interface, specifying exactly the registers etc.
 775  *      Set init=1 iff calling before probes have taken place.
 776  *
 777  *      Returns -1 on error.
 778  */
 779
 780 int ide_register_hw_with_fixup(hw_regs_t *hw, ide_hwif_t **hwifp, void(*fixup)(ide_hwif_t *hwif))
 781 {
 782         int index, retry = 1;
 783         ide_hwif_t *hwif;
 784
 785         do {
 786                 for (index = 0; index < MAX_HWIFS; ++index) {
 787                         hwif = &ide_hwifs[index];
 788                         if (hwif->hw.io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
 789                                 goto found;
 790                 }
 791                 for (index = 0; index < MAX_HWIFS; ++index) {
 792                         hwif = &ide_hwifs[index];
 793                         if (hwif->hold)
 794                                 continue;
 795                         if ((!hwif->present && !hwif->mate && !initializing) ||
 796                             (!hwif->hw.io_ports[IDE_DATA_OFFSET] && initializing))
 797                                 goto found;
 798                 }
 799                 for (index = 0; index < MAX_HWIFS; index++)
 800                         ide_unregister(index);
 801         } while (retry--);
 802         return -1;
 803 found:
 804         if (hwif->present)
 805                 ide_unregister(index);
 806         else if (!hwif->hold) {
 807                 init_hwif_data(hwif, index);
 808                 init_hwif_default(hwif, index);
 809         }
 810         if (hwif->present)
 811                 return -1;
 812         memcpy(&hwif->hw, hw, sizeof(*hw));
 813         memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports));
 814         hwif->irq = hw->irq;
 815         hwif->noprobe = 0;
 816         hwif->chipset = hw->chipset;
 817         hwif->gendev.parent = hw->dev;
 818
 819         if (!initializing) {
 820                 probe_hwif_init_with_fixup(hwif, fixup);
 821                 create_proc_ide_interfaces();
 822         }
 823
 824         if (hwifp)
 825                 *hwifp = hwif;
 826
 827         return (initializing || hwif->present) ? index : -1;
 828 }
 829
 830 EXPORT_SYMBOL(ide_register_hw_with_fixup);
 831
 832 int ide_register_hw(hw_regs_t *hw, ide_hwif_t **hwifp)
 833 {
 834         return ide_register_hw_with_fixup(hw, hwifp, NULL);
 835 }
 836
 837 EXPORT_SYMBOL(ide_register_hw);
 838
 839 /*
 840  *      Locks for IDE setting functionality
 841  */
 842
 843 DECLARE_MUTEX(ide_setting_sem);
 844
 845 /**
 846  *      __ide_add_setting       -       add an ide setting option
 847  *      @drive: drive to use
 848  *      @name: setting name
 849  *      @rw: true if the function is read write
 850  *      @read_ioctl: function to call on read
 851  *      @write_ioctl: function to call on write
 852  *      @data_type: type of data
 853  *      @min: range minimum
 854  *      @max: range maximum
 855  *      @mul_factor: multiplication scale
 856  *      @div_factor: divison scale
 857  *      @data: private data field
 858  *      @set: setting
 859  *      @auto_remove: setting auto removal flag
 860  *
 861  *      Removes the setting named from the device if it is present.
 862  *      The function takes the settings_lock to protect against
 863  *      parallel changes. This function must not be called from IRQ
 864  *      context. Returns 0 on success or -1 on failure.
 865  *
 866  *      BUGS: This code is seriously over-engineered. There is also
 867  *      magic about how the driver specific features are setup. If
 868  *      a driver is attached we assume the driver settings are auto
 869  *      remove.
 870  */
 871
 872 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)
 873 {
 874         ide_settings_t **p = (ide_settings_t **) &drive->settings, *setting = NULL;
 875
 876         down(&ide_setting_sem);
 877         while ((*p) && strcmp((*p)->name, name) < 0)
 878                 p = &((*p)->next);
 879         if ((setting = kzalloc(sizeof(*setting), GFP_KERNEL)) == NULL)
 880                 goto abort;
 881         if ((setting->name = kmalloc(strlen(name) + 1, GFP_KERNEL)) == NULL)
 882                 goto abort;
 883         strcpy(setting->name, name);
 884         setting->rw = rw;
 885         setting->read_ioctl = read_ioctl;
 886         setting->write_ioctl = write_ioctl;
 887         setting->data_type = data_type;
 888         setting->min = min;
 889         setting->max = max;
 890         setting->mul_factor = mul_factor;
 891         setting->div_factor = div_factor;
 892         setting->data = data;
 893         setting->set = set;
 894
 895         setting->next = *p;
 896         if (auto_remove)
 897                 setting->auto_remove = 1;
 898         *p = setting;
 899         up(&ide_setting_sem);
 900         return 0;
 901 abort:
 902         up(&ide_setting_sem);
 903         kfree(setting);
 904         return -1;
 905 }
 906
 907 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)
 908 {
 909         return __ide_add_setting(drive, name, rw, read_ioctl, write_ioctl, data_type, min, max, mul_factor, div_factor, data, set, 1);
 910 }
 911
 912 EXPORT_SYMBOL(ide_add_setting);
 913
 914 /**
 915  *      __ide_remove_setting    -       remove an ide setting option
 916  *      @drive: drive to use
 917  *      @name: setting name
 918  *
 919  *      Removes the setting named from the device if it is present.
 920  *      The caller must hold the setting semaphore.
 921  */
 922
 923 static void __ide_remove_setting (ide_drive_t *drive, char *name)
 924 {
 925         ide_settings_t **p, *setting;
 926
 927         p = (ide_settings_t **) &drive->settings;
 928
 929         while ((*p) && strcmp((*p)->name, name))
 930                 p = &((*p)->next);
 931         if ((setting = (*p)) == NULL)
 932                 return;
 933
 934         (*p) = setting->next;
 935
 936         kfree(setting->name);
 937         kfree(setting);
 938 }
 939
 940 /**
 941  *      ide_find_setting_by_ioctl       -       find a drive specific ioctl
 942  *      @drive: drive to scan
 943  *      @cmd: ioctl command to handle
 944  *
 945  *      Scan's the device setting table for a matching entry and returns
 946  *      this or NULL if no entry is found. The caller must hold the
 947  *      setting semaphore
 948  */
 949
 950 static ide_settings_t *ide_find_setting_by_ioctl (ide_drive_t *drive, int cmd)
 951 {
 952         ide_settings_t *setting = drive->settings;
 953
 954         while (setting) {
 955                 if (setting->read_ioctl == cmd || setting->write_ioctl == cmd)
 956                         break;
 957                 setting = setting->next;
 958         }
 959
 960         return setting;
 961 }
 962
 963 /**
 964  *      ide_find_setting_by_name        -       find a drive specific setting
 965  *      @drive: drive to scan
 966  *      @name: setting name
 967  *
 968  *      Scan's the device setting table for a matching entry and returns
 969  *      this or NULL if no entry is found. The caller must hold the
 970  *      setting semaphore
 971  */
 972
 973 ide_settings_t *ide_find_setting_by_name (ide_drive_t *drive, char *name)
 974 {
 975         ide_settings_t *setting = drive->settings;
 976
 977         while (setting) {
 978                 if (strcmp(setting->name, name) == 0)
 979                         break;
 980                 setting = setting->next;
 981         }
 982         return setting;
 983 }
 984
 985 /**
 986  *      auto_remove_settings    -       remove driver specific settings
 987  *      @drive: drive
 988  *
 989  *      Automatically remove all the driver specific settings for this
 990  *      drive. This function may sleep and must not be called from IRQ
 991  *      context. The caller must hold ide_setting_sem.
 992  */
 993
 994 static void auto_remove_settings (ide_drive_t *drive)
 995 {
 996         ide_settings_t *setting;
 997 repeat:
 998         setting = drive->settings;
 999         while (setting) {
1000                 if (setting->auto_remove) {
1001                         __ide_remove_setting(drive, setting->name);
1002                         goto repeat;
1003                 }
1004                 setting = setting->next;
1005         }
1006 }
1007
1008 /**
1009  *      ide_read_setting        -       read an IDE setting
1010  *      @drive: drive to read from
1011  *      @setting: drive setting
1012  *
1013  *      Read a drive setting and return the value. The caller
1014  *      must hold the ide_setting_sem when making this call.
1015  *
1016  *      BUGS: the data return and error are the same return value
1017  *      so an error -EINVAL and true return of the same value cannot
1018  *      be told apart
1019  */
1020
1021 int ide_read_setting (ide_drive_t *drive, ide_settings_t *setting)
1022 {
1023         int             val = -EINVAL;
1024         unsigned long   flags;
1025
1026         if ((setting->rw & SETTING_READ)) {
1027                 spin_lock_irqsave(&ide_lock, flags);
1028                 switch(setting->data_type) {
1029                         case TYPE_BYTE:
1030                                 val = *((u8 *) setting->data);
1031                                 break;
1032                         case TYPE_SHORT:
1033                                 val = *((u16 *) setting->data);
1034                                 break;
1035                         case TYPE_INT:
1036                         case TYPE_INTA:
1037                                 val = *((u32 *) setting->data);
1038                                 break;
1039                 }
1040                 spin_unlock_irqrestore(&ide_lock, flags);
1041         }
1042         return val;
1043 }
1044
1045 /**
1046  *      ide_spin_wait_hwgroup   -       wait for group
1047  *      @drive: drive in the group
1048  *
1049  *      Wait for an IDE device group to go non busy and then return
1050  *      holding the ide_lock which guards the hwgroup->busy status
1051  *      and right to use it.
1052  */
1053
1054 int ide_spin_wait_hwgroup (ide_drive_t *drive)
1055 {
1056         ide_hwgroup_t *hwgroup = HWGROUP(drive);
1057         unsigned long timeout = jiffies + (3 * HZ);
1058
1059         spin_lock_irq(&ide_lock);
1060
1061         while (hwgroup->busy) {
1062                 unsigned long lflags;
1063                 spin_unlock_irq(&ide_lock);
1064                 local_irq_set(lflags);
1065                 if (time_after(jiffies, timeout)) {
1066                         local_irq_restore(lflags);
1067                         printk(KERN_ERR "%s: channel busy\n", drive->name);
1068                         return -EBUSY;
1069                 }
1070                 local_irq_restore(lflags);
1071                 spin_lock_irq(&ide_lock);
1072         }
1073         return 0;
1074 }
1075
1076 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
1077
1078 /**
1079  *      ide_write_setting       -       read an IDE setting
1080  *      @drive: drive to read from
1081  *      @setting: drive setting
1082  *      @val: value
1083  *
1084  *      Write a drive setting if it is possible. The caller
1085  *      must hold the ide_setting_sem when making this call.
1086  *
1087  *      BUGS: the data return and error are the same return value
1088  *      so an error -EINVAL and true return of the same value cannot
1089  *      be told apart
1090  *
1091  *      FIXME:  This should be changed to enqueue a special request
1092  *      to the driver to change settings, and then wait on a sema for completion.
1093  *      The current scheme of polling is kludgy, though safe enough.
1094  */
1095
1096 int ide_write_setting (ide_drive_t *drive, ide_settings_t *setting, int val)
1097 {
1098         int i;
1099         u32 *p;
1100
1101         if (!capable(CAP_SYS_ADMIN))
1102                 return -EACCES;
1103         if (!(setting->rw & SETTING_WRITE))
1104                 return -EPERM;
1105         if (val < setting->min || val > setting->max)
1106                 return -EINVAL;
1107         if (setting->set)
1108                 return setting->set(drive, val);
1109         if (ide_spin_wait_hwgroup(drive))
1110                 return -EBUSY;
1111         switch (setting->data_type) {
1112                 case TYPE_BYTE:
1113                         *((u8 *) setting->data) = val;
1114                         break;
1115                 case TYPE_SHORT:
1116                         *((u16 *) setting->data) = val;
1117                         break;
1118                 case TYPE_INT:
1119                         *((u32 *) setting->data) = val;
1120                         break;
1121                 case TYPE_INTA:
1122                         p = (u32 *) setting->data;
1123                         for (i = 0; i < 1 << PARTN_BITS; i++, p++)
1124                                 *p = val;
1125                         break;
1126         }
1127         spin_unlock_irq(&ide_lock);
1128         return 0;
1129 }
1130
1131 static int set_io_32bit(ide_drive_t *drive, int arg)
1132 {
1133         drive->io_32bit = arg;
1134 #ifdef CONFIG_BLK_DEV_DTC2278
1135         if (HWIF(drive)->chipset == ide_dtc2278)
1136                 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
1137 #endif /* CONFIG_BLK_DEV_DTC2278 */
1138         return 0;
1139 }
1140
1141 static int set_using_dma (ide_drive_t *drive, int arg)
1142 {
1143 #ifdef CONFIG_BLK_DEV_IDEDMA
1144         if (!drive->id || !(drive->id->capability & 1))
1145                 return -EPERM;
1146         if (HWIF(drive)->ide_dma_check == NULL)
1147                 return -EPERM;
1148         if (arg) {
1149                 if (HWIF(drive)->ide_dma_check(drive)) return -EIO;
1150                 if (HWIF(drive)->ide_dma_on(drive)) return -EIO;
1151         } else {
1152                 if (__ide_dma_off(drive))
1153                         return -EIO;
1154         }
1155         return 0;
1156 #else
1157         return -EPERM;
1158 #endif
1159 }
1160
1161 static int set_pio_mode (ide_drive_t *drive, int arg)
1162 {
1163         struct request rq;
1164
1165         if (!HWIF(drive)->tuneproc)
1166                 return -ENOSYS;
1167         if (drive->special.b.set_tune)
1168                 return -EBUSY;
1169         ide_init_drive_cmd(&rq);
1170         drive->tune_req = (u8) arg;
1171         drive->special.b.set_tune = 1;
1172         (void) ide_do_drive_cmd(drive, &rq, ide_wait);
1173         return 0;
1174 }
1175
1176 static int set_xfer_rate (ide_drive_t *drive, int arg)
1177 {
1178         int err = ide_wait_cmd(drive,
1179                         WIN_SETFEATURES, (u8) arg,
1180                         SETFEATURES_XFER, 0, NULL);
1181
1182         if (!err && arg) {
1183                 ide_set_xfer_rate(drive, (u8) arg);
1184                 ide_driveid_update(drive);
1185         }
1186         return err;
1187 }
1188
1189 /**
1190  *      ide_add_generic_settings        -       generic ide settings
1191  *      @drive: drive being configured
1192  *
1193  *      Add the generic parts of the system settings to the /proc files and
1194  *      ioctls for this IDE device. The caller must not be holding the
1195  *      ide_setting_sem.
1196  */
1197
1198 void ide_add_generic_settings (ide_drive_t *drive)
1199 {
1200 /*
1201  *                        drive         setting name            read/write access                               read ioctl              write ioctl             data type       min     max                             mul_factor      div_factor      data pointer                    set function
1202  */
1203         __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);
1204         __ide_add_setting(drive,        "keepsettings",         SETTING_RW,                                     HDIO_GET_KEEPSETTINGS,  HDIO_SET_KEEPSETTINGS,  TYPE_BYTE,      0,      1,                              1,              1,              &drive->keep_settings,          NULL,           0);
1205         __ide_add_setting(drive,        "nice1",                SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->nice1,                  NULL,           0);
1206         __ide_add_setting(drive,        "pio_mode",             SETTING_WRITE,                                  -1,                     HDIO_SET_PIO_MODE,      TYPE_BYTE,      0,      255,                            1,              1,              NULL,                           set_pio_mode,   0);
1207         __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);
1208         __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);
1209         __ide_add_setting(drive,        "init_speed",           SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->init_speed,             NULL,           0);
1210         __ide_add_setting(drive,        "current_speed",        SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->current_speed,          set_xfer_rate,  0);
1211         __ide_add_setting(drive,        "number",               SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      3,                              1,              1,              &drive->dn,                     NULL,           0);
1212 }
1213
1214 /**
1215  *      system_bus_clock        -       clock guess
1216  *
1217  *      External version of the bus clock guess used by very old IDE drivers
1218  *      for things like VLB timings. Should not be used.
1219  */
1220
1221 int system_bus_clock (void)
1222 {
1223         return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
1224 }
1225
1226 EXPORT_SYMBOL(system_bus_clock);
1227
1228 static int generic_ide_suspend(struct device *dev, pm_message_t state)
1229 {
1230         ide_drive_t *drive = dev->driver_data;
1231         ide_hwif_t *hwif = HWIF(drive);
1232         struct request rq;
1233         struct request_pm_state rqpm;
1234         ide_task_t args;
1235
1236         /* Call ACPI _GTM only once */
1237         if (!(drive->dn % 2))
1238                 ide_acpi_get_timing(hwif);
1239
1240         memset(&rq, 0, sizeof(rq));
1241         memset(&rqpm, 0, sizeof(rqpm));
1242         memset(&args, 0, sizeof(args));
1243         rq.flags = REQ_PM_SUSPEND;
1244         rq.special = &args;
1245         rq.pm = &rqpm;
1246         rqpm.pm_step = ide_pm_state_start_suspend;
1247         rqpm.pm_state = state.event;
1248
1249         return ide_do_drive_cmd(drive, &rq, ide_wait);
1250 }
1251
1252 static int generic_ide_resume(struct device *dev)
1253 {
1254         ide_drive_t *drive = dev->driver_data;
1255         ide_hwif_t *hwif = HWIF(drive);
1256         struct request rq;
1257         struct request_pm_state rqpm;
1258         ide_task_t args;
1259
1260         /* Call ACPI _STM only once */
1261         if (!(drive->dn % 2))
1262                 ide_acpi_push_timing(hwif);
1263
1264         ide_acpi_exec_tfs(drive);
1265
1266         memset(&rq, 0, sizeof(rq));
1267         memset(&rqpm, 0, sizeof(rqpm));
1268         memset(&args, 0, sizeof(args));
1269         rq.flags = REQ_PM_RESUME;
1270         rq.special = &args;
1271         rq.pm = &rqpm;
1272         rqpm.pm_step = ide_pm_state_start_resume;
1273         rqpm.pm_state = PM_EVENT_ON;
1274
1275         return ide_do_drive_cmd(drive, &rq, ide_head_wait);
1276 }
1277
1278 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
1279                         unsigned int cmd, unsigned long arg)
1280 {
1281         ide_settings_t *setting;
1282         ide_driver_t *drv;
1283         int err = 0;
1284         void __user *p = (void __user *)arg;
1285
1286         down(&ide_setting_sem);
1287         if ((setting = ide_find_setting_by_ioctl(drive, cmd)) != NULL) {
1288                 if (cmd == setting->read_ioctl) {
1289                         err = ide_read_setting(drive, setting);
1290                         up(&ide_setting_sem);
1291                         return err >= 0 ? put_user(err, (long __user *)arg) : err;
1292                 } else {
1293                         if (bdev != bdev->bd_contains)
1294                                 err = -EINVAL;
1295                         else
1296                                 err = ide_write_setting(drive, setting, arg);
1297                         up(&ide_setting_sem);
1298                         return err;
1299                 }
1300         }
1301         up(&ide_setting_sem);
1302
1303         switch (cmd) {
1304                 case HDIO_OBSOLETE_IDENTITY:
1305                 case HDIO_GET_IDENTITY:
1306                         if (bdev != bdev->bd_contains)
1307                                 return -EINVAL;
1308                         if (drive->id_read == 0)
1309                                 return -ENOMSG;
1310                         if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1311                                 return -EFAULT;
1312                         return 0;
1313
1314                 case HDIO_GET_NICE:
1315                         return put_user(drive->dsc_overlap      <<      IDE_NICE_DSC_OVERLAP    |
1316                                         drive->atapi_overlap    <<      IDE_NICE_ATAPI_OVERLAP  |
1317                                         drive->nice0            <<      IDE_NICE_0              |
1318                                         drive->nice1            <<      IDE_NICE_1              |
1319                                         drive->nice2            <<      IDE_NICE_2,
1320                                         (long __user *) arg);
1321
1322 #ifdef CONFIG_IDE_TASK_IOCTL
1323                 case HDIO_DRIVE_TASKFILE:
1324                         if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1325                                 return -EACCES;
1326                         switch(drive->media) {
1327                                 case ide_disk:
1328                                         return ide_taskfile_ioctl(drive, cmd, arg);
1329                                 default:
1330                                         return -ENOMSG;
1331                         }
1332 #endif /* CONFIG_IDE_TASK_IOCTL */
1333
1334                 case HDIO_DRIVE_CMD:
1335                         if (!capable(CAP_SYS_RAWIO))
1336                                 return -EACCES;
1337                         return ide_cmd_ioctl(drive, cmd, arg);
1338
1339                 case HDIO_DRIVE_TASK:
1340                         if (!capable(CAP_SYS_RAWIO))
1341                                 return -EACCES;
1342                         return ide_task_ioctl(drive, cmd, arg);
1343
1344                 case HDIO_SCAN_HWIF:
1345                 {
1346                         hw_regs_t hw;
1347                         int args[3];
1348                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1349                         if (copy_from_user(args, p, 3 * sizeof(int)))
1350                                 return -EFAULT;
1351                         memset(&hw, 0, sizeof(hw));
1352                         ide_init_hwif_ports(&hw, (unsigned long) args[0],
1353                                             (unsigned long) args[1], NULL);
1354                         hw.irq = args[2];
1355                         if (ide_register_hw(&hw, NULL) == -1)
1356                                 return -EIO;
1357                         return 0;
1358                 }
1359                 case HDIO_UNREGISTER_HWIF:
1360                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1361                         /* (arg > MAX_HWIFS) checked in function */
1362                         ide_unregister(arg);
1363                         return 0;
1364                 case HDIO_SET_NICE:
1365                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1366                         if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1367                                 return -EPERM;
1368                         drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1369                         drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1370                         if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1371                                 drive->dsc_overlap = 0;
1372                                 return -EPERM;
1373                         }
1374                         drive->nice1 = (arg >> IDE_NICE_1) & 1;
1375                         return 0;
1376                 case HDIO_DRIVE_RESET:
1377                 {
1378                         unsigned long flags;
1379                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1380
1381                         /*
1382                          *      Abort the current command on the
1383                          *      group if there is one, taking
1384                          *      care not to allow anything else
1385                          *      to be queued and to die on the
1386                          *      spot if we miss one somehow
1387                          */
1388
1389                         spin_lock_irqsave(&ide_lock, flags);
1390
1391                         ide_abort(drive, "drive reset");
1392
1393                         if(HWGROUP(drive)->handler)
1394                                 BUG();
1395
1396                         /* Ensure nothing gets queued after we
1397                            drop the lock. Reset will clear the busy */
1398
1399                         HWGROUP(drive)->busy = 1;
1400                         spin_unlock_irqrestore(&ide_lock, flags);
1401                         (void) ide_do_reset(drive);
1402
1403                         return 0;
1404                 }
1405
1406                 case CDROMEJECT:
1407                 case CDROMCLOSETRAY:
1408                         return scsi_cmd_ioctl(file, bdev->bd_disk, cmd, p);
1409
1410                 case HDIO_GET_BUSSTATE:
1411                         if (!capable(CAP_SYS_ADMIN))
1412                                 return -EACCES;
1413                         if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1414                                 return -EFAULT;
1415                         return 0;
1416
1417                 case HDIO_SET_BUSSTATE:
1418                         if (!capable(CAP_SYS_ADMIN))
1419                                 return -EACCES;
1420                         if (HWIF(drive)->busproc)
1421                                 return HWIF(drive)->busproc(drive, (int)arg);
1422                         return -EOPNOTSUPP;
1423                 default:
1424                         return -EINVAL;
1425         }
1426 }
1427
1428 EXPORT_SYMBOL(generic_ide_ioctl);
1429
1430 /*
1431  * stridx() returns the offset of c within s,
1432  * or -1 if c is '\0' or not found within s.
1433  */
1434 static int __init stridx (const char *s, char c)
1435 {
1436         char *i = strchr(s, c);
1437         return (i && c) ? i - s : -1;
1438 }
1439
1440 /*
1441  * match_parm() does parsing for ide_setup():
1442  *
1443  * 1. the first char of s must be '='.
1444  * 2. if the remainder matches one of the supplied keywords,
1445  *     the index (1 based) of the keyword is negated and returned.
1446  * 3. if the remainder is a series of no more than max_vals numbers
1447  *     separated by commas, the numbers are saved in vals[] and a
1448  *     count of how many were saved is returned.  Base10 is assumed,
1449  *     and base16 is allowed when prefixed with "0x".
1450  * 4. otherwise, zero is returned.
1451  */
1452 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1453 {
1454         static const char *decimal = "0123456789";
1455         static const char *hex = "0123456789abcdef";
1456         int i, n;
1457
1458         if (*s++ == '=') {
1459                 /*
1460                  * Try matching against the supplied keywords,
1461                  * and return -(index+1) if we match one
1462                  */
1463                 if (keywords != NULL) {
1464                         for (i = 0; *keywords != NULL; ++i) {
1465                                 if (!strcmp(s, *keywords++))
1466                                         return -(i+1);
1467                         }
1468                 }
1469                 /*
1470                  * Look for a series of no more than "max_vals"
1471                  * numeric values separated by commas, in base10,
1472                  * or base16 when prefixed with "0x".
1473                  * Return a count of how many were found.
1474                  */
1475                 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1476                         vals[n] = i;
1477                         while ((i = stridx(decimal, *++s)) >= 0)
1478                                 vals[n] = (vals[n] * 10) + i;
1479                         if (*s == 'x' && !vals[n]) {
1480                                 while ((i = stridx(hex, *++s)) >= 0)
1481                                         vals[n] = (vals[n] * 0x10) + i;
1482                         }
1483                         if (++n == max_vals)
1484                                 break;
1485                         if (*s == ',' || *s == ';')
1486                                 ++s;
1487                 }
1488                 if (!*s)
1489                         return n;
1490         }
1491         return 0;       /* zero = nothing matched */
1492 }
1493
1494 #ifdef CONFIG_BLK_DEV_ALI14XX
1495 static int __initdata probe_ali14xx;
1496 extern int ali14xx_init(void);
1497 #endif
1498 #ifdef CONFIG_BLK_DEV_UMC8672
1499 static int __initdata probe_umc8672;
1500 extern int umc8672_init(void);
1501 #endif
1502 #ifdef CONFIG_BLK_DEV_DTC2278
1503 static int __initdata probe_dtc2278;
1504 extern int dtc2278_init(void);
1505 #endif
1506 #ifdef CONFIG_BLK_DEV_HT6560B
1507 static int __initdata probe_ht6560b;
1508 extern int ht6560b_init(void);
1509 #endif
1510 #ifdef CONFIG_BLK_DEV_QD65XX
1511 static int __initdata probe_qd65xx;
1512 extern int qd65xx_init(void);
1513 #endif
1514
1515 static int __initdata is_chipset_set[MAX_HWIFS];
1516
1517 /*
1518  * ide_setup() gets called VERY EARLY during initialization,
1519  * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1520  *
1521  * Remember to update Documentation/ide.txt if you change something here.
1522  */
1523 static int __init ide_setup(char *s)
1524 {
1525         int i, vals[3];
1526         ide_hwif_t *hwif;
1527         ide_drive_t *drive;
1528         unsigned int hw, unit;
1529         const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1530         const char max_hwif  = '0' + (MAX_HWIFS - 1);
1531
1532
1533         if (strncmp(s,"hd",2) == 0 && s[2] == '=')      /* hd= is for hd.c   */
1534                 return 0;                               /* driver and not us */
1535
1536         if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1537                 return 0;
1538
1539         printk(KERN_INFO "ide_setup: %s", s);
1540         init_ide_data ();
1541
1542 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1543         if (!strcmp(s, "ide=doubler")) {
1544                 extern int ide_doubler;
1545
1546                 printk(" : Enabled support for IDE doublers\n");
1547                 ide_doubler = 1;
1548                 return 1;
1549         }
1550 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1551
1552         if (!strcmp(s, "ide=nodma")) {
1553                 printk(" : Prevented DMA\n");
1554                 noautodma = 1;
1555                 return 1;
1556         }
1557
1558 #ifdef CONFIG_BLK_DEV_IDEPCI
1559         if (!strcmp(s, "ide=reverse")) {
1560                 ide_scan_direction = 1;
1561                 printk(" : Enabled support for IDE inverse scan order.\n");
1562                 return 1;
1563         }
1564 #endif /* CONFIG_BLK_DEV_IDEPCI */
1565
1566 #ifdef CONFIG_BLK_DEV_IDEACPI
1567         if (!strcmp(s, "ide=noacpi")) {
1568                 //printk(" : Disable IDE ACPI support.\n");
1569                 ide_noacpi = 1;
1570                 return 1;
1571         }
1572         if (!strcmp(s, "ide=acpigtf")) {
1573                 //printk(" : Enable IDE ACPI _GTF support.\n");
1574                 ide_noacpitfs = 0;
1575                 return 1;
1576         }
1577         if (!strcmp(s, "ide=acpionboot")) {
1578                 //printk(" : Call IDE ACPI methods on boot.\n");
1579                 ide_noacpionboot = 0;
1580                 return 1;
1581         }
1582 #endif /* CONFIG_BLK_DEV_IDEACPI */
1583
1584         if (!strncmp(s, "idewait=", 8)) {
1585                 char *dummy;
1586                 ide_wait_ms = simple_strtol(s+8, &dummy, 10);
1587                 printk(KERN_INFO " : Wait for %i ms\n", ide_wait_ms);
1588                 return 1;
1589         }
1590
1591         /*
1592          * Look for drive options:  "hdx="
1593          */
1594         if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1595                 const char *hd_words[] = {
1596                         "none", "noprobe", "nowerr", "cdrom", "serialize",
1597                         "autotune", "noautotune", "minus8", "swapdata", "bswap",
1598                         "noflush", "remap", "remap63", "scsi", NULL };
1599                 unit = s[2] - 'a';
1600                 hw   = unit / MAX_DRIVES;
1601                 unit = unit % MAX_DRIVES;
1602                 hwif = &ide_hwifs[hw];
1603                 drive = &hwif->drives[unit];
1604                 if (strncmp(s + 4, "ide-", 4) == 0) {
1605                         strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1606                         goto done;
1607                 }
1608                 switch (match_parm(&s[3], hd_words, vals, 3)) {
1609                         case -1: /* "none" */
1610                         case -2: /* "noprobe" */
1611                                 drive->noprobe = 1;
1612                                 goto done;
1613                         case -3: /* "nowerr" */
1614                                 drive->bad_wstat = BAD_R_STAT;
1615                                 hwif->noprobe = 0;
1616                                 goto done;
1617                         case -4: /* "cdrom" */
1618                                 drive->present = 1;
1619                                 drive->media = ide_cdrom;
1620                                 /* an ATAPI device ignores DRDY */
1621                                 drive->ready_stat = 0;
1622                                 hwif->noprobe = 0;
1623                                 goto done;
1624                         case -5: /* "serialize" */
1625                                 printk(" -- USE \"ide%d=serialize\" INSTEAD", hw);
1626                                 goto do_serialize;
1627                         case -6: /* "autotune" */
1628                                 drive->autotune = IDE_TUNE_AUTO;
1629                                 goto obsolete_option;
1630                         case -7: /* "noautotune" */
1631                                 drive->autotune = IDE_TUNE_NOAUTO;
1632                                 goto obsolete_option;
1633                         case -9: /* "swapdata" */
1634                         case -10: /* "bswap" */
1635                                 drive->bswap = 1;
1636                                 goto done;
1637                         case -11: /* noflush */
1638                                 drive->noflush = 1;
1639                                 goto done;
1640                         case -12: /* "remap" */
1641                                 drive->remap_0_to_1 = 1;
1642                                 goto done;
1643                         case -13: /* "remap63" */
1644                                 drive->sect0 = 63;
1645                                 goto done;
1646                         case -14: /* "scsi" */
1647                                 drive->scsi = 1;
1648                                 goto done;
1649                         case 3: /* cyl,head,sect */
1650                                 drive->media    = ide_disk;
1651                                 drive->ready_stat = READY_STAT;
1652                                 drive->cyl      = drive->bios_cyl  = vals[0];
1653                                 drive->head     = drive->bios_head = vals[1];
1654                                 drive->sect     = drive->bios_sect = vals[2];
1655                                 drive->present  = 1;
1656                                 drive->forced_geom = 1;
1657                                 hwif->noprobe = 0;
1658                                 goto done;
1659                         default:
1660                                 goto bad_option;
1661                 }
1662         }
1663
1664         if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1665                 goto bad_option;
1666         /*
1667          * Look for bus speed option:  "idebus="
1668          */
1669         if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1670                 if (match_parm(&s[6], NULL, vals, 1) != 1)
1671                         goto bad_option;
1672                 if (vals[0] >= 20 && vals[0] <= 66) {
1673                         idebus_parameter = vals[0];
1674                 } else
1675                         printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1676                 goto done;
1677         }
1678         /*
1679          * Look for interface options:  "idex="
1680          */
1681         if (s[3] >= '0' && s[3] <= max_hwif) {
1682                 /*
1683                  * Be VERY CAREFUL changing this: note hardcoded indexes below
1684                  * (-8, -9, -10) are reserved to ease the hardcoding.
1685                  */
1686                 static const char *ide_words[] = {
1687                         "noprobe", "serialize", "autotune", "noautotune",
1688                         "reset", "dma", "ata66", "minus8", "minus9",
1689                         "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1690                         "dtc2278", "umc8672", "ali14xx", NULL };
1691                 hw = s[3] - '0';
1692                 hwif = &ide_hwifs[hw];
1693                 i = match_parm(&s[4], ide_words, vals, 3);
1694
1695                 /*
1696                  * Cryptic check to ensure chipset not already set for hwif.
1697                  * Note: we can't depend on hwif->chipset here.
1698                  */
1699                 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1700                         /* chipset already specified */
1701                         if (is_chipset_set[hw])
1702                                 goto bad_option;
1703                         if (i > -18 && i <= -11) {
1704                                 /* these drivers are for "ide0=" only */
1705                                 if (hw != 0)
1706                                         goto bad_hwif;
1707                                 /* chipset already specified for 2nd port */
1708                                 if (is_chipset_set[hw+1])
1709                                         goto bad_option;
1710                         }
1711                         is_chipset_set[hw] = 1;
1712                         printk("\n");
1713                 }
1714
1715                 switch (i) {
1716 #ifdef CONFIG_BLK_DEV_ALI14XX
1717                         case -17: /* "ali14xx" */
1718                                 probe_ali14xx = 1;
1719                                 goto done;
1720 #endif
1721 #ifdef CONFIG_BLK_DEV_UMC8672
1722                         case -16: /* "umc8672" */
1723                                 probe_umc8672 = 1;
1724                                 goto done;
1725 #endif
1726 #ifdef CONFIG_BLK_DEV_DTC2278
1727                         case -15: /* "dtc2278" */
1728                                 probe_dtc2278 = 1;
1729                                 goto done;
1730 #endif
1731 #ifdef CONFIG_BLK_DEV_CMD640
1732                         case -14: /* "cmd640_vlb" */
1733                         {
1734                                 extern int cmd640_vlb; /* flag for cmd640.c */
1735                                 cmd640_vlb = 1;
1736                                 goto done;
1737                         }
1738 #endif
1739 #ifdef CONFIG_BLK_DEV_HT6560B
1740                         case -13: /* "ht6560b" */
1741                                 probe_ht6560b = 1;
1742                                 goto done;
1743 #endif
1744 #ifdef CONFIG_BLK_DEV_QD65XX
1745                         case -12: /* "qd65xx" */
1746                                 probe_qd65xx = 1;
1747                                 goto done;
1748 #endif
1749 #ifdef CONFIG_BLK_DEV_4DRIVES
1750                         case -11: /* "four" drives on one set of ports */
1751                         {
1752                                 ide_hwif_t *mate = &ide_hwifs[hw^1];
1753                                 mate->drives[0].select.all ^= 0x20;
1754                                 mate->drives[1].select.all ^= 0x20;
1755                                 hwif->chipset = mate->chipset = ide_4drives;
1756                                 mate->irq = hwif->irq;
1757                                 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1758                                 goto do_serialize;
1759                         }
1760 #endif /* CONFIG_BLK_DEV_4DRIVES */
1761                         case -10: /* minus10 */
1762                         case -9: /* minus9 */
1763                         case -8: /* minus8 */
1764                                 goto bad_option;
1765                         case -7: /* ata66 */
1766 #ifdef CONFIG_BLK_DEV_IDEPCI
1767                                 hwif->udma_four = 1;
1768                                 goto obsolete_option;
1769 #else
1770                                 goto bad_hwif;
1771 #endif
1772                         case -6: /* dma */
1773                                 hwif->autodma = 1;
1774                                 goto obsolete_option;
1775                         case -5: /* "reset" */
1776                                 hwif->reset = 1;
1777                                 goto obsolete_option;
1778                         case -4: /* "noautotune" */
1779                                 hwif->drives[0].autotune = IDE_TUNE_NOAUTO;
1780                                 hwif->drives[1].autotune = IDE_TUNE_NOAUTO;
1781                                 goto obsolete_option;
1782                         case -3: /* "autotune" */
1783                                 hwif->drives[0].autotune = IDE_TUNE_AUTO;
1784                                 hwif->drives[1].autotune = IDE_TUNE_AUTO;
1785                                 goto obsolete_option;
1786                         case -2: /* "serialize" */
1787                         do_serialize:
1788                                 hwif->mate = &ide_hwifs[hw^1];
1789                                 hwif->mate->mate = hwif;
1790                                 hwif->serialized = hwif->mate->serialized = 1;
1791                                 goto obsolete_option;
1792
1793                         case -1: /* "noprobe" */
1794                                 hwif->noprobe = 1;
1795                                 goto done;
1796
1797                         case 1: /* base */
1798                                 vals[1] = vals[0] + 0x206; /* default ctl */
1799                         case 2: /* base,ctl */
1800                                 vals[2] = 0;    /* default irq = probe for it */
1801                         case 3: /* base,ctl,irq */
1802                                 hwif->hw.irq = vals[2];
1803                                 ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq);
1804                                 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
1805                                 hwif->irq      = vals[2];
1806                                 hwif->noprobe  = 0;
1807                                 hwif->chipset  = ide_forced;
1808                                 goto obsolete_option;
1809
1810                         case 0: goto bad_option;
1811                         default:
1812                                 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1813                                 return 1;
1814                 }
1815         }
1816 bad_option:
1817         printk(" -- BAD OPTION\n");
1818         return 1;
1819 obsolete_option:
1820         printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1821         return 1;
1822 bad_hwif:
1823         printk("-- NOT SUPPORTED ON ide%d", hw);
1824 done:
1825         printk("\n");
1826         return 1;
1827 }
1828
1829 extern void pnpide_init(void);
1830 extern void h8300_ide_init(void);
1831
1832 /*
1833  * probe_for_hwifs() finds/initializes "known" IDE interfaces
1834  */
1835 static void __init probe_for_hwifs (void)
1836 {
1837 #ifdef CONFIG_BLK_DEV_IDEPCI
1838         ide_scan_pcibus(ide_scan_direction);
1839 #endif /* CONFIG_BLK_DEV_IDEPCI */
1840
1841 #ifdef CONFIG_ETRAX_IDE
1842         {
1843                 extern void init_e100_ide(void);
1844                 init_e100_ide();
1845         }
1846 #endif /* CONFIG_ETRAX_IDE */
1847 #ifdef CONFIG_BLK_DEV_CMD640
1848         {
1849                 extern void ide_probe_for_cmd640x(void);
1850                 ide_probe_for_cmd640x();
1851         }
1852 #endif /* CONFIG_BLK_DEV_CMD640 */
1853 #ifdef CONFIG_BLK_DEV_IDE_PMAC
1854         {
1855                 extern void pmac_ide_probe(void);
1856                 pmac_ide_probe();
1857         }
1858 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
1859 #ifdef CONFIG_BLK_DEV_GAYLE
1860         {
1861                 extern void gayle_init(void);
1862                 gayle_init();
1863         }
1864 #endif /* CONFIG_BLK_DEV_GAYLE */
1865 #ifdef CONFIG_BLK_DEV_FALCON_IDE
1866         {
1867                 extern void falconide_init(void);
1868                 falconide_init();
1869         }
1870 #endif /* CONFIG_BLK_DEV_FALCON_IDE */
1871 #ifdef CONFIG_BLK_DEV_MAC_IDE
1872         {
1873                 extern void macide_init(void);
1874                 macide_init();
1875         }
1876 #endif /* CONFIG_BLK_DEV_MAC_IDE */
1877 #ifdef CONFIG_BLK_DEV_Q40IDE
1878         {
1879                 extern void q40ide_init(void);
1880                 q40ide_init();
1881         }
1882 #endif /* CONFIG_BLK_DEV_Q40IDE */
1883 #ifdef CONFIG_BLK_DEV_BUDDHA
1884         {
1885                 extern void buddha_init(void);
1886                 buddha_init();
1887         }
1888 #endif /* CONFIG_BLK_DEV_BUDDHA */
1889 #ifdef CONFIG_BLK_DEV_IDEPNP
1890         pnpide_init();
1891 #endif
1892 #ifdef CONFIG_H8300
1893         h8300_ide_init();
1894 #endif
1895 }
1896
1897 void ide_register_subdriver(ide_drive_t *drive, ide_driver_t *driver)
1898 {
1899 #ifdef CONFIG_PROC_FS
1900         ide_add_proc_entries(drive->proc, driver->proc, drive);
1901 #endif
1902 }
1903
1904 EXPORT_SYMBOL(ide_register_subdriver);
1905
1906 /**
1907  *      ide_unregister_subdriver        -       disconnect drive from driver
1908  *      @drive: drive to unplug
1909  *      @driver: driver
1910  *
1911  *      Disconnect a drive from the driver it was attached to and then
1912  *      clean up the various proc files and other objects attached to it.
1913  *
1914  *      Takes ide_setting_sem and ide_lock.
1915  *      Caller must hold none of the locks.
1916  */
1917
1918 void ide_unregister_subdriver(ide_drive_t *drive, ide_driver_t *driver)
1919 {
1920         unsigned long flags;
1921
1922         down(&ide_setting_sem);
1923         spin_lock_irqsave(&ide_lock, flags);
1924 #ifdef CONFIG_PROC_FS
1925         ide_remove_proc_entries(drive->proc, driver->proc);
1926 #endif
1927         auto_remove_settings(drive);
1928         spin_unlock_irqrestore(&ide_lock, flags);
1929         up(&ide_setting_sem);
1930 }
1931
1932 EXPORT_SYMBOL(ide_unregister_subdriver);
1933
1934 /*
1935  * Probe module
1936  */
1937
1938 EXPORT_SYMBOL(ide_lock);
1939
1940 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1941 {
1942         return 1;
1943 }
1944
1945 static char *media_string(ide_drive_t *drive)
1946 {
1947         switch (drive->media) {
1948         case ide_disk:
1949                 return "disk";
1950         case ide_cdrom:
1951                 return "cdrom";
1952         case ide_tape:
1953                 return "tape";
1954         case ide_floppy:
1955                 return "floppy";
1956         default:
1957                 return "UNKNOWN";
1958         }
1959 }
1960
1961 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1962 {
1963         ide_drive_t *drive = to_ide_device(dev);
1964         return sprintf(buf, "%s\n", media_string(drive));
1965 }
1966
1967 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1968 {
1969         ide_drive_t *drive = to_ide_device(dev);
1970         return sprintf(buf, "%s\n", drive->name);
1971 }
1972
1973 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1974 {
1975         ide_drive_t *drive = to_ide_device(dev);
1976         return sprintf(buf, "ide:m-%s\n", media_string(drive));
1977 }
1978
1979 static struct device_attribute ide_dev_attrs[] = {
1980         __ATTR_RO(media),
1981         __ATTR_RO(drivename),
1982         __ATTR_RO(modalias),
1983         __ATTR_NULL
1984 };
1985
1986 static int ide_uevent(struct device *dev, char **envp, int num_envp,
1987                       char *buffer, int buffer_size)
1988 {
1989         ide_drive_t *drive = to_ide_device(dev);
1990         int i = 0;
1991         int length = 0;
1992
1993         add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1994                        "MEDIA=%s", media_string(drive));
1995         add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1996                        "DRIVENAME=%s", drive->name);
1997         add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1998                        "MODALIAS=ide:m-%s", media_string(drive));
1999         envp[i] = NULL;
2000         return 0;
2001 }
2002
2003 static int generic_ide_probe(struct device *dev)
2004 {
2005         ide_drive_t *drive = to_ide_device(dev);
2006         ide_driver_t *drv = to_ide_driver(dev->driver);
2007
2008         return drv->probe ? drv->probe(drive) : -ENODEV;
2009 }
2010
2011 static int generic_ide_remove(struct device *dev)
2012 {
2013         ide_drive_t *drive = to_ide_device(dev);
2014         ide_driver_t *drv = to_ide_driver(dev->driver);
2015
2016         if (drv->remove)
2017                 drv->remove(drive);
2018
2019         return 0;
2020 }
2021
2022 static void generic_ide_shutdown(struct device *dev)
2023 {
2024         ide_drive_t *drive = to_ide_device(dev);
2025         ide_driver_t *drv = to_ide_driver(dev->driver);
2026
2027         if (dev->driver && drv->shutdown)
2028                 drv->shutdown(drive);
2029 }
2030
2031 struct bus_type ide_bus_type = {
2032         .name           = "ide",
2033         .match          = ide_bus_match,
2034         .uevent         = ide_uevent,
2035         .probe          = generic_ide_probe,
2036         .remove         = generic_ide_remove,
2037         .shutdown       = generic_ide_shutdown,
2038         .dev_attrs      = ide_dev_attrs,
2039         .suspend        = generic_ide_suspend,
2040         .resume         = generic_ide_resume,
2041 };
2042
2043 EXPORT_SYMBOL_GPL(ide_bus_type);
2044
2045 /*
2046  * This is gets invoked once during initialization, to set *everything* up
2047  */
2048 static int __init ide_init(void)
2049 {
2050         printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
2051         devfs_mk_dir("ide");
2052         system_bus_speed = ide_system_bus_speed();
2053
2054         bus_register(&ide_bus_type);
2055
2056         init_ide_data();
2057
2058 #ifdef CONFIG_PROC_FS
2059         proc_ide_root = proc_mkdir("ide", NULL);
2060 #endif
2061
2062 #ifdef CONFIG_BLK_DEV_ALI14XX
2063         if (probe_ali14xx)
2064                 (void)ali14xx_init();
2065 #endif
2066 #ifdef CONFIG_BLK_DEV_UMC8672
2067         if (probe_umc8672)
2068                 (void)umc8672_init();
2069 #endif
2070 #ifdef CONFIG_BLK_DEV_DTC2278
2071         if (probe_dtc2278)
2072                 (void)dtc2278_init();
2073 #endif
2074 #ifdef CONFIG_BLK_DEV_HT6560B
2075         if (probe_ht6560b)
2076                 (void)ht6560b_init();
2077 #endif
2078 #ifdef CONFIG_BLK_DEV_QD65XX
2079         if (probe_qd65xx)
2080                 (void)qd65xx_init();
2081 #endif
2082
2083         initializing = 1;
2084         /* Probe for special PCI and other "known" interface chipsets. */
2085         probe_for_hwifs();
2086         initializing = 0;
2087
2088 #ifdef CONFIG_PROC_FS
2089         proc_ide_create();
2090 #endif
2091         return 0;
2092 }
2093
2094 #ifdef MODULE
2095 static char *options = NULL;
2096 module_param(options, charp, 0);
2097 MODULE_LICENSE("GPL");
2098
2099 static void __init parse_options (char *line)
2100 {
2101         char *next = line;
2102
2103         if (line == NULL || !*line)
2104                 return;
2105         while ((line = next) != NULL) {
2106                 if ((next = strchr(line,' ')) != NULL)
2107                         *next++ = 0;
2108                 if (!ide_setup(line))
2109                         printk (KERN_INFO "Unknown option '%s'\n", line);
2110         }
2111 }
2112
2113 int __init init_module (void)
2114 {
2115         parse_options(options);
2116         return ide_init();
2117 }
2118
2119 void cleanup_module (void)
2120 {
2121         int index;
2122
2123         for (index = 0; index < MAX_HWIFS; ++index)
2124                 ide_unregister(index);
2125
2126 #ifdef CONFIG_PROC_FS
2127         proc_ide_destroy();
2128 #endif
2129         devfs_remove("ide");
2130
2131         bus_unregister(&ide_bus_type);
2132 }
2133
2134 #else /* !MODULE */
2135
2136 __setup("", ide_setup);
2137
2138 module_init(ide_init);
2139
2140 #endif /* MODULE */