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   1 /*
   2  *  linux/drivers/ide/ide.c             Version 7.00beta2       Mar 05 2003
   3  *
   4  *  Copyright (C) 1994-1998  Linus Torvalds & authors (see below)
   5  */
   6
   7 /*
   8  *  Mostly written by Mark Lord  <mlord@pobox.com>
   9  *                and Gadi Oxman <gadio@netvision.net.il>
  10  *                and Andre Hedrick <andre@linux-ide.org>
  11  *
  12  *  See linux/MAINTAINERS for address of current maintainer.
  13  *
  14  * This is the multiple IDE interface driver, as evolved from hd.c.
  15  * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs
  16  *   (usually 14 & 15).
  17  * There can be up to two drives per interface, as per the ATA-2 spec.
  18  *
  19  * 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/module.h>
 134 #include <linux/types.h>
 135 #include <linux/string.h>
 136 #include <linux/kernel.h>
 137 #include <linux/timer.h>
 138 #include <linux/mm.h>
 139 #include <linux/interrupt.h>
 140 #include <linux/major.h>
 141 #include <linux/errno.h>
 142 #include <linux/genhd.h>
 143 #include <linux/blkpg.h>
 144 #include <linux/slab.h>
 145 #include <linux/init.h>
 146 #include <linux/pci.h>
 147 #include <linux/delay.h>
 148 #include <linux/ide.h>
 149 #include <linux/completion.h>
 150 #include <linux/reboot.h>
 151 #include <linux/cdrom.h>
 152 #include <linux/seq_file.h>
 153 #include <linux/device.h>
 154 #include <linux/bitops.h>
 155
 156 #include <asm/byteorder.h>
 157 #include <asm/irq.h>
 158 #include <asm/uaccess.h>
 159 #include <asm/io.h>
 160
 161
 162 /* default maximum number of failures */
 163 #define IDE_DEFAULT_MAX_FAILURES        1
 164
 165 static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
 166                                         IDE2_MAJOR, IDE3_MAJOR,
 167                                         IDE4_MAJOR, IDE5_MAJOR,
 168                                         IDE6_MAJOR, IDE7_MAJOR,
 169                                         IDE8_MAJOR, IDE9_MAJOR };
 170
 171 static int idebus_parameter;    /* holds the "idebus=" parameter */
 172 static int system_bus_speed;    /* holds what we think is VESA/PCI bus speed */
 173 static int initializing;        /* set while initializing built-in drivers */
 174
 175 DECLARE_MUTEX(ide_cfg_sem);
 176  __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
 177
 178 #ifdef CONFIG_BLK_DEV_IDEPCI
 179 static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
 180 #endif
 181
 182 #ifdef CONFIG_IDEDMA_AUTO
 183 int noautodma = 0;
 184 #else
 185 int noautodma = 1;
 186 #endif
 187
 188 EXPORT_SYMBOL(noautodma);
 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         hwif->ultra_mask = 0x80;        /* disable all ultra */
 220         hwif->mwdma_mask = 0x80;        /* disable all mwdma */
 221         hwif->swdma_mask = 0x80;        /* disable all swdma */
 222
 223         init_completion(&hwif->gendev_rel_comp);
 224
 225         default_hwif_iops(hwif);
 226         default_hwif_transport(hwif);
 227         for (unit = 0; unit < MAX_DRIVES; ++unit) {
 228                 ide_drive_t *drive = &hwif->drives[unit];
 229
 230                 drive->media                    = ide_disk;
 231                 drive->select.all               = (unit<<4)|0xa0;
 232                 drive->hwif                     = hwif;
 233                 drive->ctl                      = 0x08;
 234                 drive->ready_stat               = READY_STAT;
 235                 drive->bad_wstat                = BAD_W_STAT;
 236                 drive->special.b.recalibrate    = 1;
 237                 drive->special.b.set_geometry   = 1;
 238                 drive->name[0]                  = 'h';
 239                 drive->name[1]                  = 'd';
 240                 drive->name[2]                  = 'a' + (index * MAX_DRIVES) + unit;
 241                 drive->max_failures             = IDE_DEFAULT_MAX_FAILURES;
 242                 drive->using_dma                = 0;
 243                 drive->vdma                     = 0;
 244                 INIT_LIST_HEAD(&drive->list);
 245                 init_completion(&drive->gendev_rel_comp);
 246         }
 247 }
 248
 249 static void init_hwif_default(ide_hwif_t *hwif, unsigned int index)
 250 {
 251         hw_regs_t hw;
 252
 253         memset(&hw, 0, sizeof(hw_regs_t));
 254
 255         ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq);
 256
 257         memcpy(&hwif->hw, &hw, sizeof(hw));
 258         memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
 259
 260         hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
 261 #ifdef CONFIG_BLK_DEV_HD
 262         if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA)
 263                 hwif->noprobe = 1;      /* may be overridden by ide_setup() */
 264 #endif
 265 }
 266
 267 extern void ide_arm_init(void);
 268
 269 /*
 270  * init_ide_data() sets reasonable default values into all fields
 271  * of all instances of the hwifs and drives, but only on the first call.
 272  * Subsequent calls have no effect (they don't wipe out anything).
 273  *
 274  * This routine is normally called at driver initialization time,
 275  * but may also be called MUCH earlier during kernel "command-line"
 276  * parameter processing.  As such, we cannot depend on any other parts
 277  * of the kernel (such as memory allocation) to be functioning yet.
 278  *
 279  * This is too bad, as otherwise we could dynamically allocate the
 280  * ide_drive_t structs as needed, rather than always consuming memory
 281  * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
 282  *
 283  * FIXME: We should stuff the setup data into __init and copy the
 284  * relevant hwifs/allocate them properly during boot.
 285  */
 286 #define MAGIC_COOKIE 0x12345678
 287 static void __init init_ide_data (void)
 288 {
 289         ide_hwif_t *hwif;
 290         unsigned int index;
 291         static unsigned long magic_cookie = MAGIC_COOKIE;
 292
 293         if (magic_cookie != MAGIC_COOKIE)
 294                 return;         /* already initialized */
 295         magic_cookie = 0;
 296
 297         /* Initialise all interface structures */
 298         for (index = 0; index < MAX_HWIFS; ++index) {
 299                 hwif = &ide_hwifs[index];
 300                 init_hwif_data(hwif, index);
 301                 init_hwif_default(hwif, index);
 302 #if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
 303                 hwif->irq = hwif->hw.irq =
 304                         ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
 305 #endif
 306         }
 307 #ifdef CONFIG_IDE_ARM
 308         initializing = 1;
 309         ide_arm_init();
 310         initializing = 0;
 311 #endif
 312 }
 313
 314 /**
 315  *      ide_system_bus_speed    -       guess bus speed
 316  *
 317  *      ide_system_bus_speed() returns what we think is the system VESA/PCI
 318  *      bus speed (in MHz). This is used for calculating interface PIO timings.
 319  *      The default is 40 for known PCI systems, 50 otherwise.
 320  *      The "idebus=xx" parameter can be used to override this value.
 321  *      The actual value to be used is computed/displayed the first time
 322  *      through. Drivers should only use this as a last resort.
 323  *
 324  *      Returns a guessed speed in MHz.
 325  */
 326
 327 static int ide_system_bus_speed(void)
 328 {
 329 #ifdef CONFIG_PCI
 330         static struct pci_device_id pci_default[] = {
 331                 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
 332                 { }
 333         };
 334 #else
 335 #define pci_default 0
 336 #endif /* CONFIG_PCI */
 337
 338         if (!system_bus_speed) {
 339                 if (idebus_parameter) {
 340                         /* user supplied value */
 341                         system_bus_speed = idebus_parameter;
 342                 } else if (pci_dev_present(pci_default)) {
 343                         /* safe default value for PCI */
 344                         system_bus_speed = 33;
 345                 } else {
 346                         /* safe default value for VESA and PCI */
 347                         system_bus_speed = 50;
 348                 }
 349                 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
 350                         "for PIO modes%s\n", system_bus_speed,
 351                         idebus_parameter ? "" : "; override with idebus=xx");
 352         }
 353         return system_bus_speed;
 354 }
 355
 356 #ifdef CONFIG_PROC_FS
 357 struct proc_dir_entry *proc_ide_root;
 358 #endif
 359
 360 static struct resource* hwif_request_region(ide_hwif_t *hwif,
 361                                             unsigned long addr, int num)
 362 {
 363         struct resource *res = request_region(addr, num, hwif->name);
 364
 365         if (!res)
 366                 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
 367                                 hwif->name, addr, addr+num-1);
 368         return res;
 369 }
 370
 371 /**
 372  *      ide_hwif_request_regions - request resources for IDE
 373  *      @hwif: interface to use
 374  *
 375  *      Requests all the needed resources for an interface.
 376  *      Right now core IDE code does this work which is deeply wrong.
 377  *      MMIO leaves it to the controller driver,
 378  *      PIO will migrate this way over time.
 379  */
 380
 381 int ide_hwif_request_regions(ide_hwif_t *hwif)
 382 {
 383         unsigned long addr;
 384         unsigned int i;
 385
 386         if (hwif->mmio == 2)
 387                 return 0;
 388         BUG_ON(hwif->mmio == 1);
 389         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
 390         if (addr && !hwif_request_region(hwif, addr, 1))
 391                 goto control_region_busy;
 392         hwif->straight8 = 0;
 393         addr = hwif->io_ports[IDE_DATA_OFFSET];
 394         if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
 395                 if (!hwif_request_region(hwif, addr, 8))
 396                         goto data_region_busy;
 397                 hwif->straight8 = 1;
 398                 return 0;
 399         }
 400         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
 401                 addr = hwif->io_ports[i];
 402                 if (!hwif_request_region(hwif, addr, 1)) {
 403                         while (--i)
 404                                 release_region(addr, 1);
 405                         goto data_region_busy;
 406                 }
 407         }
 408         return 0;
 409
 410 data_region_busy:
 411         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
 412         if (addr)
 413                 release_region(addr, 1);
 414 control_region_busy:
 415         /* If any errors are return, we drop the hwif interface. */
 416         return -EBUSY;
 417 }
 418
 419 /**
 420  *      ide_hwif_release_regions - free IDE resources
 421  *
 422  *      Note that we only release the standard ports,
 423  *      and do not even try to handle any extra ports
 424  *      allocated for weird IDE interface chipsets.
 425  *
 426  *      Note also that we don't yet handle mmio resources here. More
 427  *      importantly our caller should be doing this so we need to
 428  *      restructure this as a helper function for drivers.
 429  */
 430
 431 void ide_hwif_release_regions(ide_hwif_t *hwif)
 432 {
 433         u32 i = 0;
 434
 435         if (hwif->mmio == 2)
 436                 return;
 437         if (hwif->io_ports[IDE_CONTROL_OFFSET])
 438                 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
 439         if (hwif->straight8) {
 440                 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
 441                 return;
 442         }
 443         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
 444                 if (hwif->io_ports[i])
 445                         release_region(hwif->io_ports[i], 1);
 446 }
 447
 448 /**
 449  *      ide_hwif_restore        -       restore hwif to template
 450  *      @hwif: hwif to update
 451  *      @tmp_hwif: template
 452  *
 453  *      Restore hwif to a previous state by copying most settngs
 454  *      from the template.
 455  */
 456
 457 static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
 458 {
 459         hwif->hwgroup                   = tmp_hwif->hwgroup;
 460
 461         hwif->gendev.parent             = tmp_hwif->gendev.parent;
 462
 463         hwif->proc                      = tmp_hwif->proc;
 464
 465         hwif->major                     = tmp_hwif->major;
 466         hwif->straight8                 = tmp_hwif->straight8;
 467         hwif->bus_state                 = tmp_hwif->bus_state;
 468
 469         hwif->atapi_dma                 = tmp_hwif->atapi_dma;
 470         hwif->ultra_mask                = tmp_hwif->ultra_mask;
 471         hwif->mwdma_mask                = tmp_hwif->mwdma_mask;
 472         hwif->swdma_mask                = tmp_hwif->swdma_mask;
 473
 474         hwif->chipset                   = tmp_hwif->chipset;
 475         hwif->hold                      = tmp_hwif->hold;
 476
 477 #ifdef CONFIG_BLK_DEV_IDEPCI
 478         hwif->pci_dev                   = tmp_hwif->pci_dev;
 479         hwif->cds                       = tmp_hwif->cds;
 480 #endif
 481
 482         hwif->tuneproc                  = tmp_hwif->tuneproc;
 483         hwif->speedproc                 = tmp_hwif->speedproc;
 484         hwif->selectproc                = tmp_hwif->selectproc;
 485         hwif->reset_poll                = tmp_hwif->reset_poll;
 486         hwif->pre_reset                 = tmp_hwif->pre_reset;
 487         hwif->resetproc                 = tmp_hwif->resetproc;
 488         hwif->intrproc                  = tmp_hwif->intrproc;
 489         hwif->maskproc                  = tmp_hwif->maskproc;
 490         hwif->quirkproc                 = tmp_hwif->quirkproc;
 491         hwif->busproc                   = tmp_hwif->busproc;
 492
 493         hwif->ata_input_data            = tmp_hwif->ata_input_data;
 494         hwif->ata_output_data           = tmp_hwif->ata_output_data;
 495         hwif->atapi_input_bytes         = tmp_hwif->atapi_input_bytes;
 496         hwif->atapi_output_bytes        = tmp_hwif->atapi_output_bytes;
 497
 498         hwif->dma_setup                 = tmp_hwif->dma_setup;
 499         hwif->dma_exec_cmd              = tmp_hwif->dma_exec_cmd;
 500         hwif->dma_start                 = tmp_hwif->dma_start;
 501         hwif->ide_dma_end               = tmp_hwif->ide_dma_end;
 502         hwif->ide_dma_check             = tmp_hwif->ide_dma_check;
 503         hwif->ide_dma_on                = tmp_hwif->ide_dma_on;
 504         hwif->ide_dma_off_quietly       = tmp_hwif->ide_dma_off_quietly;
 505         hwif->ide_dma_test_irq          = tmp_hwif->ide_dma_test_irq;
 506         hwif->ide_dma_host_on           = tmp_hwif->ide_dma_host_on;
 507         hwif->ide_dma_host_off          = tmp_hwif->ide_dma_host_off;
 508         hwif->ide_dma_lostirq           = tmp_hwif->ide_dma_lostirq;
 509         hwif->ide_dma_timeout           = tmp_hwif->ide_dma_timeout;
 510
 511         hwif->OUTB                      = tmp_hwif->OUTB;
 512         hwif->OUTBSYNC                  = tmp_hwif->OUTBSYNC;
 513         hwif->OUTW                      = tmp_hwif->OUTW;
 514         hwif->OUTL                      = tmp_hwif->OUTL;
 515         hwif->OUTSW                     = tmp_hwif->OUTSW;
 516         hwif->OUTSL                     = tmp_hwif->OUTSL;
 517
 518         hwif->INB                       = tmp_hwif->INB;
 519         hwif->INW                       = tmp_hwif->INW;
 520         hwif->INL                       = tmp_hwif->INL;
 521         hwif->INSW                      = tmp_hwif->INSW;
 522         hwif->INSL                      = tmp_hwif->INSL;
 523
 524         hwif->sg_max_nents              = tmp_hwif->sg_max_nents;
 525
 526         hwif->mmio                      = tmp_hwif->mmio;
 527         hwif->rqsize                    = tmp_hwif->rqsize;
 528         hwif->no_lba48                  = tmp_hwif->no_lba48;
 529
 530 #ifndef CONFIG_BLK_DEV_IDECS
 531         hwif->irq                       = tmp_hwif->irq;
 532 #endif
 533
 534         hwif->dma_base                  = tmp_hwif->dma_base;
 535         hwif->dma_master                = tmp_hwif->dma_master;
 536         hwif->dma_command               = tmp_hwif->dma_command;
 537         hwif->dma_vendor1               = tmp_hwif->dma_vendor1;
 538         hwif->dma_status                = tmp_hwif->dma_status;
 539         hwif->dma_vendor3               = tmp_hwif->dma_vendor3;
 540         hwif->dma_prdtable              = tmp_hwif->dma_prdtable;
 541
 542         hwif->dma_extra                 = tmp_hwif->dma_extra;
 543         hwif->config_data               = tmp_hwif->config_data;
 544         hwif->select_data               = tmp_hwif->select_data;
 545         hwif->autodma                   = tmp_hwif->autodma;
 546         hwif->udma_four                 = tmp_hwif->udma_four;
 547         hwif->no_dsc                    = tmp_hwif->no_dsc;
 548
 549         hwif->hwif_data                 = tmp_hwif->hwif_data;
 550 }
 551
 552 /**
 553  *      ide_unregister          -       free an ide interface
 554  *      @index: index of interface (will change soon to a pointer)
 555  *
 556  *      Perform the final unregister of an IDE interface. At the moment
 557  *      we don't refcount interfaces so this will also get split up.
 558  *
 559  *      Locking:
 560  *      The caller must not hold the IDE locks
 561  *      The drive present/vanishing is not yet properly locked
 562  *      Take care with the callbacks. These have been split to avoid
 563  *      deadlocking the IDE layer. The shutdown callback is called
 564  *      before we take the lock and free resources. It is up to the
 565  *      caller to be sure there is no pending I/O here, and that
 566  *      the interfce will not be reopened (present/vanishing locking
 567  *      isnt yet done btw). After we commit to the final kill we
 568  *      call the cleanup callback with the ide locks held.
 569  *
 570  *      Unregister restores the hwif structures to the default state.
 571  *      This is raving bonkers.
 572  */
 573
 574 void ide_unregister(unsigned int index)
 575 {
 576         ide_drive_t *drive;
 577         ide_hwif_t *hwif, *g;
 578         static ide_hwif_t tmp_hwif; /* protected by ide_cfg_sem */
 579         ide_hwgroup_t *hwgroup;
 580         int irq_count = 0, unit;
 581
 582         BUG_ON(index >= MAX_HWIFS);
 583
 584         BUG_ON(in_interrupt());
 585         BUG_ON(irqs_disabled());
 586         down(&ide_cfg_sem);
 587         spin_lock_irq(&ide_lock);
 588         hwif = &ide_hwifs[index];
 589         if (!hwif->present)
 590                 goto abort;
 591         for (unit = 0; unit < MAX_DRIVES; ++unit) {
 592                 drive = &hwif->drives[unit];
 593                 if (!drive->present)
 594                         continue;
 595                 spin_unlock_irq(&ide_lock);
 596                 device_unregister(&drive->gendev);
 597                 wait_for_completion(&drive->gendev_rel_comp);
 598                 spin_lock_irq(&ide_lock);
 599         }
 600         hwif->present = 0;
 601
 602         spin_unlock_irq(&ide_lock);
 603
 604         destroy_proc_ide_interface(hwif);
 605
 606         hwgroup = hwif->hwgroup;
 607         /*
 608          * free the irq if we were the only hwif using it
 609          */
 610         g = hwgroup->hwif;
 611         do {
 612                 if (g->irq == hwif->irq)
 613                         ++irq_count;
 614                 g = g->next;
 615         } while (g != hwgroup->hwif);
 616         if (irq_count == 1)
 617                 free_irq(hwif->irq, hwgroup);
 618
 619         spin_lock_irq(&ide_lock);
 620         /*
 621          * Note that we only release the standard ports,
 622          * and do not even try to handle any extra ports
 623          * allocated for weird IDE interface chipsets.
 624          */
 625         ide_hwif_release_regions(hwif);
 626
 627         /*
 628          * Remove us from the hwgroup, and free
 629          * the hwgroup if we were the only member
 630          */
 631         if (hwif->next == hwif) {
 632                 BUG_ON(hwgroup->hwif != hwif);
 633                 kfree(hwgroup);
 634         } else {
 635                 /* There is another interface in hwgroup.
 636                  * Unlink us, and set hwgroup->drive and ->hwif to
 637                  * something sane.
 638                  */
 639                 g = hwgroup->hwif;
 640                 while (g->next != hwif)
 641                         g = g->next;
 642                 g->next = hwif->next;
 643                 if (hwgroup->hwif == hwif) {
 644                         /* Chose a random hwif for hwgroup->hwif.
 645                          * It's guaranteed that there are no drives
 646                          * left in the hwgroup.
 647                          */
 648                         BUG_ON(hwgroup->drive != NULL);
 649                         hwgroup->hwif = g;
 650                 }
 651                 BUG_ON(hwgroup->hwif == hwif);
 652         }
 653
 654         /* More messed up locking ... */
 655         spin_unlock_irq(&ide_lock);
 656         device_unregister(&hwif->gendev);
 657         wait_for_completion(&hwif->gendev_rel_comp);
 658
 659         /*
 660          * Remove us from the kernel's knowledge
 661          */
 662         blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
 663         kfree(hwif->sg_table);
 664         unregister_blkdev(hwif->major, hwif->name);
 665         spin_lock_irq(&ide_lock);
 666
 667         if (hwif->dma_base) {
 668                 (void) ide_release_dma(hwif);
 669
 670                 hwif->dma_base = 0;
 671                 hwif->dma_master = 0;
 672                 hwif->dma_command = 0;
 673                 hwif->dma_vendor1 = 0;
 674                 hwif->dma_status = 0;
 675                 hwif->dma_vendor3 = 0;
 676                 hwif->dma_prdtable = 0;
 677         }
 678
 679         /* copy original settings */
 680         tmp_hwif = *hwif;
 681
 682         /* restore hwif data to pristine status */
 683         init_hwif_data(hwif, index);
 684         init_hwif_default(hwif, index);
 685
 686         ide_hwif_restore(hwif, &tmp_hwif);
 687
 688 abort:
 689         spin_unlock_irq(&ide_lock);
 690         up(&ide_cfg_sem);
 691 }
 692
 693 EXPORT_SYMBOL(ide_unregister);
 694
 695
 696 /**
 697  *      ide_setup_ports         -       set up IDE interface ports
 698  *      @hw: register descriptions
 699  *      @base: base register
 700  *      @offsets: table of register offsets
 701  *      @ctrl: control register
 702  *      @ack_irq: IRQ ack
 703  *      @irq: interrupt lie
 704  *
 705  *      Setup hw_regs_t structure described by parameters.  You
 706  *      may set up the hw structure yourself OR use this routine to
 707  *      do it for you. This is basically a helper
 708  *
 709  */
 710
 711 void ide_setup_ports (  hw_regs_t *hw,
 712                         unsigned long base, int *offsets,
 713                         unsigned long ctrl, unsigned long intr,
 714                         ide_ack_intr_t *ack_intr,
 715 /*
 716  *                      ide_io_ops_t *iops,
 717  */
 718                         int irq)
 719 {
 720         int i;
 721
 722         memset(hw, 0, sizeof(hw_regs_t));
 723         for (i = 0; i < IDE_NR_PORTS; i++) {
 724                 if (offsets[i] == -1) {
 725                         switch(i) {
 726                                 case IDE_CONTROL_OFFSET:
 727                                         hw->io_ports[i] = ctrl;
 728                                         break;
 729 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
 730                                 case IDE_IRQ_OFFSET:
 731                                         hw->io_ports[i] = intr;
 732                                         break;
 733 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
 734                                 default:
 735                                         hw->io_ports[i] = 0;
 736                                         break;
 737                         }
 738                 } else {
 739                         hw->io_ports[i] = base + offsets[i];
 740                 }
 741         }
 742         hw->irq = irq;
 743         hw->dma = NO_DMA;
 744         hw->ack_intr = ack_intr;
 745 /*
 746  *      hw->iops = iops;
 747  */
 748 }
 749
 750 /**
 751  *      ide_register_hw_with_fixup      -       register IDE interface
 752  *      @hw: hardware registers
 753  *      @hwifp: pointer to returned hwif
 754  *      @fixup: fixup function
 755  *
 756  *      Register an IDE interface, specifying exactly the registers etc.
 757  *      Set init=1 iff calling before probes have taken place.
 758  *
 759  *      Returns -1 on error.
 760  */
 761
 762 int ide_register_hw_with_fixup(hw_regs_t *hw, ide_hwif_t **hwifp, void(*fixup)(ide_hwif_t *hwif))
 763 {
 764         int index, retry = 1;
 765         ide_hwif_t *hwif;
 766
 767         do {
 768                 for (index = 0; index < MAX_HWIFS; ++index) {
 769                         hwif = &ide_hwifs[index];
 770                         if (hwif->hw.io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
 771                                 goto found;
 772                 }
 773                 for (index = 0; index < MAX_HWIFS; ++index) {
 774                         hwif = &ide_hwifs[index];
 775                         if (hwif->hold)
 776                                 continue;
 777                         if ((!hwif->present && !hwif->mate && !initializing) ||
 778                             (!hwif->hw.io_ports[IDE_DATA_OFFSET] && initializing))
 779                                 goto found;
 780                 }
 781                 for (index = 0; index < MAX_HWIFS; index++)
 782                         ide_unregister(index);
 783         } while (retry--);
 784         return -1;
 785 found:
 786         if (hwif->present)
 787                 ide_unregister(index);
 788         else if (!hwif->hold) {
 789                 init_hwif_data(hwif, index);
 790                 init_hwif_default(hwif, index);
 791         }
 792         if (hwif->present)
 793                 return -1;
 794         memcpy(&hwif->hw, hw, sizeof(*hw));
 795         memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports));
 796         hwif->irq = hw->irq;
 797         hwif->noprobe = 0;
 798         hwif->chipset = hw->chipset;
 799         hwif->gendev.parent = hw->dev;
 800
 801         if (!initializing) {
 802                 probe_hwif_init_with_fixup(hwif, fixup);
 803                 create_proc_ide_interfaces();
 804         }
 805
 806         if (hwifp)
 807                 *hwifp = hwif;
 808
 809         return (initializing || hwif->present) ? index : -1;
 810 }
 811
 812 EXPORT_SYMBOL(ide_register_hw_with_fixup);
 813
 814 int ide_register_hw(hw_regs_t *hw, ide_hwif_t **hwifp)
 815 {
 816         return ide_register_hw_with_fixup(hw, hwifp, NULL);
 817 }
 818
 819 EXPORT_SYMBOL(ide_register_hw);
 820
 821 /*
 822  *      Locks for IDE setting functionality
 823  */
 824
 825 DECLARE_MUTEX(ide_setting_sem);
 826
 827 /**
 828  *      __ide_add_setting       -       add an ide setting option
 829  *      @drive: drive to use
 830  *      @name: setting name
 831  *      @rw: true if the function is read write
 832  *      @read_ioctl: function to call on read
 833  *      @write_ioctl: function to call on write
 834  *      @data_type: type of data
 835  *      @min: range minimum
 836  *      @max: range maximum
 837  *      @mul_factor: multiplication scale
 838  *      @div_factor: divison scale
 839  *      @data: private data field
 840  *      @set: setting
 841  *      @auto_remove: setting auto removal flag
 842  *
 843  *      Removes the setting named from the device if it is present.
 844  *      The function takes the settings_lock to protect against
 845  *      parallel changes. This function must not be called from IRQ
 846  *      context. Returns 0 on success or -1 on failure.
 847  *
 848  *      BUGS: This code is seriously over-engineered. There is also
 849  *      magic about how the driver specific features are setup. If
 850  *      a driver is attached we assume the driver settings are auto
 851  *      remove.
 852  */
 853
 854 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)
 855 {
 856         ide_settings_t **p = (ide_settings_t **) &drive->settings, *setting = NULL;
 857
 858         down(&ide_setting_sem);
 859         while ((*p) && strcmp((*p)->name, name) < 0)
 860                 p = &((*p)->next);
 861         if ((setting = kzalloc(sizeof(*setting), GFP_KERNEL)) == NULL)
 862                 goto abort;
 863         if ((setting->name = kmalloc(strlen(name) + 1, GFP_KERNEL)) == NULL)
 864                 goto abort;
 865         strcpy(setting->name, name);
 866         setting->rw = rw;
 867         setting->read_ioctl = read_ioctl;
 868         setting->write_ioctl = write_ioctl;
 869         setting->data_type = data_type;
 870         setting->min = min;
 871         setting->max = max;
 872         setting->mul_factor = mul_factor;
 873         setting->div_factor = div_factor;
 874         setting->data = data;
 875         setting->set = set;
 876
 877         setting->next = *p;
 878         if (auto_remove)
 879                 setting->auto_remove = 1;
 880         *p = setting;
 881         up(&ide_setting_sem);
 882         return 0;
 883 abort:
 884         up(&ide_setting_sem);
 885         kfree(setting);
 886         return -1;
 887 }
 888
 889 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)
 890 {
 891         return __ide_add_setting(drive, name, rw, read_ioctl, write_ioctl, data_type, min, max, mul_factor, div_factor, data, set, 1);
 892 }
 893
 894 EXPORT_SYMBOL(ide_add_setting);
 895
 896 /**
 897  *      __ide_remove_setting    -       remove an ide setting option
 898  *      @drive: drive to use
 899  *      @name: setting name
 900  *
 901  *      Removes the setting named from the device if it is present.
 902  *      The caller must hold the setting semaphore.
 903  */
 904
 905 static void __ide_remove_setting (ide_drive_t *drive, char *name)
 906 {
 907         ide_settings_t **p, *setting;
 908
 909         p = (ide_settings_t **) &drive->settings;
 910
 911         while ((*p) && strcmp((*p)->name, name))
 912                 p = &((*p)->next);
 913         if ((setting = (*p)) == NULL)
 914                 return;
 915
 916         (*p) = setting->next;
 917
 918         kfree(setting->name);
 919         kfree(setting);
 920 }
 921
 922 /**
 923  *      ide_find_setting_by_ioctl       -       find a drive specific ioctl
 924  *      @drive: drive to scan
 925  *      @cmd: ioctl command to handle
 926  *
 927  *      Scan's the device setting table for a matching entry and returns
 928  *      this or NULL if no entry is found. The caller must hold the
 929  *      setting semaphore
 930  */
 931
 932 static ide_settings_t *ide_find_setting_by_ioctl (ide_drive_t *drive, int cmd)
 933 {
 934         ide_settings_t *setting = drive->settings;
 935
 936         while (setting) {
 937                 if (setting->read_ioctl == cmd || setting->write_ioctl == cmd)
 938                         break;
 939                 setting = setting->next;
 940         }
 941
 942         return setting;
 943 }
 944
 945 /**
 946  *      ide_find_setting_by_name        -       find a drive specific setting
 947  *      @drive: drive to scan
 948  *      @name: setting name
 949  *
 950  *      Scan's the device setting table for a matching entry and returns
 951  *      this or NULL if no entry is found. The caller must hold the
 952  *      setting semaphore
 953  */
 954
 955 ide_settings_t *ide_find_setting_by_name (ide_drive_t *drive, char *name)
 956 {
 957         ide_settings_t *setting = drive->settings;
 958
 959         while (setting) {
 960                 if (strcmp(setting->name, name) == 0)
 961                         break;
 962                 setting = setting->next;
 963         }
 964         return setting;
 965 }
 966
 967 /**
 968  *      auto_remove_settings    -       remove driver specific settings
 969  *      @drive: drive
 970  *
 971  *      Automatically remove all the driver specific settings for this
 972  *      drive. This function may sleep and must not be called from IRQ
 973  *      context. The caller must hold ide_setting_sem.
 974  */
 975
 976 static void auto_remove_settings (ide_drive_t *drive)
 977 {
 978         ide_settings_t *setting;
 979 repeat:
 980         setting = drive->settings;
 981         while (setting) {
 982                 if (setting->auto_remove) {
 983                         __ide_remove_setting(drive, setting->name);
 984                         goto repeat;
 985                 }
 986                 setting = setting->next;
 987         }
 988 }
 989
 990 /**
 991  *      ide_read_setting        -       read an IDE setting
 992  *      @drive: drive to read from
 993  *      @setting: drive setting
 994  *
 995  *      Read a drive setting and return the value. The caller
 996  *      must hold the ide_setting_sem when making this call.
 997  *
 998  *      BUGS: the data return and error are the same return value
 999  *      so an error -EINVAL and true return of the same value cannot
1000  *      be told apart
1001  */
1002
1003 int ide_read_setting (ide_drive_t *drive, ide_settings_t *setting)
1004 {
1005         int             val = -EINVAL;
1006         unsigned long   flags;
1007
1008         if ((setting->rw & SETTING_READ)) {
1009                 spin_lock_irqsave(&ide_lock, flags);
1010                 switch(setting->data_type) {
1011                         case TYPE_BYTE:
1012                                 val = *((u8 *) setting->data);
1013                                 break;
1014                         case TYPE_SHORT:
1015                                 val = *((u16 *) setting->data);
1016                                 break;
1017                         case TYPE_INT:
1018                         case TYPE_INTA:
1019                                 val = *((u32 *) setting->data);
1020                                 break;
1021                 }
1022                 spin_unlock_irqrestore(&ide_lock, flags);
1023         }
1024         return val;
1025 }
1026
1027 /**
1028  *      ide_spin_wait_hwgroup   -       wait for group
1029  *      @drive: drive in the group
1030  *
1031  *      Wait for an IDE device group to go non busy and then return
1032  *      holding the ide_lock which guards the hwgroup->busy status
1033  *      and right to use it.
1034  */
1035
1036 int ide_spin_wait_hwgroup (ide_drive_t *drive)
1037 {
1038         ide_hwgroup_t *hwgroup = HWGROUP(drive);
1039         unsigned long timeout = jiffies + (3 * HZ);
1040
1041         spin_lock_irq(&ide_lock);
1042
1043         while (hwgroup->busy) {
1044                 unsigned long lflags;
1045                 spin_unlock_irq(&ide_lock);
1046                 local_irq_set(lflags);
1047                 if (time_after(jiffies, timeout)) {
1048                         local_irq_restore(lflags);
1049                         printk(KERN_ERR "%s: channel busy\n", drive->name);
1050                         return -EBUSY;
1051                 }
1052                 local_irq_restore(lflags);
1053                 spin_lock_irq(&ide_lock);
1054         }
1055         return 0;
1056 }
1057
1058 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
1059
1060 /**
1061  *      ide_write_setting       -       read an IDE setting
1062  *      @drive: drive to read from
1063  *      @setting: drive setting
1064  *      @val: value
1065  *
1066  *      Write a drive setting if it is possible. The caller
1067  *      must hold the ide_setting_sem when making this call.
1068  *
1069  *      BUGS: the data return and error are the same return value
1070  *      so an error -EINVAL and true return of the same value cannot
1071  *      be told apart
1072  *
1073  *      FIXME:  This should be changed to enqueue a special request
1074  *      to the driver to change settings, and then wait on a sema for completion.
1075  *      The current scheme of polling is kludgy, though safe enough.
1076  */
1077
1078 int ide_write_setting (ide_drive_t *drive, ide_settings_t *setting, int val)
1079 {
1080         int i;
1081         u32 *p;
1082
1083         if (!capable(CAP_SYS_ADMIN))
1084                 return -EACCES;
1085         if (!(setting->rw & SETTING_WRITE))
1086                 return -EPERM;
1087         if (val < setting->min || val > setting->max)
1088                 return -EINVAL;
1089         if (setting->set)
1090                 return setting->set(drive, val);
1091         if (ide_spin_wait_hwgroup(drive))
1092                 return -EBUSY;
1093         switch (setting->data_type) {
1094                 case TYPE_BYTE:
1095                         *((u8 *) setting->data) = val;
1096                         break;
1097                 case TYPE_SHORT:
1098                         *((u16 *) setting->data) = val;
1099                         break;
1100                 case TYPE_INT:
1101                         *((u32 *) setting->data) = val;
1102                         break;
1103                 case TYPE_INTA:
1104                         p = (u32 *) setting->data;
1105                         for (i = 0; i < 1 << PARTN_BITS; i++, p++)
1106                                 *p = val;
1107                         break;
1108         }
1109         spin_unlock_irq(&ide_lock);
1110         return 0;
1111 }
1112
1113 static int set_io_32bit(ide_drive_t *drive, int arg)
1114 {
1115         drive->io_32bit = arg;
1116 #ifdef CONFIG_BLK_DEV_DTC2278
1117         if (HWIF(drive)->chipset == ide_dtc2278)
1118                 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
1119 #endif /* CONFIG_BLK_DEV_DTC2278 */
1120         return 0;
1121 }
1122
1123 static int set_using_dma (ide_drive_t *drive, int arg)
1124 {
1125 #ifdef CONFIG_BLK_DEV_IDEDMA
1126         if (!drive->id || !(drive->id->capability & 1))
1127                 return -EPERM;
1128         if (HWIF(drive)->ide_dma_check == NULL)
1129                 return -EPERM;
1130         if (arg) {
1131                 if (HWIF(drive)->ide_dma_check(drive)) return -EIO;
1132                 if (HWIF(drive)->ide_dma_on(drive)) return -EIO;
1133         } else {
1134                 if (__ide_dma_off(drive))
1135                         return -EIO;
1136         }
1137         return 0;
1138 #else
1139         return -EPERM;
1140 #endif
1141 }
1142
1143 static int set_pio_mode (ide_drive_t *drive, int arg)
1144 {
1145         struct request rq;
1146
1147         if (!HWIF(drive)->tuneproc)
1148                 return -ENOSYS;
1149         if (drive->special.b.set_tune)
1150                 return -EBUSY;
1151         ide_init_drive_cmd(&rq);
1152         drive->tune_req = (u8) arg;
1153         drive->special.b.set_tune = 1;
1154         (void) ide_do_drive_cmd(drive, &rq, ide_wait);
1155         return 0;
1156 }
1157
1158 static int set_xfer_rate (ide_drive_t *drive, int arg)
1159 {
1160         int err = ide_wait_cmd(drive,
1161                         WIN_SETFEATURES, (u8) arg,
1162                         SETFEATURES_XFER, 0, NULL);
1163
1164         if (!err && arg) {
1165                 ide_set_xfer_rate(drive, (u8) arg);
1166                 ide_driveid_update(drive);
1167         }
1168         return err;
1169 }
1170
1171 /**
1172  *      ide_add_generic_settings        -       generic ide settings
1173  *      @drive: drive being configured
1174  *
1175  *      Add the generic parts of the system settings to the /proc files and
1176  *      ioctls for this IDE device. The caller must not be holding the
1177  *      ide_setting_sem.
1178  */
1179
1180 void ide_add_generic_settings (ide_drive_t *drive)
1181 {
1182 /*
1183  *                        drive         setting name            read/write access                               read ioctl              write ioctl             data type       min     max                             mul_factor      div_factor      data pointer                    set function
1184  */
1185         __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);
1186         __ide_add_setting(drive,        "keepsettings",         SETTING_RW,                                     HDIO_GET_KEEPSETTINGS,  HDIO_SET_KEEPSETTINGS,  TYPE_BYTE,      0,      1,                              1,              1,              &drive->keep_settings,          NULL,           0);
1187         __ide_add_setting(drive,        "nice1",                SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->nice1,                  NULL,           0);
1188         __ide_add_setting(drive,        "pio_mode",             SETTING_WRITE,                                  -1,                     HDIO_SET_PIO_MODE,      TYPE_BYTE,      0,      255,                            1,              1,              NULL,                           set_pio_mode,   0);
1189         __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);
1190         __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);
1191         __ide_add_setting(drive,        "init_speed",           SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->init_speed,             NULL,           0);
1192         __ide_add_setting(drive,        "current_speed",        SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->current_speed,          set_xfer_rate,  0);
1193         __ide_add_setting(drive,        "number",               SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      3,                              1,              1,              &drive->dn,                     NULL,           0);
1194 }
1195
1196 /**
1197  *      system_bus_clock        -       clock guess
1198  *
1199  *      External version of the bus clock guess used by very old IDE drivers
1200  *      for things like VLB timings. Should not be used.
1201  */
1202
1203 int system_bus_clock (void)
1204 {
1205         return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
1206 }
1207
1208 EXPORT_SYMBOL(system_bus_clock);
1209
1210 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
1211 {
1212         ide_drive_t *drive = dev->driver_data;
1213         struct request rq;
1214         struct request_pm_state rqpm;
1215         ide_task_t args;
1216
1217         memset(&rq, 0, sizeof(rq));
1218         memset(&rqpm, 0, sizeof(rqpm));
1219         memset(&args, 0, sizeof(args));
1220         rq.cmd_type = REQ_TYPE_PM_SUSPEND;
1221         rq.special = &args;
1222         rq.data = &rqpm;
1223         rqpm.pm_step = ide_pm_state_start_suspend;
1224         if (mesg.event == PM_EVENT_PRETHAW)
1225                 mesg.event = PM_EVENT_FREEZE;
1226         rqpm.pm_state = mesg.event;
1227
1228         return ide_do_drive_cmd(drive, &rq, ide_wait);
1229 }
1230
1231 static int generic_ide_resume(struct device *dev)
1232 {
1233         ide_drive_t *drive = dev->driver_data;
1234         struct request rq;
1235         struct request_pm_state rqpm;
1236         ide_task_t args;
1237
1238         memset(&rq, 0, sizeof(rq));
1239         memset(&rqpm, 0, sizeof(rqpm));
1240         memset(&args, 0, sizeof(args));
1241         rq.cmd_type = REQ_TYPE_PM_RESUME;
1242         rq.special = &args;
1243         rq.data = &rqpm;
1244         rqpm.pm_step = ide_pm_state_start_resume;
1245         rqpm.pm_state = PM_EVENT_ON;
1246
1247         return ide_do_drive_cmd(drive, &rq, ide_head_wait);
1248 }
1249
1250 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
1251                         unsigned int cmd, unsigned long arg)
1252 {
1253         ide_settings_t *setting;
1254         ide_driver_t *drv;
1255         int err = 0;
1256         void __user *p = (void __user *)arg;
1257
1258         down(&ide_setting_sem);
1259         if ((setting = ide_find_setting_by_ioctl(drive, cmd)) != NULL) {
1260                 if (cmd == setting->read_ioctl) {
1261                         err = ide_read_setting(drive, setting);
1262                         up(&ide_setting_sem);
1263                         return err >= 0 ? put_user(err, (long __user *)arg) : err;
1264                 } else {
1265                         if (bdev != bdev->bd_contains)
1266                                 err = -EINVAL;
1267                         else
1268                                 err = ide_write_setting(drive, setting, arg);
1269                         up(&ide_setting_sem);
1270                         return err;
1271                 }
1272         }
1273         up(&ide_setting_sem);
1274
1275         switch (cmd) {
1276                 case HDIO_OBSOLETE_IDENTITY:
1277                 case HDIO_GET_IDENTITY:
1278                         if (bdev != bdev->bd_contains)
1279                                 return -EINVAL;
1280                         if (drive->id_read == 0)
1281                                 return -ENOMSG;
1282                         if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1283                                 return -EFAULT;
1284                         return 0;
1285
1286                 case HDIO_GET_NICE:
1287                         return put_user(drive->dsc_overlap      <<      IDE_NICE_DSC_OVERLAP    |
1288                                         drive->atapi_overlap    <<      IDE_NICE_ATAPI_OVERLAP  |
1289                                         drive->nice0            <<      IDE_NICE_0              |
1290                                         drive->nice1            <<      IDE_NICE_1              |
1291                                         drive->nice2            <<      IDE_NICE_2,
1292                                         (long __user *) arg);
1293
1294 #ifdef CONFIG_IDE_TASK_IOCTL
1295                 case HDIO_DRIVE_TASKFILE:
1296                         if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1297                                 return -EACCES;
1298                         switch(drive->media) {
1299                                 case ide_disk:
1300                                         return ide_taskfile_ioctl(drive, cmd, arg);
1301                                 default:
1302                                         return -ENOMSG;
1303                         }
1304 #endif /* CONFIG_IDE_TASK_IOCTL */
1305
1306                 case HDIO_DRIVE_CMD:
1307                         if (!capable(CAP_SYS_RAWIO))
1308                                 return -EACCES;
1309                         return ide_cmd_ioctl(drive, cmd, arg);
1310
1311                 case HDIO_DRIVE_TASK:
1312                         if (!capable(CAP_SYS_RAWIO))
1313                                 return -EACCES;
1314                         return ide_task_ioctl(drive, cmd, arg);
1315
1316                 case HDIO_SCAN_HWIF:
1317                 {
1318                         hw_regs_t hw;
1319                         int args[3];
1320                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1321                         if (copy_from_user(args, p, 3 * sizeof(int)))
1322                                 return -EFAULT;
1323                         memset(&hw, 0, sizeof(hw));
1324                         ide_init_hwif_ports(&hw, (unsigned long) args[0],
1325                                             (unsigned long) args[1], NULL);
1326                         hw.irq = args[2];
1327                         if (ide_register_hw(&hw, NULL) == -1)
1328                                 return -EIO;
1329                         return 0;
1330                 }
1331                 case HDIO_UNREGISTER_HWIF:
1332                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1333                         /* (arg > MAX_HWIFS) checked in function */
1334                         ide_unregister(arg);
1335                         return 0;
1336                 case HDIO_SET_NICE:
1337                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1338                         if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1339                                 return -EPERM;
1340                         drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1341                         drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1342                         if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1343                                 drive->dsc_overlap = 0;
1344                                 return -EPERM;
1345                         }
1346                         drive->nice1 = (arg >> IDE_NICE_1) & 1;
1347                         return 0;
1348                 case HDIO_DRIVE_RESET:
1349                 {
1350                         unsigned long flags;
1351                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1352
1353                         /*
1354                          *      Abort the current command on the
1355                          *      group if there is one, taking
1356                          *      care not to allow anything else
1357                          *      to be queued and to die on the
1358                          *      spot if we miss one somehow
1359                          */
1360
1361                         spin_lock_irqsave(&ide_lock, flags);
1362
1363                         ide_abort(drive, "drive reset");
1364
1365                         BUG_ON(HWGROUP(drive)->handler);
1366
1367                         /* Ensure nothing gets queued after we
1368                            drop the lock. Reset will clear the busy */
1369
1370                         HWGROUP(drive)->busy = 1;
1371                         spin_unlock_irqrestore(&ide_lock, flags);
1372                         (void) ide_do_reset(drive);
1373
1374                         return 0;
1375                 }
1376
1377                 case CDROMEJECT:
1378                 case CDROMCLOSETRAY:
1379                         return scsi_cmd_ioctl(file, bdev->bd_disk, cmd, p);
1380
1381                 case HDIO_GET_BUSSTATE:
1382                         if (!capable(CAP_SYS_ADMIN))
1383                                 return -EACCES;
1384                         if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1385                                 return -EFAULT;
1386                         return 0;
1387
1388                 case HDIO_SET_BUSSTATE:
1389                         if (!capable(CAP_SYS_ADMIN))
1390                                 return -EACCES;
1391                         if (HWIF(drive)->busproc)
1392                                 return HWIF(drive)->busproc(drive, (int)arg);
1393                         return -EOPNOTSUPP;
1394                 default:
1395                         return -EINVAL;
1396         }
1397 }
1398
1399 EXPORT_SYMBOL(generic_ide_ioctl);
1400
1401 /*
1402  * stridx() returns the offset of c within s,
1403  * or -1 if c is '\0' or not found within s.
1404  */
1405 static int __init stridx (const char *s, char c)
1406 {
1407         char *i = strchr(s, c);
1408         return (i && c) ? i - s : -1;
1409 }
1410
1411 /*
1412  * match_parm() does parsing for ide_setup():
1413  *
1414  * 1. the first char of s must be '='.
1415  * 2. if the remainder matches one of the supplied keywords,
1416  *     the index (1 based) of the keyword is negated and returned.
1417  * 3. if the remainder is a series of no more than max_vals numbers
1418  *     separated by commas, the numbers are saved in vals[] and a
1419  *     count of how many were saved is returned.  Base10 is assumed,
1420  *     and base16 is allowed when prefixed with "0x".
1421  * 4. otherwise, zero is returned.
1422  */
1423 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1424 {
1425         static const char *decimal = "0123456789";
1426         static const char *hex = "0123456789abcdef";
1427         int i, n;
1428
1429         if (*s++ == '=') {
1430                 /*
1431                  * Try matching against the supplied keywords,
1432                  * and return -(index+1) if we match one
1433                  */
1434                 if (keywords != NULL) {
1435                         for (i = 0; *keywords != NULL; ++i) {
1436                                 if (!strcmp(s, *keywords++))
1437                                         return -(i+1);
1438                         }
1439                 }
1440                 /*
1441                  * Look for a series of no more than "max_vals"
1442                  * numeric values separated by commas, in base10,
1443                  * or base16 when prefixed with "0x".
1444                  * Return a count of how many were found.
1445                  */
1446                 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1447                         vals[n] = i;
1448                         while ((i = stridx(decimal, *++s)) >= 0)
1449                                 vals[n] = (vals[n] * 10) + i;
1450                         if (*s == 'x' && !vals[n]) {
1451                                 while ((i = stridx(hex, *++s)) >= 0)
1452                                         vals[n] = (vals[n] * 0x10) + i;
1453                         }
1454                         if (++n == max_vals)
1455                                 break;
1456                         if (*s == ',' || *s == ';')
1457                                 ++s;
1458                 }
1459                 if (!*s)
1460                         return n;
1461         }
1462         return 0;       /* zero = nothing matched */
1463 }
1464
1465 #ifdef CONFIG_BLK_DEV_ALI14XX
1466 static int __initdata probe_ali14xx;
1467 extern int ali14xx_init(void);
1468 #endif
1469 #ifdef CONFIG_BLK_DEV_UMC8672
1470 static int __initdata probe_umc8672;
1471 extern int umc8672_init(void);
1472 #endif
1473 #ifdef CONFIG_BLK_DEV_DTC2278
1474 static int __initdata probe_dtc2278;
1475 extern int dtc2278_init(void);
1476 #endif
1477 #ifdef CONFIG_BLK_DEV_HT6560B
1478 static int __initdata probe_ht6560b;
1479 extern int ht6560b_init(void);
1480 #endif
1481 #ifdef CONFIG_BLK_DEV_QD65XX
1482 static int __initdata probe_qd65xx;
1483 extern int qd65xx_init(void);
1484 #endif
1485
1486 static int __initdata is_chipset_set[MAX_HWIFS];
1487
1488 /*
1489  * ide_setup() gets called VERY EARLY during initialization,
1490  * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1491  *
1492  * Remember to update Documentation/ide.txt if you change something here.
1493  */
1494 static int __init ide_setup(char *s)
1495 {
1496         int i, vals[3];
1497         ide_hwif_t *hwif;
1498         ide_drive_t *drive;
1499         unsigned int hw, unit;
1500         const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1501         const char max_hwif  = '0' + (MAX_HWIFS - 1);
1502
1503
1504         if (strncmp(s,"hd",2) == 0 && s[2] == '=')      /* hd= is for hd.c   */
1505                 return 0;                               /* driver and not us */
1506
1507         if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1508                 return 0;
1509
1510         printk(KERN_INFO "ide_setup: %s", s);
1511         init_ide_data ();
1512
1513 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1514         if (!strcmp(s, "ide=doubler")) {
1515                 extern int ide_doubler;
1516
1517                 printk(" : Enabled support for IDE doublers\n");
1518                 ide_doubler = 1;
1519                 return 1;
1520         }
1521 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1522
1523         if (!strcmp(s, "ide=nodma")) {
1524                 printk(" : Prevented DMA\n");
1525                 noautodma = 1;
1526                 return 1;
1527         }
1528
1529 #ifdef CONFIG_BLK_DEV_IDEPCI
1530         if (!strcmp(s, "ide=reverse")) {
1531                 ide_scan_direction = 1;
1532                 printk(" : Enabled support for IDE inverse scan order.\n");
1533                 return 1;
1534         }
1535 #endif /* CONFIG_BLK_DEV_IDEPCI */
1536
1537         /*
1538          * Look for drive options:  "hdx="
1539          */
1540         if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1541                 const char *hd_words[] = {
1542                         "none", "noprobe", "nowerr", "cdrom", "serialize",
1543                         "autotune", "noautotune", "minus8", "swapdata", "bswap",
1544                         "noflush", "remap", "remap63", "scsi", NULL };
1545                 unit = s[2] - 'a';
1546                 hw   = unit / MAX_DRIVES;
1547                 unit = unit % MAX_DRIVES;
1548                 hwif = &ide_hwifs[hw];
1549                 drive = &hwif->drives[unit];
1550                 if (strncmp(s + 4, "ide-", 4) == 0) {
1551                         strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1552                         goto done;
1553                 }
1554                 switch (match_parm(&s[3], hd_words, vals, 3)) {
1555                         case -1: /* "none" */
1556                         case -2: /* "noprobe" */
1557                                 drive->noprobe = 1;
1558                                 goto done;
1559                         case -3: /* "nowerr" */
1560                                 drive->bad_wstat = BAD_R_STAT;
1561                                 hwif->noprobe = 0;
1562                                 goto done;
1563                         case -4: /* "cdrom" */
1564                                 drive->present = 1;
1565                                 drive->media = ide_cdrom;
1566                                 /* an ATAPI device ignores DRDY */
1567                                 drive->ready_stat = 0;
1568                                 hwif->noprobe = 0;
1569                                 goto done;
1570                         case -5: /* "serialize" */
1571                                 printk(" -- USE \"ide%d=serialize\" INSTEAD", hw);
1572                                 goto do_serialize;
1573                         case -6: /* "autotune" */
1574                                 drive->autotune = IDE_TUNE_AUTO;
1575                                 goto obsolete_option;
1576                         case -7: /* "noautotune" */
1577                                 drive->autotune = IDE_TUNE_NOAUTO;
1578                                 goto obsolete_option;
1579                         case -9: /* "swapdata" */
1580                         case -10: /* "bswap" */
1581                                 drive->bswap = 1;
1582                                 goto done;
1583                         case -11: /* noflush */
1584                                 drive->noflush = 1;
1585                                 goto done;
1586                         case -12: /* "remap" */
1587                                 drive->remap_0_to_1 = 1;
1588                                 goto done;
1589                         case -13: /* "remap63" */
1590                                 drive->sect0 = 63;
1591                                 goto done;
1592                         case -14: /* "scsi" */
1593                                 drive->scsi = 1;
1594                                 goto done;
1595                         case 3: /* cyl,head,sect */
1596                                 drive->media    = ide_disk;
1597                                 drive->ready_stat = READY_STAT;
1598                                 drive->cyl      = drive->bios_cyl  = vals[0];
1599                                 drive->head     = drive->bios_head = vals[1];
1600                                 drive->sect     = drive->bios_sect = vals[2];
1601                                 drive->present  = 1;
1602                                 drive->forced_geom = 1;
1603                                 hwif->noprobe = 0;
1604                                 goto done;
1605                         default:
1606                                 goto bad_option;
1607                 }
1608         }
1609
1610         if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1611                 goto bad_option;
1612         /*
1613          * Look for bus speed option:  "idebus="
1614          */
1615         if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1616                 if (match_parm(&s[6], NULL, vals, 1) != 1)
1617                         goto bad_option;
1618                 if (vals[0] >= 20 && vals[0] <= 66) {
1619                         idebus_parameter = vals[0];
1620                 } else
1621                         printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1622                 goto done;
1623         }
1624         /*
1625          * Look for interface options:  "idex="
1626          */
1627         if (s[3] >= '0' && s[3] <= max_hwif) {
1628                 /*
1629                  * Be VERY CAREFUL changing this: note hardcoded indexes below
1630                  * (-8, -9, -10) are reserved to ease the hardcoding.
1631                  */
1632                 static const char *ide_words[] = {
1633                         "noprobe", "serialize", "autotune", "noautotune",
1634                         "reset", "dma", "ata66", "minus8", "minus9",
1635                         "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1636                         "dtc2278", "umc8672", "ali14xx", NULL };
1637                 hw = s[3] - '0';
1638                 hwif = &ide_hwifs[hw];
1639                 i = match_parm(&s[4], ide_words, vals, 3);
1640
1641                 /*
1642                  * Cryptic check to ensure chipset not already set for hwif.
1643                  * Note: we can't depend on hwif->chipset here.
1644                  */
1645                 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1646                         /* chipset already specified */
1647                         if (is_chipset_set[hw])
1648                                 goto bad_option;
1649                         if (i > -18 && i <= -11) {
1650                                 /* these drivers are for "ide0=" only */
1651                                 if (hw != 0)
1652                                         goto bad_hwif;
1653                                 /* chipset already specified for 2nd port */
1654                                 if (is_chipset_set[hw+1])
1655                                         goto bad_option;
1656                         }
1657                         is_chipset_set[hw] = 1;
1658                         printk("\n");
1659                 }
1660
1661                 switch (i) {
1662 #ifdef CONFIG_BLK_DEV_ALI14XX
1663                         case -17: /* "ali14xx" */
1664                                 probe_ali14xx = 1;
1665                                 goto done;
1666 #endif
1667 #ifdef CONFIG_BLK_DEV_UMC8672
1668                         case -16: /* "umc8672" */
1669                                 probe_umc8672 = 1;
1670                                 goto done;
1671 #endif
1672 #ifdef CONFIG_BLK_DEV_DTC2278
1673                         case -15: /* "dtc2278" */
1674                                 probe_dtc2278 = 1;
1675                                 goto done;
1676 #endif
1677 #ifdef CONFIG_BLK_DEV_CMD640
1678                         case -14: /* "cmd640_vlb" */
1679                         {
1680                                 extern int cmd640_vlb; /* flag for cmd640.c */
1681                                 cmd640_vlb = 1;
1682                                 goto done;
1683                         }
1684 #endif
1685 #ifdef CONFIG_BLK_DEV_HT6560B
1686                         case -13: /* "ht6560b" */
1687                                 probe_ht6560b = 1;
1688                                 goto done;
1689 #endif
1690 #ifdef CONFIG_BLK_DEV_QD65XX
1691                         case -12: /* "qd65xx" */
1692                                 probe_qd65xx = 1;
1693                                 goto done;
1694 #endif
1695 #ifdef CONFIG_BLK_DEV_4DRIVES
1696                         case -11: /* "four" drives on one set of ports */
1697                         {
1698                                 ide_hwif_t *mate = &ide_hwifs[hw^1];
1699                                 mate->drives[0].select.all ^= 0x20;
1700                                 mate->drives[1].select.all ^= 0x20;
1701                                 hwif->chipset = mate->chipset = ide_4drives;
1702                                 mate->irq = hwif->irq;
1703                                 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1704                                 goto do_serialize;
1705                         }
1706 #endif /* CONFIG_BLK_DEV_4DRIVES */
1707                         case -10: /* minus10 */
1708                         case -9: /* minus9 */
1709                         case -8: /* minus8 */
1710                                 goto bad_option;
1711                         case -7: /* ata66 */
1712 #ifdef CONFIG_BLK_DEV_IDEPCI
1713                                 hwif->udma_four = 1;
1714                                 goto obsolete_option;
1715 #else
1716                                 goto bad_hwif;
1717 #endif
1718                         case -6: /* dma */
1719                                 hwif->autodma = 1;
1720                                 goto obsolete_option;
1721                         case -5: /* "reset" */
1722                                 hwif->reset = 1;
1723                                 goto obsolete_option;
1724                         case -4: /* "noautotune" */
1725                                 hwif->drives[0].autotune = IDE_TUNE_NOAUTO;
1726                                 hwif->drives[1].autotune = IDE_TUNE_NOAUTO;
1727                                 goto obsolete_option;
1728                         case -3: /* "autotune" */
1729                                 hwif->drives[0].autotune = IDE_TUNE_AUTO;
1730                                 hwif->drives[1].autotune = IDE_TUNE_AUTO;
1731                                 goto obsolete_option;
1732                         case -2: /* "serialize" */
1733                         do_serialize:
1734                                 hwif->mate = &ide_hwifs[hw^1];
1735                                 hwif->mate->mate = hwif;
1736                                 hwif->serialized = hwif->mate->serialized = 1;
1737                                 goto obsolete_option;
1738
1739                         case -1: /* "noprobe" */
1740                                 hwif->noprobe = 1;
1741                                 goto done;
1742
1743                         case 1: /* base */
1744                                 vals[1] = vals[0] + 0x206; /* default ctl */
1745                         case 2: /* base,ctl */
1746                                 vals[2] = 0;    /* default irq = probe for it */
1747                         case 3: /* base,ctl,irq */
1748                                 hwif->hw.irq = vals[2];
1749                                 ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq);
1750                                 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
1751                                 hwif->irq      = vals[2];
1752                                 hwif->noprobe  = 0;
1753                                 hwif->chipset  = ide_forced;
1754                                 goto obsolete_option;
1755
1756                         case 0: goto bad_option;
1757                         default:
1758                                 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1759                                 return 1;
1760                 }
1761         }
1762 bad_option:
1763         printk(" -- BAD OPTION\n");
1764         return 1;
1765 obsolete_option:
1766         printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1767         return 1;
1768 bad_hwif:
1769         printk("-- NOT SUPPORTED ON ide%d", hw);
1770 done:
1771         printk("\n");
1772         return 1;
1773 }
1774
1775 extern void pnpide_init(void);
1776 extern void h8300_ide_init(void);
1777
1778 /*
1779  * probe_for_hwifs() finds/initializes "known" IDE interfaces
1780  */
1781 static void __init probe_for_hwifs (void)
1782 {
1783 #ifdef CONFIG_BLK_DEV_IDEPCI
1784         ide_scan_pcibus(ide_scan_direction);
1785 #endif /* CONFIG_BLK_DEV_IDEPCI */
1786
1787 #ifdef CONFIG_ETRAX_IDE
1788         {
1789                 extern void init_e100_ide(void);
1790                 init_e100_ide();
1791         }
1792 #endif /* CONFIG_ETRAX_IDE */
1793 #ifdef CONFIG_BLK_DEV_CMD640
1794         {
1795                 extern void ide_probe_for_cmd640x(void);
1796                 ide_probe_for_cmd640x();
1797         }
1798 #endif /* CONFIG_BLK_DEV_CMD640 */
1799 #ifdef CONFIG_BLK_DEV_IDE_PMAC
1800         {
1801                 extern void pmac_ide_probe(void);
1802                 pmac_ide_probe();
1803         }
1804 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
1805 #ifdef CONFIG_BLK_DEV_GAYLE
1806         {
1807                 extern void gayle_init(void);
1808                 gayle_init();
1809         }
1810 #endif /* CONFIG_BLK_DEV_GAYLE */
1811 #ifdef CONFIG_BLK_DEV_FALCON_IDE
1812         {
1813                 extern void falconide_init(void);
1814                 falconide_init();
1815         }
1816 #endif /* CONFIG_BLK_DEV_FALCON_IDE */
1817 #ifdef CONFIG_BLK_DEV_MAC_IDE
1818         {
1819                 extern void macide_init(void);
1820                 macide_init();
1821         }
1822 #endif /* CONFIG_BLK_DEV_MAC_IDE */
1823 #ifdef CONFIG_BLK_DEV_Q40IDE
1824         {
1825                 extern void q40ide_init(void);
1826                 q40ide_init();
1827         }
1828 #endif /* CONFIG_BLK_DEV_Q40IDE */
1829 #ifdef CONFIG_BLK_DEV_BUDDHA
1830         {
1831                 extern void buddha_init(void);
1832                 buddha_init();
1833         }
1834 #endif /* CONFIG_BLK_DEV_BUDDHA */
1835 #ifdef CONFIG_BLK_DEV_IDEPNP
1836         pnpide_init();
1837 #endif
1838 #ifdef CONFIG_H8300
1839         h8300_ide_init();
1840 #endif
1841 }
1842
1843 void ide_register_subdriver(ide_drive_t *drive, ide_driver_t *driver)
1844 {
1845 #ifdef CONFIG_PROC_FS
1846         ide_add_proc_entries(drive->proc, driver->proc, drive);
1847 #endif
1848 }
1849
1850 EXPORT_SYMBOL(ide_register_subdriver);
1851
1852 /**
1853  *      ide_unregister_subdriver        -       disconnect drive from driver
1854  *      @drive: drive to unplug
1855  *      @driver: driver
1856  *
1857  *      Disconnect a drive from the driver it was attached to and then
1858  *      clean up the various proc files and other objects attached to it.
1859  *
1860  *      Takes ide_setting_sem and ide_lock.
1861  *      Caller must hold none of the locks.
1862  */
1863
1864 void ide_unregister_subdriver(ide_drive_t *drive, ide_driver_t *driver)
1865 {
1866         unsigned long flags;
1867
1868         down(&ide_setting_sem);
1869         spin_lock_irqsave(&ide_lock, flags);
1870 #ifdef CONFIG_PROC_FS
1871         ide_remove_proc_entries(drive->proc, driver->proc);
1872 #endif
1873         auto_remove_settings(drive);
1874         spin_unlock_irqrestore(&ide_lock, flags);
1875         up(&ide_setting_sem);
1876 }
1877
1878 EXPORT_SYMBOL(ide_unregister_subdriver);
1879
1880 /*
1881  * Probe module
1882  */
1883
1884 EXPORT_SYMBOL(ide_lock);
1885
1886 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1887 {
1888         return 1;
1889 }
1890
1891 static char *media_string(ide_drive_t *drive)
1892 {
1893         switch (drive->media) {
1894         case ide_disk:
1895                 return "disk";
1896         case ide_cdrom:
1897                 return "cdrom";
1898         case ide_tape:
1899                 return "tape";
1900         case ide_floppy:
1901                 return "floppy";
1902         default:
1903                 return "UNKNOWN";
1904         }
1905 }
1906
1907 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1908 {
1909         ide_drive_t *drive = to_ide_device(dev);
1910         return sprintf(buf, "%s\n", media_string(drive));
1911 }
1912
1913 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1914 {
1915         ide_drive_t *drive = to_ide_device(dev);
1916         return sprintf(buf, "%s\n", drive->name);
1917 }
1918
1919 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1920 {
1921         ide_drive_t *drive = to_ide_device(dev);
1922         return sprintf(buf, "ide:m-%s\n", media_string(drive));
1923 }
1924
1925 static struct device_attribute ide_dev_attrs[] = {
1926         __ATTR_RO(media),
1927         __ATTR_RO(drivename),
1928         __ATTR_RO(modalias),
1929         __ATTR_NULL
1930 };
1931
1932 static int ide_uevent(struct device *dev, char **envp, int num_envp,
1933                       char *buffer, int buffer_size)
1934 {
1935         ide_drive_t *drive = to_ide_device(dev);
1936         int i = 0;
1937         int length = 0;
1938
1939         add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1940                        "MEDIA=%s", media_string(drive));
1941         add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1942                        "DRIVENAME=%s", drive->name);
1943         add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1944                        "MODALIAS=ide:m-%s", media_string(drive));
1945         envp[i] = NULL;
1946         return 0;
1947 }
1948
1949 static int generic_ide_probe(struct device *dev)
1950 {
1951         ide_drive_t *drive = to_ide_device(dev);
1952         ide_driver_t *drv = to_ide_driver(dev->driver);
1953
1954         return drv->probe ? drv->probe(drive) : -ENODEV;
1955 }
1956
1957 static int generic_ide_remove(struct device *dev)
1958 {
1959         ide_drive_t *drive = to_ide_device(dev);
1960         ide_driver_t *drv = to_ide_driver(dev->driver);
1961
1962         if (drv->remove)
1963                 drv->remove(drive);
1964
1965         return 0;
1966 }
1967
1968 static void generic_ide_shutdown(struct device *dev)
1969 {
1970         ide_drive_t *drive = to_ide_device(dev);
1971         ide_driver_t *drv = to_ide_driver(dev->driver);
1972
1973         if (dev->driver && drv->shutdown)
1974                 drv->shutdown(drive);
1975 }
1976
1977 struct bus_type ide_bus_type = {
1978         .name           = "ide",
1979         .match          = ide_bus_match,
1980         .uevent         = ide_uevent,
1981         .probe          = generic_ide_probe,
1982         .remove         = generic_ide_remove,
1983         .shutdown       = generic_ide_shutdown,
1984         .dev_attrs      = ide_dev_attrs,
1985         .suspend        = generic_ide_suspend,
1986         .resume         = generic_ide_resume,
1987 };
1988
1989 EXPORT_SYMBOL_GPL(ide_bus_type);
1990
1991 /*
1992  * This is gets invoked once during initialization, to set *everything* up
1993  */
1994 static int __init ide_init(void)
1995 {
1996         printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
1997         system_bus_speed = ide_system_bus_speed();
1998
1999         bus_register(&ide_bus_type);
2000
2001         init_ide_data();
2002
2003 #ifdef CONFIG_PROC_FS
2004         proc_ide_root = proc_mkdir("ide", NULL);
2005 #endif
2006
2007 #ifdef CONFIG_BLK_DEV_ALI14XX
2008         if (probe_ali14xx)
2009                 (void)ali14xx_init();
2010 #endif
2011 #ifdef CONFIG_BLK_DEV_UMC8672
2012         if (probe_umc8672)
2013                 (void)umc8672_init();
2014 #endif
2015 #ifdef CONFIG_BLK_DEV_DTC2278
2016         if (probe_dtc2278)
2017                 (void)dtc2278_init();
2018 #endif
2019 #ifdef CONFIG_BLK_DEV_HT6560B
2020         if (probe_ht6560b)
2021                 (void)ht6560b_init();
2022 #endif
2023 #ifdef CONFIG_BLK_DEV_QD65XX
2024         if (probe_qd65xx)
2025                 (void)qd65xx_init();
2026 #endif
2027
2028         initializing = 1;
2029         /* Probe for special PCI and other "known" interface chipsets. */
2030         probe_for_hwifs();
2031         initializing = 0;
2032
2033 #ifdef CONFIG_PROC_FS
2034         proc_ide_create();
2035 #endif
2036         return 0;
2037 }
2038
2039 #ifdef MODULE
2040 static char *options = NULL;
2041 module_param(options, charp, 0);
2042 MODULE_LICENSE("GPL");
2043
2044 static void __init parse_options (char *line)
2045 {
2046         char *next = line;
2047
2048         if (line == NULL || !*line)
2049                 return;
2050         while ((line = next) != NULL) {
2051                 if ((next = strchr(line,' ')) != NULL)
2052                         *next++ = 0;
2053                 if (!ide_setup(line))
2054                         printk (KERN_INFO "Unknown option '%s'\n", line);
2055         }
2056 }
2057
2058 int __init init_module (void)
2059 {
2060         parse_options(options);
2061         return ide_init();
2062 }
2063
2064 void cleanup_module (void)
2065 {
2066         int index;
2067
2068         for (index = 0; index < MAX_HWIFS; ++index)
2069                 ide_unregister(index);
2070
2071 #ifdef CONFIG_PROC_FS
2072         proc_ide_destroy();
2073 #endif
2074
2075         bus_unregister(&ide_bus_type);
2076 }
2077
2078 #else /* !MODULE */
2079
2080 __setup("", ide_setup);
2081
2082 module_init(ide_init);
2083
2084 #endif /* MODULE */