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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 settings
 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->config_data               = tmp_hwif->config_data;
 543         hwif->select_data               = tmp_hwif->select_data;
 544         hwif->extra_base                = tmp_hwif->extra_base;
 545         hwif->extra_ports               = tmp_hwif->extra_ports;
 546         hwif->autodma                   = tmp_hwif->autodma;
 547         hwif->udma_four                 = tmp_hwif->udma_four;
 548         hwif->no_dsc                    = tmp_hwif->no_dsc;
 549
 550         hwif->hwif_data                 = tmp_hwif->hwif_data;
 551 }
 552
 553 /**
 554  *      ide_unregister          -       free an IDE interface
 555  *      @index: index of interface (will change soon to a pointer)
 556  *
 557  *      Perform the final unregister of an IDE interface. At the moment
 558  *      we don't refcount interfaces so this will also get split up.
 559  *
 560  *      Locking:
 561  *      The caller must not hold the IDE locks
 562  *      The drive present/vanishing is not yet properly locked
 563  *      Take care with the callbacks. These have been split to avoid
 564  *      deadlocking the IDE layer. The shutdown callback is called
 565  *      before we take the lock and free resources. It is up to the
 566  *      caller to be sure there is no pending I/O here, and that
 567  *      the interface will not be reopened (present/vanishing locking
 568  *      isn't yet done BTW). After we commit to the final kill we
 569  *      call the cleanup callback with the ide locks held.
 570  *
 571  *      Unregister restores the hwif structures to the default state.
 572  *      This is raving bonkers.
 573  */
 574
 575 void ide_unregister(unsigned int index)
 576 {
 577         ide_drive_t *drive;
 578         ide_hwif_t *hwif, *g;
 579         static ide_hwif_t tmp_hwif; /* protected by ide_cfg_sem */
 580         ide_hwgroup_t *hwgroup;
 581         int irq_count = 0, unit;
 582
 583         BUG_ON(index >= MAX_HWIFS);
 584
 585         BUG_ON(in_interrupt());
 586         BUG_ON(irqs_disabled());
 587         down(&ide_cfg_sem);
 588         spin_lock_irq(&ide_lock);
 589         hwif = &ide_hwifs[index];
 590         if (!hwif->present)
 591                 goto abort;
 592         for (unit = 0; unit < MAX_DRIVES; ++unit) {
 593                 drive = &hwif->drives[unit];
 594                 if (!drive->present)
 595                         continue;
 596                 spin_unlock_irq(&ide_lock);
 597                 device_unregister(&drive->gendev);
 598                 wait_for_completion(&drive->gendev_rel_comp);
 599                 spin_lock_irq(&ide_lock);
 600         }
 601         hwif->present = 0;
 602
 603         spin_unlock_irq(&ide_lock);
 604
 605         destroy_proc_ide_interface(hwif);
 606
 607         hwgroup = hwif->hwgroup;
 608         /*
 609          * free the irq if we were the only hwif using it
 610          */
 611         g = hwgroup->hwif;
 612         do {
 613                 if (g->irq == hwif->irq)
 614                         ++irq_count;
 615                 g = g->next;
 616         } while (g != hwgroup->hwif);
 617         if (irq_count == 1)
 618                 free_irq(hwif->irq, hwgroup);
 619
 620         spin_lock_irq(&ide_lock);
 621         /*
 622          * Note that we only release the standard ports,
 623          * and do not even try to handle any extra ports
 624          * allocated for weird IDE interface chipsets.
 625          */
 626         ide_hwif_release_regions(hwif);
 627
 628         /*
 629          * Remove us from the hwgroup, and free
 630          * the hwgroup if we were the only member
 631          */
 632         if (hwif->next == hwif) {
 633                 BUG_ON(hwgroup->hwif != hwif);
 634                 kfree(hwgroup);
 635         } else {
 636                 /* There is another interface in hwgroup.
 637                  * Unlink us, and set hwgroup->drive and ->hwif to
 638                  * something sane.
 639                  */
 640                 g = hwgroup->hwif;
 641                 while (g->next != hwif)
 642                         g = g->next;
 643                 g->next = hwif->next;
 644                 if (hwgroup->hwif == hwif) {
 645                         /* Chose a random hwif for hwgroup->hwif.
 646                          * It's guaranteed that there are no drives
 647                          * left in the hwgroup.
 648                          */
 649                         BUG_ON(hwgroup->drive != NULL);
 650                         hwgroup->hwif = g;
 651                 }
 652                 BUG_ON(hwgroup->hwif == hwif);
 653         }
 654
 655         /* More messed up locking ... */
 656         spin_unlock_irq(&ide_lock);
 657         device_unregister(&hwif->gendev);
 658         wait_for_completion(&hwif->gendev_rel_comp);
 659
 660         /*
 661          * Remove us from the kernel's knowledge
 662          */
 663         blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
 664         kfree(hwif->sg_table);
 665         unregister_blkdev(hwif->major, hwif->name);
 666         spin_lock_irq(&ide_lock);
 667
 668         if (hwif->dma_base) {
 669                 (void) ide_release_dma(hwif);
 670
 671                 hwif->dma_base = 0;
 672                 hwif->dma_master = 0;
 673                 hwif->dma_command = 0;
 674                 hwif->dma_vendor1 = 0;
 675                 hwif->dma_status = 0;
 676                 hwif->dma_vendor3 = 0;
 677                 hwif->dma_prdtable = 0;
 678
 679                 hwif->extra_base  = 0;
 680                 hwif->extra_ports = 0;
 681         }
 682
 683         /* copy original settings */
 684         tmp_hwif = *hwif;
 685
 686         /* restore hwif data to pristine status */
 687         init_hwif_data(hwif, index);
 688         init_hwif_default(hwif, index);
 689
 690         ide_hwif_restore(hwif, &tmp_hwif);
 691
 692 abort:
 693         spin_unlock_irq(&ide_lock);
 694         up(&ide_cfg_sem);
 695 }
 696
 697 EXPORT_SYMBOL(ide_unregister);
 698
 699
 700 /**
 701  *      ide_setup_ports         -       set up IDE interface ports
 702  *      @hw: register descriptions
 703  *      @base: base register
 704  *      @offsets: table of register offsets
 705  *      @ctrl: control register
 706  *      @ack_irq: IRQ ack
 707  *      @irq: interrupt lie
 708  *
 709  *      Setup hw_regs_t structure described by parameters.  You
 710  *      may set up the hw structure yourself OR use this routine to
 711  *      do it for you. This is basically a helper
 712  *
 713  */
 714
 715 void ide_setup_ports (  hw_regs_t *hw,
 716                         unsigned long base, int *offsets,
 717                         unsigned long ctrl, unsigned long intr,
 718                         ide_ack_intr_t *ack_intr,
 719 /*
 720  *                      ide_io_ops_t *iops,
 721  */
 722                         int irq)
 723 {
 724         int i;
 725
 726         memset(hw, 0, sizeof(hw_regs_t));
 727         for (i = 0; i < IDE_NR_PORTS; i++) {
 728                 if (offsets[i] == -1) {
 729                         switch(i) {
 730                                 case IDE_CONTROL_OFFSET:
 731                                         hw->io_ports[i] = ctrl;
 732                                         break;
 733 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
 734                                 case IDE_IRQ_OFFSET:
 735                                         hw->io_ports[i] = intr;
 736                                         break;
 737 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
 738                                 default:
 739                                         hw->io_ports[i] = 0;
 740                                         break;
 741                         }
 742                 } else {
 743                         hw->io_ports[i] = base + offsets[i];
 744                 }
 745         }
 746         hw->irq = irq;
 747         hw->dma = NO_DMA;
 748         hw->ack_intr = ack_intr;
 749 /*
 750  *      hw->iops = iops;
 751  */
 752 }
 753
 754 /**
 755  *      ide_register_hw_with_fixup      -       register IDE interface
 756  *      @hw: hardware registers
 757  *      @hwifp: pointer to returned hwif
 758  *      @fixup: fixup function
 759  *
 760  *      Register an IDE interface, specifying exactly the registers etc.
 761  *      Set init=1 iff calling before probes have taken place.
 762  *
 763  *      Returns -1 on error.
 764  */
 765
 766 int ide_register_hw_with_fixup(hw_regs_t *hw, ide_hwif_t **hwifp, void(*fixup)(ide_hwif_t *hwif))
 767 {
 768         int index, retry = 1;
 769         ide_hwif_t *hwif;
 770
 771         do {
 772                 for (index = 0; index < MAX_HWIFS; ++index) {
 773                         hwif = &ide_hwifs[index];
 774                         if (hwif->hw.io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
 775                                 goto found;
 776                 }
 777                 for (index = 0; index < MAX_HWIFS; ++index) {
 778                         hwif = &ide_hwifs[index];
 779                         if (hwif->hold)
 780                                 continue;
 781                         if ((!hwif->present && !hwif->mate && !initializing) ||
 782                             (!hwif->hw.io_ports[IDE_DATA_OFFSET] && initializing))
 783                                 goto found;
 784                 }
 785                 for (index = 0; index < MAX_HWIFS; index++)
 786                         ide_unregister(index);
 787         } while (retry--);
 788         return -1;
 789 found:
 790         if (hwif->present)
 791                 ide_unregister(index);
 792         else if (!hwif->hold) {
 793                 init_hwif_data(hwif, index);
 794                 init_hwif_default(hwif, index);
 795         }
 796         if (hwif->present)
 797                 return -1;
 798         memcpy(&hwif->hw, hw, sizeof(*hw));
 799         memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports));
 800         hwif->irq = hw->irq;
 801         hwif->noprobe = 0;
 802         hwif->chipset = hw->chipset;
 803         hwif->gendev.parent = hw->dev;
 804
 805         if (!initializing) {
 806                 probe_hwif_init_with_fixup(hwif, fixup);
 807                 create_proc_ide_interfaces();
 808         }
 809
 810         if (hwifp)
 811                 *hwifp = hwif;
 812
 813         return (initializing || hwif->present) ? index : -1;
 814 }
 815
 816 EXPORT_SYMBOL(ide_register_hw_with_fixup);
 817
 818 int ide_register_hw(hw_regs_t *hw, ide_hwif_t **hwifp)
 819 {
 820         return ide_register_hw_with_fixup(hw, hwifp, NULL);
 821 }
 822
 823 EXPORT_SYMBOL(ide_register_hw);
 824
 825 /*
 826  *      Locks for IDE setting functionality
 827  */
 828
 829 DECLARE_MUTEX(ide_setting_sem);
 830
 831 /**
 832  *      __ide_add_setting       -       add an ide setting option
 833  *      @drive: drive to use
 834  *      @name: setting name
 835  *      @rw: true if the function is read write
 836  *      @read_ioctl: function to call on read
 837  *      @write_ioctl: function to call on write
 838  *      @data_type: type of data
 839  *      @min: range minimum
 840  *      @max: range maximum
 841  *      @mul_factor: multiplication scale
 842  *      @div_factor: divison scale
 843  *      @data: private data field
 844  *      @set: setting
 845  *      @auto_remove: setting auto removal flag
 846  *
 847  *      Removes the setting named from the device if it is present.
 848  *      The function takes the settings_lock to protect against
 849  *      parallel changes. This function must not be called from IRQ
 850  *      context. Returns 0 on success or -1 on failure.
 851  *
 852  *      BUGS: This code is seriously over-engineered. There is also
 853  *      magic about how the driver specific features are setup. If
 854  *      a driver is attached we assume the driver settings are auto
 855  *      remove.
 856  */
 857
 858 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)
 859 {
 860         ide_settings_t **p = (ide_settings_t **) &drive->settings, *setting = NULL;
 861
 862         down(&ide_setting_sem);
 863         while ((*p) && strcmp((*p)->name, name) < 0)
 864                 p = &((*p)->next);
 865         if ((setting = kzalloc(sizeof(*setting), GFP_KERNEL)) == NULL)
 866                 goto abort;
 867         if ((setting->name = kmalloc(strlen(name) + 1, GFP_KERNEL)) == NULL)
 868                 goto abort;
 869         strcpy(setting->name, name);
 870         setting->rw = rw;
 871         setting->read_ioctl = read_ioctl;
 872         setting->write_ioctl = write_ioctl;
 873         setting->data_type = data_type;
 874         setting->min = min;
 875         setting->max = max;
 876         setting->mul_factor = mul_factor;
 877         setting->div_factor = div_factor;
 878         setting->data = data;
 879         setting->set = set;
 880
 881         setting->next = *p;
 882         if (auto_remove)
 883                 setting->auto_remove = 1;
 884         *p = setting;
 885         up(&ide_setting_sem);
 886         return 0;
 887 abort:
 888         up(&ide_setting_sem);
 889         kfree(setting);
 890         return -1;
 891 }
 892
 893 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)
 894 {
 895         return __ide_add_setting(drive, name, rw, read_ioctl, write_ioctl, data_type, min, max, mul_factor, div_factor, data, set, 1);
 896 }
 897
 898 EXPORT_SYMBOL(ide_add_setting);
 899
 900 /**
 901  *      __ide_remove_setting    -       remove an ide setting option
 902  *      @drive: drive to use
 903  *      @name: setting name
 904  *
 905  *      Removes the setting named from the device if it is present.
 906  *      The caller must hold the setting semaphore.
 907  */
 908
 909 static void __ide_remove_setting (ide_drive_t *drive, char *name)
 910 {
 911         ide_settings_t **p, *setting;
 912
 913         p = (ide_settings_t **) &drive->settings;
 914
 915         while ((*p) && strcmp((*p)->name, name))
 916                 p = &((*p)->next);
 917         if ((setting = (*p)) == NULL)
 918                 return;
 919
 920         (*p) = setting->next;
 921
 922         kfree(setting->name);
 923         kfree(setting);
 924 }
 925
 926 /**
 927  *      ide_find_setting_by_ioctl       -       find a drive specific ioctl
 928  *      @drive: drive to scan
 929  *      @cmd: ioctl command to handle
 930  *
 931  *      Scan's the device setting table for a matching entry and returns
 932  *      this or NULL if no entry is found. The caller must hold the
 933  *      setting semaphore
 934  */
 935
 936 static ide_settings_t *ide_find_setting_by_ioctl (ide_drive_t *drive, int cmd)
 937 {
 938         ide_settings_t *setting = drive->settings;
 939
 940         while (setting) {
 941                 if (setting->read_ioctl == cmd || setting->write_ioctl == cmd)
 942                         break;
 943                 setting = setting->next;
 944         }
 945
 946         return setting;
 947 }
 948
 949 /**
 950  *      ide_find_setting_by_name        -       find a drive specific setting
 951  *      @drive: drive to scan
 952  *      @name: setting name
 953  *
 954  *      Scan's the device setting table for a matching entry and returns
 955  *      this or NULL if no entry is found. The caller must hold the
 956  *      setting semaphore
 957  */
 958
 959 ide_settings_t *ide_find_setting_by_name (ide_drive_t *drive, char *name)
 960 {
 961         ide_settings_t *setting = drive->settings;
 962
 963         while (setting) {
 964                 if (strcmp(setting->name, name) == 0)
 965                         break;
 966                 setting = setting->next;
 967         }
 968         return setting;
 969 }
 970
 971 /**
 972  *      auto_remove_settings    -       remove driver specific settings
 973  *      @drive: drive
 974  *
 975  *      Automatically remove all the driver specific settings for this
 976  *      drive. This function may not be called from IRQ context. The
 977  *      caller must hold ide_setting_sem.
 978  */
 979
 980 static void auto_remove_settings (ide_drive_t *drive)
 981 {
 982         ide_settings_t *setting;
 983 repeat:
 984         setting = drive->settings;
 985         while (setting) {
 986                 if (setting->auto_remove) {
 987                         __ide_remove_setting(drive, setting->name);
 988                         goto repeat;
 989                 }
 990                 setting = setting->next;
 991         }
 992 }
 993
 994 /**
 995  *      ide_read_setting        -       read an IDE setting
 996  *      @drive: drive to read from
 997  *      @setting: drive setting
 998  *
 999  *      Read a drive setting and return the value. The caller
1000  *      must hold the ide_setting_sem when making this call.
1001  *
1002  *      BUGS: the data return and error are the same return value
1003  *      so an error -EINVAL and true return of the same value cannot
1004  *      be told apart
1005  */
1006
1007 int ide_read_setting (ide_drive_t *drive, ide_settings_t *setting)
1008 {
1009         int             val = -EINVAL;
1010         unsigned long   flags;
1011
1012         if ((setting->rw & SETTING_READ)) {
1013                 spin_lock_irqsave(&ide_lock, flags);
1014                 switch(setting->data_type) {
1015                         case TYPE_BYTE:
1016                                 val = *((u8 *) setting->data);
1017                                 break;
1018                         case TYPE_SHORT:
1019                                 val = *((u16 *) setting->data);
1020                                 break;
1021                         case TYPE_INT:
1022                         case TYPE_INTA:
1023                                 val = *((u32 *) setting->data);
1024                                 break;
1025                 }
1026                 spin_unlock_irqrestore(&ide_lock, flags);
1027         }
1028         return val;
1029 }
1030
1031 /**
1032  *      ide_spin_wait_hwgroup   -       wait for group
1033  *      @drive: drive in the group
1034  *
1035  *      Wait for an IDE device group to go non busy and then return
1036  *      holding the ide_lock which guards the hwgroup->busy status
1037  *      and right to use it.
1038  */
1039
1040 int ide_spin_wait_hwgroup (ide_drive_t *drive)
1041 {
1042         ide_hwgroup_t *hwgroup = HWGROUP(drive);
1043         unsigned long timeout = jiffies + (3 * HZ);
1044
1045         spin_lock_irq(&ide_lock);
1046
1047         while (hwgroup->busy) {
1048                 unsigned long lflags;
1049                 spin_unlock_irq(&ide_lock);
1050                 local_irq_set(lflags);
1051                 if (time_after(jiffies, timeout)) {
1052                         local_irq_restore(lflags);
1053                         printk(KERN_ERR "%s: channel busy\n", drive->name);
1054                         return -EBUSY;
1055                 }
1056                 local_irq_restore(lflags);
1057                 spin_lock_irq(&ide_lock);
1058         }
1059         return 0;
1060 }
1061
1062 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
1063
1064 /**
1065  *      ide_write_setting       -       read an IDE setting
1066  *      @drive: drive to read from
1067  *      @setting: drive setting
1068  *      @val: value
1069  *
1070  *      Write a drive setting if it is possible. The caller
1071  *      must hold the ide_setting_sem when making this call.
1072  *
1073  *      BUGS: the data return and error are the same return value
1074  *      so an error -EINVAL and true return of the same value cannot
1075  *      be told apart
1076  *
1077  *      FIXME:  This should be changed to enqueue a special request
1078  *      to the driver to change settings, and then wait on a sema for completion.
1079  *      The current scheme of polling is kludgy, though safe enough.
1080  */
1081
1082 int ide_write_setting (ide_drive_t *drive, ide_settings_t *setting, int val)
1083 {
1084         int i;
1085         u32 *p;
1086
1087         if (!capable(CAP_SYS_ADMIN))
1088                 return -EACCES;
1089         if (!(setting->rw & SETTING_WRITE))
1090                 return -EPERM;
1091         if (val < setting->min || val > setting->max)
1092                 return -EINVAL;
1093         if (setting->set)
1094                 return setting->set(drive, val);
1095         if (ide_spin_wait_hwgroup(drive))
1096                 return -EBUSY;
1097         switch (setting->data_type) {
1098                 case TYPE_BYTE:
1099                         *((u8 *) setting->data) = val;
1100                         break;
1101                 case TYPE_SHORT:
1102                         *((u16 *) setting->data) = val;
1103                         break;
1104                 case TYPE_INT:
1105                         *((u32 *) setting->data) = val;
1106                         break;
1107                 case TYPE_INTA:
1108                         p = (u32 *) setting->data;
1109                         for (i = 0; i < 1 << PARTN_BITS; i++, p++)
1110                                 *p = val;
1111                         break;
1112         }
1113         spin_unlock_irq(&ide_lock);
1114         return 0;
1115 }
1116
1117 static int set_io_32bit(ide_drive_t *drive, int arg)
1118 {
1119         drive->io_32bit = arg;
1120 #ifdef CONFIG_BLK_DEV_DTC2278
1121         if (HWIF(drive)->chipset == ide_dtc2278)
1122                 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
1123 #endif /* CONFIG_BLK_DEV_DTC2278 */
1124         return 0;
1125 }
1126
1127 static int set_using_dma (ide_drive_t *drive, int arg)
1128 {
1129 #ifdef CONFIG_BLK_DEV_IDEDMA
1130         if (!drive->id || !(drive->id->capability & 1))
1131                 return -EPERM;
1132         if (HWIF(drive)->ide_dma_check == NULL)
1133                 return -EPERM;
1134         if (arg) {
1135                 if (HWIF(drive)->ide_dma_check(drive)) return -EIO;
1136                 if (HWIF(drive)->ide_dma_on(drive)) return -EIO;
1137         } else {
1138                 if (__ide_dma_off(drive))
1139                         return -EIO;
1140         }
1141         return 0;
1142 #else
1143         return -EPERM;
1144 #endif
1145 }
1146
1147 static int set_pio_mode (ide_drive_t *drive, int arg)
1148 {
1149         struct request rq;
1150
1151         if (!HWIF(drive)->tuneproc)
1152                 return -ENOSYS;
1153         if (drive->special.b.set_tune)
1154                 return -EBUSY;
1155         ide_init_drive_cmd(&rq);
1156         drive->tune_req = (u8) arg;
1157         drive->special.b.set_tune = 1;
1158         (void) ide_do_drive_cmd(drive, &rq, ide_wait);
1159         return 0;
1160 }
1161
1162 static int set_xfer_rate (ide_drive_t *drive, int arg)
1163 {
1164         int err = ide_wait_cmd(drive,
1165                         WIN_SETFEATURES, (u8) arg,
1166                         SETFEATURES_XFER, 0, NULL);
1167
1168         if (!err && arg) {
1169                 ide_set_xfer_rate(drive, (u8) arg);
1170                 ide_driveid_update(drive);
1171         }
1172         return err;
1173 }
1174
1175 /**
1176  *      ide_add_generic_settings        -       generic ide settings
1177  *      @drive: drive being configured
1178  *
1179  *      Add the generic parts of the system settings to the /proc files and
1180  *      ioctls for this IDE device. The caller must not be holding the
1181  *      ide_setting_sem.
1182  */
1183
1184 void ide_add_generic_settings (ide_drive_t *drive)
1185 {
1186 /*
1187  *                        drive         setting name            read/write access                               read ioctl              write ioctl             data type       min     max                             mul_factor      div_factor      data pointer                    set function
1188  */
1189         __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);
1190         __ide_add_setting(drive,        "keepsettings",         SETTING_RW,                                     HDIO_GET_KEEPSETTINGS,  HDIO_SET_KEEPSETTINGS,  TYPE_BYTE,      0,      1,                              1,              1,              &drive->keep_settings,          NULL,           0);
1191         __ide_add_setting(drive,        "nice1",                SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->nice1,                  NULL,           0);
1192         __ide_add_setting(drive,        "pio_mode",             SETTING_WRITE,                                  -1,                     HDIO_SET_PIO_MODE,      TYPE_BYTE,      0,      255,                            1,              1,              NULL,                           set_pio_mode,   0);
1193         __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);
1194         __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);
1195         __ide_add_setting(drive,        "init_speed",           SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->init_speed,             NULL,           0);
1196         __ide_add_setting(drive,        "current_speed",        SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->current_speed,          set_xfer_rate,  0);
1197         __ide_add_setting(drive,        "number",               SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      3,                              1,              1,              &drive->dn,                     NULL,           0);
1198 }
1199
1200 /**
1201  *      system_bus_clock        -       clock guess
1202  *
1203  *      External version of the bus clock guess used by very old IDE drivers
1204  *      for things like VLB timings. Should not be used.
1205  */
1206
1207 int system_bus_clock (void)
1208 {
1209         return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
1210 }
1211
1212 EXPORT_SYMBOL(system_bus_clock);
1213
1214 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
1215 {
1216         ide_drive_t *drive = dev->driver_data;
1217         struct request rq;
1218         struct request_pm_state rqpm;
1219         ide_task_t args;
1220
1221         memset(&rq, 0, sizeof(rq));
1222         memset(&rqpm, 0, sizeof(rqpm));
1223         memset(&args, 0, sizeof(args));
1224         rq.cmd_type = REQ_TYPE_PM_SUSPEND;
1225         rq.special = &args;
1226         rq.data = &rqpm;
1227         rqpm.pm_step = ide_pm_state_start_suspend;
1228         if (mesg.event == PM_EVENT_PRETHAW)
1229                 mesg.event = PM_EVENT_FREEZE;
1230         rqpm.pm_state = mesg.event;
1231
1232         return ide_do_drive_cmd(drive, &rq, ide_wait);
1233 }
1234
1235 static int generic_ide_resume(struct device *dev)
1236 {
1237         ide_drive_t *drive = dev->driver_data;
1238         struct request rq;
1239         struct request_pm_state rqpm;
1240         ide_task_t args;
1241
1242         memset(&rq, 0, sizeof(rq));
1243         memset(&rqpm, 0, sizeof(rqpm));
1244         memset(&args, 0, sizeof(args));
1245         rq.cmd_type = REQ_TYPE_PM_RESUME;
1246         rq.special = &args;
1247         rq.data = &rqpm;
1248         rqpm.pm_step = ide_pm_state_start_resume;
1249         rqpm.pm_state = PM_EVENT_ON;
1250
1251         return ide_do_drive_cmd(drive, &rq, ide_head_wait);
1252 }
1253
1254 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
1255                         unsigned int cmd, unsigned long arg)
1256 {
1257         ide_settings_t *setting;
1258         ide_driver_t *drv;
1259         int err = 0;
1260         void __user *p = (void __user *)arg;
1261
1262         down(&ide_setting_sem);
1263         if ((setting = ide_find_setting_by_ioctl(drive, cmd)) != NULL) {
1264                 if (cmd == setting->read_ioctl) {
1265                         err = ide_read_setting(drive, setting);
1266                         up(&ide_setting_sem);
1267                         return err >= 0 ? put_user(err, (long __user *)arg) : err;
1268                 } else {
1269                         if (bdev != bdev->bd_contains)
1270                                 err = -EINVAL;
1271                         else
1272                                 err = ide_write_setting(drive, setting, arg);
1273                         up(&ide_setting_sem);
1274                         return err;
1275                 }
1276         }
1277         up(&ide_setting_sem);
1278
1279         switch (cmd) {
1280                 case HDIO_OBSOLETE_IDENTITY:
1281                 case HDIO_GET_IDENTITY:
1282                         if (bdev != bdev->bd_contains)
1283                                 return -EINVAL;
1284                         if (drive->id_read == 0)
1285                                 return -ENOMSG;
1286                         if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1287                                 return -EFAULT;
1288                         return 0;
1289
1290                 case HDIO_GET_NICE:
1291                         return put_user(drive->dsc_overlap      <<      IDE_NICE_DSC_OVERLAP    |
1292                                         drive->atapi_overlap    <<      IDE_NICE_ATAPI_OVERLAP  |
1293                                         drive->nice0            <<      IDE_NICE_0              |
1294                                         drive->nice1            <<      IDE_NICE_1              |
1295                                         drive->nice2            <<      IDE_NICE_2,
1296                                         (long __user *) arg);
1297
1298 #ifdef CONFIG_IDE_TASK_IOCTL
1299                 case HDIO_DRIVE_TASKFILE:
1300                         if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1301                                 return -EACCES;
1302                         switch(drive->media) {
1303                                 case ide_disk:
1304                                         return ide_taskfile_ioctl(drive, cmd, arg);
1305                                 default:
1306                                         return -ENOMSG;
1307                         }
1308 #endif /* CONFIG_IDE_TASK_IOCTL */
1309
1310                 case HDIO_DRIVE_CMD:
1311                         if (!capable(CAP_SYS_RAWIO))
1312                                 return -EACCES;
1313                         return ide_cmd_ioctl(drive, cmd, arg);
1314
1315                 case HDIO_DRIVE_TASK:
1316                         if (!capable(CAP_SYS_RAWIO))
1317                                 return -EACCES;
1318                         return ide_task_ioctl(drive, cmd, arg);
1319
1320                 case HDIO_SCAN_HWIF:
1321                 {
1322                         hw_regs_t hw;
1323                         int args[3];
1324                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1325                         if (copy_from_user(args, p, 3 * sizeof(int)))
1326                                 return -EFAULT;
1327                         memset(&hw, 0, sizeof(hw));
1328                         ide_init_hwif_ports(&hw, (unsigned long) args[0],
1329                                             (unsigned long) args[1], NULL);
1330                         hw.irq = args[2];
1331                         if (ide_register_hw(&hw, NULL) == -1)
1332                                 return -EIO;
1333                         return 0;
1334                 }
1335                 case HDIO_UNREGISTER_HWIF:
1336                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1337                         /* (arg > MAX_HWIFS) checked in function */
1338                         ide_unregister(arg);
1339                         return 0;
1340                 case HDIO_SET_NICE:
1341                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1342                         if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1343                                 return -EPERM;
1344                         drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1345                         drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1346                         if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1347                                 drive->dsc_overlap = 0;
1348                                 return -EPERM;
1349                         }
1350                         drive->nice1 = (arg >> IDE_NICE_1) & 1;
1351                         return 0;
1352                 case HDIO_DRIVE_RESET:
1353                 {
1354                         unsigned long flags;
1355                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1356
1357                         /*
1358                          *      Abort the current command on the
1359                          *      group if there is one, taking
1360                          *      care not to allow anything else
1361                          *      to be queued and to die on the
1362                          *      spot if we miss one somehow
1363                          */
1364
1365                         spin_lock_irqsave(&ide_lock, flags);
1366
1367                         if (HWGROUP(drive)->resetting) {
1368                                 spin_unlock_irqrestore(&ide_lock, flags);
1369                                 return -EBUSY;
1370                         }
1371
1372                         ide_abort(drive, "drive reset");
1373
1374                         BUG_ON(HWGROUP(drive)->handler);
1375
1376                         /* Ensure nothing gets queued after we
1377                            drop the lock. Reset will clear the busy */
1378
1379                         HWGROUP(drive)->busy = 1;
1380                         spin_unlock_irqrestore(&ide_lock, flags);
1381                         (void) ide_do_reset(drive);
1382
1383                         return 0;
1384                 }
1385
1386                 case CDROMEJECT:
1387                 case CDROMCLOSETRAY:
1388                         return scsi_cmd_ioctl(file, bdev->bd_disk, cmd, p);
1389
1390                 case HDIO_GET_BUSSTATE:
1391                         if (!capable(CAP_SYS_ADMIN))
1392                                 return -EACCES;
1393                         if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1394                                 return -EFAULT;
1395                         return 0;
1396
1397                 case HDIO_SET_BUSSTATE:
1398                         if (!capable(CAP_SYS_ADMIN))
1399                                 return -EACCES;
1400                         if (HWIF(drive)->busproc)
1401                                 return HWIF(drive)->busproc(drive, (int)arg);
1402                         return -EOPNOTSUPP;
1403                 default:
1404                         return -EINVAL;
1405         }
1406 }
1407
1408 EXPORT_SYMBOL(generic_ide_ioctl);
1409
1410 /*
1411  * stridx() returns the offset of c within s,
1412  * or -1 if c is '\0' or not found within s.
1413  */
1414 static int __init stridx (const char *s, char c)
1415 {
1416         char *i = strchr(s, c);
1417         return (i && c) ? i - s : -1;
1418 }
1419
1420 /*
1421  * match_parm() does parsing for ide_setup():
1422  *
1423  * 1. the first char of s must be '='.
1424  * 2. if the remainder matches one of the supplied keywords,
1425  *     the index (1 based) of the keyword is negated and returned.
1426  * 3. if the remainder is a series of no more than max_vals numbers
1427  *     separated by commas, the numbers are saved in vals[] and a
1428  *     count of how many were saved is returned.  Base10 is assumed,
1429  *     and base16 is allowed when prefixed with "0x".
1430  * 4. otherwise, zero is returned.
1431  */
1432 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1433 {
1434         static const char *decimal = "0123456789";
1435         static const char *hex = "0123456789abcdef";
1436         int i, n;
1437
1438         if (*s++ == '=') {
1439                 /*
1440                  * Try matching against the supplied keywords,
1441                  * and return -(index+1) if we match one
1442                  */
1443                 if (keywords != NULL) {
1444                         for (i = 0; *keywords != NULL; ++i) {
1445                                 if (!strcmp(s, *keywords++))
1446                                         return -(i+1);
1447                         }
1448                 }
1449                 /*
1450                  * Look for a series of no more than "max_vals"
1451                  * numeric values separated by commas, in base10,
1452                  * or base16 when prefixed with "0x".
1453                  * Return a count of how many were found.
1454                  */
1455                 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1456                         vals[n] = i;
1457                         while ((i = stridx(decimal, *++s)) >= 0)
1458                                 vals[n] = (vals[n] * 10) + i;
1459                         if (*s == 'x' && !vals[n]) {
1460                                 while ((i = stridx(hex, *++s)) >= 0)
1461                                         vals[n] = (vals[n] * 0x10) + i;
1462                         }
1463                         if (++n == max_vals)
1464                                 break;
1465                         if (*s == ',' || *s == ';')
1466                                 ++s;
1467                 }
1468                 if (!*s)
1469                         return n;
1470         }
1471         return 0;       /* zero = nothing matched */
1472 }
1473
1474 #ifdef CONFIG_BLK_DEV_ALI14XX
1475 static int __initdata probe_ali14xx;
1476 extern int ali14xx_init(void);
1477 #endif
1478 #ifdef CONFIG_BLK_DEV_UMC8672
1479 static int __initdata probe_umc8672;
1480 extern int umc8672_init(void);
1481 #endif
1482 #ifdef CONFIG_BLK_DEV_DTC2278
1483 static int __initdata probe_dtc2278;
1484 extern int dtc2278_init(void);
1485 #endif
1486 #ifdef CONFIG_BLK_DEV_HT6560B
1487 static int __initdata probe_ht6560b;
1488 extern int ht6560b_init(void);
1489 #endif
1490 #ifdef CONFIG_BLK_DEV_QD65XX
1491 static int __initdata probe_qd65xx;
1492 extern int qd65xx_init(void);
1493 #endif
1494
1495 static int __initdata is_chipset_set[MAX_HWIFS];
1496
1497 /*
1498  * ide_setup() gets called VERY EARLY during initialization,
1499  * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1500  *
1501  * Remember to update Documentation/ide.txt if you change something here.
1502  */
1503 static int __init ide_setup(char *s)
1504 {
1505         int i, vals[3];
1506         ide_hwif_t *hwif;
1507         ide_drive_t *drive;
1508         unsigned int hw, unit;
1509         const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1510         const char max_hwif  = '0' + (MAX_HWIFS - 1);
1511
1512
1513         if (strncmp(s,"hd",2) == 0 && s[2] == '=')      /* hd= is for hd.c   */
1514                 return 0;                               /* driver and not us */
1515
1516         if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1517                 return 0;
1518
1519         printk(KERN_INFO "ide_setup: %s", s);
1520         init_ide_data ();
1521
1522 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1523         if (!strcmp(s, "ide=doubler")) {
1524                 extern int ide_doubler;
1525
1526                 printk(" : Enabled support for IDE doublers\n");
1527                 ide_doubler = 1;
1528                 return 1;
1529         }
1530 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1531
1532         if (!strcmp(s, "ide=nodma")) {
1533                 printk(" : Prevented DMA\n");
1534                 noautodma = 1;
1535                 return 1;
1536         }
1537
1538 #ifdef CONFIG_BLK_DEV_IDEPCI
1539         if (!strcmp(s, "ide=reverse")) {
1540                 ide_scan_direction = 1;
1541                 printk(" : Enabled support for IDE inverse scan order.\n");
1542                 return 1;
1543         }
1544 #endif /* CONFIG_BLK_DEV_IDEPCI */
1545
1546         /*
1547          * Look for drive options:  "hdx="
1548          */
1549         if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1550                 const char *hd_words[] = {
1551                         "none", "noprobe", "nowerr", "cdrom", "serialize",
1552                         "autotune", "noautotune", "minus8", "swapdata", "bswap",
1553                         "noflush", "remap", "remap63", "scsi", NULL };
1554                 unit = s[2] - 'a';
1555                 hw   = unit / MAX_DRIVES;
1556                 unit = unit % MAX_DRIVES;
1557                 hwif = &ide_hwifs[hw];
1558                 drive = &hwif->drives[unit];
1559                 if (strncmp(s + 4, "ide-", 4) == 0) {
1560                         strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1561                         goto done;
1562                 }
1563                 switch (match_parm(&s[3], hd_words, vals, 3)) {
1564                         case -1: /* "none" */
1565                         case -2: /* "noprobe" */
1566                                 drive->noprobe = 1;
1567                                 goto done;
1568                         case -3: /* "nowerr" */
1569                                 drive->bad_wstat = BAD_R_STAT;
1570                                 hwif->noprobe = 0;
1571                                 goto done;
1572                         case -4: /* "cdrom" */
1573                                 drive->present = 1;
1574                                 drive->media = ide_cdrom;
1575                                 /* an ATAPI device ignores DRDY */
1576                                 drive->ready_stat = 0;
1577                                 hwif->noprobe = 0;
1578                                 goto done;
1579                         case -5: /* "serialize" */
1580                                 printk(" -- USE \"ide%d=serialize\" INSTEAD", hw);
1581                                 goto do_serialize;
1582                         case -6: /* "autotune" */
1583                                 drive->autotune = IDE_TUNE_AUTO;
1584                                 goto obsolete_option;
1585                         case -7: /* "noautotune" */
1586                                 drive->autotune = IDE_TUNE_NOAUTO;
1587                                 goto obsolete_option;
1588                         case -9: /* "swapdata" */
1589                         case -10: /* "bswap" */
1590                                 drive->bswap = 1;
1591                                 goto done;
1592                         case -11: /* noflush */
1593                                 drive->noflush = 1;
1594                                 goto done;
1595                         case -12: /* "remap" */
1596                                 drive->remap_0_to_1 = 1;
1597                                 goto done;
1598                         case -13: /* "remap63" */
1599                                 drive->sect0 = 63;
1600                                 goto done;
1601                         case -14: /* "scsi" */
1602                                 drive->scsi = 1;
1603                                 goto done;
1604                         case 3: /* cyl,head,sect */
1605                                 drive->media    = ide_disk;
1606                                 drive->ready_stat = READY_STAT;
1607                                 drive->cyl      = drive->bios_cyl  = vals[0];
1608                                 drive->head     = drive->bios_head = vals[1];
1609                                 drive->sect     = drive->bios_sect = vals[2];
1610                                 drive->present  = 1;
1611                                 drive->forced_geom = 1;
1612                                 hwif->noprobe = 0;
1613                                 goto done;
1614                         default:
1615                                 goto bad_option;
1616                 }
1617         }
1618
1619         if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1620                 goto bad_option;
1621         /*
1622          * Look for bus speed option:  "idebus="
1623          */
1624         if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1625                 if (match_parm(&s[6], NULL, vals, 1) != 1)
1626                         goto bad_option;
1627                 if (vals[0] >= 20 && vals[0] <= 66) {
1628                         idebus_parameter = vals[0];
1629                 } else
1630                         printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1631                 goto done;
1632         }
1633         /*
1634          * Look for interface options:  "idex="
1635          */
1636         if (s[3] >= '0' && s[3] <= max_hwif) {
1637                 /*
1638                  * Be VERY CAREFUL changing this: note hardcoded indexes below
1639                  * (-8, -9, -10) are reserved to ease the hardcoding.
1640                  */
1641                 static const char *ide_words[] = {
1642                         "noprobe", "serialize", "autotune", "noautotune",
1643                         "reset", "dma", "ata66", "minus8", "minus9",
1644                         "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1645                         "dtc2278", "umc8672", "ali14xx", NULL };
1646                 hw = s[3] - '0';
1647                 hwif = &ide_hwifs[hw];
1648                 i = match_parm(&s[4], ide_words, vals, 3);
1649
1650                 /*
1651                  * Cryptic check to ensure chipset not already set for hwif.
1652                  * Note: we can't depend on hwif->chipset here.
1653                  */
1654                 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1655                         /* chipset already specified */
1656                         if (is_chipset_set[hw])
1657                                 goto bad_option;
1658                         if (i > -18 && i <= -11) {
1659                                 /* these drivers are for "ide0=" only */
1660                                 if (hw != 0)
1661                                         goto bad_hwif;
1662                                 /* chipset already specified for 2nd port */
1663                                 if (is_chipset_set[hw+1])
1664                                         goto bad_option;
1665                         }
1666                         is_chipset_set[hw] = 1;
1667                         printk("\n");
1668                 }
1669
1670                 switch (i) {
1671 #ifdef CONFIG_BLK_DEV_ALI14XX
1672                         case -17: /* "ali14xx" */
1673                                 probe_ali14xx = 1;
1674                                 goto done;
1675 #endif
1676 #ifdef CONFIG_BLK_DEV_UMC8672
1677                         case -16: /* "umc8672" */
1678                                 probe_umc8672 = 1;
1679                                 goto done;
1680 #endif
1681 #ifdef CONFIG_BLK_DEV_DTC2278
1682                         case -15: /* "dtc2278" */
1683                                 probe_dtc2278 = 1;
1684                                 goto done;
1685 #endif
1686 #ifdef CONFIG_BLK_DEV_CMD640
1687                         case -14: /* "cmd640_vlb" */
1688                         {
1689                                 extern int cmd640_vlb; /* flag for cmd640.c */
1690                                 cmd640_vlb = 1;
1691                                 goto done;
1692                         }
1693 #endif
1694 #ifdef CONFIG_BLK_DEV_HT6560B
1695                         case -13: /* "ht6560b" */
1696                                 probe_ht6560b = 1;
1697                                 goto done;
1698 #endif
1699 #ifdef CONFIG_BLK_DEV_QD65XX
1700                         case -12: /* "qd65xx" */
1701                                 probe_qd65xx = 1;
1702                                 goto done;
1703 #endif
1704 #ifdef CONFIG_BLK_DEV_4DRIVES
1705                         case -11: /* "four" drives on one set of ports */
1706                         {
1707                                 ide_hwif_t *mate = &ide_hwifs[hw^1];
1708                                 mate->drives[0].select.all ^= 0x20;
1709                                 mate->drives[1].select.all ^= 0x20;
1710                                 hwif->chipset = mate->chipset = ide_4drives;
1711                                 mate->irq = hwif->irq;
1712                                 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1713                                 goto do_serialize;
1714                         }
1715 #endif /* CONFIG_BLK_DEV_4DRIVES */
1716                         case -10: /* minus10 */
1717                         case -9: /* minus9 */
1718                         case -8: /* minus8 */
1719                                 goto bad_option;
1720                         case -7: /* ata66 */
1721 #ifdef CONFIG_BLK_DEV_IDEPCI
1722                                 hwif->udma_four = 1;
1723                                 goto obsolete_option;
1724 #else
1725                                 goto bad_hwif;
1726 #endif
1727                         case -6: /* dma */
1728                                 hwif->autodma = 1;
1729                                 goto obsolete_option;
1730                         case -5: /* "reset" */
1731                                 hwif->reset = 1;
1732                                 goto obsolete_option;
1733                         case -4: /* "noautotune" */
1734                                 hwif->drives[0].autotune = IDE_TUNE_NOAUTO;
1735                                 hwif->drives[1].autotune = IDE_TUNE_NOAUTO;
1736                                 goto obsolete_option;
1737                         case -3: /* "autotune" */
1738                                 hwif->drives[0].autotune = IDE_TUNE_AUTO;
1739                                 hwif->drives[1].autotune = IDE_TUNE_AUTO;
1740                                 goto obsolete_option;
1741                         case -2: /* "serialize" */
1742                         do_serialize:
1743                                 hwif->mate = &ide_hwifs[hw^1];
1744                                 hwif->mate->mate = hwif;
1745                                 hwif->serialized = hwif->mate->serialized = 1;
1746                                 goto obsolete_option;
1747
1748                         case -1: /* "noprobe" */
1749                                 hwif->noprobe = 1;
1750                                 goto done;
1751
1752                         case 1: /* base */
1753                                 vals[1] = vals[0] + 0x206; /* default ctl */
1754                         case 2: /* base,ctl */
1755                                 vals[2] = 0;    /* default irq = probe for it */
1756                         case 3: /* base,ctl,irq */
1757                                 hwif->hw.irq = vals[2];
1758                                 ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq);
1759                                 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
1760                                 hwif->irq      = vals[2];
1761                                 hwif->noprobe  = 0;
1762                                 hwif->chipset  = ide_forced;
1763                                 goto obsolete_option;
1764
1765                         case 0: goto bad_option;
1766                         default:
1767                                 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1768                                 return 1;
1769                 }
1770         }
1771 bad_option:
1772         printk(" -- BAD OPTION\n");
1773         return 1;
1774 obsolete_option:
1775         printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1776         return 1;
1777 bad_hwif:
1778         printk("-- NOT SUPPORTED ON ide%d", hw);
1779 done:
1780         printk("\n");
1781         return 1;
1782 }
1783
1784 extern void pnpide_init(void);
1785 extern void h8300_ide_init(void);
1786
1787 /*
1788  * probe_for_hwifs() finds/initializes "known" IDE interfaces
1789  */
1790 static void __init probe_for_hwifs (void)
1791 {
1792 #ifdef CONFIG_BLK_DEV_IDEPCI
1793         ide_scan_pcibus(ide_scan_direction);
1794 #endif /* CONFIG_BLK_DEV_IDEPCI */
1795
1796 #ifdef CONFIG_ETRAX_IDE
1797         {
1798                 extern void init_e100_ide(void);
1799                 init_e100_ide();
1800         }
1801 #endif /* CONFIG_ETRAX_IDE */
1802 #ifdef CONFIG_BLK_DEV_CMD640
1803         {
1804                 extern void ide_probe_for_cmd640x(void);
1805                 ide_probe_for_cmd640x();
1806         }
1807 #endif /* CONFIG_BLK_DEV_CMD640 */
1808 #ifdef CONFIG_BLK_DEV_IDE_PMAC
1809         {
1810                 extern void pmac_ide_probe(void);
1811                 pmac_ide_probe();
1812         }
1813 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
1814 #ifdef CONFIG_BLK_DEV_GAYLE
1815         {
1816                 extern void gayle_init(void);
1817                 gayle_init();
1818         }
1819 #endif /* CONFIG_BLK_DEV_GAYLE */
1820 #ifdef CONFIG_BLK_DEV_FALCON_IDE
1821         {
1822                 extern void falconide_init(void);
1823                 falconide_init();
1824         }
1825 #endif /* CONFIG_BLK_DEV_FALCON_IDE */
1826 #ifdef CONFIG_BLK_DEV_MAC_IDE
1827         {
1828                 extern void macide_init(void);
1829                 macide_init();
1830         }
1831 #endif /* CONFIG_BLK_DEV_MAC_IDE */
1832 #ifdef CONFIG_BLK_DEV_Q40IDE
1833         {
1834                 extern void q40ide_init(void);
1835                 q40ide_init();
1836         }
1837 #endif /* CONFIG_BLK_DEV_Q40IDE */
1838 #ifdef CONFIG_BLK_DEV_BUDDHA
1839         {
1840                 extern void buddha_init(void);
1841                 buddha_init();
1842         }
1843 #endif /* CONFIG_BLK_DEV_BUDDHA */
1844 #ifdef CONFIG_BLK_DEV_IDEPNP
1845         pnpide_init();
1846 #endif
1847 #ifdef CONFIG_H8300
1848         h8300_ide_init();
1849 #endif
1850 }
1851
1852 void ide_register_subdriver(ide_drive_t *drive, ide_driver_t *driver)
1853 {
1854 #ifdef CONFIG_PROC_FS
1855         ide_add_proc_entries(drive->proc, driver->proc, drive);
1856 #endif
1857 }
1858
1859 EXPORT_SYMBOL(ide_register_subdriver);
1860
1861 /**
1862  *      ide_unregister_subdriver        -       disconnect drive from driver
1863  *      @drive: drive to unplug
1864  *      @driver: driver
1865  *
1866  *      Disconnect a drive from the driver it was attached to and then
1867  *      clean up the various proc files and other objects attached to it.
1868  *
1869  *      Takes ide_setting_sem and ide_lock.
1870  *      Caller must hold none of the locks.
1871  */
1872
1873 void ide_unregister_subdriver(ide_drive_t *drive, ide_driver_t *driver)
1874 {
1875         unsigned long flags;
1876
1877 #ifdef CONFIG_PROC_FS
1878         ide_remove_proc_entries(drive->proc, driver->proc);
1879 #endif
1880         down(&ide_setting_sem);
1881         spin_lock_irqsave(&ide_lock, flags);
1882         /*
1883          * ide_setting_sem protects the settings list
1884          * ide_lock protects the use of settings
1885          *
1886          * so we need to hold both, ide_settings_sem because we want to
1887          * modify the settings list, and ide_lock because we cannot take
1888          * a setting out that is being used.
1889          *
1890          * OTOH both ide_{read,write}_setting are only ever used under
1891          * ide_setting_sem.
1892          */
1893         auto_remove_settings(drive);
1894         spin_unlock_irqrestore(&ide_lock, flags);
1895         up(&ide_setting_sem);
1896 }
1897
1898 EXPORT_SYMBOL(ide_unregister_subdriver);
1899
1900 /*
1901  * Probe module
1902  */
1903
1904 EXPORT_SYMBOL(ide_lock);
1905
1906 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1907 {
1908         return 1;
1909 }
1910
1911 static char *media_string(ide_drive_t *drive)
1912 {
1913         switch (drive->media) {
1914         case ide_disk:
1915                 return "disk";
1916         case ide_cdrom:
1917                 return "cdrom";
1918         case ide_tape:
1919                 return "tape";
1920         case ide_floppy:
1921                 return "floppy";
1922         default:
1923                 return "UNKNOWN";
1924         }
1925 }
1926
1927 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1928 {
1929         ide_drive_t *drive = to_ide_device(dev);
1930         return sprintf(buf, "%s\n", media_string(drive));
1931 }
1932
1933 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1934 {
1935         ide_drive_t *drive = to_ide_device(dev);
1936         return sprintf(buf, "%s\n", drive->name);
1937 }
1938
1939 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1940 {
1941         ide_drive_t *drive = to_ide_device(dev);
1942         return sprintf(buf, "ide:m-%s\n", media_string(drive));
1943 }
1944
1945 static struct device_attribute ide_dev_attrs[] = {
1946         __ATTR_RO(media),
1947         __ATTR_RO(drivename),
1948         __ATTR_RO(modalias),
1949         __ATTR_NULL
1950 };
1951
1952 static int ide_uevent(struct device *dev, char **envp, int num_envp,
1953                       char *buffer, int buffer_size)
1954 {
1955         ide_drive_t *drive = to_ide_device(dev);
1956         int i = 0;
1957         int length = 0;
1958
1959         add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1960                        "MEDIA=%s", media_string(drive));
1961         add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1962                        "DRIVENAME=%s", drive->name);
1963         add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1964                        "MODALIAS=ide:m-%s", media_string(drive));
1965         envp[i] = NULL;
1966         return 0;
1967 }
1968
1969 static int generic_ide_probe(struct device *dev)
1970 {
1971         ide_drive_t *drive = to_ide_device(dev);
1972         ide_driver_t *drv = to_ide_driver(dev->driver);
1973
1974         return drv->probe ? drv->probe(drive) : -ENODEV;
1975 }
1976
1977 static int generic_ide_remove(struct device *dev)
1978 {
1979         ide_drive_t *drive = to_ide_device(dev);
1980         ide_driver_t *drv = to_ide_driver(dev->driver);
1981
1982         if (drv->remove)
1983                 drv->remove(drive);
1984
1985         return 0;
1986 }
1987
1988 static void generic_ide_shutdown(struct device *dev)
1989 {
1990         ide_drive_t *drive = to_ide_device(dev);
1991         ide_driver_t *drv = to_ide_driver(dev->driver);
1992
1993         if (dev->driver && drv->shutdown)
1994                 drv->shutdown(drive);
1995 }
1996
1997 struct bus_type ide_bus_type = {
1998         .name           = "ide",
1999         .match          = ide_bus_match,
2000         .uevent         = ide_uevent,
2001         .probe          = generic_ide_probe,
2002         .remove         = generic_ide_remove,
2003         .shutdown       = generic_ide_shutdown,
2004         .dev_attrs      = ide_dev_attrs,
2005         .suspend        = generic_ide_suspend,
2006         .resume         = generic_ide_resume,
2007 };
2008
2009 EXPORT_SYMBOL_GPL(ide_bus_type);
2010
2011 /*
2012  * This is gets invoked once during initialization, to set *everything* up
2013  */
2014 static int __init ide_init(void)
2015 {
2016         int ret;
2017
2018         printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
2019         system_bus_speed = ide_system_bus_speed();
2020
2021         ret = bus_register(&ide_bus_type);
2022         if (ret < 0) {
2023                 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
2024                 return ret;
2025         }
2026
2027         init_ide_data();
2028
2029 #ifdef CONFIG_PROC_FS
2030         proc_ide_root = proc_mkdir("ide", NULL);
2031 #endif
2032
2033 #ifdef CONFIG_BLK_DEV_ALI14XX
2034         if (probe_ali14xx)
2035                 (void)ali14xx_init();
2036 #endif
2037 #ifdef CONFIG_BLK_DEV_UMC8672
2038         if (probe_umc8672)
2039                 (void)umc8672_init();
2040 #endif
2041 #ifdef CONFIG_BLK_DEV_DTC2278
2042         if (probe_dtc2278)
2043                 (void)dtc2278_init();
2044 #endif
2045 #ifdef CONFIG_BLK_DEV_HT6560B
2046         if (probe_ht6560b)
2047                 (void)ht6560b_init();
2048 #endif
2049 #ifdef CONFIG_BLK_DEV_QD65XX
2050         if (probe_qd65xx)
2051                 (void)qd65xx_init();
2052 #endif
2053
2054         initializing = 1;
2055         /* Probe for special PCI and other "known" interface chipsets. */
2056         probe_for_hwifs();
2057         initializing = 0;
2058
2059 #ifdef CONFIG_PROC_FS
2060         proc_ide_create();
2061 #endif
2062         return 0;
2063 }
2064
2065 #ifdef MODULE
2066 static char *options = NULL;
2067 module_param(options, charp, 0);
2068 MODULE_LICENSE("GPL");
2069
2070 static void __init parse_options (char *line)
2071 {
2072         char *next = line;
2073
2074         if (line == NULL || !*line)
2075                 return;
2076         while ((line = next) != NULL) {
2077                 if ((next = strchr(line,' ')) != NULL)
2078                         *next++ = 0;
2079                 if (!ide_setup(line))
2080                         printk (KERN_INFO "Unknown option '%s'\n", line);
2081         }
2082 }
2083
2084 int __init init_module (void)
2085 {
2086         parse_options(options);
2087         return ide_init();
2088 }
2089
2090 void cleanup_module (void)
2091 {
2092         int index;
2093
2094         for (index = 0; index < MAX_HWIFS; ++index)
2095                 ide_unregister(index);
2096
2097 #ifdef CONFIG_PROC_FS
2098         proc_ide_destroy();
2099 #endif
2100
2101         bus_unregister(&ide_bus_type);
2102 }
2103
2104 #else /* !MODULE */
2105
2106 __setup("", ide_setup);
2107
2108 module_init(ide_init);
2109
2110 #endif /* MODULE */