drivers/ide/ide.c

   1 /*
   2  *  linux/drivers/ide/ide.c             Version 7.00beta2       Mar 05 2003
   3  *
   4  *  Copyright (C) 1994-1998  Linus Torvalds & authors (see below)
   5  */
   6
   7 /*
   8  *  Mostly written by Mark Lord  <mlord@pobox.com>
   9  *                and Gadi Oxman <gadio@netvision.net.il>
  10  *                and Andre Hedrick <andre@linux-ide.org>
  11  *
  12  *  See linux/MAINTAINERS for address of current maintainer.
  13  *
  14  * This is the multiple IDE interface driver, as evolved from hd.c.
  15  * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs
  16  *   (usually 14 & 15).
  17  * There can be up to two drives per interface, as per the ATA-2 spec.
  18  *
  19  * Primary:    ide0, port 0x1f0; major=3;  hda is minor=0; hdb is minor=64
  20  * Secondary:  ide1, port 0x170; major=22; hdc is minor=0; hdd is minor=64
  21  * Tertiary:   ide2, port 0x???; major=33; hde is minor=0; hdf is minor=64
  22  * Quaternary: ide3, port 0x???; major=34; hdg is minor=0; hdh is minor=64
  23  * ...
  24  *
  25  *  From hd.c:
  26  *  |
  27  *  | It traverses the request-list, using interrupts to jump between functions.
  28  *  | As nearly all functions can be called within interrupts, we may not sleep.
  29  *  | Special care is recommended.  Have Fun!
  30  *  |
  31  *  | modified by Drew Eckhardt to check nr of hd's from the CMOS.
  32  *  |
  33  *  | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
  34  *  | in the early extended-partition checks and added DM partitions.
  35  *  |
  36  *  | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
  37  *  |
  38  *  | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
  39  *  | and general streamlining by Mark Lord (mlord@pobox.com).
  40  *
  41  *  October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
  42  *
  43  *      Mark Lord       (mlord@pobox.com)               (IDE Perf.Pkg)
  44  *      Delman Lee      (delman@ieee.org)               ("Mr. atdisk2")
  45  *      Scott Snyder    (snyder@fnald0.fnal.gov)        (ATAPI IDE cd-rom)
  46  *
  47  *  This was a rewrite of just about everything from hd.c, though some original
  48  *  code is still sprinkled about.  Think of it as a major evolution, with
  49  *  inspiration from lots of linux users, esp.  hamish@zot.apana.org.au
  50  *
  51  *  Version 1.0 ALPHA   initial code, primary i/f working okay
  52  *  Version 1.3 BETA    dual i/f on shared irq tested & working!
  53  *  Version 1.4 BETA    added auto probing for irq(s)
  54  *  Version 1.5 BETA    added ALPHA (untested) support for IDE cd-roms,
  55  *  ...
  56  * Version 5.50         allow values as small as 20 for idebus=
  57  * Version 5.51         force non io_32bit in drive_cmd_intr()
  58  *                      change delay_10ms() to delay_50ms() to fix problems
  59  * Version 5.52         fix incorrect invalidation of removable devices
  60  *                      add "hdx=slow" command line option
  61  * Version 5.60         start to modularize the driver; the disk and ATAPI
  62  *                       drivers can be compiled as loadable modules.
  63  *                      move IDE probe code to ide-probe.c
  64  *                      move IDE disk code to ide-disk.c
  65  *                      add support for generic IDE device subdrivers
  66  *                      add m68k code from Geert Uytterhoeven
  67  *                      probe all interfaces by default
  68  *                      add ioctl to (re)probe an interface
  69  * Version 6.00         use per device request queues
  70  *                      attempt to optimize shared hwgroup performance
  71  *                      add ioctl to manually adjust bandwidth algorithms
  72  *                      add kerneld support for the probe module
  73  *                      fix bug in ide_error()
  74  *                      fix bug in the first ide_get_lock() call for Atari
  75  *                      don't flush leftover data for ATAPI devices
  76  * Version 6.01         clear hwgroup->active while the hwgroup sleeps
  77  *                      support HDIO_GETGEO for floppies
  78  * Version 6.02         fix ide_ack_intr() call
  79  *                      check partition table on floppies
  80  * Version 6.03         handle bad status bit sequencing in ide_wait_stat()
  81  * Version 6.10         deleted old entries from this list of updates
  82  *                      replaced triton.c with ide-dma.c generic PCI DMA
  83  *                      added support for BIOS-enabled UltraDMA
  84  *                      rename all "promise" things to "pdc4030"
  85  *                      fix EZ-DRIVE handling on small disks
  86  * Version 6.11         fix probe error in ide_scan_devices()
  87  *                      fix ancient "jiffies" polling bugs
  88  *                      mask all hwgroup interrupts on each irq entry
  89  * Version 6.12         integrate ioctl and proc interfaces
  90  *                      fix parsing of "idex=" command line parameter
  91  * Version 6.13         add support for ide4/ide5 courtesy rjones@orchestream.com
  92  * Version 6.14         fixed IRQ sharing among PCI devices
  93  * Version 6.15         added SMP awareness to IDE drivers
  94  * Version 6.16         fixed various bugs; even more SMP friendly
  95  * Version 6.17         fix for newest EZ-Drive problem
  96  * Version 6.18         default unpartitioned-disk translation now "BIOS LBA"
  97  * Version 6.19         Re-design for a UNIFORM driver for all platforms,
  98  *                        model based on suggestions from Russell King and
  99  *                        Geert Uytterhoeven
 100  *                      Promise DC4030VL now supported.
 101  *                      add support for ide6/ide7
 102  *                      delay_50ms() changed to ide_delay_50ms() and exported.
 103  * Version 6.20         Added/Fixed Generic ATA-66 support and hwif detection.
 104  *                      Added hdx=flash to allow for second flash disk
 105  *                        detection w/o the hang loop.
 106  *                      Added support for ide8/ide9
 107  *                      Added idex=ata66 for the quirky chipsets that are
 108  *                        ATA-66 compliant, but have yet to determine a method
 109  *                        of verification of the 80c cable presence.
 110  *                        Specifically Promise's PDC20262 chipset.
 111  * Version 6.21         Fixing/Fixed SMP spinlock issue with insight from an old
 112  *                        hat that clarified original low level driver design.
 113  * Version 6.30         Added SMP support; fixed multmode issues.  -ml
 114  * Version 6.31         Debug Share INTR's and request queue streaming
 115  *                      Native ATA-100 support
 116  *                      Prep for Cascades Project
 117  * Version 7.00alpha    First named revision of ide rearrange
 118  *
 119  *  Some additional driver compile-time options are in ./include/linux/ide.h
 120  *
 121  *  To do, in likely order of completion:
 122  *      - modify kernel to obtain BIOS geometry for drives on 2nd/3rd/4th i/f
 123  *
 124  */
 125
 126 #define REVISION        "Revision: 7.00alpha2"
 127 #define VERSION         "Id: ide.c 7.00a2 20020906"
 128
 129 #undef REALLY_SLOW_IO           /* most systems can safely undef this */
 130
 131 #define _IDE_C                  /* Tell ide.h it's really us */
 132
 133 #include <linux/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 #ifdef CONFIG_BLK_DEV_IDEACPI
 191 int ide_noacpi = 0;
 192 int ide_noacpitfs = 1;
 193 int ide_noacpionboot = 1;
 194 #endif
 195
 196 /*
 197  * This is declared extern in ide.h, for access by other IDE modules:
 198  */
 199 ide_hwif_t ide_hwifs[MAX_HWIFS];        /* master data repository */
 200
 201 EXPORT_SYMBOL(ide_hwifs);
 202
 203 /*
 204  * Do not even *think* about calling this!
 205  */
 206 static void init_hwif_data(ide_hwif_t *hwif, unsigned int index)
 207 {
 208         unsigned int unit;
 209
 210         /* bulk initialize hwif & drive info with zeros */
 211         memset(hwif, 0, sizeof(ide_hwif_t));
 212
 213         /* fill in any non-zero initial values */
 214         hwif->index     = index;
 215         hwif->major     = ide_hwif_to_major[index];
 216
 217         hwif->name[0]   = 'i';
 218         hwif->name[1]   = 'd';
 219         hwif->name[2]   = 'e';
 220         hwif->name[3]   = '0' + index;
 221
 222         hwif->bus_state = BUSSTATE_ON;
 223
 224         hwif->atapi_dma = 0;            /* disable all atapi dma */
 225         hwif->ultra_mask = 0x80;        /* disable all ultra */
 226         hwif->mwdma_mask = 0x80;        /* disable all mwdma */
 227         hwif->swdma_mask = 0x80;        /* disable all swdma */
 228
 229         init_completion(&hwif->gendev_rel_comp);
 230
 231         default_hwif_iops(hwif);
 232         default_hwif_transport(hwif);
 233         for (unit = 0; unit < MAX_DRIVES; ++unit) {
 234                 ide_drive_t *drive = &hwif->drives[unit];
 235
 236                 drive->media                    = ide_disk;
 237                 drive->select.all               = (unit<<4)|0xa0;
 238                 drive->hwif                     = hwif;
 239                 drive->ctl                      = 0x08;
 240                 drive->ready_stat               = READY_STAT;
 241                 drive->bad_wstat                = BAD_W_STAT;
 242                 drive->special.b.recalibrate    = 1;
 243                 drive->special.b.set_geometry   = 1;
 244                 drive->name[0]                  = 'h';
 245                 drive->name[1]                  = 'd';
 246                 drive->name[2]                  = 'a' + (index * MAX_DRIVES) + unit;
 247                 drive->max_failures             = IDE_DEFAULT_MAX_FAILURES;
 248                 drive->using_dma                = 0;
 249                 drive->vdma                     = 0;
 250                 INIT_LIST_HEAD(&drive->list);
 251                 init_completion(&drive->gendev_rel_comp);
 252         }
 253 }
 254
 255 static void init_hwif_default(ide_hwif_t *hwif, unsigned int index)
 256 {
 257         hw_regs_t hw;
 258
 259         memset(&hw, 0, sizeof(hw_regs_t));
 260
 261         ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq);
 262
 263         memcpy(&hwif->hw, &hw, sizeof(hw));
 264         memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
 265
 266         hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
 267 #ifdef CONFIG_BLK_DEV_HD
 268         if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA)
 269                 hwif->noprobe = 1;      /* may be overridden by ide_setup() */
 270 #endif
 271 }
 272
 273 extern void ide_arm_init(void);
 274
 275 /*
 276  * init_ide_data() sets reasonable default values into all fields
 277  * of all instances of the hwifs and drives, but only on the first call.
 278  * Subsequent calls have no effect (they don't wipe out anything).
 279  *
 280  * This routine is normally called at driver initialization time,
 281  * but may also be called MUCH earlier during kernel "command-line"
 282  * parameter processing.  As such, we cannot depend on any other parts
 283  * of the kernel (such as memory allocation) to be functioning yet.
 284  *
 285  * This is too bad, as otherwise we could dynamically allocate the
 286  * ide_drive_t structs as needed, rather than always consuming memory
 287  * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
 288  *
 289  * FIXME: We should stuff the setup data into __init and copy the
 290  * relevant hwifs/allocate them properly during boot.
 291  */
 292 #define MAGIC_COOKIE 0x12345678
 293 static void __init init_ide_data (void)
 294 {
 295         ide_hwif_t *hwif;
 296         unsigned int index;
 297         static unsigned long magic_cookie = MAGIC_COOKIE;
 298
 299         if (magic_cookie != MAGIC_COOKIE)
 300                 return;         /* already initialized */
 301         magic_cookie = 0;
 302
 303         /* Initialise all interface structures */
 304         for (index = 0; index < MAX_HWIFS; ++index) {
 305                 hwif = &ide_hwifs[index];
 306                 init_hwif_data(hwif, index);
 307                 init_hwif_default(hwif, index);
 308 #if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
 309                 hwif->irq = hwif->hw.irq =
 310                         ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
 311 #endif
 312         }
 313 #ifdef CONFIG_IDE_ARM
 314         initializing = 1;
 315         ide_arm_init();
 316         initializing = 0;
 317 #endif
 318 }
 319
 320 /**
 321  *      ide_system_bus_speed    -       guess bus speed
 322  *
 323  *      ide_system_bus_speed() returns what we think is the system VESA/PCI
 324  *      bus speed (in MHz). This is used for calculating interface PIO timings.
 325  *      The default is 40 for known PCI systems, 50 otherwise.
 326  *      The "idebus=xx" parameter can be used to override this value.
 327  *      The actual value to be used is computed/displayed the first time
 328  *      through. Drivers should only use this as a last resort.
 329  *
 330  *      Returns a guessed speed in MHz.
 331  */
 332
 333 static int ide_system_bus_speed(void)
 334 {
 335 #ifdef CONFIG_PCI
 336         static struct pci_device_id pci_default[] = {
 337                 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
 338                 { }
 339         };
 340 #else
 341 #define pci_default 0
 342 #endif /* CONFIG_PCI */
 343
 344         if (!system_bus_speed) {
 345                 if (idebus_parameter) {
 346                         /* user supplied value */
 347                         system_bus_speed = idebus_parameter;
 348                 } else if (pci_dev_present(pci_default)) {
 349                         /* safe default value for PCI */
 350                         system_bus_speed = 33;
 351                 } else {
 352                         /* safe default value for VESA and PCI */
 353                         system_bus_speed = 50;
 354                 }
 355                 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
 356                         "for PIO modes%s\n", system_bus_speed,
 357                         idebus_parameter ? "" : "; override with idebus=xx");
 358         }
 359         return system_bus_speed;
 360 }
 361
 362 #ifdef CONFIG_PROC_FS
 363 struct proc_dir_entry *proc_ide_root;
 364 #endif
 365
 366 static struct resource* hwif_request_region(ide_hwif_t *hwif,
 367                                             unsigned long addr, int num)
 368 {
 369         struct resource *res = request_region(addr, num, hwif->name);
 370
 371         if (!res)
 372                 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
 373                                 hwif->name, addr, addr+num-1);
 374         return res;
 375 }
 376
 377 /**
 378  *      ide_hwif_request_regions - request resources for IDE
 379  *      @hwif: interface to use
 380  *
 381  *      Requests all the needed resources for an interface.
 382  *      Right now core IDE code does this work which is deeply wrong.
 383  *      MMIO leaves it to the controller driver,
 384  *      PIO will migrate this way over time.
 385  */
 386
 387 int ide_hwif_request_regions(ide_hwif_t *hwif)
 388 {
 389         unsigned long addr;
 390         unsigned int i;
 391
 392         if (hwif->mmio == 2)
 393                 return 0;
 394         BUG_ON(hwif->mmio == 1);
 395         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
 396         if (addr && !hwif_request_region(hwif, addr, 1))
 397                 goto control_region_busy;
 398         hwif->straight8 = 0;
 399         addr = hwif->io_ports[IDE_DATA_OFFSET];
 400         if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
 401                 if (!hwif_request_region(hwif, addr, 8))
 402                         goto data_region_busy;
 403                 hwif->straight8 = 1;
 404                 return 0;
 405         }
 406         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
 407                 addr = hwif->io_ports[i];
 408                 if (!hwif_request_region(hwif, addr, 1)) {
 409                         while (--i)
 410                                 release_region(addr, 1);
 411                         goto data_region_busy;
 412                 }
 413         }
 414         return 0;
 415
 416 data_region_busy:
 417         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
 418         if (addr)
 419                 release_region(addr, 1);
 420 control_region_busy:
 421         /* If any errors are return, we drop the hwif interface. */
 422         return -EBUSY;
 423 }
 424
 425 /**
 426  *      ide_hwif_release_regions - free IDE resources
 427  *
 428  *      Note that we only release the standard ports,
 429  *      and do not even try to handle any extra ports
 430  *      allocated for weird IDE interface chipsets.
 431  *
 432  *      Note also that we don't yet handle mmio resources here. More
 433  *      importantly our caller should be doing this so we need to
 434  *      restructure this as a helper function for drivers.
 435  */
 436
 437 void ide_hwif_release_regions(ide_hwif_t *hwif)
 438 {
 439         u32 i = 0;
 440
 441         if (hwif->mmio == 2)
 442                 return;
 443         if (hwif->io_ports[IDE_CONTROL_OFFSET])
 444                 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
 445         if (hwif->straight8) {
 446                 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
 447                 return;
 448         }
 449         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
 450                 if (hwif->io_ports[i])
 451                         release_region(hwif->io_ports[i], 1);
 452 }
 453
 454 /**
 455  *      ide_hwif_restore        -       restore hwif to template
 456  *      @hwif: hwif to update
 457  *      @tmp_hwif: template
 458  *
 459  *      Restore hwif to a previous state by copying most settings
 460  *      from the template.
 461  */
 462
 463 static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
 464 {
 465         hwif->hwgroup                   = tmp_hwif->hwgroup;
 466
 467         hwif->gendev.parent             = tmp_hwif->gendev.parent;
 468
 469         hwif->proc                      = tmp_hwif->proc;
 470
 471         hwif->major                     = tmp_hwif->major;
 472         hwif->straight8                 = tmp_hwif->straight8;
 473         hwif->bus_state                 = tmp_hwif->bus_state;
 474
 475         hwif->atapi_dma                 = tmp_hwif->atapi_dma;
 476         hwif->ultra_mask                = tmp_hwif->ultra_mask;
 477         hwif->mwdma_mask                = tmp_hwif->mwdma_mask;
 478         hwif->swdma_mask                = tmp_hwif->swdma_mask;
 479
 480         hwif->chipset                   = tmp_hwif->chipset;
 481         hwif->hold                      = tmp_hwif->hold;
 482
 483 #ifdef CONFIG_BLK_DEV_IDEPCI
 484         hwif->pci_dev                   = tmp_hwif->pci_dev;
 485         hwif->cds                       = tmp_hwif->cds;
 486 #endif
 487
 488         hwif->tuneproc                  = tmp_hwif->tuneproc;
 489         hwif->speedproc                 = tmp_hwif->speedproc;
 490         hwif->selectproc                = tmp_hwif->selectproc;
 491         hwif->reset_poll                = tmp_hwif->reset_poll;
 492         hwif->pre_reset                 = tmp_hwif->pre_reset;
 493         hwif->resetproc                 = tmp_hwif->resetproc;
 494         hwif->intrproc                  = tmp_hwif->intrproc;
 495         hwif->maskproc                  = tmp_hwif->maskproc;
 496         hwif->quirkproc                 = tmp_hwif->quirkproc;
 497         hwif->busproc                   = tmp_hwif->busproc;
 498
 499         hwif->ata_input_data            = tmp_hwif->ata_input_data;
 500         hwif->ata_output_data           = tmp_hwif->ata_output_data;
 501         hwif->atapi_input_bytes         = tmp_hwif->atapi_input_bytes;
 502         hwif->atapi_output_bytes        = tmp_hwif->atapi_output_bytes;
 503
 504         hwif->dma_setup                 = tmp_hwif->dma_setup;
 505         hwif->dma_exec_cmd              = tmp_hwif->dma_exec_cmd;
 506         hwif->dma_start                 = tmp_hwif->dma_start;
 507         hwif->ide_dma_end               = tmp_hwif->ide_dma_end;
 508         hwif->ide_dma_check             = tmp_hwif->ide_dma_check;
 509         hwif->ide_dma_on                = tmp_hwif->ide_dma_on;
 510         hwif->ide_dma_off_quietly       = tmp_hwif->ide_dma_off_quietly;
 511         hwif->ide_dma_test_irq          = tmp_hwif->ide_dma_test_irq;
 512         hwif->ide_dma_clear_irq         = tmp_hwif->ide_dma_clear_irq;
 513         hwif->ide_dma_host_on           = tmp_hwif->ide_dma_host_on;
 514         hwif->ide_dma_host_off          = tmp_hwif->ide_dma_host_off;
 515         hwif->ide_dma_lostirq           = tmp_hwif->ide_dma_lostirq;
 516         hwif->ide_dma_timeout           = tmp_hwif->ide_dma_timeout;
 517
 518         hwif->OUTB                      = tmp_hwif->OUTB;
 519         hwif->OUTBSYNC                  = tmp_hwif->OUTBSYNC;
 520         hwif->OUTW                      = tmp_hwif->OUTW;
 521         hwif->OUTL                      = tmp_hwif->OUTL;
 522         hwif->OUTSW                     = tmp_hwif->OUTSW;
 523         hwif->OUTSL                     = tmp_hwif->OUTSL;
 524
 525         hwif->INB                       = tmp_hwif->INB;
 526         hwif->INW                       = tmp_hwif->INW;
 527         hwif->INL                       = tmp_hwif->INL;
 528         hwif->INSW                      = tmp_hwif->INSW;
 529         hwif->INSL                      = tmp_hwif->INSL;
 530
 531         hwif->sg_max_nents              = tmp_hwif->sg_max_nents;
 532
 533         hwif->mmio                      = tmp_hwif->mmio;
 534         hwif->rqsize                    = tmp_hwif->rqsize;
 535         hwif->no_lba48                  = tmp_hwif->no_lba48;
 536
 537 #ifndef CONFIG_BLK_DEV_IDECS
 538         hwif->irq                       = tmp_hwif->irq;
 539 #endif
 540
 541         hwif->dma_base                  = tmp_hwif->dma_base;
 542         hwif->dma_master                = tmp_hwif->dma_master;
 543         hwif->dma_command               = tmp_hwif->dma_command;
 544         hwif->dma_vendor1               = tmp_hwif->dma_vendor1;
 545         hwif->dma_status                = tmp_hwif->dma_status;
 546         hwif->dma_vendor3               = tmp_hwif->dma_vendor3;
 547         hwif->dma_prdtable              = tmp_hwif->dma_prdtable;
 548
 549         hwif->config_data               = tmp_hwif->config_data;
 550         hwif->select_data               = tmp_hwif->select_data;
 551         hwif->extra_base                = tmp_hwif->extra_base;
 552         hwif->extra_ports               = tmp_hwif->extra_ports;
 553         hwif->autodma                   = tmp_hwif->autodma;
 554         hwif->udma_four                 = tmp_hwif->udma_four;
 555         hwif->no_dsc                    = tmp_hwif->no_dsc;
 556
 557         hwif->hwif_data                 = tmp_hwif->hwif_data;
 558 }
 559
 560 /**
 561  *      ide_unregister          -       free an IDE interface
 562  *      @index: index of interface (will change soon to a pointer)
 563  *
 564  *      Perform the final unregister of an IDE interface. At the moment
 565  *      we don't refcount interfaces so this will also get split up.
 566  *
 567  *      Locking:
 568  *      The caller must not hold the IDE locks
 569  *      The drive present/vanishing is not yet properly locked
 570  *      Take care with the callbacks. These have been split to avoid
 571  *      deadlocking the IDE layer. The shutdown callback is called
 572  *      before we take the lock and free resources. It is up to the
 573  *      caller to be sure there is no pending I/O here, and that
 574  *      the interface will not be reopened (present/vanishing locking
 575  *      isn't yet done BTW). After we commit to the final kill we
 576  *      call the cleanup callback with the ide locks held.
 577  *
 578  *      Unregister restores the hwif structures to the default state.
 579  *      This is raving bonkers.
 580  */
 581
 582 void ide_unregister(unsigned int index)
 583 {
 584         ide_drive_t *drive;
 585         ide_hwif_t *hwif, *g;
 586         static ide_hwif_t tmp_hwif; /* protected by ide_cfg_sem */
 587         ide_hwgroup_t *hwgroup;
 588         int irq_count = 0, unit;
 589
 590         BUG_ON(index >= MAX_HWIFS);
 591
 592         BUG_ON(in_interrupt());
 593         BUG_ON(irqs_disabled());
 594         down(&ide_cfg_sem);
 595         spin_lock_irq(&ide_lock);
 596         hwif = &ide_hwifs[index];
 597         if (!hwif->present)
 598                 goto abort;
 599         for (unit = 0; unit < MAX_DRIVES; ++unit) {
 600                 drive = &hwif->drives[unit];
 601                 if (!drive->present)
 602                         continue;
 603                 spin_unlock_irq(&ide_lock);
 604                 device_unregister(&drive->gendev);
 605                 wait_for_completion(&drive->gendev_rel_comp);
 606                 spin_lock_irq(&ide_lock);
 607         }
 608         hwif->present = 0;
 609
 610         spin_unlock_irq(&ide_lock);
 611
 612         destroy_proc_ide_interface(hwif);
 613
 614         hwgroup = hwif->hwgroup;
 615         /*
 616          * free the irq if we were the only hwif using it
 617          */
 618         g = hwgroup->hwif;
 619         do {
 620                 if (g->irq == hwif->irq)
 621                         ++irq_count;
 622                 g = g->next;
 623         } while (g != hwgroup->hwif);
 624         if (irq_count == 1)
 625                 free_irq(hwif->irq, hwgroup);
 626
 627         spin_lock_irq(&ide_lock);
 628         /*
 629          * Note that we only release the standard ports,
 630          * and do not even try to handle any extra ports
 631          * allocated for weird IDE interface chipsets.
 632          */
 633         ide_hwif_release_regions(hwif);
 634
 635         /*
 636          * Remove us from the hwgroup, and free
 637          * the hwgroup if we were the only member
 638          */
 639         if (hwif->next == hwif) {
 640                 BUG_ON(hwgroup->hwif != hwif);
 641                 kfree(hwgroup);
 642         } else {
 643                 /* There is another interface in hwgroup.
 644                  * Unlink us, and set hwgroup->drive and ->hwif to
 645                  * something sane.
 646                  */
 647                 g = hwgroup->hwif;
 648                 while (g->next != hwif)
 649                         g = g->next;
 650                 g->next = hwif->next;
 651                 if (hwgroup->hwif == hwif) {
 652                         /* Chose a random hwif for hwgroup->hwif.
 653                          * It's guaranteed that there are no drives
 654                          * left in the hwgroup.
 655                          */
 656                         BUG_ON(hwgroup->drive != NULL);
 657                         hwgroup->hwif = g;
 658                 }
 659                 BUG_ON(hwgroup->hwif == hwif);
 660         }
 661
 662         /* More messed up locking ... */
 663         spin_unlock_irq(&ide_lock);
 664         device_unregister(&hwif->gendev);
 665         wait_for_completion(&hwif->gendev_rel_comp);
 666
 667         /*
 668          * Remove us from the kernel's knowledge
 669          */
 670         blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
 671         kfree(hwif->sg_table);
 672         unregister_blkdev(hwif->major, hwif->name);
 673         spin_lock_irq(&ide_lock);
 674
 675         if (hwif->dma_base) {
 676                 (void) ide_release_dma(hwif);
 677
 678                 hwif->dma_base = 0;
 679                 hwif->dma_master = 0;
 680                 hwif->dma_command = 0;
 681                 hwif->dma_vendor1 = 0;
 682                 hwif->dma_status = 0;
 683                 hwif->dma_vendor3 = 0;
 684                 hwif->dma_prdtable = 0;
 685
 686                 hwif->extra_base  = 0;
 687                 hwif->extra_ports = 0;
 688         }
 689
 690         /* copy original settings */
 691         tmp_hwif = *hwif;
 692
 693         /* restore hwif data to pristine status */
 694         init_hwif_data(hwif, index);
 695         init_hwif_default(hwif, index);
 696
 697         ide_hwif_restore(hwif, &tmp_hwif);
 698
 699 abort:
 700         spin_unlock_irq(&ide_lock);
 701         up(&ide_cfg_sem);
 702 }
 703
 704 EXPORT_SYMBOL(ide_unregister);
 705
 706
 707 /**
 708  *      ide_setup_ports         -       set up IDE interface ports
 709  *      @hw: register descriptions
 710  *      @base: base register
 711  *      @offsets: table of register offsets
 712  *      @ctrl: control register
 713  *      @ack_irq: IRQ ack
 714  *      @irq: interrupt lie
 715  *
 716  *      Setup hw_regs_t structure described by parameters.  You
 717  *      may set up the hw structure yourself OR use this routine to
 718  *      do it for you. This is basically a helper
 719  *
 720  */
 721
 722 void ide_setup_ports (  hw_regs_t *hw,
 723                         unsigned long base, int *offsets,
 724                         unsigned long ctrl, unsigned long intr,
 725                         ide_ack_intr_t *ack_intr,
 726 /*
 727  *                      ide_io_ops_t *iops,
 728  */
 729                         int irq)
 730 {
 731         int i;
 732
 733         memset(hw, 0, sizeof(hw_regs_t));
 734         for (i = 0; i < IDE_NR_PORTS; i++) {
 735                 if (offsets[i] == -1) {
 736                         switch(i) {
 737                                 case IDE_CONTROL_OFFSET:
 738                                         hw->io_ports[i] = ctrl;
 739                                         break;
 740 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
 741                                 case IDE_IRQ_OFFSET:
 742                                         hw->io_ports[i] = intr;
 743                                         break;
 744 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
 745                                 default:
 746                                         hw->io_ports[i] = 0;
 747                                         break;
 748                         }
 749                 } else {
 750                         hw->io_ports[i] = base + offsets[i];
 751                 }
 752         }
 753         hw->irq = irq;
 754         hw->dma = NO_DMA;
 755         hw->ack_intr = ack_intr;
 756 /*
 757  *      hw->iops = iops;
 758  */
 759 }
 760
 761 /**
 762  *      ide_register_hw_with_fixup      -       register IDE interface
 763  *      @hw: hardware registers
 764  *      @hwifp: pointer to returned hwif
 765  *      @fixup: fixup function
 766  *
 767  *      Register an IDE interface, specifying exactly the registers etc.
 768  *      Set init=1 iff calling before probes have taken place.
 769  *
 770  *      Returns -1 on error.
 771  */
 772
 773 int ide_register_hw_with_fixup(hw_regs_t *hw, ide_hwif_t **hwifp, void(*fixup)(ide_hwif_t *hwif))
 774 {
 775         int index, retry = 1;
 776         ide_hwif_t *hwif;
 777
 778         do {
 779                 for (index = 0; index < MAX_HWIFS; ++index) {
 780                         hwif = &ide_hwifs[index];
 781                         if (hwif->hw.io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
 782                                 goto found;
 783                 }
 784                 for (index = 0; index < MAX_HWIFS; ++index) {
 785                         hwif = &ide_hwifs[index];
 786                         if (hwif->hold)
 787                                 continue;
 788                         if ((!hwif->present && !hwif->mate && !initializing) ||
 789                             (!hwif->hw.io_ports[IDE_DATA_OFFSET] && initializing))
 790                                 goto found;
 791                 }
 792                 for (index = 0; index < MAX_HWIFS; index++)
 793                         ide_unregister(index);
 794         } while (retry--);
 795         return -1;
 796 found:
 797         if (hwif->present)
 798                 ide_unregister(index);
 799         else if (!hwif->hold) {
 800                 init_hwif_data(hwif, index);
 801                 init_hwif_default(hwif, index);
 802         }
 803         if (hwif->present)
 804                 return -1;
 805         memcpy(&hwif->hw, hw, sizeof(*hw));
 806         memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports));
 807         hwif->irq = hw->irq;
 808         hwif->noprobe = 0;
 809         hwif->chipset = hw->chipset;
 810         hwif->gendev.parent = hw->dev;
 811
 812         if (!initializing) {
 813                 probe_hwif_init_with_fixup(hwif, fixup);
 814                 create_proc_ide_interfaces();
 815         }
 816
 817         if (hwifp)
 818                 *hwifp = hwif;
 819
 820         return (initializing || hwif->present) ? index : -1;
 821 }
 822
 823 EXPORT_SYMBOL(ide_register_hw_with_fixup);
 824
 825 int ide_register_hw(hw_regs_t *hw, ide_hwif_t **hwifp)
 826 {
 827         return ide_register_hw_with_fixup(hw, hwifp, NULL);
 828 }
 829
 830 EXPORT_SYMBOL(ide_register_hw);
 831
 832 /*
 833  *      Locks for IDE setting functionality
 834  */
 835
 836 DECLARE_MUTEX(ide_setting_sem);
 837
 838 /**
 839  *      __ide_add_setting       -       add an ide setting option
 840  *      @drive: drive to use
 841  *      @name: setting name
 842  *      @rw: true if the function is read write
 843  *      @read_ioctl: function to call on read
 844  *      @write_ioctl: function to call on write
 845  *      @data_type: type of data
 846  *      @min: range minimum
 847  *      @max: range maximum
 848  *      @mul_factor: multiplication scale
 849  *      @div_factor: divison scale
 850  *      @data: private data field
 851  *      @set: setting
 852  *      @auto_remove: setting auto removal flag
 853  *
 854  *      Removes the setting named from the device if it is present.
 855  *      The function takes the settings_lock to protect against
 856  *      parallel changes. This function must not be called from IRQ
 857  *      context. Returns 0 on success or -1 on failure.
 858  *
 859  *      BUGS: This code is seriously over-engineered. There is also
 860  *      magic about how the driver specific features are setup. If
 861  *      a driver is attached we assume the driver settings are auto
 862  *      remove.
 863  */
 864
 865 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)
 866 {
 867         ide_settings_t **p = (ide_settings_t **) &drive->settings, *setting = NULL;
 868
 869         down(&ide_setting_sem);
 870         while ((*p) && strcmp((*p)->name, name) < 0)
 871                 p = &((*p)->next);
 872         if ((setting = kzalloc(sizeof(*setting), GFP_KERNEL)) == NULL)
 873                 goto abort;
 874         if ((setting->name = kmalloc(strlen(name) + 1, GFP_KERNEL)) == NULL)
 875                 goto abort;
 876         strcpy(setting->name, name);
 877         setting->rw = rw;
 878         setting->read_ioctl = read_ioctl;
 879         setting->write_ioctl = write_ioctl;
 880         setting->data_type = data_type;
 881         setting->min = min;
 882         setting->max = max;
 883         setting->mul_factor = mul_factor;
 884         setting->div_factor = div_factor;
 885         setting->data = data;
 886         setting->set = set;
 887
 888         setting->next = *p;
 889         if (auto_remove)
 890                 setting->auto_remove = 1;
 891         *p = setting;
 892         up(&ide_setting_sem);
 893         return 0;
 894 abort:
 895         up(&ide_setting_sem);
 896         kfree(setting);
 897         return -1;
 898 }
 899
 900 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)
 901 {
 902         return __ide_add_setting(drive, name, rw, read_ioctl, write_ioctl, data_type, min, max, mul_factor, div_factor, data, set, 1);
 903 }
 904
 905 EXPORT_SYMBOL(ide_add_setting);
 906
 907 /**
 908  *      __ide_remove_setting    -       remove an ide setting option
 909  *      @drive: drive to use
 910  *      @name: setting name
 911  *
 912  *      Removes the setting named from the device if it is present.
 913  *      The caller must hold the setting semaphore.
 914  */
 915
 916 static void __ide_remove_setting (ide_drive_t *drive, char *name)
 917 {
 918         ide_settings_t **p, *setting;
 919
 920         p = (ide_settings_t **) &drive->settings;
 921
 922         while ((*p) && strcmp((*p)->name, name))
 923                 p = &((*p)->next);
 924         if ((setting = (*p)) == NULL)
 925                 return;
 926
 927         (*p) = setting->next;
 928
 929         kfree(setting->name);
 930         kfree(setting);
 931 }
 932
 933 /**
 934  *      ide_find_setting_by_ioctl       -       find a drive specific ioctl
 935  *      @drive: drive to scan
 936  *      @cmd: ioctl command to handle
 937  *
 938  *      Scan's the device setting table for a matching entry and returns
 939  *      this or NULL if no entry is found. The caller must hold the
 940  *      setting semaphore
 941  */
 942
 943 static ide_settings_t *ide_find_setting_by_ioctl (ide_drive_t *drive, int cmd)
 944 {
 945         ide_settings_t *setting = drive->settings;
 946
 947         while (setting) {
 948                 if (setting->read_ioctl == cmd || setting->write_ioctl == cmd)
 949                         break;
 950                 setting = setting->next;
 951         }
 952
 953         return setting;
 954 }
 955
 956 /**
 957  *      ide_find_setting_by_name        -       find a drive specific setting
 958  *      @drive: drive to scan
 959  *      @name: setting name
 960  *
 961  *      Scan's the device setting table for a matching entry and returns
 962  *      this or NULL if no entry is found. The caller must hold the
 963  *      setting semaphore
 964  */
 965
 966 ide_settings_t *ide_find_setting_by_name (ide_drive_t *drive, char *name)
 967 {
 968         ide_settings_t *setting = drive->settings;
 969
 970         while (setting) {
 971                 if (strcmp(setting->name, name) == 0)
 972                         break;
 973                 setting = setting->next;
 974         }
 975         return setting;
 976 }
 977
 978 /**
 979  *      auto_remove_settings    -       remove driver specific settings
 980  *      @drive: drive
 981  *
 982  *      Automatically remove all the driver specific settings for this
 983  *      drive. This function may not be called from IRQ context. The
 984  *      caller must hold ide_setting_sem.
 985  */
 986
 987 static void auto_remove_settings (ide_drive_t *drive)
 988 {
 989         ide_settings_t *setting;
 990 repeat:
 991         setting = drive->settings;
 992         while (setting) {
 993                 if (setting->auto_remove) {
 994                         __ide_remove_setting(drive, setting->name);
 995                         goto repeat;
 996                 }
 997                 setting = setting->next;
 998         }
 999 }
1000
1001 /**
1002  *      ide_read_setting        -       read an IDE setting
1003  *      @drive: drive to read from
1004  *      @setting: drive setting
1005  *
1006  *      Read a drive setting and return the value. The caller
1007  *      must hold the ide_setting_sem when making this call.
1008  *
1009  *      BUGS: the data return and error are the same return value
1010  *      so an error -EINVAL and true return of the same value cannot
1011  *      be told apart
1012  */
1013
1014 int ide_read_setting (ide_drive_t *drive, ide_settings_t *setting)
1015 {
1016         int             val = -EINVAL;
1017         unsigned long   flags;
1018
1019         if ((setting->rw & SETTING_READ)) {
1020                 spin_lock_irqsave(&ide_lock, flags);
1021                 switch(setting->data_type) {
1022                         case TYPE_BYTE:
1023                                 val = *((u8 *) setting->data);
1024                                 break;
1025                         case TYPE_SHORT:
1026                                 val = *((u16 *) setting->data);
1027                                 break;
1028                         case TYPE_INT:
1029                         case TYPE_INTA:
1030                                 val = *((u32 *) setting->data);
1031                                 break;
1032                 }
1033                 spin_unlock_irqrestore(&ide_lock, flags);
1034         }
1035         return val;
1036 }
1037
1038 /**
1039  *      ide_spin_wait_hwgroup   -       wait for group
1040  *      @drive: drive in the group
1041  *
1042  *      Wait for an IDE device group to go non busy and then return
1043  *      holding the ide_lock which guards the hwgroup->busy status
1044  *      and right to use it.
1045  */
1046
1047 int ide_spin_wait_hwgroup (ide_drive_t *drive)
1048 {
1049         ide_hwgroup_t *hwgroup = HWGROUP(drive);
1050         unsigned long timeout = jiffies + (3 * HZ);
1051
1052         spin_lock_irq(&ide_lock);
1053
1054         while (hwgroup->busy) {
1055                 unsigned long lflags;
1056                 spin_unlock_irq(&ide_lock);
1057                 local_irq_set(lflags);
1058                 if (time_after(jiffies, timeout)) {
1059                         local_irq_restore(lflags);
1060                         printk(KERN_ERR "%s: channel busy\n", drive->name);
1061                         return -EBUSY;
1062                 }
1063                 local_irq_restore(lflags);
1064                 spin_lock_irq(&ide_lock);
1065         }
1066         return 0;
1067 }
1068
1069 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
1070
1071 /**
1072  *      ide_write_setting       -       read an IDE setting
1073  *      @drive: drive to read from
1074  *      @setting: drive setting
1075  *      @val: value
1076  *
1077  *      Write a drive setting if it is possible. The caller
1078  *      must hold the ide_setting_sem when making this call.
1079  *
1080  *      BUGS: the data return and error are the same return value
1081  *      so an error -EINVAL and true return of the same value cannot
1082  *      be told apart
1083  *
1084  *      FIXME:  This should be changed to enqueue a special request
1085  *      to the driver to change settings, and then wait on a sema for completion.
1086  *      The current scheme of polling is kludgy, though safe enough.
1087  */
1088
1089 int ide_write_setting (ide_drive_t *drive, ide_settings_t *setting, int val)
1090 {
1091         int i;
1092         u32 *p;
1093
1094         if (!capable(CAP_SYS_ADMIN))
1095                 return -EACCES;
1096         if (!(setting->rw & SETTING_WRITE))
1097                 return -EPERM;
1098         if (val < setting->min || val > setting->max)
1099                 return -EINVAL;
1100         if (setting->set)
1101                 return setting->set(drive, val);
1102         if (ide_spin_wait_hwgroup(drive))
1103                 return -EBUSY;
1104         switch (setting->data_type) {
1105                 case TYPE_BYTE:
1106                         *((u8 *) setting->data) = val;
1107                         break;
1108                 case TYPE_SHORT:
1109                         *((u16 *) setting->data) = val;
1110                         break;
1111                 case TYPE_INT:
1112                         *((u32 *) setting->data) = val;
1113                         break;
1114                 case TYPE_INTA:
1115                         p = (u32 *) setting->data;
1116                         for (i = 0; i < 1 << PARTN_BITS; i++, p++)
1117                                 *p = val;
1118                         break;
1119         }
1120         spin_unlock_irq(&ide_lock);
1121         return 0;
1122 }
1123
1124 static int set_io_32bit(ide_drive_t *drive, int arg)
1125 {
1126         drive->io_32bit = arg;
1127 #ifdef CONFIG_BLK_DEV_DTC2278
1128         if (HWIF(drive)->chipset == ide_dtc2278)
1129                 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
1130 #endif /* CONFIG_BLK_DEV_DTC2278 */
1131         return 0;
1132 }
1133
1134 static int set_using_dma (ide_drive_t *drive, int arg)
1135 {
1136 #ifdef CONFIG_BLK_DEV_IDEDMA
1137         if (!drive->id || !(drive->id->capability & 1))
1138                 return -EPERM;
1139         if (HWIF(drive)->ide_dma_check == NULL)
1140                 return -EPERM;
1141         if (arg) {
1142                 if (HWIF(drive)->ide_dma_check(drive)) return -EIO;
1143                 if (HWIF(drive)->ide_dma_on(drive)) return -EIO;
1144         } else {
1145                 if (__ide_dma_off(drive))
1146                         return -EIO;
1147         }
1148         return 0;
1149 #else
1150         return -EPERM;
1151 #endif
1152 }
1153
1154 static int set_pio_mode (ide_drive_t *drive, int arg)
1155 {
1156         struct request rq;
1157
1158         if (!HWIF(drive)->tuneproc)
1159                 return -ENOSYS;
1160         if (drive->special.b.set_tune)
1161                 return -EBUSY;
1162         ide_init_drive_cmd(&rq);
1163         drive->tune_req = (u8) arg;
1164         drive->special.b.set_tune = 1;
1165         (void) ide_do_drive_cmd(drive, &rq, ide_wait);
1166         return 0;
1167 }
1168
1169 static int set_xfer_rate (ide_drive_t *drive, int arg)
1170 {
1171         int err = ide_wait_cmd(drive,
1172                         WIN_SETFEATURES, (u8) arg,
1173                         SETFEATURES_XFER, 0, NULL);
1174
1175         if (!err && arg) {
1176                 ide_set_xfer_rate(drive, (u8) arg);
1177                 ide_driveid_update(drive);
1178         }
1179         return err;
1180 }
1181
1182 /**
1183  *      ide_add_generic_settings        -       generic ide settings
1184  *      @drive: drive being configured
1185  *
1186  *      Add the generic parts of the system settings to the /proc files and
1187  *      ioctls for this IDE device. The caller must not be holding the
1188  *      ide_setting_sem.
1189  */
1190
1191 void ide_add_generic_settings (ide_drive_t *drive)
1192 {
1193 /*
1194  *                        drive         setting name            read/write access                               read ioctl              write ioctl             data type       min     max                             mul_factor      div_factor      data pointer                    set function
1195  */
1196         __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);
1197         __ide_add_setting(drive,        "keepsettings",         SETTING_RW,                                     HDIO_GET_KEEPSETTINGS,  HDIO_SET_KEEPSETTINGS,  TYPE_BYTE,      0,      1,                              1,              1,              &drive->keep_settings,          NULL,           0);
1198         __ide_add_setting(drive,        "nice1",                SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->nice1,                  NULL,           0);
1199         __ide_add_setting(drive,        "pio_mode",             SETTING_WRITE,                                  -1,                     HDIO_SET_PIO_MODE,      TYPE_BYTE,      0,      255,                            1,              1,              NULL,                           set_pio_mode,   0);
1200         __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);
1201         __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);
1202         __ide_add_setting(drive,        "init_speed",           SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->init_speed,             NULL,           0);
1203         __ide_add_setting(drive,        "current_speed",        SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->current_speed,          set_xfer_rate,  0);
1204         __ide_add_setting(drive,        "number",               SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      3,                              1,              1,              &drive->dn,                     NULL,           0);
1205 }
1206
1207 /**
1208  *      system_bus_clock        -       clock guess
1209  *
1210  *      External version of the bus clock guess used by very old IDE drivers
1211  *      for things like VLB timings. Should not be used.
1212  */
1213
1214 int system_bus_clock (void)
1215 {
1216         return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
1217 }
1218
1219 EXPORT_SYMBOL(system_bus_clock);
1220
1221 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
1222 {
1223         ide_drive_t *drive = dev->driver_data;
1224         ide_hwif_t *hwif = HWIF(drive);
1225         struct request rq;
1226         struct request_pm_state rqpm;
1227         ide_task_t args;
1228
1229         /* Call ACPI _GTM only once */
1230         if (!(drive->dn % 2))
1231                 ide_acpi_get_timing(hwif);
1232
1233         memset(&rq, 0, sizeof(rq));
1234         memset(&rqpm, 0, sizeof(rqpm));
1235         memset(&args, 0, sizeof(args));
1236         rq.cmd_type = REQ_TYPE_PM_SUSPEND;
1237         rq.special = &args;
1238         rq.data = &rqpm;
1239         rqpm.pm_step = ide_pm_state_start_suspend;
1240         if (mesg.event == PM_EVENT_PRETHAW)
1241                 mesg.event = PM_EVENT_FREEZE;
1242         rqpm.pm_state = mesg.event;
1243
1244         return ide_do_drive_cmd(drive, &rq, ide_wait);
1245 }
1246
1247 static int generic_ide_resume(struct device *dev)
1248 {
1249         ide_drive_t *drive = dev->driver_data;
1250         ide_hwif_t *hwif = HWIF(drive);
1251         struct request rq;
1252         struct request_pm_state rqpm;
1253         ide_task_t args;
1254
1255         /* Call ACPI _STM only once */
1256         if (!(drive->dn % 2))
1257                 ide_acpi_push_timing(hwif);
1258
1259         ide_acpi_exec_tfs(drive);
1260
1261         memset(&rq, 0, sizeof(rq));
1262         memset(&rqpm, 0, sizeof(rqpm));
1263         memset(&args, 0, sizeof(args));
1264         rq.cmd_type = REQ_TYPE_PM_RESUME;
1265         rq.special = &args;
1266         rq.data = &rqpm;
1267         rqpm.pm_step = ide_pm_state_start_resume;
1268         rqpm.pm_state = PM_EVENT_ON;
1269
1270         return ide_do_drive_cmd(drive, &rq, ide_head_wait);
1271 }
1272
1273 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
1274                         unsigned int cmd, unsigned long arg)
1275 {
1276         ide_settings_t *setting;
1277         ide_driver_t *drv;
1278         int err = 0;
1279         void __user *p = (void __user *)arg;
1280
1281         down(&ide_setting_sem);
1282         if ((setting = ide_find_setting_by_ioctl(drive, cmd)) != NULL) {
1283                 if (cmd == setting->read_ioctl) {
1284                         err = ide_read_setting(drive, setting);
1285                         up(&ide_setting_sem);
1286                         return err >= 0 ? put_user(err, (long __user *)arg) : err;
1287                 } else {
1288                         if (bdev != bdev->bd_contains)
1289                                 err = -EINVAL;
1290                         else
1291                                 err = ide_write_setting(drive, setting, arg);
1292                         up(&ide_setting_sem);
1293                         return err;
1294                 }
1295         }
1296         up(&ide_setting_sem);
1297
1298         switch (cmd) {
1299                 case HDIO_OBSOLETE_IDENTITY:
1300                 case HDIO_GET_IDENTITY:
1301                         if (bdev != bdev->bd_contains)
1302                                 return -EINVAL;
1303                         if (drive->id_read == 0)
1304                                 return -ENOMSG;
1305                         if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1306                                 return -EFAULT;
1307                         return 0;
1308
1309                 case HDIO_GET_NICE:
1310                         return put_user(drive->dsc_overlap      <<      IDE_NICE_DSC_OVERLAP    |
1311                                         drive->atapi_overlap    <<      IDE_NICE_ATAPI_OVERLAP  |
1312                                         drive->nice0            <<      IDE_NICE_0              |
1313                                         drive->nice1            <<      IDE_NICE_1              |
1314                                         drive->nice2            <<      IDE_NICE_2,
1315                                         (long __user *) arg);
1316
1317 #ifdef CONFIG_IDE_TASK_IOCTL
1318                 case HDIO_DRIVE_TASKFILE:
1319                         if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1320                                 return -EACCES;
1321                         switch(drive->media) {
1322                                 case ide_disk:
1323                                         return ide_taskfile_ioctl(drive, cmd, arg);
1324                                 default:
1325                                         return -ENOMSG;
1326                         }
1327 #endif /* CONFIG_IDE_TASK_IOCTL */
1328
1329                 case HDIO_DRIVE_CMD:
1330                         if (!capable(CAP_SYS_RAWIO))
1331                                 return -EACCES;
1332                         return ide_cmd_ioctl(drive, cmd, arg);
1333
1334                 case HDIO_DRIVE_TASK:
1335                         if (!capable(CAP_SYS_RAWIO))
1336                                 return -EACCES;
1337                         return ide_task_ioctl(drive, cmd, arg);
1338
1339                 case HDIO_SCAN_HWIF:
1340                 {
1341                         hw_regs_t hw;
1342                         int args[3];
1343                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1344                         if (copy_from_user(args, p, 3 * sizeof(int)))
1345                                 return -EFAULT;
1346                         memset(&hw, 0, sizeof(hw));
1347                         ide_init_hwif_ports(&hw, (unsigned long) args[0],
1348                                             (unsigned long) args[1], NULL);
1349                         hw.irq = args[2];
1350                         if (ide_register_hw(&hw, NULL) == -1)
1351                                 return -EIO;
1352                         return 0;
1353                 }
1354                 case HDIO_UNREGISTER_HWIF:
1355                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1356                         /* (arg > MAX_HWIFS) checked in function */
1357                         ide_unregister(arg);
1358                         return 0;
1359                 case HDIO_SET_NICE:
1360                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1361                         if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1362                                 return -EPERM;
1363                         drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1364                         drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1365                         if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1366                                 drive->dsc_overlap = 0;
1367                                 return -EPERM;
1368                         }
1369                         drive->nice1 = (arg >> IDE_NICE_1) & 1;
1370                         return 0;
1371                 case HDIO_DRIVE_RESET:
1372                 {
1373                         unsigned long flags;
1374                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1375
1376                         /*
1377                          *      Abort the current command on the
1378                          *      group if there is one, taking
1379                          *      care not to allow anything else
1380                          *      to be queued and to die on the
1381                          *      spot if we miss one somehow
1382                          */
1383
1384                         spin_lock_irqsave(&ide_lock, flags);
1385
1386                         if (HWGROUP(drive)->resetting) {
1387                                 spin_unlock_irqrestore(&ide_lock, flags);
1388                                 return -EBUSY;
1389                         }
1390
1391                         ide_abort(drive, "drive reset");
1392
1393                         BUG_ON(HWGROUP(drive)->handler);
1394
1395                         /* Ensure nothing gets queued after we
1396                            drop the lock. Reset will clear the busy */
1397
1398                         HWGROUP(drive)->busy = 1;
1399                         spin_unlock_irqrestore(&ide_lock, flags);
1400                         (void) ide_do_reset(drive);
1401
1402                         return 0;
1403                 }
1404
1405                 case CDROMEJECT:
1406                 case CDROMCLOSETRAY:
1407                         return scsi_cmd_ioctl(file, bdev->bd_disk, cmd, p);
1408
1409                 case HDIO_GET_BUSSTATE:
1410                         if (!capable(CAP_SYS_ADMIN))
1411                                 return -EACCES;
1412                         if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1413                                 return -EFAULT;
1414                         return 0;
1415
1416                 case HDIO_SET_BUSSTATE:
1417                         if (!capable(CAP_SYS_ADMIN))
1418                                 return -EACCES;
1419                         if (HWIF(drive)->busproc)
1420                                 return HWIF(drive)->busproc(drive, (int)arg);
1421                         return -EOPNOTSUPP;
1422                 default:
1423                         return -EINVAL;
1424         }
1425 }
1426
1427 EXPORT_SYMBOL(generic_ide_ioctl);
1428
1429 /*
1430  * stridx() returns the offset of c within s,
1431  * or -1 if c is '\0' or not found within s.
1432  */
1433 static int __init stridx (const char *s, char c)
1434 {
1435         char *i = strchr(s, c);
1436         return (i && c) ? i - s : -1;
1437 }
1438
1439 /*
1440  * match_parm() does parsing for ide_setup():
1441  *
1442  * 1. the first char of s must be '='.
1443  * 2. if the remainder matches one of the supplied keywords,
1444  *     the index (1 based) of the keyword is negated and returned.
1445  * 3. if the remainder is a series of no more than max_vals numbers
1446  *     separated by commas, the numbers are saved in vals[] and a
1447  *     count of how many were saved is returned.  Base10 is assumed,
1448  *     and base16 is allowed when prefixed with "0x".
1449  * 4. otherwise, zero is returned.
1450  */
1451 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1452 {
1453         static const char *decimal = "0123456789";
1454         static const char *hex = "0123456789abcdef";
1455         int i, n;
1456
1457         if (*s++ == '=') {
1458                 /*
1459                  * Try matching against the supplied keywords,
1460                  * and return -(index+1) if we match one
1461                  */
1462                 if (keywords != NULL) {
1463                         for (i = 0; *keywords != NULL; ++i) {
1464                                 if (!strcmp(s, *keywords++))
1465                                         return -(i+1);
1466                         }
1467                 }
1468                 /*
1469                  * Look for a series of no more than "max_vals"
1470                  * numeric values separated by commas, in base10,
1471                  * or base16 when prefixed with "0x".
1472                  * Return a count of how many were found.
1473                  */
1474                 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1475                         vals[n] = i;
1476                         while ((i = stridx(decimal, *++s)) >= 0)
1477                                 vals[n] = (vals[n] * 10) + i;
1478                         if (*s == 'x' && !vals[n]) {
1479                                 while ((i = stridx(hex, *++s)) >= 0)
1480                                         vals[n] = (vals[n] * 0x10) + i;
1481                         }
1482                         if (++n == max_vals)
1483                                 break;
1484                         if (*s == ',' || *s == ';')
1485                                 ++s;
1486                 }
1487                 if (!*s)
1488                         return n;
1489         }
1490         return 0;       /* zero = nothing matched */
1491 }
1492
1493 #ifdef CONFIG_BLK_DEV_ALI14XX
1494 static int __initdata probe_ali14xx;
1495 extern int ali14xx_init(void);
1496 #endif
1497 #ifdef CONFIG_BLK_DEV_UMC8672
1498 static int __initdata probe_umc8672;
1499 extern int umc8672_init(void);
1500 #endif
1501 #ifdef CONFIG_BLK_DEV_DTC2278
1502 static int __initdata probe_dtc2278;
1503 extern int dtc2278_init(void);
1504 #endif
1505 #ifdef CONFIG_BLK_DEV_HT6560B
1506 static int __initdata probe_ht6560b;
1507 extern int ht6560b_init(void);
1508 #endif
1509 #ifdef CONFIG_BLK_DEV_QD65XX
1510 static int __initdata probe_qd65xx;
1511 extern int qd65xx_init(void);
1512 #endif
1513
1514 static int __initdata is_chipset_set[MAX_HWIFS];
1515
1516 /*
1517  * ide_setup() gets called VERY EARLY during initialization,
1518  * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1519  *
1520  * Remember to update Documentation/ide.txt if you change something here.
1521  */
1522 static int __init ide_setup(char *s)
1523 {
1524         int i, vals[3];
1525         ide_hwif_t *hwif;
1526         ide_drive_t *drive;
1527         unsigned int hw, unit;
1528         const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1529         const char max_hwif  = '0' + (MAX_HWIFS - 1);
1530
1531
1532         if (strncmp(s,"hd",2) == 0 && s[2] == '=')      /* hd= is for hd.c   */
1533                 return 0;                               /* driver and not us */
1534
1535         if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1536                 return 0;
1537
1538         printk(KERN_INFO "ide_setup: %s", s);
1539         init_ide_data ();
1540
1541 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1542         if (!strcmp(s, "ide=doubler")) {
1543                 extern int ide_doubler;
1544
1545                 printk(" : Enabled support for IDE doublers\n");
1546                 ide_doubler = 1;
1547                 return 1;
1548         }
1549 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1550
1551         if (!strcmp(s, "ide=nodma")) {
1552                 printk(" : Prevented DMA\n");
1553                 noautodma = 1;
1554                 return 1;
1555         }
1556
1557 #ifdef CONFIG_BLK_DEV_IDEPCI
1558         if (!strcmp(s, "ide=reverse")) {
1559                 ide_scan_direction = 1;
1560                 printk(" : Enabled support for IDE inverse scan order.\n");
1561                 return 1;
1562         }
1563 #endif /* CONFIG_BLK_DEV_IDEPCI */
1564
1565 #ifdef CONFIG_BLK_DEV_IDEACPI
1566         if (!strcmp(s, "ide=noacpi")) {
1567                 //printk(" : Disable IDE ACPI support.\n");
1568                 ide_noacpi = 1;
1569                 return 1;
1570         }
1571         if (!strcmp(s, "ide=acpigtf")) {
1572                 //printk(" : Enable IDE ACPI _GTF support.\n");
1573                 ide_noacpitfs = 0;
1574                 return 1;
1575         }
1576         if (!strcmp(s, "ide=acpionboot")) {
1577                 //printk(" : Call IDE ACPI methods on boot.\n");
1578                 ide_noacpionboot = 0;
1579                 return 1;
1580         }
1581 #endif /* CONFIG_BLK_DEV_IDEACPI */
1582
1583         /*
1584          * Look for drive options:  "hdx="
1585          */
1586         if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1587                 const char *hd_words[] = {
1588                         "none", "noprobe", "nowerr", "cdrom", "serialize",
1589                         "autotune", "noautotune", "minus8", "swapdata", "bswap",
1590                         "noflush", "remap", "remap63", "scsi", NULL };
1591                 unit = s[2] - 'a';
1592                 hw   = unit / MAX_DRIVES;
1593                 unit = unit % MAX_DRIVES;
1594                 hwif = &ide_hwifs[hw];
1595                 drive = &hwif->drives[unit];
1596                 if (strncmp(s + 4, "ide-", 4) == 0) {
1597                         strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1598                         goto done;
1599                 }
1600                 switch (match_parm(&s[3], hd_words, vals, 3)) {
1601                         case -1: /* "none" */
1602                         case -2: /* "noprobe" */
1603                                 drive->noprobe = 1;
1604                                 goto done;
1605                         case -3: /* "nowerr" */
1606                                 drive->bad_wstat = BAD_R_STAT;
1607                                 hwif->noprobe = 0;
1608                                 goto done;
1609                         case -4: /* "cdrom" */
1610                                 drive->present = 1;
1611                                 drive->media = ide_cdrom;
1612                                 /* an ATAPI device ignores DRDY */
1613                                 drive->ready_stat = 0;
1614                                 hwif->noprobe = 0;
1615                                 goto done;
1616                         case -5: /* "serialize" */
1617                                 printk(" -- USE \"ide%d=serialize\" INSTEAD", hw);
1618                                 goto do_serialize;
1619                         case -6: /* "autotune" */
1620                                 drive->autotune = IDE_TUNE_AUTO;
1621                                 goto obsolete_option;
1622                         case -7: /* "noautotune" */
1623                                 drive->autotune = IDE_TUNE_NOAUTO;
1624                                 goto obsolete_option;
1625                         case -9: /* "swapdata" */
1626                         case -10: /* "bswap" */
1627                                 drive->bswap = 1;
1628                                 goto done;
1629                         case -11: /* noflush */
1630                                 drive->noflush = 1;
1631                                 goto done;
1632                         case -12: /* "remap" */
1633                                 drive->remap_0_to_1 = 1;
1634                                 goto done;
1635                         case -13: /* "remap63" */
1636                                 drive->sect0 = 63;
1637                                 goto done;
1638                         case -14: /* "scsi" */
1639                                 drive->scsi = 1;
1640                                 goto done;
1641                         case 3: /* cyl,head,sect */
1642                                 drive->media    = ide_disk;
1643                                 drive->ready_stat = READY_STAT;
1644                                 drive->cyl      = drive->bios_cyl  = vals[0];
1645                                 drive->head     = drive->bios_head = vals[1];
1646                                 drive->sect     = drive->bios_sect = vals[2];
1647                                 drive->present  = 1;
1648                                 drive->forced_geom = 1;
1649                                 hwif->noprobe = 0;
1650                                 goto done;
1651                         default:
1652                                 goto bad_option;
1653                 }
1654         }
1655
1656         if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1657                 goto bad_option;
1658         /*
1659          * Look for bus speed option:  "idebus="
1660          */
1661         if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1662                 if (match_parm(&s[6], NULL, vals, 1) != 1)
1663                         goto bad_option;
1664                 if (vals[0] >= 20 && vals[0] <= 66) {
1665                         idebus_parameter = vals[0];
1666                 } else
1667                         printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1668                 goto done;
1669         }
1670         /*
1671          * Look for interface options:  "idex="
1672          */
1673         if (s[3] >= '0' && s[3] <= max_hwif) {
1674                 /*
1675                  * Be VERY CAREFUL changing this: note hardcoded indexes below
1676                  * (-8, -9, -10) are reserved to ease the hardcoding.
1677                  */
1678                 static const char *ide_words[] = {
1679                         "noprobe", "serialize", "autotune", "noautotune",
1680                         "reset", "dma", "ata66", "minus8", "minus9",
1681                         "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1682                         "dtc2278", "umc8672", "ali14xx", NULL };
1683                 hw = s[3] - '0';
1684                 hwif = &ide_hwifs[hw];
1685                 i = match_parm(&s[4], ide_words, vals, 3);
1686
1687                 /*
1688                  * Cryptic check to ensure chipset not already set for hwif.
1689                  * Note: we can't depend on hwif->chipset here.
1690                  */
1691                 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1692                         /* chipset already specified */
1693                         if (is_chipset_set[hw])
1694                                 goto bad_option;
1695                         if (i > -18 && i <= -11) {
1696                                 /* these drivers are for "ide0=" only */
1697                                 if (hw != 0)
1698                                         goto bad_hwif;
1699                                 /* chipset already specified for 2nd port */
1700                                 if (is_chipset_set[hw+1])
1701                                         goto bad_option;
1702                         }
1703                         is_chipset_set[hw] = 1;
1704                         printk("\n");
1705                 }
1706
1707                 switch (i) {
1708 #ifdef CONFIG_BLK_DEV_ALI14XX
1709                         case -17: /* "ali14xx" */
1710                                 probe_ali14xx = 1;
1711                                 goto done;
1712 #endif
1713 #ifdef CONFIG_BLK_DEV_UMC8672
1714                         case -16: /* "umc8672" */
1715                                 probe_umc8672 = 1;
1716                                 goto done;
1717 #endif
1718 #ifdef CONFIG_BLK_DEV_DTC2278
1719                         case -15: /* "dtc2278" */
1720                                 probe_dtc2278 = 1;
1721                                 goto done;
1722 #endif
1723 #ifdef CONFIG_BLK_DEV_CMD640
1724                         case -14: /* "cmd640_vlb" */
1725                         {
1726                                 extern int cmd640_vlb; /* flag for cmd640.c */
1727                                 cmd640_vlb = 1;
1728                                 goto done;
1729                         }
1730 #endif
1731 #ifdef CONFIG_BLK_DEV_HT6560B
1732                         case -13: /* "ht6560b" */
1733                                 probe_ht6560b = 1;
1734                                 goto done;
1735 #endif
1736 #ifdef CONFIG_BLK_DEV_QD65XX
1737                         case -12: /* "qd65xx" */
1738                                 probe_qd65xx = 1;
1739                                 goto done;
1740 #endif
1741 #ifdef CONFIG_BLK_DEV_4DRIVES
1742                         case -11: /* "four" drives on one set of ports */
1743                         {
1744                                 ide_hwif_t *mate = &ide_hwifs[hw^1];
1745                                 mate->drives[0].select.all ^= 0x20;
1746                                 mate->drives[1].select.all ^= 0x20;
1747                                 hwif->chipset = mate->chipset = ide_4drives;
1748                                 mate->irq = hwif->irq;
1749                                 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1750                                 goto do_serialize;
1751                         }
1752 #endif /* CONFIG_BLK_DEV_4DRIVES */
1753                         case -10: /* minus10 */
1754                         case -9: /* minus9 */
1755                         case -8: /* minus8 */
1756                                 goto bad_option;
1757                         case -7: /* ata66 */
1758 #ifdef CONFIG_BLK_DEV_IDEPCI
1759                                 hwif->udma_four = 1;
1760                                 goto obsolete_option;
1761 #else
1762                                 goto bad_hwif;
1763 #endif
1764                         case -6: /* dma */
1765                                 hwif->autodma = 1;
1766                                 goto obsolete_option;
1767                         case -5: /* "reset" */
1768                                 hwif->reset = 1;
1769                                 goto obsolete_option;
1770                         case -4: /* "noautotune" */
1771                                 hwif->drives[0].autotune = IDE_TUNE_NOAUTO;
1772                                 hwif->drives[1].autotune = IDE_TUNE_NOAUTO;
1773                                 goto obsolete_option;
1774                         case -3: /* "autotune" */
1775                                 hwif->drives[0].autotune = IDE_TUNE_AUTO;
1776                                 hwif->drives[1].autotune = IDE_TUNE_AUTO;
1777                                 goto obsolete_option;
1778                         case -2: /* "serialize" */
1779                         do_serialize:
1780                                 hwif->mate = &ide_hwifs[hw^1];
1781                                 hwif->mate->mate = hwif;
1782                                 hwif->serialized = hwif->mate->serialized = 1;
1783                                 goto obsolete_option;
1784
1785                         case -1: /* "noprobe" */
1786                                 hwif->noprobe = 1;
1787                                 goto done;
1788
1789                         case 1: /* base */
1790                                 vals[1] = vals[0] + 0x206; /* default ctl */
1791                         case 2: /* base,ctl */
1792                                 vals[2] = 0;    /* default irq = probe for it */
1793                         case 3: /* base,ctl,irq */
1794                                 hwif->hw.irq = vals[2];
1795                                 ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq);
1796                                 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
1797                                 hwif->irq      = vals[2];
1798                                 hwif->noprobe  = 0;
1799                                 hwif->chipset  = ide_forced;
1800                                 goto obsolete_option;
1801
1802                         case 0: goto bad_option;
1803                         default:
1804                                 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1805                                 return 1;
1806                 }
1807         }
1808 bad_option:
1809         printk(" -- BAD OPTION\n");
1810         return 1;
1811 obsolete_option:
1812         printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1813         return 1;
1814 bad_hwif:
1815         printk("-- NOT SUPPORTED ON ide%d", hw);
1816 done:
1817         printk("\n");
1818         return 1;
1819 }
1820
1821 extern void __init pnpide_init(void);
1822 extern void __exit pnpide_exit(void);
1823 extern void __init h8300_ide_init(void);
1824
1825 /*
1826  * probe_for_hwifs() finds/initializes "known" IDE interfaces
1827  */
1828 static void __init probe_for_hwifs (void)
1829 {
1830 #ifdef CONFIG_BLK_DEV_IDEPCI
1831         ide_scan_pcibus(ide_scan_direction);
1832 #endif /* CONFIG_BLK_DEV_IDEPCI */
1833
1834 #ifdef CONFIG_ETRAX_IDE
1835         {
1836                 extern void init_e100_ide(void);
1837                 init_e100_ide();
1838         }
1839 #endif /* CONFIG_ETRAX_IDE */
1840 #ifdef CONFIG_BLK_DEV_CMD640
1841         {
1842                 extern void ide_probe_for_cmd640x(void);
1843                 ide_probe_for_cmd640x();
1844         }
1845 #endif /* CONFIG_BLK_DEV_CMD640 */
1846 #ifdef CONFIG_BLK_DEV_IDE_PMAC
1847         {
1848                 extern void pmac_ide_probe(void);
1849                 pmac_ide_probe();
1850         }
1851 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
1852 #ifdef CONFIG_BLK_DEV_GAYLE
1853         {
1854                 extern void gayle_init(void);
1855                 gayle_init();
1856         }
1857 #endif /* CONFIG_BLK_DEV_GAYLE */
1858 #ifdef CONFIG_BLK_DEV_FALCON_IDE
1859         {
1860                 extern void falconide_init(void);
1861                 falconide_init();
1862         }
1863 #endif /* CONFIG_BLK_DEV_FALCON_IDE */
1864 #ifdef CONFIG_BLK_DEV_MAC_IDE
1865         {
1866                 extern void macide_init(void);
1867                 macide_init();
1868         }
1869 #endif /* CONFIG_BLK_DEV_MAC_IDE */
1870 #ifdef CONFIG_BLK_DEV_Q40IDE
1871         {
1872                 extern void q40ide_init(void);
1873                 q40ide_init();
1874         }
1875 #endif /* CONFIG_BLK_DEV_Q40IDE */
1876 #ifdef CONFIG_BLK_DEV_BUDDHA
1877         {
1878                 extern void buddha_init(void);
1879                 buddha_init();
1880         }
1881 #endif /* CONFIG_BLK_DEV_BUDDHA */
1882 #ifdef CONFIG_BLK_DEV_IDEPNP
1883         pnpide_init();
1884 #endif
1885 #ifdef CONFIG_H8300
1886         h8300_ide_init();
1887 #endif
1888 }
1889
1890 void ide_register_subdriver(ide_drive_t *drive, ide_driver_t *driver)
1891 {
1892 #ifdef CONFIG_PROC_FS
1893         ide_add_proc_entries(drive->proc, driver->proc, drive);
1894 #endif
1895 }
1896
1897 EXPORT_SYMBOL(ide_register_subdriver);
1898
1899 /**
1900  *      ide_unregister_subdriver        -       disconnect drive from driver
1901  *      @drive: drive to unplug
1902  *      @driver: driver
1903  *
1904  *      Disconnect a drive from the driver it was attached to and then
1905  *      clean up the various proc files and other objects attached to it.
1906  *
1907  *      Takes ide_setting_sem and ide_lock.
1908  *      Caller must hold none of the locks.
1909  */
1910
1911 void ide_unregister_subdriver(ide_drive_t *drive, ide_driver_t *driver)
1912 {
1913         unsigned long flags;
1914
1915 #ifdef CONFIG_PROC_FS
1916         ide_remove_proc_entries(drive->proc, driver->proc);
1917 #endif
1918         down(&ide_setting_sem);
1919         spin_lock_irqsave(&ide_lock, flags);
1920         /*
1921          * ide_setting_sem protects the settings list
1922          * ide_lock protects the use of settings
1923          *
1924          * so we need to hold both, ide_settings_sem because we want to
1925          * modify the settings list, and ide_lock because we cannot take
1926          * a setting out that is being used.
1927          *
1928          * OTOH both ide_{read,write}_setting are only ever used under
1929          * ide_setting_sem.
1930          */
1931         auto_remove_settings(drive);
1932         spin_unlock_irqrestore(&ide_lock, flags);
1933         up(&ide_setting_sem);
1934 }
1935
1936 EXPORT_SYMBOL(ide_unregister_subdriver);
1937
1938 /*
1939  * Probe module
1940  */
1941
1942 EXPORT_SYMBOL(ide_lock);
1943
1944 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1945 {
1946         return 1;
1947 }
1948
1949 static char *media_string(ide_drive_t *drive)
1950 {
1951         switch (drive->media) {
1952         case ide_disk:
1953                 return "disk";
1954         case ide_cdrom:
1955                 return "cdrom";
1956         case ide_tape:
1957                 return "tape";
1958         case ide_floppy:
1959                 return "floppy";
1960         default:
1961                 return "UNKNOWN";
1962         }
1963 }
1964
1965 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1966 {
1967         ide_drive_t *drive = to_ide_device(dev);
1968         return sprintf(buf, "%s\n", media_string(drive));
1969 }
1970
1971 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1972 {
1973         ide_drive_t *drive = to_ide_device(dev);
1974         return sprintf(buf, "%s\n", drive->name);
1975 }
1976
1977 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1978 {
1979         ide_drive_t *drive = to_ide_device(dev);
1980         return sprintf(buf, "ide:m-%s\n", media_string(drive));
1981 }
1982
1983 static struct device_attribute ide_dev_attrs[] = {
1984         __ATTR_RO(media),
1985         __ATTR_RO(drivename),
1986         __ATTR_RO(modalias),
1987         __ATTR_NULL
1988 };
1989
1990 static int ide_uevent(struct device *dev, char **envp, int num_envp,
1991                       char *buffer, int buffer_size)
1992 {
1993         ide_drive_t *drive = to_ide_device(dev);
1994         int i = 0;
1995         int length = 0;
1996
1997         add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1998                        "MEDIA=%s", media_string(drive));
1999         add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
2000                        "DRIVENAME=%s", drive->name);
2001         add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
2002                        "MODALIAS=ide:m-%s", media_string(drive));
2003         envp[i] = NULL;
2004         return 0;
2005 }
2006
2007 static int generic_ide_probe(struct device *dev)
2008 {
2009         ide_drive_t *drive = to_ide_device(dev);
2010         ide_driver_t *drv = to_ide_driver(dev->driver);
2011
2012         return drv->probe ? drv->probe(drive) : -ENODEV;
2013 }
2014
2015 static int generic_ide_remove(struct device *dev)
2016 {
2017         ide_drive_t *drive = to_ide_device(dev);
2018         ide_driver_t *drv = to_ide_driver(dev->driver);
2019
2020         if (drv->remove)
2021                 drv->remove(drive);
2022
2023         return 0;
2024 }
2025
2026 static void generic_ide_shutdown(struct device *dev)
2027 {
2028         ide_drive_t *drive = to_ide_device(dev);
2029         ide_driver_t *drv = to_ide_driver(dev->driver);
2030
2031         if (dev->driver && drv->shutdown)
2032                 drv->shutdown(drive);
2033 }
2034
2035 struct bus_type ide_bus_type = {
2036         .name           = "ide",
2037         .match          = ide_bus_match,
2038         .uevent         = ide_uevent,
2039         .probe          = generic_ide_probe,
2040         .remove         = generic_ide_remove,
2041         .shutdown       = generic_ide_shutdown,
2042         .dev_attrs      = ide_dev_attrs,
2043         .suspend        = generic_ide_suspend,
2044         .resume         = generic_ide_resume,
2045 };
2046
2047 EXPORT_SYMBOL_GPL(ide_bus_type);
2048
2049 /*
2050  * This is gets invoked once during initialization, to set *everything* up
2051  */
2052 static int __init ide_init(void)
2053 {
2054         int ret;
2055
2056         printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
2057         system_bus_speed = ide_system_bus_speed();
2058
2059         ret = bus_register(&ide_bus_type);
2060         if (ret < 0) {
2061                 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
2062                 return ret;
2063         }
2064
2065         init_ide_data();
2066
2067 #ifdef CONFIG_PROC_FS
2068         proc_ide_root = proc_mkdir("ide", NULL);
2069 #endif
2070
2071 #ifdef CONFIG_BLK_DEV_ALI14XX
2072         if (probe_ali14xx)
2073                 (void)ali14xx_init();
2074 #endif
2075 #ifdef CONFIG_BLK_DEV_UMC8672
2076         if (probe_umc8672)
2077                 (void)umc8672_init();
2078 #endif
2079 #ifdef CONFIG_BLK_DEV_DTC2278
2080         if (probe_dtc2278)
2081                 (void)dtc2278_init();
2082 #endif
2083 #ifdef CONFIG_BLK_DEV_HT6560B
2084         if (probe_ht6560b)
2085                 (void)ht6560b_init();
2086 #endif
2087 #ifdef CONFIG_BLK_DEV_QD65XX
2088         if (probe_qd65xx)
2089                 (void)qd65xx_init();
2090 #endif
2091
2092         initializing = 1;
2093         /* Probe for special PCI and other "known" interface chipsets. */
2094         probe_for_hwifs();
2095         initializing = 0;
2096
2097 #ifdef CONFIG_PROC_FS
2098         proc_ide_create();
2099 #endif
2100         return 0;
2101 }
2102
2103 #ifdef MODULE
2104 static char *options = NULL;
2105 module_param(options, charp, 0);
2106 MODULE_LICENSE("GPL");
2107
2108 static void __init parse_options (char *line)
2109 {
2110         char *next = line;
2111
2112         if (line == NULL || !*line)
2113                 return;
2114         while ((line = next) != NULL) {
2115                 if ((next = strchr(line,' ')) != NULL)
2116                         *next++ = 0;
2117                 if (!ide_setup(line))
2118                         printk (KERN_INFO "Unknown option '%s'\n", line);
2119         }
2120 }
2121
2122 int __init init_module (void)
2123 {
2124         parse_options(options);
2125         return ide_init();
2126 }
2127
2128 void __exit cleanup_module (void)
2129 {
2130         int index;
2131
2132         for (index = 0; index < MAX_HWIFS; ++index)
2133                 ide_unregister(index);
2134
2135 #ifdef CONFIG_BLK_DEV_IDEPNP
2136         pnpide_exit();
2137 #endif
2138
2139 #ifdef CONFIG_PROC_FS
2140         proc_ide_destroy();
2141 #endif
2142
2143         bus_unregister(&ide_bus_type);
2144 }
2145
2146 #else /* !MODULE */
2147
2148 __setup("", ide_setup);
2149
2150 module_init(ide_init);
2151
2152 #endif /* MODULE */