drivers/ide/ide.c

   1 /*
   2  *  linux/drivers/ide/ide.c             Version 7.00beta2       Mar 05 2003
   3  *
   4  *  Copyright (C) 1994-1998  Linus Torvalds & authors (see below)
   5  */
   6
   7 /*
   8  *  Mostly written by Mark Lord  <mlord@pobox.com>
   9  *                and Gadi Oxman <gadio@netvision.net.il>
  10  *                and Andre Hedrick <andre@linux-ide.org>
  11  *
  12  *  See linux/MAINTAINERS for address of current maintainer.
  13  *
  14  * This is the multiple IDE interface driver, as evolved from hd.c.
  15  * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs
  16  *   (usually 14 & 15).
  17  * There can be up to two drives per interface, as per the ATA-2 spec.
  18  *
  19  * Primary:    ide0, port 0x1f0; major=3;  hda is minor=0; hdb is minor=64
  20  * Secondary:  ide1, port 0x170; major=22; hdc is minor=0; hdd is minor=64
  21  * Tertiary:   ide2, port 0x???; major=33; hde is minor=0; hdf is minor=64
  22  * Quaternary: ide3, port 0x???; major=34; hdg is minor=0; hdh is minor=64
  23  * ...
  24  *
  25  *  From hd.c:
  26  *  |
  27  *  | It traverses the request-list, using interrupts to jump between functions.
  28  *  | As nearly all functions can be called within interrupts, we may not sleep.
  29  *  | Special care is recommended.  Have Fun!
  30  *  |
  31  *  | modified by Drew Eckhardt to check nr of hd's from the CMOS.
  32  *  |
  33  *  | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
  34  *  | in the early extended-partition checks and added DM partitions.
  35  *  |
  36  *  | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
  37  *  |
  38  *  | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
  39  *  | and general streamlining by Mark Lord (mlord@pobox.com).
  40  *
  41  *  October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
  42  *
  43  *      Mark Lord       (mlord@pobox.com)               (IDE Perf.Pkg)
  44  *      Delman Lee      (delman@ieee.org)               ("Mr. atdisk2")
  45  *      Scott Snyder    (snyder@fnald0.fnal.gov)        (ATAPI IDE cd-rom)
  46  *
  47  *  This was a rewrite of just about everything from hd.c, though some original
  48  *  code is still sprinkled about.  Think of it as a major evolution, with
  49  *  inspiration from lots of linux users, esp.  hamish@zot.apana.org.au
  50  *
  51  *  Version 1.0 ALPHA   initial code, primary i/f working okay
  52  *  Version 1.3 BETA    dual i/f on shared irq tested & working!
  53  *  Version 1.4 BETA    added auto probing for irq(s)
  54  *  Version 1.5 BETA    added ALPHA (untested) support for IDE cd-roms,
  55  *  ...
  56  * Version 5.50         allow values as small as 20 for idebus=
  57  * Version 5.51         force non io_32bit in drive_cmd_intr()
  58  *                      change delay_10ms() to delay_50ms() to fix problems
  59  * Version 5.52         fix incorrect invalidation of removable devices
  60  *                      add "hdx=slow" command line option
  61  * Version 5.60         start to modularize the driver; the disk and ATAPI
  62  *                       drivers can be compiled as loadable modules.
  63  *                      move IDE probe code to ide-probe.c
  64  *                      move IDE disk code to ide-disk.c
  65  *                      add support for generic IDE device subdrivers
  66  *                      add m68k code from Geert Uytterhoeven
  67  *                      probe all interfaces by default
  68  *                      add ioctl to (re)probe an interface
  69  * Version 6.00         use per device request queues
  70  *                      attempt to optimize shared hwgroup performance
  71  *                      add ioctl to manually adjust bandwidth algorithms
  72  *                      add kerneld support for the probe module
  73  *                      fix bug in ide_error()
  74  *                      fix bug in the first ide_get_lock() call for Atari
  75  *                      don't flush leftover data for ATAPI devices
  76  * Version 6.01         clear hwgroup->active while the hwgroup sleeps
  77  *                      support HDIO_GETGEO for floppies
  78  * Version 6.02         fix ide_ack_intr() call
  79  *                      check partition table on floppies
  80  * Version 6.03         handle bad status bit sequencing in ide_wait_stat()
  81  * Version 6.10         deleted old entries from this list of updates
  82  *                      replaced triton.c with ide-dma.c generic PCI DMA
  83  *                      added support for BIOS-enabled UltraDMA
  84  *                      rename all "promise" things to "pdc4030"
  85  *                      fix EZ-DRIVE handling on small disks
  86  * Version 6.11         fix probe error in ide_scan_devices()
  87  *                      fix ancient "jiffies" polling bugs
  88  *                      mask all hwgroup interrupts on each irq entry
  89  * Version 6.12         integrate ioctl and proc interfaces
  90  *                      fix parsing of "idex=" command line parameter
  91  * Version 6.13         add support for ide4/ide5 courtesy rjones@orchestream.com
  92  * Version 6.14         fixed IRQ sharing among PCI devices
  93  * Version 6.15         added SMP awareness to IDE drivers
  94  * Version 6.16         fixed various bugs; even more SMP friendly
  95  * Version 6.17         fix for newest EZ-Drive problem
  96  * Version 6.18         default unpartitioned-disk translation now "BIOS LBA"
  97  * Version 6.19         Re-design for a UNIFORM driver for all platforms,
  98  *                        model based on suggestions from Russell King and
  99  *                        Geert Uytterhoeven
 100  *                      Promise DC4030VL now supported.
 101  *                      add support for ide6/ide7
 102  *                      delay_50ms() changed to ide_delay_50ms() and exported.
 103  * Version 6.20         Added/Fixed Generic ATA-66 support and hwif detection.
 104  *                      Added hdx=flash to allow for second flash disk
 105  *                        detection w/o the hang loop.
 106  *                      Added support for ide8/ide9
 107  *                      Added idex=ata66 for the quirky chipsets that are
 108  *                        ATA-66 compliant, but have yet to determine a method
 109  *                        of verification of the 80c cable presence.
 110  *                        Specifically Promise's PDC20262 chipset.
 111  * Version 6.21         Fixing/Fixed SMP spinlock issue with insight from an old
 112  *                        hat that clarified original low level driver design.
 113  * Version 6.30         Added SMP support; fixed multmode issues.  -ml
 114  * Version 6.31         Debug Share INTR's and request queue streaming
 115  *                      Native ATA-100 support
 116  *                      Prep for Cascades Project
 117  * Version 7.00alpha    First named revision of ide rearrange
 118  *
 119  *  Some additional driver compile-time options are in ./include/linux/ide.h
 120  *
 121  *  To do, in likely order of completion:
 122  *      - modify kernel to obtain BIOS geometry for drives on 2nd/3rd/4th i/f
 123  *
 124  */
 125
 126 #define REVISION        "Revision: 7.00alpha2"
 127 #define VERSION         "Id: ide.c 7.00a2 20020906"
 128
 129 #undef REALLY_SLOW_IO           /* most systems can safely undef this */
 130
 131 #define _IDE_C                  /* Tell ide.h it's really us */
 132
 133 #include <linux/config.h>
 134 #include <linux/module.h>
 135 #include <linux/types.h>
 136 #include <linux/string.h>
 137 #include <linux/kernel.h>
 138 #include <linux/timer.h>
 139 #include <linux/mm.h>
 140 #include <linux/interrupt.h>
 141 #include <linux/major.h>
 142 #include <linux/errno.h>
 143 #include <linux/genhd.h>
 144 #include <linux/blkpg.h>
 145 #include <linux/slab.h>
 146 #include <linux/init.h>
 147 #include <linux/pci.h>
 148 #include <linux/delay.h>
 149 #include <linux/ide.h>
 150 #include <linux/completion.h>
 151 #include <linux/reboot.h>
 152 #include <linux/cdrom.h>
 153 #include <linux/seq_file.h>
 154 #include <linux/device.h>
 155 #include <linux/bitops.h>
 156
 157 #include <asm/byteorder.h>
 158 #include <asm/irq.h>
 159 #include <asm/uaccess.h>
 160 #include <asm/io.h>
 161
 162
 163 /* default maximum number of failures */
 164 #define IDE_DEFAULT_MAX_FAILURES        1
 165
 166 static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
 167                                         IDE2_MAJOR, IDE3_MAJOR,
 168                                         IDE4_MAJOR, IDE5_MAJOR,
 169                                         IDE6_MAJOR, IDE7_MAJOR,
 170                                         IDE8_MAJOR, IDE9_MAJOR };
 171
 172 static int idebus_parameter;    /* holds the "idebus=" parameter */
 173 static int system_bus_speed;    /* holds what we think is VESA/PCI bus speed */
 174 static int initializing;        /* set while initializing built-in drivers */
 175
 176 DECLARE_MUTEX(ide_cfg_sem);
 177  __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
 178
 179 #ifdef CONFIG_BLK_DEV_IDEPCI
 180 static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
 181 #endif
 182
 183 #ifdef CONFIG_IDEDMA_AUTO
 184 int noautodma = 0;
 185 #else
 186 int noautodma = 1;
 187 #endif
 188
 189 EXPORT_SYMBOL(noautodma);
 190
 191 /*
 192  * This is declared extern in ide.h, for access by other IDE modules:
 193  */
 194 ide_hwif_t ide_hwifs[MAX_HWIFS];        /* master data repository */
 195
 196 EXPORT_SYMBOL(ide_hwifs);
 197
 198 /*
 199  * Do not even *think* about calling this!
 200  */
 201 static void init_hwif_data(ide_hwif_t *hwif, unsigned int index)
 202 {
 203         unsigned int unit;
 204
 205         /* bulk initialize hwif & drive info with zeros */
 206         memset(hwif, 0, sizeof(ide_hwif_t));
 207
 208         /* fill in any non-zero initial values */
 209         hwif->index     = index;
 210         hwif->major     = ide_hwif_to_major[index];
 211
 212         hwif->name[0]   = 'i';
 213         hwif->name[1]   = 'd';
 214         hwif->name[2]   = 'e';
 215         hwif->name[3]   = '0' + index;
 216
 217         hwif->bus_state = BUSSTATE_ON;
 218
 219         hwif->atapi_dma = 0;            /* disable all atapi dma */
 220         hwif->ultra_mask = 0x80;        /* disable all ultra */
 221         hwif->mwdma_mask = 0x80;        /* disable all mwdma */
 222         hwif->swdma_mask = 0x80;        /* disable all swdma */
 223
 224         init_completion(&hwif->gendev_rel_comp);
 225
 226         default_hwif_iops(hwif);
 227         default_hwif_transport(hwif);
 228         for (unit = 0; unit < MAX_DRIVES; ++unit) {
 229                 ide_drive_t *drive = &hwif->drives[unit];
 230
 231                 drive->media                    = ide_disk;
 232                 drive->select.all               = (unit<<4)|0xa0;
 233                 drive->hwif                     = hwif;
 234                 drive->ctl                      = 0x08;
 235                 drive->ready_stat               = READY_STAT;
 236                 drive->bad_wstat                = BAD_W_STAT;
 237                 drive->special.b.recalibrate    = 1;
 238                 drive->special.b.set_geometry   = 1;
 239                 drive->name[0]                  = 'h';
 240                 drive->name[1]                  = 'd';
 241                 drive->name[2]                  = 'a' + (index * MAX_DRIVES) + unit;
 242                 drive->max_failures             = IDE_DEFAULT_MAX_FAILURES;
 243                 drive->using_dma                = 0;
 244                 drive->vdma                     = 0;
 245                 INIT_LIST_HEAD(&drive->list);
 246                 init_completion(&drive->gendev_rel_comp);
 247         }
 248 }
 249
 250 static void init_hwif_default(ide_hwif_t *hwif, unsigned int index)
 251 {
 252         hw_regs_t hw;
 253
 254         memset(&hw, 0, sizeof(hw_regs_t));
 255
 256         ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq);
 257
 258         memcpy(&hwif->hw, &hw, sizeof(hw));
 259         memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
 260
 261         hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
 262 #ifdef CONFIG_BLK_DEV_HD
 263         if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA)
 264                 hwif->noprobe = 1;      /* may be overridden by ide_setup() */
 265 #endif
 266 }
 267
 268 extern void ide_arm_init(void);
 269
 270 /*
 271  * init_ide_data() sets reasonable default values into all fields
 272  * of all instances of the hwifs and drives, but only on the first call.
 273  * Subsequent calls have no effect (they don't wipe out anything).
 274  *
 275  * This routine is normally called at driver initialization time,
 276  * but may also be called MUCH earlier during kernel "command-line"
 277  * parameter processing.  As such, we cannot depend on any other parts
 278  * of the kernel (such as memory allocation) to be functioning yet.
 279  *
 280  * This is too bad, as otherwise we could dynamically allocate the
 281  * ide_drive_t structs as needed, rather than always consuming memory
 282  * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
 283  *
 284  * FIXME: We should stuff the setup data into __init and copy the
 285  * relevant hwifs/allocate them properly during boot.
 286  */
 287 #define MAGIC_COOKIE 0x12345678
 288 static void __init init_ide_data (void)
 289 {
 290         ide_hwif_t *hwif;
 291         unsigned int index;
 292         static unsigned long magic_cookie = MAGIC_COOKIE;
 293
 294         if (magic_cookie != MAGIC_COOKIE)
 295                 return;         /* already initialized */
 296         magic_cookie = 0;
 297
 298         /* Initialise all interface structures */
 299         for (index = 0; index < MAX_HWIFS; ++index) {
 300                 hwif = &ide_hwifs[index];
 301                 init_hwif_data(hwif, index);
 302                 init_hwif_default(hwif, index);
 303 #if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
 304                 hwif->irq = hwif->hw.irq =
 305                         ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
 306 #endif
 307         }
 308 #ifdef CONFIG_IDE_ARM
 309         initializing = 1;
 310         ide_arm_init();
 311         initializing = 0;
 312 #endif
 313 }
 314
 315 /**
 316  *      ide_system_bus_speed    -       guess bus speed
 317  *
 318  *      ide_system_bus_speed() returns what we think is the system VESA/PCI
 319  *      bus speed (in MHz). This is used for calculating interface PIO timings.
 320  *      The default is 40 for known PCI systems, 50 otherwise.
 321  *      The "idebus=xx" parameter can be used to override this value.
 322  *      The actual value to be used is computed/displayed the first time
 323  *      through. Drivers should only use this as a last resort.
 324  *
 325  *      Returns a guessed speed in MHz.
 326  */
 327
 328 static int ide_system_bus_speed(void)
 329 {
 330 #ifdef CONFIG_PCI
 331         static struct pci_device_id pci_default[] = {
 332                 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
 333                 { }
 334         };
 335 #else
 336 #define pci_default 0
 337 #endif /* CONFIG_PCI */
 338
 339         if (!system_bus_speed) {
 340                 if (idebus_parameter) {
 341                         /* user supplied value */
 342                         system_bus_speed = idebus_parameter;
 343                 } else if (pci_dev_present(pci_default)) {
 344                         /* safe default value for PCI */
 345                         system_bus_speed = 33;
 346                 } else {
 347                         /* safe default value for VESA and PCI */
 348                         system_bus_speed = 50;
 349                 }
 350                 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
 351                         "for PIO modes%s\n", system_bus_speed,
 352                         idebus_parameter ? "" : "; override with idebus=xx");
 353         }
 354         return system_bus_speed;
 355 }
 356
 357 #ifdef CONFIG_PROC_FS
 358 struct proc_dir_entry *proc_ide_root;
 359 #endif
 360
 361 static struct resource* hwif_request_region(ide_hwif_t *hwif,
 362                                             unsigned long addr, int num)
 363 {
 364         struct resource *res = request_region(addr, num, hwif->name);
 365
 366         if (!res)
 367                 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
 368                                 hwif->name, addr, addr+num-1);
 369         return res;
 370 }
 371
 372 /**
 373  *      ide_hwif_request_regions - request resources for IDE
 374  *      @hwif: interface to use
 375  *
 376  *      Requests all the needed resources for an interface.
 377  *      Right now core IDE code does this work which is deeply wrong.
 378  *      MMIO leaves it to the controller driver,
 379  *      PIO will migrate this way over time.
 380  */
 381
 382 int ide_hwif_request_regions(ide_hwif_t *hwif)
 383 {
 384         unsigned long addr;
 385         unsigned int i;
 386
 387         if (hwif->mmio == 2)
 388                 return 0;
 389         BUG_ON(hwif->mmio == 1);
 390         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
 391         if (addr && !hwif_request_region(hwif, addr, 1))
 392                 goto control_region_busy;
 393         hwif->straight8 = 0;
 394         addr = hwif->io_ports[IDE_DATA_OFFSET];
 395         if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
 396                 if (!hwif_request_region(hwif, addr, 8))
 397                         goto data_region_busy;
 398                 hwif->straight8 = 1;
 399                 return 0;
 400         }
 401         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
 402                 addr = hwif->io_ports[i];
 403                 if (!hwif_request_region(hwif, addr, 1)) {
 404                         while (--i)
 405                                 release_region(addr, 1);
 406                         goto data_region_busy;
 407                 }
 408         }
 409         return 0;
 410
 411 data_region_busy:
 412         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
 413         if (addr)
 414                 release_region(addr, 1);
 415 control_region_busy:
 416         /* If any errors are return, we drop the hwif interface. */
 417         return -EBUSY;
 418 }
 419
 420 /**
 421  *      ide_hwif_release_regions - free IDE resources
 422  *
 423  *      Note that we only release the standard ports,
 424  *      and do not even try to handle any extra ports
 425  *      allocated for weird IDE interface chipsets.
 426  *
 427  *      Note also that we don't yet handle mmio resources here. More
 428  *      importantly our caller should be doing this so we need to
 429  *      restructure this as a helper function for drivers.
 430  */
 431
 432 void ide_hwif_release_regions(ide_hwif_t *hwif)
 433 {
 434         u32 i = 0;
 435
 436         if (hwif->mmio == 2)
 437                 return;
 438         if (hwif->io_ports[IDE_CONTROL_OFFSET])
 439                 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
 440         if (hwif->straight8) {
 441                 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
 442                 return;
 443         }
 444         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
 445                 if (hwif->io_ports[i])
 446                         release_region(hwif->io_ports[i], 1);
 447 }
 448
 449 /**
 450  *      ide_hwif_restore        -       restore hwif to template
 451  *      @hwif: hwif to update
 452  *      @tmp_hwif: template
 453  *
 454  *      Restore hwif to a previous state by copying most settngs
 455  *      from the template.
 456  */
 457
 458 static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
 459 {
 460         hwif->hwgroup                   = tmp_hwif->hwgroup;
 461
 462         hwif->gendev.parent             = tmp_hwif->gendev.parent;
 463
 464         hwif->proc                      = tmp_hwif->proc;
 465
 466         hwif->major                     = tmp_hwif->major;
 467         hwif->straight8                 = tmp_hwif->straight8;
 468         hwif->bus_state                 = tmp_hwif->bus_state;
 469
 470         hwif->atapi_dma                 = tmp_hwif->atapi_dma;
 471         hwif->ultra_mask                = tmp_hwif->ultra_mask;
 472         hwif->mwdma_mask                = tmp_hwif->mwdma_mask;
 473         hwif->swdma_mask                = tmp_hwif->swdma_mask;
 474
 475         hwif->chipset                   = tmp_hwif->chipset;
 476         hwif->hold                      = tmp_hwif->hold;
 477
 478 #ifdef CONFIG_BLK_DEV_IDEPCI
 479         hwif->pci_dev                   = tmp_hwif->pci_dev;
 480         hwif->cds                       = tmp_hwif->cds;
 481 #endif
 482
 483         hwif->tuneproc                  = tmp_hwif->tuneproc;
 484         hwif->speedproc                 = tmp_hwif->speedproc;
 485         hwif->selectproc                = tmp_hwif->selectproc;
 486         hwif->reset_poll                = tmp_hwif->reset_poll;
 487         hwif->pre_reset                 = tmp_hwif->pre_reset;
 488         hwif->resetproc                 = tmp_hwif->resetproc;
 489         hwif->intrproc                  = tmp_hwif->intrproc;
 490         hwif->maskproc                  = tmp_hwif->maskproc;
 491         hwif->quirkproc                 = tmp_hwif->quirkproc;
 492         hwif->busproc                   = tmp_hwif->busproc;
 493
 494         hwif->ata_input_data            = tmp_hwif->ata_input_data;
 495         hwif->ata_output_data           = tmp_hwif->ata_output_data;
 496         hwif->atapi_input_bytes         = tmp_hwif->atapi_input_bytes;
 497         hwif->atapi_output_bytes        = tmp_hwif->atapi_output_bytes;
 498
 499         hwif->dma_setup                 = tmp_hwif->dma_setup;
 500         hwif->dma_exec_cmd              = tmp_hwif->dma_exec_cmd;
 501         hwif->dma_start                 = tmp_hwif->dma_start;
 502         hwif->ide_dma_end               = tmp_hwif->ide_dma_end;
 503         hwif->ide_dma_check             = tmp_hwif->ide_dma_check;
 504         hwif->ide_dma_on                = tmp_hwif->ide_dma_on;
 505         hwif->ide_dma_off_quietly       = tmp_hwif->ide_dma_off_quietly;
 506         hwif->ide_dma_test_irq          = tmp_hwif->ide_dma_test_irq;
 507         hwif->ide_dma_host_on           = tmp_hwif->ide_dma_host_on;
 508         hwif->ide_dma_host_off          = tmp_hwif->ide_dma_host_off;
 509         hwif->ide_dma_lostirq           = tmp_hwif->ide_dma_lostirq;
 510         hwif->ide_dma_timeout           = tmp_hwif->ide_dma_timeout;
 511
 512         hwif->OUTB                      = tmp_hwif->OUTB;
 513         hwif->OUTBSYNC                  = tmp_hwif->OUTBSYNC;
 514         hwif->OUTW                      = tmp_hwif->OUTW;
 515         hwif->OUTL                      = tmp_hwif->OUTL;
 516         hwif->OUTSW                     = tmp_hwif->OUTSW;
 517         hwif->OUTSL                     = tmp_hwif->OUTSL;
 518
 519         hwif->INB                       = tmp_hwif->INB;
 520         hwif->INW                       = tmp_hwif->INW;
 521         hwif->INL                       = tmp_hwif->INL;
 522         hwif->INSW                      = tmp_hwif->INSW;
 523         hwif->INSL                      = tmp_hwif->INSL;
 524
 525         hwif->sg_max_nents              = tmp_hwif->sg_max_nents;
 526
 527         hwif->mmio                      = tmp_hwif->mmio;
 528         hwif->rqsize                    = tmp_hwif->rqsize;
 529         hwif->no_lba48                  = tmp_hwif->no_lba48;
 530
 531 #ifndef CONFIG_BLK_DEV_IDECS
 532         hwif->irq                       = tmp_hwif->irq;
 533 #endif
 534
 535         hwif->dma_base                  = tmp_hwif->dma_base;
 536         hwif->dma_master                = tmp_hwif->dma_master;
 537         hwif->dma_command               = tmp_hwif->dma_command;
 538         hwif->dma_vendor1               = tmp_hwif->dma_vendor1;
 539         hwif->dma_status                = tmp_hwif->dma_status;
 540         hwif->dma_vendor3               = tmp_hwif->dma_vendor3;
 541         hwif->dma_prdtable              = tmp_hwif->dma_prdtable;
 542
 543         hwif->dma_extra                 = tmp_hwif->dma_extra;
 544         hwif->config_data               = tmp_hwif->config_data;
 545         hwif->select_data               = tmp_hwif->select_data;
 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 interfce will not be reopened (present/vanishing locking
 568  *      isnt 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
 680         /* copy original settings */
 681         tmp_hwif = *hwif;
 682
 683         /* restore hwif data to pristine status */
 684         init_hwif_data(hwif, index);
 685         init_hwif_default(hwif, index);
 686
 687         ide_hwif_restore(hwif, &tmp_hwif);
 688
 689 abort:
 690         spin_unlock_irq(&ide_lock);
 691         up(&ide_cfg_sem);
 692 }
 693
 694 EXPORT_SYMBOL(ide_unregister);
 695
 696
 697 /**
 698  *      ide_setup_ports         -       set up IDE interface ports
 699  *      @hw: register descriptions
 700  *      @base: base register
 701  *      @offsets: table of register offsets
 702  *      @ctrl: control register
 703  *      @ack_irq: IRQ ack
 704  *      @irq: interrupt lie
 705  *
 706  *      Setup hw_regs_t structure described by parameters.  You
 707  *      may set up the hw structure yourself OR use this routine to
 708  *      do it for you. This is basically a helper
 709  *
 710  */
 711
 712 void ide_setup_ports (  hw_regs_t *hw,
 713                         unsigned long base, int *offsets,
 714                         unsigned long ctrl, unsigned long intr,
 715                         ide_ack_intr_t *ack_intr,
 716 /*
 717  *                      ide_io_ops_t *iops,
 718  */
 719                         int irq)
 720 {
 721         int i;
 722
 723         memset(hw, 0, sizeof(hw_regs_t));
 724         for (i = 0; i < IDE_NR_PORTS; i++) {
 725                 if (offsets[i] == -1) {
 726                         switch(i) {
 727                                 case IDE_CONTROL_OFFSET:
 728                                         hw->io_ports[i] = ctrl;
 729                                         break;
 730 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
 731                                 case IDE_IRQ_OFFSET:
 732                                         hw->io_ports[i] = intr;
 733                                         break;
 734 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
 735                                 default:
 736                                         hw->io_ports[i] = 0;
 737                                         break;
 738                         }
 739                 } else {
 740                         hw->io_ports[i] = base + offsets[i];
 741                 }
 742         }
 743         hw->irq = irq;
 744         hw->dma = NO_DMA;
 745         hw->ack_intr = ack_intr;
 746 /*
 747  *      hw->iops = iops;
 748  */
 749 }
 750
 751 /**
 752  *      ide_register_hw_with_fixup      -       register IDE interface
 753  *      @hw: hardware registers
 754  *      @hwifp: pointer to returned hwif
 755  *      @fixup: fixup function
 756  *
 757  *      Register an IDE interface, specifying exactly the registers etc.
 758  *      Set init=1 iff calling before probes have taken place.
 759  *
 760  *      Returns -1 on error.
 761  */
 762
 763 int ide_register_hw_with_fixup(hw_regs_t *hw, ide_hwif_t **hwifp, void(*fixup)(ide_hwif_t *hwif))
 764 {
 765         int index, retry = 1;
 766         ide_hwif_t *hwif;
 767
 768         do {
 769                 for (index = 0; index < MAX_HWIFS; ++index) {
 770                         hwif = &ide_hwifs[index];
 771                         if (hwif->hw.io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
 772                                 goto found;
 773                 }
 774                 for (index = 0; index < MAX_HWIFS; ++index) {
 775                         hwif = &ide_hwifs[index];
 776                         if (hwif->hold)
 777                                 continue;
 778                         if ((!hwif->present && !hwif->mate && !initializing) ||
 779                             (!hwif->hw.io_ports[IDE_DATA_OFFSET] && initializing))
 780                                 goto found;
 781                 }
 782                 for (index = 0; index < MAX_HWIFS; index++)
 783                         ide_unregister(index);
 784         } while (retry--);
 785         return -1;
 786 found:
 787         if (hwif->present)
 788                 ide_unregister(index);
 789         else if (!hwif->hold) {
 790                 init_hwif_data(hwif, index);
 791                 init_hwif_default(hwif, index);
 792         }
 793         if (hwif->present)
 794                 return -1;
 795         memcpy(&hwif->hw, hw, sizeof(*hw));
 796         memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports));
 797         hwif->irq = hw->irq;
 798         hwif->noprobe = 0;
 799         hwif->chipset = hw->chipset;
 800         hwif->gendev.parent = hw->dev;
 801
 802         if (!initializing) {
 803                 probe_hwif_init_with_fixup(hwif, fixup);
 804                 create_proc_ide_interfaces();
 805         }
 806
 807         if (hwifp)
 808                 *hwifp = hwif;
 809
 810         return (initializing || hwif->present) ? index : -1;
 811 }
 812
 813 EXPORT_SYMBOL(ide_register_hw_with_fixup);
 814
 815 int ide_register_hw(hw_regs_t *hw, ide_hwif_t **hwifp)
 816 {
 817         return ide_register_hw_with_fixup(hw, hwifp, NULL);
 818 }
 819
 820 EXPORT_SYMBOL(ide_register_hw);
 821
 822 /*
 823  *      Locks for IDE setting functionality
 824  */
 825
 826 DECLARE_MUTEX(ide_setting_sem);
 827
 828 /**
 829  *      __ide_add_setting       -       add an ide setting option
 830  *      @drive: drive to use
 831  *      @name: setting name
 832  *      @rw: true if the function is read write
 833  *      @read_ioctl: function to call on read
 834  *      @write_ioctl: function to call on write
 835  *      @data_type: type of data
 836  *      @min: range minimum
 837  *      @max: range maximum
 838  *      @mul_factor: multiplication scale
 839  *      @div_factor: divison scale
 840  *      @data: private data field
 841  *      @set: setting
 842  *      @auto_remove: setting auto removal flag
 843  *
 844  *      Removes the setting named from the device if it is present.
 845  *      The function takes the settings_lock to protect against
 846  *      parallel changes. This function must not be called from IRQ
 847  *      context. Returns 0 on success or -1 on failure.
 848  *
 849  *      BUGS: This code is seriously over-engineered. There is also
 850  *      magic about how the driver specific features are setup. If
 851  *      a driver is attached we assume the driver settings are auto
 852  *      remove.
 853  */
 854
 855 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)
 856 {
 857         ide_settings_t **p = (ide_settings_t **) &drive->settings, *setting = NULL;
 858
 859         down(&ide_setting_sem);
 860         while ((*p) && strcmp((*p)->name, name) < 0)
 861                 p = &((*p)->next);
 862         if ((setting = kzalloc(sizeof(*setting), GFP_KERNEL)) == NULL)
 863                 goto abort;
 864         if ((setting->name = kmalloc(strlen(name) + 1, GFP_KERNEL)) == NULL)
 865                 goto abort;
 866         strcpy(setting->name, name);
 867         setting->rw = rw;
 868         setting->read_ioctl = read_ioctl;
 869         setting->write_ioctl = write_ioctl;
 870         setting->data_type = data_type;
 871         setting->min = min;
 872         setting->max = max;
 873         setting->mul_factor = mul_factor;
 874         setting->div_factor = div_factor;
 875         setting->data = data;
 876         setting->set = set;
 877
 878         setting->next = *p;
 879         if (auto_remove)
 880                 setting->auto_remove = 1;
 881         *p = setting;
 882         up(&ide_setting_sem);
 883         return 0;
 884 abort:
 885         up(&ide_setting_sem);
 886         kfree(setting);
 887         return -1;
 888 }
 889
 890 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)
 891 {
 892         return __ide_add_setting(drive, name, rw, read_ioctl, write_ioctl, data_type, min, max, mul_factor, div_factor, data, set, 1);
 893 }
 894
 895 EXPORT_SYMBOL(ide_add_setting);
 896
 897 /**
 898  *      __ide_remove_setting    -       remove an ide setting option
 899  *      @drive: drive to use
 900  *      @name: setting name
 901  *
 902  *      Removes the setting named from the device if it is present.
 903  *      The caller must hold the setting semaphore.
 904  */
 905
 906 static void __ide_remove_setting (ide_drive_t *drive, char *name)
 907 {
 908         ide_settings_t **p, *setting;
 909
 910         p = (ide_settings_t **) &drive->settings;
 911
 912         while ((*p) && strcmp((*p)->name, name))
 913                 p = &((*p)->next);
 914         if ((setting = (*p)) == NULL)
 915                 return;
 916
 917         (*p) = setting->next;
 918
 919         kfree(setting->name);
 920         kfree(setting);
 921 }
 922
 923 /**
 924  *      ide_find_setting_by_ioctl       -       find a drive specific ioctl
 925  *      @drive: drive to scan
 926  *      @cmd: ioctl command to handle
 927  *
 928  *      Scan's the device setting table for a matching entry and returns
 929  *      this or NULL if no entry is found. The caller must hold the
 930  *      setting semaphore
 931  */
 932
 933 static ide_settings_t *ide_find_setting_by_ioctl (ide_drive_t *drive, int cmd)
 934 {
 935         ide_settings_t *setting = drive->settings;
 936
 937         while (setting) {
 938                 if (setting->read_ioctl == cmd || setting->write_ioctl == cmd)
 939                         break;
 940                 setting = setting->next;
 941         }
 942
 943         return setting;
 944 }
 945
 946 /**
 947  *      ide_find_setting_by_name        -       find a drive specific setting
 948  *      @drive: drive to scan
 949  *      @name: setting name
 950  *
 951  *      Scan's the device setting table for a matching entry and returns
 952  *      this or NULL if no entry is found. The caller must hold the
 953  *      setting semaphore
 954  */
 955
 956 ide_settings_t *ide_find_setting_by_name (ide_drive_t *drive, char *name)
 957 {
 958         ide_settings_t *setting = drive->settings;
 959
 960         while (setting) {
 961                 if (strcmp(setting->name, name) == 0)
 962                         break;
 963                 setting = setting->next;
 964         }
 965         return setting;
 966 }
 967
 968 /**
 969  *      auto_remove_settings    -       remove driver specific settings
 970  *      @drive: drive
 971  *
 972  *      Automatically remove all the driver specific settings for this
 973  *      drive. This function may sleep and must not be called from IRQ
 974  *      context. The caller must hold ide_setting_sem.
 975  */
 976
 977 static void auto_remove_settings (ide_drive_t *drive)
 978 {
 979         ide_settings_t *setting;
 980 repeat:
 981         setting = drive->settings;
 982         while (setting) {
 983                 if (setting->auto_remove) {
 984                         __ide_remove_setting(drive, setting->name);
 985                         goto repeat;
 986                 }
 987                 setting = setting->next;
 988         }
 989 }
 990
 991 /**
 992  *      ide_read_setting        -       read an IDE setting
 993  *      @drive: drive to read from
 994  *      @setting: drive setting
 995  *
 996  *      Read a drive setting and return the value. The caller
 997  *      must hold the ide_setting_sem when making this call.
 998  *
 999  *      BUGS: the data return and error are the same return value
1000  *      so an error -EINVAL and true return of the same value cannot
1001  *      be told apart
1002  */
1003
1004 int ide_read_setting (ide_drive_t *drive, ide_settings_t *setting)
1005 {
1006         int             val = -EINVAL;
1007         unsigned long   flags;
1008
1009         if ((setting->rw & SETTING_READ)) {
1010                 spin_lock_irqsave(&ide_lock, flags);
1011                 switch(setting->data_type) {
1012                         case TYPE_BYTE:
1013                                 val = *((u8 *) setting->data);
1014                                 break;
1015                         case TYPE_SHORT:
1016                                 val = *((u16 *) setting->data);
1017                                 break;
1018                         case TYPE_INT:
1019                         case TYPE_INTA:
1020                                 val = *((u32 *) setting->data);
1021                                 break;
1022                 }
1023                 spin_unlock_irqrestore(&ide_lock, flags);
1024         }
1025         return val;
1026 }
1027
1028 /**
1029  *      ide_spin_wait_hwgroup   -       wait for group
1030  *      @drive: drive in the group
1031  *
1032  *      Wait for an IDE device group to go non busy and then return
1033  *      holding the ide_lock which guards the hwgroup->busy status
1034  *      and right to use it.
1035  */
1036
1037 int ide_spin_wait_hwgroup (ide_drive_t *drive)
1038 {
1039         ide_hwgroup_t *hwgroup = HWGROUP(drive);
1040         unsigned long timeout = jiffies + (3 * HZ);
1041
1042         spin_lock_irq(&ide_lock);
1043
1044         while (hwgroup->busy) {
1045                 unsigned long lflags;
1046                 spin_unlock_irq(&ide_lock);
1047                 local_irq_set(lflags);
1048                 if (time_after(jiffies, timeout)) {
1049                         local_irq_restore(lflags);
1050                         printk(KERN_ERR "%s: channel busy\n", drive->name);
1051                         return -EBUSY;
1052                 }
1053                 local_irq_restore(lflags);
1054                 spin_lock_irq(&ide_lock);
1055         }
1056         return 0;
1057 }
1058
1059 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
1060
1061 /**
1062  *      ide_write_setting       -       read an IDE setting
1063  *      @drive: drive to read from
1064  *      @setting: drive setting
1065  *      @val: value
1066  *
1067  *      Write a drive setting if it is possible. The caller
1068  *      must hold the ide_setting_sem when making this call.
1069  *
1070  *      BUGS: the data return and error are the same return value
1071  *      so an error -EINVAL and true return of the same value cannot
1072  *      be told apart
1073  *
1074  *      FIXME:  This should be changed to enqueue a special request
1075  *      to the driver to change settings, and then wait on a sema for completion.
1076  *      The current scheme of polling is kludgy, though safe enough.
1077  */
1078
1079 int ide_write_setting (ide_drive_t *drive, ide_settings_t *setting, int val)
1080 {
1081         int i;
1082         u32 *p;
1083
1084         if (!capable(CAP_SYS_ADMIN))
1085                 return -EACCES;
1086         if (!(setting->rw & SETTING_WRITE))
1087                 return -EPERM;
1088         if (val < setting->min || val > setting->max)
1089                 return -EINVAL;
1090         if (setting->set)
1091                 return setting->set(drive, val);
1092         if (ide_spin_wait_hwgroup(drive))
1093                 return -EBUSY;
1094         switch (setting->data_type) {
1095                 case TYPE_BYTE:
1096                         *((u8 *) setting->data) = val;
1097                         break;
1098                 case TYPE_SHORT:
1099                         *((u16 *) setting->data) = val;
1100                         break;
1101                 case TYPE_INT:
1102                         *((u32 *) setting->data) = val;
1103                         break;
1104                 case TYPE_INTA:
1105                         p = (u32 *) setting->data;
1106                         for (i = 0; i < 1 << PARTN_BITS; i++, p++)
1107                                 *p = val;
1108                         break;
1109         }
1110         spin_unlock_irq(&ide_lock);
1111         return 0;
1112 }
1113
1114 static int set_io_32bit(ide_drive_t *drive, int arg)
1115 {
1116         drive->io_32bit = arg;
1117 #ifdef CONFIG_BLK_DEV_DTC2278
1118         if (HWIF(drive)->chipset == ide_dtc2278)
1119                 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
1120 #endif /* CONFIG_BLK_DEV_DTC2278 */
1121         return 0;
1122 }
1123
1124 static int set_using_dma (ide_drive_t *drive, int arg)
1125 {
1126 #ifdef CONFIG_BLK_DEV_IDEDMA
1127         if (!drive->id || !(drive->id->capability & 1))
1128                 return -EPERM;
1129         if (HWIF(drive)->ide_dma_check == NULL)
1130                 return -EPERM;
1131         if (arg) {
1132                 if (HWIF(drive)->ide_dma_check(drive)) return -EIO;
1133                 if (HWIF(drive)->ide_dma_on(drive)) return -EIO;
1134         } else {
1135                 if (__ide_dma_off(drive))
1136                         return -EIO;
1137         }
1138         return 0;
1139 #else
1140         return -EPERM;
1141 #endif
1142 }
1143
1144 static int set_pio_mode (ide_drive_t *drive, int arg)
1145 {
1146         struct request rq;
1147
1148         if (!HWIF(drive)->tuneproc)
1149                 return -ENOSYS;
1150         if (drive->special.b.set_tune)
1151                 return -EBUSY;
1152         ide_init_drive_cmd(&rq);
1153         drive->tune_req = (u8) arg;
1154         drive->special.b.set_tune = 1;
1155         (void) ide_do_drive_cmd(drive, &rq, ide_wait);
1156         return 0;
1157 }
1158
1159 static int set_xfer_rate (ide_drive_t *drive, int arg)
1160 {
1161         int err = ide_wait_cmd(drive,
1162                         WIN_SETFEATURES, (u8) arg,
1163                         SETFEATURES_XFER, 0, NULL);
1164
1165         if (!err && arg) {
1166                 ide_set_xfer_rate(drive, (u8) arg);
1167                 ide_driveid_update(drive);
1168         }
1169         return err;
1170 }
1171
1172 /**
1173  *      ide_add_generic_settings        -       generic ide settings
1174  *      @drive: drive being configured
1175  *
1176  *      Add the generic parts of the system settings to the /proc files and
1177  *      ioctls for this IDE device. The caller must not be holding the
1178  *      ide_setting_sem.
1179  */
1180
1181 void ide_add_generic_settings (ide_drive_t *drive)
1182 {
1183 /*
1184  *                        drive         setting name            read/write access                               read ioctl              write ioctl             data type       min     max                             mul_factor      div_factor      data pointer                    set function
1185  */
1186         __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);
1187         __ide_add_setting(drive,        "keepsettings",         SETTING_RW,                                     HDIO_GET_KEEPSETTINGS,  HDIO_SET_KEEPSETTINGS,  TYPE_BYTE,      0,      1,                              1,              1,              &drive->keep_settings,          NULL,           0);
1188         __ide_add_setting(drive,        "nice1",                SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->nice1,                  NULL,           0);
1189         __ide_add_setting(drive,        "pio_mode",             SETTING_WRITE,                                  -1,                     HDIO_SET_PIO_MODE,      TYPE_BYTE,      0,      255,                            1,              1,              NULL,                           set_pio_mode,   0);
1190         __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);
1191         __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);
1192         __ide_add_setting(drive,        "init_speed",           SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->init_speed,             NULL,           0);
1193         __ide_add_setting(drive,        "current_speed",        SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->current_speed,          set_xfer_rate,  0);
1194         __ide_add_setting(drive,        "number",               SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      3,                              1,              1,              &drive->dn,                     NULL,           0);
1195 }
1196
1197 /**
1198  *      system_bus_clock        -       clock guess
1199  *
1200  *      External version of the bus clock guess used by very old IDE drivers
1201  *      for things like VLB timings. Should not be used.
1202  */
1203
1204 int system_bus_clock (void)
1205 {
1206         return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
1207 }
1208
1209 EXPORT_SYMBOL(system_bus_clock);
1210
1211 static int generic_ide_suspend(struct device *dev, pm_message_t state)
1212 {
1213         ide_drive_t *drive = dev->driver_data;
1214         struct request rq;
1215         struct request_pm_state rqpm;
1216         ide_task_t args;
1217
1218         memset(&rq, 0, sizeof(rq));
1219         memset(&rqpm, 0, sizeof(rqpm));
1220         memset(&args, 0, sizeof(args));
1221         rq.flags = REQ_PM_SUSPEND;
1222         rq.special = &args;
1223         rq.end_io_data = &rqpm;
1224         rqpm.pm_step = ide_pm_state_start_suspend;
1225         rqpm.pm_state = state.event;
1226
1227         return ide_do_drive_cmd(drive, &rq, ide_wait);
1228 }
1229
1230 static int generic_ide_resume(struct device *dev)
1231 {
1232         ide_drive_t *drive = dev->driver_data;
1233         struct request rq;
1234         struct request_pm_state rqpm;
1235         ide_task_t args;
1236
1237         memset(&rq, 0, sizeof(rq));
1238         memset(&rqpm, 0, sizeof(rqpm));
1239         memset(&args, 0, sizeof(args));
1240         rq.flags = REQ_PM_RESUME;
1241         rq.special = &args;
1242         rq.end_io_data = &rqpm;
1243         rqpm.pm_step = ide_pm_state_start_resume;
1244         rqpm.pm_state = PM_EVENT_ON;
1245
1246         return ide_do_drive_cmd(drive, &rq, ide_head_wait);
1247 }
1248
1249 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
1250                         unsigned int cmd, unsigned long arg)
1251 {
1252         ide_settings_t *setting;
1253         ide_driver_t *drv;
1254         int err = 0;
1255         void __user *p = (void __user *)arg;
1256
1257         down(&ide_setting_sem);
1258         if ((setting = ide_find_setting_by_ioctl(drive, cmd)) != NULL) {
1259                 if (cmd == setting->read_ioctl) {
1260                         err = ide_read_setting(drive, setting);
1261                         up(&ide_setting_sem);
1262                         return err >= 0 ? put_user(err, (long __user *)arg) : err;
1263                 } else {
1264                         if (bdev != bdev->bd_contains)
1265                                 err = -EINVAL;
1266                         else
1267                                 err = ide_write_setting(drive, setting, arg);
1268                         up(&ide_setting_sem);
1269                         return err;
1270                 }
1271         }
1272         up(&ide_setting_sem);
1273
1274         switch (cmd) {
1275                 case HDIO_OBSOLETE_IDENTITY:
1276                 case HDIO_GET_IDENTITY:
1277                         if (bdev != bdev->bd_contains)
1278                                 return -EINVAL;
1279                         if (drive->id_read == 0)
1280                                 return -ENOMSG;
1281                         if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1282                                 return -EFAULT;
1283                         return 0;
1284
1285                 case HDIO_GET_NICE:
1286                         return put_user(drive->dsc_overlap      <<      IDE_NICE_DSC_OVERLAP    |
1287                                         drive->atapi_overlap    <<      IDE_NICE_ATAPI_OVERLAP  |
1288                                         drive->nice0            <<      IDE_NICE_0              |
1289                                         drive->nice1            <<      IDE_NICE_1              |
1290                                         drive->nice2            <<      IDE_NICE_2,
1291                                         (long __user *) arg);
1292
1293 #ifdef CONFIG_IDE_TASK_IOCTL
1294                 case HDIO_DRIVE_TASKFILE:
1295                         if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1296                                 return -EACCES;
1297                         switch(drive->media) {
1298                                 case ide_disk:
1299                                         return ide_taskfile_ioctl(drive, cmd, arg);
1300                                 default:
1301                                         return -ENOMSG;
1302                         }
1303 #endif /* CONFIG_IDE_TASK_IOCTL */
1304
1305                 case HDIO_DRIVE_CMD:
1306                         if (!capable(CAP_SYS_RAWIO))
1307                                 return -EACCES;
1308                         return ide_cmd_ioctl(drive, cmd, arg);
1309
1310                 case HDIO_DRIVE_TASK:
1311                         if (!capable(CAP_SYS_RAWIO))
1312                                 return -EACCES;
1313                         return ide_task_ioctl(drive, cmd, arg);
1314
1315                 case HDIO_SCAN_HWIF:
1316                 {
1317                         hw_regs_t hw;
1318                         int args[3];
1319                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1320                         if (copy_from_user(args, p, 3 * sizeof(int)))
1321                                 return -EFAULT;
1322                         memset(&hw, 0, sizeof(hw));
1323                         ide_init_hwif_ports(&hw, (unsigned long) args[0],
1324                                             (unsigned long) args[1], NULL);
1325                         hw.irq = args[2];
1326                         if (ide_register_hw(&hw, NULL) == -1)
1327                                 return -EIO;
1328                         return 0;
1329                 }
1330                 case HDIO_UNREGISTER_HWIF:
1331                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1332                         /* (arg > MAX_HWIFS) checked in function */
1333                         ide_unregister(arg);
1334                         return 0;
1335                 case HDIO_SET_NICE:
1336                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1337                         if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1338                                 return -EPERM;
1339                         drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1340                         drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1341                         if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1342                                 drive->dsc_overlap = 0;
1343                                 return -EPERM;
1344                         }
1345                         drive->nice1 = (arg >> IDE_NICE_1) & 1;
1346                         return 0;
1347                 case HDIO_DRIVE_RESET:
1348                 {
1349                         unsigned long flags;
1350                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1351
1352                         /*
1353                          *      Abort the current command on the
1354                          *      group if there is one, taking
1355                          *      care not to allow anything else
1356                          *      to be queued and to die on the
1357                          *      spot if we miss one somehow
1358                          */
1359
1360                         spin_lock_irqsave(&ide_lock, flags);
1361
1362                         ide_abort(drive, "drive reset");
1363
1364                         BUG_ON(HWGROUP(drive)->handler);
1365
1366                         /* Ensure nothing gets queued after we
1367                            drop the lock. Reset will clear the busy */
1368
1369                         HWGROUP(drive)->busy = 1;
1370                         spin_unlock_irqrestore(&ide_lock, flags);
1371                         (void) ide_do_reset(drive);
1372
1373                         return 0;
1374                 }
1375
1376                 case CDROMEJECT:
1377                 case CDROMCLOSETRAY:
1378                         return scsi_cmd_ioctl(file, bdev->bd_disk, cmd, p);
1379
1380                 case HDIO_GET_BUSSTATE:
1381                         if (!capable(CAP_SYS_ADMIN))
1382                                 return -EACCES;
1383                         if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1384                                 return -EFAULT;
1385                         return 0;
1386
1387                 case HDIO_SET_BUSSTATE:
1388                         if (!capable(CAP_SYS_ADMIN))
1389                                 return -EACCES;
1390                         if (HWIF(drive)->busproc)
1391                                 return HWIF(drive)->busproc(drive, (int)arg);
1392                         return -EOPNOTSUPP;
1393                 default:
1394                         return -EINVAL;
1395         }
1396 }
1397
1398 EXPORT_SYMBOL(generic_ide_ioctl);
1399
1400 /*
1401  * stridx() returns the offset of c within s,
1402  * or -1 if c is '\0' or not found within s.
1403  */
1404 static int __init stridx (const char *s, char c)
1405 {
1406         char *i = strchr(s, c);
1407         return (i && c) ? i - s : -1;
1408 }
1409
1410 /*
1411  * match_parm() does parsing for ide_setup():
1412  *
1413  * 1. the first char of s must be '='.
1414  * 2. if the remainder matches one of the supplied keywords,
1415  *     the index (1 based) of the keyword is negated and returned.
1416  * 3. if the remainder is a series of no more than max_vals numbers
1417  *     separated by commas, the numbers are saved in vals[] and a
1418  *     count of how many were saved is returned.  Base10 is assumed,
1419  *     and base16 is allowed when prefixed with "0x".
1420  * 4. otherwise, zero is returned.
1421  */
1422 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1423 {
1424         static const char *decimal = "0123456789";
1425         static const char *hex = "0123456789abcdef";
1426         int i, n;
1427
1428         if (*s++ == '=') {
1429                 /*
1430                  * Try matching against the supplied keywords,
1431                  * and return -(index+1) if we match one
1432                  */
1433                 if (keywords != NULL) {
1434                         for (i = 0; *keywords != NULL; ++i) {
1435                                 if (!strcmp(s, *keywords++))
1436                                         return -(i+1);
1437                         }
1438                 }
1439                 /*
1440                  * Look for a series of no more than "max_vals"
1441                  * numeric values separated by commas, in base10,
1442                  * or base16 when prefixed with "0x".
1443                  * Return a count of how many were found.
1444                  */
1445                 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1446                         vals[n] = i;
1447                         while ((i = stridx(decimal, *++s)) >= 0)
1448                                 vals[n] = (vals[n] * 10) + i;
1449                         if (*s == 'x' && !vals[n]) {
1450                                 while ((i = stridx(hex, *++s)) >= 0)
1451                                         vals[n] = (vals[n] * 0x10) + i;
1452                         }
1453                         if (++n == max_vals)
1454                                 break;
1455                         if (*s == ',' || *s == ';')
1456                                 ++s;
1457                 }
1458                 if (!*s)
1459                         return n;
1460         }
1461         return 0;       /* zero = nothing matched */
1462 }
1463
1464 #ifdef CONFIG_BLK_DEV_ALI14XX
1465 static int __initdata probe_ali14xx;
1466 extern int ali14xx_init(void);
1467 #endif
1468 #ifdef CONFIG_BLK_DEV_UMC8672
1469 static int __initdata probe_umc8672;
1470 extern int umc8672_init(void);
1471 #endif
1472 #ifdef CONFIG_BLK_DEV_DTC2278
1473 static int __initdata probe_dtc2278;
1474 extern int dtc2278_init(void);
1475 #endif
1476 #ifdef CONFIG_BLK_DEV_HT6560B
1477 static int __initdata probe_ht6560b;
1478 extern int ht6560b_init(void);
1479 #endif
1480 #ifdef CONFIG_BLK_DEV_QD65XX
1481 static int __initdata probe_qd65xx;
1482 extern int qd65xx_init(void);
1483 #endif
1484
1485 static int __initdata is_chipset_set[MAX_HWIFS];
1486
1487 /*
1488  * ide_setup() gets called VERY EARLY during initialization,
1489  * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1490  *
1491  * Remember to update Documentation/ide.txt if you change something here.
1492  */
1493 static int __init ide_setup(char *s)
1494 {
1495         int i, vals[3];
1496         ide_hwif_t *hwif;
1497         ide_drive_t *drive;
1498         unsigned int hw, unit;
1499         const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1500         const char max_hwif  = '0' + (MAX_HWIFS - 1);
1501
1502
1503         if (strncmp(s,"hd",2) == 0 && s[2] == '=')      /* hd= is for hd.c   */
1504                 return 0;                               /* driver and not us */
1505
1506         if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1507                 return 0;
1508
1509         printk(KERN_INFO "ide_setup: %s", s);
1510         init_ide_data ();
1511
1512 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1513         if (!strcmp(s, "ide=doubler")) {
1514                 extern int ide_doubler;
1515
1516                 printk(" : Enabled support for IDE doublers\n");
1517                 ide_doubler = 1;
1518                 return 1;
1519         }
1520 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1521
1522         if (!strcmp(s, "ide=nodma")) {
1523                 printk(" : Prevented DMA\n");
1524                 noautodma = 1;
1525                 return 1;
1526         }
1527
1528 #ifdef CONFIG_BLK_DEV_IDEPCI
1529         if (!strcmp(s, "ide=reverse")) {
1530                 ide_scan_direction = 1;
1531                 printk(" : Enabled support for IDE inverse scan order.\n");
1532                 return 1;
1533         }
1534 #endif /* CONFIG_BLK_DEV_IDEPCI */
1535
1536         /*
1537          * Look for drive options:  "hdx="
1538          */
1539         if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1540                 const char *hd_words[] = {
1541                         "none", "noprobe", "nowerr", "cdrom", "serialize",
1542                         "autotune", "noautotune", "minus8", "swapdata", "bswap",
1543                         "minus11", "remap", "remap63", "scsi", NULL };
1544                 unit = s[2] - 'a';
1545                 hw   = unit / MAX_DRIVES;
1546                 unit = unit % MAX_DRIVES;
1547                 hwif = &ide_hwifs[hw];
1548                 drive = &hwif->drives[unit];
1549                 if (strncmp(s + 4, "ide-", 4) == 0) {
1550                         strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1551                         goto done;
1552                 }
1553                 switch (match_parm(&s[3], hd_words, vals, 3)) {
1554                         case -1: /* "none" */
1555                         case -2: /* "noprobe" */
1556                                 drive->noprobe = 1;
1557                                 goto done;
1558                         case -3: /* "nowerr" */
1559                                 drive->bad_wstat = BAD_R_STAT;
1560                                 hwif->noprobe = 0;
1561                                 goto done;
1562                         case -4: /* "cdrom" */
1563                                 drive->present = 1;
1564                                 drive->media = ide_cdrom;
1565                                 /* an ATAPI device ignores DRDY */
1566                                 drive->ready_stat = 0;
1567                                 hwif->noprobe = 0;
1568                                 goto done;
1569                         case -5: /* "serialize" */
1570                                 printk(" -- USE \"ide%d=serialize\" INSTEAD", hw);
1571                                 goto do_serialize;
1572                         case -6: /* "autotune" */
1573                                 drive->autotune = IDE_TUNE_AUTO;
1574                                 goto obsolete_option;
1575                         case -7: /* "noautotune" */
1576                                 drive->autotune = IDE_TUNE_NOAUTO;
1577                                 goto obsolete_option;
1578                         case -9: /* "swapdata" */
1579                         case -10: /* "bswap" */
1580                                 drive->bswap = 1;
1581                                 goto done;
1582                         case -12: /* "remap" */
1583                                 drive->remap_0_to_1 = 1;
1584                                 goto done;
1585                         case -13: /* "remap63" */
1586                                 drive->sect0 = 63;
1587                                 goto done;
1588                         case -14: /* "scsi" */
1589                                 drive->scsi = 1;
1590                                 goto done;
1591                         case 3: /* cyl,head,sect */
1592                                 drive->media    = ide_disk;
1593                                 drive->ready_stat = READY_STAT;
1594                                 drive->cyl      = drive->bios_cyl  = vals[0];
1595                                 drive->head     = drive->bios_head = vals[1];
1596                                 drive->sect     = drive->bios_sect = vals[2];
1597                                 drive->present  = 1;
1598                                 drive->forced_geom = 1;
1599                                 hwif->noprobe = 0;
1600                                 goto done;
1601                         default:
1602                                 goto bad_option;
1603                 }
1604         }
1605
1606         if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1607                 goto bad_option;
1608         /*
1609          * Look for bus speed option:  "idebus="
1610          */
1611         if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1612                 if (match_parm(&s[6], NULL, vals, 1) != 1)
1613                         goto bad_option;
1614                 if (vals[0] >= 20 && vals[0] <= 66) {
1615                         idebus_parameter = vals[0];
1616                 } else
1617                         printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1618                 goto done;
1619         }
1620         /*
1621          * Look for interface options:  "idex="
1622          */
1623         if (s[3] >= '0' && s[3] <= max_hwif) {
1624                 /*
1625                  * Be VERY CAREFUL changing this: note hardcoded indexes below
1626                  * (-8, -9, -10) are reserved to ease the hardcoding.
1627                  */
1628                 static const char *ide_words[] = {
1629                         "noprobe", "serialize", "autotune", "noautotune",
1630                         "reset", "dma", "ata66", "minus8", "minus9",
1631                         "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1632                         "dtc2278", "umc8672", "ali14xx", NULL };
1633                 hw = s[3] - '0';
1634                 hwif = &ide_hwifs[hw];
1635                 i = match_parm(&s[4], ide_words, vals, 3);
1636
1637                 /*
1638                  * Cryptic check to ensure chipset not already set for hwif.
1639                  * Note: we can't depend on hwif->chipset here.
1640                  */
1641                 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1642                         /* chipset already specified */
1643                         if (is_chipset_set[hw])
1644                                 goto bad_option;
1645                         if (i > -18 && i <= -11) {
1646                                 /* these drivers are for "ide0=" only */
1647                                 if (hw != 0)
1648                                         goto bad_hwif;
1649                                 /* chipset already specified for 2nd port */
1650                                 if (is_chipset_set[hw+1])
1651                                         goto bad_option;
1652                         }
1653                         is_chipset_set[hw] = 1;
1654                         printk("\n");
1655                 }
1656
1657                 switch (i) {
1658 #ifdef CONFIG_BLK_DEV_ALI14XX
1659                         case -17: /* "ali14xx" */
1660                                 probe_ali14xx = 1;
1661                                 goto done;
1662 #endif
1663 #ifdef CONFIG_BLK_DEV_UMC8672
1664                         case -16: /* "umc8672" */
1665                                 probe_umc8672 = 1;
1666                                 goto done;
1667 #endif
1668 #ifdef CONFIG_BLK_DEV_DTC2278
1669                         case -15: /* "dtc2278" */
1670                                 probe_dtc2278 = 1;
1671                                 goto done;
1672 #endif
1673 #ifdef CONFIG_BLK_DEV_CMD640
1674                         case -14: /* "cmd640_vlb" */
1675                         {
1676                                 extern int cmd640_vlb; /* flag for cmd640.c */
1677                                 cmd640_vlb = 1;
1678                                 goto done;
1679                         }
1680 #endif
1681 #ifdef CONFIG_BLK_DEV_HT6560B
1682                         case -13: /* "ht6560b" */
1683                                 probe_ht6560b = 1;
1684                                 goto done;
1685 #endif
1686 #ifdef CONFIG_BLK_DEV_QD65XX
1687                         case -12: /* "qd65xx" */
1688                                 probe_qd65xx = 1;
1689                                 goto done;
1690 #endif
1691 #ifdef CONFIG_BLK_DEV_4DRIVES
1692                         case -11: /* "four" drives on one set of ports */
1693                         {
1694                                 ide_hwif_t *mate = &ide_hwifs[hw^1];
1695                                 mate->drives[0].select.all ^= 0x20;
1696                                 mate->drives[1].select.all ^= 0x20;
1697                                 hwif->chipset = mate->chipset = ide_4drives;
1698                                 mate->irq = hwif->irq;
1699                                 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1700                                 goto do_serialize;
1701                         }
1702 #endif /* CONFIG_BLK_DEV_4DRIVES */
1703                         case -10: /* minus10 */
1704                         case -9: /* minus9 */
1705                         case -8: /* minus8 */
1706                                 goto bad_option;
1707                         case -7: /* ata66 */
1708 #ifdef CONFIG_BLK_DEV_IDEPCI
1709                                 hwif->udma_four = 1;
1710                                 goto obsolete_option;
1711 #else
1712                                 goto bad_hwif;
1713 #endif
1714                         case -6: /* dma */
1715                                 hwif->autodma = 1;
1716                                 goto obsolete_option;
1717                         case -5: /* "reset" */
1718                                 hwif->reset = 1;
1719                                 goto obsolete_option;
1720                         case -4: /* "noautotune" */
1721                                 hwif->drives[0].autotune = IDE_TUNE_NOAUTO;
1722                                 hwif->drives[1].autotune = IDE_TUNE_NOAUTO;
1723                                 goto obsolete_option;
1724                         case -3: /* "autotune" */
1725                                 hwif->drives[0].autotune = IDE_TUNE_AUTO;
1726                                 hwif->drives[1].autotune = IDE_TUNE_AUTO;
1727                                 goto obsolete_option;
1728                         case -2: /* "serialize" */
1729                         do_serialize:
1730                                 hwif->mate = &ide_hwifs[hw^1];
1731                                 hwif->mate->mate = hwif;
1732                                 hwif->serialized = hwif->mate->serialized = 1;
1733                                 goto obsolete_option;
1734
1735                         case -1: /* "noprobe" */
1736                                 hwif->noprobe = 1;
1737                                 goto done;
1738
1739                         case 1: /* base */
1740                                 vals[1] = vals[0] + 0x206; /* default ctl */
1741                         case 2: /* base,ctl */
1742                                 vals[2] = 0;    /* default irq = probe for it */
1743                         case 3: /* base,ctl,irq */
1744                                 hwif->hw.irq = vals[2];
1745                                 ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq);
1746                                 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
1747                                 hwif->irq      = vals[2];
1748                                 hwif->noprobe  = 0;
1749                                 hwif->chipset  = ide_forced;
1750                                 goto obsolete_option;
1751
1752                         case 0: goto bad_option;
1753                         default:
1754                                 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1755                                 return 1;
1756                 }
1757         }
1758 bad_option:
1759         printk(" -- BAD OPTION\n");
1760         return 1;
1761 obsolete_option:
1762         printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1763         return 1;
1764 bad_hwif:
1765         printk("-- NOT SUPPORTED ON ide%d", hw);
1766 done:
1767         printk("\n");
1768         return 1;
1769 }
1770
1771 extern void pnpide_init(void);
1772 extern void h8300_ide_init(void);
1773
1774 /*
1775  * probe_for_hwifs() finds/initializes "known" IDE interfaces
1776  */
1777 static void __init probe_for_hwifs (void)
1778 {
1779 #ifdef CONFIG_BLK_DEV_IDEPCI
1780         ide_scan_pcibus(ide_scan_direction);
1781 #endif /* CONFIG_BLK_DEV_IDEPCI */
1782
1783 #ifdef CONFIG_ETRAX_IDE
1784         {
1785                 extern void init_e100_ide(void);
1786                 init_e100_ide();
1787         }
1788 #endif /* CONFIG_ETRAX_IDE */
1789 #ifdef CONFIG_BLK_DEV_CMD640
1790         {
1791                 extern void ide_probe_for_cmd640x(void);
1792                 ide_probe_for_cmd640x();
1793         }
1794 #endif /* CONFIG_BLK_DEV_CMD640 */
1795 #ifdef CONFIG_BLK_DEV_IDE_PMAC
1796         {
1797                 extern void pmac_ide_probe(void);
1798                 pmac_ide_probe();
1799         }
1800 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
1801 #ifdef CONFIG_BLK_DEV_GAYLE
1802         {
1803                 extern void gayle_init(void);
1804                 gayle_init();
1805         }
1806 #endif /* CONFIG_BLK_DEV_GAYLE */
1807 #ifdef CONFIG_BLK_DEV_FALCON_IDE
1808         {
1809                 extern void falconide_init(void);
1810                 falconide_init();
1811         }
1812 #endif /* CONFIG_BLK_DEV_FALCON_IDE */
1813 #ifdef CONFIG_BLK_DEV_MAC_IDE
1814         {
1815                 extern void macide_init(void);
1816                 macide_init();
1817         }
1818 #endif /* CONFIG_BLK_DEV_MAC_IDE */
1819 #ifdef CONFIG_BLK_DEV_Q40IDE
1820         {
1821                 extern void q40ide_init(void);
1822                 q40ide_init();
1823         }
1824 #endif /* CONFIG_BLK_DEV_Q40IDE */
1825 #ifdef CONFIG_BLK_DEV_BUDDHA
1826         {
1827                 extern void buddha_init(void);
1828                 buddha_init();
1829         }
1830 #endif /* CONFIG_BLK_DEV_BUDDHA */
1831 #ifdef CONFIG_BLK_DEV_IDEPNP
1832         pnpide_init();
1833 #endif
1834 #ifdef CONFIG_H8300
1835         h8300_ide_init();
1836 #endif
1837 }
1838
1839 void ide_register_subdriver(ide_drive_t *drive, ide_driver_t *driver)
1840 {
1841 #ifdef CONFIG_PROC_FS
1842         ide_add_proc_entries(drive->proc, driver->proc, drive);
1843 #endif
1844 }
1845
1846 EXPORT_SYMBOL(ide_register_subdriver);
1847
1848 /**
1849  *      ide_unregister_subdriver        -       disconnect drive from driver
1850  *      @drive: drive to unplug
1851  *      @driver: driver
1852  *
1853  *      Disconnect a drive from the driver it was attached to and then
1854  *      clean up the various proc files and other objects attached to it.
1855  *
1856  *      Takes ide_setting_sem and ide_lock.
1857  *      Caller must hold none of the locks.
1858  */
1859
1860 void ide_unregister_subdriver(ide_drive_t *drive, ide_driver_t *driver)
1861 {
1862         unsigned long flags;
1863
1864         down(&ide_setting_sem);
1865         spin_lock_irqsave(&ide_lock, flags);
1866 #ifdef CONFIG_PROC_FS
1867         ide_remove_proc_entries(drive->proc, driver->proc);
1868 #endif
1869         auto_remove_settings(drive);
1870         spin_unlock_irqrestore(&ide_lock, flags);
1871         up(&ide_setting_sem);
1872 }
1873
1874 EXPORT_SYMBOL(ide_unregister_subdriver);
1875
1876 /*
1877  * Probe module
1878  */
1879
1880 EXPORT_SYMBOL(ide_lock);
1881
1882 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1883 {
1884         return 1;
1885 }
1886
1887 static char *media_string(ide_drive_t *drive)
1888 {
1889         switch (drive->media) {
1890         case ide_disk:
1891                 return "disk";
1892         case ide_cdrom:
1893                 return "cdrom";
1894         case ide_tape:
1895                 return "tape";
1896         case ide_floppy:
1897                 return "floppy";
1898         default:
1899                 return "UNKNOWN";
1900         }
1901 }
1902
1903 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1904 {
1905         ide_drive_t *drive = to_ide_device(dev);
1906         return sprintf(buf, "%s\n", media_string(drive));
1907 }
1908
1909 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1910 {
1911         ide_drive_t *drive = to_ide_device(dev);
1912         return sprintf(buf, "%s\n", drive->name);
1913 }
1914
1915 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1916 {
1917         ide_drive_t *drive = to_ide_device(dev);
1918         return sprintf(buf, "ide:m-%s\n", media_string(drive));
1919 }
1920
1921 static struct device_attribute ide_dev_attrs[] = {
1922         __ATTR_RO(media),
1923         __ATTR_RO(drivename),
1924         __ATTR_RO(modalias),
1925         __ATTR_NULL
1926 };
1927
1928 static int ide_uevent(struct device *dev, char **envp, int num_envp,
1929                       char *buffer, int buffer_size)
1930 {
1931         ide_drive_t *drive = to_ide_device(dev);
1932         int i = 0;
1933         int length = 0;
1934
1935         add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1936                        "MEDIA=%s", media_string(drive));
1937         add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1938                        "DRIVENAME=%s", drive->name);
1939         add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1940                        "MODALIAS=ide:m-%s", media_string(drive));
1941         envp[i] = NULL;
1942         return 0;
1943 }
1944
1945 static int generic_ide_probe(struct device *dev)
1946 {
1947         ide_drive_t *drive = to_ide_device(dev);
1948         ide_driver_t *drv = to_ide_driver(dev->driver);
1949
1950         return drv->probe ? drv->probe(drive) : -ENODEV;
1951 }
1952
1953 static int generic_ide_remove(struct device *dev)
1954 {
1955         ide_drive_t *drive = to_ide_device(dev);
1956         ide_driver_t *drv = to_ide_driver(dev->driver);
1957
1958         if (drv->remove)
1959                 drv->remove(drive);
1960
1961         return 0;
1962 }
1963
1964 static void generic_ide_shutdown(struct device *dev)
1965 {
1966         ide_drive_t *drive = to_ide_device(dev);
1967         ide_driver_t *drv = to_ide_driver(dev->driver);
1968
1969         if (dev->driver && drv->shutdown)
1970                 drv->shutdown(drive);
1971 }
1972
1973 struct bus_type ide_bus_type = {
1974         .name           = "ide",
1975         .match          = ide_bus_match,
1976         .uevent         = ide_uevent,
1977         .probe          = generic_ide_probe,
1978         .remove         = generic_ide_remove,
1979         .shutdown       = generic_ide_shutdown,
1980         .dev_attrs      = ide_dev_attrs,
1981         .suspend        = generic_ide_suspend,
1982         .resume         = generic_ide_resume,
1983 };
1984
1985 EXPORT_SYMBOL_GPL(ide_bus_type);
1986
1987 /*
1988  * This is gets invoked once during initialization, to set *everything* up
1989  */
1990 static int __init ide_init(void)
1991 {
1992         printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
1993         system_bus_speed = ide_system_bus_speed();
1994
1995         bus_register(&ide_bus_type);
1996
1997         init_ide_data();
1998
1999 #ifdef CONFIG_PROC_FS
2000         proc_ide_root = proc_mkdir("ide", NULL);
2001 #endif
2002
2003 #ifdef CONFIG_BLK_DEV_ALI14XX
2004         if (probe_ali14xx)
2005                 (void)ali14xx_init();
2006 #endif
2007 #ifdef CONFIG_BLK_DEV_UMC8672
2008         if (probe_umc8672)
2009                 (void)umc8672_init();
2010 #endif
2011 #ifdef CONFIG_BLK_DEV_DTC2278
2012         if (probe_dtc2278)
2013                 (void)dtc2278_init();
2014 #endif
2015 #ifdef CONFIG_BLK_DEV_HT6560B
2016         if (probe_ht6560b)
2017                 (void)ht6560b_init();
2018 #endif
2019 #ifdef CONFIG_BLK_DEV_QD65XX
2020         if (probe_qd65xx)
2021                 (void)qd65xx_init();
2022 #endif
2023
2024         initializing = 1;
2025         /* Probe for special PCI and other "known" interface chipsets. */
2026         probe_for_hwifs();
2027         initializing = 0;
2028
2029 #ifdef CONFIG_PROC_FS
2030         proc_ide_create();
2031 #endif
2032         return 0;
2033 }
2034
2035 #ifdef MODULE
2036 static char *options = NULL;
2037 module_param(options, charp, 0);
2038 MODULE_LICENSE("GPL");
2039
2040 static void __init parse_options (char *line)
2041 {
2042         char *next = line;
2043
2044         if (line == NULL || !*line)
2045                 return;
2046         while ((line = next) != NULL) {
2047                 if ((next = strchr(line,' ')) != NULL)
2048                         *next++ = 0;
2049                 if (!ide_setup(line))
2050                         printk (KERN_INFO "Unknown option '%s'\n", line);
2051         }
2052 }
2053
2054 int __init init_module (void)
2055 {
2056         parse_options(options);
2057         return ide_init();
2058 }
2059
2060 void cleanup_module (void)
2061 {
2062         int index;
2063
2064         for (index = 0; index < MAX_HWIFS; ++index)
2065                 ide_unregister(index);
2066
2067 #ifdef CONFIG_PROC_FS
2068         proc_ide_destroy();
2069 #endif
2070
2071         bus_unregister(&ide_bus_type);
2072 }
2073
2074 #else /* !MODULE */
2075
2076 __setup("", ide_setup);
2077
2078 module_init(ide_init);
2079
2080 #endif /* MODULE */