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_host_on           = tmp_hwif->ide_dma_host_on;
 513         hwif->ide_dma_host_off          = tmp_hwif->ide_dma_host_off;
 514         hwif->ide_dma_lostirq           = tmp_hwif->ide_dma_lostirq;
 515         hwif->ide_dma_timeout           = tmp_hwif->ide_dma_timeout;
 516
 517         hwif->OUTB                      = tmp_hwif->OUTB;
 518         hwif->OUTBSYNC                  = tmp_hwif->OUTBSYNC;
 519         hwif->OUTW                      = tmp_hwif->OUTW;
 520         hwif->OUTL                      = tmp_hwif->OUTL;
 521         hwif->OUTSW                     = tmp_hwif->OUTSW;
 522         hwif->OUTSL                     = tmp_hwif->OUTSL;
 523
 524         hwif->INB                       = tmp_hwif->INB;
 525         hwif->INW                       = tmp_hwif->INW;
 526         hwif->INL                       = tmp_hwif->INL;
 527         hwif->INSW                      = tmp_hwif->INSW;
 528         hwif->INSL                      = tmp_hwif->INSL;
 529
 530         hwif->sg_max_nents              = tmp_hwif->sg_max_nents;
 531
 532         hwif->mmio                      = tmp_hwif->mmio;
 533         hwif->rqsize                    = tmp_hwif->rqsize;
 534         hwif->no_lba48                  = tmp_hwif->no_lba48;
 535
 536 #ifndef CONFIG_BLK_DEV_IDECS
 537         hwif->irq                       = tmp_hwif->irq;
 538 #endif
 539
 540         hwif->dma_base                  = tmp_hwif->dma_base;
 541         hwif->dma_master                = tmp_hwif->dma_master;
 542         hwif->dma_command               = tmp_hwif->dma_command;
 543         hwif->dma_vendor1               = tmp_hwif->dma_vendor1;
 544         hwif->dma_status                = tmp_hwif->dma_status;
 545         hwif->dma_vendor3               = tmp_hwif->dma_vendor3;
 546         hwif->dma_prdtable              = tmp_hwif->dma_prdtable;
 547
 548         hwif->config_data               = tmp_hwif->config_data;
 549         hwif->select_data               = tmp_hwif->select_data;
 550         hwif->extra_base                = tmp_hwif->extra_base;
 551         hwif->extra_ports               = tmp_hwif->extra_ports;
 552         hwif->autodma                   = tmp_hwif->autodma;
 553         hwif->udma_four                 = tmp_hwif->udma_four;
 554         hwif->no_dsc                    = tmp_hwif->no_dsc;
 555
 556         hwif->hwif_data                 = tmp_hwif->hwif_data;
 557 }
 558
 559 /**
 560  *      ide_unregister          -       free an IDE interface
 561  *      @index: index of interface (will change soon to a pointer)
 562  *
 563  *      Perform the final unregister of an IDE interface. At the moment
 564  *      we don't refcount interfaces so this will also get split up.
 565  *
 566  *      Locking:
 567  *      The caller must not hold the IDE locks
 568  *      The drive present/vanishing is not yet properly locked
 569  *      Take care with the callbacks. These have been split to avoid
 570  *      deadlocking the IDE layer. The shutdown callback is called
 571  *      before we take the lock and free resources. It is up to the
 572  *      caller to be sure there is no pending I/O here, and that
 573  *      the interface will not be reopened (present/vanishing locking
 574  *      isn't yet done BTW). After we commit to the final kill we
 575  *      call the cleanup callback with the ide locks held.
 576  *
 577  *      Unregister restores the hwif structures to the default state.
 578  *      This is raving bonkers.
 579  */
 580
 581 void ide_unregister(unsigned int index)
 582 {
 583         ide_drive_t *drive;
 584         ide_hwif_t *hwif, *g;
 585         static ide_hwif_t tmp_hwif; /* protected by ide_cfg_sem */
 586         ide_hwgroup_t *hwgroup;
 587         int irq_count = 0, unit;
 588
 589         BUG_ON(index >= MAX_HWIFS);
 590
 591         BUG_ON(in_interrupt());
 592         BUG_ON(irqs_disabled());
 593         down(&ide_cfg_sem);
 594         spin_lock_irq(&ide_lock);
 595         hwif = &ide_hwifs[index];
 596         if (!hwif->present)
 597                 goto abort;
 598         for (unit = 0; unit < MAX_DRIVES; ++unit) {
 599                 drive = &hwif->drives[unit];
 600                 if (!drive->present)
 601                         continue;
 602                 spin_unlock_irq(&ide_lock);
 603                 device_unregister(&drive->gendev);
 604                 wait_for_completion(&drive->gendev_rel_comp);
 605                 spin_lock_irq(&ide_lock);
 606         }
 607         hwif->present = 0;
 608
 609         spin_unlock_irq(&ide_lock);
 610
 611         destroy_proc_ide_interface(hwif);
 612
 613         hwgroup = hwif->hwgroup;
 614         /*
 615          * free the irq if we were the only hwif using it
 616          */
 617         g = hwgroup->hwif;
 618         do {
 619                 if (g->irq == hwif->irq)
 620                         ++irq_count;
 621                 g = g->next;
 622         } while (g != hwgroup->hwif);
 623         if (irq_count == 1)
 624                 free_irq(hwif->irq, hwgroup);
 625
 626         spin_lock_irq(&ide_lock);
 627         /*
 628          * Note that we only release the standard ports,
 629          * and do not even try to handle any extra ports
 630          * allocated for weird IDE interface chipsets.
 631          */
 632         ide_hwif_release_regions(hwif);
 633
 634         /*
 635          * Remove us from the hwgroup, and free
 636          * the hwgroup if we were the only member
 637          */
 638         if (hwif->next == hwif) {
 639                 BUG_ON(hwgroup->hwif != hwif);
 640                 kfree(hwgroup);
 641         } else {
 642                 /* There is another interface in hwgroup.
 643                  * Unlink us, and set hwgroup->drive and ->hwif to
 644                  * something sane.
 645                  */
 646                 g = hwgroup->hwif;
 647                 while (g->next != hwif)
 648                         g = g->next;
 649                 g->next = hwif->next;
 650                 if (hwgroup->hwif == hwif) {
 651                         /* Chose a random hwif for hwgroup->hwif.
 652                          * It's guaranteed that there are no drives
 653                          * left in the hwgroup.
 654                          */
 655                         BUG_ON(hwgroup->drive != NULL);
 656                         hwgroup->hwif = g;
 657                 }
 658                 BUG_ON(hwgroup->hwif == hwif);
 659         }
 660
 661         /* More messed up locking ... */
 662         spin_unlock_irq(&ide_lock);
 663         device_unregister(&hwif->gendev);
 664         wait_for_completion(&hwif->gendev_rel_comp);
 665
 666         /*
 667          * Remove us from the kernel's knowledge
 668          */
 669         blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
 670         kfree(hwif->sg_table);
 671         unregister_blkdev(hwif->major, hwif->name);
 672         spin_lock_irq(&ide_lock);
 673
 674         if (hwif->dma_base) {
 675                 (void) ide_release_dma(hwif);
 676
 677                 hwif->dma_base = 0;
 678                 hwif->dma_master = 0;
 679                 hwif->dma_command = 0;
 680                 hwif->dma_vendor1 = 0;
 681                 hwif->dma_status = 0;
 682                 hwif->dma_vendor3 = 0;
 683                 hwif->dma_prdtable = 0;
 684
 685                 hwif->extra_base  = 0;
 686                 hwif->extra_ports = 0;
 687         }
 688
 689         /* copy original settings */
 690         tmp_hwif = *hwif;
 691
 692         /* restore hwif data to pristine status */
 693         init_hwif_data(hwif, index);
 694         init_hwif_default(hwif, index);
 695
 696         ide_hwif_restore(hwif, &tmp_hwif);
 697
 698 abort:
 699         spin_unlock_irq(&ide_lock);
 700         up(&ide_cfg_sem);
 701 }
 702
 703 EXPORT_SYMBOL(ide_unregister);
 704
 705
 706 /**
 707  *      ide_setup_ports         -       set up IDE interface ports
 708  *      @hw: register descriptions
 709  *      @base: base register
 710  *      @offsets: table of register offsets
 711  *      @ctrl: control register
 712  *      @ack_irq: IRQ ack
 713  *      @irq: interrupt lie
 714  *
 715  *      Setup hw_regs_t structure described by parameters.  You
 716  *      may set up the hw structure yourself OR use this routine to
 717  *      do it for you. This is basically a helper
 718  *
 719  */
 720
 721 void ide_setup_ports (  hw_regs_t *hw,
 722                         unsigned long base, int *offsets,
 723                         unsigned long ctrl, unsigned long intr,
 724                         ide_ack_intr_t *ack_intr,
 725 /*
 726  *                      ide_io_ops_t *iops,
 727  */
 728                         int irq)
 729 {
 730         int i;
 731
 732         memset(hw, 0, sizeof(hw_regs_t));
 733         for (i = 0; i < IDE_NR_PORTS; i++) {
 734                 if (offsets[i] == -1) {
 735                         switch(i) {
 736                                 case IDE_CONTROL_OFFSET:
 737                                         hw->io_ports[i] = ctrl;
 738                                         break;
 739 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
 740                                 case IDE_IRQ_OFFSET:
 741                                         hw->io_ports[i] = intr;
 742                                         break;
 743 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
 744                                 default:
 745                                         hw->io_ports[i] = 0;
 746                                         break;
 747                         }
 748                 } else {
 749                         hw->io_ports[i] = base + offsets[i];
 750                 }
 751         }
 752         hw->irq = irq;
 753         hw->dma = NO_DMA;
 754         hw->ack_intr = ack_intr;
 755 /*
 756  *      hw->iops = iops;
 757  */
 758 }
 759
 760 /**
 761  *      ide_register_hw_with_fixup      -       register IDE interface
 762  *      @hw: hardware registers
 763  *      @hwifp: pointer to returned hwif
 764  *      @fixup: fixup function
 765  *
 766  *      Register an IDE interface, specifying exactly the registers etc.
 767  *      Set init=1 iff calling before probes have taken place.
 768  *
 769  *      Returns -1 on error.
 770  */
 771
 772 int ide_register_hw_with_fixup(hw_regs_t *hw, ide_hwif_t **hwifp, void(*fixup)(ide_hwif_t *hwif))
 773 {
 774         int index, retry = 1;
 775         ide_hwif_t *hwif;
 776
 777         do {
 778                 for (index = 0; index < MAX_HWIFS; ++index) {
 779                         hwif = &ide_hwifs[index];
 780                         if (hwif->hw.io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
 781                                 goto found;
 782                 }
 783                 for (index = 0; index < MAX_HWIFS; ++index) {
 784                         hwif = &ide_hwifs[index];
 785                         if (hwif->hold)
 786                                 continue;
 787                         if ((!hwif->present && !hwif->mate && !initializing) ||
 788                             (!hwif->hw.io_ports[IDE_DATA_OFFSET] && initializing))
 789                                 goto found;
 790                 }
 791                 for (index = 0; index < MAX_HWIFS; index++)
 792                         ide_unregister(index);
 793         } while (retry--);
 794         return -1;
 795 found:
 796         if (hwif->present)
 797                 ide_unregister(index);
 798         else if (!hwif->hold) {
 799                 init_hwif_data(hwif, index);
 800                 init_hwif_default(hwif, index);
 801         }
 802         if (hwif->present)
 803                 return -1;
 804         memcpy(&hwif->hw, hw, sizeof(*hw));
 805         memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports));
 806         hwif->irq = hw->irq;
 807         hwif->noprobe = 0;
 808         hwif->chipset = hw->chipset;
 809         hwif->gendev.parent = hw->dev;
 810
 811         if (!initializing) {
 812                 probe_hwif_init_with_fixup(hwif, fixup);
 813                 create_proc_ide_interfaces();
 814         }
 815
 816         if (hwifp)
 817                 *hwifp = hwif;
 818
 819         return (initializing || hwif->present) ? index : -1;
 820 }
 821
 822 EXPORT_SYMBOL(ide_register_hw_with_fixup);
 823
 824 int ide_register_hw(hw_regs_t *hw, ide_hwif_t **hwifp)
 825 {
 826         return ide_register_hw_with_fixup(hw, hwifp, NULL);
 827 }
 828
 829 EXPORT_SYMBOL(ide_register_hw);
 830
 831 /*
 832  *      Locks for IDE setting functionality
 833  */
 834
 835 DECLARE_MUTEX(ide_setting_sem);
 836
 837 /**
 838  *      __ide_add_setting       -       add an ide setting option
 839  *      @drive: drive to use
 840  *      @name: setting name
 841  *      @rw: true if the function is read write
 842  *      @read_ioctl: function to call on read
 843  *      @write_ioctl: function to call on write
 844  *      @data_type: type of data
 845  *      @min: range minimum
 846  *      @max: range maximum
 847  *      @mul_factor: multiplication scale
 848  *      @div_factor: divison scale
 849  *      @data: private data field
 850  *      @set: setting
 851  *      @auto_remove: setting auto removal flag
 852  *
 853  *      Removes the setting named from the device if it is present.
 854  *      The function takes the settings_lock to protect against
 855  *      parallel changes. This function must not be called from IRQ
 856  *      context. Returns 0 on success or -1 on failure.
 857  *
 858  *      BUGS: This code is seriously over-engineered. There is also
 859  *      magic about how the driver specific features are setup. If
 860  *      a driver is attached we assume the driver settings are auto
 861  *      remove.
 862  */
 863
 864 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)
 865 {
 866         ide_settings_t **p = (ide_settings_t **) &drive->settings, *setting = NULL;
 867
 868         down(&ide_setting_sem);
 869         while ((*p) && strcmp((*p)->name, name) < 0)
 870                 p = &((*p)->next);
 871         if ((setting = kzalloc(sizeof(*setting), GFP_KERNEL)) == NULL)
 872                 goto abort;
 873         if ((setting->name = kmalloc(strlen(name) + 1, GFP_KERNEL)) == NULL)
 874                 goto abort;
 875         strcpy(setting->name, name);
 876         setting->rw = rw;
 877         setting->read_ioctl = read_ioctl;
 878         setting->write_ioctl = write_ioctl;
 879         setting->data_type = data_type;
 880         setting->min = min;
 881         setting->max = max;
 882         setting->mul_factor = mul_factor;
 883         setting->div_factor = div_factor;
 884         setting->data = data;
 885         setting->set = set;
 886
 887         setting->next = *p;
 888         if (auto_remove)
 889                 setting->auto_remove = 1;
 890         *p = setting;
 891         up(&ide_setting_sem);
 892         return 0;
 893 abort:
 894         up(&ide_setting_sem);
 895         kfree(setting);
 896         return -1;
 897 }
 898
 899 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)
 900 {
 901         return __ide_add_setting(drive, name, rw, read_ioctl, write_ioctl, data_type, min, max, mul_factor, div_factor, data, set, 1);
 902 }
 903
 904 EXPORT_SYMBOL(ide_add_setting);
 905
 906 /**
 907  *      __ide_remove_setting    -       remove an ide setting option
 908  *      @drive: drive to use
 909  *      @name: setting name
 910  *
 911  *      Removes the setting named from the device if it is present.
 912  *      The caller must hold the setting semaphore.
 913  */
 914
 915 static void __ide_remove_setting (ide_drive_t *drive, char *name)
 916 {
 917         ide_settings_t **p, *setting;
 918
 919         p = (ide_settings_t **) &drive->settings;
 920
 921         while ((*p) && strcmp((*p)->name, name))
 922                 p = &((*p)->next);
 923         if ((setting = (*p)) == NULL)
 924                 return;
 925
 926         (*p) = setting->next;
 927
 928         kfree(setting->name);
 929         kfree(setting);
 930 }
 931
 932 /**
 933  *      ide_find_setting_by_ioctl       -       find a drive specific ioctl
 934  *      @drive: drive to scan
 935  *      @cmd: ioctl command to handle
 936  *
 937  *      Scan's the device setting table for a matching entry and returns
 938  *      this or NULL if no entry is found. The caller must hold the
 939  *      setting semaphore
 940  */
 941
 942 static ide_settings_t *ide_find_setting_by_ioctl (ide_drive_t *drive, int cmd)
 943 {
 944         ide_settings_t *setting = drive->settings;
 945
 946         while (setting) {
 947                 if (setting->read_ioctl == cmd || setting->write_ioctl == cmd)
 948                         break;
 949                 setting = setting->next;
 950         }
 951
 952         return setting;
 953 }
 954
 955 /**
 956  *      ide_find_setting_by_name        -       find a drive specific setting
 957  *      @drive: drive to scan
 958  *      @name: setting name
 959  *
 960  *      Scan's the device setting table for a matching entry and returns
 961  *      this or NULL if no entry is found. The caller must hold the
 962  *      setting semaphore
 963  */
 964
 965 ide_settings_t *ide_find_setting_by_name (ide_drive_t *drive, char *name)
 966 {
 967         ide_settings_t *setting = drive->settings;
 968
 969         while (setting) {
 970                 if (strcmp(setting->name, name) == 0)
 971                         break;
 972                 setting = setting->next;
 973         }
 974         return setting;
 975 }
 976
 977 /**
 978  *      auto_remove_settings    -       remove driver specific settings
 979  *      @drive: drive
 980  *
 981  *      Automatically remove all the driver specific settings for this
 982  *      drive. This function may not be called from IRQ context. The
 983  *      caller must hold ide_setting_sem.
 984  */
 985
 986 static void auto_remove_settings (ide_drive_t *drive)
 987 {
 988         ide_settings_t *setting;
 989 repeat:
 990         setting = drive->settings;
 991         while (setting) {
 992                 if (setting->auto_remove) {
 993                         __ide_remove_setting(drive, setting->name);
 994                         goto repeat;
 995                 }
 996                 setting = setting->next;
 997         }
 998 }
 999
1000 /**
1001  *      ide_read_setting        -       read an IDE setting
1002  *      @drive: drive to read from
1003  *      @setting: drive setting
1004  *
1005  *      Read a drive setting and return the value. The caller
1006  *      must hold the ide_setting_sem when making this call.
1007  *
1008  *      BUGS: the data return and error are the same return value
1009  *      so an error -EINVAL and true return of the same value cannot
1010  *      be told apart
1011  */
1012
1013 int ide_read_setting (ide_drive_t *drive, ide_settings_t *setting)
1014 {
1015         int             val = -EINVAL;
1016         unsigned long   flags;
1017
1018         if ((setting->rw & SETTING_READ)) {
1019                 spin_lock_irqsave(&ide_lock, flags);
1020                 switch(setting->data_type) {
1021                         case TYPE_BYTE:
1022                                 val = *((u8 *) setting->data);
1023                                 break;
1024                         case TYPE_SHORT:
1025                                 val = *((u16 *) setting->data);
1026                                 break;
1027                         case TYPE_INT:
1028                         case TYPE_INTA:
1029                                 val = *((u32 *) setting->data);
1030                                 break;
1031                 }
1032                 spin_unlock_irqrestore(&ide_lock, flags);
1033         }
1034         return val;
1035 }
1036
1037 /**
1038  *      ide_spin_wait_hwgroup   -       wait for group
1039  *      @drive: drive in the group
1040  *
1041  *      Wait for an IDE device group to go non busy and then return
1042  *      holding the ide_lock which guards the hwgroup->busy status
1043  *      and right to use it.
1044  */
1045
1046 int ide_spin_wait_hwgroup (ide_drive_t *drive)
1047 {
1048         ide_hwgroup_t *hwgroup = HWGROUP(drive);
1049         unsigned long timeout = jiffies + (3 * HZ);
1050
1051         spin_lock_irq(&ide_lock);
1052
1053         while (hwgroup->busy) {
1054                 unsigned long lflags;
1055                 spin_unlock_irq(&ide_lock);
1056                 local_irq_set(lflags);
1057                 if (time_after(jiffies, timeout)) {
1058                         local_irq_restore(lflags);
1059                         printk(KERN_ERR "%s: channel busy\n", drive->name);
1060                         return -EBUSY;
1061                 }
1062                 local_irq_restore(lflags);
1063                 spin_lock_irq(&ide_lock);
1064         }
1065         return 0;
1066 }
1067
1068 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
1069
1070 /**
1071  *      ide_write_setting       -       read an IDE setting
1072  *      @drive: drive to read from
1073  *      @setting: drive setting
1074  *      @val: value
1075  *
1076  *      Write a drive setting if it is possible. The caller
1077  *      must hold the ide_setting_sem when making this call.
1078  *
1079  *      BUGS: the data return and error are the same return value
1080  *      so an error -EINVAL and true return of the same value cannot
1081  *      be told apart
1082  *
1083  *      FIXME:  This should be changed to enqueue a special request
1084  *      to the driver to change settings, and then wait on a sema for completion.
1085  *      The current scheme of polling is kludgy, though safe enough.
1086  */
1087
1088 int ide_write_setting (ide_drive_t *drive, ide_settings_t *setting, int val)
1089 {
1090         int i;
1091         u32 *p;
1092
1093         if (!capable(CAP_SYS_ADMIN))
1094                 return -EACCES;
1095         if (!(setting->rw & SETTING_WRITE))
1096                 return -EPERM;
1097         if (val < setting->min || val > setting->max)
1098                 return -EINVAL;
1099         if (setting->set)
1100                 return setting->set(drive, val);
1101         if (ide_spin_wait_hwgroup(drive))
1102                 return -EBUSY;
1103         switch (setting->data_type) {
1104                 case TYPE_BYTE:
1105                         *((u8 *) setting->data) = val;
1106                         break;
1107                 case TYPE_SHORT:
1108                         *((u16 *) setting->data) = val;
1109                         break;
1110                 case TYPE_INT:
1111                         *((u32 *) setting->data) = val;
1112                         break;
1113                 case TYPE_INTA:
1114                         p = (u32 *) setting->data;
1115                         for (i = 0; i < 1 << PARTN_BITS; i++, p++)
1116                                 *p = val;
1117                         break;
1118         }
1119         spin_unlock_irq(&ide_lock);
1120         return 0;
1121 }
1122
1123 static int set_io_32bit(ide_drive_t *drive, int arg)
1124 {
1125         drive->io_32bit = arg;
1126 #ifdef CONFIG_BLK_DEV_DTC2278
1127         if (HWIF(drive)->chipset == ide_dtc2278)
1128                 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
1129 #endif /* CONFIG_BLK_DEV_DTC2278 */
1130         return 0;
1131 }
1132
1133 static int set_using_dma (ide_drive_t *drive, int arg)
1134 {
1135 #ifdef CONFIG_BLK_DEV_IDEDMA
1136         if (!drive->id || !(drive->id->capability & 1))
1137                 return -EPERM;
1138         if (HWIF(drive)->ide_dma_check == NULL)
1139                 return -EPERM;
1140         if (arg) {
1141                 if (HWIF(drive)->ide_dma_check(drive)) return -EIO;
1142                 if (HWIF(drive)->ide_dma_on(drive)) return -EIO;
1143         } else {
1144                 if (__ide_dma_off(drive))
1145                         return -EIO;
1146         }
1147         return 0;
1148 #else
1149         return -EPERM;
1150 #endif
1151 }
1152
1153 static int set_pio_mode (ide_drive_t *drive, int arg)
1154 {
1155         struct request rq;
1156
1157         if (!HWIF(drive)->tuneproc)
1158                 return -ENOSYS;
1159         if (drive->special.b.set_tune)
1160                 return -EBUSY;
1161         ide_init_drive_cmd(&rq);
1162         drive->tune_req = (u8) arg;
1163         drive->special.b.set_tune = 1;
1164         (void) ide_do_drive_cmd(drive, &rq, ide_wait);
1165         return 0;
1166 }
1167
1168 static int set_xfer_rate (ide_drive_t *drive, int arg)
1169 {
1170         int err = ide_wait_cmd(drive,
1171                         WIN_SETFEATURES, (u8) arg,
1172                         SETFEATURES_XFER, 0, NULL);
1173
1174         if (!err && arg) {
1175                 ide_set_xfer_rate(drive, (u8) arg);
1176                 ide_driveid_update(drive);
1177         }
1178         return err;
1179 }
1180
1181 /**
1182  *      ide_add_generic_settings        -       generic ide settings
1183  *      @drive: drive being configured
1184  *
1185  *      Add the generic parts of the system settings to the /proc files and
1186  *      ioctls for this IDE device. The caller must not be holding the
1187  *      ide_setting_sem.
1188  */
1189
1190 void ide_add_generic_settings (ide_drive_t *drive)
1191 {
1192 /*
1193  *                        drive         setting name            read/write access                               read ioctl              write ioctl             data type       min     max                             mul_factor      div_factor      data pointer                    set function
1194  */
1195         __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);
1196         __ide_add_setting(drive,        "keepsettings",         SETTING_RW,                                     HDIO_GET_KEEPSETTINGS,  HDIO_SET_KEEPSETTINGS,  TYPE_BYTE,      0,      1,                              1,              1,              &drive->keep_settings,          NULL,           0);
1197         __ide_add_setting(drive,        "nice1",                SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->nice1,                  NULL,           0);
1198         __ide_add_setting(drive,        "pio_mode",             SETTING_WRITE,                                  -1,                     HDIO_SET_PIO_MODE,      TYPE_BYTE,      0,      255,                            1,              1,              NULL,                           set_pio_mode,   0);
1199         __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);
1200         __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);
1201         __ide_add_setting(drive,        "init_speed",           SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->init_speed,             NULL,           0);
1202         __ide_add_setting(drive,        "current_speed",        SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->current_speed,          set_xfer_rate,  0);
1203         __ide_add_setting(drive,        "number",               SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      3,                              1,              1,              &drive->dn,                     NULL,           0);
1204 }
1205
1206 /**
1207  *      system_bus_clock        -       clock guess
1208  *
1209  *      External version of the bus clock guess used by very old IDE drivers
1210  *      for things like VLB timings. Should not be used.
1211  */
1212
1213 int system_bus_clock (void)
1214 {
1215         return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
1216 }
1217
1218 EXPORT_SYMBOL(system_bus_clock);
1219
1220 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
1221 {
1222         ide_drive_t *drive = dev->driver_data;
1223         ide_hwif_t *hwif = HWIF(drive);
1224         struct request rq;
1225         struct request_pm_state rqpm;
1226         ide_task_t args;
1227
1228         /* Call ACPI _GTM only once */
1229         if (!(drive->dn % 2))
1230                 ide_acpi_get_timing(hwif);
1231
1232         memset(&rq, 0, sizeof(rq));
1233         memset(&rqpm, 0, sizeof(rqpm));
1234         memset(&args, 0, sizeof(args));
1235         rq.cmd_type = REQ_TYPE_PM_SUSPEND;
1236         rq.special = &args;
1237         rq.data = &rqpm;
1238         rqpm.pm_step = ide_pm_state_start_suspend;
1239         if (mesg.event == PM_EVENT_PRETHAW)
1240                 mesg.event = PM_EVENT_FREEZE;
1241         rqpm.pm_state = mesg.event;
1242
1243         return ide_do_drive_cmd(drive, &rq, ide_wait);
1244 }
1245
1246 static int generic_ide_resume(struct device *dev)
1247 {
1248         ide_drive_t *drive = dev->driver_data;
1249         ide_hwif_t *hwif = HWIF(drive);
1250         struct request rq;
1251         struct request_pm_state rqpm;
1252         ide_task_t args;
1253
1254         /* Call ACPI _STM only once */
1255         if (!(drive->dn % 2))
1256                 ide_acpi_push_timing(hwif);
1257
1258         ide_acpi_exec_tfs(drive);
1259
1260         memset(&rq, 0, sizeof(rq));
1261         memset(&rqpm, 0, sizeof(rqpm));
1262         memset(&args, 0, sizeof(args));
1263         rq.cmd_type = REQ_TYPE_PM_RESUME;
1264         rq.special = &args;
1265         rq.data = &rqpm;
1266         rqpm.pm_step = ide_pm_state_start_resume;
1267         rqpm.pm_state = PM_EVENT_ON;
1268
1269         return ide_do_drive_cmd(drive, &rq, ide_head_wait);
1270 }
1271
1272 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
1273                         unsigned int cmd, unsigned long arg)
1274 {
1275         ide_settings_t *setting;
1276         ide_driver_t *drv;
1277         int err = 0;
1278         void __user *p = (void __user *)arg;
1279
1280         down(&ide_setting_sem);
1281         if ((setting = ide_find_setting_by_ioctl(drive, cmd)) != NULL) {
1282                 if (cmd == setting->read_ioctl) {
1283                         err = ide_read_setting(drive, setting);
1284                         up(&ide_setting_sem);
1285                         return err >= 0 ? put_user(err, (long __user *)arg) : err;
1286                 } else {
1287                         if (bdev != bdev->bd_contains)
1288                                 err = -EINVAL;
1289                         else
1290                                 err = ide_write_setting(drive, setting, arg);
1291                         up(&ide_setting_sem);
1292                         return err;
1293                 }
1294         }
1295         up(&ide_setting_sem);
1296
1297         switch (cmd) {
1298                 case HDIO_OBSOLETE_IDENTITY:
1299                 case HDIO_GET_IDENTITY:
1300                         if (bdev != bdev->bd_contains)
1301                                 return -EINVAL;
1302                         if (drive->id_read == 0)
1303                                 return -ENOMSG;
1304                         if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1305                                 return -EFAULT;
1306                         return 0;
1307
1308                 case HDIO_GET_NICE:
1309                         return put_user(drive->dsc_overlap      <<      IDE_NICE_DSC_OVERLAP    |
1310                                         drive->atapi_overlap    <<      IDE_NICE_ATAPI_OVERLAP  |
1311                                         drive->nice0            <<      IDE_NICE_0              |
1312                                         drive->nice1            <<      IDE_NICE_1              |
1313                                         drive->nice2            <<      IDE_NICE_2,
1314                                         (long __user *) arg);
1315
1316 #ifdef CONFIG_IDE_TASK_IOCTL
1317                 case HDIO_DRIVE_TASKFILE:
1318                         if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1319                                 return -EACCES;
1320                         switch(drive->media) {
1321                                 case ide_disk:
1322                                         return ide_taskfile_ioctl(drive, cmd, arg);
1323                                 default:
1324                                         return -ENOMSG;
1325                         }
1326 #endif /* CONFIG_IDE_TASK_IOCTL */
1327
1328                 case HDIO_DRIVE_CMD:
1329                         if (!capable(CAP_SYS_RAWIO))
1330                                 return -EACCES;
1331                         return ide_cmd_ioctl(drive, cmd, arg);
1332
1333                 case HDIO_DRIVE_TASK:
1334                         if (!capable(CAP_SYS_RAWIO))
1335                                 return -EACCES;
1336                         return ide_task_ioctl(drive, cmd, arg);
1337
1338                 case HDIO_SCAN_HWIF:
1339                 {
1340                         hw_regs_t hw;
1341                         int args[3];
1342                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1343                         if (copy_from_user(args, p, 3 * sizeof(int)))
1344                                 return -EFAULT;
1345                         memset(&hw, 0, sizeof(hw));
1346                         ide_init_hwif_ports(&hw, (unsigned long) args[0],
1347                                             (unsigned long) args[1], NULL);
1348                         hw.irq = args[2];
1349                         if (ide_register_hw(&hw, NULL) == -1)
1350                                 return -EIO;
1351                         return 0;
1352                 }
1353                 case HDIO_UNREGISTER_HWIF:
1354                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1355                         /* (arg > MAX_HWIFS) checked in function */
1356                         ide_unregister(arg);
1357                         return 0;
1358                 case HDIO_SET_NICE:
1359                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1360                         if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1361                                 return -EPERM;
1362                         drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1363                         drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1364                         if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1365                                 drive->dsc_overlap = 0;
1366                                 return -EPERM;
1367                         }
1368                         drive->nice1 = (arg >> IDE_NICE_1) & 1;
1369                         return 0;
1370                 case HDIO_DRIVE_RESET:
1371                 {
1372                         unsigned long flags;
1373                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1374
1375                         /*
1376                          *      Abort the current command on the
1377                          *      group if there is one, taking
1378                          *      care not to allow anything else
1379                          *      to be queued and to die on the
1380                          *      spot if we miss one somehow
1381                          */
1382
1383                         spin_lock_irqsave(&ide_lock, flags);
1384
1385                         if (HWGROUP(drive)->resetting) {
1386                                 spin_unlock_irqrestore(&ide_lock, flags);
1387                                 return -EBUSY;
1388                         }
1389
1390                         ide_abort(drive, "drive reset");
1391
1392                         BUG_ON(HWGROUP(drive)->handler);
1393
1394                         /* Ensure nothing gets queued after we
1395                            drop the lock. Reset will clear the busy */
1396
1397                         HWGROUP(drive)->busy = 1;
1398                         spin_unlock_irqrestore(&ide_lock, flags);
1399                         (void) ide_do_reset(drive);
1400
1401                         return 0;
1402                 }
1403
1404                 case CDROMEJECT:
1405                 case CDROMCLOSETRAY:
1406                         return scsi_cmd_ioctl(file, bdev->bd_disk, cmd, p);
1407
1408                 case HDIO_GET_BUSSTATE:
1409                         if (!capable(CAP_SYS_ADMIN))
1410                                 return -EACCES;
1411                         if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1412                                 return -EFAULT;
1413                         return 0;
1414
1415                 case HDIO_SET_BUSSTATE:
1416                         if (!capable(CAP_SYS_ADMIN))
1417                                 return -EACCES;
1418                         if (HWIF(drive)->busproc)
1419                                 return HWIF(drive)->busproc(drive, (int)arg);
1420                         return -EOPNOTSUPP;
1421                 default:
1422                         return -EINVAL;
1423         }
1424 }
1425
1426 EXPORT_SYMBOL(generic_ide_ioctl);
1427
1428 /*
1429  * stridx() returns the offset of c within s,
1430  * or -1 if c is '\0' or not found within s.
1431  */
1432 static int __init stridx (const char *s, char c)
1433 {
1434         char *i = strchr(s, c);
1435         return (i && c) ? i - s : -1;
1436 }
1437
1438 /*
1439  * match_parm() does parsing for ide_setup():
1440  *
1441  * 1. the first char of s must be '='.
1442  * 2. if the remainder matches one of the supplied keywords,
1443  *     the index (1 based) of the keyword is negated and returned.
1444  * 3. if the remainder is a series of no more than max_vals numbers
1445  *     separated by commas, the numbers are saved in vals[] and a
1446  *     count of how many were saved is returned.  Base10 is assumed,
1447  *     and base16 is allowed when prefixed with "0x".
1448  * 4. otherwise, zero is returned.
1449  */
1450 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1451 {
1452         static const char *decimal = "0123456789";
1453         static const char *hex = "0123456789abcdef";
1454         int i, n;
1455
1456         if (*s++ == '=') {
1457                 /*
1458                  * Try matching against the supplied keywords,
1459                  * and return -(index+1) if we match one
1460                  */
1461                 if (keywords != NULL) {
1462                         for (i = 0; *keywords != NULL; ++i) {
1463                                 if (!strcmp(s, *keywords++))
1464                                         return -(i+1);
1465                         }
1466                 }
1467                 /*
1468                  * Look for a series of no more than "max_vals"
1469                  * numeric values separated by commas, in base10,
1470                  * or base16 when prefixed with "0x".
1471                  * Return a count of how many were found.
1472                  */
1473                 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1474                         vals[n] = i;
1475                         while ((i = stridx(decimal, *++s)) >= 0)
1476                                 vals[n] = (vals[n] * 10) + i;
1477                         if (*s == 'x' && !vals[n]) {
1478                                 while ((i = stridx(hex, *++s)) >= 0)
1479                                         vals[n] = (vals[n] * 0x10) + i;
1480                         }
1481                         if (++n == max_vals)
1482                                 break;
1483                         if (*s == ',' || *s == ';')
1484                                 ++s;
1485                 }
1486                 if (!*s)
1487                         return n;
1488         }
1489         return 0;       /* zero = nothing matched */
1490 }
1491
1492 #ifdef CONFIG_BLK_DEV_ALI14XX
1493 static int __initdata probe_ali14xx;
1494 extern int ali14xx_init(void);
1495 #endif
1496 #ifdef CONFIG_BLK_DEV_UMC8672
1497 static int __initdata probe_umc8672;
1498 extern int umc8672_init(void);
1499 #endif
1500 #ifdef CONFIG_BLK_DEV_DTC2278
1501 static int __initdata probe_dtc2278;
1502 extern int dtc2278_init(void);
1503 #endif
1504 #ifdef CONFIG_BLK_DEV_HT6560B
1505 static int __initdata probe_ht6560b;
1506 extern int ht6560b_init(void);
1507 #endif
1508 #ifdef CONFIG_BLK_DEV_QD65XX
1509 static int __initdata probe_qd65xx;
1510 extern int qd65xx_init(void);
1511 #endif
1512
1513 static int __initdata is_chipset_set[MAX_HWIFS];
1514
1515 /*
1516  * ide_setup() gets called VERY EARLY during initialization,
1517  * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1518  *
1519  * Remember to update Documentation/ide.txt if you change something here.
1520  */
1521 static int __init ide_setup(char *s)
1522 {
1523         int i, vals[3];
1524         ide_hwif_t *hwif;
1525         ide_drive_t *drive;
1526         unsigned int hw, unit;
1527         const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1528         const char max_hwif  = '0' + (MAX_HWIFS - 1);
1529
1530
1531         if (strncmp(s,"hd",2) == 0 && s[2] == '=')      /* hd= is for hd.c   */
1532                 return 0;                               /* driver and not us */
1533
1534         if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1535                 return 0;
1536
1537         printk(KERN_INFO "ide_setup: %s", s);
1538         init_ide_data ();
1539
1540 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1541         if (!strcmp(s, "ide=doubler")) {
1542                 extern int ide_doubler;
1543
1544                 printk(" : Enabled support for IDE doublers\n");
1545                 ide_doubler = 1;
1546                 return 1;
1547         }
1548 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1549
1550         if (!strcmp(s, "ide=nodma")) {
1551                 printk(" : Prevented DMA\n");
1552                 noautodma = 1;
1553                 return 1;
1554         }
1555
1556 #ifdef CONFIG_BLK_DEV_IDEPCI
1557         if (!strcmp(s, "ide=reverse")) {
1558                 ide_scan_direction = 1;
1559                 printk(" : Enabled support for IDE inverse scan order.\n");
1560                 return 1;
1561         }
1562 #endif /* CONFIG_BLK_DEV_IDEPCI */
1563
1564 #ifdef CONFIG_BLK_DEV_IDEACPI
1565         if (!strcmp(s, "ide=noacpi")) {
1566                 //printk(" : Disable IDE ACPI support.\n");
1567                 ide_noacpi = 1;
1568                 return 1;
1569         }
1570         if (!strcmp(s, "ide=acpigtf")) {
1571                 //printk(" : Enable IDE ACPI _GTF support.\n");
1572                 ide_noacpitfs = 0;
1573                 return 1;
1574         }
1575         if (!strcmp(s, "ide=acpionboot")) {
1576                 //printk(" : Call IDE ACPI methods on boot.\n");
1577                 ide_noacpionboot = 0;
1578                 return 1;
1579         }
1580 #endif /* CONFIG_BLK_DEV_IDEACPI */
1581
1582         /*
1583          * Look for drive options:  "hdx="
1584          */
1585         if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1586                 const char *hd_words[] = {
1587                         "none", "noprobe", "nowerr", "cdrom", "serialize",
1588                         "autotune", "noautotune", "minus8", "swapdata", "bswap",
1589                         "noflush", "remap", "remap63", "scsi", NULL };
1590                 unit = s[2] - 'a';
1591                 hw   = unit / MAX_DRIVES;
1592                 unit = unit % MAX_DRIVES;
1593                 hwif = &ide_hwifs[hw];
1594                 drive = &hwif->drives[unit];
1595                 if (strncmp(s + 4, "ide-", 4) == 0) {
1596                         strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1597                         goto done;
1598                 }
1599                 switch (match_parm(&s[3], hd_words, vals, 3)) {
1600                         case -1: /* "none" */
1601                         case -2: /* "noprobe" */
1602                                 drive->noprobe = 1;
1603                                 goto done;
1604                         case -3: /* "nowerr" */
1605                                 drive->bad_wstat = BAD_R_STAT;
1606                                 hwif->noprobe = 0;
1607                                 goto done;
1608                         case -4: /* "cdrom" */
1609                                 drive->present = 1;
1610                                 drive->media = ide_cdrom;
1611                                 /* an ATAPI device ignores DRDY */
1612                                 drive->ready_stat = 0;
1613                                 hwif->noprobe = 0;
1614                                 goto done;
1615                         case -5: /* "serialize" */
1616                                 printk(" -- USE \"ide%d=serialize\" INSTEAD", hw);
1617                                 goto do_serialize;
1618                         case -6: /* "autotune" */
1619                                 drive->autotune = IDE_TUNE_AUTO;
1620                                 goto obsolete_option;
1621                         case -7: /* "noautotune" */
1622                                 drive->autotune = IDE_TUNE_NOAUTO;
1623                                 goto obsolete_option;
1624                         case -9: /* "swapdata" */
1625                         case -10: /* "bswap" */
1626                                 drive->bswap = 1;
1627                                 goto done;
1628                         case -11: /* noflush */
1629                                 drive->noflush = 1;
1630                                 goto done;
1631                         case -12: /* "remap" */
1632                                 drive->remap_0_to_1 = 1;
1633                                 goto done;
1634                         case -13: /* "remap63" */
1635                                 drive->sect0 = 63;
1636                                 goto done;
1637                         case -14: /* "scsi" */
1638                                 drive->scsi = 1;
1639                                 goto done;
1640                         case 3: /* cyl,head,sect */
1641                                 drive->media    = ide_disk;
1642                                 drive->ready_stat = READY_STAT;
1643                                 drive->cyl      = drive->bios_cyl  = vals[0];
1644                                 drive->head     = drive->bios_head = vals[1];
1645                                 drive->sect     = drive->bios_sect = vals[2];
1646                                 drive->present  = 1;
1647                                 drive->forced_geom = 1;
1648                                 hwif->noprobe = 0;
1649                                 goto done;
1650                         default:
1651                                 goto bad_option;
1652                 }
1653         }
1654
1655         if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1656                 goto bad_option;
1657         /*
1658          * Look for bus speed option:  "idebus="
1659          */
1660         if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1661                 if (match_parm(&s[6], NULL, vals, 1) != 1)
1662                         goto bad_option;
1663                 if (vals[0] >= 20 && vals[0] <= 66) {
1664                         idebus_parameter = vals[0];
1665                 } else
1666                         printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1667                 goto done;
1668         }
1669         /*
1670          * Look for interface options:  "idex="
1671          */
1672         if (s[3] >= '0' && s[3] <= max_hwif) {
1673                 /*
1674                  * Be VERY CAREFUL changing this: note hardcoded indexes below
1675                  * (-8, -9, -10) are reserved to ease the hardcoding.
1676                  */
1677                 static const char *ide_words[] = {
1678                         "noprobe", "serialize", "autotune", "noautotune",
1679                         "reset", "dma", "ata66", "minus8", "minus9",
1680                         "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1681                         "dtc2278", "umc8672", "ali14xx", NULL };
1682                 hw = s[3] - '0';
1683                 hwif = &ide_hwifs[hw];
1684                 i = match_parm(&s[4], ide_words, vals, 3);
1685
1686                 /*
1687                  * Cryptic check to ensure chipset not already set for hwif.
1688                  * Note: we can't depend on hwif->chipset here.
1689                  */
1690                 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1691                         /* chipset already specified */
1692                         if (is_chipset_set[hw])
1693                                 goto bad_option;
1694                         if (i > -18 && i <= -11) {
1695                                 /* these drivers are for "ide0=" only */
1696                                 if (hw != 0)
1697                                         goto bad_hwif;
1698                                 /* chipset already specified for 2nd port */
1699                                 if (is_chipset_set[hw+1])
1700                                         goto bad_option;
1701                         }
1702                         is_chipset_set[hw] = 1;
1703                         printk("\n");
1704                 }
1705
1706                 switch (i) {
1707 #ifdef CONFIG_BLK_DEV_ALI14XX
1708                         case -17: /* "ali14xx" */
1709                                 probe_ali14xx = 1;
1710                                 goto done;
1711 #endif
1712 #ifdef CONFIG_BLK_DEV_UMC8672
1713                         case -16: /* "umc8672" */
1714                                 probe_umc8672 = 1;
1715                                 goto done;
1716 #endif
1717 #ifdef CONFIG_BLK_DEV_DTC2278
1718                         case -15: /* "dtc2278" */
1719                                 probe_dtc2278 = 1;
1720                                 goto done;
1721 #endif
1722 #ifdef CONFIG_BLK_DEV_CMD640
1723                         case -14: /* "cmd640_vlb" */
1724                         {
1725                                 extern int cmd640_vlb; /* flag for cmd640.c */
1726                                 cmd640_vlb = 1;
1727                                 goto done;
1728                         }
1729 #endif
1730 #ifdef CONFIG_BLK_DEV_HT6560B
1731                         case -13: /* "ht6560b" */
1732                                 probe_ht6560b = 1;
1733                                 goto done;
1734 #endif
1735 #ifdef CONFIG_BLK_DEV_QD65XX
1736                         case -12: /* "qd65xx" */
1737                                 probe_qd65xx = 1;
1738                                 goto done;
1739 #endif
1740 #ifdef CONFIG_BLK_DEV_4DRIVES
1741                         case -11: /* "four" drives on one set of ports */
1742                         {
1743                                 ide_hwif_t *mate = &ide_hwifs[hw^1];
1744                                 mate->drives[0].select.all ^= 0x20;
1745                                 mate->drives[1].select.all ^= 0x20;
1746                                 hwif->chipset = mate->chipset = ide_4drives;
1747                                 mate->irq = hwif->irq;
1748                                 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1749                                 goto do_serialize;
1750                         }
1751 #endif /* CONFIG_BLK_DEV_4DRIVES */
1752                         case -10: /* minus10 */
1753                         case -9: /* minus9 */
1754                         case -8: /* minus8 */
1755                                 goto bad_option;
1756                         case -7: /* ata66 */
1757 #ifdef CONFIG_BLK_DEV_IDEPCI
1758                                 hwif->udma_four = 1;
1759                                 goto obsolete_option;
1760 #else
1761                                 goto bad_hwif;
1762 #endif
1763                         case -6: /* dma */
1764                                 hwif->autodma = 1;
1765                                 goto obsolete_option;
1766                         case -5: /* "reset" */
1767                                 hwif->reset = 1;
1768                                 goto obsolete_option;
1769                         case -4: /* "noautotune" */
1770                                 hwif->drives[0].autotune = IDE_TUNE_NOAUTO;
1771                                 hwif->drives[1].autotune = IDE_TUNE_NOAUTO;
1772                                 goto obsolete_option;
1773                         case -3: /* "autotune" */
1774                                 hwif->drives[0].autotune = IDE_TUNE_AUTO;
1775                                 hwif->drives[1].autotune = IDE_TUNE_AUTO;
1776                                 goto obsolete_option;
1777                         case -2: /* "serialize" */
1778                         do_serialize:
1779                                 hwif->mate = &ide_hwifs[hw^1];
1780                                 hwif->mate->mate = hwif;
1781                                 hwif->serialized = hwif->mate->serialized = 1;
1782                                 goto obsolete_option;
1783
1784                         case -1: /* "noprobe" */
1785                                 hwif->noprobe = 1;
1786                                 goto done;
1787
1788                         case 1: /* base */
1789                                 vals[1] = vals[0] + 0x206; /* default ctl */
1790                         case 2: /* base,ctl */
1791                                 vals[2] = 0;    /* default irq = probe for it */
1792                         case 3: /* base,ctl,irq */
1793                                 hwif->hw.irq = vals[2];
1794                                 ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq);
1795                                 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
1796                                 hwif->irq      = vals[2];
1797                                 hwif->noprobe  = 0;
1798                                 hwif->chipset  = ide_forced;
1799                                 goto obsolete_option;
1800
1801                         case 0: goto bad_option;
1802                         default:
1803                                 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1804                                 return 1;
1805                 }
1806         }
1807 bad_option:
1808         printk(" -- BAD OPTION\n");
1809         return 1;
1810 obsolete_option:
1811         printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1812         return 1;
1813 bad_hwif:
1814         printk("-- NOT SUPPORTED ON ide%d", hw);
1815 done:
1816         printk("\n");
1817         return 1;
1818 }
1819
1820 extern void __init pnpide_init(void);
1821 extern void __exit pnpide_exit(void);
1822 extern void __init h8300_ide_init(void);
1823
1824 /*
1825  * probe_for_hwifs() finds/initializes "known" IDE interfaces
1826  */
1827 static void __init probe_for_hwifs (void)
1828 {
1829 #ifdef CONFIG_BLK_DEV_IDEPCI
1830         ide_scan_pcibus(ide_scan_direction);
1831 #endif /* CONFIG_BLK_DEV_IDEPCI */
1832
1833 #ifdef CONFIG_ETRAX_IDE
1834         {
1835                 extern void init_e100_ide(void);
1836                 init_e100_ide();
1837         }
1838 #endif /* CONFIG_ETRAX_IDE */
1839 #ifdef CONFIG_BLK_DEV_CMD640
1840         {
1841                 extern void ide_probe_for_cmd640x(void);
1842                 ide_probe_for_cmd640x();
1843         }
1844 #endif /* CONFIG_BLK_DEV_CMD640 */
1845 #ifdef CONFIG_BLK_DEV_IDE_PMAC
1846         {
1847                 extern void pmac_ide_probe(void);
1848                 pmac_ide_probe();
1849         }
1850 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
1851 #ifdef CONFIG_BLK_DEV_GAYLE
1852         {
1853                 extern void gayle_init(void);
1854                 gayle_init();
1855         }
1856 #endif /* CONFIG_BLK_DEV_GAYLE */
1857 #ifdef CONFIG_BLK_DEV_FALCON_IDE
1858         {
1859                 extern void falconide_init(void);
1860                 falconide_init();
1861         }
1862 #endif /* CONFIG_BLK_DEV_FALCON_IDE */
1863 #ifdef CONFIG_BLK_DEV_MAC_IDE
1864         {
1865                 extern void macide_init(void);
1866                 macide_init();
1867         }
1868 #endif /* CONFIG_BLK_DEV_MAC_IDE */
1869 #ifdef CONFIG_BLK_DEV_Q40IDE
1870         {
1871                 extern void q40ide_init(void);
1872                 q40ide_init();
1873         }
1874 #endif /* CONFIG_BLK_DEV_Q40IDE */
1875 #ifdef CONFIG_BLK_DEV_BUDDHA
1876         {
1877                 extern void buddha_init(void);
1878                 buddha_init();
1879         }
1880 #endif /* CONFIG_BLK_DEV_BUDDHA */
1881 #ifdef CONFIG_BLK_DEV_IDEPNP
1882         pnpide_init();
1883 #endif
1884 #ifdef CONFIG_H8300
1885         h8300_ide_init();
1886 #endif
1887 }
1888
1889 void ide_register_subdriver(ide_drive_t *drive, ide_driver_t *driver)
1890 {
1891 #ifdef CONFIG_PROC_FS
1892         ide_add_proc_entries(drive->proc, driver->proc, drive);
1893 #endif
1894 }
1895
1896 EXPORT_SYMBOL(ide_register_subdriver);
1897
1898 /**
1899  *      ide_unregister_subdriver        -       disconnect drive from driver
1900  *      @drive: drive to unplug
1901  *      @driver: driver
1902  *
1903  *      Disconnect a drive from the driver it was attached to and then
1904  *      clean up the various proc files and other objects attached to it.
1905  *
1906  *      Takes ide_setting_sem and ide_lock.
1907  *      Caller must hold none of the locks.
1908  */
1909
1910 void ide_unregister_subdriver(ide_drive_t *drive, ide_driver_t *driver)
1911 {
1912         unsigned long flags;
1913
1914 #ifdef CONFIG_PROC_FS
1915         ide_remove_proc_entries(drive->proc, driver->proc);
1916 #endif
1917         down(&ide_setting_sem);
1918         spin_lock_irqsave(&ide_lock, flags);
1919         /*
1920          * ide_setting_sem protects the settings list
1921          * ide_lock protects the use of settings
1922          *
1923          * so we need to hold both, ide_settings_sem because we want to
1924          * modify the settings list, and ide_lock because we cannot take
1925          * a setting out that is being used.
1926          *
1927          * OTOH both ide_{read,write}_setting are only ever used under
1928          * ide_setting_sem.
1929          */
1930         auto_remove_settings(drive);
1931         spin_unlock_irqrestore(&ide_lock, flags);
1932         up(&ide_setting_sem);
1933 }
1934
1935 EXPORT_SYMBOL(ide_unregister_subdriver);
1936
1937 /*
1938  * Probe module
1939  */
1940
1941 EXPORT_SYMBOL(ide_lock);
1942
1943 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1944 {
1945         return 1;
1946 }
1947
1948 static char *media_string(ide_drive_t *drive)
1949 {
1950         switch (drive->media) {
1951         case ide_disk:
1952                 return "disk";
1953         case ide_cdrom:
1954                 return "cdrom";
1955         case ide_tape:
1956                 return "tape";
1957         case ide_floppy:
1958                 return "floppy";
1959         default:
1960                 return "UNKNOWN";
1961         }
1962 }
1963
1964 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1965 {
1966         ide_drive_t *drive = to_ide_device(dev);
1967         return sprintf(buf, "%s\n", media_string(drive));
1968 }
1969
1970 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1971 {
1972         ide_drive_t *drive = to_ide_device(dev);
1973         return sprintf(buf, "%s\n", drive->name);
1974 }
1975
1976 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1977 {
1978         ide_drive_t *drive = to_ide_device(dev);
1979         return sprintf(buf, "ide:m-%s\n", media_string(drive));
1980 }
1981
1982 static struct device_attribute ide_dev_attrs[] = {
1983         __ATTR_RO(media),
1984         __ATTR_RO(drivename),
1985         __ATTR_RO(modalias),
1986         __ATTR_NULL
1987 };
1988
1989 static int ide_uevent(struct device *dev, char **envp, int num_envp,
1990                       char *buffer, int buffer_size)
1991 {
1992         ide_drive_t *drive = to_ide_device(dev);
1993         int i = 0;
1994         int length = 0;
1995
1996         add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1997                        "MEDIA=%s", media_string(drive));
1998         add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1999                        "DRIVENAME=%s", drive->name);
2000         add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
2001                        "MODALIAS=ide:m-%s", media_string(drive));
2002         envp[i] = NULL;
2003         return 0;
2004 }
2005
2006 static int generic_ide_probe(struct device *dev)
2007 {
2008         ide_drive_t *drive = to_ide_device(dev);
2009         ide_driver_t *drv = to_ide_driver(dev->driver);
2010
2011         return drv->probe ? drv->probe(drive) : -ENODEV;
2012 }
2013
2014 static int generic_ide_remove(struct device *dev)
2015 {
2016         ide_drive_t *drive = to_ide_device(dev);
2017         ide_driver_t *drv = to_ide_driver(dev->driver);
2018
2019         if (drv->remove)
2020                 drv->remove(drive);
2021
2022         return 0;
2023 }
2024
2025 static void generic_ide_shutdown(struct device *dev)
2026 {
2027         ide_drive_t *drive = to_ide_device(dev);
2028         ide_driver_t *drv = to_ide_driver(dev->driver);
2029
2030         if (dev->driver && drv->shutdown)
2031                 drv->shutdown(drive);
2032 }
2033
2034 struct bus_type ide_bus_type = {
2035         .name           = "ide",
2036         .match          = ide_bus_match,
2037         .uevent         = ide_uevent,
2038         .probe          = generic_ide_probe,
2039         .remove         = generic_ide_remove,
2040         .shutdown       = generic_ide_shutdown,
2041         .dev_attrs      = ide_dev_attrs,
2042         .suspend        = generic_ide_suspend,
2043         .resume         = generic_ide_resume,
2044 };
2045
2046 EXPORT_SYMBOL_GPL(ide_bus_type);
2047
2048 /*
2049  * This is gets invoked once during initialization, to set *everything* up
2050  */
2051 static int __init ide_init(void)
2052 {
2053         int ret;
2054
2055         printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
2056         system_bus_speed = ide_system_bus_speed();
2057
2058         ret = bus_register(&ide_bus_type);
2059         if (ret < 0) {
2060                 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
2061                 return ret;
2062         }
2063
2064         init_ide_data();
2065
2066 #ifdef CONFIG_PROC_FS
2067         proc_ide_root = proc_mkdir("ide", NULL);
2068 #endif
2069
2070 #ifdef CONFIG_BLK_DEV_ALI14XX
2071         if (probe_ali14xx)
2072                 (void)ali14xx_init();
2073 #endif
2074 #ifdef CONFIG_BLK_DEV_UMC8672
2075         if (probe_umc8672)
2076                 (void)umc8672_init();
2077 #endif
2078 #ifdef CONFIG_BLK_DEV_DTC2278
2079         if (probe_dtc2278)
2080                 (void)dtc2278_init();
2081 #endif
2082 #ifdef CONFIG_BLK_DEV_HT6560B
2083         if (probe_ht6560b)
2084                 (void)ht6560b_init();
2085 #endif
2086 #ifdef CONFIG_BLK_DEV_QD65XX
2087         if (probe_qd65xx)
2088                 (void)qd65xx_init();
2089 #endif
2090
2091         initializing = 1;
2092         /* Probe for special PCI and other "known" interface chipsets. */
2093         probe_for_hwifs();
2094         initializing = 0;
2095
2096 #ifdef CONFIG_PROC_FS
2097         proc_ide_create();
2098 #endif
2099         return 0;
2100 }
2101
2102 #ifdef MODULE
2103 static char *options = NULL;
2104 module_param(options, charp, 0);
2105 MODULE_LICENSE("GPL");
2106
2107 static void __init parse_options (char *line)
2108 {
2109         char *next = line;
2110
2111         if (line == NULL || !*line)
2112                 return;
2113         while ((line = next) != NULL) {
2114                 if ((next = strchr(line,' ')) != NULL)
2115                         *next++ = 0;
2116                 if (!ide_setup(line))
2117                         printk (KERN_INFO "Unknown option '%s'\n", line);
2118         }
2119 }
2120
2121 int __init init_module (void)
2122 {
2123         parse_options(options);
2124         return ide_init();
2125 }
2126
2127 void __exit cleanup_module (void)
2128 {
2129         int index;
2130
2131         for (index = 0; index < MAX_HWIFS; ++index)
2132                 ide_unregister(index);
2133
2134 #ifdef CONFIG_BLK_DEV_IDEPNP
2135         pnpide_exit();
2136 #endif
2137
2138 #ifdef CONFIG_PROC_FS
2139         proc_ide_destroy();
2140 #endif
2141
2142         bus_unregister(&ide_bus_type);
2143 }
2144
2145 #else /* !MODULE */
2146
2147 __setup("", ide_setup);
2148
2149 module_init(ide_init);
2150
2151 #endif /* MODULE */