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   1 /*
   2  *  linux/drivers/ide/ide.c             Version 7.00beta2       Mar 05 2003
   3  *
   4  *  Copyright (C) 1994-1998  Linus Torvalds & authors (see below)
   5  */
   6
   7 /*
   8  *  Mostly written by Mark Lord  <mlord@pobox.com>
   9  *                and Gadi Oxman <gadio@netvision.net.il>
  10  *                and Andre Hedrick <andre@linux-ide.org>
  11  *
  12  *  See linux/MAINTAINERS for address of current maintainer.
  13  *
  14  * This is the multiple IDE interface driver, as evolved from hd.c.
  15  * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs
  16  *   (usually 14 & 15).
  17  * There can be up to two drives per interface, as per the ATA-2 spec.
  18  *
  19  * Primary:    ide0, port 0x1f0; major=3;  hda is minor=0; hdb is minor=64
  20  * Secondary:  ide1, port 0x170; major=22; hdc is minor=0; hdd is minor=64
  21  * Tertiary:   ide2, port 0x???; major=33; hde is minor=0; hdf is minor=64
  22  * Quaternary: ide3, port 0x???; major=34; hdg is minor=0; hdh is minor=64
  23  * ...
  24  *
  25  *  From hd.c:
  26  *  |
  27  *  | It traverses the request-list, using interrupts to jump between functions.
  28  *  | As nearly all functions can be called within interrupts, we may not sleep.
  29  *  | Special care is recommended.  Have Fun!
  30  *  |
  31  *  | modified by Drew Eckhardt to check nr of hd's from the CMOS.
  32  *  |
  33  *  | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
  34  *  | in the early extended-partition checks and added DM partitions.
  35  *  |
  36  *  | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
  37  *  |
  38  *  | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
  39  *  | and general streamlining by Mark Lord (mlord@pobox.com).
  40  *
  41  *  October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
  42  *
  43  *      Mark Lord       (mlord@pobox.com)               (IDE Perf.Pkg)
  44  *      Delman Lee      (delman@ieee.org)               ("Mr. atdisk2")
  45  *      Scott Snyder    (snyder@fnald0.fnal.gov)        (ATAPI IDE cd-rom)
  46  *
  47  *  This was a rewrite of just about everything from hd.c, though some original
  48  *  code is still sprinkled about.  Think of it as a major evolution, with
  49  *  inspiration from lots of linux users, esp.  hamish@zot.apana.org.au
  50  *
  51  *  Version 1.0 ALPHA   initial code, primary i/f working okay
  52  *  Version 1.3 BETA    dual i/f on shared irq tested & working!
  53  *  Version 1.4 BETA    added auto probing for irq(s)
  54  *  Version 1.5 BETA    added ALPHA (untested) support for IDE cd-roms,
  55  *  ...
  56  * Version 5.50         allow values as small as 20 for idebus=
  57  * Version 5.51         force non io_32bit in drive_cmd_intr()
  58  *                      change delay_10ms() to delay_50ms() to fix problems
  59  * Version 5.52         fix incorrect invalidation of removable devices
  60  *                      add "hdx=slow" command line option
  61  * Version 5.60         start to modularize the driver; the disk and ATAPI
  62  *                       drivers can be compiled as loadable modules.
  63  *                      move IDE probe code to ide-probe.c
  64  *                      move IDE disk code to ide-disk.c
  65  *                      add support for generic IDE device subdrivers
  66  *                      add m68k code from Geert Uytterhoeven
  67  *                      probe all interfaces by default
  68  *                      add ioctl to (re)probe an interface
  69  * Version 6.00         use per device request queues
  70  *                      attempt to optimize shared hwgroup performance
  71  *                      add ioctl to manually adjust bandwidth algorithms
  72  *                      add kerneld support for the probe module
  73  *                      fix bug in ide_error()
  74  *                      fix bug in the first ide_get_lock() call for Atari
  75  *                      don't flush leftover data for ATAPI devices
  76  * Version 6.01         clear hwgroup->active while the hwgroup sleeps
  77  *                      support HDIO_GETGEO for floppies
  78  * Version 6.02         fix ide_ack_intr() call
  79  *                      check partition table on floppies
  80  * Version 6.03         handle bad status bit sequencing in ide_wait_stat()
  81  * Version 6.10         deleted old entries from this list of updates
  82  *                      replaced triton.c with ide-dma.c generic PCI DMA
  83  *                      added support for BIOS-enabled UltraDMA
  84  *                      rename all "promise" things to "pdc4030"
  85  *                      fix EZ-DRIVE handling on small disks
  86  * Version 6.11         fix probe error in ide_scan_devices()
  87  *                      fix ancient "jiffies" polling bugs
  88  *                      mask all hwgroup interrupts on each irq entry
  89  * Version 6.12         integrate ioctl and proc interfaces
  90  *                      fix parsing of "idex=" command line parameter
  91  * Version 6.13         add support for ide4/ide5 courtesy rjones@orchestream.com
  92  * Version 6.14         fixed IRQ sharing among PCI devices
  93  * Version 6.15         added SMP awareness to IDE drivers
  94  * Version 6.16         fixed various bugs; even more SMP friendly
  95  * Version 6.17         fix for newest EZ-Drive problem
  96  * Version 6.18         default unpartitioned-disk translation now "BIOS LBA"
  97  * Version 6.19         Re-design for a UNIFORM driver for all platforms,
  98  *                        model based on suggestions from Russell King and
  99  *                        Geert Uytterhoeven
 100  *                      Promise DC4030VL now supported.
 101  *                      add support for ide6/ide7
 102  *                      delay_50ms() changed to ide_delay_50ms() and exported.
 103  * Version 6.20         Added/Fixed Generic ATA-66 support and hwif detection.
 104  *                      Added hdx=flash to allow for second flash disk
 105  *                        detection w/o the hang loop.
 106  *                      Added support for ide8/ide9
 107  *                      Added idex=ata66 for the quirky chipsets that are
 108  *                        ATA-66 compliant, but have yet to determine a method
 109  *                        of verification of the 80c cable presence.
 110  *                        Specifically Promise's PDC20262 chipset.
 111  * Version 6.21         Fixing/Fixed SMP spinlock issue with insight from an old
 112  *                        hat that clarified original low level driver design.
 113  * Version 6.30         Added SMP support; fixed multmode issues.  -ml
 114  * Version 6.31         Debug Share INTR's and request queue streaming
 115  *                      Native ATA-100 support
 116  *                      Prep for Cascades Project
 117  * Version 7.00alpha    First named revision of ide rearrange
 118  *
 119  *  Some additional driver compile-time options are in ./include/linux/ide.h
 120  *
 121  *  To do, in likely order of completion:
 122  *      - modify kernel to obtain BIOS geometry for drives on 2nd/3rd/4th i/f
 123  *
 124  */
 125
 126 #define REVISION        "Revision: 7.00alpha2"
 127 #define VERSION         "Id: ide.c 7.00a2 20020906"
 128
 129 #undef REALLY_SLOW_IO           /* most systems can safely undef this */
 130
 131 #define _IDE_C                  /* Tell ide.h it's really us */
 132
 133 #include <linux/module.h>
 134 #include <linux/types.h>
 135 #include <linux/string.h>
 136 #include <linux/kernel.h>
 137 #include <linux/timer.h>
 138 #include <linux/mm.h>
 139 #include <linux/interrupt.h>
 140 #include <linux/major.h>
 141 #include <linux/errno.h>
 142 #include <linux/genhd.h>
 143 #include <linux/blkpg.h>
 144 #include <linux/slab.h>
 145 #include <linux/init.h>
 146 #include <linux/pci.h>
 147 #include <linux/delay.h>
 148 #include <linux/ide.h>
 149 #include <linux/completion.h>
 150 #include <linux/reboot.h>
 151 #include <linux/cdrom.h>
 152 #include <linux/seq_file.h>
 153 #include <linux/device.h>
 154 #include <linux/bitops.h>
 155
 156 #include <asm/byteorder.h>
 157 #include <asm/irq.h>
 158 #include <asm/uaccess.h>
 159 #include <asm/io.h>
 160
 161
 162 /* default maximum number of failures */
 163 #define IDE_DEFAULT_MAX_FAILURES        1
 164
 165 static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
 166                                         IDE2_MAJOR, IDE3_MAJOR,
 167                                         IDE4_MAJOR, IDE5_MAJOR,
 168                                         IDE6_MAJOR, IDE7_MAJOR,
 169                                         IDE8_MAJOR, IDE9_MAJOR };
 170
 171 static int idebus_parameter;    /* holds the "idebus=" parameter */
 172 static int system_bus_speed;    /* holds what we think is VESA/PCI bus speed */
 173 static int initializing;        /* set while initializing built-in drivers */
 174
 175 DECLARE_MUTEX(ide_cfg_sem);
 176  __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
 177
 178 #ifdef CONFIG_BLK_DEV_IDEPCI
 179 static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
 180 #endif
 181
 182 #ifdef CONFIG_IDEDMA_AUTO
 183 int noautodma = 0;
 184 #else
 185 int noautodma = 1;
 186 #endif
 187
 188 EXPORT_SYMBOL(noautodma);
 189
 190 #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)
 393                 return 0;
 394         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
 395         if (addr && !hwif_request_region(hwif, addr, 1))
 396                 goto control_region_busy;
 397         hwif->straight8 = 0;
 398         addr = hwif->io_ports[IDE_DATA_OFFSET];
 399         if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
 400                 if (!hwif_request_region(hwif, addr, 8))
 401                         goto data_region_busy;
 402                 hwif->straight8 = 1;
 403                 return 0;
 404         }
 405         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
 406                 addr = hwif->io_ports[i];
 407                 if (!hwif_request_region(hwif, addr, 1)) {
 408                         while (--i)
 409                                 release_region(addr, 1);
 410                         goto data_region_busy;
 411                 }
 412         }
 413         return 0;
 414
 415 data_region_busy:
 416         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
 417         if (addr)
 418                 release_region(addr, 1);
 419 control_region_busy:
 420         /* If any errors are return, we drop the hwif interface. */
 421         return -EBUSY;
 422 }
 423
 424 /**
 425  *      ide_hwif_release_regions - free IDE resources
 426  *
 427  *      Note that we only release the standard ports,
 428  *      and do not even try to handle any extra ports
 429  *      allocated for weird IDE interface chipsets.
 430  *
 431  *      Note also that we don't yet handle mmio resources here. More
 432  *      importantly our caller should be doing this so we need to
 433  *      restructure this as a helper function for drivers.
 434  */
 435
 436 void ide_hwif_release_regions(ide_hwif_t *hwif)
 437 {
 438         u32 i = 0;
 439
 440         if (hwif->mmio)
 441                 return;
 442         if (hwif->io_ports[IDE_CONTROL_OFFSET])
 443                 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
 444         if (hwif->straight8) {
 445                 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
 446                 return;
 447         }
 448         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
 449                 if (hwif->io_ports[i])
 450                         release_region(hwif->io_ports[i], 1);
 451 }
 452
 453 /**
 454  *      ide_hwif_restore        -       restore hwif to template
 455  *      @hwif: hwif to update
 456  *      @tmp_hwif: template
 457  *
 458  *      Restore hwif to a previous state by copying most settings
 459  *      from the template.
 460  */
 461
 462 static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
 463 {
 464         hwif->hwgroup                   = tmp_hwif->hwgroup;
 465
 466         hwif->gendev.parent             = tmp_hwif->gendev.parent;
 467
 468         hwif->proc                      = tmp_hwif->proc;
 469
 470         hwif->major                     = tmp_hwif->major;
 471         hwif->straight8                 = tmp_hwif->straight8;
 472         hwif->bus_state                 = tmp_hwif->bus_state;
 473
 474         hwif->atapi_dma                 = tmp_hwif->atapi_dma;
 475         hwif->ultra_mask                = tmp_hwif->ultra_mask;
 476         hwif->mwdma_mask                = tmp_hwif->mwdma_mask;
 477         hwif->swdma_mask                = tmp_hwif->swdma_mask;
 478
 479         hwif->chipset                   = tmp_hwif->chipset;
 480         hwif->hold                      = tmp_hwif->hold;
 481
 482 #ifdef CONFIG_BLK_DEV_IDEPCI
 483         hwif->pci_dev                   = tmp_hwif->pci_dev;
 484         hwif->cds                       = tmp_hwif->cds;
 485 #endif
 486
 487         hwif->tuneproc                  = tmp_hwif->tuneproc;
 488         hwif->speedproc                 = tmp_hwif->speedproc;
 489         hwif->selectproc                = tmp_hwif->selectproc;
 490         hwif->reset_poll                = tmp_hwif->reset_poll;
 491         hwif->pre_reset                 = tmp_hwif->pre_reset;
 492         hwif->resetproc                 = tmp_hwif->resetproc;
 493         hwif->intrproc                  = tmp_hwif->intrproc;
 494         hwif->maskproc                  = tmp_hwif->maskproc;
 495         hwif->quirkproc                 = tmp_hwif->quirkproc;
 496         hwif->busproc                   = tmp_hwif->busproc;
 497
 498         hwif->ata_input_data            = tmp_hwif->ata_input_data;
 499         hwif->ata_output_data           = tmp_hwif->ata_output_data;
 500         hwif->atapi_input_bytes         = tmp_hwif->atapi_input_bytes;
 501         hwif->atapi_output_bytes        = tmp_hwif->atapi_output_bytes;
 502
 503         hwif->dma_setup                 = tmp_hwif->dma_setup;
 504         hwif->dma_exec_cmd              = tmp_hwif->dma_exec_cmd;
 505         hwif->dma_start                 = tmp_hwif->dma_start;
 506         hwif->ide_dma_end               = tmp_hwif->ide_dma_end;
 507         hwif->ide_dma_check             = tmp_hwif->ide_dma_check;
 508         hwif->ide_dma_on                = tmp_hwif->ide_dma_on;
 509         hwif->ide_dma_off_quietly       = tmp_hwif->ide_dma_off_quietly;
 510         hwif->ide_dma_test_irq          = tmp_hwif->ide_dma_test_irq;
 511         hwif->ide_dma_clear_irq         = tmp_hwif->ide_dma_clear_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->OUTSW                     = tmp_hwif->OUTSW;
 521         hwif->OUTSL                     = tmp_hwif->OUTSL;
 522
 523         hwif->INB                       = tmp_hwif->INB;
 524         hwif->INW                       = tmp_hwif->INW;
 525         hwif->INSW                      = tmp_hwif->INSW;
 526         hwif->INSL                      = tmp_hwif->INSL;
 527
 528         hwif->sg_max_nents              = tmp_hwif->sg_max_nents;
 529
 530         hwif->mmio                      = tmp_hwif->mmio;
 531         hwif->rqsize                    = tmp_hwif->rqsize;
 532         hwif->no_lba48                  = tmp_hwif->no_lba48;
 533
 534 #ifndef CONFIG_BLK_DEV_IDECS
 535         hwif->irq                       = tmp_hwif->irq;
 536 #endif
 537
 538         hwif->dma_base                  = tmp_hwif->dma_base;
 539         hwif->dma_master                = tmp_hwif->dma_master;
 540         hwif->dma_command               = tmp_hwif->dma_command;
 541         hwif->dma_vendor1               = tmp_hwif->dma_vendor1;
 542         hwif->dma_status                = tmp_hwif->dma_status;
 543         hwif->dma_vendor3               = tmp_hwif->dma_vendor3;
 544         hwif->dma_prdtable              = tmp_hwif->dma_prdtable;
 545
 546         hwif->config_data               = tmp_hwif->config_data;
 547         hwif->select_data               = tmp_hwif->select_data;
 548         hwif->extra_base                = tmp_hwif->extra_base;
 549         hwif->extra_ports               = tmp_hwif->extra_ports;
 550         hwif->autodma                   = tmp_hwif->autodma;
 551         hwif->udma_four                 = tmp_hwif->udma_four;
 552
 553         hwif->hwif_data                 = tmp_hwif->hwif_data;
 554 }
 555
 556 /**
 557  *      ide_unregister          -       free an IDE interface
 558  *      @index: index of interface (will change soon to a pointer)
 559  *
 560  *      Perform the final unregister of an IDE interface. At the moment
 561  *      we don't refcount interfaces so this will also get split up.
 562  *
 563  *      Locking:
 564  *      The caller must not hold the IDE locks
 565  *      The drive present/vanishing is not yet properly locked
 566  *      Take care with the callbacks. These have been split to avoid
 567  *      deadlocking the IDE layer. The shutdown callback is called
 568  *      before we take the lock and free resources. It is up to the
 569  *      caller to be sure there is no pending I/O here, and that
 570  *      the interface will not be reopened (present/vanishing locking
 571  *      isn't yet done BTW). After we commit to the final kill we
 572  *      call the cleanup callback with the ide locks held.
 573  *
 574  *      Unregister restores the hwif structures to the default state.
 575  *      This is raving bonkers.
 576  */
 577
 578 void ide_unregister(unsigned int index)
 579 {
 580         ide_drive_t *drive;
 581         ide_hwif_t *hwif, *g;
 582         static ide_hwif_t tmp_hwif; /* protected by ide_cfg_sem */
 583         ide_hwgroup_t *hwgroup;
 584         int irq_count = 0, unit;
 585
 586         BUG_ON(index >= MAX_HWIFS);
 587
 588         BUG_ON(in_interrupt());
 589         BUG_ON(irqs_disabled());
 590         down(&ide_cfg_sem);
 591         spin_lock_irq(&ide_lock);
 592         hwif = &ide_hwifs[index];
 593         if (!hwif->present)
 594                 goto abort;
 595         for (unit = 0; unit < MAX_DRIVES; ++unit) {
 596                 drive = &hwif->drives[unit];
 597                 if (!drive->present)
 598                         continue;
 599                 spin_unlock_irq(&ide_lock);
 600                 device_unregister(&drive->gendev);
 601                 wait_for_completion(&drive->gendev_rel_comp);
 602                 spin_lock_irq(&ide_lock);
 603         }
 604         hwif->present = 0;
 605
 606         spin_unlock_irq(&ide_lock);
 607
 608         destroy_proc_ide_interface(hwif);
 609
 610         hwgroup = hwif->hwgroup;
 611         /*
 612          * free the irq if we were the only hwif using it
 613          */
 614         g = hwgroup->hwif;
 615         do {
 616                 if (g->irq == hwif->irq)
 617                         ++irq_count;
 618                 g = g->next;
 619         } while (g != hwgroup->hwif);
 620         if (irq_count == 1)
 621                 free_irq(hwif->irq, hwgroup);
 622
 623         spin_lock_irq(&ide_lock);
 624         /*
 625          * Note that we only release the standard ports,
 626          * and do not even try to handle any extra ports
 627          * allocated for weird IDE interface chipsets.
 628          */
 629         ide_hwif_release_regions(hwif);
 630
 631         /*
 632          * Remove us from the hwgroup, and free
 633          * the hwgroup if we were the only member
 634          */
 635         if (hwif->next == hwif) {
 636                 BUG_ON(hwgroup->hwif != hwif);
 637                 kfree(hwgroup);
 638         } else {
 639                 /* There is another interface in hwgroup.
 640                  * Unlink us, and set hwgroup->drive and ->hwif to
 641                  * something sane.
 642                  */
 643                 g = hwgroup->hwif;
 644                 while (g->next != hwif)
 645                         g = g->next;
 646                 g->next = hwif->next;
 647                 if (hwgroup->hwif == hwif) {
 648                         /* Chose a random hwif for hwgroup->hwif.
 649                          * It's guaranteed that there are no drives
 650                          * left in the hwgroup.
 651                          */
 652                         BUG_ON(hwgroup->drive != NULL);
 653                         hwgroup->hwif = g;
 654                 }
 655                 BUG_ON(hwgroup->hwif == hwif);
 656         }
 657
 658         /* More messed up locking ... */
 659         spin_unlock_irq(&ide_lock);
 660         device_unregister(&hwif->gendev);
 661         wait_for_completion(&hwif->gendev_rel_comp);
 662
 663         /*
 664          * Remove us from the kernel's knowledge
 665          */
 666         blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
 667         kfree(hwif->sg_table);
 668         unregister_blkdev(hwif->major, hwif->name);
 669         spin_lock_irq(&ide_lock);
 670
 671         if (hwif->dma_base) {
 672                 (void) ide_release_dma(hwif);
 673
 674                 hwif->dma_base = 0;
 675                 hwif->dma_master = 0;
 676                 hwif->dma_command = 0;
 677                 hwif->dma_vendor1 = 0;
 678                 hwif->dma_status = 0;
 679                 hwif->dma_vendor3 = 0;
 680                 hwif->dma_prdtable = 0;
 681
 682                 hwif->extra_base  = 0;
 683                 hwif->extra_ports = 0;
 684         }
 685
 686         /* copy original settings */
 687         tmp_hwif = *hwif;
 688
 689         /* restore hwif data to pristine status */
 690         init_hwif_data(hwif, index);
 691         init_hwif_default(hwif, index);
 692
 693         ide_hwif_restore(hwif, &tmp_hwif);
 694
 695 abort:
 696         spin_unlock_irq(&ide_lock);
 697         up(&ide_cfg_sem);
 698 }
 699
 700 EXPORT_SYMBOL(ide_unregister);
 701
 702
 703 /**
 704  *      ide_setup_ports         -       set up IDE interface ports
 705  *      @hw: register descriptions
 706  *      @base: base register
 707  *      @offsets: table of register offsets
 708  *      @ctrl: control register
 709  *      @ack_irq: IRQ ack
 710  *      @irq: interrupt lie
 711  *
 712  *      Setup hw_regs_t structure described by parameters.  You
 713  *      may set up the hw structure yourself OR use this routine to
 714  *      do it for you. This is basically a helper
 715  *
 716  */
 717
 718 void ide_setup_ports (  hw_regs_t *hw,
 719                         unsigned long base, int *offsets,
 720                         unsigned long ctrl, unsigned long intr,
 721                         ide_ack_intr_t *ack_intr,
 722 /*
 723  *                      ide_io_ops_t *iops,
 724  */
 725                         int irq)
 726 {
 727         int i;
 728
 729         memset(hw, 0, sizeof(hw_regs_t));
 730         for (i = 0; i < IDE_NR_PORTS; i++) {
 731                 if (offsets[i] == -1) {
 732                         switch(i) {
 733                                 case IDE_CONTROL_OFFSET:
 734                                         hw->io_ports[i] = ctrl;
 735                                         break;
 736 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
 737                                 case IDE_IRQ_OFFSET:
 738                                         hw->io_ports[i] = intr;
 739                                         break;
 740 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
 741                                 default:
 742                                         hw->io_ports[i] = 0;
 743                                         break;
 744                         }
 745                 } else {
 746                         hw->io_ports[i] = base + offsets[i];
 747                 }
 748         }
 749         hw->irq = irq;
 750         hw->dma = NO_DMA;
 751         hw->ack_intr = ack_intr;
 752 /*
 753  *      hw->iops = iops;
 754  */
 755 }
 756
 757 /**
 758  *      ide_register_hw_with_fixup      -       register IDE interface
 759  *      @hw: hardware registers
 760  *      @hwifp: pointer to returned hwif
 761  *      @fixup: fixup function
 762  *
 763  *      Register an IDE interface, specifying exactly the registers etc.
 764  *      Set init=1 iff calling before probes have taken place.
 765  *
 766  *      Returns -1 on error.
 767  */
 768
 769 int ide_register_hw_with_fixup(hw_regs_t *hw, ide_hwif_t **hwifp, void(*fixup)(ide_hwif_t *hwif))
 770 {
 771         int index, retry = 1;
 772         ide_hwif_t *hwif;
 773
 774         do {
 775                 for (index = 0; index < MAX_HWIFS; ++index) {
 776                         hwif = &ide_hwifs[index];
 777                         if (hwif->hw.io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
 778                                 goto found;
 779                 }
 780                 for (index = 0; index < MAX_HWIFS; ++index) {
 781                         hwif = &ide_hwifs[index];
 782                         if (hwif->hold)
 783                                 continue;
 784                         if ((!hwif->present && !hwif->mate && !initializing) ||
 785                             (!hwif->hw.io_ports[IDE_DATA_OFFSET] && initializing))
 786                                 goto found;
 787                 }
 788                 for (index = 0; index < MAX_HWIFS; index++)
 789                         ide_unregister(index);
 790         } while (retry--);
 791         return -1;
 792 found:
 793         if (hwif->present)
 794                 ide_unregister(index);
 795         else if (!hwif->hold) {
 796                 init_hwif_data(hwif, index);
 797                 init_hwif_default(hwif, index);
 798         }
 799         if (hwif->present)
 800                 return -1;
 801         memcpy(&hwif->hw, hw, sizeof(*hw));
 802         memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports));
 803         hwif->irq = hw->irq;
 804         hwif->noprobe = 0;
 805         hwif->chipset = hw->chipset;
 806         hwif->gendev.parent = hw->dev;
 807
 808         if (!initializing) {
 809                 probe_hwif_init_with_fixup(hwif, fixup);
 810                 create_proc_ide_interfaces();
 811         }
 812
 813         if (hwifp)
 814                 *hwifp = hwif;
 815
 816         return (initializing || hwif->present) ? index : -1;
 817 }
 818
 819 EXPORT_SYMBOL(ide_register_hw_with_fixup);
 820
 821 int ide_register_hw(hw_regs_t *hw, ide_hwif_t **hwifp)
 822 {
 823         return ide_register_hw_with_fixup(hw, hwifp, NULL);
 824 }
 825
 826 EXPORT_SYMBOL(ide_register_hw);
 827
 828 /*
 829  *      Locks for IDE setting functionality
 830  */
 831
 832 DECLARE_MUTEX(ide_setting_sem);
 833
 834 /**
 835  *      __ide_add_setting       -       add an ide setting option
 836  *      @drive: drive to use
 837  *      @name: setting name
 838  *      @rw: true if the function is read write
 839  *      @read_ioctl: function to call on read
 840  *      @write_ioctl: function to call on write
 841  *      @data_type: type of data
 842  *      @min: range minimum
 843  *      @max: range maximum
 844  *      @mul_factor: multiplication scale
 845  *      @div_factor: divison scale
 846  *      @data: private data field
 847  *      @set: setting
 848  *      @auto_remove: setting auto removal flag
 849  *
 850  *      Removes the setting named from the device if it is present.
 851  *      The function takes the settings_lock to protect against
 852  *      parallel changes. This function must not be called from IRQ
 853  *      context. Returns 0 on success or -1 on failure.
 854  *
 855  *      BUGS: This code is seriously over-engineered. There is also
 856  *      magic about how the driver specific features are setup. If
 857  *      a driver is attached we assume the driver settings are auto
 858  *      remove.
 859  */
 860
 861 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)
 862 {
 863         ide_settings_t **p = (ide_settings_t **) &drive->settings, *setting = NULL;
 864
 865         down(&ide_setting_sem);
 866         while ((*p) && strcmp((*p)->name, name) < 0)
 867                 p = &((*p)->next);
 868         if ((setting = kzalloc(sizeof(*setting), GFP_KERNEL)) == NULL)
 869                 goto abort;
 870         if ((setting->name = kmalloc(strlen(name) + 1, GFP_KERNEL)) == NULL)
 871                 goto abort;
 872         strcpy(setting->name, name);
 873         setting->rw = rw;
 874         setting->read_ioctl = read_ioctl;
 875         setting->write_ioctl = write_ioctl;
 876         setting->data_type = data_type;
 877         setting->min = min;
 878         setting->max = max;
 879         setting->mul_factor = mul_factor;
 880         setting->div_factor = div_factor;
 881         setting->data = data;
 882         setting->set = set;
 883
 884         setting->next = *p;
 885         if (auto_remove)
 886                 setting->auto_remove = 1;
 887         *p = setting;
 888         up(&ide_setting_sem);
 889         return 0;
 890 abort:
 891         up(&ide_setting_sem);
 892         kfree(setting);
 893         return -1;
 894 }
 895
 896 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)
 897 {
 898         return __ide_add_setting(drive, name, rw, read_ioctl, write_ioctl, data_type, min, max, mul_factor, div_factor, data, set, 1);
 899 }
 900
 901 EXPORT_SYMBOL(ide_add_setting);
 902
 903 /**
 904  *      __ide_remove_setting    -       remove an ide setting option
 905  *      @drive: drive to use
 906  *      @name: setting name
 907  *
 908  *      Removes the setting named from the device if it is present.
 909  *      The caller must hold the setting semaphore.
 910  */
 911
 912 static void __ide_remove_setting (ide_drive_t *drive, char *name)
 913 {
 914         ide_settings_t **p, *setting;
 915
 916         p = (ide_settings_t **) &drive->settings;
 917
 918         while ((*p) && strcmp((*p)->name, name))
 919                 p = &((*p)->next);
 920         if ((setting = (*p)) == NULL)
 921                 return;
 922
 923         (*p) = setting->next;
 924
 925         kfree(setting->name);
 926         kfree(setting);
 927 }
 928
 929 /**
 930  *      ide_find_setting_by_ioctl       -       find a drive specific ioctl
 931  *      @drive: drive to scan
 932  *      @cmd: ioctl command to handle
 933  *
 934  *      Scan's the device setting table for a matching entry and returns
 935  *      this or NULL if no entry is found. The caller must hold the
 936  *      setting semaphore
 937  */
 938
 939 static ide_settings_t *ide_find_setting_by_ioctl (ide_drive_t *drive, int cmd)
 940 {
 941         ide_settings_t *setting = drive->settings;
 942
 943         while (setting) {
 944                 if (setting->read_ioctl == cmd || setting->write_ioctl == cmd)
 945                         break;
 946                 setting = setting->next;
 947         }
 948
 949         return setting;
 950 }
 951
 952 /**
 953  *      ide_find_setting_by_name        -       find a drive specific setting
 954  *      @drive: drive to scan
 955  *      @name: setting name
 956  *
 957  *      Scan's the device setting table for a matching entry and returns
 958  *      this or NULL if no entry is found. The caller must hold the
 959  *      setting semaphore
 960  */
 961
 962 ide_settings_t *ide_find_setting_by_name (ide_drive_t *drive, char *name)
 963 {
 964         ide_settings_t *setting = drive->settings;
 965
 966         while (setting) {
 967                 if (strcmp(setting->name, name) == 0)
 968                         break;
 969                 setting = setting->next;
 970         }
 971         return setting;
 972 }
 973
 974 /**
 975  *      auto_remove_settings    -       remove driver specific settings
 976  *      @drive: drive
 977  *
 978  *      Automatically remove all the driver specific settings for this
 979  *      drive. This function may not be called from IRQ context. The
 980  *      caller must hold ide_setting_sem.
 981  */
 982
 983 static void auto_remove_settings (ide_drive_t *drive)
 984 {
 985         ide_settings_t *setting;
 986 repeat:
 987         setting = drive->settings;
 988         while (setting) {
 989                 if (setting->auto_remove) {
 990                         __ide_remove_setting(drive, setting->name);
 991                         goto repeat;
 992                 }
 993                 setting = setting->next;
 994         }
 995 }
 996
 997 /**
 998  *      ide_read_setting        -       read an IDE setting
 999  *      @drive: drive to read from
1000  *      @setting: drive setting
1001  *
1002  *      Read a drive setting and return the value. The caller
1003  *      must hold the ide_setting_sem when making this call.
1004  *
1005  *      BUGS: the data return and error are the same return value
1006  *      so an error -EINVAL and true return of the same value cannot
1007  *      be told apart
1008  */
1009
1010 int ide_read_setting (ide_drive_t *drive, ide_settings_t *setting)
1011 {
1012         int             val = -EINVAL;
1013         unsigned long   flags;
1014
1015         if ((setting->rw & SETTING_READ)) {
1016                 spin_lock_irqsave(&ide_lock, flags);
1017                 switch(setting->data_type) {
1018                         case TYPE_BYTE:
1019                                 val = *((u8 *) setting->data);
1020                                 break;
1021                         case TYPE_SHORT:
1022                                 val = *((u16 *) setting->data);
1023                                 break;
1024                         case TYPE_INT:
1025                         case TYPE_INTA:
1026                                 val = *((u32 *) setting->data);
1027                                 break;
1028                 }
1029                 spin_unlock_irqrestore(&ide_lock, flags);
1030         }
1031         return val;
1032 }
1033
1034 /**
1035  *      ide_spin_wait_hwgroup   -       wait for group
1036  *      @drive: drive in the group
1037  *
1038  *      Wait for an IDE device group to go non busy and then return
1039  *      holding the ide_lock which guards the hwgroup->busy status
1040  *      and right to use it.
1041  */
1042
1043 int ide_spin_wait_hwgroup (ide_drive_t *drive)
1044 {
1045         ide_hwgroup_t *hwgroup = HWGROUP(drive);
1046         unsigned long timeout = jiffies + (3 * HZ);
1047
1048         spin_lock_irq(&ide_lock);
1049
1050         while (hwgroup->busy) {
1051                 unsigned long lflags;
1052                 spin_unlock_irq(&ide_lock);
1053                 local_irq_set(lflags);
1054                 if (time_after(jiffies, timeout)) {
1055                         local_irq_restore(lflags);
1056                         printk(KERN_ERR "%s: channel busy\n", drive->name);
1057                         return -EBUSY;
1058                 }
1059                 local_irq_restore(lflags);
1060                 spin_lock_irq(&ide_lock);
1061         }
1062         return 0;
1063 }
1064
1065 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
1066
1067 /**
1068  *      ide_write_setting       -       read an IDE setting
1069  *      @drive: drive to read from
1070  *      @setting: drive setting
1071  *      @val: value
1072  *
1073  *      Write a drive setting if it is possible. The caller
1074  *      must hold the ide_setting_sem when making this call.
1075  *
1076  *      BUGS: the data return and error are the same return value
1077  *      so an error -EINVAL and true return of the same value cannot
1078  *      be told apart
1079  *
1080  *      FIXME:  This should be changed to enqueue a special request
1081  *      to the driver to change settings, and then wait on a sema for completion.
1082  *      The current scheme of polling is kludgy, though safe enough.
1083  */
1084
1085 int ide_write_setting (ide_drive_t *drive, ide_settings_t *setting, int val)
1086 {
1087         int i;
1088         u32 *p;
1089
1090         if (!capable(CAP_SYS_ADMIN))
1091                 return -EACCES;
1092         if (!(setting->rw & SETTING_WRITE))
1093                 return -EPERM;
1094         if (val < setting->min || val > setting->max)
1095                 return -EINVAL;
1096         if (setting->set)
1097                 return setting->set(drive, val);
1098         if (ide_spin_wait_hwgroup(drive))
1099                 return -EBUSY;
1100         switch (setting->data_type) {
1101                 case TYPE_BYTE:
1102                         *((u8 *) setting->data) = val;
1103                         break;
1104                 case TYPE_SHORT:
1105                         *((u16 *) setting->data) = val;
1106                         break;
1107                 case TYPE_INT:
1108                         *((u32 *) setting->data) = val;
1109                         break;
1110                 case TYPE_INTA:
1111                         p = (u32 *) setting->data;
1112                         for (i = 0; i < 1 << PARTN_BITS; i++, p++)
1113                                 *p = val;
1114                         break;
1115         }
1116         spin_unlock_irq(&ide_lock);
1117         return 0;
1118 }
1119
1120 static int set_io_32bit(ide_drive_t *drive, int arg)
1121 {
1122         drive->io_32bit = arg;
1123 #ifdef CONFIG_BLK_DEV_DTC2278
1124         if (HWIF(drive)->chipset == ide_dtc2278)
1125                 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
1126 #endif /* CONFIG_BLK_DEV_DTC2278 */
1127         return 0;
1128 }
1129
1130 static int set_using_dma (ide_drive_t *drive, int arg)
1131 {
1132 #ifdef CONFIG_BLK_DEV_IDEDMA
1133         if (!drive->id || !(drive->id->capability & 1))
1134                 return -EPERM;
1135         if (HWIF(drive)->ide_dma_check == NULL)
1136                 return -EPERM;
1137         if (arg) {
1138                 if (HWIF(drive)->ide_dma_check(drive)) return -EIO;
1139                 if (HWIF(drive)->ide_dma_on(drive)) return -EIO;
1140         } else {
1141                 if (__ide_dma_off(drive))
1142                         return -EIO;
1143         }
1144         return 0;
1145 #else
1146         return -EPERM;
1147 #endif
1148 }
1149
1150 static int set_pio_mode (ide_drive_t *drive, int arg)
1151 {
1152         struct request rq;
1153
1154         if (!HWIF(drive)->tuneproc)
1155                 return -ENOSYS;
1156         if (drive->special.b.set_tune)
1157                 return -EBUSY;
1158         ide_init_drive_cmd(&rq);
1159         drive->tune_req = (u8) arg;
1160         drive->special.b.set_tune = 1;
1161         (void) ide_do_drive_cmd(drive, &rq, ide_wait);
1162         return 0;
1163 }
1164
1165 static int set_xfer_rate (ide_drive_t *drive, int arg)
1166 {
1167         int err = ide_wait_cmd(drive,
1168                         WIN_SETFEATURES, (u8) arg,
1169                         SETFEATURES_XFER, 0, NULL);
1170
1171         if (!err && arg) {
1172                 ide_set_xfer_rate(drive, (u8) arg);
1173                 ide_driveid_update(drive);
1174         }
1175         return err;
1176 }
1177
1178 /**
1179  *      ide_add_generic_settings        -       generic ide settings
1180  *      @drive: drive being configured
1181  *
1182  *      Add the generic parts of the system settings to the /proc files and
1183  *      ioctls for this IDE device. The caller must not be holding the
1184  *      ide_setting_sem.
1185  */
1186
1187 void ide_add_generic_settings (ide_drive_t *drive)
1188 {
1189 /*
1190  *                        drive         setting name            read/write access                               read ioctl              write ioctl             data type       min     max                             mul_factor      div_factor      data pointer                    set function
1191  */
1192         __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);
1193         __ide_add_setting(drive,        "keepsettings",         SETTING_RW,                                     HDIO_GET_KEEPSETTINGS,  HDIO_SET_KEEPSETTINGS,  TYPE_BYTE,      0,      1,                              1,              1,              &drive->keep_settings,          NULL,           0);
1194         __ide_add_setting(drive,        "nice1",                SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->nice1,                  NULL,           0);
1195         __ide_add_setting(drive,        "pio_mode",             SETTING_WRITE,                                  -1,                     HDIO_SET_PIO_MODE,      TYPE_BYTE,      0,      255,                            1,              1,              NULL,                           set_pio_mode,   0);
1196         __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);
1197         __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);
1198         __ide_add_setting(drive,        "init_speed",           SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->init_speed,             NULL,           0);
1199         __ide_add_setting(drive,        "current_speed",        SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->current_speed,          set_xfer_rate,  0);
1200         __ide_add_setting(drive,        "number",               SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      3,                              1,              1,              &drive->dn,                     NULL,           0);
1201 }
1202
1203 /**
1204  *      system_bus_clock        -       clock guess
1205  *
1206  *      External version of the bus clock guess used by very old IDE drivers
1207  *      for things like VLB timings. Should not be used.
1208  */
1209
1210 int system_bus_clock (void)
1211 {
1212         return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
1213 }
1214
1215 EXPORT_SYMBOL(system_bus_clock);
1216
1217 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
1218 {
1219         ide_drive_t *drive = dev->driver_data;
1220         ide_hwif_t *hwif = HWIF(drive);
1221         struct request rq;
1222         struct request_pm_state rqpm;
1223         ide_task_t args;
1224
1225         /* Call ACPI _GTM only once */
1226         if (!(drive->dn % 2))
1227                 ide_acpi_get_timing(hwif);
1228
1229         memset(&rq, 0, sizeof(rq));
1230         memset(&rqpm, 0, sizeof(rqpm));
1231         memset(&args, 0, sizeof(args));
1232         rq.cmd_type = REQ_TYPE_PM_SUSPEND;
1233         rq.special = &args;
1234         rq.data = &rqpm;
1235         rqpm.pm_step = ide_pm_state_start_suspend;
1236         if (mesg.event == PM_EVENT_PRETHAW)
1237                 mesg.event = PM_EVENT_FREEZE;
1238         rqpm.pm_state = mesg.event;
1239
1240         return ide_do_drive_cmd(drive, &rq, ide_wait);
1241 }
1242
1243 static int generic_ide_resume(struct device *dev)
1244 {
1245         ide_drive_t *drive = dev->driver_data;
1246         ide_hwif_t *hwif = HWIF(drive);
1247         struct request rq;
1248         struct request_pm_state rqpm;
1249         ide_task_t args;
1250
1251         /* Call ACPI _STM only once */
1252         if (!(drive->dn % 2))
1253                 ide_acpi_push_timing(hwif);
1254
1255         ide_acpi_exec_tfs(drive);
1256
1257         memset(&rq, 0, sizeof(rq));
1258         memset(&rqpm, 0, sizeof(rqpm));
1259         memset(&args, 0, sizeof(args));
1260         rq.cmd_type = REQ_TYPE_PM_RESUME;
1261         rq.special = &args;
1262         rq.data = &rqpm;
1263         rqpm.pm_step = ide_pm_state_start_resume;
1264         rqpm.pm_state = PM_EVENT_ON;
1265
1266         return ide_do_drive_cmd(drive, &rq, ide_head_wait);
1267 }
1268
1269 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
1270                         unsigned int cmd, unsigned long arg)
1271 {
1272         ide_settings_t *setting;
1273         ide_driver_t *drv;
1274         int err = 0;
1275         void __user *p = (void __user *)arg;
1276
1277         down(&ide_setting_sem);
1278         if ((setting = ide_find_setting_by_ioctl(drive, cmd)) != NULL) {
1279                 if (cmd == setting->read_ioctl) {
1280                         err = ide_read_setting(drive, setting);
1281                         up(&ide_setting_sem);
1282                         return err >= 0 ? put_user(err, (long __user *)arg) : err;
1283                 } else {
1284                         if (bdev != bdev->bd_contains)
1285                                 err = -EINVAL;
1286                         else
1287                                 err = ide_write_setting(drive, setting, arg);
1288                         up(&ide_setting_sem);
1289                         return err;
1290                 }
1291         }
1292         up(&ide_setting_sem);
1293
1294         switch (cmd) {
1295                 case HDIO_OBSOLETE_IDENTITY:
1296                 case HDIO_GET_IDENTITY:
1297                         if (bdev != bdev->bd_contains)
1298                                 return -EINVAL;
1299                         if (drive->id_read == 0)
1300                                 return -ENOMSG;
1301                         if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1302                                 return -EFAULT;
1303                         return 0;
1304
1305                 case HDIO_GET_NICE:
1306                         return put_user(drive->dsc_overlap      <<      IDE_NICE_DSC_OVERLAP    |
1307                                         drive->atapi_overlap    <<      IDE_NICE_ATAPI_OVERLAP  |
1308                                         drive->nice0            <<      IDE_NICE_0              |
1309                                         drive->nice1            <<      IDE_NICE_1              |
1310                                         drive->nice2            <<      IDE_NICE_2,
1311                                         (long __user *) arg);
1312
1313 #ifdef CONFIG_IDE_TASK_IOCTL
1314                 case HDIO_DRIVE_TASKFILE:
1315                         if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1316                                 return -EACCES;
1317                         switch(drive->media) {
1318                                 case ide_disk:
1319                                         return ide_taskfile_ioctl(drive, cmd, arg);
1320                                 default:
1321                                         return -ENOMSG;
1322                         }
1323 #endif /* CONFIG_IDE_TASK_IOCTL */
1324
1325                 case HDIO_DRIVE_CMD:
1326                         if (!capable(CAP_SYS_RAWIO))
1327                                 return -EACCES;
1328                         return ide_cmd_ioctl(drive, cmd, arg);
1329
1330                 case HDIO_DRIVE_TASK:
1331                         if (!capable(CAP_SYS_RAWIO))
1332                                 return -EACCES;
1333                         return ide_task_ioctl(drive, cmd, arg);
1334
1335                 case HDIO_SCAN_HWIF:
1336                 {
1337                         hw_regs_t hw;
1338                         int args[3];
1339                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1340                         if (copy_from_user(args, p, 3 * sizeof(int)))
1341                                 return -EFAULT;
1342                         memset(&hw, 0, sizeof(hw));
1343                         ide_init_hwif_ports(&hw, (unsigned long) args[0],
1344                                             (unsigned long) args[1], NULL);
1345                         hw.irq = args[2];
1346                         if (ide_register_hw(&hw, NULL) == -1)
1347                                 return -EIO;
1348                         return 0;
1349                 }
1350                 case HDIO_UNREGISTER_HWIF:
1351                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1352                         /* (arg > MAX_HWIFS) checked in function */
1353                         ide_unregister(arg);
1354                         return 0;
1355                 case HDIO_SET_NICE:
1356                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1357                         if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1358                                 return -EPERM;
1359                         drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1360                         drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1361                         if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1362                                 drive->dsc_overlap = 0;
1363                                 return -EPERM;
1364                         }
1365                         drive->nice1 = (arg >> IDE_NICE_1) & 1;
1366                         return 0;
1367                 case HDIO_DRIVE_RESET:
1368                 {
1369                         unsigned long flags;
1370                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1371
1372                         /*
1373                          *      Abort the current command on the
1374                          *      group if there is one, taking
1375                          *      care not to allow anything else
1376                          *      to be queued and to die on the
1377                          *      spot if we miss one somehow
1378                          */
1379
1380                         spin_lock_irqsave(&ide_lock, flags);
1381
1382                         if (HWGROUP(drive)->resetting) {
1383                                 spin_unlock_irqrestore(&ide_lock, flags);
1384                                 return -EBUSY;
1385                         }
1386
1387                         ide_abort(drive, "drive reset");
1388
1389                         BUG_ON(HWGROUP(drive)->handler);
1390
1391                         /* Ensure nothing gets queued after we
1392                            drop the lock. Reset will clear the busy */
1393
1394                         HWGROUP(drive)->busy = 1;
1395                         spin_unlock_irqrestore(&ide_lock, flags);
1396                         (void) ide_do_reset(drive);
1397
1398                         return 0;
1399                 }
1400
1401                 case CDROMEJECT:
1402                 case CDROMCLOSETRAY:
1403                         return scsi_cmd_ioctl(file, bdev->bd_disk, cmd, p);
1404
1405                 case HDIO_GET_BUSSTATE:
1406                         if (!capable(CAP_SYS_ADMIN))
1407                                 return -EACCES;
1408                         if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1409                                 return -EFAULT;
1410                         return 0;
1411
1412                 case HDIO_SET_BUSSTATE:
1413                         if (!capable(CAP_SYS_ADMIN))
1414                                 return -EACCES;
1415                         if (HWIF(drive)->busproc)
1416                                 return HWIF(drive)->busproc(drive, (int)arg);
1417                         return -EOPNOTSUPP;
1418                 default:
1419                         return -EINVAL;
1420         }
1421 }
1422
1423 EXPORT_SYMBOL(generic_ide_ioctl);
1424
1425 /*
1426  * stridx() returns the offset of c within s,
1427  * or -1 if c is '\0' or not found within s.
1428  */
1429 static int __init stridx (const char *s, char c)
1430 {
1431         char *i = strchr(s, c);
1432         return (i && c) ? i - s : -1;
1433 }
1434
1435 /*
1436  * match_parm() does parsing for ide_setup():
1437  *
1438  * 1. the first char of s must be '='.
1439  * 2. if the remainder matches one of the supplied keywords,
1440  *     the index (1 based) of the keyword is negated and returned.
1441  * 3. if the remainder is a series of no more than max_vals numbers
1442  *     separated by commas, the numbers are saved in vals[] and a
1443  *     count of how many were saved is returned.  Base10 is assumed,
1444  *     and base16 is allowed when prefixed with "0x".
1445  * 4. otherwise, zero is returned.
1446  */
1447 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1448 {
1449         static const char *decimal = "0123456789";
1450         static const char *hex = "0123456789abcdef";
1451         int i, n;
1452
1453         if (*s++ == '=') {
1454                 /*
1455                  * Try matching against the supplied keywords,
1456                  * and return -(index+1) if we match one
1457                  */
1458                 if (keywords != NULL) {
1459                         for (i = 0; *keywords != NULL; ++i) {
1460                                 if (!strcmp(s, *keywords++))
1461                                         return -(i+1);
1462                         }
1463                 }
1464                 /*
1465                  * Look for a series of no more than "max_vals"
1466                  * numeric values separated by commas, in base10,
1467                  * or base16 when prefixed with "0x".
1468                  * Return a count of how many were found.
1469                  */
1470                 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1471                         vals[n] = i;
1472                         while ((i = stridx(decimal, *++s)) >= 0)
1473                                 vals[n] = (vals[n] * 10) + i;
1474                         if (*s == 'x' && !vals[n]) {
1475                                 while ((i = stridx(hex, *++s)) >= 0)
1476                                         vals[n] = (vals[n] * 0x10) + i;
1477                         }
1478                         if (++n == max_vals)
1479                                 break;
1480                         if (*s == ',' || *s == ';')
1481                                 ++s;
1482                 }
1483                 if (!*s)
1484                         return n;
1485         }
1486         return 0;       /* zero = nothing matched */
1487 }
1488
1489 #ifdef CONFIG_BLK_DEV_ALI14XX
1490 static int __initdata probe_ali14xx;
1491 extern int ali14xx_init(void);
1492 #endif
1493 #ifdef CONFIG_BLK_DEV_UMC8672
1494 static int __initdata probe_umc8672;
1495 extern int umc8672_init(void);
1496 #endif
1497 #ifdef CONFIG_BLK_DEV_DTC2278
1498 static int __initdata probe_dtc2278;
1499 extern int dtc2278_init(void);
1500 #endif
1501 #ifdef CONFIG_BLK_DEV_HT6560B
1502 static int __initdata probe_ht6560b;
1503 extern int ht6560b_init(void);
1504 #endif
1505 #ifdef CONFIG_BLK_DEV_QD65XX
1506 static int __initdata probe_qd65xx;
1507 extern int qd65xx_init(void);
1508 #endif
1509
1510 static int __initdata is_chipset_set[MAX_HWIFS];
1511
1512 /*
1513  * ide_setup() gets called VERY EARLY during initialization,
1514  * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1515  *
1516  * Remember to update Documentation/ide.txt if you change something here.
1517  */
1518 static int __init ide_setup(char *s)
1519 {
1520         int i, vals[3];
1521         ide_hwif_t *hwif;
1522         ide_drive_t *drive;
1523         unsigned int hw, unit;
1524         const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1525         const char max_hwif  = '0' + (MAX_HWIFS - 1);
1526
1527
1528         if (strncmp(s,"hd",2) == 0 && s[2] == '=')      /* hd= is for hd.c   */
1529                 return 0;                               /* driver and not us */
1530
1531         if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1532                 return 0;
1533
1534         printk(KERN_INFO "ide_setup: %s", s);
1535         init_ide_data ();
1536
1537 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1538         if (!strcmp(s, "ide=doubler")) {
1539                 extern int ide_doubler;
1540
1541                 printk(" : Enabled support for IDE doublers\n");
1542                 ide_doubler = 1;
1543                 return 1;
1544         }
1545 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1546
1547         if (!strcmp(s, "ide=nodma")) {
1548                 printk(" : Prevented DMA\n");
1549                 noautodma = 1;
1550                 return 1;
1551         }
1552
1553 #ifdef CONFIG_BLK_DEV_IDEPCI
1554         if (!strcmp(s, "ide=reverse")) {
1555                 ide_scan_direction = 1;
1556                 printk(" : Enabled support for IDE inverse scan order.\n");
1557                 return 1;
1558         }
1559 #endif /* CONFIG_BLK_DEV_IDEPCI */
1560
1561 #ifdef CONFIG_BLK_DEV_IDEACPI
1562         if (!strcmp(s, "ide=noacpi")) {
1563                 //printk(" : Disable IDE ACPI support.\n");
1564                 ide_noacpi = 1;
1565                 return 1;
1566         }
1567         if (!strcmp(s, "ide=acpigtf")) {
1568                 //printk(" : Enable IDE ACPI _GTF support.\n");
1569                 ide_noacpitfs = 0;
1570                 return 1;
1571         }
1572         if (!strcmp(s, "ide=acpionboot")) {
1573                 //printk(" : Call IDE ACPI methods on boot.\n");
1574                 ide_noacpionboot = 0;
1575                 return 1;
1576         }
1577 #endif /* CONFIG_BLK_DEV_IDEACPI */
1578
1579         /*
1580          * Look for drive options:  "hdx="
1581          */
1582         if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1583                 const char *hd_words[] = {
1584                         "none", "noprobe", "nowerr", "cdrom", "serialize",
1585                         "autotune", "noautotune", "minus8", "swapdata", "bswap",
1586                         "noflush", "remap", "remap63", "scsi", NULL };
1587                 unit = s[2] - 'a';
1588                 hw   = unit / MAX_DRIVES;
1589                 unit = unit % MAX_DRIVES;
1590                 hwif = &ide_hwifs[hw];
1591                 drive = &hwif->drives[unit];
1592                 if (strncmp(s + 4, "ide-", 4) == 0) {
1593                         strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1594                         goto done;
1595                 }
1596                 switch (match_parm(&s[3], hd_words, vals, 3)) {
1597                         case -1: /* "none" */
1598                         case -2: /* "noprobe" */
1599                                 drive->noprobe = 1;
1600                                 goto done;
1601                         case -3: /* "nowerr" */
1602                                 drive->bad_wstat = BAD_R_STAT;
1603                                 hwif->noprobe = 0;
1604                                 goto done;
1605                         case -4: /* "cdrom" */
1606                                 drive->present = 1;
1607                                 drive->media = ide_cdrom;
1608                                 /* an ATAPI device ignores DRDY */
1609                                 drive->ready_stat = 0;
1610                                 hwif->noprobe = 0;
1611                                 goto done;
1612                         case -5: /* "serialize" */
1613                                 printk(" -- USE \"ide%d=serialize\" INSTEAD", hw);
1614                                 goto do_serialize;
1615                         case -6: /* "autotune" */
1616                                 drive->autotune = IDE_TUNE_AUTO;
1617                                 goto obsolete_option;
1618                         case -7: /* "noautotune" */
1619                                 drive->autotune = IDE_TUNE_NOAUTO;
1620                                 goto obsolete_option;
1621                         case -9: /* "swapdata" */
1622                         case -10: /* "bswap" */
1623                                 drive->bswap = 1;
1624                                 goto done;
1625                         case -11: /* noflush */
1626                                 drive->noflush = 1;
1627                                 goto done;
1628                         case -12: /* "remap" */
1629                                 drive->remap_0_to_1 = 1;
1630                                 goto done;
1631                         case -13: /* "remap63" */
1632                                 drive->sect0 = 63;
1633                                 goto done;
1634                         case -14: /* "scsi" */
1635                                 drive->scsi = 1;
1636                                 goto done;
1637                         case 3: /* cyl,head,sect */
1638                                 drive->media    = ide_disk;
1639                                 drive->ready_stat = READY_STAT;
1640                                 drive->cyl      = drive->bios_cyl  = vals[0];
1641                                 drive->head     = drive->bios_head = vals[1];
1642                                 drive->sect     = drive->bios_sect = vals[2];
1643                                 drive->present  = 1;
1644                                 drive->forced_geom = 1;
1645                                 hwif->noprobe = 0;
1646                                 goto done;
1647                         default:
1648                                 goto bad_option;
1649                 }
1650         }
1651
1652         if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1653                 goto bad_option;
1654         /*
1655          * Look for bus speed option:  "idebus="
1656          */
1657         if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1658                 if (match_parm(&s[6], NULL, vals, 1) != 1)
1659                         goto bad_option;
1660                 if (vals[0] >= 20 && vals[0] <= 66) {
1661                         idebus_parameter = vals[0];
1662                 } else
1663                         printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1664                 goto done;
1665         }
1666         /*
1667          * Look for interface options:  "idex="
1668          */
1669         if (s[3] >= '0' && s[3] <= max_hwif) {
1670                 /*
1671                  * Be VERY CAREFUL changing this: note hardcoded indexes below
1672                  * (-8, -9, -10) are reserved to ease the hardcoding.
1673                  */
1674                 static const char *ide_words[] = {
1675                         "noprobe", "serialize", "autotune", "noautotune",
1676                         "reset", "dma", "ata66", "minus8", "minus9",
1677                         "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1678                         "dtc2278", "umc8672", "ali14xx", NULL };
1679                 hw = s[3] - '0';
1680                 hwif = &ide_hwifs[hw];
1681                 i = match_parm(&s[4], ide_words, vals, 3);
1682
1683                 /*
1684                  * Cryptic check to ensure chipset not already set for hwif.
1685                  * Note: we can't depend on hwif->chipset here.
1686                  */
1687                 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1688                         /* chipset already specified */
1689                         if (is_chipset_set[hw])
1690                                 goto bad_option;
1691                         if (i > -18 && i <= -11) {
1692                                 /* these drivers are for "ide0=" only */
1693                                 if (hw != 0)
1694                                         goto bad_hwif;
1695                                 /* chipset already specified for 2nd port */
1696                                 if (is_chipset_set[hw+1])
1697                                         goto bad_option;
1698                         }
1699                         is_chipset_set[hw] = 1;
1700                         printk("\n");
1701                 }
1702
1703                 switch (i) {
1704 #ifdef CONFIG_BLK_DEV_ALI14XX
1705                         case -17: /* "ali14xx" */
1706                                 probe_ali14xx = 1;
1707                                 goto done;
1708 #endif
1709 #ifdef CONFIG_BLK_DEV_UMC8672
1710                         case -16: /* "umc8672" */
1711                                 probe_umc8672 = 1;
1712                                 goto done;
1713 #endif
1714 #ifdef CONFIG_BLK_DEV_DTC2278
1715                         case -15: /* "dtc2278" */
1716                                 probe_dtc2278 = 1;
1717                                 goto done;
1718 #endif
1719 #ifdef CONFIG_BLK_DEV_CMD640
1720                         case -14: /* "cmd640_vlb" */
1721                         {
1722                                 extern int cmd640_vlb; /* flag for cmd640.c */
1723                                 cmd640_vlb = 1;
1724                                 goto done;
1725                         }
1726 #endif
1727 #ifdef CONFIG_BLK_DEV_HT6560B
1728                         case -13: /* "ht6560b" */
1729                                 probe_ht6560b = 1;
1730                                 goto done;
1731 #endif
1732 #ifdef CONFIG_BLK_DEV_QD65XX
1733                         case -12: /* "qd65xx" */
1734                                 probe_qd65xx = 1;
1735                                 goto done;
1736 #endif
1737 #ifdef CONFIG_BLK_DEV_4DRIVES
1738                         case -11: /* "four" drives on one set of ports */
1739                         {
1740                                 ide_hwif_t *mate = &ide_hwifs[hw^1];
1741                                 mate->drives[0].select.all ^= 0x20;
1742                                 mate->drives[1].select.all ^= 0x20;
1743                                 hwif->chipset = mate->chipset = ide_4drives;
1744                                 mate->irq = hwif->irq;
1745                                 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1746                                 goto do_serialize;
1747                         }
1748 #endif /* CONFIG_BLK_DEV_4DRIVES */
1749                         case -10: /* minus10 */
1750                         case -9: /* minus9 */
1751                         case -8: /* minus8 */
1752                                 goto bad_option;
1753                         case -7: /* ata66 */
1754 #ifdef CONFIG_BLK_DEV_IDEPCI
1755                                 hwif->udma_four = 1;
1756                                 goto obsolete_option;
1757 #else
1758                                 goto bad_hwif;
1759 #endif
1760                         case -6: /* dma */
1761                                 hwif->autodma = 1;
1762                                 goto obsolete_option;
1763                         case -5: /* "reset" */
1764                                 hwif->reset = 1;
1765                                 goto obsolete_option;
1766                         case -4: /* "noautotune" */
1767                                 hwif->drives[0].autotune = IDE_TUNE_NOAUTO;
1768                                 hwif->drives[1].autotune = IDE_TUNE_NOAUTO;
1769                                 goto obsolete_option;
1770                         case -3: /* "autotune" */
1771                                 hwif->drives[0].autotune = IDE_TUNE_AUTO;
1772                                 hwif->drives[1].autotune = IDE_TUNE_AUTO;
1773                                 goto obsolete_option;
1774                         case -2: /* "serialize" */
1775                         do_serialize:
1776                                 hwif->mate = &ide_hwifs[hw^1];
1777                                 hwif->mate->mate = hwif;
1778                                 hwif->serialized = hwif->mate->serialized = 1;
1779                                 goto obsolete_option;
1780
1781                         case -1: /* "noprobe" */
1782                                 hwif->noprobe = 1;
1783                                 goto done;
1784
1785                         case 1: /* base */
1786                                 vals[1] = vals[0] + 0x206; /* default ctl */
1787                         case 2: /* base,ctl */
1788                                 vals[2] = 0;    /* default irq = probe for it */
1789                         case 3: /* base,ctl,irq */
1790                                 hwif->hw.irq = vals[2];
1791                                 ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq);
1792                                 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
1793                                 hwif->irq      = vals[2];
1794                                 hwif->noprobe  = 0;
1795                                 hwif->chipset  = ide_forced;
1796                                 goto obsolete_option;
1797
1798                         case 0: goto bad_option;
1799                         default:
1800                                 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1801                                 return 1;
1802                 }
1803         }
1804 bad_option:
1805         printk(" -- BAD OPTION\n");
1806         return 1;
1807 obsolete_option:
1808         printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1809         return 1;
1810 bad_hwif:
1811         printk("-- NOT SUPPORTED ON ide%d", hw);
1812 done:
1813         printk("\n");
1814         return 1;
1815 }
1816
1817 extern void __init pnpide_init(void);
1818 extern void __exit pnpide_exit(void);
1819 extern void __init h8300_ide_init(void);
1820
1821 /*
1822  * probe_for_hwifs() finds/initializes "known" IDE interfaces
1823  */
1824 static void __init probe_for_hwifs (void)
1825 {
1826 #ifdef CONFIG_BLK_DEV_IDEPCI
1827         ide_scan_pcibus(ide_scan_direction);
1828 #endif /* CONFIG_BLK_DEV_IDEPCI */
1829
1830 #ifdef CONFIG_ETRAX_IDE
1831         {
1832                 extern void init_e100_ide(void);
1833                 init_e100_ide();
1834         }
1835 #endif /* CONFIG_ETRAX_IDE */
1836 #ifdef CONFIG_BLK_DEV_CMD640
1837         {
1838                 extern void ide_probe_for_cmd640x(void);
1839                 ide_probe_for_cmd640x();
1840         }
1841 #endif /* CONFIG_BLK_DEV_CMD640 */
1842 #ifdef CONFIG_BLK_DEV_IDE_PMAC
1843         {
1844                 extern void pmac_ide_probe(void);
1845                 pmac_ide_probe();
1846         }
1847 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
1848 #ifdef CONFIG_BLK_DEV_GAYLE
1849         {
1850                 extern void gayle_init(void);
1851                 gayle_init();
1852         }
1853 #endif /* CONFIG_BLK_DEV_GAYLE */
1854 #ifdef CONFIG_BLK_DEV_FALCON_IDE
1855         {
1856                 extern void falconide_init(void);
1857                 falconide_init();
1858         }
1859 #endif /* CONFIG_BLK_DEV_FALCON_IDE */
1860 #ifdef CONFIG_BLK_DEV_MAC_IDE
1861         {
1862                 extern void macide_init(void);
1863                 macide_init();
1864         }
1865 #endif /* CONFIG_BLK_DEV_MAC_IDE */
1866 #ifdef CONFIG_BLK_DEV_Q40IDE
1867         {
1868                 extern void q40ide_init(void);
1869                 q40ide_init();
1870         }
1871 #endif /* CONFIG_BLK_DEV_Q40IDE */
1872 #ifdef CONFIG_BLK_DEV_BUDDHA
1873         {
1874                 extern void buddha_init(void);
1875                 buddha_init();
1876         }
1877 #endif /* CONFIG_BLK_DEV_BUDDHA */
1878 #ifdef CONFIG_BLK_DEV_IDEPNP
1879         pnpide_init();
1880 #endif
1881 #ifdef CONFIG_H8300
1882         h8300_ide_init();
1883 #endif
1884 }
1885
1886 void ide_register_subdriver(ide_drive_t *drive, ide_driver_t *driver)
1887 {
1888 #ifdef CONFIG_PROC_FS
1889         ide_add_proc_entries(drive->proc, driver->proc, drive);
1890 #endif
1891 }
1892
1893 EXPORT_SYMBOL(ide_register_subdriver);
1894
1895 /**
1896  *      ide_unregister_subdriver        -       disconnect drive from driver
1897  *      @drive: drive to unplug
1898  *      @driver: driver
1899  *
1900  *      Disconnect a drive from the driver it was attached to and then
1901  *      clean up the various proc files and other objects attached to it.
1902  *
1903  *      Takes ide_setting_sem and ide_lock.
1904  *      Caller must hold none of the locks.
1905  */
1906
1907 void ide_unregister_subdriver(ide_drive_t *drive, ide_driver_t *driver)
1908 {
1909         unsigned long flags;
1910
1911 #ifdef CONFIG_PROC_FS
1912         ide_remove_proc_entries(drive->proc, driver->proc);
1913 #endif
1914         down(&ide_setting_sem);
1915         spin_lock_irqsave(&ide_lock, flags);
1916         /*
1917          * ide_setting_sem protects the settings list
1918          * ide_lock protects the use of settings
1919          *
1920          * so we need to hold both, ide_settings_sem because we want to
1921          * modify the settings list, and ide_lock because we cannot take
1922          * a setting out that is being used.
1923          *
1924          * OTOH both ide_{read,write}_setting are only ever used under
1925          * ide_setting_sem.
1926          */
1927         auto_remove_settings(drive);
1928         spin_unlock_irqrestore(&ide_lock, flags);
1929         up(&ide_setting_sem);
1930 }
1931
1932 EXPORT_SYMBOL(ide_unregister_subdriver);
1933
1934 /*
1935  * Probe module
1936  */
1937
1938 EXPORT_SYMBOL(ide_lock);
1939
1940 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1941 {
1942         return 1;
1943 }
1944
1945 static char *media_string(ide_drive_t *drive)
1946 {
1947         switch (drive->media) {
1948         case ide_disk:
1949                 return "disk";
1950         case ide_cdrom:
1951                 return "cdrom";
1952         case ide_tape:
1953                 return "tape";
1954         case ide_floppy:
1955                 return "floppy";
1956         default:
1957                 return "UNKNOWN";
1958         }
1959 }
1960
1961 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1962 {
1963         ide_drive_t *drive = to_ide_device(dev);
1964         return sprintf(buf, "%s\n", media_string(drive));
1965 }
1966
1967 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1968 {
1969         ide_drive_t *drive = to_ide_device(dev);
1970         return sprintf(buf, "%s\n", drive->name);
1971 }
1972
1973 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1974 {
1975         ide_drive_t *drive = to_ide_device(dev);
1976         return sprintf(buf, "ide:m-%s\n", media_string(drive));
1977 }
1978
1979 static struct device_attribute ide_dev_attrs[] = {
1980         __ATTR_RO(media),
1981         __ATTR_RO(drivename),
1982         __ATTR_RO(modalias),
1983         __ATTR_NULL
1984 };
1985
1986 static int ide_uevent(struct device *dev, char **envp, int num_envp,
1987                       char *buffer, int buffer_size)
1988 {
1989         ide_drive_t *drive = to_ide_device(dev);
1990         int i = 0;
1991         int length = 0;
1992
1993         add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1994                        "MEDIA=%s", media_string(drive));
1995         add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1996                        "DRIVENAME=%s", drive->name);
1997         add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1998                        "MODALIAS=ide:m-%s", media_string(drive));
1999         envp[i] = NULL;
2000         return 0;
2001 }
2002
2003 static int generic_ide_probe(struct device *dev)
2004 {
2005         ide_drive_t *drive = to_ide_device(dev);
2006         ide_driver_t *drv = to_ide_driver(dev->driver);
2007
2008         return drv->probe ? drv->probe(drive) : -ENODEV;
2009 }
2010
2011 static int generic_ide_remove(struct device *dev)
2012 {
2013         ide_drive_t *drive = to_ide_device(dev);
2014         ide_driver_t *drv = to_ide_driver(dev->driver);
2015
2016         if (drv->remove)
2017                 drv->remove(drive);
2018
2019         return 0;
2020 }
2021
2022 static void generic_ide_shutdown(struct device *dev)
2023 {
2024         ide_drive_t *drive = to_ide_device(dev);
2025         ide_driver_t *drv = to_ide_driver(dev->driver);
2026
2027         if (dev->driver && drv->shutdown)
2028                 drv->shutdown(drive);
2029 }
2030
2031 struct bus_type ide_bus_type = {
2032         .name           = "ide",
2033         .match          = ide_bus_match,
2034         .uevent         = ide_uevent,
2035         .probe          = generic_ide_probe,
2036         .remove         = generic_ide_remove,
2037         .shutdown       = generic_ide_shutdown,
2038         .dev_attrs      = ide_dev_attrs,
2039         .suspend        = generic_ide_suspend,
2040         .resume         = generic_ide_resume,
2041 };
2042
2043 EXPORT_SYMBOL_GPL(ide_bus_type);
2044
2045 /*
2046  * This is gets invoked once during initialization, to set *everything* up
2047  */
2048 static int __init ide_init(void)
2049 {
2050         int ret;
2051
2052         printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
2053         system_bus_speed = ide_system_bus_speed();
2054
2055         ret = bus_register(&ide_bus_type);
2056         if (ret < 0) {
2057                 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
2058                 return ret;
2059         }
2060
2061         init_ide_data();
2062
2063 #ifdef CONFIG_PROC_FS
2064         proc_ide_root = proc_mkdir("ide", NULL);
2065 #endif
2066
2067 #ifdef CONFIG_BLK_DEV_ALI14XX
2068         if (probe_ali14xx)
2069                 (void)ali14xx_init();
2070 #endif
2071 #ifdef CONFIG_BLK_DEV_UMC8672
2072         if (probe_umc8672)
2073                 (void)umc8672_init();
2074 #endif
2075 #ifdef CONFIG_BLK_DEV_DTC2278
2076         if (probe_dtc2278)
2077                 (void)dtc2278_init();
2078 #endif
2079 #ifdef CONFIG_BLK_DEV_HT6560B
2080         if (probe_ht6560b)
2081                 (void)ht6560b_init();
2082 #endif
2083 #ifdef CONFIG_BLK_DEV_QD65XX
2084         if (probe_qd65xx)
2085                 (void)qd65xx_init();
2086 #endif
2087
2088         initializing = 1;
2089         /* Probe for special PCI and other "known" interface chipsets. */
2090         probe_for_hwifs();
2091         initializing = 0;
2092
2093 #ifdef CONFIG_PROC_FS
2094         proc_ide_create();
2095 #endif
2096         return 0;
2097 }
2098
2099 #ifdef MODULE
2100 static char *options = NULL;
2101 module_param(options, charp, 0);
2102 MODULE_LICENSE("GPL");
2103
2104 static void __init parse_options (char *line)
2105 {
2106         char *next = line;
2107
2108         if (line == NULL || !*line)
2109                 return;
2110         while ((line = next) != NULL) {
2111                 if ((next = strchr(line,' ')) != NULL)
2112                         *next++ = 0;
2113                 if (!ide_setup(line))
2114                         printk (KERN_INFO "Unknown option '%s'\n", line);
2115         }
2116 }
2117
2118 int __init init_module (void)
2119 {
2120         parse_options(options);
2121         return ide_init();
2122 }
2123
2124 void __exit cleanup_module (void)
2125 {
2126         int index;
2127
2128         for (index = 0; index < MAX_HWIFS; ++index)
2129                 ide_unregister(index);
2130
2131 #ifdef CONFIG_BLK_DEV_IDEPNP
2132         pnpide_exit();
2133 #endif
2134
2135 #ifdef CONFIG_PROC_FS
2136         proc_ide_destroy();
2137 #endif
2138
2139         bus_unregister(&ide_bus_type);
2140 }
2141
2142 #else /* !MODULE */
2143
2144 __setup("", ide_setup);
2145
2146 module_init(ide_init);
2147
2148 #endif /* MODULE */