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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/config.h>
 134 #include <linux/module.h>
 135 #include <linux/types.h>
 136 #include <linux/string.h>
 137 #include <linux/kernel.h>
 138 #include <linux/timer.h>
 139 #include <linux/mm.h>
 140 #include <linux/interrupt.h>
 141 #include <linux/major.h>
 142 #include <linux/errno.h>
 143 #include <linux/genhd.h>
 144 #include <linux/blkpg.h>
 145 #include <linux/slab.h>
 146 #include <linux/init.h>
 147 #include <linux/pci.h>
 148 #include <linux/delay.h>
 149 #include <linux/ide.h>
 150 #include <linux/devfs_fs_kernel.h>
 151 #include <linux/completion.h>
 152 #include <linux/reboot.h>
 153 #include <linux/cdrom.h>
 154 #include <linux/seq_file.h>
 155 #include <linux/device.h>
 156 #include <linux/bitops.h>
 157
 158 #include <asm/byteorder.h>
 159 #include <asm/irq.h>
 160 #include <asm/uaccess.h>
 161 #include <asm/io.h>
 162
 163
 164 /* default maximum number of failures */
 165 #define IDE_DEFAULT_MAX_FAILURES        1
 166
 167 static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
 168                                         IDE2_MAJOR, IDE3_MAJOR,
 169                                         IDE4_MAJOR, IDE5_MAJOR,
 170                                         IDE6_MAJOR, IDE7_MAJOR,
 171                                         IDE8_MAJOR, IDE9_MAJOR };
 172
 173 static int idebus_parameter;    /* holds the "idebus=" parameter */
 174 static int system_bus_speed;    /* holds what we think is VESA/PCI bus speed */
 175 static int initializing;        /* set while initializing built-in drivers */
 176
 177 DECLARE_MUTEX(ide_cfg_sem);
 178  __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
 179
 180 #ifdef CONFIG_BLK_DEV_IDEPCI
 181 static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
 182 #endif
 183
 184 #ifdef CONFIG_IDEDMA_AUTO
 185 int noautodma = 0;
 186 #else
 187 int noautodma = 1;
 188 #endif
 189
 190 EXPORT_SYMBOL(noautodma);
 191
 192 /*
 193  * This is declared extern in ide.h, for access by other IDE modules:
 194  */
 195 ide_hwif_t ide_hwifs[MAX_HWIFS];        /* master data repository */
 196
 197 EXPORT_SYMBOL(ide_hwifs);
 198
 199 /*
 200  * Do not even *think* about calling this!
 201  */
 202 static void init_hwif_data(ide_hwif_t *hwif, unsigned int index)
 203 {
 204         unsigned int unit;
 205
 206         /* bulk initialize hwif & drive info with zeros */
 207         memset(hwif, 0, sizeof(ide_hwif_t));
 208
 209         /* fill in any non-zero initial values */
 210         hwif->index     = index;
 211         hwif->major     = ide_hwif_to_major[index];
 212
 213         hwif->name[0]   = 'i';
 214         hwif->name[1]   = 'd';
 215         hwif->name[2]   = 'e';
 216         hwif->name[3]   = '0' + index;
 217
 218         hwif->bus_state = BUSSTATE_ON;
 219
 220         hwif->atapi_dma = 0;            /* disable all atapi dma */
 221         hwif->ultra_mask = 0x80;        /* disable all ultra */
 222         hwif->mwdma_mask = 0x80;        /* disable all mwdma */
 223         hwif->swdma_mask = 0x80;        /* disable all swdma */
 224
 225         init_completion(&hwif->gendev_rel_comp);
 226
 227         default_hwif_iops(hwif);
 228         default_hwif_transport(hwif);
 229         for (unit = 0; unit < MAX_DRIVES; ++unit) {
 230                 ide_drive_t *drive = &hwif->drives[unit];
 231
 232                 drive->media                    = ide_disk;
 233                 drive->select.all               = (unit<<4)|0xa0;
 234                 drive->hwif                     = hwif;
 235                 drive->ctl                      = 0x08;
 236                 drive->ready_stat               = READY_STAT;
 237                 drive->bad_wstat                = BAD_W_STAT;
 238                 drive->special.b.recalibrate    = 1;
 239                 drive->special.b.set_geometry   = 1;
 240                 drive->name[0]                  = 'h';
 241                 drive->name[1]                  = 'd';
 242                 drive->name[2]                  = 'a' + (index * MAX_DRIVES) + unit;
 243                 drive->max_failures             = IDE_DEFAULT_MAX_FAILURES;
 244                 drive->using_dma                = 0;
 245                 drive->vdma                     = 0;
 246                 INIT_LIST_HEAD(&drive->list);
 247                 init_completion(&drive->gendev_rel_comp);
 248         }
 249 }
 250
 251 static void init_hwif_default(ide_hwif_t *hwif, unsigned int index)
 252 {
 253         hw_regs_t hw;
 254
 255         memset(&hw, 0, sizeof(hw_regs_t));
 256
 257         ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq);
 258
 259         memcpy(&hwif->hw, &hw, sizeof(hw));
 260         memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
 261
 262         hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
 263 #ifdef CONFIG_BLK_DEV_HD
 264         if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA)
 265                 hwif->noprobe = 1;      /* may be overridden by ide_setup() */
 266 #endif
 267 }
 268
 269 extern void ide_arm_init(void);
 270
 271 /*
 272  * init_ide_data() sets reasonable default values into all fields
 273  * of all instances of the hwifs and drives, but only on the first call.
 274  * Subsequent calls have no effect (they don't wipe out anything).
 275  *
 276  * This routine is normally called at driver initialization time,
 277  * but may also be called MUCH earlier during kernel "command-line"
 278  * parameter processing.  As such, we cannot depend on any other parts
 279  * of the kernel (such as memory allocation) to be functioning yet.
 280  *
 281  * This is too bad, as otherwise we could dynamically allocate the
 282  * ide_drive_t structs as needed, rather than always consuming memory
 283  * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
 284  *
 285  * FIXME: We should stuff the setup data into __init and copy the
 286  * relevant hwifs/allocate them properly during boot.
 287  */
 288 #define MAGIC_COOKIE 0x12345678
 289 static void __init init_ide_data (void)
 290 {
 291         ide_hwif_t *hwif;
 292         unsigned int index;
 293         static unsigned long magic_cookie = MAGIC_COOKIE;
 294
 295         if (magic_cookie != MAGIC_COOKIE)
 296                 return;         /* already initialized */
 297         magic_cookie = 0;
 298
 299         /* Initialise all interface structures */
 300         for (index = 0; index < MAX_HWIFS; ++index) {
 301                 hwif = &ide_hwifs[index];
 302                 init_hwif_data(hwif, index);
 303                 init_hwif_default(hwif, index);
 304 #if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
 305                 hwif->irq = hwif->hw.irq =
 306                         ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
 307 #endif
 308         }
 309 #ifdef CONFIG_IDE_ARM
 310         initializing = 1;
 311         ide_arm_init();
 312         initializing = 0;
 313 #endif
 314 }
 315
 316 /**
 317  *      ide_system_bus_speed    -       guess bus speed
 318  *
 319  *      ide_system_bus_speed() returns what we think is the system VESA/PCI
 320  *      bus speed (in MHz). This is used for calculating interface PIO timings.
 321  *      The default is 40 for known PCI systems, 50 otherwise.
 322  *      The "idebus=xx" parameter can be used to override this value.
 323  *      The actual value to be used is computed/displayed the first time
 324  *      through. Drivers should only use this as a last resort.
 325  *
 326  *      Returns a guessed speed in MHz.
 327  */
 328
 329 static int ide_system_bus_speed(void)
 330 {
 331 #ifdef CONFIG_PCI
 332         static struct pci_device_id pci_default[] = {
 333                 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
 334                 { }
 335         };
 336 #else
 337 #define pci_default 0
 338 #endif /* CONFIG_PCI */
 339
 340         if (!system_bus_speed) {
 341                 if (idebus_parameter) {
 342                         /* user supplied value */
 343                         system_bus_speed = idebus_parameter;
 344                 } else if (pci_dev_present(pci_default)) {
 345                         /* safe default value for PCI */
 346                         system_bus_speed = 33;
 347                 } else {
 348                         /* safe default value for VESA and PCI */
 349                         system_bus_speed = 50;
 350                 }
 351                 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
 352                         "for PIO modes%s\n", system_bus_speed,
 353                         idebus_parameter ? "" : "; override with idebus=xx");
 354         }
 355         return system_bus_speed;
 356 }
 357
 358 #ifdef CONFIG_PROC_FS
 359 struct proc_dir_entry *proc_ide_root;
 360 #endif
 361
 362 static struct resource* hwif_request_region(ide_hwif_t *hwif,
 363                                             unsigned long addr, int num)
 364 {
 365         struct resource *res = request_region(addr, num, hwif->name);
 366
 367         if (!res)
 368                 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
 369                                 hwif->name, addr, addr+num-1);
 370         return res;
 371 }
 372
 373 /**
 374  *      ide_hwif_request_regions - request resources for IDE
 375  *      @hwif: interface to use
 376  *
 377  *      Requests all the needed resources for an interface.
 378  *      Right now core IDE code does this work which is deeply wrong.
 379  *      MMIO leaves it to the controller driver,
 380  *      PIO will migrate this way over time.
 381  */
 382
 383 int ide_hwif_request_regions(ide_hwif_t *hwif)
 384 {
 385         unsigned long addr;
 386         unsigned int i;
 387
 388         if (hwif->mmio == 2)
 389                 return 0;
 390         BUG_ON(hwif->mmio == 1);
 391         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
 392         if (addr && !hwif_request_region(hwif, addr, 1))
 393                 goto control_region_busy;
 394         hwif->straight8 = 0;
 395         addr = hwif->io_ports[IDE_DATA_OFFSET];
 396         if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
 397                 if (!hwif_request_region(hwif, addr, 8))
 398                         goto data_region_busy;
 399                 hwif->straight8 = 1;
 400                 return 0;
 401         }
 402         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
 403                 addr = hwif->io_ports[i];
 404                 if (!hwif_request_region(hwif, addr, 1)) {
 405                         while (--i)
 406                                 release_region(addr, 1);
 407                         goto data_region_busy;
 408                 }
 409         }
 410         return 0;
 411
 412 data_region_busy:
 413         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
 414         if (addr)
 415                 release_region(addr, 1);
 416 control_region_busy:
 417         /* If any errors are return, we drop the hwif interface. */
 418         return -EBUSY;
 419 }
 420
 421 /**
 422  *      ide_hwif_release_regions - free IDE resources
 423  *
 424  *      Note that we only release the standard ports,
 425  *      and do not even try to handle any extra ports
 426  *      allocated for weird IDE interface chipsets.
 427  *
 428  *      Note also that we don't yet handle mmio resources here. More
 429  *      importantly our caller should be doing this so we need to
 430  *      restructure this as a helper function for drivers.
 431  */
 432
 433 void ide_hwif_release_regions(ide_hwif_t *hwif)
 434 {
 435         u32 i = 0;
 436
 437         if (hwif->mmio == 2)
 438                 return;
 439         if (hwif->io_ports[IDE_CONTROL_OFFSET])
 440                 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
 441         if (hwif->straight8) {
 442                 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
 443                 return;
 444         }
 445         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
 446                 if (hwif->io_ports[i])
 447                         release_region(hwif->io_ports[i], 1);
 448 }
 449
 450 /**
 451  *      ide_hwif_restore        -       restore hwif to template
 452  *      @hwif: hwif to update
 453  *      @tmp_hwif: template
 454  *
 455  *      Restore hwif to a previous state by copying most settngs
 456  *      from the template.
 457  */
 458
 459 static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
 460 {
 461         hwif->hwgroup                   = tmp_hwif->hwgroup;
 462
 463         hwif->gendev.parent             = tmp_hwif->gendev.parent;
 464
 465         hwif->proc                      = tmp_hwif->proc;
 466
 467         hwif->major                     = tmp_hwif->major;
 468         hwif->straight8                 = tmp_hwif->straight8;
 469         hwif->bus_state                 = tmp_hwif->bus_state;
 470
 471         hwif->atapi_dma                 = tmp_hwif->atapi_dma;
 472         hwif->ultra_mask                = tmp_hwif->ultra_mask;
 473         hwif->mwdma_mask                = tmp_hwif->mwdma_mask;
 474         hwif->swdma_mask                = tmp_hwif->swdma_mask;
 475
 476         hwif->chipset                   = tmp_hwif->chipset;
 477         hwif->hold                      = tmp_hwif->hold;
 478
 479 #ifdef CONFIG_BLK_DEV_IDEPCI
 480         hwif->pci_dev                   = tmp_hwif->pci_dev;
 481         hwif->cds                       = tmp_hwif->cds;
 482 #endif
 483
 484         hwif->tuneproc                  = tmp_hwif->tuneproc;
 485         hwif->speedproc                 = tmp_hwif->speedproc;
 486         hwif->selectproc                = tmp_hwif->selectproc;
 487         hwif->reset_poll                = tmp_hwif->reset_poll;
 488         hwif->pre_reset                 = tmp_hwif->pre_reset;
 489         hwif->resetproc                 = tmp_hwif->resetproc;
 490         hwif->intrproc                  = tmp_hwif->intrproc;
 491         hwif->maskproc                  = tmp_hwif->maskproc;
 492         hwif->quirkproc                 = tmp_hwif->quirkproc;
 493         hwif->busproc                   = tmp_hwif->busproc;
 494
 495         hwif->ata_input_data            = tmp_hwif->ata_input_data;
 496         hwif->ata_output_data           = tmp_hwif->ata_output_data;
 497         hwif->atapi_input_bytes         = tmp_hwif->atapi_input_bytes;
 498         hwif->atapi_output_bytes        = tmp_hwif->atapi_output_bytes;
 499
 500         hwif->dma_setup                 = tmp_hwif->dma_setup;
 501         hwif->dma_exec_cmd              = tmp_hwif->dma_exec_cmd;
 502         hwif->dma_start                 = tmp_hwif->dma_start;
 503         hwif->ide_dma_end               = tmp_hwif->ide_dma_end;
 504         hwif->ide_dma_check             = tmp_hwif->ide_dma_check;
 505         hwif->ide_dma_on                = tmp_hwif->ide_dma_on;
 506         hwif->ide_dma_off_quietly       = tmp_hwif->ide_dma_off_quietly;
 507         hwif->ide_dma_test_irq          = tmp_hwif->ide_dma_test_irq;
 508         hwif->ide_dma_host_on           = tmp_hwif->ide_dma_host_on;
 509         hwif->ide_dma_host_off          = tmp_hwif->ide_dma_host_off;
 510         hwif->ide_dma_lostirq           = tmp_hwif->ide_dma_lostirq;
 511         hwif->ide_dma_timeout           = tmp_hwif->ide_dma_timeout;
 512
 513         hwif->OUTB                      = tmp_hwif->OUTB;
 514         hwif->OUTBSYNC                  = tmp_hwif->OUTBSYNC;
 515         hwif->OUTW                      = tmp_hwif->OUTW;
 516         hwif->OUTL                      = tmp_hwif->OUTL;
 517         hwif->OUTSW                     = tmp_hwif->OUTSW;
 518         hwif->OUTSL                     = tmp_hwif->OUTSL;
 519
 520         hwif->INB                       = tmp_hwif->INB;
 521         hwif->INW                       = tmp_hwif->INW;
 522         hwif->INL                       = tmp_hwif->INL;
 523         hwif->INSW                      = tmp_hwif->INSW;
 524         hwif->INSL                      = tmp_hwif->INSL;
 525
 526         hwif->sg_max_nents              = tmp_hwif->sg_max_nents;
 527
 528         hwif->mmio                      = tmp_hwif->mmio;
 529         hwif->rqsize                    = tmp_hwif->rqsize;
 530         hwif->no_lba48                  = tmp_hwif->no_lba48;
 531
 532 #ifndef CONFIG_BLK_DEV_IDECS
 533         hwif->irq                       = tmp_hwif->irq;
 534 #endif
 535
 536         hwif->dma_base                  = tmp_hwif->dma_base;
 537         hwif->dma_master                = tmp_hwif->dma_master;
 538         hwif->dma_command               = tmp_hwif->dma_command;
 539         hwif->dma_vendor1               = tmp_hwif->dma_vendor1;
 540         hwif->dma_status                = tmp_hwif->dma_status;
 541         hwif->dma_vendor3               = tmp_hwif->dma_vendor3;
 542         hwif->dma_prdtable              = tmp_hwif->dma_prdtable;
 543
 544         hwif->dma_extra                 = tmp_hwif->dma_extra;
 545         hwif->config_data               = tmp_hwif->config_data;
 546         hwif->select_data               = tmp_hwif->select_data;
 547         hwif->autodma                   = tmp_hwif->autodma;
 548         hwif->udma_four                 = tmp_hwif->udma_four;
 549         hwif->no_dsc                    = tmp_hwif->no_dsc;
 550
 551         hwif->hwif_data                 = tmp_hwif->hwif_data;
 552 }
 553
 554 /**
 555  *      ide_unregister          -       free an ide interface
 556  *      @index: index of interface (will change soon to a pointer)
 557  *
 558  *      Perform the final unregister of an IDE interface. At the moment
 559  *      we don't refcount interfaces so this will also get split up.
 560  *
 561  *      Locking:
 562  *      The caller must not hold the IDE locks
 563  *      The drive present/vanishing is not yet properly locked
 564  *      Take care with the callbacks. These have been split to avoid
 565  *      deadlocking the IDE layer. The shutdown callback is called
 566  *      before we take the lock and free resources. It is up to the
 567  *      caller to be sure there is no pending I/O here, and that
 568  *      the interfce will not be reopened (present/vanishing locking
 569  *      isnt yet done btw). After we commit to the final kill we
 570  *      call the cleanup callback with the ide locks held.
 571  *
 572  *      Unregister restores the hwif structures to the default state.
 573  *      This is raving bonkers.
 574  */
 575
 576 void ide_unregister(unsigned int index)
 577 {
 578         ide_drive_t *drive;
 579         ide_hwif_t *hwif, *g;
 580         static ide_hwif_t tmp_hwif; /* protected by ide_cfg_sem */
 581         ide_hwgroup_t *hwgroup;
 582         int irq_count = 0, unit;
 583
 584         BUG_ON(index >= MAX_HWIFS);
 585
 586         BUG_ON(in_interrupt());
 587         BUG_ON(irqs_disabled());
 588         down(&ide_cfg_sem);
 589         spin_lock_irq(&ide_lock);
 590         hwif = &ide_hwifs[index];
 591         if (!hwif->present)
 592                 goto abort;
 593         for (unit = 0; unit < MAX_DRIVES; ++unit) {
 594                 drive = &hwif->drives[unit];
 595                 if (!drive->present) {
 596                         if (drive->devfs_name[0] != '\0') {
 597                                 devfs_remove(drive->devfs_name);
 598                                 drive->devfs_name[0] = '\0';
 599                         }
 600                         continue;
 601                 }
 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
 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         for (i = 0; i < IDE_NR_PORTS; i++) {
 730                 if (offsets[i] == -1) {
 731                         switch(i) {
 732                                 case IDE_CONTROL_OFFSET:
 733                                         hw->io_ports[i] = ctrl;
 734                                         break;
 735 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
 736                                 case IDE_IRQ_OFFSET:
 737                                         hw->io_ports[i] = intr;
 738                                         break;
 739 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
 740                                 default:
 741                                         hw->io_ports[i] = 0;
 742                                         break;
 743                         }
 744                 } else {
 745                         hw->io_ports[i] = base + offsets[i];
 746                 }
 747         }
 748         hw->irq = irq;
 749         hw->dma = NO_DMA;
 750         hw->ack_intr = ack_intr;
 751 /*
 752  *      hw->iops = iops;
 753  */
 754 }
 755
 756 /**
 757  *      ide_register_hw_with_fixup      -       register IDE interface
 758  *      @hw: hardware registers
 759  *      @hwifp: pointer to returned hwif
 760  *      @fixup: fixup function
 761  *
 762  *      Register an IDE interface, specifying exactly the registers etc.
 763  *      Set init=1 iff calling before probes have taken place.
 764  *
 765  *      Returns -1 on error.
 766  */
 767
 768 int ide_register_hw_with_fixup(hw_regs_t *hw, ide_hwif_t **hwifp, void(*fixup)(ide_hwif_t *hwif))
 769 {
 770         int index, retry = 1;
 771         ide_hwif_t *hwif;
 772
 773         do {
 774                 for (index = 0; index < MAX_HWIFS; ++index) {
 775                         hwif = &ide_hwifs[index];
 776                         if (hwif->hw.io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
 777                                 goto found;
 778                 }
 779                 for (index = 0; index < MAX_HWIFS; ++index) {
 780                         hwif = &ide_hwifs[index];
 781                         if (hwif->hold)
 782                                 continue;
 783                         if ((!hwif->present && !hwif->mate && !initializing) ||
 784                             (!hwif->hw.io_ports[IDE_DATA_OFFSET] && initializing))
 785                                 goto found;
 786                 }
 787                 for (index = 0; index < MAX_HWIFS; index++)
 788                         ide_unregister(index);
 789         } while (retry--);
 790         return -1;
 791 found:
 792         if (hwif->present)
 793                 ide_unregister(index);
 794         else if (!hwif->hold) {
 795                 init_hwif_data(hwif, index);
 796                 init_hwif_default(hwif, index);
 797         }
 798         if (hwif->present)
 799                 return -1;
 800         memcpy(&hwif->hw, hw, sizeof(*hw));
 801         memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports));
 802         hwif->irq = hw->irq;
 803         hwif->noprobe = 0;
 804         hwif->chipset = hw->chipset;
 805         hwif->gendev.parent = hw->dev;
 806
 807         if (!initializing) {
 808                 probe_hwif_init_with_fixup(hwif, fixup);
 809                 create_proc_ide_interfaces();
 810         }
 811
 812         if (hwifp)
 813                 *hwifp = hwif;
 814
 815         return (initializing || hwif->present) ? index : -1;
 816 }
 817
 818 EXPORT_SYMBOL(ide_register_hw_with_fixup);
 819
 820 int ide_register_hw(hw_regs_t *hw, ide_hwif_t **hwifp)
 821 {
 822         return ide_register_hw_with_fixup(hw, hwifp, NULL);
 823 }
 824
 825 EXPORT_SYMBOL(ide_register_hw);
 826
 827 /*
 828  *      Locks for IDE setting functionality
 829  */
 830
 831 DECLARE_MUTEX(ide_setting_sem);
 832
 833 /**
 834  *      __ide_add_setting       -       add an ide setting option
 835  *      @drive: drive to use
 836  *      @name: setting name
 837  *      @rw: true if the function is read write
 838  *      @read_ioctl: function to call on read
 839  *      @write_ioctl: function to call on write
 840  *      @data_type: type of data
 841  *      @min: range minimum
 842  *      @max: range maximum
 843  *      @mul_factor: multiplication scale
 844  *      @div_factor: divison scale
 845  *      @data: private data field
 846  *      @set: setting
 847  *      @auto_remove: setting auto removal flag
 848  *
 849  *      Removes the setting named from the device if it is present.
 850  *      The function takes the settings_lock to protect against
 851  *      parallel changes. This function must not be called from IRQ
 852  *      context. Returns 0 on success or -1 on failure.
 853  *
 854  *      BUGS: This code is seriously over-engineered. There is also
 855  *      magic about how the driver specific features are setup. If
 856  *      a driver is attached we assume the driver settings are auto
 857  *      remove.
 858  */
 859
 860 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)
 861 {
 862         ide_settings_t **p = (ide_settings_t **) &drive->settings, *setting = NULL;
 863
 864         down(&ide_setting_sem);
 865         while ((*p) && strcmp((*p)->name, name) < 0)
 866                 p = &((*p)->next);
 867         if ((setting = kzalloc(sizeof(*setting), GFP_KERNEL)) == NULL)
 868                 goto abort;
 869         if ((setting->name = kmalloc(strlen(name) + 1, GFP_KERNEL)) == NULL)
 870                 goto abort;
 871         strcpy(setting->name, name);
 872         setting->rw = rw;
 873         setting->read_ioctl = read_ioctl;
 874         setting->write_ioctl = write_ioctl;
 875         setting->data_type = data_type;
 876         setting->min = min;
 877         setting->max = max;
 878         setting->mul_factor = mul_factor;
 879         setting->div_factor = div_factor;
 880         setting->data = data;
 881         setting->set = set;
 882
 883         setting->next = *p;
 884         if (auto_remove)
 885                 setting->auto_remove = 1;
 886         *p = setting;
 887         up(&ide_setting_sem);
 888         return 0;
 889 abort:
 890         up(&ide_setting_sem);
 891         kfree(setting);
 892         return -1;
 893 }
 894
 895 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)
 896 {
 897         return __ide_add_setting(drive, name, rw, read_ioctl, write_ioctl, data_type, min, max, mul_factor, div_factor, data, set, 1);
 898 }
 899
 900 EXPORT_SYMBOL(ide_add_setting);
 901
 902 /**
 903  *      __ide_remove_setting    -       remove an ide setting option
 904  *      @drive: drive to use
 905  *      @name: setting name
 906  *
 907  *      Removes the setting named from the device if it is present.
 908  *      The caller must hold the setting semaphore.
 909  */
 910
 911 static void __ide_remove_setting (ide_drive_t *drive, char *name)
 912 {
 913         ide_settings_t **p, *setting;
 914
 915         p = (ide_settings_t **) &drive->settings;
 916
 917         while ((*p) && strcmp((*p)->name, name))
 918                 p = &((*p)->next);
 919         if ((setting = (*p)) == NULL)
 920                 return;
 921
 922         (*p) = setting->next;
 923
 924         kfree(setting->name);
 925         kfree(setting);
 926 }
 927
 928 /**
 929  *      ide_find_setting_by_ioctl       -       find a drive specific ioctl
 930  *      @drive: drive to scan
 931  *      @cmd: ioctl command to handle
 932  *
 933  *      Scan's the device setting table for a matching entry and returns
 934  *      this or NULL if no entry is found. The caller must hold the
 935  *      setting semaphore
 936  */
 937
 938 static ide_settings_t *ide_find_setting_by_ioctl (ide_drive_t *drive, int cmd)
 939 {
 940         ide_settings_t *setting = drive->settings;
 941
 942         while (setting) {
 943                 if (setting->read_ioctl == cmd || setting->write_ioctl == cmd)
 944                         break;
 945                 setting = setting->next;
 946         }
 947
 948         return setting;
 949 }
 950
 951 /**
 952  *      ide_find_setting_by_name        -       find a drive specific setting
 953  *      @drive: drive to scan
 954  *      @name: setting name
 955  *
 956  *      Scan's the device setting table for a matching entry and returns
 957  *      this or NULL if no entry is found. The caller must hold the
 958  *      setting semaphore
 959  */
 960
 961 ide_settings_t *ide_find_setting_by_name (ide_drive_t *drive, char *name)
 962 {
 963         ide_settings_t *setting = drive->settings;
 964
 965         while (setting) {
 966                 if (strcmp(setting->name, name) == 0)
 967                         break;
 968                 setting = setting->next;
 969         }
 970         return setting;
 971 }
 972
 973 /**
 974  *      auto_remove_settings    -       remove driver specific settings
 975  *      @drive: drive
 976  *
 977  *      Automatically remove all the driver specific settings for this
 978  *      drive. This function may sleep and must not be called from IRQ
 979  *      context. The caller must hold ide_setting_sem.
 980  */
 981
 982 static void auto_remove_settings (ide_drive_t *drive)
 983 {
 984         ide_settings_t *setting;
 985 repeat:
 986         setting = drive->settings;
 987         while (setting) {
 988                 if (setting->auto_remove) {
 989                         __ide_remove_setting(drive, setting->name);
 990                         goto repeat;
 991                 }
 992                 setting = setting->next;
 993         }
 994 }
 995
 996 /**
 997  *      ide_read_setting        -       read an IDE setting
 998  *      @drive: drive to read from
 999  *      @setting: drive setting
1000  *
1001  *      Read a drive setting and return the value. The caller
1002  *      must hold the ide_setting_sem when making this call.
1003  *
1004  *      BUGS: the data return and error are the same return value
1005  *      so an error -EINVAL and true return of the same value cannot
1006  *      be told apart
1007  */
1008
1009 int ide_read_setting (ide_drive_t *drive, ide_settings_t *setting)
1010 {
1011         int             val = -EINVAL;
1012         unsigned long   flags;
1013
1014         if ((setting->rw & SETTING_READ)) {
1015                 spin_lock_irqsave(&ide_lock, flags);
1016                 switch(setting->data_type) {
1017                         case TYPE_BYTE:
1018                                 val = *((u8 *) setting->data);
1019                                 break;
1020                         case TYPE_SHORT:
1021                                 val = *((u16 *) setting->data);
1022                                 break;
1023                         case TYPE_INT:
1024                         case TYPE_INTA:
1025                                 val = *((u32 *) setting->data);
1026                                 break;
1027                 }
1028                 spin_unlock_irqrestore(&ide_lock, flags);
1029         }
1030         return val;
1031 }
1032
1033 /**
1034  *      ide_spin_wait_hwgroup   -       wait for group
1035  *      @drive: drive in the group
1036  *
1037  *      Wait for an IDE device group to go non busy and then return
1038  *      holding the ide_lock which guards the hwgroup->busy status
1039  *      and right to use it.
1040  */
1041
1042 int ide_spin_wait_hwgroup (ide_drive_t *drive)
1043 {
1044         ide_hwgroup_t *hwgroup = HWGROUP(drive);
1045         unsigned long timeout = jiffies + (3 * HZ);
1046
1047         spin_lock_irq(&ide_lock);
1048
1049         while (hwgroup->busy) {
1050                 unsigned long lflags;
1051                 spin_unlock_irq(&ide_lock);
1052                 local_irq_set(lflags);
1053                 if (time_after(jiffies, timeout)) {
1054                         local_irq_restore(lflags);
1055                         printk(KERN_ERR "%s: channel busy\n", drive->name);
1056                         return -EBUSY;
1057                 }
1058                 local_irq_restore(lflags);
1059                 spin_lock_irq(&ide_lock);
1060         }
1061         return 0;
1062 }
1063
1064 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
1065
1066 /**
1067  *      ide_write_setting       -       read an IDE setting
1068  *      @drive: drive to read from
1069  *      @setting: drive setting
1070  *      @val: value
1071  *
1072  *      Write a drive setting if it is possible. The caller
1073  *      must hold the ide_setting_sem when making this call.
1074  *
1075  *      BUGS: the data return and error are the same return value
1076  *      so an error -EINVAL and true return of the same value cannot
1077  *      be told apart
1078  *
1079  *      FIXME:  This should be changed to enqueue a special request
1080  *      to the driver to change settings, and then wait on a sema for completion.
1081  *      The current scheme of polling is kludgy, though safe enough.
1082  */
1083
1084 int ide_write_setting (ide_drive_t *drive, ide_settings_t *setting, int val)
1085 {
1086         int i;
1087         u32 *p;
1088
1089         if (!capable(CAP_SYS_ADMIN))
1090                 return -EACCES;
1091         if (!(setting->rw & SETTING_WRITE))
1092                 return -EPERM;
1093         if (val < setting->min || val > setting->max)
1094                 return -EINVAL;
1095         if (setting->set)
1096                 return setting->set(drive, val);
1097         if (ide_spin_wait_hwgroup(drive))
1098                 return -EBUSY;
1099         switch (setting->data_type) {
1100                 case TYPE_BYTE:
1101                         *((u8 *) setting->data) = val;
1102                         break;
1103                 case TYPE_SHORT:
1104                         *((u16 *) setting->data) = val;
1105                         break;
1106                 case TYPE_INT:
1107                         *((u32 *) setting->data) = val;
1108                         break;
1109                 case TYPE_INTA:
1110                         p = (u32 *) setting->data;
1111                         for (i = 0; i < 1 << PARTN_BITS; i++, p++)
1112                                 *p = val;
1113                         break;
1114         }
1115         spin_unlock_irq(&ide_lock);
1116         return 0;
1117 }
1118
1119 static int set_io_32bit(ide_drive_t *drive, int arg)
1120 {
1121         drive->io_32bit = arg;
1122 #ifdef CONFIG_BLK_DEV_DTC2278
1123         if (HWIF(drive)->chipset == ide_dtc2278)
1124                 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
1125 #endif /* CONFIG_BLK_DEV_DTC2278 */
1126         return 0;
1127 }
1128
1129 static int set_using_dma (ide_drive_t *drive, int arg)
1130 {
1131 #ifdef CONFIG_BLK_DEV_IDEDMA
1132         if (!drive->id || !(drive->id->capability & 1))
1133                 return -EPERM;
1134         if (HWIF(drive)->ide_dma_check == NULL)
1135                 return -EPERM;
1136         if (arg) {
1137                 if (HWIF(drive)->ide_dma_check(drive)) return -EIO;
1138                 if (HWIF(drive)->ide_dma_on(drive)) return -EIO;
1139         } else {
1140                 if (__ide_dma_off(drive))
1141                         return -EIO;
1142         }
1143         return 0;
1144 #else
1145         return -EPERM;
1146 #endif
1147 }
1148
1149 static int set_pio_mode (ide_drive_t *drive, int arg)
1150 {
1151         struct request rq;
1152
1153         if (!HWIF(drive)->tuneproc)
1154                 return -ENOSYS;
1155         if (drive->special.b.set_tune)
1156                 return -EBUSY;
1157         ide_init_drive_cmd(&rq);
1158         drive->tune_req = (u8) arg;
1159         drive->special.b.set_tune = 1;
1160         (void) ide_do_drive_cmd(drive, &rq, ide_wait);
1161         return 0;
1162 }
1163
1164 static int set_xfer_rate (ide_drive_t *drive, int arg)
1165 {
1166         int err = ide_wait_cmd(drive,
1167                         WIN_SETFEATURES, (u8) arg,
1168                         SETFEATURES_XFER, 0, NULL);
1169
1170         if (!err && arg) {
1171                 ide_set_xfer_rate(drive, (u8) arg);
1172                 ide_driveid_update(drive);
1173         }
1174         return err;
1175 }
1176
1177 /**
1178  *      ide_add_generic_settings        -       generic ide settings
1179  *      @drive: drive being configured
1180  *
1181  *      Add the generic parts of the system settings to the /proc files and
1182  *      ioctls for this IDE device. The caller must not be holding the
1183  *      ide_setting_sem.
1184  */
1185
1186 void ide_add_generic_settings (ide_drive_t *drive)
1187 {
1188 /*
1189  *                        drive         setting name            read/write access                               read ioctl              write ioctl             data type       min     max                             mul_factor      div_factor      data pointer                    set function
1190  */
1191         __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);
1192         __ide_add_setting(drive,        "keepsettings",         SETTING_RW,                                     HDIO_GET_KEEPSETTINGS,  HDIO_SET_KEEPSETTINGS,  TYPE_BYTE,      0,      1,                              1,              1,              &drive->keep_settings,          NULL,           0);
1193         __ide_add_setting(drive,        "nice1",                SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->nice1,                  NULL,           0);
1194         __ide_add_setting(drive,        "pio_mode",             SETTING_WRITE,                                  -1,                     HDIO_SET_PIO_MODE,      TYPE_BYTE,      0,      255,                            1,              1,              NULL,                           set_pio_mode,   0);
1195         __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);
1196         __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);
1197         __ide_add_setting(drive,        "init_speed",           SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->init_speed,             NULL,           0);
1198         __ide_add_setting(drive,        "current_speed",        SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->current_speed,          set_xfer_rate,  0);
1199         __ide_add_setting(drive,        "number",               SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      3,                              1,              1,              &drive->dn,                     NULL,           0);
1200 }
1201
1202 /**
1203  *      system_bus_clock        -       clock guess
1204  *
1205  *      External version of the bus clock guess used by very old IDE drivers
1206  *      for things like VLB timings. Should not be used.
1207  */
1208
1209 int system_bus_clock (void)
1210 {
1211         return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
1212 }
1213
1214 EXPORT_SYMBOL(system_bus_clock);
1215
1216 static int generic_ide_suspend(struct device *dev, pm_message_t state)
1217 {
1218         ide_drive_t *drive = dev->driver_data;
1219         struct request rq;
1220         struct request_pm_state rqpm;
1221         ide_task_t args;
1222
1223         memset(&rq, 0, sizeof(rq));
1224         memset(&rqpm, 0, sizeof(rqpm));
1225         memset(&args, 0, sizeof(args));
1226         rq.flags = REQ_PM_SUSPEND;
1227         rq.special = &args;
1228         rq.pm = &rqpm;
1229         rqpm.pm_step = ide_pm_state_start_suspend;
1230         rqpm.pm_state = state.event;
1231
1232         return ide_do_drive_cmd(drive, &rq, ide_wait);
1233 }
1234
1235 static int generic_ide_resume(struct device *dev)
1236 {
1237         ide_drive_t *drive = dev->driver_data;
1238         struct request rq;
1239         struct request_pm_state rqpm;
1240         ide_task_t args;
1241
1242         memset(&rq, 0, sizeof(rq));
1243         memset(&rqpm, 0, sizeof(rqpm));
1244         memset(&args, 0, sizeof(args));
1245         rq.flags = REQ_PM_RESUME;
1246         rq.special = &args;
1247         rq.pm = &rqpm;
1248         rqpm.pm_step = ide_pm_state_start_resume;
1249         rqpm.pm_state = PM_EVENT_ON;
1250
1251         return ide_do_drive_cmd(drive, &rq, ide_head_wait);
1252 }
1253
1254 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
1255                         unsigned int cmd, unsigned long arg)
1256 {
1257         ide_settings_t *setting;
1258         ide_driver_t *drv;
1259         int err = 0;
1260         void __user *p = (void __user *)arg;
1261
1262         down(&ide_setting_sem);
1263         if ((setting = ide_find_setting_by_ioctl(drive, cmd)) != NULL) {
1264                 if (cmd == setting->read_ioctl) {
1265                         err = ide_read_setting(drive, setting);
1266                         up(&ide_setting_sem);
1267                         return err >= 0 ? put_user(err, (long __user *)arg) : err;
1268                 } else {
1269                         if (bdev != bdev->bd_contains)
1270                                 err = -EINVAL;
1271                         else
1272                                 err = ide_write_setting(drive, setting, arg);
1273                         up(&ide_setting_sem);
1274                         return err;
1275                 }
1276         }
1277         up(&ide_setting_sem);
1278
1279         switch (cmd) {
1280                 case HDIO_OBSOLETE_IDENTITY:
1281                 case HDIO_GET_IDENTITY:
1282                         if (bdev != bdev->bd_contains)
1283                                 return -EINVAL;
1284                         if (drive->id_read == 0)
1285                                 return -ENOMSG;
1286                         if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1287                                 return -EFAULT;
1288                         return 0;
1289
1290                 case HDIO_GET_NICE:
1291                         return put_user(drive->dsc_overlap      <<      IDE_NICE_DSC_OVERLAP    |
1292                                         drive->atapi_overlap    <<      IDE_NICE_ATAPI_OVERLAP  |
1293                                         drive->nice0            <<      IDE_NICE_0              |
1294                                         drive->nice1            <<      IDE_NICE_1              |
1295                                         drive->nice2            <<      IDE_NICE_2,
1296                                         (long __user *) arg);
1297
1298 #ifdef CONFIG_IDE_TASK_IOCTL
1299                 case HDIO_DRIVE_TASKFILE:
1300                         if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1301                                 return -EACCES;
1302                         switch(drive->media) {
1303                                 case ide_disk:
1304                                         return ide_taskfile_ioctl(drive, cmd, arg);
1305                                 default:
1306                                         return -ENOMSG;
1307                         }
1308 #endif /* CONFIG_IDE_TASK_IOCTL */
1309
1310                 case HDIO_DRIVE_CMD:
1311                         if (!capable(CAP_SYS_RAWIO))
1312                                 return -EACCES;
1313                         return ide_cmd_ioctl(drive, cmd, arg);
1314
1315                 case HDIO_DRIVE_TASK:
1316                         if (!capable(CAP_SYS_RAWIO))
1317                                 return -EACCES;
1318                         return ide_task_ioctl(drive, cmd, arg);
1319
1320                 case HDIO_SCAN_HWIF:
1321                 {
1322                         hw_regs_t hw;
1323                         int args[3];
1324                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1325                         if (copy_from_user(args, p, 3 * sizeof(int)))
1326                                 return -EFAULT;
1327                         memset(&hw, 0, sizeof(hw));
1328                         ide_init_hwif_ports(&hw, (unsigned long) args[0],
1329                                             (unsigned long) args[1], NULL);
1330                         hw.irq = args[2];
1331                         if (ide_register_hw(&hw, NULL) == -1)
1332                                 return -EIO;
1333                         return 0;
1334                 }
1335                 case HDIO_UNREGISTER_HWIF:
1336                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1337                         /* (arg > MAX_HWIFS) checked in function */
1338                         ide_unregister(arg);
1339                         return 0;
1340                 case HDIO_SET_NICE:
1341                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1342                         if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1343                                 return -EPERM;
1344                         drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1345                         drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1346                         if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1347                                 drive->dsc_overlap = 0;
1348                                 return -EPERM;
1349                         }
1350                         drive->nice1 = (arg >> IDE_NICE_1) & 1;
1351                         return 0;
1352                 case HDIO_DRIVE_RESET:
1353                 {
1354                         unsigned long flags;
1355                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1356
1357                         /*
1358                          *      Abort the current command on the
1359                          *      group if there is one, taking
1360                          *      care not to allow anything else
1361                          *      to be queued and to die on the
1362                          *      spot if we miss one somehow
1363                          */
1364
1365                         spin_lock_irqsave(&ide_lock, flags);
1366
1367                         ide_abort(drive, "drive reset");
1368
1369                         if(HWGROUP(drive)->handler)
1370                                 BUG();
1371
1372                         /* Ensure nothing gets queued after we
1373                            drop the lock. Reset will clear the busy */
1374
1375                         HWGROUP(drive)->busy = 1;
1376                         spin_unlock_irqrestore(&ide_lock, flags);
1377                         (void) ide_do_reset(drive);
1378
1379                         return 0;
1380                 }
1381
1382                 case CDROMEJECT:
1383                 case CDROMCLOSETRAY:
1384                         return scsi_cmd_ioctl(file, bdev->bd_disk, cmd, p);
1385
1386                 case HDIO_GET_BUSSTATE:
1387                         if (!capable(CAP_SYS_ADMIN))
1388                                 return -EACCES;
1389                         if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1390                                 return -EFAULT;
1391                         return 0;
1392
1393                 case HDIO_SET_BUSSTATE:
1394                         if (!capable(CAP_SYS_ADMIN))
1395                                 return -EACCES;
1396                         if (HWIF(drive)->busproc)
1397                                 return HWIF(drive)->busproc(drive, (int)arg);
1398                         return -EOPNOTSUPP;
1399                 default:
1400                         return -EINVAL;
1401         }
1402 }
1403
1404 EXPORT_SYMBOL(generic_ide_ioctl);
1405
1406 /*
1407  * stridx() returns the offset of c within s,
1408  * or -1 if c is '\0' or not found within s.
1409  */
1410 static int __init stridx (const char *s, char c)
1411 {
1412         char *i = strchr(s, c);
1413         return (i && c) ? i - s : -1;
1414 }
1415
1416 /*
1417  * match_parm() does parsing for ide_setup():
1418  *
1419  * 1. the first char of s must be '='.
1420  * 2. if the remainder matches one of the supplied keywords,
1421  *     the index (1 based) of the keyword is negated and returned.
1422  * 3. if the remainder is a series of no more than max_vals numbers
1423  *     separated by commas, the numbers are saved in vals[] and a
1424  *     count of how many were saved is returned.  Base10 is assumed,
1425  *     and base16 is allowed when prefixed with "0x".
1426  * 4. otherwise, zero is returned.
1427  */
1428 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1429 {
1430         static const char *decimal = "0123456789";
1431         static const char *hex = "0123456789abcdef";
1432         int i, n;
1433
1434         if (*s++ == '=') {
1435                 /*
1436                  * Try matching against the supplied keywords,
1437                  * and return -(index+1) if we match one
1438                  */
1439                 if (keywords != NULL) {
1440                         for (i = 0; *keywords != NULL; ++i) {
1441                                 if (!strcmp(s, *keywords++))
1442                                         return -(i+1);
1443                         }
1444                 }
1445                 /*
1446                  * Look for a series of no more than "max_vals"
1447                  * numeric values separated by commas, in base10,
1448                  * or base16 when prefixed with "0x".
1449                  * Return a count of how many were found.
1450                  */
1451                 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1452                         vals[n] = i;
1453                         while ((i = stridx(decimal, *++s)) >= 0)
1454                                 vals[n] = (vals[n] * 10) + i;
1455                         if (*s == 'x' && !vals[n]) {
1456                                 while ((i = stridx(hex, *++s)) >= 0)
1457                                         vals[n] = (vals[n] * 0x10) + i;
1458                         }
1459                         if (++n == max_vals)
1460                                 break;
1461                         if (*s == ',' || *s == ';')
1462                                 ++s;
1463                 }
1464                 if (!*s)
1465                         return n;
1466         }
1467         return 0;       /* zero = nothing matched */
1468 }
1469
1470 #ifdef CONFIG_BLK_DEV_ALI14XX
1471 static int __initdata probe_ali14xx;
1472 extern int ali14xx_init(void);
1473 #endif
1474 #ifdef CONFIG_BLK_DEV_UMC8672
1475 static int __initdata probe_umc8672;
1476 extern int umc8672_init(void);
1477 #endif
1478 #ifdef CONFIG_BLK_DEV_DTC2278
1479 static int __initdata probe_dtc2278;
1480 extern int dtc2278_init(void);
1481 #endif
1482 #ifdef CONFIG_BLK_DEV_HT6560B
1483 static int __initdata probe_ht6560b;
1484 extern int ht6560b_init(void);
1485 #endif
1486 #ifdef CONFIG_BLK_DEV_QD65XX
1487 static int __initdata probe_qd65xx;
1488 extern int qd65xx_init(void);
1489 #endif
1490
1491 static int __initdata is_chipset_set[MAX_HWIFS];
1492
1493 /*
1494  * ide_setup() gets called VERY EARLY during initialization,
1495  * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1496  *
1497  * Remember to update Documentation/ide.txt if you change something here.
1498  */
1499 static int __init ide_setup(char *s)
1500 {
1501         int i, vals[3];
1502         ide_hwif_t *hwif;
1503         ide_drive_t *drive;
1504         unsigned int hw, unit;
1505         const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1506         const char max_hwif  = '0' + (MAX_HWIFS - 1);
1507
1508
1509         if (strncmp(s,"hd",2) == 0 && s[2] == '=')      /* hd= is for hd.c   */
1510                 return 0;                               /* driver and not us */
1511
1512         if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1513                 return 0;
1514
1515         printk(KERN_INFO "ide_setup: %s", s);
1516         init_ide_data ();
1517
1518 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1519         if (!strcmp(s, "ide=doubler")) {
1520                 extern int ide_doubler;
1521
1522                 printk(" : Enabled support for IDE doublers\n");
1523                 ide_doubler = 1;
1524                 return 1;
1525         }
1526 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1527
1528         if (!strcmp(s, "ide=nodma")) {
1529                 printk(" : Prevented DMA\n");
1530                 noautodma = 1;
1531                 return 1;
1532         }
1533
1534 #ifdef CONFIG_BLK_DEV_IDEPCI
1535         if (!strcmp(s, "ide=reverse")) {
1536                 ide_scan_direction = 1;
1537                 printk(" : Enabled support for IDE inverse scan order.\n");
1538                 return 1;
1539         }
1540 #endif /* CONFIG_BLK_DEV_IDEPCI */
1541
1542         /*
1543          * Look for drive options:  "hdx="
1544          */
1545         if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1546                 const char *hd_words[] = {
1547                         "none", "noprobe", "nowerr", "cdrom", "serialize",
1548                         "autotune", "noautotune", "minus8", "swapdata", "bswap",
1549                         "minus11", "remap", "remap63", "scsi", NULL };
1550                 unit = s[2] - 'a';
1551                 hw   = unit / MAX_DRIVES;
1552                 unit = unit % MAX_DRIVES;
1553                 hwif = &ide_hwifs[hw];
1554                 drive = &hwif->drives[unit];
1555                 if (strncmp(s + 4, "ide-", 4) == 0) {
1556                         strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1557                         goto done;
1558                 }
1559                 switch (match_parm(&s[3], hd_words, vals, 3)) {
1560                         case -1: /* "none" */
1561                         case -2: /* "noprobe" */
1562                                 drive->noprobe = 1;
1563                                 goto done;
1564                         case -3: /* "nowerr" */
1565                                 drive->bad_wstat = BAD_R_STAT;
1566                                 hwif->noprobe = 0;
1567                                 goto done;
1568                         case -4: /* "cdrom" */
1569                                 drive->present = 1;
1570                                 drive->media = ide_cdrom;
1571                                 /* an ATAPI device ignores DRDY */
1572                                 drive->ready_stat = 0;
1573                                 hwif->noprobe = 0;
1574                                 goto done;
1575                         case -5: /* "serialize" */
1576                                 printk(" -- USE \"ide%d=serialize\" INSTEAD", hw);
1577                                 goto do_serialize;
1578                         case -6: /* "autotune" */
1579                                 drive->autotune = IDE_TUNE_AUTO;
1580                                 goto obsolete_option;
1581                         case -7: /* "noautotune" */
1582                                 drive->autotune = IDE_TUNE_NOAUTO;
1583                                 goto obsolete_option;
1584                         case -9: /* "swapdata" */
1585                         case -10: /* "bswap" */
1586                                 drive->bswap = 1;
1587                                 goto done;
1588                         case -12: /* "remap" */
1589                                 drive->remap_0_to_1 = 1;
1590                                 goto done;
1591                         case -13: /* "remap63" */
1592                                 drive->sect0 = 63;
1593                                 goto done;
1594                         case -14: /* "scsi" */
1595                                 drive->scsi = 1;
1596                                 goto done;
1597                         case 3: /* cyl,head,sect */
1598                                 drive->media    = ide_disk;
1599                                 drive->ready_stat = READY_STAT;
1600                                 drive->cyl      = drive->bios_cyl  = vals[0];
1601                                 drive->head     = drive->bios_head = vals[1];
1602                                 drive->sect     = drive->bios_sect = vals[2];
1603                                 drive->present  = 1;
1604                                 drive->forced_geom = 1;
1605                                 hwif->noprobe = 0;
1606                                 goto done;
1607                         default:
1608                                 goto bad_option;
1609                 }
1610         }
1611
1612         if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1613                 goto bad_option;
1614         /*
1615          * Look for bus speed option:  "idebus="
1616          */
1617         if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1618                 if (match_parm(&s[6], NULL, vals, 1) != 1)
1619                         goto bad_option;
1620                 if (vals[0] >= 20 && vals[0] <= 66) {
1621                         idebus_parameter = vals[0];
1622                 } else
1623                         printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1624                 goto done;
1625         }
1626         /*
1627          * Look for interface options:  "idex="
1628          */
1629         if (s[3] >= '0' && s[3] <= max_hwif) {
1630                 /*
1631                  * Be VERY CAREFUL changing this: note hardcoded indexes below
1632                  * (-8, -9, -10) are reserved to ease the hardcoding.
1633                  */
1634                 static const char *ide_words[] = {
1635                         "noprobe", "serialize", "autotune", "noautotune",
1636                         "reset", "dma", "ata66", "minus8", "minus9",
1637                         "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1638                         "dtc2278", "umc8672", "ali14xx", NULL };
1639                 hw = s[3] - '0';
1640                 hwif = &ide_hwifs[hw];
1641                 i = match_parm(&s[4], ide_words, vals, 3);
1642
1643                 /*
1644                  * Cryptic check to ensure chipset not already set for hwif.
1645                  * Note: we can't depend on hwif->chipset here.
1646                  */
1647                 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1648                         /* chipset already specified */
1649                         if (is_chipset_set[hw])
1650                                 goto bad_option;
1651                         if (i > -18 && i <= -11) {
1652                                 /* these drivers are for "ide0=" only */
1653                                 if (hw != 0)
1654                                         goto bad_hwif;
1655                                 /* chipset already specified for 2nd port */
1656                                 if (is_chipset_set[hw+1])
1657                                         goto bad_option;
1658                         }
1659                         is_chipset_set[hw] = 1;
1660                         printk("\n");
1661                 }
1662
1663                 switch (i) {
1664 #ifdef CONFIG_BLK_DEV_ALI14XX
1665                         case -17: /* "ali14xx" */
1666                                 probe_ali14xx = 1;
1667                                 goto done;
1668 #endif
1669 #ifdef CONFIG_BLK_DEV_UMC8672
1670                         case -16: /* "umc8672" */
1671                                 probe_umc8672 = 1;
1672                                 goto done;
1673 #endif
1674 #ifdef CONFIG_BLK_DEV_DTC2278
1675                         case -15: /* "dtc2278" */
1676                                 probe_dtc2278 = 1;
1677                                 goto done;
1678 #endif
1679 #ifdef CONFIG_BLK_DEV_CMD640
1680                         case -14: /* "cmd640_vlb" */
1681                         {
1682                                 extern int cmd640_vlb; /* flag for cmd640.c */
1683                                 cmd640_vlb = 1;
1684                                 goto done;
1685                         }
1686 #endif
1687 #ifdef CONFIG_BLK_DEV_HT6560B
1688                         case -13: /* "ht6560b" */
1689                                 probe_ht6560b = 1;
1690                                 goto done;
1691 #endif
1692 #ifdef CONFIG_BLK_DEV_QD65XX
1693                         case -12: /* "qd65xx" */
1694                                 probe_qd65xx = 1;
1695                                 goto done;
1696 #endif
1697 #ifdef CONFIG_BLK_DEV_4DRIVES
1698                         case -11: /* "four" drives on one set of ports */
1699                         {
1700                                 ide_hwif_t *mate = &ide_hwifs[hw^1];
1701                                 mate->drives[0].select.all ^= 0x20;
1702                                 mate->drives[1].select.all ^= 0x20;
1703                                 hwif->chipset = mate->chipset = ide_4drives;
1704                                 mate->irq = hwif->irq;
1705                                 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1706                                 goto do_serialize;
1707                         }
1708 #endif /* CONFIG_BLK_DEV_4DRIVES */
1709                         case -10: /* minus10 */
1710                         case -9: /* minus9 */
1711                         case -8: /* minus8 */
1712                                 goto bad_option;
1713                         case -7: /* ata66 */
1714 #ifdef CONFIG_BLK_DEV_IDEPCI
1715                                 hwif->udma_four = 1;
1716                                 goto obsolete_option;
1717 #else
1718                                 goto bad_hwif;
1719 #endif
1720                         case -6: /* dma */
1721                                 hwif->autodma = 1;
1722                                 goto obsolete_option;
1723                         case -5: /* "reset" */
1724                                 hwif->reset = 1;
1725                                 goto obsolete_option;
1726                         case -4: /* "noautotune" */
1727                                 hwif->drives[0].autotune = IDE_TUNE_NOAUTO;
1728                                 hwif->drives[1].autotune = IDE_TUNE_NOAUTO;
1729                                 goto obsolete_option;
1730                         case -3: /* "autotune" */
1731                                 hwif->drives[0].autotune = IDE_TUNE_AUTO;
1732                                 hwif->drives[1].autotune = IDE_TUNE_AUTO;
1733                                 goto obsolete_option;
1734                         case -2: /* "serialize" */
1735                         do_serialize:
1736                                 hwif->mate = &ide_hwifs[hw^1];
1737                                 hwif->mate->mate = hwif;
1738                                 hwif->serialized = hwif->mate->serialized = 1;
1739                                 goto obsolete_option;
1740
1741                         case -1: /* "noprobe" */
1742                                 hwif->noprobe = 1;
1743                                 goto done;
1744
1745                         case 1: /* base */
1746                                 vals[1] = vals[0] + 0x206; /* default ctl */
1747                         case 2: /* base,ctl */
1748                                 vals[2] = 0;    /* default irq = probe for it */
1749                         case 3: /* base,ctl,irq */
1750                                 hwif->hw.irq = vals[2];
1751                                 ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq);
1752                                 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
1753                                 hwif->irq      = vals[2];
1754                                 hwif->noprobe  = 0;
1755                                 hwif->chipset  = ide_forced;
1756                                 goto obsolete_option;
1757
1758                         case 0: goto bad_option;
1759                         default:
1760                                 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1761                                 return 1;
1762                 }
1763         }
1764 bad_option:
1765         printk(" -- BAD OPTION\n");
1766         return 1;
1767 obsolete_option:
1768         printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1769         return 1;
1770 bad_hwif:
1771         printk("-- NOT SUPPORTED ON ide%d", hw);
1772 done:
1773         printk("\n");
1774         return 1;
1775 }
1776
1777 extern void pnpide_init(void);
1778 extern void h8300_ide_init(void);
1779
1780 /*
1781  * probe_for_hwifs() finds/initializes "known" IDE interfaces
1782  */
1783 static void __init probe_for_hwifs (void)
1784 {
1785 #ifdef CONFIG_BLK_DEV_IDEPCI
1786         ide_scan_pcibus(ide_scan_direction);
1787 #endif /* CONFIG_BLK_DEV_IDEPCI */
1788
1789 #ifdef CONFIG_ETRAX_IDE
1790         {
1791                 extern void init_e100_ide(void);
1792                 init_e100_ide();
1793         }
1794 #endif /* CONFIG_ETRAX_IDE */
1795 #ifdef CONFIG_BLK_DEV_CMD640
1796         {
1797                 extern void ide_probe_for_cmd640x(void);
1798                 ide_probe_for_cmd640x();
1799         }
1800 #endif /* CONFIG_BLK_DEV_CMD640 */
1801 #ifdef CONFIG_BLK_DEV_IDE_PMAC
1802         {
1803                 extern void pmac_ide_probe(void);
1804                 pmac_ide_probe();
1805         }
1806 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
1807 #ifdef CONFIG_BLK_DEV_GAYLE
1808         {
1809                 extern void gayle_init(void);
1810                 gayle_init();
1811         }
1812 #endif /* CONFIG_BLK_DEV_GAYLE */
1813 #ifdef CONFIG_BLK_DEV_FALCON_IDE
1814         {
1815                 extern void falconide_init(void);
1816                 falconide_init();
1817         }
1818 #endif /* CONFIG_BLK_DEV_FALCON_IDE */
1819 #ifdef CONFIG_BLK_DEV_MAC_IDE
1820         {
1821                 extern void macide_init(void);
1822                 macide_init();
1823         }
1824 #endif /* CONFIG_BLK_DEV_MAC_IDE */
1825 #ifdef CONFIG_BLK_DEV_Q40IDE
1826         {
1827                 extern void q40ide_init(void);
1828                 q40ide_init();
1829         }
1830 #endif /* CONFIG_BLK_DEV_Q40IDE */
1831 #ifdef CONFIG_BLK_DEV_BUDDHA
1832         {
1833                 extern void buddha_init(void);
1834                 buddha_init();
1835         }
1836 #endif /* CONFIG_BLK_DEV_BUDDHA */
1837 #ifdef CONFIG_BLK_DEV_IDEPNP
1838         pnpide_init();
1839 #endif
1840 #ifdef CONFIG_H8300
1841         h8300_ide_init();
1842 #endif
1843 }
1844
1845 void ide_register_subdriver(ide_drive_t *drive, ide_driver_t *driver)
1846 {
1847 #ifdef CONFIG_PROC_FS
1848         ide_add_proc_entries(drive->proc, driver->proc, drive);
1849 #endif
1850 }
1851
1852 EXPORT_SYMBOL(ide_register_subdriver);
1853
1854 /**
1855  *      ide_unregister_subdriver        -       disconnect drive from driver
1856  *      @drive: drive to unplug
1857  *      @driver: driver
1858  *
1859  *      Disconnect a drive from the driver it was attached to and then
1860  *      clean up the various proc files and other objects attached to it.
1861  *
1862  *      Takes ide_setting_sem and ide_lock.
1863  *      Caller must hold none of the locks.
1864  */
1865
1866 void ide_unregister_subdriver(ide_drive_t *drive, ide_driver_t *driver)
1867 {
1868         unsigned long flags;
1869
1870         down(&ide_setting_sem);
1871         spin_lock_irqsave(&ide_lock, flags);
1872 #ifdef CONFIG_PROC_FS
1873         ide_remove_proc_entries(drive->proc, driver->proc);
1874 #endif
1875         auto_remove_settings(drive);
1876         spin_unlock_irqrestore(&ide_lock, flags);
1877         up(&ide_setting_sem);
1878 }
1879
1880 EXPORT_SYMBOL(ide_unregister_subdriver);
1881
1882 /*
1883  * Probe module
1884  */
1885
1886 EXPORT_SYMBOL(ide_lock);
1887
1888 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1889 {
1890         return 1;
1891 }
1892
1893 static char *media_string(ide_drive_t *drive)
1894 {
1895         switch (drive->media) {
1896         case ide_disk:
1897                 return "disk";
1898         case ide_cdrom:
1899                 return "cdrom";
1900         case ide_tape:
1901                 return "tape";
1902         case ide_floppy:
1903                 return "floppy";
1904         default:
1905                 return "UNKNOWN";
1906         }
1907 }
1908
1909 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1910 {
1911         ide_drive_t *drive = to_ide_device(dev);
1912         return sprintf(buf, "%s\n", media_string(drive));
1913 }
1914
1915 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1916 {
1917         ide_drive_t *drive = to_ide_device(dev);
1918         return sprintf(buf, "%s\n", drive->name);
1919 }
1920
1921 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1922 {
1923         ide_drive_t *drive = to_ide_device(dev);
1924         return sprintf(buf, "ide:m-%s\n", media_string(drive));
1925 }
1926
1927 static struct device_attribute ide_dev_attrs[] = {
1928         __ATTR_RO(media),
1929         __ATTR_RO(drivename),
1930         __ATTR_RO(modalias),
1931         __ATTR_NULL
1932 };
1933
1934 static int ide_uevent(struct device *dev, char **envp, int num_envp,
1935                       char *buffer, int buffer_size)
1936 {
1937         ide_drive_t *drive = to_ide_device(dev);
1938         int i = 0;
1939         int length = 0;
1940
1941         add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1942                        "MEDIA=%s", media_string(drive));
1943         add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1944                        "DRIVENAME=%s", drive->name);
1945         add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1946                        "MODALIAS=ide:m-%s", media_string(drive));
1947         envp[i] = NULL;
1948         return 0;
1949 }
1950
1951 static int generic_ide_probe(struct device *dev)
1952 {
1953         ide_drive_t *drive = to_ide_device(dev);
1954         ide_driver_t *drv = to_ide_driver(dev->driver);
1955
1956         return drv->probe ? drv->probe(drive) : -ENODEV;
1957 }
1958
1959 static int generic_ide_remove(struct device *dev)
1960 {
1961         ide_drive_t *drive = to_ide_device(dev);
1962         ide_driver_t *drv = to_ide_driver(dev->driver);
1963
1964         if (drv->remove)
1965                 drv->remove(drive);
1966
1967         return 0;
1968 }
1969
1970 static void generic_ide_shutdown(struct device *dev)
1971 {
1972         ide_drive_t *drive = to_ide_device(dev);
1973         ide_driver_t *drv = to_ide_driver(dev->driver);
1974
1975         if (dev->driver && drv->shutdown)
1976                 drv->shutdown(drive);
1977 }
1978
1979 struct bus_type ide_bus_type = {
1980         .name           = "ide",
1981         .match          = ide_bus_match,
1982         .uevent         = ide_uevent,
1983         .probe          = generic_ide_probe,
1984         .remove         = generic_ide_remove,
1985         .shutdown       = generic_ide_shutdown,
1986         .dev_attrs      = ide_dev_attrs,
1987         .suspend        = generic_ide_suspend,
1988         .resume         = generic_ide_resume,
1989 };
1990
1991 EXPORT_SYMBOL_GPL(ide_bus_type);
1992
1993 /*
1994  * This is gets invoked once during initialization, to set *everything* up
1995  */
1996 static int __init ide_init(void)
1997 {
1998         printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
1999         devfs_mk_dir("ide");
2000         system_bus_speed = ide_system_bus_speed();
2001
2002         bus_register(&ide_bus_type);
2003
2004         init_ide_data();
2005
2006 #ifdef CONFIG_PROC_FS
2007         proc_ide_root = proc_mkdir("ide", NULL);
2008 #endif
2009
2010 #ifdef CONFIG_BLK_DEV_ALI14XX
2011         if (probe_ali14xx)
2012                 (void)ali14xx_init();
2013 #endif
2014 #ifdef CONFIG_BLK_DEV_UMC8672
2015         if (probe_umc8672)
2016                 (void)umc8672_init();
2017 #endif
2018 #ifdef CONFIG_BLK_DEV_DTC2278
2019         if (probe_dtc2278)
2020                 (void)dtc2278_init();
2021 #endif
2022 #ifdef CONFIG_BLK_DEV_HT6560B
2023         if (probe_ht6560b)
2024                 (void)ht6560b_init();
2025 #endif
2026 #ifdef CONFIG_BLK_DEV_QD65XX
2027         if (probe_qd65xx)
2028                 (void)qd65xx_init();
2029 #endif
2030
2031         initializing = 1;
2032         /* Probe for special PCI and other "known" interface chipsets. */
2033         probe_for_hwifs();
2034         initializing = 0;
2035
2036 #ifdef CONFIG_PROC_FS
2037         proc_ide_create();
2038 #endif
2039         return 0;
2040 }
2041
2042 #ifdef MODULE
2043 static char *options = NULL;
2044 module_param(options, charp, 0);
2045 MODULE_LICENSE("GPL");
2046
2047 static void __init parse_options (char *line)
2048 {
2049         char *next = line;
2050
2051         if (line == NULL || !*line)
2052                 return;
2053         while ((line = next) != NULL) {
2054                 if ((next = strchr(line,' ')) != NULL)
2055                         *next++ = 0;
2056                 if (!ide_setup(line))
2057                         printk (KERN_INFO "Unknown option '%s'\n", line);
2058         }
2059 }
2060
2061 int __init init_module (void)
2062 {
2063         parse_options(options);
2064         return ide_init();
2065 }
2066
2067 void cleanup_module (void)
2068 {
2069         int index;
2070
2071         for (index = 0; index < MAX_HWIFS; ++index)
2072                 ide_unregister(index);
2073
2074 #ifdef CONFIG_PROC_FS
2075         proc_ide_destroy();
2076 #endif
2077         devfs_remove("ide");
2078
2079         bus_unregister(&ide_bus_type);
2080 }
2081
2082 #else /* !MODULE */
2083
2084 __setup("", ide_setup);
2085
2086 module_init(ide_init);
2087
2088 #endif /* MODULE */