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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 #define _IDE_C                  /* Tell ide.h it's really us */
 130
 131 #include <linux/module.h>
 132 #include <linux/types.h>
 133 #include <linux/string.h>
 134 #include <linux/kernel.h>
 135 #include <linux/timer.h>
 136 #include <linux/mm.h>
 137 #include <linux/interrupt.h>
 138 #include <linux/major.h>
 139 #include <linux/errno.h>
 140 #include <linux/genhd.h>
 141 #include <linux/blkpg.h>
 142 #include <linux/slab.h>
 143 #include <linux/init.h>
 144 #include <linux/pci.h>
 145 #include <linux/delay.h>
 146 #include <linux/ide.h>
 147 #include <linux/completion.h>
 148 #include <linux/reboot.h>
 149 #include <linux/cdrom.h>
 150 #include <linux/seq_file.h>
 151 #include <linux/device.h>
 152 #include <linux/bitops.h>
 153
 154 #include <asm/byteorder.h>
 155 #include <asm/irq.h>
 156 #include <asm/uaccess.h>
 157 #include <asm/io.h>
 158
 159
 160 /* default maximum number of failures */
 161 #define IDE_DEFAULT_MAX_FAILURES        1
 162
 163 static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
 164                                         IDE2_MAJOR, IDE3_MAJOR,
 165                                         IDE4_MAJOR, IDE5_MAJOR,
 166                                         IDE6_MAJOR, IDE7_MAJOR,
 167                                         IDE8_MAJOR, IDE9_MAJOR };
 168
 169 static int idebus_parameter;    /* holds the "idebus=" parameter */
 170 static int system_bus_speed;    /* holds what we think is VESA/PCI bus speed */
 171 static int initializing;        /* set while initializing built-in drivers */
 172
 173 DECLARE_MUTEX(ide_cfg_sem);
 174  __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
 175
 176 #ifdef CONFIG_BLK_DEV_IDEPCI
 177 static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
 178 #endif
 179
 180 int noautodma = 0;
 181
 182 EXPORT_SYMBOL(noautodma);
 183
 184 #ifdef CONFIG_BLK_DEV_IDEACPI
 185 int ide_noacpi = 0;
 186 int ide_noacpitfs = 1;
 187 int ide_noacpionboot = 1;
 188 #endif
 189
 190 /*
 191  * This is declared extern in ide.h, for access by other IDE modules:
 192  */
 193 ide_hwif_t ide_hwifs[MAX_HWIFS];        /* master data repository */
 194
 195 EXPORT_SYMBOL(ide_hwifs);
 196
 197 /*
 198  * Do not even *think* about calling this!
 199  */
 200 static void init_hwif_data(ide_hwif_t *hwif, unsigned int index)
 201 {
 202         unsigned int unit;
 203
 204         /* bulk initialize hwif & drive info with zeros */
 205         memset(hwif, 0, sizeof(ide_hwif_t));
 206
 207         /* fill in any non-zero initial values */
 208         hwif->index     = index;
 209         hwif->major     = ide_hwif_to_major[index];
 210
 211         hwif->name[0]   = 'i';
 212         hwif->name[1]   = 'd';
 213         hwif->name[2]   = 'e';
 214         hwif->name[3]   = '0' + index;
 215
 216         hwif->bus_state = BUSSTATE_ON;
 217
 218         hwif->atapi_dma = 0;            /* disable all atapi dma */
 219         hwif->ultra_mask = 0x80;        /* disable all ultra */
 220         hwif->mwdma_mask = 0x80;        /* disable all mwdma */
 221         hwif->swdma_mask = 0x80;        /* disable all swdma */
 222
 223         init_completion(&hwif->gendev_rel_comp);
 224
 225         default_hwif_iops(hwif);
 226         default_hwif_transport(hwif);
 227         for (unit = 0; unit < MAX_DRIVES; ++unit) {
 228                 ide_drive_t *drive = &hwif->drives[unit];
 229
 230                 drive->media                    = ide_disk;
 231                 drive->select.all               = (unit<<4)|0xa0;
 232                 drive->hwif                     = hwif;
 233                 drive->ctl                      = 0x08;
 234                 drive->ready_stat               = READY_STAT;
 235                 drive->bad_wstat                = BAD_W_STAT;
 236                 drive->special.b.recalibrate    = 1;
 237                 drive->special.b.set_geometry   = 1;
 238                 drive->name[0]                  = 'h';
 239                 drive->name[1]                  = 'd';
 240                 drive->name[2]                  = 'a' + (index * MAX_DRIVES) + unit;
 241                 drive->max_failures             = IDE_DEFAULT_MAX_FAILURES;
 242                 drive->using_dma                = 0;
 243                 drive->vdma                     = 0;
 244                 INIT_LIST_HEAD(&drive->list);
 245                 init_completion(&drive->gendev_rel_comp);
 246         }
 247 }
 248
 249 static void init_hwif_default(ide_hwif_t *hwif, unsigned int index)
 250 {
 251         hw_regs_t hw;
 252
 253         memset(&hw, 0, sizeof(hw_regs_t));
 254
 255         ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq);
 256
 257         memcpy(&hwif->hw, &hw, sizeof(hw));
 258         memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
 259
 260         hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
 261 #ifdef CONFIG_BLK_DEV_HD
 262         if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA)
 263                 hwif->noprobe = 1;      /* may be overridden by ide_setup() */
 264 #endif
 265 }
 266
 267 extern void ide_arm_init(void);
 268
 269 /*
 270  * init_ide_data() sets reasonable default values into all fields
 271  * of all instances of the hwifs and drives, but only on the first call.
 272  * Subsequent calls have no effect (they don't wipe out anything).
 273  *
 274  * This routine is normally called at driver initialization time,
 275  * but may also be called MUCH earlier during kernel "command-line"
 276  * parameter processing.  As such, we cannot depend on any other parts
 277  * of the kernel (such as memory allocation) to be functioning yet.
 278  *
 279  * This is too bad, as otherwise we could dynamically allocate the
 280  * ide_drive_t structs as needed, rather than always consuming memory
 281  * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
 282  *
 283  * FIXME: We should stuff the setup data into __init and copy the
 284  * relevant hwifs/allocate them properly during boot.
 285  */
 286 #define MAGIC_COOKIE 0x12345678
 287 static void __init init_ide_data (void)
 288 {
 289         ide_hwif_t *hwif;
 290         unsigned int index;
 291         static unsigned long magic_cookie = MAGIC_COOKIE;
 292
 293         if (magic_cookie != MAGIC_COOKIE)
 294                 return;         /* already initialized */
 295         magic_cookie = 0;
 296
 297         /* Initialise all interface structures */
 298         for (index = 0; index < MAX_HWIFS; ++index) {
 299                 hwif = &ide_hwifs[index];
 300                 init_hwif_data(hwif, index);
 301                 init_hwif_default(hwif, index);
 302 #if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
 303                 hwif->irq = hwif->hw.irq =
 304                         ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
 305 #endif
 306         }
 307 #ifdef CONFIG_IDE_ARM
 308         initializing = 1;
 309         ide_arm_init();
 310         initializing = 0;
 311 #endif
 312 }
 313
 314 /**
 315  *      ide_system_bus_speed    -       guess bus speed
 316  *
 317  *      ide_system_bus_speed() returns what we think is the system VESA/PCI
 318  *      bus speed (in MHz). This is used for calculating interface PIO timings.
 319  *      The default is 40 for known PCI systems, 50 otherwise.
 320  *      The "idebus=xx" parameter can be used to override this value.
 321  *      The actual value to be used is computed/displayed the first time
 322  *      through. Drivers should only use this as a last resort.
 323  *
 324  *      Returns a guessed speed in MHz.
 325  */
 326
 327 static int ide_system_bus_speed(void)
 328 {
 329 #ifdef CONFIG_PCI
 330         static struct pci_device_id pci_default[] = {
 331                 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
 332                 { }
 333         };
 334 #else
 335 #define pci_default 0
 336 #endif /* CONFIG_PCI */
 337
 338         if (!system_bus_speed) {
 339                 if (idebus_parameter) {
 340                         /* user supplied value */
 341                         system_bus_speed = idebus_parameter;
 342                 } else if (pci_dev_present(pci_default)) {
 343                         /* safe default value for PCI */
 344                         system_bus_speed = 33;
 345                 } else {
 346                         /* safe default value for VESA and PCI */
 347                         system_bus_speed = 50;
 348                 }
 349                 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
 350                         "for PIO modes%s\n", system_bus_speed,
 351                         idebus_parameter ? "" : "; override with idebus=xx");
 352         }
 353         return system_bus_speed;
 354 }
 355
 356 #ifdef CONFIG_PROC_FS
 357 struct proc_dir_entry *proc_ide_root;
 358 #endif
 359
 360 static struct resource* hwif_request_region(ide_hwif_t *hwif,
 361                                             unsigned long addr, int num)
 362 {
 363         struct resource *res = request_region(addr, num, hwif->name);
 364
 365         if (!res)
 366                 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
 367                                 hwif->name, addr, addr+num-1);
 368         return res;
 369 }
 370
 371 /**
 372  *      ide_hwif_request_regions - request resources for IDE
 373  *      @hwif: interface to use
 374  *
 375  *      Requests all the needed resources for an interface.
 376  *      Right now core IDE code does this work which is deeply wrong.
 377  *      MMIO leaves it to the controller driver,
 378  *      PIO will migrate this way over time.
 379  */
 380
 381 int ide_hwif_request_regions(ide_hwif_t *hwif)
 382 {
 383         unsigned long addr;
 384         unsigned int i;
 385
 386         if (hwif->mmio)
 387                 return 0;
 388         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
 389         if (addr && !hwif_request_region(hwif, addr, 1))
 390                 goto control_region_busy;
 391         hwif->straight8 = 0;
 392         addr = hwif->io_ports[IDE_DATA_OFFSET];
 393         if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
 394                 if (!hwif_request_region(hwif, addr, 8))
 395                         goto data_region_busy;
 396                 hwif->straight8 = 1;
 397                 return 0;
 398         }
 399         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
 400                 addr = hwif->io_ports[i];
 401                 if (!hwif_request_region(hwif, addr, 1)) {
 402                         while (--i)
 403                                 release_region(addr, 1);
 404                         goto data_region_busy;
 405                 }
 406         }
 407         return 0;
 408
 409 data_region_busy:
 410         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
 411         if (addr)
 412                 release_region(addr, 1);
 413 control_region_busy:
 414         /* If any errors are return, we drop the hwif interface. */
 415         return -EBUSY;
 416 }
 417
 418 /**
 419  *      ide_hwif_release_regions - free IDE resources
 420  *
 421  *      Note that we only release the standard ports,
 422  *      and do not even try to handle any extra ports
 423  *      allocated for weird IDE interface chipsets.
 424  *
 425  *      Note also that we don't yet handle mmio resources here. More
 426  *      importantly our caller should be doing this so we need to
 427  *      restructure this as a helper function for drivers.
 428  */
 429
 430 void ide_hwif_release_regions(ide_hwif_t *hwif)
 431 {
 432         u32 i = 0;
 433
 434         if (hwif->mmio)
 435                 return;
 436         if (hwif->io_ports[IDE_CONTROL_OFFSET])
 437                 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
 438         if (hwif->straight8) {
 439                 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
 440                 return;
 441         }
 442         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
 443                 if (hwif->io_ports[i])
 444                         release_region(hwif->io_ports[i], 1);
 445 }
 446
 447 /**
 448  *      ide_hwif_restore        -       restore hwif to template
 449  *      @hwif: hwif to update
 450  *      @tmp_hwif: template
 451  *
 452  *      Restore hwif to a previous state by copying most settings
 453  *      from the template.
 454  */
 455
 456 static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
 457 {
 458         hwif->hwgroup                   = tmp_hwif->hwgroup;
 459
 460         hwif->gendev.parent             = tmp_hwif->gendev.parent;
 461
 462         hwif->proc                      = tmp_hwif->proc;
 463
 464         hwif->major                     = tmp_hwif->major;
 465         hwif->straight8                 = tmp_hwif->straight8;
 466         hwif->bus_state                 = tmp_hwif->bus_state;
 467
 468         hwif->atapi_dma                 = tmp_hwif->atapi_dma;
 469         hwif->ultra_mask                = tmp_hwif->ultra_mask;
 470         hwif->mwdma_mask                = tmp_hwif->mwdma_mask;
 471         hwif->swdma_mask                = tmp_hwif->swdma_mask;
 472
 473         hwif->chipset                   = tmp_hwif->chipset;
 474         hwif->hold                      = tmp_hwif->hold;
 475
 476 #ifdef CONFIG_BLK_DEV_IDEPCI
 477         hwif->pci_dev                   = tmp_hwif->pci_dev;
 478         hwif->cds                       = tmp_hwif->cds;
 479 #endif
 480
 481         hwif->tuneproc                  = tmp_hwif->tuneproc;
 482         hwif->speedproc                 = tmp_hwif->speedproc;
 483         hwif->selectproc                = tmp_hwif->selectproc;
 484         hwif->reset_poll                = tmp_hwif->reset_poll;
 485         hwif->pre_reset                 = tmp_hwif->pre_reset;
 486         hwif->resetproc                 = tmp_hwif->resetproc;
 487         hwif->intrproc                  = tmp_hwif->intrproc;
 488         hwif->maskproc                  = tmp_hwif->maskproc;
 489         hwif->quirkproc                 = tmp_hwif->quirkproc;
 490         hwif->busproc                   = tmp_hwif->busproc;
 491
 492         hwif->ata_input_data            = tmp_hwif->ata_input_data;
 493         hwif->ata_output_data           = tmp_hwif->ata_output_data;
 494         hwif->atapi_input_bytes         = tmp_hwif->atapi_input_bytes;
 495         hwif->atapi_output_bytes        = tmp_hwif->atapi_output_bytes;
 496
 497         hwif->dma_setup                 = tmp_hwif->dma_setup;
 498         hwif->dma_exec_cmd              = tmp_hwif->dma_exec_cmd;
 499         hwif->dma_start                 = tmp_hwif->dma_start;
 500         hwif->ide_dma_end               = tmp_hwif->ide_dma_end;
 501         hwif->ide_dma_check             = tmp_hwif->ide_dma_check;
 502         hwif->ide_dma_on                = tmp_hwif->ide_dma_on;
 503         hwif->dma_off_quietly           = tmp_hwif->dma_off_quietly;
 504         hwif->ide_dma_test_irq          = tmp_hwif->ide_dma_test_irq;
 505         hwif->ide_dma_clear_irq         = tmp_hwif->ide_dma_clear_irq;
 506         hwif->dma_host_on               = tmp_hwif->dma_host_on;
 507         hwif->dma_host_off              = tmp_hwif->dma_host_off;
 508         hwif->ide_dma_lostirq           = tmp_hwif->ide_dma_lostirq;
 509         hwif->ide_dma_timeout           = tmp_hwif->ide_dma_timeout;
 510
 511         hwif->OUTB                      = tmp_hwif->OUTB;
 512         hwif->OUTBSYNC                  = tmp_hwif->OUTBSYNC;
 513         hwif->OUTW                      = tmp_hwif->OUTW;
 514         hwif->OUTSW                     = tmp_hwif->OUTSW;
 515         hwif->OUTSL                     = tmp_hwif->OUTSL;
 516
 517         hwif->INB                       = tmp_hwif->INB;
 518         hwif->INW                       = tmp_hwif->INW;
 519         hwif->INSW                      = tmp_hwif->INSW;
 520         hwif->INSL                      = tmp_hwif->INSL;
 521
 522         hwif->sg_max_nents              = tmp_hwif->sg_max_nents;
 523
 524         hwif->mmio                      = tmp_hwif->mmio;
 525         hwif->rqsize                    = tmp_hwif->rqsize;
 526         hwif->no_lba48                  = tmp_hwif->no_lba48;
 527
 528 #ifndef CONFIG_BLK_DEV_IDECS
 529         hwif->irq                       = tmp_hwif->irq;
 530 #endif
 531
 532         hwif->dma_base                  = tmp_hwif->dma_base;
 533         hwif->dma_master                = tmp_hwif->dma_master;
 534         hwif->dma_command               = tmp_hwif->dma_command;
 535         hwif->dma_vendor1               = tmp_hwif->dma_vendor1;
 536         hwif->dma_status                = tmp_hwif->dma_status;
 537         hwif->dma_vendor3               = tmp_hwif->dma_vendor3;
 538         hwif->dma_prdtable              = tmp_hwif->dma_prdtable;
 539
 540         hwif->config_data               = tmp_hwif->config_data;
 541         hwif->select_data               = tmp_hwif->select_data;
 542         hwif->extra_base                = tmp_hwif->extra_base;
 543         hwif->extra_ports               = tmp_hwif->extra_ports;
 544         hwif->autodma                   = tmp_hwif->autodma;
 545         hwif->udma_four                 = tmp_hwif->udma_four;
 546
 547         hwif->hwif_data                 = tmp_hwif->hwif_data;
 548 }
 549
 550 /**
 551  *      ide_unregister          -       free an IDE interface
 552  *      @index: index of interface (will change soon to a pointer)
 553  *
 554  *      Perform the final unregister of an IDE interface. At the moment
 555  *      we don't refcount interfaces so this will also get split up.
 556  *
 557  *      Locking:
 558  *      The caller must not hold the IDE locks
 559  *      The drive present/vanishing is not yet properly locked
 560  *      Take care with the callbacks. These have been split to avoid
 561  *      deadlocking the IDE layer. The shutdown callback is called
 562  *      before we take the lock and free resources. It is up to the
 563  *      caller to be sure there is no pending I/O here, and that
 564  *      the interface will not be reopened (present/vanishing locking
 565  *      isn't yet done BTW). After we commit to the final kill we
 566  *      call the cleanup callback with the ide locks held.
 567  *
 568  *      Unregister restores the hwif structures to the default state.
 569  *      This is raving bonkers.
 570  */
 571
 572 void ide_unregister(unsigned int index)
 573 {
 574         ide_drive_t *drive;
 575         ide_hwif_t *hwif, *g;
 576         static ide_hwif_t tmp_hwif; /* protected by ide_cfg_sem */
 577         ide_hwgroup_t *hwgroup;
 578         int irq_count = 0, unit;
 579
 580         BUG_ON(index >= MAX_HWIFS);
 581
 582         BUG_ON(in_interrupt());
 583         BUG_ON(irqs_disabled());
 584         down(&ide_cfg_sem);
 585         spin_lock_irq(&ide_lock);
 586         hwif = &ide_hwifs[index];
 587         if (!hwif->present)
 588                 goto abort;
 589         for (unit = 0; unit < MAX_DRIVES; ++unit) {
 590                 drive = &hwif->drives[unit];
 591                 if (!drive->present)
 592                         continue;
 593                 spin_unlock_irq(&ide_lock);
 594                 device_unregister(&drive->gendev);
 595                 wait_for_completion(&drive->gendev_rel_comp);
 596                 spin_lock_irq(&ide_lock);
 597         }
 598         hwif->present = 0;
 599
 600         spin_unlock_irq(&ide_lock);
 601
 602         destroy_proc_ide_interface(hwif);
 603
 604         hwgroup = hwif->hwgroup;
 605         /*
 606          * free the irq if we were the only hwif using it
 607          */
 608         g = hwgroup->hwif;
 609         do {
 610                 if (g->irq == hwif->irq)
 611                         ++irq_count;
 612                 g = g->next;
 613         } while (g != hwgroup->hwif);
 614         if (irq_count == 1)
 615                 free_irq(hwif->irq, hwgroup);
 616
 617         spin_lock_irq(&ide_lock);
 618         /*
 619          * Note that we only release the standard ports,
 620          * and do not even try to handle any extra ports
 621          * allocated for weird IDE interface chipsets.
 622          */
 623         ide_hwif_release_regions(hwif);
 624
 625         /*
 626          * Remove us from the hwgroup, and free
 627          * the hwgroup if we were the only member
 628          */
 629         if (hwif->next == hwif) {
 630                 BUG_ON(hwgroup->hwif != hwif);
 631                 kfree(hwgroup);
 632         } else {
 633                 /* There is another interface in hwgroup.
 634                  * Unlink us, and set hwgroup->drive and ->hwif to
 635                  * something sane.
 636                  */
 637                 g = hwgroup->hwif;
 638                 while (g->next != hwif)
 639                         g = g->next;
 640                 g->next = hwif->next;
 641                 if (hwgroup->hwif == hwif) {
 642                         /* Chose a random hwif for hwgroup->hwif.
 643                          * It's guaranteed that there are no drives
 644                          * left in the hwgroup.
 645                          */
 646                         BUG_ON(hwgroup->drive != NULL);
 647                         hwgroup->hwif = g;
 648                 }
 649                 BUG_ON(hwgroup->hwif == hwif);
 650         }
 651
 652         /* More messed up locking ... */
 653         spin_unlock_irq(&ide_lock);
 654         device_unregister(&hwif->gendev);
 655         wait_for_completion(&hwif->gendev_rel_comp);
 656
 657         /*
 658          * Remove us from the kernel's knowledge
 659          */
 660         blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
 661         kfree(hwif->sg_table);
 662         unregister_blkdev(hwif->major, hwif->name);
 663         spin_lock_irq(&ide_lock);
 664
 665         if (hwif->dma_base) {
 666                 (void) ide_release_dma(hwif);
 667
 668                 hwif->dma_base = 0;
 669                 hwif->dma_master = 0;
 670                 hwif->dma_command = 0;
 671                 hwif->dma_vendor1 = 0;
 672                 hwif->dma_status = 0;
 673                 hwif->dma_vendor3 = 0;
 674                 hwif->dma_prdtable = 0;
 675
 676                 hwif->extra_base  = 0;
 677                 hwif->extra_ports = 0;
 678         }
 679
 680         /* copy original settings */
 681         tmp_hwif = *hwif;
 682
 683         /* restore hwif data to pristine status */
 684         init_hwif_data(hwif, index);
 685         init_hwif_default(hwif, index);
 686
 687         ide_hwif_restore(hwif, &tmp_hwif);
 688
 689 abort:
 690         spin_unlock_irq(&ide_lock);
 691         up(&ide_cfg_sem);
 692 }
 693
 694 EXPORT_SYMBOL(ide_unregister);
 695
 696
 697 /**
 698  *      ide_setup_ports         -       set up IDE interface ports
 699  *      @hw: register descriptions
 700  *      @base: base register
 701  *      @offsets: table of register offsets
 702  *      @ctrl: control register
 703  *      @ack_irq: IRQ ack
 704  *      @irq: interrupt lie
 705  *
 706  *      Setup hw_regs_t structure described by parameters.  You
 707  *      may set up the hw structure yourself OR use this routine to
 708  *      do it for you. This is basically a helper
 709  *
 710  */
 711
 712 void ide_setup_ports (  hw_regs_t *hw,
 713                         unsigned long base, int *offsets,
 714                         unsigned long ctrl, unsigned long intr,
 715                         ide_ack_intr_t *ack_intr,
 716 /*
 717  *                      ide_io_ops_t *iops,
 718  */
 719                         int irq)
 720 {
 721         int i;
 722
 723         memset(hw, 0, sizeof(hw_regs_t));
 724         for (i = 0; i < IDE_NR_PORTS; i++) {
 725                 if (offsets[i] == -1) {
 726                         switch(i) {
 727                                 case IDE_CONTROL_OFFSET:
 728                                         hw->io_ports[i] = ctrl;
 729                                         break;
 730 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
 731                                 case IDE_IRQ_OFFSET:
 732                                         hw->io_ports[i] = intr;
 733                                         break;
 734 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
 735                                 default:
 736                                         hw->io_ports[i] = 0;
 737                                         break;
 738                         }
 739                 } else {
 740                         hw->io_ports[i] = base + offsets[i];
 741                 }
 742         }
 743         hw->irq = irq;
 744         hw->dma = NO_DMA;
 745         hw->ack_intr = ack_intr;
 746 /*
 747  *      hw->iops = iops;
 748  */
 749 }
 750
 751 /**
 752  *      ide_register_hw_with_fixup      -       register IDE interface
 753  *      @hw: hardware registers
 754  *      @hwifp: pointer to returned hwif
 755  *      @fixup: fixup function
 756  *
 757  *      Register an IDE interface, specifying exactly the registers etc.
 758  *      Set init=1 iff calling before probes have taken place.
 759  *
 760  *      Returns -1 on error.
 761  */
 762
 763 int ide_register_hw_with_fixup(hw_regs_t *hw, ide_hwif_t **hwifp, void(*fixup)(ide_hwif_t *hwif))
 764 {
 765         int index, retry = 1;
 766         ide_hwif_t *hwif;
 767
 768         do {
 769                 for (index = 0; index < MAX_HWIFS; ++index) {
 770                         hwif = &ide_hwifs[index];
 771                         if (hwif->hw.io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
 772                                 goto found;
 773                 }
 774                 for (index = 0; index < MAX_HWIFS; ++index) {
 775                         hwif = &ide_hwifs[index];
 776                         if (hwif->hold)
 777                                 continue;
 778                         if ((!hwif->present && !hwif->mate && !initializing) ||
 779                             (!hwif->hw.io_ports[IDE_DATA_OFFSET] && initializing))
 780                                 goto found;
 781                 }
 782                 for (index = 0; index < MAX_HWIFS; index++)
 783                         ide_unregister(index);
 784         } while (retry--);
 785         return -1;
 786 found:
 787         if (hwif->present)
 788                 ide_unregister(index);
 789         else if (!hwif->hold) {
 790                 init_hwif_data(hwif, index);
 791                 init_hwif_default(hwif, index);
 792         }
 793         if (hwif->present)
 794                 return -1;
 795         memcpy(&hwif->hw, hw, sizeof(*hw));
 796         memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports));
 797         hwif->irq = hw->irq;
 798         hwif->noprobe = 0;
 799         hwif->chipset = hw->chipset;
 800         hwif->gendev.parent = hw->dev;
 801
 802         if (!initializing) {
 803                 probe_hwif_init_with_fixup(hwif, fixup);
 804                 create_proc_ide_interfaces();
 805         }
 806
 807         if (hwifp)
 808                 *hwifp = hwif;
 809
 810         return (initializing || hwif->present) ? index : -1;
 811 }
 812
 813 EXPORT_SYMBOL(ide_register_hw_with_fixup);
 814
 815 int ide_register_hw(hw_regs_t *hw, ide_hwif_t **hwifp)
 816 {
 817         return ide_register_hw_with_fixup(hw, hwifp, NULL);
 818 }
 819
 820 EXPORT_SYMBOL(ide_register_hw);
 821
 822 /*
 823  *      Locks for IDE setting functionality
 824  */
 825
 826 DECLARE_MUTEX(ide_setting_sem);
 827
 828 /**
 829  *      __ide_add_setting       -       add an ide setting option
 830  *      @drive: drive to use
 831  *      @name: setting name
 832  *      @rw: true if the function is read write
 833  *      @read_ioctl: function to call on read
 834  *      @write_ioctl: function to call on write
 835  *      @data_type: type of data
 836  *      @min: range minimum
 837  *      @max: range maximum
 838  *      @mul_factor: multiplication scale
 839  *      @div_factor: divison scale
 840  *      @data: private data field
 841  *      @set: setting
 842  *      @auto_remove: setting auto removal flag
 843  *
 844  *      Removes the setting named from the device if it is present.
 845  *      The function takes the settings_lock to protect against
 846  *      parallel changes. This function must not be called from IRQ
 847  *      context. Returns 0 on success or -1 on failure.
 848  *
 849  *      BUGS: This code is seriously over-engineered. There is also
 850  *      magic about how the driver specific features are setup. If
 851  *      a driver is attached we assume the driver settings are auto
 852  *      remove.
 853  */
 854
 855 static int __ide_add_setting(ide_drive_t *drive, const char *name, int rw, int read_ioctl, int write_ioctl, int data_type, int min, int max, int mul_factor, int div_factor, void *data, ide_procset_t *set, int auto_remove)
 856 {
 857         ide_settings_t **p = (ide_settings_t **) &drive->settings, *setting = NULL;
 858
 859         down(&ide_setting_sem);
 860         while ((*p) && strcmp((*p)->name, name) < 0)
 861                 p = &((*p)->next);
 862         if ((setting = kzalloc(sizeof(*setting), GFP_KERNEL)) == NULL)
 863                 goto abort;
 864         if ((setting->name = kmalloc(strlen(name) + 1, GFP_KERNEL)) == NULL)
 865                 goto abort;
 866         strcpy(setting->name, name);
 867         setting->rw = rw;
 868         setting->read_ioctl = read_ioctl;
 869         setting->write_ioctl = write_ioctl;
 870         setting->data_type = data_type;
 871         setting->min = min;
 872         setting->max = max;
 873         setting->mul_factor = mul_factor;
 874         setting->div_factor = div_factor;
 875         setting->data = data;
 876         setting->set = set;
 877
 878         setting->next = *p;
 879         if (auto_remove)
 880                 setting->auto_remove = 1;
 881         *p = setting;
 882         up(&ide_setting_sem);
 883         return 0;
 884 abort:
 885         up(&ide_setting_sem);
 886         kfree(setting);
 887         return -1;
 888 }
 889
 890 int ide_add_setting(ide_drive_t *drive, const char *name, int rw, int read_ioctl, int write_ioctl, int data_type, int min, int max, int mul_factor, int div_factor, void *data, ide_procset_t *set)
 891 {
 892         return __ide_add_setting(drive, name, rw, read_ioctl, write_ioctl, data_type, min, max, mul_factor, div_factor, data, set, 1);
 893 }
 894
 895 EXPORT_SYMBOL(ide_add_setting);
 896
 897 /**
 898  *      __ide_remove_setting    -       remove an ide setting option
 899  *      @drive: drive to use
 900  *      @name: setting name
 901  *
 902  *      Removes the setting named from the device if it is present.
 903  *      The caller must hold the setting semaphore.
 904  */
 905
 906 static void __ide_remove_setting (ide_drive_t *drive, char *name)
 907 {
 908         ide_settings_t **p, *setting;
 909
 910         p = (ide_settings_t **) &drive->settings;
 911
 912         while ((*p) && strcmp((*p)->name, name))
 913                 p = &((*p)->next);
 914         if ((setting = (*p)) == NULL)
 915                 return;
 916
 917         (*p) = setting->next;
 918
 919         kfree(setting->name);
 920         kfree(setting);
 921 }
 922
 923 /**
 924  *      ide_find_setting_by_ioctl       -       find a drive specific ioctl
 925  *      @drive: drive to scan
 926  *      @cmd: ioctl command to handle
 927  *
 928  *      Scan's the device setting table for a matching entry and returns
 929  *      this or NULL if no entry is found. The caller must hold the
 930  *      setting semaphore
 931  */
 932
 933 static ide_settings_t *ide_find_setting_by_ioctl (ide_drive_t *drive, int cmd)
 934 {
 935         ide_settings_t *setting = drive->settings;
 936
 937         while (setting) {
 938                 if (setting->read_ioctl == cmd || setting->write_ioctl == cmd)
 939                         break;
 940                 setting = setting->next;
 941         }
 942
 943         return setting;
 944 }
 945
 946 /**
 947  *      ide_find_setting_by_name        -       find a drive specific setting
 948  *      @drive: drive to scan
 949  *      @name: setting name
 950  *
 951  *      Scan's the device setting table for a matching entry and returns
 952  *      this or NULL if no entry is found. The caller must hold the
 953  *      setting semaphore
 954  */
 955
 956 ide_settings_t *ide_find_setting_by_name (ide_drive_t *drive, char *name)
 957 {
 958         ide_settings_t *setting = drive->settings;
 959
 960         while (setting) {
 961                 if (strcmp(setting->name, name) == 0)
 962                         break;
 963                 setting = setting->next;
 964         }
 965         return setting;
 966 }
 967
 968 /**
 969  *      auto_remove_settings    -       remove driver specific settings
 970  *      @drive: drive
 971  *
 972  *      Automatically remove all the driver specific settings for this
 973  *      drive. This function may not be called from IRQ context. The
 974  *      caller must hold ide_setting_sem.
 975  */
 976
 977 static void auto_remove_settings (ide_drive_t *drive)
 978 {
 979         ide_settings_t *setting;
 980 repeat:
 981         setting = drive->settings;
 982         while (setting) {
 983                 if (setting->auto_remove) {
 984                         __ide_remove_setting(drive, setting->name);
 985                         goto repeat;
 986                 }
 987                 setting = setting->next;
 988         }
 989 }
 990
 991 /**
 992  *      ide_read_setting        -       read an IDE setting
 993  *      @drive: drive to read from
 994  *      @setting: drive setting
 995  *
 996  *      Read a drive setting and return the value. The caller
 997  *      must hold the ide_setting_sem when making this call.
 998  *
 999  *      BUGS: the data return and error are the same return value
1000  *      so an error -EINVAL and true return of the same value cannot
1001  *      be told apart
1002  */
1003
1004 int ide_read_setting (ide_drive_t *drive, ide_settings_t *setting)
1005 {
1006         int             val = -EINVAL;
1007         unsigned long   flags;
1008
1009         if ((setting->rw & SETTING_READ)) {
1010                 spin_lock_irqsave(&ide_lock, flags);
1011                 switch(setting->data_type) {
1012                         case TYPE_BYTE:
1013                                 val = *((u8 *) setting->data);
1014                                 break;
1015                         case TYPE_SHORT:
1016                                 val = *((u16 *) setting->data);
1017                                 break;
1018                         case TYPE_INT:
1019                         case TYPE_INTA:
1020                                 val = *((u32 *) setting->data);
1021                                 break;
1022                 }
1023                 spin_unlock_irqrestore(&ide_lock, flags);
1024         }
1025         return val;
1026 }
1027
1028 /**
1029  *      ide_spin_wait_hwgroup   -       wait for group
1030  *      @drive: drive in the group
1031  *
1032  *      Wait for an IDE device group to go non busy and then return
1033  *      holding the ide_lock which guards the hwgroup->busy status
1034  *      and right to use it.
1035  */
1036
1037 int ide_spin_wait_hwgroup (ide_drive_t *drive)
1038 {
1039         ide_hwgroup_t *hwgroup = HWGROUP(drive);
1040         unsigned long timeout = jiffies + (3 * HZ);
1041
1042         spin_lock_irq(&ide_lock);
1043
1044         while (hwgroup->busy) {
1045                 unsigned long lflags;
1046                 spin_unlock_irq(&ide_lock);
1047                 local_irq_set(lflags);
1048                 if (time_after(jiffies, timeout)) {
1049                         local_irq_restore(lflags);
1050                         printk(KERN_ERR "%s: channel busy\n", drive->name);
1051                         return -EBUSY;
1052                 }
1053                 local_irq_restore(lflags);
1054                 spin_lock_irq(&ide_lock);
1055         }
1056         return 0;
1057 }
1058
1059 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
1060
1061 /**
1062  *      ide_write_setting       -       read an IDE setting
1063  *      @drive: drive to read from
1064  *      @setting: drive setting
1065  *      @val: value
1066  *
1067  *      Write a drive setting if it is possible. The caller
1068  *      must hold the ide_setting_sem when making this call.
1069  *
1070  *      BUGS: the data return and error are the same return value
1071  *      so an error -EINVAL and true return of the same value cannot
1072  *      be told apart
1073  *
1074  *      FIXME:  This should be changed to enqueue a special request
1075  *      to the driver to change settings, and then wait on a sema for completion.
1076  *      The current scheme of polling is kludgy, though safe enough.
1077  */
1078
1079 int ide_write_setting (ide_drive_t *drive, ide_settings_t *setting, int val)
1080 {
1081         int i;
1082         u32 *p;
1083
1084         if (!capable(CAP_SYS_ADMIN))
1085                 return -EACCES;
1086         if (!(setting->rw & SETTING_WRITE))
1087                 return -EPERM;
1088         if (val < setting->min || val > setting->max)
1089                 return -EINVAL;
1090         if (setting->set)
1091                 return setting->set(drive, val);
1092         if (ide_spin_wait_hwgroup(drive))
1093                 return -EBUSY;
1094         switch (setting->data_type) {
1095                 case TYPE_BYTE:
1096                         *((u8 *) setting->data) = val;
1097                         break;
1098                 case TYPE_SHORT:
1099                         *((u16 *) setting->data) = val;
1100                         break;
1101                 case TYPE_INT:
1102                         *((u32 *) setting->data) = val;
1103                         break;
1104                 case TYPE_INTA:
1105                         p = (u32 *) setting->data;
1106                         for (i = 0; i < 1 << PARTN_BITS; i++, p++)
1107                                 *p = val;
1108                         break;
1109         }
1110         spin_unlock_irq(&ide_lock);
1111         return 0;
1112 }
1113
1114 static int set_io_32bit(ide_drive_t *drive, int arg)
1115 {
1116         drive->io_32bit = arg;
1117 #ifdef CONFIG_BLK_DEV_DTC2278
1118         if (HWIF(drive)->chipset == ide_dtc2278)
1119                 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
1120 #endif /* CONFIG_BLK_DEV_DTC2278 */
1121         return 0;
1122 }
1123
1124 static int set_using_dma (ide_drive_t *drive, int arg)
1125 {
1126 #ifdef CONFIG_BLK_DEV_IDEDMA
1127         ide_hwif_t *hwif = drive->hwif;
1128         int err = -EPERM;
1129
1130         if (!drive->id || !(drive->id->capability & 1))
1131                 goto out;
1132
1133         if (hwif->ide_dma_check == NULL)
1134                 goto out;
1135
1136         err = -EBUSY;
1137         if (ide_spin_wait_hwgroup(drive))
1138                 goto out;
1139         /*
1140          * set ->busy flag, unlock and let it ride
1141          */
1142         hwif->hwgroup->busy = 1;
1143         spin_unlock_irq(&ide_lock);
1144
1145         err = 0;
1146
1147         if (arg) {
1148                 if (ide_set_dma(drive) || hwif->ide_dma_on(drive))
1149                         err = -EIO;
1150         } else
1151                 ide_dma_off(drive);
1152
1153         /*
1154          * lock, clear ->busy flag and unlock before leaving
1155          */
1156         spin_lock_irq(&ide_lock);
1157         hwif->hwgroup->busy = 0;
1158         spin_unlock_irq(&ide_lock);
1159 out:
1160         return err;
1161 #else
1162         return -EPERM;
1163 #endif
1164 }
1165
1166 static int set_pio_mode (ide_drive_t *drive, int arg)
1167 {
1168         struct request rq;
1169
1170         if (!HWIF(drive)->tuneproc)
1171                 return -ENOSYS;
1172         if (drive->special.b.set_tune)
1173                 return -EBUSY;
1174         ide_init_drive_cmd(&rq);
1175         drive->tune_req = (u8) arg;
1176         drive->special.b.set_tune = 1;
1177         (void) ide_do_drive_cmd(drive, &rq, ide_wait);
1178         return 0;
1179 }
1180
1181 static int set_xfer_rate (ide_drive_t *drive, int arg)
1182 {
1183         int err = ide_wait_cmd(drive,
1184                         WIN_SETFEATURES, (u8) arg,
1185                         SETFEATURES_XFER, 0, NULL);
1186
1187         if (!err && arg) {
1188                 ide_set_xfer_rate(drive, (u8) arg);
1189                 ide_driveid_update(drive);
1190         }
1191         return err;
1192 }
1193
1194 /**
1195  *      ide_add_generic_settings        -       generic ide settings
1196  *      @drive: drive being configured
1197  *
1198  *      Add the generic parts of the system settings to the /proc files and
1199  *      ioctls for this IDE device. The caller must not be holding the
1200  *      ide_setting_sem.
1201  */
1202
1203 void ide_add_generic_settings (ide_drive_t *drive)
1204 {
1205 /*
1206  *                        drive         setting name            read/write access                               read ioctl              write ioctl             data type       min     max                             mul_factor      div_factor      data pointer                    set function
1207  */
1208         __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);
1209         __ide_add_setting(drive,        "keepsettings",         SETTING_RW,                                     HDIO_GET_KEEPSETTINGS,  HDIO_SET_KEEPSETTINGS,  TYPE_BYTE,      0,      1,                              1,              1,              &drive->keep_settings,          NULL,           0);
1210         __ide_add_setting(drive,        "nice1",                SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->nice1,                  NULL,           0);
1211         __ide_add_setting(drive,        "pio_mode",             SETTING_WRITE,                                  -1,                     HDIO_SET_PIO_MODE,      TYPE_BYTE,      0,      255,                            1,              1,              NULL,                           set_pio_mode,   0);
1212         __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);
1213         __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);
1214         __ide_add_setting(drive,        "init_speed",           SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->init_speed,             NULL,           0);
1215         __ide_add_setting(drive,        "current_speed",        SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->current_speed,          set_xfer_rate,  0);
1216         __ide_add_setting(drive,        "number",               SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      3,                              1,              1,              &drive->dn,                     NULL,           0);
1217 }
1218
1219 /**
1220  *      system_bus_clock        -       clock guess
1221  *
1222  *      External version of the bus clock guess used by very old IDE drivers
1223  *      for things like VLB timings. Should not be used.
1224  */
1225
1226 int system_bus_clock (void)
1227 {
1228         return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
1229 }
1230
1231 EXPORT_SYMBOL(system_bus_clock);
1232
1233 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
1234 {
1235         ide_drive_t *drive = dev->driver_data;
1236         ide_hwif_t *hwif = HWIF(drive);
1237         struct request rq;
1238         struct request_pm_state rqpm;
1239         ide_task_t args;
1240
1241         /* Call ACPI _GTM only once */
1242         if (!(drive->dn % 2))
1243                 ide_acpi_get_timing(hwif);
1244
1245         memset(&rq, 0, sizeof(rq));
1246         memset(&rqpm, 0, sizeof(rqpm));
1247         memset(&args, 0, sizeof(args));
1248         rq.cmd_type = REQ_TYPE_PM_SUSPEND;
1249         rq.special = &args;
1250         rq.data = &rqpm;
1251         rqpm.pm_step = ide_pm_state_start_suspend;
1252         if (mesg.event == PM_EVENT_PRETHAW)
1253                 mesg.event = PM_EVENT_FREEZE;
1254         rqpm.pm_state = mesg.event;
1255
1256         return ide_do_drive_cmd(drive, &rq, ide_wait);
1257 }
1258
1259 static int generic_ide_resume(struct device *dev)
1260 {
1261         ide_drive_t *drive = dev->driver_data;
1262         ide_hwif_t *hwif = HWIF(drive);
1263         struct request rq;
1264         struct request_pm_state rqpm;
1265         ide_task_t args;
1266
1267         /* Call ACPI _STM only once */
1268         if (!(drive->dn % 2))
1269                 ide_acpi_push_timing(hwif);
1270
1271         ide_acpi_exec_tfs(drive);
1272
1273         memset(&rq, 0, sizeof(rq));
1274         memset(&rqpm, 0, sizeof(rqpm));
1275         memset(&args, 0, sizeof(args));
1276         rq.cmd_type = REQ_TYPE_PM_RESUME;
1277         rq.special = &args;
1278         rq.data = &rqpm;
1279         rqpm.pm_step = ide_pm_state_start_resume;
1280         rqpm.pm_state = PM_EVENT_ON;
1281
1282         return ide_do_drive_cmd(drive, &rq, ide_head_wait);
1283 }
1284
1285 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
1286                         unsigned int cmd, unsigned long arg)
1287 {
1288         ide_settings_t *setting;
1289         ide_driver_t *drv;
1290         int err = 0;
1291         void __user *p = (void __user *)arg;
1292
1293         down(&ide_setting_sem);
1294         if ((setting = ide_find_setting_by_ioctl(drive, cmd)) != NULL) {
1295                 if (cmd == setting->read_ioctl) {
1296                         err = ide_read_setting(drive, setting);
1297                         up(&ide_setting_sem);
1298                         return err >= 0 ? put_user(err, (long __user *)arg) : err;
1299                 } else {
1300                         if (bdev != bdev->bd_contains)
1301                                 err = -EINVAL;
1302                         else
1303                                 err = ide_write_setting(drive, setting, arg);
1304                         up(&ide_setting_sem);
1305                         return err;
1306                 }
1307         }
1308         up(&ide_setting_sem);
1309
1310         switch (cmd) {
1311                 case HDIO_OBSOLETE_IDENTITY:
1312                 case HDIO_GET_IDENTITY:
1313                         if (bdev != bdev->bd_contains)
1314                                 return -EINVAL;
1315                         if (drive->id_read == 0)
1316                                 return -ENOMSG;
1317                         if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1318                                 return -EFAULT;
1319                         return 0;
1320
1321                 case HDIO_GET_NICE:
1322                         return put_user(drive->dsc_overlap      <<      IDE_NICE_DSC_OVERLAP    |
1323                                         drive->atapi_overlap    <<      IDE_NICE_ATAPI_OVERLAP  |
1324                                         drive->nice0            <<      IDE_NICE_0              |
1325                                         drive->nice1            <<      IDE_NICE_1              |
1326                                         drive->nice2            <<      IDE_NICE_2,
1327                                         (long __user *) arg);
1328
1329 #ifdef CONFIG_IDE_TASK_IOCTL
1330                 case HDIO_DRIVE_TASKFILE:
1331                         if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1332                                 return -EACCES;
1333                         switch(drive->media) {
1334                                 case ide_disk:
1335                                         return ide_taskfile_ioctl(drive, cmd, arg);
1336                                 default:
1337                                         return -ENOMSG;
1338                         }
1339 #endif /* CONFIG_IDE_TASK_IOCTL */
1340
1341                 case HDIO_DRIVE_CMD:
1342                         if (!capable(CAP_SYS_RAWIO))
1343                                 return -EACCES;
1344                         return ide_cmd_ioctl(drive, cmd, arg);
1345
1346                 case HDIO_DRIVE_TASK:
1347                         if (!capable(CAP_SYS_RAWIO))
1348                                 return -EACCES;
1349                         return ide_task_ioctl(drive, cmd, arg);
1350
1351                 case HDIO_SCAN_HWIF:
1352                 {
1353                         hw_regs_t hw;
1354                         int args[3];
1355                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1356                         if (copy_from_user(args, p, 3 * sizeof(int)))
1357                                 return -EFAULT;
1358                         memset(&hw, 0, sizeof(hw));
1359                         ide_init_hwif_ports(&hw, (unsigned long) args[0],
1360                                             (unsigned long) args[1], NULL);
1361                         hw.irq = args[2];
1362                         if (ide_register_hw(&hw, NULL) == -1)
1363                                 return -EIO;
1364                         return 0;
1365                 }
1366                 case HDIO_UNREGISTER_HWIF:
1367                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1368                         /* (arg > MAX_HWIFS) checked in function */
1369                         ide_unregister(arg);
1370                         return 0;
1371                 case HDIO_SET_NICE:
1372                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1373                         if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1374                                 return -EPERM;
1375                         drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1376                         drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1377                         if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1378                                 drive->dsc_overlap = 0;
1379                                 return -EPERM;
1380                         }
1381                         drive->nice1 = (arg >> IDE_NICE_1) & 1;
1382                         return 0;
1383                 case HDIO_DRIVE_RESET:
1384                 {
1385                         unsigned long flags;
1386                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1387
1388                         /*
1389                          *      Abort the current command on the
1390                          *      group if there is one, taking
1391                          *      care not to allow anything else
1392                          *      to be queued and to die on the
1393                          *      spot if we miss one somehow
1394                          */
1395
1396                         spin_lock_irqsave(&ide_lock, flags);
1397
1398                         if (HWGROUP(drive)->resetting) {
1399                                 spin_unlock_irqrestore(&ide_lock, flags);
1400                                 return -EBUSY;
1401                         }
1402
1403                         ide_abort(drive, "drive reset");
1404
1405                         BUG_ON(HWGROUP(drive)->handler);
1406
1407                         /* Ensure nothing gets queued after we
1408                            drop the lock. Reset will clear the busy */
1409
1410                         HWGROUP(drive)->busy = 1;
1411                         spin_unlock_irqrestore(&ide_lock, flags);
1412                         (void) ide_do_reset(drive);
1413
1414                         return 0;
1415                 }
1416
1417                 case CDROMEJECT:
1418                 case CDROMCLOSETRAY:
1419                         return scsi_cmd_ioctl(file, bdev->bd_disk, cmd, p);
1420
1421                 case HDIO_GET_BUSSTATE:
1422                         if (!capable(CAP_SYS_ADMIN))
1423                                 return -EACCES;
1424                         if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1425                                 return -EFAULT;
1426                         return 0;
1427
1428                 case HDIO_SET_BUSSTATE:
1429                         if (!capable(CAP_SYS_ADMIN))
1430                                 return -EACCES;
1431                         if (HWIF(drive)->busproc)
1432                                 return HWIF(drive)->busproc(drive, (int)arg);
1433                         return -EOPNOTSUPP;
1434                 default:
1435                         return -EINVAL;
1436         }
1437 }
1438
1439 EXPORT_SYMBOL(generic_ide_ioctl);
1440
1441 /*
1442  * stridx() returns the offset of c within s,
1443  * or -1 if c is '\0' or not found within s.
1444  */
1445 static int __init stridx (const char *s, char c)
1446 {
1447         char *i = strchr(s, c);
1448         return (i && c) ? i - s : -1;
1449 }
1450
1451 /*
1452  * match_parm() does parsing for ide_setup():
1453  *
1454  * 1. the first char of s must be '='.
1455  * 2. if the remainder matches one of the supplied keywords,
1456  *     the index (1 based) of the keyword is negated and returned.
1457  * 3. if the remainder is a series of no more than max_vals numbers
1458  *     separated by commas, the numbers are saved in vals[] and a
1459  *     count of how many were saved is returned.  Base10 is assumed,
1460  *     and base16 is allowed when prefixed with "0x".
1461  * 4. otherwise, zero is returned.
1462  */
1463 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1464 {
1465         static const char *decimal = "0123456789";
1466         static const char *hex = "0123456789abcdef";
1467         int i, n;
1468
1469         if (*s++ == '=') {
1470                 /*
1471                  * Try matching against the supplied keywords,
1472                  * and return -(index+1) if we match one
1473                  */
1474                 if (keywords != NULL) {
1475                         for (i = 0; *keywords != NULL; ++i) {
1476                                 if (!strcmp(s, *keywords++))
1477                                         return -(i+1);
1478                         }
1479                 }
1480                 /*
1481                  * Look for a series of no more than "max_vals"
1482                  * numeric values separated by commas, in base10,
1483                  * or base16 when prefixed with "0x".
1484                  * Return a count of how many were found.
1485                  */
1486                 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1487                         vals[n] = i;
1488                         while ((i = stridx(decimal, *++s)) >= 0)
1489                                 vals[n] = (vals[n] * 10) + i;
1490                         if (*s == 'x' && !vals[n]) {
1491                                 while ((i = stridx(hex, *++s)) >= 0)
1492                                         vals[n] = (vals[n] * 0x10) + i;
1493                         }
1494                         if (++n == max_vals)
1495                                 break;
1496                         if (*s == ',' || *s == ';')
1497                                 ++s;
1498                 }
1499                 if (!*s)
1500                         return n;
1501         }
1502         return 0;       /* zero = nothing matched */
1503 }
1504
1505 #ifdef CONFIG_BLK_DEV_ALI14XX
1506 extern int probe_ali14xx;
1507 extern int ali14xx_init(void);
1508 #endif
1509 #ifdef CONFIG_BLK_DEV_UMC8672
1510 extern int probe_umc8672;
1511 extern int umc8672_init(void);
1512 #endif
1513 #ifdef CONFIG_BLK_DEV_DTC2278
1514 extern int probe_dtc2278;
1515 extern int dtc2278_init(void);
1516 #endif
1517 #ifdef CONFIG_BLK_DEV_HT6560B
1518 extern int probe_ht6560b;
1519 extern int ht6560b_init(void);
1520 #endif
1521 #ifdef CONFIG_BLK_DEV_QD65XX
1522 extern int probe_qd65xx;
1523 extern int qd65xx_init(void);
1524 #endif
1525
1526 static int __initdata is_chipset_set[MAX_HWIFS];
1527
1528 /*
1529  * ide_setup() gets called VERY EARLY during initialization,
1530  * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1531  *
1532  * Remember to update Documentation/ide.txt if you change something here.
1533  */
1534 static int __init ide_setup(char *s)
1535 {
1536         int i, vals[3];
1537         ide_hwif_t *hwif;
1538         ide_drive_t *drive;
1539         unsigned int hw, unit;
1540         const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1541         const char max_hwif  = '0' + (MAX_HWIFS - 1);
1542
1543
1544         if (strncmp(s,"hd",2) == 0 && s[2] == '=')      /* hd= is for hd.c   */
1545                 return 0;                               /* driver and not us */
1546
1547         if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1548                 return 0;
1549
1550         printk(KERN_INFO "ide_setup: %s", s);
1551         init_ide_data ();
1552
1553 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1554         if (!strcmp(s, "ide=doubler")) {
1555                 extern int ide_doubler;
1556
1557                 printk(" : Enabled support for IDE doublers\n");
1558                 ide_doubler = 1;
1559                 return 1;
1560         }
1561 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1562
1563         if (!strcmp(s, "ide=nodma")) {
1564                 printk(" : Prevented DMA\n");
1565                 noautodma = 1;
1566                 return 1;
1567         }
1568
1569 #ifdef CONFIG_BLK_DEV_IDEPCI
1570         if (!strcmp(s, "ide=reverse")) {
1571                 ide_scan_direction = 1;
1572                 printk(" : Enabled support for IDE inverse scan order.\n");
1573                 return 1;
1574         }
1575 #endif /* CONFIG_BLK_DEV_IDEPCI */
1576
1577 #ifdef CONFIG_BLK_DEV_IDEACPI
1578         if (!strcmp(s, "ide=noacpi")) {
1579                 //printk(" : Disable IDE ACPI support.\n");
1580                 ide_noacpi = 1;
1581                 return 1;
1582         }
1583         if (!strcmp(s, "ide=acpigtf")) {
1584                 //printk(" : Enable IDE ACPI _GTF support.\n");
1585                 ide_noacpitfs = 0;
1586                 return 1;
1587         }
1588         if (!strcmp(s, "ide=acpionboot")) {
1589                 //printk(" : Call IDE ACPI methods on boot.\n");
1590                 ide_noacpionboot = 0;
1591                 return 1;
1592         }
1593 #endif /* CONFIG_BLK_DEV_IDEACPI */
1594
1595         /*
1596          * Look for drive options:  "hdx="
1597          */
1598         if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1599                 const char *hd_words[] = {
1600                         "none", "noprobe", "nowerr", "cdrom", "minus5",
1601                         "autotune", "noautotune", "minus8", "swapdata", "bswap",
1602                         "noflush", "remap", "remap63", "scsi", NULL };
1603                 unit = s[2] - 'a';
1604                 hw   = unit / MAX_DRIVES;
1605                 unit = unit % MAX_DRIVES;
1606                 hwif = &ide_hwifs[hw];
1607                 drive = &hwif->drives[unit];
1608                 if (strncmp(s + 4, "ide-", 4) == 0) {
1609                         strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1610                         goto done;
1611                 }
1612                 switch (match_parm(&s[3], hd_words, vals, 3)) {
1613                         case -1: /* "none" */
1614                         case -2: /* "noprobe" */
1615                                 drive->noprobe = 1;
1616                                 goto done;
1617                         case -3: /* "nowerr" */
1618                                 drive->bad_wstat = BAD_R_STAT;
1619                                 hwif->noprobe = 0;
1620                                 goto done;
1621                         case -4: /* "cdrom" */
1622                                 drive->present = 1;
1623                                 drive->media = ide_cdrom;
1624                                 /* an ATAPI device ignores DRDY */
1625                                 drive->ready_stat = 0;
1626                                 hwif->noprobe = 0;
1627                                 goto done;
1628                         case -6: /* "autotune" */
1629                                 drive->autotune = IDE_TUNE_AUTO;
1630                                 goto obsolete_option;
1631                         case -7: /* "noautotune" */
1632                                 drive->autotune = IDE_TUNE_NOAUTO;
1633                                 goto obsolete_option;
1634                         case -9: /* "swapdata" */
1635                         case -10: /* "bswap" */
1636                                 drive->bswap = 1;
1637                                 goto done;
1638                         case -11: /* noflush */
1639                                 drive->noflush = 1;
1640                                 goto done;
1641                         case -12: /* "remap" */
1642                                 drive->remap_0_to_1 = 1;
1643                                 goto done;
1644                         case -13: /* "remap63" */
1645                                 drive->sect0 = 63;
1646                                 goto done;
1647                         case -14: /* "scsi" */
1648                                 drive->scsi = 1;
1649                                 goto done;
1650                         case 3: /* cyl,head,sect */
1651                                 drive->media    = ide_disk;
1652                                 drive->ready_stat = READY_STAT;
1653                                 drive->cyl      = drive->bios_cyl  = vals[0];
1654                                 drive->head     = drive->bios_head = vals[1];
1655                                 drive->sect     = drive->bios_sect = vals[2];
1656                                 drive->present  = 1;
1657                                 drive->forced_geom = 1;
1658                                 hwif->noprobe = 0;
1659                                 goto done;
1660                         default:
1661                                 goto bad_option;
1662                 }
1663         }
1664
1665         if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1666                 goto bad_option;
1667         /*
1668          * Look for bus speed option:  "idebus="
1669          */
1670         if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1671                 if (match_parm(&s[6], NULL, vals, 1) != 1)
1672                         goto bad_option;
1673                 if (vals[0] >= 20 && vals[0] <= 66) {
1674                         idebus_parameter = vals[0];
1675                 } else
1676                         printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1677                 goto done;
1678         }
1679         /*
1680          * Look for interface options:  "idex="
1681          */
1682         if (s[3] >= '0' && s[3] <= max_hwif) {
1683                 /*
1684                  * Be VERY CAREFUL changing this: note hardcoded indexes below
1685                  * (-8, -9, -10) are reserved to ease the hardcoding.
1686                  */
1687                 static const char *ide_words[] = {
1688                         "noprobe", "serialize", "minus3", "minus4",
1689                         "reset", "dma", "ata66", "minus8", "minus9",
1690                         "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1691                         "dtc2278", "umc8672", "ali14xx", NULL };
1692                 hw = s[3] - '0';
1693                 hwif = &ide_hwifs[hw];
1694                 i = match_parm(&s[4], ide_words, vals, 3);
1695
1696                 /*
1697                  * Cryptic check to ensure chipset not already set for hwif.
1698                  * Note: we can't depend on hwif->chipset here.
1699                  */
1700                 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1701                         /* chipset already specified */
1702                         if (is_chipset_set[hw])
1703                                 goto bad_option;
1704                         if (i > -18 && i <= -11) {
1705                                 /* these drivers are for "ide0=" only */
1706                                 if (hw != 0)
1707                                         goto bad_hwif;
1708                                 /* chipset already specified for 2nd port */
1709                                 if (is_chipset_set[hw+1])
1710                                         goto bad_option;
1711                         }
1712                         is_chipset_set[hw] = 1;
1713                         printk("\n");
1714                 }
1715
1716                 switch (i) {
1717 #ifdef CONFIG_BLK_DEV_ALI14XX
1718                         case -17: /* "ali14xx" */
1719                                 probe_ali14xx = 1;
1720                                 goto done;
1721 #endif
1722 #ifdef CONFIG_BLK_DEV_UMC8672
1723                         case -16: /* "umc8672" */
1724                                 probe_umc8672 = 1;
1725                                 goto done;
1726 #endif
1727 #ifdef CONFIG_BLK_DEV_DTC2278
1728                         case -15: /* "dtc2278" */
1729                                 probe_dtc2278 = 1;
1730                                 goto done;
1731 #endif
1732 #ifdef CONFIG_BLK_DEV_CMD640
1733                         case -14: /* "cmd640_vlb" */
1734                         {
1735                                 extern int cmd640_vlb; /* flag for cmd640.c */
1736                                 cmd640_vlb = 1;
1737                                 goto done;
1738                         }
1739 #endif
1740 #ifdef CONFIG_BLK_DEV_HT6560B
1741                         case -13: /* "ht6560b" */
1742                                 probe_ht6560b = 1;
1743                                 goto done;
1744 #endif
1745 #ifdef CONFIG_BLK_DEV_QD65XX
1746                         case -12: /* "qd65xx" */
1747                                 probe_qd65xx = 1;
1748                                 goto done;
1749 #endif
1750 #ifdef CONFIG_BLK_DEV_4DRIVES
1751                         case -11: /* "four" drives on one set of ports */
1752                         {
1753                                 ide_hwif_t *mate = &ide_hwifs[hw^1];
1754                                 mate->drives[0].select.all ^= 0x20;
1755                                 mate->drives[1].select.all ^= 0x20;
1756                                 hwif->chipset = mate->chipset = ide_4drives;
1757                                 mate->irq = hwif->irq;
1758                                 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1759                                 hwif->mate = mate;
1760                                 mate->mate = hwif;
1761                                 hwif->serialized = mate->serialized = 1;
1762                                 goto obsolete_option;
1763                         }
1764 #endif /* CONFIG_BLK_DEV_4DRIVES */
1765                         case -10: /* minus10 */
1766                         case -9: /* minus9 */
1767                         case -8: /* minus8 */
1768                         case -4:
1769                         case -3:
1770                                 goto bad_option;
1771                         case -7: /* ata66 */
1772 #ifdef CONFIG_BLK_DEV_IDEPCI
1773                                 hwif->udma_four = 1;
1774                                 goto obsolete_option;
1775 #else
1776                                 goto bad_hwif;
1777 #endif
1778                         case -6: /* dma */
1779                                 hwif->autodma = 1;
1780                                 goto obsolete_option;
1781                         case -5: /* "reset" */
1782                                 hwif->reset = 1;
1783                                 goto obsolete_option;
1784                         case -2: /* "serialize" */
1785                                 hwif->mate = &ide_hwifs[hw^1];
1786                                 hwif->mate->mate = hwif;
1787                                 hwif->serialized = hwif->mate->serialized = 1;
1788                                 goto obsolete_option;
1789
1790                         case -1: /* "noprobe" */
1791                                 hwif->noprobe = 1;
1792                                 goto done;
1793
1794                         case 1: /* base */
1795                                 vals[1] = vals[0] + 0x206; /* default ctl */
1796                         case 2: /* base,ctl */
1797                                 vals[2] = 0;    /* default irq = probe for it */
1798                         case 3: /* base,ctl,irq */
1799                                 hwif->hw.irq = vals[2];
1800                                 ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq);
1801                                 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
1802                                 hwif->irq      = vals[2];
1803                                 hwif->noprobe  = 0;
1804                                 hwif->chipset  = ide_forced;
1805                                 goto obsolete_option;
1806
1807                         case 0: goto bad_option;
1808                         default:
1809                                 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1810                                 return 1;
1811                 }
1812         }
1813 bad_option:
1814         printk(" -- BAD OPTION\n");
1815         return 1;
1816 obsolete_option:
1817         printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1818         return 1;
1819 bad_hwif:
1820         printk("-- NOT SUPPORTED ON ide%d", hw);
1821 done:
1822         printk("\n");
1823         return 1;
1824 }
1825
1826 extern void __init pnpide_init(void);
1827 extern void __exit pnpide_exit(void);
1828 extern void __init h8300_ide_init(void);
1829
1830 /*
1831  * probe_for_hwifs() finds/initializes "known" IDE interfaces
1832  */
1833 static void __init probe_for_hwifs (void)
1834 {
1835 #ifdef CONFIG_BLK_DEV_IDEPCI
1836         ide_scan_pcibus(ide_scan_direction);
1837 #endif /* CONFIG_BLK_DEV_IDEPCI */
1838
1839 #ifdef CONFIG_ETRAX_IDE
1840         {
1841                 extern void init_e100_ide(void);
1842                 init_e100_ide();
1843         }
1844 #endif /* CONFIG_ETRAX_IDE */
1845 #ifdef CONFIG_BLK_DEV_CMD640
1846         {
1847                 extern void ide_probe_for_cmd640x(void);
1848                 ide_probe_for_cmd640x();
1849         }
1850 #endif /* CONFIG_BLK_DEV_CMD640 */
1851 #ifdef CONFIG_BLK_DEV_IDE_PMAC
1852         {
1853                 extern int pmac_ide_probe(void);
1854                 (void)pmac_ide_probe();
1855         }
1856 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
1857 #ifdef CONFIG_BLK_DEV_GAYLE
1858         {
1859                 extern void gayle_init(void);
1860                 gayle_init();
1861         }
1862 #endif /* CONFIG_BLK_DEV_GAYLE */
1863 #ifdef CONFIG_BLK_DEV_FALCON_IDE
1864         {
1865                 extern void falconide_init(void);
1866                 falconide_init();
1867         }
1868 #endif /* CONFIG_BLK_DEV_FALCON_IDE */
1869 #ifdef CONFIG_BLK_DEV_MAC_IDE
1870         {
1871                 extern void macide_init(void);
1872                 macide_init();
1873         }
1874 #endif /* CONFIG_BLK_DEV_MAC_IDE */
1875 #ifdef CONFIG_BLK_DEV_Q40IDE
1876         {
1877                 extern void q40ide_init(void);
1878                 q40ide_init();
1879         }
1880 #endif /* CONFIG_BLK_DEV_Q40IDE */
1881 #ifdef CONFIG_BLK_DEV_BUDDHA
1882         {
1883                 extern void buddha_init(void);
1884                 buddha_init();
1885         }
1886 #endif /* CONFIG_BLK_DEV_BUDDHA */
1887 #ifdef CONFIG_BLK_DEV_IDEPNP
1888         pnpide_init();
1889 #endif
1890 #ifdef CONFIG_H8300
1891         h8300_ide_init();
1892 #endif
1893 }
1894
1895 void ide_register_subdriver(ide_drive_t *drive, ide_driver_t *driver)
1896 {
1897 #ifdef CONFIG_PROC_FS
1898         ide_add_proc_entries(drive->proc, driver->proc, drive);
1899 #endif
1900 }
1901
1902 EXPORT_SYMBOL(ide_register_subdriver);
1903
1904 /**
1905  *      ide_unregister_subdriver        -       disconnect drive from driver
1906  *      @drive: drive to unplug
1907  *      @driver: driver
1908  *
1909  *      Disconnect a drive from the driver it was attached to and then
1910  *      clean up the various proc files and other objects attached to it.
1911  *
1912  *      Takes ide_setting_sem and ide_lock.
1913  *      Caller must hold none of the locks.
1914  */
1915
1916 void ide_unregister_subdriver(ide_drive_t *drive, ide_driver_t *driver)
1917 {
1918         unsigned long flags;
1919
1920 #ifdef CONFIG_PROC_FS
1921         ide_remove_proc_entries(drive->proc, driver->proc);
1922 #endif
1923         down(&ide_setting_sem);
1924         spin_lock_irqsave(&ide_lock, flags);
1925         /*
1926          * ide_setting_sem protects the settings list
1927          * ide_lock protects the use of settings
1928          *
1929          * so we need to hold both, ide_settings_sem because we want to
1930          * modify the settings list, and ide_lock because we cannot take
1931          * a setting out that is being used.
1932          *
1933          * OTOH both ide_{read,write}_setting are only ever used under
1934          * ide_setting_sem.
1935          */
1936         auto_remove_settings(drive);
1937         spin_unlock_irqrestore(&ide_lock, flags);
1938         up(&ide_setting_sem);
1939 }
1940
1941 EXPORT_SYMBOL(ide_unregister_subdriver);
1942
1943 /*
1944  * Probe module
1945  */
1946
1947 EXPORT_SYMBOL(ide_lock);
1948
1949 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1950 {
1951         return 1;
1952 }
1953
1954 static char *media_string(ide_drive_t *drive)
1955 {
1956         switch (drive->media) {
1957         case ide_disk:
1958                 return "disk";
1959         case ide_cdrom:
1960                 return "cdrom";
1961         case ide_tape:
1962                 return "tape";
1963         case ide_floppy:
1964                 return "floppy";
1965         case ide_optical:
1966                 return "optical";
1967         default:
1968                 return "UNKNOWN";
1969         }
1970 }
1971
1972 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1973 {
1974         ide_drive_t *drive = to_ide_device(dev);
1975         return sprintf(buf, "%s\n", media_string(drive));
1976 }
1977
1978 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1979 {
1980         ide_drive_t *drive = to_ide_device(dev);
1981         return sprintf(buf, "%s\n", drive->name);
1982 }
1983
1984 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1985 {
1986         ide_drive_t *drive = to_ide_device(dev);
1987         return sprintf(buf, "ide:m-%s\n", media_string(drive));
1988 }
1989
1990 static struct device_attribute ide_dev_attrs[] = {
1991         __ATTR_RO(media),
1992         __ATTR_RO(drivename),
1993         __ATTR_RO(modalias),
1994         __ATTR_NULL
1995 };
1996
1997 static int ide_uevent(struct device *dev, char **envp, int num_envp,
1998                       char *buffer, int buffer_size)
1999 {
2000         ide_drive_t *drive = to_ide_device(dev);
2001         int i = 0;
2002         int length = 0;
2003
2004         add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
2005                        "MEDIA=%s", media_string(drive));
2006         add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
2007                        "DRIVENAME=%s", drive->name);
2008         add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
2009                        "MODALIAS=ide:m-%s", media_string(drive));
2010         envp[i] = NULL;
2011         return 0;
2012 }
2013
2014 static int generic_ide_probe(struct device *dev)
2015 {
2016         ide_drive_t *drive = to_ide_device(dev);
2017         ide_driver_t *drv = to_ide_driver(dev->driver);
2018
2019         return drv->probe ? drv->probe(drive) : -ENODEV;
2020 }
2021
2022 static int generic_ide_remove(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 (drv->remove)
2028                 drv->remove(drive);
2029
2030         return 0;
2031 }
2032
2033 static void generic_ide_shutdown(struct device *dev)
2034 {
2035         ide_drive_t *drive = to_ide_device(dev);
2036         ide_driver_t *drv = to_ide_driver(dev->driver);
2037
2038         if (dev->driver && drv->shutdown)
2039                 drv->shutdown(drive);
2040 }
2041
2042 struct bus_type ide_bus_type = {
2043         .name           = "ide",
2044         .match          = ide_bus_match,
2045         .uevent         = ide_uevent,
2046         .probe          = generic_ide_probe,
2047         .remove         = generic_ide_remove,
2048         .shutdown       = generic_ide_shutdown,
2049         .dev_attrs      = ide_dev_attrs,
2050         .suspend        = generic_ide_suspend,
2051         .resume         = generic_ide_resume,
2052 };
2053
2054 EXPORT_SYMBOL_GPL(ide_bus_type);
2055
2056 /*
2057  * This is gets invoked once during initialization, to set *everything* up
2058  */
2059 static int __init ide_init(void)
2060 {
2061         int ret;
2062
2063         printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
2064         system_bus_speed = ide_system_bus_speed();
2065
2066         ret = bus_register(&ide_bus_type);
2067         if (ret < 0) {
2068                 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
2069                 return ret;
2070         }
2071
2072         init_ide_data();
2073
2074 #ifdef CONFIG_PROC_FS
2075         proc_ide_root = proc_mkdir("ide", NULL);
2076 #endif
2077
2078 #ifdef CONFIG_BLK_DEV_ALI14XX
2079         if (probe_ali14xx)
2080                 (void)ali14xx_init();
2081 #endif
2082 #ifdef CONFIG_BLK_DEV_UMC8672
2083         if (probe_umc8672)
2084                 (void)umc8672_init();
2085 #endif
2086 #ifdef CONFIG_BLK_DEV_DTC2278
2087         if (probe_dtc2278)
2088                 (void)dtc2278_init();
2089 #endif
2090 #ifdef CONFIG_BLK_DEV_HT6560B
2091         if (probe_ht6560b)
2092                 (void)ht6560b_init();
2093 #endif
2094 #ifdef CONFIG_BLK_DEV_QD65XX
2095         if (probe_qd65xx)
2096                 (void)qd65xx_init();
2097 #endif
2098
2099         initializing = 1;
2100         /* Probe for special PCI and other "known" interface chipsets. */
2101         probe_for_hwifs();
2102         initializing = 0;
2103
2104 #ifdef CONFIG_PROC_FS
2105         proc_ide_create();
2106 #endif
2107         return 0;
2108 }
2109
2110 #ifdef MODULE
2111 static char *options = NULL;
2112 module_param(options, charp, 0);
2113 MODULE_LICENSE("GPL");
2114
2115 static void __init parse_options (char *line)
2116 {
2117         char *next = line;
2118
2119         if (line == NULL || !*line)
2120                 return;
2121         while ((line = next) != NULL) {
2122                 if ((next = strchr(line,' ')) != NULL)
2123                         *next++ = 0;
2124                 if (!ide_setup(line))
2125                         printk (KERN_INFO "Unknown option '%s'\n", line);
2126         }
2127 }
2128
2129 int __init init_module (void)
2130 {
2131         parse_options(options);
2132         return ide_init();
2133 }
2134
2135 void __exit cleanup_module (void)
2136 {
2137         int index;
2138
2139         for (index = 0; index < MAX_HWIFS; ++index)
2140                 ide_unregister(index);
2141
2142 #ifdef CONFIG_BLK_DEV_IDEPNP
2143         pnpide_exit();
2144 #endif
2145
2146 #ifdef CONFIG_PROC_FS
2147         proc_ide_destroy();
2148 #endif
2149
2150         bus_unregister(&ide_bus_type);
2151 }
2152
2153 #else /* !MODULE */
2154
2155 __setup("", ide_setup);
2156
2157 module_init(ide_init);
2158
2159 #endif /* MODULE */