drivers/ide/ide.c

   1 /*
   2  *  Copyright (C) 1994-1998         Linus Torvalds & authors (see below)
   3  *  Copyrifht (C) 2003-2005, 2007   Bartlomiej Zolnierkiewicz
   4  */
   5
   6 /*
   7  *  Mostly written by Mark Lord  <mlord@pobox.com>
   8  *                and Gadi Oxman <gadio@netvision.net.il>
   9  *                and Andre Hedrick <andre@linux-ide.org>
  10  *
  11  *  See linux/MAINTAINERS for address of current maintainer.
  12  *
  13  * This is the multiple IDE interface driver, as evolved from hd.c.
  14  * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs
  15  *   (usually 14 & 15).
  16  * There can be up to two drives per interface, as per the ATA-2 spec.
  17  *
  18  * ...
  19  *
  20  *  From hd.c:
  21  *  |
  22  *  | It traverses the request-list, using interrupts to jump between functions.
  23  *  | As nearly all functions can be called within interrupts, we may not sleep.
  24  *  | Special care is recommended.  Have Fun!
  25  *  |
  26  *  | modified by Drew Eckhardt to check nr of hd's from the CMOS.
  27  *  |
  28  *  | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
  29  *  | in the early extended-partition checks and added DM partitions.
  30  *  |
  31  *  | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
  32  *  |
  33  *  | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
  34  *  | and general streamlining by Mark Lord (mlord@pobox.com).
  35  *
  36  *  October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
  37  *
  38  *      Mark Lord       (mlord@pobox.com)               (IDE Perf.Pkg)
  39  *      Delman Lee      (delman@ieee.org)               ("Mr. atdisk2")
  40  *      Scott Snyder    (snyder@fnald0.fnal.gov)        (ATAPI IDE cd-rom)
  41  *
  42  *  This was a rewrite of just about everything from hd.c, though some original
  43  *  code is still sprinkled about.  Think of it as a major evolution, with
  44  *  inspiration from lots of linux users, esp.  hamish@zot.apana.org.au
  45  */
  46
  47 #define REVISION        "Revision: 7.00alpha2"
  48
  49 #define _IDE_C                  /* Tell ide.h it's really us */
  50
  51 #include <linux/module.h>
  52 #include <linux/types.h>
  53 #include <linux/string.h>
  54 #include <linux/kernel.h>
  55 #include <linux/timer.h>
  56 #include <linux/mm.h>
  57 #include <linux/interrupt.h>
  58 #include <linux/major.h>
  59 #include <linux/errno.h>
  60 #include <linux/genhd.h>
  61 #include <linux/blkpg.h>
  62 #include <linux/slab.h>
  63 #include <linux/init.h>
  64 #include <linux/pci.h>
  65 #include <linux/delay.h>
  66 #include <linux/ide.h>
  67 #include <linux/completion.h>
  68 #include <linux/reboot.h>
  69 #include <linux/cdrom.h>
  70 #include <linux/seq_file.h>
  71 #include <linux/device.h>
  72 #include <linux/bitops.h>
  73
  74 #include <asm/byteorder.h>
  75 #include <asm/irq.h>
  76 #include <asm/uaccess.h>
  77 #include <asm/io.h>
  78
  79
  80 /* default maximum number of failures */
  81 #define IDE_DEFAULT_MAX_FAILURES        1
  82
  83 static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
  84                                         IDE2_MAJOR, IDE3_MAJOR,
  85                                         IDE4_MAJOR, IDE5_MAJOR,
  86                                         IDE6_MAJOR, IDE7_MAJOR,
  87                                         IDE8_MAJOR, IDE9_MAJOR };
  88
  89 static int idebus_parameter;    /* holds the "idebus=" parameter */
  90 static int system_bus_speed;    /* holds what we think is VESA/PCI bus speed */
  91
  92 DEFINE_MUTEX(ide_cfg_mtx);
  93  __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
  94
  95 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
  96 int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
  97 #endif
  98
  99 int noautodma = 0;
 100
 101 #ifdef CONFIG_BLK_DEV_IDEACPI
 102 int ide_noacpi = 0;
 103 int ide_noacpitfs = 1;
 104 int ide_noacpionboot = 1;
 105 #endif
 106
 107 /*
 108  * This is declared extern in ide.h, for access by other IDE modules:
 109  */
 110 ide_hwif_t ide_hwifs[MAX_HWIFS];        /* master data repository */
 111
 112 EXPORT_SYMBOL(ide_hwifs);
 113
 114 /*
 115  * Do not even *think* about calling this!
 116  */
 117 void ide_init_port_data(ide_hwif_t *hwif, unsigned int index)
 118 {
 119         unsigned int unit;
 120
 121         /* bulk initialize hwif & drive info with zeros */
 122         memset(hwif, 0, sizeof(ide_hwif_t));
 123
 124         /* fill in any non-zero initial values */
 125         hwif->index     = index;
 126         hwif->major     = ide_hwif_to_major[index];
 127
 128         hwif->name[0]   = 'i';
 129         hwif->name[1]   = 'd';
 130         hwif->name[2]   = 'e';
 131         hwif->name[3]   = '0' + index;
 132
 133         hwif->bus_state = BUSSTATE_ON;
 134
 135         init_completion(&hwif->gendev_rel_comp);
 136
 137         default_hwif_iops(hwif);
 138         default_hwif_transport(hwif);
 139         for (unit = 0; unit < MAX_DRIVES; ++unit) {
 140                 ide_drive_t *drive = &hwif->drives[unit];
 141
 142                 drive->media                    = ide_disk;
 143                 drive->select.all               = (unit<<4)|0xa0;
 144                 drive->hwif                     = hwif;
 145                 drive->ctl                      = 0x08;
 146                 drive->ready_stat               = READY_STAT;
 147                 drive->bad_wstat                = BAD_W_STAT;
 148                 drive->special.b.recalibrate    = 1;
 149                 drive->special.b.set_geometry   = 1;
 150                 drive->name[0]                  = 'h';
 151                 drive->name[1]                  = 'd';
 152                 drive->name[2]                  = 'a' + (index * MAX_DRIVES) + unit;
 153                 drive->max_failures             = IDE_DEFAULT_MAX_FAILURES;
 154                 drive->using_dma                = 0;
 155                 drive->vdma                     = 0;
 156                 INIT_LIST_HEAD(&drive->list);
 157                 init_completion(&drive->gendev_rel_comp);
 158         }
 159 }
 160 EXPORT_SYMBOL_GPL(ide_init_port_data);
 161
 162 static void init_hwif_default(ide_hwif_t *hwif, unsigned int index)
 163 {
 164         hw_regs_t hw;
 165
 166         memset(&hw, 0, sizeof(hw_regs_t));
 167
 168         ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq);
 169
 170         memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
 171
 172         hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
 173 #ifdef CONFIG_BLK_DEV_HD
 174         if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA)
 175                 hwif->noprobe = 1;      /* may be overridden by ide_setup() */
 176 #endif
 177 }
 178
 179 /*
 180  * init_ide_data() sets reasonable default values into all fields
 181  * of all instances of the hwifs and drives, but only on the first call.
 182  * Subsequent calls have no effect (they don't wipe out anything).
 183  *
 184  * This routine is normally called at driver initialization time,
 185  * but may also be called MUCH earlier during kernel "command-line"
 186  * parameter processing.  As such, we cannot depend on any other parts
 187  * of the kernel (such as memory allocation) to be functioning yet.
 188  *
 189  * This is too bad, as otherwise we could dynamically allocate the
 190  * ide_drive_t structs as needed, rather than always consuming memory
 191  * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
 192  *
 193  * FIXME: We should stuff the setup data into __init and copy the
 194  * relevant hwifs/allocate them properly during boot.
 195  */
 196 #define MAGIC_COOKIE 0x12345678
 197 static void __init init_ide_data (void)
 198 {
 199         ide_hwif_t *hwif;
 200         unsigned int index;
 201         static unsigned long magic_cookie = MAGIC_COOKIE;
 202
 203         if (magic_cookie != MAGIC_COOKIE)
 204                 return;         /* already initialized */
 205         magic_cookie = 0;
 206
 207         /* Initialise all interface structures */
 208         for (index = 0; index < MAX_HWIFS; ++index) {
 209                 hwif = &ide_hwifs[index];
 210                 ide_init_port_data(hwif, index);
 211                 init_hwif_default(hwif, index);
 212 #if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
 213                 hwif->irq =
 214                         ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
 215 #endif
 216         }
 217 }
 218
 219 /**
 220  *      ide_system_bus_speed    -       guess bus speed
 221  *
 222  *      ide_system_bus_speed() returns what we think is the system VESA/PCI
 223  *      bus speed (in MHz). This is used for calculating interface PIO timings.
 224  *      The default is 40 for known PCI systems, 50 otherwise.
 225  *      The "idebus=xx" parameter can be used to override this value.
 226  *      The actual value to be used is computed/displayed the first time
 227  *      through. Drivers should only use this as a last resort.
 228  *
 229  *      Returns a guessed speed in MHz.
 230  */
 231
 232 static int ide_system_bus_speed(void)
 233 {
 234 #ifdef CONFIG_PCI
 235         static struct pci_device_id pci_default[] = {
 236                 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
 237                 { }
 238         };
 239 #else
 240 #define pci_default 0
 241 #endif /* CONFIG_PCI */
 242
 243         /* user supplied value */
 244         if (idebus_parameter)
 245                 return idebus_parameter;
 246
 247         /* safe default value for PCI or VESA and PCI*/
 248         return pci_dev_present(pci_default) ? 33 : 50;
 249 }
 250
 251 ide_hwif_t * ide_find_port(unsigned long base)
 252 {
 253         ide_hwif_t *hwif;
 254         int i;
 255
 256         for (i = 0; i < MAX_HWIFS; i++) {
 257                 hwif = &ide_hwifs[i];
 258                 if (hwif->io_ports[IDE_DATA_OFFSET] == base)
 259                         goto found;
 260         }
 261
 262         for (i = 0; i < MAX_HWIFS; i++) {
 263                 hwif = &ide_hwifs[i];
 264                 if (hwif->io_ports[IDE_DATA_OFFSET] == 0)
 265                         goto found;
 266         }
 267
 268         hwif = NULL;
 269 found:
 270         return hwif;
 271 }
 272
 273 EXPORT_SYMBOL_GPL(ide_find_port);
 274
 275 static struct resource* hwif_request_region(ide_hwif_t *hwif,
 276                                             unsigned long addr, int num)
 277 {
 278         struct resource *res = request_region(addr, num, hwif->name);
 279
 280         if (!res)
 281                 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
 282                                 hwif->name, addr, addr+num-1);
 283         return res;
 284 }
 285
 286 /**
 287  *      ide_hwif_request_regions - request resources for IDE
 288  *      @hwif: interface to use
 289  *
 290  *      Requests all the needed resources for an interface.
 291  *      Right now core IDE code does this work which is deeply wrong.
 292  *      MMIO leaves it to the controller driver,
 293  *      PIO will migrate this way over time.
 294  */
 295
 296 int ide_hwif_request_regions(ide_hwif_t *hwif)
 297 {
 298         unsigned long addr;
 299         unsigned int i;
 300
 301         if (hwif->mmio)
 302                 return 0;
 303         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
 304         if (addr && !hwif_request_region(hwif, addr, 1))
 305                 goto control_region_busy;
 306         hwif->straight8 = 0;
 307         addr = hwif->io_ports[IDE_DATA_OFFSET];
 308         if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
 309                 if (!hwif_request_region(hwif, addr, 8))
 310                         goto data_region_busy;
 311                 hwif->straight8 = 1;
 312                 return 0;
 313         }
 314         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
 315                 addr = hwif->io_ports[i];
 316                 if (!hwif_request_region(hwif, addr, 1)) {
 317                         while (--i)
 318                                 release_region(addr, 1);
 319                         goto data_region_busy;
 320                 }
 321         }
 322         return 0;
 323
 324 data_region_busy:
 325         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
 326         if (addr)
 327                 release_region(addr, 1);
 328 control_region_busy:
 329         /* If any errors are return, we drop the hwif interface. */
 330         return -EBUSY;
 331 }
 332
 333 /**
 334  *      ide_hwif_release_regions - free IDE resources
 335  *
 336  *      Note that we only release the standard ports,
 337  *      and do not even try to handle any extra ports
 338  *      allocated for weird IDE interface chipsets.
 339  *
 340  *      Note also that we don't yet handle mmio resources here. More
 341  *      importantly our caller should be doing this so we need to
 342  *      restructure this as a helper function for drivers.
 343  */
 344
 345 void ide_hwif_release_regions(ide_hwif_t *hwif)
 346 {
 347         u32 i = 0;
 348
 349         if (hwif->mmio)
 350                 return;
 351         if (hwif->io_ports[IDE_CONTROL_OFFSET])
 352                 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
 353         if (hwif->straight8) {
 354                 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
 355                 return;
 356         }
 357         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
 358                 if (hwif->io_ports[i])
 359                         release_region(hwif->io_ports[i], 1);
 360 }
 361
 362 /**
 363  *      ide_hwif_restore        -       restore hwif to template
 364  *      @hwif: hwif to update
 365  *      @tmp_hwif: template
 366  *
 367  *      Restore hwif to a previous state by copying most settings
 368  *      from the template.
 369  */
 370
 371 static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
 372 {
 373         hwif->hwgroup                   = tmp_hwif->hwgroup;
 374
 375         hwif->gendev.parent             = tmp_hwif->gendev.parent;
 376
 377         hwif->proc                      = tmp_hwif->proc;
 378
 379         hwif->major                     = tmp_hwif->major;
 380         hwif->straight8                 = tmp_hwif->straight8;
 381         hwif->bus_state                 = tmp_hwif->bus_state;
 382
 383         hwif->host_flags                = tmp_hwif->host_flags;
 384
 385         hwif->pio_mask                  = tmp_hwif->pio_mask;
 386
 387         hwif->ultra_mask                = tmp_hwif->ultra_mask;
 388         hwif->mwdma_mask                = tmp_hwif->mwdma_mask;
 389         hwif->swdma_mask                = tmp_hwif->swdma_mask;
 390
 391         hwif->cbl                       = tmp_hwif->cbl;
 392
 393         hwif->chipset                   = tmp_hwif->chipset;
 394         hwif->hold                      = tmp_hwif->hold;
 395
 396         hwif->dev                       = tmp_hwif->dev;
 397
 398 #ifdef CONFIG_BLK_DEV_IDEPCI
 399         hwif->cds                       = tmp_hwif->cds;
 400 #endif
 401
 402         hwif->set_pio_mode              = tmp_hwif->set_pio_mode;
 403         hwif->set_dma_mode              = tmp_hwif->set_dma_mode;
 404         hwif->mdma_filter               = tmp_hwif->mdma_filter;
 405         hwif->udma_filter               = tmp_hwif->udma_filter;
 406         hwif->selectproc                = tmp_hwif->selectproc;
 407         hwif->reset_poll                = tmp_hwif->reset_poll;
 408         hwif->pre_reset                 = tmp_hwif->pre_reset;
 409         hwif->resetproc                 = tmp_hwif->resetproc;
 410         hwif->maskproc                  = tmp_hwif->maskproc;
 411         hwif->quirkproc                 = tmp_hwif->quirkproc;
 412         hwif->busproc                   = tmp_hwif->busproc;
 413
 414         hwif->ata_input_data            = tmp_hwif->ata_input_data;
 415         hwif->ata_output_data           = tmp_hwif->ata_output_data;
 416         hwif->atapi_input_bytes         = tmp_hwif->atapi_input_bytes;
 417         hwif->atapi_output_bytes        = tmp_hwif->atapi_output_bytes;
 418
 419         hwif->dma_host_set              = tmp_hwif->dma_host_set;
 420         hwif->dma_setup                 = tmp_hwif->dma_setup;
 421         hwif->dma_exec_cmd              = tmp_hwif->dma_exec_cmd;
 422         hwif->dma_start                 = tmp_hwif->dma_start;
 423         hwif->ide_dma_end               = tmp_hwif->ide_dma_end;
 424         hwif->ide_dma_test_irq          = tmp_hwif->ide_dma_test_irq;
 425         hwif->ide_dma_clear_irq         = tmp_hwif->ide_dma_clear_irq;
 426         hwif->dma_lost_irq              = tmp_hwif->dma_lost_irq;
 427         hwif->dma_timeout               = tmp_hwif->dma_timeout;
 428
 429         hwif->OUTB                      = tmp_hwif->OUTB;
 430         hwif->OUTBSYNC                  = tmp_hwif->OUTBSYNC;
 431         hwif->OUTW                      = tmp_hwif->OUTW;
 432         hwif->OUTSW                     = tmp_hwif->OUTSW;
 433         hwif->OUTSL                     = tmp_hwif->OUTSL;
 434
 435         hwif->INB                       = tmp_hwif->INB;
 436         hwif->INW                       = tmp_hwif->INW;
 437         hwif->INSW                      = tmp_hwif->INSW;
 438         hwif->INSL                      = tmp_hwif->INSL;
 439
 440         hwif->sg_max_nents              = tmp_hwif->sg_max_nents;
 441
 442         hwif->mmio                      = tmp_hwif->mmio;
 443         hwif->rqsize                    = tmp_hwif->rqsize;
 444
 445 #ifndef CONFIG_BLK_DEV_IDECS
 446         hwif->irq                       = tmp_hwif->irq;
 447 #endif
 448
 449         hwif->dma_base                  = tmp_hwif->dma_base;
 450         hwif->dma_command               = tmp_hwif->dma_command;
 451         hwif->dma_vendor1               = tmp_hwif->dma_vendor1;
 452         hwif->dma_status                = tmp_hwif->dma_status;
 453         hwif->dma_vendor3               = tmp_hwif->dma_vendor3;
 454         hwif->dma_prdtable              = tmp_hwif->dma_prdtable;
 455
 456         hwif->config_data               = tmp_hwif->config_data;
 457         hwif->select_data               = tmp_hwif->select_data;
 458         hwif->extra_base                = tmp_hwif->extra_base;
 459         hwif->extra_ports               = tmp_hwif->extra_ports;
 460
 461         hwif->hwif_data                 = tmp_hwif->hwif_data;
 462 }
 463
 464 void ide_remove_port_from_hwgroup(ide_hwif_t *hwif)
 465 {
 466         ide_hwgroup_t *hwgroup = hwif->hwgroup;
 467
 468         spin_lock_irq(&ide_lock);
 469         /*
 470          * Remove us from the hwgroup, and free
 471          * the hwgroup if we were the only member
 472          */
 473         if (hwif->next == hwif) {
 474                 BUG_ON(hwgroup->hwif != hwif);
 475                 kfree(hwgroup);
 476         } else {
 477                 /* There is another interface in hwgroup.
 478                  * Unlink us, and set hwgroup->drive and ->hwif to
 479                  * something sane.
 480                  */
 481                 ide_hwif_t *g = hwgroup->hwif;
 482
 483                 while (g->next != hwif)
 484                         g = g->next;
 485                 g->next = hwif->next;
 486                 if (hwgroup->hwif == hwif) {
 487                         /* Chose a random hwif for hwgroup->hwif.
 488                          * It's guaranteed that there are no drives
 489                          * left in the hwgroup.
 490                          */
 491                         BUG_ON(hwgroup->drive != NULL);
 492                         hwgroup->hwif = g;
 493                 }
 494                 BUG_ON(hwgroup->hwif == hwif);
 495         }
 496         spin_unlock_irq(&ide_lock);
 497 }
 498
 499 /**
 500  *      ide_unregister          -       free an IDE interface
 501  *      @index: index of interface (will change soon to a pointer)
 502  *      @init_default: init default hwif flag
 503  *      @restore: restore hwif flag
 504  *
 505  *      Perform the final unregister of an IDE interface. At the moment
 506  *      we don't refcount interfaces so this will also get split up.
 507  *
 508  *      Locking:
 509  *      The caller must not hold the IDE locks
 510  *      The drive present/vanishing is not yet properly locked
 511  *      Take care with the callbacks. These have been split to avoid
 512  *      deadlocking the IDE layer. The shutdown callback is called
 513  *      before we take the lock and free resources. It is up to the
 514  *      caller to be sure there is no pending I/O here, and that
 515  *      the interface will not be reopened (present/vanishing locking
 516  *      isn't yet done BTW). After we commit to the final kill we
 517  *      call the cleanup callback with the ide locks held.
 518  *
 519  *      Unregister restores the hwif structures to the default state.
 520  *      This is raving bonkers.
 521  */
 522
 523 void ide_unregister(unsigned int index, int init_default, int restore)
 524 {
 525         ide_drive_t *drive;
 526         ide_hwif_t *hwif, *g;
 527         static ide_hwif_t tmp_hwif; /* protected by ide_cfg_mtx */
 528         ide_hwgroup_t *hwgroup;
 529         int irq_count = 0, unit;
 530
 531         BUG_ON(index >= MAX_HWIFS);
 532
 533         BUG_ON(in_interrupt());
 534         BUG_ON(irqs_disabled());
 535         mutex_lock(&ide_cfg_mtx);
 536         spin_lock_irq(&ide_lock);
 537         hwif = &ide_hwifs[index];
 538         if (!hwif->present)
 539                 goto abort;
 540         for (unit = 0; unit < MAX_DRIVES; ++unit) {
 541                 drive = &hwif->drives[unit];
 542                 if (!drive->present)
 543                         continue;
 544                 spin_unlock_irq(&ide_lock);
 545                 device_unregister(&drive->gendev);
 546                 wait_for_completion(&drive->gendev_rel_comp);
 547                 spin_lock_irq(&ide_lock);
 548         }
 549         hwif->present = 0;
 550
 551         spin_unlock_irq(&ide_lock);
 552
 553         ide_proc_unregister_port(hwif);
 554
 555         hwgroup = hwif->hwgroup;
 556         /*
 557          * free the irq if we were the only hwif using it
 558          */
 559         g = hwgroup->hwif;
 560         do {
 561                 if (g->irq == hwif->irq)
 562                         ++irq_count;
 563                 g = g->next;
 564         } while (g != hwgroup->hwif);
 565         if (irq_count == 1)
 566                 free_irq(hwif->irq, hwgroup);
 567
 568         ide_remove_port_from_hwgroup(hwif);
 569
 570         device_unregister(&hwif->gendev);
 571         wait_for_completion(&hwif->gendev_rel_comp);
 572
 573         /*
 574          * Remove us from the kernel's knowledge
 575          */
 576         blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
 577         kfree(hwif->sg_table);
 578         unregister_blkdev(hwif->major, hwif->name);
 579         spin_lock_irq(&ide_lock);
 580
 581         if (hwif->dma_base) {
 582                 (void) ide_release_dma(hwif);
 583
 584                 hwif->dma_base = 0;
 585                 hwif->dma_command = 0;
 586                 hwif->dma_vendor1 = 0;
 587                 hwif->dma_status = 0;
 588                 hwif->dma_vendor3 = 0;
 589                 hwif->dma_prdtable = 0;
 590
 591                 hwif->extra_base  = 0;
 592                 hwif->extra_ports = 0;
 593         }
 594
 595         /*
 596          * Note that we only release the standard ports,
 597          * and do not even try to handle any extra ports
 598          * allocated for weird IDE interface chipsets.
 599          */
 600         ide_hwif_release_regions(hwif);
 601
 602         /* copy original settings */
 603         tmp_hwif = *hwif;
 604
 605         /* restore hwif data to pristine status */
 606         ide_init_port_data(hwif, index);
 607
 608         if (init_default)
 609                 init_hwif_default(hwif, index);
 610
 611         if (restore)
 612                 ide_hwif_restore(hwif, &tmp_hwif);
 613
 614 abort:
 615         spin_unlock_irq(&ide_lock);
 616         mutex_unlock(&ide_cfg_mtx);
 617 }
 618
 619 EXPORT_SYMBOL(ide_unregister);
 620
 621
 622 /**
 623  *      ide_setup_ports         -       set up IDE interface ports
 624  *      @hw: register descriptions
 625  *      @base: base register
 626  *      @offsets: table of register offsets
 627  *      @ctrl: control register
 628  *      @ack_irq: IRQ ack
 629  *      @irq: interrupt lie
 630  *
 631  *      Setup hw_regs_t structure described by parameters.  You
 632  *      may set up the hw structure yourself OR use this routine to
 633  *      do it for you. This is basically a helper
 634  *
 635  */
 636
 637 void ide_setup_ports (  hw_regs_t *hw,
 638                         unsigned long base, int *offsets,
 639                         unsigned long ctrl, unsigned long intr,
 640                         ide_ack_intr_t *ack_intr,
 641 /*
 642  *                      ide_io_ops_t *iops,
 643  */
 644                         int irq)
 645 {
 646         int i;
 647
 648         memset(hw, 0, sizeof(hw_regs_t));
 649         for (i = 0; i < IDE_NR_PORTS; i++) {
 650                 if (offsets[i] == -1) {
 651                         switch(i) {
 652                                 case IDE_CONTROL_OFFSET:
 653                                         hw->io_ports[i] = ctrl;
 654                                         break;
 655 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
 656                                 case IDE_IRQ_OFFSET:
 657                                         hw->io_ports[i] = intr;
 658                                         break;
 659 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
 660                                 default:
 661                                         hw->io_ports[i] = 0;
 662                                         break;
 663                         }
 664                 } else {
 665                         hw->io_ports[i] = base + offsets[i];
 666                 }
 667         }
 668         hw->irq = irq;
 669         hw->ack_intr = ack_intr;
 670 /*
 671  *      hw->iops = iops;
 672  */
 673 }
 674
 675 void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw)
 676 {
 677         memcpy(hwif->io_ports, hw->io_ports, sizeof(hwif->io_ports));
 678         hwif->irq = hw->irq;
 679         hwif->noprobe = 0;
 680         hwif->chipset = hw->chipset;
 681         hwif->gendev.parent = hw->dev;
 682         hwif->ack_intr = hw->ack_intr;
 683 }
 684 EXPORT_SYMBOL_GPL(ide_init_port_hw);
 685
 686 ide_hwif_t *ide_deprecated_find_port(unsigned long base)
 687 {
 688         ide_hwif_t *hwif;
 689         int i;
 690
 691         for (i = 0; i < MAX_HWIFS; i++) {
 692                 hwif = &ide_hwifs[i];
 693                 if (hwif->io_ports[IDE_DATA_OFFSET] == base)
 694                         goto found;
 695         }
 696
 697         for (i = 0; i < MAX_HWIFS; i++) {
 698                 hwif = &ide_hwifs[i];
 699                 if (hwif->hold)
 700                         continue;
 701                 if (!hwif->present && hwif->mate == NULL)
 702                         goto found;
 703         }
 704
 705         hwif = NULL;
 706 found:
 707         return hwif;
 708 }
 709 EXPORT_SYMBOL_GPL(ide_deprecated_find_port);
 710
 711 /**
 712  *      ide_register_hw         -       register IDE interface
 713  *      @hw: hardware registers
 714  *      @quirkproc: quirkproc function
 715  *      @hwifp: pointer to returned hwif
 716  *
 717  *      Register an IDE interface, specifying exactly the registers etc.
 718  *
 719  *      Returns -1 on error.
 720  */
 721
 722 int ide_register_hw(hw_regs_t *hw, void (*quirkproc)(ide_drive_t *),
 723                     ide_hwif_t **hwifp)
 724 {
 725         int index, retry = 1;
 726         ide_hwif_t *hwif;
 727         u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
 728
 729         do {
 730                 hwif = ide_deprecated_find_port(hw->io_ports[IDE_DATA_OFFSET]);
 731                 index = hwif->index;
 732                 if (hwif)
 733                         goto found;
 734                 for (index = 0; index < MAX_HWIFS; index++)
 735                         ide_unregister(index, 1, 1);
 736         } while (retry--);
 737         return -1;
 738 found:
 739         if (hwif->present)
 740                 ide_unregister(index, 0, 1);
 741         else if (!hwif->hold)
 742                 ide_init_port_data(hwif, index);
 743
 744         ide_init_port_hw(hwif, hw);
 745         hwif->quirkproc = quirkproc;
 746
 747         idx[0] = index;
 748
 749         ide_device_add(idx, NULL);
 750
 751         if (hwifp)
 752                 *hwifp = hwif;
 753
 754         return hwif->present ? index : -1;
 755 }
 756
 757 EXPORT_SYMBOL(ide_register_hw);
 758
 759 /*
 760  *      Locks for IDE setting functionality
 761  */
 762
 763 DEFINE_MUTEX(ide_setting_mtx);
 764
 765 EXPORT_SYMBOL_GPL(ide_setting_mtx);
 766
 767 /**
 768  *      ide_spin_wait_hwgroup   -       wait for group
 769  *      @drive: drive in the group
 770  *
 771  *      Wait for an IDE device group to go non busy and then return
 772  *      holding the ide_lock which guards the hwgroup->busy status
 773  *      and right to use it.
 774  */
 775
 776 int ide_spin_wait_hwgroup (ide_drive_t *drive)
 777 {
 778         ide_hwgroup_t *hwgroup = HWGROUP(drive);
 779         unsigned long timeout = jiffies + (3 * HZ);
 780
 781         spin_lock_irq(&ide_lock);
 782
 783         while (hwgroup->busy) {
 784                 unsigned long lflags;
 785                 spin_unlock_irq(&ide_lock);
 786                 local_irq_set(lflags);
 787                 if (time_after(jiffies, timeout)) {
 788                         local_irq_restore(lflags);
 789                         printk(KERN_ERR "%s: channel busy\n", drive->name);
 790                         return -EBUSY;
 791                 }
 792                 local_irq_restore(lflags);
 793                 spin_lock_irq(&ide_lock);
 794         }
 795         return 0;
 796 }
 797
 798 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
 799
 800 int set_io_32bit(ide_drive_t *drive, int arg)
 801 {
 802         if (drive->no_io_32bit)
 803                 return -EPERM;
 804
 805         if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
 806                 return -EINVAL;
 807
 808         if (ide_spin_wait_hwgroup(drive))
 809                 return -EBUSY;
 810
 811         drive->io_32bit = arg;
 812
 813         spin_unlock_irq(&ide_lock);
 814
 815         return 0;
 816 }
 817
 818 static int set_ksettings(ide_drive_t *drive, int arg)
 819 {
 820         if (arg < 0 || arg > 1)
 821                 return -EINVAL;
 822
 823         if (ide_spin_wait_hwgroup(drive))
 824                 return -EBUSY;
 825         drive->keep_settings = arg;
 826         spin_unlock_irq(&ide_lock);
 827
 828         return 0;
 829 }
 830
 831 int set_using_dma(ide_drive_t *drive, int arg)
 832 {
 833 #ifdef CONFIG_BLK_DEV_IDEDMA
 834         ide_hwif_t *hwif = drive->hwif;
 835         int err = -EPERM;
 836
 837         if (arg < 0 || arg > 1)
 838                 return -EINVAL;
 839
 840         if (!drive->id || !(drive->id->capability & 1))
 841                 goto out;
 842
 843         if (hwif->dma_host_set == NULL)
 844                 goto out;
 845
 846         err = -EBUSY;
 847         if (ide_spin_wait_hwgroup(drive))
 848                 goto out;
 849         /*
 850          * set ->busy flag, unlock and let it ride
 851          */
 852         hwif->hwgroup->busy = 1;
 853         spin_unlock_irq(&ide_lock);
 854
 855         err = 0;
 856
 857         if (arg) {
 858                 if (ide_set_dma(drive))
 859                         err = -EIO;
 860         } else
 861                 ide_dma_off(drive);
 862
 863         /*
 864          * lock, clear ->busy flag and unlock before leaving
 865          */
 866         spin_lock_irq(&ide_lock);
 867         hwif->hwgroup->busy = 0;
 868         spin_unlock_irq(&ide_lock);
 869 out:
 870         return err;
 871 #else
 872         if (arg < 0 || arg > 1)
 873                 return -EINVAL;
 874
 875         return -EPERM;
 876 #endif
 877 }
 878
 879 int set_pio_mode(ide_drive_t *drive, int arg)
 880 {
 881         struct request rq;
 882
 883         if (arg < 0 || arg > 255)
 884                 return -EINVAL;
 885
 886         if (drive->hwif->set_pio_mode == NULL)
 887                 return -ENOSYS;
 888
 889         if (drive->special.b.set_tune)
 890                 return -EBUSY;
 891
 892         ide_init_drive_cmd(&rq);
 893         rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
 894
 895         drive->tune_req = (u8) arg;
 896         drive->special.b.set_tune = 1;
 897         (void) ide_do_drive_cmd(drive, &rq, ide_wait);
 898         return 0;
 899 }
 900
 901 static int set_unmaskirq(ide_drive_t *drive, int arg)
 902 {
 903         if (drive->no_unmask)
 904                 return -EPERM;
 905
 906         if (arg < 0 || arg > 1)
 907                 return -EINVAL;
 908
 909         if (ide_spin_wait_hwgroup(drive))
 910                 return -EBUSY;
 911         drive->unmask = arg;
 912         spin_unlock_irq(&ide_lock);
 913
 914         return 0;
 915 }
 916
 917 /**
 918  *      system_bus_clock        -       clock guess
 919  *
 920  *      External version of the bus clock guess used by very old IDE drivers
 921  *      for things like VLB timings. Should not be used.
 922  */
 923
 924 int system_bus_clock (void)
 925 {
 926         return system_bus_speed;
 927 }
 928
 929 EXPORT_SYMBOL(system_bus_clock);
 930
 931 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
 932 {
 933         ide_drive_t *drive = dev->driver_data;
 934         ide_hwif_t *hwif = HWIF(drive);
 935         struct request rq;
 936         struct request_pm_state rqpm;
 937         ide_task_t args;
 938         int ret;
 939
 940         /* Call ACPI _GTM only once */
 941         if (!(drive->dn % 2))
 942                 ide_acpi_get_timing(hwif);
 943
 944         memset(&rq, 0, sizeof(rq));
 945         memset(&rqpm, 0, sizeof(rqpm));
 946         memset(&args, 0, sizeof(args));
 947         rq.cmd_type = REQ_TYPE_PM_SUSPEND;
 948         rq.special = &args;
 949         rq.data = &rqpm;
 950         rqpm.pm_step = ide_pm_state_start_suspend;
 951         if (mesg.event == PM_EVENT_PRETHAW)
 952                 mesg.event = PM_EVENT_FREEZE;
 953         rqpm.pm_state = mesg.event;
 954
 955         ret = ide_do_drive_cmd(drive, &rq, ide_wait);
 956         /* only call ACPI _PS3 after both drivers are suspended */
 957         if (!ret && (((drive->dn % 2) && hwif->drives[0].present
 958                  && hwif->drives[1].present)
 959                  || !hwif->drives[0].present
 960                  || !hwif->drives[1].present))
 961                 ide_acpi_set_state(hwif, 0);
 962         return ret;
 963 }
 964
 965 static int generic_ide_resume(struct device *dev)
 966 {
 967         ide_drive_t *drive = dev->driver_data;
 968         ide_hwif_t *hwif = HWIF(drive);
 969         struct request rq;
 970         struct request_pm_state rqpm;
 971         ide_task_t args;
 972         int err;
 973
 974         /* Call ACPI _STM only once */
 975         if (!(drive->dn % 2)) {
 976                 ide_acpi_set_state(hwif, 1);
 977                 ide_acpi_push_timing(hwif);
 978         }
 979
 980         ide_acpi_exec_tfs(drive);
 981
 982         memset(&rq, 0, sizeof(rq));
 983         memset(&rqpm, 0, sizeof(rqpm));
 984         memset(&args, 0, sizeof(args));
 985         rq.cmd_type = REQ_TYPE_PM_RESUME;
 986         rq.special = &args;
 987         rq.data = &rqpm;
 988         rqpm.pm_step = ide_pm_state_start_resume;
 989         rqpm.pm_state = PM_EVENT_ON;
 990
 991         err = ide_do_drive_cmd(drive, &rq, ide_head_wait);
 992
 993         if (err == 0 && dev->driver) {
 994                 ide_driver_t *drv = to_ide_driver(dev->driver);
 995
 996                 if (drv->resume)
 997                         drv->resume(drive);
 998         }
 999
1000         return err;
1001 }
1002
1003 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
1004                         unsigned int cmd, unsigned long arg)
1005 {
1006         unsigned long flags;
1007         ide_driver_t *drv;
1008         void __user *p = (void __user *)arg;
1009         int err = 0, (*setfunc)(ide_drive_t *, int);
1010         u8 *val;
1011
1012         switch (cmd) {
1013         case HDIO_GET_32BIT:        val = &drive->io_32bit;      goto read_val;
1014         case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
1015         case HDIO_GET_UNMASKINTR:   val = &drive->unmask;        goto read_val;
1016         case HDIO_GET_DMA:          val = &drive->using_dma;     goto read_val;
1017         case HDIO_SET_32BIT:        setfunc = set_io_32bit;      goto set_val;
1018         case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings;     goto set_val;
1019         case HDIO_SET_PIO_MODE:     setfunc = set_pio_mode;      goto set_val;
1020         case HDIO_SET_UNMASKINTR:   setfunc = set_unmaskirq;     goto set_val;
1021         case HDIO_SET_DMA:          setfunc = set_using_dma;     goto set_val;
1022         }
1023
1024         switch (cmd) {
1025                 case HDIO_OBSOLETE_IDENTITY:
1026                 case HDIO_GET_IDENTITY:
1027                         if (bdev != bdev->bd_contains)
1028                                 return -EINVAL;
1029                         if (drive->id_read == 0)
1030                                 return -ENOMSG;
1031                         if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1032                                 return -EFAULT;
1033                         return 0;
1034
1035                 case HDIO_GET_NICE:
1036                         return put_user(drive->dsc_overlap      <<      IDE_NICE_DSC_OVERLAP    |
1037                                         drive->atapi_overlap    <<      IDE_NICE_ATAPI_OVERLAP  |
1038                                         drive->nice1 << IDE_NICE_1,
1039                                         (long __user *) arg);
1040 #ifdef CONFIG_IDE_TASK_IOCTL
1041                 case HDIO_DRIVE_TASKFILE:
1042                         if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1043                                 return -EACCES;
1044                         switch(drive->media) {
1045                                 case ide_disk:
1046                                         return ide_taskfile_ioctl(drive, cmd, arg);
1047                                 default:
1048                                         return -ENOMSG;
1049                         }
1050 #endif /* CONFIG_IDE_TASK_IOCTL */
1051
1052                 case HDIO_DRIVE_CMD:
1053                         if (!capable(CAP_SYS_RAWIO))
1054                                 return -EACCES;
1055                         return ide_cmd_ioctl(drive, cmd, arg);
1056
1057                 case HDIO_DRIVE_TASK:
1058                         if (!capable(CAP_SYS_RAWIO))
1059                                 return -EACCES;
1060                         return ide_task_ioctl(drive, cmd, arg);
1061
1062                 case HDIO_SCAN_HWIF:
1063                 {
1064                         hw_regs_t hw;
1065                         int args[3];
1066                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1067                         if (copy_from_user(args, p, 3 * sizeof(int)))
1068                                 return -EFAULT;
1069                         memset(&hw, 0, sizeof(hw));
1070                         ide_init_hwif_ports(&hw, (unsigned long) args[0],
1071                                             (unsigned long) args[1], NULL);
1072                         hw.irq = args[2];
1073                         if (ide_register_hw(&hw, NULL, NULL) == -1)
1074                                 return -EIO;
1075                         return 0;
1076                 }
1077                 case HDIO_UNREGISTER_HWIF:
1078                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1079                         /* (arg > MAX_HWIFS) checked in function */
1080                         ide_unregister(arg, 1, 1);
1081                         return 0;
1082                 case HDIO_SET_NICE:
1083                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1084                         if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1085                                 return -EPERM;
1086                         drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1087                         drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1088                         if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1089                                 drive->dsc_overlap = 0;
1090                                 return -EPERM;
1091                         }
1092                         drive->nice1 = (arg >> IDE_NICE_1) & 1;
1093                         return 0;
1094                 case HDIO_DRIVE_RESET:
1095                 {
1096                         unsigned long flags;
1097                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1098
1099                         /*
1100                          *      Abort the current command on the
1101                          *      group if there is one, taking
1102                          *      care not to allow anything else
1103                          *      to be queued and to die on the
1104                          *      spot if we miss one somehow
1105                          */
1106
1107                         spin_lock_irqsave(&ide_lock, flags);
1108
1109                         if (HWGROUP(drive)->resetting) {
1110                                 spin_unlock_irqrestore(&ide_lock, flags);
1111                                 return -EBUSY;
1112                         }
1113
1114                         ide_abort(drive, "drive reset");
1115
1116                         BUG_ON(HWGROUP(drive)->handler);
1117
1118                         /* Ensure nothing gets queued after we
1119                            drop the lock. Reset will clear the busy */
1120
1121                         HWGROUP(drive)->busy = 1;
1122                         spin_unlock_irqrestore(&ide_lock, flags);
1123                         (void) ide_do_reset(drive);
1124
1125                         return 0;
1126                 }
1127
1128                 case HDIO_GET_BUSSTATE:
1129                         if (!capable(CAP_SYS_ADMIN))
1130                                 return -EACCES;
1131                         if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1132                                 return -EFAULT;
1133                         return 0;
1134
1135                 case HDIO_SET_BUSSTATE:
1136                         if (!capable(CAP_SYS_ADMIN))
1137                                 return -EACCES;
1138                         if (HWIF(drive)->busproc)
1139                                 return HWIF(drive)->busproc(drive, (int)arg);
1140                         return -EOPNOTSUPP;
1141                 default:
1142                         return -EINVAL;
1143         }
1144
1145 read_val:
1146         mutex_lock(&ide_setting_mtx);
1147         spin_lock_irqsave(&ide_lock, flags);
1148         err = *val;
1149         spin_unlock_irqrestore(&ide_lock, flags);
1150         mutex_unlock(&ide_setting_mtx);
1151         return err >= 0 ? put_user(err, (long __user *)arg) : err;
1152
1153 set_val:
1154         if (bdev != bdev->bd_contains)
1155                 err = -EINVAL;
1156         else {
1157                 if (!capable(CAP_SYS_ADMIN))
1158                         err = -EACCES;
1159                 else {
1160                         mutex_lock(&ide_setting_mtx);
1161                         err = setfunc(drive, arg);
1162                         mutex_unlock(&ide_setting_mtx);
1163                 }
1164         }
1165         return err;
1166 }
1167
1168 EXPORT_SYMBOL(generic_ide_ioctl);
1169
1170 /*
1171  * stridx() returns the offset of c within s,
1172  * or -1 if c is '\0' or not found within s.
1173  */
1174 static int __init stridx (const char *s, char c)
1175 {
1176         char *i = strchr(s, c);
1177         return (i && c) ? i - s : -1;
1178 }
1179
1180 /*
1181  * match_parm() does parsing for ide_setup():
1182  *
1183  * 1. the first char of s must be '='.
1184  * 2. if the remainder matches one of the supplied keywords,
1185  *     the index (1 based) of the keyword is negated and returned.
1186  * 3. if the remainder is a series of no more than max_vals numbers
1187  *     separated by commas, the numbers are saved in vals[] and a
1188  *     count of how many were saved is returned.  Base10 is assumed,
1189  *     and base16 is allowed when prefixed with "0x".
1190  * 4. otherwise, zero is returned.
1191  */
1192 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1193 {
1194         static const char *decimal = "0123456789";
1195         static const char *hex = "0123456789abcdef";
1196         int i, n;
1197
1198         if (*s++ == '=') {
1199                 /*
1200                  * Try matching against the supplied keywords,
1201                  * and return -(index+1) if we match one
1202                  */
1203                 if (keywords != NULL) {
1204                         for (i = 0; *keywords != NULL; ++i) {
1205                                 if (!strcmp(s, *keywords++))
1206                                         return -(i+1);
1207                         }
1208                 }
1209                 /*
1210                  * Look for a series of no more than "max_vals"
1211                  * numeric values separated by commas, in base10,
1212                  * or base16 when prefixed with "0x".
1213                  * Return a count of how many were found.
1214                  */
1215                 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1216                         vals[n] = i;
1217                         while ((i = stridx(decimal, *++s)) >= 0)
1218                                 vals[n] = (vals[n] * 10) + i;
1219                         if (*s == 'x' && !vals[n]) {
1220                                 while ((i = stridx(hex, *++s)) >= 0)
1221                                         vals[n] = (vals[n] * 0x10) + i;
1222                         }
1223                         if (++n == max_vals)
1224                                 break;
1225                         if (*s == ',' || *s == ';')
1226                                 ++s;
1227                 }
1228                 if (!*s)
1229                         return n;
1230         }
1231         return 0;       /* zero = nothing matched */
1232 }
1233
1234 extern int probe_ali14xx;
1235 extern int probe_umc8672;
1236 extern int probe_dtc2278;
1237 extern int probe_ht6560b;
1238 extern int probe_qd65xx;
1239 extern int cmd640_vlb;
1240
1241 static int __initdata is_chipset_set[MAX_HWIFS];
1242
1243 /*
1244  * ide_setup() gets called VERY EARLY during initialization,
1245  * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1246  *
1247  * Remember to update Documentation/ide.txt if you change something here.
1248  */
1249 static int __init ide_setup(char *s)
1250 {
1251         int i, vals[3];
1252         ide_hwif_t *hwif;
1253         ide_drive_t *drive;
1254         unsigned int hw, unit;
1255         const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1256         const char max_hwif  = '0' + (MAX_HWIFS - 1);
1257
1258
1259         if (strncmp(s,"hd",2) == 0 && s[2] == '=')      /* hd= is for hd.c   */
1260                 return 0;                               /* driver and not us */
1261
1262         if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1263                 return 0;
1264
1265         printk(KERN_INFO "ide_setup: %s", s);
1266         init_ide_data ();
1267
1268 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1269         if (!strcmp(s, "ide=doubler")) {
1270                 extern int ide_doubler;
1271
1272                 printk(" : Enabled support for IDE doublers\n");
1273                 ide_doubler = 1;
1274                 return 1;
1275         }
1276 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1277
1278         if (!strcmp(s, "ide=nodma")) {
1279                 printk(" : Prevented DMA\n");
1280                 noautodma = 1;
1281                 goto obsolete_option;
1282         }
1283
1284 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1285         if (!strcmp(s, "ide=reverse")) {
1286                 ide_scan_direction = 1;
1287                 printk(" : Enabled support for IDE inverse scan order.\n");
1288                 return 1;
1289         }
1290 #endif
1291
1292 #ifdef CONFIG_BLK_DEV_IDEACPI
1293         if (!strcmp(s, "ide=noacpi")) {
1294                 //printk(" : Disable IDE ACPI support.\n");
1295                 ide_noacpi = 1;
1296                 return 1;
1297         }
1298         if (!strcmp(s, "ide=acpigtf")) {
1299                 //printk(" : Enable IDE ACPI _GTF support.\n");
1300                 ide_noacpitfs = 0;
1301                 return 1;
1302         }
1303         if (!strcmp(s, "ide=acpionboot")) {
1304                 //printk(" : Call IDE ACPI methods on boot.\n");
1305                 ide_noacpionboot = 0;
1306                 return 1;
1307         }
1308 #endif /* CONFIG_BLK_DEV_IDEACPI */
1309
1310         /*
1311          * Look for drive options:  "hdx="
1312          */
1313         if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1314                 const char *hd_words[] = {
1315                         "none", "noprobe", "nowerr", "cdrom", "nodma",
1316                         "autotune", "noautotune", "-8", "-9", "-10",
1317                         "noflush", "remap", "remap63", "scsi", NULL };
1318                 unit = s[2] - 'a';
1319                 hw   = unit / MAX_DRIVES;
1320                 unit = unit % MAX_DRIVES;
1321                 hwif = &ide_hwifs[hw];
1322                 drive = &hwif->drives[unit];
1323                 if (strncmp(s + 4, "ide-", 4) == 0) {
1324                         strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1325                         goto done;
1326                 }
1327                 switch (match_parm(&s[3], hd_words, vals, 3)) {
1328                         case -1: /* "none" */
1329                         case -2: /* "noprobe" */
1330                                 drive->noprobe = 1;
1331                                 goto done;
1332                         case -3: /* "nowerr" */
1333                                 drive->bad_wstat = BAD_R_STAT;
1334                                 hwif->noprobe = 0;
1335                                 goto done;
1336                         case -4: /* "cdrom" */
1337                                 drive->present = 1;
1338                                 drive->media = ide_cdrom;
1339                                 /* an ATAPI device ignores DRDY */
1340                                 drive->ready_stat = 0;
1341                                 hwif->noprobe = 0;
1342                                 goto done;
1343                         case -5: /* nodma */
1344                                 drive->nodma = 1;
1345                                 goto done;
1346                         case -6: /* "autotune" */
1347                                 drive->autotune = IDE_TUNE_AUTO;
1348                                 goto obsolete_option;
1349                         case -7: /* "noautotune" */
1350                                 drive->autotune = IDE_TUNE_NOAUTO;
1351                                 goto obsolete_option;
1352                         case -11: /* noflush */
1353                                 drive->noflush = 1;
1354                                 goto done;
1355                         case -12: /* "remap" */
1356                                 drive->remap_0_to_1 = 1;
1357                                 goto done;
1358                         case -13: /* "remap63" */
1359                                 drive->sect0 = 63;
1360                                 goto done;
1361                         case -14: /* "scsi" */
1362                                 drive->scsi = 1;
1363                                 goto done;
1364                         case 3: /* cyl,head,sect */
1365                                 drive->media    = ide_disk;
1366                                 drive->ready_stat = READY_STAT;
1367                                 drive->cyl      = drive->bios_cyl  = vals[0];
1368                                 drive->head     = drive->bios_head = vals[1];
1369                                 drive->sect     = drive->bios_sect = vals[2];
1370                                 drive->present  = 1;
1371                                 drive->forced_geom = 1;
1372                                 hwif->noprobe = 0;
1373                                 goto done;
1374                         default:
1375                                 goto bad_option;
1376                 }
1377         }
1378
1379         if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1380                 goto bad_option;
1381         /*
1382          * Look for bus speed option:  "idebus="
1383          */
1384         if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1385                 if (match_parm(&s[6], NULL, vals, 1) != 1)
1386                         goto bad_option;
1387                 if (vals[0] >= 20 && vals[0] <= 66) {
1388                         idebus_parameter = vals[0];
1389                 } else
1390                         printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1391                 goto done;
1392         }
1393         /*
1394          * Look for interface options:  "idex="
1395          */
1396         if (s[3] >= '0' && s[3] <= max_hwif) {
1397                 /*
1398                  * Be VERY CAREFUL changing this: note hardcoded indexes below
1399                  * (-8, -9, -10) are reserved to ease the hardcoding.
1400                  */
1401                 static const char *ide_words[] = {
1402                         "noprobe", "serialize", "minus3", "minus4",
1403                         "reset", "minus6", "ata66", "minus8", "minus9",
1404                         "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1405                         "dtc2278", "umc8672", "ali14xx", NULL };
1406
1407                 hw_regs_t hwregs;
1408
1409                 hw = s[3] - '0';
1410                 hwif = &ide_hwifs[hw];
1411                 i = match_parm(&s[4], ide_words, vals, 3);
1412
1413                 /*
1414                  * Cryptic check to ensure chipset not already set for hwif.
1415                  * Note: we can't depend on hwif->chipset here.
1416                  */
1417                 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1418                         /* chipset already specified */
1419                         if (is_chipset_set[hw])
1420                                 goto bad_option;
1421                         if (i > -18 && i <= -11) {
1422                                 /* these drivers are for "ide0=" only */
1423                                 if (hw != 0)
1424                                         goto bad_hwif;
1425                                 /* chipset already specified for 2nd port */
1426                                 if (is_chipset_set[hw+1])
1427                                         goto bad_option;
1428                         }
1429                         is_chipset_set[hw] = 1;
1430                         printk("\n");
1431                 }
1432
1433                 switch (i) {
1434 #ifdef CONFIG_BLK_DEV_ALI14XX
1435                         case -17: /* "ali14xx" */
1436                                 probe_ali14xx = 1;
1437                                 goto done;
1438 #endif
1439 #ifdef CONFIG_BLK_DEV_UMC8672
1440                         case -16: /* "umc8672" */
1441                                 probe_umc8672 = 1;
1442                                 goto done;
1443 #endif
1444 #ifdef CONFIG_BLK_DEV_DTC2278
1445                         case -15: /* "dtc2278" */
1446                                 probe_dtc2278 = 1;
1447                                 goto done;
1448 #endif
1449 #ifdef CONFIG_BLK_DEV_CMD640
1450                         case -14: /* "cmd640_vlb" */
1451                                 cmd640_vlb = 1;
1452                                 goto done;
1453 #endif
1454 #ifdef CONFIG_BLK_DEV_HT6560B
1455                         case -13: /* "ht6560b" */
1456                                 probe_ht6560b = 1;
1457                                 goto done;
1458 #endif
1459 #ifdef CONFIG_BLK_DEV_QD65XX
1460                         case -12: /* "qd65xx" */
1461                                 probe_qd65xx = 1;
1462                                 goto done;
1463 #endif
1464 #ifdef CONFIG_BLK_DEV_4DRIVES
1465                         case -11: /* "four" drives on one set of ports */
1466                         {
1467                                 ide_hwif_t *mate = &ide_hwifs[hw^1];
1468                                 mate->drives[0].select.all ^= 0x20;
1469                                 mate->drives[1].select.all ^= 0x20;
1470                                 hwif->chipset = mate->chipset = ide_4drives;
1471                                 mate->irq = hwif->irq;
1472                                 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1473                                 hwif->mate = mate;
1474                                 mate->mate = hwif;
1475                                 hwif->serialized = mate->serialized = 1;
1476                                 goto obsolete_option;
1477                         }
1478 #endif /* CONFIG_BLK_DEV_4DRIVES */
1479                         case -10: /* minus10 */
1480                         case -9: /* minus9 */
1481                         case -8: /* minus8 */
1482                         case -6:
1483                         case -4:
1484                         case -3:
1485                                 goto bad_option;
1486                         case -7: /* ata66 */
1487 #ifdef CONFIG_BLK_DEV_IDEPCI
1488                                 /*
1489                                  * Use ATA_CBL_PATA40_SHORT so drive side
1490                                  * cable detection is also overriden.
1491                                  */
1492                                 hwif->cbl = ATA_CBL_PATA40_SHORT;
1493                                 goto obsolete_option;
1494 #else
1495                                 goto bad_hwif;
1496 #endif
1497                         case -5: /* "reset" */
1498                                 hwif->reset = 1;
1499                                 goto obsolete_option;
1500                         case -2: /* "serialize" */
1501                                 hwif->mate = &ide_hwifs[hw^1];
1502                                 hwif->mate->mate = hwif;
1503                                 hwif->serialized = hwif->mate->serialized = 1;
1504                                 goto obsolete_option;
1505
1506                         case -1: /* "noprobe" */
1507                                 hwif->noprobe = 1;
1508                                 goto done;
1509
1510                         case 1: /* base */
1511                                 vals[1] = vals[0] + 0x206; /* default ctl */
1512                         case 2: /* base,ctl */
1513                                 vals[2] = 0;    /* default irq = probe for it */
1514                         case 3: /* base,ctl,irq */
1515                                 memset(&hwregs, 0, sizeof(hwregs));
1516                                 ide_init_hwif_ports(&hwregs, vals[0], vals[1], &hwif->irq);
1517                                 memcpy(hwif->io_ports, hwregs.io_ports, sizeof(hwif->io_ports));
1518                                 hwif->irq      = vals[2];
1519                                 hwif->noprobe  = 0;
1520                                 hwif->chipset  = ide_forced;
1521                                 goto obsolete_option;
1522
1523                         case 0: goto bad_option;
1524                         default:
1525                                 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1526                                 return 1;
1527                 }
1528         }
1529 bad_option:
1530         printk(" -- BAD OPTION\n");
1531         return 1;
1532 obsolete_option:
1533         printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1534         return 1;
1535 bad_hwif:
1536         printk("-- NOT SUPPORTED ON ide%d", hw);
1537 done:
1538         printk("\n");
1539         return 1;
1540 }
1541
1542 EXPORT_SYMBOL(ide_lock);
1543
1544 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1545 {
1546         return 1;
1547 }
1548
1549 static char *media_string(ide_drive_t *drive)
1550 {
1551         switch (drive->media) {
1552         case ide_disk:
1553                 return "disk";
1554         case ide_cdrom:
1555                 return "cdrom";
1556         case ide_tape:
1557                 return "tape";
1558         case ide_floppy:
1559                 return "floppy";
1560         case ide_optical:
1561                 return "optical";
1562         default:
1563                 return "UNKNOWN";
1564         }
1565 }
1566
1567 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1568 {
1569         ide_drive_t *drive = to_ide_device(dev);
1570         return sprintf(buf, "%s\n", media_string(drive));
1571 }
1572
1573 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1574 {
1575         ide_drive_t *drive = to_ide_device(dev);
1576         return sprintf(buf, "%s\n", drive->name);
1577 }
1578
1579 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1580 {
1581         ide_drive_t *drive = to_ide_device(dev);
1582         return sprintf(buf, "ide:m-%s\n", media_string(drive));
1583 }
1584
1585 static ssize_t model_show(struct device *dev, struct device_attribute *attr,
1586                           char *buf)
1587 {
1588         ide_drive_t *drive = to_ide_device(dev);
1589         return sprintf(buf, "%s\n", drive->id->model);
1590 }
1591
1592 static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
1593                              char *buf)
1594 {
1595         ide_drive_t *drive = to_ide_device(dev);
1596         return sprintf(buf, "%s\n", drive->id->fw_rev);
1597 }
1598
1599 static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
1600                            char *buf)
1601 {
1602         ide_drive_t *drive = to_ide_device(dev);
1603         return sprintf(buf, "%s\n", drive->id->serial_no);
1604 }
1605
1606 static struct device_attribute ide_dev_attrs[] = {
1607         __ATTR_RO(media),
1608         __ATTR_RO(drivename),
1609         __ATTR_RO(modalias),
1610         __ATTR_RO(model),
1611         __ATTR_RO(firmware),
1612         __ATTR(serial, 0400, serial_show, NULL),
1613         __ATTR_NULL
1614 };
1615
1616 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
1617 {
1618         ide_drive_t *drive = to_ide_device(dev);
1619
1620         add_uevent_var(env, "MEDIA=%s", media_string(drive));
1621         add_uevent_var(env, "DRIVENAME=%s", drive->name);
1622         add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
1623         return 0;
1624 }
1625
1626 static int generic_ide_probe(struct device *dev)
1627 {
1628         ide_drive_t *drive = to_ide_device(dev);
1629         ide_driver_t *drv = to_ide_driver(dev->driver);
1630
1631         return drv->probe ? drv->probe(drive) : -ENODEV;
1632 }
1633
1634 static int generic_ide_remove(struct device *dev)
1635 {
1636         ide_drive_t *drive = to_ide_device(dev);
1637         ide_driver_t *drv = to_ide_driver(dev->driver);
1638
1639         if (drv->remove)
1640                 drv->remove(drive);
1641
1642         return 0;
1643 }
1644
1645 static void generic_ide_shutdown(struct device *dev)
1646 {
1647         ide_drive_t *drive = to_ide_device(dev);
1648         ide_driver_t *drv = to_ide_driver(dev->driver);
1649
1650         if (dev->driver && drv->shutdown)
1651                 drv->shutdown(drive);
1652 }
1653
1654 struct bus_type ide_bus_type = {
1655         .name           = "ide",
1656         .match          = ide_bus_match,
1657         .uevent         = ide_uevent,
1658         .probe          = generic_ide_probe,
1659         .remove         = generic_ide_remove,
1660         .shutdown       = generic_ide_shutdown,
1661         .dev_attrs      = ide_dev_attrs,
1662         .suspend        = generic_ide_suspend,
1663         .resume         = generic_ide_resume,
1664 };
1665
1666 EXPORT_SYMBOL_GPL(ide_bus_type);
1667
1668 /*
1669  * This is gets invoked once during initialization, to set *everything* up
1670  */
1671 static int __init ide_init(void)
1672 {
1673         int ret;
1674
1675         printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
1676         system_bus_speed = ide_system_bus_speed();
1677
1678         printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
1679                          "for PIO modes%s\n", system_bus_speed,
1680                         idebus_parameter ? "" : "; override with idebus=xx");
1681
1682         ret = bus_register(&ide_bus_type);
1683         if (ret < 0) {
1684                 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1685                 return ret;
1686         }
1687
1688         init_ide_data();
1689
1690         proc_ide_create();
1691
1692         return 0;
1693 }
1694
1695 #ifdef MODULE
1696 static char *options = NULL;
1697 module_param(options, charp, 0);
1698 MODULE_LICENSE("GPL");
1699
1700 static void __init parse_options (char *line)
1701 {
1702         char *next = line;
1703
1704         if (line == NULL || !*line)
1705                 return;
1706         while ((line = next) != NULL) {
1707                 if ((next = strchr(line,' ')) != NULL)
1708                         *next++ = 0;
1709                 if (!ide_setup(line))
1710                         printk (KERN_INFO "Unknown option '%s'\n", line);
1711         }
1712 }
1713
1714 int __init init_module (void)
1715 {
1716         parse_options(options);
1717         return ide_init();
1718 }
1719
1720 void __exit cleanup_module (void)
1721 {
1722         int index;
1723
1724         for (index = 0; index < MAX_HWIFS; ++index)
1725                 ide_unregister(index, 0, 0);
1726
1727         proc_ide_destroy();
1728
1729         bus_unregister(&ide_bus_type);
1730 }
1731
1732 #else /* !MODULE */
1733
1734 __setup("", ide_setup);
1735
1736 module_init(ide_init);
1737
1738 #endif /* MODULE */