SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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 /**
 465  *      ide_unregister          -       free an IDE interface
 466  *      @index: index of interface (will change soon to a pointer)
 467  *
 468  *      Perform the final unregister of an IDE interface. At the moment
 469  *      we don't refcount interfaces so this will also get split up.
 470  *
 471  *      Locking:
 472  *      The caller must not hold the IDE locks
 473  *      The drive present/vanishing is not yet properly locked
 474  *      Take care with the callbacks. These have been split to avoid
 475  *      deadlocking the IDE layer. The shutdown callback is called
 476  *      before we take the lock and free resources. It is up to the
 477  *      caller to be sure there is no pending I/O here, and that
 478  *      the interface will not be reopened (present/vanishing locking
 479  *      isn't yet done BTW). After we commit to the final kill we
 480  *      call the cleanup callback with the ide locks held.
 481  *
 482  *      Unregister restores the hwif structures to the default state.
 483  *      This is raving bonkers.
 484  */
 485
 486 void ide_unregister(unsigned int index)
 487 {
 488         ide_drive_t *drive;
 489         ide_hwif_t *hwif, *g;
 490         static ide_hwif_t tmp_hwif; /* protected by ide_cfg_mtx */
 491         ide_hwgroup_t *hwgroup;
 492         int irq_count = 0, unit;
 493
 494         BUG_ON(index >= MAX_HWIFS);
 495
 496         BUG_ON(in_interrupt());
 497         BUG_ON(irqs_disabled());
 498         mutex_lock(&ide_cfg_mtx);
 499         spin_lock_irq(&ide_lock);
 500         hwif = &ide_hwifs[index];
 501         if (!hwif->present)
 502                 goto abort;
 503         for (unit = 0; unit < MAX_DRIVES; ++unit) {
 504                 drive = &hwif->drives[unit];
 505                 if (!drive->present)
 506                         continue;
 507                 spin_unlock_irq(&ide_lock);
 508                 device_unregister(&drive->gendev);
 509                 wait_for_completion(&drive->gendev_rel_comp);
 510                 spin_lock_irq(&ide_lock);
 511         }
 512         hwif->present = 0;
 513
 514         spin_unlock_irq(&ide_lock);
 515
 516         ide_proc_unregister_port(hwif);
 517
 518         hwgroup = hwif->hwgroup;
 519         /*
 520          * free the irq if we were the only hwif using it
 521          */
 522         g = hwgroup->hwif;
 523         do {
 524                 if (g->irq == hwif->irq)
 525                         ++irq_count;
 526                 g = g->next;
 527         } while (g != hwgroup->hwif);
 528         if (irq_count == 1)
 529                 free_irq(hwif->irq, hwgroup);
 530
 531         spin_lock_irq(&ide_lock);
 532         /*
 533          * Note that we only release the standard ports,
 534          * and do not even try to handle any extra ports
 535          * allocated for weird IDE interface chipsets.
 536          */
 537         ide_hwif_release_regions(hwif);
 538
 539         /*
 540          * Remove us from the hwgroup, and free
 541          * the hwgroup if we were the only member
 542          */
 543         if (hwif->next == hwif) {
 544                 BUG_ON(hwgroup->hwif != hwif);
 545                 kfree(hwgroup);
 546         } else {
 547                 /* There is another interface in hwgroup.
 548                  * Unlink us, and set hwgroup->drive and ->hwif to
 549                  * something sane.
 550                  */
 551                 g = hwgroup->hwif;
 552                 while (g->next != hwif)
 553                         g = g->next;
 554                 g->next = hwif->next;
 555                 if (hwgroup->hwif == hwif) {
 556                         /* Chose a random hwif for hwgroup->hwif.
 557                          * It's guaranteed that there are no drives
 558                          * left in the hwgroup.
 559                          */
 560                         BUG_ON(hwgroup->drive != NULL);
 561                         hwgroup->hwif = g;
 562                 }
 563                 BUG_ON(hwgroup->hwif == hwif);
 564         }
 565
 566         /* More messed up locking ... */
 567         spin_unlock_irq(&ide_lock);
 568         device_unregister(&hwif->gendev);
 569         wait_for_completion(&hwif->gendev_rel_comp);
 570
 571         /*
 572          * Remove us from the kernel's knowledge
 573          */
 574         blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
 575         kfree(hwif->sg_table);
 576         unregister_blkdev(hwif->major, hwif->name);
 577         spin_lock_irq(&ide_lock);
 578
 579         if (hwif->dma_base) {
 580                 (void) ide_release_dma(hwif);
 581
 582                 hwif->dma_base = 0;
 583                 hwif->dma_command = 0;
 584                 hwif->dma_vendor1 = 0;
 585                 hwif->dma_status = 0;
 586                 hwif->dma_vendor3 = 0;
 587                 hwif->dma_prdtable = 0;
 588
 589                 hwif->extra_base  = 0;
 590                 hwif->extra_ports = 0;
 591         }
 592
 593         /* copy original settings */
 594         tmp_hwif = *hwif;
 595
 596         /* restore hwif data to pristine status */
 597         ide_init_port_data(hwif, index);
 598         init_hwif_default(hwif, index);
 599
 600         ide_hwif_restore(hwif, &tmp_hwif);
 601
 602 abort:
 603         spin_unlock_irq(&ide_lock);
 604         mutex_unlock(&ide_cfg_mtx);
 605 }
 606
 607 EXPORT_SYMBOL(ide_unregister);
 608
 609
 610 /**
 611  *      ide_setup_ports         -       set up IDE interface ports
 612  *      @hw: register descriptions
 613  *      @base: base register
 614  *      @offsets: table of register offsets
 615  *      @ctrl: control register
 616  *      @ack_irq: IRQ ack
 617  *      @irq: interrupt lie
 618  *
 619  *      Setup hw_regs_t structure described by parameters.  You
 620  *      may set up the hw structure yourself OR use this routine to
 621  *      do it for you. This is basically a helper
 622  *
 623  */
 624
 625 void ide_setup_ports (  hw_regs_t *hw,
 626                         unsigned long base, int *offsets,
 627                         unsigned long ctrl, unsigned long intr,
 628                         ide_ack_intr_t *ack_intr,
 629 /*
 630  *                      ide_io_ops_t *iops,
 631  */
 632                         int irq)
 633 {
 634         int i;
 635
 636         memset(hw, 0, sizeof(hw_regs_t));
 637         for (i = 0; i < IDE_NR_PORTS; i++) {
 638                 if (offsets[i] == -1) {
 639                         switch(i) {
 640                                 case IDE_CONTROL_OFFSET:
 641                                         hw->io_ports[i] = ctrl;
 642                                         break;
 643 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
 644                                 case IDE_IRQ_OFFSET:
 645                                         hw->io_ports[i] = intr;
 646                                         break;
 647 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
 648                                 default:
 649                                         hw->io_ports[i] = 0;
 650                                         break;
 651                         }
 652                 } else {
 653                         hw->io_ports[i] = base + offsets[i];
 654                 }
 655         }
 656         hw->irq = irq;
 657         hw->ack_intr = ack_intr;
 658 /*
 659  *      hw->iops = iops;
 660  */
 661 }
 662
 663 void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw)
 664 {
 665         memcpy(hwif->io_ports, hw->io_ports, sizeof(hwif->io_ports));
 666         hwif->irq = hw->irq;
 667         hwif->noprobe = 0;
 668         hwif->chipset = hw->chipset;
 669         hwif->gendev.parent = hw->dev;
 670         hwif->ack_intr = hw->ack_intr;
 671 }
 672 EXPORT_SYMBOL_GPL(ide_init_port_hw);
 673
 674 /**
 675  *      ide_register_hw         -       register IDE interface
 676  *      @hw: hardware registers
 677  *      @quirkproc: quirkproc function
 678  *      @hwifp: pointer to returned hwif
 679  *
 680  *      Register an IDE interface, specifying exactly the registers etc.
 681  *
 682  *      Returns -1 on error.
 683  */
 684
 685 int ide_register_hw(hw_regs_t *hw, void (*quirkproc)(ide_drive_t *),
 686                     ide_hwif_t **hwifp)
 687 {
 688         int index, retry = 1;
 689         ide_hwif_t *hwif;
 690         u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
 691
 692         do {
 693                 for (index = 0; index < MAX_HWIFS; ++index) {
 694                         hwif = &ide_hwifs[index];
 695                         if (hwif->io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
 696                                 goto found;
 697                 }
 698                 for (index = 0; index < MAX_HWIFS; ++index) {
 699                         hwif = &ide_hwifs[index];
 700                         if (hwif->hold)
 701                                 continue;
 702                         if (!hwif->present && hwif->mate == NULL)
 703                                 goto found;
 704                 }
 705                 for (index = 0; index < MAX_HWIFS; index++)
 706                         ide_unregister(index);
 707         } while (retry--);
 708         return -1;
 709 found:
 710         if (hwif->present)
 711                 ide_unregister(index);
 712         else if (!hwif->hold) {
 713                 ide_init_port_data(hwif, index);
 714                 init_hwif_default(hwif, index);
 715         }
 716         if (hwif->present)
 717                 return -1;
 718
 719         ide_init_port_hw(hwif, hw);
 720         hwif->quirkproc = quirkproc;
 721
 722         idx[0] = index;
 723
 724         ide_device_add(idx);
 725
 726         if (hwifp)
 727                 *hwifp = hwif;
 728
 729         return hwif->present ? index : -1;
 730 }
 731
 732 EXPORT_SYMBOL(ide_register_hw);
 733
 734 /*
 735  *      Locks for IDE setting functionality
 736  */
 737
 738 DEFINE_MUTEX(ide_setting_mtx);
 739
 740 EXPORT_SYMBOL_GPL(ide_setting_mtx);
 741
 742 /**
 743  *      ide_spin_wait_hwgroup   -       wait for group
 744  *      @drive: drive in the group
 745  *
 746  *      Wait for an IDE device group to go non busy and then return
 747  *      holding the ide_lock which guards the hwgroup->busy status
 748  *      and right to use it.
 749  */
 750
 751 int ide_spin_wait_hwgroup (ide_drive_t *drive)
 752 {
 753         ide_hwgroup_t *hwgroup = HWGROUP(drive);
 754         unsigned long timeout = jiffies + (3 * HZ);
 755
 756         spin_lock_irq(&ide_lock);
 757
 758         while (hwgroup->busy) {
 759                 unsigned long lflags;
 760                 spin_unlock_irq(&ide_lock);
 761                 local_irq_set(lflags);
 762                 if (time_after(jiffies, timeout)) {
 763                         local_irq_restore(lflags);
 764                         printk(KERN_ERR "%s: channel busy\n", drive->name);
 765                         return -EBUSY;
 766                 }
 767                 local_irq_restore(lflags);
 768                 spin_lock_irq(&ide_lock);
 769         }
 770         return 0;
 771 }
 772
 773 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
 774
 775 int set_io_32bit(ide_drive_t *drive, int arg)
 776 {
 777         if (drive->no_io_32bit)
 778                 return -EPERM;
 779
 780         if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
 781                 return -EINVAL;
 782
 783         if (ide_spin_wait_hwgroup(drive))
 784                 return -EBUSY;
 785
 786         drive->io_32bit = arg;
 787 #ifdef CONFIG_BLK_DEV_DTC2278
 788         if (HWIF(drive)->chipset == ide_dtc2278)
 789                 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
 790 #endif /* CONFIG_BLK_DEV_DTC2278 */
 791
 792         spin_unlock_irq(&ide_lock);
 793
 794         return 0;
 795 }
 796
 797 static int set_ksettings(ide_drive_t *drive, int arg)
 798 {
 799         if (arg < 0 || arg > 1)
 800                 return -EINVAL;
 801
 802         if (ide_spin_wait_hwgroup(drive))
 803                 return -EBUSY;
 804         drive->keep_settings = arg;
 805         spin_unlock_irq(&ide_lock);
 806
 807         return 0;
 808 }
 809
 810 int set_using_dma(ide_drive_t *drive, int arg)
 811 {
 812 #ifdef CONFIG_BLK_DEV_IDEDMA
 813         ide_hwif_t *hwif = drive->hwif;
 814         int err = -EPERM;
 815
 816         if (arg < 0 || arg > 1)
 817                 return -EINVAL;
 818
 819         if (!drive->id || !(drive->id->capability & 1))
 820                 goto out;
 821
 822         if (hwif->dma_host_set == NULL)
 823                 goto out;
 824
 825         err = -EBUSY;
 826         if (ide_spin_wait_hwgroup(drive))
 827                 goto out;
 828         /*
 829          * set ->busy flag, unlock and let it ride
 830          */
 831         hwif->hwgroup->busy = 1;
 832         spin_unlock_irq(&ide_lock);
 833
 834         err = 0;
 835
 836         if (arg) {
 837                 if (ide_set_dma(drive))
 838                         err = -EIO;
 839         } else
 840                 ide_dma_off(drive);
 841
 842         /*
 843          * lock, clear ->busy flag and unlock before leaving
 844          */
 845         spin_lock_irq(&ide_lock);
 846         hwif->hwgroup->busy = 0;
 847         spin_unlock_irq(&ide_lock);
 848 out:
 849         return err;
 850 #else
 851         if (arg < 0 || arg > 1)
 852                 return -EINVAL;
 853
 854         return -EPERM;
 855 #endif
 856 }
 857
 858 int set_pio_mode(ide_drive_t *drive, int arg)
 859 {
 860         struct request rq;
 861
 862         if (arg < 0 || arg > 255)
 863                 return -EINVAL;
 864
 865         if (drive->hwif->set_pio_mode == NULL)
 866                 return -ENOSYS;
 867
 868         if (drive->special.b.set_tune)
 869                 return -EBUSY;
 870
 871         ide_init_drive_cmd(&rq);
 872         rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
 873
 874         drive->tune_req = (u8) arg;
 875         drive->special.b.set_tune = 1;
 876         (void) ide_do_drive_cmd(drive, &rq, ide_wait);
 877         return 0;
 878 }
 879
 880 static int set_unmaskirq(ide_drive_t *drive, int arg)
 881 {
 882         if (drive->no_unmask)
 883                 return -EPERM;
 884
 885         if (arg < 0 || arg > 1)
 886                 return -EINVAL;
 887
 888         if (ide_spin_wait_hwgroup(drive))
 889                 return -EBUSY;
 890         drive->unmask = arg;
 891         spin_unlock_irq(&ide_lock);
 892
 893         return 0;
 894 }
 895
 896 /**
 897  *      system_bus_clock        -       clock guess
 898  *
 899  *      External version of the bus clock guess used by very old IDE drivers
 900  *      for things like VLB timings. Should not be used.
 901  */
 902
 903 int system_bus_clock (void)
 904 {
 905         return system_bus_speed;
 906 }
 907
 908 EXPORT_SYMBOL(system_bus_clock);
 909
 910 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
 911 {
 912         ide_drive_t *drive = dev->driver_data;
 913         ide_hwif_t *hwif = HWIF(drive);
 914         struct request rq;
 915         struct request_pm_state rqpm;
 916         ide_task_t args;
 917         int ret;
 918
 919         /* Call ACPI _GTM only once */
 920         if (!(drive->dn % 2))
 921                 ide_acpi_get_timing(hwif);
 922
 923         memset(&rq, 0, sizeof(rq));
 924         memset(&rqpm, 0, sizeof(rqpm));
 925         memset(&args, 0, sizeof(args));
 926         rq.cmd_type = REQ_TYPE_PM_SUSPEND;
 927         rq.special = &args;
 928         rq.data = &rqpm;
 929         rqpm.pm_step = ide_pm_state_start_suspend;
 930         if (mesg.event == PM_EVENT_PRETHAW)
 931                 mesg.event = PM_EVENT_FREEZE;
 932         rqpm.pm_state = mesg.event;
 933
 934         ret = ide_do_drive_cmd(drive, &rq, ide_wait);
 935         /* only call ACPI _PS3 after both drivers are suspended */
 936         if (!ret && (((drive->dn % 2) && hwif->drives[0].present
 937                  && hwif->drives[1].present)
 938                  || !hwif->drives[0].present
 939                  || !hwif->drives[1].present))
 940                 ide_acpi_set_state(hwif, 0);
 941         return ret;
 942 }
 943
 944 static int generic_ide_resume(struct device *dev)
 945 {
 946         ide_drive_t *drive = dev->driver_data;
 947         ide_hwif_t *hwif = HWIF(drive);
 948         struct request rq;
 949         struct request_pm_state rqpm;
 950         ide_task_t args;
 951         int err;
 952
 953         /* Call ACPI _STM only once */
 954         if (!(drive->dn % 2)) {
 955                 ide_acpi_set_state(hwif, 1);
 956                 ide_acpi_push_timing(hwif);
 957         }
 958
 959         ide_acpi_exec_tfs(drive);
 960
 961         memset(&rq, 0, sizeof(rq));
 962         memset(&rqpm, 0, sizeof(rqpm));
 963         memset(&args, 0, sizeof(args));
 964         rq.cmd_type = REQ_TYPE_PM_RESUME;
 965         rq.special = &args;
 966         rq.data = &rqpm;
 967         rqpm.pm_step = ide_pm_state_start_resume;
 968         rqpm.pm_state = PM_EVENT_ON;
 969
 970         err = ide_do_drive_cmd(drive, &rq, ide_head_wait);
 971
 972         if (err == 0 && dev->driver) {
 973                 ide_driver_t *drv = to_ide_driver(dev->driver);
 974
 975                 if (drv->resume)
 976                         drv->resume(drive);
 977         }
 978
 979         return err;
 980 }
 981
 982 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
 983                         unsigned int cmd, unsigned long arg)
 984 {
 985         unsigned long flags;
 986         ide_driver_t *drv;
 987         void __user *p = (void __user *)arg;
 988         int err = 0, (*setfunc)(ide_drive_t *, int);
 989         u8 *val;
 990
 991         switch (cmd) {
 992         case HDIO_GET_32BIT:        val = &drive->io_32bit;      goto read_val;
 993         case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
 994         case HDIO_GET_UNMASKINTR:   val = &drive->unmask;        goto read_val;
 995         case HDIO_GET_DMA:          val = &drive->using_dma;     goto read_val;
 996         case HDIO_SET_32BIT:        setfunc = set_io_32bit;      goto set_val;
 997         case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings;     goto set_val;
 998         case HDIO_SET_PIO_MODE:     setfunc = set_pio_mode;      goto set_val;
 999         case HDIO_SET_UNMASKINTR:   setfunc = set_unmaskirq;     goto set_val;
1000         case HDIO_SET_DMA:          setfunc = set_using_dma;     goto set_val;
1001         }
1002
1003         switch (cmd) {
1004                 case HDIO_OBSOLETE_IDENTITY:
1005                 case HDIO_GET_IDENTITY:
1006                         if (bdev != bdev->bd_contains)
1007                                 return -EINVAL;
1008                         if (drive->id_read == 0)
1009                                 return -ENOMSG;
1010                         if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1011                                 return -EFAULT;
1012                         return 0;
1013
1014                 case HDIO_GET_NICE:
1015                         return put_user(drive->dsc_overlap      <<      IDE_NICE_DSC_OVERLAP    |
1016                                         drive->atapi_overlap    <<      IDE_NICE_ATAPI_OVERLAP  |
1017                                         drive->nice0            <<      IDE_NICE_0              |
1018                                         drive->nice1            <<      IDE_NICE_1              |
1019                                         drive->nice2            <<      IDE_NICE_2,
1020                                         (long __user *) arg);
1021
1022 #ifdef CONFIG_IDE_TASK_IOCTL
1023                 case HDIO_DRIVE_TASKFILE:
1024                         if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1025                                 return -EACCES;
1026                         switch(drive->media) {
1027                                 case ide_disk:
1028                                         return ide_taskfile_ioctl(drive, cmd, arg);
1029                                 default:
1030                                         return -ENOMSG;
1031                         }
1032 #endif /* CONFIG_IDE_TASK_IOCTL */
1033
1034                 case HDIO_DRIVE_CMD:
1035                         if (!capable(CAP_SYS_RAWIO))
1036                                 return -EACCES;
1037                         return ide_cmd_ioctl(drive, cmd, arg);
1038
1039                 case HDIO_DRIVE_TASK:
1040                         if (!capable(CAP_SYS_RAWIO))
1041                                 return -EACCES;
1042                         return ide_task_ioctl(drive, cmd, arg);
1043
1044                 case HDIO_SCAN_HWIF:
1045                 {
1046                         hw_regs_t hw;
1047                         int args[3];
1048                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1049                         if (copy_from_user(args, p, 3 * sizeof(int)))
1050                                 return -EFAULT;
1051                         memset(&hw, 0, sizeof(hw));
1052                         ide_init_hwif_ports(&hw, (unsigned long) args[0],
1053                                             (unsigned long) args[1], NULL);
1054                         hw.irq = args[2];
1055                         if (ide_register_hw(&hw, NULL, NULL) == -1)
1056                                 return -EIO;
1057                         return 0;
1058                 }
1059                 case HDIO_UNREGISTER_HWIF:
1060                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1061                         /* (arg > MAX_HWIFS) checked in function */
1062                         ide_unregister(arg);
1063                         return 0;
1064                 case HDIO_SET_NICE:
1065                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1066                         if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1067                                 return -EPERM;
1068                         drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1069                         drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1070                         if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1071                                 drive->dsc_overlap = 0;
1072                                 return -EPERM;
1073                         }
1074                         drive->nice1 = (arg >> IDE_NICE_1) & 1;
1075                         return 0;
1076                 case HDIO_DRIVE_RESET:
1077                 {
1078                         unsigned long flags;
1079                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1080
1081                         /*
1082                          *      Abort the current command on the
1083                          *      group if there is one, taking
1084                          *      care not to allow anything else
1085                          *      to be queued and to die on the
1086                          *      spot if we miss one somehow
1087                          */
1088
1089                         spin_lock_irqsave(&ide_lock, flags);
1090
1091                         if (HWGROUP(drive)->resetting) {
1092                                 spin_unlock_irqrestore(&ide_lock, flags);
1093                                 return -EBUSY;
1094                         }
1095
1096                         ide_abort(drive, "drive reset");
1097
1098                         BUG_ON(HWGROUP(drive)->handler);
1099
1100                         /* Ensure nothing gets queued after we
1101                            drop the lock. Reset will clear the busy */
1102
1103                         HWGROUP(drive)->busy = 1;
1104                         spin_unlock_irqrestore(&ide_lock, flags);
1105                         (void) ide_do_reset(drive);
1106
1107                         return 0;
1108                 }
1109
1110                 case HDIO_GET_BUSSTATE:
1111                         if (!capable(CAP_SYS_ADMIN))
1112                                 return -EACCES;
1113                         if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1114                                 return -EFAULT;
1115                         return 0;
1116
1117                 case HDIO_SET_BUSSTATE:
1118                         if (!capable(CAP_SYS_ADMIN))
1119                                 return -EACCES;
1120                         if (HWIF(drive)->busproc)
1121                                 return HWIF(drive)->busproc(drive, (int)arg);
1122                         return -EOPNOTSUPP;
1123                 default:
1124                         return -EINVAL;
1125         }
1126
1127 read_val:
1128         mutex_lock(&ide_setting_mtx);
1129         spin_lock_irqsave(&ide_lock, flags);
1130         err = *val;
1131         spin_unlock_irqrestore(&ide_lock, flags);
1132         mutex_unlock(&ide_setting_mtx);
1133         return err >= 0 ? put_user(err, (long __user *)arg) : err;
1134
1135 set_val:
1136         if (bdev != bdev->bd_contains)
1137                 err = -EINVAL;
1138         else {
1139                 if (!capable(CAP_SYS_ADMIN))
1140                         err = -EACCES;
1141                 else {
1142                         mutex_lock(&ide_setting_mtx);
1143                         err = setfunc(drive, arg);
1144                         mutex_unlock(&ide_setting_mtx);
1145                 }
1146         }
1147         return err;
1148 }
1149
1150 EXPORT_SYMBOL(generic_ide_ioctl);
1151
1152 /*
1153  * stridx() returns the offset of c within s,
1154  * or -1 if c is '\0' or not found within s.
1155  */
1156 static int __init stridx (const char *s, char c)
1157 {
1158         char *i = strchr(s, c);
1159         return (i && c) ? i - s : -1;
1160 }
1161
1162 /*
1163  * match_parm() does parsing for ide_setup():
1164  *
1165  * 1. the first char of s must be '='.
1166  * 2. if the remainder matches one of the supplied keywords,
1167  *     the index (1 based) of the keyword is negated and returned.
1168  * 3. if the remainder is a series of no more than max_vals numbers
1169  *     separated by commas, the numbers are saved in vals[] and a
1170  *     count of how many were saved is returned.  Base10 is assumed,
1171  *     and base16 is allowed when prefixed with "0x".
1172  * 4. otherwise, zero is returned.
1173  */
1174 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1175 {
1176         static const char *decimal = "0123456789";
1177         static const char *hex = "0123456789abcdef";
1178         int i, n;
1179
1180         if (*s++ == '=') {
1181                 /*
1182                  * Try matching against the supplied keywords,
1183                  * and return -(index+1) if we match one
1184                  */
1185                 if (keywords != NULL) {
1186                         for (i = 0; *keywords != NULL; ++i) {
1187                                 if (!strcmp(s, *keywords++))
1188                                         return -(i+1);
1189                         }
1190                 }
1191                 /*
1192                  * Look for a series of no more than "max_vals"
1193                  * numeric values separated by commas, in base10,
1194                  * or base16 when prefixed with "0x".
1195                  * Return a count of how many were found.
1196                  */
1197                 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1198                         vals[n] = i;
1199                         while ((i = stridx(decimal, *++s)) >= 0)
1200                                 vals[n] = (vals[n] * 10) + i;
1201                         if (*s == 'x' && !vals[n]) {
1202                                 while ((i = stridx(hex, *++s)) >= 0)
1203                                         vals[n] = (vals[n] * 0x10) + i;
1204                         }
1205                         if (++n == max_vals)
1206                                 break;
1207                         if (*s == ',' || *s == ';')
1208                                 ++s;
1209                 }
1210                 if (!*s)
1211                         return n;
1212         }
1213         return 0;       /* zero = nothing matched */
1214 }
1215
1216 extern int probe_ali14xx;
1217 extern int probe_umc8672;
1218 extern int probe_dtc2278;
1219 extern int probe_ht6560b;
1220 extern int probe_qd65xx;
1221 extern int cmd640_vlb;
1222
1223 static int __initdata is_chipset_set[MAX_HWIFS];
1224
1225 /*
1226  * ide_setup() gets called VERY EARLY during initialization,
1227  * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1228  *
1229  * Remember to update Documentation/ide.txt if you change something here.
1230  */
1231 static int __init ide_setup(char *s)
1232 {
1233         int i, vals[3];
1234         ide_hwif_t *hwif;
1235         ide_drive_t *drive;
1236         unsigned int hw, unit;
1237         const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1238         const char max_hwif  = '0' + (MAX_HWIFS - 1);
1239
1240
1241         if (strncmp(s,"hd",2) == 0 && s[2] == '=')      /* hd= is for hd.c   */
1242                 return 0;                               /* driver and not us */
1243
1244         if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1245                 return 0;
1246
1247         printk(KERN_INFO "ide_setup: %s", s);
1248         init_ide_data ();
1249
1250 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1251         if (!strcmp(s, "ide=doubler")) {
1252                 extern int ide_doubler;
1253
1254                 printk(" : Enabled support for IDE doublers\n");
1255                 ide_doubler = 1;
1256                 return 1;
1257         }
1258 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1259
1260         if (!strcmp(s, "ide=nodma")) {
1261                 printk(" : Prevented DMA\n");
1262                 noautodma = 1;
1263                 goto obsolete_option;
1264         }
1265
1266 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1267         if (!strcmp(s, "ide=reverse")) {
1268                 ide_scan_direction = 1;
1269                 printk(" : Enabled support for IDE inverse scan order.\n");
1270                 return 1;
1271         }
1272 #endif
1273
1274 #ifdef CONFIG_BLK_DEV_IDEACPI
1275         if (!strcmp(s, "ide=noacpi")) {
1276                 //printk(" : Disable IDE ACPI support.\n");
1277                 ide_noacpi = 1;
1278                 return 1;
1279         }
1280         if (!strcmp(s, "ide=acpigtf")) {
1281                 //printk(" : Enable IDE ACPI _GTF support.\n");
1282                 ide_noacpitfs = 0;
1283                 return 1;
1284         }
1285         if (!strcmp(s, "ide=acpionboot")) {
1286                 //printk(" : Call IDE ACPI methods on boot.\n");
1287                 ide_noacpionboot = 0;
1288                 return 1;
1289         }
1290 #endif /* CONFIG_BLK_DEV_IDEACPI */
1291
1292         /*
1293          * Look for drive options:  "hdx="
1294          */
1295         if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1296                 const char *hd_words[] = {
1297                         "none", "noprobe", "nowerr", "cdrom", "nodma",
1298                         "autotune", "noautotune", "-8", "-9", "-10",
1299                         "noflush", "remap", "remap63", "scsi", NULL };
1300                 unit = s[2] - 'a';
1301                 hw   = unit / MAX_DRIVES;
1302                 unit = unit % MAX_DRIVES;
1303                 hwif = &ide_hwifs[hw];
1304                 drive = &hwif->drives[unit];
1305                 if (strncmp(s + 4, "ide-", 4) == 0) {
1306                         strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1307                         goto done;
1308                 }
1309                 switch (match_parm(&s[3], hd_words, vals, 3)) {
1310                         case -1: /* "none" */
1311                         case -2: /* "noprobe" */
1312                                 drive->noprobe = 1;
1313                                 goto done;
1314                         case -3: /* "nowerr" */
1315                                 drive->bad_wstat = BAD_R_STAT;
1316                                 hwif->noprobe = 0;
1317                                 goto done;
1318                         case -4: /* "cdrom" */
1319                                 drive->present = 1;
1320                                 drive->media = ide_cdrom;
1321                                 /* an ATAPI device ignores DRDY */
1322                                 drive->ready_stat = 0;
1323                                 hwif->noprobe = 0;
1324                                 goto done;
1325                         case -5: /* nodma */
1326                                 drive->nodma = 1;
1327                                 goto done;
1328                         case -6: /* "autotune" */
1329                                 drive->autotune = IDE_TUNE_AUTO;
1330                                 goto obsolete_option;
1331                         case -7: /* "noautotune" */
1332                                 drive->autotune = IDE_TUNE_NOAUTO;
1333                                 goto obsolete_option;
1334                         case -11: /* noflush */
1335                                 drive->noflush = 1;
1336                                 goto done;
1337                         case -12: /* "remap" */
1338                                 drive->remap_0_to_1 = 1;
1339                                 goto done;
1340                         case -13: /* "remap63" */
1341                                 drive->sect0 = 63;
1342                                 goto done;
1343                         case -14: /* "scsi" */
1344                                 drive->scsi = 1;
1345                                 goto done;
1346                         case 3: /* cyl,head,sect */
1347                                 drive->media    = ide_disk;
1348                                 drive->ready_stat = READY_STAT;
1349                                 drive->cyl      = drive->bios_cyl  = vals[0];
1350                                 drive->head     = drive->bios_head = vals[1];
1351                                 drive->sect     = drive->bios_sect = vals[2];
1352                                 drive->present  = 1;
1353                                 drive->forced_geom = 1;
1354                                 hwif->noprobe = 0;
1355                                 goto done;
1356                         default:
1357                                 goto bad_option;
1358                 }
1359         }
1360
1361         if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1362                 goto bad_option;
1363         /*
1364          * Look for bus speed option:  "idebus="
1365          */
1366         if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1367                 if (match_parm(&s[6], NULL, vals, 1) != 1)
1368                         goto bad_option;
1369                 if (vals[0] >= 20 && vals[0] <= 66) {
1370                         idebus_parameter = vals[0];
1371                 } else
1372                         printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1373                 goto done;
1374         }
1375         /*
1376          * Look for interface options:  "idex="
1377          */
1378         if (s[3] >= '0' && s[3] <= max_hwif) {
1379                 /*
1380                  * Be VERY CAREFUL changing this: note hardcoded indexes below
1381                  * (-8, -9, -10) are reserved to ease the hardcoding.
1382                  */
1383                 static const char *ide_words[] = {
1384                         "noprobe", "serialize", "minus3", "minus4",
1385                         "reset", "minus6", "ata66", "minus8", "minus9",
1386                         "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1387                         "dtc2278", "umc8672", "ali14xx", NULL };
1388
1389                 hw_regs_t hwregs;
1390
1391                 hw = s[3] - '0';
1392                 hwif = &ide_hwifs[hw];
1393                 i = match_parm(&s[4], ide_words, vals, 3);
1394
1395                 /*
1396                  * Cryptic check to ensure chipset not already set for hwif.
1397                  * Note: we can't depend on hwif->chipset here.
1398                  */
1399                 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1400                         /* chipset already specified */
1401                         if (is_chipset_set[hw])
1402                                 goto bad_option;
1403                         if (i > -18 && i <= -11) {
1404                                 /* these drivers are for "ide0=" only */
1405                                 if (hw != 0)
1406                                         goto bad_hwif;
1407                                 /* chipset already specified for 2nd port */
1408                                 if (is_chipset_set[hw+1])
1409                                         goto bad_option;
1410                         }
1411                         is_chipset_set[hw] = 1;
1412                         printk("\n");
1413                 }
1414
1415                 switch (i) {
1416 #ifdef CONFIG_BLK_DEV_ALI14XX
1417                         case -17: /* "ali14xx" */
1418                                 probe_ali14xx = 1;
1419                                 goto done;
1420 #endif
1421 #ifdef CONFIG_BLK_DEV_UMC8672
1422                         case -16: /* "umc8672" */
1423                                 probe_umc8672 = 1;
1424                                 goto done;
1425 #endif
1426 #ifdef CONFIG_BLK_DEV_DTC2278
1427                         case -15: /* "dtc2278" */
1428                                 probe_dtc2278 = 1;
1429                                 goto done;
1430 #endif
1431 #ifdef CONFIG_BLK_DEV_CMD640
1432                         case -14: /* "cmd640_vlb" */
1433                                 cmd640_vlb = 1;
1434                                 goto done;
1435 #endif
1436 #ifdef CONFIG_BLK_DEV_HT6560B
1437                         case -13: /* "ht6560b" */
1438                                 probe_ht6560b = 1;
1439                                 goto done;
1440 #endif
1441 #ifdef CONFIG_BLK_DEV_QD65XX
1442                         case -12: /* "qd65xx" */
1443                                 probe_qd65xx = 1;
1444                                 goto done;
1445 #endif
1446 #ifdef CONFIG_BLK_DEV_4DRIVES
1447                         case -11: /* "four" drives on one set of ports */
1448                         {
1449                                 ide_hwif_t *mate = &ide_hwifs[hw^1];
1450                                 mate->drives[0].select.all ^= 0x20;
1451                                 mate->drives[1].select.all ^= 0x20;
1452                                 hwif->chipset = mate->chipset = ide_4drives;
1453                                 mate->irq = hwif->irq;
1454                                 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1455                                 hwif->mate = mate;
1456                                 mate->mate = hwif;
1457                                 hwif->serialized = mate->serialized = 1;
1458                                 goto obsolete_option;
1459                         }
1460 #endif /* CONFIG_BLK_DEV_4DRIVES */
1461                         case -10: /* minus10 */
1462                         case -9: /* minus9 */
1463                         case -8: /* minus8 */
1464                         case -6:
1465                         case -4:
1466                         case -3:
1467                                 goto bad_option;
1468                         case -7: /* ata66 */
1469 #ifdef CONFIG_BLK_DEV_IDEPCI
1470                                 /*
1471                                  * Use ATA_CBL_PATA40_SHORT so drive side
1472                                  * cable detection is also overriden.
1473                                  */
1474                                 hwif->cbl = ATA_CBL_PATA40_SHORT;
1475                                 goto obsolete_option;
1476 #else
1477                                 goto bad_hwif;
1478 #endif
1479                         case -5: /* "reset" */
1480                                 hwif->reset = 1;
1481                                 goto obsolete_option;
1482                         case -2: /* "serialize" */
1483                                 hwif->mate = &ide_hwifs[hw^1];
1484                                 hwif->mate->mate = hwif;
1485                                 hwif->serialized = hwif->mate->serialized = 1;
1486                                 goto obsolete_option;
1487
1488                         case -1: /* "noprobe" */
1489                                 hwif->noprobe = 1;
1490                                 goto done;
1491
1492                         case 1: /* base */
1493                                 vals[1] = vals[0] + 0x206; /* default ctl */
1494                         case 2: /* base,ctl */
1495                                 vals[2] = 0;    /* default irq = probe for it */
1496                         case 3: /* base,ctl,irq */
1497                                 memset(&hwregs, 0, sizeof(hwregs));
1498                                 ide_init_hwif_ports(&hwregs, vals[0], vals[1], &hwif->irq);
1499                                 memcpy(hwif->io_ports, hwregs.io_ports, sizeof(hwif->io_ports));
1500                                 hwif->irq      = vals[2];
1501                                 hwif->noprobe  = 0;
1502                                 hwif->chipset  = ide_forced;
1503                                 goto obsolete_option;
1504
1505                         case 0: goto bad_option;
1506                         default:
1507                                 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1508                                 return 1;
1509                 }
1510         }
1511 bad_option:
1512         printk(" -- BAD OPTION\n");
1513         return 1;
1514 obsolete_option:
1515         printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1516         return 1;
1517 bad_hwif:
1518         printk("-- NOT SUPPORTED ON ide%d", hw);
1519 done:
1520         printk("\n");
1521         return 1;
1522 }
1523
1524 EXPORT_SYMBOL(ide_lock);
1525
1526 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1527 {
1528         return 1;
1529 }
1530
1531 static char *media_string(ide_drive_t *drive)
1532 {
1533         switch (drive->media) {
1534         case ide_disk:
1535                 return "disk";
1536         case ide_cdrom:
1537                 return "cdrom";
1538         case ide_tape:
1539                 return "tape";
1540         case ide_floppy:
1541                 return "floppy";
1542         case ide_optical:
1543                 return "optical";
1544         default:
1545                 return "UNKNOWN";
1546         }
1547 }
1548
1549 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1550 {
1551         ide_drive_t *drive = to_ide_device(dev);
1552         return sprintf(buf, "%s\n", media_string(drive));
1553 }
1554
1555 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1556 {
1557         ide_drive_t *drive = to_ide_device(dev);
1558         return sprintf(buf, "%s\n", drive->name);
1559 }
1560
1561 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1562 {
1563         ide_drive_t *drive = to_ide_device(dev);
1564         return sprintf(buf, "ide:m-%s\n", media_string(drive));
1565 }
1566
1567 static ssize_t model_show(struct device *dev, struct device_attribute *attr,
1568                           char *buf)
1569 {
1570         ide_drive_t *drive = to_ide_device(dev);
1571         return sprintf(buf, "%s\n", drive->id->model);
1572 }
1573
1574 static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
1575                              char *buf)
1576 {
1577         ide_drive_t *drive = to_ide_device(dev);
1578         return sprintf(buf, "%s\n", drive->id->fw_rev);
1579 }
1580
1581 static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
1582                            char *buf)
1583 {
1584         ide_drive_t *drive = to_ide_device(dev);
1585         return sprintf(buf, "%s\n", drive->id->serial_no);
1586 }
1587
1588 static struct device_attribute ide_dev_attrs[] = {
1589         __ATTR_RO(media),
1590         __ATTR_RO(drivename),
1591         __ATTR_RO(modalias),
1592         __ATTR_RO(model),
1593         __ATTR_RO(firmware),
1594         __ATTR(serial, 0400, serial_show, NULL),
1595         __ATTR_NULL
1596 };
1597
1598 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
1599 {
1600         ide_drive_t *drive = to_ide_device(dev);
1601
1602         add_uevent_var(env, "MEDIA=%s", media_string(drive));
1603         add_uevent_var(env, "DRIVENAME=%s", drive->name);
1604         add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
1605         return 0;
1606 }
1607
1608 static int generic_ide_probe(struct device *dev)
1609 {
1610         ide_drive_t *drive = to_ide_device(dev);
1611         ide_driver_t *drv = to_ide_driver(dev->driver);
1612
1613         return drv->probe ? drv->probe(drive) : -ENODEV;
1614 }
1615
1616 static int generic_ide_remove(struct device *dev)
1617 {
1618         ide_drive_t *drive = to_ide_device(dev);
1619         ide_driver_t *drv = to_ide_driver(dev->driver);
1620
1621         if (drv->remove)
1622                 drv->remove(drive);
1623
1624         return 0;
1625 }
1626
1627 static void generic_ide_shutdown(struct device *dev)
1628 {
1629         ide_drive_t *drive = to_ide_device(dev);
1630         ide_driver_t *drv = to_ide_driver(dev->driver);
1631
1632         if (dev->driver && drv->shutdown)
1633                 drv->shutdown(drive);
1634 }
1635
1636 struct bus_type ide_bus_type = {
1637         .name           = "ide",
1638         .match          = ide_bus_match,
1639         .uevent         = ide_uevent,
1640         .probe          = generic_ide_probe,
1641         .remove         = generic_ide_remove,
1642         .shutdown       = generic_ide_shutdown,
1643         .dev_attrs      = ide_dev_attrs,
1644         .suspend        = generic_ide_suspend,
1645         .resume         = generic_ide_resume,
1646 };
1647
1648 EXPORT_SYMBOL_GPL(ide_bus_type);
1649
1650 /*
1651  * This is gets invoked once during initialization, to set *everything* up
1652  */
1653 static int __init ide_init(void)
1654 {
1655         int ret;
1656
1657         printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
1658         system_bus_speed = ide_system_bus_speed();
1659
1660         printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
1661                          "for PIO modes%s\n", system_bus_speed,
1662                         idebus_parameter ? "" : "; override with idebus=xx");
1663
1664         ret = bus_register(&ide_bus_type);
1665         if (ret < 0) {
1666                 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1667                 return ret;
1668         }
1669
1670         init_ide_data();
1671
1672         proc_ide_create();
1673
1674         return 0;
1675 }
1676
1677 #ifdef MODULE
1678 static char *options = NULL;
1679 module_param(options, charp, 0);
1680 MODULE_LICENSE("GPL");
1681
1682 static void __init parse_options (char *line)
1683 {
1684         char *next = line;
1685
1686         if (line == NULL || !*line)
1687                 return;
1688         while ((line = next) != NULL) {
1689                 if ((next = strchr(line,' ')) != NULL)
1690                         *next++ = 0;
1691                 if (!ide_setup(line))
1692                         printk (KERN_INFO "Unknown option '%s'\n", line);
1693         }
1694 }
1695
1696 int __init init_module (void)
1697 {
1698         parse_options(options);
1699         return ide_init();
1700 }
1701
1702 void __exit cleanup_module (void)
1703 {
1704         int index;
1705
1706         for (index = 0; index < MAX_HWIFS; ++index)
1707                 ide_unregister(index);
1708
1709         proc_ide_destroy();
1710
1711         bus_unregister(&ide_bus_type);
1712 }
1713
1714 #else /* !MODULE */
1715
1716 __setup("", ide_setup);
1717
1718 module_init(ide_init);
1719
1720 #endif /* MODULE */