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   1 /*
   2  *  linux/drivers/ide/ide.c             Version 7.00beta2       Mar 05 2003
   3  *
   4  *  Copyright (C) 1994-1998  Linus Torvalds & authors (see below)
   5  */
   6
   7 /*
   8  *  Mostly written by Mark Lord  <mlord@pobox.com>
   9  *                and Gadi Oxman <gadio@netvision.net.il>
  10  *                and Andre Hedrick <andre@linux-ide.org>
  11  *
  12  *  See linux/MAINTAINERS for address of current maintainer.
  13  *
  14  * This is the multiple IDE interface driver, as evolved from hd.c.
  15  * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs
  16  *   (usually 14 & 15).
  17  * There can be up to two drives per interface, as per the ATA-2 spec.
  18  *
  19  * ...
  20  *
  21  *  From hd.c:
  22  *  |
  23  *  | It traverses the request-list, using interrupts to jump between functions.
  24  *  | As nearly all functions can be called within interrupts, we may not sleep.
  25  *  | Special care is recommended.  Have Fun!
  26  *  |
  27  *  | modified by Drew Eckhardt to check nr of hd's from the CMOS.
  28  *  |
  29  *  | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
  30  *  | in the early extended-partition checks and added DM partitions.
  31  *  |
  32  *  | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
  33  *  |
  34  *  | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
  35  *  | and general streamlining by Mark Lord (mlord@pobox.com).
  36  *
  37  *  October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
  38  *
  39  *      Mark Lord       (mlord@pobox.com)               (IDE Perf.Pkg)
  40  *      Delman Lee      (delman@ieee.org)               ("Mr. atdisk2")
  41  *      Scott Snyder    (snyder@fnald0.fnal.gov)        (ATAPI IDE cd-rom)
  42  *
  43  *  This was a rewrite of just about everything from hd.c, though some original
  44  *  code is still sprinkled about.  Think of it as a major evolution, with
  45  *  inspiration from lots of linux users, esp.  hamish@zot.apana.org.au
  46  */
  47
  48 #define REVISION        "Revision: 7.00alpha2"
  49 #define VERSION         "Id: ide.c 7.00a2 20020906"
  50
  51 #define _IDE_C                  /* Tell ide.h it's really us */
  52
  53 #include <linux/module.h>
  54 #include <linux/types.h>
  55 #include <linux/string.h>
  56 #include <linux/kernel.h>
  57 #include <linux/timer.h>
  58 #include <linux/mm.h>
  59 #include <linux/interrupt.h>
  60 #include <linux/major.h>
  61 #include <linux/errno.h>
  62 #include <linux/genhd.h>
  63 #include <linux/blkpg.h>
  64 #include <linux/slab.h>
  65 #include <linux/init.h>
  66 #include <linux/pci.h>
  67 #include <linux/delay.h>
  68 #include <linux/ide.h>
  69 #include <linux/completion.h>
  70 #include <linux/reboot.h>
  71 #include <linux/cdrom.h>
  72 #include <linux/seq_file.h>
  73 #include <linux/device.h>
  74 #include <linux/bitops.h>
  75
  76 #include <asm/byteorder.h>
  77 #include <asm/irq.h>
  78 #include <asm/uaccess.h>
  79 #include <asm/io.h>
  80
  81
  82 /* default maximum number of failures */
  83 #define IDE_DEFAULT_MAX_FAILURES        1
  84
  85 static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
  86                                         IDE2_MAJOR, IDE3_MAJOR,
  87                                         IDE4_MAJOR, IDE5_MAJOR,
  88                                         IDE6_MAJOR, IDE7_MAJOR,
  89                                         IDE8_MAJOR, IDE9_MAJOR };
  90
  91 static int idebus_parameter;    /* holds the "idebus=" parameter */
  92 static int system_bus_speed;    /* holds what we think is VESA/PCI bus speed */
  93
  94 DEFINE_MUTEX(ide_cfg_mtx);
  95  __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
  96
  97 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
  98 static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
  99 #endif
 100
 101 int noautodma = 0;
 102
 103 #ifdef CONFIG_BLK_DEV_IDEACPI
 104 int ide_noacpi = 0;
 105 int ide_noacpitfs = 1;
 106 int ide_noacpionboot = 1;
 107 #endif
 108
 109 /*
 110  * This is declared extern in ide.h, for access by other IDE modules:
 111  */
 112 ide_hwif_t ide_hwifs[MAX_HWIFS];        /* master data repository */
 113
 114 EXPORT_SYMBOL(ide_hwifs);
 115
 116 /*
 117  * Do not even *think* about calling this!
 118  */
 119 void ide_init_port_data(ide_hwif_t *hwif, unsigned int index)
 120 {
 121         unsigned int unit;
 122
 123         /* bulk initialize hwif & drive info with zeros */
 124         memset(hwif, 0, sizeof(ide_hwif_t));
 125
 126         /* fill in any non-zero initial values */
 127         hwif->index     = index;
 128         hwif->major     = ide_hwif_to_major[index];
 129
 130         hwif->name[0]   = 'i';
 131         hwif->name[1]   = 'd';
 132         hwif->name[2]   = 'e';
 133         hwif->name[3]   = '0' + index;
 134
 135         hwif->bus_state = BUSSTATE_ON;
 136
 137         init_completion(&hwif->gendev_rel_comp);
 138
 139         default_hwif_iops(hwif);
 140         default_hwif_transport(hwif);
 141         for (unit = 0; unit < MAX_DRIVES; ++unit) {
 142                 ide_drive_t *drive = &hwif->drives[unit];
 143
 144                 drive->media                    = ide_disk;
 145                 drive->select.all               = (unit<<4)|0xa0;
 146                 drive->hwif                     = hwif;
 147                 drive->ctl                      = 0x08;
 148                 drive->ready_stat               = READY_STAT;
 149                 drive->bad_wstat                = BAD_W_STAT;
 150                 drive->special.b.recalibrate    = 1;
 151                 drive->special.b.set_geometry   = 1;
 152                 drive->name[0]                  = 'h';
 153                 drive->name[1]                  = 'd';
 154                 drive->name[2]                  = 'a' + (index * MAX_DRIVES) + unit;
 155                 drive->max_failures             = IDE_DEFAULT_MAX_FAILURES;
 156                 drive->using_dma                = 0;
 157                 drive->vdma                     = 0;
 158                 INIT_LIST_HEAD(&drive->list);
 159                 init_completion(&drive->gendev_rel_comp);
 160         }
 161 }
 162 EXPORT_SYMBOL_GPL(ide_init_port_data);
 163
 164 static void init_hwif_default(ide_hwif_t *hwif, unsigned int index)
 165 {
 166         hw_regs_t hw;
 167
 168         memset(&hw, 0, sizeof(hw_regs_t));
 169
 170         ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq);
 171
 172         memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
 173
 174         hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
 175 #ifdef CONFIG_BLK_DEV_HD
 176         if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA)
 177                 hwif->noprobe = 1;      /* may be overridden by ide_setup() */
 178 #endif
 179 }
 180
 181 extern void ide_arm_init(void);
 182
 183 /*
 184  * init_ide_data() sets reasonable default values into all fields
 185  * of all instances of the hwifs and drives, but only on the first call.
 186  * Subsequent calls have no effect (they don't wipe out anything).
 187  *
 188  * This routine is normally called at driver initialization time,
 189  * but may also be called MUCH earlier during kernel "command-line"
 190  * parameter processing.  As such, we cannot depend on any other parts
 191  * of the kernel (such as memory allocation) to be functioning yet.
 192  *
 193  * This is too bad, as otherwise we could dynamically allocate the
 194  * ide_drive_t structs as needed, rather than always consuming memory
 195  * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
 196  *
 197  * FIXME: We should stuff the setup data into __init and copy the
 198  * relevant hwifs/allocate them properly during boot.
 199  */
 200 #define MAGIC_COOKIE 0x12345678
 201 static void __init init_ide_data (void)
 202 {
 203         ide_hwif_t *hwif;
 204         unsigned int index;
 205         static unsigned long magic_cookie = MAGIC_COOKIE;
 206
 207         if (magic_cookie != MAGIC_COOKIE)
 208                 return;         /* already initialized */
 209         magic_cookie = 0;
 210
 211         /* Initialise all interface structures */
 212         for (index = 0; index < MAX_HWIFS; ++index) {
 213                 hwif = &ide_hwifs[index];
 214                 ide_init_port_data(hwif, index);
 215                 init_hwif_default(hwif, index);
 216 #if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
 217                 hwif->irq =
 218                         ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
 219 #endif
 220         }
 221 }
 222
 223 /**
 224  *      ide_system_bus_speed    -       guess bus speed
 225  *
 226  *      ide_system_bus_speed() returns what we think is the system VESA/PCI
 227  *      bus speed (in MHz). This is used for calculating interface PIO timings.
 228  *      The default is 40 for known PCI systems, 50 otherwise.
 229  *      The "idebus=xx" parameter can be used to override this value.
 230  *      The actual value to be used is computed/displayed the first time
 231  *      through. Drivers should only use this as a last resort.
 232  *
 233  *      Returns a guessed speed in MHz.
 234  */
 235
 236 static int ide_system_bus_speed(void)
 237 {
 238 #ifdef CONFIG_PCI
 239         static struct pci_device_id pci_default[] = {
 240                 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
 241                 { }
 242         };
 243 #else
 244 #define pci_default 0
 245 #endif /* CONFIG_PCI */
 246
 247         if (!system_bus_speed) {
 248                 if (idebus_parameter) {
 249                         /* user supplied value */
 250                         system_bus_speed = idebus_parameter;
 251                 } else if (pci_dev_present(pci_default)) {
 252                         /* safe default value for PCI */
 253                         system_bus_speed = 33;
 254                 } else {
 255                         /* safe default value for VESA and PCI */
 256                         system_bus_speed = 50;
 257                 }
 258                 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
 259                         "for PIO modes%s\n", system_bus_speed,
 260                         idebus_parameter ? "" : "; override with idebus=xx");
 261         }
 262         return system_bus_speed;
 263 }
 264
 265 ide_hwif_t * ide_find_port(unsigned long base)
 266 {
 267         ide_hwif_t *hwif;
 268         int i;
 269
 270         for (i = 0; i < MAX_HWIFS; i++) {
 271                 hwif = &ide_hwifs[i];
 272                 if (hwif->io_ports[IDE_DATA_OFFSET] == base)
 273                         goto found;
 274         }
 275
 276         for (i = 0; i < MAX_HWIFS; i++) {
 277                 hwif = &ide_hwifs[i];
 278                 if (hwif->io_ports[IDE_DATA_OFFSET] == 0)
 279                         goto found;
 280         }
 281
 282         hwif = NULL;
 283 found:
 284         return hwif;
 285 }
 286
 287 EXPORT_SYMBOL_GPL(ide_find_port);
 288
 289 static struct resource* hwif_request_region(ide_hwif_t *hwif,
 290                                             unsigned long addr, int num)
 291 {
 292         struct resource *res = request_region(addr, num, hwif->name);
 293
 294         if (!res)
 295                 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
 296                                 hwif->name, addr, addr+num-1);
 297         return res;
 298 }
 299
 300 /**
 301  *      ide_hwif_request_regions - request resources for IDE
 302  *      @hwif: interface to use
 303  *
 304  *      Requests all the needed resources for an interface.
 305  *      Right now core IDE code does this work which is deeply wrong.
 306  *      MMIO leaves it to the controller driver,
 307  *      PIO will migrate this way over time.
 308  */
 309
 310 int ide_hwif_request_regions(ide_hwif_t *hwif)
 311 {
 312         unsigned long addr;
 313         unsigned int i;
 314
 315         if (hwif->mmio)
 316                 return 0;
 317         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
 318         if (addr && !hwif_request_region(hwif, addr, 1))
 319                 goto control_region_busy;
 320         hwif->straight8 = 0;
 321         addr = hwif->io_ports[IDE_DATA_OFFSET];
 322         if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
 323                 if (!hwif_request_region(hwif, addr, 8))
 324                         goto data_region_busy;
 325                 hwif->straight8 = 1;
 326                 return 0;
 327         }
 328         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
 329                 addr = hwif->io_ports[i];
 330                 if (!hwif_request_region(hwif, addr, 1)) {
 331                         while (--i)
 332                                 release_region(addr, 1);
 333                         goto data_region_busy;
 334                 }
 335         }
 336         return 0;
 337
 338 data_region_busy:
 339         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
 340         if (addr)
 341                 release_region(addr, 1);
 342 control_region_busy:
 343         /* If any errors are return, we drop the hwif interface. */
 344         return -EBUSY;
 345 }
 346
 347 /**
 348  *      ide_hwif_release_regions - free IDE resources
 349  *
 350  *      Note that we only release the standard ports,
 351  *      and do not even try to handle any extra ports
 352  *      allocated for weird IDE interface chipsets.
 353  *
 354  *      Note also that we don't yet handle mmio resources here. More
 355  *      importantly our caller should be doing this so we need to
 356  *      restructure this as a helper function for drivers.
 357  */
 358
 359 void ide_hwif_release_regions(ide_hwif_t *hwif)
 360 {
 361         u32 i = 0;
 362
 363         if (hwif->mmio)
 364                 return;
 365         if (hwif->io_ports[IDE_CONTROL_OFFSET])
 366                 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
 367         if (hwif->straight8) {
 368                 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
 369                 return;
 370         }
 371         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
 372                 if (hwif->io_ports[i])
 373                         release_region(hwif->io_ports[i], 1);
 374 }
 375
 376 /**
 377  *      ide_hwif_restore        -       restore hwif to template
 378  *      @hwif: hwif to update
 379  *      @tmp_hwif: template
 380  *
 381  *      Restore hwif to a previous state by copying most settings
 382  *      from the template.
 383  */
 384
 385 static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
 386 {
 387         hwif->hwgroup                   = tmp_hwif->hwgroup;
 388
 389         hwif->gendev.parent             = tmp_hwif->gendev.parent;
 390
 391         hwif->proc                      = tmp_hwif->proc;
 392
 393         hwif->major                     = tmp_hwif->major;
 394         hwif->straight8                 = tmp_hwif->straight8;
 395         hwif->bus_state                 = tmp_hwif->bus_state;
 396
 397         hwif->host_flags                = tmp_hwif->host_flags;
 398
 399         hwif->pio_mask                  = tmp_hwif->pio_mask;
 400
 401         hwif->ultra_mask                = tmp_hwif->ultra_mask;
 402         hwif->mwdma_mask                = tmp_hwif->mwdma_mask;
 403         hwif->swdma_mask                = tmp_hwif->swdma_mask;
 404
 405         hwif->cbl                       = tmp_hwif->cbl;
 406
 407         hwif->chipset                   = tmp_hwif->chipset;
 408         hwif->hold                      = tmp_hwif->hold;
 409
 410 #ifdef CONFIG_BLK_DEV_IDEPCI
 411         hwif->pci_dev                   = tmp_hwif->pci_dev;
 412         hwif->cds                       = tmp_hwif->cds;
 413 #endif
 414
 415         hwif->set_pio_mode              = tmp_hwif->set_pio_mode;
 416         hwif->set_dma_mode              = tmp_hwif->set_dma_mode;
 417         hwif->mdma_filter               = tmp_hwif->mdma_filter;
 418         hwif->udma_filter               = tmp_hwif->udma_filter;
 419         hwif->selectproc                = tmp_hwif->selectproc;
 420         hwif->reset_poll                = tmp_hwif->reset_poll;
 421         hwif->pre_reset                 = tmp_hwif->pre_reset;
 422         hwif->resetproc                 = tmp_hwif->resetproc;
 423         hwif->maskproc                  = tmp_hwif->maskproc;
 424         hwif->quirkproc                 = tmp_hwif->quirkproc;
 425         hwif->busproc                   = tmp_hwif->busproc;
 426
 427         hwif->ata_input_data            = tmp_hwif->ata_input_data;
 428         hwif->ata_output_data           = tmp_hwif->ata_output_data;
 429         hwif->atapi_input_bytes         = tmp_hwif->atapi_input_bytes;
 430         hwif->atapi_output_bytes        = tmp_hwif->atapi_output_bytes;
 431
 432         hwif->dma_host_set              = tmp_hwif->dma_host_set;
 433         hwif->dma_setup                 = tmp_hwif->dma_setup;
 434         hwif->dma_exec_cmd              = tmp_hwif->dma_exec_cmd;
 435         hwif->dma_start                 = tmp_hwif->dma_start;
 436         hwif->ide_dma_end               = tmp_hwif->ide_dma_end;
 437         hwif->ide_dma_test_irq          = tmp_hwif->ide_dma_test_irq;
 438         hwif->ide_dma_clear_irq         = tmp_hwif->ide_dma_clear_irq;
 439         hwif->dma_lost_irq              = tmp_hwif->dma_lost_irq;
 440         hwif->dma_timeout               = tmp_hwif->dma_timeout;
 441
 442         hwif->OUTB                      = tmp_hwif->OUTB;
 443         hwif->OUTBSYNC                  = tmp_hwif->OUTBSYNC;
 444         hwif->OUTW                      = tmp_hwif->OUTW;
 445         hwif->OUTSW                     = tmp_hwif->OUTSW;
 446         hwif->OUTSL                     = tmp_hwif->OUTSL;
 447
 448         hwif->INB                       = tmp_hwif->INB;
 449         hwif->INW                       = tmp_hwif->INW;
 450         hwif->INSW                      = tmp_hwif->INSW;
 451         hwif->INSL                      = tmp_hwif->INSL;
 452
 453         hwif->sg_max_nents              = tmp_hwif->sg_max_nents;
 454
 455         hwif->mmio                      = tmp_hwif->mmio;
 456         hwif->rqsize                    = tmp_hwif->rqsize;
 457
 458 #ifndef CONFIG_BLK_DEV_IDECS
 459         hwif->irq                       = tmp_hwif->irq;
 460 #endif
 461
 462         hwif->dma_base                  = tmp_hwif->dma_base;
 463         hwif->dma_command               = tmp_hwif->dma_command;
 464         hwif->dma_vendor1               = tmp_hwif->dma_vendor1;
 465         hwif->dma_status                = tmp_hwif->dma_status;
 466         hwif->dma_vendor3               = tmp_hwif->dma_vendor3;
 467         hwif->dma_prdtable              = tmp_hwif->dma_prdtable;
 468
 469         hwif->config_data               = tmp_hwif->config_data;
 470         hwif->select_data               = tmp_hwif->select_data;
 471         hwif->extra_base                = tmp_hwif->extra_base;
 472         hwif->extra_ports               = tmp_hwif->extra_ports;
 473
 474         hwif->hwif_data                 = tmp_hwif->hwif_data;
 475 }
 476
 477 /**
 478  *      ide_unregister          -       free an IDE interface
 479  *      @index: index of interface (will change soon to a pointer)
 480  *
 481  *      Perform the final unregister of an IDE interface. At the moment
 482  *      we don't refcount interfaces so this will also get split up.
 483  *
 484  *      Locking:
 485  *      The caller must not hold the IDE locks
 486  *      The drive present/vanishing is not yet properly locked
 487  *      Take care with the callbacks. These have been split to avoid
 488  *      deadlocking the IDE layer. The shutdown callback is called
 489  *      before we take the lock and free resources. It is up to the
 490  *      caller to be sure there is no pending I/O here, and that
 491  *      the interface will not be reopened (present/vanishing locking
 492  *      isn't yet done BTW). After we commit to the final kill we
 493  *      call the cleanup callback with the ide locks held.
 494  *
 495  *      Unregister restores the hwif structures to the default state.
 496  *      This is raving bonkers.
 497  */
 498
 499 void ide_unregister(unsigned int index)
 500 {
 501         ide_drive_t *drive;
 502         ide_hwif_t *hwif, *g;
 503         static ide_hwif_t tmp_hwif; /* protected by ide_cfg_mtx */
 504         ide_hwgroup_t *hwgroup;
 505         int irq_count = 0, unit;
 506
 507         BUG_ON(index >= MAX_HWIFS);
 508
 509         BUG_ON(in_interrupt());
 510         BUG_ON(irqs_disabled());
 511         mutex_lock(&ide_cfg_mtx);
 512         spin_lock_irq(&ide_lock);
 513         hwif = &ide_hwifs[index];
 514         if (!hwif->present)
 515                 goto abort;
 516         for (unit = 0; unit < MAX_DRIVES; ++unit) {
 517                 drive = &hwif->drives[unit];
 518                 if (!drive->present)
 519                         continue;
 520                 spin_unlock_irq(&ide_lock);
 521                 device_unregister(&drive->gendev);
 522                 wait_for_completion(&drive->gendev_rel_comp);
 523                 spin_lock_irq(&ide_lock);
 524         }
 525         hwif->present = 0;
 526
 527         spin_unlock_irq(&ide_lock);
 528
 529         ide_proc_unregister_port(hwif);
 530
 531         hwgroup = hwif->hwgroup;
 532         /*
 533          * free the irq if we were the only hwif using it
 534          */
 535         g = hwgroup->hwif;
 536         do {
 537                 if (g->irq == hwif->irq)
 538                         ++irq_count;
 539                 g = g->next;
 540         } while (g != hwgroup->hwif);
 541         if (irq_count == 1)
 542                 free_irq(hwif->irq, hwgroup);
 543
 544         spin_lock_irq(&ide_lock);
 545         /*
 546          * Note that we only release the standard ports,
 547          * and do not even try to handle any extra ports
 548          * allocated for weird IDE interface chipsets.
 549          */
 550         ide_hwif_release_regions(hwif);
 551
 552         /*
 553          * Remove us from the hwgroup, and free
 554          * the hwgroup if we were the only member
 555          */
 556         if (hwif->next == hwif) {
 557                 BUG_ON(hwgroup->hwif != hwif);
 558                 kfree(hwgroup);
 559         } else {
 560                 /* There is another interface in hwgroup.
 561                  * Unlink us, and set hwgroup->drive and ->hwif to
 562                  * something sane.
 563                  */
 564                 g = hwgroup->hwif;
 565                 while (g->next != hwif)
 566                         g = g->next;
 567                 g->next = hwif->next;
 568                 if (hwgroup->hwif == hwif) {
 569                         /* Chose a random hwif for hwgroup->hwif.
 570                          * It's guaranteed that there are no drives
 571                          * left in the hwgroup.
 572                          */
 573                         BUG_ON(hwgroup->drive != NULL);
 574                         hwgroup->hwif = g;
 575                 }
 576                 BUG_ON(hwgroup->hwif == hwif);
 577         }
 578
 579         /* More messed up locking ... */
 580         spin_unlock_irq(&ide_lock);
 581         device_unregister(&hwif->gendev);
 582         wait_for_completion(&hwif->gendev_rel_comp);
 583
 584         /*
 585          * Remove us from the kernel's knowledge
 586          */
 587         blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
 588         kfree(hwif->sg_table);
 589         unregister_blkdev(hwif->major, hwif->name);
 590         spin_lock_irq(&ide_lock);
 591
 592         if (hwif->dma_base) {
 593                 (void) ide_release_dma(hwif);
 594
 595                 hwif->dma_base = 0;
 596                 hwif->dma_command = 0;
 597                 hwif->dma_vendor1 = 0;
 598                 hwif->dma_status = 0;
 599                 hwif->dma_vendor3 = 0;
 600                 hwif->dma_prdtable = 0;
 601
 602                 hwif->extra_base  = 0;
 603                 hwif->extra_ports = 0;
 604         }
 605
 606         /* copy original settings */
 607         tmp_hwif = *hwif;
 608
 609         /* restore hwif data to pristine status */
 610         ide_init_port_data(hwif, index);
 611         init_hwif_default(hwif, index);
 612
 613         ide_hwif_restore(hwif, &tmp_hwif);
 614
 615 abort:
 616         spin_unlock_irq(&ide_lock);
 617         mutex_unlock(&ide_cfg_mtx);
 618 }
 619
 620 EXPORT_SYMBOL(ide_unregister);
 621
 622
 623 /**
 624  *      ide_setup_ports         -       set up IDE interface ports
 625  *      @hw: register descriptions
 626  *      @base: base register
 627  *      @offsets: table of register offsets
 628  *      @ctrl: control register
 629  *      @ack_irq: IRQ ack
 630  *      @irq: interrupt lie
 631  *
 632  *      Setup hw_regs_t structure described by parameters.  You
 633  *      may set up the hw structure yourself OR use this routine to
 634  *      do it for you. This is basically a helper
 635  *
 636  */
 637
 638 void ide_setup_ports (  hw_regs_t *hw,
 639                         unsigned long base, int *offsets,
 640                         unsigned long ctrl, unsigned long intr,
 641                         ide_ack_intr_t *ack_intr,
 642 /*
 643  *                      ide_io_ops_t *iops,
 644  */
 645                         int irq)
 646 {
 647         int i;
 648
 649         memset(hw, 0, sizeof(hw_regs_t));
 650         for (i = 0; i < IDE_NR_PORTS; i++) {
 651                 if (offsets[i] == -1) {
 652                         switch(i) {
 653                                 case IDE_CONTROL_OFFSET:
 654                                         hw->io_ports[i] = ctrl;
 655                                         break;
 656 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
 657                                 case IDE_IRQ_OFFSET:
 658                                         hw->io_ports[i] = intr;
 659                                         break;
 660 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
 661                                 default:
 662                                         hw->io_ports[i] = 0;
 663                                         break;
 664                         }
 665                 } else {
 666                         hw->io_ports[i] = base + offsets[i];
 667                 }
 668         }
 669         hw->irq = irq;
 670         hw->ack_intr = ack_intr;
 671 /*
 672  *      hw->iops = iops;
 673  */
 674 }
 675
 676 void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw)
 677 {
 678         memcpy(hwif->io_ports, hw->io_ports, sizeof(hwif->io_ports));
 679         hwif->irq = hw->irq;
 680         hwif->noprobe = 0;
 681         hwif->chipset = hw->chipset;
 682         hwif->gendev.parent = hw->dev;
 683         hwif->ack_intr = hw->ack_intr;
 684 }
 685 EXPORT_SYMBOL_GPL(ide_init_port_hw);
 686
 687 /**
 688  *      ide_register_hw         -       register IDE interface
 689  *      @hw: hardware registers
 690  *      @quirkproc: quirkproc function
 691  *      @hwifp: pointer to returned hwif
 692  *
 693  *      Register an IDE interface, specifying exactly the registers etc.
 694  *
 695  *      Returns -1 on error.
 696  */
 697
 698 int ide_register_hw(hw_regs_t *hw, void (*quirkproc)(ide_drive_t *),
 699                     ide_hwif_t **hwifp)
 700 {
 701         int index, retry = 1;
 702         ide_hwif_t *hwif;
 703         u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
 704
 705         do {
 706                 for (index = 0; index < MAX_HWIFS; ++index) {
 707                         hwif = &ide_hwifs[index];
 708                         if (hwif->io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
 709                                 goto found;
 710                 }
 711                 for (index = 0; index < MAX_HWIFS; ++index) {
 712                         hwif = &ide_hwifs[index];
 713                         if (hwif->hold)
 714                                 continue;
 715                         if (!hwif->present && hwif->mate == NULL)
 716                                 goto found;
 717                 }
 718                 for (index = 0; index < MAX_HWIFS; index++)
 719                         ide_unregister(index);
 720         } while (retry--);
 721         return -1;
 722 found:
 723         if (hwif->present)
 724                 ide_unregister(index);
 725         else if (!hwif->hold) {
 726                 ide_init_port_data(hwif, index);
 727                 init_hwif_default(hwif, index);
 728         }
 729         if (hwif->present)
 730                 return -1;
 731
 732         ide_init_port_hw(hwif, hw);
 733         hwif->quirkproc = quirkproc;
 734
 735         idx[0] = index;
 736
 737         ide_device_add(idx);
 738
 739         if (hwifp)
 740                 *hwifp = hwif;
 741
 742         return hwif->present ? index : -1;
 743 }
 744
 745 EXPORT_SYMBOL(ide_register_hw);
 746
 747 /*
 748  *      Locks for IDE setting functionality
 749  */
 750
 751 DEFINE_MUTEX(ide_setting_mtx);
 752
 753 EXPORT_SYMBOL_GPL(ide_setting_mtx);
 754
 755 /**
 756  *      ide_spin_wait_hwgroup   -       wait for group
 757  *      @drive: drive in the group
 758  *
 759  *      Wait for an IDE device group to go non busy and then return
 760  *      holding the ide_lock which guards the hwgroup->busy status
 761  *      and right to use it.
 762  */
 763
 764 int ide_spin_wait_hwgroup (ide_drive_t *drive)
 765 {
 766         ide_hwgroup_t *hwgroup = HWGROUP(drive);
 767         unsigned long timeout = jiffies + (3 * HZ);
 768
 769         spin_lock_irq(&ide_lock);
 770
 771         while (hwgroup->busy) {
 772                 unsigned long lflags;
 773                 spin_unlock_irq(&ide_lock);
 774                 local_irq_set(lflags);
 775                 if (time_after(jiffies, timeout)) {
 776                         local_irq_restore(lflags);
 777                         printk(KERN_ERR "%s: channel busy\n", drive->name);
 778                         return -EBUSY;
 779                 }
 780                 local_irq_restore(lflags);
 781                 spin_lock_irq(&ide_lock);
 782         }
 783         return 0;
 784 }
 785
 786 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
 787
 788 int set_io_32bit(ide_drive_t *drive, int arg)
 789 {
 790         if (drive->no_io_32bit)
 791                 return -EPERM;
 792
 793         if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
 794                 return -EINVAL;
 795
 796         if (ide_spin_wait_hwgroup(drive))
 797                 return -EBUSY;
 798
 799         drive->io_32bit = arg;
 800 #ifdef CONFIG_BLK_DEV_DTC2278
 801         if (HWIF(drive)->chipset == ide_dtc2278)
 802                 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
 803 #endif /* CONFIG_BLK_DEV_DTC2278 */
 804
 805         spin_unlock_irq(&ide_lock);
 806
 807         return 0;
 808 }
 809
 810 static int set_ksettings(ide_drive_t *drive, int arg)
 811 {
 812         if (arg < 0 || arg > 1)
 813                 return -EINVAL;
 814
 815         if (ide_spin_wait_hwgroup(drive))
 816                 return -EBUSY;
 817         drive->keep_settings = arg;
 818         spin_unlock_irq(&ide_lock);
 819
 820         return 0;
 821 }
 822
 823 int set_using_dma(ide_drive_t *drive, int arg)
 824 {
 825 #ifdef CONFIG_BLK_DEV_IDEDMA
 826         ide_hwif_t *hwif = drive->hwif;
 827         int err = -EPERM;
 828
 829         if (arg < 0 || arg > 1)
 830                 return -EINVAL;
 831
 832         if (!drive->id || !(drive->id->capability & 1))
 833                 goto out;
 834
 835         if (hwif->dma_host_set == NULL)
 836                 goto out;
 837
 838         err = -EBUSY;
 839         if (ide_spin_wait_hwgroup(drive))
 840                 goto out;
 841         /*
 842          * set ->busy flag, unlock and let it ride
 843          */
 844         hwif->hwgroup->busy = 1;
 845         spin_unlock_irq(&ide_lock);
 846
 847         err = 0;
 848
 849         if (arg) {
 850                 if (ide_set_dma(drive))
 851                         err = -EIO;
 852         } else
 853                 ide_dma_off(drive);
 854
 855         /*
 856          * lock, clear ->busy flag and unlock before leaving
 857          */
 858         spin_lock_irq(&ide_lock);
 859         hwif->hwgroup->busy = 0;
 860         spin_unlock_irq(&ide_lock);
 861 out:
 862         return err;
 863 #else
 864         if (arg < 0 || arg > 1)
 865                 return -EINVAL;
 866
 867         return -EPERM;
 868 #endif
 869 }
 870
 871 int set_pio_mode(ide_drive_t *drive, int arg)
 872 {
 873         struct request rq;
 874
 875         if (arg < 0 || arg > 255)
 876                 return -EINVAL;
 877
 878         if (drive->hwif->set_pio_mode == NULL)
 879                 return -ENOSYS;
 880
 881         if (drive->special.b.set_tune)
 882                 return -EBUSY;
 883         ide_init_drive_cmd(&rq);
 884         drive->tune_req = (u8) arg;
 885         drive->special.b.set_tune = 1;
 886         (void) ide_do_drive_cmd(drive, &rq, ide_wait);
 887         return 0;
 888 }
 889
 890 static int set_unmaskirq(ide_drive_t *drive, int arg)
 891 {
 892         if (drive->no_unmask)
 893                 return -EPERM;
 894
 895         if (arg < 0 || arg > 1)
 896                 return -EINVAL;
 897
 898         if (ide_spin_wait_hwgroup(drive))
 899                 return -EBUSY;
 900         drive->unmask = arg;
 901         spin_unlock_irq(&ide_lock);
 902
 903         return 0;
 904 }
 905
 906 /**
 907  *      system_bus_clock        -       clock guess
 908  *
 909  *      External version of the bus clock guess used by very old IDE drivers
 910  *      for things like VLB timings. Should not be used.
 911  */
 912
 913 int system_bus_clock (void)
 914 {
 915         return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
 916 }
 917
 918 EXPORT_SYMBOL(system_bus_clock);
 919
 920 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
 921 {
 922         ide_drive_t *drive = dev->driver_data;
 923         ide_hwif_t *hwif = HWIF(drive);
 924         struct request rq;
 925         struct request_pm_state rqpm;
 926         ide_task_t args;
 927         int ret;
 928
 929         /* Call ACPI _GTM only once */
 930         if (!(drive->dn % 2))
 931                 ide_acpi_get_timing(hwif);
 932
 933         memset(&rq, 0, sizeof(rq));
 934         memset(&rqpm, 0, sizeof(rqpm));
 935         memset(&args, 0, sizeof(args));
 936         rq.cmd_type = REQ_TYPE_PM_SUSPEND;
 937         rq.special = &args;
 938         rq.data = &rqpm;
 939         rqpm.pm_step = ide_pm_state_start_suspend;
 940         if (mesg.event == PM_EVENT_PRETHAW)
 941                 mesg.event = PM_EVENT_FREEZE;
 942         rqpm.pm_state = mesg.event;
 943
 944         ret = ide_do_drive_cmd(drive, &rq, ide_wait);
 945         /* only call ACPI _PS3 after both drivers are suspended */
 946         if (!ret && (((drive->dn % 2) && hwif->drives[0].present
 947                  && hwif->drives[1].present)
 948                  || !hwif->drives[0].present
 949                  || !hwif->drives[1].present))
 950                 ide_acpi_set_state(hwif, 0);
 951         return ret;
 952 }
 953
 954 static int generic_ide_resume(struct device *dev)
 955 {
 956         ide_drive_t *drive = dev->driver_data;
 957         ide_hwif_t *hwif = HWIF(drive);
 958         struct request rq;
 959         struct request_pm_state rqpm;
 960         ide_task_t args;
 961         int err;
 962
 963         /* Call ACPI _STM only once */
 964         if (!(drive->dn % 2)) {
 965                 ide_acpi_set_state(hwif, 1);
 966                 ide_acpi_push_timing(hwif);
 967         }
 968
 969         ide_acpi_exec_tfs(drive);
 970
 971         memset(&rq, 0, sizeof(rq));
 972         memset(&rqpm, 0, sizeof(rqpm));
 973         memset(&args, 0, sizeof(args));
 974         rq.cmd_type = REQ_TYPE_PM_RESUME;
 975         rq.special = &args;
 976         rq.data = &rqpm;
 977         rqpm.pm_step = ide_pm_state_start_resume;
 978         rqpm.pm_state = PM_EVENT_ON;
 979
 980         err = ide_do_drive_cmd(drive, &rq, ide_head_wait);
 981
 982         if (err == 0 && dev->driver) {
 983                 ide_driver_t *drv = to_ide_driver(dev->driver);
 984
 985                 if (drv->resume)
 986                         drv->resume(drive);
 987         }
 988
 989         return err;
 990 }
 991
 992 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
 993                         unsigned int cmd, unsigned long arg)
 994 {
 995         unsigned long flags;
 996         ide_driver_t *drv;
 997         void __user *p = (void __user *)arg;
 998         int err = 0, (*setfunc)(ide_drive_t *, int);
 999         u8 *val;
1000
1001         switch (cmd) {
1002         case HDIO_GET_32BIT:        val = &drive->io_32bit;      goto read_val;
1003         case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
1004         case HDIO_GET_UNMASKINTR:   val = &drive->unmask;        goto read_val;
1005         case HDIO_GET_DMA:          val = &drive->using_dma;     goto read_val;
1006         case HDIO_SET_32BIT:        setfunc = set_io_32bit;      goto set_val;
1007         case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings;     goto set_val;
1008         case HDIO_SET_PIO_MODE:     setfunc = set_pio_mode;      goto set_val;
1009         case HDIO_SET_UNMASKINTR:   setfunc = set_unmaskirq;     goto set_val;
1010         case HDIO_SET_DMA:          setfunc = set_using_dma;     goto set_val;
1011         }
1012
1013         switch (cmd) {
1014                 case HDIO_OBSOLETE_IDENTITY:
1015                 case HDIO_GET_IDENTITY:
1016                         if (bdev != bdev->bd_contains)
1017                                 return -EINVAL;
1018                         if (drive->id_read == 0)
1019                                 return -ENOMSG;
1020                         if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1021                                 return -EFAULT;
1022                         return 0;
1023
1024                 case HDIO_GET_NICE:
1025                         return put_user(drive->dsc_overlap      <<      IDE_NICE_DSC_OVERLAP    |
1026                                         drive->atapi_overlap    <<      IDE_NICE_ATAPI_OVERLAP  |
1027                                         drive->nice0            <<      IDE_NICE_0              |
1028                                         drive->nice1            <<      IDE_NICE_1              |
1029                                         drive->nice2            <<      IDE_NICE_2,
1030                                         (long __user *) arg);
1031
1032 #ifdef CONFIG_IDE_TASK_IOCTL
1033                 case HDIO_DRIVE_TASKFILE:
1034                         if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1035                                 return -EACCES;
1036                         switch(drive->media) {
1037                                 case ide_disk:
1038                                         return ide_taskfile_ioctl(drive, cmd, arg);
1039                                 default:
1040                                         return -ENOMSG;
1041                         }
1042 #endif /* CONFIG_IDE_TASK_IOCTL */
1043
1044                 case HDIO_DRIVE_CMD:
1045                         if (!capable(CAP_SYS_RAWIO))
1046                                 return -EACCES;
1047                         return ide_cmd_ioctl(drive, cmd, arg);
1048
1049                 case HDIO_DRIVE_TASK:
1050                         if (!capable(CAP_SYS_RAWIO))
1051                                 return -EACCES;
1052                         return ide_task_ioctl(drive, cmd, arg);
1053
1054                 case HDIO_SCAN_HWIF:
1055                 {
1056                         hw_regs_t hw;
1057                         int args[3];
1058                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1059                         if (copy_from_user(args, p, 3 * sizeof(int)))
1060                                 return -EFAULT;
1061                         memset(&hw, 0, sizeof(hw));
1062                         ide_init_hwif_ports(&hw, (unsigned long) args[0],
1063                                             (unsigned long) args[1], NULL);
1064                         hw.irq = args[2];
1065                         if (ide_register_hw(&hw, NULL, NULL) == -1)
1066                                 return -EIO;
1067                         return 0;
1068                 }
1069                 case HDIO_UNREGISTER_HWIF:
1070                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1071                         /* (arg > MAX_HWIFS) checked in function */
1072                         ide_unregister(arg);
1073                         return 0;
1074                 case HDIO_SET_NICE:
1075                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1076                         if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1077                                 return -EPERM;
1078                         drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1079                         drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1080                         if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1081                                 drive->dsc_overlap = 0;
1082                                 return -EPERM;
1083                         }
1084                         drive->nice1 = (arg >> IDE_NICE_1) & 1;
1085                         return 0;
1086                 case HDIO_DRIVE_RESET:
1087                 {
1088                         unsigned long flags;
1089                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1090
1091                         /*
1092                          *      Abort the current command on the
1093                          *      group if there is one, taking
1094                          *      care not to allow anything else
1095                          *      to be queued and to die on the
1096                          *      spot if we miss one somehow
1097                          */
1098
1099                         spin_lock_irqsave(&ide_lock, flags);
1100
1101                         if (HWGROUP(drive)->resetting) {
1102                                 spin_unlock_irqrestore(&ide_lock, flags);
1103                                 return -EBUSY;
1104                         }
1105
1106                         ide_abort(drive, "drive reset");
1107
1108                         BUG_ON(HWGROUP(drive)->handler);
1109
1110                         /* Ensure nothing gets queued after we
1111                            drop the lock. Reset will clear the busy */
1112
1113                         HWGROUP(drive)->busy = 1;
1114                         spin_unlock_irqrestore(&ide_lock, flags);
1115                         (void) ide_do_reset(drive);
1116
1117                         return 0;
1118                 }
1119
1120                 case HDIO_GET_BUSSTATE:
1121                         if (!capable(CAP_SYS_ADMIN))
1122                                 return -EACCES;
1123                         if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1124                                 return -EFAULT;
1125                         return 0;
1126
1127                 case HDIO_SET_BUSSTATE:
1128                         if (!capable(CAP_SYS_ADMIN))
1129                                 return -EACCES;
1130                         if (HWIF(drive)->busproc)
1131                                 return HWIF(drive)->busproc(drive, (int)arg);
1132                         return -EOPNOTSUPP;
1133                 default:
1134                         return -EINVAL;
1135         }
1136
1137 read_val:
1138         mutex_lock(&ide_setting_mtx);
1139         spin_lock_irqsave(&ide_lock, flags);
1140         err = *val;
1141         spin_unlock_irqrestore(&ide_lock, flags);
1142         mutex_unlock(&ide_setting_mtx);
1143         return err >= 0 ? put_user(err, (long __user *)arg) : err;
1144
1145 set_val:
1146         if (bdev != bdev->bd_contains)
1147                 err = -EINVAL;
1148         else {
1149                 if (!capable(CAP_SYS_ADMIN))
1150                         err = -EACCES;
1151                 else {
1152                         mutex_lock(&ide_setting_mtx);
1153                         err = setfunc(drive, arg);
1154                         mutex_unlock(&ide_setting_mtx);
1155                 }
1156         }
1157         return err;
1158 }
1159
1160 EXPORT_SYMBOL(generic_ide_ioctl);
1161
1162 /*
1163  * stridx() returns the offset of c within s,
1164  * or -1 if c is '\0' or not found within s.
1165  */
1166 static int __init stridx (const char *s, char c)
1167 {
1168         char *i = strchr(s, c);
1169         return (i && c) ? i - s : -1;
1170 }
1171
1172 /*
1173  * match_parm() does parsing for ide_setup():
1174  *
1175  * 1. the first char of s must be '='.
1176  * 2. if the remainder matches one of the supplied keywords,
1177  *     the index (1 based) of the keyword is negated and returned.
1178  * 3. if the remainder is a series of no more than max_vals numbers
1179  *     separated by commas, the numbers are saved in vals[] and a
1180  *     count of how many were saved is returned.  Base10 is assumed,
1181  *     and base16 is allowed when prefixed with "0x".
1182  * 4. otherwise, zero is returned.
1183  */
1184 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1185 {
1186         static const char *decimal = "0123456789";
1187         static const char *hex = "0123456789abcdef";
1188         int i, n;
1189
1190         if (*s++ == '=') {
1191                 /*
1192                  * Try matching against the supplied keywords,
1193                  * and return -(index+1) if we match one
1194                  */
1195                 if (keywords != NULL) {
1196                         for (i = 0; *keywords != NULL; ++i) {
1197                                 if (!strcmp(s, *keywords++))
1198                                         return -(i+1);
1199                         }
1200                 }
1201                 /*
1202                  * Look for a series of no more than "max_vals"
1203                  * numeric values separated by commas, in base10,
1204                  * or base16 when prefixed with "0x".
1205                  * Return a count of how many were found.
1206                  */
1207                 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1208                         vals[n] = i;
1209                         while ((i = stridx(decimal, *++s)) >= 0)
1210                                 vals[n] = (vals[n] * 10) + i;
1211                         if (*s == 'x' && !vals[n]) {
1212                                 while ((i = stridx(hex, *++s)) >= 0)
1213                                         vals[n] = (vals[n] * 0x10) + i;
1214                         }
1215                         if (++n == max_vals)
1216                                 break;
1217                         if (*s == ',' || *s == ';')
1218                                 ++s;
1219                 }
1220                 if (!*s)
1221                         return n;
1222         }
1223         return 0;       /* zero = nothing matched */
1224 }
1225
1226 #ifdef CONFIG_BLK_DEV_ALI14XX
1227 extern int probe_ali14xx;
1228 extern int ali14xx_init(void);
1229 #endif
1230 #ifdef CONFIG_BLK_DEV_UMC8672
1231 extern int probe_umc8672;
1232 extern int umc8672_init(void);
1233 #endif
1234 #ifdef CONFIG_BLK_DEV_DTC2278
1235 extern int probe_dtc2278;
1236 extern int dtc2278_init(void);
1237 #endif
1238 #ifdef CONFIG_BLK_DEV_HT6560B
1239 extern int probe_ht6560b;
1240 extern int ht6560b_init(void);
1241 #endif
1242 #ifdef CONFIG_BLK_DEV_QD65XX
1243 extern int probe_qd65xx;
1244 extern int qd65xx_init(void);
1245 #endif
1246
1247 static int __initdata is_chipset_set[MAX_HWIFS];
1248
1249 /*
1250  * ide_setup() gets called VERY EARLY during initialization,
1251  * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1252  *
1253  * Remember to update Documentation/ide.txt if you change something here.
1254  */
1255 static int __init ide_setup(char *s)
1256 {
1257         int i, vals[3];
1258         ide_hwif_t *hwif;
1259         ide_drive_t *drive;
1260         unsigned int hw, unit;
1261         const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1262         const char max_hwif  = '0' + (MAX_HWIFS - 1);
1263
1264
1265         if (strncmp(s,"hd",2) == 0 && s[2] == '=')      /* hd= is for hd.c   */
1266                 return 0;                               /* driver and not us */
1267
1268         if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1269                 return 0;
1270
1271         printk(KERN_INFO "ide_setup: %s", s);
1272         init_ide_data ();
1273
1274 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1275         if (!strcmp(s, "ide=doubler")) {
1276                 extern int ide_doubler;
1277
1278                 printk(" : Enabled support for IDE doublers\n");
1279                 ide_doubler = 1;
1280                 return 1;
1281         }
1282 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1283
1284         if (!strcmp(s, "ide=nodma")) {
1285                 printk(" : Prevented DMA\n");
1286                 noautodma = 1;
1287                 goto obsolete_option;
1288         }
1289
1290 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1291         if (!strcmp(s, "ide=reverse")) {
1292                 ide_scan_direction = 1;
1293                 printk(" : Enabled support for IDE inverse scan order.\n");
1294                 return 1;
1295         }
1296 #endif
1297
1298 #ifdef CONFIG_BLK_DEV_IDEACPI
1299         if (!strcmp(s, "ide=noacpi")) {
1300                 //printk(" : Disable IDE ACPI support.\n");
1301                 ide_noacpi = 1;
1302                 return 1;
1303         }
1304         if (!strcmp(s, "ide=acpigtf")) {
1305                 //printk(" : Enable IDE ACPI _GTF support.\n");
1306                 ide_noacpitfs = 0;
1307                 return 1;
1308         }
1309         if (!strcmp(s, "ide=acpionboot")) {
1310                 //printk(" : Call IDE ACPI methods on boot.\n");
1311                 ide_noacpionboot = 0;
1312                 return 1;
1313         }
1314 #endif /* CONFIG_BLK_DEV_IDEACPI */
1315
1316         /*
1317          * Look for drive options:  "hdx="
1318          */
1319         if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1320                 const char *hd_words[] = {
1321                         "none", "noprobe", "nowerr", "cdrom", "nodma",
1322                         "autotune", "noautotune", "minus8", "swapdata", "bswap",
1323                         "noflush", "remap", "remap63", "scsi", NULL };
1324                 unit = s[2] - 'a';
1325                 hw   = unit / MAX_DRIVES;
1326                 unit = unit % MAX_DRIVES;
1327                 hwif = &ide_hwifs[hw];
1328                 drive = &hwif->drives[unit];
1329                 if (strncmp(s + 4, "ide-", 4) == 0) {
1330                         strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1331                         goto done;
1332                 }
1333                 switch (match_parm(&s[3], hd_words, vals, 3)) {
1334                         case -1: /* "none" */
1335                         case -2: /* "noprobe" */
1336                                 drive->noprobe = 1;
1337                                 goto done;
1338                         case -3: /* "nowerr" */
1339                                 drive->bad_wstat = BAD_R_STAT;
1340                                 hwif->noprobe = 0;
1341                                 goto done;
1342                         case -4: /* "cdrom" */
1343                                 drive->present = 1;
1344                                 drive->media = ide_cdrom;
1345                                 /* an ATAPI device ignores DRDY */
1346                                 drive->ready_stat = 0;
1347                                 hwif->noprobe = 0;
1348                                 goto done;
1349                         case -5: /* nodma */
1350                                 drive->nodma = 1;
1351                                 goto done;
1352                         case -6: /* "autotune" */
1353                                 drive->autotune = IDE_TUNE_AUTO;
1354                                 goto obsolete_option;
1355                         case -7: /* "noautotune" */
1356                                 drive->autotune = IDE_TUNE_NOAUTO;
1357                                 goto obsolete_option;
1358                         case -9: /* "swapdata" */
1359                         case -10: /* "bswap" */
1360                                 drive->bswap = 1;
1361                                 goto done;
1362                         case -11: /* noflush */
1363                                 drive->noflush = 1;
1364                                 goto done;
1365                         case -12: /* "remap" */
1366                                 drive->remap_0_to_1 = 1;
1367                                 goto done;
1368                         case -13: /* "remap63" */
1369                                 drive->sect0 = 63;
1370                                 goto done;
1371                         case -14: /* "scsi" */
1372                                 drive->scsi = 1;
1373                                 goto done;
1374                         case 3: /* cyl,head,sect */
1375                                 drive->media    = ide_disk;
1376                                 drive->ready_stat = READY_STAT;
1377                                 drive->cyl      = drive->bios_cyl  = vals[0];
1378                                 drive->head     = drive->bios_head = vals[1];
1379                                 drive->sect     = drive->bios_sect = vals[2];
1380                                 drive->present  = 1;
1381                                 drive->forced_geom = 1;
1382                                 hwif->noprobe = 0;
1383                                 goto done;
1384                         default:
1385                                 goto bad_option;
1386                 }
1387         }
1388
1389         if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1390                 goto bad_option;
1391         /*
1392          * Look for bus speed option:  "idebus="
1393          */
1394         if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1395                 if (match_parm(&s[6], NULL, vals, 1) != 1)
1396                         goto bad_option;
1397                 if (vals[0] >= 20 && vals[0] <= 66) {
1398                         idebus_parameter = vals[0];
1399                 } else
1400                         printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1401                 goto done;
1402         }
1403         /*
1404          * Look for interface options:  "idex="
1405          */
1406         if (s[3] >= '0' && s[3] <= max_hwif) {
1407                 /*
1408                  * Be VERY CAREFUL changing this: note hardcoded indexes below
1409                  * (-8, -9, -10) are reserved to ease the hardcoding.
1410                  */
1411                 static const char *ide_words[] = {
1412                         "noprobe", "serialize", "minus3", "minus4",
1413                         "reset", "minus6", "ata66", "minus8", "minus9",
1414                         "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1415                         "dtc2278", "umc8672", "ali14xx", NULL };
1416
1417                 hw_regs_t hwregs;
1418
1419                 hw = s[3] - '0';
1420                 hwif = &ide_hwifs[hw];
1421                 i = match_parm(&s[4], ide_words, vals, 3);
1422
1423                 /*
1424                  * Cryptic check to ensure chipset not already set for hwif.
1425                  * Note: we can't depend on hwif->chipset here.
1426                  */
1427                 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1428                         /* chipset already specified */
1429                         if (is_chipset_set[hw])
1430                                 goto bad_option;
1431                         if (i > -18 && i <= -11) {
1432                                 /* these drivers are for "ide0=" only */
1433                                 if (hw != 0)
1434                                         goto bad_hwif;
1435                                 /* chipset already specified for 2nd port */
1436                                 if (is_chipset_set[hw+1])
1437                                         goto bad_option;
1438                         }
1439                         is_chipset_set[hw] = 1;
1440                         printk("\n");
1441                 }
1442
1443                 switch (i) {
1444 #ifdef CONFIG_BLK_DEV_ALI14XX
1445                         case -17: /* "ali14xx" */
1446                                 probe_ali14xx = 1;
1447                                 goto done;
1448 #endif
1449 #ifdef CONFIG_BLK_DEV_UMC8672
1450                         case -16: /* "umc8672" */
1451                                 probe_umc8672 = 1;
1452                                 goto done;
1453 #endif
1454 #ifdef CONFIG_BLK_DEV_DTC2278
1455                         case -15: /* "dtc2278" */
1456                                 probe_dtc2278 = 1;
1457                                 goto done;
1458 #endif
1459 #ifdef CONFIG_BLK_DEV_CMD640
1460                         case -14: /* "cmd640_vlb" */
1461                         {
1462                                 extern int cmd640_vlb; /* flag for cmd640.c */
1463                                 cmd640_vlb = 1;
1464                                 goto done;
1465                         }
1466 #endif
1467 #ifdef CONFIG_BLK_DEV_HT6560B
1468                         case -13: /* "ht6560b" */
1469                                 probe_ht6560b = 1;
1470                                 goto done;
1471 #endif
1472 #ifdef CONFIG_BLK_DEV_QD65XX
1473                         case -12: /* "qd65xx" */
1474                                 probe_qd65xx = 1;
1475                                 goto done;
1476 #endif
1477 #ifdef CONFIG_BLK_DEV_4DRIVES
1478                         case -11: /* "four" drives on one set of ports */
1479                         {
1480                                 ide_hwif_t *mate = &ide_hwifs[hw^1];
1481                                 mate->drives[0].select.all ^= 0x20;
1482                                 mate->drives[1].select.all ^= 0x20;
1483                                 hwif->chipset = mate->chipset = ide_4drives;
1484                                 mate->irq = hwif->irq;
1485                                 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1486                                 hwif->mate = mate;
1487                                 mate->mate = hwif;
1488                                 hwif->serialized = mate->serialized = 1;
1489                                 goto obsolete_option;
1490                         }
1491 #endif /* CONFIG_BLK_DEV_4DRIVES */
1492                         case -10: /* minus10 */
1493                         case -9: /* minus9 */
1494                         case -8: /* minus8 */
1495                         case -6:
1496                         case -4:
1497                         case -3:
1498                                 goto bad_option;
1499                         case -7: /* ata66 */
1500 #ifdef CONFIG_BLK_DEV_IDEPCI
1501                                 /*
1502                                  * Use ATA_CBL_PATA40_SHORT so drive side
1503                                  * cable detection is also overriden.
1504                                  */
1505                                 hwif->cbl = ATA_CBL_PATA40_SHORT;
1506                                 goto obsolete_option;
1507 #else
1508                                 goto bad_hwif;
1509 #endif
1510                         case -5: /* "reset" */
1511                                 hwif->reset = 1;
1512                                 goto obsolete_option;
1513                         case -2: /* "serialize" */
1514                                 hwif->mate = &ide_hwifs[hw^1];
1515                                 hwif->mate->mate = hwif;
1516                                 hwif->serialized = hwif->mate->serialized = 1;
1517                                 goto obsolete_option;
1518
1519                         case -1: /* "noprobe" */
1520                                 hwif->noprobe = 1;
1521                                 goto done;
1522
1523                         case 1: /* base */
1524                                 vals[1] = vals[0] + 0x206; /* default ctl */
1525                         case 2: /* base,ctl */
1526                                 vals[2] = 0;    /* default irq = probe for it */
1527                         case 3: /* base,ctl,irq */
1528                                 memset(&hwregs, 0, sizeof(hwregs));
1529                                 ide_init_hwif_ports(&hwregs, vals[0], vals[1], &hwif->irq);
1530                                 memcpy(hwif->io_ports, hwregs.io_ports, sizeof(hwif->io_ports));
1531                                 hwif->irq      = vals[2];
1532                                 hwif->noprobe  = 0;
1533                                 hwif->chipset  = ide_forced;
1534                                 goto obsolete_option;
1535
1536                         case 0: goto bad_option;
1537                         default:
1538                                 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1539                                 return 1;
1540                 }
1541         }
1542 bad_option:
1543         printk(" -- BAD OPTION\n");
1544         return 1;
1545 obsolete_option:
1546         printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1547         return 1;
1548 bad_hwif:
1549         printk("-- NOT SUPPORTED ON ide%d", hw);
1550 done:
1551         printk("\n");
1552         return 1;
1553 }
1554
1555 extern void __init pnpide_init(void);
1556 extern void __exit pnpide_exit(void);
1557 extern void __init h8300_ide_init(void);
1558 extern void __init mpc8xx_ide_probe(void);
1559
1560 /*
1561  * probe_for_hwifs() finds/initializes "known" IDE interfaces
1562  */
1563 static void __init probe_for_hwifs (void)
1564 {
1565 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1566         ide_scan_pcibus(ide_scan_direction);
1567 #endif
1568
1569 #ifdef CONFIG_ETRAX_IDE
1570         {
1571                 extern void init_e100_ide(void);
1572                 init_e100_ide();
1573         }
1574 #endif /* CONFIG_ETRAX_IDE */
1575 #ifdef CONFIG_BLK_DEV_CMD640
1576         {
1577                 extern void ide_probe_for_cmd640x(void);
1578                 ide_probe_for_cmd640x();
1579         }
1580 #endif /* CONFIG_BLK_DEV_CMD640 */
1581 #ifdef CONFIG_BLK_DEV_IDE_PMAC
1582         {
1583                 extern int pmac_ide_probe(void);
1584                 (void)pmac_ide_probe();
1585         }
1586 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
1587 #ifdef CONFIG_BLK_DEV_GAYLE
1588         {
1589                 extern void gayle_init(void);
1590                 gayle_init();
1591         }
1592 #endif /* CONFIG_BLK_DEV_GAYLE */
1593 #ifdef CONFIG_BLK_DEV_FALCON_IDE
1594         {
1595                 extern void falconide_init(void);
1596                 falconide_init();
1597         }
1598 #endif /* CONFIG_BLK_DEV_FALCON_IDE */
1599 #ifdef CONFIG_BLK_DEV_MAC_IDE
1600         {
1601                 extern void macide_init(void);
1602                 macide_init();
1603         }
1604 #endif /* CONFIG_BLK_DEV_MAC_IDE */
1605 #ifdef CONFIG_BLK_DEV_Q40IDE
1606         {
1607                 extern void q40ide_init(void);
1608                 q40ide_init();
1609         }
1610 #endif /* CONFIG_BLK_DEV_Q40IDE */
1611 #ifdef CONFIG_BLK_DEV_BUDDHA
1612         {
1613                 extern void buddha_init(void);
1614                 buddha_init();
1615         }
1616 #endif /* CONFIG_BLK_DEV_BUDDHA */
1617 #ifdef CONFIG_BLK_DEV_IDEPNP
1618         pnpide_init();
1619 #endif
1620 #ifdef CONFIG_H8300
1621         h8300_ide_init();
1622 #endif
1623 #ifdef BLK_DEV_MPC8xx_IDE
1624         mpc8xx_ide_probe();
1625 #endif
1626 }
1627
1628 /*
1629  * Probe module
1630  */
1631
1632 EXPORT_SYMBOL(ide_lock);
1633
1634 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1635 {
1636         return 1;
1637 }
1638
1639 static char *media_string(ide_drive_t *drive)
1640 {
1641         switch (drive->media) {
1642         case ide_disk:
1643                 return "disk";
1644         case ide_cdrom:
1645                 return "cdrom";
1646         case ide_tape:
1647                 return "tape";
1648         case ide_floppy:
1649                 return "floppy";
1650         case ide_optical:
1651                 return "optical";
1652         default:
1653                 return "UNKNOWN";
1654         }
1655 }
1656
1657 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1658 {
1659         ide_drive_t *drive = to_ide_device(dev);
1660         return sprintf(buf, "%s\n", media_string(drive));
1661 }
1662
1663 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1664 {
1665         ide_drive_t *drive = to_ide_device(dev);
1666         return sprintf(buf, "%s\n", drive->name);
1667 }
1668
1669 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1670 {
1671         ide_drive_t *drive = to_ide_device(dev);
1672         return sprintf(buf, "ide:m-%s\n", media_string(drive));
1673 }
1674
1675 static ssize_t model_show(struct device *dev, struct device_attribute *attr,
1676                           char *buf)
1677 {
1678         ide_drive_t *drive = to_ide_device(dev);
1679         return sprintf(buf, "%s\n", drive->id->model);
1680 }
1681
1682 static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
1683                              char *buf)
1684 {
1685         ide_drive_t *drive = to_ide_device(dev);
1686         return sprintf(buf, "%s\n", drive->id->fw_rev);
1687 }
1688
1689 static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
1690                            char *buf)
1691 {
1692         ide_drive_t *drive = to_ide_device(dev);
1693         return sprintf(buf, "%s\n", drive->id->serial_no);
1694 }
1695
1696 static struct device_attribute ide_dev_attrs[] = {
1697         __ATTR_RO(media),
1698         __ATTR_RO(drivename),
1699         __ATTR_RO(modalias),
1700         __ATTR_RO(model),
1701         __ATTR_RO(firmware),
1702         __ATTR(serial, 0400, serial_show, NULL),
1703         __ATTR_NULL
1704 };
1705
1706 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
1707 {
1708         ide_drive_t *drive = to_ide_device(dev);
1709
1710         add_uevent_var(env, "MEDIA=%s", media_string(drive));
1711         add_uevent_var(env, "DRIVENAME=%s", drive->name);
1712         add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
1713         return 0;
1714 }
1715
1716 static int generic_ide_probe(struct device *dev)
1717 {
1718         ide_drive_t *drive = to_ide_device(dev);
1719         ide_driver_t *drv = to_ide_driver(dev->driver);
1720
1721         return drv->probe ? drv->probe(drive) : -ENODEV;
1722 }
1723
1724 static int generic_ide_remove(struct device *dev)
1725 {
1726         ide_drive_t *drive = to_ide_device(dev);
1727         ide_driver_t *drv = to_ide_driver(dev->driver);
1728
1729         if (drv->remove)
1730                 drv->remove(drive);
1731
1732         return 0;
1733 }
1734
1735 static void generic_ide_shutdown(struct device *dev)
1736 {
1737         ide_drive_t *drive = to_ide_device(dev);
1738         ide_driver_t *drv = to_ide_driver(dev->driver);
1739
1740         if (dev->driver && drv->shutdown)
1741                 drv->shutdown(drive);
1742 }
1743
1744 struct bus_type ide_bus_type = {
1745         .name           = "ide",
1746         .match          = ide_bus_match,
1747         .uevent         = ide_uevent,
1748         .probe          = generic_ide_probe,
1749         .remove         = generic_ide_remove,
1750         .shutdown       = generic_ide_shutdown,
1751         .dev_attrs      = ide_dev_attrs,
1752         .suspend        = generic_ide_suspend,
1753         .resume         = generic_ide_resume,
1754 };
1755
1756 EXPORT_SYMBOL_GPL(ide_bus_type);
1757
1758 /*
1759  * This is gets invoked once during initialization, to set *everything* up
1760  */
1761 static int __init ide_init(void)
1762 {
1763         int ret;
1764
1765         printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
1766         system_bus_speed = ide_system_bus_speed();
1767
1768         ret = bus_register(&ide_bus_type);
1769         if (ret < 0) {
1770                 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1771                 return ret;
1772         }
1773
1774         init_ide_data();
1775
1776         proc_ide_create();
1777
1778 #ifdef CONFIG_IDE_ARM
1779         ide_arm_init();
1780 #endif
1781 #ifdef CONFIG_BLK_DEV_ALI14XX
1782         if (probe_ali14xx)
1783                 (void)ali14xx_init();
1784 #endif
1785 #ifdef CONFIG_BLK_DEV_UMC8672
1786         if (probe_umc8672)
1787                 (void)umc8672_init();
1788 #endif
1789 #ifdef CONFIG_BLK_DEV_DTC2278
1790         if (probe_dtc2278)
1791                 (void)dtc2278_init();
1792 #endif
1793 #ifdef CONFIG_BLK_DEV_HT6560B
1794         if (probe_ht6560b)
1795                 (void)ht6560b_init();
1796 #endif
1797 #ifdef CONFIG_BLK_DEV_QD65XX
1798         if (probe_qd65xx)
1799                 (void)qd65xx_init();
1800 #endif
1801
1802         /* Probe for special PCI and other "known" interface chipsets. */
1803         probe_for_hwifs();
1804
1805         return 0;
1806 }
1807
1808 #ifdef MODULE
1809 static char *options = NULL;
1810 module_param(options, charp, 0);
1811 MODULE_LICENSE("GPL");
1812
1813 static void __init parse_options (char *line)
1814 {
1815         char *next = line;
1816
1817         if (line == NULL || !*line)
1818                 return;
1819         while ((line = next) != NULL) {
1820                 if ((next = strchr(line,' ')) != NULL)
1821                         *next++ = 0;
1822                 if (!ide_setup(line))
1823                         printk (KERN_INFO "Unknown option '%s'\n", line);
1824         }
1825 }
1826
1827 int __init init_module (void)
1828 {
1829         parse_options(options);
1830         return ide_init();
1831 }
1832
1833 void __exit cleanup_module (void)
1834 {
1835         int index;
1836
1837         for (index = 0; index < MAX_HWIFS; ++index)
1838                 ide_unregister(index);
1839
1840 #ifdef CONFIG_BLK_DEV_IDEPNP
1841         pnpide_exit();
1842 #endif
1843
1844         proc_ide_destroy();
1845
1846         bus_unregister(&ide_bus_type);
1847 }
1848
1849 #else /* !MODULE */
1850
1851 __setup("", ide_setup);
1852
1853 module_init(ide_init);
1854
1855 #endif /* MODULE */