Pileus Git - ~andy/linux/blob - drivers/ide/ide.c

   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 static void init_hwif_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
 163 static void init_hwif_default(ide_hwif_t *hwif, unsigned int index)
 164 {
 165         hw_regs_t hw;
 166
 167         memset(&hw, 0, sizeof(hw_regs_t));
 168
 169         ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq);
 170
 171         memcpy(&hwif->hw, &hw, sizeof(hw));
 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                 init_hwif_data(hwif, index);
 215                 init_hwif_default(hwif, index);
 216 #if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
 217                 hwif->irq = hwif->hw.irq =
 218                         ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
 219 #endif
 220         }
 221 #ifdef CONFIG_IDE_ARM
 222         ide_arm_init();
 223 #endif
 224 }
 225
 226 /**
 227  *      ide_system_bus_speed    -       guess bus speed
 228  *
 229  *      ide_system_bus_speed() returns what we think is the system VESA/PCI
 230  *      bus speed (in MHz). This is used for calculating interface PIO timings.
 231  *      The default is 40 for known PCI systems, 50 otherwise.
 232  *      The "idebus=xx" parameter can be used to override this value.
 233  *      The actual value to be used is computed/displayed the first time
 234  *      through. Drivers should only use this as a last resort.
 235  *
 236  *      Returns a guessed speed in MHz.
 237  */
 238
 239 static int ide_system_bus_speed(void)
 240 {
 241 #ifdef CONFIG_PCI
 242         static struct pci_device_id pci_default[] = {
 243                 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
 244                 { }
 245         };
 246 #else
 247 #define pci_default 0
 248 #endif /* CONFIG_PCI */
 249
 250         if (!system_bus_speed) {
 251                 if (idebus_parameter) {
 252                         /* user supplied value */
 253                         system_bus_speed = idebus_parameter;
 254                 } else if (pci_dev_present(pci_default)) {
 255                         /* safe default value for PCI */
 256                         system_bus_speed = 33;
 257                 } else {
 258                         /* safe default value for VESA and PCI */
 259                         system_bus_speed = 50;
 260                 }
 261                 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
 262                         "for PIO modes%s\n", system_bus_speed,
 263                         idebus_parameter ? "" : "; override with idebus=xx");
 264         }
 265         return system_bus_speed;
 266 }
 267
 268 static struct resource* hwif_request_region(ide_hwif_t *hwif,
 269                                             unsigned long addr, int num)
 270 {
 271         struct resource *res = request_region(addr, num, hwif->name);
 272
 273         if (!res)
 274                 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
 275                                 hwif->name, addr, addr+num-1);
 276         return res;
 277 }
 278
 279 /**
 280  *      ide_hwif_request_regions - request resources for IDE
 281  *      @hwif: interface to use
 282  *
 283  *      Requests all the needed resources for an interface.
 284  *      Right now core IDE code does this work which is deeply wrong.
 285  *      MMIO leaves it to the controller driver,
 286  *      PIO will migrate this way over time.
 287  */
 288
 289 int ide_hwif_request_regions(ide_hwif_t *hwif)
 290 {
 291         unsigned long addr;
 292         unsigned int i;
 293
 294         if (hwif->mmio)
 295                 return 0;
 296         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
 297         if (addr && !hwif_request_region(hwif, addr, 1))
 298                 goto control_region_busy;
 299         hwif->straight8 = 0;
 300         addr = hwif->io_ports[IDE_DATA_OFFSET];
 301         if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
 302                 if (!hwif_request_region(hwif, addr, 8))
 303                         goto data_region_busy;
 304                 hwif->straight8 = 1;
 305                 return 0;
 306         }
 307         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
 308                 addr = hwif->io_ports[i];
 309                 if (!hwif_request_region(hwif, addr, 1)) {
 310                         while (--i)
 311                                 release_region(addr, 1);
 312                         goto data_region_busy;
 313                 }
 314         }
 315         return 0;
 316
 317 data_region_busy:
 318         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
 319         if (addr)
 320                 release_region(addr, 1);
 321 control_region_busy:
 322         /* If any errors are return, we drop the hwif interface. */
 323         return -EBUSY;
 324 }
 325
 326 /**
 327  *      ide_hwif_release_regions - free IDE resources
 328  *
 329  *      Note that we only release the standard ports,
 330  *      and do not even try to handle any extra ports
 331  *      allocated for weird IDE interface chipsets.
 332  *
 333  *      Note also that we don't yet handle mmio resources here. More
 334  *      importantly our caller should be doing this so we need to
 335  *      restructure this as a helper function for drivers.
 336  */
 337
 338 void ide_hwif_release_regions(ide_hwif_t *hwif)
 339 {
 340         u32 i = 0;
 341
 342         if (hwif->mmio)
 343                 return;
 344         if (hwif->io_ports[IDE_CONTROL_OFFSET])
 345                 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
 346         if (hwif->straight8) {
 347                 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
 348                 return;
 349         }
 350         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
 351                 if (hwif->io_ports[i])
 352                         release_region(hwif->io_ports[i], 1);
 353 }
 354
 355 /**
 356  *      ide_hwif_restore        -       restore hwif to template
 357  *      @hwif: hwif to update
 358  *      @tmp_hwif: template
 359  *
 360  *      Restore hwif to a previous state by copying most settings
 361  *      from the template.
 362  */
 363
 364 static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
 365 {
 366         hwif->hwgroup                   = tmp_hwif->hwgroup;
 367
 368         hwif->gendev.parent             = tmp_hwif->gendev.parent;
 369
 370         hwif->proc                      = tmp_hwif->proc;
 371
 372         hwif->major                     = tmp_hwif->major;
 373         hwif->straight8                 = tmp_hwif->straight8;
 374         hwif->bus_state                 = tmp_hwif->bus_state;
 375
 376         hwif->host_flags                = tmp_hwif->host_flags;
 377
 378         hwif->pio_mask                  = tmp_hwif->pio_mask;
 379
 380         hwif->ultra_mask                = tmp_hwif->ultra_mask;
 381         hwif->mwdma_mask                = tmp_hwif->mwdma_mask;
 382         hwif->swdma_mask                = tmp_hwif->swdma_mask;
 383
 384         hwif->cbl                       = tmp_hwif->cbl;
 385
 386         hwif->chipset                   = tmp_hwif->chipset;
 387         hwif->hold                      = tmp_hwif->hold;
 388
 389 #ifdef CONFIG_BLK_DEV_IDEPCI
 390         hwif->pci_dev                   = tmp_hwif->pci_dev;
 391         hwif->cds                       = tmp_hwif->cds;
 392 #endif
 393
 394         hwif->set_pio_mode              = tmp_hwif->set_pio_mode;
 395         hwif->set_dma_mode              = tmp_hwif->set_dma_mode;
 396         hwif->mdma_filter               = tmp_hwif->mdma_filter;
 397         hwif->udma_filter               = tmp_hwif->udma_filter;
 398         hwif->selectproc                = tmp_hwif->selectproc;
 399         hwif->reset_poll                = tmp_hwif->reset_poll;
 400         hwif->pre_reset                 = tmp_hwif->pre_reset;
 401         hwif->resetproc                 = tmp_hwif->resetproc;
 402         hwif->intrproc                  = tmp_hwif->intrproc;
 403         hwif->maskproc                  = tmp_hwif->maskproc;
 404         hwif->quirkproc                 = tmp_hwif->quirkproc;
 405         hwif->busproc                   = tmp_hwif->busproc;
 406
 407         hwif->ata_input_data            = tmp_hwif->ata_input_data;
 408         hwif->ata_output_data           = tmp_hwif->ata_output_data;
 409         hwif->atapi_input_bytes         = tmp_hwif->atapi_input_bytes;
 410         hwif->atapi_output_bytes        = tmp_hwif->atapi_output_bytes;
 411
 412         hwif->dma_setup                 = tmp_hwif->dma_setup;
 413         hwif->dma_exec_cmd              = tmp_hwif->dma_exec_cmd;
 414         hwif->dma_start                 = tmp_hwif->dma_start;
 415         hwif->ide_dma_end               = tmp_hwif->ide_dma_end;
 416         hwif->ide_dma_on                = tmp_hwif->ide_dma_on;
 417         hwif->dma_off_quietly           = tmp_hwif->dma_off_quietly;
 418         hwif->ide_dma_test_irq          = tmp_hwif->ide_dma_test_irq;
 419         hwif->ide_dma_clear_irq         = tmp_hwif->ide_dma_clear_irq;
 420         hwif->dma_host_on               = tmp_hwif->dma_host_on;
 421         hwif->dma_host_off              = tmp_hwif->dma_host_off;
 422         hwif->dma_lost_irq              = tmp_hwif->dma_lost_irq;
 423         hwif->dma_timeout               = tmp_hwif->dma_timeout;
 424
 425         hwif->OUTB                      = tmp_hwif->OUTB;
 426         hwif->OUTBSYNC                  = tmp_hwif->OUTBSYNC;
 427         hwif->OUTW                      = tmp_hwif->OUTW;
 428         hwif->OUTSW                     = tmp_hwif->OUTSW;
 429         hwif->OUTSL                     = tmp_hwif->OUTSL;
 430
 431         hwif->INB                       = tmp_hwif->INB;
 432         hwif->INW                       = tmp_hwif->INW;
 433         hwif->INSW                      = tmp_hwif->INSW;
 434         hwif->INSL                      = tmp_hwif->INSL;
 435
 436         hwif->sg_max_nents              = tmp_hwif->sg_max_nents;
 437
 438         hwif->mmio                      = tmp_hwif->mmio;
 439         hwif->rqsize                    = tmp_hwif->rqsize;
 440         hwif->no_lba48                  = tmp_hwif->no_lba48;
 441
 442 #ifndef CONFIG_BLK_DEV_IDECS
 443         hwif->irq                       = tmp_hwif->irq;
 444 #endif
 445
 446         hwif->dma_base                  = tmp_hwif->dma_base;
 447         hwif->dma_master                = tmp_hwif->dma_master;
 448         hwif->dma_command               = tmp_hwif->dma_command;
 449         hwif->dma_vendor1               = tmp_hwif->dma_vendor1;
 450         hwif->dma_status                = tmp_hwif->dma_status;
 451         hwif->dma_vendor3               = tmp_hwif->dma_vendor3;
 452         hwif->dma_prdtable              = tmp_hwif->dma_prdtable;
 453
 454         hwif->config_data               = tmp_hwif->config_data;
 455         hwif->select_data               = tmp_hwif->select_data;
 456         hwif->extra_base                = tmp_hwif->extra_base;
 457         hwif->extra_ports               = tmp_hwif->extra_ports;
 458
 459         hwif->hwif_data                 = tmp_hwif->hwif_data;
 460 }
 461
 462 /**
 463  *      ide_unregister          -       free an IDE interface
 464  *      @index: index of interface (will change soon to a pointer)
 465  *
 466  *      Perform the final unregister of an IDE interface. At the moment
 467  *      we don't refcount interfaces so this will also get split up.
 468  *
 469  *      Locking:
 470  *      The caller must not hold the IDE locks
 471  *      The drive present/vanishing is not yet properly locked
 472  *      Take care with the callbacks. These have been split to avoid
 473  *      deadlocking the IDE layer. The shutdown callback is called
 474  *      before we take the lock and free resources. It is up to the
 475  *      caller to be sure there is no pending I/O here, and that
 476  *      the interface will not be reopened (present/vanishing locking
 477  *      isn't yet done BTW). After we commit to the final kill we
 478  *      call the cleanup callback with the ide locks held.
 479  *
 480  *      Unregister restores the hwif structures to the default state.
 481  *      This is raving bonkers.
 482  */
 483
 484 void ide_unregister(unsigned int index)
 485 {
 486         ide_drive_t *drive;
 487         ide_hwif_t *hwif, *g;
 488         static ide_hwif_t tmp_hwif; /* protected by ide_cfg_mtx */
 489         ide_hwgroup_t *hwgroup;
 490         int irq_count = 0, unit;
 491
 492         BUG_ON(index >= MAX_HWIFS);
 493
 494         BUG_ON(in_interrupt());
 495         BUG_ON(irqs_disabled());
 496         mutex_lock(&ide_cfg_mtx);
 497         spin_lock_irq(&ide_lock);
 498         hwif = &ide_hwifs[index];
 499         if (!hwif->present)
 500                 goto abort;
 501         for (unit = 0; unit < MAX_DRIVES; ++unit) {
 502                 drive = &hwif->drives[unit];
 503                 if (!drive->present)
 504                         continue;
 505                 spin_unlock_irq(&ide_lock);
 506                 device_unregister(&drive->gendev);
 507                 wait_for_completion(&drive->gendev_rel_comp);
 508                 spin_lock_irq(&ide_lock);
 509         }
 510         hwif->present = 0;
 511
 512         spin_unlock_irq(&ide_lock);
 513
 514         ide_proc_unregister_port(hwif);
 515
 516         hwgroup = hwif->hwgroup;
 517         /*
 518          * free the irq if we were the only hwif using it
 519          */
 520         g = hwgroup->hwif;
 521         do {
 522                 if (g->irq == hwif->irq)
 523                         ++irq_count;
 524                 g = g->next;
 525         } while (g != hwgroup->hwif);
 526         if (irq_count == 1)
 527                 free_irq(hwif->irq, hwgroup);
 528
 529         spin_lock_irq(&ide_lock);
 530         /*
 531          * Note that we only release the standard ports,
 532          * and do not even try to handle any extra ports
 533          * allocated for weird IDE interface chipsets.
 534          */
 535         ide_hwif_release_regions(hwif);
 536
 537         /*
 538          * Remove us from the hwgroup, and free
 539          * the hwgroup if we were the only member
 540          */
 541         if (hwif->next == hwif) {
 542                 BUG_ON(hwgroup->hwif != hwif);
 543                 kfree(hwgroup);
 544         } else {
 545                 /* There is another interface in hwgroup.
 546                  * Unlink us, and set hwgroup->drive and ->hwif to
 547                  * something sane.
 548                  */
 549                 g = hwgroup->hwif;
 550                 while (g->next != hwif)
 551                         g = g->next;
 552                 g->next = hwif->next;
 553                 if (hwgroup->hwif == hwif) {
 554                         /* Chose a random hwif for hwgroup->hwif.
 555                          * It's guaranteed that there are no drives
 556                          * left in the hwgroup.
 557                          */
 558                         BUG_ON(hwgroup->drive != NULL);
 559                         hwgroup->hwif = g;
 560                 }
 561                 BUG_ON(hwgroup->hwif == hwif);
 562         }
 563
 564         /* More messed up locking ... */
 565         spin_unlock_irq(&ide_lock);
 566         device_unregister(&hwif->gendev);
 567         wait_for_completion(&hwif->gendev_rel_comp);
 568
 569         /*
 570          * Remove us from the kernel's knowledge
 571          */
 572         blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
 573         kfree(hwif->sg_table);
 574         unregister_blkdev(hwif->major, hwif->name);
 575         spin_lock_irq(&ide_lock);
 576
 577         if (hwif->dma_base) {
 578                 (void) ide_release_dma(hwif);
 579
 580                 hwif->dma_base = 0;
 581                 hwif->dma_master = 0;
 582                 hwif->dma_command = 0;
 583                 hwif->dma_vendor1 = 0;
 584                 hwif->dma_status = 0;
 585                 hwif->dma_vendor3 = 0;
 586                 hwif->dma_prdtable = 0;
 587
 588                 hwif->extra_base  = 0;
 589                 hwif->extra_ports = 0;
 590         }
 591
 592         /* copy original settings */
 593         tmp_hwif = *hwif;
 594
 595         /* restore hwif data to pristine status */
 596         init_hwif_data(hwif, index);
 597         init_hwif_default(hwif, index);
 598
 599         ide_hwif_restore(hwif, &tmp_hwif);
 600
 601 abort:
 602         spin_unlock_irq(&ide_lock);
 603         mutex_unlock(&ide_cfg_mtx);
 604 }
 605
 606 EXPORT_SYMBOL(ide_unregister);
 607
 608
 609 /**
 610  *      ide_setup_ports         -       set up IDE interface ports
 611  *      @hw: register descriptions
 612  *      @base: base register
 613  *      @offsets: table of register offsets
 614  *      @ctrl: control register
 615  *      @ack_irq: IRQ ack
 616  *      @irq: interrupt lie
 617  *
 618  *      Setup hw_regs_t structure described by parameters.  You
 619  *      may set up the hw structure yourself OR use this routine to
 620  *      do it for you. This is basically a helper
 621  *
 622  */
 623
 624 void ide_setup_ports (  hw_regs_t *hw,
 625                         unsigned long base, int *offsets,
 626                         unsigned long ctrl, unsigned long intr,
 627                         ide_ack_intr_t *ack_intr,
 628 /*
 629  *                      ide_io_ops_t *iops,
 630  */
 631                         int irq)
 632 {
 633         int i;
 634
 635         memset(hw, 0, sizeof(hw_regs_t));
 636         for (i = 0; i < IDE_NR_PORTS; i++) {
 637                 if (offsets[i] == -1) {
 638                         switch(i) {
 639                                 case IDE_CONTROL_OFFSET:
 640                                         hw->io_ports[i] = ctrl;
 641                                         break;
 642 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
 643                                 case IDE_IRQ_OFFSET:
 644                                         hw->io_ports[i] = intr;
 645                                         break;
 646 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
 647                                 default:
 648                                         hw->io_ports[i] = 0;
 649                                         break;
 650                         }
 651                 } else {
 652                         hw->io_ports[i] = base + offsets[i];
 653                 }
 654         }
 655         hw->irq = irq;
 656         hw->dma = NO_DMA;
 657         hw->ack_intr = ack_intr;
 658 /*
 659  *      hw->iops = iops;
 660  */
 661 }
 662
 663 /**
 664  *      ide_register_hw_with_fixup      -       register IDE interface
 665  *      @hw: hardware registers
 666  *      @initializing: set while initializing built-in drivers
 667  *      @hwifp: pointer to returned hwif
 668  *      @fixup: fixup function
 669  *
 670  *      Register an IDE interface, specifying exactly the registers etc.
 671  *      Set init=1 iff calling before probes have taken place.
 672  *
 673  *      Returns -1 on error.
 674  */
 675
 676 int ide_register_hw_with_fixup(hw_regs_t *hw, int initializing,
 677                                ide_hwif_t **hwifp,
 678                                void(*fixup)(ide_hwif_t *hwif))
 679 {
 680         int index, retry = 1;
 681         ide_hwif_t *hwif;
 682
 683         do {
 684                 for (index = 0; index < MAX_HWIFS; ++index) {
 685                         hwif = &ide_hwifs[index];
 686                         if (hwif->hw.io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
 687                                 goto found;
 688                 }
 689                 for (index = 0; index < MAX_HWIFS; ++index) {
 690                         hwif = &ide_hwifs[index];
 691                         if (hwif->hold)
 692                                 continue;
 693                         if ((!hwif->present && !hwif->mate && !initializing) ||
 694                             (!hwif->hw.io_ports[IDE_DATA_OFFSET] && initializing))
 695                                 goto found;
 696                 }
 697                 for (index = 0; index < MAX_HWIFS; index++)
 698                         ide_unregister(index);
 699         } while (retry--);
 700         return -1;
 701 found:
 702         if (hwif->present)
 703                 ide_unregister(index);
 704         else if (!hwif->hold) {
 705                 init_hwif_data(hwif, index);
 706                 init_hwif_default(hwif, index);
 707         }
 708         if (hwif->present)
 709                 return -1;
 710         memcpy(&hwif->hw, hw, sizeof(*hw));
 711         memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports));
 712         hwif->irq = hw->irq;
 713         hwif->noprobe = 0;
 714         hwif->chipset = hw->chipset;
 715         hwif->gendev.parent = hw->dev;
 716
 717         if (!initializing) {
 718                 probe_hwif_init_with_fixup(hwif, fixup);
 719                 ide_proc_register_port(hwif);
 720         }
 721
 722         if (hwifp)
 723                 *hwifp = hwif;
 724
 725         return (initializing || hwif->present) ? index : -1;
 726 }
 727
 728 EXPORT_SYMBOL(ide_register_hw_with_fixup);
 729
 730 int ide_register_hw(hw_regs_t *hw, int initializing, ide_hwif_t **hwifp)
 731 {
 732         return ide_register_hw_with_fixup(hw, initializing, hwifp, NULL);
 733 }
 734
 735 EXPORT_SYMBOL(ide_register_hw);
 736
 737 /*
 738  *      Locks for IDE setting functionality
 739  */
 740
 741 DEFINE_MUTEX(ide_setting_mtx);
 742
 743 EXPORT_SYMBOL_GPL(ide_setting_mtx);
 744
 745 /**
 746  *      ide_spin_wait_hwgroup   -       wait for group
 747  *      @drive: drive in the group
 748  *
 749  *      Wait for an IDE device group to go non busy and then return
 750  *      holding the ide_lock which guards the hwgroup->busy status
 751  *      and right to use it.
 752  */
 753
 754 int ide_spin_wait_hwgroup (ide_drive_t *drive)
 755 {
 756         ide_hwgroup_t *hwgroup = HWGROUP(drive);
 757         unsigned long timeout = jiffies + (3 * HZ);
 758
 759         spin_lock_irq(&ide_lock);
 760
 761         while (hwgroup->busy) {
 762                 unsigned long lflags;
 763                 spin_unlock_irq(&ide_lock);
 764                 local_irq_set(lflags);
 765                 if (time_after(jiffies, timeout)) {
 766                         local_irq_restore(lflags);
 767                         printk(KERN_ERR "%s: channel busy\n", drive->name);
 768                         return -EBUSY;
 769                 }
 770                 local_irq_restore(lflags);
 771                 spin_lock_irq(&ide_lock);
 772         }
 773         return 0;
 774 }
 775
 776 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
 777
 778 int set_io_32bit(ide_drive_t *drive, int arg)
 779 {
 780         if (drive->no_io_32bit)
 781                 return -EPERM;
 782
 783         if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
 784                 return -EINVAL;
 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         return 0;
 792 }
 793
 794 static int set_ksettings(ide_drive_t *drive, int arg)
 795 {
 796         if (arg < 0 || arg > 1)
 797                 return -EINVAL;
 798
 799         if (ide_spin_wait_hwgroup(drive))
 800                 return -EBUSY;
 801         drive->keep_settings = arg;
 802         spin_unlock_irq(&ide_lock);
 803
 804         return 0;
 805 }
 806
 807 int set_using_dma(ide_drive_t *drive, int arg)
 808 {
 809 #ifdef CONFIG_BLK_DEV_IDEDMA
 810         ide_hwif_t *hwif = drive->hwif;
 811         int err = -EPERM;
 812
 813         if (arg < 0 || arg > 1)
 814                 return -EINVAL;
 815
 816         if (!drive->id || !(drive->id->capability & 1))
 817                 goto out;
 818
 819         if (hwif->ide_dma_on == NULL)
 820                 goto out;
 821
 822         err = -EBUSY;
 823         if (ide_spin_wait_hwgroup(drive))
 824                 goto out;
 825         /*
 826          * set ->busy flag, unlock and let it ride
 827          */
 828         hwif->hwgroup->busy = 1;
 829         spin_unlock_irq(&ide_lock);
 830
 831         err = 0;
 832
 833         if (arg) {
 834                 hwif->dma_off_quietly(drive);
 835                 if (ide_set_dma(drive) || hwif->ide_dma_on(drive))
 836                         err = -EIO;
 837         } else
 838                 ide_dma_off(drive);
 839
 840         /*
 841          * lock, clear ->busy flag and unlock before leaving
 842          */
 843         spin_lock_irq(&ide_lock);
 844         hwif->hwgroup->busy = 0;
 845         spin_unlock_irq(&ide_lock);
 846 out:
 847         return err;
 848 #else
 849         if (arg < 0 || arg > 1)
 850                 return -EINVAL;
 851
 852         return -EPERM;
 853 #endif
 854 }
 855
 856 int set_pio_mode(ide_drive_t *drive, int arg)
 857 {
 858         struct request rq;
 859
 860         if (arg < 0 || arg > 255)
 861                 return -EINVAL;
 862
 863         if (drive->hwif->set_pio_mode == NULL)
 864                 return -ENOSYS;
 865
 866         if (drive->special.b.set_tune)
 867                 return -EBUSY;
 868         ide_init_drive_cmd(&rq);
 869         drive->tune_req = (u8) arg;
 870         drive->special.b.set_tune = 1;
 871         (void) ide_do_drive_cmd(drive, &rq, ide_wait);
 872         return 0;
 873 }
 874
 875 static int set_unmaskirq(ide_drive_t *drive, int arg)
 876 {
 877         if (drive->no_unmask)
 878                 return -EPERM;
 879
 880         if (arg < 0 || arg > 1)
 881                 return -EINVAL;
 882
 883         if (ide_spin_wait_hwgroup(drive))
 884                 return -EBUSY;
 885         drive->unmask = arg;
 886         spin_unlock_irq(&ide_lock);
 887
 888         return 0;
 889 }
 890
 891 /**
 892  *      system_bus_clock        -       clock guess
 893  *
 894  *      External version of the bus clock guess used by very old IDE drivers
 895  *      for things like VLB timings. Should not be used.
 896  */
 897
 898 int system_bus_clock (void)
 899 {
 900         return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
 901 }
 902
 903 EXPORT_SYMBOL(system_bus_clock);
 904
 905 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
 906 {
 907         ide_drive_t *drive = dev->driver_data;
 908         ide_hwif_t *hwif = HWIF(drive);
 909         struct request rq;
 910         struct request_pm_state rqpm;
 911         ide_task_t args;
 912         int ret;
 913
 914         /* Call ACPI _GTM only once */
 915         if (!(drive->dn % 2))
 916                 ide_acpi_get_timing(hwif);
 917
 918         memset(&rq, 0, sizeof(rq));
 919         memset(&rqpm, 0, sizeof(rqpm));
 920         memset(&args, 0, sizeof(args));
 921         rq.cmd_type = REQ_TYPE_PM_SUSPEND;
 922         rq.special = &args;
 923         rq.data = &rqpm;
 924         rqpm.pm_step = ide_pm_state_start_suspend;
 925         if (mesg.event == PM_EVENT_PRETHAW)
 926                 mesg.event = PM_EVENT_FREEZE;
 927         rqpm.pm_state = mesg.event;
 928
 929         ret = ide_do_drive_cmd(drive, &rq, ide_wait);
 930         /* only call ACPI _PS3 after both drivers are suspended */
 931         if (!ret && (((drive->dn % 2) && hwif->drives[0].present
 932                  && hwif->drives[1].present)
 933                  || !hwif->drives[0].present
 934                  || !hwif->drives[1].present))
 935                 ide_acpi_set_state(hwif, 0);
 936         return ret;
 937 }
 938
 939 static int generic_ide_resume(struct device *dev)
 940 {
 941         ide_drive_t *drive = dev->driver_data;
 942         ide_hwif_t *hwif = HWIF(drive);
 943         struct request rq;
 944         struct request_pm_state rqpm;
 945         ide_task_t args;
 946         int err;
 947
 948         /* Call ACPI _STM only once */
 949         if (!(drive->dn % 2)) {
 950                 ide_acpi_set_state(hwif, 1);
 951                 ide_acpi_push_timing(hwif);
 952         }
 953
 954         ide_acpi_exec_tfs(drive);
 955
 956         memset(&rq, 0, sizeof(rq));
 957         memset(&rqpm, 0, sizeof(rqpm));
 958         memset(&args, 0, sizeof(args));
 959         rq.cmd_type = REQ_TYPE_PM_RESUME;
 960         rq.special = &args;
 961         rq.data = &rqpm;
 962         rqpm.pm_step = ide_pm_state_start_resume;
 963         rqpm.pm_state = PM_EVENT_ON;
 964
 965         err = ide_do_drive_cmd(drive, &rq, ide_head_wait);
 966
 967         if (err == 0 && dev->driver) {
 968                 ide_driver_t *drv = to_ide_driver(dev->driver);
 969
 970                 if (drv->resume)
 971                         drv->resume(drive);
 972         }
 973
 974         return err;
 975 }
 976
 977 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
 978                         unsigned int cmd, unsigned long arg)
 979 {
 980         unsigned long flags;
 981         ide_driver_t *drv;
 982         void __user *p = (void __user *)arg;
 983         int err = 0, (*setfunc)(ide_drive_t *, int);
 984         u8 *val;
 985
 986         switch (cmd) {
 987         case HDIO_GET_32BIT:        val = &drive->io_32bit;      goto read_val;
 988         case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
 989         case HDIO_GET_UNMASKINTR:   val = &drive->unmask;        goto read_val;
 990         case HDIO_GET_DMA:          val = &drive->using_dma;     goto read_val;
 991         case HDIO_SET_32BIT:        setfunc = set_io_32bit;      goto set_val;
 992         case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings;     goto set_val;
 993         case HDIO_SET_PIO_MODE:     setfunc = set_pio_mode;      goto set_val;
 994         case HDIO_SET_UNMASKINTR:   setfunc = set_unmaskirq;     goto set_val;
 995         case HDIO_SET_DMA:          setfunc = set_using_dma;     goto set_val;
 996         }
 997
 998         switch (cmd) {
 999                 case HDIO_OBSOLETE_IDENTITY:
1000                 case HDIO_GET_IDENTITY:
1001                         if (bdev != bdev->bd_contains)
1002                                 return -EINVAL;
1003                         if (drive->id_read == 0)
1004                                 return -ENOMSG;
1005                         if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1006                                 return -EFAULT;
1007                         return 0;
1008
1009                 case HDIO_GET_NICE:
1010                         return put_user(drive->dsc_overlap      <<      IDE_NICE_DSC_OVERLAP    |
1011                                         drive->atapi_overlap    <<      IDE_NICE_ATAPI_OVERLAP  |
1012                                         drive->nice0            <<      IDE_NICE_0              |
1013                                         drive->nice1            <<      IDE_NICE_1              |
1014                                         drive->nice2            <<      IDE_NICE_2,
1015                                         (long __user *) arg);
1016
1017 #ifdef CONFIG_IDE_TASK_IOCTL
1018                 case HDIO_DRIVE_TASKFILE:
1019                         if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1020                                 return -EACCES;
1021                         switch(drive->media) {
1022                                 case ide_disk:
1023                                         return ide_taskfile_ioctl(drive, cmd, arg);
1024                                 default:
1025                                         return -ENOMSG;
1026                         }
1027 #endif /* CONFIG_IDE_TASK_IOCTL */
1028
1029                 case HDIO_DRIVE_CMD:
1030                         if (!capable(CAP_SYS_RAWIO))
1031                                 return -EACCES;
1032                         return ide_cmd_ioctl(drive, cmd, arg);
1033
1034                 case HDIO_DRIVE_TASK:
1035                         if (!capable(CAP_SYS_RAWIO))
1036                                 return -EACCES;
1037                         return ide_task_ioctl(drive, cmd, arg);
1038
1039                 case HDIO_SCAN_HWIF:
1040                 {
1041                         hw_regs_t hw;
1042                         int args[3];
1043                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1044                         if (copy_from_user(args, p, 3 * sizeof(int)))
1045                                 return -EFAULT;
1046                         memset(&hw, 0, sizeof(hw));
1047                         ide_init_hwif_ports(&hw, (unsigned long) args[0],
1048                                             (unsigned long) args[1], NULL);
1049                         hw.irq = args[2];
1050                         if (ide_register_hw(&hw, 0, NULL) == -1)
1051                                 return -EIO;
1052                         return 0;
1053                 }
1054                 case HDIO_UNREGISTER_HWIF:
1055                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1056                         /* (arg > MAX_HWIFS) checked in function */
1057                         ide_unregister(arg);
1058                         return 0;
1059                 case HDIO_SET_NICE:
1060                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1061                         if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1062                                 return -EPERM;
1063                         drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1064                         drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1065                         if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1066                                 drive->dsc_overlap = 0;
1067                                 return -EPERM;
1068                         }
1069                         drive->nice1 = (arg >> IDE_NICE_1) & 1;
1070                         return 0;
1071                 case HDIO_DRIVE_RESET:
1072                 {
1073                         unsigned long flags;
1074                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1075
1076                         /*
1077                          *      Abort the current command on the
1078                          *      group if there is one, taking
1079                          *      care not to allow anything else
1080                          *      to be queued and to die on the
1081                          *      spot if we miss one somehow
1082                          */
1083
1084                         spin_lock_irqsave(&ide_lock, flags);
1085
1086                         if (HWGROUP(drive)->resetting) {
1087                                 spin_unlock_irqrestore(&ide_lock, flags);
1088                                 return -EBUSY;
1089                         }
1090
1091                         ide_abort(drive, "drive reset");
1092
1093                         BUG_ON(HWGROUP(drive)->handler);
1094
1095                         /* Ensure nothing gets queued after we
1096                            drop the lock. Reset will clear the busy */
1097
1098                         HWGROUP(drive)->busy = 1;
1099                         spin_unlock_irqrestore(&ide_lock, flags);
1100                         (void) ide_do_reset(drive);
1101
1102                         return 0;
1103                 }
1104
1105                 case HDIO_GET_BUSSTATE:
1106                         if (!capable(CAP_SYS_ADMIN))
1107                                 return -EACCES;
1108                         if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1109                                 return -EFAULT;
1110                         return 0;
1111
1112                 case HDIO_SET_BUSSTATE:
1113                         if (!capable(CAP_SYS_ADMIN))
1114                                 return -EACCES;
1115                         if (HWIF(drive)->busproc)
1116                                 return HWIF(drive)->busproc(drive, (int)arg);
1117                         return -EOPNOTSUPP;
1118                 default:
1119                         return -EINVAL;
1120         }
1121
1122 read_val:
1123         mutex_lock(&ide_setting_mtx);
1124         spin_lock_irqsave(&ide_lock, flags);
1125         err = *val;
1126         spin_unlock_irqrestore(&ide_lock, flags);
1127         mutex_unlock(&ide_setting_mtx);
1128         return err >= 0 ? put_user(err, (long __user *)arg) : err;
1129
1130 set_val:
1131         if (bdev != bdev->bd_contains)
1132                 err = -EINVAL;
1133         else {
1134                 if (!capable(CAP_SYS_ADMIN))
1135                         err = -EACCES;
1136                 else {
1137                         mutex_lock(&ide_setting_mtx);
1138                         err = setfunc(drive, arg);
1139                         mutex_unlock(&ide_setting_mtx);
1140                 }
1141         }
1142         return err;
1143 }
1144
1145 EXPORT_SYMBOL(generic_ide_ioctl);
1146
1147 /*
1148  * stridx() returns the offset of c within s,
1149  * or -1 if c is '\0' or not found within s.
1150  */
1151 static int __init stridx (const char *s, char c)
1152 {
1153         char *i = strchr(s, c);
1154         return (i && c) ? i - s : -1;
1155 }
1156
1157 /*
1158  * match_parm() does parsing for ide_setup():
1159  *
1160  * 1. the first char of s must be '='.
1161  * 2. if the remainder matches one of the supplied keywords,
1162  *     the index (1 based) of the keyword is negated and returned.
1163  * 3. if the remainder is a series of no more than max_vals numbers
1164  *     separated by commas, the numbers are saved in vals[] and a
1165  *     count of how many were saved is returned.  Base10 is assumed,
1166  *     and base16 is allowed when prefixed with "0x".
1167  * 4. otherwise, zero is returned.
1168  */
1169 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1170 {
1171         static const char *decimal = "0123456789";
1172         static const char *hex = "0123456789abcdef";
1173         int i, n;
1174
1175         if (*s++ == '=') {
1176                 /*
1177                  * Try matching against the supplied keywords,
1178                  * and return -(index+1) if we match one
1179                  */
1180                 if (keywords != NULL) {
1181                         for (i = 0; *keywords != NULL; ++i) {
1182                                 if (!strcmp(s, *keywords++))
1183                                         return -(i+1);
1184                         }
1185                 }
1186                 /*
1187                  * Look for a series of no more than "max_vals"
1188                  * numeric values separated by commas, in base10,
1189                  * or base16 when prefixed with "0x".
1190                  * Return a count of how many were found.
1191                  */
1192                 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1193                         vals[n] = i;
1194                         while ((i = stridx(decimal, *++s)) >= 0)
1195                                 vals[n] = (vals[n] * 10) + i;
1196                         if (*s == 'x' && !vals[n]) {
1197                                 while ((i = stridx(hex, *++s)) >= 0)
1198                                         vals[n] = (vals[n] * 0x10) + i;
1199                         }
1200                         if (++n == max_vals)
1201                                 break;
1202                         if (*s == ',' || *s == ';')
1203                                 ++s;
1204                 }
1205                 if (!*s)
1206                         return n;
1207         }
1208         return 0;       /* zero = nothing matched */
1209 }
1210
1211 #ifdef CONFIG_BLK_DEV_ALI14XX
1212 extern int probe_ali14xx;
1213 extern int ali14xx_init(void);
1214 #endif
1215 #ifdef CONFIG_BLK_DEV_UMC8672
1216 extern int probe_umc8672;
1217 extern int umc8672_init(void);
1218 #endif
1219 #ifdef CONFIG_BLK_DEV_DTC2278
1220 extern int probe_dtc2278;
1221 extern int dtc2278_init(void);
1222 #endif
1223 #ifdef CONFIG_BLK_DEV_HT6560B
1224 extern int probe_ht6560b;
1225 extern int ht6560b_init(void);
1226 #endif
1227 #ifdef CONFIG_BLK_DEV_QD65XX
1228 extern int probe_qd65xx;
1229 extern int qd65xx_init(void);
1230 #endif
1231
1232 static int __initdata is_chipset_set[MAX_HWIFS];
1233
1234 /*
1235  * ide_setup() gets called VERY EARLY during initialization,
1236  * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1237  *
1238  * Remember to update Documentation/ide.txt if you change something here.
1239  */
1240 static int __init ide_setup(char *s)
1241 {
1242         int i, vals[3];
1243         ide_hwif_t *hwif;
1244         ide_drive_t *drive;
1245         unsigned int hw, unit;
1246         const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1247         const char max_hwif  = '0' + (MAX_HWIFS - 1);
1248
1249
1250         if (strncmp(s,"hd",2) == 0 && s[2] == '=')      /* hd= is for hd.c   */
1251                 return 0;                               /* driver and not us */
1252
1253         if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1254                 return 0;
1255
1256         printk(KERN_INFO "ide_setup: %s", s);
1257         init_ide_data ();
1258
1259 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1260         if (!strcmp(s, "ide=doubler")) {
1261                 extern int ide_doubler;
1262
1263                 printk(" : Enabled support for IDE doublers\n");
1264                 ide_doubler = 1;
1265                 return 1;
1266         }
1267 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1268
1269         if (!strcmp(s, "ide=nodma")) {
1270                 printk(" : Prevented DMA\n");
1271                 noautodma = 1;
1272                 goto obsolete_option;
1273         }
1274
1275 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1276         if (!strcmp(s, "ide=reverse")) {
1277                 ide_scan_direction = 1;
1278                 printk(" : Enabled support for IDE inverse scan order.\n");
1279                 return 1;
1280         }
1281 #endif
1282
1283 #ifdef CONFIG_BLK_DEV_IDEACPI
1284         if (!strcmp(s, "ide=noacpi")) {
1285                 //printk(" : Disable IDE ACPI support.\n");
1286                 ide_noacpi = 1;
1287                 return 1;
1288         }
1289         if (!strcmp(s, "ide=acpigtf")) {
1290                 //printk(" : Enable IDE ACPI _GTF support.\n");
1291                 ide_noacpitfs = 0;
1292                 return 1;
1293         }
1294         if (!strcmp(s, "ide=acpionboot")) {
1295                 //printk(" : Call IDE ACPI methods on boot.\n");
1296                 ide_noacpionboot = 0;
1297                 return 1;
1298         }
1299 #endif /* CONFIG_BLK_DEV_IDEACPI */
1300
1301         /*
1302          * Look for drive options:  "hdx="
1303          */
1304         if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1305                 const char *hd_words[] = {
1306                         "none", "noprobe", "nowerr", "cdrom", "nodma",
1307                         "autotune", "noautotune", "minus8", "swapdata", "bswap",
1308                         "noflush", "remap", "remap63", "scsi", NULL };
1309                 unit = s[2] - 'a';
1310                 hw   = unit / MAX_DRIVES;
1311                 unit = unit % MAX_DRIVES;
1312                 hwif = &ide_hwifs[hw];
1313                 drive = &hwif->drives[unit];
1314                 if (strncmp(s + 4, "ide-", 4) == 0) {
1315                         strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1316                         goto done;
1317                 }
1318                 switch (match_parm(&s[3], hd_words, vals, 3)) {
1319                         case -1: /* "none" */
1320                         case -2: /* "noprobe" */
1321                                 drive->noprobe = 1;
1322                                 goto done;
1323                         case -3: /* "nowerr" */
1324                                 drive->bad_wstat = BAD_R_STAT;
1325                                 hwif->noprobe = 0;
1326                                 goto done;
1327                         case -4: /* "cdrom" */
1328                                 drive->present = 1;
1329                                 drive->media = ide_cdrom;
1330                                 /* an ATAPI device ignores DRDY */
1331                                 drive->ready_stat = 0;
1332                                 hwif->noprobe = 0;
1333                                 goto done;
1334                         case -5: /* nodma */
1335                                 drive->nodma = 1;
1336                                 goto done;
1337                         case -6: /* "autotune" */
1338                                 drive->autotune = IDE_TUNE_AUTO;
1339                                 goto obsolete_option;
1340                         case -7: /* "noautotune" */
1341                                 drive->autotune = IDE_TUNE_NOAUTO;
1342                                 goto obsolete_option;
1343                         case -9: /* "swapdata" */
1344                         case -10: /* "bswap" */
1345                                 drive->bswap = 1;
1346                                 goto done;
1347                         case -11: /* noflush */
1348                                 drive->noflush = 1;
1349                                 goto done;
1350                         case -12: /* "remap" */
1351                                 drive->remap_0_to_1 = 1;
1352                                 goto done;
1353                         case -13: /* "remap63" */
1354                                 drive->sect0 = 63;
1355                                 goto done;
1356                         case -14: /* "scsi" */
1357                                 drive->scsi = 1;
1358                                 goto done;
1359                         case 3: /* cyl,head,sect */
1360                                 drive->media    = ide_disk;
1361                                 drive->ready_stat = READY_STAT;
1362                                 drive->cyl      = drive->bios_cyl  = vals[0];
1363                                 drive->head     = drive->bios_head = vals[1];
1364                                 drive->sect     = drive->bios_sect = vals[2];
1365                                 drive->present  = 1;
1366                                 drive->forced_geom = 1;
1367                                 hwif->noprobe = 0;
1368                                 goto done;
1369                         default:
1370                                 goto bad_option;
1371                 }
1372         }
1373
1374         if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1375                 goto bad_option;
1376         /*
1377          * Look for bus speed option:  "idebus="
1378          */
1379         if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1380                 if (match_parm(&s[6], NULL, vals, 1) != 1)
1381                         goto bad_option;
1382                 if (vals[0] >= 20 && vals[0] <= 66) {
1383                         idebus_parameter = vals[0];
1384                 } else
1385                         printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1386                 goto done;
1387         }
1388         /*
1389          * Look for interface options:  "idex="
1390          */
1391         if (s[3] >= '0' && s[3] <= max_hwif) {
1392                 /*
1393                  * Be VERY CAREFUL changing this: note hardcoded indexes below
1394                  * (-8, -9, -10) are reserved to ease the hardcoding.
1395                  */
1396                 static const char *ide_words[] = {
1397                         "noprobe", "serialize", "minus3", "minus4",
1398                         "reset", "minus6", "ata66", "minus8", "minus9",
1399                         "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1400                         "dtc2278", "umc8672", "ali14xx", NULL };
1401                 hw = s[3] - '0';
1402                 hwif = &ide_hwifs[hw];
1403                 i = match_parm(&s[4], ide_words, vals, 3);
1404
1405                 /*
1406                  * Cryptic check to ensure chipset not already set for hwif.
1407                  * Note: we can't depend on hwif->chipset here.
1408                  */
1409                 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1410                         /* chipset already specified */
1411                         if (is_chipset_set[hw])
1412                                 goto bad_option;
1413                         if (i > -18 && i <= -11) {
1414                                 /* these drivers are for "ide0=" only */
1415                                 if (hw != 0)
1416                                         goto bad_hwif;
1417                                 /* chipset already specified for 2nd port */
1418                                 if (is_chipset_set[hw+1])
1419                                         goto bad_option;
1420                         }
1421                         is_chipset_set[hw] = 1;
1422                         printk("\n");
1423                 }
1424
1425                 switch (i) {
1426 #ifdef CONFIG_BLK_DEV_ALI14XX
1427                         case -17: /* "ali14xx" */
1428                                 probe_ali14xx = 1;
1429                                 goto done;
1430 #endif
1431 #ifdef CONFIG_BLK_DEV_UMC8672
1432                         case -16: /* "umc8672" */
1433                                 probe_umc8672 = 1;
1434                                 goto done;
1435 #endif
1436 #ifdef CONFIG_BLK_DEV_DTC2278
1437                         case -15: /* "dtc2278" */
1438                                 probe_dtc2278 = 1;
1439                                 goto done;
1440 #endif
1441 #ifdef CONFIG_BLK_DEV_CMD640
1442                         case -14: /* "cmd640_vlb" */
1443                         {
1444                                 extern int cmd640_vlb; /* flag for cmd640.c */
1445                                 cmd640_vlb = 1;
1446                                 goto done;
1447                         }
1448 #endif
1449 #ifdef CONFIG_BLK_DEV_HT6560B
1450                         case -13: /* "ht6560b" */
1451                                 probe_ht6560b = 1;
1452                                 goto done;
1453 #endif
1454 #ifdef CONFIG_BLK_DEV_QD65XX
1455                         case -12: /* "qd65xx" */
1456                                 probe_qd65xx = 1;
1457                                 goto done;
1458 #endif
1459 #ifdef CONFIG_BLK_DEV_4DRIVES
1460                         case -11: /* "four" drives on one set of ports */
1461                         {
1462                                 ide_hwif_t *mate = &ide_hwifs[hw^1];
1463                                 mate->drives[0].select.all ^= 0x20;
1464                                 mate->drives[1].select.all ^= 0x20;
1465                                 hwif->chipset = mate->chipset = ide_4drives;
1466                                 mate->irq = hwif->irq;
1467                                 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1468                                 hwif->mate = mate;
1469                                 mate->mate = hwif;
1470                                 hwif->serialized = mate->serialized = 1;
1471                                 goto obsolete_option;
1472                         }
1473 #endif /* CONFIG_BLK_DEV_4DRIVES */
1474                         case -10: /* minus10 */
1475                         case -9: /* minus9 */
1476                         case -8: /* minus8 */
1477                         case -6:
1478                         case -4:
1479                         case -3:
1480                                 goto bad_option;
1481                         case -7: /* ata66 */
1482 #ifdef CONFIG_BLK_DEV_IDEPCI
1483                                 /*
1484                                  * Use ATA_CBL_PATA40_SHORT so drive side
1485                                  * cable detection is also overriden.
1486                                  */
1487                                 hwif->cbl = ATA_CBL_PATA40_SHORT;
1488                                 goto obsolete_option;
1489 #else
1490                                 goto bad_hwif;
1491 #endif
1492                         case -5: /* "reset" */
1493                                 hwif->reset = 1;
1494                                 goto obsolete_option;
1495                         case -2: /* "serialize" */
1496                                 hwif->mate = &ide_hwifs[hw^1];
1497                                 hwif->mate->mate = hwif;
1498                                 hwif->serialized = hwif->mate->serialized = 1;
1499                                 goto obsolete_option;
1500
1501                         case -1: /* "noprobe" */
1502                                 hwif->noprobe = 1;
1503                                 goto done;
1504
1505                         case 1: /* base */
1506                                 vals[1] = vals[0] + 0x206; /* default ctl */
1507                         case 2: /* base,ctl */
1508                                 vals[2] = 0;    /* default irq = probe for it */
1509                         case 3: /* base,ctl,irq */
1510                                 hwif->hw.irq = vals[2];
1511                                 ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq);
1512                                 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
1513                                 hwif->irq      = vals[2];
1514                                 hwif->noprobe  = 0;
1515                                 hwif->chipset  = ide_forced;
1516                                 goto obsolete_option;
1517
1518                         case 0: goto bad_option;
1519                         default:
1520                                 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1521                                 return 1;
1522                 }
1523         }
1524 bad_option:
1525         printk(" -- BAD OPTION\n");
1526         return 1;
1527 obsolete_option:
1528         printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1529         return 1;
1530 bad_hwif:
1531         printk("-- NOT SUPPORTED ON ide%d", hw);
1532 done:
1533         printk("\n");
1534         return 1;
1535 }
1536
1537 extern void __init pnpide_init(void);
1538 extern void __exit pnpide_exit(void);
1539 extern void __init h8300_ide_init(void);
1540
1541 /*
1542  * probe_for_hwifs() finds/initializes "known" IDE interfaces
1543  */
1544 static void __init probe_for_hwifs (void)
1545 {
1546 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1547         ide_scan_pcibus(ide_scan_direction);
1548 #endif
1549
1550 #ifdef CONFIG_ETRAX_IDE
1551         {
1552                 extern void init_e100_ide(void);
1553                 init_e100_ide();
1554         }
1555 #endif /* CONFIG_ETRAX_IDE */
1556 #ifdef CONFIG_BLK_DEV_CMD640
1557         {
1558                 extern void ide_probe_for_cmd640x(void);
1559                 ide_probe_for_cmd640x();
1560         }
1561 #endif /* CONFIG_BLK_DEV_CMD640 */
1562 #ifdef CONFIG_BLK_DEV_IDE_PMAC
1563         {
1564                 extern int pmac_ide_probe(void);
1565                 (void)pmac_ide_probe();
1566         }
1567 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
1568 #ifdef CONFIG_BLK_DEV_GAYLE
1569         {
1570                 extern void gayle_init(void);
1571                 gayle_init();
1572         }
1573 #endif /* CONFIG_BLK_DEV_GAYLE */
1574 #ifdef CONFIG_BLK_DEV_FALCON_IDE
1575         {
1576                 extern void falconide_init(void);
1577                 falconide_init();
1578         }
1579 #endif /* CONFIG_BLK_DEV_FALCON_IDE */
1580 #ifdef CONFIG_BLK_DEV_MAC_IDE
1581         {
1582                 extern void macide_init(void);
1583                 macide_init();
1584         }
1585 #endif /* CONFIG_BLK_DEV_MAC_IDE */
1586 #ifdef CONFIG_BLK_DEV_Q40IDE
1587         {
1588                 extern void q40ide_init(void);
1589                 q40ide_init();
1590         }
1591 #endif /* CONFIG_BLK_DEV_Q40IDE */
1592 #ifdef CONFIG_BLK_DEV_BUDDHA
1593         {
1594                 extern void buddha_init(void);
1595                 buddha_init();
1596         }
1597 #endif /* CONFIG_BLK_DEV_BUDDHA */
1598 #ifdef CONFIG_BLK_DEV_IDEPNP
1599         pnpide_init();
1600 #endif
1601 #ifdef CONFIG_H8300
1602         h8300_ide_init();
1603 #endif
1604 }
1605
1606 /*
1607  * Probe module
1608  */
1609
1610 EXPORT_SYMBOL(ide_lock);
1611
1612 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1613 {
1614         return 1;
1615 }
1616
1617 static char *media_string(ide_drive_t *drive)
1618 {
1619         switch (drive->media) {
1620         case ide_disk:
1621                 return "disk";
1622         case ide_cdrom:
1623                 return "cdrom";
1624         case ide_tape:
1625                 return "tape";
1626         case ide_floppy:
1627                 return "floppy";
1628         case ide_optical:
1629                 return "optical";
1630         default:
1631                 return "UNKNOWN";
1632         }
1633 }
1634
1635 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1636 {
1637         ide_drive_t *drive = to_ide_device(dev);
1638         return sprintf(buf, "%s\n", media_string(drive));
1639 }
1640
1641 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1642 {
1643         ide_drive_t *drive = to_ide_device(dev);
1644         return sprintf(buf, "%s\n", drive->name);
1645 }
1646
1647 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1648 {
1649         ide_drive_t *drive = to_ide_device(dev);
1650         return sprintf(buf, "ide:m-%s\n", media_string(drive));
1651 }
1652
1653 static struct device_attribute ide_dev_attrs[] = {
1654         __ATTR_RO(media),
1655         __ATTR_RO(drivename),
1656         __ATTR_RO(modalias),
1657         __ATTR_NULL
1658 };
1659
1660 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
1661 {
1662         ide_drive_t *drive = to_ide_device(dev);
1663
1664         add_uevent_var(env, "MEDIA=%s", media_string(drive));
1665         add_uevent_var(env, "DRIVENAME=%s", drive->name);
1666         add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
1667         return 0;
1668 }
1669
1670 static int generic_ide_probe(struct device *dev)
1671 {
1672         ide_drive_t *drive = to_ide_device(dev);
1673         ide_driver_t *drv = to_ide_driver(dev->driver);
1674
1675         return drv->probe ? drv->probe(drive) : -ENODEV;
1676 }
1677
1678 static int generic_ide_remove(struct device *dev)
1679 {
1680         ide_drive_t *drive = to_ide_device(dev);
1681         ide_driver_t *drv = to_ide_driver(dev->driver);
1682
1683         if (drv->remove)
1684                 drv->remove(drive);
1685
1686         return 0;
1687 }
1688
1689 static void generic_ide_shutdown(struct device *dev)
1690 {
1691         ide_drive_t *drive = to_ide_device(dev);
1692         ide_driver_t *drv = to_ide_driver(dev->driver);
1693
1694         if (dev->driver && drv->shutdown)
1695                 drv->shutdown(drive);
1696 }
1697
1698 struct bus_type ide_bus_type = {
1699         .name           = "ide",
1700         .match          = ide_bus_match,
1701         .uevent         = ide_uevent,
1702         .probe          = generic_ide_probe,
1703         .remove         = generic_ide_remove,
1704         .shutdown       = generic_ide_shutdown,
1705         .dev_attrs      = ide_dev_attrs,
1706         .suspend        = generic_ide_suspend,
1707         .resume         = generic_ide_resume,
1708 };
1709
1710 EXPORT_SYMBOL_GPL(ide_bus_type);
1711
1712 /*
1713  * This is gets invoked once during initialization, to set *everything* up
1714  */
1715 static int __init ide_init(void)
1716 {
1717         int ret;
1718
1719         printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
1720         system_bus_speed = ide_system_bus_speed();
1721
1722         ret = bus_register(&ide_bus_type);
1723         if (ret < 0) {
1724                 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1725                 return ret;
1726         }
1727
1728         init_ide_data();
1729
1730         proc_ide_create();
1731
1732 #ifdef CONFIG_BLK_DEV_ALI14XX
1733         if (probe_ali14xx)
1734                 (void)ali14xx_init();
1735 #endif
1736 #ifdef CONFIG_BLK_DEV_UMC8672
1737         if (probe_umc8672)
1738                 (void)umc8672_init();
1739 #endif
1740 #ifdef CONFIG_BLK_DEV_DTC2278
1741         if (probe_dtc2278)
1742                 (void)dtc2278_init();
1743 #endif
1744 #ifdef CONFIG_BLK_DEV_HT6560B
1745         if (probe_ht6560b)
1746                 (void)ht6560b_init();
1747 #endif
1748 #ifdef CONFIG_BLK_DEV_QD65XX
1749         if (probe_qd65xx)
1750                 (void)qd65xx_init();
1751 #endif
1752
1753         /* Probe for special PCI and other "known" interface chipsets. */
1754         probe_for_hwifs();
1755
1756         return 0;
1757 }
1758
1759 #ifdef MODULE
1760 static char *options = NULL;
1761 module_param(options, charp, 0);
1762 MODULE_LICENSE("GPL");
1763
1764 static void __init parse_options (char *line)
1765 {
1766         char *next = line;
1767
1768         if (line == NULL || !*line)
1769                 return;
1770         while ((line = next) != NULL) {
1771                 if ((next = strchr(line,' ')) != NULL)
1772                         *next++ = 0;
1773                 if (!ide_setup(line))
1774                         printk (KERN_INFO "Unknown option '%s'\n", line);
1775         }
1776 }
1777
1778 int __init init_module (void)
1779 {
1780         parse_options(options);
1781         return ide_init();
1782 }
1783
1784 void __exit cleanup_module (void)
1785 {
1786         int index;
1787
1788         for (index = 0; index < MAX_HWIFS; ++index)
1789                 ide_unregister(index);
1790
1791 #ifdef CONFIG_BLK_DEV_IDEPNP
1792         pnpide_exit();
1793 #endif
1794
1795         proc_ide_destroy();
1796
1797         bus_unregister(&ide_bus_type);
1798 }
1799
1800 #else /* !MODULE */
1801
1802 __setup("", ide_setup);
1803
1804 module_init(ide_init);
1805
1806 #endif /* MODULE */