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
 441 #ifndef CONFIG_BLK_DEV_IDECS
 442         hwif->irq                       = tmp_hwif->irq;
 443 #endif
 444
 445         hwif->dma_base                  = tmp_hwif->dma_base;
 446         hwif->dma_master                = tmp_hwif->dma_master;
 447         hwif->dma_command               = tmp_hwif->dma_command;
 448         hwif->dma_vendor1               = tmp_hwif->dma_vendor1;
 449         hwif->dma_status                = tmp_hwif->dma_status;
 450         hwif->dma_vendor3               = tmp_hwif->dma_vendor3;
 451         hwif->dma_prdtable              = tmp_hwif->dma_prdtable;
 452
 453         hwif->config_data               = tmp_hwif->config_data;
 454         hwif->select_data               = tmp_hwif->select_data;
 455         hwif->extra_base                = tmp_hwif->extra_base;
 456         hwif->extra_ports               = tmp_hwif->extra_ports;
 457
 458         hwif->hwif_data                 = tmp_hwif->hwif_data;
 459 }
 460
 461 /**
 462  *      ide_unregister          -       free an IDE interface
 463  *      @index: index of interface (will change soon to a pointer)
 464  *
 465  *      Perform the final unregister of an IDE interface. At the moment
 466  *      we don't refcount interfaces so this will also get split up.
 467  *
 468  *      Locking:
 469  *      The caller must not hold the IDE locks
 470  *      The drive present/vanishing is not yet properly locked
 471  *      Take care with the callbacks. These have been split to avoid
 472  *      deadlocking the IDE layer. The shutdown callback is called
 473  *      before we take the lock and free resources. It is up to the
 474  *      caller to be sure there is no pending I/O here, and that
 475  *      the interface will not be reopened (present/vanishing locking
 476  *      isn't yet done BTW). After we commit to the final kill we
 477  *      call the cleanup callback with the ide locks held.
 478  *
 479  *      Unregister restores the hwif structures to the default state.
 480  *      This is raving bonkers.
 481  */
 482
 483 void ide_unregister(unsigned int index)
 484 {
 485         ide_drive_t *drive;
 486         ide_hwif_t *hwif, *g;
 487         static ide_hwif_t tmp_hwif; /* protected by ide_cfg_mtx */
 488         ide_hwgroup_t *hwgroup;
 489         int irq_count = 0, unit;
 490
 491         BUG_ON(index >= MAX_HWIFS);
 492
 493         BUG_ON(in_interrupt());
 494         BUG_ON(irqs_disabled());
 495         mutex_lock(&ide_cfg_mtx);
 496         spin_lock_irq(&ide_lock);
 497         hwif = &ide_hwifs[index];
 498         if (!hwif->present)
 499                 goto abort;
 500         for (unit = 0; unit < MAX_DRIVES; ++unit) {
 501                 drive = &hwif->drives[unit];
 502                 if (!drive->present)
 503                         continue;
 504                 spin_unlock_irq(&ide_lock);
 505                 device_unregister(&drive->gendev);
 506                 wait_for_completion(&drive->gendev_rel_comp);
 507                 spin_lock_irq(&ide_lock);
 508         }
 509         hwif->present = 0;
 510
 511         spin_unlock_irq(&ide_lock);
 512
 513         ide_proc_unregister_port(hwif);
 514
 515         hwgroup = hwif->hwgroup;
 516         /*
 517          * free the irq if we were the only hwif using it
 518          */
 519         g = hwgroup->hwif;
 520         do {
 521                 if (g->irq == hwif->irq)
 522                         ++irq_count;
 523                 g = g->next;
 524         } while (g != hwgroup->hwif);
 525         if (irq_count == 1)
 526                 free_irq(hwif->irq, hwgroup);
 527
 528         spin_lock_irq(&ide_lock);
 529         /*
 530          * Note that we only release the standard ports,
 531          * and do not even try to handle any extra ports
 532          * allocated for weird IDE interface chipsets.
 533          */
 534         ide_hwif_release_regions(hwif);
 535
 536         /*
 537          * Remove us from the hwgroup, and free
 538          * the hwgroup if we were the only member
 539          */
 540         if (hwif->next == hwif) {
 541                 BUG_ON(hwgroup->hwif != hwif);
 542                 kfree(hwgroup);
 543         } else {
 544                 /* There is another interface in hwgroup.
 545                  * Unlink us, and set hwgroup->drive and ->hwif to
 546                  * something sane.
 547                  */
 548                 g = hwgroup->hwif;
 549                 while (g->next != hwif)
 550                         g = g->next;
 551                 g->next = hwif->next;
 552                 if (hwgroup->hwif == hwif) {
 553                         /* Chose a random hwif for hwgroup->hwif.
 554                          * It's guaranteed that there are no drives
 555                          * left in the hwgroup.
 556                          */
 557                         BUG_ON(hwgroup->drive != NULL);
 558                         hwgroup->hwif = g;
 559                 }
 560                 BUG_ON(hwgroup->hwif == hwif);
 561         }
 562
 563         /* More messed up locking ... */
 564         spin_unlock_irq(&ide_lock);
 565         device_unregister(&hwif->gendev);
 566         wait_for_completion(&hwif->gendev_rel_comp);
 567
 568         /*
 569          * Remove us from the kernel's knowledge
 570          */
 571         blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
 572         kfree(hwif->sg_table);
 573         unregister_blkdev(hwif->major, hwif->name);
 574         spin_lock_irq(&ide_lock);
 575
 576         if (hwif->dma_base) {
 577                 (void) ide_release_dma(hwif);
 578
 579                 hwif->dma_base = 0;
 580                 hwif->dma_master = 0;
 581                 hwif->dma_command = 0;
 582                 hwif->dma_vendor1 = 0;
 583                 hwif->dma_status = 0;
 584                 hwif->dma_vendor3 = 0;
 585                 hwif->dma_prdtable = 0;
 586
 587                 hwif->extra_base  = 0;
 588                 hwif->extra_ports = 0;
 589         }
 590
 591         /* copy original settings */
 592         tmp_hwif = *hwif;
 593
 594         /* restore hwif data to pristine status */
 595         init_hwif_data(hwif, index);
 596         init_hwif_default(hwif, index);
 597
 598         ide_hwif_restore(hwif, &tmp_hwif);
 599
 600 abort:
 601         spin_unlock_irq(&ide_lock);
 602         mutex_unlock(&ide_cfg_mtx);
 603 }
 604
 605 EXPORT_SYMBOL(ide_unregister);
 606
 607
 608 /**
 609  *      ide_setup_ports         -       set up IDE interface ports
 610  *      @hw: register descriptions
 611  *      @base: base register
 612  *      @offsets: table of register offsets
 613  *      @ctrl: control register
 614  *      @ack_irq: IRQ ack
 615  *      @irq: interrupt lie
 616  *
 617  *      Setup hw_regs_t structure described by parameters.  You
 618  *      may set up the hw structure yourself OR use this routine to
 619  *      do it for you. This is basically a helper
 620  *
 621  */
 622
 623 void ide_setup_ports (  hw_regs_t *hw,
 624                         unsigned long base, int *offsets,
 625                         unsigned long ctrl, unsigned long intr,
 626                         ide_ack_intr_t *ack_intr,
 627 /*
 628  *                      ide_io_ops_t *iops,
 629  */
 630                         int irq)
 631 {
 632         int i;
 633
 634         memset(hw, 0, sizeof(hw_regs_t));
 635         for (i = 0; i < IDE_NR_PORTS; i++) {
 636                 if (offsets[i] == -1) {
 637                         switch(i) {
 638                                 case IDE_CONTROL_OFFSET:
 639                                         hw->io_ports[i] = ctrl;
 640                                         break;
 641 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
 642                                 case IDE_IRQ_OFFSET:
 643                                         hw->io_ports[i] = intr;
 644                                         break;
 645 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
 646                                 default:
 647                                         hw->io_ports[i] = 0;
 648                                         break;
 649                         }
 650                 } else {
 651                         hw->io_ports[i] = base + offsets[i];
 652                 }
 653         }
 654         hw->irq = irq;
 655         hw->dma = NO_DMA;
 656         hw->ack_intr = ack_intr;
 657 /*
 658  *      hw->iops = iops;
 659  */
 660 }
 661
 662 /**
 663  *      ide_register_hw_with_fixup      -       register IDE interface
 664  *      @hw: hardware registers
 665  *      @initializing: set while initializing built-in drivers
 666  *      @hwifp: pointer to returned hwif
 667  *      @fixup: fixup function
 668  *
 669  *      Register an IDE interface, specifying exactly the registers etc.
 670  *      Set init=1 iff calling before probes have taken place.
 671  *
 672  *      Returns -1 on error.
 673  */
 674
 675 int ide_register_hw_with_fixup(hw_regs_t *hw, int initializing,
 676                                ide_hwif_t **hwifp,
 677                                void(*fixup)(ide_hwif_t *hwif))
 678 {
 679         int index, retry = 1;
 680         ide_hwif_t *hwif;
 681
 682         do {
 683                 for (index = 0; index < MAX_HWIFS; ++index) {
 684                         hwif = &ide_hwifs[index];
 685                         if (hwif->hw.io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
 686                                 goto found;
 687                 }
 688                 for (index = 0; index < MAX_HWIFS; ++index) {
 689                         hwif = &ide_hwifs[index];
 690                         if (hwif->hold)
 691                                 continue;
 692                         if ((!hwif->present && !hwif->mate && !initializing) ||
 693                             (!hwif->hw.io_ports[IDE_DATA_OFFSET] && initializing))
 694                                 goto found;
 695                 }
 696                 for (index = 0; index < MAX_HWIFS; index++)
 697                         ide_unregister(index);
 698         } while (retry--);
 699         return -1;
 700 found:
 701         if (hwif->present)
 702                 ide_unregister(index);
 703         else if (!hwif->hold) {
 704                 init_hwif_data(hwif, index);
 705                 init_hwif_default(hwif, index);
 706         }
 707         if (hwif->present)
 708                 return -1;
 709         memcpy(&hwif->hw, hw, sizeof(*hw));
 710         memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports));
 711         hwif->irq = hw->irq;
 712         hwif->noprobe = 0;
 713         hwif->chipset = hw->chipset;
 714         hwif->gendev.parent = hw->dev;
 715
 716         if (!initializing) {
 717                 probe_hwif_init_with_fixup(hwif, fixup);
 718                 ide_proc_register_port(hwif);
 719         }
 720
 721         if (hwifp)
 722                 *hwifp = hwif;
 723
 724         return (initializing || hwif->present) ? index : -1;
 725 }
 726
 727 EXPORT_SYMBOL(ide_register_hw_with_fixup);
 728
 729 int ide_register_hw(hw_regs_t *hw, int initializing, ide_hwif_t **hwifp)
 730 {
 731         return ide_register_hw_with_fixup(hw, initializing, hwifp, NULL);
 732 }
 733
 734 EXPORT_SYMBOL(ide_register_hw);
 735
 736 /*
 737  *      Locks for IDE setting functionality
 738  */
 739
 740 DEFINE_MUTEX(ide_setting_mtx);
 741
 742 EXPORT_SYMBOL_GPL(ide_setting_mtx);
 743
 744 /**
 745  *      ide_spin_wait_hwgroup   -       wait for group
 746  *      @drive: drive in the group
 747  *
 748  *      Wait for an IDE device group to go non busy and then return
 749  *      holding the ide_lock which guards the hwgroup->busy status
 750  *      and right to use it.
 751  */
 752
 753 int ide_spin_wait_hwgroup (ide_drive_t *drive)
 754 {
 755         ide_hwgroup_t *hwgroup = HWGROUP(drive);
 756         unsigned long timeout = jiffies + (3 * HZ);
 757
 758         spin_lock_irq(&ide_lock);
 759
 760         while (hwgroup->busy) {
 761                 unsigned long lflags;
 762                 spin_unlock_irq(&ide_lock);
 763                 local_irq_set(lflags);
 764                 if (time_after(jiffies, timeout)) {
 765                         local_irq_restore(lflags);
 766                         printk(KERN_ERR "%s: channel busy\n", drive->name);
 767                         return -EBUSY;
 768                 }
 769                 local_irq_restore(lflags);
 770                 spin_lock_irq(&ide_lock);
 771         }
 772         return 0;
 773 }
 774
 775 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
 776
 777 int set_io_32bit(ide_drive_t *drive, int arg)
 778 {
 779         if (drive->no_io_32bit)
 780                 return -EPERM;
 781
 782         if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
 783                 return -EINVAL;
 784
 785         drive->io_32bit = arg;
 786 #ifdef CONFIG_BLK_DEV_DTC2278
 787         if (HWIF(drive)->chipset == ide_dtc2278)
 788                 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
 789 #endif /* CONFIG_BLK_DEV_DTC2278 */
 790         return 0;
 791 }
 792
 793 static int set_ksettings(ide_drive_t *drive, int arg)
 794 {
 795         if (arg < 0 || arg > 1)
 796                 return -EINVAL;
 797
 798         if (ide_spin_wait_hwgroup(drive))
 799                 return -EBUSY;
 800         drive->keep_settings = arg;
 801         spin_unlock_irq(&ide_lock);
 802
 803         return 0;
 804 }
 805
 806 int set_using_dma(ide_drive_t *drive, int arg)
 807 {
 808 #ifdef CONFIG_BLK_DEV_IDEDMA
 809         ide_hwif_t *hwif = drive->hwif;
 810         int err = -EPERM;
 811
 812         if (arg < 0 || arg > 1)
 813                 return -EINVAL;
 814
 815         if (!drive->id || !(drive->id->capability & 1))
 816                 goto out;
 817
 818         if (hwif->ide_dma_on == NULL)
 819                 goto out;
 820
 821         err = -EBUSY;
 822         if (ide_spin_wait_hwgroup(drive))
 823                 goto out;
 824         /*
 825          * set ->busy flag, unlock and let it ride
 826          */
 827         hwif->hwgroup->busy = 1;
 828         spin_unlock_irq(&ide_lock);
 829
 830         err = 0;
 831
 832         if (arg) {
 833                 hwif->dma_off_quietly(drive);
 834                 if (ide_set_dma(drive) || hwif->ide_dma_on(drive))
 835                         err = -EIO;
 836         } else
 837                 ide_dma_off(drive);
 838
 839         /*
 840          * lock, clear ->busy flag and unlock before leaving
 841          */
 842         spin_lock_irq(&ide_lock);
 843         hwif->hwgroup->busy = 0;
 844         spin_unlock_irq(&ide_lock);
 845 out:
 846         return err;
 847 #else
 848         if (arg < 0 || arg > 1)
 849                 return -EINVAL;
 850
 851         return -EPERM;
 852 #endif
 853 }
 854
 855 int set_pio_mode(ide_drive_t *drive, int arg)
 856 {
 857         struct request rq;
 858
 859         if (arg < 0 || arg > 255)
 860                 return -EINVAL;
 861
 862         if (drive->hwif->set_pio_mode == NULL)
 863                 return -ENOSYS;
 864
 865         if (drive->special.b.set_tune)
 866                 return -EBUSY;
 867         ide_init_drive_cmd(&rq);
 868         drive->tune_req = (u8) arg;
 869         drive->special.b.set_tune = 1;
 870         (void) ide_do_drive_cmd(drive, &rq, ide_wait);
 871         return 0;
 872 }
 873
 874 static int set_unmaskirq(ide_drive_t *drive, int arg)
 875 {
 876         if (drive->no_unmask)
 877                 return -EPERM;
 878
 879         if (arg < 0 || arg > 1)
 880                 return -EINVAL;
 881
 882         if (ide_spin_wait_hwgroup(drive))
 883                 return -EBUSY;
 884         drive->unmask = arg;
 885         spin_unlock_irq(&ide_lock);
 886
 887         return 0;
 888 }
 889
 890 /**
 891  *      system_bus_clock        -       clock guess
 892  *
 893  *      External version of the bus clock guess used by very old IDE drivers
 894  *      for things like VLB timings. Should not be used.
 895  */
 896
 897 int system_bus_clock (void)
 898 {
 899         return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
 900 }
 901
 902 EXPORT_SYMBOL(system_bus_clock);
 903
 904 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
 905 {
 906         ide_drive_t *drive = dev->driver_data;
 907         ide_hwif_t *hwif = HWIF(drive);
 908         struct request rq;
 909         struct request_pm_state rqpm;
 910         ide_task_t args;
 911         int ret;
 912
 913         /* Call ACPI _GTM only once */
 914         if (!(drive->dn % 2))
 915                 ide_acpi_get_timing(hwif);
 916
 917         memset(&rq, 0, sizeof(rq));
 918         memset(&rqpm, 0, sizeof(rqpm));
 919         memset(&args, 0, sizeof(args));
 920         rq.cmd_type = REQ_TYPE_PM_SUSPEND;
 921         rq.special = &args;
 922         rq.data = &rqpm;
 923         rqpm.pm_step = ide_pm_state_start_suspend;
 924         if (mesg.event == PM_EVENT_PRETHAW)
 925                 mesg.event = PM_EVENT_FREEZE;
 926         rqpm.pm_state = mesg.event;
 927
 928         ret = ide_do_drive_cmd(drive, &rq, ide_wait);
 929         /* only call ACPI _PS3 after both drivers are suspended */
 930         if (!ret && (((drive->dn % 2) && hwif->drives[0].present
 931                  && hwif->drives[1].present)
 932                  || !hwif->drives[0].present
 933                  || !hwif->drives[1].present))
 934                 ide_acpi_set_state(hwif, 0);
 935         return ret;
 936 }
 937
 938 static int generic_ide_resume(struct device *dev)
 939 {
 940         ide_drive_t *drive = dev->driver_data;
 941         ide_hwif_t *hwif = HWIF(drive);
 942         struct request rq;
 943         struct request_pm_state rqpm;
 944         ide_task_t args;
 945         int err;
 946
 947         /* Call ACPI _STM only once */
 948         if (!(drive->dn % 2)) {
 949                 ide_acpi_set_state(hwif, 1);
 950                 ide_acpi_push_timing(hwif);
 951         }
 952
 953         ide_acpi_exec_tfs(drive);
 954
 955         memset(&rq, 0, sizeof(rq));
 956         memset(&rqpm, 0, sizeof(rqpm));
 957         memset(&args, 0, sizeof(args));
 958         rq.cmd_type = REQ_TYPE_PM_RESUME;
 959         rq.special = &args;
 960         rq.data = &rqpm;
 961         rqpm.pm_step = ide_pm_state_start_resume;
 962         rqpm.pm_state = PM_EVENT_ON;
 963
 964         err = ide_do_drive_cmd(drive, &rq, ide_head_wait);
 965
 966         if (err == 0 && dev->driver) {
 967                 ide_driver_t *drv = to_ide_driver(dev->driver);
 968
 969                 if (drv->resume)
 970                         drv->resume(drive);
 971         }
 972
 973         return err;
 974 }
 975
 976 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
 977                         unsigned int cmd, unsigned long arg)
 978 {
 979         unsigned long flags;
 980         ide_driver_t *drv;
 981         void __user *p = (void __user *)arg;
 982         int err = 0, (*setfunc)(ide_drive_t *, int);
 983         u8 *val;
 984
 985         switch (cmd) {
 986         case HDIO_GET_32BIT:        val = &drive->io_32bit;      goto read_val;
 987         case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
 988         case HDIO_GET_UNMASKINTR:   val = &drive->unmask;        goto read_val;
 989         case HDIO_GET_DMA:          val = &drive->using_dma;     goto read_val;
 990         case HDIO_SET_32BIT:        setfunc = set_io_32bit;      goto set_val;
 991         case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings;     goto set_val;
 992         case HDIO_SET_PIO_MODE:     setfunc = set_pio_mode;      goto set_val;
 993         case HDIO_SET_UNMASKINTR:   setfunc = set_unmaskirq;     goto set_val;
 994         case HDIO_SET_DMA:          setfunc = set_using_dma;     goto set_val;
 995         }
 996
 997         switch (cmd) {
 998                 case HDIO_OBSOLETE_IDENTITY:
 999                 case HDIO_GET_IDENTITY:
1000                         if (bdev != bdev->bd_contains)
1001                                 return -EINVAL;
1002                         if (drive->id_read == 0)
1003                                 return -ENOMSG;
1004                         if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1005                                 return -EFAULT;
1006                         return 0;
1007
1008                 case HDIO_GET_NICE:
1009                         return put_user(drive->dsc_overlap      <<      IDE_NICE_DSC_OVERLAP    |
1010                                         drive->atapi_overlap    <<      IDE_NICE_ATAPI_OVERLAP  |
1011                                         drive->nice0            <<      IDE_NICE_0              |
1012                                         drive->nice1            <<      IDE_NICE_1              |
1013                                         drive->nice2            <<      IDE_NICE_2,
1014                                         (long __user *) arg);
1015
1016 #ifdef CONFIG_IDE_TASK_IOCTL
1017                 case HDIO_DRIVE_TASKFILE:
1018                         if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1019                                 return -EACCES;
1020                         switch(drive->media) {
1021                                 case ide_disk:
1022                                         return ide_taskfile_ioctl(drive, cmd, arg);
1023                                 default:
1024                                         return -ENOMSG;
1025                         }
1026 #endif /* CONFIG_IDE_TASK_IOCTL */
1027
1028                 case HDIO_DRIVE_CMD:
1029                         if (!capable(CAP_SYS_RAWIO))
1030                                 return -EACCES;
1031                         return ide_cmd_ioctl(drive, cmd, arg);
1032
1033                 case HDIO_DRIVE_TASK:
1034                         if (!capable(CAP_SYS_RAWIO))
1035                                 return -EACCES;
1036                         return ide_task_ioctl(drive, cmd, arg);
1037
1038                 case HDIO_SCAN_HWIF:
1039                 {
1040                         hw_regs_t hw;
1041                         int args[3];
1042                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1043                         if (copy_from_user(args, p, 3 * sizeof(int)))
1044                                 return -EFAULT;
1045                         memset(&hw, 0, sizeof(hw));
1046                         ide_init_hwif_ports(&hw, (unsigned long) args[0],
1047                                             (unsigned long) args[1], NULL);
1048                         hw.irq = args[2];
1049                         if (ide_register_hw(&hw, 0, NULL) == -1)
1050                                 return -EIO;
1051                         return 0;
1052                 }
1053                 case HDIO_UNREGISTER_HWIF:
1054                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1055                         /* (arg > MAX_HWIFS) checked in function */
1056                         ide_unregister(arg);
1057                         return 0;
1058                 case HDIO_SET_NICE:
1059                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1060                         if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1061                                 return -EPERM;
1062                         drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1063                         drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1064                         if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1065                                 drive->dsc_overlap = 0;
1066                                 return -EPERM;
1067                         }
1068                         drive->nice1 = (arg >> IDE_NICE_1) & 1;
1069                         return 0;
1070                 case HDIO_DRIVE_RESET:
1071                 {
1072                         unsigned long flags;
1073                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1074
1075                         /*
1076                          *      Abort the current command on the
1077                          *      group if there is one, taking
1078                          *      care not to allow anything else
1079                          *      to be queued and to die on the
1080                          *      spot if we miss one somehow
1081                          */
1082
1083                         spin_lock_irqsave(&ide_lock, flags);
1084
1085                         if (HWGROUP(drive)->resetting) {
1086                                 spin_unlock_irqrestore(&ide_lock, flags);
1087                                 return -EBUSY;
1088                         }
1089
1090                         ide_abort(drive, "drive reset");
1091
1092                         BUG_ON(HWGROUP(drive)->handler);
1093
1094                         /* Ensure nothing gets queued after we
1095                            drop the lock. Reset will clear the busy */
1096
1097                         HWGROUP(drive)->busy = 1;
1098                         spin_unlock_irqrestore(&ide_lock, flags);
1099                         (void) ide_do_reset(drive);
1100
1101                         return 0;
1102                 }
1103
1104                 case HDIO_GET_BUSSTATE:
1105                         if (!capable(CAP_SYS_ADMIN))
1106                                 return -EACCES;
1107                         if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1108                                 return -EFAULT;
1109                         return 0;
1110
1111                 case HDIO_SET_BUSSTATE:
1112                         if (!capable(CAP_SYS_ADMIN))
1113                                 return -EACCES;
1114                         if (HWIF(drive)->busproc)
1115                                 return HWIF(drive)->busproc(drive, (int)arg);
1116                         return -EOPNOTSUPP;
1117                 default:
1118                         return -EINVAL;
1119         }
1120
1121 read_val:
1122         mutex_lock(&ide_setting_mtx);
1123         spin_lock_irqsave(&ide_lock, flags);
1124         err = *val;
1125         spin_unlock_irqrestore(&ide_lock, flags);
1126         mutex_unlock(&ide_setting_mtx);
1127         return err >= 0 ? put_user(err, (long __user *)arg) : err;
1128
1129 set_val:
1130         if (bdev != bdev->bd_contains)
1131                 err = -EINVAL;
1132         else {
1133                 if (!capable(CAP_SYS_ADMIN))
1134                         err = -EACCES;
1135                 else {
1136                         mutex_lock(&ide_setting_mtx);
1137                         err = setfunc(drive, arg);
1138                         mutex_unlock(&ide_setting_mtx);
1139                 }
1140         }
1141         return err;
1142 }
1143
1144 EXPORT_SYMBOL(generic_ide_ioctl);
1145
1146 /*
1147  * stridx() returns the offset of c within s,
1148  * or -1 if c is '\0' or not found within s.
1149  */
1150 static int __init stridx (const char *s, char c)
1151 {
1152         char *i = strchr(s, c);
1153         return (i && c) ? i - s : -1;
1154 }
1155
1156 /*
1157  * match_parm() does parsing for ide_setup():
1158  *
1159  * 1. the first char of s must be '='.
1160  * 2. if the remainder matches one of the supplied keywords,
1161  *     the index (1 based) of the keyword is negated and returned.
1162  * 3. if the remainder is a series of no more than max_vals numbers
1163  *     separated by commas, the numbers are saved in vals[] and a
1164  *     count of how many were saved is returned.  Base10 is assumed,
1165  *     and base16 is allowed when prefixed with "0x".
1166  * 4. otherwise, zero is returned.
1167  */
1168 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1169 {
1170         static const char *decimal = "0123456789";
1171         static const char *hex = "0123456789abcdef";
1172         int i, n;
1173
1174         if (*s++ == '=') {
1175                 /*
1176                  * Try matching against the supplied keywords,
1177                  * and return -(index+1) if we match one
1178                  */
1179                 if (keywords != NULL) {
1180                         for (i = 0; *keywords != NULL; ++i) {
1181                                 if (!strcmp(s, *keywords++))
1182                                         return -(i+1);
1183                         }
1184                 }
1185                 /*
1186                  * Look for a series of no more than "max_vals"
1187                  * numeric values separated by commas, in base10,
1188                  * or base16 when prefixed with "0x".
1189                  * Return a count of how many were found.
1190                  */
1191                 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1192                         vals[n] = i;
1193                         while ((i = stridx(decimal, *++s)) >= 0)
1194                                 vals[n] = (vals[n] * 10) + i;
1195                         if (*s == 'x' && !vals[n]) {
1196                                 while ((i = stridx(hex, *++s)) >= 0)
1197                                         vals[n] = (vals[n] * 0x10) + i;
1198                         }
1199                         if (++n == max_vals)
1200                                 break;
1201                         if (*s == ',' || *s == ';')
1202                                 ++s;
1203                 }
1204                 if (!*s)
1205                         return n;
1206         }
1207         return 0;       /* zero = nothing matched */
1208 }
1209
1210 #ifdef CONFIG_BLK_DEV_ALI14XX
1211 extern int probe_ali14xx;
1212 extern int ali14xx_init(void);
1213 #endif
1214 #ifdef CONFIG_BLK_DEV_UMC8672
1215 extern int probe_umc8672;
1216 extern int umc8672_init(void);
1217 #endif
1218 #ifdef CONFIG_BLK_DEV_DTC2278
1219 extern int probe_dtc2278;
1220 extern int dtc2278_init(void);
1221 #endif
1222 #ifdef CONFIG_BLK_DEV_HT6560B
1223 extern int probe_ht6560b;
1224 extern int ht6560b_init(void);
1225 #endif
1226 #ifdef CONFIG_BLK_DEV_QD65XX
1227 extern int probe_qd65xx;
1228 extern int qd65xx_init(void);
1229 #endif
1230
1231 static int __initdata is_chipset_set[MAX_HWIFS];
1232
1233 /*
1234  * ide_setup() gets called VERY EARLY during initialization,
1235  * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1236  *
1237  * Remember to update Documentation/ide.txt if you change something here.
1238  */
1239 static int __init ide_setup(char *s)
1240 {
1241         int i, vals[3];
1242         ide_hwif_t *hwif;
1243         ide_drive_t *drive;
1244         unsigned int hw, unit;
1245         const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1246         const char max_hwif  = '0' + (MAX_HWIFS - 1);
1247
1248
1249         if (strncmp(s,"hd",2) == 0 && s[2] == '=')      /* hd= is for hd.c   */
1250                 return 0;                               /* driver and not us */
1251
1252         if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1253                 return 0;
1254
1255         printk(KERN_INFO "ide_setup: %s", s);
1256         init_ide_data ();
1257
1258 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1259         if (!strcmp(s, "ide=doubler")) {
1260                 extern int ide_doubler;
1261
1262                 printk(" : Enabled support for IDE doublers\n");
1263                 ide_doubler = 1;
1264                 return 1;
1265         }
1266 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1267
1268         if (!strcmp(s, "ide=nodma")) {
1269                 printk(" : Prevented DMA\n");
1270                 noautodma = 1;
1271                 goto obsolete_option;
1272         }
1273
1274 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1275         if (!strcmp(s, "ide=reverse")) {
1276                 ide_scan_direction = 1;
1277                 printk(" : Enabled support for IDE inverse scan order.\n");
1278                 return 1;
1279         }
1280 #endif
1281
1282 #ifdef CONFIG_BLK_DEV_IDEACPI
1283         if (!strcmp(s, "ide=noacpi")) {
1284                 //printk(" : Disable IDE ACPI support.\n");
1285                 ide_noacpi = 1;
1286                 return 1;
1287         }
1288         if (!strcmp(s, "ide=acpigtf")) {
1289                 //printk(" : Enable IDE ACPI _GTF support.\n");
1290                 ide_noacpitfs = 0;
1291                 return 1;
1292         }
1293         if (!strcmp(s, "ide=acpionboot")) {
1294                 //printk(" : Call IDE ACPI methods on boot.\n");
1295                 ide_noacpionboot = 0;
1296                 return 1;
1297         }
1298 #endif /* CONFIG_BLK_DEV_IDEACPI */
1299
1300         /*
1301          * Look for drive options:  "hdx="
1302          */
1303         if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1304                 const char *hd_words[] = {
1305                         "none", "noprobe", "nowerr", "cdrom", "nodma",
1306                         "autotune", "noautotune", "minus8", "swapdata", "bswap",
1307                         "noflush", "remap", "remap63", "scsi", NULL };
1308                 unit = s[2] - 'a';
1309                 hw   = unit / MAX_DRIVES;
1310                 unit = unit % MAX_DRIVES;
1311                 hwif = &ide_hwifs[hw];
1312                 drive = &hwif->drives[unit];
1313                 if (strncmp(s + 4, "ide-", 4) == 0) {
1314                         strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1315                         goto done;
1316                 }
1317                 switch (match_parm(&s[3], hd_words, vals, 3)) {
1318                         case -1: /* "none" */
1319                         case -2: /* "noprobe" */
1320                                 drive->noprobe = 1;
1321                                 goto done;
1322                         case -3: /* "nowerr" */
1323                                 drive->bad_wstat = BAD_R_STAT;
1324                                 hwif->noprobe = 0;
1325                                 goto done;
1326                         case -4: /* "cdrom" */
1327                                 drive->present = 1;
1328                                 drive->media = ide_cdrom;
1329                                 /* an ATAPI device ignores DRDY */
1330                                 drive->ready_stat = 0;
1331                                 hwif->noprobe = 0;
1332                                 goto done;
1333                         case -5: /* nodma */
1334                                 drive->nodma = 1;
1335                                 goto done;
1336                         case -6: /* "autotune" */
1337                                 drive->autotune = IDE_TUNE_AUTO;
1338                                 goto obsolete_option;
1339                         case -7: /* "noautotune" */
1340                                 drive->autotune = IDE_TUNE_NOAUTO;
1341                                 goto obsolete_option;
1342                         case -9: /* "swapdata" */
1343                         case -10: /* "bswap" */
1344                                 drive->bswap = 1;
1345                                 goto done;
1346                         case -11: /* noflush */
1347                                 drive->noflush = 1;
1348                                 goto done;
1349                         case -12: /* "remap" */
1350                                 drive->remap_0_to_1 = 1;
1351                                 goto done;
1352                         case -13: /* "remap63" */
1353                                 drive->sect0 = 63;
1354                                 goto done;
1355                         case -14: /* "scsi" */
1356                                 drive->scsi = 1;
1357                                 goto done;
1358                         case 3: /* cyl,head,sect */
1359                                 drive->media    = ide_disk;
1360                                 drive->ready_stat = READY_STAT;
1361                                 drive->cyl      = drive->bios_cyl  = vals[0];
1362                                 drive->head     = drive->bios_head = vals[1];
1363                                 drive->sect     = drive->bios_sect = vals[2];
1364                                 drive->present  = 1;
1365                                 drive->forced_geom = 1;
1366                                 hwif->noprobe = 0;
1367                                 goto done;
1368                         default:
1369                                 goto bad_option;
1370                 }
1371         }
1372
1373         if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1374                 goto bad_option;
1375         /*
1376          * Look for bus speed option:  "idebus="
1377          */
1378         if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1379                 if (match_parm(&s[6], NULL, vals, 1) != 1)
1380                         goto bad_option;
1381                 if (vals[0] >= 20 && vals[0] <= 66) {
1382                         idebus_parameter = vals[0];
1383                 } else
1384                         printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1385                 goto done;
1386         }
1387         /*
1388          * Look for interface options:  "idex="
1389          */
1390         if (s[3] >= '0' && s[3] <= max_hwif) {
1391                 /*
1392                  * Be VERY CAREFUL changing this: note hardcoded indexes below
1393                  * (-8, -9, -10) are reserved to ease the hardcoding.
1394                  */
1395                 static const char *ide_words[] = {
1396                         "noprobe", "serialize", "minus3", "minus4",
1397                         "reset", "minus6", "ata66", "minus8", "minus9",
1398                         "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1399                         "dtc2278", "umc8672", "ali14xx", NULL };
1400                 hw = s[3] - '0';
1401                 hwif = &ide_hwifs[hw];
1402                 i = match_parm(&s[4], ide_words, vals, 3);
1403
1404                 /*
1405                  * Cryptic check to ensure chipset not already set for hwif.
1406                  * Note: we can't depend on hwif->chipset here.
1407                  */
1408                 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1409                         /* chipset already specified */
1410                         if (is_chipset_set[hw])
1411                                 goto bad_option;
1412                         if (i > -18 && i <= -11) {
1413                                 /* these drivers are for "ide0=" only */
1414                                 if (hw != 0)
1415                                         goto bad_hwif;
1416                                 /* chipset already specified for 2nd port */
1417                                 if (is_chipset_set[hw+1])
1418                                         goto bad_option;
1419                         }
1420                         is_chipset_set[hw] = 1;
1421                         printk("\n");
1422                 }
1423
1424                 switch (i) {
1425 #ifdef CONFIG_BLK_DEV_ALI14XX
1426                         case -17: /* "ali14xx" */
1427                                 probe_ali14xx = 1;
1428                                 goto done;
1429 #endif
1430 #ifdef CONFIG_BLK_DEV_UMC8672
1431                         case -16: /* "umc8672" */
1432                                 probe_umc8672 = 1;
1433                                 goto done;
1434 #endif
1435 #ifdef CONFIG_BLK_DEV_DTC2278
1436                         case -15: /* "dtc2278" */
1437                                 probe_dtc2278 = 1;
1438                                 goto done;
1439 #endif
1440 #ifdef CONFIG_BLK_DEV_CMD640
1441                         case -14: /* "cmd640_vlb" */
1442                         {
1443                                 extern int cmd640_vlb; /* flag for cmd640.c */
1444                                 cmd640_vlb = 1;
1445                                 goto done;
1446                         }
1447 #endif
1448 #ifdef CONFIG_BLK_DEV_HT6560B
1449                         case -13: /* "ht6560b" */
1450                                 probe_ht6560b = 1;
1451                                 goto done;
1452 #endif
1453 #ifdef CONFIG_BLK_DEV_QD65XX
1454                         case -12: /* "qd65xx" */
1455                                 probe_qd65xx = 1;
1456                                 goto done;
1457 #endif
1458 #ifdef CONFIG_BLK_DEV_4DRIVES
1459                         case -11: /* "four" drives on one set of ports */
1460                         {
1461                                 ide_hwif_t *mate = &ide_hwifs[hw^1];
1462                                 mate->drives[0].select.all ^= 0x20;
1463                                 mate->drives[1].select.all ^= 0x20;
1464                                 hwif->chipset = mate->chipset = ide_4drives;
1465                                 mate->irq = hwif->irq;
1466                                 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1467                                 hwif->mate = mate;
1468                                 mate->mate = hwif;
1469                                 hwif->serialized = mate->serialized = 1;
1470                                 goto obsolete_option;
1471                         }
1472 #endif /* CONFIG_BLK_DEV_4DRIVES */
1473                         case -10: /* minus10 */
1474                         case -9: /* minus9 */
1475                         case -8: /* minus8 */
1476                         case -6:
1477                         case -4:
1478                         case -3:
1479                                 goto bad_option;
1480                         case -7: /* ata66 */
1481 #ifdef CONFIG_BLK_DEV_IDEPCI
1482                                 /*
1483                                  * Use ATA_CBL_PATA40_SHORT so drive side
1484                                  * cable detection is also overriden.
1485                                  */
1486                                 hwif->cbl = ATA_CBL_PATA40_SHORT;
1487                                 goto obsolete_option;
1488 #else
1489                                 goto bad_hwif;
1490 #endif
1491                         case -5: /* "reset" */
1492                                 hwif->reset = 1;
1493                                 goto obsolete_option;
1494                         case -2: /* "serialize" */
1495                                 hwif->mate = &ide_hwifs[hw^1];
1496                                 hwif->mate->mate = hwif;
1497                                 hwif->serialized = hwif->mate->serialized = 1;
1498                                 goto obsolete_option;
1499
1500                         case -1: /* "noprobe" */
1501                                 hwif->noprobe = 1;
1502                                 goto done;
1503
1504                         case 1: /* base */
1505                                 vals[1] = vals[0] + 0x206; /* default ctl */
1506                         case 2: /* base,ctl */
1507                                 vals[2] = 0;    /* default irq = probe for it */
1508                         case 3: /* base,ctl,irq */
1509                                 hwif->hw.irq = vals[2];
1510                                 ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq);
1511                                 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
1512                                 hwif->irq      = vals[2];
1513                                 hwif->noprobe  = 0;
1514                                 hwif->chipset  = ide_forced;
1515                                 goto obsolete_option;
1516
1517                         case 0: goto bad_option;
1518                         default:
1519                                 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1520                                 return 1;
1521                 }
1522         }
1523 bad_option:
1524         printk(" -- BAD OPTION\n");
1525         return 1;
1526 obsolete_option:
1527         printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1528         return 1;
1529 bad_hwif:
1530         printk("-- NOT SUPPORTED ON ide%d", hw);
1531 done:
1532         printk("\n");
1533         return 1;
1534 }
1535
1536 extern void __init pnpide_init(void);
1537 extern void __exit pnpide_exit(void);
1538 extern void __init h8300_ide_init(void);
1539
1540 /*
1541  * probe_for_hwifs() finds/initializes "known" IDE interfaces
1542  */
1543 static void __init probe_for_hwifs (void)
1544 {
1545 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1546         ide_scan_pcibus(ide_scan_direction);
1547 #endif
1548
1549 #ifdef CONFIG_ETRAX_IDE
1550         {
1551                 extern void init_e100_ide(void);
1552                 init_e100_ide();
1553         }
1554 #endif /* CONFIG_ETRAX_IDE */
1555 #ifdef CONFIG_BLK_DEV_CMD640
1556         {
1557                 extern void ide_probe_for_cmd640x(void);
1558                 ide_probe_for_cmd640x();
1559         }
1560 #endif /* CONFIG_BLK_DEV_CMD640 */
1561 #ifdef CONFIG_BLK_DEV_IDE_PMAC
1562         {
1563                 extern int pmac_ide_probe(void);
1564                 (void)pmac_ide_probe();
1565         }
1566 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
1567 #ifdef CONFIG_BLK_DEV_GAYLE
1568         {
1569                 extern void gayle_init(void);
1570                 gayle_init();
1571         }
1572 #endif /* CONFIG_BLK_DEV_GAYLE */
1573 #ifdef CONFIG_BLK_DEV_FALCON_IDE
1574         {
1575                 extern void falconide_init(void);
1576                 falconide_init();
1577         }
1578 #endif /* CONFIG_BLK_DEV_FALCON_IDE */
1579 #ifdef CONFIG_BLK_DEV_MAC_IDE
1580         {
1581                 extern void macide_init(void);
1582                 macide_init();
1583         }
1584 #endif /* CONFIG_BLK_DEV_MAC_IDE */
1585 #ifdef CONFIG_BLK_DEV_Q40IDE
1586         {
1587                 extern void q40ide_init(void);
1588                 q40ide_init();
1589         }
1590 #endif /* CONFIG_BLK_DEV_Q40IDE */
1591 #ifdef CONFIG_BLK_DEV_BUDDHA
1592         {
1593                 extern void buddha_init(void);
1594                 buddha_init();
1595         }
1596 #endif /* CONFIG_BLK_DEV_BUDDHA */
1597 #ifdef CONFIG_BLK_DEV_IDEPNP
1598         pnpide_init();
1599 #endif
1600 #ifdef CONFIG_H8300
1601         h8300_ide_init();
1602 #endif
1603 }
1604
1605 /*
1606  * Probe module
1607  */
1608
1609 EXPORT_SYMBOL(ide_lock);
1610
1611 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1612 {
1613         return 1;
1614 }
1615
1616 static char *media_string(ide_drive_t *drive)
1617 {
1618         switch (drive->media) {
1619         case ide_disk:
1620                 return "disk";
1621         case ide_cdrom:
1622                 return "cdrom";
1623         case ide_tape:
1624                 return "tape";
1625         case ide_floppy:
1626                 return "floppy";
1627         case ide_optical:
1628                 return "optical";
1629         default:
1630                 return "UNKNOWN";
1631         }
1632 }
1633
1634 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1635 {
1636         ide_drive_t *drive = to_ide_device(dev);
1637         return sprintf(buf, "%s\n", media_string(drive));
1638 }
1639
1640 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1641 {
1642         ide_drive_t *drive = to_ide_device(dev);
1643         return sprintf(buf, "%s\n", drive->name);
1644 }
1645
1646 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1647 {
1648         ide_drive_t *drive = to_ide_device(dev);
1649         return sprintf(buf, "ide:m-%s\n", media_string(drive));
1650 }
1651
1652 static struct device_attribute ide_dev_attrs[] = {
1653         __ATTR_RO(media),
1654         __ATTR_RO(drivename),
1655         __ATTR_RO(modalias),
1656         __ATTR_NULL
1657 };
1658
1659 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
1660 {
1661         ide_drive_t *drive = to_ide_device(dev);
1662
1663         add_uevent_var(env, "MEDIA=%s", media_string(drive));
1664         add_uevent_var(env, "DRIVENAME=%s", drive->name);
1665         add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
1666         return 0;
1667 }
1668
1669 static int generic_ide_probe(struct device *dev)
1670 {
1671         ide_drive_t *drive = to_ide_device(dev);
1672         ide_driver_t *drv = to_ide_driver(dev->driver);
1673
1674         return drv->probe ? drv->probe(drive) : -ENODEV;
1675 }
1676
1677 static int generic_ide_remove(struct device *dev)
1678 {
1679         ide_drive_t *drive = to_ide_device(dev);
1680         ide_driver_t *drv = to_ide_driver(dev->driver);
1681
1682         if (drv->remove)
1683                 drv->remove(drive);
1684
1685         return 0;
1686 }
1687
1688 static void generic_ide_shutdown(struct device *dev)
1689 {
1690         ide_drive_t *drive = to_ide_device(dev);
1691         ide_driver_t *drv = to_ide_driver(dev->driver);
1692
1693         if (dev->driver && drv->shutdown)
1694                 drv->shutdown(drive);
1695 }
1696
1697 struct bus_type ide_bus_type = {
1698         .name           = "ide",
1699         .match          = ide_bus_match,
1700         .uevent         = ide_uevent,
1701         .probe          = generic_ide_probe,
1702         .remove         = generic_ide_remove,
1703         .shutdown       = generic_ide_shutdown,
1704         .dev_attrs      = ide_dev_attrs,
1705         .suspend        = generic_ide_suspend,
1706         .resume         = generic_ide_resume,
1707 };
1708
1709 EXPORT_SYMBOL_GPL(ide_bus_type);
1710
1711 /*
1712  * This is gets invoked once during initialization, to set *everything* up
1713  */
1714 static int __init ide_init(void)
1715 {
1716         int ret;
1717
1718         printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
1719         system_bus_speed = ide_system_bus_speed();
1720
1721         ret = bus_register(&ide_bus_type);
1722         if (ret < 0) {
1723                 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1724                 return ret;
1725         }
1726
1727         init_ide_data();
1728
1729         proc_ide_create();
1730
1731 #ifdef CONFIG_BLK_DEV_ALI14XX
1732         if (probe_ali14xx)
1733                 (void)ali14xx_init();
1734 #endif
1735 #ifdef CONFIG_BLK_DEV_UMC8672
1736         if (probe_umc8672)
1737                 (void)umc8672_init();
1738 #endif
1739 #ifdef CONFIG_BLK_DEV_DTC2278
1740         if (probe_dtc2278)
1741                 (void)dtc2278_init();
1742 #endif
1743 #ifdef CONFIG_BLK_DEV_HT6560B
1744         if (probe_ht6560b)
1745                 (void)ht6560b_init();
1746 #endif
1747 #ifdef CONFIG_BLK_DEV_QD65XX
1748         if (probe_qd65xx)
1749                 (void)qd65xx_init();
1750 #endif
1751
1752         /* Probe for special PCI and other "known" interface chipsets. */
1753         probe_for_hwifs();
1754
1755         return 0;
1756 }
1757
1758 #ifdef MODULE
1759 static char *options = NULL;
1760 module_param(options, charp, 0);
1761 MODULE_LICENSE("GPL");
1762
1763 static void __init parse_options (char *line)
1764 {
1765         char *next = line;
1766
1767         if (line == NULL || !*line)
1768                 return;
1769         while ((line = next) != NULL) {
1770                 if ((next = strchr(line,' ')) != NULL)
1771                         *next++ = 0;
1772                 if (!ide_setup(line))
1773                         printk (KERN_INFO "Unknown option '%s'\n", line);
1774         }
1775 }
1776
1777 int __init init_module (void)
1778 {
1779         parse_options(options);
1780         return ide_init();
1781 }
1782
1783 void __exit cleanup_module (void)
1784 {
1785         int index;
1786
1787         for (index = 0; index < MAX_HWIFS; ++index)
1788                 ide_unregister(index);
1789
1790 #ifdef CONFIG_BLK_DEV_IDEPNP
1791         pnpide_exit();
1792 #endif
1793
1794         proc_ide_destroy();
1795
1796         bus_unregister(&ide_bus_type);
1797 }
1798
1799 #else /* !MODULE */
1800
1801 __setup("", ide_setup);
1802
1803 module_init(ide_init);
1804
1805 #endif /* MODULE */