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         hwif->atapi_dma = 0;            /* disable all atapi dma */
 138
 139         init_completion(&hwif->gendev_rel_comp);
 140
 141         default_hwif_iops(hwif);
 142         default_hwif_transport(hwif);
 143         for (unit = 0; unit < MAX_DRIVES; ++unit) {
 144                 ide_drive_t *drive = &hwif->drives[unit];
 145
 146                 drive->media                    = ide_disk;
 147                 drive->select.all               = (unit<<4)|0xa0;
 148                 drive->hwif                     = hwif;
 149                 drive->ctl                      = 0x08;
 150                 drive->ready_stat               = READY_STAT;
 151                 drive->bad_wstat                = BAD_W_STAT;
 152                 drive->special.b.recalibrate    = 1;
 153                 drive->special.b.set_geometry   = 1;
 154                 drive->name[0]                  = 'h';
 155                 drive->name[1]                  = 'd';
 156                 drive->name[2]                  = 'a' + (index * MAX_DRIVES) + unit;
 157                 drive->max_failures             = IDE_DEFAULT_MAX_FAILURES;
 158                 drive->using_dma                = 0;
 159                 drive->vdma                     = 0;
 160                 INIT_LIST_HEAD(&drive->list);
 161                 init_completion(&drive->gendev_rel_comp);
 162         }
 163 }
 164
 165 static void init_hwif_default(ide_hwif_t *hwif, unsigned int index)
 166 {
 167         hw_regs_t hw;
 168
 169         memset(&hw, 0, sizeof(hw_regs_t));
 170
 171         ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq);
 172
 173         memcpy(&hwif->hw, &hw, sizeof(hw));
 174         memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
 175
 176         hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
 177 #ifdef CONFIG_BLK_DEV_HD
 178         if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA)
 179                 hwif->noprobe = 1;      /* may be overridden by ide_setup() */
 180 #endif
 181 }
 182
 183 extern void ide_arm_init(void);
 184
 185 /*
 186  * init_ide_data() sets reasonable default values into all fields
 187  * of all instances of the hwifs and drives, but only on the first call.
 188  * Subsequent calls have no effect (they don't wipe out anything).
 189  *
 190  * This routine is normally called at driver initialization time,
 191  * but may also be called MUCH earlier during kernel "command-line"
 192  * parameter processing.  As such, we cannot depend on any other parts
 193  * of the kernel (such as memory allocation) to be functioning yet.
 194  *
 195  * This is too bad, as otherwise we could dynamically allocate the
 196  * ide_drive_t structs as needed, rather than always consuming memory
 197  * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
 198  *
 199  * FIXME: We should stuff the setup data into __init and copy the
 200  * relevant hwifs/allocate them properly during boot.
 201  */
 202 #define MAGIC_COOKIE 0x12345678
 203 static void __init init_ide_data (void)
 204 {
 205         ide_hwif_t *hwif;
 206         unsigned int index;
 207         static unsigned long magic_cookie = MAGIC_COOKIE;
 208
 209         if (magic_cookie != MAGIC_COOKIE)
 210                 return;         /* already initialized */
 211         magic_cookie = 0;
 212
 213         /* Initialise all interface structures */
 214         for (index = 0; index < MAX_HWIFS; ++index) {
 215                 hwif = &ide_hwifs[index];
 216                 init_hwif_data(hwif, index);
 217                 init_hwif_default(hwif, index);
 218 #if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
 219                 hwif->irq = hwif->hw.irq =
 220                         ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
 221 #endif
 222         }
 223 #ifdef CONFIG_IDE_ARM
 224         ide_arm_init();
 225 #endif
 226 }
 227
 228 /**
 229  *      ide_system_bus_speed    -       guess bus speed
 230  *
 231  *      ide_system_bus_speed() returns what we think is the system VESA/PCI
 232  *      bus speed (in MHz). This is used for calculating interface PIO timings.
 233  *      The default is 40 for known PCI systems, 50 otherwise.
 234  *      The "idebus=xx" parameter can be used to override this value.
 235  *      The actual value to be used is computed/displayed the first time
 236  *      through. Drivers should only use this as a last resort.
 237  *
 238  *      Returns a guessed speed in MHz.
 239  */
 240
 241 static int ide_system_bus_speed(void)
 242 {
 243 #ifdef CONFIG_PCI
 244         static struct pci_device_id pci_default[] = {
 245                 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
 246                 { }
 247         };
 248 #else
 249 #define pci_default 0
 250 #endif /* CONFIG_PCI */
 251
 252         if (!system_bus_speed) {
 253                 if (idebus_parameter) {
 254                         /* user supplied value */
 255                         system_bus_speed = idebus_parameter;
 256                 } else if (pci_dev_present(pci_default)) {
 257                         /* safe default value for PCI */
 258                         system_bus_speed = 33;
 259                 } else {
 260                         /* safe default value for VESA and PCI */
 261                         system_bus_speed = 50;
 262                 }
 263                 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
 264                         "for PIO modes%s\n", system_bus_speed,
 265                         idebus_parameter ? "" : "; override with idebus=xx");
 266         }
 267         return system_bus_speed;
 268 }
 269
 270 static struct resource* hwif_request_region(ide_hwif_t *hwif,
 271                                             unsigned long addr, int num)
 272 {
 273         struct resource *res = request_region(addr, num, hwif->name);
 274
 275         if (!res)
 276                 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
 277                                 hwif->name, addr, addr+num-1);
 278         return res;
 279 }
 280
 281 /**
 282  *      ide_hwif_request_regions - request resources for IDE
 283  *      @hwif: interface to use
 284  *
 285  *      Requests all the needed resources for an interface.
 286  *      Right now core IDE code does this work which is deeply wrong.
 287  *      MMIO leaves it to the controller driver,
 288  *      PIO will migrate this way over time.
 289  */
 290
 291 int ide_hwif_request_regions(ide_hwif_t *hwif)
 292 {
 293         unsigned long addr;
 294         unsigned int i;
 295
 296         if (hwif->mmio)
 297                 return 0;
 298         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
 299         if (addr && !hwif_request_region(hwif, addr, 1))
 300                 goto control_region_busy;
 301         hwif->straight8 = 0;
 302         addr = hwif->io_ports[IDE_DATA_OFFSET];
 303         if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
 304                 if (!hwif_request_region(hwif, addr, 8))
 305                         goto data_region_busy;
 306                 hwif->straight8 = 1;
 307                 return 0;
 308         }
 309         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
 310                 addr = hwif->io_ports[i];
 311                 if (!hwif_request_region(hwif, addr, 1)) {
 312                         while (--i)
 313                                 release_region(addr, 1);
 314                         goto data_region_busy;
 315                 }
 316         }
 317         return 0;
 318
 319 data_region_busy:
 320         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
 321         if (addr)
 322                 release_region(addr, 1);
 323 control_region_busy:
 324         /* If any errors are return, we drop the hwif interface. */
 325         return -EBUSY;
 326 }
 327
 328 /**
 329  *      ide_hwif_release_regions - free IDE resources
 330  *
 331  *      Note that we only release the standard ports,
 332  *      and do not even try to handle any extra ports
 333  *      allocated for weird IDE interface chipsets.
 334  *
 335  *      Note also that we don't yet handle mmio resources here. More
 336  *      importantly our caller should be doing this so we need to
 337  *      restructure this as a helper function for drivers.
 338  */
 339
 340 void ide_hwif_release_regions(ide_hwif_t *hwif)
 341 {
 342         u32 i = 0;
 343
 344         if (hwif->mmio)
 345                 return;
 346         if (hwif->io_ports[IDE_CONTROL_OFFSET])
 347                 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
 348         if (hwif->straight8) {
 349                 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
 350                 return;
 351         }
 352         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
 353                 if (hwif->io_ports[i])
 354                         release_region(hwif->io_ports[i], 1);
 355 }
 356
 357 /**
 358  *      ide_hwif_restore        -       restore hwif to template
 359  *      @hwif: hwif to update
 360  *      @tmp_hwif: template
 361  *
 362  *      Restore hwif to a previous state by copying most settings
 363  *      from the template.
 364  */
 365
 366 static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
 367 {
 368         hwif->hwgroup                   = tmp_hwif->hwgroup;
 369
 370         hwif->gendev.parent             = tmp_hwif->gendev.parent;
 371
 372         hwif->proc                      = tmp_hwif->proc;
 373
 374         hwif->major                     = tmp_hwif->major;
 375         hwif->straight8                 = tmp_hwif->straight8;
 376         hwif->bus_state                 = tmp_hwif->bus_state;
 377
 378         hwif->host_flags                = tmp_hwif->host_flags;
 379
 380         hwif->pio_mask                  = tmp_hwif->pio_mask;
 381
 382         hwif->atapi_dma                 = tmp_hwif->atapi_dma;
 383         hwif->ultra_mask                = tmp_hwif->ultra_mask;
 384         hwif->mwdma_mask                = tmp_hwif->mwdma_mask;
 385         hwif->swdma_mask                = tmp_hwif->swdma_mask;
 386
 387         hwif->cbl                       = tmp_hwif->cbl;
 388
 389         hwif->chipset                   = tmp_hwif->chipset;
 390         hwif->hold                      = tmp_hwif->hold;
 391
 392 #ifdef CONFIG_BLK_DEV_IDEPCI
 393         hwif->pci_dev                   = tmp_hwif->pci_dev;
 394         hwif->cds                       = tmp_hwif->cds;
 395 #endif
 396
 397         hwif->set_pio_mode              = tmp_hwif->set_pio_mode;
 398         hwif->set_dma_mode              = tmp_hwif->set_dma_mode;
 399         hwif->mdma_filter               = tmp_hwif->mdma_filter;
 400         hwif->udma_filter               = tmp_hwif->udma_filter;
 401         hwif->selectproc                = tmp_hwif->selectproc;
 402         hwif->reset_poll                = tmp_hwif->reset_poll;
 403         hwif->pre_reset                 = tmp_hwif->pre_reset;
 404         hwif->resetproc                 = tmp_hwif->resetproc;
 405         hwif->intrproc                  = tmp_hwif->intrproc;
 406         hwif->maskproc                  = tmp_hwif->maskproc;
 407         hwif->quirkproc                 = tmp_hwif->quirkproc;
 408         hwif->busproc                   = tmp_hwif->busproc;
 409
 410         hwif->ata_input_data            = tmp_hwif->ata_input_data;
 411         hwif->ata_output_data           = tmp_hwif->ata_output_data;
 412         hwif->atapi_input_bytes         = tmp_hwif->atapi_input_bytes;
 413         hwif->atapi_output_bytes        = tmp_hwif->atapi_output_bytes;
 414
 415         hwif->dma_setup                 = tmp_hwif->dma_setup;
 416         hwif->dma_exec_cmd              = tmp_hwif->dma_exec_cmd;
 417         hwif->dma_start                 = tmp_hwif->dma_start;
 418         hwif->ide_dma_end               = tmp_hwif->ide_dma_end;
 419         hwif->ide_dma_on                = tmp_hwif->ide_dma_on;
 420         hwif->dma_off_quietly           = tmp_hwif->dma_off_quietly;
 421         hwif->ide_dma_test_irq          = tmp_hwif->ide_dma_test_irq;
 422         hwif->ide_dma_clear_irq         = tmp_hwif->ide_dma_clear_irq;
 423         hwif->dma_host_on               = tmp_hwif->dma_host_on;
 424         hwif->dma_host_off              = tmp_hwif->dma_host_off;
 425         hwif->dma_lost_irq              = tmp_hwif->dma_lost_irq;
 426         hwif->dma_timeout               = tmp_hwif->dma_timeout;
 427
 428         hwif->OUTB                      = tmp_hwif->OUTB;
 429         hwif->OUTBSYNC                  = tmp_hwif->OUTBSYNC;
 430         hwif->OUTW                      = tmp_hwif->OUTW;
 431         hwif->OUTSW                     = tmp_hwif->OUTSW;
 432         hwif->OUTSL                     = tmp_hwif->OUTSL;
 433
 434         hwif->INB                       = tmp_hwif->INB;
 435         hwif->INW                       = tmp_hwif->INW;
 436         hwif->INSW                      = tmp_hwif->INSW;
 437         hwif->INSL                      = tmp_hwif->INSL;
 438
 439         hwif->sg_max_nents              = tmp_hwif->sg_max_nents;
 440
 441         hwif->mmio                      = tmp_hwif->mmio;
 442         hwif->rqsize                    = tmp_hwif->rqsize;
 443         hwif->no_lba48                  = tmp_hwif->no_lba48;
 444
 445 #ifndef CONFIG_BLK_DEV_IDECS
 446         hwif->irq                       = tmp_hwif->irq;
 447 #endif
 448
 449         hwif->dma_base                  = tmp_hwif->dma_base;
 450         hwif->dma_master                = tmp_hwif->dma_master;
 451         hwif->dma_command               = tmp_hwif->dma_command;
 452         hwif->dma_vendor1               = tmp_hwif->dma_vendor1;
 453         hwif->dma_status                = tmp_hwif->dma_status;
 454         hwif->dma_vendor3               = tmp_hwif->dma_vendor3;
 455         hwif->dma_prdtable              = tmp_hwif->dma_prdtable;
 456
 457         hwif->config_data               = tmp_hwif->config_data;
 458         hwif->select_data               = tmp_hwif->select_data;
 459         hwif->extra_base                = tmp_hwif->extra_base;
 460         hwif->extra_ports               = tmp_hwif->extra_ports;
 461         hwif->autodma                   = tmp_hwif->autodma;
 462
 463         hwif->hwif_data                 = tmp_hwif->hwif_data;
 464 }
 465
 466 /**
 467  *      ide_unregister          -       free an IDE interface
 468  *      @index: index of interface (will change soon to a pointer)
 469  *
 470  *      Perform the final unregister of an IDE interface. At the moment
 471  *      we don't refcount interfaces so this will also get split up.
 472  *
 473  *      Locking:
 474  *      The caller must not hold the IDE locks
 475  *      The drive present/vanishing is not yet properly locked
 476  *      Take care with the callbacks. These have been split to avoid
 477  *      deadlocking the IDE layer. The shutdown callback is called
 478  *      before we take the lock and free resources. It is up to the
 479  *      caller to be sure there is no pending I/O here, and that
 480  *      the interface will not be reopened (present/vanishing locking
 481  *      isn't yet done BTW). After we commit to the final kill we
 482  *      call the cleanup callback with the ide locks held.
 483  *
 484  *      Unregister restores the hwif structures to the default state.
 485  *      This is raving bonkers.
 486  */
 487
 488 void ide_unregister(unsigned int index)
 489 {
 490         ide_drive_t *drive;
 491         ide_hwif_t *hwif, *g;
 492         static ide_hwif_t tmp_hwif; /* protected by ide_cfg_mtx */
 493         ide_hwgroup_t *hwgroup;
 494         int irq_count = 0, unit;
 495
 496         BUG_ON(index >= MAX_HWIFS);
 497
 498         BUG_ON(in_interrupt());
 499         BUG_ON(irqs_disabled());
 500         mutex_lock(&ide_cfg_mtx);
 501         spin_lock_irq(&ide_lock);
 502         hwif = &ide_hwifs[index];
 503         if (!hwif->present)
 504                 goto abort;
 505         for (unit = 0; unit < MAX_DRIVES; ++unit) {
 506                 drive = &hwif->drives[unit];
 507                 if (!drive->present)
 508                         continue;
 509                 spin_unlock_irq(&ide_lock);
 510                 device_unregister(&drive->gendev);
 511                 wait_for_completion(&drive->gendev_rel_comp);
 512                 spin_lock_irq(&ide_lock);
 513         }
 514         hwif->present = 0;
 515
 516         spin_unlock_irq(&ide_lock);
 517
 518         ide_proc_unregister_port(hwif);
 519
 520         hwgroup = hwif->hwgroup;
 521         /*
 522          * free the irq if we were the only hwif using it
 523          */
 524         g = hwgroup->hwif;
 525         do {
 526                 if (g->irq == hwif->irq)
 527                         ++irq_count;
 528                 g = g->next;
 529         } while (g != hwgroup->hwif);
 530         if (irq_count == 1)
 531                 free_irq(hwif->irq, hwgroup);
 532
 533         spin_lock_irq(&ide_lock);
 534         /*
 535          * Note that we only release the standard ports,
 536          * and do not even try to handle any extra ports
 537          * allocated for weird IDE interface chipsets.
 538          */
 539         ide_hwif_release_regions(hwif);
 540
 541         /*
 542          * Remove us from the hwgroup, and free
 543          * the hwgroup if we were the only member
 544          */
 545         if (hwif->next == hwif) {
 546                 BUG_ON(hwgroup->hwif != hwif);
 547                 kfree(hwgroup);
 548         } else {
 549                 /* There is another interface in hwgroup.
 550                  * Unlink us, and set hwgroup->drive and ->hwif to
 551                  * something sane.
 552                  */
 553                 g = hwgroup->hwif;
 554                 while (g->next != hwif)
 555                         g = g->next;
 556                 g->next = hwif->next;
 557                 if (hwgroup->hwif == hwif) {
 558                         /* Chose a random hwif for hwgroup->hwif.
 559                          * It's guaranteed that there are no drives
 560                          * left in the hwgroup.
 561                          */
 562                         BUG_ON(hwgroup->drive != NULL);
 563                         hwgroup->hwif = g;
 564                 }
 565                 BUG_ON(hwgroup->hwif == hwif);
 566         }
 567
 568         /* More messed up locking ... */
 569         spin_unlock_irq(&ide_lock);
 570         device_unregister(&hwif->gendev);
 571         wait_for_completion(&hwif->gendev_rel_comp);
 572
 573         /*
 574          * Remove us from the kernel's knowledge
 575          */
 576         blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
 577         kfree(hwif->sg_table);
 578         unregister_blkdev(hwif->major, hwif->name);
 579         spin_lock_irq(&ide_lock);
 580
 581         if (hwif->dma_base) {
 582                 (void) ide_release_dma(hwif);
 583
 584                 hwif->dma_base = 0;
 585                 hwif->dma_master = 0;
 586                 hwif->dma_command = 0;
 587                 hwif->dma_vendor1 = 0;
 588                 hwif->dma_status = 0;
 589                 hwif->dma_vendor3 = 0;
 590                 hwif->dma_prdtable = 0;
 591
 592                 hwif->extra_base  = 0;
 593                 hwif->extra_ports = 0;
 594         }
 595
 596         /* copy original settings */
 597         tmp_hwif = *hwif;
 598
 599         /* restore hwif data to pristine status */
 600         init_hwif_data(hwif, index);
 601         init_hwif_default(hwif, index);
 602
 603         ide_hwif_restore(hwif, &tmp_hwif);
 604
 605 abort:
 606         spin_unlock_irq(&ide_lock);
 607         mutex_unlock(&ide_cfg_mtx);
 608 }
 609
 610 EXPORT_SYMBOL(ide_unregister);
 611
 612
 613 /**
 614  *      ide_setup_ports         -       set up IDE interface ports
 615  *      @hw: register descriptions
 616  *      @base: base register
 617  *      @offsets: table of register offsets
 618  *      @ctrl: control register
 619  *      @ack_irq: IRQ ack
 620  *      @irq: interrupt lie
 621  *
 622  *      Setup hw_regs_t structure described by parameters.  You
 623  *      may set up the hw structure yourself OR use this routine to
 624  *      do it for you. This is basically a helper
 625  *
 626  */
 627
 628 void ide_setup_ports (  hw_regs_t *hw,
 629                         unsigned long base, int *offsets,
 630                         unsigned long ctrl, unsigned long intr,
 631                         ide_ack_intr_t *ack_intr,
 632 /*
 633  *                      ide_io_ops_t *iops,
 634  */
 635                         int irq)
 636 {
 637         int i;
 638
 639         memset(hw, 0, sizeof(hw_regs_t));
 640         for (i = 0; i < IDE_NR_PORTS; i++) {
 641                 if (offsets[i] == -1) {
 642                         switch(i) {
 643                                 case IDE_CONTROL_OFFSET:
 644                                         hw->io_ports[i] = ctrl;
 645                                         break;
 646 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
 647                                 case IDE_IRQ_OFFSET:
 648                                         hw->io_ports[i] = intr;
 649                                         break;
 650 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
 651                                 default:
 652                                         hw->io_ports[i] = 0;
 653                                         break;
 654                         }
 655                 } else {
 656                         hw->io_ports[i] = base + offsets[i];
 657                 }
 658         }
 659         hw->irq = irq;
 660         hw->dma = NO_DMA;
 661         hw->ack_intr = ack_intr;
 662 /*
 663  *      hw->iops = iops;
 664  */
 665 }
 666
 667 /**
 668  *      ide_register_hw_with_fixup      -       register IDE interface
 669  *      @hw: hardware registers
 670  *      @initializing: set while initializing built-in drivers
 671  *      @hwifp: pointer to returned hwif
 672  *      @fixup: fixup function
 673  *
 674  *      Register an IDE interface, specifying exactly the registers etc.
 675  *      Set init=1 iff calling before probes have taken place.
 676  *
 677  *      Returns -1 on error.
 678  */
 679
 680 int ide_register_hw_with_fixup(hw_regs_t *hw, int initializing,
 681                                ide_hwif_t **hwifp,
 682                                void(*fixup)(ide_hwif_t *hwif))
 683 {
 684         int index, retry = 1;
 685         ide_hwif_t *hwif;
 686
 687         do {
 688                 for (index = 0; index < MAX_HWIFS; ++index) {
 689                         hwif = &ide_hwifs[index];
 690                         if (hwif->hw.io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
 691                                 goto found;
 692                 }
 693                 for (index = 0; index < MAX_HWIFS; ++index) {
 694                         hwif = &ide_hwifs[index];
 695                         if (hwif->hold)
 696                                 continue;
 697                         if ((!hwif->present && !hwif->mate && !initializing) ||
 698                             (!hwif->hw.io_ports[IDE_DATA_OFFSET] && initializing))
 699                                 goto found;
 700                 }
 701                 for (index = 0; index < MAX_HWIFS; index++)
 702                         ide_unregister(index);
 703         } while (retry--);
 704         return -1;
 705 found:
 706         if (hwif->present)
 707                 ide_unregister(index);
 708         else if (!hwif->hold) {
 709                 init_hwif_data(hwif, index);
 710                 init_hwif_default(hwif, index);
 711         }
 712         if (hwif->present)
 713                 return -1;
 714         memcpy(&hwif->hw, hw, sizeof(*hw));
 715         memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports));
 716         hwif->irq = hw->irq;
 717         hwif->noprobe = 0;
 718         hwif->chipset = hw->chipset;
 719         hwif->gendev.parent = hw->dev;
 720
 721         if (!initializing) {
 722                 probe_hwif_init_with_fixup(hwif, fixup);
 723                 ide_proc_register_port(hwif);
 724         }
 725
 726         if (hwifp)
 727                 *hwifp = hwif;
 728
 729         return (initializing || hwif->present) ? index : -1;
 730 }
 731
 732 EXPORT_SYMBOL(ide_register_hw_with_fixup);
 733
 734 int ide_register_hw(hw_regs_t *hw, int initializing, ide_hwif_t **hwifp)
 735 {
 736         return ide_register_hw_with_fixup(hw, initializing, hwifp, NULL);
 737 }
 738
 739 EXPORT_SYMBOL(ide_register_hw);
 740
 741 /*
 742  *      Locks for IDE setting functionality
 743  */
 744
 745 DEFINE_MUTEX(ide_setting_mtx);
 746
 747 EXPORT_SYMBOL_GPL(ide_setting_mtx);
 748
 749 /**
 750  *      ide_spin_wait_hwgroup   -       wait for group
 751  *      @drive: drive in the group
 752  *
 753  *      Wait for an IDE device group to go non busy and then return
 754  *      holding the ide_lock which guards the hwgroup->busy status
 755  *      and right to use it.
 756  */
 757
 758 int ide_spin_wait_hwgroup (ide_drive_t *drive)
 759 {
 760         ide_hwgroup_t *hwgroup = HWGROUP(drive);
 761         unsigned long timeout = jiffies + (3 * HZ);
 762
 763         spin_lock_irq(&ide_lock);
 764
 765         while (hwgroup->busy) {
 766                 unsigned long lflags;
 767                 spin_unlock_irq(&ide_lock);
 768                 local_irq_set(lflags);
 769                 if (time_after(jiffies, timeout)) {
 770                         local_irq_restore(lflags);
 771                         printk(KERN_ERR "%s: channel busy\n", drive->name);
 772                         return -EBUSY;
 773                 }
 774                 local_irq_restore(lflags);
 775                 spin_lock_irq(&ide_lock);
 776         }
 777         return 0;
 778 }
 779
 780 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
 781
 782 int set_io_32bit(ide_drive_t *drive, int arg)
 783 {
 784         if (drive->no_io_32bit)
 785                 return -EPERM;
 786
 787         if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
 788                 return -EINVAL;
 789
 790         drive->io_32bit = arg;
 791 #ifdef CONFIG_BLK_DEV_DTC2278
 792         if (HWIF(drive)->chipset == ide_dtc2278)
 793                 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
 794 #endif /* CONFIG_BLK_DEV_DTC2278 */
 795         return 0;
 796 }
 797
 798 static int set_ksettings(ide_drive_t *drive, int arg)
 799 {
 800         if (arg < 0 || arg > 1)
 801                 return -EINVAL;
 802
 803         if (ide_spin_wait_hwgroup(drive))
 804                 return -EBUSY;
 805         drive->keep_settings = arg;
 806         spin_unlock_irq(&ide_lock);
 807
 808         return 0;
 809 }
 810
 811 int set_using_dma(ide_drive_t *drive, int arg)
 812 {
 813 #ifdef CONFIG_BLK_DEV_IDEDMA
 814         ide_hwif_t *hwif = drive->hwif;
 815         int err = -EPERM;
 816
 817         if (arg < 0 || arg > 1)
 818                 return -EINVAL;
 819
 820         if (!drive->id || !(drive->id->capability & 1))
 821                 goto out;
 822
 823         if (hwif->ide_dma_on == NULL)
 824                 goto out;
 825
 826         err = -EBUSY;
 827         if (ide_spin_wait_hwgroup(drive))
 828                 goto out;
 829         /*
 830          * set ->busy flag, unlock and let it ride
 831          */
 832         hwif->hwgroup->busy = 1;
 833         spin_unlock_irq(&ide_lock);
 834
 835         err = 0;
 836
 837         if (arg) {
 838                 hwif->dma_off_quietly(drive);
 839                 if (ide_set_dma(drive) || hwif->ide_dma_on(drive))
 840                         err = -EIO;
 841         } else
 842                 ide_dma_off(drive);
 843
 844         /*
 845          * lock, clear ->busy flag and unlock before leaving
 846          */
 847         spin_lock_irq(&ide_lock);
 848         hwif->hwgroup->busy = 0;
 849         spin_unlock_irq(&ide_lock);
 850 out:
 851         return err;
 852 #else
 853         if (arg < 0 || arg > 1)
 854                 return -EINVAL;
 855
 856         return -EPERM;
 857 #endif
 858 }
 859
 860 int set_pio_mode(ide_drive_t *drive, int arg)
 861 {
 862         struct request rq;
 863
 864         if (arg < 0 || arg > 255)
 865                 return -EINVAL;
 866
 867         if (drive->hwif->set_pio_mode == NULL)
 868                 return -ENOSYS;
 869
 870         if (drive->special.b.set_tune)
 871                 return -EBUSY;
 872         ide_init_drive_cmd(&rq);
 873         drive->tune_req = (u8) arg;
 874         drive->special.b.set_tune = 1;
 875         (void) ide_do_drive_cmd(drive, &rq, ide_wait);
 876         return 0;
 877 }
 878
 879 static int set_unmaskirq(ide_drive_t *drive, int arg)
 880 {
 881         if (drive->no_unmask)
 882                 return -EPERM;
 883
 884         if (arg < 0 || arg > 1)
 885                 return -EINVAL;
 886
 887         if (ide_spin_wait_hwgroup(drive))
 888                 return -EBUSY;
 889         drive->unmask = arg;
 890         spin_unlock_irq(&ide_lock);
 891
 892         return 0;
 893 }
 894
 895 /**
 896  *      system_bus_clock        -       clock guess
 897  *
 898  *      External version of the bus clock guess used by very old IDE drivers
 899  *      for things like VLB timings. Should not be used.
 900  */
 901
 902 int system_bus_clock (void)
 903 {
 904         return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
 905 }
 906
 907 EXPORT_SYMBOL(system_bus_clock);
 908
 909 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
 910 {
 911         ide_drive_t *drive = dev->driver_data;
 912         ide_hwif_t *hwif = HWIF(drive);
 913         struct request rq;
 914         struct request_pm_state rqpm;
 915         ide_task_t args;
 916         int ret;
 917
 918         /* Call ACPI _GTM only once */
 919         if (!(drive->dn % 2))
 920                 ide_acpi_get_timing(hwif);
 921
 922         memset(&rq, 0, sizeof(rq));
 923         memset(&rqpm, 0, sizeof(rqpm));
 924         memset(&args, 0, sizeof(args));
 925         rq.cmd_type = REQ_TYPE_PM_SUSPEND;
 926         rq.special = &args;
 927         rq.data = &rqpm;
 928         rqpm.pm_step = ide_pm_state_start_suspend;
 929         if (mesg.event == PM_EVENT_PRETHAW)
 930                 mesg.event = PM_EVENT_FREEZE;
 931         rqpm.pm_state = mesg.event;
 932
 933         ret = ide_do_drive_cmd(drive, &rq, ide_wait);
 934         /* only call ACPI _PS3 after both drivers are suspended */
 935         if (!ret && (((drive->dn % 2) && hwif->drives[0].present
 936                  && hwif->drives[1].present)
 937                  || !hwif->drives[0].present
 938                  || !hwif->drives[1].present))
 939                 ide_acpi_set_state(hwif, 0);
 940         return ret;
 941 }
 942
 943 static int generic_ide_resume(struct device *dev)
 944 {
 945         ide_drive_t *drive = dev->driver_data;
 946         ide_hwif_t *hwif = HWIF(drive);
 947         struct request rq;
 948         struct request_pm_state rqpm;
 949         ide_task_t args;
 950         int err;
 951
 952         /* Call ACPI _STM only once */
 953         if (!(drive->dn % 2)) {
 954                 ide_acpi_set_state(hwif, 1);
 955                 ide_acpi_push_timing(hwif);
 956         }
 957
 958         ide_acpi_exec_tfs(drive);
 959
 960         memset(&rq, 0, sizeof(rq));
 961         memset(&rqpm, 0, sizeof(rqpm));
 962         memset(&args, 0, sizeof(args));
 963         rq.cmd_type = REQ_TYPE_PM_RESUME;
 964         rq.special = &args;
 965         rq.data = &rqpm;
 966         rqpm.pm_step = ide_pm_state_start_resume;
 967         rqpm.pm_state = PM_EVENT_ON;
 968
 969         err = ide_do_drive_cmd(drive, &rq, ide_head_wait);
 970
 971         if (err == 0 && dev->driver) {
 972                 ide_driver_t *drv = to_ide_driver(dev->driver);
 973
 974                 if (drv->resume)
 975                         drv->resume(drive);
 976         }
 977
 978         return err;
 979 }
 980
 981 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
 982                         unsigned int cmd, unsigned long arg)
 983 {
 984         unsigned long flags;
 985         ide_driver_t *drv;
 986         void __user *p = (void __user *)arg;
 987         int err = 0, (*setfunc)(ide_drive_t *, int);
 988         u8 *val;
 989
 990         switch (cmd) {
 991         case HDIO_GET_32BIT:        val = &drive->io_32bit;      goto read_val;
 992         case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
 993         case HDIO_GET_UNMASKINTR:   val = &drive->unmask;        goto read_val;
 994         case HDIO_GET_DMA:          val = &drive->using_dma;     goto read_val;
 995         case HDIO_SET_32BIT:        setfunc = set_io_32bit;      goto set_val;
 996         case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings;     goto set_val;
 997         case HDIO_SET_PIO_MODE:     setfunc = set_pio_mode;      goto set_val;
 998         case HDIO_SET_UNMASKINTR:   setfunc = set_unmaskirq;     goto set_val;
 999         case HDIO_SET_DMA:          setfunc = set_using_dma;     goto set_val;
1000         }
1001
1002         switch (cmd) {
1003                 case HDIO_OBSOLETE_IDENTITY:
1004                 case HDIO_GET_IDENTITY:
1005                         if (bdev != bdev->bd_contains)
1006                                 return -EINVAL;
1007                         if (drive->id_read == 0)
1008                                 return -ENOMSG;
1009                         if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1010                                 return -EFAULT;
1011                         return 0;
1012
1013                 case HDIO_GET_NICE:
1014                         return put_user(drive->dsc_overlap      <<      IDE_NICE_DSC_OVERLAP    |
1015                                         drive->atapi_overlap    <<      IDE_NICE_ATAPI_OVERLAP  |
1016                                         drive->nice0            <<      IDE_NICE_0              |
1017                                         drive->nice1            <<      IDE_NICE_1              |
1018                                         drive->nice2            <<      IDE_NICE_2,
1019                                         (long __user *) arg);
1020
1021 #ifdef CONFIG_IDE_TASK_IOCTL
1022                 case HDIO_DRIVE_TASKFILE:
1023                         if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1024                                 return -EACCES;
1025                         switch(drive->media) {
1026                                 case ide_disk:
1027                                         return ide_taskfile_ioctl(drive, cmd, arg);
1028                                 default:
1029                                         return -ENOMSG;
1030                         }
1031 #endif /* CONFIG_IDE_TASK_IOCTL */
1032
1033                 case HDIO_DRIVE_CMD:
1034                         if (!capable(CAP_SYS_RAWIO))
1035                                 return -EACCES;
1036                         return ide_cmd_ioctl(drive, cmd, arg);
1037
1038                 case HDIO_DRIVE_TASK:
1039                         if (!capable(CAP_SYS_RAWIO))
1040                                 return -EACCES;
1041                         return ide_task_ioctl(drive, cmd, arg);
1042
1043                 case HDIO_SCAN_HWIF:
1044                 {
1045                         hw_regs_t hw;
1046                         int args[3];
1047                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1048                         if (copy_from_user(args, p, 3 * sizeof(int)))
1049                                 return -EFAULT;
1050                         memset(&hw, 0, sizeof(hw));
1051                         ide_init_hwif_ports(&hw, (unsigned long) args[0],
1052                                             (unsigned long) args[1], NULL);
1053                         hw.irq = args[2];
1054                         if (ide_register_hw(&hw, 0, NULL) == -1)
1055                                 return -EIO;
1056                         return 0;
1057                 }
1058                 case HDIO_UNREGISTER_HWIF:
1059                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1060                         /* (arg > MAX_HWIFS) checked in function */
1061                         ide_unregister(arg);
1062                         return 0;
1063                 case HDIO_SET_NICE:
1064                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1065                         if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1066                                 return -EPERM;
1067                         drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1068                         drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1069                         if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1070                                 drive->dsc_overlap = 0;
1071                                 return -EPERM;
1072                         }
1073                         drive->nice1 = (arg >> IDE_NICE_1) & 1;
1074                         return 0;
1075                 case HDIO_DRIVE_RESET:
1076                 {
1077                         unsigned long flags;
1078                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1079
1080                         /*
1081                          *      Abort the current command on the
1082                          *      group if there is one, taking
1083                          *      care not to allow anything else
1084                          *      to be queued and to die on the
1085                          *      spot if we miss one somehow
1086                          */
1087
1088                         spin_lock_irqsave(&ide_lock, flags);
1089
1090                         if (HWGROUP(drive)->resetting) {
1091                                 spin_unlock_irqrestore(&ide_lock, flags);
1092                                 return -EBUSY;
1093                         }
1094
1095                         ide_abort(drive, "drive reset");
1096
1097                         BUG_ON(HWGROUP(drive)->handler);
1098
1099                         /* Ensure nothing gets queued after we
1100                            drop the lock. Reset will clear the busy */
1101
1102                         HWGROUP(drive)->busy = 1;
1103                         spin_unlock_irqrestore(&ide_lock, flags);
1104                         (void) ide_do_reset(drive);
1105
1106                         return 0;
1107                 }
1108
1109                 case HDIO_GET_BUSSTATE:
1110                         if (!capable(CAP_SYS_ADMIN))
1111                                 return -EACCES;
1112                         if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1113                                 return -EFAULT;
1114                         return 0;
1115
1116                 case HDIO_SET_BUSSTATE:
1117                         if (!capable(CAP_SYS_ADMIN))
1118                                 return -EACCES;
1119                         if (HWIF(drive)->busproc)
1120                                 return HWIF(drive)->busproc(drive, (int)arg);
1121                         return -EOPNOTSUPP;
1122                 default:
1123                         return -EINVAL;
1124         }
1125
1126 read_val:
1127         mutex_lock(&ide_setting_mtx);
1128         spin_lock_irqsave(&ide_lock, flags);
1129         err = *val;
1130         spin_unlock_irqrestore(&ide_lock, flags);
1131         mutex_unlock(&ide_setting_mtx);
1132         return err >= 0 ? put_user(err, (long __user *)arg) : err;
1133
1134 set_val:
1135         if (bdev != bdev->bd_contains)
1136                 err = -EINVAL;
1137         else {
1138                 if (!capable(CAP_SYS_ADMIN))
1139                         err = -EACCES;
1140                 else {
1141                         mutex_lock(&ide_setting_mtx);
1142                         err = setfunc(drive, arg);
1143                         mutex_unlock(&ide_setting_mtx);
1144                 }
1145         }
1146         return err;
1147 }
1148
1149 EXPORT_SYMBOL(generic_ide_ioctl);
1150
1151 /*
1152  * stridx() returns the offset of c within s,
1153  * or -1 if c is '\0' or not found within s.
1154  */
1155 static int __init stridx (const char *s, char c)
1156 {
1157         char *i = strchr(s, c);
1158         return (i && c) ? i - s : -1;
1159 }
1160
1161 /*
1162  * match_parm() does parsing for ide_setup():
1163  *
1164  * 1. the first char of s must be '='.
1165  * 2. if the remainder matches one of the supplied keywords,
1166  *     the index (1 based) of the keyword is negated and returned.
1167  * 3. if the remainder is a series of no more than max_vals numbers
1168  *     separated by commas, the numbers are saved in vals[] and a
1169  *     count of how many were saved is returned.  Base10 is assumed,
1170  *     and base16 is allowed when prefixed with "0x".
1171  * 4. otherwise, zero is returned.
1172  */
1173 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1174 {
1175         static const char *decimal = "0123456789";
1176         static const char *hex = "0123456789abcdef";
1177         int i, n;
1178
1179         if (*s++ == '=') {
1180                 /*
1181                  * Try matching against the supplied keywords,
1182                  * and return -(index+1) if we match one
1183                  */
1184                 if (keywords != NULL) {
1185                         for (i = 0; *keywords != NULL; ++i) {
1186                                 if (!strcmp(s, *keywords++))
1187                                         return -(i+1);
1188                         }
1189                 }
1190                 /*
1191                  * Look for a series of no more than "max_vals"
1192                  * numeric values separated by commas, in base10,
1193                  * or base16 when prefixed with "0x".
1194                  * Return a count of how many were found.
1195                  */
1196                 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1197                         vals[n] = i;
1198                         while ((i = stridx(decimal, *++s)) >= 0)
1199                                 vals[n] = (vals[n] * 10) + i;
1200                         if (*s == 'x' && !vals[n]) {
1201                                 while ((i = stridx(hex, *++s)) >= 0)
1202                                         vals[n] = (vals[n] * 0x10) + i;
1203                         }
1204                         if (++n == max_vals)
1205                                 break;
1206                         if (*s == ',' || *s == ';')
1207                                 ++s;
1208                 }
1209                 if (!*s)
1210                         return n;
1211         }
1212         return 0;       /* zero = nothing matched */
1213 }
1214
1215 #ifdef CONFIG_BLK_DEV_ALI14XX
1216 extern int probe_ali14xx;
1217 extern int ali14xx_init(void);
1218 #endif
1219 #ifdef CONFIG_BLK_DEV_UMC8672
1220 extern int probe_umc8672;
1221 extern int umc8672_init(void);
1222 #endif
1223 #ifdef CONFIG_BLK_DEV_DTC2278
1224 extern int probe_dtc2278;
1225 extern int dtc2278_init(void);
1226 #endif
1227 #ifdef CONFIG_BLK_DEV_HT6560B
1228 extern int probe_ht6560b;
1229 extern int ht6560b_init(void);
1230 #endif
1231 #ifdef CONFIG_BLK_DEV_QD65XX
1232 extern int probe_qd65xx;
1233 extern int qd65xx_init(void);
1234 #endif
1235
1236 static int __initdata is_chipset_set[MAX_HWIFS];
1237
1238 /*
1239  * ide_setup() gets called VERY EARLY during initialization,
1240  * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1241  *
1242  * Remember to update Documentation/ide.txt if you change something here.
1243  */
1244 static int __init ide_setup(char *s)
1245 {
1246         int i, vals[3];
1247         ide_hwif_t *hwif;
1248         ide_drive_t *drive;
1249         unsigned int hw, unit;
1250         const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1251         const char max_hwif  = '0' + (MAX_HWIFS - 1);
1252
1253
1254         if (strncmp(s,"hd",2) == 0 && s[2] == '=')      /* hd= is for hd.c   */
1255                 return 0;                               /* driver and not us */
1256
1257         if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1258                 return 0;
1259
1260         printk(KERN_INFO "ide_setup: %s", s);
1261         init_ide_data ();
1262
1263 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1264         if (!strcmp(s, "ide=doubler")) {
1265                 extern int ide_doubler;
1266
1267                 printk(" : Enabled support for IDE doublers\n");
1268                 ide_doubler = 1;
1269                 return 1;
1270         }
1271 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1272
1273         if (!strcmp(s, "ide=nodma")) {
1274                 printk(" : Prevented DMA\n");
1275                 noautodma = 1;
1276                 return 1;
1277         }
1278
1279 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1280         if (!strcmp(s, "ide=reverse")) {
1281                 ide_scan_direction = 1;
1282                 printk(" : Enabled support for IDE inverse scan order.\n");
1283                 return 1;
1284         }
1285 #endif
1286
1287 #ifdef CONFIG_BLK_DEV_IDEACPI
1288         if (!strcmp(s, "ide=noacpi")) {
1289                 //printk(" : Disable IDE ACPI support.\n");
1290                 ide_noacpi = 1;
1291                 return 1;
1292         }
1293         if (!strcmp(s, "ide=acpigtf")) {
1294                 //printk(" : Enable IDE ACPI _GTF support.\n");
1295                 ide_noacpitfs = 0;
1296                 return 1;
1297         }
1298         if (!strcmp(s, "ide=acpionboot")) {
1299                 //printk(" : Call IDE ACPI methods on boot.\n");
1300                 ide_noacpionboot = 0;
1301                 return 1;
1302         }
1303 #endif /* CONFIG_BLK_DEV_IDEACPI */
1304
1305         /*
1306          * Look for drive options:  "hdx="
1307          */
1308         if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1309                 const char *hd_words[] = {
1310                         "none", "noprobe", "nowerr", "cdrom", "minus5",
1311                         "autotune", "noautotune", "minus8", "swapdata", "bswap",
1312                         "noflush", "remap", "remap63", "scsi", NULL };
1313                 unit = s[2] - 'a';
1314                 hw   = unit / MAX_DRIVES;
1315                 unit = unit % MAX_DRIVES;
1316                 hwif = &ide_hwifs[hw];
1317                 drive = &hwif->drives[unit];
1318                 if (strncmp(s + 4, "ide-", 4) == 0) {
1319                         strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1320                         goto done;
1321                 }
1322                 switch (match_parm(&s[3], hd_words, vals, 3)) {
1323                         case -1: /* "none" */
1324                         case -2: /* "noprobe" */
1325                                 drive->noprobe = 1;
1326                                 goto done;
1327                         case -3: /* "nowerr" */
1328                                 drive->bad_wstat = BAD_R_STAT;
1329                                 hwif->noprobe = 0;
1330                                 goto done;
1331                         case -4: /* "cdrom" */
1332                                 drive->present = 1;
1333                                 drive->media = ide_cdrom;
1334                                 /* an ATAPI device ignores DRDY */
1335                                 drive->ready_stat = 0;
1336                                 hwif->noprobe = 0;
1337                                 goto done;
1338                         case -6: /* "autotune" */
1339                                 drive->autotune = IDE_TUNE_AUTO;
1340                                 goto obsolete_option;
1341                         case -7: /* "noautotune" */
1342                                 drive->autotune = IDE_TUNE_NOAUTO;
1343                                 goto obsolete_option;
1344                         case -9: /* "swapdata" */
1345                         case -10: /* "bswap" */
1346                                 drive->bswap = 1;
1347                                 goto done;
1348                         case -11: /* noflush */
1349                                 drive->noflush = 1;
1350                                 goto done;
1351                         case -12: /* "remap" */
1352                                 drive->remap_0_to_1 = 1;
1353                                 goto done;
1354                         case -13: /* "remap63" */
1355                                 drive->sect0 = 63;
1356                                 goto done;
1357                         case -14: /* "scsi" */
1358                                 drive->scsi = 1;
1359                                 goto done;
1360                         case 3: /* cyl,head,sect */
1361                                 drive->media    = ide_disk;
1362                                 drive->ready_stat = READY_STAT;
1363                                 drive->cyl      = drive->bios_cyl  = vals[0];
1364                                 drive->head     = drive->bios_head = vals[1];
1365                                 drive->sect     = drive->bios_sect = vals[2];
1366                                 drive->present  = 1;
1367                                 drive->forced_geom = 1;
1368                                 hwif->noprobe = 0;
1369                                 goto done;
1370                         default:
1371                                 goto bad_option;
1372                 }
1373         }
1374
1375         if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1376                 goto bad_option;
1377         /*
1378          * Look for bus speed option:  "idebus="
1379          */
1380         if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1381                 if (match_parm(&s[6], NULL, vals, 1) != 1)
1382                         goto bad_option;
1383                 if (vals[0] >= 20 && vals[0] <= 66) {
1384                         idebus_parameter = vals[0];
1385                 } else
1386                         printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1387                 goto done;
1388         }
1389         /*
1390          * Look for interface options:  "idex="
1391          */
1392         if (s[3] >= '0' && s[3] <= max_hwif) {
1393                 /*
1394                  * Be VERY CAREFUL changing this: note hardcoded indexes below
1395                  * (-8, -9, -10) are reserved to ease the hardcoding.
1396                  */
1397                 static const char *ide_words[] = {
1398                         "noprobe", "serialize", "minus3", "minus4",
1399                         "reset", "dma", "ata66", "minus8", "minus9",
1400                         "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1401                         "dtc2278", "umc8672", "ali14xx", NULL };
1402                 hw = s[3] - '0';
1403                 hwif = &ide_hwifs[hw];
1404                 i = match_parm(&s[4], ide_words, vals, 3);
1405
1406                 /*
1407                  * Cryptic check to ensure chipset not already set for hwif.
1408                  * Note: we can't depend on hwif->chipset here.
1409                  */
1410                 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1411                         /* chipset already specified */
1412                         if (is_chipset_set[hw])
1413                                 goto bad_option;
1414                         if (i > -18 && i <= -11) {
1415                                 /* these drivers are for "ide0=" only */
1416                                 if (hw != 0)
1417                                         goto bad_hwif;
1418                                 /* chipset already specified for 2nd port */
1419                                 if (is_chipset_set[hw+1])
1420                                         goto bad_option;
1421                         }
1422                         is_chipset_set[hw] = 1;
1423                         printk("\n");
1424                 }
1425
1426                 switch (i) {
1427 #ifdef CONFIG_BLK_DEV_ALI14XX
1428                         case -17: /* "ali14xx" */
1429                                 probe_ali14xx = 1;
1430                                 goto done;
1431 #endif
1432 #ifdef CONFIG_BLK_DEV_UMC8672
1433                         case -16: /* "umc8672" */
1434                                 probe_umc8672 = 1;
1435                                 goto done;
1436 #endif
1437 #ifdef CONFIG_BLK_DEV_DTC2278
1438                         case -15: /* "dtc2278" */
1439                                 probe_dtc2278 = 1;
1440                                 goto done;
1441 #endif
1442 #ifdef CONFIG_BLK_DEV_CMD640
1443                         case -14: /* "cmd640_vlb" */
1444                         {
1445                                 extern int cmd640_vlb; /* flag for cmd640.c */
1446                                 cmd640_vlb = 1;
1447                                 goto done;
1448                         }
1449 #endif
1450 #ifdef CONFIG_BLK_DEV_HT6560B
1451                         case -13: /* "ht6560b" */
1452                                 probe_ht6560b = 1;
1453                                 goto done;
1454 #endif
1455 #ifdef CONFIG_BLK_DEV_QD65XX
1456                         case -12: /* "qd65xx" */
1457                                 probe_qd65xx = 1;
1458                                 goto done;
1459 #endif
1460 #ifdef CONFIG_BLK_DEV_4DRIVES
1461                         case -11: /* "four" drives on one set of ports */
1462                         {
1463                                 ide_hwif_t *mate = &ide_hwifs[hw^1];
1464                                 mate->drives[0].select.all ^= 0x20;
1465                                 mate->drives[1].select.all ^= 0x20;
1466                                 hwif->chipset = mate->chipset = ide_4drives;
1467                                 mate->irq = hwif->irq;
1468                                 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1469                                 hwif->mate = mate;
1470                                 mate->mate = hwif;
1471                                 hwif->serialized = mate->serialized = 1;
1472                                 goto obsolete_option;
1473                         }
1474 #endif /* CONFIG_BLK_DEV_4DRIVES */
1475                         case -10: /* minus10 */
1476                         case -9: /* minus9 */
1477                         case -8: /* minus8 */
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 -6: /* dma */
1493                                 hwif->autodma = 1;
1494                                 goto obsolete_option;
1495                         case -5: /* "reset" */
1496                                 hwif->reset = 1;
1497                                 goto obsolete_option;
1498                         case -2: /* "serialize" */
1499                                 hwif->mate = &ide_hwifs[hw^1];
1500                                 hwif->mate->mate = hwif;
1501                                 hwif->serialized = hwif->mate->serialized = 1;
1502                                 goto obsolete_option;
1503
1504                         case -1: /* "noprobe" */
1505                                 hwif->noprobe = 1;
1506                                 goto done;
1507
1508                         case 1: /* base */
1509                                 vals[1] = vals[0] + 0x206; /* default ctl */
1510                         case 2: /* base,ctl */
1511                                 vals[2] = 0;    /* default irq = probe for it */
1512                         case 3: /* base,ctl,irq */
1513                                 hwif->hw.irq = vals[2];
1514                                 ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq);
1515                                 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
1516                                 hwif->irq      = vals[2];
1517                                 hwif->noprobe  = 0;
1518                                 hwif->chipset  = ide_forced;
1519                                 goto obsolete_option;
1520
1521                         case 0: goto bad_option;
1522                         default:
1523                                 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1524                                 return 1;
1525                 }
1526         }
1527 bad_option:
1528         printk(" -- BAD OPTION\n");
1529         return 1;
1530 obsolete_option:
1531         printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1532         return 1;
1533 bad_hwif:
1534         printk("-- NOT SUPPORTED ON ide%d", hw);
1535 done:
1536         printk("\n");
1537         return 1;
1538 }
1539
1540 extern void __init pnpide_init(void);
1541 extern void __exit pnpide_exit(void);
1542 extern void __init h8300_ide_init(void);
1543
1544 /*
1545  * probe_for_hwifs() finds/initializes "known" IDE interfaces
1546  */
1547 static void __init probe_for_hwifs (void)
1548 {
1549 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1550         ide_scan_pcibus(ide_scan_direction);
1551 #endif
1552
1553 #ifdef CONFIG_ETRAX_IDE
1554         {
1555                 extern void init_e100_ide(void);
1556                 init_e100_ide();
1557         }
1558 #endif /* CONFIG_ETRAX_IDE */
1559 #ifdef CONFIG_BLK_DEV_CMD640
1560         {
1561                 extern void ide_probe_for_cmd640x(void);
1562                 ide_probe_for_cmd640x();
1563         }
1564 #endif /* CONFIG_BLK_DEV_CMD640 */
1565 #ifdef CONFIG_BLK_DEV_IDE_PMAC
1566         {
1567                 extern int pmac_ide_probe(void);
1568                 (void)pmac_ide_probe();
1569         }
1570 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
1571 #ifdef CONFIG_BLK_DEV_GAYLE
1572         {
1573                 extern void gayle_init(void);
1574                 gayle_init();
1575         }
1576 #endif /* CONFIG_BLK_DEV_GAYLE */
1577 #ifdef CONFIG_BLK_DEV_FALCON_IDE
1578         {
1579                 extern void falconide_init(void);
1580                 falconide_init();
1581         }
1582 #endif /* CONFIG_BLK_DEV_FALCON_IDE */
1583 #ifdef CONFIG_BLK_DEV_MAC_IDE
1584         {
1585                 extern void macide_init(void);
1586                 macide_init();
1587         }
1588 #endif /* CONFIG_BLK_DEV_MAC_IDE */
1589 #ifdef CONFIG_BLK_DEV_Q40IDE
1590         {
1591                 extern void q40ide_init(void);
1592                 q40ide_init();
1593         }
1594 #endif /* CONFIG_BLK_DEV_Q40IDE */
1595 #ifdef CONFIG_BLK_DEV_BUDDHA
1596         {
1597                 extern void buddha_init(void);
1598                 buddha_init();
1599         }
1600 #endif /* CONFIG_BLK_DEV_BUDDHA */
1601 #ifdef CONFIG_BLK_DEV_IDEPNP
1602         pnpide_init();
1603 #endif
1604 #ifdef CONFIG_H8300
1605         h8300_ide_init();
1606 #endif
1607 }
1608
1609 /*
1610  * Probe module
1611  */
1612
1613 EXPORT_SYMBOL(ide_lock);
1614
1615 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1616 {
1617         return 1;
1618 }
1619
1620 static char *media_string(ide_drive_t *drive)
1621 {
1622         switch (drive->media) {
1623         case ide_disk:
1624                 return "disk";
1625         case ide_cdrom:
1626                 return "cdrom";
1627         case ide_tape:
1628                 return "tape";
1629         case ide_floppy:
1630                 return "floppy";
1631         case ide_optical:
1632                 return "optical";
1633         default:
1634                 return "UNKNOWN";
1635         }
1636 }
1637
1638 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1639 {
1640         ide_drive_t *drive = to_ide_device(dev);
1641         return sprintf(buf, "%s\n", media_string(drive));
1642 }
1643
1644 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1645 {
1646         ide_drive_t *drive = to_ide_device(dev);
1647         return sprintf(buf, "%s\n", drive->name);
1648 }
1649
1650 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1651 {
1652         ide_drive_t *drive = to_ide_device(dev);
1653         return sprintf(buf, "ide:m-%s\n", media_string(drive));
1654 }
1655
1656 static struct device_attribute ide_dev_attrs[] = {
1657         __ATTR_RO(media),
1658         __ATTR_RO(drivename),
1659         __ATTR_RO(modalias),
1660         __ATTR_NULL
1661 };
1662
1663 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
1664 {
1665         ide_drive_t *drive = to_ide_device(dev);
1666
1667         add_uevent_var(env, "MEDIA=%s", media_string(drive));
1668         add_uevent_var(env, "DRIVENAME=%s", drive->name);
1669         add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
1670         return 0;
1671 }
1672
1673 static int generic_ide_probe(struct device *dev)
1674 {
1675         ide_drive_t *drive = to_ide_device(dev);
1676         ide_driver_t *drv = to_ide_driver(dev->driver);
1677
1678         return drv->probe ? drv->probe(drive) : -ENODEV;
1679 }
1680
1681 static int generic_ide_remove(struct device *dev)
1682 {
1683         ide_drive_t *drive = to_ide_device(dev);
1684         ide_driver_t *drv = to_ide_driver(dev->driver);
1685
1686         if (drv->remove)
1687                 drv->remove(drive);
1688
1689         return 0;
1690 }
1691
1692 static void generic_ide_shutdown(struct device *dev)
1693 {
1694         ide_drive_t *drive = to_ide_device(dev);
1695         ide_driver_t *drv = to_ide_driver(dev->driver);
1696
1697         if (dev->driver && drv->shutdown)
1698                 drv->shutdown(drive);
1699 }
1700
1701 struct bus_type ide_bus_type = {
1702         .name           = "ide",
1703         .match          = ide_bus_match,
1704         .uevent         = ide_uevent,
1705         .probe          = generic_ide_probe,
1706         .remove         = generic_ide_remove,
1707         .shutdown       = generic_ide_shutdown,
1708         .dev_attrs      = ide_dev_attrs,
1709         .suspend        = generic_ide_suspend,
1710         .resume         = generic_ide_resume,
1711 };
1712
1713 EXPORT_SYMBOL_GPL(ide_bus_type);
1714
1715 /*
1716  * This is gets invoked once during initialization, to set *everything* up
1717  */
1718 static int __init ide_init(void)
1719 {
1720         int ret;
1721
1722         printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
1723         system_bus_speed = ide_system_bus_speed();
1724
1725         ret = bus_register(&ide_bus_type);
1726         if (ret < 0) {
1727                 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1728                 return ret;
1729         }
1730
1731         init_ide_data();
1732
1733         proc_ide_create();
1734
1735 #ifdef CONFIG_BLK_DEV_ALI14XX
1736         if (probe_ali14xx)
1737                 (void)ali14xx_init();
1738 #endif
1739 #ifdef CONFIG_BLK_DEV_UMC8672
1740         if (probe_umc8672)
1741                 (void)umc8672_init();
1742 #endif
1743 #ifdef CONFIG_BLK_DEV_DTC2278
1744         if (probe_dtc2278)
1745                 (void)dtc2278_init();
1746 #endif
1747 #ifdef CONFIG_BLK_DEV_HT6560B
1748         if (probe_ht6560b)
1749                 (void)ht6560b_init();
1750 #endif
1751 #ifdef CONFIG_BLK_DEV_QD65XX
1752         if (probe_qd65xx)
1753                 (void)qd65xx_init();
1754 #endif
1755
1756         /* Probe for special PCI and other "known" interface chipsets. */
1757         probe_for_hwifs();
1758
1759         return 0;
1760 }
1761
1762 #ifdef MODULE
1763 static char *options = NULL;
1764 module_param(options, charp, 0);
1765 MODULE_LICENSE("GPL");
1766
1767 static void __init parse_options (char *line)
1768 {
1769         char *next = line;
1770
1771         if (line == NULL || !*line)
1772                 return;
1773         while ((line = next) != NULL) {
1774                 if ((next = strchr(line,' ')) != NULL)
1775                         *next++ = 0;
1776                 if (!ide_setup(line))
1777                         printk (KERN_INFO "Unknown option '%s'\n", line);
1778         }
1779 }
1780
1781 int __init init_module (void)
1782 {
1783         parse_options(options);
1784         return ide_init();
1785 }
1786
1787 void __exit cleanup_module (void)
1788 {
1789         int index;
1790
1791         for (index = 0; index < MAX_HWIFS; ++index)
1792                 ide_unregister(index);
1793
1794 #ifdef CONFIG_BLK_DEV_IDEPNP
1795         pnpide_exit();
1796 #endif
1797
1798         proc_ide_destroy();
1799
1800         bus_unregister(&ide_bus_type);
1801 }
1802
1803 #else /* !MODULE */
1804
1805 __setup("", ide_setup);
1806
1807 module_init(ide_init);
1808
1809 #endif /* MODULE */