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   1 /*
   2  *  linux/drivers/ide/ide.c             Version 7.00beta2       Mar 05 2003
   3  *
   4  *  Copyright (C) 1994-1998  Linus Torvalds & authors (see below)
   5  */
   6
   7 /*
   8  *  Mostly written by Mark Lord  <mlord@pobox.com>
   9  *                and Gadi Oxman <gadio@netvision.net.il>
  10  *                and Andre Hedrick <andre@linux-ide.org>
  11  *
  12  *  See linux/MAINTAINERS for address of current maintainer.
  13  *
  14  * This is the multiple IDE interface driver, as evolved from hd.c.
  15  * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs
  16  *   (usually 14 & 15).
  17  * There can be up to two drives per interface, as per the ATA-2 spec.
  18  *
  19  * ...
  20  *
  21  *  From hd.c:
  22  *  |
  23  *  | It traverses the request-list, using interrupts to jump between functions.
  24  *  | As nearly all functions can be called within interrupts, we may not sleep.
  25  *  | Special care is recommended.  Have Fun!
  26  *  |
  27  *  | modified by Drew Eckhardt to check nr of hd's from the CMOS.
  28  *  |
  29  *  | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
  30  *  | in the early extended-partition checks and added DM partitions.
  31  *  |
  32  *  | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
  33  *  |
  34  *  | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
  35  *  | and general streamlining by Mark Lord (mlord@pobox.com).
  36  *
  37  *  October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
  38  *
  39  *      Mark Lord       (mlord@pobox.com)               (IDE Perf.Pkg)
  40  *      Delman Lee      (delman@ieee.org)               ("Mr. atdisk2")
  41  *      Scott Snyder    (snyder@fnald0.fnal.gov)        (ATAPI IDE cd-rom)
  42  *
  43  *  This was a rewrite of just about everything from hd.c, though some original
  44  *  code is still sprinkled about.  Think of it as a major evolution, with
  45  *  inspiration from lots of linux users, esp.  hamish@zot.apana.org.au
  46  */
  47
  48 #define REVISION        "Revision: 7.00alpha2"
  49 #define VERSION         "Id: ide.c 7.00a2 20020906"
  50
  51 #define _IDE_C                  /* Tell ide.h it's really us */
  52
  53 #include <linux/module.h>
  54 #include <linux/types.h>
  55 #include <linux/string.h>
  56 #include <linux/kernel.h>
  57 #include <linux/timer.h>
  58 #include <linux/mm.h>
  59 #include <linux/interrupt.h>
  60 #include <linux/major.h>
  61 #include <linux/errno.h>
  62 #include <linux/genhd.h>
  63 #include <linux/blkpg.h>
  64 #include <linux/slab.h>
  65 #include <linux/init.h>
  66 #include <linux/pci.h>
  67 #include <linux/delay.h>
  68 #include <linux/ide.h>
  69 #include <linux/completion.h>
  70 #include <linux/reboot.h>
  71 #include <linux/cdrom.h>
  72 #include <linux/seq_file.h>
  73 #include <linux/device.h>
  74 #include <linux/bitops.h>
  75
  76 #include <asm/byteorder.h>
  77 #include <asm/irq.h>
  78 #include <asm/uaccess.h>
  79 #include <asm/io.h>
  80
  81
  82 /* default maximum number of failures */
  83 #define IDE_DEFAULT_MAX_FAILURES        1
  84
  85 static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
  86                                         IDE2_MAJOR, IDE3_MAJOR,
  87                                         IDE4_MAJOR, IDE5_MAJOR,
  88                                         IDE6_MAJOR, IDE7_MAJOR,
  89                                         IDE8_MAJOR, IDE9_MAJOR };
  90
  91 static int idebus_parameter;    /* holds the "idebus=" parameter */
  92 static int system_bus_speed;    /* holds what we think is VESA/PCI bus speed */
  93
  94 DEFINE_MUTEX(ide_cfg_mtx);
  95  __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
  96
  97 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
  98 static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
  99 #endif
 100
 101 int noautodma = 0;
 102
 103 #ifdef CONFIG_BLK_DEV_IDEACPI
 104 int ide_noacpi = 0;
 105 int ide_noacpitfs = 1;
 106 int ide_noacpionboot = 1;
 107 #endif
 108
 109 /*
 110  * This is declared extern in ide.h, for access by other IDE modules:
 111  */
 112 ide_hwif_t ide_hwifs[MAX_HWIFS];        /* master data repository */
 113
 114 EXPORT_SYMBOL(ide_hwifs);
 115
 116 /*
 117  * Do not even *think* about calling this!
 118  */
 119 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
 462         hwif->hwif_data                 = tmp_hwif->hwif_data;
 463 }
 464
 465 /**
 466  *      ide_unregister          -       free an IDE interface
 467  *      @index: index of interface (will change soon to a pointer)
 468  *
 469  *      Perform the final unregister of an IDE interface. At the moment
 470  *      we don't refcount interfaces so this will also get split up.
 471  *
 472  *      Locking:
 473  *      The caller must not hold the IDE locks
 474  *      The drive present/vanishing is not yet properly locked
 475  *      Take care with the callbacks. These have been split to avoid
 476  *      deadlocking the IDE layer. The shutdown callback is called
 477  *      before we take the lock and free resources. It is up to the
 478  *      caller to be sure there is no pending I/O here, and that
 479  *      the interface will not be reopened (present/vanishing locking
 480  *      isn't yet done BTW). After we commit to the final kill we
 481  *      call the cleanup callback with the ide locks held.
 482  *
 483  *      Unregister restores the hwif structures to the default state.
 484  *      This is raving bonkers.
 485  */
 486
 487 void ide_unregister(unsigned int index)
 488 {
 489         ide_drive_t *drive;
 490         ide_hwif_t *hwif, *g;
 491         static ide_hwif_t tmp_hwif; /* protected by ide_cfg_mtx */
 492         ide_hwgroup_t *hwgroup;
 493         int irq_count = 0, unit;
 494
 495         BUG_ON(index >= MAX_HWIFS);
 496
 497         BUG_ON(in_interrupt());
 498         BUG_ON(irqs_disabled());
 499         mutex_lock(&ide_cfg_mtx);
 500         spin_lock_irq(&ide_lock);
 501         hwif = &ide_hwifs[index];
 502         if (!hwif->present)
 503                 goto abort;
 504         for (unit = 0; unit < MAX_DRIVES; ++unit) {
 505                 drive = &hwif->drives[unit];
 506                 if (!drive->present)
 507                         continue;
 508                 spin_unlock_irq(&ide_lock);
 509                 device_unregister(&drive->gendev);
 510                 wait_for_completion(&drive->gendev_rel_comp);
 511                 spin_lock_irq(&ide_lock);
 512         }
 513         hwif->present = 0;
 514
 515         spin_unlock_irq(&ide_lock);
 516
 517         ide_proc_unregister_port(hwif);
 518
 519         hwgroup = hwif->hwgroup;
 520         /*
 521          * free the irq if we were the only hwif using it
 522          */
 523         g = hwgroup->hwif;
 524         do {
 525                 if (g->irq == hwif->irq)
 526                         ++irq_count;
 527                 g = g->next;
 528         } while (g != hwgroup->hwif);
 529         if (irq_count == 1)
 530                 free_irq(hwif->irq, hwgroup);
 531
 532         spin_lock_irq(&ide_lock);
 533         /*
 534          * Note that we only release the standard ports,
 535          * and do not even try to handle any extra ports
 536          * allocated for weird IDE interface chipsets.
 537          */
 538         ide_hwif_release_regions(hwif);
 539
 540         /*
 541          * Remove us from the hwgroup, and free
 542          * the hwgroup if we were the only member
 543          */
 544         if (hwif->next == hwif) {
 545                 BUG_ON(hwgroup->hwif != hwif);
 546                 kfree(hwgroup);
 547         } else {
 548                 /* There is another interface in hwgroup.
 549                  * Unlink us, and set hwgroup->drive and ->hwif to
 550                  * something sane.
 551                  */
 552                 g = hwgroup->hwif;
 553                 while (g->next != hwif)
 554                         g = g->next;
 555                 g->next = hwif->next;
 556                 if (hwgroup->hwif == hwif) {
 557                         /* Chose a random hwif for hwgroup->hwif.
 558                          * It's guaranteed that there are no drives
 559                          * left in the hwgroup.
 560                          */
 561                         BUG_ON(hwgroup->drive != NULL);
 562                         hwgroup->hwif = g;
 563                 }
 564                 BUG_ON(hwgroup->hwif == hwif);
 565         }
 566
 567         /* More messed up locking ... */
 568         spin_unlock_irq(&ide_lock);
 569         device_unregister(&hwif->gendev);
 570         wait_for_completion(&hwif->gendev_rel_comp);
 571
 572         /*
 573          * Remove us from the kernel's knowledge
 574          */
 575         blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
 576         kfree(hwif->sg_table);
 577         unregister_blkdev(hwif->major, hwif->name);
 578         spin_lock_irq(&ide_lock);
 579
 580         if (hwif->dma_base) {
 581                 (void) ide_release_dma(hwif);
 582
 583                 hwif->dma_base = 0;
 584                 hwif->dma_master = 0;
 585                 hwif->dma_command = 0;
 586                 hwif->dma_vendor1 = 0;
 587                 hwif->dma_status = 0;
 588                 hwif->dma_vendor3 = 0;
 589                 hwif->dma_prdtable = 0;
 590
 591                 hwif->extra_base  = 0;
 592                 hwif->extra_ports = 0;
 593         }
 594
 595         /* copy original settings */
 596         tmp_hwif = *hwif;
 597
 598         /* restore hwif data to pristine status */
 599         init_hwif_data(hwif, index);
 600         init_hwif_default(hwif, index);
 601
 602         ide_hwif_restore(hwif, &tmp_hwif);
 603
 604 abort:
 605         spin_unlock_irq(&ide_lock);
 606         mutex_unlock(&ide_cfg_mtx);
 607 }
 608
 609 EXPORT_SYMBOL(ide_unregister);
 610
 611
 612 /**
 613  *      ide_setup_ports         -       set up IDE interface ports
 614  *      @hw: register descriptions
 615  *      @base: base register
 616  *      @offsets: table of register offsets
 617  *      @ctrl: control register
 618  *      @ack_irq: IRQ ack
 619  *      @irq: interrupt lie
 620  *
 621  *      Setup hw_regs_t structure described by parameters.  You
 622  *      may set up the hw structure yourself OR use this routine to
 623  *      do it for you. This is basically a helper
 624  *
 625  */
 626
 627 void ide_setup_ports (  hw_regs_t *hw,
 628                         unsigned long base, int *offsets,
 629                         unsigned long ctrl, unsigned long intr,
 630                         ide_ack_intr_t *ack_intr,
 631 /*
 632  *                      ide_io_ops_t *iops,
 633  */
 634                         int irq)
 635 {
 636         int i;
 637
 638         memset(hw, 0, sizeof(hw_regs_t));
 639         for (i = 0; i < IDE_NR_PORTS; i++) {
 640                 if (offsets[i] == -1) {
 641                         switch(i) {
 642                                 case IDE_CONTROL_OFFSET:
 643                                         hw->io_ports[i] = ctrl;
 644                                         break;
 645 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
 646                                 case IDE_IRQ_OFFSET:
 647                                         hw->io_ports[i] = intr;
 648                                         break;
 649 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
 650                                 default:
 651                                         hw->io_ports[i] = 0;
 652                                         break;
 653                         }
 654                 } else {
 655                         hw->io_ports[i] = base + offsets[i];
 656                 }
 657         }
 658         hw->irq = irq;
 659         hw->dma = NO_DMA;
 660         hw->ack_intr = ack_intr;
 661 /*
 662  *      hw->iops = iops;
 663  */
 664 }
 665
 666 /**
 667  *      ide_register_hw_with_fixup      -       register IDE interface
 668  *      @hw: hardware registers
 669  *      @initializing: set while initializing built-in drivers
 670  *      @hwifp: pointer to returned hwif
 671  *      @fixup: fixup function
 672  *
 673  *      Register an IDE interface, specifying exactly the registers etc.
 674  *      Set init=1 iff calling before probes have taken place.
 675  *
 676  *      Returns -1 on error.
 677  */
 678
 679 int ide_register_hw_with_fixup(hw_regs_t *hw, int initializing,
 680                                ide_hwif_t **hwifp,
 681                                void(*fixup)(ide_hwif_t *hwif))
 682 {
 683         int index, retry = 1;
 684         ide_hwif_t *hwif;
 685
 686         do {
 687                 for (index = 0; index < MAX_HWIFS; ++index) {
 688                         hwif = &ide_hwifs[index];
 689                         if (hwif->hw.io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
 690                                 goto found;
 691                 }
 692                 for (index = 0; index < MAX_HWIFS; ++index) {
 693                         hwif = &ide_hwifs[index];
 694                         if (hwif->hold)
 695                                 continue;
 696                         if ((!hwif->present && !hwif->mate && !initializing) ||
 697                             (!hwif->hw.io_ports[IDE_DATA_OFFSET] && initializing))
 698                                 goto found;
 699                 }
 700                 for (index = 0; index < MAX_HWIFS; index++)
 701                         ide_unregister(index);
 702         } while (retry--);
 703         return -1;
 704 found:
 705         if (hwif->present)
 706                 ide_unregister(index);
 707         else if (!hwif->hold) {
 708                 init_hwif_data(hwif, index);
 709                 init_hwif_default(hwif, index);
 710         }
 711         if (hwif->present)
 712                 return -1;
 713         memcpy(&hwif->hw, hw, sizeof(*hw));
 714         memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports));
 715         hwif->irq = hw->irq;
 716         hwif->noprobe = 0;
 717         hwif->chipset = hw->chipset;
 718         hwif->gendev.parent = hw->dev;
 719
 720         if (!initializing) {
 721                 probe_hwif_init_with_fixup(hwif, fixup);
 722                 ide_proc_register_port(hwif);
 723         }
 724
 725         if (hwifp)
 726                 *hwifp = hwif;
 727
 728         return (initializing || hwif->present) ? index : -1;
 729 }
 730
 731 EXPORT_SYMBOL(ide_register_hw_with_fixup);
 732
 733 int ide_register_hw(hw_regs_t *hw, int initializing, ide_hwif_t **hwifp)
 734 {
 735         return ide_register_hw_with_fixup(hw, initializing, hwifp, NULL);
 736 }
 737
 738 EXPORT_SYMBOL(ide_register_hw);
 739
 740 /*
 741  *      Locks for IDE setting functionality
 742  */
 743
 744 DEFINE_MUTEX(ide_setting_mtx);
 745
 746 EXPORT_SYMBOL_GPL(ide_setting_mtx);
 747
 748 /**
 749  *      ide_spin_wait_hwgroup   -       wait for group
 750  *      @drive: drive in the group
 751  *
 752  *      Wait for an IDE device group to go non busy and then return
 753  *      holding the ide_lock which guards the hwgroup->busy status
 754  *      and right to use it.
 755  */
 756
 757 int ide_spin_wait_hwgroup (ide_drive_t *drive)
 758 {
 759         ide_hwgroup_t *hwgroup = HWGROUP(drive);
 760         unsigned long timeout = jiffies + (3 * HZ);
 761
 762         spin_lock_irq(&ide_lock);
 763
 764         while (hwgroup->busy) {
 765                 unsigned long lflags;
 766                 spin_unlock_irq(&ide_lock);
 767                 local_irq_set(lflags);
 768                 if (time_after(jiffies, timeout)) {
 769                         local_irq_restore(lflags);
 770                         printk(KERN_ERR "%s: channel busy\n", drive->name);
 771                         return -EBUSY;
 772                 }
 773                 local_irq_restore(lflags);
 774                 spin_lock_irq(&ide_lock);
 775         }
 776         return 0;
 777 }
 778
 779 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
 780
 781 int set_io_32bit(ide_drive_t *drive, int arg)
 782 {
 783         if (drive->no_io_32bit)
 784                 return -EPERM;
 785
 786         if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
 787                 return -EINVAL;
 788
 789         drive->io_32bit = arg;
 790 #ifdef CONFIG_BLK_DEV_DTC2278
 791         if (HWIF(drive)->chipset == ide_dtc2278)
 792                 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
 793 #endif /* CONFIG_BLK_DEV_DTC2278 */
 794         return 0;
 795 }
 796
 797 static int set_ksettings(ide_drive_t *drive, int arg)
 798 {
 799         if (arg < 0 || arg > 1)
 800                 return -EINVAL;
 801
 802         if (ide_spin_wait_hwgroup(drive))
 803                 return -EBUSY;
 804         drive->keep_settings = arg;
 805         spin_unlock_irq(&ide_lock);
 806
 807         return 0;
 808 }
 809
 810 int set_using_dma(ide_drive_t *drive, int arg)
 811 {
 812 #ifdef CONFIG_BLK_DEV_IDEDMA
 813         ide_hwif_t *hwif = drive->hwif;
 814         int err = -EPERM;
 815
 816         if (arg < 0 || arg > 1)
 817                 return -EINVAL;
 818
 819         if (!drive->id || !(drive->id->capability & 1))
 820                 goto out;
 821
 822         if (hwif->ide_dma_on == NULL)
 823                 goto out;
 824
 825         err = -EBUSY;
 826         if (ide_spin_wait_hwgroup(drive))
 827                 goto out;
 828         /*
 829          * set ->busy flag, unlock and let it ride
 830          */
 831         hwif->hwgroup->busy = 1;
 832         spin_unlock_irq(&ide_lock);
 833
 834         err = 0;
 835
 836         if (arg) {
 837                 hwif->dma_off_quietly(drive);
 838                 if (ide_set_dma(drive) || hwif->ide_dma_on(drive))
 839                         err = -EIO;
 840         } else
 841                 ide_dma_off(drive);
 842
 843         /*
 844          * lock, clear ->busy flag and unlock before leaving
 845          */
 846         spin_lock_irq(&ide_lock);
 847         hwif->hwgroup->busy = 0;
 848         spin_unlock_irq(&ide_lock);
 849 out:
 850         return err;
 851 #else
 852         if (arg < 0 || arg > 1)
 853                 return -EINVAL;
 854
 855         return -EPERM;
 856 #endif
 857 }
 858
 859 int set_pio_mode(ide_drive_t *drive, int arg)
 860 {
 861         struct request rq;
 862
 863         if (arg < 0 || arg > 255)
 864                 return -EINVAL;
 865
 866         if (drive->hwif->set_pio_mode == NULL)
 867                 return -ENOSYS;
 868
 869         if (drive->special.b.set_tune)
 870                 return -EBUSY;
 871         ide_init_drive_cmd(&rq);
 872         drive->tune_req = (u8) arg;
 873         drive->special.b.set_tune = 1;
 874         (void) ide_do_drive_cmd(drive, &rq, ide_wait);
 875         return 0;
 876 }
 877
 878 static int set_unmaskirq(ide_drive_t *drive, int arg)
 879 {
 880         if (drive->no_unmask)
 881                 return -EPERM;
 882
 883         if (arg < 0 || arg > 1)
 884                 return -EINVAL;
 885
 886         if (ide_spin_wait_hwgroup(drive))
 887                 return -EBUSY;
 888         drive->unmask = arg;
 889         spin_unlock_irq(&ide_lock);
 890
 891         return 0;
 892 }
 893
 894 /**
 895  *      system_bus_clock        -       clock guess
 896  *
 897  *      External version of the bus clock guess used by very old IDE drivers
 898  *      for things like VLB timings. Should not be used.
 899  */
 900
 901 int system_bus_clock (void)
 902 {
 903         return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
 904 }
 905
 906 EXPORT_SYMBOL(system_bus_clock);
 907
 908 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
 909 {
 910         ide_drive_t *drive = dev->driver_data;
 911         ide_hwif_t *hwif = HWIF(drive);
 912         struct request rq;
 913         struct request_pm_state rqpm;
 914         ide_task_t args;
 915         int ret;
 916
 917         /* Call ACPI _GTM only once */
 918         if (!(drive->dn % 2))
 919                 ide_acpi_get_timing(hwif);
 920
 921         memset(&rq, 0, sizeof(rq));
 922         memset(&rqpm, 0, sizeof(rqpm));
 923         memset(&args, 0, sizeof(args));
 924         rq.cmd_type = REQ_TYPE_PM_SUSPEND;
 925         rq.special = &args;
 926         rq.data = &rqpm;
 927         rqpm.pm_step = ide_pm_state_start_suspend;
 928         if (mesg.event == PM_EVENT_PRETHAW)
 929                 mesg.event = PM_EVENT_FREEZE;
 930         rqpm.pm_state = mesg.event;
 931
 932         ret = ide_do_drive_cmd(drive, &rq, ide_wait);
 933         /* only call ACPI _PS3 after both drivers are suspended */
 934         if (!ret && (((drive->dn % 2) && hwif->drives[0].present
 935                  && hwif->drives[1].present)
 936                  || !hwif->drives[0].present
 937                  || !hwif->drives[1].present))
 938                 ide_acpi_set_state(hwif, 0);
 939         return ret;
 940 }
 941
 942 static int generic_ide_resume(struct device *dev)
 943 {
 944         ide_drive_t *drive = dev->driver_data;
 945         ide_hwif_t *hwif = HWIF(drive);
 946         struct request rq;
 947         struct request_pm_state rqpm;
 948         ide_task_t args;
 949         int err;
 950
 951         /* Call ACPI _STM only once */
 952         if (!(drive->dn % 2)) {
 953                 ide_acpi_set_state(hwif, 1);
 954                 ide_acpi_push_timing(hwif);
 955         }
 956
 957         ide_acpi_exec_tfs(drive);
 958
 959         memset(&rq, 0, sizeof(rq));
 960         memset(&rqpm, 0, sizeof(rqpm));
 961         memset(&args, 0, sizeof(args));
 962         rq.cmd_type = REQ_TYPE_PM_RESUME;
 963         rq.special = &args;
 964         rq.data = &rqpm;
 965         rqpm.pm_step = ide_pm_state_start_resume;
 966         rqpm.pm_state = PM_EVENT_ON;
 967
 968         err = ide_do_drive_cmd(drive, &rq, ide_head_wait);
 969
 970         if (err == 0 && dev->driver) {
 971                 ide_driver_t *drv = to_ide_driver(dev->driver);
 972
 973                 if (drv->resume)
 974                         drv->resume(drive);
 975         }
 976
 977         return err;
 978 }
 979
 980 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
 981                         unsigned int cmd, unsigned long arg)
 982 {
 983         unsigned long flags;
 984         ide_driver_t *drv;
 985         void __user *p = (void __user *)arg;
 986         int err = 0, (*setfunc)(ide_drive_t *, int);
 987         u8 *val;
 988
 989         switch (cmd) {
 990         case HDIO_GET_32BIT:        val = &drive->io_32bit;      goto read_val;
 991         case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
 992         case HDIO_GET_UNMASKINTR:   val = &drive->unmask;        goto read_val;
 993         case HDIO_GET_DMA:          val = &drive->using_dma;     goto read_val;
 994         case HDIO_SET_32BIT:        setfunc = set_io_32bit;      goto set_val;
 995         case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings;     goto set_val;
 996         case HDIO_SET_PIO_MODE:     setfunc = set_pio_mode;      goto set_val;
 997         case HDIO_SET_UNMASKINTR:   setfunc = set_unmaskirq;     goto set_val;
 998         case HDIO_SET_DMA:          setfunc = set_using_dma;     goto set_val;
 999         }
1000
1001         switch (cmd) {
1002                 case HDIO_OBSOLETE_IDENTITY:
1003                 case HDIO_GET_IDENTITY:
1004                         if (bdev != bdev->bd_contains)
1005                                 return -EINVAL;
1006                         if (drive->id_read == 0)
1007                                 return -ENOMSG;
1008                         if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1009                                 return -EFAULT;
1010                         return 0;
1011
1012                 case HDIO_GET_NICE:
1013                         return put_user(drive->dsc_overlap      <<      IDE_NICE_DSC_OVERLAP    |
1014                                         drive->atapi_overlap    <<      IDE_NICE_ATAPI_OVERLAP  |
1015                                         drive->nice0            <<      IDE_NICE_0              |
1016                                         drive->nice1            <<      IDE_NICE_1              |
1017                                         drive->nice2            <<      IDE_NICE_2,
1018                                         (long __user *) arg);
1019
1020 #ifdef CONFIG_IDE_TASK_IOCTL
1021                 case HDIO_DRIVE_TASKFILE:
1022                         if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1023                                 return -EACCES;
1024                         switch(drive->media) {
1025                                 case ide_disk:
1026                                         return ide_taskfile_ioctl(drive, cmd, arg);
1027                                 default:
1028                                         return -ENOMSG;
1029                         }
1030 #endif /* CONFIG_IDE_TASK_IOCTL */
1031
1032                 case HDIO_DRIVE_CMD:
1033                         if (!capable(CAP_SYS_RAWIO))
1034                                 return -EACCES;
1035                         return ide_cmd_ioctl(drive, cmd, arg);
1036
1037                 case HDIO_DRIVE_TASK:
1038                         if (!capable(CAP_SYS_RAWIO))
1039                                 return -EACCES;
1040                         return ide_task_ioctl(drive, cmd, arg);
1041
1042                 case HDIO_SCAN_HWIF:
1043                 {
1044                         hw_regs_t hw;
1045                         int args[3];
1046                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1047                         if (copy_from_user(args, p, 3 * sizeof(int)))
1048                                 return -EFAULT;
1049                         memset(&hw, 0, sizeof(hw));
1050                         ide_init_hwif_ports(&hw, (unsigned long) args[0],
1051                                             (unsigned long) args[1], NULL);
1052                         hw.irq = args[2];
1053                         if (ide_register_hw(&hw, 0, NULL) == -1)
1054                                 return -EIO;
1055                         return 0;
1056                 }
1057                 case HDIO_UNREGISTER_HWIF:
1058                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1059                         /* (arg > MAX_HWIFS) checked in function */
1060                         ide_unregister(arg);
1061                         return 0;
1062                 case HDIO_SET_NICE:
1063                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1064                         if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1065                                 return -EPERM;
1066                         drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1067                         drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1068                         if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1069                                 drive->dsc_overlap = 0;
1070                                 return -EPERM;
1071                         }
1072                         drive->nice1 = (arg >> IDE_NICE_1) & 1;
1073                         return 0;
1074                 case HDIO_DRIVE_RESET:
1075                 {
1076                         unsigned long flags;
1077                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1078
1079                         /*
1080                          *      Abort the current command on the
1081                          *      group if there is one, taking
1082                          *      care not to allow anything else
1083                          *      to be queued and to die on the
1084                          *      spot if we miss one somehow
1085                          */
1086
1087                         spin_lock_irqsave(&ide_lock, flags);
1088
1089                         if (HWGROUP(drive)->resetting) {
1090                                 spin_unlock_irqrestore(&ide_lock, flags);
1091                                 return -EBUSY;
1092                         }
1093
1094                         ide_abort(drive, "drive reset");
1095
1096                         BUG_ON(HWGROUP(drive)->handler);
1097
1098                         /* Ensure nothing gets queued after we
1099                            drop the lock. Reset will clear the busy */
1100
1101                         HWGROUP(drive)->busy = 1;
1102                         spin_unlock_irqrestore(&ide_lock, flags);
1103                         (void) ide_do_reset(drive);
1104
1105                         return 0;
1106                 }
1107
1108                 case HDIO_GET_BUSSTATE:
1109                         if (!capable(CAP_SYS_ADMIN))
1110                                 return -EACCES;
1111                         if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1112                                 return -EFAULT;
1113                         return 0;
1114
1115                 case HDIO_SET_BUSSTATE:
1116                         if (!capable(CAP_SYS_ADMIN))
1117                                 return -EACCES;
1118                         if (HWIF(drive)->busproc)
1119                                 return HWIF(drive)->busproc(drive, (int)arg);
1120                         return -EOPNOTSUPP;
1121                 default:
1122                         return -EINVAL;
1123         }
1124
1125 read_val:
1126         mutex_lock(&ide_setting_mtx);
1127         spin_lock_irqsave(&ide_lock, flags);
1128         err = *val;
1129         spin_unlock_irqrestore(&ide_lock, flags);
1130         mutex_unlock(&ide_setting_mtx);
1131         return err >= 0 ? put_user(err, (long __user *)arg) : err;
1132
1133 set_val:
1134         if (bdev != bdev->bd_contains)
1135                 err = -EINVAL;
1136         else {
1137                 if (!capable(CAP_SYS_ADMIN))
1138                         err = -EACCES;
1139                 else {
1140                         mutex_lock(&ide_setting_mtx);
1141                         err = setfunc(drive, arg);
1142                         mutex_unlock(&ide_setting_mtx);
1143                 }
1144         }
1145         return err;
1146 }
1147
1148 EXPORT_SYMBOL(generic_ide_ioctl);
1149
1150 /*
1151  * stridx() returns the offset of c within s,
1152  * or -1 if c is '\0' or not found within s.
1153  */
1154 static int __init stridx (const char *s, char c)
1155 {
1156         char *i = strchr(s, c);
1157         return (i && c) ? i - s : -1;
1158 }
1159
1160 /*
1161  * match_parm() does parsing for ide_setup():
1162  *
1163  * 1. the first char of s must be '='.
1164  * 2. if the remainder matches one of the supplied keywords,
1165  *     the index (1 based) of the keyword is negated and returned.
1166  * 3. if the remainder is a series of no more than max_vals numbers
1167  *     separated by commas, the numbers are saved in vals[] and a
1168  *     count of how many were saved is returned.  Base10 is assumed,
1169  *     and base16 is allowed when prefixed with "0x".
1170  * 4. otherwise, zero is returned.
1171  */
1172 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1173 {
1174         static const char *decimal = "0123456789";
1175         static const char *hex = "0123456789abcdef";
1176         int i, n;
1177
1178         if (*s++ == '=') {
1179                 /*
1180                  * Try matching against the supplied keywords,
1181                  * and return -(index+1) if we match one
1182                  */
1183                 if (keywords != NULL) {
1184                         for (i = 0; *keywords != NULL; ++i) {
1185                                 if (!strcmp(s, *keywords++))
1186                                         return -(i+1);
1187                         }
1188                 }
1189                 /*
1190                  * Look for a series of no more than "max_vals"
1191                  * numeric values separated by commas, in base10,
1192                  * or base16 when prefixed with "0x".
1193                  * Return a count of how many were found.
1194                  */
1195                 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1196                         vals[n] = i;
1197                         while ((i = stridx(decimal, *++s)) >= 0)
1198                                 vals[n] = (vals[n] * 10) + i;
1199                         if (*s == 'x' && !vals[n]) {
1200                                 while ((i = stridx(hex, *++s)) >= 0)
1201                                         vals[n] = (vals[n] * 0x10) + i;
1202                         }
1203                         if (++n == max_vals)
1204                                 break;
1205                         if (*s == ',' || *s == ';')
1206                                 ++s;
1207                 }
1208                 if (!*s)
1209                         return n;
1210         }
1211         return 0;       /* zero = nothing matched */
1212 }
1213
1214 #ifdef CONFIG_BLK_DEV_ALI14XX
1215 extern int probe_ali14xx;
1216 extern int ali14xx_init(void);
1217 #endif
1218 #ifdef CONFIG_BLK_DEV_UMC8672
1219 extern int probe_umc8672;
1220 extern int umc8672_init(void);
1221 #endif
1222 #ifdef CONFIG_BLK_DEV_DTC2278
1223 extern int probe_dtc2278;
1224 extern int dtc2278_init(void);
1225 #endif
1226 #ifdef CONFIG_BLK_DEV_HT6560B
1227 extern int probe_ht6560b;
1228 extern int ht6560b_init(void);
1229 #endif
1230 #ifdef CONFIG_BLK_DEV_QD65XX
1231 extern int probe_qd65xx;
1232 extern int qd65xx_init(void);
1233 #endif
1234
1235 static int __initdata is_chipset_set[MAX_HWIFS];
1236
1237 /*
1238  * ide_setup() gets called VERY EARLY during initialization,
1239  * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1240  *
1241  * Remember to update Documentation/ide.txt if you change something here.
1242  */
1243 static int __init ide_setup(char *s)
1244 {
1245         int i, vals[3];
1246         ide_hwif_t *hwif;
1247         ide_drive_t *drive;
1248         unsigned int hw, unit;
1249         const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1250         const char max_hwif  = '0' + (MAX_HWIFS - 1);
1251
1252
1253         if (strncmp(s,"hd",2) == 0 && s[2] == '=')      /* hd= is for hd.c   */
1254                 return 0;                               /* driver and not us */
1255
1256         if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1257                 return 0;
1258
1259         printk(KERN_INFO "ide_setup: %s", s);
1260         init_ide_data ();
1261
1262 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1263         if (!strcmp(s, "ide=doubler")) {
1264                 extern int ide_doubler;
1265
1266                 printk(" : Enabled support for IDE doublers\n");
1267                 ide_doubler = 1;
1268                 return 1;
1269         }
1270 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1271
1272         if (!strcmp(s, "ide=nodma")) {
1273                 printk(" : Prevented DMA\n");
1274                 noautodma = 1;
1275                 return 1;
1276         }
1277
1278 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1279         if (!strcmp(s, "ide=reverse")) {
1280                 ide_scan_direction = 1;
1281                 printk(" : Enabled support for IDE inverse scan order.\n");
1282                 return 1;
1283         }
1284 #endif
1285
1286 #ifdef CONFIG_BLK_DEV_IDEACPI
1287         if (!strcmp(s, "ide=noacpi")) {
1288                 //printk(" : Disable IDE ACPI support.\n");
1289                 ide_noacpi = 1;
1290                 return 1;
1291         }
1292         if (!strcmp(s, "ide=acpigtf")) {
1293                 //printk(" : Enable IDE ACPI _GTF support.\n");
1294                 ide_noacpitfs = 0;
1295                 return 1;
1296         }
1297         if (!strcmp(s, "ide=acpionboot")) {
1298                 //printk(" : Call IDE ACPI methods on boot.\n");
1299                 ide_noacpionboot = 0;
1300                 return 1;
1301         }
1302 #endif /* CONFIG_BLK_DEV_IDEACPI */
1303
1304         /*
1305          * Look for drive options:  "hdx="
1306          */
1307         if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1308                 const char *hd_words[] = {
1309                         "none", "noprobe", "nowerr", "cdrom", "minus5",
1310                         "autotune", "noautotune", "minus8", "swapdata", "bswap",
1311                         "noflush", "remap", "remap63", "scsi", NULL };
1312                 unit = s[2] - 'a';
1313                 hw   = unit / MAX_DRIVES;
1314                 unit = unit % MAX_DRIVES;
1315                 hwif = &ide_hwifs[hw];
1316                 drive = &hwif->drives[unit];
1317                 if (strncmp(s + 4, "ide-", 4) == 0) {
1318                         strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1319                         goto done;
1320                 }
1321                 switch (match_parm(&s[3], hd_words, vals, 3)) {
1322                         case -1: /* "none" */
1323                         case -2: /* "noprobe" */
1324                                 drive->noprobe = 1;
1325                                 goto done;
1326                         case -3: /* "nowerr" */
1327                                 drive->bad_wstat = BAD_R_STAT;
1328                                 hwif->noprobe = 0;
1329                                 goto done;
1330                         case -4: /* "cdrom" */
1331                                 drive->present = 1;
1332                                 drive->media = ide_cdrom;
1333                                 /* an ATAPI device ignores DRDY */
1334                                 drive->ready_stat = 0;
1335                                 hwif->noprobe = 0;
1336                                 goto done;
1337                         case -6: /* "autotune" */
1338                                 drive->autotune = IDE_TUNE_AUTO;
1339                                 goto obsolete_option;
1340                         case -7: /* "noautotune" */
1341                                 drive->autotune = IDE_TUNE_NOAUTO;
1342                                 goto obsolete_option;
1343                         case -9: /* "swapdata" */
1344                         case -10: /* "bswap" */
1345                                 drive->bswap = 1;
1346                                 goto done;
1347                         case -11: /* noflush */
1348                                 drive->noflush = 1;
1349                                 goto done;
1350                         case -12: /* "remap" */
1351                                 drive->remap_0_to_1 = 1;
1352                                 goto done;
1353                         case -13: /* "remap63" */
1354                                 drive->sect0 = 63;
1355                                 goto done;
1356                         case -14: /* "scsi" */
1357                                 drive->scsi = 1;
1358                                 goto done;
1359                         case 3: /* cyl,head,sect */
1360                                 drive->media    = ide_disk;
1361                                 drive->ready_stat = READY_STAT;
1362                                 drive->cyl      = drive->bios_cyl  = vals[0];
1363                                 drive->head     = drive->bios_head = vals[1];
1364                                 drive->sect     = drive->bios_sect = vals[2];
1365                                 drive->present  = 1;
1366                                 drive->forced_geom = 1;
1367                                 hwif->noprobe = 0;
1368                                 goto done;
1369                         default:
1370                                 goto bad_option;
1371                 }
1372         }
1373
1374         if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1375                 goto bad_option;
1376         /*
1377          * Look for bus speed option:  "idebus="
1378          */
1379         if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1380                 if (match_parm(&s[6], NULL, vals, 1) != 1)
1381                         goto bad_option;
1382                 if (vals[0] >= 20 && vals[0] <= 66) {
1383                         idebus_parameter = vals[0];
1384                 } else
1385                         printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1386                 goto done;
1387         }
1388         /*
1389          * Look for interface options:  "idex="
1390          */
1391         if (s[3] >= '0' && s[3] <= max_hwif) {
1392                 /*
1393                  * Be VERY CAREFUL changing this: note hardcoded indexes below
1394                  * (-8, -9, -10) are reserved to ease the hardcoding.
1395                  */
1396                 static const char *ide_words[] = {
1397                         "noprobe", "serialize", "minus3", "minus4",
1398                         "reset", "minus6", "ata66", "minus8", "minus9",
1399                         "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1400                         "dtc2278", "umc8672", "ali14xx", NULL };
1401                 hw = s[3] - '0';
1402                 hwif = &ide_hwifs[hw];
1403                 i = match_parm(&s[4], ide_words, vals, 3);
1404
1405                 /*
1406                  * Cryptic check to ensure chipset not already set for hwif.
1407                  * Note: we can't depend on hwif->chipset here.
1408                  */
1409                 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1410                         /* chipset already specified */
1411                         if (is_chipset_set[hw])
1412                                 goto bad_option;
1413                         if (i > -18 && i <= -11) {
1414                                 /* these drivers are for "ide0=" only */
1415                                 if (hw != 0)
1416                                         goto bad_hwif;
1417                                 /* chipset already specified for 2nd port */
1418                                 if (is_chipset_set[hw+1])
1419                                         goto bad_option;
1420                         }
1421                         is_chipset_set[hw] = 1;
1422                         printk("\n");
1423                 }
1424
1425                 switch (i) {
1426 #ifdef CONFIG_BLK_DEV_ALI14XX
1427                         case -17: /* "ali14xx" */
1428                                 probe_ali14xx = 1;
1429                                 goto done;
1430 #endif
1431 #ifdef CONFIG_BLK_DEV_UMC8672
1432                         case -16: /* "umc8672" */
1433                                 probe_umc8672 = 1;
1434                                 goto done;
1435 #endif
1436 #ifdef CONFIG_BLK_DEV_DTC2278
1437                         case -15: /* "dtc2278" */
1438                                 probe_dtc2278 = 1;
1439                                 goto done;
1440 #endif
1441 #ifdef CONFIG_BLK_DEV_CMD640
1442                         case -14: /* "cmd640_vlb" */
1443                         {
1444                                 extern int cmd640_vlb; /* flag for cmd640.c */
1445                                 cmd640_vlb = 1;
1446                                 goto done;
1447                         }
1448 #endif
1449 #ifdef CONFIG_BLK_DEV_HT6560B
1450                         case -13: /* "ht6560b" */
1451                                 probe_ht6560b = 1;
1452                                 goto done;
1453 #endif
1454 #ifdef CONFIG_BLK_DEV_QD65XX
1455                         case -12: /* "qd65xx" */
1456                                 probe_qd65xx = 1;
1457                                 goto done;
1458 #endif
1459 #ifdef CONFIG_BLK_DEV_4DRIVES
1460                         case -11: /* "four" drives on one set of ports */
1461                         {
1462                                 ide_hwif_t *mate = &ide_hwifs[hw^1];
1463                                 mate->drives[0].select.all ^= 0x20;
1464                                 mate->drives[1].select.all ^= 0x20;
1465                                 hwif->chipset = mate->chipset = ide_4drives;
1466                                 mate->irq = hwif->irq;
1467                                 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1468                                 hwif->mate = mate;
1469                                 mate->mate = hwif;
1470                                 hwif->serialized = mate->serialized = 1;
1471                                 goto obsolete_option;
1472                         }
1473 #endif /* CONFIG_BLK_DEV_4DRIVES */
1474                         case -10: /* minus10 */
1475                         case -9: /* minus9 */
1476                         case -8: /* minus8 */
1477                         case -6:
1478                         case -4:
1479                         case -3:
1480                                 goto bad_option;
1481                         case -7: /* ata66 */
1482 #ifdef CONFIG_BLK_DEV_IDEPCI
1483                                 /*
1484                                  * Use ATA_CBL_PATA40_SHORT so drive side
1485                                  * cable detection is also overriden.
1486                                  */
1487                                 hwif->cbl = ATA_CBL_PATA40_SHORT;
1488                                 goto obsolete_option;
1489 #else
1490                                 goto bad_hwif;
1491 #endif
1492                         case -5: /* "reset" */
1493                                 hwif->reset = 1;
1494                                 goto obsolete_option;
1495                         case -2: /* "serialize" */
1496                                 hwif->mate = &ide_hwifs[hw^1];
1497                                 hwif->mate->mate = hwif;
1498                                 hwif->serialized = hwif->mate->serialized = 1;
1499                                 goto obsolete_option;
1500
1501                         case -1: /* "noprobe" */
1502                                 hwif->noprobe = 1;
1503                                 goto done;
1504
1505                         case 1: /* base */
1506                                 vals[1] = vals[0] + 0x206; /* default ctl */
1507                         case 2: /* base,ctl */
1508                                 vals[2] = 0;    /* default irq = probe for it */
1509                         case 3: /* base,ctl,irq */
1510                                 hwif->hw.irq = vals[2];
1511                                 ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq);
1512                                 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
1513                                 hwif->irq      = vals[2];
1514                                 hwif->noprobe  = 0;
1515                                 hwif->chipset  = ide_forced;
1516                                 goto obsolete_option;
1517
1518                         case 0: goto bad_option;
1519                         default:
1520                                 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1521                                 return 1;
1522                 }
1523         }
1524 bad_option:
1525         printk(" -- BAD OPTION\n");
1526         return 1;
1527 obsolete_option:
1528         printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1529         return 1;
1530 bad_hwif:
1531         printk("-- NOT SUPPORTED ON ide%d", hw);
1532 done:
1533         printk("\n");
1534         return 1;
1535 }
1536
1537 extern void __init pnpide_init(void);
1538 extern void __exit pnpide_exit(void);
1539 extern void __init h8300_ide_init(void);
1540
1541 /*
1542  * probe_for_hwifs() finds/initializes "known" IDE interfaces
1543  */
1544 static void __init probe_for_hwifs (void)
1545 {
1546 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1547         ide_scan_pcibus(ide_scan_direction);
1548 #endif
1549
1550 #ifdef CONFIG_ETRAX_IDE
1551         {
1552                 extern void init_e100_ide(void);
1553                 init_e100_ide();
1554         }
1555 #endif /* CONFIG_ETRAX_IDE */
1556 #ifdef CONFIG_BLK_DEV_CMD640
1557         {
1558                 extern void ide_probe_for_cmd640x(void);
1559                 ide_probe_for_cmd640x();
1560         }
1561 #endif /* CONFIG_BLK_DEV_CMD640 */
1562 #ifdef CONFIG_BLK_DEV_IDE_PMAC
1563         {
1564                 extern int pmac_ide_probe(void);
1565                 (void)pmac_ide_probe();
1566         }
1567 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
1568 #ifdef CONFIG_BLK_DEV_GAYLE
1569         {
1570                 extern void gayle_init(void);
1571                 gayle_init();
1572         }
1573 #endif /* CONFIG_BLK_DEV_GAYLE */
1574 #ifdef CONFIG_BLK_DEV_FALCON_IDE
1575         {
1576                 extern void falconide_init(void);
1577                 falconide_init();
1578         }
1579 #endif /* CONFIG_BLK_DEV_FALCON_IDE */
1580 #ifdef CONFIG_BLK_DEV_MAC_IDE
1581         {
1582                 extern void macide_init(void);
1583                 macide_init();
1584         }
1585 #endif /* CONFIG_BLK_DEV_MAC_IDE */
1586 #ifdef CONFIG_BLK_DEV_Q40IDE
1587         {
1588                 extern void q40ide_init(void);
1589                 q40ide_init();
1590         }
1591 #endif /* CONFIG_BLK_DEV_Q40IDE */
1592 #ifdef CONFIG_BLK_DEV_BUDDHA
1593         {
1594                 extern void buddha_init(void);
1595                 buddha_init();
1596         }
1597 #endif /* CONFIG_BLK_DEV_BUDDHA */
1598 #ifdef CONFIG_BLK_DEV_IDEPNP
1599         pnpide_init();
1600 #endif
1601 #ifdef CONFIG_H8300
1602         h8300_ide_init();
1603 #endif
1604 }
1605
1606 /*
1607  * Probe module
1608  */
1609
1610 EXPORT_SYMBOL(ide_lock);
1611
1612 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1613 {
1614         return 1;
1615 }
1616
1617 static char *media_string(ide_drive_t *drive)
1618 {
1619         switch (drive->media) {
1620         case ide_disk:
1621                 return "disk";
1622         case ide_cdrom:
1623                 return "cdrom";
1624         case ide_tape:
1625                 return "tape";
1626         case ide_floppy:
1627                 return "floppy";
1628         case ide_optical:
1629                 return "optical";
1630         default:
1631                 return "UNKNOWN";
1632         }
1633 }
1634
1635 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1636 {
1637         ide_drive_t *drive = to_ide_device(dev);
1638         return sprintf(buf, "%s\n", media_string(drive));
1639 }
1640
1641 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1642 {
1643         ide_drive_t *drive = to_ide_device(dev);
1644         return sprintf(buf, "%s\n", drive->name);
1645 }
1646
1647 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1648 {
1649         ide_drive_t *drive = to_ide_device(dev);
1650         return sprintf(buf, "ide:m-%s\n", media_string(drive));
1651 }
1652
1653 static struct device_attribute ide_dev_attrs[] = {
1654         __ATTR_RO(media),
1655         __ATTR_RO(drivename),
1656         __ATTR_RO(modalias),
1657         __ATTR_NULL
1658 };
1659
1660 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
1661 {
1662         ide_drive_t *drive = to_ide_device(dev);
1663
1664         add_uevent_var(env, "MEDIA=%s", media_string(drive));
1665         add_uevent_var(env, "DRIVENAME=%s", drive->name);
1666         add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
1667         return 0;
1668 }
1669
1670 static int generic_ide_probe(struct device *dev)
1671 {
1672         ide_drive_t *drive = to_ide_device(dev);
1673         ide_driver_t *drv = to_ide_driver(dev->driver);
1674
1675         return drv->probe ? drv->probe(drive) : -ENODEV;
1676 }
1677
1678 static int generic_ide_remove(struct device *dev)
1679 {
1680         ide_drive_t *drive = to_ide_device(dev);
1681         ide_driver_t *drv = to_ide_driver(dev->driver);
1682
1683         if (drv->remove)
1684                 drv->remove(drive);
1685
1686         return 0;
1687 }
1688
1689 static void generic_ide_shutdown(struct device *dev)
1690 {
1691         ide_drive_t *drive = to_ide_device(dev);
1692         ide_driver_t *drv = to_ide_driver(dev->driver);
1693
1694         if (dev->driver && drv->shutdown)
1695                 drv->shutdown(drive);
1696 }
1697
1698 struct bus_type ide_bus_type = {
1699         .name           = "ide",
1700         .match          = ide_bus_match,
1701         .uevent         = ide_uevent,
1702         .probe          = generic_ide_probe,
1703         .remove         = generic_ide_remove,
1704         .shutdown       = generic_ide_shutdown,
1705         .dev_attrs      = ide_dev_attrs,
1706         .suspend        = generic_ide_suspend,
1707         .resume         = generic_ide_resume,
1708 };
1709
1710 EXPORT_SYMBOL_GPL(ide_bus_type);
1711
1712 /*
1713  * This is gets invoked once during initialization, to set *everything* up
1714  */
1715 static int __init ide_init(void)
1716 {
1717         int ret;
1718
1719         printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
1720         system_bus_speed = ide_system_bus_speed();
1721
1722         ret = bus_register(&ide_bus_type);
1723         if (ret < 0) {
1724                 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1725                 return ret;
1726         }
1727
1728         init_ide_data();
1729
1730         proc_ide_create();
1731
1732 #ifdef CONFIG_BLK_DEV_ALI14XX
1733         if (probe_ali14xx)
1734                 (void)ali14xx_init();
1735 #endif
1736 #ifdef CONFIG_BLK_DEV_UMC8672
1737         if (probe_umc8672)
1738                 (void)umc8672_init();
1739 #endif
1740 #ifdef CONFIG_BLK_DEV_DTC2278
1741         if (probe_dtc2278)
1742                 (void)dtc2278_init();
1743 #endif
1744 #ifdef CONFIG_BLK_DEV_HT6560B
1745         if (probe_ht6560b)
1746                 (void)ht6560b_init();
1747 #endif
1748 #ifdef CONFIG_BLK_DEV_QD65XX
1749         if (probe_qd65xx)
1750                 (void)qd65xx_init();
1751 #endif
1752
1753         /* Probe for special PCI and other "known" interface chipsets. */
1754         probe_for_hwifs();
1755
1756         return 0;
1757 }
1758
1759 #ifdef MODULE
1760 static char *options = NULL;
1761 module_param(options, charp, 0);
1762 MODULE_LICENSE("GPL");
1763
1764 static void __init parse_options (char *line)
1765 {
1766         char *next = line;
1767
1768         if (line == NULL || !*line)
1769                 return;
1770         while ((line = next) != NULL) {
1771                 if ((next = strchr(line,' ')) != NULL)
1772                         *next++ = 0;
1773                 if (!ide_setup(line))
1774                         printk (KERN_INFO "Unknown option '%s'\n", line);
1775         }
1776 }
1777
1778 int __init init_module (void)
1779 {
1780         parse_options(options);
1781         return ide_init();
1782 }
1783
1784 void __exit cleanup_module (void)
1785 {
1786         int index;
1787
1788         for (index = 0; index < MAX_HWIFS; ++index)
1789                 ide_unregister(index);
1790
1791 #ifdef CONFIG_BLK_DEV_IDEPNP
1792         pnpide_exit();
1793 #endif
1794
1795         proc_ide_destroy();
1796
1797         bus_unregister(&ide_bus_type);
1798 }
1799
1800 #else /* !MODULE */
1801
1802 __setup("", ide_setup);
1803
1804 module_init(ide_init);
1805
1806 #endif /* MODULE */