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  * Primary:    ide0, port 0x1f0; major=3;  hda is minor=0; hdb is minor=64
  20  * Secondary:  ide1, port 0x170; major=22; hdc is minor=0; hdd is minor=64
  21  * Tertiary:   ide2, port 0x???; major=33; hde is minor=0; hdf is minor=64
  22  * Quaternary: ide3, port 0x???; major=34; hdg is minor=0; hdh is minor=64
  23  * ...
  24  *
  25  *  From hd.c:
  26  *  |
  27  *  | It traverses the request-list, using interrupts to jump between functions.
  28  *  | As nearly all functions can be called within interrupts, we may not sleep.
  29  *  | Special care is recommended.  Have Fun!
  30  *  |
  31  *  | modified by Drew Eckhardt to check nr of hd's from the CMOS.
  32  *  |
  33  *  | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
  34  *  | in the early extended-partition checks and added DM partitions.
  35  *  |
  36  *  | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
  37  *  |
  38  *  | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
  39  *  | and general streamlining by Mark Lord (mlord@pobox.com).
  40  *
  41  *  October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
  42  *
  43  *      Mark Lord       (mlord@pobox.com)               (IDE Perf.Pkg)
  44  *      Delman Lee      (delman@ieee.org)               ("Mr. atdisk2")
  45  *      Scott Snyder    (snyder@fnald0.fnal.gov)        (ATAPI IDE cd-rom)
  46  *
  47  *  This was a rewrite of just about everything from hd.c, though some original
  48  *  code is still sprinkled about.  Think of it as a major evolution, with
  49  *  inspiration from lots of linux users, esp.  hamish@zot.apana.org.au
  50  *
  51  *  Version 1.0 ALPHA   initial code, primary i/f working okay
  52  *  Version 1.3 BETA    dual i/f on shared irq tested & working!
  53  *  Version 1.4 BETA    added auto probing for irq(s)
  54  *  Version 1.5 BETA    added ALPHA (untested) support for IDE cd-roms,
  55  *  ...
  56  * Version 5.50         allow values as small as 20 for idebus=
  57  * Version 5.51         force non io_32bit in drive_cmd_intr()
  58  *                      change delay_10ms() to delay_50ms() to fix problems
  59  * Version 5.52         fix incorrect invalidation of removable devices
  60  *                      add "hdx=slow" command line option
  61  * Version 5.60         start to modularize the driver; the disk and ATAPI
  62  *                       drivers can be compiled as loadable modules.
  63  *                      move IDE probe code to ide-probe.c
  64  *                      move IDE disk code to ide-disk.c
  65  *                      add support for generic IDE device subdrivers
  66  *                      add m68k code from Geert Uytterhoeven
  67  *                      probe all interfaces by default
  68  *                      add ioctl to (re)probe an interface
  69  * Version 6.00         use per device request queues
  70  *                      attempt to optimize shared hwgroup performance
  71  *                      add ioctl to manually adjust bandwidth algorithms
  72  *                      add kerneld support for the probe module
  73  *                      fix bug in ide_error()
  74  *                      fix bug in the first ide_get_lock() call for Atari
  75  *                      don't flush leftover data for ATAPI devices
  76  * Version 6.01         clear hwgroup->active while the hwgroup sleeps
  77  *                      support HDIO_GETGEO for floppies
  78  * Version 6.02         fix ide_ack_intr() call
  79  *                      check partition table on floppies
  80  * Version 6.03         handle bad status bit sequencing in ide_wait_stat()
  81  * Version 6.10         deleted old entries from this list of updates
  82  *                      replaced triton.c with ide-dma.c generic PCI DMA
  83  *                      added support for BIOS-enabled UltraDMA
  84  *                      rename all "promise" things to "pdc4030"
  85  *                      fix EZ-DRIVE handling on small disks
  86  * Version 6.11         fix probe error in ide_scan_devices()
  87  *                      fix ancient "jiffies" polling bugs
  88  *                      mask all hwgroup interrupts on each irq entry
  89  * Version 6.12         integrate ioctl and proc interfaces
  90  *                      fix parsing of "idex=" command line parameter
  91  * Version 6.13         add support for ide4/ide5 courtesy rjones@orchestream.com
  92  * Version 6.14         fixed IRQ sharing among PCI devices
  93  * Version 6.15         added SMP awareness to IDE drivers
  94  * Version 6.16         fixed various bugs; even more SMP friendly
  95  * Version 6.17         fix for newest EZ-Drive problem
  96  * Version 6.18         default unpartitioned-disk translation now "BIOS LBA"
  97  * Version 6.19         Re-design for a UNIFORM driver for all platforms,
  98  *                        model based on suggestions from Russell King and
  99  *                        Geert Uytterhoeven
 100  *                      Promise DC4030VL now supported.
 101  *                      add support for ide6/ide7
 102  *                      delay_50ms() changed to ide_delay_50ms() and exported.
 103  * Version 6.20         Added/Fixed Generic ATA-66 support and hwif detection.
 104  *                      Added hdx=flash to allow for second flash disk
 105  *                        detection w/o the hang loop.
 106  *                      Added support for ide8/ide9
 107  *                      Added idex=ata66 for the quirky chipsets that are
 108  *                        ATA-66 compliant, but have yet to determine a method
 109  *                        of verification of the 80c cable presence.
 110  *                        Specifically Promise's PDC20262 chipset.
 111  * Version 6.21         Fixing/Fixed SMP spinlock issue with insight from an old
 112  *                        hat that clarified original low level driver design.
 113  * Version 6.30         Added SMP support; fixed multmode issues.  -ml
 114  * Version 6.31         Debug Share INTR's and request queue streaming
 115  *                      Native ATA-100 support
 116  *                      Prep for Cascades Project
 117  * Version 7.00alpha    First named revision of ide rearrange
 118  *
 119  *  Some additional driver compile-time options are in ./include/linux/ide.h
 120  *
 121  *  To do, in likely order of completion:
 122  *      - modify kernel to obtain BIOS geometry for drives on 2nd/3rd/4th i/f
 123  *
 124  */
 125
 126 #define REVISION        "Revision: 7.00alpha2"
 127 #define VERSION         "Id: ide.c 7.00a2 20020906"
 128
 129 #undef REALLY_SLOW_IO           /* most systems can safely undef this */
 130
 131 #define _IDE_C                  /* Tell ide.h it's really us */
 132
 133 #include <linux/config.h>
 134 #include <linux/module.h>
 135 #include <linux/types.h>
 136 #include <linux/string.h>
 137 #include <linux/kernel.h>
 138 #include <linux/timer.h>
 139 #include <linux/mm.h>
 140 #include <linux/interrupt.h>
 141 #include <linux/major.h>
 142 #include <linux/errno.h>
 143 #include <linux/genhd.h>
 144 #include <linux/blkpg.h>
 145 #include <linux/slab.h>
 146 #include <linux/init.h>
 147 #include <linux/pci.h>
 148 #include <linux/delay.h>
 149 #include <linux/ide.h>
 150 #include <linux/devfs_fs_kernel.h>
 151 #include <linux/completion.h>
 152 #include <linux/reboot.h>
 153 #include <linux/cdrom.h>
 154 #include <linux/seq_file.h>
 155 #include <linux/device.h>
 156 #include <linux/bitops.h>
 157
 158 #include <asm/byteorder.h>
 159 #include <asm/irq.h>
 160 #include <asm/uaccess.h>
 161 #include <asm/io.h>
 162
 163
 164 /* default maximum number of failures */
 165 #define IDE_DEFAULT_MAX_FAILURES        1
 166
 167 static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
 168                                         IDE2_MAJOR, IDE3_MAJOR,
 169                                         IDE4_MAJOR, IDE5_MAJOR,
 170                                         IDE6_MAJOR, IDE7_MAJOR,
 171                                         IDE8_MAJOR, IDE9_MAJOR };
 172
 173 static int idebus_parameter;    /* holds the "idebus=" parameter */
 174 static int system_bus_speed;    /* holds what we think is VESA/PCI bus speed */
 175 static int initializing;        /* set while initializing built-in drivers */
 176
 177 DECLARE_MUTEX(ide_cfg_sem);
 178  __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
 179
 180 #ifdef CONFIG_BLK_DEV_IDEPCI
 181 static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
 182 #endif
 183
 184 #ifdef CONFIG_IDEDMA_AUTO
 185 int noautodma = 0;
 186 #else
 187 int noautodma = 1;
 188 #endif
 189
 190 EXPORT_SYMBOL(noautodma);
 191
 192 /*
 193  * This is declared extern in ide.h, for access by other IDE modules:
 194  */
 195 ide_hwif_t ide_hwifs[MAX_HWIFS];        /* master data repository */
 196
 197 EXPORT_SYMBOL(ide_hwifs);
 198
 199 /*
 200  * Do not even *think* about calling this!
 201  */
 202 static void init_hwif_data(ide_hwif_t *hwif, unsigned int index)
 203 {
 204         unsigned int unit;
 205
 206         /* bulk initialize hwif & drive info with zeros */
 207         memset(hwif, 0, sizeof(ide_hwif_t));
 208
 209         /* fill in any non-zero initial values */
 210         hwif->index     = index;
 211         hwif->major     = ide_hwif_to_major[index];
 212
 213         hwif->name[0]   = 'i';
 214         hwif->name[1]   = 'd';
 215         hwif->name[2]   = 'e';
 216         hwif->name[3]   = '0' + index;
 217
 218         hwif->bus_state = BUSSTATE_ON;
 219
 220         hwif->atapi_dma = 0;            /* disable all atapi dma */
 221         hwif->ultra_mask = 0x80;        /* disable all ultra */
 222         hwif->mwdma_mask = 0x80;        /* disable all mwdma */
 223         hwif->swdma_mask = 0x80;        /* disable all swdma */
 224
 225         init_completion(&hwif->gendev_rel_comp);
 226
 227         default_hwif_iops(hwif);
 228         default_hwif_transport(hwif);
 229         for (unit = 0; unit < MAX_DRIVES; ++unit) {
 230                 ide_drive_t *drive = &hwif->drives[unit];
 231
 232                 drive->media                    = ide_disk;
 233                 drive->select.all               = (unit<<4)|0xa0;
 234                 drive->hwif                     = hwif;
 235                 drive->ctl                      = 0x08;
 236                 drive->ready_stat               = READY_STAT;
 237                 drive->bad_wstat                = BAD_W_STAT;
 238                 drive->special.b.recalibrate    = 1;
 239                 drive->special.b.set_geometry   = 1;
 240                 drive->name[0]                  = 'h';
 241                 drive->name[1]                  = 'd';
 242                 drive->name[2]                  = 'a' + (index * MAX_DRIVES) + unit;
 243                 drive->max_failures             = IDE_DEFAULT_MAX_FAILURES;
 244                 drive->using_dma                = 0;
 245                 drive->is_flash                 = 0;
 246                 drive->vdma                     = 0;
 247                 INIT_LIST_HEAD(&drive->list);
 248                 init_completion(&drive->gendev_rel_comp);
 249         }
 250 }
 251
 252 static void init_hwif_default(ide_hwif_t *hwif, unsigned int index)
 253 {
 254         hw_regs_t hw;
 255
 256         memset(&hw, 0, sizeof(hw_regs_t));
 257
 258         ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq);
 259
 260         memcpy(&hwif->hw, &hw, sizeof(hw));
 261         memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
 262
 263         hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
 264 #ifdef CONFIG_BLK_DEV_HD
 265         if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA)
 266                 hwif->noprobe = 1;      /* may be overridden by ide_setup() */
 267 #endif
 268 }
 269
 270 extern void ide_arm_init(void);
 271
 272 /*
 273  * init_ide_data() sets reasonable default values into all fields
 274  * of all instances of the hwifs and drives, but only on the first call.
 275  * Subsequent calls have no effect (they don't wipe out anything).
 276  *
 277  * This routine is normally called at driver initialization time,
 278  * but may also be called MUCH earlier during kernel "command-line"
 279  * parameter processing.  As such, we cannot depend on any other parts
 280  * of the kernel (such as memory allocation) to be functioning yet.
 281  *
 282  * This is too bad, as otherwise we could dynamically allocate the
 283  * ide_drive_t structs as needed, rather than always consuming memory
 284  * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
 285  *
 286  * FIXME: We should stuff the setup data into __init and copy the
 287  * relevant hwifs/allocate them properly during boot.
 288  */
 289 #define MAGIC_COOKIE 0x12345678
 290 static void __init init_ide_data (void)
 291 {
 292         ide_hwif_t *hwif;
 293         unsigned int index;
 294         static unsigned long magic_cookie = MAGIC_COOKIE;
 295
 296         if (magic_cookie != MAGIC_COOKIE)
 297                 return;         /* already initialized */
 298         magic_cookie = 0;
 299
 300         /* Initialise all interface structures */
 301         for (index = 0; index < MAX_HWIFS; ++index) {
 302                 hwif = &ide_hwifs[index];
 303                 init_hwif_data(hwif, index);
 304                 init_hwif_default(hwif, index);
 305 #if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
 306                 hwif->irq = hwif->hw.irq =
 307                         ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
 308 #endif
 309         }
 310 #ifdef CONFIG_IDE_ARM
 311         initializing = 1;
 312         ide_arm_init();
 313         initializing = 0;
 314 #endif
 315 }
 316
 317 /**
 318  *      ide_system_bus_speed    -       guess bus speed
 319  *
 320  *      ide_system_bus_speed() returns what we think is the system VESA/PCI
 321  *      bus speed (in MHz). This is used for calculating interface PIO timings.
 322  *      The default is 40 for known PCI systems, 50 otherwise.
 323  *      The "idebus=xx" parameter can be used to override this value.
 324  *      The actual value to be used is computed/displayed the first time
 325  *      through. Drivers should only use this as a last resort.
 326  *
 327  *      Returns a guessed speed in MHz.
 328  */
 329
 330 static int ide_system_bus_speed(void)
 331 {
 332 #ifdef CONFIG_PCI
 333         static struct pci_device_id pci_default[] = {
 334                 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
 335                 { }
 336         };
 337 #else
 338 #define pci_default 0
 339 #endif /* CONFIG_PCI */
 340
 341         if (!system_bus_speed) {
 342                 if (idebus_parameter) {
 343                         /* user supplied value */
 344                         system_bus_speed = idebus_parameter;
 345                 } else if (pci_dev_present(pci_default)) {
 346                         /* safe default value for PCI */
 347                         system_bus_speed = 33;
 348                 } else {
 349                         /* safe default value for VESA and PCI */
 350                         system_bus_speed = 50;
 351                 }
 352                 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
 353                         "for PIO modes%s\n", system_bus_speed,
 354                         idebus_parameter ? "" : "; override with idebus=xx");
 355         }
 356         return system_bus_speed;
 357 }
 358
 359 #ifdef CONFIG_PROC_FS
 360 struct proc_dir_entry *proc_ide_root;
 361 #endif
 362
 363 static struct resource* hwif_request_region(ide_hwif_t *hwif,
 364                                             unsigned long addr, int num)
 365 {
 366         struct resource *res = request_region(addr, num, hwif->name);
 367
 368         if (!res)
 369                 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
 370                                 hwif->name, addr, addr+num-1);
 371         return res;
 372 }
 373
 374 /**
 375  *      ide_hwif_request_regions - request resources for IDE
 376  *      @hwif: interface to use
 377  *
 378  *      Requests all the needed resources for an interface.
 379  *      Right now core IDE code does this work which is deeply wrong.
 380  *      MMIO leaves it to the controller driver,
 381  *      PIO will migrate this way over time.
 382  */
 383
 384 int ide_hwif_request_regions(ide_hwif_t *hwif)
 385 {
 386         unsigned long addr;
 387         unsigned int i;
 388
 389         if (hwif->mmio == 2)
 390                 return 0;
 391         BUG_ON(hwif->mmio == 1);
 392         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
 393         if (addr && !hwif_request_region(hwif, addr, 1))
 394                 goto control_region_busy;
 395         hwif->straight8 = 0;
 396         addr = hwif->io_ports[IDE_DATA_OFFSET];
 397         if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
 398                 if (!hwif_request_region(hwif, addr, 8))
 399                         goto data_region_busy;
 400                 hwif->straight8 = 1;
 401                 return 0;
 402         }
 403         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
 404                 addr = hwif->io_ports[i];
 405                 if (!hwif_request_region(hwif, addr, 1)) {
 406                         while (--i)
 407                                 release_region(addr, 1);
 408                         goto data_region_busy;
 409                 }
 410         }
 411         return 0;
 412
 413 data_region_busy:
 414         addr = hwif->io_ports[IDE_CONTROL_OFFSET];
 415         if (addr)
 416                 release_region(addr, 1);
 417 control_region_busy:
 418         /* If any errors are return, we drop the hwif interface. */
 419         return -EBUSY;
 420 }
 421
 422 /**
 423  *      ide_hwif_release_regions - free IDE resources
 424  *
 425  *      Note that we only release the standard ports,
 426  *      and do not even try to handle any extra ports
 427  *      allocated for weird IDE interface chipsets.
 428  *
 429  *      Note also that we don't yet handle mmio resources here. More
 430  *      importantly our caller should be doing this so we need to
 431  *      restructure this as a helper function for drivers.
 432  */
 433
 434 void ide_hwif_release_regions(ide_hwif_t *hwif)
 435 {
 436         u32 i = 0;
 437
 438         if (hwif->mmio == 2)
 439                 return;
 440         if (hwif->io_ports[IDE_CONTROL_OFFSET])
 441                 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
 442         if (hwif->straight8) {
 443                 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
 444                 return;
 445         }
 446         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
 447                 if (hwif->io_ports[i])
 448                         release_region(hwif->io_ports[i], 1);
 449 }
 450
 451 /**
 452  *      ide_hwif_restore        -       restore hwif to template
 453  *      @hwif: hwif to update
 454  *      @tmp_hwif: template
 455  *
 456  *      Restore hwif to a previous state by copying most settngs
 457  *      from the template.
 458  */
 459
 460 static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
 461 {
 462         hwif->hwgroup                   = tmp_hwif->hwgroup;
 463
 464         hwif->gendev.parent             = tmp_hwif->gendev.parent;
 465
 466         hwif->proc                      = tmp_hwif->proc;
 467
 468         hwif->major                     = tmp_hwif->major;
 469         hwif->straight8                 = tmp_hwif->straight8;
 470         hwif->bus_state                 = tmp_hwif->bus_state;
 471
 472         hwif->atapi_dma                 = tmp_hwif->atapi_dma;
 473         hwif->ultra_mask                = tmp_hwif->ultra_mask;
 474         hwif->mwdma_mask                = tmp_hwif->mwdma_mask;
 475         hwif->swdma_mask                = tmp_hwif->swdma_mask;
 476
 477         hwif->chipset                   = tmp_hwif->chipset;
 478         hwif->hold                      = tmp_hwif->hold;
 479
 480 #ifdef CONFIG_BLK_DEV_IDEPCI
 481         hwif->pci_dev                   = tmp_hwif->pci_dev;
 482         hwif->cds                       = tmp_hwif->cds;
 483 #endif
 484
 485         hwif->tuneproc                  = tmp_hwif->tuneproc;
 486         hwif->speedproc                 = tmp_hwif->speedproc;
 487         hwif->selectproc                = tmp_hwif->selectproc;
 488         hwif->reset_poll                = tmp_hwif->reset_poll;
 489         hwif->pre_reset                 = tmp_hwif->pre_reset;
 490         hwif->resetproc                 = tmp_hwif->resetproc;
 491         hwif->intrproc                  = tmp_hwif->intrproc;
 492         hwif->maskproc                  = tmp_hwif->maskproc;
 493         hwif->quirkproc                 = tmp_hwif->quirkproc;
 494         hwif->busproc                   = tmp_hwif->busproc;
 495
 496         hwif->ata_input_data            = tmp_hwif->ata_input_data;
 497         hwif->ata_output_data           = tmp_hwif->ata_output_data;
 498         hwif->atapi_input_bytes         = tmp_hwif->atapi_input_bytes;
 499         hwif->atapi_output_bytes        = tmp_hwif->atapi_output_bytes;
 500
 501         hwif->dma_setup                 = tmp_hwif->dma_setup;
 502         hwif->dma_exec_cmd              = tmp_hwif->dma_exec_cmd;
 503         hwif->dma_start                 = tmp_hwif->dma_start;
 504         hwif->ide_dma_end               = tmp_hwif->ide_dma_end;
 505         hwif->ide_dma_check             = tmp_hwif->ide_dma_check;
 506         hwif->ide_dma_on                = tmp_hwif->ide_dma_on;
 507         hwif->ide_dma_off_quietly       = tmp_hwif->ide_dma_off_quietly;
 508         hwif->ide_dma_test_irq          = tmp_hwif->ide_dma_test_irq;
 509         hwif->ide_dma_host_on           = tmp_hwif->ide_dma_host_on;
 510         hwif->ide_dma_host_off          = tmp_hwif->ide_dma_host_off;
 511         hwif->ide_dma_lostirq           = tmp_hwif->ide_dma_lostirq;
 512         hwif->ide_dma_timeout           = tmp_hwif->ide_dma_timeout;
 513
 514         hwif->OUTB                      = tmp_hwif->OUTB;
 515         hwif->OUTBSYNC                  = tmp_hwif->OUTBSYNC;
 516         hwif->OUTW                      = tmp_hwif->OUTW;
 517         hwif->OUTL                      = tmp_hwif->OUTL;
 518         hwif->OUTSW                     = tmp_hwif->OUTSW;
 519         hwif->OUTSL                     = tmp_hwif->OUTSL;
 520
 521         hwif->INB                       = tmp_hwif->INB;
 522         hwif->INW                       = tmp_hwif->INW;
 523         hwif->INL                       = tmp_hwif->INL;
 524         hwif->INSW                      = tmp_hwif->INSW;
 525         hwif->INSL                      = tmp_hwif->INSL;
 526
 527         hwif->sg_max_nents              = tmp_hwif->sg_max_nents;
 528
 529         hwif->mmio                      = tmp_hwif->mmio;
 530         hwif->rqsize                    = tmp_hwif->rqsize;
 531         hwif->no_lba48                  = tmp_hwif->no_lba48;
 532
 533 #ifndef CONFIG_BLK_DEV_IDECS
 534         hwif->irq                       = tmp_hwif->irq;
 535 #endif
 536
 537         hwif->dma_base                  = tmp_hwif->dma_base;
 538         hwif->dma_master                = tmp_hwif->dma_master;
 539         hwif->dma_command               = tmp_hwif->dma_command;
 540         hwif->dma_vendor1               = tmp_hwif->dma_vendor1;
 541         hwif->dma_status                = tmp_hwif->dma_status;
 542         hwif->dma_vendor3               = tmp_hwif->dma_vendor3;
 543         hwif->dma_prdtable              = tmp_hwif->dma_prdtable;
 544
 545         hwif->dma_extra                 = tmp_hwif->dma_extra;
 546         hwif->config_data               = tmp_hwif->config_data;
 547         hwif->select_data               = tmp_hwif->select_data;
 548         hwif->autodma                   = tmp_hwif->autodma;
 549         hwif->udma_four                 = tmp_hwif->udma_four;
 550         hwif->no_dsc                    = tmp_hwif->no_dsc;
 551
 552         hwif->hwif_data                 = tmp_hwif->hwif_data;
 553 }
 554
 555 /**
 556  *      ide_unregister          -       free an ide interface
 557  *      @index: index of interface (will change soon to a pointer)
 558  *
 559  *      Perform the final unregister of an IDE interface. At the moment
 560  *      we don't refcount interfaces so this will also get split up.
 561  *
 562  *      Locking:
 563  *      The caller must not hold the IDE locks
 564  *      The drive present/vanishing is not yet properly locked
 565  *      Take care with the callbacks. These have been split to avoid
 566  *      deadlocking the IDE layer. The shutdown callback is called
 567  *      before we take the lock and free resources. It is up to the
 568  *      caller to be sure there is no pending I/O here, and that
 569  *      the interfce will not be reopened (present/vanishing locking
 570  *      isnt yet done btw). After we commit to the final kill we
 571  *      call the cleanup callback with the ide locks held.
 572  *
 573  *      Unregister restores the hwif structures to the default state.
 574  *      This is raving bonkers.
 575  */
 576
 577 void ide_unregister(unsigned int index)
 578 {
 579         ide_drive_t *drive;
 580         ide_hwif_t *hwif, *g;
 581         static ide_hwif_t tmp_hwif; /* protected by ide_cfg_sem */
 582         ide_hwgroup_t *hwgroup;
 583         int irq_count = 0, unit;
 584
 585         BUG_ON(index >= MAX_HWIFS);
 586
 587         BUG_ON(in_interrupt());
 588         BUG_ON(irqs_disabled());
 589         down(&ide_cfg_sem);
 590         spin_lock_irq(&ide_lock);
 591         hwif = &ide_hwifs[index];
 592         if (!hwif->present)
 593                 goto abort;
 594         for (unit = 0; unit < MAX_DRIVES; ++unit) {
 595                 drive = &hwif->drives[unit];
 596                 if (!drive->present) {
 597                         if (drive->devfs_name[0] != '\0') {
 598                                 devfs_remove(drive->devfs_name);
 599                                 drive->devfs_name[0] = '\0';
 600                         }
 601                         continue;
 602                 }
 603                 spin_unlock_irq(&ide_lock);
 604                 device_unregister(&drive->gendev);
 605                 wait_for_completion(&drive->gendev_rel_comp);
 606                 spin_lock_irq(&ide_lock);
 607         }
 608         hwif->present = 0;
 609
 610         spin_unlock_irq(&ide_lock);
 611
 612         destroy_proc_ide_interface(hwif);
 613
 614         hwgroup = hwif->hwgroup;
 615         /*
 616          * free the irq if we were the only hwif using it
 617          */
 618         g = hwgroup->hwif;
 619         do {
 620                 if (g->irq == hwif->irq)
 621                         ++irq_count;
 622                 g = g->next;
 623         } while (g != hwgroup->hwif);
 624         if (irq_count == 1)
 625                 free_irq(hwif->irq, hwgroup);
 626
 627         spin_lock_irq(&ide_lock);
 628         /*
 629          * Note that we only release the standard ports,
 630          * and do not even try to handle any extra ports
 631          * allocated for weird IDE interface chipsets.
 632          */
 633         ide_hwif_release_regions(hwif);
 634
 635         /*
 636          * Remove us from the hwgroup, and free
 637          * the hwgroup if we were the only member
 638          */
 639         if (hwif->next == hwif) {
 640                 BUG_ON(hwgroup->hwif != hwif);
 641                 kfree(hwgroup);
 642         } else {
 643                 /* There is another interface in hwgroup.
 644                  * Unlink us, and set hwgroup->drive and ->hwif to
 645                  * something sane.
 646                  */
 647                 g = hwgroup->hwif;
 648                 while (g->next != hwif)
 649                         g = g->next;
 650                 g->next = hwif->next;
 651                 if (hwgroup->hwif == hwif) {
 652                         /* Chose a random hwif for hwgroup->hwif.
 653                          * It's guaranteed that there are no drives
 654                          * left in the hwgroup.
 655                          */
 656                         BUG_ON(hwgroup->drive != NULL);
 657                         hwgroup->hwif = g;
 658                 }
 659                 BUG_ON(hwgroup->hwif == hwif);
 660         }
 661
 662         /* More messed up locking ... */
 663         spin_unlock_irq(&ide_lock);
 664         device_unregister(&hwif->gendev);
 665         wait_for_completion(&hwif->gendev_rel_comp);
 666
 667         /*
 668          * Remove us from the kernel's knowledge
 669          */
 670         blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
 671         kfree(hwif->sg_table);
 672         unregister_blkdev(hwif->major, hwif->name);
 673         spin_lock_irq(&ide_lock);
 674
 675         if (hwif->dma_base) {
 676                 (void) ide_release_dma(hwif);
 677
 678                 hwif->dma_base = 0;
 679                 hwif->dma_master = 0;
 680                 hwif->dma_command = 0;
 681                 hwif->dma_vendor1 = 0;
 682                 hwif->dma_status = 0;
 683                 hwif->dma_vendor3 = 0;
 684                 hwif->dma_prdtable = 0;
 685         }
 686
 687         /* copy original settings */
 688         tmp_hwif = *hwif;
 689
 690         /* restore hwif data to pristine status */
 691         init_hwif_data(hwif, index);
 692         init_hwif_default(hwif, index);
 693
 694         ide_hwif_restore(hwif, &tmp_hwif);
 695
 696 abort:
 697         spin_unlock_irq(&ide_lock);
 698         up(&ide_cfg_sem);
 699 }
 700
 701 EXPORT_SYMBOL(ide_unregister);
 702
 703
 704 /**
 705  *      ide_setup_ports         -       set up IDE interface ports
 706  *      @hw: register descriptions
 707  *      @base: base register
 708  *      @offsets: table of register offsets
 709  *      @ctrl: control register
 710  *      @ack_irq: IRQ ack
 711  *      @irq: interrupt lie
 712  *
 713  *      Setup hw_regs_t structure described by parameters.  You
 714  *      may set up the hw structure yourself OR use this routine to
 715  *      do it for you. This is basically a helper
 716  *
 717  */
 718
 719 void ide_setup_ports (  hw_regs_t *hw,
 720                         unsigned long base, int *offsets,
 721                         unsigned long ctrl, unsigned long intr,
 722                         ide_ack_intr_t *ack_intr,
 723 /*
 724  *                      ide_io_ops_t *iops,
 725  */
 726                         int irq)
 727 {
 728         int i;
 729
 730         for (i = 0; i < IDE_NR_PORTS; i++) {
 731                 if (offsets[i] == -1) {
 732                         switch(i) {
 733                                 case IDE_CONTROL_OFFSET:
 734                                         hw->io_ports[i] = ctrl;
 735                                         break;
 736 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
 737                                 case IDE_IRQ_OFFSET:
 738                                         hw->io_ports[i] = intr;
 739                                         break;
 740 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
 741                                 default:
 742                                         hw->io_ports[i] = 0;
 743                                         break;
 744                         }
 745                 } else {
 746                         hw->io_ports[i] = base + offsets[i];
 747                 }
 748         }
 749         hw->irq = irq;
 750         hw->dma = NO_DMA;
 751         hw->ack_intr = ack_intr;
 752 /*
 753  *      hw->iops = iops;
 754  */
 755 }
 756
 757 /**
 758  *      ide_register_hw_with_fixup      -       register IDE interface
 759  *      @hw: hardware registers
 760  *      @hwifp: pointer to returned hwif
 761  *      @fixup: fixup function
 762  *
 763  *      Register an IDE interface, specifying exactly the registers etc.
 764  *      Set init=1 iff calling before probes have taken place.
 765  *
 766  *      Returns -1 on error.
 767  */
 768
 769 int ide_register_hw_with_fixup(hw_regs_t *hw, ide_hwif_t **hwifp, void(*fixup)(ide_hwif_t *hwif))
 770 {
 771         int index, retry = 1;
 772         ide_hwif_t *hwif;
 773
 774         do {
 775                 for (index = 0; index < MAX_HWIFS; ++index) {
 776                         hwif = &ide_hwifs[index];
 777                         if (hwif->hw.io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
 778                                 goto found;
 779                 }
 780                 for (index = 0; index < MAX_HWIFS; ++index) {
 781                         hwif = &ide_hwifs[index];
 782                         if (hwif->hold)
 783                                 continue;
 784                         if ((!hwif->present && !hwif->mate && !initializing) ||
 785                             (!hwif->hw.io_ports[IDE_DATA_OFFSET] && initializing))
 786                                 goto found;
 787                 }
 788                 for (index = 0; index < MAX_HWIFS; index++)
 789                         ide_unregister(index);
 790         } while (retry--);
 791         return -1;
 792 found:
 793         if (hwif->present)
 794                 ide_unregister(index);
 795         else if (!hwif->hold) {
 796                 init_hwif_data(hwif, index);
 797                 init_hwif_default(hwif, index);
 798         }
 799         if (hwif->present)
 800                 return -1;
 801         memcpy(&hwif->hw, hw, sizeof(*hw));
 802         memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports));
 803         hwif->irq = hw->irq;
 804         hwif->noprobe = 0;
 805         hwif->chipset = hw->chipset;
 806         hwif->gendev.parent = hw->dev;
 807
 808         if (!initializing) {
 809                 probe_hwif_init_with_fixup(hwif, fixup);
 810                 create_proc_ide_interfaces();
 811         }
 812
 813         if (hwifp)
 814                 *hwifp = hwif;
 815
 816         return (initializing || hwif->present) ? index : -1;
 817 }
 818
 819 EXPORT_SYMBOL(ide_register_hw_with_fixup);
 820
 821 int ide_register_hw(hw_regs_t *hw, ide_hwif_t **hwifp)
 822 {
 823         return ide_register_hw_with_fixup(hw, hwifp, NULL);
 824 }
 825
 826 EXPORT_SYMBOL(ide_register_hw);
 827
 828 /*
 829  *      Locks for IDE setting functionality
 830  */
 831
 832 DECLARE_MUTEX(ide_setting_sem);
 833
 834 /**
 835  *      __ide_add_setting       -       add an ide setting option
 836  *      @drive: drive to use
 837  *      @name: setting name
 838  *      @rw: true if the function is read write
 839  *      @read_ioctl: function to call on read
 840  *      @write_ioctl: function to call on write
 841  *      @data_type: type of data
 842  *      @min: range minimum
 843  *      @max: range maximum
 844  *      @mul_factor: multiplication scale
 845  *      @div_factor: divison scale
 846  *      @data: private data field
 847  *      @set: setting
 848  *      @auto_remove: setting auto removal flag
 849  *
 850  *      Removes the setting named from the device if it is present.
 851  *      The function takes the settings_lock to protect against
 852  *      parallel changes. This function must not be called from IRQ
 853  *      context. Returns 0 on success or -1 on failure.
 854  *
 855  *      BUGS: This code is seriously over-engineered. There is also
 856  *      magic about how the driver specific features are setup. If
 857  *      a driver is attached we assume the driver settings are auto
 858  *      remove.
 859  */
 860
 861 static int __ide_add_setting(ide_drive_t *drive, const char *name, int rw, int read_ioctl, int write_ioctl, int data_type, int min, int max, int mul_factor, int div_factor, void *data, ide_procset_t *set, int auto_remove)
 862 {
 863         ide_settings_t **p = (ide_settings_t **) &drive->settings, *setting = NULL;
 864
 865         down(&ide_setting_sem);
 866         while ((*p) && strcmp((*p)->name, name) < 0)
 867                 p = &((*p)->next);
 868         if ((setting = kzalloc(sizeof(*setting), GFP_KERNEL)) == NULL)
 869                 goto abort;
 870         if ((setting->name = kmalloc(strlen(name) + 1, GFP_KERNEL)) == NULL)
 871                 goto abort;
 872         strcpy(setting->name, name);
 873         setting->rw = rw;
 874         setting->read_ioctl = read_ioctl;
 875         setting->write_ioctl = write_ioctl;
 876         setting->data_type = data_type;
 877         setting->min = min;
 878         setting->max = max;
 879         setting->mul_factor = mul_factor;
 880         setting->div_factor = div_factor;
 881         setting->data = data;
 882         setting->set = set;
 883
 884         setting->next = *p;
 885         if (auto_remove)
 886                 setting->auto_remove = 1;
 887         *p = setting;
 888         up(&ide_setting_sem);
 889         return 0;
 890 abort:
 891         up(&ide_setting_sem);
 892         kfree(setting);
 893         return -1;
 894 }
 895
 896 int ide_add_setting(ide_drive_t *drive, const char *name, int rw, int read_ioctl, int write_ioctl, int data_type, int min, int max, int mul_factor, int div_factor, void *data, ide_procset_t *set)
 897 {
 898         return __ide_add_setting(drive, name, rw, read_ioctl, write_ioctl, data_type, min, max, mul_factor, div_factor, data, set, 1);
 899 }
 900
 901 EXPORT_SYMBOL(ide_add_setting);
 902
 903 /**
 904  *      __ide_remove_setting    -       remove an ide setting option
 905  *      @drive: drive to use
 906  *      @name: setting name
 907  *
 908  *      Removes the setting named from the device if it is present.
 909  *      The caller must hold the setting semaphore.
 910  */
 911
 912 static void __ide_remove_setting (ide_drive_t *drive, char *name)
 913 {
 914         ide_settings_t **p, *setting;
 915
 916         p = (ide_settings_t **) &drive->settings;
 917
 918         while ((*p) && strcmp((*p)->name, name))
 919                 p = &((*p)->next);
 920         if ((setting = (*p)) == NULL)
 921                 return;
 922
 923         (*p) = setting->next;
 924
 925         kfree(setting->name);
 926         kfree(setting);
 927 }
 928
 929 /**
 930  *      ide_find_setting_by_ioctl       -       find a drive specific ioctl
 931  *      @drive: drive to scan
 932  *      @cmd: ioctl command to handle
 933  *
 934  *      Scan's the device setting table for a matching entry and returns
 935  *      this or NULL if no entry is found. The caller must hold the
 936  *      setting semaphore
 937  */
 938
 939 static ide_settings_t *ide_find_setting_by_ioctl (ide_drive_t *drive, int cmd)
 940 {
 941         ide_settings_t *setting = drive->settings;
 942
 943         while (setting) {
 944                 if (setting->read_ioctl == cmd || setting->write_ioctl == cmd)
 945                         break;
 946                 setting = setting->next;
 947         }
 948
 949         return setting;
 950 }
 951
 952 /**
 953  *      ide_find_setting_by_name        -       find a drive specific setting
 954  *      @drive: drive to scan
 955  *      @name: setting name
 956  *
 957  *      Scan's the device setting table for a matching entry and returns
 958  *      this or NULL if no entry is found. The caller must hold the
 959  *      setting semaphore
 960  */
 961
 962 ide_settings_t *ide_find_setting_by_name (ide_drive_t *drive, char *name)
 963 {
 964         ide_settings_t *setting = drive->settings;
 965
 966         while (setting) {
 967                 if (strcmp(setting->name, name) == 0)
 968                         break;
 969                 setting = setting->next;
 970         }
 971         return setting;
 972 }
 973
 974 /**
 975  *      auto_remove_settings    -       remove driver specific settings
 976  *      @drive: drive
 977  *
 978  *      Automatically remove all the driver specific settings for this
 979  *      drive. This function may sleep and must not be called from IRQ
 980  *      context. The caller must hold ide_setting_sem.
 981  */
 982
 983 static void auto_remove_settings (ide_drive_t *drive)
 984 {
 985         ide_settings_t *setting;
 986 repeat:
 987         setting = drive->settings;
 988         while (setting) {
 989                 if (setting->auto_remove) {
 990                         __ide_remove_setting(drive, setting->name);
 991                         goto repeat;
 992                 }
 993                 setting = setting->next;
 994         }
 995 }
 996
 997 /**
 998  *      ide_read_setting        -       read an IDE setting
 999  *      @drive: drive to read from
1000  *      @setting: drive setting
1001  *
1002  *      Read a drive setting and return the value. The caller
1003  *      must hold the ide_setting_sem when making this call.
1004  *
1005  *      BUGS: the data return and error are the same return value
1006  *      so an error -EINVAL and true return of the same value cannot
1007  *      be told apart
1008  */
1009
1010 int ide_read_setting (ide_drive_t *drive, ide_settings_t *setting)
1011 {
1012         int             val = -EINVAL;
1013         unsigned long   flags;
1014
1015         if ((setting->rw & SETTING_READ)) {
1016                 spin_lock_irqsave(&ide_lock, flags);
1017                 switch(setting->data_type) {
1018                         case TYPE_BYTE:
1019                                 val = *((u8 *) setting->data);
1020                                 break;
1021                         case TYPE_SHORT:
1022                                 val = *((u16 *) setting->data);
1023                                 break;
1024                         case TYPE_INT:
1025                         case TYPE_INTA:
1026                                 val = *((u32 *) setting->data);
1027                                 break;
1028                 }
1029                 spin_unlock_irqrestore(&ide_lock, flags);
1030         }
1031         return val;
1032 }
1033
1034 /**
1035  *      ide_spin_wait_hwgroup   -       wait for group
1036  *      @drive: drive in the group
1037  *
1038  *      Wait for an IDE device group to go non busy and then return
1039  *      holding the ide_lock which guards the hwgroup->busy status
1040  *      and right to use it.
1041  */
1042
1043 int ide_spin_wait_hwgroup (ide_drive_t *drive)
1044 {
1045         ide_hwgroup_t *hwgroup = HWGROUP(drive);
1046         unsigned long timeout = jiffies + (3 * HZ);
1047
1048         spin_lock_irq(&ide_lock);
1049
1050         while (hwgroup->busy) {
1051                 unsigned long lflags;
1052                 spin_unlock_irq(&ide_lock);
1053                 local_irq_set(lflags);
1054                 if (time_after(jiffies, timeout)) {
1055                         local_irq_restore(lflags);
1056                         printk(KERN_ERR "%s: channel busy\n", drive->name);
1057                         return -EBUSY;
1058                 }
1059                 local_irq_restore(lflags);
1060                 spin_lock_irq(&ide_lock);
1061         }
1062         return 0;
1063 }
1064
1065 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
1066
1067 /**
1068  *      ide_write_setting       -       read an IDE setting
1069  *      @drive: drive to read from
1070  *      @setting: drive setting
1071  *      @val: value
1072  *
1073  *      Write a drive setting if it is possible. The caller
1074  *      must hold the ide_setting_sem when making this call.
1075  *
1076  *      BUGS: the data return and error are the same return value
1077  *      so an error -EINVAL and true return of the same value cannot
1078  *      be told apart
1079  *
1080  *      FIXME:  This should be changed to enqueue a special request
1081  *      to the driver to change settings, and then wait on a sema for completion.
1082  *      The current scheme of polling is kludgy, though safe enough.
1083  */
1084
1085 int ide_write_setting (ide_drive_t *drive, ide_settings_t *setting, int val)
1086 {
1087         int i;
1088         u32 *p;
1089
1090         if (!capable(CAP_SYS_ADMIN))
1091                 return -EACCES;
1092         if (!(setting->rw & SETTING_WRITE))
1093                 return -EPERM;
1094         if (val < setting->min || val > setting->max)
1095                 return -EINVAL;
1096         if (setting->set)
1097                 return setting->set(drive, val);
1098         if (ide_spin_wait_hwgroup(drive))
1099                 return -EBUSY;
1100         switch (setting->data_type) {
1101                 case TYPE_BYTE:
1102                         *((u8 *) setting->data) = val;
1103                         break;
1104                 case TYPE_SHORT:
1105                         *((u16 *) setting->data) = val;
1106                         break;
1107                 case TYPE_INT:
1108                         *((u32 *) setting->data) = val;
1109                         break;
1110                 case TYPE_INTA:
1111                         p = (u32 *) setting->data;
1112                         for (i = 0; i < 1 << PARTN_BITS; i++, p++)
1113                                 *p = val;
1114                         break;
1115         }
1116         spin_unlock_irq(&ide_lock);
1117         return 0;
1118 }
1119
1120 static int set_io_32bit(ide_drive_t *drive, int arg)
1121 {
1122         drive->io_32bit = arg;
1123 #ifdef CONFIG_BLK_DEV_DTC2278
1124         if (HWIF(drive)->chipset == ide_dtc2278)
1125                 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
1126 #endif /* CONFIG_BLK_DEV_DTC2278 */
1127         return 0;
1128 }
1129
1130 static int set_using_dma (ide_drive_t *drive, int arg)
1131 {
1132 #ifdef CONFIG_BLK_DEV_IDEDMA
1133         if (!drive->id || !(drive->id->capability & 1))
1134                 return -EPERM;
1135         if (HWIF(drive)->ide_dma_check == NULL)
1136                 return -EPERM;
1137         if (arg) {
1138                 if (HWIF(drive)->ide_dma_check(drive)) return -EIO;
1139                 if (HWIF(drive)->ide_dma_on(drive)) return -EIO;
1140         } else {
1141                 if (__ide_dma_off(drive))
1142                         return -EIO;
1143         }
1144         return 0;
1145 #else
1146         return -EPERM;
1147 #endif
1148 }
1149
1150 static int set_pio_mode (ide_drive_t *drive, int arg)
1151 {
1152         struct request rq;
1153
1154         if (!HWIF(drive)->tuneproc)
1155                 return -ENOSYS;
1156         if (drive->special.b.set_tune)
1157                 return -EBUSY;
1158         ide_init_drive_cmd(&rq);
1159         drive->tune_req = (u8) arg;
1160         drive->special.b.set_tune = 1;
1161         (void) ide_do_drive_cmd(drive, &rq, ide_wait);
1162         return 0;
1163 }
1164
1165 static int set_xfer_rate (ide_drive_t *drive, int arg)
1166 {
1167         int err = ide_wait_cmd(drive,
1168                         WIN_SETFEATURES, (u8) arg,
1169                         SETFEATURES_XFER, 0, NULL);
1170
1171         if (!err && arg) {
1172                 ide_set_xfer_rate(drive, (u8) arg);
1173                 ide_driveid_update(drive);
1174         }
1175         return err;
1176 }
1177
1178 /**
1179  *      ide_add_generic_settings        -       generic ide settings
1180  *      @drive: drive being configured
1181  *
1182  *      Add the generic parts of the system settings to the /proc files and
1183  *      ioctls for this IDE device. The caller must not be holding the
1184  *      ide_setting_sem.
1185  */
1186
1187 void ide_add_generic_settings (ide_drive_t *drive)
1188 {
1189 /*
1190  *                        drive         setting name            read/write access                               read ioctl              write ioctl             data type       min     max                             mul_factor      div_factor      data pointer                    set function
1191  */
1192         __ide_add_setting(drive,        "io_32bit",             drive->no_io_32bit ? SETTING_READ : SETTING_RW, HDIO_GET_32BIT,         HDIO_SET_32BIT,         TYPE_BYTE,      0,      1 + (SUPPORT_VLB_SYNC << 1),    1,              1,              &drive->io_32bit,               set_io_32bit,   0);
1193         __ide_add_setting(drive,        "keepsettings",         SETTING_RW,                                     HDIO_GET_KEEPSETTINGS,  HDIO_SET_KEEPSETTINGS,  TYPE_BYTE,      0,      1,                              1,              1,              &drive->keep_settings,          NULL,           0);
1194         __ide_add_setting(drive,        "nice1",                SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      1,                              1,              1,              &drive->nice1,                  NULL,           0);
1195         __ide_add_setting(drive,        "pio_mode",             SETTING_WRITE,                                  -1,                     HDIO_SET_PIO_MODE,      TYPE_BYTE,      0,      255,                            1,              1,              NULL,                           set_pio_mode,   0);
1196         __ide_add_setting(drive,        "unmaskirq",            drive->no_unmask ? SETTING_READ : SETTING_RW,   HDIO_GET_UNMASKINTR,    HDIO_SET_UNMASKINTR,    TYPE_BYTE,      0,      1,                              1,              1,              &drive->unmask,                 NULL,           0);
1197         __ide_add_setting(drive,        "using_dma",            SETTING_RW,                                     HDIO_GET_DMA,           HDIO_SET_DMA,           TYPE_BYTE,      0,      1,                              1,              1,              &drive->using_dma,              set_using_dma,  0);
1198         __ide_add_setting(drive,        "init_speed",           SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->init_speed,             NULL,           0);
1199         __ide_add_setting(drive,        "current_speed",        SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      70,                             1,              1,              &drive->current_speed,          set_xfer_rate,  0);
1200         __ide_add_setting(drive,        "number",               SETTING_RW,                                     -1,                     -1,                     TYPE_BYTE,      0,      3,                              1,              1,              &drive->dn,                     NULL,           0);
1201 }
1202
1203 /**
1204  *      system_bus_clock        -       clock guess
1205  *
1206  *      External version of the bus clock guess used by very old IDE drivers
1207  *      for things like VLB timings. Should not be used.
1208  */
1209
1210 int system_bus_clock (void)
1211 {
1212         return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
1213 }
1214
1215 EXPORT_SYMBOL(system_bus_clock);
1216
1217 static int generic_ide_suspend(struct device *dev, pm_message_t state)
1218 {
1219         ide_drive_t *drive = dev->driver_data;
1220         struct request rq;
1221         struct request_pm_state rqpm;
1222         ide_task_t args;
1223
1224         memset(&rq, 0, sizeof(rq));
1225         memset(&rqpm, 0, sizeof(rqpm));
1226         memset(&args, 0, sizeof(args));
1227         rq.flags = REQ_PM_SUSPEND;
1228         rq.special = &args;
1229         rq.pm = &rqpm;
1230         rqpm.pm_step = ide_pm_state_start_suspend;
1231         rqpm.pm_state = state.event;
1232
1233         return ide_do_drive_cmd(drive, &rq, ide_wait);
1234 }
1235
1236 static int generic_ide_resume(struct device *dev)
1237 {
1238         ide_drive_t *drive = dev->driver_data;
1239         struct request rq;
1240         struct request_pm_state rqpm;
1241         ide_task_t args;
1242
1243         memset(&rq, 0, sizeof(rq));
1244         memset(&rqpm, 0, sizeof(rqpm));
1245         memset(&args, 0, sizeof(args));
1246         rq.flags = REQ_PM_RESUME;
1247         rq.special = &args;
1248         rq.pm = &rqpm;
1249         rqpm.pm_step = ide_pm_state_start_resume;
1250         rqpm.pm_state = PM_EVENT_ON;
1251
1252         return ide_do_drive_cmd(drive, &rq, ide_head_wait);
1253 }
1254
1255 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
1256                         unsigned int cmd, unsigned long arg)
1257 {
1258         ide_settings_t *setting;
1259         ide_driver_t *drv;
1260         int err = 0;
1261         void __user *p = (void __user *)arg;
1262
1263         down(&ide_setting_sem);
1264         if ((setting = ide_find_setting_by_ioctl(drive, cmd)) != NULL) {
1265                 if (cmd == setting->read_ioctl) {
1266                         err = ide_read_setting(drive, setting);
1267                         up(&ide_setting_sem);
1268                         return err >= 0 ? put_user(err, (long __user *)arg) : err;
1269                 } else {
1270                         if (bdev != bdev->bd_contains)
1271                                 err = -EINVAL;
1272                         else
1273                                 err = ide_write_setting(drive, setting, arg);
1274                         up(&ide_setting_sem);
1275                         return err;
1276                 }
1277         }
1278         up(&ide_setting_sem);
1279
1280         switch (cmd) {
1281                 case HDIO_OBSOLETE_IDENTITY:
1282                 case HDIO_GET_IDENTITY:
1283                         if (bdev != bdev->bd_contains)
1284                                 return -EINVAL;
1285                         if (drive->id_read == 0)
1286                                 return -ENOMSG;
1287                         if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1288                                 return -EFAULT;
1289                         return 0;
1290
1291                 case HDIO_GET_NICE:
1292                         return put_user(drive->dsc_overlap      <<      IDE_NICE_DSC_OVERLAP    |
1293                                         drive->atapi_overlap    <<      IDE_NICE_ATAPI_OVERLAP  |
1294                                         drive->nice0            <<      IDE_NICE_0              |
1295                                         drive->nice1            <<      IDE_NICE_1              |
1296                                         drive->nice2            <<      IDE_NICE_2,
1297                                         (long __user *) arg);
1298
1299 #ifdef CONFIG_IDE_TASK_IOCTL
1300                 case HDIO_DRIVE_TASKFILE:
1301                         if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1302                                 return -EACCES;
1303                         switch(drive->media) {
1304                                 case ide_disk:
1305                                         return ide_taskfile_ioctl(drive, cmd, arg);
1306                                 default:
1307                                         return -ENOMSG;
1308                         }
1309 #endif /* CONFIG_IDE_TASK_IOCTL */
1310
1311                 case HDIO_DRIVE_CMD:
1312                         if (!capable(CAP_SYS_RAWIO))
1313                                 return -EACCES;
1314                         return ide_cmd_ioctl(drive, cmd, arg);
1315
1316                 case HDIO_DRIVE_TASK:
1317                         if (!capable(CAP_SYS_RAWIO))
1318                                 return -EACCES;
1319                         return ide_task_ioctl(drive, cmd, arg);
1320
1321                 case HDIO_SCAN_HWIF:
1322                 {
1323                         hw_regs_t hw;
1324                         int args[3];
1325                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1326                         if (copy_from_user(args, p, 3 * sizeof(int)))
1327                                 return -EFAULT;
1328                         memset(&hw, 0, sizeof(hw));
1329                         ide_init_hwif_ports(&hw, (unsigned long) args[0],
1330                                             (unsigned long) args[1], NULL);
1331                         hw.irq = args[2];
1332                         if (ide_register_hw(&hw, NULL) == -1)
1333                                 return -EIO;
1334                         return 0;
1335                 }
1336                 case HDIO_UNREGISTER_HWIF:
1337                         if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1338                         /* (arg > MAX_HWIFS) checked in function */
1339                         ide_unregister(arg);
1340                         return 0;
1341                 case HDIO_SET_NICE:
1342                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1343                         if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1344                                 return -EPERM;
1345                         drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1346                         drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1347                         if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1348                                 drive->dsc_overlap = 0;
1349                                 return -EPERM;
1350                         }
1351                         drive->nice1 = (arg >> IDE_NICE_1) & 1;
1352                         return 0;
1353                 case HDIO_DRIVE_RESET:
1354                 {
1355                         unsigned long flags;
1356                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1357
1358                         /*
1359                          *      Abort the current command on the
1360                          *      group if there is one, taking
1361                          *      care not to allow anything else
1362                          *      to be queued and to die on the
1363                          *      spot if we miss one somehow
1364                          */
1365
1366                         spin_lock_irqsave(&ide_lock, flags);
1367
1368                         ide_abort(drive, "drive reset");
1369
1370                         if(HWGROUP(drive)->handler)
1371                                 BUG();
1372
1373                         /* Ensure nothing gets queued after we
1374                            drop the lock. Reset will clear the busy */
1375
1376                         HWGROUP(drive)->busy = 1;
1377                         spin_unlock_irqrestore(&ide_lock, flags);
1378                         (void) ide_do_reset(drive);
1379
1380                         return 0;
1381                 }
1382
1383                 case CDROMEJECT:
1384                 case CDROMCLOSETRAY:
1385                         return scsi_cmd_ioctl(file, bdev->bd_disk, cmd, p);
1386
1387                 case HDIO_GET_BUSSTATE:
1388                         if (!capable(CAP_SYS_ADMIN))
1389                                 return -EACCES;
1390                         if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1391                                 return -EFAULT;
1392                         return 0;
1393
1394                 case HDIO_SET_BUSSTATE:
1395                         if (!capable(CAP_SYS_ADMIN))
1396                                 return -EACCES;
1397                         if (HWIF(drive)->busproc)
1398                                 return HWIF(drive)->busproc(drive, (int)arg);
1399                         return -EOPNOTSUPP;
1400                 default:
1401                         return -EINVAL;
1402         }
1403 }
1404
1405 EXPORT_SYMBOL(generic_ide_ioctl);
1406
1407 /*
1408  * stridx() returns the offset of c within s,
1409  * or -1 if c is '\0' or not found within s.
1410  */
1411 static int __init stridx (const char *s, char c)
1412 {
1413         char *i = strchr(s, c);
1414         return (i && c) ? i - s : -1;
1415 }
1416
1417 /*
1418  * match_parm() does parsing for ide_setup():
1419  *
1420  * 1. the first char of s must be '='.
1421  * 2. if the remainder matches one of the supplied keywords,
1422  *     the index (1 based) of the keyword is negated and returned.
1423  * 3. if the remainder is a series of no more than max_vals numbers
1424  *     separated by commas, the numbers are saved in vals[] and a
1425  *     count of how many were saved is returned.  Base10 is assumed,
1426  *     and base16 is allowed when prefixed with "0x".
1427  * 4. otherwise, zero is returned.
1428  */
1429 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1430 {
1431         static const char *decimal = "0123456789";
1432         static const char *hex = "0123456789abcdef";
1433         int i, n;
1434
1435         if (*s++ == '=') {
1436                 /*
1437                  * Try matching against the supplied keywords,
1438                  * and return -(index+1) if we match one
1439                  */
1440                 if (keywords != NULL) {
1441                         for (i = 0; *keywords != NULL; ++i) {
1442                                 if (!strcmp(s, *keywords++))
1443                                         return -(i+1);
1444                         }
1445                 }
1446                 /*
1447                  * Look for a series of no more than "max_vals"
1448                  * numeric values separated by commas, in base10,
1449                  * or base16 when prefixed with "0x".
1450                  * Return a count of how many were found.
1451                  */
1452                 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1453                         vals[n] = i;
1454                         while ((i = stridx(decimal, *++s)) >= 0)
1455                                 vals[n] = (vals[n] * 10) + i;
1456                         if (*s == 'x' && !vals[n]) {
1457                                 while ((i = stridx(hex, *++s)) >= 0)
1458                                         vals[n] = (vals[n] * 0x10) + i;
1459                         }
1460                         if (++n == max_vals)
1461                                 break;
1462                         if (*s == ',' || *s == ';')
1463                                 ++s;
1464                 }
1465                 if (!*s)
1466                         return n;
1467         }
1468         return 0;       /* zero = nothing matched */
1469 }
1470
1471 #ifdef CONFIG_BLK_DEV_ALI14XX
1472 static int __initdata probe_ali14xx;
1473 extern int ali14xx_init(void);
1474 #endif
1475 #ifdef CONFIG_BLK_DEV_UMC8672
1476 static int __initdata probe_umc8672;
1477 extern int umc8672_init(void);
1478 #endif
1479 #ifdef CONFIG_BLK_DEV_DTC2278
1480 static int __initdata probe_dtc2278;
1481 extern int dtc2278_init(void);
1482 #endif
1483 #ifdef CONFIG_BLK_DEV_HT6560B
1484 static int __initdata probe_ht6560b;
1485 extern int ht6560b_init(void);
1486 #endif
1487 #ifdef CONFIG_BLK_DEV_QD65XX
1488 static int __initdata probe_qd65xx;
1489 extern int qd65xx_init(void);
1490 #endif
1491
1492 static int __initdata is_chipset_set[MAX_HWIFS];
1493
1494 /*
1495  * ide_setup() gets called VERY EARLY during initialization,
1496  * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1497  *
1498  * Remember to update Documentation/ide.txt if you change something here.
1499  */
1500 static int __init ide_setup(char *s)
1501 {
1502         int i, vals[3];
1503         ide_hwif_t *hwif;
1504         ide_drive_t *drive;
1505         unsigned int hw, unit;
1506         const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1507         const char max_hwif  = '0' + (MAX_HWIFS - 1);
1508
1509
1510         if (strncmp(s,"hd",2) == 0 && s[2] == '=')      /* hd= is for hd.c   */
1511                 return 0;                               /* driver and not us */
1512
1513         if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1514                 return 0;
1515
1516         printk(KERN_INFO "ide_setup: %s", s);
1517         init_ide_data ();
1518
1519 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1520         if (!strcmp(s, "ide=doubler")) {
1521                 extern int ide_doubler;
1522
1523                 printk(" : Enabled support for IDE doublers\n");
1524                 ide_doubler = 1;
1525                 return 1;
1526         }
1527 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1528
1529         if (!strcmp(s, "ide=nodma")) {
1530                 printk(" : Prevented DMA\n");
1531                 noautodma = 1;
1532                 return 1;
1533         }
1534
1535 #ifdef CONFIG_BLK_DEV_IDEPCI
1536         if (!strcmp(s, "ide=reverse")) {
1537                 ide_scan_direction = 1;
1538                 printk(" : Enabled support for IDE inverse scan order.\n");
1539                 return 1;
1540         }
1541 #endif /* CONFIG_BLK_DEV_IDEPCI */
1542
1543         /*
1544          * Look for drive options:  "hdx="
1545          */
1546         if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1547                 const char *hd_words[] = {
1548                         "none", "noprobe", "nowerr", "cdrom", "serialize",
1549                         "autotune", "noautotune", "minus8", "swapdata", "bswap",
1550                         "minus11", "remap", "remap63", "scsi", NULL };
1551                 unit = s[2] - 'a';
1552                 hw   = unit / MAX_DRIVES;
1553                 unit = unit % MAX_DRIVES;
1554                 hwif = &ide_hwifs[hw];
1555                 drive = &hwif->drives[unit];
1556                 if (strncmp(s + 4, "ide-", 4) == 0) {
1557                         strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1558                         goto done;
1559                 }
1560                 switch (match_parm(&s[3], hd_words, vals, 3)) {
1561                         case -1: /* "none" */
1562                         case -2: /* "noprobe" */
1563                                 drive->noprobe = 1;
1564                                 goto done;
1565                         case -3: /* "nowerr" */
1566                                 drive->bad_wstat = BAD_R_STAT;
1567                                 hwif->noprobe = 0;
1568                                 goto done;
1569                         case -4: /* "cdrom" */
1570                                 drive->present = 1;
1571                                 drive->media = ide_cdrom;
1572                                 /* an ATAPI device ignores DRDY */
1573                                 drive->ready_stat = 0;
1574                                 hwif->noprobe = 0;
1575                                 goto done;
1576                         case -5: /* "serialize" */
1577                                 printk(" -- USE \"ide%d=serialize\" INSTEAD", hw);
1578                                 goto do_serialize;
1579                         case -6: /* "autotune" */
1580                                 drive->autotune = IDE_TUNE_AUTO;
1581                                 goto obsolete_option;
1582                         case -7: /* "noautotune" */
1583                                 drive->autotune = IDE_TUNE_NOAUTO;
1584                                 goto obsolete_option;
1585                         case -9: /* "swapdata" */
1586                         case -10: /* "bswap" */
1587                                 drive->bswap = 1;
1588                                 goto done;
1589                         case -12: /* "remap" */
1590                                 drive->remap_0_to_1 = 1;
1591                                 goto done;
1592                         case -13: /* "remap63" */
1593                                 drive->sect0 = 63;
1594                                 goto done;
1595                         case -14: /* "scsi" */
1596                                 drive->scsi = 1;
1597                                 goto done;
1598                         case 3: /* cyl,head,sect */
1599                                 drive->media    = ide_disk;
1600                                 drive->ready_stat = READY_STAT;
1601                                 drive->cyl      = drive->bios_cyl  = vals[0];
1602                                 drive->head     = drive->bios_head = vals[1];
1603                                 drive->sect     = drive->bios_sect = vals[2];
1604                                 drive->present  = 1;
1605                                 drive->forced_geom = 1;
1606                                 hwif->noprobe = 0;
1607                                 goto done;
1608                         default:
1609                                 goto bad_option;
1610                 }
1611         }
1612
1613         if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1614                 goto bad_option;
1615         /*
1616          * Look for bus speed option:  "idebus="
1617          */
1618         if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1619                 if (match_parm(&s[6], NULL, vals, 1) != 1)
1620                         goto bad_option;
1621                 if (vals[0] >= 20 && vals[0] <= 66) {
1622                         idebus_parameter = vals[0];
1623                 } else
1624                         printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1625                 goto done;
1626         }
1627         /*
1628          * Look for interface options:  "idex="
1629          */
1630         if (s[3] >= '0' && s[3] <= max_hwif) {
1631                 /*
1632                  * Be VERY CAREFUL changing this: note hardcoded indexes below
1633                  * (-8, -9, -10) are reserved to ease the hardcoding.
1634                  */
1635                 static const char *ide_words[] = {
1636                         "noprobe", "serialize", "autotune", "noautotune",
1637                         "reset", "dma", "ata66", "minus8", "minus9",
1638                         "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1639                         "dtc2278", "umc8672", "ali14xx", NULL };
1640                 hw = s[3] - '0';
1641                 hwif = &ide_hwifs[hw];
1642                 i = match_parm(&s[4], ide_words, vals, 3);
1643
1644                 /*
1645                  * Cryptic check to ensure chipset not already set for hwif.
1646                  * Note: we can't depend on hwif->chipset here.
1647                  */
1648                 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1649                         /* chipset already specified */
1650                         if (is_chipset_set[hw])
1651                                 goto bad_option;
1652                         if (i > -18 && i <= -11) {
1653                                 /* these drivers are for "ide0=" only */
1654                                 if (hw != 0)
1655                                         goto bad_hwif;
1656                                 /* chipset already specified for 2nd port */
1657                                 if (is_chipset_set[hw+1])
1658                                         goto bad_option;
1659                         }
1660                         is_chipset_set[hw] = 1;
1661                         printk("\n");
1662                 }
1663
1664                 switch (i) {
1665 #ifdef CONFIG_BLK_DEV_ALI14XX
1666                         case -17: /* "ali14xx" */
1667                                 probe_ali14xx = 1;
1668                                 goto done;
1669 #endif
1670 #ifdef CONFIG_BLK_DEV_UMC8672
1671                         case -16: /* "umc8672" */
1672                                 probe_umc8672 = 1;
1673                                 goto done;
1674 #endif
1675 #ifdef CONFIG_BLK_DEV_DTC2278
1676                         case -15: /* "dtc2278" */
1677                                 probe_dtc2278 = 1;
1678                                 goto done;
1679 #endif
1680 #ifdef CONFIG_BLK_DEV_CMD640
1681                         case -14: /* "cmd640_vlb" */
1682                         {
1683                                 extern int cmd640_vlb; /* flag for cmd640.c */
1684                                 cmd640_vlb = 1;
1685                                 goto done;
1686                         }
1687 #endif
1688 #ifdef CONFIG_BLK_DEV_HT6560B
1689                         case -13: /* "ht6560b" */
1690                                 probe_ht6560b = 1;
1691                                 goto done;
1692 #endif
1693 #ifdef CONFIG_BLK_DEV_QD65XX
1694                         case -12: /* "qd65xx" */
1695                                 probe_qd65xx = 1;
1696                                 goto done;
1697 #endif
1698 #ifdef CONFIG_BLK_DEV_4DRIVES
1699                         case -11: /* "four" drives on one set of ports */
1700                         {
1701                                 ide_hwif_t *mate = &ide_hwifs[hw^1];
1702                                 mate->drives[0].select.all ^= 0x20;
1703                                 mate->drives[1].select.all ^= 0x20;
1704                                 hwif->chipset = mate->chipset = ide_4drives;
1705                                 mate->irq = hwif->irq;
1706                                 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1707                                 goto do_serialize;
1708                         }
1709 #endif /* CONFIG_BLK_DEV_4DRIVES */
1710                         case -10: /* minus10 */
1711                         case -9: /* minus9 */
1712                         case -8: /* minus8 */
1713                                 goto bad_option;
1714                         case -7: /* ata66 */
1715 #ifdef CONFIG_BLK_DEV_IDEPCI
1716                                 hwif->udma_four = 1;
1717                                 goto obsolete_option;
1718 #else
1719                                 goto bad_hwif;
1720 #endif
1721                         case -6: /* dma */
1722                                 hwif->autodma = 1;
1723                                 goto obsolete_option;
1724                         case -5: /* "reset" */
1725                                 hwif->reset = 1;
1726                                 goto obsolete_option;
1727                         case -4: /* "noautotune" */
1728                                 hwif->drives[0].autotune = IDE_TUNE_NOAUTO;
1729                                 hwif->drives[1].autotune = IDE_TUNE_NOAUTO;
1730                                 goto obsolete_option;
1731                         case -3: /* "autotune" */
1732                                 hwif->drives[0].autotune = IDE_TUNE_AUTO;
1733                                 hwif->drives[1].autotune = IDE_TUNE_AUTO;
1734                                 goto obsolete_option;
1735                         case -2: /* "serialize" */
1736                         do_serialize:
1737                                 hwif->mate = &ide_hwifs[hw^1];
1738                                 hwif->mate->mate = hwif;
1739                                 hwif->serialized = hwif->mate->serialized = 1;
1740                                 goto obsolete_option;
1741
1742                         case -1: /* "noprobe" */
1743                                 hwif->noprobe = 1;
1744                                 goto done;
1745
1746                         case 1: /* base */
1747                                 vals[1] = vals[0] + 0x206; /* default ctl */
1748                         case 2: /* base,ctl */
1749                                 vals[2] = 0;    /* default irq = probe for it */
1750                         case 3: /* base,ctl,irq */
1751                                 hwif->hw.irq = vals[2];
1752                                 ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq);
1753                                 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
1754                                 hwif->irq      = vals[2];
1755                                 hwif->noprobe  = 0;
1756                                 hwif->chipset  = ide_forced;
1757                                 goto obsolete_option;
1758
1759                         case 0: goto bad_option;
1760                         default:
1761                                 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1762                                 return 1;
1763                 }
1764         }
1765 bad_option:
1766         printk(" -- BAD OPTION\n");
1767         return 1;
1768 obsolete_option:
1769         printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1770         return 1;
1771 bad_hwif:
1772         printk("-- NOT SUPPORTED ON ide%d", hw);
1773 done:
1774         printk("\n");
1775         return 1;
1776 }
1777
1778 extern void pnpide_init(void);
1779 extern void h8300_ide_init(void);
1780
1781 /*
1782  * probe_for_hwifs() finds/initializes "known" IDE interfaces
1783  */
1784 static void __init probe_for_hwifs (void)
1785 {
1786 #ifdef CONFIG_BLK_DEV_IDEPCI
1787         ide_scan_pcibus(ide_scan_direction);
1788 #endif /* CONFIG_BLK_DEV_IDEPCI */
1789
1790 #ifdef CONFIG_ETRAX_IDE
1791         {
1792                 extern void init_e100_ide(void);
1793                 init_e100_ide();
1794         }
1795 #endif /* CONFIG_ETRAX_IDE */
1796 #ifdef CONFIG_BLK_DEV_CMD640
1797         {
1798                 extern void ide_probe_for_cmd640x(void);
1799                 ide_probe_for_cmd640x();
1800         }
1801 #endif /* CONFIG_BLK_DEV_CMD640 */
1802 #ifdef CONFIG_BLK_DEV_IDE_PMAC
1803         {
1804                 extern void pmac_ide_probe(void);
1805                 pmac_ide_probe();
1806         }
1807 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
1808 #ifdef CONFIG_BLK_DEV_GAYLE
1809         {
1810                 extern void gayle_init(void);
1811                 gayle_init();
1812         }
1813 #endif /* CONFIG_BLK_DEV_GAYLE */
1814 #ifdef CONFIG_BLK_DEV_FALCON_IDE
1815         {
1816                 extern void falconide_init(void);
1817                 falconide_init();
1818         }
1819 #endif /* CONFIG_BLK_DEV_FALCON_IDE */
1820 #ifdef CONFIG_BLK_DEV_MAC_IDE
1821         {
1822                 extern void macide_init(void);
1823                 macide_init();
1824         }
1825 #endif /* CONFIG_BLK_DEV_MAC_IDE */
1826 #ifdef CONFIG_BLK_DEV_Q40IDE
1827         {
1828                 extern void q40ide_init(void);
1829                 q40ide_init();
1830         }
1831 #endif /* CONFIG_BLK_DEV_Q40IDE */
1832 #ifdef CONFIG_BLK_DEV_BUDDHA
1833         {
1834                 extern void buddha_init(void);
1835                 buddha_init();
1836         }
1837 #endif /* CONFIG_BLK_DEV_BUDDHA */
1838 #ifdef CONFIG_BLK_DEV_IDEPNP
1839         pnpide_init();
1840 #endif
1841 #ifdef CONFIG_H8300
1842         h8300_ide_init();
1843 #endif
1844 }
1845
1846 void ide_register_subdriver(ide_drive_t *drive, ide_driver_t *driver)
1847 {
1848 #ifdef CONFIG_PROC_FS
1849         ide_add_proc_entries(drive->proc, driver->proc, drive);
1850 #endif
1851 }
1852
1853 EXPORT_SYMBOL(ide_register_subdriver);
1854
1855 /**
1856  *      ide_unregister_subdriver        -       disconnect drive from driver
1857  *      @drive: drive to unplug
1858  *      @driver: driver
1859  *
1860  *      Disconnect a drive from the driver it was attached to and then
1861  *      clean up the various proc files and other objects attached to it.
1862  *
1863  *      Takes ide_setting_sem and ide_lock.
1864  *      Caller must hold none of the locks.
1865  */
1866
1867 void ide_unregister_subdriver(ide_drive_t *drive, ide_driver_t *driver)
1868 {
1869         unsigned long flags;
1870
1871         down(&ide_setting_sem);
1872         spin_lock_irqsave(&ide_lock, flags);
1873 #ifdef CONFIG_PROC_FS
1874         ide_remove_proc_entries(drive->proc, driver->proc);
1875 #endif
1876         auto_remove_settings(drive);
1877         spin_unlock_irqrestore(&ide_lock, flags);
1878         up(&ide_setting_sem);
1879 }
1880
1881 EXPORT_SYMBOL(ide_unregister_subdriver);
1882
1883 /*
1884  * Probe module
1885  */
1886
1887 EXPORT_SYMBOL(ide_lock);
1888
1889 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1890 {
1891         return 1;
1892 }
1893
1894 static char *media_string(ide_drive_t *drive)
1895 {
1896         switch (drive->media) {
1897         case ide_disk:
1898                 return "disk";
1899         case ide_cdrom:
1900                 return "cdrom";
1901         case ide_tape:
1902                 return "tape";
1903         case ide_floppy:
1904                 return "floppy";
1905         default:
1906                 return "UNKNOWN";
1907         }
1908 }
1909
1910 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1911 {
1912         ide_drive_t *drive = to_ide_device(dev);
1913         return sprintf(buf, "%s\n", media_string(drive));
1914 }
1915
1916 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1917 {
1918         ide_drive_t *drive = to_ide_device(dev);
1919         return sprintf(buf, "%s\n", drive->name);
1920 }
1921
1922 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1923 {
1924         ide_drive_t *drive = to_ide_device(dev);
1925         return sprintf(buf, "ide:m-%s\n", media_string(drive));
1926 }
1927
1928 static struct device_attribute ide_dev_attrs[] = {
1929         __ATTR_RO(media),
1930         __ATTR_RO(drivename),
1931         __ATTR_RO(modalias),
1932         __ATTR_NULL
1933 };
1934
1935 static int ide_uevent(struct device *dev, char **envp, int num_envp,
1936                       char *buffer, int buffer_size)
1937 {
1938         ide_drive_t *drive = to_ide_device(dev);
1939         int i = 0;
1940         int length = 0;
1941
1942         add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1943                        "MEDIA=%s", media_string(drive));
1944         add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1945                        "DRIVENAME=%s", drive->name);
1946         add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
1947                        "MODALIAS=ide:m-%s", media_string(drive));
1948         envp[i] = NULL;
1949         return 0;
1950 }
1951
1952 static int generic_ide_probe(struct device *dev)
1953 {
1954         ide_drive_t *drive = to_ide_device(dev);
1955         ide_driver_t *drv = to_ide_driver(dev->driver);
1956
1957         return drv->probe ? drv->probe(drive) : -ENODEV;
1958 }
1959
1960 static int generic_ide_remove(struct device *dev)
1961 {
1962         ide_drive_t *drive = to_ide_device(dev);
1963         ide_driver_t *drv = to_ide_driver(dev->driver);
1964
1965         if (drv->remove)
1966                 drv->remove(drive);
1967
1968         return 0;
1969 }
1970
1971 static void generic_ide_shutdown(struct device *dev)
1972 {
1973         ide_drive_t *drive = to_ide_device(dev);
1974         ide_driver_t *drv = to_ide_driver(dev->driver);
1975
1976         if (dev->driver && drv->shutdown)
1977                 drv->shutdown(drive);
1978 }
1979
1980 struct bus_type ide_bus_type = {
1981         .name           = "ide",
1982         .match          = ide_bus_match,
1983         .uevent         = ide_uevent,
1984         .probe          = generic_ide_probe,
1985         .remove         = generic_ide_remove,
1986         .shutdown       = generic_ide_shutdown,
1987         .dev_attrs      = ide_dev_attrs,
1988         .suspend        = generic_ide_suspend,
1989         .resume         = generic_ide_resume,
1990 };
1991
1992 EXPORT_SYMBOL_GPL(ide_bus_type);
1993
1994 /*
1995  * This is gets invoked once during initialization, to set *everything* up
1996  */
1997 static int __init ide_init(void)
1998 {
1999         printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
2000         devfs_mk_dir("ide");
2001         system_bus_speed = ide_system_bus_speed();
2002
2003         bus_register(&ide_bus_type);
2004
2005         init_ide_data();
2006
2007 #ifdef CONFIG_PROC_FS
2008         proc_ide_root = proc_mkdir("ide", NULL);
2009 #endif
2010
2011 #ifdef CONFIG_BLK_DEV_ALI14XX
2012         if (probe_ali14xx)
2013                 (void)ali14xx_init();
2014 #endif
2015 #ifdef CONFIG_BLK_DEV_UMC8672
2016         if (probe_umc8672)
2017                 (void)umc8672_init();
2018 #endif
2019 #ifdef CONFIG_BLK_DEV_DTC2278
2020         if (probe_dtc2278)
2021                 (void)dtc2278_init();
2022 #endif
2023 #ifdef CONFIG_BLK_DEV_HT6560B
2024         if (probe_ht6560b)
2025                 (void)ht6560b_init();
2026 #endif
2027 #ifdef CONFIG_BLK_DEV_QD65XX
2028         if (probe_qd65xx)
2029                 (void)qd65xx_init();
2030 #endif
2031
2032         initializing = 1;
2033         /* Probe for special PCI and other "known" interface chipsets. */
2034         probe_for_hwifs();
2035         initializing = 0;
2036
2037 #ifdef CONFIG_PROC_FS
2038         proc_ide_create();
2039 #endif
2040         return 0;
2041 }
2042
2043 #ifdef MODULE
2044 static char *options = NULL;
2045 module_param(options, charp, 0);
2046 MODULE_LICENSE("GPL");
2047
2048 static void __init parse_options (char *line)
2049 {
2050         char *next = line;
2051
2052         if (line == NULL || !*line)
2053                 return;
2054         while ((line = next) != NULL) {
2055                 if ((next = strchr(line,' ')) != NULL)
2056                         *next++ = 0;
2057                 if (!ide_setup(line))
2058                         printk (KERN_INFO "Unknown option '%s'\n", line);
2059         }
2060 }
2061
2062 int init_module (void)
2063 {
2064         parse_options(options);
2065         return ide_init();
2066 }
2067
2068 void cleanup_module (void)
2069 {
2070         int index;
2071
2072         for (index = 0; index < MAX_HWIFS; ++index)
2073                 ide_unregister(index);
2074
2075 #ifdef CONFIG_PROC_FS
2076         proc_ide_destroy();
2077 #endif
2078         devfs_remove("ide");
2079
2080         bus_unregister(&ide_bus_type);
2081 }
2082
2083 #else /* !MODULE */
2084
2085 __setup("", ide_setup);
2086
2087 module_init(ide_init);
2088
2089 #endif /* MODULE */