ide.c revision a885c8c4316e1c1d2d2c8755da3f3d14f852528d
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 167static 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 173static int idebus_parameter; /* holds the "idebus=" parameter */ 174static int system_bus_speed; /* holds what we think is VESA/PCI bus speed */ 175static int initializing; /* set while initializing built-in drivers */ 176 177DECLARE_MUTEX(ide_cfg_sem); 178 __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock); 179 180#ifdef CONFIG_BLK_DEV_IDEPCI 181static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */ 182#endif 183 184#ifdef CONFIG_IDEDMA_AUTO 185int noautodma = 0; 186#else 187int noautodma = 1; 188#endif 189 190EXPORT_SYMBOL(noautodma); 191 192/* 193 * This is declared extern in ide.h, for access by other IDE modules: 194 */ 195ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */ 196 197EXPORT_SYMBOL(ide_hwifs); 198 199/* 200 * Do not even *think* about calling this! 201 */ 202static 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 sema_init(&hwif->gendev_rel_sem, 0); 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 sema_init(&drive->gendev_rel_sem, 0); 249 } 250} 251 252static 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 270extern 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 290static 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 330static 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 360struct proc_dir_entry *proc_ide_root; 361#endif 362 363static 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 384int 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 413data_region_busy: 414 addr = hwif->io_ports[IDE_CONTROL_OFFSET]; 415 if (addr) 416 release_region(addr, 1); 417control_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 434void 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 460static 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 577void 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 down(&drive->gendev_rel_sem); 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 down(&hwif->gendev_rel_sem); 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 696abort: 697 spin_unlock_irq(&ide_lock); 698 up(&ide_cfg_sem); 699} 700 701EXPORT_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 719void 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 769int 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; 792found: 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 819EXPORT_SYMBOL(ide_register_hw_with_fixup); 820 821int ide_register_hw(hw_regs_t *hw, ide_hwif_t **hwifp) 822{ 823 return ide_register_hw_with_fixup(hw, hwifp, NULL); 824} 825 826EXPORT_SYMBOL(ide_register_hw); 827 828/* 829 * Locks for IDE setting functionality 830 */ 831 832DECLARE_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 861static 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; 890abort: 891 up(&ide_setting_sem); 892 kfree(setting); 893 return -1; 894} 895 896int 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 901EXPORT_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 912static 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 939static 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 962ide_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 983static void auto_remove_settings (ide_drive_t *drive) 984{ 985 ide_settings_t *setting; 986repeat: 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 1010int 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 1043int 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 1065EXPORT_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 1085int 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 1120static 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 1130static 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 1150static 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 1165static 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 1187void 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 1210int system_bus_clock (void) 1211{ 1212 return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed )); 1213} 1214 1215EXPORT_SYMBOL(system_bus_clock); 1216 1217static 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 1236static 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 1255int 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 1405EXPORT_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 */ 1411static 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 */ 1429static 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 1472static int __initdata probe_ali14xx; 1473extern int ali14xx_init(void); 1474#endif 1475#ifdef CONFIG_BLK_DEV_UMC8672 1476static int __initdata probe_umc8672; 1477extern int umc8672_init(void); 1478#endif 1479#ifdef CONFIG_BLK_DEV_DTC2278 1480static int __initdata probe_dtc2278; 1481extern int dtc2278_init(void); 1482#endif 1483#ifdef CONFIG_BLK_DEV_HT6560B 1484static int __initdata probe_ht6560b; 1485extern int ht6560b_init(void); 1486#endif 1487#ifdef CONFIG_BLK_DEV_QD65XX 1488static int __initdata probe_qd65xx; 1489extern int qd65xx_init(void); 1490#endif 1491 1492static 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 */ 1500static 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 } 1765bad_option: 1766 printk(" -- BAD OPTION\n"); 1767 return 1; 1768obsolete_option: 1769 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n"); 1770 return 1; 1771bad_hwif: 1772 printk("-- NOT SUPPORTED ON ide%d", hw); 1773done: 1774 printk("\n"); 1775 return 1; 1776} 1777 1778extern void pnpide_init(void); 1779extern void h8300_ide_init(void); 1780 1781/* 1782 * probe_for_hwifs() finds/initializes "known" IDE interfaces 1783 */ 1784static 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 1846void 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 1853EXPORT_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 1867void 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 1881EXPORT_SYMBOL(ide_unregister_subdriver); 1882 1883/* 1884 * Probe module 1885 */ 1886 1887EXPORT_SYMBOL(ide_lock); 1888 1889static int ide_bus_match(struct device *dev, struct device_driver *drv) 1890{ 1891 return 1; 1892} 1893 1894static 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 1910static 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 1916static 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 1922static 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 1928static struct device_attribute ide_dev_attrs[] = { 1929 __ATTR_RO(media), 1930 __ATTR_RO(drivename), 1931 __ATTR_RO(modalias), 1932 __ATTR_NULL 1933}; 1934 1935static 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 1952struct bus_type ide_bus_type = { 1953 .name = "ide", 1954 .match = ide_bus_match, 1955 .uevent = ide_uevent, 1956 .dev_attrs = ide_dev_attrs, 1957 .suspend = generic_ide_suspend, 1958 .resume = generic_ide_resume, 1959}; 1960 1961EXPORT_SYMBOL_GPL(ide_bus_type); 1962 1963/* 1964 * This is gets invoked once during initialization, to set *everything* up 1965 */ 1966static int __init ide_init(void) 1967{ 1968 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n"); 1969 devfs_mk_dir("ide"); 1970 system_bus_speed = ide_system_bus_speed(); 1971 1972 bus_register(&ide_bus_type); 1973 1974 init_ide_data(); 1975 1976#ifdef CONFIG_PROC_FS 1977 proc_ide_root = proc_mkdir("ide", NULL); 1978#endif 1979 1980#ifdef CONFIG_BLK_DEV_ALI14XX 1981 if (probe_ali14xx) 1982 (void)ali14xx_init(); 1983#endif 1984#ifdef CONFIG_BLK_DEV_UMC8672 1985 if (probe_umc8672) 1986 (void)umc8672_init(); 1987#endif 1988#ifdef CONFIG_BLK_DEV_DTC2278 1989 if (probe_dtc2278) 1990 (void)dtc2278_init(); 1991#endif 1992#ifdef CONFIG_BLK_DEV_HT6560B 1993 if (probe_ht6560b) 1994 (void)ht6560b_init(); 1995#endif 1996#ifdef CONFIG_BLK_DEV_QD65XX 1997 if (probe_qd65xx) 1998 (void)qd65xx_init(); 1999#endif 2000 2001 initializing = 1; 2002 /* Probe for special PCI and other "known" interface chipsets. */ 2003 probe_for_hwifs(); 2004 initializing = 0; 2005 2006#ifdef CONFIG_PROC_FS 2007 proc_ide_create(); 2008#endif 2009 return 0; 2010} 2011 2012#ifdef MODULE 2013static char *options = NULL; 2014module_param(options, charp, 0); 2015MODULE_LICENSE("GPL"); 2016 2017static void __init parse_options (char *line) 2018{ 2019 char *next = line; 2020 2021 if (line == NULL || !*line) 2022 return; 2023 while ((line = next) != NULL) { 2024 if ((next = strchr(line,' ')) != NULL) 2025 *next++ = 0; 2026 if (!ide_setup(line)) 2027 printk (KERN_INFO "Unknown option '%s'\n", line); 2028 } 2029} 2030 2031int init_module (void) 2032{ 2033 parse_options(options); 2034 return ide_init(); 2035} 2036 2037void cleanup_module (void) 2038{ 2039 int index; 2040 2041 for (index = 0; index < MAX_HWIFS; ++index) 2042 ide_unregister(index); 2043 2044#ifdef CONFIG_PROC_FS 2045 proc_ide_destroy(); 2046#endif 2047 devfs_remove("ide"); 2048 2049 bus_unregister(&ide_bus_type); 2050} 2051 2052#else /* !MODULE */ 2053 2054__setup("", ide_setup); 2055 2056module_init(ide_init); 2057 2058#endif /* MODULE */ 2059