ide.c revision 9e5755bce00bb563739aeb0f09932a1907521167
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/module.h> 134#include <linux/types.h> 135#include <linux/string.h> 136#include <linux/kernel.h> 137#include <linux/timer.h> 138#include <linux/mm.h> 139#include <linux/interrupt.h> 140#include <linux/major.h> 141#include <linux/errno.h> 142#include <linux/genhd.h> 143#include <linux/blkpg.h> 144#include <linux/slab.h> 145#include <linux/init.h> 146#include <linux/pci.h> 147#include <linux/delay.h> 148#include <linux/ide.h> 149#include <linux/completion.h> 150#include <linux/reboot.h> 151#include <linux/cdrom.h> 152#include <linux/seq_file.h> 153#include <linux/device.h> 154#include <linux/bitops.h> 155 156#include <asm/byteorder.h> 157#include <asm/irq.h> 158#include <asm/uaccess.h> 159#include <asm/io.h> 160 161 162/* default maximum number of failures */ 163#define IDE_DEFAULT_MAX_FAILURES 1 164 165static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR, 166 IDE2_MAJOR, IDE3_MAJOR, 167 IDE4_MAJOR, IDE5_MAJOR, 168 IDE6_MAJOR, IDE7_MAJOR, 169 IDE8_MAJOR, IDE9_MAJOR }; 170 171static int idebus_parameter; /* holds the "idebus=" parameter */ 172static int system_bus_speed; /* holds what we think is VESA/PCI bus speed */ 173static int initializing; /* set while initializing built-in drivers */ 174 175DECLARE_MUTEX(ide_cfg_sem); 176 __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock); 177 178#ifdef CONFIG_BLK_DEV_IDEPCI 179static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */ 180#endif 181 182#ifdef CONFIG_IDEDMA_AUTO 183int noautodma = 0; 184#else 185int noautodma = 1; 186#endif 187 188EXPORT_SYMBOL(noautodma); 189 190#ifdef CONFIG_BLK_DEV_IDEACPI 191int ide_noacpi = 0; 192int ide_noacpitfs = 1; 193int ide_noacpionboot = 1; 194#endif 195 196/* 197 * This is declared extern in ide.h, for access by other IDE modules: 198 */ 199ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */ 200 201EXPORT_SYMBOL(ide_hwifs); 202 203/* 204 * Do not even *think* about calling this! 205 */ 206static void init_hwif_data(ide_hwif_t *hwif, unsigned int index) 207{ 208 unsigned int unit; 209 210 /* bulk initialize hwif & drive info with zeros */ 211 memset(hwif, 0, sizeof(ide_hwif_t)); 212 213 /* fill in any non-zero initial values */ 214 hwif->index = index; 215 hwif->major = ide_hwif_to_major[index]; 216 217 hwif->name[0] = 'i'; 218 hwif->name[1] = 'd'; 219 hwif->name[2] = 'e'; 220 hwif->name[3] = '0' + index; 221 222 hwif->bus_state = BUSSTATE_ON; 223 224 hwif->atapi_dma = 0; /* disable all atapi dma */ 225 hwif->ultra_mask = 0x80; /* disable all ultra */ 226 hwif->mwdma_mask = 0x80; /* disable all mwdma */ 227 hwif->swdma_mask = 0x80; /* disable all swdma */ 228 229 init_completion(&hwif->gendev_rel_comp); 230 231 default_hwif_iops(hwif); 232 default_hwif_transport(hwif); 233 for (unit = 0; unit < MAX_DRIVES; ++unit) { 234 ide_drive_t *drive = &hwif->drives[unit]; 235 236 drive->media = ide_disk; 237 drive->select.all = (unit<<4)|0xa0; 238 drive->hwif = hwif; 239 drive->ctl = 0x08; 240 drive->ready_stat = READY_STAT; 241 drive->bad_wstat = BAD_W_STAT; 242 drive->special.b.recalibrate = 1; 243 drive->special.b.set_geometry = 1; 244 drive->name[0] = 'h'; 245 drive->name[1] = 'd'; 246 drive->name[2] = 'a' + (index * MAX_DRIVES) + unit; 247 drive->max_failures = IDE_DEFAULT_MAX_FAILURES; 248 drive->using_dma = 0; 249 drive->vdma = 0; 250 INIT_LIST_HEAD(&drive->list); 251 init_completion(&drive->gendev_rel_comp); 252 } 253} 254 255static void init_hwif_default(ide_hwif_t *hwif, unsigned int index) 256{ 257 hw_regs_t hw; 258 259 memset(&hw, 0, sizeof(hw_regs_t)); 260 261 ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq); 262 263 memcpy(&hwif->hw, &hw, sizeof(hw)); 264 memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports)); 265 266 hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET]; 267#ifdef CONFIG_BLK_DEV_HD 268 if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA) 269 hwif->noprobe = 1; /* may be overridden by ide_setup() */ 270#endif 271} 272 273extern void ide_arm_init(void); 274 275/* 276 * init_ide_data() sets reasonable default values into all fields 277 * of all instances of the hwifs and drives, but only on the first call. 278 * Subsequent calls have no effect (they don't wipe out anything). 279 * 280 * This routine is normally called at driver initialization time, 281 * but may also be called MUCH earlier during kernel "command-line" 282 * parameter processing. As such, we cannot depend on any other parts 283 * of the kernel (such as memory allocation) to be functioning yet. 284 * 285 * This is too bad, as otherwise we could dynamically allocate the 286 * ide_drive_t structs as needed, rather than always consuming memory 287 * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them. 288 * 289 * FIXME: We should stuff the setup data into __init and copy the 290 * relevant hwifs/allocate them properly during boot. 291 */ 292#define MAGIC_COOKIE 0x12345678 293static void __init init_ide_data (void) 294{ 295 ide_hwif_t *hwif; 296 unsigned int index; 297 static unsigned long magic_cookie = MAGIC_COOKIE; 298 299 if (magic_cookie != MAGIC_COOKIE) 300 return; /* already initialized */ 301 magic_cookie = 0; 302 303 /* Initialise all interface structures */ 304 for (index = 0; index < MAX_HWIFS; ++index) { 305 hwif = &ide_hwifs[index]; 306 init_hwif_data(hwif, index); 307 init_hwif_default(hwif, index); 308#if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI) 309 hwif->irq = hwif->hw.irq = 310 ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]); 311#endif 312 } 313#ifdef CONFIG_IDE_ARM 314 initializing = 1; 315 ide_arm_init(); 316 initializing = 0; 317#endif 318} 319 320/** 321 * ide_system_bus_speed - guess bus speed 322 * 323 * ide_system_bus_speed() returns what we think is the system VESA/PCI 324 * bus speed (in MHz). This is used for calculating interface PIO timings. 325 * The default is 40 for known PCI systems, 50 otherwise. 326 * The "idebus=xx" parameter can be used to override this value. 327 * The actual value to be used is computed/displayed the first time 328 * through. Drivers should only use this as a last resort. 329 * 330 * Returns a guessed speed in MHz. 331 */ 332 333static int ide_system_bus_speed(void) 334{ 335#ifdef CONFIG_PCI 336 static struct pci_device_id pci_default[] = { 337 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) }, 338 { } 339 }; 340#else 341#define pci_default 0 342#endif /* CONFIG_PCI */ 343 344 if (!system_bus_speed) { 345 if (idebus_parameter) { 346 /* user supplied value */ 347 system_bus_speed = idebus_parameter; 348 } else if (pci_dev_present(pci_default)) { 349 /* safe default value for PCI */ 350 system_bus_speed = 33; 351 } else { 352 /* safe default value for VESA and PCI */ 353 system_bus_speed = 50; 354 } 355 printk(KERN_INFO "ide: Assuming %dMHz system bus speed " 356 "for PIO modes%s\n", system_bus_speed, 357 idebus_parameter ? "" : "; override with idebus=xx"); 358 } 359 return system_bus_speed; 360} 361 362#ifdef CONFIG_PROC_FS 363struct proc_dir_entry *proc_ide_root; 364#endif 365 366static struct resource* hwif_request_region(ide_hwif_t *hwif, 367 unsigned long addr, int num) 368{ 369 struct resource *res = request_region(addr, num, hwif->name); 370 371 if (!res) 372 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n", 373 hwif->name, addr, addr+num-1); 374 return res; 375} 376 377/** 378 * ide_hwif_request_regions - request resources for IDE 379 * @hwif: interface to use 380 * 381 * Requests all the needed resources for an interface. 382 * Right now core IDE code does this work which is deeply wrong. 383 * MMIO leaves it to the controller driver, 384 * PIO will migrate this way over time. 385 */ 386 387int ide_hwif_request_regions(ide_hwif_t *hwif) 388{ 389 unsigned long addr; 390 unsigned int i; 391 392 if (hwif->mmio) 393 return 0; 394 addr = hwif->io_ports[IDE_CONTROL_OFFSET]; 395 if (addr && !hwif_request_region(hwif, addr, 1)) 396 goto control_region_busy; 397 hwif->straight8 = 0; 398 addr = hwif->io_ports[IDE_DATA_OFFSET]; 399 if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) { 400 if (!hwif_request_region(hwif, addr, 8)) 401 goto data_region_busy; 402 hwif->straight8 = 1; 403 return 0; 404 } 405 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) { 406 addr = hwif->io_ports[i]; 407 if (!hwif_request_region(hwif, addr, 1)) { 408 while (--i) 409 release_region(addr, 1); 410 goto data_region_busy; 411 } 412 } 413 return 0; 414 415data_region_busy: 416 addr = hwif->io_ports[IDE_CONTROL_OFFSET]; 417 if (addr) 418 release_region(addr, 1); 419control_region_busy: 420 /* If any errors are return, we drop the hwif interface. */ 421 return -EBUSY; 422} 423 424/** 425 * ide_hwif_release_regions - free IDE resources 426 * 427 * Note that we only release the standard ports, 428 * and do not even try to handle any extra ports 429 * allocated for weird IDE interface chipsets. 430 * 431 * Note also that we don't yet handle mmio resources here. More 432 * importantly our caller should be doing this so we need to 433 * restructure this as a helper function for drivers. 434 */ 435 436void ide_hwif_release_regions(ide_hwif_t *hwif) 437{ 438 u32 i = 0; 439 440 if (hwif->mmio) 441 return; 442 if (hwif->io_ports[IDE_CONTROL_OFFSET]) 443 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1); 444 if (hwif->straight8) { 445 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8); 446 return; 447 } 448 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) 449 if (hwif->io_ports[i]) 450 release_region(hwif->io_ports[i], 1); 451} 452 453/** 454 * ide_hwif_restore - restore hwif to template 455 * @hwif: hwif to update 456 * @tmp_hwif: template 457 * 458 * Restore hwif to a previous state by copying most settings 459 * from the template. 460 */ 461 462static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif) 463{ 464 hwif->hwgroup = tmp_hwif->hwgroup; 465 466 hwif->gendev.parent = tmp_hwif->gendev.parent; 467 468 hwif->proc = tmp_hwif->proc; 469 470 hwif->major = tmp_hwif->major; 471 hwif->straight8 = tmp_hwif->straight8; 472 hwif->bus_state = tmp_hwif->bus_state; 473 474 hwif->atapi_dma = tmp_hwif->atapi_dma; 475 hwif->ultra_mask = tmp_hwif->ultra_mask; 476 hwif->mwdma_mask = tmp_hwif->mwdma_mask; 477 hwif->swdma_mask = tmp_hwif->swdma_mask; 478 479 hwif->chipset = tmp_hwif->chipset; 480 hwif->hold = tmp_hwif->hold; 481 482#ifdef CONFIG_BLK_DEV_IDEPCI 483 hwif->pci_dev = tmp_hwif->pci_dev; 484 hwif->cds = tmp_hwif->cds; 485#endif 486 487 hwif->tuneproc = tmp_hwif->tuneproc; 488 hwif->speedproc = tmp_hwif->speedproc; 489 hwif->selectproc = tmp_hwif->selectproc; 490 hwif->reset_poll = tmp_hwif->reset_poll; 491 hwif->pre_reset = tmp_hwif->pre_reset; 492 hwif->resetproc = tmp_hwif->resetproc; 493 hwif->intrproc = tmp_hwif->intrproc; 494 hwif->maskproc = tmp_hwif->maskproc; 495 hwif->quirkproc = tmp_hwif->quirkproc; 496 hwif->busproc = tmp_hwif->busproc; 497 498 hwif->ata_input_data = tmp_hwif->ata_input_data; 499 hwif->ata_output_data = tmp_hwif->ata_output_data; 500 hwif->atapi_input_bytes = tmp_hwif->atapi_input_bytes; 501 hwif->atapi_output_bytes = tmp_hwif->atapi_output_bytes; 502 503 hwif->dma_setup = tmp_hwif->dma_setup; 504 hwif->dma_exec_cmd = tmp_hwif->dma_exec_cmd; 505 hwif->dma_start = tmp_hwif->dma_start; 506 hwif->ide_dma_end = tmp_hwif->ide_dma_end; 507 hwif->ide_dma_check = tmp_hwif->ide_dma_check; 508 hwif->ide_dma_on = tmp_hwif->ide_dma_on; 509 hwif->dma_off_quietly = tmp_hwif->dma_off_quietly; 510 hwif->ide_dma_test_irq = tmp_hwif->ide_dma_test_irq; 511 hwif->ide_dma_clear_irq = tmp_hwif->ide_dma_clear_irq; 512 hwif->dma_host_on = tmp_hwif->dma_host_on; 513 hwif->dma_host_off = tmp_hwif->dma_host_off; 514 hwif->ide_dma_lostirq = tmp_hwif->ide_dma_lostirq; 515 hwif->ide_dma_timeout = tmp_hwif->ide_dma_timeout; 516 517 hwif->OUTB = tmp_hwif->OUTB; 518 hwif->OUTBSYNC = tmp_hwif->OUTBSYNC; 519 hwif->OUTW = tmp_hwif->OUTW; 520 hwif->OUTSW = tmp_hwif->OUTSW; 521 hwif->OUTSL = tmp_hwif->OUTSL; 522 523 hwif->INB = tmp_hwif->INB; 524 hwif->INW = tmp_hwif->INW; 525 hwif->INSW = tmp_hwif->INSW; 526 hwif->INSL = tmp_hwif->INSL; 527 528 hwif->sg_max_nents = tmp_hwif->sg_max_nents; 529 530 hwif->mmio = tmp_hwif->mmio; 531 hwif->rqsize = tmp_hwif->rqsize; 532 hwif->no_lba48 = tmp_hwif->no_lba48; 533 534#ifndef CONFIG_BLK_DEV_IDECS 535 hwif->irq = tmp_hwif->irq; 536#endif 537 538 hwif->dma_base = tmp_hwif->dma_base; 539 hwif->dma_master = tmp_hwif->dma_master; 540 hwif->dma_command = tmp_hwif->dma_command; 541 hwif->dma_vendor1 = tmp_hwif->dma_vendor1; 542 hwif->dma_status = tmp_hwif->dma_status; 543 hwif->dma_vendor3 = tmp_hwif->dma_vendor3; 544 hwif->dma_prdtable = tmp_hwif->dma_prdtable; 545 546 hwif->config_data = tmp_hwif->config_data; 547 hwif->select_data = tmp_hwif->select_data; 548 hwif->extra_base = tmp_hwif->extra_base; 549 hwif->extra_ports = tmp_hwif->extra_ports; 550 hwif->autodma = tmp_hwif->autodma; 551 hwif->udma_four = tmp_hwif->udma_four; 552 553 hwif->hwif_data = tmp_hwif->hwif_data; 554} 555 556/** 557 * ide_unregister - free an IDE interface 558 * @index: index of interface (will change soon to a pointer) 559 * 560 * Perform the final unregister of an IDE interface. At the moment 561 * we don't refcount interfaces so this will also get split up. 562 * 563 * Locking: 564 * The caller must not hold the IDE locks 565 * The drive present/vanishing is not yet properly locked 566 * Take care with the callbacks. These have been split to avoid 567 * deadlocking the IDE layer. The shutdown callback is called 568 * before we take the lock and free resources. It is up to the 569 * caller to be sure there is no pending I/O here, and that 570 * the interface will not be reopened (present/vanishing locking 571 * isn't yet done BTW). After we commit to the final kill we 572 * call the cleanup callback with the ide locks held. 573 * 574 * Unregister restores the hwif structures to the default state. 575 * This is raving bonkers. 576 */ 577 578void ide_unregister(unsigned int index) 579{ 580 ide_drive_t *drive; 581 ide_hwif_t *hwif, *g; 582 static ide_hwif_t tmp_hwif; /* protected by ide_cfg_sem */ 583 ide_hwgroup_t *hwgroup; 584 int irq_count = 0, unit; 585 586 BUG_ON(index >= MAX_HWIFS); 587 588 BUG_ON(in_interrupt()); 589 BUG_ON(irqs_disabled()); 590 down(&ide_cfg_sem); 591 spin_lock_irq(&ide_lock); 592 hwif = &ide_hwifs[index]; 593 if (!hwif->present) 594 goto abort; 595 for (unit = 0; unit < MAX_DRIVES; ++unit) { 596 drive = &hwif->drives[unit]; 597 if (!drive->present) 598 continue; 599 spin_unlock_irq(&ide_lock); 600 device_unregister(&drive->gendev); 601 wait_for_completion(&drive->gendev_rel_comp); 602 spin_lock_irq(&ide_lock); 603 } 604 hwif->present = 0; 605 606 spin_unlock_irq(&ide_lock); 607 608 destroy_proc_ide_interface(hwif); 609 610 hwgroup = hwif->hwgroup; 611 /* 612 * free the irq if we were the only hwif using it 613 */ 614 g = hwgroup->hwif; 615 do { 616 if (g->irq == hwif->irq) 617 ++irq_count; 618 g = g->next; 619 } while (g != hwgroup->hwif); 620 if (irq_count == 1) 621 free_irq(hwif->irq, hwgroup); 622 623 spin_lock_irq(&ide_lock); 624 /* 625 * Note that we only release the standard ports, 626 * and do not even try to handle any extra ports 627 * allocated for weird IDE interface chipsets. 628 */ 629 ide_hwif_release_regions(hwif); 630 631 /* 632 * Remove us from the hwgroup, and free 633 * the hwgroup if we were the only member 634 */ 635 if (hwif->next == hwif) { 636 BUG_ON(hwgroup->hwif != hwif); 637 kfree(hwgroup); 638 } else { 639 /* There is another interface in hwgroup. 640 * Unlink us, and set hwgroup->drive and ->hwif to 641 * something sane. 642 */ 643 g = hwgroup->hwif; 644 while (g->next != hwif) 645 g = g->next; 646 g->next = hwif->next; 647 if (hwgroup->hwif == hwif) { 648 /* Chose a random hwif for hwgroup->hwif. 649 * It's guaranteed that there are no drives 650 * left in the hwgroup. 651 */ 652 BUG_ON(hwgroup->drive != NULL); 653 hwgroup->hwif = g; 654 } 655 BUG_ON(hwgroup->hwif == hwif); 656 } 657 658 /* More messed up locking ... */ 659 spin_unlock_irq(&ide_lock); 660 device_unregister(&hwif->gendev); 661 wait_for_completion(&hwif->gendev_rel_comp); 662 663 /* 664 * Remove us from the kernel's knowledge 665 */ 666 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS); 667 kfree(hwif->sg_table); 668 unregister_blkdev(hwif->major, hwif->name); 669 spin_lock_irq(&ide_lock); 670 671 if (hwif->dma_base) { 672 (void) ide_release_dma(hwif); 673 674 hwif->dma_base = 0; 675 hwif->dma_master = 0; 676 hwif->dma_command = 0; 677 hwif->dma_vendor1 = 0; 678 hwif->dma_status = 0; 679 hwif->dma_vendor3 = 0; 680 hwif->dma_prdtable = 0; 681 682 hwif->extra_base = 0; 683 hwif->extra_ports = 0; 684 } 685 686 /* copy original settings */ 687 tmp_hwif = *hwif; 688 689 /* restore hwif data to pristine status */ 690 init_hwif_data(hwif, index); 691 init_hwif_default(hwif, index); 692 693 ide_hwif_restore(hwif, &tmp_hwif); 694 695abort: 696 spin_unlock_irq(&ide_lock); 697 up(&ide_cfg_sem); 698} 699 700EXPORT_SYMBOL(ide_unregister); 701 702 703/** 704 * ide_setup_ports - set up IDE interface ports 705 * @hw: register descriptions 706 * @base: base register 707 * @offsets: table of register offsets 708 * @ctrl: control register 709 * @ack_irq: IRQ ack 710 * @irq: interrupt lie 711 * 712 * Setup hw_regs_t structure described by parameters. You 713 * may set up the hw structure yourself OR use this routine to 714 * do it for you. This is basically a helper 715 * 716 */ 717 718void ide_setup_ports ( hw_regs_t *hw, 719 unsigned long base, int *offsets, 720 unsigned long ctrl, unsigned long intr, 721 ide_ack_intr_t *ack_intr, 722/* 723 * ide_io_ops_t *iops, 724 */ 725 int irq) 726{ 727 int i; 728 729 memset(hw, 0, sizeof(hw_regs_t)); 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 not be called from IRQ context. The 980 * 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 (ide_set_dma(drive)) 1139 return -EIO; 1140 if (HWIF(drive)->ide_dma_on(drive)) return -EIO; 1141 } else 1142 ide_dma_off(drive); 1143 return 0; 1144#else 1145 return -EPERM; 1146#endif 1147} 1148 1149static int set_pio_mode (ide_drive_t *drive, int arg) 1150{ 1151 struct request rq; 1152 1153 if (!HWIF(drive)->tuneproc) 1154 return -ENOSYS; 1155 if (drive->special.b.set_tune) 1156 return -EBUSY; 1157 ide_init_drive_cmd(&rq); 1158 drive->tune_req = (u8) arg; 1159 drive->special.b.set_tune = 1; 1160 (void) ide_do_drive_cmd(drive, &rq, ide_wait); 1161 return 0; 1162} 1163 1164static int set_xfer_rate (ide_drive_t *drive, int arg) 1165{ 1166 int err = ide_wait_cmd(drive, 1167 WIN_SETFEATURES, (u8) arg, 1168 SETFEATURES_XFER, 0, NULL); 1169 1170 if (!err && arg) { 1171 ide_set_xfer_rate(drive, (u8) arg); 1172 ide_driveid_update(drive); 1173 } 1174 return err; 1175} 1176 1177/** 1178 * ide_add_generic_settings - generic ide settings 1179 * @drive: drive being configured 1180 * 1181 * Add the generic parts of the system settings to the /proc files and 1182 * ioctls for this IDE device. The caller must not be holding the 1183 * ide_setting_sem. 1184 */ 1185 1186void ide_add_generic_settings (ide_drive_t *drive) 1187{ 1188/* 1189 * drive setting name read/write access read ioctl write ioctl data type min max mul_factor div_factor data pointer set function 1190 */ 1191 __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); 1192 __ide_add_setting(drive, "keepsettings", SETTING_RW, HDIO_GET_KEEPSETTINGS, HDIO_SET_KEEPSETTINGS, TYPE_BYTE, 0, 1, 1, 1, &drive->keep_settings, NULL, 0); 1193 __ide_add_setting(drive, "nice1", SETTING_RW, -1, -1, TYPE_BYTE, 0, 1, 1, 1, &drive->nice1, NULL, 0); 1194 __ide_add_setting(drive, "pio_mode", SETTING_WRITE, -1, HDIO_SET_PIO_MODE, TYPE_BYTE, 0, 255, 1, 1, NULL, set_pio_mode, 0); 1195 __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); 1196 __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); 1197 __ide_add_setting(drive, "init_speed", SETTING_RW, -1, -1, TYPE_BYTE, 0, 70, 1, 1, &drive->init_speed, NULL, 0); 1198 __ide_add_setting(drive, "current_speed", SETTING_RW, -1, -1, TYPE_BYTE, 0, 70, 1, 1, &drive->current_speed, set_xfer_rate, 0); 1199 __ide_add_setting(drive, "number", SETTING_RW, -1, -1, TYPE_BYTE, 0, 3, 1, 1, &drive->dn, NULL, 0); 1200} 1201 1202/** 1203 * system_bus_clock - clock guess 1204 * 1205 * External version of the bus clock guess used by very old IDE drivers 1206 * for things like VLB timings. Should not be used. 1207 */ 1208 1209int system_bus_clock (void) 1210{ 1211 return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed )); 1212} 1213 1214EXPORT_SYMBOL(system_bus_clock); 1215 1216static int generic_ide_suspend(struct device *dev, pm_message_t mesg) 1217{ 1218 ide_drive_t *drive = dev->driver_data; 1219 ide_hwif_t *hwif = HWIF(drive); 1220 struct request rq; 1221 struct request_pm_state rqpm; 1222 ide_task_t args; 1223 1224 /* Call ACPI _GTM only once */ 1225 if (!(drive->dn % 2)) 1226 ide_acpi_get_timing(hwif); 1227 1228 memset(&rq, 0, sizeof(rq)); 1229 memset(&rqpm, 0, sizeof(rqpm)); 1230 memset(&args, 0, sizeof(args)); 1231 rq.cmd_type = REQ_TYPE_PM_SUSPEND; 1232 rq.special = &args; 1233 rq.data = &rqpm; 1234 rqpm.pm_step = ide_pm_state_start_suspend; 1235 if (mesg.event == PM_EVENT_PRETHAW) 1236 mesg.event = PM_EVENT_FREEZE; 1237 rqpm.pm_state = mesg.event; 1238 1239 return ide_do_drive_cmd(drive, &rq, ide_wait); 1240} 1241 1242static int generic_ide_resume(struct device *dev) 1243{ 1244 ide_drive_t *drive = dev->driver_data; 1245 ide_hwif_t *hwif = HWIF(drive); 1246 struct request rq; 1247 struct request_pm_state rqpm; 1248 ide_task_t args; 1249 1250 /* Call ACPI _STM only once */ 1251 if (!(drive->dn % 2)) 1252 ide_acpi_push_timing(hwif); 1253 1254 ide_acpi_exec_tfs(drive); 1255 1256 memset(&rq, 0, sizeof(rq)); 1257 memset(&rqpm, 0, sizeof(rqpm)); 1258 memset(&args, 0, sizeof(args)); 1259 rq.cmd_type = REQ_TYPE_PM_RESUME; 1260 rq.special = &args; 1261 rq.data = &rqpm; 1262 rqpm.pm_step = ide_pm_state_start_resume; 1263 rqpm.pm_state = PM_EVENT_ON; 1264 1265 return ide_do_drive_cmd(drive, &rq, ide_head_wait); 1266} 1267 1268int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev, 1269 unsigned int cmd, unsigned long arg) 1270{ 1271 ide_settings_t *setting; 1272 ide_driver_t *drv; 1273 int err = 0; 1274 void __user *p = (void __user *)arg; 1275 1276 down(&ide_setting_sem); 1277 if ((setting = ide_find_setting_by_ioctl(drive, cmd)) != NULL) { 1278 if (cmd == setting->read_ioctl) { 1279 err = ide_read_setting(drive, setting); 1280 up(&ide_setting_sem); 1281 return err >= 0 ? put_user(err, (long __user *)arg) : err; 1282 } else { 1283 if (bdev != bdev->bd_contains) 1284 err = -EINVAL; 1285 else 1286 err = ide_write_setting(drive, setting, arg); 1287 up(&ide_setting_sem); 1288 return err; 1289 } 1290 } 1291 up(&ide_setting_sem); 1292 1293 switch (cmd) { 1294 case HDIO_OBSOLETE_IDENTITY: 1295 case HDIO_GET_IDENTITY: 1296 if (bdev != bdev->bd_contains) 1297 return -EINVAL; 1298 if (drive->id_read == 0) 1299 return -ENOMSG; 1300 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142)) 1301 return -EFAULT; 1302 return 0; 1303 1304 case HDIO_GET_NICE: 1305 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP | 1306 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP | 1307 drive->nice0 << IDE_NICE_0 | 1308 drive->nice1 << IDE_NICE_1 | 1309 drive->nice2 << IDE_NICE_2, 1310 (long __user *) arg); 1311 1312#ifdef CONFIG_IDE_TASK_IOCTL 1313 case HDIO_DRIVE_TASKFILE: 1314 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 1315 return -EACCES; 1316 switch(drive->media) { 1317 case ide_disk: 1318 return ide_taskfile_ioctl(drive, cmd, arg); 1319 default: 1320 return -ENOMSG; 1321 } 1322#endif /* CONFIG_IDE_TASK_IOCTL */ 1323 1324 case HDIO_DRIVE_CMD: 1325 if (!capable(CAP_SYS_RAWIO)) 1326 return -EACCES; 1327 return ide_cmd_ioctl(drive, cmd, arg); 1328 1329 case HDIO_DRIVE_TASK: 1330 if (!capable(CAP_SYS_RAWIO)) 1331 return -EACCES; 1332 return ide_task_ioctl(drive, cmd, arg); 1333 1334 case HDIO_SCAN_HWIF: 1335 { 1336 hw_regs_t hw; 1337 int args[3]; 1338 if (!capable(CAP_SYS_RAWIO)) return -EACCES; 1339 if (copy_from_user(args, p, 3 * sizeof(int))) 1340 return -EFAULT; 1341 memset(&hw, 0, sizeof(hw)); 1342 ide_init_hwif_ports(&hw, (unsigned long) args[0], 1343 (unsigned long) args[1], NULL); 1344 hw.irq = args[2]; 1345 if (ide_register_hw(&hw, NULL) == -1) 1346 return -EIO; 1347 return 0; 1348 } 1349 case HDIO_UNREGISTER_HWIF: 1350 if (!capable(CAP_SYS_RAWIO)) return -EACCES; 1351 /* (arg > MAX_HWIFS) checked in function */ 1352 ide_unregister(arg); 1353 return 0; 1354 case HDIO_SET_NICE: 1355 if (!capable(CAP_SYS_ADMIN)) return -EACCES; 1356 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1)))) 1357 return -EPERM; 1358 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1; 1359 drv = *(ide_driver_t **)bdev->bd_disk->private_data; 1360 if (drive->dsc_overlap && !drv->supports_dsc_overlap) { 1361 drive->dsc_overlap = 0; 1362 return -EPERM; 1363 } 1364 drive->nice1 = (arg >> IDE_NICE_1) & 1; 1365 return 0; 1366 case HDIO_DRIVE_RESET: 1367 { 1368 unsigned long flags; 1369 if (!capable(CAP_SYS_ADMIN)) return -EACCES; 1370 1371 /* 1372 * Abort the current command on the 1373 * group if there is one, taking 1374 * care not to allow anything else 1375 * to be queued and to die on the 1376 * spot if we miss one somehow 1377 */ 1378 1379 spin_lock_irqsave(&ide_lock, flags); 1380 1381 if (HWGROUP(drive)->resetting) { 1382 spin_unlock_irqrestore(&ide_lock, flags); 1383 return -EBUSY; 1384 } 1385 1386 ide_abort(drive, "drive reset"); 1387 1388 BUG_ON(HWGROUP(drive)->handler); 1389 1390 /* Ensure nothing gets queued after we 1391 drop the lock. Reset will clear the busy */ 1392 1393 HWGROUP(drive)->busy = 1; 1394 spin_unlock_irqrestore(&ide_lock, flags); 1395 (void) ide_do_reset(drive); 1396 1397 return 0; 1398 } 1399 1400 case CDROMEJECT: 1401 case CDROMCLOSETRAY: 1402 return scsi_cmd_ioctl(file, bdev->bd_disk, cmd, p); 1403 1404 case HDIO_GET_BUSSTATE: 1405 if (!capable(CAP_SYS_ADMIN)) 1406 return -EACCES; 1407 if (put_user(HWIF(drive)->bus_state, (long __user *)arg)) 1408 return -EFAULT; 1409 return 0; 1410 1411 case HDIO_SET_BUSSTATE: 1412 if (!capable(CAP_SYS_ADMIN)) 1413 return -EACCES; 1414 if (HWIF(drive)->busproc) 1415 return HWIF(drive)->busproc(drive, (int)arg); 1416 return -EOPNOTSUPP; 1417 default: 1418 return -EINVAL; 1419 } 1420} 1421 1422EXPORT_SYMBOL(generic_ide_ioctl); 1423 1424/* 1425 * stridx() returns the offset of c within s, 1426 * or -1 if c is '\0' or not found within s. 1427 */ 1428static int __init stridx (const char *s, char c) 1429{ 1430 char *i = strchr(s, c); 1431 return (i && c) ? i - s : -1; 1432} 1433 1434/* 1435 * match_parm() does parsing for ide_setup(): 1436 * 1437 * 1. the first char of s must be '='. 1438 * 2. if the remainder matches one of the supplied keywords, 1439 * the index (1 based) of the keyword is negated and returned. 1440 * 3. if the remainder is a series of no more than max_vals numbers 1441 * separated by commas, the numbers are saved in vals[] and a 1442 * count of how many were saved is returned. Base10 is assumed, 1443 * and base16 is allowed when prefixed with "0x". 1444 * 4. otherwise, zero is returned. 1445 */ 1446static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals) 1447{ 1448 static const char *decimal = "0123456789"; 1449 static const char *hex = "0123456789abcdef"; 1450 int i, n; 1451 1452 if (*s++ == '=') { 1453 /* 1454 * Try matching against the supplied keywords, 1455 * and return -(index+1) if we match one 1456 */ 1457 if (keywords != NULL) { 1458 for (i = 0; *keywords != NULL; ++i) { 1459 if (!strcmp(s, *keywords++)) 1460 return -(i+1); 1461 } 1462 } 1463 /* 1464 * Look for a series of no more than "max_vals" 1465 * numeric values separated by commas, in base10, 1466 * or base16 when prefixed with "0x". 1467 * Return a count of how many were found. 1468 */ 1469 for (n = 0; (i = stridx(decimal, *s)) >= 0;) { 1470 vals[n] = i; 1471 while ((i = stridx(decimal, *++s)) >= 0) 1472 vals[n] = (vals[n] * 10) + i; 1473 if (*s == 'x' && !vals[n]) { 1474 while ((i = stridx(hex, *++s)) >= 0) 1475 vals[n] = (vals[n] * 0x10) + i; 1476 } 1477 if (++n == max_vals) 1478 break; 1479 if (*s == ',' || *s == ';') 1480 ++s; 1481 } 1482 if (!*s) 1483 return n; 1484 } 1485 return 0; /* zero = nothing matched */ 1486} 1487 1488#ifdef CONFIG_BLK_DEV_ALI14XX 1489static int __initdata probe_ali14xx; 1490extern int ali14xx_init(void); 1491#endif 1492#ifdef CONFIG_BLK_DEV_UMC8672 1493static int __initdata probe_umc8672; 1494extern int umc8672_init(void); 1495#endif 1496#ifdef CONFIG_BLK_DEV_DTC2278 1497static int __initdata probe_dtc2278; 1498extern int dtc2278_init(void); 1499#endif 1500#ifdef CONFIG_BLK_DEV_HT6560B 1501static int __initdata probe_ht6560b; 1502extern int ht6560b_init(void); 1503#endif 1504#ifdef CONFIG_BLK_DEV_QD65XX 1505static int __initdata probe_qd65xx; 1506extern int qd65xx_init(void); 1507#endif 1508 1509static int __initdata is_chipset_set[MAX_HWIFS]; 1510 1511/* 1512 * ide_setup() gets called VERY EARLY during initialization, 1513 * to handle kernel "command line" strings beginning with "hdx=" or "ide". 1514 * 1515 * Remember to update Documentation/ide.txt if you change something here. 1516 */ 1517static int __init ide_setup(char *s) 1518{ 1519 int i, vals[3]; 1520 ide_hwif_t *hwif; 1521 ide_drive_t *drive; 1522 unsigned int hw, unit; 1523 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1); 1524 const char max_hwif = '0' + (MAX_HWIFS - 1); 1525 1526 1527 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */ 1528 return 0; /* driver and not us */ 1529 1530 if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2)) 1531 return 0; 1532 1533 printk(KERN_INFO "ide_setup: %s", s); 1534 init_ide_data (); 1535 1536#ifdef CONFIG_BLK_DEV_IDEDOUBLER 1537 if (!strcmp(s, "ide=doubler")) { 1538 extern int ide_doubler; 1539 1540 printk(" : Enabled support for IDE doublers\n"); 1541 ide_doubler = 1; 1542 return 1; 1543 } 1544#endif /* CONFIG_BLK_DEV_IDEDOUBLER */ 1545 1546 if (!strcmp(s, "ide=nodma")) { 1547 printk(" : Prevented DMA\n"); 1548 noautodma = 1; 1549 return 1; 1550 } 1551 1552#ifdef CONFIG_BLK_DEV_IDEPCI 1553 if (!strcmp(s, "ide=reverse")) { 1554 ide_scan_direction = 1; 1555 printk(" : Enabled support for IDE inverse scan order.\n"); 1556 return 1; 1557 } 1558#endif /* CONFIG_BLK_DEV_IDEPCI */ 1559 1560#ifdef CONFIG_BLK_DEV_IDEACPI 1561 if (!strcmp(s, "ide=noacpi")) { 1562 //printk(" : Disable IDE ACPI support.\n"); 1563 ide_noacpi = 1; 1564 return 1; 1565 } 1566 if (!strcmp(s, "ide=acpigtf")) { 1567 //printk(" : Enable IDE ACPI _GTF support.\n"); 1568 ide_noacpitfs = 0; 1569 return 1; 1570 } 1571 if (!strcmp(s, "ide=acpionboot")) { 1572 //printk(" : Call IDE ACPI methods on boot.\n"); 1573 ide_noacpionboot = 0; 1574 return 1; 1575 } 1576#endif /* CONFIG_BLK_DEV_IDEACPI */ 1577 1578 /* 1579 * Look for drive options: "hdx=" 1580 */ 1581 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) { 1582 const char *hd_words[] = { 1583 "none", "noprobe", "nowerr", "cdrom", "serialize", 1584 "autotune", "noautotune", "minus8", "swapdata", "bswap", 1585 "noflush", "remap", "remap63", "scsi", NULL }; 1586 unit = s[2] - 'a'; 1587 hw = unit / MAX_DRIVES; 1588 unit = unit % MAX_DRIVES; 1589 hwif = &ide_hwifs[hw]; 1590 drive = &hwif->drives[unit]; 1591 if (strncmp(s + 4, "ide-", 4) == 0) { 1592 strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req)); 1593 goto done; 1594 } 1595 switch (match_parm(&s[3], hd_words, vals, 3)) { 1596 case -1: /* "none" */ 1597 case -2: /* "noprobe" */ 1598 drive->noprobe = 1; 1599 goto done; 1600 case -3: /* "nowerr" */ 1601 drive->bad_wstat = BAD_R_STAT; 1602 hwif->noprobe = 0; 1603 goto done; 1604 case -4: /* "cdrom" */ 1605 drive->present = 1; 1606 drive->media = ide_cdrom; 1607 /* an ATAPI device ignores DRDY */ 1608 drive->ready_stat = 0; 1609 hwif->noprobe = 0; 1610 goto done; 1611 case -5: /* "serialize" */ 1612 printk(" -- USE \"ide%d=serialize\" INSTEAD", hw); 1613 goto do_serialize; 1614 case -6: /* "autotune" */ 1615 drive->autotune = IDE_TUNE_AUTO; 1616 goto obsolete_option; 1617 case -7: /* "noautotune" */ 1618 drive->autotune = IDE_TUNE_NOAUTO; 1619 goto obsolete_option; 1620 case -9: /* "swapdata" */ 1621 case -10: /* "bswap" */ 1622 drive->bswap = 1; 1623 goto done; 1624 case -11: /* noflush */ 1625 drive->noflush = 1; 1626 goto done; 1627 case -12: /* "remap" */ 1628 drive->remap_0_to_1 = 1; 1629 goto done; 1630 case -13: /* "remap63" */ 1631 drive->sect0 = 63; 1632 goto done; 1633 case -14: /* "scsi" */ 1634 drive->scsi = 1; 1635 goto done; 1636 case 3: /* cyl,head,sect */ 1637 drive->media = ide_disk; 1638 drive->ready_stat = READY_STAT; 1639 drive->cyl = drive->bios_cyl = vals[0]; 1640 drive->head = drive->bios_head = vals[1]; 1641 drive->sect = drive->bios_sect = vals[2]; 1642 drive->present = 1; 1643 drive->forced_geom = 1; 1644 hwif->noprobe = 0; 1645 goto done; 1646 default: 1647 goto bad_option; 1648 } 1649 } 1650 1651 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e') 1652 goto bad_option; 1653 /* 1654 * Look for bus speed option: "idebus=" 1655 */ 1656 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') { 1657 if (match_parm(&s[6], NULL, vals, 1) != 1) 1658 goto bad_option; 1659 if (vals[0] >= 20 && vals[0] <= 66) { 1660 idebus_parameter = vals[0]; 1661 } else 1662 printk(" -- BAD BUS SPEED! Expected value from 20 to 66"); 1663 goto done; 1664 } 1665 /* 1666 * Look for interface options: "idex=" 1667 */ 1668 if (s[3] >= '0' && s[3] <= max_hwif) { 1669 /* 1670 * Be VERY CAREFUL changing this: note hardcoded indexes below 1671 * (-8, -9, -10) are reserved to ease the hardcoding. 1672 */ 1673 static const char *ide_words[] = { 1674 "noprobe", "serialize", "autotune", "noautotune", 1675 "reset", "dma", "ata66", "minus8", "minus9", 1676 "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb", 1677 "dtc2278", "umc8672", "ali14xx", NULL }; 1678 hw = s[3] - '0'; 1679 hwif = &ide_hwifs[hw]; 1680 i = match_parm(&s[4], ide_words, vals, 3); 1681 1682 /* 1683 * Cryptic check to ensure chipset not already set for hwif. 1684 * Note: we can't depend on hwif->chipset here. 1685 */ 1686 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) { 1687 /* chipset already specified */ 1688 if (is_chipset_set[hw]) 1689 goto bad_option; 1690 if (i > -18 && i <= -11) { 1691 /* these drivers are for "ide0=" only */ 1692 if (hw != 0) 1693 goto bad_hwif; 1694 /* chipset already specified for 2nd port */ 1695 if (is_chipset_set[hw+1]) 1696 goto bad_option; 1697 } 1698 is_chipset_set[hw] = 1; 1699 printk("\n"); 1700 } 1701 1702 switch (i) { 1703#ifdef CONFIG_BLK_DEV_ALI14XX 1704 case -17: /* "ali14xx" */ 1705 probe_ali14xx = 1; 1706 goto done; 1707#endif 1708#ifdef CONFIG_BLK_DEV_UMC8672 1709 case -16: /* "umc8672" */ 1710 probe_umc8672 = 1; 1711 goto done; 1712#endif 1713#ifdef CONFIG_BLK_DEV_DTC2278 1714 case -15: /* "dtc2278" */ 1715 probe_dtc2278 = 1; 1716 goto done; 1717#endif 1718#ifdef CONFIG_BLK_DEV_CMD640 1719 case -14: /* "cmd640_vlb" */ 1720 { 1721 extern int cmd640_vlb; /* flag for cmd640.c */ 1722 cmd640_vlb = 1; 1723 goto done; 1724 } 1725#endif 1726#ifdef CONFIG_BLK_DEV_HT6560B 1727 case -13: /* "ht6560b" */ 1728 probe_ht6560b = 1; 1729 goto done; 1730#endif 1731#ifdef CONFIG_BLK_DEV_QD65XX 1732 case -12: /* "qd65xx" */ 1733 probe_qd65xx = 1; 1734 goto done; 1735#endif 1736#ifdef CONFIG_BLK_DEV_4DRIVES 1737 case -11: /* "four" drives on one set of ports */ 1738 { 1739 ide_hwif_t *mate = &ide_hwifs[hw^1]; 1740 mate->drives[0].select.all ^= 0x20; 1741 mate->drives[1].select.all ^= 0x20; 1742 hwif->chipset = mate->chipset = ide_4drives; 1743 mate->irq = hwif->irq; 1744 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports)); 1745 goto do_serialize; 1746 } 1747#endif /* CONFIG_BLK_DEV_4DRIVES */ 1748 case -10: /* minus10 */ 1749 case -9: /* minus9 */ 1750 case -8: /* minus8 */ 1751 goto bad_option; 1752 case -7: /* ata66 */ 1753#ifdef CONFIG_BLK_DEV_IDEPCI 1754 hwif->udma_four = 1; 1755 goto obsolete_option; 1756#else 1757 goto bad_hwif; 1758#endif 1759 case -6: /* dma */ 1760 hwif->autodma = 1; 1761 goto obsolete_option; 1762 case -5: /* "reset" */ 1763 hwif->reset = 1; 1764 goto obsolete_option; 1765 case -4: /* "noautotune" */ 1766 hwif->drives[0].autotune = IDE_TUNE_NOAUTO; 1767 hwif->drives[1].autotune = IDE_TUNE_NOAUTO; 1768 goto obsolete_option; 1769 case -3: /* "autotune" */ 1770 hwif->drives[0].autotune = IDE_TUNE_AUTO; 1771 hwif->drives[1].autotune = IDE_TUNE_AUTO; 1772 goto obsolete_option; 1773 case -2: /* "serialize" */ 1774 do_serialize: 1775 hwif->mate = &ide_hwifs[hw^1]; 1776 hwif->mate->mate = hwif; 1777 hwif->serialized = hwif->mate->serialized = 1; 1778 goto obsolete_option; 1779 1780 case -1: /* "noprobe" */ 1781 hwif->noprobe = 1; 1782 goto done; 1783 1784 case 1: /* base */ 1785 vals[1] = vals[0] + 0x206; /* default ctl */ 1786 case 2: /* base,ctl */ 1787 vals[2] = 0; /* default irq = probe for it */ 1788 case 3: /* base,ctl,irq */ 1789 hwif->hw.irq = vals[2]; 1790 ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq); 1791 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports)); 1792 hwif->irq = vals[2]; 1793 hwif->noprobe = 0; 1794 hwif->chipset = ide_forced; 1795 goto obsolete_option; 1796 1797 case 0: goto bad_option; 1798 default: 1799 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n"); 1800 return 1; 1801 } 1802 } 1803bad_option: 1804 printk(" -- BAD OPTION\n"); 1805 return 1; 1806obsolete_option: 1807 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n"); 1808 return 1; 1809bad_hwif: 1810 printk("-- NOT SUPPORTED ON ide%d", hw); 1811done: 1812 printk("\n"); 1813 return 1; 1814} 1815 1816extern void __init pnpide_init(void); 1817extern void __exit pnpide_exit(void); 1818extern void __init h8300_ide_init(void); 1819 1820/* 1821 * probe_for_hwifs() finds/initializes "known" IDE interfaces 1822 */ 1823static void __init probe_for_hwifs (void) 1824{ 1825#ifdef CONFIG_BLK_DEV_IDEPCI 1826 ide_scan_pcibus(ide_scan_direction); 1827#endif /* CONFIG_BLK_DEV_IDEPCI */ 1828 1829#ifdef CONFIG_ETRAX_IDE 1830 { 1831 extern void init_e100_ide(void); 1832 init_e100_ide(); 1833 } 1834#endif /* CONFIG_ETRAX_IDE */ 1835#ifdef CONFIG_BLK_DEV_CMD640 1836 { 1837 extern void ide_probe_for_cmd640x(void); 1838 ide_probe_for_cmd640x(); 1839 } 1840#endif /* CONFIG_BLK_DEV_CMD640 */ 1841#ifdef CONFIG_BLK_DEV_IDE_PMAC 1842 { 1843 extern int pmac_ide_probe(void); 1844 (void)pmac_ide_probe(); 1845 } 1846#endif /* CONFIG_BLK_DEV_IDE_PMAC */ 1847#ifdef CONFIG_BLK_DEV_GAYLE 1848 { 1849 extern void gayle_init(void); 1850 gayle_init(); 1851 } 1852#endif /* CONFIG_BLK_DEV_GAYLE */ 1853#ifdef CONFIG_BLK_DEV_FALCON_IDE 1854 { 1855 extern void falconide_init(void); 1856 falconide_init(); 1857 } 1858#endif /* CONFIG_BLK_DEV_FALCON_IDE */ 1859#ifdef CONFIG_BLK_DEV_MAC_IDE 1860 { 1861 extern void macide_init(void); 1862 macide_init(); 1863 } 1864#endif /* CONFIG_BLK_DEV_MAC_IDE */ 1865#ifdef CONFIG_BLK_DEV_Q40IDE 1866 { 1867 extern void q40ide_init(void); 1868 q40ide_init(); 1869 } 1870#endif /* CONFIG_BLK_DEV_Q40IDE */ 1871#ifdef CONFIG_BLK_DEV_BUDDHA 1872 { 1873 extern void buddha_init(void); 1874 buddha_init(); 1875 } 1876#endif /* CONFIG_BLK_DEV_BUDDHA */ 1877#ifdef CONFIG_BLK_DEV_IDEPNP 1878 pnpide_init(); 1879#endif 1880#ifdef CONFIG_H8300 1881 h8300_ide_init(); 1882#endif 1883} 1884 1885void ide_register_subdriver(ide_drive_t *drive, ide_driver_t *driver) 1886{ 1887#ifdef CONFIG_PROC_FS 1888 ide_add_proc_entries(drive->proc, driver->proc, drive); 1889#endif 1890} 1891 1892EXPORT_SYMBOL(ide_register_subdriver); 1893 1894/** 1895 * ide_unregister_subdriver - disconnect drive from driver 1896 * @drive: drive to unplug 1897 * @driver: driver 1898 * 1899 * Disconnect a drive from the driver it was attached to and then 1900 * clean up the various proc files and other objects attached to it. 1901 * 1902 * Takes ide_setting_sem and ide_lock. 1903 * Caller must hold none of the locks. 1904 */ 1905 1906void ide_unregister_subdriver(ide_drive_t *drive, ide_driver_t *driver) 1907{ 1908 unsigned long flags; 1909 1910#ifdef CONFIG_PROC_FS 1911 ide_remove_proc_entries(drive->proc, driver->proc); 1912#endif 1913 down(&ide_setting_sem); 1914 spin_lock_irqsave(&ide_lock, flags); 1915 /* 1916 * ide_setting_sem protects the settings list 1917 * ide_lock protects the use of settings 1918 * 1919 * so we need to hold both, ide_settings_sem because we want to 1920 * modify the settings list, and ide_lock because we cannot take 1921 * a setting out that is being used. 1922 * 1923 * OTOH both ide_{read,write}_setting are only ever used under 1924 * ide_setting_sem. 1925 */ 1926 auto_remove_settings(drive); 1927 spin_unlock_irqrestore(&ide_lock, flags); 1928 up(&ide_setting_sem); 1929} 1930 1931EXPORT_SYMBOL(ide_unregister_subdriver); 1932 1933/* 1934 * Probe module 1935 */ 1936 1937EXPORT_SYMBOL(ide_lock); 1938 1939static int ide_bus_match(struct device *dev, struct device_driver *drv) 1940{ 1941 return 1; 1942} 1943 1944static char *media_string(ide_drive_t *drive) 1945{ 1946 switch (drive->media) { 1947 case ide_disk: 1948 return "disk"; 1949 case ide_cdrom: 1950 return "cdrom"; 1951 case ide_tape: 1952 return "tape"; 1953 case ide_floppy: 1954 return "floppy"; 1955 default: 1956 return "UNKNOWN"; 1957 } 1958} 1959 1960static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf) 1961{ 1962 ide_drive_t *drive = to_ide_device(dev); 1963 return sprintf(buf, "%s\n", media_string(drive)); 1964} 1965 1966static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf) 1967{ 1968 ide_drive_t *drive = to_ide_device(dev); 1969 return sprintf(buf, "%s\n", drive->name); 1970} 1971 1972static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) 1973{ 1974 ide_drive_t *drive = to_ide_device(dev); 1975 return sprintf(buf, "ide:m-%s\n", media_string(drive)); 1976} 1977 1978static struct device_attribute ide_dev_attrs[] = { 1979 __ATTR_RO(media), 1980 __ATTR_RO(drivename), 1981 __ATTR_RO(modalias), 1982 __ATTR_NULL 1983}; 1984 1985static int ide_uevent(struct device *dev, char **envp, int num_envp, 1986 char *buffer, int buffer_size) 1987{ 1988 ide_drive_t *drive = to_ide_device(dev); 1989 int i = 0; 1990 int length = 0; 1991 1992 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length, 1993 "MEDIA=%s", media_string(drive)); 1994 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length, 1995 "DRIVENAME=%s", drive->name); 1996 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length, 1997 "MODALIAS=ide:m-%s", media_string(drive)); 1998 envp[i] = NULL; 1999 return 0; 2000} 2001 2002static int generic_ide_probe(struct device *dev) 2003{ 2004 ide_drive_t *drive = to_ide_device(dev); 2005 ide_driver_t *drv = to_ide_driver(dev->driver); 2006 2007 return drv->probe ? drv->probe(drive) : -ENODEV; 2008} 2009 2010static int generic_ide_remove(struct device *dev) 2011{ 2012 ide_drive_t *drive = to_ide_device(dev); 2013 ide_driver_t *drv = to_ide_driver(dev->driver); 2014 2015 if (drv->remove) 2016 drv->remove(drive); 2017 2018 return 0; 2019} 2020 2021static void generic_ide_shutdown(struct device *dev) 2022{ 2023 ide_drive_t *drive = to_ide_device(dev); 2024 ide_driver_t *drv = to_ide_driver(dev->driver); 2025 2026 if (dev->driver && drv->shutdown) 2027 drv->shutdown(drive); 2028} 2029 2030struct bus_type ide_bus_type = { 2031 .name = "ide", 2032 .match = ide_bus_match, 2033 .uevent = ide_uevent, 2034 .probe = generic_ide_probe, 2035 .remove = generic_ide_remove, 2036 .shutdown = generic_ide_shutdown, 2037 .dev_attrs = ide_dev_attrs, 2038 .suspend = generic_ide_suspend, 2039 .resume = generic_ide_resume, 2040}; 2041 2042EXPORT_SYMBOL_GPL(ide_bus_type); 2043 2044/* 2045 * This is gets invoked once during initialization, to set *everything* up 2046 */ 2047static int __init ide_init(void) 2048{ 2049 int ret; 2050 2051 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n"); 2052 system_bus_speed = ide_system_bus_speed(); 2053 2054 ret = bus_register(&ide_bus_type); 2055 if (ret < 0) { 2056 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret); 2057 return ret; 2058 } 2059 2060 init_ide_data(); 2061 2062#ifdef CONFIG_PROC_FS 2063 proc_ide_root = proc_mkdir("ide", NULL); 2064#endif 2065 2066#ifdef CONFIG_BLK_DEV_ALI14XX 2067 if (probe_ali14xx) 2068 (void)ali14xx_init(); 2069#endif 2070#ifdef CONFIG_BLK_DEV_UMC8672 2071 if (probe_umc8672) 2072 (void)umc8672_init(); 2073#endif 2074#ifdef CONFIG_BLK_DEV_DTC2278 2075 if (probe_dtc2278) 2076 (void)dtc2278_init(); 2077#endif 2078#ifdef CONFIG_BLK_DEV_HT6560B 2079 if (probe_ht6560b) 2080 (void)ht6560b_init(); 2081#endif 2082#ifdef CONFIG_BLK_DEV_QD65XX 2083 if (probe_qd65xx) 2084 (void)qd65xx_init(); 2085#endif 2086 2087 initializing = 1; 2088 /* Probe for special PCI and other "known" interface chipsets. */ 2089 probe_for_hwifs(); 2090 initializing = 0; 2091 2092#ifdef CONFIG_PROC_FS 2093 proc_ide_create(); 2094#endif 2095 return 0; 2096} 2097 2098#ifdef MODULE 2099static char *options = NULL; 2100module_param(options, charp, 0); 2101MODULE_LICENSE("GPL"); 2102 2103static void __init parse_options (char *line) 2104{ 2105 char *next = line; 2106 2107 if (line == NULL || !*line) 2108 return; 2109 while ((line = next) != NULL) { 2110 if ((next = strchr(line,' ')) != NULL) 2111 *next++ = 0; 2112 if (!ide_setup(line)) 2113 printk (KERN_INFO "Unknown option '%s'\n", line); 2114 } 2115} 2116 2117int __init init_module (void) 2118{ 2119 parse_options(options); 2120 return ide_init(); 2121} 2122 2123void __exit cleanup_module (void) 2124{ 2125 int index; 2126 2127 for (index = 0; index < MAX_HWIFS; ++index) 2128 ide_unregister(index); 2129 2130#ifdef CONFIG_BLK_DEV_IDEPNP 2131 pnpide_exit(); 2132#endif 2133 2134#ifdef CONFIG_PROC_FS 2135 proc_ide_destroy(); 2136#endif 2137 2138 bus_unregister(&ide_bus_type); 2139} 2140 2141#else /* !MODULE */ 2142 2143__setup("", ide_setup); 2144 2145module_init(ide_init); 2146 2147#endif /* MODULE */ 2148