ide.c revision 8799620400b0b1a4729d8be828b5bfb3d2a8db1a
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#define _IDE_C /* Tell ide.h it's really us */ 130 131#include <linux/module.h> 132#include <linux/types.h> 133#include <linux/string.h> 134#include <linux/kernel.h> 135#include <linux/timer.h> 136#include <linux/mm.h> 137#include <linux/interrupt.h> 138#include <linux/major.h> 139#include <linux/errno.h> 140#include <linux/genhd.h> 141#include <linux/blkpg.h> 142#include <linux/slab.h> 143#include <linux/init.h> 144#include <linux/pci.h> 145#include <linux/delay.h> 146#include <linux/ide.h> 147#include <linux/completion.h> 148#include <linux/reboot.h> 149#include <linux/cdrom.h> 150#include <linux/seq_file.h> 151#include <linux/device.h> 152#include <linux/bitops.h> 153 154#include <asm/byteorder.h> 155#include <asm/irq.h> 156#include <asm/uaccess.h> 157#include <asm/io.h> 158 159 160/* default maximum number of failures */ 161#define IDE_DEFAULT_MAX_FAILURES 1 162 163static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR, 164 IDE2_MAJOR, IDE3_MAJOR, 165 IDE4_MAJOR, IDE5_MAJOR, 166 IDE6_MAJOR, IDE7_MAJOR, 167 IDE8_MAJOR, IDE9_MAJOR }; 168 169static int idebus_parameter; /* holds the "idebus=" parameter */ 170static int system_bus_speed; /* holds what we think is VESA/PCI bus speed */ 171static int initializing; /* set while initializing built-in drivers */ 172 173DECLARE_MUTEX(ide_cfg_sem); 174 __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock); 175 176#ifdef CONFIG_BLK_DEV_IDEPCI 177static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */ 178#endif 179 180int noautodma = 0; 181 182EXPORT_SYMBOL(noautodma); 183 184#ifdef CONFIG_BLK_DEV_IDEACPI 185int ide_noacpi = 0; 186int ide_noacpitfs = 1; 187int ide_noacpionboot = 1; 188#endif 189 190/* 191 * This is declared extern in ide.h, for access by other IDE modules: 192 */ 193ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */ 194 195EXPORT_SYMBOL(ide_hwifs); 196 197/* 198 * Do not even *think* about calling this! 199 */ 200static void init_hwif_data(ide_hwif_t *hwif, unsigned int index) 201{ 202 unsigned int unit; 203 204 /* bulk initialize hwif & drive info with zeros */ 205 memset(hwif, 0, sizeof(ide_hwif_t)); 206 207 /* fill in any non-zero initial values */ 208 hwif->index = index; 209 hwif->major = ide_hwif_to_major[index]; 210 211 hwif->name[0] = 'i'; 212 hwif->name[1] = 'd'; 213 hwif->name[2] = 'e'; 214 hwif->name[3] = '0' + index; 215 216 hwif->bus_state = BUSSTATE_ON; 217 218 hwif->atapi_dma = 0; /* disable all atapi dma */ 219 hwif->ultra_mask = 0x80; /* disable all ultra */ 220 hwif->mwdma_mask = 0x80; /* disable all mwdma */ 221 hwif->swdma_mask = 0x80; /* disable all swdma */ 222 223 init_completion(&hwif->gendev_rel_comp); 224 225 default_hwif_iops(hwif); 226 default_hwif_transport(hwif); 227 for (unit = 0; unit < MAX_DRIVES; ++unit) { 228 ide_drive_t *drive = &hwif->drives[unit]; 229 230 drive->media = ide_disk; 231 drive->select.all = (unit<<4)|0xa0; 232 drive->hwif = hwif; 233 drive->ctl = 0x08; 234 drive->ready_stat = READY_STAT; 235 drive->bad_wstat = BAD_W_STAT; 236 drive->special.b.recalibrate = 1; 237 drive->special.b.set_geometry = 1; 238 drive->name[0] = 'h'; 239 drive->name[1] = 'd'; 240 drive->name[2] = 'a' + (index * MAX_DRIVES) + unit; 241 drive->max_failures = IDE_DEFAULT_MAX_FAILURES; 242 drive->using_dma = 0; 243 drive->vdma = 0; 244 INIT_LIST_HEAD(&drive->list); 245 init_completion(&drive->gendev_rel_comp); 246 } 247} 248 249static void init_hwif_default(ide_hwif_t *hwif, unsigned int index) 250{ 251 hw_regs_t hw; 252 253 memset(&hw, 0, sizeof(hw_regs_t)); 254 255 ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq); 256 257 memcpy(&hwif->hw, &hw, sizeof(hw)); 258 memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports)); 259 260 hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET]; 261#ifdef CONFIG_BLK_DEV_HD 262 if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA) 263 hwif->noprobe = 1; /* may be overridden by ide_setup() */ 264#endif 265} 266 267extern void ide_arm_init(void); 268 269/* 270 * init_ide_data() sets reasonable default values into all fields 271 * of all instances of the hwifs and drives, but only on the first call. 272 * Subsequent calls have no effect (they don't wipe out anything). 273 * 274 * This routine is normally called at driver initialization time, 275 * but may also be called MUCH earlier during kernel "command-line" 276 * parameter processing. As such, we cannot depend on any other parts 277 * of the kernel (such as memory allocation) to be functioning yet. 278 * 279 * This is too bad, as otherwise we could dynamically allocate the 280 * ide_drive_t structs as needed, rather than always consuming memory 281 * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them. 282 * 283 * FIXME: We should stuff the setup data into __init and copy the 284 * relevant hwifs/allocate them properly during boot. 285 */ 286#define MAGIC_COOKIE 0x12345678 287static void __init init_ide_data (void) 288{ 289 ide_hwif_t *hwif; 290 unsigned int index; 291 static unsigned long magic_cookie = MAGIC_COOKIE; 292 293 if (magic_cookie != MAGIC_COOKIE) 294 return; /* already initialized */ 295 magic_cookie = 0; 296 297 /* Initialise all interface structures */ 298 for (index = 0; index < MAX_HWIFS; ++index) { 299 hwif = &ide_hwifs[index]; 300 init_hwif_data(hwif, index); 301 init_hwif_default(hwif, index); 302#if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI) 303 hwif->irq = hwif->hw.irq = 304 ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]); 305#endif 306 } 307#ifdef CONFIG_IDE_ARM 308 initializing = 1; 309 ide_arm_init(); 310 initializing = 0; 311#endif 312} 313 314/** 315 * ide_system_bus_speed - guess bus speed 316 * 317 * ide_system_bus_speed() returns what we think is the system VESA/PCI 318 * bus speed (in MHz). This is used for calculating interface PIO timings. 319 * The default is 40 for known PCI systems, 50 otherwise. 320 * The "idebus=xx" parameter can be used to override this value. 321 * The actual value to be used is computed/displayed the first time 322 * through. Drivers should only use this as a last resort. 323 * 324 * Returns a guessed speed in MHz. 325 */ 326 327static int ide_system_bus_speed(void) 328{ 329#ifdef CONFIG_PCI 330 static struct pci_device_id pci_default[] = { 331 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) }, 332 { } 333 }; 334#else 335#define pci_default 0 336#endif /* CONFIG_PCI */ 337 338 if (!system_bus_speed) { 339 if (idebus_parameter) { 340 /* user supplied value */ 341 system_bus_speed = idebus_parameter; 342 } else if (pci_dev_present(pci_default)) { 343 /* safe default value for PCI */ 344 system_bus_speed = 33; 345 } else { 346 /* safe default value for VESA and PCI */ 347 system_bus_speed = 50; 348 } 349 printk(KERN_INFO "ide: Assuming %dMHz system bus speed " 350 "for PIO modes%s\n", system_bus_speed, 351 idebus_parameter ? "" : "; override with idebus=xx"); 352 } 353 return system_bus_speed; 354} 355 356#ifdef CONFIG_PROC_FS 357struct proc_dir_entry *proc_ide_root; 358#endif 359 360static struct resource* hwif_request_region(ide_hwif_t *hwif, 361 unsigned long addr, int num) 362{ 363 struct resource *res = request_region(addr, num, hwif->name); 364 365 if (!res) 366 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n", 367 hwif->name, addr, addr+num-1); 368 return res; 369} 370 371/** 372 * ide_hwif_request_regions - request resources for IDE 373 * @hwif: interface to use 374 * 375 * Requests all the needed resources for an interface. 376 * Right now core IDE code does this work which is deeply wrong. 377 * MMIO leaves it to the controller driver, 378 * PIO will migrate this way over time. 379 */ 380 381int ide_hwif_request_regions(ide_hwif_t *hwif) 382{ 383 unsigned long addr; 384 unsigned int i; 385 386 if (hwif->mmio) 387 return 0; 388 addr = hwif->io_ports[IDE_CONTROL_OFFSET]; 389 if (addr && !hwif_request_region(hwif, addr, 1)) 390 goto control_region_busy; 391 hwif->straight8 = 0; 392 addr = hwif->io_ports[IDE_DATA_OFFSET]; 393 if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) { 394 if (!hwif_request_region(hwif, addr, 8)) 395 goto data_region_busy; 396 hwif->straight8 = 1; 397 return 0; 398 } 399 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) { 400 addr = hwif->io_ports[i]; 401 if (!hwif_request_region(hwif, addr, 1)) { 402 while (--i) 403 release_region(addr, 1); 404 goto data_region_busy; 405 } 406 } 407 return 0; 408 409data_region_busy: 410 addr = hwif->io_ports[IDE_CONTROL_OFFSET]; 411 if (addr) 412 release_region(addr, 1); 413control_region_busy: 414 /* If any errors are return, we drop the hwif interface. */ 415 return -EBUSY; 416} 417 418/** 419 * ide_hwif_release_regions - free IDE resources 420 * 421 * Note that we only release the standard ports, 422 * and do not even try to handle any extra ports 423 * allocated for weird IDE interface chipsets. 424 * 425 * Note also that we don't yet handle mmio resources here. More 426 * importantly our caller should be doing this so we need to 427 * restructure this as a helper function for drivers. 428 */ 429 430void ide_hwif_release_regions(ide_hwif_t *hwif) 431{ 432 u32 i = 0; 433 434 if (hwif->mmio) 435 return; 436 if (hwif->io_ports[IDE_CONTROL_OFFSET]) 437 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1); 438 if (hwif->straight8) { 439 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8); 440 return; 441 } 442 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) 443 if (hwif->io_ports[i]) 444 release_region(hwif->io_ports[i], 1); 445} 446 447/** 448 * ide_hwif_restore - restore hwif to template 449 * @hwif: hwif to update 450 * @tmp_hwif: template 451 * 452 * Restore hwif to a previous state by copying most settings 453 * from the template. 454 */ 455 456static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif) 457{ 458 hwif->hwgroup = tmp_hwif->hwgroup; 459 460 hwif->gendev.parent = tmp_hwif->gendev.parent; 461 462 hwif->proc = tmp_hwif->proc; 463 464 hwif->major = tmp_hwif->major; 465 hwif->straight8 = tmp_hwif->straight8; 466 hwif->bus_state = tmp_hwif->bus_state; 467 468 hwif->atapi_dma = tmp_hwif->atapi_dma; 469 hwif->ultra_mask = tmp_hwif->ultra_mask; 470 hwif->mwdma_mask = tmp_hwif->mwdma_mask; 471 hwif->swdma_mask = tmp_hwif->swdma_mask; 472 473 hwif->chipset = tmp_hwif->chipset; 474 hwif->hold = tmp_hwif->hold; 475 476#ifdef CONFIG_BLK_DEV_IDEPCI 477 hwif->pci_dev = tmp_hwif->pci_dev; 478 hwif->cds = tmp_hwif->cds; 479#endif 480 481 hwif->tuneproc = tmp_hwif->tuneproc; 482 hwif->speedproc = tmp_hwif->speedproc; 483 hwif->selectproc = tmp_hwif->selectproc; 484 hwif->reset_poll = tmp_hwif->reset_poll; 485 hwif->pre_reset = tmp_hwif->pre_reset; 486 hwif->resetproc = tmp_hwif->resetproc; 487 hwif->intrproc = tmp_hwif->intrproc; 488 hwif->maskproc = tmp_hwif->maskproc; 489 hwif->quirkproc = tmp_hwif->quirkproc; 490 hwif->busproc = tmp_hwif->busproc; 491 492 hwif->ata_input_data = tmp_hwif->ata_input_data; 493 hwif->ata_output_data = tmp_hwif->ata_output_data; 494 hwif->atapi_input_bytes = tmp_hwif->atapi_input_bytes; 495 hwif->atapi_output_bytes = tmp_hwif->atapi_output_bytes; 496 497 hwif->dma_setup = tmp_hwif->dma_setup; 498 hwif->dma_exec_cmd = tmp_hwif->dma_exec_cmd; 499 hwif->dma_start = tmp_hwif->dma_start; 500 hwif->ide_dma_end = tmp_hwif->ide_dma_end; 501 hwif->ide_dma_check = tmp_hwif->ide_dma_check; 502 hwif->ide_dma_on = tmp_hwif->ide_dma_on; 503 hwif->dma_off_quietly = tmp_hwif->dma_off_quietly; 504 hwif->ide_dma_test_irq = tmp_hwif->ide_dma_test_irq; 505 hwif->ide_dma_clear_irq = tmp_hwif->ide_dma_clear_irq; 506 hwif->dma_host_on = tmp_hwif->dma_host_on; 507 hwif->dma_host_off = tmp_hwif->dma_host_off; 508 hwif->ide_dma_lostirq = tmp_hwif->ide_dma_lostirq; 509 hwif->ide_dma_timeout = tmp_hwif->ide_dma_timeout; 510 511 hwif->OUTB = tmp_hwif->OUTB; 512 hwif->OUTBSYNC = tmp_hwif->OUTBSYNC; 513 hwif->OUTW = tmp_hwif->OUTW; 514 hwif->OUTSW = tmp_hwif->OUTSW; 515 hwif->OUTSL = tmp_hwif->OUTSL; 516 517 hwif->INB = tmp_hwif->INB; 518 hwif->INW = tmp_hwif->INW; 519 hwif->INSW = tmp_hwif->INSW; 520 hwif->INSL = tmp_hwif->INSL; 521 522 hwif->sg_max_nents = tmp_hwif->sg_max_nents; 523 524 hwif->mmio = tmp_hwif->mmio; 525 hwif->rqsize = tmp_hwif->rqsize; 526 hwif->no_lba48 = tmp_hwif->no_lba48; 527 528#ifndef CONFIG_BLK_DEV_IDECS 529 hwif->irq = tmp_hwif->irq; 530#endif 531 532 hwif->dma_base = tmp_hwif->dma_base; 533 hwif->dma_master = tmp_hwif->dma_master; 534 hwif->dma_command = tmp_hwif->dma_command; 535 hwif->dma_vendor1 = tmp_hwif->dma_vendor1; 536 hwif->dma_status = tmp_hwif->dma_status; 537 hwif->dma_vendor3 = tmp_hwif->dma_vendor3; 538 hwif->dma_prdtable = tmp_hwif->dma_prdtable; 539 540 hwif->config_data = tmp_hwif->config_data; 541 hwif->select_data = tmp_hwif->select_data; 542 hwif->extra_base = tmp_hwif->extra_base; 543 hwif->extra_ports = tmp_hwif->extra_ports; 544 hwif->autodma = tmp_hwif->autodma; 545 hwif->udma_four = tmp_hwif->udma_four; 546 547 hwif->hwif_data = tmp_hwif->hwif_data; 548} 549 550/** 551 * ide_unregister - free an IDE interface 552 * @index: index of interface (will change soon to a pointer) 553 * 554 * Perform the final unregister of an IDE interface. At the moment 555 * we don't refcount interfaces so this will also get split up. 556 * 557 * Locking: 558 * The caller must not hold the IDE locks 559 * The drive present/vanishing is not yet properly locked 560 * Take care with the callbacks. These have been split to avoid 561 * deadlocking the IDE layer. The shutdown callback is called 562 * before we take the lock and free resources. It is up to the 563 * caller to be sure there is no pending I/O here, and that 564 * the interface will not be reopened (present/vanishing locking 565 * isn't yet done BTW). After we commit to the final kill we 566 * call the cleanup callback with the ide locks held. 567 * 568 * Unregister restores the hwif structures to the default state. 569 * This is raving bonkers. 570 */ 571 572void ide_unregister(unsigned int index) 573{ 574 ide_drive_t *drive; 575 ide_hwif_t *hwif, *g; 576 static ide_hwif_t tmp_hwif; /* protected by ide_cfg_sem */ 577 ide_hwgroup_t *hwgroup; 578 int irq_count = 0, unit; 579 580 BUG_ON(index >= MAX_HWIFS); 581 582 BUG_ON(in_interrupt()); 583 BUG_ON(irqs_disabled()); 584 down(&ide_cfg_sem); 585 spin_lock_irq(&ide_lock); 586 hwif = &ide_hwifs[index]; 587 if (!hwif->present) 588 goto abort; 589 for (unit = 0; unit < MAX_DRIVES; ++unit) { 590 drive = &hwif->drives[unit]; 591 if (!drive->present) 592 continue; 593 spin_unlock_irq(&ide_lock); 594 device_unregister(&drive->gendev); 595 wait_for_completion(&drive->gendev_rel_comp); 596 spin_lock_irq(&ide_lock); 597 } 598 hwif->present = 0; 599 600 spin_unlock_irq(&ide_lock); 601 602 destroy_proc_ide_interface(hwif); 603 604 hwgroup = hwif->hwgroup; 605 /* 606 * free the irq if we were the only hwif using it 607 */ 608 g = hwgroup->hwif; 609 do { 610 if (g->irq == hwif->irq) 611 ++irq_count; 612 g = g->next; 613 } while (g != hwgroup->hwif); 614 if (irq_count == 1) 615 free_irq(hwif->irq, hwgroup); 616 617 spin_lock_irq(&ide_lock); 618 /* 619 * Note that we only release the standard ports, 620 * and do not even try to handle any extra ports 621 * allocated for weird IDE interface chipsets. 622 */ 623 ide_hwif_release_regions(hwif); 624 625 /* 626 * Remove us from the hwgroup, and free 627 * the hwgroup if we were the only member 628 */ 629 if (hwif->next == hwif) { 630 BUG_ON(hwgroup->hwif != hwif); 631 kfree(hwgroup); 632 } else { 633 /* There is another interface in hwgroup. 634 * Unlink us, and set hwgroup->drive and ->hwif to 635 * something sane. 636 */ 637 g = hwgroup->hwif; 638 while (g->next != hwif) 639 g = g->next; 640 g->next = hwif->next; 641 if (hwgroup->hwif == hwif) { 642 /* Chose a random hwif for hwgroup->hwif. 643 * It's guaranteed that there are no drives 644 * left in the hwgroup. 645 */ 646 BUG_ON(hwgroup->drive != NULL); 647 hwgroup->hwif = g; 648 } 649 BUG_ON(hwgroup->hwif == hwif); 650 } 651 652 /* More messed up locking ... */ 653 spin_unlock_irq(&ide_lock); 654 device_unregister(&hwif->gendev); 655 wait_for_completion(&hwif->gendev_rel_comp); 656 657 /* 658 * Remove us from the kernel's knowledge 659 */ 660 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS); 661 kfree(hwif->sg_table); 662 unregister_blkdev(hwif->major, hwif->name); 663 spin_lock_irq(&ide_lock); 664 665 if (hwif->dma_base) { 666 (void) ide_release_dma(hwif); 667 668 hwif->dma_base = 0; 669 hwif->dma_master = 0; 670 hwif->dma_command = 0; 671 hwif->dma_vendor1 = 0; 672 hwif->dma_status = 0; 673 hwif->dma_vendor3 = 0; 674 hwif->dma_prdtable = 0; 675 676 hwif->extra_base = 0; 677 hwif->extra_ports = 0; 678 } 679 680 /* copy original settings */ 681 tmp_hwif = *hwif; 682 683 /* restore hwif data to pristine status */ 684 init_hwif_data(hwif, index); 685 init_hwif_default(hwif, index); 686 687 ide_hwif_restore(hwif, &tmp_hwif); 688 689abort: 690 spin_unlock_irq(&ide_lock); 691 up(&ide_cfg_sem); 692} 693 694EXPORT_SYMBOL(ide_unregister); 695 696 697/** 698 * ide_setup_ports - set up IDE interface ports 699 * @hw: register descriptions 700 * @base: base register 701 * @offsets: table of register offsets 702 * @ctrl: control register 703 * @ack_irq: IRQ ack 704 * @irq: interrupt lie 705 * 706 * Setup hw_regs_t structure described by parameters. You 707 * may set up the hw structure yourself OR use this routine to 708 * do it for you. This is basically a helper 709 * 710 */ 711 712void ide_setup_ports ( hw_regs_t *hw, 713 unsigned long base, int *offsets, 714 unsigned long ctrl, unsigned long intr, 715 ide_ack_intr_t *ack_intr, 716/* 717 * ide_io_ops_t *iops, 718 */ 719 int irq) 720{ 721 int i; 722 723 memset(hw, 0, sizeof(hw_regs_t)); 724 for (i = 0; i < IDE_NR_PORTS; i++) { 725 if (offsets[i] == -1) { 726 switch(i) { 727 case IDE_CONTROL_OFFSET: 728 hw->io_ports[i] = ctrl; 729 break; 730#if defined(CONFIG_AMIGA) || defined(CONFIG_MAC) 731 case IDE_IRQ_OFFSET: 732 hw->io_ports[i] = intr; 733 break; 734#endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */ 735 default: 736 hw->io_ports[i] = 0; 737 break; 738 } 739 } else { 740 hw->io_ports[i] = base + offsets[i]; 741 } 742 } 743 hw->irq = irq; 744 hw->dma = NO_DMA; 745 hw->ack_intr = ack_intr; 746/* 747 * hw->iops = iops; 748 */ 749} 750 751/** 752 * ide_register_hw_with_fixup - register IDE interface 753 * @hw: hardware registers 754 * @hwifp: pointer to returned hwif 755 * @fixup: fixup function 756 * 757 * Register an IDE interface, specifying exactly the registers etc. 758 * Set init=1 iff calling before probes have taken place. 759 * 760 * Returns -1 on error. 761 */ 762 763int ide_register_hw_with_fixup(hw_regs_t *hw, ide_hwif_t **hwifp, void(*fixup)(ide_hwif_t *hwif)) 764{ 765 int index, retry = 1; 766 ide_hwif_t *hwif; 767 768 do { 769 for (index = 0; index < MAX_HWIFS; ++index) { 770 hwif = &ide_hwifs[index]; 771 if (hwif->hw.io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET]) 772 goto found; 773 } 774 for (index = 0; index < MAX_HWIFS; ++index) { 775 hwif = &ide_hwifs[index]; 776 if (hwif->hold) 777 continue; 778 if ((!hwif->present && !hwif->mate && !initializing) || 779 (!hwif->hw.io_ports[IDE_DATA_OFFSET] && initializing)) 780 goto found; 781 } 782 for (index = 0; index < MAX_HWIFS; index++) 783 ide_unregister(index); 784 } while (retry--); 785 return -1; 786found: 787 if (hwif->present) 788 ide_unregister(index); 789 else if (!hwif->hold) { 790 init_hwif_data(hwif, index); 791 init_hwif_default(hwif, index); 792 } 793 if (hwif->present) 794 return -1; 795 memcpy(&hwif->hw, hw, sizeof(*hw)); 796 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports)); 797 hwif->irq = hw->irq; 798 hwif->noprobe = 0; 799 hwif->chipset = hw->chipset; 800 hwif->gendev.parent = hw->dev; 801 802 if (!initializing) { 803 probe_hwif_init_with_fixup(hwif, fixup); 804 create_proc_ide_interfaces(); 805 } 806 807 if (hwifp) 808 *hwifp = hwif; 809 810 return (initializing || hwif->present) ? index : -1; 811} 812 813EXPORT_SYMBOL(ide_register_hw_with_fixup); 814 815int ide_register_hw(hw_regs_t *hw, ide_hwif_t **hwifp) 816{ 817 return ide_register_hw_with_fixup(hw, hwifp, NULL); 818} 819 820EXPORT_SYMBOL(ide_register_hw); 821 822/* 823 * Locks for IDE setting functionality 824 */ 825 826DECLARE_MUTEX(ide_setting_sem); 827 828/** 829 * __ide_add_setting - add an ide setting option 830 * @drive: drive to use 831 * @name: setting name 832 * @rw: true if the function is read write 833 * @read_ioctl: function to call on read 834 * @write_ioctl: function to call on write 835 * @data_type: type of data 836 * @min: range minimum 837 * @max: range maximum 838 * @mul_factor: multiplication scale 839 * @div_factor: divison scale 840 * @data: private data field 841 * @set: setting 842 * @auto_remove: setting auto removal flag 843 * 844 * Removes the setting named from the device if it is present. 845 * The function takes the settings_lock to protect against 846 * parallel changes. This function must not be called from IRQ 847 * context. Returns 0 on success or -1 on failure. 848 * 849 * BUGS: This code is seriously over-engineered. There is also 850 * magic about how the driver specific features are setup. If 851 * a driver is attached we assume the driver settings are auto 852 * remove. 853 */ 854 855static 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) 856{ 857 ide_settings_t **p = (ide_settings_t **) &drive->settings, *setting = NULL; 858 859 down(&ide_setting_sem); 860 while ((*p) && strcmp((*p)->name, name) < 0) 861 p = &((*p)->next); 862 if ((setting = kzalloc(sizeof(*setting), GFP_KERNEL)) == NULL) 863 goto abort; 864 if ((setting->name = kmalloc(strlen(name) + 1, GFP_KERNEL)) == NULL) 865 goto abort; 866 strcpy(setting->name, name); 867 setting->rw = rw; 868 setting->read_ioctl = read_ioctl; 869 setting->write_ioctl = write_ioctl; 870 setting->data_type = data_type; 871 setting->min = min; 872 setting->max = max; 873 setting->mul_factor = mul_factor; 874 setting->div_factor = div_factor; 875 setting->data = data; 876 setting->set = set; 877 878 setting->next = *p; 879 if (auto_remove) 880 setting->auto_remove = 1; 881 *p = setting; 882 up(&ide_setting_sem); 883 return 0; 884abort: 885 up(&ide_setting_sem); 886 kfree(setting); 887 return -1; 888} 889 890int 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) 891{ 892 return __ide_add_setting(drive, name, rw, read_ioctl, write_ioctl, data_type, min, max, mul_factor, div_factor, data, set, 1); 893} 894 895EXPORT_SYMBOL(ide_add_setting); 896 897/** 898 * __ide_remove_setting - remove an ide setting option 899 * @drive: drive to use 900 * @name: setting name 901 * 902 * Removes the setting named from the device if it is present. 903 * The caller must hold the setting semaphore. 904 */ 905 906static void __ide_remove_setting (ide_drive_t *drive, char *name) 907{ 908 ide_settings_t **p, *setting; 909 910 p = (ide_settings_t **) &drive->settings; 911 912 while ((*p) && strcmp((*p)->name, name)) 913 p = &((*p)->next); 914 if ((setting = (*p)) == NULL) 915 return; 916 917 (*p) = setting->next; 918 919 kfree(setting->name); 920 kfree(setting); 921} 922 923/** 924 * ide_find_setting_by_ioctl - find a drive specific ioctl 925 * @drive: drive to scan 926 * @cmd: ioctl command to handle 927 * 928 * Scan's the device setting table for a matching entry and returns 929 * this or NULL if no entry is found. The caller must hold the 930 * setting semaphore 931 */ 932 933static ide_settings_t *ide_find_setting_by_ioctl (ide_drive_t *drive, int cmd) 934{ 935 ide_settings_t *setting = drive->settings; 936 937 while (setting) { 938 if (setting->read_ioctl == cmd || setting->write_ioctl == cmd) 939 break; 940 setting = setting->next; 941 } 942 943 return setting; 944} 945 946/** 947 * ide_find_setting_by_name - find a drive specific setting 948 * @drive: drive to scan 949 * @name: setting name 950 * 951 * Scan's the device setting table for a matching entry and returns 952 * this or NULL if no entry is found. The caller must hold the 953 * setting semaphore 954 */ 955 956ide_settings_t *ide_find_setting_by_name (ide_drive_t *drive, char *name) 957{ 958 ide_settings_t *setting = drive->settings; 959 960 while (setting) { 961 if (strcmp(setting->name, name) == 0) 962 break; 963 setting = setting->next; 964 } 965 return setting; 966} 967 968/** 969 * auto_remove_settings - remove driver specific settings 970 * @drive: drive 971 * 972 * Automatically remove all the driver specific settings for this 973 * drive. This function may not be called from IRQ context. The 974 * caller must hold ide_setting_sem. 975 */ 976 977static void auto_remove_settings (ide_drive_t *drive) 978{ 979 ide_settings_t *setting; 980repeat: 981 setting = drive->settings; 982 while (setting) { 983 if (setting->auto_remove) { 984 __ide_remove_setting(drive, setting->name); 985 goto repeat; 986 } 987 setting = setting->next; 988 } 989} 990 991/** 992 * ide_read_setting - read an IDE setting 993 * @drive: drive to read from 994 * @setting: drive setting 995 * 996 * Read a drive setting and return the value. The caller 997 * must hold the ide_setting_sem when making this call. 998 * 999 * BUGS: the data return and error are the same return value 1000 * so an error -EINVAL and true return of the same value cannot 1001 * be told apart 1002 */ 1003 1004int ide_read_setting (ide_drive_t *drive, ide_settings_t *setting) 1005{ 1006 int val = -EINVAL; 1007 unsigned long flags; 1008 1009 if ((setting->rw & SETTING_READ)) { 1010 spin_lock_irqsave(&ide_lock, flags); 1011 switch(setting->data_type) { 1012 case TYPE_BYTE: 1013 val = *((u8 *) setting->data); 1014 break; 1015 case TYPE_SHORT: 1016 val = *((u16 *) setting->data); 1017 break; 1018 case TYPE_INT: 1019 case TYPE_INTA: 1020 val = *((u32 *) setting->data); 1021 break; 1022 } 1023 spin_unlock_irqrestore(&ide_lock, flags); 1024 } 1025 return val; 1026} 1027 1028/** 1029 * ide_spin_wait_hwgroup - wait for group 1030 * @drive: drive in the group 1031 * 1032 * Wait for an IDE device group to go non busy and then return 1033 * holding the ide_lock which guards the hwgroup->busy status 1034 * and right to use it. 1035 */ 1036 1037int ide_spin_wait_hwgroup (ide_drive_t *drive) 1038{ 1039 ide_hwgroup_t *hwgroup = HWGROUP(drive); 1040 unsigned long timeout = jiffies + (3 * HZ); 1041 1042 spin_lock_irq(&ide_lock); 1043 1044 while (hwgroup->busy) { 1045 unsigned long lflags; 1046 spin_unlock_irq(&ide_lock); 1047 local_irq_set(lflags); 1048 if (time_after(jiffies, timeout)) { 1049 local_irq_restore(lflags); 1050 printk(KERN_ERR "%s: channel busy\n", drive->name); 1051 return -EBUSY; 1052 } 1053 local_irq_restore(lflags); 1054 spin_lock_irq(&ide_lock); 1055 } 1056 return 0; 1057} 1058 1059EXPORT_SYMBOL(ide_spin_wait_hwgroup); 1060 1061/** 1062 * ide_write_setting - read an IDE setting 1063 * @drive: drive to read from 1064 * @setting: drive setting 1065 * @val: value 1066 * 1067 * Write a drive setting if it is possible. The caller 1068 * must hold the ide_setting_sem when making this call. 1069 * 1070 * BUGS: the data return and error are the same return value 1071 * so an error -EINVAL and true return of the same value cannot 1072 * be told apart 1073 * 1074 * FIXME: This should be changed to enqueue a special request 1075 * to the driver to change settings, and then wait on a sema for completion. 1076 * The current scheme of polling is kludgy, though safe enough. 1077 */ 1078 1079int ide_write_setting (ide_drive_t *drive, ide_settings_t *setting, int val) 1080{ 1081 int i; 1082 u32 *p; 1083 1084 if (!capable(CAP_SYS_ADMIN)) 1085 return -EACCES; 1086 if (!(setting->rw & SETTING_WRITE)) 1087 return -EPERM; 1088 if (val < setting->min || val > setting->max) 1089 return -EINVAL; 1090 if (setting->set) 1091 return setting->set(drive, val); 1092 if (ide_spin_wait_hwgroup(drive)) 1093 return -EBUSY; 1094 switch (setting->data_type) { 1095 case TYPE_BYTE: 1096 *((u8 *) setting->data) = val; 1097 break; 1098 case TYPE_SHORT: 1099 *((u16 *) setting->data) = val; 1100 break; 1101 case TYPE_INT: 1102 *((u32 *) setting->data) = val; 1103 break; 1104 case TYPE_INTA: 1105 p = (u32 *) setting->data; 1106 for (i = 0; i < 1 << PARTN_BITS; i++, p++) 1107 *p = val; 1108 break; 1109 } 1110 spin_unlock_irq(&ide_lock); 1111 return 0; 1112} 1113 1114static int set_io_32bit(ide_drive_t *drive, int arg) 1115{ 1116 drive->io_32bit = arg; 1117#ifdef CONFIG_BLK_DEV_DTC2278 1118 if (HWIF(drive)->chipset == ide_dtc2278) 1119 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg; 1120#endif /* CONFIG_BLK_DEV_DTC2278 */ 1121 return 0; 1122} 1123 1124static int set_using_dma (ide_drive_t *drive, int arg) 1125{ 1126#ifdef CONFIG_BLK_DEV_IDEDMA 1127 ide_hwif_t *hwif = drive->hwif; 1128 int err = -EPERM; 1129 1130 if (!drive->id || !(drive->id->capability & 1)) 1131 goto out; 1132 1133 if (hwif->ide_dma_check == NULL) 1134 goto out; 1135 1136 err = -EBUSY; 1137 if (ide_spin_wait_hwgroup(drive)) 1138 goto out; 1139 /* 1140 * set ->busy flag, unlock and let it ride 1141 */ 1142 hwif->hwgroup->busy = 1; 1143 spin_unlock_irq(&ide_lock); 1144 1145 err = 0; 1146 1147 if (arg) { 1148 if (ide_set_dma(drive) || hwif->ide_dma_on(drive)) 1149 err = -EIO; 1150 } else 1151 ide_dma_off(drive); 1152 1153 /* 1154 * lock, clear ->busy flag and unlock before leaving 1155 */ 1156 spin_lock_irq(&ide_lock); 1157 hwif->hwgroup->busy = 0; 1158 spin_unlock_irq(&ide_lock); 1159out: 1160 return err; 1161#else 1162 return -EPERM; 1163#endif 1164} 1165 1166static int set_pio_mode (ide_drive_t *drive, int arg) 1167{ 1168 struct request rq; 1169 1170 if (!HWIF(drive)->tuneproc) 1171 return -ENOSYS; 1172 if (drive->special.b.set_tune) 1173 return -EBUSY; 1174 ide_init_drive_cmd(&rq); 1175 drive->tune_req = (u8) arg; 1176 drive->special.b.set_tune = 1; 1177 (void) ide_do_drive_cmd(drive, &rq, ide_wait); 1178 return 0; 1179} 1180 1181static int set_xfer_rate (ide_drive_t *drive, int arg) 1182{ 1183 int err = ide_wait_cmd(drive, 1184 WIN_SETFEATURES, (u8) arg, 1185 SETFEATURES_XFER, 0, NULL); 1186 1187 if (!err && arg) { 1188 ide_set_xfer_rate(drive, (u8) arg); 1189 ide_driveid_update(drive); 1190 } 1191 return err; 1192} 1193 1194/** 1195 * ide_add_generic_settings - generic ide settings 1196 * @drive: drive being configured 1197 * 1198 * Add the generic parts of the system settings to the /proc files and 1199 * ioctls for this IDE device. The caller must not be holding the 1200 * ide_setting_sem. 1201 */ 1202 1203void ide_add_generic_settings (ide_drive_t *drive) 1204{ 1205/* 1206 * drive setting name read/write access read ioctl write ioctl data type min max mul_factor div_factor data pointer set function 1207 */ 1208 __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); 1209 __ide_add_setting(drive, "keepsettings", SETTING_RW, HDIO_GET_KEEPSETTINGS, HDIO_SET_KEEPSETTINGS, TYPE_BYTE, 0, 1, 1, 1, &drive->keep_settings, NULL, 0); 1210 __ide_add_setting(drive, "nice1", SETTING_RW, -1, -1, TYPE_BYTE, 0, 1, 1, 1, &drive->nice1, NULL, 0); 1211 __ide_add_setting(drive, "pio_mode", SETTING_WRITE, -1, HDIO_SET_PIO_MODE, TYPE_BYTE, 0, 255, 1, 1, NULL, set_pio_mode, 0); 1212 __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); 1213 __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); 1214 __ide_add_setting(drive, "init_speed", SETTING_RW, -1, -1, TYPE_BYTE, 0, 70, 1, 1, &drive->init_speed, NULL, 0); 1215 __ide_add_setting(drive, "current_speed", SETTING_RW, -1, -1, TYPE_BYTE, 0, 70, 1, 1, &drive->current_speed, set_xfer_rate, 0); 1216 __ide_add_setting(drive, "number", SETTING_RW, -1, -1, TYPE_BYTE, 0, 3, 1, 1, &drive->dn, NULL, 0); 1217} 1218 1219/** 1220 * system_bus_clock - clock guess 1221 * 1222 * External version of the bus clock guess used by very old IDE drivers 1223 * for things like VLB timings. Should not be used. 1224 */ 1225 1226int system_bus_clock (void) 1227{ 1228 return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed )); 1229} 1230 1231EXPORT_SYMBOL(system_bus_clock); 1232 1233static int generic_ide_suspend(struct device *dev, pm_message_t mesg) 1234{ 1235 ide_drive_t *drive = dev->driver_data; 1236 ide_hwif_t *hwif = HWIF(drive); 1237 struct request rq; 1238 struct request_pm_state rqpm; 1239 ide_task_t args; 1240 1241 /* Call ACPI _GTM only once */ 1242 if (!(drive->dn % 2)) 1243 ide_acpi_get_timing(hwif); 1244 1245 memset(&rq, 0, sizeof(rq)); 1246 memset(&rqpm, 0, sizeof(rqpm)); 1247 memset(&args, 0, sizeof(args)); 1248 rq.cmd_type = REQ_TYPE_PM_SUSPEND; 1249 rq.special = &args; 1250 rq.data = &rqpm; 1251 rqpm.pm_step = ide_pm_state_start_suspend; 1252 if (mesg.event == PM_EVENT_PRETHAW) 1253 mesg.event = PM_EVENT_FREEZE; 1254 rqpm.pm_state = mesg.event; 1255 1256 return ide_do_drive_cmd(drive, &rq, ide_wait); 1257} 1258 1259static int generic_ide_resume(struct device *dev) 1260{ 1261 ide_drive_t *drive = dev->driver_data; 1262 ide_hwif_t *hwif = HWIF(drive); 1263 struct request rq; 1264 struct request_pm_state rqpm; 1265 ide_task_t args; 1266 1267 /* Call ACPI _STM only once */ 1268 if (!(drive->dn % 2)) 1269 ide_acpi_push_timing(hwif); 1270 1271 ide_acpi_exec_tfs(drive); 1272 1273 memset(&rq, 0, sizeof(rq)); 1274 memset(&rqpm, 0, sizeof(rqpm)); 1275 memset(&args, 0, sizeof(args)); 1276 rq.cmd_type = REQ_TYPE_PM_RESUME; 1277 rq.special = &args; 1278 rq.data = &rqpm; 1279 rqpm.pm_step = ide_pm_state_start_resume; 1280 rqpm.pm_state = PM_EVENT_ON; 1281 1282 return ide_do_drive_cmd(drive, &rq, ide_head_wait); 1283} 1284 1285int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev, 1286 unsigned int cmd, unsigned long arg) 1287{ 1288 ide_settings_t *setting; 1289 ide_driver_t *drv; 1290 int err = 0; 1291 void __user *p = (void __user *)arg; 1292 1293 down(&ide_setting_sem); 1294 if ((setting = ide_find_setting_by_ioctl(drive, cmd)) != NULL) { 1295 if (cmd == setting->read_ioctl) { 1296 err = ide_read_setting(drive, setting); 1297 up(&ide_setting_sem); 1298 return err >= 0 ? put_user(err, (long __user *)arg) : err; 1299 } else { 1300 if (bdev != bdev->bd_contains) 1301 err = -EINVAL; 1302 else 1303 err = ide_write_setting(drive, setting, arg); 1304 up(&ide_setting_sem); 1305 return err; 1306 } 1307 } 1308 up(&ide_setting_sem); 1309 1310 switch (cmd) { 1311 case HDIO_OBSOLETE_IDENTITY: 1312 case HDIO_GET_IDENTITY: 1313 if (bdev != bdev->bd_contains) 1314 return -EINVAL; 1315 if (drive->id_read == 0) 1316 return -ENOMSG; 1317 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142)) 1318 return -EFAULT; 1319 return 0; 1320 1321 case HDIO_GET_NICE: 1322 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP | 1323 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP | 1324 drive->nice0 << IDE_NICE_0 | 1325 drive->nice1 << IDE_NICE_1 | 1326 drive->nice2 << IDE_NICE_2, 1327 (long __user *) arg); 1328 1329#ifdef CONFIG_IDE_TASK_IOCTL 1330 case HDIO_DRIVE_TASKFILE: 1331 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 1332 return -EACCES; 1333 switch(drive->media) { 1334 case ide_disk: 1335 return ide_taskfile_ioctl(drive, cmd, arg); 1336 default: 1337 return -ENOMSG; 1338 } 1339#endif /* CONFIG_IDE_TASK_IOCTL */ 1340 1341 case HDIO_DRIVE_CMD: 1342 if (!capable(CAP_SYS_RAWIO)) 1343 return -EACCES; 1344 return ide_cmd_ioctl(drive, cmd, arg); 1345 1346 case HDIO_DRIVE_TASK: 1347 if (!capable(CAP_SYS_RAWIO)) 1348 return -EACCES; 1349 return ide_task_ioctl(drive, cmd, arg); 1350 1351 case HDIO_SCAN_HWIF: 1352 { 1353 hw_regs_t hw; 1354 int args[3]; 1355 if (!capable(CAP_SYS_RAWIO)) return -EACCES; 1356 if (copy_from_user(args, p, 3 * sizeof(int))) 1357 return -EFAULT; 1358 memset(&hw, 0, sizeof(hw)); 1359 ide_init_hwif_ports(&hw, (unsigned long) args[0], 1360 (unsigned long) args[1], NULL); 1361 hw.irq = args[2]; 1362 if (ide_register_hw(&hw, NULL) == -1) 1363 return -EIO; 1364 return 0; 1365 } 1366 case HDIO_UNREGISTER_HWIF: 1367 if (!capable(CAP_SYS_RAWIO)) return -EACCES; 1368 /* (arg > MAX_HWIFS) checked in function */ 1369 ide_unregister(arg); 1370 return 0; 1371 case HDIO_SET_NICE: 1372 if (!capable(CAP_SYS_ADMIN)) return -EACCES; 1373 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1)))) 1374 return -EPERM; 1375 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1; 1376 drv = *(ide_driver_t **)bdev->bd_disk->private_data; 1377 if (drive->dsc_overlap && !drv->supports_dsc_overlap) { 1378 drive->dsc_overlap = 0; 1379 return -EPERM; 1380 } 1381 drive->nice1 = (arg >> IDE_NICE_1) & 1; 1382 return 0; 1383 case HDIO_DRIVE_RESET: 1384 { 1385 unsigned long flags; 1386 if (!capable(CAP_SYS_ADMIN)) return -EACCES; 1387 1388 /* 1389 * Abort the current command on the 1390 * group if there is one, taking 1391 * care not to allow anything else 1392 * to be queued and to die on the 1393 * spot if we miss one somehow 1394 */ 1395 1396 spin_lock_irqsave(&ide_lock, flags); 1397 1398 if (HWGROUP(drive)->resetting) { 1399 spin_unlock_irqrestore(&ide_lock, flags); 1400 return -EBUSY; 1401 } 1402 1403 ide_abort(drive, "drive reset"); 1404 1405 BUG_ON(HWGROUP(drive)->handler); 1406 1407 /* Ensure nothing gets queued after we 1408 drop the lock. Reset will clear the busy */ 1409 1410 HWGROUP(drive)->busy = 1; 1411 spin_unlock_irqrestore(&ide_lock, flags); 1412 (void) ide_do_reset(drive); 1413 1414 return 0; 1415 } 1416 1417 case CDROMEJECT: 1418 case CDROMCLOSETRAY: 1419 return scsi_cmd_ioctl(file, bdev->bd_disk, cmd, p); 1420 1421 case HDIO_GET_BUSSTATE: 1422 if (!capable(CAP_SYS_ADMIN)) 1423 return -EACCES; 1424 if (put_user(HWIF(drive)->bus_state, (long __user *)arg)) 1425 return -EFAULT; 1426 return 0; 1427 1428 case HDIO_SET_BUSSTATE: 1429 if (!capable(CAP_SYS_ADMIN)) 1430 return -EACCES; 1431 if (HWIF(drive)->busproc) 1432 return HWIF(drive)->busproc(drive, (int)arg); 1433 return -EOPNOTSUPP; 1434 default: 1435 return -EINVAL; 1436 } 1437} 1438 1439EXPORT_SYMBOL(generic_ide_ioctl); 1440 1441/* 1442 * stridx() returns the offset of c within s, 1443 * or -1 if c is '\0' or not found within s. 1444 */ 1445static int __init stridx (const char *s, char c) 1446{ 1447 char *i = strchr(s, c); 1448 return (i && c) ? i - s : -1; 1449} 1450 1451/* 1452 * match_parm() does parsing for ide_setup(): 1453 * 1454 * 1. the first char of s must be '='. 1455 * 2. if the remainder matches one of the supplied keywords, 1456 * the index (1 based) of the keyword is negated and returned. 1457 * 3. if the remainder is a series of no more than max_vals numbers 1458 * separated by commas, the numbers are saved in vals[] and a 1459 * count of how many were saved is returned. Base10 is assumed, 1460 * and base16 is allowed when prefixed with "0x". 1461 * 4. otherwise, zero is returned. 1462 */ 1463static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals) 1464{ 1465 static const char *decimal = "0123456789"; 1466 static const char *hex = "0123456789abcdef"; 1467 int i, n; 1468 1469 if (*s++ == '=') { 1470 /* 1471 * Try matching against the supplied keywords, 1472 * and return -(index+1) if we match one 1473 */ 1474 if (keywords != NULL) { 1475 for (i = 0; *keywords != NULL; ++i) { 1476 if (!strcmp(s, *keywords++)) 1477 return -(i+1); 1478 } 1479 } 1480 /* 1481 * Look for a series of no more than "max_vals" 1482 * numeric values separated by commas, in base10, 1483 * or base16 when prefixed with "0x". 1484 * Return a count of how many were found. 1485 */ 1486 for (n = 0; (i = stridx(decimal, *s)) >= 0;) { 1487 vals[n] = i; 1488 while ((i = stridx(decimal, *++s)) >= 0) 1489 vals[n] = (vals[n] * 10) + i; 1490 if (*s == 'x' && !vals[n]) { 1491 while ((i = stridx(hex, *++s)) >= 0) 1492 vals[n] = (vals[n] * 0x10) + i; 1493 } 1494 if (++n == max_vals) 1495 break; 1496 if (*s == ',' || *s == ';') 1497 ++s; 1498 } 1499 if (!*s) 1500 return n; 1501 } 1502 return 0; /* zero = nothing matched */ 1503} 1504 1505#ifdef CONFIG_BLK_DEV_ALI14XX 1506extern int probe_ali14xx; 1507extern int ali14xx_init(void); 1508#endif 1509#ifdef CONFIG_BLK_DEV_UMC8672 1510extern int probe_umc8672; 1511extern int umc8672_init(void); 1512#endif 1513#ifdef CONFIG_BLK_DEV_DTC2278 1514extern int probe_dtc2278; 1515extern int dtc2278_init(void); 1516#endif 1517#ifdef CONFIG_BLK_DEV_HT6560B 1518extern int probe_ht6560b; 1519extern int ht6560b_init(void); 1520#endif 1521#ifdef CONFIG_BLK_DEV_QD65XX 1522extern int probe_qd65xx; 1523extern int qd65xx_init(void); 1524#endif 1525 1526static int __initdata is_chipset_set[MAX_HWIFS]; 1527 1528/* 1529 * ide_setup() gets called VERY EARLY during initialization, 1530 * to handle kernel "command line" strings beginning with "hdx=" or "ide". 1531 * 1532 * Remember to update Documentation/ide.txt if you change something here. 1533 */ 1534static int __init ide_setup(char *s) 1535{ 1536 int i, vals[3]; 1537 ide_hwif_t *hwif; 1538 ide_drive_t *drive; 1539 unsigned int hw, unit; 1540 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1); 1541 const char max_hwif = '0' + (MAX_HWIFS - 1); 1542 1543 1544 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */ 1545 return 0; /* driver and not us */ 1546 1547 if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2)) 1548 return 0; 1549 1550 printk(KERN_INFO "ide_setup: %s", s); 1551 init_ide_data (); 1552 1553#ifdef CONFIG_BLK_DEV_IDEDOUBLER 1554 if (!strcmp(s, "ide=doubler")) { 1555 extern int ide_doubler; 1556 1557 printk(" : Enabled support for IDE doublers\n"); 1558 ide_doubler = 1; 1559 return 1; 1560 } 1561#endif /* CONFIG_BLK_DEV_IDEDOUBLER */ 1562 1563 if (!strcmp(s, "ide=nodma")) { 1564 printk(" : Prevented DMA\n"); 1565 noautodma = 1; 1566 return 1; 1567 } 1568 1569#ifdef CONFIG_BLK_DEV_IDEPCI 1570 if (!strcmp(s, "ide=reverse")) { 1571 ide_scan_direction = 1; 1572 printk(" : Enabled support for IDE inverse scan order.\n"); 1573 return 1; 1574 } 1575#endif /* CONFIG_BLK_DEV_IDEPCI */ 1576 1577#ifdef CONFIG_BLK_DEV_IDEACPI 1578 if (!strcmp(s, "ide=noacpi")) { 1579 //printk(" : Disable IDE ACPI support.\n"); 1580 ide_noacpi = 1; 1581 return 1; 1582 } 1583 if (!strcmp(s, "ide=acpigtf")) { 1584 //printk(" : Enable IDE ACPI _GTF support.\n"); 1585 ide_noacpitfs = 0; 1586 return 1; 1587 } 1588 if (!strcmp(s, "ide=acpionboot")) { 1589 //printk(" : Call IDE ACPI methods on boot.\n"); 1590 ide_noacpionboot = 0; 1591 return 1; 1592 } 1593#endif /* CONFIG_BLK_DEV_IDEACPI */ 1594 1595 /* 1596 * Look for drive options: "hdx=" 1597 */ 1598 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) { 1599 const char *hd_words[] = { 1600 "none", "noprobe", "nowerr", "cdrom", "minus5", 1601 "autotune", "noautotune", "minus8", "swapdata", "bswap", 1602 "noflush", "remap", "remap63", "scsi", NULL }; 1603 unit = s[2] - 'a'; 1604 hw = unit / MAX_DRIVES; 1605 unit = unit % MAX_DRIVES; 1606 hwif = &ide_hwifs[hw]; 1607 drive = &hwif->drives[unit]; 1608 if (strncmp(s + 4, "ide-", 4) == 0) { 1609 strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req)); 1610 goto done; 1611 } 1612 switch (match_parm(&s[3], hd_words, vals, 3)) { 1613 case -1: /* "none" */ 1614 case -2: /* "noprobe" */ 1615 drive->noprobe = 1; 1616 goto done; 1617 case -3: /* "nowerr" */ 1618 drive->bad_wstat = BAD_R_STAT; 1619 hwif->noprobe = 0; 1620 goto done; 1621 case -4: /* "cdrom" */ 1622 drive->present = 1; 1623 drive->media = ide_cdrom; 1624 /* an ATAPI device ignores DRDY */ 1625 drive->ready_stat = 0; 1626 hwif->noprobe = 0; 1627 goto done; 1628 case -6: /* "autotune" */ 1629 drive->autotune = IDE_TUNE_AUTO; 1630 goto obsolete_option; 1631 case -7: /* "noautotune" */ 1632 drive->autotune = IDE_TUNE_NOAUTO; 1633 goto obsolete_option; 1634 case -9: /* "swapdata" */ 1635 case -10: /* "bswap" */ 1636 drive->bswap = 1; 1637 goto done; 1638 case -11: /* noflush */ 1639 drive->noflush = 1; 1640 goto done; 1641 case -12: /* "remap" */ 1642 drive->remap_0_to_1 = 1; 1643 goto done; 1644 case -13: /* "remap63" */ 1645 drive->sect0 = 63; 1646 goto done; 1647 case -14: /* "scsi" */ 1648 drive->scsi = 1; 1649 goto done; 1650 case 3: /* cyl,head,sect */ 1651 drive->media = ide_disk; 1652 drive->ready_stat = READY_STAT; 1653 drive->cyl = drive->bios_cyl = vals[0]; 1654 drive->head = drive->bios_head = vals[1]; 1655 drive->sect = drive->bios_sect = vals[2]; 1656 drive->present = 1; 1657 drive->forced_geom = 1; 1658 hwif->noprobe = 0; 1659 goto done; 1660 default: 1661 goto bad_option; 1662 } 1663 } 1664 1665 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e') 1666 goto bad_option; 1667 /* 1668 * Look for bus speed option: "idebus=" 1669 */ 1670 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') { 1671 if (match_parm(&s[6], NULL, vals, 1) != 1) 1672 goto bad_option; 1673 if (vals[0] >= 20 && vals[0] <= 66) { 1674 idebus_parameter = vals[0]; 1675 } else 1676 printk(" -- BAD BUS SPEED! Expected value from 20 to 66"); 1677 goto done; 1678 } 1679 /* 1680 * Look for interface options: "idex=" 1681 */ 1682 if (s[3] >= '0' && s[3] <= max_hwif) { 1683 /* 1684 * Be VERY CAREFUL changing this: note hardcoded indexes below 1685 * (-8, -9, -10) are reserved to ease the hardcoding. 1686 */ 1687 static const char *ide_words[] = { 1688 "noprobe", "serialize", "minus3", "minus4", 1689 "reset", "dma", "ata66", "minus8", "minus9", 1690 "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb", 1691 "dtc2278", "umc8672", "ali14xx", NULL }; 1692 hw = s[3] - '0'; 1693 hwif = &ide_hwifs[hw]; 1694 i = match_parm(&s[4], ide_words, vals, 3); 1695 1696 /* 1697 * Cryptic check to ensure chipset not already set for hwif. 1698 * Note: we can't depend on hwif->chipset here. 1699 */ 1700 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) { 1701 /* chipset already specified */ 1702 if (is_chipset_set[hw]) 1703 goto bad_option; 1704 if (i > -18 && i <= -11) { 1705 /* these drivers are for "ide0=" only */ 1706 if (hw != 0) 1707 goto bad_hwif; 1708 /* chipset already specified for 2nd port */ 1709 if (is_chipset_set[hw+1]) 1710 goto bad_option; 1711 } 1712 is_chipset_set[hw] = 1; 1713 printk("\n"); 1714 } 1715 1716 switch (i) { 1717#ifdef CONFIG_BLK_DEV_ALI14XX 1718 case -17: /* "ali14xx" */ 1719 probe_ali14xx = 1; 1720 goto done; 1721#endif 1722#ifdef CONFIG_BLK_DEV_UMC8672 1723 case -16: /* "umc8672" */ 1724 probe_umc8672 = 1; 1725 goto done; 1726#endif 1727#ifdef CONFIG_BLK_DEV_DTC2278 1728 case -15: /* "dtc2278" */ 1729 probe_dtc2278 = 1; 1730 goto done; 1731#endif 1732#ifdef CONFIG_BLK_DEV_CMD640 1733 case -14: /* "cmd640_vlb" */ 1734 { 1735 extern int cmd640_vlb; /* flag for cmd640.c */ 1736 cmd640_vlb = 1; 1737 goto done; 1738 } 1739#endif 1740#ifdef CONFIG_BLK_DEV_HT6560B 1741 case -13: /* "ht6560b" */ 1742 probe_ht6560b = 1; 1743 goto done; 1744#endif 1745#ifdef CONFIG_BLK_DEV_QD65XX 1746 case -12: /* "qd65xx" */ 1747 probe_qd65xx = 1; 1748 goto done; 1749#endif 1750#ifdef CONFIG_BLK_DEV_4DRIVES 1751 case -11: /* "four" drives on one set of ports */ 1752 { 1753 ide_hwif_t *mate = &ide_hwifs[hw^1]; 1754 mate->drives[0].select.all ^= 0x20; 1755 mate->drives[1].select.all ^= 0x20; 1756 hwif->chipset = mate->chipset = ide_4drives; 1757 mate->irq = hwif->irq; 1758 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports)); 1759 hwif->mate = mate; 1760 mate->mate = hwif; 1761 hwif->serialized = mate->serialized = 1; 1762 goto obsolete_option; 1763 } 1764#endif /* CONFIG_BLK_DEV_4DRIVES */ 1765 case -10: /* minus10 */ 1766 case -9: /* minus9 */ 1767 case -8: /* minus8 */ 1768 case -4: 1769 case -3: 1770 goto bad_option; 1771 case -7: /* ata66 */ 1772#ifdef CONFIG_BLK_DEV_IDEPCI 1773 hwif->udma_four = 1; 1774 goto obsolete_option; 1775#else 1776 goto bad_hwif; 1777#endif 1778 case -6: /* dma */ 1779 hwif->autodma = 1; 1780 goto obsolete_option; 1781 case -5: /* "reset" */ 1782 hwif->reset = 1; 1783 goto obsolete_option; 1784 case -2: /* "serialize" */ 1785 hwif->mate = &ide_hwifs[hw^1]; 1786 hwif->mate->mate = hwif; 1787 hwif->serialized = hwif->mate->serialized = 1; 1788 goto obsolete_option; 1789 1790 case -1: /* "noprobe" */ 1791 hwif->noprobe = 1; 1792 goto done; 1793 1794 case 1: /* base */ 1795 vals[1] = vals[0] + 0x206; /* default ctl */ 1796 case 2: /* base,ctl */ 1797 vals[2] = 0; /* default irq = probe for it */ 1798 case 3: /* base,ctl,irq */ 1799 hwif->hw.irq = vals[2]; 1800 ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq); 1801 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports)); 1802 hwif->irq = vals[2]; 1803 hwif->noprobe = 0; 1804 hwif->chipset = ide_forced; 1805 goto obsolete_option; 1806 1807 case 0: goto bad_option; 1808 default: 1809 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n"); 1810 return 1; 1811 } 1812 } 1813bad_option: 1814 printk(" -- BAD OPTION\n"); 1815 return 1; 1816obsolete_option: 1817 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n"); 1818 return 1; 1819bad_hwif: 1820 printk("-- NOT SUPPORTED ON ide%d", hw); 1821done: 1822 printk("\n"); 1823 return 1; 1824} 1825 1826extern void __init pnpide_init(void); 1827extern void __exit pnpide_exit(void); 1828extern void __init h8300_ide_init(void); 1829 1830/* 1831 * probe_for_hwifs() finds/initializes "known" IDE interfaces 1832 */ 1833static void __init probe_for_hwifs (void) 1834{ 1835#ifdef CONFIG_BLK_DEV_IDEPCI 1836 ide_scan_pcibus(ide_scan_direction); 1837#endif /* CONFIG_BLK_DEV_IDEPCI */ 1838 1839#ifdef CONFIG_ETRAX_IDE 1840 { 1841 extern void init_e100_ide(void); 1842 init_e100_ide(); 1843 } 1844#endif /* CONFIG_ETRAX_IDE */ 1845#ifdef CONFIG_BLK_DEV_CMD640 1846 { 1847 extern void ide_probe_for_cmd640x(void); 1848 ide_probe_for_cmd640x(); 1849 } 1850#endif /* CONFIG_BLK_DEV_CMD640 */ 1851#ifdef CONFIG_BLK_DEV_IDE_PMAC 1852 { 1853 extern int pmac_ide_probe(void); 1854 (void)pmac_ide_probe(); 1855 } 1856#endif /* CONFIG_BLK_DEV_IDE_PMAC */ 1857#ifdef CONFIG_BLK_DEV_GAYLE 1858 { 1859 extern void gayle_init(void); 1860 gayle_init(); 1861 } 1862#endif /* CONFIG_BLK_DEV_GAYLE */ 1863#ifdef CONFIG_BLK_DEV_FALCON_IDE 1864 { 1865 extern void falconide_init(void); 1866 falconide_init(); 1867 } 1868#endif /* CONFIG_BLK_DEV_FALCON_IDE */ 1869#ifdef CONFIG_BLK_DEV_MAC_IDE 1870 { 1871 extern void macide_init(void); 1872 macide_init(); 1873 } 1874#endif /* CONFIG_BLK_DEV_MAC_IDE */ 1875#ifdef CONFIG_BLK_DEV_Q40IDE 1876 { 1877 extern void q40ide_init(void); 1878 q40ide_init(); 1879 } 1880#endif /* CONFIG_BLK_DEV_Q40IDE */ 1881#ifdef CONFIG_BLK_DEV_BUDDHA 1882 { 1883 extern void buddha_init(void); 1884 buddha_init(); 1885 } 1886#endif /* CONFIG_BLK_DEV_BUDDHA */ 1887#ifdef CONFIG_BLK_DEV_IDEPNP 1888 pnpide_init(); 1889#endif 1890#ifdef CONFIG_H8300 1891 h8300_ide_init(); 1892#endif 1893} 1894 1895void ide_register_subdriver(ide_drive_t *drive, ide_driver_t *driver) 1896{ 1897#ifdef CONFIG_PROC_FS 1898 ide_add_proc_entries(drive->proc, driver->proc, drive); 1899#endif 1900} 1901 1902EXPORT_SYMBOL(ide_register_subdriver); 1903 1904/** 1905 * ide_unregister_subdriver - disconnect drive from driver 1906 * @drive: drive to unplug 1907 * @driver: driver 1908 * 1909 * Disconnect a drive from the driver it was attached to and then 1910 * clean up the various proc files and other objects attached to it. 1911 * 1912 * Takes ide_setting_sem and ide_lock. 1913 * Caller must hold none of the locks. 1914 */ 1915 1916void ide_unregister_subdriver(ide_drive_t *drive, ide_driver_t *driver) 1917{ 1918 unsigned long flags; 1919 1920#ifdef CONFIG_PROC_FS 1921 ide_remove_proc_entries(drive->proc, driver->proc); 1922#endif 1923 down(&ide_setting_sem); 1924 spin_lock_irqsave(&ide_lock, flags); 1925 /* 1926 * ide_setting_sem protects the settings list 1927 * ide_lock protects the use of settings 1928 * 1929 * so we need to hold both, ide_settings_sem because we want to 1930 * modify the settings list, and ide_lock because we cannot take 1931 * a setting out that is being used. 1932 * 1933 * OTOH both ide_{read,write}_setting are only ever used under 1934 * ide_setting_sem. 1935 */ 1936 auto_remove_settings(drive); 1937 spin_unlock_irqrestore(&ide_lock, flags); 1938 up(&ide_setting_sem); 1939} 1940 1941EXPORT_SYMBOL(ide_unregister_subdriver); 1942 1943/* 1944 * Probe module 1945 */ 1946 1947EXPORT_SYMBOL(ide_lock); 1948 1949static int ide_bus_match(struct device *dev, struct device_driver *drv) 1950{ 1951 return 1; 1952} 1953 1954static char *media_string(ide_drive_t *drive) 1955{ 1956 switch (drive->media) { 1957 case ide_disk: 1958 return "disk"; 1959 case ide_cdrom: 1960 return "cdrom"; 1961 case ide_tape: 1962 return "tape"; 1963 case ide_floppy: 1964 return "floppy"; 1965 default: 1966 return "UNKNOWN"; 1967 } 1968} 1969 1970static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf) 1971{ 1972 ide_drive_t *drive = to_ide_device(dev); 1973 return sprintf(buf, "%s\n", media_string(drive)); 1974} 1975 1976static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf) 1977{ 1978 ide_drive_t *drive = to_ide_device(dev); 1979 return sprintf(buf, "%s\n", drive->name); 1980} 1981 1982static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) 1983{ 1984 ide_drive_t *drive = to_ide_device(dev); 1985 return sprintf(buf, "ide:m-%s\n", media_string(drive)); 1986} 1987 1988static struct device_attribute ide_dev_attrs[] = { 1989 __ATTR_RO(media), 1990 __ATTR_RO(drivename), 1991 __ATTR_RO(modalias), 1992 __ATTR_NULL 1993}; 1994 1995static int ide_uevent(struct device *dev, char **envp, int num_envp, 1996 char *buffer, int buffer_size) 1997{ 1998 ide_drive_t *drive = to_ide_device(dev); 1999 int i = 0; 2000 int length = 0; 2001 2002 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length, 2003 "MEDIA=%s", media_string(drive)); 2004 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length, 2005 "DRIVENAME=%s", drive->name); 2006 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length, 2007 "MODALIAS=ide:m-%s", media_string(drive)); 2008 envp[i] = NULL; 2009 return 0; 2010} 2011 2012static int generic_ide_probe(struct device *dev) 2013{ 2014 ide_drive_t *drive = to_ide_device(dev); 2015 ide_driver_t *drv = to_ide_driver(dev->driver); 2016 2017 return drv->probe ? drv->probe(drive) : -ENODEV; 2018} 2019 2020static int generic_ide_remove(struct device *dev) 2021{ 2022 ide_drive_t *drive = to_ide_device(dev); 2023 ide_driver_t *drv = to_ide_driver(dev->driver); 2024 2025 if (drv->remove) 2026 drv->remove(drive); 2027 2028 return 0; 2029} 2030 2031static void generic_ide_shutdown(struct device *dev) 2032{ 2033 ide_drive_t *drive = to_ide_device(dev); 2034 ide_driver_t *drv = to_ide_driver(dev->driver); 2035 2036 if (dev->driver && drv->shutdown) 2037 drv->shutdown(drive); 2038} 2039 2040struct bus_type ide_bus_type = { 2041 .name = "ide", 2042 .match = ide_bus_match, 2043 .uevent = ide_uevent, 2044 .probe = generic_ide_probe, 2045 .remove = generic_ide_remove, 2046 .shutdown = generic_ide_shutdown, 2047 .dev_attrs = ide_dev_attrs, 2048 .suspend = generic_ide_suspend, 2049 .resume = generic_ide_resume, 2050}; 2051 2052EXPORT_SYMBOL_GPL(ide_bus_type); 2053 2054/* 2055 * This is gets invoked once during initialization, to set *everything* up 2056 */ 2057static int __init ide_init(void) 2058{ 2059 int ret; 2060 2061 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n"); 2062 system_bus_speed = ide_system_bus_speed(); 2063 2064 ret = bus_register(&ide_bus_type); 2065 if (ret < 0) { 2066 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret); 2067 return ret; 2068 } 2069 2070 init_ide_data(); 2071 2072#ifdef CONFIG_PROC_FS 2073 proc_ide_root = proc_mkdir("ide", NULL); 2074#endif 2075 2076#ifdef CONFIG_BLK_DEV_ALI14XX 2077 if (probe_ali14xx) 2078 (void)ali14xx_init(); 2079#endif 2080#ifdef CONFIG_BLK_DEV_UMC8672 2081 if (probe_umc8672) 2082 (void)umc8672_init(); 2083#endif 2084#ifdef CONFIG_BLK_DEV_DTC2278 2085 if (probe_dtc2278) 2086 (void)dtc2278_init(); 2087#endif 2088#ifdef CONFIG_BLK_DEV_HT6560B 2089 if (probe_ht6560b) 2090 (void)ht6560b_init(); 2091#endif 2092#ifdef CONFIG_BLK_DEV_QD65XX 2093 if (probe_qd65xx) 2094 (void)qd65xx_init(); 2095#endif 2096 2097 initializing = 1; 2098 /* Probe for special PCI and other "known" interface chipsets. */ 2099 probe_for_hwifs(); 2100 initializing = 0; 2101 2102#ifdef CONFIG_PROC_FS 2103 proc_ide_create(); 2104#endif 2105 return 0; 2106} 2107 2108#ifdef MODULE 2109static char *options = NULL; 2110module_param(options, charp, 0); 2111MODULE_LICENSE("GPL"); 2112 2113static void __init parse_options (char *line) 2114{ 2115 char *next = line; 2116 2117 if (line == NULL || !*line) 2118 return; 2119 while ((line = next) != NULL) { 2120 if ((next = strchr(line,' ')) != NULL) 2121 *next++ = 0; 2122 if (!ide_setup(line)) 2123 printk (KERN_INFO "Unknown option '%s'\n", line); 2124 } 2125} 2126 2127int __init init_module (void) 2128{ 2129 parse_options(options); 2130 return ide_init(); 2131} 2132 2133void __exit cleanup_module (void) 2134{ 2135 int index; 2136 2137 for (index = 0; index < MAX_HWIFS; ++index) 2138 ide_unregister(index); 2139 2140#ifdef CONFIG_BLK_DEV_IDEPNP 2141 pnpide_exit(); 2142#endif 2143 2144#ifdef CONFIG_PROC_FS 2145 proc_ide_destroy(); 2146#endif 2147 2148 bus_unregister(&ide_bus_type); 2149} 2150 2151#else /* !MODULE */ 2152 2153__setup("", ide_setup); 2154 2155module_init(ide_init); 2156 2157#endif /* MODULE */ 2158