ide.c revision ce9b2b0abbf019d5259eb089a1cc256852930f67
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 */ 171 172DECLARE_MUTEX(ide_cfg_sem); 173 __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock); 174 175#ifdef CONFIG_IDEPCI_PCIBUS_ORDER 176static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */ 177#endif 178 179int noautodma = 0; 180 181EXPORT_SYMBOL(noautodma); 182 183#ifdef CONFIG_BLK_DEV_IDEACPI 184int ide_noacpi = 0; 185int ide_noacpitfs = 1; 186int ide_noacpionboot = 1; 187#endif 188 189/* 190 * This is declared extern in ide.h, for access by other IDE modules: 191 */ 192ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */ 193 194EXPORT_SYMBOL(ide_hwifs); 195 196/* 197 * Do not even *think* about calling this! 198 */ 199static void init_hwif_data(ide_hwif_t *hwif, unsigned int index) 200{ 201 unsigned int unit; 202 203 /* bulk initialize hwif & drive info with zeros */ 204 memset(hwif, 0, sizeof(ide_hwif_t)); 205 206 /* fill in any non-zero initial values */ 207 hwif->index = index; 208 hwif->major = ide_hwif_to_major[index]; 209 210 hwif->name[0] = 'i'; 211 hwif->name[1] = 'd'; 212 hwif->name[2] = 'e'; 213 hwif->name[3] = '0' + index; 214 215 hwif->bus_state = BUSSTATE_ON; 216 217 hwif->atapi_dma = 0; /* disable all atapi dma */ 218 219 init_completion(&hwif->gendev_rel_comp); 220 221 default_hwif_iops(hwif); 222 default_hwif_transport(hwif); 223 for (unit = 0; unit < MAX_DRIVES; ++unit) { 224 ide_drive_t *drive = &hwif->drives[unit]; 225 226 drive->media = ide_disk; 227 drive->select.all = (unit<<4)|0xa0; 228 drive->hwif = hwif; 229 drive->ctl = 0x08; 230 drive->ready_stat = READY_STAT; 231 drive->bad_wstat = BAD_W_STAT; 232 drive->special.b.recalibrate = 1; 233 drive->special.b.set_geometry = 1; 234 drive->name[0] = 'h'; 235 drive->name[1] = 'd'; 236 drive->name[2] = 'a' + (index * MAX_DRIVES) + unit; 237 drive->max_failures = IDE_DEFAULT_MAX_FAILURES; 238 drive->using_dma = 0; 239 drive->vdma = 0; 240 INIT_LIST_HEAD(&drive->list); 241 init_completion(&drive->gendev_rel_comp); 242 } 243} 244 245static void init_hwif_default(ide_hwif_t *hwif, unsigned int index) 246{ 247 hw_regs_t hw; 248 249 memset(&hw, 0, sizeof(hw_regs_t)); 250 251 ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq); 252 253 memcpy(&hwif->hw, &hw, sizeof(hw)); 254 memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports)); 255 256 hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET]; 257#ifdef CONFIG_BLK_DEV_HD 258 if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA) 259 hwif->noprobe = 1; /* may be overridden by ide_setup() */ 260#endif 261} 262 263extern void ide_arm_init(void); 264 265/* 266 * init_ide_data() sets reasonable default values into all fields 267 * of all instances of the hwifs and drives, but only on the first call. 268 * Subsequent calls have no effect (they don't wipe out anything). 269 * 270 * This routine is normally called at driver initialization time, 271 * but may also be called MUCH earlier during kernel "command-line" 272 * parameter processing. As such, we cannot depend on any other parts 273 * of the kernel (such as memory allocation) to be functioning yet. 274 * 275 * This is too bad, as otherwise we could dynamically allocate the 276 * ide_drive_t structs as needed, rather than always consuming memory 277 * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them. 278 * 279 * FIXME: We should stuff the setup data into __init and copy the 280 * relevant hwifs/allocate them properly during boot. 281 */ 282#define MAGIC_COOKIE 0x12345678 283static void __init init_ide_data (void) 284{ 285 ide_hwif_t *hwif; 286 unsigned int index; 287 static unsigned long magic_cookie = MAGIC_COOKIE; 288 289 if (magic_cookie != MAGIC_COOKIE) 290 return; /* already initialized */ 291 magic_cookie = 0; 292 293 /* Initialise all interface structures */ 294 for (index = 0; index < MAX_HWIFS; ++index) { 295 hwif = &ide_hwifs[index]; 296 init_hwif_data(hwif, index); 297 init_hwif_default(hwif, index); 298#if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI) 299 hwif->irq = hwif->hw.irq = 300 ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]); 301#endif 302 } 303#ifdef CONFIG_IDE_ARM 304 ide_arm_init(); 305#endif 306} 307 308/** 309 * ide_system_bus_speed - guess bus speed 310 * 311 * ide_system_bus_speed() returns what we think is the system VESA/PCI 312 * bus speed (in MHz). This is used for calculating interface PIO timings. 313 * The default is 40 for known PCI systems, 50 otherwise. 314 * The "idebus=xx" parameter can be used to override this value. 315 * The actual value to be used is computed/displayed the first time 316 * through. Drivers should only use this as a last resort. 317 * 318 * Returns a guessed speed in MHz. 319 */ 320 321static int ide_system_bus_speed(void) 322{ 323#ifdef CONFIG_PCI 324 static struct pci_device_id pci_default[] = { 325 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) }, 326 { } 327 }; 328#else 329#define pci_default 0 330#endif /* CONFIG_PCI */ 331 332 if (!system_bus_speed) { 333 if (idebus_parameter) { 334 /* user supplied value */ 335 system_bus_speed = idebus_parameter; 336 } else if (pci_dev_present(pci_default)) { 337 /* safe default value for PCI */ 338 system_bus_speed = 33; 339 } else { 340 /* safe default value for VESA and PCI */ 341 system_bus_speed = 50; 342 } 343 printk(KERN_INFO "ide: Assuming %dMHz system bus speed " 344 "for PIO modes%s\n", system_bus_speed, 345 idebus_parameter ? "" : "; override with idebus=xx"); 346 } 347 return system_bus_speed; 348} 349 350static struct resource* hwif_request_region(ide_hwif_t *hwif, 351 unsigned long addr, int num) 352{ 353 struct resource *res = request_region(addr, num, hwif->name); 354 355 if (!res) 356 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n", 357 hwif->name, addr, addr+num-1); 358 return res; 359} 360 361/** 362 * ide_hwif_request_regions - request resources for IDE 363 * @hwif: interface to use 364 * 365 * Requests all the needed resources for an interface. 366 * Right now core IDE code does this work which is deeply wrong. 367 * MMIO leaves it to the controller driver, 368 * PIO will migrate this way over time. 369 */ 370 371int ide_hwif_request_regions(ide_hwif_t *hwif) 372{ 373 unsigned long addr; 374 unsigned int i; 375 376 if (hwif->mmio) 377 return 0; 378 addr = hwif->io_ports[IDE_CONTROL_OFFSET]; 379 if (addr && !hwif_request_region(hwif, addr, 1)) 380 goto control_region_busy; 381 hwif->straight8 = 0; 382 addr = hwif->io_ports[IDE_DATA_OFFSET]; 383 if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) { 384 if (!hwif_request_region(hwif, addr, 8)) 385 goto data_region_busy; 386 hwif->straight8 = 1; 387 return 0; 388 } 389 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) { 390 addr = hwif->io_ports[i]; 391 if (!hwif_request_region(hwif, addr, 1)) { 392 while (--i) 393 release_region(addr, 1); 394 goto data_region_busy; 395 } 396 } 397 return 0; 398 399data_region_busy: 400 addr = hwif->io_ports[IDE_CONTROL_OFFSET]; 401 if (addr) 402 release_region(addr, 1); 403control_region_busy: 404 /* If any errors are return, we drop the hwif interface. */ 405 return -EBUSY; 406} 407 408/** 409 * ide_hwif_release_regions - free IDE resources 410 * 411 * Note that we only release the standard ports, 412 * and do not even try to handle any extra ports 413 * allocated for weird IDE interface chipsets. 414 * 415 * Note also that we don't yet handle mmio resources here. More 416 * importantly our caller should be doing this so we need to 417 * restructure this as a helper function for drivers. 418 */ 419 420void ide_hwif_release_regions(ide_hwif_t *hwif) 421{ 422 u32 i = 0; 423 424 if (hwif->mmio) 425 return; 426 if (hwif->io_ports[IDE_CONTROL_OFFSET]) 427 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1); 428 if (hwif->straight8) { 429 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8); 430 return; 431 } 432 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) 433 if (hwif->io_ports[i]) 434 release_region(hwif->io_ports[i], 1); 435} 436 437/** 438 * ide_hwif_restore - restore hwif to template 439 * @hwif: hwif to update 440 * @tmp_hwif: template 441 * 442 * Restore hwif to a previous state by copying most settings 443 * from the template. 444 */ 445 446static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif) 447{ 448 hwif->hwgroup = tmp_hwif->hwgroup; 449 450 hwif->gendev.parent = tmp_hwif->gendev.parent; 451 452 hwif->proc = tmp_hwif->proc; 453 454 hwif->major = tmp_hwif->major; 455 hwif->straight8 = tmp_hwif->straight8; 456 hwif->bus_state = tmp_hwif->bus_state; 457 458 hwif->atapi_dma = tmp_hwif->atapi_dma; 459 hwif->ultra_mask = tmp_hwif->ultra_mask; 460 hwif->mwdma_mask = tmp_hwif->mwdma_mask; 461 hwif->swdma_mask = tmp_hwif->swdma_mask; 462 463 hwif->chipset = tmp_hwif->chipset; 464 hwif->hold = tmp_hwif->hold; 465 466#ifdef CONFIG_BLK_DEV_IDEPCI 467 hwif->pci_dev = tmp_hwif->pci_dev; 468 hwif->cds = tmp_hwif->cds; 469#endif 470 471 hwif->tuneproc = tmp_hwif->tuneproc; 472 hwif->speedproc = tmp_hwif->speedproc; 473 hwif->udma_filter = tmp_hwif->udma_filter; 474 hwif->selectproc = tmp_hwif->selectproc; 475 hwif->reset_poll = tmp_hwif->reset_poll; 476 hwif->pre_reset = tmp_hwif->pre_reset; 477 hwif->resetproc = tmp_hwif->resetproc; 478 hwif->intrproc = tmp_hwif->intrproc; 479 hwif->maskproc = tmp_hwif->maskproc; 480 hwif->quirkproc = tmp_hwif->quirkproc; 481 hwif->busproc = tmp_hwif->busproc; 482 483 hwif->ata_input_data = tmp_hwif->ata_input_data; 484 hwif->ata_output_data = tmp_hwif->ata_output_data; 485 hwif->atapi_input_bytes = tmp_hwif->atapi_input_bytes; 486 hwif->atapi_output_bytes = tmp_hwif->atapi_output_bytes; 487 488 hwif->dma_setup = tmp_hwif->dma_setup; 489 hwif->dma_exec_cmd = tmp_hwif->dma_exec_cmd; 490 hwif->dma_start = tmp_hwif->dma_start; 491 hwif->ide_dma_end = tmp_hwif->ide_dma_end; 492 hwif->ide_dma_check = tmp_hwif->ide_dma_check; 493 hwif->ide_dma_on = tmp_hwif->ide_dma_on; 494 hwif->dma_off_quietly = tmp_hwif->dma_off_quietly; 495 hwif->ide_dma_test_irq = tmp_hwif->ide_dma_test_irq; 496 hwif->ide_dma_clear_irq = tmp_hwif->ide_dma_clear_irq; 497 hwif->dma_host_on = tmp_hwif->dma_host_on; 498 hwif->dma_host_off = tmp_hwif->dma_host_off; 499 hwif->ide_dma_lostirq = tmp_hwif->ide_dma_lostirq; 500 hwif->ide_dma_timeout = tmp_hwif->ide_dma_timeout; 501 502 hwif->OUTB = tmp_hwif->OUTB; 503 hwif->OUTBSYNC = tmp_hwif->OUTBSYNC; 504 hwif->OUTW = tmp_hwif->OUTW; 505 hwif->OUTSW = tmp_hwif->OUTSW; 506 hwif->OUTSL = tmp_hwif->OUTSL; 507 508 hwif->INB = tmp_hwif->INB; 509 hwif->INW = tmp_hwif->INW; 510 hwif->INSW = tmp_hwif->INSW; 511 hwif->INSL = tmp_hwif->INSL; 512 513 hwif->sg_max_nents = tmp_hwif->sg_max_nents; 514 515 hwif->mmio = tmp_hwif->mmio; 516 hwif->rqsize = tmp_hwif->rqsize; 517 hwif->no_lba48 = tmp_hwif->no_lba48; 518 519#ifndef CONFIG_BLK_DEV_IDECS 520 hwif->irq = tmp_hwif->irq; 521#endif 522 523 hwif->dma_base = tmp_hwif->dma_base; 524 hwif->dma_master = tmp_hwif->dma_master; 525 hwif->dma_command = tmp_hwif->dma_command; 526 hwif->dma_vendor1 = tmp_hwif->dma_vendor1; 527 hwif->dma_status = tmp_hwif->dma_status; 528 hwif->dma_vendor3 = tmp_hwif->dma_vendor3; 529 hwif->dma_prdtable = tmp_hwif->dma_prdtable; 530 531 hwif->config_data = tmp_hwif->config_data; 532 hwif->select_data = tmp_hwif->select_data; 533 hwif->extra_base = tmp_hwif->extra_base; 534 hwif->extra_ports = tmp_hwif->extra_ports; 535 hwif->autodma = tmp_hwif->autodma; 536 hwif->udma_four = tmp_hwif->udma_four; 537 538 hwif->hwif_data = tmp_hwif->hwif_data; 539} 540 541/** 542 * ide_unregister - free an IDE interface 543 * @index: index of interface (will change soon to a pointer) 544 * 545 * Perform the final unregister of an IDE interface. At the moment 546 * we don't refcount interfaces so this will also get split up. 547 * 548 * Locking: 549 * The caller must not hold the IDE locks 550 * The drive present/vanishing is not yet properly locked 551 * Take care with the callbacks. These have been split to avoid 552 * deadlocking the IDE layer. The shutdown callback is called 553 * before we take the lock and free resources. It is up to the 554 * caller to be sure there is no pending I/O here, and that 555 * the interface will not be reopened (present/vanishing locking 556 * isn't yet done BTW). After we commit to the final kill we 557 * call the cleanup callback with the ide locks held. 558 * 559 * Unregister restores the hwif structures to the default state. 560 * This is raving bonkers. 561 */ 562 563void ide_unregister(unsigned int index) 564{ 565 ide_drive_t *drive; 566 ide_hwif_t *hwif, *g; 567 static ide_hwif_t tmp_hwif; /* protected by ide_cfg_sem */ 568 ide_hwgroup_t *hwgroup; 569 int irq_count = 0, unit; 570 571 BUG_ON(index >= MAX_HWIFS); 572 573 BUG_ON(in_interrupt()); 574 BUG_ON(irqs_disabled()); 575 down(&ide_cfg_sem); 576 spin_lock_irq(&ide_lock); 577 hwif = &ide_hwifs[index]; 578 if (!hwif->present) 579 goto abort; 580 for (unit = 0; unit < MAX_DRIVES; ++unit) { 581 drive = &hwif->drives[unit]; 582 if (!drive->present) 583 continue; 584 spin_unlock_irq(&ide_lock); 585 device_unregister(&drive->gendev); 586 wait_for_completion(&drive->gendev_rel_comp); 587 spin_lock_irq(&ide_lock); 588 } 589 hwif->present = 0; 590 591 spin_unlock_irq(&ide_lock); 592 593 ide_proc_unregister_port(hwif); 594 595 hwgroup = hwif->hwgroup; 596 /* 597 * free the irq if we were the only hwif using it 598 */ 599 g = hwgroup->hwif; 600 do { 601 if (g->irq == hwif->irq) 602 ++irq_count; 603 g = g->next; 604 } while (g != hwgroup->hwif); 605 if (irq_count == 1) 606 free_irq(hwif->irq, hwgroup); 607 608 spin_lock_irq(&ide_lock); 609 /* 610 * Note that we only release the standard ports, 611 * and do not even try to handle any extra ports 612 * allocated for weird IDE interface chipsets. 613 */ 614 ide_hwif_release_regions(hwif); 615 616 /* 617 * Remove us from the hwgroup, and free 618 * the hwgroup if we were the only member 619 */ 620 if (hwif->next == hwif) { 621 BUG_ON(hwgroup->hwif != hwif); 622 kfree(hwgroup); 623 } else { 624 /* There is another interface in hwgroup. 625 * Unlink us, and set hwgroup->drive and ->hwif to 626 * something sane. 627 */ 628 g = hwgroup->hwif; 629 while (g->next != hwif) 630 g = g->next; 631 g->next = hwif->next; 632 if (hwgroup->hwif == hwif) { 633 /* Chose a random hwif for hwgroup->hwif. 634 * It's guaranteed that there are no drives 635 * left in the hwgroup. 636 */ 637 BUG_ON(hwgroup->drive != NULL); 638 hwgroup->hwif = g; 639 } 640 BUG_ON(hwgroup->hwif == hwif); 641 } 642 643 /* More messed up locking ... */ 644 spin_unlock_irq(&ide_lock); 645 device_unregister(&hwif->gendev); 646 wait_for_completion(&hwif->gendev_rel_comp); 647 648 /* 649 * Remove us from the kernel's knowledge 650 */ 651 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS); 652 kfree(hwif->sg_table); 653 unregister_blkdev(hwif->major, hwif->name); 654 spin_lock_irq(&ide_lock); 655 656 if (hwif->dma_base) { 657 (void) ide_release_dma(hwif); 658 659 hwif->dma_base = 0; 660 hwif->dma_master = 0; 661 hwif->dma_command = 0; 662 hwif->dma_vendor1 = 0; 663 hwif->dma_status = 0; 664 hwif->dma_vendor3 = 0; 665 hwif->dma_prdtable = 0; 666 667 hwif->extra_base = 0; 668 hwif->extra_ports = 0; 669 } 670 671 /* copy original settings */ 672 tmp_hwif = *hwif; 673 674 /* restore hwif data to pristine status */ 675 init_hwif_data(hwif, index); 676 init_hwif_default(hwif, index); 677 678 ide_hwif_restore(hwif, &tmp_hwif); 679 680abort: 681 spin_unlock_irq(&ide_lock); 682 up(&ide_cfg_sem); 683} 684 685EXPORT_SYMBOL(ide_unregister); 686 687 688/** 689 * ide_setup_ports - set up IDE interface ports 690 * @hw: register descriptions 691 * @base: base register 692 * @offsets: table of register offsets 693 * @ctrl: control register 694 * @ack_irq: IRQ ack 695 * @irq: interrupt lie 696 * 697 * Setup hw_regs_t structure described by parameters. You 698 * may set up the hw structure yourself OR use this routine to 699 * do it for you. This is basically a helper 700 * 701 */ 702 703void ide_setup_ports ( hw_regs_t *hw, 704 unsigned long base, int *offsets, 705 unsigned long ctrl, unsigned long intr, 706 ide_ack_intr_t *ack_intr, 707/* 708 * ide_io_ops_t *iops, 709 */ 710 int irq) 711{ 712 int i; 713 714 memset(hw, 0, sizeof(hw_regs_t)); 715 for (i = 0; i < IDE_NR_PORTS; i++) { 716 if (offsets[i] == -1) { 717 switch(i) { 718 case IDE_CONTROL_OFFSET: 719 hw->io_ports[i] = ctrl; 720 break; 721#if defined(CONFIG_AMIGA) || defined(CONFIG_MAC) 722 case IDE_IRQ_OFFSET: 723 hw->io_ports[i] = intr; 724 break; 725#endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */ 726 default: 727 hw->io_ports[i] = 0; 728 break; 729 } 730 } else { 731 hw->io_ports[i] = base + offsets[i]; 732 } 733 } 734 hw->irq = irq; 735 hw->dma = NO_DMA; 736 hw->ack_intr = ack_intr; 737/* 738 * hw->iops = iops; 739 */ 740} 741 742/** 743 * ide_register_hw_with_fixup - register IDE interface 744 * @hw: hardware registers 745 * @initializing: set while initializing built-in drivers 746 * @hwifp: pointer to returned hwif 747 * @fixup: fixup function 748 * 749 * Register an IDE interface, specifying exactly the registers etc. 750 * Set init=1 iff calling before probes have taken place. 751 * 752 * Returns -1 on error. 753 */ 754 755int ide_register_hw_with_fixup(hw_regs_t *hw, int initializing, 756 ide_hwif_t **hwifp, 757 void(*fixup)(ide_hwif_t *hwif)) 758{ 759 int index, retry = 1; 760 ide_hwif_t *hwif; 761 762 do { 763 for (index = 0; index < MAX_HWIFS; ++index) { 764 hwif = &ide_hwifs[index]; 765 if (hwif->hw.io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET]) 766 goto found; 767 } 768 for (index = 0; index < MAX_HWIFS; ++index) { 769 hwif = &ide_hwifs[index]; 770 if (hwif->hold) 771 continue; 772 if ((!hwif->present && !hwif->mate && !initializing) || 773 (!hwif->hw.io_ports[IDE_DATA_OFFSET] && initializing)) 774 goto found; 775 } 776 for (index = 0; index < MAX_HWIFS; index++) 777 ide_unregister(index); 778 } while (retry--); 779 return -1; 780found: 781 if (hwif->present) 782 ide_unregister(index); 783 else if (!hwif->hold) { 784 init_hwif_data(hwif, index); 785 init_hwif_default(hwif, index); 786 } 787 if (hwif->present) 788 return -1; 789 memcpy(&hwif->hw, hw, sizeof(*hw)); 790 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports)); 791 hwif->irq = hw->irq; 792 hwif->noprobe = 0; 793 hwif->chipset = hw->chipset; 794 hwif->gendev.parent = hw->dev; 795 796 if (!initializing) { 797 probe_hwif_init_with_fixup(hwif, fixup); 798 ide_proc_register_port(hwif); 799 } 800 801 if (hwifp) 802 *hwifp = hwif; 803 804 return (initializing || hwif->present) ? index : -1; 805} 806 807EXPORT_SYMBOL(ide_register_hw_with_fixup); 808 809int ide_register_hw(hw_regs_t *hw, int initializing, ide_hwif_t **hwifp) 810{ 811 return ide_register_hw_with_fixup(hw, initializing, hwifp, NULL); 812} 813 814EXPORT_SYMBOL(ide_register_hw); 815 816/* 817 * Locks for IDE setting functionality 818 */ 819 820DECLARE_MUTEX(ide_setting_sem); 821 822EXPORT_SYMBOL_GPL(ide_setting_sem); 823 824/** 825 * ide_spin_wait_hwgroup - wait for group 826 * @drive: drive in the group 827 * 828 * Wait for an IDE device group to go non busy and then return 829 * holding the ide_lock which guards the hwgroup->busy status 830 * and right to use it. 831 */ 832 833int ide_spin_wait_hwgroup (ide_drive_t *drive) 834{ 835 ide_hwgroup_t *hwgroup = HWGROUP(drive); 836 unsigned long timeout = jiffies + (3 * HZ); 837 838 spin_lock_irq(&ide_lock); 839 840 while (hwgroup->busy) { 841 unsigned long lflags; 842 spin_unlock_irq(&ide_lock); 843 local_irq_set(lflags); 844 if (time_after(jiffies, timeout)) { 845 local_irq_restore(lflags); 846 printk(KERN_ERR "%s: channel busy\n", drive->name); 847 return -EBUSY; 848 } 849 local_irq_restore(lflags); 850 spin_lock_irq(&ide_lock); 851 } 852 return 0; 853} 854 855EXPORT_SYMBOL(ide_spin_wait_hwgroup); 856 857int set_io_32bit(ide_drive_t *drive, int arg) 858{ 859 if (drive->no_io_32bit) 860 return -EPERM; 861 862 if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1)) 863 return -EINVAL; 864 865 drive->io_32bit = arg; 866#ifdef CONFIG_BLK_DEV_DTC2278 867 if (HWIF(drive)->chipset == ide_dtc2278) 868 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg; 869#endif /* CONFIG_BLK_DEV_DTC2278 */ 870 return 0; 871} 872 873static int set_ksettings(ide_drive_t *drive, int arg) 874{ 875 if (arg < 0 || arg > 1) 876 return -EINVAL; 877 878 if (ide_spin_wait_hwgroup(drive)) 879 return -EBUSY; 880 drive->keep_settings = arg; 881 spin_unlock_irq(&ide_lock); 882 883 return 0; 884} 885 886int set_using_dma(ide_drive_t *drive, int arg) 887{ 888#ifdef CONFIG_BLK_DEV_IDEDMA 889 ide_hwif_t *hwif = drive->hwif; 890 int err = -EPERM; 891 892 if (arg < 0 || arg > 1) 893 return -EINVAL; 894 895 if (!drive->id || !(drive->id->capability & 1)) 896 goto out; 897 898 if (hwif->ide_dma_check == NULL) 899 goto out; 900 901 err = -EBUSY; 902 if (ide_spin_wait_hwgroup(drive)) 903 goto out; 904 /* 905 * set ->busy flag, unlock and let it ride 906 */ 907 hwif->hwgroup->busy = 1; 908 spin_unlock_irq(&ide_lock); 909 910 err = 0; 911 912 if (arg) { 913 hwif->dma_off_quietly(drive); 914 if (ide_set_dma(drive) || hwif->ide_dma_on(drive)) 915 err = -EIO; 916 } else 917 ide_dma_off(drive); 918 919 /* 920 * lock, clear ->busy flag and unlock before leaving 921 */ 922 spin_lock_irq(&ide_lock); 923 hwif->hwgroup->busy = 0; 924 spin_unlock_irq(&ide_lock); 925out: 926 return err; 927#else 928 if (arg < 0 || arg > 1) 929 return -EINVAL; 930 931 return -EPERM; 932#endif 933} 934 935int set_pio_mode(ide_drive_t *drive, int arg) 936{ 937 struct request rq; 938 939 if (arg < 0 || arg > 255) 940 return -EINVAL; 941 942 if (!HWIF(drive)->tuneproc) 943 return -ENOSYS; 944 if (drive->special.b.set_tune) 945 return -EBUSY; 946 ide_init_drive_cmd(&rq); 947 drive->tune_req = (u8) arg; 948 drive->special.b.set_tune = 1; 949 (void) ide_do_drive_cmd(drive, &rq, ide_wait); 950 return 0; 951} 952 953static int set_unmaskirq(ide_drive_t *drive, int arg) 954{ 955 if (drive->no_unmask) 956 return -EPERM; 957 958 if (arg < 0 || arg > 1) 959 return -EINVAL; 960 961 if (ide_spin_wait_hwgroup(drive)) 962 return -EBUSY; 963 drive->unmask = arg; 964 spin_unlock_irq(&ide_lock); 965 966 return 0; 967} 968 969/** 970 * system_bus_clock - clock guess 971 * 972 * External version of the bus clock guess used by very old IDE drivers 973 * for things like VLB timings. Should not be used. 974 */ 975 976int system_bus_clock (void) 977{ 978 return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed )); 979} 980 981EXPORT_SYMBOL(system_bus_clock); 982 983static int generic_ide_suspend(struct device *dev, pm_message_t mesg) 984{ 985 ide_drive_t *drive = dev->driver_data; 986 ide_hwif_t *hwif = HWIF(drive); 987 struct request rq; 988 struct request_pm_state rqpm; 989 ide_task_t args; 990 991 /* Call ACPI _GTM only once */ 992 if (!(drive->dn % 2)) 993 ide_acpi_get_timing(hwif); 994 995 memset(&rq, 0, sizeof(rq)); 996 memset(&rqpm, 0, sizeof(rqpm)); 997 memset(&args, 0, sizeof(args)); 998 rq.cmd_type = REQ_TYPE_PM_SUSPEND; 999 rq.special = &args; 1000 rq.data = &rqpm; 1001 rqpm.pm_step = ide_pm_state_start_suspend; 1002 if (mesg.event == PM_EVENT_PRETHAW) 1003 mesg.event = PM_EVENT_FREEZE; 1004 rqpm.pm_state = mesg.event; 1005 1006 return ide_do_drive_cmd(drive, &rq, ide_wait); 1007} 1008 1009static int generic_ide_resume(struct device *dev) 1010{ 1011 ide_drive_t *drive = dev->driver_data; 1012 ide_hwif_t *hwif = HWIF(drive); 1013 struct request rq; 1014 struct request_pm_state rqpm; 1015 ide_task_t args; 1016 int err; 1017 1018 /* Call ACPI _STM only once */ 1019 if (!(drive->dn % 2)) 1020 ide_acpi_push_timing(hwif); 1021 1022 ide_acpi_exec_tfs(drive); 1023 1024 memset(&rq, 0, sizeof(rq)); 1025 memset(&rqpm, 0, sizeof(rqpm)); 1026 memset(&args, 0, sizeof(args)); 1027 rq.cmd_type = REQ_TYPE_PM_RESUME; 1028 rq.special = &args; 1029 rq.data = &rqpm; 1030 rqpm.pm_step = ide_pm_state_start_resume; 1031 rqpm.pm_state = PM_EVENT_ON; 1032 1033 err = ide_do_drive_cmd(drive, &rq, ide_head_wait); 1034 1035 if (err == 0 && dev->driver) { 1036 ide_driver_t *drv = to_ide_driver(dev->driver); 1037 1038 if (drv->resume) 1039 drv->resume(drive); 1040 } 1041 1042 return err; 1043} 1044 1045int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev, 1046 unsigned int cmd, unsigned long arg) 1047{ 1048 unsigned long flags; 1049 ide_driver_t *drv; 1050 void __user *p = (void __user *)arg; 1051 int err = 0, (*setfunc)(ide_drive_t *, int); 1052 u8 *val; 1053 1054 switch (cmd) { 1055 case HDIO_GET_32BIT: val = &drive->io_32bit; goto read_val; 1056 case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val; 1057 case HDIO_GET_UNMASKINTR: val = &drive->unmask; goto read_val; 1058 case HDIO_GET_DMA: val = &drive->using_dma; goto read_val; 1059 case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val; 1060 case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val; 1061 case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val; 1062 case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val; 1063 case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val; 1064 } 1065 1066 switch (cmd) { 1067 case HDIO_OBSOLETE_IDENTITY: 1068 case HDIO_GET_IDENTITY: 1069 if (bdev != bdev->bd_contains) 1070 return -EINVAL; 1071 if (drive->id_read == 0) 1072 return -ENOMSG; 1073 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142)) 1074 return -EFAULT; 1075 return 0; 1076 1077 case HDIO_GET_NICE: 1078 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP | 1079 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP | 1080 drive->nice0 << IDE_NICE_0 | 1081 drive->nice1 << IDE_NICE_1 | 1082 drive->nice2 << IDE_NICE_2, 1083 (long __user *) arg); 1084 1085#ifdef CONFIG_IDE_TASK_IOCTL 1086 case HDIO_DRIVE_TASKFILE: 1087 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 1088 return -EACCES; 1089 switch(drive->media) { 1090 case ide_disk: 1091 return ide_taskfile_ioctl(drive, cmd, arg); 1092 default: 1093 return -ENOMSG; 1094 } 1095#endif /* CONFIG_IDE_TASK_IOCTL */ 1096 1097 case HDIO_DRIVE_CMD: 1098 if (!capable(CAP_SYS_RAWIO)) 1099 return -EACCES; 1100 return ide_cmd_ioctl(drive, cmd, arg); 1101 1102 case HDIO_DRIVE_TASK: 1103 if (!capable(CAP_SYS_RAWIO)) 1104 return -EACCES; 1105 return ide_task_ioctl(drive, cmd, arg); 1106 1107 case HDIO_SCAN_HWIF: 1108 { 1109 hw_regs_t hw; 1110 int args[3]; 1111 if (!capable(CAP_SYS_RAWIO)) return -EACCES; 1112 if (copy_from_user(args, p, 3 * sizeof(int))) 1113 return -EFAULT; 1114 memset(&hw, 0, sizeof(hw)); 1115 ide_init_hwif_ports(&hw, (unsigned long) args[0], 1116 (unsigned long) args[1], NULL); 1117 hw.irq = args[2]; 1118 if (ide_register_hw(&hw, 0, NULL) == -1) 1119 return -EIO; 1120 return 0; 1121 } 1122 case HDIO_UNREGISTER_HWIF: 1123 if (!capable(CAP_SYS_RAWIO)) return -EACCES; 1124 /* (arg > MAX_HWIFS) checked in function */ 1125 ide_unregister(arg); 1126 return 0; 1127 case HDIO_SET_NICE: 1128 if (!capable(CAP_SYS_ADMIN)) return -EACCES; 1129 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1)))) 1130 return -EPERM; 1131 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1; 1132 drv = *(ide_driver_t **)bdev->bd_disk->private_data; 1133 if (drive->dsc_overlap && !drv->supports_dsc_overlap) { 1134 drive->dsc_overlap = 0; 1135 return -EPERM; 1136 } 1137 drive->nice1 = (arg >> IDE_NICE_1) & 1; 1138 return 0; 1139 case HDIO_DRIVE_RESET: 1140 { 1141 unsigned long flags; 1142 if (!capable(CAP_SYS_ADMIN)) return -EACCES; 1143 1144 /* 1145 * Abort the current command on the 1146 * group if there is one, taking 1147 * care not to allow anything else 1148 * to be queued and to die on the 1149 * spot if we miss one somehow 1150 */ 1151 1152 spin_lock_irqsave(&ide_lock, flags); 1153 1154 if (HWGROUP(drive)->resetting) { 1155 spin_unlock_irqrestore(&ide_lock, flags); 1156 return -EBUSY; 1157 } 1158 1159 ide_abort(drive, "drive reset"); 1160 1161 BUG_ON(HWGROUP(drive)->handler); 1162 1163 /* Ensure nothing gets queued after we 1164 drop the lock. Reset will clear the busy */ 1165 1166 HWGROUP(drive)->busy = 1; 1167 spin_unlock_irqrestore(&ide_lock, flags); 1168 (void) ide_do_reset(drive); 1169 1170 return 0; 1171 } 1172 1173 case CDROMEJECT: 1174 case CDROMCLOSETRAY: 1175 return scsi_cmd_ioctl(file, bdev->bd_disk, cmd, p); 1176 1177 case HDIO_GET_BUSSTATE: 1178 if (!capable(CAP_SYS_ADMIN)) 1179 return -EACCES; 1180 if (put_user(HWIF(drive)->bus_state, (long __user *)arg)) 1181 return -EFAULT; 1182 return 0; 1183 1184 case HDIO_SET_BUSSTATE: 1185 if (!capable(CAP_SYS_ADMIN)) 1186 return -EACCES; 1187 if (HWIF(drive)->busproc) 1188 return HWIF(drive)->busproc(drive, (int)arg); 1189 return -EOPNOTSUPP; 1190 default: 1191 return -EINVAL; 1192 } 1193 1194read_val: 1195 down(&ide_setting_sem); 1196 spin_lock_irqsave(&ide_lock, flags); 1197 err = *val; 1198 spin_unlock_irqrestore(&ide_lock, flags); 1199 up(&ide_setting_sem); 1200 return err >= 0 ? put_user(err, (long __user *)arg) : err; 1201 1202set_val: 1203 if (bdev != bdev->bd_contains) 1204 err = -EINVAL; 1205 else { 1206 if (!capable(CAP_SYS_ADMIN)) 1207 err = -EACCES; 1208 else { 1209 down(&ide_setting_sem); 1210 err = setfunc(drive, arg); 1211 up(&ide_setting_sem); 1212 } 1213 } 1214 return err; 1215} 1216 1217EXPORT_SYMBOL(generic_ide_ioctl); 1218 1219/* 1220 * stridx() returns the offset of c within s, 1221 * or -1 if c is '\0' or not found within s. 1222 */ 1223static int __init stridx (const char *s, char c) 1224{ 1225 char *i = strchr(s, c); 1226 return (i && c) ? i - s : -1; 1227} 1228 1229/* 1230 * match_parm() does parsing for ide_setup(): 1231 * 1232 * 1. the first char of s must be '='. 1233 * 2. if the remainder matches one of the supplied keywords, 1234 * the index (1 based) of the keyword is negated and returned. 1235 * 3. if the remainder is a series of no more than max_vals numbers 1236 * separated by commas, the numbers are saved in vals[] and a 1237 * count of how many were saved is returned. Base10 is assumed, 1238 * and base16 is allowed when prefixed with "0x". 1239 * 4. otherwise, zero is returned. 1240 */ 1241static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals) 1242{ 1243 static const char *decimal = "0123456789"; 1244 static const char *hex = "0123456789abcdef"; 1245 int i, n; 1246 1247 if (*s++ == '=') { 1248 /* 1249 * Try matching against the supplied keywords, 1250 * and return -(index+1) if we match one 1251 */ 1252 if (keywords != NULL) { 1253 for (i = 0; *keywords != NULL; ++i) { 1254 if (!strcmp(s, *keywords++)) 1255 return -(i+1); 1256 } 1257 } 1258 /* 1259 * Look for a series of no more than "max_vals" 1260 * numeric values separated by commas, in base10, 1261 * or base16 when prefixed with "0x". 1262 * Return a count of how many were found. 1263 */ 1264 for (n = 0; (i = stridx(decimal, *s)) >= 0;) { 1265 vals[n] = i; 1266 while ((i = stridx(decimal, *++s)) >= 0) 1267 vals[n] = (vals[n] * 10) + i; 1268 if (*s == 'x' && !vals[n]) { 1269 while ((i = stridx(hex, *++s)) >= 0) 1270 vals[n] = (vals[n] * 0x10) + i; 1271 } 1272 if (++n == max_vals) 1273 break; 1274 if (*s == ',' || *s == ';') 1275 ++s; 1276 } 1277 if (!*s) 1278 return n; 1279 } 1280 return 0; /* zero = nothing matched */ 1281} 1282 1283#ifdef CONFIG_BLK_DEV_ALI14XX 1284extern int probe_ali14xx; 1285extern int ali14xx_init(void); 1286#endif 1287#ifdef CONFIG_BLK_DEV_UMC8672 1288extern int probe_umc8672; 1289extern int umc8672_init(void); 1290#endif 1291#ifdef CONFIG_BLK_DEV_DTC2278 1292extern int probe_dtc2278; 1293extern int dtc2278_init(void); 1294#endif 1295#ifdef CONFIG_BLK_DEV_HT6560B 1296extern int probe_ht6560b; 1297extern int ht6560b_init(void); 1298#endif 1299#ifdef CONFIG_BLK_DEV_QD65XX 1300extern int probe_qd65xx; 1301extern int qd65xx_init(void); 1302#endif 1303 1304static int __initdata is_chipset_set[MAX_HWIFS]; 1305 1306/* 1307 * ide_setup() gets called VERY EARLY during initialization, 1308 * to handle kernel "command line" strings beginning with "hdx=" or "ide". 1309 * 1310 * Remember to update Documentation/ide.txt if you change something here. 1311 */ 1312static int __init ide_setup(char *s) 1313{ 1314 int i, vals[3]; 1315 ide_hwif_t *hwif; 1316 ide_drive_t *drive; 1317 unsigned int hw, unit; 1318 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1); 1319 const char max_hwif = '0' + (MAX_HWIFS - 1); 1320 1321 1322 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */ 1323 return 0; /* driver and not us */ 1324 1325 if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2)) 1326 return 0; 1327 1328 printk(KERN_INFO "ide_setup: %s", s); 1329 init_ide_data (); 1330 1331#ifdef CONFIG_BLK_DEV_IDEDOUBLER 1332 if (!strcmp(s, "ide=doubler")) { 1333 extern int ide_doubler; 1334 1335 printk(" : Enabled support for IDE doublers\n"); 1336 ide_doubler = 1; 1337 return 1; 1338 } 1339#endif /* CONFIG_BLK_DEV_IDEDOUBLER */ 1340 1341 if (!strcmp(s, "ide=nodma")) { 1342 printk(" : Prevented DMA\n"); 1343 noautodma = 1; 1344 return 1; 1345 } 1346 1347#ifdef CONFIG_IDEPCI_PCIBUS_ORDER 1348 if (!strcmp(s, "ide=reverse")) { 1349 ide_scan_direction = 1; 1350 printk(" : Enabled support for IDE inverse scan order.\n"); 1351 return 1; 1352 } 1353#endif 1354 1355#ifdef CONFIG_BLK_DEV_IDEACPI 1356 if (!strcmp(s, "ide=noacpi")) { 1357 //printk(" : Disable IDE ACPI support.\n"); 1358 ide_noacpi = 1; 1359 return 1; 1360 } 1361 if (!strcmp(s, "ide=acpigtf")) { 1362 //printk(" : Enable IDE ACPI _GTF support.\n"); 1363 ide_noacpitfs = 0; 1364 return 1; 1365 } 1366 if (!strcmp(s, "ide=acpionboot")) { 1367 //printk(" : Call IDE ACPI methods on boot.\n"); 1368 ide_noacpionboot = 0; 1369 return 1; 1370 } 1371#endif /* CONFIG_BLK_DEV_IDEACPI */ 1372 1373 /* 1374 * Look for drive options: "hdx=" 1375 */ 1376 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) { 1377 const char *hd_words[] = { 1378 "none", "noprobe", "nowerr", "cdrom", "minus5", 1379 "autotune", "noautotune", "minus8", "swapdata", "bswap", 1380 "noflush", "remap", "remap63", "scsi", NULL }; 1381 unit = s[2] - 'a'; 1382 hw = unit / MAX_DRIVES; 1383 unit = unit % MAX_DRIVES; 1384 hwif = &ide_hwifs[hw]; 1385 drive = &hwif->drives[unit]; 1386 if (strncmp(s + 4, "ide-", 4) == 0) { 1387 strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req)); 1388 goto done; 1389 } 1390 switch (match_parm(&s[3], hd_words, vals, 3)) { 1391 case -1: /* "none" */ 1392 case -2: /* "noprobe" */ 1393 drive->noprobe = 1; 1394 goto done; 1395 case -3: /* "nowerr" */ 1396 drive->bad_wstat = BAD_R_STAT; 1397 hwif->noprobe = 0; 1398 goto done; 1399 case -4: /* "cdrom" */ 1400 drive->present = 1; 1401 drive->media = ide_cdrom; 1402 /* an ATAPI device ignores DRDY */ 1403 drive->ready_stat = 0; 1404 hwif->noprobe = 0; 1405 goto done; 1406 case -6: /* "autotune" */ 1407 drive->autotune = IDE_TUNE_AUTO; 1408 goto obsolete_option; 1409 case -7: /* "noautotune" */ 1410 drive->autotune = IDE_TUNE_NOAUTO; 1411 goto obsolete_option; 1412 case -9: /* "swapdata" */ 1413 case -10: /* "bswap" */ 1414 drive->bswap = 1; 1415 goto done; 1416 case -11: /* noflush */ 1417 drive->noflush = 1; 1418 goto done; 1419 case -12: /* "remap" */ 1420 drive->remap_0_to_1 = 1; 1421 goto done; 1422 case -13: /* "remap63" */ 1423 drive->sect0 = 63; 1424 goto done; 1425 case -14: /* "scsi" */ 1426 drive->scsi = 1; 1427 goto done; 1428 case 3: /* cyl,head,sect */ 1429 drive->media = ide_disk; 1430 drive->ready_stat = READY_STAT; 1431 drive->cyl = drive->bios_cyl = vals[0]; 1432 drive->head = drive->bios_head = vals[1]; 1433 drive->sect = drive->bios_sect = vals[2]; 1434 drive->present = 1; 1435 drive->forced_geom = 1; 1436 hwif->noprobe = 0; 1437 goto done; 1438 default: 1439 goto bad_option; 1440 } 1441 } 1442 1443 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e') 1444 goto bad_option; 1445 /* 1446 * Look for bus speed option: "idebus=" 1447 */ 1448 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') { 1449 if (match_parm(&s[6], NULL, vals, 1) != 1) 1450 goto bad_option; 1451 if (vals[0] >= 20 && vals[0] <= 66) { 1452 idebus_parameter = vals[0]; 1453 } else 1454 printk(" -- BAD BUS SPEED! Expected value from 20 to 66"); 1455 goto done; 1456 } 1457 /* 1458 * Look for interface options: "idex=" 1459 */ 1460 if (s[3] >= '0' && s[3] <= max_hwif) { 1461 /* 1462 * Be VERY CAREFUL changing this: note hardcoded indexes below 1463 * (-8, -9, -10) are reserved to ease the hardcoding. 1464 */ 1465 static const char *ide_words[] = { 1466 "noprobe", "serialize", "minus3", "minus4", 1467 "reset", "dma", "ata66", "minus8", "minus9", 1468 "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb", 1469 "dtc2278", "umc8672", "ali14xx", NULL }; 1470 hw = s[3] - '0'; 1471 hwif = &ide_hwifs[hw]; 1472 i = match_parm(&s[4], ide_words, vals, 3); 1473 1474 /* 1475 * Cryptic check to ensure chipset not already set for hwif. 1476 * Note: we can't depend on hwif->chipset here. 1477 */ 1478 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) { 1479 /* chipset already specified */ 1480 if (is_chipset_set[hw]) 1481 goto bad_option; 1482 if (i > -18 && i <= -11) { 1483 /* these drivers are for "ide0=" only */ 1484 if (hw != 0) 1485 goto bad_hwif; 1486 /* chipset already specified for 2nd port */ 1487 if (is_chipset_set[hw+1]) 1488 goto bad_option; 1489 } 1490 is_chipset_set[hw] = 1; 1491 printk("\n"); 1492 } 1493 1494 switch (i) { 1495#ifdef CONFIG_BLK_DEV_ALI14XX 1496 case -17: /* "ali14xx" */ 1497 probe_ali14xx = 1; 1498 goto done; 1499#endif 1500#ifdef CONFIG_BLK_DEV_UMC8672 1501 case -16: /* "umc8672" */ 1502 probe_umc8672 = 1; 1503 goto done; 1504#endif 1505#ifdef CONFIG_BLK_DEV_DTC2278 1506 case -15: /* "dtc2278" */ 1507 probe_dtc2278 = 1; 1508 goto done; 1509#endif 1510#ifdef CONFIG_BLK_DEV_CMD640 1511 case -14: /* "cmd640_vlb" */ 1512 { 1513 extern int cmd640_vlb; /* flag for cmd640.c */ 1514 cmd640_vlb = 1; 1515 goto done; 1516 } 1517#endif 1518#ifdef CONFIG_BLK_DEV_HT6560B 1519 case -13: /* "ht6560b" */ 1520 probe_ht6560b = 1; 1521 goto done; 1522#endif 1523#ifdef CONFIG_BLK_DEV_QD65XX 1524 case -12: /* "qd65xx" */ 1525 probe_qd65xx = 1; 1526 goto done; 1527#endif 1528#ifdef CONFIG_BLK_DEV_4DRIVES 1529 case -11: /* "four" drives on one set of ports */ 1530 { 1531 ide_hwif_t *mate = &ide_hwifs[hw^1]; 1532 mate->drives[0].select.all ^= 0x20; 1533 mate->drives[1].select.all ^= 0x20; 1534 hwif->chipset = mate->chipset = ide_4drives; 1535 mate->irq = hwif->irq; 1536 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports)); 1537 hwif->mate = mate; 1538 mate->mate = hwif; 1539 hwif->serialized = mate->serialized = 1; 1540 goto obsolete_option; 1541 } 1542#endif /* CONFIG_BLK_DEV_4DRIVES */ 1543 case -10: /* minus10 */ 1544 case -9: /* minus9 */ 1545 case -8: /* minus8 */ 1546 case -4: 1547 case -3: 1548 goto bad_option; 1549 case -7: /* ata66 */ 1550#ifdef CONFIG_BLK_DEV_IDEPCI 1551 hwif->udma_four = 1; 1552 goto obsolete_option; 1553#else 1554 goto bad_hwif; 1555#endif 1556 case -6: /* dma */ 1557 hwif->autodma = 1; 1558 goto obsolete_option; 1559 case -5: /* "reset" */ 1560 hwif->reset = 1; 1561 goto obsolete_option; 1562 case -2: /* "serialize" */ 1563 hwif->mate = &ide_hwifs[hw^1]; 1564 hwif->mate->mate = hwif; 1565 hwif->serialized = hwif->mate->serialized = 1; 1566 goto obsolete_option; 1567 1568 case -1: /* "noprobe" */ 1569 hwif->noprobe = 1; 1570 goto done; 1571 1572 case 1: /* base */ 1573 vals[1] = vals[0] + 0x206; /* default ctl */ 1574 case 2: /* base,ctl */ 1575 vals[2] = 0; /* default irq = probe for it */ 1576 case 3: /* base,ctl,irq */ 1577 hwif->hw.irq = vals[2]; 1578 ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq); 1579 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports)); 1580 hwif->irq = vals[2]; 1581 hwif->noprobe = 0; 1582 hwif->chipset = ide_forced; 1583 goto obsolete_option; 1584 1585 case 0: goto bad_option; 1586 default: 1587 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n"); 1588 return 1; 1589 } 1590 } 1591bad_option: 1592 printk(" -- BAD OPTION\n"); 1593 return 1; 1594obsolete_option: 1595 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n"); 1596 return 1; 1597bad_hwif: 1598 printk("-- NOT SUPPORTED ON ide%d", hw); 1599done: 1600 printk("\n"); 1601 return 1; 1602} 1603 1604extern void __init pnpide_init(void); 1605extern void __exit pnpide_exit(void); 1606extern void __init h8300_ide_init(void); 1607 1608/* 1609 * probe_for_hwifs() finds/initializes "known" IDE interfaces 1610 */ 1611static void __init probe_for_hwifs (void) 1612{ 1613#ifdef CONFIG_IDEPCI_PCIBUS_ORDER 1614 ide_scan_pcibus(ide_scan_direction); 1615#endif 1616 1617#ifdef CONFIG_ETRAX_IDE 1618 { 1619 extern void init_e100_ide(void); 1620 init_e100_ide(); 1621 } 1622#endif /* CONFIG_ETRAX_IDE */ 1623#ifdef CONFIG_BLK_DEV_CMD640 1624 { 1625 extern void ide_probe_for_cmd640x(void); 1626 ide_probe_for_cmd640x(); 1627 } 1628#endif /* CONFIG_BLK_DEV_CMD640 */ 1629#ifdef CONFIG_BLK_DEV_IDE_PMAC 1630 { 1631 extern int pmac_ide_probe(void); 1632 (void)pmac_ide_probe(); 1633 } 1634#endif /* CONFIG_BLK_DEV_IDE_PMAC */ 1635#ifdef CONFIG_BLK_DEV_GAYLE 1636 { 1637 extern void gayle_init(void); 1638 gayle_init(); 1639 } 1640#endif /* CONFIG_BLK_DEV_GAYLE */ 1641#ifdef CONFIG_BLK_DEV_FALCON_IDE 1642 { 1643 extern void falconide_init(void); 1644 falconide_init(); 1645 } 1646#endif /* CONFIG_BLK_DEV_FALCON_IDE */ 1647#ifdef CONFIG_BLK_DEV_MAC_IDE 1648 { 1649 extern void macide_init(void); 1650 macide_init(); 1651 } 1652#endif /* CONFIG_BLK_DEV_MAC_IDE */ 1653#ifdef CONFIG_BLK_DEV_Q40IDE 1654 { 1655 extern void q40ide_init(void); 1656 q40ide_init(); 1657 } 1658#endif /* CONFIG_BLK_DEV_Q40IDE */ 1659#ifdef CONFIG_BLK_DEV_BUDDHA 1660 { 1661 extern void buddha_init(void); 1662 buddha_init(); 1663 } 1664#endif /* CONFIG_BLK_DEV_BUDDHA */ 1665#ifdef CONFIG_BLK_DEV_IDEPNP 1666 pnpide_init(); 1667#endif 1668#ifdef CONFIG_H8300 1669 h8300_ide_init(); 1670#endif 1671} 1672 1673/* 1674 * Probe module 1675 */ 1676 1677EXPORT_SYMBOL(ide_lock); 1678 1679static int ide_bus_match(struct device *dev, struct device_driver *drv) 1680{ 1681 return 1; 1682} 1683 1684static char *media_string(ide_drive_t *drive) 1685{ 1686 switch (drive->media) { 1687 case ide_disk: 1688 return "disk"; 1689 case ide_cdrom: 1690 return "cdrom"; 1691 case ide_tape: 1692 return "tape"; 1693 case ide_floppy: 1694 return "floppy"; 1695 case ide_optical: 1696 return "optical"; 1697 default: 1698 return "UNKNOWN"; 1699 } 1700} 1701 1702static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf) 1703{ 1704 ide_drive_t *drive = to_ide_device(dev); 1705 return sprintf(buf, "%s\n", media_string(drive)); 1706} 1707 1708static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf) 1709{ 1710 ide_drive_t *drive = to_ide_device(dev); 1711 return sprintf(buf, "%s\n", drive->name); 1712} 1713 1714static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) 1715{ 1716 ide_drive_t *drive = to_ide_device(dev); 1717 return sprintf(buf, "ide:m-%s\n", media_string(drive)); 1718} 1719 1720static struct device_attribute ide_dev_attrs[] = { 1721 __ATTR_RO(media), 1722 __ATTR_RO(drivename), 1723 __ATTR_RO(modalias), 1724 __ATTR_NULL 1725}; 1726 1727static int ide_uevent(struct device *dev, char **envp, int num_envp, 1728 char *buffer, int buffer_size) 1729{ 1730 ide_drive_t *drive = to_ide_device(dev); 1731 int i = 0; 1732 int length = 0; 1733 1734 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length, 1735 "MEDIA=%s", media_string(drive)); 1736 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length, 1737 "DRIVENAME=%s", drive->name); 1738 add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length, 1739 "MODALIAS=ide:m-%s", media_string(drive)); 1740 envp[i] = NULL; 1741 return 0; 1742} 1743 1744static int generic_ide_probe(struct device *dev) 1745{ 1746 ide_drive_t *drive = to_ide_device(dev); 1747 ide_driver_t *drv = to_ide_driver(dev->driver); 1748 1749 return drv->probe ? drv->probe(drive) : -ENODEV; 1750} 1751 1752static int generic_ide_remove(struct device *dev) 1753{ 1754 ide_drive_t *drive = to_ide_device(dev); 1755 ide_driver_t *drv = to_ide_driver(dev->driver); 1756 1757 if (drv->remove) 1758 drv->remove(drive); 1759 1760 return 0; 1761} 1762 1763static void generic_ide_shutdown(struct device *dev) 1764{ 1765 ide_drive_t *drive = to_ide_device(dev); 1766 ide_driver_t *drv = to_ide_driver(dev->driver); 1767 1768 if (dev->driver && drv->shutdown) 1769 drv->shutdown(drive); 1770} 1771 1772struct bus_type ide_bus_type = { 1773 .name = "ide", 1774 .match = ide_bus_match, 1775 .uevent = ide_uevent, 1776 .probe = generic_ide_probe, 1777 .remove = generic_ide_remove, 1778 .shutdown = generic_ide_shutdown, 1779 .dev_attrs = ide_dev_attrs, 1780 .suspend = generic_ide_suspend, 1781 .resume = generic_ide_resume, 1782}; 1783 1784EXPORT_SYMBOL_GPL(ide_bus_type); 1785 1786/* 1787 * This is gets invoked once during initialization, to set *everything* up 1788 */ 1789static int __init ide_init(void) 1790{ 1791 int ret; 1792 1793 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n"); 1794 system_bus_speed = ide_system_bus_speed(); 1795 1796 ret = bus_register(&ide_bus_type); 1797 if (ret < 0) { 1798 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret); 1799 return ret; 1800 } 1801 1802 init_ide_data(); 1803 1804 proc_ide_create(); 1805 1806#ifdef CONFIG_BLK_DEV_ALI14XX 1807 if (probe_ali14xx) 1808 (void)ali14xx_init(); 1809#endif 1810#ifdef CONFIG_BLK_DEV_UMC8672 1811 if (probe_umc8672) 1812 (void)umc8672_init(); 1813#endif 1814#ifdef CONFIG_BLK_DEV_DTC2278 1815 if (probe_dtc2278) 1816 (void)dtc2278_init(); 1817#endif 1818#ifdef CONFIG_BLK_DEV_HT6560B 1819 if (probe_ht6560b) 1820 (void)ht6560b_init(); 1821#endif 1822#ifdef CONFIG_BLK_DEV_QD65XX 1823 if (probe_qd65xx) 1824 (void)qd65xx_init(); 1825#endif 1826 1827 /* Probe for special PCI and other "known" interface chipsets. */ 1828 probe_for_hwifs(); 1829 1830 return 0; 1831} 1832 1833#ifdef MODULE 1834static char *options = NULL; 1835module_param(options, charp, 0); 1836MODULE_LICENSE("GPL"); 1837 1838static void __init parse_options (char *line) 1839{ 1840 char *next = line; 1841 1842 if (line == NULL || !*line) 1843 return; 1844 while ((line = next) != NULL) { 1845 if ((next = strchr(line,' ')) != NULL) 1846 *next++ = 0; 1847 if (!ide_setup(line)) 1848 printk (KERN_INFO "Unknown option '%s'\n", line); 1849 } 1850} 1851 1852int __init init_module (void) 1853{ 1854 parse_options(options); 1855 return ide_init(); 1856} 1857 1858void __exit cleanup_module (void) 1859{ 1860 int index; 1861 1862 for (index = 0; index < MAX_HWIFS; ++index) 1863 ide_unregister(index); 1864 1865#ifdef CONFIG_BLK_DEV_IDEPNP 1866 pnpide_exit(); 1867#endif 1868 1869 proc_ide_destroy(); 1870 1871 bus_unregister(&ide_bus_type); 1872} 1873 1874#else /* !MODULE */ 1875 1876__setup("", ide_setup); 1877 1878module_init(ide_init); 1879 1880#endif /* MODULE */ 1881