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