ide.c revision a594eeb1a1d320981fccc29584b6f21fcebd765f
1/* 2 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below) 3 * Copyrifht (C) 2003-2005, 2007 Bartlomiej Zolnierkiewicz 4 */ 5 6/* 7 * Mostly written by Mark Lord <mlord@pobox.com> 8 * and Gadi Oxman <gadio@netvision.net.il> 9 * and Andre Hedrick <andre@linux-ide.org> 10 * 11 * See linux/MAINTAINERS for address of current maintainer. 12 * 13 * This is the multiple IDE interface driver, as evolved from hd.c. 14 * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs 15 * (usually 14 & 15). 16 * There can be up to two drives per interface, as per the ATA-2 spec. 17 * 18 * ... 19 * 20 * From hd.c: 21 * | 22 * | It traverses the request-list, using interrupts to jump between functions. 23 * | As nearly all functions can be called within interrupts, we may not sleep. 24 * | Special care is recommended. Have Fun! 25 * | 26 * | modified by Drew Eckhardt to check nr of hd's from the CMOS. 27 * | 28 * | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug 29 * | in the early extended-partition checks and added DM partitions. 30 * | 31 * | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI). 32 * | 33 * | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads", 34 * | and general streamlining by Mark Lord (mlord@pobox.com). 35 * 36 * October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by: 37 * 38 * Mark Lord (mlord@pobox.com) (IDE Perf.Pkg) 39 * Delman Lee (delman@ieee.org) ("Mr. atdisk2") 40 * Scott Snyder (snyder@fnald0.fnal.gov) (ATAPI IDE cd-rom) 41 * 42 * This was a rewrite of just about everything from hd.c, though some original 43 * code is still sprinkled about. Think of it as a major evolution, with 44 * inspiration from lots of linux users, esp. hamish@zot.apana.org.au 45 */ 46 47#define _IDE_C /* Tell ide.h it's really us */ 48 49#include <linux/module.h> 50#include <linux/types.h> 51#include <linux/string.h> 52#include <linux/kernel.h> 53#include <linux/timer.h> 54#include <linux/mm.h> 55#include <linux/interrupt.h> 56#include <linux/major.h> 57#include <linux/errno.h> 58#include <linux/genhd.h> 59#include <linux/blkpg.h> 60#include <linux/slab.h> 61#include <linux/init.h> 62#include <linux/pci.h> 63#include <linux/delay.h> 64#include <linux/ide.h> 65#include <linux/completion.h> 66#include <linux/reboot.h> 67#include <linux/cdrom.h> 68#include <linux/seq_file.h> 69#include <linux/device.h> 70#include <linux/bitops.h> 71 72#include <asm/byteorder.h> 73#include <asm/irq.h> 74#include <asm/uaccess.h> 75#include <asm/io.h> 76 77 78/* default maximum number of failures */ 79#define IDE_DEFAULT_MAX_FAILURES 1 80 81static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR, 82 IDE2_MAJOR, IDE3_MAJOR, 83 IDE4_MAJOR, IDE5_MAJOR, 84 IDE6_MAJOR, IDE7_MAJOR, 85 IDE8_MAJOR, IDE9_MAJOR }; 86 87static int idebus_parameter; /* holds the "idebus=" parameter */ 88static int system_bus_speed; /* holds what we think is VESA/PCI bus speed */ 89 90DEFINE_MUTEX(ide_cfg_mtx); 91 __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock); 92 93int noautodma = 0; 94 95#ifdef CONFIG_BLK_DEV_IDEACPI 96int ide_noacpi = 0; 97int ide_noacpitfs = 1; 98int ide_noacpionboot = 1; 99#endif 100 101/* 102 * This is declared extern in ide.h, for access by other IDE modules: 103 */ 104ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */ 105 106EXPORT_SYMBOL(ide_hwifs); 107 108/* 109 * Do not even *think* about calling this! 110 */ 111void ide_init_port_data(ide_hwif_t *hwif, unsigned int index) 112{ 113 unsigned int unit; 114 115 /* bulk initialize hwif & drive info with zeros */ 116 memset(hwif, 0, sizeof(ide_hwif_t)); 117 118 /* fill in any non-zero initial values */ 119 hwif->index = index; 120 hwif->major = ide_hwif_to_major[index]; 121 122 hwif->name[0] = 'i'; 123 hwif->name[1] = 'd'; 124 hwif->name[2] = 'e'; 125 hwif->name[3] = '0' + index; 126 127 hwif->bus_state = BUSSTATE_ON; 128 129 init_completion(&hwif->gendev_rel_comp); 130 131 default_hwif_iops(hwif); 132 default_hwif_transport(hwif); 133 for (unit = 0; unit < MAX_DRIVES; ++unit) { 134 ide_drive_t *drive = &hwif->drives[unit]; 135 136 drive->media = ide_disk; 137 drive->select.all = (unit<<4)|0xa0; 138 drive->hwif = hwif; 139 drive->ctl = 0x08; 140 drive->ready_stat = READY_STAT; 141 drive->bad_wstat = BAD_W_STAT; 142 drive->special.b.recalibrate = 1; 143 drive->special.b.set_geometry = 1; 144 drive->name[0] = 'h'; 145 drive->name[1] = 'd'; 146 drive->name[2] = 'a' + (index * MAX_DRIVES) + unit; 147 drive->max_failures = IDE_DEFAULT_MAX_FAILURES; 148 drive->using_dma = 0; 149 drive->vdma = 0; 150 INIT_LIST_HEAD(&drive->list); 151 init_completion(&drive->gendev_rel_comp); 152 } 153} 154EXPORT_SYMBOL_GPL(ide_init_port_data); 155 156static void init_hwif_default(ide_hwif_t *hwif, unsigned int index) 157{ 158 hw_regs_t hw; 159 160 memset(&hw, 0, sizeof(hw_regs_t)); 161 162 ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq); 163 164 memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports)); 165 166 hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET]; 167#ifdef CONFIG_BLK_DEV_HD 168 if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA) 169 hwif->noprobe = 1; /* may be overridden by ide_setup() */ 170#endif 171} 172 173/* 174 * init_ide_data() sets reasonable default values into all fields 175 * of all instances of the hwifs and drives, but only on the first call. 176 * Subsequent calls have no effect (they don't wipe out anything). 177 * 178 * This routine is normally called at driver initialization time, 179 * but may also be called MUCH earlier during kernel "command-line" 180 * parameter processing. As such, we cannot depend on any other parts 181 * of the kernel (such as memory allocation) to be functioning yet. 182 * 183 * This is too bad, as otherwise we could dynamically allocate the 184 * ide_drive_t structs as needed, rather than always consuming memory 185 * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them. 186 * 187 * FIXME: We should stuff the setup data into __init and copy the 188 * relevant hwifs/allocate them properly during boot. 189 */ 190#define MAGIC_COOKIE 0x12345678 191static void __init init_ide_data (void) 192{ 193 ide_hwif_t *hwif; 194 unsigned int index; 195 static unsigned long magic_cookie = MAGIC_COOKIE; 196 197 if (magic_cookie != MAGIC_COOKIE) 198 return; /* already initialized */ 199 magic_cookie = 0; 200 201 /* Initialise all interface structures */ 202 for (index = 0; index < MAX_HWIFS; ++index) { 203 hwif = &ide_hwifs[index]; 204 ide_init_port_data(hwif, index); 205 init_hwif_default(hwif, index); 206#if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI) 207 hwif->irq = 208 ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]); 209#endif 210 } 211} 212 213/** 214 * ide_system_bus_speed - guess bus speed 215 * 216 * ide_system_bus_speed() returns what we think is the system VESA/PCI 217 * bus speed (in MHz). This is used for calculating interface PIO timings. 218 * The default is 40 for known PCI systems, 50 otherwise. 219 * The "idebus=xx" parameter can be used to override this value. 220 * The actual value to be used is computed/displayed the first time 221 * through. Drivers should only use this as a last resort. 222 * 223 * Returns a guessed speed in MHz. 224 */ 225 226static int ide_system_bus_speed(void) 227{ 228#ifdef CONFIG_PCI 229 static struct pci_device_id pci_default[] = { 230 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) }, 231 { } 232 }; 233#else 234#define pci_default 0 235#endif /* CONFIG_PCI */ 236 237 /* user supplied value */ 238 if (idebus_parameter) 239 return idebus_parameter; 240 241 /* safe default value for PCI or VESA and PCI*/ 242 return pci_dev_present(pci_default) ? 33 : 50; 243} 244 245ide_hwif_t * ide_find_port(unsigned long base) 246{ 247 ide_hwif_t *hwif; 248 int i; 249 250 for (i = 0; i < MAX_HWIFS; i++) { 251 hwif = &ide_hwifs[i]; 252 if (hwif->io_ports[IDE_DATA_OFFSET] == base) 253 goto found; 254 } 255 256 for (i = 0; i < MAX_HWIFS; i++) { 257 hwif = &ide_hwifs[i]; 258 if (hwif->io_ports[IDE_DATA_OFFSET] == 0) 259 goto found; 260 } 261 262 hwif = NULL; 263found: 264 return hwif; 265} 266 267EXPORT_SYMBOL_GPL(ide_find_port); 268 269static struct resource* hwif_request_region(ide_hwif_t *hwif, 270 unsigned long addr, int num) 271{ 272 struct resource *res = request_region(addr, num, hwif->name); 273 274 if (!res) 275 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n", 276 hwif->name, addr, addr+num-1); 277 return res; 278} 279 280/** 281 * ide_hwif_request_regions - request resources for IDE 282 * @hwif: interface to use 283 * 284 * Requests all the needed resources for an interface. 285 * Right now core IDE code does this work which is deeply wrong. 286 * MMIO leaves it to the controller driver, 287 * PIO will migrate this way over time. 288 */ 289 290int ide_hwif_request_regions(ide_hwif_t *hwif) 291{ 292 unsigned long addr; 293 unsigned int i; 294 295 if (hwif->mmio) 296 return 0; 297 addr = hwif->io_ports[IDE_CONTROL_OFFSET]; 298 if (addr && !hwif_request_region(hwif, addr, 1)) 299 goto control_region_busy; 300 hwif->straight8 = 0; 301 addr = hwif->io_ports[IDE_DATA_OFFSET]; 302 if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) { 303 if (!hwif_request_region(hwif, addr, 8)) 304 goto data_region_busy; 305 hwif->straight8 = 1; 306 return 0; 307 } 308 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) { 309 addr = hwif->io_ports[i]; 310 if (!hwif_request_region(hwif, addr, 1)) { 311 while (--i) 312 release_region(addr, 1); 313 goto data_region_busy; 314 } 315 } 316 return 0; 317 318data_region_busy: 319 addr = hwif->io_ports[IDE_CONTROL_OFFSET]; 320 if (addr) 321 release_region(addr, 1); 322control_region_busy: 323 /* If any errors are return, we drop the hwif interface. */ 324 return -EBUSY; 325} 326 327/** 328 * ide_hwif_release_regions - free IDE resources 329 * 330 * Note that we only release the standard ports, 331 * and do not even try to handle any extra ports 332 * allocated for weird IDE interface chipsets. 333 * 334 * Note also that we don't yet handle mmio resources here. More 335 * importantly our caller should be doing this so we need to 336 * restructure this as a helper function for drivers. 337 */ 338 339void ide_hwif_release_regions(ide_hwif_t *hwif) 340{ 341 u32 i = 0; 342 343 if (hwif->mmio) 344 return; 345 if (hwif->io_ports[IDE_CONTROL_OFFSET]) 346 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1); 347 if (hwif->straight8) { 348 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8); 349 return; 350 } 351 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) 352 if (hwif->io_ports[i]) 353 release_region(hwif->io_ports[i], 1); 354} 355 356/** 357 * ide_hwif_restore - restore hwif to template 358 * @hwif: hwif to update 359 * @tmp_hwif: template 360 * 361 * Restore hwif to a previous state by copying most settings 362 * from the template. 363 */ 364 365static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif) 366{ 367 hwif->hwgroup = tmp_hwif->hwgroup; 368 369 hwif->gendev.parent = tmp_hwif->gendev.parent; 370 371 hwif->proc = tmp_hwif->proc; 372 373 hwif->major = tmp_hwif->major; 374 hwif->straight8 = tmp_hwif->straight8; 375 hwif->bus_state = tmp_hwif->bus_state; 376 377 hwif->host_flags = tmp_hwif->host_flags; 378 379 hwif->pio_mask = tmp_hwif->pio_mask; 380 381 hwif->ultra_mask = tmp_hwif->ultra_mask; 382 hwif->mwdma_mask = tmp_hwif->mwdma_mask; 383 hwif->swdma_mask = tmp_hwif->swdma_mask; 384 385 hwif->cbl = tmp_hwif->cbl; 386 387 hwif->chipset = tmp_hwif->chipset; 388 hwif->hold = tmp_hwif->hold; 389 390 hwif->dev = tmp_hwif->dev; 391 392#ifdef CONFIG_BLK_DEV_IDEPCI 393 hwif->cds = tmp_hwif->cds; 394#endif 395 396 hwif->set_pio_mode = tmp_hwif->set_pio_mode; 397 hwif->set_dma_mode = tmp_hwif->set_dma_mode; 398 hwif->mdma_filter = tmp_hwif->mdma_filter; 399 hwif->udma_filter = tmp_hwif->udma_filter; 400 hwif->selectproc = tmp_hwif->selectproc; 401 hwif->reset_poll = tmp_hwif->reset_poll; 402 hwif->pre_reset = tmp_hwif->pre_reset; 403 hwif->resetproc = tmp_hwif->resetproc; 404 hwif->maskproc = tmp_hwif->maskproc; 405 hwif->quirkproc = tmp_hwif->quirkproc; 406 hwif->busproc = tmp_hwif->busproc; 407 408 hwif->ata_input_data = tmp_hwif->ata_input_data; 409 hwif->ata_output_data = tmp_hwif->ata_output_data; 410 hwif->atapi_input_bytes = tmp_hwif->atapi_input_bytes; 411 hwif->atapi_output_bytes = tmp_hwif->atapi_output_bytes; 412 413 hwif->dma_host_set = tmp_hwif->dma_host_set; 414 hwif->dma_setup = tmp_hwif->dma_setup; 415 hwif->dma_exec_cmd = tmp_hwif->dma_exec_cmd; 416 hwif->dma_start = tmp_hwif->dma_start; 417 hwif->ide_dma_end = tmp_hwif->ide_dma_end; 418 hwif->ide_dma_test_irq = tmp_hwif->ide_dma_test_irq; 419 hwif->ide_dma_clear_irq = tmp_hwif->ide_dma_clear_irq; 420 hwif->dma_lost_irq = tmp_hwif->dma_lost_irq; 421 hwif->dma_timeout = tmp_hwif->dma_timeout; 422 423 hwif->OUTB = tmp_hwif->OUTB; 424 hwif->OUTBSYNC = tmp_hwif->OUTBSYNC; 425 hwif->OUTW = tmp_hwif->OUTW; 426 hwif->OUTSW = tmp_hwif->OUTSW; 427 hwif->OUTSL = tmp_hwif->OUTSL; 428 429 hwif->INB = tmp_hwif->INB; 430 hwif->INW = tmp_hwif->INW; 431 hwif->INSW = tmp_hwif->INSW; 432 hwif->INSL = tmp_hwif->INSL; 433 434 hwif->sg_max_nents = tmp_hwif->sg_max_nents; 435 436 hwif->mmio = tmp_hwif->mmio; 437 hwif->rqsize = tmp_hwif->rqsize; 438 439#ifndef CONFIG_BLK_DEV_IDECS 440 hwif->irq = tmp_hwif->irq; 441#endif 442 443 hwif->dma_base = tmp_hwif->dma_base; 444 hwif->dma_command = tmp_hwif->dma_command; 445 hwif->dma_vendor1 = tmp_hwif->dma_vendor1; 446 hwif->dma_status = tmp_hwif->dma_status; 447 hwif->dma_vendor3 = tmp_hwif->dma_vendor3; 448 hwif->dma_prdtable = tmp_hwif->dma_prdtable; 449 450 hwif->config_data = tmp_hwif->config_data; 451 hwif->select_data = tmp_hwif->select_data; 452 hwif->extra_base = tmp_hwif->extra_base; 453 hwif->extra_ports = tmp_hwif->extra_ports; 454 455 hwif->hwif_data = tmp_hwif->hwif_data; 456} 457 458void ide_remove_port_from_hwgroup(ide_hwif_t *hwif) 459{ 460 ide_hwgroup_t *hwgroup = hwif->hwgroup; 461 462 spin_lock_irq(&ide_lock); 463 /* 464 * Remove us from the hwgroup, and free 465 * the hwgroup if we were the only member 466 */ 467 if (hwif->next == hwif) { 468 BUG_ON(hwgroup->hwif != hwif); 469 kfree(hwgroup); 470 } else { 471 /* There is another interface in hwgroup. 472 * Unlink us, and set hwgroup->drive and ->hwif to 473 * something sane. 474 */ 475 ide_hwif_t *g = hwgroup->hwif; 476 477 while (g->next != hwif) 478 g = g->next; 479 g->next = hwif->next; 480 if (hwgroup->hwif == hwif) { 481 /* Chose a random hwif for hwgroup->hwif. 482 * It's guaranteed that there are no drives 483 * left in the hwgroup. 484 */ 485 BUG_ON(hwgroup->drive != NULL); 486 hwgroup->hwif = g; 487 } 488 BUG_ON(hwgroup->hwif == hwif); 489 } 490 spin_unlock_irq(&ide_lock); 491} 492 493/** 494 * ide_unregister - free an IDE interface 495 * @index: index of interface (will change soon to a pointer) 496 * @init_default: init default hwif flag 497 * @restore: restore hwif flag 498 * 499 * Perform the final unregister of an IDE interface. At the moment 500 * we don't refcount interfaces so this will also get split up. 501 * 502 * Locking: 503 * The caller must not hold the IDE locks 504 * The drive present/vanishing is not yet properly locked 505 * Take care with the callbacks. These have been split to avoid 506 * deadlocking the IDE layer. The shutdown callback is called 507 * before we take the lock and free resources. It is up to the 508 * caller to be sure there is no pending I/O here, and that 509 * the interface will not be reopened (present/vanishing locking 510 * isn't yet done BTW). After we commit to the final kill we 511 * call the cleanup callback with the ide locks held. 512 * 513 * Unregister restores the hwif structures to the default state. 514 * This is raving bonkers. 515 */ 516 517void ide_unregister(unsigned int index, int init_default, int restore) 518{ 519 ide_drive_t *drive; 520 ide_hwif_t *hwif, *g; 521 static ide_hwif_t tmp_hwif; /* protected by ide_cfg_mtx */ 522 ide_hwgroup_t *hwgroup; 523 int irq_count = 0, unit; 524 525 BUG_ON(index >= MAX_HWIFS); 526 527 BUG_ON(in_interrupt()); 528 BUG_ON(irqs_disabled()); 529 mutex_lock(&ide_cfg_mtx); 530 spin_lock_irq(&ide_lock); 531 hwif = &ide_hwifs[index]; 532 if (!hwif->present) 533 goto abort; 534 for (unit = 0; unit < MAX_DRIVES; ++unit) { 535 drive = &hwif->drives[unit]; 536 if (!drive->present) 537 continue; 538 spin_unlock_irq(&ide_lock); 539 device_unregister(&drive->gendev); 540 wait_for_completion(&drive->gendev_rel_comp); 541 spin_lock_irq(&ide_lock); 542 } 543 hwif->present = 0; 544 545 spin_unlock_irq(&ide_lock); 546 547 ide_proc_unregister_port(hwif); 548 549 hwgroup = hwif->hwgroup; 550 /* 551 * free the irq if we were the only hwif using it 552 */ 553 g = hwgroup->hwif; 554 do { 555 if (g->irq == hwif->irq) 556 ++irq_count; 557 g = g->next; 558 } while (g != hwgroup->hwif); 559 if (irq_count == 1) 560 free_irq(hwif->irq, hwgroup); 561 562 ide_remove_port_from_hwgroup(hwif); 563 564 device_unregister(&hwif->gendev); 565 wait_for_completion(&hwif->gendev_rel_comp); 566 567 /* 568 * Remove us from the kernel's knowledge 569 */ 570 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS); 571 kfree(hwif->sg_table); 572 unregister_blkdev(hwif->major, hwif->name); 573 spin_lock_irq(&ide_lock); 574 575 if (hwif->dma_base) { 576 (void) ide_release_dma(hwif); 577 578 hwif->dma_base = 0; 579 hwif->dma_command = 0; 580 hwif->dma_vendor1 = 0; 581 hwif->dma_status = 0; 582 hwif->dma_vendor3 = 0; 583 hwif->dma_prdtable = 0; 584 585 hwif->extra_base = 0; 586 hwif->extra_ports = 0; 587 } 588 589 ide_hwif_release_regions(hwif); 590 591 /* copy original settings */ 592 tmp_hwif = *hwif; 593 594 /* restore hwif data to pristine status */ 595 ide_init_port_data(hwif, index); 596 597 if (init_default) 598 init_hwif_default(hwif, index); 599 600 if (restore) 601 ide_hwif_restore(hwif, &tmp_hwif); 602 603abort: 604 spin_unlock_irq(&ide_lock); 605 mutex_unlock(&ide_cfg_mtx); 606} 607 608EXPORT_SYMBOL(ide_unregister); 609 610void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw) 611{ 612 memcpy(hwif->io_ports, hw->io_ports, sizeof(hwif->io_ports)); 613 hwif->irq = hw->irq; 614 hwif->noprobe = 0; 615 hwif->chipset = hw->chipset; 616 hwif->gendev.parent = hw->dev; 617 hwif->ack_intr = hw->ack_intr; 618} 619EXPORT_SYMBOL_GPL(ide_init_port_hw); 620 621ide_hwif_t *ide_deprecated_find_port(unsigned long base) 622{ 623 ide_hwif_t *hwif; 624 int i; 625 626 for (i = 0; i < MAX_HWIFS; i++) { 627 hwif = &ide_hwifs[i]; 628 if (hwif->io_ports[IDE_DATA_OFFSET] == base) 629 goto found; 630 } 631 632 for (i = 0; i < MAX_HWIFS; i++) { 633 hwif = &ide_hwifs[i]; 634 if (hwif->hold) 635 continue; 636 if (!hwif->present && hwif->mate == NULL) 637 goto found; 638 } 639 640 hwif = NULL; 641found: 642 return hwif; 643} 644EXPORT_SYMBOL_GPL(ide_deprecated_find_port); 645 646/** 647 * ide_register_hw - register IDE interface 648 * @hw: hardware registers 649 * @quirkproc: quirkproc function 650 * @hwifp: pointer to returned hwif 651 * 652 * Register an IDE interface, specifying exactly the registers etc. 653 * 654 * Returns -1 on error. 655 */ 656 657int ide_register_hw(hw_regs_t *hw, void (*quirkproc)(ide_drive_t *), 658 ide_hwif_t **hwifp) 659{ 660 int index, retry = 1; 661 ide_hwif_t *hwif; 662 u8 idx[4] = { 0xff, 0xff, 0xff, 0xff }; 663 664 do { 665 hwif = ide_deprecated_find_port(hw->io_ports[IDE_DATA_OFFSET]); 666 if (hwif) 667 goto found; 668 for (index = 0; index < MAX_HWIFS; index++) 669 ide_unregister(index, 1, 1); 670 } while (retry--); 671 return -1; 672found: 673 index = hwif->index; 674 if (hwif->present) 675 ide_unregister(index, 0, 1); 676 else if (!hwif->hold) 677 ide_init_port_data(hwif, index); 678 679 ide_init_port_hw(hwif, hw); 680 hwif->quirkproc = quirkproc; 681 682 idx[0] = index; 683 684 ide_device_add(idx, NULL); 685 686 if (hwifp) 687 *hwifp = hwif; 688 689 return hwif->present ? index : -1; 690} 691 692EXPORT_SYMBOL(ide_register_hw); 693 694/* 695 * Locks for IDE setting functionality 696 */ 697 698DEFINE_MUTEX(ide_setting_mtx); 699 700EXPORT_SYMBOL_GPL(ide_setting_mtx); 701 702/** 703 * ide_spin_wait_hwgroup - wait for group 704 * @drive: drive in the group 705 * 706 * Wait for an IDE device group to go non busy and then return 707 * holding the ide_lock which guards the hwgroup->busy status 708 * and right to use it. 709 */ 710 711int ide_spin_wait_hwgroup (ide_drive_t *drive) 712{ 713 ide_hwgroup_t *hwgroup = HWGROUP(drive); 714 unsigned long timeout = jiffies + (3 * HZ); 715 716 spin_lock_irq(&ide_lock); 717 718 while (hwgroup->busy) { 719 unsigned long lflags; 720 spin_unlock_irq(&ide_lock); 721 local_irq_set(lflags); 722 if (time_after(jiffies, timeout)) { 723 local_irq_restore(lflags); 724 printk(KERN_ERR "%s: channel busy\n", drive->name); 725 return -EBUSY; 726 } 727 local_irq_restore(lflags); 728 spin_lock_irq(&ide_lock); 729 } 730 return 0; 731} 732 733EXPORT_SYMBOL(ide_spin_wait_hwgroup); 734 735int set_io_32bit(ide_drive_t *drive, int arg) 736{ 737 if (drive->no_io_32bit) 738 return -EPERM; 739 740 if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1)) 741 return -EINVAL; 742 743 if (ide_spin_wait_hwgroup(drive)) 744 return -EBUSY; 745 746 drive->io_32bit = arg; 747 748 spin_unlock_irq(&ide_lock); 749 750 return 0; 751} 752 753static int set_ksettings(ide_drive_t *drive, int arg) 754{ 755 if (arg < 0 || arg > 1) 756 return -EINVAL; 757 758 if (ide_spin_wait_hwgroup(drive)) 759 return -EBUSY; 760 drive->keep_settings = arg; 761 spin_unlock_irq(&ide_lock); 762 763 return 0; 764} 765 766int set_using_dma(ide_drive_t *drive, int arg) 767{ 768#ifdef CONFIG_BLK_DEV_IDEDMA 769 ide_hwif_t *hwif = drive->hwif; 770 int err = -EPERM; 771 772 if (arg < 0 || arg > 1) 773 return -EINVAL; 774 775 if (!drive->id || !(drive->id->capability & 1)) 776 goto out; 777 778 if (hwif->dma_host_set == NULL) 779 goto out; 780 781 err = -EBUSY; 782 if (ide_spin_wait_hwgroup(drive)) 783 goto out; 784 /* 785 * set ->busy flag, unlock and let it ride 786 */ 787 hwif->hwgroup->busy = 1; 788 spin_unlock_irq(&ide_lock); 789 790 err = 0; 791 792 if (arg) { 793 if (ide_set_dma(drive)) 794 err = -EIO; 795 } else 796 ide_dma_off(drive); 797 798 /* 799 * lock, clear ->busy flag and unlock before leaving 800 */ 801 spin_lock_irq(&ide_lock); 802 hwif->hwgroup->busy = 0; 803 spin_unlock_irq(&ide_lock); 804out: 805 return err; 806#else 807 if (arg < 0 || arg > 1) 808 return -EINVAL; 809 810 return -EPERM; 811#endif 812} 813 814int set_pio_mode(ide_drive_t *drive, int arg) 815{ 816 struct request rq; 817 818 if (arg < 0 || arg > 255) 819 return -EINVAL; 820 821 if (drive->hwif->set_pio_mode == NULL) 822 return -ENOSYS; 823 824 if (drive->special.b.set_tune) 825 return -EBUSY; 826 827 ide_init_drive_cmd(&rq); 828 rq.cmd_type = REQ_TYPE_ATA_TASKFILE; 829 830 drive->tune_req = (u8) arg; 831 drive->special.b.set_tune = 1; 832 (void) ide_do_drive_cmd(drive, &rq, ide_wait); 833 return 0; 834} 835 836static int set_unmaskirq(ide_drive_t *drive, int arg) 837{ 838 if (drive->no_unmask) 839 return -EPERM; 840 841 if (arg < 0 || arg > 1) 842 return -EINVAL; 843 844 if (ide_spin_wait_hwgroup(drive)) 845 return -EBUSY; 846 drive->unmask = arg; 847 spin_unlock_irq(&ide_lock); 848 849 return 0; 850} 851 852/** 853 * system_bus_clock - clock guess 854 * 855 * External version of the bus clock guess used by very old IDE drivers 856 * for things like VLB timings. Should not be used. 857 */ 858 859int system_bus_clock (void) 860{ 861 return system_bus_speed; 862} 863 864EXPORT_SYMBOL(system_bus_clock); 865 866static int generic_ide_suspend(struct device *dev, pm_message_t mesg) 867{ 868 ide_drive_t *drive = dev->driver_data; 869 ide_hwif_t *hwif = HWIF(drive); 870 struct request rq; 871 struct request_pm_state rqpm; 872 ide_task_t args; 873 int ret; 874 875 /* Call ACPI _GTM only once */ 876 if (!(drive->dn % 2)) 877 ide_acpi_get_timing(hwif); 878 879 memset(&rq, 0, sizeof(rq)); 880 memset(&rqpm, 0, sizeof(rqpm)); 881 memset(&args, 0, sizeof(args)); 882 rq.cmd_type = REQ_TYPE_PM_SUSPEND; 883 rq.special = &args; 884 rq.data = &rqpm; 885 rqpm.pm_step = ide_pm_state_start_suspend; 886 if (mesg.event == PM_EVENT_PRETHAW) 887 mesg.event = PM_EVENT_FREEZE; 888 rqpm.pm_state = mesg.event; 889 890 ret = ide_do_drive_cmd(drive, &rq, ide_wait); 891 /* only call ACPI _PS3 after both drivers are suspended */ 892 if (!ret && (((drive->dn % 2) && hwif->drives[0].present 893 && hwif->drives[1].present) 894 || !hwif->drives[0].present 895 || !hwif->drives[1].present)) 896 ide_acpi_set_state(hwif, 0); 897 return ret; 898} 899 900static int generic_ide_resume(struct device *dev) 901{ 902 ide_drive_t *drive = dev->driver_data; 903 ide_hwif_t *hwif = HWIF(drive); 904 struct request rq; 905 struct request_pm_state rqpm; 906 ide_task_t args; 907 int err; 908 909 /* Call ACPI _STM only once */ 910 if (!(drive->dn % 2)) { 911 ide_acpi_set_state(hwif, 1); 912 ide_acpi_push_timing(hwif); 913 } 914 915 ide_acpi_exec_tfs(drive); 916 917 memset(&rq, 0, sizeof(rq)); 918 memset(&rqpm, 0, sizeof(rqpm)); 919 memset(&args, 0, sizeof(args)); 920 rq.cmd_type = REQ_TYPE_PM_RESUME; 921 rq.special = &args; 922 rq.data = &rqpm; 923 rqpm.pm_step = ide_pm_state_start_resume; 924 rqpm.pm_state = PM_EVENT_ON; 925 926 err = ide_do_drive_cmd(drive, &rq, ide_head_wait); 927 928 if (err == 0 && dev->driver) { 929 ide_driver_t *drv = to_ide_driver(dev->driver); 930 931 if (drv->resume) 932 drv->resume(drive); 933 } 934 935 return err; 936} 937 938int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev, 939 unsigned int cmd, unsigned long arg) 940{ 941 unsigned long flags; 942 ide_driver_t *drv; 943 void __user *p = (void __user *)arg; 944 int err = 0, (*setfunc)(ide_drive_t *, int); 945 u8 *val; 946 947 switch (cmd) { 948 case HDIO_GET_32BIT: val = &drive->io_32bit; goto read_val; 949 case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val; 950 case HDIO_GET_UNMASKINTR: val = &drive->unmask; goto read_val; 951 case HDIO_GET_DMA: val = &drive->using_dma; goto read_val; 952 case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val; 953 case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val; 954 case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val; 955 case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val; 956 case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val; 957 } 958 959 switch (cmd) { 960 case HDIO_OBSOLETE_IDENTITY: 961 case HDIO_GET_IDENTITY: 962 if (bdev != bdev->bd_contains) 963 return -EINVAL; 964 if (drive->id_read == 0) 965 return -ENOMSG; 966 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142)) 967 return -EFAULT; 968 return 0; 969 970 case HDIO_GET_NICE: 971 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP | 972 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP | 973 drive->nice1 << IDE_NICE_1, 974 (long __user *) arg); 975#ifdef CONFIG_IDE_TASK_IOCTL 976 case HDIO_DRIVE_TASKFILE: 977 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 978 return -EACCES; 979 switch(drive->media) { 980 case ide_disk: 981 return ide_taskfile_ioctl(drive, cmd, arg); 982 default: 983 return -ENOMSG; 984 } 985#endif /* CONFIG_IDE_TASK_IOCTL */ 986 987 case HDIO_DRIVE_CMD: 988 if (!capable(CAP_SYS_RAWIO)) 989 return -EACCES; 990 return ide_cmd_ioctl(drive, cmd, arg); 991 992 case HDIO_DRIVE_TASK: 993 if (!capable(CAP_SYS_RAWIO)) 994 return -EACCES; 995 return ide_task_ioctl(drive, cmd, arg); 996 997 case HDIO_SCAN_HWIF: 998 { 999 hw_regs_t hw; 1000 int args[3]; 1001 if (!capable(CAP_SYS_RAWIO)) return -EACCES; 1002 if (copy_from_user(args, p, 3 * sizeof(int))) 1003 return -EFAULT; 1004 memset(&hw, 0, sizeof(hw)); 1005 ide_init_hwif_ports(&hw, (unsigned long) args[0], 1006 (unsigned long) args[1], NULL); 1007 hw.irq = args[2]; 1008 if (ide_register_hw(&hw, NULL, NULL) == -1) 1009 return -EIO; 1010 return 0; 1011 } 1012 case HDIO_UNREGISTER_HWIF: 1013 if (!capable(CAP_SYS_RAWIO)) return -EACCES; 1014 /* (arg > MAX_HWIFS) checked in function */ 1015 ide_unregister(arg, 1, 1); 1016 return 0; 1017 case HDIO_SET_NICE: 1018 if (!capable(CAP_SYS_ADMIN)) return -EACCES; 1019 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1)))) 1020 return -EPERM; 1021 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1; 1022 drv = *(ide_driver_t **)bdev->bd_disk->private_data; 1023 if (drive->dsc_overlap && !drv->supports_dsc_overlap) { 1024 drive->dsc_overlap = 0; 1025 return -EPERM; 1026 } 1027 drive->nice1 = (arg >> IDE_NICE_1) & 1; 1028 return 0; 1029 case HDIO_DRIVE_RESET: 1030 if (!capable(CAP_SYS_ADMIN)) 1031 return -EACCES; 1032 1033 /* 1034 * Abort the current command on the 1035 * group if there is one, taking 1036 * care not to allow anything else 1037 * to be queued and to die on the 1038 * spot if we miss one somehow 1039 */ 1040 1041 spin_lock_irqsave(&ide_lock, flags); 1042 1043 if (HWGROUP(drive)->resetting) { 1044 spin_unlock_irqrestore(&ide_lock, flags); 1045 return -EBUSY; 1046 } 1047 1048 ide_abort(drive, "drive reset"); 1049 1050 BUG_ON(HWGROUP(drive)->handler); 1051 1052 /* Ensure nothing gets queued after we 1053 drop the lock. Reset will clear the busy */ 1054 1055 HWGROUP(drive)->busy = 1; 1056 spin_unlock_irqrestore(&ide_lock, flags); 1057 (void) ide_do_reset(drive); 1058 1059 return 0; 1060 case HDIO_GET_BUSSTATE: 1061 if (!capable(CAP_SYS_ADMIN)) 1062 return -EACCES; 1063 if (put_user(HWIF(drive)->bus_state, (long __user *)arg)) 1064 return -EFAULT; 1065 return 0; 1066 1067 case HDIO_SET_BUSSTATE: 1068 if (!capable(CAP_SYS_ADMIN)) 1069 return -EACCES; 1070 if (HWIF(drive)->busproc) 1071 return HWIF(drive)->busproc(drive, (int)arg); 1072 return -EOPNOTSUPP; 1073 default: 1074 return -EINVAL; 1075 } 1076 1077read_val: 1078 mutex_lock(&ide_setting_mtx); 1079 spin_lock_irqsave(&ide_lock, flags); 1080 err = *val; 1081 spin_unlock_irqrestore(&ide_lock, flags); 1082 mutex_unlock(&ide_setting_mtx); 1083 return err >= 0 ? put_user(err, (long __user *)arg) : err; 1084 1085set_val: 1086 if (bdev != bdev->bd_contains) 1087 err = -EINVAL; 1088 else { 1089 if (!capable(CAP_SYS_ADMIN)) 1090 err = -EACCES; 1091 else { 1092 mutex_lock(&ide_setting_mtx); 1093 err = setfunc(drive, arg); 1094 mutex_unlock(&ide_setting_mtx); 1095 } 1096 } 1097 return err; 1098} 1099 1100EXPORT_SYMBOL(generic_ide_ioctl); 1101 1102/* 1103 * stridx() returns the offset of c within s, 1104 * or -1 if c is '\0' or not found within s. 1105 */ 1106static int __init stridx (const char *s, char c) 1107{ 1108 char *i = strchr(s, c); 1109 return (i && c) ? i - s : -1; 1110} 1111 1112/* 1113 * match_parm() does parsing for ide_setup(): 1114 * 1115 * 1. the first char of s must be '='. 1116 * 2. if the remainder matches one of the supplied keywords, 1117 * the index (1 based) of the keyword is negated and returned. 1118 * 3. if the remainder is a series of no more than max_vals numbers 1119 * separated by commas, the numbers are saved in vals[] and a 1120 * count of how many were saved is returned. Base10 is assumed, 1121 * and base16 is allowed when prefixed with "0x". 1122 * 4. otherwise, zero is returned. 1123 */ 1124static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals) 1125{ 1126 static const char *decimal = "0123456789"; 1127 static const char *hex = "0123456789abcdef"; 1128 int i, n; 1129 1130 if (*s++ == '=') { 1131 /* 1132 * Try matching against the supplied keywords, 1133 * and return -(index+1) if we match one 1134 */ 1135 if (keywords != NULL) { 1136 for (i = 0; *keywords != NULL; ++i) { 1137 if (!strcmp(s, *keywords++)) 1138 return -(i+1); 1139 } 1140 } 1141 /* 1142 * Look for a series of no more than "max_vals" 1143 * numeric values separated by commas, in base10, 1144 * or base16 when prefixed with "0x". 1145 * Return a count of how many were found. 1146 */ 1147 for (n = 0; (i = stridx(decimal, *s)) >= 0;) { 1148 vals[n] = i; 1149 while ((i = stridx(decimal, *++s)) >= 0) 1150 vals[n] = (vals[n] * 10) + i; 1151 if (*s == 'x' && !vals[n]) { 1152 while ((i = stridx(hex, *++s)) >= 0) 1153 vals[n] = (vals[n] * 0x10) + i; 1154 } 1155 if (++n == max_vals) 1156 break; 1157 if (*s == ',' || *s == ';') 1158 ++s; 1159 } 1160 if (!*s) 1161 return n; 1162 } 1163 return 0; /* zero = nothing matched */ 1164} 1165 1166extern int probe_ali14xx; 1167extern int probe_umc8672; 1168extern int probe_dtc2278; 1169extern int probe_ht6560b; 1170extern int probe_qd65xx; 1171extern int cmd640_vlb; 1172 1173static int __initdata is_chipset_set[MAX_HWIFS]; 1174 1175/* 1176 * ide_setup() gets called VERY EARLY during initialization, 1177 * to handle kernel "command line" strings beginning with "hdx=" or "ide". 1178 * 1179 * Remember to update Documentation/ide/ide.txt if you change something here. 1180 */ 1181static int __init ide_setup(char *s) 1182{ 1183 int i, vals[3]; 1184 ide_hwif_t *hwif; 1185 ide_drive_t *drive; 1186 unsigned int hw, unit; 1187 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1); 1188 const char max_hwif = '0' + (MAX_HWIFS - 1); 1189 1190 1191 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */ 1192 return 0; /* driver and not us */ 1193 1194 if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2)) 1195 return 0; 1196 1197 printk(KERN_INFO "ide_setup: %s", s); 1198 init_ide_data (); 1199 1200#ifdef CONFIG_BLK_DEV_IDEDOUBLER 1201 if (!strcmp(s, "ide=doubler")) { 1202 extern int ide_doubler; 1203 1204 printk(" : Enabled support for IDE doublers\n"); 1205 ide_doubler = 1; 1206 return 1; 1207 } 1208#endif /* CONFIG_BLK_DEV_IDEDOUBLER */ 1209 1210 if (!strcmp(s, "ide=nodma")) { 1211 printk(" : Prevented DMA\n"); 1212 noautodma = 1; 1213 goto obsolete_option; 1214 } 1215 1216#ifdef CONFIG_BLK_DEV_IDEACPI 1217 if (!strcmp(s, "ide=noacpi")) { 1218 //printk(" : Disable IDE ACPI support.\n"); 1219 ide_noacpi = 1; 1220 return 1; 1221 } 1222 if (!strcmp(s, "ide=acpigtf")) { 1223 //printk(" : Enable IDE ACPI _GTF support.\n"); 1224 ide_noacpitfs = 0; 1225 return 1; 1226 } 1227 if (!strcmp(s, "ide=acpionboot")) { 1228 //printk(" : Call IDE ACPI methods on boot.\n"); 1229 ide_noacpionboot = 0; 1230 return 1; 1231 } 1232#endif /* CONFIG_BLK_DEV_IDEACPI */ 1233 1234 /* 1235 * Look for drive options: "hdx=" 1236 */ 1237 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) { 1238 const char *hd_words[] = { 1239 "none", "noprobe", "nowerr", "cdrom", "nodma", 1240 "autotune", "noautotune", "-8", "-9", "-10", 1241 "noflush", "remap", "remap63", "scsi", NULL }; 1242 unit = s[2] - 'a'; 1243 hw = unit / MAX_DRIVES; 1244 unit = unit % MAX_DRIVES; 1245 hwif = &ide_hwifs[hw]; 1246 drive = &hwif->drives[unit]; 1247 if (strncmp(s + 4, "ide-", 4) == 0) { 1248 strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req)); 1249 goto obsolete_option; 1250 } 1251 switch (match_parm(&s[3], hd_words, vals, 3)) { 1252 case -1: /* "none" */ 1253 case -2: /* "noprobe" */ 1254 drive->noprobe = 1; 1255 goto done; 1256 case -3: /* "nowerr" */ 1257 drive->bad_wstat = BAD_R_STAT; 1258 hwif->noprobe = 0; 1259 goto done; 1260 case -4: /* "cdrom" */ 1261 drive->present = 1; 1262 drive->media = ide_cdrom; 1263 /* an ATAPI device ignores DRDY */ 1264 drive->ready_stat = 0; 1265 hwif->noprobe = 0; 1266 goto done; 1267 case -5: /* nodma */ 1268 drive->nodma = 1; 1269 goto done; 1270 case -6: /* "autotune" */ 1271 drive->autotune = IDE_TUNE_AUTO; 1272 goto obsolete_option; 1273 case -7: /* "noautotune" */ 1274 drive->autotune = IDE_TUNE_NOAUTO; 1275 goto obsolete_option; 1276 case -11: /* noflush */ 1277 drive->noflush = 1; 1278 goto done; 1279 case -12: /* "remap" */ 1280 drive->remap_0_to_1 = 1; 1281 goto obsolete_option; 1282 case -13: /* "remap63" */ 1283 drive->sect0 = 63; 1284 goto obsolete_option; 1285 case -14: /* "scsi" */ 1286 drive->scsi = 1; 1287 goto obsolete_option; 1288 case 3: /* cyl,head,sect */ 1289 drive->media = ide_disk; 1290 drive->ready_stat = READY_STAT; 1291 drive->cyl = drive->bios_cyl = vals[0]; 1292 drive->head = drive->bios_head = vals[1]; 1293 drive->sect = drive->bios_sect = vals[2]; 1294 drive->present = 1; 1295 drive->forced_geom = 1; 1296 hwif->noprobe = 0; 1297 goto done; 1298 default: 1299 goto bad_option; 1300 } 1301 } 1302 1303 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e') 1304 goto bad_option; 1305 /* 1306 * Look for bus speed option: "idebus=" 1307 */ 1308 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') { 1309 if (match_parm(&s[6], NULL, vals, 1) != 1) 1310 goto bad_option; 1311 if (vals[0] >= 20 && vals[0] <= 66) { 1312 idebus_parameter = vals[0]; 1313 } else 1314 printk(" -- BAD BUS SPEED! Expected value from 20 to 66"); 1315 goto done; 1316 } 1317 /* 1318 * Look for interface options: "idex=" 1319 */ 1320 if (s[3] >= '0' && s[3] <= max_hwif) { 1321 /* 1322 * Be VERY CAREFUL changing this: note hardcoded indexes below 1323 * (-8, -9, -10) are reserved to ease the hardcoding. 1324 */ 1325 static const char *ide_words[] = { 1326 "noprobe", "serialize", "minus3", "minus4", 1327 "reset", "minus6", "ata66", "minus8", "minus9", 1328 "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb", 1329 "dtc2278", "umc8672", "ali14xx", NULL }; 1330 1331 hw_regs_t hwregs; 1332 1333 hw = s[3] - '0'; 1334 hwif = &ide_hwifs[hw]; 1335 i = match_parm(&s[4], ide_words, vals, 3); 1336 1337 /* 1338 * Cryptic check to ensure chipset not already set for hwif. 1339 * Note: we can't depend on hwif->chipset here. 1340 */ 1341 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) { 1342 /* chipset already specified */ 1343 if (is_chipset_set[hw]) 1344 goto bad_option; 1345 if (i > -18 && i <= -11) { 1346 /* these drivers are for "ide0=" only */ 1347 if (hw != 0) 1348 goto bad_hwif; 1349 /* chipset already specified for 2nd port */ 1350 if (is_chipset_set[hw+1]) 1351 goto bad_option; 1352 } 1353 is_chipset_set[hw] = 1; 1354 printk("\n"); 1355 } 1356 1357 switch (i) { 1358#ifdef CONFIG_BLK_DEV_ALI14XX 1359 case -17: /* "ali14xx" */ 1360 probe_ali14xx = 1; 1361 goto obsolete_option; 1362#endif 1363#ifdef CONFIG_BLK_DEV_UMC8672 1364 case -16: /* "umc8672" */ 1365 probe_umc8672 = 1; 1366 goto obsolete_option; 1367#endif 1368#ifdef CONFIG_BLK_DEV_DTC2278 1369 case -15: /* "dtc2278" */ 1370 probe_dtc2278 = 1; 1371 goto obsolete_option; 1372#endif 1373#ifdef CONFIG_BLK_DEV_CMD640 1374 case -14: /* "cmd640_vlb" */ 1375 cmd640_vlb = 1; 1376 goto obsolete_option; 1377#endif 1378#ifdef CONFIG_BLK_DEV_HT6560B 1379 case -13: /* "ht6560b" */ 1380 probe_ht6560b = 1; 1381 goto obsolete_option; 1382#endif 1383#ifdef CONFIG_BLK_DEV_QD65XX 1384 case -12: /* "qd65xx" */ 1385 probe_qd65xx = 1; 1386 goto obsolete_option; 1387#endif 1388#ifdef CONFIG_BLK_DEV_4DRIVES 1389 case -11: /* "four" drives on one set of ports */ 1390 { 1391 ide_hwif_t *mate = &ide_hwifs[hw^1]; 1392 mate->drives[0].select.all ^= 0x20; 1393 mate->drives[1].select.all ^= 0x20; 1394 hwif->chipset = mate->chipset = ide_4drives; 1395 mate->irq = hwif->irq; 1396 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports)); 1397 hwif->mate = mate; 1398 mate->mate = hwif; 1399 hwif->serialized = mate->serialized = 1; 1400 goto obsolete_option; 1401 } 1402#endif /* CONFIG_BLK_DEV_4DRIVES */ 1403 case -10: /* minus10 */ 1404 case -9: /* minus9 */ 1405 case -8: /* minus8 */ 1406 case -6: 1407 case -4: 1408 case -3: 1409 goto bad_option; 1410 case -7: /* ata66 */ 1411#ifdef CONFIG_BLK_DEV_IDEPCI 1412 /* 1413 * Use ATA_CBL_PATA40_SHORT so drive side 1414 * cable detection is also overriden. 1415 */ 1416 hwif->cbl = ATA_CBL_PATA40_SHORT; 1417 goto obsolete_option; 1418#else 1419 goto bad_hwif; 1420#endif 1421 case -5: /* "reset" */ 1422 hwif->reset = 1; 1423 goto obsolete_option; 1424 case -2: /* "serialize" */ 1425 hwif->mate = &ide_hwifs[hw^1]; 1426 hwif->mate->mate = hwif; 1427 hwif->serialized = hwif->mate->serialized = 1; 1428 goto obsolete_option; 1429 1430 case -1: /* "noprobe" */ 1431 hwif->noprobe = 1; 1432 goto obsolete_option; 1433 1434 case 1: /* base */ 1435 vals[1] = vals[0] + 0x206; /* default ctl */ 1436 case 2: /* base,ctl */ 1437 vals[2] = 0; /* default irq = probe for it */ 1438 case 3: /* base,ctl,irq */ 1439 memset(&hwregs, 0, sizeof(hwregs)); 1440 ide_init_hwif_ports(&hwregs, vals[0], vals[1], &hwif->irq); 1441 memcpy(hwif->io_ports, hwregs.io_ports, sizeof(hwif->io_ports)); 1442 hwif->irq = vals[2]; 1443 hwif->noprobe = 0; 1444 hwif->chipset = ide_forced; 1445 goto obsolete_option; 1446 1447 case 0: goto bad_option; 1448 default: 1449 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n"); 1450 return 1; 1451 } 1452 } 1453bad_option: 1454 printk(" -- BAD OPTION\n"); 1455 return 1; 1456obsolete_option: 1457 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n"); 1458 return 1; 1459bad_hwif: 1460 printk("-- NOT SUPPORTED ON ide%d", hw); 1461done: 1462 printk("\n"); 1463 return 1; 1464} 1465 1466EXPORT_SYMBOL(ide_lock); 1467 1468static int ide_bus_match(struct device *dev, struct device_driver *drv) 1469{ 1470 return 1; 1471} 1472 1473static char *media_string(ide_drive_t *drive) 1474{ 1475 switch (drive->media) { 1476 case ide_disk: 1477 return "disk"; 1478 case ide_cdrom: 1479 return "cdrom"; 1480 case ide_tape: 1481 return "tape"; 1482 case ide_floppy: 1483 return "floppy"; 1484 case ide_optical: 1485 return "optical"; 1486 default: 1487 return "UNKNOWN"; 1488 } 1489} 1490 1491static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf) 1492{ 1493 ide_drive_t *drive = to_ide_device(dev); 1494 return sprintf(buf, "%s\n", media_string(drive)); 1495} 1496 1497static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf) 1498{ 1499 ide_drive_t *drive = to_ide_device(dev); 1500 return sprintf(buf, "%s\n", drive->name); 1501} 1502 1503static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) 1504{ 1505 ide_drive_t *drive = to_ide_device(dev); 1506 return sprintf(buf, "ide:m-%s\n", media_string(drive)); 1507} 1508 1509static ssize_t model_show(struct device *dev, struct device_attribute *attr, 1510 char *buf) 1511{ 1512 ide_drive_t *drive = to_ide_device(dev); 1513 return sprintf(buf, "%s\n", drive->id->model); 1514} 1515 1516static ssize_t firmware_show(struct device *dev, struct device_attribute *attr, 1517 char *buf) 1518{ 1519 ide_drive_t *drive = to_ide_device(dev); 1520 return sprintf(buf, "%s\n", drive->id->fw_rev); 1521} 1522 1523static ssize_t serial_show(struct device *dev, struct device_attribute *attr, 1524 char *buf) 1525{ 1526 ide_drive_t *drive = to_ide_device(dev); 1527 return sprintf(buf, "%s\n", drive->id->serial_no); 1528} 1529 1530static struct device_attribute ide_dev_attrs[] = { 1531 __ATTR_RO(media), 1532 __ATTR_RO(drivename), 1533 __ATTR_RO(modalias), 1534 __ATTR_RO(model), 1535 __ATTR_RO(firmware), 1536 __ATTR(serial, 0400, serial_show, NULL), 1537 __ATTR_NULL 1538}; 1539 1540static int ide_uevent(struct device *dev, struct kobj_uevent_env *env) 1541{ 1542 ide_drive_t *drive = to_ide_device(dev); 1543 1544 add_uevent_var(env, "MEDIA=%s", media_string(drive)); 1545 add_uevent_var(env, "DRIVENAME=%s", drive->name); 1546 add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive)); 1547 return 0; 1548} 1549 1550static int generic_ide_probe(struct device *dev) 1551{ 1552 ide_drive_t *drive = to_ide_device(dev); 1553 ide_driver_t *drv = to_ide_driver(dev->driver); 1554 1555 return drv->probe ? drv->probe(drive) : -ENODEV; 1556} 1557 1558static int generic_ide_remove(struct device *dev) 1559{ 1560 ide_drive_t *drive = to_ide_device(dev); 1561 ide_driver_t *drv = to_ide_driver(dev->driver); 1562 1563 if (drv->remove) 1564 drv->remove(drive); 1565 1566 return 0; 1567} 1568 1569static void generic_ide_shutdown(struct device *dev) 1570{ 1571 ide_drive_t *drive = to_ide_device(dev); 1572 ide_driver_t *drv = to_ide_driver(dev->driver); 1573 1574 if (dev->driver && drv->shutdown) 1575 drv->shutdown(drive); 1576} 1577 1578struct bus_type ide_bus_type = { 1579 .name = "ide", 1580 .match = ide_bus_match, 1581 .uevent = ide_uevent, 1582 .probe = generic_ide_probe, 1583 .remove = generic_ide_remove, 1584 .shutdown = generic_ide_shutdown, 1585 .dev_attrs = ide_dev_attrs, 1586 .suspend = generic_ide_suspend, 1587 .resume = generic_ide_resume, 1588}; 1589 1590EXPORT_SYMBOL_GPL(ide_bus_type); 1591 1592/* 1593 * This is gets invoked once during initialization, to set *everything* up 1594 */ 1595static int __init ide_init(void) 1596{ 1597 int ret; 1598 1599 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n"); 1600 system_bus_speed = ide_system_bus_speed(); 1601 1602 printk(KERN_INFO "ide: Assuming %dMHz system bus speed " 1603 "for PIO modes%s\n", system_bus_speed, 1604 idebus_parameter ? "" : "; override with idebus=xx"); 1605 1606 ret = bus_register(&ide_bus_type); 1607 if (ret < 0) { 1608 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret); 1609 return ret; 1610 } 1611 1612 init_ide_data(); 1613 1614 proc_ide_create(); 1615 1616 return 0; 1617} 1618 1619#ifdef MODULE 1620static char *options = NULL; 1621module_param(options, charp, 0); 1622MODULE_LICENSE("GPL"); 1623 1624static void __init parse_options (char *line) 1625{ 1626 char *next = line; 1627 1628 if (line == NULL || !*line) 1629 return; 1630 while ((line = next) != NULL) { 1631 if ((next = strchr(line,' ')) != NULL) 1632 *next++ = 0; 1633 if (!ide_setup(line)) 1634 printk (KERN_INFO "Unknown option '%s'\n", line); 1635 } 1636} 1637 1638int __init init_module (void) 1639{ 1640 parse_options(options); 1641 return ide_init(); 1642} 1643 1644void __exit cleanup_module (void) 1645{ 1646 int index; 1647 1648 for (index = 0; index < MAX_HWIFS; ++index) 1649 ide_unregister(index, 0, 0); 1650 1651 proc_ide_destroy(); 1652 1653 bus_unregister(&ide_bus_type); 1654} 1655 1656#else /* !MODULE */ 1657 1658__setup("", ide_setup); 1659 1660module_init(ide_init); 1661 1662#endif /* MODULE */ 1663