ide.c revision eba8ff946177ca38dfde0bf1d8ce0703c45c49b9
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 93#ifdef CONFIG_IDEPCI_PCIBUS_ORDER 94int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */ 95#endif 96 97int noautodma = 0; 98 99#ifdef CONFIG_BLK_DEV_IDEACPI 100int ide_noacpi = 0; 101int ide_noacpitfs = 1; 102int ide_noacpionboot = 1; 103#endif 104 105/* 106 * This is declared extern in ide.h, for access by other IDE modules: 107 */ 108ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */ 109 110EXPORT_SYMBOL(ide_hwifs); 111 112/* 113 * Do not even *think* about calling this! 114 */ 115void ide_init_port_data(ide_hwif_t *hwif, unsigned int index) 116{ 117 unsigned int unit; 118 119 /* bulk initialize hwif & drive info with zeros */ 120 memset(hwif, 0, sizeof(ide_hwif_t)); 121 122 /* fill in any non-zero initial values */ 123 hwif->index = index; 124 hwif->major = ide_hwif_to_major[index]; 125 126 hwif->name[0] = 'i'; 127 hwif->name[1] = 'd'; 128 hwif->name[2] = 'e'; 129 hwif->name[3] = '0' + index; 130 131 hwif->bus_state = BUSSTATE_ON; 132 133 init_completion(&hwif->gendev_rel_comp); 134 135 default_hwif_iops(hwif); 136 default_hwif_transport(hwif); 137 for (unit = 0; unit < MAX_DRIVES; ++unit) { 138 ide_drive_t *drive = &hwif->drives[unit]; 139 140 drive->media = ide_disk; 141 drive->select.all = (unit<<4)|0xa0; 142 drive->hwif = hwif; 143 drive->ctl = 0x08; 144 drive->ready_stat = READY_STAT; 145 drive->bad_wstat = BAD_W_STAT; 146 drive->special.b.recalibrate = 1; 147 drive->special.b.set_geometry = 1; 148 drive->name[0] = 'h'; 149 drive->name[1] = 'd'; 150 drive->name[2] = 'a' + (index * MAX_DRIVES) + unit; 151 drive->max_failures = IDE_DEFAULT_MAX_FAILURES; 152 drive->using_dma = 0; 153 drive->vdma = 0; 154 INIT_LIST_HEAD(&drive->list); 155 init_completion(&drive->gendev_rel_comp); 156 } 157} 158EXPORT_SYMBOL_GPL(ide_init_port_data); 159 160static void init_hwif_default(ide_hwif_t *hwif, unsigned int index) 161{ 162 hw_regs_t hw; 163 164 memset(&hw, 0, sizeof(hw_regs_t)); 165 166 ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq); 167 168 memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports)); 169 170 hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET]; 171#ifdef CONFIG_BLK_DEV_HD 172 if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA) 173 hwif->noprobe = 1; /* may be overridden by ide_setup() */ 174#endif 175} 176 177/* 178 * init_ide_data() sets reasonable default values into all fields 179 * of all instances of the hwifs and drives, but only on the first call. 180 * Subsequent calls have no effect (they don't wipe out anything). 181 * 182 * This routine is normally called at driver initialization time, 183 * but may also be called MUCH earlier during kernel "command-line" 184 * parameter processing. As such, we cannot depend on any other parts 185 * of the kernel (such as memory allocation) to be functioning yet. 186 * 187 * This is too bad, as otherwise we could dynamically allocate the 188 * ide_drive_t structs as needed, rather than always consuming memory 189 * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them. 190 * 191 * FIXME: We should stuff the setup data into __init and copy the 192 * relevant hwifs/allocate them properly during boot. 193 */ 194#define MAGIC_COOKIE 0x12345678 195static void __init init_ide_data (void) 196{ 197 ide_hwif_t *hwif; 198 unsigned int index; 199 static unsigned long magic_cookie = MAGIC_COOKIE; 200 201 if (magic_cookie != MAGIC_COOKIE) 202 return; /* already initialized */ 203 magic_cookie = 0; 204 205 /* Initialise all interface structures */ 206 for (index = 0; index < MAX_HWIFS; ++index) { 207 hwif = &ide_hwifs[index]; 208 ide_init_port_data(hwif, index); 209 init_hwif_default(hwif, index); 210#if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI) 211 hwif->irq = 212 ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]); 213#endif 214 } 215} 216 217/** 218 * ide_system_bus_speed - guess bus speed 219 * 220 * ide_system_bus_speed() returns what we think is the system VESA/PCI 221 * bus speed (in MHz). This is used for calculating interface PIO timings. 222 * The default is 40 for known PCI systems, 50 otherwise. 223 * The "idebus=xx" parameter can be used to override this value. 224 * The actual value to be used is computed/displayed the first time 225 * through. Drivers should only use this as a last resort. 226 * 227 * Returns a guessed speed in MHz. 228 */ 229 230static int ide_system_bus_speed(void) 231{ 232#ifdef CONFIG_PCI 233 static struct pci_device_id pci_default[] = { 234 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) }, 235 { } 236 }; 237#else 238#define pci_default 0 239#endif /* CONFIG_PCI */ 240 241 /* user supplied value */ 242 if (idebus_parameter) 243 return idebus_parameter; 244 245 /* safe default value for PCI or VESA and PCI*/ 246 return pci_dev_present(pci_default) ? 33 : 50; 247} 248 249ide_hwif_t * ide_find_port(unsigned long base) 250{ 251 ide_hwif_t *hwif; 252 int i; 253 254 for (i = 0; i < MAX_HWIFS; i++) { 255 hwif = &ide_hwifs[i]; 256 if (hwif->io_ports[IDE_DATA_OFFSET] == base) 257 goto found; 258 } 259 260 for (i = 0; i < MAX_HWIFS; i++) { 261 hwif = &ide_hwifs[i]; 262 if (hwif->io_ports[IDE_DATA_OFFSET] == 0) 263 goto found; 264 } 265 266 hwif = NULL; 267found: 268 return hwif; 269} 270 271EXPORT_SYMBOL_GPL(ide_find_port); 272 273static struct resource* hwif_request_region(ide_hwif_t *hwif, 274 unsigned long addr, int num) 275{ 276 struct resource *res = request_region(addr, num, hwif->name); 277 278 if (!res) 279 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n", 280 hwif->name, addr, addr+num-1); 281 return res; 282} 283 284/** 285 * ide_hwif_request_regions - request resources for IDE 286 * @hwif: interface to use 287 * 288 * Requests all the needed resources for an interface. 289 * Right now core IDE code does this work which is deeply wrong. 290 * MMIO leaves it to the controller driver, 291 * PIO will migrate this way over time. 292 */ 293 294int ide_hwif_request_regions(ide_hwif_t *hwif) 295{ 296 unsigned long addr; 297 unsigned int i; 298 299 if (hwif->mmio) 300 return 0; 301 addr = hwif->io_ports[IDE_CONTROL_OFFSET]; 302 if (addr && !hwif_request_region(hwif, addr, 1)) 303 goto control_region_busy; 304 hwif->straight8 = 0; 305 addr = hwif->io_ports[IDE_DATA_OFFSET]; 306 if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) { 307 if (!hwif_request_region(hwif, addr, 8)) 308 goto data_region_busy; 309 hwif->straight8 = 1; 310 return 0; 311 } 312 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) { 313 addr = hwif->io_ports[i]; 314 if (!hwif_request_region(hwif, addr, 1)) { 315 while (--i) 316 release_region(addr, 1); 317 goto data_region_busy; 318 } 319 } 320 return 0; 321 322data_region_busy: 323 addr = hwif->io_ports[IDE_CONTROL_OFFSET]; 324 if (addr) 325 release_region(addr, 1); 326control_region_busy: 327 /* If any errors are return, we drop the hwif interface. */ 328 return -EBUSY; 329} 330 331/** 332 * ide_hwif_release_regions - free IDE resources 333 * 334 * Note that we only release the standard ports, 335 * and do not even try to handle any extra ports 336 * allocated for weird IDE interface chipsets. 337 * 338 * Note also that we don't yet handle mmio resources here. More 339 * importantly our caller should be doing this so we need to 340 * restructure this as a helper function for drivers. 341 */ 342 343void ide_hwif_release_regions(ide_hwif_t *hwif) 344{ 345 u32 i = 0; 346 347 if (hwif->mmio) 348 return; 349 if (hwif->io_ports[IDE_CONTROL_OFFSET]) 350 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1); 351 if (hwif->straight8) { 352 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8); 353 return; 354 } 355 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) 356 if (hwif->io_ports[i]) 357 release_region(hwif->io_ports[i], 1); 358} 359 360/** 361 * ide_hwif_restore - restore hwif to template 362 * @hwif: hwif to update 363 * @tmp_hwif: template 364 * 365 * Restore hwif to a previous state by copying most settings 366 * from the template. 367 */ 368 369static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif) 370{ 371 hwif->hwgroup = tmp_hwif->hwgroup; 372 373 hwif->gendev.parent = tmp_hwif->gendev.parent; 374 375 hwif->proc = tmp_hwif->proc; 376 377 hwif->major = tmp_hwif->major; 378 hwif->straight8 = tmp_hwif->straight8; 379 hwif->bus_state = tmp_hwif->bus_state; 380 381 hwif->host_flags = tmp_hwif->host_flags; 382 383 hwif->pio_mask = tmp_hwif->pio_mask; 384 385 hwif->ultra_mask = tmp_hwif->ultra_mask; 386 hwif->mwdma_mask = tmp_hwif->mwdma_mask; 387 hwif->swdma_mask = tmp_hwif->swdma_mask; 388 389 hwif->cbl = tmp_hwif->cbl; 390 391 hwif->chipset = tmp_hwif->chipset; 392 hwif->hold = tmp_hwif->hold; 393 394 hwif->dev = tmp_hwif->dev; 395 396#ifdef CONFIG_BLK_DEV_IDEPCI 397 hwif->cds = tmp_hwif->cds; 398#endif 399 400 hwif->set_pio_mode = tmp_hwif->set_pio_mode; 401 hwif->set_dma_mode = tmp_hwif->set_dma_mode; 402 hwif->mdma_filter = tmp_hwif->mdma_filter; 403 hwif->udma_filter = tmp_hwif->udma_filter; 404 hwif->selectproc = tmp_hwif->selectproc; 405 hwif->reset_poll = tmp_hwif->reset_poll; 406 hwif->pre_reset = tmp_hwif->pre_reset; 407 hwif->resetproc = tmp_hwif->resetproc; 408 hwif->maskproc = tmp_hwif->maskproc; 409 hwif->quirkproc = tmp_hwif->quirkproc; 410 hwif->busproc = tmp_hwif->busproc; 411 412 hwif->ata_input_data = tmp_hwif->ata_input_data; 413 hwif->ata_output_data = tmp_hwif->ata_output_data; 414 hwif->atapi_input_bytes = tmp_hwif->atapi_input_bytes; 415 hwif->atapi_output_bytes = tmp_hwif->atapi_output_bytes; 416 417 hwif->dma_host_set = tmp_hwif->dma_host_set; 418 hwif->dma_setup = tmp_hwif->dma_setup; 419 hwif->dma_exec_cmd = tmp_hwif->dma_exec_cmd; 420 hwif->dma_start = tmp_hwif->dma_start; 421 hwif->ide_dma_end = tmp_hwif->ide_dma_end; 422 hwif->ide_dma_test_irq = tmp_hwif->ide_dma_test_irq; 423 hwif->ide_dma_clear_irq = tmp_hwif->ide_dma_clear_irq; 424 hwif->dma_lost_irq = tmp_hwif->dma_lost_irq; 425 hwif->dma_timeout = tmp_hwif->dma_timeout; 426 427 hwif->OUTB = tmp_hwif->OUTB; 428 hwif->OUTBSYNC = tmp_hwif->OUTBSYNC; 429 hwif->OUTW = tmp_hwif->OUTW; 430 hwif->OUTSW = tmp_hwif->OUTSW; 431 hwif->OUTSL = tmp_hwif->OUTSL; 432 433 hwif->INB = tmp_hwif->INB; 434 hwif->INW = tmp_hwif->INW; 435 hwif->INSW = tmp_hwif->INSW; 436 hwif->INSL = tmp_hwif->INSL; 437 438 hwif->sg_max_nents = tmp_hwif->sg_max_nents; 439 440 hwif->mmio = tmp_hwif->mmio; 441 hwif->rqsize = tmp_hwif->rqsize; 442 443#ifndef CONFIG_BLK_DEV_IDECS 444 hwif->irq = tmp_hwif->irq; 445#endif 446 447 hwif->dma_base = tmp_hwif->dma_base; 448 hwif->dma_command = tmp_hwif->dma_command; 449 hwif->dma_vendor1 = tmp_hwif->dma_vendor1; 450 hwif->dma_status = tmp_hwif->dma_status; 451 hwif->dma_vendor3 = tmp_hwif->dma_vendor3; 452 hwif->dma_prdtable = tmp_hwif->dma_prdtable; 453 454 hwif->config_data = tmp_hwif->config_data; 455 hwif->select_data = tmp_hwif->select_data; 456 hwif->extra_base = tmp_hwif->extra_base; 457 hwif->extra_ports = tmp_hwif->extra_ports; 458 459 hwif->hwif_data = tmp_hwif->hwif_data; 460} 461 462void ide_remove_port_from_hwgroup(ide_hwif_t *hwif) 463{ 464 ide_hwgroup_t *hwgroup = hwif->hwgroup; 465 466 spin_lock_irq(&ide_lock); 467 /* 468 * Remove us from the hwgroup, and free 469 * the hwgroup if we were the only member 470 */ 471 if (hwif->next == hwif) { 472 BUG_ON(hwgroup->hwif != hwif); 473 kfree(hwgroup); 474 } else { 475 /* There is another interface in hwgroup. 476 * Unlink us, and set hwgroup->drive and ->hwif to 477 * something sane. 478 */ 479 ide_hwif_t *g = hwgroup->hwif; 480 481 while (g->next != hwif) 482 g = g->next; 483 g->next = hwif->next; 484 if (hwgroup->hwif == hwif) { 485 /* Chose a random hwif for hwgroup->hwif. 486 * It's guaranteed that there are no drives 487 * left in the hwgroup. 488 */ 489 BUG_ON(hwgroup->drive != NULL); 490 hwgroup->hwif = g; 491 } 492 BUG_ON(hwgroup->hwif == hwif); 493 } 494 spin_unlock_irq(&ide_lock); 495} 496 497/** 498 * ide_unregister - free an IDE interface 499 * @index: index of interface (will change soon to a pointer) 500 * @init_default: init default hwif flag 501 * @restore: restore hwif flag 502 * 503 * Perform the final unregister of an IDE interface. At the moment 504 * we don't refcount interfaces so this will also get split up. 505 * 506 * Locking: 507 * The caller must not hold the IDE locks 508 * The drive present/vanishing is not yet properly locked 509 * Take care with the callbacks. These have been split to avoid 510 * deadlocking the IDE layer. The shutdown callback is called 511 * before we take the lock and free resources. It is up to the 512 * caller to be sure there is no pending I/O here, and that 513 * the interface will not be reopened (present/vanishing locking 514 * isn't yet done BTW). After we commit to the final kill we 515 * call the cleanup callback with the ide locks held. 516 * 517 * Unregister restores the hwif structures to the default state. 518 * This is raving bonkers. 519 */ 520 521void ide_unregister(unsigned int index, int init_default, int restore) 522{ 523 ide_drive_t *drive; 524 ide_hwif_t *hwif, *g; 525 static ide_hwif_t tmp_hwif; /* protected by ide_cfg_mtx */ 526 ide_hwgroup_t *hwgroup; 527 int irq_count = 0, unit; 528 529 BUG_ON(index >= MAX_HWIFS); 530 531 BUG_ON(in_interrupt()); 532 BUG_ON(irqs_disabled()); 533 mutex_lock(&ide_cfg_mtx); 534 spin_lock_irq(&ide_lock); 535 hwif = &ide_hwifs[index]; 536 if (!hwif->present) 537 goto abort; 538 for (unit = 0; unit < MAX_DRIVES; ++unit) { 539 drive = &hwif->drives[unit]; 540 if (!drive->present) 541 continue; 542 spin_unlock_irq(&ide_lock); 543 device_unregister(&drive->gendev); 544 wait_for_completion(&drive->gendev_rel_comp); 545 spin_lock_irq(&ide_lock); 546 } 547 hwif->present = 0; 548 549 spin_unlock_irq(&ide_lock); 550 551 ide_proc_unregister_port(hwif); 552 553 hwgroup = hwif->hwgroup; 554 /* 555 * free the irq if we were the only hwif using it 556 */ 557 g = hwgroup->hwif; 558 do { 559 if (g->irq == hwif->irq) 560 ++irq_count; 561 g = g->next; 562 } while (g != hwgroup->hwif); 563 if (irq_count == 1) 564 free_irq(hwif->irq, hwgroup); 565 566 ide_remove_port_from_hwgroup(hwif); 567 568 device_unregister(&hwif->gendev); 569 wait_for_completion(&hwif->gendev_rel_comp); 570 571 /* 572 * Remove us from the kernel's knowledge 573 */ 574 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS); 575 kfree(hwif->sg_table); 576 unregister_blkdev(hwif->major, hwif->name); 577 spin_lock_irq(&ide_lock); 578 579 if (hwif->dma_base) { 580 (void) ide_release_dma(hwif); 581 582 hwif->dma_base = 0; 583 hwif->dma_command = 0; 584 hwif->dma_vendor1 = 0; 585 hwif->dma_status = 0; 586 hwif->dma_vendor3 = 0; 587 hwif->dma_prdtable = 0; 588 589 hwif->extra_base = 0; 590 hwif->extra_ports = 0; 591 } 592 593 /* 594 * Note that we only release the standard ports, 595 * and do not even try to handle any extra ports 596 * allocated for weird IDE interface chipsets. 597 */ 598 ide_hwif_release_regions(hwif); 599 600 /* copy original settings */ 601 tmp_hwif = *hwif; 602 603 /* restore hwif data to pristine status */ 604 ide_init_port_data(hwif, index); 605 606 if (init_default) 607 init_hwif_default(hwif, index); 608 609 if (restore) 610 ide_hwif_restore(hwif, &tmp_hwif); 611 612abort: 613 spin_unlock_irq(&ide_lock); 614 mutex_unlock(&ide_cfg_mtx); 615} 616 617EXPORT_SYMBOL(ide_unregister); 618 619void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw) 620{ 621 memcpy(hwif->io_ports, hw->io_ports, sizeof(hwif->io_ports)); 622 hwif->irq = hw->irq; 623 hwif->noprobe = 0; 624 hwif->chipset = hw->chipset; 625 hwif->gendev.parent = hw->dev; 626 hwif->ack_intr = hw->ack_intr; 627} 628EXPORT_SYMBOL_GPL(ide_init_port_hw); 629 630ide_hwif_t *ide_deprecated_find_port(unsigned long base) 631{ 632 ide_hwif_t *hwif; 633 int i; 634 635 for (i = 0; i < MAX_HWIFS; i++) { 636 hwif = &ide_hwifs[i]; 637 if (hwif->io_ports[IDE_DATA_OFFSET] == base) 638 goto found; 639 } 640 641 for (i = 0; i < MAX_HWIFS; i++) { 642 hwif = &ide_hwifs[i]; 643 if (hwif->hold) 644 continue; 645 if (!hwif->present && hwif->mate == NULL) 646 goto found; 647 } 648 649 hwif = NULL; 650found: 651 return hwif; 652} 653EXPORT_SYMBOL_GPL(ide_deprecated_find_port); 654 655/** 656 * ide_register_hw - register IDE interface 657 * @hw: hardware registers 658 * @quirkproc: quirkproc function 659 * @hwifp: pointer to returned hwif 660 * 661 * Register an IDE interface, specifying exactly the registers etc. 662 * 663 * Returns -1 on error. 664 */ 665 666int ide_register_hw(hw_regs_t *hw, void (*quirkproc)(ide_drive_t *), 667 ide_hwif_t **hwifp) 668{ 669 int index, retry = 1; 670 ide_hwif_t *hwif; 671 u8 idx[4] = { 0xff, 0xff, 0xff, 0xff }; 672 673 do { 674 hwif = ide_deprecated_find_port(hw->io_ports[IDE_DATA_OFFSET]); 675 index = hwif->index; 676 if (hwif) 677 goto found; 678 for (index = 0; index < MAX_HWIFS; index++) 679 ide_unregister(index, 1, 1); 680 } while (retry--); 681 return -1; 682found: 683 if (hwif->present) 684 ide_unregister(index, 0, 1); 685 else if (!hwif->hold) 686 ide_init_port_data(hwif, index); 687 688 ide_init_port_hw(hwif, hw); 689 hwif->quirkproc = quirkproc; 690 691 idx[0] = index; 692 693 ide_device_add(idx, NULL); 694 695 if (hwifp) 696 *hwifp = hwif; 697 698 return hwif->present ? index : -1; 699} 700 701EXPORT_SYMBOL(ide_register_hw); 702 703/* 704 * Locks for IDE setting functionality 705 */ 706 707DEFINE_MUTEX(ide_setting_mtx); 708 709EXPORT_SYMBOL_GPL(ide_setting_mtx); 710 711/** 712 * ide_spin_wait_hwgroup - wait for group 713 * @drive: drive in the group 714 * 715 * Wait for an IDE device group to go non busy and then return 716 * holding the ide_lock which guards the hwgroup->busy status 717 * and right to use it. 718 */ 719 720int ide_spin_wait_hwgroup (ide_drive_t *drive) 721{ 722 ide_hwgroup_t *hwgroup = HWGROUP(drive); 723 unsigned long timeout = jiffies + (3 * HZ); 724 725 spin_lock_irq(&ide_lock); 726 727 while (hwgroup->busy) { 728 unsigned long lflags; 729 spin_unlock_irq(&ide_lock); 730 local_irq_set(lflags); 731 if (time_after(jiffies, timeout)) { 732 local_irq_restore(lflags); 733 printk(KERN_ERR "%s: channel busy\n", drive->name); 734 return -EBUSY; 735 } 736 local_irq_restore(lflags); 737 spin_lock_irq(&ide_lock); 738 } 739 return 0; 740} 741 742EXPORT_SYMBOL(ide_spin_wait_hwgroup); 743 744int set_io_32bit(ide_drive_t *drive, int arg) 745{ 746 if (drive->no_io_32bit) 747 return -EPERM; 748 749 if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1)) 750 return -EINVAL; 751 752 if (ide_spin_wait_hwgroup(drive)) 753 return -EBUSY; 754 755 drive->io_32bit = arg; 756 757 spin_unlock_irq(&ide_lock); 758 759 return 0; 760} 761 762static int set_ksettings(ide_drive_t *drive, int arg) 763{ 764 if (arg < 0 || arg > 1) 765 return -EINVAL; 766 767 if (ide_spin_wait_hwgroup(drive)) 768 return -EBUSY; 769 drive->keep_settings = arg; 770 spin_unlock_irq(&ide_lock); 771 772 return 0; 773} 774 775int set_using_dma(ide_drive_t *drive, int arg) 776{ 777#ifdef CONFIG_BLK_DEV_IDEDMA 778 ide_hwif_t *hwif = drive->hwif; 779 int err = -EPERM; 780 781 if (arg < 0 || arg > 1) 782 return -EINVAL; 783 784 if (!drive->id || !(drive->id->capability & 1)) 785 goto out; 786 787 if (hwif->dma_host_set == NULL) 788 goto out; 789 790 err = -EBUSY; 791 if (ide_spin_wait_hwgroup(drive)) 792 goto out; 793 /* 794 * set ->busy flag, unlock and let it ride 795 */ 796 hwif->hwgroup->busy = 1; 797 spin_unlock_irq(&ide_lock); 798 799 err = 0; 800 801 if (arg) { 802 if (ide_set_dma(drive)) 803 err = -EIO; 804 } else 805 ide_dma_off(drive); 806 807 /* 808 * lock, clear ->busy flag and unlock before leaving 809 */ 810 spin_lock_irq(&ide_lock); 811 hwif->hwgroup->busy = 0; 812 spin_unlock_irq(&ide_lock); 813out: 814 return err; 815#else 816 if (arg < 0 || arg > 1) 817 return -EINVAL; 818 819 return -EPERM; 820#endif 821} 822 823int set_pio_mode(ide_drive_t *drive, int arg) 824{ 825 struct request rq; 826 827 if (arg < 0 || arg > 255) 828 return -EINVAL; 829 830 if (drive->hwif->set_pio_mode == NULL) 831 return -ENOSYS; 832 833 if (drive->special.b.set_tune) 834 return -EBUSY; 835 836 ide_init_drive_cmd(&rq); 837 rq.cmd_type = REQ_TYPE_ATA_TASKFILE; 838 839 drive->tune_req = (u8) arg; 840 drive->special.b.set_tune = 1; 841 (void) ide_do_drive_cmd(drive, &rq, ide_wait); 842 return 0; 843} 844 845static int set_unmaskirq(ide_drive_t *drive, int arg) 846{ 847 if (drive->no_unmask) 848 return -EPERM; 849 850 if (arg < 0 || arg > 1) 851 return -EINVAL; 852 853 if (ide_spin_wait_hwgroup(drive)) 854 return -EBUSY; 855 drive->unmask = arg; 856 spin_unlock_irq(&ide_lock); 857 858 return 0; 859} 860 861/** 862 * system_bus_clock - clock guess 863 * 864 * External version of the bus clock guess used by very old IDE drivers 865 * for things like VLB timings. Should not be used. 866 */ 867 868int system_bus_clock (void) 869{ 870 return system_bus_speed; 871} 872 873EXPORT_SYMBOL(system_bus_clock); 874 875static int generic_ide_suspend(struct device *dev, pm_message_t mesg) 876{ 877 ide_drive_t *drive = dev->driver_data; 878 ide_hwif_t *hwif = HWIF(drive); 879 struct request rq; 880 struct request_pm_state rqpm; 881 ide_task_t args; 882 int ret; 883 884 /* Call ACPI _GTM only once */ 885 if (!(drive->dn % 2)) 886 ide_acpi_get_timing(hwif); 887 888 memset(&rq, 0, sizeof(rq)); 889 memset(&rqpm, 0, sizeof(rqpm)); 890 memset(&args, 0, sizeof(args)); 891 rq.cmd_type = REQ_TYPE_PM_SUSPEND; 892 rq.special = &args; 893 rq.data = &rqpm; 894 rqpm.pm_step = ide_pm_state_start_suspend; 895 if (mesg.event == PM_EVENT_PRETHAW) 896 mesg.event = PM_EVENT_FREEZE; 897 rqpm.pm_state = mesg.event; 898 899 ret = ide_do_drive_cmd(drive, &rq, ide_wait); 900 /* only call ACPI _PS3 after both drivers are suspended */ 901 if (!ret && (((drive->dn % 2) && hwif->drives[0].present 902 && hwif->drives[1].present) 903 || !hwif->drives[0].present 904 || !hwif->drives[1].present)) 905 ide_acpi_set_state(hwif, 0); 906 return ret; 907} 908 909static int generic_ide_resume(struct device *dev) 910{ 911 ide_drive_t *drive = dev->driver_data; 912 ide_hwif_t *hwif = HWIF(drive); 913 struct request rq; 914 struct request_pm_state rqpm; 915 ide_task_t args; 916 int err; 917 918 /* Call ACPI _STM only once */ 919 if (!(drive->dn % 2)) { 920 ide_acpi_set_state(hwif, 1); 921 ide_acpi_push_timing(hwif); 922 } 923 924 ide_acpi_exec_tfs(drive); 925 926 memset(&rq, 0, sizeof(rq)); 927 memset(&rqpm, 0, sizeof(rqpm)); 928 memset(&args, 0, sizeof(args)); 929 rq.cmd_type = REQ_TYPE_PM_RESUME; 930 rq.special = &args; 931 rq.data = &rqpm; 932 rqpm.pm_step = ide_pm_state_start_resume; 933 rqpm.pm_state = PM_EVENT_ON; 934 935 err = ide_do_drive_cmd(drive, &rq, ide_head_wait); 936 937 if (err == 0 && dev->driver) { 938 ide_driver_t *drv = to_ide_driver(dev->driver); 939 940 if (drv->resume) 941 drv->resume(drive); 942 } 943 944 return err; 945} 946 947int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev, 948 unsigned int cmd, unsigned long arg) 949{ 950 unsigned long flags; 951 ide_driver_t *drv; 952 void __user *p = (void __user *)arg; 953 int err = 0, (*setfunc)(ide_drive_t *, int); 954 u8 *val; 955 956 switch (cmd) { 957 case HDIO_GET_32BIT: val = &drive->io_32bit; goto read_val; 958 case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val; 959 case HDIO_GET_UNMASKINTR: val = &drive->unmask; goto read_val; 960 case HDIO_GET_DMA: val = &drive->using_dma; goto read_val; 961 case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val; 962 case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val; 963 case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val; 964 case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val; 965 case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val; 966 } 967 968 switch (cmd) { 969 case HDIO_OBSOLETE_IDENTITY: 970 case HDIO_GET_IDENTITY: 971 if (bdev != bdev->bd_contains) 972 return -EINVAL; 973 if (drive->id_read == 0) 974 return -ENOMSG; 975 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142)) 976 return -EFAULT; 977 return 0; 978 979 case HDIO_GET_NICE: 980 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP | 981 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP | 982 drive->nice1 << IDE_NICE_1, 983 (long __user *) arg); 984#ifdef CONFIG_IDE_TASK_IOCTL 985 case HDIO_DRIVE_TASKFILE: 986 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 987 return -EACCES; 988 switch(drive->media) { 989 case ide_disk: 990 return ide_taskfile_ioctl(drive, cmd, arg); 991 default: 992 return -ENOMSG; 993 } 994#endif /* CONFIG_IDE_TASK_IOCTL */ 995 996 case HDIO_DRIVE_CMD: 997 if (!capable(CAP_SYS_RAWIO)) 998 return -EACCES; 999 return ide_cmd_ioctl(drive, cmd, arg); 1000 1001 case HDIO_DRIVE_TASK: 1002 if (!capable(CAP_SYS_RAWIO)) 1003 return -EACCES; 1004 return ide_task_ioctl(drive, cmd, arg); 1005 1006 case HDIO_SCAN_HWIF: 1007 { 1008 hw_regs_t hw; 1009 int args[3]; 1010 if (!capable(CAP_SYS_RAWIO)) return -EACCES; 1011 if (copy_from_user(args, p, 3 * sizeof(int))) 1012 return -EFAULT; 1013 memset(&hw, 0, sizeof(hw)); 1014 ide_init_hwif_ports(&hw, (unsigned long) args[0], 1015 (unsigned long) args[1], NULL); 1016 hw.irq = args[2]; 1017 if (ide_register_hw(&hw, NULL, NULL) == -1) 1018 return -EIO; 1019 return 0; 1020 } 1021 case HDIO_UNREGISTER_HWIF: 1022 if (!capable(CAP_SYS_RAWIO)) return -EACCES; 1023 /* (arg > MAX_HWIFS) checked in function */ 1024 ide_unregister(arg, 1, 1); 1025 return 0; 1026 case HDIO_SET_NICE: 1027 if (!capable(CAP_SYS_ADMIN)) return -EACCES; 1028 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1)))) 1029 return -EPERM; 1030 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1; 1031 drv = *(ide_driver_t **)bdev->bd_disk->private_data; 1032 if (drive->dsc_overlap && !drv->supports_dsc_overlap) { 1033 drive->dsc_overlap = 0; 1034 return -EPERM; 1035 } 1036 drive->nice1 = (arg >> IDE_NICE_1) & 1; 1037 return 0; 1038 case HDIO_DRIVE_RESET: 1039 { 1040 unsigned long flags; 1041 if (!capable(CAP_SYS_ADMIN)) return -EACCES; 1042 1043 /* 1044 * Abort the current command on the 1045 * group if there is one, taking 1046 * care not to allow anything else 1047 * to be queued and to die on the 1048 * spot if we miss one somehow 1049 */ 1050 1051 spin_lock_irqsave(&ide_lock, flags); 1052 1053 if (HWGROUP(drive)->resetting) { 1054 spin_unlock_irqrestore(&ide_lock, flags); 1055 return -EBUSY; 1056 } 1057 1058 ide_abort(drive, "drive reset"); 1059 1060 BUG_ON(HWGROUP(drive)->handler); 1061 1062 /* Ensure nothing gets queued after we 1063 drop the lock. Reset will clear the busy */ 1064 1065 HWGROUP(drive)->busy = 1; 1066 spin_unlock_irqrestore(&ide_lock, flags); 1067 (void) ide_do_reset(drive); 1068 1069 return 0; 1070 } 1071 1072 case HDIO_GET_BUSSTATE: 1073 if (!capable(CAP_SYS_ADMIN)) 1074 return -EACCES; 1075 if (put_user(HWIF(drive)->bus_state, (long __user *)arg)) 1076 return -EFAULT; 1077 return 0; 1078 1079 case HDIO_SET_BUSSTATE: 1080 if (!capable(CAP_SYS_ADMIN)) 1081 return -EACCES; 1082 if (HWIF(drive)->busproc) 1083 return HWIF(drive)->busproc(drive, (int)arg); 1084 return -EOPNOTSUPP; 1085 default: 1086 return -EINVAL; 1087 } 1088 1089read_val: 1090 mutex_lock(&ide_setting_mtx); 1091 spin_lock_irqsave(&ide_lock, flags); 1092 err = *val; 1093 spin_unlock_irqrestore(&ide_lock, flags); 1094 mutex_unlock(&ide_setting_mtx); 1095 return err >= 0 ? put_user(err, (long __user *)arg) : err; 1096 1097set_val: 1098 if (bdev != bdev->bd_contains) 1099 err = -EINVAL; 1100 else { 1101 if (!capable(CAP_SYS_ADMIN)) 1102 err = -EACCES; 1103 else { 1104 mutex_lock(&ide_setting_mtx); 1105 err = setfunc(drive, arg); 1106 mutex_unlock(&ide_setting_mtx); 1107 } 1108 } 1109 return err; 1110} 1111 1112EXPORT_SYMBOL(generic_ide_ioctl); 1113 1114/* 1115 * stridx() returns the offset of c within s, 1116 * or -1 if c is '\0' or not found within s. 1117 */ 1118static int __init stridx (const char *s, char c) 1119{ 1120 char *i = strchr(s, c); 1121 return (i && c) ? i - s : -1; 1122} 1123 1124/* 1125 * match_parm() does parsing for ide_setup(): 1126 * 1127 * 1. the first char of s must be '='. 1128 * 2. if the remainder matches one of the supplied keywords, 1129 * the index (1 based) of the keyword is negated and returned. 1130 * 3. if the remainder is a series of no more than max_vals numbers 1131 * separated by commas, the numbers are saved in vals[] and a 1132 * count of how many were saved is returned. Base10 is assumed, 1133 * and base16 is allowed when prefixed with "0x". 1134 * 4. otherwise, zero is returned. 1135 */ 1136static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals) 1137{ 1138 static const char *decimal = "0123456789"; 1139 static const char *hex = "0123456789abcdef"; 1140 int i, n; 1141 1142 if (*s++ == '=') { 1143 /* 1144 * Try matching against the supplied keywords, 1145 * and return -(index+1) if we match one 1146 */ 1147 if (keywords != NULL) { 1148 for (i = 0; *keywords != NULL; ++i) { 1149 if (!strcmp(s, *keywords++)) 1150 return -(i+1); 1151 } 1152 } 1153 /* 1154 * Look for a series of no more than "max_vals" 1155 * numeric values separated by commas, in base10, 1156 * or base16 when prefixed with "0x". 1157 * Return a count of how many were found. 1158 */ 1159 for (n = 0; (i = stridx(decimal, *s)) >= 0;) { 1160 vals[n] = i; 1161 while ((i = stridx(decimal, *++s)) >= 0) 1162 vals[n] = (vals[n] * 10) + i; 1163 if (*s == 'x' && !vals[n]) { 1164 while ((i = stridx(hex, *++s)) >= 0) 1165 vals[n] = (vals[n] * 0x10) + i; 1166 } 1167 if (++n == max_vals) 1168 break; 1169 if (*s == ',' || *s == ';') 1170 ++s; 1171 } 1172 if (!*s) 1173 return n; 1174 } 1175 return 0; /* zero = nothing matched */ 1176} 1177 1178extern int probe_ali14xx; 1179extern int probe_umc8672; 1180extern int probe_dtc2278; 1181extern int probe_ht6560b; 1182extern int probe_qd65xx; 1183extern int cmd640_vlb; 1184 1185static int __initdata is_chipset_set[MAX_HWIFS]; 1186 1187/* 1188 * ide_setup() gets called VERY EARLY during initialization, 1189 * to handle kernel "command line" strings beginning with "hdx=" or "ide". 1190 * 1191 * Remember to update Documentation/ide.txt if you change something here. 1192 */ 1193static int __init ide_setup(char *s) 1194{ 1195 int i, vals[3]; 1196 ide_hwif_t *hwif; 1197 ide_drive_t *drive; 1198 unsigned int hw, unit; 1199 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1); 1200 const char max_hwif = '0' + (MAX_HWIFS - 1); 1201 1202 1203 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */ 1204 return 0; /* driver and not us */ 1205 1206 if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2)) 1207 return 0; 1208 1209 printk(KERN_INFO "ide_setup: %s", s); 1210 init_ide_data (); 1211 1212#ifdef CONFIG_BLK_DEV_IDEDOUBLER 1213 if (!strcmp(s, "ide=doubler")) { 1214 extern int ide_doubler; 1215 1216 printk(" : Enabled support for IDE doublers\n"); 1217 ide_doubler = 1; 1218 return 1; 1219 } 1220#endif /* CONFIG_BLK_DEV_IDEDOUBLER */ 1221 1222 if (!strcmp(s, "ide=nodma")) { 1223 printk(" : Prevented DMA\n"); 1224 noautodma = 1; 1225 goto obsolete_option; 1226 } 1227 1228#ifdef CONFIG_IDEPCI_PCIBUS_ORDER 1229 if (!strcmp(s, "ide=reverse")) { 1230 ide_scan_direction = 1; 1231 printk(" : Enabled support for IDE inverse scan order.\n"); 1232 return 1; 1233 } 1234#endif 1235 1236#ifdef CONFIG_BLK_DEV_IDEACPI 1237 if (!strcmp(s, "ide=noacpi")) { 1238 //printk(" : Disable IDE ACPI support.\n"); 1239 ide_noacpi = 1; 1240 return 1; 1241 } 1242 if (!strcmp(s, "ide=acpigtf")) { 1243 //printk(" : Enable IDE ACPI _GTF support.\n"); 1244 ide_noacpitfs = 0; 1245 return 1; 1246 } 1247 if (!strcmp(s, "ide=acpionboot")) { 1248 //printk(" : Call IDE ACPI methods on boot.\n"); 1249 ide_noacpionboot = 0; 1250 return 1; 1251 } 1252#endif /* CONFIG_BLK_DEV_IDEACPI */ 1253 1254 /* 1255 * Look for drive options: "hdx=" 1256 */ 1257 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) { 1258 const char *hd_words[] = { 1259 "none", "noprobe", "nowerr", "cdrom", "nodma", 1260 "autotune", "noautotune", "-8", "-9", "-10", 1261 "noflush", "remap", "remap63", "scsi", NULL }; 1262 unit = s[2] - 'a'; 1263 hw = unit / MAX_DRIVES; 1264 unit = unit % MAX_DRIVES; 1265 hwif = &ide_hwifs[hw]; 1266 drive = &hwif->drives[unit]; 1267 if (strncmp(s + 4, "ide-", 4) == 0) { 1268 strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req)); 1269 goto done; 1270 } 1271 switch (match_parm(&s[3], hd_words, vals, 3)) { 1272 case -1: /* "none" */ 1273 case -2: /* "noprobe" */ 1274 drive->noprobe = 1; 1275 goto done; 1276 case -3: /* "nowerr" */ 1277 drive->bad_wstat = BAD_R_STAT; 1278 hwif->noprobe = 0; 1279 goto done; 1280 case -4: /* "cdrom" */ 1281 drive->present = 1; 1282 drive->media = ide_cdrom; 1283 /* an ATAPI device ignores DRDY */ 1284 drive->ready_stat = 0; 1285 hwif->noprobe = 0; 1286 goto done; 1287 case -5: /* nodma */ 1288 drive->nodma = 1; 1289 goto done; 1290 case -6: /* "autotune" */ 1291 drive->autotune = IDE_TUNE_AUTO; 1292 goto obsolete_option; 1293 case -7: /* "noautotune" */ 1294 drive->autotune = IDE_TUNE_NOAUTO; 1295 goto obsolete_option; 1296 case -11: /* noflush */ 1297 drive->noflush = 1; 1298 goto done; 1299 case -12: /* "remap" */ 1300 drive->remap_0_to_1 = 1; 1301 goto done; 1302 case -13: /* "remap63" */ 1303 drive->sect0 = 63; 1304 goto done; 1305 case -14: /* "scsi" */ 1306 drive->scsi = 1; 1307 goto done; 1308 case 3: /* cyl,head,sect */ 1309 drive->media = ide_disk; 1310 drive->ready_stat = READY_STAT; 1311 drive->cyl = drive->bios_cyl = vals[0]; 1312 drive->head = drive->bios_head = vals[1]; 1313 drive->sect = drive->bios_sect = vals[2]; 1314 drive->present = 1; 1315 drive->forced_geom = 1; 1316 hwif->noprobe = 0; 1317 goto done; 1318 default: 1319 goto bad_option; 1320 } 1321 } 1322 1323 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e') 1324 goto bad_option; 1325 /* 1326 * Look for bus speed option: "idebus=" 1327 */ 1328 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') { 1329 if (match_parm(&s[6], NULL, vals, 1) != 1) 1330 goto bad_option; 1331 if (vals[0] >= 20 && vals[0] <= 66) { 1332 idebus_parameter = vals[0]; 1333 } else 1334 printk(" -- BAD BUS SPEED! Expected value from 20 to 66"); 1335 goto done; 1336 } 1337 /* 1338 * Look for interface options: "idex=" 1339 */ 1340 if (s[3] >= '0' && s[3] <= max_hwif) { 1341 /* 1342 * Be VERY CAREFUL changing this: note hardcoded indexes below 1343 * (-8, -9, -10) are reserved to ease the hardcoding. 1344 */ 1345 static const char *ide_words[] = { 1346 "noprobe", "serialize", "minus3", "minus4", 1347 "reset", "minus6", "ata66", "minus8", "minus9", 1348 "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb", 1349 "dtc2278", "umc8672", "ali14xx", NULL }; 1350 1351 hw_regs_t hwregs; 1352 1353 hw = s[3] - '0'; 1354 hwif = &ide_hwifs[hw]; 1355 i = match_parm(&s[4], ide_words, vals, 3); 1356 1357 /* 1358 * Cryptic check to ensure chipset not already set for hwif. 1359 * Note: we can't depend on hwif->chipset here. 1360 */ 1361 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) { 1362 /* chipset already specified */ 1363 if (is_chipset_set[hw]) 1364 goto bad_option; 1365 if (i > -18 && i <= -11) { 1366 /* these drivers are for "ide0=" only */ 1367 if (hw != 0) 1368 goto bad_hwif; 1369 /* chipset already specified for 2nd port */ 1370 if (is_chipset_set[hw+1]) 1371 goto bad_option; 1372 } 1373 is_chipset_set[hw] = 1; 1374 printk("\n"); 1375 } 1376 1377 switch (i) { 1378#ifdef CONFIG_BLK_DEV_ALI14XX 1379 case -17: /* "ali14xx" */ 1380 probe_ali14xx = 1; 1381 goto done; 1382#endif 1383#ifdef CONFIG_BLK_DEV_UMC8672 1384 case -16: /* "umc8672" */ 1385 probe_umc8672 = 1; 1386 goto done; 1387#endif 1388#ifdef CONFIG_BLK_DEV_DTC2278 1389 case -15: /* "dtc2278" */ 1390 probe_dtc2278 = 1; 1391 goto done; 1392#endif 1393#ifdef CONFIG_BLK_DEV_CMD640 1394 case -14: /* "cmd640_vlb" */ 1395 cmd640_vlb = 1; 1396 goto done; 1397#endif 1398#ifdef CONFIG_BLK_DEV_HT6560B 1399 case -13: /* "ht6560b" */ 1400 probe_ht6560b = 1; 1401 goto done; 1402#endif 1403#ifdef CONFIG_BLK_DEV_QD65XX 1404 case -12: /* "qd65xx" */ 1405 probe_qd65xx = 1; 1406 goto done; 1407#endif 1408#ifdef CONFIG_BLK_DEV_4DRIVES 1409 case -11: /* "four" drives on one set of ports */ 1410 { 1411 ide_hwif_t *mate = &ide_hwifs[hw^1]; 1412 mate->drives[0].select.all ^= 0x20; 1413 mate->drives[1].select.all ^= 0x20; 1414 hwif->chipset = mate->chipset = ide_4drives; 1415 mate->irq = hwif->irq; 1416 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports)); 1417 hwif->mate = mate; 1418 mate->mate = hwif; 1419 hwif->serialized = mate->serialized = 1; 1420 goto obsolete_option; 1421 } 1422#endif /* CONFIG_BLK_DEV_4DRIVES */ 1423 case -10: /* minus10 */ 1424 case -9: /* minus9 */ 1425 case -8: /* minus8 */ 1426 case -6: 1427 case -4: 1428 case -3: 1429 goto bad_option; 1430 case -7: /* ata66 */ 1431#ifdef CONFIG_BLK_DEV_IDEPCI 1432 /* 1433 * Use ATA_CBL_PATA40_SHORT so drive side 1434 * cable detection is also overriden. 1435 */ 1436 hwif->cbl = ATA_CBL_PATA40_SHORT; 1437 goto obsolete_option; 1438#else 1439 goto bad_hwif; 1440#endif 1441 case -5: /* "reset" */ 1442 hwif->reset = 1; 1443 goto obsolete_option; 1444 case -2: /* "serialize" */ 1445 hwif->mate = &ide_hwifs[hw^1]; 1446 hwif->mate->mate = hwif; 1447 hwif->serialized = hwif->mate->serialized = 1; 1448 goto obsolete_option; 1449 1450 case -1: /* "noprobe" */ 1451 hwif->noprobe = 1; 1452 goto done; 1453 1454 case 1: /* base */ 1455 vals[1] = vals[0] + 0x206; /* default ctl */ 1456 case 2: /* base,ctl */ 1457 vals[2] = 0; /* default irq = probe for it */ 1458 case 3: /* base,ctl,irq */ 1459 memset(&hwregs, 0, sizeof(hwregs)); 1460 ide_init_hwif_ports(&hwregs, vals[0], vals[1], &hwif->irq); 1461 memcpy(hwif->io_ports, hwregs.io_ports, sizeof(hwif->io_ports)); 1462 hwif->irq = vals[2]; 1463 hwif->noprobe = 0; 1464 hwif->chipset = ide_forced; 1465 goto obsolete_option; 1466 1467 case 0: goto bad_option; 1468 default: 1469 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n"); 1470 return 1; 1471 } 1472 } 1473bad_option: 1474 printk(" -- BAD OPTION\n"); 1475 return 1; 1476obsolete_option: 1477 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n"); 1478 return 1; 1479bad_hwif: 1480 printk("-- NOT SUPPORTED ON ide%d", hw); 1481done: 1482 printk("\n"); 1483 return 1; 1484} 1485 1486EXPORT_SYMBOL(ide_lock); 1487 1488static int ide_bus_match(struct device *dev, struct device_driver *drv) 1489{ 1490 return 1; 1491} 1492 1493static char *media_string(ide_drive_t *drive) 1494{ 1495 switch (drive->media) { 1496 case ide_disk: 1497 return "disk"; 1498 case ide_cdrom: 1499 return "cdrom"; 1500 case ide_tape: 1501 return "tape"; 1502 case ide_floppy: 1503 return "floppy"; 1504 case ide_optical: 1505 return "optical"; 1506 default: 1507 return "UNKNOWN"; 1508 } 1509} 1510 1511static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf) 1512{ 1513 ide_drive_t *drive = to_ide_device(dev); 1514 return sprintf(buf, "%s\n", media_string(drive)); 1515} 1516 1517static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf) 1518{ 1519 ide_drive_t *drive = to_ide_device(dev); 1520 return sprintf(buf, "%s\n", drive->name); 1521} 1522 1523static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) 1524{ 1525 ide_drive_t *drive = to_ide_device(dev); 1526 return sprintf(buf, "ide:m-%s\n", media_string(drive)); 1527} 1528 1529static ssize_t model_show(struct device *dev, struct device_attribute *attr, 1530 char *buf) 1531{ 1532 ide_drive_t *drive = to_ide_device(dev); 1533 return sprintf(buf, "%s\n", drive->id->model); 1534} 1535 1536static ssize_t firmware_show(struct device *dev, struct device_attribute *attr, 1537 char *buf) 1538{ 1539 ide_drive_t *drive = to_ide_device(dev); 1540 return sprintf(buf, "%s\n", drive->id->fw_rev); 1541} 1542 1543static ssize_t serial_show(struct device *dev, struct device_attribute *attr, 1544 char *buf) 1545{ 1546 ide_drive_t *drive = to_ide_device(dev); 1547 return sprintf(buf, "%s\n", drive->id->serial_no); 1548} 1549 1550static struct device_attribute ide_dev_attrs[] = { 1551 __ATTR_RO(media), 1552 __ATTR_RO(drivename), 1553 __ATTR_RO(modalias), 1554 __ATTR_RO(model), 1555 __ATTR_RO(firmware), 1556 __ATTR(serial, 0400, serial_show, NULL), 1557 __ATTR_NULL 1558}; 1559 1560static int ide_uevent(struct device *dev, struct kobj_uevent_env *env) 1561{ 1562 ide_drive_t *drive = to_ide_device(dev); 1563 1564 add_uevent_var(env, "MEDIA=%s", media_string(drive)); 1565 add_uevent_var(env, "DRIVENAME=%s", drive->name); 1566 add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive)); 1567 return 0; 1568} 1569 1570static int generic_ide_probe(struct device *dev) 1571{ 1572 ide_drive_t *drive = to_ide_device(dev); 1573 ide_driver_t *drv = to_ide_driver(dev->driver); 1574 1575 return drv->probe ? drv->probe(drive) : -ENODEV; 1576} 1577 1578static int generic_ide_remove(struct device *dev) 1579{ 1580 ide_drive_t *drive = to_ide_device(dev); 1581 ide_driver_t *drv = to_ide_driver(dev->driver); 1582 1583 if (drv->remove) 1584 drv->remove(drive); 1585 1586 return 0; 1587} 1588 1589static void generic_ide_shutdown(struct device *dev) 1590{ 1591 ide_drive_t *drive = to_ide_device(dev); 1592 ide_driver_t *drv = to_ide_driver(dev->driver); 1593 1594 if (dev->driver && drv->shutdown) 1595 drv->shutdown(drive); 1596} 1597 1598struct bus_type ide_bus_type = { 1599 .name = "ide", 1600 .match = ide_bus_match, 1601 .uevent = ide_uevent, 1602 .probe = generic_ide_probe, 1603 .remove = generic_ide_remove, 1604 .shutdown = generic_ide_shutdown, 1605 .dev_attrs = ide_dev_attrs, 1606 .suspend = generic_ide_suspend, 1607 .resume = generic_ide_resume, 1608}; 1609 1610EXPORT_SYMBOL_GPL(ide_bus_type); 1611 1612/* 1613 * This is gets invoked once during initialization, to set *everything* up 1614 */ 1615static int __init ide_init(void) 1616{ 1617 int ret; 1618 1619 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n"); 1620 system_bus_speed = ide_system_bus_speed(); 1621 1622 printk(KERN_INFO "ide: Assuming %dMHz system bus speed " 1623 "for PIO modes%s\n", system_bus_speed, 1624 idebus_parameter ? "" : "; override with idebus=xx"); 1625 1626 ret = bus_register(&ide_bus_type); 1627 if (ret < 0) { 1628 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret); 1629 return ret; 1630 } 1631 1632 init_ide_data(); 1633 1634 proc_ide_create(); 1635 1636 return 0; 1637} 1638 1639#ifdef MODULE 1640static char *options = NULL; 1641module_param(options, charp, 0); 1642MODULE_LICENSE("GPL"); 1643 1644static void __init parse_options (char *line) 1645{ 1646 char *next = line; 1647 1648 if (line == NULL || !*line) 1649 return; 1650 while ((line = next) != NULL) { 1651 if ((next = strchr(line,' ')) != NULL) 1652 *next++ = 0; 1653 if (!ide_setup(line)) 1654 printk (KERN_INFO "Unknown option '%s'\n", line); 1655 } 1656} 1657 1658int __init init_module (void) 1659{ 1660 parse_options(options); 1661 return ide_init(); 1662} 1663 1664void __exit cleanup_module (void) 1665{ 1666 int index; 1667 1668 for (index = 0; index < MAX_HWIFS; ++index) 1669 ide_unregister(index, 0, 0); 1670 1671 proc_ide_destroy(); 1672 1673 bus_unregister(&ide_bus_type); 1674} 1675 1676#else /* !MODULE */ 1677 1678__setup("", ide_setup); 1679 1680module_init(ide_init); 1681 1682#endif /* MODULE */ 1683