ide.c revision 2dde7861afa23cd59db83515cb0b810b92b220aa
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 108static void ide_port_init_devices_data(ide_hwif_t *); 109 110/* 111 * Do not even *think* about calling this! 112 */ 113void ide_init_port_data(ide_hwif_t *hwif, unsigned int index) 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); 133 134 ide_port_init_devices_data(hwif); 135} 136EXPORT_SYMBOL_GPL(ide_init_port_data); 137 138static void ide_port_init_devices_data(ide_hwif_t *hwif) 139{ 140 int unit; 141 142 for (unit = 0; unit < MAX_DRIVES; ++unit) { 143 ide_drive_t *drive = &hwif->drives[unit]; 144 u8 j = (hwif->index * MAX_DRIVES) + unit; 145 146 memset(drive, 0, sizeof(*drive)); 147 148 drive->media = ide_disk; 149 drive->select.all = (unit<<4)|0xa0; 150 drive->hwif = hwif; 151 drive->ctl = 0x08; 152 drive->ready_stat = READY_STAT; 153 drive->bad_wstat = BAD_W_STAT; 154 drive->special.b.recalibrate = 1; 155 drive->special.b.set_geometry = 1; 156 drive->name[0] = 'h'; 157 drive->name[1] = 'd'; 158 drive->name[2] = 'a' + j; 159 drive->max_failures = IDE_DEFAULT_MAX_FAILURES; 160 161 INIT_LIST_HEAD(&drive->list); 162 init_completion(&drive->gendev_rel_comp); 163 } 164} 165 166 167static void init_hwif_default(ide_hwif_t *hwif, unsigned int index) 168{ 169 hw_regs_t hw; 170 171 memset(&hw, 0, sizeof(hw_regs_t)); 172 173 ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq); 174 175 memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports)); 176 177 hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET]; 178#ifdef CONFIG_BLK_DEV_HD 179 if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA) 180 hwif->noprobe = 1; /* may be overridden by ide_setup() */ 181#endif 182} 183 184/* 185 * init_ide_data() sets reasonable default values into all fields 186 * of all instances of the hwifs and drives, but only on the first call. 187 * Subsequent calls have no effect (they don't wipe out anything). 188 * 189 * This routine is normally called at driver initialization time, 190 * but may also be called MUCH earlier during kernel "command-line" 191 * parameter processing. As such, we cannot depend on any other parts 192 * of the kernel (such as memory allocation) to be functioning yet. 193 * 194 * This is too bad, as otherwise we could dynamically allocate the 195 * ide_drive_t structs as needed, rather than always consuming memory 196 * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them. 197 * 198 * FIXME: We should stuff the setup data into __init and copy the 199 * relevant hwifs/allocate them properly during boot. 200 */ 201#define MAGIC_COOKIE 0x12345678 202static void __init init_ide_data (void) 203{ 204 ide_hwif_t *hwif; 205 unsigned int index; 206 static unsigned long magic_cookie = MAGIC_COOKIE; 207 208 if (magic_cookie != MAGIC_COOKIE) 209 return; /* already initialized */ 210 magic_cookie = 0; 211 212 /* Initialise all interface structures */ 213 for (index = 0; index < MAX_HWIFS; ++index) { 214 hwif = &ide_hwifs[index]; 215 ide_init_port_data(hwif, index); 216 init_hwif_default(hwif, index); 217#if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI) 218 hwif->irq = 219 ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]); 220#endif 221 } 222} 223 224/** 225 * ide_system_bus_speed - guess bus speed 226 * 227 * ide_system_bus_speed() returns what we think is the system VESA/PCI 228 * bus speed (in MHz). This is used for calculating interface PIO timings. 229 * The default is 40 for known PCI systems, 50 otherwise. 230 * The "idebus=xx" parameter can be used to override this value. 231 * The actual value to be used is computed/displayed the first time 232 * through. Drivers should only use this as a last resort. 233 * 234 * Returns a guessed speed in MHz. 235 */ 236 237static int ide_system_bus_speed(void) 238{ 239#ifdef CONFIG_PCI 240 static struct pci_device_id pci_default[] = { 241 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) }, 242 { } 243 }; 244#else 245#define pci_default 0 246#endif /* CONFIG_PCI */ 247 248 /* user supplied value */ 249 if (idebus_parameter) 250 return idebus_parameter; 251 252 /* safe default value for PCI or VESA and PCI*/ 253 return pci_dev_present(pci_default) ? 33 : 50; 254} 255 256ide_hwif_t * ide_find_port(unsigned long base) 257{ 258 ide_hwif_t *hwif; 259 int i; 260 261 for (i = 0; i < MAX_HWIFS; i++) { 262 hwif = &ide_hwifs[i]; 263 if (hwif->io_ports[IDE_DATA_OFFSET] == base) 264 goto found; 265 } 266 267 for (i = 0; i < MAX_HWIFS; i++) { 268 hwif = &ide_hwifs[i]; 269 if (hwif->chipset == ide_unknown) 270 goto found; 271 } 272 273 hwif = NULL; 274found: 275 return hwif; 276} 277 278EXPORT_SYMBOL_GPL(ide_find_port); 279 280static struct resource* hwif_request_region(ide_hwif_t *hwif, 281 unsigned long addr, int num) 282{ 283 struct resource *res = request_region(addr, num, hwif->name); 284 285 if (!res) 286 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n", 287 hwif->name, addr, addr+num-1); 288 return res; 289} 290 291/** 292 * ide_hwif_request_regions - request resources for IDE 293 * @hwif: interface to use 294 * 295 * Requests all the needed resources for an interface. 296 * Right now core IDE code does this work which is deeply wrong. 297 * MMIO leaves it to the controller driver, 298 * PIO will migrate this way over time. 299 */ 300 301int ide_hwif_request_regions(ide_hwif_t *hwif) 302{ 303 unsigned long addr; 304 unsigned int i; 305 306 if (hwif->mmio) 307 return 0; 308 addr = hwif->io_ports[IDE_CONTROL_OFFSET]; 309 if (addr && !hwif_request_region(hwif, addr, 1)) 310 goto control_region_busy; 311 hwif->straight8 = 0; 312 addr = hwif->io_ports[IDE_DATA_OFFSET]; 313 if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) { 314 if (!hwif_request_region(hwif, addr, 8)) 315 goto data_region_busy; 316 hwif->straight8 = 1; 317 return 0; 318 } 319 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) { 320 addr = hwif->io_ports[i]; 321 if (!hwif_request_region(hwif, addr, 1)) { 322 while (--i) 323 release_region(addr, 1); 324 goto data_region_busy; 325 } 326 } 327 return 0; 328 329data_region_busy: 330 addr = hwif->io_ports[IDE_CONTROL_OFFSET]; 331 if (addr) 332 release_region(addr, 1); 333control_region_busy: 334 /* If any errors are return, we drop the hwif interface. */ 335 return -EBUSY; 336} 337 338/** 339 * ide_hwif_release_regions - free IDE resources 340 * 341 * Note that we only release the standard ports, 342 * and do not even try to handle any extra ports 343 * allocated for weird IDE interface chipsets. 344 * 345 * Note also that we don't yet handle mmio resources here. More 346 * importantly our caller should be doing this so we need to 347 * restructure this as a helper function for drivers. 348 */ 349 350void ide_hwif_release_regions(ide_hwif_t *hwif) 351{ 352 u32 i = 0; 353 354 if (hwif->mmio) 355 return; 356 if (hwif->io_ports[IDE_CONTROL_OFFSET]) 357 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1); 358 if (hwif->straight8) { 359 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8); 360 return; 361 } 362 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) 363 if (hwif->io_ports[i]) 364 release_region(hwif->io_ports[i], 1); 365} 366 367/** 368 * ide_hwif_restore - restore hwif to template 369 * @hwif: hwif to update 370 * @tmp_hwif: template 371 * 372 * Restore hwif to a previous state by copying most settings 373 * from the template. 374 */ 375 376static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif) 377{ 378 hwif->hwgroup = tmp_hwif->hwgroup; 379 380 hwif->gendev.parent = tmp_hwif->gendev.parent; 381 382 hwif->proc = tmp_hwif->proc; 383 384 hwif->major = tmp_hwif->major; 385 hwif->straight8 = tmp_hwif->straight8; 386 hwif->bus_state = tmp_hwif->bus_state; 387 388 hwif->host_flags = tmp_hwif->host_flags; 389 390 hwif->pio_mask = tmp_hwif->pio_mask; 391 392 hwif->ultra_mask = tmp_hwif->ultra_mask; 393 hwif->mwdma_mask = tmp_hwif->mwdma_mask; 394 hwif->swdma_mask = tmp_hwif->swdma_mask; 395 396 hwif->cbl = tmp_hwif->cbl; 397 398 hwif->chipset = tmp_hwif->chipset; 399 hwif->hold = tmp_hwif->hold; 400 401 hwif->dev = tmp_hwif->dev; 402 403#ifdef CONFIG_BLK_DEV_IDEPCI 404 hwif->cds = tmp_hwif->cds; 405#endif 406 407 hwif->set_pio_mode = tmp_hwif->set_pio_mode; 408 hwif->set_dma_mode = tmp_hwif->set_dma_mode; 409 hwif->mdma_filter = tmp_hwif->mdma_filter; 410 hwif->udma_filter = tmp_hwif->udma_filter; 411 hwif->selectproc = tmp_hwif->selectproc; 412 hwif->reset_poll = tmp_hwif->reset_poll; 413 hwif->pre_reset = tmp_hwif->pre_reset; 414 hwif->resetproc = tmp_hwif->resetproc; 415 hwif->maskproc = tmp_hwif->maskproc; 416 hwif->quirkproc = tmp_hwif->quirkproc; 417 hwif->busproc = tmp_hwif->busproc; 418 419 hwif->ata_input_data = tmp_hwif->ata_input_data; 420 hwif->ata_output_data = tmp_hwif->ata_output_data; 421 hwif->atapi_input_bytes = tmp_hwif->atapi_input_bytes; 422 hwif->atapi_output_bytes = tmp_hwif->atapi_output_bytes; 423 424 hwif->dma_host_set = tmp_hwif->dma_host_set; 425 hwif->dma_setup = tmp_hwif->dma_setup; 426 hwif->dma_exec_cmd = tmp_hwif->dma_exec_cmd; 427 hwif->dma_start = tmp_hwif->dma_start; 428 hwif->ide_dma_end = tmp_hwif->ide_dma_end; 429 hwif->ide_dma_test_irq = tmp_hwif->ide_dma_test_irq; 430 hwif->ide_dma_clear_irq = tmp_hwif->ide_dma_clear_irq; 431 hwif->dma_lost_irq = tmp_hwif->dma_lost_irq; 432 hwif->dma_timeout = tmp_hwif->dma_timeout; 433 434 hwif->OUTB = tmp_hwif->OUTB; 435 hwif->OUTBSYNC = tmp_hwif->OUTBSYNC; 436 hwif->OUTW = tmp_hwif->OUTW; 437 hwif->OUTSW = tmp_hwif->OUTSW; 438 hwif->OUTSL = tmp_hwif->OUTSL; 439 440 hwif->INB = tmp_hwif->INB; 441 hwif->INW = tmp_hwif->INW; 442 hwif->INSW = tmp_hwif->INSW; 443 hwif->INSL = tmp_hwif->INSL; 444 445 hwif->sg_max_nents = tmp_hwif->sg_max_nents; 446 447 hwif->mmio = tmp_hwif->mmio; 448 hwif->rqsize = tmp_hwif->rqsize; 449 450#ifndef CONFIG_BLK_DEV_IDECS 451 hwif->irq = tmp_hwif->irq; 452#endif 453 454 hwif->dma_base = tmp_hwif->dma_base; 455 hwif->dma_command = tmp_hwif->dma_command; 456 hwif->dma_vendor1 = tmp_hwif->dma_vendor1; 457 hwif->dma_status = tmp_hwif->dma_status; 458 hwif->dma_vendor3 = tmp_hwif->dma_vendor3; 459 hwif->dma_prdtable = tmp_hwif->dma_prdtable; 460 461 hwif->config_data = tmp_hwif->config_data; 462 hwif->select_data = tmp_hwif->select_data; 463 hwif->extra_base = tmp_hwif->extra_base; 464 hwif->extra_ports = tmp_hwif->extra_ports; 465 466 hwif->hwif_data = tmp_hwif->hwif_data; 467} 468 469void ide_remove_port_from_hwgroup(ide_hwif_t *hwif) 470{ 471 ide_hwgroup_t *hwgroup = hwif->hwgroup; 472 473 spin_lock_irq(&ide_lock); 474 /* 475 * Remove us from the hwgroup, and free 476 * the hwgroup if we were the only member 477 */ 478 if (hwif->next == hwif) { 479 BUG_ON(hwgroup->hwif != hwif); 480 kfree(hwgroup); 481 } else { 482 /* There is another interface in hwgroup. 483 * Unlink us, and set hwgroup->drive and ->hwif to 484 * something sane. 485 */ 486 ide_hwif_t *g = hwgroup->hwif; 487 488 while (g->next != hwif) 489 g = g->next; 490 g->next = hwif->next; 491 if (hwgroup->hwif == hwif) { 492 /* Chose a random hwif for hwgroup->hwif. 493 * It's guaranteed that there are no drives 494 * left in the hwgroup. 495 */ 496 BUG_ON(hwgroup->drive != NULL); 497 hwgroup->hwif = g; 498 } 499 BUG_ON(hwgroup->hwif == hwif); 500 } 501 spin_unlock_irq(&ide_lock); 502} 503 504/* Called with ide_lock held. */ 505static void __ide_port_unregister_devices(ide_hwif_t *hwif) 506{ 507 int i; 508 509 for (i = 0; i < MAX_DRIVES; i++) { 510 ide_drive_t *drive = &hwif->drives[i]; 511 512 if (drive->present) { 513 spin_unlock_irq(&ide_lock); 514 device_unregister(&drive->gendev); 515 wait_for_completion(&drive->gendev_rel_comp); 516 spin_lock_irq(&ide_lock); 517 } 518 } 519} 520 521void ide_port_unregister_devices(ide_hwif_t *hwif) 522{ 523 mutex_lock(&ide_cfg_mtx); 524 spin_lock_irq(&ide_lock); 525 __ide_port_unregister_devices(hwif); 526 hwif->present = 0; 527 ide_port_init_devices_data(hwif); 528 spin_unlock_irq(&ide_lock); 529 mutex_unlock(&ide_cfg_mtx); 530} 531EXPORT_SYMBOL_GPL(ide_port_unregister_devices); 532 533/** 534 * ide_unregister - free an IDE interface 535 * @index: index of interface (will change soon to a pointer) 536 * @init_default: init default hwif flag 537 * @restore: restore hwif flag 538 * 539 * Perform the final unregister of an IDE interface. At the moment 540 * we don't refcount interfaces so this will also get split up. 541 * 542 * Locking: 543 * The caller must not hold the IDE locks 544 * The drive present/vanishing is not yet properly locked 545 * Take care with the callbacks. These have been split to avoid 546 * deadlocking the IDE layer. The shutdown callback is called 547 * before we take the lock and free resources. It is up to the 548 * caller to be sure there is no pending I/O here, and that 549 * the interface will not be reopened (present/vanishing locking 550 * isn't yet done BTW). After we commit to the final kill we 551 * call the cleanup callback with the ide locks held. 552 * 553 * Unregister restores the hwif structures to the default state. 554 * This is raving bonkers. 555 */ 556 557void ide_unregister(unsigned int index, int init_default, int restore) 558{ 559 ide_hwif_t *hwif, *g; 560 static ide_hwif_t tmp_hwif; /* protected by ide_cfg_mtx */ 561 ide_hwgroup_t *hwgroup; 562 int irq_count = 0; 563 564 BUG_ON(index >= MAX_HWIFS); 565 566 BUG_ON(in_interrupt()); 567 BUG_ON(irqs_disabled()); 568 mutex_lock(&ide_cfg_mtx); 569 spin_lock_irq(&ide_lock); 570 hwif = &ide_hwifs[index]; 571 if (!hwif->present) 572 goto abort; 573 __ide_port_unregister_devices(hwif); 574 hwif->present = 0; 575 576 spin_unlock_irq(&ide_lock); 577 578 ide_proc_unregister_port(hwif); 579 580 hwgroup = hwif->hwgroup; 581 /* 582 * free the irq if we were the only hwif using it 583 */ 584 g = hwgroup->hwif; 585 do { 586 if (g->irq == hwif->irq) 587 ++irq_count; 588 g = g->next; 589 } while (g != hwgroup->hwif); 590 if (irq_count == 1) 591 free_irq(hwif->irq, hwgroup); 592 593 ide_remove_port_from_hwgroup(hwif); 594 595 device_unregister(&hwif->gendev); 596 wait_for_completion(&hwif->gendev_rel_comp); 597 598 /* 599 * Remove us from the kernel's knowledge 600 */ 601 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS); 602 kfree(hwif->sg_table); 603 unregister_blkdev(hwif->major, hwif->name); 604 spin_lock_irq(&ide_lock); 605 606 if (hwif->dma_base) { 607 (void) ide_release_dma(hwif); 608 609 hwif->dma_base = 0; 610 hwif->dma_command = 0; 611 hwif->dma_vendor1 = 0; 612 hwif->dma_status = 0; 613 hwif->dma_vendor3 = 0; 614 hwif->dma_prdtable = 0; 615 616 hwif->extra_base = 0; 617 hwif->extra_ports = 0; 618 } 619 620 ide_hwif_release_regions(hwif); 621 622 /* copy original settings */ 623 tmp_hwif = *hwif; 624 625 /* restore hwif data to pristine status */ 626 ide_init_port_data(hwif, index); 627 628 if (init_default) 629 init_hwif_default(hwif, index); 630 631 if (restore) 632 ide_hwif_restore(hwif, &tmp_hwif); 633 634abort: 635 spin_unlock_irq(&ide_lock); 636 mutex_unlock(&ide_cfg_mtx); 637} 638 639EXPORT_SYMBOL(ide_unregister); 640 641void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw) 642{ 643 memcpy(hwif->io_ports, hw->io_ports, sizeof(hwif->io_ports)); 644 hwif->irq = hw->irq; 645 hwif->noprobe = 0; 646 hwif->chipset = hw->chipset; 647 hwif->gendev.parent = hw->dev; 648 hwif->ack_intr = hw->ack_intr; 649} 650EXPORT_SYMBOL_GPL(ide_init_port_hw); 651 652/** 653 * ide_register_hw - register IDE interface 654 * @hw: hardware registers 655 * @quirkproc: quirkproc function 656 * @hwifp: pointer to returned hwif 657 * 658 * Register an IDE interface, specifying exactly the registers etc. 659 * 660 * Returns -1 on error. 661 */ 662 663static int ide_register_hw(hw_regs_t *hw, void (*quirkproc)(ide_drive_t *), 664 ide_hwif_t **hwifp) 665{ 666 int index, retry = 1; 667 ide_hwif_t *hwif; 668 u8 idx[4] = { 0xff, 0xff, 0xff, 0xff }; 669 670 do { 671 hwif = ide_find_port(hw->io_ports[IDE_DATA_OFFSET]); 672 if (hwif) 673 goto found; 674 for (index = 0; index < MAX_HWIFS; index++) 675 ide_unregister(index, 1, 1); 676 } while (retry--); 677 return -1; 678found: 679 index = hwif->index; 680 if (hwif->present) 681 ide_unregister(index, 0, 1); 682 else if (!hwif->hold) 683 ide_init_port_data(hwif, index); 684 685 ide_init_port_hw(hwif, hw); 686 hwif->quirkproc = quirkproc; 687 688 idx[0] = index; 689 690 ide_device_add(idx, NULL); 691 692 if (hwifp) 693 *hwifp = hwif; 694 695 return hwif->present ? index : -1; 696} 697 698/* 699 * Locks for IDE setting functionality 700 */ 701 702DEFINE_MUTEX(ide_setting_mtx); 703 704EXPORT_SYMBOL_GPL(ide_setting_mtx); 705 706/** 707 * ide_spin_wait_hwgroup - wait for group 708 * @drive: drive in the group 709 * 710 * Wait for an IDE device group to go non busy and then return 711 * holding the ide_lock which guards the hwgroup->busy status 712 * and right to use it. 713 */ 714 715int ide_spin_wait_hwgroup (ide_drive_t *drive) 716{ 717 ide_hwgroup_t *hwgroup = HWGROUP(drive); 718 unsigned long timeout = jiffies + (3 * HZ); 719 720 spin_lock_irq(&ide_lock); 721 722 while (hwgroup->busy) { 723 unsigned long lflags; 724 spin_unlock_irq(&ide_lock); 725 local_irq_set(lflags); 726 if (time_after(jiffies, timeout)) { 727 local_irq_restore(lflags); 728 printk(KERN_ERR "%s: channel busy\n", drive->name); 729 return -EBUSY; 730 } 731 local_irq_restore(lflags); 732 spin_lock_irq(&ide_lock); 733 } 734 return 0; 735} 736 737EXPORT_SYMBOL(ide_spin_wait_hwgroup); 738 739int set_io_32bit(ide_drive_t *drive, int arg) 740{ 741 if (drive->no_io_32bit) 742 return -EPERM; 743 744 if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1)) 745 return -EINVAL; 746 747 if (ide_spin_wait_hwgroup(drive)) 748 return -EBUSY; 749 750 drive->io_32bit = arg; 751 752 spin_unlock_irq(&ide_lock); 753 754 return 0; 755} 756 757static int set_ksettings(ide_drive_t *drive, int arg) 758{ 759 if (arg < 0 || arg > 1) 760 return -EINVAL; 761 762 if (ide_spin_wait_hwgroup(drive)) 763 return -EBUSY; 764 drive->keep_settings = arg; 765 spin_unlock_irq(&ide_lock); 766 767 return 0; 768} 769 770int set_using_dma(ide_drive_t *drive, int arg) 771{ 772#ifdef CONFIG_BLK_DEV_IDEDMA 773 ide_hwif_t *hwif = drive->hwif; 774 int err = -EPERM; 775 776 if (arg < 0 || arg > 1) 777 return -EINVAL; 778 779 if (!drive->id || !(drive->id->capability & 1)) 780 goto out; 781 782 if (hwif->dma_host_set == NULL) 783 goto out; 784 785 err = -EBUSY; 786 if (ide_spin_wait_hwgroup(drive)) 787 goto out; 788 /* 789 * set ->busy flag, unlock and let it ride 790 */ 791 hwif->hwgroup->busy = 1; 792 spin_unlock_irq(&ide_lock); 793 794 err = 0; 795 796 if (arg) { 797 if (ide_set_dma(drive)) 798 err = -EIO; 799 } else 800 ide_dma_off(drive); 801 802 /* 803 * lock, clear ->busy flag and unlock before leaving 804 */ 805 spin_lock_irq(&ide_lock); 806 hwif->hwgroup->busy = 0; 807 spin_unlock_irq(&ide_lock); 808out: 809 return err; 810#else 811 if (arg < 0 || arg > 1) 812 return -EINVAL; 813 814 return -EPERM; 815#endif 816} 817 818int set_pio_mode(ide_drive_t *drive, int arg) 819{ 820 struct request rq; 821 822 if (arg < 0 || arg > 255) 823 return -EINVAL; 824 825 if (drive->hwif->set_pio_mode == NULL) 826 return -ENOSYS; 827 828 if (drive->special.b.set_tune) 829 return -EBUSY; 830 831 ide_init_drive_cmd(&rq); 832 rq.cmd_type = REQ_TYPE_ATA_TASKFILE; 833 834 drive->tune_req = (u8) arg; 835 drive->special.b.set_tune = 1; 836 (void) ide_do_drive_cmd(drive, &rq, ide_wait); 837 return 0; 838} 839 840static int set_unmaskirq(ide_drive_t *drive, int arg) 841{ 842 if (drive->no_unmask) 843 return -EPERM; 844 845 if (arg < 0 || arg > 1) 846 return -EINVAL; 847 848 if (ide_spin_wait_hwgroup(drive)) 849 return -EBUSY; 850 drive->unmask = arg; 851 spin_unlock_irq(&ide_lock); 852 853 return 0; 854} 855 856/** 857 * system_bus_clock - clock guess 858 * 859 * External version of the bus clock guess used by very old IDE drivers 860 * for things like VLB timings. Should not be used. 861 */ 862 863int system_bus_clock (void) 864{ 865 return system_bus_speed; 866} 867 868EXPORT_SYMBOL(system_bus_clock); 869 870static int generic_ide_suspend(struct device *dev, pm_message_t mesg) 871{ 872 ide_drive_t *drive = dev->driver_data; 873 ide_hwif_t *hwif = HWIF(drive); 874 struct request rq; 875 struct request_pm_state rqpm; 876 ide_task_t args; 877 int ret; 878 879 /* Call ACPI _GTM only once */ 880 if (!(drive->dn % 2)) 881 ide_acpi_get_timing(hwif); 882 883 memset(&rq, 0, sizeof(rq)); 884 memset(&rqpm, 0, sizeof(rqpm)); 885 memset(&args, 0, sizeof(args)); 886 rq.cmd_type = REQ_TYPE_PM_SUSPEND; 887 rq.special = &args; 888 rq.data = &rqpm; 889 rqpm.pm_step = ide_pm_state_start_suspend; 890 if (mesg.event == PM_EVENT_PRETHAW) 891 mesg.event = PM_EVENT_FREEZE; 892 rqpm.pm_state = mesg.event; 893 894 ret = ide_do_drive_cmd(drive, &rq, ide_wait); 895 /* only call ACPI _PS3 after both drivers are suspended */ 896 if (!ret && (((drive->dn % 2) && hwif->drives[0].present 897 && hwif->drives[1].present) 898 || !hwif->drives[0].present 899 || !hwif->drives[1].present)) 900 ide_acpi_set_state(hwif, 0); 901 return ret; 902} 903 904static int generic_ide_resume(struct device *dev) 905{ 906 ide_drive_t *drive = dev->driver_data; 907 ide_hwif_t *hwif = HWIF(drive); 908 struct request rq; 909 struct request_pm_state rqpm; 910 ide_task_t args; 911 int err; 912 913 /* Call ACPI _STM only once */ 914 if (!(drive->dn % 2)) { 915 ide_acpi_set_state(hwif, 1); 916 ide_acpi_push_timing(hwif); 917 } 918 919 ide_acpi_exec_tfs(drive); 920 921 memset(&rq, 0, sizeof(rq)); 922 memset(&rqpm, 0, sizeof(rqpm)); 923 memset(&args, 0, sizeof(args)); 924 rq.cmd_type = REQ_TYPE_PM_RESUME; 925 rq.special = &args; 926 rq.data = &rqpm; 927 rqpm.pm_step = ide_pm_state_start_resume; 928 rqpm.pm_state = PM_EVENT_ON; 929 930 err = ide_do_drive_cmd(drive, &rq, ide_head_wait); 931 932 if (err == 0 && dev->driver) { 933 ide_driver_t *drv = to_ide_driver(dev->driver); 934 935 if (drv->resume) 936 drv->resume(drive); 937 } 938 939 return err; 940} 941 942int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev, 943 unsigned int cmd, unsigned long arg) 944{ 945 unsigned long flags; 946 ide_driver_t *drv; 947 void __user *p = (void __user *)arg; 948 int err = 0, (*setfunc)(ide_drive_t *, int); 949 u8 *val; 950 951 switch (cmd) { 952 case HDIO_GET_32BIT: val = &drive->io_32bit; goto read_val; 953 case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val; 954 case HDIO_GET_UNMASKINTR: val = &drive->unmask; goto read_val; 955 case HDIO_GET_DMA: val = &drive->using_dma; goto read_val; 956 case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val; 957 case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val; 958 case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val; 959 case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val; 960 case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val; 961 } 962 963 switch (cmd) { 964 case HDIO_OBSOLETE_IDENTITY: 965 case HDIO_GET_IDENTITY: 966 if (bdev != bdev->bd_contains) 967 return -EINVAL; 968 if (drive->id_read == 0) 969 return -ENOMSG; 970 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142)) 971 return -EFAULT; 972 return 0; 973 974 case HDIO_GET_NICE: 975 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP | 976 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP | 977 drive->nice1 << IDE_NICE_1, 978 (long __user *) arg); 979#ifdef CONFIG_IDE_TASK_IOCTL 980 case HDIO_DRIVE_TASKFILE: 981 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 982 return -EACCES; 983 switch(drive->media) { 984 case ide_disk: 985 return ide_taskfile_ioctl(drive, cmd, arg); 986 default: 987 return -ENOMSG; 988 } 989#endif /* CONFIG_IDE_TASK_IOCTL */ 990 991 case HDIO_DRIVE_CMD: 992 if (!capable(CAP_SYS_RAWIO)) 993 return -EACCES; 994 return ide_cmd_ioctl(drive, cmd, arg); 995 996 case HDIO_DRIVE_TASK: 997 if (!capable(CAP_SYS_RAWIO)) 998 return -EACCES; 999 return ide_task_ioctl(drive, cmd, arg); 1000 1001 case HDIO_SCAN_HWIF: 1002 { 1003 hw_regs_t hw; 1004 int args[3]; 1005 if (!capable(CAP_SYS_RAWIO)) return -EACCES; 1006 if (copy_from_user(args, p, 3 * sizeof(int))) 1007 return -EFAULT; 1008 memset(&hw, 0, sizeof(hw)); 1009 ide_init_hwif_ports(&hw, (unsigned long) args[0], 1010 (unsigned long) args[1], NULL); 1011 hw.irq = args[2]; 1012 if (ide_register_hw(&hw, NULL, NULL) == -1) 1013 return -EIO; 1014 return 0; 1015 } 1016 case HDIO_UNREGISTER_HWIF: 1017 if (!capable(CAP_SYS_RAWIO)) return -EACCES; 1018 /* (arg > MAX_HWIFS) checked in function */ 1019 ide_unregister(arg, 1, 1); 1020 return 0; 1021 case HDIO_SET_NICE: 1022 if (!capable(CAP_SYS_ADMIN)) return -EACCES; 1023 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1)))) 1024 return -EPERM; 1025 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1; 1026 drv = *(ide_driver_t **)bdev->bd_disk->private_data; 1027 if (drive->dsc_overlap && !drv->supports_dsc_overlap) { 1028 drive->dsc_overlap = 0; 1029 return -EPERM; 1030 } 1031 drive->nice1 = (arg >> IDE_NICE_1) & 1; 1032 return 0; 1033 case HDIO_DRIVE_RESET: 1034 if (!capable(CAP_SYS_ADMIN)) 1035 return -EACCES; 1036 1037 /* 1038 * Abort the current command on the 1039 * group if there is one, taking 1040 * care not to allow anything else 1041 * to be queued and to die on the 1042 * spot if we miss one somehow 1043 */ 1044 1045 spin_lock_irqsave(&ide_lock, flags); 1046 1047 if (HWGROUP(drive)->resetting) { 1048 spin_unlock_irqrestore(&ide_lock, flags); 1049 return -EBUSY; 1050 } 1051 1052 ide_abort(drive, "drive reset"); 1053 1054 BUG_ON(HWGROUP(drive)->handler); 1055 1056 /* Ensure nothing gets queued after we 1057 drop the lock. Reset will clear the busy */ 1058 1059 HWGROUP(drive)->busy = 1; 1060 spin_unlock_irqrestore(&ide_lock, flags); 1061 (void) ide_do_reset(drive); 1062 1063 return 0; 1064 case HDIO_GET_BUSSTATE: 1065 if (!capable(CAP_SYS_ADMIN)) 1066 return -EACCES; 1067 if (put_user(HWIF(drive)->bus_state, (long __user *)arg)) 1068 return -EFAULT; 1069 return 0; 1070 1071 case HDIO_SET_BUSSTATE: 1072 if (!capable(CAP_SYS_ADMIN)) 1073 return -EACCES; 1074 if (HWIF(drive)->busproc) 1075 return HWIF(drive)->busproc(drive, (int)arg); 1076 return -EOPNOTSUPP; 1077 default: 1078 return -EINVAL; 1079 } 1080 1081read_val: 1082 mutex_lock(&ide_setting_mtx); 1083 spin_lock_irqsave(&ide_lock, flags); 1084 err = *val; 1085 spin_unlock_irqrestore(&ide_lock, flags); 1086 mutex_unlock(&ide_setting_mtx); 1087 return err >= 0 ? put_user(err, (long __user *)arg) : err; 1088 1089set_val: 1090 if (bdev != bdev->bd_contains) 1091 err = -EINVAL; 1092 else { 1093 if (!capable(CAP_SYS_ADMIN)) 1094 err = -EACCES; 1095 else { 1096 mutex_lock(&ide_setting_mtx); 1097 err = setfunc(drive, arg); 1098 mutex_unlock(&ide_setting_mtx); 1099 } 1100 } 1101 return err; 1102} 1103 1104EXPORT_SYMBOL(generic_ide_ioctl); 1105 1106/* 1107 * stridx() returns the offset of c within s, 1108 * or -1 if c is '\0' or not found within s. 1109 */ 1110static int __init stridx (const char *s, char c) 1111{ 1112 char *i = strchr(s, c); 1113 return (i && c) ? i - s : -1; 1114} 1115 1116/* 1117 * match_parm() does parsing for ide_setup(): 1118 * 1119 * 1. the first char of s must be '='. 1120 * 2. if the remainder matches one of the supplied keywords, 1121 * the index (1 based) of the keyword is negated and returned. 1122 * 3. if the remainder is a series of no more than max_vals numbers 1123 * separated by commas, the numbers are saved in vals[] and a 1124 * count of how many were saved is returned. Base10 is assumed, 1125 * and base16 is allowed when prefixed with "0x". 1126 * 4. otherwise, zero is returned. 1127 */ 1128static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals) 1129{ 1130 static const char *decimal = "0123456789"; 1131 static const char *hex = "0123456789abcdef"; 1132 int i, n; 1133 1134 if (*s++ == '=') { 1135 /* 1136 * Try matching against the supplied keywords, 1137 * and return -(index+1) if we match one 1138 */ 1139 if (keywords != NULL) { 1140 for (i = 0; *keywords != NULL; ++i) { 1141 if (!strcmp(s, *keywords++)) 1142 return -(i+1); 1143 } 1144 } 1145 /* 1146 * Look for a series of no more than "max_vals" 1147 * numeric values separated by commas, in base10, 1148 * or base16 when prefixed with "0x". 1149 * Return a count of how many were found. 1150 */ 1151 for (n = 0; (i = stridx(decimal, *s)) >= 0;) { 1152 vals[n] = i; 1153 while ((i = stridx(decimal, *++s)) >= 0) 1154 vals[n] = (vals[n] * 10) + i; 1155 if (*s == 'x' && !vals[n]) { 1156 while ((i = stridx(hex, *++s)) >= 0) 1157 vals[n] = (vals[n] * 0x10) + i; 1158 } 1159 if (++n == max_vals) 1160 break; 1161 if (*s == ',' || *s == ';') 1162 ++s; 1163 } 1164 if (!*s) 1165 return n; 1166 } 1167 return 0; /* zero = nothing matched */ 1168} 1169 1170extern int probe_ali14xx; 1171extern int probe_umc8672; 1172extern int probe_dtc2278; 1173extern int probe_ht6560b; 1174extern int probe_qd65xx; 1175extern int cmd640_vlb; 1176 1177static int __initdata is_chipset_set[MAX_HWIFS]; 1178 1179/* 1180 * ide_setup() gets called VERY EARLY during initialization, 1181 * to handle kernel "command line" strings beginning with "hdx=" or "ide". 1182 * 1183 * Remember to update Documentation/ide/ide.txt if you change something here. 1184 */ 1185static int __init ide_setup(char *s) 1186{ 1187 int i, vals[3]; 1188 ide_hwif_t *hwif; 1189 ide_drive_t *drive; 1190 unsigned int hw, unit; 1191 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1); 1192 const char max_hwif = '0' + (MAX_HWIFS - 1); 1193 1194 1195 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */ 1196 return 0; /* driver and not us */ 1197 1198 if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2)) 1199 return 0; 1200 1201 printk(KERN_INFO "ide_setup: %s", s); 1202 init_ide_data (); 1203 1204#ifdef CONFIG_BLK_DEV_IDEDOUBLER 1205 if (!strcmp(s, "ide=doubler")) { 1206 extern int ide_doubler; 1207 1208 printk(" : Enabled support for IDE doublers\n"); 1209 ide_doubler = 1; 1210 return 1; 1211 } 1212#endif /* CONFIG_BLK_DEV_IDEDOUBLER */ 1213 1214 if (!strcmp(s, "ide=nodma")) { 1215 printk(" : Prevented DMA\n"); 1216 noautodma = 1; 1217 goto obsolete_option; 1218 } 1219 1220#ifdef CONFIG_BLK_DEV_IDEACPI 1221 if (!strcmp(s, "ide=noacpi")) { 1222 //printk(" : Disable IDE ACPI support.\n"); 1223 ide_noacpi = 1; 1224 return 1; 1225 } 1226 if (!strcmp(s, "ide=acpigtf")) { 1227 //printk(" : Enable IDE ACPI _GTF support.\n"); 1228 ide_noacpitfs = 0; 1229 return 1; 1230 } 1231 if (!strcmp(s, "ide=acpionboot")) { 1232 //printk(" : Call IDE ACPI methods on boot.\n"); 1233 ide_noacpionboot = 0; 1234 return 1; 1235 } 1236#endif /* CONFIG_BLK_DEV_IDEACPI */ 1237 1238 /* 1239 * Look for drive options: "hdx=" 1240 */ 1241 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) { 1242 const char *hd_words[] = { 1243 "none", "noprobe", "nowerr", "cdrom", "nodma", 1244 "autotune", "noautotune", "-8", "-9", "-10", 1245 "noflush", "remap", "remap63", "scsi", NULL }; 1246 unit = s[2] - 'a'; 1247 hw = unit / MAX_DRIVES; 1248 unit = unit % MAX_DRIVES; 1249 hwif = &ide_hwifs[hw]; 1250 drive = &hwif->drives[unit]; 1251 if (strncmp(s + 4, "ide-", 4) == 0) { 1252 strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req)); 1253 goto obsolete_option; 1254 } 1255 switch (match_parm(&s[3], hd_words, vals, 3)) { 1256 case -1: /* "none" */ 1257 case -2: /* "noprobe" */ 1258 drive->noprobe = 1; 1259 goto done; 1260 case -3: /* "nowerr" */ 1261 drive->bad_wstat = BAD_R_STAT; 1262 hwif->noprobe = 0; 1263 goto done; 1264 case -4: /* "cdrom" */ 1265 drive->present = 1; 1266 drive->media = ide_cdrom; 1267 /* an ATAPI device ignores DRDY */ 1268 drive->ready_stat = 0; 1269 hwif->noprobe = 0; 1270 goto done; 1271 case -5: /* nodma */ 1272 drive->nodma = 1; 1273 goto done; 1274 case -6: /* "autotune" */ 1275 drive->autotune = IDE_TUNE_AUTO; 1276 goto obsolete_option; 1277 case -7: /* "noautotune" */ 1278 drive->autotune = IDE_TUNE_NOAUTO; 1279 goto obsolete_option; 1280 case -11: /* noflush */ 1281 drive->noflush = 1; 1282 goto done; 1283 case -12: /* "remap" */ 1284 drive->remap_0_to_1 = 1; 1285 goto obsolete_option; 1286 case -13: /* "remap63" */ 1287 drive->sect0 = 63; 1288 goto obsolete_option; 1289 case -14: /* "scsi" */ 1290 drive->scsi = 1; 1291 goto obsolete_option; 1292 case 3: /* cyl,head,sect */ 1293 drive->media = ide_disk; 1294 drive->ready_stat = READY_STAT; 1295 drive->cyl = drive->bios_cyl = vals[0]; 1296 drive->head = drive->bios_head = vals[1]; 1297 drive->sect = drive->bios_sect = vals[2]; 1298 drive->present = 1; 1299 drive->forced_geom = 1; 1300 hwif->noprobe = 0; 1301 goto done; 1302 default: 1303 goto bad_option; 1304 } 1305 } 1306 1307 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e') 1308 goto bad_option; 1309 /* 1310 * Look for bus speed option: "idebus=" 1311 */ 1312 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') { 1313 if (match_parm(&s[6], NULL, vals, 1) != 1) 1314 goto bad_option; 1315 if (vals[0] >= 20 && vals[0] <= 66) { 1316 idebus_parameter = vals[0]; 1317 } else 1318 printk(" -- BAD BUS SPEED! Expected value from 20 to 66"); 1319 goto done; 1320 } 1321 /* 1322 * Look for interface options: "idex=" 1323 */ 1324 if (s[3] >= '0' && s[3] <= max_hwif) { 1325 /* 1326 * Be VERY CAREFUL changing this: note hardcoded indexes below 1327 * (-8, -9, -10) are reserved to ease the hardcoding. 1328 */ 1329 static const char *ide_words[] = { 1330 "noprobe", "serialize", "minus3", "minus4", 1331 "reset", "minus6", "ata66", "minus8", "minus9", 1332 "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb", 1333 "dtc2278", "umc8672", "ali14xx", NULL }; 1334 1335 hw_regs_t hwregs; 1336 1337 hw = s[3] - '0'; 1338 hwif = &ide_hwifs[hw]; 1339 i = match_parm(&s[4], ide_words, vals, 3); 1340 1341 /* 1342 * Cryptic check to ensure chipset not already set for hwif. 1343 * Note: we can't depend on hwif->chipset here. 1344 */ 1345 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) { 1346 /* chipset already specified */ 1347 if (is_chipset_set[hw]) 1348 goto bad_option; 1349 if (i > -18 && i <= -11) { 1350 /* these drivers are for "ide0=" only */ 1351 if (hw != 0) 1352 goto bad_hwif; 1353 /* chipset already specified for 2nd port */ 1354 if (is_chipset_set[hw+1]) 1355 goto bad_option; 1356 } 1357 is_chipset_set[hw] = 1; 1358 printk("\n"); 1359 } 1360 1361 switch (i) { 1362#ifdef CONFIG_BLK_DEV_ALI14XX 1363 case -17: /* "ali14xx" */ 1364 probe_ali14xx = 1; 1365 goto obsolete_option; 1366#endif 1367#ifdef CONFIG_BLK_DEV_UMC8672 1368 case -16: /* "umc8672" */ 1369 probe_umc8672 = 1; 1370 goto obsolete_option; 1371#endif 1372#ifdef CONFIG_BLK_DEV_DTC2278 1373 case -15: /* "dtc2278" */ 1374 probe_dtc2278 = 1; 1375 goto obsolete_option; 1376#endif 1377#ifdef CONFIG_BLK_DEV_CMD640 1378 case -14: /* "cmd640_vlb" */ 1379 cmd640_vlb = 1; 1380 goto obsolete_option; 1381#endif 1382#ifdef CONFIG_BLK_DEV_HT6560B 1383 case -13: /* "ht6560b" */ 1384 probe_ht6560b = 1; 1385 goto obsolete_option; 1386#endif 1387#ifdef CONFIG_BLK_DEV_QD65XX 1388 case -12: /* "qd65xx" */ 1389 probe_qd65xx = 1; 1390 goto obsolete_option; 1391#endif 1392#ifdef CONFIG_BLK_DEV_4DRIVES 1393 case -11: /* "four" drives on one set of ports */ 1394 { 1395 ide_hwif_t *mate = &ide_hwifs[hw^1]; 1396 mate->drives[0].select.all ^= 0x20; 1397 mate->drives[1].select.all ^= 0x20; 1398 hwif->chipset = mate->chipset = ide_4drives; 1399 mate->irq = hwif->irq; 1400 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports)); 1401 hwif->mate = mate; 1402 mate->mate = hwif; 1403 hwif->serialized = mate->serialized = 1; 1404 goto obsolete_option; 1405 } 1406#endif /* CONFIG_BLK_DEV_4DRIVES */ 1407 case -10: /* minus10 */ 1408 case -9: /* minus9 */ 1409 case -8: /* minus8 */ 1410 case -6: 1411 case -4: 1412 case -3: 1413 goto bad_option; 1414 case -7: /* ata66 */ 1415#ifdef CONFIG_BLK_DEV_IDEPCI 1416 /* 1417 * Use ATA_CBL_PATA40_SHORT so drive side 1418 * cable detection is also overriden. 1419 */ 1420 hwif->cbl = ATA_CBL_PATA40_SHORT; 1421 goto obsolete_option; 1422#else 1423 goto bad_hwif; 1424#endif 1425 case -5: /* "reset" */ 1426 hwif->reset = 1; 1427 goto obsolete_option; 1428 case -2: /* "serialize" */ 1429 hwif->mate = &ide_hwifs[hw^1]; 1430 hwif->mate->mate = hwif; 1431 hwif->serialized = hwif->mate->serialized = 1; 1432 goto obsolete_option; 1433 1434 case -1: /* "noprobe" */ 1435 hwif->noprobe = 1; 1436 goto obsolete_option; 1437 1438 case 1: /* base */ 1439 vals[1] = vals[0] + 0x206; /* default ctl */ 1440 case 2: /* base,ctl */ 1441 vals[2] = 0; /* default irq = probe for it */ 1442 case 3: /* base,ctl,irq */ 1443 memset(&hwregs, 0, sizeof(hwregs)); 1444 ide_init_hwif_ports(&hwregs, vals[0], vals[1], &hwif->irq); 1445 memcpy(hwif->io_ports, hwregs.io_ports, sizeof(hwif->io_ports)); 1446 hwif->irq = vals[2]; 1447 hwif->noprobe = 0; 1448 hwif->chipset = ide_forced; 1449 goto obsolete_option; 1450 1451 case 0: goto bad_option; 1452 default: 1453 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n"); 1454 return 1; 1455 } 1456 } 1457bad_option: 1458 printk(" -- BAD OPTION\n"); 1459 return 1; 1460obsolete_option: 1461 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n"); 1462 return 1; 1463bad_hwif: 1464 printk("-- NOT SUPPORTED ON ide%d", hw); 1465done: 1466 printk("\n"); 1467 return 1; 1468} 1469 1470EXPORT_SYMBOL(ide_lock); 1471 1472static int ide_bus_match(struct device *dev, struct device_driver *drv) 1473{ 1474 return 1; 1475} 1476 1477static char *media_string(ide_drive_t *drive) 1478{ 1479 switch (drive->media) { 1480 case ide_disk: 1481 return "disk"; 1482 case ide_cdrom: 1483 return "cdrom"; 1484 case ide_tape: 1485 return "tape"; 1486 case ide_floppy: 1487 return "floppy"; 1488 case ide_optical: 1489 return "optical"; 1490 default: 1491 return "UNKNOWN"; 1492 } 1493} 1494 1495static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf) 1496{ 1497 ide_drive_t *drive = to_ide_device(dev); 1498 return sprintf(buf, "%s\n", media_string(drive)); 1499} 1500 1501static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf) 1502{ 1503 ide_drive_t *drive = to_ide_device(dev); 1504 return sprintf(buf, "%s\n", drive->name); 1505} 1506 1507static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) 1508{ 1509 ide_drive_t *drive = to_ide_device(dev); 1510 return sprintf(buf, "ide:m-%s\n", media_string(drive)); 1511} 1512 1513static ssize_t model_show(struct device *dev, struct device_attribute *attr, 1514 char *buf) 1515{ 1516 ide_drive_t *drive = to_ide_device(dev); 1517 return sprintf(buf, "%s\n", drive->id->model); 1518} 1519 1520static ssize_t firmware_show(struct device *dev, struct device_attribute *attr, 1521 char *buf) 1522{ 1523 ide_drive_t *drive = to_ide_device(dev); 1524 return sprintf(buf, "%s\n", drive->id->fw_rev); 1525} 1526 1527static ssize_t serial_show(struct device *dev, struct device_attribute *attr, 1528 char *buf) 1529{ 1530 ide_drive_t *drive = to_ide_device(dev); 1531 return sprintf(buf, "%s\n", drive->id->serial_no); 1532} 1533 1534static struct device_attribute ide_dev_attrs[] = { 1535 __ATTR_RO(media), 1536 __ATTR_RO(drivename), 1537 __ATTR_RO(modalias), 1538 __ATTR_RO(model), 1539 __ATTR_RO(firmware), 1540 __ATTR(serial, 0400, serial_show, NULL), 1541 __ATTR_NULL 1542}; 1543 1544static int ide_uevent(struct device *dev, struct kobj_uevent_env *env) 1545{ 1546 ide_drive_t *drive = to_ide_device(dev); 1547 1548 add_uevent_var(env, "MEDIA=%s", media_string(drive)); 1549 add_uevent_var(env, "DRIVENAME=%s", drive->name); 1550 add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive)); 1551 return 0; 1552} 1553 1554static int generic_ide_probe(struct device *dev) 1555{ 1556 ide_drive_t *drive = to_ide_device(dev); 1557 ide_driver_t *drv = to_ide_driver(dev->driver); 1558 1559 return drv->probe ? drv->probe(drive) : -ENODEV; 1560} 1561 1562static int generic_ide_remove(struct device *dev) 1563{ 1564 ide_drive_t *drive = to_ide_device(dev); 1565 ide_driver_t *drv = to_ide_driver(dev->driver); 1566 1567 if (drv->remove) 1568 drv->remove(drive); 1569 1570 return 0; 1571} 1572 1573static void generic_ide_shutdown(struct device *dev) 1574{ 1575 ide_drive_t *drive = to_ide_device(dev); 1576 ide_driver_t *drv = to_ide_driver(dev->driver); 1577 1578 if (dev->driver && drv->shutdown) 1579 drv->shutdown(drive); 1580} 1581 1582struct bus_type ide_bus_type = { 1583 .name = "ide", 1584 .match = ide_bus_match, 1585 .uevent = ide_uevent, 1586 .probe = generic_ide_probe, 1587 .remove = generic_ide_remove, 1588 .shutdown = generic_ide_shutdown, 1589 .dev_attrs = ide_dev_attrs, 1590 .suspend = generic_ide_suspend, 1591 .resume = generic_ide_resume, 1592}; 1593 1594EXPORT_SYMBOL_GPL(ide_bus_type); 1595 1596/* 1597 * This is gets invoked once during initialization, to set *everything* up 1598 */ 1599static int __init ide_init(void) 1600{ 1601 int ret; 1602 1603 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n"); 1604 system_bus_speed = ide_system_bus_speed(); 1605 1606 printk(KERN_INFO "ide: Assuming %dMHz system bus speed " 1607 "for PIO modes%s\n", system_bus_speed, 1608 idebus_parameter ? "" : "; override with idebus=xx"); 1609 1610 ret = bus_register(&ide_bus_type); 1611 if (ret < 0) { 1612 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret); 1613 return ret; 1614 } 1615 1616 init_ide_data(); 1617 1618 proc_ide_create(); 1619 1620 return 0; 1621} 1622 1623#ifdef MODULE 1624static char *options = NULL; 1625module_param(options, charp, 0); 1626MODULE_LICENSE("GPL"); 1627 1628static void __init parse_options (char *line) 1629{ 1630 char *next = line; 1631 1632 if (line == NULL || !*line) 1633 return; 1634 while ((line = next) != NULL) { 1635 if ((next = strchr(line,' ')) != NULL) 1636 *next++ = 0; 1637 if (!ide_setup(line)) 1638 printk (KERN_INFO "Unknown option '%s'\n", line); 1639 } 1640} 1641 1642int __init init_module (void) 1643{ 1644 parse_options(options); 1645 return ide_init(); 1646} 1647 1648void __exit cleanup_module (void) 1649{ 1650 int index; 1651 1652 for (index = 0; index < MAX_HWIFS; ++index) 1653 ide_unregister(index, 0, 0); 1654 1655 proc_ide_destroy(); 1656 1657 bus_unregister(&ide_bus_type); 1658} 1659 1660#else /* !MODULE */ 1661 1662__setup("", ide_setup); 1663 1664module_init(ide_init); 1665 1666#endif /* MODULE */ 1667