ide.c revision 43514ed1ee6a2325692e173ea4eb41068bf72de0
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} 520 521/** 522 * ide_unregister - free an IDE interface 523 * @index: index of interface (will change soon to a pointer) 524 * @init_default: init default hwif flag 525 * @restore: restore hwif flag 526 * 527 * Perform the final unregister of an IDE interface. At the moment 528 * we don't refcount interfaces so this will also get split up. 529 * 530 * Locking: 531 * The caller must not hold the IDE locks 532 * The drive present/vanishing is not yet properly locked 533 * Take care with the callbacks. These have been split to avoid 534 * deadlocking the IDE layer. The shutdown callback is called 535 * before we take the lock and free resources. It is up to the 536 * caller to be sure there is no pending I/O here, and that 537 * the interface will not be reopened (present/vanishing locking 538 * isn't yet done BTW). After we commit to the final kill we 539 * call the cleanup callback with the ide locks held. 540 * 541 * Unregister restores the hwif structures to the default state. 542 * This is raving bonkers. 543 */ 544 545void ide_unregister(unsigned int index, int init_default, int restore) 546{ 547 ide_hwif_t *hwif, *g; 548 static ide_hwif_t tmp_hwif; /* protected by ide_cfg_mtx */ 549 ide_hwgroup_t *hwgroup; 550 int irq_count = 0; 551 552 BUG_ON(index >= MAX_HWIFS); 553 554 BUG_ON(in_interrupt()); 555 BUG_ON(irqs_disabled()); 556 mutex_lock(&ide_cfg_mtx); 557 spin_lock_irq(&ide_lock); 558 hwif = &ide_hwifs[index]; 559 if (!hwif->present) 560 goto abort; 561 ide_port_unregister_devices(hwif); 562 hwif->present = 0; 563 564 spin_unlock_irq(&ide_lock); 565 566 ide_proc_unregister_port(hwif); 567 568 hwgroup = hwif->hwgroup; 569 /* 570 * free the irq if we were the only hwif using it 571 */ 572 g = hwgroup->hwif; 573 do { 574 if (g->irq == hwif->irq) 575 ++irq_count; 576 g = g->next; 577 } while (g != hwgroup->hwif); 578 if (irq_count == 1) 579 free_irq(hwif->irq, hwgroup); 580 581 ide_remove_port_from_hwgroup(hwif); 582 583 device_unregister(&hwif->gendev); 584 wait_for_completion(&hwif->gendev_rel_comp); 585 586 /* 587 * Remove us from the kernel's knowledge 588 */ 589 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS); 590 kfree(hwif->sg_table); 591 unregister_blkdev(hwif->major, hwif->name); 592 spin_lock_irq(&ide_lock); 593 594 if (hwif->dma_base) { 595 (void) ide_release_dma(hwif); 596 597 hwif->dma_base = 0; 598 hwif->dma_command = 0; 599 hwif->dma_vendor1 = 0; 600 hwif->dma_status = 0; 601 hwif->dma_vendor3 = 0; 602 hwif->dma_prdtable = 0; 603 604 hwif->extra_base = 0; 605 hwif->extra_ports = 0; 606 } 607 608 ide_hwif_release_regions(hwif); 609 610 /* copy original settings */ 611 tmp_hwif = *hwif; 612 613 /* restore hwif data to pristine status */ 614 ide_init_port_data(hwif, index); 615 616 if (init_default) 617 init_hwif_default(hwif, index); 618 619 if (restore) 620 ide_hwif_restore(hwif, &tmp_hwif); 621 622abort: 623 spin_unlock_irq(&ide_lock); 624 mutex_unlock(&ide_cfg_mtx); 625} 626 627EXPORT_SYMBOL(ide_unregister); 628 629void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw) 630{ 631 memcpy(hwif->io_ports, hw->io_ports, sizeof(hwif->io_ports)); 632 hwif->irq = hw->irq; 633 hwif->noprobe = 0; 634 hwif->chipset = hw->chipset; 635 hwif->gendev.parent = hw->dev; 636 hwif->ack_intr = hw->ack_intr; 637} 638EXPORT_SYMBOL_GPL(ide_init_port_hw); 639 640/** 641 * ide_register_hw - register IDE interface 642 * @hw: hardware registers 643 * @quirkproc: quirkproc function 644 * @hwifp: pointer to returned hwif 645 * 646 * Register an IDE interface, specifying exactly the registers etc. 647 * 648 * Returns -1 on error. 649 */ 650 651int ide_register_hw(hw_regs_t *hw, void (*quirkproc)(ide_drive_t *), 652 ide_hwif_t **hwifp) 653{ 654 int index, retry = 1; 655 ide_hwif_t *hwif; 656 u8 idx[4] = { 0xff, 0xff, 0xff, 0xff }; 657 658 do { 659 hwif = ide_find_port(hw->io_ports[IDE_DATA_OFFSET]); 660 if (hwif) 661 goto found; 662 for (index = 0; index < MAX_HWIFS; index++) 663 ide_unregister(index, 1, 1); 664 } while (retry--); 665 return -1; 666found: 667 index = hwif->index; 668 if (hwif->present) 669 ide_unregister(index, 0, 1); 670 else if (!hwif->hold) 671 ide_init_port_data(hwif, index); 672 673 ide_init_port_hw(hwif, hw); 674 hwif->quirkproc = quirkproc; 675 676 idx[0] = index; 677 678 ide_device_add(idx, NULL); 679 680 if (hwifp) 681 *hwifp = hwif; 682 683 return hwif->present ? index : -1; 684} 685 686EXPORT_SYMBOL(ide_register_hw); 687 688/* 689 * Locks for IDE setting functionality 690 */ 691 692DEFINE_MUTEX(ide_setting_mtx); 693 694EXPORT_SYMBOL_GPL(ide_setting_mtx); 695 696/** 697 * ide_spin_wait_hwgroup - wait for group 698 * @drive: drive in the group 699 * 700 * Wait for an IDE device group to go non busy and then return 701 * holding the ide_lock which guards the hwgroup->busy status 702 * and right to use it. 703 */ 704 705int ide_spin_wait_hwgroup (ide_drive_t *drive) 706{ 707 ide_hwgroup_t *hwgroup = HWGROUP(drive); 708 unsigned long timeout = jiffies + (3 * HZ); 709 710 spin_lock_irq(&ide_lock); 711 712 while (hwgroup->busy) { 713 unsigned long lflags; 714 spin_unlock_irq(&ide_lock); 715 local_irq_set(lflags); 716 if (time_after(jiffies, timeout)) { 717 local_irq_restore(lflags); 718 printk(KERN_ERR "%s: channel busy\n", drive->name); 719 return -EBUSY; 720 } 721 local_irq_restore(lflags); 722 spin_lock_irq(&ide_lock); 723 } 724 return 0; 725} 726 727EXPORT_SYMBOL(ide_spin_wait_hwgroup); 728 729int set_io_32bit(ide_drive_t *drive, int arg) 730{ 731 if (drive->no_io_32bit) 732 return -EPERM; 733 734 if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1)) 735 return -EINVAL; 736 737 if (ide_spin_wait_hwgroup(drive)) 738 return -EBUSY; 739 740 drive->io_32bit = arg; 741 742 spin_unlock_irq(&ide_lock); 743 744 return 0; 745} 746 747static int set_ksettings(ide_drive_t *drive, int arg) 748{ 749 if (arg < 0 || arg > 1) 750 return -EINVAL; 751 752 if (ide_spin_wait_hwgroup(drive)) 753 return -EBUSY; 754 drive->keep_settings = arg; 755 spin_unlock_irq(&ide_lock); 756 757 return 0; 758} 759 760int set_using_dma(ide_drive_t *drive, int arg) 761{ 762#ifdef CONFIG_BLK_DEV_IDEDMA 763 ide_hwif_t *hwif = drive->hwif; 764 int err = -EPERM; 765 766 if (arg < 0 || arg > 1) 767 return -EINVAL; 768 769 if (!drive->id || !(drive->id->capability & 1)) 770 goto out; 771 772 if (hwif->dma_host_set == NULL) 773 goto out; 774 775 err = -EBUSY; 776 if (ide_spin_wait_hwgroup(drive)) 777 goto out; 778 /* 779 * set ->busy flag, unlock and let it ride 780 */ 781 hwif->hwgroup->busy = 1; 782 spin_unlock_irq(&ide_lock); 783 784 err = 0; 785 786 if (arg) { 787 if (ide_set_dma(drive)) 788 err = -EIO; 789 } else 790 ide_dma_off(drive); 791 792 /* 793 * lock, clear ->busy flag and unlock before leaving 794 */ 795 spin_lock_irq(&ide_lock); 796 hwif->hwgroup->busy = 0; 797 spin_unlock_irq(&ide_lock); 798out: 799 return err; 800#else 801 if (arg < 0 || arg > 1) 802 return -EINVAL; 803 804 return -EPERM; 805#endif 806} 807 808int set_pio_mode(ide_drive_t *drive, int arg) 809{ 810 struct request rq; 811 812 if (arg < 0 || arg > 255) 813 return -EINVAL; 814 815 if (drive->hwif->set_pio_mode == NULL) 816 return -ENOSYS; 817 818 if (drive->special.b.set_tune) 819 return -EBUSY; 820 821 ide_init_drive_cmd(&rq); 822 rq.cmd_type = REQ_TYPE_ATA_TASKFILE; 823 824 drive->tune_req = (u8) arg; 825 drive->special.b.set_tune = 1; 826 (void) ide_do_drive_cmd(drive, &rq, ide_wait); 827 return 0; 828} 829 830static int set_unmaskirq(ide_drive_t *drive, int arg) 831{ 832 if (drive->no_unmask) 833 return -EPERM; 834 835 if (arg < 0 || arg > 1) 836 return -EINVAL; 837 838 if (ide_spin_wait_hwgroup(drive)) 839 return -EBUSY; 840 drive->unmask = arg; 841 spin_unlock_irq(&ide_lock); 842 843 return 0; 844} 845 846/** 847 * system_bus_clock - clock guess 848 * 849 * External version of the bus clock guess used by very old IDE drivers 850 * for things like VLB timings. Should not be used. 851 */ 852 853int system_bus_clock (void) 854{ 855 return system_bus_speed; 856} 857 858EXPORT_SYMBOL(system_bus_clock); 859 860static int generic_ide_suspend(struct device *dev, pm_message_t mesg) 861{ 862 ide_drive_t *drive = dev->driver_data; 863 ide_hwif_t *hwif = HWIF(drive); 864 struct request rq; 865 struct request_pm_state rqpm; 866 ide_task_t args; 867 int ret; 868 869 /* Call ACPI _GTM only once */ 870 if (!(drive->dn % 2)) 871 ide_acpi_get_timing(hwif); 872 873 memset(&rq, 0, sizeof(rq)); 874 memset(&rqpm, 0, sizeof(rqpm)); 875 memset(&args, 0, sizeof(args)); 876 rq.cmd_type = REQ_TYPE_PM_SUSPEND; 877 rq.special = &args; 878 rq.data = &rqpm; 879 rqpm.pm_step = ide_pm_state_start_suspend; 880 if (mesg.event == PM_EVENT_PRETHAW) 881 mesg.event = PM_EVENT_FREEZE; 882 rqpm.pm_state = mesg.event; 883 884 ret = ide_do_drive_cmd(drive, &rq, ide_wait); 885 /* only call ACPI _PS3 after both drivers are suspended */ 886 if (!ret && (((drive->dn % 2) && hwif->drives[0].present 887 && hwif->drives[1].present) 888 || !hwif->drives[0].present 889 || !hwif->drives[1].present)) 890 ide_acpi_set_state(hwif, 0); 891 return ret; 892} 893 894static int generic_ide_resume(struct device *dev) 895{ 896 ide_drive_t *drive = dev->driver_data; 897 ide_hwif_t *hwif = HWIF(drive); 898 struct request rq; 899 struct request_pm_state rqpm; 900 ide_task_t args; 901 int err; 902 903 /* Call ACPI _STM only once */ 904 if (!(drive->dn % 2)) { 905 ide_acpi_set_state(hwif, 1); 906 ide_acpi_push_timing(hwif); 907 } 908 909 ide_acpi_exec_tfs(drive); 910 911 memset(&rq, 0, sizeof(rq)); 912 memset(&rqpm, 0, sizeof(rqpm)); 913 memset(&args, 0, sizeof(args)); 914 rq.cmd_type = REQ_TYPE_PM_RESUME; 915 rq.special = &args; 916 rq.data = &rqpm; 917 rqpm.pm_step = ide_pm_state_start_resume; 918 rqpm.pm_state = PM_EVENT_ON; 919 920 err = ide_do_drive_cmd(drive, &rq, ide_head_wait); 921 922 if (err == 0 && dev->driver) { 923 ide_driver_t *drv = to_ide_driver(dev->driver); 924 925 if (drv->resume) 926 drv->resume(drive); 927 } 928 929 return err; 930} 931 932int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev, 933 unsigned int cmd, unsigned long arg) 934{ 935 unsigned long flags; 936 ide_driver_t *drv; 937 void __user *p = (void __user *)arg; 938 int err = 0, (*setfunc)(ide_drive_t *, int); 939 u8 *val; 940 941 switch (cmd) { 942 case HDIO_GET_32BIT: val = &drive->io_32bit; goto read_val; 943 case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val; 944 case HDIO_GET_UNMASKINTR: val = &drive->unmask; goto read_val; 945 case HDIO_GET_DMA: val = &drive->using_dma; goto read_val; 946 case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val; 947 case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val; 948 case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val; 949 case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val; 950 case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val; 951 } 952 953 switch (cmd) { 954 case HDIO_OBSOLETE_IDENTITY: 955 case HDIO_GET_IDENTITY: 956 if (bdev != bdev->bd_contains) 957 return -EINVAL; 958 if (drive->id_read == 0) 959 return -ENOMSG; 960 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142)) 961 return -EFAULT; 962 return 0; 963 964 case HDIO_GET_NICE: 965 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP | 966 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP | 967 drive->nice1 << IDE_NICE_1, 968 (long __user *) arg); 969#ifdef CONFIG_IDE_TASK_IOCTL 970 case HDIO_DRIVE_TASKFILE: 971 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 972 return -EACCES; 973 switch(drive->media) { 974 case ide_disk: 975 return ide_taskfile_ioctl(drive, cmd, arg); 976 default: 977 return -ENOMSG; 978 } 979#endif /* CONFIG_IDE_TASK_IOCTL */ 980 981 case HDIO_DRIVE_CMD: 982 if (!capable(CAP_SYS_RAWIO)) 983 return -EACCES; 984 return ide_cmd_ioctl(drive, cmd, arg); 985 986 case HDIO_DRIVE_TASK: 987 if (!capable(CAP_SYS_RAWIO)) 988 return -EACCES; 989 return ide_task_ioctl(drive, cmd, arg); 990 991 case HDIO_SCAN_HWIF: 992 { 993 hw_regs_t hw; 994 int args[3]; 995 if (!capable(CAP_SYS_RAWIO)) return -EACCES; 996 if (copy_from_user(args, p, 3 * sizeof(int))) 997 return -EFAULT; 998 memset(&hw, 0, sizeof(hw)); 999 ide_init_hwif_ports(&hw, (unsigned long) args[0], 1000 (unsigned long) args[1], NULL); 1001 hw.irq = args[2]; 1002 if (ide_register_hw(&hw, NULL, NULL) == -1) 1003 return -EIO; 1004 return 0; 1005 } 1006 case HDIO_UNREGISTER_HWIF: 1007 if (!capable(CAP_SYS_RAWIO)) return -EACCES; 1008 /* (arg > MAX_HWIFS) checked in function */ 1009 ide_unregister(arg, 1, 1); 1010 return 0; 1011 case HDIO_SET_NICE: 1012 if (!capable(CAP_SYS_ADMIN)) return -EACCES; 1013 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1)))) 1014 return -EPERM; 1015 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1; 1016 drv = *(ide_driver_t **)bdev->bd_disk->private_data; 1017 if (drive->dsc_overlap && !drv->supports_dsc_overlap) { 1018 drive->dsc_overlap = 0; 1019 return -EPERM; 1020 } 1021 drive->nice1 = (arg >> IDE_NICE_1) & 1; 1022 return 0; 1023 case HDIO_DRIVE_RESET: 1024 if (!capable(CAP_SYS_ADMIN)) 1025 return -EACCES; 1026 1027 /* 1028 * Abort the current command on the 1029 * group if there is one, taking 1030 * care not to allow anything else 1031 * to be queued and to die on the 1032 * spot if we miss one somehow 1033 */ 1034 1035 spin_lock_irqsave(&ide_lock, flags); 1036 1037 if (HWGROUP(drive)->resetting) { 1038 spin_unlock_irqrestore(&ide_lock, flags); 1039 return -EBUSY; 1040 } 1041 1042 ide_abort(drive, "drive reset"); 1043 1044 BUG_ON(HWGROUP(drive)->handler); 1045 1046 /* Ensure nothing gets queued after we 1047 drop the lock. Reset will clear the busy */ 1048 1049 HWGROUP(drive)->busy = 1; 1050 spin_unlock_irqrestore(&ide_lock, flags); 1051 (void) ide_do_reset(drive); 1052 1053 return 0; 1054 case HDIO_GET_BUSSTATE: 1055 if (!capable(CAP_SYS_ADMIN)) 1056 return -EACCES; 1057 if (put_user(HWIF(drive)->bus_state, (long __user *)arg)) 1058 return -EFAULT; 1059 return 0; 1060 1061 case HDIO_SET_BUSSTATE: 1062 if (!capable(CAP_SYS_ADMIN)) 1063 return -EACCES; 1064 if (HWIF(drive)->busproc) 1065 return HWIF(drive)->busproc(drive, (int)arg); 1066 return -EOPNOTSUPP; 1067 default: 1068 return -EINVAL; 1069 } 1070 1071read_val: 1072 mutex_lock(&ide_setting_mtx); 1073 spin_lock_irqsave(&ide_lock, flags); 1074 err = *val; 1075 spin_unlock_irqrestore(&ide_lock, flags); 1076 mutex_unlock(&ide_setting_mtx); 1077 return err >= 0 ? put_user(err, (long __user *)arg) : err; 1078 1079set_val: 1080 if (bdev != bdev->bd_contains) 1081 err = -EINVAL; 1082 else { 1083 if (!capable(CAP_SYS_ADMIN)) 1084 err = -EACCES; 1085 else { 1086 mutex_lock(&ide_setting_mtx); 1087 err = setfunc(drive, arg); 1088 mutex_unlock(&ide_setting_mtx); 1089 } 1090 } 1091 return err; 1092} 1093 1094EXPORT_SYMBOL(generic_ide_ioctl); 1095 1096/* 1097 * stridx() returns the offset of c within s, 1098 * or -1 if c is '\0' or not found within s. 1099 */ 1100static int __init stridx (const char *s, char c) 1101{ 1102 char *i = strchr(s, c); 1103 return (i && c) ? i - s : -1; 1104} 1105 1106/* 1107 * match_parm() does parsing for ide_setup(): 1108 * 1109 * 1. the first char of s must be '='. 1110 * 2. if the remainder matches one of the supplied keywords, 1111 * the index (1 based) of the keyword is negated and returned. 1112 * 3. if the remainder is a series of no more than max_vals numbers 1113 * separated by commas, the numbers are saved in vals[] and a 1114 * count of how many were saved is returned. Base10 is assumed, 1115 * and base16 is allowed when prefixed with "0x". 1116 * 4. otherwise, zero is returned. 1117 */ 1118static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals) 1119{ 1120 static const char *decimal = "0123456789"; 1121 static const char *hex = "0123456789abcdef"; 1122 int i, n; 1123 1124 if (*s++ == '=') { 1125 /* 1126 * Try matching against the supplied keywords, 1127 * and return -(index+1) if we match one 1128 */ 1129 if (keywords != NULL) { 1130 for (i = 0; *keywords != NULL; ++i) { 1131 if (!strcmp(s, *keywords++)) 1132 return -(i+1); 1133 } 1134 } 1135 /* 1136 * Look for a series of no more than "max_vals" 1137 * numeric values separated by commas, in base10, 1138 * or base16 when prefixed with "0x". 1139 * Return a count of how many were found. 1140 */ 1141 for (n = 0; (i = stridx(decimal, *s)) >= 0;) { 1142 vals[n] = i; 1143 while ((i = stridx(decimal, *++s)) >= 0) 1144 vals[n] = (vals[n] * 10) + i; 1145 if (*s == 'x' && !vals[n]) { 1146 while ((i = stridx(hex, *++s)) >= 0) 1147 vals[n] = (vals[n] * 0x10) + i; 1148 } 1149 if (++n == max_vals) 1150 break; 1151 if (*s == ',' || *s == ';') 1152 ++s; 1153 } 1154 if (!*s) 1155 return n; 1156 } 1157 return 0; /* zero = nothing matched */ 1158} 1159 1160extern int probe_ali14xx; 1161extern int probe_umc8672; 1162extern int probe_dtc2278; 1163extern int probe_ht6560b; 1164extern int probe_qd65xx; 1165extern int cmd640_vlb; 1166 1167static int __initdata is_chipset_set[MAX_HWIFS]; 1168 1169/* 1170 * ide_setup() gets called VERY EARLY during initialization, 1171 * to handle kernel "command line" strings beginning with "hdx=" or "ide". 1172 * 1173 * Remember to update Documentation/ide/ide.txt if you change something here. 1174 */ 1175static int __init ide_setup(char *s) 1176{ 1177 int i, vals[3]; 1178 ide_hwif_t *hwif; 1179 ide_drive_t *drive; 1180 unsigned int hw, unit; 1181 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1); 1182 const char max_hwif = '0' + (MAX_HWIFS - 1); 1183 1184 1185 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */ 1186 return 0; /* driver and not us */ 1187 1188 if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2)) 1189 return 0; 1190 1191 printk(KERN_INFO "ide_setup: %s", s); 1192 init_ide_data (); 1193 1194#ifdef CONFIG_BLK_DEV_IDEDOUBLER 1195 if (!strcmp(s, "ide=doubler")) { 1196 extern int ide_doubler; 1197 1198 printk(" : Enabled support for IDE doublers\n"); 1199 ide_doubler = 1; 1200 return 1; 1201 } 1202#endif /* CONFIG_BLK_DEV_IDEDOUBLER */ 1203 1204 if (!strcmp(s, "ide=nodma")) { 1205 printk(" : Prevented DMA\n"); 1206 noautodma = 1; 1207 goto obsolete_option; 1208 } 1209 1210#ifdef CONFIG_BLK_DEV_IDEACPI 1211 if (!strcmp(s, "ide=noacpi")) { 1212 //printk(" : Disable IDE ACPI support.\n"); 1213 ide_noacpi = 1; 1214 return 1; 1215 } 1216 if (!strcmp(s, "ide=acpigtf")) { 1217 //printk(" : Enable IDE ACPI _GTF support.\n"); 1218 ide_noacpitfs = 0; 1219 return 1; 1220 } 1221 if (!strcmp(s, "ide=acpionboot")) { 1222 //printk(" : Call IDE ACPI methods on boot.\n"); 1223 ide_noacpionboot = 0; 1224 return 1; 1225 } 1226#endif /* CONFIG_BLK_DEV_IDEACPI */ 1227 1228 /* 1229 * Look for drive options: "hdx=" 1230 */ 1231 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) { 1232 const char *hd_words[] = { 1233 "none", "noprobe", "nowerr", "cdrom", "nodma", 1234 "autotune", "noautotune", "-8", "-9", "-10", 1235 "noflush", "remap", "remap63", "scsi", NULL }; 1236 unit = s[2] - 'a'; 1237 hw = unit / MAX_DRIVES; 1238 unit = unit % MAX_DRIVES; 1239 hwif = &ide_hwifs[hw]; 1240 drive = &hwif->drives[unit]; 1241 if (strncmp(s + 4, "ide-", 4) == 0) { 1242 strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req)); 1243 goto obsolete_option; 1244 } 1245 switch (match_parm(&s[3], hd_words, vals, 3)) { 1246 case -1: /* "none" */ 1247 case -2: /* "noprobe" */ 1248 drive->noprobe = 1; 1249 goto done; 1250 case -3: /* "nowerr" */ 1251 drive->bad_wstat = BAD_R_STAT; 1252 hwif->noprobe = 0; 1253 goto done; 1254 case -4: /* "cdrom" */ 1255 drive->present = 1; 1256 drive->media = ide_cdrom; 1257 /* an ATAPI device ignores DRDY */ 1258 drive->ready_stat = 0; 1259 hwif->noprobe = 0; 1260 goto done; 1261 case -5: /* nodma */ 1262 drive->nodma = 1; 1263 goto done; 1264 case -6: /* "autotune" */ 1265 drive->autotune = IDE_TUNE_AUTO; 1266 goto obsolete_option; 1267 case -7: /* "noautotune" */ 1268 drive->autotune = IDE_TUNE_NOAUTO; 1269 goto obsolete_option; 1270 case -11: /* noflush */ 1271 drive->noflush = 1; 1272 goto done; 1273 case -12: /* "remap" */ 1274 drive->remap_0_to_1 = 1; 1275 goto obsolete_option; 1276 case -13: /* "remap63" */ 1277 drive->sect0 = 63; 1278 goto obsolete_option; 1279 case -14: /* "scsi" */ 1280 drive->scsi = 1; 1281 goto obsolete_option; 1282 case 3: /* cyl,head,sect */ 1283 drive->media = ide_disk; 1284 drive->ready_stat = READY_STAT; 1285 drive->cyl = drive->bios_cyl = vals[0]; 1286 drive->head = drive->bios_head = vals[1]; 1287 drive->sect = drive->bios_sect = vals[2]; 1288 drive->present = 1; 1289 drive->forced_geom = 1; 1290 hwif->noprobe = 0; 1291 goto done; 1292 default: 1293 goto bad_option; 1294 } 1295 } 1296 1297 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e') 1298 goto bad_option; 1299 /* 1300 * Look for bus speed option: "idebus=" 1301 */ 1302 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') { 1303 if (match_parm(&s[6], NULL, vals, 1) != 1) 1304 goto bad_option; 1305 if (vals[0] >= 20 && vals[0] <= 66) { 1306 idebus_parameter = vals[0]; 1307 } else 1308 printk(" -- BAD BUS SPEED! Expected value from 20 to 66"); 1309 goto done; 1310 } 1311 /* 1312 * Look for interface options: "idex=" 1313 */ 1314 if (s[3] >= '0' && s[3] <= max_hwif) { 1315 /* 1316 * Be VERY CAREFUL changing this: note hardcoded indexes below 1317 * (-8, -9, -10) are reserved to ease the hardcoding. 1318 */ 1319 static const char *ide_words[] = { 1320 "noprobe", "serialize", "minus3", "minus4", 1321 "reset", "minus6", "ata66", "minus8", "minus9", 1322 "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb", 1323 "dtc2278", "umc8672", "ali14xx", NULL }; 1324 1325 hw_regs_t hwregs; 1326 1327 hw = s[3] - '0'; 1328 hwif = &ide_hwifs[hw]; 1329 i = match_parm(&s[4], ide_words, vals, 3); 1330 1331 /* 1332 * Cryptic check to ensure chipset not already set for hwif. 1333 * Note: we can't depend on hwif->chipset here. 1334 */ 1335 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) { 1336 /* chipset already specified */ 1337 if (is_chipset_set[hw]) 1338 goto bad_option; 1339 if (i > -18 && i <= -11) { 1340 /* these drivers are for "ide0=" only */ 1341 if (hw != 0) 1342 goto bad_hwif; 1343 /* chipset already specified for 2nd port */ 1344 if (is_chipset_set[hw+1]) 1345 goto bad_option; 1346 } 1347 is_chipset_set[hw] = 1; 1348 printk("\n"); 1349 } 1350 1351 switch (i) { 1352#ifdef CONFIG_BLK_DEV_ALI14XX 1353 case -17: /* "ali14xx" */ 1354 probe_ali14xx = 1; 1355 goto obsolete_option; 1356#endif 1357#ifdef CONFIG_BLK_DEV_UMC8672 1358 case -16: /* "umc8672" */ 1359 probe_umc8672 = 1; 1360 goto obsolete_option; 1361#endif 1362#ifdef CONFIG_BLK_DEV_DTC2278 1363 case -15: /* "dtc2278" */ 1364 probe_dtc2278 = 1; 1365 goto obsolete_option; 1366#endif 1367#ifdef CONFIG_BLK_DEV_CMD640 1368 case -14: /* "cmd640_vlb" */ 1369 cmd640_vlb = 1; 1370 goto obsolete_option; 1371#endif 1372#ifdef CONFIG_BLK_DEV_HT6560B 1373 case -13: /* "ht6560b" */ 1374 probe_ht6560b = 1; 1375 goto obsolete_option; 1376#endif 1377#ifdef CONFIG_BLK_DEV_QD65XX 1378 case -12: /* "qd65xx" */ 1379 probe_qd65xx = 1; 1380 goto obsolete_option; 1381#endif 1382#ifdef CONFIG_BLK_DEV_4DRIVES 1383 case -11: /* "four" drives on one set of ports */ 1384 { 1385 ide_hwif_t *mate = &ide_hwifs[hw^1]; 1386 mate->drives[0].select.all ^= 0x20; 1387 mate->drives[1].select.all ^= 0x20; 1388 hwif->chipset = mate->chipset = ide_4drives; 1389 mate->irq = hwif->irq; 1390 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports)); 1391 hwif->mate = mate; 1392 mate->mate = hwif; 1393 hwif->serialized = mate->serialized = 1; 1394 goto obsolete_option; 1395 } 1396#endif /* CONFIG_BLK_DEV_4DRIVES */ 1397 case -10: /* minus10 */ 1398 case -9: /* minus9 */ 1399 case -8: /* minus8 */ 1400 case -6: 1401 case -4: 1402 case -3: 1403 goto bad_option; 1404 case -7: /* ata66 */ 1405#ifdef CONFIG_BLK_DEV_IDEPCI 1406 /* 1407 * Use ATA_CBL_PATA40_SHORT so drive side 1408 * cable detection is also overriden. 1409 */ 1410 hwif->cbl = ATA_CBL_PATA40_SHORT; 1411 goto obsolete_option; 1412#else 1413 goto bad_hwif; 1414#endif 1415 case -5: /* "reset" */ 1416 hwif->reset = 1; 1417 goto obsolete_option; 1418 case -2: /* "serialize" */ 1419 hwif->mate = &ide_hwifs[hw^1]; 1420 hwif->mate->mate = hwif; 1421 hwif->serialized = hwif->mate->serialized = 1; 1422 goto obsolete_option; 1423 1424 case -1: /* "noprobe" */ 1425 hwif->noprobe = 1; 1426 goto obsolete_option; 1427 1428 case 1: /* base */ 1429 vals[1] = vals[0] + 0x206; /* default ctl */ 1430 case 2: /* base,ctl */ 1431 vals[2] = 0; /* default irq = probe for it */ 1432 case 3: /* base,ctl,irq */ 1433 memset(&hwregs, 0, sizeof(hwregs)); 1434 ide_init_hwif_ports(&hwregs, vals[0], vals[1], &hwif->irq); 1435 memcpy(hwif->io_ports, hwregs.io_ports, sizeof(hwif->io_ports)); 1436 hwif->irq = vals[2]; 1437 hwif->noprobe = 0; 1438 hwif->chipset = ide_forced; 1439 goto obsolete_option; 1440 1441 case 0: goto bad_option; 1442 default: 1443 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n"); 1444 return 1; 1445 } 1446 } 1447bad_option: 1448 printk(" -- BAD OPTION\n"); 1449 return 1; 1450obsolete_option: 1451 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n"); 1452 return 1; 1453bad_hwif: 1454 printk("-- NOT SUPPORTED ON ide%d", hw); 1455done: 1456 printk("\n"); 1457 return 1; 1458} 1459 1460EXPORT_SYMBOL(ide_lock); 1461 1462static int ide_bus_match(struct device *dev, struct device_driver *drv) 1463{ 1464 return 1; 1465} 1466 1467static char *media_string(ide_drive_t *drive) 1468{ 1469 switch (drive->media) { 1470 case ide_disk: 1471 return "disk"; 1472 case ide_cdrom: 1473 return "cdrom"; 1474 case ide_tape: 1475 return "tape"; 1476 case ide_floppy: 1477 return "floppy"; 1478 case ide_optical: 1479 return "optical"; 1480 default: 1481 return "UNKNOWN"; 1482 } 1483} 1484 1485static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf) 1486{ 1487 ide_drive_t *drive = to_ide_device(dev); 1488 return sprintf(buf, "%s\n", media_string(drive)); 1489} 1490 1491static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf) 1492{ 1493 ide_drive_t *drive = to_ide_device(dev); 1494 return sprintf(buf, "%s\n", drive->name); 1495} 1496 1497static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) 1498{ 1499 ide_drive_t *drive = to_ide_device(dev); 1500 return sprintf(buf, "ide:m-%s\n", media_string(drive)); 1501} 1502 1503static ssize_t model_show(struct device *dev, struct device_attribute *attr, 1504 char *buf) 1505{ 1506 ide_drive_t *drive = to_ide_device(dev); 1507 return sprintf(buf, "%s\n", drive->id->model); 1508} 1509 1510static ssize_t firmware_show(struct device *dev, struct device_attribute *attr, 1511 char *buf) 1512{ 1513 ide_drive_t *drive = to_ide_device(dev); 1514 return sprintf(buf, "%s\n", drive->id->fw_rev); 1515} 1516 1517static ssize_t serial_show(struct device *dev, struct device_attribute *attr, 1518 char *buf) 1519{ 1520 ide_drive_t *drive = to_ide_device(dev); 1521 return sprintf(buf, "%s\n", drive->id->serial_no); 1522} 1523 1524static struct device_attribute ide_dev_attrs[] = { 1525 __ATTR_RO(media), 1526 __ATTR_RO(drivename), 1527 __ATTR_RO(modalias), 1528 __ATTR_RO(model), 1529 __ATTR_RO(firmware), 1530 __ATTR(serial, 0400, serial_show, NULL), 1531 __ATTR_NULL 1532}; 1533 1534static int ide_uevent(struct device *dev, struct kobj_uevent_env *env) 1535{ 1536 ide_drive_t *drive = to_ide_device(dev); 1537 1538 add_uevent_var(env, "MEDIA=%s", media_string(drive)); 1539 add_uevent_var(env, "DRIVENAME=%s", drive->name); 1540 add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive)); 1541 return 0; 1542} 1543 1544static int generic_ide_probe(struct device *dev) 1545{ 1546 ide_drive_t *drive = to_ide_device(dev); 1547 ide_driver_t *drv = to_ide_driver(dev->driver); 1548 1549 return drv->probe ? drv->probe(drive) : -ENODEV; 1550} 1551 1552static int generic_ide_remove(struct device *dev) 1553{ 1554 ide_drive_t *drive = to_ide_device(dev); 1555 ide_driver_t *drv = to_ide_driver(dev->driver); 1556 1557 if (drv->remove) 1558 drv->remove(drive); 1559 1560 return 0; 1561} 1562 1563static void generic_ide_shutdown(struct device *dev) 1564{ 1565 ide_drive_t *drive = to_ide_device(dev); 1566 ide_driver_t *drv = to_ide_driver(dev->driver); 1567 1568 if (dev->driver && drv->shutdown) 1569 drv->shutdown(drive); 1570} 1571 1572struct bus_type ide_bus_type = { 1573 .name = "ide", 1574 .match = ide_bus_match, 1575 .uevent = ide_uevent, 1576 .probe = generic_ide_probe, 1577 .remove = generic_ide_remove, 1578 .shutdown = generic_ide_shutdown, 1579 .dev_attrs = ide_dev_attrs, 1580 .suspend = generic_ide_suspend, 1581 .resume = generic_ide_resume, 1582}; 1583 1584EXPORT_SYMBOL_GPL(ide_bus_type); 1585 1586/* 1587 * This is gets invoked once during initialization, to set *everything* up 1588 */ 1589static int __init ide_init(void) 1590{ 1591 int ret; 1592 1593 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n"); 1594 system_bus_speed = ide_system_bus_speed(); 1595 1596 printk(KERN_INFO "ide: Assuming %dMHz system bus speed " 1597 "for PIO modes%s\n", system_bus_speed, 1598 idebus_parameter ? "" : "; override with idebus=xx"); 1599 1600 ret = bus_register(&ide_bus_type); 1601 if (ret < 0) { 1602 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret); 1603 return ret; 1604 } 1605 1606 init_ide_data(); 1607 1608 proc_ide_create(); 1609 1610 return 0; 1611} 1612 1613#ifdef MODULE 1614static char *options = NULL; 1615module_param(options, charp, 0); 1616MODULE_LICENSE("GPL"); 1617 1618static void __init parse_options (char *line) 1619{ 1620 char *next = line; 1621 1622 if (line == NULL || !*line) 1623 return; 1624 while ((line = next) != NULL) { 1625 if ((next = strchr(line,' ')) != NULL) 1626 *next++ = 0; 1627 if (!ide_setup(line)) 1628 printk (KERN_INFO "Unknown option '%s'\n", line); 1629 } 1630} 1631 1632int __init init_module (void) 1633{ 1634 parse_options(options); 1635 return ide_init(); 1636} 1637 1638void __exit cleanup_module (void) 1639{ 1640 int index; 1641 1642 for (index = 0; index < MAX_HWIFS; ++index) 1643 ide_unregister(index, 0, 0); 1644 1645 proc_ide_destroy(); 1646 1647 bus_unregister(&ide_bus_type); 1648} 1649 1650#else /* !MODULE */ 1651 1652__setup("", ide_setup); 1653 1654module_init(ide_init); 1655 1656#endif /* MODULE */ 1657