ide.c revision 9ff6f72f432364991d68e99cae72cb141c166e70
1/* 2 * linux/drivers/ide/ide.c Version 7.00beta2 Mar 05 2003 3 * 4 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below) 5 */ 6 7/* 8 * Mostly written by Mark Lord <mlord@pobox.com> 9 * and Gadi Oxman <gadio@netvision.net.il> 10 * and Andre Hedrick <andre@linux-ide.org> 11 * 12 * See linux/MAINTAINERS for address of current maintainer. 13 * 14 * This is the multiple IDE interface driver, as evolved from hd.c. 15 * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs 16 * (usually 14 & 15). 17 * There can be up to two drives per interface, as per the ATA-2 spec. 18 * 19 * ... 20 * 21 * From hd.c: 22 * | 23 * | It traverses the request-list, using interrupts to jump between functions. 24 * | As nearly all functions can be called within interrupts, we may not sleep. 25 * | Special care is recommended. Have Fun! 26 * | 27 * | modified by Drew Eckhardt to check nr of hd's from the CMOS. 28 * | 29 * | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug 30 * | in the early extended-partition checks and added DM partitions. 31 * | 32 * | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI). 33 * | 34 * | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads", 35 * | and general streamlining by Mark Lord (mlord@pobox.com). 36 * 37 * October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by: 38 * 39 * Mark Lord (mlord@pobox.com) (IDE Perf.Pkg) 40 * Delman Lee (delman@ieee.org) ("Mr. atdisk2") 41 * Scott Snyder (snyder@fnald0.fnal.gov) (ATAPI IDE cd-rom) 42 * 43 * This was a rewrite of just about everything from hd.c, though some original 44 * code is still sprinkled about. Think of it as a major evolution, with 45 * inspiration from lots of linux users, esp. hamish@zot.apana.org.au 46 */ 47 48#define REVISION "Revision: 7.00alpha2" 49#define VERSION "Id: ide.c 7.00a2 20020906" 50 51#define _IDE_C /* Tell ide.h it's really us */ 52 53#include <linux/module.h> 54#include <linux/types.h> 55#include <linux/string.h> 56#include <linux/kernel.h> 57#include <linux/timer.h> 58#include <linux/mm.h> 59#include <linux/interrupt.h> 60#include <linux/major.h> 61#include <linux/errno.h> 62#include <linux/genhd.h> 63#include <linux/blkpg.h> 64#include <linux/slab.h> 65#include <linux/init.h> 66#include <linux/pci.h> 67#include <linux/delay.h> 68#include <linux/ide.h> 69#include <linux/completion.h> 70#include <linux/reboot.h> 71#include <linux/cdrom.h> 72#include <linux/seq_file.h> 73#include <linux/device.h> 74#include <linux/bitops.h> 75 76#include <asm/byteorder.h> 77#include <asm/irq.h> 78#include <asm/uaccess.h> 79#include <asm/io.h> 80 81 82/* default maximum number of failures */ 83#define IDE_DEFAULT_MAX_FAILURES 1 84 85static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR, 86 IDE2_MAJOR, IDE3_MAJOR, 87 IDE4_MAJOR, IDE5_MAJOR, 88 IDE6_MAJOR, IDE7_MAJOR, 89 IDE8_MAJOR, IDE9_MAJOR }; 90 91static int idebus_parameter; /* holds the "idebus=" parameter */ 92static int system_bus_speed; /* holds what we think is VESA/PCI bus speed */ 93 94DEFINE_MUTEX(ide_cfg_mtx); 95 __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock); 96 97#ifdef CONFIG_IDEPCI_PCIBUS_ORDER 98static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */ 99#endif 100 101int noautodma = 0; 102 103#ifdef CONFIG_BLK_DEV_IDEACPI 104int ide_noacpi = 0; 105int ide_noacpitfs = 1; 106int ide_noacpionboot = 1; 107#endif 108 109/* 110 * This is declared extern in ide.h, for access by other IDE modules: 111 */ 112ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */ 113 114EXPORT_SYMBOL(ide_hwifs); 115 116/* 117 * Do not even *think* about calling this! 118 */ 119static void init_hwif_data(ide_hwif_t *hwif, unsigned int index) 120{ 121 unsigned int unit; 122 123 /* bulk initialize hwif & drive info with zeros */ 124 memset(hwif, 0, sizeof(ide_hwif_t)); 125 126 /* fill in any non-zero initial values */ 127 hwif->index = index; 128 hwif->major = ide_hwif_to_major[index]; 129 130 hwif->name[0] = 'i'; 131 hwif->name[1] = 'd'; 132 hwif->name[2] = 'e'; 133 hwif->name[3] = '0' + index; 134 135 hwif->bus_state = BUSSTATE_ON; 136 137 hwif->atapi_dma = 0; /* disable all atapi dma */ 138 139 init_completion(&hwif->gendev_rel_comp); 140 141 default_hwif_iops(hwif); 142 default_hwif_transport(hwif); 143 for (unit = 0; unit < MAX_DRIVES; ++unit) { 144 ide_drive_t *drive = &hwif->drives[unit]; 145 146 drive->media = ide_disk; 147 drive->select.all = (unit<<4)|0xa0; 148 drive->hwif = hwif; 149 drive->ctl = 0x08; 150 drive->ready_stat = READY_STAT; 151 drive->bad_wstat = BAD_W_STAT; 152 drive->special.b.recalibrate = 1; 153 drive->special.b.set_geometry = 1; 154 drive->name[0] = 'h'; 155 drive->name[1] = 'd'; 156 drive->name[2] = 'a' + (index * MAX_DRIVES) + unit; 157 drive->max_failures = IDE_DEFAULT_MAX_FAILURES; 158 drive->using_dma = 0; 159 drive->vdma = 0; 160 INIT_LIST_HEAD(&drive->list); 161 init_completion(&drive->gendev_rel_comp); 162 } 163} 164 165static void init_hwif_default(ide_hwif_t *hwif, unsigned int index) 166{ 167 hw_regs_t hw; 168 169 memset(&hw, 0, sizeof(hw_regs_t)); 170 171 ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq); 172 173 memcpy(&hwif->hw, &hw, sizeof(hw)); 174 memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports)); 175 176 hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET]; 177#ifdef CONFIG_BLK_DEV_HD 178 if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA) 179 hwif->noprobe = 1; /* may be overridden by ide_setup() */ 180#endif 181} 182 183extern void ide_arm_init(void); 184 185/* 186 * init_ide_data() sets reasonable default values into all fields 187 * of all instances of the hwifs and drives, but only on the first call. 188 * Subsequent calls have no effect (they don't wipe out anything). 189 * 190 * This routine is normally called at driver initialization time, 191 * but may also be called MUCH earlier during kernel "command-line" 192 * parameter processing. As such, we cannot depend on any other parts 193 * of the kernel (such as memory allocation) to be functioning yet. 194 * 195 * This is too bad, as otherwise we could dynamically allocate the 196 * ide_drive_t structs as needed, rather than always consuming memory 197 * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them. 198 * 199 * FIXME: We should stuff the setup data into __init and copy the 200 * relevant hwifs/allocate them properly during boot. 201 */ 202#define MAGIC_COOKIE 0x12345678 203static void __init init_ide_data (void) 204{ 205 ide_hwif_t *hwif; 206 unsigned int index; 207 static unsigned long magic_cookie = MAGIC_COOKIE; 208 209 if (magic_cookie != MAGIC_COOKIE) 210 return; /* already initialized */ 211 magic_cookie = 0; 212 213 /* Initialise all interface structures */ 214 for (index = 0; index < MAX_HWIFS; ++index) { 215 hwif = &ide_hwifs[index]; 216 init_hwif_data(hwif, index); 217 init_hwif_default(hwif, index); 218#if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI) 219 hwif->irq = hwif->hw.irq = 220 ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]); 221#endif 222 } 223#ifdef CONFIG_IDE_ARM 224 ide_arm_init(); 225#endif 226} 227 228/** 229 * ide_system_bus_speed - guess bus speed 230 * 231 * ide_system_bus_speed() returns what we think is the system VESA/PCI 232 * bus speed (in MHz). This is used for calculating interface PIO timings. 233 * The default is 40 for known PCI systems, 50 otherwise. 234 * The "idebus=xx" parameter can be used to override this value. 235 * The actual value to be used is computed/displayed the first time 236 * through. Drivers should only use this as a last resort. 237 * 238 * Returns a guessed speed in MHz. 239 */ 240 241static int ide_system_bus_speed(void) 242{ 243#ifdef CONFIG_PCI 244 static struct pci_device_id pci_default[] = { 245 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) }, 246 { } 247 }; 248#else 249#define pci_default 0 250#endif /* CONFIG_PCI */ 251 252 if (!system_bus_speed) { 253 if (idebus_parameter) { 254 /* user supplied value */ 255 system_bus_speed = idebus_parameter; 256 } else if (pci_dev_present(pci_default)) { 257 /* safe default value for PCI */ 258 system_bus_speed = 33; 259 } else { 260 /* safe default value for VESA and PCI */ 261 system_bus_speed = 50; 262 } 263 printk(KERN_INFO "ide: Assuming %dMHz system bus speed " 264 "for PIO modes%s\n", system_bus_speed, 265 idebus_parameter ? "" : "; override with idebus=xx"); 266 } 267 return system_bus_speed; 268} 269 270static struct resource* hwif_request_region(ide_hwif_t *hwif, 271 unsigned long addr, int num) 272{ 273 struct resource *res = request_region(addr, num, hwif->name); 274 275 if (!res) 276 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n", 277 hwif->name, addr, addr+num-1); 278 return res; 279} 280 281/** 282 * ide_hwif_request_regions - request resources for IDE 283 * @hwif: interface to use 284 * 285 * Requests all the needed resources for an interface. 286 * Right now core IDE code does this work which is deeply wrong. 287 * MMIO leaves it to the controller driver, 288 * PIO will migrate this way over time. 289 */ 290 291int ide_hwif_request_regions(ide_hwif_t *hwif) 292{ 293 unsigned long addr; 294 unsigned int i; 295 296 if (hwif->mmio) 297 return 0; 298 addr = hwif->io_ports[IDE_CONTROL_OFFSET]; 299 if (addr && !hwif_request_region(hwif, addr, 1)) 300 goto control_region_busy; 301 hwif->straight8 = 0; 302 addr = hwif->io_ports[IDE_DATA_OFFSET]; 303 if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) { 304 if (!hwif_request_region(hwif, addr, 8)) 305 goto data_region_busy; 306 hwif->straight8 = 1; 307 return 0; 308 } 309 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) { 310 addr = hwif->io_ports[i]; 311 if (!hwif_request_region(hwif, addr, 1)) { 312 while (--i) 313 release_region(addr, 1); 314 goto data_region_busy; 315 } 316 } 317 return 0; 318 319data_region_busy: 320 addr = hwif->io_ports[IDE_CONTROL_OFFSET]; 321 if (addr) 322 release_region(addr, 1); 323control_region_busy: 324 /* If any errors are return, we drop the hwif interface. */ 325 return -EBUSY; 326} 327 328/** 329 * ide_hwif_release_regions - free IDE resources 330 * 331 * Note that we only release the standard ports, 332 * and do not even try to handle any extra ports 333 * allocated for weird IDE interface chipsets. 334 * 335 * Note also that we don't yet handle mmio resources here. More 336 * importantly our caller should be doing this so we need to 337 * restructure this as a helper function for drivers. 338 */ 339 340void ide_hwif_release_regions(ide_hwif_t *hwif) 341{ 342 u32 i = 0; 343 344 if (hwif->mmio) 345 return; 346 if (hwif->io_ports[IDE_CONTROL_OFFSET]) 347 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1); 348 if (hwif->straight8) { 349 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8); 350 return; 351 } 352 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) 353 if (hwif->io_ports[i]) 354 release_region(hwif->io_ports[i], 1); 355} 356 357/** 358 * ide_hwif_restore - restore hwif to template 359 * @hwif: hwif to update 360 * @tmp_hwif: template 361 * 362 * Restore hwif to a previous state by copying most settings 363 * from the template. 364 */ 365 366static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif) 367{ 368 hwif->hwgroup = tmp_hwif->hwgroup; 369 370 hwif->gendev.parent = tmp_hwif->gendev.parent; 371 372 hwif->proc = tmp_hwif->proc; 373 374 hwif->major = tmp_hwif->major; 375 hwif->straight8 = tmp_hwif->straight8; 376 hwif->bus_state = tmp_hwif->bus_state; 377 378 hwif->host_flags = tmp_hwif->host_flags; 379 380 hwif->pio_mask = tmp_hwif->pio_mask; 381 382 hwif->atapi_dma = tmp_hwif->atapi_dma; 383 hwif->ultra_mask = tmp_hwif->ultra_mask; 384 hwif->mwdma_mask = tmp_hwif->mwdma_mask; 385 hwif->swdma_mask = tmp_hwif->swdma_mask; 386 387 hwif->cbl = tmp_hwif->cbl; 388 389 hwif->chipset = tmp_hwif->chipset; 390 hwif->hold = tmp_hwif->hold; 391 392#ifdef CONFIG_BLK_DEV_IDEPCI 393 hwif->pci_dev = tmp_hwif->pci_dev; 394 hwif->cds = tmp_hwif->cds; 395#endif 396 397 hwif->set_pio_mode = tmp_hwif->set_pio_mode; 398 hwif->set_dma_mode = tmp_hwif->set_dma_mode; 399 hwif->mdma_filter = tmp_hwif->mdma_filter; 400 hwif->udma_filter = tmp_hwif->udma_filter; 401 hwif->selectproc = tmp_hwif->selectproc; 402 hwif->reset_poll = tmp_hwif->reset_poll; 403 hwif->pre_reset = tmp_hwif->pre_reset; 404 hwif->resetproc = tmp_hwif->resetproc; 405 hwif->intrproc = tmp_hwif->intrproc; 406 hwif->maskproc = tmp_hwif->maskproc; 407 hwif->quirkproc = tmp_hwif->quirkproc; 408 hwif->busproc = tmp_hwif->busproc; 409 410 hwif->ata_input_data = tmp_hwif->ata_input_data; 411 hwif->ata_output_data = tmp_hwif->ata_output_data; 412 hwif->atapi_input_bytes = tmp_hwif->atapi_input_bytes; 413 hwif->atapi_output_bytes = tmp_hwif->atapi_output_bytes; 414 415 hwif->dma_setup = tmp_hwif->dma_setup; 416 hwif->dma_exec_cmd = tmp_hwif->dma_exec_cmd; 417 hwif->dma_start = tmp_hwif->dma_start; 418 hwif->ide_dma_end = tmp_hwif->ide_dma_end; 419 hwif->ide_dma_on = tmp_hwif->ide_dma_on; 420 hwif->dma_off_quietly = tmp_hwif->dma_off_quietly; 421 hwif->ide_dma_test_irq = tmp_hwif->ide_dma_test_irq; 422 hwif->ide_dma_clear_irq = tmp_hwif->ide_dma_clear_irq; 423 hwif->dma_host_on = tmp_hwif->dma_host_on; 424 hwif->dma_host_off = tmp_hwif->dma_host_off; 425 hwif->dma_lost_irq = tmp_hwif->dma_lost_irq; 426 hwif->dma_timeout = tmp_hwif->dma_timeout; 427 428 hwif->OUTB = tmp_hwif->OUTB; 429 hwif->OUTBSYNC = tmp_hwif->OUTBSYNC; 430 hwif->OUTW = tmp_hwif->OUTW; 431 hwif->OUTSW = tmp_hwif->OUTSW; 432 hwif->OUTSL = tmp_hwif->OUTSL; 433 434 hwif->INB = tmp_hwif->INB; 435 hwif->INW = tmp_hwif->INW; 436 hwif->INSW = tmp_hwif->INSW; 437 hwif->INSL = tmp_hwif->INSL; 438 439 hwif->sg_max_nents = tmp_hwif->sg_max_nents; 440 441 hwif->mmio = tmp_hwif->mmio; 442 hwif->rqsize = tmp_hwif->rqsize; 443 hwif->no_lba48 = tmp_hwif->no_lba48; 444 445#ifndef CONFIG_BLK_DEV_IDECS 446 hwif->irq = tmp_hwif->irq; 447#endif 448 449 hwif->dma_base = tmp_hwif->dma_base; 450 hwif->dma_master = tmp_hwif->dma_master; 451 hwif->dma_command = tmp_hwif->dma_command; 452 hwif->dma_vendor1 = tmp_hwif->dma_vendor1; 453 hwif->dma_status = tmp_hwif->dma_status; 454 hwif->dma_vendor3 = tmp_hwif->dma_vendor3; 455 hwif->dma_prdtable = tmp_hwif->dma_prdtable; 456 457 hwif->config_data = tmp_hwif->config_data; 458 hwif->select_data = tmp_hwif->select_data; 459 hwif->extra_base = tmp_hwif->extra_base; 460 hwif->extra_ports = tmp_hwif->extra_ports; 461 462 hwif->hwif_data = tmp_hwif->hwif_data; 463} 464 465/** 466 * ide_unregister - free an IDE interface 467 * @index: index of interface (will change soon to a pointer) 468 * 469 * Perform the final unregister of an IDE interface. At the moment 470 * we don't refcount interfaces so this will also get split up. 471 * 472 * Locking: 473 * The caller must not hold the IDE locks 474 * The drive present/vanishing is not yet properly locked 475 * Take care with the callbacks. These have been split to avoid 476 * deadlocking the IDE layer. The shutdown callback is called 477 * before we take the lock and free resources. It is up to the 478 * caller to be sure there is no pending I/O here, and that 479 * the interface will not be reopened (present/vanishing locking 480 * isn't yet done BTW). After we commit to the final kill we 481 * call the cleanup callback with the ide locks held. 482 * 483 * Unregister restores the hwif structures to the default state. 484 * This is raving bonkers. 485 */ 486 487void ide_unregister(unsigned int index) 488{ 489 ide_drive_t *drive; 490 ide_hwif_t *hwif, *g; 491 static ide_hwif_t tmp_hwif; /* protected by ide_cfg_mtx */ 492 ide_hwgroup_t *hwgroup; 493 int irq_count = 0, unit; 494 495 BUG_ON(index >= MAX_HWIFS); 496 497 BUG_ON(in_interrupt()); 498 BUG_ON(irqs_disabled()); 499 mutex_lock(&ide_cfg_mtx); 500 spin_lock_irq(&ide_lock); 501 hwif = &ide_hwifs[index]; 502 if (!hwif->present) 503 goto abort; 504 for (unit = 0; unit < MAX_DRIVES; ++unit) { 505 drive = &hwif->drives[unit]; 506 if (!drive->present) 507 continue; 508 spin_unlock_irq(&ide_lock); 509 device_unregister(&drive->gendev); 510 wait_for_completion(&drive->gendev_rel_comp); 511 spin_lock_irq(&ide_lock); 512 } 513 hwif->present = 0; 514 515 spin_unlock_irq(&ide_lock); 516 517 ide_proc_unregister_port(hwif); 518 519 hwgroup = hwif->hwgroup; 520 /* 521 * free the irq if we were the only hwif using it 522 */ 523 g = hwgroup->hwif; 524 do { 525 if (g->irq == hwif->irq) 526 ++irq_count; 527 g = g->next; 528 } while (g != hwgroup->hwif); 529 if (irq_count == 1) 530 free_irq(hwif->irq, hwgroup); 531 532 spin_lock_irq(&ide_lock); 533 /* 534 * Note that we only release the standard ports, 535 * and do not even try to handle any extra ports 536 * allocated for weird IDE interface chipsets. 537 */ 538 ide_hwif_release_regions(hwif); 539 540 /* 541 * Remove us from the hwgroup, and free 542 * the hwgroup if we were the only member 543 */ 544 if (hwif->next == hwif) { 545 BUG_ON(hwgroup->hwif != hwif); 546 kfree(hwgroup); 547 } else { 548 /* There is another interface in hwgroup. 549 * Unlink us, and set hwgroup->drive and ->hwif to 550 * something sane. 551 */ 552 g = hwgroup->hwif; 553 while (g->next != hwif) 554 g = g->next; 555 g->next = hwif->next; 556 if (hwgroup->hwif == hwif) { 557 /* Chose a random hwif for hwgroup->hwif. 558 * It's guaranteed that there are no drives 559 * left in the hwgroup. 560 */ 561 BUG_ON(hwgroup->drive != NULL); 562 hwgroup->hwif = g; 563 } 564 BUG_ON(hwgroup->hwif == hwif); 565 } 566 567 /* More messed up locking ... */ 568 spin_unlock_irq(&ide_lock); 569 device_unregister(&hwif->gendev); 570 wait_for_completion(&hwif->gendev_rel_comp); 571 572 /* 573 * Remove us from the kernel's knowledge 574 */ 575 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS); 576 kfree(hwif->sg_table); 577 unregister_blkdev(hwif->major, hwif->name); 578 spin_lock_irq(&ide_lock); 579 580 if (hwif->dma_base) { 581 (void) ide_release_dma(hwif); 582 583 hwif->dma_base = 0; 584 hwif->dma_master = 0; 585 hwif->dma_command = 0; 586 hwif->dma_vendor1 = 0; 587 hwif->dma_status = 0; 588 hwif->dma_vendor3 = 0; 589 hwif->dma_prdtable = 0; 590 591 hwif->extra_base = 0; 592 hwif->extra_ports = 0; 593 } 594 595 /* copy original settings */ 596 tmp_hwif = *hwif; 597 598 /* restore hwif data to pristine status */ 599 init_hwif_data(hwif, index); 600 init_hwif_default(hwif, index); 601 602 ide_hwif_restore(hwif, &tmp_hwif); 603 604abort: 605 spin_unlock_irq(&ide_lock); 606 mutex_unlock(&ide_cfg_mtx); 607} 608 609EXPORT_SYMBOL(ide_unregister); 610 611 612/** 613 * ide_setup_ports - set up IDE interface ports 614 * @hw: register descriptions 615 * @base: base register 616 * @offsets: table of register offsets 617 * @ctrl: control register 618 * @ack_irq: IRQ ack 619 * @irq: interrupt lie 620 * 621 * Setup hw_regs_t structure described by parameters. You 622 * may set up the hw structure yourself OR use this routine to 623 * do it for you. This is basically a helper 624 * 625 */ 626 627void ide_setup_ports ( hw_regs_t *hw, 628 unsigned long base, int *offsets, 629 unsigned long ctrl, unsigned long intr, 630 ide_ack_intr_t *ack_intr, 631/* 632 * ide_io_ops_t *iops, 633 */ 634 int irq) 635{ 636 int i; 637 638 memset(hw, 0, sizeof(hw_regs_t)); 639 for (i = 0; i < IDE_NR_PORTS; i++) { 640 if (offsets[i] == -1) { 641 switch(i) { 642 case IDE_CONTROL_OFFSET: 643 hw->io_ports[i] = ctrl; 644 break; 645#if defined(CONFIG_AMIGA) || defined(CONFIG_MAC) 646 case IDE_IRQ_OFFSET: 647 hw->io_ports[i] = intr; 648 break; 649#endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */ 650 default: 651 hw->io_ports[i] = 0; 652 break; 653 } 654 } else { 655 hw->io_ports[i] = base + offsets[i]; 656 } 657 } 658 hw->irq = irq; 659 hw->dma = NO_DMA; 660 hw->ack_intr = ack_intr; 661/* 662 * hw->iops = iops; 663 */ 664} 665 666/** 667 * ide_register_hw_with_fixup - register IDE interface 668 * @hw: hardware registers 669 * @initializing: set while initializing built-in drivers 670 * @hwifp: pointer to returned hwif 671 * @fixup: fixup function 672 * 673 * Register an IDE interface, specifying exactly the registers etc. 674 * Set init=1 iff calling before probes have taken place. 675 * 676 * Returns -1 on error. 677 */ 678 679int ide_register_hw_with_fixup(hw_regs_t *hw, int initializing, 680 ide_hwif_t **hwifp, 681 void(*fixup)(ide_hwif_t *hwif)) 682{ 683 int index, retry = 1; 684 ide_hwif_t *hwif; 685 686 do { 687 for (index = 0; index < MAX_HWIFS; ++index) { 688 hwif = &ide_hwifs[index]; 689 if (hwif->hw.io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET]) 690 goto found; 691 } 692 for (index = 0; index < MAX_HWIFS; ++index) { 693 hwif = &ide_hwifs[index]; 694 if (hwif->hold) 695 continue; 696 if ((!hwif->present && !hwif->mate && !initializing) || 697 (!hwif->hw.io_ports[IDE_DATA_OFFSET] && initializing)) 698 goto found; 699 } 700 for (index = 0; index < MAX_HWIFS; index++) 701 ide_unregister(index); 702 } while (retry--); 703 return -1; 704found: 705 if (hwif->present) 706 ide_unregister(index); 707 else if (!hwif->hold) { 708 init_hwif_data(hwif, index); 709 init_hwif_default(hwif, index); 710 } 711 if (hwif->present) 712 return -1; 713 memcpy(&hwif->hw, hw, sizeof(*hw)); 714 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports)); 715 hwif->irq = hw->irq; 716 hwif->noprobe = 0; 717 hwif->chipset = hw->chipset; 718 hwif->gendev.parent = hw->dev; 719 720 if (!initializing) { 721 probe_hwif_init_with_fixup(hwif, fixup); 722 ide_proc_register_port(hwif); 723 } 724 725 if (hwifp) 726 *hwifp = hwif; 727 728 return (initializing || hwif->present) ? index : -1; 729} 730 731EXPORT_SYMBOL(ide_register_hw_with_fixup); 732 733int ide_register_hw(hw_regs_t *hw, int initializing, ide_hwif_t **hwifp) 734{ 735 return ide_register_hw_with_fixup(hw, initializing, hwifp, NULL); 736} 737 738EXPORT_SYMBOL(ide_register_hw); 739 740/* 741 * Locks for IDE setting functionality 742 */ 743 744DEFINE_MUTEX(ide_setting_mtx); 745 746EXPORT_SYMBOL_GPL(ide_setting_mtx); 747 748/** 749 * ide_spin_wait_hwgroup - wait for group 750 * @drive: drive in the group 751 * 752 * Wait for an IDE device group to go non busy and then return 753 * holding the ide_lock which guards the hwgroup->busy status 754 * and right to use it. 755 */ 756 757int ide_spin_wait_hwgroup (ide_drive_t *drive) 758{ 759 ide_hwgroup_t *hwgroup = HWGROUP(drive); 760 unsigned long timeout = jiffies + (3 * HZ); 761 762 spin_lock_irq(&ide_lock); 763 764 while (hwgroup->busy) { 765 unsigned long lflags; 766 spin_unlock_irq(&ide_lock); 767 local_irq_set(lflags); 768 if (time_after(jiffies, timeout)) { 769 local_irq_restore(lflags); 770 printk(KERN_ERR "%s: channel busy\n", drive->name); 771 return -EBUSY; 772 } 773 local_irq_restore(lflags); 774 spin_lock_irq(&ide_lock); 775 } 776 return 0; 777} 778 779EXPORT_SYMBOL(ide_spin_wait_hwgroup); 780 781int set_io_32bit(ide_drive_t *drive, int arg) 782{ 783 if (drive->no_io_32bit) 784 return -EPERM; 785 786 if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1)) 787 return -EINVAL; 788 789 drive->io_32bit = arg; 790#ifdef CONFIG_BLK_DEV_DTC2278 791 if (HWIF(drive)->chipset == ide_dtc2278) 792 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg; 793#endif /* CONFIG_BLK_DEV_DTC2278 */ 794 return 0; 795} 796 797static int set_ksettings(ide_drive_t *drive, int arg) 798{ 799 if (arg < 0 || arg > 1) 800 return -EINVAL; 801 802 if (ide_spin_wait_hwgroup(drive)) 803 return -EBUSY; 804 drive->keep_settings = arg; 805 spin_unlock_irq(&ide_lock); 806 807 return 0; 808} 809 810int set_using_dma(ide_drive_t *drive, int arg) 811{ 812#ifdef CONFIG_BLK_DEV_IDEDMA 813 ide_hwif_t *hwif = drive->hwif; 814 int err = -EPERM; 815 816 if (arg < 0 || arg > 1) 817 return -EINVAL; 818 819 if (!drive->id || !(drive->id->capability & 1)) 820 goto out; 821 822 if (hwif->ide_dma_on == NULL) 823 goto out; 824 825 err = -EBUSY; 826 if (ide_spin_wait_hwgroup(drive)) 827 goto out; 828 /* 829 * set ->busy flag, unlock and let it ride 830 */ 831 hwif->hwgroup->busy = 1; 832 spin_unlock_irq(&ide_lock); 833 834 err = 0; 835 836 if (arg) { 837 hwif->dma_off_quietly(drive); 838 if (ide_set_dma(drive) || hwif->ide_dma_on(drive)) 839 err = -EIO; 840 } else 841 ide_dma_off(drive); 842 843 /* 844 * lock, clear ->busy flag and unlock before leaving 845 */ 846 spin_lock_irq(&ide_lock); 847 hwif->hwgroup->busy = 0; 848 spin_unlock_irq(&ide_lock); 849out: 850 return err; 851#else 852 if (arg < 0 || arg > 1) 853 return -EINVAL; 854 855 return -EPERM; 856#endif 857} 858 859int set_pio_mode(ide_drive_t *drive, int arg) 860{ 861 struct request rq; 862 863 if (arg < 0 || arg > 255) 864 return -EINVAL; 865 866 if (drive->hwif->set_pio_mode == NULL) 867 return -ENOSYS; 868 869 if (drive->special.b.set_tune) 870 return -EBUSY; 871 ide_init_drive_cmd(&rq); 872 drive->tune_req = (u8) arg; 873 drive->special.b.set_tune = 1; 874 (void) ide_do_drive_cmd(drive, &rq, ide_wait); 875 return 0; 876} 877 878static int set_unmaskirq(ide_drive_t *drive, int arg) 879{ 880 if (drive->no_unmask) 881 return -EPERM; 882 883 if (arg < 0 || arg > 1) 884 return -EINVAL; 885 886 if (ide_spin_wait_hwgroup(drive)) 887 return -EBUSY; 888 drive->unmask = arg; 889 spin_unlock_irq(&ide_lock); 890 891 return 0; 892} 893 894/** 895 * system_bus_clock - clock guess 896 * 897 * External version of the bus clock guess used by very old IDE drivers 898 * for things like VLB timings. Should not be used. 899 */ 900 901int system_bus_clock (void) 902{ 903 return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed )); 904} 905 906EXPORT_SYMBOL(system_bus_clock); 907 908static int generic_ide_suspend(struct device *dev, pm_message_t mesg) 909{ 910 ide_drive_t *drive = dev->driver_data; 911 ide_hwif_t *hwif = HWIF(drive); 912 struct request rq; 913 struct request_pm_state rqpm; 914 ide_task_t args; 915 int ret; 916 917 /* Call ACPI _GTM only once */ 918 if (!(drive->dn % 2)) 919 ide_acpi_get_timing(hwif); 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_SUSPEND; 925 rq.special = &args; 926 rq.data = &rqpm; 927 rqpm.pm_step = ide_pm_state_start_suspend; 928 if (mesg.event == PM_EVENT_PRETHAW) 929 mesg.event = PM_EVENT_FREEZE; 930 rqpm.pm_state = mesg.event; 931 932 ret = ide_do_drive_cmd(drive, &rq, ide_wait); 933 /* only call ACPI _PS3 after both drivers are suspended */ 934 if (!ret && (((drive->dn % 2) && hwif->drives[0].present 935 && hwif->drives[1].present) 936 || !hwif->drives[0].present 937 || !hwif->drives[1].present)) 938 ide_acpi_set_state(hwif, 0); 939 return ret; 940} 941 942static int generic_ide_resume(struct device *dev) 943{ 944 ide_drive_t *drive = dev->driver_data; 945 ide_hwif_t *hwif = HWIF(drive); 946 struct request rq; 947 struct request_pm_state rqpm; 948 ide_task_t args; 949 int err; 950 951 /* Call ACPI _STM only once */ 952 if (!(drive->dn % 2)) { 953 ide_acpi_set_state(hwif, 1); 954 ide_acpi_push_timing(hwif); 955 } 956 957 ide_acpi_exec_tfs(drive); 958 959 memset(&rq, 0, sizeof(rq)); 960 memset(&rqpm, 0, sizeof(rqpm)); 961 memset(&args, 0, sizeof(args)); 962 rq.cmd_type = REQ_TYPE_PM_RESUME; 963 rq.special = &args; 964 rq.data = &rqpm; 965 rqpm.pm_step = ide_pm_state_start_resume; 966 rqpm.pm_state = PM_EVENT_ON; 967 968 err = ide_do_drive_cmd(drive, &rq, ide_head_wait); 969 970 if (err == 0 && dev->driver) { 971 ide_driver_t *drv = to_ide_driver(dev->driver); 972 973 if (drv->resume) 974 drv->resume(drive); 975 } 976 977 return err; 978} 979 980int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev, 981 unsigned int cmd, unsigned long arg) 982{ 983 unsigned long flags; 984 ide_driver_t *drv; 985 void __user *p = (void __user *)arg; 986 int err = 0, (*setfunc)(ide_drive_t *, int); 987 u8 *val; 988 989 switch (cmd) { 990 case HDIO_GET_32BIT: val = &drive->io_32bit; goto read_val; 991 case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val; 992 case HDIO_GET_UNMASKINTR: val = &drive->unmask; goto read_val; 993 case HDIO_GET_DMA: val = &drive->using_dma; goto read_val; 994 case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val; 995 case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val; 996 case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val; 997 case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val; 998 case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val; 999 } 1000 1001 switch (cmd) { 1002 case HDIO_OBSOLETE_IDENTITY: 1003 case HDIO_GET_IDENTITY: 1004 if (bdev != bdev->bd_contains) 1005 return -EINVAL; 1006 if (drive->id_read == 0) 1007 return -ENOMSG; 1008 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142)) 1009 return -EFAULT; 1010 return 0; 1011 1012 case HDIO_GET_NICE: 1013 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP | 1014 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP | 1015 drive->nice0 << IDE_NICE_0 | 1016 drive->nice1 << IDE_NICE_1 | 1017 drive->nice2 << IDE_NICE_2, 1018 (long __user *) arg); 1019 1020#ifdef CONFIG_IDE_TASK_IOCTL 1021 case HDIO_DRIVE_TASKFILE: 1022 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 1023 return -EACCES; 1024 switch(drive->media) { 1025 case ide_disk: 1026 return ide_taskfile_ioctl(drive, cmd, arg); 1027 default: 1028 return -ENOMSG; 1029 } 1030#endif /* CONFIG_IDE_TASK_IOCTL */ 1031 1032 case HDIO_DRIVE_CMD: 1033 if (!capable(CAP_SYS_RAWIO)) 1034 return -EACCES; 1035 return ide_cmd_ioctl(drive, cmd, arg); 1036 1037 case HDIO_DRIVE_TASK: 1038 if (!capable(CAP_SYS_RAWIO)) 1039 return -EACCES; 1040 return ide_task_ioctl(drive, cmd, arg); 1041 1042 case HDIO_SCAN_HWIF: 1043 { 1044 hw_regs_t hw; 1045 int args[3]; 1046 if (!capable(CAP_SYS_RAWIO)) return -EACCES; 1047 if (copy_from_user(args, p, 3 * sizeof(int))) 1048 return -EFAULT; 1049 memset(&hw, 0, sizeof(hw)); 1050 ide_init_hwif_ports(&hw, (unsigned long) args[0], 1051 (unsigned long) args[1], NULL); 1052 hw.irq = args[2]; 1053 if (ide_register_hw(&hw, 0, NULL) == -1) 1054 return -EIO; 1055 return 0; 1056 } 1057 case HDIO_UNREGISTER_HWIF: 1058 if (!capable(CAP_SYS_RAWIO)) return -EACCES; 1059 /* (arg > MAX_HWIFS) checked in function */ 1060 ide_unregister(arg); 1061 return 0; 1062 case HDIO_SET_NICE: 1063 if (!capable(CAP_SYS_ADMIN)) return -EACCES; 1064 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1)))) 1065 return -EPERM; 1066 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1; 1067 drv = *(ide_driver_t **)bdev->bd_disk->private_data; 1068 if (drive->dsc_overlap && !drv->supports_dsc_overlap) { 1069 drive->dsc_overlap = 0; 1070 return -EPERM; 1071 } 1072 drive->nice1 = (arg >> IDE_NICE_1) & 1; 1073 return 0; 1074 case HDIO_DRIVE_RESET: 1075 { 1076 unsigned long flags; 1077 if (!capable(CAP_SYS_ADMIN)) return -EACCES; 1078 1079 /* 1080 * Abort the current command on the 1081 * group if there is one, taking 1082 * care not to allow anything else 1083 * to be queued and to die on the 1084 * spot if we miss one somehow 1085 */ 1086 1087 spin_lock_irqsave(&ide_lock, flags); 1088 1089 if (HWGROUP(drive)->resetting) { 1090 spin_unlock_irqrestore(&ide_lock, flags); 1091 return -EBUSY; 1092 } 1093 1094 ide_abort(drive, "drive reset"); 1095 1096 BUG_ON(HWGROUP(drive)->handler); 1097 1098 /* Ensure nothing gets queued after we 1099 drop the lock. Reset will clear the busy */ 1100 1101 HWGROUP(drive)->busy = 1; 1102 spin_unlock_irqrestore(&ide_lock, flags); 1103 (void) ide_do_reset(drive); 1104 1105 return 0; 1106 } 1107 1108 case HDIO_GET_BUSSTATE: 1109 if (!capable(CAP_SYS_ADMIN)) 1110 return -EACCES; 1111 if (put_user(HWIF(drive)->bus_state, (long __user *)arg)) 1112 return -EFAULT; 1113 return 0; 1114 1115 case HDIO_SET_BUSSTATE: 1116 if (!capable(CAP_SYS_ADMIN)) 1117 return -EACCES; 1118 if (HWIF(drive)->busproc) 1119 return HWIF(drive)->busproc(drive, (int)arg); 1120 return -EOPNOTSUPP; 1121 default: 1122 return -EINVAL; 1123 } 1124 1125read_val: 1126 mutex_lock(&ide_setting_mtx); 1127 spin_lock_irqsave(&ide_lock, flags); 1128 err = *val; 1129 spin_unlock_irqrestore(&ide_lock, flags); 1130 mutex_unlock(&ide_setting_mtx); 1131 return err >= 0 ? put_user(err, (long __user *)arg) : err; 1132 1133set_val: 1134 if (bdev != bdev->bd_contains) 1135 err = -EINVAL; 1136 else { 1137 if (!capable(CAP_SYS_ADMIN)) 1138 err = -EACCES; 1139 else { 1140 mutex_lock(&ide_setting_mtx); 1141 err = setfunc(drive, arg); 1142 mutex_unlock(&ide_setting_mtx); 1143 } 1144 } 1145 return err; 1146} 1147 1148EXPORT_SYMBOL(generic_ide_ioctl); 1149 1150/* 1151 * stridx() returns the offset of c within s, 1152 * or -1 if c is '\0' or not found within s. 1153 */ 1154static int __init stridx (const char *s, char c) 1155{ 1156 char *i = strchr(s, c); 1157 return (i && c) ? i - s : -1; 1158} 1159 1160/* 1161 * match_parm() does parsing for ide_setup(): 1162 * 1163 * 1. the first char of s must be '='. 1164 * 2. if the remainder matches one of the supplied keywords, 1165 * the index (1 based) of the keyword is negated and returned. 1166 * 3. if the remainder is a series of no more than max_vals numbers 1167 * separated by commas, the numbers are saved in vals[] and a 1168 * count of how many were saved is returned. Base10 is assumed, 1169 * and base16 is allowed when prefixed with "0x". 1170 * 4. otherwise, zero is returned. 1171 */ 1172static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals) 1173{ 1174 static const char *decimal = "0123456789"; 1175 static const char *hex = "0123456789abcdef"; 1176 int i, n; 1177 1178 if (*s++ == '=') { 1179 /* 1180 * Try matching against the supplied keywords, 1181 * and return -(index+1) if we match one 1182 */ 1183 if (keywords != NULL) { 1184 for (i = 0; *keywords != NULL; ++i) { 1185 if (!strcmp(s, *keywords++)) 1186 return -(i+1); 1187 } 1188 } 1189 /* 1190 * Look for a series of no more than "max_vals" 1191 * numeric values separated by commas, in base10, 1192 * or base16 when prefixed with "0x". 1193 * Return a count of how many were found. 1194 */ 1195 for (n = 0; (i = stridx(decimal, *s)) >= 0;) { 1196 vals[n] = i; 1197 while ((i = stridx(decimal, *++s)) >= 0) 1198 vals[n] = (vals[n] * 10) + i; 1199 if (*s == 'x' && !vals[n]) { 1200 while ((i = stridx(hex, *++s)) >= 0) 1201 vals[n] = (vals[n] * 0x10) + i; 1202 } 1203 if (++n == max_vals) 1204 break; 1205 if (*s == ',' || *s == ';') 1206 ++s; 1207 } 1208 if (!*s) 1209 return n; 1210 } 1211 return 0; /* zero = nothing matched */ 1212} 1213 1214#ifdef CONFIG_BLK_DEV_ALI14XX 1215extern int probe_ali14xx; 1216extern int ali14xx_init(void); 1217#endif 1218#ifdef CONFIG_BLK_DEV_UMC8672 1219extern int probe_umc8672; 1220extern int umc8672_init(void); 1221#endif 1222#ifdef CONFIG_BLK_DEV_DTC2278 1223extern int probe_dtc2278; 1224extern int dtc2278_init(void); 1225#endif 1226#ifdef CONFIG_BLK_DEV_HT6560B 1227extern int probe_ht6560b; 1228extern int ht6560b_init(void); 1229#endif 1230#ifdef CONFIG_BLK_DEV_QD65XX 1231extern int probe_qd65xx; 1232extern int qd65xx_init(void); 1233#endif 1234 1235static int __initdata is_chipset_set[MAX_HWIFS]; 1236 1237/* 1238 * ide_setup() gets called VERY EARLY during initialization, 1239 * to handle kernel "command line" strings beginning with "hdx=" or "ide". 1240 * 1241 * Remember to update Documentation/ide.txt if you change something here. 1242 */ 1243static int __init ide_setup(char *s) 1244{ 1245 int i, vals[3]; 1246 ide_hwif_t *hwif; 1247 ide_drive_t *drive; 1248 unsigned int hw, unit; 1249 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1); 1250 const char max_hwif = '0' + (MAX_HWIFS - 1); 1251 1252 1253 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */ 1254 return 0; /* driver and not us */ 1255 1256 if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2)) 1257 return 0; 1258 1259 printk(KERN_INFO "ide_setup: %s", s); 1260 init_ide_data (); 1261 1262#ifdef CONFIG_BLK_DEV_IDEDOUBLER 1263 if (!strcmp(s, "ide=doubler")) { 1264 extern int ide_doubler; 1265 1266 printk(" : Enabled support for IDE doublers\n"); 1267 ide_doubler = 1; 1268 return 1; 1269 } 1270#endif /* CONFIG_BLK_DEV_IDEDOUBLER */ 1271 1272 if (!strcmp(s, "ide=nodma")) { 1273 printk(" : Prevented DMA\n"); 1274 noautodma = 1; 1275 return 1; 1276 } 1277 1278#ifdef CONFIG_IDEPCI_PCIBUS_ORDER 1279 if (!strcmp(s, "ide=reverse")) { 1280 ide_scan_direction = 1; 1281 printk(" : Enabled support for IDE inverse scan order.\n"); 1282 return 1; 1283 } 1284#endif 1285 1286#ifdef CONFIG_BLK_DEV_IDEACPI 1287 if (!strcmp(s, "ide=noacpi")) { 1288 //printk(" : Disable IDE ACPI support.\n"); 1289 ide_noacpi = 1; 1290 return 1; 1291 } 1292 if (!strcmp(s, "ide=acpigtf")) { 1293 //printk(" : Enable IDE ACPI _GTF support.\n"); 1294 ide_noacpitfs = 0; 1295 return 1; 1296 } 1297 if (!strcmp(s, "ide=acpionboot")) { 1298 //printk(" : Call IDE ACPI methods on boot.\n"); 1299 ide_noacpionboot = 0; 1300 return 1; 1301 } 1302#endif /* CONFIG_BLK_DEV_IDEACPI */ 1303 1304 /* 1305 * Look for drive options: "hdx=" 1306 */ 1307 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) { 1308 const char *hd_words[] = { 1309 "none", "noprobe", "nowerr", "cdrom", "minus5", 1310 "autotune", "noautotune", "minus8", "swapdata", "bswap", 1311 "noflush", "remap", "remap63", "scsi", NULL }; 1312 unit = s[2] - 'a'; 1313 hw = unit / MAX_DRIVES; 1314 unit = unit % MAX_DRIVES; 1315 hwif = &ide_hwifs[hw]; 1316 drive = &hwif->drives[unit]; 1317 if (strncmp(s + 4, "ide-", 4) == 0) { 1318 strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req)); 1319 goto done; 1320 } 1321 switch (match_parm(&s[3], hd_words, vals, 3)) { 1322 case -1: /* "none" */ 1323 case -2: /* "noprobe" */ 1324 drive->noprobe = 1; 1325 goto done; 1326 case -3: /* "nowerr" */ 1327 drive->bad_wstat = BAD_R_STAT; 1328 hwif->noprobe = 0; 1329 goto done; 1330 case -4: /* "cdrom" */ 1331 drive->present = 1; 1332 drive->media = ide_cdrom; 1333 /* an ATAPI device ignores DRDY */ 1334 drive->ready_stat = 0; 1335 hwif->noprobe = 0; 1336 goto done; 1337 case -6: /* "autotune" */ 1338 drive->autotune = IDE_TUNE_AUTO; 1339 goto obsolete_option; 1340 case -7: /* "noautotune" */ 1341 drive->autotune = IDE_TUNE_NOAUTO; 1342 goto obsolete_option; 1343 case -9: /* "swapdata" */ 1344 case -10: /* "bswap" */ 1345 drive->bswap = 1; 1346 goto done; 1347 case -11: /* noflush */ 1348 drive->noflush = 1; 1349 goto done; 1350 case -12: /* "remap" */ 1351 drive->remap_0_to_1 = 1; 1352 goto done; 1353 case -13: /* "remap63" */ 1354 drive->sect0 = 63; 1355 goto done; 1356 case -14: /* "scsi" */ 1357 drive->scsi = 1; 1358 goto done; 1359 case 3: /* cyl,head,sect */ 1360 drive->media = ide_disk; 1361 drive->ready_stat = READY_STAT; 1362 drive->cyl = drive->bios_cyl = vals[0]; 1363 drive->head = drive->bios_head = vals[1]; 1364 drive->sect = drive->bios_sect = vals[2]; 1365 drive->present = 1; 1366 drive->forced_geom = 1; 1367 hwif->noprobe = 0; 1368 goto done; 1369 default: 1370 goto bad_option; 1371 } 1372 } 1373 1374 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e') 1375 goto bad_option; 1376 /* 1377 * Look for bus speed option: "idebus=" 1378 */ 1379 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') { 1380 if (match_parm(&s[6], NULL, vals, 1) != 1) 1381 goto bad_option; 1382 if (vals[0] >= 20 && vals[0] <= 66) { 1383 idebus_parameter = vals[0]; 1384 } else 1385 printk(" -- BAD BUS SPEED! Expected value from 20 to 66"); 1386 goto done; 1387 } 1388 /* 1389 * Look for interface options: "idex=" 1390 */ 1391 if (s[3] >= '0' && s[3] <= max_hwif) { 1392 /* 1393 * Be VERY CAREFUL changing this: note hardcoded indexes below 1394 * (-8, -9, -10) are reserved to ease the hardcoding. 1395 */ 1396 static const char *ide_words[] = { 1397 "noprobe", "serialize", "minus3", "minus4", 1398 "reset", "minus6", "ata66", "minus8", "minus9", 1399 "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb", 1400 "dtc2278", "umc8672", "ali14xx", NULL }; 1401 hw = s[3] - '0'; 1402 hwif = &ide_hwifs[hw]; 1403 i = match_parm(&s[4], ide_words, vals, 3); 1404 1405 /* 1406 * Cryptic check to ensure chipset not already set for hwif. 1407 * Note: we can't depend on hwif->chipset here. 1408 */ 1409 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) { 1410 /* chipset already specified */ 1411 if (is_chipset_set[hw]) 1412 goto bad_option; 1413 if (i > -18 && i <= -11) { 1414 /* these drivers are for "ide0=" only */ 1415 if (hw != 0) 1416 goto bad_hwif; 1417 /* chipset already specified for 2nd port */ 1418 if (is_chipset_set[hw+1]) 1419 goto bad_option; 1420 } 1421 is_chipset_set[hw] = 1; 1422 printk("\n"); 1423 } 1424 1425 switch (i) { 1426#ifdef CONFIG_BLK_DEV_ALI14XX 1427 case -17: /* "ali14xx" */ 1428 probe_ali14xx = 1; 1429 goto done; 1430#endif 1431#ifdef CONFIG_BLK_DEV_UMC8672 1432 case -16: /* "umc8672" */ 1433 probe_umc8672 = 1; 1434 goto done; 1435#endif 1436#ifdef CONFIG_BLK_DEV_DTC2278 1437 case -15: /* "dtc2278" */ 1438 probe_dtc2278 = 1; 1439 goto done; 1440#endif 1441#ifdef CONFIG_BLK_DEV_CMD640 1442 case -14: /* "cmd640_vlb" */ 1443 { 1444 extern int cmd640_vlb; /* flag for cmd640.c */ 1445 cmd640_vlb = 1; 1446 goto done; 1447 } 1448#endif 1449#ifdef CONFIG_BLK_DEV_HT6560B 1450 case -13: /* "ht6560b" */ 1451 probe_ht6560b = 1; 1452 goto done; 1453#endif 1454#ifdef CONFIG_BLK_DEV_QD65XX 1455 case -12: /* "qd65xx" */ 1456 probe_qd65xx = 1; 1457 goto done; 1458#endif 1459#ifdef CONFIG_BLK_DEV_4DRIVES 1460 case -11: /* "four" drives on one set of ports */ 1461 { 1462 ide_hwif_t *mate = &ide_hwifs[hw^1]; 1463 mate->drives[0].select.all ^= 0x20; 1464 mate->drives[1].select.all ^= 0x20; 1465 hwif->chipset = mate->chipset = ide_4drives; 1466 mate->irq = hwif->irq; 1467 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports)); 1468 hwif->mate = mate; 1469 mate->mate = hwif; 1470 hwif->serialized = mate->serialized = 1; 1471 goto obsolete_option; 1472 } 1473#endif /* CONFIG_BLK_DEV_4DRIVES */ 1474 case -10: /* minus10 */ 1475 case -9: /* minus9 */ 1476 case -8: /* minus8 */ 1477 case -6: 1478 case -4: 1479 case -3: 1480 goto bad_option; 1481 case -7: /* ata66 */ 1482#ifdef CONFIG_BLK_DEV_IDEPCI 1483 /* 1484 * Use ATA_CBL_PATA40_SHORT so drive side 1485 * cable detection is also overriden. 1486 */ 1487 hwif->cbl = ATA_CBL_PATA40_SHORT; 1488 goto obsolete_option; 1489#else 1490 goto bad_hwif; 1491#endif 1492 case -5: /* "reset" */ 1493 hwif->reset = 1; 1494 goto obsolete_option; 1495 case -2: /* "serialize" */ 1496 hwif->mate = &ide_hwifs[hw^1]; 1497 hwif->mate->mate = hwif; 1498 hwif->serialized = hwif->mate->serialized = 1; 1499 goto obsolete_option; 1500 1501 case -1: /* "noprobe" */ 1502 hwif->noprobe = 1; 1503 goto done; 1504 1505 case 1: /* base */ 1506 vals[1] = vals[0] + 0x206; /* default ctl */ 1507 case 2: /* base,ctl */ 1508 vals[2] = 0; /* default irq = probe for it */ 1509 case 3: /* base,ctl,irq */ 1510 hwif->hw.irq = vals[2]; 1511 ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq); 1512 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports)); 1513 hwif->irq = vals[2]; 1514 hwif->noprobe = 0; 1515 hwif->chipset = ide_forced; 1516 goto obsolete_option; 1517 1518 case 0: goto bad_option; 1519 default: 1520 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n"); 1521 return 1; 1522 } 1523 } 1524bad_option: 1525 printk(" -- BAD OPTION\n"); 1526 return 1; 1527obsolete_option: 1528 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n"); 1529 return 1; 1530bad_hwif: 1531 printk("-- NOT SUPPORTED ON ide%d", hw); 1532done: 1533 printk("\n"); 1534 return 1; 1535} 1536 1537extern void __init pnpide_init(void); 1538extern void __exit pnpide_exit(void); 1539extern void __init h8300_ide_init(void); 1540 1541/* 1542 * probe_for_hwifs() finds/initializes "known" IDE interfaces 1543 */ 1544static void __init probe_for_hwifs (void) 1545{ 1546#ifdef CONFIG_IDEPCI_PCIBUS_ORDER 1547 ide_scan_pcibus(ide_scan_direction); 1548#endif 1549 1550#ifdef CONFIG_ETRAX_IDE 1551 { 1552 extern void init_e100_ide(void); 1553 init_e100_ide(); 1554 } 1555#endif /* CONFIG_ETRAX_IDE */ 1556#ifdef CONFIG_BLK_DEV_CMD640 1557 { 1558 extern void ide_probe_for_cmd640x(void); 1559 ide_probe_for_cmd640x(); 1560 } 1561#endif /* CONFIG_BLK_DEV_CMD640 */ 1562#ifdef CONFIG_BLK_DEV_IDE_PMAC 1563 { 1564 extern int pmac_ide_probe(void); 1565 (void)pmac_ide_probe(); 1566 } 1567#endif /* CONFIG_BLK_DEV_IDE_PMAC */ 1568#ifdef CONFIG_BLK_DEV_GAYLE 1569 { 1570 extern void gayle_init(void); 1571 gayle_init(); 1572 } 1573#endif /* CONFIG_BLK_DEV_GAYLE */ 1574#ifdef CONFIG_BLK_DEV_FALCON_IDE 1575 { 1576 extern void falconide_init(void); 1577 falconide_init(); 1578 } 1579#endif /* CONFIG_BLK_DEV_FALCON_IDE */ 1580#ifdef CONFIG_BLK_DEV_MAC_IDE 1581 { 1582 extern void macide_init(void); 1583 macide_init(); 1584 } 1585#endif /* CONFIG_BLK_DEV_MAC_IDE */ 1586#ifdef CONFIG_BLK_DEV_Q40IDE 1587 { 1588 extern void q40ide_init(void); 1589 q40ide_init(); 1590 } 1591#endif /* CONFIG_BLK_DEV_Q40IDE */ 1592#ifdef CONFIG_BLK_DEV_BUDDHA 1593 { 1594 extern void buddha_init(void); 1595 buddha_init(); 1596 } 1597#endif /* CONFIG_BLK_DEV_BUDDHA */ 1598#ifdef CONFIG_BLK_DEV_IDEPNP 1599 pnpide_init(); 1600#endif 1601#ifdef CONFIG_H8300 1602 h8300_ide_init(); 1603#endif 1604} 1605 1606/* 1607 * Probe module 1608 */ 1609 1610EXPORT_SYMBOL(ide_lock); 1611 1612static int ide_bus_match(struct device *dev, struct device_driver *drv) 1613{ 1614 return 1; 1615} 1616 1617static char *media_string(ide_drive_t *drive) 1618{ 1619 switch (drive->media) { 1620 case ide_disk: 1621 return "disk"; 1622 case ide_cdrom: 1623 return "cdrom"; 1624 case ide_tape: 1625 return "tape"; 1626 case ide_floppy: 1627 return "floppy"; 1628 case ide_optical: 1629 return "optical"; 1630 default: 1631 return "UNKNOWN"; 1632 } 1633} 1634 1635static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf) 1636{ 1637 ide_drive_t *drive = to_ide_device(dev); 1638 return sprintf(buf, "%s\n", media_string(drive)); 1639} 1640 1641static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf) 1642{ 1643 ide_drive_t *drive = to_ide_device(dev); 1644 return sprintf(buf, "%s\n", drive->name); 1645} 1646 1647static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) 1648{ 1649 ide_drive_t *drive = to_ide_device(dev); 1650 return sprintf(buf, "ide:m-%s\n", media_string(drive)); 1651} 1652 1653static struct device_attribute ide_dev_attrs[] = { 1654 __ATTR_RO(media), 1655 __ATTR_RO(drivename), 1656 __ATTR_RO(modalias), 1657 __ATTR_NULL 1658}; 1659 1660static int ide_uevent(struct device *dev, struct kobj_uevent_env *env) 1661{ 1662 ide_drive_t *drive = to_ide_device(dev); 1663 1664 add_uevent_var(env, "MEDIA=%s", media_string(drive)); 1665 add_uevent_var(env, "DRIVENAME=%s", drive->name); 1666 add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive)); 1667 return 0; 1668} 1669 1670static int generic_ide_probe(struct device *dev) 1671{ 1672 ide_drive_t *drive = to_ide_device(dev); 1673 ide_driver_t *drv = to_ide_driver(dev->driver); 1674 1675 return drv->probe ? drv->probe(drive) : -ENODEV; 1676} 1677 1678static int generic_ide_remove(struct device *dev) 1679{ 1680 ide_drive_t *drive = to_ide_device(dev); 1681 ide_driver_t *drv = to_ide_driver(dev->driver); 1682 1683 if (drv->remove) 1684 drv->remove(drive); 1685 1686 return 0; 1687} 1688 1689static void generic_ide_shutdown(struct device *dev) 1690{ 1691 ide_drive_t *drive = to_ide_device(dev); 1692 ide_driver_t *drv = to_ide_driver(dev->driver); 1693 1694 if (dev->driver && drv->shutdown) 1695 drv->shutdown(drive); 1696} 1697 1698struct bus_type ide_bus_type = { 1699 .name = "ide", 1700 .match = ide_bus_match, 1701 .uevent = ide_uevent, 1702 .probe = generic_ide_probe, 1703 .remove = generic_ide_remove, 1704 .shutdown = generic_ide_shutdown, 1705 .dev_attrs = ide_dev_attrs, 1706 .suspend = generic_ide_suspend, 1707 .resume = generic_ide_resume, 1708}; 1709 1710EXPORT_SYMBOL_GPL(ide_bus_type); 1711 1712/* 1713 * This is gets invoked once during initialization, to set *everything* up 1714 */ 1715static int __init ide_init(void) 1716{ 1717 int ret; 1718 1719 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n"); 1720 system_bus_speed = ide_system_bus_speed(); 1721 1722 ret = bus_register(&ide_bus_type); 1723 if (ret < 0) { 1724 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret); 1725 return ret; 1726 } 1727 1728 init_ide_data(); 1729 1730 proc_ide_create(); 1731 1732#ifdef CONFIG_BLK_DEV_ALI14XX 1733 if (probe_ali14xx) 1734 (void)ali14xx_init(); 1735#endif 1736#ifdef CONFIG_BLK_DEV_UMC8672 1737 if (probe_umc8672) 1738 (void)umc8672_init(); 1739#endif 1740#ifdef CONFIG_BLK_DEV_DTC2278 1741 if (probe_dtc2278) 1742 (void)dtc2278_init(); 1743#endif 1744#ifdef CONFIG_BLK_DEV_HT6560B 1745 if (probe_ht6560b) 1746 (void)ht6560b_init(); 1747#endif 1748#ifdef CONFIG_BLK_DEV_QD65XX 1749 if (probe_qd65xx) 1750 (void)qd65xx_init(); 1751#endif 1752 1753 /* Probe for special PCI and other "known" interface chipsets. */ 1754 probe_for_hwifs(); 1755 1756 return 0; 1757} 1758 1759#ifdef MODULE 1760static char *options = NULL; 1761module_param(options, charp, 0); 1762MODULE_LICENSE("GPL"); 1763 1764static void __init parse_options (char *line) 1765{ 1766 char *next = line; 1767 1768 if (line == NULL || !*line) 1769 return; 1770 while ((line = next) != NULL) { 1771 if ((next = strchr(line,' ')) != NULL) 1772 *next++ = 0; 1773 if (!ide_setup(line)) 1774 printk (KERN_INFO "Unknown option '%s'\n", line); 1775 } 1776} 1777 1778int __init init_module (void) 1779{ 1780 parse_options(options); 1781 return ide_init(); 1782} 1783 1784void __exit cleanup_module (void) 1785{ 1786 int index; 1787 1788 for (index = 0; index < MAX_HWIFS; ++index) 1789 ide_unregister(index); 1790 1791#ifdef CONFIG_BLK_DEV_IDEPNP 1792 pnpide_exit(); 1793#endif 1794 1795 proc_ide_destroy(); 1796 1797 bus_unregister(&ide_bus_type); 1798} 1799 1800#else /* !MODULE */ 1801 1802__setup("", ide_setup); 1803 1804module_init(ide_init); 1805 1806#endif /* MODULE */ 1807