ide-probe.c revision e160124ff6868e53511b16412d2ea91f87936be0
1/* 2 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below) 3 * Copyright (C) 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 IDE probe module, as evolved from hd.c and ide.c. 14 * 15 * -- increase WAIT_PIDENTIFY to avoid CD-ROM locking at boot 16 * by Andrea Arcangeli 17 */ 18 19#include <linux/module.h> 20#include <linux/types.h> 21#include <linux/string.h> 22#include <linux/kernel.h> 23#include <linux/timer.h> 24#include <linux/mm.h> 25#include <linux/interrupt.h> 26#include <linux/major.h> 27#include <linux/errno.h> 28#include <linux/genhd.h> 29#include <linux/slab.h> 30#include <linux/delay.h> 31#include <linux/ide.h> 32#include <linux/spinlock.h> 33#include <linux/kmod.h> 34#include <linux/pci.h> 35#include <linux/scatterlist.h> 36 37#include <asm/byteorder.h> 38#include <asm/irq.h> 39#include <asm/uaccess.h> 40#include <asm/io.h> 41 42/** 43 * generic_id - add a generic drive id 44 * @drive: drive to make an ID block for 45 * 46 * Add a fake id field to the drive we are passed. This allows 47 * use to skip a ton of NULL checks (which people always miss) 48 * and make drive properties unconditional outside of this file 49 */ 50 51static void generic_id(ide_drive_t *drive) 52{ 53 drive->id->cyls = drive->cyl; 54 drive->id->heads = drive->head; 55 drive->id->sectors = drive->sect; 56 drive->id->cur_cyls = drive->cyl; 57 drive->id->cur_heads = drive->head; 58 drive->id->cur_sectors = drive->sect; 59} 60 61static void ide_disk_init_chs(ide_drive_t *drive) 62{ 63 struct hd_driveid *id = drive->id; 64 65 /* Extract geometry if we did not already have one for the drive */ 66 if (!drive->cyl || !drive->head || !drive->sect) { 67 drive->cyl = drive->bios_cyl = id->cyls; 68 drive->head = drive->bios_head = id->heads; 69 drive->sect = drive->bios_sect = id->sectors; 70 } 71 72 /* Handle logical geometry translation by the drive */ 73 if ((id->field_valid & 1) && id->cur_cyls && 74 id->cur_heads && (id->cur_heads <= 16) && id->cur_sectors) { 75 drive->cyl = id->cur_cyls; 76 drive->head = id->cur_heads; 77 drive->sect = id->cur_sectors; 78 } 79 80 /* Use physical geometry if what we have still makes no sense */ 81 if (drive->head > 16 && id->heads && id->heads <= 16) { 82 drive->cyl = id->cyls; 83 drive->head = id->heads; 84 drive->sect = id->sectors; 85 } 86} 87 88static void ide_disk_init_mult_count(ide_drive_t *drive) 89{ 90 struct hd_driveid *id = drive->id; 91 92 drive->mult_count = 0; 93 if (id->max_multsect) { 94#ifdef CONFIG_IDEDISK_MULTI_MODE 95 id->multsect = ((id->max_multsect/2) > 1) ? id->max_multsect : 0; 96 id->multsect_valid = id->multsect ? 1 : 0; 97 drive->mult_req = id->multsect_valid ? id->max_multsect : 0; 98 drive->special.b.set_multmode = drive->mult_req ? 1 : 0; 99#else /* original, pre IDE-NFG, per request of AC */ 100 drive->mult_req = 0; 101 if (drive->mult_req > id->max_multsect) 102 drive->mult_req = id->max_multsect; 103 if (drive->mult_req || ((id->multsect_valid & 1) && id->multsect)) 104 drive->special.b.set_multmode = 1; 105#endif 106 } 107} 108 109/** 110 * do_identify - identify a drive 111 * @drive: drive to identify 112 * @cmd: command used 113 * 114 * Called when we have issued a drive identify command to 115 * read and parse the results. This function is run with 116 * interrupts disabled. 117 */ 118 119static inline void do_identify (ide_drive_t *drive, u8 cmd) 120{ 121 ide_hwif_t *hwif = HWIF(drive); 122 int bswap = 1; 123 struct hd_driveid *id; 124 125 id = drive->id; 126 /* read 512 bytes of id info */ 127 hwif->ata_input_data(drive, id, SECTOR_WORDS); 128 129 drive->id_read = 1; 130 local_irq_enable(); 131#ifdef DEBUG 132 printk(KERN_INFO "%s: dumping identify data\n", drive->name); 133 ide_dump_identify((u8 *)id); 134#endif 135 ide_fix_driveid(id); 136 137#if defined (CONFIG_SCSI_EATA_PIO) || defined (CONFIG_SCSI_EATA) 138 /* 139 * EATA SCSI controllers do a hardware ATA emulation: 140 * Ignore them if there is a driver for them available. 141 */ 142 if ((id->model[0] == 'P' && id->model[1] == 'M') || 143 (id->model[0] == 'S' && id->model[1] == 'K')) { 144 printk("%s: EATA SCSI HBA %.10s\n", drive->name, id->model); 145 goto err_misc; 146 } 147#endif /* CONFIG_SCSI_EATA || CONFIG_SCSI_EATA_PIO */ 148 149 /* 150 * WIN_IDENTIFY returns little-endian info, 151 * WIN_PIDENTIFY *usually* returns little-endian info. 152 */ 153 if (cmd == WIN_PIDENTIFY) { 154 if ((id->model[0] == 'N' && id->model[1] == 'E') /* NEC */ 155 || (id->model[0] == 'F' && id->model[1] == 'X') /* Mitsumi */ 156 || (id->model[0] == 'P' && id->model[1] == 'i'))/* Pioneer */ 157 /* Vertos drives may still be weird */ 158 bswap ^= 1; 159 } 160 ide_fixstring(id->model, sizeof(id->model), bswap); 161 ide_fixstring(id->fw_rev, sizeof(id->fw_rev), bswap); 162 ide_fixstring(id->serial_no, sizeof(id->serial_no), bswap); 163 164 /* we depend on this a lot! */ 165 id->model[sizeof(id->model)-1] = '\0'; 166 167 if (strstr(id->model, "E X A B Y T E N E S T")) 168 goto err_misc; 169 170 printk("%s: %s, ", drive->name, id->model); 171 drive->present = 1; 172 drive->dead = 0; 173 174 /* 175 * Check for an ATAPI device 176 */ 177 if (cmd == WIN_PIDENTIFY) { 178 u8 type = (id->config >> 8) & 0x1f; 179 printk("ATAPI "); 180 switch (type) { 181 case ide_floppy: 182 if (!strstr(id->model, "CD-ROM")) { 183 if (!strstr(id->model, "oppy") && 184 !strstr(id->model, "poyp") && 185 !strstr(id->model, "ZIP")) 186 printk("cdrom or floppy?, assuming "); 187 if (drive->media != ide_cdrom) { 188 printk ("FLOPPY"); 189 drive->removable = 1; 190 break; 191 } 192 } 193 /* Early cdrom models used zero */ 194 type = ide_cdrom; 195 case ide_cdrom: 196 drive->removable = 1; 197#ifdef CONFIG_PPC 198 /* kludge for Apple PowerBook internal zip */ 199 if (!strstr(id->model, "CD-ROM") && 200 strstr(id->model, "ZIP")) { 201 printk ("FLOPPY"); 202 type = ide_floppy; 203 break; 204 } 205#endif 206 printk ("CD/DVD-ROM"); 207 break; 208 case ide_tape: 209 printk ("TAPE"); 210 break; 211 case ide_optical: 212 printk ("OPTICAL"); 213 drive->removable = 1; 214 break; 215 default: 216 printk("UNKNOWN (type %d)", type); 217 break; 218 } 219 printk (" drive\n"); 220 drive->media = type; 221 /* an ATAPI device ignores DRDY */ 222 drive->ready_stat = 0; 223 return; 224 } 225 226 /* 227 * Not an ATAPI device: looks like a "regular" hard disk 228 */ 229 230 /* 231 * 0x848a = CompactFlash device 232 * These are *not* removable in Linux definition of the term 233 */ 234 235 if ((id->config != 0x848a) && (id->config & (1<<7))) 236 drive->removable = 1; 237 238 drive->media = ide_disk; 239 printk("%s DISK drive\n", (id->config == 0x848a) ? "CFA" : "ATA" ); 240 241 return; 242 243err_misc: 244 kfree(id); 245 drive->present = 0; 246 return; 247} 248 249/** 250 * actual_try_to_identify - send ata/atapi identify 251 * @drive: drive to identify 252 * @cmd: command to use 253 * 254 * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive 255 * and waits for a response. It also monitors irqs while this is 256 * happening, in hope of automatically determining which one is 257 * being used by the interface. 258 * 259 * Returns: 0 device was identified 260 * 1 device timed-out (no response to identify request) 261 * 2 device aborted the command (refused to identify itself) 262 */ 263 264static int actual_try_to_identify (ide_drive_t *drive, u8 cmd) 265{ 266 ide_hwif_t *hwif = HWIF(drive); 267 int use_altstatus = 0, rc; 268 unsigned long timeout; 269 u8 s = 0, a = 0; 270 271 /* take a deep breath */ 272 msleep(50); 273 274 if (hwif->io_ports[IDE_CONTROL_OFFSET]) { 275 a = ide_read_altstatus(drive); 276 s = ide_read_status(drive); 277 if ((a ^ s) & ~INDEX_STAT) 278 /* ancient Seagate drives, broken interfaces */ 279 printk(KERN_INFO "%s: probing with STATUS(0x%02x) " 280 "instead of ALTSTATUS(0x%02x)\n", 281 drive->name, s, a); 282 else 283 /* use non-intrusive polling */ 284 use_altstatus = 1; 285 } 286 287 /* set features register for atapi 288 * identify command to be sure of reply 289 */ 290 if ((cmd == WIN_PIDENTIFY)) 291 /* disable dma & overlap */ 292 hwif->OUTB(0, hwif->io_ports[IDE_FEATURE_OFFSET]); 293 294 /* ask drive for ID */ 295 hwif->OUTB(cmd, hwif->io_ports[IDE_COMMAND_OFFSET]); 296 297 timeout = ((cmd == WIN_IDENTIFY) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2; 298 timeout += jiffies; 299 do { 300 if (time_after(jiffies, timeout)) { 301 /* drive timed-out */ 302 return 1; 303 } 304 /* give drive a breather */ 305 msleep(50); 306 s = use_altstatus ? ide_read_altstatus(drive) 307 : ide_read_status(drive); 308 } while (s & BUSY_STAT); 309 310 /* wait for IRQ and DRQ_STAT */ 311 msleep(50); 312 s = ide_read_status(drive); 313 314 if (OK_STAT(s, DRQ_STAT, BAD_R_STAT)) { 315 unsigned long flags; 316 317 /* local CPU only; some systems need this */ 318 local_irq_save(flags); 319 /* drive returned ID */ 320 do_identify(drive, cmd); 321 /* drive responded with ID */ 322 rc = 0; 323 /* clear drive IRQ */ 324 (void)ide_read_status(drive); 325 local_irq_restore(flags); 326 } else { 327 /* drive refused ID */ 328 rc = 2; 329 } 330 return rc; 331} 332 333/** 334 * try_to_identify - try to identify a drive 335 * @drive: drive to probe 336 * @cmd: command to use 337 * 338 * Issue the identify command and then do IRQ probing to 339 * complete the identification when needed by finding the 340 * IRQ the drive is attached to 341 */ 342 343static int try_to_identify (ide_drive_t *drive, u8 cmd) 344{ 345 ide_hwif_t *hwif = HWIF(drive); 346 int retval; 347 int autoprobe = 0; 348 unsigned long cookie = 0; 349 350 /* 351 * Disable device irq unless we need to 352 * probe for it. Otherwise we'll get spurious 353 * interrupts during the identify-phase that 354 * the irq handler isn't expecting. 355 */ 356 if (hwif->io_ports[IDE_CONTROL_OFFSET]) { 357 if (!hwif->irq) { 358 autoprobe = 1; 359 cookie = probe_irq_on(); 360 } 361 ide_set_irq(drive, autoprobe); 362 } 363 364 retval = actual_try_to_identify(drive, cmd); 365 366 if (autoprobe) { 367 int irq; 368 369 ide_set_irq(drive, 0); 370 /* clear drive IRQ */ 371 (void)ide_read_status(drive); 372 udelay(5); 373 irq = probe_irq_off(cookie); 374 if (!hwif->irq) { 375 if (irq > 0) { 376 hwif->irq = irq; 377 } else { 378 /* Mmmm.. multiple IRQs.. 379 * don't know which was ours 380 */ 381 printk("%s: IRQ probe failed (0x%lx)\n", 382 drive->name, cookie); 383 } 384 } 385 } 386 return retval; 387} 388 389static int ide_busy_sleep(ide_hwif_t *hwif) 390{ 391 unsigned long timeout = jiffies + WAIT_WORSTCASE; 392 u8 stat; 393 394 do { 395 msleep(50); 396 stat = hwif->INB(hwif->io_ports[IDE_STATUS_OFFSET]); 397 if ((stat & BUSY_STAT) == 0) 398 return 0; 399 } while (time_before(jiffies, timeout)); 400 401 return 1; 402} 403 404/** 405 * do_probe - probe an IDE device 406 * @drive: drive to probe 407 * @cmd: command to use 408 * 409 * do_probe() has the difficult job of finding a drive if it exists, 410 * without getting hung up if it doesn't exist, without trampling on 411 * ethernet cards, and without leaving any IRQs dangling to haunt us later. 412 * 413 * If a drive is "known" to exist (from CMOS or kernel parameters), 414 * but does not respond right away, the probe will "hang in there" 415 * for the maximum wait time (about 30 seconds), otherwise it will 416 * exit much more quickly. 417 * 418 * Returns: 0 device was identified 419 * 1 device timed-out (no response to identify request) 420 * 2 device aborted the command (refused to identify itself) 421 * 3 bad status from device (possible for ATAPI drives) 422 * 4 probe was not attempted because failure was obvious 423 */ 424 425static int do_probe (ide_drive_t *drive, u8 cmd) 426{ 427 ide_hwif_t *hwif = HWIF(drive); 428 int rc; 429 u8 stat; 430 431 if (drive->present) { 432 /* avoid waiting for inappropriate probes */ 433 if ((drive->media != ide_disk) && (cmd == WIN_IDENTIFY)) 434 return 4; 435 } 436#ifdef DEBUG 437 printk("probing for %s: present=%d, media=%d, probetype=%s\n", 438 drive->name, drive->present, drive->media, 439 (cmd == WIN_IDENTIFY) ? "ATA" : "ATAPI"); 440#endif 441 442 /* needed for some systems 443 * (e.g. crw9624 as drive0 with disk as slave) 444 */ 445 msleep(50); 446 SELECT_DRIVE(drive); 447 msleep(50); 448 if (hwif->INB(hwif->io_ports[IDE_SELECT_OFFSET]) != drive->select.all && 449 !drive->present) { 450 if (drive->select.b.unit != 0) { 451 /* exit with drive0 selected */ 452 SELECT_DRIVE(&hwif->drives[0]); 453 /* allow BUSY_STAT to assert & clear */ 454 msleep(50); 455 } 456 /* no i/f present: mmm.. this should be a 4 -ml */ 457 return 3; 458 } 459 460 stat = ide_read_status(drive); 461 462 if (OK_STAT(stat, READY_STAT, BUSY_STAT) || 463 drive->present || cmd == WIN_PIDENTIFY) { 464 /* send cmd and wait */ 465 if ((rc = try_to_identify(drive, cmd))) { 466 /* failed: try again */ 467 rc = try_to_identify(drive,cmd); 468 } 469 470 stat = ide_read_status(drive); 471 472 if (stat == (BUSY_STAT | READY_STAT)) 473 return 4; 474 475 if (rc == 1 && cmd == WIN_PIDENTIFY) { 476 printk(KERN_ERR "%s: no response (status = 0x%02x), " 477 "resetting drive\n", drive->name, stat); 478 msleep(50); 479 hwif->OUTB(drive->select.all, 480 hwif->io_ports[IDE_SELECT_OFFSET]); 481 msleep(50); 482 hwif->OUTB(WIN_SRST, 483 hwif->io_ports[IDE_COMMAND_OFFSET]); 484 (void)ide_busy_sleep(hwif); 485 rc = try_to_identify(drive, cmd); 486 } 487 488 /* ensure drive IRQ is clear */ 489 stat = ide_read_status(drive); 490 491 if (rc == 1) 492 printk(KERN_ERR "%s: no response (status = 0x%02x)\n", 493 drive->name, stat); 494 } else { 495 /* not present or maybe ATAPI */ 496 rc = 3; 497 } 498 if (drive->select.b.unit != 0) { 499 /* exit with drive0 selected */ 500 SELECT_DRIVE(&hwif->drives[0]); 501 msleep(50); 502 /* ensure drive irq is clear */ 503 (void)ide_read_status(drive); 504 } 505 return rc; 506} 507 508/* 509 * 510 */ 511static void enable_nest (ide_drive_t *drive) 512{ 513 ide_hwif_t *hwif = HWIF(drive); 514 u8 stat; 515 516 printk("%s: enabling %s -- ", hwif->name, drive->id->model); 517 SELECT_DRIVE(drive); 518 msleep(50); 519 hwif->OUTB(EXABYTE_ENABLE_NEST, hwif->io_ports[IDE_COMMAND_OFFSET]); 520 521 if (ide_busy_sleep(hwif)) { 522 printk(KERN_CONT "failed (timeout)\n"); 523 return; 524 } 525 526 msleep(50); 527 528 stat = ide_read_status(drive); 529 530 if (!OK_STAT(stat, 0, BAD_STAT)) 531 printk(KERN_CONT "failed (status = 0x%02x)\n", stat); 532 else 533 printk(KERN_CONT "success\n"); 534 535 /* if !(success||timed-out) */ 536 if (do_probe(drive, WIN_IDENTIFY) >= 2) { 537 /* look for ATAPI device */ 538 (void) do_probe(drive, WIN_PIDENTIFY); 539 } 540} 541 542/** 543 * probe_for_drives - upper level drive probe 544 * @drive: drive to probe for 545 * 546 * probe_for_drive() tests for existence of a given drive using do_probe() 547 * and presents things to the user as needed. 548 * 549 * Returns: 0 no device was found 550 * 1 device was found (note: drive->present might 551 * still be 0) 552 */ 553 554static inline u8 probe_for_drive (ide_drive_t *drive) 555{ 556 /* 557 * In order to keep things simple we have an id 558 * block for all drives at all times. If the device 559 * is pre ATA or refuses ATA/ATAPI identify we 560 * will add faked data to this. 561 * 562 * Also note that 0 everywhere means "can't do X" 563 */ 564 565 drive->id = kzalloc(SECTOR_WORDS *4, GFP_KERNEL); 566 drive->id_read = 0; 567 if(drive->id == NULL) 568 { 569 printk(KERN_ERR "ide: out of memory for id data.\n"); 570 return 0; 571 } 572 strcpy(drive->id->model, "UNKNOWN"); 573 574 /* skip probing? */ 575 if (!drive->noprobe) 576 { 577 /* if !(success||timed-out) */ 578 if (do_probe(drive, WIN_IDENTIFY) >= 2) { 579 /* look for ATAPI device */ 580 (void) do_probe(drive, WIN_PIDENTIFY); 581 } 582 if (!drive->present) 583 /* drive not found */ 584 return 0; 585 if (strstr(drive->id->model, "E X A B Y T E N E S T")) 586 enable_nest(drive); 587 588 /* identification failed? */ 589 if (!drive->id_read) { 590 if (drive->media == ide_disk) { 591 printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n", 592 drive->name, drive->cyl, 593 drive->head, drive->sect); 594 } else if (drive->media == ide_cdrom) { 595 printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name); 596 } else { 597 /* nuke it */ 598 printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name); 599 drive->present = 0; 600 } 601 } 602 /* drive was found */ 603 } 604 if(!drive->present) 605 return 0; 606 /* The drive wasn't being helpful. Add generic info only */ 607 if (drive->id_read == 0) { 608 generic_id(drive); 609 return 1; 610 } 611 612 if (drive->media == ide_disk) { 613 ide_disk_init_chs(drive); 614 ide_disk_init_mult_count(drive); 615 } 616 617 return drive->present; 618} 619 620static void hwif_release_dev (struct device *dev) 621{ 622 ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev); 623 624 complete(&hwif->gendev_rel_comp); 625} 626 627static int ide_register_port(ide_hwif_t *hwif) 628{ 629 int ret; 630 631 /* register with global device tree */ 632 strlcpy(hwif->gendev.bus_id,hwif->name,BUS_ID_SIZE); 633 hwif->gendev.driver_data = hwif; 634 if (hwif->gendev.parent == NULL) { 635 if (hwif->dev) 636 hwif->gendev.parent = hwif->dev; 637 else 638 /* Would like to do = &device_legacy */ 639 hwif->gendev.parent = NULL; 640 } 641 hwif->gendev.release = hwif_release_dev; 642 ret = device_register(&hwif->gendev); 643 if (ret < 0) { 644 printk(KERN_WARNING "IDE: %s: device_register error: %d\n", 645 __func__, ret); 646 goto out; 647 } 648 649 get_device(&hwif->gendev); 650 651 hwif->portdev = device_create(ide_port_class, &hwif->gendev, 652 MKDEV(0, 0), hwif->name); 653 if (IS_ERR(hwif->portdev)) { 654 ret = PTR_ERR(hwif->portdev); 655 device_unregister(&hwif->gendev); 656 } 657 dev_set_drvdata(hwif->portdev, hwif); 658out: 659 return ret; 660} 661 662/** 663 * ide_port_wait_ready - wait for port to become ready 664 * @hwif: IDE port 665 * 666 * This is needed on some PPCs and a bunch of BIOS-less embedded 667 * platforms. Typical cases are: 668 * 669 * - The firmware hard reset the disk before booting the kernel, 670 * the drive is still doing it's poweron-reset sequence, that 671 * can take up to 30 seconds. 672 * 673 * - The firmware does nothing (or no firmware), the device is 674 * still in POST state (same as above actually). 675 * 676 * - Some CD/DVD/Writer combo drives tend to drive the bus during 677 * their reset sequence even when they are non-selected slave 678 * devices, thus preventing discovery of the main HD. 679 * 680 * Doing this wait-for-non-busy should not harm any existing 681 * configuration and fix some issues like the above. 682 * 683 * BenH. 684 * 685 * Returns 0 on success, error code (< 0) otherwise. 686 */ 687 688static int ide_port_wait_ready(ide_hwif_t *hwif) 689{ 690 int unit, rc; 691 692 printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name); 693 694 /* Let HW settle down a bit from whatever init state we 695 * come from */ 696 mdelay(2); 697 698 /* Wait for BSY bit to go away, spec timeout is 30 seconds, 699 * I know of at least one disk who takes 31 seconds, I use 35 700 * here to be safe 701 */ 702 rc = ide_wait_not_busy(hwif, 35000); 703 if (rc) 704 return rc; 705 706 /* Now make sure both master & slave are ready */ 707 for (unit = 0; unit < MAX_DRIVES; unit++) { 708 ide_drive_t *drive = &hwif->drives[unit]; 709 710 /* Ignore disks that we will not probe for later. */ 711 if (!drive->noprobe || drive->present) { 712 SELECT_DRIVE(drive); 713 ide_set_irq(drive, 1); 714 mdelay(2); 715 rc = ide_wait_not_busy(hwif, 35000); 716 if (rc) 717 goto out; 718 } else 719 printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n", 720 drive->name); 721 } 722out: 723 /* Exit function with master reselected (let's be sane) */ 724 if (unit) 725 SELECT_DRIVE(&hwif->drives[0]); 726 727 return rc; 728} 729 730/** 731 * ide_undecoded_slave - look for bad CF adapters 732 * @drive1: drive 733 * 734 * Analyse the drives on the interface and attempt to decide if we 735 * have the same drive viewed twice. This occurs with crap CF adapters 736 * and PCMCIA sometimes. 737 */ 738 739void ide_undecoded_slave(ide_drive_t *drive1) 740{ 741 ide_drive_t *drive0 = &drive1->hwif->drives[0]; 742 743 if ((drive1->dn & 1) == 0 || drive0->present == 0) 744 return; 745 746 /* If the models don't match they are not the same product */ 747 if (strcmp(drive0->id->model, drive1->id->model)) 748 return; 749 750 /* Serial numbers do not match */ 751 if (strncmp(drive0->id->serial_no, drive1->id->serial_no, 20)) 752 return; 753 754 /* No serial number, thankfully very rare for CF */ 755 if (drive0->id->serial_no[0] == 0) 756 return; 757 758 /* Appears to be an IDE flash adapter with decode bugs */ 759 printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n"); 760 761 drive1->present = 0; 762} 763 764EXPORT_SYMBOL_GPL(ide_undecoded_slave); 765 766static int ide_probe_port(ide_hwif_t *hwif) 767{ 768 unsigned long flags; 769 unsigned int irqd; 770 int unit, rc = -ENODEV; 771 772 BUG_ON(hwif->present); 773 774 if (hwif->drives[0].noprobe && hwif->drives[1].noprobe) 775 return -EACCES; 776 777 /* 778 * We must always disable IRQ, as probe_for_drive will assert IRQ, but 779 * we'll install our IRQ driver much later... 780 */ 781 irqd = hwif->irq; 782 if (irqd) 783 disable_irq(hwif->irq); 784 785 local_irq_set(flags); 786 787 if (ide_port_wait_ready(hwif) == -EBUSY) 788 printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name); 789 790 /* 791 * Second drive should only exist if first drive was found, 792 * but a lot of cdrom drives are configured as single slaves. 793 */ 794 for (unit = 0; unit < MAX_DRIVES; ++unit) { 795 ide_drive_t *drive = &hwif->drives[unit]; 796 drive->dn = (hwif->channel ? 2 : 0) + unit; 797 (void) probe_for_drive(drive); 798 if (drive->present) 799 rc = 0; 800 } 801 802 local_irq_restore(flags); 803 804 /* 805 * Use cached IRQ number. It might be (and is...) changed by probe 806 * code above 807 */ 808 if (irqd) 809 enable_irq(irqd); 810 811 return rc; 812} 813 814static void ide_port_tune_devices(ide_hwif_t *hwif) 815{ 816 const struct ide_port_ops *port_ops = hwif->port_ops; 817 int unit; 818 819 for (unit = 0; unit < MAX_DRIVES; unit++) { 820 ide_drive_t *drive = &hwif->drives[unit]; 821 822 if (drive->present && port_ops && port_ops->quirkproc) 823 port_ops->quirkproc(drive); 824 } 825 826 for (unit = 0; unit < MAX_DRIVES; ++unit) { 827 ide_drive_t *drive = &hwif->drives[unit]; 828 829 if (drive->present) { 830 if (drive->autotune) 831 ide_set_max_pio(drive); 832 833 drive->nice1 = 1; 834 835 if (hwif->dma_ops) 836 ide_set_dma(drive); 837 } 838 } 839 840 for (unit = 0; unit < MAX_DRIVES; ++unit) { 841 ide_drive_t *drive = &hwif->drives[unit]; 842 843 if (hwif->host_flags & IDE_HFLAG_NO_IO_32BIT) 844 drive->no_io_32bit = 1; 845 else 846 drive->no_io_32bit = drive->id->dword_io ? 1 : 0; 847 } 848} 849 850#if MAX_HWIFS > 1 851/* 852 * save_match() is used to simplify logic in init_irq() below. 853 * 854 * A loophole here is that we may not know about a particular 855 * hwif's irq until after that hwif is actually probed/initialized.. 856 * This could be a problem for the case where an hwif is on a 857 * dual interface that requires serialization (eg. cmd640) and another 858 * hwif using one of the same irqs is initialized beforehand. 859 * 860 * This routine detects and reports such situations, but does not fix them. 861 */ 862static void save_match(ide_hwif_t *hwif, ide_hwif_t *new, ide_hwif_t **match) 863{ 864 ide_hwif_t *m = *match; 865 866 if (m && m->hwgroup && m->hwgroup != new->hwgroup) { 867 if (!new->hwgroup) 868 return; 869 printk("%s: potential irq problem with %s and %s\n", 870 hwif->name, new->name, m->name); 871 } 872 if (!m || m->irq != hwif->irq) /* don't undo a prior perfect match */ 873 *match = new; 874} 875#endif /* MAX_HWIFS > 1 */ 876 877/* 878 * init request queue 879 */ 880static int ide_init_queue(ide_drive_t *drive) 881{ 882 struct request_queue *q; 883 ide_hwif_t *hwif = HWIF(drive); 884 int max_sectors = 256; 885 int max_sg_entries = PRD_ENTRIES; 886 887 /* 888 * Our default set up assumes the normal IDE case, 889 * that is 64K segmenting, standard PRD setup 890 * and LBA28. Some drivers then impose their own 891 * limits and LBA48 we could raise it but as yet 892 * do not. 893 */ 894 895 q = blk_init_queue_node(do_ide_request, &ide_lock, hwif_to_node(hwif)); 896 if (!q) 897 return 1; 898 899 q->queuedata = drive; 900 blk_queue_segment_boundary(q, 0xffff); 901 902 if (hwif->rqsize < max_sectors) 903 max_sectors = hwif->rqsize; 904 blk_queue_max_sectors(q, max_sectors); 905 906#ifdef CONFIG_PCI 907 /* When we have an IOMMU, we may have a problem where pci_map_sg() 908 * creates segments that don't completely match our boundary 909 * requirements and thus need to be broken up again. Because it 910 * doesn't align properly either, we may actually have to break up 911 * to more segments than what was we got in the first place, a max 912 * worst case is twice as many. 913 * This will be fixed once we teach pci_map_sg() about our boundary 914 * requirements, hopefully soon. *FIXME* 915 */ 916 if (!PCI_DMA_BUS_IS_PHYS) 917 max_sg_entries >>= 1; 918#endif /* CONFIG_PCI */ 919 920 blk_queue_max_hw_segments(q, max_sg_entries); 921 blk_queue_max_phys_segments(q, max_sg_entries); 922 923 /* assign drive queue */ 924 drive->queue = q; 925 926 /* needs drive->queue to be set */ 927 ide_toggle_bounce(drive, 1); 928 929 return 0; 930} 931 932static void ide_add_drive_to_hwgroup(ide_drive_t *drive) 933{ 934 ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; 935 936 spin_lock_irq(&ide_lock); 937 if (!hwgroup->drive) { 938 /* first drive for hwgroup. */ 939 drive->next = drive; 940 hwgroup->drive = drive; 941 hwgroup->hwif = HWIF(hwgroup->drive); 942 } else { 943 drive->next = hwgroup->drive->next; 944 hwgroup->drive->next = drive; 945 } 946 spin_unlock_irq(&ide_lock); 947} 948 949/* 950 * For any present drive: 951 * - allocate the block device queue 952 * - link drive into the hwgroup 953 */ 954static void ide_port_setup_devices(ide_hwif_t *hwif) 955{ 956 int i; 957 958 mutex_lock(&ide_cfg_mtx); 959 for (i = 0; i < MAX_DRIVES; i++) { 960 ide_drive_t *drive = &hwif->drives[i]; 961 962 if (!drive->present) 963 continue; 964 965 if (ide_init_queue(drive)) { 966 printk(KERN_ERR "ide: failed to init %s\n", 967 drive->name); 968 continue; 969 } 970 971 ide_add_drive_to_hwgroup(drive); 972 } 973 mutex_unlock(&ide_cfg_mtx); 974} 975 976/* 977 * This routine sets up the irq for an ide interface, and creates a new 978 * hwgroup for the irq/hwif if none was previously assigned. 979 * 980 * Much of the code is for correctly detecting/handling irq sharing 981 * and irq serialization situations. This is somewhat complex because 982 * it handles static as well as dynamic (PCMCIA) IDE interfaces. 983 */ 984static int init_irq (ide_hwif_t *hwif) 985{ 986 unsigned int index; 987 ide_hwgroup_t *hwgroup; 988 ide_hwif_t *match = NULL; 989 990 991 BUG_ON(in_interrupt()); 992 BUG_ON(irqs_disabled()); 993 BUG_ON(hwif == NULL); 994 995 mutex_lock(&ide_cfg_mtx); 996 hwif->hwgroup = NULL; 997#if MAX_HWIFS > 1 998 /* 999 * Group up with any other hwifs that share our irq(s). 1000 */ 1001 for (index = 0; index < MAX_HWIFS; index++) { 1002 ide_hwif_t *h = &ide_hwifs[index]; 1003 if (h->hwgroup) { /* scan only initialized hwif's */ 1004 if (hwif->irq == h->irq) { 1005 hwif->sharing_irq = h->sharing_irq = 1; 1006 if (hwif->chipset != ide_pci || 1007 h->chipset != ide_pci) { 1008 save_match(hwif, h, &match); 1009 } 1010 } 1011 if (hwif->serialized) { 1012 if (hwif->mate && hwif->mate->irq == h->irq) 1013 save_match(hwif, h, &match); 1014 } 1015 if (h->serialized) { 1016 if (h->mate && hwif->irq == h->mate->irq) 1017 save_match(hwif, h, &match); 1018 } 1019 } 1020 } 1021#endif /* MAX_HWIFS > 1 */ 1022 /* 1023 * If we are still without a hwgroup, then form a new one 1024 */ 1025 if (match) { 1026 hwgroup = match->hwgroup; 1027 hwif->hwgroup = hwgroup; 1028 /* 1029 * Link us into the hwgroup. 1030 * This must be done early, do ensure that unexpected_intr 1031 * can find the hwif and prevent irq storms. 1032 * No drives are attached to the new hwif, choose_drive 1033 * can't do anything stupid (yet). 1034 * Add ourself as the 2nd entry to the hwgroup->hwif 1035 * linked list, the first entry is the hwif that owns 1036 * hwgroup->handler - do not change that. 1037 */ 1038 spin_lock_irq(&ide_lock); 1039 hwif->next = hwgroup->hwif->next; 1040 hwgroup->hwif->next = hwif; 1041 BUG_ON(hwif->next == hwif); 1042 spin_unlock_irq(&ide_lock); 1043 } else { 1044 hwgroup = kmalloc_node(sizeof(*hwgroup), GFP_KERNEL|__GFP_ZERO, 1045 hwif_to_node(hwif)); 1046 if (hwgroup == NULL) 1047 goto out_up; 1048 1049 hwif->hwgroup = hwgroup; 1050 hwgroup->hwif = hwif->next = hwif; 1051 1052 init_timer(&hwgroup->timer); 1053 hwgroup->timer.function = &ide_timer_expiry; 1054 hwgroup->timer.data = (unsigned long) hwgroup; 1055 } 1056 1057 /* 1058 * Allocate the irq, if not already obtained for another hwif 1059 */ 1060 if (!match || match->irq != hwif->irq) { 1061 int sa = 0; 1062#if defined(__mc68000__) 1063 sa = IRQF_SHARED; 1064#endif /* __mc68000__ */ 1065 1066 if (IDE_CHIPSET_IS_PCI(hwif->chipset)) 1067 sa = IRQF_SHARED; 1068 1069 if (hwif->io_ports[IDE_CONTROL_OFFSET]) 1070 /* clear nIEN */ 1071 hwif->OUTB(0x08, hwif->io_ports[IDE_CONTROL_OFFSET]); 1072 1073 if (request_irq(hwif->irq,&ide_intr,sa,hwif->name,hwgroup)) 1074 goto out_unlink; 1075 } 1076 1077 if (!hwif->rqsize) { 1078 if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) || 1079 (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA)) 1080 hwif->rqsize = 256; 1081 else 1082 hwif->rqsize = 65536; 1083 } 1084 1085#if !defined(__mc68000__) 1086 printk("%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name, 1087 hwif->io_ports[IDE_DATA_OFFSET], 1088 hwif->io_ports[IDE_DATA_OFFSET]+7, 1089 hwif->io_ports[IDE_CONTROL_OFFSET], hwif->irq); 1090#else 1091 printk("%s at 0x%08lx on irq %d", hwif->name, 1092 hwif->io_ports[IDE_DATA_OFFSET], hwif->irq); 1093#endif /* __mc68000__ */ 1094 if (match) 1095 printk(" (%sed with %s)", 1096 hwif->sharing_irq ? "shar" : "serializ", match->name); 1097 printk("\n"); 1098 1099 mutex_unlock(&ide_cfg_mtx); 1100 return 0; 1101out_unlink: 1102 ide_remove_port_from_hwgroup(hwif); 1103out_up: 1104 mutex_unlock(&ide_cfg_mtx); 1105 return 1; 1106} 1107 1108static int ata_lock(dev_t dev, void *data) 1109{ 1110 /* FIXME: we want to pin hwif down */ 1111 return 0; 1112} 1113 1114static struct kobject *ata_probe(dev_t dev, int *part, void *data) 1115{ 1116 ide_hwif_t *hwif = data; 1117 int unit = *part >> PARTN_BITS; 1118 ide_drive_t *drive = &hwif->drives[unit]; 1119 if (!drive->present) 1120 return NULL; 1121 1122 if (drive->media == ide_disk) 1123 request_module("ide-disk"); 1124 if (drive->scsi) 1125 request_module("ide-scsi"); 1126 if (drive->media == ide_cdrom || drive->media == ide_optical) 1127 request_module("ide-cd"); 1128 if (drive->media == ide_tape) 1129 request_module("ide-tape"); 1130 if (drive->media == ide_floppy) 1131 request_module("ide-floppy"); 1132 1133 return NULL; 1134} 1135 1136static struct kobject *exact_match(dev_t dev, int *part, void *data) 1137{ 1138 struct gendisk *p = data; 1139 *part &= (1 << PARTN_BITS) - 1; 1140 return &p->dev.kobj; 1141} 1142 1143static int exact_lock(dev_t dev, void *data) 1144{ 1145 struct gendisk *p = data; 1146 1147 if (!get_disk(p)) 1148 return -1; 1149 return 0; 1150} 1151 1152void ide_register_region(struct gendisk *disk) 1153{ 1154 blk_register_region(MKDEV(disk->major, disk->first_minor), 1155 disk->minors, NULL, exact_match, exact_lock, disk); 1156} 1157 1158EXPORT_SYMBOL_GPL(ide_register_region); 1159 1160void ide_unregister_region(struct gendisk *disk) 1161{ 1162 blk_unregister_region(MKDEV(disk->major, disk->first_minor), 1163 disk->minors); 1164} 1165 1166EXPORT_SYMBOL_GPL(ide_unregister_region); 1167 1168void ide_init_disk(struct gendisk *disk, ide_drive_t *drive) 1169{ 1170 ide_hwif_t *hwif = drive->hwif; 1171 unsigned int unit = (drive->select.all >> 4) & 1; 1172 1173 disk->major = hwif->major; 1174 disk->first_minor = unit << PARTN_BITS; 1175 sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit); 1176 disk->queue = drive->queue; 1177} 1178 1179EXPORT_SYMBOL_GPL(ide_init_disk); 1180 1181static void ide_remove_drive_from_hwgroup(ide_drive_t *drive) 1182{ 1183 ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; 1184 1185 if (drive == drive->next) { 1186 /* special case: last drive from hwgroup. */ 1187 BUG_ON(hwgroup->drive != drive); 1188 hwgroup->drive = NULL; 1189 } else { 1190 ide_drive_t *walk; 1191 1192 walk = hwgroup->drive; 1193 while (walk->next != drive) 1194 walk = walk->next; 1195 walk->next = drive->next; 1196 if (hwgroup->drive == drive) { 1197 hwgroup->drive = drive->next; 1198 hwgroup->hwif = hwgroup->drive->hwif; 1199 } 1200 } 1201 BUG_ON(hwgroup->drive == drive); 1202} 1203 1204static void drive_release_dev (struct device *dev) 1205{ 1206 ide_drive_t *drive = container_of(dev, ide_drive_t, gendev); 1207 1208 ide_proc_unregister_device(drive); 1209 1210 spin_lock_irq(&ide_lock); 1211 ide_remove_drive_from_hwgroup(drive); 1212 kfree(drive->id); 1213 drive->id = NULL; 1214 drive->present = 0; 1215 /* Messed up locking ... */ 1216 spin_unlock_irq(&ide_lock); 1217 blk_cleanup_queue(drive->queue); 1218 spin_lock_irq(&ide_lock); 1219 drive->queue = NULL; 1220 spin_unlock_irq(&ide_lock); 1221 1222 complete(&drive->gendev_rel_comp); 1223} 1224 1225#ifndef ide_default_irq 1226#define ide_default_irq(irq) 0 1227#endif 1228 1229static int hwif_init(ide_hwif_t *hwif) 1230{ 1231 int old_irq; 1232 1233 if (!hwif->irq) { 1234 if (!(hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET]))) 1235 { 1236 printk("%s: DISABLED, NO IRQ\n", hwif->name); 1237 return 0; 1238 } 1239 } 1240 1241 if (register_blkdev(hwif->major, hwif->name)) 1242 return 0; 1243 1244 if (!hwif->sg_max_nents) 1245 hwif->sg_max_nents = PRD_ENTRIES; 1246 1247 hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents, 1248 GFP_KERNEL); 1249 if (!hwif->sg_table) { 1250 printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name); 1251 goto out; 1252 } 1253 1254 sg_init_table(hwif->sg_table, hwif->sg_max_nents); 1255 1256 if (init_irq(hwif) == 0) 1257 goto done; 1258 1259 old_irq = hwif->irq; 1260 /* 1261 * It failed to initialise. Find the default IRQ for 1262 * this port and try that. 1263 */ 1264 if (!(hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET]))) { 1265 printk("%s: Disabled unable to get IRQ %d.\n", 1266 hwif->name, old_irq); 1267 goto out; 1268 } 1269 if (init_irq(hwif)) { 1270 printk("%s: probed IRQ %d and default IRQ %d failed.\n", 1271 hwif->name, old_irq, hwif->irq); 1272 goto out; 1273 } 1274 printk("%s: probed IRQ %d failed, using default.\n", 1275 hwif->name, hwif->irq); 1276 1277done: 1278 blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS, 1279 THIS_MODULE, ata_probe, ata_lock, hwif); 1280 return 1; 1281 1282out: 1283 unregister_blkdev(hwif->major, hwif->name); 1284 return 0; 1285} 1286 1287static void hwif_register_devices(ide_hwif_t *hwif) 1288{ 1289 unsigned int i; 1290 1291 for (i = 0; i < MAX_DRIVES; i++) { 1292 ide_drive_t *drive = &hwif->drives[i]; 1293 struct device *dev = &drive->gendev; 1294 int ret; 1295 1296 if (!drive->present) 1297 continue; 1298 1299 ide_add_generic_settings(drive); 1300 1301 snprintf(dev->bus_id, BUS_ID_SIZE, "%u.%u", hwif->index, i); 1302 dev->parent = &hwif->gendev; 1303 dev->bus = &ide_bus_type; 1304 dev->driver_data = drive; 1305 dev->release = drive_release_dev; 1306 1307 ret = device_register(dev); 1308 if (ret < 0) 1309 printk(KERN_WARNING "IDE: %s: device_register error: " 1310 "%d\n", __func__, ret); 1311 } 1312} 1313 1314static void ide_port_init_devices(ide_hwif_t *hwif) 1315{ 1316 const struct ide_port_ops *port_ops = hwif->port_ops; 1317 int i; 1318 1319 for (i = 0; i < MAX_DRIVES; i++) { 1320 ide_drive_t *drive = &hwif->drives[i]; 1321 1322 if (hwif->host_flags & IDE_HFLAG_IO_32BIT) 1323 drive->io_32bit = 1; 1324 if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS) 1325 drive->unmask = 1; 1326 if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS) 1327 drive->no_unmask = 1; 1328 drive->autotune = 1; 1329 } 1330 1331 if (port_ops && port_ops->port_init_devs) 1332 port_ops->port_init_devs(hwif); 1333} 1334 1335static void ide_init_port(ide_hwif_t *hwif, unsigned int port, 1336 const struct ide_port_info *d) 1337{ 1338 if (d->chipset != ide_etrax100) 1339 hwif->channel = port; 1340 1341 if (d->chipset) 1342 hwif->chipset = d->chipset; 1343 1344 if (d->init_iops) 1345 d->init_iops(hwif); 1346 1347 if ((!hwif->irq && (d->host_flags & IDE_HFLAG_LEGACY_IRQS)) || 1348 (d->host_flags & IDE_HFLAG_FORCE_LEGACY_IRQS)) 1349 hwif->irq = port ? 15 : 14; 1350 1351 hwif->host_flags = d->host_flags; 1352 hwif->pio_mask = d->pio_mask; 1353 1354 /* ->set_pio_mode for DTC2278 is currently limited to port 0 */ 1355 if (hwif->chipset != ide_dtc2278 || hwif->channel == 0) 1356 hwif->port_ops = d->port_ops; 1357 1358 if ((d->host_flags & IDE_HFLAG_SERIALIZE) || 1359 ((d->host_flags & IDE_HFLAG_SERIALIZE_DMA) && hwif->dma_base)) { 1360 if (hwif->mate) 1361 hwif->mate->serialized = hwif->serialized = 1; 1362 } 1363 1364 hwif->swdma_mask = d->swdma_mask; 1365 hwif->mwdma_mask = d->mwdma_mask; 1366 hwif->ultra_mask = d->udma_mask; 1367 1368 if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) { 1369 int rc; 1370 1371 if (d->init_dma) 1372 rc = d->init_dma(hwif, d); 1373 else 1374 rc = ide_hwif_setup_dma(hwif, d); 1375 1376 if (rc < 0) { 1377 printk(KERN_INFO "%s: DMA disabled\n", hwif->name); 1378 hwif->swdma_mask = 0; 1379 hwif->mwdma_mask = 0; 1380 hwif->ultra_mask = 0; 1381 } else if (d->dma_ops) 1382 hwif->dma_ops = d->dma_ops; 1383 } 1384 1385 if (d->host_flags & IDE_HFLAG_RQSIZE_256) 1386 hwif->rqsize = 256; 1387 1388 /* call chipset specific routine for each enabled port */ 1389 if (d->init_hwif) 1390 d->init_hwif(hwif); 1391} 1392 1393static void ide_port_cable_detect(ide_hwif_t *hwif) 1394{ 1395 const struct ide_port_ops *port_ops = hwif->port_ops; 1396 1397 if (port_ops && port_ops->cable_detect && (hwif->ultra_mask & 0x78)) { 1398 if (hwif->cbl != ATA_CBL_PATA40_SHORT) 1399 hwif->cbl = port_ops->cable_detect(hwif); 1400 } 1401} 1402 1403static ssize_t store_delete_devices(struct device *portdev, 1404 struct device_attribute *attr, 1405 const char *buf, size_t n) 1406{ 1407 ide_hwif_t *hwif = dev_get_drvdata(portdev); 1408 1409 if (strncmp(buf, "1", n)) 1410 return -EINVAL; 1411 1412 ide_port_unregister_devices(hwif); 1413 1414 return n; 1415}; 1416 1417static DEVICE_ATTR(delete_devices, S_IWUSR, NULL, store_delete_devices); 1418 1419static ssize_t store_scan(struct device *portdev, 1420 struct device_attribute *attr, 1421 const char *buf, size_t n) 1422{ 1423 ide_hwif_t *hwif = dev_get_drvdata(portdev); 1424 1425 if (strncmp(buf, "1", n)) 1426 return -EINVAL; 1427 1428 ide_port_unregister_devices(hwif); 1429 ide_port_scan(hwif); 1430 1431 return n; 1432}; 1433 1434static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan); 1435 1436static struct device_attribute *ide_port_attrs[] = { 1437 &dev_attr_delete_devices, 1438 &dev_attr_scan, 1439 NULL 1440}; 1441 1442static int ide_sysfs_register_port(ide_hwif_t *hwif) 1443{ 1444 int i, rc; 1445 1446 for (i = 0; ide_port_attrs[i]; i++) { 1447 rc = device_create_file(hwif->portdev, ide_port_attrs[i]); 1448 if (rc) 1449 break; 1450 } 1451 1452 return rc; 1453} 1454 1455/** 1456 * ide_find_port_slot - find free ide_hwifs[] slot 1457 * @d: IDE port info 1458 * 1459 * Return the new hwif. If we are out of free slots return NULL. 1460 */ 1461 1462ide_hwif_t *ide_find_port_slot(const struct ide_port_info *d) 1463{ 1464 ide_hwif_t *hwif; 1465 int i; 1466 u8 bootable = (d && (d->host_flags & IDE_HFLAG_NON_BOOTABLE)) ? 0 : 1; 1467 1468 /* 1469 * Claim an unassigned slot. 1470 * 1471 * Give preference to claiming other slots before claiming ide0/ide1, 1472 * just in case there's another interface yet-to-be-scanned 1473 * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults). 1474 * 1475 * Unless there is a bootable card that does not use the standard 1476 * ports 0x1f0/0x170 (the ide0/ide1 defaults). 1477 */ 1478 if (bootable) { 1479 i = (d && (d->host_flags & IDE_HFLAG_QD_2ND_PORT)) ? 1 : 0; 1480 1481 for (; i < MAX_HWIFS; i++) { 1482 hwif = &ide_hwifs[i]; 1483 if (hwif->chipset == ide_unknown) 1484 return hwif; 1485 } 1486 } else { 1487 for (i = 2; i < MAX_HWIFS; i++) { 1488 hwif = &ide_hwifs[i]; 1489 if (hwif->chipset == ide_unknown) 1490 return hwif; 1491 } 1492 for (i = 0; i < 2 && i < MAX_HWIFS; i++) { 1493 hwif = &ide_hwifs[i]; 1494 if (hwif->chipset == ide_unknown) 1495 return hwif; 1496 } 1497 } 1498 1499 return NULL; 1500} 1501EXPORT_SYMBOL_GPL(ide_find_port_slot); 1502 1503int ide_device_add_all(u8 *idx, const struct ide_port_info *d) 1504{ 1505 ide_hwif_t *hwif, *mate = NULL; 1506 int i, rc = 0; 1507 1508 for (i = 0; i < MAX_HWIFS; i++) { 1509 if (idx[i] == 0xff) { 1510 mate = NULL; 1511 continue; 1512 } 1513 1514 hwif = &ide_hwifs[idx[i]]; 1515 1516 ide_port_apply_params(hwif); 1517 1518 if (d == NULL) { 1519 mate = NULL; 1520 continue; 1521 } 1522 1523 if (d->chipset != ide_etrax100 && (i & 1) && mate) { 1524 hwif->mate = mate; 1525 mate->mate = hwif; 1526 } 1527 1528 mate = (i & 1) ? NULL : hwif; 1529 1530 ide_init_port(hwif, i & 1, d); 1531 ide_port_cable_detect(hwif); 1532 ide_port_init_devices(hwif); 1533 } 1534 1535 for (i = 0; i < MAX_HWIFS; i++) { 1536 if (idx[i] == 0xff) 1537 continue; 1538 1539 hwif = &ide_hwifs[idx[i]]; 1540 1541 if (ide_probe_port(hwif) == 0) 1542 hwif->present = 1; 1543 1544 if (hwif->chipset != ide_4drives || !hwif->mate || 1545 !hwif->mate->present) 1546 ide_register_port(hwif); 1547 1548 if (hwif->present) 1549 ide_port_tune_devices(hwif); 1550 } 1551 1552 for (i = 0; i < MAX_HWIFS; i++) { 1553 if (idx[i] == 0xff) 1554 continue; 1555 1556 hwif = &ide_hwifs[idx[i]]; 1557 1558 if (hwif_init(hwif) == 0) { 1559 printk(KERN_INFO "%s: failed to initialize IDE " 1560 "interface\n", hwif->name); 1561 hwif->present = 0; 1562 rc = -1; 1563 continue; 1564 } 1565 1566 if (hwif->present) 1567 ide_port_setup_devices(hwif); 1568 1569 ide_acpi_init(hwif); 1570 1571 if (hwif->present) 1572 ide_acpi_port_init_devices(hwif); 1573 } 1574 1575 for (i = 0; i < MAX_HWIFS; i++) { 1576 if (idx[i] == 0xff) 1577 continue; 1578 1579 hwif = &ide_hwifs[idx[i]]; 1580 1581 if (hwif->chipset == ide_unknown) 1582 hwif->chipset = ide_generic; 1583 1584 if (hwif->present) 1585 hwif_register_devices(hwif); 1586 } 1587 1588 for (i = 0; i < MAX_HWIFS; i++) { 1589 if (idx[i] == 0xff) 1590 continue; 1591 1592 hwif = &ide_hwifs[idx[i]]; 1593 1594 ide_sysfs_register_port(hwif); 1595 ide_proc_register_port(hwif); 1596 1597 if (hwif->present) 1598 ide_proc_port_register_devices(hwif); 1599 } 1600 1601 return rc; 1602} 1603EXPORT_SYMBOL_GPL(ide_device_add_all); 1604 1605int ide_device_add(u8 idx[4], const struct ide_port_info *d) 1606{ 1607 u8 idx_all[MAX_HWIFS]; 1608 int i; 1609 1610 for (i = 0; i < MAX_HWIFS; i++) 1611 idx_all[i] = (i < 4) ? idx[i] : 0xff; 1612 1613 return ide_device_add_all(idx_all, d); 1614} 1615EXPORT_SYMBOL_GPL(ide_device_add); 1616 1617void ide_port_scan(ide_hwif_t *hwif) 1618{ 1619 ide_port_apply_params(hwif); 1620 ide_port_cable_detect(hwif); 1621 ide_port_init_devices(hwif); 1622 1623 if (ide_probe_port(hwif) < 0) 1624 return; 1625 1626 hwif->present = 1; 1627 1628 ide_port_tune_devices(hwif); 1629 ide_acpi_port_init_devices(hwif); 1630 ide_port_setup_devices(hwif); 1631 hwif_register_devices(hwif); 1632 ide_proc_port_register_devices(hwif); 1633} 1634EXPORT_SYMBOL_GPL(ide_port_scan); 1635 1636static void ide_legacy_init_one(u8 *idx, hw_regs_t *hw, u8 port_no, 1637 const struct ide_port_info *d, 1638 unsigned long config) 1639{ 1640 ide_hwif_t *hwif; 1641 unsigned long base, ctl; 1642 int irq; 1643 1644 if (port_no == 0) { 1645 base = 0x1f0; 1646 ctl = 0x3f6; 1647 irq = 14; 1648 } else { 1649 base = 0x170; 1650 ctl = 0x376; 1651 irq = 15; 1652 } 1653 1654 if (!request_region(base, 8, d->name)) { 1655 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n", 1656 d->name, base, base + 7); 1657 return; 1658 } 1659 1660 if (!request_region(ctl, 1, d->name)) { 1661 printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n", 1662 d->name, ctl); 1663 release_region(base, 8); 1664 return; 1665 } 1666 1667 ide_std_init_ports(hw, base, ctl); 1668 hw->irq = irq; 1669 1670 hwif = ide_find_port_slot(d); 1671 if (hwif) { 1672 ide_init_port_hw(hwif, hw); 1673 if (config) 1674 hwif->config_data = config; 1675 idx[port_no] = hwif->index; 1676 } 1677} 1678 1679int ide_legacy_device_add(const struct ide_port_info *d, unsigned long config) 1680{ 1681 u8 idx[4] = { 0xff, 0xff, 0xff, 0xff }; 1682 hw_regs_t hw[2]; 1683 1684 memset(&hw, 0, sizeof(hw)); 1685 1686 if ((d->host_flags & IDE_HFLAG_QD_2ND_PORT) == 0) 1687 ide_legacy_init_one(idx, &hw[0], 0, d, config); 1688 ide_legacy_init_one(idx, &hw[1], 1, d, config); 1689 1690 if (idx[0] == 0xff && idx[1] == 0xff && 1691 (d->host_flags & IDE_HFLAG_SINGLE)) 1692 return -ENOENT; 1693 1694 ide_device_add(idx, d); 1695 1696 return 0; 1697} 1698EXPORT_SYMBOL_GPL(ide_legacy_device_add); 1699