ide-probe.c revision 9a0e77f28b50128df0c9e26ae489e44e29a7270a
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 (IDE_CONTROL_REG) { 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, IDE_FEATURE_REG); 293 294 /* ask drive for ID */ 295 hwif->OUTB(cmd, IDE_COMMAND_REG); 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 (IDE_CONTROL_REG) { 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(IDE_SELECT_REG) != drive->select.all && !drive->present) { 449 if (drive->select.b.unit != 0) { 450 /* exit with drive0 selected */ 451 SELECT_DRIVE(&hwif->drives[0]); 452 /* allow BUSY_STAT to assert & clear */ 453 msleep(50); 454 } 455 /* no i/f present: mmm.. this should be a 4 -ml */ 456 return 3; 457 } 458 459 stat = ide_read_status(drive); 460 461 if (OK_STAT(stat, READY_STAT, BUSY_STAT) || 462 drive->present || cmd == WIN_PIDENTIFY) { 463 /* send cmd and wait */ 464 if ((rc = try_to_identify(drive, cmd))) { 465 /* failed: try again */ 466 rc = try_to_identify(drive,cmd); 467 } 468 469 stat = ide_read_status(drive); 470 471 if (stat == (BUSY_STAT | READY_STAT)) 472 return 4; 473 474 if ((rc == 1 && cmd == WIN_PIDENTIFY) && 475 ((drive->autotune == IDE_TUNE_DEFAULT) || 476 (drive->autotune == IDE_TUNE_AUTO))) { 477 printk(KERN_ERR "%s: no response (status = 0x%02x), " 478 "resetting drive\n", drive->name, stat); 479 msleep(50); 480 hwif->OUTB(drive->select.all, IDE_SELECT_REG); 481 msleep(50); 482 hwif->OUTB(WIN_SRST, IDE_COMMAND_REG); 483 (void)ide_busy_sleep(hwif); 484 rc = try_to_identify(drive, cmd); 485 } 486 487 /* ensure drive IRQ is clear */ 488 stat = ide_read_status(drive); 489 490 if (rc == 1) 491 printk(KERN_ERR "%s: no response (status = 0x%02x)\n", 492 drive->name, stat); 493 } else { 494 /* not present or maybe ATAPI */ 495 rc = 3; 496 } 497 if (drive->select.b.unit != 0) { 498 /* exit with drive0 selected */ 499 SELECT_DRIVE(&hwif->drives[0]); 500 msleep(50); 501 /* ensure drive irq is clear */ 502 (void)ide_read_status(drive); 503 } 504 return rc; 505} 506 507/* 508 * 509 */ 510static void enable_nest (ide_drive_t *drive) 511{ 512 ide_hwif_t *hwif = HWIF(drive); 513 u8 stat; 514 515 printk("%s: enabling %s -- ", hwif->name, drive->id->model); 516 SELECT_DRIVE(drive); 517 msleep(50); 518 hwif->OUTB(EXABYTE_ENABLE_NEST, IDE_COMMAND_REG); 519 520 if (ide_busy_sleep(hwif)) { 521 printk(KERN_CONT "failed (timeout)\n"); 522 return; 523 } 524 525 msleep(50); 526 527 stat = ide_read_status(drive); 528 529 if (!OK_STAT(stat, 0, BAD_STAT)) 530 printk(KERN_CONT "failed (status = 0x%02x)\n", stat); 531 else 532 printk(KERN_CONT "success\n"); 533 534 /* if !(success||timed-out) */ 535 if (do_probe(drive, WIN_IDENTIFY) >= 2) { 536 /* look for ATAPI device */ 537 (void) do_probe(drive, WIN_PIDENTIFY); 538 } 539} 540 541/** 542 * probe_for_drives - upper level drive probe 543 * @drive: drive to probe for 544 * 545 * probe_for_drive() tests for existence of a given drive using do_probe() 546 * and presents things to the user as needed. 547 * 548 * Returns: 0 no device was found 549 * 1 device was found (note: drive->present might 550 * still be 0) 551 */ 552 553static inline u8 probe_for_drive (ide_drive_t *drive) 554{ 555 /* 556 * In order to keep things simple we have an id 557 * block for all drives at all times. If the device 558 * is pre ATA or refuses ATA/ATAPI identify we 559 * will add faked data to this. 560 * 561 * Also note that 0 everywhere means "can't do X" 562 */ 563 564 drive->id = kzalloc(SECTOR_WORDS *4, GFP_KERNEL); 565 drive->id_read = 0; 566 if(drive->id == NULL) 567 { 568 printk(KERN_ERR "ide: out of memory for id data.\n"); 569 return 0; 570 } 571 strcpy(drive->id->model, "UNKNOWN"); 572 573 /* skip probing? */ 574 if (!drive->noprobe) 575 { 576 /* if !(success||timed-out) */ 577 if (do_probe(drive, WIN_IDENTIFY) >= 2) { 578 /* look for ATAPI device */ 579 (void) do_probe(drive, WIN_PIDENTIFY); 580 } 581 if (!drive->present) 582 /* drive not found */ 583 return 0; 584 if (strstr(drive->id->model, "E X A B Y T E N E S T")) 585 enable_nest(drive); 586 587 /* identification failed? */ 588 if (!drive->id_read) { 589 if (drive->media == ide_disk) { 590 printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n", 591 drive->name, drive->cyl, 592 drive->head, drive->sect); 593 } else if (drive->media == ide_cdrom) { 594 printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name); 595 } else { 596 /* nuke it */ 597 printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name); 598 drive->present = 0; 599 } 600 } 601 /* drive was found */ 602 } 603 if(!drive->present) 604 return 0; 605 /* The drive wasn't being helpful. Add generic info only */ 606 if (drive->id_read == 0) { 607 generic_id(drive); 608 return 1; 609 } 610 611 if (drive->media == ide_disk) { 612 ide_disk_init_chs(drive); 613 ide_disk_init_mult_count(drive); 614 } 615 616 return drive->present; 617} 618 619static void hwif_release_dev (struct device *dev) 620{ 621 ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev); 622 623 complete(&hwif->gendev_rel_comp); 624} 625 626static int ide_register_port(ide_hwif_t *hwif) 627{ 628 int ret; 629 630 /* register with global device tree */ 631 strlcpy(hwif->gendev.bus_id,hwif->name,BUS_ID_SIZE); 632 hwif->gendev.driver_data = hwif; 633 if (hwif->gendev.parent == NULL) { 634 if (hwif->dev) 635 hwif->gendev.parent = hwif->dev; 636 else 637 /* Would like to do = &device_legacy */ 638 hwif->gendev.parent = NULL; 639 } 640 hwif->gendev.release = hwif_release_dev; 641 ret = device_register(&hwif->gendev); 642 if (ret < 0) { 643 printk(KERN_WARNING "IDE: %s: device_register error: %d\n", 644 __FUNCTION__, ret); 645 goto out; 646 } 647 648 get_device(&hwif->gendev); 649 650 hwif->portdev = device_create(ide_port_class, &hwif->gendev, 651 MKDEV(0, 0), hwif->name); 652 if (IS_ERR(hwif->portdev)) { 653 ret = PTR_ERR(hwif->portdev); 654 device_unregister(&hwif->gendev); 655 } 656 dev_set_drvdata(hwif->portdev, hwif); 657out: 658 return ret; 659} 660 661/** 662 * ide_port_wait_ready - wait for port to become ready 663 * @hwif: IDE port 664 * 665 * This is needed on some PPCs and a bunch of BIOS-less embedded 666 * platforms. Typical cases are: 667 * 668 * - The firmware hard reset the disk before booting the kernel, 669 * the drive is still doing it's poweron-reset sequence, that 670 * can take up to 30 seconds. 671 * 672 * - The firmware does nothing (or no firmware), the device is 673 * still in POST state (same as above actually). 674 * 675 * - Some CD/DVD/Writer combo drives tend to drive the bus during 676 * their reset sequence even when they are non-selected slave 677 * devices, thus preventing discovery of the main HD. 678 * 679 * Doing this wait-for-non-busy should not harm any existing 680 * configuration and fix some issues like the above. 681 * 682 * BenH. 683 * 684 * Returns 0 on success, error code (< 0) otherwise. 685 */ 686 687static int ide_port_wait_ready(ide_hwif_t *hwif) 688{ 689 int unit, rc; 690 691 printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name); 692 693 /* Let HW settle down a bit from whatever init state we 694 * come from */ 695 mdelay(2); 696 697 /* Wait for BSY bit to go away, spec timeout is 30 seconds, 698 * I know of at least one disk who takes 31 seconds, I use 35 699 * here to be safe 700 */ 701 rc = ide_wait_not_busy(hwif, 35000); 702 if (rc) 703 return rc; 704 705 /* Now make sure both master & slave are ready */ 706 for (unit = 0; unit < MAX_DRIVES; unit++) { 707 ide_drive_t *drive = &hwif->drives[unit]; 708 709 /* Ignore disks that we will not probe for later. */ 710 if (!drive->noprobe || drive->present) { 711 SELECT_DRIVE(drive); 712 ide_set_irq(drive, 1); 713 mdelay(2); 714 rc = ide_wait_not_busy(hwif, 35000); 715 if (rc) 716 goto out; 717 } else 718 printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n", 719 drive->name); 720 } 721out: 722 /* Exit function with master reselected (let's be sane) */ 723 if (unit) 724 SELECT_DRIVE(&hwif->drives[0]); 725 726 return rc; 727} 728 729/** 730 * ide_undecoded_slave - look for bad CF adapters 731 * @drive1: drive 732 * 733 * Analyse the drives on the interface and attempt to decide if we 734 * have the same drive viewed twice. This occurs with crap CF adapters 735 * and PCMCIA sometimes. 736 */ 737 738void ide_undecoded_slave(ide_drive_t *drive1) 739{ 740 ide_drive_t *drive0 = &drive1->hwif->drives[0]; 741 742 if ((drive1->dn & 1) == 0 || drive0->present == 0) 743 return; 744 745 /* If the models don't match they are not the same product */ 746 if (strcmp(drive0->id->model, drive1->id->model)) 747 return; 748 749 /* Serial numbers do not match */ 750 if (strncmp(drive0->id->serial_no, drive1->id->serial_no, 20)) 751 return; 752 753 /* No serial number, thankfully very rare for CF */ 754 if (drive0->id->serial_no[0] == 0) 755 return; 756 757 /* Appears to be an IDE flash adapter with decode bugs */ 758 printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n"); 759 760 drive1->present = 0; 761} 762 763EXPORT_SYMBOL_GPL(ide_undecoded_slave); 764 765static int ide_probe_port(ide_hwif_t *hwif) 766{ 767 unsigned long flags; 768 unsigned int irqd; 769 int unit, rc = -ENODEV; 770 771 BUG_ON(hwif->present); 772 773 if (hwif->noprobe || 774 (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 if (hwif->io_ports[IDE_CONTROL_OFFSET] && hwif->reset) { 802 printk(KERN_WARNING "%s: reset\n", hwif->name); 803 hwif->OUTB(12, hwif->io_ports[IDE_CONTROL_OFFSET]); 804 udelay(10); 805 hwif->OUTB(8, hwif->io_ports[IDE_CONTROL_OFFSET]); 806 (void)ide_busy_sleep(hwif); 807 } 808 local_irq_restore(flags); 809 /* 810 * Use cached IRQ number. It might be (and is...) changed by probe 811 * code above 812 */ 813 if (irqd) 814 enable_irq(irqd); 815 816 return rc; 817} 818 819static void ide_port_tune_devices(ide_hwif_t *hwif) 820{ 821 int unit; 822 823 for (unit = 0; unit < MAX_DRIVES; unit++) { 824 ide_drive_t *drive = &hwif->drives[unit]; 825 826 if (drive->present && hwif->quirkproc) 827 hwif->quirkproc(drive); 828 } 829 830 for (unit = 0; unit < MAX_DRIVES; ++unit) { 831 ide_drive_t *drive = &hwif->drives[unit]; 832 833 if (drive->present) { 834 if (drive->autotune == IDE_TUNE_AUTO) 835 ide_set_max_pio(drive); 836 837 if (drive->autotune != IDE_TUNE_DEFAULT && 838 drive->autotune != IDE_TUNE_AUTO) 839 continue; 840 841 drive->nice1 = 1; 842 843 if (hwif->dma_host_set) 844 ide_set_dma(drive); 845 } 846 } 847 848 for (unit = 0; unit < MAX_DRIVES; ++unit) { 849 ide_drive_t *drive = &hwif->drives[unit]; 850 851 if (hwif->host_flags & IDE_HFLAG_NO_IO_32BIT) 852 drive->no_io_32bit = 1; 853 else 854 drive->no_io_32bit = drive->id->dword_io ? 1 : 0; 855 } 856} 857 858#if MAX_HWIFS > 1 859/* 860 * save_match() is used to simplify logic in init_irq() below. 861 * 862 * A loophole here is that we may not know about a particular 863 * hwif's irq until after that hwif is actually probed/initialized.. 864 * This could be a problem for the case where an hwif is on a 865 * dual interface that requires serialization (eg. cmd640) and another 866 * hwif using one of the same irqs is initialized beforehand. 867 * 868 * This routine detects and reports such situations, but does not fix them. 869 */ 870static void save_match(ide_hwif_t *hwif, ide_hwif_t *new, ide_hwif_t **match) 871{ 872 ide_hwif_t *m = *match; 873 874 if (m && m->hwgroup && m->hwgroup != new->hwgroup) { 875 if (!new->hwgroup) 876 return; 877 printk("%s: potential irq problem with %s and %s\n", 878 hwif->name, new->name, m->name); 879 } 880 if (!m || m->irq != hwif->irq) /* don't undo a prior perfect match */ 881 *match = new; 882} 883#endif /* MAX_HWIFS > 1 */ 884 885/* 886 * init request queue 887 */ 888static int ide_init_queue(ide_drive_t *drive) 889{ 890 struct request_queue *q; 891 ide_hwif_t *hwif = HWIF(drive); 892 int max_sectors = 256; 893 int max_sg_entries = PRD_ENTRIES; 894 895 /* 896 * Our default set up assumes the normal IDE case, 897 * that is 64K segmenting, standard PRD setup 898 * and LBA28. Some drivers then impose their own 899 * limits and LBA48 we could raise it but as yet 900 * do not. 901 */ 902 903 q = blk_init_queue_node(do_ide_request, &ide_lock, hwif_to_node(hwif)); 904 if (!q) 905 return 1; 906 907 q->queuedata = drive; 908 blk_queue_segment_boundary(q, 0xffff); 909 910 if (hwif->rqsize < max_sectors) 911 max_sectors = hwif->rqsize; 912 blk_queue_max_sectors(q, max_sectors); 913 914#ifdef CONFIG_PCI 915 /* When we have an IOMMU, we may have a problem where pci_map_sg() 916 * creates segments that don't completely match our boundary 917 * requirements and thus need to be broken up again. Because it 918 * doesn't align properly either, we may actually have to break up 919 * to more segments than what was we got in the first place, a max 920 * worst case is twice as many. 921 * This will be fixed once we teach pci_map_sg() about our boundary 922 * requirements, hopefully soon. *FIXME* 923 */ 924 if (!PCI_DMA_BUS_IS_PHYS) 925 max_sg_entries >>= 1; 926#endif /* CONFIG_PCI */ 927 928 blk_queue_max_hw_segments(q, max_sg_entries); 929 blk_queue_max_phys_segments(q, max_sg_entries); 930 931 /* assign drive queue */ 932 drive->queue = q; 933 934 /* needs drive->queue to be set */ 935 ide_toggle_bounce(drive, 1); 936 937 return 0; 938} 939 940static void ide_add_drive_to_hwgroup(ide_drive_t *drive) 941{ 942 ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; 943 944 spin_lock_irq(&ide_lock); 945 if (!hwgroup->drive) { 946 /* first drive for hwgroup. */ 947 drive->next = drive; 948 hwgroup->drive = drive; 949 hwgroup->hwif = HWIF(hwgroup->drive); 950 } else { 951 drive->next = hwgroup->drive->next; 952 hwgroup->drive->next = drive; 953 } 954 spin_unlock_irq(&ide_lock); 955} 956 957/* 958 * For any present drive: 959 * - allocate the block device queue 960 * - link drive into the hwgroup 961 */ 962static void ide_port_setup_devices(ide_hwif_t *hwif) 963{ 964 int i; 965 966 mutex_lock(&ide_cfg_mtx); 967 for (i = 0; i < MAX_DRIVES; i++) { 968 ide_drive_t *drive = &hwif->drives[i]; 969 970 if (!drive->present) 971 continue; 972 973 if (ide_init_queue(drive)) { 974 printk(KERN_ERR "ide: failed to init %s\n", 975 drive->name); 976 continue; 977 } 978 979 ide_add_drive_to_hwgroup(drive); 980 } 981 mutex_unlock(&ide_cfg_mtx); 982} 983 984/* 985 * This routine sets up the irq for an ide interface, and creates a new 986 * hwgroup for the irq/hwif if none was previously assigned. 987 * 988 * Much of the code is for correctly detecting/handling irq sharing 989 * and irq serialization situations. This is somewhat complex because 990 * it handles static as well as dynamic (PCMCIA) IDE interfaces. 991 */ 992static int init_irq (ide_hwif_t *hwif) 993{ 994 unsigned int index; 995 ide_hwgroup_t *hwgroup; 996 ide_hwif_t *match = NULL; 997 998 999 BUG_ON(in_interrupt()); 1000 BUG_ON(irqs_disabled()); 1001 BUG_ON(hwif == NULL); 1002 1003 mutex_lock(&ide_cfg_mtx); 1004 hwif->hwgroup = NULL; 1005#if MAX_HWIFS > 1 1006 /* 1007 * Group up with any other hwifs that share our irq(s). 1008 */ 1009 for (index = 0; index < MAX_HWIFS; index++) { 1010 ide_hwif_t *h = &ide_hwifs[index]; 1011 if (h->hwgroup) { /* scan only initialized hwif's */ 1012 if (hwif->irq == h->irq) { 1013 hwif->sharing_irq = h->sharing_irq = 1; 1014 if (hwif->chipset != ide_pci || 1015 h->chipset != ide_pci) { 1016 save_match(hwif, h, &match); 1017 } 1018 } 1019 if (hwif->serialized) { 1020 if (hwif->mate && hwif->mate->irq == h->irq) 1021 save_match(hwif, h, &match); 1022 } 1023 if (h->serialized) { 1024 if (h->mate && hwif->irq == h->mate->irq) 1025 save_match(hwif, h, &match); 1026 } 1027 } 1028 } 1029#endif /* MAX_HWIFS > 1 */ 1030 /* 1031 * If we are still without a hwgroup, then form a new one 1032 */ 1033 if (match) { 1034 hwgroup = match->hwgroup; 1035 hwif->hwgroup = hwgroup; 1036 /* 1037 * Link us into the hwgroup. 1038 * This must be done early, do ensure that unexpected_intr 1039 * can find the hwif and prevent irq storms. 1040 * No drives are attached to the new hwif, choose_drive 1041 * can't do anything stupid (yet). 1042 * Add ourself as the 2nd entry to the hwgroup->hwif 1043 * linked list, the first entry is the hwif that owns 1044 * hwgroup->handler - do not change that. 1045 */ 1046 spin_lock_irq(&ide_lock); 1047 hwif->next = hwgroup->hwif->next; 1048 hwgroup->hwif->next = hwif; 1049 BUG_ON(hwif->next == hwif); 1050 spin_unlock_irq(&ide_lock); 1051 } else { 1052 hwgroup = kmalloc_node(sizeof(*hwgroup), GFP_KERNEL|__GFP_ZERO, 1053 hwif_to_node(hwif)); 1054 if (hwgroup == NULL) 1055 goto out_up; 1056 1057 hwif->hwgroup = hwgroup; 1058 hwgroup->hwif = hwif->next = hwif; 1059 1060 init_timer(&hwgroup->timer); 1061 hwgroup->timer.function = &ide_timer_expiry; 1062 hwgroup->timer.data = (unsigned long) hwgroup; 1063 } 1064 1065 /* 1066 * Allocate the irq, if not already obtained for another hwif 1067 */ 1068 if (!match || match->irq != hwif->irq) { 1069 int sa = 0; 1070#if defined(__mc68000__) 1071 sa = IRQF_SHARED; 1072#endif /* __mc68000__ */ 1073 1074 if (IDE_CHIPSET_IS_PCI(hwif->chipset)) 1075 sa = IRQF_SHARED; 1076 1077 if (hwif->io_ports[IDE_CONTROL_OFFSET]) 1078 /* clear nIEN */ 1079 hwif->OUTB(0x08, hwif->io_ports[IDE_CONTROL_OFFSET]); 1080 1081 if (request_irq(hwif->irq,&ide_intr,sa,hwif->name,hwgroup)) 1082 goto out_unlink; 1083 } 1084 1085 if (!hwif->rqsize) { 1086 if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) || 1087 (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA)) 1088 hwif->rqsize = 256; 1089 else 1090 hwif->rqsize = 65536; 1091 } 1092 1093#if !defined(__mc68000__) 1094 printk("%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name, 1095 hwif->io_ports[IDE_DATA_OFFSET], 1096 hwif->io_ports[IDE_DATA_OFFSET]+7, 1097 hwif->io_ports[IDE_CONTROL_OFFSET], hwif->irq); 1098#else 1099 printk("%s at 0x%08lx on irq %d", hwif->name, 1100 hwif->io_ports[IDE_DATA_OFFSET], hwif->irq); 1101#endif /* __mc68000__ */ 1102 if (match) 1103 printk(" (%sed with %s)", 1104 hwif->sharing_irq ? "shar" : "serializ", match->name); 1105 printk("\n"); 1106 1107 mutex_unlock(&ide_cfg_mtx); 1108 return 0; 1109out_unlink: 1110 ide_remove_port_from_hwgroup(hwif); 1111out_up: 1112 mutex_unlock(&ide_cfg_mtx); 1113 return 1; 1114} 1115 1116static int ata_lock(dev_t dev, void *data) 1117{ 1118 /* FIXME: we want to pin hwif down */ 1119 return 0; 1120} 1121 1122static struct kobject *ata_probe(dev_t dev, int *part, void *data) 1123{ 1124 ide_hwif_t *hwif = data; 1125 int unit = *part >> PARTN_BITS; 1126 ide_drive_t *drive = &hwif->drives[unit]; 1127 if (!drive->present) 1128 return NULL; 1129 1130 if (drive->media == ide_disk) 1131 request_module("ide-disk"); 1132 if (drive->scsi) 1133 request_module("ide-scsi"); 1134 if (drive->media == ide_cdrom || drive->media == ide_optical) 1135 request_module("ide-cd"); 1136 if (drive->media == ide_tape) 1137 request_module("ide-tape"); 1138 if (drive->media == ide_floppy) 1139 request_module("ide-floppy"); 1140 1141 return NULL; 1142} 1143 1144static struct kobject *exact_match(dev_t dev, int *part, void *data) 1145{ 1146 struct gendisk *p = data; 1147 *part &= (1 << PARTN_BITS) - 1; 1148 return &p->dev.kobj; 1149} 1150 1151static int exact_lock(dev_t dev, void *data) 1152{ 1153 struct gendisk *p = data; 1154 1155 if (!get_disk(p)) 1156 return -1; 1157 return 0; 1158} 1159 1160void ide_register_region(struct gendisk *disk) 1161{ 1162 blk_register_region(MKDEV(disk->major, disk->first_minor), 1163 disk->minors, NULL, exact_match, exact_lock, disk); 1164} 1165 1166EXPORT_SYMBOL_GPL(ide_register_region); 1167 1168void ide_unregister_region(struct gendisk *disk) 1169{ 1170 blk_unregister_region(MKDEV(disk->major, disk->first_minor), 1171 disk->minors); 1172} 1173 1174EXPORT_SYMBOL_GPL(ide_unregister_region); 1175 1176void ide_init_disk(struct gendisk *disk, ide_drive_t *drive) 1177{ 1178 ide_hwif_t *hwif = drive->hwif; 1179 unsigned int unit = (drive->select.all >> 4) & 1; 1180 1181 disk->major = hwif->major; 1182 disk->first_minor = unit << PARTN_BITS; 1183 sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit); 1184 disk->queue = drive->queue; 1185} 1186 1187EXPORT_SYMBOL_GPL(ide_init_disk); 1188 1189static void ide_remove_drive_from_hwgroup(ide_drive_t *drive) 1190{ 1191 ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; 1192 1193 if (drive == drive->next) { 1194 /* special case: last drive from hwgroup. */ 1195 BUG_ON(hwgroup->drive != drive); 1196 hwgroup->drive = NULL; 1197 } else { 1198 ide_drive_t *walk; 1199 1200 walk = hwgroup->drive; 1201 while (walk->next != drive) 1202 walk = walk->next; 1203 walk->next = drive->next; 1204 if (hwgroup->drive == drive) { 1205 hwgroup->drive = drive->next; 1206 hwgroup->hwif = hwgroup->drive->hwif; 1207 } 1208 } 1209 BUG_ON(hwgroup->drive == drive); 1210} 1211 1212static void drive_release_dev (struct device *dev) 1213{ 1214 ide_drive_t *drive = container_of(dev, ide_drive_t, gendev); 1215 1216 ide_proc_unregister_device(drive); 1217 1218 spin_lock_irq(&ide_lock); 1219 ide_remove_drive_from_hwgroup(drive); 1220 kfree(drive->id); 1221 drive->id = NULL; 1222 drive->present = 0; 1223 /* Messed up locking ... */ 1224 spin_unlock_irq(&ide_lock); 1225 blk_cleanup_queue(drive->queue); 1226 spin_lock_irq(&ide_lock); 1227 drive->queue = NULL; 1228 spin_unlock_irq(&ide_lock); 1229 1230 complete(&drive->gendev_rel_comp); 1231} 1232 1233static int hwif_init(ide_hwif_t *hwif) 1234{ 1235 int old_irq; 1236 1237 if (!hwif->irq) { 1238 if (!(hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET]))) 1239 { 1240 printk("%s: DISABLED, NO IRQ\n", hwif->name); 1241 return 0; 1242 } 1243 } 1244 1245 if (register_blkdev(hwif->major, hwif->name)) 1246 return 0; 1247 1248 if (!hwif->sg_max_nents) 1249 hwif->sg_max_nents = PRD_ENTRIES; 1250 1251 hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents, 1252 GFP_KERNEL); 1253 if (!hwif->sg_table) { 1254 printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name); 1255 goto out; 1256 } 1257 1258 sg_init_table(hwif->sg_table, hwif->sg_max_nents); 1259 1260 if (init_irq(hwif) == 0) 1261 goto done; 1262 1263 old_irq = hwif->irq; 1264 /* 1265 * It failed to initialise. Find the default IRQ for 1266 * this port and try that. 1267 */ 1268 if (!(hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET]))) { 1269 printk("%s: Disabled unable to get IRQ %d.\n", 1270 hwif->name, old_irq); 1271 goto out; 1272 } 1273 if (init_irq(hwif)) { 1274 printk("%s: probed IRQ %d and default IRQ %d failed.\n", 1275 hwif->name, old_irq, hwif->irq); 1276 goto out; 1277 } 1278 printk("%s: probed IRQ %d failed, using default.\n", 1279 hwif->name, hwif->irq); 1280 1281done: 1282 blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS, 1283 THIS_MODULE, ata_probe, ata_lock, hwif); 1284 return 1; 1285 1286out: 1287 unregister_blkdev(hwif->major, hwif->name); 1288 return 0; 1289} 1290 1291static void hwif_register_devices(ide_hwif_t *hwif) 1292{ 1293 unsigned int i; 1294 1295 for (i = 0; i < MAX_DRIVES; i++) { 1296 ide_drive_t *drive = &hwif->drives[i]; 1297 struct device *dev = &drive->gendev; 1298 int ret; 1299 1300 if (!drive->present) 1301 continue; 1302 1303 ide_add_generic_settings(drive); 1304 1305 snprintf(dev->bus_id, BUS_ID_SIZE, "%u.%u", hwif->index, i); 1306 dev->parent = &hwif->gendev; 1307 dev->bus = &ide_bus_type; 1308 dev->driver_data = drive; 1309 dev->release = drive_release_dev; 1310 1311 ret = device_register(dev); 1312 if (ret < 0) 1313 printk(KERN_WARNING "IDE: %s: device_register error: " 1314 "%d\n", __func__, ret); 1315 } 1316} 1317 1318static void ide_port_init_devices(ide_hwif_t *hwif) 1319{ 1320 int i; 1321 1322 for (i = 0; i < MAX_DRIVES; i++) { 1323 ide_drive_t *drive = &hwif->drives[i]; 1324 1325 if (hwif->host_flags & IDE_HFLAG_IO_32BIT) 1326 drive->io_32bit = 1; 1327 if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS) 1328 drive->unmask = 1; 1329 if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS) 1330 drive->no_unmask = 1; 1331 if ((hwif->host_flags & IDE_HFLAG_NO_AUTOTUNE) == 0) 1332 drive->autotune = 1; 1333 } 1334 1335 if (hwif->port_init_devs) 1336 hwif->port_init_devs(hwif); 1337} 1338 1339static void ide_init_port(ide_hwif_t *hwif, unsigned int port, 1340 const struct ide_port_info *d) 1341{ 1342 if (d->chipset != ide_etrax100) 1343 hwif->channel = port; 1344 1345 if (d->chipset) 1346 hwif->chipset = d->chipset; 1347 1348 if (d->init_iops) 1349 d->init_iops(hwif); 1350 1351 if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) 1352 ide_hwif_setup_dma(hwif, d); 1353 1354 if ((!hwif->irq && (d->host_flags & IDE_HFLAG_LEGACY_IRQS)) || 1355 (d->host_flags & IDE_HFLAG_FORCE_LEGACY_IRQS)) 1356 hwif->irq = port ? 15 : 14; 1357 1358 hwif->host_flags = d->host_flags; 1359 hwif->pio_mask = d->pio_mask; 1360 1361 if ((d->host_flags & IDE_HFLAG_SERIALIZE) && hwif->mate) 1362 hwif->mate->serialized = hwif->serialized = 1; 1363 1364 hwif->swdma_mask = d->swdma_mask; 1365 hwif->mwdma_mask = d->mwdma_mask; 1366 hwif->ultra_mask = d->udma_mask; 1367 1368 /* reset DMA masks only for SFF-style DMA controllers */ 1369 if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0 && hwif->dma_base == 0) 1370 hwif->swdma_mask = hwif->mwdma_mask = hwif->ultra_mask = 0; 1371 1372 if (d->host_flags & IDE_HFLAG_RQSIZE_256) 1373 hwif->rqsize = 256; 1374 1375 /* call chipset specific routine for each enabled port */ 1376 if (d->init_hwif) 1377 d->init_hwif(hwif); 1378} 1379 1380static void ide_port_cable_detect(ide_hwif_t *hwif) 1381{ 1382 if (hwif->cable_detect && (hwif->ultra_mask & 0x78)) { 1383 if (hwif->cbl != ATA_CBL_PATA40_SHORT) 1384 hwif->cbl = hwif->cable_detect(hwif); 1385 } 1386} 1387 1388static ssize_t store_delete_devices(struct device *portdev, 1389 struct device_attribute *attr, 1390 const char *buf, size_t n) 1391{ 1392 ide_hwif_t *hwif = dev_get_drvdata(portdev); 1393 1394 if (strncmp(buf, "1", n)) 1395 return -EINVAL; 1396 1397 ide_port_unregister_devices(hwif); 1398 1399 return n; 1400}; 1401 1402static DEVICE_ATTR(delete_devices, S_IWUSR, NULL, store_delete_devices); 1403 1404static ssize_t store_scan(struct device *portdev, 1405 struct device_attribute *attr, 1406 const char *buf, size_t n) 1407{ 1408 ide_hwif_t *hwif = dev_get_drvdata(portdev); 1409 1410 if (strncmp(buf, "1", n)) 1411 return -EINVAL; 1412 1413 ide_port_unregister_devices(hwif); 1414 ide_port_scan(hwif); 1415 1416 return n; 1417}; 1418 1419static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan); 1420 1421static struct device_attribute *ide_port_attrs[] = { 1422 &dev_attr_delete_devices, 1423 &dev_attr_scan, 1424 NULL 1425}; 1426 1427static int ide_sysfs_register_port(ide_hwif_t *hwif) 1428{ 1429 int i, rc; 1430 1431 for (i = 0; ide_port_attrs[i]; i++) { 1432 rc = device_create_file(hwif->portdev, ide_port_attrs[i]); 1433 if (rc) 1434 break; 1435 } 1436 1437 return rc; 1438} 1439 1440int ide_device_add_all(u8 *idx, const struct ide_port_info *d) 1441{ 1442 ide_hwif_t *hwif, *mate = NULL; 1443 int i, rc = 0; 1444 1445 for (i = 0; i < MAX_HWIFS; i++) { 1446 if (d == NULL || idx[i] == 0xff) { 1447 mate = NULL; 1448 continue; 1449 } 1450 1451 hwif = &ide_hwifs[idx[i]]; 1452 1453 if (d->chipset != ide_etrax100 && (i & 1) && mate) { 1454 hwif->mate = mate; 1455 mate->mate = hwif; 1456 } 1457 1458 mate = (i & 1) ? NULL : hwif; 1459 1460 ide_init_port(hwif, i & 1, d); 1461 ide_port_cable_detect(hwif); 1462 ide_port_init_devices(hwif); 1463 } 1464 1465 for (i = 0; i < MAX_HWIFS; i++) { 1466 if (idx[i] == 0xff) 1467 continue; 1468 1469 hwif = &ide_hwifs[idx[i]]; 1470 1471 if ((hwif->chipset != ide_4drives || !hwif->mate || 1472 !hwif->mate->present) && ide_hwif_request_regions(hwif)) { 1473 printk(KERN_ERR "%s: ports already in use, " 1474 "skipping probe\n", hwif->name); 1475 continue; 1476 } 1477 1478 if (ide_probe_port(hwif) < 0) { 1479 ide_hwif_release_regions(hwif); 1480 continue; 1481 } 1482 1483 hwif->present = 1; 1484 1485 if (hwif->chipset != ide_4drives || !hwif->mate || 1486 !hwif->mate->present) 1487 ide_register_port(hwif); 1488 1489 ide_port_tune_devices(hwif); 1490 } 1491 1492 for (i = 0; i < MAX_HWIFS; i++) { 1493 if (idx[i] == 0xff) 1494 continue; 1495 1496 hwif = &ide_hwifs[idx[i]]; 1497 1498 if (!hwif->present) 1499 continue; 1500 1501 if (hwif_init(hwif) == 0) { 1502 printk(KERN_INFO "%s: failed to initialize IDE " 1503 "interface\n", hwif->name); 1504 hwif->present = 0; 1505 rc = -1; 1506 continue; 1507 } 1508 1509 ide_port_setup_devices(hwif); 1510 1511 ide_acpi_init(hwif); 1512 ide_acpi_port_init_devices(hwif); 1513 } 1514 1515 for (i = 0; i < MAX_HWIFS; i++) { 1516 if (idx[i] == 0xff) 1517 continue; 1518 1519 hwif = &ide_hwifs[idx[i]]; 1520 1521 if (hwif->present) { 1522 if (hwif->chipset == ide_unknown) 1523 hwif->chipset = ide_generic; 1524 hwif_register_devices(hwif); 1525 } 1526 } 1527 1528 for (i = 0; i < MAX_HWIFS; i++) { 1529 if (idx[i] == 0xff) 1530 continue; 1531 1532 hwif = &ide_hwifs[idx[i]]; 1533 1534 if (hwif->present) { 1535 ide_sysfs_register_port(hwif); 1536 ide_proc_register_port(hwif); 1537 ide_proc_port_register_devices(hwif); 1538 } 1539 } 1540 1541 return rc; 1542} 1543EXPORT_SYMBOL_GPL(ide_device_add_all); 1544 1545int ide_device_add(u8 idx[4], const struct ide_port_info *d) 1546{ 1547 u8 idx_all[MAX_HWIFS]; 1548 int i; 1549 1550 for (i = 0; i < MAX_HWIFS; i++) 1551 idx_all[i] = (i < 4) ? idx[i] : 0xff; 1552 1553 return ide_device_add_all(idx_all, d); 1554} 1555EXPORT_SYMBOL_GPL(ide_device_add); 1556 1557void ide_port_scan(ide_hwif_t *hwif) 1558{ 1559 ide_port_cable_detect(hwif); 1560 ide_port_init_devices(hwif); 1561 1562 if (ide_probe_port(hwif) < 0) 1563 return; 1564 1565 hwif->present = 1; 1566 1567 ide_port_tune_devices(hwif); 1568 ide_acpi_port_init_devices(hwif); 1569 ide_port_setup_devices(hwif); 1570 hwif_register_devices(hwif); 1571 ide_proc_port_register_devices(hwif); 1572} 1573EXPORT_SYMBOL_GPL(ide_port_scan); 1574