ide-probe.c revision 4a546e046d562bcd389149591fa5a534c8f832ca
1/* 2 * linux/drivers/ide/ide-probe.c Version 1.11 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 IDE probe module, as evolved from hd.c and ide.c. 15 * 16 * -- increase WAIT_PIDENTIFY to avoid CD-ROM locking at boot 17 * by Andrea Arcangeli 18 */ 19 20#include <linux/module.h> 21#include <linux/types.h> 22#include <linux/string.h> 23#include <linux/kernel.h> 24#include <linux/timer.h> 25#include <linux/mm.h> 26#include <linux/interrupt.h> 27#include <linux/major.h> 28#include <linux/errno.h> 29#include <linux/genhd.h> 30#include <linux/slab.h> 31#include <linux/delay.h> 32#include <linux/ide.h> 33#include <linux/spinlock.h> 34#include <linux/kmod.h> 35#include <linux/pci.h> 36#include <linux/scatterlist.h> 37 38#include <asm/byteorder.h> 39#include <asm/irq.h> 40#include <asm/uaccess.h> 41#include <asm/io.h> 42 43/** 44 * generic_id - add a generic drive id 45 * @drive: drive to make an ID block for 46 * 47 * Add a fake id field to the drive we are passed. This allows 48 * use to skip a ton of NULL checks (which people always miss) 49 * and make drive properties unconditional outside of this file 50 */ 51 52static void generic_id(ide_drive_t *drive) 53{ 54 drive->id->cyls = drive->cyl; 55 drive->id->heads = drive->head; 56 drive->id->sectors = drive->sect; 57 drive->id->cur_cyls = drive->cyl; 58 drive->id->cur_heads = drive->head; 59 drive->id->cur_sectors = drive->sect; 60} 61 62static void ide_disk_init_chs(ide_drive_t *drive) 63{ 64 struct hd_driveid *id = drive->id; 65 66 /* Extract geometry if we did not already have one for the drive */ 67 if (!drive->cyl || !drive->head || !drive->sect) { 68 drive->cyl = drive->bios_cyl = id->cyls; 69 drive->head = drive->bios_head = id->heads; 70 drive->sect = drive->bios_sect = id->sectors; 71 } 72 73 /* Handle logical geometry translation by the drive */ 74 if ((id->field_valid & 1) && id->cur_cyls && 75 id->cur_heads && (id->cur_heads <= 16) && id->cur_sectors) { 76 drive->cyl = id->cur_cyls; 77 drive->head = id->cur_heads; 78 drive->sect = id->cur_sectors; 79 } 80 81 /* Use physical geometry if what we have still makes no sense */ 82 if (drive->head > 16 && id->heads && id->heads <= 16) { 83 drive->cyl = id->cyls; 84 drive->head = id->heads; 85 drive->sect = id->sectors; 86 } 87} 88 89static void ide_disk_init_mult_count(ide_drive_t *drive) 90{ 91 struct hd_driveid *id = drive->id; 92 93 drive->mult_count = 0; 94 if (id->max_multsect) { 95#ifdef CONFIG_IDEDISK_MULTI_MODE 96 id->multsect = ((id->max_multsect/2) > 1) ? id->max_multsect : 0; 97 id->multsect_valid = id->multsect ? 1 : 0; 98 drive->mult_req = id->multsect_valid ? id->max_multsect : 0; 99 drive->special.b.set_multmode = drive->mult_req ? 1 : 0; 100#else /* original, pre IDE-NFG, per request of AC */ 101 drive->mult_req = 0; 102 if (drive->mult_req > id->max_multsect) 103 drive->mult_req = id->max_multsect; 104 if (drive->mult_req || ((id->multsect_valid & 1) && id->multsect)) 105 drive->special.b.set_multmode = 1; 106#endif 107 } 108} 109 110/** 111 * do_identify - identify a drive 112 * @drive: drive to identify 113 * @cmd: command used 114 * 115 * Called when we have issued a drive identify command to 116 * read and parse the results. This function is run with 117 * interrupts disabled. 118 */ 119 120static inline void do_identify (ide_drive_t *drive, u8 cmd) 121{ 122 ide_hwif_t *hwif = HWIF(drive); 123 int bswap = 1; 124 struct hd_driveid *id; 125 126 id = drive->id; 127 /* read 512 bytes of id info */ 128 hwif->ata_input_data(drive, id, SECTOR_WORDS); 129 130 drive->id_read = 1; 131 local_irq_enable(); 132 ide_fix_driveid(id); 133 134#if defined (CONFIG_SCSI_EATA_PIO) || defined (CONFIG_SCSI_EATA) 135 /* 136 * EATA SCSI controllers do a hardware ATA emulation: 137 * Ignore them if there is a driver for them available. 138 */ 139 if ((id->model[0] == 'P' && id->model[1] == 'M') || 140 (id->model[0] == 'S' && id->model[1] == 'K')) { 141 printk("%s: EATA SCSI HBA %.10s\n", drive->name, id->model); 142 goto err_misc; 143 } 144#endif /* CONFIG_SCSI_EATA || CONFIG_SCSI_EATA_PIO */ 145 146 /* 147 * WIN_IDENTIFY returns little-endian info, 148 * WIN_PIDENTIFY *usually* returns little-endian info. 149 */ 150 if (cmd == WIN_PIDENTIFY) { 151 if ((id->model[0] == 'N' && id->model[1] == 'E') /* NEC */ 152 || (id->model[0] == 'F' && id->model[1] == 'X') /* Mitsumi */ 153 || (id->model[0] == 'P' && id->model[1] == 'i'))/* Pioneer */ 154 /* Vertos drives may still be weird */ 155 bswap ^= 1; 156 } 157 ide_fixstring(id->model, sizeof(id->model), bswap); 158 ide_fixstring(id->fw_rev, sizeof(id->fw_rev), bswap); 159 ide_fixstring(id->serial_no, sizeof(id->serial_no), bswap); 160 161 /* we depend on this a lot! */ 162 id->model[sizeof(id->model)-1] = '\0'; 163 164 if (strstr(id->model, "E X A B Y T E N E S T")) 165 goto err_misc; 166 167 printk("%s: %s, ", drive->name, id->model); 168 drive->present = 1; 169 drive->dead = 0; 170 171 /* 172 * Check for an ATAPI device 173 */ 174 if (cmd == WIN_PIDENTIFY) { 175 u8 type = (id->config >> 8) & 0x1f; 176 printk("ATAPI "); 177 switch (type) { 178 case ide_floppy: 179 if (!strstr(id->model, "CD-ROM")) { 180 if (!strstr(id->model, "oppy") && 181 !strstr(id->model, "poyp") && 182 !strstr(id->model, "ZIP")) 183 printk("cdrom or floppy?, assuming "); 184 if (drive->media != ide_cdrom) { 185 printk ("FLOPPY"); 186 drive->removable = 1; 187 break; 188 } 189 } 190 /* Early cdrom models used zero */ 191 type = ide_cdrom; 192 case ide_cdrom: 193 drive->removable = 1; 194#ifdef CONFIG_PPC 195 /* kludge for Apple PowerBook internal zip */ 196 if (!strstr(id->model, "CD-ROM") && 197 strstr(id->model, "ZIP")) { 198 printk ("FLOPPY"); 199 type = ide_floppy; 200 break; 201 } 202#endif 203 printk ("CD/DVD-ROM"); 204 break; 205 case ide_tape: 206 printk ("TAPE"); 207 break; 208 case ide_optical: 209 printk ("OPTICAL"); 210 drive->removable = 1; 211 break; 212 default: 213 printk("UNKNOWN (type %d)", type); 214 break; 215 } 216 printk (" drive\n"); 217 drive->media = type; 218 /* an ATAPI device ignores DRDY */ 219 drive->ready_stat = 0; 220 return; 221 } 222 223 /* 224 * Not an ATAPI device: looks like a "regular" hard disk 225 */ 226 227 /* 228 * 0x848a = CompactFlash device 229 * These are *not* removable in Linux definition of the term 230 */ 231 232 if ((id->config != 0x848a) && (id->config & (1<<7))) 233 drive->removable = 1; 234 235 drive->media = ide_disk; 236 printk("%s DISK drive\n", (id->config == 0x848a) ? "CFA" : "ATA" ); 237 238 if (hwif->quirkproc) 239 drive->quirk_list = hwif->quirkproc(drive); 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 rc; 268 unsigned long hd_status; 269 unsigned long timeout; 270 u8 s = 0, a = 0; 271 272 /* take a deep breath */ 273 msleep(50); 274 275 if (IDE_CONTROL_REG) { 276 a = hwif->INB(IDE_ALTSTATUS_REG); 277 s = hwif->INB(IDE_STATUS_REG); 278 if ((a ^ s) & ~INDEX_STAT) { 279 printk(KERN_INFO "%s: probing with STATUS(0x%02x) instead of " 280 "ALTSTATUS(0x%02x)\n", drive->name, s, a); 281 /* ancient Seagate drives, broken interfaces */ 282 hd_status = IDE_STATUS_REG; 283 } else { 284 /* use non-intrusive polling */ 285 hd_status = IDE_ALTSTATUS_REG; 286 } 287 } else 288 hd_status = IDE_STATUS_REG; 289 290 /* set features register for atapi 291 * identify command to be sure of reply 292 */ 293 if ((cmd == WIN_PIDENTIFY)) 294 /* disable dma & overlap */ 295 hwif->OUTB(0, IDE_FEATURE_REG); 296 297 /* ask drive for ID */ 298 hwif->OUTB(cmd, IDE_COMMAND_REG); 299 300 timeout = ((cmd == WIN_IDENTIFY) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2; 301 timeout += jiffies; 302 do { 303 if (time_after(jiffies, timeout)) { 304 /* drive timed-out */ 305 return 1; 306 } 307 /* give drive a breather */ 308 msleep(50); 309 } while ((hwif->INB(hd_status)) & BUSY_STAT); 310 311 /* wait for IRQ and DRQ_STAT */ 312 msleep(50); 313 if (OK_STAT((hwif->INB(IDE_STATUS_REG)), DRQ_STAT, BAD_R_STAT)) { 314 unsigned long flags; 315 316 /* local CPU only; some systems need this */ 317 local_irq_save(flags); 318 /* drive returned ID */ 319 do_identify(drive, cmd); 320 /* drive responded with ID */ 321 rc = 0; 322 /* clear drive IRQ */ 323 (void) hwif->INB(IDE_STATUS_REG); 324 local_irq_restore(flags); 325 } else { 326 /* drive refused ID */ 327 rc = 2; 328 } 329 return rc; 330} 331 332/** 333 * try_to_identify - try to identify a drive 334 * @drive: drive to probe 335 * @cmd: command to use 336 * 337 * Issue the identify command and then do IRQ probing to 338 * complete the identification when needed by finding the 339 * IRQ the drive is attached to 340 */ 341 342static int try_to_identify (ide_drive_t *drive, u8 cmd) 343{ 344 ide_hwif_t *hwif = HWIF(drive); 345 int retval; 346 int autoprobe = 0; 347 unsigned long cookie = 0; 348 349 /* 350 * Disable device irq unless we need to 351 * probe for it. Otherwise we'll get spurious 352 * interrupts during the identify-phase that 353 * the irq handler isn't expecting. 354 */ 355 if (IDE_CONTROL_REG) { 356 u8 ctl = drive->ctl | 2; 357 if (!hwif->irq) { 358 autoprobe = 1; 359 cookie = probe_irq_on(); 360 /* enable device irq */ 361 ctl &= ~2; 362 } 363 hwif->OUTB(ctl, IDE_CONTROL_REG); 364 } 365 366 retval = actual_try_to_identify(drive, cmd); 367 368 if (autoprobe) { 369 int irq; 370 /* mask device irq */ 371 hwif->OUTB(drive->ctl|2, IDE_CONTROL_REG); 372 /* clear drive IRQ */ 373 (void) hwif->INB(IDE_STATUS_REG); 374 udelay(5); 375 irq = probe_irq_off(cookie); 376 if (!hwif->irq) { 377 if (irq > 0) { 378 hwif->irq = irq; 379 } else { 380 /* Mmmm.. multiple IRQs.. 381 * don't know which was ours 382 */ 383 printk("%s: IRQ probe failed (0x%lx)\n", 384 drive->name, cookie); 385 } 386 } 387 } 388 return retval; 389} 390 391 392/** 393 * do_probe - probe an IDE device 394 * @drive: drive to probe 395 * @cmd: command to use 396 * 397 * do_probe() has the difficult job of finding a drive if it exists, 398 * without getting hung up if it doesn't exist, without trampling on 399 * ethernet cards, and without leaving any IRQs dangling to haunt us later. 400 * 401 * If a drive is "known" to exist (from CMOS or kernel parameters), 402 * but does not respond right away, the probe will "hang in there" 403 * for the maximum wait time (about 30 seconds), otherwise it will 404 * exit much more quickly. 405 * 406 * Returns: 0 device was identified 407 * 1 device timed-out (no response to identify request) 408 * 2 device aborted the command (refused to identify itself) 409 * 3 bad status from device (possible for ATAPI drives) 410 * 4 probe was not attempted because failure was obvious 411 */ 412 413static int do_probe (ide_drive_t *drive, u8 cmd) 414{ 415 int rc; 416 ide_hwif_t *hwif = HWIF(drive); 417 418 if (drive->present) { 419 /* avoid waiting for inappropriate probes */ 420 if ((drive->media != ide_disk) && (cmd == WIN_IDENTIFY)) 421 return 4; 422 } 423#ifdef DEBUG 424 printk("probing for %s: present=%d, media=%d, probetype=%s\n", 425 drive->name, drive->present, drive->media, 426 (cmd == WIN_IDENTIFY) ? "ATA" : "ATAPI"); 427#endif 428 429 /* needed for some systems 430 * (e.g. crw9624 as drive0 with disk as slave) 431 */ 432 msleep(50); 433 SELECT_DRIVE(drive); 434 msleep(50); 435 if (hwif->INB(IDE_SELECT_REG) != drive->select.all && !drive->present) { 436 if (drive->select.b.unit != 0) { 437 /* exit with drive0 selected */ 438 SELECT_DRIVE(&hwif->drives[0]); 439 /* allow BUSY_STAT to assert & clear */ 440 msleep(50); 441 } 442 /* no i/f present: mmm.. this should be a 4 -ml */ 443 return 3; 444 } 445 446 if (OK_STAT((hwif->INB(IDE_STATUS_REG)), READY_STAT, BUSY_STAT) || 447 drive->present || cmd == WIN_PIDENTIFY) { 448 /* send cmd and wait */ 449 if ((rc = try_to_identify(drive, cmd))) { 450 /* failed: try again */ 451 rc = try_to_identify(drive,cmd); 452 } 453 if (hwif->INB(IDE_STATUS_REG) == (BUSY_STAT|READY_STAT)) 454 return 4; 455 456 if ((rc == 1 && cmd == WIN_PIDENTIFY) && 457 ((drive->autotune == IDE_TUNE_DEFAULT) || 458 (drive->autotune == IDE_TUNE_AUTO))) { 459 unsigned long timeout; 460 printk("%s: no response (status = 0x%02x), " 461 "resetting drive\n", drive->name, 462 hwif->INB(IDE_STATUS_REG)); 463 msleep(50); 464 hwif->OUTB(drive->select.all, IDE_SELECT_REG); 465 msleep(50); 466 hwif->OUTB(WIN_SRST, IDE_COMMAND_REG); 467 timeout = jiffies; 468 while (((hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && 469 time_before(jiffies, timeout + WAIT_WORSTCASE)) 470 msleep(50); 471 rc = try_to_identify(drive, cmd); 472 } 473 if (rc == 1) 474 printk("%s: no response (status = 0x%02x)\n", 475 drive->name, hwif->INB(IDE_STATUS_REG)); 476 /* ensure drive irq is clear */ 477 (void) hwif->INB(IDE_STATUS_REG); 478 } else { 479 /* not present or maybe ATAPI */ 480 rc = 3; 481 } 482 if (drive->select.b.unit != 0) { 483 /* exit with drive0 selected */ 484 SELECT_DRIVE(&hwif->drives[0]); 485 msleep(50); 486 /* ensure drive irq is clear */ 487 (void) hwif->INB(IDE_STATUS_REG); 488 } 489 return rc; 490} 491 492/* 493 * 494 */ 495static void enable_nest (ide_drive_t *drive) 496{ 497 ide_hwif_t *hwif = HWIF(drive); 498 unsigned long timeout; 499 500 printk("%s: enabling %s -- ", hwif->name, drive->id->model); 501 SELECT_DRIVE(drive); 502 msleep(50); 503 hwif->OUTB(EXABYTE_ENABLE_NEST, IDE_COMMAND_REG); 504 timeout = jiffies + WAIT_WORSTCASE; 505 do { 506 if (time_after(jiffies, timeout)) { 507 printk("failed (timeout)\n"); 508 return; 509 } 510 msleep(50); 511 } while ((hwif->INB(IDE_STATUS_REG)) & BUSY_STAT); 512 513 msleep(50); 514 515 if (!OK_STAT((hwif->INB(IDE_STATUS_REG)), 0, BAD_STAT)) { 516 printk("failed (status = 0x%02x)\n", hwif->INB(IDE_STATUS_REG)); 517 } else { 518 printk("success\n"); 519 } 520 521 /* if !(success||timed-out) */ 522 if (do_probe(drive, WIN_IDENTIFY) >= 2) { 523 /* look for ATAPI device */ 524 (void) do_probe(drive, WIN_PIDENTIFY); 525 } 526} 527 528/** 529 * probe_for_drives - upper level drive probe 530 * @drive: drive to probe for 531 * 532 * probe_for_drive() tests for existence of a given drive using do_probe() 533 * and presents things to the user as needed. 534 * 535 * Returns: 0 no device was found 536 * 1 device was found (note: drive->present might 537 * still be 0) 538 */ 539 540static inline u8 probe_for_drive (ide_drive_t *drive) 541{ 542 /* 543 * In order to keep things simple we have an id 544 * block for all drives at all times. If the device 545 * is pre ATA or refuses ATA/ATAPI identify we 546 * will add faked data to this. 547 * 548 * Also note that 0 everywhere means "can't do X" 549 */ 550 551 drive->id = kzalloc(SECTOR_WORDS *4, GFP_KERNEL); 552 drive->id_read = 0; 553 if(drive->id == NULL) 554 { 555 printk(KERN_ERR "ide: out of memory for id data.\n"); 556 return 0; 557 } 558 strcpy(drive->id->model, "UNKNOWN"); 559 560 /* skip probing? */ 561 if (!drive->noprobe) 562 { 563 /* if !(success||timed-out) */ 564 if (do_probe(drive, WIN_IDENTIFY) >= 2) { 565 /* look for ATAPI device */ 566 (void) do_probe(drive, WIN_PIDENTIFY); 567 } 568 if (!drive->present) 569 /* drive not found */ 570 return 0; 571 if (strstr(drive->id->model, "E X A B Y T E N E S T")) 572 enable_nest(drive); 573 574 /* identification failed? */ 575 if (!drive->id_read) { 576 if (drive->media == ide_disk) { 577 printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n", 578 drive->name, drive->cyl, 579 drive->head, drive->sect); 580 } else if (drive->media == ide_cdrom) { 581 printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name); 582 } else { 583 /* nuke it */ 584 printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name); 585 drive->present = 0; 586 } 587 } 588 /* drive was found */ 589 } 590 if(!drive->present) 591 return 0; 592 /* The drive wasn't being helpful. Add generic info only */ 593 if (drive->id_read == 0) { 594 generic_id(drive); 595 return 1; 596 } 597 598 if (drive->media == ide_disk) { 599 ide_disk_init_chs(drive); 600 ide_disk_init_mult_count(drive); 601 } 602 603 return drive->present; 604} 605 606static void hwif_release_dev (struct device *dev) 607{ 608 ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev); 609 610 complete(&hwif->gendev_rel_comp); 611} 612 613static void hwif_register (ide_hwif_t *hwif) 614{ 615 int ret; 616 617 /* register with global device tree */ 618 strlcpy(hwif->gendev.bus_id,hwif->name,BUS_ID_SIZE); 619 hwif->gendev.driver_data = hwif; 620 if (hwif->gendev.parent == NULL) { 621 if (hwif->pci_dev) 622 hwif->gendev.parent = &hwif->pci_dev->dev; 623 else 624 /* Would like to do = &device_legacy */ 625 hwif->gendev.parent = NULL; 626 } 627 hwif->gendev.release = hwif_release_dev; 628 ret = device_register(&hwif->gendev); 629 if (ret < 0) 630 printk(KERN_WARNING "IDE: %s: device_register error: %d\n", 631 __FUNCTION__, ret); 632} 633 634static int wait_hwif_ready(ide_hwif_t *hwif) 635{ 636 int unit, rc; 637 638 printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name); 639 640 /* Let HW settle down a bit from whatever init state we 641 * come from */ 642 mdelay(2); 643 644 /* Wait for BSY bit to go away, spec timeout is 30 seconds, 645 * I know of at least one disk who takes 31 seconds, I use 35 646 * here to be safe 647 */ 648 rc = ide_wait_not_busy(hwif, 35000); 649 if (rc) 650 return rc; 651 652 /* Now make sure both master & slave are ready */ 653 for (unit = 0; unit < MAX_DRIVES; unit++) { 654 ide_drive_t *drive = &hwif->drives[unit]; 655 656 /* Ignore disks that we will not probe for later. */ 657 if (!drive->noprobe || drive->present) { 658 SELECT_DRIVE(drive); 659 if (IDE_CONTROL_REG) 660 hwif->OUTB(drive->ctl, IDE_CONTROL_REG); 661 mdelay(2); 662 rc = ide_wait_not_busy(hwif, 35000); 663 if (rc) 664 goto out; 665 } else 666 printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n", 667 drive->name); 668 } 669out: 670 /* Exit function with master reselected (let's be sane) */ 671 if (unit) 672 SELECT_DRIVE(&hwif->drives[0]); 673 674 return rc; 675} 676 677/** 678 * ide_undecoded_slave - look for bad CF adapters 679 * @hwif: interface 680 * 681 * Analyse the drives on the interface and attempt to decide if we 682 * have the same drive viewed twice. This occurs with crap CF adapters 683 * and PCMCIA sometimes. 684 */ 685 686void ide_undecoded_slave(ide_hwif_t *hwif) 687{ 688 ide_drive_t *drive0 = &hwif->drives[0]; 689 ide_drive_t *drive1 = &hwif->drives[1]; 690 691 if (drive0->present == 0 || drive1->present == 0) 692 return; 693 694 /* If the models don't match they are not the same product */ 695 if (strcmp(drive0->id->model, drive1->id->model)) 696 return; 697 698 /* Serial numbers do not match */ 699 if (strncmp(drive0->id->serial_no, drive1->id->serial_no, 20)) 700 return; 701 702 /* No serial number, thankfully very rare for CF */ 703 if (drive0->id->serial_no[0] == 0) 704 return; 705 706 /* Appears to be an IDE flash adapter with decode bugs */ 707 printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n"); 708 709 drive1->present = 0; 710} 711 712EXPORT_SYMBOL_GPL(ide_undecoded_slave); 713 714/* 715 * This routine only knows how to look for drive units 0 and 1 716 * on an interface, so any setting of MAX_DRIVES > 2 won't work here. 717 */ 718static void probe_hwif(ide_hwif_t *hwif) 719{ 720 unsigned long flags; 721 unsigned int irqd; 722 int unit; 723 724 if (hwif->noprobe) 725 return; 726 727 if ((hwif->chipset != ide_4drives || !hwif->mate || !hwif->mate->present) && 728 (ide_hwif_request_regions(hwif))) { 729 u16 msgout = 0; 730 for (unit = 0; unit < MAX_DRIVES; ++unit) { 731 ide_drive_t *drive = &hwif->drives[unit]; 732 if (drive->present) { 733 drive->present = 0; 734 printk(KERN_ERR "%s: ERROR, PORTS ALREADY IN USE\n", 735 drive->name); 736 msgout = 1; 737 } 738 } 739 if (!msgout) 740 printk(KERN_ERR "%s: ports already in use, skipping probe\n", 741 hwif->name); 742 return; 743 } 744 745 /* 746 * We must always disable IRQ, as probe_for_drive will assert IRQ, but 747 * we'll install our IRQ driver much later... 748 */ 749 irqd = hwif->irq; 750 if (irqd) 751 disable_irq(hwif->irq); 752 753 local_irq_set(flags); 754 755 /* This is needed on some PPCs and a bunch of BIOS-less embedded 756 * platforms. Typical cases are: 757 * 758 * - The firmware hard reset the disk before booting the kernel, 759 * the drive is still doing it's poweron-reset sequence, that 760 * can take up to 30 seconds 761 * - The firmware does nothing (or no firmware), the device is 762 * still in POST state (same as above actually). 763 * - Some CD/DVD/Writer combo drives tend to drive the bus during 764 * their reset sequence even when they are non-selected slave 765 * devices, thus preventing discovery of the main HD 766 * 767 * Doing this wait-for-busy should not harm any existing configuration 768 * (at least things won't be worse than what current code does, that 769 * is blindly go & talk to the drive) and fix some issues like the 770 * above. 771 * 772 * BenH. 773 */ 774 if (wait_hwif_ready(hwif) == -EBUSY) 775 printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name); 776 777 /* 778 * Need to probe slave device first to make it release PDIAG-. 779 */ 780 for (unit = MAX_DRIVES - 1; unit >= 0; unit--) { 781 ide_drive_t *drive = &hwif->drives[unit]; 782 drive->dn = (hwif->channel ? 2 : 0) + unit; 783 (void) probe_for_drive(drive); 784 if (drive->present && !hwif->present) { 785 hwif->present = 1; 786 if (hwif->chipset != ide_4drives || 787 !hwif->mate || 788 !hwif->mate->present) { 789 hwif_register(hwif); 790 } 791 } 792 } 793 if (hwif->io_ports[IDE_CONTROL_OFFSET] && hwif->reset) { 794 unsigned long timeout = jiffies + WAIT_WORSTCASE; 795 u8 stat; 796 797 printk(KERN_WARNING "%s: reset\n", hwif->name); 798 hwif->OUTB(12, hwif->io_ports[IDE_CONTROL_OFFSET]); 799 udelay(10); 800 hwif->OUTB(8, hwif->io_ports[IDE_CONTROL_OFFSET]); 801 do { 802 msleep(50); 803 stat = hwif->INB(hwif->io_ports[IDE_STATUS_OFFSET]); 804 } while ((stat & BUSY_STAT) && time_after(timeout, jiffies)); 805 806 } 807 local_irq_restore(flags); 808 /* 809 * Use cached IRQ number. It might be (and is...) changed by probe 810 * code above 811 */ 812 if (irqd) 813 enable_irq(irqd); 814 815 if (!hwif->present) { 816 ide_hwif_release_regions(hwif); 817 return; 818 } 819 820 if (hwif->fixup) 821 hwif->fixup(hwif); 822 823 for (unit = 0; unit < MAX_DRIVES; ++unit) { 824 ide_drive_t *drive = &hwif->drives[unit]; 825 826 if (drive->present) { 827 if (drive->autotune == IDE_TUNE_AUTO) 828 ide_set_max_pio(drive); 829 830 if (drive->autotune != IDE_TUNE_DEFAULT && 831 drive->autotune != IDE_TUNE_AUTO) 832 continue; 833 834 drive->nice1 = 1; 835 836 if (hwif->dma_host_on) 837 ide_set_dma(drive); 838 } 839 } 840 841 for (unit = 0; unit < MAX_DRIVES; ++unit) { 842 ide_drive_t *drive = &hwif->drives[unit]; 843 844 if (hwif->no_io_32bit) 845 drive->no_io_32bit = 1; 846 else 847 drive->no_io_32bit = drive->id->dword_io ? 1 : 0; 848 } 849} 850 851static int hwif_init(ide_hwif_t *hwif); 852static void hwif_register_devices(ide_hwif_t *hwif); 853 854static int probe_hwif_init(ide_hwif_t *hwif) 855{ 856 probe_hwif(hwif); 857 858 if (!hwif_init(hwif)) { 859 printk(KERN_INFO "%s: failed to initialize IDE interface\n", 860 hwif->name); 861 return -1; 862 } 863 864 if (hwif->present) 865 hwif_register_devices(hwif); 866 867 return 0; 868} 869 870#if MAX_HWIFS > 1 871/* 872 * save_match() is used to simplify logic in init_irq() below. 873 * 874 * A loophole here is that we may not know about a particular 875 * hwif's irq until after that hwif is actually probed/initialized.. 876 * This could be a problem for the case where an hwif is on a 877 * dual interface that requires serialization (eg. cmd640) and another 878 * hwif using one of the same irqs is initialized beforehand. 879 * 880 * This routine detects and reports such situations, but does not fix them. 881 */ 882static void save_match(ide_hwif_t *hwif, ide_hwif_t *new, ide_hwif_t **match) 883{ 884 ide_hwif_t *m = *match; 885 886 if (m && m->hwgroup && m->hwgroup != new->hwgroup) { 887 if (!new->hwgroup) 888 return; 889 printk("%s: potential irq problem with %s and %s\n", 890 hwif->name, new->name, m->name); 891 } 892 if (!m || m->irq != hwif->irq) /* don't undo a prior perfect match */ 893 *match = new; 894} 895#endif /* MAX_HWIFS > 1 */ 896 897/* 898 * init request queue 899 */ 900static int ide_init_queue(ide_drive_t *drive) 901{ 902 struct request_queue *q; 903 ide_hwif_t *hwif = HWIF(drive); 904 int max_sectors = 256; 905 int max_sg_entries = PRD_ENTRIES; 906 907 /* 908 * Our default set up assumes the normal IDE case, 909 * that is 64K segmenting, standard PRD setup 910 * and LBA28. Some drivers then impose their own 911 * limits and LBA48 we could raise it but as yet 912 * do not. 913 */ 914 915 q = blk_init_queue_node(do_ide_request, &ide_lock, hwif_to_node(hwif)); 916 if (!q) 917 return 1; 918 919 q->queuedata = drive; 920 blk_queue_segment_boundary(q, 0xffff); 921 922 if (!hwif->rqsize) { 923 if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) || 924 (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA)) 925 hwif->rqsize = 256; 926 else 927 hwif->rqsize = 65536; 928 } 929 if (hwif->rqsize < max_sectors) 930 max_sectors = hwif->rqsize; 931 blk_queue_max_sectors(q, max_sectors); 932 933#ifdef CONFIG_PCI 934 /* When we have an IOMMU, we may have a problem where pci_map_sg() 935 * creates segments that don't completely match our boundary 936 * requirements and thus need to be broken up again. Because it 937 * doesn't align properly either, we may actually have to break up 938 * to more segments than what was we got in the first place, a max 939 * worst case is twice as many. 940 * This will be fixed once we teach pci_map_sg() about our boundary 941 * requirements, hopefully soon. *FIXME* 942 */ 943 if (!PCI_DMA_BUS_IS_PHYS) 944 max_sg_entries >>= 1; 945#endif /* CONFIG_PCI */ 946 947 blk_queue_max_hw_segments(q, max_sg_entries); 948 blk_queue_max_phys_segments(q, max_sg_entries); 949 950 /* assign drive queue */ 951 drive->queue = q; 952 953 /* needs drive->queue to be set */ 954 ide_toggle_bounce(drive, 1); 955 956 return 0; 957} 958 959/* 960 * This routine sets up the irq for an ide interface, and creates a new 961 * hwgroup for the irq/hwif if none was previously assigned. 962 * 963 * Much of the code is for correctly detecting/handling irq sharing 964 * and irq serialization situations. This is somewhat complex because 965 * it handles static as well as dynamic (PCMCIA) IDE interfaces. 966 */ 967static int init_irq (ide_hwif_t *hwif) 968{ 969 unsigned int index; 970 ide_hwgroup_t *hwgroup; 971 ide_hwif_t *match = NULL; 972 973 974 BUG_ON(in_interrupt()); 975 BUG_ON(irqs_disabled()); 976 BUG_ON(hwif == NULL); 977 978 mutex_lock(&ide_cfg_mtx); 979 hwif->hwgroup = NULL; 980#if MAX_HWIFS > 1 981 /* 982 * Group up with any other hwifs that share our irq(s). 983 */ 984 for (index = 0; index < MAX_HWIFS; index++) { 985 ide_hwif_t *h = &ide_hwifs[index]; 986 if (h->hwgroup) { /* scan only initialized hwif's */ 987 if (hwif->irq == h->irq) { 988 hwif->sharing_irq = h->sharing_irq = 1; 989 if (hwif->chipset != ide_pci || 990 h->chipset != ide_pci) { 991 save_match(hwif, h, &match); 992 } 993 } 994 if (hwif->serialized) { 995 if (hwif->mate && hwif->mate->irq == h->irq) 996 save_match(hwif, h, &match); 997 } 998 if (h->serialized) { 999 if (h->mate && hwif->irq == h->mate->irq) 1000 save_match(hwif, h, &match); 1001 } 1002 } 1003 } 1004#endif /* MAX_HWIFS > 1 */ 1005 /* 1006 * If we are still without a hwgroup, then form a new one 1007 */ 1008 if (match) { 1009 hwgroup = match->hwgroup; 1010 hwif->hwgroup = hwgroup; 1011 /* 1012 * Link us into the hwgroup. 1013 * This must be done early, do ensure that unexpected_intr 1014 * can find the hwif and prevent irq storms. 1015 * No drives are attached to the new hwif, choose_drive 1016 * can't do anything stupid (yet). 1017 * Add ourself as the 2nd entry to the hwgroup->hwif 1018 * linked list, the first entry is the hwif that owns 1019 * hwgroup->handler - do not change that. 1020 */ 1021 spin_lock_irq(&ide_lock); 1022 hwif->next = hwgroup->hwif->next; 1023 hwgroup->hwif->next = hwif; 1024 spin_unlock_irq(&ide_lock); 1025 } else { 1026 hwgroup = kmalloc_node(sizeof(ide_hwgroup_t), 1027 GFP_KERNEL | __GFP_ZERO, 1028 hwif_to_node(hwif->drives[0].hwif)); 1029 if (!hwgroup) 1030 goto out_up; 1031 1032 hwif->hwgroup = hwgroup; 1033 1034 hwgroup->hwif = hwif->next = hwif; 1035 hwgroup->rq = NULL; 1036 hwgroup->handler = NULL; 1037 hwgroup->drive = NULL; 1038 hwgroup->busy = 0; 1039 init_timer(&hwgroup->timer); 1040 hwgroup->timer.function = &ide_timer_expiry; 1041 hwgroup->timer.data = (unsigned long) hwgroup; 1042 } 1043 1044 /* 1045 * Allocate the irq, if not already obtained for another hwif 1046 */ 1047 if (!match || match->irq != hwif->irq) { 1048 int sa = 0; 1049#if defined(__mc68000__) || defined(CONFIG_APUS) 1050 sa = IRQF_SHARED; 1051#endif /* __mc68000__ || CONFIG_APUS */ 1052 1053 if (IDE_CHIPSET_IS_PCI(hwif->chipset)) 1054 sa = IRQF_SHARED; 1055 1056 if (hwif->io_ports[IDE_CONTROL_OFFSET]) 1057 /* clear nIEN */ 1058 hwif->OUTB(0x08, hwif->io_ports[IDE_CONTROL_OFFSET]); 1059 1060 if (request_irq(hwif->irq,&ide_intr,sa,hwif->name,hwgroup)) 1061 goto out_unlink; 1062 } 1063 1064 /* 1065 * For any present drive: 1066 * - allocate the block device queue 1067 * - link drive into the hwgroup 1068 */ 1069 for (index = 0; index < MAX_DRIVES; ++index) { 1070 ide_drive_t *drive = &hwif->drives[index]; 1071 if (!drive->present) 1072 continue; 1073 if (ide_init_queue(drive)) { 1074 printk(KERN_ERR "ide: failed to init %s\n",drive->name); 1075 continue; 1076 } 1077 spin_lock_irq(&ide_lock); 1078 if (!hwgroup->drive) { 1079 /* first drive for hwgroup. */ 1080 drive->next = drive; 1081 hwgroup->drive = drive; 1082 hwgroup->hwif = HWIF(hwgroup->drive); 1083 } else { 1084 drive->next = hwgroup->drive->next; 1085 hwgroup->drive->next = drive; 1086 } 1087 spin_unlock_irq(&ide_lock); 1088 } 1089 1090#if !defined(__mc68000__) && !defined(CONFIG_APUS) 1091 printk("%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name, 1092 hwif->io_ports[IDE_DATA_OFFSET], 1093 hwif->io_ports[IDE_DATA_OFFSET]+7, 1094 hwif->io_ports[IDE_CONTROL_OFFSET], hwif->irq); 1095#else 1096 printk("%s at 0x%08lx on irq %d", hwif->name, 1097 hwif->io_ports[IDE_DATA_OFFSET], hwif->irq); 1098#endif /* __mc68000__ && CONFIG_APUS */ 1099 if (match) 1100 printk(" (%sed with %s)", 1101 hwif->sharing_irq ? "shar" : "serializ", match->name); 1102 printk("\n"); 1103 mutex_unlock(&ide_cfg_mtx); 1104 return 0; 1105out_unlink: 1106 spin_lock_irq(&ide_lock); 1107 if (hwif->next == hwif) { 1108 BUG_ON(match); 1109 BUG_ON(hwgroup->hwif != hwif); 1110 kfree(hwgroup); 1111 } else { 1112 ide_hwif_t *g; 1113 g = hwgroup->hwif; 1114 while (g->next != hwif) 1115 g = g->next; 1116 g->next = hwif->next; 1117 if (hwgroup->hwif == hwif) { 1118 /* Impossible. */ 1119 printk(KERN_ERR "Duh. Uninitialized hwif listed as active hwif.\n"); 1120 hwgroup->hwif = g; 1121 } 1122 BUG_ON(hwgroup->hwif == hwif); 1123 } 1124 spin_unlock_irq(&ide_lock); 1125out_up: 1126 mutex_unlock(&ide_cfg_mtx); 1127 return 1; 1128} 1129 1130static int ata_lock(dev_t dev, void *data) 1131{ 1132 /* FIXME: we want to pin hwif down */ 1133 return 0; 1134} 1135 1136static struct kobject *ata_probe(dev_t dev, int *part, void *data) 1137{ 1138 ide_hwif_t *hwif = data; 1139 int unit = *part >> PARTN_BITS; 1140 ide_drive_t *drive = &hwif->drives[unit]; 1141 if (!drive->present) 1142 return NULL; 1143 1144 if (drive->media == ide_disk) 1145 request_module("ide-disk"); 1146 if (drive->scsi) 1147 request_module("ide-scsi"); 1148 if (drive->media == ide_cdrom || drive->media == ide_optical) 1149 request_module("ide-cd"); 1150 if (drive->media == ide_tape) 1151 request_module("ide-tape"); 1152 if (drive->media == ide_floppy) 1153 request_module("ide-floppy"); 1154 1155 return NULL; 1156} 1157 1158static struct kobject *exact_match(dev_t dev, int *part, void *data) 1159{ 1160 struct gendisk *p = data; 1161 *part &= (1 << PARTN_BITS) - 1; 1162 return &p->dev.kobj; 1163} 1164 1165static int exact_lock(dev_t dev, void *data) 1166{ 1167 struct gendisk *p = data; 1168 1169 if (!get_disk(p)) 1170 return -1; 1171 return 0; 1172} 1173 1174void ide_register_region(struct gendisk *disk) 1175{ 1176 blk_register_region(MKDEV(disk->major, disk->first_minor), 1177 disk->minors, NULL, exact_match, exact_lock, disk); 1178} 1179 1180EXPORT_SYMBOL_GPL(ide_register_region); 1181 1182void ide_unregister_region(struct gendisk *disk) 1183{ 1184 blk_unregister_region(MKDEV(disk->major, disk->first_minor), 1185 disk->minors); 1186} 1187 1188EXPORT_SYMBOL_GPL(ide_unregister_region); 1189 1190void ide_init_disk(struct gendisk *disk, ide_drive_t *drive) 1191{ 1192 ide_hwif_t *hwif = drive->hwif; 1193 unsigned int unit = (drive->select.all >> 4) & 1; 1194 1195 disk->major = hwif->major; 1196 disk->first_minor = unit << PARTN_BITS; 1197 sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit); 1198 disk->queue = drive->queue; 1199} 1200 1201EXPORT_SYMBOL_GPL(ide_init_disk); 1202 1203static void ide_remove_drive_from_hwgroup(ide_drive_t *drive) 1204{ 1205 ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; 1206 1207 if (drive == drive->next) { 1208 /* special case: last drive from hwgroup. */ 1209 BUG_ON(hwgroup->drive != drive); 1210 hwgroup->drive = NULL; 1211 } else { 1212 ide_drive_t *walk; 1213 1214 walk = hwgroup->drive; 1215 while (walk->next != drive) 1216 walk = walk->next; 1217 walk->next = drive->next; 1218 if (hwgroup->drive == drive) { 1219 hwgroup->drive = drive->next; 1220 hwgroup->hwif = hwgroup->drive->hwif; 1221 } 1222 } 1223 BUG_ON(hwgroup->drive == drive); 1224} 1225 1226static void drive_release_dev (struct device *dev) 1227{ 1228 ide_drive_t *drive = container_of(dev, ide_drive_t, gendev); 1229 1230 spin_lock_irq(&ide_lock); 1231 ide_remove_drive_from_hwgroup(drive); 1232 kfree(drive->id); 1233 drive->id = NULL; 1234 drive->present = 0; 1235 /* Messed up locking ... */ 1236 spin_unlock_irq(&ide_lock); 1237 blk_cleanup_queue(drive->queue); 1238 spin_lock_irq(&ide_lock); 1239 drive->queue = NULL; 1240 spin_unlock_irq(&ide_lock); 1241 1242 complete(&drive->gendev_rel_comp); 1243} 1244 1245/* 1246 * init_gendisk() (as opposed to ide_geninit) is called for each major device, 1247 * after probing for drives, to allocate partition tables and other data 1248 * structures needed for the routines in genhd.c. ide_geninit() gets called 1249 * somewhat later, during the partition check. 1250 */ 1251static void init_gendisk (ide_hwif_t *hwif) 1252{ 1253 unsigned int unit; 1254 1255 for (unit = 0; unit < MAX_DRIVES; ++unit) { 1256 ide_drive_t * drive = &hwif->drives[unit]; 1257 ide_add_generic_settings(drive); 1258 snprintf(drive->gendev.bus_id,BUS_ID_SIZE,"%u.%u", 1259 hwif->index,unit); 1260 drive->gendev.parent = &hwif->gendev; 1261 drive->gendev.bus = &ide_bus_type; 1262 drive->gendev.driver_data = drive; 1263 drive->gendev.release = drive_release_dev; 1264 } 1265 blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS, 1266 THIS_MODULE, ata_probe, ata_lock, hwif); 1267} 1268 1269static int hwif_init(ide_hwif_t *hwif) 1270{ 1271 int old_irq; 1272 1273 /* Return success if no device is connected */ 1274 if (!hwif->present) 1275 return 1; 1276 1277 if (!hwif->irq) { 1278 if (!(hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET]))) 1279 { 1280 printk("%s: DISABLED, NO IRQ\n", hwif->name); 1281 return (hwif->present = 0); 1282 } 1283 } 1284#ifdef CONFIG_BLK_DEV_HD 1285 if (hwif->irq == HD_IRQ && hwif->io_ports[IDE_DATA_OFFSET] != HD_DATA) { 1286 printk("%s: CANNOT SHARE IRQ WITH OLD " 1287 "HARDDISK DRIVER (hd.c)\n", hwif->name); 1288 return (hwif->present = 0); 1289 } 1290#endif /* CONFIG_BLK_DEV_HD */ 1291 1292 /* we set it back to 1 if all is ok below */ 1293 hwif->present = 0; 1294 1295 if (register_blkdev(hwif->major, hwif->name)) 1296 return 0; 1297 1298 if (!hwif->sg_max_nents) 1299 hwif->sg_max_nents = PRD_ENTRIES; 1300 1301 hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents, 1302 GFP_KERNEL); 1303 if (!hwif->sg_table) { 1304 printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name); 1305 goto out; 1306 } 1307 1308 sg_init_table(hwif->sg_table, hwif->sg_max_nents); 1309 1310 if (init_irq(hwif) == 0) 1311 goto done; 1312 1313 old_irq = hwif->irq; 1314 /* 1315 * It failed to initialise. Find the default IRQ for 1316 * this port and try that. 1317 */ 1318 if (!(hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET]))) { 1319 printk("%s: Disabled unable to get IRQ %d.\n", 1320 hwif->name, old_irq); 1321 goto out; 1322 } 1323 if (init_irq(hwif)) { 1324 printk("%s: probed IRQ %d and default IRQ %d failed.\n", 1325 hwif->name, old_irq, hwif->irq); 1326 goto out; 1327 } 1328 printk("%s: probed IRQ %d failed, using default.\n", 1329 hwif->name, hwif->irq); 1330 1331done: 1332 init_gendisk(hwif); 1333 1334 ide_acpi_init(hwif); 1335 1336 hwif->present = 1; /* success */ 1337 return 1; 1338 1339out: 1340 unregister_blkdev(hwif->major, hwif->name); 1341 return 0; 1342} 1343 1344static void hwif_register_devices(ide_hwif_t *hwif) 1345{ 1346 unsigned int i; 1347 1348 for (i = 0; i < MAX_DRIVES; i++) { 1349 ide_drive_t *drive = &hwif->drives[i]; 1350 1351 if (drive->present) { 1352 int ret = device_register(&drive->gendev); 1353 1354 if (ret < 0) 1355 printk(KERN_WARNING "IDE: %s: " 1356 "device_register error: %d\n", 1357 __FUNCTION__, ret); 1358 } 1359 } 1360} 1361 1362int ideprobe_init (void) 1363{ 1364 unsigned int index; 1365 int probe[MAX_HWIFS]; 1366 1367 memset(probe, 0, MAX_HWIFS * sizeof(int)); 1368 for (index = 0; index < MAX_HWIFS; ++index) 1369 probe[index] = !ide_hwifs[index].present; 1370 1371 for (index = 0; index < MAX_HWIFS; ++index) 1372 if (probe[index]) 1373 probe_hwif(&ide_hwifs[index]); 1374 for (index = 0; index < MAX_HWIFS; ++index) 1375 if (probe[index]) 1376 hwif_init(&ide_hwifs[index]); 1377 for (index = 0; index < MAX_HWIFS; ++index) { 1378 if (probe[index]) { 1379 ide_hwif_t *hwif = &ide_hwifs[index]; 1380 if (!hwif->present) 1381 continue; 1382 if (hwif->chipset == ide_unknown || hwif->chipset == ide_forced) 1383 hwif->chipset = ide_generic; 1384 hwif_register_devices(hwif); 1385 } 1386 } 1387 for (index = 0; index < MAX_HWIFS; ++index) 1388 if (probe[index]) 1389 ide_proc_register_port(&ide_hwifs[index]); 1390 return 0; 1391} 1392 1393EXPORT_SYMBOL_GPL(ideprobe_init); 1394 1395int ide_device_add(u8 idx[4]) 1396{ 1397 int i, rc = 0; 1398 1399 for (i = 0; i < 4; i++) { 1400 if (idx[i] != 0xff) 1401 rc |= probe_hwif_init(&ide_hwifs[idx[i]]); 1402 } 1403 1404 for (i = 0; i < 4; i++) { 1405 if (idx[i] != 0xff) 1406 ide_proc_register_port(&ide_hwifs[idx[i]]); 1407 } 1408 1409 return rc; 1410} 1411 1412EXPORT_SYMBOL_GPL(ide_device_add); 1413