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 * Version 1.00 move drive probing code from ide.c to ide-probe.c 17 * Version 1.01 fix compilation problem for m68k 18 * Version 1.02 increase WAIT_PIDENTIFY to avoid CD-ROM locking at boot 19 * by Andrea Arcangeli 20 * Version 1.03 fix for (hwif->chipset == ide_4drives) 21 * Version 1.04 fixed buggy treatments of known flash memory cards 22 * 23 * Version 1.05 fix for (hwif->chipset == ide_pdc4030) 24 * added ide6/7/8/9 25 * allowed for secondary flash card to be detectable 26 * with new flag : drive->ata_flash : 1; 27 * Version 1.06 stream line request queue and prep for cascade project. 28 * Version 1.07 max_sect <= 255; slower disks would get behind and 29 * then fall over when they get to 256. Paul G. 30 * Version 1.10 Update set for new IDE. drive->id is now always 31 * valid after probe time even with noprobe 32 */ 33 34#include <linux/module.h> 35#include <linux/types.h> 36#include <linux/string.h> 37#include <linux/kernel.h> 38#include <linux/timer.h> 39#include <linux/mm.h> 40#include <linux/interrupt.h> 41#include <linux/major.h> 42#include <linux/errno.h> 43#include <linux/genhd.h> 44#include <linux/slab.h> 45#include <linux/delay.h> 46#include <linux/ide.h> 47#include <linux/spinlock.h> 48#include <linux/kmod.h> 49#include <linux/pci.h> 50 51#include <asm/byteorder.h> 52#include <asm/irq.h> 53#include <asm/uaccess.h> 54#include <asm/io.h> 55 56/** 57 * generic_id - add a generic drive id 58 * @drive: drive to make an ID block for 59 * 60 * Add a fake id field to the drive we are passed. This allows 61 * use to skip a ton of NULL checks (which people always miss) 62 * and make drive properties unconditional outside of this file 63 */ 64 65static void generic_id(ide_drive_t *drive) 66{ 67 drive->id->cyls = drive->cyl; 68 drive->id->heads = drive->head; 69 drive->id->sectors = drive->sect; 70 drive->id->cur_cyls = drive->cyl; 71 drive->id->cur_heads = drive->head; 72 drive->id->cur_sectors = drive->sect; 73} 74 75static void ide_disk_init_chs(ide_drive_t *drive) 76{ 77 struct hd_driveid *id = drive->id; 78 79 /* Extract geometry if we did not already have one for the drive */ 80 if (!drive->cyl || !drive->head || !drive->sect) { 81 drive->cyl = drive->bios_cyl = id->cyls; 82 drive->head = drive->bios_head = id->heads; 83 drive->sect = drive->bios_sect = id->sectors; 84 } 85 86 /* Handle logical geometry translation by the drive */ 87 if ((id->field_valid & 1) && id->cur_cyls && 88 id->cur_heads && (id->cur_heads <= 16) && id->cur_sectors) { 89 drive->cyl = id->cur_cyls; 90 drive->head = id->cur_heads; 91 drive->sect = id->cur_sectors; 92 } 93 94 /* Use physical geometry if what we have still makes no sense */ 95 if (drive->head > 16 && id->heads && id->heads <= 16) { 96 drive->cyl = id->cyls; 97 drive->head = id->heads; 98 drive->sect = id->sectors; 99 } 100} 101 102static void ide_disk_init_mult_count(ide_drive_t *drive) 103{ 104 struct hd_driveid *id = drive->id; 105 106 drive->mult_count = 0; 107 if (id->max_multsect) { 108#ifdef CONFIG_IDEDISK_MULTI_MODE 109 id->multsect = ((id->max_multsect/2) > 1) ? id->max_multsect : 0; 110 id->multsect_valid = id->multsect ? 1 : 0; 111 drive->mult_req = id->multsect_valid ? id->max_multsect : INITIAL_MULT_COUNT; 112 drive->special.b.set_multmode = drive->mult_req ? 1 : 0; 113#else /* original, pre IDE-NFG, per request of AC */ 114 drive->mult_req = INITIAL_MULT_COUNT; 115 if (drive->mult_req > id->max_multsect) 116 drive->mult_req = id->max_multsect; 117 if (drive->mult_req || ((id->multsect_valid & 1) && id->multsect)) 118 drive->special.b.set_multmode = 1; 119#endif 120 } 121} 122 123/** 124 * do_identify - identify a drive 125 * @drive: drive to identify 126 * @cmd: command used 127 * 128 * Called when we have issued a drive identify command to 129 * read and parse the results. This function is run with 130 * interrupts disabled. 131 */ 132 133static inline void do_identify (ide_drive_t *drive, u8 cmd) 134{ 135 ide_hwif_t *hwif = HWIF(drive); 136 int bswap = 1; 137 struct hd_driveid *id; 138 139 id = drive->id; 140 /* read 512 bytes of id info */ 141 hwif->ata_input_data(drive, id, SECTOR_WORDS); 142 143 drive->id_read = 1; 144 local_irq_enable(); 145 ide_fix_driveid(id); 146 147#if defined(CONFIG_SCSI_EATA_DMA) || defined(CONFIG_SCSI_EATA_PIO) || \ 148 defined(CONFIG_SCSI_EATA) 149 /* 150 * EATA SCSI controllers do a hardware ATA emulation: 151 * Ignore them if there is a driver for them available. 152 */ 153 if ((id->model[0] == 'P' && id->model[1] == 'M') || 154 (id->model[0] == 'S' && id->model[1] == 'K')) { 155 printk("%s: EATA SCSI HBA %.10s\n", drive->name, id->model); 156 goto err_misc; 157 } 158#endif /* CONFIG_SCSI_EATA_DMA || CONFIG_SCSI_EATA_PIO */ 159 160 /* 161 * WIN_IDENTIFY returns little-endian info, 162 * WIN_PIDENTIFY *usually* returns little-endian info. 163 */ 164 if (cmd == WIN_PIDENTIFY) { 165 if ((id->model[0] == 'N' && id->model[1] == 'E') /* NEC */ 166 || (id->model[0] == 'F' && id->model[1] == 'X') /* Mitsumi */ 167 || (id->model[0] == 'P' && id->model[1] == 'i'))/* Pioneer */ 168 /* Vertos drives may still be weird */ 169 bswap ^= 1; 170 } 171 ide_fixstring(id->model, sizeof(id->model), bswap); 172 ide_fixstring(id->fw_rev, sizeof(id->fw_rev), bswap); 173 ide_fixstring(id->serial_no, sizeof(id->serial_no), bswap); 174 175 if (strstr(id->model, "E X A B Y T E N E S T")) 176 goto err_misc; 177 178 /* we depend on this a lot! */ 179 id->model[sizeof(id->model)-1] = '\0'; 180 printk("%s: %s, ", drive->name, id->model); 181 drive->present = 1; 182 drive->dead = 0; 183 184 /* 185 * Check for an ATAPI device 186 */ 187 if (cmd == WIN_PIDENTIFY) { 188 u8 type = (id->config >> 8) & 0x1f; 189 printk("ATAPI "); 190 switch (type) { 191 case ide_floppy: 192 if (!strstr(id->model, "CD-ROM")) { 193 if (!strstr(id->model, "oppy") && 194 !strstr(id->model, "poyp") && 195 !strstr(id->model, "ZIP")) 196 printk("cdrom or floppy?, assuming "); 197 if (drive->media != ide_cdrom) { 198 printk ("FLOPPY"); 199 drive->removable = 1; 200 break; 201 } 202 } 203 /* Early cdrom models used zero */ 204 type = ide_cdrom; 205 case ide_cdrom: 206 drive->removable = 1; 207#ifdef CONFIG_PPC 208 /* kludge for Apple PowerBook internal zip */ 209 if (!strstr(id->model, "CD-ROM") && 210 strstr(id->model, "ZIP")) { 211 printk ("FLOPPY"); 212 type = ide_floppy; 213 break; 214 } 215#endif 216 printk ("CD/DVD-ROM"); 217 break; 218 case ide_tape: 219 printk ("TAPE"); 220 break; 221 case ide_optical: 222 printk ("OPTICAL"); 223 drive->removable = 1; 224 break; 225 default: 226 printk("UNKNOWN (type %d)", type); 227 break; 228 } 229 printk (" drive\n"); 230 drive->media = type; 231 /* an ATAPI device ignores DRDY */ 232 drive->ready_stat = 0; 233 return; 234 } 235 236 /* 237 * Not an ATAPI device: looks like a "regular" hard disk 238 */ 239 240 /* 241 * 0x848a = CompactFlash device 242 * These are *not* removable in Linux definition of the term 243 */ 244 245 if ((id->config != 0x848a) && (id->config & (1<<7))) 246 drive->removable = 1; 247 248 drive->media = ide_disk; 249 printk("%s DISK drive\n", (id->config == 0x848a) ? "CFA" : "ATA" ); 250 QUIRK_LIST(drive); 251 return; 252 253err_misc: 254 kfree(id); 255 drive->present = 0; 256 return; 257} 258 259/** 260 * actual_try_to_identify - send ata/atapi identify 261 * @drive: drive to identify 262 * @cmd: command to use 263 * 264 * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive 265 * and waits for a response. It also monitors irqs while this is 266 * happening, in hope of automatically determining which one is 267 * being used by the interface. 268 * 269 * Returns: 0 device was identified 270 * 1 device timed-out (no response to identify request) 271 * 2 device aborted the command (refused to identify itself) 272 */ 273 274static int actual_try_to_identify (ide_drive_t *drive, u8 cmd) 275{ 276 ide_hwif_t *hwif = HWIF(drive); 277 int rc; 278 unsigned long hd_status; 279 unsigned long timeout; 280 u8 s = 0, a = 0; 281 282 /* take a deep breath */ 283 msleep(50); 284 285 if (IDE_CONTROL_REG) { 286 a = hwif->INB(IDE_ALTSTATUS_REG); 287 s = hwif->INB(IDE_STATUS_REG); 288 if ((a ^ s) & ~INDEX_STAT) { 289 printk(KERN_INFO "%s: probing with STATUS(0x%02x) instead of " 290 "ALTSTATUS(0x%02x)\n", drive->name, s, a); 291 /* ancient Seagate drives, broken interfaces */ 292 hd_status = IDE_STATUS_REG; 293 } else { 294 /* use non-intrusive polling */ 295 hd_status = IDE_ALTSTATUS_REG; 296 } 297 } else 298 hd_status = IDE_STATUS_REG; 299 300 /* set features register for atapi 301 * identify command to be sure of reply 302 */ 303 if ((cmd == WIN_PIDENTIFY)) 304 /* disable dma & overlap */ 305 hwif->OUTB(0, IDE_FEATURE_REG); 306 307 /* ask drive for ID */ 308 hwif->OUTB(cmd, IDE_COMMAND_REG); 309 310 timeout = ((cmd == WIN_IDENTIFY) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2; 311 timeout += jiffies; 312 do { 313 if (time_after(jiffies, timeout)) { 314 /* drive timed-out */ 315 return 1; 316 } 317 /* give drive a breather */ 318 msleep(50); 319 } while ((hwif->INB(hd_status)) & BUSY_STAT); 320 321 /* wait for IRQ and DRQ_STAT */ 322 msleep(50); 323 if (OK_STAT((hwif->INB(IDE_STATUS_REG)), DRQ_STAT, BAD_R_STAT)) { 324 unsigned long flags; 325 326 /* local CPU only; some systems need this */ 327 local_irq_save(flags); 328 /* drive returned ID */ 329 do_identify(drive, cmd); 330 /* drive responded with ID */ 331 rc = 0; 332 /* clear drive IRQ */ 333 (void) hwif->INB(IDE_STATUS_REG); 334 local_irq_restore(flags); 335 } else { 336 /* drive refused ID */ 337 rc = 2; 338 } 339 return rc; 340} 341 342/** 343 * try_to_identify - try to identify a drive 344 * @drive: drive to probe 345 * @cmd: command to use 346 * 347 * Issue the identify command and then do IRQ probing to 348 * complete the identification when needed by finding the 349 * IRQ the drive is attached to 350 */ 351 352static int try_to_identify (ide_drive_t *drive, u8 cmd) 353{ 354 ide_hwif_t *hwif = HWIF(drive); 355 int retval; 356 int autoprobe = 0; 357 unsigned long cookie = 0; 358 359 /* 360 * Disable device irq unless we need to 361 * probe for it. Otherwise we'll get spurious 362 * interrupts during the identify-phase that 363 * the irq handler isn't expecting. 364 */ 365 if (IDE_CONTROL_REG) { 366 u8 ctl = drive->ctl | 2; 367 if (!hwif->irq) { 368 autoprobe = 1; 369 cookie = probe_irq_on(); 370 /* enable device irq */ 371 ctl &= ~2; 372 } 373 hwif->OUTB(ctl, IDE_CONTROL_REG); 374 } 375 376 retval = actual_try_to_identify(drive, cmd); 377 378 if (autoprobe) { 379 int irq; 380 /* mask device irq */ 381 hwif->OUTB(drive->ctl|2, IDE_CONTROL_REG); 382 /* clear drive IRQ */ 383 (void) hwif->INB(IDE_STATUS_REG); 384 udelay(5); 385 irq = probe_irq_off(cookie); 386 if (!hwif->irq) { 387 if (irq > 0) { 388 hwif->irq = irq; 389 } else { 390 /* Mmmm.. multiple IRQs.. 391 * don't know which was ours 392 */ 393 printk("%s: IRQ probe failed (0x%lx)\n", 394 drive->name, cookie); 395 } 396 } 397 } 398 return retval; 399} 400 401 402/** 403 * do_probe - probe an IDE device 404 * @drive: drive to probe 405 * @cmd: command to use 406 * 407 * do_probe() has the difficult job of finding a drive if it exists, 408 * without getting hung up if it doesn't exist, without trampling on 409 * ethernet cards, and without leaving any IRQs dangling to haunt us later. 410 * 411 * If a drive is "known" to exist (from CMOS or kernel parameters), 412 * but does not respond right away, the probe will "hang in there" 413 * for the maximum wait time (about 30 seconds), otherwise it will 414 * exit much more quickly. 415 * 416 * Returns: 0 device was identified 417 * 1 device timed-out (no response to identify request) 418 * 2 device aborted the command (refused to identify itself) 419 * 3 bad status from device (possible for ATAPI drives) 420 * 4 probe was not attempted because failure was obvious 421 */ 422 423static int do_probe (ide_drive_t *drive, u8 cmd) 424{ 425 int rc; 426 ide_hwif_t *hwif = HWIF(drive); 427 428 if (drive->present) { 429 /* avoid waiting for inappropriate probes */ 430 if ((drive->media != ide_disk) && (cmd == WIN_IDENTIFY)) 431 return 4; 432 } 433#ifdef DEBUG 434 printk("probing for %s: present=%d, media=%d, probetype=%s\n", 435 drive->name, drive->present, drive->media, 436 (cmd == WIN_IDENTIFY) ? "ATA" : "ATAPI"); 437#endif 438 439 /* needed for some systems 440 * (e.g. crw9624 as drive0 with disk as slave) 441 */ 442 msleep(50); 443 SELECT_DRIVE(drive); 444 msleep(50); 445 if (hwif->INB(IDE_SELECT_REG) != drive->select.all && !drive->present) { 446 if (drive->select.b.unit != 0) { 447 /* exit with drive0 selected */ 448 SELECT_DRIVE(&hwif->drives[0]); 449 /* allow BUSY_STAT to assert & clear */ 450 msleep(50); 451 } 452 /* no i/f present: mmm.. this should be a 4 -ml */ 453 return 3; 454 } 455 456 if (OK_STAT((hwif->INB(IDE_STATUS_REG)), READY_STAT, BUSY_STAT) || 457 drive->present || cmd == WIN_PIDENTIFY) { 458 /* send cmd and wait */ 459 if ((rc = try_to_identify(drive, cmd))) { 460 /* failed: try again */ 461 rc = try_to_identify(drive,cmd); 462 } 463 if (hwif->INB(IDE_STATUS_REG) == (BUSY_STAT|READY_STAT)) 464 return 4; 465 466 if ((rc == 1 && cmd == WIN_PIDENTIFY) && 467 ((drive->autotune == IDE_TUNE_DEFAULT) || 468 (drive->autotune == IDE_TUNE_AUTO))) { 469 unsigned long timeout; 470 printk("%s: no response (status = 0x%02x), " 471 "resetting drive\n", drive->name, 472 hwif->INB(IDE_STATUS_REG)); 473 msleep(50); 474 hwif->OUTB(drive->select.all, IDE_SELECT_REG); 475 msleep(50); 476 hwif->OUTB(WIN_SRST, IDE_COMMAND_REG); 477 timeout = jiffies; 478 while (((hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && 479 time_before(jiffies, timeout + WAIT_WORSTCASE)) 480 msleep(50); 481 rc = try_to_identify(drive, cmd); 482 } 483 if (rc == 1) 484 printk("%s: no response (status = 0x%02x)\n", 485 drive->name, hwif->INB(IDE_STATUS_REG)); 486 /* ensure drive irq is clear */ 487 (void) hwif->INB(IDE_STATUS_REG); 488 } else { 489 /* not present or maybe ATAPI */ 490 rc = 3; 491 } 492 if (drive->select.b.unit != 0) { 493 /* exit with drive0 selected */ 494 SELECT_DRIVE(&hwif->drives[0]); 495 msleep(50); 496 /* ensure drive irq is clear */ 497 (void) hwif->INB(IDE_STATUS_REG); 498 } 499 return rc; 500} 501 502/* 503 * 504 */ 505static void enable_nest (ide_drive_t *drive) 506{ 507 ide_hwif_t *hwif = HWIF(drive); 508 unsigned long timeout; 509 510 printk("%s: enabling %s -- ", hwif->name, drive->id->model); 511 SELECT_DRIVE(drive); 512 msleep(50); 513 hwif->OUTB(EXABYTE_ENABLE_NEST, IDE_COMMAND_REG); 514 timeout = jiffies + WAIT_WORSTCASE; 515 do { 516 if (time_after(jiffies, timeout)) { 517 printk("failed (timeout)\n"); 518 return; 519 } 520 msleep(50); 521 } while ((hwif->INB(IDE_STATUS_REG)) & BUSY_STAT); 522 523 msleep(50); 524 525 if (!OK_STAT((hwif->INB(IDE_STATUS_REG)), 0, BAD_STAT)) { 526 printk("failed (status = 0x%02x)\n", hwif->INB(IDE_STATUS_REG)); 527 } else { 528 printk("success\n"); 529 } 530 531 /* if !(success||timed-out) */ 532 if (do_probe(drive, WIN_IDENTIFY) >= 2) { 533 /* look for ATAPI device */ 534 (void) do_probe(drive, WIN_PIDENTIFY); 535 } 536} 537 538/** 539 * probe_for_drives - upper level drive probe 540 * @drive: drive to probe for 541 * 542 * probe_for_drive() tests for existence of a given drive using do_probe() 543 * and presents things to the user as needed. 544 * 545 * Returns: 0 no device was found 546 * 1 device was found (note: drive->present might 547 * still be 0) 548 */ 549 550static inline u8 probe_for_drive (ide_drive_t *drive) 551{ 552 /* 553 * In order to keep things simple we have an id 554 * block for all drives at all times. If the device 555 * is pre ATA or refuses ATA/ATAPI identify we 556 * will add faked data to this. 557 * 558 * Also note that 0 everywhere means "can't do X" 559 */ 560 561 drive->id = kzalloc(SECTOR_WORDS *4, GFP_KERNEL); 562 drive->id_read = 0; 563 if(drive->id == NULL) 564 { 565 printk(KERN_ERR "ide: out of memory for id data.\n"); 566 return 0; 567 } 568 strcpy(drive->id->model, "UNKNOWN"); 569 570 /* skip probing? */ 571 if (!drive->noprobe) 572 { 573 /* if !(success||timed-out) */ 574 if (do_probe(drive, WIN_IDENTIFY) >= 2) { 575 /* look for ATAPI device */ 576 (void) do_probe(drive, WIN_PIDENTIFY); 577 } 578 if (!drive->present) 579 /* drive not found */ 580 return 0; 581 if (strstr(drive->id->model, "E X A B Y T E N E S T")) 582 enable_nest(drive); 583 584 /* identification failed? */ 585 if (!drive->id_read) { 586 if (drive->media == ide_disk) { 587 printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n", 588 drive->name, drive->cyl, 589 drive->head, drive->sect); 590 } else if (drive->media == ide_cdrom) { 591 printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name); 592 } else { 593 /* nuke it */ 594 printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name); 595 drive->present = 0; 596 } 597 } 598 /* drive was found */ 599 } 600 if(!drive->present) 601 return 0; 602 /* The drive wasn't being helpful. Add generic info only */ 603 if (drive->id_read == 0) { 604 generic_id(drive); 605 return 1; 606 } 607 608 if (drive->media == ide_disk) { 609 ide_disk_init_chs(drive); 610 ide_disk_init_mult_count(drive); 611 } 612 613 return drive->present; 614} 615 616static void hwif_release_dev (struct device *dev) 617{ 618 ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev); 619 620 complete(&hwif->gendev_rel_comp); 621} 622 623static void hwif_register (ide_hwif_t *hwif) 624{ 625 int ret; 626 627 /* register with global device tree */ 628 strlcpy(hwif->gendev.bus_id,hwif->name,BUS_ID_SIZE); 629 hwif->gendev.driver_data = hwif; 630 if (hwif->gendev.parent == NULL) { 631 if (hwif->pci_dev) 632 hwif->gendev.parent = &hwif->pci_dev->dev; 633 else 634 /* Would like to do = &device_legacy */ 635 hwif->gendev.parent = NULL; 636 } 637 hwif->gendev.release = hwif_release_dev; 638 ret = device_register(&hwif->gendev); 639 if (ret < 0) 640 printk(KERN_WARNING "IDE: %s: device_register error: %d\n", 641 __FUNCTION__, ret); 642} 643 644static int wait_hwif_ready(ide_hwif_t *hwif) 645{ 646 int rc; 647 648 printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name); 649 650 /* Let HW settle down a bit from whatever init state we 651 * come from */ 652 mdelay(2); 653 654 /* Wait for BSY bit to go away, spec timeout is 30 seconds, 655 * I know of at least one disk who takes 31 seconds, I use 35 656 * here to be safe 657 */ 658 rc = ide_wait_not_busy(hwif, 35000); 659 if (rc) 660 return rc; 661 662 /* Now make sure both master & slave are ready */ 663 SELECT_DRIVE(&hwif->drives[0]); 664 hwif->OUTB(8, hwif->io_ports[IDE_CONTROL_OFFSET]); 665 mdelay(2); 666 rc = ide_wait_not_busy(hwif, 35000); 667 if (rc) 668 return rc; 669 SELECT_DRIVE(&hwif->drives[1]); 670 hwif->OUTB(8, hwif->io_ports[IDE_CONTROL_OFFSET]); 671 mdelay(2); 672 rc = ide_wait_not_busy(hwif, 35000); 673 674 /* Exit function with master reselected (let's be sane) */ 675 SELECT_DRIVE(&hwif->drives[0]); 676 677 return rc; 678} 679 680/** 681 * ide_undecoded_slave - look for bad CF adapters 682 * @hwif: interface 683 * 684 * Analyse the drives on the interface and attempt to decide if we 685 * have the same drive viewed twice. This occurs with crap CF adapters 686 * and PCMCIA sometimes. 687 */ 688 689void ide_undecoded_slave(ide_hwif_t *hwif) 690{ 691 ide_drive_t *drive0 = &hwif->drives[0]; 692 ide_drive_t *drive1 = &hwif->drives[1]; 693 694 if (drive0->present == 0 || drive1->present == 0) 695 return; 696 697 /* If the models don't match they are not the same product */ 698 if (strcmp(drive0->id->model, drive1->id->model)) 699 return; 700 701 /* Serial numbers do not match */ 702 if (strncmp(drive0->id->serial_no, drive1->id->serial_no, 20)) 703 return; 704 705 /* No serial number, thankfully very rare for CF */ 706 if (drive0->id->serial_no[0] == 0) 707 return; 708 709 /* Appears to be an IDE flash adapter with decode bugs */ 710 printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n"); 711 712 drive1->present = 0; 713} 714 715EXPORT_SYMBOL_GPL(ide_undecoded_slave); 716 717/* 718 * This routine only knows how to look for drive units 0 and 1 719 * on an interface, so any setting of MAX_DRIVES > 2 won't work here. 720 */ 721static void probe_hwif(ide_hwif_t *hwif, void (*fixup)(ide_hwif_t *hwif)) 722{ 723 unsigned int unit; 724 unsigned long flags; 725 unsigned int irqd; 726 727 if (hwif->noprobe) 728 return; 729 730 if ((hwif->chipset != ide_4drives || !hwif->mate || !hwif->mate->present) && 731 (ide_hwif_request_regions(hwif))) { 732 u16 msgout = 0; 733 for (unit = 0; unit < MAX_DRIVES; ++unit) { 734 ide_drive_t *drive = &hwif->drives[unit]; 735 if (drive->present) { 736 drive->present = 0; 737 printk(KERN_ERR "%s: ERROR, PORTS ALREADY IN USE\n", 738 drive->name); 739 msgout = 1; 740 } 741 } 742 if (!msgout) 743 printk(KERN_ERR "%s: ports already in use, skipping probe\n", 744 hwif->name); 745 return; 746 } 747 748 /* 749 * We must always disable IRQ, as probe_for_drive will assert IRQ, but 750 * we'll install our IRQ driver much later... 751 */ 752 irqd = hwif->irq; 753 if (irqd) 754 disable_irq(hwif->irq); 755 756 local_irq_set(flags); 757 758 /* This is needed on some PPCs and a bunch of BIOS-less embedded 759 * platforms. Typical cases are: 760 * 761 * - The firmware hard reset the disk before booting the kernel, 762 * the drive is still doing it's poweron-reset sequence, that 763 * can take up to 30 seconds 764 * - The firmware does nothing (or no firmware), the device is 765 * still in POST state (same as above actually). 766 * - Some CD/DVD/Writer combo drives tend to drive the bus during 767 * their reset sequence even when they are non-selected slave 768 * devices, thus preventing discovery of the main HD 769 * 770 * Doing this wait-for-busy should not harm any existing configuration 771 * (at least things won't be worse than what current code does, that 772 * is blindly go & talk to the drive) and fix some issues like the 773 * above. 774 * 775 * BenH. 776 */ 777 if (wait_hwif_ready(hwif) == -EBUSY) 778 printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name); 779 780 /* 781 * Second drive should only exist if first drive was found, 782 * but a lot of cdrom drives are configured as single slaves. 783 */ 784 for (unit = 0; unit < MAX_DRIVES; ++unit) { 785 ide_drive_t *drive = &hwif->drives[unit]; 786 drive->dn = (hwif->channel ? 2 : 0) + unit; 787 (void) probe_for_drive(drive); 788 if (drive->present && !hwif->present) { 789 hwif->present = 1; 790 if (hwif->chipset != ide_4drives || 791 !hwif->mate || 792 !hwif->mate->present) { 793 hwif_register(hwif); 794 } 795 } 796 } 797 if (hwif->io_ports[IDE_CONTROL_OFFSET] && hwif->reset) { 798 unsigned long timeout = jiffies + WAIT_WORSTCASE; 799 u8 stat; 800 801 printk(KERN_WARNING "%s: reset\n", hwif->name); 802 hwif->OUTB(12, hwif->io_ports[IDE_CONTROL_OFFSET]); 803 udelay(10); 804 hwif->OUTB(8, hwif->io_ports[IDE_CONTROL_OFFSET]); 805 do { 806 msleep(50); 807 stat = hwif->INB(hwif->io_ports[IDE_STATUS_OFFSET]); 808 } while ((stat & BUSY_STAT) && time_after(timeout, jiffies)); 809 810 } 811 local_irq_restore(flags); 812 /* 813 * Use cached IRQ number. It might be (and is...) changed by probe 814 * code above 815 */ 816 if (irqd) 817 enable_irq(irqd); 818 819 if (!hwif->present) { 820 ide_hwif_release_regions(hwif); 821 return; 822 } 823 824 if (fixup) 825 fixup(hwif); 826 827 for (unit = 0; unit < MAX_DRIVES; ++unit) { 828 ide_drive_t *drive = &hwif->drives[unit]; 829 830 if (drive->present) { 831 if (hwif->tuneproc != NULL && 832 drive->autotune == IDE_TUNE_AUTO) 833 /* auto-tune PIO mode */ 834 hwif->tuneproc(drive, 255); 835 836 if (drive->autotune != IDE_TUNE_DEFAULT && 837 drive->autotune != IDE_TUNE_AUTO) 838 continue; 839 840 drive->nice1 = 1; 841 842 /* 843 * Move here to prevent module loading clashing. 844 */ 845 // drive->autodma = hwif->autodma; 846 if (hwif->ide_dma_check) { 847 /* 848 * Force DMAing for the beginning of the check. 849 * Some chipsets appear to do interesting 850 * things, if not checked and cleared. 851 * PARANOIA!!! 852 */ 853 hwif->dma_off_quietly(drive); 854#ifdef CONFIG_IDEDMA_ONLYDISK 855 if (drive->media == ide_disk) 856#endif 857 ide_set_dma(drive); 858 } 859 } 860 } 861 862 for (unit = 0; unit < MAX_DRIVES; ++unit) { 863 ide_drive_t *drive = &hwif->drives[unit]; 864 865 if (hwif->no_io_32bit) 866 drive->no_io_32bit = 1; 867 else 868 drive->no_io_32bit = drive->id->dword_io ? 1 : 0; 869 } 870} 871 872static int hwif_init(ide_hwif_t *hwif); 873 874int probe_hwif_init_with_fixup(ide_hwif_t *hwif, void (*fixup)(ide_hwif_t *hwif)) 875{ 876 probe_hwif(hwif, fixup); 877 878 if (!hwif_init(hwif)) { 879 printk(KERN_INFO "%s: failed to initialize IDE interface\n", 880 hwif->name); 881 return -1; 882 } 883 884 if (hwif->present) { 885 u16 unit = 0; 886 int ret; 887 888 for (unit = 0; unit < MAX_DRIVES; ++unit) { 889 ide_drive_t *drive = &hwif->drives[unit]; 890 /* For now don't attach absent drives, we may 891 want them on default or a new "empty" class 892 for hotplug reprobing ? */ 893 if (drive->present) { 894 ret = device_register(&drive->gendev); 895 if (ret < 0) 896 printk(KERN_WARNING "IDE: %s: " 897 "device_register error: %d\n", 898 __FUNCTION__, ret); 899 } 900 } 901 } 902 return 0; 903} 904 905int probe_hwif_init(ide_hwif_t *hwif) 906{ 907 return probe_hwif_init_with_fixup(hwif, NULL); 908} 909 910EXPORT_SYMBOL(probe_hwif_init); 911 912#if MAX_HWIFS > 1 913/* 914 * save_match() is used to simplify logic in init_irq() below. 915 * 916 * A loophole here is that we may not know about a particular 917 * hwif's irq until after that hwif is actually probed/initialized.. 918 * This could be a problem for the case where an hwif is on a 919 * dual interface that requires serialization (eg. cmd640) and another 920 * hwif using one of the same irqs is initialized beforehand. 921 * 922 * This routine detects and reports such situations, but does not fix them. 923 */ 924static void save_match(ide_hwif_t *hwif, ide_hwif_t *new, ide_hwif_t **match) 925{ 926 ide_hwif_t *m = *match; 927 928 if (m && m->hwgroup && m->hwgroup != new->hwgroup) { 929 if (!new->hwgroup) 930 return; 931 printk("%s: potential irq problem with %s and %s\n", 932 hwif->name, new->name, m->name); 933 } 934 if (!m || m->irq != hwif->irq) /* don't undo a prior perfect match */ 935 *match = new; 936} 937#endif /* MAX_HWIFS > 1 */ 938 939/* 940 * init request queue 941 */ 942static int ide_init_queue(ide_drive_t *drive) 943{ 944 request_queue_t *q; 945 ide_hwif_t *hwif = HWIF(drive); 946 int max_sectors = 256; 947 int max_sg_entries = PRD_ENTRIES; 948 949 /* 950 * Our default set up assumes the normal IDE case, 951 * that is 64K segmenting, standard PRD setup 952 * and LBA28. Some drivers then impose their own 953 * limits and LBA48 we could raise it but as yet 954 * do not. 955 */ 956 957 q = blk_init_queue_node(do_ide_request, &ide_lock, hwif_to_node(hwif)); 958 if (!q) 959 return 1; 960 961 q->queuedata = drive; 962 blk_queue_segment_boundary(q, 0xffff); 963 964 if (!hwif->rqsize) { 965 if (hwif->no_lba48 || hwif->no_lba48_dma) 966 hwif->rqsize = 256; 967 else 968 hwif->rqsize = 65536; 969 } 970 if (hwif->rqsize < max_sectors) 971 max_sectors = hwif->rqsize; 972 blk_queue_max_sectors(q, max_sectors); 973 974#ifdef CONFIG_PCI 975 if (!PCI_DMA_BUS_IS_PHYS) 976 max_sg_entries >>= 1; 977#endif /* CONFIG_PCI */ 978 979 blk_queue_max_hw_segments(q, max_sg_entries); 980 blk_queue_max_phys_segments(q, max_sg_entries); 981 982 /* assign drive queue */ 983 drive->queue = q; 984 985 /* needs drive->queue to be set */ 986 ide_toggle_bounce(drive, 1); 987 988 return 0; 989} 990 991/* 992 * This routine sets up the irq for an ide interface, and creates a new 993 * hwgroup for the irq/hwif if none was previously assigned. 994 * 995 * Much of the code is for correctly detecting/handling irq sharing 996 * and irq serialization situations. This is somewhat complex because 997 * it handles static as well as dynamic (PCMCIA) IDE interfaces. 998 * 999 * The IRQF_DISABLED in sa_flags means ide_intr() is always entered with 1000 * interrupts completely disabled. This can be bad for interrupt latency, 1001 * but anything else has led to problems on some machines. We re-enable 1002 * interrupts as much as we can safely do in most places. 1003 */ 1004static int init_irq (ide_hwif_t *hwif) 1005{ 1006 unsigned int index; 1007 ide_hwgroup_t *hwgroup; 1008 ide_hwif_t *match = NULL; 1009 1010 1011 BUG_ON(in_interrupt()); 1012 BUG_ON(irqs_disabled()); 1013 BUG_ON(hwif == NULL); 1014 1015 down(&ide_cfg_sem); 1016 hwif->hwgroup = NULL; 1017#if MAX_HWIFS > 1 1018 /* 1019 * Group up with any other hwifs that share our irq(s). 1020 */ 1021 for (index = 0; index < MAX_HWIFS; index++) { 1022 ide_hwif_t *h = &ide_hwifs[index]; 1023 if (h->hwgroup) { /* scan only initialized hwif's */ 1024 if (hwif->irq == h->irq) { 1025 hwif->sharing_irq = h->sharing_irq = 1; 1026 if (hwif->chipset != ide_pci || 1027 h->chipset != ide_pci) { 1028 save_match(hwif, h, &match); 1029 } 1030 } 1031 if (hwif->serialized) { 1032 if (hwif->mate && hwif->mate->irq == h->irq) 1033 save_match(hwif, h, &match); 1034 } 1035 if (h->serialized) { 1036 if (h->mate && hwif->irq == h->mate->irq) 1037 save_match(hwif, h, &match); 1038 } 1039 } 1040 } 1041#endif /* MAX_HWIFS > 1 */ 1042 /* 1043 * If we are still without a hwgroup, then form a new one 1044 */ 1045 if (match) { 1046 hwgroup = match->hwgroup; 1047 hwif->hwgroup = hwgroup; 1048 /* 1049 * Link us into the hwgroup. 1050 * This must be done early, do ensure that unexpected_intr 1051 * can find the hwif and prevent irq storms. 1052 * No drives are attached to the new hwif, choose_drive 1053 * can't do anything stupid (yet). 1054 * Add ourself as the 2nd entry to the hwgroup->hwif 1055 * linked list, the first entry is the hwif that owns 1056 * hwgroup->handler - do not change that. 1057 */ 1058 spin_lock_irq(&ide_lock); 1059 hwif->next = hwgroup->hwif->next; 1060 hwgroup->hwif->next = hwif; 1061 spin_unlock_irq(&ide_lock); 1062 } else { 1063 hwgroup = kmalloc_node(sizeof(ide_hwgroup_t), GFP_KERNEL, 1064 hwif_to_node(hwif->drives[0].hwif)); 1065 if (!hwgroup) 1066 goto out_up; 1067 1068 hwif->hwgroup = hwgroup; 1069 1070 memset(hwgroup, 0, sizeof(ide_hwgroup_t)); 1071 hwgroup->hwif = hwif->next = hwif; 1072 hwgroup->rq = NULL; 1073 hwgroup->handler = NULL; 1074 hwgroup->drive = NULL; 1075 hwgroup->busy = 0; 1076 init_timer(&hwgroup->timer); 1077 hwgroup->timer.function = &ide_timer_expiry; 1078 hwgroup->timer.data = (unsigned long) hwgroup; 1079 } 1080 1081 /* 1082 * Allocate the irq, if not already obtained for another hwif 1083 */ 1084 if (!match || match->irq != hwif->irq) { 1085 int sa = IRQF_DISABLED; 1086#if defined(__mc68000__) || defined(CONFIG_APUS) 1087 sa = IRQF_SHARED; 1088#endif /* __mc68000__ || CONFIG_APUS */ 1089 1090 if (IDE_CHIPSET_IS_PCI(hwif->chipset)) { 1091 sa = IRQF_SHARED; 1092#ifndef CONFIG_IDEPCI_SHARE_IRQ 1093 sa |= IRQF_DISABLED; 1094#endif /* CONFIG_IDEPCI_SHARE_IRQ */ 1095 } 1096 1097 if (hwif->io_ports[IDE_CONTROL_OFFSET]) 1098 /* clear nIEN */ 1099 hwif->OUTB(0x08, hwif->io_ports[IDE_CONTROL_OFFSET]); 1100 1101 if (request_irq(hwif->irq,&ide_intr,sa,hwif->name,hwgroup)) 1102 goto out_unlink; 1103 } 1104 1105 /* 1106 * For any present drive: 1107 * - allocate the block device queue 1108 * - link drive into the hwgroup 1109 */ 1110 for (index = 0; index < MAX_DRIVES; ++index) { 1111 ide_drive_t *drive = &hwif->drives[index]; 1112 if (!drive->present) 1113 continue; 1114 if (ide_init_queue(drive)) { 1115 printk(KERN_ERR "ide: failed to init %s\n",drive->name); 1116 continue; 1117 } 1118 spin_lock_irq(&ide_lock); 1119 if (!hwgroup->drive) { 1120 /* first drive for hwgroup. */ 1121 drive->next = drive; 1122 hwgroup->drive = drive; 1123 hwgroup->hwif = HWIF(hwgroup->drive); 1124 } else { 1125 drive->next = hwgroup->drive->next; 1126 hwgroup->drive->next = drive; 1127 } 1128 spin_unlock_irq(&ide_lock); 1129 } 1130 1131#if !defined(__mc68000__) && !defined(CONFIG_APUS) 1132 printk("%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name, 1133 hwif->io_ports[IDE_DATA_OFFSET], 1134 hwif->io_ports[IDE_DATA_OFFSET]+7, 1135 hwif->io_ports[IDE_CONTROL_OFFSET], hwif->irq); 1136#else 1137 printk("%s at 0x%08lx on irq %d", hwif->name, 1138 hwif->io_ports[IDE_DATA_OFFSET], hwif->irq); 1139#endif /* __mc68000__ && CONFIG_APUS */ 1140 if (match) 1141 printk(" (%sed with %s)", 1142 hwif->sharing_irq ? "shar" : "serializ", match->name); 1143 printk("\n"); 1144 up(&ide_cfg_sem); 1145 return 0; 1146out_unlink: 1147 spin_lock_irq(&ide_lock); 1148 if (hwif->next == hwif) { 1149 BUG_ON(match); 1150 BUG_ON(hwgroup->hwif != hwif); 1151 kfree(hwgroup); 1152 } else { 1153 ide_hwif_t *g; 1154 g = hwgroup->hwif; 1155 while (g->next != hwif) 1156 g = g->next; 1157 g->next = hwif->next; 1158 if (hwgroup->hwif == hwif) { 1159 /* Impossible. */ 1160 printk(KERN_ERR "Duh. Uninitialized hwif listed as active hwif.\n"); 1161 hwgroup->hwif = g; 1162 } 1163 BUG_ON(hwgroup->hwif == hwif); 1164 } 1165 spin_unlock_irq(&ide_lock); 1166out_up: 1167 up(&ide_cfg_sem); 1168 return 1; 1169} 1170 1171static int ata_lock(dev_t dev, void *data) 1172{ 1173 return 0; 1174} 1175 1176static struct kobject *ata_probe(dev_t dev, int *part, void *data) 1177{ 1178 ide_hwif_t *hwif = data; 1179 int unit = *part >> PARTN_BITS; 1180 ide_drive_t *drive = &hwif->drives[unit]; 1181 if (!drive->present) 1182 return NULL; 1183 1184 if (drive->media == ide_disk) 1185 request_module("ide-disk"); 1186 if (drive->scsi) 1187 request_module("ide-scsi"); 1188 if (drive->media == ide_cdrom || drive->media == ide_optical) 1189 request_module("ide-cd"); 1190 if (drive->media == ide_tape) 1191 request_module("ide-tape"); 1192 if (drive->media == ide_floppy) 1193 request_module("ide-floppy"); 1194 1195 return NULL; 1196} 1197 1198static struct kobject *exact_match(dev_t dev, int *part, void *data) 1199{ 1200 struct gendisk *p = data; 1201 *part &= (1 << PARTN_BITS) - 1; 1202 return &p->kobj; 1203} 1204 1205static int exact_lock(dev_t dev, void *data) 1206{ 1207 struct gendisk *p = data; 1208 1209 if (!get_disk(p)) 1210 return -1; 1211 return 0; 1212} 1213 1214void ide_register_region(struct gendisk *disk) 1215{ 1216 blk_register_region(MKDEV(disk->major, disk->first_minor), 1217 disk->minors, NULL, exact_match, exact_lock, disk); 1218} 1219 1220EXPORT_SYMBOL_GPL(ide_register_region); 1221 1222void ide_unregister_region(struct gendisk *disk) 1223{ 1224 blk_unregister_region(MKDEV(disk->major, disk->first_minor), 1225 disk->minors); 1226} 1227 1228EXPORT_SYMBOL_GPL(ide_unregister_region); 1229 1230void ide_init_disk(struct gendisk *disk, ide_drive_t *drive) 1231{ 1232 ide_hwif_t *hwif = drive->hwif; 1233 unsigned int unit = (drive->select.all >> 4) & 1; 1234 1235 disk->major = hwif->major; 1236 disk->first_minor = unit << PARTN_BITS; 1237 sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit); 1238 disk->queue = drive->queue; 1239} 1240 1241EXPORT_SYMBOL_GPL(ide_init_disk); 1242 1243static void ide_remove_drive_from_hwgroup(ide_drive_t *drive) 1244{ 1245 ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; 1246 1247 if (drive == drive->next) { 1248 /* special case: last drive from hwgroup. */ 1249 BUG_ON(hwgroup->drive != drive); 1250 hwgroup->drive = NULL; 1251 } else { 1252 ide_drive_t *walk; 1253 1254 walk = hwgroup->drive; 1255 while (walk->next != drive) 1256 walk = walk->next; 1257 walk->next = drive->next; 1258 if (hwgroup->drive == drive) { 1259 hwgroup->drive = drive->next; 1260 hwgroup->hwif = hwgroup->drive->hwif; 1261 } 1262 } 1263 BUG_ON(hwgroup->drive == drive); 1264} 1265 1266static void drive_release_dev (struct device *dev) 1267{ 1268 ide_drive_t *drive = container_of(dev, ide_drive_t, gendev); 1269 1270 spin_lock_irq(&ide_lock); 1271 ide_remove_drive_from_hwgroup(drive); 1272 kfree(drive->id); 1273 drive->id = NULL; 1274 drive->present = 0; 1275 /* Messed up locking ... */ 1276 spin_unlock_irq(&ide_lock); 1277 blk_cleanup_queue(drive->queue); 1278 spin_lock_irq(&ide_lock); 1279 drive->queue = NULL; 1280 spin_unlock_irq(&ide_lock); 1281 1282 complete(&drive->gendev_rel_comp); 1283} 1284 1285/* 1286 * init_gendisk() (as opposed to ide_geninit) is called for each major device, 1287 * after probing for drives, to allocate partition tables and other data 1288 * structures needed for the routines in genhd.c. ide_geninit() gets called 1289 * somewhat later, during the partition check. 1290 */ 1291static void init_gendisk (ide_hwif_t *hwif) 1292{ 1293 unsigned int unit; 1294 1295 for (unit = 0; unit < MAX_DRIVES; ++unit) { 1296 ide_drive_t * drive = &hwif->drives[unit]; 1297 ide_add_generic_settings(drive); 1298 snprintf(drive->gendev.bus_id,BUS_ID_SIZE,"%u.%u", 1299 hwif->index,unit); 1300 drive->gendev.parent = &hwif->gendev; 1301 drive->gendev.bus = &ide_bus_type; 1302 drive->gendev.driver_data = drive; 1303 drive->gendev.release = drive_release_dev; 1304 } 1305 blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS, 1306 THIS_MODULE, ata_probe, ata_lock, hwif); 1307} 1308 1309static int hwif_init(ide_hwif_t *hwif) 1310{ 1311 int old_irq; 1312 1313 /* Return success if no device is connected */ 1314 if (!hwif->present) 1315 return 1; 1316 1317 if (!hwif->irq) { 1318 if (!(hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET]))) 1319 { 1320 printk("%s: DISABLED, NO IRQ\n", hwif->name); 1321 return (hwif->present = 0); 1322 } 1323 } 1324#ifdef CONFIG_BLK_DEV_HD 1325 if (hwif->irq == HD_IRQ && hwif->io_ports[IDE_DATA_OFFSET] != HD_DATA) { 1326 printk("%s: CANNOT SHARE IRQ WITH OLD " 1327 "HARDDISK DRIVER (hd.c)\n", hwif->name); 1328 return (hwif->present = 0); 1329 } 1330#endif /* CONFIG_BLK_DEV_HD */ 1331 1332 /* we set it back to 1 if all is ok below */ 1333 hwif->present = 0; 1334 1335 if (register_blkdev(hwif->major, hwif->name)) 1336 return 0; 1337 1338 if (!hwif->sg_max_nents) 1339 hwif->sg_max_nents = PRD_ENTRIES; 1340 1341 hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents, 1342 GFP_KERNEL); 1343 if (!hwif->sg_table) { 1344 printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name); 1345 goto out; 1346 } 1347 1348 if (init_irq(hwif) == 0) 1349 goto done; 1350 1351 old_irq = hwif->irq; 1352 /* 1353 * It failed to initialise. Find the default IRQ for 1354 * this port and try that. 1355 */ 1356 if (!(hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET]))) { 1357 printk("%s: Disabled unable to get IRQ %d.\n", 1358 hwif->name, old_irq); 1359 goto out; 1360 } 1361 if (init_irq(hwif)) { 1362 printk("%s: probed IRQ %d and default IRQ %d failed.\n", 1363 hwif->name, old_irq, hwif->irq); 1364 goto out; 1365 } 1366 printk("%s: probed IRQ %d failed, using default.\n", 1367 hwif->name, hwif->irq); 1368 1369done: 1370 init_gendisk(hwif); 1371 1372 ide_acpi_init(hwif); 1373 1374 hwif->present = 1; /* success */ 1375 return 1; 1376 1377out: 1378 unregister_blkdev(hwif->major, hwif->name); 1379 return 0; 1380} 1381 1382int ideprobe_init (void) 1383{ 1384 unsigned int index; 1385 int probe[MAX_HWIFS]; 1386 1387 memset(probe, 0, MAX_HWIFS * sizeof(int)); 1388 for (index = 0; index < MAX_HWIFS; ++index) 1389 probe[index] = !ide_hwifs[index].present; 1390 1391 for (index = 0; index < MAX_HWIFS; ++index) 1392 if (probe[index]) 1393 probe_hwif(&ide_hwifs[index], NULL); 1394 for (index = 0; index < MAX_HWIFS; ++index) 1395 if (probe[index]) 1396 hwif_init(&ide_hwifs[index]); 1397 for (index = 0; index < MAX_HWIFS; ++index) { 1398 if (probe[index]) { 1399 ide_hwif_t *hwif = &ide_hwifs[index]; 1400 int unit; 1401 if (!hwif->present) 1402 continue; 1403 if (hwif->chipset == ide_unknown || hwif->chipset == ide_forced) 1404 hwif->chipset = ide_generic; 1405 for (unit = 0; unit < MAX_DRIVES; ++unit) 1406 if (hwif->drives[unit].present) { 1407 int ret = device_register( 1408 &hwif->drives[unit].gendev); 1409 if (ret < 0) 1410 printk(KERN_WARNING "IDE: %s: " 1411 "device_register error: %d\n", 1412 __FUNCTION__, ret); 1413 } 1414 } 1415 } 1416 for (index = 0; index < MAX_HWIFS; ++index) 1417 if (probe[index]) 1418 ide_proc_register_port(&ide_hwifs[index]); 1419 return 0; 1420} 1421 1422EXPORT_SYMBOL_GPL(ideprobe_init); 1423