ide-probe.c revision dc81785dd620c770cf929ff25bb4720e91c23f7a
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#include <linux/scatterlist.h> 51 52#include <asm/byteorder.h> 53#include <asm/irq.h> 54#include <asm/uaccess.h> 55#include <asm/io.h> 56 57/** 58 * generic_id - add a generic drive id 59 * @drive: drive to make an ID block for 60 * 61 * Add a fake id field to the drive we are passed. This allows 62 * use to skip a ton of NULL checks (which people always miss) 63 * and make drive properties unconditional outside of this file 64 */ 65 66static void generic_id(ide_drive_t *drive) 67{ 68 drive->id->cyls = drive->cyl; 69 drive->id->heads = drive->head; 70 drive->id->sectors = drive->sect; 71 drive->id->cur_cyls = drive->cyl; 72 drive->id->cur_heads = drive->head; 73 drive->id->cur_sectors = drive->sect; 74} 75 76static void ide_disk_init_chs(ide_drive_t *drive) 77{ 78 struct hd_driveid *id = drive->id; 79 80 /* Extract geometry if we did not already have one for the drive */ 81 if (!drive->cyl || !drive->head || !drive->sect) { 82 drive->cyl = drive->bios_cyl = id->cyls; 83 drive->head = drive->bios_head = id->heads; 84 drive->sect = drive->bios_sect = id->sectors; 85 } 86 87 /* Handle logical geometry translation by the drive */ 88 if ((id->field_valid & 1) && id->cur_cyls && 89 id->cur_heads && (id->cur_heads <= 16) && id->cur_sectors) { 90 drive->cyl = id->cur_cyls; 91 drive->head = id->cur_heads; 92 drive->sect = id->cur_sectors; 93 } 94 95 /* Use physical geometry if what we have still makes no sense */ 96 if (drive->head > 16 && id->heads && id->heads <= 16) { 97 drive->cyl = id->cyls; 98 drive->head = id->heads; 99 drive->sect = id->sectors; 100 } 101} 102 103static void ide_disk_init_mult_count(ide_drive_t *drive) 104{ 105 struct hd_driveid *id = drive->id; 106 107 drive->mult_count = 0; 108 if (id->max_multsect) { 109#ifdef CONFIG_IDEDISK_MULTI_MODE 110 id->multsect = ((id->max_multsect/2) > 1) ? id->max_multsect : 0; 111 id->multsect_valid = id->multsect ? 1 : 0; 112 drive->mult_req = id->multsect_valid ? id->max_multsect : INITIAL_MULT_COUNT; 113 drive->special.b.set_multmode = drive->mult_req ? 1 : 0; 114#else /* original, pre IDE-NFG, per request of AC */ 115 drive->mult_req = INITIAL_MULT_COUNT; 116 if (drive->mult_req > id->max_multsect) 117 drive->mult_req = id->max_multsect; 118 if (drive->mult_req || ((id->multsect_valid & 1) && id->multsect)) 119 drive->special.b.set_multmode = 1; 120#endif 121 } 122} 123 124/** 125 * do_identify - identify a drive 126 * @drive: drive to identify 127 * @cmd: command used 128 * 129 * Called when we have issued a drive identify command to 130 * read and parse the results. This function is run with 131 * interrupts disabled. 132 */ 133 134static inline void do_identify (ide_drive_t *drive, u8 cmd) 135{ 136 ide_hwif_t *hwif = HWIF(drive); 137 int bswap = 1; 138 struct hd_driveid *id; 139 140 id = drive->id; 141 /* read 512 bytes of id info */ 142 hwif->ata_input_data(drive, id, SECTOR_WORDS); 143 144 drive->id_read = 1; 145 local_irq_enable(); 146 ide_fix_driveid(id); 147 148#if defined (CONFIG_SCSI_EATA_PIO) || 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 || 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) 722{ 723 unsigned long flags; 724 unsigned int irqd; 725 int unit; 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 * Need to probe slave device first to make it release PDIAG-. 782 */ 783 for (unit = MAX_DRIVES - 1; unit >= 0; unit--) { 784 ide_drive_t *drive = &hwif->drives[unit]; 785 drive->dn = (hwif->channel ? 2 : 0) + unit; 786 (void) probe_for_drive(drive); 787 if (drive->present && !hwif->present) { 788 hwif->present = 1; 789 if (hwif->chipset != ide_4drives || 790 !hwif->mate || 791 !hwif->mate->present) { 792 hwif_register(hwif); 793 } 794 } 795 } 796 if (hwif->io_ports[IDE_CONTROL_OFFSET] && hwif->reset) { 797 unsigned long timeout = jiffies + WAIT_WORSTCASE; 798 u8 stat; 799 800 printk(KERN_WARNING "%s: reset\n", hwif->name); 801 hwif->OUTB(12, hwif->io_ports[IDE_CONTROL_OFFSET]); 802 udelay(10); 803 hwif->OUTB(8, hwif->io_ports[IDE_CONTROL_OFFSET]); 804 do { 805 msleep(50); 806 stat = hwif->INB(hwif->io_ports[IDE_STATUS_OFFSET]); 807 } while ((stat & BUSY_STAT) && time_after(timeout, jiffies)); 808 809 } 810 local_irq_restore(flags); 811 /* 812 * Use cached IRQ number. It might be (and is...) changed by probe 813 * code above 814 */ 815 if (irqd) 816 enable_irq(irqd); 817 818 if (!hwif->present) { 819 ide_hwif_release_regions(hwif); 820 return; 821 } 822 823 if (hwif->fixup) 824 hwif->fixup(hwif); 825 826 for (unit = 0; unit < MAX_DRIVES; ++unit) { 827 ide_drive_t *drive = &hwif->drives[unit]; 828 829 if (drive->present) { 830 if (drive->autotune == IDE_TUNE_AUTO) 831 ide_set_max_pio(drive); 832 833 if (drive->autotune != IDE_TUNE_DEFAULT && 834 drive->autotune != IDE_TUNE_AUTO) 835 continue; 836 837 drive->nice1 = 1; 838 839 if (hwif->ide_dma_on) { 840 /* 841 * Force DMAing for the beginning of the check. 842 * Some chipsets appear to do interesting 843 * things, if not checked and cleared. 844 * PARANOIA!!! 845 */ 846 hwif->dma_off_quietly(drive); 847 ide_set_dma(drive); 848 } 849 } 850 } 851 852 for (unit = 0; unit < MAX_DRIVES; ++unit) { 853 ide_drive_t *drive = &hwif->drives[unit]; 854 855 if (hwif->no_io_32bit) 856 drive->no_io_32bit = 1; 857 else 858 drive->no_io_32bit = drive->id->dword_io ? 1 : 0; 859 } 860} 861 862static int hwif_init(ide_hwif_t *hwif); 863static void hwif_register_devices(ide_hwif_t *hwif); 864 865static int probe_hwif_init(ide_hwif_t *hwif) 866{ 867 probe_hwif(hwif); 868 869 if (!hwif_init(hwif)) { 870 printk(KERN_INFO "%s: failed to initialize IDE interface\n", 871 hwif->name); 872 return -1; 873 } 874 875 if (hwif->present) 876 hwif_register_devices(hwif); 877 878 return 0; 879} 880 881#if MAX_HWIFS > 1 882/* 883 * save_match() is used to simplify logic in init_irq() below. 884 * 885 * A loophole here is that we may not know about a particular 886 * hwif's irq until after that hwif is actually probed/initialized.. 887 * This could be a problem for the case where an hwif is on a 888 * dual interface that requires serialization (eg. cmd640) and another 889 * hwif using one of the same irqs is initialized beforehand. 890 * 891 * This routine detects and reports such situations, but does not fix them. 892 */ 893static void save_match(ide_hwif_t *hwif, ide_hwif_t *new, ide_hwif_t **match) 894{ 895 ide_hwif_t *m = *match; 896 897 if (m && m->hwgroup && m->hwgroup != new->hwgroup) { 898 if (!new->hwgroup) 899 return; 900 printk("%s: potential irq problem with %s and %s\n", 901 hwif->name, new->name, m->name); 902 } 903 if (!m || m->irq != hwif->irq) /* don't undo a prior perfect match */ 904 *match = new; 905} 906#endif /* MAX_HWIFS > 1 */ 907 908/* 909 * init request queue 910 */ 911static int ide_init_queue(ide_drive_t *drive) 912{ 913 struct request_queue *q; 914 ide_hwif_t *hwif = HWIF(drive); 915 int max_sectors = 256; 916 int max_sg_entries = PRD_ENTRIES; 917 918 /* 919 * Our default set up assumes the normal IDE case, 920 * that is 64K segmenting, standard PRD setup 921 * and LBA28. Some drivers then impose their own 922 * limits and LBA48 we could raise it but as yet 923 * do not. 924 */ 925 926 q = blk_init_queue_node(do_ide_request, &ide_lock, hwif_to_node(hwif)); 927 if (!q) 928 return 1; 929 930 q->queuedata = drive; 931 blk_queue_segment_boundary(q, 0xffff); 932 933 if (!hwif->rqsize) { 934 if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) || 935 (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA)) 936 hwif->rqsize = 256; 937 else 938 hwif->rqsize = 65536; 939 } 940 if (hwif->rqsize < max_sectors) 941 max_sectors = hwif->rqsize; 942 blk_queue_max_sectors(q, max_sectors); 943 944#ifdef CONFIG_PCI 945 /* When we have an IOMMU, we may have a problem where pci_map_sg() 946 * creates segments that don't completely match our boundary 947 * requirements and thus need to be broken up again. Because it 948 * doesn't align properly either, we may actually have to break up 949 * to more segments than what was we got in the first place, a max 950 * worst case is twice as many. 951 * This will be fixed once we teach pci_map_sg() about our boundary 952 * requirements, hopefully soon. *FIXME* 953 */ 954 if (!PCI_DMA_BUS_IS_PHYS) 955 max_sg_entries >>= 1; 956#endif /* CONFIG_PCI */ 957 958 blk_queue_max_hw_segments(q, max_sg_entries); 959 blk_queue_max_phys_segments(q, max_sg_entries); 960 961 /* assign drive queue */ 962 drive->queue = q; 963 964 /* needs drive->queue to be set */ 965 ide_toggle_bounce(drive, 1); 966 967 return 0; 968} 969 970/* 971 * This routine sets up the irq for an ide interface, and creates a new 972 * hwgroup for the irq/hwif if none was previously assigned. 973 * 974 * Much of the code is for correctly detecting/handling irq sharing 975 * and irq serialization situations. This is somewhat complex because 976 * it handles static as well as dynamic (PCMCIA) IDE interfaces. 977 * 978 * The IRQF_DISABLED in sa_flags means ide_intr() is always entered with 979 * interrupts completely disabled. This can be bad for interrupt latency, 980 * but anything else has led to problems on some machines. We re-enable 981 * interrupts as much as we can safely do in most places. 982 */ 983static int init_irq (ide_hwif_t *hwif) 984{ 985 unsigned int index; 986 ide_hwgroup_t *hwgroup; 987 ide_hwif_t *match = NULL; 988 989 990 BUG_ON(in_interrupt()); 991 BUG_ON(irqs_disabled()); 992 BUG_ON(hwif == NULL); 993 994 mutex_lock(&ide_cfg_mtx); 995 hwif->hwgroup = NULL; 996#if MAX_HWIFS > 1 997 /* 998 * Group up with any other hwifs that share our irq(s). 999 */ 1000 for (index = 0; index < MAX_HWIFS; index++) { 1001 ide_hwif_t *h = &ide_hwifs[index]; 1002 if (h->hwgroup) { /* scan only initialized hwif's */ 1003 if (hwif->irq == h->irq) { 1004 hwif->sharing_irq = h->sharing_irq = 1; 1005 if (hwif->chipset != ide_pci || 1006 h->chipset != ide_pci) { 1007 save_match(hwif, h, &match); 1008 } 1009 } 1010 if (hwif->serialized) { 1011 if (hwif->mate && hwif->mate->irq == h->irq) 1012 save_match(hwif, h, &match); 1013 } 1014 if (h->serialized) { 1015 if (h->mate && hwif->irq == h->mate->irq) 1016 save_match(hwif, h, &match); 1017 } 1018 } 1019 } 1020#endif /* MAX_HWIFS > 1 */ 1021 /* 1022 * If we are still without a hwgroup, then form a new one 1023 */ 1024 if (match) { 1025 hwgroup = match->hwgroup; 1026 hwif->hwgroup = hwgroup; 1027 /* 1028 * Link us into the hwgroup. 1029 * This must be done early, do ensure that unexpected_intr 1030 * can find the hwif and prevent irq storms. 1031 * No drives are attached to the new hwif, choose_drive 1032 * can't do anything stupid (yet). 1033 * Add ourself as the 2nd entry to the hwgroup->hwif 1034 * linked list, the first entry is the hwif that owns 1035 * hwgroup->handler - do not change that. 1036 */ 1037 spin_lock_irq(&ide_lock); 1038 hwif->next = hwgroup->hwif->next; 1039 hwgroup->hwif->next = hwif; 1040 spin_unlock_irq(&ide_lock); 1041 } else { 1042 hwgroup = kmalloc_node(sizeof(ide_hwgroup_t), 1043 GFP_KERNEL | __GFP_ZERO, 1044 hwif_to_node(hwif->drives[0].hwif)); 1045 if (!hwgroup) 1046 goto out_up; 1047 1048 hwif->hwgroup = hwgroup; 1049 1050 hwgroup->hwif = hwif->next = hwif; 1051 hwgroup->rq = NULL; 1052 hwgroup->handler = NULL; 1053 hwgroup->drive = NULL; 1054 hwgroup->busy = 0; 1055 init_timer(&hwgroup->timer); 1056 hwgroup->timer.function = &ide_timer_expiry; 1057 hwgroup->timer.data = (unsigned long) hwgroup; 1058 } 1059 1060 /* 1061 * Allocate the irq, if not already obtained for another hwif 1062 */ 1063 if (!match || match->irq != hwif->irq) { 1064 int sa = IRQF_DISABLED; 1065#if defined(__mc68000__) || defined(CONFIG_APUS) 1066 sa = IRQF_SHARED; 1067#endif /* __mc68000__ || CONFIG_APUS */ 1068 1069 if (IDE_CHIPSET_IS_PCI(hwif->chipset)) { 1070 sa = IRQF_SHARED; 1071#ifndef CONFIG_IDEPCI_SHARE_IRQ 1072 sa |= IRQF_DISABLED; 1073#endif /* CONFIG_IDEPCI_SHARE_IRQ */ 1074 } 1075 1076 if (hwif->io_ports[IDE_CONTROL_OFFSET]) 1077 /* clear nIEN */ 1078 hwif->OUTB(0x08, hwif->io_ports[IDE_CONTROL_OFFSET]); 1079 1080 if (request_irq(hwif->irq,&ide_intr,sa,hwif->name,hwgroup)) 1081 goto out_unlink; 1082 } 1083 1084 /* 1085 * For any present drive: 1086 * - allocate the block device queue 1087 * - link drive into the hwgroup 1088 */ 1089 for (index = 0; index < MAX_DRIVES; ++index) { 1090 ide_drive_t *drive = &hwif->drives[index]; 1091 if (!drive->present) 1092 continue; 1093 if (ide_init_queue(drive)) { 1094 printk(KERN_ERR "ide: failed to init %s\n",drive->name); 1095 continue; 1096 } 1097 spin_lock_irq(&ide_lock); 1098 if (!hwgroup->drive) { 1099 /* first drive for hwgroup. */ 1100 drive->next = drive; 1101 hwgroup->drive = drive; 1102 hwgroup->hwif = HWIF(hwgroup->drive); 1103 } else { 1104 drive->next = hwgroup->drive->next; 1105 hwgroup->drive->next = drive; 1106 } 1107 spin_unlock_irq(&ide_lock); 1108 } 1109 1110#if !defined(__mc68000__) && !defined(CONFIG_APUS) 1111 printk("%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name, 1112 hwif->io_ports[IDE_DATA_OFFSET], 1113 hwif->io_ports[IDE_DATA_OFFSET]+7, 1114 hwif->io_ports[IDE_CONTROL_OFFSET], hwif->irq); 1115#else 1116 printk("%s at 0x%08lx on irq %d", hwif->name, 1117 hwif->io_ports[IDE_DATA_OFFSET], hwif->irq); 1118#endif /* __mc68000__ && CONFIG_APUS */ 1119 if (match) 1120 printk(" (%sed with %s)", 1121 hwif->sharing_irq ? "shar" : "serializ", match->name); 1122 printk("\n"); 1123 mutex_unlock(&ide_cfg_mtx); 1124 return 0; 1125out_unlink: 1126 spin_lock_irq(&ide_lock); 1127 if (hwif->next == hwif) { 1128 BUG_ON(match); 1129 BUG_ON(hwgroup->hwif != hwif); 1130 kfree(hwgroup); 1131 } else { 1132 ide_hwif_t *g; 1133 g = hwgroup->hwif; 1134 while (g->next != hwif) 1135 g = g->next; 1136 g->next = hwif->next; 1137 if (hwgroup->hwif == hwif) { 1138 /* Impossible. */ 1139 printk(KERN_ERR "Duh. Uninitialized hwif listed as active hwif.\n"); 1140 hwgroup->hwif = g; 1141 } 1142 BUG_ON(hwgroup->hwif == hwif); 1143 } 1144 spin_unlock_irq(&ide_lock); 1145out_up: 1146 mutex_unlock(&ide_cfg_mtx); 1147 return 1; 1148} 1149 1150static int ata_lock(dev_t dev, void *data) 1151{ 1152 /* FIXME: we want to pin hwif down */ 1153 return 0; 1154} 1155 1156static struct kobject *ata_probe(dev_t dev, int *part, void *data) 1157{ 1158 ide_hwif_t *hwif = data; 1159 int unit = *part >> PARTN_BITS; 1160 ide_drive_t *drive = &hwif->drives[unit]; 1161 if (!drive->present) 1162 return NULL; 1163 1164 if (drive->media == ide_disk) 1165 request_module("ide-disk"); 1166 if (drive->scsi) 1167 request_module("ide-scsi"); 1168 if (drive->media == ide_cdrom || drive->media == ide_optical) 1169 request_module("ide-cd"); 1170 if (drive->media == ide_tape) 1171 request_module("ide-tape"); 1172 if (drive->media == ide_floppy) 1173 request_module("ide-floppy"); 1174 1175 return NULL; 1176} 1177 1178static struct kobject *exact_match(dev_t dev, int *part, void *data) 1179{ 1180 struct gendisk *p = data; 1181 *part &= (1 << PARTN_BITS) - 1; 1182 return &p->kobj; 1183} 1184 1185static int exact_lock(dev_t dev, void *data) 1186{ 1187 struct gendisk *p = data; 1188 1189 if (!get_disk(p)) 1190 return -1; 1191 return 0; 1192} 1193 1194void ide_register_region(struct gendisk *disk) 1195{ 1196 blk_register_region(MKDEV(disk->major, disk->first_minor), 1197 disk->minors, NULL, exact_match, exact_lock, disk); 1198} 1199 1200EXPORT_SYMBOL_GPL(ide_register_region); 1201 1202void ide_unregister_region(struct gendisk *disk) 1203{ 1204 blk_unregister_region(MKDEV(disk->major, disk->first_minor), 1205 disk->minors); 1206} 1207 1208EXPORT_SYMBOL_GPL(ide_unregister_region); 1209 1210void ide_init_disk(struct gendisk *disk, ide_drive_t *drive) 1211{ 1212 ide_hwif_t *hwif = drive->hwif; 1213 unsigned int unit = (drive->select.all >> 4) & 1; 1214 1215 disk->major = hwif->major; 1216 disk->first_minor = unit << PARTN_BITS; 1217 sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit); 1218 disk->queue = drive->queue; 1219} 1220 1221EXPORT_SYMBOL_GPL(ide_init_disk); 1222 1223static void ide_remove_drive_from_hwgroup(ide_drive_t *drive) 1224{ 1225 ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; 1226 1227 if (drive == drive->next) { 1228 /* special case: last drive from hwgroup. */ 1229 BUG_ON(hwgroup->drive != drive); 1230 hwgroup->drive = NULL; 1231 } else { 1232 ide_drive_t *walk; 1233 1234 walk = hwgroup->drive; 1235 while (walk->next != drive) 1236 walk = walk->next; 1237 walk->next = drive->next; 1238 if (hwgroup->drive == drive) { 1239 hwgroup->drive = drive->next; 1240 hwgroup->hwif = hwgroup->drive->hwif; 1241 } 1242 } 1243 BUG_ON(hwgroup->drive == drive); 1244} 1245 1246static void drive_release_dev (struct device *dev) 1247{ 1248 ide_drive_t *drive = container_of(dev, ide_drive_t, gendev); 1249 1250 spin_lock_irq(&ide_lock); 1251 ide_remove_drive_from_hwgroup(drive); 1252 kfree(drive->id); 1253 drive->id = NULL; 1254 drive->present = 0; 1255 /* Messed up locking ... */ 1256 spin_unlock_irq(&ide_lock); 1257 blk_cleanup_queue(drive->queue); 1258 spin_lock_irq(&ide_lock); 1259 drive->queue = NULL; 1260 spin_unlock_irq(&ide_lock); 1261 1262 complete(&drive->gendev_rel_comp); 1263} 1264 1265/* 1266 * init_gendisk() (as opposed to ide_geninit) is called for each major device, 1267 * after probing for drives, to allocate partition tables and other data 1268 * structures needed for the routines in genhd.c. ide_geninit() gets called 1269 * somewhat later, during the partition check. 1270 */ 1271static void init_gendisk (ide_hwif_t *hwif) 1272{ 1273 unsigned int unit; 1274 1275 for (unit = 0; unit < MAX_DRIVES; ++unit) { 1276 ide_drive_t * drive = &hwif->drives[unit]; 1277 ide_add_generic_settings(drive); 1278 snprintf(drive->gendev.bus_id,BUS_ID_SIZE,"%u.%u", 1279 hwif->index,unit); 1280 drive->gendev.parent = &hwif->gendev; 1281 drive->gendev.bus = &ide_bus_type; 1282 drive->gendev.driver_data = drive; 1283 drive->gendev.release = drive_release_dev; 1284 } 1285 blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS, 1286 THIS_MODULE, ata_probe, ata_lock, hwif); 1287} 1288 1289static int hwif_init(ide_hwif_t *hwif) 1290{ 1291 int old_irq; 1292 1293 /* Return success if no device is connected */ 1294 if (!hwif->present) 1295 return 1; 1296 1297 if (!hwif->irq) { 1298 if (!(hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET]))) 1299 { 1300 printk("%s: DISABLED, NO IRQ\n", hwif->name); 1301 return (hwif->present = 0); 1302 } 1303 } 1304#ifdef CONFIG_BLK_DEV_HD 1305 if (hwif->irq == HD_IRQ && hwif->io_ports[IDE_DATA_OFFSET] != HD_DATA) { 1306 printk("%s: CANNOT SHARE IRQ WITH OLD " 1307 "HARDDISK DRIVER (hd.c)\n", hwif->name); 1308 return (hwif->present = 0); 1309 } 1310#endif /* CONFIG_BLK_DEV_HD */ 1311 1312 /* we set it back to 1 if all is ok below */ 1313 hwif->present = 0; 1314 1315 if (register_blkdev(hwif->major, hwif->name)) 1316 return 0; 1317 1318 if (!hwif->sg_max_nents) 1319 hwif->sg_max_nents = PRD_ENTRIES; 1320 1321 hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents, 1322 GFP_KERNEL); 1323 if (!hwif->sg_table) { 1324 printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name); 1325 goto out; 1326 } 1327 1328 sg_init_table(hwif->sg_table, hwif->sg_max_nents); 1329 1330 if (init_irq(hwif) == 0) 1331 goto done; 1332 1333 old_irq = hwif->irq; 1334 /* 1335 * It failed to initialise. Find the default IRQ for 1336 * this port and try that. 1337 */ 1338 if (!(hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET]))) { 1339 printk("%s: Disabled unable to get IRQ %d.\n", 1340 hwif->name, old_irq); 1341 goto out; 1342 } 1343 if (init_irq(hwif)) { 1344 printk("%s: probed IRQ %d and default IRQ %d failed.\n", 1345 hwif->name, old_irq, hwif->irq); 1346 goto out; 1347 } 1348 printk("%s: probed IRQ %d failed, using default.\n", 1349 hwif->name, hwif->irq); 1350 1351done: 1352 init_gendisk(hwif); 1353 1354 ide_acpi_init(hwif); 1355 1356 hwif->present = 1; /* success */ 1357 return 1; 1358 1359out: 1360 unregister_blkdev(hwif->major, hwif->name); 1361 return 0; 1362} 1363 1364static void hwif_register_devices(ide_hwif_t *hwif) 1365{ 1366 unsigned int i; 1367 1368 for (i = 0; i < MAX_DRIVES; i++) { 1369 ide_drive_t *drive = &hwif->drives[i]; 1370 1371 if (drive->present) { 1372 int ret = device_register(&drive->gendev); 1373 1374 if (ret < 0) 1375 printk(KERN_WARNING "IDE: %s: " 1376 "device_register error: %d\n", 1377 __FUNCTION__, ret); 1378 } 1379 } 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]); 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 if (!hwif->present) 1401 continue; 1402 if (hwif->chipset == ide_unknown || hwif->chipset == ide_forced) 1403 hwif->chipset = ide_generic; 1404 hwif_register_devices(hwif); 1405 } 1406 } 1407 for (index = 0; index < MAX_HWIFS; ++index) 1408 if (probe[index]) 1409 ide_proc_register_port(&ide_hwifs[index]); 1410 return 0; 1411} 1412 1413EXPORT_SYMBOL_GPL(ideprobe_init); 1414 1415int ide_device_add(u8 idx[4]) 1416{ 1417 int i, rc = 0; 1418 1419 for (i = 0; i < 4; i++) { 1420 if (idx[i] != 0xff) 1421 rc |= probe_hwif_init(&ide_hwifs[idx[i]]); 1422 } 1423 1424 for (i = 0; i < 4; i++) { 1425 if (idx[i] != 0xff) 1426 ide_proc_register_port(&ide_hwifs[idx[i]]); 1427 } 1428 1429 return rc; 1430} 1431 1432EXPORT_SYMBOL_GPL(ide_device_add); 1433