ide-probe.c revision 6044ec8882c726e325017bd948aa0cd94ad33abc
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#undef REALLY_SLOW_IO /* most systems can safely undef this */ 35 36#include <linux/config.h> 37#include <linux/module.h> 38#include <linux/types.h> 39#include <linux/string.h> 40#include <linux/kernel.h> 41#include <linux/timer.h> 42#include <linux/mm.h> 43#include <linux/interrupt.h> 44#include <linux/major.h> 45#include <linux/errno.h> 46#include <linux/genhd.h> 47#include <linux/slab.h> 48#include <linux/delay.h> 49#include <linux/ide.h> 50#include <linux/devfs_fs_kernel.h> 51#include <linux/spinlock.h> 52#include <linux/kmod.h> 53#include <linux/pci.h> 54 55#include <asm/byteorder.h> 56#include <asm/irq.h> 57#include <asm/uaccess.h> 58#include <asm/io.h> 59 60/** 61 * generic_id - add a generic drive id 62 * @drive: drive to make an ID block for 63 * 64 * Add a fake id field to the drive we are passed. This allows 65 * use to skip a ton of NULL checks (which people always miss) 66 * and make drive properties unconditional outside of this file 67 */ 68 69static void generic_id(ide_drive_t *drive) 70{ 71 drive->id->cyls = drive->cyl; 72 drive->id->heads = drive->head; 73 drive->id->sectors = drive->sect; 74 drive->id->cur_cyls = drive->cyl; 75 drive->id->cur_heads = drive->head; 76 drive->id->cur_sectors = drive->sect; 77} 78 79static void ide_disk_init_chs(ide_drive_t *drive) 80{ 81 struct hd_driveid *id = drive->id; 82 83 /* Extract geometry if we did not already have one for the drive */ 84 if (!drive->cyl || !drive->head || !drive->sect) { 85 drive->cyl = drive->bios_cyl = id->cyls; 86 drive->head = drive->bios_head = id->heads; 87 drive->sect = drive->bios_sect = id->sectors; 88 } 89 90 /* Handle logical geometry translation by the drive */ 91 if ((id->field_valid & 1) && id->cur_cyls && 92 id->cur_heads && (id->cur_heads <= 16) && id->cur_sectors) { 93 drive->cyl = id->cur_cyls; 94 drive->head = id->cur_heads; 95 drive->sect = id->cur_sectors; 96 } 97 98 /* Use physical geometry if what we have still makes no sense */ 99 if (drive->head > 16 && id->heads && id->heads <= 16) { 100 drive->cyl = id->cyls; 101 drive->head = id->heads; 102 drive->sect = id->sectors; 103 } 104} 105 106static void ide_disk_init_mult_count(ide_drive_t *drive) 107{ 108 struct hd_driveid *id = drive->id; 109 110 drive->mult_count = 0; 111 if (id->max_multsect) { 112#ifdef CONFIG_IDEDISK_MULTI_MODE 113 id->multsect = ((id->max_multsect/2) > 1) ? id->max_multsect : 0; 114 id->multsect_valid = id->multsect ? 1 : 0; 115 drive->mult_req = id->multsect_valid ? id->max_multsect : INITIAL_MULT_COUNT; 116 drive->special.b.set_multmode = drive->mult_req ? 1 : 0; 117#else /* original, pre IDE-NFG, per request of AC */ 118 drive->mult_req = INITIAL_MULT_COUNT; 119 if (drive->mult_req > id->max_multsect) 120 drive->mult_req = id->max_multsect; 121 if (drive->mult_req || ((id->multsect_valid & 1) && id->multsect)) 122 drive->special.b.set_multmode = 1; 123#endif 124 } 125} 126 127/** 128 * drive_is_flashcard - check for compact flash 129 * @drive: drive to check 130 * 131 * CompactFlash cards and their brethern pretend to be removable 132 * hard disks, except: 133 * (1) they never have a slave unit, and 134 * (2) they don't have doorlock mechanisms. 135 * This test catches them, and is invoked elsewhere when setting 136 * appropriate config bits. 137 * 138 * FIXME: This treatment is probably applicable for *all* PCMCIA (PC CARD) 139 * devices, so in linux 2.3.x we should change this to just treat all 140 * PCMCIA drives this way, and get rid of the model-name tests below 141 * (too big of an interface change for 2.4.x). 142 * At that time, we might also consider parameterizing the timeouts and 143 * retries, since these are MUCH faster than mechanical drives. -M.Lord 144 */ 145 146static inline int drive_is_flashcard (ide_drive_t *drive) 147{ 148 struct hd_driveid *id = drive->id; 149 150 if (drive->removable) { 151 if (id->config == 0x848a) return 1; /* CompactFlash */ 152 if (!strncmp(id->model, "KODAK ATA_FLASH", 15) /* Kodak */ 153 || !strncmp(id->model, "Hitachi CV", 10) /* Hitachi */ 154 || !strncmp(id->model, "SunDisk SDCFB", 13) /* old SanDisk */ 155 || !strncmp(id->model, "SanDisk SDCFB", 13) /* SanDisk */ 156 || !strncmp(id->model, "HAGIWARA HPC", 12) /* Hagiwara */ 157 || !strncmp(id->model, "LEXAR ATA_FLASH", 15) /* Lexar */ 158 || !strncmp(id->model, "ATA_FLASH", 9)) /* Simple Tech */ 159 { 160 return 1; /* yes, it is a flash memory card */ 161 } 162 } 163 return 0; /* no, it is not a flash memory card */ 164} 165 166/** 167 * do_identify - identify a drive 168 * @drive: drive to identify 169 * @cmd: command used 170 * 171 * Called when we have issued a drive identify command to 172 * read and parse the results. This function is run with 173 * interrupts disabled. 174 */ 175 176static inline void do_identify (ide_drive_t *drive, u8 cmd) 177{ 178 ide_hwif_t *hwif = HWIF(drive); 179 int bswap = 1; 180 struct hd_driveid *id; 181 182 id = drive->id; 183 /* read 512 bytes of id info */ 184 hwif->ata_input_data(drive, id, SECTOR_WORDS); 185 186 drive->id_read = 1; 187 local_irq_enable(); 188 ide_fix_driveid(id); 189 190#if defined (CONFIG_SCSI_EATA_DMA) || defined (CONFIG_SCSI_EATA_PIO) || defined (CONFIG_SCSI_EATA) 191 /* 192 * EATA SCSI controllers do a hardware ATA emulation: 193 * Ignore them if there is a driver for them available. 194 */ 195 if ((id->model[0] == 'P' && id->model[1] == 'M') || 196 (id->model[0] == 'S' && id->model[1] == 'K')) { 197 printk("%s: EATA SCSI HBA %.10s\n", drive->name, id->model); 198 goto err_misc; 199 } 200#endif /* CONFIG_SCSI_EATA_DMA || CONFIG_SCSI_EATA_PIO */ 201 202 /* 203 * WIN_IDENTIFY returns little-endian info, 204 * WIN_PIDENTIFY *usually* returns little-endian info. 205 */ 206 if (cmd == WIN_PIDENTIFY) { 207 if ((id->model[0] == 'N' && id->model[1] == 'E') /* NEC */ 208 || (id->model[0] == 'F' && id->model[1] == 'X') /* Mitsumi */ 209 || (id->model[0] == 'P' && id->model[1] == 'i'))/* Pioneer */ 210 /* Vertos drives may still be weird */ 211 bswap ^= 1; 212 } 213 ide_fixstring(id->model, sizeof(id->model), bswap); 214 ide_fixstring(id->fw_rev, sizeof(id->fw_rev), bswap); 215 ide_fixstring(id->serial_no, sizeof(id->serial_no), bswap); 216 217 if (strstr(id->model, "E X A B Y T E N E S T")) 218 goto err_misc; 219 220 /* we depend on this a lot! */ 221 id->model[sizeof(id->model)-1] = '\0'; 222 printk("%s: %s, ", drive->name, id->model); 223 drive->present = 1; 224 drive->dead = 0; 225 226 /* 227 * Check for an ATAPI device 228 */ 229 if (cmd == WIN_PIDENTIFY) { 230 u8 type = (id->config >> 8) & 0x1f; 231 printk("ATAPI "); 232 switch (type) { 233 case ide_floppy: 234 if (!strstr(id->model, "CD-ROM")) { 235 if (!strstr(id->model, "oppy") && 236 !strstr(id->model, "poyp") && 237 !strstr(id->model, "ZIP")) 238 printk("cdrom or floppy?, assuming "); 239 if (drive->media != ide_cdrom) { 240 printk ("FLOPPY"); 241 drive->removable = 1; 242 break; 243 } 244 } 245 /* Early cdrom models used zero */ 246 type = ide_cdrom; 247 case ide_cdrom: 248 drive->removable = 1; 249#ifdef CONFIG_PPC 250 /* kludge for Apple PowerBook internal zip */ 251 if (!strstr(id->model, "CD-ROM") && 252 strstr(id->model, "ZIP")) { 253 printk ("FLOPPY"); 254 type = ide_floppy; 255 break; 256 } 257#endif 258 printk ("CD/DVD-ROM"); 259 break; 260 case ide_tape: 261 printk ("TAPE"); 262 break; 263 case ide_optical: 264 printk ("OPTICAL"); 265 drive->removable = 1; 266 break; 267 default: 268 printk("UNKNOWN (type %d)", type); 269 break; 270 } 271 printk (" drive\n"); 272 drive->media = type; 273 /* an ATAPI device ignores DRDY */ 274 drive->ready_stat = 0; 275 return; 276 } 277 278 /* 279 * Not an ATAPI device: looks like a "regular" hard disk 280 */ 281 if (id->config & (1<<7)) 282 drive->removable = 1; 283 284 if (drive_is_flashcard(drive)) 285 drive->is_flash = 1; 286 drive->media = ide_disk; 287 printk("%s DISK drive\n", (drive->is_flash) ? "CFA" : "ATA" ); 288 QUIRK_LIST(drive); 289 return; 290 291err_misc: 292 kfree(id); 293 drive->present = 0; 294 return; 295} 296 297/** 298 * actual_try_to_identify - send ata/atapi identify 299 * @drive: drive to identify 300 * @cmd: command to use 301 * 302 * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive 303 * and waits for a response. It also monitors irqs while this is 304 * happening, in hope of automatically determining which one is 305 * being used by the interface. 306 * 307 * Returns: 0 device was identified 308 * 1 device timed-out (no response to identify request) 309 * 2 device aborted the command (refused to identify itself) 310 */ 311 312static int actual_try_to_identify (ide_drive_t *drive, u8 cmd) 313{ 314 ide_hwif_t *hwif = HWIF(drive); 315 int rc; 316 unsigned long hd_status; 317 unsigned long timeout; 318 u8 s = 0, a = 0; 319 320 /* take a deep breath */ 321 msleep(50); 322 323 if (IDE_CONTROL_REG) { 324 a = hwif->INB(IDE_ALTSTATUS_REG); 325 s = hwif->INB(IDE_STATUS_REG); 326 if ((a ^ s) & ~INDEX_STAT) { 327 printk(KERN_INFO "%s: probing with STATUS(0x%02x) instead of " 328 "ALTSTATUS(0x%02x)\n", drive->name, s, a); 329 /* ancient Seagate drives, broken interfaces */ 330 hd_status = IDE_STATUS_REG; 331 } else { 332 /* use non-intrusive polling */ 333 hd_status = IDE_ALTSTATUS_REG; 334 } 335 } else 336 hd_status = IDE_STATUS_REG; 337 338 /* set features register for atapi 339 * identify command to be sure of reply 340 */ 341 if ((cmd == WIN_PIDENTIFY)) 342 /* disable dma & overlap */ 343 hwif->OUTB(0, IDE_FEATURE_REG); 344 345 /* ask drive for ID */ 346 hwif->OUTB(cmd, IDE_COMMAND_REG); 347 348 timeout = ((cmd == WIN_IDENTIFY) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2; 349 timeout += jiffies; 350 do { 351 if (time_after(jiffies, timeout)) { 352 /* drive timed-out */ 353 return 1; 354 } 355 /* give drive a breather */ 356 msleep(50); 357 } while ((hwif->INB(hd_status)) & BUSY_STAT); 358 359 /* wait for IRQ and DRQ_STAT */ 360 msleep(50); 361 if (OK_STAT((hwif->INB(IDE_STATUS_REG)), DRQ_STAT, BAD_R_STAT)) { 362 unsigned long flags; 363 364 /* local CPU only; some systems need this */ 365 local_irq_save(flags); 366 /* drive returned ID */ 367 do_identify(drive, cmd); 368 /* drive responded with ID */ 369 rc = 0; 370 /* clear drive IRQ */ 371 (void) hwif->INB(IDE_STATUS_REG); 372 local_irq_restore(flags); 373 } else { 374 /* drive refused ID */ 375 rc = 2; 376 } 377 return rc; 378} 379 380/** 381 * try_to_identify - try to identify a drive 382 * @drive: drive to probe 383 * @cmd: command to use 384 * 385 * Issue the identify command and then do IRQ probing to 386 * complete the identification when needed by finding the 387 * IRQ the drive is attached to 388 */ 389 390static int try_to_identify (ide_drive_t *drive, u8 cmd) 391{ 392 ide_hwif_t *hwif = HWIF(drive); 393 int retval; 394 int autoprobe = 0; 395 unsigned long cookie = 0; 396 397 /* 398 * Disable device irq unless we need to 399 * probe for it. Otherwise we'll get spurious 400 * interrupts during the identify-phase that 401 * the irq handler isn't expecting. 402 */ 403 if (IDE_CONTROL_REG) { 404 u8 ctl = drive->ctl | 2; 405 if (!hwif->irq) { 406 autoprobe = 1; 407 cookie = probe_irq_on(); 408 /* enable device irq */ 409 ctl &= ~2; 410 } 411 hwif->OUTB(ctl, IDE_CONTROL_REG); 412 } 413 414 retval = actual_try_to_identify(drive, cmd); 415 416 if (autoprobe) { 417 int irq; 418 /* mask device irq */ 419 hwif->OUTB(drive->ctl|2, IDE_CONTROL_REG); 420 /* clear drive IRQ */ 421 (void) hwif->INB(IDE_STATUS_REG); 422 udelay(5); 423 irq = probe_irq_off(cookie); 424 if (!hwif->irq) { 425 if (irq > 0) { 426 hwif->irq = irq; 427 } else { 428 /* Mmmm.. multiple IRQs.. 429 * don't know which was ours 430 */ 431 printk("%s: IRQ probe failed (0x%lx)\n", 432 drive->name, cookie); 433 } 434 } 435 } 436 return retval; 437} 438 439 440/** 441 * do_probe - probe an IDE device 442 * @drive: drive to probe 443 * @cmd: command to use 444 * 445 * do_probe() has the difficult job of finding a drive if it exists, 446 * without getting hung up if it doesn't exist, without trampling on 447 * ethernet cards, and without leaving any IRQs dangling to haunt us later. 448 * 449 * If a drive is "known" to exist (from CMOS or kernel parameters), 450 * but does not respond right away, the probe will "hang in there" 451 * for the maximum wait time (about 30 seconds), otherwise it will 452 * exit much more quickly. 453 * 454 * Returns: 0 device was identified 455 * 1 device timed-out (no response to identify request) 456 * 2 device aborted the command (refused to identify itself) 457 * 3 bad status from device (possible for ATAPI drives) 458 * 4 probe was not attempted because failure was obvious 459 */ 460 461static int do_probe (ide_drive_t *drive, u8 cmd) 462{ 463 int rc; 464 ide_hwif_t *hwif = HWIF(drive); 465 466 if (drive->present) { 467 /* avoid waiting for inappropriate probes */ 468 if ((drive->media != ide_disk) && (cmd == WIN_IDENTIFY)) 469 return 4; 470 } 471#ifdef DEBUG 472 printk("probing for %s: present=%d, media=%d, probetype=%s\n", 473 drive->name, drive->present, drive->media, 474 (cmd == WIN_IDENTIFY) ? "ATA" : "ATAPI"); 475#endif 476 477 /* needed for some systems 478 * (e.g. crw9624 as drive0 with disk as slave) 479 */ 480 msleep(50); 481 SELECT_DRIVE(drive); 482 msleep(50); 483 if (hwif->INB(IDE_SELECT_REG) != drive->select.all && !drive->present) { 484 if (drive->select.b.unit != 0) { 485 /* exit with drive0 selected */ 486 SELECT_DRIVE(&hwif->drives[0]); 487 /* allow BUSY_STAT to assert & clear */ 488 msleep(50); 489 } 490 /* no i/f present: mmm.. this should be a 4 -ml */ 491 return 3; 492 } 493 494 if (OK_STAT((hwif->INB(IDE_STATUS_REG)), READY_STAT, BUSY_STAT) || 495 drive->present || cmd == WIN_PIDENTIFY) { 496 /* send cmd and wait */ 497 if ((rc = try_to_identify(drive, cmd))) { 498 /* failed: try again */ 499 rc = try_to_identify(drive,cmd); 500 } 501 if (hwif->INB(IDE_STATUS_REG) == (BUSY_STAT|READY_STAT)) 502 return 4; 503 504 if ((rc == 1 && cmd == WIN_PIDENTIFY) && 505 ((drive->autotune == IDE_TUNE_DEFAULT) || 506 (drive->autotune == IDE_TUNE_AUTO))) { 507 unsigned long timeout; 508 printk("%s: no response (status = 0x%02x), " 509 "resetting drive\n", drive->name, 510 hwif->INB(IDE_STATUS_REG)); 511 msleep(50); 512 hwif->OUTB(drive->select.all, IDE_SELECT_REG); 513 msleep(50); 514 hwif->OUTB(WIN_SRST, IDE_COMMAND_REG); 515 timeout = jiffies; 516 while (((hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && 517 time_before(jiffies, timeout + WAIT_WORSTCASE)) 518 msleep(50); 519 rc = try_to_identify(drive, cmd); 520 } 521 if (rc == 1) 522 printk("%s: no response (status = 0x%02x)\n", 523 drive->name, hwif->INB(IDE_STATUS_REG)); 524 /* ensure drive irq is clear */ 525 (void) hwif->INB(IDE_STATUS_REG); 526 } else { 527 /* not present or maybe ATAPI */ 528 rc = 3; 529 } 530 if (drive->select.b.unit != 0) { 531 /* exit with drive0 selected */ 532 SELECT_DRIVE(&hwif->drives[0]); 533 msleep(50); 534 /* ensure drive irq is clear */ 535 (void) hwif->INB(IDE_STATUS_REG); 536 } 537 return rc; 538} 539 540/* 541 * 542 */ 543static void enable_nest (ide_drive_t *drive) 544{ 545 ide_hwif_t *hwif = HWIF(drive); 546 unsigned long timeout; 547 548 printk("%s: enabling %s -- ", hwif->name, drive->id->model); 549 SELECT_DRIVE(drive); 550 msleep(50); 551 hwif->OUTB(EXABYTE_ENABLE_NEST, IDE_COMMAND_REG); 552 timeout = jiffies + WAIT_WORSTCASE; 553 do { 554 if (time_after(jiffies, timeout)) { 555 printk("failed (timeout)\n"); 556 return; 557 } 558 msleep(50); 559 } while ((hwif->INB(IDE_STATUS_REG)) & BUSY_STAT); 560 561 msleep(50); 562 563 if (!OK_STAT((hwif->INB(IDE_STATUS_REG)), 0, BAD_STAT)) { 564 printk("failed (status = 0x%02x)\n", hwif->INB(IDE_STATUS_REG)); 565 } else { 566 printk("success\n"); 567 } 568 569 /* if !(success||timed-out) */ 570 if (do_probe(drive, WIN_IDENTIFY) >= 2) { 571 /* look for ATAPI device */ 572 (void) do_probe(drive, WIN_PIDENTIFY); 573 } 574} 575 576/** 577 * probe_for_drives - upper level drive probe 578 * @drive: drive to probe for 579 * 580 * probe_for_drive() tests for existence of a given drive using do_probe() 581 * and presents things to the user as needed. 582 * 583 * Returns: 0 no device was found 584 * 1 device was found (note: drive->present might 585 * still be 0) 586 */ 587 588static inline u8 probe_for_drive (ide_drive_t *drive) 589{ 590 /* 591 * In order to keep things simple we have an id 592 * block for all drives at all times. If the device 593 * is pre ATA or refuses ATA/ATAPI identify we 594 * will add faked data to this. 595 * 596 * Also note that 0 everywhere means "can't do X" 597 */ 598 599 drive->id = kzalloc(SECTOR_WORDS *4, GFP_KERNEL); 600 drive->id_read = 0; 601 if(drive->id == NULL) 602 { 603 printk(KERN_ERR "ide: out of memory for id data.\n"); 604 return 0; 605 } 606 strcpy(drive->id->model, "UNKNOWN"); 607 608 /* skip probing? */ 609 if (!drive->noprobe) 610 { 611 /* if !(success||timed-out) */ 612 if (do_probe(drive, WIN_IDENTIFY) >= 2) { 613 /* look for ATAPI device */ 614 (void) do_probe(drive, WIN_PIDENTIFY); 615 } 616 if (strstr(drive->id->model, "E X A B Y T E N E S T")) 617 enable_nest(drive); 618 if (!drive->present) 619 /* drive not found */ 620 return 0; 621 622 /* identification failed? */ 623 if (!drive->id_read) { 624 if (drive->media == ide_disk) { 625 printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n", 626 drive->name, drive->cyl, 627 drive->head, drive->sect); 628 } else if (drive->media == ide_cdrom) { 629 printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name); 630 } else { 631 /* nuke it */ 632 printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name); 633 drive->present = 0; 634 } 635 } 636 /* drive was found */ 637 } 638 if(!drive->present) 639 return 0; 640 /* The drive wasn't being helpful. Add generic info only */ 641 if (drive->id_read == 0) { 642 generic_id(drive); 643 return 1; 644 } 645 646 if (drive->media == ide_disk) { 647 ide_disk_init_chs(drive); 648 ide_disk_init_mult_count(drive); 649 } 650 651 return drive->present; 652} 653 654static void hwif_release_dev (struct device *dev) 655{ 656 ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev); 657 658 up(&hwif->gendev_rel_sem); 659} 660 661static void hwif_register (ide_hwif_t *hwif) 662{ 663 /* register with global device tree */ 664 strlcpy(hwif->gendev.bus_id,hwif->name,BUS_ID_SIZE); 665 hwif->gendev.driver_data = hwif; 666 if (hwif->gendev.parent == NULL) { 667 if (hwif->pci_dev) 668 hwif->gendev.parent = &hwif->pci_dev->dev; 669 else 670 /* Would like to do = &device_legacy */ 671 hwif->gendev.parent = NULL; 672 } 673 hwif->gendev.release = hwif_release_dev; 674 device_register(&hwif->gendev); 675} 676 677static int wait_hwif_ready(ide_hwif_t *hwif) 678{ 679 int rc; 680 681 printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name); 682 683 /* Let HW settle down a bit from whatever init state we 684 * come from */ 685 mdelay(2); 686 687 /* Wait for BSY bit to go away, spec timeout is 30 seconds, 688 * I know of at least one disk who takes 31 seconds, I use 35 689 * here to be safe 690 */ 691 rc = ide_wait_not_busy(hwif, 35000); 692 if (rc) 693 return rc; 694 695 /* Now make sure both master & slave are ready */ 696 SELECT_DRIVE(&hwif->drives[0]); 697 hwif->OUTB(8, hwif->io_ports[IDE_CONTROL_OFFSET]); 698 mdelay(2); 699 rc = ide_wait_not_busy(hwif, 35000); 700 if (rc) 701 return rc; 702 SELECT_DRIVE(&hwif->drives[1]); 703 hwif->OUTB(8, hwif->io_ports[IDE_CONTROL_OFFSET]); 704 mdelay(2); 705 rc = ide_wait_not_busy(hwif, 35000); 706 707 /* Exit function with master reselected (let's be sane) */ 708 SELECT_DRIVE(&hwif->drives[0]); 709 710 return rc; 711} 712 713/** 714 * ide_undecoded_slave - look for bad CF adapters 715 * @hwif: interface 716 * 717 * Analyse the drives on the interface and attempt to decide if we 718 * have the same drive viewed twice. This occurs with crap CF adapters 719 * and PCMCIA sometimes. 720 */ 721 722void ide_undecoded_slave(ide_hwif_t *hwif) 723{ 724 ide_drive_t *drive0 = &hwif->drives[0]; 725 ide_drive_t *drive1 = &hwif->drives[1]; 726 727 if (drive0->present == 0 || drive1->present == 0) 728 return; 729 730 /* If the models don't match they are not the same product */ 731 if (strcmp(drive0->id->model, drive1->id->model)) 732 return; 733 734 /* Serial numbers do not match */ 735 if (strncmp(drive0->id->serial_no, drive1->id->serial_no, 20)) 736 return; 737 738 /* No serial number, thankfully very rare for CF */ 739 if (drive0->id->serial_no[0] == 0) 740 return; 741 742 /* Appears to be an IDE flash adapter with decode bugs */ 743 printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n"); 744 745 drive1->present = 0; 746} 747 748EXPORT_SYMBOL_GPL(ide_undecoded_slave); 749 750/* 751 * This routine only knows how to look for drive units 0 and 1 752 * on an interface, so any setting of MAX_DRIVES > 2 won't work here. 753 */ 754static void probe_hwif(ide_hwif_t *hwif) 755{ 756 unsigned int unit; 757 unsigned long flags; 758 unsigned int irqd; 759 760 if (hwif->noprobe) 761 return; 762 763 if ((hwif->chipset != ide_4drives || !hwif->mate || !hwif->mate->present) && 764 (ide_hwif_request_regions(hwif))) { 765 u16 msgout = 0; 766 for (unit = 0; unit < MAX_DRIVES; ++unit) { 767 ide_drive_t *drive = &hwif->drives[unit]; 768 if (drive->present) { 769 drive->present = 0; 770 printk(KERN_ERR "%s: ERROR, PORTS ALREADY IN USE\n", 771 drive->name); 772 msgout = 1; 773 } 774 } 775 if (!msgout) 776 printk(KERN_ERR "%s: ports already in use, skipping probe\n", 777 hwif->name); 778 return; 779 } 780 781 /* 782 * We must always disable IRQ, as probe_for_drive will assert IRQ, but 783 * we'll install our IRQ driver much later... 784 */ 785 irqd = hwif->irq; 786 if (irqd) 787 disable_irq(hwif->irq); 788 789 local_irq_set(flags); 790 791 /* This is needed on some PPCs and a bunch of BIOS-less embedded 792 * platforms. Typical cases are: 793 * 794 * - The firmware hard reset the disk before booting the kernel, 795 * the drive is still doing it's poweron-reset sequence, that 796 * can take up to 30 seconds 797 * - The firmware does nothing (or no firmware), the device is 798 * still in POST state (same as above actually). 799 * - Some CD/DVD/Writer combo drives tend to drive the bus during 800 * their reset sequence even when they are non-selected slave 801 * devices, thus preventing discovery of the main HD 802 * 803 * Doing this wait-for-busy should not harm any existing configuration 804 * (at least things won't be worse than what current code does, that 805 * is blindly go & talk to the drive) and fix some issues like the 806 * above. 807 * 808 * BenH. 809 */ 810 if (wait_hwif_ready(hwif) == -EBUSY) 811 printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name); 812 813 /* 814 * Second drive should only exist if first drive was found, 815 * but a lot of cdrom drives are configured as single slaves. 816 */ 817 for (unit = 0; unit < MAX_DRIVES; ++unit) { 818 ide_drive_t *drive = &hwif->drives[unit]; 819 drive->dn = (hwif->channel ? 2 : 0) + unit; 820 (void) probe_for_drive(drive); 821 if (drive->present && !hwif->present) { 822 hwif->present = 1; 823 if (hwif->chipset != ide_4drives || 824 !hwif->mate || 825 !hwif->mate->present) { 826 hwif_register(hwif); 827 } 828 } 829 } 830 if (hwif->io_ports[IDE_CONTROL_OFFSET] && hwif->reset) { 831 unsigned long timeout = jiffies + WAIT_WORSTCASE; 832 u8 stat; 833 834 printk(KERN_WARNING "%s: reset\n", hwif->name); 835 hwif->OUTB(12, hwif->io_ports[IDE_CONTROL_OFFSET]); 836 udelay(10); 837 hwif->OUTB(8, hwif->io_ports[IDE_CONTROL_OFFSET]); 838 do { 839 msleep(50); 840 stat = hwif->INB(hwif->io_ports[IDE_STATUS_OFFSET]); 841 } while ((stat & BUSY_STAT) && time_after(timeout, jiffies)); 842 843 } 844 local_irq_restore(flags); 845 /* 846 * Use cached IRQ number. It might be (and is...) changed by probe 847 * code above 848 */ 849 if (irqd) 850 enable_irq(irqd); 851 852 if (!hwif->present) { 853 ide_hwif_release_regions(hwif); 854 return; 855 } 856 857 for (unit = 0; unit < MAX_DRIVES; ++unit) { 858 ide_drive_t *drive = &hwif->drives[unit]; 859 860 if (drive->present) { 861 if (hwif->tuneproc != NULL && 862 drive->autotune == IDE_TUNE_AUTO) 863 /* auto-tune PIO mode */ 864 hwif->tuneproc(drive, 255); 865 866 if (drive->autotune != IDE_TUNE_DEFAULT && 867 drive->autotune != IDE_TUNE_AUTO) 868 continue; 869 870 drive->nice1 = 1; 871 872 /* 873 * MAJOR HACK BARF :-/ 874 * 875 * FIXME: chipsets own this cruft! 876 */ 877 /* 878 * Move here to prevent module loading clashing. 879 */ 880 // drive->autodma = hwif->autodma; 881 if (hwif->ide_dma_check) { 882 /* 883 * Force DMAing for the beginning of the check. 884 * Some chipsets appear to do interesting 885 * things, if not checked and cleared. 886 * PARANOIA!!! 887 */ 888 hwif->ide_dma_off_quietly(drive); 889#ifdef CONFIG_IDEDMA_ONLYDISK 890 if (drive->media == ide_disk) 891#endif 892 hwif->ide_dma_check(drive); 893 } 894 } 895 } 896} 897 898static int hwif_init(ide_hwif_t *hwif); 899 900int probe_hwif_init_with_fixup(ide_hwif_t *hwif, void (*fixup)(ide_hwif_t *hwif)) 901{ 902 probe_hwif(hwif); 903 904 if (fixup) 905 fixup(hwif); 906 907 if (!hwif_init(hwif)) { 908 printk(KERN_INFO "%s: failed to initialize IDE interface\n", 909 hwif->name); 910 return -1; 911 } 912 913 if (hwif->present) { 914 u16 unit = 0; 915 for (unit = 0; unit < MAX_DRIVES; ++unit) { 916 ide_drive_t *drive = &hwif->drives[unit]; 917 /* For now don't attach absent drives, we may 918 want them on default or a new "empty" class 919 for hotplug reprobing ? */ 920 if (drive->present) { 921 device_register(&drive->gendev); 922 } 923 } 924 } 925 return 0; 926} 927 928int probe_hwif_init(ide_hwif_t *hwif) 929{ 930 return probe_hwif_init_with_fixup(hwif, NULL); 931} 932 933EXPORT_SYMBOL(probe_hwif_init); 934 935#if MAX_HWIFS > 1 936/* 937 * save_match() is used to simplify logic in init_irq() below. 938 * 939 * A loophole here is that we may not know about a particular 940 * hwif's irq until after that hwif is actually probed/initialized.. 941 * This could be a problem for the case where an hwif is on a 942 * dual interface that requires serialization (eg. cmd640) and another 943 * hwif using one of the same irqs is initialized beforehand. 944 * 945 * This routine detects and reports such situations, but does not fix them. 946 */ 947static void save_match(ide_hwif_t *hwif, ide_hwif_t *new, ide_hwif_t **match) 948{ 949 ide_hwif_t *m = *match; 950 951 if (m && m->hwgroup && m->hwgroup != new->hwgroup) { 952 if (!new->hwgroup) 953 return; 954 printk("%s: potential irq problem with %s and %s\n", 955 hwif->name, new->name, m->name); 956 } 957 if (!m || m->irq != hwif->irq) /* don't undo a prior perfect match */ 958 *match = new; 959} 960#endif /* MAX_HWIFS > 1 */ 961 962/* 963 * init request queue 964 */ 965static int ide_init_queue(ide_drive_t *drive) 966{ 967 request_queue_t *q; 968 ide_hwif_t *hwif = HWIF(drive); 969 int max_sectors = 256; 970 int max_sg_entries = PRD_ENTRIES; 971 972 /* 973 * Our default set up assumes the normal IDE case, 974 * that is 64K segmenting, standard PRD setup 975 * and LBA28. Some drivers then impose their own 976 * limits and LBA48 we could raise it but as yet 977 * do not. 978 */ 979 980 q = blk_init_queue_node(do_ide_request, &ide_lock, hwif_to_node(hwif)); 981 if (!q) 982 return 1; 983 984 q->queuedata = drive; 985 blk_queue_segment_boundary(q, 0xffff); 986 987 if (!hwif->rqsize) { 988 if (hwif->no_lba48 || hwif->no_lba48_dma) 989 hwif->rqsize = 256; 990 else 991 hwif->rqsize = 65536; 992 } 993 if (hwif->rqsize < max_sectors) 994 max_sectors = hwif->rqsize; 995 blk_queue_max_sectors(q, max_sectors); 996 997#ifdef CONFIG_PCI 998 /* When we have an IOMMU, we may have a problem where pci_map_sg() 999 * creates segments that don't completely match our boundary 1000 * requirements and thus need to be broken up again. Because it 1001 * doesn't align properly either, we may actually have to break up 1002 * to more segments than what was we got in the first place, a max 1003 * worst case is twice as many. 1004 * This will be fixed once we teach pci_map_sg() about our boundary 1005 * requirements, hopefully soon. *FIXME* 1006 */ 1007 if (!PCI_DMA_BUS_IS_PHYS) 1008 max_sg_entries >>= 1; 1009#endif /* CONFIG_PCI */ 1010 1011 blk_queue_max_hw_segments(q, max_sg_entries); 1012 blk_queue_max_phys_segments(q, max_sg_entries); 1013 1014 /* assign drive queue */ 1015 drive->queue = q; 1016 1017 /* needs drive->queue to be set */ 1018 ide_toggle_bounce(drive, 1); 1019 1020 /* enable led activity for disk drives only */ 1021 if (drive->media == ide_disk && hwif->led_act) 1022 blk_queue_activity_fn(q, hwif->led_act, drive); 1023 1024 return 0; 1025} 1026 1027/* 1028 * This routine sets up the irq for an ide interface, and creates a new 1029 * hwgroup for the irq/hwif if none was previously assigned. 1030 * 1031 * Much of the code is for correctly detecting/handling irq sharing 1032 * and irq serialization situations. This is somewhat complex because 1033 * it handles static as well as dynamic (PCMCIA) IDE interfaces. 1034 * 1035 * The SA_INTERRUPT in sa_flags means ide_intr() is always entered with 1036 * interrupts completely disabled. This can be bad for interrupt latency, 1037 * but anything else has led to problems on some machines. We re-enable 1038 * interrupts as much as we can safely do in most places. 1039 */ 1040static int init_irq (ide_hwif_t *hwif) 1041{ 1042 unsigned int index; 1043 ide_hwgroup_t *hwgroup; 1044 ide_hwif_t *match = NULL; 1045 1046 1047 BUG_ON(in_interrupt()); 1048 BUG_ON(irqs_disabled()); 1049 BUG_ON(hwif == NULL); 1050 1051 down(&ide_cfg_sem); 1052 hwif->hwgroup = NULL; 1053#if MAX_HWIFS > 1 1054 /* 1055 * Group up with any other hwifs that share our irq(s). 1056 */ 1057 for (index = 0; index < MAX_HWIFS; index++) { 1058 ide_hwif_t *h = &ide_hwifs[index]; 1059 if (h->hwgroup) { /* scan only initialized hwif's */ 1060 if (hwif->irq == h->irq) { 1061 hwif->sharing_irq = h->sharing_irq = 1; 1062 if (hwif->chipset != ide_pci || 1063 h->chipset != ide_pci) { 1064 save_match(hwif, h, &match); 1065 } 1066 } 1067 if (hwif->serialized) { 1068 if (hwif->mate && hwif->mate->irq == h->irq) 1069 save_match(hwif, h, &match); 1070 } 1071 if (h->serialized) { 1072 if (h->mate && hwif->irq == h->mate->irq) 1073 save_match(hwif, h, &match); 1074 } 1075 } 1076 } 1077#endif /* MAX_HWIFS > 1 */ 1078 /* 1079 * If we are still without a hwgroup, then form a new one 1080 */ 1081 if (match) { 1082 hwgroup = match->hwgroup; 1083 hwif->hwgroup = hwgroup; 1084 /* 1085 * Link us into the hwgroup. 1086 * This must be done early, do ensure that unexpected_intr 1087 * can find the hwif and prevent irq storms. 1088 * No drives are attached to the new hwif, choose_drive 1089 * can't do anything stupid (yet). 1090 * Add ourself as the 2nd entry to the hwgroup->hwif 1091 * linked list, the first entry is the hwif that owns 1092 * hwgroup->handler - do not change that. 1093 */ 1094 spin_lock_irq(&ide_lock); 1095 hwif->next = hwgroup->hwif->next; 1096 hwgroup->hwif->next = hwif; 1097 spin_unlock_irq(&ide_lock); 1098 } else { 1099 hwgroup = kmalloc_node(sizeof(ide_hwgroup_t), GFP_KERNEL, 1100 hwif_to_node(hwif->drives[0].hwif)); 1101 if (!hwgroup) 1102 goto out_up; 1103 1104 hwif->hwgroup = hwgroup; 1105 1106 memset(hwgroup, 0, sizeof(ide_hwgroup_t)); 1107 hwgroup->hwif = hwif->next = hwif; 1108 hwgroup->rq = NULL; 1109 hwgroup->handler = NULL; 1110 hwgroup->drive = NULL; 1111 hwgroup->busy = 0; 1112 init_timer(&hwgroup->timer); 1113 hwgroup->timer.function = &ide_timer_expiry; 1114 hwgroup->timer.data = (unsigned long) hwgroup; 1115 } 1116 1117 /* 1118 * Allocate the irq, if not already obtained for another hwif 1119 */ 1120 if (!match || match->irq != hwif->irq) { 1121 int sa = SA_INTERRUPT; 1122#if defined(__mc68000__) || defined(CONFIG_APUS) 1123 sa = SA_SHIRQ; 1124#endif /* __mc68000__ || CONFIG_APUS */ 1125 1126 if (IDE_CHIPSET_IS_PCI(hwif->chipset)) { 1127 sa = SA_SHIRQ; 1128#ifndef CONFIG_IDEPCI_SHARE_IRQ 1129 sa |= SA_INTERRUPT; 1130#endif /* CONFIG_IDEPCI_SHARE_IRQ */ 1131 } 1132 1133 if (hwif->io_ports[IDE_CONTROL_OFFSET]) 1134 /* clear nIEN */ 1135 hwif->OUTB(0x08, hwif->io_ports[IDE_CONTROL_OFFSET]); 1136 1137 if (request_irq(hwif->irq,&ide_intr,sa,hwif->name,hwgroup)) 1138 goto out_unlink; 1139 } 1140 1141 /* 1142 * For any present drive: 1143 * - allocate the block device queue 1144 * - link drive into the hwgroup 1145 */ 1146 for (index = 0; index < MAX_DRIVES; ++index) { 1147 ide_drive_t *drive = &hwif->drives[index]; 1148 if (!drive->present) 1149 continue; 1150 if (ide_init_queue(drive)) { 1151 printk(KERN_ERR "ide: failed to init %s\n",drive->name); 1152 continue; 1153 } 1154 spin_lock_irq(&ide_lock); 1155 if (!hwgroup->drive) { 1156 /* first drive for hwgroup. */ 1157 drive->next = drive; 1158 hwgroup->drive = drive; 1159 hwgroup->hwif = HWIF(hwgroup->drive); 1160 } else { 1161 drive->next = hwgroup->drive->next; 1162 hwgroup->drive->next = drive; 1163 } 1164 spin_unlock_irq(&ide_lock); 1165 } 1166 1167#if !defined(__mc68000__) && !defined(CONFIG_APUS) && !defined(__sparc__) 1168 printk("%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name, 1169 hwif->io_ports[IDE_DATA_OFFSET], 1170 hwif->io_ports[IDE_DATA_OFFSET]+7, 1171 hwif->io_ports[IDE_CONTROL_OFFSET], hwif->irq); 1172#elif defined(__sparc__) 1173 printk("%s at 0x%03lx-0x%03lx,0x%03lx on irq %s", hwif->name, 1174 hwif->io_ports[IDE_DATA_OFFSET], 1175 hwif->io_ports[IDE_DATA_OFFSET]+7, 1176 hwif->io_ports[IDE_CONTROL_OFFSET], __irq_itoa(hwif->irq)); 1177#else 1178 printk("%s at 0x%08lx on irq %d", hwif->name, 1179 hwif->io_ports[IDE_DATA_OFFSET], hwif->irq); 1180#endif /* __mc68000__ && CONFIG_APUS */ 1181 if (match) 1182 printk(" (%sed with %s)", 1183 hwif->sharing_irq ? "shar" : "serializ", match->name); 1184 printk("\n"); 1185 up(&ide_cfg_sem); 1186 return 0; 1187out_unlink: 1188 spin_lock_irq(&ide_lock); 1189 if (hwif->next == hwif) { 1190 BUG_ON(match); 1191 BUG_ON(hwgroup->hwif != hwif); 1192 kfree(hwgroup); 1193 } else { 1194 ide_hwif_t *g; 1195 g = hwgroup->hwif; 1196 while (g->next != hwif) 1197 g = g->next; 1198 g->next = hwif->next; 1199 if (hwgroup->hwif == hwif) { 1200 /* Impossible. */ 1201 printk(KERN_ERR "Duh. Uninitialized hwif listed as active hwif.\n"); 1202 hwgroup->hwif = g; 1203 } 1204 BUG_ON(hwgroup->hwif == hwif); 1205 } 1206 spin_unlock_irq(&ide_lock); 1207out_up: 1208 up(&ide_cfg_sem); 1209 return 1; 1210} 1211 1212static int ata_lock(dev_t dev, void *data) 1213{ 1214 /* FIXME: we want to pin hwif down */ 1215 return 0; 1216} 1217 1218static struct kobject *ata_probe(dev_t dev, int *part, void *data) 1219{ 1220 ide_hwif_t *hwif = data; 1221 int unit = *part >> PARTN_BITS; 1222 ide_drive_t *drive = &hwif->drives[unit]; 1223 if (!drive->present) 1224 return NULL; 1225 1226 if (drive->media == ide_disk) 1227 request_module("ide-disk"); 1228 if (drive->scsi) 1229 request_module("ide-scsi"); 1230 if (drive->media == ide_cdrom || drive->media == ide_optical) 1231 request_module("ide-cd"); 1232 if (drive->media == ide_tape) 1233 request_module("ide-tape"); 1234 if (drive->media == ide_floppy) 1235 request_module("ide-floppy"); 1236 1237 return NULL; 1238} 1239 1240static struct kobject *exact_match(dev_t dev, int *part, void *data) 1241{ 1242 struct gendisk *p = data; 1243 *part &= (1 << PARTN_BITS) - 1; 1244 return &p->kobj; 1245} 1246 1247static int exact_lock(dev_t dev, void *data) 1248{ 1249 struct gendisk *p = data; 1250 1251 if (!get_disk(p)) 1252 return -1; 1253 return 0; 1254} 1255 1256void ide_register_region(struct gendisk *disk) 1257{ 1258 blk_register_region(MKDEV(disk->major, disk->first_minor), 1259 disk->minors, NULL, exact_match, exact_lock, disk); 1260} 1261 1262EXPORT_SYMBOL_GPL(ide_register_region); 1263 1264void ide_unregister_region(struct gendisk *disk) 1265{ 1266 blk_unregister_region(MKDEV(disk->major, disk->first_minor), 1267 disk->minors); 1268} 1269 1270EXPORT_SYMBOL_GPL(ide_unregister_region); 1271 1272void ide_init_disk(struct gendisk *disk, ide_drive_t *drive) 1273{ 1274 ide_hwif_t *hwif = drive->hwif; 1275 unsigned int unit = (drive->select.all >> 4) & 1; 1276 1277 disk->major = hwif->major; 1278 disk->first_minor = unit << PARTN_BITS; 1279 sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit); 1280 disk->queue = drive->queue; 1281} 1282 1283EXPORT_SYMBOL_GPL(ide_init_disk); 1284 1285static void ide_remove_drive_from_hwgroup(ide_drive_t *drive) 1286{ 1287 ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; 1288 1289 if (drive == drive->next) { 1290 /* special case: last drive from hwgroup. */ 1291 BUG_ON(hwgroup->drive != drive); 1292 hwgroup->drive = NULL; 1293 } else { 1294 ide_drive_t *walk; 1295 1296 walk = hwgroup->drive; 1297 while (walk->next != drive) 1298 walk = walk->next; 1299 walk->next = drive->next; 1300 if (hwgroup->drive == drive) { 1301 hwgroup->drive = drive->next; 1302 hwgroup->hwif = hwgroup->drive->hwif; 1303 } 1304 } 1305 BUG_ON(hwgroup->drive == drive); 1306} 1307 1308static void drive_release_dev (struct device *dev) 1309{ 1310 ide_drive_t *drive = container_of(dev, ide_drive_t, gendev); 1311 1312 spin_lock_irq(&ide_lock); 1313 if (drive->devfs_name[0] != '\0') { 1314 devfs_remove(drive->devfs_name); 1315 drive->devfs_name[0] = '\0'; 1316 } 1317 ide_remove_drive_from_hwgroup(drive); 1318 kfree(drive->id); 1319 drive->id = NULL; 1320 drive->present = 0; 1321 /* Messed up locking ... */ 1322 spin_unlock_irq(&ide_lock); 1323 blk_cleanup_queue(drive->queue); 1324 spin_lock_irq(&ide_lock); 1325 drive->queue = NULL; 1326 spin_unlock_irq(&ide_lock); 1327 1328 up(&drive->gendev_rel_sem); 1329} 1330 1331/* 1332 * init_gendisk() (as opposed to ide_geninit) is called for each major device, 1333 * after probing for drives, to allocate partition tables and other data 1334 * structures needed for the routines in genhd.c. ide_geninit() gets called 1335 * somewhat later, during the partition check. 1336 */ 1337static void init_gendisk (ide_hwif_t *hwif) 1338{ 1339 unsigned int unit; 1340 1341 for (unit = 0; unit < MAX_DRIVES; ++unit) { 1342 ide_drive_t * drive = &hwif->drives[unit]; 1343 ide_add_generic_settings(drive); 1344 snprintf(drive->gendev.bus_id,BUS_ID_SIZE,"%u.%u", 1345 hwif->index,unit); 1346 drive->gendev.parent = &hwif->gendev; 1347 drive->gendev.bus = &ide_bus_type; 1348 drive->gendev.driver_data = drive; 1349 drive->gendev.release = drive_release_dev; 1350 if (drive->present) { 1351 sprintf(drive->devfs_name, "ide/host%d/bus%d/target%d/lun%d", 1352 (hwif->channel && hwif->mate) ? 1353 hwif->mate->index : hwif->index, 1354 hwif->channel, unit, drive->lun); 1355 } 1356 } 1357 blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS, 1358 THIS_MODULE, ata_probe, ata_lock, hwif); 1359} 1360 1361static int hwif_init(ide_hwif_t *hwif) 1362{ 1363 int old_irq; 1364 1365 /* Return success if no device is connected */ 1366 if (!hwif->present) 1367 return 1; 1368 1369 if (!hwif->irq) { 1370 if (!(hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET]))) 1371 { 1372 printk("%s: DISABLED, NO IRQ\n", hwif->name); 1373 return (hwif->present = 0); 1374 } 1375 } 1376#ifdef CONFIG_BLK_DEV_HD 1377 if (hwif->irq == HD_IRQ && hwif->io_ports[IDE_DATA_OFFSET] != HD_DATA) { 1378 printk("%s: CANNOT SHARE IRQ WITH OLD " 1379 "HARDDISK DRIVER (hd.c)\n", hwif->name); 1380 return (hwif->present = 0); 1381 } 1382#endif /* CONFIG_BLK_DEV_HD */ 1383 1384 /* we set it back to 1 if all is ok below */ 1385 hwif->present = 0; 1386 1387 if (register_blkdev(hwif->major, hwif->name)) 1388 return 0; 1389 1390 if (!hwif->sg_max_nents) 1391 hwif->sg_max_nents = PRD_ENTRIES; 1392 1393 hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents, 1394 GFP_KERNEL); 1395 if (!hwif->sg_table) { 1396 printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name); 1397 goto out; 1398 } 1399 1400 if (init_irq(hwif) == 0) 1401 goto done; 1402 1403 old_irq = hwif->irq; 1404 /* 1405 * It failed to initialise. Find the default IRQ for 1406 * this port and try that. 1407 */ 1408 if (!(hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET]))) { 1409 printk("%s: Disabled unable to get IRQ %d.\n", 1410 hwif->name, old_irq); 1411 goto out; 1412 } 1413 if (init_irq(hwif)) { 1414 printk("%s: probed IRQ %d and default IRQ %d failed.\n", 1415 hwif->name, old_irq, hwif->irq); 1416 goto out; 1417 } 1418 printk("%s: probed IRQ %d failed, using default.\n", 1419 hwif->name, hwif->irq); 1420 1421done: 1422 init_gendisk(hwif); 1423 hwif->present = 1; /* success */ 1424 return 1; 1425 1426out: 1427 unregister_blkdev(hwif->major, hwif->name); 1428 return 0; 1429} 1430 1431int ideprobe_init (void) 1432{ 1433 unsigned int index; 1434 int probe[MAX_HWIFS]; 1435 1436 memset(probe, 0, MAX_HWIFS * sizeof(int)); 1437 for (index = 0; index < MAX_HWIFS; ++index) 1438 probe[index] = !ide_hwifs[index].present; 1439 1440 for (index = 0; index < MAX_HWIFS; ++index) 1441 if (probe[index]) 1442 probe_hwif(&ide_hwifs[index]); 1443 for (index = 0; index < MAX_HWIFS; ++index) 1444 if (probe[index]) 1445 hwif_init(&ide_hwifs[index]); 1446 for (index = 0; index < MAX_HWIFS; ++index) { 1447 if (probe[index]) { 1448 ide_hwif_t *hwif = &ide_hwifs[index]; 1449 int unit; 1450 if (!hwif->present) 1451 continue; 1452 if (hwif->chipset == ide_unknown || hwif->chipset == ide_forced) 1453 hwif->chipset = ide_generic; 1454 for (unit = 0; unit < MAX_DRIVES; ++unit) 1455 if (hwif->drives[unit].present) 1456 device_register(&hwif->drives[unit].gendev); 1457 } 1458 } 1459 return 0; 1460} 1461 1462EXPORT_SYMBOL_GPL(ideprobe_init); 1463