ide-probe.c revision 1bd4c1f4fe6607a0253d1318847b618a2a598612
1/* 2 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below) 3 * Copyright (C) 2005, 2007 Bartlomiej Zolnierkiewicz 4 */ 5 6/* 7 * Mostly written by Mark Lord <mlord@pobox.com> 8 * and Gadi Oxman <gadio@netvision.net.il> 9 * and Andre Hedrick <andre@linux-ide.org> 10 * 11 * See linux/MAINTAINERS for address of current maintainer. 12 * 13 * This is the IDE probe module, as evolved from hd.c and ide.c. 14 * 15 * -- increase WAIT_PIDENTIFY to avoid CD-ROM locking at boot 16 * by Andrea Arcangeli 17 */ 18 19#include <linux/module.h> 20#include <linux/types.h> 21#include <linux/string.h> 22#include <linux/kernel.h> 23#include <linux/timer.h> 24#include <linux/mm.h> 25#include <linux/interrupt.h> 26#include <linux/major.h> 27#include <linux/errno.h> 28#include <linux/genhd.h> 29#include <linux/slab.h> 30#include <linux/delay.h> 31#include <linux/ide.h> 32#include <linux/spinlock.h> 33#include <linux/kmod.h> 34#include <linux/pci.h> 35#include <linux/scatterlist.h> 36 37#include <asm/byteorder.h> 38#include <asm/irq.h> 39#include <asm/uaccess.h> 40#include <asm/io.h> 41 42/** 43 * generic_id - add a generic drive id 44 * @drive: drive to make an ID block for 45 * 46 * Add a fake id field to the drive we are passed. This allows 47 * use to skip a ton of NULL checks (which people always miss) 48 * and make drive properties unconditional outside of this file 49 */ 50 51static void generic_id(ide_drive_t *drive) 52{ 53 u16 *id = drive->id; 54 55 id[ATA_ID_CUR_CYLS] = id[ATA_ID_CYLS] = drive->cyl; 56 id[ATA_ID_CUR_HEADS] = id[ATA_ID_HEADS] = drive->head; 57 id[ATA_ID_CUR_SECTORS] = id[ATA_ID_SECTORS] = drive->sect; 58} 59 60static void ide_disk_init_chs(ide_drive_t *drive) 61{ 62 u16 *id = drive->id; 63 64 /* Extract geometry if we did not already have one for the drive */ 65 if (!drive->cyl || !drive->head || !drive->sect) { 66 drive->cyl = drive->bios_cyl = id[ATA_ID_CYLS]; 67 drive->head = drive->bios_head = id[ATA_ID_HEADS]; 68 drive->sect = drive->bios_sect = id[ATA_ID_SECTORS]; 69 } 70 71 /* Handle logical geometry translation by the drive */ 72 if (ata_id_current_chs_valid(id)) { 73 drive->cyl = id[ATA_ID_CUR_CYLS]; 74 drive->head = id[ATA_ID_CUR_HEADS]; 75 drive->sect = id[ATA_ID_CUR_SECTORS]; 76 } 77 78 /* Use physical geometry if what we have still makes no sense */ 79 if (drive->head > 16 && id[ATA_ID_HEADS] && id[ATA_ID_HEADS] <= 16) { 80 drive->cyl = id[ATA_ID_CYLS]; 81 drive->head = id[ATA_ID_HEADS]; 82 drive->sect = id[ATA_ID_SECTORS]; 83 } 84} 85 86static void ide_disk_init_mult_count(ide_drive_t *drive) 87{ 88 u16 *id = drive->id; 89 u8 max_multsect = id[ATA_ID_MAX_MULTSECT] & 0xff; 90 91 if (max_multsect) { 92 if ((max_multsect / 2) > 1) 93 id[ATA_ID_MULTSECT] = max_multsect | 0x100; 94 else 95 id[ATA_ID_MULTSECT] &= ~0x1ff; 96 97 drive->mult_req = id[ATA_ID_MULTSECT] & 0xff; 98 99 if (drive->mult_req) 100 drive->special.b.set_multmode = 1; 101 } 102} 103 104static void ide_classify_ata_dev(ide_drive_t *drive) 105{ 106 u16 *id = drive->id; 107 char *m = (char *)&id[ATA_ID_PROD]; 108 int is_cfa = ata_id_is_cfa(id); 109 110 /* CF devices are *not* removable in Linux definition of the term */ 111 if (is_cfa == 0 && (id[ATA_ID_CONFIG] & (1 << 7))) 112 drive->dev_flags |= IDE_DFLAG_REMOVABLE; 113 114 drive->media = ide_disk; 115 116 if (!ata_id_has_unload(drive->id)) 117 drive->dev_flags |= IDE_DFLAG_NO_UNLOAD; 118 119 printk(KERN_INFO "%s: %s, %s DISK drive\n", drive->name, m, 120 is_cfa ? "CFA" : "ATA"); 121} 122 123static void ide_classify_atapi_dev(ide_drive_t *drive) 124{ 125 u16 *id = drive->id; 126 char *m = (char *)&id[ATA_ID_PROD]; 127 u8 type = (id[ATA_ID_CONFIG] >> 8) & 0x1f; 128 129 printk(KERN_INFO "%s: %s, ATAPI ", drive->name, m); 130 switch (type) { 131 case ide_floppy: 132 if (!strstr(m, "CD-ROM")) { 133 if (!strstr(m, "oppy") && 134 !strstr(m, "poyp") && 135 !strstr(m, "ZIP")) 136 printk(KERN_CONT "cdrom or floppy?, assuming "); 137 if (drive->media != ide_cdrom) { 138 printk(KERN_CONT "FLOPPY"); 139 drive->dev_flags |= IDE_DFLAG_REMOVABLE; 140 break; 141 } 142 } 143 /* Early cdrom models used zero */ 144 type = ide_cdrom; 145 case ide_cdrom: 146 drive->dev_flags |= IDE_DFLAG_REMOVABLE; 147#ifdef CONFIG_PPC 148 /* kludge for Apple PowerBook internal zip */ 149 if (!strstr(m, "CD-ROM") && strstr(m, "ZIP")) { 150 printk(KERN_CONT "FLOPPY"); 151 type = ide_floppy; 152 break; 153 } 154#endif 155 printk(KERN_CONT "CD/DVD-ROM"); 156 break; 157 case ide_tape: 158 printk(KERN_CONT "TAPE"); 159 break; 160 case ide_optical: 161 printk(KERN_CONT "OPTICAL"); 162 drive->dev_flags |= IDE_DFLAG_REMOVABLE; 163 break; 164 default: 165 printk(KERN_CONT "UNKNOWN (type %d)", type); 166 break; 167 } 168 169 printk(KERN_CONT " drive\n"); 170 drive->media = type; 171 /* an ATAPI device ignores DRDY */ 172 drive->ready_stat = 0; 173 if (ata_id_cdb_intr(id)) 174 drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT; 175 drive->dev_flags |= IDE_DFLAG_DOORLOCKING; 176 /* we don't do head unloading on ATAPI devices */ 177 drive->dev_flags |= IDE_DFLAG_NO_UNLOAD; 178} 179 180/** 181 * do_identify - identify a drive 182 * @drive: drive to identify 183 * @cmd: command used 184 * 185 * Called when we have issued a drive identify command to 186 * read and parse the results. This function is run with 187 * interrupts disabled. 188 */ 189 190static void do_identify(ide_drive_t *drive, u8 cmd) 191{ 192 ide_hwif_t *hwif = drive->hwif; 193 u16 *id = drive->id; 194 char *m = (char *)&id[ATA_ID_PROD]; 195 unsigned long flags; 196 int bswap = 1; 197 198 /* local CPU only; some systems need this */ 199 local_irq_save(flags); 200 /* read 512 bytes of id info */ 201 hwif->tp_ops->input_data(drive, NULL, id, SECTOR_SIZE); 202 local_irq_restore(flags); 203 204 drive->dev_flags |= IDE_DFLAG_ID_READ; 205#ifdef DEBUG 206 printk(KERN_INFO "%s: dumping identify data\n", drive->name); 207 ide_dump_identify((u8 *)id); 208#endif 209 ide_fix_driveid(id); 210 211 /* 212 * ATA_CMD_ID_ATA returns little-endian info, 213 * ATA_CMD_ID_ATAPI *usually* returns little-endian info. 214 */ 215 if (cmd == ATA_CMD_ID_ATAPI) { 216 if ((m[0] == 'N' && m[1] == 'E') || /* NEC */ 217 (m[0] == 'F' && m[1] == 'X') || /* Mitsumi */ 218 (m[0] == 'P' && m[1] == 'i')) /* Pioneer */ 219 /* Vertos drives may still be weird */ 220 bswap ^= 1; 221 } 222 223 ide_fixstring(m, ATA_ID_PROD_LEN, bswap); 224 ide_fixstring((char *)&id[ATA_ID_FW_REV], ATA_ID_FW_REV_LEN, bswap); 225 ide_fixstring((char *)&id[ATA_ID_SERNO], ATA_ID_SERNO_LEN, bswap); 226 227 /* we depend on this a lot! */ 228 m[ATA_ID_PROD_LEN - 1] = '\0'; 229 230 if (strstr(m, "E X A B Y T E N E S T")) 231 goto err_misc; 232 233 drive->dev_flags |= IDE_DFLAG_PRESENT; 234 drive->dev_flags &= ~IDE_DFLAG_DEAD; 235 236 return; 237err_misc: 238 kfree(id); 239 drive->dev_flags &= ~IDE_DFLAG_PRESENT; 240} 241 242/** 243 * try_to_identify - send ATA/ATAPI identify 244 * @drive: drive to identify 245 * @cmd: command to use 246 * 247 * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive 248 * and waits for a response. 249 * 250 * Returns: 0 device was identified 251 * 1 device timed-out (no response to identify request) 252 * 2 device aborted the command (refused to identify itself) 253 */ 254 255static int try_to_identify(ide_drive_t *drive, u8 cmd) 256{ 257 ide_hwif_t *hwif = drive->hwif; 258 struct ide_io_ports *io_ports = &hwif->io_ports; 259 const struct ide_tp_ops *tp_ops = hwif->tp_ops; 260 int use_altstatus = 0, rc; 261 unsigned long timeout; 262 u8 s = 0, a = 0; 263 264 /* 265 * Disable device IRQ. Otherwise we'll get spurious interrupts 266 * during the identify phase that the IRQ handler isn't expecting. 267 */ 268 if (io_ports->ctl_addr) 269 tp_ops->set_irq(hwif, 0); 270 271 /* take a deep breath */ 272 msleep(50); 273 274 if (io_ports->ctl_addr && 275 (hwif->host_flags & IDE_HFLAG_BROKEN_ALTSTATUS) == 0) { 276 a = tp_ops->read_altstatus(hwif); 277 s = tp_ops->read_status(hwif); 278 if ((a ^ s) & ~ATA_IDX) 279 /* ancient Seagate drives, broken interfaces */ 280 printk(KERN_INFO "%s: probing with STATUS(0x%02x) " 281 "instead of ALTSTATUS(0x%02x)\n", 282 drive->name, s, a); 283 else 284 /* use non-intrusive polling */ 285 use_altstatus = 1; 286 } 287 288 /* set features register for atapi 289 * identify command to be sure of reply 290 */ 291 if (cmd == ATA_CMD_ID_ATAPI) { 292 ide_task_t task; 293 294 memset(&task, 0, sizeof(task)); 295 /* disable DMA & overlap */ 296 task.tf_flags = IDE_TFLAG_OUT_FEATURE; 297 298 tp_ops->tf_load(drive, &task); 299 } 300 301 /* ask drive for ID */ 302 tp_ops->exec_command(hwif, cmd); 303 304 timeout = ((cmd == ATA_CMD_ID_ATA) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2; 305 306 if (ide_busy_sleep(hwif, timeout, use_altstatus)) 307 return 1; 308 309 /* wait for IRQ and ATA_DRQ */ 310 msleep(50); 311 s = tp_ops->read_status(hwif); 312 313 if (OK_STAT(s, ATA_DRQ, BAD_R_STAT)) { 314 /* drive returned ID */ 315 do_identify(drive, cmd); 316 /* drive responded with ID */ 317 rc = 0; 318 /* clear drive IRQ */ 319 (void)tp_ops->read_status(hwif); 320 } else { 321 /* drive refused ID */ 322 rc = 2; 323 } 324 return rc; 325} 326 327int ide_busy_sleep(ide_hwif_t *hwif, unsigned long timeout, int altstatus) 328{ 329 u8 stat; 330 331 timeout += jiffies; 332 333 do { 334 msleep(50); /* give drive a breather */ 335 stat = altstatus ? hwif->tp_ops->read_altstatus(hwif) 336 : hwif->tp_ops->read_status(hwif); 337 if ((stat & ATA_BUSY) == 0) 338 return 0; 339 } while (time_before(jiffies, timeout)); 340 341 return 1; /* drive timed-out */ 342} 343 344static u8 ide_read_device(ide_drive_t *drive) 345{ 346 ide_task_t task; 347 348 memset(&task, 0, sizeof(task)); 349 task.tf_flags = IDE_TFLAG_IN_DEVICE; 350 351 drive->hwif->tp_ops->tf_read(drive, &task); 352 353 return task.tf.device; 354} 355 356/** 357 * do_probe - probe an IDE device 358 * @drive: drive to probe 359 * @cmd: command to use 360 * 361 * do_probe() has the difficult job of finding a drive if it exists, 362 * without getting hung up if it doesn't exist, without trampling on 363 * ethernet cards, and without leaving any IRQs dangling to haunt us later. 364 * 365 * If a drive is "known" to exist (from CMOS or kernel parameters), 366 * but does not respond right away, the probe will "hang in there" 367 * for the maximum wait time (about 30 seconds), otherwise it will 368 * exit much more quickly. 369 * 370 * Returns: 0 device was identified 371 * 1 device timed-out (no response to identify request) 372 * 2 device aborted the command (refused to identify itself) 373 * 3 bad status from device (possible for ATAPI drives) 374 * 4 probe was not attempted because failure was obvious 375 */ 376 377static int do_probe (ide_drive_t *drive, u8 cmd) 378{ 379 ide_hwif_t *hwif = drive->hwif; 380 const struct ide_tp_ops *tp_ops = hwif->tp_ops; 381 int rc; 382 u8 present = !!(drive->dev_flags & IDE_DFLAG_PRESENT), stat; 383 384 /* avoid waiting for inappropriate probes */ 385 if (present && drive->media != ide_disk && cmd == ATA_CMD_ID_ATA) 386 return 4; 387 388#ifdef DEBUG 389 printk(KERN_INFO "probing for %s: present=%d, media=%d, probetype=%s\n", 390 drive->name, present, drive->media, 391 (cmd == ATA_CMD_ID_ATA) ? "ATA" : "ATAPI"); 392#endif 393 394 /* needed for some systems 395 * (e.g. crw9624 as drive0 with disk as slave) 396 */ 397 msleep(50); 398 SELECT_DRIVE(drive); 399 msleep(50); 400 401 if (ide_read_device(drive) != drive->select && present == 0) { 402 if (drive->dn & 1) { 403 /* exit with drive0 selected */ 404 SELECT_DRIVE(hwif->devices[0]); 405 /* allow ATA_BUSY to assert & clear */ 406 msleep(50); 407 } 408 /* no i/f present: mmm.. this should be a 4 -ml */ 409 return 3; 410 } 411 412 stat = tp_ops->read_status(hwif); 413 414 if (OK_STAT(stat, ATA_DRDY, ATA_BUSY) || 415 present || cmd == ATA_CMD_ID_ATAPI) { 416 /* send cmd and wait */ 417 if ((rc = try_to_identify(drive, cmd))) { 418 /* failed: try again */ 419 rc = try_to_identify(drive,cmd); 420 } 421 422 stat = tp_ops->read_status(hwif); 423 424 if (stat == (ATA_BUSY | ATA_DRDY)) 425 return 4; 426 427 if (rc == 1 && cmd == ATA_CMD_ID_ATAPI) { 428 printk(KERN_ERR "%s: no response (status = 0x%02x), " 429 "resetting drive\n", drive->name, stat); 430 msleep(50); 431 SELECT_DRIVE(drive); 432 msleep(50); 433 tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET); 434 (void)ide_busy_sleep(hwif, WAIT_WORSTCASE, 0); 435 rc = try_to_identify(drive, cmd); 436 } 437 438 /* ensure drive IRQ is clear */ 439 stat = tp_ops->read_status(hwif); 440 441 if (rc == 1) 442 printk(KERN_ERR "%s: no response (status = 0x%02x)\n", 443 drive->name, stat); 444 } else { 445 /* not present or maybe ATAPI */ 446 rc = 3; 447 } 448 if (drive->dn & 1) { 449 /* exit with drive0 selected */ 450 SELECT_DRIVE(hwif->devices[0]); 451 msleep(50); 452 /* ensure drive irq is clear */ 453 (void)tp_ops->read_status(hwif); 454 } 455 return rc; 456} 457 458/** 459 * probe_for_drives - upper level drive probe 460 * @drive: drive to probe for 461 * 462 * probe_for_drive() tests for existence of a given drive using do_probe() 463 * and presents things to the user as needed. 464 * 465 * Returns: 0 no device was found 466 * 1 device was found 467 * (note: IDE_DFLAG_PRESENT might still be not set) 468 */ 469 470static u8 probe_for_drive(ide_drive_t *drive) 471{ 472 char *m; 473 int rc; 474 u8 cmd; 475 476 /* 477 * In order to keep things simple we have an id 478 * block for all drives at all times. If the device 479 * is pre ATA or refuses ATA/ATAPI identify we 480 * will add faked data to this. 481 * 482 * Also note that 0 everywhere means "can't do X" 483 */ 484 485 drive->dev_flags &= ~IDE_DFLAG_ID_READ; 486 487 drive->id = kzalloc(SECTOR_SIZE, GFP_KERNEL); 488 if (drive->id == NULL) { 489 printk(KERN_ERR "ide: out of memory for id data.\n"); 490 return 0; 491 } 492 493 m = (char *)&drive->id[ATA_ID_PROD]; 494 strcpy(m, "UNKNOWN"); 495 496 /* skip probing? */ 497 if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0) { 498 /* if !(success||timed-out) */ 499 cmd = ATA_CMD_ID_ATA; 500 rc = do_probe(drive, cmd); 501 if (rc >= 2) { 502 /* look for ATAPI device */ 503 cmd = ATA_CMD_ID_ATAPI; 504 rc = do_probe(drive, cmd); 505 } 506 507 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) 508 /* drive not found */ 509 return 0; 510 511 /* identification failed? */ 512 if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) { 513 if (drive->media == ide_disk) { 514 printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n", 515 drive->name, drive->cyl, 516 drive->head, drive->sect); 517 } else if (drive->media == ide_cdrom) { 518 printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name); 519 } else { 520 /* nuke it */ 521 printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name); 522 drive->dev_flags &= ~IDE_DFLAG_PRESENT; 523 } 524 } else { 525 if (cmd == ATA_CMD_ID_ATAPI) 526 ide_classify_atapi_dev(drive); 527 else 528 ide_classify_ata_dev(drive); 529 } 530 } 531 532 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) 533 return 0; 534 535 /* The drive wasn't being helpful. Add generic info only */ 536 if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) { 537 generic_id(drive); 538 return 1; 539 } 540 541 if (drive->media == ide_disk) { 542 ide_disk_init_chs(drive); 543 ide_disk_init_mult_count(drive); 544 } 545 546 return !!(drive->dev_flags & IDE_DFLAG_PRESENT); 547} 548 549static void hwif_release_dev(struct device *dev) 550{ 551 ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev); 552 553 complete(&hwif->gendev_rel_comp); 554} 555 556static int ide_register_port(ide_hwif_t *hwif) 557{ 558 int ret; 559 560 /* register with global device tree */ 561 dev_set_name(&hwif->gendev, hwif->name); 562 hwif->gendev.driver_data = hwif; 563 if (hwif->gendev.parent == NULL) 564 hwif->gendev.parent = hwif->dev; 565 hwif->gendev.release = hwif_release_dev; 566 567 ret = device_register(&hwif->gendev); 568 if (ret < 0) { 569 printk(KERN_WARNING "IDE: %s: device_register error: %d\n", 570 __func__, ret); 571 goto out; 572 } 573 574 hwif->portdev = device_create(ide_port_class, &hwif->gendev, 575 MKDEV(0, 0), hwif, hwif->name); 576 if (IS_ERR(hwif->portdev)) { 577 ret = PTR_ERR(hwif->portdev); 578 device_unregister(&hwif->gendev); 579 } 580out: 581 return ret; 582} 583 584/** 585 * ide_port_wait_ready - wait for port to become ready 586 * @hwif: IDE port 587 * 588 * This is needed on some PPCs and a bunch of BIOS-less embedded 589 * platforms. Typical cases are: 590 * 591 * - The firmware hard reset the disk before booting the kernel, 592 * the drive is still doing it's poweron-reset sequence, that 593 * can take up to 30 seconds. 594 * 595 * - The firmware does nothing (or no firmware), the device is 596 * still in POST state (same as above actually). 597 * 598 * - Some CD/DVD/Writer combo drives tend to drive the bus during 599 * their reset sequence even when they are non-selected slave 600 * devices, thus preventing discovery of the main HD. 601 * 602 * Doing this wait-for-non-busy should not harm any existing 603 * configuration and fix some issues like the above. 604 * 605 * BenH. 606 * 607 * Returns 0 on success, error code (< 0) otherwise. 608 */ 609 610static int ide_port_wait_ready(ide_hwif_t *hwif) 611{ 612 ide_drive_t *drive; 613 int i, rc; 614 615 printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name); 616 617 /* Let HW settle down a bit from whatever init state we 618 * come from */ 619 mdelay(2); 620 621 /* Wait for BSY bit to go away, spec timeout is 30 seconds, 622 * I know of at least one disk who takes 31 seconds, I use 35 623 * here to be safe 624 */ 625 rc = ide_wait_not_busy(hwif, 35000); 626 if (rc) 627 return rc; 628 629 /* Now make sure both master & slave are ready */ 630 ide_port_for_each_dev(i, drive, hwif) { 631 /* Ignore disks that we will not probe for later. */ 632 if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0 || 633 (drive->dev_flags & IDE_DFLAG_PRESENT)) { 634 SELECT_DRIVE(drive); 635 hwif->tp_ops->set_irq(hwif, 1); 636 mdelay(2); 637 rc = ide_wait_not_busy(hwif, 35000); 638 if (rc) 639 goto out; 640 } else 641 printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n", 642 drive->name); 643 } 644out: 645 /* Exit function with master reselected (let's be sane) */ 646 if (i) 647 SELECT_DRIVE(hwif->devices[0]); 648 649 return rc; 650} 651 652/** 653 * ide_undecoded_slave - look for bad CF adapters 654 * @dev1: slave device 655 * 656 * Analyse the drives on the interface and attempt to decide if we 657 * have the same drive viewed twice. This occurs with crap CF adapters 658 * and PCMCIA sometimes. 659 */ 660 661void ide_undecoded_slave(ide_drive_t *dev1) 662{ 663 ide_drive_t *dev0 = dev1->hwif->devices[0]; 664 665 if ((dev1->dn & 1) == 0 || (dev0->dev_flags & IDE_DFLAG_PRESENT) == 0) 666 return; 667 668 /* If the models don't match they are not the same product */ 669 if (strcmp((char *)&dev0->id[ATA_ID_PROD], 670 (char *)&dev1->id[ATA_ID_PROD])) 671 return; 672 673 /* Serial numbers do not match */ 674 if (strncmp((char *)&dev0->id[ATA_ID_SERNO], 675 (char *)&dev1->id[ATA_ID_SERNO], ATA_ID_SERNO_LEN)) 676 return; 677 678 /* No serial number, thankfully very rare for CF */ 679 if (*(char *)&dev0->id[ATA_ID_SERNO] == 0) 680 return; 681 682 /* Appears to be an IDE flash adapter with decode bugs */ 683 printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n"); 684 685 dev1->dev_flags &= ~IDE_DFLAG_PRESENT; 686} 687 688EXPORT_SYMBOL_GPL(ide_undecoded_slave); 689 690static int ide_probe_port(ide_hwif_t *hwif) 691{ 692 ide_drive_t *drive; 693 unsigned int irqd; 694 int i, rc = -ENODEV; 695 696 BUG_ON(hwif->present); 697 698 if ((hwif->devices[0]->dev_flags & IDE_DFLAG_NOPROBE) && 699 (hwif->devices[1]->dev_flags & IDE_DFLAG_NOPROBE)) 700 return -EACCES; 701 702 /* 703 * We must always disable IRQ, as probe_for_drive will assert IRQ, but 704 * we'll install our IRQ driver much later... 705 */ 706 irqd = hwif->irq; 707 if (irqd) 708 disable_irq(hwif->irq); 709 710 if (ide_port_wait_ready(hwif) == -EBUSY) 711 printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name); 712 713 /* 714 * Second drive should only exist if first drive was found, 715 * but a lot of cdrom drives are configured as single slaves. 716 */ 717 ide_port_for_each_dev(i, drive, hwif) { 718 (void) probe_for_drive(drive); 719 if (drive->dev_flags & IDE_DFLAG_PRESENT) 720 rc = 0; 721 } 722 723 /* 724 * Use cached IRQ number. It might be (and is...) changed by probe 725 * code above 726 */ 727 if (irqd) 728 enable_irq(irqd); 729 730 return rc; 731} 732 733static void ide_port_tune_devices(ide_hwif_t *hwif) 734{ 735 const struct ide_port_ops *port_ops = hwif->port_ops; 736 ide_drive_t *drive; 737 int i; 738 739 ide_port_for_each_present_dev(i, drive, hwif) { 740 if (port_ops && port_ops->quirkproc) 741 port_ops->quirkproc(drive); 742 } 743 744 ide_port_for_each_present_dev(i, drive, hwif) { 745 ide_set_max_pio(drive); 746 747 drive->dev_flags |= IDE_DFLAG_NICE1; 748 749 if (hwif->dma_ops) 750 ide_set_dma(drive); 751 } 752} 753 754/* 755 * init request queue 756 */ 757static int ide_init_queue(ide_drive_t *drive) 758{ 759 struct request_queue *q; 760 ide_hwif_t *hwif = drive->hwif; 761 int max_sectors = 256; 762 int max_sg_entries = PRD_ENTRIES; 763 764 /* 765 * Our default set up assumes the normal IDE case, 766 * that is 64K segmenting, standard PRD setup 767 * and LBA28. Some drivers then impose their own 768 * limits and LBA48 we could raise it but as yet 769 * do not. 770 */ 771 772 q = blk_init_queue_node(do_ide_request, NULL, hwif_to_node(hwif)); 773 if (!q) 774 return 1; 775 776 q->queuedata = drive; 777 blk_queue_segment_boundary(q, 0xffff); 778 779 if (hwif->rqsize < max_sectors) 780 max_sectors = hwif->rqsize; 781 blk_queue_max_sectors(q, max_sectors); 782 783#ifdef CONFIG_PCI 784 /* When we have an IOMMU, we may have a problem where pci_map_sg() 785 * creates segments that don't completely match our boundary 786 * requirements and thus need to be broken up again. Because it 787 * doesn't align properly either, we may actually have to break up 788 * to more segments than what was we got in the first place, a max 789 * worst case is twice as many. 790 * This will be fixed once we teach pci_map_sg() about our boundary 791 * requirements, hopefully soon. *FIXME* 792 */ 793 if (!PCI_DMA_BUS_IS_PHYS) 794 max_sg_entries >>= 1; 795#endif /* CONFIG_PCI */ 796 797 blk_queue_max_hw_segments(q, max_sg_entries); 798 blk_queue_max_phys_segments(q, max_sg_entries); 799 800 /* assign drive queue */ 801 drive->queue = q; 802 803 /* needs drive->queue to be set */ 804 ide_toggle_bounce(drive, 1); 805 806 return 0; 807} 808 809static DEFINE_MUTEX(ide_cfg_mtx); 810 811/* 812 * For any present drive: 813 * - allocate the block device queue 814 */ 815static int ide_port_setup_devices(ide_hwif_t *hwif) 816{ 817 ide_drive_t *drive; 818 int i, j = 0; 819 820 mutex_lock(&ide_cfg_mtx); 821 ide_port_for_each_present_dev(i, drive, hwif) { 822 if (ide_init_queue(drive)) { 823 printk(KERN_ERR "ide: failed to init %s\n", 824 drive->name); 825 kfree(drive->id); 826 drive->id = NULL; 827 drive->dev_flags &= ~IDE_DFLAG_PRESENT; 828 continue; 829 } 830 831 j++; 832 } 833 mutex_unlock(&ide_cfg_mtx); 834 835 return j; 836} 837 838/* 839 * This routine sets up the IRQ for an IDE interface. 840 */ 841static int init_irq (ide_hwif_t *hwif) 842{ 843 struct ide_io_ports *io_ports = &hwif->io_ports; 844 irq_handler_t irq_handler; 845 int sa = 0; 846 847 irq_handler = hwif->host->irq_handler; 848 if (irq_handler == NULL) 849 irq_handler = ide_intr; 850 851#if defined(__mc68000__) 852 sa = IRQF_SHARED; 853#endif /* __mc68000__ */ 854 855 if (hwif->chipset == ide_pci) 856 sa = IRQF_SHARED; 857 858 if (io_ports->ctl_addr) 859 hwif->tp_ops->set_irq(hwif, 1); 860 861 if (request_irq(hwif->irq, irq_handler, sa, hwif->name, hwif)) 862 goto out_up; 863 864 if (!hwif->rqsize) { 865 if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) || 866 (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA)) 867 hwif->rqsize = 256; 868 else 869 hwif->rqsize = 65536; 870 } 871 872#if !defined(__mc68000__) 873 printk(KERN_INFO "%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name, 874 io_ports->data_addr, io_ports->status_addr, 875 io_ports->ctl_addr, hwif->irq); 876#else 877 printk(KERN_INFO "%s at 0x%08lx on irq %d", hwif->name, 878 io_ports->data_addr, hwif->irq); 879#endif /* __mc68000__ */ 880 if (hwif->host->host_flags & IDE_HFLAG_SERIALIZE) 881 printk(KERN_CONT " (serialized)"); 882 printk(KERN_CONT "\n"); 883 884 return 0; 885out_up: 886 return 1; 887} 888 889static int ata_lock(dev_t dev, void *data) 890{ 891 /* FIXME: we want to pin hwif down */ 892 return 0; 893} 894 895static struct kobject *ata_probe(dev_t dev, int *part, void *data) 896{ 897 ide_hwif_t *hwif = data; 898 int unit = *part >> PARTN_BITS; 899 ide_drive_t *drive = hwif->devices[unit]; 900 901 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) 902 return NULL; 903 904 if (drive->media == ide_disk) 905 request_module("ide-disk"); 906 if (drive->media == ide_cdrom || drive->media == ide_optical) 907 request_module("ide-cd"); 908 if (drive->media == ide_tape) 909 request_module("ide-tape"); 910 if (drive->media == ide_floppy) 911 request_module("ide-floppy"); 912 913 return NULL; 914} 915 916static struct kobject *exact_match(dev_t dev, int *part, void *data) 917{ 918 struct gendisk *p = data; 919 *part &= (1 << PARTN_BITS) - 1; 920 return &disk_to_dev(p)->kobj; 921} 922 923static int exact_lock(dev_t dev, void *data) 924{ 925 struct gendisk *p = data; 926 927 if (!get_disk(p)) 928 return -1; 929 return 0; 930} 931 932void ide_register_region(struct gendisk *disk) 933{ 934 blk_register_region(MKDEV(disk->major, disk->first_minor), 935 disk->minors, NULL, exact_match, exact_lock, disk); 936} 937 938EXPORT_SYMBOL_GPL(ide_register_region); 939 940void ide_unregister_region(struct gendisk *disk) 941{ 942 blk_unregister_region(MKDEV(disk->major, disk->first_minor), 943 disk->minors); 944} 945 946EXPORT_SYMBOL_GPL(ide_unregister_region); 947 948void ide_init_disk(struct gendisk *disk, ide_drive_t *drive) 949{ 950 ide_hwif_t *hwif = drive->hwif; 951 unsigned int unit = drive->dn & 1; 952 953 disk->major = hwif->major; 954 disk->first_minor = unit << PARTN_BITS; 955 sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit); 956 disk->queue = drive->queue; 957} 958 959EXPORT_SYMBOL_GPL(ide_init_disk); 960 961static void drive_release_dev (struct device *dev) 962{ 963 ide_drive_t *drive = container_of(dev, ide_drive_t, gendev); 964 ide_hwif_t *hwif = drive->hwif; 965 966 ide_proc_unregister_device(drive); 967 968 spin_lock_irq(&hwif->lock); 969 kfree(drive->id); 970 drive->id = NULL; 971 drive->dev_flags &= ~IDE_DFLAG_PRESENT; 972 /* Messed up locking ... */ 973 spin_unlock_irq(&hwif->lock); 974 blk_cleanup_queue(drive->queue); 975 spin_lock_irq(&hwif->lock); 976 drive->queue = NULL; 977 spin_unlock_irq(&hwif->lock); 978 979 complete(&drive->gendev_rel_comp); 980} 981 982static int hwif_init(ide_hwif_t *hwif) 983{ 984 if (!hwif->irq) { 985 printk(KERN_ERR "%s: disabled, no IRQ\n", hwif->name); 986 return 0; 987 } 988 989 if (register_blkdev(hwif->major, hwif->name)) 990 return 0; 991 992 if (!hwif->sg_max_nents) 993 hwif->sg_max_nents = PRD_ENTRIES; 994 995 hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents, 996 GFP_KERNEL); 997 if (!hwif->sg_table) { 998 printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name); 999 goto out; 1000 } 1001 1002 sg_init_table(hwif->sg_table, hwif->sg_max_nents); 1003 1004 if (init_irq(hwif)) { 1005 printk(KERN_ERR "%s: disabled, unable to get IRQ %d\n", 1006 hwif->name, hwif->irq); 1007 goto out; 1008 } 1009 1010 blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS, 1011 THIS_MODULE, ata_probe, ata_lock, hwif); 1012 return 1; 1013 1014out: 1015 unregister_blkdev(hwif->major, hwif->name); 1016 return 0; 1017} 1018 1019static void hwif_register_devices(ide_hwif_t *hwif) 1020{ 1021 ide_drive_t *drive; 1022 unsigned int i; 1023 1024 ide_port_for_each_present_dev(i, drive, hwif) { 1025 struct device *dev = &drive->gendev; 1026 int ret; 1027 1028 dev_set_name(dev, "%u.%u", hwif->index, i); 1029 dev->parent = &hwif->gendev; 1030 dev->bus = &ide_bus_type; 1031 dev->driver_data = drive; 1032 dev->release = drive_release_dev; 1033 1034 ret = device_register(dev); 1035 if (ret < 0) 1036 printk(KERN_WARNING "IDE: %s: device_register error: " 1037 "%d\n", __func__, ret); 1038 } 1039} 1040 1041static void ide_port_init_devices(ide_hwif_t *hwif) 1042{ 1043 const struct ide_port_ops *port_ops = hwif->port_ops; 1044 ide_drive_t *drive; 1045 int i; 1046 1047 ide_port_for_each_dev(i, drive, hwif) { 1048 drive->dn = i + hwif->channel * 2; 1049 1050 if (hwif->host_flags & IDE_HFLAG_IO_32BIT) 1051 drive->io_32bit = 1; 1052 if (hwif->host_flags & IDE_HFLAG_NO_IO_32BIT) 1053 drive->dev_flags |= IDE_DFLAG_NO_IO_32BIT; 1054 if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS) 1055 drive->dev_flags |= IDE_DFLAG_UNMASK; 1056 if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS) 1057 drive->dev_flags |= IDE_DFLAG_NO_UNMASK; 1058 1059 if (port_ops && port_ops->init_dev) 1060 port_ops->init_dev(drive); 1061 } 1062} 1063 1064static void ide_init_port(ide_hwif_t *hwif, unsigned int port, 1065 const struct ide_port_info *d) 1066{ 1067 hwif->channel = port; 1068 1069 if (d->chipset) 1070 hwif->chipset = d->chipset; 1071 1072 if (d->init_iops) 1073 d->init_iops(hwif); 1074 1075 /* ->host_flags may be set by ->init_iops (or even earlier...) */ 1076 hwif->host_flags |= d->host_flags; 1077 hwif->pio_mask = d->pio_mask; 1078 1079 if (d->tp_ops) 1080 hwif->tp_ops = d->tp_ops; 1081 1082 /* ->set_pio_mode for DTC2278 is currently limited to port 0 */ 1083 if (hwif->chipset != ide_dtc2278 || hwif->channel == 0) 1084 hwif->port_ops = d->port_ops; 1085 1086 hwif->swdma_mask = d->swdma_mask; 1087 hwif->mwdma_mask = d->mwdma_mask; 1088 hwif->ultra_mask = d->udma_mask; 1089 1090 if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) { 1091 int rc; 1092 1093 hwif->dma_ops = d->dma_ops; 1094 1095 if (d->init_dma) 1096 rc = d->init_dma(hwif, d); 1097 else 1098 rc = ide_hwif_setup_dma(hwif, d); 1099 1100 if (rc < 0) { 1101 printk(KERN_INFO "%s: DMA disabled\n", hwif->name); 1102 1103 hwif->dma_ops = NULL; 1104 hwif->dma_base = 0; 1105 hwif->swdma_mask = 0; 1106 hwif->mwdma_mask = 0; 1107 hwif->ultra_mask = 0; 1108 } 1109 } 1110 1111 if ((d->host_flags & IDE_HFLAG_SERIALIZE) || 1112 ((d->host_flags & IDE_HFLAG_SERIALIZE_DMA) && hwif->dma_base)) 1113 hwif->host->host_flags |= IDE_HFLAG_SERIALIZE; 1114 1115 if (d->max_sectors) 1116 hwif->rqsize = d->max_sectors; 1117 1118 /* call chipset specific routine for each enabled port */ 1119 if (d->init_hwif) 1120 d->init_hwif(hwif); 1121} 1122 1123static void ide_port_cable_detect(ide_hwif_t *hwif) 1124{ 1125 const struct ide_port_ops *port_ops = hwif->port_ops; 1126 1127 if (port_ops && port_ops->cable_detect && (hwif->ultra_mask & 0x78)) { 1128 if (hwif->cbl != ATA_CBL_PATA40_SHORT) 1129 hwif->cbl = port_ops->cable_detect(hwif); 1130 } 1131} 1132 1133static const u8 ide_hwif_to_major[] = 1134 { IDE0_MAJOR, IDE1_MAJOR, IDE2_MAJOR, IDE3_MAJOR, IDE4_MAJOR, 1135 IDE5_MAJOR, IDE6_MAJOR, IDE7_MAJOR, IDE8_MAJOR, IDE9_MAJOR }; 1136 1137static void ide_port_init_devices_data(ide_hwif_t *hwif) 1138{ 1139 ide_drive_t *drive; 1140 int i; 1141 1142 ide_port_for_each_dev(i, drive, hwif) { 1143 u8 j = (hwif->index * MAX_DRIVES) + i; 1144 1145 memset(drive, 0, sizeof(*drive)); 1146 1147 drive->media = ide_disk; 1148 drive->select = (i << 4) | ATA_DEVICE_OBS; 1149 drive->hwif = hwif; 1150 drive->ready_stat = ATA_DRDY; 1151 drive->bad_wstat = BAD_W_STAT; 1152 drive->special.b.recalibrate = 1; 1153 drive->special.b.set_geometry = 1; 1154 drive->name[0] = 'h'; 1155 drive->name[1] = 'd'; 1156 drive->name[2] = 'a' + j; 1157 drive->max_failures = IDE_DEFAULT_MAX_FAILURES; 1158 1159 INIT_LIST_HEAD(&drive->list); 1160 init_completion(&drive->gendev_rel_comp); 1161 } 1162} 1163 1164static void ide_init_port_data(ide_hwif_t *hwif, unsigned int index) 1165{ 1166 /* fill in any non-zero initial values */ 1167 hwif->index = index; 1168 hwif->major = ide_hwif_to_major[index]; 1169 1170 hwif->name[0] = 'i'; 1171 hwif->name[1] = 'd'; 1172 hwif->name[2] = 'e'; 1173 hwif->name[3] = '0' + index; 1174 1175 spin_lock_init(&hwif->lock); 1176 1177 init_timer(&hwif->timer); 1178 hwif->timer.function = &ide_timer_expiry; 1179 hwif->timer.data = (unsigned long)hwif; 1180 1181 init_completion(&hwif->gendev_rel_comp); 1182 1183 hwif->tp_ops = &default_tp_ops; 1184 1185 ide_port_init_devices_data(hwif); 1186} 1187 1188static void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw) 1189{ 1190 memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports)); 1191 hwif->irq = hw->irq; 1192 hwif->chipset = hw->chipset; 1193 hwif->dev = hw->dev; 1194 hwif->gendev.parent = hw->parent ? hw->parent : hw->dev; 1195 hwif->ack_intr = hw->ack_intr; 1196 hwif->config_data = hw->config; 1197} 1198 1199static unsigned int ide_indexes; 1200 1201/** 1202 * ide_find_port_slot - find free port slot 1203 * @d: IDE port info 1204 * 1205 * Return the new port slot index or -ENOENT if we are out of free slots. 1206 */ 1207 1208static int ide_find_port_slot(const struct ide_port_info *d) 1209{ 1210 int idx = -ENOENT; 1211 u8 bootable = (d && (d->host_flags & IDE_HFLAG_NON_BOOTABLE)) ? 0 : 1; 1212 u8 i = (d && (d->host_flags & IDE_HFLAG_QD_2ND_PORT)) ? 1 : 0;; 1213 1214 /* 1215 * Claim an unassigned slot. 1216 * 1217 * Give preference to claiming other slots before claiming ide0/ide1, 1218 * just in case there's another interface yet-to-be-scanned 1219 * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults). 1220 * 1221 * Unless there is a bootable card that does not use the standard 1222 * ports 0x1f0/0x170 (the ide0/ide1 defaults). 1223 */ 1224 mutex_lock(&ide_cfg_mtx); 1225 if (bootable) { 1226 if ((ide_indexes | i) != (1 << MAX_HWIFS) - 1) 1227 idx = ffz(ide_indexes | i); 1228 } else { 1229 if ((ide_indexes | 3) != (1 << MAX_HWIFS) - 1) 1230 idx = ffz(ide_indexes | 3); 1231 else if ((ide_indexes & 3) != 3) 1232 idx = ffz(ide_indexes); 1233 } 1234 if (idx >= 0) 1235 ide_indexes |= (1 << idx); 1236 mutex_unlock(&ide_cfg_mtx); 1237 1238 return idx; 1239} 1240 1241static void ide_free_port_slot(int idx) 1242{ 1243 mutex_lock(&ide_cfg_mtx); 1244 ide_indexes &= ~(1 << idx); 1245 mutex_unlock(&ide_cfg_mtx); 1246} 1247 1248static void ide_port_free_devices(ide_hwif_t *hwif) 1249{ 1250 ide_drive_t *drive; 1251 int i; 1252 1253 ide_port_for_each_dev(i, drive, hwif) 1254 kfree(drive); 1255} 1256 1257static int ide_port_alloc_devices(ide_hwif_t *hwif, int node) 1258{ 1259 int i; 1260 1261 for (i = 0; i < MAX_DRIVES; i++) { 1262 ide_drive_t *drive; 1263 1264 drive = kzalloc_node(sizeof(*drive), GFP_KERNEL, node); 1265 if (drive == NULL) 1266 goto out_nomem; 1267 1268 hwif->devices[i] = drive; 1269 } 1270 return 0; 1271 1272out_nomem: 1273 ide_port_free_devices(hwif); 1274 return -ENOMEM; 1275} 1276 1277struct ide_host *ide_host_alloc(const struct ide_port_info *d, hw_regs_t **hws) 1278{ 1279 struct ide_host *host; 1280 struct device *dev = hws[0] ? hws[0]->dev : NULL; 1281 int node = dev ? dev_to_node(dev) : -1; 1282 int i; 1283 1284 host = kzalloc_node(sizeof(*host), GFP_KERNEL, node); 1285 if (host == NULL) 1286 return NULL; 1287 1288 for (i = 0; i < MAX_HOST_PORTS; i++) { 1289 ide_hwif_t *hwif; 1290 int idx; 1291 1292 if (hws[i] == NULL) 1293 continue; 1294 1295 hwif = kzalloc_node(sizeof(*hwif), GFP_KERNEL, node); 1296 if (hwif == NULL) 1297 continue; 1298 1299 if (ide_port_alloc_devices(hwif, node) < 0) { 1300 kfree(hwif); 1301 continue; 1302 } 1303 1304 idx = ide_find_port_slot(d); 1305 if (idx < 0) { 1306 printk(KERN_ERR "%s: no free slot for interface\n", 1307 d ? d->name : "ide"); 1308 kfree(hwif); 1309 continue; 1310 } 1311 1312 ide_init_port_data(hwif, idx); 1313 1314 hwif->host = host; 1315 1316 host->ports[i] = hwif; 1317 host->n_ports++; 1318 } 1319 1320 if (host->n_ports == 0) { 1321 kfree(host); 1322 return NULL; 1323 } 1324 1325 host->dev[0] = dev; 1326 1327 if (d) { 1328 host->init_chipset = d->init_chipset; 1329 host->host_flags = d->host_flags; 1330 } 1331 1332 return host; 1333} 1334EXPORT_SYMBOL_GPL(ide_host_alloc); 1335 1336static void ide_port_free(ide_hwif_t *hwif) 1337{ 1338 ide_port_free_devices(hwif); 1339 ide_free_port_slot(hwif->index); 1340 kfree(hwif); 1341} 1342 1343static void ide_disable_port(ide_hwif_t *hwif) 1344{ 1345 struct ide_host *host = hwif->host; 1346 int i; 1347 1348 printk(KERN_INFO "%s: disabling port\n", hwif->name); 1349 1350 for (i = 0; i < MAX_HOST_PORTS; i++) { 1351 if (host->ports[i] == hwif) { 1352 host->ports[i] = NULL; 1353 host->n_ports--; 1354 } 1355 } 1356 1357 ide_port_free(hwif); 1358} 1359 1360int ide_host_register(struct ide_host *host, const struct ide_port_info *d, 1361 hw_regs_t **hws) 1362{ 1363 ide_hwif_t *hwif, *mate = NULL; 1364 int i, j = 0; 1365 1366 ide_host_for_each_port(i, hwif, host) { 1367 if (hwif == NULL) { 1368 mate = NULL; 1369 continue; 1370 } 1371 1372 ide_init_port_hw(hwif, hws[i]); 1373 ide_port_apply_params(hwif); 1374 1375 if (d == NULL) { 1376 mate = NULL; 1377 } else { 1378 if ((i & 1) && mate) { 1379 hwif->mate = mate; 1380 mate->mate = hwif; 1381 } 1382 1383 mate = (i & 1) ? NULL : hwif; 1384 1385 ide_init_port(hwif, i & 1, d); 1386 ide_port_cable_detect(hwif); 1387 } 1388 1389 ide_port_init_devices(hwif); 1390 } 1391 1392 ide_host_for_each_port(i, hwif, host) { 1393 if (hwif == NULL) 1394 continue; 1395 1396 if (ide_probe_port(hwif) == 0) 1397 hwif->present = 1; 1398 1399 if (hwif->chipset != ide_4drives || !hwif->mate || 1400 !hwif->mate->present) { 1401 if (ide_register_port(hwif)) { 1402 ide_disable_port(hwif); 1403 continue; 1404 } 1405 } 1406 1407 if (hwif->present) 1408 ide_port_tune_devices(hwif); 1409 } 1410 1411 ide_host_for_each_port(i, hwif, host) { 1412 if (hwif == NULL) 1413 continue; 1414 1415 if (hwif_init(hwif) == 0) { 1416 printk(KERN_INFO "%s: failed to initialize IDE " 1417 "interface\n", hwif->name); 1418 device_unregister(&hwif->gendev); 1419 ide_disable_port(hwif); 1420 continue; 1421 } 1422 1423 if (hwif->present) 1424 if (ide_port_setup_devices(hwif) == 0) { 1425 hwif->present = 0; 1426 continue; 1427 } 1428 1429 j++; 1430 1431 ide_acpi_init_port(hwif); 1432 1433 if (hwif->present) 1434 ide_acpi_port_init_devices(hwif); 1435 } 1436 1437 ide_host_for_each_port(i, hwif, host) { 1438 if (hwif == NULL) 1439 continue; 1440 1441 if (hwif->present) 1442 hwif_register_devices(hwif); 1443 } 1444 1445 ide_host_for_each_port(i, hwif, host) { 1446 if (hwif == NULL) 1447 continue; 1448 1449 ide_sysfs_register_port(hwif); 1450 ide_proc_register_port(hwif); 1451 1452 if (hwif->present) 1453 ide_proc_port_register_devices(hwif); 1454 } 1455 1456 return j ? 0 : -1; 1457} 1458EXPORT_SYMBOL_GPL(ide_host_register); 1459 1460int ide_host_add(const struct ide_port_info *d, hw_regs_t **hws, 1461 struct ide_host **hostp) 1462{ 1463 struct ide_host *host; 1464 int rc; 1465 1466 host = ide_host_alloc(d, hws); 1467 if (host == NULL) 1468 return -ENOMEM; 1469 1470 rc = ide_host_register(host, d, hws); 1471 if (rc) { 1472 ide_host_free(host); 1473 return rc; 1474 } 1475 1476 if (hostp) 1477 *hostp = host; 1478 1479 return 0; 1480} 1481EXPORT_SYMBOL_GPL(ide_host_add); 1482 1483static void __ide_port_unregister_devices(ide_hwif_t *hwif) 1484{ 1485 ide_drive_t *drive; 1486 int i; 1487 1488 ide_port_for_each_present_dev(i, drive, hwif) { 1489 device_unregister(&drive->gendev); 1490 wait_for_completion(&drive->gendev_rel_comp); 1491 } 1492} 1493 1494void ide_port_unregister_devices(ide_hwif_t *hwif) 1495{ 1496 mutex_lock(&ide_cfg_mtx); 1497 __ide_port_unregister_devices(hwif); 1498 hwif->present = 0; 1499 ide_port_init_devices_data(hwif); 1500 mutex_unlock(&ide_cfg_mtx); 1501} 1502EXPORT_SYMBOL_GPL(ide_port_unregister_devices); 1503 1504/** 1505 * ide_unregister - free an IDE interface 1506 * @hwif: IDE interface 1507 * 1508 * Perform the final unregister of an IDE interface. 1509 * 1510 * Locking: 1511 * The caller must not hold the IDE locks. 1512 * 1513 * It is up to the caller to be sure there is no pending I/O here, 1514 * and that the interface will not be reopened (present/vanishing 1515 * locking isn't yet done BTW). 1516 */ 1517 1518static void ide_unregister(ide_hwif_t *hwif) 1519{ 1520 BUG_ON(in_interrupt()); 1521 BUG_ON(irqs_disabled()); 1522 1523 mutex_lock(&ide_cfg_mtx); 1524 1525 if (hwif->present) { 1526 __ide_port_unregister_devices(hwif); 1527 hwif->present = 0; 1528 } 1529 1530 ide_proc_unregister_port(hwif); 1531 1532 free_irq(hwif->irq, hwif); 1533 1534 device_unregister(hwif->portdev); 1535 device_unregister(&hwif->gendev); 1536 wait_for_completion(&hwif->gendev_rel_comp); 1537 1538 /* 1539 * Remove us from the kernel's knowledge 1540 */ 1541 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS); 1542 kfree(hwif->sg_table); 1543 unregister_blkdev(hwif->major, hwif->name); 1544 1545 ide_release_dma_engine(hwif); 1546 1547 mutex_unlock(&ide_cfg_mtx); 1548} 1549 1550void ide_host_free(struct ide_host *host) 1551{ 1552 ide_hwif_t *hwif; 1553 int i; 1554 1555 ide_host_for_each_port(i, hwif, host) { 1556 if (hwif) 1557 ide_port_free(hwif); 1558 } 1559 1560 kfree(host); 1561} 1562EXPORT_SYMBOL_GPL(ide_host_free); 1563 1564void ide_host_remove(struct ide_host *host) 1565{ 1566 ide_hwif_t *hwif; 1567 int i; 1568 1569 ide_host_for_each_port(i, hwif, host) { 1570 if (hwif) 1571 ide_unregister(hwif); 1572 } 1573 1574 ide_host_free(host); 1575} 1576EXPORT_SYMBOL_GPL(ide_host_remove); 1577 1578void ide_port_scan(ide_hwif_t *hwif) 1579{ 1580 ide_port_apply_params(hwif); 1581 ide_port_cable_detect(hwif); 1582 ide_port_init_devices(hwif); 1583 1584 if (ide_probe_port(hwif) < 0) 1585 return; 1586 1587 hwif->present = 1; 1588 1589 ide_port_tune_devices(hwif); 1590 ide_port_setup_devices(hwif); 1591 ide_acpi_port_init_devices(hwif); 1592 hwif_register_devices(hwif); 1593 ide_proc_port_register_devices(hwif); 1594} 1595EXPORT_SYMBOL_GPL(ide_port_scan); 1596