ide-probe.c revision dca3983059a4481e4ae97bbf0ac4b4c21429e1a5
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_flags |= IDE_SFLAG_SET_MULTMODE; 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 * @id: buffer for IDENTIFY data 185 * 186 * Called when we have issued a drive identify command to 187 * read and parse the results. This function is run with 188 * interrupts disabled. 189 */ 190 191static void do_identify(ide_drive_t *drive, u8 cmd, u16 *id) 192{ 193 ide_hwif_t *hwif = drive->hwif; 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 drive->dev_flags &= ~IDE_DFLAG_PRESENT; 232 else 233 drive->dev_flags |= IDE_DFLAG_PRESENT; 234} 235 236/** 237 * ide_dev_read_id - send ATA/ATAPI IDENTIFY command 238 * @drive: drive to identify 239 * @cmd: command to use 240 * @id: buffer for IDENTIFY data 241 * 242 * Sends an ATA(PI) IDENTIFY request to a drive and waits for a response. 243 * 244 * Returns: 0 device was identified 245 * 1 device timed-out (no response to identify request) 246 * 2 device aborted the command (refused to identify itself) 247 */ 248 249int ide_dev_read_id(ide_drive_t *drive, u8 cmd, u16 *id) 250{ 251 ide_hwif_t *hwif = drive->hwif; 252 struct ide_io_ports *io_ports = &hwif->io_ports; 253 const struct ide_tp_ops *tp_ops = hwif->tp_ops; 254 int use_altstatus = 0, rc; 255 unsigned long timeout; 256 u8 s = 0, a = 0; 257 258 /* 259 * Disable device IRQ. Otherwise we'll get spurious interrupts 260 * during the identify phase that the IRQ handler isn't expecting. 261 */ 262 if (io_ports->ctl_addr) 263 tp_ops->write_devctl(hwif, ATA_NIEN | ATA_DEVCTL_OBS); 264 265 /* take a deep breath */ 266 msleep(50); 267 268 if (io_ports->ctl_addr && 269 (hwif->host_flags & IDE_HFLAG_BROKEN_ALTSTATUS) == 0) { 270 a = tp_ops->read_altstatus(hwif); 271 s = tp_ops->read_status(hwif); 272 if ((a ^ s) & ~ATA_IDX) 273 /* ancient Seagate drives, broken interfaces */ 274 printk(KERN_INFO "%s: probing with STATUS(0x%02x) " 275 "instead of ALTSTATUS(0x%02x)\n", 276 drive->name, s, a); 277 else 278 /* use non-intrusive polling */ 279 use_altstatus = 1; 280 } 281 282 /* set features register for atapi 283 * identify command to be sure of reply 284 */ 285 if (cmd == ATA_CMD_ID_ATAPI) { 286 struct ide_taskfile tf; 287 288 memset(&tf, 0, sizeof(tf)); 289 /* disable DMA & overlap */ 290 tp_ops->tf_load(drive, &tf, IDE_VALID_FEATURE); 291 } 292 293 /* ask drive for ID */ 294 tp_ops->exec_command(hwif, cmd); 295 296 timeout = ((cmd == ATA_CMD_ID_ATA) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2; 297 298 if (ide_busy_sleep(hwif, timeout, use_altstatus)) 299 return 1; 300 301 /* wait for IRQ and ATA_DRQ */ 302 msleep(50); 303 s = tp_ops->read_status(hwif); 304 305 if (OK_STAT(s, ATA_DRQ, BAD_R_STAT)) { 306 /* drive returned ID */ 307 do_identify(drive, cmd, id); 308 /* drive responded with ID */ 309 rc = 0; 310 /* clear drive IRQ */ 311 (void)tp_ops->read_status(hwif); 312 } else { 313 /* drive refused ID */ 314 rc = 2; 315 } 316 return rc; 317} 318 319int ide_busy_sleep(ide_hwif_t *hwif, unsigned long timeout, int altstatus) 320{ 321 u8 stat; 322 323 timeout += jiffies; 324 325 do { 326 msleep(50); /* give drive a breather */ 327 stat = altstatus ? hwif->tp_ops->read_altstatus(hwif) 328 : hwif->tp_ops->read_status(hwif); 329 if ((stat & ATA_BUSY) == 0) 330 return 0; 331 } while (time_before(jiffies, timeout)); 332 333 return 1; /* drive timed-out */ 334} 335 336static u8 ide_read_device(ide_drive_t *drive) 337{ 338 struct ide_taskfile tf; 339 340 drive->hwif->tp_ops->tf_read(drive, &tf, IDE_VALID_DEVICE); 341 342 return tf.device; 343} 344 345/** 346 * do_probe - probe an IDE device 347 * @drive: drive to probe 348 * @cmd: command to use 349 * 350 * do_probe() has the difficult job of finding a drive if it exists, 351 * without getting hung up if it doesn't exist, without trampling on 352 * ethernet cards, and without leaving any IRQs dangling to haunt us later. 353 * 354 * If a drive is "known" to exist (from CMOS or kernel parameters), 355 * but does not respond right away, the probe will "hang in there" 356 * for the maximum wait time (about 30 seconds), otherwise it will 357 * exit much more quickly. 358 * 359 * Returns: 0 device was identified 360 * 1 device timed-out (no response to identify request) 361 * 2 device aborted the command (refused to identify itself) 362 * 3 bad status from device (possible for ATAPI drives) 363 * 4 probe was not attempted because failure was obvious 364 */ 365 366static int do_probe (ide_drive_t *drive, u8 cmd) 367{ 368 ide_hwif_t *hwif = drive->hwif; 369 const struct ide_tp_ops *tp_ops = hwif->tp_ops; 370 u16 *id = drive->id; 371 int rc; 372 u8 present = !!(drive->dev_flags & IDE_DFLAG_PRESENT), stat; 373 374 /* avoid waiting for inappropriate probes */ 375 if (present && drive->media != ide_disk && cmd == ATA_CMD_ID_ATA) 376 return 4; 377 378#ifdef DEBUG 379 printk(KERN_INFO "probing for %s: present=%d, media=%d, probetype=%s\n", 380 drive->name, present, drive->media, 381 (cmd == ATA_CMD_ID_ATA) ? "ATA" : "ATAPI"); 382#endif 383 384 /* needed for some systems 385 * (e.g. crw9624 as drive0 with disk as slave) 386 */ 387 msleep(50); 388 tp_ops->dev_select(drive); 389 msleep(50); 390 391 if (ide_read_device(drive) != drive->select && present == 0) { 392 if (drive->dn & 1) { 393 /* exit with drive0 selected */ 394 tp_ops->dev_select(hwif->devices[0]); 395 /* allow ATA_BUSY to assert & clear */ 396 msleep(50); 397 } 398 /* no i/f present: mmm.. this should be a 4 -ml */ 399 return 3; 400 } 401 402 stat = tp_ops->read_status(hwif); 403 404 if (OK_STAT(stat, ATA_DRDY, ATA_BUSY) || 405 present || cmd == ATA_CMD_ID_ATAPI) { 406 rc = ide_dev_read_id(drive, cmd, id); 407 if (rc) 408 /* failed: try again */ 409 rc = ide_dev_read_id(drive, cmd, id); 410 411 stat = tp_ops->read_status(hwif); 412 413 if (stat == (ATA_BUSY | ATA_DRDY)) 414 return 4; 415 416 if (rc == 1 && cmd == ATA_CMD_ID_ATAPI) { 417 printk(KERN_ERR "%s: no response (status = 0x%02x), " 418 "resetting drive\n", drive->name, stat); 419 msleep(50); 420 tp_ops->dev_select(drive); 421 msleep(50); 422 tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET); 423 (void)ide_busy_sleep(hwif, WAIT_WORSTCASE, 0); 424 rc = ide_dev_read_id(drive, cmd, id); 425 } 426 427 /* ensure drive IRQ is clear */ 428 stat = tp_ops->read_status(hwif); 429 430 if (rc == 1) 431 printk(KERN_ERR "%s: no response (status = 0x%02x)\n", 432 drive->name, stat); 433 } else { 434 /* not present or maybe ATAPI */ 435 rc = 3; 436 } 437 if (drive->dn & 1) { 438 /* exit with drive0 selected */ 439 tp_ops->dev_select(hwif->devices[0]); 440 msleep(50); 441 /* ensure drive irq is clear */ 442 (void)tp_ops->read_status(hwif); 443 } 444 return rc; 445} 446 447/** 448 * probe_for_drives - upper level drive probe 449 * @drive: drive to probe for 450 * 451 * probe_for_drive() tests for existence of a given drive using do_probe() 452 * and presents things to the user as needed. 453 * 454 * Returns: 0 no device was found 455 * 1 device was found 456 * (note: IDE_DFLAG_PRESENT might still be not set) 457 */ 458 459static u8 probe_for_drive(ide_drive_t *drive) 460{ 461 char *m; 462 int rc; 463 u8 cmd; 464 465 /* 466 * In order to keep things simple we have an id 467 * block for all drives at all times. If the device 468 * is pre ATA or refuses ATA/ATAPI identify we 469 * will add faked data to this. 470 * 471 * Also note that 0 everywhere means "can't do X" 472 */ 473 474 drive->dev_flags &= ~IDE_DFLAG_ID_READ; 475 476 drive->id = kzalloc(SECTOR_SIZE, GFP_KERNEL); 477 if (drive->id == NULL) { 478 printk(KERN_ERR "ide: out of memory for id data.\n"); 479 return 0; 480 } 481 482 m = (char *)&drive->id[ATA_ID_PROD]; 483 strcpy(m, "UNKNOWN"); 484 485 /* skip probing? */ 486 if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0) { 487 /* if !(success||timed-out) */ 488 cmd = ATA_CMD_ID_ATA; 489 rc = do_probe(drive, cmd); 490 if (rc >= 2) { 491 /* look for ATAPI device */ 492 cmd = ATA_CMD_ID_ATAPI; 493 rc = do_probe(drive, cmd); 494 } 495 496 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) 497 goto out_free; 498 499 /* identification failed? */ 500 if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) { 501 if (drive->media == ide_disk) { 502 printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n", 503 drive->name, drive->cyl, 504 drive->head, drive->sect); 505 } else if (drive->media == ide_cdrom) { 506 printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name); 507 } else { 508 /* nuke it */ 509 printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name); 510 drive->dev_flags &= ~IDE_DFLAG_PRESENT; 511 } 512 } else { 513 if (cmd == ATA_CMD_ID_ATAPI) 514 ide_classify_atapi_dev(drive); 515 else 516 ide_classify_ata_dev(drive); 517 } 518 } 519 520 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) 521 goto out_free; 522 523 /* The drive wasn't being helpful. Add generic info only */ 524 if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) { 525 generic_id(drive); 526 return 1; 527 } 528 529 if (drive->media == ide_disk) { 530 ide_disk_init_chs(drive); 531 ide_disk_init_mult_count(drive); 532 } 533 534 return 1; 535out_free: 536 kfree(drive->id); 537 return 0; 538} 539 540static void hwif_release_dev(struct device *dev) 541{ 542 ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev); 543 544 complete(&hwif->gendev_rel_comp); 545} 546 547static int ide_register_port(ide_hwif_t *hwif) 548{ 549 int ret; 550 551 /* register with global device tree */ 552 dev_set_name(&hwif->gendev, hwif->name); 553 hwif->gendev.driver_data = hwif; 554 if (hwif->gendev.parent == NULL) 555 hwif->gendev.parent = hwif->dev; 556 hwif->gendev.release = hwif_release_dev; 557 558 ret = device_register(&hwif->gendev); 559 if (ret < 0) { 560 printk(KERN_WARNING "IDE: %s: device_register error: %d\n", 561 __func__, ret); 562 goto out; 563 } 564 565 hwif->portdev = device_create(ide_port_class, &hwif->gendev, 566 MKDEV(0, 0), hwif, hwif->name); 567 if (IS_ERR(hwif->portdev)) { 568 ret = PTR_ERR(hwif->portdev); 569 device_unregister(&hwif->gendev); 570 } 571out: 572 return ret; 573} 574 575/** 576 * ide_port_wait_ready - wait for port to become ready 577 * @hwif: IDE port 578 * 579 * This is needed on some PPCs and a bunch of BIOS-less embedded 580 * platforms. Typical cases are: 581 * 582 * - The firmware hard reset the disk before booting the kernel, 583 * the drive is still doing it's poweron-reset sequence, that 584 * can take up to 30 seconds. 585 * 586 * - The firmware does nothing (or no firmware), the device is 587 * still in POST state (same as above actually). 588 * 589 * - Some CD/DVD/Writer combo drives tend to drive the bus during 590 * their reset sequence even when they are non-selected slave 591 * devices, thus preventing discovery of the main HD. 592 * 593 * Doing this wait-for-non-busy should not harm any existing 594 * configuration and fix some issues like the above. 595 * 596 * BenH. 597 * 598 * Returns 0 on success, error code (< 0) otherwise. 599 */ 600 601static int ide_port_wait_ready(ide_hwif_t *hwif) 602{ 603 const struct ide_tp_ops *tp_ops = hwif->tp_ops; 604 ide_drive_t *drive; 605 int i, rc; 606 607 printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name); 608 609 /* Let HW settle down a bit from whatever init state we 610 * come from */ 611 mdelay(2); 612 613 /* Wait for BSY bit to go away, spec timeout is 30 seconds, 614 * I know of at least one disk who takes 31 seconds, I use 35 615 * here to be safe 616 */ 617 rc = ide_wait_not_busy(hwif, 35000); 618 if (rc) 619 return rc; 620 621 /* Now make sure both master & slave are ready */ 622 ide_port_for_each_dev(i, drive, hwif) { 623 /* Ignore disks that we will not probe for later. */ 624 if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0 || 625 (drive->dev_flags & IDE_DFLAG_PRESENT)) { 626 tp_ops->dev_select(drive); 627 tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS); 628 mdelay(2); 629 rc = ide_wait_not_busy(hwif, 35000); 630 if (rc) 631 goto out; 632 } else 633 printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n", 634 drive->name); 635 } 636out: 637 /* Exit function with master reselected (let's be sane) */ 638 if (i) 639 tp_ops->dev_select(hwif->devices[0]); 640 641 return rc; 642} 643 644/** 645 * ide_undecoded_slave - look for bad CF adapters 646 * @dev1: slave device 647 * 648 * Analyse the drives on the interface and attempt to decide if we 649 * have the same drive viewed twice. This occurs with crap CF adapters 650 * and PCMCIA sometimes. 651 */ 652 653void ide_undecoded_slave(ide_drive_t *dev1) 654{ 655 ide_drive_t *dev0 = dev1->hwif->devices[0]; 656 657 if ((dev1->dn & 1) == 0 || (dev0->dev_flags & IDE_DFLAG_PRESENT) == 0) 658 return; 659 660 /* If the models don't match they are not the same product */ 661 if (strcmp((char *)&dev0->id[ATA_ID_PROD], 662 (char *)&dev1->id[ATA_ID_PROD])) 663 return; 664 665 /* Serial numbers do not match */ 666 if (strncmp((char *)&dev0->id[ATA_ID_SERNO], 667 (char *)&dev1->id[ATA_ID_SERNO], ATA_ID_SERNO_LEN)) 668 return; 669 670 /* No serial number, thankfully very rare for CF */ 671 if (*(char *)&dev0->id[ATA_ID_SERNO] == 0) 672 return; 673 674 /* Appears to be an IDE flash adapter with decode bugs */ 675 printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n"); 676 677 dev1->dev_flags &= ~IDE_DFLAG_PRESENT; 678} 679 680EXPORT_SYMBOL_GPL(ide_undecoded_slave); 681 682static int ide_probe_port(ide_hwif_t *hwif) 683{ 684 ide_drive_t *drive; 685 unsigned int irqd; 686 int i, rc = -ENODEV; 687 688 BUG_ON(hwif->present); 689 690 if ((hwif->devices[0]->dev_flags & IDE_DFLAG_NOPROBE) && 691 (hwif->devices[1]->dev_flags & IDE_DFLAG_NOPROBE)) 692 return -EACCES; 693 694 /* 695 * We must always disable IRQ, as probe_for_drive will assert IRQ, but 696 * we'll install our IRQ driver much later... 697 */ 698 irqd = hwif->irq; 699 if (irqd) 700 disable_irq(hwif->irq); 701 702 if (ide_port_wait_ready(hwif) == -EBUSY) 703 printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name); 704 705 /* 706 * Second drive should only exist if first drive was found, 707 * but a lot of cdrom drives are configured as single slaves. 708 */ 709 ide_port_for_each_dev(i, drive, hwif) { 710 (void) probe_for_drive(drive); 711 if (drive->dev_flags & IDE_DFLAG_PRESENT) 712 rc = 0; 713 } 714 715 /* 716 * Use cached IRQ number. It might be (and is...) changed by probe 717 * code above 718 */ 719 if (irqd) 720 enable_irq(irqd); 721 722 return rc; 723} 724 725static void ide_port_tune_devices(ide_hwif_t *hwif) 726{ 727 const struct ide_port_ops *port_ops = hwif->port_ops; 728 ide_drive_t *drive; 729 int i; 730 731 ide_port_for_each_present_dev(i, drive, hwif) { 732 if (port_ops && port_ops->quirkproc) 733 port_ops->quirkproc(drive); 734 } 735 736 ide_port_for_each_present_dev(i, drive, hwif) { 737 ide_set_max_pio(drive); 738 739 drive->dev_flags |= IDE_DFLAG_NICE1; 740 741 if (hwif->dma_ops) 742 ide_set_dma(drive); 743 } 744} 745 746/* 747 * init request queue 748 */ 749static int ide_init_queue(ide_drive_t *drive) 750{ 751 struct request_queue *q; 752 ide_hwif_t *hwif = drive->hwif; 753 int max_sectors = 256; 754 int max_sg_entries = PRD_ENTRIES; 755 756 /* 757 * Our default set up assumes the normal IDE case, 758 * that is 64K segmenting, standard PRD setup 759 * and LBA28. Some drivers then impose their own 760 * limits and LBA48 we could raise it but as yet 761 * do not. 762 */ 763 764 q = blk_init_queue_node(do_ide_request, NULL, hwif_to_node(hwif)); 765 if (!q) 766 return 1; 767 768 q->queuedata = drive; 769 blk_queue_segment_boundary(q, 0xffff); 770 771 if (hwif->rqsize < max_sectors) 772 max_sectors = hwif->rqsize; 773 blk_queue_max_sectors(q, max_sectors); 774 775#ifdef CONFIG_PCI 776 /* When we have an IOMMU, we may have a problem where pci_map_sg() 777 * creates segments that don't completely match our boundary 778 * requirements and thus need to be broken up again. Because it 779 * doesn't align properly either, we may actually have to break up 780 * to more segments than what was we got in the first place, a max 781 * worst case is twice as many. 782 * This will be fixed once we teach pci_map_sg() about our boundary 783 * requirements, hopefully soon. *FIXME* 784 */ 785 if (!PCI_DMA_BUS_IS_PHYS) 786 max_sg_entries >>= 1; 787#endif /* CONFIG_PCI */ 788 789 blk_queue_max_hw_segments(q, max_sg_entries); 790 blk_queue_max_phys_segments(q, max_sg_entries); 791 792 /* assign drive queue */ 793 drive->queue = q; 794 795 /* needs drive->queue to be set */ 796 ide_toggle_bounce(drive, 1); 797 798 return 0; 799} 800 801static DEFINE_MUTEX(ide_cfg_mtx); 802 803/* 804 * For any present drive: 805 * - allocate the block device queue 806 */ 807static int ide_port_setup_devices(ide_hwif_t *hwif) 808{ 809 ide_drive_t *drive; 810 int i, j = 0; 811 812 mutex_lock(&ide_cfg_mtx); 813 ide_port_for_each_present_dev(i, drive, hwif) { 814 if (ide_init_queue(drive)) { 815 printk(KERN_ERR "ide: failed to init %s\n", 816 drive->name); 817 kfree(drive->id); 818 drive->id = NULL; 819 drive->dev_flags &= ~IDE_DFLAG_PRESENT; 820 continue; 821 } 822 823 j++; 824 } 825 mutex_unlock(&ide_cfg_mtx); 826 827 return j; 828} 829 830/* 831 * This routine sets up the IRQ for an IDE interface. 832 */ 833static int init_irq (ide_hwif_t *hwif) 834{ 835 struct ide_io_ports *io_ports = &hwif->io_ports; 836 struct ide_host *host = hwif->host; 837 irq_handler_t irq_handler = host->irq_handler; 838 int sa = host->irq_flags; 839 840 if (irq_handler == NULL) 841 irq_handler = ide_intr; 842 843 if (io_ports->ctl_addr) 844 hwif->tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS); 845 846 if (request_irq(hwif->irq, irq_handler, sa, hwif->name, hwif)) 847 goto out_up; 848 849#if !defined(__mc68000__) 850 printk(KERN_INFO "%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name, 851 io_ports->data_addr, io_ports->status_addr, 852 io_ports->ctl_addr, hwif->irq); 853#else 854 printk(KERN_INFO "%s at 0x%08lx on irq %d", hwif->name, 855 io_ports->data_addr, hwif->irq); 856#endif /* __mc68000__ */ 857 if (hwif->host->host_flags & IDE_HFLAG_SERIALIZE) 858 printk(KERN_CONT " (serialized)"); 859 printk(KERN_CONT "\n"); 860 861 return 0; 862out_up: 863 return 1; 864} 865 866static int ata_lock(dev_t dev, void *data) 867{ 868 /* FIXME: we want to pin hwif down */ 869 return 0; 870} 871 872static struct kobject *ata_probe(dev_t dev, int *part, void *data) 873{ 874 ide_hwif_t *hwif = data; 875 int unit = *part >> PARTN_BITS; 876 ide_drive_t *drive = hwif->devices[unit]; 877 878 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) 879 return NULL; 880 881 if (drive->media == ide_disk) 882 request_module("ide-disk"); 883 if (drive->media == ide_cdrom || drive->media == ide_optical) 884 request_module("ide-cd"); 885 if (drive->media == ide_tape) 886 request_module("ide-tape"); 887 if (drive->media == ide_floppy) 888 request_module("ide-floppy"); 889 890 return NULL; 891} 892 893static struct kobject *exact_match(dev_t dev, int *part, void *data) 894{ 895 struct gendisk *p = data; 896 *part &= (1 << PARTN_BITS) - 1; 897 return &disk_to_dev(p)->kobj; 898} 899 900static int exact_lock(dev_t dev, void *data) 901{ 902 struct gendisk *p = data; 903 904 if (!get_disk(p)) 905 return -1; 906 return 0; 907} 908 909void ide_register_region(struct gendisk *disk) 910{ 911 blk_register_region(MKDEV(disk->major, disk->first_minor), 912 disk->minors, NULL, exact_match, exact_lock, disk); 913} 914 915EXPORT_SYMBOL_GPL(ide_register_region); 916 917void ide_unregister_region(struct gendisk *disk) 918{ 919 blk_unregister_region(MKDEV(disk->major, disk->first_minor), 920 disk->minors); 921} 922 923EXPORT_SYMBOL_GPL(ide_unregister_region); 924 925void ide_init_disk(struct gendisk *disk, ide_drive_t *drive) 926{ 927 ide_hwif_t *hwif = drive->hwif; 928 unsigned int unit = drive->dn & 1; 929 930 disk->major = hwif->major; 931 disk->first_minor = unit << PARTN_BITS; 932 sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit); 933 disk->queue = drive->queue; 934} 935 936EXPORT_SYMBOL_GPL(ide_init_disk); 937 938static void drive_release_dev (struct device *dev) 939{ 940 ide_drive_t *drive = container_of(dev, ide_drive_t, gendev); 941 942 ide_proc_unregister_device(drive); 943 944 blk_cleanup_queue(drive->queue); 945 drive->queue = NULL; 946 947 kfree(drive->id); 948 drive->id = NULL; 949 950 drive->dev_flags &= ~IDE_DFLAG_PRESENT; 951 952 complete(&drive->gendev_rel_comp); 953} 954 955static int hwif_init(ide_hwif_t *hwif) 956{ 957 if (!hwif->irq) { 958 printk(KERN_ERR "%s: disabled, no IRQ\n", hwif->name); 959 return 0; 960 } 961 962 if (register_blkdev(hwif->major, hwif->name)) 963 return 0; 964 965 if (!hwif->sg_max_nents) 966 hwif->sg_max_nents = PRD_ENTRIES; 967 968 hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents, 969 GFP_KERNEL); 970 if (!hwif->sg_table) { 971 printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name); 972 goto out; 973 } 974 975 sg_init_table(hwif->sg_table, hwif->sg_max_nents); 976 977 if (init_irq(hwif)) { 978 printk(KERN_ERR "%s: disabled, unable to get IRQ %d\n", 979 hwif->name, hwif->irq); 980 goto out; 981 } 982 983 blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS, 984 THIS_MODULE, ata_probe, ata_lock, hwif); 985 return 1; 986 987out: 988 unregister_blkdev(hwif->major, hwif->name); 989 return 0; 990} 991 992static void hwif_register_devices(ide_hwif_t *hwif) 993{ 994 ide_drive_t *drive; 995 unsigned int i; 996 997 ide_port_for_each_present_dev(i, drive, hwif) { 998 struct device *dev = &drive->gendev; 999 int ret; 1000 1001 dev_set_name(dev, "%u.%u", hwif->index, i); 1002 dev->parent = &hwif->gendev; 1003 dev->bus = &ide_bus_type; 1004 dev->driver_data = drive; 1005 dev->release = drive_release_dev; 1006 1007 ret = device_register(dev); 1008 if (ret < 0) 1009 printk(KERN_WARNING "IDE: %s: device_register error: " 1010 "%d\n", __func__, ret); 1011 } 1012} 1013 1014static void ide_port_init_devices(ide_hwif_t *hwif) 1015{ 1016 const struct ide_port_ops *port_ops = hwif->port_ops; 1017 ide_drive_t *drive; 1018 int i; 1019 1020 ide_port_for_each_dev(i, drive, hwif) { 1021 drive->dn = i + hwif->channel * 2; 1022 1023 if (hwif->host_flags & IDE_HFLAG_IO_32BIT) 1024 drive->io_32bit = 1; 1025 if (hwif->host_flags & IDE_HFLAG_NO_IO_32BIT) 1026 drive->dev_flags |= IDE_DFLAG_NO_IO_32BIT; 1027 if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS) 1028 drive->dev_flags |= IDE_DFLAG_UNMASK; 1029 if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS) 1030 drive->dev_flags |= IDE_DFLAG_NO_UNMASK; 1031 1032 if (port_ops && port_ops->init_dev) 1033 port_ops->init_dev(drive); 1034 } 1035 1036 ide_port_for_each_dev(i, drive, hwif) { 1037 /* 1038 * default to PIO Mode 0 before we figure out 1039 * the most suited mode for the attached device 1040 */ 1041 if (port_ops && port_ops->set_pio_mode) 1042 port_ops->set_pio_mode(drive, 0); 1043 } 1044} 1045 1046static void ide_init_port(ide_hwif_t *hwif, unsigned int port, 1047 const struct ide_port_info *d) 1048{ 1049 hwif->channel = port; 1050 1051 hwif->chipset = d->chipset ? d->chipset : ide_pci; 1052 1053 if (d->init_iops) 1054 d->init_iops(hwif); 1055 1056 /* ->host_flags may be set by ->init_iops (or even earlier...) */ 1057 hwif->host_flags |= d->host_flags; 1058 hwif->pio_mask = d->pio_mask; 1059 1060 if (d->tp_ops) 1061 hwif->tp_ops = d->tp_ops; 1062 1063 /* ->set_pio_mode for DTC2278 is currently limited to port 0 */ 1064 if ((hwif->host_flags & IDE_HFLAG_DTC2278) == 0 || hwif->channel == 0) 1065 hwif->port_ops = d->port_ops; 1066 1067 hwif->swdma_mask = d->swdma_mask; 1068 hwif->mwdma_mask = d->mwdma_mask; 1069 hwif->ultra_mask = d->udma_mask; 1070 1071 if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) { 1072 int rc; 1073 1074 hwif->dma_ops = d->dma_ops; 1075 1076 if (d->init_dma) 1077 rc = d->init_dma(hwif, d); 1078 else 1079 rc = ide_hwif_setup_dma(hwif, d); 1080 1081 if (rc < 0) { 1082 printk(KERN_INFO "%s: DMA disabled\n", hwif->name); 1083 1084 hwif->dma_ops = NULL; 1085 hwif->dma_base = 0; 1086 hwif->swdma_mask = 0; 1087 hwif->mwdma_mask = 0; 1088 hwif->ultra_mask = 0; 1089 } 1090 } 1091 1092 if ((d->host_flags & IDE_HFLAG_SERIALIZE) || 1093 ((d->host_flags & IDE_HFLAG_SERIALIZE_DMA) && hwif->dma_base)) 1094 hwif->host->host_flags |= IDE_HFLAG_SERIALIZE; 1095 1096 if (d->max_sectors) 1097 hwif->rqsize = d->max_sectors; 1098 else { 1099 if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) || 1100 (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA)) 1101 hwif->rqsize = 256; 1102 else 1103 hwif->rqsize = 65536; 1104 } 1105 1106 /* call chipset specific routine for each enabled port */ 1107 if (d->init_hwif) 1108 d->init_hwif(hwif); 1109} 1110 1111static void ide_port_cable_detect(ide_hwif_t *hwif) 1112{ 1113 const struct ide_port_ops *port_ops = hwif->port_ops; 1114 1115 if (port_ops && port_ops->cable_detect && (hwif->ultra_mask & 0x78)) { 1116 if (hwif->cbl != ATA_CBL_PATA40_SHORT) 1117 hwif->cbl = port_ops->cable_detect(hwif); 1118 } 1119} 1120 1121static const u8 ide_hwif_to_major[] = 1122 { IDE0_MAJOR, IDE1_MAJOR, IDE2_MAJOR, IDE3_MAJOR, IDE4_MAJOR, 1123 IDE5_MAJOR, IDE6_MAJOR, IDE7_MAJOR, IDE8_MAJOR, IDE9_MAJOR }; 1124 1125static void ide_port_init_devices_data(ide_hwif_t *hwif) 1126{ 1127 ide_drive_t *drive; 1128 int i; 1129 1130 ide_port_for_each_dev(i, drive, hwif) { 1131 u8 j = (hwif->index * MAX_DRIVES) + i; 1132 1133 memset(drive, 0, sizeof(*drive)); 1134 1135 drive->media = ide_disk; 1136 drive->select = (i << 4) | ATA_DEVICE_OBS; 1137 drive->hwif = hwif; 1138 drive->ready_stat = ATA_DRDY; 1139 drive->bad_wstat = BAD_W_STAT; 1140 drive->special_flags = IDE_SFLAG_RECALIBRATE | 1141 IDE_SFLAG_SET_GEOMETRY; 1142 drive->name[0] = 'h'; 1143 drive->name[1] = 'd'; 1144 drive->name[2] = 'a' + j; 1145 drive->max_failures = IDE_DEFAULT_MAX_FAILURES; 1146 1147 INIT_LIST_HEAD(&drive->list); 1148 init_completion(&drive->gendev_rel_comp); 1149 } 1150} 1151 1152static void ide_init_port_data(ide_hwif_t *hwif, unsigned int index) 1153{ 1154 /* fill in any non-zero initial values */ 1155 hwif->index = index; 1156 hwif->major = ide_hwif_to_major[index]; 1157 1158 hwif->name[0] = 'i'; 1159 hwif->name[1] = 'd'; 1160 hwif->name[2] = 'e'; 1161 hwif->name[3] = '0' + index; 1162 1163 spin_lock_init(&hwif->lock); 1164 1165 init_timer(&hwif->timer); 1166 hwif->timer.function = &ide_timer_expiry; 1167 hwif->timer.data = (unsigned long)hwif; 1168 1169 init_completion(&hwif->gendev_rel_comp); 1170 1171 hwif->tp_ops = &default_tp_ops; 1172 1173 ide_port_init_devices_data(hwif); 1174} 1175 1176static void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw) 1177{ 1178 memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports)); 1179 hwif->irq = hw->irq; 1180 hwif->dev = hw->dev; 1181 hwif->gendev.parent = hw->parent ? hw->parent : hw->dev; 1182 hwif->ack_intr = hw->ack_intr; 1183 hwif->config_data = hw->config; 1184} 1185 1186static unsigned int ide_indexes; 1187 1188/** 1189 * ide_find_port_slot - find free port slot 1190 * @d: IDE port info 1191 * 1192 * Return the new port slot index or -ENOENT if we are out of free slots. 1193 */ 1194 1195static int ide_find_port_slot(const struct ide_port_info *d) 1196{ 1197 int idx = -ENOENT; 1198 u8 bootable = (d && (d->host_flags & IDE_HFLAG_NON_BOOTABLE)) ? 0 : 1; 1199 u8 i = (d && (d->host_flags & IDE_HFLAG_QD_2ND_PORT)) ? 1 : 0;; 1200 1201 /* 1202 * Claim an unassigned slot. 1203 * 1204 * Give preference to claiming other slots before claiming ide0/ide1, 1205 * just in case there's another interface yet-to-be-scanned 1206 * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults). 1207 * 1208 * Unless there is a bootable card that does not use the standard 1209 * ports 0x1f0/0x170 (the ide0/ide1 defaults). 1210 */ 1211 mutex_lock(&ide_cfg_mtx); 1212 if (bootable) { 1213 if ((ide_indexes | i) != (1 << MAX_HWIFS) - 1) 1214 idx = ffz(ide_indexes | i); 1215 } else { 1216 if ((ide_indexes | 3) != (1 << MAX_HWIFS) - 1) 1217 idx = ffz(ide_indexes | 3); 1218 else if ((ide_indexes & 3) != 3) 1219 idx = ffz(ide_indexes); 1220 } 1221 if (idx >= 0) 1222 ide_indexes |= (1 << idx); 1223 mutex_unlock(&ide_cfg_mtx); 1224 1225 return idx; 1226} 1227 1228static void ide_free_port_slot(int idx) 1229{ 1230 mutex_lock(&ide_cfg_mtx); 1231 ide_indexes &= ~(1 << idx); 1232 mutex_unlock(&ide_cfg_mtx); 1233} 1234 1235static void ide_port_free_devices(ide_hwif_t *hwif) 1236{ 1237 ide_drive_t *drive; 1238 int i; 1239 1240 ide_port_for_each_dev(i, drive, hwif) 1241 kfree(drive); 1242} 1243 1244static int ide_port_alloc_devices(ide_hwif_t *hwif, int node) 1245{ 1246 int i; 1247 1248 for (i = 0; i < MAX_DRIVES; i++) { 1249 ide_drive_t *drive; 1250 1251 drive = kzalloc_node(sizeof(*drive), GFP_KERNEL, node); 1252 if (drive == NULL) 1253 goto out_nomem; 1254 1255 hwif->devices[i] = drive; 1256 } 1257 return 0; 1258 1259out_nomem: 1260 ide_port_free_devices(hwif); 1261 return -ENOMEM; 1262} 1263 1264struct ide_host *ide_host_alloc(const struct ide_port_info *d, hw_regs_t **hws, 1265 unsigned int n_ports) 1266{ 1267 struct ide_host *host; 1268 struct device *dev = hws[0] ? hws[0]->dev : NULL; 1269 int node = dev ? dev_to_node(dev) : -1; 1270 int i; 1271 1272 host = kzalloc_node(sizeof(*host), GFP_KERNEL, node); 1273 if (host == NULL) 1274 return NULL; 1275 1276 for (i = 0; i < n_ports; i++) { 1277 ide_hwif_t *hwif; 1278 int idx; 1279 1280 if (hws[i] == NULL) 1281 continue; 1282 1283 hwif = kzalloc_node(sizeof(*hwif), GFP_KERNEL, node); 1284 if (hwif == NULL) 1285 continue; 1286 1287 if (ide_port_alloc_devices(hwif, node) < 0) { 1288 kfree(hwif); 1289 continue; 1290 } 1291 1292 idx = ide_find_port_slot(d); 1293 if (idx < 0) { 1294 printk(KERN_ERR "%s: no free slot for interface\n", 1295 d ? d->name : "ide"); 1296 kfree(hwif); 1297 continue; 1298 } 1299 1300 ide_init_port_data(hwif, idx); 1301 1302 hwif->host = host; 1303 1304 host->ports[i] = hwif; 1305 host->n_ports++; 1306 } 1307 1308 if (host->n_ports == 0) { 1309 kfree(host); 1310 return NULL; 1311 } 1312 1313 host->dev[0] = dev; 1314 1315 if (d) { 1316 host->init_chipset = d->init_chipset; 1317 host->get_lock = d->get_lock; 1318 host->release_lock = d->release_lock; 1319 host->host_flags = d->host_flags; 1320 host->irq_flags = d->irq_flags; 1321 } 1322 1323 return host; 1324} 1325EXPORT_SYMBOL_GPL(ide_host_alloc); 1326 1327static void ide_port_free(ide_hwif_t *hwif) 1328{ 1329 ide_port_free_devices(hwif); 1330 ide_free_port_slot(hwif->index); 1331 kfree(hwif); 1332} 1333 1334static void ide_disable_port(ide_hwif_t *hwif) 1335{ 1336 struct ide_host *host = hwif->host; 1337 int i; 1338 1339 printk(KERN_INFO "%s: disabling port\n", hwif->name); 1340 1341 for (i = 0; i < MAX_HOST_PORTS; i++) { 1342 if (host->ports[i] == hwif) { 1343 host->ports[i] = NULL; 1344 host->n_ports--; 1345 } 1346 } 1347 1348 ide_port_free(hwif); 1349} 1350 1351int ide_host_register(struct ide_host *host, const struct ide_port_info *d, 1352 hw_regs_t **hws) 1353{ 1354 ide_hwif_t *hwif, *mate = NULL; 1355 int i, j = 0; 1356 1357 ide_host_for_each_port(i, hwif, host) { 1358 if (hwif == NULL) { 1359 mate = NULL; 1360 continue; 1361 } 1362 1363 ide_init_port_hw(hwif, hws[i]); 1364 ide_port_apply_params(hwif); 1365 1366 if ((i & 1) && mate) { 1367 hwif->mate = mate; 1368 mate->mate = hwif; 1369 } 1370 1371 mate = (i & 1) ? NULL : hwif; 1372 1373 ide_init_port(hwif, i & 1, d); 1374 ide_port_cable_detect(hwif); 1375 ide_port_init_devices(hwif); 1376 } 1377 1378 ide_host_for_each_port(i, hwif, host) { 1379 if (hwif == NULL) 1380 continue; 1381 1382 if (ide_probe_port(hwif) == 0) 1383 hwif->present = 1; 1384 1385 if ((hwif->host_flags & IDE_HFLAG_4DRIVES) == 0 || 1386 hwif->mate == NULL || hwif->mate->present == 0) { 1387 if (ide_register_port(hwif)) { 1388 ide_disable_port(hwif); 1389 continue; 1390 } 1391 } 1392 1393 if (hwif->present) 1394 ide_port_tune_devices(hwif); 1395 } 1396 1397 ide_host_for_each_port(i, hwif, host) { 1398 if (hwif == NULL) 1399 continue; 1400 1401 if (hwif_init(hwif) == 0) { 1402 printk(KERN_INFO "%s: failed to initialize IDE " 1403 "interface\n", hwif->name); 1404 device_unregister(&hwif->gendev); 1405 ide_disable_port(hwif); 1406 continue; 1407 } 1408 1409 if (hwif->present) 1410 if (ide_port_setup_devices(hwif) == 0) { 1411 hwif->present = 0; 1412 continue; 1413 } 1414 1415 j++; 1416 1417 ide_acpi_init_port(hwif); 1418 1419 if (hwif->present) 1420 ide_acpi_port_init_devices(hwif); 1421 } 1422 1423 ide_host_for_each_port(i, hwif, host) { 1424 if (hwif == NULL) 1425 continue; 1426 1427 if (hwif->present) 1428 hwif_register_devices(hwif); 1429 } 1430 1431 ide_host_for_each_port(i, hwif, host) { 1432 if (hwif == NULL) 1433 continue; 1434 1435 ide_sysfs_register_port(hwif); 1436 ide_proc_register_port(hwif); 1437 1438 if (hwif->present) 1439 ide_proc_port_register_devices(hwif); 1440 } 1441 1442 return j ? 0 : -1; 1443} 1444EXPORT_SYMBOL_GPL(ide_host_register); 1445 1446int ide_host_add(const struct ide_port_info *d, hw_regs_t **hws, 1447 unsigned int n_ports, struct ide_host **hostp) 1448{ 1449 struct ide_host *host; 1450 int rc; 1451 1452 host = ide_host_alloc(d, hws, n_ports); 1453 if (host == NULL) 1454 return -ENOMEM; 1455 1456 rc = ide_host_register(host, d, hws); 1457 if (rc) { 1458 ide_host_free(host); 1459 return rc; 1460 } 1461 1462 if (hostp) 1463 *hostp = host; 1464 1465 return 0; 1466} 1467EXPORT_SYMBOL_GPL(ide_host_add); 1468 1469static void __ide_port_unregister_devices(ide_hwif_t *hwif) 1470{ 1471 ide_drive_t *drive; 1472 int i; 1473 1474 ide_port_for_each_present_dev(i, drive, hwif) { 1475 device_unregister(&drive->gendev); 1476 wait_for_completion(&drive->gendev_rel_comp); 1477 } 1478} 1479 1480void ide_port_unregister_devices(ide_hwif_t *hwif) 1481{ 1482 mutex_lock(&ide_cfg_mtx); 1483 __ide_port_unregister_devices(hwif); 1484 hwif->present = 0; 1485 ide_port_init_devices_data(hwif); 1486 mutex_unlock(&ide_cfg_mtx); 1487} 1488EXPORT_SYMBOL_GPL(ide_port_unregister_devices); 1489 1490/** 1491 * ide_unregister - free an IDE interface 1492 * @hwif: IDE interface 1493 * 1494 * Perform the final unregister of an IDE interface. 1495 * 1496 * Locking: 1497 * The caller must not hold the IDE locks. 1498 * 1499 * It is up to the caller to be sure there is no pending I/O here, 1500 * and that the interface will not be reopened (present/vanishing 1501 * locking isn't yet done BTW). 1502 */ 1503 1504static void ide_unregister(ide_hwif_t *hwif) 1505{ 1506 BUG_ON(in_interrupt()); 1507 BUG_ON(irqs_disabled()); 1508 1509 mutex_lock(&ide_cfg_mtx); 1510 1511 if (hwif->present) { 1512 __ide_port_unregister_devices(hwif); 1513 hwif->present = 0; 1514 } 1515 1516 ide_proc_unregister_port(hwif); 1517 1518 free_irq(hwif->irq, hwif); 1519 1520 device_unregister(hwif->portdev); 1521 device_unregister(&hwif->gendev); 1522 wait_for_completion(&hwif->gendev_rel_comp); 1523 1524 /* 1525 * Remove us from the kernel's knowledge 1526 */ 1527 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS); 1528 kfree(hwif->sg_table); 1529 unregister_blkdev(hwif->major, hwif->name); 1530 1531 ide_release_dma_engine(hwif); 1532 1533 mutex_unlock(&ide_cfg_mtx); 1534} 1535 1536void ide_host_free(struct ide_host *host) 1537{ 1538 ide_hwif_t *hwif; 1539 int i; 1540 1541 ide_host_for_each_port(i, hwif, host) { 1542 if (hwif) 1543 ide_port_free(hwif); 1544 } 1545 1546 kfree(host); 1547} 1548EXPORT_SYMBOL_GPL(ide_host_free); 1549 1550void ide_host_remove(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_unregister(hwif); 1558 } 1559 1560 ide_host_free(host); 1561} 1562EXPORT_SYMBOL_GPL(ide_host_remove); 1563 1564void ide_port_scan(ide_hwif_t *hwif) 1565{ 1566 ide_port_apply_params(hwif); 1567 ide_port_cable_detect(hwif); 1568 ide_port_init_devices(hwif); 1569 1570 if (ide_probe_port(hwif) < 0) 1571 return; 1572 1573 hwif->present = 1; 1574 1575 ide_port_tune_devices(hwif); 1576 ide_port_setup_devices(hwif); 1577 ide_acpi_port_init_devices(hwif); 1578 hwif_register_devices(hwif); 1579 ide_proc_port_register_devices(hwif); 1580} 1581EXPORT_SYMBOL_GPL(ide_port_scan); 1582