ide-probe.c revision 2787cb8ae5c68a6945eb82ccf96b5f2c4f238323
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 * @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->set_irq(hwif, 0); 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 ide_task_t task; 287 288 memset(&task, 0, sizeof(task)); 289 /* disable DMA & overlap */ 290 task.tf_flags = IDE_TFLAG_OUT_FEATURE; 291 292 tp_ops->tf_load(drive, &task); 293 } 294 295 /* ask drive for ID */ 296 tp_ops->exec_command(hwif, cmd); 297 298 timeout = ((cmd == ATA_CMD_ID_ATA) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2; 299 300 if (ide_busy_sleep(hwif, timeout, use_altstatus)) 301 return 1; 302 303 /* wait for IRQ and ATA_DRQ */ 304 msleep(50); 305 s = tp_ops->read_status(hwif); 306 307 if (OK_STAT(s, ATA_DRQ, BAD_R_STAT)) { 308 /* drive returned ID */ 309 do_identify(drive, cmd, id); 310 /* drive responded with ID */ 311 rc = 0; 312 /* clear drive IRQ */ 313 (void)tp_ops->read_status(hwif); 314 } else { 315 /* drive refused ID */ 316 rc = 2; 317 } 318 return rc; 319} 320 321int ide_busy_sleep(ide_hwif_t *hwif, unsigned long timeout, int altstatus) 322{ 323 u8 stat; 324 325 timeout += jiffies; 326 327 do { 328 msleep(50); /* give drive a breather */ 329 stat = altstatus ? hwif->tp_ops->read_altstatus(hwif) 330 : hwif->tp_ops->read_status(hwif); 331 if ((stat & ATA_BUSY) == 0) 332 return 0; 333 } while (time_before(jiffies, timeout)); 334 335 return 1; /* drive timed-out */ 336} 337 338static u8 ide_read_device(ide_drive_t *drive) 339{ 340 ide_task_t task; 341 342 memset(&task, 0, sizeof(task)); 343 task.tf_flags = IDE_TFLAG_IN_DEVICE; 344 345 drive->hwif->tp_ops->tf_read(drive, &task); 346 347 return task.tf.device; 348} 349 350/** 351 * do_probe - probe an IDE device 352 * @drive: drive to probe 353 * @cmd: command to use 354 * 355 * do_probe() has the difficult job of finding a drive if it exists, 356 * without getting hung up if it doesn't exist, without trampling on 357 * ethernet cards, and without leaving any IRQs dangling to haunt us later. 358 * 359 * If a drive is "known" to exist (from CMOS or kernel parameters), 360 * but does not respond right away, the probe will "hang in there" 361 * for the maximum wait time (about 30 seconds), otherwise it will 362 * exit much more quickly. 363 * 364 * Returns: 0 device was identified 365 * 1 device timed-out (no response to identify request) 366 * 2 device aborted the command (refused to identify itself) 367 * 3 bad status from device (possible for ATAPI drives) 368 * 4 probe was not attempted because failure was obvious 369 */ 370 371static int do_probe (ide_drive_t *drive, u8 cmd) 372{ 373 ide_hwif_t *hwif = drive->hwif; 374 const struct ide_tp_ops *tp_ops = hwif->tp_ops; 375 u16 *id = drive->id; 376 int rc; 377 u8 present = !!(drive->dev_flags & IDE_DFLAG_PRESENT), stat; 378 379 /* avoid waiting for inappropriate probes */ 380 if (present && drive->media != ide_disk && cmd == ATA_CMD_ID_ATA) 381 return 4; 382 383#ifdef DEBUG 384 printk(KERN_INFO "probing for %s: present=%d, media=%d, probetype=%s\n", 385 drive->name, present, drive->media, 386 (cmd == ATA_CMD_ID_ATA) ? "ATA" : "ATAPI"); 387#endif 388 389 /* needed for some systems 390 * (e.g. crw9624 as drive0 with disk as slave) 391 */ 392 msleep(50); 393 SELECT_DRIVE(drive); 394 msleep(50); 395 396 if (ide_read_device(drive) != drive->select && present == 0) { 397 if (drive->dn & 1) { 398 /* exit with drive0 selected */ 399 SELECT_DRIVE(hwif->devices[0]); 400 /* allow ATA_BUSY to assert & clear */ 401 msleep(50); 402 } 403 /* no i/f present: mmm.. this should be a 4 -ml */ 404 return 3; 405 } 406 407 stat = tp_ops->read_status(hwif); 408 409 if (OK_STAT(stat, ATA_DRDY, ATA_BUSY) || 410 present || cmd == ATA_CMD_ID_ATAPI) { 411 rc = ide_dev_read_id(drive, cmd, id); 412 if (rc) 413 /* failed: try again */ 414 rc = ide_dev_read_id(drive, cmd, id); 415 416 stat = tp_ops->read_status(hwif); 417 418 if (stat == (ATA_BUSY | ATA_DRDY)) 419 return 4; 420 421 if (rc == 1 && cmd == ATA_CMD_ID_ATAPI) { 422 printk(KERN_ERR "%s: no response (status = 0x%02x), " 423 "resetting drive\n", drive->name, stat); 424 msleep(50); 425 SELECT_DRIVE(drive); 426 msleep(50); 427 tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET); 428 (void)ide_busy_sleep(hwif, WAIT_WORSTCASE, 0); 429 rc = ide_dev_read_id(drive, cmd, id); 430 } 431 432 /* ensure drive IRQ is clear */ 433 stat = tp_ops->read_status(hwif); 434 435 if (rc == 1) 436 printk(KERN_ERR "%s: no response (status = 0x%02x)\n", 437 drive->name, stat); 438 } else { 439 /* not present or maybe ATAPI */ 440 rc = 3; 441 } 442 if (drive->dn & 1) { 443 /* exit with drive0 selected */ 444 SELECT_DRIVE(hwif->devices[0]); 445 msleep(50); 446 /* ensure drive irq is clear */ 447 (void)tp_ops->read_status(hwif); 448 } 449 return rc; 450} 451 452/** 453 * probe_for_drives - upper level drive probe 454 * @drive: drive to probe for 455 * 456 * probe_for_drive() tests for existence of a given drive using do_probe() 457 * and presents things to the user as needed. 458 * 459 * Returns: 0 no device was found 460 * 1 device was found 461 * (note: IDE_DFLAG_PRESENT might still be not set) 462 */ 463 464static u8 probe_for_drive(ide_drive_t *drive) 465{ 466 char *m; 467 int rc; 468 u8 cmd; 469 470 /* 471 * In order to keep things simple we have an id 472 * block for all drives at all times. If the device 473 * is pre ATA or refuses ATA/ATAPI identify we 474 * will add faked data to this. 475 * 476 * Also note that 0 everywhere means "can't do X" 477 */ 478 479 drive->dev_flags &= ~IDE_DFLAG_ID_READ; 480 481 drive->id = kzalloc(SECTOR_SIZE, GFP_KERNEL); 482 if (drive->id == NULL) { 483 printk(KERN_ERR "ide: out of memory for id data.\n"); 484 return 0; 485 } 486 487 m = (char *)&drive->id[ATA_ID_PROD]; 488 strcpy(m, "UNKNOWN"); 489 490 /* skip probing? */ 491 if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0) { 492 /* if !(success||timed-out) */ 493 cmd = ATA_CMD_ID_ATA; 494 rc = do_probe(drive, cmd); 495 if (rc >= 2) { 496 /* look for ATAPI device */ 497 cmd = ATA_CMD_ID_ATAPI; 498 rc = do_probe(drive, cmd); 499 } 500 501 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) 502 goto out_free; 503 504 /* identification failed? */ 505 if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) { 506 if (drive->media == ide_disk) { 507 printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n", 508 drive->name, drive->cyl, 509 drive->head, drive->sect); 510 } else if (drive->media == ide_cdrom) { 511 printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name); 512 } else { 513 /* nuke it */ 514 printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name); 515 drive->dev_flags &= ~IDE_DFLAG_PRESENT; 516 } 517 } else { 518 if (cmd == ATA_CMD_ID_ATAPI) 519 ide_classify_atapi_dev(drive); 520 else 521 ide_classify_ata_dev(drive); 522 } 523 } 524 525 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) 526 goto out_free; 527 528 /* The drive wasn't being helpful. Add generic info only */ 529 if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) { 530 generic_id(drive); 531 return 1; 532 } 533 534 if (drive->media == ide_disk) { 535 ide_disk_init_chs(drive); 536 ide_disk_init_mult_count(drive); 537 } 538 539 return 1; 540out_free: 541 kfree(drive->id); 542 return 0; 543} 544 545static void hwif_release_dev(struct device *dev) 546{ 547 ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev); 548 549 complete(&hwif->gendev_rel_comp); 550} 551 552static int ide_register_port(ide_hwif_t *hwif) 553{ 554 int ret; 555 556 /* register with global device tree */ 557 dev_set_name(&hwif->gendev, hwif->name); 558 hwif->gendev.driver_data = hwif; 559 if (hwif->gendev.parent == NULL) 560 hwif->gendev.parent = hwif->dev; 561 hwif->gendev.release = hwif_release_dev; 562 563 ret = device_register(&hwif->gendev); 564 if (ret < 0) { 565 printk(KERN_WARNING "IDE: %s: device_register error: %d\n", 566 __func__, ret); 567 goto out; 568 } 569 570 hwif->portdev = device_create(ide_port_class, &hwif->gendev, 571 MKDEV(0, 0), hwif, hwif->name); 572 if (IS_ERR(hwif->portdev)) { 573 ret = PTR_ERR(hwif->portdev); 574 device_unregister(&hwif->gendev); 575 } 576out: 577 return ret; 578} 579 580/** 581 * ide_port_wait_ready - wait for port to become ready 582 * @hwif: IDE port 583 * 584 * This is needed on some PPCs and a bunch of BIOS-less embedded 585 * platforms. Typical cases are: 586 * 587 * - The firmware hard reset the disk before booting the kernel, 588 * the drive is still doing it's poweron-reset sequence, that 589 * can take up to 30 seconds. 590 * 591 * - The firmware does nothing (or no firmware), the device is 592 * still in POST state (same as above actually). 593 * 594 * - Some CD/DVD/Writer combo drives tend to drive the bus during 595 * their reset sequence even when they are non-selected slave 596 * devices, thus preventing discovery of the main HD. 597 * 598 * Doing this wait-for-non-busy should not harm any existing 599 * configuration and fix some issues like the above. 600 * 601 * BenH. 602 * 603 * Returns 0 on success, error code (< 0) otherwise. 604 */ 605 606static int ide_port_wait_ready(ide_hwif_t *hwif) 607{ 608 ide_drive_t *drive; 609 int i, rc; 610 611 printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name); 612 613 /* Let HW settle down a bit from whatever init state we 614 * come from */ 615 mdelay(2); 616 617 /* Wait for BSY bit to go away, spec timeout is 30 seconds, 618 * I know of at least one disk who takes 31 seconds, I use 35 619 * here to be safe 620 */ 621 rc = ide_wait_not_busy(hwif, 35000); 622 if (rc) 623 return rc; 624 625 /* Now make sure both master & slave are ready */ 626 ide_port_for_each_dev(i, drive, hwif) { 627 /* Ignore disks that we will not probe for later. */ 628 if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0 || 629 (drive->dev_flags & IDE_DFLAG_PRESENT)) { 630 SELECT_DRIVE(drive); 631 hwif->tp_ops->set_irq(hwif, 1); 632 mdelay(2); 633 rc = ide_wait_not_busy(hwif, 35000); 634 if (rc) 635 goto out; 636 } else 637 printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n", 638 drive->name); 639 } 640out: 641 /* Exit function with master reselected (let's be sane) */ 642 if (i) 643 SELECT_DRIVE(hwif->devices[0]); 644 645 return rc; 646} 647 648/** 649 * ide_undecoded_slave - look for bad CF adapters 650 * @dev1: slave device 651 * 652 * Analyse the drives on the interface and attempt to decide if we 653 * have the same drive viewed twice. This occurs with crap CF adapters 654 * and PCMCIA sometimes. 655 */ 656 657void ide_undecoded_slave(ide_drive_t *dev1) 658{ 659 ide_drive_t *dev0 = dev1->hwif->devices[0]; 660 661 if ((dev1->dn & 1) == 0 || (dev0->dev_flags & IDE_DFLAG_PRESENT) == 0) 662 return; 663 664 /* If the models don't match they are not the same product */ 665 if (strcmp((char *)&dev0->id[ATA_ID_PROD], 666 (char *)&dev1->id[ATA_ID_PROD])) 667 return; 668 669 /* Serial numbers do not match */ 670 if (strncmp((char *)&dev0->id[ATA_ID_SERNO], 671 (char *)&dev1->id[ATA_ID_SERNO], ATA_ID_SERNO_LEN)) 672 return; 673 674 /* No serial number, thankfully very rare for CF */ 675 if (*(char *)&dev0->id[ATA_ID_SERNO] == 0) 676 return; 677 678 /* Appears to be an IDE flash adapter with decode bugs */ 679 printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n"); 680 681 dev1->dev_flags &= ~IDE_DFLAG_PRESENT; 682} 683 684EXPORT_SYMBOL_GPL(ide_undecoded_slave); 685 686static int ide_probe_port(ide_hwif_t *hwif) 687{ 688 ide_drive_t *drive; 689 unsigned int irqd; 690 int i, rc = -ENODEV; 691 692 BUG_ON(hwif->present); 693 694 if ((hwif->devices[0]->dev_flags & IDE_DFLAG_NOPROBE) && 695 (hwif->devices[1]->dev_flags & IDE_DFLAG_NOPROBE)) 696 return -EACCES; 697 698 /* 699 * We must always disable IRQ, as probe_for_drive will assert IRQ, but 700 * we'll install our IRQ driver much later... 701 */ 702 irqd = hwif->irq; 703 if (irqd) 704 disable_irq(hwif->irq); 705 706 if (ide_port_wait_ready(hwif) == -EBUSY) 707 printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name); 708 709 /* 710 * Second drive should only exist if first drive was found, 711 * but a lot of cdrom drives are configured as single slaves. 712 */ 713 ide_port_for_each_dev(i, drive, hwif) { 714 (void) probe_for_drive(drive); 715 if (drive->dev_flags & IDE_DFLAG_PRESENT) 716 rc = 0; 717 } 718 719 /* 720 * Use cached IRQ number. It might be (and is...) changed by probe 721 * code above 722 */ 723 if (irqd) 724 enable_irq(irqd); 725 726 return rc; 727} 728 729static void ide_port_tune_devices(ide_hwif_t *hwif) 730{ 731 const struct ide_port_ops *port_ops = hwif->port_ops; 732 ide_drive_t *drive; 733 int i; 734 735 ide_port_for_each_present_dev(i, drive, hwif) { 736 if (port_ops && port_ops->quirkproc) 737 port_ops->quirkproc(drive); 738 } 739 740 ide_port_for_each_present_dev(i, drive, hwif) { 741 ide_set_max_pio(drive); 742 743 drive->dev_flags |= IDE_DFLAG_NICE1; 744 745 if (hwif->dma_ops) 746 ide_set_dma(drive); 747 } 748} 749 750/* 751 * init request queue 752 */ 753static int ide_init_queue(ide_drive_t *drive) 754{ 755 struct request_queue *q; 756 ide_hwif_t *hwif = drive->hwif; 757 int max_sectors = 256; 758 int max_sg_entries = PRD_ENTRIES; 759 760 /* 761 * Our default set up assumes the normal IDE case, 762 * that is 64K segmenting, standard PRD setup 763 * and LBA28. Some drivers then impose their own 764 * limits and LBA48 we could raise it but as yet 765 * do not. 766 */ 767 768 q = blk_init_queue_node(do_ide_request, NULL, hwif_to_node(hwif)); 769 if (!q) 770 return 1; 771 772 q->queuedata = drive; 773 blk_queue_segment_boundary(q, 0xffff); 774 775 if (hwif->rqsize < max_sectors) 776 max_sectors = hwif->rqsize; 777 blk_queue_max_sectors(q, max_sectors); 778 779#ifdef CONFIG_PCI 780 /* When we have an IOMMU, we may have a problem where pci_map_sg() 781 * creates segments that don't completely match our boundary 782 * requirements and thus need to be broken up again. Because it 783 * doesn't align properly either, we may actually have to break up 784 * to more segments than what was we got in the first place, a max 785 * worst case is twice as many. 786 * This will be fixed once we teach pci_map_sg() about our boundary 787 * requirements, hopefully soon. *FIXME* 788 */ 789 if (!PCI_DMA_BUS_IS_PHYS) 790 max_sg_entries >>= 1; 791#endif /* CONFIG_PCI */ 792 793 blk_queue_max_hw_segments(q, max_sg_entries); 794 blk_queue_max_phys_segments(q, max_sg_entries); 795 796 /* assign drive queue */ 797 drive->queue = q; 798 799 /* needs drive->queue to be set */ 800 ide_toggle_bounce(drive, 1); 801 802 return 0; 803} 804 805static DEFINE_MUTEX(ide_cfg_mtx); 806 807/* 808 * For any present drive: 809 * - allocate the block device queue 810 */ 811static int ide_port_setup_devices(ide_hwif_t *hwif) 812{ 813 ide_drive_t *drive; 814 int i, j = 0; 815 816 mutex_lock(&ide_cfg_mtx); 817 ide_port_for_each_present_dev(i, drive, hwif) { 818 if (ide_init_queue(drive)) { 819 printk(KERN_ERR "ide: failed to init %s\n", 820 drive->name); 821 kfree(drive->id); 822 drive->id = NULL; 823 drive->dev_flags &= ~IDE_DFLAG_PRESENT; 824 continue; 825 } 826 827 j++; 828 } 829 mutex_unlock(&ide_cfg_mtx); 830 831 return j; 832} 833 834/* 835 * This routine sets up the IRQ for an IDE interface. 836 */ 837static int init_irq (ide_hwif_t *hwif) 838{ 839 struct ide_io_ports *io_ports = &hwif->io_ports; 840 struct ide_host *host = hwif->host; 841 irq_handler_t irq_handler = host->irq_handler; 842 int sa = host->irq_flags; 843 844 if (irq_handler == NULL) 845 irq_handler = ide_intr; 846 847 if (io_ports->ctl_addr) 848 hwif->tp_ops->set_irq(hwif, 1); 849 850 if (request_irq(hwif->irq, irq_handler, sa, hwif->name, hwif)) 851 goto out_up; 852 853#if !defined(__mc68000__) 854 printk(KERN_INFO "%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name, 855 io_ports->data_addr, io_ports->status_addr, 856 io_ports->ctl_addr, hwif->irq); 857#else 858 printk(KERN_INFO "%s at 0x%08lx on irq %d", hwif->name, 859 io_ports->data_addr, hwif->irq); 860#endif /* __mc68000__ */ 861 if (hwif->host->host_flags & IDE_HFLAG_SERIALIZE) 862 printk(KERN_CONT " (serialized)"); 863 printk(KERN_CONT "\n"); 864 865 return 0; 866out_up: 867 return 1; 868} 869 870static int ata_lock(dev_t dev, void *data) 871{ 872 /* FIXME: we want to pin hwif down */ 873 return 0; 874} 875 876static struct kobject *ata_probe(dev_t dev, int *part, void *data) 877{ 878 ide_hwif_t *hwif = data; 879 int unit = *part >> PARTN_BITS; 880 ide_drive_t *drive = hwif->devices[unit]; 881 882 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) 883 return NULL; 884 885 if (drive->media == ide_disk) 886 request_module("ide-disk"); 887 if (drive->media == ide_cdrom || drive->media == ide_optical) 888 request_module("ide-cd"); 889 if (drive->media == ide_tape) 890 request_module("ide-tape"); 891 if (drive->media == ide_floppy) 892 request_module("ide-floppy"); 893 894 return NULL; 895} 896 897static struct kobject *exact_match(dev_t dev, int *part, void *data) 898{ 899 struct gendisk *p = data; 900 *part &= (1 << PARTN_BITS) - 1; 901 return &disk_to_dev(p)->kobj; 902} 903 904static int exact_lock(dev_t dev, void *data) 905{ 906 struct gendisk *p = data; 907 908 if (!get_disk(p)) 909 return -1; 910 return 0; 911} 912 913void ide_register_region(struct gendisk *disk) 914{ 915 blk_register_region(MKDEV(disk->major, disk->first_minor), 916 disk->minors, NULL, exact_match, exact_lock, disk); 917} 918 919EXPORT_SYMBOL_GPL(ide_register_region); 920 921void ide_unregister_region(struct gendisk *disk) 922{ 923 blk_unregister_region(MKDEV(disk->major, disk->first_minor), 924 disk->minors); 925} 926 927EXPORT_SYMBOL_GPL(ide_unregister_region); 928 929void ide_init_disk(struct gendisk *disk, ide_drive_t *drive) 930{ 931 ide_hwif_t *hwif = drive->hwif; 932 unsigned int unit = drive->dn & 1; 933 934 disk->major = hwif->major; 935 disk->first_minor = unit << PARTN_BITS; 936 sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit); 937 disk->queue = drive->queue; 938} 939 940EXPORT_SYMBOL_GPL(ide_init_disk); 941 942static void drive_release_dev (struct device *dev) 943{ 944 ide_drive_t *drive = container_of(dev, ide_drive_t, gendev); 945 ide_hwif_t *hwif = drive->hwif; 946 947 ide_proc_unregister_device(drive); 948 949 spin_lock_irq(&hwif->lock); 950 kfree(drive->id); 951 drive->id = NULL; 952 drive->dev_flags &= ~IDE_DFLAG_PRESENT; 953 /* Messed up locking ... */ 954 spin_unlock_irq(&hwif->lock); 955 blk_cleanup_queue(drive->queue); 956 spin_lock_irq(&hwif->lock); 957 drive->queue = NULL; 958 spin_unlock_irq(&hwif->lock); 959 960 complete(&drive->gendev_rel_comp); 961} 962 963static int hwif_init(ide_hwif_t *hwif) 964{ 965 if (!hwif->irq) { 966 printk(KERN_ERR "%s: disabled, no IRQ\n", hwif->name); 967 return 0; 968 } 969 970 if (register_blkdev(hwif->major, hwif->name)) 971 return 0; 972 973 if (!hwif->sg_max_nents) 974 hwif->sg_max_nents = PRD_ENTRIES; 975 976 hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents, 977 GFP_KERNEL); 978 if (!hwif->sg_table) { 979 printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name); 980 goto out; 981 } 982 983 sg_init_table(hwif->sg_table, hwif->sg_max_nents); 984 985 if (init_irq(hwif)) { 986 printk(KERN_ERR "%s: disabled, unable to get IRQ %d\n", 987 hwif->name, hwif->irq); 988 goto out; 989 } 990 991 blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS, 992 THIS_MODULE, ata_probe, ata_lock, hwif); 993 return 1; 994 995out: 996 unregister_blkdev(hwif->major, hwif->name); 997 return 0; 998} 999 1000static void hwif_register_devices(ide_hwif_t *hwif) 1001{ 1002 ide_drive_t *drive; 1003 unsigned int i; 1004 1005 ide_port_for_each_present_dev(i, drive, hwif) { 1006 struct device *dev = &drive->gendev; 1007 int ret; 1008 1009 dev_set_name(dev, "%u.%u", hwif->index, i); 1010 dev->parent = &hwif->gendev; 1011 dev->bus = &ide_bus_type; 1012 dev->driver_data = drive; 1013 dev->release = drive_release_dev; 1014 1015 ret = device_register(dev); 1016 if (ret < 0) 1017 printk(KERN_WARNING "IDE: %s: device_register error: " 1018 "%d\n", __func__, ret); 1019 } 1020} 1021 1022static void ide_port_init_devices(ide_hwif_t *hwif) 1023{ 1024 const struct ide_port_ops *port_ops = hwif->port_ops; 1025 ide_drive_t *drive; 1026 int i; 1027 1028 ide_port_for_each_dev(i, drive, hwif) { 1029 drive->dn = i + hwif->channel * 2; 1030 1031 if (hwif->host_flags & IDE_HFLAG_IO_32BIT) 1032 drive->io_32bit = 1; 1033 if (hwif->host_flags & IDE_HFLAG_NO_IO_32BIT) 1034 drive->dev_flags |= IDE_DFLAG_NO_IO_32BIT; 1035 if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS) 1036 drive->dev_flags |= IDE_DFLAG_UNMASK; 1037 if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS) 1038 drive->dev_flags |= IDE_DFLAG_NO_UNMASK; 1039 1040 if (port_ops && port_ops->init_dev) 1041 port_ops->init_dev(drive); 1042 } 1043} 1044 1045static void ide_init_port(ide_hwif_t *hwif, unsigned int port, 1046 const struct ide_port_info *d) 1047{ 1048 hwif->channel = port; 1049 1050 if (d->chipset) 1051 hwif->chipset = d->chipset; 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.b.recalibrate = 1; 1141 drive->special.b.set_geometry = 1; 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->chipset = hw->chipset; 1181 hwif->dev = hw->dev; 1182 hwif->gendev.parent = hw->parent ? hw->parent : hw->dev; 1183 hwif->ack_intr = hw->ack_intr; 1184 hwif->config_data = hw->config; 1185} 1186 1187static unsigned int ide_indexes; 1188 1189/** 1190 * ide_find_port_slot - find free port slot 1191 * @d: IDE port info 1192 * 1193 * Return the new port slot index or -ENOENT if we are out of free slots. 1194 */ 1195 1196static int ide_find_port_slot(const struct ide_port_info *d) 1197{ 1198 int idx = -ENOENT; 1199 u8 bootable = (d && (d->host_flags & IDE_HFLAG_NON_BOOTABLE)) ? 0 : 1; 1200 u8 i = (d && (d->host_flags & IDE_HFLAG_QD_2ND_PORT)) ? 1 : 0;; 1201 1202 /* 1203 * Claim an unassigned slot. 1204 * 1205 * Give preference to claiming other slots before claiming ide0/ide1, 1206 * just in case there's another interface yet-to-be-scanned 1207 * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults). 1208 * 1209 * Unless there is a bootable card that does not use the standard 1210 * ports 0x1f0/0x170 (the ide0/ide1 defaults). 1211 */ 1212 mutex_lock(&ide_cfg_mtx); 1213 if (bootable) { 1214 if ((ide_indexes | i) != (1 << MAX_HWIFS) - 1) 1215 idx = ffz(ide_indexes | i); 1216 } else { 1217 if ((ide_indexes | 3) != (1 << MAX_HWIFS) - 1) 1218 idx = ffz(ide_indexes | 3); 1219 else if ((ide_indexes & 3) != 3) 1220 idx = ffz(ide_indexes); 1221 } 1222 if (idx >= 0) 1223 ide_indexes |= (1 << idx); 1224 mutex_unlock(&ide_cfg_mtx); 1225 1226 return idx; 1227} 1228 1229static void ide_free_port_slot(int idx) 1230{ 1231 mutex_lock(&ide_cfg_mtx); 1232 ide_indexes &= ~(1 << idx); 1233 mutex_unlock(&ide_cfg_mtx); 1234} 1235 1236static void ide_port_free_devices(ide_hwif_t *hwif) 1237{ 1238 ide_drive_t *drive; 1239 int i; 1240 1241 ide_port_for_each_dev(i, drive, hwif) 1242 kfree(drive); 1243} 1244 1245static int ide_port_alloc_devices(ide_hwif_t *hwif, int node) 1246{ 1247 int i; 1248 1249 for (i = 0; i < MAX_DRIVES; i++) { 1250 ide_drive_t *drive; 1251 1252 drive = kzalloc_node(sizeof(*drive), GFP_KERNEL, node); 1253 if (drive == NULL) 1254 goto out_nomem; 1255 1256 hwif->devices[i] = drive; 1257 } 1258 return 0; 1259 1260out_nomem: 1261 ide_port_free_devices(hwif); 1262 return -ENOMEM; 1263} 1264 1265struct ide_host *ide_host_alloc(const struct ide_port_info *d, hw_regs_t **hws) 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 < MAX_HOST_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 } 1321 1322 return host; 1323} 1324EXPORT_SYMBOL_GPL(ide_host_alloc); 1325 1326static void ide_port_free(ide_hwif_t *hwif) 1327{ 1328 ide_port_free_devices(hwif); 1329 ide_free_port_slot(hwif->index); 1330 kfree(hwif); 1331} 1332 1333static void ide_disable_port(ide_hwif_t *hwif) 1334{ 1335 struct ide_host *host = hwif->host; 1336 int i; 1337 1338 printk(KERN_INFO "%s: disabling port\n", hwif->name); 1339 1340 for (i = 0; i < MAX_HOST_PORTS; i++) { 1341 if (host->ports[i] == hwif) { 1342 host->ports[i] = NULL; 1343 host->n_ports--; 1344 } 1345 } 1346 1347 ide_port_free(hwif); 1348} 1349 1350int ide_host_register(struct ide_host *host, const struct ide_port_info *d, 1351 hw_regs_t **hws) 1352{ 1353 ide_hwif_t *hwif, *mate = NULL; 1354 int i, j = 0; 1355 1356 ide_host_for_each_port(i, hwif, host) { 1357 if (hwif == NULL) { 1358 mate = NULL; 1359 continue; 1360 } 1361 1362 ide_init_port_hw(hwif, hws[i]); 1363 ide_port_apply_params(hwif); 1364 1365 if ((i & 1) && mate) { 1366 hwif->mate = mate; 1367 mate->mate = hwif; 1368 } 1369 1370 mate = (i & 1) ? NULL : hwif; 1371 1372 ide_init_port(hwif, i & 1, d); 1373 ide_port_cable_detect(hwif); 1374 ide_port_init_devices(hwif); 1375 } 1376 1377 ide_host_for_each_port(i, hwif, host) { 1378 if (hwif == NULL) 1379 continue; 1380 1381 if (ide_probe_port(hwif) == 0) 1382 hwif->present = 1; 1383 1384 if (hwif->chipset != ide_4drives || !hwif->mate || 1385 !hwif->mate->present) { 1386 if (ide_register_port(hwif)) { 1387 ide_disable_port(hwif); 1388 continue; 1389 } 1390 } 1391 1392 if (hwif->present) 1393 ide_port_tune_devices(hwif); 1394 } 1395 1396 ide_host_for_each_port(i, hwif, host) { 1397 if (hwif == NULL) 1398 continue; 1399 1400 if (hwif_init(hwif) == 0) { 1401 printk(KERN_INFO "%s: failed to initialize IDE " 1402 "interface\n", hwif->name); 1403 device_unregister(&hwif->gendev); 1404 ide_disable_port(hwif); 1405 continue; 1406 } 1407 1408 if (hwif->present) 1409 if (ide_port_setup_devices(hwif) == 0) { 1410 hwif->present = 0; 1411 continue; 1412 } 1413 1414 j++; 1415 1416 ide_acpi_init_port(hwif); 1417 1418 if (hwif->present) 1419 ide_acpi_port_init_devices(hwif); 1420 } 1421 1422 ide_host_for_each_port(i, hwif, host) { 1423 if (hwif == NULL) 1424 continue; 1425 1426 if (hwif->present) 1427 hwif_register_devices(hwif); 1428 } 1429 1430 ide_host_for_each_port(i, hwif, host) { 1431 if (hwif == NULL) 1432 continue; 1433 1434 ide_sysfs_register_port(hwif); 1435 ide_proc_register_port(hwif); 1436 1437 if (hwif->present) 1438 ide_proc_port_register_devices(hwif); 1439 } 1440 1441 return j ? 0 : -1; 1442} 1443EXPORT_SYMBOL_GPL(ide_host_register); 1444 1445int ide_host_add(const struct ide_port_info *d, hw_regs_t **hws, 1446 struct ide_host **hostp) 1447{ 1448 struct ide_host *host; 1449 int rc; 1450 1451 host = ide_host_alloc(d, hws); 1452 if (host == NULL) 1453 return -ENOMEM; 1454 1455 rc = ide_host_register(host, d, hws); 1456 if (rc) { 1457 ide_host_free(host); 1458 return rc; 1459 } 1460 1461 if (hostp) 1462 *hostp = host; 1463 1464 return 0; 1465} 1466EXPORT_SYMBOL_GPL(ide_host_add); 1467 1468static void __ide_port_unregister_devices(ide_hwif_t *hwif) 1469{ 1470 ide_drive_t *drive; 1471 int i; 1472 1473 ide_port_for_each_present_dev(i, drive, hwif) { 1474 device_unregister(&drive->gendev); 1475 wait_for_completion(&drive->gendev_rel_comp); 1476 } 1477} 1478 1479void ide_port_unregister_devices(ide_hwif_t *hwif) 1480{ 1481 mutex_lock(&ide_cfg_mtx); 1482 __ide_port_unregister_devices(hwif); 1483 hwif->present = 0; 1484 ide_port_init_devices_data(hwif); 1485 mutex_unlock(&ide_cfg_mtx); 1486} 1487EXPORT_SYMBOL_GPL(ide_port_unregister_devices); 1488 1489/** 1490 * ide_unregister - free an IDE interface 1491 * @hwif: IDE interface 1492 * 1493 * Perform the final unregister of an IDE interface. 1494 * 1495 * Locking: 1496 * The caller must not hold the IDE locks. 1497 * 1498 * It is up to the caller to be sure there is no pending I/O here, 1499 * and that the interface will not be reopened (present/vanishing 1500 * locking isn't yet done BTW). 1501 */ 1502 1503static void ide_unregister(ide_hwif_t *hwif) 1504{ 1505 BUG_ON(in_interrupt()); 1506 BUG_ON(irqs_disabled()); 1507 1508 mutex_lock(&ide_cfg_mtx); 1509 1510 if (hwif->present) { 1511 __ide_port_unregister_devices(hwif); 1512 hwif->present = 0; 1513 } 1514 1515 ide_proc_unregister_port(hwif); 1516 1517 free_irq(hwif->irq, hwif); 1518 1519 device_unregister(hwif->portdev); 1520 device_unregister(&hwif->gendev); 1521 wait_for_completion(&hwif->gendev_rel_comp); 1522 1523 /* 1524 * Remove us from the kernel's knowledge 1525 */ 1526 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS); 1527 kfree(hwif->sg_table); 1528 unregister_blkdev(hwif->major, hwif->name); 1529 1530 ide_release_dma_engine(hwif); 1531 1532 mutex_unlock(&ide_cfg_mtx); 1533} 1534 1535void ide_host_free(struct ide_host *host) 1536{ 1537 ide_hwif_t *hwif; 1538 int i; 1539 1540 ide_host_for_each_port(i, hwif, host) { 1541 if (hwif) 1542 ide_port_free(hwif); 1543 } 1544 1545 kfree(host); 1546} 1547EXPORT_SYMBOL_GPL(ide_host_free); 1548 1549void ide_host_remove(struct ide_host *host) 1550{ 1551 ide_hwif_t *hwif; 1552 int i; 1553 1554 ide_host_for_each_port(i, hwif, host) { 1555 if (hwif) 1556 ide_unregister(hwif); 1557 } 1558 1559 ide_host_free(host); 1560} 1561EXPORT_SYMBOL_GPL(ide_host_remove); 1562 1563void ide_port_scan(ide_hwif_t *hwif) 1564{ 1565 ide_port_apply_params(hwif); 1566 ide_port_cable_detect(hwif); 1567 ide_port_init_devices(hwif); 1568 1569 if (ide_probe_port(hwif) < 0) 1570 return; 1571 1572 hwif->present = 1; 1573 1574 ide_port_tune_devices(hwif); 1575 ide_port_setup_devices(hwif); 1576 ide_acpi_port_init_devices(hwif); 1577 hwif_register_devices(hwif); 1578 ide_proc_port_register_devices(hwif); 1579} 1580EXPORT_SYMBOL_GPL(ide_port_scan); 1581