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 * @irq_ctx: flag set when called from the IRQ context 242 * 243 * Sends an ATA(PI) IDENTIFY request to a drive and waits for a response. 244 * 245 * Returns: 0 device was identified 246 * 1 device timed-out (no response to identify request) 247 * 2 device aborted the command (refused to identify itself) 248 */ 249 250int ide_dev_read_id(ide_drive_t *drive, u8 cmd, u16 *id, int irq_ctx) 251{ 252 ide_hwif_t *hwif = drive->hwif; 253 struct ide_io_ports *io_ports = &hwif->io_ports; 254 const struct ide_tp_ops *tp_ops = hwif->tp_ops; 255 int use_altstatus = 0, rc; 256 unsigned long timeout; 257 u8 s = 0, a = 0; 258 259 /* 260 * Disable device IRQ. Otherwise we'll get spurious interrupts 261 * during the identify phase that the IRQ handler isn't expecting. 262 */ 263 if (io_ports->ctl_addr) 264 tp_ops->write_devctl(hwif, ATA_NIEN | ATA_DEVCTL_OBS); 265 266 /* take a deep breath */ 267 if (irq_ctx) 268 mdelay(50); 269 else 270 msleep(50); 271 272 if (io_ports->ctl_addr && 273 (hwif->host_flags & IDE_HFLAG_BROKEN_ALTSTATUS) == 0) { 274 a = tp_ops->read_altstatus(hwif); 275 s = tp_ops->read_status(hwif); 276 if ((a ^ s) & ~ATA_IDX) 277 /* ancient Seagate drives, broken interfaces */ 278 printk(KERN_INFO "%s: probing with STATUS(0x%02x) " 279 "instead of ALTSTATUS(0x%02x)\n", 280 drive->name, s, a); 281 else 282 /* use non-intrusive polling */ 283 use_altstatus = 1; 284 } 285 286 /* set features register for atapi 287 * identify command to be sure of reply 288 */ 289 if (cmd == ATA_CMD_ID_ATAPI) { 290 struct ide_taskfile tf; 291 292 memset(&tf, 0, sizeof(tf)); 293 /* disable DMA & overlap */ 294 tp_ops->tf_load(drive, &tf, IDE_VALID_FEATURE); 295 } 296 297 /* ask drive for ID */ 298 tp_ops->exec_command(hwif, cmd); 299 300 timeout = ((cmd == ATA_CMD_ID_ATA) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2; 301 302 /* wait for IRQ and ATA_DRQ */ 303 if (irq_ctx) { 304 rc = __ide_wait_stat(drive, ATA_DRQ, BAD_R_STAT, timeout, &s); 305 if (rc) 306 return 1; 307 } else { 308 rc = ide_busy_sleep(drive, timeout, use_altstatus); 309 if (rc) 310 return 1; 311 312 msleep(50); 313 s = tp_ops->read_status(hwif); 314 } 315 316 if (OK_STAT(s, ATA_DRQ, BAD_R_STAT)) { 317 /* drive returned ID */ 318 do_identify(drive, cmd, id); 319 /* drive responded with ID */ 320 rc = 0; 321 /* clear drive IRQ */ 322 (void)tp_ops->read_status(hwif); 323 } else { 324 /* drive refused ID */ 325 rc = 2; 326 } 327 return rc; 328} 329 330int ide_busy_sleep(ide_drive_t *drive, unsigned long timeout, int altstatus) 331{ 332 ide_hwif_t *hwif = drive->hwif; 333 u8 stat; 334 335 timeout += jiffies; 336 337 do { 338 msleep(50); /* give drive a breather */ 339 stat = altstatus ? hwif->tp_ops->read_altstatus(hwif) 340 : hwif->tp_ops->read_status(hwif); 341 if ((stat & ATA_BUSY) == 0) 342 return 0; 343 } while (time_before(jiffies, timeout)); 344 345 printk(KERN_ERR "%s: timeout in %s\n", drive->name, __func__); 346 347 return 1; /* drive timed-out */ 348} 349 350static u8 ide_read_device(ide_drive_t *drive) 351{ 352 struct ide_taskfile tf; 353 354 drive->hwif->tp_ops->tf_read(drive, &tf, IDE_VALID_DEVICE); 355 356 return tf.device; 357} 358 359/** 360 * do_probe - probe an IDE device 361 * @drive: drive to probe 362 * @cmd: command to use 363 * 364 * do_probe() has the difficult job of finding a drive if it exists, 365 * without getting hung up if it doesn't exist, without trampling on 366 * ethernet cards, and without leaving any IRQs dangling to haunt us later. 367 * 368 * If a drive is "known" to exist (from CMOS or kernel parameters), 369 * but does not respond right away, the probe will "hang in there" 370 * for the maximum wait time (about 30 seconds), otherwise it will 371 * exit much more quickly. 372 * 373 * Returns: 0 device was identified 374 * 1 device timed-out (no response to identify request) 375 * 2 device aborted the command (refused to identify itself) 376 * 3 bad status from device (possible for ATAPI drives) 377 * 4 probe was not attempted because failure was obvious 378 */ 379 380static int do_probe (ide_drive_t *drive, u8 cmd) 381{ 382 ide_hwif_t *hwif = drive->hwif; 383 const struct ide_tp_ops *tp_ops = hwif->tp_ops; 384 u16 *id = drive->id; 385 int rc; 386 u8 present = !!(drive->dev_flags & IDE_DFLAG_PRESENT), stat; 387 388 /* avoid waiting for inappropriate probes */ 389 if (present && drive->media != ide_disk && cmd == ATA_CMD_ID_ATA) 390 return 4; 391 392#ifdef DEBUG 393 printk(KERN_INFO "probing for %s: present=%d, media=%d, probetype=%s\n", 394 drive->name, present, drive->media, 395 (cmd == ATA_CMD_ID_ATA) ? "ATA" : "ATAPI"); 396#endif 397 398 /* needed for some systems 399 * (e.g. crw9624 as drive0 with disk as slave) 400 */ 401 msleep(50); 402 tp_ops->dev_select(drive); 403 msleep(50); 404 405 if (ide_read_device(drive) != drive->select && present == 0) { 406 if (drive->dn & 1) { 407 /* exit with drive0 selected */ 408 tp_ops->dev_select(hwif->devices[0]); 409 /* allow ATA_BUSY to assert & clear */ 410 msleep(50); 411 } 412 /* no i/f present: mmm.. this should be a 4 -ml */ 413 return 3; 414 } 415 416 stat = tp_ops->read_status(hwif); 417 418 if (OK_STAT(stat, ATA_DRDY, ATA_BUSY) || 419 present || cmd == ATA_CMD_ID_ATAPI) { 420 rc = ide_dev_read_id(drive, cmd, id, 0); 421 if (rc) 422 /* failed: try again */ 423 rc = ide_dev_read_id(drive, cmd, id, 0); 424 425 stat = tp_ops->read_status(hwif); 426 427 if (stat == (ATA_BUSY | ATA_DRDY)) 428 return 4; 429 430 if (rc == 1 && cmd == ATA_CMD_ID_ATAPI) { 431 printk(KERN_ERR "%s: no response (status = 0x%02x), " 432 "resetting drive\n", drive->name, stat); 433 msleep(50); 434 tp_ops->dev_select(drive); 435 msleep(50); 436 tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET); 437 (void)ide_busy_sleep(drive, WAIT_WORSTCASE, 0); 438 rc = ide_dev_read_id(drive, cmd, id, 0); 439 } 440 441 /* ensure drive IRQ is clear */ 442 stat = tp_ops->read_status(hwif); 443 444 if (rc == 1) 445 printk(KERN_ERR "%s: no response (status = 0x%02x)\n", 446 drive->name, stat); 447 } else { 448 /* not present or maybe ATAPI */ 449 rc = 3; 450 } 451 if (drive->dn & 1) { 452 /* exit with drive0 selected */ 453 tp_ops->dev_select(hwif->devices[0]); 454 msleep(50); 455 /* ensure drive irq is clear */ 456 (void)tp_ops->read_status(hwif); 457 } 458 return rc; 459} 460 461/** 462 * probe_for_drives - upper level drive probe 463 * @drive: drive to probe for 464 * 465 * probe_for_drive() tests for existence of a given drive using do_probe() 466 * and presents things to the user as needed. 467 * 468 * Returns: 0 no device was found 469 * 1 device was found 470 * (note: IDE_DFLAG_PRESENT might still be not set) 471 */ 472 473static u8 probe_for_drive(ide_drive_t *drive) 474{ 475 char *m; 476 int rc; 477 u8 cmd; 478 479 drive->dev_flags &= ~IDE_DFLAG_ID_READ; 480 481 m = (char *)&drive->id[ATA_ID_PROD]; 482 strcpy(m, "UNKNOWN"); 483 484 /* skip probing? */ 485 if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0) { 486 /* if !(success||timed-out) */ 487 cmd = ATA_CMD_ID_ATA; 488 rc = do_probe(drive, cmd); 489 if (rc >= 2) { 490 /* look for ATAPI device */ 491 cmd = ATA_CMD_ID_ATAPI; 492 rc = do_probe(drive, cmd); 493 } 494 495 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) 496 return 0; 497 498 /* identification failed? */ 499 if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) { 500 if (drive->media == ide_disk) { 501 printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n", 502 drive->name, drive->cyl, 503 drive->head, drive->sect); 504 } else if (drive->media == ide_cdrom) { 505 printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name); 506 } else { 507 /* nuke it */ 508 printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name); 509 drive->dev_flags &= ~IDE_DFLAG_PRESENT; 510 } 511 } else { 512 if (cmd == ATA_CMD_ID_ATAPI) 513 ide_classify_atapi_dev(drive); 514 else 515 ide_classify_ata_dev(drive); 516 } 517 } 518 519 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) 520 return 0; 521 522 /* The drive wasn't being helpful. Add generic info only */ 523 if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) { 524 generic_id(drive); 525 return 1; 526 } 527 528 if (drive->media == ide_disk) { 529 ide_disk_init_chs(drive); 530 ide_disk_init_mult_count(drive); 531 } 532 533 return 1; 534} 535 536static void hwif_release_dev(struct device *dev) 537{ 538 ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev); 539 540 complete(&hwif->gendev_rel_comp); 541} 542 543static int ide_register_port(ide_hwif_t *hwif) 544{ 545 int ret; 546 547 /* register with global device tree */ 548 dev_set_name(&hwif->gendev, hwif->name); 549 dev_set_drvdata(&hwif->gendev, hwif); 550 if (hwif->gendev.parent == NULL) 551 hwif->gendev.parent = hwif->dev; 552 hwif->gendev.release = hwif_release_dev; 553 554 ret = device_register(&hwif->gendev); 555 if (ret < 0) { 556 printk(KERN_WARNING "IDE: %s: device_register error: %d\n", 557 __func__, ret); 558 goto out; 559 } 560 561 hwif->portdev = device_create(ide_port_class, &hwif->gendev, 562 MKDEV(0, 0), hwif, hwif->name); 563 if (IS_ERR(hwif->portdev)) { 564 ret = PTR_ERR(hwif->portdev); 565 device_unregister(&hwif->gendev); 566 } 567out: 568 return ret; 569} 570 571/** 572 * ide_port_wait_ready - wait for port to become ready 573 * @hwif: IDE port 574 * 575 * This is needed on some PPCs and a bunch of BIOS-less embedded 576 * platforms. Typical cases are: 577 * 578 * - The firmware hard reset the disk before booting the kernel, 579 * the drive is still doing it's poweron-reset sequence, that 580 * can take up to 30 seconds. 581 * 582 * - The firmware does nothing (or no firmware), the device is 583 * still in POST state (same as above actually). 584 * 585 * - Some CD/DVD/Writer combo drives tend to drive the bus during 586 * their reset sequence even when they are non-selected slave 587 * devices, thus preventing discovery of the main HD. 588 * 589 * Doing this wait-for-non-busy should not harm any existing 590 * configuration and fix some issues like the above. 591 * 592 * BenH. 593 * 594 * Returns 0 on success, error code (< 0) otherwise. 595 */ 596 597static int ide_port_wait_ready(ide_hwif_t *hwif) 598{ 599 const struct ide_tp_ops *tp_ops = hwif->tp_ops; 600 ide_drive_t *drive; 601 int i, rc; 602 603 printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name); 604 605 /* Let HW settle down a bit from whatever init state we 606 * come from */ 607 mdelay(2); 608 609 /* Wait for BSY bit to go away, spec timeout is 30 seconds, 610 * I know of at least one disk who takes 31 seconds, I use 35 611 * here to be safe 612 */ 613 rc = ide_wait_not_busy(hwif, 35000); 614 if (rc) 615 return rc; 616 617 /* Now make sure both master & slave are ready */ 618 ide_port_for_each_dev(i, drive, hwif) { 619 /* Ignore disks that we will not probe for later. */ 620 if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0 || 621 (drive->dev_flags & IDE_DFLAG_PRESENT)) { 622 tp_ops->dev_select(drive); 623 tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS); 624 mdelay(2); 625 rc = ide_wait_not_busy(hwif, 35000); 626 if (rc) 627 goto out; 628 } else 629 printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n", 630 drive->name); 631 } 632out: 633 /* Exit function with master reselected (let's be sane) */ 634 if (i) 635 tp_ops->dev_select(hwif->devices[0]); 636 637 return rc; 638} 639 640/** 641 * ide_undecoded_slave - look for bad CF adapters 642 * @dev1: slave device 643 * 644 * Analyse the drives on the interface and attempt to decide if we 645 * have the same drive viewed twice. This occurs with crap CF adapters 646 * and PCMCIA sometimes. 647 */ 648 649void ide_undecoded_slave(ide_drive_t *dev1) 650{ 651 ide_drive_t *dev0 = dev1->hwif->devices[0]; 652 653 if ((dev1->dn & 1) == 0 || (dev0->dev_flags & IDE_DFLAG_PRESENT) == 0) 654 return; 655 656 /* If the models don't match they are not the same product */ 657 if (strcmp((char *)&dev0->id[ATA_ID_PROD], 658 (char *)&dev1->id[ATA_ID_PROD])) 659 return; 660 661 /* Serial numbers do not match */ 662 if (strncmp((char *)&dev0->id[ATA_ID_SERNO], 663 (char *)&dev1->id[ATA_ID_SERNO], ATA_ID_SERNO_LEN)) 664 return; 665 666 /* No serial number, thankfully very rare for CF */ 667 if (*(char *)&dev0->id[ATA_ID_SERNO] == 0) 668 return; 669 670 /* Appears to be an IDE flash adapter with decode bugs */ 671 printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n"); 672 673 dev1->dev_flags &= ~IDE_DFLAG_PRESENT; 674} 675 676EXPORT_SYMBOL_GPL(ide_undecoded_slave); 677 678static int ide_probe_port(ide_hwif_t *hwif) 679{ 680 ide_drive_t *drive; 681 unsigned int irqd; 682 int i, rc = -ENODEV; 683 684 BUG_ON(hwif->present); 685 686 if ((hwif->devices[0]->dev_flags & IDE_DFLAG_NOPROBE) && 687 (hwif->devices[1]->dev_flags & IDE_DFLAG_NOPROBE)) 688 return -EACCES; 689 690 /* 691 * We must always disable IRQ, as probe_for_drive will assert IRQ, but 692 * we'll install our IRQ driver much later... 693 */ 694 irqd = hwif->irq; 695 if (irqd) 696 disable_irq(hwif->irq); 697 698 if (ide_port_wait_ready(hwif) == -EBUSY) 699 printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name); 700 701 /* 702 * Second drive should only exist if first drive was found, 703 * but a lot of cdrom drives are configured as single slaves. 704 */ 705 ide_port_for_each_dev(i, drive, hwif) { 706 (void) probe_for_drive(drive); 707 if (drive->dev_flags & IDE_DFLAG_PRESENT) 708 rc = 0; 709 } 710 711 /* 712 * Use cached IRQ number. It might be (and is...) changed by probe 713 * code above 714 */ 715 if (irqd) 716 enable_irq(irqd); 717 718 return rc; 719} 720 721static void ide_port_tune_devices(ide_hwif_t *hwif) 722{ 723 const struct ide_port_ops *port_ops = hwif->port_ops; 724 ide_drive_t *drive; 725 int i; 726 727 ide_port_for_each_present_dev(i, drive, hwif) { 728 ide_check_nien_quirk_list(drive); 729 730 if (port_ops && port_ops->quirkproc) 731 port_ops->quirkproc(drive); 732 } 733 734 ide_port_for_each_present_dev(i, drive, hwif) { 735 ide_set_max_pio(drive); 736 737 drive->dev_flags |= IDE_DFLAG_NICE1; 738 739 if (hwif->dma_ops) 740 ide_set_dma(drive); 741 } 742} 743 744/* 745 * init request queue 746 */ 747static int ide_init_queue(ide_drive_t *drive) 748{ 749 struct request_queue *q; 750 ide_hwif_t *hwif = drive->hwif; 751 int max_sectors = 256; 752 int max_sg_entries = PRD_ENTRIES; 753 754 /* 755 * Our default set up assumes the normal IDE case, 756 * that is 64K segmenting, standard PRD setup 757 * and LBA28. Some drivers then impose their own 758 * limits and LBA48 we could raise it but as yet 759 * do not. 760 */ 761 762 q = blk_init_queue_node(do_ide_request, NULL, hwif_to_node(hwif)); 763 if (!q) 764 return 1; 765 766 q->queuedata = drive; 767 blk_queue_segment_boundary(q, 0xffff); 768 769 if (hwif->rqsize < max_sectors) 770 max_sectors = hwif->rqsize; 771 blk_queue_max_hw_sectors(q, max_sectors); 772 773#ifdef CONFIG_PCI 774 if (!PCI_DMA_BUS_IS_PHYS) 775 max_sg_entries >>= 1; 776#endif /* CONFIG_PCI */ 777 778 blk_queue_max_segments(q, max_sg_entries); 779 780 /* assign drive queue */ 781 drive->queue = q; 782 783 /* needs drive->queue to be set */ 784 ide_toggle_bounce(drive, 1); 785 786 return 0; 787} 788 789static DEFINE_MUTEX(ide_cfg_mtx); 790 791/* 792 * For any present drive: 793 * - allocate the block device queue 794 */ 795static int ide_port_setup_devices(ide_hwif_t *hwif) 796{ 797 ide_drive_t *drive; 798 int i, j = 0; 799 800 mutex_lock(&ide_cfg_mtx); 801 ide_port_for_each_present_dev(i, drive, hwif) { 802 if (ide_init_queue(drive)) { 803 printk(KERN_ERR "ide: failed to init %s\n", 804 drive->name); 805 drive->dev_flags &= ~IDE_DFLAG_PRESENT; 806 continue; 807 } 808 809 j++; 810 } 811 mutex_unlock(&ide_cfg_mtx); 812 813 return j; 814} 815 816static void ide_host_enable_irqs(struct ide_host *host) 817{ 818 ide_hwif_t *hwif; 819 int i; 820 821 ide_host_for_each_port(i, hwif, host) { 822 if (hwif == NULL) 823 continue; 824 825 /* clear any pending IRQs */ 826 hwif->tp_ops->read_status(hwif); 827 828 /* unmask IRQs */ 829 if (hwif->io_ports.ctl_addr) 830 hwif->tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS); 831 } 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 (request_irq(hwif->irq, irq_handler, sa, hwif->name, hwif)) 848 goto out_up; 849 850#if !defined(__mc68000__) 851 printk(KERN_INFO "%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name, 852 io_ports->data_addr, io_ports->status_addr, 853 io_ports->ctl_addr, hwif->irq); 854#else 855 printk(KERN_INFO "%s at 0x%08lx on irq %d", hwif->name, 856 io_ports->data_addr, hwif->irq); 857#endif /* __mc68000__ */ 858 if (hwif->host->host_flags & IDE_HFLAG_SERIALIZE) 859 printk(KERN_CONT " (serialized)"); 860 printk(KERN_CONT "\n"); 861 862 return 0; 863out_up: 864 return 1; 865} 866 867static int ata_lock(dev_t dev, void *data) 868{ 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 drive->dev_flags &= ~IDE_DFLAG_PRESENT; 948 949 complete(&drive->gendev_rel_comp); 950} 951 952static int hwif_init(ide_hwif_t *hwif) 953{ 954 if (!hwif->irq) { 955 printk(KERN_ERR "%s: disabled, no IRQ\n", hwif->name); 956 return 0; 957 } 958 959 if (register_blkdev(hwif->major, hwif->name)) 960 return 0; 961 962 if (!hwif->sg_max_nents) 963 hwif->sg_max_nents = PRD_ENTRIES; 964 965 hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents, 966 GFP_KERNEL); 967 if (!hwif->sg_table) { 968 printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name); 969 goto out; 970 } 971 972 sg_init_table(hwif->sg_table, hwif->sg_max_nents); 973 974 if (init_irq(hwif)) { 975 printk(KERN_ERR "%s: disabled, unable to get IRQ %d\n", 976 hwif->name, hwif->irq); 977 goto out; 978 } 979 980 blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS, 981 THIS_MODULE, ata_probe, ata_lock, hwif); 982 return 1; 983 984out: 985 unregister_blkdev(hwif->major, hwif->name); 986 return 0; 987} 988 989static void hwif_register_devices(ide_hwif_t *hwif) 990{ 991 ide_drive_t *drive; 992 unsigned int i; 993 994 ide_port_for_each_present_dev(i, drive, hwif) { 995 struct device *dev = &drive->gendev; 996 int ret; 997 998 dev_set_name(dev, "%u.%u", hwif->index, i); 999 dev_set_drvdata(dev, drive); 1000 dev->parent = &hwif->gendev; 1001 dev->bus = &ide_bus_type; 1002 dev->release = drive_release_dev; 1003 1004 ret = device_register(dev); 1005 if (ret < 0) 1006 printk(KERN_WARNING "IDE: %s: device_register error: " 1007 "%d\n", __func__, ret); 1008 } 1009} 1010 1011static void ide_port_init_devices(ide_hwif_t *hwif) 1012{ 1013 const struct ide_port_ops *port_ops = hwif->port_ops; 1014 ide_drive_t *drive; 1015 int i; 1016 1017 ide_port_for_each_dev(i, drive, hwif) { 1018 drive->dn = i + hwif->channel * 2; 1019 1020 if (hwif->host_flags & IDE_HFLAG_IO_32BIT) 1021 drive->io_32bit = 1; 1022 if (hwif->host_flags & IDE_HFLAG_NO_IO_32BIT) 1023 drive->dev_flags |= IDE_DFLAG_NO_IO_32BIT; 1024 if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS) 1025 drive->dev_flags |= IDE_DFLAG_UNMASK; 1026 if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS) 1027 drive->dev_flags |= IDE_DFLAG_NO_UNMASK; 1028 1029 drive->pio_mode = XFER_PIO_0; 1030 1031 if (port_ops && port_ops->init_dev) 1032 port_ops->init_dev(drive); 1033 } 1034} 1035 1036static void ide_init_port(ide_hwif_t *hwif, unsigned int port, 1037 const struct ide_port_info *d) 1038{ 1039 hwif->channel = port; 1040 1041 hwif->chipset = d->chipset ? d->chipset : ide_pci; 1042 1043 if (d->init_iops) 1044 d->init_iops(hwif); 1045 1046 /* ->host_flags may be set by ->init_iops (or even earlier...) */ 1047 hwif->host_flags |= d->host_flags; 1048 hwif->pio_mask = d->pio_mask; 1049 1050 if (d->tp_ops) 1051 hwif->tp_ops = d->tp_ops; 1052 1053 /* ->set_pio_mode for DTC2278 is currently limited to port 0 */ 1054 if ((hwif->host_flags & IDE_HFLAG_DTC2278) == 0 || hwif->channel == 0) 1055 hwif->port_ops = d->port_ops; 1056 1057 hwif->swdma_mask = d->swdma_mask; 1058 hwif->mwdma_mask = d->mwdma_mask; 1059 hwif->ultra_mask = d->udma_mask; 1060 1061 if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) { 1062 int rc; 1063 1064 hwif->dma_ops = d->dma_ops; 1065 1066 if (d->init_dma) 1067 rc = d->init_dma(hwif, d); 1068 else 1069 rc = ide_hwif_setup_dma(hwif, d); 1070 1071 if (rc < 0) { 1072 printk(KERN_INFO "%s: DMA disabled\n", hwif->name); 1073 1074 hwif->dma_ops = NULL; 1075 hwif->dma_base = 0; 1076 hwif->swdma_mask = 0; 1077 hwif->mwdma_mask = 0; 1078 hwif->ultra_mask = 0; 1079 } 1080 } 1081 1082 if ((d->host_flags & IDE_HFLAG_SERIALIZE) || 1083 ((d->host_flags & IDE_HFLAG_SERIALIZE_DMA) && hwif->dma_base)) 1084 hwif->host->host_flags |= IDE_HFLAG_SERIALIZE; 1085 1086 if (d->max_sectors) 1087 hwif->rqsize = d->max_sectors; 1088 else { 1089 if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) || 1090 (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA)) 1091 hwif->rqsize = 256; 1092 else 1093 hwif->rqsize = 65536; 1094 } 1095 1096 /* call chipset specific routine for each enabled port */ 1097 if (d->init_hwif) 1098 d->init_hwif(hwif); 1099} 1100 1101static void ide_port_cable_detect(ide_hwif_t *hwif) 1102{ 1103 const struct ide_port_ops *port_ops = hwif->port_ops; 1104 1105 if (port_ops && port_ops->cable_detect && (hwif->ultra_mask & 0x78)) { 1106 if (hwif->cbl != ATA_CBL_PATA40_SHORT) 1107 hwif->cbl = port_ops->cable_detect(hwif); 1108 } 1109} 1110 1111static const u8 ide_hwif_to_major[] = 1112 { IDE0_MAJOR, IDE1_MAJOR, IDE2_MAJOR, IDE3_MAJOR, IDE4_MAJOR, 1113 IDE5_MAJOR, IDE6_MAJOR, IDE7_MAJOR, IDE8_MAJOR, IDE9_MAJOR }; 1114 1115static void ide_port_init_devices_data(ide_hwif_t *hwif) 1116{ 1117 ide_drive_t *drive; 1118 int i; 1119 1120 ide_port_for_each_dev(i, drive, hwif) { 1121 u8 j = (hwif->index * MAX_DRIVES) + i; 1122 u16 *saved_id = drive->id; 1123 1124 memset(drive, 0, sizeof(*drive)); 1125 memset(saved_id, 0, SECTOR_SIZE); 1126 drive->id = saved_id; 1127 1128 drive->media = ide_disk; 1129 drive->select = (i << 4) | ATA_DEVICE_OBS; 1130 drive->hwif = hwif; 1131 drive->ready_stat = ATA_DRDY; 1132 drive->bad_wstat = BAD_W_STAT; 1133 drive->special_flags = IDE_SFLAG_RECALIBRATE | 1134 IDE_SFLAG_SET_GEOMETRY; 1135 drive->name[0] = 'h'; 1136 drive->name[1] = 'd'; 1137 drive->name[2] = 'a' + j; 1138 drive->max_failures = IDE_DEFAULT_MAX_FAILURES; 1139 1140 INIT_LIST_HEAD(&drive->list); 1141 init_completion(&drive->gendev_rel_comp); 1142 } 1143} 1144 1145static void ide_init_port_data(ide_hwif_t *hwif, unsigned int index) 1146{ 1147 /* fill in any non-zero initial values */ 1148 hwif->index = index; 1149 hwif->major = ide_hwif_to_major[index]; 1150 1151 hwif->name[0] = 'i'; 1152 hwif->name[1] = 'd'; 1153 hwif->name[2] = 'e'; 1154 hwif->name[3] = '0' + index; 1155 1156 spin_lock_init(&hwif->lock); 1157 1158 init_timer(&hwif->timer); 1159 hwif->timer.function = &ide_timer_expiry; 1160 hwif->timer.data = (unsigned long)hwif; 1161 1162 init_completion(&hwif->gendev_rel_comp); 1163 1164 hwif->tp_ops = &default_tp_ops; 1165 1166 ide_port_init_devices_data(hwif); 1167} 1168 1169static void ide_init_port_hw(ide_hwif_t *hwif, struct ide_hw *hw) 1170{ 1171 memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports)); 1172 hwif->irq = hw->irq; 1173 hwif->dev = hw->dev; 1174 hwif->gendev.parent = hw->parent ? hw->parent : hw->dev; 1175 hwif->config_data = hw->config; 1176} 1177 1178static unsigned int ide_indexes; 1179 1180/** 1181 * ide_find_port_slot - find free port slot 1182 * @d: IDE port info 1183 * 1184 * Return the new port slot index or -ENOENT if we are out of free slots. 1185 */ 1186 1187static int ide_find_port_slot(const struct ide_port_info *d) 1188{ 1189 int idx = -ENOENT; 1190 u8 bootable = (d && (d->host_flags & IDE_HFLAG_NON_BOOTABLE)) ? 0 : 1; 1191 u8 i = (d && (d->host_flags & IDE_HFLAG_QD_2ND_PORT)) ? 1 : 0; 1192 1193 /* 1194 * Claim an unassigned slot. 1195 * 1196 * Give preference to claiming other slots before claiming ide0/ide1, 1197 * just in case there's another interface yet-to-be-scanned 1198 * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults). 1199 * 1200 * Unless there is a bootable card that does not use the standard 1201 * ports 0x1f0/0x170 (the ide0/ide1 defaults). 1202 */ 1203 mutex_lock(&ide_cfg_mtx); 1204 if (bootable) { 1205 if ((ide_indexes | i) != (1 << MAX_HWIFS) - 1) 1206 idx = ffz(ide_indexes | i); 1207 } else { 1208 if ((ide_indexes | 3) != (1 << MAX_HWIFS) - 1) 1209 idx = ffz(ide_indexes | 3); 1210 else if ((ide_indexes & 3) != 3) 1211 idx = ffz(ide_indexes); 1212 } 1213 if (idx >= 0) 1214 ide_indexes |= (1 << idx); 1215 mutex_unlock(&ide_cfg_mtx); 1216 1217 return idx; 1218} 1219 1220static void ide_free_port_slot(int idx) 1221{ 1222 mutex_lock(&ide_cfg_mtx); 1223 ide_indexes &= ~(1 << idx); 1224 mutex_unlock(&ide_cfg_mtx); 1225} 1226 1227static void ide_port_free_devices(ide_hwif_t *hwif) 1228{ 1229 ide_drive_t *drive; 1230 int i; 1231 1232 ide_port_for_each_dev(i, drive, hwif) { 1233 kfree(drive->id); 1234 kfree(drive); 1235 } 1236} 1237 1238static int ide_port_alloc_devices(ide_hwif_t *hwif, int node) 1239{ 1240 int i; 1241 1242 for (i = 0; i < MAX_DRIVES; i++) { 1243 ide_drive_t *drive; 1244 1245 drive = kzalloc_node(sizeof(*drive), GFP_KERNEL, node); 1246 if (drive == NULL) 1247 goto out_nomem; 1248 1249 /* 1250 * In order to keep things simple we have an id 1251 * block for all drives at all times. If the device 1252 * is pre ATA or refuses ATA/ATAPI identify we 1253 * will add faked data to this. 1254 * 1255 * Also note that 0 everywhere means "can't do X" 1256 */ 1257 drive->id = kzalloc_node(SECTOR_SIZE, GFP_KERNEL, node); 1258 if (drive->id == NULL) 1259 goto out_nomem; 1260 1261 hwif->devices[i] = drive; 1262 } 1263 return 0; 1264 1265out_nomem: 1266 ide_port_free_devices(hwif); 1267 return -ENOMEM; 1268} 1269 1270struct ide_host *ide_host_alloc(const struct ide_port_info *d, 1271 struct ide_hw **hws, unsigned int n_ports) 1272{ 1273 struct ide_host *host; 1274 struct device *dev = hws[0] ? hws[0]->dev : NULL; 1275 int node = dev ? dev_to_node(dev) : -1; 1276 int i; 1277 1278 host = kzalloc_node(sizeof(*host), GFP_KERNEL, node); 1279 if (host == NULL) 1280 return NULL; 1281 1282 for (i = 0; i < n_ports; i++) { 1283 ide_hwif_t *hwif; 1284 int idx; 1285 1286 if (hws[i] == NULL) 1287 continue; 1288 1289 hwif = kzalloc_node(sizeof(*hwif), GFP_KERNEL, node); 1290 if (hwif == NULL) 1291 continue; 1292 1293 if (ide_port_alloc_devices(hwif, node) < 0) { 1294 kfree(hwif); 1295 continue; 1296 } 1297 1298 idx = ide_find_port_slot(d); 1299 if (idx < 0) { 1300 printk(KERN_ERR "%s: no free slot for interface\n", 1301 d ? d->name : "ide"); 1302 ide_port_free_devices(hwif); 1303 kfree(hwif); 1304 continue; 1305 } 1306 1307 ide_init_port_data(hwif, idx); 1308 1309 hwif->host = host; 1310 1311 host->ports[i] = hwif; 1312 host->n_ports++; 1313 } 1314 1315 if (host->n_ports == 0) { 1316 kfree(host); 1317 return NULL; 1318 } 1319 1320 host->dev[0] = dev; 1321 1322 if (d) { 1323 host->init_chipset = d->init_chipset; 1324 host->get_lock = d->get_lock; 1325 host->release_lock = d->release_lock; 1326 host->host_flags = d->host_flags; 1327 host->irq_flags = d->irq_flags; 1328 } 1329 1330 return host; 1331} 1332EXPORT_SYMBOL_GPL(ide_host_alloc); 1333 1334static void ide_port_free(ide_hwif_t *hwif) 1335{ 1336 ide_port_free_devices(hwif); 1337 ide_free_port_slot(hwif->index); 1338 kfree(hwif); 1339} 1340 1341static void ide_disable_port(ide_hwif_t *hwif) 1342{ 1343 struct ide_host *host = hwif->host; 1344 int i; 1345 1346 printk(KERN_INFO "%s: disabling port\n", hwif->name); 1347 1348 for (i = 0; i < MAX_HOST_PORTS; i++) { 1349 if (host->ports[i] == hwif) { 1350 host->ports[i] = NULL; 1351 host->n_ports--; 1352 } 1353 } 1354 1355 ide_port_free(hwif); 1356} 1357 1358int ide_host_register(struct ide_host *host, const struct ide_port_info *d, 1359 struct ide_hw **hws) 1360{ 1361 ide_hwif_t *hwif, *mate = NULL; 1362 int i, j = 0; 1363 1364 ide_host_for_each_port(i, hwif, host) { 1365 if (hwif == NULL) { 1366 mate = NULL; 1367 continue; 1368 } 1369 1370 ide_init_port_hw(hwif, hws[i]); 1371 ide_port_apply_params(hwif); 1372 1373 if ((i & 1) && mate) { 1374 hwif->mate = mate; 1375 mate->mate = hwif; 1376 } 1377 1378 mate = (i & 1) ? NULL : hwif; 1379 1380 ide_init_port(hwif, i & 1, d); 1381 ide_port_cable_detect(hwif); 1382 1383 hwif->port_flags |= IDE_PFLAG_PROBING; 1384 1385 ide_port_init_devices(hwif); 1386 } 1387 1388 ide_host_for_each_port(i, hwif, host) { 1389 if (hwif == NULL) 1390 continue; 1391 1392 if (ide_probe_port(hwif) == 0) 1393 hwif->present = 1; 1394 1395 hwif->port_flags &= ~IDE_PFLAG_PROBING; 1396 1397 if ((hwif->host_flags & IDE_HFLAG_4DRIVES) == 0 || 1398 hwif->mate == NULL || hwif->mate->present == 0) { 1399 if (ide_register_port(hwif)) { 1400 ide_disable_port(hwif); 1401 continue; 1402 } 1403 } 1404 1405 if (hwif->present) 1406 ide_port_tune_devices(hwif); 1407 } 1408 1409 ide_host_enable_irqs(host); 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 ide_sysfs_register_port(hwif); 1442 ide_proc_register_port(hwif); 1443 1444 if (hwif->present) { 1445 ide_proc_port_register_devices(hwif); 1446 hwif_register_devices(hwif); 1447 } 1448 } 1449 1450 return j ? 0 : -1; 1451} 1452EXPORT_SYMBOL_GPL(ide_host_register); 1453 1454int ide_host_add(const struct ide_port_info *d, struct ide_hw **hws, 1455 unsigned int n_ports, struct ide_host **hostp) 1456{ 1457 struct ide_host *host; 1458 int rc; 1459 1460 host = ide_host_alloc(d, hws, n_ports); 1461 if (host == NULL) 1462 return -ENOMEM; 1463 1464 rc = ide_host_register(host, d, hws); 1465 if (rc) { 1466 ide_host_free(host); 1467 return rc; 1468 } 1469 1470 if (hostp) 1471 *hostp = host; 1472 1473 return 0; 1474} 1475EXPORT_SYMBOL_GPL(ide_host_add); 1476 1477static void __ide_port_unregister_devices(ide_hwif_t *hwif) 1478{ 1479 ide_drive_t *drive; 1480 int i; 1481 1482 ide_port_for_each_present_dev(i, drive, hwif) { 1483 device_unregister(&drive->gendev); 1484 wait_for_completion(&drive->gendev_rel_comp); 1485 } 1486} 1487 1488void ide_port_unregister_devices(ide_hwif_t *hwif) 1489{ 1490 mutex_lock(&ide_cfg_mtx); 1491 __ide_port_unregister_devices(hwif); 1492 hwif->present = 0; 1493 ide_port_init_devices_data(hwif); 1494 mutex_unlock(&ide_cfg_mtx); 1495} 1496EXPORT_SYMBOL_GPL(ide_port_unregister_devices); 1497 1498/** 1499 * ide_unregister - free an IDE interface 1500 * @hwif: IDE interface 1501 * 1502 * Perform the final unregister of an IDE interface. 1503 * 1504 * Locking: 1505 * The caller must not hold the IDE locks. 1506 * 1507 * It is up to the caller to be sure there is no pending I/O here, 1508 * and that the interface will not be reopened (present/vanishing 1509 * locking isn't yet done BTW). 1510 */ 1511 1512static void ide_unregister(ide_hwif_t *hwif) 1513{ 1514 BUG_ON(in_interrupt()); 1515 BUG_ON(irqs_disabled()); 1516 1517 mutex_lock(&ide_cfg_mtx); 1518 1519 if (hwif->present) { 1520 __ide_port_unregister_devices(hwif); 1521 hwif->present = 0; 1522 } 1523 1524 ide_proc_unregister_port(hwif); 1525 1526 free_irq(hwif->irq, hwif); 1527 1528 device_unregister(hwif->portdev); 1529 device_unregister(&hwif->gendev); 1530 wait_for_completion(&hwif->gendev_rel_comp); 1531 1532 /* 1533 * Remove us from the kernel's knowledge 1534 */ 1535 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS); 1536 kfree(hwif->sg_table); 1537 unregister_blkdev(hwif->major, hwif->name); 1538 1539 ide_release_dma_engine(hwif); 1540 1541 mutex_unlock(&ide_cfg_mtx); 1542} 1543 1544void ide_host_free(struct ide_host *host) 1545{ 1546 ide_hwif_t *hwif; 1547 int i; 1548 1549 ide_host_for_each_port(i, hwif, host) { 1550 if (hwif) 1551 ide_port_free(hwif); 1552 } 1553 1554 kfree(host); 1555} 1556EXPORT_SYMBOL_GPL(ide_host_free); 1557 1558void ide_host_remove(struct ide_host *host) 1559{ 1560 ide_hwif_t *hwif; 1561 int i; 1562 1563 ide_host_for_each_port(i, hwif, host) { 1564 if (hwif) 1565 ide_unregister(hwif); 1566 } 1567 1568 ide_host_free(host); 1569} 1570EXPORT_SYMBOL_GPL(ide_host_remove); 1571 1572void ide_port_scan(ide_hwif_t *hwif) 1573{ 1574 int rc; 1575 1576 ide_port_apply_params(hwif); 1577 ide_port_cable_detect(hwif); 1578 1579 hwif->port_flags |= IDE_PFLAG_PROBING; 1580 1581 ide_port_init_devices(hwif); 1582 1583 rc = ide_probe_port(hwif); 1584 1585 hwif->port_flags &= ~IDE_PFLAG_PROBING; 1586 1587 if (rc < 0) 1588 return; 1589 1590 hwif->present = 1; 1591 1592 ide_port_tune_devices(hwif); 1593 ide_port_setup_devices(hwif); 1594 ide_acpi_port_init_devices(hwif); 1595 hwif_register_devices(hwif); 1596 ide_proc_port_register_devices(hwif); 1597} 1598EXPORT_SYMBOL_GPL(ide_port_scan); 1599