ide-probe.c revision 42619d35c7af2f88cad56425fe3981f1f65ff0bd
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} 103 104/** 105 * do_identify - identify a drive 106 * @drive: drive to identify 107 * @cmd: command used 108 * 109 * Called when we have issued a drive identify command to 110 * read and parse the results. This function is run with 111 * interrupts disabled. 112 */ 113 114static inline void do_identify (ide_drive_t *drive, u8 cmd) 115{ 116 ide_hwif_t *hwif = HWIF(drive); 117 u16 *id = drive->id; 118 char *m = (char *)&id[ATA_ID_PROD]; 119 int bswap = 1, is_cfa; 120 121 /* read 512 bytes of id info */ 122 hwif->tp_ops->input_data(drive, NULL, id, SECTOR_SIZE); 123 124 drive->dev_flags |= IDE_DFLAG_ID_READ; 125 126 local_irq_enable(); 127#ifdef DEBUG 128 printk(KERN_INFO "%s: dumping identify data\n", drive->name); 129 ide_dump_identify((u8 *)id); 130#endif 131 ide_fix_driveid(id); 132 133 /* 134 * ATA_CMD_ID_ATA returns little-endian info, 135 * ATA_CMD_ID_ATAPI *usually* returns little-endian info. 136 */ 137 if (cmd == ATA_CMD_ID_ATAPI) { 138 if ((m[0] == 'N' && m[1] == 'E') || /* NEC */ 139 (m[0] == 'F' && m[1] == 'X') || /* Mitsumi */ 140 (m[0] == 'P' && m[1] == 'i')) /* Pioneer */ 141 /* Vertos drives may still be weird */ 142 bswap ^= 1; 143 } 144 145 ide_fixstring(m, ATA_ID_PROD_LEN, bswap); 146 ide_fixstring((char *)&id[ATA_ID_FW_REV], ATA_ID_FW_REV_LEN, bswap); 147 ide_fixstring((char *)&id[ATA_ID_SERNO], ATA_ID_SERNO_LEN, bswap); 148 149 /* we depend on this a lot! */ 150 m[ATA_ID_PROD_LEN - 1] = '\0'; 151 152 if (strstr(m, "E X A B Y T E N E S T")) 153 goto err_misc; 154 155 printk(KERN_INFO "%s: %s, ", drive->name, m); 156 157 drive->dev_flags |= IDE_DFLAG_PRESENT; 158 drive->dev_flags &= ~IDE_DFLAG_DEAD; 159 160 /* 161 * Check for an ATAPI device 162 */ 163 if (cmd == ATA_CMD_ID_ATAPI) { 164 u8 type = (id[ATA_ID_CONFIG] >> 8) & 0x1f; 165 166 printk(KERN_CONT "ATAPI "); 167 switch (type) { 168 case ide_floppy: 169 if (!strstr(m, "CD-ROM")) { 170 if (!strstr(m, "oppy") && 171 !strstr(m, "poyp") && 172 !strstr(m, "ZIP")) 173 printk(KERN_CONT "cdrom or floppy?, assuming "); 174 if (drive->media != ide_cdrom) { 175 printk(KERN_CONT "FLOPPY"); 176 drive->dev_flags |= IDE_DFLAG_REMOVABLE; 177 break; 178 } 179 } 180 /* Early cdrom models used zero */ 181 type = ide_cdrom; 182 case ide_cdrom: 183 drive->dev_flags |= IDE_DFLAG_REMOVABLE; 184#ifdef CONFIG_PPC 185 /* kludge for Apple PowerBook internal zip */ 186 if (!strstr(m, "CD-ROM") && strstr(m, "ZIP")) { 187 printk(KERN_CONT "FLOPPY"); 188 type = ide_floppy; 189 break; 190 } 191#endif 192 printk(KERN_CONT "CD/DVD-ROM"); 193 break; 194 case ide_tape: 195 printk(KERN_CONT "TAPE"); 196 break; 197 case ide_optical: 198 printk(KERN_CONT "OPTICAL"); 199 drive->dev_flags |= IDE_DFLAG_REMOVABLE; 200 break; 201 default: 202 printk(KERN_CONT "UNKNOWN (type %d)", type); 203 break; 204 } 205 printk(KERN_CONT " drive\n"); 206 drive->media = type; 207 /* an ATAPI device ignores DRDY */ 208 drive->ready_stat = 0; 209 if (ata_id_cdb_intr(id)) 210 drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT; 211 drive->dev_flags |= IDE_DFLAG_DOORLOCKING; 212 /* we don't do head unloading on ATAPI devices */ 213 drive->dev_flags |= IDE_DFLAG_NO_UNLOAD; 214 return; 215 } 216 217 /* 218 * Not an ATAPI device: looks like a "regular" hard disk 219 */ 220 221 is_cfa = ata_id_is_cfa(id); 222 223 /* CF devices are *not* removable in Linux definition of the term */ 224 if (is_cfa == 0 && (id[ATA_ID_CONFIG] & (1 << 7))) 225 drive->dev_flags |= IDE_DFLAG_REMOVABLE; 226 227 drive->media = ide_disk; 228 229 if (!ata_id_has_unload(drive->id)) 230 drive->dev_flags |= IDE_DFLAG_NO_UNLOAD; 231 232 printk(KERN_CONT "%s DISK drive\n", is_cfa ? "CFA" : "ATA"); 233 234 return; 235 236err_misc: 237 kfree(id); 238 drive->dev_flags &= ~IDE_DFLAG_PRESENT; 239 return; 240} 241 242/** 243 * actual_try_to_identify - send ata/atapi identify 244 * @drive: drive to identify 245 * @cmd: command to use 246 * 247 * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive 248 * and waits for a response. It also monitors irqs while this is 249 * happening, in hope of automatically determining which one is 250 * being used by the interface. 251 * 252 * Returns: 0 device was identified 253 * 1 device timed-out (no response to identify request) 254 * 2 device aborted the command (refused to identify itself) 255 */ 256 257static int actual_try_to_identify (ide_drive_t *drive, u8 cmd) 258{ 259 ide_hwif_t *hwif = HWIF(drive); 260 struct ide_io_ports *io_ports = &hwif->io_ports; 261 const struct ide_tp_ops *tp_ops = hwif->tp_ops; 262 int use_altstatus = 0, rc; 263 unsigned long timeout; 264 u8 s = 0, a = 0; 265 266 /* take a deep breath */ 267 msleep(50); 268 269 if (io_ports->ctl_addr) { 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 unsigned long flags; 309 310 /* local CPU only; some systems need this */ 311 local_irq_save(flags); 312 /* drive returned ID */ 313 do_identify(drive, cmd); 314 /* drive responded with ID */ 315 rc = 0; 316 /* clear drive IRQ */ 317 (void)tp_ops->read_status(hwif); 318 local_irq_restore(flags); 319 } else { 320 /* drive refused ID */ 321 rc = 2; 322 } 323 return rc; 324} 325 326/** 327 * try_to_identify - try to identify a drive 328 * @drive: drive to probe 329 * @cmd: command to use 330 * 331 * Issue the identify command and then do IRQ probing to 332 * complete the identification when needed by finding the 333 * IRQ the drive is attached to 334 */ 335 336static int try_to_identify (ide_drive_t *drive, u8 cmd) 337{ 338 ide_hwif_t *hwif = HWIF(drive); 339 const struct ide_tp_ops *tp_ops = hwif->tp_ops; 340 int retval; 341 int autoprobe = 0; 342 unsigned long cookie = 0; 343 344 /* 345 * Disable device irq unless we need to 346 * probe for it. Otherwise we'll get spurious 347 * interrupts during the identify-phase that 348 * the irq handler isn't expecting. 349 */ 350 if (hwif->io_ports.ctl_addr) { 351 if (!hwif->irq) { 352 autoprobe = 1; 353 cookie = probe_irq_on(); 354 } 355 tp_ops->set_irq(hwif, autoprobe); 356 } 357 358 retval = actual_try_to_identify(drive, cmd); 359 360 if (autoprobe) { 361 int irq; 362 363 tp_ops->set_irq(hwif, 0); 364 /* clear drive IRQ */ 365 (void)tp_ops->read_status(hwif); 366 udelay(5); 367 irq = probe_irq_off(cookie); 368 if (!hwif->irq) { 369 if (irq > 0) { 370 hwif->irq = irq; 371 } else { 372 /* Mmmm.. multiple IRQs.. 373 * don't know which was ours 374 */ 375 printk(KERN_ERR "%s: IRQ probe failed (0x%lx)\n", 376 drive->name, cookie); 377 } 378 } 379 } 380 return retval; 381} 382 383int ide_busy_sleep(ide_hwif_t *hwif, unsigned long timeout, int altstatus) 384{ 385 u8 stat; 386 387 timeout += jiffies; 388 389 do { 390 msleep(50); /* give drive a breather */ 391 stat = altstatus ? hwif->tp_ops->read_altstatus(hwif) 392 : hwif->tp_ops->read_status(hwif); 393 if ((stat & ATA_BUSY) == 0) 394 return 0; 395 } while (time_before(jiffies, timeout)); 396 397 return 1; /* drive timed-out */ 398} 399 400static u8 ide_read_device(ide_drive_t *drive) 401{ 402 ide_task_t task; 403 404 memset(&task, 0, sizeof(task)); 405 task.tf_flags = IDE_TFLAG_IN_DEVICE; 406 407 drive->hwif->tp_ops->tf_read(drive, &task); 408 409 return task.tf.device; 410} 411 412/** 413 * do_probe - probe an IDE device 414 * @drive: drive to probe 415 * @cmd: command to use 416 * 417 * do_probe() has the difficult job of finding a drive if it exists, 418 * without getting hung up if it doesn't exist, without trampling on 419 * ethernet cards, and without leaving any IRQs dangling to haunt us later. 420 * 421 * If a drive is "known" to exist (from CMOS or kernel parameters), 422 * but does not respond right away, the probe will "hang in there" 423 * for the maximum wait time (about 30 seconds), otherwise it will 424 * exit much more quickly. 425 * 426 * Returns: 0 device was identified 427 * 1 device timed-out (no response to identify request) 428 * 2 device aborted the command (refused to identify itself) 429 * 3 bad status from device (possible for ATAPI drives) 430 * 4 probe was not attempted because failure was obvious 431 */ 432 433static int do_probe (ide_drive_t *drive, u8 cmd) 434{ 435 ide_hwif_t *hwif = HWIF(drive); 436 const struct ide_tp_ops *tp_ops = hwif->tp_ops; 437 int rc; 438 u8 present = !!(drive->dev_flags & IDE_DFLAG_PRESENT), stat; 439 440 /* avoid waiting for inappropriate probes */ 441 if (present && drive->media != ide_disk && cmd == ATA_CMD_ID_ATA) 442 return 4; 443 444#ifdef DEBUG 445 printk(KERN_INFO "probing for %s: present=%d, media=%d, probetype=%s\n", 446 drive->name, present, drive->media, 447 (cmd == ATA_CMD_ID_ATA) ? "ATA" : "ATAPI"); 448#endif 449 450 /* needed for some systems 451 * (e.g. crw9624 as drive0 with disk as slave) 452 */ 453 msleep(50); 454 SELECT_DRIVE(drive); 455 msleep(50); 456 457 if (ide_read_device(drive) != drive->select && present == 0) { 458 if (drive->dn & 1) { 459 /* exit with drive0 selected */ 460 SELECT_DRIVE(&hwif->drives[0]); 461 /* allow ATA_BUSY to assert & clear */ 462 msleep(50); 463 } 464 /* no i/f present: mmm.. this should be a 4 -ml */ 465 return 3; 466 } 467 468 stat = tp_ops->read_status(hwif); 469 470 if (OK_STAT(stat, ATA_DRDY, ATA_BUSY) || 471 present || cmd == ATA_CMD_ID_ATAPI) { 472 /* send cmd and wait */ 473 if ((rc = try_to_identify(drive, cmd))) { 474 /* failed: try again */ 475 rc = try_to_identify(drive,cmd); 476 } 477 478 stat = tp_ops->read_status(hwif); 479 480 if (stat == (ATA_BUSY | ATA_DRDY)) 481 return 4; 482 483 if (rc == 1 && cmd == ATA_CMD_ID_ATAPI) { 484 printk(KERN_ERR "%s: no response (status = 0x%02x), " 485 "resetting drive\n", drive->name, stat); 486 msleep(50); 487 SELECT_DRIVE(drive); 488 msleep(50); 489 tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET); 490 (void)ide_busy_sleep(hwif, WAIT_WORSTCASE, 0); 491 rc = try_to_identify(drive, cmd); 492 } 493 494 /* ensure drive IRQ is clear */ 495 stat = tp_ops->read_status(hwif); 496 497 if (rc == 1) 498 printk(KERN_ERR "%s: no response (status = 0x%02x)\n", 499 drive->name, stat); 500 } else { 501 /* not present or maybe ATAPI */ 502 rc = 3; 503 } 504 if (drive->dn & 1) { 505 /* exit with drive0 selected */ 506 SELECT_DRIVE(&hwif->drives[0]); 507 msleep(50); 508 /* ensure drive irq is clear */ 509 (void)tp_ops->read_status(hwif); 510 } 511 return rc; 512} 513 514/* 515 * 516 */ 517static void enable_nest (ide_drive_t *drive) 518{ 519 ide_hwif_t *hwif = HWIF(drive); 520 const struct ide_tp_ops *tp_ops = hwif->tp_ops; 521 u8 stat; 522 523 printk(KERN_INFO "%s: enabling %s -- ", 524 hwif->name, (char *)&drive->id[ATA_ID_PROD]); 525 526 SELECT_DRIVE(drive); 527 msleep(50); 528 tp_ops->exec_command(hwif, ATA_EXABYTE_ENABLE_NEST); 529 530 if (ide_busy_sleep(hwif, WAIT_WORSTCASE, 0)) { 531 printk(KERN_CONT "failed (timeout)\n"); 532 return; 533 } 534 535 msleep(50); 536 537 stat = tp_ops->read_status(hwif); 538 539 if (!OK_STAT(stat, 0, BAD_STAT)) 540 printk(KERN_CONT "failed (status = 0x%02x)\n", stat); 541 else 542 printk(KERN_CONT "success\n"); 543} 544 545/** 546 * probe_for_drives - upper level drive probe 547 * @drive: drive to probe for 548 * 549 * probe_for_drive() tests for existence of a given drive using do_probe() 550 * and presents things to the user as needed. 551 * 552 * Returns: 0 no device was found 553 * 1 device was found 554 * (note: IDE_DFLAG_PRESENT might still be not set) 555 */ 556 557static inline u8 probe_for_drive (ide_drive_t *drive) 558{ 559 char *m; 560 561 /* 562 * In order to keep things simple we have an id 563 * block for all drives at all times. If the device 564 * is pre ATA or refuses ATA/ATAPI identify we 565 * will add faked data to this. 566 * 567 * Also note that 0 everywhere means "can't do X" 568 */ 569 570 drive->dev_flags &= ~IDE_DFLAG_ID_READ; 571 572 drive->id = kzalloc(SECTOR_SIZE, GFP_KERNEL); 573 if (drive->id == NULL) { 574 printk(KERN_ERR "ide: out of memory for id data.\n"); 575 return 0; 576 } 577 578 m = (char *)&drive->id[ATA_ID_PROD]; 579 strcpy(m, "UNKNOWN"); 580 581 /* skip probing? */ 582 if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0) { 583retry: 584 /* if !(success||timed-out) */ 585 if (do_probe(drive, ATA_CMD_ID_ATA) >= 2) 586 /* look for ATAPI device */ 587 (void)do_probe(drive, ATA_CMD_ID_ATAPI); 588 589 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) 590 /* drive not found */ 591 return 0; 592 593 if (strstr(m, "E X A B Y T E N E S T")) { 594 enable_nest(drive); 595 goto retry; 596 } 597 598 /* identification failed? */ 599 if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) { 600 if (drive->media == ide_disk) { 601 printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n", 602 drive->name, drive->cyl, 603 drive->head, drive->sect); 604 } else if (drive->media == ide_cdrom) { 605 printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name); 606 } else { 607 /* nuke it */ 608 printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name); 609 drive->dev_flags &= ~IDE_DFLAG_PRESENT; 610 } 611 } 612 /* drive was found */ 613 } 614 615 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) 616 return 0; 617 618 /* The drive wasn't being helpful. Add generic info only */ 619 if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) { 620 generic_id(drive); 621 return 1; 622 } 623 624 if (drive->media == ide_disk) { 625 ide_disk_init_chs(drive); 626 ide_disk_init_mult_count(drive); 627 } 628 629 return !!(drive->dev_flags & IDE_DFLAG_PRESENT); 630} 631 632static void hwif_release_dev(struct device *dev) 633{ 634 ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev); 635 636 complete(&hwif->gendev_rel_comp); 637} 638 639static int ide_register_port(ide_hwif_t *hwif) 640{ 641 int ret; 642 643 /* register with global device tree */ 644 strlcpy(hwif->gendev.bus_id,hwif->name,BUS_ID_SIZE); 645 hwif->gendev.driver_data = hwif; 646 if (hwif->gendev.parent == NULL) { 647 if (hwif->dev) 648 hwif->gendev.parent = hwif->dev; 649 else 650 /* Would like to do = &device_legacy */ 651 hwif->gendev.parent = NULL; 652 } 653 hwif->gendev.release = hwif_release_dev; 654 ret = device_register(&hwif->gendev); 655 if (ret < 0) { 656 printk(KERN_WARNING "IDE: %s: device_register error: %d\n", 657 __func__, ret); 658 goto out; 659 } 660 661 hwif->portdev = device_create(ide_port_class, &hwif->gendev, 662 MKDEV(0, 0), hwif, hwif->name); 663 if (IS_ERR(hwif->portdev)) { 664 ret = PTR_ERR(hwif->portdev); 665 device_unregister(&hwif->gendev); 666 } 667out: 668 return ret; 669} 670 671/** 672 * ide_port_wait_ready - wait for port to become ready 673 * @hwif: IDE port 674 * 675 * This is needed on some PPCs and a bunch of BIOS-less embedded 676 * platforms. Typical cases are: 677 * 678 * - The firmware hard reset the disk before booting the kernel, 679 * the drive is still doing it's poweron-reset sequence, that 680 * can take up to 30 seconds. 681 * 682 * - The firmware does nothing (or no firmware), the device is 683 * still in POST state (same as above actually). 684 * 685 * - Some CD/DVD/Writer combo drives tend to drive the bus during 686 * their reset sequence even when they are non-selected slave 687 * devices, thus preventing discovery of the main HD. 688 * 689 * Doing this wait-for-non-busy should not harm any existing 690 * configuration and fix some issues like the above. 691 * 692 * BenH. 693 * 694 * Returns 0 on success, error code (< 0) otherwise. 695 */ 696 697static int ide_port_wait_ready(ide_hwif_t *hwif) 698{ 699 int unit, rc; 700 701 printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name); 702 703 /* Let HW settle down a bit from whatever init state we 704 * come from */ 705 mdelay(2); 706 707 /* Wait for BSY bit to go away, spec timeout is 30 seconds, 708 * I know of at least one disk who takes 31 seconds, I use 35 709 * here to be safe 710 */ 711 rc = ide_wait_not_busy(hwif, 35000); 712 if (rc) 713 return rc; 714 715 /* Now make sure both master & slave are ready */ 716 for (unit = 0; unit < MAX_DRIVES; unit++) { 717 ide_drive_t *drive = &hwif->drives[unit]; 718 719 /* Ignore disks that we will not probe for later. */ 720 if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0 || 721 (drive->dev_flags & IDE_DFLAG_PRESENT)) { 722 SELECT_DRIVE(drive); 723 hwif->tp_ops->set_irq(hwif, 1); 724 mdelay(2); 725 rc = ide_wait_not_busy(hwif, 35000); 726 if (rc) 727 goto out; 728 } else 729 printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n", 730 drive->name); 731 } 732out: 733 /* Exit function with master reselected (let's be sane) */ 734 if (unit) 735 SELECT_DRIVE(&hwif->drives[0]); 736 737 return rc; 738} 739 740/** 741 * ide_undecoded_slave - look for bad CF adapters 742 * @dev1: slave device 743 * 744 * Analyse the drives on the interface and attempt to decide if we 745 * have the same drive viewed twice. This occurs with crap CF adapters 746 * and PCMCIA sometimes. 747 */ 748 749void ide_undecoded_slave(ide_drive_t *dev1) 750{ 751 ide_drive_t *dev0 = &dev1->hwif->drives[0]; 752 753 if ((dev1->dn & 1) == 0 || (dev0->dev_flags & IDE_DFLAG_PRESENT) == 0) 754 return; 755 756 /* If the models don't match they are not the same product */ 757 if (strcmp((char *)&dev0->id[ATA_ID_PROD], 758 (char *)&dev1->id[ATA_ID_PROD])) 759 return; 760 761 /* Serial numbers do not match */ 762 if (strncmp((char *)&dev0->id[ATA_ID_SERNO], 763 (char *)&dev1->id[ATA_ID_SERNO], ATA_ID_SERNO_LEN)) 764 return; 765 766 /* No serial number, thankfully very rare for CF */ 767 if (*(char *)&dev0->id[ATA_ID_SERNO] == 0) 768 return; 769 770 /* Appears to be an IDE flash adapter with decode bugs */ 771 printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n"); 772 773 dev1->dev_flags &= ~IDE_DFLAG_PRESENT; 774} 775 776EXPORT_SYMBOL_GPL(ide_undecoded_slave); 777 778static int ide_probe_port(ide_hwif_t *hwif) 779{ 780 unsigned long flags; 781 unsigned int irqd; 782 int unit, rc = -ENODEV; 783 784 BUG_ON(hwif->present); 785 786 if ((hwif->drives[0].dev_flags & IDE_DFLAG_NOPROBE) && 787 (hwif->drives[1].dev_flags & IDE_DFLAG_NOPROBE)) 788 return -EACCES; 789 790 /* 791 * We must always disable IRQ, as probe_for_drive will assert IRQ, but 792 * we'll install our IRQ driver much later... 793 */ 794 irqd = hwif->irq; 795 if (irqd) 796 disable_irq(hwif->irq); 797 798 local_irq_set(flags); 799 800 if (ide_port_wait_ready(hwif) == -EBUSY) 801 printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name); 802 803 /* 804 * Second drive should only exist if first drive was found, 805 * but a lot of cdrom drives are configured as single slaves. 806 */ 807 for (unit = 0; unit < MAX_DRIVES; ++unit) { 808 ide_drive_t *drive = &hwif->drives[unit]; 809 810 (void) probe_for_drive(drive); 811 if (drive->dev_flags & IDE_DFLAG_PRESENT) 812 rc = 0; 813 } 814 815 local_irq_restore(flags); 816 817 /* 818 * Use cached IRQ number. It might be (and is...) changed by probe 819 * code above 820 */ 821 if (irqd) 822 enable_irq(irqd); 823 824 return rc; 825} 826 827static void ide_port_tune_devices(ide_hwif_t *hwif) 828{ 829 const struct ide_port_ops *port_ops = hwif->port_ops; 830 int unit; 831 832 for (unit = 0; unit < MAX_DRIVES; unit++) { 833 ide_drive_t *drive = &hwif->drives[unit]; 834 835 if (drive->dev_flags & IDE_DFLAG_PRESENT) { 836 if (port_ops && port_ops->quirkproc) 837 port_ops->quirkproc(drive); 838 } 839 } 840 841 for (unit = 0; unit < MAX_DRIVES; ++unit) { 842 ide_drive_t *drive = &hwif->drives[unit]; 843 844 if (drive->dev_flags & IDE_DFLAG_PRESENT) { 845 ide_set_max_pio(drive); 846 847 drive->dev_flags |= IDE_DFLAG_NICE1; 848 849 if (hwif->dma_ops) 850 ide_set_dma(drive); 851 } 852 } 853 854 for (unit = 0; unit < MAX_DRIVES; ++unit) { 855 ide_drive_t *drive = &hwif->drives[unit]; 856 857 if ((hwif->host_flags & IDE_HFLAG_NO_IO_32BIT) || 858 drive->id[ATA_ID_DWORD_IO]) 859 drive->dev_flags |= IDE_DFLAG_NO_IO_32BIT; 860 else 861 drive->dev_flags &= ~IDE_DFLAG_NO_IO_32BIT; 862 } 863} 864 865/* 866 * save_match() is used to simplify logic in init_irq() below. 867 * 868 * A loophole here is that we may not know about a particular 869 * hwif's irq until after that hwif is actually probed/initialized.. 870 * This could be a problem for the case where an hwif is on a 871 * dual interface that requires serialization (eg. cmd640) and another 872 * hwif using one of the same irqs is initialized beforehand. 873 * 874 * This routine detects and reports such situations, but does not fix them. 875 */ 876static void save_match(ide_hwif_t *hwif, ide_hwif_t *new, ide_hwif_t **match) 877{ 878 ide_hwif_t *m = *match; 879 880 if (m && m->hwgroup && m->hwgroup != new->hwgroup) { 881 if (!new->hwgroup) 882 return; 883 printk(KERN_WARNING "%s: potential IRQ problem with %s and %s\n", 884 hwif->name, new->name, m->name); 885 } 886 if (!m || m->irq != hwif->irq) /* don't undo a prior perfect match */ 887 *match = new; 888} 889 890/* 891 * init request queue 892 */ 893static int ide_init_queue(ide_drive_t *drive) 894{ 895 struct request_queue *q; 896 ide_hwif_t *hwif = HWIF(drive); 897 int max_sectors = 256; 898 int max_sg_entries = PRD_ENTRIES; 899 900 /* 901 * Our default set up assumes the normal IDE case, 902 * that is 64K segmenting, standard PRD setup 903 * and LBA28. Some drivers then impose their own 904 * limits and LBA48 we could raise it but as yet 905 * do not. 906 */ 907 908 q = blk_init_queue_node(do_ide_request, &ide_lock, hwif_to_node(hwif)); 909 if (!q) 910 return 1; 911 912 q->queuedata = drive; 913 blk_queue_segment_boundary(q, 0xffff); 914 915 if (hwif->rqsize < max_sectors) 916 max_sectors = hwif->rqsize; 917 blk_queue_max_sectors(q, max_sectors); 918 919#ifdef CONFIG_PCI 920 /* When we have an IOMMU, we may have a problem where pci_map_sg() 921 * creates segments that don't completely match our boundary 922 * requirements and thus need to be broken up again. Because it 923 * doesn't align properly either, we may actually have to break up 924 * to more segments than what was we got in the first place, a max 925 * worst case is twice as many. 926 * This will be fixed once we teach pci_map_sg() about our boundary 927 * requirements, hopefully soon. *FIXME* 928 */ 929 if (!PCI_DMA_BUS_IS_PHYS) 930 max_sg_entries >>= 1; 931#endif /* CONFIG_PCI */ 932 933 blk_queue_max_hw_segments(q, max_sg_entries); 934 blk_queue_max_phys_segments(q, max_sg_entries); 935 936 /* assign drive queue */ 937 drive->queue = q; 938 939 /* needs drive->queue to be set */ 940 ide_toggle_bounce(drive, 1); 941 942 return 0; 943} 944 945static void ide_add_drive_to_hwgroup(ide_drive_t *drive) 946{ 947 ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; 948 949 spin_lock_irq(&ide_lock); 950 if (!hwgroup->drive) { 951 /* first drive for hwgroup. */ 952 drive->next = drive; 953 hwgroup->drive = drive; 954 hwgroup->hwif = HWIF(hwgroup->drive); 955 } else { 956 drive->next = hwgroup->drive->next; 957 hwgroup->drive->next = drive; 958 } 959 spin_unlock_irq(&ide_lock); 960} 961 962/* 963 * For any present drive: 964 * - allocate the block device queue 965 * - link drive into the hwgroup 966 */ 967static int ide_port_setup_devices(ide_hwif_t *hwif) 968{ 969 int i, j = 0; 970 971 mutex_lock(&ide_cfg_mtx); 972 for (i = 0; i < MAX_DRIVES; i++) { 973 ide_drive_t *drive = &hwif->drives[i]; 974 975 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) 976 continue; 977 978 if (ide_init_queue(drive)) { 979 printk(KERN_ERR "ide: failed to init %s\n", 980 drive->name); 981 kfree(drive->id); 982 drive->id = NULL; 983 drive->dev_flags &= ~IDE_DFLAG_PRESENT; 984 continue; 985 } 986 987 j++; 988 989 ide_add_drive_to_hwgroup(drive); 990 } 991 mutex_unlock(&ide_cfg_mtx); 992 993 return j; 994} 995 996static ide_hwif_t *ide_ports[MAX_HWIFS]; 997 998void ide_remove_port_from_hwgroup(ide_hwif_t *hwif) 999{ 1000 ide_hwgroup_t *hwgroup = hwif->hwgroup; 1001 1002 ide_ports[hwif->index] = NULL; 1003 1004 spin_lock_irq(&ide_lock); 1005 /* 1006 * Remove us from the hwgroup, and free 1007 * the hwgroup if we were the only member 1008 */ 1009 if (hwif->next == hwif) { 1010 BUG_ON(hwgroup->hwif != hwif); 1011 kfree(hwgroup); 1012 } else { 1013 /* There is another interface in hwgroup. 1014 * Unlink us, and set hwgroup->drive and ->hwif to 1015 * something sane. 1016 */ 1017 ide_hwif_t *g = hwgroup->hwif; 1018 1019 while (g->next != hwif) 1020 g = g->next; 1021 g->next = hwif->next; 1022 if (hwgroup->hwif == hwif) { 1023 /* Chose a random hwif for hwgroup->hwif. 1024 * It's guaranteed that there are no drives 1025 * left in the hwgroup. 1026 */ 1027 BUG_ON(hwgroup->drive != NULL); 1028 hwgroup->hwif = g; 1029 } 1030 BUG_ON(hwgroup->hwif == hwif); 1031 } 1032 spin_unlock_irq(&ide_lock); 1033} 1034 1035/* 1036 * This routine sets up the irq for an ide interface, and creates a new 1037 * hwgroup for the irq/hwif if none was previously assigned. 1038 * 1039 * Much of the code is for correctly detecting/handling irq sharing 1040 * and irq serialization situations. This is somewhat complex because 1041 * it handles static as well as dynamic (PCMCIA) IDE interfaces. 1042 */ 1043static int init_irq (ide_hwif_t *hwif) 1044{ 1045 struct ide_io_ports *io_ports = &hwif->io_ports; 1046 unsigned int index; 1047 ide_hwgroup_t *hwgroup; 1048 ide_hwif_t *match = NULL; 1049 1050 mutex_lock(&ide_cfg_mtx); 1051 hwif->hwgroup = NULL; 1052 1053 /* 1054 * Group up with any other hwifs that share our irq(s). 1055 */ 1056 for (index = 0; index < MAX_HWIFS; index++) { 1057 ide_hwif_t *h = ide_ports[index]; 1058 1059 if (h && h->hwgroup) { /* scan only initialized ports */ 1060 if (hwif->irq == h->irq) { 1061 hwif->sharing_irq = h->sharing_irq = 1; 1062 if (hwif->chipset != ide_pci || 1063 h->chipset != ide_pci) { 1064 save_match(hwif, h, &match); 1065 } 1066 } 1067 if (hwif->serialized) { 1068 if (hwif->mate && hwif->mate->irq == h->irq) 1069 save_match(hwif, h, &match); 1070 } 1071 if (h->serialized) { 1072 if (h->mate && hwif->irq == h->mate->irq) 1073 save_match(hwif, h, &match); 1074 } 1075 } 1076 } 1077 1078 /* 1079 * If we are still without a hwgroup, then form a new one 1080 */ 1081 if (match) { 1082 hwgroup = match->hwgroup; 1083 hwif->hwgroup = hwgroup; 1084 /* 1085 * Link us into the hwgroup. 1086 * This must be done early, do ensure that unexpected_intr 1087 * can find the hwif and prevent irq storms. 1088 * No drives are attached to the new hwif, choose_drive 1089 * can't do anything stupid (yet). 1090 * Add ourself as the 2nd entry to the hwgroup->hwif 1091 * linked list, the first entry is the hwif that owns 1092 * hwgroup->handler - do not change that. 1093 */ 1094 spin_lock_irq(&ide_lock); 1095 hwif->next = hwgroup->hwif->next; 1096 hwgroup->hwif->next = hwif; 1097 BUG_ON(hwif->next == hwif); 1098 spin_unlock_irq(&ide_lock); 1099 } else { 1100 hwgroup = kmalloc_node(sizeof(*hwgroup), GFP_KERNEL|__GFP_ZERO, 1101 hwif_to_node(hwif)); 1102 if (hwgroup == NULL) 1103 goto out_up; 1104 1105 hwif->hwgroup = hwgroup; 1106 hwgroup->hwif = hwif->next = hwif; 1107 1108 init_timer(&hwgroup->timer); 1109 hwgroup->timer.function = &ide_timer_expiry; 1110 hwgroup->timer.data = (unsigned long) hwgroup; 1111 } 1112 1113 ide_ports[hwif->index] = hwif; 1114 1115 /* 1116 * Allocate the irq, if not already obtained for another hwif 1117 */ 1118 if (!match || match->irq != hwif->irq) { 1119 int sa = 0; 1120#if defined(__mc68000__) 1121 sa = IRQF_SHARED; 1122#endif /* __mc68000__ */ 1123 1124 if (hwif->chipset == ide_pci || hwif->chipset == ide_cmd646 || 1125 hwif->chipset == ide_ali14xx) 1126 sa = IRQF_SHARED; 1127 1128 if (io_ports->ctl_addr) 1129 hwif->tp_ops->set_irq(hwif, 1); 1130 1131 if (request_irq(hwif->irq,&ide_intr,sa,hwif->name,hwgroup)) 1132 goto out_unlink; 1133 } 1134 1135 if (!hwif->rqsize) { 1136 if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) || 1137 (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA)) 1138 hwif->rqsize = 256; 1139 else 1140 hwif->rqsize = 65536; 1141 } 1142 1143#if !defined(__mc68000__) 1144 printk(KERN_INFO "%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name, 1145 io_ports->data_addr, io_ports->status_addr, 1146 io_ports->ctl_addr, hwif->irq); 1147#else 1148 printk(KERN_INFO "%s at 0x%08lx on irq %d", hwif->name, 1149 io_ports->data_addr, hwif->irq); 1150#endif /* __mc68000__ */ 1151 if (match) 1152 printk(KERN_CONT " (%sed with %s)", 1153 hwif->sharing_irq ? "shar" : "serializ", match->name); 1154 printk(KERN_CONT "\n"); 1155 1156 mutex_unlock(&ide_cfg_mtx); 1157 return 0; 1158out_unlink: 1159 ide_remove_port_from_hwgroup(hwif); 1160out_up: 1161 mutex_unlock(&ide_cfg_mtx); 1162 return 1; 1163} 1164 1165static int ata_lock(dev_t dev, void *data) 1166{ 1167 /* FIXME: we want to pin hwif down */ 1168 return 0; 1169} 1170 1171static struct kobject *ata_probe(dev_t dev, int *part, void *data) 1172{ 1173 ide_hwif_t *hwif = data; 1174 int unit = *part >> PARTN_BITS; 1175 ide_drive_t *drive = &hwif->drives[unit]; 1176 1177 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) 1178 return NULL; 1179 1180 if (drive->media == ide_disk) 1181 request_module("ide-disk"); 1182 if (drive->dev_flags & IDE_DFLAG_SCSI) 1183 request_module("ide-scsi"); 1184 if (drive->media == ide_cdrom || drive->media == ide_optical) 1185 request_module("ide-cd"); 1186 if (drive->media == ide_tape) 1187 request_module("ide-tape"); 1188 if (drive->media == ide_floppy) 1189 request_module("ide-floppy"); 1190 1191 return NULL; 1192} 1193 1194static struct kobject *exact_match(dev_t dev, int *part, void *data) 1195{ 1196 struct gendisk *p = data; 1197 *part &= (1 << PARTN_BITS) - 1; 1198 return &disk_to_dev(p)->kobj; 1199} 1200 1201static int exact_lock(dev_t dev, void *data) 1202{ 1203 struct gendisk *p = data; 1204 1205 if (!get_disk(p)) 1206 return -1; 1207 return 0; 1208} 1209 1210void ide_register_region(struct gendisk *disk) 1211{ 1212 blk_register_region(MKDEV(disk->major, disk->first_minor), 1213 disk->minors, NULL, exact_match, exact_lock, disk); 1214} 1215 1216EXPORT_SYMBOL_GPL(ide_register_region); 1217 1218void ide_unregister_region(struct gendisk *disk) 1219{ 1220 blk_unregister_region(MKDEV(disk->major, disk->first_minor), 1221 disk->minors); 1222} 1223 1224EXPORT_SYMBOL_GPL(ide_unregister_region); 1225 1226void ide_init_disk(struct gendisk *disk, ide_drive_t *drive) 1227{ 1228 ide_hwif_t *hwif = drive->hwif; 1229 unsigned int unit = drive->dn & 1; 1230 1231 disk->major = hwif->major; 1232 disk->first_minor = unit << PARTN_BITS; 1233 sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit); 1234 disk->queue = drive->queue; 1235} 1236 1237EXPORT_SYMBOL_GPL(ide_init_disk); 1238 1239static void ide_remove_drive_from_hwgroup(ide_drive_t *drive) 1240{ 1241 ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; 1242 1243 if (drive == drive->next) { 1244 /* special case: last drive from hwgroup. */ 1245 BUG_ON(hwgroup->drive != drive); 1246 hwgroup->drive = NULL; 1247 } else { 1248 ide_drive_t *walk; 1249 1250 walk = hwgroup->drive; 1251 while (walk->next != drive) 1252 walk = walk->next; 1253 walk->next = drive->next; 1254 if (hwgroup->drive == drive) { 1255 hwgroup->drive = drive->next; 1256 hwgroup->hwif = hwgroup->drive->hwif; 1257 } 1258 } 1259 BUG_ON(hwgroup->drive == drive); 1260} 1261 1262static void drive_release_dev (struct device *dev) 1263{ 1264 ide_drive_t *drive = container_of(dev, ide_drive_t, gendev); 1265 1266 ide_proc_unregister_device(drive); 1267 1268 spin_lock_irq(&ide_lock); 1269 ide_remove_drive_from_hwgroup(drive); 1270 kfree(drive->id); 1271 drive->id = NULL; 1272 drive->dev_flags &= ~IDE_DFLAG_PRESENT; 1273 /* Messed up locking ... */ 1274 spin_unlock_irq(&ide_lock); 1275 blk_cleanup_queue(drive->queue); 1276 spin_lock_irq(&ide_lock); 1277 drive->queue = NULL; 1278 spin_unlock_irq(&ide_lock); 1279 1280 complete(&drive->gendev_rel_comp); 1281} 1282 1283static int hwif_init(ide_hwif_t *hwif) 1284{ 1285 int old_irq; 1286 1287 if (!hwif->irq) { 1288 hwif->irq = __ide_default_irq(hwif->io_ports.data_addr); 1289 if (!hwif->irq) { 1290 printk(KERN_ERR "%s: disabled, no IRQ\n", hwif->name); 1291 return 0; 1292 } 1293 } 1294 1295 if (register_blkdev(hwif->major, hwif->name)) 1296 return 0; 1297 1298 if (!hwif->sg_max_nents) 1299 hwif->sg_max_nents = PRD_ENTRIES; 1300 1301 hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents, 1302 GFP_KERNEL); 1303 if (!hwif->sg_table) { 1304 printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name); 1305 goto out; 1306 } 1307 1308 sg_init_table(hwif->sg_table, hwif->sg_max_nents); 1309 1310 if (init_irq(hwif) == 0) 1311 goto done; 1312 1313 old_irq = hwif->irq; 1314 /* 1315 * It failed to initialise. Find the default IRQ for 1316 * this port and try that. 1317 */ 1318 hwif->irq = __ide_default_irq(hwif->io_ports.data_addr); 1319 if (!hwif->irq) { 1320 printk(KERN_ERR "%s: disabled, unable to get IRQ %d\n", 1321 hwif->name, old_irq); 1322 goto out; 1323 } 1324 if (init_irq(hwif)) { 1325 printk(KERN_ERR "%s: probed IRQ %d and default IRQ %d failed\n", 1326 hwif->name, old_irq, hwif->irq); 1327 goto out; 1328 } 1329 printk(KERN_WARNING "%s: probed IRQ %d failed, using default\n", 1330 hwif->name, hwif->irq); 1331 1332done: 1333 blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS, 1334 THIS_MODULE, ata_probe, ata_lock, hwif); 1335 return 1; 1336 1337out: 1338 unregister_blkdev(hwif->major, hwif->name); 1339 return 0; 1340} 1341 1342static void hwif_register_devices(ide_hwif_t *hwif) 1343{ 1344 unsigned int i; 1345 1346 for (i = 0; i < MAX_DRIVES; i++) { 1347 ide_drive_t *drive = &hwif->drives[i]; 1348 struct device *dev = &drive->gendev; 1349 int ret; 1350 1351 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) 1352 continue; 1353 1354 snprintf(dev->bus_id, BUS_ID_SIZE, "%u.%u", hwif->index, i); 1355 dev->parent = &hwif->gendev; 1356 dev->bus = &ide_bus_type; 1357 dev->driver_data = drive; 1358 dev->release = drive_release_dev; 1359 1360 ret = device_register(dev); 1361 if (ret < 0) 1362 printk(KERN_WARNING "IDE: %s: device_register error: " 1363 "%d\n", __func__, ret); 1364 } 1365} 1366 1367static void ide_port_init_devices(ide_hwif_t *hwif) 1368{ 1369 const struct ide_port_ops *port_ops = hwif->port_ops; 1370 int i; 1371 1372 for (i = 0; i < MAX_DRIVES; i++) { 1373 ide_drive_t *drive = &hwif->drives[i]; 1374 1375 drive->dn = i + hwif->channel * 2; 1376 1377 if (hwif->host_flags & IDE_HFLAG_IO_32BIT) 1378 drive->io_32bit = 1; 1379 if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS) 1380 drive->dev_flags |= IDE_DFLAG_UNMASK; 1381 if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS) 1382 drive->dev_flags |= IDE_DFLAG_NO_UNMASK; 1383 1384 if (port_ops && port_ops->init_dev) 1385 port_ops->init_dev(drive); 1386 } 1387} 1388 1389static void ide_init_port(ide_hwif_t *hwif, unsigned int port, 1390 const struct ide_port_info *d) 1391{ 1392 hwif->channel = port; 1393 1394 if (d->chipset) 1395 hwif->chipset = d->chipset; 1396 1397 if (d->init_iops) 1398 d->init_iops(hwif); 1399 1400 if ((!hwif->irq && (d->host_flags & IDE_HFLAG_LEGACY_IRQS)) || 1401 (d->host_flags & IDE_HFLAG_FORCE_LEGACY_IRQS)) 1402 hwif->irq = port ? 15 : 14; 1403 1404 /* ->host_flags may be set by ->init_iops (or even earlier...) */ 1405 hwif->host_flags |= d->host_flags; 1406 hwif->pio_mask = d->pio_mask; 1407 1408 if (d->tp_ops) 1409 hwif->tp_ops = d->tp_ops; 1410 1411 /* ->set_pio_mode for DTC2278 is currently limited to port 0 */ 1412 if (hwif->chipset != ide_dtc2278 || hwif->channel == 0) 1413 hwif->port_ops = d->port_ops; 1414 1415 hwif->swdma_mask = d->swdma_mask; 1416 hwif->mwdma_mask = d->mwdma_mask; 1417 hwif->ultra_mask = d->udma_mask; 1418 1419 if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) { 1420 int rc; 1421 1422 if (d->init_dma) 1423 rc = d->init_dma(hwif, d); 1424 else 1425 rc = ide_hwif_setup_dma(hwif, d); 1426 1427 if (rc < 0) { 1428 printk(KERN_INFO "%s: DMA disabled\n", hwif->name); 1429 hwif->dma_base = 0; 1430 hwif->swdma_mask = 0; 1431 hwif->mwdma_mask = 0; 1432 hwif->ultra_mask = 0; 1433 } else if (d->dma_ops) 1434 hwif->dma_ops = d->dma_ops; 1435 } 1436 1437 if ((d->host_flags & IDE_HFLAG_SERIALIZE) || 1438 ((d->host_flags & IDE_HFLAG_SERIALIZE_DMA) && hwif->dma_base)) { 1439 if (hwif->mate) 1440 hwif->mate->serialized = hwif->serialized = 1; 1441 } 1442 1443 if (d->host_flags & IDE_HFLAG_RQSIZE_256) 1444 hwif->rqsize = 256; 1445 1446 /* call chipset specific routine for each enabled port */ 1447 if (d->init_hwif) 1448 d->init_hwif(hwif); 1449} 1450 1451static void ide_port_cable_detect(ide_hwif_t *hwif) 1452{ 1453 const struct ide_port_ops *port_ops = hwif->port_ops; 1454 1455 if (port_ops && port_ops->cable_detect && (hwif->ultra_mask & 0x78)) { 1456 if (hwif->cbl != ATA_CBL_PATA40_SHORT) 1457 hwif->cbl = port_ops->cable_detect(hwif); 1458 } 1459} 1460 1461static ssize_t store_delete_devices(struct device *portdev, 1462 struct device_attribute *attr, 1463 const char *buf, size_t n) 1464{ 1465 ide_hwif_t *hwif = dev_get_drvdata(portdev); 1466 1467 if (strncmp(buf, "1", n)) 1468 return -EINVAL; 1469 1470 ide_port_unregister_devices(hwif); 1471 1472 return n; 1473}; 1474 1475static DEVICE_ATTR(delete_devices, S_IWUSR, NULL, store_delete_devices); 1476 1477static ssize_t store_scan(struct device *portdev, 1478 struct device_attribute *attr, 1479 const char *buf, size_t n) 1480{ 1481 ide_hwif_t *hwif = dev_get_drvdata(portdev); 1482 1483 if (strncmp(buf, "1", n)) 1484 return -EINVAL; 1485 1486 ide_port_unregister_devices(hwif); 1487 ide_port_scan(hwif); 1488 1489 return n; 1490}; 1491 1492static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan); 1493 1494static struct device_attribute *ide_port_attrs[] = { 1495 &dev_attr_delete_devices, 1496 &dev_attr_scan, 1497 NULL 1498}; 1499 1500static int ide_sysfs_register_port(ide_hwif_t *hwif) 1501{ 1502 int i, uninitialized_var(rc); 1503 1504 for (i = 0; ide_port_attrs[i]; i++) { 1505 rc = device_create_file(hwif->portdev, ide_port_attrs[i]); 1506 if (rc) 1507 break; 1508 } 1509 1510 return rc; 1511} 1512 1513static unsigned int ide_indexes; 1514 1515/** 1516 * ide_find_port_slot - find free port slot 1517 * @d: IDE port info 1518 * 1519 * Return the new port slot index or -ENOENT if we are out of free slots. 1520 */ 1521 1522static int ide_find_port_slot(const struct ide_port_info *d) 1523{ 1524 int idx = -ENOENT; 1525 u8 bootable = (d && (d->host_flags & IDE_HFLAG_NON_BOOTABLE)) ? 0 : 1; 1526 u8 i = (d && (d->host_flags & IDE_HFLAG_QD_2ND_PORT)) ? 1 : 0;; 1527 1528 /* 1529 * Claim an unassigned slot. 1530 * 1531 * Give preference to claiming other slots before claiming ide0/ide1, 1532 * just in case there's another interface yet-to-be-scanned 1533 * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults). 1534 * 1535 * Unless there is a bootable card that does not use the standard 1536 * ports 0x1f0/0x170 (the ide0/ide1 defaults). 1537 */ 1538 mutex_lock(&ide_cfg_mtx); 1539 if (bootable) { 1540 if ((ide_indexes | i) != (1 << MAX_HWIFS) - 1) 1541 idx = ffz(ide_indexes | i); 1542 } else { 1543 if ((ide_indexes | 3) != (1 << MAX_HWIFS) - 1) 1544 idx = ffz(ide_indexes | 3); 1545 else if ((ide_indexes & 3) != 3) 1546 idx = ffz(ide_indexes); 1547 } 1548 if (idx >= 0) 1549 ide_indexes |= (1 << idx); 1550 mutex_unlock(&ide_cfg_mtx); 1551 1552 return idx; 1553} 1554 1555static void ide_free_port_slot(int idx) 1556{ 1557 mutex_lock(&ide_cfg_mtx); 1558 ide_indexes &= ~(1 << idx); 1559 mutex_unlock(&ide_cfg_mtx); 1560} 1561 1562struct ide_host *ide_host_alloc(const struct ide_port_info *d, hw_regs_t **hws) 1563{ 1564 struct ide_host *host; 1565 int i; 1566 1567 host = kzalloc(sizeof(*host), GFP_KERNEL); 1568 if (host == NULL) 1569 return NULL; 1570 1571 for (i = 0; i < MAX_HOST_PORTS; i++) { 1572 ide_hwif_t *hwif; 1573 int idx; 1574 1575 if (hws[i] == NULL) 1576 continue; 1577 1578 hwif = kzalloc(sizeof(*hwif), GFP_KERNEL); 1579 if (hwif == NULL) 1580 continue; 1581 1582 idx = ide_find_port_slot(d); 1583 if (idx < 0) { 1584 printk(KERN_ERR "%s: no free slot for interface\n", 1585 d ? d->name : "ide"); 1586 kfree(hwif); 1587 continue; 1588 } 1589 1590 ide_init_port_data(hwif, idx); 1591 1592 hwif->host = host; 1593 1594 host->ports[i] = hwif; 1595 host->n_ports++; 1596 } 1597 1598 if (host->n_ports == 0) { 1599 kfree(host); 1600 return NULL; 1601 } 1602 1603 if (hws[0]) 1604 host->dev[0] = hws[0]->dev; 1605 1606 if (d) { 1607 host->init_chipset = d->init_chipset; 1608 host->host_flags = d->host_flags; 1609 } 1610 1611 return host; 1612} 1613EXPORT_SYMBOL_GPL(ide_host_alloc); 1614 1615int ide_host_register(struct ide_host *host, const struct ide_port_info *d, 1616 hw_regs_t **hws) 1617{ 1618 ide_hwif_t *hwif, *mate = NULL; 1619 int i, j = 0; 1620 1621 for (i = 0; i < MAX_HOST_PORTS; i++) { 1622 hwif = host->ports[i]; 1623 1624 if (hwif == NULL) { 1625 mate = NULL; 1626 continue; 1627 } 1628 1629 ide_init_port_hw(hwif, hws[i]); 1630 ide_port_apply_params(hwif); 1631 1632 if (d == NULL) { 1633 mate = NULL; 1634 } else { 1635 if ((i & 1) && mate) { 1636 hwif->mate = mate; 1637 mate->mate = hwif; 1638 } 1639 1640 mate = (i & 1) ? NULL : hwif; 1641 1642 ide_init_port(hwif, i & 1, d); 1643 ide_port_cable_detect(hwif); 1644 } 1645 1646 ide_port_init_devices(hwif); 1647 } 1648 1649 for (i = 0; i < MAX_HOST_PORTS; i++) { 1650 hwif = host->ports[i]; 1651 1652 if (hwif == NULL) 1653 continue; 1654 1655 if (ide_probe_port(hwif) == 0) 1656 hwif->present = 1; 1657 1658 if (hwif->chipset != ide_4drives || !hwif->mate || 1659 !hwif->mate->present) 1660 ide_register_port(hwif); 1661 1662 if (hwif->present) 1663 ide_port_tune_devices(hwif); 1664 } 1665 1666 for (i = 0; i < MAX_HOST_PORTS; i++) { 1667 hwif = host->ports[i]; 1668 1669 if (hwif == NULL) 1670 continue; 1671 1672 if (hwif_init(hwif) == 0) { 1673 printk(KERN_INFO "%s: failed to initialize IDE " 1674 "interface\n", hwif->name); 1675 hwif->present = 0; 1676 continue; 1677 } 1678 1679 if (hwif->present) 1680 if (ide_port_setup_devices(hwif) == 0) { 1681 hwif->present = 0; 1682 continue; 1683 } 1684 1685 j++; 1686 1687 ide_acpi_init(hwif); 1688 1689 if (hwif->present) 1690 ide_acpi_port_init_devices(hwif); 1691 } 1692 1693 for (i = 0; i < MAX_HOST_PORTS; i++) { 1694 hwif = host->ports[i]; 1695 1696 if (hwif == NULL) 1697 continue; 1698 1699 if (hwif->chipset == ide_unknown) 1700 hwif->chipset = ide_generic; 1701 1702 if (hwif->present) 1703 hwif_register_devices(hwif); 1704 } 1705 1706 for (i = 0; i < MAX_HOST_PORTS; i++) { 1707 hwif = host->ports[i]; 1708 1709 if (hwif == NULL) 1710 continue; 1711 1712 ide_sysfs_register_port(hwif); 1713 ide_proc_register_port(hwif); 1714 1715 if (hwif->present) 1716 ide_proc_port_register_devices(hwif); 1717 } 1718 1719 return j ? 0 : -1; 1720} 1721EXPORT_SYMBOL_GPL(ide_host_register); 1722 1723int ide_host_add(const struct ide_port_info *d, hw_regs_t **hws, 1724 struct ide_host **hostp) 1725{ 1726 struct ide_host *host; 1727 int rc; 1728 1729 host = ide_host_alloc(d, hws); 1730 if (host == NULL) 1731 return -ENOMEM; 1732 1733 rc = ide_host_register(host, d, hws); 1734 if (rc) { 1735 ide_host_free(host); 1736 return rc; 1737 } 1738 1739 if (hostp) 1740 *hostp = host; 1741 1742 return 0; 1743} 1744EXPORT_SYMBOL_GPL(ide_host_add); 1745 1746void ide_host_free(struct ide_host *host) 1747{ 1748 ide_hwif_t *hwif; 1749 int i; 1750 1751 for (i = 0; i < MAX_HOST_PORTS; i++) { 1752 hwif = host->ports[i]; 1753 1754 if (hwif == NULL) 1755 continue; 1756 1757 ide_free_port_slot(hwif->index); 1758 kfree(hwif); 1759 } 1760 1761 kfree(host); 1762} 1763EXPORT_SYMBOL_GPL(ide_host_free); 1764 1765void ide_host_remove(struct ide_host *host) 1766{ 1767 int i; 1768 1769 for (i = 0; i < MAX_HOST_PORTS; i++) { 1770 if (host->ports[i]) 1771 ide_unregister(host->ports[i]); 1772 } 1773 1774 ide_host_free(host); 1775} 1776EXPORT_SYMBOL_GPL(ide_host_remove); 1777 1778void ide_port_scan(ide_hwif_t *hwif) 1779{ 1780 ide_port_apply_params(hwif); 1781 ide_port_cable_detect(hwif); 1782 ide_port_init_devices(hwif); 1783 1784 if (ide_probe_port(hwif) < 0) 1785 return; 1786 1787 hwif->present = 1; 1788 1789 ide_port_tune_devices(hwif); 1790 ide_acpi_port_init_devices(hwif); 1791 ide_port_setup_devices(hwif); 1792 hwif_register_devices(hwif); 1793 ide_proc_port_register_devices(hwif); 1794} 1795EXPORT_SYMBOL_GPL(ide_port_scan); 1796 1797static void ide_legacy_init_one(hw_regs_t **hws, hw_regs_t *hw, 1798 u8 port_no, const struct ide_port_info *d, 1799 unsigned long config) 1800{ 1801 unsigned long base, ctl; 1802 int irq; 1803 1804 if (port_no == 0) { 1805 base = 0x1f0; 1806 ctl = 0x3f6; 1807 irq = 14; 1808 } else { 1809 base = 0x170; 1810 ctl = 0x376; 1811 irq = 15; 1812 } 1813 1814 if (!request_region(base, 8, d->name)) { 1815 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n", 1816 d->name, base, base + 7); 1817 return; 1818 } 1819 1820 if (!request_region(ctl, 1, d->name)) { 1821 printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n", 1822 d->name, ctl); 1823 release_region(base, 8); 1824 return; 1825 } 1826 1827 ide_std_init_ports(hw, base, ctl); 1828 hw->irq = irq; 1829 hw->chipset = d->chipset; 1830 hw->config = config; 1831 1832 hws[port_no] = hw; 1833} 1834 1835int ide_legacy_device_add(const struct ide_port_info *d, unsigned long config) 1836{ 1837 hw_regs_t hw[2], *hws[] = { NULL, NULL, NULL, NULL }; 1838 1839 memset(&hw, 0, sizeof(hw)); 1840 1841 if ((d->host_flags & IDE_HFLAG_QD_2ND_PORT) == 0) 1842 ide_legacy_init_one(hws, &hw[0], 0, d, config); 1843 ide_legacy_init_one(hws, &hw[1], 1, d, config); 1844 1845 if (hws[0] == NULL && hws[1] == NULL && 1846 (d->host_flags & IDE_HFLAG_SINGLE)) 1847 return -ENOENT; 1848 1849 return ide_host_add(d, hws, NULL); 1850} 1851EXPORT_SYMBOL_GPL(ide_legacy_device_add); 1852