ide-probe.c revision f58c1ab8deebc2360cef998f169a6727c288210f
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 (hwif->host_flags & IDE_HFLAG_BROKEN_ALTSTATUS) == 0) { 271 a = tp_ops->read_altstatus(hwif); 272 s = tp_ops->read_status(hwif); 273 if ((a ^ s) & ~ATA_IDX) 274 /* ancient Seagate drives, broken interfaces */ 275 printk(KERN_INFO "%s: probing with STATUS(0x%02x) " 276 "instead of ALTSTATUS(0x%02x)\n", 277 drive->name, s, a); 278 else 279 /* use non-intrusive polling */ 280 use_altstatus = 1; 281 } 282 283 /* set features register for atapi 284 * identify command to be sure of reply 285 */ 286 if (cmd == ATA_CMD_ID_ATAPI) { 287 ide_task_t task; 288 289 memset(&task, 0, sizeof(task)); 290 /* disable DMA & overlap */ 291 task.tf_flags = IDE_TFLAG_OUT_FEATURE; 292 293 tp_ops->tf_load(drive, &task); 294 } 295 296 /* ask drive for ID */ 297 tp_ops->exec_command(hwif, cmd); 298 299 timeout = ((cmd == ATA_CMD_ID_ATA) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2; 300 301 if (ide_busy_sleep(hwif, timeout, use_altstatus)) 302 return 1; 303 304 /* wait for IRQ and ATA_DRQ */ 305 msleep(50); 306 s = tp_ops->read_status(hwif); 307 308 if (OK_STAT(s, ATA_DRQ, BAD_R_STAT)) { 309 unsigned long flags; 310 311 /* local CPU only; some systems need this */ 312 local_irq_save(flags); 313 /* drive returned ID */ 314 do_identify(drive, cmd); 315 /* drive responded with ID */ 316 rc = 0; 317 /* clear drive IRQ */ 318 (void)tp_ops->read_status(hwif); 319 local_irq_restore(flags); 320 } else { 321 /* drive refused ID */ 322 rc = 2; 323 } 324 return rc; 325} 326 327/** 328 * try_to_identify - try to identify a drive 329 * @drive: drive to probe 330 * @cmd: command to use 331 * 332 * Issue the identify command and then do IRQ probing to 333 * complete the identification when needed by finding the 334 * IRQ the drive is attached to 335 */ 336 337static int try_to_identify (ide_drive_t *drive, u8 cmd) 338{ 339 ide_hwif_t *hwif = HWIF(drive); 340 const struct ide_tp_ops *tp_ops = hwif->tp_ops; 341 int retval; 342 int autoprobe = 0; 343 unsigned long cookie = 0; 344 345 /* 346 * Disable device irq unless we need to 347 * probe for it. Otherwise we'll get spurious 348 * interrupts during the identify-phase that 349 * the irq handler isn't expecting. 350 */ 351 if (hwif->io_ports.ctl_addr) { 352 if (!hwif->irq) { 353 autoprobe = 1; 354 cookie = probe_irq_on(); 355 } 356 tp_ops->set_irq(hwif, autoprobe); 357 } 358 359 retval = actual_try_to_identify(drive, cmd); 360 361 if (autoprobe) { 362 int irq; 363 364 tp_ops->set_irq(hwif, 0); 365 /* clear drive IRQ */ 366 (void)tp_ops->read_status(hwif); 367 udelay(5); 368 irq = probe_irq_off(cookie); 369 if (!hwif->irq) { 370 if (irq > 0) { 371 hwif->irq = irq; 372 } else { 373 /* Mmmm.. multiple IRQs.. 374 * don't know which was ours 375 */ 376 printk(KERN_ERR "%s: IRQ probe failed (0x%lx)\n", 377 drive->name, cookie); 378 } 379 } 380 } 381 return retval; 382} 383 384int ide_busy_sleep(ide_hwif_t *hwif, unsigned long timeout, int altstatus) 385{ 386 u8 stat; 387 388 timeout += jiffies; 389 390 do { 391 msleep(50); /* give drive a breather */ 392 stat = altstatus ? hwif->tp_ops->read_altstatus(hwif) 393 : hwif->tp_ops->read_status(hwif); 394 if ((stat & ATA_BUSY) == 0) 395 return 0; 396 } while (time_before(jiffies, timeout)); 397 398 return 1; /* drive timed-out */ 399} 400 401static u8 ide_read_device(ide_drive_t *drive) 402{ 403 ide_task_t task; 404 405 memset(&task, 0, sizeof(task)); 406 task.tf_flags = IDE_TFLAG_IN_DEVICE; 407 408 drive->hwif->tp_ops->tf_read(drive, &task); 409 410 return task.tf.device; 411} 412 413/** 414 * do_probe - probe an IDE device 415 * @drive: drive to probe 416 * @cmd: command to use 417 * 418 * do_probe() has the difficult job of finding a drive if it exists, 419 * without getting hung up if it doesn't exist, without trampling on 420 * ethernet cards, and without leaving any IRQs dangling to haunt us later. 421 * 422 * If a drive is "known" to exist (from CMOS or kernel parameters), 423 * but does not respond right away, the probe will "hang in there" 424 * for the maximum wait time (about 30 seconds), otherwise it will 425 * exit much more quickly. 426 * 427 * Returns: 0 device was identified 428 * 1 device timed-out (no response to identify request) 429 * 2 device aborted the command (refused to identify itself) 430 * 3 bad status from device (possible for ATAPI drives) 431 * 4 probe was not attempted because failure was obvious 432 */ 433 434static int do_probe (ide_drive_t *drive, u8 cmd) 435{ 436 ide_hwif_t *hwif = HWIF(drive); 437 const struct ide_tp_ops *tp_ops = hwif->tp_ops; 438 int rc; 439 u8 present = !!(drive->dev_flags & IDE_DFLAG_PRESENT), stat; 440 441 /* avoid waiting for inappropriate probes */ 442 if (present && drive->media != ide_disk && cmd == ATA_CMD_ID_ATA) 443 return 4; 444 445#ifdef DEBUG 446 printk(KERN_INFO "probing for %s: present=%d, media=%d, probetype=%s\n", 447 drive->name, present, drive->media, 448 (cmd == ATA_CMD_ID_ATA) ? "ATA" : "ATAPI"); 449#endif 450 451 /* needed for some systems 452 * (e.g. crw9624 as drive0 with disk as slave) 453 */ 454 msleep(50); 455 SELECT_DRIVE(drive); 456 msleep(50); 457 458 if (ide_read_device(drive) != drive->select && present == 0) { 459 if (drive->dn & 1) { 460 /* exit with drive0 selected */ 461 SELECT_DRIVE(&hwif->drives[0]); 462 /* allow ATA_BUSY to assert & clear */ 463 msleep(50); 464 } 465 /* no i/f present: mmm.. this should be a 4 -ml */ 466 return 3; 467 } 468 469 stat = tp_ops->read_status(hwif); 470 471 if (OK_STAT(stat, ATA_DRDY, ATA_BUSY) || 472 present || cmd == ATA_CMD_ID_ATAPI) { 473 /* send cmd and wait */ 474 if ((rc = try_to_identify(drive, cmd))) { 475 /* failed: try again */ 476 rc = try_to_identify(drive,cmd); 477 } 478 479 stat = tp_ops->read_status(hwif); 480 481 if (stat == (ATA_BUSY | ATA_DRDY)) 482 return 4; 483 484 if (rc == 1 && cmd == ATA_CMD_ID_ATAPI) { 485 printk(KERN_ERR "%s: no response (status = 0x%02x), " 486 "resetting drive\n", drive->name, stat); 487 msleep(50); 488 SELECT_DRIVE(drive); 489 msleep(50); 490 tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET); 491 (void)ide_busy_sleep(hwif, WAIT_WORSTCASE, 0); 492 rc = try_to_identify(drive, cmd); 493 } 494 495 /* ensure drive IRQ is clear */ 496 stat = tp_ops->read_status(hwif); 497 498 if (rc == 1) 499 printk(KERN_ERR "%s: no response (status = 0x%02x)\n", 500 drive->name, stat); 501 } else { 502 /* not present or maybe ATAPI */ 503 rc = 3; 504 } 505 if (drive->dn & 1) { 506 /* exit with drive0 selected */ 507 SELECT_DRIVE(&hwif->drives[0]); 508 msleep(50); 509 /* ensure drive irq is clear */ 510 (void)tp_ops->read_status(hwif); 511 } 512 return rc; 513} 514 515/* 516 * 517 */ 518static void enable_nest (ide_drive_t *drive) 519{ 520 ide_hwif_t *hwif = HWIF(drive); 521 const struct ide_tp_ops *tp_ops = hwif->tp_ops; 522 u8 stat; 523 524 printk(KERN_INFO "%s: enabling %s -- ", 525 hwif->name, (char *)&drive->id[ATA_ID_PROD]); 526 527 SELECT_DRIVE(drive); 528 msleep(50); 529 tp_ops->exec_command(hwif, ATA_EXABYTE_ENABLE_NEST); 530 531 if (ide_busy_sleep(hwif, WAIT_WORSTCASE, 0)) { 532 printk(KERN_CONT "failed (timeout)\n"); 533 return; 534 } 535 536 msleep(50); 537 538 stat = tp_ops->read_status(hwif); 539 540 if (!OK_STAT(stat, 0, BAD_STAT)) 541 printk(KERN_CONT "failed (status = 0x%02x)\n", stat); 542 else 543 printk(KERN_CONT "success\n"); 544} 545 546/** 547 * probe_for_drives - upper level drive probe 548 * @drive: drive to probe for 549 * 550 * probe_for_drive() tests for existence of a given drive using do_probe() 551 * and presents things to the user as needed. 552 * 553 * Returns: 0 no device was found 554 * 1 device was found 555 * (note: IDE_DFLAG_PRESENT might still be not set) 556 */ 557 558static inline u8 probe_for_drive (ide_drive_t *drive) 559{ 560 char *m; 561 562 /* 563 * In order to keep things simple we have an id 564 * block for all drives at all times. If the device 565 * is pre ATA or refuses ATA/ATAPI identify we 566 * will add faked data to this. 567 * 568 * Also note that 0 everywhere means "can't do X" 569 */ 570 571 drive->dev_flags &= ~IDE_DFLAG_ID_READ; 572 573 drive->id = kzalloc(SECTOR_SIZE, GFP_KERNEL); 574 if (drive->id == NULL) { 575 printk(KERN_ERR "ide: out of memory for id data.\n"); 576 return 0; 577 } 578 579 m = (char *)&drive->id[ATA_ID_PROD]; 580 strcpy(m, "UNKNOWN"); 581 582 /* skip probing? */ 583 if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0) { 584retry: 585 /* if !(success||timed-out) */ 586 if (do_probe(drive, ATA_CMD_ID_ATA) >= 2) 587 /* look for ATAPI device */ 588 (void)do_probe(drive, ATA_CMD_ID_ATAPI); 589 590 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) 591 /* drive not found */ 592 return 0; 593 594 if (strstr(m, "E X A B Y T E N E S T")) { 595 enable_nest(drive); 596 goto retry; 597 } 598 599 /* identification failed? */ 600 if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) { 601 if (drive->media == ide_disk) { 602 printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n", 603 drive->name, drive->cyl, 604 drive->head, drive->sect); 605 } else if (drive->media == ide_cdrom) { 606 printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name); 607 } else { 608 /* nuke it */ 609 printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name); 610 drive->dev_flags &= ~IDE_DFLAG_PRESENT; 611 } 612 } 613 /* drive was found */ 614 } 615 616 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) 617 return 0; 618 619 /* The drive wasn't being helpful. Add generic info only */ 620 if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) { 621 generic_id(drive); 622 return 1; 623 } 624 625 if (drive->media == ide_disk) { 626 ide_disk_init_chs(drive); 627 ide_disk_init_mult_count(drive); 628 } 629 630 return !!(drive->dev_flags & IDE_DFLAG_PRESENT); 631} 632 633static void hwif_release_dev(struct device *dev) 634{ 635 ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev); 636 637 complete(&hwif->gendev_rel_comp); 638} 639 640static int ide_register_port(ide_hwif_t *hwif) 641{ 642 int ret; 643 644 /* register with global device tree */ 645 strlcpy(hwif->gendev.bus_id,hwif->name,BUS_ID_SIZE); 646 hwif->gendev.driver_data = hwif; 647 if (hwif->gendev.parent == NULL) { 648 if (hwif->dev) 649 hwif->gendev.parent = hwif->dev; 650 else 651 /* Would like to do = &device_legacy */ 652 hwif->gendev.parent = NULL; 653 } 654 hwif->gendev.release = hwif_release_dev; 655 ret = device_register(&hwif->gendev); 656 if (ret < 0) { 657 printk(KERN_WARNING "IDE: %s: device_register error: %d\n", 658 __func__, ret); 659 goto out; 660 } 661 662 hwif->portdev = device_create(ide_port_class, &hwif->gendev, 663 MKDEV(0, 0), hwif, hwif->name); 664 if (IS_ERR(hwif->portdev)) { 665 ret = PTR_ERR(hwif->portdev); 666 device_unregister(&hwif->gendev); 667 } 668out: 669 return ret; 670} 671 672/** 673 * ide_port_wait_ready - wait for port to become ready 674 * @hwif: IDE port 675 * 676 * This is needed on some PPCs and a bunch of BIOS-less embedded 677 * platforms. Typical cases are: 678 * 679 * - The firmware hard reset the disk before booting the kernel, 680 * the drive is still doing it's poweron-reset sequence, that 681 * can take up to 30 seconds. 682 * 683 * - The firmware does nothing (or no firmware), the device is 684 * still in POST state (same as above actually). 685 * 686 * - Some CD/DVD/Writer combo drives tend to drive the bus during 687 * their reset sequence even when they are non-selected slave 688 * devices, thus preventing discovery of the main HD. 689 * 690 * Doing this wait-for-non-busy should not harm any existing 691 * configuration and fix some issues like the above. 692 * 693 * BenH. 694 * 695 * Returns 0 on success, error code (< 0) otherwise. 696 */ 697 698static int ide_port_wait_ready(ide_hwif_t *hwif) 699{ 700 int unit, rc; 701 702 printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name); 703 704 /* Let HW settle down a bit from whatever init state we 705 * come from */ 706 mdelay(2); 707 708 /* Wait for BSY bit to go away, spec timeout is 30 seconds, 709 * I know of at least one disk who takes 31 seconds, I use 35 710 * here to be safe 711 */ 712 rc = ide_wait_not_busy(hwif, 35000); 713 if (rc) 714 return rc; 715 716 /* Now make sure both master & slave are ready */ 717 for (unit = 0; unit < MAX_DRIVES; unit++) { 718 ide_drive_t *drive = &hwif->drives[unit]; 719 720 /* Ignore disks that we will not probe for later. */ 721 if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0 || 722 (drive->dev_flags & IDE_DFLAG_PRESENT)) { 723 SELECT_DRIVE(drive); 724 hwif->tp_ops->set_irq(hwif, 1); 725 mdelay(2); 726 rc = ide_wait_not_busy(hwif, 35000); 727 if (rc) 728 goto out; 729 } else 730 printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n", 731 drive->name); 732 } 733out: 734 /* Exit function with master reselected (let's be sane) */ 735 if (unit) 736 SELECT_DRIVE(&hwif->drives[0]); 737 738 return rc; 739} 740 741/** 742 * ide_undecoded_slave - look for bad CF adapters 743 * @dev1: slave device 744 * 745 * Analyse the drives on the interface and attempt to decide if we 746 * have the same drive viewed twice. This occurs with crap CF adapters 747 * and PCMCIA sometimes. 748 */ 749 750void ide_undecoded_slave(ide_drive_t *dev1) 751{ 752 ide_drive_t *dev0 = &dev1->hwif->drives[0]; 753 754 if ((dev1->dn & 1) == 0 || (dev0->dev_flags & IDE_DFLAG_PRESENT) == 0) 755 return; 756 757 /* If the models don't match they are not the same product */ 758 if (strcmp((char *)&dev0->id[ATA_ID_PROD], 759 (char *)&dev1->id[ATA_ID_PROD])) 760 return; 761 762 /* Serial numbers do not match */ 763 if (strncmp((char *)&dev0->id[ATA_ID_SERNO], 764 (char *)&dev1->id[ATA_ID_SERNO], ATA_ID_SERNO_LEN)) 765 return; 766 767 /* No serial number, thankfully very rare for CF */ 768 if (*(char *)&dev0->id[ATA_ID_SERNO] == 0) 769 return; 770 771 /* Appears to be an IDE flash adapter with decode bugs */ 772 printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n"); 773 774 dev1->dev_flags &= ~IDE_DFLAG_PRESENT; 775} 776 777EXPORT_SYMBOL_GPL(ide_undecoded_slave); 778 779static int ide_probe_port(ide_hwif_t *hwif) 780{ 781 unsigned long flags; 782 unsigned int irqd; 783 int unit, rc = -ENODEV; 784 785 BUG_ON(hwif->present); 786 787 if ((hwif->drives[0].dev_flags & IDE_DFLAG_NOPROBE) && 788 (hwif->drives[1].dev_flags & IDE_DFLAG_NOPROBE)) 789 return -EACCES; 790 791 /* 792 * We must always disable IRQ, as probe_for_drive will assert IRQ, but 793 * we'll install our IRQ driver much later... 794 */ 795 irqd = hwif->irq; 796 if (irqd) 797 disable_irq(hwif->irq); 798 799 local_irq_set(flags); 800 801 if (ide_port_wait_ready(hwif) == -EBUSY) 802 printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name); 803 804 /* 805 * Second drive should only exist if first drive was found, 806 * but a lot of cdrom drives are configured as single slaves. 807 */ 808 for (unit = 0; unit < MAX_DRIVES; ++unit) { 809 ide_drive_t *drive = &hwif->drives[unit]; 810 811 (void) probe_for_drive(drive); 812 if (drive->dev_flags & IDE_DFLAG_PRESENT) 813 rc = 0; 814 } 815 816 local_irq_restore(flags); 817 818 /* 819 * Use cached IRQ number. It might be (and is...) changed by probe 820 * code above 821 */ 822 if (irqd) 823 enable_irq(irqd); 824 825 return rc; 826} 827 828static void ide_port_tune_devices(ide_hwif_t *hwif) 829{ 830 const struct ide_port_ops *port_ops = hwif->port_ops; 831 int unit; 832 833 for (unit = 0; unit < MAX_DRIVES; unit++) { 834 ide_drive_t *drive = &hwif->drives[unit]; 835 836 if (drive->dev_flags & IDE_DFLAG_PRESENT) { 837 if (port_ops && port_ops->quirkproc) 838 port_ops->quirkproc(drive); 839 } 840 } 841 842 for (unit = 0; unit < MAX_DRIVES; ++unit) { 843 ide_drive_t *drive = &hwif->drives[unit]; 844 845 if (drive->dev_flags & IDE_DFLAG_PRESENT) { 846 ide_set_max_pio(drive); 847 848 drive->dev_flags |= IDE_DFLAG_NICE1; 849 850 if (hwif->dma_ops) 851 ide_set_dma(drive); 852 } 853 } 854 855 for (unit = 0; unit < MAX_DRIVES; ++unit) { 856 ide_drive_t *drive = &hwif->drives[unit]; 857 858 if ((hwif->host_flags & IDE_HFLAG_NO_IO_32BIT) || 859 drive->id[ATA_ID_DWORD_IO]) 860 drive->dev_flags |= IDE_DFLAG_NO_IO_32BIT; 861 else 862 drive->dev_flags &= ~IDE_DFLAG_NO_IO_32BIT; 863 } 864} 865 866/* 867 * save_match() is used to simplify logic in init_irq() below. 868 * 869 * A loophole here is that we may not know about a particular 870 * hwif's irq until after that hwif is actually probed/initialized.. 871 * This could be a problem for the case where an hwif is on a 872 * dual interface that requires serialization (eg. cmd640) and another 873 * hwif using one of the same irqs is initialized beforehand. 874 * 875 * This routine detects and reports such situations, but does not fix them. 876 */ 877static void save_match(ide_hwif_t *hwif, ide_hwif_t *new, ide_hwif_t **match) 878{ 879 ide_hwif_t *m = *match; 880 881 if (m && m->hwgroup && m->hwgroup != new->hwgroup) { 882 if (!new->hwgroup) 883 return; 884 printk(KERN_WARNING "%s: potential IRQ problem with %s and %s\n", 885 hwif->name, new->name, m->name); 886 } 887 if (!m || m->irq != hwif->irq) /* don't undo a prior perfect match */ 888 *match = new; 889} 890 891/* 892 * init request queue 893 */ 894static int ide_init_queue(ide_drive_t *drive) 895{ 896 struct request_queue *q; 897 ide_hwif_t *hwif = HWIF(drive); 898 int max_sectors = 256; 899 int max_sg_entries = PRD_ENTRIES; 900 901 /* 902 * Our default set up assumes the normal IDE case, 903 * that is 64K segmenting, standard PRD setup 904 * and LBA28. Some drivers then impose their own 905 * limits and LBA48 we could raise it but as yet 906 * do not. 907 */ 908 909 q = blk_init_queue_node(do_ide_request, &hwif->hwgroup->lock, 910 hwif_to_node(hwif)); 911 if (!q) 912 return 1; 913 914 q->queuedata = drive; 915 blk_queue_segment_boundary(q, 0xffff); 916 917 if (hwif->rqsize < max_sectors) 918 max_sectors = hwif->rqsize; 919 blk_queue_max_sectors(q, max_sectors); 920 921#ifdef CONFIG_PCI 922 /* When we have an IOMMU, we may have a problem where pci_map_sg() 923 * creates segments that don't completely match our boundary 924 * requirements and thus need to be broken up again. Because it 925 * doesn't align properly either, we may actually have to break up 926 * to more segments than what was we got in the first place, a max 927 * worst case is twice as many. 928 * This will be fixed once we teach pci_map_sg() about our boundary 929 * requirements, hopefully soon. *FIXME* 930 */ 931 if (!PCI_DMA_BUS_IS_PHYS) 932 max_sg_entries >>= 1; 933#endif /* CONFIG_PCI */ 934 935 blk_queue_max_hw_segments(q, max_sg_entries); 936 blk_queue_max_phys_segments(q, max_sg_entries); 937 938 /* assign drive queue */ 939 drive->queue = q; 940 941 /* needs drive->queue to be set */ 942 ide_toggle_bounce(drive, 1); 943 944 return 0; 945} 946 947static void ide_add_drive_to_hwgroup(ide_drive_t *drive) 948{ 949 ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; 950 951 spin_lock_irq(&hwgroup->lock); 952 if (!hwgroup->drive) { 953 /* first drive for hwgroup. */ 954 drive->next = drive; 955 hwgroup->drive = drive; 956 hwgroup->hwif = HWIF(hwgroup->drive); 957 } else { 958 drive->next = hwgroup->drive->next; 959 hwgroup->drive->next = drive; 960 } 961 spin_unlock_irq(&hwgroup->lock); 962} 963 964/* 965 * For any present drive: 966 * - allocate the block device queue 967 * - link drive into the hwgroup 968 */ 969static int ide_port_setup_devices(ide_hwif_t *hwif) 970{ 971 int i, j = 0; 972 973 mutex_lock(&ide_cfg_mtx); 974 for (i = 0; i < MAX_DRIVES; i++) { 975 ide_drive_t *drive = &hwif->drives[i]; 976 977 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) 978 continue; 979 980 if (ide_init_queue(drive)) { 981 printk(KERN_ERR "ide: failed to init %s\n", 982 drive->name); 983 kfree(drive->id); 984 drive->id = NULL; 985 drive->dev_flags &= ~IDE_DFLAG_PRESENT; 986 continue; 987 } 988 989 j++; 990 991 ide_add_drive_to_hwgroup(drive); 992 } 993 mutex_unlock(&ide_cfg_mtx); 994 995 return j; 996} 997 998static ide_hwif_t *ide_ports[MAX_HWIFS]; 999 1000void ide_remove_port_from_hwgroup(ide_hwif_t *hwif) 1001{ 1002 ide_hwgroup_t *hwgroup = hwif->hwgroup; 1003 1004 ide_ports[hwif->index] = NULL; 1005 1006 spin_lock_irq(&hwgroup->lock); 1007 /* 1008 * Remove us from the hwgroup, and free 1009 * the hwgroup if we were the only member 1010 */ 1011 if (hwif->next == hwif) { 1012 BUG_ON(hwgroup->hwif != hwif); 1013 kfree(hwgroup); 1014 } else { 1015 /* There is another interface in hwgroup. 1016 * Unlink us, and set hwgroup->drive and ->hwif to 1017 * something sane. 1018 */ 1019 ide_hwif_t *g = hwgroup->hwif; 1020 1021 while (g->next != hwif) 1022 g = g->next; 1023 g->next = hwif->next; 1024 if (hwgroup->hwif == hwif) { 1025 /* Chose a random hwif for hwgroup->hwif. 1026 * It's guaranteed that there are no drives 1027 * left in the hwgroup. 1028 */ 1029 BUG_ON(hwgroup->drive != NULL); 1030 hwgroup->hwif = g; 1031 } 1032 BUG_ON(hwgroup->hwif == hwif); 1033 } 1034 spin_unlock_irq(&hwgroup->lock); 1035} 1036 1037/* 1038 * This routine sets up the irq for an ide interface, and creates a new 1039 * hwgroup for the irq/hwif if none was previously assigned. 1040 * 1041 * Much of the code is for correctly detecting/handling irq sharing 1042 * and irq serialization situations. This is somewhat complex because 1043 * it handles static as well as dynamic (PCMCIA) IDE interfaces. 1044 */ 1045static int init_irq (ide_hwif_t *hwif) 1046{ 1047 struct ide_io_ports *io_ports = &hwif->io_ports; 1048 unsigned int index; 1049 ide_hwgroup_t *hwgroup; 1050 ide_hwif_t *match = NULL; 1051 1052 mutex_lock(&ide_cfg_mtx); 1053 hwif->hwgroup = NULL; 1054 1055 /* 1056 * Group up with any other hwifs that share our irq(s). 1057 */ 1058 for (index = 0; index < MAX_HWIFS; index++) { 1059 ide_hwif_t *h = ide_ports[index]; 1060 1061 if (h && h->hwgroup) { /* scan only initialized ports */ 1062 if (hwif->irq == h->irq) { 1063 if (hwif->chipset != ide_pci || 1064 h->chipset != ide_pci) { 1065 save_match(hwif, h, &match); 1066 } 1067 } 1068 if (hwif->serialized) { 1069 if (hwif->mate && hwif->mate->irq == h->irq) 1070 save_match(hwif, h, &match); 1071 } 1072 if (h->serialized) { 1073 if (h->mate && hwif->irq == h->mate->irq) 1074 save_match(hwif, h, &match); 1075 } 1076 } 1077 } 1078 1079 /* 1080 * If we are still without a hwgroup, then form a new one 1081 */ 1082 if (match) { 1083 hwgroup = match->hwgroup; 1084 hwif->hwgroup = hwgroup; 1085 /* 1086 * Link us into the hwgroup. 1087 * This must be done early, do ensure that unexpected_intr 1088 * can find the hwif and prevent irq storms. 1089 * No drives are attached to the new hwif, choose_drive 1090 * can't do anything stupid (yet). 1091 * Add ourself as the 2nd entry to the hwgroup->hwif 1092 * linked list, the first entry is the hwif that owns 1093 * hwgroup->handler - do not change that. 1094 */ 1095 spin_lock_irq(&hwgroup->lock); 1096 hwif->next = hwgroup->hwif->next; 1097 hwgroup->hwif->next = hwif; 1098 BUG_ON(hwif->next == hwif); 1099 spin_unlock_irq(&hwgroup->lock); 1100 } else { 1101 hwgroup = kmalloc_node(sizeof(*hwgroup), GFP_KERNEL|__GFP_ZERO, 1102 hwif_to_node(hwif)); 1103 if (hwgroup == NULL) 1104 goto out_up; 1105 1106 spin_lock_init(&hwgroup->lock); 1107 1108 hwif->hwgroup = hwgroup; 1109 hwgroup->hwif = hwif->next = hwif; 1110 1111 init_timer(&hwgroup->timer); 1112 hwgroup->timer.function = &ide_timer_expiry; 1113 hwgroup->timer.data = (unsigned long) hwgroup; 1114 } 1115 1116 ide_ports[hwif->index] = hwif; 1117 1118 /* 1119 * Allocate the irq, if not already obtained for another hwif 1120 */ 1121 if (!match || match->irq != hwif->irq) { 1122 int sa = 0; 1123#if defined(__mc68000__) 1124 sa = IRQF_SHARED; 1125#endif /* __mc68000__ */ 1126 1127 if (hwif->chipset == ide_pci) 1128 sa = IRQF_SHARED; 1129 1130 if (io_ports->ctl_addr) 1131 hwif->tp_ops->set_irq(hwif, 1); 1132 1133 if (request_irq(hwif->irq,&ide_intr,sa,hwif->name,hwgroup)) 1134 goto out_unlink; 1135 } 1136 1137 if (!hwif->rqsize) { 1138 if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) || 1139 (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA)) 1140 hwif->rqsize = 256; 1141 else 1142 hwif->rqsize = 65536; 1143 } 1144 1145#if !defined(__mc68000__) 1146 printk(KERN_INFO "%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name, 1147 io_ports->data_addr, io_ports->status_addr, 1148 io_ports->ctl_addr, hwif->irq); 1149#else 1150 printk(KERN_INFO "%s at 0x%08lx on irq %d", hwif->name, 1151 io_ports->data_addr, hwif->irq); 1152#endif /* __mc68000__ */ 1153 if (match) 1154 printk(KERN_CONT " (serialized with %s)", match->name); 1155 printk(KERN_CONT "\n"); 1156 1157 mutex_unlock(&ide_cfg_mtx); 1158 return 0; 1159out_unlink: 1160 ide_remove_port_from_hwgroup(hwif); 1161out_up: 1162 mutex_unlock(&ide_cfg_mtx); 1163 return 1; 1164} 1165 1166static int ata_lock(dev_t dev, void *data) 1167{ 1168 /* FIXME: we want to pin hwif down */ 1169 return 0; 1170} 1171 1172static struct kobject *ata_probe(dev_t dev, int *part, void *data) 1173{ 1174 ide_hwif_t *hwif = data; 1175 int unit = *part >> PARTN_BITS; 1176 ide_drive_t *drive = &hwif->drives[unit]; 1177 1178 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) 1179 return NULL; 1180 1181 if (drive->media == ide_disk) 1182 request_module("ide-disk"); 1183 if (drive->dev_flags & IDE_DFLAG_SCSI) 1184 request_module("ide-scsi"); 1185 if (drive->media == ide_cdrom || drive->media == ide_optical) 1186 request_module("ide-cd"); 1187 if (drive->media == ide_tape) 1188 request_module("ide-tape"); 1189 if (drive->media == ide_floppy) 1190 request_module("ide-floppy"); 1191 1192 return NULL; 1193} 1194 1195static struct kobject *exact_match(dev_t dev, int *part, void *data) 1196{ 1197 struct gendisk *p = data; 1198 *part &= (1 << PARTN_BITS) - 1; 1199 return &disk_to_dev(p)->kobj; 1200} 1201 1202static int exact_lock(dev_t dev, void *data) 1203{ 1204 struct gendisk *p = data; 1205 1206 if (!get_disk(p)) 1207 return -1; 1208 return 0; 1209} 1210 1211void ide_register_region(struct gendisk *disk) 1212{ 1213 blk_register_region(MKDEV(disk->major, disk->first_minor), 1214 disk->minors, NULL, exact_match, exact_lock, disk); 1215} 1216 1217EXPORT_SYMBOL_GPL(ide_register_region); 1218 1219void ide_unregister_region(struct gendisk *disk) 1220{ 1221 blk_unregister_region(MKDEV(disk->major, disk->first_minor), 1222 disk->minors); 1223} 1224 1225EXPORT_SYMBOL_GPL(ide_unregister_region); 1226 1227void ide_init_disk(struct gendisk *disk, ide_drive_t *drive) 1228{ 1229 ide_hwif_t *hwif = drive->hwif; 1230 unsigned int unit = drive->dn & 1; 1231 1232 disk->major = hwif->major; 1233 disk->first_minor = unit << PARTN_BITS; 1234 sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit); 1235 disk->queue = drive->queue; 1236} 1237 1238EXPORT_SYMBOL_GPL(ide_init_disk); 1239 1240static void ide_remove_drive_from_hwgroup(ide_drive_t *drive) 1241{ 1242 ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; 1243 1244 if (drive == drive->next) { 1245 /* special case: last drive from hwgroup. */ 1246 BUG_ON(hwgroup->drive != drive); 1247 hwgroup->drive = NULL; 1248 } else { 1249 ide_drive_t *walk; 1250 1251 walk = hwgroup->drive; 1252 while (walk->next != drive) 1253 walk = walk->next; 1254 walk->next = drive->next; 1255 if (hwgroup->drive == drive) { 1256 hwgroup->drive = drive->next; 1257 hwgroup->hwif = hwgroup->drive->hwif; 1258 } 1259 } 1260 BUG_ON(hwgroup->drive == drive); 1261} 1262 1263static void drive_release_dev (struct device *dev) 1264{ 1265 ide_drive_t *drive = container_of(dev, ide_drive_t, gendev); 1266 ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; 1267 1268 ide_proc_unregister_device(drive); 1269 1270 spin_lock_irq(&hwgroup->lock); 1271 ide_remove_drive_from_hwgroup(drive); 1272 kfree(drive->id); 1273 drive->id = NULL; 1274 drive->dev_flags &= ~IDE_DFLAG_PRESENT; 1275 /* Messed up locking ... */ 1276 spin_unlock_irq(&hwgroup->lock); 1277 blk_cleanup_queue(drive->queue); 1278 spin_lock_irq(&hwgroup->lock); 1279 drive->queue = NULL; 1280 spin_unlock_irq(&hwgroup->lock); 1281 1282 complete(&drive->gendev_rel_comp); 1283} 1284 1285static int hwif_init(ide_hwif_t *hwif) 1286{ 1287 int old_irq; 1288 1289 if (!hwif->irq) { 1290 hwif->irq = __ide_default_irq(hwif->io_ports.data_addr); 1291 if (!hwif->irq) { 1292 printk(KERN_ERR "%s: disabled, no IRQ\n", hwif->name); 1293 return 0; 1294 } 1295 } 1296 1297 if (register_blkdev(hwif->major, hwif->name)) 1298 return 0; 1299 1300 if (!hwif->sg_max_nents) 1301 hwif->sg_max_nents = PRD_ENTRIES; 1302 1303 hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents, 1304 GFP_KERNEL); 1305 if (!hwif->sg_table) { 1306 printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name); 1307 goto out; 1308 } 1309 1310 sg_init_table(hwif->sg_table, hwif->sg_max_nents); 1311 1312 if (init_irq(hwif) == 0) 1313 goto done; 1314 1315 old_irq = hwif->irq; 1316 /* 1317 * It failed to initialise. Find the default IRQ for 1318 * this port and try that. 1319 */ 1320 hwif->irq = __ide_default_irq(hwif->io_ports.data_addr); 1321 if (!hwif->irq) { 1322 printk(KERN_ERR "%s: disabled, unable to get IRQ %d\n", 1323 hwif->name, old_irq); 1324 goto out; 1325 } 1326 if (init_irq(hwif)) { 1327 printk(KERN_ERR "%s: probed IRQ %d and default IRQ %d failed\n", 1328 hwif->name, old_irq, hwif->irq); 1329 goto out; 1330 } 1331 printk(KERN_WARNING "%s: probed IRQ %d failed, using default\n", 1332 hwif->name, hwif->irq); 1333 1334done: 1335 blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS, 1336 THIS_MODULE, ata_probe, ata_lock, hwif); 1337 return 1; 1338 1339out: 1340 unregister_blkdev(hwif->major, hwif->name); 1341 return 0; 1342} 1343 1344static void hwif_register_devices(ide_hwif_t *hwif) 1345{ 1346 unsigned int i; 1347 1348 for (i = 0; i < MAX_DRIVES; i++) { 1349 ide_drive_t *drive = &hwif->drives[i]; 1350 struct device *dev = &drive->gendev; 1351 int ret; 1352 1353 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) 1354 continue; 1355 1356 snprintf(dev->bus_id, BUS_ID_SIZE, "%u.%u", hwif->index, i); 1357 dev->parent = &hwif->gendev; 1358 dev->bus = &ide_bus_type; 1359 dev->driver_data = drive; 1360 dev->release = drive_release_dev; 1361 1362 ret = device_register(dev); 1363 if (ret < 0) 1364 printk(KERN_WARNING "IDE: %s: device_register error: " 1365 "%d\n", __func__, ret); 1366 } 1367} 1368 1369static void ide_port_init_devices(ide_hwif_t *hwif) 1370{ 1371 const struct ide_port_ops *port_ops = hwif->port_ops; 1372 int i; 1373 1374 for (i = 0; i < MAX_DRIVES; i++) { 1375 ide_drive_t *drive = &hwif->drives[i]; 1376 1377 drive->dn = i + hwif->channel * 2; 1378 1379 if (hwif->host_flags & IDE_HFLAG_IO_32BIT) 1380 drive->io_32bit = 1; 1381 if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS) 1382 drive->dev_flags |= IDE_DFLAG_UNMASK; 1383 if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS) 1384 drive->dev_flags |= IDE_DFLAG_NO_UNMASK; 1385 1386 if (port_ops && port_ops->init_dev) 1387 port_ops->init_dev(drive); 1388 } 1389} 1390 1391static void ide_init_port(ide_hwif_t *hwif, unsigned int port, 1392 const struct ide_port_info *d) 1393{ 1394 hwif->channel = port; 1395 1396 if (d->chipset) 1397 hwif->chipset = d->chipset; 1398 1399 if (d->init_iops) 1400 d->init_iops(hwif); 1401 1402 if ((!hwif->irq && (d->host_flags & IDE_HFLAG_LEGACY_IRQS)) || 1403 (d->host_flags & IDE_HFLAG_FORCE_LEGACY_IRQS)) 1404 hwif->irq = port ? 15 : 14; 1405 1406 /* ->host_flags may be set by ->init_iops (or even earlier...) */ 1407 hwif->host_flags |= d->host_flags; 1408 hwif->pio_mask = d->pio_mask; 1409 1410 if (d->tp_ops) 1411 hwif->tp_ops = d->tp_ops; 1412 1413 /* ->set_pio_mode for DTC2278 is currently limited to port 0 */ 1414 if (hwif->chipset != ide_dtc2278 || hwif->channel == 0) 1415 hwif->port_ops = d->port_ops; 1416 1417 hwif->swdma_mask = d->swdma_mask; 1418 hwif->mwdma_mask = d->mwdma_mask; 1419 hwif->ultra_mask = d->udma_mask; 1420 1421 if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) { 1422 int rc; 1423 1424 if (d->init_dma) 1425 rc = d->init_dma(hwif, d); 1426 else 1427 rc = ide_hwif_setup_dma(hwif, d); 1428 1429 if (rc < 0) { 1430 printk(KERN_INFO "%s: DMA disabled\n", hwif->name); 1431 hwif->dma_base = 0; 1432 hwif->swdma_mask = 0; 1433 hwif->mwdma_mask = 0; 1434 hwif->ultra_mask = 0; 1435 } else if (d->dma_ops) 1436 hwif->dma_ops = d->dma_ops; 1437 } 1438 1439 if ((d->host_flags & IDE_HFLAG_SERIALIZE) || 1440 ((d->host_flags & IDE_HFLAG_SERIALIZE_DMA) && hwif->dma_base)) { 1441 if (hwif->mate) 1442 hwif->mate->serialized = hwif->serialized = 1; 1443 } 1444 1445 if (d->host_flags & IDE_HFLAG_RQSIZE_256) 1446 hwif->rqsize = 256; 1447 1448 /* call chipset specific routine for each enabled port */ 1449 if (d->init_hwif) 1450 d->init_hwif(hwif); 1451} 1452 1453static void ide_port_cable_detect(ide_hwif_t *hwif) 1454{ 1455 const struct ide_port_ops *port_ops = hwif->port_ops; 1456 1457 if (port_ops && port_ops->cable_detect && (hwif->ultra_mask & 0x78)) { 1458 if (hwif->cbl != ATA_CBL_PATA40_SHORT) 1459 hwif->cbl = port_ops->cable_detect(hwif); 1460 } 1461} 1462 1463static ssize_t store_delete_devices(struct device *portdev, 1464 struct device_attribute *attr, 1465 const char *buf, size_t n) 1466{ 1467 ide_hwif_t *hwif = dev_get_drvdata(portdev); 1468 1469 if (strncmp(buf, "1", n)) 1470 return -EINVAL; 1471 1472 ide_port_unregister_devices(hwif); 1473 1474 return n; 1475}; 1476 1477static DEVICE_ATTR(delete_devices, S_IWUSR, NULL, store_delete_devices); 1478 1479static ssize_t store_scan(struct device *portdev, 1480 struct device_attribute *attr, 1481 const char *buf, size_t n) 1482{ 1483 ide_hwif_t *hwif = dev_get_drvdata(portdev); 1484 1485 if (strncmp(buf, "1", n)) 1486 return -EINVAL; 1487 1488 ide_port_unregister_devices(hwif); 1489 ide_port_scan(hwif); 1490 1491 return n; 1492}; 1493 1494static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan); 1495 1496static struct device_attribute *ide_port_attrs[] = { 1497 &dev_attr_delete_devices, 1498 &dev_attr_scan, 1499 NULL 1500}; 1501 1502static int ide_sysfs_register_port(ide_hwif_t *hwif) 1503{ 1504 int i, uninitialized_var(rc); 1505 1506 for (i = 0; ide_port_attrs[i]; i++) { 1507 rc = device_create_file(hwif->portdev, ide_port_attrs[i]); 1508 if (rc) 1509 break; 1510 } 1511 1512 return rc; 1513} 1514 1515static unsigned int ide_indexes; 1516 1517/** 1518 * ide_find_port_slot - find free port slot 1519 * @d: IDE port info 1520 * 1521 * Return the new port slot index or -ENOENT if we are out of free slots. 1522 */ 1523 1524static int ide_find_port_slot(const struct ide_port_info *d) 1525{ 1526 int idx = -ENOENT; 1527 u8 bootable = (d && (d->host_flags & IDE_HFLAG_NON_BOOTABLE)) ? 0 : 1; 1528 u8 i = (d && (d->host_flags & IDE_HFLAG_QD_2ND_PORT)) ? 1 : 0;; 1529 1530 /* 1531 * Claim an unassigned slot. 1532 * 1533 * Give preference to claiming other slots before claiming ide0/ide1, 1534 * just in case there's another interface yet-to-be-scanned 1535 * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults). 1536 * 1537 * Unless there is a bootable card that does not use the standard 1538 * ports 0x1f0/0x170 (the ide0/ide1 defaults). 1539 */ 1540 mutex_lock(&ide_cfg_mtx); 1541 if (bootable) { 1542 if ((ide_indexes | i) != (1 << MAX_HWIFS) - 1) 1543 idx = ffz(ide_indexes | i); 1544 } else { 1545 if ((ide_indexes | 3) != (1 << MAX_HWIFS) - 1) 1546 idx = ffz(ide_indexes | 3); 1547 else if ((ide_indexes & 3) != 3) 1548 idx = ffz(ide_indexes); 1549 } 1550 if (idx >= 0) 1551 ide_indexes |= (1 << idx); 1552 mutex_unlock(&ide_cfg_mtx); 1553 1554 return idx; 1555} 1556 1557static void ide_free_port_slot(int idx) 1558{ 1559 mutex_lock(&ide_cfg_mtx); 1560 ide_indexes &= ~(1 << idx); 1561 mutex_unlock(&ide_cfg_mtx); 1562} 1563 1564struct ide_host *ide_host_alloc(const struct ide_port_info *d, hw_regs_t **hws) 1565{ 1566 struct ide_host *host; 1567 int i; 1568 1569 host = kzalloc(sizeof(*host), GFP_KERNEL); 1570 if (host == NULL) 1571 return NULL; 1572 1573 for (i = 0; i < MAX_HOST_PORTS; i++) { 1574 ide_hwif_t *hwif; 1575 int idx; 1576 1577 if (hws[i] == NULL) 1578 continue; 1579 1580 hwif = kzalloc(sizeof(*hwif), GFP_KERNEL); 1581 if (hwif == NULL) 1582 continue; 1583 1584 idx = ide_find_port_slot(d); 1585 if (idx < 0) { 1586 printk(KERN_ERR "%s: no free slot for interface\n", 1587 d ? d->name : "ide"); 1588 kfree(hwif); 1589 continue; 1590 } 1591 1592 ide_init_port_data(hwif, idx); 1593 1594 hwif->host = host; 1595 1596 host->ports[i] = hwif; 1597 host->n_ports++; 1598 } 1599 1600 if (host->n_ports == 0) { 1601 kfree(host); 1602 return NULL; 1603 } 1604 1605 if (hws[0]) 1606 host->dev[0] = hws[0]->dev; 1607 1608 if (d) { 1609 host->init_chipset = d->init_chipset; 1610 host->host_flags = d->host_flags; 1611 } 1612 1613 return host; 1614} 1615EXPORT_SYMBOL_GPL(ide_host_alloc); 1616 1617int ide_host_register(struct ide_host *host, const struct ide_port_info *d, 1618 hw_regs_t **hws) 1619{ 1620 ide_hwif_t *hwif, *mate = NULL; 1621 int i, j = 0; 1622 1623 for (i = 0; i < MAX_HOST_PORTS; i++) { 1624 hwif = host->ports[i]; 1625 1626 if (hwif == NULL) { 1627 mate = NULL; 1628 continue; 1629 } 1630 1631 ide_init_port_hw(hwif, hws[i]); 1632 ide_port_apply_params(hwif); 1633 1634 if (d == NULL) { 1635 mate = NULL; 1636 } else { 1637 if ((i & 1) && mate) { 1638 hwif->mate = mate; 1639 mate->mate = hwif; 1640 } 1641 1642 mate = (i & 1) ? NULL : hwif; 1643 1644 ide_init_port(hwif, i & 1, d); 1645 ide_port_cable_detect(hwif); 1646 } 1647 1648 ide_port_init_devices(hwif); 1649 } 1650 1651 for (i = 0; i < MAX_HOST_PORTS; i++) { 1652 hwif = host->ports[i]; 1653 1654 if (hwif == NULL) 1655 continue; 1656 1657 if (ide_probe_port(hwif) == 0) 1658 hwif->present = 1; 1659 1660 if (hwif->chipset != ide_4drives || !hwif->mate || 1661 !hwif->mate->present) 1662 ide_register_port(hwif); 1663 1664 if (hwif->present) 1665 ide_port_tune_devices(hwif); 1666 } 1667 1668 for (i = 0; i < MAX_HOST_PORTS; i++) { 1669 hwif = host->ports[i]; 1670 1671 if (hwif == NULL) 1672 continue; 1673 1674 if (hwif_init(hwif) == 0) { 1675 printk(KERN_INFO "%s: failed to initialize IDE " 1676 "interface\n", hwif->name); 1677 hwif->present = 0; 1678 continue; 1679 } 1680 1681 if (hwif->present) 1682 if (ide_port_setup_devices(hwif) == 0) { 1683 hwif->present = 0; 1684 continue; 1685 } 1686 1687 j++; 1688 1689 ide_acpi_init(hwif); 1690 1691 if (hwif->present) 1692 ide_acpi_port_init_devices(hwif); 1693 } 1694 1695 for (i = 0; i < MAX_HOST_PORTS; i++) { 1696 hwif = host->ports[i]; 1697 1698 if (hwif == NULL) 1699 continue; 1700 1701 if (hwif->chipset == ide_unknown) 1702 hwif->chipset = ide_generic; 1703 1704 if (hwif->present) 1705 hwif_register_devices(hwif); 1706 } 1707 1708 for (i = 0; i < MAX_HOST_PORTS; i++) { 1709 hwif = host->ports[i]; 1710 1711 if (hwif == NULL) 1712 continue; 1713 1714 ide_sysfs_register_port(hwif); 1715 ide_proc_register_port(hwif); 1716 1717 if (hwif->present) 1718 ide_proc_port_register_devices(hwif); 1719 } 1720 1721 return j ? 0 : -1; 1722} 1723EXPORT_SYMBOL_GPL(ide_host_register); 1724 1725int ide_host_add(const struct ide_port_info *d, hw_regs_t **hws, 1726 struct ide_host **hostp) 1727{ 1728 struct ide_host *host; 1729 int rc; 1730 1731 host = ide_host_alloc(d, hws); 1732 if (host == NULL) 1733 return -ENOMEM; 1734 1735 rc = ide_host_register(host, d, hws); 1736 if (rc) { 1737 ide_host_free(host); 1738 return rc; 1739 } 1740 1741 if (hostp) 1742 *hostp = host; 1743 1744 return 0; 1745} 1746EXPORT_SYMBOL_GPL(ide_host_add); 1747 1748void ide_host_free(struct ide_host *host) 1749{ 1750 ide_hwif_t *hwif; 1751 int i; 1752 1753 for (i = 0; i < MAX_HOST_PORTS; i++) { 1754 hwif = host->ports[i]; 1755 1756 if (hwif == NULL) 1757 continue; 1758 1759 ide_free_port_slot(hwif->index); 1760 kfree(hwif); 1761 } 1762 1763 kfree(host); 1764} 1765EXPORT_SYMBOL_GPL(ide_host_free); 1766 1767void ide_host_remove(struct ide_host *host) 1768{ 1769 int i; 1770 1771 for (i = 0; i < MAX_HOST_PORTS; i++) { 1772 if (host->ports[i]) 1773 ide_unregister(host->ports[i]); 1774 } 1775 1776 ide_host_free(host); 1777} 1778EXPORT_SYMBOL_GPL(ide_host_remove); 1779 1780void ide_port_scan(ide_hwif_t *hwif) 1781{ 1782 ide_port_apply_params(hwif); 1783 ide_port_cable_detect(hwif); 1784 ide_port_init_devices(hwif); 1785 1786 if (ide_probe_port(hwif) < 0) 1787 return; 1788 1789 hwif->present = 1; 1790 1791 ide_port_tune_devices(hwif); 1792 ide_acpi_port_init_devices(hwif); 1793 ide_port_setup_devices(hwif); 1794 hwif_register_devices(hwif); 1795 ide_proc_port_register_devices(hwif); 1796} 1797EXPORT_SYMBOL_GPL(ide_port_scan); 1798 1799static void ide_legacy_init_one(hw_regs_t **hws, hw_regs_t *hw, 1800 u8 port_no, const struct ide_port_info *d, 1801 unsigned long config) 1802{ 1803 unsigned long base, ctl; 1804 int irq; 1805 1806 if (port_no == 0) { 1807 base = 0x1f0; 1808 ctl = 0x3f6; 1809 irq = 14; 1810 } else { 1811 base = 0x170; 1812 ctl = 0x376; 1813 irq = 15; 1814 } 1815 1816 if (!request_region(base, 8, d->name)) { 1817 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n", 1818 d->name, base, base + 7); 1819 return; 1820 } 1821 1822 if (!request_region(ctl, 1, d->name)) { 1823 printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n", 1824 d->name, ctl); 1825 release_region(base, 8); 1826 return; 1827 } 1828 1829 ide_std_init_ports(hw, base, ctl); 1830 hw->irq = irq; 1831 hw->chipset = d->chipset; 1832 hw->config = config; 1833 1834 hws[port_no] = hw; 1835} 1836 1837int ide_legacy_device_add(const struct ide_port_info *d, unsigned long config) 1838{ 1839 hw_regs_t hw[2], *hws[] = { NULL, NULL, NULL, NULL }; 1840 1841 memset(&hw, 0, sizeof(hw)); 1842 1843 if ((d->host_flags & IDE_HFLAG_QD_2ND_PORT) == 0) 1844 ide_legacy_init_one(hws, &hw[0], 0, d, config); 1845 ide_legacy_init_one(hws, &hw[1], 1, d, config); 1846 1847 if (hws[0] == NULL && hws[1] == NULL && 1848 (d->host_flags & IDE_HFLAG_SINGLE)) 1849 return -ENOENT; 1850 1851 return ide_host_add(d, hws, NULL); 1852} 1853EXPORT_SYMBOL_GPL(ide_legacy_device_add); 1854