ide-probe.c revision aaaade3f059fa1b57283d4a7c8351a42ec747bf0
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#ifdef CONFIG_IDEDISK_MULTI_MODE 93 if ((max_multsect / 2) > 1) 94 id[ATA_ID_MULTSECT] = max_multsect | 0x100; 95 else 96 id[ATA_ID_MULTSECT] &= ~0x1ff; 97 98 drive->mult_req = id[ATA_ID_MULTSECT] & 0xff; 99#endif 100 if ((id[ATA_ID_MULTSECT] & 0x100) && 101 (id[ATA_ID_MULTSECT] & 0xff)) 102 drive->special.b.set_multmode = 1; 103 } 104} 105 106/** 107 * do_identify - identify a drive 108 * @drive: drive to identify 109 * @cmd: command used 110 * 111 * Called when we have issued a drive identify command to 112 * read and parse the results. This function is run with 113 * interrupts disabled. 114 */ 115 116static inline void do_identify (ide_drive_t *drive, u8 cmd) 117{ 118 ide_hwif_t *hwif = HWIF(drive); 119 u16 *id = drive->id; 120 char *m = (char *)&id[ATA_ID_PROD]; 121 int bswap = 1; 122 123 /* read 512 bytes of id info */ 124 hwif->tp_ops->input_data(drive, NULL, id, SECTOR_SIZE); 125 126 drive->id_read = 1; 127 local_irq_enable(); 128#ifdef DEBUG 129 printk(KERN_INFO "%s: dumping identify data\n", drive->name); 130 ide_dump_identify((u8 *)id); 131#endif 132 ide_fix_driveid(id); 133 134 /* 135 * ATA_CMD_ID_ATA returns little-endian info, 136 * ATA_CMD_ID_ATAPI *usually* returns little-endian info. 137 */ 138 if (cmd == ATA_CMD_ID_ATAPI) { 139 if ((m[0] == 'N' && m[1] == 'E') || /* NEC */ 140 (m[0] == 'F' && m[1] == 'X') || /* Mitsumi */ 141 (m[0] == 'P' && m[1] == 'i')) /* Pioneer */ 142 /* Vertos drives may still be weird */ 143 bswap ^= 1; 144 } 145 146 ide_fixstring(m, ATA_ID_PROD_LEN, bswap); 147 ide_fixstring((char *)&id[ATA_ID_FW_REV], ATA_ID_FW_REV_LEN, bswap); 148 ide_fixstring((char *)&id[ATA_ID_SERNO], ATA_ID_SERNO_LEN, bswap); 149 150 /* we depend on this a lot! */ 151 m[ATA_ID_PROD_LEN - 1] = '\0'; 152 153 if (strstr(m, "E X A B Y T E N E S T")) 154 goto err_misc; 155 156 printk(KERN_INFO "%s: %s, ", drive->name, m); 157 158 drive->present = 1; 159 drive->dead = 0; 160 161 /* 162 * Check for an ATAPI device 163 */ 164 if (cmd == ATA_CMD_ID_ATAPI) { 165 u8 type = (id[ATA_ID_CONFIG] >> 8) & 0x1f; 166 167 printk(KERN_CONT "ATAPI "); 168 switch (type) { 169 case ide_floppy: 170 if (!strstr(m, "CD-ROM")) { 171 if (!strstr(m, "oppy") && 172 !strstr(m, "poyp") && 173 !strstr(m, "ZIP")) 174 printk(KERN_CONT "cdrom or floppy?, assuming "); 175 if (drive->media != ide_cdrom) { 176 printk(KERN_CONT "FLOPPY"); 177 drive->removable = 1; 178 break; 179 } 180 } 181 /* Early cdrom models used zero */ 182 type = ide_cdrom; 183 case ide_cdrom: 184 drive->removable = 1; 185#ifdef CONFIG_PPC 186 /* kludge for Apple PowerBook internal zip */ 187 if (!strstr(m, "CD-ROM") && strstr(m, "ZIP")) { 188 printk(KERN_CONT "FLOPPY"); 189 type = ide_floppy; 190 break; 191 } 192#endif 193 printk(KERN_CONT "CD/DVD-ROM"); 194 break; 195 case ide_tape: 196 printk(KERN_CONT "TAPE"); 197 break; 198 case ide_optical: 199 printk(KERN_CONT "OPTICAL"); 200 drive->removable = 1; 201 break; 202 default: 203 printk(KERN_CONT "UNKNOWN (type %d)", type); 204 break; 205 } 206 printk(KERN_CONT " drive\n"); 207 drive->media = type; 208 /* an ATAPI device ignores DRDY */ 209 drive->ready_stat = 0; 210 return; 211 } 212 213 /* 214 * Not an ATAPI device: looks like a "regular" hard disk 215 */ 216 217 /* 218 * 0x848a = CompactFlash device 219 * These are *not* removable in Linux definition of the term 220 */ 221 if (id[ATA_ID_CONFIG] != 0x848a && (id[ATA_ID_CONFIG] & (1 << 7))) 222 drive->removable = 1; 223 224 drive->media = ide_disk; 225 226 printk(KERN_CONT "%s DISK drive\n", 227 (id[ATA_ID_CONFIG] == 0x848a) ? "CFA" : "ATA"); 228 229 return; 230 231err_misc: 232 kfree(id); 233 drive->present = 0; 234 return; 235} 236 237/** 238 * actual_try_to_identify - send ata/atapi identify 239 * @drive: drive to identify 240 * @cmd: command to use 241 * 242 * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive 243 * and waits for a response. It also monitors irqs while this is 244 * happening, in hope of automatically determining which one is 245 * being used by the interface. 246 * 247 * Returns: 0 device was identified 248 * 1 device timed-out (no response to identify request) 249 * 2 device aborted the command (refused to identify itself) 250 */ 251 252static int actual_try_to_identify (ide_drive_t *drive, u8 cmd) 253{ 254 ide_hwif_t *hwif = HWIF(drive); 255 struct ide_io_ports *io_ports = &hwif->io_ports; 256 const struct ide_tp_ops *tp_ops = hwif->tp_ops; 257 int use_altstatus = 0, rc; 258 unsigned long timeout; 259 u8 s = 0, a = 0; 260 261 /* take a deep breath */ 262 msleep(50); 263 264 if (io_ports->ctl_addr) { 265 a = tp_ops->read_altstatus(hwif); 266 s = tp_ops->read_status(hwif); 267 if ((a ^ s) & ~INDEX_STAT) 268 /* ancient Seagate drives, broken interfaces */ 269 printk(KERN_INFO "%s: probing with STATUS(0x%02x) " 270 "instead of ALTSTATUS(0x%02x)\n", 271 drive->name, s, a); 272 else 273 /* use non-intrusive polling */ 274 use_altstatus = 1; 275 } 276 277 /* set features register for atapi 278 * identify command to be sure of reply 279 */ 280 if (cmd == ATA_CMD_ID_ATAPI) { 281 ide_task_t task; 282 283 memset(&task, 0, sizeof(task)); 284 /* disable DMA & overlap */ 285 task.tf_flags = IDE_TFLAG_OUT_FEATURE; 286 287 tp_ops->tf_load(drive, &task); 288 } 289 290 /* ask drive for ID */ 291 tp_ops->exec_command(hwif, cmd); 292 293 timeout = ((cmd == ATA_CMD_ID_ATA) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2; 294 timeout += jiffies; 295 do { 296 if (time_after(jiffies, timeout)) { 297 /* drive timed-out */ 298 return 1; 299 } 300 /* give drive a breather */ 301 msleep(50); 302 s = use_altstatus ? tp_ops->read_altstatus(hwif) 303 : tp_ops->read_status(hwif); 304 } while (s & BUSY_STAT); 305 306 /* wait for IRQ and DRQ_STAT */ 307 msleep(50); 308 s = tp_ops->read_status(hwif); 309 310 if (OK_STAT(s, DRQ_STAT, BAD_R_STAT)) { 311 unsigned long flags; 312 313 /* local CPU only; some systems need this */ 314 local_irq_save(flags); 315 /* drive returned ID */ 316 do_identify(drive, cmd); 317 /* drive responded with ID */ 318 rc = 0; 319 /* clear drive IRQ */ 320 (void)tp_ops->read_status(hwif); 321 local_irq_restore(flags); 322 } else { 323 /* drive refused ID */ 324 rc = 2; 325 } 326 return rc; 327} 328 329/** 330 * try_to_identify - try to identify a drive 331 * @drive: drive to probe 332 * @cmd: command to use 333 * 334 * Issue the identify command and then do IRQ probing to 335 * complete the identification when needed by finding the 336 * IRQ the drive is attached to 337 */ 338 339static int try_to_identify (ide_drive_t *drive, u8 cmd) 340{ 341 ide_hwif_t *hwif = HWIF(drive); 342 const struct ide_tp_ops *tp_ops = hwif->tp_ops; 343 int retval; 344 int autoprobe = 0; 345 unsigned long cookie = 0; 346 347 /* 348 * Disable device irq unless we need to 349 * probe for it. Otherwise we'll get spurious 350 * interrupts during the identify-phase that 351 * the irq handler isn't expecting. 352 */ 353 if (hwif->io_ports.ctl_addr) { 354 if (!hwif->irq) { 355 autoprobe = 1; 356 cookie = probe_irq_on(); 357 } 358 tp_ops->set_irq(hwif, autoprobe); 359 } 360 361 retval = actual_try_to_identify(drive, cmd); 362 363 if (autoprobe) { 364 int irq; 365 366 tp_ops->set_irq(hwif, 0); 367 /* clear drive IRQ */ 368 (void)tp_ops->read_status(hwif); 369 udelay(5); 370 irq = probe_irq_off(cookie); 371 if (!hwif->irq) { 372 if (irq > 0) { 373 hwif->irq = irq; 374 } else { 375 /* Mmmm.. multiple IRQs.. 376 * don't know which was ours 377 */ 378 printk(KERN_ERR "%s: IRQ probe failed (0x%lx)\n", 379 drive->name, cookie); 380 } 381 } 382 } 383 return retval; 384} 385 386static int ide_busy_sleep(ide_hwif_t *hwif) 387{ 388 unsigned long timeout = jiffies + WAIT_WORSTCASE; 389 u8 stat; 390 391 do { 392 msleep(50); 393 stat = hwif->tp_ops->read_status(hwif); 394 if ((stat & BUSY_STAT) == 0) 395 return 0; 396 } while (time_before(jiffies, timeout)); 397 398 return 1; 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 stat; 440 441 if (drive->present) { 442 /* avoid waiting for inappropriate probes */ 443 if (drive->media != ide_disk && cmd == ATA_CMD_ID_ATA) 444 return 4; 445 } 446#ifdef DEBUG 447 printk(KERN_INFO "probing for %s: present=%d, media=%d, probetype=%s\n", 448 drive->name, drive->present, drive->media, 449 (cmd == ATA_CMD_ID_ATA) ? "ATA" : "ATAPI"); 450#endif 451 452 /* needed for some systems 453 * (e.g. crw9624 as drive0 with disk as slave) 454 */ 455 msleep(50); 456 SELECT_DRIVE(drive); 457 msleep(50); 458 459 if (ide_read_device(drive) != drive->select.all && !drive->present) { 460 if (drive->select.b.unit != 0) { 461 /* exit with drive0 selected */ 462 SELECT_DRIVE(&hwif->drives[0]); 463 /* allow BUSY_STAT to assert & clear */ 464 msleep(50); 465 } 466 /* no i/f present: mmm.. this should be a 4 -ml */ 467 return 3; 468 } 469 470 stat = tp_ops->read_status(hwif); 471 472 if (OK_STAT(stat, READY_STAT, BUSY_STAT) || 473 drive->present || cmd == ATA_CMD_ID_ATAPI) { 474 /* send cmd and wait */ 475 if ((rc = try_to_identify(drive, cmd))) { 476 /* failed: try again */ 477 rc = try_to_identify(drive,cmd); 478 } 479 480 stat = tp_ops->read_status(hwif); 481 482 if (stat == (BUSY_STAT | READY_STAT)) 483 return 4; 484 485 if (rc == 1 && cmd == ATA_CMD_ID_ATAPI) { 486 printk(KERN_ERR "%s: no response (status = 0x%02x), " 487 "resetting drive\n", drive->name, stat); 488 msleep(50); 489 SELECT_DRIVE(drive); 490 msleep(50); 491 tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET); 492 (void)ide_busy_sleep(hwif); 493 rc = try_to_identify(drive, cmd); 494 } 495 496 /* ensure drive IRQ is clear */ 497 stat = tp_ops->read_status(hwif); 498 499 if (rc == 1) 500 printk(KERN_ERR "%s: no response (status = 0x%02x)\n", 501 drive->name, stat); 502 } else { 503 /* not present or maybe ATAPI */ 504 rc = 3; 505 } 506 if (drive->select.b.unit != 0) { 507 /* exit with drive0 selected */ 508 SELECT_DRIVE(&hwif->drives[0]); 509 msleep(50); 510 /* ensure drive irq is clear */ 511 (void)tp_ops->read_status(hwif); 512 } 513 return rc; 514} 515 516/* 517 * 518 */ 519static void enable_nest (ide_drive_t *drive) 520{ 521 ide_hwif_t *hwif = HWIF(drive); 522 const struct ide_tp_ops *tp_ops = hwif->tp_ops; 523 u8 stat; 524 525 printk(KERN_INFO "%s: enabling %s -- ", 526 hwif->name, (char *)&drive->id[ATA_ID_PROD]); 527 528 SELECT_DRIVE(drive); 529 msleep(50); 530 tp_ops->exec_command(hwif, ATA_EXABYTE_ENABLE_NEST); 531 532 if (ide_busy_sleep(hwif)) { 533 printk(KERN_CONT "failed (timeout)\n"); 534 return; 535 } 536 537 msleep(50); 538 539 stat = tp_ops->read_status(hwif); 540 541 if (!OK_STAT(stat, 0, BAD_STAT)) 542 printk(KERN_CONT "failed (status = 0x%02x)\n", stat); 543 else 544 printk(KERN_CONT "success\n"); 545 546 /* if !(success||timed-out) */ 547 if (do_probe(drive, ATA_CMD_ID_ATA) >= 2) 548 /* look for ATAPI device */ 549 (void)do_probe(drive, ATA_CMD_ID_ATAPI); 550} 551 552/** 553 * probe_for_drives - upper level drive probe 554 * @drive: drive to probe for 555 * 556 * probe_for_drive() tests for existence of a given drive using do_probe() 557 * and presents things to the user as needed. 558 * 559 * Returns: 0 no device was found 560 * 1 device was found (note: drive->present might 561 * still be 0) 562 */ 563 564static inline u8 probe_for_drive (ide_drive_t *drive) 565{ 566 char *m; 567 568 /* 569 * In order to keep things simple we have an id 570 * block for all drives at all times. If the device 571 * is pre ATA or refuses ATA/ATAPI identify we 572 * will add faked data to this. 573 * 574 * Also note that 0 everywhere means "can't do X" 575 */ 576 577 drive->id = kzalloc(SECTOR_WORDS *4, GFP_KERNEL); 578 drive->id_read = 0; 579 if(drive->id == NULL) 580 { 581 printk(KERN_ERR "ide: out of memory for id data.\n"); 582 return 0; 583 } 584 585 m = (char *)&drive->id[ATA_ID_PROD]; 586 strcpy(m, "UNKNOWN"); 587 588 /* skip probing? */ 589 if (!drive->noprobe) 590 { 591 /* if !(success||timed-out) */ 592 if (do_probe(drive, ATA_CMD_ID_ATA) >= 2) 593 /* look for ATAPI device */ 594 (void)do_probe(drive, ATA_CMD_ID_ATAPI); 595 if (!drive->present) 596 /* drive not found */ 597 return 0; 598 599 if (strstr(m, "E X A B Y T E N E S T")) 600 enable_nest(drive); 601 602 /* identification failed? */ 603 if (!drive->id_read) { 604 if (drive->media == ide_disk) { 605 printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n", 606 drive->name, drive->cyl, 607 drive->head, drive->sect); 608 } else if (drive->media == ide_cdrom) { 609 printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name); 610 } else { 611 /* nuke it */ 612 printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name); 613 drive->present = 0; 614 } 615 } 616 /* drive was found */ 617 } 618 if(!drive->present) 619 return 0; 620 /* The drive wasn't being helpful. Add generic info only */ 621 if (drive->id_read == 0) { 622 generic_id(drive); 623 return 1; 624 } 625 626 if (drive->media == ide_disk) { 627 ide_disk_init_chs(drive); 628 ide_disk_init_mult_count(drive); 629 } 630 631 return drive->present; 632} 633 634static void hwif_release_dev(struct device *dev) 635{ 636 ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev); 637 638 complete(&hwif->gendev_rel_comp); 639} 640 641static int ide_register_port(ide_hwif_t *hwif) 642{ 643 int ret; 644 645 /* register with global device tree */ 646 strlcpy(hwif->gendev.bus_id,hwif->name,BUS_ID_SIZE); 647 hwif->gendev.driver_data = hwif; 648 if (hwif->gendev.parent == NULL) { 649 if (hwif->dev) 650 hwif->gendev.parent = hwif->dev; 651 else 652 /* Would like to do = &device_legacy */ 653 hwif->gendev.parent = NULL; 654 } 655 hwif->gendev.release = hwif_release_dev; 656 ret = device_register(&hwif->gendev); 657 if (ret < 0) { 658 printk(KERN_WARNING "IDE: %s: device_register error: %d\n", 659 __func__, ret); 660 goto out; 661 } 662 663 hwif->portdev = device_create_drvdata(ide_port_class, &hwif->gendev, 664 MKDEV(0, 0), hwif, hwif->name); 665 if (IS_ERR(hwif->portdev)) { 666 ret = PTR_ERR(hwif->portdev); 667 device_unregister(&hwif->gendev); 668 } 669out: 670 return ret; 671} 672 673/** 674 * ide_port_wait_ready - wait for port to become ready 675 * @hwif: IDE port 676 * 677 * This is needed on some PPCs and a bunch of BIOS-less embedded 678 * platforms. Typical cases are: 679 * 680 * - The firmware hard reset the disk before booting the kernel, 681 * the drive is still doing it's poweron-reset sequence, that 682 * can take up to 30 seconds. 683 * 684 * - The firmware does nothing (or no firmware), the device is 685 * still in POST state (same as above actually). 686 * 687 * - Some CD/DVD/Writer combo drives tend to drive the bus during 688 * their reset sequence even when they are non-selected slave 689 * devices, thus preventing discovery of the main HD. 690 * 691 * Doing this wait-for-non-busy should not harm any existing 692 * configuration and fix some issues like the above. 693 * 694 * BenH. 695 * 696 * Returns 0 on success, error code (< 0) otherwise. 697 */ 698 699static int ide_port_wait_ready(ide_hwif_t *hwif) 700{ 701 int unit, rc; 702 703 printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name); 704 705 /* Let HW settle down a bit from whatever init state we 706 * come from */ 707 mdelay(2); 708 709 /* Wait for BSY bit to go away, spec timeout is 30 seconds, 710 * I know of at least one disk who takes 31 seconds, I use 35 711 * here to be safe 712 */ 713 rc = ide_wait_not_busy(hwif, 35000); 714 if (rc) 715 return rc; 716 717 /* Now make sure both master & slave are ready */ 718 for (unit = 0; unit < MAX_DRIVES; unit++) { 719 ide_drive_t *drive = &hwif->drives[unit]; 720 721 /* Ignore disks that we will not probe for later. */ 722 if (!drive->noprobe || drive->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->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->present = 0; 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].noprobe && hwif->drives[1].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 drive->dn = (hwif->channel ? 2 : 0) + unit; 810 (void) probe_for_drive(drive); 811 if (drive->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->present && port_ops && port_ops->quirkproc) 836 port_ops->quirkproc(drive); 837 } 838 839 for (unit = 0; unit < MAX_DRIVES; ++unit) { 840 ide_drive_t *drive = &hwif->drives[unit]; 841 842 if (drive->present) { 843 ide_set_max_pio(drive); 844 845 drive->nice1 = 1; 846 847 if (hwif->dma_ops) 848 ide_set_dma(drive); 849 } 850 } 851 852 for (unit = 0; unit < MAX_DRIVES; ++unit) { 853 ide_drive_t *drive = &hwif->drives[unit]; 854 855 if (hwif->host_flags & IDE_HFLAG_NO_IO_32BIT) 856 drive->no_io_32bit = 1; 857 else 858 drive->no_io_32bit = drive->id[ATA_ID_DWORD_IO] ? 1 : 0; 859 } 860} 861 862#if MAX_HWIFS > 1 863/* 864 * save_match() is used to simplify logic in init_irq() below. 865 * 866 * A loophole here is that we may not know about a particular 867 * hwif's irq until after that hwif is actually probed/initialized.. 868 * This could be a problem for the case where an hwif is on a 869 * dual interface that requires serialization (eg. cmd640) and another 870 * hwif using one of the same irqs is initialized beforehand. 871 * 872 * This routine detects and reports such situations, but does not fix them. 873 */ 874static void save_match(ide_hwif_t *hwif, ide_hwif_t *new, ide_hwif_t **match) 875{ 876 ide_hwif_t *m = *match; 877 878 if (m && m->hwgroup && m->hwgroup != new->hwgroup) { 879 if (!new->hwgroup) 880 return; 881 printk(KERN_WARNING "%s: potential IRQ problem with %s and %s\n", 882 hwif->name, new->name, m->name); 883 } 884 if (!m || m->irq != hwif->irq) /* don't undo a prior perfect match */ 885 *match = new; 886} 887#endif /* MAX_HWIFS > 1 */ 888 889/* 890 * init request queue 891 */ 892static int ide_init_queue(ide_drive_t *drive) 893{ 894 struct request_queue *q; 895 ide_hwif_t *hwif = HWIF(drive); 896 int max_sectors = 256; 897 int max_sg_entries = PRD_ENTRIES; 898 899 /* 900 * Our default set up assumes the normal IDE case, 901 * that is 64K segmenting, standard PRD setup 902 * and LBA28. Some drivers then impose their own 903 * limits and LBA48 we could raise it but as yet 904 * do not. 905 */ 906 907 q = blk_init_queue_node(do_ide_request, &ide_lock, hwif_to_node(hwif)); 908 if (!q) 909 return 1; 910 911 q->queuedata = drive; 912 blk_queue_segment_boundary(q, 0xffff); 913 914 if (hwif->rqsize < max_sectors) 915 max_sectors = hwif->rqsize; 916 blk_queue_max_sectors(q, max_sectors); 917 918#ifdef CONFIG_PCI 919 /* When we have an IOMMU, we may have a problem where pci_map_sg() 920 * creates segments that don't completely match our boundary 921 * requirements and thus need to be broken up again. Because it 922 * doesn't align properly either, we may actually have to break up 923 * to more segments than what was we got in the first place, a max 924 * worst case is twice as many. 925 * This will be fixed once we teach pci_map_sg() about our boundary 926 * requirements, hopefully soon. *FIXME* 927 */ 928 if (!PCI_DMA_BUS_IS_PHYS) 929 max_sg_entries >>= 1; 930#endif /* CONFIG_PCI */ 931 932 blk_queue_max_hw_segments(q, max_sg_entries); 933 blk_queue_max_phys_segments(q, max_sg_entries); 934 935 /* assign drive queue */ 936 drive->queue = q; 937 938 /* needs drive->queue to be set */ 939 ide_toggle_bounce(drive, 1); 940 941 return 0; 942} 943 944static void ide_add_drive_to_hwgroup(ide_drive_t *drive) 945{ 946 ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; 947 948 spin_lock_irq(&ide_lock); 949 if (!hwgroup->drive) { 950 /* first drive for hwgroup. */ 951 drive->next = drive; 952 hwgroup->drive = drive; 953 hwgroup->hwif = HWIF(hwgroup->drive); 954 } else { 955 drive->next = hwgroup->drive->next; 956 hwgroup->drive->next = drive; 957 } 958 spin_unlock_irq(&ide_lock); 959} 960 961/* 962 * For any present drive: 963 * - allocate the block device queue 964 * - link drive into the hwgroup 965 */ 966static void ide_port_setup_devices(ide_hwif_t *hwif) 967{ 968 int i; 969 970 mutex_lock(&ide_cfg_mtx); 971 for (i = 0; i < MAX_DRIVES; i++) { 972 ide_drive_t *drive = &hwif->drives[i]; 973 974 if (!drive->present) 975 continue; 976 977 if (ide_init_queue(drive)) { 978 printk(KERN_ERR "ide: failed to init %s\n", 979 drive->name); 980 continue; 981 } 982 983 ide_add_drive_to_hwgroup(drive); 984 } 985 mutex_unlock(&ide_cfg_mtx); 986} 987 988static ide_hwif_t *ide_ports[MAX_HWIFS]; 989 990void ide_remove_port_from_hwgroup(ide_hwif_t *hwif) 991{ 992 ide_hwgroup_t *hwgroup = hwif->hwgroup; 993 994 ide_ports[hwif->index] = NULL; 995 996 spin_lock_irq(&ide_lock); 997 /* 998 * Remove us from the hwgroup, and free 999 * the hwgroup if we were the only member 1000 */ 1001 if (hwif->next == hwif) { 1002 BUG_ON(hwgroup->hwif != hwif); 1003 kfree(hwgroup); 1004 } else { 1005 /* There is another interface in hwgroup. 1006 * Unlink us, and set hwgroup->drive and ->hwif to 1007 * something sane. 1008 */ 1009 ide_hwif_t *g = hwgroup->hwif; 1010 1011 while (g->next != hwif) 1012 g = g->next; 1013 g->next = hwif->next; 1014 if (hwgroup->hwif == hwif) { 1015 /* Chose a random hwif for hwgroup->hwif. 1016 * It's guaranteed that there are no drives 1017 * left in the hwgroup. 1018 */ 1019 BUG_ON(hwgroup->drive != NULL); 1020 hwgroup->hwif = g; 1021 } 1022 BUG_ON(hwgroup->hwif == hwif); 1023 } 1024 spin_unlock_irq(&ide_lock); 1025} 1026 1027/* 1028 * This routine sets up the irq for an ide interface, and creates a new 1029 * hwgroup for the irq/hwif if none was previously assigned. 1030 * 1031 * Much of the code is for correctly detecting/handling irq sharing 1032 * and irq serialization situations. This is somewhat complex because 1033 * it handles static as well as dynamic (PCMCIA) IDE interfaces. 1034 */ 1035static int init_irq (ide_hwif_t *hwif) 1036{ 1037 struct ide_io_ports *io_ports = &hwif->io_ports; 1038 unsigned int index; 1039 ide_hwgroup_t *hwgroup; 1040 ide_hwif_t *match = NULL; 1041 1042 1043 BUG_ON(in_interrupt()); 1044 BUG_ON(irqs_disabled()); 1045 BUG_ON(hwif == NULL); 1046 1047 mutex_lock(&ide_cfg_mtx); 1048 hwif->hwgroup = NULL; 1049#if MAX_HWIFS > 1 1050 /* 1051 * Group up with any other hwifs that share our irq(s). 1052 */ 1053 for (index = 0; index < MAX_HWIFS; index++) { 1054 ide_hwif_t *h = ide_ports[index]; 1055 1056 if (h && h->hwgroup) { /* scan only initialized ports */ 1057 if (hwif->irq == h->irq) { 1058 hwif->sharing_irq = h->sharing_irq = 1; 1059 if (hwif->chipset != ide_pci || 1060 h->chipset != ide_pci) { 1061 save_match(hwif, h, &match); 1062 } 1063 } 1064 if (hwif->serialized) { 1065 if (hwif->mate && hwif->mate->irq == h->irq) 1066 save_match(hwif, h, &match); 1067 } 1068 if (h->serialized) { 1069 if (h->mate && hwif->irq == h->mate->irq) 1070 save_match(hwif, h, &match); 1071 } 1072 } 1073 } 1074#endif /* MAX_HWIFS > 1 */ 1075 /* 1076 * If we are still without a hwgroup, then form a new one 1077 */ 1078 if (match) { 1079 hwgroup = match->hwgroup; 1080 hwif->hwgroup = hwgroup; 1081 /* 1082 * Link us into the hwgroup. 1083 * This must be done early, do ensure that unexpected_intr 1084 * can find the hwif and prevent irq storms. 1085 * No drives are attached to the new hwif, choose_drive 1086 * can't do anything stupid (yet). 1087 * Add ourself as the 2nd entry to the hwgroup->hwif 1088 * linked list, the first entry is the hwif that owns 1089 * hwgroup->handler - do not change that. 1090 */ 1091 spin_lock_irq(&ide_lock); 1092 hwif->next = hwgroup->hwif->next; 1093 hwgroup->hwif->next = hwif; 1094 BUG_ON(hwif->next == hwif); 1095 spin_unlock_irq(&ide_lock); 1096 } else { 1097 hwgroup = kmalloc_node(sizeof(*hwgroup), GFP_KERNEL|__GFP_ZERO, 1098 hwif_to_node(hwif)); 1099 if (hwgroup == NULL) 1100 goto out_up; 1101 1102 hwif->hwgroup = hwgroup; 1103 hwgroup->hwif = hwif->next = hwif; 1104 1105 init_timer(&hwgroup->timer); 1106 hwgroup->timer.function = &ide_timer_expiry; 1107 hwgroup->timer.data = (unsigned long) hwgroup; 1108 } 1109 1110 ide_ports[hwif->index] = hwif; 1111 1112 /* 1113 * Allocate the irq, if not already obtained for another hwif 1114 */ 1115 if (!match || match->irq != hwif->irq) { 1116 int sa = 0; 1117#if defined(__mc68000__) 1118 sa = IRQF_SHARED; 1119#endif /* __mc68000__ */ 1120 1121 if (IDE_CHIPSET_IS_PCI(hwif->chipset)) 1122 sa = IRQF_SHARED; 1123 1124 if (io_ports->ctl_addr) 1125 hwif->tp_ops->set_irq(hwif, 1); 1126 1127 if (request_irq(hwif->irq,&ide_intr,sa,hwif->name,hwgroup)) 1128 goto out_unlink; 1129 } 1130 1131 if (!hwif->rqsize) { 1132 if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) || 1133 (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA)) 1134 hwif->rqsize = 256; 1135 else 1136 hwif->rqsize = 65536; 1137 } 1138 1139#if !defined(__mc68000__) 1140 printk(KERN_INFO "%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name, 1141 io_ports->data_addr, io_ports->status_addr, 1142 io_ports->ctl_addr, hwif->irq); 1143#else 1144 printk(KERN_INFO "%s at 0x%08lx on irq %d", hwif->name, 1145 io_ports->data_addr, hwif->irq); 1146#endif /* __mc68000__ */ 1147 if (match) 1148 printk(KERN_CONT " (%sed with %s)", 1149 hwif->sharing_irq ? "shar" : "serializ", match->name); 1150 printk(KERN_CONT "\n"); 1151 1152 mutex_unlock(&ide_cfg_mtx); 1153 return 0; 1154out_unlink: 1155 ide_remove_port_from_hwgroup(hwif); 1156out_up: 1157 mutex_unlock(&ide_cfg_mtx); 1158 return 1; 1159} 1160 1161static int ata_lock(dev_t dev, void *data) 1162{ 1163 /* FIXME: we want to pin hwif down */ 1164 return 0; 1165} 1166 1167static struct kobject *ata_probe(dev_t dev, int *part, void *data) 1168{ 1169 ide_hwif_t *hwif = data; 1170 int unit = *part >> PARTN_BITS; 1171 ide_drive_t *drive = &hwif->drives[unit]; 1172 if (!drive->present) 1173 return NULL; 1174 1175 if (drive->media == ide_disk) 1176 request_module("ide-disk"); 1177 if (drive->scsi) 1178 request_module("ide-scsi"); 1179 if (drive->media == ide_cdrom || drive->media == ide_optical) 1180 request_module("ide-cd"); 1181 if (drive->media == ide_tape) 1182 request_module("ide-tape"); 1183 if (drive->media == ide_floppy) 1184 request_module("ide-floppy"); 1185 1186 return NULL; 1187} 1188 1189static struct kobject *exact_match(dev_t dev, int *part, void *data) 1190{ 1191 struct gendisk *p = data; 1192 *part &= (1 << PARTN_BITS) - 1; 1193 return &disk_to_dev(p)->kobj; 1194} 1195 1196static int exact_lock(dev_t dev, void *data) 1197{ 1198 struct gendisk *p = data; 1199 1200 if (!get_disk(p)) 1201 return -1; 1202 return 0; 1203} 1204 1205void ide_register_region(struct gendisk *disk) 1206{ 1207 blk_register_region(MKDEV(disk->major, disk->first_minor), 1208 disk->minors, NULL, exact_match, exact_lock, disk); 1209} 1210 1211EXPORT_SYMBOL_GPL(ide_register_region); 1212 1213void ide_unregister_region(struct gendisk *disk) 1214{ 1215 blk_unregister_region(MKDEV(disk->major, disk->first_minor), 1216 disk->minors); 1217} 1218 1219EXPORT_SYMBOL_GPL(ide_unregister_region); 1220 1221void ide_init_disk(struct gendisk *disk, ide_drive_t *drive) 1222{ 1223 ide_hwif_t *hwif = drive->hwif; 1224 unsigned int unit = (drive->select.all >> 4) & 1; 1225 1226 disk->major = hwif->major; 1227 disk->first_minor = unit << PARTN_BITS; 1228 sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit); 1229 disk->queue = drive->queue; 1230} 1231 1232EXPORT_SYMBOL_GPL(ide_init_disk); 1233 1234static void ide_remove_drive_from_hwgroup(ide_drive_t *drive) 1235{ 1236 ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; 1237 1238 if (drive == drive->next) { 1239 /* special case: last drive from hwgroup. */ 1240 BUG_ON(hwgroup->drive != drive); 1241 hwgroup->drive = NULL; 1242 } else { 1243 ide_drive_t *walk; 1244 1245 walk = hwgroup->drive; 1246 while (walk->next != drive) 1247 walk = walk->next; 1248 walk->next = drive->next; 1249 if (hwgroup->drive == drive) { 1250 hwgroup->drive = drive->next; 1251 hwgroup->hwif = hwgroup->drive->hwif; 1252 } 1253 } 1254 BUG_ON(hwgroup->drive == drive); 1255} 1256 1257static void drive_release_dev (struct device *dev) 1258{ 1259 ide_drive_t *drive = container_of(dev, ide_drive_t, gendev); 1260 1261 ide_proc_unregister_device(drive); 1262 1263 spin_lock_irq(&ide_lock); 1264 ide_remove_drive_from_hwgroup(drive); 1265 kfree(drive->id); 1266 drive->id = NULL; 1267 drive->present = 0; 1268 /* Messed up locking ... */ 1269 spin_unlock_irq(&ide_lock); 1270 blk_cleanup_queue(drive->queue); 1271 spin_lock_irq(&ide_lock); 1272 drive->queue = NULL; 1273 spin_unlock_irq(&ide_lock); 1274 1275 complete(&drive->gendev_rel_comp); 1276} 1277 1278static int hwif_init(ide_hwif_t *hwif) 1279{ 1280 int old_irq; 1281 1282 if (!hwif->irq) { 1283 hwif->irq = __ide_default_irq(hwif->io_ports.data_addr); 1284 if (!hwif->irq) { 1285 printk(KERN_ERR "%s: disabled, no IRQ\n", hwif->name); 1286 return 0; 1287 } 1288 } 1289 1290 if (register_blkdev(hwif->major, hwif->name)) 1291 return 0; 1292 1293 if (!hwif->sg_max_nents) 1294 hwif->sg_max_nents = PRD_ENTRIES; 1295 1296 hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents, 1297 GFP_KERNEL); 1298 if (!hwif->sg_table) { 1299 printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name); 1300 goto out; 1301 } 1302 1303 sg_init_table(hwif->sg_table, hwif->sg_max_nents); 1304 1305 if (init_irq(hwif) == 0) 1306 goto done; 1307 1308 old_irq = hwif->irq; 1309 /* 1310 * It failed to initialise. Find the default IRQ for 1311 * this port and try that. 1312 */ 1313 hwif->irq = __ide_default_irq(hwif->io_ports.data_addr); 1314 if (!hwif->irq) { 1315 printk(KERN_ERR "%s: disabled, unable to get IRQ %d\n", 1316 hwif->name, old_irq); 1317 goto out; 1318 } 1319 if (init_irq(hwif)) { 1320 printk(KERN_ERR "%s: probed IRQ %d and default IRQ %d failed\n", 1321 hwif->name, old_irq, hwif->irq); 1322 goto out; 1323 } 1324 printk(KERN_WARNING "%s: probed IRQ %d failed, using default\n", 1325 hwif->name, hwif->irq); 1326 1327done: 1328 blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS, 1329 THIS_MODULE, ata_probe, ata_lock, hwif); 1330 return 1; 1331 1332out: 1333 unregister_blkdev(hwif->major, hwif->name); 1334 return 0; 1335} 1336 1337static void hwif_register_devices(ide_hwif_t *hwif) 1338{ 1339 unsigned int i; 1340 1341 for (i = 0; i < MAX_DRIVES; i++) { 1342 ide_drive_t *drive = &hwif->drives[i]; 1343 struct device *dev = &drive->gendev; 1344 int ret; 1345 1346 if (!drive->present) 1347 continue; 1348 1349 ide_add_generic_settings(drive); 1350 1351 snprintf(dev->bus_id, BUS_ID_SIZE, "%u.%u", hwif->index, i); 1352 dev->parent = &hwif->gendev; 1353 dev->bus = &ide_bus_type; 1354 dev->driver_data = drive; 1355 dev->release = drive_release_dev; 1356 1357 ret = device_register(dev); 1358 if (ret < 0) 1359 printk(KERN_WARNING "IDE: %s: device_register error: " 1360 "%d\n", __func__, ret); 1361 } 1362} 1363 1364static void ide_port_init_devices(ide_hwif_t *hwif) 1365{ 1366 const struct ide_port_ops *port_ops = hwif->port_ops; 1367 int i; 1368 1369 for (i = 0; i < MAX_DRIVES; i++) { 1370 ide_drive_t *drive = &hwif->drives[i]; 1371 1372 if (hwif->host_flags & IDE_HFLAG_IO_32BIT) 1373 drive->io_32bit = 1; 1374 if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS) 1375 drive->unmask = 1; 1376 if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS) 1377 drive->no_unmask = 1; 1378 1379 if (port_ops && port_ops->init_dev) 1380 port_ops->init_dev(drive); 1381 } 1382} 1383 1384static void ide_init_port(ide_hwif_t *hwif, unsigned int port, 1385 const struct ide_port_info *d) 1386{ 1387 hwif->channel = port; 1388 1389 if (d->chipset) 1390 hwif->chipset = d->chipset; 1391 1392 if (d->init_iops) 1393 d->init_iops(hwif); 1394 1395 if ((!hwif->irq && (d->host_flags & IDE_HFLAG_LEGACY_IRQS)) || 1396 (d->host_flags & IDE_HFLAG_FORCE_LEGACY_IRQS)) 1397 hwif->irq = port ? 15 : 14; 1398 1399 /* ->host_flags may be set by ->init_iops (or even earlier...) */ 1400 hwif->host_flags |= d->host_flags; 1401 hwif->pio_mask = d->pio_mask; 1402 1403 if (d->tp_ops) 1404 hwif->tp_ops = d->tp_ops; 1405 1406 /* ->set_pio_mode for DTC2278 is currently limited to port 0 */ 1407 if (hwif->chipset != ide_dtc2278 || hwif->channel == 0) 1408 hwif->port_ops = d->port_ops; 1409 1410 hwif->swdma_mask = d->swdma_mask; 1411 hwif->mwdma_mask = d->mwdma_mask; 1412 hwif->ultra_mask = d->udma_mask; 1413 1414 if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) { 1415 int rc; 1416 1417 if (d->init_dma) 1418 rc = d->init_dma(hwif, d); 1419 else 1420 rc = ide_hwif_setup_dma(hwif, d); 1421 1422 if (rc < 0) { 1423 printk(KERN_INFO "%s: DMA disabled\n", hwif->name); 1424 hwif->dma_base = 0; 1425 hwif->swdma_mask = 0; 1426 hwif->mwdma_mask = 0; 1427 hwif->ultra_mask = 0; 1428 } else if (d->dma_ops) 1429 hwif->dma_ops = d->dma_ops; 1430 } 1431 1432 if ((d->host_flags & IDE_HFLAG_SERIALIZE) || 1433 ((d->host_flags & IDE_HFLAG_SERIALIZE_DMA) && hwif->dma_base)) { 1434 if (hwif->mate) 1435 hwif->mate->serialized = hwif->serialized = 1; 1436 } 1437 1438 if (d->host_flags & IDE_HFLAG_RQSIZE_256) 1439 hwif->rqsize = 256; 1440 1441 /* call chipset specific routine for each enabled port */ 1442 if (d->init_hwif) 1443 d->init_hwif(hwif); 1444} 1445 1446static void ide_port_cable_detect(ide_hwif_t *hwif) 1447{ 1448 const struct ide_port_ops *port_ops = hwif->port_ops; 1449 1450 if (port_ops && port_ops->cable_detect && (hwif->ultra_mask & 0x78)) { 1451 if (hwif->cbl != ATA_CBL_PATA40_SHORT) 1452 hwif->cbl = port_ops->cable_detect(hwif); 1453 } 1454} 1455 1456static ssize_t store_delete_devices(struct device *portdev, 1457 struct device_attribute *attr, 1458 const char *buf, size_t n) 1459{ 1460 ide_hwif_t *hwif = dev_get_drvdata(portdev); 1461 1462 if (strncmp(buf, "1", n)) 1463 return -EINVAL; 1464 1465 ide_port_unregister_devices(hwif); 1466 1467 return n; 1468}; 1469 1470static DEVICE_ATTR(delete_devices, S_IWUSR, NULL, store_delete_devices); 1471 1472static ssize_t store_scan(struct device *portdev, 1473 struct device_attribute *attr, 1474 const char *buf, size_t n) 1475{ 1476 ide_hwif_t *hwif = dev_get_drvdata(portdev); 1477 1478 if (strncmp(buf, "1", n)) 1479 return -EINVAL; 1480 1481 ide_port_unregister_devices(hwif); 1482 ide_port_scan(hwif); 1483 1484 return n; 1485}; 1486 1487static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan); 1488 1489static struct device_attribute *ide_port_attrs[] = { 1490 &dev_attr_delete_devices, 1491 &dev_attr_scan, 1492 NULL 1493}; 1494 1495static int ide_sysfs_register_port(ide_hwif_t *hwif) 1496{ 1497 int i, uninitialized_var(rc); 1498 1499 for (i = 0; ide_port_attrs[i]; i++) { 1500 rc = device_create_file(hwif->portdev, ide_port_attrs[i]); 1501 if (rc) 1502 break; 1503 } 1504 1505 return rc; 1506} 1507 1508static unsigned int ide_indexes; 1509 1510/** 1511 * ide_find_port_slot - find free port slot 1512 * @d: IDE port info 1513 * 1514 * Return the new port slot index or -ENOENT if we are out of free slots. 1515 */ 1516 1517static int ide_find_port_slot(const struct ide_port_info *d) 1518{ 1519 int idx = -ENOENT; 1520 u8 bootable = (d && (d->host_flags & IDE_HFLAG_NON_BOOTABLE)) ? 0 : 1; 1521 u8 i = (d && (d->host_flags & IDE_HFLAG_QD_2ND_PORT)) ? 1 : 0;; 1522 1523 /* 1524 * Claim an unassigned slot. 1525 * 1526 * Give preference to claiming other slots before claiming ide0/ide1, 1527 * just in case there's another interface yet-to-be-scanned 1528 * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults). 1529 * 1530 * Unless there is a bootable card that does not use the standard 1531 * ports 0x1f0/0x170 (the ide0/ide1 defaults). 1532 */ 1533 mutex_lock(&ide_cfg_mtx); 1534 if (MAX_HWIFS == 1) { 1535 if (ide_indexes == 0 && i == 0) 1536 idx = 1; 1537 } else { 1538 if (bootable) { 1539 if ((ide_indexes | i) != (1 << MAX_HWIFS) - 1) 1540 idx = ffz(ide_indexes | i); 1541 } else { 1542 if ((ide_indexes | 3) != (1 << MAX_HWIFS) - 1) 1543 idx = ffz(ide_indexes | 3); 1544 else if ((ide_indexes & 3) != 3) 1545 idx = ffz(ide_indexes); 1546 } 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_all(const struct ide_port_info *d, 1563 hw_regs_t **hws) 1564{ 1565 struct ide_host *host; 1566 int i; 1567 1568 host = kzalloc(sizeof(*host), GFP_KERNEL); 1569 if (host == NULL) 1570 return NULL; 1571 1572 for (i = 0; i < MAX_HWIFS; i++) { 1573 ide_hwif_t *hwif; 1574 int idx; 1575 1576 if (hws[i] == NULL) 1577 continue; 1578 1579 hwif = kzalloc(sizeof(*hwif), GFP_KERNEL); 1580 if (hwif == NULL) 1581 continue; 1582 1583 idx = ide_find_port_slot(d); 1584 if (idx < 0) { 1585 printk(KERN_ERR "%s: no free slot for interface\n", 1586 d ? d->name : "ide"); 1587 kfree(hwif); 1588 continue; 1589 } 1590 1591 ide_init_port_data(hwif, idx); 1592 1593 hwif->host = host; 1594 1595 host->ports[i] = hwif; 1596 host->n_ports++; 1597 } 1598 1599 if (host->n_ports == 0) { 1600 kfree(host); 1601 return NULL; 1602 } 1603 1604 if (hws[0]) 1605 host->dev[0] = hws[0]->dev; 1606 1607 if (d) 1608 host->host_flags = d->host_flags; 1609 1610 return host; 1611} 1612EXPORT_SYMBOL_GPL(ide_host_alloc_all); 1613 1614struct ide_host *ide_host_alloc(const struct ide_port_info *d, hw_regs_t **hws) 1615{ 1616 hw_regs_t *hws_all[MAX_HWIFS]; 1617 int i; 1618 1619 for (i = 0; i < MAX_HWIFS; i++) 1620 hws_all[i] = (i < 4) ? hws[i] : NULL; 1621 1622 return ide_host_alloc_all(d, hws_all); 1623} 1624EXPORT_SYMBOL_GPL(ide_host_alloc); 1625 1626int ide_host_register(struct ide_host *host, const struct ide_port_info *d, 1627 hw_regs_t **hws) 1628{ 1629 ide_hwif_t *hwif, *mate = NULL; 1630 int i, j = 0; 1631 1632 for (i = 0; i < MAX_HWIFS; i++) { 1633 hwif = host->ports[i]; 1634 1635 if (hwif == NULL) { 1636 mate = NULL; 1637 continue; 1638 } 1639 1640 ide_init_port_hw(hwif, hws[i]); 1641 ide_port_apply_params(hwif); 1642 1643 if (d == NULL) { 1644 mate = NULL; 1645 continue; 1646 } 1647 1648 if ((i & 1) && mate) { 1649 hwif->mate = mate; 1650 mate->mate = hwif; 1651 } 1652 1653 mate = (i & 1) ? NULL : hwif; 1654 1655 ide_init_port(hwif, i & 1, d); 1656 ide_port_cable_detect(hwif); 1657 ide_port_init_devices(hwif); 1658 } 1659 1660 for (i = 0; i < MAX_HWIFS; i++) { 1661 hwif = host->ports[i]; 1662 1663 if (hwif == NULL) 1664 continue; 1665 1666 if (ide_probe_port(hwif) == 0) 1667 hwif->present = 1; 1668 1669 if (hwif->chipset != ide_4drives || !hwif->mate || 1670 !hwif->mate->present) 1671 ide_register_port(hwif); 1672 1673 if (hwif->present) 1674 ide_port_tune_devices(hwif); 1675 } 1676 1677 for (i = 0; i < MAX_HWIFS; i++) { 1678 hwif = host->ports[i]; 1679 1680 if (hwif == NULL) 1681 continue; 1682 1683 if (hwif_init(hwif) == 0) { 1684 printk(KERN_INFO "%s: failed to initialize IDE " 1685 "interface\n", hwif->name); 1686 hwif->present = 0; 1687 continue; 1688 } 1689 1690 j++; 1691 1692 if (hwif->present) 1693 ide_port_setup_devices(hwif); 1694 1695 ide_acpi_init(hwif); 1696 1697 if (hwif->present) 1698 ide_acpi_port_init_devices(hwif); 1699 } 1700 1701 for (i = 0; i < MAX_HWIFS; i++) { 1702 hwif = host->ports[i]; 1703 1704 if (hwif == NULL) 1705 continue; 1706 1707 if (hwif->chipset == ide_unknown) 1708 hwif->chipset = ide_generic; 1709 1710 if (hwif->present) 1711 hwif_register_devices(hwif); 1712 } 1713 1714 for (i = 0; i < MAX_HWIFS; i++) { 1715 hwif = host->ports[i]; 1716 1717 if (hwif == NULL) 1718 continue; 1719 1720 ide_sysfs_register_port(hwif); 1721 ide_proc_register_port(hwif); 1722 1723 if (hwif->present) 1724 ide_proc_port_register_devices(hwif); 1725 } 1726 1727 return j ? 0 : -1; 1728} 1729EXPORT_SYMBOL_GPL(ide_host_register); 1730 1731int ide_host_add(const struct ide_port_info *d, hw_regs_t **hws, 1732 struct ide_host **hostp) 1733{ 1734 struct ide_host *host; 1735 int rc; 1736 1737 host = ide_host_alloc(d, hws); 1738 if (host == NULL) 1739 return -ENOMEM; 1740 1741 rc = ide_host_register(host, d, hws); 1742 if (rc) { 1743 ide_host_free(host); 1744 return rc; 1745 } 1746 1747 if (hostp) 1748 *hostp = host; 1749 1750 return 0; 1751} 1752EXPORT_SYMBOL_GPL(ide_host_add); 1753 1754void ide_host_free(struct ide_host *host) 1755{ 1756 ide_hwif_t *hwif; 1757 int i; 1758 1759 for (i = 0; i < MAX_HWIFS; i++) { 1760 hwif = host->ports[i]; 1761 1762 if (hwif == NULL) 1763 continue; 1764 1765 ide_free_port_slot(hwif->index); 1766 kfree(hwif); 1767 } 1768 1769 kfree(host); 1770} 1771EXPORT_SYMBOL_GPL(ide_host_free); 1772 1773void ide_host_remove(struct ide_host *host) 1774{ 1775 int i; 1776 1777 for (i = 0; i < MAX_HWIFS; i++) { 1778 if (host->ports[i]) 1779 ide_unregister(host->ports[i]); 1780 } 1781 1782 ide_host_free(host); 1783} 1784EXPORT_SYMBOL_GPL(ide_host_remove); 1785 1786void ide_port_scan(ide_hwif_t *hwif) 1787{ 1788 ide_port_apply_params(hwif); 1789 ide_port_cable_detect(hwif); 1790 ide_port_init_devices(hwif); 1791 1792 if (ide_probe_port(hwif) < 0) 1793 return; 1794 1795 hwif->present = 1; 1796 1797 ide_port_tune_devices(hwif); 1798 ide_acpi_port_init_devices(hwif); 1799 ide_port_setup_devices(hwif); 1800 hwif_register_devices(hwif); 1801 ide_proc_port_register_devices(hwif); 1802} 1803EXPORT_SYMBOL_GPL(ide_port_scan); 1804 1805static void ide_legacy_init_one(hw_regs_t **hws, hw_regs_t *hw, 1806 u8 port_no, const struct ide_port_info *d, 1807 unsigned long config) 1808{ 1809 unsigned long base, ctl; 1810 int irq; 1811 1812 if (port_no == 0) { 1813 base = 0x1f0; 1814 ctl = 0x3f6; 1815 irq = 14; 1816 } else { 1817 base = 0x170; 1818 ctl = 0x376; 1819 irq = 15; 1820 } 1821 1822 if (!request_region(base, 8, d->name)) { 1823 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n", 1824 d->name, base, base + 7); 1825 return; 1826 } 1827 1828 if (!request_region(ctl, 1, d->name)) { 1829 printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n", 1830 d->name, ctl); 1831 release_region(base, 8); 1832 return; 1833 } 1834 1835 ide_std_init_ports(hw, base, ctl); 1836 hw->irq = irq; 1837 hw->chipset = d->chipset; 1838 hw->config = config; 1839 1840 hws[port_no] = hw; 1841} 1842 1843int ide_legacy_device_add(const struct ide_port_info *d, unsigned long config) 1844{ 1845 hw_regs_t hw[2], *hws[] = { NULL, NULL, NULL, NULL }; 1846 1847 memset(&hw, 0, sizeof(hw)); 1848 1849 if ((d->host_flags & IDE_HFLAG_QD_2ND_PORT) == 0) 1850 ide_legacy_init_one(hws, &hw[0], 0, d, config); 1851 ide_legacy_init_one(hws, &hw[1], 1, d, config); 1852 1853 if (hws[0] == NULL && hws[1] == NULL && 1854 (d->host_flags & IDE_HFLAG_SINGLE)) 1855 return -ENOENT; 1856 1857 return ide_host_add(d, hws, NULL); 1858} 1859EXPORT_SYMBOL_GPL(ide_legacy_device_add); 1860