ide-probe.c revision 6f904d015262dfa43eb1cecc00b0998b4c3543f2
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 42static ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */ 43 44/** 45 * generic_id - add a generic drive id 46 * @drive: drive to make an ID block for 47 * 48 * Add a fake id field to the drive we are passed. This allows 49 * use to skip a ton of NULL checks (which people always miss) 50 * and make drive properties unconditional outside of this file 51 */ 52 53static void generic_id(ide_drive_t *drive) 54{ 55 drive->id->cyls = drive->cyl; 56 drive->id->heads = drive->head; 57 drive->id->sectors = drive->sect; 58 drive->id->cur_cyls = drive->cyl; 59 drive->id->cur_heads = drive->head; 60 drive->id->cur_sectors = drive->sect; 61} 62 63static void ide_disk_init_chs(ide_drive_t *drive) 64{ 65 struct hd_driveid *id = drive->id; 66 67 /* Extract geometry if we did not already have one for the drive */ 68 if (!drive->cyl || !drive->head || !drive->sect) { 69 drive->cyl = drive->bios_cyl = id->cyls; 70 drive->head = drive->bios_head = id->heads; 71 drive->sect = drive->bios_sect = id->sectors; 72 } 73 74 /* Handle logical geometry translation by the drive */ 75 if ((id->field_valid & 1) && id->cur_cyls && 76 id->cur_heads && (id->cur_heads <= 16) && id->cur_sectors) { 77 drive->cyl = id->cur_cyls; 78 drive->head = id->cur_heads; 79 drive->sect = id->cur_sectors; 80 } 81 82 /* Use physical geometry if what we have still makes no sense */ 83 if (drive->head > 16 && id->heads && id->heads <= 16) { 84 drive->cyl = id->cyls; 85 drive->head = id->heads; 86 drive->sect = id->sectors; 87 } 88} 89 90static void ide_disk_init_mult_count(ide_drive_t *drive) 91{ 92 struct hd_driveid *id = drive->id; 93 94 drive->mult_count = 0; 95 if (id->max_multsect) { 96#ifdef CONFIG_IDEDISK_MULTI_MODE 97 id->multsect = ((id->max_multsect/2) > 1) ? id->max_multsect : 0; 98 id->multsect_valid = id->multsect ? 1 : 0; 99 drive->mult_req = id->multsect_valid ? id->max_multsect : 0; 100 drive->special.b.set_multmode = drive->mult_req ? 1 : 0; 101#else /* original, pre IDE-NFG, per request of AC */ 102 drive->mult_req = 0; 103 if (drive->mult_req > id->max_multsect) 104 drive->mult_req = id->max_multsect; 105 if (drive->mult_req || ((id->multsect_valid & 1) && id->multsect)) 106 drive->special.b.set_multmode = 1; 107#endif 108 } 109} 110 111/** 112 * do_identify - identify a drive 113 * @drive: drive to identify 114 * @cmd: command used 115 * 116 * Called when we have issued a drive identify command to 117 * read and parse the results. This function is run with 118 * interrupts disabled. 119 */ 120 121static inline void do_identify (ide_drive_t *drive, u8 cmd) 122{ 123 ide_hwif_t *hwif = HWIF(drive); 124 int bswap = 1; 125 struct hd_driveid *id; 126 127 id = drive->id; 128 /* read 512 bytes of id info */ 129 hwif->tp_ops->input_data(drive, NULL, id, SECTOR_SIZE); 130 131 drive->id_read = 1; 132 local_irq_enable(); 133#ifdef DEBUG 134 printk(KERN_INFO "%s: dumping identify data\n", drive->name); 135 ide_dump_identify((u8 *)id); 136#endif 137 ide_fix_driveid(id); 138 139#if defined (CONFIG_SCSI_EATA_PIO) || defined (CONFIG_SCSI_EATA) 140 /* 141 * EATA SCSI controllers do a hardware ATA emulation: 142 * Ignore them if there is a driver for them available. 143 */ 144 if ((id->model[0] == 'P' && id->model[1] == 'M') || 145 (id->model[0] == 'S' && id->model[1] == 'K')) { 146 printk("%s: EATA SCSI HBA %.10s\n", drive->name, id->model); 147 goto err_misc; 148 } 149#endif /* CONFIG_SCSI_EATA || CONFIG_SCSI_EATA_PIO */ 150 151 /* 152 * WIN_IDENTIFY returns little-endian info, 153 * WIN_PIDENTIFY *usually* returns little-endian info. 154 */ 155 if (cmd == WIN_PIDENTIFY) { 156 if ((id->model[0] == 'N' && id->model[1] == 'E') /* NEC */ 157 || (id->model[0] == 'F' && id->model[1] == 'X') /* Mitsumi */ 158 || (id->model[0] == 'P' && id->model[1] == 'i'))/* Pioneer */ 159 /* Vertos drives may still be weird */ 160 bswap ^= 1; 161 } 162 ide_fixstring(id->model, sizeof(id->model), bswap); 163 ide_fixstring(id->fw_rev, sizeof(id->fw_rev), bswap); 164 ide_fixstring(id->serial_no, sizeof(id->serial_no), bswap); 165 166 /* we depend on this a lot! */ 167 id->model[sizeof(id->model)-1] = '\0'; 168 169 if (strstr(id->model, "E X A B Y T E N E S T")) 170 goto err_misc; 171 172 printk("%s: %s, ", drive->name, id->model); 173 drive->present = 1; 174 drive->dead = 0; 175 176 /* 177 * Check for an ATAPI device 178 */ 179 if (cmd == WIN_PIDENTIFY) { 180 u8 type = (id->config >> 8) & 0x1f; 181 printk("ATAPI "); 182 switch (type) { 183 case ide_floppy: 184 if (!strstr(id->model, "CD-ROM")) { 185 if (!strstr(id->model, "oppy") && 186 !strstr(id->model, "poyp") && 187 !strstr(id->model, "ZIP")) 188 printk("cdrom or floppy?, assuming "); 189 if (drive->media != ide_cdrom) { 190 printk ("FLOPPY"); 191 drive->removable = 1; 192 break; 193 } 194 } 195 /* Early cdrom models used zero */ 196 type = ide_cdrom; 197 case ide_cdrom: 198 drive->removable = 1; 199#ifdef CONFIG_PPC 200 /* kludge for Apple PowerBook internal zip */ 201 if (!strstr(id->model, "CD-ROM") && 202 strstr(id->model, "ZIP")) { 203 printk ("FLOPPY"); 204 type = ide_floppy; 205 break; 206 } 207#endif 208 printk ("CD/DVD-ROM"); 209 break; 210 case ide_tape: 211 printk ("TAPE"); 212 break; 213 case ide_optical: 214 printk ("OPTICAL"); 215 drive->removable = 1; 216 break; 217 default: 218 printk("UNKNOWN (type %d)", type); 219 break; 220 } 221 printk (" drive\n"); 222 drive->media = type; 223 /* an ATAPI device ignores DRDY */ 224 drive->ready_stat = 0; 225 return; 226 } 227 228 /* 229 * Not an ATAPI device: looks like a "regular" hard disk 230 */ 231 232 /* 233 * 0x848a = CompactFlash device 234 * These are *not* removable in Linux definition of the term 235 */ 236 237 if ((id->config != 0x848a) && (id->config & (1<<7))) 238 drive->removable = 1; 239 240 drive->media = ide_disk; 241 printk("%s DISK drive\n", (id->config == 0x848a) ? "CFA" : "ATA" ); 242 243 return; 244 245err_misc: 246 kfree(id); 247 drive->present = 0; 248 return; 249} 250 251/** 252 * actual_try_to_identify - send ata/atapi identify 253 * @drive: drive to identify 254 * @cmd: command to use 255 * 256 * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive 257 * and waits for a response. It also monitors irqs while this is 258 * happening, in hope of automatically determining which one is 259 * being used by the interface. 260 * 261 * Returns: 0 device was identified 262 * 1 device timed-out (no response to identify request) 263 * 2 device aborted the command (refused to identify itself) 264 */ 265 266static int actual_try_to_identify (ide_drive_t *drive, u8 cmd) 267{ 268 ide_hwif_t *hwif = HWIF(drive); 269 struct ide_io_ports *io_ports = &hwif->io_ports; 270 const struct ide_tp_ops *tp_ops = hwif->tp_ops; 271 int use_altstatus = 0, rc; 272 unsigned long timeout; 273 u8 s = 0, a = 0; 274 275 /* take a deep breath */ 276 msleep(50); 277 278 if (io_ports->ctl_addr) { 279 a = tp_ops->read_altstatus(hwif); 280 s = tp_ops->read_status(hwif); 281 if ((a ^ s) & ~INDEX_STAT) 282 /* ancient Seagate drives, broken interfaces */ 283 printk(KERN_INFO "%s: probing with STATUS(0x%02x) " 284 "instead of ALTSTATUS(0x%02x)\n", 285 drive->name, s, a); 286 else 287 /* use non-intrusive polling */ 288 use_altstatus = 1; 289 } 290 291 /* set features register for atapi 292 * identify command to be sure of reply 293 */ 294 if (cmd == WIN_PIDENTIFY) { 295 ide_task_t task; 296 297 memset(&task, 0, sizeof(task)); 298 /* disable DMA & overlap */ 299 task.tf_flags = IDE_TFLAG_OUT_FEATURE; 300 301 tp_ops->tf_load(drive, &task); 302 } 303 304 /* ask drive for ID */ 305 tp_ops->exec_command(hwif, cmd); 306 307 timeout = ((cmd == WIN_IDENTIFY) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2; 308 timeout += jiffies; 309 do { 310 if (time_after(jiffies, timeout)) { 311 /* drive timed-out */ 312 return 1; 313 } 314 /* give drive a breather */ 315 msleep(50); 316 s = use_altstatus ? tp_ops->read_altstatus(hwif) 317 : tp_ops->read_status(hwif); 318 } while (s & BUSY_STAT); 319 320 /* wait for IRQ and DRQ_STAT */ 321 msleep(50); 322 s = tp_ops->read_status(hwif); 323 324 if (OK_STAT(s, DRQ_STAT, BAD_R_STAT)) { 325 unsigned long flags; 326 327 /* local CPU only; some systems need this */ 328 local_irq_save(flags); 329 /* drive returned ID */ 330 do_identify(drive, cmd); 331 /* drive responded with ID */ 332 rc = 0; 333 /* clear drive IRQ */ 334 (void)tp_ops->read_status(hwif); 335 local_irq_restore(flags); 336 } else { 337 /* drive refused ID */ 338 rc = 2; 339 } 340 return rc; 341} 342 343/** 344 * try_to_identify - try to identify a drive 345 * @drive: drive to probe 346 * @cmd: command to use 347 * 348 * Issue the identify command and then do IRQ probing to 349 * complete the identification when needed by finding the 350 * IRQ the drive is attached to 351 */ 352 353static int try_to_identify (ide_drive_t *drive, u8 cmd) 354{ 355 ide_hwif_t *hwif = HWIF(drive); 356 const struct ide_tp_ops *tp_ops = hwif->tp_ops; 357 int retval; 358 int autoprobe = 0; 359 unsigned long cookie = 0; 360 361 /* 362 * Disable device irq unless we need to 363 * probe for it. Otherwise we'll get spurious 364 * interrupts during the identify-phase that 365 * the irq handler isn't expecting. 366 */ 367 if (hwif->io_ports.ctl_addr) { 368 if (!hwif->irq) { 369 autoprobe = 1; 370 cookie = probe_irq_on(); 371 } 372 tp_ops->set_irq(hwif, autoprobe); 373 } 374 375 retval = actual_try_to_identify(drive, cmd); 376 377 if (autoprobe) { 378 int irq; 379 380 tp_ops->set_irq(hwif, 0); 381 /* clear drive IRQ */ 382 (void)tp_ops->read_status(hwif); 383 udelay(5); 384 irq = probe_irq_off(cookie); 385 if (!hwif->irq) { 386 if (irq > 0) { 387 hwif->irq = irq; 388 } else { 389 /* Mmmm.. multiple IRQs.. 390 * don't know which was ours 391 */ 392 printk("%s: IRQ probe failed (0x%lx)\n", 393 drive->name, cookie); 394 } 395 } 396 } 397 return retval; 398} 399 400static int ide_busy_sleep(ide_hwif_t *hwif) 401{ 402 unsigned long timeout = jiffies + WAIT_WORSTCASE; 403 u8 stat; 404 405 do { 406 msleep(50); 407 stat = hwif->tp_ops->read_status(hwif); 408 if ((stat & BUSY_STAT) == 0) 409 return 0; 410 } while (time_before(jiffies, timeout)); 411 412 return 1; 413} 414 415static u8 ide_read_device(ide_drive_t *drive) 416{ 417 ide_task_t task; 418 419 memset(&task, 0, sizeof(task)); 420 task.tf_flags = IDE_TFLAG_IN_DEVICE; 421 422 drive->hwif->tp_ops->tf_read(drive, &task); 423 424 return task.tf.device; 425} 426 427/** 428 * do_probe - probe an IDE device 429 * @drive: drive to probe 430 * @cmd: command to use 431 * 432 * do_probe() has the difficult job of finding a drive if it exists, 433 * without getting hung up if it doesn't exist, without trampling on 434 * ethernet cards, and without leaving any IRQs dangling to haunt us later. 435 * 436 * If a drive is "known" to exist (from CMOS or kernel parameters), 437 * but does not respond right away, the probe will "hang in there" 438 * for the maximum wait time (about 30 seconds), otherwise it will 439 * exit much more quickly. 440 * 441 * Returns: 0 device was identified 442 * 1 device timed-out (no response to identify request) 443 * 2 device aborted the command (refused to identify itself) 444 * 3 bad status from device (possible for ATAPI drives) 445 * 4 probe was not attempted because failure was obvious 446 */ 447 448static int do_probe (ide_drive_t *drive, u8 cmd) 449{ 450 ide_hwif_t *hwif = HWIF(drive); 451 const struct ide_tp_ops *tp_ops = hwif->tp_ops; 452 int rc; 453 u8 stat; 454 455 if (drive->present) { 456 /* avoid waiting for inappropriate probes */ 457 if ((drive->media != ide_disk) && (cmd == WIN_IDENTIFY)) 458 return 4; 459 } 460#ifdef DEBUG 461 printk("probing for %s: present=%d, media=%d, probetype=%s\n", 462 drive->name, drive->present, drive->media, 463 (cmd == WIN_IDENTIFY) ? "ATA" : "ATAPI"); 464#endif 465 466 /* needed for some systems 467 * (e.g. crw9624 as drive0 with disk as slave) 468 */ 469 msleep(50); 470 SELECT_DRIVE(drive); 471 msleep(50); 472 473 if (ide_read_device(drive) != drive->select.all && !drive->present) { 474 if (drive->select.b.unit != 0) { 475 /* exit with drive0 selected */ 476 SELECT_DRIVE(&hwif->drives[0]); 477 /* allow BUSY_STAT to assert & clear */ 478 msleep(50); 479 } 480 /* no i/f present: mmm.. this should be a 4 -ml */ 481 return 3; 482 } 483 484 stat = tp_ops->read_status(hwif); 485 486 if (OK_STAT(stat, READY_STAT, BUSY_STAT) || 487 drive->present || cmd == WIN_PIDENTIFY) { 488 /* send cmd and wait */ 489 if ((rc = try_to_identify(drive, cmd))) { 490 /* failed: try again */ 491 rc = try_to_identify(drive,cmd); 492 } 493 494 stat = tp_ops->read_status(hwif); 495 496 if (stat == (BUSY_STAT | READY_STAT)) 497 return 4; 498 499 if (rc == 1 && cmd == WIN_PIDENTIFY) { 500 printk(KERN_ERR "%s: no response (status = 0x%02x), " 501 "resetting drive\n", drive->name, stat); 502 msleep(50); 503 SELECT_DRIVE(drive); 504 msleep(50); 505 tp_ops->exec_command(hwif, WIN_SRST); 506 (void)ide_busy_sleep(hwif); 507 rc = try_to_identify(drive, cmd); 508 } 509 510 /* ensure drive IRQ is clear */ 511 stat = tp_ops->read_status(hwif); 512 513 if (rc == 1) 514 printk(KERN_ERR "%s: no response (status = 0x%02x)\n", 515 drive->name, stat); 516 } else { 517 /* not present or maybe ATAPI */ 518 rc = 3; 519 } 520 if (drive->select.b.unit != 0) { 521 /* exit with drive0 selected */ 522 SELECT_DRIVE(&hwif->drives[0]); 523 msleep(50); 524 /* ensure drive irq is clear */ 525 (void)tp_ops->read_status(hwif); 526 } 527 return rc; 528} 529 530/* 531 * 532 */ 533static void enable_nest (ide_drive_t *drive) 534{ 535 ide_hwif_t *hwif = HWIF(drive); 536 const struct ide_tp_ops *tp_ops = hwif->tp_ops; 537 u8 stat; 538 539 printk("%s: enabling %s -- ", hwif->name, drive->id->model); 540 SELECT_DRIVE(drive); 541 msleep(50); 542 tp_ops->exec_command(hwif, EXABYTE_ENABLE_NEST); 543 544 if (ide_busy_sleep(hwif)) { 545 printk(KERN_CONT "failed (timeout)\n"); 546 return; 547 } 548 549 msleep(50); 550 551 stat = tp_ops->read_status(hwif); 552 553 if (!OK_STAT(stat, 0, BAD_STAT)) 554 printk(KERN_CONT "failed (status = 0x%02x)\n", stat); 555 else 556 printk(KERN_CONT "success\n"); 557 558 /* if !(success||timed-out) */ 559 if (do_probe(drive, WIN_IDENTIFY) >= 2) { 560 /* look for ATAPI device */ 561 (void) do_probe(drive, WIN_PIDENTIFY); 562 } 563} 564 565/** 566 * probe_for_drives - upper level drive probe 567 * @drive: drive to probe for 568 * 569 * probe_for_drive() tests for existence of a given drive using do_probe() 570 * and presents things to the user as needed. 571 * 572 * Returns: 0 no device was found 573 * 1 device was found (note: drive->present might 574 * still be 0) 575 */ 576 577static inline u8 probe_for_drive (ide_drive_t *drive) 578{ 579 /* 580 * In order to keep things simple we have an id 581 * block for all drives at all times. If the device 582 * is pre ATA or refuses ATA/ATAPI identify we 583 * will add faked data to this. 584 * 585 * Also note that 0 everywhere means "can't do X" 586 */ 587 588 drive->id = kzalloc(SECTOR_WORDS *4, GFP_KERNEL); 589 drive->id_read = 0; 590 if(drive->id == NULL) 591 { 592 printk(KERN_ERR "ide: out of memory for id data.\n"); 593 return 0; 594 } 595 strcpy(drive->id->model, "UNKNOWN"); 596 597 /* skip probing? */ 598 if (!drive->noprobe) 599 { 600 /* if !(success||timed-out) */ 601 if (do_probe(drive, WIN_IDENTIFY) >= 2) { 602 /* look for ATAPI device */ 603 (void) do_probe(drive, WIN_PIDENTIFY); 604 } 605 if (!drive->present) 606 /* drive not found */ 607 return 0; 608 if (strstr(drive->id->model, "E X A B Y T E N E S T")) 609 enable_nest(drive); 610 611 /* identification failed? */ 612 if (!drive->id_read) { 613 if (drive->media == ide_disk) { 614 printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n", 615 drive->name, drive->cyl, 616 drive->head, drive->sect); 617 } else if (drive->media == ide_cdrom) { 618 printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name); 619 } else { 620 /* nuke it */ 621 printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name); 622 drive->present = 0; 623 } 624 } 625 /* drive was found */ 626 } 627 if(!drive->present) 628 return 0; 629 /* The drive wasn't being helpful. Add generic info only */ 630 if (drive->id_read == 0) { 631 generic_id(drive); 632 return 1; 633 } 634 635 if (drive->media == ide_disk) { 636 ide_disk_init_chs(drive); 637 ide_disk_init_mult_count(drive); 638 } 639 640 return drive->present; 641} 642 643static void hwif_release_dev (struct device *dev) 644{ 645 ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev); 646 647 complete(&hwif->gendev_rel_comp); 648} 649 650static int ide_register_port(ide_hwif_t *hwif) 651{ 652 int ret; 653 654 /* register with global device tree */ 655 strlcpy(hwif->gendev.bus_id,hwif->name,BUS_ID_SIZE); 656 hwif->gendev.driver_data = hwif; 657 if (hwif->gendev.parent == NULL) { 658 if (hwif->dev) 659 hwif->gendev.parent = hwif->dev; 660 else 661 /* Would like to do = &device_legacy */ 662 hwif->gendev.parent = NULL; 663 } 664 hwif->gendev.release = hwif_release_dev; 665 ret = device_register(&hwif->gendev); 666 if (ret < 0) { 667 printk(KERN_WARNING "IDE: %s: device_register error: %d\n", 668 __func__, ret); 669 goto out; 670 } 671 672 hwif->portdev = device_create_drvdata(ide_port_class, &hwif->gendev, 673 MKDEV(0, 0), hwif, hwif->name); 674 if (IS_ERR(hwif->portdev)) { 675 ret = PTR_ERR(hwif->portdev); 676 device_unregister(&hwif->gendev); 677 } 678out: 679 return ret; 680} 681 682/** 683 * ide_port_wait_ready - wait for port to become ready 684 * @hwif: IDE port 685 * 686 * This is needed on some PPCs and a bunch of BIOS-less embedded 687 * platforms. Typical cases are: 688 * 689 * - The firmware hard reset the disk before booting the kernel, 690 * the drive is still doing it's poweron-reset sequence, that 691 * can take up to 30 seconds. 692 * 693 * - The firmware does nothing (or no firmware), the device is 694 * still in POST state (same as above actually). 695 * 696 * - Some CD/DVD/Writer combo drives tend to drive the bus during 697 * their reset sequence even when they are non-selected slave 698 * devices, thus preventing discovery of the main HD. 699 * 700 * Doing this wait-for-non-busy should not harm any existing 701 * configuration and fix some issues like the above. 702 * 703 * BenH. 704 * 705 * Returns 0 on success, error code (< 0) otherwise. 706 */ 707 708static int ide_port_wait_ready(ide_hwif_t *hwif) 709{ 710 int unit, rc; 711 712 printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name); 713 714 /* Let HW settle down a bit from whatever init state we 715 * come from */ 716 mdelay(2); 717 718 /* Wait for BSY bit to go away, spec timeout is 30 seconds, 719 * I know of at least one disk who takes 31 seconds, I use 35 720 * here to be safe 721 */ 722 rc = ide_wait_not_busy(hwif, 35000); 723 if (rc) 724 return rc; 725 726 /* Now make sure both master & slave are ready */ 727 for (unit = 0; unit < MAX_DRIVES; unit++) { 728 ide_drive_t *drive = &hwif->drives[unit]; 729 730 /* Ignore disks that we will not probe for later. */ 731 if (!drive->noprobe || drive->present) { 732 SELECT_DRIVE(drive); 733 hwif->tp_ops->set_irq(hwif, 1); 734 mdelay(2); 735 rc = ide_wait_not_busy(hwif, 35000); 736 if (rc) 737 goto out; 738 } else 739 printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n", 740 drive->name); 741 } 742out: 743 /* Exit function with master reselected (let's be sane) */ 744 if (unit) 745 SELECT_DRIVE(&hwif->drives[0]); 746 747 return rc; 748} 749 750/** 751 * ide_undecoded_slave - look for bad CF adapters 752 * @drive1: drive 753 * 754 * Analyse the drives on the interface and attempt to decide if we 755 * have the same drive viewed twice. This occurs with crap CF adapters 756 * and PCMCIA sometimes. 757 */ 758 759void ide_undecoded_slave(ide_drive_t *drive1) 760{ 761 ide_drive_t *drive0 = &drive1->hwif->drives[0]; 762 763 if ((drive1->dn & 1) == 0 || drive0->present == 0) 764 return; 765 766 /* If the models don't match they are not the same product */ 767 if (strcmp(drive0->id->model, drive1->id->model)) 768 return; 769 770 /* Serial numbers do not match */ 771 if (strncmp(drive0->id->serial_no, drive1->id->serial_no, 20)) 772 return; 773 774 /* No serial number, thankfully very rare for CF */ 775 if (drive0->id->serial_no[0] == 0) 776 return; 777 778 /* Appears to be an IDE flash adapter with decode bugs */ 779 printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n"); 780 781 drive1->present = 0; 782} 783 784EXPORT_SYMBOL_GPL(ide_undecoded_slave); 785 786static int ide_probe_port(ide_hwif_t *hwif) 787{ 788 unsigned long flags; 789 unsigned int irqd; 790 int unit, rc = -ENODEV; 791 792 BUG_ON(hwif->present); 793 794 if (hwif->drives[0].noprobe && hwif->drives[1].noprobe) 795 return -EACCES; 796 797 /* 798 * We must always disable IRQ, as probe_for_drive will assert IRQ, but 799 * we'll install our IRQ driver much later... 800 */ 801 irqd = hwif->irq; 802 if (irqd) 803 disable_irq(hwif->irq); 804 805 local_irq_set(flags); 806 807 if (ide_port_wait_ready(hwif) == -EBUSY) 808 printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name); 809 810 /* 811 * Second drive should only exist if first drive was found, 812 * but a lot of cdrom drives are configured as single slaves. 813 */ 814 for (unit = 0; unit < MAX_DRIVES; ++unit) { 815 ide_drive_t *drive = &hwif->drives[unit]; 816 drive->dn = (hwif->channel ? 2 : 0) + unit; 817 (void) probe_for_drive(drive); 818 if (drive->present) 819 rc = 0; 820 } 821 822 local_irq_restore(flags); 823 824 /* 825 * Use cached IRQ number. It might be (and is...) changed by probe 826 * code above 827 */ 828 if (irqd) 829 enable_irq(irqd); 830 831 return rc; 832} 833 834static void ide_port_tune_devices(ide_hwif_t *hwif) 835{ 836 const struct ide_port_ops *port_ops = hwif->port_ops; 837 int unit; 838 839 for (unit = 0; unit < MAX_DRIVES; unit++) { 840 ide_drive_t *drive = &hwif->drives[unit]; 841 842 if (drive->present && port_ops && port_ops->quirkproc) 843 port_ops->quirkproc(drive); 844 } 845 846 for (unit = 0; unit < MAX_DRIVES; ++unit) { 847 ide_drive_t *drive = &hwif->drives[unit]; 848 849 if (drive->present) { 850 ide_set_max_pio(drive); 851 852 drive->nice1 = 1; 853 854 if (hwif->dma_ops) 855 ide_set_dma(drive); 856 } 857 } 858 859 for (unit = 0; unit < MAX_DRIVES; ++unit) { 860 ide_drive_t *drive = &hwif->drives[unit]; 861 862 if (hwif->host_flags & IDE_HFLAG_NO_IO_32BIT) 863 drive->no_io_32bit = 1; 864 else 865 drive->no_io_32bit = drive->id->dword_io ? 1 : 0; 866 } 867} 868 869#if MAX_HWIFS > 1 870/* 871 * save_match() is used to simplify logic in init_irq() below. 872 * 873 * A loophole here is that we may not know about a particular 874 * hwif's irq until after that hwif is actually probed/initialized.. 875 * This could be a problem for the case where an hwif is on a 876 * dual interface that requires serialization (eg. cmd640) and another 877 * hwif using one of the same irqs is initialized beforehand. 878 * 879 * This routine detects and reports such situations, but does not fix them. 880 */ 881static void save_match(ide_hwif_t *hwif, ide_hwif_t *new, ide_hwif_t **match) 882{ 883 ide_hwif_t *m = *match; 884 885 if (m && m->hwgroup && m->hwgroup != new->hwgroup) { 886 if (!new->hwgroup) 887 return; 888 printk("%s: potential irq problem with %s and %s\n", 889 hwif->name, new->name, m->name); 890 } 891 if (!m || m->irq != hwif->irq) /* don't undo a prior perfect match */ 892 *match = new; 893} 894#endif /* MAX_HWIFS > 1 */ 895 896/* 897 * init request queue 898 */ 899static int ide_init_queue(ide_drive_t *drive) 900{ 901 struct request_queue *q; 902 ide_hwif_t *hwif = HWIF(drive); 903 int max_sectors = 256; 904 int max_sg_entries = PRD_ENTRIES; 905 906 /* 907 * Our default set up assumes the normal IDE case, 908 * that is 64K segmenting, standard PRD setup 909 * and LBA28. Some drivers then impose their own 910 * limits and LBA48 we could raise it but as yet 911 * do not. 912 */ 913 914 q = blk_init_queue_node(do_ide_request, &ide_lock, hwif_to_node(hwif)); 915 if (!q) 916 return 1; 917 918 q->queuedata = drive; 919 blk_queue_segment_boundary(q, 0xffff); 920 921 if (hwif->rqsize < max_sectors) 922 max_sectors = hwif->rqsize; 923 blk_queue_max_sectors(q, max_sectors); 924 925#ifdef CONFIG_PCI 926 /* When we have an IOMMU, we may have a problem where pci_map_sg() 927 * creates segments that don't completely match our boundary 928 * requirements and thus need to be broken up again. Because it 929 * doesn't align properly either, we may actually have to break up 930 * to more segments than what was we got in the first place, a max 931 * worst case is twice as many. 932 * This will be fixed once we teach pci_map_sg() about our boundary 933 * requirements, hopefully soon. *FIXME* 934 */ 935 if (!PCI_DMA_BUS_IS_PHYS) 936 max_sg_entries >>= 1; 937#endif /* CONFIG_PCI */ 938 939 blk_queue_max_hw_segments(q, max_sg_entries); 940 blk_queue_max_phys_segments(q, max_sg_entries); 941 942 /* assign drive queue */ 943 drive->queue = q; 944 945 /* needs drive->queue to be set */ 946 ide_toggle_bounce(drive, 1); 947 948 return 0; 949} 950 951static void ide_add_drive_to_hwgroup(ide_drive_t *drive) 952{ 953 ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; 954 955 spin_lock_irq(&ide_lock); 956 if (!hwgroup->drive) { 957 /* first drive for hwgroup. */ 958 drive->next = drive; 959 hwgroup->drive = drive; 960 hwgroup->hwif = HWIF(hwgroup->drive); 961 } else { 962 drive->next = hwgroup->drive->next; 963 hwgroup->drive->next = drive; 964 } 965 spin_unlock_irq(&ide_lock); 966} 967 968/* 969 * For any present drive: 970 * - allocate the block device queue 971 * - link drive into the hwgroup 972 */ 973static void ide_port_setup_devices(ide_hwif_t *hwif) 974{ 975 int i; 976 977 mutex_lock(&ide_cfg_mtx); 978 for (i = 0; i < MAX_DRIVES; i++) { 979 ide_drive_t *drive = &hwif->drives[i]; 980 981 if (!drive->present) 982 continue; 983 984 if (ide_init_queue(drive)) { 985 printk(KERN_ERR "ide: failed to init %s\n", 986 drive->name); 987 continue; 988 } 989 990 ide_add_drive_to_hwgroup(drive); 991 } 992 mutex_unlock(&ide_cfg_mtx); 993} 994 995/* 996 * This routine sets up the irq for an ide interface, and creates a new 997 * hwgroup for the irq/hwif if none was previously assigned. 998 * 999 * Much of the code is for correctly detecting/handling irq sharing 1000 * and irq serialization situations. This is somewhat complex because 1001 * it handles static as well as dynamic (PCMCIA) IDE interfaces. 1002 */ 1003static int init_irq (ide_hwif_t *hwif) 1004{ 1005 struct ide_io_ports *io_ports = &hwif->io_ports; 1006 unsigned int index; 1007 ide_hwgroup_t *hwgroup; 1008 ide_hwif_t *match = NULL; 1009 1010 1011 BUG_ON(in_interrupt()); 1012 BUG_ON(irqs_disabled()); 1013 BUG_ON(hwif == NULL); 1014 1015 mutex_lock(&ide_cfg_mtx); 1016 hwif->hwgroup = NULL; 1017#if MAX_HWIFS > 1 1018 /* 1019 * Group up with any other hwifs that share our irq(s). 1020 */ 1021 for (index = 0; index < MAX_HWIFS; index++) { 1022 ide_hwif_t *h = &ide_hwifs[index]; 1023 if (h->hwgroup) { /* scan only initialized hwif's */ 1024 if (hwif->irq == h->irq) { 1025 hwif->sharing_irq = h->sharing_irq = 1; 1026 if (hwif->chipset != ide_pci || 1027 h->chipset != ide_pci) { 1028 save_match(hwif, h, &match); 1029 } 1030 } 1031 if (hwif->serialized) { 1032 if (hwif->mate && hwif->mate->irq == h->irq) 1033 save_match(hwif, h, &match); 1034 } 1035 if (h->serialized) { 1036 if (h->mate && hwif->irq == h->mate->irq) 1037 save_match(hwif, h, &match); 1038 } 1039 } 1040 } 1041#endif /* MAX_HWIFS > 1 */ 1042 /* 1043 * If we are still without a hwgroup, then form a new one 1044 */ 1045 if (match) { 1046 hwgroup = match->hwgroup; 1047 hwif->hwgroup = hwgroup; 1048 /* 1049 * Link us into the hwgroup. 1050 * This must be done early, do ensure that unexpected_intr 1051 * can find the hwif and prevent irq storms. 1052 * No drives are attached to the new hwif, choose_drive 1053 * can't do anything stupid (yet). 1054 * Add ourself as the 2nd entry to the hwgroup->hwif 1055 * linked list, the first entry is the hwif that owns 1056 * hwgroup->handler - do not change that. 1057 */ 1058 spin_lock_irq(&ide_lock); 1059 hwif->next = hwgroup->hwif->next; 1060 hwgroup->hwif->next = hwif; 1061 BUG_ON(hwif->next == hwif); 1062 spin_unlock_irq(&ide_lock); 1063 } else { 1064 hwgroup = kmalloc_node(sizeof(*hwgroup), GFP_KERNEL|__GFP_ZERO, 1065 hwif_to_node(hwif)); 1066 if (hwgroup == NULL) 1067 goto out_up; 1068 1069 hwif->hwgroup = hwgroup; 1070 hwgroup->hwif = hwif->next = hwif; 1071 1072 init_timer(&hwgroup->timer); 1073 hwgroup->timer.function = &ide_timer_expiry; 1074 hwgroup->timer.data = (unsigned long) hwgroup; 1075 } 1076 1077 /* 1078 * Allocate the irq, if not already obtained for another hwif 1079 */ 1080 if (!match || match->irq != hwif->irq) { 1081 int sa = 0; 1082#if defined(__mc68000__) 1083 sa = IRQF_SHARED; 1084#endif /* __mc68000__ */ 1085 1086 if (IDE_CHIPSET_IS_PCI(hwif->chipset)) 1087 sa = IRQF_SHARED; 1088 1089 if (io_ports->ctl_addr) 1090 hwif->tp_ops->set_irq(hwif, 1); 1091 1092 if (request_irq(hwif->irq,&ide_intr,sa,hwif->name,hwgroup)) 1093 goto out_unlink; 1094 } 1095 1096 if (!hwif->rqsize) { 1097 if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) || 1098 (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA)) 1099 hwif->rqsize = 256; 1100 else 1101 hwif->rqsize = 65536; 1102 } 1103 1104#if !defined(__mc68000__) 1105 printk("%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name, 1106 io_ports->data_addr, io_ports->status_addr, 1107 io_ports->ctl_addr, hwif->irq); 1108#else 1109 printk("%s at 0x%08lx on irq %d", hwif->name, 1110 io_ports->data_addr, hwif->irq); 1111#endif /* __mc68000__ */ 1112 if (match) 1113 printk(" (%sed with %s)", 1114 hwif->sharing_irq ? "shar" : "serializ", match->name); 1115 printk("\n"); 1116 1117 mutex_unlock(&ide_cfg_mtx); 1118 return 0; 1119out_unlink: 1120 ide_remove_port_from_hwgroup(hwif); 1121out_up: 1122 mutex_unlock(&ide_cfg_mtx); 1123 return 1; 1124} 1125 1126static int ata_lock(dev_t dev, void *data) 1127{ 1128 /* FIXME: we want to pin hwif down */ 1129 return 0; 1130} 1131 1132static struct kobject *ata_probe(dev_t dev, int *part, void *data) 1133{ 1134 ide_hwif_t *hwif = data; 1135 int unit = *part >> PARTN_BITS; 1136 ide_drive_t *drive = &hwif->drives[unit]; 1137 if (!drive->present) 1138 return NULL; 1139 1140 if (drive->media == ide_disk) 1141 request_module("ide-disk"); 1142 if (drive->scsi) 1143 request_module("ide-scsi"); 1144 if (drive->media == ide_cdrom || drive->media == ide_optical) 1145 request_module("ide-cd"); 1146 if (drive->media == ide_tape) 1147 request_module("ide-tape"); 1148 if (drive->media == ide_floppy) 1149 request_module("ide-floppy"); 1150 1151 return NULL; 1152} 1153 1154static struct kobject *exact_match(dev_t dev, int *part, void *data) 1155{ 1156 struct gendisk *p = data; 1157 *part &= (1 << PARTN_BITS) - 1; 1158 return &p->dev.kobj; 1159} 1160 1161static int exact_lock(dev_t dev, void *data) 1162{ 1163 struct gendisk *p = data; 1164 1165 if (!get_disk(p)) 1166 return -1; 1167 return 0; 1168} 1169 1170void ide_register_region(struct gendisk *disk) 1171{ 1172 blk_register_region(MKDEV(disk->major, disk->first_minor), 1173 disk->minors, NULL, exact_match, exact_lock, disk); 1174} 1175 1176EXPORT_SYMBOL_GPL(ide_register_region); 1177 1178void ide_unregister_region(struct gendisk *disk) 1179{ 1180 blk_unregister_region(MKDEV(disk->major, disk->first_minor), 1181 disk->minors); 1182} 1183 1184EXPORT_SYMBOL_GPL(ide_unregister_region); 1185 1186void ide_init_disk(struct gendisk *disk, ide_drive_t *drive) 1187{ 1188 ide_hwif_t *hwif = drive->hwif; 1189 unsigned int unit = (drive->select.all >> 4) & 1; 1190 1191 disk->major = hwif->major; 1192 disk->first_minor = unit << PARTN_BITS; 1193 sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit); 1194 disk->queue = drive->queue; 1195} 1196 1197EXPORT_SYMBOL_GPL(ide_init_disk); 1198 1199static void ide_remove_drive_from_hwgroup(ide_drive_t *drive) 1200{ 1201 ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; 1202 1203 if (drive == drive->next) { 1204 /* special case: last drive from hwgroup. */ 1205 BUG_ON(hwgroup->drive != drive); 1206 hwgroup->drive = NULL; 1207 } else { 1208 ide_drive_t *walk; 1209 1210 walk = hwgroup->drive; 1211 while (walk->next != drive) 1212 walk = walk->next; 1213 walk->next = drive->next; 1214 if (hwgroup->drive == drive) { 1215 hwgroup->drive = drive->next; 1216 hwgroup->hwif = hwgroup->drive->hwif; 1217 } 1218 } 1219 BUG_ON(hwgroup->drive == drive); 1220} 1221 1222static void drive_release_dev (struct device *dev) 1223{ 1224 ide_drive_t *drive = container_of(dev, ide_drive_t, gendev); 1225 1226 ide_proc_unregister_device(drive); 1227 1228 spin_lock_irq(&ide_lock); 1229 ide_remove_drive_from_hwgroup(drive); 1230 kfree(drive->id); 1231 drive->id = NULL; 1232 drive->present = 0; 1233 /* Messed up locking ... */ 1234 spin_unlock_irq(&ide_lock); 1235 blk_cleanup_queue(drive->queue); 1236 spin_lock_irq(&ide_lock); 1237 drive->queue = NULL; 1238 spin_unlock_irq(&ide_lock); 1239 1240 complete(&drive->gendev_rel_comp); 1241} 1242 1243static int hwif_init(ide_hwif_t *hwif) 1244{ 1245 int old_irq; 1246 1247 if (!hwif->irq) { 1248 hwif->irq = __ide_default_irq(hwif->io_ports.data_addr); 1249 if (!hwif->irq) { 1250 printk("%s: DISABLED, NO IRQ\n", hwif->name); 1251 return 0; 1252 } 1253 } 1254 1255 if (register_blkdev(hwif->major, hwif->name)) 1256 return 0; 1257 1258 if (!hwif->sg_max_nents) 1259 hwif->sg_max_nents = PRD_ENTRIES; 1260 1261 hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents, 1262 GFP_KERNEL); 1263 if (!hwif->sg_table) { 1264 printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name); 1265 goto out; 1266 } 1267 1268 sg_init_table(hwif->sg_table, hwif->sg_max_nents); 1269 1270 if (init_irq(hwif) == 0) 1271 goto done; 1272 1273 old_irq = hwif->irq; 1274 /* 1275 * It failed to initialise. Find the default IRQ for 1276 * this port and try that. 1277 */ 1278 hwif->irq = __ide_default_irq(hwif->io_ports.data_addr); 1279 if (!hwif->irq) { 1280 printk("%s: Disabled unable to get IRQ %d.\n", 1281 hwif->name, old_irq); 1282 goto out; 1283 } 1284 if (init_irq(hwif)) { 1285 printk("%s: probed IRQ %d and default IRQ %d failed.\n", 1286 hwif->name, old_irq, hwif->irq); 1287 goto out; 1288 } 1289 printk("%s: probed IRQ %d failed, using default.\n", 1290 hwif->name, hwif->irq); 1291 1292done: 1293 blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS, 1294 THIS_MODULE, ata_probe, ata_lock, hwif); 1295 return 1; 1296 1297out: 1298 unregister_blkdev(hwif->major, hwif->name); 1299 return 0; 1300} 1301 1302static void hwif_register_devices(ide_hwif_t *hwif) 1303{ 1304 unsigned int i; 1305 1306 for (i = 0; i < MAX_DRIVES; i++) { 1307 ide_drive_t *drive = &hwif->drives[i]; 1308 struct device *dev = &drive->gendev; 1309 int ret; 1310 1311 if (!drive->present) 1312 continue; 1313 1314 ide_add_generic_settings(drive); 1315 1316 snprintf(dev->bus_id, BUS_ID_SIZE, "%u.%u", hwif->index, i); 1317 dev->parent = &hwif->gendev; 1318 dev->bus = &ide_bus_type; 1319 dev->driver_data = drive; 1320 dev->release = drive_release_dev; 1321 1322 ret = device_register(dev); 1323 if (ret < 0) 1324 printk(KERN_WARNING "IDE: %s: device_register error: " 1325 "%d\n", __func__, ret); 1326 } 1327} 1328 1329static void ide_port_init_devices(ide_hwif_t *hwif) 1330{ 1331 const struct ide_port_ops *port_ops = hwif->port_ops; 1332 int i; 1333 1334 for (i = 0; i < MAX_DRIVES; i++) { 1335 ide_drive_t *drive = &hwif->drives[i]; 1336 1337 if (hwif->host_flags & IDE_HFLAG_IO_32BIT) 1338 drive->io_32bit = 1; 1339 if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS) 1340 drive->unmask = 1; 1341 if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS) 1342 drive->no_unmask = 1; 1343 1344 if (port_ops && port_ops->init_dev) 1345 port_ops->init_dev(drive); 1346 } 1347} 1348 1349static void ide_init_port(ide_hwif_t *hwif, unsigned int port, 1350 const struct ide_port_info *d) 1351{ 1352 hwif->channel = port; 1353 1354 if (d->chipset) 1355 hwif->chipset = d->chipset; 1356 1357 if (d->init_iops) 1358 d->init_iops(hwif); 1359 1360 if ((!hwif->irq && (d->host_flags & IDE_HFLAG_LEGACY_IRQS)) || 1361 (d->host_flags & IDE_HFLAG_FORCE_LEGACY_IRQS)) 1362 hwif->irq = port ? 15 : 14; 1363 1364 /* ->host_flags may be set by ->init_iops (or even earlier...) */ 1365 hwif->host_flags |= d->host_flags; 1366 hwif->pio_mask = d->pio_mask; 1367 1368 if (d->tp_ops) 1369 hwif->tp_ops = d->tp_ops; 1370 1371 /* ->set_pio_mode for DTC2278 is currently limited to port 0 */ 1372 if (hwif->chipset != ide_dtc2278 || hwif->channel == 0) 1373 hwif->port_ops = d->port_ops; 1374 1375 hwif->swdma_mask = d->swdma_mask; 1376 hwif->mwdma_mask = d->mwdma_mask; 1377 hwif->ultra_mask = d->udma_mask; 1378 1379 if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) { 1380 int rc; 1381 1382 if (d->init_dma) 1383 rc = d->init_dma(hwif, d); 1384 else 1385 rc = ide_hwif_setup_dma(hwif, d); 1386 1387 if (rc < 0) { 1388 printk(KERN_INFO "%s: DMA disabled\n", hwif->name); 1389 hwif->dma_base = 0; 1390 hwif->swdma_mask = 0; 1391 hwif->mwdma_mask = 0; 1392 hwif->ultra_mask = 0; 1393 } else if (d->dma_ops) 1394 hwif->dma_ops = d->dma_ops; 1395 } 1396 1397 if ((d->host_flags & IDE_HFLAG_SERIALIZE) || 1398 ((d->host_flags & IDE_HFLAG_SERIALIZE_DMA) && hwif->dma_base)) { 1399 if (hwif->mate) 1400 hwif->mate->serialized = hwif->serialized = 1; 1401 } 1402 1403 if (d->host_flags & IDE_HFLAG_RQSIZE_256) 1404 hwif->rqsize = 256; 1405 1406 /* call chipset specific routine for each enabled port */ 1407 if (d->init_hwif) 1408 d->init_hwif(hwif); 1409} 1410 1411static void ide_port_cable_detect(ide_hwif_t *hwif) 1412{ 1413 const struct ide_port_ops *port_ops = hwif->port_ops; 1414 1415 if (port_ops && port_ops->cable_detect && (hwif->ultra_mask & 0x78)) { 1416 if (hwif->cbl != ATA_CBL_PATA40_SHORT) 1417 hwif->cbl = port_ops->cable_detect(hwif); 1418 } 1419} 1420 1421static ssize_t store_delete_devices(struct device *portdev, 1422 struct device_attribute *attr, 1423 const char *buf, size_t n) 1424{ 1425 ide_hwif_t *hwif = dev_get_drvdata(portdev); 1426 1427 if (strncmp(buf, "1", n)) 1428 return -EINVAL; 1429 1430 ide_port_unregister_devices(hwif); 1431 1432 return n; 1433}; 1434 1435static DEVICE_ATTR(delete_devices, S_IWUSR, NULL, store_delete_devices); 1436 1437static ssize_t store_scan(struct device *portdev, 1438 struct device_attribute *attr, 1439 const char *buf, size_t n) 1440{ 1441 ide_hwif_t *hwif = dev_get_drvdata(portdev); 1442 1443 if (strncmp(buf, "1", n)) 1444 return -EINVAL; 1445 1446 ide_port_unregister_devices(hwif); 1447 ide_port_scan(hwif); 1448 1449 return n; 1450}; 1451 1452static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan); 1453 1454static struct device_attribute *ide_port_attrs[] = { 1455 &dev_attr_delete_devices, 1456 &dev_attr_scan, 1457 NULL 1458}; 1459 1460static int ide_sysfs_register_port(ide_hwif_t *hwif) 1461{ 1462 int i, rc; 1463 1464 for (i = 0; ide_port_attrs[i]; i++) { 1465 rc = device_create_file(hwif->portdev, ide_port_attrs[i]); 1466 if (rc) 1467 break; 1468 } 1469 1470 return rc; 1471} 1472 1473/** 1474 * ide_find_port_slot - find free ide_hwifs[] slot 1475 * @d: IDE port info 1476 * 1477 * Return the new hwif. If we are out of free slots return NULL. 1478 */ 1479 1480static ide_hwif_t *ide_find_port_slot(const struct ide_port_info *d) 1481{ 1482 ide_hwif_t *hwif; 1483 int i; 1484 u8 bootable = (d && (d->host_flags & IDE_HFLAG_NON_BOOTABLE)) ? 0 : 1; 1485 1486 /* 1487 * Claim an unassigned slot. 1488 * 1489 * Give preference to claiming other slots before claiming ide0/ide1, 1490 * just in case there's another interface yet-to-be-scanned 1491 * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults). 1492 * 1493 * Unless there is a bootable card that does not use the standard 1494 * ports 0x1f0/0x170 (the ide0/ide1 defaults). 1495 */ 1496 if (bootable) { 1497 i = (d && (d->host_flags & IDE_HFLAG_QD_2ND_PORT)) ? 1 : 0; 1498 1499 for (; i < MAX_HWIFS; i++) { 1500 hwif = &ide_hwifs[i]; 1501 if (hwif->chipset == ide_unknown) 1502 goto out_found; 1503 } 1504 } else { 1505 for (i = 2; i < MAX_HWIFS; i++) { 1506 hwif = &ide_hwifs[i]; 1507 if (hwif->chipset == ide_unknown) 1508 goto out_found; 1509 } 1510 for (i = 0; i < 2 && i < MAX_HWIFS; i++) { 1511 hwif = &ide_hwifs[i]; 1512 if (hwif->chipset == ide_unknown) 1513 goto out_found; 1514 } 1515 } 1516 1517 printk(KERN_ERR "%s: no free slot for interface\n", 1518 d ? d->name : "ide"); 1519 1520 return NULL; 1521 1522out_found: 1523 ide_init_port_data(hwif, i); 1524 return hwif; 1525} 1526 1527struct ide_host *ide_host_alloc_all(const struct ide_port_info *d, 1528 hw_regs_t **hws) 1529{ 1530 struct ide_host *host; 1531 int i; 1532 1533 host = kzalloc(sizeof(*host), GFP_KERNEL); 1534 if (host == NULL) 1535 return NULL; 1536 1537 for (i = 0; i < MAX_HWIFS; i++) { 1538 ide_hwif_t *hwif; 1539 1540 if (hws[i] == NULL) 1541 continue; 1542 1543 hwif = ide_find_port_slot(d); 1544 if (hwif) { 1545 hwif->chipset = hws[i]->chipset; 1546 1547 host->ports[i] = hwif; 1548 host->n_ports++; 1549 } 1550 } 1551 1552 if (host->n_ports == 0) { 1553 kfree(host); 1554 return NULL; 1555 } 1556 1557 return host; 1558} 1559EXPORT_SYMBOL_GPL(ide_host_alloc_all); 1560 1561struct ide_host *ide_host_alloc(const struct ide_port_info *d, hw_regs_t **hws) 1562{ 1563 hw_regs_t *hws_all[MAX_HWIFS]; 1564 int i; 1565 1566 for (i = 0; i < MAX_HWIFS; i++) 1567 hws_all[i] = (i < 4) ? hws[i] : NULL; 1568 1569 return ide_host_alloc_all(d, hws_all); 1570} 1571EXPORT_SYMBOL_GPL(ide_host_alloc); 1572 1573int ide_host_register(struct ide_host *host, const struct ide_port_info *d, 1574 hw_regs_t **hws) 1575{ 1576 ide_hwif_t *hwif, *mate = NULL; 1577 u8 idx[MAX_HWIFS]; 1578 int i, rc = 0; 1579 1580 for (i = 0; i < MAX_HWIFS; i++) { 1581 idx[i] = host->ports[i] ? host->ports[i]->index : 0xff; 1582 1583 if (idx[i] == 0xff) { 1584 mate = NULL; 1585 continue; 1586 } 1587 1588 hwif = &ide_hwifs[idx[i]]; 1589 1590 ide_init_port_hw(hwif, hws[i]); 1591 ide_port_apply_params(hwif); 1592 1593 if (d == NULL) { 1594 mate = NULL; 1595 continue; 1596 } 1597 1598 if ((i & 1) && mate) { 1599 hwif->mate = mate; 1600 mate->mate = hwif; 1601 } 1602 1603 mate = (i & 1) ? NULL : hwif; 1604 1605 ide_init_port(hwif, i & 1, d); 1606 ide_port_cable_detect(hwif); 1607 ide_port_init_devices(hwif); 1608 } 1609 1610 for (i = 0; i < MAX_HWIFS; i++) { 1611 if (idx[i] == 0xff) 1612 continue; 1613 1614 hwif = &ide_hwifs[idx[i]]; 1615 1616 if (ide_probe_port(hwif) == 0) 1617 hwif->present = 1; 1618 1619 if (hwif->chipset != ide_4drives || !hwif->mate || 1620 !hwif->mate->present) 1621 ide_register_port(hwif); 1622 1623 if (hwif->present) 1624 ide_port_tune_devices(hwif); 1625 } 1626 1627 for (i = 0; i < MAX_HWIFS; i++) { 1628 if (idx[i] == 0xff) 1629 continue; 1630 1631 hwif = &ide_hwifs[idx[i]]; 1632 1633 if (hwif_init(hwif) == 0) { 1634 printk(KERN_INFO "%s: failed to initialize IDE " 1635 "interface\n", hwif->name); 1636 hwif->present = 0; 1637 rc = -1; 1638 continue; 1639 } 1640 1641 if (hwif->present) 1642 ide_port_setup_devices(hwif); 1643 1644 ide_acpi_init(hwif); 1645 1646 if (hwif->present) 1647 ide_acpi_port_init_devices(hwif); 1648 } 1649 1650 for (i = 0; i < MAX_HWIFS; i++) { 1651 if (idx[i] == 0xff) 1652 continue; 1653 1654 hwif = &ide_hwifs[idx[i]]; 1655 1656 if (hwif->chipset == ide_unknown) 1657 hwif->chipset = ide_generic; 1658 1659 if (hwif->present) 1660 hwif_register_devices(hwif); 1661 } 1662 1663 for (i = 0; i < MAX_HWIFS; i++) { 1664 if (idx[i] == 0xff) 1665 continue; 1666 1667 hwif = &ide_hwifs[idx[i]]; 1668 1669 ide_sysfs_register_port(hwif); 1670 ide_proc_register_port(hwif); 1671 1672 if (hwif->present) 1673 ide_proc_port_register_devices(hwif); 1674 } 1675 1676 return rc; 1677} 1678EXPORT_SYMBOL_GPL(ide_host_register); 1679 1680int ide_host_add(const struct ide_port_info *d, hw_regs_t **hws, 1681 struct ide_host **hostp) 1682{ 1683 struct ide_host *host; 1684 1685 host = ide_host_alloc(d, hws); 1686 if (host == NULL) 1687 return -ENOMEM; 1688 1689 ide_host_register(host, d, hws); 1690 1691 if (hostp) 1692 *hostp = host; 1693 1694 return 0; 1695} 1696EXPORT_SYMBOL_GPL(ide_host_add); 1697 1698void ide_host_remove(struct ide_host *host) 1699{ 1700 int i; 1701 1702 for (i = 0; i < MAX_HWIFS; i++) { 1703 if (host->ports[i]) 1704 ide_unregister(host->ports[i]); 1705 } 1706 1707 kfree(host); 1708} 1709EXPORT_SYMBOL_GPL(ide_host_remove); 1710 1711void ide_port_scan(ide_hwif_t *hwif) 1712{ 1713 ide_port_apply_params(hwif); 1714 ide_port_cable_detect(hwif); 1715 ide_port_init_devices(hwif); 1716 1717 if (ide_probe_port(hwif) < 0) 1718 return; 1719 1720 hwif->present = 1; 1721 1722 ide_port_tune_devices(hwif); 1723 ide_acpi_port_init_devices(hwif); 1724 ide_port_setup_devices(hwif); 1725 hwif_register_devices(hwif); 1726 ide_proc_port_register_devices(hwif); 1727} 1728EXPORT_SYMBOL_GPL(ide_port_scan); 1729 1730static void ide_legacy_init_one(hw_regs_t **hws, hw_regs_t *hw, 1731 u8 port_no, const struct ide_port_info *d, 1732 unsigned long config) 1733{ 1734 unsigned long base, ctl; 1735 int irq; 1736 1737 if (port_no == 0) { 1738 base = 0x1f0; 1739 ctl = 0x3f6; 1740 irq = 14; 1741 } else { 1742 base = 0x170; 1743 ctl = 0x376; 1744 irq = 15; 1745 } 1746 1747 if (!request_region(base, 8, d->name)) { 1748 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n", 1749 d->name, base, base + 7); 1750 return; 1751 } 1752 1753 if (!request_region(ctl, 1, d->name)) { 1754 printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n", 1755 d->name, ctl); 1756 release_region(base, 8); 1757 return; 1758 } 1759 1760 ide_std_init_ports(hw, base, ctl); 1761 hw->irq = irq; 1762 hw->chipset = d->chipset; 1763 hw->config = config; 1764 1765 hws[port_no] = hw; 1766} 1767 1768int ide_legacy_device_add(const struct ide_port_info *d, unsigned long config) 1769{ 1770 hw_regs_t hw[2], *hws[] = { NULL, NULL, NULL, NULL }; 1771 1772 memset(&hw, 0, sizeof(hw)); 1773 1774 if ((d->host_flags & IDE_HFLAG_QD_2ND_PORT) == 0) 1775 ide_legacy_init_one(hws, &hw[0], 0, d, config); 1776 ide_legacy_init_one(hws, &hw[1], 1, d, config); 1777 1778 if (hws[0] == NULL && hws[1] == NULL && 1779 (d->host_flags & IDE_HFLAG_SINGLE)) 1780 return -ENOENT; 1781 1782 return ide_host_add(d, hws, NULL); 1783} 1784EXPORT_SYMBOL_GPL(ide_legacy_device_add); 1785