ide-probe.c revision 1f2efb82af3cfbac995f590a8f8d3beb6fa5678b
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->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 int use_altstatus = 0, rc; 271 unsigned long timeout; 272 u8 s = 0, a = 0; 273 274 /* take a deep breath */ 275 msleep(50); 276 277 if (io_ports->ctl_addr) { 278 a = hwif->read_altstatus(hwif); 279 s = hwif->read_status(hwif); 280 if ((a ^ s) & ~INDEX_STAT) 281 /* ancient Seagate drives, broken interfaces */ 282 printk(KERN_INFO "%s: probing with STATUS(0x%02x) " 283 "instead of ALTSTATUS(0x%02x)\n", 284 drive->name, s, a); 285 else 286 /* use non-intrusive polling */ 287 use_altstatus = 1; 288 } 289 290 /* set features register for atapi 291 * identify command to be sure of reply 292 */ 293 if (cmd == WIN_PIDENTIFY) { 294 ide_task_t task; 295 296 memset(&task, 0, sizeof(task)); 297 /* disable DMA & overlap */ 298 task.tf_flags = IDE_TFLAG_OUT_FEATURE; 299 300 drive->hwif->tf_load(drive, &task); 301 } 302 303 /* ask drive for ID */ 304 hwif->exec_command(hwif, cmd); 305 306 timeout = ((cmd == WIN_IDENTIFY) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2; 307 timeout += jiffies; 308 do { 309 if (time_after(jiffies, timeout)) { 310 /* drive timed-out */ 311 return 1; 312 } 313 /* give drive a breather */ 314 msleep(50); 315 s = use_altstatus ? hwif->read_altstatus(hwif) 316 : hwif->read_status(hwif); 317 } while (s & BUSY_STAT); 318 319 /* wait for IRQ and DRQ_STAT */ 320 msleep(50); 321 s = hwif->read_status(hwif); 322 323 if (OK_STAT(s, DRQ_STAT, BAD_R_STAT)) { 324 unsigned long flags; 325 326 /* local CPU only; some systems need this */ 327 local_irq_save(flags); 328 /* drive returned ID */ 329 do_identify(drive, cmd); 330 /* drive responded with ID */ 331 rc = 0; 332 /* clear drive IRQ */ 333 (void)hwif->read_status(hwif); 334 local_irq_restore(flags); 335 } else { 336 /* drive refused ID */ 337 rc = 2; 338 } 339 return rc; 340} 341 342/** 343 * try_to_identify - try to identify a drive 344 * @drive: drive to probe 345 * @cmd: command to use 346 * 347 * Issue the identify command and then do IRQ probing to 348 * complete the identification when needed by finding the 349 * IRQ the drive is attached to 350 */ 351 352static int try_to_identify (ide_drive_t *drive, u8 cmd) 353{ 354 ide_hwif_t *hwif = HWIF(drive); 355 int retval; 356 int autoprobe = 0; 357 unsigned long cookie = 0; 358 359 /* 360 * Disable device irq unless we need to 361 * probe for it. Otherwise we'll get spurious 362 * interrupts during the identify-phase that 363 * the irq handler isn't expecting. 364 */ 365 if (hwif->io_ports.ctl_addr) { 366 if (!hwif->irq) { 367 autoprobe = 1; 368 cookie = probe_irq_on(); 369 } 370 hwif->set_irq(hwif, autoprobe); 371 } 372 373 retval = actual_try_to_identify(drive, cmd); 374 375 if (autoprobe) { 376 int irq; 377 378 hwif->set_irq(hwif, 0); 379 /* clear drive IRQ */ 380 (void)hwif->read_status(hwif); 381 udelay(5); 382 irq = probe_irq_off(cookie); 383 if (!hwif->irq) { 384 if (irq > 0) { 385 hwif->irq = irq; 386 } else { 387 /* Mmmm.. multiple IRQs.. 388 * don't know which was ours 389 */ 390 printk("%s: IRQ probe failed (0x%lx)\n", 391 drive->name, cookie); 392 } 393 } 394 } 395 return retval; 396} 397 398static int ide_busy_sleep(ide_hwif_t *hwif) 399{ 400 unsigned long timeout = jiffies + WAIT_WORSTCASE; 401 u8 stat; 402 403 do { 404 msleep(50); 405 stat = hwif->read_status(hwif); 406 if ((stat & BUSY_STAT) == 0) 407 return 0; 408 } while (time_before(jiffies, timeout)); 409 410 return 1; 411} 412 413static u8 ide_read_device(ide_drive_t *drive) 414{ 415 ide_task_t task; 416 417 memset(&task, 0, sizeof(task)); 418 task.tf_flags = IDE_TFLAG_IN_DEVICE; 419 420 drive->hwif->tf_read(drive, &task); 421 422 return task.tf.device; 423} 424 425/** 426 * do_probe - probe an IDE device 427 * @drive: drive to probe 428 * @cmd: command to use 429 * 430 * do_probe() has the difficult job of finding a drive if it exists, 431 * without getting hung up if it doesn't exist, without trampling on 432 * ethernet cards, and without leaving any IRQs dangling to haunt us later. 433 * 434 * If a drive is "known" to exist (from CMOS or kernel parameters), 435 * but does not respond right away, the probe will "hang in there" 436 * for the maximum wait time (about 30 seconds), otherwise it will 437 * exit much more quickly. 438 * 439 * Returns: 0 device was identified 440 * 1 device timed-out (no response to identify request) 441 * 2 device aborted the command (refused to identify itself) 442 * 3 bad status from device (possible for ATAPI drives) 443 * 4 probe was not attempted because failure was obvious 444 */ 445 446static int do_probe (ide_drive_t *drive, u8 cmd) 447{ 448 ide_hwif_t *hwif = HWIF(drive); 449 int rc; 450 u8 stat; 451 452 if (drive->present) { 453 /* avoid waiting for inappropriate probes */ 454 if ((drive->media != ide_disk) && (cmd == WIN_IDENTIFY)) 455 return 4; 456 } 457#ifdef DEBUG 458 printk("probing for %s: present=%d, media=%d, probetype=%s\n", 459 drive->name, drive->present, drive->media, 460 (cmd == WIN_IDENTIFY) ? "ATA" : "ATAPI"); 461#endif 462 463 /* needed for some systems 464 * (e.g. crw9624 as drive0 with disk as slave) 465 */ 466 msleep(50); 467 SELECT_DRIVE(drive); 468 msleep(50); 469 470 if (ide_read_device(drive) != drive->select.all && !drive->present) { 471 if (drive->select.b.unit != 0) { 472 /* exit with drive0 selected */ 473 SELECT_DRIVE(&hwif->drives[0]); 474 /* allow BUSY_STAT to assert & clear */ 475 msleep(50); 476 } 477 /* no i/f present: mmm.. this should be a 4 -ml */ 478 return 3; 479 } 480 481 stat = hwif->read_status(hwif); 482 483 if (OK_STAT(stat, READY_STAT, BUSY_STAT) || 484 drive->present || cmd == WIN_PIDENTIFY) { 485 /* send cmd and wait */ 486 if ((rc = try_to_identify(drive, cmd))) { 487 /* failed: try again */ 488 rc = try_to_identify(drive,cmd); 489 } 490 491 stat = hwif->read_status(hwif); 492 493 if (stat == (BUSY_STAT | READY_STAT)) 494 return 4; 495 496 if (rc == 1 && cmd == WIN_PIDENTIFY) { 497 printk(KERN_ERR "%s: no response (status = 0x%02x), " 498 "resetting drive\n", drive->name, stat); 499 msleep(50); 500 SELECT_DRIVE(drive); 501 msleep(50); 502 hwif->exec_command(hwif, WIN_SRST); 503 (void)ide_busy_sleep(hwif); 504 rc = try_to_identify(drive, cmd); 505 } 506 507 /* ensure drive IRQ is clear */ 508 stat = hwif->read_status(hwif); 509 510 if (rc == 1) 511 printk(KERN_ERR "%s: no response (status = 0x%02x)\n", 512 drive->name, stat); 513 } else { 514 /* not present or maybe ATAPI */ 515 rc = 3; 516 } 517 if (drive->select.b.unit != 0) { 518 /* exit with drive0 selected */ 519 SELECT_DRIVE(&hwif->drives[0]); 520 msleep(50); 521 /* ensure drive irq is clear */ 522 (void)hwif->read_status(hwif); 523 } 524 return rc; 525} 526 527/* 528 * 529 */ 530static void enable_nest (ide_drive_t *drive) 531{ 532 ide_hwif_t *hwif = HWIF(drive); 533 u8 stat; 534 535 printk("%s: enabling %s -- ", hwif->name, drive->id->model); 536 SELECT_DRIVE(drive); 537 msleep(50); 538 hwif->exec_command(hwif, EXABYTE_ENABLE_NEST); 539 540 if (ide_busy_sleep(hwif)) { 541 printk(KERN_CONT "failed (timeout)\n"); 542 return; 543 } 544 545 msleep(50); 546 547 stat = hwif->read_status(hwif); 548 549 if (!OK_STAT(stat, 0, BAD_STAT)) 550 printk(KERN_CONT "failed (status = 0x%02x)\n", stat); 551 else 552 printk(KERN_CONT "success\n"); 553 554 /* if !(success||timed-out) */ 555 if (do_probe(drive, WIN_IDENTIFY) >= 2) { 556 /* look for ATAPI device */ 557 (void) do_probe(drive, WIN_PIDENTIFY); 558 } 559} 560 561/** 562 * probe_for_drives - upper level drive probe 563 * @drive: drive to probe for 564 * 565 * probe_for_drive() tests for existence of a given drive using do_probe() 566 * and presents things to the user as needed. 567 * 568 * Returns: 0 no device was found 569 * 1 device was found (note: drive->present might 570 * still be 0) 571 */ 572 573static inline u8 probe_for_drive (ide_drive_t *drive) 574{ 575 /* 576 * In order to keep things simple we have an id 577 * block for all drives at all times. If the device 578 * is pre ATA or refuses ATA/ATAPI identify we 579 * will add faked data to this. 580 * 581 * Also note that 0 everywhere means "can't do X" 582 */ 583 584 drive->id = kzalloc(SECTOR_WORDS *4, GFP_KERNEL); 585 drive->id_read = 0; 586 if(drive->id == NULL) 587 { 588 printk(KERN_ERR "ide: out of memory for id data.\n"); 589 return 0; 590 } 591 strcpy(drive->id->model, "UNKNOWN"); 592 593 /* skip probing? */ 594 if (!drive->noprobe) 595 { 596 /* if !(success||timed-out) */ 597 if (do_probe(drive, WIN_IDENTIFY) >= 2) { 598 /* look for ATAPI device */ 599 (void) do_probe(drive, WIN_PIDENTIFY); 600 } 601 if (!drive->present) 602 /* drive not found */ 603 return 0; 604 if (strstr(drive->id->model, "E X A B Y T E N E S T")) 605 enable_nest(drive); 606 607 /* identification failed? */ 608 if (!drive->id_read) { 609 if (drive->media == ide_disk) { 610 printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n", 611 drive->name, drive->cyl, 612 drive->head, drive->sect); 613 } else if (drive->media == ide_cdrom) { 614 printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name); 615 } else { 616 /* nuke it */ 617 printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name); 618 drive->present = 0; 619 } 620 } 621 /* drive was found */ 622 } 623 if(!drive->present) 624 return 0; 625 /* The drive wasn't being helpful. Add generic info only */ 626 if (drive->id_read == 0) { 627 generic_id(drive); 628 return 1; 629 } 630 631 if (drive->media == ide_disk) { 632 ide_disk_init_chs(drive); 633 ide_disk_init_mult_count(drive); 634 } 635 636 return drive->present; 637} 638 639static void hwif_release_dev (struct device *dev) 640{ 641 ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev); 642 643 complete(&hwif->gendev_rel_comp); 644} 645 646static int ide_register_port(ide_hwif_t *hwif) 647{ 648 int ret; 649 650 /* register with global device tree */ 651 strlcpy(hwif->gendev.bus_id,hwif->name,BUS_ID_SIZE); 652 hwif->gendev.driver_data = hwif; 653 if (hwif->gendev.parent == NULL) { 654 if (hwif->dev) 655 hwif->gendev.parent = hwif->dev; 656 else 657 /* Would like to do = &device_legacy */ 658 hwif->gendev.parent = NULL; 659 } 660 hwif->gendev.release = hwif_release_dev; 661 ret = device_register(&hwif->gendev); 662 if (ret < 0) { 663 printk(KERN_WARNING "IDE: %s: device_register error: %d\n", 664 __func__, ret); 665 goto out; 666 } 667 668 hwif->portdev = device_create_drvdata(ide_port_class, &hwif->gendev, 669 MKDEV(0, 0), hwif, hwif->name); 670 if (IS_ERR(hwif->portdev)) { 671 ret = PTR_ERR(hwif->portdev); 672 device_unregister(&hwif->gendev); 673 } 674out: 675 return ret; 676} 677 678/** 679 * ide_port_wait_ready - wait for port to become ready 680 * @hwif: IDE port 681 * 682 * This is needed on some PPCs and a bunch of BIOS-less embedded 683 * platforms. Typical cases are: 684 * 685 * - The firmware hard reset the disk before booting the kernel, 686 * the drive is still doing it's poweron-reset sequence, that 687 * can take up to 30 seconds. 688 * 689 * - The firmware does nothing (or no firmware), the device is 690 * still in POST state (same as above actually). 691 * 692 * - Some CD/DVD/Writer combo drives tend to drive the bus during 693 * their reset sequence even when they are non-selected slave 694 * devices, thus preventing discovery of the main HD. 695 * 696 * Doing this wait-for-non-busy should not harm any existing 697 * configuration and fix some issues like the above. 698 * 699 * BenH. 700 * 701 * Returns 0 on success, error code (< 0) otherwise. 702 */ 703 704static int ide_port_wait_ready(ide_hwif_t *hwif) 705{ 706 int unit, rc; 707 708 printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name); 709 710 /* Let HW settle down a bit from whatever init state we 711 * come from */ 712 mdelay(2); 713 714 /* Wait for BSY bit to go away, spec timeout is 30 seconds, 715 * I know of at least one disk who takes 31 seconds, I use 35 716 * here to be safe 717 */ 718 rc = ide_wait_not_busy(hwif, 35000); 719 if (rc) 720 return rc; 721 722 /* Now make sure both master & slave are ready */ 723 for (unit = 0; unit < MAX_DRIVES; unit++) { 724 ide_drive_t *drive = &hwif->drives[unit]; 725 726 /* Ignore disks that we will not probe for later. */ 727 if (!drive->noprobe || drive->present) { 728 SELECT_DRIVE(drive); 729 hwif->set_irq(hwif, 1); 730 mdelay(2); 731 rc = ide_wait_not_busy(hwif, 35000); 732 if (rc) 733 goto out; 734 } else 735 printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n", 736 drive->name); 737 } 738out: 739 /* Exit function with master reselected (let's be sane) */ 740 if (unit) 741 SELECT_DRIVE(&hwif->drives[0]); 742 743 return rc; 744} 745 746/** 747 * ide_undecoded_slave - look for bad CF adapters 748 * @drive1: drive 749 * 750 * Analyse the drives on the interface and attempt to decide if we 751 * have the same drive viewed twice. This occurs with crap CF adapters 752 * and PCMCIA sometimes. 753 */ 754 755void ide_undecoded_slave(ide_drive_t *drive1) 756{ 757 ide_drive_t *drive0 = &drive1->hwif->drives[0]; 758 759 if ((drive1->dn & 1) == 0 || drive0->present == 0) 760 return; 761 762 /* If the models don't match they are not the same product */ 763 if (strcmp(drive0->id->model, drive1->id->model)) 764 return; 765 766 /* Serial numbers do not match */ 767 if (strncmp(drive0->id->serial_no, drive1->id->serial_no, 20)) 768 return; 769 770 /* No serial number, thankfully very rare for CF */ 771 if (drive0->id->serial_no[0] == 0) 772 return; 773 774 /* Appears to be an IDE flash adapter with decode bugs */ 775 printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n"); 776 777 drive1->present = 0; 778} 779 780EXPORT_SYMBOL_GPL(ide_undecoded_slave); 781 782static int ide_probe_port(ide_hwif_t *hwif) 783{ 784 unsigned long flags; 785 unsigned int irqd; 786 int unit, rc = -ENODEV; 787 788 BUG_ON(hwif->present); 789 790 if (hwif->drives[0].noprobe && hwif->drives[1].noprobe) 791 return -EACCES; 792 793 /* 794 * We must always disable IRQ, as probe_for_drive will assert IRQ, but 795 * we'll install our IRQ driver much later... 796 */ 797 irqd = hwif->irq; 798 if (irqd) 799 disable_irq(hwif->irq); 800 801 local_irq_set(flags); 802 803 if (ide_port_wait_ready(hwif) == -EBUSY) 804 printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name); 805 806 /* 807 * Second drive should only exist if first drive was found, 808 * but a lot of cdrom drives are configured as single slaves. 809 */ 810 for (unit = 0; unit < MAX_DRIVES; ++unit) { 811 ide_drive_t *drive = &hwif->drives[unit]; 812 drive->dn = (hwif->channel ? 2 : 0) + unit; 813 (void) probe_for_drive(drive); 814 if (drive->present) 815 rc = 0; 816 } 817 818 local_irq_restore(flags); 819 820 /* 821 * Use cached IRQ number. It might be (and is...) changed by probe 822 * code above 823 */ 824 if (irqd) 825 enable_irq(irqd); 826 827 return rc; 828} 829 830static void ide_port_tune_devices(ide_hwif_t *hwif) 831{ 832 const struct ide_port_ops *port_ops = hwif->port_ops; 833 int unit; 834 835 for (unit = 0; unit < MAX_DRIVES; unit++) { 836 ide_drive_t *drive = &hwif->drives[unit]; 837 838 if (drive->present && port_ops && port_ops->quirkproc) 839 port_ops->quirkproc(drive); 840 } 841 842 for (unit = 0; unit < MAX_DRIVES; ++unit) { 843 ide_drive_t *drive = &hwif->drives[unit]; 844 845 if (drive->present) { 846 ide_set_max_pio(drive); 847 848 drive->nice1 = 1; 849 850 if (hwif->dma_ops) 851 ide_set_dma(drive); 852 } 853 } 854 855 for (unit = 0; unit < MAX_DRIVES; ++unit) { 856 ide_drive_t *drive = &hwif->drives[unit]; 857 858 if (hwif->host_flags & IDE_HFLAG_NO_IO_32BIT) 859 drive->no_io_32bit = 1; 860 else 861 drive->no_io_32bit = drive->id->dword_io ? 1 : 0; 862 } 863} 864 865#if MAX_HWIFS > 1 866/* 867 * save_match() is used to simplify logic in init_irq() below. 868 * 869 * A loophole here is that we may not know about a particular 870 * hwif's irq until after that hwif is actually probed/initialized.. 871 * This could be a problem for the case where an hwif is on a 872 * dual interface that requires serialization (eg. cmd640) and another 873 * hwif using one of the same irqs is initialized beforehand. 874 * 875 * This routine detects and reports such situations, but does not fix them. 876 */ 877static void save_match(ide_hwif_t *hwif, ide_hwif_t *new, ide_hwif_t **match) 878{ 879 ide_hwif_t *m = *match; 880 881 if (m && m->hwgroup && m->hwgroup != new->hwgroup) { 882 if (!new->hwgroup) 883 return; 884 printk("%s: potential irq problem with %s and %s\n", 885 hwif->name, new->name, m->name); 886 } 887 if (!m || m->irq != hwif->irq) /* don't undo a prior perfect match */ 888 *match = new; 889} 890#endif /* MAX_HWIFS > 1 */ 891 892/* 893 * init request queue 894 */ 895static int ide_init_queue(ide_drive_t *drive) 896{ 897 struct request_queue *q; 898 ide_hwif_t *hwif = HWIF(drive); 899 int max_sectors = 256; 900 int max_sg_entries = PRD_ENTRIES; 901 902 /* 903 * Our default set up assumes the normal IDE case, 904 * that is 64K segmenting, standard PRD setup 905 * and LBA28. Some drivers then impose their own 906 * limits and LBA48 we could raise it but as yet 907 * do not. 908 */ 909 910 q = blk_init_queue_node(do_ide_request, &ide_lock, hwif_to_node(hwif)); 911 if (!q) 912 return 1; 913 914 q->queuedata = drive; 915 blk_queue_segment_boundary(q, 0xffff); 916 917 if (hwif->rqsize < max_sectors) 918 max_sectors = hwif->rqsize; 919 blk_queue_max_sectors(q, max_sectors); 920 921#ifdef CONFIG_PCI 922 /* When we have an IOMMU, we may have a problem where pci_map_sg() 923 * creates segments that don't completely match our boundary 924 * requirements and thus need to be broken up again. Because it 925 * doesn't align properly either, we may actually have to break up 926 * to more segments than what was we got in the first place, a max 927 * worst case is twice as many. 928 * This will be fixed once we teach pci_map_sg() about our boundary 929 * requirements, hopefully soon. *FIXME* 930 */ 931 if (!PCI_DMA_BUS_IS_PHYS) 932 max_sg_entries >>= 1; 933#endif /* CONFIG_PCI */ 934 935 blk_queue_max_hw_segments(q, max_sg_entries); 936 blk_queue_max_phys_segments(q, max_sg_entries); 937 938 /* assign drive queue */ 939 drive->queue = q; 940 941 /* needs drive->queue to be set */ 942 ide_toggle_bounce(drive, 1); 943 944 return 0; 945} 946 947static void ide_add_drive_to_hwgroup(ide_drive_t *drive) 948{ 949 ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; 950 951 spin_lock_irq(&ide_lock); 952 if (!hwgroup->drive) { 953 /* first drive for hwgroup. */ 954 drive->next = drive; 955 hwgroup->drive = drive; 956 hwgroup->hwif = HWIF(hwgroup->drive); 957 } else { 958 drive->next = hwgroup->drive->next; 959 hwgroup->drive->next = drive; 960 } 961 spin_unlock_irq(&ide_lock); 962} 963 964/* 965 * For any present drive: 966 * - allocate the block device queue 967 * - link drive into the hwgroup 968 */ 969static void ide_port_setup_devices(ide_hwif_t *hwif) 970{ 971 int i; 972 973 mutex_lock(&ide_cfg_mtx); 974 for (i = 0; i < MAX_DRIVES; i++) { 975 ide_drive_t *drive = &hwif->drives[i]; 976 977 if (!drive->present) 978 continue; 979 980 if (ide_init_queue(drive)) { 981 printk(KERN_ERR "ide: failed to init %s\n", 982 drive->name); 983 continue; 984 } 985 986 ide_add_drive_to_hwgroup(drive); 987 } 988 mutex_unlock(&ide_cfg_mtx); 989} 990 991/* 992 * This routine sets up the irq for an ide interface, and creates a new 993 * hwgroup for the irq/hwif if none was previously assigned. 994 * 995 * Much of the code is for correctly detecting/handling irq sharing 996 * and irq serialization situations. This is somewhat complex because 997 * it handles static as well as dynamic (PCMCIA) IDE interfaces. 998 */ 999static int init_irq (ide_hwif_t *hwif) 1000{ 1001 struct ide_io_ports *io_ports = &hwif->io_ports; 1002 unsigned int index; 1003 ide_hwgroup_t *hwgroup; 1004 ide_hwif_t *match = NULL; 1005 1006 1007 BUG_ON(in_interrupt()); 1008 BUG_ON(irqs_disabled()); 1009 BUG_ON(hwif == NULL); 1010 1011 mutex_lock(&ide_cfg_mtx); 1012 hwif->hwgroup = NULL; 1013#if MAX_HWIFS > 1 1014 /* 1015 * Group up with any other hwifs that share our irq(s). 1016 */ 1017 for (index = 0; index < MAX_HWIFS; index++) { 1018 ide_hwif_t *h = &ide_hwifs[index]; 1019 if (h->hwgroup) { /* scan only initialized hwif's */ 1020 if (hwif->irq == h->irq) { 1021 hwif->sharing_irq = h->sharing_irq = 1; 1022 if (hwif->chipset != ide_pci || 1023 h->chipset != ide_pci) { 1024 save_match(hwif, h, &match); 1025 } 1026 } 1027 if (hwif->serialized) { 1028 if (hwif->mate && hwif->mate->irq == h->irq) 1029 save_match(hwif, h, &match); 1030 } 1031 if (h->serialized) { 1032 if (h->mate && hwif->irq == h->mate->irq) 1033 save_match(hwif, h, &match); 1034 } 1035 } 1036 } 1037#endif /* MAX_HWIFS > 1 */ 1038 /* 1039 * If we are still without a hwgroup, then form a new one 1040 */ 1041 if (match) { 1042 hwgroup = match->hwgroup; 1043 hwif->hwgroup = hwgroup; 1044 /* 1045 * Link us into the hwgroup. 1046 * This must be done early, do ensure that unexpected_intr 1047 * can find the hwif and prevent irq storms. 1048 * No drives are attached to the new hwif, choose_drive 1049 * can't do anything stupid (yet). 1050 * Add ourself as the 2nd entry to the hwgroup->hwif 1051 * linked list, the first entry is the hwif that owns 1052 * hwgroup->handler - do not change that. 1053 */ 1054 spin_lock_irq(&ide_lock); 1055 hwif->next = hwgroup->hwif->next; 1056 hwgroup->hwif->next = hwif; 1057 BUG_ON(hwif->next == hwif); 1058 spin_unlock_irq(&ide_lock); 1059 } else { 1060 hwgroup = kmalloc_node(sizeof(*hwgroup), GFP_KERNEL|__GFP_ZERO, 1061 hwif_to_node(hwif)); 1062 if (hwgroup == NULL) 1063 goto out_up; 1064 1065 hwif->hwgroup = hwgroup; 1066 hwgroup->hwif = hwif->next = hwif; 1067 1068 init_timer(&hwgroup->timer); 1069 hwgroup->timer.function = &ide_timer_expiry; 1070 hwgroup->timer.data = (unsigned long) hwgroup; 1071 } 1072 1073 /* 1074 * Allocate the irq, if not already obtained for another hwif 1075 */ 1076 if (!match || match->irq != hwif->irq) { 1077 int sa = 0; 1078#if defined(__mc68000__) 1079 sa = IRQF_SHARED; 1080#endif /* __mc68000__ */ 1081 1082 if (IDE_CHIPSET_IS_PCI(hwif->chipset)) 1083 sa = IRQF_SHARED; 1084 1085 if (io_ports->ctl_addr) 1086 hwif->set_irq(hwif, 1); 1087 1088 if (request_irq(hwif->irq,&ide_intr,sa,hwif->name,hwgroup)) 1089 goto out_unlink; 1090 } 1091 1092 if (!hwif->rqsize) { 1093 if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) || 1094 (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA)) 1095 hwif->rqsize = 256; 1096 else 1097 hwif->rqsize = 65536; 1098 } 1099 1100#if !defined(__mc68000__) 1101 printk("%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name, 1102 io_ports->data_addr, io_ports->status_addr, 1103 io_ports->ctl_addr, hwif->irq); 1104#else 1105 printk("%s at 0x%08lx on irq %d", hwif->name, 1106 io_ports->data_addr, hwif->irq); 1107#endif /* __mc68000__ */ 1108 if (match) 1109 printk(" (%sed with %s)", 1110 hwif->sharing_irq ? "shar" : "serializ", match->name); 1111 printk("\n"); 1112 1113 mutex_unlock(&ide_cfg_mtx); 1114 return 0; 1115out_unlink: 1116 ide_remove_port_from_hwgroup(hwif); 1117out_up: 1118 mutex_unlock(&ide_cfg_mtx); 1119 return 1; 1120} 1121 1122static int ata_lock(dev_t dev, void *data) 1123{ 1124 /* FIXME: we want to pin hwif down */ 1125 return 0; 1126} 1127 1128static struct kobject *ata_probe(dev_t dev, int *part, void *data) 1129{ 1130 ide_hwif_t *hwif = data; 1131 int unit = *part >> PARTN_BITS; 1132 ide_drive_t *drive = &hwif->drives[unit]; 1133 if (!drive->present) 1134 return NULL; 1135 1136 if (drive->media == ide_disk) 1137 request_module("ide-disk"); 1138 if (drive->scsi) 1139 request_module("ide-scsi"); 1140 if (drive->media == ide_cdrom || drive->media == ide_optical) 1141 request_module("ide-cd"); 1142 if (drive->media == ide_tape) 1143 request_module("ide-tape"); 1144 if (drive->media == ide_floppy) 1145 request_module("ide-floppy"); 1146 1147 return NULL; 1148} 1149 1150static struct kobject *exact_match(dev_t dev, int *part, void *data) 1151{ 1152 struct gendisk *p = data; 1153 *part &= (1 << PARTN_BITS) - 1; 1154 return &p->dev.kobj; 1155} 1156 1157static int exact_lock(dev_t dev, void *data) 1158{ 1159 struct gendisk *p = data; 1160 1161 if (!get_disk(p)) 1162 return -1; 1163 return 0; 1164} 1165 1166void ide_register_region(struct gendisk *disk) 1167{ 1168 blk_register_region(MKDEV(disk->major, disk->first_minor), 1169 disk->minors, NULL, exact_match, exact_lock, disk); 1170} 1171 1172EXPORT_SYMBOL_GPL(ide_register_region); 1173 1174void ide_unregister_region(struct gendisk *disk) 1175{ 1176 blk_unregister_region(MKDEV(disk->major, disk->first_minor), 1177 disk->minors); 1178} 1179 1180EXPORT_SYMBOL_GPL(ide_unregister_region); 1181 1182void ide_init_disk(struct gendisk *disk, ide_drive_t *drive) 1183{ 1184 ide_hwif_t *hwif = drive->hwif; 1185 unsigned int unit = (drive->select.all >> 4) & 1; 1186 1187 disk->major = hwif->major; 1188 disk->first_minor = unit << PARTN_BITS; 1189 sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit); 1190 disk->queue = drive->queue; 1191} 1192 1193EXPORT_SYMBOL_GPL(ide_init_disk); 1194 1195static void ide_remove_drive_from_hwgroup(ide_drive_t *drive) 1196{ 1197 ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; 1198 1199 if (drive == drive->next) { 1200 /* special case: last drive from hwgroup. */ 1201 BUG_ON(hwgroup->drive != drive); 1202 hwgroup->drive = NULL; 1203 } else { 1204 ide_drive_t *walk; 1205 1206 walk = hwgroup->drive; 1207 while (walk->next != drive) 1208 walk = walk->next; 1209 walk->next = drive->next; 1210 if (hwgroup->drive == drive) { 1211 hwgroup->drive = drive->next; 1212 hwgroup->hwif = hwgroup->drive->hwif; 1213 } 1214 } 1215 BUG_ON(hwgroup->drive == drive); 1216} 1217 1218static void drive_release_dev (struct device *dev) 1219{ 1220 ide_drive_t *drive = container_of(dev, ide_drive_t, gendev); 1221 1222 ide_proc_unregister_device(drive); 1223 1224 spin_lock_irq(&ide_lock); 1225 ide_remove_drive_from_hwgroup(drive); 1226 kfree(drive->id); 1227 drive->id = NULL; 1228 drive->present = 0; 1229 /* Messed up locking ... */ 1230 spin_unlock_irq(&ide_lock); 1231 blk_cleanup_queue(drive->queue); 1232 spin_lock_irq(&ide_lock); 1233 drive->queue = NULL; 1234 spin_unlock_irq(&ide_lock); 1235 1236 complete(&drive->gendev_rel_comp); 1237} 1238 1239static int hwif_init(ide_hwif_t *hwif) 1240{ 1241 int old_irq; 1242 1243 if (!hwif->irq) { 1244 hwif->irq = __ide_default_irq(hwif->io_ports.data_addr); 1245 if (!hwif->irq) { 1246 printk("%s: DISABLED, NO IRQ\n", hwif->name); 1247 return 0; 1248 } 1249 } 1250 1251 if (register_blkdev(hwif->major, hwif->name)) 1252 return 0; 1253 1254 if (!hwif->sg_max_nents) 1255 hwif->sg_max_nents = PRD_ENTRIES; 1256 1257 hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents, 1258 GFP_KERNEL); 1259 if (!hwif->sg_table) { 1260 printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name); 1261 goto out; 1262 } 1263 1264 sg_init_table(hwif->sg_table, hwif->sg_max_nents); 1265 1266 if (init_irq(hwif) == 0) 1267 goto done; 1268 1269 old_irq = hwif->irq; 1270 /* 1271 * It failed to initialise. Find the default IRQ for 1272 * this port and try that. 1273 */ 1274 hwif->irq = __ide_default_irq(hwif->io_ports.data_addr); 1275 if (!hwif->irq) { 1276 printk("%s: Disabled unable to get IRQ %d.\n", 1277 hwif->name, old_irq); 1278 goto out; 1279 } 1280 if (init_irq(hwif)) { 1281 printk("%s: probed IRQ %d and default IRQ %d failed.\n", 1282 hwif->name, old_irq, hwif->irq); 1283 goto out; 1284 } 1285 printk("%s: probed IRQ %d failed, using default.\n", 1286 hwif->name, hwif->irq); 1287 1288done: 1289 blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS, 1290 THIS_MODULE, ata_probe, ata_lock, hwif); 1291 return 1; 1292 1293out: 1294 unregister_blkdev(hwif->major, hwif->name); 1295 return 0; 1296} 1297 1298static void hwif_register_devices(ide_hwif_t *hwif) 1299{ 1300 unsigned int i; 1301 1302 for (i = 0; i < MAX_DRIVES; i++) { 1303 ide_drive_t *drive = &hwif->drives[i]; 1304 struct device *dev = &drive->gendev; 1305 int ret; 1306 1307 if (!drive->present) 1308 continue; 1309 1310 ide_add_generic_settings(drive); 1311 1312 snprintf(dev->bus_id, BUS_ID_SIZE, "%u.%u", hwif->index, i); 1313 dev->parent = &hwif->gendev; 1314 dev->bus = &ide_bus_type; 1315 dev->driver_data = drive; 1316 dev->release = drive_release_dev; 1317 1318 ret = device_register(dev); 1319 if (ret < 0) 1320 printk(KERN_WARNING "IDE: %s: device_register error: " 1321 "%d\n", __func__, ret); 1322 } 1323} 1324 1325static void ide_port_init_devices(ide_hwif_t *hwif) 1326{ 1327 const struct ide_port_ops *port_ops = hwif->port_ops; 1328 int i; 1329 1330 for (i = 0; i < MAX_DRIVES; i++) { 1331 ide_drive_t *drive = &hwif->drives[i]; 1332 1333 if (hwif->host_flags & IDE_HFLAG_IO_32BIT) 1334 drive->io_32bit = 1; 1335 if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS) 1336 drive->unmask = 1; 1337 if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS) 1338 drive->no_unmask = 1; 1339 1340 if (port_ops && port_ops->init_dev) 1341 port_ops->init_dev(drive); 1342 } 1343} 1344 1345static void ide_init_port(ide_hwif_t *hwif, unsigned int port, 1346 const struct ide_port_info *d) 1347{ 1348 hwif->channel = port; 1349 1350 if (d->chipset) 1351 hwif->chipset = d->chipset; 1352 1353 if (d->init_iops) 1354 d->init_iops(hwif); 1355 1356 if ((!hwif->irq && (d->host_flags & IDE_HFLAG_LEGACY_IRQS)) || 1357 (d->host_flags & IDE_HFLAG_FORCE_LEGACY_IRQS)) 1358 hwif->irq = port ? 15 : 14; 1359 1360 /* ->host_flags may be set by ->init_iops (or even earlier...) */ 1361 hwif->host_flags |= d->host_flags; 1362 hwif->pio_mask = d->pio_mask; 1363 1364 /* ->set_pio_mode for DTC2278 is currently limited to port 0 */ 1365 if (hwif->chipset != ide_dtc2278 || hwif->channel == 0) 1366 hwif->port_ops = d->port_ops; 1367 1368 hwif->swdma_mask = d->swdma_mask; 1369 hwif->mwdma_mask = d->mwdma_mask; 1370 hwif->ultra_mask = d->udma_mask; 1371 1372 if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) { 1373 int rc; 1374 1375 if (d->init_dma) 1376 rc = d->init_dma(hwif, d); 1377 else 1378 rc = ide_hwif_setup_dma(hwif, d); 1379 1380 if (rc < 0) { 1381 printk(KERN_INFO "%s: DMA disabled\n", hwif->name); 1382 hwif->dma_base = 0; 1383 hwif->swdma_mask = 0; 1384 hwif->mwdma_mask = 0; 1385 hwif->ultra_mask = 0; 1386 } else if (d->dma_ops) 1387 hwif->dma_ops = d->dma_ops; 1388 } 1389 1390 if ((d->host_flags & IDE_HFLAG_SERIALIZE) || 1391 ((d->host_flags & IDE_HFLAG_SERIALIZE_DMA) && hwif->dma_base)) { 1392 if (hwif->mate) 1393 hwif->mate->serialized = hwif->serialized = 1; 1394 } 1395 1396 if (d->host_flags & IDE_HFLAG_RQSIZE_256) 1397 hwif->rqsize = 256; 1398 1399 /* call chipset specific routine for each enabled port */ 1400 if (d->init_hwif) 1401 d->init_hwif(hwif); 1402} 1403 1404static void ide_port_cable_detect(ide_hwif_t *hwif) 1405{ 1406 const struct ide_port_ops *port_ops = hwif->port_ops; 1407 1408 if (port_ops && port_ops->cable_detect && (hwif->ultra_mask & 0x78)) { 1409 if (hwif->cbl != ATA_CBL_PATA40_SHORT) 1410 hwif->cbl = port_ops->cable_detect(hwif); 1411 } 1412} 1413 1414static ssize_t store_delete_devices(struct device *portdev, 1415 struct device_attribute *attr, 1416 const char *buf, size_t n) 1417{ 1418 ide_hwif_t *hwif = dev_get_drvdata(portdev); 1419 1420 if (strncmp(buf, "1", n)) 1421 return -EINVAL; 1422 1423 ide_port_unregister_devices(hwif); 1424 1425 return n; 1426}; 1427 1428static DEVICE_ATTR(delete_devices, S_IWUSR, NULL, store_delete_devices); 1429 1430static ssize_t store_scan(struct device *portdev, 1431 struct device_attribute *attr, 1432 const char *buf, size_t n) 1433{ 1434 ide_hwif_t *hwif = dev_get_drvdata(portdev); 1435 1436 if (strncmp(buf, "1", n)) 1437 return -EINVAL; 1438 1439 ide_port_unregister_devices(hwif); 1440 ide_port_scan(hwif); 1441 1442 return n; 1443}; 1444 1445static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan); 1446 1447static struct device_attribute *ide_port_attrs[] = { 1448 &dev_attr_delete_devices, 1449 &dev_attr_scan, 1450 NULL 1451}; 1452 1453static int ide_sysfs_register_port(ide_hwif_t *hwif) 1454{ 1455 int i, rc; 1456 1457 for (i = 0; ide_port_attrs[i]; i++) { 1458 rc = device_create_file(hwif->portdev, ide_port_attrs[i]); 1459 if (rc) 1460 break; 1461 } 1462 1463 return rc; 1464} 1465 1466/** 1467 * ide_find_port_slot - find free ide_hwifs[] slot 1468 * @d: IDE port info 1469 * 1470 * Return the new hwif. If we are out of free slots return NULL. 1471 */ 1472 1473ide_hwif_t *ide_find_port_slot(const struct ide_port_info *d) 1474{ 1475 ide_hwif_t *hwif; 1476 int i; 1477 u8 bootable = (d && (d->host_flags & IDE_HFLAG_NON_BOOTABLE)) ? 0 : 1; 1478 1479 /* 1480 * Claim an unassigned slot. 1481 * 1482 * Give preference to claiming other slots before claiming ide0/ide1, 1483 * just in case there's another interface yet-to-be-scanned 1484 * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults). 1485 * 1486 * Unless there is a bootable card that does not use the standard 1487 * ports 0x1f0/0x170 (the ide0/ide1 defaults). 1488 */ 1489 if (bootable) { 1490 i = (d && (d->host_flags & IDE_HFLAG_QD_2ND_PORT)) ? 1 : 0; 1491 1492 for (; i < MAX_HWIFS; i++) { 1493 hwif = &ide_hwifs[i]; 1494 if (hwif->chipset == ide_unknown) 1495 goto out_found; 1496 } 1497 } else { 1498 for (i = 2; i < MAX_HWIFS; i++) { 1499 hwif = &ide_hwifs[i]; 1500 if (hwif->chipset == ide_unknown) 1501 goto out_found; 1502 } 1503 for (i = 0; i < 2 && i < MAX_HWIFS; i++) { 1504 hwif = &ide_hwifs[i]; 1505 if (hwif->chipset == ide_unknown) 1506 goto out_found; 1507 } 1508 } 1509 1510 printk(KERN_ERR "%s: no free slot for interface\n", 1511 d ? d->name : "ide"); 1512 1513 return NULL; 1514 1515out_found: 1516 ide_init_port_data(hwif, i); 1517 return hwif; 1518} 1519EXPORT_SYMBOL_GPL(ide_find_port_slot); 1520 1521int ide_device_add_all(u8 *idx, const struct ide_port_info *d, hw_regs_t **hws) 1522{ 1523 ide_hwif_t *hwif, *mate = NULL; 1524 int i, rc = 0; 1525 1526 for (i = 0; i < MAX_HWIFS; i++) { 1527 if (idx[i] == 0xff) { 1528 mate = NULL; 1529 continue; 1530 } 1531 1532 hwif = &ide_hwifs[idx[i]]; 1533 1534 ide_init_port_hw(hwif, hws[i]); 1535 ide_port_apply_params(hwif); 1536 1537 if (d == NULL) { 1538 mate = NULL; 1539 continue; 1540 } 1541 1542 if ((i & 1) && mate) { 1543 hwif->mate = mate; 1544 mate->mate = hwif; 1545 } 1546 1547 mate = (i & 1) ? NULL : hwif; 1548 1549 ide_init_port(hwif, i & 1, d); 1550 ide_port_cable_detect(hwif); 1551 ide_port_init_devices(hwif); 1552 } 1553 1554 for (i = 0; i < MAX_HWIFS; i++) { 1555 if (idx[i] == 0xff) 1556 continue; 1557 1558 hwif = &ide_hwifs[idx[i]]; 1559 1560 if (ide_probe_port(hwif) == 0) 1561 hwif->present = 1; 1562 1563 if (hwif->chipset != ide_4drives || !hwif->mate || 1564 !hwif->mate->present) 1565 ide_register_port(hwif); 1566 1567 if (hwif->present) 1568 ide_port_tune_devices(hwif); 1569 } 1570 1571 for (i = 0; i < MAX_HWIFS; i++) { 1572 if (idx[i] == 0xff) 1573 continue; 1574 1575 hwif = &ide_hwifs[idx[i]]; 1576 1577 if (hwif_init(hwif) == 0) { 1578 printk(KERN_INFO "%s: failed to initialize IDE " 1579 "interface\n", hwif->name); 1580 hwif->present = 0; 1581 rc = -1; 1582 continue; 1583 } 1584 1585 if (hwif->present) 1586 ide_port_setup_devices(hwif); 1587 1588 ide_acpi_init(hwif); 1589 1590 if (hwif->present) 1591 ide_acpi_port_init_devices(hwif); 1592 } 1593 1594 for (i = 0; i < MAX_HWIFS; i++) { 1595 if (idx[i] == 0xff) 1596 continue; 1597 1598 hwif = &ide_hwifs[idx[i]]; 1599 1600 if (hwif->chipset == ide_unknown) 1601 hwif->chipset = ide_generic; 1602 1603 if (hwif->present) 1604 hwif_register_devices(hwif); 1605 } 1606 1607 for (i = 0; i < MAX_HWIFS; i++) { 1608 if (idx[i] == 0xff) 1609 continue; 1610 1611 hwif = &ide_hwifs[idx[i]]; 1612 1613 ide_sysfs_register_port(hwif); 1614 ide_proc_register_port(hwif); 1615 1616 if (hwif->present) 1617 ide_proc_port_register_devices(hwif); 1618 } 1619 1620 return rc; 1621} 1622EXPORT_SYMBOL_GPL(ide_device_add_all); 1623 1624int ide_device_add(u8 *idx, const struct ide_port_info *d, hw_regs_t **hws) 1625{ 1626 hw_regs_t *hws_all[MAX_HWIFS]; 1627 u8 idx_all[MAX_HWIFS]; 1628 int i; 1629 1630 for (i = 0; i < MAX_HWIFS; i++) { 1631 hws_all[i] = (i < 4) ? hws[i] : NULL; 1632 idx_all[i] = (i < 4) ? idx[i] : 0xff; 1633 } 1634 1635 return ide_device_add_all(idx_all, d, hws_all); 1636} 1637EXPORT_SYMBOL_GPL(ide_device_add); 1638 1639void ide_port_scan(ide_hwif_t *hwif) 1640{ 1641 ide_port_apply_params(hwif); 1642 ide_port_cable_detect(hwif); 1643 ide_port_init_devices(hwif); 1644 1645 if (ide_probe_port(hwif) < 0) 1646 return; 1647 1648 hwif->present = 1; 1649 1650 ide_port_tune_devices(hwif); 1651 ide_acpi_port_init_devices(hwif); 1652 ide_port_setup_devices(hwif); 1653 hwif_register_devices(hwif); 1654 ide_proc_port_register_devices(hwif); 1655} 1656EXPORT_SYMBOL_GPL(ide_port_scan); 1657 1658static void ide_legacy_init_one(u8 *idx, hw_regs_t **hws, hw_regs_t *hw, 1659 u8 port_no, const struct ide_port_info *d, 1660 unsigned long config) 1661{ 1662 ide_hwif_t *hwif; 1663 unsigned long base, ctl; 1664 int irq; 1665 1666 if (port_no == 0) { 1667 base = 0x1f0; 1668 ctl = 0x3f6; 1669 irq = 14; 1670 } else { 1671 base = 0x170; 1672 ctl = 0x376; 1673 irq = 15; 1674 } 1675 1676 if (!request_region(base, 8, d->name)) { 1677 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n", 1678 d->name, base, base + 7); 1679 return; 1680 } 1681 1682 if (!request_region(ctl, 1, d->name)) { 1683 printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n", 1684 d->name, ctl); 1685 release_region(base, 8); 1686 return; 1687 } 1688 1689 ide_std_init_ports(hw, base, ctl); 1690 hw->irq = irq; 1691 hw->chipset = d->chipset; 1692 1693 hwif = ide_find_port_slot(d); 1694 if (hwif) { 1695 hwif->chipset = hw->chipset; 1696 1697 if (config) 1698 hwif->config_data = config; 1699 1700 hws[port_no] = hw; 1701 idx[port_no] = hwif->index; 1702 } 1703} 1704 1705int ide_legacy_device_add(const struct ide_port_info *d, unsigned long config) 1706{ 1707 u8 idx[4] = { 0xff, 0xff, 0xff, 0xff }; 1708 hw_regs_t hw[2], *hws[] = { NULL, NULL, NULL, NULL }; 1709 1710 memset(&hw, 0, sizeof(hw)); 1711 1712 if ((d->host_flags & IDE_HFLAG_QD_2ND_PORT) == 0) 1713 ide_legacy_init_one(idx, hws, &hw[0], 0, d, config); 1714 ide_legacy_init_one(idx, hws, &hw[1], 1, d, config); 1715 1716 if (idx[0] == 0xff && idx[1] == 0xff && 1717 (d->host_flags & IDE_HFLAG_SINGLE)) 1718 return -ENOENT; 1719 1720 ide_device_add(idx, d, hws); 1721 1722 return 0; 1723} 1724EXPORT_SYMBOL_GPL(ide_legacy_device_add); 1725