ide-probe.c revision b76916462d990751882eaeadc75ac8c487d6de1d
1/* 2 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below) 3 * Copyright (C) 2005, 2007 Bartlomiej Zolnierkiewicz 4 */ 5 6/* 7 * Mostly written by Mark Lord <mlord@pobox.com> 8 * and Gadi Oxman <gadio@netvision.net.il> 9 * and Andre Hedrick <andre@linux-ide.org> 10 * 11 * See linux/MAINTAINERS for address of current maintainer. 12 * 13 * This is the IDE probe module, as evolved from hd.c and ide.c. 14 * 15 * -- increase WAIT_PIDENTIFY to avoid CD-ROM locking at boot 16 * by Andrea Arcangeli 17 */ 18 19#include <linux/module.h> 20#include <linux/types.h> 21#include <linux/string.h> 22#include <linux/kernel.h> 23#include <linux/timer.h> 24#include <linux/mm.h> 25#include <linux/interrupt.h> 26#include <linux/major.h> 27#include <linux/errno.h> 28#include <linux/genhd.h> 29#include <linux/slab.h> 30#include <linux/delay.h> 31#include <linux/ide.h> 32#include <linux/spinlock.h> 33#include <linux/kmod.h> 34#include <linux/pci.h> 35#include <linux/scatterlist.h> 36 37#include <asm/byteorder.h> 38#include <asm/irq.h> 39#include <asm/uaccess.h> 40#include <asm/io.h> 41 42/** 43 * generic_id - add a generic drive id 44 * @drive: drive to make an ID block for 45 * 46 * Add a fake id field to the drive we are passed. This allows 47 * use to skip a ton of NULL checks (which people always miss) 48 * and make drive properties unconditional outside of this file 49 */ 50 51static void generic_id(ide_drive_t *drive) 52{ 53 drive->id->cyls = drive->cyl; 54 drive->id->heads = drive->head; 55 drive->id->sectors = drive->sect; 56 drive->id->cur_cyls = drive->cyl; 57 drive->id->cur_heads = drive->head; 58 drive->id->cur_sectors = drive->sect; 59} 60 61static void ide_disk_init_chs(ide_drive_t *drive) 62{ 63 struct hd_driveid *id = drive->id; 64 65 /* Extract geometry if we did not already have one for the drive */ 66 if (!drive->cyl || !drive->head || !drive->sect) { 67 drive->cyl = drive->bios_cyl = id->cyls; 68 drive->head = drive->bios_head = id->heads; 69 drive->sect = drive->bios_sect = id->sectors; 70 } 71 72 /* Handle logical geometry translation by the drive */ 73 if ((id->field_valid & 1) && id->cur_cyls && 74 id->cur_heads && (id->cur_heads <= 16) && id->cur_sectors) { 75 drive->cyl = id->cur_cyls; 76 drive->head = id->cur_heads; 77 drive->sect = id->cur_sectors; 78 } 79 80 /* Use physical geometry if what we have still makes no sense */ 81 if (drive->head > 16 && id->heads && id->heads <= 16) { 82 drive->cyl = id->cyls; 83 drive->head = id->heads; 84 drive->sect = id->sectors; 85 } 86} 87 88static void ide_disk_init_mult_count(ide_drive_t *drive) 89{ 90 struct hd_driveid *id = drive->id; 91 92 drive->mult_count = 0; 93 if (id->max_multsect) { 94#ifdef CONFIG_IDEDISK_MULTI_MODE 95 id->multsect = ((id->max_multsect/2) > 1) ? id->max_multsect : 0; 96 id->multsect_valid = id->multsect ? 1 : 0; 97 drive->mult_req = id->multsect_valid ? id->max_multsect : 0; 98 drive->special.b.set_multmode = drive->mult_req ? 1 : 0; 99#else /* original, pre IDE-NFG, per request of AC */ 100 drive->mult_req = 0; 101 if (drive->mult_req > id->max_multsect) 102 drive->mult_req = id->max_multsect; 103 if (drive->mult_req || ((id->multsect_valid & 1) && id->multsect)) 104 drive->special.b.set_multmode = 1; 105#endif 106 } 107} 108 109/** 110 * do_identify - identify a drive 111 * @drive: drive to identify 112 * @cmd: command used 113 * 114 * Called when we have issued a drive identify command to 115 * read and parse the results. This function is run with 116 * interrupts disabled. 117 */ 118 119static inline void do_identify (ide_drive_t *drive, u8 cmd) 120{ 121 ide_hwif_t *hwif = HWIF(drive); 122 int bswap = 1; 123 struct hd_driveid *id; 124 125 id = drive->id; 126 /* read 512 bytes of id info */ 127 hwif->input_data(drive, NULL, id, SECTOR_SIZE); 128 129 drive->id_read = 1; 130 local_irq_enable(); 131#ifdef DEBUG 132 printk(KERN_INFO "%s: dumping identify data\n", drive->name); 133 ide_dump_identify((u8 *)id); 134#endif 135 ide_fix_driveid(id); 136 137#if defined (CONFIG_SCSI_EATA_PIO) || defined (CONFIG_SCSI_EATA) 138 /* 139 * EATA SCSI controllers do a hardware ATA emulation: 140 * Ignore them if there is a driver for them available. 141 */ 142 if ((id->model[0] == 'P' && id->model[1] == 'M') || 143 (id->model[0] == 'S' && id->model[1] == 'K')) { 144 printk("%s: EATA SCSI HBA %.10s\n", drive->name, id->model); 145 goto err_misc; 146 } 147#endif /* CONFIG_SCSI_EATA || CONFIG_SCSI_EATA_PIO */ 148 149 /* 150 * WIN_IDENTIFY returns little-endian info, 151 * WIN_PIDENTIFY *usually* returns little-endian info. 152 */ 153 if (cmd == WIN_PIDENTIFY) { 154 if ((id->model[0] == 'N' && id->model[1] == 'E') /* NEC */ 155 || (id->model[0] == 'F' && id->model[1] == 'X') /* Mitsumi */ 156 || (id->model[0] == 'P' && id->model[1] == 'i'))/* Pioneer */ 157 /* Vertos drives may still be weird */ 158 bswap ^= 1; 159 } 160 ide_fixstring(id->model, sizeof(id->model), bswap); 161 ide_fixstring(id->fw_rev, sizeof(id->fw_rev), bswap); 162 ide_fixstring(id->serial_no, sizeof(id->serial_no), bswap); 163 164 /* we depend on this a lot! */ 165 id->model[sizeof(id->model)-1] = '\0'; 166 167 if (strstr(id->model, "E X A B Y T E N E S T")) 168 goto err_misc; 169 170 printk("%s: %s, ", drive->name, id->model); 171 drive->present = 1; 172 drive->dead = 0; 173 174 /* 175 * Check for an ATAPI device 176 */ 177 if (cmd == WIN_PIDENTIFY) { 178 u8 type = (id->config >> 8) & 0x1f; 179 printk("ATAPI "); 180 switch (type) { 181 case ide_floppy: 182 if (!strstr(id->model, "CD-ROM")) { 183 if (!strstr(id->model, "oppy") && 184 !strstr(id->model, "poyp") && 185 !strstr(id->model, "ZIP")) 186 printk("cdrom or floppy?, assuming "); 187 if (drive->media != ide_cdrom) { 188 printk ("FLOPPY"); 189 drive->removable = 1; 190 break; 191 } 192 } 193 /* Early cdrom models used zero */ 194 type = ide_cdrom; 195 case ide_cdrom: 196 drive->removable = 1; 197#ifdef CONFIG_PPC 198 /* kludge for Apple PowerBook internal zip */ 199 if (!strstr(id->model, "CD-ROM") && 200 strstr(id->model, "ZIP")) { 201 printk ("FLOPPY"); 202 type = ide_floppy; 203 break; 204 } 205#endif 206 printk ("CD/DVD-ROM"); 207 break; 208 case ide_tape: 209 printk ("TAPE"); 210 break; 211 case ide_optical: 212 printk ("OPTICAL"); 213 drive->removable = 1; 214 break; 215 default: 216 printk("UNKNOWN (type %d)", type); 217 break; 218 } 219 printk (" drive\n"); 220 drive->media = type; 221 /* an ATAPI device ignores DRDY */ 222 drive->ready_stat = 0; 223 return; 224 } 225 226 /* 227 * Not an ATAPI device: looks like a "regular" hard disk 228 */ 229 230 /* 231 * 0x848a = CompactFlash device 232 * These are *not* removable in Linux definition of the term 233 */ 234 235 if ((id->config != 0x848a) && (id->config & (1<<7))) 236 drive->removable = 1; 237 238 drive->media = ide_disk; 239 printk("%s DISK drive\n", (id->config == 0x848a) ? "CFA" : "ATA" ); 240 241 return; 242 243err_misc: 244 kfree(id); 245 drive->present = 0; 246 return; 247} 248 249/** 250 * actual_try_to_identify - send ata/atapi identify 251 * @drive: drive to identify 252 * @cmd: command to use 253 * 254 * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive 255 * and waits for a response. It also monitors irqs while this is 256 * happening, in hope of automatically determining which one is 257 * being used by the interface. 258 * 259 * Returns: 0 device was identified 260 * 1 device timed-out (no response to identify request) 261 * 2 device aborted the command (refused to identify itself) 262 */ 263 264static int actual_try_to_identify (ide_drive_t *drive, u8 cmd) 265{ 266 ide_hwif_t *hwif = HWIF(drive); 267 struct ide_io_ports *io_ports = &hwif->io_ports; 268 int use_altstatus = 0, rc; 269 unsigned long timeout; 270 u8 s = 0, a = 0; 271 272 /* take a deep breath */ 273 msleep(50); 274 275 if (io_ports->ctl_addr) { 276 a = ide_read_altstatus(drive); 277 s = ide_read_status(drive); 278 if ((a ^ s) & ~INDEX_STAT) 279 /* ancient Seagate drives, broken interfaces */ 280 printk(KERN_INFO "%s: probing with STATUS(0x%02x) " 281 "instead of ALTSTATUS(0x%02x)\n", 282 drive->name, s, a); 283 else 284 /* use non-intrusive polling */ 285 use_altstatus = 1; 286 } 287 288 /* set features register for atapi 289 * identify command to be sure of reply 290 */ 291 if ((cmd == WIN_PIDENTIFY)) 292 /* disable dma & overlap */ 293 hwif->OUTB(0, io_ports->feature_addr); 294 295 /* ask drive for ID */ 296 hwif->OUTBSYNC(drive, cmd, io_ports->command_addr); 297 298 timeout = ((cmd == WIN_IDENTIFY) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2; 299 timeout += jiffies; 300 do { 301 if (time_after(jiffies, timeout)) { 302 /* drive timed-out */ 303 return 1; 304 } 305 /* give drive a breather */ 306 msleep(50); 307 s = use_altstatus ? ide_read_altstatus(drive) 308 : ide_read_status(drive); 309 } while (s & BUSY_STAT); 310 311 /* wait for IRQ and DRQ_STAT */ 312 msleep(50); 313 s = ide_read_status(drive); 314 315 if (OK_STAT(s, DRQ_STAT, BAD_R_STAT)) { 316 unsigned long flags; 317 318 /* local CPU only; some systems need this */ 319 local_irq_save(flags); 320 /* drive returned ID */ 321 do_identify(drive, cmd); 322 /* drive responded with ID */ 323 rc = 0; 324 /* clear drive IRQ */ 325 (void)ide_read_status(drive); 326 local_irq_restore(flags); 327 } else { 328 /* drive refused ID */ 329 rc = 2; 330 } 331 return rc; 332} 333 334/** 335 * try_to_identify - try to identify a drive 336 * @drive: drive to probe 337 * @cmd: command to use 338 * 339 * Issue the identify command and then do IRQ probing to 340 * complete the identification when needed by finding the 341 * IRQ the drive is attached to 342 */ 343 344static int try_to_identify (ide_drive_t *drive, u8 cmd) 345{ 346 ide_hwif_t *hwif = HWIF(drive); 347 int retval; 348 int autoprobe = 0; 349 unsigned long cookie = 0; 350 351 /* 352 * Disable device irq unless we need to 353 * probe for it. Otherwise we'll get spurious 354 * interrupts during the identify-phase that 355 * the irq handler isn't expecting. 356 */ 357 if (hwif->io_ports.ctl_addr) { 358 if (!hwif->irq) { 359 autoprobe = 1; 360 cookie = probe_irq_on(); 361 } 362 ide_set_irq(drive, autoprobe); 363 } 364 365 retval = actual_try_to_identify(drive, cmd); 366 367 if (autoprobe) { 368 int irq; 369 370 ide_set_irq(drive, 0); 371 /* clear drive IRQ */ 372 (void)ide_read_status(drive); 373 udelay(5); 374 irq = probe_irq_off(cookie); 375 if (!hwif->irq) { 376 if (irq > 0) { 377 hwif->irq = irq; 378 } else { 379 /* Mmmm.. multiple IRQs.. 380 * don't know which was ours 381 */ 382 printk("%s: IRQ probe failed (0x%lx)\n", 383 drive->name, cookie); 384 } 385 } 386 } 387 return retval; 388} 389 390static int ide_busy_sleep(ide_hwif_t *hwif) 391{ 392 unsigned long timeout = jiffies + WAIT_WORSTCASE; 393 u8 stat; 394 395 do { 396 msleep(50); 397 stat = hwif->INB(hwif->io_ports.status_addr); 398 if ((stat & BUSY_STAT) == 0) 399 return 0; 400 } while (time_before(jiffies, timeout)); 401 402 return 1; 403} 404 405/** 406 * do_probe - probe an IDE device 407 * @drive: drive to probe 408 * @cmd: command to use 409 * 410 * do_probe() has the difficult job of finding a drive if it exists, 411 * without getting hung up if it doesn't exist, without trampling on 412 * ethernet cards, and without leaving any IRQs dangling to haunt us later. 413 * 414 * If a drive is "known" to exist (from CMOS or kernel parameters), 415 * but does not respond right away, the probe will "hang in there" 416 * for the maximum wait time (about 30 seconds), otherwise it will 417 * exit much more quickly. 418 * 419 * Returns: 0 device was identified 420 * 1 device timed-out (no response to identify request) 421 * 2 device aborted the command (refused to identify itself) 422 * 3 bad status from device (possible for ATAPI drives) 423 * 4 probe was not attempted because failure was obvious 424 */ 425 426static int do_probe (ide_drive_t *drive, u8 cmd) 427{ 428 ide_hwif_t *hwif = HWIF(drive); 429 struct ide_io_ports *io_ports = &hwif->io_ports; 430 int rc; 431 u8 stat; 432 433 if (drive->present) { 434 /* avoid waiting for inappropriate probes */ 435 if ((drive->media != ide_disk) && (cmd == WIN_IDENTIFY)) 436 return 4; 437 } 438#ifdef DEBUG 439 printk("probing for %s: present=%d, media=%d, probetype=%s\n", 440 drive->name, drive->present, drive->media, 441 (cmd == WIN_IDENTIFY) ? "ATA" : "ATAPI"); 442#endif 443 444 /* needed for some systems 445 * (e.g. crw9624 as drive0 with disk as slave) 446 */ 447 msleep(50); 448 SELECT_DRIVE(drive); 449 msleep(50); 450 if (hwif->INB(io_ports->device_addr) != drive->select.all && 451 !drive->present) { 452 if (drive->select.b.unit != 0) { 453 /* exit with drive0 selected */ 454 SELECT_DRIVE(&hwif->drives[0]); 455 /* allow BUSY_STAT to assert & clear */ 456 msleep(50); 457 } 458 /* no i/f present: mmm.. this should be a 4 -ml */ 459 return 3; 460 } 461 462 stat = ide_read_status(drive); 463 464 if (OK_STAT(stat, READY_STAT, BUSY_STAT) || 465 drive->present || cmd == WIN_PIDENTIFY) { 466 /* send cmd and wait */ 467 if ((rc = try_to_identify(drive, cmd))) { 468 /* failed: try again */ 469 rc = try_to_identify(drive,cmd); 470 } 471 472 stat = ide_read_status(drive); 473 474 if (stat == (BUSY_STAT | READY_STAT)) 475 return 4; 476 477 if (rc == 1 && cmd == WIN_PIDENTIFY) { 478 printk(KERN_ERR "%s: no response (status = 0x%02x), " 479 "resetting drive\n", drive->name, stat); 480 msleep(50); 481 hwif->OUTB(drive->select.all, io_ports->device_addr); 482 msleep(50); 483 hwif->OUTBSYNC(drive, WIN_SRST, io_ports->command_addr); 484 (void)ide_busy_sleep(hwif); 485 rc = try_to_identify(drive, cmd); 486 } 487 488 /* ensure drive IRQ is clear */ 489 stat = ide_read_status(drive); 490 491 if (rc == 1) 492 printk(KERN_ERR "%s: no response (status = 0x%02x)\n", 493 drive->name, stat); 494 } else { 495 /* not present or maybe ATAPI */ 496 rc = 3; 497 } 498 if (drive->select.b.unit != 0) { 499 /* exit with drive0 selected */ 500 SELECT_DRIVE(&hwif->drives[0]); 501 msleep(50); 502 /* ensure drive irq is clear */ 503 (void)ide_read_status(drive); 504 } 505 return rc; 506} 507 508/* 509 * 510 */ 511static void enable_nest (ide_drive_t *drive) 512{ 513 ide_hwif_t *hwif = HWIF(drive); 514 u8 stat; 515 516 printk("%s: enabling %s -- ", hwif->name, drive->id->model); 517 SELECT_DRIVE(drive); 518 msleep(50); 519 hwif->OUTBSYNC(drive, EXABYTE_ENABLE_NEST, hwif->io_ports.command_addr); 520 521 if (ide_busy_sleep(hwif)) { 522 printk(KERN_CONT "failed (timeout)\n"); 523 return; 524 } 525 526 msleep(50); 527 528 stat = ide_read_status(drive); 529 530 if (!OK_STAT(stat, 0, BAD_STAT)) 531 printk(KERN_CONT "failed (status = 0x%02x)\n", stat); 532 else 533 printk(KERN_CONT "success\n"); 534 535 /* if !(success||timed-out) */ 536 if (do_probe(drive, WIN_IDENTIFY) >= 2) { 537 /* look for ATAPI device */ 538 (void) do_probe(drive, WIN_PIDENTIFY); 539 } 540} 541 542/** 543 * probe_for_drives - upper level drive probe 544 * @drive: drive to probe for 545 * 546 * probe_for_drive() tests for existence of a given drive using do_probe() 547 * and presents things to the user as needed. 548 * 549 * Returns: 0 no device was found 550 * 1 device was found (note: drive->present might 551 * still be 0) 552 */ 553 554static inline u8 probe_for_drive (ide_drive_t *drive) 555{ 556 /* 557 * In order to keep things simple we have an id 558 * block for all drives at all times. If the device 559 * is pre ATA or refuses ATA/ATAPI identify we 560 * will add faked data to this. 561 * 562 * Also note that 0 everywhere means "can't do X" 563 */ 564 565 drive->id = kzalloc(SECTOR_WORDS *4, GFP_KERNEL); 566 drive->id_read = 0; 567 if(drive->id == NULL) 568 { 569 printk(KERN_ERR "ide: out of memory for id data.\n"); 570 return 0; 571 } 572 strcpy(drive->id->model, "UNKNOWN"); 573 574 /* skip probing? */ 575 if (!drive->noprobe) 576 { 577 /* if !(success||timed-out) */ 578 if (do_probe(drive, WIN_IDENTIFY) >= 2) { 579 /* look for ATAPI device */ 580 (void) do_probe(drive, WIN_PIDENTIFY); 581 } 582 if (!drive->present) 583 /* drive not found */ 584 return 0; 585 if (strstr(drive->id->model, "E X A B Y T E N E S T")) 586 enable_nest(drive); 587 588 /* identification failed? */ 589 if (!drive->id_read) { 590 if (drive->media == ide_disk) { 591 printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n", 592 drive->name, drive->cyl, 593 drive->head, drive->sect); 594 } else if (drive->media == ide_cdrom) { 595 printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name); 596 } else { 597 /* nuke it */ 598 printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name); 599 drive->present = 0; 600 } 601 } 602 /* drive was found */ 603 } 604 if(!drive->present) 605 return 0; 606 /* The drive wasn't being helpful. Add generic info only */ 607 if (drive->id_read == 0) { 608 generic_id(drive); 609 return 1; 610 } 611 612 if (drive->media == ide_disk) { 613 ide_disk_init_chs(drive); 614 ide_disk_init_mult_count(drive); 615 } 616 617 return drive->present; 618} 619 620static void hwif_release_dev (struct device *dev) 621{ 622 ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev); 623 624 complete(&hwif->gendev_rel_comp); 625} 626 627static int ide_register_port(ide_hwif_t *hwif) 628{ 629 int ret; 630 631 /* register with global device tree */ 632 strlcpy(hwif->gendev.bus_id,hwif->name,BUS_ID_SIZE); 633 hwif->gendev.driver_data = hwif; 634 if (hwif->gendev.parent == NULL) { 635 if (hwif->dev) 636 hwif->gendev.parent = hwif->dev; 637 else 638 /* Would like to do = &device_legacy */ 639 hwif->gendev.parent = NULL; 640 } 641 hwif->gendev.release = hwif_release_dev; 642 ret = device_register(&hwif->gendev); 643 if (ret < 0) { 644 printk(KERN_WARNING "IDE: %s: device_register error: %d\n", 645 __func__, ret); 646 goto out; 647 } 648 649 get_device(&hwif->gendev); 650 651 hwif->portdev = device_create_drvdata(ide_port_class, &hwif->gendev, 652 MKDEV(0, 0), hwif, hwif->name); 653 if (IS_ERR(hwif->portdev)) { 654 ret = PTR_ERR(hwif->portdev); 655 device_unregister(&hwif->gendev); 656 } 657out: 658 return ret; 659} 660 661/** 662 * ide_port_wait_ready - wait for port to become ready 663 * @hwif: IDE port 664 * 665 * This is needed on some PPCs and a bunch of BIOS-less embedded 666 * platforms. Typical cases are: 667 * 668 * - The firmware hard reset the disk before booting the kernel, 669 * the drive is still doing it's poweron-reset sequence, that 670 * can take up to 30 seconds. 671 * 672 * - The firmware does nothing (or no firmware), the device is 673 * still in POST state (same as above actually). 674 * 675 * - Some CD/DVD/Writer combo drives tend to drive the bus during 676 * their reset sequence even when they are non-selected slave 677 * devices, thus preventing discovery of the main HD. 678 * 679 * Doing this wait-for-non-busy should not harm any existing 680 * configuration and fix some issues like the above. 681 * 682 * BenH. 683 * 684 * Returns 0 on success, error code (< 0) otherwise. 685 */ 686 687static int ide_port_wait_ready(ide_hwif_t *hwif) 688{ 689 int unit, rc; 690 691 printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name); 692 693 /* Let HW settle down a bit from whatever init state we 694 * come from */ 695 mdelay(2); 696 697 /* Wait for BSY bit to go away, spec timeout is 30 seconds, 698 * I know of at least one disk who takes 31 seconds, I use 35 699 * here to be safe 700 */ 701 rc = ide_wait_not_busy(hwif, 35000); 702 if (rc) 703 return rc; 704 705 /* Now make sure both master & slave are ready */ 706 for (unit = 0; unit < MAX_DRIVES; unit++) { 707 ide_drive_t *drive = &hwif->drives[unit]; 708 709 /* Ignore disks that we will not probe for later. */ 710 if (!drive->noprobe || drive->present) { 711 SELECT_DRIVE(drive); 712 ide_set_irq(drive, 1); 713 mdelay(2); 714 rc = ide_wait_not_busy(hwif, 35000); 715 if (rc) 716 goto out; 717 } else 718 printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n", 719 drive->name); 720 } 721out: 722 /* Exit function with master reselected (let's be sane) */ 723 if (unit) 724 SELECT_DRIVE(&hwif->drives[0]); 725 726 return rc; 727} 728 729/** 730 * ide_undecoded_slave - look for bad CF adapters 731 * @drive1: drive 732 * 733 * Analyse the drives on the interface and attempt to decide if we 734 * have the same drive viewed twice. This occurs with crap CF adapters 735 * and PCMCIA sometimes. 736 */ 737 738void ide_undecoded_slave(ide_drive_t *drive1) 739{ 740 ide_drive_t *drive0 = &drive1->hwif->drives[0]; 741 742 if ((drive1->dn & 1) == 0 || drive0->present == 0) 743 return; 744 745 /* If the models don't match they are not the same product */ 746 if (strcmp(drive0->id->model, drive1->id->model)) 747 return; 748 749 /* Serial numbers do not match */ 750 if (strncmp(drive0->id->serial_no, drive1->id->serial_no, 20)) 751 return; 752 753 /* No serial number, thankfully very rare for CF */ 754 if (drive0->id->serial_no[0] == 0) 755 return; 756 757 /* Appears to be an IDE flash adapter with decode bugs */ 758 printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n"); 759 760 drive1->present = 0; 761} 762 763EXPORT_SYMBOL_GPL(ide_undecoded_slave); 764 765static int ide_probe_port(ide_hwif_t *hwif) 766{ 767 unsigned long flags; 768 unsigned int irqd; 769 int unit, rc = -ENODEV; 770 771 BUG_ON(hwif->present); 772 773 if (hwif->drives[0].noprobe && hwif->drives[1].noprobe) 774 return -EACCES; 775 776 /* 777 * We must always disable IRQ, as probe_for_drive will assert IRQ, but 778 * we'll install our IRQ driver much later... 779 */ 780 irqd = hwif->irq; 781 if (irqd) 782 disable_irq(hwif->irq); 783 784 local_irq_set(flags); 785 786 if (ide_port_wait_ready(hwif) == -EBUSY) 787 printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name); 788 789 /* 790 * Second drive should only exist if first drive was found, 791 * but a lot of cdrom drives are configured as single slaves. 792 */ 793 for (unit = 0; unit < MAX_DRIVES; ++unit) { 794 ide_drive_t *drive = &hwif->drives[unit]; 795 drive->dn = (hwif->channel ? 2 : 0) + unit; 796 (void) probe_for_drive(drive); 797 if (drive->present) 798 rc = 0; 799 } 800 801 local_irq_restore(flags); 802 803 /* 804 * Use cached IRQ number. It might be (and is...) changed by probe 805 * code above 806 */ 807 if (irqd) 808 enable_irq(irqd); 809 810 return rc; 811} 812 813static void ide_port_tune_devices(ide_hwif_t *hwif) 814{ 815 const struct ide_port_ops *port_ops = hwif->port_ops; 816 int unit; 817 818 for (unit = 0; unit < MAX_DRIVES; unit++) { 819 ide_drive_t *drive = &hwif->drives[unit]; 820 821 if (drive->present && port_ops && port_ops->quirkproc) 822 port_ops->quirkproc(drive); 823 } 824 825 for (unit = 0; unit < MAX_DRIVES; ++unit) { 826 ide_drive_t *drive = &hwif->drives[unit]; 827 828 if (drive->present) { 829 ide_set_max_pio(drive); 830 831 drive->nice1 = 1; 832 833 if (hwif->dma_ops) 834 ide_set_dma(drive); 835 } 836 } 837 838 for (unit = 0; unit < MAX_DRIVES; ++unit) { 839 ide_drive_t *drive = &hwif->drives[unit]; 840 841 if (hwif->host_flags & IDE_HFLAG_NO_IO_32BIT) 842 drive->no_io_32bit = 1; 843 else 844 drive->no_io_32bit = drive->id->dword_io ? 1 : 0; 845 } 846} 847 848#if MAX_HWIFS > 1 849/* 850 * save_match() is used to simplify logic in init_irq() below. 851 * 852 * A loophole here is that we may not know about a particular 853 * hwif's irq until after that hwif is actually probed/initialized.. 854 * This could be a problem for the case where an hwif is on a 855 * dual interface that requires serialization (eg. cmd640) and another 856 * hwif using one of the same irqs is initialized beforehand. 857 * 858 * This routine detects and reports such situations, but does not fix them. 859 */ 860static void save_match(ide_hwif_t *hwif, ide_hwif_t *new, ide_hwif_t **match) 861{ 862 ide_hwif_t *m = *match; 863 864 if (m && m->hwgroup && m->hwgroup != new->hwgroup) { 865 if (!new->hwgroup) 866 return; 867 printk("%s: potential irq problem with %s and %s\n", 868 hwif->name, new->name, m->name); 869 } 870 if (!m || m->irq != hwif->irq) /* don't undo a prior perfect match */ 871 *match = new; 872} 873#endif /* MAX_HWIFS > 1 */ 874 875/* 876 * init request queue 877 */ 878static int ide_init_queue(ide_drive_t *drive) 879{ 880 struct request_queue *q; 881 ide_hwif_t *hwif = HWIF(drive); 882 int max_sectors = 256; 883 int max_sg_entries = PRD_ENTRIES; 884 885 /* 886 * Our default set up assumes the normal IDE case, 887 * that is 64K segmenting, standard PRD setup 888 * and LBA28. Some drivers then impose their own 889 * limits and LBA48 we could raise it but as yet 890 * do not. 891 */ 892 893 q = blk_init_queue_node(do_ide_request, &ide_lock, hwif_to_node(hwif)); 894 if (!q) 895 return 1; 896 897 q->queuedata = drive; 898 blk_queue_segment_boundary(q, 0xffff); 899 900 if (hwif->rqsize < max_sectors) 901 max_sectors = hwif->rqsize; 902 blk_queue_max_sectors(q, max_sectors); 903 904#ifdef CONFIG_PCI 905 /* When we have an IOMMU, we may have a problem where pci_map_sg() 906 * creates segments that don't completely match our boundary 907 * requirements and thus need to be broken up again. Because it 908 * doesn't align properly either, we may actually have to break up 909 * to more segments than what was we got in the first place, a max 910 * worst case is twice as many. 911 * This will be fixed once we teach pci_map_sg() about our boundary 912 * requirements, hopefully soon. *FIXME* 913 */ 914 if (!PCI_DMA_BUS_IS_PHYS) 915 max_sg_entries >>= 1; 916#endif /* CONFIG_PCI */ 917 918 blk_queue_max_hw_segments(q, max_sg_entries); 919 blk_queue_max_phys_segments(q, max_sg_entries); 920 921 /* assign drive queue */ 922 drive->queue = q; 923 924 /* needs drive->queue to be set */ 925 ide_toggle_bounce(drive, 1); 926 927 return 0; 928} 929 930static void ide_add_drive_to_hwgroup(ide_drive_t *drive) 931{ 932 ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; 933 934 spin_lock_irq(&ide_lock); 935 if (!hwgroup->drive) { 936 /* first drive for hwgroup. */ 937 drive->next = drive; 938 hwgroup->drive = drive; 939 hwgroup->hwif = HWIF(hwgroup->drive); 940 } else { 941 drive->next = hwgroup->drive->next; 942 hwgroup->drive->next = drive; 943 } 944 spin_unlock_irq(&ide_lock); 945} 946 947/* 948 * For any present drive: 949 * - allocate the block device queue 950 * - link drive into the hwgroup 951 */ 952static void ide_port_setup_devices(ide_hwif_t *hwif) 953{ 954 int i; 955 956 mutex_lock(&ide_cfg_mtx); 957 for (i = 0; i < MAX_DRIVES; i++) { 958 ide_drive_t *drive = &hwif->drives[i]; 959 960 if (!drive->present) 961 continue; 962 963 if (ide_init_queue(drive)) { 964 printk(KERN_ERR "ide: failed to init %s\n", 965 drive->name); 966 continue; 967 } 968 969 ide_add_drive_to_hwgroup(drive); 970 } 971 mutex_unlock(&ide_cfg_mtx); 972} 973 974/* 975 * This routine sets up the irq for an ide interface, and creates a new 976 * hwgroup for the irq/hwif if none was previously assigned. 977 * 978 * Much of the code is for correctly detecting/handling irq sharing 979 * and irq serialization situations. This is somewhat complex because 980 * it handles static as well as dynamic (PCMCIA) IDE interfaces. 981 */ 982static int init_irq (ide_hwif_t *hwif) 983{ 984 struct ide_io_ports *io_ports = &hwif->io_ports; 985 unsigned int index; 986 ide_hwgroup_t *hwgroup; 987 ide_hwif_t *match = NULL; 988 989 990 BUG_ON(in_interrupt()); 991 BUG_ON(irqs_disabled()); 992 BUG_ON(hwif == NULL); 993 994 mutex_lock(&ide_cfg_mtx); 995 hwif->hwgroup = NULL; 996#if MAX_HWIFS > 1 997 /* 998 * Group up with any other hwifs that share our irq(s). 999 */ 1000 for (index = 0; index < MAX_HWIFS; index++) { 1001 ide_hwif_t *h = &ide_hwifs[index]; 1002 if (h->hwgroup) { /* scan only initialized hwif's */ 1003 if (hwif->irq == h->irq) { 1004 hwif->sharing_irq = h->sharing_irq = 1; 1005 if (hwif->chipset != ide_pci || 1006 h->chipset != ide_pci) { 1007 save_match(hwif, h, &match); 1008 } 1009 } 1010 if (hwif->serialized) { 1011 if (hwif->mate && hwif->mate->irq == h->irq) 1012 save_match(hwif, h, &match); 1013 } 1014 if (h->serialized) { 1015 if (h->mate && hwif->irq == h->mate->irq) 1016 save_match(hwif, h, &match); 1017 } 1018 } 1019 } 1020#endif /* MAX_HWIFS > 1 */ 1021 /* 1022 * If we are still without a hwgroup, then form a new one 1023 */ 1024 if (match) { 1025 hwgroup = match->hwgroup; 1026 hwif->hwgroup = hwgroup; 1027 /* 1028 * Link us into the hwgroup. 1029 * This must be done early, do ensure that unexpected_intr 1030 * can find the hwif and prevent irq storms. 1031 * No drives are attached to the new hwif, choose_drive 1032 * can't do anything stupid (yet). 1033 * Add ourself as the 2nd entry to the hwgroup->hwif 1034 * linked list, the first entry is the hwif that owns 1035 * hwgroup->handler - do not change that. 1036 */ 1037 spin_lock_irq(&ide_lock); 1038 hwif->next = hwgroup->hwif->next; 1039 hwgroup->hwif->next = hwif; 1040 BUG_ON(hwif->next == hwif); 1041 spin_unlock_irq(&ide_lock); 1042 } else { 1043 hwgroup = kmalloc_node(sizeof(*hwgroup), GFP_KERNEL|__GFP_ZERO, 1044 hwif_to_node(hwif)); 1045 if (hwgroup == NULL) 1046 goto out_up; 1047 1048 hwif->hwgroup = hwgroup; 1049 hwgroup->hwif = hwif->next = hwif; 1050 1051 init_timer(&hwgroup->timer); 1052 hwgroup->timer.function = &ide_timer_expiry; 1053 hwgroup->timer.data = (unsigned long) hwgroup; 1054 } 1055 1056 /* 1057 * Allocate the irq, if not already obtained for another hwif 1058 */ 1059 if (!match || match->irq != hwif->irq) { 1060 int sa = 0; 1061#if defined(__mc68000__) 1062 sa = IRQF_SHARED; 1063#endif /* __mc68000__ */ 1064 1065 if (IDE_CHIPSET_IS_PCI(hwif->chipset)) 1066 sa = IRQF_SHARED; 1067 1068 if (io_ports->ctl_addr) 1069 /* clear nIEN */ 1070 hwif->OUTB(0x08, io_ports->ctl_addr); 1071 1072 if (request_irq(hwif->irq,&ide_intr,sa,hwif->name,hwgroup)) 1073 goto out_unlink; 1074 } 1075 1076 if (!hwif->rqsize) { 1077 if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) || 1078 (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA)) 1079 hwif->rqsize = 256; 1080 else 1081 hwif->rqsize = 65536; 1082 } 1083 1084#if !defined(__mc68000__) 1085 printk("%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name, 1086 io_ports->data_addr, io_ports->status_addr, 1087 io_ports->ctl_addr, hwif->irq); 1088#else 1089 printk("%s at 0x%08lx on irq %d", hwif->name, 1090 io_ports->data_addr, hwif->irq); 1091#endif /* __mc68000__ */ 1092 if (match) 1093 printk(" (%sed with %s)", 1094 hwif->sharing_irq ? "shar" : "serializ", match->name); 1095 printk("\n"); 1096 1097 mutex_unlock(&ide_cfg_mtx); 1098 return 0; 1099out_unlink: 1100 ide_remove_port_from_hwgroup(hwif); 1101out_up: 1102 mutex_unlock(&ide_cfg_mtx); 1103 return 1; 1104} 1105 1106static int ata_lock(dev_t dev, void *data) 1107{ 1108 /* FIXME: we want to pin hwif down */ 1109 return 0; 1110} 1111 1112static struct kobject *ata_probe(dev_t dev, int *part, void *data) 1113{ 1114 ide_hwif_t *hwif = data; 1115 int unit = *part >> PARTN_BITS; 1116 ide_drive_t *drive = &hwif->drives[unit]; 1117 if (!drive->present) 1118 return NULL; 1119 1120 if (drive->media == ide_disk) 1121 request_module("ide-disk"); 1122 if (drive->scsi) 1123 request_module("ide-scsi"); 1124 if (drive->media == ide_cdrom || drive->media == ide_optical) 1125 request_module("ide-cd"); 1126 if (drive->media == ide_tape) 1127 request_module("ide-tape"); 1128 if (drive->media == ide_floppy) 1129 request_module("ide-floppy"); 1130 1131 return NULL; 1132} 1133 1134static struct kobject *exact_match(dev_t dev, int *part, void *data) 1135{ 1136 struct gendisk *p = data; 1137 *part &= (1 << PARTN_BITS) - 1; 1138 return &p->dev.kobj; 1139} 1140 1141static int exact_lock(dev_t dev, void *data) 1142{ 1143 struct gendisk *p = data; 1144 1145 if (!get_disk(p)) 1146 return -1; 1147 return 0; 1148} 1149 1150void ide_register_region(struct gendisk *disk) 1151{ 1152 blk_register_region(MKDEV(disk->major, disk->first_minor), 1153 disk->minors, NULL, exact_match, exact_lock, disk); 1154} 1155 1156EXPORT_SYMBOL_GPL(ide_register_region); 1157 1158void ide_unregister_region(struct gendisk *disk) 1159{ 1160 blk_unregister_region(MKDEV(disk->major, disk->first_minor), 1161 disk->minors); 1162} 1163 1164EXPORT_SYMBOL_GPL(ide_unregister_region); 1165 1166void ide_init_disk(struct gendisk *disk, ide_drive_t *drive) 1167{ 1168 ide_hwif_t *hwif = drive->hwif; 1169 unsigned int unit = (drive->select.all >> 4) & 1; 1170 1171 disk->major = hwif->major; 1172 disk->first_minor = unit << PARTN_BITS; 1173 sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit); 1174 disk->queue = drive->queue; 1175} 1176 1177EXPORT_SYMBOL_GPL(ide_init_disk); 1178 1179static void ide_remove_drive_from_hwgroup(ide_drive_t *drive) 1180{ 1181 ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; 1182 1183 if (drive == drive->next) { 1184 /* special case: last drive from hwgroup. */ 1185 BUG_ON(hwgroup->drive != drive); 1186 hwgroup->drive = NULL; 1187 } else { 1188 ide_drive_t *walk; 1189 1190 walk = hwgroup->drive; 1191 while (walk->next != drive) 1192 walk = walk->next; 1193 walk->next = drive->next; 1194 if (hwgroup->drive == drive) { 1195 hwgroup->drive = drive->next; 1196 hwgroup->hwif = hwgroup->drive->hwif; 1197 } 1198 } 1199 BUG_ON(hwgroup->drive == drive); 1200} 1201 1202static void drive_release_dev (struct device *dev) 1203{ 1204 ide_drive_t *drive = container_of(dev, ide_drive_t, gendev); 1205 1206 ide_proc_unregister_device(drive); 1207 1208 spin_lock_irq(&ide_lock); 1209 ide_remove_drive_from_hwgroup(drive); 1210 kfree(drive->id); 1211 drive->id = NULL; 1212 drive->present = 0; 1213 /* Messed up locking ... */ 1214 spin_unlock_irq(&ide_lock); 1215 blk_cleanup_queue(drive->queue); 1216 spin_lock_irq(&ide_lock); 1217 drive->queue = NULL; 1218 spin_unlock_irq(&ide_lock); 1219 1220 complete(&drive->gendev_rel_comp); 1221} 1222 1223#ifndef ide_default_irq 1224#define ide_default_irq(irq) 0 1225#endif 1226 1227static int hwif_init(ide_hwif_t *hwif) 1228{ 1229 int old_irq; 1230 1231 if (!hwif->irq) { 1232 hwif->irq = ide_default_irq(hwif->io_ports.data_addr); 1233 if (!hwif->irq) { 1234 printk("%s: DISABLED, NO IRQ\n", hwif->name); 1235 return 0; 1236 } 1237 } 1238 1239 if (register_blkdev(hwif->major, hwif->name)) 1240 return 0; 1241 1242 if (!hwif->sg_max_nents) 1243 hwif->sg_max_nents = PRD_ENTRIES; 1244 1245 hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents, 1246 GFP_KERNEL); 1247 if (!hwif->sg_table) { 1248 printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name); 1249 goto out; 1250 } 1251 1252 sg_init_table(hwif->sg_table, hwif->sg_max_nents); 1253 1254 if (init_irq(hwif) == 0) 1255 goto done; 1256 1257 old_irq = hwif->irq; 1258 /* 1259 * It failed to initialise. Find the default IRQ for 1260 * this port and try that. 1261 */ 1262 hwif->irq = ide_default_irq(hwif->io_ports.data_addr); 1263 if (!hwif->irq) { 1264 printk("%s: Disabled unable to get IRQ %d.\n", 1265 hwif->name, old_irq); 1266 goto out; 1267 } 1268 if (init_irq(hwif)) { 1269 printk("%s: probed IRQ %d and default IRQ %d failed.\n", 1270 hwif->name, old_irq, hwif->irq); 1271 goto out; 1272 } 1273 printk("%s: probed IRQ %d failed, using default.\n", 1274 hwif->name, hwif->irq); 1275 1276done: 1277 blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS, 1278 THIS_MODULE, ata_probe, ata_lock, hwif); 1279 return 1; 1280 1281out: 1282 unregister_blkdev(hwif->major, hwif->name); 1283 return 0; 1284} 1285 1286static void hwif_register_devices(ide_hwif_t *hwif) 1287{ 1288 unsigned int i; 1289 1290 for (i = 0; i < MAX_DRIVES; i++) { 1291 ide_drive_t *drive = &hwif->drives[i]; 1292 struct device *dev = &drive->gendev; 1293 int ret; 1294 1295 if (!drive->present) 1296 continue; 1297 1298 ide_add_generic_settings(drive); 1299 1300 snprintf(dev->bus_id, BUS_ID_SIZE, "%u.%u", hwif->index, i); 1301 dev->parent = &hwif->gendev; 1302 dev->bus = &ide_bus_type; 1303 dev->driver_data = drive; 1304 dev->release = drive_release_dev; 1305 1306 ret = device_register(dev); 1307 if (ret < 0) 1308 printk(KERN_WARNING "IDE: %s: device_register error: " 1309 "%d\n", __func__, ret); 1310 } 1311} 1312 1313static void ide_port_init_devices(ide_hwif_t *hwif) 1314{ 1315 const struct ide_port_ops *port_ops = hwif->port_ops; 1316 int i; 1317 1318 for (i = 0; i < MAX_DRIVES; i++) { 1319 ide_drive_t *drive = &hwif->drives[i]; 1320 1321 if (hwif->host_flags & IDE_HFLAG_IO_32BIT) 1322 drive->io_32bit = 1; 1323 if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS) 1324 drive->unmask = 1; 1325 if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS) 1326 drive->no_unmask = 1; 1327 } 1328 1329 if (port_ops && port_ops->port_init_devs) 1330 port_ops->port_init_devs(hwif); 1331} 1332 1333static void ide_init_port(ide_hwif_t *hwif, unsigned int port, 1334 const struct ide_port_info *d) 1335{ 1336 hwif->channel = port; 1337 1338 if (d->chipset) 1339 hwif->chipset = d->chipset; 1340 1341 if (d->init_iops) 1342 d->init_iops(hwif); 1343 1344 if ((!hwif->irq && (d->host_flags & IDE_HFLAG_LEGACY_IRQS)) || 1345 (d->host_flags & IDE_HFLAG_FORCE_LEGACY_IRQS)) 1346 hwif->irq = port ? 15 : 14; 1347 1348 /* ->host_flags may be set by ->init_iops (or even earlier...) */ 1349 hwif->host_flags |= d->host_flags; 1350 hwif->pio_mask = d->pio_mask; 1351 1352 /* ->set_pio_mode for DTC2278 is currently limited to port 0 */ 1353 if (hwif->chipset != ide_dtc2278 || hwif->channel == 0) 1354 hwif->port_ops = d->port_ops; 1355 1356 hwif->swdma_mask = d->swdma_mask; 1357 hwif->mwdma_mask = d->mwdma_mask; 1358 hwif->ultra_mask = d->udma_mask; 1359 1360 if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) { 1361 int rc; 1362 1363 if (d->init_dma) 1364 rc = d->init_dma(hwif, d); 1365 else 1366 rc = ide_hwif_setup_dma(hwif, d); 1367 1368 if (rc < 0) { 1369 printk(KERN_INFO "%s: DMA disabled\n", hwif->name); 1370 hwif->swdma_mask = 0; 1371 hwif->mwdma_mask = 0; 1372 hwif->ultra_mask = 0; 1373 } else if (d->dma_ops) 1374 hwif->dma_ops = d->dma_ops; 1375 } 1376 1377 if ((d->host_flags & IDE_HFLAG_SERIALIZE) || 1378 ((d->host_flags & IDE_HFLAG_SERIALIZE_DMA) && hwif->dma_base)) { 1379 if (hwif->mate) 1380 hwif->mate->serialized = hwif->serialized = 1; 1381 } 1382 1383 if (d->host_flags & IDE_HFLAG_RQSIZE_256) 1384 hwif->rqsize = 256; 1385 1386 /* call chipset specific routine for each enabled port */ 1387 if (d->init_hwif) 1388 d->init_hwif(hwif); 1389} 1390 1391static void ide_port_cable_detect(ide_hwif_t *hwif) 1392{ 1393 const struct ide_port_ops *port_ops = hwif->port_ops; 1394 1395 if (port_ops && port_ops->cable_detect && (hwif->ultra_mask & 0x78)) { 1396 if (hwif->cbl != ATA_CBL_PATA40_SHORT) 1397 hwif->cbl = port_ops->cable_detect(hwif); 1398 } 1399} 1400 1401static ssize_t store_delete_devices(struct device *portdev, 1402 struct device_attribute *attr, 1403 const char *buf, size_t n) 1404{ 1405 ide_hwif_t *hwif = dev_get_drvdata(portdev); 1406 1407 if (strncmp(buf, "1", n)) 1408 return -EINVAL; 1409 1410 ide_port_unregister_devices(hwif); 1411 1412 return n; 1413}; 1414 1415static DEVICE_ATTR(delete_devices, S_IWUSR, NULL, store_delete_devices); 1416 1417static ssize_t store_scan(struct device *portdev, 1418 struct device_attribute *attr, 1419 const char *buf, size_t n) 1420{ 1421 ide_hwif_t *hwif = dev_get_drvdata(portdev); 1422 1423 if (strncmp(buf, "1", n)) 1424 return -EINVAL; 1425 1426 ide_port_unregister_devices(hwif); 1427 ide_port_scan(hwif); 1428 1429 return n; 1430}; 1431 1432static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan); 1433 1434static struct device_attribute *ide_port_attrs[] = { 1435 &dev_attr_delete_devices, 1436 &dev_attr_scan, 1437 NULL 1438}; 1439 1440static int ide_sysfs_register_port(ide_hwif_t *hwif) 1441{ 1442 int i, rc; 1443 1444 for (i = 0; ide_port_attrs[i]; i++) { 1445 rc = device_create_file(hwif->portdev, ide_port_attrs[i]); 1446 if (rc) 1447 break; 1448 } 1449 1450 return rc; 1451} 1452 1453/** 1454 * ide_find_port_slot - find free ide_hwifs[] slot 1455 * @d: IDE port info 1456 * 1457 * Return the new hwif. If we are out of free slots return NULL. 1458 */ 1459 1460ide_hwif_t *ide_find_port_slot(const struct ide_port_info *d) 1461{ 1462 ide_hwif_t *hwif; 1463 int i; 1464 u8 bootable = (d && (d->host_flags & IDE_HFLAG_NON_BOOTABLE)) ? 0 : 1; 1465 1466 /* 1467 * Claim an unassigned slot. 1468 * 1469 * Give preference to claiming other slots before claiming ide0/ide1, 1470 * just in case there's another interface yet-to-be-scanned 1471 * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults). 1472 * 1473 * Unless there is a bootable card that does not use the standard 1474 * ports 0x1f0/0x170 (the ide0/ide1 defaults). 1475 */ 1476 if (bootable) { 1477 i = (d && (d->host_flags & IDE_HFLAG_QD_2ND_PORT)) ? 1 : 0; 1478 1479 for (; i < MAX_HWIFS; i++) { 1480 hwif = &ide_hwifs[i]; 1481 if (hwif->chipset == ide_unknown) 1482 return hwif; 1483 } 1484 } else { 1485 for (i = 2; i < MAX_HWIFS; i++) { 1486 hwif = &ide_hwifs[i]; 1487 if (hwif->chipset == ide_unknown) 1488 return hwif; 1489 } 1490 for (i = 0; i < 2 && i < MAX_HWIFS; i++) { 1491 hwif = &ide_hwifs[i]; 1492 if (hwif->chipset == ide_unknown) 1493 return hwif; 1494 } 1495 } 1496 1497 return NULL; 1498} 1499EXPORT_SYMBOL_GPL(ide_find_port_slot); 1500 1501int ide_device_add_all(u8 *idx, const struct ide_port_info *d) 1502{ 1503 ide_hwif_t *hwif, *mate = NULL; 1504 int i, rc = 0; 1505 1506 for (i = 0; i < MAX_HWIFS; i++) { 1507 if (idx[i] == 0xff) { 1508 mate = NULL; 1509 continue; 1510 } 1511 1512 hwif = &ide_hwifs[idx[i]]; 1513 1514 ide_port_apply_params(hwif); 1515 1516 if (d == NULL) { 1517 mate = NULL; 1518 continue; 1519 } 1520 1521 if ((i & 1) && mate) { 1522 hwif->mate = mate; 1523 mate->mate = hwif; 1524 } 1525 1526 mate = (i & 1) ? NULL : hwif; 1527 1528 ide_init_port(hwif, i & 1, d); 1529 ide_port_cable_detect(hwif); 1530 ide_port_init_devices(hwif); 1531 } 1532 1533 for (i = 0; i < MAX_HWIFS; i++) { 1534 if (idx[i] == 0xff) 1535 continue; 1536 1537 hwif = &ide_hwifs[idx[i]]; 1538 1539 if (ide_probe_port(hwif) == 0) 1540 hwif->present = 1; 1541 1542 if (hwif->chipset != ide_4drives || !hwif->mate || 1543 !hwif->mate->present) 1544 ide_register_port(hwif); 1545 1546 if (hwif->present) 1547 ide_port_tune_devices(hwif); 1548 } 1549 1550 for (i = 0; i < MAX_HWIFS; i++) { 1551 if (idx[i] == 0xff) 1552 continue; 1553 1554 hwif = &ide_hwifs[idx[i]]; 1555 1556 if (hwif_init(hwif) == 0) { 1557 printk(KERN_INFO "%s: failed to initialize IDE " 1558 "interface\n", hwif->name); 1559 hwif->present = 0; 1560 rc = -1; 1561 continue; 1562 } 1563 1564 if (hwif->present) 1565 ide_port_setup_devices(hwif); 1566 1567 ide_acpi_init(hwif); 1568 1569 if (hwif->present) 1570 ide_acpi_port_init_devices(hwif); 1571 } 1572 1573 for (i = 0; i < MAX_HWIFS; i++) { 1574 if (idx[i] == 0xff) 1575 continue; 1576 1577 hwif = &ide_hwifs[idx[i]]; 1578 1579 if (hwif->chipset == ide_unknown) 1580 hwif->chipset = ide_generic; 1581 1582 if (hwif->present) 1583 hwif_register_devices(hwif); 1584 } 1585 1586 for (i = 0; i < MAX_HWIFS; i++) { 1587 if (idx[i] == 0xff) 1588 continue; 1589 1590 hwif = &ide_hwifs[idx[i]]; 1591 1592 ide_sysfs_register_port(hwif); 1593 ide_proc_register_port(hwif); 1594 1595 if (hwif->present) 1596 ide_proc_port_register_devices(hwif); 1597 } 1598 1599 return rc; 1600} 1601EXPORT_SYMBOL_GPL(ide_device_add_all); 1602 1603int ide_device_add(u8 idx[4], const struct ide_port_info *d) 1604{ 1605 u8 idx_all[MAX_HWIFS]; 1606 int i; 1607 1608 for (i = 0; i < MAX_HWIFS; i++) 1609 idx_all[i] = (i < 4) ? idx[i] : 0xff; 1610 1611 return ide_device_add_all(idx_all, d); 1612} 1613EXPORT_SYMBOL_GPL(ide_device_add); 1614 1615void ide_port_scan(ide_hwif_t *hwif) 1616{ 1617 ide_port_apply_params(hwif); 1618 ide_port_cable_detect(hwif); 1619 ide_port_init_devices(hwif); 1620 1621 if (ide_probe_port(hwif) < 0) 1622 return; 1623 1624 hwif->present = 1; 1625 1626 ide_port_tune_devices(hwif); 1627 ide_acpi_port_init_devices(hwif); 1628 ide_port_setup_devices(hwif); 1629 hwif_register_devices(hwif); 1630 ide_proc_port_register_devices(hwif); 1631} 1632EXPORT_SYMBOL_GPL(ide_port_scan); 1633 1634static void ide_legacy_init_one(u8 *idx, hw_regs_t *hw, u8 port_no, 1635 const struct ide_port_info *d, 1636 unsigned long config) 1637{ 1638 ide_hwif_t *hwif; 1639 unsigned long base, ctl; 1640 int irq; 1641 1642 if (port_no == 0) { 1643 base = 0x1f0; 1644 ctl = 0x3f6; 1645 irq = 14; 1646 } else { 1647 base = 0x170; 1648 ctl = 0x376; 1649 irq = 15; 1650 } 1651 1652 if (!request_region(base, 8, d->name)) { 1653 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n", 1654 d->name, base, base + 7); 1655 return; 1656 } 1657 1658 if (!request_region(ctl, 1, d->name)) { 1659 printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n", 1660 d->name, ctl); 1661 release_region(base, 8); 1662 return; 1663 } 1664 1665 ide_std_init_ports(hw, base, ctl); 1666 hw->irq = irq; 1667 1668 hwif = ide_find_port_slot(d); 1669 if (hwif) { 1670 ide_init_port_hw(hwif, hw); 1671 if (config) 1672 hwif->config_data = config; 1673 idx[port_no] = hwif->index; 1674 } 1675} 1676 1677int ide_legacy_device_add(const struct ide_port_info *d, unsigned long config) 1678{ 1679 u8 idx[4] = { 0xff, 0xff, 0xff, 0xff }; 1680 hw_regs_t hw[2]; 1681 1682 memset(&hw, 0, sizeof(hw)); 1683 1684 if ((d->host_flags & IDE_HFLAG_QD_2ND_PORT) == 0) 1685 ide_legacy_init_one(idx, &hw[0], 0, d, config); 1686 ide_legacy_init_one(idx, &hw[1], 1, d, config); 1687 1688 if (idx[0] == 0xff && idx[1] == 0xff && 1689 (d->host_flags & IDE_HFLAG_SINGLE)) 1690 return -ENOENT; 1691 1692 ide_device_add(idx, d); 1693 1694 return 0; 1695} 1696EXPORT_SYMBOL_GPL(ide_legacy_device_add); 1697