ide-probe.c revision 18de10170df31d34b342612f1c896a16a52f0a5c
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->tp_ops->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 const struct ide_tp_ops *tp_ops = hwif->tp_ops; 269 int use_altstatus = 0, rc; 270 unsigned long timeout; 271 u8 s = 0, a = 0; 272 273 /* take a deep breath */ 274 msleep(50); 275 276 if (io_ports->ctl_addr) { 277 a = tp_ops->read_altstatus(hwif); 278 s = tp_ops->read_status(hwif); 279 if ((a ^ s) & ~INDEX_STAT) 280 /* ancient Seagate drives, broken interfaces */ 281 printk(KERN_INFO "%s: probing with STATUS(0x%02x) " 282 "instead of ALTSTATUS(0x%02x)\n", 283 drive->name, s, a); 284 else 285 /* use non-intrusive polling */ 286 use_altstatus = 1; 287 } 288 289 /* set features register for atapi 290 * identify command to be sure of reply 291 */ 292 if (cmd == WIN_PIDENTIFY) { 293 ide_task_t task; 294 295 memset(&task, 0, sizeof(task)); 296 /* disable DMA & overlap */ 297 task.tf_flags = IDE_TFLAG_OUT_FEATURE; 298 299 tp_ops->tf_load(drive, &task); 300 } 301 302 /* ask drive for ID */ 303 tp_ops->exec_command(hwif, cmd); 304 305 timeout = ((cmd == WIN_IDENTIFY) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2; 306 timeout += jiffies; 307 do { 308 if (time_after(jiffies, timeout)) { 309 /* drive timed-out */ 310 return 1; 311 } 312 /* give drive a breather */ 313 msleep(50); 314 s = use_altstatus ? tp_ops->read_altstatus(hwif) 315 : tp_ops->read_status(hwif); 316 } while (s & BUSY_STAT); 317 318 /* wait for IRQ and DRQ_STAT */ 319 msleep(50); 320 s = tp_ops->read_status(hwif); 321 322 if (OK_STAT(s, DRQ_STAT, BAD_R_STAT)) { 323 unsigned long flags; 324 325 /* local CPU only; some systems need this */ 326 local_irq_save(flags); 327 /* drive returned ID */ 328 do_identify(drive, cmd); 329 /* drive responded with ID */ 330 rc = 0; 331 /* clear drive IRQ */ 332 (void)tp_ops->read_status(hwif); 333 local_irq_restore(flags); 334 } else { 335 /* drive refused ID */ 336 rc = 2; 337 } 338 return rc; 339} 340 341/** 342 * try_to_identify - try to identify a drive 343 * @drive: drive to probe 344 * @cmd: command to use 345 * 346 * Issue the identify command and then do IRQ probing to 347 * complete the identification when needed by finding the 348 * IRQ the drive is attached to 349 */ 350 351static int try_to_identify (ide_drive_t *drive, u8 cmd) 352{ 353 ide_hwif_t *hwif = HWIF(drive); 354 const struct ide_tp_ops *tp_ops = hwif->tp_ops; 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 tp_ops->set_irq(hwif, autoprobe); 371 } 372 373 retval = actual_try_to_identify(drive, cmd); 374 375 if (autoprobe) { 376 int irq; 377 378 tp_ops->set_irq(hwif, 0); 379 /* clear drive IRQ */ 380 (void)tp_ops->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->tp_ops->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->tp_ops->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 const struct ide_tp_ops *tp_ops = hwif->tp_ops; 450 int rc; 451 u8 stat; 452 453 if (drive->present) { 454 /* avoid waiting for inappropriate probes */ 455 if ((drive->media != ide_disk) && (cmd == WIN_IDENTIFY)) 456 return 4; 457 } 458#ifdef DEBUG 459 printk("probing for %s: present=%d, media=%d, probetype=%s\n", 460 drive->name, drive->present, drive->media, 461 (cmd == WIN_IDENTIFY) ? "ATA" : "ATAPI"); 462#endif 463 464 /* needed for some systems 465 * (e.g. crw9624 as drive0 with disk as slave) 466 */ 467 msleep(50); 468 SELECT_DRIVE(drive); 469 msleep(50); 470 471 if (ide_read_device(drive) != drive->select.all && !drive->present) { 472 if (drive->select.b.unit != 0) { 473 /* exit with drive0 selected */ 474 SELECT_DRIVE(&hwif->drives[0]); 475 /* allow BUSY_STAT to assert & clear */ 476 msleep(50); 477 } 478 /* no i/f present: mmm.. this should be a 4 -ml */ 479 return 3; 480 } 481 482 stat = tp_ops->read_status(hwif); 483 484 if (OK_STAT(stat, READY_STAT, BUSY_STAT) || 485 drive->present || cmd == WIN_PIDENTIFY) { 486 /* send cmd and wait */ 487 if ((rc = try_to_identify(drive, cmd))) { 488 /* failed: try again */ 489 rc = try_to_identify(drive,cmd); 490 } 491 492 stat = tp_ops->read_status(hwif); 493 494 if (stat == (BUSY_STAT | READY_STAT)) 495 return 4; 496 497 if (rc == 1 && cmd == WIN_PIDENTIFY) { 498 printk(KERN_ERR "%s: no response (status = 0x%02x), " 499 "resetting drive\n", drive->name, stat); 500 msleep(50); 501 SELECT_DRIVE(drive); 502 msleep(50); 503 tp_ops->exec_command(hwif, WIN_SRST); 504 (void)ide_busy_sleep(hwif); 505 rc = try_to_identify(drive, cmd); 506 } 507 508 /* ensure drive IRQ is clear */ 509 stat = tp_ops->read_status(hwif); 510 511 if (rc == 1) 512 printk(KERN_ERR "%s: no response (status = 0x%02x)\n", 513 drive->name, stat); 514 } else { 515 /* not present or maybe ATAPI */ 516 rc = 3; 517 } 518 if (drive->select.b.unit != 0) { 519 /* exit with drive0 selected */ 520 SELECT_DRIVE(&hwif->drives[0]); 521 msleep(50); 522 /* ensure drive irq is clear */ 523 (void)tp_ops->read_status(hwif); 524 } 525 return rc; 526} 527 528/* 529 * 530 */ 531static void enable_nest (ide_drive_t *drive) 532{ 533 ide_hwif_t *hwif = HWIF(drive); 534 const struct ide_tp_ops *tp_ops = hwif->tp_ops; 535 u8 stat; 536 537 printk("%s: enabling %s -- ", hwif->name, drive->id->model); 538 SELECT_DRIVE(drive); 539 msleep(50); 540 tp_ops->exec_command(hwif, EXABYTE_ENABLE_NEST); 541 542 if (ide_busy_sleep(hwif)) { 543 printk(KERN_CONT "failed (timeout)\n"); 544 return; 545 } 546 547 msleep(50); 548 549 stat = tp_ops->read_status(hwif); 550 551 if (!OK_STAT(stat, 0, BAD_STAT)) 552 printk(KERN_CONT "failed (status = 0x%02x)\n", stat); 553 else 554 printk(KERN_CONT "success\n"); 555 556 /* if !(success||timed-out) */ 557 if (do_probe(drive, WIN_IDENTIFY) >= 2) { 558 /* look for ATAPI device */ 559 (void) do_probe(drive, WIN_PIDENTIFY); 560 } 561} 562 563/** 564 * probe_for_drives - upper level drive probe 565 * @drive: drive to probe for 566 * 567 * probe_for_drive() tests for existence of a given drive using do_probe() 568 * and presents things to the user as needed. 569 * 570 * Returns: 0 no device was found 571 * 1 device was found (note: drive->present might 572 * still be 0) 573 */ 574 575static inline u8 probe_for_drive (ide_drive_t *drive) 576{ 577 /* 578 * In order to keep things simple we have an id 579 * block for all drives at all times. If the device 580 * is pre ATA or refuses ATA/ATAPI identify we 581 * will add faked data to this. 582 * 583 * Also note that 0 everywhere means "can't do X" 584 */ 585 586 drive->id = kzalloc(SECTOR_WORDS *4, GFP_KERNEL); 587 drive->id_read = 0; 588 if(drive->id == NULL) 589 { 590 printk(KERN_ERR "ide: out of memory for id data.\n"); 591 return 0; 592 } 593 strcpy(drive->id->model, "UNKNOWN"); 594 595 /* skip probing? */ 596 if (!drive->noprobe) 597 { 598 /* if !(success||timed-out) */ 599 if (do_probe(drive, WIN_IDENTIFY) >= 2) { 600 /* look for ATAPI device */ 601 (void) do_probe(drive, WIN_PIDENTIFY); 602 } 603 if (!drive->present) 604 /* drive not found */ 605 return 0; 606 if (strstr(drive->id->model, "E X A B Y T E N E S T")) 607 enable_nest(drive); 608 609 /* identification failed? */ 610 if (!drive->id_read) { 611 if (drive->media == ide_disk) { 612 printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n", 613 drive->name, drive->cyl, 614 drive->head, drive->sect); 615 } else if (drive->media == ide_cdrom) { 616 printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name); 617 } else { 618 /* nuke it */ 619 printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name); 620 drive->present = 0; 621 } 622 } 623 /* drive was found */ 624 } 625 if(!drive->present) 626 return 0; 627 /* The drive wasn't being helpful. Add generic info only */ 628 if (drive->id_read == 0) { 629 generic_id(drive); 630 return 1; 631 } 632 633 if (drive->media == ide_disk) { 634 ide_disk_init_chs(drive); 635 ide_disk_init_mult_count(drive); 636 } 637 638 return drive->present; 639} 640 641static void hwif_release_dev (struct device *dev) 642{ 643 ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev); 644 645 complete(&hwif->gendev_rel_comp); 646} 647 648static int ide_register_port(ide_hwif_t *hwif) 649{ 650 int ret; 651 652 /* register with global device tree */ 653 strlcpy(hwif->gendev.bus_id,hwif->name,BUS_ID_SIZE); 654 hwif->gendev.driver_data = hwif; 655 if (hwif->gendev.parent == NULL) { 656 if (hwif->dev) 657 hwif->gendev.parent = hwif->dev; 658 else 659 /* Would like to do = &device_legacy */ 660 hwif->gendev.parent = NULL; 661 } 662 hwif->gendev.release = hwif_release_dev; 663 ret = device_register(&hwif->gendev); 664 if (ret < 0) { 665 printk(KERN_WARNING "IDE: %s: device_register error: %d\n", 666 __func__, ret); 667 goto out; 668 } 669 670 hwif->portdev = device_create_drvdata(ide_port_class, &hwif->gendev, 671 MKDEV(0, 0), hwif, hwif->name); 672 if (IS_ERR(hwif->portdev)) { 673 ret = PTR_ERR(hwif->portdev); 674 device_unregister(&hwif->gendev); 675 } 676out: 677 return ret; 678} 679 680/** 681 * ide_port_wait_ready - wait for port to become ready 682 * @hwif: IDE port 683 * 684 * This is needed on some PPCs and a bunch of BIOS-less embedded 685 * platforms. Typical cases are: 686 * 687 * - The firmware hard reset the disk before booting the kernel, 688 * the drive is still doing it's poweron-reset sequence, that 689 * can take up to 30 seconds. 690 * 691 * - The firmware does nothing (or no firmware), the device is 692 * still in POST state (same as above actually). 693 * 694 * - Some CD/DVD/Writer combo drives tend to drive the bus during 695 * their reset sequence even when they are non-selected slave 696 * devices, thus preventing discovery of the main HD. 697 * 698 * Doing this wait-for-non-busy should not harm any existing 699 * configuration and fix some issues like the above. 700 * 701 * BenH. 702 * 703 * Returns 0 on success, error code (< 0) otherwise. 704 */ 705 706static int ide_port_wait_ready(ide_hwif_t *hwif) 707{ 708 int unit, rc; 709 710 printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name); 711 712 /* Let HW settle down a bit from whatever init state we 713 * come from */ 714 mdelay(2); 715 716 /* Wait for BSY bit to go away, spec timeout is 30 seconds, 717 * I know of at least one disk who takes 31 seconds, I use 35 718 * here to be safe 719 */ 720 rc = ide_wait_not_busy(hwif, 35000); 721 if (rc) 722 return rc; 723 724 /* Now make sure both master & slave are ready */ 725 for (unit = 0; unit < MAX_DRIVES; unit++) { 726 ide_drive_t *drive = &hwif->drives[unit]; 727 728 /* Ignore disks that we will not probe for later. */ 729 if (!drive->noprobe || drive->present) { 730 SELECT_DRIVE(drive); 731 hwif->tp_ops->set_irq(hwif, 1); 732 mdelay(2); 733 rc = ide_wait_not_busy(hwif, 35000); 734 if (rc) 735 goto out; 736 } else 737 printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n", 738 drive->name); 739 } 740out: 741 /* Exit function with master reselected (let's be sane) */ 742 if (unit) 743 SELECT_DRIVE(&hwif->drives[0]); 744 745 return rc; 746} 747 748/** 749 * ide_undecoded_slave - look for bad CF adapters 750 * @drive1: drive 751 * 752 * Analyse the drives on the interface and attempt to decide if we 753 * have the same drive viewed twice. This occurs with crap CF adapters 754 * and PCMCIA sometimes. 755 */ 756 757void ide_undecoded_slave(ide_drive_t *drive1) 758{ 759 ide_drive_t *drive0 = &drive1->hwif->drives[0]; 760 761 if ((drive1->dn & 1) == 0 || drive0->present == 0) 762 return; 763 764 /* If the models don't match they are not the same product */ 765 if (strcmp(drive0->id->model, drive1->id->model)) 766 return; 767 768 /* Serial numbers do not match */ 769 if (strncmp(drive0->id->serial_no, drive1->id->serial_no, 20)) 770 return; 771 772 /* No serial number, thankfully very rare for CF */ 773 if (drive0->id->serial_no[0] == 0) 774 return; 775 776 /* Appears to be an IDE flash adapter with decode bugs */ 777 printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n"); 778 779 drive1->present = 0; 780} 781 782EXPORT_SYMBOL_GPL(ide_undecoded_slave); 783 784static int ide_probe_port(ide_hwif_t *hwif) 785{ 786 unsigned long flags; 787 unsigned int irqd; 788 int unit, rc = -ENODEV; 789 790 BUG_ON(hwif->present); 791 792 if (hwif->drives[0].noprobe && hwif->drives[1].noprobe) 793 return -EACCES; 794 795 /* 796 * We must always disable IRQ, as probe_for_drive will assert IRQ, but 797 * we'll install our IRQ driver much later... 798 */ 799 irqd = hwif->irq; 800 if (irqd) 801 disable_irq(hwif->irq); 802 803 local_irq_set(flags); 804 805 if (ide_port_wait_ready(hwif) == -EBUSY) 806 printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name); 807 808 /* 809 * Second drive should only exist if first drive was found, 810 * but a lot of cdrom drives are configured as single slaves. 811 */ 812 for (unit = 0; unit < MAX_DRIVES; ++unit) { 813 ide_drive_t *drive = &hwif->drives[unit]; 814 drive->dn = (hwif->channel ? 2 : 0) + unit; 815 (void) probe_for_drive(drive); 816 if (drive->present) 817 rc = 0; 818 } 819 820 local_irq_restore(flags); 821 822 /* 823 * Use cached IRQ number. It might be (and is...) changed by probe 824 * code above 825 */ 826 if (irqd) 827 enable_irq(irqd); 828 829 return rc; 830} 831 832static void ide_port_tune_devices(ide_hwif_t *hwif) 833{ 834 const struct ide_port_ops *port_ops = hwif->port_ops; 835 int unit; 836 837 for (unit = 0; unit < MAX_DRIVES; unit++) { 838 ide_drive_t *drive = &hwif->drives[unit]; 839 840 if (drive->present && port_ops && port_ops->quirkproc) 841 port_ops->quirkproc(drive); 842 } 843 844 for (unit = 0; unit < MAX_DRIVES; ++unit) { 845 ide_drive_t *drive = &hwif->drives[unit]; 846 847 if (drive->present) { 848 ide_set_max_pio(drive); 849 850 drive->nice1 = 1; 851 852 if (hwif->dma_ops) 853 ide_set_dma(drive); 854 } 855 } 856 857 for (unit = 0; unit < MAX_DRIVES; ++unit) { 858 ide_drive_t *drive = &hwif->drives[unit]; 859 860 if (hwif->host_flags & IDE_HFLAG_NO_IO_32BIT) 861 drive->no_io_32bit = 1; 862 else 863 drive->no_io_32bit = drive->id->dword_io ? 1 : 0; 864 } 865} 866 867#if MAX_HWIFS > 1 868/* 869 * save_match() is used to simplify logic in init_irq() below. 870 * 871 * A loophole here is that we may not know about a particular 872 * hwif's irq until after that hwif is actually probed/initialized.. 873 * This could be a problem for the case where an hwif is on a 874 * dual interface that requires serialization (eg. cmd640) and another 875 * hwif using one of the same irqs is initialized beforehand. 876 * 877 * This routine detects and reports such situations, but does not fix them. 878 */ 879static void save_match(ide_hwif_t *hwif, ide_hwif_t *new, ide_hwif_t **match) 880{ 881 ide_hwif_t *m = *match; 882 883 if (m && m->hwgroup && m->hwgroup != new->hwgroup) { 884 if (!new->hwgroup) 885 return; 886 printk("%s: potential irq problem with %s and %s\n", 887 hwif->name, new->name, m->name); 888 } 889 if (!m || m->irq != hwif->irq) /* don't undo a prior perfect match */ 890 *match = new; 891} 892#endif /* MAX_HWIFS > 1 */ 893 894/* 895 * init request queue 896 */ 897static int ide_init_queue(ide_drive_t *drive) 898{ 899 struct request_queue *q; 900 ide_hwif_t *hwif = HWIF(drive); 901 int max_sectors = 256; 902 int max_sg_entries = PRD_ENTRIES; 903 904 /* 905 * Our default set up assumes the normal IDE case, 906 * that is 64K segmenting, standard PRD setup 907 * and LBA28. Some drivers then impose their own 908 * limits and LBA48 we could raise it but as yet 909 * do not. 910 */ 911 912 q = blk_init_queue_node(do_ide_request, &ide_lock, hwif_to_node(hwif)); 913 if (!q) 914 return 1; 915 916 q->queuedata = drive; 917 blk_queue_segment_boundary(q, 0xffff); 918 919 if (hwif->rqsize < max_sectors) 920 max_sectors = hwif->rqsize; 921 blk_queue_max_sectors(q, max_sectors); 922 923#ifdef CONFIG_PCI 924 /* When we have an IOMMU, we may have a problem where pci_map_sg() 925 * creates segments that don't completely match our boundary 926 * requirements and thus need to be broken up again. Because it 927 * doesn't align properly either, we may actually have to break up 928 * to more segments than what was we got in the first place, a max 929 * worst case is twice as many. 930 * This will be fixed once we teach pci_map_sg() about our boundary 931 * requirements, hopefully soon. *FIXME* 932 */ 933 if (!PCI_DMA_BUS_IS_PHYS) 934 max_sg_entries >>= 1; 935#endif /* CONFIG_PCI */ 936 937 blk_queue_max_hw_segments(q, max_sg_entries); 938 blk_queue_max_phys_segments(q, max_sg_entries); 939 940 /* assign drive queue */ 941 drive->queue = q; 942 943 /* needs drive->queue to be set */ 944 ide_toggle_bounce(drive, 1); 945 946 return 0; 947} 948 949static void ide_add_drive_to_hwgroup(ide_drive_t *drive) 950{ 951 ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; 952 953 spin_lock_irq(&ide_lock); 954 if (!hwgroup->drive) { 955 /* first drive for hwgroup. */ 956 drive->next = drive; 957 hwgroup->drive = drive; 958 hwgroup->hwif = HWIF(hwgroup->drive); 959 } else { 960 drive->next = hwgroup->drive->next; 961 hwgroup->drive->next = drive; 962 } 963 spin_unlock_irq(&ide_lock); 964} 965 966/* 967 * For any present drive: 968 * - allocate the block device queue 969 * - link drive into the hwgroup 970 */ 971static void ide_port_setup_devices(ide_hwif_t *hwif) 972{ 973 int i; 974 975 mutex_lock(&ide_cfg_mtx); 976 for (i = 0; i < MAX_DRIVES; i++) { 977 ide_drive_t *drive = &hwif->drives[i]; 978 979 if (!drive->present) 980 continue; 981 982 if (ide_init_queue(drive)) { 983 printk(KERN_ERR "ide: failed to init %s\n", 984 drive->name); 985 continue; 986 } 987 988 ide_add_drive_to_hwgroup(drive); 989 } 990 mutex_unlock(&ide_cfg_mtx); 991} 992 993static ide_hwif_t *ide_ports[MAX_HWIFS]; 994 995void ide_remove_port_from_hwgroup(ide_hwif_t *hwif) 996{ 997 ide_hwgroup_t *hwgroup = hwif->hwgroup; 998 999 ide_ports[hwif->index] = NULL; 1000 1001 spin_lock_irq(&ide_lock); 1002 /* 1003 * Remove us from the hwgroup, and free 1004 * the hwgroup if we were the only member 1005 */ 1006 if (hwif->next == hwif) { 1007 BUG_ON(hwgroup->hwif != hwif); 1008 kfree(hwgroup); 1009 } else { 1010 /* There is another interface in hwgroup. 1011 * Unlink us, and set hwgroup->drive and ->hwif to 1012 * something sane. 1013 */ 1014 ide_hwif_t *g = hwgroup->hwif; 1015 1016 while (g->next != hwif) 1017 g = g->next; 1018 g->next = hwif->next; 1019 if (hwgroup->hwif == hwif) { 1020 /* Chose a random hwif for hwgroup->hwif. 1021 * It's guaranteed that there are no drives 1022 * left in the hwgroup. 1023 */ 1024 BUG_ON(hwgroup->drive != NULL); 1025 hwgroup->hwif = g; 1026 } 1027 BUG_ON(hwgroup->hwif == hwif); 1028 } 1029 spin_unlock_irq(&ide_lock); 1030} 1031 1032/* 1033 * This routine sets up the irq for an ide interface, and creates a new 1034 * hwgroup for the irq/hwif if none was previously assigned. 1035 * 1036 * Much of the code is for correctly detecting/handling irq sharing 1037 * and irq serialization situations. This is somewhat complex because 1038 * it handles static as well as dynamic (PCMCIA) IDE interfaces. 1039 */ 1040static int init_irq (ide_hwif_t *hwif) 1041{ 1042 struct ide_io_ports *io_ports = &hwif->io_ports; 1043 unsigned int index; 1044 ide_hwgroup_t *hwgroup; 1045 ide_hwif_t *match = NULL; 1046 1047 1048 BUG_ON(in_interrupt()); 1049 BUG_ON(irqs_disabled()); 1050 BUG_ON(hwif == NULL); 1051 1052 mutex_lock(&ide_cfg_mtx); 1053 hwif->hwgroup = NULL; 1054#if MAX_HWIFS > 1 1055 /* 1056 * Group up with any other hwifs that share our irq(s). 1057 */ 1058 for (index = 0; index < MAX_HWIFS; index++) { 1059 ide_hwif_t *h = ide_ports[index]; 1060 1061 if (h && h->hwgroup) { /* scan only initialized ports */ 1062 if (hwif->irq == h->irq) { 1063 hwif->sharing_irq = h->sharing_irq = 1; 1064 if (hwif->chipset != ide_pci || 1065 h->chipset != ide_pci) { 1066 save_match(hwif, h, &match); 1067 } 1068 } 1069 if (hwif->serialized) { 1070 if (hwif->mate && hwif->mate->irq == h->irq) 1071 save_match(hwif, h, &match); 1072 } 1073 if (h->serialized) { 1074 if (h->mate && hwif->irq == h->mate->irq) 1075 save_match(hwif, h, &match); 1076 } 1077 } 1078 } 1079#endif /* MAX_HWIFS > 1 */ 1080 /* 1081 * If we are still without a hwgroup, then form a new one 1082 */ 1083 if (match) { 1084 hwgroup = match->hwgroup; 1085 hwif->hwgroup = hwgroup; 1086 /* 1087 * Link us into the hwgroup. 1088 * This must be done early, do ensure that unexpected_intr 1089 * can find the hwif and prevent irq storms. 1090 * No drives are attached to the new hwif, choose_drive 1091 * can't do anything stupid (yet). 1092 * Add ourself as the 2nd entry to the hwgroup->hwif 1093 * linked list, the first entry is the hwif that owns 1094 * hwgroup->handler - do not change that. 1095 */ 1096 spin_lock_irq(&ide_lock); 1097 hwif->next = hwgroup->hwif->next; 1098 hwgroup->hwif->next = hwif; 1099 BUG_ON(hwif->next == hwif); 1100 spin_unlock_irq(&ide_lock); 1101 } else { 1102 hwgroup = kmalloc_node(sizeof(*hwgroup), GFP_KERNEL|__GFP_ZERO, 1103 hwif_to_node(hwif)); 1104 if (hwgroup == NULL) 1105 goto out_up; 1106 1107 hwif->hwgroup = hwgroup; 1108 hwgroup->hwif = hwif->next = hwif; 1109 1110 init_timer(&hwgroup->timer); 1111 hwgroup->timer.function = &ide_timer_expiry; 1112 hwgroup->timer.data = (unsigned long) hwgroup; 1113 } 1114 1115 ide_ports[hwif->index] = hwif; 1116 1117 /* 1118 * Allocate the irq, if not already obtained for another hwif 1119 */ 1120 if (!match || match->irq != hwif->irq) { 1121 int sa = 0; 1122#if defined(__mc68000__) 1123 sa = IRQF_SHARED; 1124#endif /* __mc68000__ */ 1125 1126 if (IDE_CHIPSET_IS_PCI(hwif->chipset)) 1127 sa = IRQF_SHARED; 1128 1129 if (io_ports->ctl_addr) 1130 hwif->tp_ops->set_irq(hwif, 1); 1131 1132 if (request_irq(hwif->irq,&ide_intr,sa,hwif->name,hwgroup)) 1133 goto out_unlink; 1134 } 1135 1136 if (!hwif->rqsize) { 1137 if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) || 1138 (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA)) 1139 hwif->rqsize = 256; 1140 else 1141 hwif->rqsize = 65536; 1142 } 1143 1144#if !defined(__mc68000__) 1145 printk("%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name, 1146 io_ports->data_addr, io_ports->status_addr, 1147 io_ports->ctl_addr, hwif->irq); 1148#else 1149 printk("%s at 0x%08lx on irq %d", hwif->name, 1150 io_ports->data_addr, hwif->irq); 1151#endif /* __mc68000__ */ 1152 if (match) 1153 printk(" (%sed with %s)", 1154 hwif->sharing_irq ? "shar" : "serializ", match->name); 1155 printk("\n"); 1156 1157 mutex_unlock(&ide_cfg_mtx); 1158 return 0; 1159out_unlink: 1160 ide_remove_port_from_hwgroup(hwif); 1161out_up: 1162 mutex_unlock(&ide_cfg_mtx); 1163 return 1; 1164} 1165 1166static int ata_lock(dev_t dev, void *data) 1167{ 1168 /* FIXME: we want to pin hwif down */ 1169 return 0; 1170} 1171 1172static struct kobject *ata_probe(dev_t dev, int *part, void *data) 1173{ 1174 ide_hwif_t *hwif = data; 1175 int unit = *part >> PARTN_BITS; 1176 ide_drive_t *drive = &hwif->drives[unit]; 1177 if (!drive->present) 1178 return NULL; 1179 1180 if (drive->media == ide_disk) 1181 request_module("ide-disk"); 1182 if (drive->scsi) 1183 request_module("ide-scsi"); 1184 if (drive->media == ide_cdrom || drive->media == ide_optical) 1185 request_module("ide-cd"); 1186 if (drive->media == ide_tape) 1187 request_module("ide-tape"); 1188 if (drive->media == ide_floppy) 1189 request_module("ide-floppy"); 1190 1191 return NULL; 1192} 1193 1194static struct kobject *exact_match(dev_t dev, int *part, void *data) 1195{ 1196 struct gendisk *p = data; 1197 *part &= (1 << PARTN_BITS) - 1; 1198 return &p->dev.kobj; 1199} 1200 1201static int exact_lock(dev_t dev, void *data) 1202{ 1203 struct gendisk *p = data; 1204 1205 if (!get_disk(p)) 1206 return -1; 1207 return 0; 1208} 1209 1210void ide_register_region(struct gendisk *disk) 1211{ 1212 blk_register_region(MKDEV(disk->major, disk->first_minor), 1213 disk->minors, NULL, exact_match, exact_lock, disk); 1214} 1215 1216EXPORT_SYMBOL_GPL(ide_register_region); 1217 1218void ide_unregister_region(struct gendisk *disk) 1219{ 1220 blk_unregister_region(MKDEV(disk->major, disk->first_minor), 1221 disk->minors); 1222} 1223 1224EXPORT_SYMBOL_GPL(ide_unregister_region); 1225 1226void ide_init_disk(struct gendisk *disk, ide_drive_t *drive) 1227{ 1228 ide_hwif_t *hwif = drive->hwif; 1229 unsigned int unit = (drive->select.all >> 4) & 1; 1230 1231 disk->major = hwif->major; 1232 disk->first_minor = unit << PARTN_BITS; 1233 sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit); 1234 disk->queue = drive->queue; 1235} 1236 1237EXPORT_SYMBOL_GPL(ide_init_disk); 1238 1239static void ide_remove_drive_from_hwgroup(ide_drive_t *drive) 1240{ 1241 ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; 1242 1243 if (drive == drive->next) { 1244 /* special case: last drive from hwgroup. */ 1245 BUG_ON(hwgroup->drive != drive); 1246 hwgroup->drive = NULL; 1247 } else { 1248 ide_drive_t *walk; 1249 1250 walk = hwgroup->drive; 1251 while (walk->next != drive) 1252 walk = walk->next; 1253 walk->next = drive->next; 1254 if (hwgroup->drive == drive) { 1255 hwgroup->drive = drive->next; 1256 hwgroup->hwif = hwgroup->drive->hwif; 1257 } 1258 } 1259 BUG_ON(hwgroup->drive == drive); 1260} 1261 1262static void drive_release_dev (struct device *dev) 1263{ 1264 ide_drive_t *drive = container_of(dev, ide_drive_t, gendev); 1265 1266 ide_proc_unregister_device(drive); 1267 1268 spin_lock_irq(&ide_lock); 1269 ide_remove_drive_from_hwgroup(drive); 1270 kfree(drive->id); 1271 drive->id = NULL; 1272 drive->present = 0; 1273 /* Messed up locking ... */ 1274 spin_unlock_irq(&ide_lock); 1275 blk_cleanup_queue(drive->queue); 1276 spin_lock_irq(&ide_lock); 1277 drive->queue = NULL; 1278 spin_unlock_irq(&ide_lock); 1279 1280 complete(&drive->gendev_rel_comp); 1281} 1282 1283static int hwif_init(ide_hwif_t *hwif) 1284{ 1285 int old_irq; 1286 1287 if (!hwif->irq) { 1288 hwif->irq = __ide_default_irq(hwif->io_ports.data_addr); 1289 if (!hwif->irq) { 1290 printk("%s: DISABLED, NO IRQ\n", hwif->name); 1291 return 0; 1292 } 1293 } 1294 1295 if (register_blkdev(hwif->major, hwif->name)) 1296 return 0; 1297 1298 if (!hwif->sg_max_nents) 1299 hwif->sg_max_nents = PRD_ENTRIES; 1300 1301 hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents, 1302 GFP_KERNEL); 1303 if (!hwif->sg_table) { 1304 printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name); 1305 goto out; 1306 } 1307 1308 sg_init_table(hwif->sg_table, hwif->sg_max_nents); 1309 1310 if (init_irq(hwif) == 0) 1311 goto done; 1312 1313 old_irq = hwif->irq; 1314 /* 1315 * It failed to initialise. Find the default IRQ for 1316 * this port and try that. 1317 */ 1318 hwif->irq = __ide_default_irq(hwif->io_ports.data_addr); 1319 if (!hwif->irq) { 1320 printk("%s: Disabled unable to get IRQ %d.\n", 1321 hwif->name, old_irq); 1322 goto out; 1323 } 1324 if (init_irq(hwif)) { 1325 printk("%s: probed IRQ %d and default IRQ %d failed.\n", 1326 hwif->name, old_irq, hwif->irq); 1327 goto out; 1328 } 1329 printk("%s: probed IRQ %d failed, using default.\n", 1330 hwif->name, hwif->irq); 1331 1332done: 1333 blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS, 1334 THIS_MODULE, ata_probe, ata_lock, hwif); 1335 return 1; 1336 1337out: 1338 unregister_blkdev(hwif->major, hwif->name); 1339 return 0; 1340} 1341 1342static void hwif_register_devices(ide_hwif_t *hwif) 1343{ 1344 unsigned int i; 1345 1346 for (i = 0; i < MAX_DRIVES; i++) { 1347 ide_drive_t *drive = &hwif->drives[i]; 1348 struct device *dev = &drive->gendev; 1349 int ret; 1350 1351 if (!drive->present) 1352 continue; 1353 1354 ide_add_generic_settings(drive); 1355 1356 snprintf(dev->bus_id, BUS_ID_SIZE, "%u.%u", hwif->index, i); 1357 dev->parent = &hwif->gendev; 1358 dev->bus = &ide_bus_type; 1359 dev->driver_data = drive; 1360 dev->release = drive_release_dev; 1361 1362 ret = device_register(dev); 1363 if (ret < 0) 1364 printk(KERN_WARNING "IDE: %s: device_register error: " 1365 "%d\n", __func__, ret); 1366 } 1367} 1368 1369static void ide_port_init_devices(ide_hwif_t *hwif) 1370{ 1371 const struct ide_port_ops *port_ops = hwif->port_ops; 1372 int i; 1373 1374 for (i = 0; i < MAX_DRIVES; i++) { 1375 ide_drive_t *drive = &hwif->drives[i]; 1376 1377 if (hwif->host_flags & IDE_HFLAG_IO_32BIT) 1378 drive->io_32bit = 1; 1379 if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS) 1380 drive->unmask = 1; 1381 if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS) 1382 drive->no_unmask = 1; 1383 1384 if (port_ops && port_ops->init_dev) 1385 port_ops->init_dev(drive); 1386 } 1387} 1388 1389static void ide_init_port(ide_hwif_t *hwif, unsigned int port, 1390 const struct ide_port_info *d) 1391{ 1392 hwif->channel = port; 1393 1394 if (d->chipset) 1395 hwif->chipset = d->chipset; 1396 1397 if (d->init_iops) 1398 d->init_iops(hwif); 1399 1400 if ((!hwif->irq && (d->host_flags & IDE_HFLAG_LEGACY_IRQS)) || 1401 (d->host_flags & IDE_HFLAG_FORCE_LEGACY_IRQS)) 1402 hwif->irq = port ? 15 : 14; 1403 1404 /* ->host_flags may be set by ->init_iops (or even earlier...) */ 1405 hwif->host_flags |= d->host_flags; 1406 hwif->pio_mask = d->pio_mask; 1407 1408 if (d->tp_ops) 1409 hwif->tp_ops = d->tp_ops; 1410 1411 /* ->set_pio_mode for DTC2278 is currently limited to port 0 */ 1412 if (hwif->chipset != ide_dtc2278 || hwif->channel == 0) 1413 hwif->port_ops = d->port_ops; 1414 1415 hwif->swdma_mask = d->swdma_mask; 1416 hwif->mwdma_mask = d->mwdma_mask; 1417 hwif->ultra_mask = d->udma_mask; 1418 1419 if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) { 1420 int rc; 1421 1422 if (d->init_dma) 1423 rc = d->init_dma(hwif, d); 1424 else 1425 rc = ide_hwif_setup_dma(hwif, d); 1426 1427 if (rc < 0) { 1428 printk(KERN_INFO "%s: DMA disabled\n", hwif->name); 1429 hwif->dma_base = 0; 1430 hwif->swdma_mask = 0; 1431 hwif->mwdma_mask = 0; 1432 hwif->ultra_mask = 0; 1433 } else if (d->dma_ops) 1434 hwif->dma_ops = d->dma_ops; 1435 } 1436 1437 if ((d->host_flags & IDE_HFLAG_SERIALIZE) || 1438 ((d->host_flags & IDE_HFLAG_SERIALIZE_DMA) && hwif->dma_base)) { 1439 if (hwif->mate) 1440 hwif->mate->serialized = hwif->serialized = 1; 1441 } 1442 1443 if (d->host_flags & IDE_HFLAG_RQSIZE_256) 1444 hwif->rqsize = 256; 1445 1446 /* call chipset specific routine for each enabled port */ 1447 if (d->init_hwif) 1448 d->init_hwif(hwif); 1449} 1450 1451static void ide_port_cable_detect(ide_hwif_t *hwif) 1452{ 1453 const struct ide_port_ops *port_ops = hwif->port_ops; 1454 1455 if (port_ops && port_ops->cable_detect && (hwif->ultra_mask & 0x78)) { 1456 if (hwif->cbl != ATA_CBL_PATA40_SHORT) 1457 hwif->cbl = port_ops->cable_detect(hwif); 1458 } 1459} 1460 1461static ssize_t store_delete_devices(struct device *portdev, 1462 struct device_attribute *attr, 1463 const char *buf, size_t n) 1464{ 1465 ide_hwif_t *hwif = dev_get_drvdata(portdev); 1466 1467 if (strncmp(buf, "1", n)) 1468 return -EINVAL; 1469 1470 ide_port_unregister_devices(hwif); 1471 1472 return n; 1473}; 1474 1475static DEVICE_ATTR(delete_devices, S_IWUSR, NULL, store_delete_devices); 1476 1477static ssize_t store_scan(struct device *portdev, 1478 struct device_attribute *attr, 1479 const char *buf, size_t n) 1480{ 1481 ide_hwif_t *hwif = dev_get_drvdata(portdev); 1482 1483 if (strncmp(buf, "1", n)) 1484 return -EINVAL; 1485 1486 ide_port_unregister_devices(hwif); 1487 ide_port_scan(hwif); 1488 1489 return n; 1490}; 1491 1492static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan); 1493 1494static struct device_attribute *ide_port_attrs[] = { 1495 &dev_attr_delete_devices, 1496 &dev_attr_scan, 1497 NULL 1498}; 1499 1500static int ide_sysfs_register_port(ide_hwif_t *hwif) 1501{ 1502 int i, rc; 1503 1504 for (i = 0; ide_port_attrs[i]; i++) { 1505 rc = device_create_file(hwif->portdev, ide_port_attrs[i]); 1506 if (rc) 1507 break; 1508 } 1509 1510 return rc; 1511} 1512 1513static unsigned int ide_indexes; 1514 1515/** 1516 * ide_find_port_slot - find free port slot 1517 * @d: IDE port info 1518 * 1519 * Return the new port slot index or -ENOENT if we are out of free slots. 1520 */ 1521 1522static int ide_find_port_slot(const struct ide_port_info *d) 1523{ 1524 int idx = -ENOENT; 1525 u8 bootable = (d && (d->host_flags & IDE_HFLAG_NON_BOOTABLE)) ? 0 : 1; 1526 u8 i = (d && (d->host_flags & IDE_HFLAG_QD_2ND_PORT)) ? 1 : 0;; 1527 1528 /* 1529 * Claim an unassigned slot. 1530 * 1531 * Give preference to claiming other slots before claiming ide0/ide1, 1532 * just in case there's another interface yet-to-be-scanned 1533 * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults). 1534 * 1535 * Unless there is a bootable card that does not use the standard 1536 * ports 0x1f0/0x170 (the ide0/ide1 defaults). 1537 */ 1538 mutex_lock(&ide_cfg_mtx); 1539 if (MAX_HWIFS == 1) { 1540 if (ide_indexes == 0 && i == 0) 1541 idx = 1; 1542 } else { 1543 if (bootable) { 1544 if ((ide_indexes | i) != (1 << MAX_HWIFS) - 1) 1545 idx = ffz(ide_indexes | i); 1546 } else { 1547 if ((ide_indexes | 3) != (1 << MAX_HWIFS) - 1) 1548 idx = ffz(ide_indexes | 3); 1549 else if ((ide_indexes & 3) != 3) 1550 idx = ffz(ide_indexes); 1551 } 1552 } 1553 if (idx >= 0) 1554 ide_indexes |= (1 << idx); 1555 mutex_unlock(&ide_cfg_mtx); 1556 1557 return idx; 1558} 1559 1560static void ide_free_port_slot(int idx) 1561{ 1562 mutex_lock(&ide_cfg_mtx); 1563 ide_indexes &= ~(1 << idx); 1564 mutex_unlock(&ide_cfg_mtx); 1565} 1566 1567struct ide_host *ide_host_alloc_all(const struct ide_port_info *d, 1568 hw_regs_t **hws) 1569{ 1570 struct ide_host *host; 1571 int i; 1572 1573 host = kzalloc(sizeof(*host), GFP_KERNEL); 1574 if (host == NULL) 1575 return NULL; 1576 1577 for (i = 0; i < MAX_HWIFS; i++) { 1578 ide_hwif_t *hwif; 1579 int idx; 1580 1581 if (hws[i] == NULL) 1582 continue; 1583 1584 hwif = kzalloc(sizeof(*hwif), GFP_KERNEL); 1585 if (hwif == NULL) 1586 continue; 1587 1588 idx = ide_find_port_slot(d); 1589 if (idx < 0) { 1590 printk(KERN_ERR "%s: no free slot for interface\n", 1591 d ? d->name : "ide"); 1592 kfree(hwif); 1593 continue; 1594 } 1595 1596 ide_init_port_data(hwif, idx); 1597 1598 host->ports[i] = hwif; 1599 host->n_ports++; 1600 } 1601 1602 if (host->n_ports == 0) { 1603 kfree(host); 1604 return NULL; 1605 } 1606 1607 return host; 1608} 1609EXPORT_SYMBOL_GPL(ide_host_alloc_all); 1610 1611struct ide_host *ide_host_alloc(const struct ide_port_info *d, hw_regs_t **hws) 1612{ 1613 hw_regs_t *hws_all[MAX_HWIFS]; 1614 int i; 1615 1616 for (i = 0; i < MAX_HWIFS; i++) 1617 hws_all[i] = (i < 4) ? hws[i] : NULL; 1618 1619 return ide_host_alloc_all(d, hws_all); 1620} 1621EXPORT_SYMBOL_GPL(ide_host_alloc); 1622 1623int ide_host_register(struct ide_host *host, const struct ide_port_info *d, 1624 hw_regs_t **hws) 1625{ 1626 ide_hwif_t *hwif, *mate = NULL; 1627 int i, j = 0; 1628 1629 for (i = 0; i < MAX_HWIFS; i++) { 1630 hwif = host->ports[i]; 1631 1632 if (hwif == NULL) { 1633 mate = NULL; 1634 continue; 1635 } 1636 1637 ide_init_port_hw(hwif, hws[i]); 1638 ide_port_apply_params(hwif); 1639 1640 if (d == NULL) { 1641 mate = NULL; 1642 continue; 1643 } 1644 1645 if ((i & 1) && mate) { 1646 hwif->mate = mate; 1647 mate->mate = hwif; 1648 } 1649 1650 mate = (i & 1) ? NULL : hwif; 1651 1652 ide_init_port(hwif, i & 1, d); 1653 ide_port_cable_detect(hwif); 1654 ide_port_init_devices(hwif); 1655 } 1656 1657 for (i = 0; i < MAX_HWIFS; i++) { 1658 hwif = host->ports[i]; 1659 1660 if (hwif == NULL) 1661 continue; 1662 1663 if (ide_probe_port(hwif) == 0) 1664 hwif->present = 1; 1665 1666 if (hwif->chipset != ide_4drives || !hwif->mate || 1667 !hwif->mate->present) 1668 ide_register_port(hwif); 1669 1670 if (hwif->present) 1671 ide_port_tune_devices(hwif); 1672 } 1673 1674 for (i = 0; i < MAX_HWIFS; i++) { 1675 hwif = host->ports[i]; 1676 1677 if (hwif == NULL) 1678 continue; 1679 1680 if (hwif_init(hwif) == 0) { 1681 printk(KERN_INFO "%s: failed to initialize IDE " 1682 "interface\n", hwif->name); 1683 hwif->present = 0; 1684 continue; 1685 } 1686 1687 j++; 1688 1689 if (hwif->present) 1690 ide_port_setup_devices(hwif); 1691 1692 ide_acpi_init(hwif); 1693 1694 if (hwif->present) 1695 ide_acpi_port_init_devices(hwif); 1696 } 1697 1698 for (i = 0; i < MAX_HWIFS; i++) { 1699 hwif = host->ports[i]; 1700 1701 if (hwif == NULL) 1702 continue; 1703 1704 if (hwif->chipset == ide_unknown) 1705 hwif->chipset = ide_generic; 1706 1707 if (hwif->present) 1708 hwif_register_devices(hwif); 1709 } 1710 1711 for (i = 0; i < MAX_HWIFS; i++) { 1712 hwif = host->ports[i]; 1713 1714 if (hwif == NULL) 1715 continue; 1716 1717 ide_sysfs_register_port(hwif); 1718 ide_proc_register_port(hwif); 1719 1720 if (hwif->present) 1721 ide_proc_port_register_devices(hwif); 1722 } 1723 1724 return j ? 0 : -1; 1725} 1726EXPORT_SYMBOL_GPL(ide_host_register); 1727 1728int ide_host_add(const struct ide_port_info *d, hw_regs_t **hws, 1729 struct ide_host **hostp) 1730{ 1731 struct ide_host *host; 1732 1733 host = ide_host_alloc(d, hws); 1734 if (host == NULL) 1735 return -ENOMEM; 1736 1737 ide_host_register(host, d, hws); 1738 1739 if (hostp) 1740 *hostp = host; 1741 1742 return 0; 1743} 1744EXPORT_SYMBOL_GPL(ide_host_add); 1745 1746void ide_host_remove(struct ide_host *host) 1747{ 1748 ide_hwif_t *hwif; 1749 int i; 1750 1751 for (i = 0; i < MAX_HWIFS; i++) { 1752 hwif = host->ports[i]; 1753 1754 if (hwif == NULL) 1755 continue; 1756 1757 ide_unregister(hwif); 1758 ide_free_port_slot(hwif->index); 1759 kfree(hwif); 1760 } 1761 1762 kfree(host); 1763} 1764EXPORT_SYMBOL_GPL(ide_host_remove); 1765 1766void ide_port_scan(ide_hwif_t *hwif) 1767{ 1768 ide_port_apply_params(hwif); 1769 ide_port_cable_detect(hwif); 1770 ide_port_init_devices(hwif); 1771 1772 if (ide_probe_port(hwif) < 0) 1773 return; 1774 1775 hwif->present = 1; 1776 1777 ide_port_tune_devices(hwif); 1778 ide_acpi_port_init_devices(hwif); 1779 ide_port_setup_devices(hwif); 1780 hwif_register_devices(hwif); 1781 ide_proc_port_register_devices(hwif); 1782} 1783EXPORT_SYMBOL_GPL(ide_port_scan); 1784 1785static void ide_legacy_init_one(hw_regs_t **hws, hw_regs_t *hw, 1786 u8 port_no, const struct ide_port_info *d, 1787 unsigned long config) 1788{ 1789 unsigned long base, ctl; 1790 int irq; 1791 1792 if (port_no == 0) { 1793 base = 0x1f0; 1794 ctl = 0x3f6; 1795 irq = 14; 1796 } else { 1797 base = 0x170; 1798 ctl = 0x376; 1799 irq = 15; 1800 } 1801 1802 if (!request_region(base, 8, d->name)) { 1803 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n", 1804 d->name, base, base + 7); 1805 return; 1806 } 1807 1808 if (!request_region(ctl, 1, d->name)) { 1809 printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n", 1810 d->name, ctl); 1811 release_region(base, 8); 1812 return; 1813 } 1814 1815 ide_std_init_ports(hw, base, ctl); 1816 hw->irq = irq; 1817 hw->chipset = d->chipset; 1818 hw->config = config; 1819 1820 hws[port_no] = hw; 1821} 1822 1823int ide_legacy_device_add(const struct ide_port_info *d, unsigned long config) 1824{ 1825 hw_regs_t hw[2], *hws[] = { NULL, NULL, NULL, NULL }; 1826 1827 memset(&hw, 0, sizeof(hw)); 1828 1829 if ((d->host_flags & IDE_HFLAG_QD_2ND_PORT) == 0) 1830 ide_legacy_init_one(hws, &hw[0], 0, d, config); 1831 ide_legacy_init_one(hws, &hw[1], 1, d, config); 1832 1833 if (hws[0] == NULL && hws[1] == NULL && 1834 (d->host_flags & IDE_HFLAG_SINGLE)) 1835 return -ENOENT; 1836 1837 return ide_host_add(d, hws, NULL); 1838} 1839EXPORT_SYMBOL_GPL(ide_legacy_device_add); 1840