ide-probe.c revision 3ee074bf432d24a92894397ac48ad2f2bb95efdc
1/* 2 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below) 3 * Copyright (C) 2005, 2007 Bartlomiej Zolnierkiewicz 4 */ 5 6/* 7 * Mostly written by Mark Lord <mlord@pobox.com> 8 * and Gadi Oxman <gadio@netvision.net.il> 9 * and Andre Hedrick <andre@linux-ide.org> 10 * 11 * See linux/MAINTAINERS for address of current maintainer. 12 * 13 * This is the IDE probe module, as evolved from hd.c and ide.c. 14 * 15 * -- increase WAIT_PIDENTIFY to avoid CD-ROM locking at boot 16 * by Andrea Arcangeli 17 */ 18 19#include <linux/module.h> 20#include <linux/types.h> 21#include <linux/string.h> 22#include <linux/kernel.h> 23#include <linux/timer.h> 24#include <linux/mm.h> 25#include <linux/interrupt.h> 26#include <linux/major.h> 27#include <linux/errno.h> 28#include <linux/genhd.h> 29#include <linux/slab.h> 30#include <linux/delay.h> 31#include <linux/ide.h> 32#include <linux/spinlock.h> 33#include <linux/kmod.h> 34#include <linux/pci.h> 35#include <linux/scatterlist.h> 36 37#include <asm/byteorder.h> 38#include <asm/irq.h> 39#include <asm/uaccess.h> 40#include <asm/io.h> 41 42/** 43 * generic_id - add a generic drive id 44 * @drive: drive to make an ID block for 45 * 46 * Add a fake id field to the drive we are passed. This allows 47 * use to skip a ton of NULL checks (which people always miss) 48 * and make drive properties unconditional outside of this file 49 */ 50 51static void generic_id(ide_drive_t *drive) 52{ 53 u16 *id = drive->id; 54 55 id[ATA_ID_CUR_CYLS] = id[ATA_ID_CYLS] = drive->cyl; 56 id[ATA_ID_CUR_HEADS] = id[ATA_ID_HEADS] = drive->head; 57 id[ATA_ID_CUR_SECTORS] = id[ATA_ID_SECTORS] = drive->sect; 58} 59 60static void ide_disk_init_chs(ide_drive_t *drive) 61{ 62 u16 *id = drive->id; 63 64 /* Extract geometry if we did not already have one for the drive */ 65 if (!drive->cyl || !drive->head || !drive->sect) { 66 drive->cyl = drive->bios_cyl = id[ATA_ID_CYLS]; 67 drive->head = drive->bios_head = id[ATA_ID_HEADS]; 68 drive->sect = drive->bios_sect = id[ATA_ID_SECTORS]; 69 } 70 71 /* Handle logical geometry translation by the drive */ 72 if (ata_id_current_chs_valid(id)) { 73 drive->cyl = id[ATA_ID_CUR_CYLS]; 74 drive->head = id[ATA_ID_CUR_HEADS]; 75 drive->sect = id[ATA_ID_CUR_SECTORS]; 76 } 77 78 /* Use physical geometry if what we have still makes no sense */ 79 if (drive->head > 16 && id[ATA_ID_HEADS] && id[ATA_ID_HEADS] <= 16) { 80 drive->cyl = id[ATA_ID_CYLS]; 81 drive->head = id[ATA_ID_HEADS]; 82 drive->sect = id[ATA_ID_SECTORS]; 83 } 84} 85 86static void ide_disk_init_mult_count(ide_drive_t *drive) 87{ 88 u16 *id = drive->id; 89 u8 max_multsect = id[ATA_ID_MAX_MULTSECT] & 0xff; 90 91 if (max_multsect) { 92 if ((max_multsect / 2) > 1) 93 id[ATA_ID_MULTSECT] = max_multsect | 0x100; 94 else 95 id[ATA_ID_MULTSECT] &= ~0x1ff; 96 97 drive->mult_req = id[ATA_ID_MULTSECT] & 0xff; 98 99 if (drive->mult_req) 100 drive->special.b.set_multmode = 1; 101 } 102} 103 104/** 105 * do_identify - identify a drive 106 * @drive: drive to identify 107 * @cmd: command used 108 * 109 * Called when we have issued a drive identify command to 110 * read and parse the results. This function is run with 111 * interrupts disabled. 112 */ 113 114static inline void do_identify (ide_drive_t *drive, u8 cmd) 115{ 116 ide_hwif_t *hwif = HWIF(drive); 117 u16 *id = drive->id; 118 char *m = (char *)&id[ATA_ID_PROD]; 119 int bswap = 1, is_cfa; 120 121 /* read 512 bytes of id info */ 122 hwif->tp_ops->input_data(drive, NULL, id, SECTOR_SIZE); 123 124 drive->dev_flags |= IDE_DFLAG_ID_READ; 125 126 local_irq_enable(); 127#ifdef DEBUG 128 printk(KERN_INFO "%s: dumping identify data\n", drive->name); 129 ide_dump_identify((u8 *)id); 130#endif 131 ide_fix_driveid(id); 132 133 /* 134 * ATA_CMD_ID_ATA returns little-endian info, 135 * ATA_CMD_ID_ATAPI *usually* returns little-endian info. 136 */ 137 if (cmd == ATA_CMD_ID_ATAPI) { 138 if ((m[0] == 'N' && m[1] == 'E') || /* NEC */ 139 (m[0] == 'F' && m[1] == 'X') || /* Mitsumi */ 140 (m[0] == 'P' && m[1] == 'i')) /* Pioneer */ 141 /* Vertos drives may still be weird */ 142 bswap ^= 1; 143 } 144 145 ide_fixstring(m, ATA_ID_PROD_LEN, bswap); 146 ide_fixstring((char *)&id[ATA_ID_FW_REV], ATA_ID_FW_REV_LEN, bswap); 147 ide_fixstring((char *)&id[ATA_ID_SERNO], ATA_ID_SERNO_LEN, bswap); 148 149 /* we depend on this a lot! */ 150 m[ATA_ID_PROD_LEN - 1] = '\0'; 151 152 if (strstr(m, "E X A B Y T E N E S T")) 153 goto err_misc; 154 155 printk(KERN_INFO "%s: %s, ", drive->name, m); 156 157 drive->dev_flags |= IDE_DFLAG_PRESENT; 158 drive->dev_flags &= ~IDE_DFLAG_DEAD; 159 160 /* 161 * Check for an ATAPI device 162 */ 163 if (cmd == ATA_CMD_ID_ATAPI) { 164 u8 type = (id[ATA_ID_CONFIG] >> 8) & 0x1f; 165 166 printk(KERN_CONT "ATAPI "); 167 switch (type) { 168 case ide_floppy: 169 if (!strstr(m, "CD-ROM")) { 170 if (!strstr(m, "oppy") && 171 !strstr(m, "poyp") && 172 !strstr(m, "ZIP")) 173 printk(KERN_CONT "cdrom or floppy?, assuming "); 174 if (drive->media != ide_cdrom) { 175 printk(KERN_CONT "FLOPPY"); 176 drive->dev_flags |= IDE_DFLAG_REMOVABLE; 177 break; 178 } 179 } 180 /* Early cdrom models used zero */ 181 type = ide_cdrom; 182 case ide_cdrom: 183 drive->dev_flags |= IDE_DFLAG_REMOVABLE; 184#ifdef CONFIG_PPC 185 /* kludge for Apple PowerBook internal zip */ 186 if (!strstr(m, "CD-ROM") && strstr(m, "ZIP")) { 187 printk(KERN_CONT "FLOPPY"); 188 type = ide_floppy; 189 break; 190 } 191#endif 192 printk(KERN_CONT "CD/DVD-ROM"); 193 break; 194 case ide_tape: 195 printk(KERN_CONT "TAPE"); 196 break; 197 case ide_optical: 198 printk(KERN_CONT "OPTICAL"); 199 drive->dev_flags |= IDE_DFLAG_REMOVABLE; 200 break; 201 default: 202 printk(KERN_CONT "UNKNOWN (type %d)", type); 203 break; 204 } 205 printk(KERN_CONT " drive\n"); 206 drive->media = type; 207 /* an ATAPI device ignores DRDY */ 208 drive->ready_stat = 0; 209 if (ata_id_cdb_intr(id)) 210 drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT; 211 /* we don't do head unloading on ATAPI devices */ 212 drive->dev_flags |= IDE_DFLAG_NO_UNLOAD; 213 return; 214 } 215 216 /* 217 * Not an ATAPI device: looks like a "regular" hard disk 218 */ 219 220 is_cfa = ata_id_is_cfa(id); 221 222 /* CF devices are *not* removable in Linux definition of the term */ 223 if (is_cfa == 0 && (id[ATA_ID_CONFIG] & (1 << 7))) 224 drive->dev_flags |= IDE_DFLAG_REMOVABLE; 225 226 drive->media = ide_disk; 227 228 if (!ata_id_has_unload(drive->id)) 229 drive->dev_flags |= IDE_DFLAG_NO_UNLOAD; 230 231 printk(KERN_CONT "%s DISK drive\n", is_cfa ? "CFA" : "ATA"); 232 233 return; 234 235err_misc: 236 kfree(id); 237 drive->dev_flags &= ~IDE_DFLAG_PRESENT; 238 return; 239} 240 241/** 242 * actual_try_to_identify - send ata/atapi identify 243 * @drive: drive to identify 244 * @cmd: command to use 245 * 246 * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive 247 * and waits for a response. It also monitors irqs while this is 248 * happening, in hope of automatically determining which one is 249 * being used by the interface. 250 * 251 * Returns: 0 device was identified 252 * 1 device timed-out (no response to identify request) 253 * 2 device aborted the command (refused to identify itself) 254 */ 255 256static int actual_try_to_identify (ide_drive_t *drive, u8 cmd) 257{ 258 ide_hwif_t *hwif = HWIF(drive); 259 struct ide_io_ports *io_ports = &hwif->io_ports; 260 const struct ide_tp_ops *tp_ops = hwif->tp_ops; 261 int use_altstatus = 0, rc; 262 unsigned long timeout; 263 u8 s = 0, a = 0; 264 265 /* take a deep breath */ 266 msleep(50); 267 268 if (io_ports->ctl_addr) { 269 a = tp_ops->read_altstatus(hwif); 270 s = tp_ops->read_status(hwif); 271 if ((a ^ s) & ~ATA_IDX) 272 /* ancient Seagate drives, broken interfaces */ 273 printk(KERN_INFO "%s: probing with STATUS(0x%02x) " 274 "instead of ALTSTATUS(0x%02x)\n", 275 drive->name, s, a); 276 else 277 /* use non-intrusive polling */ 278 use_altstatus = 1; 279 } 280 281 /* set features register for atapi 282 * identify command to be sure of reply 283 */ 284 if (cmd == ATA_CMD_ID_ATAPI) { 285 ide_task_t task; 286 287 memset(&task, 0, sizeof(task)); 288 /* disable DMA & overlap */ 289 task.tf_flags = IDE_TFLAG_OUT_FEATURE; 290 291 tp_ops->tf_load(drive, &task); 292 } 293 294 /* ask drive for ID */ 295 tp_ops->exec_command(hwif, cmd); 296 297 timeout = ((cmd == ATA_CMD_ID_ATA) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2; 298 299 if (ide_busy_sleep(hwif, timeout, use_altstatus)) 300 return 1; 301 302 /* wait for IRQ and ATA_DRQ */ 303 msleep(50); 304 s = tp_ops->read_status(hwif); 305 306 if (OK_STAT(s, ATA_DRQ, BAD_R_STAT)) { 307 unsigned long flags; 308 309 /* local CPU only; some systems need this */ 310 local_irq_save(flags); 311 /* drive returned ID */ 312 do_identify(drive, cmd); 313 /* drive responded with ID */ 314 rc = 0; 315 /* clear drive IRQ */ 316 (void)tp_ops->read_status(hwif); 317 local_irq_restore(flags); 318 } else { 319 /* drive refused ID */ 320 rc = 2; 321 } 322 return rc; 323} 324 325/** 326 * try_to_identify - try to identify a drive 327 * @drive: drive to probe 328 * @cmd: command to use 329 * 330 * Issue the identify command and then do IRQ probing to 331 * complete the identification when needed by finding the 332 * IRQ the drive is attached to 333 */ 334 335static int try_to_identify (ide_drive_t *drive, u8 cmd) 336{ 337 ide_hwif_t *hwif = HWIF(drive); 338 const struct ide_tp_ops *tp_ops = hwif->tp_ops; 339 int retval; 340 int autoprobe = 0; 341 unsigned long cookie = 0; 342 343 /* 344 * Disable device irq unless we need to 345 * probe for it. Otherwise we'll get spurious 346 * interrupts during the identify-phase that 347 * the irq handler isn't expecting. 348 */ 349 if (hwif->io_ports.ctl_addr) { 350 if (!hwif->irq) { 351 autoprobe = 1; 352 cookie = probe_irq_on(); 353 } 354 tp_ops->set_irq(hwif, autoprobe); 355 } 356 357 retval = actual_try_to_identify(drive, cmd); 358 359 if (autoprobe) { 360 int irq; 361 362 tp_ops->set_irq(hwif, 0); 363 /* clear drive IRQ */ 364 (void)tp_ops->read_status(hwif); 365 udelay(5); 366 irq = probe_irq_off(cookie); 367 if (!hwif->irq) { 368 if (irq > 0) { 369 hwif->irq = irq; 370 } else { 371 /* Mmmm.. multiple IRQs.. 372 * don't know which was ours 373 */ 374 printk(KERN_ERR "%s: IRQ probe failed (0x%lx)\n", 375 drive->name, cookie); 376 } 377 } 378 } 379 return retval; 380} 381 382int ide_busy_sleep(ide_hwif_t *hwif, unsigned long timeout, int altstatus) 383{ 384 u8 stat; 385 386 timeout += jiffies; 387 388 do { 389 msleep(50); /* give drive a breather */ 390 stat = altstatus ? hwif->tp_ops->read_altstatus(hwif) 391 : hwif->tp_ops->read_status(hwif); 392 if ((stat & ATA_BUSY) == 0) 393 return 0; 394 } while (time_before(jiffies, timeout)); 395 396 return 1; /* drive timed-out */ 397} 398 399static u8 ide_read_device(ide_drive_t *drive) 400{ 401 ide_task_t task; 402 403 memset(&task, 0, sizeof(task)); 404 task.tf_flags = IDE_TFLAG_IN_DEVICE; 405 406 drive->hwif->tp_ops->tf_read(drive, &task); 407 408 return task.tf.device; 409} 410 411/** 412 * do_probe - probe an IDE device 413 * @drive: drive to probe 414 * @cmd: command to use 415 * 416 * do_probe() has the difficult job of finding a drive if it exists, 417 * without getting hung up if it doesn't exist, without trampling on 418 * ethernet cards, and without leaving any IRQs dangling to haunt us later. 419 * 420 * If a drive is "known" to exist (from CMOS or kernel parameters), 421 * but does not respond right away, the probe will "hang in there" 422 * for the maximum wait time (about 30 seconds), otherwise it will 423 * exit much more quickly. 424 * 425 * Returns: 0 device was identified 426 * 1 device timed-out (no response to identify request) 427 * 2 device aborted the command (refused to identify itself) 428 * 3 bad status from device (possible for ATAPI drives) 429 * 4 probe was not attempted because failure was obvious 430 */ 431 432static int do_probe (ide_drive_t *drive, u8 cmd) 433{ 434 ide_hwif_t *hwif = HWIF(drive); 435 const struct ide_tp_ops *tp_ops = hwif->tp_ops; 436 int rc; 437 u8 present = !!(drive->dev_flags & IDE_DFLAG_PRESENT), stat; 438 439 /* avoid waiting for inappropriate probes */ 440 if (present && drive->media != ide_disk && cmd == ATA_CMD_ID_ATA) 441 return 4; 442 443#ifdef DEBUG 444 printk(KERN_INFO "probing for %s: present=%d, media=%d, probetype=%s\n", 445 drive->name, present, drive->media, 446 (cmd == ATA_CMD_ID_ATA) ? "ATA" : "ATAPI"); 447#endif 448 449 /* needed for some systems 450 * (e.g. crw9624 as drive0 with disk as slave) 451 */ 452 msleep(50); 453 SELECT_DRIVE(drive); 454 msleep(50); 455 456 if (ide_read_device(drive) != drive->select && present == 0) { 457 if (drive->dn & 1) { 458 /* exit with drive0 selected */ 459 SELECT_DRIVE(&hwif->drives[0]); 460 /* allow ATA_BUSY to assert & clear */ 461 msleep(50); 462 } 463 /* no i/f present: mmm.. this should be a 4 -ml */ 464 return 3; 465 } 466 467 stat = tp_ops->read_status(hwif); 468 469 if (OK_STAT(stat, ATA_DRDY, ATA_BUSY) || 470 present || cmd == ATA_CMD_ID_ATAPI) { 471 /* send cmd and wait */ 472 if ((rc = try_to_identify(drive, cmd))) { 473 /* failed: try again */ 474 rc = try_to_identify(drive,cmd); 475 } 476 477 stat = tp_ops->read_status(hwif); 478 479 if (stat == (ATA_BUSY | ATA_DRDY)) 480 return 4; 481 482 if (rc == 1 && cmd == ATA_CMD_ID_ATAPI) { 483 printk(KERN_ERR "%s: no response (status = 0x%02x), " 484 "resetting drive\n", drive->name, stat); 485 msleep(50); 486 SELECT_DRIVE(drive); 487 msleep(50); 488 tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET); 489 (void)ide_busy_sleep(hwif, WAIT_WORSTCASE, 0); 490 rc = try_to_identify(drive, cmd); 491 } 492 493 /* ensure drive IRQ is clear */ 494 stat = tp_ops->read_status(hwif); 495 496 if (rc == 1) 497 printk(KERN_ERR "%s: no response (status = 0x%02x)\n", 498 drive->name, stat); 499 } else { 500 /* not present or maybe ATAPI */ 501 rc = 3; 502 } 503 if (drive->dn & 1) { 504 /* exit with drive0 selected */ 505 SELECT_DRIVE(&hwif->drives[0]); 506 msleep(50); 507 /* ensure drive irq is clear */ 508 (void)tp_ops->read_status(hwif); 509 } 510 return rc; 511} 512 513/* 514 * 515 */ 516static void enable_nest (ide_drive_t *drive) 517{ 518 ide_hwif_t *hwif = HWIF(drive); 519 const struct ide_tp_ops *tp_ops = hwif->tp_ops; 520 u8 stat; 521 522 printk(KERN_INFO "%s: enabling %s -- ", 523 hwif->name, (char *)&drive->id[ATA_ID_PROD]); 524 525 SELECT_DRIVE(drive); 526 msleep(50); 527 tp_ops->exec_command(hwif, ATA_EXABYTE_ENABLE_NEST); 528 529 if (ide_busy_sleep(hwif, WAIT_WORSTCASE, 0)) { 530 printk(KERN_CONT "failed (timeout)\n"); 531 return; 532 } 533 534 msleep(50); 535 536 stat = tp_ops->read_status(hwif); 537 538 if (!OK_STAT(stat, 0, BAD_STAT)) 539 printk(KERN_CONT "failed (status = 0x%02x)\n", stat); 540 else 541 printk(KERN_CONT "success\n"); 542} 543 544/** 545 * probe_for_drives - upper level drive probe 546 * @drive: drive to probe for 547 * 548 * probe_for_drive() tests for existence of a given drive using do_probe() 549 * and presents things to the user as needed. 550 * 551 * Returns: 0 no device was found 552 * 1 device was found 553 * (note: IDE_DFLAG_PRESENT might still be not set) 554 */ 555 556static inline u8 probe_for_drive (ide_drive_t *drive) 557{ 558 char *m; 559 560 /* 561 * In order to keep things simple we have an id 562 * block for all drives at all times. If the device 563 * is pre ATA or refuses ATA/ATAPI identify we 564 * will add faked data to this. 565 * 566 * Also note that 0 everywhere means "can't do X" 567 */ 568 569 drive->dev_flags &= ~IDE_DFLAG_ID_READ; 570 571 drive->id = kzalloc(SECTOR_SIZE, GFP_KERNEL); 572 if (drive->id == NULL) { 573 printk(KERN_ERR "ide: out of memory for id data.\n"); 574 return 0; 575 } 576 577 m = (char *)&drive->id[ATA_ID_PROD]; 578 strcpy(m, "UNKNOWN"); 579 580 /* skip probing? */ 581 if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0) { 582retry: 583 /* if !(success||timed-out) */ 584 if (do_probe(drive, ATA_CMD_ID_ATA) >= 2) 585 /* look for ATAPI device */ 586 (void)do_probe(drive, ATA_CMD_ID_ATAPI); 587 588 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) 589 /* drive not found */ 590 return 0; 591 592 if (strstr(m, "E X A B Y T E N E S T")) { 593 enable_nest(drive); 594 goto retry; 595 } 596 597 /* identification failed? */ 598 if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) { 599 if (drive->media == ide_disk) { 600 printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n", 601 drive->name, drive->cyl, 602 drive->head, drive->sect); 603 } else if (drive->media == ide_cdrom) { 604 printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name); 605 } else { 606 /* nuke it */ 607 printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name); 608 drive->dev_flags &= ~IDE_DFLAG_PRESENT; 609 } 610 } 611 /* drive was found */ 612 } 613 614 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) 615 return 0; 616 617 /* The drive wasn't being helpful. Add generic info only */ 618 if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) { 619 generic_id(drive); 620 return 1; 621 } 622 623 if (drive->media == ide_disk) { 624 ide_disk_init_chs(drive); 625 ide_disk_init_mult_count(drive); 626 } 627 628 return !!(drive->dev_flags & IDE_DFLAG_PRESENT); 629} 630 631static void hwif_release_dev(struct device *dev) 632{ 633 ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev); 634 635 complete(&hwif->gendev_rel_comp); 636} 637 638static int ide_register_port(ide_hwif_t *hwif) 639{ 640 int ret; 641 642 /* register with global device tree */ 643 strlcpy(hwif->gendev.bus_id,hwif->name,BUS_ID_SIZE); 644 hwif->gendev.driver_data = hwif; 645 if (hwif->gendev.parent == NULL) { 646 if (hwif->dev) 647 hwif->gendev.parent = hwif->dev; 648 else 649 /* Would like to do = &device_legacy */ 650 hwif->gendev.parent = NULL; 651 } 652 hwif->gendev.release = hwif_release_dev; 653 ret = device_register(&hwif->gendev); 654 if (ret < 0) { 655 printk(KERN_WARNING "IDE: %s: device_register error: %d\n", 656 __func__, ret); 657 goto out; 658 } 659 660 hwif->portdev = device_create(ide_port_class, &hwif->gendev, 661 MKDEV(0, 0), hwif, hwif->name); 662 if (IS_ERR(hwif->portdev)) { 663 ret = PTR_ERR(hwif->portdev); 664 device_unregister(&hwif->gendev); 665 } 666out: 667 return ret; 668} 669 670/** 671 * ide_port_wait_ready - wait for port to become ready 672 * @hwif: IDE port 673 * 674 * This is needed on some PPCs and a bunch of BIOS-less embedded 675 * platforms. Typical cases are: 676 * 677 * - The firmware hard reset the disk before booting the kernel, 678 * the drive is still doing it's poweron-reset sequence, that 679 * can take up to 30 seconds. 680 * 681 * - The firmware does nothing (or no firmware), the device is 682 * still in POST state (same as above actually). 683 * 684 * - Some CD/DVD/Writer combo drives tend to drive the bus during 685 * their reset sequence even when they are non-selected slave 686 * devices, thus preventing discovery of the main HD. 687 * 688 * Doing this wait-for-non-busy should not harm any existing 689 * configuration and fix some issues like the above. 690 * 691 * BenH. 692 * 693 * Returns 0 on success, error code (< 0) otherwise. 694 */ 695 696static int ide_port_wait_ready(ide_hwif_t *hwif) 697{ 698 int unit, rc; 699 700 printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name); 701 702 /* Let HW settle down a bit from whatever init state we 703 * come from */ 704 mdelay(2); 705 706 /* Wait for BSY bit to go away, spec timeout is 30 seconds, 707 * I know of at least one disk who takes 31 seconds, I use 35 708 * here to be safe 709 */ 710 rc = ide_wait_not_busy(hwif, 35000); 711 if (rc) 712 return rc; 713 714 /* Now make sure both master & slave are ready */ 715 for (unit = 0; unit < MAX_DRIVES; unit++) { 716 ide_drive_t *drive = &hwif->drives[unit]; 717 718 /* Ignore disks that we will not probe for later. */ 719 if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0 || 720 (drive->dev_flags & IDE_DFLAG_PRESENT)) { 721 SELECT_DRIVE(drive); 722 hwif->tp_ops->set_irq(hwif, 1); 723 mdelay(2); 724 rc = ide_wait_not_busy(hwif, 35000); 725 if (rc) 726 goto out; 727 } else 728 printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n", 729 drive->name); 730 } 731out: 732 /* Exit function with master reselected (let's be sane) */ 733 if (unit) 734 SELECT_DRIVE(&hwif->drives[0]); 735 736 return rc; 737} 738 739/** 740 * ide_undecoded_slave - look for bad CF adapters 741 * @dev1: slave device 742 * 743 * Analyse the drives on the interface and attempt to decide if we 744 * have the same drive viewed twice. This occurs with crap CF adapters 745 * and PCMCIA sometimes. 746 */ 747 748void ide_undecoded_slave(ide_drive_t *dev1) 749{ 750 ide_drive_t *dev0 = &dev1->hwif->drives[0]; 751 752 if ((dev1->dn & 1) == 0 || (dev0->dev_flags & IDE_DFLAG_PRESENT) == 0) 753 return; 754 755 /* If the models don't match they are not the same product */ 756 if (strcmp((char *)&dev0->id[ATA_ID_PROD], 757 (char *)&dev1->id[ATA_ID_PROD])) 758 return; 759 760 /* Serial numbers do not match */ 761 if (strncmp((char *)&dev0->id[ATA_ID_SERNO], 762 (char *)&dev1->id[ATA_ID_SERNO], ATA_ID_SERNO_LEN)) 763 return; 764 765 /* No serial number, thankfully very rare for CF */ 766 if (*(char *)&dev0->id[ATA_ID_SERNO] == 0) 767 return; 768 769 /* Appears to be an IDE flash adapter with decode bugs */ 770 printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n"); 771 772 dev1->dev_flags &= ~IDE_DFLAG_PRESENT; 773} 774 775EXPORT_SYMBOL_GPL(ide_undecoded_slave); 776 777static int ide_probe_port(ide_hwif_t *hwif) 778{ 779 unsigned long flags; 780 unsigned int irqd; 781 int unit, rc = -ENODEV; 782 783 BUG_ON(hwif->present); 784 785 if ((hwif->drives[0].dev_flags & IDE_DFLAG_NOPROBE) && 786 (hwif->drives[1].dev_flags & IDE_DFLAG_NOPROBE)) 787 return -EACCES; 788 789 /* 790 * We must always disable IRQ, as probe_for_drive will assert IRQ, but 791 * we'll install our IRQ driver much later... 792 */ 793 irqd = hwif->irq; 794 if (irqd) 795 disable_irq(hwif->irq); 796 797 local_irq_set(flags); 798 799 if (ide_port_wait_ready(hwif) == -EBUSY) 800 printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name); 801 802 /* 803 * Second drive should only exist if first drive was found, 804 * but a lot of cdrom drives are configured as single slaves. 805 */ 806 for (unit = 0; unit < MAX_DRIVES; ++unit) { 807 ide_drive_t *drive = &hwif->drives[unit]; 808 809 (void) probe_for_drive(drive); 810 if (drive->dev_flags & IDE_DFLAG_PRESENT) 811 rc = 0; 812 } 813 814 local_irq_restore(flags); 815 816 /* 817 * Use cached IRQ number. It might be (and is...) changed by probe 818 * code above 819 */ 820 if (irqd) 821 enable_irq(irqd); 822 823 return rc; 824} 825 826static void ide_port_tune_devices(ide_hwif_t *hwif) 827{ 828 const struct ide_port_ops *port_ops = hwif->port_ops; 829 int unit; 830 831 for (unit = 0; unit < MAX_DRIVES; unit++) { 832 ide_drive_t *drive = &hwif->drives[unit]; 833 834 if (drive->dev_flags & IDE_DFLAG_PRESENT) { 835 if (port_ops && port_ops->quirkproc) 836 port_ops->quirkproc(drive); 837 } 838 } 839 840 for (unit = 0; unit < MAX_DRIVES; ++unit) { 841 ide_drive_t *drive = &hwif->drives[unit]; 842 843 if (drive->dev_flags & IDE_DFLAG_PRESENT) { 844 ide_set_max_pio(drive); 845 846 drive->dev_flags |= IDE_DFLAG_NICE1; 847 848 if (hwif->dma_ops) 849 ide_set_dma(drive); 850 } 851 } 852 853 for (unit = 0; unit < MAX_DRIVES; ++unit) { 854 ide_drive_t *drive = &hwif->drives[unit]; 855 856 if ((hwif->host_flags & IDE_HFLAG_NO_IO_32BIT) || 857 drive->id[ATA_ID_DWORD_IO]) 858 drive->dev_flags |= IDE_DFLAG_NO_IO_32BIT; 859 else 860 drive->dev_flags &= ~IDE_DFLAG_NO_IO_32BIT; 861 } 862} 863 864/* 865 * save_match() is used to simplify logic in init_irq() below. 866 * 867 * A loophole here is that we may not know about a particular 868 * hwif's irq until after that hwif is actually probed/initialized.. 869 * This could be a problem for the case where an hwif is on a 870 * dual interface that requires serialization (eg. cmd640) and another 871 * hwif using one of the same irqs is initialized beforehand. 872 * 873 * This routine detects and reports such situations, but does not fix them. 874 */ 875static void save_match(ide_hwif_t *hwif, ide_hwif_t *new, ide_hwif_t **match) 876{ 877 ide_hwif_t *m = *match; 878 879 if (m && m->hwgroup && m->hwgroup != new->hwgroup) { 880 if (!new->hwgroup) 881 return; 882 printk(KERN_WARNING "%s: potential IRQ problem with %s and %s\n", 883 hwif->name, new->name, m->name); 884 } 885 if (!m || m->irq != hwif->irq) /* don't undo a prior perfect match */ 886 *match = new; 887} 888 889/* 890 * init request queue 891 */ 892static int ide_init_queue(ide_drive_t *drive) 893{ 894 struct request_queue *q; 895 ide_hwif_t *hwif = HWIF(drive); 896 int max_sectors = 256; 897 int max_sg_entries = PRD_ENTRIES; 898 899 /* 900 * Our default set up assumes the normal IDE case, 901 * that is 64K segmenting, standard PRD setup 902 * and LBA28. Some drivers then impose their own 903 * limits and LBA48 we could raise it but as yet 904 * do not. 905 */ 906 907 q = blk_init_queue_node(do_ide_request, &ide_lock, hwif_to_node(hwif)); 908 if (!q) 909 return 1; 910 911 q->queuedata = drive; 912 blk_queue_segment_boundary(q, 0xffff); 913 914 if (hwif->rqsize < max_sectors) 915 max_sectors = hwif->rqsize; 916 blk_queue_max_sectors(q, max_sectors); 917 918#ifdef CONFIG_PCI 919 /* When we have an IOMMU, we may have a problem where pci_map_sg() 920 * creates segments that don't completely match our boundary 921 * requirements and thus need to be broken up again. Because it 922 * doesn't align properly either, we may actually have to break up 923 * to more segments than what was we got in the first place, a max 924 * worst case is twice as many. 925 * This will be fixed once we teach pci_map_sg() about our boundary 926 * requirements, hopefully soon. *FIXME* 927 */ 928 if (!PCI_DMA_BUS_IS_PHYS) 929 max_sg_entries >>= 1; 930#endif /* CONFIG_PCI */ 931 932 blk_queue_max_hw_segments(q, max_sg_entries); 933 blk_queue_max_phys_segments(q, max_sg_entries); 934 935 /* assign drive queue */ 936 drive->queue = q; 937 938 /* needs drive->queue to be set */ 939 ide_toggle_bounce(drive, 1); 940 941 return 0; 942} 943 944static void ide_add_drive_to_hwgroup(ide_drive_t *drive) 945{ 946 ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; 947 948 spin_lock_irq(&ide_lock); 949 if (!hwgroup->drive) { 950 /* first drive for hwgroup. */ 951 drive->next = drive; 952 hwgroup->drive = drive; 953 hwgroup->hwif = HWIF(hwgroup->drive); 954 } else { 955 drive->next = hwgroup->drive->next; 956 hwgroup->drive->next = drive; 957 } 958 spin_unlock_irq(&ide_lock); 959} 960 961/* 962 * For any present drive: 963 * - allocate the block device queue 964 * - link drive into the hwgroup 965 */ 966static int ide_port_setup_devices(ide_hwif_t *hwif) 967{ 968 int i, j = 0; 969 970 mutex_lock(&ide_cfg_mtx); 971 for (i = 0; i < MAX_DRIVES; i++) { 972 ide_drive_t *drive = &hwif->drives[i]; 973 974 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) 975 continue; 976 977 if (ide_init_queue(drive)) { 978 printk(KERN_ERR "ide: failed to init %s\n", 979 drive->name); 980 kfree(drive->id); 981 drive->id = NULL; 982 drive->dev_flags &= ~IDE_DFLAG_PRESENT; 983 continue; 984 } 985 986 j++; 987 988 ide_add_drive_to_hwgroup(drive); 989 } 990 mutex_unlock(&ide_cfg_mtx); 991 992 return j; 993} 994 995static ide_hwif_t *ide_ports[MAX_HWIFS]; 996 997void ide_remove_port_from_hwgroup(ide_hwif_t *hwif) 998{ 999 ide_hwgroup_t *hwgroup = hwif->hwgroup; 1000 1001 ide_ports[hwif->index] = NULL; 1002 1003 spin_lock_irq(&ide_lock); 1004 /* 1005 * Remove us from the hwgroup, and free 1006 * the hwgroup if we were the only member 1007 */ 1008 if (hwif->next == hwif) { 1009 BUG_ON(hwgroup->hwif != hwif); 1010 kfree(hwgroup); 1011 } else { 1012 /* There is another interface in hwgroup. 1013 * Unlink us, and set hwgroup->drive and ->hwif to 1014 * something sane. 1015 */ 1016 ide_hwif_t *g = hwgroup->hwif; 1017 1018 while (g->next != hwif) 1019 g = g->next; 1020 g->next = hwif->next; 1021 if (hwgroup->hwif == hwif) { 1022 /* Chose a random hwif for hwgroup->hwif. 1023 * It's guaranteed that there are no drives 1024 * left in the hwgroup. 1025 */ 1026 BUG_ON(hwgroup->drive != NULL); 1027 hwgroup->hwif = g; 1028 } 1029 BUG_ON(hwgroup->hwif == hwif); 1030 } 1031 spin_unlock_irq(&ide_lock); 1032} 1033 1034/* 1035 * This routine sets up the irq for an ide interface, and creates a new 1036 * hwgroup for the irq/hwif if none was previously assigned. 1037 * 1038 * Much of the code is for correctly detecting/handling irq sharing 1039 * and irq serialization situations. This is somewhat complex because 1040 * it handles static as well as dynamic (PCMCIA) IDE interfaces. 1041 */ 1042static int init_irq (ide_hwif_t *hwif) 1043{ 1044 struct ide_io_ports *io_ports = &hwif->io_ports; 1045 unsigned int index; 1046 ide_hwgroup_t *hwgroup; 1047 ide_hwif_t *match = NULL; 1048 1049 mutex_lock(&ide_cfg_mtx); 1050 hwif->hwgroup = NULL; 1051 1052 /* 1053 * Group up with any other hwifs that share our irq(s). 1054 */ 1055 for (index = 0; index < MAX_HWIFS; index++) { 1056 ide_hwif_t *h = ide_ports[index]; 1057 1058 if (h && h->hwgroup) { /* scan only initialized ports */ 1059 if (hwif->irq == h->irq) { 1060 hwif->sharing_irq = h->sharing_irq = 1; 1061 if (hwif->chipset != ide_pci || 1062 h->chipset != ide_pci) { 1063 save_match(hwif, h, &match); 1064 } 1065 } 1066 if (hwif->serialized) { 1067 if (hwif->mate && hwif->mate->irq == h->irq) 1068 save_match(hwif, h, &match); 1069 } 1070 if (h->serialized) { 1071 if (h->mate && hwif->irq == h->mate->irq) 1072 save_match(hwif, h, &match); 1073 } 1074 } 1075 } 1076 1077 /* 1078 * If we are still without a hwgroup, then form a new one 1079 */ 1080 if (match) { 1081 hwgroup = match->hwgroup; 1082 hwif->hwgroup = hwgroup; 1083 /* 1084 * Link us into the hwgroup. 1085 * This must be done early, do ensure that unexpected_intr 1086 * can find the hwif and prevent irq storms. 1087 * No drives are attached to the new hwif, choose_drive 1088 * can't do anything stupid (yet). 1089 * Add ourself as the 2nd entry to the hwgroup->hwif 1090 * linked list, the first entry is the hwif that owns 1091 * hwgroup->handler - do not change that. 1092 */ 1093 spin_lock_irq(&ide_lock); 1094 hwif->next = hwgroup->hwif->next; 1095 hwgroup->hwif->next = hwif; 1096 BUG_ON(hwif->next == hwif); 1097 spin_unlock_irq(&ide_lock); 1098 } else { 1099 hwgroup = kmalloc_node(sizeof(*hwgroup), GFP_KERNEL|__GFP_ZERO, 1100 hwif_to_node(hwif)); 1101 if (hwgroup == NULL) 1102 goto out_up; 1103 1104 hwif->hwgroup = hwgroup; 1105 hwgroup->hwif = hwif->next = hwif; 1106 1107 init_timer(&hwgroup->timer); 1108 hwgroup->timer.function = &ide_timer_expiry; 1109 hwgroup->timer.data = (unsigned long) hwgroup; 1110 } 1111 1112 ide_ports[hwif->index] = hwif; 1113 1114 /* 1115 * Allocate the irq, if not already obtained for another hwif 1116 */ 1117 if (!match || match->irq != hwif->irq) { 1118 int sa = 0; 1119#if defined(__mc68000__) 1120 sa = IRQF_SHARED; 1121#endif /* __mc68000__ */ 1122 1123 if (hwif->chipset == ide_pci || hwif->chipset == ide_cmd646 || 1124 hwif->chipset == ide_ali14xx) 1125 sa = IRQF_SHARED; 1126 1127 if (io_ports->ctl_addr) 1128 hwif->tp_ops->set_irq(hwif, 1); 1129 1130 if (request_irq(hwif->irq,&ide_intr,sa,hwif->name,hwgroup)) 1131 goto out_unlink; 1132 } 1133 1134 if (!hwif->rqsize) { 1135 if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) || 1136 (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA)) 1137 hwif->rqsize = 256; 1138 else 1139 hwif->rqsize = 65536; 1140 } 1141 1142#if !defined(__mc68000__) 1143 printk(KERN_INFO "%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name, 1144 io_ports->data_addr, io_ports->status_addr, 1145 io_ports->ctl_addr, hwif->irq); 1146#else 1147 printk(KERN_INFO "%s at 0x%08lx on irq %d", hwif->name, 1148 io_ports->data_addr, hwif->irq); 1149#endif /* __mc68000__ */ 1150 if (match) 1151 printk(KERN_CONT " (%sed with %s)", 1152 hwif->sharing_irq ? "shar" : "serializ", match->name); 1153 printk(KERN_CONT "\n"); 1154 1155 mutex_unlock(&ide_cfg_mtx); 1156 return 0; 1157out_unlink: 1158 ide_remove_port_from_hwgroup(hwif); 1159out_up: 1160 mutex_unlock(&ide_cfg_mtx); 1161 return 1; 1162} 1163 1164static int ata_lock(dev_t dev, void *data) 1165{ 1166 /* FIXME: we want to pin hwif down */ 1167 return 0; 1168} 1169 1170static struct kobject *ata_probe(dev_t dev, int *part, void *data) 1171{ 1172 ide_hwif_t *hwif = data; 1173 int unit = *part >> PARTN_BITS; 1174 ide_drive_t *drive = &hwif->drives[unit]; 1175 1176 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) 1177 return NULL; 1178 1179 if (drive->media == ide_disk) 1180 request_module("ide-disk"); 1181 if (drive->dev_flags & IDE_DFLAG_SCSI) 1182 request_module("ide-scsi"); 1183 if (drive->media == ide_cdrom || drive->media == ide_optical) 1184 request_module("ide-cd"); 1185 if (drive->media == ide_tape) 1186 request_module("ide-tape"); 1187 if (drive->media == ide_floppy) 1188 request_module("ide-floppy"); 1189 1190 return NULL; 1191} 1192 1193static struct kobject *exact_match(dev_t dev, int *part, void *data) 1194{ 1195 struct gendisk *p = data; 1196 *part &= (1 << PARTN_BITS) - 1; 1197 return &disk_to_dev(p)->kobj; 1198} 1199 1200static int exact_lock(dev_t dev, void *data) 1201{ 1202 struct gendisk *p = data; 1203 1204 if (!get_disk(p)) 1205 return -1; 1206 return 0; 1207} 1208 1209void ide_register_region(struct gendisk *disk) 1210{ 1211 blk_register_region(MKDEV(disk->major, disk->first_minor), 1212 disk->minors, NULL, exact_match, exact_lock, disk); 1213} 1214 1215EXPORT_SYMBOL_GPL(ide_register_region); 1216 1217void ide_unregister_region(struct gendisk *disk) 1218{ 1219 blk_unregister_region(MKDEV(disk->major, disk->first_minor), 1220 disk->minors); 1221} 1222 1223EXPORT_SYMBOL_GPL(ide_unregister_region); 1224 1225void ide_init_disk(struct gendisk *disk, ide_drive_t *drive) 1226{ 1227 ide_hwif_t *hwif = drive->hwif; 1228 unsigned int unit = drive->dn & 1; 1229 1230 disk->major = hwif->major; 1231 disk->first_minor = unit << PARTN_BITS; 1232 sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit); 1233 disk->queue = drive->queue; 1234} 1235 1236EXPORT_SYMBOL_GPL(ide_init_disk); 1237 1238static void ide_remove_drive_from_hwgroup(ide_drive_t *drive) 1239{ 1240 ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; 1241 1242 if (drive == drive->next) { 1243 /* special case: last drive from hwgroup. */ 1244 BUG_ON(hwgroup->drive != drive); 1245 hwgroup->drive = NULL; 1246 } else { 1247 ide_drive_t *walk; 1248 1249 walk = hwgroup->drive; 1250 while (walk->next != drive) 1251 walk = walk->next; 1252 walk->next = drive->next; 1253 if (hwgroup->drive == drive) { 1254 hwgroup->drive = drive->next; 1255 hwgroup->hwif = hwgroup->drive->hwif; 1256 } 1257 } 1258 BUG_ON(hwgroup->drive == drive); 1259} 1260 1261static void drive_release_dev (struct device *dev) 1262{ 1263 ide_drive_t *drive = container_of(dev, ide_drive_t, gendev); 1264 1265 ide_proc_unregister_device(drive); 1266 1267 spin_lock_irq(&ide_lock); 1268 ide_remove_drive_from_hwgroup(drive); 1269 kfree(drive->id); 1270 drive->id = NULL; 1271 drive->dev_flags &= ~IDE_DFLAG_PRESENT; 1272 /* Messed up locking ... */ 1273 spin_unlock_irq(&ide_lock); 1274 blk_cleanup_queue(drive->queue); 1275 spin_lock_irq(&ide_lock); 1276 drive->queue = NULL; 1277 spin_unlock_irq(&ide_lock); 1278 1279 complete(&drive->gendev_rel_comp); 1280} 1281 1282static int hwif_init(ide_hwif_t *hwif) 1283{ 1284 int old_irq; 1285 1286 if (!hwif->irq) { 1287 hwif->irq = __ide_default_irq(hwif->io_ports.data_addr); 1288 if (!hwif->irq) { 1289 printk(KERN_ERR "%s: disabled, no IRQ\n", hwif->name); 1290 return 0; 1291 } 1292 } 1293 1294 if (register_blkdev(hwif->major, hwif->name)) 1295 return 0; 1296 1297 if (!hwif->sg_max_nents) 1298 hwif->sg_max_nents = PRD_ENTRIES; 1299 1300 hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents, 1301 GFP_KERNEL); 1302 if (!hwif->sg_table) { 1303 printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name); 1304 goto out; 1305 } 1306 1307 sg_init_table(hwif->sg_table, hwif->sg_max_nents); 1308 1309 if (init_irq(hwif) == 0) 1310 goto done; 1311 1312 old_irq = hwif->irq; 1313 /* 1314 * It failed to initialise. Find the default IRQ for 1315 * this port and try that. 1316 */ 1317 hwif->irq = __ide_default_irq(hwif->io_ports.data_addr); 1318 if (!hwif->irq) { 1319 printk(KERN_ERR "%s: disabled, unable to get IRQ %d\n", 1320 hwif->name, old_irq); 1321 goto out; 1322 } 1323 if (init_irq(hwif)) { 1324 printk(KERN_ERR "%s: probed IRQ %d and default IRQ %d failed\n", 1325 hwif->name, old_irq, hwif->irq); 1326 goto out; 1327 } 1328 printk(KERN_WARNING "%s: probed IRQ %d failed, using default\n", 1329 hwif->name, hwif->irq); 1330 1331done: 1332 blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS, 1333 THIS_MODULE, ata_probe, ata_lock, hwif); 1334 return 1; 1335 1336out: 1337 unregister_blkdev(hwif->major, hwif->name); 1338 return 0; 1339} 1340 1341static void hwif_register_devices(ide_hwif_t *hwif) 1342{ 1343 unsigned int i; 1344 1345 for (i = 0; i < MAX_DRIVES; i++) { 1346 ide_drive_t *drive = &hwif->drives[i]; 1347 struct device *dev = &drive->gendev; 1348 int ret; 1349 1350 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) 1351 continue; 1352 1353 snprintf(dev->bus_id, BUS_ID_SIZE, "%u.%u", hwif->index, i); 1354 dev->parent = &hwif->gendev; 1355 dev->bus = &ide_bus_type; 1356 dev->driver_data = drive; 1357 dev->release = drive_release_dev; 1358 1359 ret = device_register(dev); 1360 if (ret < 0) 1361 printk(KERN_WARNING "IDE: %s: device_register error: " 1362 "%d\n", __func__, ret); 1363 } 1364} 1365 1366static void ide_port_init_devices(ide_hwif_t *hwif) 1367{ 1368 const struct ide_port_ops *port_ops = hwif->port_ops; 1369 int i; 1370 1371 for (i = 0; i < MAX_DRIVES; i++) { 1372 ide_drive_t *drive = &hwif->drives[i]; 1373 1374 drive->dn = i + hwif->channel * 2; 1375 1376 if (hwif->host_flags & IDE_HFLAG_IO_32BIT) 1377 drive->io_32bit = 1; 1378 if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS) 1379 drive->dev_flags |= IDE_DFLAG_UNMASK; 1380 if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS) 1381 drive->dev_flags |= IDE_DFLAG_NO_UNMASK; 1382 1383 if (port_ops && port_ops->init_dev) 1384 port_ops->init_dev(drive); 1385 } 1386} 1387 1388static void ide_init_port(ide_hwif_t *hwif, unsigned int port, 1389 const struct ide_port_info *d) 1390{ 1391 hwif->channel = port; 1392 1393 if (d->chipset) 1394 hwif->chipset = d->chipset; 1395 1396 if (d->init_iops) 1397 d->init_iops(hwif); 1398 1399 if ((!hwif->irq && (d->host_flags & IDE_HFLAG_LEGACY_IRQS)) || 1400 (d->host_flags & IDE_HFLAG_FORCE_LEGACY_IRQS)) 1401 hwif->irq = port ? 15 : 14; 1402 1403 /* ->host_flags may be set by ->init_iops (or even earlier...) */ 1404 hwif->host_flags |= d->host_flags; 1405 hwif->pio_mask = d->pio_mask; 1406 1407 if (d->tp_ops) 1408 hwif->tp_ops = d->tp_ops; 1409 1410 /* ->set_pio_mode for DTC2278 is currently limited to port 0 */ 1411 if (hwif->chipset != ide_dtc2278 || hwif->channel == 0) 1412 hwif->port_ops = d->port_ops; 1413 1414 hwif->swdma_mask = d->swdma_mask; 1415 hwif->mwdma_mask = d->mwdma_mask; 1416 hwif->ultra_mask = d->udma_mask; 1417 1418 if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) { 1419 int rc; 1420 1421 if (d->init_dma) 1422 rc = d->init_dma(hwif, d); 1423 else 1424 rc = ide_hwif_setup_dma(hwif, d); 1425 1426 if (rc < 0) { 1427 printk(KERN_INFO "%s: DMA disabled\n", hwif->name); 1428 hwif->dma_base = 0; 1429 hwif->swdma_mask = 0; 1430 hwif->mwdma_mask = 0; 1431 hwif->ultra_mask = 0; 1432 } else if (d->dma_ops) 1433 hwif->dma_ops = d->dma_ops; 1434 } 1435 1436 if ((d->host_flags & IDE_HFLAG_SERIALIZE) || 1437 ((d->host_flags & IDE_HFLAG_SERIALIZE_DMA) && hwif->dma_base)) { 1438 if (hwif->mate) 1439 hwif->mate->serialized = hwif->serialized = 1; 1440 } 1441 1442 if (d->host_flags & IDE_HFLAG_RQSIZE_256) 1443 hwif->rqsize = 256; 1444 1445 /* call chipset specific routine for each enabled port */ 1446 if (d->init_hwif) 1447 d->init_hwif(hwif); 1448} 1449 1450static void ide_port_cable_detect(ide_hwif_t *hwif) 1451{ 1452 const struct ide_port_ops *port_ops = hwif->port_ops; 1453 1454 if (port_ops && port_ops->cable_detect && (hwif->ultra_mask & 0x78)) { 1455 if (hwif->cbl != ATA_CBL_PATA40_SHORT) 1456 hwif->cbl = port_ops->cable_detect(hwif); 1457 } 1458} 1459 1460static ssize_t store_delete_devices(struct device *portdev, 1461 struct device_attribute *attr, 1462 const char *buf, size_t n) 1463{ 1464 ide_hwif_t *hwif = dev_get_drvdata(portdev); 1465 1466 if (strncmp(buf, "1", n)) 1467 return -EINVAL; 1468 1469 ide_port_unregister_devices(hwif); 1470 1471 return n; 1472}; 1473 1474static DEVICE_ATTR(delete_devices, S_IWUSR, NULL, store_delete_devices); 1475 1476static ssize_t store_scan(struct device *portdev, 1477 struct device_attribute *attr, 1478 const char *buf, size_t n) 1479{ 1480 ide_hwif_t *hwif = dev_get_drvdata(portdev); 1481 1482 if (strncmp(buf, "1", n)) 1483 return -EINVAL; 1484 1485 ide_port_unregister_devices(hwif); 1486 ide_port_scan(hwif); 1487 1488 return n; 1489}; 1490 1491static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan); 1492 1493static struct device_attribute *ide_port_attrs[] = { 1494 &dev_attr_delete_devices, 1495 &dev_attr_scan, 1496 NULL 1497}; 1498 1499static int ide_sysfs_register_port(ide_hwif_t *hwif) 1500{ 1501 int i, uninitialized_var(rc); 1502 1503 for (i = 0; ide_port_attrs[i]; i++) { 1504 rc = device_create_file(hwif->portdev, ide_port_attrs[i]); 1505 if (rc) 1506 break; 1507 } 1508 1509 return rc; 1510} 1511 1512static unsigned int ide_indexes; 1513 1514/** 1515 * ide_find_port_slot - find free port slot 1516 * @d: IDE port info 1517 * 1518 * Return the new port slot index or -ENOENT if we are out of free slots. 1519 */ 1520 1521static int ide_find_port_slot(const struct ide_port_info *d) 1522{ 1523 int idx = -ENOENT; 1524 u8 bootable = (d && (d->host_flags & IDE_HFLAG_NON_BOOTABLE)) ? 0 : 1; 1525 u8 i = (d && (d->host_flags & IDE_HFLAG_QD_2ND_PORT)) ? 1 : 0;; 1526 1527 /* 1528 * Claim an unassigned slot. 1529 * 1530 * Give preference to claiming other slots before claiming ide0/ide1, 1531 * just in case there's another interface yet-to-be-scanned 1532 * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults). 1533 * 1534 * Unless there is a bootable card that does not use the standard 1535 * ports 0x1f0/0x170 (the ide0/ide1 defaults). 1536 */ 1537 mutex_lock(&ide_cfg_mtx); 1538 if (bootable) { 1539 if ((ide_indexes | i) != (1 << MAX_HWIFS) - 1) 1540 idx = ffz(ide_indexes | i); 1541 } else { 1542 if ((ide_indexes | 3) != (1 << MAX_HWIFS) - 1) 1543 idx = ffz(ide_indexes | 3); 1544 else if ((ide_indexes & 3) != 3) 1545 idx = ffz(ide_indexes); 1546 } 1547 if (idx >= 0) 1548 ide_indexes |= (1 << idx); 1549 mutex_unlock(&ide_cfg_mtx); 1550 1551 return idx; 1552} 1553 1554static void ide_free_port_slot(int idx) 1555{ 1556 mutex_lock(&ide_cfg_mtx); 1557 ide_indexes &= ~(1 << idx); 1558 mutex_unlock(&ide_cfg_mtx); 1559} 1560 1561struct ide_host *ide_host_alloc(const struct ide_port_info *d, hw_regs_t **hws) 1562{ 1563 struct ide_host *host; 1564 int i; 1565 1566 host = kzalloc(sizeof(*host), GFP_KERNEL); 1567 if (host == NULL) 1568 return NULL; 1569 1570 for (i = 0; i < MAX_HOST_PORTS; i++) { 1571 ide_hwif_t *hwif; 1572 int idx; 1573 1574 if (hws[i] == NULL) 1575 continue; 1576 1577 hwif = kzalloc(sizeof(*hwif), GFP_KERNEL); 1578 if (hwif == NULL) 1579 continue; 1580 1581 idx = ide_find_port_slot(d); 1582 if (idx < 0) { 1583 printk(KERN_ERR "%s: no free slot for interface\n", 1584 d ? d->name : "ide"); 1585 kfree(hwif); 1586 continue; 1587 } 1588 1589 ide_init_port_data(hwif, idx); 1590 1591 hwif->host = host; 1592 1593 host->ports[i] = hwif; 1594 host->n_ports++; 1595 } 1596 1597 if (host->n_ports == 0) { 1598 kfree(host); 1599 return NULL; 1600 } 1601 1602 if (hws[0]) 1603 host->dev[0] = hws[0]->dev; 1604 1605 if (d) { 1606 host->init_chipset = d->init_chipset; 1607 host->host_flags = d->host_flags; 1608 } 1609 1610 return host; 1611} 1612EXPORT_SYMBOL_GPL(ide_host_alloc); 1613 1614int ide_host_register(struct ide_host *host, const struct ide_port_info *d, 1615 hw_regs_t **hws) 1616{ 1617 ide_hwif_t *hwif, *mate = NULL; 1618 int i, j = 0; 1619 1620 for (i = 0; i < MAX_HOST_PORTS; i++) { 1621 hwif = host->ports[i]; 1622 1623 if (hwif == NULL) { 1624 mate = NULL; 1625 continue; 1626 } 1627 1628 ide_init_port_hw(hwif, hws[i]); 1629 ide_port_apply_params(hwif); 1630 1631 if (d == NULL) { 1632 mate = NULL; 1633 } else { 1634 if ((i & 1) && mate) { 1635 hwif->mate = mate; 1636 mate->mate = hwif; 1637 } 1638 1639 mate = (i & 1) ? NULL : hwif; 1640 1641 ide_init_port(hwif, i & 1, d); 1642 ide_port_cable_detect(hwif); 1643 } 1644 1645 ide_port_init_devices(hwif); 1646 } 1647 1648 for (i = 0; i < MAX_HOST_PORTS; i++) { 1649 hwif = host->ports[i]; 1650 1651 if (hwif == NULL) 1652 continue; 1653 1654 if (ide_probe_port(hwif) == 0) 1655 hwif->present = 1; 1656 1657 if (hwif->chipset != ide_4drives || !hwif->mate || 1658 !hwif->mate->present) 1659 ide_register_port(hwif); 1660 1661 if (hwif->present) 1662 ide_port_tune_devices(hwif); 1663 } 1664 1665 for (i = 0; i < MAX_HOST_PORTS; i++) { 1666 hwif = host->ports[i]; 1667 1668 if (hwif == NULL) 1669 continue; 1670 1671 if (hwif_init(hwif) == 0) { 1672 printk(KERN_INFO "%s: failed to initialize IDE " 1673 "interface\n", hwif->name); 1674 hwif->present = 0; 1675 continue; 1676 } 1677 1678 if (hwif->present) 1679 if (ide_port_setup_devices(hwif) == 0) { 1680 hwif->present = 0; 1681 continue; 1682 } 1683 1684 j++; 1685 1686 ide_acpi_init(hwif); 1687 1688 if (hwif->present) 1689 ide_acpi_port_init_devices(hwif); 1690 } 1691 1692 for (i = 0; i < MAX_HOST_PORTS; i++) { 1693 hwif = host->ports[i]; 1694 1695 if (hwif == NULL) 1696 continue; 1697 1698 if (hwif->chipset == ide_unknown) 1699 hwif->chipset = ide_generic; 1700 1701 if (hwif->present) 1702 hwif_register_devices(hwif); 1703 } 1704 1705 for (i = 0; i < MAX_HOST_PORTS; i++) { 1706 hwif = host->ports[i]; 1707 1708 if (hwif == NULL) 1709 continue; 1710 1711 ide_sysfs_register_port(hwif); 1712 ide_proc_register_port(hwif); 1713 1714 if (hwif->present) 1715 ide_proc_port_register_devices(hwif); 1716 } 1717 1718 return j ? 0 : -1; 1719} 1720EXPORT_SYMBOL_GPL(ide_host_register); 1721 1722int ide_host_add(const struct ide_port_info *d, hw_regs_t **hws, 1723 struct ide_host **hostp) 1724{ 1725 struct ide_host *host; 1726 int rc; 1727 1728 host = ide_host_alloc(d, hws); 1729 if (host == NULL) 1730 return -ENOMEM; 1731 1732 rc = ide_host_register(host, d, hws); 1733 if (rc) { 1734 ide_host_free(host); 1735 return rc; 1736 } 1737 1738 if (hostp) 1739 *hostp = host; 1740 1741 return 0; 1742} 1743EXPORT_SYMBOL_GPL(ide_host_add); 1744 1745void ide_host_free(struct ide_host *host) 1746{ 1747 ide_hwif_t *hwif; 1748 int i; 1749 1750 for (i = 0; i < MAX_HOST_PORTS; i++) { 1751 hwif = host->ports[i]; 1752 1753 if (hwif == NULL) 1754 continue; 1755 1756 ide_free_port_slot(hwif->index); 1757 kfree(hwif); 1758 } 1759 1760 kfree(host); 1761} 1762EXPORT_SYMBOL_GPL(ide_host_free); 1763 1764void ide_host_remove(struct ide_host *host) 1765{ 1766 int i; 1767 1768 for (i = 0; i < MAX_HOST_PORTS; i++) { 1769 if (host->ports[i]) 1770 ide_unregister(host->ports[i]); 1771 } 1772 1773 ide_host_free(host); 1774} 1775EXPORT_SYMBOL_GPL(ide_host_remove); 1776 1777void ide_port_scan(ide_hwif_t *hwif) 1778{ 1779 ide_port_apply_params(hwif); 1780 ide_port_cable_detect(hwif); 1781 ide_port_init_devices(hwif); 1782 1783 if (ide_probe_port(hwif) < 0) 1784 return; 1785 1786 hwif->present = 1; 1787 1788 ide_port_tune_devices(hwif); 1789 ide_acpi_port_init_devices(hwif); 1790 ide_port_setup_devices(hwif); 1791 hwif_register_devices(hwif); 1792 ide_proc_port_register_devices(hwif); 1793} 1794EXPORT_SYMBOL_GPL(ide_port_scan); 1795 1796static void ide_legacy_init_one(hw_regs_t **hws, hw_regs_t *hw, 1797 u8 port_no, const struct ide_port_info *d, 1798 unsigned long config) 1799{ 1800 unsigned long base, ctl; 1801 int irq; 1802 1803 if (port_no == 0) { 1804 base = 0x1f0; 1805 ctl = 0x3f6; 1806 irq = 14; 1807 } else { 1808 base = 0x170; 1809 ctl = 0x376; 1810 irq = 15; 1811 } 1812 1813 if (!request_region(base, 8, d->name)) { 1814 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n", 1815 d->name, base, base + 7); 1816 return; 1817 } 1818 1819 if (!request_region(ctl, 1, d->name)) { 1820 printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n", 1821 d->name, ctl); 1822 release_region(base, 8); 1823 return; 1824 } 1825 1826 ide_std_init_ports(hw, base, ctl); 1827 hw->irq = irq; 1828 hw->chipset = d->chipset; 1829 hw->config = config; 1830 1831 hws[port_no] = hw; 1832} 1833 1834int ide_legacy_device_add(const struct ide_port_info *d, unsigned long config) 1835{ 1836 hw_regs_t hw[2], *hws[] = { NULL, NULL, NULL, NULL }; 1837 1838 memset(&hw, 0, sizeof(hw)); 1839 1840 if ((d->host_flags & IDE_HFLAG_QD_2ND_PORT) == 0) 1841 ide_legacy_init_one(hws, &hw[0], 0, d, config); 1842 ide_legacy_init_one(hws, &hw[1], 1, d, config); 1843 1844 if (hws[0] == NULL && hws[1] == NULL && 1845 (d->host_flags & IDE_HFLAG_SINGLE)) 1846 return -ENOENT; 1847 1848 return ide_host_add(d, hws, NULL); 1849} 1850EXPORT_SYMBOL_GPL(ide_legacy_device_add); 1851