ide-probe.c revision feb22b7f8e62b1b987a3a1dbad95af767a1df832
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->id_read = 1; 125 local_irq_enable(); 126#ifdef DEBUG 127 printk(KERN_INFO "%s: dumping identify data\n", drive->name); 128 ide_dump_identify((u8 *)id); 129#endif 130 ide_fix_driveid(id); 131 132 /* 133 * ATA_CMD_ID_ATA returns little-endian info, 134 * ATA_CMD_ID_ATAPI *usually* returns little-endian info. 135 */ 136 if (cmd == ATA_CMD_ID_ATAPI) { 137 if ((m[0] == 'N' && m[1] == 'E') || /* NEC */ 138 (m[0] == 'F' && m[1] == 'X') || /* Mitsumi */ 139 (m[0] == 'P' && m[1] == 'i')) /* Pioneer */ 140 /* Vertos drives may still be weird */ 141 bswap ^= 1; 142 } 143 144 ide_fixstring(m, ATA_ID_PROD_LEN, bswap); 145 ide_fixstring((char *)&id[ATA_ID_FW_REV], ATA_ID_FW_REV_LEN, bswap); 146 ide_fixstring((char *)&id[ATA_ID_SERNO], ATA_ID_SERNO_LEN, bswap); 147 148 /* we depend on this a lot! */ 149 m[ATA_ID_PROD_LEN - 1] = '\0'; 150 151 if (strstr(m, "E X A B Y T E N E S T")) 152 goto err_misc; 153 154 printk(KERN_INFO "%s: %s, ", drive->name, m); 155 156 drive->present = 1; 157 drive->dead = 0; 158 159 /* 160 * Check for an ATAPI device 161 */ 162 if (cmd == ATA_CMD_ID_ATAPI) { 163 u8 type = (id[ATA_ID_CONFIG] >> 8) & 0x1f; 164 165 printk(KERN_CONT "ATAPI "); 166 switch (type) { 167 case ide_floppy: 168 if (!strstr(m, "CD-ROM")) { 169 if (!strstr(m, "oppy") && 170 !strstr(m, "poyp") && 171 !strstr(m, "ZIP")) 172 printk(KERN_CONT "cdrom or floppy?, assuming "); 173 if (drive->media != ide_cdrom) { 174 printk(KERN_CONT "FLOPPY"); 175 drive->removable = 1; 176 break; 177 } 178 } 179 /* Early cdrom models used zero */ 180 type = ide_cdrom; 181 case ide_cdrom: 182 drive->removable = 1; 183#ifdef CONFIG_PPC 184 /* kludge for Apple PowerBook internal zip */ 185 if (!strstr(m, "CD-ROM") && strstr(m, "ZIP")) { 186 printk(KERN_CONT "FLOPPY"); 187 type = ide_floppy; 188 break; 189 } 190#endif 191 printk(KERN_CONT "CD/DVD-ROM"); 192 break; 193 case ide_tape: 194 printk(KERN_CONT "TAPE"); 195 break; 196 case ide_optical: 197 printk(KERN_CONT "OPTICAL"); 198 drive->removable = 1; 199 break; 200 default: 201 printk(KERN_CONT "UNKNOWN (type %d)", type); 202 break; 203 } 204 printk(KERN_CONT " drive\n"); 205 drive->media = type; 206 /* an ATAPI device ignores DRDY */ 207 drive->ready_stat = 0; 208 return; 209 } 210 211 /* 212 * Not an ATAPI device: looks like a "regular" hard disk 213 */ 214 215 is_cfa = ata_id_is_cfa(id); 216 217 /* CF devices are *not* removable in Linux definition of the term */ 218 if (is_cfa == 0 && (id[ATA_ID_CONFIG] & (1 << 7))) 219 drive->removable = 1; 220 221 drive->media = ide_disk; 222 223 printk(KERN_CONT "%s DISK drive\n", is_cfa ? "CFA" : "ATA"); 224 225 return; 226 227err_misc: 228 kfree(id); 229 drive->present = 0; 230 return; 231} 232 233/** 234 * actual_try_to_identify - send ata/atapi identify 235 * @drive: drive to identify 236 * @cmd: command to use 237 * 238 * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive 239 * and waits for a response. It also monitors irqs while this is 240 * happening, in hope of automatically determining which one is 241 * being used by the interface. 242 * 243 * Returns: 0 device was identified 244 * 1 device timed-out (no response to identify request) 245 * 2 device aborted the command (refused to identify itself) 246 */ 247 248static int actual_try_to_identify (ide_drive_t *drive, u8 cmd) 249{ 250 ide_hwif_t *hwif = HWIF(drive); 251 struct ide_io_ports *io_ports = &hwif->io_ports; 252 const struct ide_tp_ops *tp_ops = hwif->tp_ops; 253 int use_altstatus = 0, rc; 254 unsigned long timeout; 255 u8 s = 0, a = 0; 256 257 /* take a deep breath */ 258 msleep(50); 259 260 if (io_ports->ctl_addr) { 261 a = tp_ops->read_altstatus(hwif); 262 s = tp_ops->read_status(hwif); 263 if ((a ^ s) & ~ATA_IDX) 264 /* ancient Seagate drives, broken interfaces */ 265 printk(KERN_INFO "%s: probing with STATUS(0x%02x) " 266 "instead of ALTSTATUS(0x%02x)\n", 267 drive->name, s, a); 268 else 269 /* use non-intrusive polling */ 270 use_altstatus = 1; 271 } 272 273 /* set features register for atapi 274 * identify command to be sure of reply 275 */ 276 if (cmd == ATA_CMD_ID_ATAPI) { 277 ide_task_t task; 278 279 memset(&task, 0, sizeof(task)); 280 /* disable DMA & overlap */ 281 task.tf_flags = IDE_TFLAG_OUT_FEATURE; 282 283 tp_ops->tf_load(drive, &task); 284 } 285 286 /* ask drive for ID */ 287 tp_ops->exec_command(hwif, cmd); 288 289 timeout = ((cmd == ATA_CMD_ID_ATA) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2; 290 291 if (ide_busy_sleep(hwif, timeout, use_altstatus)) 292 return 1; 293 294 /* wait for IRQ and ATA_DRQ */ 295 msleep(50); 296 s = tp_ops->read_status(hwif); 297 298 if (OK_STAT(s, ATA_DRQ, BAD_R_STAT)) { 299 unsigned long flags; 300 301 /* local CPU only; some systems need this */ 302 local_irq_save(flags); 303 /* drive returned ID */ 304 do_identify(drive, cmd); 305 /* drive responded with ID */ 306 rc = 0; 307 /* clear drive IRQ */ 308 (void)tp_ops->read_status(hwif); 309 local_irq_restore(flags); 310 } else { 311 /* drive refused ID */ 312 rc = 2; 313 } 314 return rc; 315} 316 317/** 318 * try_to_identify - try to identify a drive 319 * @drive: drive to probe 320 * @cmd: command to use 321 * 322 * Issue the identify command and then do IRQ probing to 323 * complete the identification when needed by finding the 324 * IRQ the drive is attached to 325 */ 326 327static int try_to_identify (ide_drive_t *drive, u8 cmd) 328{ 329 ide_hwif_t *hwif = HWIF(drive); 330 const struct ide_tp_ops *tp_ops = hwif->tp_ops; 331 int retval; 332 int autoprobe = 0; 333 unsigned long cookie = 0; 334 335 /* 336 * Disable device irq unless we need to 337 * probe for it. Otherwise we'll get spurious 338 * interrupts during the identify-phase that 339 * the irq handler isn't expecting. 340 */ 341 if (hwif->io_ports.ctl_addr) { 342 if (!hwif->irq) { 343 autoprobe = 1; 344 cookie = probe_irq_on(); 345 } 346 tp_ops->set_irq(hwif, autoprobe); 347 } 348 349 retval = actual_try_to_identify(drive, cmd); 350 351 if (autoprobe) { 352 int irq; 353 354 tp_ops->set_irq(hwif, 0); 355 /* clear drive IRQ */ 356 (void)tp_ops->read_status(hwif); 357 udelay(5); 358 irq = probe_irq_off(cookie); 359 if (!hwif->irq) { 360 if (irq > 0) { 361 hwif->irq = irq; 362 } else { 363 /* Mmmm.. multiple IRQs.. 364 * don't know which was ours 365 */ 366 printk(KERN_ERR "%s: IRQ probe failed (0x%lx)\n", 367 drive->name, cookie); 368 } 369 } 370 } 371 return retval; 372} 373 374int ide_busy_sleep(ide_hwif_t *hwif, unsigned long timeout, int altstatus) 375{ 376 u8 stat; 377 378 timeout += jiffies; 379 380 do { 381 msleep(50); /* give drive a breather */ 382 stat = altstatus ? hwif->tp_ops->read_altstatus(hwif) 383 : hwif->tp_ops->read_status(hwif); 384 if ((stat & ATA_BUSY) == 0) 385 return 0; 386 } while (time_before(jiffies, timeout)); 387 388 return 1; /* drive timed-out */ 389} 390 391static u8 ide_read_device(ide_drive_t *drive) 392{ 393 ide_task_t task; 394 395 memset(&task, 0, sizeof(task)); 396 task.tf_flags = IDE_TFLAG_IN_DEVICE; 397 398 drive->hwif->tp_ops->tf_read(drive, &task); 399 400 return task.tf.device; 401} 402 403/** 404 * do_probe - probe an IDE device 405 * @drive: drive to probe 406 * @cmd: command to use 407 * 408 * do_probe() has the difficult job of finding a drive if it exists, 409 * without getting hung up if it doesn't exist, without trampling on 410 * ethernet cards, and without leaving any IRQs dangling to haunt us later. 411 * 412 * If a drive is "known" to exist (from CMOS or kernel parameters), 413 * but does not respond right away, the probe will "hang in there" 414 * for the maximum wait time (about 30 seconds), otherwise it will 415 * exit much more quickly. 416 * 417 * Returns: 0 device was identified 418 * 1 device timed-out (no response to identify request) 419 * 2 device aborted the command (refused to identify itself) 420 * 3 bad status from device (possible for ATAPI drives) 421 * 4 probe was not attempted because failure was obvious 422 */ 423 424static int do_probe (ide_drive_t *drive, u8 cmd) 425{ 426 ide_hwif_t *hwif = HWIF(drive); 427 const struct ide_tp_ops *tp_ops = hwif->tp_ops; 428 int rc; 429 u8 stat; 430 431 if (drive->present) { 432 /* avoid waiting for inappropriate probes */ 433 if (drive->media != ide_disk && cmd == ATA_CMD_ID_ATA) 434 return 4; 435 } 436#ifdef DEBUG 437 printk(KERN_INFO "probing for %s: present=%d, media=%d, probetype=%s\n", 438 drive->name, drive->present, drive->media, 439 (cmd == ATA_CMD_ID_ATA) ? "ATA" : "ATAPI"); 440#endif 441 442 /* needed for some systems 443 * (e.g. crw9624 as drive0 with disk as slave) 444 */ 445 msleep(50); 446 SELECT_DRIVE(drive); 447 msleep(50); 448 449 if (ide_read_device(drive) != drive->select.all && !drive->present) { 450 if (drive->select.b.unit != 0) { 451 /* exit with drive0 selected */ 452 SELECT_DRIVE(&hwif->drives[0]); 453 /* allow ATA_BUSY to assert & clear */ 454 msleep(50); 455 } 456 /* no i/f present: mmm.. this should be a 4 -ml */ 457 return 3; 458 } 459 460 stat = tp_ops->read_status(hwif); 461 462 if (OK_STAT(stat, ATA_DRDY, ATA_BUSY) || 463 drive->present || cmd == ATA_CMD_ID_ATAPI) { 464 /* send cmd and wait */ 465 if ((rc = try_to_identify(drive, cmd))) { 466 /* failed: try again */ 467 rc = try_to_identify(drive,cmd); 468 } 469 470 stat = tp_ops->read_status(hwif); 471 472 if (stat == (ATA_BUSY | ATA_DRDY)) 473 return 4; 474 475 if (rc == 1 && cmd == ATA_CMD_ID_ATAPI) { 476 printk(KERN_ERR "%s: no response (status = 0x%02x), " 477 "resetting drive\n", drive->name, stat); 478 msleep(50); 479 SELECT_DRIVE(drive); 480 msleep(50); 481 tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET); 482 (void)ide_busy_sleep(hwif, WAIT_WORSTCASE, 0); 483 rc = try_to_identify(drive, cmd); 484 } 485 486 /* ensure drive IRQ is clear */ 487 stat = tp_ops->read_status(hwif); 488 489 if (rc == 1) 490 printk(KERN_ERR "%s: no response (status = 0x%02x)\n", 491 drive->name, stat); 492 } else { 493 /* not present or maybe ATAPI */ 494 rc = 3; 495 } 496 if (drive->select.b.unit != 0) { 497 /* exit with drive0 selected */ 498 SELECT_DRIVE(&hwif->drives[0]); 499 msleep(50); 500 /* ensure drive irq is clear */ 501 (void)tp_ops->read_status(hwif); 502 } 503 return rc; 504} 505 506/* 507 * 508 */ 509static void enable_nest (ide_drive_t *drive) 510{ 511 ide_hwif_t *hwif = HWIF(drive); 512 const struct ide_tp_ops *tp_ops = hwif->tp_ops; 513 u8 stat; 514 515 printk(KERN_INFO "%s: enabling %s -- ", 516 hwif->name, (char *)&drive->id[ATA_ID_PROD]); 517 518 SELECT_DRIVE(drive); 519 msleep(50); 520 tp_ops->exec_command(hwif, ATA_EXABYTE_ENABLE_NEST); 521 522 if (ide_busy_sleep(hwif, WAIT_WORSTCASE, 0)) { 523 printk(KERN_CONT "failed (timeout)\n"); 524 return; 525 } 526 527 msleep(50); 528 529 stat = tp_ops->read_status(hwif); 530 531 if (!OK_STAT(stat, 0, BAD_STAT)) 532 printk(KERN_CONT "failed (status = 0x%02x)\n", stat); 533 else 534 printk(KERN_CONT "success\n"); 535} 536 537/** 538 * probe_for_drives - upper level drive probe 539 * @drive: drive to probe for 540 * 541 * probe_for_drive() tests for existence of a given drive using do_probe() 542 * and presents things to the user as needed. 543 * 544 * Returns: 0 no device was found 545 * 1 device was found (note: drive->present might 546 * still be 0) 547 */ 548 549static inline u8 probe_for_drive (ide_drive_t *drive) 550{ 551 char *m; 552 553 /* 554 * In order to keep things simple we have an id 555 * block for all drives at all times. If the device 556 * is pre ATA or refuses ATA/ATAPI identify we 557 * will add faked data to this. 558 * 559 * Also note that 0 everywhere means "can't do X" 560 */ 561 562 drive->id = kzalloc(SECTOR_SIZE, GFP_KERNEL); 563 drive->id_read = 0; 564 if(drive->id == NULL) 565 { 566 printk(KERN_ERR "ide: out of memory for id data.\n"); 567 return 0; 568 } 569 570 m = (char *)&drive->id[ATA_ID_PROD]; 571 strcpy(m, "UNKNOWN"); 572 573 /* skip probing? */ 574 if (!drive->noprobe) { 575retry: 576 /* if !(success||timed-out) */ 577 if (do_probe(drive, ATA_CMD_ID_ATA) >= 2) 578 /* look for ATAPI device */ 579 (void)do_probe(drive, ATA_CMD_ID_ATAPI); 580 581 if (!drive->present) 582 /* drive not found */ 583 return 0; 584 585 if (strstr(m, "E X A B Y T E N E S T")) { 586 enable_nest(drive); 587 goto retry; 588 } 589 590 /* identification failed? */ 591 if (!drive->id_read) { 592 if (drive->media == ide_disk) { 593 printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n", 594 drive->name, drive->cyl, 595 drive->head, drive->sect); 596 } else if (drive->media == ide_cdrom) { 597 printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name); 598 } else { 599 /* nuke it */ 600 printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name); 601 drive->present = 0; 602 } 603 } 604 /* drive was found */ 605 } 606 if(!drive->present) 607 return 0; 608 /* The drive wasn't being helpful. Add generic info only */ 609 if (drive->id_read == 0) { 610 generic_id(drive); 611 return 1; 612 } 613 614 if (drive->media == ide_disk) { 615 ide_disk_init_chs(drive); 616 ide_disk_init_mult_count(drive); 617 } 618 619 return drive->present; 620} 621 622static void hwif_release_dev(struct device *dev) 623{ 624 ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev); 625 626 complete(&hwif->gendev_rel_comp); 627} 628 629static int ide_register_port(ide_hwif_t *hwif) 630{ 631 int ret; 632 633 /* register with global device tree */ 634 strlcpy(hwif->gendev.bus_id,hwif->name,BUS_ID_SIZE); 635 hwif->gendev.driver_data = hwif; 636 if (hwif->gendev.parent == NULL) { 637 if (hwif->dev) 638 hwif->gendev.parent = hwif->dev; 639 else 640 /* Would like to do = &device_legacy */ 641 hwif->gendev.parent = NULL; 642 } 643 hwif->gendev.release = hwif_release_dev; 644 ret = device_register(&hwif->gendev); 645 if (ret < 0) { 646 printk(KERN_WARNING "IDE: %s: device_register error: %d\n", 647 __func__, ret); 648 goto out; 649 } 650 651 hwif->portdev = device_create_drvdata(ide_port_class, &hwif->gendev, 652 MKDEV(0, 0), hwif, hwif->name); 653 if (IS_ERR(hwif->portdev)) { 654 ret = PTR_ERR(hwif->portdev); 655 device_unregister(&hwif->gendev); 656 } 657out: 658 return ret; 659} 660 661/** 662 * ide_port_wait_ready - wait for port to become ready 663 * @hwif: IDE port 664 * 665 * This is needed on some PPCs and a bunch of BIOS-less embedded 666 * platforms. Typical cases are: 667 * 668 * - The firmware hard reset the disk before booting the kernel, 669 * the drive is still doing it's poweron-reset sequence, that 670 * can take up to 30 seconds. 671 * 672 * - The firmware does nothing (or no firmware), the device is 673 * still in POST state (same as above actually). 674 * 675 * - Some CD/DVD/Writer combo drives tend to drive the bus during 676 * their reset sequence even when they are non-selected slave 677 * devices, thus preventing discovery of the main HD. 678 * 679 * Doing this wait-for-non-busy should not harm any existing 680 * configuration and fix some issues like the above. 681 * 682 * BenH. 683 * 684 * Returns 0 on success, error code (< 0) otherwise. 685 */ 686 687static int ide_port_wait_ready(ide_hwif_t *hwif) 688{ 689 int unit, rc; 690 691 printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name); 692 693 /* Let HW settle down a bit from whatever init state we 694 * come from */ 695 mdelay(2); 696 697 /* Wait for BSY bit to go away, spec timeout is 30 seconds, 698 * I know of at least one disk who takes 31 seconds, I use 35 699 * here to be safe 700 */ 701 rc = ide_wait_not_busy(hwif, 35000); 702 if (rc) 703 return rc; 704 705 /* Now make sure both master & slave are ready */ 706 for (unit = 0; unit < MAX_DRIVES; unit++) { 707 ide_drive_t *drive = &hwif->drives[unit]; 708 709 /* Ignore disks that we will not probe for later. */ 710 if (!drive->noprobe || drive->present) { 711 SELECT_DRIVE(drive); 712 hwif->tp_ops->set_irq(hwif, 1); 713 mdelay(2); 714 rc = ide_wait_not_busy(hwif, 35000); 715 if (rc) 716 goto out; 717 } else 718 printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n", 719 drive->name); 720 } 721out: 722 /* Exit function with master reselected (let's be sane) */ 723 if (unit) 724 SELECT_DRIVE(&hwif->drives[0]); 725 726 return rc; 727} 728 729/** 730 * ide_undecoded_slave - look for bad CF adapters 731 * @dev1: slave device 732 * 733 * Analyse the drives on the interface and attempt to decide if we 734 * have the same drive viewed twice. This occurs with crap CF adapters 735 * and PCMCIA sometimes. 736 */ 737 738void ide_undecoded_slave(ide_drive_t *dev1) 739{ 740 ide_drive_t *dev0 = &dev1->hwif->drives[0]; 741 742 if ((dev1->dn & 1) == 0 || dev0->present == 0) 743 return; 744 745 /* If the models don't match they are not the same product */ 746 if (strcmp((char *)&dev0->id[ATA_ID_PROD], 747 (char *)&dev1->id[ATA_ID_PROD])) 748 return; 749 750 /* Serial numbers do not match */ 751 if (strncmp((char *)&dev0->id[ATA_ID_SERNO], 752 (char *)&dev1->id[ATA_ID_SERNO], ATA_ID_SERNO_LEN)) 753 return; 754 755 /* No serial number, thankfully very rare for CF */ 756 if (*(char *)&dev0->id[ATA_ID_SERNO] == 0) 757 return; 758 759 /* Appears to be an IDE flash adapter with decode bugs */ 760 printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n"); 761 762 dev1->present = 0; 763} 764 765EXPORT_SYMBOL_GPL(ide_undecoded_slave); 766 767static int ide_probe_port(ide_hwif_t *hwif) 768{ 769 unsigned long flags; 770 unsigned int irqd; 771 int unit, rc = -ENODEV; 772 773 BUG_ON(hwif->present); 774 775 if (hwif->drives[0].noprobe && hwif->drives[1].noprobe) 776 return -EACCES; 777 778 /* 779 * We must always disable IRQ, as probe_for_drive will assert IRQ, but 780 * we'll install our IRQ driver much later... 781 */ 782 irqd = hwif->irq; 783 if (irqd) 784 disable_irq(hwif->irq); 785 786 local_irq_set(flags); 787 788 if (ide_port_wait_ready(hwif) == -EBUSY) 789 printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name); 790 791 /* 792 * Second drive should only exist if first drive was found, 793 * but a lot of cdrom drives are configured as single slaves. 794 */ 795 for (unit = 0; unit < MAX_DRIVES; ++unit) { 796 ide_drive_t *drive = &hwif->drives[unit]; 797 drive->dn = (hwif->channel ? 2 : 0) + unit; 798 (void) probe_for_drive(drive); 799 if (drive->present) 800 rc = 0; 801 } 802 803 local_irq_restore(flags); 804 805 /* 806 * Use cached IRQ number. It might be (and is...) changed by probe 807 * code above 808 */ 809 if (irqd) 810 enable_irq(irqd); 811 812 return rc; 813} 814 815static void ide_port_tune_devices(ide_hwif_t *hwif) 816{ 817 const struct ide_port_ops *port_ops = hwif->port_ops; 818 int unit; 819 820 for (unit = 0; unit < MAX_DRIVES; unit++) { 821 ide_drive_t *drive = &hwif->drives[unit]; 822 823 if (drive->present && port_ops && port_ops->quirkproc) 824 port_ops->quirkproc(drive); 825 } 826 827 for (unit = 0; unit < MAX_DRIVES; ++unit) { 828 ide_drive_t *drive = &hwif->drives[unit]; 829 830 if (drive->present) { 831 ide_set_max_pio(drive); 832 833 drive->nice1 = 1; 834 835 if (hwif->dma_ops) 836 ide_set_dma(drive); 837 } 838 } 839 840 for (unit = 0; unit < MAX_DRIVES; ++unit) { 841 ide_drive_t *drive = &hwif->drives[unit]; 842 843 if (hwif->host_flags & IDE_HFLAG_NO_IO_32BIT) 844 drive->no_io_32bit = 1; 845 else 846 drive->no_io_32bit = drive->id[ATA_ID_DWORD_IO] ? 1 : 0; 847 } 848} 849 850#if MAX_HWIFS > 1 851/* 852 * save_match() is used to simplify logic in init_irq() below. 853 * 854 * A loophole here is that we may not know about a particular 855 * hwif's irq until after that hwif is actually probed/initialized.. 856 * This could be a problem for the case where an hwif is on a 857 * dual interface that requires serialization (eg. cmd640) and another 858 * hwif using one of the same irqs is initialized beforehand. 859 * 860 * This routine detects and reports such situations, but does not fix them. 861 */ 862static void save_match(ide_hwif_t *hwif, ide_hwif_t *new, ide_hwif_t **match) 863{ 864 ide_hwif_t *m = *match; 865 866 if (m && m->hwgroup && m->hwgroup != new->hwgroup) { 867 if (!new->hwgroup) 868 return; 869 printk(KERN_WARNING "%s: potential IRQ problem with %s and %s\n", 870 hwif->name, new->name, m->name); 871 } 872 if (!m || m->irq != hwif->irq) /* don't undo a prior perfect match */ 873 *match = new; 874} 875#endif /* MAX_HWIFS > 1 */ 876 877/* 878 * init request queue 879 */ 880static int ide_init_queue(ide_drive_t *drive) 881{ 882 struct request_queue *q; 883 ide_hwif_t *hwif = HWIF(drive); 884 int max_sectors = 256; 885 int max_sg_entries = PRD_ENTRIES; 886 887 /* 888 * Our default set up assumes the normal IDE case, 889 * that is 64K segmenting, standard PRD setup 890 * and LBA28. Some drivers then impose their own 891 * limits and LBA48 we could raise it but as yet 892 * do not. 893 */ 894 895 q = blk_init_queue_node(do_ide_request, &ide_lock, hwif_to_node(hwif)); 896 if (!q) 897 return 1; 898 899 q->queuedata = drive; 900 blk_queue_segment_boundary(q, 0xffff); 901 902 if (hwif->rqsize < max_sectors) 903 max_sectors = hwif->rqsize; 904 blk_queue_max_sectors(q, max_sectors); 905 906#ifdef CONFIG_PCI 907 /* When we have an IOMMU, we may have a problem where pci_map_sg() 908 * creates segments that don't completely match our boundary 909 * requirements and thus need to be broken up again. Because it 910 * doesn't align properly either, we may actually have to break up 911 * to more segments than what was we got in the first place, a max 912 * worst case is twice as many. 913 * This will be fixed once we teach pci_map_sg() about our boundary 914 * requirements, hopefully soon. *FIXME* 915 */ 916 if (!PCI_DMA_BUS_IS_PHYS) 917 max_sg_entries >>= 1; 918#endif /* CONFIG_PCI */ 919 920 blk_queue_max_hw_segments(q, max_sg_entries); 921 blk_queue_max_phys_segments(q, max_sg_entries); 922 923 /* assign drive queue */ 924 drive->queue = q; 925 926 /* needs drive->queue to be set */ 927 ide_toggle_bounce(drive, 1); 928 929 return 0; 930} 931 932static void ide_add_drive_to_hwgroup(ide_drive_t *drive) 933{ 934 ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; 935 936 spin_lock_irq(&ide_lock); 937 if (!hwgroup->drive) { 938 /* first drive for hwgroup. */ 939 drive->next = drive; 940 hwgroup->drive = drive; 941 hwgroup->hwif = HWIF(hwgroup->drive); 942 } else { 943 drive->next = hwgroup->drive->next; 944 hwgroup->drive->next = drive; 945 } 946 spin_unlock_irq(&ide_lock); 947} 948 949/* 950 * For any present drive: 951 * - allocate the block device queue 952 * - link drive into the hwgroup 953 */ 954static void ide_port_setup_devices(ide_hwif_t *hwif) 955{ 956 int i; 957 958 mutex_lock(&ide_cfg_mtx); 959 for (i = 0; i < MAX_DRIVES; i++) { 960 ide_drive_t *drive = &hwif->drives[i]; 961 962 if (!drive->present) 963 continue; 964 965 if (ide_init_queue(drive)) { 966 printk(KERN_ERR "ide: failed to init %s\n", 967 drive->name); 968 continue; 969 } 970 971 ide_add_drive_to_hwgroup(drive); 972 } 973 mutex_unlock(&ide_cfg_mtx); 974} 975 976static ide_hwif_t *ide_ports[MAX_HWIFS]; 977 978void ide_remove_port_from_hwgroup(ide_hwif_t *hwif) 979{ 980 ide_hwgroup_t *hwgroup = hwif->hwgroup; 981 982 ide_ports[hwif->index] = NULL; 983 984 spin_lock_irq(&ide_lock); 985 /* 986 * Remove us from the hwgroup, and free 987 * the hwgroup if we were the only member 988 */ 989 if (hwif->next == hwif) { 990 BUG_ON(hwgroup->hwif != hwif); 991 kfree(hwgroup); 992 } else { 993 /* There is another interface in hwgroup. 994 * Unlink us, and set hwgroup->drive and ->hwif to 995 * something sane. 996 */ 997 ide_hwif_t *g = hwgroup->hwif; 998 999 while (g->next != hwif) 1000 g = g->next; 1001 g->next = hwif->next; 1002 if (hwgroup->hwif == hwif) { 1003 /* Chose a random hwif for hwgroup->hwif. 1004 * It's guaranteed that there are no drives 1005 * left in the hwgroup. 1006 */ 1007 BUG_ON(hwgroup->drive != NULL); 1008 hwgroup->hwif = g; 1009 } 1010 BUG_ON(hwgroup->hwif == hwif); 1011 } 1012 spin_unlock_irq(&ide_lock); 1013} 1014 1015/* 1016 * This routine sets up the irq for an ide interface, and creates a new 1017 * hwgroup for the irq/hwif if none was previously assigned. 1018 * 1019 * Much of the code is for correctly detecting/handling irq sharing 1020 * and irq serialization situations. This is somewhat complex because 1021 * it handles static as well as dynamic (PCMCIA) IDE interfaces. 1022 */ 1023static int init_irq (ide_hwif_t *hwif) 1024{ 1025 struct ide_io_ports *io_ports = &hwif->io_ports; 1026 unsigned int index; 1027 ide_hwgroup_t *hwgroup; 1028 ide_hwif_t *match = NULL; 1029 1030 mutex_lock(&ide_cfg_mtx); 1031 hwif->hwgroup = NULL; 1032#if MAX_HWIFS > 1 1033 /* 1034 * Group up with any other hwifs that share our irq(s). 1035 */ 1036 for (index = 0; index < MAX_HWIFS; index++) { 1037 ide_hwif_t *h = ide_ports[index]; 1038 1039 if (h && h->hwgroup) { /* scan only initialized ports */ 1040 if (hwif->irq == h->irq) { 1041 hwif->sharing_irq = h->sharing_irq = 1; 1042 if (hwif->chipset != ide_pci || 1043 h->chipset != ide_pci) { 1044 save_match(hwif, h, &match); 1045 } 1046 } 1047 if (hwif->serialized) { 1048 if (hwif->mate && hwif->mate->irq == h->irq) 1049 save_match(hwif, h, &match); 1050 } 1051 if (h->serialized) { 1052 if (h->mate && hwif->irq == h->mate->irq) 1053 save_match(hwif, h, &match); 1054 } 1055 } 1056 } 1057#endif /* MAX_HWIFS > 1 */ 1058 /* 1059 * If we are still without a hwgroup, then form a new one 1060 */ 1061 if (match) { 1062 hwgroup = match->hwgroup; 1063 hwif->hwgroup = hwgroup; 1064 /* 1065 * Link us into the hwgroup. 1066 * This must be done early, do ensure that unexpected_intr 1067 * can find the hwif and prevent irq storms. 1068 * No drives are attached to the new hwif, choose_drive 1069 * can't do anything stupid (yet). 1070 * Add ourself as the 2nd entry to the hwgroup->hwif 1071 * linked list, the first entry is the hwif that owns 1072 * hwgroup->handler - do not change that. 1073 */ 1074 spin_lock_irq(&ide_lock); 1075 hwif->next = hwgroup->hwif->next; 1076 hwgroup->hwif->next = hwif; 1077 BUG_ON(hwif->next == hwif); 1078 spin_unlock_irq(&ide_lock); 1079 } else { 1080 hwgroup = kmalloc_node(sizeof(*hwgroup), GFP_KERNEL|__GFP_ZERO, 1081 hwif_to_node(hwif)); 1082 if (hwgroup == NULL) 1083 goto out_up; 1084 1085 hwif->hwgroup = hwgroup; 1086 hwgroup->hwif = hwif->next = hwif; 1087 1088 init_timer(&hwgroup->timer); 1089 hwgroup->timer.function = &ide_timer_expiry; 1090 hwgroup->timer.data = (unsigned long) hwgroup; 1091 } 1092 1093 ide_ports[hwif->index] = hwif; 1094 1095 /* 1096 * Allocate the irq, if not already obtained for another hwif 1097 */ 1098 if (!match || match->irq != hwif->irq) { 1099 int sa = 0; 1100#if defined(__mc68000__) 1101 sa = IRQF_SHARED; 1102#endif /* __mc68000__ */ 1103 1104 if (hwif->chipset == ide_pci || hwif->chipset == ide_cmd646 || 1105 hwif->chipset == ide_ali14xx) 1106 sa = IRQF_SHARED; 1107 1108 if (io_ports->ctl_addr) 1109 hwif->tp_ops->set_irq(hwif, 1); 1110 1111 if (request_irq(hwif->irq,&ide_intr,sa,hwif->name,hwgroup)) 1112 goto out_unlink; 1113 } 1114 1115 if (!hwif->rqsize) { 1116 if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) || 1117 (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA)) 1118 hwif->rqsize = 256; 1119 else 1120 hwif->rqsize = 65536; 1121 } 1122 1123#if !defined(__mc68000__) 1124 printk(KERN_INFO "%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name, 1125 io_ports->data_addr, io_ports->status_addr, 1126 io_ports->ctl_addr, hwif->irq); 1127#else 1128 printk(KERN_INFO "%s at 0x%08lx on irq %d", hwif->name, 1129 io_ports->data_addr, hwif->irq); 1130#endif /* __mc68000__ */ 1131 if (match) 1132 printk(KERN_CONT " (%sed with %s)", 1133 hwif->sharing_irq ? "shar" : "serializ", match->name); 1134 printk(KERN_CONT "\n"); 1135 1136 mutex_unlock(&ide_cfg_mtx); 1137 return 0; 1138out_unlink: 1139 ide_remove_port_from_hwgroup(hwif); 1140out_up: 1141 mutex_unlock(&ide_cfg_mtx); 1142 return 1; 1143} 1144 1145static int ata_lock(dev_t dev, void *data) 1146{ 1147 /* FIXME: we want to pin hwif down */ 1148 return 0; 1149} 1150 1151static struct kobject *ata_probe(dev_t dev, int *part, void *data) 1152{ 1153 ide_hwif_t *hwif = data; 1154 int unit = *part >> PARTN_BITS; 1155 ide_drive_t *drive = &hwif->drives[unit]; 1156 if (!drive->present) 1157 return NULL; 1158 1159 if (drive->media == ide_disk) 1160 request_module("ide-disk"); 1161 if (drive->scsi) 1162 request_module("ide-scsi"); 1163 if (drive->media == ide_cdrom || drive->media == ide_optical) 1164 request_module("ide-cd"); 1165 if (drive->media == ide_tape) 1166 request_module("ide-tape"); 1167 if (drive->media == ide_floppy) 1168 request_module("ide-floppy"); 1169 1170 return NULL; 1171} 1172 1173static struct kobject *exact_match(dev_t dev, int *part, void *data) 1174{ 1175 struct gendisk *p = data; 1176 *part &= (1 << PARTN_BITS) - 1; 1177 return &disk_to_dev(p)->kobj; 1178} 1179 1180static int exact_lock(dev_t dev, void *data) 1181{ 1182 struct gendisk *p = data; 1183 1184 if (!get_disk(p)) 1185 return -1; 1186 return 0; 1187} 1188 1189void ide_register_region(struct gendisk *disk) 1190{ 1191 blk_register_region(MKDEV(disk->major, disk->first_minor), 1192 disk->minors, NULL, exact_match, exact_lock, disk); 1193} 1194 1195EXPORT_SYMBOL_GPL(ide_register_region); 1196 1197void ide_unregister_region(struct gendisk *disk) 1198{ 1199 blk_unregister_region(MKDEV(disk->major, disk->first_minor), 1200 disk->minors); 1201} 1202 1203EXPORT_SYMBOL_GPL(ide_unregister_region); 1204 1205void ide_init_disk(struct gendisk *disk, ide_drive_t *drive) 1206{ 1207 ide_hwif_t *hwif = drive->hwif; 1208 unsigned int unit = (drive->select.all >> 4) & 1; 1209 1210 disk->major = hwif->major; 1211 disk->first_minor = unit << PARTN_BITS; 1212 sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit); 1213 disk->queue = drive->queue; 1214} 1215 1216EXPORT_SYMBOL_GPL(ide_init_disk); 1217 1218static void ide_remove_drive_from_hwgroup(ide_drive_t *drive) 1219{ 1220 ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; 1221 1222 if (drive == drive->next) { 1223 /* special case: last drive from hwgroup. */ 1224 BUG_ON(hwgroup->drive != drive); 1225 hwgroup->drive = NULL; 1226 } else { 1227 ide_drive_t *walk; 1228 1229 walk = hwgroup->drive; 1230 while (walk->next != drive) 1231 walk = walk->next; 1232 walk->next = drive->next; 1233 if (hwgroup->drive == drive) { 1234 hwgroup->drive = drive->next; 1235 hwgroup->hwif = hwgroup->drive->hwif; 1236 } 1237 } 1238 BUG_ON(hwgroup->drive == drive); 1239} 1240 1241static void drive_release_dev (struct device *dev) 1242{ 1243 ide_drive_t *drive = container_of(dev, ide_drive_t, gendev); 1244 1245 ide_proc_unregister_device(drive); 1246 1247 spin_lock_irq(&ide_lock); 1248 ide_remove_drive_from_hwgroup(drive); 1249 kfree(drive->id); 1250 drive->id = NULL; 1251 drive->present = 0; 1252 /* Messed up locking ... */ 1253 spin_unlock_irq(&ide_lock); 1254 blk_cleanup_queue(drive->queue); 1255 spin_lock_irq(&ide_lock); 1256 drive->queue = NULL; 1257 spin_unlock_irq(&ide_lock); 1258 1259 complete(&drive->gendev_rel_comp); 1260} 1261 1262static int hwif_init(ide_hwif_t *hwif) 1263{ 1264 int old_irq; 1265 1266 if (!hwif->irq) { 1267 hwif->irq = __ide_default_irq(hwif->io_ports.data_addr); 1268 if (!hwif->irq) { 1269 printk(KERN_ERR "%s: disabled, no IRQ\n", hwif->name); 1270 return 0; 1271 } 1272 } 1273 1274 if (register_blkdev(hwif->major, hwif->name)) 1275 return 0; 1276 1277 if (!hwif->sg_max_nents) 1278 hwif->sg_max_nents = PRD_ENTRIES; 1279 1280 hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents, 1281 GFP_KERNEL); 1282 if (!hwif->sg_table) { 1283 printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name); 1284 goto out; 1285 } 1286 1287 sg_init_table(hwif->sg_table, hwif->sg_max_nents); 1288 1289 if (init_irq(hwif) == 0) 1290 goto done; 1291 1292 old_irq = hwif->irq; 1293 /* 1294 * It failed to initialise. Find the default IRQ for 1295 * this port and try that. 1296 */ 1297 hwif->irq = __ide_default_irq(hwif->io_ports.data_addr); 1298 if (!hwif->irq) { 1299 printk(KERN_ERR "%s: disabled, unable to get IRQ %d\n", 1300 hwif->name, old_irq); 1301 goto out; 1302 } 1303 if (init_irq(hwif)) { 1304 printk(KERN_ERR "%s: probed IRQ %d and default IRQ %d failed\n", 1305 hwif->name, old_irq, hwif->irq); 1306 goto out; 1307 } 1308 printk(KERN_WARNING "%s: probed IRQ %d failed, using default\n", 1309 hwif->name, hwif->irq); 1310 1311done: 1312 blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS, 1313 THIS_MODULE, ata_probe, ata_lock, hwif); 1314 return 1; 1315 1316out: 1317 unregister_blkdev(hwif->major, hwif->name); 1318 return 0; 1319} 1320 1321static void hwif_register_devices(ide_hwif_t *hwif) 1322{ 1323 unsigned int i; 1324 1325 for (i = 0; i < MAX_DRIVES; i++) { 1326 ide_drive_t *drive = &hwif->drives[i]; 1327 struct device *dev = &drive->gendev; 1328 int ret; 1329 1330 if (!drive->present) 1331 continue; 1332 1333 snprintf(dev->bus_id, BUS_ID_SIZE, "%u.%u", hwif->index, i); 1334 dev->parent = &hwif->gendev; 1335 dev->bus = &ide_bus_type; 1336 dev->driver_data = drive; 1337 dev->release = drive_release_dev; 1338 1339 ret = device_register(dev); 1340 if (ret < 0) 1341 printk(KERN_WARNING "IDE: %s: device_register error: " 1342 "%d\n", __func__, ret); 1343 } 1344} 1345 1346static void ide_port_init_devices(ide_hwif_t *hwif) 1347{ 1348 const struct ide_port_ops *port_ops = hwif->port_ops; 1349 int i; 1350 1351 for (i = 0; i < MAX_DRIVES; i++) { 1352 ide_drive_t *drive = &hwif->drives[i]; 1353 1354 if (hwif->host_flags & IDE_HFLAG_IO_32BIT) 1355 drive->io_32bit = 1; 1356 if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS) 1357 drive->unmask = 1; 1358 if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS) 1359 drive->no_unmask = 1; 1360 1361 if (port_ops && port_ops->init_dev) 1362 port_ops->init_dev(drive); 1363 } 1364} 1365 1366static void ide_init_port(ide_hwif_t *hwif, unsigned int port, 1367 const struct ide_port_info *d) 1368{ 1369 hwif->channel = port; 1370 1371 if (d->chipset) 1372 hwif->chipset = d->chipset; 1373 1374 if (d->init_iops) 1375 d->init_iops(hwif); 1376 1377 if ((!hwif->irq && (d->host_flags & IDE_HFLAG_LEGACY_IRQS)) || 1378 (d->host_flags & IDE_HFLAG_FORCE_LEGACY_IRQS)) 1379 hwif->irq = port ? 15 : 14; 1380 1381 /* ->host_flags may be set by ->init_iops (or even earlier...) */ 1382 hwif->host_flags |= d->host_flags; 1383 hwif->pio_mask = d->pio_mask; 1384 1385 if (d->tp_ops) 1386 hwif->tp_ops = d->tp_ops; 1387 1388 /* ->set_pio_mode for DTC2278 is currently limited to port 0 */ 1389 if (hwif->chipset != ide_dtc2278 || hwif->channel == 0) 1390 hwif->port_ops = d->port_ops; 1391 1392 hwif->swdma_mask = d->swdma_mask; 1393 hwif->mwdma_mask = d->mwdma_mask; 1394 hwif->ultra_mask = d->udma_mask; 1395 1396 if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) { 1397 int rc; 1398 1399 if (d->init_dma) 1400 rc = d->init_dma(hwif, d); 1401 else 1402 rc = ide_hwif_setup_dma(hwif, d); 1403 1404 if (rc < 0) { 1405 printk(KERN_INFO "%s: DMA disabled\n", hwif->name); 1406 hwif->dma_base = 0; 1407 hwif->swdma_mask = 0; 1408 hwif->mwdma_mask = 0; 1409 hwif->ultra_mask = 0; 1410 } else if (d->dma_ops) 1411 hwif->dma_ops = d->dma_ops; 1412 } 1413 1414 if ((d->host_flags & IDE_HFLAG_SERIALIZE) || 1415 ((d->host_flags & IDE_HFLAG_SERIALIZE_DMA) && hwif->dma_base)) { 1416 if (hwif->mate) 1417 hwif->mate->serialized = hwif->serialized = 1; 1418 } 1419 1420 if (d->host_flags & IDE_HFLAG_RQSIZE_256) 1421 hwif->rqsize = 256; 1422 1423 /* call chipset specific routine for each enabled port */ 1424 if (d->init_hwif) 1425 d->init_hwif(hwif); 1426} 1427 1428static void ide_port_cable_detect(ide_hwif_t *hwif) 1429{ 1430 const struct ide_port_ops *port_ops = hwif->port_ops; 1431 1432 if (port_ops && port_ops->cable_detect && (hwif->ultra_mask & 0x78)) { 1433 if (hwif->cbl != ATA_CBL_PATA40_SHORT) 1434 hwif->cbl = port_ops->cable_detect(hwif); 1435 } 1436} 1437 1438static ssize_t store_delete_devices(struct device *portdev, 1439 struct device_attribute *attr, 1440 const char *buf, size_t n) 1441{ 1442 ide_hwif_t *hwif = dev_get_drvdata(portdev); 1443 1444 if (strncmp(buf, "1", n)) 1445 return -EINVAL; 1446 1447 ide_port_unregister_devices(hwif); 1448 1449 return n; 1450}; 1451 1452static DEVICE_ATTR(delete_devices, S_IWUSR, NULL, store_delete_devices); 1453 1454static ssize_t store_scan(struct device *portdev, 1455 struct device_attribute *attr, 1456 const char *buf, size_t n) 1457{ 1458 ide_hwif_t *hwif = dev_get_drvdata(portdev); 1459 1460 if (strncmp(buf, "1", n)) 1461 return -EINVAL; 1462 1463 ide_port_unregister_devices(hwif); 1464 ide_port_scan(hwif); 1465 1466 return n; 1467}; 1468 1469static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan); 1470 1471static struct device_attribute *ide_port_attrs[] = { 1472 &dev_attr_delete_devices, 1473 &dev_attr_scan, 1474 NULL 1475}; 1476 1477static int ide_sysfs_register_port(ide_hwif_t *hwif) 1478{ 1479 int i, uninitialized_var(rc); 1480 1481 for (i = 0; ide_port_attrs[i]; i++) { 1482 rc = device_create_file(hwif->portdev, ide_port_attrs[i]); 1483 if (rc) 1484 break; 1485 } 1486 1487 return rc; 1488} 1489 1490static unsigned int ide_indexes; 1491 1492/** 1493 * ide_find_port_slot - find free port slot 1494 * @d: IDE port info 1495 * 1496 * Return the new port slot index or -ENOENT if we are out of free slots. 1497 */ 1498 1499static int ide_find_port_slot(const struct ide_port_info *d) 1500{ 1501 int idx = -ENOENT; 1502 u8 bootable = (d && (d->host_flags & IDE_HFLAG_NON_BOOTABLE)) ? 0 : 1; 1503 u8 i = (d && (d->host_flags & IDE_HFLAG_QD_2ND_PORT)) ? 1 : 0;; 1504 1505 /* 1506 * Claim an unassigned slot. 1507 * 1508 * Give preference to claiming other slots before claiming ide0/ide1, 1509 * just in case there's another interface yet-to-be-scanned 1510 * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults). 1511 * 1512 * Unless there is a bootable card that does not use the standard 1513 * ports 0x1f0/0x170 (the ide0/ide1 defaults). 1514 */ 1515 mutex_lock(&ide_cfg_mtx); 1516 if (MAX_HWIFS == 1) { 1517 if (ide_indexes == 0 && i == 0) 1518 idx = 1; 1519 } else { 1520 if (bootable) { 1521 if ((ide_indexes | i) != (1 << MAX_HWIFS) - 1) 1522 idx = ffz(ide_indexes | i); 1523 } else { 1524 if ((ide_indexes | 3) != (1 << MAX_HWIFS) - 1) 1525 idx = ffz(ide_indexes | 3); 1526 else if ((ide_indexes & 3) != 3) 1527 idx = ffz(ide_indexes); 1528 } 1529 } 1530 if (idx >= 0) 1531 ide_indexes |= (1 << idx); 1532 mutex_unlock(&ide_cfg_mtx); 1533 1534 return idx; 1535} 1536 1537static void ide_free_port_slot(int idx) 1538{ 1539 mutex_lock(&ide_cfg_mtx); 1540 ide_indexes &= ~(1 << idx); 1541 mutex_unlock(&ide_cfg_mtx); 1542} 1543 1544struct ide_host *ide_host_alloc_all(const struct ide_port_info *d, 1545 hw_regs_t **hws) 1546{ 1547 struct ide_host *host; 1548 int i; 1549 1550 host = kzalloc(sizeof(*host), GFP_KERNEL); 1551 if (host == NULL) 1552 return NULL; 1553 1554 for (i = 0; i < MAX_HWIFS; i++) { 1555 ide_hwif_t *hwif; 1556 int idx; 1557 1558 if (hws[i] == NULL) 1559 continue; 1560 1561 hwif = kzalloc(sizeof(*hwif), GFP_KERNEL); 1562 if (hwif == NULL) 1563 continue; 1564 1565 idx = ide_find_port_slot(d); 1566 if (idx < 0) { 1567 printk(KERN_ERR "%s: no free slot for interface\n", 1568 d ? d->name : "ide"); 1569 kfree(hwif); 1570 continue; 1571 } 1572 1573 ide_init_port_data(hwif, idx); 1574 1575 hwif->host = host; 1576 1577 host->ports[i] = hwif; 1578 host->n_ports++; 1579 } 1580 1581 if (host->n_ports == 0) { 1582 kfree(host); 1583 return NULL; 1584 } 1585 1586 if (hws[0]) 1587 host->dev[0] = hws[0]->dev; 1588 1589 if (d) { 1590 host->init_chipset = d->init_chipset; 1591 host->host_flags = d->host_flags; 1592 } 1593 1594 return host; 1595} 1596EXPORT_SYMBOL_GPL(ide_host_alloc_all); 1597 1598struct ide_host *ide_host_alloc(const struct ide_port_info *d, hw_regs_t **hws) 1599{ 1600 hw_regs_t *hws_all[MAX_HWIFS]; 1601 int i; 1602 1603 for (i = 0; i < MAX_HWIFS; i++) 1604 hws_all[i] = (i < 4) ? hws[i] : NULL; 1605 1606 return ide_host_alloc_all(d, hws_all); 1607} 1608EXPORT_SYMBOL_GPL(ide_host_alloc); 1609 1610int ide_host_register(struct ide_host *host, const struct ide_port_info *d, 1611 hw_regs_t **hws) 1612{ 1613 ide_hwif_t *hwif, *mate = NULL; 1614 int i, j = 0; 1615 1616 for (i = 0; i < MAX_HWIFS; i++) { 1617 hwif = host->ports[i]; 1618 1619 if (hwif == NULL) { 1620 mate = NULL; 1621 continue; 1622 } 1623 1624 ide_init_port_hw(hwif, hws[i]); 1625 ide_port_apply_params(hwif); 1626 1627 if (d == NULL) { 1628 mate = NULL; 1629 continue; 1630 } 1631 1632 if ((i & 1) && mate) { 1633 hwif->mate = mate; 1634 mate->mate = hwif; 1635 } 1636 1637 mate = (i & 1) ? NULL : hwif; 1638 1639 ide_init_port(hwif, i & 1, d); 1640 ide_port_cable_detect(hwif); 1641 ide_port_init_devices(hwif); 1642 } 1643 1644 for (i = 0; i < MAX_HWIFS; i++) { 1645 hwif = host->ports[i]; 1646 1647 if (hwif == NULL) 1648 continue; 1649 1650 if (ide_probe_port(hwif) == 0) 1651 hwif->present = 1; 1652 1653 if (hwif->chipset != ide_4drives || !hwif->mate || 1654 !hwif->mate->present) 1655 ide_register_port(hwif); 1656 1657 if (hwif->present) 1658 ide_port_tune_devices(hwif); 1659 } 1660 1661 for (i = 0; i < MAX_HWIFS; i++) { 1662 hwif = host->ports[i]; 1663 1664 if (hwif == NULL) 1665 continue; 1666 1667 if (hwif_init(hwif) == 0) { 1668 printk(KERN_INFO "%s: failed to initialize IDE " 1669 "interface\n", hwif->name); 1670 hwif->present = 0; 1671 continue; 1672 } 1673 1674 j++; 1675 1676 if (hwif->present) 1677 ide_port_setup_devices(hwif); 1678 1679 ide_acpi_init(hwif); 1680 1681 if (hwif->present) 1682 ide_acpi_port_init_devices(hwif); 1683 } 1684 1685 for (i = 0; i < MAX_HWIFS; i++) { 1686 hwif = host->ports[i]; 1687 1688 if (hwif == NULL) 1689 continue; 1690 1691 if (hwif->chipset == ide_unknown) 1692 hwif->chipset = ide_generic; 1693 1694 if (hwif->present) 1695 hwif_register_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 ide_sysfs_register_port(hwif); 1705 ide_proc_register_port(hwif); 1706 1707 if (hwif->present) 1708 ide_proc_port_register_devices(hwif); 1709 } 1710 1711 return j ? 0 : -1; 1712} 1713EXPORT_SYMBOL_GPL(ide_host_register); 1714 1715int ide_host_add(const struct ide_port_info *d, hw_regs_t **hws, 1716 struct ide_host **hostp) 1717{ 1718 struct ide_host *host; 1719 int rc; 1720 1721 host = ide_host_alloc(d, hws); 1722 if (host == NULL) 1723 return -ENOMEM; 1724 1725 rc = ide_host_register(host, d, hws); 1726 if (rc) { 1727 ide_host_free(host); 1728 return rc; 1729 } 1730 1731 if (hostp) 1732 *hostp = host; 1733 1734 return 0; 1735} 1736EXPORT_SYMBOL_GPL(ide_host_add); 1737 1738void ide_host_free(struct ide_host *host) 1739{ 1740 ide_hwif_t *hwif; 1741 int i; 1742 1743 for (i = 0; i < MAX_HWIFS; i++) { 1744 hwif = host->ports[i]; 1745 1746 if (hwif == NULL) 1747 continue; 1748 1749 ide_free_port_slot(hwif->index); 1750 kfree(hwif); 1751 } 1752 1753 kfree(host); 1754} 1755EXPORT_SYMBOL_GPL(ide_host_free); 1756 1757void ide_host_remove(struct ide_host *host) 1758{ 1759 int i; 1760 1761 for (i = 0; i < MAX_HWIFS; i++) { 1762 if (host->ports[i]) 1763 ide_unregister(host->ports[i]); 1764 } 1765 1766 ide_host_free(host); 1767} 1768EXPORT_SYMBOL_GPL(ide_host_remove); 1769 1770void ide_port_scan(ide_hwif_t *hwif) 1771{ 1772 ide_port_apply_params(hwif); 1773 ide_port_cable_detect(hwif); 1774 ide_port_init_devices(hwif); 1775 1776 if (ide_probe_port(hwif) < 0) 1777 return; 1778 1779 hwif->present = 1; 1780 1781 ide_port_tune_devices(hwif); 1782 ide_acpi_port_init_devices(hwif); 1783 ide_port_setup_devices(hwif); 1784 hwif_register_devices(hwif); 1785 ide_proc_port_register_devices(hwif); 1786} 1787EXPORT_SYMBOL_GPL(ide_port_scan); 1788 1789static void ide_legacy_init_one(hw_regs_t **hws, hw_regs_t *hw, 1790 u8 port_no, const struct ide_port_info *d, 1791 unsigned long config) 1792{ 1793 unsigned long base, ctl; 1794 int irq; 1795 1796 if (port_no == 0) { 1797 base = 0x1f0; 1798 ctl = 0x3f6; 1799 irq = 14; 1800 } else { 1801 base = 0x170; 1802 ctl = 0x376; 1803 irq = 15; 1804 } 1805 1806 if (!request_region(base, 8, d->name)) { 1807 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n", 1808 d->name, base, base + 7); 1809 return; 1810 } 1811 1812 if (!request_region(ctl, 1, d->name)) { 1813 printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n", 1814 d->name, ctl); 1815 release_region(base, 8); 1816 return; 1817 } 1818 1819 ide_std_init_ports(hw, base, ctl); 1820 hw->irq = irq; 1821 hw->chipset = d->chipset; 1822 hw->config = config; 1823 1824 hws[port_no] = hw; 1825} 1826 1827int ide_legacy_device_add(const struct ide_port_info *d, unsigned long config) 1828{ 1829 hw_regs_t hw[2], *hws[] = { NULL, NULL, NULL, NULL }; 1830 1831 memset(&hw, 0, sizeof(hw)); 1832 1833 if ((d->host_flags & IDE_HFLAG_QD_2ND_PORT) == 0) 1834 ide_legacy_init_one(hws, &hw[0], 0, d, config); 1835 ide_legacy_init_one(hws, &hw[1], 1, d, config); 1836 1837 if (hws[0] == NULL && hws[1] == NULL && 1838 (d->host_flags & IDE_HFLAG_SINGLE)) 1839 return -ENOENT; 1840 1841 return ide_host_add(d, hws, NULL); 1842} 1843EXPORT_SYMBOL_GPL(ide_legacy_device_add); 1844