ide-probe.c revision a36223b0dc14606b5c80aacbbe6288133693a841
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 return; 210 } 211 212 /* 213 * Not an ATAPI device: looks like a "regular" hard disk 214 */ 215 216 is_cfa = ata_id_is_cfa(id); 217 218 /* CF devices are *not* removable in Linux definition of the term */ 219 if (is_cfa == 0 && (id[ATA_ID_CONFIG] & (1 << 7))) 220 drive->dev_flags |= IDE_DFLAG_REMOVABLE; 221 222 drive->media = ide_disk; 223 224 printk(KERN_CONT "%s DISK drive\n", is_cfa ? "CFA" : "ATA"); 225 226 return; 227 228err_misc: 229 kfree(id); 230 drive->dev_flags &= ~IDE_DFLAG_PRESENT; 231 return; 232} 233 234/** 235 * actual_try_to_identify - send ata/atapi identify 236 * @drive: drive to identify 237 * @cmd: command to use 238 * 239 * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive 240 * and waits for a response. It also monitors irqs while this is 241 * happening, in hope of automatically determining which one is 242 * being used by the interface. 243 * 244 * Returns: 0 device was identified 245 * 1 device timed-out (no response to identify request) 246 * 2 device aborted the command (refused to identify itself) 247 */ 248 249static int actual_try_to_identify (ide_drive_t *drive, u8 cmd) 250{ 251 ide_hwif_t *hwif = HWIF(drive); 252 struct ide_io_ports *io_ports = &hwif->io_ports; 253 const struct ide_tp_ops *tp_ops = hwif->tp_ops; 254 int use_altstatus = 0, rc; 255 unsigned long timeout; 256 u8 s = 0, a = 0; 257 258 /* take a deep breath */ 259 msleep(50); 260 261 if (io_ports->ctl_addr) { 262 a = tp_ops->read_altstatus(hwif); 263 s = tp_ops->read_status(hwif); 264 if ((a ^ s) & ~ATA_IDX) 265 /* ancient Seagate drives, broken interfaces */ 266 printk(KERN_INFO "%s: probing with STATUS(0x%02x) " 267 "instead of ALTSTATUS(0x%02x)\n", 268 drive->name, s, a); 269 else 270 /* use non-intrusive polling */ 271 use_altstatus = 1; 272 } 273 274 /* set features register for atapi 275 * identify command to be sure of reply 276 */ 277 if (cmd == ATA_CMD_ID_ATAPI) { 278 ide_task_t task; 279 280 memset(&task, 0, sizeof(task)); 281 /* disable DMA & overlap */ 282 task.tf_flags = IDE_TFLAG_OUT_FEATURE; 283 284 tp_ops->tf_load(drive, &task); 285 } 286 287 /* ask drive for ID */ 288 tp_ops->exec_command(hwif, cmd); 289 290 timeout = ((cmd == ATA_CMD_ID_ATA) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2; 291 292 if (ide_busy_sleep(hwif, timeout, use_altstatus)) 293 return 1; 294 295 /* wait for IRQ and ATA_DRQ */ 296 msleep(50); 297 s = tp_ops->read_status(hwif); 298 299 if (OK_STAT(s, ATA_DRQ, BAD_R_STAT)) { 300 unsigned long flags; 301 302 /* local CPU only; some systems need this */ 303 local_irq_save(flags); 304 /* drive returned ID */ 305 do_identify(drive, cmd); 306 /* drive responded with ID */ 307 rc = 0; 308 /* clear drive IRQ */ 309 (void)tp_ops->read_status(hwif); 310 local_irq_restore(flags); 311 } else { 312 /* drive refused ID */ 313 rc = 2; 314 } 315 return rc; 316} 317 318/** 319 * try_to_identify - try to identify a drive 320 * @drive: drive to probe 321 * @cmd: command to use 322 * 323 * Issue the identify command and then do IRQ probing to 324 * complete the identification when needed by finding the 325 * IRQ the drive is attached to 326 */ 327 328static int try_to_identify (ide_drive_t *drive, u8 cmd) 329{ 330 ide_hwif_t *hwif = HWIF(drive); 331 const struct ide_tp_ops *tp_ops = hwif->tp_ops; 332 int retval; 333 int autoprobe = 0; 334 unsigned long cookie = 0; 335 336 /* 337 * Disable device irq unless we need to 338 * probe for it. Otherwise we'll get spurious 339 * interrupts during the identify-phase that 340 * the irq handler isn't expecting. 341 */ 342 if (hwif->io_ports.ctl_addr) { 343 if (!hwif->irq) { 344 autoprobe = 1; 345 cookie = probe_irq_on(); 346 } 347 tp_ops->set_irq(hwif, autoprobe); 348 } 349 350 retval = actual_try_to_identify(drive, cmd); 351 352 if (autoprobe) { 353 int irq; 354 355 tp_ops->set_irq(hwif, 0); 356 /* clear drive IRQ */ 357 (void)tp_ops->read_status(hwif); 358 udelay(5); 359 irq = probe_irq_off(cookie); 360 if (!hwif->irq) { 361 if (irq > 0) { 362 hwif->irq = irq; 363 } else { 364 /* Mmmm.. multiple IRQs.. 365 * don't know which was ours 366 */ 367 printk(KERN_ERR "%s: IRQ probe failed (0x%lx)\n", 368 drive->name, cookie); 369 } 370 } 371 } 372 return retval; 373} 374 375int ide_busy_sleep(ide_hwif_t *hwif, unsigned long timeout, int altstatus) 376{ 377 u8 stat; 378 379 timeout += jiffies; 380 381 do { 382 msleep(50); /* give drive a breather */ 383 stat = altstatus ? hwif->tp_ops->read_altstatus(hwif) 384 : hwif->tp_ops->read_status(hwif); 385 if ((stat & ATA_BUSY) == 0) 386 return 0; 387 } while (time_before(jiffies, timeout)); 388 389 return 1; /* drive timed-out */ 390} 391 392static u8 ide_read_device(ide_drive_t *drive) 393{ 394 ide_task_t task; 395 396 memset(&task, 0, sizeof(task)); 397 task.tf_flags = IDE_TFLAG_IN_DEVICE; 398 399 drive->hwif->tp_ops->tf_read(drive, &task); 400 401 return task.tf.device; 402} 403 404/** 405 * do_probe - probe an IDE device 406 * @drive: drive to probe 407 * @cmd: command to use 408 * 409 * do_probe() has the difficult job of finding a drive if it exists, 410 * without getting hung up if it doesn't exist, without trampling on 411 * ethernet cards, and without leaving any IRQs dangling to haunt us later. 412 * 413 * If a drive is "known" to exist (from CMOS or kernel parameters), 414 * but does not respond right away, the probe will "hang in there" 415 * for the maximum wait time (about 30 seconds), otherwise it will 416 * exit much more quickly. 417 * 418 * Returns: 0 device was identified 419 * 1 device timed-out (no response to identify request) 420 * 2 device aborted the command (refused to identify itself) 421 * 3 bad status from device (possible for ATAPI drives) 422 * 4 probe was not attempted because failure was obvious 423 */ 424 425static int do_probe (ide_drive_t *drive, u8 cmd) 426{ 427 ide_hwif_t *hwif = HWIF(drive); 428 const struct ide_tp_ops *tp_ops = hwif->tp_ops; 429 int rc; 430 u8 present = !!(drive->dev_flags & IDE_DFLAG_PRESENT), stat; 431 432 /* avoid waiting for inappropriate probes */ 433 if (present && 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, 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 && present == 0) { 450 if (drive->dn & 1) { 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 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->dn & 1) { 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 546 * (note: IDE_DFLAG_PRESENT might still be not set) 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->dev_flags &= ~IDE_DFLAG_ID_READ; 563 564 drive->id = kzalloc(SECTOR_SIZE, GFP_KERNEL); 565 if (drive->id == NULL) { 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->dev_flags & IDE_DFLAG_NOPROBE) == 0) { 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->dev_flags & IDE_DFLAG_PRESENT) == 0) 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->dev_flags & IDE_DFLAG_ID_READ) == 0) { 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->dev_flags &= ~IDE_DFLAG_PRESENT; 602 } 603 } 604 /* drive was found */ 605 } 606 607 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) 608 return 0; 609 610 /* The drive wasn't being helpful. Add generic info only */ 611 if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) { 612 generic_id(drive); 613 return 1; 614 } 615 616 if (drive->media == ide_disk) { 617 ide_disk_init_chs(drive); 618 ide_disk_init_mult_count(drive); 619 } 620 621 return !!(drive->dev_flags & IDE_DFLAG_PRESENT); 622} 623 624static void hwif_release_dev(struct device *dev) 625{ 626 ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev); 627 628 complete(&hwif->gendev_rel_comp); 629} 630 631static int ide_register_port(ide_hwif_t *hwif) 632{ 633 int ret; 634 635 /* register with global device tree */ 636 strlcpy(hwif->gendev.bus_id,hwif->name,BUS_ID_SIZE); 637 hwif->gendev.driver_data = hwif; 638 if (hwif->gendev.parent == NULL) { 639 if (hwif->dev) 640 hwif->gendev.parent = hwif->dev; 641 else 642 /* Would like to do = &device_legacy */ 643 hwif->gendev.parent = NULL; 644 } 645 hwif->gendev.release = hwif_release_dev; 646 ret = device_register(&hwif->gendev); 647 if (ret < 0) { 648 printk(KERN_WARNING "IDE: %s: device_register error: %d\n", 649 __func__, ret); 650 goto out; 651 } 652 653 hwif->portdev = device_create_drvdata(ide_port_class, &hwif->gendev, 654 MKDEV(0, 0), hwif, hwif->name); 655 if (IS_ERR(hwif->portdev)) { 656 ret = PTR_ERR(hwif->portdev); 657 device_unregister(&hwif->gendev); 658 } 659out: 660 return ret; 661} 662 663/** 664 * ide_port_wait_ready - wait for port to become ready 665 * @hwif: IDE port 666 * 667 * This is needed on some PPCs and a bunch of BIOS-less embedded 668 * platforms. Typical cases are: 669 * 670 * - The firmware hard reset the disk before booting the kernel, 671 * the drive is still doing it's poweron-reset sequence, that 672 * can take up to 30 seconds. 673 * 674 * - The firmware does nothing (or no firmware), the device is 675 * still in POST state (same as above actually). 676 * 677 * - Some CD/DVD/Writer combo drives tend to drive the bus during 678 * their reset sequence even when they are non-selected slave 679 * devices, thus preventing discovery of the main HD. 680 * 681 * Doing this wait-for-non-busy should not harm any existing 682 * configuration and fix some issues like the above. 683 * 684 * BenH. 685 * 686 * Returns 0 on success, error code (< 0) otherwise. 687 */ 688 689static int ide_port_wait_ready(ide_hwif_t *hwif) 690{ 691 int unit, rc; 692 693 printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name); 694 695 /* Let HW settle down a bit from whatever init state we 696 * come from */ 697 mdelay(2); 698 699 /* Wait for BSY bit to go away, spec timeout is 30 seconds, 700 * I know of at least one disk who takes 31 seconds, I use 35 701 * here to be safe 702 */ 703 rc = ide_wait_not_busy(hwif, 35000); 704 if (rc) 705 return rc; 706 707 /* Now make sure both master & slave are ready */ 708 for (unit = 0; unit < MAX_DRIVES; unit++) { 709 ide_drive_t *drive = &hwif->drives[unit]; 710 711 /* Ignore disks that we will not probe for later. */ 712 if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0 || 713 (drive->dev_flags & IDE_DFLAG_PRESENT)) { 714 SELECT_DRIVE(drive); 715 hwif->tp_ops->set_irq(hwif, 1); 716 mdelay(2); 717 rc = ide_wait_not_busy(hwif, 35000); 718 if (rc) 719 goto out; 720 } else 721 printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n", 722 drive->name); 723 } 724out: 725 /* Exit function with master reselected (let's be sane) */ 726 if (unit) 727 SELECT_DRIVE(&hwif->drives[0]); 728 729 return rc; 730} 731 732/** 733 * ide_undecoded_slave - look for bad CF adapters 734 * @dev1: slave device 735 * 736 * Analyse the drives on the interface and attempt to decide if we 737 * have the same drive viewed twice. This occurs with crap CF adapters 738 * and PCMCIA sometimes. 739 */ 740 741void ide_undecoded_slave(ide_drive_t *dev1) 742{ 743 ide_drive_t *dev0 = &dev1->hwif->drives[0]; 744 745 if ((dev1->dn & 1) == 0 || (dev0->dev_flags & IDE_DFLAG_PRESENT) == 0) 746 return; 747 748 /* If the models don't match they are not the same product */ 749 if (strcmp((char *)&dev0->id[ATA_ID_PROD], 750 (char *)&dev1->id[ATA_ID_PROD])) 751 return; 752 753 /* Serial numbers do not match */ 754 if (strncmp((char *)&dev0->id[ATA_ID_SERNO], 755 (char *)&dev1->id[ATA_ID_SERNO], ATA_ID_SERNO_LEN)) 756 return; 757 758 /* No serial number, thankfully very rare for CF */ 759 if (*(char *)&dev0->id[ATA_ID_SERNO] == 0) 760 return; 761 762 /* Appears to be an IDE flash adapter with decode bugs */ 763 printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n"); 764 765 dev1->dev_flags &= ~IDE_DFLAG_PRESENT; 766} 767 768EXPORT_SYMBOL_GPL(ide_undecoded_slave); 769 770static int ide_probe_port(ide_hwif_t *hwif) 771{ 772 unsigned long flags; 773 unsigned int irqd; 774 int unit, rc = -ENODEV; 775 776 BUG_ON(hwif->present); 777 778 if ((hwif->drives[0].dev_flags & IDE_DFLAG_NOPROBE) && 779 (hwif->drives[1].dev_flags & IDE_DFLAG_NOPROBE)) 780 return -EACCES; 781 782 /* 783 * We must always disable IRQ, as probe_for_drive will assert IRQ, but 784 * we'll install our IRQ driver much later... 785 */ 786 irqd = hwif->irq; 787 if (irqd) 788 disable_irq(hwif->irq); 789 790 local_irq_set(flags); 791 792 if (ide_port_wait_ready(hwif) == -EBUSY) 793 printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name); 794 795 /* 796 * Second drive should only exist if first drive was found, 797 * but a lot of cdrom drives are configured as single slaves. 798 */ 799 for (unit = 0; unit < MAX_DRIVES; ++unit) { 800 ide_drive_t *drive = &hwif->drives[unit]; 801 802 (void) probe_for_drive(drive); 803 if (drive->dev_flags & IDE_DFLAG_PRESENT) 804 rc = 0; 805 } 806 807 local_irq_restore(flags); 808 809 /* 810 * Use cached IRQ number. It might be (and is...) changed by probe 811 * code above 812 */ 813 if (irqd) 814 enable_irq(irqd); 815 816 return rc; 817} 818 819static void ide_port_tune_devices(ide_hwif_t *hwif) 820{ 821 const struct ide_port_ops *port_ops = hwif->port_ops; 822 int unit; 823 824 for (unit = 0; unit < MAX_DRIVES; unit++) { 825 ide_drive_t *drive = &hwif->drives[unit]; 826 827 if (drive->dev_flags & IDE_DFLAG_PRESENT) { 828 if (port_ops && port_ops->quirkproc) 829 port_ops->quirkproc(drive); 830 } 831 } 832 833 for (unit = 0; unit < MAX_DRIVES; ++unit) { 834 ide_drive_t *drive = &hwif->drives[unit]; 835 836 if (drive->dev_flags & IDE_DFLAG_PRESENT) { 837 ide_set_max_pio(drive); 838 839 drive->dev_flags |= IDE_DFLAG_NICE1; 840 841 if (hwif->dma_ops) 842 ide_set_dma(drive); 843 } 844 } 845 846 for (unit = 0; unit < MAX_DRIVES; ++unit) { 847 ide_drive_t *drive = &hwif->drives[unit]; 848 849 if ((hwif->host_flags & IDE_HFLAG_NO_IO_32BIT) || 850 drive->id[ATA_ID_DWORD_IO]) 851 drive->dev_flags |= IDE_DFLAG_NO_IO_32BIT; 852 else 853 drive->dev_flags &= ~IDE_DFLAG_NO_IO_32BIT; 854 } 855} 856 857/* 858 * save_match() is used to simplify logic in init_irq() below. 859 * 860 * A loophole here is that we may not know about a particular 861 * hwif's irq until after that hwif is actually probed/initialized.. 862 * This could be a problem for the case where an hwif is on a 863 * dual interface that requires serialization (eg. cmd640) and another 864 * hwif using one of the same irqs is initialized beforehand. 865 * 866 * This routine detects and reports such situations, but does not fix them. 867 */ 868static void save_match(ide_hwif_t *hwif, ide_hwif_t *new, ide_hwif_t **match) 869{ 870 ide_hwif_t *m = *match; 871 872 if (m && m->hwgroup && m->hwgroup != new->hwgroup) { 873 if (!new->hwgroup) 874 return; 875 printk(KERN_WARNING "%s: potential IRQ problem with %s and %s\n", 876 hwif->name, new->name, m->name); 877 } 878 if (!m || m->irq != hwif->irq) /* don't undo a prior perfect match */ 879 *match = new; 880} 881 882/* 883 * init request queue 884 */ 885static int ide_init_queue(ide_drive_t *drive) 886{ 887 struct request_queue *q; 888 ide_hwif_t *hwif = HWIF(drive); 889 int max_sectors = 256; 890 int max_sg_entries = PRD_ENTRIES; 891 892 /* 893 * Our default set up assumes the normal IDE case, 894 * that is 64K segmenting, standard PRD setup 895 * and LBA28. Some drivers then impose their own 896 * limits and LBA48 we could raise it but as yet 897 * do not. 898 */ 899 900 q = blk_init_queue_node(do_ide_request, &ide_lock, hwif_to_node(hwif)); 901 if (!q) 902 return 1; 903 904 q->queuedata = drive; 905 blk_queue_segment_boundary(q, 0xffff); 906 907 if (hwif->rqsize < max_sectors) 908 max_sectors = hwif->rqsize; 909 blk_queue_max_sectors(q, max_sectors); 910 911#ifdef CONFIG_PCI 912 /* When we have an IOMMU, we may have a problem where pci_map_sg() 913 * creates segments that don't completely match our boundary 914 * requirements and thus need to be broken up again. Because it 915 * doesn't align properly either, we may actually have to break up 916 * to more segments than what was we got in the first place, a max 917 * worst case is twice as many. 918 * This will be fixed once we teach pci_map_sg() about our boundary 919 * requirements, hopefully soon. *FIXME* 920 */ 921 if (!PCI_DMA_BUS_IS_PHYS) 922 max_sg_entries >>= 1; 923#endif /* CONFIG_PCI */ 924 925 blk_queue_max_hw_segments(q, max_sg_entries); 926 blk_queue_max_phys_segments(q, max_sg_entries); 927 928 /* assign drive queue */ 929 drive->queue = q; 930 931 /* needs drive->queue to be set */ 932 ide_toggle_bounce(drive, 1); 933 934 return 0; 935} 936 937static void ide_add_drive_to_hwgroup(ide_drive_t *drive) 938{ 939 ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; 940 941 spin_lock_irq(&ide_lock); 942 if (!hwgroup->drive) { 943 /* first drive for hwgroup. */ 944 drive->next = drive; 945 hwgroup->drive = drive; 946 hwgroup->hwif = HWIF(hwgroup->drive); 947 } else { 948 drive->next = hwgroup->drive->next; 949 hwgroup->drive->next = drive; 950 } 951 spin_unlock_irq(&ide_lock); 952} 953 954/* 955 * For any present drive: 956 * - allocate the block device queue 957 * - link drive into the hwgroup 958 */ 959static void ide_port_setup_devices(ide_hwif_t *hwif) 960{ 961 int i; 962 963 mutex_lock(&ide_cfg_mtx); 964 for (i = 0; i < MAX_DRIVES; i++) { 965 ide_drive_t *drive = &hwif->drives[i]; 966 967 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) 968 continue; 969 970 if (ide_init_queue(drive)) { 971 printk(KERN_ERR "ide: failed to init %s\n", 972 drive->name); 973 continue; 974 } 975 976 ide_add_drive_to_hwgroup(drive); 977 } 978 mutex_unlock(&ide_cfg_mtx); 979} 980 981static ide_hwif_t *ide_ports[MAX_HWIFS]; 982 983void ide_remove_port_from_hwgroup(ide_hwif_t *hwif) 984{ 985 ide_hwgroup_t *hwgroup = hwif->hwgroup; 986 987 ide_ports[hwif->index] = NULL; 988 989 spin_lock_irq(&ide_lock); 990 /* 991 * Remove us from the hwgroup, and free 992 * the hwgroup if we were the only member 993 */ 994 if (hwif->next == hwif) { 995 BUG_ON(hwgroup->hwif != hwif); 996 kfree(hwgroup); 997 } else { 998 /* There is another interface in hwgroup. 999 * Unlink us, and set hwgroup->drive and ->hwif to 1000 * something sane. 1001 */ 1002 ide_hwif_t *g = hwgroup->hwif; 1003 1004 while (g->next != hwif) 1005 g = g->next; 1006 g->next = hwif->next; 1007 if (hwgroup->hwif == hwif) { 1008 /* Chose a random hwif for hwgroup->hwif. 1009 * It's guaranteed that there are no drives 1010 * left in the hwgroup. 1011 */ 1012 BUG_ON(hwgroup->drive != NULL); 1013 hwgroup->hwif = g; 1014 } 1015 BUG_ON(hwgroup->hwif == hwif); 1016 } 1017 spin_unlock_irq(&ide_lock); 1018} 1019 1020/* 1021 * This routine sets up the irq for an ide interface, and creates a new 1022 * hwgroup for the irq/hwif if none was previously assigned. 1023 * 1024 * Much of the code is for correctly detecting/handling irq sharing 1025 * and irq serialization situations. This is somewhat complex because 1026 * it handles static as well as dynamic (PCMCIA) IDE interfaces. 1027 */ 1028static int init_irq (ide_hwif_t *hwif) 1029{ 1030 struct ide_io_ports *io_ports = &hwif->io_ports; 1031 unsigned int index; 1032 ide_hwgroup_t *hwgroup; 1033 ide_hwif_t *match = NULL; 1034 1035 mutex_lock(&ide_cfg_mtx); 1036 hwif->hwgroup = NULL; 1037 1038 /* 1039 * Group up with any other hwifs that share our irq(s). 1040 */ 1041 for (index = 0; index < MAX_HWIFS; index++) { 1042 ide_hwif_t *h = ide_ports[index]; 1043 1044 if (h && h->hwgroup) { /* scan only initialized ports */ 1045 if (hwif->irq == h->irq) { 1046 hwif->sharing_irq = h->sharing_irq = 1; 1047 if (hwif->chipset != ide_pci || 1048 h->chipset != ide_pci) { 1049 save_match(hwif, h, &match); 1050 } 1051 } 1052 if (hwif->serialized) { 1053 if (hwif->mate && hwif->mate->irq == h->irq) 1054 save_match(hwif, h, &match); 1055 } 1056 if (h->serialized) { 1057 if (h->mate && hwif->irq == h->mate->irq) 1058 save_match(hwif, h, &match); 1059 } 1060 } 1061 } 1062 1063 /* 1064 * If we are still without a hwgroup, then form a new one 1065 */ 1066 if (match) { 1067 hwgroup = match->hwgroup; 1068 hwif->hwgroup = hwgroup; 1069 /* 1070 * Link us into the hwgroup. 1071 * This must be done early, do ensure that unexpected_intr 1072 * can find the hwif and prevent irq storms. 1073 * No drives are attached to the new hwif, choose_drive 1074 * can't do anything stupid (yet). 1075 * Add ourself as the 2nd entry to the hwgroup->hwif 1076 * linked list, the first entry is the hwif that owns 1077 * hwgroup->handler - do not change that. 1078 */ 1079 spin_lock_irq(&ide_lock); 1080 hwif->next = hwgroup->hwif->next; 1081 hwgroup->hwif->next = hwif; 1082 BUG_ON(hwif->next == hwif); 1083 spin_unlock_irq(&ide_lock); 1084 } else { 1085 hwgroup = kmalloc_node(sizeof(*hwgroup), GFP_KERNEL|__GFP_ZERO, 1086 hwif_to_node(hwif)); 1087 if (hwgroup == NULL) 1088 goto out_up; 1089 1090 hwif->hwgroup = hwgroup; 1091 hwgroup->hwif = hwif->next = hwif; 1092 1093 init_timer(&hwgroup->timer); 1094 hwgroup->timer.function = &ide_timer_expiry; 1095 hwgroup->timer.data = (unsigned long) hwgroup; 1096 } 1097 1098 ide_ports[hwif->index] = hwif; 1099 1100 /* 1101 * Allocate the irq, if not already obtained for another hwif 1102 */ 1103 if (!match || match->irq != hwif->irq) { 1104 int sa = 0; 1105#if defined(__mc68000__) 1106 sa = IRQF_SHARED; 1107#endif /* __mc68000__ */ 1108 1109 if (hwif->chipset == ide_pci || hwif->chipset == ide_cmd646 || 1110 hwif->chipset == ide_ali14xx) 1111 sa = IRQF_SHARED; 1112 1113 if (io_ports->ctl_addr) 1114 hwif->tp_ops->set_irq(hwif, 1); 1115 1116 if (request_irq(hwif->irq,&ide_intr,sa,hwif->name,hwgroup)) 1117 goto out_unlink; 1118 } 1119 1120 if (!hwif->rqsize) { 1121 if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) || 1122 (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA)) 1123 hwif->rqsize = 256; 1124 else 1125 hwif->rqsize = 65536; 1126 } 1127 1128#if !defined(__mc68000__) 1129 printk(KERN_INFO "%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name, 1130 io_ports->data_addr, io_ports->status_addr, 1131 io_ports->ctl_addr, hwif->irq); 1132#else 1133 printk(KERN_INFO "%s at 0x%08lx on irq %d", hwif->name, 1134 io_ports->data_addr, hwif->irq); 1135#endif /* __mc68000__ */ 1136 if (match) 1137 printk(KERN_CONT " (%sed with %s)", 1138 hwif->sharing_irq ? "shar" : "serializ", match->name); 1139 printk(KERN_CONT "\n"); 1140 1141 mutex_unlock(&ide_cfg_mtx); 1142 return 0; 1143out_unlink: 1144 ide_remove_port_from_hwgroup(hwif); 1145out_up: 1146 mutex_unlock(&ide_cfg_mtx); 1147 return 1; 1148} 1149 1150static int ata_lock(dev_t dev, void *data) 1151{ 1152 /* FIXME: we want to pin hwif down */ 1153 return 0; 1154} 1155 1156static struct kobject *ata_probe(dev_t dev, int *part, void *data) 1157{ 1158 ide_hwif_t *hwif = data; 1159 int unit = *part >> PARTN_BITS; 1160 ide_drive_t *drive = &hwif->drives[unit]; 1161 1162 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) 1163 return NULL; 1164 1165 if (drive->media == ide_disk) 1166 request_module("ide-disk"); 1167 if (drive->dev_flags & IDE_DFLAG_SCSI) 1168 request_module("ide-scsi"); 1169 if (drive->media == ide_cdrom || drive->media == ide_optical) 1170 request_module("ide-cd"); 1171 if (drive->media == ide_tape) 1172 request_module("ide-tape"); 1173 if (drive->media == ide_floppy) 1174 request_module("ide-floppy"); 1175 1176 return NULL; 1177} 1178 1179static struct kobject *exact_match(dev_t dev, int *part, void *data) 1180{ 1181 struct gendisk *p = data; 1182 *part &= (1 << PARTN_BITS) - 1; 1183 return &disk_to_dev(p)->kobj; 1184} 1185 1186static int exact_lock(dev_t dev, void *data) 1187{ 1188 struct gendisk *p = data; 1189 1190 if (!get_disk(p)) 1191 return -1; 1192 return 0; 1193} 1194 1195void ide_register_region(struct gendisk *disk) 1196{ 1197 blk_register_region(MKDEV(disk->major, disk->first_minor), 1198 disk->minors, NULL, exact_match, exact_lock, disk); 1199} 1200 1201EXPORT_SYMBOL_GPL(ide_register_region); 1202 1203void ide_unregister_region(struct gendisk *disk) 1204{ 1205 blk_unregister_region(MKDEV(disk->major, disk->first_minor), 1206 disk->minors); 1207} 1208 1209EXPORT_SYMBOL_GPL(ide_unregister_region); 1210 1211void ide_init_disk(struct gendisk *disk, ide_drive_t *drive) 1212{ 1213 ide_hwif_t *hwif = drive->hwif; 1214 unsigned int unit = drive->dn & 1; 1215 1216 disk->major = hwif->major; 1217 disk->first_minor = unit << PARTN_BITS; 1218 sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit); 1219 disk->queue = drive->queue; 1220} 1221 1222EXPORT_SYMBOL_GPL(ide_init_disk); 1223 1224static void ide_remove_drive_from_hwgroup(ide_drive_t *drive) 1225{ 1226 ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; 1227 1228 if (drive == drive->next) { 1229 /* special case: last drive from hwgroup. */ 1230 BUG_ON(hwgroup->drive != drive); 1231 hwgroup->drive = NULL; 1232 } else { 1233 ide_drive_t *walk; 1234 1235 walk = hwgroup->drive; 1236 while (walk->next != drive) 1237 walk = walk->next; 1238 walk->next = drive->next; 1239 if (hwgroup->drive == drive) { 1240 hwgroup->drive = drive->next; 1241 hwgroup->hwif = hwgroup->drive->hwif; 1242 } 1243 } 1244 BUG_ON(hwgroup->drive == drive); 1245} 1246 1247static void drive_release_dev (struct device *dev) 1248{ 1249 ide_drive_t *drive = container_of(dev, ide_drive_t, gendev); 1250 1251 ide_proc_unregister_device(drive); 1252 1253 spin_lock_irq(&ide_lock); 1254 ide_remove_drive_from_hwgroup(drive); 1255 kfree(drive->id); 1256 drive->id = NULL; 1257 drive->dev_flags &= ~IDE_DFLAG_PRESENT; 1258 /* Messed up locking ... */ 1259 spin_unlock_irq(&ide_lock); 1260 blk_cleanup_queue(drive->queue); 1261 spin_lock_irq(&ide_lock); 1262 drive->queue = NULL; 1263 spin_unlock_irq(&ide_lock); 1264 1265 complete(&drive->gendev_rel_comp); 1266} 1267 1268static int hwif_init(ide_hwif_t *hwif) 1269{ 1270 int old_irq; 1271 1272 if (!hwif->irq) { 1273 hwif->irq = __ide_default_irq(hwif->io_ports.data_addr); 1274 if (!hwif->irq) { 1275 printk(KERN_ERR "%s: disabled, no IRQ\n", hwif->name); 1276 return 0; 1277 } 1278 } 1279 1280 if (register_blkdev(hwif->major, hwif->name)) 1281 return 0; 1282 1283 if (!hwif->sg_max_nents) 1284 hwif->sg_max_nents = PRD_ENTRIES; 1285 1286 hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents, 1287 GFP_KERNEL); 1288 if (!hwif->sg_table) { 1289 printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name); 1290 goto out; 1291 } 1292 1293 sg_init_table(hwif->sg_table, hwif->sg_max_nents); 1294 1295 if (init_irq(hwif) == 0) 1296 goto done; 1297 1298 old_irq = hwif->irq; 1299 /* 1300 * It failed to initialise. Find the default IRQ for 1301 * this port and try that. 1302 */ 1303 hwif->irq = __ide_default_irq(hwif->io_ports.data_addr); 1304 if (!hwif->irq) { 1305 printk(KERN_ERR "%s: disabled, unable to get IRQ %d\n", 1306 hwif->name, old_irq); 1307 goto out; 1308 } 1309 if (init_irq(hwif)) { 1310 printk(KERN_ERR "%s: probed IRQ %d and default IRQ %d failed\n", 1311 hwif->name, old_irq, hwif->irq); 1312 goto out; 1313 } 1314 printk(KERN_WARNING "%s: probed IRQ %d failed, using default\n", 1315 hwif->name, hwif->irq); 1316 1317done: 1318 blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS, 1319 THIS_MODULE, ata_probe, ata_lock, hwif); 1320 return 1; 1321 1322out: 1323 unregister_blkdev(hwif->major, hwif->name); 1324 return 0; 1325} 1326 1327static void hwif_register_devices(ide_hwif_t *hwif) 1328{ 1329 unsigned int i; 1330 1331 for (i = 0; i < MAX_DRIVES; i++) { 1332 ide_drive_t *drive = &hwif->drives[i]; 1333 struct device *dev = &drive->gendev; 1334 int ret; 1335 1336 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) 1337 continue; 1338 1339 snprintf(dev->bus_id, BUS_ID_SIZE, "%u.%u", hwif->index, i); 1340 dev->parent = &hwif->gendev; 1341 dev->bus = &ide_bus_type; 1342 dev->driver_data = drive; 1343 dev->release = drive_release_dev; 1344 1345 ret = device_register(dev); 1346 if (ret < 0) 1347 printk(KERN_WARNING "IDE: %s: device_register error: " 1348 "%d\n", __func__, ret); 1349 } 1350} 1351 1352static void ide_port_init_devices(ide_hwif_t *hwif) 1353{ 1354 const struct ide_port_ops *port_ops = hwif->port_ops; 1355 int i; 1356 1357 for (i = 0; i < MAX_DRIVES; i++) { 1358 ide_drive_t *drive = &hwif->drives[i]; 1359 1360 drive->dn = i + hwif->channel * 2; 1361 1362 if (hwif->host_flags & IDE_HFLAG_IO_32BIT) 1363 drive->io_32bit = 1; 1364 if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS) 1365 drive->dev_flags |= IDE_DFLAG_UNMASK; 1366 if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS) 1367 drive->dev_flags |= IDE_DFLAG_NO_UNMASK; 1368 1369 if (port_ops && port_ops->init_dev) 1370 port_ops->init_dev(drive); 1371 } 1372} 1373 1374static void ide_init_port(ide_hwif_t *hwif, unsigned int port, 1375 const struct ide_port_info *d) 1376{ 1377 hwif->channel = port; 1378 1379 if (d->chipset) 1380 hwif->chipset = d->chipset; 1381 1382 if (d->init_iops) 1383 d->init_iops(hwif); 1384 1385 if ((!hwif->irq && (d->host_flags & IDE_HFLAG_LEGACY_IRQS)) || 1386 (d->host_flags & IDE_HFLAG_FORCE_LEGACY_IRQS)) 1387 hwif->irq = port ? 15 : 14; 1388 1389 /* ->host_flags may be set by ->init_iops (or even earlier...) */ 1390 hwif->host_flags |= d->host_flags; 1391 hwif->pio_mask = d->pio_mask; 1392 1393 if (d->tp_ops) 1394 hwif->tp_ops = d->tp_ops; 1395 1396 /* ->set_pio_mode for DTC2278 is currently limited to port 0 */ 1397 if (hwif->chipset != ide_dtc2278 || hwif->channel == 0) 1398 hwif->port_ops = d->port_ops; 1399 1400 hwif->swdma_mask = d->swdma_mask; 1401 hwif->mwdma_mask = d->mwdma_mask; 1402 hwif->ultra_mask = d->udma_mask; 1403 1404 if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) { 1405 int rc; 1406 1407 if (d->init_dma) 1408 rc = d->init_dma(hwif, d); 1409 else 1410 rc = ide_hwif_setup_dma(hwif, d); 1411 1412 if (rc < 0) { 1413 printk(KERN_INFO "%s: DMA disabled\n", hwif->name); 1414 hwif->dma_base = 0; 1415 hwif->swdma_mask = 0; 1416 hwif->mwdma_mask = 0; 1417 hwif->ultra_mask = 0; 1418 } else if (d->dma_ops) 1419 hwif->dma_ops = d->dma_ops; 1420 } 1421 1422 if ((d->host_flags & IDE_HFLAG_SERIALIZE) || 1423 ((d->host_flags & IDE_HFLAG_SERIALIZE_DMA) && hwif->dma_base)) { 1424 if (hwif->mate) 1425 hwif->mate->serialized = hwif->serialized = 1; 1426 } 1427 1428 if (d->host_flags & IDE_HFLAG_RQSIZE_256) 1429 hwif->rqsize = 256; 1430 1431 /* call chipset specific routine for each enabled port */ 1432 if (d->init_hwif) 1433 d->init_hwif(hwif); 1434} 1435 1436static void ide_port_cable_detect(ide_hwif_t *hwif) 1437{ 1438 const struct ide_port_ops *port_ops = hwif->port_ops; 1439 1440 if (port_ops && port_ops->cable_detect && (hwif->ultra_mask & 0x78)) { 1441 if (hwif->cbl != ATA_CBL_PATA40_SHORT) 1442 hwif->cbl = port_ops->cable_detect(hwif); 1443 } 1444} 1445 1446static ssize_t store_delete_devices(struct device *portdev, 1447 struct device_attribute *attr, 1448 const char *buf, size_t n) 1449{ 1450 ide_hwif_t *hwif = dev_get_drvdata(portdev); 1451 1452 if (strncmp(buf, "1", n)) 1453 return -EINVAL; 1454 1455 ide_port_unregister_devices(hwif); 1456 1457 return n; 1458}; 1459 1460static DEVICE_ATTR(delete_devices, S_IWUSR, NULL, store_delete_devices); 1461 1462static ssize_t store_scan(struct device *portdev, 1463 struct device_attribute *attr, 1464 const char *buf, size_t n) 1465{ 1466 ide_hwif_t *hwif = dev_get_drvdata(portdev); 1467 1468 if (strncmp(buf, "1", n)) 1469 return -EINVAL; 1470 1471 ide_port_unregister_devices(hwif); 1472 ide_port_scan(hwif); 1473 1474 return n; 1475}; 1476 1477static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan); 1478 1479static struct device_attribute *ide_port_attrs[] = { 1480 &dev_attr_delete_devices, 1481 &dev_attr_scan, 1482 NULL 1483}; 1484 1485static int ide_sysfs_register_port(ide_hwif_t *hwif) 1486{ 1487 int i, uninitialized_var(rc); 1488 1489 for (i = 0; ide_port_attrs[i]; i++) { 1490 rc = device_create_file(hwif->portdev, ide_port_attrs[i]); 1491 if (rc) 1492 break; 1493 } 1494 1495 return rc; 1496} 1497 1498static unsigned int ide_indexes; 1499 1500/** 1501 * ide_find_port_slot - find free port slot 1502 * @d: IDE port info 1503 * 1504 * Return the new port slot index or -ENOENT if we are out of free slots. 1505 */ 1506 1507static int ide_find_port_slot(const struct ide_port_info *d) 1508{ 1509 int idx = -ENOENT; 1510 u8 bootable = (d && (d->host_flags & IDE_HFLAG_NON_BOOTABLE)) ? 0 : 1; 1511 u8 i = (d && (d->host_flags & IDE_HFLAG_QD_2ND_PORT)) ? 1 : 0;; 1512 1513 /* 1514 * Claim an unassigned slot. 1515 * 1516 * Give preference to claiming other slots before claiming ide0/ide1, 1517 * just in case there's another interface yet-to-be-scanned 1518 * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults). 1519 * 1520 * Unless there is a bootable card that does not use the standard 1521 * ports 0x1f0/0x170 (the ide0/ide1 defaults). 1522 */ 1523 mutex_lock(&ide_cfg_mtx); 1524 if (bootable) { 1525 if ((ide_indexes | i) != (1 << MAX_HWIFS) - 1) 1526 idx = ffz(ide_indexes | i); 1527 } else { 1528 if ((ide_indexes | 3) != (1 << MAX_HWIFS) - 1) 1529 idx = ffz(ide_indexes | 3); 1530 else if ((ide_indexes & 3) != 3) 1531 idx = ffz(ide_indexes); 1532 } 1533 if (idx >= 0) 1534 ide_indexes |= (1 << idx); 1535 mutex_unlock(&ide_cfg_mtx); 1536 1537 return idx; 1538} 1539 1540static void ide_free_port_slot(int idx) 1541{ 1542 mutex_lock(&ide_cfg_mtx); 1543 ide_indexes &= ~(1 << idx); 1544 mutex_unlock(&ide_cfg_mtx); 1545} 1546 1547struct ide_host *ide_host_alloc(const struct ide_port_info *d, hw_regs_t **hws) 1548{ 1549 struct ide_host *host; 1550 int i; 1551 1552 host = kzalloc(sizeof(*host), GFP_KERNEL); 1553 if (host == NULL) 1554 return NULL; 1555 1556 for (i = 0; i < MAX_HOST_PORTS; i++) { 1557 ide_hwif_t *hwif; 1558 int idx; 1559 1560 if (hws[i] == NULL) 1561 continue; 1562 1563 hwif = kzalloc(sizeof(*hwif), GFP_KERNEL); 1564 if (hwif == NULL) 1565 continue; 1566 1567 idx = ide_find_port_slot(d); 1568 if (idx < 0) { 1569 printk(KERN_ERR "%s: no free slot for interface\n", 1570 d ? d->name : "ide"); 1571 kfree(hwif); 1572 continue; 1573 } 1574 1575 ide_init_port_data(hwif, idx); 1576 1577 hwif->host = host; 1578 1579 host->ports[i] = hwif; 1580 host->n_ports++; 1581 } 1582 1583 if (host->n_ports == 0) { 1584 kfree(host); 1585 return NULL; 1586 } 1587 1588 if (hws[0]) 1589 host->dev[0] = hws[0]->dev; 1590 1591 if (d) { 1592 host->init_chipset = d->init_chipset; 1593 host->host_flags = d->host_flags; 1594 } 1595 1596 return host; 1597} 1598EXPORT_SYMBOL_GPL(ide_host_alloc); 1599 1600int ide_host_register(struct ide_host *host, const struct ide_port_info *d, 1601 hw_regs_t **hws) 1602{ 1603 ide_hwif_t *hwif, *mate = NULL; 1604 int i, j = 0; 1605 1606 for (i = 0; i < MAX_HOST_PORTS; i++) { 1607 hwif = host->ports[i]; 1608 1609 if (hwif == NULL) { 1610 mate = NULL; 1611 continue; 1612 } 1613 1614 ide_init_port_hw(hwif, hws[i]); 1615 ide_port_apply_params(hwif); 1616 1617 if (d == NULL) { 1618 mate = NULL; 1619 } else { 1620 if ((i & 1) && mate) { 1621 hwif->mate = mate; 1622 mate->mate = hwif; 1623 } 1624 1625 mate = (i & 1) ? NULL : hwif; 1626 1627 ide_init_port(hwif, i & 1, d); 1628 ide_port_cable_detect(hwif); 1629 } 1630 1631 ide_port_init_devices(hwif); 1632 } 1633 1634 for (i = 0; i < MAX_HOST_PORTS; i++) { 1635 hwif = host->ports[i]; 1636 1637 if (hwif == NULL) 1638 continue; 1639 1640 if (ide_probe_port(hwif) == 0) 1641 hwif->present = 1; 1642 1643 if (hwif->chipset != ide_4drives || !hwif->mate || 1644 !hwif->mate->present) 1645 ide_register_port(hwif); 1646 1647 if (hwif->present) 1648 ide_port_tune_devices(hwif); 1649 } 1650 1651 for (i = 0; i < MAX_HOST_PORTS; i++) { 1652 hwif = host->ports[i]; 1653 1654 if (hwif == NULL) 1655 continue; 1656 1657 if (hwif_init(hwif) == 0) { 1658 printk(KERN_INFO "%s: failed to initialize IDE " 1659 "interface\n", hwif->name); 1660 hwif->present = 0; 1661 continue; 1662 } 1663 1664 j++; 1665 1666 if (hwif->present) 1667 ide_port_setup_devices(hwif); 1668 1669 ide_acpi_init(hwif); 1670 1671 if (hwif->present) 1672 ide_acpi_port_init_devices(hwif); 1673 } 1674 1675 for (i = 0; i < MAX_HOST_PORTS; i++) { 1676 hwif = host->ports[i]; 1677 1678 if (hwif == NULL) 1679 continue; 1680 1681 if (hwif->chipset == ide_unknown) 1682 hwif->chipset = ide_generic; 1683 1684 if (hwif->present) 1685 hwif_register_devices(hwif); 1686 } 1687 1688 for (i = 0; i < MAX_HOST_PORTS; i++) { 1689 hwif = host->ports[i]; 1690 1691 if (hwif == NULL) 1692 continue; 1693 1694 ide_sysfs_register_port(hwif); 1695 ide_proc_register_port(hwif); 1696 1697 if (hwif->present) 1698 ide_proc_port_register_devices(hwif); 1699 } 1700 1701 return j ? 0 : -1; 1702} 1703EXPORT_SYMBOL_GPL(ide_host_register); 1704 1705int ide_host_add(const struct ide_port_info *d, hw_regs_t **hws, 1706 struct ide_host **hostp) 1707{ 1708 struct ide_host *host; 1709 int rc; 1710 1711 host = ide_host_alloc(d, hws); 1712 if (host == NULL) 1713 return -ENOMEM; 1714 1715 rc = ide_host_register(host, d, hws); 1716 if (rc) { 1717 ide_host_free(host); 1718 return rc; 1719 } 1720 1721 if (hostp) 1722 *hostp = host; 1723 1724 return 0; 1725} 1726EXPORT_SYMBOL_GPL(ide_host_add); 1727 1728void ide_host_free(struct ide_host *host) 1729{ 1730 ide_hwif_t *hwif; 1731 int i; 1732 1733 for (i = 0; i < MAX_HOST_PORTS; i++) { 1734 hwif = host->ports[i]; 1735 1736 if (hwif == NULL) 1737 continue; 1738 1739 ide_free_port_slot(hwif->index); 1740 kfree(hwif); 1741 } 1742 1743 kfree(host); 1744} 1745EXPORT_SYMBOL_GPL(ide_host_free); 1746 1747void ide_host_remove(struct ide_host *host) 1748{ 1749 int i; 1750 1751 for (i = 0; i < MAX_HOST_PORTS; i++) { 1752 if (host->ports[i]) 1753 ide_unregister(host->ports[i]); 1754 } 1755 1756 ide_host_free(host); 1757} 1758EXPORT_SYMBOL_GPL(ide_host_remove); 1759 1760void ide_port_scan(ide_hwif_t *hwif) 1761{ 1762 ide_port_apply_params(hwif); 1763 ide_port_cable_detect(hwif); 1764 ide_port_init_devices(hwif); 1765 1766 if (ide_probe_port(hwif) < 0) 1767 return; 1768 1769 hwif->present = 1; 1770 1771 ide_port_tune_devices(hwif); 1772 ide_acpi_port_init_devices(hwif); 1773 ide_port_setup_devices(hwif); 1774 hwif_register_devices(hwif); 1775 ide_proc_port_register_devices(hwif); 1776} 1777EXPORT_SYMBOL_GPL(ide_port_scan); 1778 1779static void ide_legacy_init_one(hw_regs_t **hws, hw_regs_t *hw, 1780 u8 port_no, const struct ide_port_info *d, 1781 unsigned long config) 1782{ 1783 unsigned long base, ctl; 1784 int irq; 1785 1786 if (port_no == 0) { 1787 base = 0x1f0; 1788 ctl = 0x3f6; 1789 irq = 14; 1790 } else { 1791 base = 0x170; 1792 ctl = 0x376; 1793 irq = 15; 1794 } 1795 1796 if (!request_region(base, 8, d->name)) { 1797 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n", 1798 d->name, base, base + 7); 1799 return; 1800 } 1801 1802 if (!request_region(ctl, 1, d->name)) { 1803 printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n", 1804 d->name, ctl); 1805 release_region(base, 8); 1806 return; 1807 } 1808 1809 ide_std_init_ports(hw, base, ctl); 1810 hw->irq = irq; 1811 hw->chipset = d->chipset; 1812 hw->config = config; 1813 1814 hws[port_no] = hw; 1815} 1816 1817int ide_legacy_device_add(const struct ide_port_info *d, unsigned long config) 1818{ 1819 hw_regs_t hw[2], *hws[] = { NULL, NULL, NULL, NULL }; 1820 1821 memset(&hw, 0, sizeof(hw)); 1822 1823 if ((d->host_flags & IDE_HFLAG_QD_2ND_PORT) == 0) 1824 ide_legacy_init_one(hws, &hw[0], 0, d, config); 1825 ide_legacy_init_one(hws, &hw[1], 1, d, config); 1826 1827 if (hws[0] == NULL && hws[1] == NULL && 1828 (d->host_flags & IDE_HFLAG_SINGLE)) 1829 return -ENOENT; 1830 1831 return ide_host_add(d, hws, NULL); 1832} 1833EXPORT_SYMBOL_GPL(ide_legacy_device_add); 1834