ide-cd.c revision 116e690f4e69ce0458a9be7010c80b59eb7a99d8
1/* 2 * ATAPI CD-ROM driver. 3 * 4 * Copyright (C) 1994-1996 Scott Snyder <snyder@fnald0.fnal.gov> 5 * Copyright (C) 1996-1998 Erik Andersen <andersee@debian.org> 6 * Copyright (C) 1998-2000 Jens Axboe <axboe@suse.de> 7 * Copyright (C) 2005, 2007 Bartlomiej Zolnierkiewicz 8 * 9 * May be copied or modified under the terms of the GNU General Public 10 * License. See linux/COPYING for more information. 11 * 12 * See Documentation/cdrom/ide-cd for usage information. 13 * 14 * Suggestions are welcome. Patches that work are more welcome though. ;-) 15 * 16 * Documentation: 17 * Mt. Fuji (SFF8090 version 4) and ATAPI (SFF-8020i rev 2.6) standards. 18 * 19 * For historical changelog please see: 20 * Documentation/ide/ChangeLog.ide-cd.1994-2004 21 */ 22 23#define DRV_NAME "ide-cd" 24#define PFX DRV_NAME ": " 25 26#define IDECD_VERSION "5.00" 27 28#include <linux/module.h> 29#include <linux/types.h> 30#include <linux/kernel.h> 31#include <linux/delay.h> 32#include <linux/timer.h> 33#include <linux/slab.h> 34#include <linux/interrupt.h> 35#include <linux/errno.h> 36#include <linux/cdrom.h> 37#include <linux/ide.h> 38#include <linux/completion.h> 39#include <linux/mutex.h> 40#include <linux/bcd.h> 41 42/* For SCSI -> ATAPI command conversion */ 43#include <scsi/scsi.h> 44 45#include <linux/irq.h> 46#include <linux/io.h> 47#include <asm/byteorder.h> 48#include <linux/uaccess.h> 49#include <asm/unaligned.h> 50 51#include "ide-cd.h" 52 53static DEFINE_MUTEX(idecd_ref_mutex); 54 55static void ide_cd_release(struct device *); 56 57static struct cdrom_info *ide_cd_get(struct gendisk *disk) 58{ 59 struct cdrom_info *cd = NULL; 60 61 mutex_lock(&idecd_ref_mutex); 62 cd = ide_drv_g(disk, cdrom_info); 63 if (cd) { 64 if (ide_device_get(cd->drive)) 65 cd = NULL; 66 else 67 get_device(&cd->dev); 68 69 } 70 mutex_unlock(&idecd_ref_mutex); 71 return cd; 72} 73 74static void ide_cd_put(struct cdrom_info *cd) 75{ 76 ide_drive_t *drive = cd->drive; 77 78 mutex_lock(&idecd_ref_mutex); 79 put_device(&cd->dev); 80 ide_device_put(drive); 81 mutex_unlock(&idecd_ref_mutex); 82} 83 84/* 85 * Generic packet command support and error handling routines. 86 */ 87 88/* Mark that we've seen a media change and invalidate our internal buffers. */ 89static void cdrom_saw_media_change(ide_drive_t *drive) 90{ 91 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED; 92 drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID; 93} 94 95static int cdrom_log_sense(ide_drive_t *drive, struct request *rq, 96 struct request_sense *sense) 97{ 98 int log = 0; 99 100 ide_debug_log(IDE_DBG_SENSE, "sense_key: 0x%x", sense->sense_key); 101 102 if (!sense || !rq || (rq->cmd_flags & REQ_QUIET)) 103 return 0; 104 105 switch (sense->sense_key) { 106 case NO_SENSE: 107 case RECOVERED_ERROR: 108 break; 109 case NOT_READY: 110 /* 111 * don't care about tray state messages for e.g. capacity 112 * commands or in-progress or becoming ready 113 */ 114 if (sense->asc == 0x3a || sense->asc == 0x04) 115 break; 116 log = 1; 117 break; 118 case ILLEGAL_REQUEST: 119 /* 120 * don't log START_STOP unit with LoEj set, since we cannot 121 * reliably check if drive can auto-close 122 */ 123 if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24) 124 break; 125 log = 1; 126 break; 127 case UNIT_ATTENTION: 128 /* 129 * Make good and sure we've seen this potential media change. 130 * Some drives (i.e. Creative) fail to present the correct sense 131 * key in the error register. 132 */ 133 cdrom_saw_media_change(drive); 134 break; 135 default: 136 log = 1; 137 break; 138 } 139 return log; 140} 141 142static void cdrom_analyze_sense_data(ide_drive_t *drive, 143 struct request *failed_command, 144 struct request_sense *sense) 145{ 146 unsigned long sector; 147 unsigned long bio_sectors; 148 struct cdrom_info *info = drive->driver_data; 149 150 ide_debug_log(IDE_DBG_SENSE, "error_code: 0x%x, sense_key: 0x%x", 151 sense->error_code, sense->sense_key); 152 153 if (failed_command) 154 ide_debug_log(IDE_DBG_SENSE, "failed cmd: 0x%x", 155 failed_command->cmd[0]); 156 157 if (!cdrom_log_sense(drive, failed_command, sense)) 158 return; 159 160 /* 161 * If a read toc is executed for a CD-R or CD-RW medium where the first 162 * toc has not been recorded yet, it will fail with 05/24/00 (which is a 163 * confusing error) 164 */ 165 if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP) 166 if (sense->sense_key == 0x05 && sense->asc == 0x24) 167 return; 168 169 /* current error */ 170 if (sense->error_code == 0x70) { 171 switch (sense->sense_key) { 172 case MEDIUM_ERROR: 173 case VOLUME_OVERFLOW: 174 case ILLEGAL_REQUEST: 175 if (!sense->valid) 176 break; 177 if (failed_command == NULL || 178 !blk_fs_request(failed_command)) 179 break; 180 sector = (sense->information[0] << 24) | 181 (sense->information[1] << 16) | 182 (sense->information[2] << 8) | 183 (sense->information[3]); 184 185 if (drive->queue->hardsect_size == 2048) 186 /* device sector size is 2K */ 187 sector <<= 2; 188 189 bio_sectors = max(bio_sectors(failed_command->bio), 4U); 190 sector &= ~(bio_sectors - 1); 191 192 /* 193 * The SCSI specification allows for the value 194 * returned by READ CAPACITY to be up to 75 2K 195 * sectors past the last readable block. 196 * Therefore, if we hit a medium error within the 197 * last 75 2K sectors, we decrease the saved size 198 * value. 199 */ 200 if (sector < get_capacity(info->disk) && 201 drive->probed_capacity - sector < 4 * 75) 202 set_capacity(info->disk, sector); 203 } 204 } 205 206 ide_cd_log_error(drive->name, failed_command, sense); 207} 208 209static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense, 210 struct request *failed_command) 211{ 212 struct cdrom_info *info = drive->driver_data; 213 struct request *rq = &drive->request_sense_rq; 214 215 ide_debug_log(IDE_DBG_SENSE, "enter"); 216 217 if (sense == NULL) 218 sense = &info->sense_data; 219 220 /* stuff the sense request in front of our current request */ 221 blk_rq_init(NULL, rq); 222 rq->cmd_type = REQ_TYPE_ATA_PC; 223 rq->rq_disk = info->disk; 224 225 rq->data = sense; 226 rq->cmd[0] = GPCMD_REQUEST_SENSE; 227 rq->cmd[4] = 18; 228 rq->data_len = 18; 229 230 rq->cmd_type = REQ_TYPE_SENSE; 231 rq->cmd_flags |= REQ_PREEMPT; 232 233 /* NOTE! Save the failed command in "rq->buffer" */ 234 rq->buffer = (void *) failed_command; 235 236 if (failed_command) 237 ide_debug_log(IDE_DBG_SENSE, "failed_cmd: 0x%x", 238 failed_command->cmd[0]); 239 240 drive->hwif->rq = NULL; 241 242 elv_add_request(drive->queue, rq, ELEVATOR_INSERT_FRONT, 0); 243} 244 245static void cdrom_end_request(ide_drive_t *drive, int uptodate) 246{ 247 struct request *rq = drive->hwif->rq; 248 int nsectors = rq->hard_cur_sectors; 249 250 ide_debug_log(IDE_DBG_FUNC, "cmd: 0x%x, uptodate: 0x%x, nsectors: %d", 251 rq->cmd[0], uptodate, nsectors); 252 253 if (blk_sense_request(rq) && uptodate) { 254 /* 255 * For REQ_TYPE_SENSE, "rq->buffer" points to the original 256 * failed request 257 */ 258 struct request *failed = (struct request *) rq->buffer; 259 struct cdrom_info *info = drive->driver_data; 260 void *sense = &info->sense_data; 261 262 if (failed) { 263 if (failed->sense) { 264 sense = failed->sense; 265 failed->sense_len = rq->sense_len; 266 } 267 cdrom_analyze_sense_data(drive, failed, sense); 268 /* 269 * now end the failed request 270 */ 271 if (blk_fs_request(failed)) { 272 if (ide_end_rq(drive, failed, -EIO, 273 failed->hard_nr_sectors << 9)) 274 BUG(); 275 } else { 276 if (blk_end_request(failed, -EIO, 277 failed->data_len)) 278 BUG(); 279 } 280 } else 281 cdrom_analyze_sense_data(drive, NULL, sense); 282 } 283 284 if (!rq->current_nr_sectors && blk_fs_request(rq)) 285 uptodate = 1; 286 /* make sure it's fully ended */ 287 if (blk_pc_request(rq)) 288 nsectors = (rq->data_len + 511) >> 9; 289 if (!nsectors) 290 nsectors = 1; 291 292 ide_debug_log(IDE_DBG_FUNC, "uptodate: 0x%x, nsectors: %d", 293 uptodate, nsectors); 294 295 if (blk_fs_request(rq) == 0 && uptodate <= 0 && rq->errors == 0) 296 rq->errors = -EIO; 297 298 ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9); 299} 300 301static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 st) 302{ 303 if (st & 0x80) 304 return; 305 ide_dump_status(drive, msg, st); 306} 307 308/* 309 * Returns: 310 * 0: if the request should be continued. 311 * 1: if the request was ended. 312 */ 313static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret) 314{ 315 ide_hwif_t *hwif = drive->hwif; 316 struct request *rq = hwif->rq; 317 int stat, err, sense_key; 318 319 /* check for errors */ 320 stat = hwif->tp_ops->read_status(hwif); 321 322 if (stat_ret) 323 *stat_ret = stat; 324 325 if (OK_STAT(stat, good_stat, BAD_R_STAT)) 326 return 0; 327 328 /* get the IDE error register */ 329 err = ide_read_error(drive); 330 sense_key = err >> 4; 331 332 if (rq == NULL) { 333 printk(KERN_ERR PFX "%s: missing rq in %s\n", 334 drive->name, __func__); 335 return 1; 336 } 337 338 ide_debug_log(IDE_DBG_RQ, "stat: 0x%x, good_stat: 0x%x, cmd[0]: 0x%x, " 339 "rq->cmd_type: 0x%x, err: 0x%x", 340 stat, good_stat, rq->cmd[0], rq->cmd_type, 341 err); 342 343 if (blk_sense_request(rq)) { 344 /* 345 * We got an error trying to get sense info from the drive 346 * (probably while trying to recover from a former error). 347 * Just give up. 348 */ 349 rq->cmd_flags |= REQ_FAILED; 350 cdrom_end_request(drive, 0); 351 ide_error(drive, "request sense failure", stat); 352 return 1; 353 354 } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) { 355 /* All other functions, except for READ. */ 356 357 /* 358 * if we have an error, pass back CHECK_CONDITION as the 359 * scsi status byte 360 */ 361 if (blk_pc_request(rq) && !rq->errors) 362 rq->errors = SAM_STAT_CHECK_CONDITION; 363 364 /* check for tray open */ 365 if (sense_key == NOT_READY) { 366 cdrom_saw_media_change(drive); 367 } else if (sense_key == UNIT_ATTENTION) { 368 /* check for media change */ 369 cdrom_saw_media_change(drive); 370 return 0; 371 } else if (sense_key == ILLEGAL_REQUEST && 372 rq->cmd[0] == GPCMD_START_STOP_UNIT) { 373 /* 374 * Don't print error message for this condition-- 375 * SFF8090i indicates that 5/24/00 is the correct 376 * response to a request to close the tray if the 377 * drive doesn't have that capability. 378 * cdrom_log_sense() knows this! 379 */ 380 } else if (!(rq->cmd_flags & REQ_QUIET)) { 381 /* otherwise, print an error */ 382 ide_dump_status(drive, "packet command error", stat); 383 } 384 385 rq->cmd_flags |= REQ_FAILED; 386 387 /* 388 * instead of playing games with moving completions around, 389 * remove failed request completely and end it when the 390 * request sense has completed 391 */ 392 goto end_request; 393 394 } else if (blk_fs_request(rq)) { 395 int do_end_request = 0; 396 397 /* handle errors from READ and WRITE requests */ 398 399 if (blk_noretry_request(rq)) 400 do_end_request = 1; 401 402 if (sense_key == NOT_READY) { 403 /* tray open */ 404 if (rq_data_dir(rq) == READ) { 405 cdrom_saw_media_change(drive); 406 407 /* fail the request */ 408 printk(KERN_ERR PFX "%s: tray open\n", 409 drive->name); 410 do_end_request = 1; 411 } else { 412 struct cdrom_info *info = drive->driver_data; 413 414 /* 415 * Allow the drive 5 seconds to recover, some 416 * devices will return this error while flushing 417 * data from cache. 418 */ 419 if (!rq->errors) 420 info->write_timeout = jiffies + 421 ATAPI_WAIT_WRITE_BUSY; 422 rq->errors = 1; 423 if (time_after(jiffies, info->write_timeout)) 424 do_end_request = 1; 425 else { 426 struct request_queue *q = drive->queue; 427 unsigned long flags; 428 429 /* 430 * take a breather relying on the unplug 431 * timer to kick us again 432 */ 433 spin_lock_irqsave(q->queue_lock, flags); 434 blk_plug_device(q); 435 spin_unlock_irqrestore(q->queue_lock, flags); 436 437 return 1; 438 } 439 } 440 } else if (sense_key == UNIT_ATTENTION) { 441 /* media change */ 442 cdrom_saw_media_change(drive); 443 444 /* 445 * Arrange to retry the request but be sure to give up 446 * if we've retried too many times. 447 */ 448 if (++rq->errors > ERROR_MAX) 449 do_end_request = 1; 450 } else if (sense_key == ILLEGAL_REQUEST || 451 sense_key == DATA_PROTECT) { 452 /* 453 * No point in retrying after an illegal request or data 454 * protect error. 455 */ 456 ide_dump_status_no_sense(drive, "command error", stat); 457 do_end_request = 1; 458 } else if (sense_key == MEDIUM_ERROR) { 459 /* 460 * No point in re-trying a zillion times on a bad 461 * sector. If we got here the error is not correctable. 462 */ 463 ide_dump_status_no_sense(drive, 464 "media error (bad sector)", 465 stat); 466 do_end_request = 1; 467 } else if (sense_key == BLANK_CHECK) { 468 /* disk appears blank ?? */ 469 ide_dump_status_no_sense(drive, "media error (blank)", 470 stat); 471 do_end_request = 1; 472 } else if ((err & ~ATA_ABORTED) != 0) { 473 /* go to the default handler for other errors */ 474 ide_error(drive, "cdrom_decode_status", stat); 475 return 1; 476 } else if ((++rq->errors > ERROR_MAX)) { 477 /* we've racked up too many retries, abort */ 478 do_end_request = 1; 479 } 480 481 /* 482 * End a request through request sense analysis when we have 483 * sense data. We need this in order to perform end of media 484 * processing. 485 */ 486 if (do_end_request) 487 goto end_request; 488 489 /* 490 * If we got a CHECK_CONDITION status, queue 491 * a request sense command. 492 */ 493 if (stat & ATA_ERR) 494 cdrom_queue_request_sense(drive, NULL, NULL); 495 } else { 496 blk_dump_rq_flags(rq, PFX "bad rq"); 497 cdrom_end_request(drive, 0); 498 } 499 500 /* retry, or handle the next request */ 501 return 1; 502 503end_request: 504 if (stat & ATA_ERR) { 505 struct request_queue *q = drive->queue; 506 unsigned long flags; 507 508 spin_lock_irqsave(q->queue_lock, flags); 509 blkdev_dequeue_request(rq); 510 spin_unlock_irqrestore(q->queue_lock, flags); 511 512 hwif->rq = NULL; 513 514 cdrom_queue_request_sense(drive, rq->sense, rq); 515 } else 516 cdrom_end_request(drive, 0); 517 518 return 1; 519} 520 521/* 522 * Check the contents of the interrupt reason register from the cdrom 523 * and attempt to recover if there are problems. Returns 0 if everything's 524 * ok; nonzero if the request has been terminated. 525 */ 526static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq, 527 int len, int ireason, int rw) 528{ 529 ide_hwif_t *hwif = drive->hwif; 530 531 ide_debug_log(IDE_DBG_FUNC, "ireason: 0x%x, rw: 0x%x", ireason, rw); 532 533 /* 534 * ireason == 0: the drive wants to receive data from us 535 * ireason == 2: the drive is expecting to transfer data to us 536 */ 537 if (ireason == (!rw << 1)) 538 return 0; 539 else if (ireason == (rw << 1)) { 540 541 /* whoops... */ 542 printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n", 543 drive->name, __func__); 544 545 ide_pad_transfer(drive, rw, len); 546 } else if (rw == 0 && ireason == 1) { 547 /* 548 * Some drives (ASUS) seem to tell us that status info is 549 * available. Just get it and ignore. 550 */ 551 (void)hwif->tp_ops->read_status(hwif); 552 return 0; 553 } else { 554 /* drive wants a command packet, or invalid ireason... */ 555 printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n", 556 drive->name, __func__, ireason); 557 } 558 559 if (rq->cmd_type == REQ_TYPE_ATA_PC) 560 rq->cmd_flags |= REQ_FAILED; 561 562 cdrom_end_request(drive, 0); 563 return -1; 564} 565 566/* 567 * Assume that the drive will always provide data in multiples of at least 568 * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise. 569 */ 570static int ide_cd_check_transfer_size(ide_drive_t *drive, int len) 571{ 572 ide_debug_log(IDE_DBG_FUNC, "len: %d", len); 573 574 if ((len % SECTOR_SIZE) == 0) 575 return 0; 576 577 printk(KERN_ERR PFX "%s: %s: Bad transfer size %d\n", drive->name, 578 __func__, len); 579 580 if (drive->atapi_flags & IDE_AFLAG_LIMIT_NFRAMES) 581 printk(KERN_ERR PFX "This drive is not supported by this " 582 "version of the driver\n"); 583 else { 584 printk(KERN_ERR PFX "Trying to limit transfer sizes\n"); 585 drive->atapi_flags |= IDE_AFLAG_LIMIT_NFRAMES; 586 } 587 588 return 1; 589} 590 591static ide_startstop_t ide_cd_prepare_rw_request(ide_drive_t *drive, 592 struct request *rq) 593{ 594 ide_debug_log(IDE_DBG_RQ, "rq->cmd_flags: 0x%x", rq->cmd_flags); 595 596 if (rq_data_dir(rq) == READ) { 597 unsigned short sectors_per_frame = 598 queue_hardsect_size(drive->queue) >> SECTOR_BITS; 599 int nskip = rq->sector & (sectors_per_frame - 1); 600 601 /* 602 * If the requested sector doesn't start on a frame boundary, 603 * we must adjust the start of the transfer so that it does, 604 * and remember to skip the first few sectors. 605 * 606 * If the rq->current_nr_sectors field is larger than the size 607 * of the buffer, it will mean that we're to skip a number of 608 * sectors equal to the amount by which rq->current_nr_sectors 609 * is larger than the buffer size. 610 */ 611 if (nskip > 0) { 612 /* sanity check... */ 613 if (rq->current_nr_sectors != 614 bio_cur_sectors(rq->bio)) { 615 printk(KERN_ERR PFX "%s: %s: buffer botch (%u)\n", 616 drive->name, __func__, 617 rq->current_nr_sectors); 618 cdrom_end_request(drive, 0); 619 return ide_stopped; 620 } 621 rq->current_nr_sectors += nskip; 622 } 623 } 624 625 /* set up the command */ 626 rq->timeout = ATAPI_WAIT_PC; 627 628 return ide_started; 629} 630 631/* 632 * Fix up a possibly partially-processed request so that we can start it over 633 * entirely, or even put it back on the request queue. 634 */ 635static void ide_cd_restore_request(ide_drive_t *drive, struct request *rq) 636{ 637 638 ide_debug_log(IDE_DBG_FUNC, "enter"); 639 640 if (rq->buffer != bio_data(rq->bio)) { 641 sector_t n = 642 (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE; 643 644 rq->buffer = bio_data(rq->bio); 645 rq->nr_sectors += n; 646 rq->sector -= n; 647 } 648 rq->current_nr_sectors = bio_cur_sectors(rq->bio); 649 rq->hard_cur_sectors = rq->current_nr_sectors; 650 rq->hard_nr_sectors = rq->nr_sectors; 651 rq->hard_sector = rq->sector; 652 rq->q->prep_rq_fn(rq->q, rq); 653} 654 655static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct request *rq) 656{ 657 ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]); 658 659 /* 660 * Some of the trailing request sense fields are optional, 661 * and some drives don't send them. Sigh. 662 */ 663 if (rq->cmd[0] == GPCMD_REQUEST_SENSE && 664 rq->data_len > 0 && rq->data_len <= 5) 665 while (rq->data_len > 0) { 666 *(u8 *)rq->data++ = 0; 667 --rq->data_len; 668 } 669} 670 671int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd, 672 int write, void *buffer, unsigned *bufflen, 673 struct request_sense *sense, int timeout, 674 unsigned int cmd_flags) 675{ 676 struct cdrom_info *info = drive->driver_data; 677 struct request_sense local_sense; 678 int retries = 10; 679 unsigned int flags = 0; 680 681 if (!sense) 682 sense = &local_sense; 683 684 ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, " 685 "cmd_flags: 0x%x", 686 cmd[0], write, timeout, cmd_flags); 687 688 /* start of retry loop */ 689 do { 690 struct request *rq; 691 int error; 692 693 rq = blk_get_request(drive->queue, write, __GFP_WAIT); 694 695 memcpy(rq->cmd, cmd, BLK_MAX_CDB); 696 rq->cmd_type = REQ_TYPE_ATA_PC; 697 rq->sense = sense; 698 rq->cmd_flags |= cmd_flags; 699 rq->timeout = timeout; 700 if (buffer) { 701 rq->data = buffer; 702 rq->data_len = *bufflen; 703 } 704 705 error = blk_execute_rq(drive->queue, info->disk, rq, 0); 706 707 if (buffer) 708 *bufflen = rq->data_len; 709 710 flags = rq->cmd_flags; 711 blk_put_request(rq); 712 713 /* 714 * FIXME: we should probably abort/retry or something in case of 715 * failure. 716 */ 717 if (flags & REQ_FAILED) { 718 /* 719 * The request failed. Retry if it was due to a unit 720 * attention status (usually means media was changed). 721 */ 722 struct request_sense *reqbuf = sense; 723 724 if (reqbuf->sense_key == UNIT_ATTENTION) 725 cdrom_saw_media_change(drive); 726 else if (reqbuf->sense_key == NOT_READY && 727 reqbuf->asc == 4 && reqbuf->ascq != 4) { 728 /* 729 * The drive is in the process of loading 730 * a disk. Retry, but wait a little to give 731 * the drive time to complete the load. 732 */ 733 ssleep(2); 734 } else { 735 /* otherwise, don't retry */ 736 retries = 0; 737 } 738 --retries; 739 } 740 741 /* end of retry loop */ 742 } while ((flags & REQ_FAILED) && retries >= 0); 743 744 /* return an error if the command failed */ 745 return (flags & REQ_FAILED) ? -EIO : 0; 746} 747 748/* 749 * Called from blk_end_request_callback() after the data of the request is 750 * completed and before the request itself is completed. By returning value '1', 751 * blk_end_request_callback() returns immediately without completing it. 752 */ 753static int cdrom_newpc_intr_dummy_cb(struct request *rq) 754{ 755 return 1; 756} 757 758static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive) 759{ 760 ide_hwif_t *hwif = drive->hwif; 761 struct request *rq = hwif->rq; 762 xfer_func_t *xferfunc; 763 ide_expiry_t *expiry = NULL; 764 int dma_error = 0, dma, stat, thislen, uptodate = 0; 765 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0; 766 unsigned int timeout; 767 u16 len; 768 u8 ireason; 769 770 ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x", 771 rq->cmd[0], write); 772 773 /* check for errors */ 774 dma = drive->dma; 775 if (dma) { 776 drive->dma = 0; 777 dma_error = hwif->dma_ops->dma_end(drive); 778 if (dma_error) { 779 printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name, 780 write ? "write" : "read"); 781 ide_dma_off(drive); 782 } 783 } 784 785 if (cdrom_decode_status(drive, 0, &stat)) 786 return ide_stopped; 787 788 /* using dma, transfer is complete now */ 789 if (dma) { 790 if (dma_error) 791 return ide_error(drive, "dma error", stat); 792 if (blk_fs_request(rq)) { 793 ide_complete_rq(drive, 0, rq->nr_sectors 794 ? (rq->nr_sectors << 9) : ide_rq_bytes(rq)); 795 return ide_stopped; 796 } else if (rq->cmd_type == REQ_TYPE_ATA_PC && !rq->bio) { 797 ide_complete_rq(drive, 0, 512); 798 return ide_stopped; 799 } 800 goto end_request; 801 } 802 803 ide_read_bcount_and_ireason(drive, &len, &ireason); 804 805 thislen = blk_fs_request(rq) ? len : rq->data_len; 806 if (thislen > len) 807 thislen = len; 808 809 ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d", 810 stat, thislen); 811 812 /* If DRQ is clear, the command has completed. */ 813 if ((stat & ATA_DRQ) == 0) { 814 if (blk_fs_request(rq)) { 815 /* 816 * If we're not done reading/writing, complain. 817 * Otherwise, complete the command normally. 818 */ 819 uptodate = 1; 820 if (rq->current_nr_sectors > 0) { 821 printk(KERN_ERR PFX "%s: %s: data underrun " 822 "(%d blocks)\n", 823 drive->name, __func__, 824 rq->current_nr_sectors); 825 if (!write) 826 rq->cmd_flags |= REQ_FAILED; 827 uptodate = 0; 828 } 829 cdrom_end_request(drive, uptodate); 830 return ide_stopped; 831 } else if (!blk_pc_request(rq)) { 832 ide_cd_request_sense_fixup(drive, rq); 833 /* complain if we still have data left to transfer */ 834 uptodate = rq->data_len ? 0 : 1; 835 } 836 goto end_request; 837 } 838 839 /* check which way to transfer data */ 840 if (ide_cd_check_ireason(drive, rq, len, ireason, write)) 841 return ide_stopped; 842 843 if (blk_fs_request(rq)) { 844 if (write == 0) { 845 int nskip; 846 847 if (ide_cd_check_transfer_size(drive, len)) { 848 cdrom_end_request(drive, 0); 849 return ide_stopped; 850 } 851 852 /* 853 * First, figure out if we need to bit-bucket 854 * any of the leading sectors. 855 */ 856 nskip = min_t(int, rq->current_nr_sectors 857 - bio_cur_sectors(rq->bio), 858 thislen >> 9); 859 if (nskip > 0) { 860 ide_pad_transfer(drive, write, nskip << 9); 861 rq->current_nr_sectors -= nskip; 862 thislen -= (nskip << 9); 863 } 864 } 865 } 866 867 if (ireason == 0) { 868 write = 1; 869 xferfunc = hwif->tp_ops->output_data; 870 } else { 871 write = 0; 872 xferfunc = hwif->tp_ops->input_data; 873 } 874 875 ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, " 876 "ireason: 0x%x", 877 rq->cmd_type, ireason); 878 879 /* transfer data */ 880 while (thislen > 0) { 881 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data; 882 int blen = rq->data_len; 883 884 /* bio backed? */ 885 if (rq->bio) { 886 if (blk_fs_request(rq)) { 887 ptr = rq->buffer; 888 blen = rq->current_nr_sectors << 9; 889 } else { 890 ptr = bio_data(rq->bio); 891 blen = bio_iovec(rq->bio)->bv_len; 892 } 893 } 894 895 if (!ptr) { 896 if (blk_fs_request(rq) && !write) 897 /* 898 * If the buffers are full, pipe the rest into 899 * oblivion. 900 */ 901 ide_pad_transfer(drive, 0, thislen); 902 else { 903 printk(KERN_ERR PFX "%s: confused, missing data\n", 904 drive->name); 905 blk_dump_rq_flags(rq, rq_data_dir(rq) 906 ? "cdrom_newpc_intr, write" 907 : "cdrom_newpc_intr, read"); 908 } 909 break; 910 } 911 912 if (blen > thislen) 913 blen = thislen; 914 915 xferfunc(drive, NULL, ptr, blen); 916 917 thislen -= blen; 918 len -= blen; 919 920 if (blk_fs_request(rq)) { 921 rq->buffer += blen; 922 rq->nr_sectors -= (blen >> 9); 923 rq->current_nr_sectors -= (blen >> 9); 924 rq->sector += (blen >> 9); 925 926 if (rq->current_nr_sectors == 0 && rq->nr_sectors) 927 cdrom_end_request(drive, 1); 928 } else { 929 rq->data_len -= blen; 930 931 /* 932 * The request can't be completed until DRQ is cleared. 933 * So complete the data, but don't complete the request 934 * using the dummy function for the callback feature 935 * of blk_end_request_callback(). 936 */ 937 if (rq->bio) 938 blk_end_request_callback(rq, 0, blen, 939 cdrom_newpc_intr_dummy_cb); 940 else 941 rq->data += blen; 942 } 943 if (!write && blk_sense_request(rq)) 944 rq->sense_len += blen; 945 } 946 947 /* pad, if necessary */ 948 if (!blk_fs_request(rq) && len > 0) 949 ide_pad_transfer(drive, write, len); 950 951 if (blk_pc_request(rq)) { 952 timeout = rq->timeout; 953 } else { 954 timeout = ATAPI_WAIT_PC; 955 if (!blk_fs_request(rq)) 956 expiry = ide_cd_expiry; 957 } 958 959 hwif->expiry = expiry; 960 ide_set_handler(drive, cdrom_newpc_intr, timeout); 961 return ide_started; 962 963end_request: 964 if (blk_pc_request(rq)) { 965 unsigned int dlen = rq->data_len; 966 967 if (dma) 968 rq->data_len = 0; 969 970 if (blk_end_request(rq, 0, dlen)) 971 BUG(); 972 973 hwif->rq = NULL; 974 } else { 975 if (!uptodate) 976 rq->cmd_flags |= REQ_FAILED; 977 cdrom_end_request(drive, uptodate); 978 } 979 return ide_stopped; 980} 981 982static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq) 983{ 984 struct cdrom_info *cd = drive->driver_data; 985 int write = rq_data_dir(rq) == WRITE; 986 unsigned short sectors_per_frame = 987 queue_hardsect_size(drive->queue) >> SECTOR_BITS; 988 989 ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, write: 0x%x, " 990 "secs_per_frame: %u", 991 rq->cmd[0], write, sectors_per_frame); 992 993 if (write) { 994 /* disk has become write protected */ 995 if (get_disk_ro(cd->disk)) { 996 cdrom_end_request(drive, 0); 997 return ide_stopped; 998 } 999 } else { 1000 /* 1001 * We may be retrying this request after an error. Fix up any 1002 * weirdness which might be present in the request packet. 1003 */ 1004 ide_cd_restore_request(drive, rq); 1005 } 1006 1007 /* use DMA, if possible / writes *must* be hardware frame aligned */ 1008 if ((rq->nr_sectors & (sectors_per_frame - 1)) || 1009 (rq->sector & (sectors_per_frame - 1))) { 1010 if (write) { 1011 cdrom_end_request(drive, 0); 1012 return ide_stopped; 1013 } 1014 drive->dma = 0; 1015 } else 1016 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA); 1017 1018 if (write) 1019 cd->devinfo.media_written = 1; 1020 1021 return ide_started; 1022} 1023 1024static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq) 1025{ 1026 1027 ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x", 1028 rq->cmd[0], rq->cmd_type); 1029 1030 if (blk_pc_request(rq)) 1031 rq->cmd_flags |= REQ_QUIET; 1032 else 1033 rq->cmd_flags &= ~REQ_FAILED; 1034 1035 drive->dma = 0; 1036 1037 /* sg request */ 1038 if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) { 1039 struct request_queue *q = drive->queue; 1040 unsigned int alignment; 1041 char *buf; 1042 1043 if (rq->bio) 1044 buf = bio_data(rq->bio); 1045 else 1046 buf = rq->data; 1047 1048 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA); 1049 1050 /* 1051 * check if dma is safe 1052 * 1053 * NOTE! The "len" and "addr" checks should possibly have 1054 * separate masks. 1055 */ 1056 alignment = queue_dma_alignment(q) | q->dma_pad_mask; 1057 if ((unsigned long)buf & alignment 1058 || rq->data_len & q->dma_pad_mask 1059 || object_is_on_stack(buf)) 1060 drive->dma = 0; 1061 } 1062} 1063 1064static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq, 1065 sector_t block) 1066{ 1067 struct ide_cmd cmd; 1068 1069 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu", 1070 rq->cmd[0], (unsigned long long)block); 1071 1072 if (drive->debug_mask & IDE_DBG_RQ) 1073 blk_dump_rq_flags(rq, "ide_cd_do_request"); 1074 1075 if (blk_fs_request(rq)) { 1076 if (cdrom_start_rw(drive, rq) == ide_stopped) 1077 return ide_stopped; 1078 1079 if (ide_cd_prepare_rw_request(drive, rq) == ide_stopped) 1080 return ide_stopped; 1081 } else if (blk_sense_request(rq) || blk_pc_request(rq) || 1082 rq->cmd_type == REQ_TYPE_ATA_PC) { 1083 if (!rq->timeout) 1084 rq->timeout = ATAPI_WAIT_PC; 1085 1086 cdrom_do_block_pc(drive, rq); 1087 } else if (blk_special_request(rq)) { 1088 /* right now this can only be a reset... */ 1089 cdrom_end_request(drive, 1); 1090 return ide_stopped; 1091 } else { 1092 blk_dump_rq_flags(rq, DRV_NAME " bad flags"); 1093 cdrom_end_request(drive, 0); 1094 return ide_stopped; 1095 } 1096 1097 memset(&cmd, 0, sizeof(cmd)); 1098 1099 if (rq_data_dir(rq)) 1100 cmd.tf_flags |= IDE_TFLAG_WRITE; 1101 1102 cmd.rq = rq; 1103 1104 return ide_issue_pc(drive, &cmd); 1105} 1106 1107/* 1108 * Ioctl handling. 1109 * 1110 * Routines which queue packet commands take as a final argument a pointer to a 1111 * request_sense struct. If execution of the command results in an error with a 1112 * CHECK CONDITION status, this structure will be filled with the results of the 1113 * subsequent request sense command. The pointer can also be NULL, in which case 1114 * no sense information is returned. 1115 */ 1116static void msf_from_bcd(struct atapi_msf *msf) 1117{ 1118 msf->minute = bcd2bin(msf->minute); 1119 msf->second = bcd2bin(msf->second); 1120 msf->frame = bcd2bin(msf->frame); 1121} 1122 1123int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense) 1124{ 1125 struct cdrom_info *info = drive->driver_data; 1126 struct cdrom_device_info *cdi = &info->devinfo; 1127 unsigned char cmd[BLK_MAX_CDB]; 1128 1129 ide_debug_log(IDE_DBG_FUNC, "enter"); 1130 1131 memset(cmd, 0, BLK_MAX_CDB); 1132 cmd[0] = GPCMD_TEST_UNIT_READY; 1133 1134 /* 1135 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs 1136 * instead of supporting the LOAD_UNLOAD opcode. 1137 */ 1138 cmd[7] = cdi->sanyo_slot % 3; 1139 1140 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET); 1141} 1142 1143static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity, 1144 unsigned long *sectors_per_frame, 1145 struct request_sense *sense) 1146{ 1147 struct { 1148 __be32 lba; 1149 __be32 blocklen; 1150 } capbuf; 1151 1152 int stat; 1153 unsigned char cmd[BLK_MAX_CDB]; 1154 unsigned len = sizeof(capbuf); 1155 u32 blocklen; 1156 1157 ide_debug_log(IDE_DBG_FUNC, "enter"); 1158 1159 memset(cmd, 0, BLK_MAX_CDB); 1160 cmd[0] = GPCMD_READ_CDVD_CAPACITY; 1161 1162 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0, 1163 REQ_QUIET); 1164 if (stat) 1165 return stat; 1166 1167 /* 1168 * Sanity check the given block size 1169 */ 1170 blocklen = be32_to_cpu(capbuf.blocklen); 1171 switch (blocklen) { 1172 case 512: 1173 case 1024: 1174 case 2048: 1175 case 4096: 1176 break; 1177 default: 1178 printk(KERN_ERR PFX "%s: weird block size %u\n", 1179 drive->name, blocklen); 1180 printk(KERN_ERR PFX "%s: default to 2kb block size\n", 1181 drive->name); 1182 blocklen = 2048; 1183 break; 1184 } 1185 1186 *capacity = 1 + be32_to_cpu(capbuf.lba); 1187 *sectors_per_frame = blocklen >> SECTOR_BITS; 1188 1189 ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu", 1190 *capacity, *sectors_per_frame); 1191 1192 return 0; 1193} 1194 1195static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag, 1196 int format, char *buf, int buflen, 1197 struct request_sense *sense) 1198{ 1199 unsigned char cmd[BLK_MAX_CDB]; 1200 1201 ide_debug_log(IDE_DBG_FUNC, "enter"); 1202 1203 memset(cmd, 0, BLK_MAX_CDB); 1204 1205 cmd[0] = GPCMD_READ_TOC_PMA_ATIP; 1206 cmd[6] = trackno; 1207 cmd[7] = (buflen >> 8); 1208 cmd[8] = (buflen & 0xff); 1209 cmd[9] = (format << 6); 1210 1211 if (msf_flag) 1212 cmd[1] = 2; 1213 1214 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET); 1215} 1216 1217/* Try to read the entire TOC for the disk into our internal buffer. */ 1218int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense) 1219{ 1220 int stat, ntracks, i; 1221 struct cdrom_info *info = drive->driver_data; 1222 struct cdrom_device_info *cdi = &info->devinfo; 1223 struct atapi_toc *toc = info->toc; 1224 struct { 1225 struct atapi_toc_header hdr; 1226 struct atapi_toc_entry ent; 1227 } ms_tmp; 1228 long last_written; 1229 unsigned long sectors_per_frame = SECTORS_PER_FRAME; 1230 1231 ide_debug_log(IDE_DBG_FUNC, "enter"); 1232 1233 if (toc == NULL) { 1234 /* try to allocate space */ 1235 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL); 1236 if (toc == NULL) { 1237 printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n", 1238 drive->name); 1239 return -ENOMEM; 1240 } 1241 info->toc = toc; 1242 } 1243 1244 /* 1245 * Check to see if the existing data is still valid. If it is, 1246 * just return. 1247 */ 1248 (void) cdrom_check_status(drive, sense); 1249 1250 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID) 1251 return 0; 1252 1253 /* try to get the total cdrom capacity and sector size */ 1254 stat = cdrom_read_capacity(drive, &toc->capacity, §ors_per_frame, 1255 sense); 1256 if (stat) 1257 toc->capacity = 0x1fffff; 1258 1259 set_capacity(info->disk, toc->capacity * sectors_per_frame); 1260 /* save a private copy of the TOC capacity for error handling */ 1261 drive->probed_capacity = toc->capacity * sectors_per_frame; 1262 1263 blk_queue_hardsect_size(drive->queue, 1264 sectors_per_frame << SECTOR_BITS); 1265 1266 /* first read just the header, so we know how long the TOC is */ 1267 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr, 1268 sizeof(struct atapi_toc_header), sense); 1269 if (stat) 1270 return stat; 1271 1272 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1273 toc->hdr.first_track = bcd2bin(toc->hdr.first_track); 1274 toc->hdr.last_track = bcd2bin(toc->hdr.last_track); 1275 } 1276 1277 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1; 1278 if (ntracks <= 0) 1279 return -EIO; 1280 if (ntracks > MAX_TRACKS) 1281 ntracks = MAX_TRACKS; 1282 1283 /* now read the whole schmeer */ 1284 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0, 1285 (char *)&toc->hdr, 1286 sizeof(struct atapi_toc_header) + 1287 (ntracks + 1) * 1288 sizeof(struct atapi_toc_entry), sense); 1289 1290 if (stat && toc->hdr.first_track > 1) { 1291 /* 1292 * Cds with CDI tracks only don't have any TOC entries, despite 1293 * of this the returned values are 1294 * first_track == last_track = number of CDI tracks + 1, 1295 * so that this case is indistinguishable from the same layout 1296 * plus an additional audio track. If we get an error for the 1297 * regular case, we assume a CDI without additional audio 1298 * tracks. In this case the readable TOC is empty (CDI tracks 1299 * are not included) and only holds the Leadout entry. 1300 * 1301 * Heiko Eißfeldt. 1302 */ 1303 ntracks = 0; 1304 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0, 1305 (char *)&toc->hdr, 1306 sizeof(struct atapi_toc_header) + 1307 (ntracks + 1) * 1308 sizeof(struct atapi_toc_entry), 1309 sense); 1310 if (stat) 1311 return stat; 1312 1313 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1314 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT); 1315 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT); 1316 } else { 1317 toc->hdr.first_track = CDROM_LEADOUT; 1318 toc->hdr.last_track = CDROM_LEADOUT; 1319 } 1320 } 1321 1322 if (stat) 1323 return stat; 1324 1325 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length); 1326 1327 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1328 toc->hdr.first_track = bcd2bin(toc->hdr.first_track); 1329 toc->hdr.last_track = bcd2bin(toc->hdr.last_track); 1330 } 1331 1332 for (i = 0; i <= ntracks; i++) { 1333 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) { 1334 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) 1335 toc->ent[i].track = bcd2bin(toc->ent[i].track); 1336 msf_from_bcd(&toc->ent[i].addr.msf); 1337 } 1338 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute, 1339 toc->ent[i].addr.msf.second, 1340 toc->ent[i].addr.msf.frame); 1341 } 1342 1343 if (toc->hdr.first_track != CDROM_LEADOUT) { 1344 /* read the multisession information */ 1345 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp, 1346 sizeof(ms_tmp), sense); 1347 if (stat) 1348 return stat; 1349 1350 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba); 1351 } else { 1352 ms_tmp.hdr.last_track = CDROM_LEADOUT; 1353 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track; 1354 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */ 1355 } 1356 1357 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) { 1358 /* re-read multisession information using MSF format */ 1359 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp, 1360 sizeof(ms_tmp), sense); 1361 if (stat) 1362 return stat; 1363 1364 msf_from_bcd(&ms_tmp.ent.addr.msf); 1365 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute, 1366 ms_tmp.ent.addr.msf.second, 1367 ms_tmp.ent.addr.msf.frame); 1368 } 1369 1370 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track); 1371 1372 /* now try to get the total cdrom capacity */ 1373 stat = cdrom_get_last_written(cdi, &last_written); 1374 if (!stat && (last_written > toc->capacity)) { 1375 toc->capacity = last_written; 1376 set_capacity(info->disk, toc->capacity * sectors_per_frame); 1377 drive->probed_capacity = toc->capacity * sectors_per_frame; 1378 } 1379 1380 /* Remember that we've read this stuff. */ 1381 drive->atapi_flags |= IDE_AFLAG_TOC_VALID; 1382 1383 return 0; 1384} 1385 1386int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf) 1387{ 1388 struct cdrom_info *info = drive->driver_data; 1389 struct cdrom_device_info *cdi = &info->devinfo; 1390 struct packet_command cgc; 1391 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE; 1392 1393 ide_debug_log(IDE_DBG_FUNC, "enter"); 1394 1395 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0) 1396 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE; 1397 1398 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN); 1399 do { 1400 /* we seem to get stat=0x01,err=0x00 the first time (??) */ 1401 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0); 1402 if (!stat) 1403 break; 1404 } while (--attempts); 1405 return stat; 1406} 1407 1408void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf) 1409{ 1410 struct cdrom_info *cd = drive->driver_data; 1411 u16 curspeed, maxspeed; 1412 1413 ide_debug_log(IDE_DBG_FUNC, "enter"); 1414 1415 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) { 1416 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]); 1417 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]); 1418 } else { 1419 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]); 1420 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]); 1421 } 1422 1423 ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u", 1424 curspeed, maxspeed); 1425 1426 cd->current_speed = (curspeed + (176/2)) / 176; 1427 cd->max_speed = (maxspeed + (176/2)) / 176; 1428} 1429 1430#define IDE_CD_CAPABILITIES \ 1431 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \ 1432 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \ 1433 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \ 1434 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \ 1435 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM) 1436 1437static struct cdrom_device_ops ide_cdrom_dops = { 1438 .open = ide_cdrom_open_real, 1439 .release = ide_cdrom_release_real, 1440 .drive_status = ide_cdrom_drive_status, 1441 .media_changed = ide_cdrom_check_media_change_real, 1442 .tray_move = ide_cdrom_tray_move, 1443 .lock_door = ide_cdrom_lock_door, 1444 .select_speed = ide_cdrom_select_speed, 1445 .get_last_session = ide_cdrom_get_last_session, 1446 .get_mcn = ide_cdrom_get_mcn, 1447 .reset = ide_cdrom_reset, 1448 .audio_ioctl = ide_cdrom_audio_ioctl, 1449 .capability = IDE_CD_CAPABILITIES, 1450 .generic_packet = ide_cdrom_packet, 1451}; 1452 1453static int ide_cdrom_register(ide_drive_t *drive, int nslots) 1454{ 1455 struct cdrom_info *info = drive->driver_data; 1456 struct cdrom_device_info *devinfo = &info->devinfo; 1457 1458 ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots); 1459 1460 devinfo->ops = &ide_cdrom_dops; 1461 devinfo->speed = info->current_speed; 1462 devinfo->capacity = nslots; 1463 devinfo->handle = drive; 1464 strcpy(devinfo->name, drive->name); 1465 1466 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT) 1467 devinfo->mask |= CDC_SELECT_SPEED; 1468 1469 devinfo->disk = info->disk; 1470 return register_cdrom(devinfo); 1471} 1472 1473static int ide_cdrom_probe_capabilities(ide_drive_t *drive) 1474{ 1475 struct cdrom_info *cd = drive->driver_data; 1476 struct cdrom_device_info *cdi = &cd->devinfo; 1477 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE]; 1478 mechtype_t mechtype; 1479 int nslots = 1; 1480 1481 ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx", 1482 drive->media, drive->atapi_flags); 1483 1484 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R | 1485 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO | 1486 CDC_MO_DRIVE | CDC_RAM); 1487 1488 if (drive->media == ide_optical) { 1489 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM); 1490 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n", 1491 drive->name); 1492 return nslots; 1493 } 1494 1495 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) { 1496 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT; 1497 cdi->mask &= ~CDC_PLAY_AUDIO; 1498 return nslots; 1499 } 1500 1501 /* 1502 * We have to cheat a little here. the packet will eventually be queued 1503 * with ide_cdrom_packet(), which extracts the drive from cdi->handle. 1504 * Since this device hasn't been registered with the Uniform layer yet, 1505 * it can't do this. Same goes for cdi->ops. 1506 */ 1507 cdi->handle = drive; 1508 cdi->ops = &ide_cdrom_dops; 1509 1510 if (ide_cdrom_get_capabilities(drive, buf)) 1511 return 0; 1512 1513 if ((buf[8 + 6] & 0x01) == 0) 1514 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING; 1515 if (buf[8 + 6] & 0x08) 1516 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT; 1517 if (buf[8 + 3] & 0x01) 1518 cdi->mask &= ~CDC_CD_R; 1519 if (buf[8 + 3] & 0x02) 1520 cdi->mask &= ~(CDC_CD_RW | CDC_RAM); 1521 if (buf[8 + 2] & 0x38) 1522 cdi->mask &= ~CDC_DVD; 1523 if (buf[8 + 3] & 0x20) 1524 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM); 1525 if (buf[8 + 3] & 0x10) 1526 cdi->mask &= ~CDC_DVD_R; 1527 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK)) 1528 cdi->mask &= ~CDC_PLAY_AUDIO; 1529 1530 mechtype = buf[8 + 6] >> 5; 1531 if (mechtype == mechtype_caddy || 1532 mechtype == mechtype_popup || 1533 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE)) 1534 cdi->mask |= CDC_CLOSE_TRAY; 1535 1536 if (cdi->sanyo_slot > 0) { 1537 cdi->mask &= ~CDC_SELECT_DISC; 1538 nslots = 3; 1539 } else if (mechtype == mechtype_individual_changer || 1540 mechtype == mechtype_cartridge_changer) { 1541 nslots = cdrom_number_of_slots(cdi); 1542 if (nslots > 1) 1543 cdi->mask &= ~CDC_SELECT_DISC; 1544 } 1545 1546 ide_cdrom_update_speed(drive, buf); 1547 1548 printk(KERN_INFO PFX "%s: ATAPI", drive->name); 1549 1550 /* don't print speed if the drive reported 0 */ 1551 if (cd->max_speed) 1552 printk(KERN_CONT " %dX", cd->max_speed); 1553 1554 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM"); 1555 1556 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0) 1557 printk(KERN_CONT " DVD%s%s", 1558 (cdi->mask & CDC_DVD_R) ? "" : "-R", 1559 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM"); 1560 1561 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0) 1562 printk(KERN_CONT " CD%s%s", 1563 (cdi->mask & CDC_CD_R) ? "" : "-R", 1564 (cdi->mask & CDC_CD_RW) ? "" : "/RW"); 1565 1566 if ((cdi->mask & CDC_SELECT_DISC) == 0) 1567 printk(KERN_CONT " changer w/%d slots", nslots); 1568 else 1569 printk(KERN_CONT " drive"); 1570 1571 printk(KERN_CONT ", %dkB Cache\n", 1572 be16_to_cpup((__be16 *)&buf[8 + 12])); 1573 1574 return nslots; 1575} 1576 1577/* standard prep_rq_fn that builds 10 byte cmds */ 1578static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq) 1579{ 1580 int hard_sect = queue_hardsect_size(q); 1581 long block = (long)rq->hard_sector / (hard_sect >> 9); 1582 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9); 1583 1584 memset(rq->cmd, 0, BLK_MAX_CDB); 1585 1586 if (rq_data_dir(rq) == READ) 1587 rq->cmd[0] = GPCMD_READ_10; 1588 else 1589 rq->cmd[0] = GPCMD_WRITE_10; 1590 1591 /* 1592 * fill in lba 1593 */ 1594 rq->cmd[2] = (block >> 24) & 0xff; 1595 rq->cmd[3] = (block >> 16) & 0xff; 1596 rq->cmd[4] = (block >> 8) & 0xff; 1597 rq->cmd[5] = block & 0xff; 1598 1599 /* 1600 * and transfer length 1601 */ 1602 rq->cmd[7] = (blocks >> 8) & 0xff; 1603 rq->cmd[8] = blocks & 0xff; 1604 rq->cmd_len = 10; 1605 return BLKPREP_OK; 1606} 1607 1608/* 1609 * Most of the SCSI commands are supported directly by ATAPI devices. 1610 * This transform handles the few exceptions. 1611 */ 1612static int ide_cdrom_prep_pc(struct request *rq) 1613{ 1614 u8 *c = rq->cmd; 1615 1616 /* transform 6-byte read/write commands to the 10-byte version */ 1617 if (c[0] == READ_6 || c[0] == WRITE_6) { 1618 c[8] = c[4]; 1619 c[5] = c[3]; 1620 c[4] = c[2]; 1621 c[3] = c[1] & 0x1f; 1622 c[2] = 0; 1623 c[1] &= 0xe0; 1624 c[0] += (READ_10 - READ_6); 1625 rq->cmd_len = 10; 1626 return BLKPREP_OK; 1627 } 1628 1629 /* 1630 * it's silly to pretend we understand 6-byte sense commands, just 1631 * reject with ILLEGAL_REQUEST and the caller should take the 1632 * appropriate action 1633 */ 1634 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) { 1635 rq->errors = ILLEGAL_REQUEST; 1636 return BLKPREP_KILL; 1637 } 1638 1639 return BLKPREP_OK; 1640} 1641 1642static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq) 1643{ 1644 if (blk_fs_request(rq)) 1645 return ide_cdrom_prep_fs(q, rq); 1646 else if (blk_pc_request(rq)) 1647 return ide_cdrom_prep_pc(rq); 1648 1649 return 0; 1650} 1651 1652struct cd_list_entry { 1653 const char *id_model; 1654 const char *id_firmware; 1655 unsigned int cd_flags; 1656}; 1657 1658#ifdef CONFIG_IDE_PROC_FS 1659static sector_t ide_cdrom_capacity(ide_drive_t *drive) 1660{ 1661 unsigned long capacity, sectors_per_frame; 1662 1663 if (cdrom_read_capacity(drive, &capacity, §ors_per_frame, NULL)) 1664 return 0; 1665 1666 return capacity * sectors_per_frame; 1667} 1668 1669static int proc_idecd_read_capacity(char *page, char **start, off_t off, 1670 int count, int *eof, void *data) 1671{ 1672 ide_drive_t *drive = data; 1673 int len; 1674 1675 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive)); 1676 PROC_IDE_READ_RETURN(page, start, off, count, eof, len); 1677} 1678 1679static ide_proc_entry_t idecd_proc[] = { 1680 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL }, 1681 { NULL, 0, NULL, NULL } 1682}; 1683 1684static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive) 1685{ 1686 return idecd_proc; 1687} 1688 1689static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive) 1690{ 1691 return NULL; 1692} 1693#endif 1694 1695static const struct cd_list_entry ide_cd_quirks_list[] = { 1696 /* Limit transfer size per interrupt. */ 1697 { "SAMSUNG CD-ROM SCR-2430", NULL, IDE_AFLAG_LIMIT_NFRAMES }, 1698 { "SAMSUNG CD-ROM SCR-2432", NULL, IDE_AFLAG_LIMIT_NFRAMES }, 1699 /* SCR-3231 doesn't support the SET_CD_SPEED command. */ 1700 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT }, 1701 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */ 1702 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD | 1703 IDE_AFLAG_PRE_ATAPI12, }, 1704 /* Vertos 300, some versions of this drive like to talk BCD. */ 1705 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, }, 1706 /* Vertos 600 ESD. */ 1707 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, }, 1708 /* 1709 * Sanyo 3 CD changer uses a non-standard command for CD changing 1710 * (by default standard ATAPI support for CD changers is used). 1711 */ 1712 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD }, 1713 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD }, 1714 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD }, 1715 /* Stingray 8X CD-ROM. */ 1716 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 }, 1717 /* 1718 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length 1719 * mode sense page capabilities size, but older drives break. 1720 */ 1721 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE }, 1722 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE }, 1723 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */ 1724 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS }, 1725 /* 1726 * Some drives used by Apple don't advertise audio play 1727 * but they do support reading TOC & audio datas. 1728 */ 1729 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1730 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1731 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1732 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1733 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1734 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1735 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE }, 1736 { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE }, 1737 { NULL, NULL, 0 } 1738}; 1739 1740static unsigned int ide_cd_flags(u16 *id) 1741{ 1742 const struct cd_list_entry *cle = ide_cd_quirks_list; 1743 1744 while (cle->id_model) { 1745 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 && 1746 (cle->id_firmware == NULL || 1747 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware))) 1748 return cle->cd_flags; 1749 cle++; 1750 } 1751 1752 return 0; 1753} 1754 1755static int ide_cdrom_setup(ide_drive_t *drive) 1756{ 1757 struct cdrom_info *cd = drive->driver_data; 1758 struct cdrom_device_info *cdi = &cd->devinfo; 1759 u16 *id = drive->id; 1760 char *fw_rev = (char *)&id[ATA_ID_FW_REV]; 1761 int nslots; 1762 1763 ide_debug_log(IDE_DBG_PROBE, "enter"); 1764 1765 blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn); 1766 blk_queue_dma_alignment(drive->queue, 31); 1767 blk_queue_update_dma_pad(drive->queue, 15); 1768 drive->queue->unplug_delay = (1 * HZ) / 1000; 1769 if (!drive->queue->unplug_delay) 1770 drive->queue->unplug_delay = 1; 1771 1772 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED; 1773 drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id); 1774 1775 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) && 1776 fw_rev[4] == '1' && fw_rev[6] <= '2') 1777 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD | 1778 IDE_AFLAG_TOCADDR_AS_BCD); 1779 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) && 1780 fw_rev[4] == '1' && fw_rev[6] <= '2') 1781 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD; 1782 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD) 1783 /* 3 => use CD in slot 0 */ 1784 cdi->sanyo_slot = 3; 1785 1786 nslots = ide_cdrom_probe_capabilities(drive); 1787 1788 /* set correct block size */ 1789 blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE); 1790 1791 if (ide_cdrom_register(drive, nslots)) { 1792 printk(KERN_ERR PFX "%s: %s failed to register device with the" 1793 " cdrom driver.\n", drive->name, __func__); 1794 cd->devinfo.handle = NULL; 1795 return 1; 1796 } 1797 1798 ide_proc_register_driver(drive, cd->driver); 1799 return 0; 1800} 1801 1802static void ide_cd_remove(ide_drive_t *drive) 1803{ 1804 struct cdrom_info *info = drive->driver_data; 1805 1806 ide_debug_log(IDE_DBG_FUNC, "enter"); 1807 1808 ide_proc_unregister_driver(drive, info->driver); 1809 device_del(&info->dev); 1810 del_gendisk(info->disk); 1811 1812 mutex_lock(&idecd_ref_mutex); 1813 put_device(&info->dev); 1814 mutex_unlock(&idecd_ref_mutex); 1815} 1816 1817static void ide_cd_release(struct device *dev) 1818{ 1819 struct cdrom_info *info = to_ide_drv(dev, cdrom_info); 1820 struct cdrom_device_info *devinfo = &info->devinfo; 1821 ide_drive_t *drive = info->drive; 1822 struct gendisk *g = info->disk; 1823 1824 ide_debug_log(IDE_DBG_FUNC, "enter"); 1825 1826 kfree(info->toc); 1827 if (devinfo->handle == drive) 1828 unregister_cdrom(devinfo); 1829 drive->driver_data = NULL; 1830 blk_queue_prep_rq(drive->queue, NULL); 1831 g->private_data = NULL; 1832 put_disk(g); 1833 kfree(info); 1834} 1835 1836static int ide_cd_probe(ide_drive_t *); 1837 1838static struct ide_driver ide_cdrom_driver = { 1839 .gen_driver = { 1840 .owner = THIS_MODULE, 1841 .name = "ide-cdrom", 1842 .bus = &ide_bus_type, 1843 }, 1844 .probe = ide_cd_probe, 1845 .remove = ide_cd_remove, 1846 .version = IDECD_VERSION, 1847 .do_request = ide_cd_do_request, 1848#ifdef CONFIG_IDE_PROC_FS 1849 .proc_entries = ide_cd_proc_entries, 1850 .proc_devsets = ide_cd_proc_devsets, 1851#endif 1852}; 1853 1854static int idecd_open(struct block_device *bdev, fmode_t mode) 1855{ 1856 struct cdrom_info *info = ide_cd_get(bdev->bd_disk); 1857 int rc = -ENOMEM; 1858 1859 if (!info) 1860 return -ENXIO; 1861 1862 rc = cdrom_open(&info->devinfo, bdev, mode); 1863 1864 if (rc < 0) 1865 ide_cd_put(info); 1866 1867 return rc; 1868} 1869 1870static int idecd_release(struct gendisk *disk, fmode_t mode) 1871{ 1872 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 1873 1874 cdrom_release(&info->devinfo, mode); 1875 1876 ide_cd_put(info); 1877 1878 return 0; 1879} 1880 1881static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg) 1882{ 1883 struct packet_command cgc; 1884 char buffer[16]; 1885 int stat; 1886 char spindown; 1887 1888 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char))) 1889 return -EFAULT; 1890 1891 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN); 1892 1893 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0); 1894 if (stat) 1895 return stat; 1896 1897 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f); 1898 return cdrom_mode_select(cdi, &cgc); 1899} 1900 1901static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg) 1902{ 1903 struct packet_command cgc; 1904 char buffer[16]; 1905 int stat; 1906 char spindown; 1907 1908 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN); 1909 1910 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0); 1911 if (stat) 1912 return stat; 1913 1914 spindown = buffer[11] & 0x0f; 1915 if (copy_to_user((void __user *)arg, &spindown, sizeof(char))) 1916 return -EFAULT; 1917 return 0; 1918} 1919 1920static int idecd_ioctl(struct block_device *bdev, fmode_t mode, 1921 unsigned int cmd, unsigned long arg) 1922{ 1923 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info); 1924 int err; 1925 1926 switch (cmd) { 1927 case CDROMSETSPINDOWN: 1928 return idecd_set_spindown(&info->devinfo, arg); 1929 case CDROMGETSPINDOWN: 1930 return idecd_get_spindown(&info->devinfo, arg); 1931 default: 1932 break; 1933 } 1934 1935 err = generic_ide_ioctl(info->drive, bdev, cmd, arg); 1936 if (err == -EINVAL) 1937 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg); 1938 1939 return err; 1940} 1941 1942static int idecd_media_changed(struct gendisk *disk) 1943{ 1944 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 1945 return cdrom_media_changed(&info->devinfo); 1946} 1947 1948static int idecd_revalidate_disk(struct gendisk *disk) 1949{ 1950 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 1951 struct request_sense sense; 1952 1953 ide_cd_read_toc(info->drive, &sense); 1954 1955 return 0; 1956} 1957 1958static struct block_device_operations idecd_ops = { 1959 .owner = THIS_MODULE, 1960 .open = idecd_open, 1961 .release = idecd_release, 1962 .locked_ioctl = idecd_ioctl, 1963 .media_changed = idecd_media_changed, 1964 .revalidate_disk = idecd_revalidate_disk 1965}; 1966 1967/* module options */ 1968static char *ignore; 1969module_param(ignore, charp, 0400); 1970 1971static unsigned long debug_mask; 1972module_param(debug_mask, ulong, 0644); 1973 1974MODULE_DESCRIPTION("ATAPI CD-ROM Driver"); 1975 1976static int ide_cd_probe(ide_drive_t *drive) 1977{ 1978 struct cdrom_info *info; 1979 struct gendisk *g; 1980 struct request_sense sense; 1981 1982 ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x", 1983 drive->driver_req, drive->media); 1984 1985 if (!strstr("ide-cdrom", drive->driver_req)) 1986 goto failed; 1987 1988 if (drive->media != ide_cdrom && drive->media != ide_optical) 1989 goto failed; 1990 1991 /* skip drives that we were told to ignore */ 1992 if (ignore != NULL) { 1993 if (strstr(ignore, drive->name)) { 1994 printk(KERN_INFO PFX "ignoring drive %s\n", 1995 drive->name); 1996 goto failed; 1997 } 1998 } 1999 2000 drive->debug_mask = debug_mask; 2001 drive->irq_handler = cdrom_newpc_intr; 2002 2003 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL); 2004 if (info == NULL) { 2005 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n", 2006 drive->name); 2007 goto failed; 2008 } 2009 2010 g = alloc_disk(1 << PARTN_BITS); 2011 if (!g) 2012 goto out_free_cd; 2013 2014 ide_init_disk(g, drive); 2015 2016 info->dev.parent = &drive->gendev; 2017 info->dev.release = ide_cd_release; 2018 dev_set_name(&info->dev, dev_name(&drive->gendev)); 2019 2020 if (device_register(&info->dev)) 2021 goto out_free_disk; 2022 2023 info->drive = drive; 2024 info->driver = &ide_cdrom_driver; 2025 info->disk = g; 2026 2027 g->private_data = &info->driver; 2028 2029 drive->driver_data = info; 2030 2031 g->minors = 1; 2032 g->driverfs_dev = &drive->gendev; 2033 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE; 2034 if (ide_cdrom_setup(drive)) { 2035 put_device(&info->dev); 2036 goto failed; 2037 } 2038 2039 ide_cd_read_toc(drive, &sense); 2040 g->fops = &idecd_ops; 2041 g->flags |= GENHD_FL_REMOVABLE; 2042 add_disk(g); 2043 return 0; 2044 2045out_free_disk: 2046 put_disk(g); 2047out_free_cd: 2048 kfree(info); 2049failed: 2050 return -ENODEV; 2051} 2052 2053static void __exit ide_cdrom_exit(void) 2054{ 2055 driver_unregister(&ide_cdrom_driver.gen_driver); 2056} 2057 2058static int __init ide_cdrom_init(void) 2059{ 2060 printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n"); 2061 return driver_register(&ide_cdrom_driver.gen_driver); 2062} 2063 2064MODULE_ALIAS("ide:*m-cdrom*"); 2065MODULE_ALIAS("ide-cd"); 2066module_init(ide_cdrom_init); 2067module_exit(ide_cdrom_exit); 2068MODULE_LICENSE("GPL"); 2069