ide-cd.c revision 8a116974852a727bdfe6b1b897102903a17228a5
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 ide_cd_complete_failed_rq(ide_drive_t *drive, struct request *rq) 246{ 247 /* 248 * For REQ_TYPE_SENSE, "rq->buffer" points to the original 249 * failed request 250 */ 251 struct request *failed = (struct request *)rq->buffer; 252 struct cdrom_info *info = drive->driver_data; 253 void *sense = &info->sense_data; 254 255 if (failed) { 256 if (failed->sense) { 257 sense = failed->sense; 258 failed->sense_len = rq->sense_len; 259 } 260 cdrom_analyze_sense_data(drive, failed, sense); 261 262 if (ide_end_rq(drive, failed, -EIO, blk_rq_bytes(failed))) 263 BUG(); 264 } else 265 cdrom_analyze_sense_data(drive, NULL, sense); 266} 267 268static void cdrom_end_request(ide_drive_t *drive, int uptodate) 269{ 270 struct request *rq = drive->hwif->rq; 271 int nsectors = rq->hard_cur_sectors; 272 273 ide_debug_log(IDE_DBG_FUNC, "cmd: 0x%x, uptodate: 0x%x, nsectors: %d", 274 rq->cmd[0], uptodate, nsectors); 275 276 if (blk_sense_request(rq) && uptodate) 277 ide_cd_complete_failed_rq(drive, rq); 278 279 if (!rq->current_nr_sectors && blk_fs_request(rq)) 280 uptodate = 1; 281 /* make sure it's fully ended */ 282 if (blk_pc_request(rq)) 283 nsectors = (rq->data_len + 511) >> 9; 284 if (!nsectors) 285 nsectors = 1; 286 287 ide_debug_log(IDE_DBG_FUNC, "uptodate: 0x%x, nsectors: %d", 288 uptodate, nsectors); 289 290 if (blk_fs_request(rq) == 0 && uptodate <= 0 && rq->errors == 0) 291 rq->errors = -EIO; 292 293 ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9); 294} 295 296/* 297 * Returns: 298 * 0: if the request should be continued. 299 * 1: if the request will be going through error recovery. 300 * 2: if the request should be ended. 301 */ 302static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret) 303{ 304 ide_hwif_t *hwif = drive->hwif; 305 struct request *rq = hwif->rq; 306 int stat, err, sense_key; 307 308 /* check for errors */ 309 stat = hwif->tp_ops->read_status(hwif); 310 311 if (stat_ret) 312 *stat_ret = stat; 313 314 if (OK_STAT(stat, good_stat, BAD_R_STAT)) 315 return 0; 316 317 /* get the IDE error register */ 318 err = ide_read_error(drive); 319 sense_key = err >> 4; 320 321 ide_debug_log(IDE_DBG_RQ, "stat: 0x%x, good_stat: 0x%x, cmd[0]: 0x%x, " 322 "rq->cmd_type: 0x%x, err: 0x%x", 323 stat, good_stat, rq->cmd[0], rq->cmd_type, 324 err); 325 326 if (blk_sense_request(rq)) { 327 /* 328 * We got an error trying to get sense info from the drive 329 * (probably while trying to recover from a former error). 330 * Just give up. 331 */ 332 rq->cmd_flags |= REQ_FAILED; 333 return 2; 334 } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) { 335 /* All other functions, except for READ. */ 336 337 /* 338 * if we have an error, pass back CHECK_CONDITION as the 339 * scsi status byte 340 */ 341 if (blk_pc_request(rq) && !rq->errors) 342 rq->errors = SAM_STAT_CHECK_CONDITION; 343 344 /* check for tray open */ 345 if (sense_key == NOT_READY) { 346 cdrom_saw_media_change(drive); 347 } else if (sense_key == UNIT_ATTENTION) { 348 /* check for media change */ 349 cdrom_saw_media_change(drive); 350 return 0; 351 } else if (sense_key == ILLEGAL_REQUEST && 352 rq->cmd[0] == GPCMD_START_STOP_UNIT) { 353 /* 354 * Don't print error message for this condition-- 355 * SFF8090i indicates that 5/24/00 is the correct 356 * response to a request to close the tray if the 357 * drive doesn't have that capability. 358 * cdrom_log_sense() knows this! 359 */ 360 } else if (!(rq->cmd_flags & REQ_QUIET)) { 361 /* otherwise, print an error */ 362 ide_dump_status(drive, "packet command error", stat); 363 } 364 365 rq->cmd_flags |= REQ_FAILED; 366 367 /* 368 * instead of playing games with moving completions around, 369 * remove failed request completely and end it when the 370 * request sense has completed 371 */ 372 goto end_request; 373 374 } else if (blk_fs_request(rq)) { 375 int do_end_request = 0; 376 377 /* handle errors from READ and WRITE requests */ 378 379 if (blk_noretry_request(rq)) 380 do_end_request = 1; 381 382 if (sense_key == NOT_READY) { 383 /* tray open */ 384 if (rq_data_dir(rq) == READ) { 385 cdrom_saw_media_change(drive); 386 387 /* fail the request */ 388 printk(KERN_ERR PFX "%s: tray open\n", 389 drive->name); 390 do_end_request = 1; 391 } else { 392 struct cdrom_info *info = drive->driver_data; 393 394 /* 395 * Allow the drive 5 seconds to recover, some 396 * devices will return this error while flushing 397 * data from cache. 398 */ 399 if (!rq->errors) 400 info->write_timeout = jiffies + 401 ATAPI_WAIT_WRITE_BUSY; 402 rq->errors = 1; 403 if (time_after(jiffies, info->write_timeout)) 404 do_end_request = 1; 405 else { 406 struct request_queue *q = drive->queue; 407 unsigned long flags; 408 409 /* 410 * take a breather relying on the unplug 411 * timer to kick us again 412 */ 413 spin_lock_irqsave(q->queue_lock, flags); 414 blk_plug_device(q); 415 spin_unlock_irqrestore(q->queue_lock, flags); 416 417 return 1; 418 } 419 } 420 } else if (sense_key == UNIT_ATTENTION) { 421 /* media change */ 422 cdrom_saw_media_change(drive); 423 424 /* 425 * Arrange to retry the request but be sure to give up 426 * if we've retried too many times. 427 */ 428 if (++rq->errors > ERROR_MAX) 429 do_end_request = 1; 430 } else if (sense_key == ILLEGAL_REQUEST || 431 sense_key == DATA_PROTECT) { 432 /* 433 * No point in retrying after an illegal request or data 434 * protect error. 435 */ 436 ide_dump_status(drive, "command error", stat); 437 do_end_request = 1; 438 } else if (sense_key == MEDIUM_ERROR) { 439 /* 440 * No point in re-trying a zillion times on a bad 441 * sector. If we got here the error is not correctable. 442 */ 443 ide_dump_status(drive, "media error (bad sector)", 444 stat); 445 do_end_request = 1; 446 } else if (sense_key == BLANK_CHECK) { 447 /* disk appears blank ?? */ 448 ide_dump_status(drive, "media error (blank)", stat); 449 do_end_request = 1; 450 } else if ((err & ~ATA_ABORTED) != 0) { 451 /* go to the default handler for other errors */ 452 ide_error(drive, "cdrom_decode_status", stat); 453 return 1; 454 } else if ((++rq->errors > ERROR_MAX)) { 455 /* we've racked up too many retries, abort */ 456 do_end_request = 1; 457 } 458 459 /* 460 * End a request through request sense analysis when we have 461 * sense data. We need this in order to perform end of media 462 * processing. 463 */ 464 if (do_end_request) 465 goto end_request; 466 467 /* 468 * If we got a CHECK_CONDITION status, queue 469 * a request sense command. 470 */ 471 if (stat & ATA_ERR) 472 cdrom_queue_request_sense(drive, NULL, NULL); 473 return 1; 474 } else { 475 blk_dump_rq_flags(rq, PFX "bad rq"); 476 return 2; 477 } 478 479end_request: 480 if (stat & ATA_ERR) { 481 struct request_queue *q = drive->queue; 482 unsigned long flags; 483 484 spin_lock_irqsave(q->queue_lock, flags); 485 blkdev_dequeue_request(rq); 486 spin_unlock_irqrestore(q->queue_lock, flags); 487 488 hwif->rq = NULL; 489 490 cdrom_queue_request_sense(drive, rq->sense, rq); 491 return 1; 492 } else 493 return 2; 494} 495 496/* 497 * Check the contents of the interrupt reason register from the cdrom 498 * and attempt to recover if there are problems. Returns 0 if everything's 499 * ok; nonzero if the request has been terminated. 500 */ 501static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq, 502 int len, int ireason, int rw) 503{ 504 ide_hwif_t *hwif = drive->hwif; 505 506 ide_debug_log(IDE_DBG_FUNC, "ireason: 0x%x, rw: 0x%x", ireason, rw); 507 508 /* 509 * ireason == 0: the drive wants to receive data from us 510 * ireason == 2: the drive is expecting to transfer data to us 511 */ 512 if (ireason == (!rw << 1)) 513 return 0; 514 else if (ireason == (rw << 1)) { 515 516 /* whoops... */ 517 printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n", 518 drive->name, __func__); 519 520 ide_pad_transfer(drive, rw, len); 521 } else if (rw == 0 && ireason == 1) { 522 /* 523 * Some drives (ASUS) seem to tell us that status info is 524 * available. Just get it and ignore. 525 */ 526 (void)hwif->tp_ops->read_status(hwif); 527 return 0; 528 } else { 529 /* drive wants a command packet, or invalid ireason... */ 530 printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n", 531 drive->name, __func__, ireason); 532 } 533 534 if (rq->cmd_type == REQ_TYPE_ATA_PC) 535 rq->cmd_flags |= REQ_FAILED; 536 537 return -1; 538} 539 540/* 541 * Assume that the drive will always provide data in multiples of at least 542 * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise. 543 */ 544static int ide_cd_check_transfer_size(ide_drive_t *drive, int len) 545{ 546 ide_debug_log(IDE_DBG_FUNC, "len: %d", len); 547 548 if ((len % SECTOR_SIZE) == 0) 549 return 0; 550 551 printk(KERN_ERR PFX "%s: %s: Bad transfer size %d\n", drive->name, 552 __func__, len); 553 554 if (drive->atapi_flags & IDE_AFLAG_LIMIT_NFRAMES) 555 printk(KERN_ERR PFX "This drive is not supported by this " 556 "version of the driver\n"); 557 else { 558 printk(KERN_ERR PFX "Trying to limit transfer sizes\n"); 559 drive->atapi_flags |= IDE_AFLAG_LIMIT_NFRAMES; 560 } 561 562 return 1; 563} 564 565static ide_startstop_t ide_cd_prepare_rw_request(ide_drive_t *drive, 566 struct request *rq) 567{ 568 ide_debug_log(IDE_DBG_RQ, "rq->cmd_flags: 0x%x", rq->cmd_flags); 569 570 if (rq_data_dir(rq) == READ) { 571 unsigned short sectors_per_frame = 572 queue_hardsect_size(drive->queue) >> SECTOR_BITS; 573 int nskip = rq->sector & (sectors_per_frame - 1); 574 575 /* 576 * If the requested sector doesn't start on a frame boundary, 577 * we must adjust the start of the transfer so that it does, 578 * and remember to skip the first few sectors. 579 * 580 * If the rq->current_nr_sectors field is larger than the size 581 * of the buffer, it will mean that we're to skip a number of 582 * sectors equal to the amount by which rq->current_nr_sectors 583 * is larger than the buffer size. 584 */ 585 if (nskip > 0) { 586 /* sanity check... */ 587 if (rq->current_nr_sectors != 588 bio_cur_sectors(rq->bio)) { 589 printk(KERN_ERR PFX "%s: %s: buffer botch (%u)\n", 590 drive->name, __func__, 591 rq->current_nr_sectors); 592 return ide_stopped; 593 } 594 rq->current_nr_sectors += nskip; 595 } 596 } 597 598 /* set up the command */ 599 rq->timeout = ATAPI_WAIT_PC; 600 601 return ide_started; 602} 603 604/* 605 * Fix up a possibly partially-processed request so that we can start it over 606 * entirely, or even put it back on the request queue. 607 */ 608static void ide_cd_restore_request(ide_drive_t *drive, struct request *rq) 609{ 610 611 ide_debug_log(IDE_DBG_FUNC, "enter"); 612 613 if (rq->buffer != bio_data(rq->bio)) { 614 sector_t n = 615 (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE; 616 617 rq->buffer = bio_data(rq->bio); 618 rq->nr_sectors += n; 619 rq->sector -= n; 620 } 621 rq->current_nr_sectors = bio_cur_sectors(rq->bio); 622 rq->hard_cur_sectors = rq->current_nr_sectors; 623 rq->hard_nr_sectors = rq->nr_sectors; 624 rq->hard_sector = rq->sector; 625 rq->q->prep_rq_fn(rq->q, rq); 626} 627 628static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct request *rq) 629{ 630 ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]); 631 632 /* 633 * Some of the trailing request sense fields are optional, 634 * and some drives don't send them. Sigh. 635 */ 636 if (rq->cmd[0] == GPCMD_REQUEST_SENSE && 637 rq->data_len > 0 && rq->data_len <= 5) 638 while (rq->data_len > 0) { 639 *(u8 *)rq->data++ = 0; 640 --rq->data_len; 641 } 642} 643 644int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd, 645 int write, void *buffer, unsigned *bufflen, 646 struct request_sense *sense, int timeout, 647 unsigned int cmd_flags) 648{ 649 struct cdrom_info *info = drive->driver_data; 650 struct request_sense local_sense; 651 int retries = 10; 652 unsigned int flags = 0; 653 654 if (!sense) 655 sense = &local_sense; 656 657 ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, " 658 "cmd_flags: 0x%x", 659 cmd[0], write, timeout, cmd_flags); 660 661 /* start of retry loop */ 662 do { 663 struct request *rq; 664 int error; 665 666 rq = blk_get_request(drive->queue, write, __GFP_WAIT); 667 668 memcpy(rq->cmd, cmd, BLK_MAX_CDB); 669 rq->cmd_type = REQ_TYPE_ATA_PC; 670 rq->sense = sense; 671 rq->cmd_flags |= cmd_flags; 672 rq->timeout = timeout; 673 if (buffer) { 674 rq->data = buffer; 675 rq->data_len = *bufflen; 676 } 677 678 error = blk_execute_rq(drive->queue, info->disk, rq, 0); 679 680 if (buffer) 681 *bufflen = rq->data_len; 682 683 flags = rq->cmd_flags; 684 blk_put_request(rq); 685 686 /* 687 * FIXME: we should probably abort/retry or something in case of 688 * failure. 689 */ 690 if (flags & REQ_FAILED) { 691 /* 692 * The request failed. Retry if it was due to a unit 693 * attention status (usually means media was changed). 694 */ 695 struct request_sense *reqbuf = sense; 696 697 if (reqbuf->sense_key == UNIT_ATTENTION) 698 cdrom_saw_media_change(drive); 699 else if (reqbuf->sense_key == NOT_READY && 700 reqbuf->asc == 4 && reqbuf->ascq != 4) { 701 /* 702 * The drive is in the process of loading 703 * a disk. Retry, but wait a little to give 704 * the drive time to complete the load. 705 */ 706 ssleep(2); 707 } else { 708 /* otherwise, don't retry */ 709 retries = 0; 710 } 711 --retries; 712 } 713 714 /* end of retry loop */ 715 } while ((flags & REQ_FAILED) && retries >= 0); 716 717 /* return an error if the command failed */ 718 return (flags & REQ_FAILED) ? -EIO : 0; 719} 720 721/* 722 * Called from blk_end_request_callback() after the data of the request is 723 * completed and before the request itself is completed. By returning value '1', 724 * blk_end_request_callback() returns immediately without completing it. 725 */ 726static int cdrom_newpc_intr_dummy_cb(struct request *rq) 727{ 728 return 1; 729} 730 731static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive) 732{ 733 ide_hwif_t *hwif = drive->hwif; 734 struct request *rq = hwif->rq; 735 xfer_func_t *xferfunc; 736 ide_expiry_t *expiry = NULL; 737 int dma_error = 0, dma, stat, thislen, uptodate = 0; 738 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc; 739 int sense = blk_sense_request(rq); 740 unsigned int timeout; 741 u16 len; 742 u8 ireason; 743 744 ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x", 745 rq->cmd[0], write); 746 747 /* check for errors */ 748 dma = drive->dma; 749 if (dma) { 750 drive->dma = 0; 751 dma_error = hwif->dma_ops->dma_end(drive); 752 if (dma_error) { 753 printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name, 754 write ? "write" : "read"); 755 ide_dma_off(drive); 756 } 757 } 758 759 rc = cdrom_decode_status(drive, 0, &stat); 760 if (rc) { 761 if (rc == 2) 762 goto out_end; 763 return ide_stopped; 764 } 765 766 /* using dma, transfer is complete now */ 767 if (dma) { 768 if (dma_error) 769 return ide_error(drive, "dma error", stat); 770 if (blk_fs_request(rq)) { 771 ide_complete_rq(drive, 0, rq->nr_sectors 772 ? (rq->nr_sectors << 9) : ide_rq_bytes(rq)); 773 return ide_stopped; 774 } else if (rq->cmd_type == REQ_TYPE_ATA_PC && !rq->bio) { 775 ide_complete_rq(drive, 0, 512); 776 return ide_stopped; 777 } 778 if (blk_pc_request(rq) == 0 && uptodate == 0) 779 rq->cmd_flags |= REQ_FAILED; 780 goto out_end; 781 } 782 783 ide_read_bcount_and_ireason(drive, &len, &ireason); 784 785 thislen = blk_fs_request(rq) ? len : rq->data_len; 786 if (thislen > len) 787 thislen = len; 788 789 ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d", 790 stat, thislen); 791 792 /* If DRQ is clear, the command has completed. */ 793 if ((stat & ATA_DRQ) == 0) { 794 if (blk_fs_request(rq)) { 795 /* 796 * If we're not done reading/writing, complain. 797 * Otherwise, complete the command normally. 798 */ 799 uptodate = 1; 800 if (rq->current_nr_sectors > 0) { 801 printk(KERN_ERR PFX "%s: %s: data underrun " 802 "(%d blocks)\n", 803 drive->name, __func__, 804 rq->current_nr_sectors); 805 if (!write) 806 rq->cmd_flags |= REQ_FAILED; 807 uptodate = 0; 808 } 809 } else if (!blk_pc_request(rq)) { 810 ide_cd_request_sense_fixup(drive, rq); 811 /* complain if we still have data left to transfer */ 812 uptodate = rq->data_len ? 0 : 1; 813 if (uptodate == 0) 814 rq->cmd_flags |= REQ_FAILED; 815 } 816 goto out_end; 817 } 818 819 /* check which way to transfer data */ 820 rc = ide_cd_check_ireason(drive, rq, len, ireason, write); 821 if (rc) 822 goto out_end; 823 824 if (blk_fs_request(rq)) { 825 if (write == 0) { 826 int nskip; 827 828 if (ide_cd_check_transfer_size(drive, len)) 829 goto out_end; 830 831 /* 832 * First, figure out if we need to bit-bucket 833 * any of the leading sectors. 834 */ 835 nskip = min_t(int, rq->current_nr_sectors 836 - bio_cur_sectors(rq->bio), 837 thislen >> 9); 838 if (nskip > 0) { 839 ide_pad_transfer(drive, write, nskip << 9); 840 rq->current_nr_sectors -= nskip; 841 thislen -= (nskip << 9); 842 } 843 } 844 } 845 846 if (ireason == 0) { 847 write = 1; 848 xferfunc = hwif->tp_ops->output_data; 849 } else { 850 write = 0; 851 xferfunc = hwif->tp_ops->input_data; 852 } 853 854 ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, " 855 "ireason: 0x%x", 856 rq->cmd_type, ireason); 857 858 /* transfer data */ 859 while (thislen > 0) { 860 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data; 861 int blen = rq->data_len; 862 863 /* bio backed? */ 864 if (rq->bio) { 865 if (blk_fs_request(rq)) { 866 ptr = rq->buffer; 867 blen = rq->current_nr_sectors << 9; 868 } else { 869 ptr = bio_data(rq->bio); 870 blen = bio_iovec(rq->bio)->bv_len; 871 } 872 } 873 874 if (!ptr) { 875 if (blk_fs_request(rq) && !write) 876 /* 877 * If the buffers are full, pipe the rest into 878 * oblivion. 879 */ 880 ide_pad_transfer(drive, 0, thislen); 881 else { 882 printk(KERN_ERR PFX "%s: confused, missing data\n", 883 drive->name); 884 blk_dump_rq_flags(rq, rq_data_dir(rq) 885 ? "cdrom_newpc_intr, write" 886 : "cdrom_newpc_intr, read"); 887 } 888 break; 889 } 890 891 if (blen > thislen) 892 blen = thislen; 893 894 xferfunc(drive, NULL, ptr, blen); 895 896 thislen -= blen; 897 len -= blen; 898 899 if (blk_fs_request(rq)) { 900 rq->buffer += blen; 901 rq->nr_sectors -= (blen >> 9); 902 rq->current_nr_sectors -= (blen >> 9); 903 rq->sector += (blen >> 9); 904 905 if (rq->current_nr_sectors == 0 && rq->nr_sectors) 906 cdrom_end_request(drive, 1); 907 } else { 908 rq->data_len -= blen; 909 910 /* 911 * The request can't be completed until DRQ is cleared. 912 * So complete the data, but don't complete the request 913 * using the dummy function for the callback feature 914 * of blk_end_request_callback(). 915 */ 916 if (rq->bio) 917 blk_end_request_callback(rq, 0, blen, 918 cdrom_newpc_intr_dummy_cb); 919 else 920 rq->data += blen; 921 } 922 if (sense && write == 0) 923 rq->sense_len += blen; 924 } 925 926 /* pad, if necessary */ 927 if (!blk_fs_request(rq) && len > 0) 928 ide_pad_transfer(drive, write, len); 929 930 if (blk_pc_request(rq)) { 931 timeout = rq->timeout; 932 } else { 933 timeout = ATAPI_WAIT_PC; 934 if (!blk_fs_request(rq)) 935 expiry = ide_cd_expiry; 936 } 937 938 hwif->expiry = expiry; 939 ide_set_handler(drive, cdrom_newpc_intr, timeout); 940 return ide_started; 941 942out_end: 943 if (blk_pc_request(rq) && rc == 0) { 944 unsigned int dlen = rq->data_len; 945 946 if (dma) 947 rq->data_len = 0; 948 949 if (blk_end_request(rq, 0, dlen)) 950 BUG(); 951 952 hwif->rq = NULL; 953 } else { 954 cdrom_end_request(drive, uptodate); 955 if (sense && rc == 2) 956 ide_error(drive, "request sense failure", stat); 957 } 958 return ide_stopped; 959} 960 961static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq) 962{ 963 struct cdrom_info *cd = drive->driver_data; 964 int write = rq_data_dir(rq) == WRITE; 965 unsigned short sectors_per_frame = 966 queue_hardsect_size(drive->queue) >> SECTOR_BITS; 967 968 ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, write: 0x%x, " 969 "secs_per_frame: %u", 970 rq->cmd[0], write, sectors_per_frame); 971 972 if (write) { 973 /* disk has become write protected */ 974 if (get_disk_ro(cd->disk)) 975 return ide_stopped; 976 } else { 977 /* 978 * We may be retrying this request after an error. Fix up any 979 * weirdness which might be present in the request packet. 980 */ 981 ide_cd_restore_request(drive, rq); 982 } 983 984 /* use DMA, if possible / writes *must* be hardware frame aligned */ 985 if ((rq->nr_sectors & (sectors_per_frame - 1)) || 986 (rq->sector & (sectors_per_frame - 1))) { 987 if (write) 988 return ide_stopped; 989 drive->dma = 0; 990 } else 991 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA); 992 993 if (write) 994 cd->devinfo.media_written = 1; 995 996 return ide_started; 997} 998 999static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq) 1000{ 1001 1002 ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x", 1003 rq->cmd[0], rq->cmd_type); 1004 1005 if (blk_pc_request(rq)) 1006 rq->cmd_flags |= REQ_QUIET; 1007 else 1008 rq->cmd_flags &= ~REQ_FAILED; 1009 1010 drive->dma = 0; 1011 1012 /* sg request */ 1013 if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) { 1014 struct request_queue *q = drive->queue; 1015 unsigned int alignment; 1016 char *buf; 1017 1018 if (rq->bio) 1019 buf = bio_data(rq->bio); 1020 else 1021 buf = rq->data; 1022 1023 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA); 1024 1025 /* 1026 * check if dma is safe 1027 * 1028 * NOTE! The "len" and "addr" checks should possibly have 1029 * separate masks. 1030 */ 1031 alignment = queue_dma_alignment(q) | q->dma_pad_mask; 1032 if ((unsigned long)buf & alignment 1033 || rq->data_len & q->dma_pad_mask 1034 || object_is_on_stack(buf)) 1035 drive->dma = 0; 1036 } 1037} 1038 1039static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq, 1040 sector_t block) 1041{ 1042 struct ide_cmd cmd; 1043 int uptodate = 0; 1044 1045 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu", 1046 rq->cmd[0], (unsigned long long)block); 1047 1048 if (drive->debug_mask & IDE_DBG_RQ) 1049 blk_dump_rq_flags(rq, "ide_cd_do_request"); 1050 1051 if (blk_fs_request(rq)) { 1052 if (cdrom_start_rw(drive, rq) == ide_stopped || 1053 ide_cd_prepare_rw_request(drive, rq) == ide_stopped) 1054 goto out_end; 1055 } else if (blk_sense_request(rq) || blk_pc_request(rq) || 1056 rq->cmd_type == REQ_TYPE_ATA_PC) { 1057 if (!rq->timeout) 1058 rq->timeout = ATAPI_WAIT_PC; 1059 1060 cdrom_do_block_pc(drive, rq); 1061 } else if (blk_special_request(rq)) { 1062 /* right now this can only be a reset... */ 1063 uptodate = 1; 1064 goto out_end; 1065 } else { 1066 blk_dump_rq_flags(rq, DRV_NAME " bad flags"); 1067 goto out_end; 1068 } 1069 1070 memset(&cmd, 0, sizeof(cmd)); 1071 1072 if (rq_data_dir(rq)) 1073 cmd.tf_flags |= IDE_TFLAG_WRITE; 1074 1075 cmd.rq = rq; 1076 1077 return ide_issue_pc(drive, &cmd); 1078out_end: 1079 cdrom_end_request(drive, uptodate); 1080 return ide_stopped; 1081} 1082 1083/* 1084 * Ioctl handling. 1085 * 1086 * Routines which queue packet commands take as a final argument a pointer to a 1087 * request_sense struct. If execution of the command results in an error with a 1088 * CHECK CONDITION status, this structure will be filled with the results of the 1089 * subsequent request sense command. The pointer can also be NULL, in which case 1090 * no sense information is returned. 1091 */ 1092static void msf_from_bcd(struct atapi_msf *msf) 1093{ 1094 msf->minute = bcd2bin(msf->minute); 1095 msf->second = bcd2bin(msf->second); 1096 msf->frame = bcd2bin(msf->frame); 1097} 1098 1099int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense) 1100{ 1101 struct cdrom_info *info = drive->driver_data; 1102 struct cdrom_device_info *cdi = &info->devinfo; 1103 unsigned char cmd[BLK_MAX_CDB]; 1104 1105 ide_debug_log(IDE_DBG_FUNC, "enter"); 1106 1107 memset(cmd, 0, BLK_MAX_CDB); 1108 cmd[0] = GPCMD_TEST_UNIT_READY; 1109 1110 /* 1111 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs 1112 * instead of supporting the LOAD_UNLOAD opcode. 1113 */ 1114 cmd[7] = cdi->sanyo_slot % 3; 1115 1116 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET); 1117} 1118 1119static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity, 1120 unsigned long *sectors_per_frame, 1121 struct request_sense *sense) 1122{ 1123 struct { 1124 __be32 lba; 1125 __be32 blocklen; 1126 } capbuf; 1127 1128 int stat; 1129 unsigned char cmd[BLK_MAX_CDB]; 1130 unsigned len = sizeof(capbuf); 1131 u32 blocklen; 1132 1133 ide_debug_log(IDE_DBG_FUNC, "enter"); 1134 1135 memset(cmd, 0, BLK_MAX_CDB); 1136 cmd[0] = GPCMD_READ_CDVD_CAPACITY; 1137 1138 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0, 1139 REQ_QUIET); 1140 if (stat) 1141 return stat; 1142 1143 /* 1144 * Sanity check the given block size 1145 */ 1146 blocklen = be32_to_cpu(capbuf.blocklen); 1147 switch (blocklen) { 1148 case 512: 1149 case 1024: 1150 case 2048: 1151 case 4096: 1152 break; 1153 default: 1154 printk(KERN_ERR PFX "%s: weird block size %u\n", 1155 drive->name, blocklen); 1156 printk(KERN_ERR PFX "%s: default to 2kb block size\n", 1157 drive->name); 1158 blocklen = 2048; 1159 break; 1160 } 1161 1162 *capacity = 1 + be32_to_cpu(capbuf.lba); 1163 *sectors_per_frame = blocklen >> SECTOR_BITS; 1164 1165 ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu", 1166 *capacity, *sectors_per_frame); 1167 1168 return 0; 1169} 1170 1171static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag, 1172 int format, char *buf, int buflen, 1173 struct request_sense *sense) 1174{ 1175 unsigned char cmd[BLK_MAX_CDB]; 1176 1177 ide_debug_log(IDE_DBG_FUNC, "enter"); 1178 1179 memset(cmd, 0, BLK_MAX_CDB); 1180 1181 cmd[0] = GPCMD_READ_TOC_PMA_ATIP; 1182 cmd[6] = trackno; 1183 cmd[7] = (buflen >> 8); 1184 cmd[8] = (buflen & 0xff); 1185 cmd[9] = (format << 6); 1186 1187 if (msf_flag) 1188 cmd[1] = 2; 1189 1190 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET); 1191} 1192 1193/* Try to read the entire TOC for the disk into our internal buffer. */ 1194int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense) 1195{ 1196 int stat, ntracks, i; 1197 struct cdrom_info *info = drive->driver_data; 1198 struct cdrom_device_info *cdi = &info->devinfo; 1199 struct atapi_toc *toc = info->toc; 1200 struct { 1201 struct atapi_toc_header hdr; 1202 struct atapi_toc_entry ent; 1203 } ms_tmp; 1204 long last_written; 1205 unsigned long sectors_per_frame = SECTORS_PER_FRAME; 1206 1207 ide_debug_log(IDE_DBG_FUNC, "enter"); 1208 1209 if (toc == NULL) { 1210 /* try to allocate space */ 1211 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL); 1212 if (toc == NULL) { 1213 printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n", 1214 drive->name); 1215 return -ENOMEM; 1216 } 1217 info->toc = toc; 1218 } 1219 1220 /* 1221 * Check to see if the existing data is still valid. If it is, 1222 * just return. 1223 */ 1224 (void) cdrom_check_status(drive, sense); 1225 1226 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID) 1227 return 0; 1228 1229 /* try to get the total cdrom capacity and sector size */ 1230 stat = cdrom_read_capacity(drive, &toc->capacity, §ors_per_frame, 1231 sense); 1232 if (stat) 1233 toc->capacity = 0x1fffff; 1234 1235 set_capacity(info->disk, toc->capacity * sectors_per_frame); 1236 /* save a private copy of the TOC capacity for error handling */ 1237 drive->probed_capacity = toc->capacity * sectors_per_frame; 1238 1239 blk_queue_hardsect_size(drive->queue, 1240 sectors_per_frame << SECTOR_BITS); 1241 1242 /* first read just the header, so we know how long the TOC is */ 1243 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr, 1244 sizeof(struct atapi_toc_header), sense); 1245 if (stat) 1246 return stat; 1247 1248 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1249 toc->hdr.first_track = bcd2bin(toc->hdr.first_track); 1250 toc->hdr.last_track = bcd2bin(toc->hdr.last_track); 1251 } 1252 1253 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1; 1254 if (ntracks <= 0) 1255 return -EIO; 1256 if (ntracks > MAX_TRACKS) 1257 ntracks = MAX_TRACKS; 1258 1259 /* now read the whole schmeer */ 1260 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0, 1261 (char *)&toc->hdr, 1262 sizeof(struct atapi_toc_header) + 1263 (ntracks + 1) * 1264 sizeof(struct atapi_toc_entry), sense); 1265 1266 if (stat && toc->hdr.first_track > 1) { 1267 /* 1268 * Cds with CDI tracks only don't have any TOC entries, despite 1269 * of this the returned values are 1270 * first_track == last_track = number of CDI tracks + 1, 1271 * so that this case is indistinguishable from the same layout 1272 * plus an additional audio track. If we get an error for the 1273 * regular case, we assume a CDI without additional audio 1274 * tracks. In this case the readable TOC is empty (CDI tracks 1275 * are not included) and only holds the Leadout entry. 1276 * 1277 * Heiko Eißfeldt. 1278 */ 1279 ntracks = 0; 1280 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0, 1281 (char *)&toc->hdr, 1282 sizeof(struct atapi_toc_header) + 1283 (ntracks + 1) * 1284 sizeof(struct atapi_toc_entry), 1285 sense); 1286 if (stat) 1287 return stat; 1288 1289 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1290 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT); 1291 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT); 1292 } else { 1293 toc->hdr.first_track = CDROM_LEADOUT; 1294 toc->hdr.last_track = CDROM_LEADOUT; 1295 } 1296 } 1297 1298 if (stat) 1299 return stat; 1300 1301 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length); 1302 1303 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1304 toc->hdr.first_track = bcd2bin(toc->hdr.first_track); 1305 toc->hdr.last_track = bcd2bin(toc->hdr.last_track); 1306 } 1307 1308 for (i = 0; i <= ntracks; i++) { 1309 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) { 1310 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) 1311 toc->ent[i].track = bcd2bin(toc->ent[i].track); 1312 msf_from_bcd(&toc->ent[i].addr.msf); 1313 } 1314 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute, 1315 toc->ent[i].addr.msf.second, 1316 toc->ent[i].addr.msf.frame); 1317 } 1318 1319 if (toc->hdr.first_track != CDROM_LEADOUT) { 1320 /* read the multisession information */ 1321 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp, 1322 sizeof(ms_tmp), sense); 1323 if (stat) 1324 return stat; 1325 1326 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba); 1327 } else { 1328 ms_tmp.hdr.last_track = CDROM_LEADOUT; 1329 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track; 1330 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */ 1331 } 1332 1333 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) { 1334 /* re-read multisession information using MSF format */ 1335 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp, 1336 sizeof(ms_tmp), sense); 1337 if (stat) 1338 return stat; 1339 1340 msf_from_bcd(&ms_tmp.ent.addr.msf); 1341 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute, 1342 ms_tmp.ent.addr.msf.second, 1343 ms_tmp.ent.addr.msf.frame); 1344 } 1345 1346 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track); 1347 1348 /* now try to get the total cdrom capacity */ 1349 stat = cdrom_get_last_written(cdi, &last_written); 1350 if (!stat && (last_written > toc->capacity)) { 1351 toc->capacity = last_written; 1352 set_capacity(info->disk, toc->capacity * sectors_per_frame); 1353 drive->probed_capacity = toc->capacity * sectors_per_frame; 1354 } 1355 1356 /* Remember that we've read this stuff. */ 1357 drive->atapi_flags |= IDE_AFLAG_TOC_VALID; 1358 1359 return 0; 1360} 1361 1362int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf) 1363{ 1364 struct cdrom_info *info = drive->driver_data; 1365 struct cdrom_device_info *cdi = &info->devinfo; 1366 struct packet_command cgc; 1367 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE; 1368 1369 ide_debug_log(IDE_DBG_FUNC, "enter"); 1370 1371 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0) 1372 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE; 1373 1374 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN); 1375 do { 1376 /* we seem to get stat=0x01,err=0x00 the first time (??) */ 1377 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0); 1378 if (!stat) 1379 break; 1380 } while (--attempts); 1381 return stat; 1382} 1383 1384void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf) 1385{ 1386 struct cdrom_info *cd = drive->driver_data; 1387 u16 curspeed, maxspeed; 1388 1389 ide_debug_log(IDE_DBG_FUNC, "enter"); 1390 1391 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) { 1392 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]); 1393 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]); 1394 } else { 1395 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]); 1396 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]); 1397 } 1398 1399 ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u", 1400 curspeed, maxspeed); 1401 1402 cd->current_speed = (curspeed + (176/2)) / 176; 1403 cd->max_speed = (maxspeed + (176/2)) / 176; 1404} 1405 1406#define IDE_CD_CAPABILITIES \ 1407 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \ 1408 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \ 1409 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \ 1410 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \ 1411 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM) 1412 1413static struct cdrom_device_ops ide_cdrom_dops = { 1414 .open = ide_cdrom_open_real, 1415 .release = ide_cdrom_release_real, 1416 .drive_status = ide_cdrom_drive_status, 1417 .media_changed = ide_cdrom_check_media_change_real, 1418 .tray_move = ide_cdrom_tray_move, 1419 .lock_door = ide_cdrom_lock_door, 1420 .select_speed = ide_cdrom_select_speed, 1421 .get_last_session = ide_cdrom_get_last_session, 1422 .get_mcn = ide_cdrom_get_mcn, 1423 .reset = ide_cdrom_reset, 1424 .audio_ioctl = ide_cdrom_audio_ioctl, 1425 .capability = IDE_CD_CAPABILITIES, 1426 .generic_packet = ide_cdrom_packet, 1427}; 1428 1429static int ide_cdrom_register(ide_drive_t *drive, int nslots) 1430{ 1431 struct cdrom_info *info = drive->driver_data; 1432 struct cdrom_device_info *devinfo = &info->devinfo; 1433 1434 ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots); 1435 1436 devinfo->ops = &ide_cdrom_dops; 1437 devinfo->speed = info->current_speed; 1438 devinfo->capacity = nslots; 1439 devinfo->handle = drive; 1440 strcpy(devinfo->name, drive->name); 1441 1442 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT) 1443 devinfo->mask |= CDC_SELECT_SPEED; 1444 1445 devinfo->disk = info->disk; 1446 return register_cdrom(devinfo); 1447} 1448 1449static int ide_cdrom_probe_capabilities(ide_drive_t *drive) 1450{ 1451 struct cdrom_info *cd = drive->driver_data; 1452 struct cdrom_device_info *cdi = &cd->devinfo; 1453 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE]; 1454 mechtype_t mechtype; 1455 int nslots = 1; 1456 1457 ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx", 1458 drive->media, drive->atapi_flags); 1459 1460 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R | 1461 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO | 1462 CDC_MO_DRIVE | CDC_RAM); 1463 1464 if (drive->media == ide_optical) { 1465 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM); 1466 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n", 1467 drive->name); 1468 return nslots; 1469 } 1470 1471 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) { 1472 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT; 1473 cdi->mask &= ~CDC_PLAY_AUDIO; 1474 return nslots; 1475 } 1476 1477 /* 1478 * We have to cheat a little here. the packet will eventually be queued 1479 * with ide_cdrom_packet(), which extracts the drive from cdi->handle. 1480 * Since this device hasn't been registered with the Uniform layer yet, 1481 * it can't do this. Same goes for cdi->ops. 1482 */ 1483 cdi->handle = drive; 1484 cdi->ops = &ide_cdrom_dops; 1485 1486 if (ide_cdrom_get_capabilities(drive, buf)) 1487 return 0; 1488 1489 if ((buf[8 + 6] & 0x01) == 0) 1490 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING; 1491 if (buf[8 + 6] & 0x08) 1492 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT; 1493 if (buf[8 + 3] & 0x01) 1494 cdi->mask &= ~CDC_CD_R; 1495 if (buf[8 + 3] & 0x02) 1496 cdi->mask &= ~(CDC_CD_RW | CDC_RAM); 1497 if (buf[8 + 2] & 0x38) 1498 cdi->mask &= ~CDC_DVD; 1499 if (buf[8 + 3] & 0x20) 1500 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM); 1501 if (buf[8 + 3] & 0x10) 1502 cdi->mask &= ~CDC_DVD_R; 1503 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK)) 1504 cdi->mask &= ~CDC_PLAY_AUDIO; 1505 1506 mechtype = buf[8 + 6] >> 5; 1507 if (mechtype == mechtype_caddy || 1508 mechtype == mechtype_popup || 1509 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE)) 1510 cdi->mask |= CDC_CLOSE_TRAY; 1511 1512 if (cdi->sanyo_slot > 0) { 1513 cdi->mask &= ~CDC_SELECT_DISC; 1514 nslots = 3; 1515 } else if (mechtype == mechtype_individual_changer || 1516 mechtype == mechtype_cartridge_changer) { 1517 nslots = cdrom_number_of_slots(cdi); 1518 if (nslots > 1) 1519 cdi->mask &= ~CDC_SELECT_DISC; 1520 } 1521 1522 ide_cdrom_update_speed(drive, buf); 1523 1524 printk(KERN_INFO PFX "%s: ATAPI", drive->name); 1525 1526 /* don't print speed if the drive reported 0 */ 1527 if (cd->max_speed) 1528 printk(KERN_CONT " %dX", cd->max_speed); 1529 1530 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM"); 1531 1532 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0) 1533 printk(KERN_CONT " DVD%s%s", 1534 (cdi->mask & CDC_DVD_R) ? "" : "-R", 1535 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM"); 1536 1537 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0) 1538 printk(KERN_CONT " CD%s%s", 1539 (cdi->mask & CDC_CD_R) ? "" : "-R", 1540 (cdi->mask & CDC_CD_RW) ? "" : "/RW"); 1541 1542 if ((cdi->mask & CDC_SELECT_DISC) == 0) 1543 printk(KERN_CONT " changer w/%d slots", nslots); 1544 else 1545 printk(KERN_CONT " drive"); 1546 1547 printk(KERN_CONT ", %dkB Cache\n", 1548 be16_to_cpup((__be16 *)&buf[8 + 12])); 1549 1550 return nslots; 1551} 1552 1553/* standard prep_rq_fn that builds 10 byte cmds */ 1554static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq) 1555{ 1556 int hard_sect = queue_hardsect_size(q); 1557 long block = (long)rq->hard_sector / (hard_sect >> 9); 1558 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9); 1559 1560 memset(rq->cmd, 0, BLK_MAX_CDB); 1561 1562 if (rq_data_dir(rq) == READ) 1563 rq->cmd[0] = GPCMD_READ_10; 1564 else 1565 rq->cmd[0] = GPCMD_WRITE_10; 1566 1567 /* 1568 * fill in lba 1569 */ 1570 rq->cmd[2] = (block >> 24) & 0xff; 1571 rq->cmd[3] = (block >> 16) & 0xff; 1572 rq->cmd[4] = (block >> 8) & 0xff; 1573 rq->cmd[5] = block & 0xff; 1574 1575 /* 1576 * and transfer length 1577 */ 1578 rq->cmd[7] = (blocks >> 8) & 0xff; 1579 rq->cmd[8] = blocks & 0xff; 1580 rq->cmd_len = 10; 1581 return BLKPREP_OK; 1582} 1583 1584/* 1585 * Most of the SCSI commands are supported directly by ATAPI devices. 1586 * This transform handles the few exceptions. 1587 */ 1588static int ide_cdrom_prep_pc(struct request *rq) 1589{ 1590 u8 *c = rq->cmd; 1591 1592 /* transform 6-byte read/write commands to the 10-byte version */ 1593 if (c[0] == READ_6 || c[0] == WRITE_6) { 1594 c[8] = c[4]; 1595 c[5] = c[3]; 1596 c[4] = c[2]; 1597 c[3] = c[1] & 0x1f; 1598 c[2] = 0; 1599 c[1] &= 0xe0; 1600 c[0] += (READ_10 - READ_6); 1601 rq->cmd_len = 10; 1602 return BLKPREP_OK; 1603 } 1604 1605 /* 1606 * it's silly to pretend we understand 6-byte sense commands, just 1607 * reject with ILLEGAL_REQUEST and the caller should take the 1608 * appropriate action 1609 */ 1610 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) { 1611 rq->errors = ILLEGAL_REQUEST; 1612 return BLKPREP_KILL; 1613 } 1614 1615 return BLKPREP_OK; 1616} 1617 1618static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq) 1619{ 1620 if (blk_fs_request(rq)) 1621 return ide_cdrom_prep_fs(q, rq); 1622 else if (blk_pc_request(rq)) 1623 return ide_cdrom_prep_pc(rq); 1624 1625 return 0; 1626} 1627 1628struct cd_list_entry { 1629 const char *id_model; 1630 const char *id_firmware; 1631 unsigned int cd_flags; 1632}; 1633 1634#ifdef CONFIG_IDE_PROC_FS 1635static sector_t ide_cdrom_capacity(ide_drive_t *drive) 1636{ 1637 unsigned long capacity, sectors_per_frame; 1638 1639 if (cdrom_read_capacity(drive, &capacity, §ors_per_frame, NULL)) 1640 return 0; 1641 1642 return capacity * sectors_per_frame; 1643} 1644 1645static int proc_idecd_read_capacity(char *page, char **start, off_t off, 1646 int count, int *eof, void *data) 1647{ 1648 ide_drive_t *drive = data; 1649 int len; 1650 1651 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive)); 1652 PROC_IDE_READ_RETURN(page, start, off, count, eof, len); 1653} 1654 1655static ide_proc_entry_t idecd_proc[] = { 1656 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL }, 1657 { NULL, 0, NULL, NULL } 1658}; 1659 1660static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive) 1661{ 1662 return idecd_proc; 1663} 1664 1665static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive) 1666{ 1667 return NULL; 1668} 1669#endif 1670 1671static const struct cd_list_entry ide_cd_quirks_list[] = { 1672 /* Limit transfer size per interrupt. */ 1673 { "SAMSUNG CD-ROM SCR-2430", NULL, IDE_AFLAG_LIMIT_NFRAMES }, 1674 { "SAMSUNG CD-ROM SCR-2432", NULL, IDE_AFLAG_LIMIT_NFRAMES }, 1675 /* SCR-3231 doesn't support the SET_CD_SPEED command. */ 1676 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT }, 1677 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */ 1678 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD | 1679 IDE_AFLAG_PRE_ATAPI12, }, 1680 /* Vertos 300, some versions of this drive like to talk BCD. */ 1681 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, }, 1682 /* Vertos 600 ESD. */ 1683 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, }, 1684 /* 1685 * Sanyo 3 CD changer uses a non-standard command for CD changing 1686 * (by default standard ATAPI support for CD changers is used). 1687 */ 1688 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD }, 1689 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD }, 1690 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD }, 1691 /* Stingray 8X CD-ROM. */ 1692 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 }, 1693 /* 1694 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length 1695 * mode sense page capabilities size, but older drives break. 1696 */ 1697 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE }, 1698 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE }, 1699 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */ 1700 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS }, 1701 /* 1702 * Some drives used by Apple don't advertise audio play 1703 * but they do support reading TOC & audio datas. 1704 */ 1705 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1706 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1707 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1708 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1709 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1710 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1711 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE }, 1712 { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE }, 1713 { NULL, NULL, 0 } 1714}; 1715 1716static unsigned int ide_cd_flags(u16 *id) 1717{ 1718 const struct cd_list_entry *cle = ide_cd_quirks_list; 1719 1720 while (cle->id_model) { 1721 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 && 1722 (cle->id_firmware == NULL || 1723 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware))) 1724 return cle->cd_flags; 1725 cle++; 1726 } 1727 1728 return 0; 1729} 1730 1731static int ide_cdrom_setup(ide_drive_t *drive) 1732{ 1733 struct cdrom_info *cd = drive->driver_data; 1734 struct cdrom_device_info *cdi = &cd->devinfo; 1735 u16 *id = drive->id; 1736 char *fw_rev = (char *)&id[ATA_ID_FW_REV]; 1737 int nslots; 1738 1739 ide_debug_log(IDE_DBG_PROBE, "enter"); 1740 1741 blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn); 1742 blk_queue_dma_alignment(drive->queue, 31); 1743 blk_queue_update_dma_pad(drive->queue, 15); 1744 drive->queue->unplug_delay = (1 * HZ) / 1000; 1745 if (!drive->queue->unplug_delay) 1746 drive->queue->unplug_delay = 1; 1747 1748 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED; 1749 drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id); 1750 1751 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) && 1752 fw_rev[4] == '1' && fw_rev[6] <= '2') 1753 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD | 1754 IDE_AFLAG_TOCADDR_AS_BCD); 1755 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) && 1756 fw_rev[4] == '1' && fw_rev[6] <= '2') 1757 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD; 1758 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD) 1759 /* 3 => use CD in slot 0 */ 1760 cdi->sanyo_slot = 3; 1761 1762 nslots = ide_cdrom_probe_capabilities(drive); 1763 1764 /* set correct block size */ 1765 blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE); 1766 1767 if (ide_cdrom_register(drive, nslots)) { 1768 printk(KERN_ERR PFX "%s: %s failed to register device with the" 1769 " cdrom driver.\n", drive->name, __func__); 1770 cd->devinfo.handle = NULL; 1771 return 1; 1772 } 1773 1774 ide_proc_register_driver(drive, cd->driver); 1775 return 0; 1776} 1777 1778static void ide_cd_remove(ide_drive_t *drive) 1779{ 1780 struct cdrom_info *info = drive->driver_data; 1781 1782 ide_debug_log(IDE_DBG_FUNC, "enter"); 1783 1784 ide_proc_unregister_driver(drive, info->driver); 1785 device_del(&info->dev); 1786 del_gendisk(info->disk); 1787 1788 mutex_lock(&idecd_ref_mutex); 1789 put_device(&info->dev); 1790 mutex_unlock(&idecd_ref_mutex); 1791} 1792 1793static void ide_cd_release(struct device *dev) 1794{ 1795 struct cdrom_info *info = to_ide_drv(dev, cdrom_info); 1796 struct cdrom_device_info *devinfo = &info->devinfo; 1797 ide_drive_t *drive = info->drive; 1798 struct gendisk *g = info->disk; 1799 1800 ide_debug_log(IDE_DBG_FUNC, "enter"); 1801 1802 kfree(info->toc); 1803 if (devinfo->handle == drive) 1804 unregister_cdrom(devinfo); 1805 drive->driver_data = NULL; 1806 blk_queue_prep_rq(drive->queue, NULL); 1807 g->private_data = NULL; 1808 put_disk(g); 1809 kfree(info); 1810} 1811 1812static int ide_cd_probe(ide_drive_t *); 1813 1814static struct ide_driver ide_cdrom_driver = { 1815 .gen_driver = { 1816 .owner = THIS_MODULE, 1817 .name = "ide-cdrom", 1818 .bus = &ide_bus_type, 1819 }, 1820 .probe = ide_cd_probe, 1821 .remove = ide_cd_remove, 1822 .version = IDECD_VERSION, 1823 .do_request = ide_cd_do_request, 1824#ifdef CONFIG_IDE_PROC_FS 1825 .proc_entries = ide_cd_proc_entries, 1826 .proc_devsets = ide_cd_proc_devsets, 1827#endif 1828}; 1829 1830static int idecd_open(struct block_device *bdev, fmode_t mode) 1831{ 1832 struct cdrom_info *info = ide_cd_get(bdev->bd_disk); 1833 int rc = -ENOMEM; 1834 1835 if (!info) 1836 return -ENXIO; 1837 1838 rc = cdrom_open(&info->devinfo, bdev, mode); 1839 1840 if (rc < 0) 1841 ide_cd_put(info); 1842 1843 return rc; 1844} 1845 1846static int idecd_release(struct gendisk *disk, fmode_t mode) 1847{ 1848 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 1849 1850 cdrom_release(&info->devinfo, mode); 1851 1852 ide_cd_put(info); 1853 1854 return 0; 1855} 1856 1857static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg) 1858{ 1859 struct packet_command cgc; 1860 char buffer[16]; 1861 int stat; 1862 char spindown; 1863 1864 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char))) 1865 return -EFAULT; 1866 1867 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN); 1868 1869 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0); 1870 if (stat) 1871 return stat; 1872 1873 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f); 1874 return cdrom_mode_select(cdi, &cgc); 1875} 1876 1877static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg) 1878{ 1879 struct packet_command cgc; 1880 char buffer[16]; 1881 int stat; 1882 char spindown; 1883 1884 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN); 1885 1886 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0); 1887 if (stat) 1888 return stat; 1889 1890 spindown = buffer[11] & 0x0f; 1891 if (copy_to_user((void __user *)arg, &spindown, sizeof(char))) 1892 return -EFAULT; 1893 return 0; 1894} 1895 1896static int idecd_ioctl(struct block_device *bdev, fmode_t mode, 1897 unsigned int cmd, unsigned long arg) 1898{ 1899 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info); 1900 int err; 1901 1902 switch (cmd) { 1903 case CDROMSETSPINDOWN: 1904 return idecd_set_spindown(&info->devinfo, arg); 1905 case CDROMGETSPINDOWN: 1906 return idecd_get_spindown(&info->devinfo, arg); 1907 default: 1908 break; 1909 } 1910 1911 err = generic_ide_ioctl(info->drive, bdev, cmd, arg); 1912 if (err == -EINVAL) 1913 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg); 1914 1915 return err; 1916} 1917 1918static int idecd_media_changed(struct gendisk *disk) 1919{ 1920 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 1921 return cdrom_media_changed(&info->devinfo); 1922} 1923 1924static int idecd_revalidate_disk(struct gendisk *disk) 1925{ 1926 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 1927 struct request_sense sense; 1928 1929 ide_cd_read_toc(info->drive, &sense); 1930 1931 return 0; 1932} 1933 1934static struct block_device_operations idecd_ops = { 1935 .owner = THIS_MODULE, 1936 .open = idecd_open, 1937 .release = idecd_release, 1938 .locked_ioctl = idecd_ioctl, 1939 .media_changed = idecd_media_changed, 1940 .revalidate_disk = idecd_revalidate_disk 1941}; 1942 1943/* module options */ 1944static unsigned long debug_mask; 1945module_param(debug_mask, ulong, 0644); 1946 1947MODULE_DESCRIPTION("ATAPI CD-ROM Driver"); 1948 1949static int ide_cd_probe(ide_drive_t *drive) 1950{ 1951 struct cdrom_info *info; 1952 struct gendisk *g; 1953 struct request_sense sense; 1954 1955 ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x", 1956 drive->driver_req, drive->media); 1957 1958 if (!strstr("ide-cdrom", drive->driver_req)) 1959 goto failed; 1960 1961 if (drive->media != ide_cdrom && drive->media != ide_optical) 1962 goto failed; 1963 1964 drive->debug_mask = debug_mask; 1965 drive->irq_handler = cdrom_newpc_intr; 1966 1967 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL); 1968 if (info == NULL) { 1969 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n", 1970 drive->name); 1971 goto failed; 1972 } 1973 1974 g = alloc_disk(1 << PARTN_BITS); 1975 if (!g) 1976 goto out_free_cd; 1977 1978 ide_init_disk(g, drive); 1979 1980 info->dev.parent = &drive->gendev; 1981 info->dev.release = ide_cd_release; 1982 dev_set_name(&info->dev, dev_name(&drive->gendev)); 1983 1984 if (device_register(&info->dev)) 1985 goto out_free_disk; 1986 1987 info->drive = drive; 1988 info->driver = &ide_cdrom_driver; 1989 info->disk = g; 1990 1991 g->private_data = &info->driver; 1992 1993 drive->driver_data = info; 1994 1995 g->minors = 1; 1996 g->driverfs_dev = &drive->gendev; 1997 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE; 1998 if (ide_cdrom_setup(drive)) { 1999 put_device(&info->dev); 2000 goto failed; 2001 } 2002 2003 ide_cd_read_toc(drive, &sense); 2004 g->fops = &idecd_ops; 2005 g->flags |= GENHD_FL_REMOVABLE; 2006 add_disk(g); 2007 return 0; 2008 2009out_free_disk: 2010 put_disk(g); 2011out_free_cd: 2012 kfree(info); 2013failed: 2014 return -ENODEV; 2015} 2016 2017static void __exit ide_cdrom_exit(void) 2018{ 2019 driver_unregister(&ide_cdrom_driver.gen_driver); 2020} 2021 2022static int __init ide_cdrom_init(void) 2023{ 2024 printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n"); 2025 return driver_register(&ide_cdrom_driver.gen_driver); 2026} 2027 2028MODULE_ALIAS("ide:*m-cdrom*"); 2029MODULE_ALIAS("ide-cd"); 2030module_init(ide_cdrom_init); 2031module_exit(ide_cdrom_exit); 2032MODULE_LICENSE("GPL"); 2033