ide-cd.c revision 299c4852fc6995e0665d246927d25cefd4dad754
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 was ended. 300 */ 301static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret) 302{ 303 ide_hwif_t *hwif = drive->hwif; 304 struct request *rq = hwif->rq; 305 int stat, err, sense_key; 306 307 /* check for errors */ 308 stat = hwif->tp_ops->read_status(hwif); 309 310 if (stat_ret) 311 *stat_ret = stat; 312 313 if (OK_STAT(stat, good_stat, BAD_R_STAT)) 314 return 0; 315 316 /* get the IDE error register */ 317 err = ide_read_error(drive); 318 sense_key = err >> 4; 319 320 ide_debug_log(IDE_DBG_RQ, "stat: 0x%x, good_stat: 0x%x, cmd[0]: 0x%x, " 321 "rq->cmd_type: 0x%x, err: 0x%x", 322 stat, good_stat, rq->cmd[0], rq->cmd_type, 323 err); 324 325 if (blk_sense_request(rq)) { 326 /* 327 * We got an error trying to get sense info from the drive 328 * (probably while trying to recover from a former error). 329 * Just give up. 330 */ 331 rq->cmd_flags |= REQ_FAILED; 332 cdrom_end_request(drive, 0); 333 ide_error(drive, "request sense failure", stat); 334 return 1; 335 336 } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) { 337 /* All other functions, except for READ. */ 338 339 /* 340 * if we have an error, pass back CHECK_CONDITION as the 341 * scsi status byte 342 */ 343 if (blk_pc_request(rq) && !rq->errors) 344 rq->errors = SAM_STAT_CHECK_CONDITION; 345 346 /* check for tray open */ 347 if (sense_key == NOT_READY) { 348 cdrom_saw_media_change(drive); 349 } else if (sense_key == UNIT_ATTENTION) { 350 /* check for media change */ 351 cdrom_saw_media_change(drive); 352 return 0; 353 } else if (sense_key == ILLEGAL_REQUEST && 354 rq->cmd[0] == GPCMD_START_STOP_UNIT) { 355 /* 356 * Don't print error message for this condition-- 357 * SFF8090i indicates that 5/24/00 is the correct 358 * response to a request to close the tray if the 359 * drive doesn't have that capability. 360 * cdrom_log_sense() knows this! 361 */ 362 } else if (!(rq->cmd_flags & REQ_QUIET)) { 363 /* otherwise, print an error */ 364 ide_dump_status(drive, "packet command error", stat); 365 } 366 367 rq->cmd_flags |= REQ_FAILED; 368 369 /* 370 * instead of playing games with moving completions around, 371 * remove failed request completely and end it when the 372 * request sense has completed 373 */ 374 goto end_request; 375 376 } else if (blk_fs_request(rq)) { 377 int do_end_request = 0; 378 379 /* handle errors from READ and WRITE requests */ 380 381 if (blk_noretry_request(rq)) 382 do_end_request = 1; 383 384 if (sense_key == NOT_READY) { 385 /* tray open */ 386 if (rq_data_dir(rq) == READ) { 387 cdrom_saw_media_change(drive); 388 389 /* fail the request */ 390 printk(KERN_ERR PFX "%s: tray open\n", 391 drive->name); 392 do_end_request = 1; 393 } else { 394 struct cdrom_info *info = drive->driver_data; 395 396 /* 397 * Allow the drive 5 seconds to recover, some 398 * devices will return this error while flushing 399 * data from cache. 400 */ 401 if (!rq->errors) 402 info->write_timeout = jiffies + 403 ATAPI_WAIT_WRITE_BUSY; 404 rq->errors = 1; 405 if (time_after(jiffies, info->write_timeout)) 406 do_end_request = 1; 407 else { 408 struct request_queue *q = drive->queue; 409 unsigned long flags; 410 411 /* 412 * take a breather relying on the unplug 413 * timer to kick us again 414 */ 415 spin_lock_irqsave(q->queue_lock, flags); 416 blk_plug_device(q); 417 spin_unlock_irqrestore(q->queue_lock, flags); 418 419 return 1; 420 } 421 } 422 } else if (sense_key == UNIT_ATTENTION) { 423 /* media change */ 424 cdrom_saw_media_change(drive); 425 426 /* 427 * Arrange to retry the request but be sure to give up 428 * if we've retried too many times. 429 */ 430 if (++rq->errors > ERROR_MAX) 431 do_end_request = 1; 432 } else if (sense_key == ILLEGAL_REQUEST || 433 sense_key == DATA_PROTECT) { 434 /* 435 * No point in retrying after an illegal request or data 436 * protect error. 437 */ 438 ide_dump_status(drive, "command error", stat); 439 do_end_request = 1; 440 } else if (sense_key == MEDIUM_ERROR) { 441 /* 442 * No point in re-trying a zillion times on a bad 443 * sector. If we got here the error is not correctable. 444 */ 445 ide_dump_status(drive, "media error (bad sector)", 446 stat); 447 do_end_request = 1; 448 } else if (sense_key == BLANK_CHECK) { 449 /* disk appears blank ?? */ 450 ide_dump_status(drive, "media error (blank)", stat); 451 do_end_request = 1; 452 } else if ((err & ~ATA_ABORTED) != 0) { 453 /* go to the default handler for other errors */ 454 ide_error(drive, "cdrom_decode_status", stat); 455 return 1; 456 } else if ((++rq->errors > ERROR_MAX)) { 457 /* we've racked up too many retries, abort */ 458 do_end_request = 1; 459 } 460 461 /* 462 * End a request through request sense analysis when we have 463 * sense data. We need this in order to perform end of media 464 * processing. 465 */ 466 if (do_end_request) 467 goto end_request; 468 469 /* 470 * If we got a CHECK_CONDITION status, queue 471 * a request sense command. 472 */ 473 if (stat & ATA_ERR) 474 cdrom_queue_request_sense(drive, NULL, NULL); 475 } else { 476 blk_dump_rq_flags(rq, PFX "bad rq"); 477 cdrom_end_request(drive, 0); 478 } 479 480 /* retry, or handle the next request */ 481 return 1; 482 483end_request: 484 if (stat & ATA_ERR) { 485 struct request_queue *q = drive->queue; 486 unsigned long flags; 487 488 spin_lock_irqsave(q->queue_lock, flags); 489 blkdev_dequeue_request(rq); 490 spin_unlock_irqrestore(q->queue_lock, flags); 491 492 hwif->rq = NULL; 493 494 cdrom_queue_request_sense(drive, rq->sense, rq); 495 } else 496 cdrom_end_request(drive, 0); 497 498 return 1; 499} 500 501/* 502 * Check the contents of the interrupt reason register from the cdrom 503 * and attempt to recover if there are problems. Returns 0 if everything's 504 * ok; nonzero if the request has been terminated. 505 */ 506static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq, 507 int len, int ireason, int rw) 508{ 509 ide_hwif_t *hwif = drive->hwif; 510 511 ide_debug_log(IDE_DBG_FUNC, "ireason: 0x%x, rw: 0x%x", ireason, rw); 512 513 /* 514 * ireason == 0: the drive wants to receive data from us 515 * ireason == 2: the drive is expecting to transfer data to us 516 */ 517 if (ireason == (!rw << 1)) 518 return 0; 519 else if (ireason == (rw << 1)) { 520 521 /* whoops... */ 522 printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n", 523 drive->name, __func__); 524 525 ide_pad_transfer(drive, rw, len); 526 } else if (rw == 0 && ireason == 1) { 527 /* 528 * Some drives (ASUS) seem to tell us that status info is 529 * available. Just get it and ignore. 530 */ 531 (void)hwif->tp_ops->read_status(hwif); 532 return 0; 533 } else { 534 /* drive wants a command packet, or invalid ireason... */ 535 printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n", 536 drive->name, __func__, ireason); 537 } 538 539 if (rq->cmd_type == REQ_TYPE_ATA_PC) 540 rq->cmd_flags |= REQ_FAILED; 541 542 cdrom_end_request(drive, 0); 543 return -1; 544} 545 546/* 547 * Assume that the drive will always provide data in multiples of at least 548 * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise. 549 */ 550static int ide_cd_check_transfer_size(ide_drive_t *drive, int len) 551{ 552 ide_debug_log(IDE_DBG_FUNC, "len: %d", len); 553 554 if ((len % SECTOR_SIZE) == 0) 555 return 0; 556 557 printk(KERN_ERR PFX "%s: %s: Bad transfer size %d\n", drive->name, 558 __func__, len); 559 560 if (drive->atapi_flags & IDE_AFLAG_LIMIT_NFRAMES) 561 printk(KERN_ERR PFX "This drive is not supported by this " 562 "version of the driver\n"); 563 else { 564 printk(KERN_ERR PFX "Trying to limit transfer sizes\n"); 565 drive->atapi_flags |= IDE_AFLAG_LIMIT_NFRAMES; 566 } 567 568 return 1; 569} 570 571static ide_startstop_t ide_cd_prepare_rw_request(ide_drive_t *drive, 572 struct request *rq) 573{ 574 ide_debug_log(IDE_DBG_RQ, "rq->cmd_flags: 0x%x", rq->cmd_flags); 575 576 if (rq_data_dir(rq) == READ) { 577 unsigned short sectors_per_frame = 578 queue_hardsect_size(drive->queue) >> SECTOR_BITS; 579 int nskip = rq->sector & (sectors_per_frame - 1); 580 581 /* 582 * If the requested sector doesn't start on a frame boundary, 583 * we must adjust the start of the transfer so that it does, 584 * and remember to skip the first few sectors. 585 * 586 * If the rq->current_nr_sectors field is larger than the size 587 * of the buffer, it will mean that we're to skip a number of 588 * sectors equal to the amount by which rq->current_nr_sectors 589 * is larger than the buffer size. 590 */ 591 if (nskip > 0) { 592 /* sanity check... */ 593 if (rq->current_nr_sectors != 594 bio_cur_sectors(rq->bio)) { 595 printk(KERN_ERR PFX "%s: %s: buffer botch (%u)\n", 596 drive->name, __func__, 597 rq->current_nr_sectors); 598 cdrom_end_request(drive, 0); 599 return ide_stopped; 600 } 601 rq->current_nr_sectors += nskip; 602 } 603 } 604 605 /* set up the command */ 606 rq->timeout = ATAPI_WAIT_PC; 607 608 return ide_started; 609} 610 611/* 612 * Fix up a possibly partially-processed request so that we can start it over 613 * entirely, or even put it back on the request queue. 614 */ 615static void ide_cd_restore_request(ide_drive_t *drive, struct request *rq) 616{ 617 618 ide_debug_log(IDE_DBG_FUNC, "enter"); 619 620 if (rq->buffer != bio_data(rq->bio)) { 621 sector_t n = 622 (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE; 623 624 rq->buffer = bio_data(rq->bio); 625 rq->nr_sectors += n; 626 rq->sector -= n; 627 } 628 rq->current_nr_sectors = bio_cur_sectors(rq->bio); 629 rq->hard_cur_sectors = rq->current_nr_sectors; 630 rq->hard_nr_sectors = rq->nr_sectors; 631 rq->hard_sector = rq->sector; 632 rq->q->prep_rq_fn(rq->q, rq); 633} 634 635static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct request *rq) 636{ 637 ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]); 638 639 /* 640 * Some of the trailing request sense fields are optional, 641 * and some drives don't send them. Sigh. 642 */ 643 if (rq->cmd[0] == GPCMD_REQUEST_SENSE && 644 rq->data_len > 0 && rq->data_len <= 5) 645 while (rq->data_len > 0) { 646 *(u8 *)rq->data++ = 0; 647 --rq->data_len; 648 } 649} 650 651int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd, 652 int write, void *buffer, unsigned *bufflen, 653 struct request_sense *sense, int timeout, 654 unsigned int cmd_flags) 655{ 656 struct cdrom_info *info = drive->driver_data; 657 struct request_sense local_sense; 658 int retries = 10; 659 unsigned int flags = 0; 660 661 if (!sense) 662 sense = &local_sense; 663 664 ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, " 665 "cmd_flags: 0x%x", 666 cmd[0], write, timeout, cmd_flags); 667 668 /* start of retry loop */ 669 do { 670 struct request *rq; 671 int error; 672 673 rq = blk_get_request(drive->queue, write, __GFP_WAIT); 674 675 memcpy(rq->cmd, cmd, BLK_MAX_CDB); 676 rq->cmd_type = REQ_TYPE_ATA_PC; 677 rq->sense = sense; 678 rq->cmd_flags |= cmd_flags; 679 rq->timeout = timeout; 680 if (buffer) { 681 rq->data = buffer; 682 rq->data_len = *bufflen; 683 } 684 685 error = blk_execute_rq(drive->queue, info->disk, rq, 0); 686 687 if (buffer) 688 *bufflen = rq->data_len; 689 690 flags = rq->cmd_flags; 691 blk_put_request(rq); 692 693 /* 694 * FIXME: we should probably abort/retry or something in case of 695 * failure. 696 */ 697 if (flags & REQ_FAILED) { 698 /* 699 * The request failed. Retry if it was due to a unit 700 * attention status (usually means media was changed). 701 */ 702 struct request_sense *reqbuf = sense; 703 704 if (reqbuf->sense_key == UNIT_ATTENTION) 705 cdrom_saw_media_change(drive); 706 else if (reqbuf->sense_key == NOT_READY && 707 reqbuf->asc == 4 && reqbuf->ascq != 4) { 708 /* 709 * The drive is in the process of loading 710 * a disk. Retry, but wait a little to give 711 * the drive time to complete the load. 712 */ 713 ssleep(2); 714 } else { 715 /* otherwise, don't retry */ 716 retries = 0; 717 } 718 --retries; 719 } 720 721 /* end of retry loop */ 722 } while ((flags & REQ_FAILED) && retries >= 0); 723 724 /* return an error if the command failed */ 725 return (flags & REQ_FAILED) ? -EIO : 0; 726} 727 728/* 729 * Called from blk_end_request_callback() after the data of the request is 730 * completed and before the request itself is completed. By returning value '1', 731 * blk_end_request_callback() returns immediately without completing it. 732 */ 733static int cdrom_newpc_intr_dummy_cb(struct request *rq) 734{ 735 return 1; 736} 737 738static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive) 739{ 740 ide_hwif_t *hwif = drive->hwif; 741 struct request *rq = hwif->rq; 742 xfer_func_t *xferfunc; 743 ide_expiry_t *expiry = NULL; 744 int dma_error = 0, dma, stat, thislen, uptodate = 0; 745 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0; 746 unsigned int timeout; 747 u16 len; 748 u8 ireason; 749 750 ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x", 751 rq->cmd[0], write); 752 753 /* check for errors */ 754 dma = drive->dma; 755 if (dma) { 756 drive->dma = 0; 757 dma_error = hwif->dma_ops->dma_end(drive); 758 if (dma_error) { 759 printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name, 760 write ? "write" : "read"); 761 ide_dma_off(drive); 762 } 763 } 764 765 if (cdrom_decode_status(drive, 0, &stat)) 766 return ide_stopped; 767 768 /* using dma, transfer is complete now */ 769 if (dma) { 770 if (dma_error) 771 return ide_error(drive, "dma error", stat); 772 if (blk_fs_request(rq)) { 773 ide_complete_rq(drive, 0, rq->nr_sectors 774 ? (rq->nr_sectors << 9) : ide_rq_bytes(rq)); 775 return ide_stopped; 776 } else if (rq->cmd_type == REQ_TYPE_ATA_PC && !rq->bio) { 777 ide_complete_rq(drive, 0, 512); 778 return ide_stopped; 779 } 780 goto end_request; 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 cdrom_end_request(drive, uptodate); 810 return ide_stopped; 811 } else if (!blk_pc_request(rq)) { 812 ide_cd_request_sense_fixup(drive, rq); 813 /* complain if we still have data left to transfer */ 814 uptodate = rq->data_len ? 0 : 1; 815 } 816 goto end_request; 817 } 818 819 /* check which way to transfer data */ 820 if (ide_cd_check_ireason(drive, rq, len, ireason, write)) 821 return ide_stopped; 822 823 if (blk_fs_request(rq)) { 824 if (write == 0) { 825 int nskip; 826 827 if (ide_cd_check_transfer_size(drive, len)) { 828 cdrom_end_request(drive, 0); 829 return ide_stopped; 830 } 831 832 /* 833 * First, figure out if we need to bit-bucket 834 * any of the leading sectors. 835 */ 836 nskip = min_t(int, rq->current_nr_sectors 837 - bio_cur_sectors(rq->bio), 838 thislen >> 9); 839 if (nskip > 0) { 840 ide_pad_transfer(drive, write, nskip << 9); 841 rq->current_nr_sectors -= nskip; 842 thislen -= (nskip << 9); 843 } 844 } 845 } 846 847 if (ireason == 0) { 848 write = 1; 849 xferfunc = hwif->tp_ops->output_data; 850 } else { 851 write = 0; 852 xferfunc = hwif->tp_ops->input_data; 853 } 854 855 ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, " 856 "ireason: 0x%x", 857 rq->cmd_type, ireason); 858 859 /* transfer data */ 860 while (thislen > 0) { 861 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data; 862 int blen = rq->data_len; 863 864 /* bio backed? */ 865 if (rq->bio) { 866 if (blk_fs_request(rq)) { 867 ptr = rq->buffer; 868 blen = rq->current_nr_sectors << 9; 869 } else { 870 ptr = bio_data(rq->bio); 871 blen = bio_iovec(rq->bio)->bv_len; 872 } 873 } 874 875 if (!ptr) { 876 if (blk_fs_request(rq) && !write) 877 /* 878 * If the buffers are full, pipe the rest into 879 * oblivion. 880 */ 881 ide_pad_transfer(drive, 0, thislen); 882 else { 883 printk(KERN_ERR PFX "%s: confused, missing data\n", 884 drive->name); 885 blk_dump_rq_flags(rq, rq_data_dir(rq) 886 ? "cdrom_newpc_intr, write" 887 : "cdrom_newpc_intr, read"); 888 } 889 break; 890 } 891 892 if (blen > thislen) 893 blen = thislen; 894 895 xferfunc(drive, NULL, ptr, blen); 896 897 thislen -= blen; 898 len -= blen; 899 900 if (blk_fs_request(rq)) { 901 rq->buffer += blen; 902 rq->nr_sectors -= (blen >> 9); 903 rq->current_nr_sectors -= (blen >> 9); 904 rq->sector += (blen >> 9); 905 906 if (rq->current_nr_sectors == 0 && rq->nr_sectors) 907 cdrom_end_request(drive, 1); 908 } else { 909 rq->data_len -= blen; 910 911 /* 912 * The request can't be completed until DRQ is cleared. 913 * So complete the data, but don't complete the request 914 * using the dummy function for the callback feature 915 * of blk_end_request_callback(). 916 */ 917 if (rq->bio) 918 blk_end_request_callback(rq, 0, blen, 919 cdrom_newpc_intr_dummy_cb); 920 else 921 rq->data += blen; 922 } 923 if (!write && blk_sense_request(rq)) 924 rq->sense_len += blen; 925 } 926 927 /* pad, if necessary */ 928 if (!blk_fs_request(rq) && len > 0) 929 ide_pad_transfer(drive, write, len); 930 931 if (blk_pc_request(rq)) { 932 timeout = rq->timeout; 933 } else { 934 timeout = ATAPI_WAIT_PC; 935 if (!blk_fs_request(rq)) 936 expiry = ide_cd_expiry; 937 } 938 939 hwif->expiry = expiry; 940 ide_set_handler(drive, cdrom_newpc_intr, timeout); 941 return ide_started; 942 943end_request: 944 if (blk_pc_request(rq)) { 945 unsigned int dlen = rq->data_len; 946 947 if (dma) 948 rq->data_len = 0; 949 950 if (blk_end_request(rq, 0, dlen)) 951 BUG(); 952 953 hwif->rq = NULL; 954 } else { 955 if (!uptodate) 956 rq->cmd_flags |= REQ_FAILED; 957 cdrom_end_request(drive, uptodate); 958 } 959 return ide_stopped; 960} 961 962static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq) 963{ 964 struct cdrom_info *cd = drive->driver_data; 965 int write = rq_data_dir(rq) == WRITE; 966 unsigned short sectors_per_frame = 967 queue_hardsect_size(drive->queue) >> SECTOR_BITS; 968 969 ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, write: 0x%x, " 970 "secs_per_frame: %u", 971 rq->cmd[0], write, sectors_per_frame); 972 973 if (write) { 974 /* disk has become write protected */ 975 if (get_disk_ro(cd->disk)) { 976 cdrom_end_request(drive, 0); 977 return ide_stopped; 978 } 979 } else { 980 /* 981 * We may be retrying this request after an error. Fix up any 982 * weirdness which might be present in the request packet. 983 */ 984 ide_cd_restore_request(drive, rq); 985 } 986 987 /* use DMA, if possible / writes *must* be hardware frame aligned */ 988 if ((rq->nr_sectors & (sectors_per_frame - 1)) || 989 (rq->sector & (sectors_per_frame - 1))) { 990 if (write) { 991 cdrom_end_request(drive, 0); 992 return ide_stopped; 993 } 994 drive->dma = 0; 995 } else 996 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA); 997 998 if (write) 999 cd->devinfo.media_written = 1; 1000 1001 return ide_started; 1002} 1003 1004static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq) 1005{ 1006 1007 ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x", 1008 rq->cmd[0], rq->cmd_type); 1009 1010 if (blk_pc_request(rq)) 1011 rq->cmd_flags |= REQ_QUIET; 1012 else 1013 rq->cmd_flags &= ~REQ_FAILED; 1014 1015 drive->dma = 0; 1016 1017 /* sg request */ 1018 if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) { 1019 struct request_queue *q = drive->queue; 1020 unsigned int alignment; 1021 char *buf; 1022 1023 if (rq->bio) 1024 buf = bio_data(rq->bio); 1025 else 1026 buf = rq->data; 1027 1028 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA); 1029 1030 /* 1031 * check if dma is safe 1032 * 1033 * NOTE! The "len" and "addr" checks should possibly have 1034 * separate masks. 1035 */ 1036 alignment = queue_dma_alignment(q) | q->dma_pad_mask; 1037 if ((unsigned long)buf & alignment 1038 || rq->data_len & q->dma_pad_mask 1039 || object_is_on_stack(buf)) 1040 drive->dma = 0; 1041 } 1042} 1043 1044static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq, 1045 sector_t block) 1046{ 1047 struct ide_cmd cmd; 1048 1049 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu", 1050 rq->cmd[0], (unsigned long long)block); 1051 1052 if (drive->debug_mask & IDE_DBG_RQ) 1053 blk_dump_rq_flags(rq, "ide_cd_do_request"); 1054 1055 if (blk_fs_request(rq)) { 1056 if (cdrom_start_rw(drive, rq) == ide_stopped) 1057 return ide_stopped; 1058 1059 if (ide_cd_prepare_rw_request(drive, rq) == ide_stopped) 1060 return ide_stopped; 1061 } else if (blk_sense_request(rq) || blk_pc_request(rq) || 1062 rq->cmd_type == REQ_TYPE_ATA_PC) { 1063 if (!rq->timeout) 1064 rq->timeout = ATAPI_WAIT_PC; 1065 1066 cdrom_do_block_pc(drive, rq); 1067 } else if (blk_special_request(rq)) { 1068 /* right now this can only be a reset... */ 1069 cdrom_end_request(drive, 1); 1070 return ide_stopped; 1071 } else { 1072 blk_dump_rq_flags(rq, DRV_NAME " bad flags"); 1073 cdrom_end_request(drive, 0); 1074 return ide_stopped; 1075 } 1076 1077 memset(&cmd, 0, sizeof(cmd)); 1078 1079 if (rq_data_dir(rq)) 1080 cmd.tf_flags |= IDE_TFLAG_WRITE; 1081 1082 cmd.rq = rq; 1083 1084 return ide_issue_pc(drive, &cmd); 1085} 1086 1087/* 1088 * Ioctl handling. 1089 * 1090 * Routines which queue packet commands take as a final argument a pointer to a 1091 * request_sense struct. If execution of the command results in an error with a 1092 * CHECK CONDITION status, this structure will be filled with the results of the 1093 * subsequent request sense command. The pointer can also be NULL, in which case 1094 * no sense information is returned. 1095 */ 1096static void msf_from_bcd(struct atapi_msf *msf) 1097{ 1098 msf->minute = bcd2bin(msf->minute); 1099 msf->second = bcd2bin(msf->second); 1100 msf->frame = bcd2bin(msf->frame); 1101} 1102 1103int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense) 1104{ 1105 struct cdrom_info *info = drive->driver_data; 1106 struct cdrom_device_info *cdi = &info->devinfo; 1107 unsigned char cmd[BLK_MAX_CDB]; 1108 1109 ide_debug_log(IDE_DBG_FUNC, "enter"); 1110 1111 memset(cmd, 0, BLK_MAX_CDB); 1112 cmd[0] = GPCMD_TEST_UNIT_READY; 1113 1114 /* 1115 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs 1116 * instead of supporting the LOAD_UNLOAD opcode. 1117 */ 1118 cmd[7] = cdi->sanyo_slot % 3; 1119 1120 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET); 1121} 1122 1123static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity, 1124 unsigned long *sectors_per_frame, 1125 struct request_sense *sense) 1126{ 1127 struct { 1128 __be32 lba; 1129 __be32 blocklen; 1130 } capbuf; 1131 1132 int stat; 1133 unsigned char cmd[BLK_MAX_CDB]; 1134 unsigned len = sizeof(capbuf); 1135 u32 blocklen; 1136 1137 ide_debug_log(IDE_DBG_FUNC, "enter"); 1138 1139 memset(cmd, 0, BLK_MAX_CDB); 1140 cmd[0] = GPCMD_READ_CDVD_CAPACITY; 1141 1142 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0, 1143 REQ_QUIET); 1144 if (stat) 1145 return stat; 1146 1147 /* 1148 * Sanity check the given block size 1149 */ 1150 blocklen = be32_to_cpu(capbuf.blocklen); 1151 switch (blocklen) { 1152 case 512: 1153 case 1024: 1154 case 2048: 1155 case 4096: 1156 break; 1157 default: 1158 printk(KERN_ERR PFX "%s: weird block size %u\n", 1159 drive->name, blocklen); 1160 printk(KERN_ERR PFX "%s: default to 2kb block size\n", 1161 drive->name); 1162 blocklen = 2048; 1163 break; 1164 } 1165 1166 *capacity = 1 + be32_to_cpu(capbuf.lba); 1167 *sectors_per_frame = blocklen >> SECTOR_BITS; 1168 1169 ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu", 1170 *capacity, *sectors_per_frame); 1171 1172 return 0; 1173} 1174 1175static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag, 1176 int format, char *buf, int buflen, 1177 struct request_sense *sense) 1178{ 1179 unsigned char cmd[BLK_MAX_CDB]; 1180 1181 ide_debug_log(IDE_DBG_FUNC, "enter"); 1182 1183 memset(cmd, 0, BLK_MAX_CDB); 1184 1185 cmd[0] = GPCMD_READ_TOC_PMA_ATIP; 1186 cmd[6] = trackno; 1187 cmd[7] = (buflen >> 8); 1188 cmd[8] = (buflen & 0xff); 1189 cmd[9] = (format << 6); 1190 1191 if (msf_flag) 1192 cmd[1] = 2; 1193 1194 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET); 1195} 1196 1197/* Try to read the entire TOC for the disk into our internal buffer. */ 1198int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense) 1199{ 1200 int stat, ntracks, i; 1201 struct cdrom_info *info = drive->driver_data; 1202 struct cdrom_device_info *cdi = &info->devinfo; 1203 struct atapi_toc *toc = info->toc; 1204 struct { 1205 struct atapi_toc_header hdr; 1206 struct atapi_toc_entry ent; 1207 } ms_tmp; 1208 long last_written; 1209 unsigned long sectors_per_frame = SECTORS_PER_FRAME; 1210 1211 ide_debug_log(IDE_DBG_FUNC, "enter"); 1212 1213 if (toc == NULL) { 1214 /* try to allocate space */ 1215 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL); 1216 if (toc == NULL) { 1217 printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n", 1218 drive->name); 1219 return -ENOMEM; 1220 } 1221 info->toc = toc; 1222 } 1223 1224 /* 1225 * Check to see if the existing data is still valid. If it is, 1226 * just return. 1227 */ 1228 (void) cdrom_check_status(drive, sense); 1229 1230 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID) 1231 return 0; 1232 1233 /* try to get the total cdrom capacity and sector size */ 1234 stat = cdrom_read_capacity(drive, &toc->capacity, §ors_per_frame, 1235 sense); 1236 if (stat) 1237 toc->capacity = 0x1fffff; 1238 1239 set_capacity(info->disk, toc->capacity * sectors_per_frame); 1240 /* save a private copy of the TOC capacity for error handling */ 1241 drive->probed_capacity = toc->capacity * sectors_per_frame; 1242 1243 blk_queue_hardsect_size(drive->queue, 1244 sectors_per_frame << SECTOR_BITS); 1245 1246 /* first read just the header, so we know how long the TOC is */ 1247 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr, 1248 sizeof(struct atapi_toc_header), sense); 1249 if (stat) 1250 return stat; 1251 1252 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1253 toc->hdr.first_track = bcd2bin(toc->hdr.first_track); 1254 toc->hdr.last_track = bcd2bin(toc->hdr.last_track); 1255 } 1256 1257 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1; 1258 if (ntracks <= 0) 1259 return -EIO; 1260 if (ntracks > MAX_TRACKS) 1261 ntracks = MAX_TRACKS; 1262 1263 /* now read the whole schmeer */ 1264 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0, 1265 (char *)&toc->hdr, 1266 sizeof(struct atapi_toc_header) + 1267 (ntracks + 1) * 1268 sizeof(struct atapi_toc_entry), sense); 1269 1270 if (stat && toc->hdr.first_track > 1) { 1271 /* 1272 * Cds with CDI tracks only don't have any TOC entries, despite 1273 * of this the returned values are 1274 * first_track == last_track = number of CDI tracks + 1, 1275 * so that this case is indistinguishable from the same layout 1276 * plus an additional audio track. If we get an error for the 1277 * regular case, we assume a CDI without additional audio 1278 * tracks. In this case the readable TOC is empty (CDI tracks 1279 * are not included) and only holds the Leadout entry. 1280 * 1281 * Heiko Eißfeldt. 1282 */ 1283 ntracks = 0; 1284 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0, 1285 (char *)&toc->hdr, 1286 sizeof(struct atapi_toc_header) + 1287 (ntracks + 1) * 1288 sizeof(struct atapi_toc_entry), 1289 sense); 1290 if (stat) 1291 return stat; 1292 1293 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1294 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT); 1295 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT); 1296 } else { 1297 toc->hdr.first_track = CDROM_LEADOUT; 1298 toc->hdr.last_track = CDROM_LEADOUT; 1299 } 1300 } 1301 1302 if (stat) 1303 return stat; 1304 1305 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length); 1306 1307 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1308 toc->hdr.first_track = bcd2bin(toc->hdr.first_track); 1309 toc->hdr.last_track = bcd2bin(toc->hdr.last_track); 1310 } 1311 1312 for (i = 0; i <= ntracks; i++) { 1313 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) { 1314 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) 1315 toc->ent[i].track = bcd2bin(toc->ent[i].track); 1316 msf_from_bcd(&toc->ent[i].addr.msf); 1317 } 1318 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute, 1319 toc->ent[i].addr.msf.second, 1320 toc->ent[i].addr.msf.frame); 1321 } 1322 1323 if (toc->hdr.first_track != CDROM_LEADOUT) { 1324 /* read the multisession information */ 1325 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp, 1326 sizeof(ms_tmp), sense); 1327 if (stat) 1328 return stat; 1329 1330 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba); 1331 } else { 1332 ms_tmp.hdr.last_track = CDROM_LEADOUT; 1333 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track; 1334 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */ 1335 } 1336 1337 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) { 1338 /* re-read multisession information using MSF format */ 1339 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp, 1340 sizeof(ms_tmp), sense); 1341 if (stat) 1342 return stat; 1343 1344 msf_from_bcd(&ms_tmp.ent.addr.msf); 1345 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute, 1346 ms_tmp.ent.addr.msf.second, 1347 ms_tmp.ent.addr.msf.frame); 1348 } 1349 1350 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track); 1351 1352 /* now try to get the total cdrom capacity */ 1353 stat = cdrom_get_last_written(cdi, &last_written); 1354 if (!stat && (last_written > toc->capacity)) { 1355 toc->capacity = last_written; 1356 set_capacity(info->disk, toc->capacity * sectors_per_frame); 1357 drive->probed_capacity = toc->capacity * sectors_per_frame; 1358 } 1359 1360 /* Remember that we've read this stuff. */ 1361 drive->atapi_flags |= IDE_AFLAG_TOC_VALID; 1362 1363 return 0; 1364} 1365 1366int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf) 1367{ 1368 struct cdrom_info *info = drive->driver_data; 1369 struct cdrom_device_info *cdi = &info->devinfo; 1370 struct packet_command cgc; 1371 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE; 1372 1373 ide_debug_log(IDE_DBG_FUNC, "enter"); 1374 1375 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0) 1376 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE; 1377 1378 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN); 1379 do { 1380 /* we seem to get stat=0x01,err=0x00 the first time (??) */ 1381 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0); 1382 if (!stat) 1383 break; 1384 } while (--attempts); 1385 return stat; 1386} 1387 1388void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf) 1389{ 1390 struct cdrom_info *cd = drive->driver_data; 1391 u16 curspeed, maxspeed; 1392 1393 ide_debug_log(IDE_DBG_FUNC, "enter"); 1394 1395 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) { 1396 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]); 1397 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]); 1398 } else { 1399 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]); 1400 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]); 1401 } 1402 1403 ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u", 1404 curspeed, maxspeed); 1405 1406 cd->current_speed = (curspeed + (176/2)) / 176; 1407 cd->max_speed = (maxspeed + (176/2)) / 176; 1408} 1409 1410#define IDE_CD_CAPABILITIES \ 1411 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \ 1412 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \ 1413 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \ 1414 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \ 1415 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM) 1416 1417static struct cdrom_device_ops ide_cdrom_dops = { 1418 .open = ide_cdrom_open_real, 1419 .release = ide_cdrom_release_real, 1420 .drive_status = ide_cdrom_drive_status, 1421 .media_changed = ide_cdrom_check_media_change_real, 1422 .tray_move = ide_cdrom_tray_move, 1423 .lock_door = ide_cdrom_lock_door, 1424 .select_speed = ide_cdrom_select_speed, 1425 .get_last_session = ide_cdrom_get_last_session, 1426 .get_mcn = ide_cdrom_get_mcn, 1427 .reset = ide_cdrom_reset, 1428 .audio_ioctl = ide_cdrom_audio_ioctl, 1429 .capability = IDE_CD_CAPABILITIES, 1430 .generic_packet = ide_cdrom_packet, 1431}; 1432 1433static int ide_cdrom_register(ide_drive_t *drive, int nslots) 1434{ 1435 struct cdrom_info *info = drive->driver_data; 1436 struct cdrom_device_info *devinfo = &info->devinfo; 1437 1438 ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots); 1439 1440 devinfo->ops = &ide_cdrom_dops; 1441 devinfo->speed = info->current_speed; 1442 devinfo->capacity = nslots; 1443 devinfo->handle = drive; 1444 strcpy(devinfo->name, drive->name); 1445 1446 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT) 1447 devinfo->mask |= CDC_SELECT_SPEED; 1448 1449 devinfo->disk = info->disk; 1450 return register_cdrom(devinfo); 1451} 1452 1453static int ide_cdrom_probe_capabilities(ide_drive_t *drive) 1454{ 1455 struct cdrom_info *cd = drive->driver_data; 1456 struct cdrom_device_info *cdi = &cd->devinfo; 1457 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE]; 1458 mechtype_t mechtype; 1459 int nslots = 1; 1460 1461 ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx", 1462 drive->media, drive->atapi_flags); 1463 1464 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R | 1465 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO | 1466 CDC_MO_DRIVE | CDC_RAM); 1467 1468 if (drive->media == ide_optical) { 1469 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM); 1470 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n", 1471 drive->name); 1472 return nslots; 1473 } 1474 1475 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) { 1476 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT; 1477 cdi->mask &= ~CDC_PLAY_AUDIO; 1478 return nslots; 1479 } 1480 1481 /* 1482 * We have to cheat a little here. the packet will eventually be queued 1483 * with ide_cdrom_packet(), which extracts the drive from cdi->handle. 1484 * Since this device hasn't been registered with the Uniform layer yet, 1485 * it can't do this. Same goes for cdi->ops. 1486 */ 1487 cdi->handle = drive; 1488 cdi->ops = &ide_cdrom_dops; 1489 1490 if (ide_cdrom_get_capabilities(drive, buf)) 1491 return 0; 1492 1493 if ((buf[8 + 6] & 0x01) == 0) 1494 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING; 1495 if (buf[8 + 6] & 0x08) 1496 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT; 1497 if (buf[8 + 3] & 0x01) 1498 cdi->mask &= ~CDC_CD_R; 1499 if (buf[8 + 3] & 0x02) 1500 cdi->mask &= ~(CDC_CD_RW | CDC_RAM); 1501 if (buf[8 + 2] & 0x38) 1502 cdi->mask &= ~CDC_DVD; 1503 if (buf[8 + 3] & 0x20) 1504 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM); 1505 if (buf[8 + 3] & 0x10) 1506 cdi->mask &= ~CDC_DVD_R; 1507 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK)) 1508 cdi->mask &= ~CDC_PLAY_AUDIO; 1509 1510 mechtype = buf[8 + 6] >> 5; 1511 if (mechtype == mechtype_caddy || 1512 mechtype == mechtype_popup || 1513 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE)) 1514 cdi->mask |= CDC_CLOSE_TRAY; 1515 1516 if (cdi->sanyo_slot > 0) { 1517 cdi->mask &= ~CDC_SELECT_DISC; 1518 nslots = 3; 1519 } else if (mechtype == mechtype_individual_changer || 1520 mechtype == mechtype_cartridge_changer) { 1521 nslots = cdrom_number_of_slots(cdi); 1522 if (nslots > 1) 1523 cdi->mask &= ~CDC_SELECT_DISC; 1524 } 1525 1526 ide_cdrom_update_speed(drive, buf); 1527 1528 printk(KERN_INFO PFX "%s: ATAPI", drive->name); 1529 1530 /* don't print speed if the drive reported 0 */ 1531 if (cd->max_speed) 1532 printk(KERN_CONT " %dX", cd->max_speed); 1533 1534 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM"); 1535 1536 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0) 1537 printk(KERN_CONT " DVD%s%s", 1538 (cdi->mask & CDC_DVD_R) ? "" : "-R", 1539 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM"); 1540 1541 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0) 1542 printk(KERN_CONT " CD%s%s", 1543 (cdi->mask & CDC_CD_R) ? "" : "-R", 1544 (cdi->mask & CDC_CD_RW) ? "" : "/RW"); 1545 1546 if ((cdi->mask & CDC_SELECT_DISC) == 0) 1547 printk(KERN_CONT " changer w/%d slots", nslots); 1548 else 1549 printk(KERN_CONT " drive"); 1550 1551 printk(KERN_CONT ", %dkB Cache\n", 1552 be16_to_cpup((__be16 *)&buf[8 + 12])); 1553 1554 return nslots; 1555} 1556 1557/* standard prep_rq_fn that builds 10 byte cmds */ 1558static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq) 1559{ 1560 int hard_sect = queue_hardsect_size(q); 1561 long block = (long)rq->hard_sector / (hard_sect >> 9); 1562 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9); 1563 1564 memset(rq->cmd, 0, BLK_MAX_CDB); 1565 1566 if (rq_data_dir(rq) == READ) 1567 rq->cmd[0] = GPCMD_READ_10; 1568 else 1569 rq->cmd[0] = GPCMD_WRITE_10; 1570 1571 /* 1572 * fill in lba 1573 */ 1574 rq->cmd[2] = (block >> 24) & 0xff; 1575 rq->cmd[3] = (block >> 16) & 0xff; 1576 rq->cmd[4] = (block >> 8) & 0xff; 1577 rq->cmd[5] = block & 0xff; 1578 1579 /* 1580 * and transfer length 1581 */ 1582 rq->cmd[7] = (blocks >> 8) & 0xff; 1583 rq->cmd[8] = blocks & 0xff; 1584 rq->cmd_len = 10; 1585 return BLKPREP_OK; 1586} 1587 1588/* 1589 * Most of the SCSI commands are supported directly by ATAPI devices. 1590 * This transform handles the few exceptions. 1591 */ 1592static int ide_cdrom_prep_pc(struct request *rq) 1593{ 1594 u8 *c = rq->cmd; 1595 1596 /* transform 6-byte read/write commands to the 10-byte version */ 1597 if (c[0] == READ_6 || c[0] == WRITE_6) { 1598 c[8] = c[4]; 1599 c[5] = c[3]; 1600 c[4] = c[2]; 1601 c[3] = c[1] & 0x1f; 1602 c[2] = 0; 1603 c[1] &= 0xe0; 1604 c[0] += (READ_10 - READ_6); 1605 rq->cmd_len = 10; 1606 return BLKPREP_OK; 1607 } 1608 1609 /* 1610 * it's silly to pretend we understand 6-byte sense commands, just 1611 * reject with ILLEGAL_REQUEST and the caller should take the 1612 * appropriate action 1613 */ 1614 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) { 1615 rq->errors = ILLEGAL_REQUEST; 1616 return BLKPREP_KILL; 1617 } 1618 1619 return BLKPREP_OK; 1620} 1621 1622static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq) 1623{ 1624 if (blk_fs_request(rq)) 1625 return ide_cdrom_prep_fs(q, rq); 1626 else if (blk_pc_request(rq)) 1627 return ide_cdrom_prep_pc(rq); 1628 1629 return 0; 1630} 1631 1632struct cd_list_entry { 1633 const char *id_model; 1634 const char *id_firmware; 1635 unsigned int cd_flags; 1636}; 1637 1638#ifdef CONFIG_IDE_PROC_FS 1639static sector_t ide_cdrom_capacity(ide_drive_t *drive) 1640{ 1641 unsigned long capacity, sectors_per_frame; 1642 1643 if (cdrom_read_capacity(drive, &capacity, §ors_per_frame, NULL)) 1644 return 0; 1645 1646 return capacity * sectors_per_frame; 1647} 1648 1649static int proc_idecd_read_capacity(char *page, char **start, off_t off, 1650 int count, int *eof, void *data) 1651{ 1652 ide_drive_t *drive = data; 1653 int len; 1654 1655 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive)); 1656 PROC_IDE_READ_RETURN(page, start, off, count, eof, len); 1657} 1658 1659static ide_proc_entry_t idecd_proc[] = { 1660 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL }, 1661 { NULL, 0, NULL, NULL } 1662}; 1663 1664static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive) 1665{ 1666 return idecd_proc; 1667} 1668 1669static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive) 1670{ 1671 return NULL; 1672} 1673#endif 1674 1675static const struct cd_list_entry ide_cd_quirks_list[] = { 1676 /* Limit transfer size per interrupt. */ 1677 { "SAMSUNG CD-ROM SCR-2430", NULL, IDE_AFLAG_LIMIT_NFRAMES }, 1678 { "SAMSUNG CD-ROM SCR-2432", NULL, IDE_AFLAG_LIMIT_NFRAMES }, 1679 /* SCR-3231 doesn't support the SET_CD_SPEED command. */ 1680 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT }, 1681 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */ 1682 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD | 1683 IDE_AFLAG_PRE_ATAPI12, }, 1684 /* Vertos 300, some versions of this drive like to talk BCD. */ 1685 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, }, 1686 /* Vertos 600 ESD. */ 1687 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, }, 1688 /* 1689 * Sanyo 3 CD changer uses a non-standard command for CD changing 1690 * (by default standard ATAPI support for CD changers is used). 1691 */ 1692 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD }, 1693 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD }, 1694 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD }, 1695 /* Stingray 8X CD-ROM. */ 1696 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 }, 1697 /* 1698 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length 1699 * mode sense page capabilities size, but older drives break. 1700 */ 1701 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE }, 1702 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE }, 1703 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */ 1704 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS }, 1705 /* 1706 * Some drives used by Apple don't advertise audio play 1707 * but they do support reading TOC & audio datas. 1708 */ 1709 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1710 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1711 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1712 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1713 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1714 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1715 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE }, 1716 { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE }, 1717 { NULL, NULL, 0 } 1718}; 1719 1720static unsigned int ide_cd_flags(u16 *id) 1721{ 1722 const struct cd_list_entry *cle = ide_cd_quirks_list; 1723 1724 while (cle->id_model) { 1725 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 && 1726 (cle->id_firmware == NULL || 1727 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware))) 1728 return cle->cd_flags; 1729 cle++; 1730 } 1731 1732 return 0; 1733} 1734 1735static int ide_cdrom_setup(ide_drive_t *drive) 1736{ 1737 struct cdrom_info *cd = drive->driver_data; 1738 struct cdrom_device_info *cdi = &cd->devinfo; 1739 u16 *id = drive->id; 1740 char *fw_rev = (char *)&id[ATA_ID_FW_REV]; 1741 int nslots; 1742 1743 ide_debug_log(IDE_DBG_PROBE, "enter"); 1744 1745 blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn); 1746 blk_queue_dma_alignment(drive->queue, 31); 1747 blk_queue_update_dma_pad(drive->queue, 15); 1748 drive->queue->unplug_delay = (1 * HZ) / 1000; 1749 if (!drive->queue->unplug_delay) 1750 drive->queue->unplug_delay = 1; 1751 1752 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED; 1753 drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id); 1754 1755 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) && 1756 fw_rev[4] == '1' && fw_rev[6] <= '2') 1757 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD | 1758 IDE_AFLAG_TOCADDR_AS_BCD); 1759 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) && 1760 fw_rev[4] == '1' && fw_rev[6] <= '2') 1761 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD; 1762 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD) 1763 /* 3 => use CD in slot 0 */ 1764 cdi->sanyo_slot = 3; 1765 1766 nslots = ide_cdrom_probe_capabilities(drive); 1767 1768 /* set correct block size */ 1769 blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE); 1770 1771 if (ide_cdrom_register(drive, nslots)) { 1772 printk(KERN_ERR PFX "%s: %s failed to register device with the" 1773 " cdrom driver.\n", drive->name, __func__); 1774 cd->devinfo.handle = NULL; 1775 return 1; 1776 } 1777 1778 ide_proc_register_driver(drive, cd->driver); 1779 return 0; 1780} 1781 1782static void ide_cd_remove(ide_drive_t *drive) 1783{ 1784 struct cdrom_info *info = drive->driver_data; 1785 1786 ide_debug_log(IDE_DBG_FUNC, "enter"); 1787 1788 ide_proc_unregister_driver(drive, info->driver); 1789 device_del(&info->dev); 1790 del_gendisk(info->disk); 1791 1792 mutex_lock(&idecd_ref_mutex); 1793 put_device(&info->dev); 1794 mutex_unlock(&idecd_ref_mutex); 1795} 1796 1797static void ide_cd_release(struct device *dev) 1798{ 1799 struct cdrom_info *info = to_ide_drv(dev, cdrom_info); 1800 struct cdrom_device_info *devinfo = &info->devinfo; 1801 ide_drive_t *drive = info->drive; 1802 struct gendisk *g = info->disk; 1803 1804 ide_debug_log(IDE_DBG_FUNC, "enter"); 1805 1806 kfree(info->toc); 1807 if (devinfo->handle == drive) 1808 unregister_cdrom(devinfo); 1809 drive->driver_data = NULL; 1810 blk_queue_prep_rq(drive->queue, NULL); 1811 g->private_data = NULL; 1812 put_disk(g); 1813 kfree(info); 1814} 1815 1816static int ide_cd_probe(ide_drive_t *); 1817 1818static struct ide_driver ide_cdrom_driver = { 1819 .gen_driver = { 1820 .owner = THIS_MODULE, 1821 .name = "ide-cdrom", 1822 .bus = &ide_bus_type, 1823 }, 1824 .probe = ide_cd_probe, 1825 .remove = ide_cd_remove, 1826 .version = IDECD_VERSION, 1827 .do_request = ide_cd_do_request, 1828#ifdef CONFIG_IDE_PROC_FS 1829 .proc_entries = ide_cd_proc_entries, 1830 .proc_devsets = ide_cd_proc_devsets, 1831#endif 1832}; 1833 1834static int idecd_open(struct block_device *bdev, fmode_t mode) 1835{ 1836 struct cdrom_info *info = ide_cd_get(bdev->bd_disk); 1837 int rc = -ENOMEM; 1838 1839 if (!info) 1840 return -ENXIO; 1841 1842 rc = cdrom_open(&info->devinfo, bdev, mode); 1843 1844 if (rc < 0) 1845 ide_cd_put(info); 1846 1847 return rc; 1848} 1849 1850static int idecd_release(struct gendisk *disk, fmode_t mode) 1851{ 1852 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 1853 1854 cdrom_release(&info->devinfo, mode); 1855 1856 ide_cd_put(info); 1857 1858 return 0; 1859} 1860 1861static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg) 1862{ 1863 struct packet_command cgc; 1864 char buffer[16]; 1865 int stat; 1866 char spindown; 1867 1868 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char))) 1869 return -EFAULT; 1870 1871 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN); 1872 1873 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0); 1874 if (stat) 1875 return stat; 1876 1877 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f); 1878 return cdrom_mode_select(cdi, &cgc); 1879} 1880 1881static int idecd_get_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 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN); 1889 1890 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0); 1891 if (stat) 1892 return stat; 1893 1894 spindown = buffer[11] & 0x0f; 1895 if (copy_to_user((void __user *)arg, &spindown, sizeof(char))) 1896 return -EFAULT; 1897 return 0; 1898} 1899 1900static int idecd_ioctl(struct block_device *bdev, fmode_t mode, 1901 unsigned int cmd, unsigned long arg) 1902{ 1903 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info); 1904 int err; 1905 1906 switch (cmd) { 1907 case CDROMSETSPINDOWN: 1908 return idecd_set_spindown(&info->devinfo, arg); 1909 case CDROMGETSPINDOWN: 1910 return idecd_get_spindown(&info->devinfo, arg); 1911 default: 1912 break; 1913 } 1914 1915 err = generic_ide_ioctl(info->drive, bdev, cmd, arg); 1916 if (err == -EINVAL) 1917 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg); 1918 1919 return err; 1920} 1921 1922static int idecd_media_changed(struct gendisk *disk) 1923{ 1924 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 1925 return cdrom_media_changed(&info->devinfo); 1926} 1927 1928static int idecd_revalidate_disk(struct gendisk *disk) 1929{ 1930 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 1931 struct request_sense sense; 1932 1933 ide_cd_read_toc(info->drive, &sense); 1934 1935 return 0; 1936} 1937 1938static struct block_device_operations idecd_ops = { 1939 .owner = THIS_MODULE, 1940 .open = idecd_open, 1941 .release = idecd_release, 1942 .locked_ioctl = idecd_ioctl, 1943 .media_changed = idecd_media_changed, 1944 .revalidate_disk = idecd_revalidate_disk 1945}; 1946 1947/* module options */ 1948static unsigned long debug_mask; 1949module_param(debug_mask, ulong, 0644); 1950 1951MODULE_DESCRIPTION("ATAPI CD-ROM Driver"); 1952 1953static int ide_cd_probe(ide_drive_t *drive) 1954{ 1955 struct cdrom_info *info; 1956 struct gendisk *g; 1957 struct request_sense sense; 1958 1959 ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x", 1960 drive->driver_req, drive->media); 1961 1962 if (!strstr("ide-cdrom", drive->driver_req)) 1963 goto failed; 1964 1965 if (drive->media != ide_cdrom && drive->media != ide_optical) 1966 goto failed; 1967 1968 drive->debug_mask = debug_mask; 1969 drive->irq_handler = cdrom_newpc_intr; 1970 1971 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL); 1972 if (info == NULL) { 1973 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n", 1974 drive->name); 1975 goto failed; 1976 } 1977 1978 g = alloc_disk(1 << PARTN_BITS); 1979 if (!g) 1980 goto out_free_cd; 1981 1982 ide_init_disk(g, drive); 1983 1984 info->dev.parent = &drive->gendev; 1985 info->dev.release = ide_cd_release; 1986 dev_set_name(&info->dev, dev_name(&drive->gendev)); 1987 1988 if (device_register(&info->dev)) 1989 goto out_free_disk; 1990 1991 info->drive = drive; 1992 info->driver = &ide_cdrom_driver; 1993 info->disk = g; 1994 1995 g->private_data = &info->driver; 1996 1997 drive->driver_data = info; 1998 1999 g->minors = 1; 2000 g->driverfs_dev = &drive->gendev; 2001 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE; 2002 if (ide_cdrom_setup(drive)) { 2003 put_device(&info->dev); 2004 goto failed; 2005 } 2006 2007 ide_cd_read_toc(drive, &sense); 2008 g->fops = &idecd_ops; 2009 g->flags |= GENHD_FL_REMOVABLE; 2010 add_disk(g); 2011 return 0; 2012 2013out_free_disk: 2014 put_disk(g); 2015out_free_cd: 2016 kfree(info); 2017failed: 2018 return -ENODEV; 2019} 2020 2021static void __exit ide_cdrom_exit(void) 2022{ 2023 driver_unregister(&ide_cdrom_driver.gen_driver); 2024} 2025 2026static int __init ide_cdrom_init(void) 2027{ 2028 printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n"); 2029 return driver_register(&ide_cdrom_driver.gen_driver); 2030} 2031 2032MODULE_ALIAS("ide:*m-cdrom*"); 2033MODULE_ALIAS("ide-cd"); 2034module_init(ide_cdrom_init); 2035module_exit(ide_cdrom_exit); 2036MODULE_LICENSE("GPL"); 2037