ide-cd.c revision 984c5e5974227d2d4dba58cdf19af641f89be83f
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 return ide_stopped; 599 } 600 rq->current_nr_sectors += nskip; 601 } 602 } 603 604 /* set up the command */ 605 rq->timeout = ATAPI_WAIT_PC; 606 607 return ide_started; 608} 609 610/* 611 * Fix up a possibly partially-processed request so that we can start it over 612 * entirely, or even put it back on the request queue. 613 */ 614static void ide_cd_restore_request(ide_drive_t *drive, struct request *rq) 615{ 616 617 ide_debug_log(IDE_DBG_FUNC, "enter"); 618 619 if (rq->buffer != bio_data(rq->bio)) { 620 sector_t n = 621 (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE; 622 623 rq->buffer = bio_data(rq->bio); 624 rq->nr_sectors += n; 625 rq->sector -= n; 626 } 627 rq->current_nr_sectors = bio_cur_sectors(rq->bio); 628 rq->hard_cur_sectors = rq->current_nr_sectors; 629 rq->hard_nr_sectors = rq->nr_sectors; 630 rq->hard_sector = rq->sector; 631 rq->q->prep_rq_fn(rq->q, rq); 632} 633 634static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct request *rq) 635{ 636 ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]); 637 638 /* 639 * Some of the trailing request sense fields are optional, 640 * and some drives don't send them. Sigh. 641 */ 642 if (rq->cmd[0] == GPCMD_REQUEST_SENSE && 643 rq->data_len > 0 && rq->data_len <= 5) 644 while (rq->data_len > 0) { 645 *(u8 *)rq->data++ = 0; 646 --rq->data_len; 647 } 648} 649 650int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd, 651 int write, void *buffer, unsigned *bufflen, 652 struct request_sense *sense, int timeout, 653 unsigned int cmd_flags) 654{ 655 struct cdrom_info *info = drive->driver_data; 656 struct request_sense local_sense; 657 int retries = 10; 658 unsigned int flags = 0; 659 660 if (!sense) 661 sense = &local_sense; 662 663 ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, " 664 "cmd_flags: 0x%x", 665 cmd[0], write, timeout, cmd_flags); 666 667 /* start of retry loop */ 668 do { 669 struct request *rq; 670 int error; 671 672 rq = blk_get_request(drive->queue, write, __GFP_WAIT); 673 674 memcpy(rq->cmd, cmd, BLK_MAX_CDB); 675 rq->cmd_type = REQ_TYPE_ATA_PC; 676 rq->sense = sense; 677 rq->cmd_flags |= cmd_flags; 678 rq->timeout = timeout; 679 if (buffer) { 680 rq->data = buffer; 681 rq->data_len = *bufflen; 682 } 683 684 error = blk_execute_rq(drive->queue, info->disk, rq, 0); 685 686 if (buffer) 687 *bufflen = rq->data_len; 688 689 flags = rq->cmd_flags; 690 blk_put_request(rq); 691 692 /* 693 * FIXME: we should probably abort/retry or something in case of 694 * failure. 695 */ 696 if (flags & REQ_FAILED) { 697 /* 698 * The request failed. Retry if it was due to a unit 699 * attention status (usually means media was changed). 700 */ 701 struct request_sense *reqbuf = sense; 702 703 if (reqbuf->sense_key == UNIT_ATTENTION) 704 cdrom_saw_media_change(drive); 705 else if (reqbuf->sense_key == NOT_READY && 706 reqbuf->asc == 4 && reqbuf->ascq != 4) { 707 /* 708 * The drive is in the process of loading 709 * a disk. Retry, but wait a little to give 710 * the drive time to complete the load. 711 */ 712 ssleep(2); 713 } else { 714 /* otherwise, don't retry */ 715 retries = 0; 716 } 717 --retries; 718 } 719 720 /* end of retry loop */ 721 } while ((flags & REQ_FAILED) && retries >= 0); 722 723 /* return an error if the command failed */ 724 return (flags & REQ_FAILED) ? -EIO : 0; 725} 726 727/* 728 * Called from blk_end_request_callback() after the data of the request is 729 * completed and before the request itself is completed. By returning value '1', 730 * blk_end_request_callback() returns immediately without completing it. 731 */ 732static int cdrom_newpc_intr_dummy_cb(struct request *rq) 733{ 734 return 1; 735} 736 737static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive) 738{ 739 ide_hwif_t *hwif = drive->hwif; 740 struct request *rq = hwif->rq; 741 xfer_func_t *xferfunc; 742 ide_expiry_t *expiry = NULL; 743 int dma_error = 0, dma, stat, thislen, uptodate = 0; 744 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0; 745 unsigned int timeout; 746 u16 len; 747 u8 ireason; 748 749 ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x", 750 rq->cmd[0], write); 751 752 /* check for errors */ 753 dma = drive->dma; 754 if (dma) { 755 drive->dma = 0; 756 dma_error = hwif->dma_ops->dma_end(drive); 757 if (dma_error) { 758 printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name, 759 write ? "write" : "read"); 760 ide_dma_off(drive); 761 } 762 } 763 764 if (cdrom_decode_status(drive, 0, &stat)) 765 return ide_stopped; 766 767 /* using dma, transfer is complete now */ 768 if (dma) { 769 if (dma_error) 770 return ide_error(drive, "dma error", stat); 771 if (blk_fs_request(rq)) { 772 ide_complete_rq(drive, 0, rq->nr_sectors 773 ? (rq->nr_sectors << 9) : ide_rq_bytes(rq)); 774 return ide_stopped; 775 } else if (rq->cmd_type == REQ_TYPE_ATA_PC && !rq->bio) { 776 ide_complete_rq(drive, 0, 512); 777 return ide_stopped; 778 } 779 if (blk_pc_request(rq) == 0 && uptodate == 0) 780 rq->cmd_flags |= REQ_FAILED; 781 goto out_end; 782 } 783 784 ide_read_bcount_and_ireason(drive, &len, &ireason); 785 786 thislen = blk_fs_request(rq) ? len : rq->data_len; 787 if (thislen > len) 788 thislen = len; 789 790 ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d", 791 stat, thislen); 792 793 /* If DRQ is clear, the command has completed. */ 794 if ((stat & ATA_DRQ) == 0) { 795 if (blk_fs_request(rq)) { 796 /* 797 * If we're not done reading/writing, complain. 798 * Otherwise, complete the command normally. 799 */ 800 uptodate = 1; 801 if (rq->current_nr_sectors > 0) { 802 printk(KERN_ERR PFX "%s: %s: data underrun " 803 "(%d blocks)\n", 804 drive->name, __func__, 805 rq->current_nr_sectors); 806 if (!write) 807 rq->cmd_flags |= REQ_FAILED; 808 uptodate = 0; 809 } 810 cdrom_end_request(drive, uptodate); 811 return ide_stopped; 812 } else if (!blk_pc_request(rq)) { 813 ide_cd_request_sense_fixup(drive, rq); 814 /* complain if we still have data left to transfer */ 815 uptodate = rq->data_len ? 0 : 1; 816 if (uptodate == 0) 817 rq->cmd_flags |= REQ_FAILED; 818 } 819 goto out_end; 820 } 821 822 /* check which way to transfer data */ 823 if (ide_cd_check_ireason(drive, rq, len, ireason, write)) 824 return ide_stopped; 825 826 if (blk_fs_request(rq)) { 827 if (write == 0) { 828 int nskip; 829 830 if (ide_cd_check_transfer_size(drive, len)) { 831 cdrom_end_request(drive, 0); 832 return ide_stopped; 833 } 834 835 /* 836 * First, figure out if we need to bit-bucket 837 * any of the leading sectors. 838 */ 839 nskip = min_t(int, rq->current_nr_sectors 840 - bio_cur_sectors(rq->bio), 841 thislen >> 9); 842 if (nskip > 0) { 843 ide_pad_transfer(drive, write, nskip << 9); 844 rq->current_nr_sectors -= nskip; 845 thislen -= (nskip << 9); 846 } 847 } 848 } 849 850 if (ireason == 0) { 851 write = 1; 852 xferfunc = hwif->tp_ops->output_data; 853 } else { 854 write = 0; 855 xferfunc = hwif->tp_ops->input_data; 856 } 857 858 ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, " 859 "ireason: 0x%x", 860 rq->cmd_type, ireason); 861 862 /* transfer data */ 863 while (thislen > 0) { 864 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data; 865 int blen = rq->data_len; 866 867 /* bio backed? */ 868 if (rq->bio) { 869 if (blk_fs_request(rq)) { 870 ptr = rq->buffer; 871 blen = rq->current_nr_sectors << 9; 872 } else { 873 ptr = bio_data(rq->bio); 874 blen = bio_iovec(rq->bio)->bv_len; 875 } 876 } 877 878 if (!ptr) { 879 if (blk_fs_request(rq) && !write) 880 /* 881 * If the buffers are full, pipe the rest into 882 * oblivion. 883 */ 884 ide_pad_transfer(drive, 0, thislen); 885 else { 886 printk(KERN_ERR PFX "%s: confused, missing data\n", 887 drive->name); 888 blk_dump_rq_flags(rq, rq_data_dir(rq) 889 ? "cdrom_newpc_intr, write" 890 : "cdrom_newpc_intr, read"); 891 } 892 break; 893 } 894 895 if (blen > thislen) 896 blen = thislen; 897 898 xferfunc(drive, NULL, ptr, blen); 899 900 thislen -= blen; 901 len -= blen; 902 903 if (blk_fs_request(rq)) { 904 rq->buffer += blen; 905 rq->nr_sectors -= (blen >> 9); 906 rq->current_nr_sectors -= (blen >> 9); 907 rq->sector += (blen >> 9); 908 909 if (rq->current_nr_sectors == 0 && rq->nr_sectors) 910 cdrom_end_request(drive, 1); 911 } else { 912 rq->data_len -= blen; 913 914 /* 915 * The request can't be completed until DRQ is cleared. 916 * So complete the data, but don't complete the request 917 * using the dummy function for the callback feature 918 * of blk_end_request_callback(). 919 */ 920 if (rq->bio) 921 blk_end_request_callback(rq, 0, blen, 922 cdrom_newpc_intr_dummy_cb); 923 else 924 rq->data += blen; 925 } 926 if (!write && blk_sense_request(rq)) 927 rq->sense_len += blen; 928 } 929 930 /* pad, if necessary */ 931 if (!blk_fs_request(rq) && len > 0) 932 ide_pad_transfer(drive, write, len); 933 934 if (blk_pc_request(rq)) { 935 timeout = rq->timeout; 936 } else { 937 timeout = ATAPI_WAIT_PC; 938 if (!blk_fs_request(rq)) 939 expiry = ide_cd_expiry; 940 } 941 942 hwif->expiry = expiry; 943 ide_set_handler(drive, cdrom_newpc_intr, timeout); 944 return ide_started; 945 946out_end: 947 if (blk_pc_request(rq)) { 948 unsigned int dlen = rq->data_len; 949 950 if (dma) 951 rq->data_len = 0; 952 953 if (blk_end_request(rq, 0, dlen)) 954 BUG(); 955 956 hwif->rq = NULL; 957 } else { 958 cdrom_end_request(drive, uptodate); 959 } 960 return ide_stopped; 961} 962 963static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq) 964{ 965 struct cdrom_info *cd = drive->driver_data; 966 int write = rq_data_dir(rq) == WRITE; 967 unsigned short sectors_per_frame = 968 queue_hardsect_size(drive->queue) >> SECTOR_BITS; 969 970 ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, write: 0x%x, " 971 "secs_per_frame: %u", 972 rq->cmd[0], write, sectors_per_frame); 973 974 if (write) { 975 /* disk has become write protected */ 976 if (get_disk_ro(cd->disk)) 977 return ide_stopped; 978 } else { 979 /* 980 * We may be retrying this request after an error. Fix up any 981 * weirdness which might be present in the request packet. 982 */ 983 ide_cd_restore_request(drive, rq); 984 } 985 986 /* use DMA, if possible / writes *must* be hardware frame aligned */ 987 if ((rq->nr_sectors & (sectors_per_frame - 1)) || 988 (rq->sector & (sectors_per_frame - 1))) { 989 if (write) 990 return ide_stopped; 991 drive->dma = 0; 992 } else 993 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA); 994 995 if (write) 996 cd->devinfo.media_written = 1; 997 998 return ide_started; 999} 1000 1001static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq) 1002{ 1003 1004 ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x", 1005 rq->cmd[0], rq->cmd_type); 1006 1007 if (blk_pc_request(rq)) 1008 rq->cmd_flags |= REQ_QUIET; 1009 else 1010 rq->cmd_flags &= ~REQ_FAILED; 1011 1012 drive->dma = 0; 1013 1014 /* sg request */ 1015 if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) { 1016 struct request_queue *q = drive->queue; 1017 unsigned int alignment; 1018 char *buf; 1019 1020 if (rq->bio) 1021 buf = bio_data(rq->bio); 1022 else 1023 buf = rq->data; 1024 1025 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA); 1026 1027 /* 1028 * check if dma is safe 1029 * 1030 * NOTE! The "len" and "addr" checks should possibly have 1031 * separate masks. 1032 */ 1033 alignment = queue_dma_alignment(q) | q->dma_pad_mask; 1034 if ((unsigned long)buf & alignment 1035 || rq->data_len & q->dma_pad_mask 1036 || object_is_on_stack(buf)) 1037 drive->dma = 0; 1038 } 1039} 1040 1041static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq, 1042 sector_t block) 1043{ 1044 struct ide_cmd cmd; 1045 int uptodate = 0; 1046 1047 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu", 1048 rq->cmd[0], (unsigned long long)block); 1049 1050 if (drive->debug_mask & IDE_DBG_RQ) 1051 blk_dump_rq_flags(rq, "ide_cd_do_request"); 1052 1053 if (blk_fs_request(rq)) { 1054 if (cdrom_start_rw(drive, rq) == ide_stopped || 1055 ide_cd_prepare_rw_request(drive, rq) == ide_stopped) 1056 goto out_end; 1057 } else if (blk_sense_request(rq) || blk_pc_request(rq) || 1058 rq->cmd_type == REQ_TYPE_ATA_PC) { 1059 if (!rq->timeout) 1060 rq->timeout = ATAPI_WAIT_PC; 1061 1062 cdrom_do_block_pc(drive, rq); 1063 } else if (blk_special_request(rq)) { 1064 /* right now this can only be a reset... */ 1065 uptodate = 1; 1066 goto out_end; 1067 } else { 1068 blk_dump_rq_flags(rq, DRV_NAME " bad flags"); 1069 goto out_end; 1070 } 1071 1072 memset(&cmd, 0, sizeof(cmd)); 1073 1074 if (rq_data_dir(rq)) 1075 cmd.tf_flags |= IDE_TFLAG_WRITE; 1076 1077 cmd.rq = rq; 1078 1079 return ide_issue_pc(drive, &cmd); 1080out_end: 1081 cdrom_end_request(drive, uptodate); 1082 return ide_stopped; 1083} 1084 1085/* 1086 * Ioctl handling. 1087 * 1088 * Routines which queue packet commands take as a final argument a pointer to a 1089 * request_sense struct. If execution of the command results in an error with a 1090 * CHECK CONDITION status, this structure will be filled with the results of the 1091 * subsequent request sense command. The pointer can also be NULL, in which case 1092 * no sense information is returned. 1093 */ 1094static void msf_from_bcd(struct atapi_msf *msf) 1095{ 1096 msf->minute = bcd2bin(msf->minute); 1097 msf->second = bcd2bin(msf->second); 1098 msf->frame = bcd2bin(msf->frame); 1099} 1100 1101int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense) 1102{ 1103 struct cdrom_info *info = drive->driver_data; 1104 struct cdrom_device_info *cdi = &info->devinfo; 1105 unsigned char cmd[BLK_MAX_CDB]; 1106 1107 ide_debug_log(IDE_DBG_FUNC, "enter"); 1108 1109 memset(cmd, 0, BLK_MAX_CDB); 1110 cmd[0] = GPCMD_TEST_UNIT_READY; 1111 1112 /* 1113 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs 1114 * instead of supporting the LOAD_UNLOAD opcode. 1115 */ 1116 cmd[7] = cdi->sanyo_slot % 3; 1117 1118 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET); 1119} 1120 1121static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity, 1122 unsigned long *sectors_per_frame, 1123 struct request_sense *sense) 1124{ 1125 struct { 1126 __be32 lba; 1127 __be32 blocklen; 1128 } capbuf; 1129 1130 int stat; 1131 unsigned char cmd[BLK_MAX_CDB]; 1132 unsigned len = sizeof(capbuf); 1133 u32 blocklen; 1134 1135 ide_debug_log(IDE_DBG_FUNC, "enter"); 1136 1137 memset(cmd, 0, BLK_MAX_CDB); 1138 cmd[0] = GPCMD_READ_CDVD_CAPACITY; 1139 1140 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0, 1141 REQ_QUIET); 1142 if (stat) 1143 return stat; 1144 1145 /* 1146 * Sanity check the given block size 1147 */ 1148 blocklen = be32_to_cpu(capbuf.blocklen); 1149 switch (blocklen) { 1150 case 512: 1151 case 1024: 1152 case 2048: 1153 case 4096: 1154 break; 1155 default: 1156 printk(KERN_ERR PFX "%s: weird block size %u\n", 1157 drive->name, blocklen); 1158 printk(KERN_ERR PFX "%s: default to 2kb block size\n", 1159 drive->name); 1160 blocklen = 2048; 1161 break; 1162 } 1163 1164 *capacity = 1 + be32_to_cpu(capbuf.lba); 1165 *sectors_per_frame = blocklen >> SECTOR_BITS; 1166 1167 ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu", 1168 *capacity, *sectors_per_frame); 1169 1170 return 0; 1171} 1172 1173static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag, 1174 int format, char *buf, int buflen, 1175 struct request_sense *sense) 1176{ 1177 unsigned char cmd[BLK_MAX_CDB]; 1178 1179 ide_debug_log(IDE_DBG_FUNC, "enter"); 1180 1181 memset(cmd, 0, BLK_MAX_CDB); 1182 1183 cmd[0] = GPCMD_READ_TOC_PMA_ATIP; 1184 cmd[6] = trackno; 1185 cmd[7] = (buflen >> 8); 1186 cmd[8] = (buflen & 0xff); 1187 cmd[9] = (format << 6); 1188 1189 if (msf_flag) 1190 cmd[1] = 2; 1191 1192 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET); 1193} 1194 1195/* Try to read the entire TOC for the disk into our internal buffer. */ 1196int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense) 1197{ 1198 int stat, ntracks, i; 1199 struct cdrom_info *info = drive->driver_data; 1200 struct cdrom_device_info *cdi = &info->devinfo; 1201 struct atapi_toc *toc = info->toc; 1202 struct { 1203 struct atapi_toc_header hdr; 1204 struct atapi_toc_entry ent; 1205 } ms_tmp; 1206 long last_written; 1207 unsigned long sectors_per_frame = SECTORS_PER_FRAME; 1208 1209 ide_debug_log(IDE_DBG_FUNC, "enter"); 1210 1211 if (toc == NULL) { 1212 /* try to allocate space */ 1213 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL); 1214 if (toc == NULL) { 1215 printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n", 1216 drive->name); 1217 return -ENOMEM; 1218 } 1219 info->toc = toc; 1220 } 1221 1222 /* 1223 * Check to see if the existing data is still valid. If it is, 1224 * just return. 1225 */ 1226 (void) cdrom_check_status(drive, sense); 1227 1228 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID) 1229 return 0; 1230 1231 /* try to get the total cdrom capacity and sector size */ 1232 stat = cdrom_read_capacity(drive, &toc->capacity, §ors_per_frame, 1233 sense); 1234 if (stat) 1235 toc->capacity = 0x1fffff; 1236 1237 set_capacity(info->disk, toc->capacity * sectors_per_frame); 1238 /* save a private copy of the TOC capacity for error handling */ 1239 drive->probed_capacity = toc->capacity * sectors_per_frame; 1240 1241 blk_queue_hardsect_size(drive->queue, 1242 sectors_per_frame << SECTOR_BITS); 1243 1244 /* first read just the header, so we know how long the TOC is */ 1245 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr, 1246 sizeof(struct atapi_toc_header), sense); 1247 if (stat) 1248 return stat; 1249 1250 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1251 toc->hdr.first_track = bcd2bin(toc->hdr.first_track); 1252 toc->hdr.last_track = bcd2bin(toc->hdr.last_track); 1253 } 1254 1255 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1; 1256 if (ntracks <= 0) 1257 return -EIO; 1258 if (ntracks > MAX_TRACKS) 1259 ntracks = MAX_TRACKS; 1260 1261 /* now read the whole schmeer */ 1262 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0, 1263 (char *)&toc->hdr, 1264 sizeof(struct atapi_toc_header) + 1265 (ntracks + 1) * 1266 sizeof(struct atapi_toc_entry), sense); 1267 1268 if (stat && toc->hdr.first_track > 1) { 1269 /* 1270 * Cds with CDI tracks only don't have any TOC entries, despite 1271 * of this the returned values are 1272 * first_track == last_track = number of CDI tracks + 1, 1273 * so that this case is indistinguishable from the same layout 1274 * plus an additional audio track. If we get an error for the 1275 * regular case, we assume a CDI without additional audio 1276 * tracks. In this case the readable TOC is empty (CDI tracks 1277 * are not included) and only holds the Leadout entry. 1278 * 1279 * Heiko Eißfeldt. 1280 */ 1281 ntracks = 0; 1282 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0, 1283 (char *)&toc->hdr, 1284 sizeof(struct atapi_toc_header) + 1285 (ntracks + 1) * 1286 sizeof(struct atapi_toc_entry), 1287 sense); 1288 if (stat) 1289 return stat; 1290 1291 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1292 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT); 1293 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT); 1294 } else { 1295 toc->hdr.first_track = CDROM_LEADOUT; 1296 toc->hdr.last_track = CDROM_LEADOUT; 1297 } 1298 } 1299 1300 if (stat) 1301 return stat; 1302 1303 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length); 1304 1305 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1306 toc->hdr.first_track = bcd2bin(toc->hdr.first_track); 1307 toc->hdr.last_track = bcd2bin(toc->hdr.last_track); 1308 } 1309 1310 for (i = 0; i <= ntracks; i++) { 1311 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) { 1312 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) 1313 toc->ent[i].track = bcd2bin(toc->ent[i].track); 1314 msf_from_bcd(&toc->ent[i].addr.msf); 1315 } 1316 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute, 1317 toc->ent[i].addr.msf.second, 1318 toc->ent[i].addr.msf.frame); 1319 } 1320 1321 if (toc->hdr.first_track != CDROM_LEADOUT) { 1322 /* read the multisession information */ 1323 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp, 1324 sizeof(ms_tmp), sense); 1325 if (stat) 1326 return stat; 1327 1328 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba); 1329 } else { 1330 ms_tmp.hdr.last_track = CDROM_LEADOUT; 1331 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track; 1332 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */ 1333 } 1334 1335 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) { 1336 /* re-read multisession information using MSF format */ 1337 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp, 1338 sizeof(ms_tmp), sense); 1339 if (stat) 1340 return stat; 1341 1342 msf_from_bcd(&ms_tmp.ent.addr.msf); 1343 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute, 1344 ms_tmp.ent.addr.msf.second, 1345 ms_tmp.ent.addr.msf.frame); 1346 } 1347 1348 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track); 1349 1350 /* now try to get the total cdrom capacity */ 1351 stat = cdrom_get_last_written(cdi, &last_written); 1352 if (!stat && (last_written > toc->capacity)) { 1353 toc->capacity = last_written; 1354 set_capacity(info->disk, toc->capacity * sectors_per_frame); 1355 drive->probed_capacity = toc->capacity * sectors_per_frame; 1356 } 1357 1358 /* Remember that we've read this stuff. */ 1359 drive->atapi_flags |= IDE_AFLAG_TOC_VALID; 1360 1361 return 0; 1362} 1363 1364int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf) 1365{ 1366 struct cdrom_info *info = drive->driver_data; 1367 struct cdrom_device_info *cdi = &info->devinfo; 1368 struct packet_command cgc; 1369 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE; 1370 1371 ide_debug_log(IDE_DBG_FUNC, "enter"); 1372 1373 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0) 1374 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE; 1375 1376 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN); 1377 do { 1378 /* we seem to get stat=0x01,err=0x00 the first time (??) */ 1379 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0); 1380 if (!stat) 1381 break; 1382 } while (--attempts); 1383 return stat; 1384} 1385 1386void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf) 1387{ 1388 struct cdrom_info *cd = drive->driver_data; 1389 u16 curspeed, maxspeed; 1390 1391 ide_debug_log(IDE_DBG_FUNC, "enter"); 1392 1393 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) { 1394 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]); 1395 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]); 1396 } else { 1397 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]); 1398 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]); 1399 } 1400 1401 ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u", 1402 curspeed, maxspeed); 1403 1404 cd->current_speed = (curspeed + (176/2)) / 176; 1405 cd->max_speed = (maxspeed + (176/2)) / 176; 1406} 1407 1408#define IDE_CD_CAPABILITIES \ 1409 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \ 1410 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \ 1411 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \ 1412 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \ 1413 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM) 1414 1415static struct cdrom_device_ops ide_cdrom_dops = { 1416 .open = ide_cdrom_open_real, 1417 .release = ide_cdrom_release_real, 1418 .drive_status = ide_cdrom_drive_status, 1419 .media_changed = ide_cdrom_check_media_change_real, 1420 .tray_move = ide_cdrom_tray_move, 1421 .lock_door = ide_cdrom_lock_door, 1422 .select_speed = ide_cdrom_select_speed, 1423 .get_last_session = ide_cdrom_get_last_session, 1424 .get_mcn = ide_cdrom_get_mcn, 1425 .reset = ide_cdrom_reset, 1426 .audio_ioctl = ide_cdrom_audio_ioctl, 1427 .capability = IDE_CD_CAPABILITIES, 1428 .generic_packet = ide_cdrom_packet, 1429}; 1430 1431static int ide_cdrom_register(ide_drive_t *drive, int nslots) 1432{ 1433 struct cdrom_info *info = drive->driver_data; 1434 struct cdrom_device_info *devinfo = &info->devinfo; 1435 1436 ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots); 1437 1438 devinfo->ops = &ide_cdrom_dops; 1439 devinfo->speed = info->current_speed; 1440 devinfo->capacity = nslots; 1441 devinfo->handle = drive; 1442 strcpy(devinfo->name, drive->name); 1443 1444 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT) 1445 devinfo->mask |= CDC_SELECT_SPEED; 1446 1447 devinfo->disk = info->disk; 1448 return register_cdrom(devinfo); 1449} 1450 1451static int ide_cdrom_probe_capabilities(ide_drive_t *drive) 1452{ 1453 struct cdrom_info *cd = drive->driver_data; 1454 struct cdrom_device_info *cdi = &cd->devinfo; 1455 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE]; 1456 mechtype_t mechtype; 1457 int nslots = 1; 1458 1459 ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx", 1460 drive->media, drive->atapi_flags); 1461 1462 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R | 1463 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO | 1464 CDC_MO_DRIVE | CDC_RAM); 1465 1466 if (drive->media == ide_optical) { 1467 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM); 1468 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n", 1469 drive->name); 1470 return nslots; 1471 } 1472 1473 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) { 1474 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT; 1475 cdi->mask &= ~CDC_PLAY_AUDIO; 1476 return nslots; 1477 } 1478 1479 /* 1480 * We have to cheat a little here. the packet will eventually be queued 1481 * with ide_cdrom_packet(), which extracts the drive from cdi->handle. 1482 * Since this device hasn't been registered with the Uniform layer yet, 1483 * it can't do this. Same goes for cdi->ops. 1484 */ 1485 cdi->handle = drive; 1486 cdi->ops = &ide_cdrom_dops; 1487 1488 if (ide_cdrom_get_capabilities(drive, buf)) 1489 return 0; 1490 1491 if ((buf[8 + 6] & 0x01) == 0) 1492 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING; 1493 if (buf[8 + 6] & 0x08) 1494 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT; 1495 if (buf[8 + 3] & 0x01) 1496 cdi->mask &= ~CDC_CD_R; 1497 if (buf[8 + 3] & 0x02) 1498 cdi->mask &= ~(CDC_CD_RW | CDC_RAM); 1499 if (buf[8 + 2] & 0x38) 1500 cdi->mask &= ~CDC_DVD; 1501 if (buf[8 + 3] & 0x20) 1502 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM); 1503 if (buf[8 + 3] & 0x10) 1504 cdi->mask &= ~CDC_DVD_R; 1505 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK)) 1506 cdi->mask &= ~CDC_PLAY_AUDIO; 1507 1508 mechtype = buf[8 + 6] >> 5; 1509 if (mechtype == mechtype_caddy || 1510 mechtype == mechtype_popup || 1511 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE)) 1512 cdi->mask |= CDC_CLOSE_TRAY; 1513 1514 if (cdi->sanyo_slot > 0) { 1515 cdi->mask &= ~CDC_SELECT_DISC; 1516 nslots = 3; 1517 } else if (mechtype == mechtype_individual_changer || 1518 mechtype == mechtype_cartridge_changer) { 1519 nslots = cdrom_number_of_slots(cdi); 1520 if (nslots > 1) 1521 cdi->mask &= ~CDC_SELECT_DISC; 1522 } 1523 1524 ide_cdrom_update_speed(drive, buf); 1525 1526 printk(KERN_INFO PFX "%s: ATAPI", drive->name); 1527 1528 /* don't print speed if the drive reported 0 */ 1529 if (cd->max_speed) 1530 printk(KERN_CONT " %dX", cd->max_speed); 1531 1532 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM"); 1533 1534 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0) 1535 printk(KERN_CONT " DVD%s%s", 1536 (cdi->mask & CDC_DVD_R) ? "" : "-R", 1537 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM"); 1538 1539 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0) 1540 printk(KERN_CONT " CD%s%s", 1541 (cdi->mask & CDC_CD_R) ? "" : "-R", 1542 (cdi->mask & CDC_CD_RW) ? "" : "/RW"); 1543 1544 if ((cdi->mask & CDC_SELECT_DISC) == 0) 1545 printk(KERN_CONT " changer w/%d slots", nslots); 1546 else 1547 printk(KERN_CONT " drive"); 1548 1549 printk(KERN_CONT ", %dkB Cache\n", 1550 be16_to_cpup((__be16 *)&buf[8 + 12])); 1551 1552 return nslots; 1553} 1554 1555/* standard prep_rq_fn that builds 10 byte cmds */ 1556static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq) 1557{ 1558 int hard_sect = queue_hardsect_size(q); 1559 long block = (long)rq->hard_sector / (hard_sect >> 9); 1560 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9); 1561 1562 memset(rq->cmd, 0, BLK_MAX_CDB); 1563 1564 if (rq_data_dir(rq) == READ) 1565 rq->cmd[0] = GPCMD_READ_10; 1566 else 1567 rq->cmd[0] = GPCMD_WRITE_10; 1568 1569 /* 1570 * fill in lba 1571 */ 1572 rq->cmd[2] = (block >> 24) & 0xff; 1573 rq->cmd[3] = (block >> 16) & 0xff; 1574 rq->cmd[4] = (block >> 8) & 0xff; 1575 rq->cmd[5] = block & 0xff; 1576 1577 /* 1578 * and transfer length 1579 */ 1580 rq->cmd[7] = (blocks >> 8) & 0xff; 1581 rq->cmd[8] = blocks & 0xff; 1582 rq->cmd_len = 10; 1583 return BLKPREP_OK; 1584} 1585 1586/* 1587 * Most of the SCSI commands are supported directly by ATAPI devices. 1588 * This transform handles the few exceptions. 1589 */ 1590static int ide_cdrom_prep_pc(struct request *rq) 1591{ 1592 u8 *c = rq->cmd; 1593 1594 /* transform 6-byte read/write commands to the 10-byte version */ 1595 if (c[0] == READ_6 || c[0] == WRITE_6) { 1596 c[8] = c[4]; 1597 c[5] = c[3]; 1598 c[4] = c[2]; 1599 c[3] = c[1] & 0x1f; 1600 c[2] = 0; 1601 c[1] &= 0xe0; 1602 c[0] += (READ_10 - READ_6); 1603 rq->cmd_len = 10; 1604 return BLKPREP_OK; 1605 } 1606 1607 /* 1608 * it's silly to pretend we understand 6-byte sense commands, just 1609 * reject with ILLEGAL_REQUEST and the caller should take the 1610 * appropriate action 1611 */ 1612 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) { 1613 rq->errors = ILLEGAL_REQUEST; 1614 return BLKPREP_KILL; 1615 } 1616 1617 return BLKPREP_OK; 1618} 1619 1620static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq) 1621{ 1622 if (blk_fs_request(rq)) 1623 return ide_cdrom_prep_fs(q, rq); 1624 else if (blk_pc_request(rq)) 1625 return ide_cdrom_prep_pc(rq); 1626 1627 return 0; 1628} 1629 1630struct cd_list_entry { 1631 const char *id_model; 1632 const char *id_firmware; 1633 unsigned int cd_flags; 1634}; 1635 1636#ifdef CONFIG_IDE_PROC_FS 1637static sector_t ide_cdrom_capacity(ide_drive_t *drive) 1638{ 1639 unsigned long capacity, sectors_per_frame; 1640 1641 if (cdrom_read_capacity(drive, &capacity, §ors_per_frame, NULL)) 1642 return 0; 1643 1644 return capacity * sectors_per_frame; 1645} 1646 1647static int proc_idecd_read_capacity(char *page, char **start, off_t off, 1648 int count, int *eof, void *data) 1649{ 1650 ide_drive_t *drive = data; 1651 int len; 1652 1653 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive)); 1654 PROC_IDE_READ_RETURN(page, start, off, count, eof, len); 1655} 1656 1657static ide_proc_entry_t idecd_proc[] = { 1658 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL }, 1659 { NULL, 0, NULL, NULL } 1660}; 1661 1662static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive) 1663{ 1664 return idecd_proc; 1665} 1666 1667static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive) 1668{ 1669 return NULL; 1670} 1671#endif 1672 1673static const struct cd_list_entry ide_cd_quirks_list[] = { 1674 /* Limit transfer size per interrupt. */ 1675 { "SAMSUNG CD-ROM SCR-2430", NULL, IDE_AFLAG_LIMIT_NFRAMES }, 1676 { "SAMSUNG CD-ROM SCR-2432", NULL, IDE_AFLAG_LIMIT_NFRAMES }, 1677 /* SCR-3231 doesn't support the SET_CD_SPEED command. */ 1678 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT }, 1679 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */ 1680 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD | 1681 IDE_AFLAG_PRE_ATAPI12, }, 1682 /* Vertos 300, some versions of this drive like to talk BCD. */ 1683 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, }, 1684 /* Vertos 600 ESD. */ 1685 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, }, 1686 /* 1687 * Sanyo 3 CD changer uses a non-standard command for CD changing 1688 * (by default standard ATAPI support for CD changers is used). 1689 */ 1690 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD }, 1691 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD }, 1692 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD }, 1693 /* Stingray 8X CD-ROM. */ 1694 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 }, 1695 /* 1696 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length 1697 * mode sense page capabilities size, but older drives break. 1698 */ 1699 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE }, 1700 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE }, 1701 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */ 1702 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS }, 1703 /* 1704 * Some drives used by Apple don't advertise audio play 1705 * but they do support reading TOC & audio datas. 1706 */ 1707 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1708 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1709 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1710 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1711 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1712 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1713 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE }, 1714 { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE }, 1715 { NULL, NULL, 0 } 1716}; 1717 1718static unsigned int ide_cd_flags(u16 *id) 1719{ 1720 const struct cd_list_entry *cle = ide_cd_quirks_list; 1721 1722 while (cle->id_model) { 1723 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 && 1724 (cle->id_firmware == NULL || 1725 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware))) 1726 return cle->cd_flags; 1727 cle++; 1728 } 1729 1730 return 0; 1731} 1732 1733static int ide_cdrom_setup(ide_drive_t *drive) 1734{ 1735 struct cdrom_info *cd = drive->driver_data; 1736 struct cdrom_device_info *cdi = &cd->devinfo; 1737 u16 *id = drive->id; 1738 char *fw_rev = (char *)&id[ATA_ID_FW_REV]; 1739 int nslots; 1740 1741 ide_debug_log(IDE_DBG_PROBE, "enter"); 1742 1743 blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn); 1744 blk_queue_dma_alignment(drive->queue, 31); 1745 blk_queue_update_dma_pad(drive->queue, 15); 1746 drive->queue->unplug_delay = (1 * HZ) / 1000; 1747 if (!drive->queue->unplug_delay) 1748 drive->queue->unplug_delay = 1; 1749 1750 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED; 1751 drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id); 1752 1753 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) && 1754 fw_rev[4] == '1' && fw_rev[6] <= '2') 1755 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD | 1756 IDE_AFLAG_TOCADDR_AS_BCD); 1757 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) && 1758 fw_rev[4] == '1' && fw_rev[6] <= '2') 1759 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD; 1760 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD) 1761 /* 3 => use CD in slot 0 */ 1762 cdi->sanyo_slot = 3; 1763 1764 nslots = ide_cdrom_probe_capabilities(drive); 1765 1766 /* set correct block size */ 1767 blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE); 1768 1769 if (ide_cdrom_register(drive, nslots)) { 1770 printk(KERN_ERR PFX "%s: %s failed to register device with the" 1771 " cdrom driver.\n", drive->name, __func__); 1772 cd->devinfo.handle = NULL; 1773 return 1; 1774 } 1775 1776 ide_proc_register_driver(drive, cd->driver); 1777 return 0; 1778} 1779 1780static void ide_cd_remove(ide_drive_t *drive) 1781{ 1782 struct cdrom_info *info = drive->driver_data; 1783 1784 ide_debug_log(IDE_DBG_FUNC, "enter"); 1785 1786 ide_proc_unregister_driver(drive, info->driver); 1787 device_del(&info->dev); 1788 del_gendisk(info->disk); 1789 1790 mutex_lock(&idecd_ref_mutex); 1791 put_device(&info->dev); 1792 mutex_unlock(&idecd_ref_mutex); 1793} 1794 1795static void ide_cd_release(struct device *dev) 1796{ 1797 struct cdrom_info *info = to_ide_drv(dev, cdrom_info); 1798 struct cdrom_device_info *devinfo = &info->devinfo; 1799 ide_drive_t *drive = info->drive; 1800 struct gendisk *g = info->disk; 1801 1802 ide_debug_log(IDE_DBG_FUNC, "enter"); 1803 1804 kfree(info->toc); 1805 if (devinfo->handle == drive) 1806 unregister_cdrom(devinfo); 1807 drive->driver_data = NULL; 1808 blk_queue_prep_rq(drive->queue, NULL); 1809 g->private_data = NULL; 1810 put_disk(g); 1811 kfree(info); 1812} 1813 1814static int ide_cd_probe(ide_drive_t *); 1815 1816static struct ide_driver ide_cdrom_driver = { 1817 .gen_driver = { 1818 .owner = THIS_MODULE, 1819 .name = "ide-cdrom", 1820 .bus = &ide_bus_type, 1821 }, 1822 .probe = ide_cd_probe, 1823 .remove = ide_cd_remove, 1824 .version = IDECD_VERSION, 1825 .do_request = ide_cd_do_request, 1826#ifdef CONFIG_IDE_PROC_FS 1827 .proc_entries = ide_cd_proc_entries, 1828 .proc_devsets = ide_cd_proc_devsets, 1829#endif 1830}; 1831 1832static int idecd_open(struct block_device *bdev, fmode_t mode) 1833{ 1834 struct cdrom_info *info = ide_cd_get(bdev->bd_disk); 1835 int rc = -ENOMEM; 1836 1837 if (!info) 1838 return -ENXIO; 1839 1840 rc = cdrom_open(&info->devinfo, bdev, mode); 1841 1842 if (rc < 0) 1843 ide_cd_put(info); 1844 1845 return rc; 1846} 1847 1848static int idecd_release(struct gendisk *disk, fmode_t mode) 1849{ 1850 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 1851 1852 cdrom_release(&info->devinfo, mode); 1853 1854 ide_cd_put(info); 1855 1856 return 0; 1857} 1858 1859static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg) 1860{ 1861 struct packet_command cgc; 1862 char buffer[16]; 1863 int stat; 1864 char spindown; 1865 1866 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char))) 1867 return -EFAULT; 1868 1869 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN); 1870 1871 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0); 1872 if (stat) 1873 return stat; 1874 1875 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f); 1876 return cdrom_mode_select(cdi, &cgc); 1877} 1878 1879static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg) 1880{ 1881 struct packet_command cgc; 1882 char buffer[16]; 1883 int stat; 1884 char spindown; 1885 1886 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN); 1887 1888 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0); 1889 if (stat) 1890 return stat; 1891 1892 spindown = buffer[11] & 0x0f; 1893 if (copy_to_user((void __user *)arg, &spindown, sizeof(char))) 1894 return -EFAULT; 1895 return 0; 1896} 1897 1898static int idecd_ioctl(struct block_device *bdev, fmode_t mode, 1899 unsigned int cmd, unsigned long arg) 1900{ 1901 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info); 1902 int err; 1903 1904 switch (cmd) { 1905 case CDROMSETSPINDOWN: 1906 return idecd_set_spindown(&info->devinfo, arg); 1907 case CDROMGETSPINDOWN: 1908 return idecd_get_spindown(&info->devinfo, arg); 1909 default: 1910 break; 1911 } 1912 1913 err = generic_ide_ioctl(info->drive, bdev, cmd, arg); 1914 if (err == -EINVAL) 1915 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg); 1916 1917 return err; 1918} 1919 1920static int idecd_media_changed(struct gendisk *disk) 1921{ 1922 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 1923 return cdrom_media_changed(&info->devinfo); 1924} 1925 1926static int idecd_revalidate_disk(struct gendisk *disk) 1927{ 1928 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 1929 struct request_sense sense; 1930 1931 ide_cd_read_toc(info->drive, &sense); 1932 1933 return 0; 1934} 1935 1936static struct block_device_operations idecd_ops = { 1937 .owner = THIS_MODULE, 1938 .open = idecd_open, 1939 .release = idecd_release, 1940 .locked_ioctl = idecd_ioctl, 1941 .media_changed = idecd_media_changed, 1942 .revalidate_disk = idecd_revalidate_disk 1943}; 1944 1945/* module options */ 1946static unsigned long debug_mask; 1947module_param(debug_mask, ulong, 0644); 1948 1949MODULE_DESCRIPTION("ATAPI CD-ROM Driver"); 1950 1951static int ide_cd_probe(ide_drive_t *drive) 1952{ 1953 struct cdrom_info *info; 1954 struct gendisk *g; 1955 struct request_sense sense; 1956 1957 ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x", 1958 drive->driver_req, drive->media); 1959 1960 if (!strstr("ide-cdrom", drive->driver_req)) 1961 goto failed; 1962 1963 if (drive->media != ide_cdrom && drive->media != ide_optical) 1964 goto failed; 1965 1966 drive->debug_mask = debug_mask; 1967 drive->irq_handler = cdrom_newpc_intr; 1968 1969 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL); 1970 if (info == NULL) { 1971 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n", 1972 drive->name); 1973 goto failed; 1974 } 1975 1976 g = alloc_disk(1 << PARTN_BITS); 1977 if (!g) 1978 goto out_free_cd; 1979 1980 ide_init_disk(g, drive); 1981 1982 info->dev.parent = &drive->gendev; 1983 info->dev.release = ide_cd_release; 1984 dev_set_name(&info->dev, dev_name(&drive->gendev)); 1985 1986 if (device_register(&info->dev)) 1987 goto out_free_disk; 1988 1989 info->drive = drive; 1990 info->driver = &ide_cdrom_driver; 1991 info->disk = g; 1992 1993 g->private_data = &info->driver; 1994 1995 drive->driver_data = info; 1996 1997 g->minors = 1; 1998 g->driverfs_dev = &drive->gendev; 1999 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE; 2000 if (ide_cdrom_setup(drive)) { 2001 put_device(&info->dev); 2002 goto failed; 2003 } 2004 2005 ide_cd_read_toc(drive, &sense); 2006 g->fops = &idecd_ops; 2007 g->flags |= GENHD_FL_REMOVABLE; 2008 add_disk(g); 2009 return 0; 2010 2011out_free_disk: 2012 put_disk(g); 2013out_free_cd: 2014 kfree(info); 2015failed: 2016 return -ENODEV; 2017} 2018 2019static void __exit ide_cdrom_exit(void) 2020{ 2021 driver_unregister(&ide_cdrom_driver.gen_driver); 2022} 2023 2024static int __init ide_cdrom_init(void) 2025{ 2026 printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n"); 2027 return driver_register(&ide_cdrom_driver.gen_driver); 2028} 2029 2030MODULE_ALIAS("ide:*m-cdrom*"); 2031MODULE_ALIAS("ide-cd"); 2032module_init(ide_cdrom_init); 2033module_exit(ide_cdrom_exit); 2034MODULE_LICENSE("GPL"); 2035