ide-cd.c revision 89f78b3261f7e331e41753ea2459fbb9b60a6f7a
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 * For those wishing to work on this driver, please be sure you download 16 * and comply with the latest Mt. Fuji (SFF8090 version 4) and ATAPI 17 * (SFF-8020i rev 2.6) standards. These documents can be obtained by 18 * anonymous ftp from: 19 * ftp://fission.dt.wdc.com/pub/standards/SFF_atapi/spec/SFF8020-r2.6/PS/8020r26.ps 20 * ftp://ftp.avc-pioneer.com/Mtfuji4/Spec/Fuji4r10.pdf 21 * 22 * For historical changelog please see: 23 * Documentation/ide/ChangeLog.ide-cd.1994-2004 24 */ 25 26#define DRV_NAME "ide-cd" 27#define PFX DRV_NAME ": " 28 29#define IDECD_VERSION "5.00" 30 31#include <linux/module.h> 32#include <linux/types.h> 33#include <linux/kernel.h> 34#include <linux/delay.h> 35#include <linux/timer.h> 36#include <linux/slab.h> 37#include <linux/interrupt.h> 38#include <linux/errno.h> 39#include <linux/cdrom.h> 40#include <linux/ide.h> 41#include <linux/completion.h> 42#include <linux/mutex.h> 43#include <linux/bcd.h> 44 45/* For SCSI -> ATAPI command conversion */ 46#include <scsi/scsi.h> 47 48#include <linux/irq.h> 49#include <linux/io.h> 50#include <asm/byteorder.h> 51#include <linux/uaccess.h> 52#include <asm/unaligned.h> 53 54#include "ide-cd.h" 55 56static DEFINE_MUTEX(idecd_ref_mutex); 57 58static void ide_cd_release(struct device *); 59 60static struct cdrom_info *ide_cd_get(struct gendisk *disk) 61{ 62 struct cdrom_info *cd = NULL; 63 64 mutex_lock(&idecd_ref_mutex); 65 cd = ide_drv_g(disk, cdrom_info); 66 if (cd) { 67 if (ide_device_get(cd->drive)) 68 cd = NULL; 69 else 70 get_device(&cd->dev); 71 72 } 73 mutex_unlock(&idecd_ref_mutex); 74 return cd; 75} 76 77static void ide_cd_put(struct cdrom_info *cd) 78{ 79 ide_drive_t *drive = cd->drive; 80 81 mutex_lock(&idecd_ref_mutex); 82 put_device(&cd->dev); 83 ide_device_put(drive); 84 mutex_unlock(&idecd_ref_mutex); 85} 86 87/* 88 * Generic packet command support and error handling routines. 89 */ 90 91/* Mark that we've seen a media change and invalidate our internal buffers. */ 92static void cdrom_saw_media_change(ide_drive_t *drive) 93{ 94 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED; 95 drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID; 96} 97 98static int cdrom_log_sense(ide_drive_t *drive, struct request *rq, 99 struct request_sense *sense) 100{ 101 int log = 0; 102 103 ide_debug_log(IDE_DBG_SENSE, "sense_key: 0x%x", sense->sense_key); 104 105 if (!sense || !rq || (rq->cmd_flags & REQ_QUIET)) 106 return 0; 107 108 switch (sense->sense_key) { 109 case NO_SENSE: 110 case RECOVERED_ERROR: 111 break; 112 case NOT_READY: 113 /* 114 * don't care about tray state messages for e.g. capacity 115 * commands or in-progress or becoming ready 116 */ 117 if (sense->asc == 0x3a || sense->asc == 0x04) 118 break; 119 log = 1; 120 break; 121 case ILLEGAL_REQUEST: 122 /* 123 * don't log START_STOP unit with LoEj set, since we cannot 124 * reliably check if drive can auto-close 125 */ 126 if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24) 127 break; 128 log = 1; 129 break; 130 case UNIT_ATTENTION: 131 /* 132 * Make good and sure we've seen this potential media change. 133 * Some drives (i.e. Creative) fail to present the correct sense 134 * key in the error register. 135 */ 136 cdrom_saw_media_change(drive); 137 break; 138 default: 139 log = 1; 140 break; 141 } 142 return log; 143} 144 145static void cdrom_analyze_sense_data(ide_drive_t *drive, 146 struct request *failed_command, 147 struct request_sense *sense) 148{ 149 unsigned long sector; 150 unsigned long bio_sectors; 151 struct cdrom_info *info = drive->driver_data; 152 153 ide_debug_log(IDE_DBG_SENSE, "error_code: 0x%x, sense_key: 0x%x", 154 sense->error_code, sense->sense_key); 155 156 if (failed_command) 157 ide_debug_log(IDE_DBG_SENSE, "failed cmd: 0x%x", 158 failed_command->cmd[0]); 159 160 if (!cdrom_log_sense(drive, failed_command, sense)) 161 return; 162 163 /* 164 * If a read toc is executed for a CD-R or CD-RW medium where the first 165 * toc has not been recorded yet, it will fail with 05/24/00 (which is a 166 * confusing error) 167 */ 168 if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP) 169 if (sense->sense_key == 0x05 && sense->asc == 0x24) 170 return; 171 172 /* current error */ 173 if (sense->error_code == 0x70) { 174 switch (sense->sense_key) { 175 case MEDIUM_ERROR: 176 case VOLUME_OVERFLOW: 177 case ILLEGAL_REQUEST: 178 if (!sense->valid) 179 break; 180 if (failed_command == NULL || 181 !blk_fs_request(failed_command)) 182 break; 183 sector = (sense->information[0] << 24) | 184 (sense->information[1] << 16) | 185 (sense->information[2] << 8) | 186 (sense->information[3]); 187 188 if (drive->queue->hardsect_size == 2048) 189 /* device sector size is 2K */ 190 sector <<= 2; 191 192 bio_sectors = max(bio_sectors(failed_command->bio), 4U); 193 sector &= ~(bio_sectors - 1); 194 195 /* 196 * The SCSI specification allows for the value 197 * returned by READ CAPACITY to be up to 75 2K 198 * sectors past the last readable block. 199 * Therefore, if we hit a medium error within the 200 * last 75 2K sectors, we decrease the saved size 201 * value. 202 */ 203 if (sector < get_capacity(info->disk) && 204 drive->probed_capacity - sector < 4 * 75) 205 set_capacity(info->disk, sector); 206 } 207 } 208 209 ide_cd_log_error(drive->name, failed_command, sense); 210} 211 212static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense, 213 struct request *failed_command) 214{ 215 struct cdrom_info *info = drive->driver_data; 216 struct request *rq = &drive->request_sense_rq; 217 218 ide_debug_log(IDE_DBG_SENSE, "enter"); 219 220 if (sense == NULL) 221 sense = &info->sense_data; 222 223 /* stuff the sense request in front of our current request */ 224 blk_rq_init(NULL, rq); 225 rq->cmd_type = REQ_TYPE_ATA_PC; 226 rq->rq_disk = info->disk; 227 228 rq->data = sense; 229 rq->cmd[0] = GPCMD_REQUEST_SENSE; 230 rq->cmd[4] = 18; 231 rq->data_len = 18; 232 233 rq->cmd_type = REQ_TYPE_SENSE; 234 rq->cmd_flags |= REQ_PREEMPT; 235 236 /* NOTE! Save the failed command in "rq->buffer" */ 237 rq->buffer = (void *) failed_command; 238 239 if (failed_command) 240 ide_debug_log(IDE_DBG_SENSE, "failed_cmd: 0x%x", 241 failed_command->cmd[0]); 242 243 drive->hwif->rq = NULL; 244 245 elv_add_request(drive->queue, rq, ELEVATOR_INSERT_FRONT, 0); 246} 247 248static void cdrom_end_request(ide_drive_t *drive, int uptodate) 249{ 250 struct request *rq = drive->hwif->rq; 251 int nsectors = rq->hard_cur_sectors; 252 253 ide_debug_log(IDE_DBG_FUNC, "cmd: 0x%x, uptodate: 0x%x, nsectors: %d", 254 rq->cmd[0], uptodate, nsectors); 255 256 if (blk_sense_request(rq) && uptodate) { 257 /* 258 * For REQ_TYPE_SENSE, "rq->buffer" points to the original 259 * failed request 260 */ 261 struct request *failed = (struct request *) rq->buffer; 262 struct cdrom_info *info = drive->driver_data; 263 void *sense = &info->sense_data; 264 265 if (failed) { 266 if (failed->sense) { 267 sense = failed->sense; 268 failed->sense_len = rq->sense_len; 269 } 270 cdrom_analyze_sense_data(drive, failed, sense); 271 /* 272 * now end the failed request 273 */ 274 if (blk_fs_request(failed)) { 275 if (ide_end_rq(drive, failed, -EIO, 276 failed->hard_nr_sectors << 9)) 277 BUG(); 278 } else { 279 if (blk_end_request(failed, -EIO, 280 failed->data_len)) 281 BUG(); 282 } 283 } else 284 cdrom_analyze_sense_data(drive, NULL, sense); 285 } 286 287 if (!rq->current_nr_sectors && blk_fs_request(rq)) 288 uptodate = 1; 289 /* make sure it's fully ended */ 290 if (blk_pc_request(rq)) 291 nsectors = (rq->data_len + 511) >> 9; 292 if (!nsectors) 293 nsectors = 1; 294 295 ide_debug_log(IDE_DBG_FUNC, "uptodate: 0x%x, nsectors: %d", 296 uptodate, nsectors); 297 298 if (blk_fs_request(rq) == 0 && uptodate <= 0 && rq->errors == 0) 299 rq->errors = -EIO; 300 301 ide_end_request(drive, uptodate, nsectors); 302} 303 304static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 st) 305{ 306 if (st & 0x80) 307 return; 308 ide_dump_status(drive, msg, st); 309} 310 311/* 312 * Returns: 313 * 0: if the request should be continued. 314 * 1: if the request was ended. 315 */ 316static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret) 317{ 318 ide_hwif_t *hwif = drive->hwif; 319 struct request *rq = hwif->rq; 320 int stat, err, sense_key; 321 322 /* check for errors */ 323 stat = hwif->tp_ops->read_status(hwif); 324 325 if (stat_ret) 326 *stat_ret = stat; 327 328 if (OK_STAT(stat, good_stat, BAD_R_STAT)) 329 return 0; 330 331 /* get the IDE error register */ 332 err = ide_read_error(drive); 333 sense_key = err >> 4; 334 335 if (rq == NULL) { 336 printk(KERN_ERR PFX "%s: missing rq in %s\n", 337 drive->name, __func__); 338 return 1; 339 } 340 341 ide_debug_log(IDE_DBG_RQ, "stat: 0x%x, good_stat: 0x%x, cmd[0]: 0x%x, " 342 "rq->cmd_type: 0x%x, err: 0x%x", 343 stat, good_stat, rq->cmd[0], rq->cmd_type, 344 err); 345 346 if (blk_sense_request(rq)) { 347 /* 348 * We got an error trying to get sense info from the drive 349 * (probably while trying to recover from a former error). 350 * Just give up. 351 */ 352 rq->cmd_flags |= REQ_FAILED; 353 cdrom_end_request(drive, 0); 354 ide_error(drive, "request sense failure", stat); 355 return 1; 356 357 } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) { 358 /* All other functions, except for READ. */ 359 360 /* 361 * if we have an error, pass back CHECK_CONDITION as the 362 * scsi status byte 363 */ 364 if (blk_pc_request(rq) && !rq->errors) 365 rq->errors = SAM_STAT_CHECK_CONDITION; 366 367 /* check for tray open */ 368 if (sense_key == NOT_READY) { 369 cdrom_saw_media_change(drive); 370 } else if (sense_key == UNIT_ATTENTION) { 371 /* check for media change */ 372 cdrom_saw_media_change(drive); 373 return 0; 374 } else if (sense_key == ILLEGAL_REQUEST && 375 rq->cmd[0] == GPCMD_START_STOP_UNIT) { 376 /* 377 * Don't print error message for this condition-- 378 * SFF8090i indicates that 5/24/00 is the correct 379 * response to a request to close the tray if the 380 * drive doesn't have that capability. 381 * cdrom_log_sense() knows this! 382 */ 383 } else if (!(rq->cmd_flags & REQ_QUIET)) { 384 /* otherwise, print an error */ 385 ide_dump_status(drive, "packet command error", stat); 386 } 387 388 rq->cmd_flags |= REQ_FAILED; 389 390 /* 391 * instead of playing games with moving completions around, 392 * remove failed request completely and end it when the 393 * request sense has completed 394 */ 395 goto end_request; 396 397 } else if (blk_fs_request(rq)) { 398 int do_end_request = 0; 399 400 /* handle errors from READ and WRITE requests */ 401 402 if (blk_noretry_request(rq)) 403 do_end_request = 1; 404 405 if (sense_key == NOT_READY) { 406 /* tray open */ 407 if (rq_data_dir(rq) == READ) { 408 cdrom_saw_media_change(drive); 409 410 /* fail the request */ 411 printk(KERN_ERR PFX "%s: tray open\n", 412 drive->name); 413 do_end_request = 1; 414 } else { 415 struct cdrom_info *info = drive->driver_data; 416 417 /* 418 * Allow the drive 5 seconds to recover, some 419 * devices will return this error while flushing 420 * data from cache. 421 */ 422 if (!rq->errors) 423 info->write_timeout = jiffies + 424 ATAPI_WAIT_WRITE_BUSY; 425 rq->errors = 1; 426 if (time_after(jiffies, info->write_timeout)) 427 do_end_request = 1; 428 else { 429 struct request_queue *q = drive->queue; 430 unsigned long flags; 431 432 /* 433 * take a breather relying on the unplug 434 * timer to kick us again 435 */ 436 spin_lock_irqsave(q->queue_lock, flags); 437 blk_plug_device(q); 438 spin_unlock_irqrestore(q->queue_lock, flags); 439 440 return 1; 441 } 442 } 443 } else if (sense_key == UNIT_ATTENTION) { 444 /* media change */ 445 cdrom_saw_media_change(drive); 446 447 /* 448 * Arrange to retry the request but be sure to give up 449 * if we've retried too many times. 450 */ 451 if (++rq->errors > ERROR_MAX) 452 do_end_request = 1; 453 } else if (sense_key == ILLEGAL_REQUEST || 454 sense_key == DATA_PROTECT) { 455 /* 456 * No point in retrying after an illegal request or data 457 * protect error. 458 */ 459 ide_dump_status_no_sense(drive, "command error", stat); 460 do_end_request = 1; 461 } else if (sense_key == MEDIUM_ERROR) { 462 /* 463 * No point in re-trying a zillion times on a bad 464 * sector. If we got here the error is not correctable. 465 */ 466 ide_dump_status_no_sense(drive, 467 "media error (bad sector)", 468 stat); 469 do_end_request = 1; 470 } else if (sense_key == BLANK_CHECK) { 471 /* disk appears blank ?? */ 472 ide_dump_status_no_sense(drive, "media error (blank)", 473 stat); 474 do_end_request = 1; 475 } else if ((err & ~ATA_ABORTED) != 0) { 476 /* go to the default handler for other errors */ 477 ide_error(drive, "cdrom_decode_status", stat); 478 return 1; 479 } else if ((++rq->errors > ERROR_MAX)) { 480 /* we've racked up too many retries, abort */ 481 do_end_request = 1; 482 } 483 484 /* 485 * End a request through request sense analysis when we have 486 * sense data. We need this in order to perform end of media 487 * processing. 488 */ 489 if (do_end_request) 490 goto end_request; 491 492 /* 493 * If we got a CHECK_CONDITION status, queue 494 * a request sense command. 495 */ 496 if (stat & ATA_ERR) 497 cdrom_queue_request_sense(drive, NULL, NULL); 498 } else { 499 blk_dump_rq_flags(rq, PFX "bad rq"); 500 cdrom_end_request(drive, 0); 501 } 502 503 /* retry, or handle the next request */ 504 return 1; 505 506end_request: 507 if (stat & ATA_ERR) { 508 struct request_queue *q = drive->queue; 509 unsigned long flags; 510 511 spin_lock_irqsave(q->queue_lock, flags); 512 blkdev_dequeue_request(rq); 513 spin_unlock_irqrestore(q->queue_lock, flags); 514 515 hwif->rq = NULL; 516 517 cdrom_queue_request_sense(drive, rq->sense, rq); 518 } else 519 cdrom_end_request(drive, 0); 520 521 return 1; 522} 523 524/* 525 * Check the contents of the interrupt reason register from the cdrom 526 * and attempt to recover if there are problems. Returns 0 if everything's 527 * ok; nonzero if the request has been terminated. 528 */ 529static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq, 530 int len, int ireason, int rw) 531{ 532 ide_hwif_t *hwif = drive->hwif; 533 534 ide_debug_log(IDE_DBG_FUNC, "ireason: 0x%x, rw: 0x%x", ireason, rw); 535 536 /* 537 * ireason == 0: the drive wants to receive data from us 538 * ireason == 2: the drive is expecting to transfer data to us 539 */ 540 if (ireason == (!rw << 1)) 541 return 0; 542 else if (ireason == (rw << 1)) { 543 544 /* whoops... */ 545 printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n", 546 drive->name, __func__); 547 548 ide_pad_transfer(drive, rw, len); 549 } else if (rw == 0 && ireason == 1) { 550 /* 551 * Some drives (ASUS) seem to tell us that status info is 552 * available. Just get it and ignore. 553 */ 554 (void)hwif->tp_ops->read_status(hwif); 555 return 0; 556 } else { 557 /* drive wants a command packet, or invalid ireason... */ 558 printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n", 559 drive->name, __func__, ireason); 560 } 561 562 if (rq->cmd_type == REQ_TYPE_ATA_PC) 563 rq->cmd_flags |= REQ_FAILED; 564 565 cdrom_end_request(drive, 0); 566 return -1; 567} 568 569/* 570 * Assume that the drive will always provide data in multiples of at least 571 * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise. 572 */ 573static int ide_cd_check_transfer_size(ide_drive_t *drive, int len) 574{ 575 ide_debug_log(IDE_DBG_FUNC, "len: %d", len); 576 577 if ((len % SECTOR_SIZE) == 0) 578 return 0; 579 580 printk(KERN_ERR PFX "%s: %s: Bad transfer size %d\n", drive->name, 581 __func__, len); 582 583 if (drive->atapi_flags & IDE_AFLAG_LIMIT_NFRAMES) 584 printk(KERN_ERR PFX "This drive is not supported by this " 585 "version of the driver\n"); 586 else { 587 printk(KERN_ERR PFX "Trying to limit transfer sizes\n"); 588 drive->atapi_flags |= IDE_AFLAG_LIMIT_NFRAMES; 589 } 590 591 return 1; 592} 593 594static ide_startstop_t ide_cd_prepare_rw_request(ide_drive_t *drive, 595 struct request *rq) 596{ 597 ide_debug_log(IDE_DBG_RQ, "rq->cmd_flags: 0x%x", rq->cmd_flags); 598 599 if (rq_data_dir(rq) == READ) { 600 unsigned short sectors_per_frame = 601 queue_hardsect_size(drive->queue) >> SECTOR_BITS; 602 int nskip = rq->sector & (sectors_per_frame - 1); 603 604 /* 605 * If the requested sector doesn't start on a frame boundary, 606 * we must adjust the start of the transfer so that it does, 607 * and remember to skip the first few sectors. 608 * 609 * If the rq->current_nr_sectors field is larger than the size 610 * of the buffer, it will mean that we're to skip a number of 611 * sectors equal to the amount by which rq->current_nr_sectors 612 * is larger than the buffer size. 613 */ 614 if (nskip > 0) { 615 /* sanity check... */ 616 if (rq->current_nr_sectors != 617 bio_cur_sectors(rq->bio)) { 618 printk(KERN_ERR PFX "%s: %s: buffer botch (%u)\n", 619 drive->name, __func__, 620 rq->current_nr_sectors); 621 cdrom_end_request(drive, 0); 622 return ide_stopped; 623 } 624 rq->current_nr_sectors += nskip; 625 } 626 } 627 628 /* set up the command */ 629 rq->timeout = ATAPI_WAIT_PC; 630 631 return ide_started; 632} 633 634/* 635 * Fix up a possibly partially-processed request so that we can start it over 636 * entirely, or even put it back on the request queue. 637 */ 638static void ide_cd_restore_request(ide_drive_t *drive, struct request *rq) 639{ 640 641 ide_debug_log(IDE_DBG_FUNC, "enter"); 642 643 if (rq->buffer != bio_data(rq->bio)) { 644 sector_t n = 645 (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE; 646 647 rq->buffer = bio_data(rq->bio); 648 rq->nr_sectors += n; 649 rq->sector -= n; 650 } 651 rq->current_nr_sectors = bio_cur_sectors(rq->bio); 652 rq->hard_cur_sectors = rq->current_nr_sectors; 653 rq->hard_nr_sectors = rq->nr_sectors; 654 rq->hard_sector = rq->sector; 655 rq->q->prep_rq_fn(rq->q, rq); 656} 657 658static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct request *rq) 659{ 660 ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]); 661 662 /* 663 * Some of the trailing request sense fields are optional, 664 * and some drives don't send them. Sigh. 665 */ 666 if (rq->cmd[0] == GPCMD_REQUEST_SENSE && 667 rq->data_len > 0 && rq->data_len <= 5) 668 while (rq->data_len > 0) { 669 *(u8 *)rq->data++ = 0; 670 --rq->data_len; 671 } 672} 673 674int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd, 675 int write, void *buffer, unsigned *bufflen, 676 struct request_sense *sense, int timeout, 677 unsigned int cmd_flags) 678{ 679 struct cdrom_info *info = drive->driver_data; 680 struct request_sense local_sense; 681 int retries = 10; 682 unsigned int flags = 0; 683 684 if (!sense) 685 sense = &local_sense; 686 687 ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, " 688 "cmd_flags: 0x%x", 689 cmd[0], write, timeout, cmd_flags); 690 691 /* start of retry loop */ 692 do { 693 struct request *rq; 694 int error; 695 696 rq = blk_get_request(drive->queue, write, __GFP_WAIT); 697 698 memcpy(rq->cmd, cmd, BLK_MAX_CDB); 699 rq->cmd_type = REQ_TYPE_ATA_PC; 700 rq->sense = sense; 701 rq->cmd_flags |= cmd_flags; 702 rq->timeout = timeout; 703 if (buffer) { 704 rq->data = buffer; 705 rq->data_len = *bufflen; 706 } 707 708 error = blk_execute_rq(drive->queue, info->disk, rq, 0); 709 710 if (buffer) 711 *bufflen = rq->data_len; 712 713 flags = rq->cmd_flags; 714 blk_put_request(rq); 715 716 /* 717 * FIXME: we should probably abort/retry or something in case of 718 * failure. 719 */ 720 if (flags & REQ_FAILED) { 721 /* 722 * The request failed. Retry if it was due to a unit 723 * attention status (usually means media was changed). 724 */ 725 struct request_sense *reqbuf = sense; 726 727 if (reqbuf->sense_key == UNIT_ATTENTION) 728 cdrom_saw_media_change(drive); 729 else if (reqbuf->sense_key == NOT_READY && 730 reqbuf->asc == 4 && reqbuf->ascq != 4) { 731 /* 732 * The drive is in the process of loading 733 * a disk. Retry, but wait a little to give 734 * the drive time to complete the load. 735 */ 736 ssleep(2); 737 } else { 738 /* otherwise, don't retry */ 739 retries = 0; 740 } 741 --retries; 742 } 743 744 /* end of retry loop */ 745 } while ((flags & REQ_FAILED) && retries >= 0); 746 747 /* return an error if the command failed */ 748 return (flags & REQ_FAILED) ? -EIO : 0; 749} 750 751/* 752 * Called from blk_end_request_callback() after the data of the request is 753 * completed and before the request itself is completed. By returning value '1', 754 * blk_end_request_callback() returns immediately without completing it. 755 */ 756static int cdrom_newpc_intr_dummy_cb(struct request *rq) 757{ 758 return 1; 759} 760 761static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive) 762{ 763 ide_hwif_t *hwif = drive->hwif; 764 struct request *rq = hwif->rq; 765 xfer_func_t *xferfunc; 766 ide_expiry_t *expiry = NULL; 767 int dma_error = 0, dma, stat, thislen, uptodate = 0; 768 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0; 769 unsigned int timeout; 770 u16 len; 771 u8 ireason; 772 773 ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x", 774 rq->cmd[0], write); 775 776 /* check for errors */ 777 dma = drive->dma; 778 if (dma) { 779 drive->dma = 0; 780 dma_error = hwif->dma_ops->dma_end(drive); 781 if (dma_error) { 782 printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name, 783 write ? "write" : "read"); 784 ide_dma_off(drive); 785 } 786 } 787 788 if (cdrom_decode_status(drive, 0, &stat)) 789 return ide_stopped; 790 791 /* using dma, transfer is complete now */ 792 if (dma) { 793 if (dma_error) 794 return ide_error(drive, "dma error", stat); 795 if (blk_fs_request(rq)) { 796 ide_end_request(drive, 1, rq->nr_sectors); 797 return ide_stopped; 798 } else if (rq->cmd_type == REQ_TYPE_ATA_PC && !rq->bio) { 799 ide_end_request(drive, 1, 1); 800 return ide_stopped; 801 } 802 goto end_request; 803 } 804 805 ide_read_bcount_and_ireason(drive, &len, &ireason); 806 807 thislen = blk_fs_request(rq) ? len : rq->data_len; 808 if (thislen > len) 809 thislen = len; 810 811 ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d", 812 stat, thislen); 813 814 /* If DRQ is clear, the command has completed. */ 815 if ((stat & ATA_DRQ) == 0) { 816 if (blk_fs_request(rq)) { 817 /* 818 * If we're not done reading/writing, complain. 819 * Otherwise, complete the command normally. 820 */ 821 uptodate = 1; 822 if (rq->current_nr_sectors > 0) { 823 printk(KERN_ERR PFX "%s: %s: data underrun " 824 "(%d blocks)\n", 825 drive->name, __func__, 826 rq->current_nr_sectors); 827 if (!write) 828 rq->cmd_flags |= REQ_FAILED; 829 uptodate = 0; 830 } 831 cdrom_end_request(drive, uptodate); 832 return ide_stopped; 833 } else if (!blk_pc_request(rq)) { 834 ide_cd_request_sense_fixup(drive, rq); 835 /* complain if we still have data left to transfer */ 836 uptodate = rq->data_len ? 0 : 1; 837 } 838 goto end_request; 839 } 840 841 /* check which way to transfer data */ 842 if (ide_cd_check_ireason(drive, rq, len, ireason, write)) 843 return ide_stopped; 844 845 if (blk_fs_request(rq)) { 846 if (write == 0) { 847 int nskip; 848 849 if (ide_cd_check_transfer_size(drive, len)) { 850 cdrom_end_request(drive, 0); 851 return ide_stopped; 852 } 853 854 /* 855 * First, figure out if we need to bit-bucket 856 * any of the leading sectors. 857 */ 858 nskip = min_t(int, rq->current_nr_sectors 859 - bio_cur_sectors(rq->bio), 860 thislen >> 9); 861 if (nskip > 0) { 862 ide_pad_transfer(drive, write, nskip << 9); 863 rq->current_nr_sectors -= nskip; 864 thislen -= (nskip << 9); 865 } 866 } 867 } 868 869 if (ireason == 0) { 870 write = 1; 871 xferfunc = hwif->tp_ops->output_data; 872 } else { 873 write = 0; 874 xferfunc = hwif->tp_ops->input_data; 875 } 876 877 ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, " 878 "ireason: 0x%x", 879 rq->cmd_type, ireason); 880 881 /* transfer data */ 882 while (thislen > 0) { 883 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data; 884 int blen = rq->data_len; 885 886 /* bio backed? */ 887 if (rq->bio) { 888 if (blk_fs_request(rq)) { 889 ptr = rq->buffer; 890 blen = rq->current_nr_sectors << 9; 891 } else { 892 ptr = bio_data(rq->bio); 893 blen = bio_iovec(rq->bio)->bv_len; 894 } 895 } 896 897 if (!ptr) { 898 if (blk_fs_request(rq) && !write) 899 /* 900 * If the buffers are full, pipe the rest into 901 * oblivion. 902 */ 903 ide_pad_transfer(drive, 0, thislen); 904 else { 905 printk(KERN_ERR PFX "%s: confused, missing data\n", 906 drive->name); 907 blk_dump_rq_flags(rq, rq_data_dir(rq) 908 ? "cdrom_newpc_intr, write" 909 : "cdrom_newpc_intr, read"); 910 } 911 break; 912 } 913 914 if (blen > thislen) 915 blen = thislen; 916 917 xferfunc(drive, NULL, ptr, blen); 918 919 thislen -= blen; 920 len -= blen; 921 922 if (blk_fs_request(rq)) { 923 rq->buffer += blen; 924 rq->nr_sectors -= (blen >> 9); 925 rq->current_nr_sectors -= (blen >> 9); 926 rq->sector += (blen >> 9); 927 928 if (rq->current_nr_sectors == 0 && rq->nr_sectors) 929 cdrom_end_request(drive, 1); 930 } else { 931 rq->data_len -= blen; 932 933 /* 934 * The request can't be completed until DRQ is cleared. 935 * So complete the data, but don't complete the request 936 * using the dummy function for the callback feature 937 * of blk_end_request_callback(). 938 */ 939 if (rq->bio) 940 blk_end_request_callback(rq, 0, blen, 941 cdrom_newpc_intr_dummy_cb); 942 else 943 rq->data += blen; 944 } 945 if (!write && blk_sense_request(rq)) 946 rq->sense_len += blen; 947 } 948 949 /* pad, if necessary */ 950 if (!blk_fs_request(rq) && len > 0) 951 ide_pad_transfer(drive, write, len); 952 953 if (blk_pc_request(rq)) { 954 timeout = rq->timeout; 955 } else { 956 timeout = ATAPI_WAIT_PC; 957 if (!blk_fs_request(rq)) 958 expiry = ide_cd_expiry; 959 } 960 961 ide_set_handler(drive, cdrom_newpc_intr, timeout, expiry); 962 return ide_started; 963 964end_request: 965 if (blk_pc_request(rq)) { 966 unsigned int dlen = rq->data_len; 967 968 if (dma) 969 rq->data_len = 0; 970 971 if (blk_end_request(rq, 0, dlen)) 972 BUG(); 973 974 hwif->rq = NULL; 975 } else { 976 if (!uptodate) 977 rq->cmd_flags |= REQ_FAILED; 978 cdrom_end_request(drive, uptodate); 979 } 980 return ide_stopped; 981} 982 983static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq) 984{ 985 struct cdrom_info *cd = drive->driver_data; 986 int write = rq_data_dir(rq) == WRITE; 987 unsigned short sectors_per_frame = 988 queue_hardsect_size(drive->queue) >> SECTOR_BITS; 989 990 ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, write: 0x%x, " 991 "secs_per_frame: %u", 992 rq->cmd[0], write, sectors_per_frame); 993 994 if (write) { 995 /* disk has become write protected */ 996 if (get_disk_ro(cd->disk)) { 997 cdrom_end_request(drive, 0); 998 return ide_stopped; 999 } 1000 } else { 1001 /* 1002 * We may be retrying this request after an error. Fix up any 1003 * weirdness which might be present in the request packet. 1004 */ 1005 ide_cd_restore_request(drive, rq); 1006 } 1007 1008 /* use DMA, if possible / writes *must* be hardware frame aligned */ 1009 if ((rq->nr_sectors & (sectors_per_frame - 1)) || 1010 (rq->sector & (sectors_per_frame - 1))) { 1011 if (write) { 1012 cdrom_end_request(drive, 0); 1013 return ide_stopped; 1014 } 1015 drive->dma = 0; 1016 } else 1017 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA); 1018 1019 if (write) 1020 cd->devinfo.media_written = 1; 1021 1022 return ide_started; 1023} 1024 1025static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq) 1026{ 1027 1028 ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x", 1029 rq->cmd[0], rq->cmd_type); 1030 1031 if (blk_pc_request(rq)) 1032 rq->cmd_flags |= REQ_QUIET; 1033 else 1034 rq->cmd_flags &= ~REQ_FAILED; 1035 1036 drive->dma = 0; 1037 1038 /* sg request */ 1039 if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) { 1040 struct request_queue *q = drive->queue; 1041 unsigned int alignment; 1042 char *buf; 1043 1044 if (rq->bio) 1045 buf = bio_data(rq->bio); 1046 else 1047 buf = rq->data; 1048 1049 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA); 1050 1051 /* 1052 * check if dma is safe 1053 * 1054 * NOTE! The "len" and "addr" checks should possibly have 1055 * separate masks. 1056 */ 1057 alignment = queue_dma_alignment(q) | q->dma_pad_mask; 1058 if ((unsigned long)buf & alignment 1059 || rq->data_len & q->dma_pad_mask 1060 || object_is_on_stack(buf)) 1061 drive->dma = 0; 1062 } 1063} 1064 1065static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq, 1066 sector_t block) 1067{ 1068 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu", 1069 rq->cmd[0], (unsigned long long)block); 1070 1071 if (drive->debug_mask & IDE_DBG_RQ) 1072 blk_dump_rq_flags(rq, "ide_cd_do_request"); 1073 1074 if (blk_fs_request(rq)) { 1075 if (cdrom_start_rw(drive, rq) == ide_stopped) 1076 return ide_stopped; 1077 1078 if (ide_cd_prepare_rw_request(drive, rq) == ide_stopped) 1079 return ide_stopped; 1080 } else if (blk_sense_request(rq) || blk_pc_request(rq) || 1081 rq->cmd_type == REQ_TYPE_ATA_PC) { 1082 if (!rq->timeout) 1083 rq->timeout = ATAPI_WAIT_PC; 1084 1085 cdrom_do_block_pc(drive, rq); 1086 } else if (blk_special_request(rq)) { 1087 /* right now this can only be a reset... */ 1088 cdrom_end_request(drive, 1); 1089 return ide_stopped; 1090 } else { 1091 blk_dump_rq_flags(rq, DRV_NAME " bad flags"); 1092 cdrom_end_request(drive, 0); 1093 return ide_stopped; 1094 } 1095 1096 return ide_issue_pc(drive); 1097} 1098 1099/* 1100 * Ioctl handling. 1101 * 1102 * Routines which queue packet commands take as a final argument a pointer to a 1103 * request_sense struct. If execution of the command results in an error with a 1104 * CHECK CONDITION status, this structure will be filled with the results of the 1105 * subsequent request sense command. The pointer can also be NULL, in which case 1106 * no sense information is returned. 1107 */ 1108static void msf_from_bcd(struct atapi_msf *msf) 1109{ 1110 msf->minute = bcd2bin(msf->minute); 1111 msf->second = bcd2bin(msf->second); 1112 msf->frame = bcd2bin(msf->frame); 1113} 1114 1115int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense) 1116{ 1117 struct cdrom_info *info = drive->driver_data; 1118 struct cdrom_device_info *cdi = &info->devinfo; 1119 unsigned char cmd[BLK_MAX_CDB]; 1120 1121 ide_debug_log(IDE_DBG_FUNC, "enter"); 1122 1123 memset(cmd, 0, BLK_MAX_CDB); 1124 cmd[0] = GPCMD_TEST_UNIT_READY; 1125 1126 /* 1127 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs 1128 * instead of supporting the LOAD_UNLOAD opcode. 1129 */ 1130 cmd[7] = cdi->sanyo_slot % 3; 1131 1132 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET); 1133} 1134 1135static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity, 1136 unsigned long *sectors_per_frame, 1137 struct request_sense *sense) 1138{ 1139 struct { 1140 __be32 lba; 1141 __be32 blocklen; 1142 } capbuf; 1143 1144 int stat; 1145 unsigned char cmd[BLK_MAX_CDB]; 1146 unsigned len = sizeof(capbuf); 1147 u32 blocklen; 1148 1149 ide_debug_log(IDE_DBG_FUNC, "enter"); 1150 1151 memset(cmd, 0, BLK_MAX_CDB); 1152 cmd[0] = GPCMD_READ_CDVD_CAPACITY; 1153 1154 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0, 1155 REQ_QUIET); 1156 if (stat) 1157 return stat; 1158 1159 /* 1160 * Sanity check the given block size 1161 */ 1162 blocklen = be32_to_cpu(capbuf.blocklen); 1163 switch (blocklen) { 1164 case 512: 1165 case 1024: 1166 case 2048: 1167 case 4096: 1168 break; 1169 default: 1170 printk(KERN_ERR PFX "%s: weird block size %u\n", 1171 drive->name, blocklen); 1172 printk(KERN_ERR PFX "%s: default to 2kb block size\n", 1173 drive->name); 1174 blocklen = 2048; 1175 break; 1176 } 1177 1178 *capacity = 1 + be32_to_cpu(capbuf.lba); 1179 *sectors_per_frame = blocklen >> SECTOR_BITS; 1180 1181 ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu", 1182 *capacity, *sectors_per_frame); 1183 1184 return 0; 1185} 1186 1187static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag, 1188 int format, char *buf, int buflen, 1189 struct request_sense *sense) 1190{ 1191 unsigned char cmd[BLK_MAX_CDB]; 1192 1193 ide_debug_log(IDE_DBG_FUNC, "enter"); 1194 1195 memset(cmd, 0, BLK_MAX_CDB); 1196 1197 cmd[0] = GPCMD_READ_TOC_PMA_ATIP; 1198 cmd[6] = trackno; 1199 cmd[7] = (buflen >> 8); 1200 cmd[8] = (buflen & 0xff); 1201 cmd[9] = (format << 6); 1202 1203 if (msf_flag) 1204 cmd[1] = 2; 1205 1206 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET); 1207} 1208 1209/* Try to read the entire TOC for the disk into our internal buffer. */ 1210int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense) 1211{ 1212 int stat, ntracks, i; 1213 struct cdrom_info *info = drive->driver_data; 1214 struct cdrom_device_info *cdi = &info->devinfo; 1215 struct atapi_toc *toc = info->toc; 1216 struct { 1217 struct atapi_toc_header hdr; 1218 struct atapi_toc_entry ent; 1219 } ms_tmp; 1220 long last_written; 1221 unsigned long sectors_per_frame = SECTORS_PER_FRAME; 1222 1223 ide_debug_log(IDE_DBG_FUNC, "enter"); 1224 1225 if (toc == NULL) { 1226 /* try to allocate space */ 1227 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL); 1228 if (toc == NULL) { 1229 printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n", 1230 drive->name); 1231 return -ENOMEM; 1232 } 1233 info->toc = toc; 1234 } 1235 1236 /* 1237 * Check to see if the existing data is still valid. If it is, 1238 * just return. 1239 */ 1240 (void) cdrom_check_status(drive, sense); 1241 1242 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID) 1243 return 0; 1244 1245 /* try to get the total cdrom capacity and sector size */ 1246 stat = cdrom_read_capacity(drive, &toc->capacity, §ors_per_frame, 1247 sense); 1248 if (stat) 1249 toc->capacity = 0x1fffff; 1250 1251 set_capacity(info->disk, toc->capacity * sectors_per_frame); 1252 /* save a private copy of the TOC capacity for error handling */ 1253 drive->probed_capacity = toc->capacity * sectors_per_frame; 1254 1255 blk_queue_hardsect_size(drive->queue, 1256 sectors_per_frame << SECTOR_BITS); 1257 1258 /* first read just the header, so we know how long the TOC is */ 1259 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr, 1260 sizeof(struct atapi_toc_header), sense); 1261 if (stat) 1262 return stat; 1263 1264 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1265 toc->hdr.first_track = bcd2bin(toc->hdr.first_track); 1266 toc->hdr.last_track = bcd2bin(toc->hdr.last_track); 1267 } 1268 1269 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1; 1270 if (ntracks <= 0) 1271 return -EIO; 1272 if (ntracks > MAX_TRACKS) 1273 ntracks = MAX_TRACKS; 1274 1275 /* now read the whole schmeer */ 1276 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0, 1277 (char *)&toc->hdr, 1278 sizeof(struct atapi_toc_header) + 1279 (ntracks + 1) * 1280 sizeof(struct atapi_toc_entry), sense); 1281 1282 if (stat && toc->hdr.first_track > 1) { 1283 /* 1284 * Cds with CDI tracks only don't have any TOC entries, despite 1285 * of this the returned values are 1286 * first_track == last_track = number of CDI tracks + 1, 1287 * so that this case is indistinguishable from the same layout 1288 * plus an additional audio track. If we get an error for the 1289 * regular case, we assume a CDI without additional audio 1290 * tracks. In this case the readable TOC is empty (CDI tracks 1291 * are not included) and only holds the Leadout entry. 1292 * 1293 * Heiko Eißfeldt. 1294 */ 1295 ntracks = 0; 1296 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0, 1297 (char *)&toc->hdr, 1298 sizeof(struct atapi_toc_header) + 1299 (ntracks + 1) * 1300 sizeof(struct atapi_toc_entry), 1301 sense); 1302 if (stat) 1303 return stat; 1304 1305 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1306 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT); 1307 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT); 1308 } else { 1309 toc->hdr.first_track = CDROM_LEADOUT; 1310 toc->hdr.last_track = CDROM_LEADOUT; 1311 } 1312 } 1313 1314 if (stat) 1315 return stat; 1316 1317 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length); 1318 1319 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1320 toc->hdr.first_track = bcd2bin(toc->hdr.first_track); 1321 toc->hdr.last_track = bcd2bin(toc->hdr.last_track); 1322 } 1323 1324 for (i = 0; i <= ntracks; i++) { 1325 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) { 1326 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) 1327 toc->ent[i].track = bcd2bin(toc->ent[i].track); 1328 msf_from_bcd(&toc->ent[i].addr.msf); 1329 } 1330 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute, 1331 toc->ent[i].addr.msf.second, 1332 toc->ent[i].addr.msf.frame); 1333 } 1334 1335 if (toc->hdr.first_track != CDROM_LEADOUT) { 1336 /* read the multisession information */ 1337 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp, 1338 sizeof(ms_tmp), sense); 1339 if (stat) 1340 return stat; 1341 1342 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba); 1343 } else { 1344 ms_tmp.hdr.last_track = CDROM_LEADOUT; 1345 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track; 1346 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */ 1347 } 1348 1349 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) { 1350 /* re-read multisession information using MSF format */ 1351 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp, 1352 sizeof(ms_tmp), sense); 1353 if (stat) 1354 return stat; 1355 1356 msf_from_bcd(&ms_tmp.ent.addr.msf); 1357 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute, 1358 ms_tmp.ent.addr.msf.second, 1359 ms_tmp.ent.addr.msf.frame); 1360 } 1361 1362 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track); 1363 1364 /* now try to get the total cdrom capacity */ 1365 stat = cdrom_get_last_written(cdi, &last_written); 1366 if (!stat && (last_written > toc->capacity)) { 1367 toc->capacity = last_written; 1368 set_capacity(info->disk, toc->capacity * sectors_per_frame); 1369 drive->probed_capacity = toc->capacity * sectors_per_frame; 1370 } 1371 1372 /* Remember that we've read this stuff. */ 1373 drive->atapi_flags |= IDE_AFLAG_TOC_VALID; 1374 1375 return 0; 1376} 1377 1378int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf) 1379{ 1380 struct cdrom_info *info = drive->driver_data; 1381 struct cdrom_device_info *cdi = &info->devinfo; 1382 struct packet_command cgc; 1383 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE; 1384 1385 ide_debug_log(IDE_DBG_FUNC, "enter"); 1386 1387 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0) 1388 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE; 1389 1390 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN); 1391 do { 1392 /* we seem to get stat=0x01,err=0x00 the first time (??) */ 1393 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0); 1394 if (!stat) 1395 break; 1396 } while (--attempts); 1397 return stat; 1398} 1399 1400void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf) 1401{ 1402 struct cdrom_info *cd = drive->driver_data; 1403 u16 curspeed, maxspeed; 1404 1405 ide_debug_log(IDE_DBG_FUNC, "enter"); 1406 1407 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) { 1408 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]); 1409 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]); 1410 } else { 1411 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]); 1412 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]); 1413 } 1414 1415 ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u", 1416 curspeed, maxspeed); 1417 1418 cd->current_speed = (curspeed + (176/2)) / 176; 1419 cd->max_speed = (maxspeed + (176/2)) / 176; 1420} 1421 1422#define IDE_CD_CAPABILITIES \ 1423 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \ 1424 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \ 1425 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \ 1426 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \ 1427 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM) 1428 1429static struct cdrom_device_ops ide_cdrom_dops = { 1430 .open = ide_cdrom_open_real, 1431 .release = ide_cdrom_release_real, 1432 .drive_status = ide_cdrom_drive_status, 1433 .media_changed = ide_cdrom_check_media_change_real, 1434 .tray_move = ide_cdrom_tray_move, 1435 .lock_door = ide_cdrom_lock_door, 1436 .select_speed = ide_cdrom_select_speed, 1437 .get_last_session = ide_cdrom_get_last_session, 1438 .get_mcn = ide_cdrom_get_mcn, 1439 .reset = ide_cdrom_reset, 1440 .audio_ioctl = ide_cdrom_audio_ioctl, 1441 .capability = IDE_CD_CAPABILITIES, 1442 .generic_packet = ide_cdrom_packet, 1443}; 1444 1445static int ide_cdrom_register(ide_drive_t *drive, int nslots) 1446{ 1447 struct cdrom_info *info = drive->driver_data; 1448 struct cdrom_device_info *devinfo = &info->devinfo; 1449 1450 ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots); 1451 1452 devinfo->ops = &ide_cdrom_dops; 1453 devinfo->speed = info->current_speed; 1454 devinfo->capacity = nslots; 1455 devinfo->handle = drive; 1456 strcpy(devinfo->name, drive->name); 1457 1458 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT) 1459 devinfo->mask |= CDC_SELECT_SPEED; 1460 1461 devinfo->disk = info->disk; 1462 return register_cdrom(devinfo); 1463} 1464 1465static int ide_cdrom_probe_capabilities(ide_drive_t *drive) 1466{ 1467 struct cdrom_info *cd = drive->driver_data; 1468 struct cdrom_device_info *cdi = &cd->devinfo; 1469 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE]; 1470 mechtype_t mechtype; 1471 int nslots = 1; 1472 1473 ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx", 1474 drive->media, drive->atapi_flags); 1475 1476 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R | 1477 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO | 1478 CDC_MO_DRIVE | CDC_RAM); 1479 1480 if (drive->media == ide_optical) { 1481 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM); 1482 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n", 1483 drive->name); 1484 return nslots; 1485 } 1486 1487 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) { 1488 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT; 1489 cdi->mask &= ~CDC_PLAY_AUDIO; 1490 return nslots; 1491 } 1492 1493 /* 1494 * We have to cheat a little here. the packet will eventually be queued 1495 * with ide_cdrom_packet(), which extracts the drive from cdi->handle. 1496 * Since this device hasn't been registered with the Uniform layer yet, 1497 * it can't do this. Same goes for cdi->ops. 1498 */ 1499 cdi->handle = drive; 1500 cdi->ops = &ide_cdrom_dops; 1501 1502 if (ide_cdrom_get_capabilities(drive, buf)) 1503 return 0; 1504 1505 if ((buf[8 + 6] & 0x01) == 0) 1506 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING; 1507 if (buf[8 + 6] & 0x08) 1508 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT; 1509 if (buf[8 + 3] & 0x01) 1510 cdi->mask &= ~CDC_CD_R; 1511 if (buf[8 + 3] & 0x02) 1512 cdi->mask &= ~(CDC_CD_RW | CDC_RAM); 1513 if (buf[8 + 2] & 0x38) 1514 cdi->mask &= ~CDC_DVD; 1515 if (buf[8 + 3] & 0x20) 1516 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM); 1517 if (buf[8 + 3] & 0x10) 1518 cdi->mask &= ~CDC_DVD_R; 1519 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK)) 1520 cdi->mask &= ~CDC_PLAY_AUDIO; 1521 1522 mechtype = buf[8 + 6] >> 5; 1523 if (mechtype == mechtype_caddy || 1524 mechtype == mechtype_popup || 1525 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE)) 1526 cdi->mask |= CDC_CLOSE_TRAY; 1527 1528 if (cdi->sanyo_slot > 0) { 1529 cdi->mask &= ~CDC_SELECT_DISC; 1530 nslots = 3; 1531 } else if (mechtype == mechtype_individual_changer || 1532 mechtype == mechtype_cartridge_changer) { 1533 nslots = cdrom_number_of_slots(cdi); 1534 if (nslots > 1) 1535 cdi->mask &= ~CDC_SELECT_DISC; 1536 } 1537 1538 ide_cdrom_update_speed(drive, buf); 1539 1540 printk(KERN_INFO PFX "%s: ATAPI", drive->name); 1541 1542 /* don't print speed if the drive reported 0 */ 1543 if (cd->max_speed) 1544 printk(KERN_CONT " %dX", cd->max_speed); 1545 1546 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM"); 1547 1548 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0) 1549 printk(KERN_CONT " DVD%s%s", 1550 (cdi->mask & CDC_DVD_R) ? "" : "-R", 1551 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM"); 1552 1553 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0) 1554 printk(KERN_CONT " CD%s%s", 1555 (cdi->mask & CDC_CD_R) ? "" : "-R", 1556 (cdi->mask & CDC_CD_RW) ? "" : "/RW"); 1557 1558 if ((cdi->mask & CDC_SELECT_DISC) == 0) 1559 printk(KERN_CONT " changer w/%d slots", nslots); 1560 else 1561 printk(KERN_CONT " drive"); 1562 1563 printk(KERN_CONT ", %dkB Cache\n", 1564 be16_to_cpup((__be16 *)&buf[8 + 12])); 1565 1566 return nslots; 1567} 1568 1569/* standard prep_rq_fn that builds 10 byte cmds */ 1570static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq) 1571{ 1572 int hard_sect = queue_hardsect_size(q); 1573 long block = (long)rq->hard_sector / (hard_sect >> 9); 1574 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9); 1575 1576 memset(rq->cmd, 0, BLK_MAX_CDB); 1577 1578 if (rq_data_dir(rq) == READ) 1579 rq->cmd[0] = GPCMD_READ_10; 1580 else 1581 rq->cmd[0] = GPCMD_WRITE_10; 1582 1583 /* 1584 * fill in lba 1585 */ 1586 rq->cmd[2] = (block >> 24) & 0xff; 1587 rq->cmd[3] = (block >> 16) & 0xff; 1588 rq->cmd[4] = (block >> 8) & 0xff; 1589 rq->cmd[5] = block & 0xff; 1590 1591 /* 1592 * and transfer length 1593 */ 1594 rq->cmd[7] = (blocks >> 8) & 0xff; 1595 rq->cmd[8] = blocks & 0xff; 1596 rq->cmd_len = 10; 1597 return BLKPREP_OK; 1598} 1599 1600/* 1601 * Most of the SCSI commands are supported directly by ATAPI devices. 1602 * This transform handles the few exceptions. 1603 */ 1604static int ide_cdrom_prep_pc(struct request *rq) 1605{ 1606 u8 *c = rq->cmd; 1607 1608 /* transform 6-byte read/write commands to the 10-byte version */ 1609 if (c[0] == READ_6 || c[0] == WRITE_6) { 1610 c[8] = c[4]; 1611 c[5] = c[3]; 1612 c[4] = c[2]; 1613 c[3] = c[1] & 0x1f; 1614 c[2] = 0; 1615 c[1] &= 0xe0; 1616 c[0] += (READ_10 - READ_6); 1617 rq->cmd_len = 10; 1618 return BLKPREP_OK; 1619 } 1620 1621 /* 1622 * it's silly to pretend we understand 6-byte sense commands, just 1623 * reject with ILLEGAL_REQUEST and the caller should take the 1624 * appropriate action 1625 */ 1626 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) { 1627 rq->errors = ILLEGAL_REQUEST; 1628 return BLKPREP_KILL; 1629 } 1630 1631 return BLKPREP_OK; 1632} 1633 1634static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq) 1635{ 1636 if (blk_fs_request(rq)) 1637 return ide_cdrom_prep_fs(q, rq); 1638 else if (blk_pc_request(rq)) 1639 return ide_cdrom_prep_pc(rq); 1640 1641 return 0; 1642} 1643 1644struct cd_list_entry { 1645 const char *id_model; 1646 const char *id_firmware; 1647 unsigned int cd_flags; 1648}; 1649 1650#ifdef CONFIG_IDE_PROC_FS 1651static sector_t ide_cdrom_capacity(ide_drive_t *drive) 1652{ 1653 unsigned long capacity, sectors_per_frame; 1654 1655 if (cdrom_read_capacity(drive, &capacity, §ors_per_frame, NULL)) 1656 return 0; 1657 1658 return capacity * sectors_per_frame; 1659} 1660 1661static int proc_idecd_read_capacity(char *page, char **start, off_t off, 1662 int count, int *eof, void *data) 1663{ 1664 ide_drive_t *drive = data; 1665 int len; 1666 1667 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive)); 1668 PROC_IDE_READ_RETURN(page, start, off, count, eof, len); 1669} 1670 1671static ide_proc_entry_t idecd_proc[] = { 1672 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL }, 1673 { NULL, 0, NULL, NULL } 1674}; 1675 1676static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive) 1677{ 1678 return idecd_proc; 1679} 1680 1681static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive) 1682{ 1683 return NULL; 1684} 1685#endif 1686 1687static const struct cd_list_entry ide_cd_quirks_list[] = { 1688 /* Limit transfer size per interrupt. */ 1689 { "SAMSUNG CD-ROM SCR-2430", NULL, IDE_AFLAG_LIMIT_NFRAMES }, 1690 { "SAMSUNG CD-ROM SCR-2432", NULL, IDE_AFLAG_LIMIT_NFRAMES }, 1691 /* SCR-3231 doesn't support the SET_CD_SPEED command. */ 1692 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT }, 1693 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */ 1694 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD | 1695 IDE_AFLAG_PRE_ATAPI12, }, 1696 /* Vertos 300, some versions of this drive like to talk BCD. */ 1697 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, }, 1698 /* Vertos 600 ESD. */ 1699 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, }, 1700 /* 1701 * Sanyo 3 CD changer uses a non-standard command for CD changing 1702 * (by default standard ATAPI support for CD changers is used). 1703 */ 1704 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD }, 1705 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD }, 1706 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD }, 1707 /* Stingray 8X CD-ROM. */ 1708 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 }, 1709 /* 1710 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length 1711 * mode sense page capabilities size, but older drives break. 1712 */ 1713 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE }, 1714 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE }, 1715 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */ 1716 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS }, 1717 /* 1718 * Some drives used by Apple don't advertise audio play 1719 * but they do support reading TOC & audio datas. 1720 */ 1721 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1722 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1723 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1724 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1725 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1726 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1727 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE }, 1728 { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE }, 1729 { NULL, NULL, 0 } 1730}; 1731 1732static unsigned int ide_cd_flags(u16 *id) 1733{ 1734 const struct cd_list_entry *cle = ide_cd_quirks_list; 1735 1736 while (cle->id_model) { 1737 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 && 1738 (cle->id_firmware == NULL || 1739 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware))) 1740 return cle->cd_flags; 1741 cle++; 1742 } 1743 1744 return 0; 1745} 1746 1747static int ide_cdrom_setup(ide_drive_t *drive) 1748{ 1749 struct cdrom_info *cd = drive->driver_data; 1750 struct cdrom_device_info *cdi = &cd->devinfo; 1751 u16 *id = drive->id; 1752 char *fw_rev = (char *)&id[ATA_ID_FW_REV]; 1753 int nslots; 1754 1755 ide_debug_log(IDE_DBG_PROBE, "enter"); 1756 1757 blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn); 1758 blk_queue_dma_alignment(drive->queue, 31); 1759 blk_queue_update_dma_pad(drive->queue, 15); 1760 drive->queue->unplug_delay = (1 * HZ) / 1000; 1761 if (!drive->queue->unplug_delay) 1762 drive->queue->unplug_delay = 1; 1763 1764 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED; 1765 drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id); 1766 1767 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) && 1768 fw_rev[4] == '1' && fw_rev[6] <= '2') 1769 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD | 1770 IDE_AFLAG_TOCADDR_AS_BCD); 1771 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) && 1772 fw_rev[4] == '1' && fw_rev[6] <= '2') 1773 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD; 1774 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD) 1775 /* 3 => use CD in slot 0 */ 1776 cdi->sanyo_slot = 3; 1777 1778 nslots = ide_cdrom_probe_capabilities(drive); 1779 1780 /* set correct block size */ 1781 blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE); 1782 1783 if (ide_cdrom_register(drive, nslots)) { 1784 printk(KERN_ERR PFX "%s: %s failed to register device with the" 1785 " cdrom driver.\n", drive->name, __func__); 1786 cd->devinfo.handle = NULL; 1787 return 1; 1788 } 1789 1790 ide_proc_register_driver(drive, cd->driver); 1791 return 0; 1792} 1793 1794static void ide_cd_remove(ide_drive_t *drive) 1795{ 1796 struct cdrom_info *info = drive->driver_data; 1797 1798 ide_debug_log(IDE_DBG_FUNC, "enter"); 1799 1800 ide_proc_unregister_driver(drive, info->driver); 1801 device_del(&info->dev); 1802 del_gendisk(info->disk); 1803 1804 mutex_lock(&idecd_ref_mutex); 1805 put_device(&info->dev); 1806 mutex_unlock(&idecd_ref_mutex); 1807} 1808 1809static void ide_cd_release(struct device *dev) 1810{ 1811 struct cdrom_info *info = to_ide_drv(dev, cdrom_info); 1812 struct cdrom_device_info *devinfo = &info->devinfo; 1813 ide_drive_t *drive = info->drive; 1814 struct gendisk *g = info->disk; 1815 1816 ide_debug_log(IDE_DBG_FUNC, "enter"); 1817 1818 kfree(info->toc); 1819 if (devinfo->handle == drive) 1820 unregister_cdrom(devinfo); 1821 drive->driver_data = NULL; 1822 blk_queue_prep_rq(drive->queue, NULL); 1823 g->private_data = NULL; 1824 put_disk(g); 1825 kfree(info); 1826} 1827 1828static int ide_cd_probe(ide_drive_t *); 1829 1830static struct ide_driver ide_cdrom_driver = { 1831 .gen_driver = { 1832 .owner = THIS_MODULE, 1833 .name = "ide-cdrom", 1834 .bus = &ide_bus_type, 1835 }, 1836 .probe = ide_cd_probe, 1837 .remove = ide_cd_remove, 1838 .version = IDECD_VERSION, 1839 .do_request = ide_cd_do_request, 1840#ifdef CONFIG_IDE_PROC_FS 1841 .proc_entries = ide_cd_proc_entries, 1842 .proc_devsets = ide_cd_proc_devsets, 1843#endif 1844}; 1845 1846static int idecd_open(struct block_device *bdev, fmode_t mode) 1847{ 1848 struct cdrom_info *info = ide_cd_get(bdev->bd_disk); 1849 int rc = -ENOMEM; 1850 1851 if (!info) 1852 return -ENXIO; 1853 1854 rc = cdrom_open(&info->devinfo, bdev, mode); 1855 1856 if (rc < 0) 1857 ide_cd_put(info); 1858 1859 return rc; 1860} 1861 1862static int idecd_release(struct gendisk *disk, fmode_t mode) 1863{ 1864 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 1865 1866 cdrom_release(&info->devinfo, mode); 1867 1868 ide_cd_put(info); 1869 1870 return 0; 1871} 1872 1873static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg) 1874{ 1875 struct packet_command cgc; 1876 char buffer[16]; 1877 int stat; 1878 char spindown; 1879 1880 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char))) 1881 return -EFAULT; 1882 1883 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN); 1884 1885 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0); 1886 if (stat) 1887 return stat; 1888 1889 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f); 1890 return cdrom_mode_select(cdi, &cgc); 1891} 1892 1893static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg) 1894{ 1895 struct packet_command cgc; 1896 char buffer[16]; 1897 int stat; 1898 char spindown; 1899 1900 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN); 1901 1902 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0); 1903 if (stat) 1904 return stat; 1905 1906 spindown = buffer[11] & 0x0f; 1907 if (copy_to_user((void __user *)arg, &spindown, sizeof(char))) 1908 return -EFAULT; 1909 return 0; 1910} 1911 1912static int idecd_ioctl(struct block_device *bdev, fmode_t mode, 1913 unsigned int cmd, unsigned long arg) 1914{ 1915 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info); 1916 int err; 1917 1918 switch (cmd) { 1919 case CDROMSETSPINDOWN: 1920 return idecd_set_spindown(&info->devinfo, arg); 1921 case CDROMGETSPINDOWN: 1922 return idecd_get_spindown(&info->devinfo, arg); 1923 default: 1924 break; 1925 } 1926 1927 err = generic_ide_ioctl(info->drive, bdev, cmd, arg); 1928 if (err == -EINVAL) 1929 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg); 1930 1931 return err; 1932} 1933 1934static int idecd_media_changed(struct gendisk *disk) 1935{ 1936 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 1937 return cdrom_media_changed(&info->devinfo); 1938} 1939 1940static int idecd_revalidate_disk(struct gendisk *disk) 1941{ 1942 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 1943 struct request_sense sense; 1944 1945 ide_cd_read_toc(info->drive, &sense); 1946 1947 return 0; 1948} 1949 1950static struct block_device_operations idecd_ops = { 1951 .owner = THIS_MODULE, 1952 .open = idecd_open, 1953 .release = idecd_release, 1954 .locked_ioctl = idecd_ioctl, 1955 .media_changed = idecd_media_changed, 1956 .revalidate_disk = idecd_revalidate_disk 1957}; 1958 1959/* module options */ 1960static char *ignore; 1961module_param(ignore, charp, 0400); 1962 1963static unsigned long debug_mask; 1964module_param(debug_mask, ulong, 0644); 1965 1966MODULE_DESCRIPTION("ATAPI CD-ROM Driver"); 1967 1968static int ide_cd_probe(ide_drive_t *drive) 1969{ 1970 struct cdrom_info *info; 1971 struct gendisk *g; 1972 struct request_sense sense; 1973 1974 ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x", 1975 drive->driver_req, drive->media); 1976 1977 if (!strstr("ide-cdrom", drive->driver_req)) 1978 goto failed; 1979 1980 if (drive->media != ide_cdrom && drive->media != ide_optical) 1981 goto failed; 1982 1983 /* skip drives that we were told to ignore */ 1984 if (ignore != NULL) { 1985 if (strstr(ignore, drive->name)) { 1986 printk(KERN_INFO PFX "ignoring drive %s\n", 1987 drive->name); 1988 goto failed; 1989 } 1990 } 1991 1992 drive->debug_mask = debug_mask; 1993 drive->irq_handler = cdrom_newpc_intr; 1994 1995 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL); 1996 if (info == NULL) { 1997 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n", 1998 drive->name); 1999 goto failed; 2000 } 2001 2002 g = alloc_disk(1 << PARTN_BITS); 2003 if (!g) 2004 goto out_free_cd; 2005 2006 ide_init_disk(g, drive); 2007 2008 info->dev.parent = &drive->gendev; 2009 info->dev.release = ide_cd_release; 2010 dev_set_name(&info->dev, dev_name(&drive->gendev)); 2011 2012 if (device_register(&info->dev)) 2013 goto out_free_disk; 2014 2015 info->drive = drive; 2016 info->driver = &ide_cdrom_driver; 2017 info->disk = g; 2018 2019 g->private_data = &info->driver; 2020 2021 drive->driver_data = info; 2022 2023 g->minors = 1; 2024 g->driverfs_dev = &drive->gendev; 2025 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE; 2026 if (ide_cdrom_setup(drive)) { 2027 put_device(&info->dev); 2028 goto failed; 2029 } 2030 2031 ide_cd_read_toc(drive, &sense); 2032 g->fops = &idecd_ops; 2033 g->flags |= GENHD_FL_REMOVABLE; 2034 add_disk(g); 2035 return 0; 2036 2037out_free_disk: 2038 put_disk(g); 2039out_free_cd: 2040 kfree(info); 2041failed: 2042 return -ENODEV; 2043} 2044 2045static void __exit ide_cdrom_exit(void) 2046{ 2047 driver_unregister(&ide_cdrom_driver.gen_driver); 2048} 2049 2050static int __init ide_cdrom_init(void) 2051{ 2052 printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n"); 2053 return driver_register(&ide_cdrom_driver.gen_driver); 2054} 2055 2056MODULE_ALIAS("ide:*m-cdrom*"); 2057MODULE_ALIAS("ide-cd"); 2058module_init(ide_cdrom_init); 2059module_exit(ide_cdrom_exit); 2060MODULE_LICENSE("GPL"); 2061