ide-cd.c revision ae8789f034ffa077105575817ec0cc581fd18d83
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 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 55#define to_ide_cd(obj) container_of(obj, struct cdrom_info, kref) 56 57#define ide_cd_g(disk) \ 58 container_of((disk)->private_data, struct cdrom_info, driver) 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_cd_g(disk); 66 if (cd) 67 kref_get(&cd->kref); 68 mutex_unlock(&idecd_ref_mutex); 69 return cd; 70} 71 72static void ide_cd_release(struct kref *); 73 74static void ide_cd_put(struct cdrom_info *cd) 75{ 76 mutex_lock(&idecd_ref_mutex); 77 kref_put(&cd->kref, ide_cd_release); 78 mutex_unlock(&idecd_ref_mutex); 79} 80 81/* 82 * Generic packet command support and error handling routines. 83 */ 84 85/* Mark that we've seen a media change and invalidate our internal buffers. */ 86static void cdrom_saw_media_change(ide_drive_t *drive) 87{ 88 struct cdrom_info *cd = drive->driver_data; 89 90 cd->cd_flags |= IDE_CD_FLAG_MEDIA_CHANGED; 91 cd->cd_flags &= ~IDE_CD_FLAG_TOC_VALID; 92} 93 94static int cdrom_log_sense(ide_drive_t *drive, struct request *rq, 95 struct request_sense *sense) 96{ 97 int log = 0; 98 99 if (!sense || !rq || (rq->cmd_flags & REQ_QUIET)) 100 return 0; 101 102 switch (sense->sense_key) { 103 case NO_SENSE: 104 case RECOVERED_ERROR: 105 break; 106 case NOT_READY: 107 /* 108 * don't care about tray state messages for e.g. capacity 109 * commands or in-progress or becoming ready 110 */ 111 if (sense->asc == 0x3a || sense->asc == 0x04) 112 break; 113 log = 1; 114 break; 115 case ILLEGAL_REQUEST: 116 /* 117 * don't log START_STOP unit with LoEj set, since we cannot 118 * reliably check if drive can auto-close 119 */ 120 if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24) 121 break; 122 log = 1; 123 break; 124 case UNIT_ATTENTION: 125 /* 126 * Make good and sure we've seen this potential media change. 127 * Some drives (i.e. Creative) fail to present the correct sense 128 * key in the error register. 129 */ 130 cdrom_saw_media_change(drive); 131 break; 132 default: 133 log = 1; 134 break; 135 } 136 return log; 137} 138 139static void cdrom_analyze_sense_data(ide_drive_t *drive, 140 struct request *failed_command, 141 struct request_sense *sense) 142{ 143 unsigned long sector; 144 unsigned long bio_sectors; 145 struct cdrom_info *info = drive->driver_data; 146 147 if (!cdrom_log_sense(drive, failed_command, sense)) 148 return; 149 150 /* 151 * If a read toc is executed for a CD-R or CD-RW medium where the first 152 * toc has not been recorded yet, it will fail with 05/24/00 (which is a 153 * confusing error) 154 */ 155 if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP) 156 if (sense->sense_key == 0x05 && sense->asc == 0x24) 157 return; 158 159 /* current error */ 160 if (sense->error_code == 0x70) { 161 switch (sense->sense_key) { 162 case MEDIUM_ERROR: 163 case VOLUME_OVERFLOW: 164 case ILLEGAL_REQUEST: 165 if (!sense->valid) 166 break; 167 if (failed_command == NULL || 168 !blk_fs_request(failed_command)) 169 break; 170 sector = (sense->information[0] << 24) | 171 (sense->information[1] << 16) | 172 (sense->information[2] << 8) | 173 (sense->information[3]); 174 175 if (drive->queue->hardsect_size == 2048) 176 /* device sector size is 2K */ 177 sector <<= 2; 178 179 bio_sectors = max(bio_sectors(failed_command->bio), 4U); 180 sector &= ~(bio_sectors - 1); 181 182 if (sector < get_capacity(info->disk) && 183 drive->probed_capacity - sector < 4 * 75) 184 set_capacity(info->disk, sector); 185 } 186 } 187 188 ide_cd_log_error(drive->name, failed_command, sense); 189} 190 191static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense, 192 struct request *failed_command) 193{ 194 struct cdrom_info *info = drive->driver_data; 195 struct request *rq = &info->request_sense_request; 196 197 if (sense == NULL) 198 sense = &info->sense_data; 199 200 /* stuff the sense request in front of our current request */ 201 blk_rq_init(NULL, rq); 202 rq->cmd_type = REQ_TYPE_ATA_PC; 203 rq->rq_disk = info->disk; 204 205 rq->data = sense; 206 rq->cmd[0] = GPCMD_REQUEST_SENSE; 207 rq->cmd[4] = 18; 208 rq->data_len = 18; 209 210 rq->cmd_type = REQ_TYPE_SENSE; 211 rq->cmd_flags |= REQ_PREEMPT; 212 213 /* NOTE! Save the failed command in "rq->buffer" */ 214 rq->buffer = (void *) failed_command; 215 216 ide_do_drive_cmd(drive, rq); 217} 218 219static void cdrom_end_request(ide_drive_t *drive, int uptodate) 220{ 221 struct request *rq = HWGROUP(drive)->rq; 222 int nsectors = rq->hard_cur_sectors; 223 224 if (blk_sense_request(rq) && uptodate) { 225 /* 226 * For REQ_TYPE_SENSE, "rq->buffer" points to the original 227 * failed request 228 */ 229 struct request *failed = (struct request *) rq->buffer; 230 struct cdrom_info *info = drive->driver_data; 231 void *sense = &info->sense_data; 232 unsigned long flags; 233 234 if (failed) { 235 if (failed->sense) { 236 sense = failed->sense; 237 failed->sense_len = rq->sense_len; 238 } 239 cdrom_analyze_sense_data(drive, failed, sense); 240 /* 241 * now end the failed request 242 */ 243 if (blk_fs_request(failed)) { 244 if (ide_end_dequeued_request(drive, failed, 0, 245 failed->hard_nr_sectors)) 246 BUG(); 247 } else { 248 spin_lock_irqsave(&ide_lock, flags); 249 if (__blk_end_request(failed, -EIO, 250 failed->data_len)) 251 BUG(); 252 spin_unlock_irqrestore(&ide_lock, flags); 253 } 254 } else 255 cdrom_analyze_sense_data(drive, NULL, sense); 256 } 257 258 if (!rq->current_nr_sectors && blk_fs_request(rq)) 259 uptodate = 1; 260 /* make sure it's fully ended */ 261 if (blk_pc_request(rq)) 262 nsectors = (rq->data_len + 511) >> 9; 263 if (!nsectors) 264 nsectors = 1; 265 266 ide_end_request(drive, uptodate, nsectors); 267} 268 269static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 st) 270{ 271 if (st & 0x80) 272 return; 273 ide_dump_status(drive, msg, st); 274} 275 276/* 277 * Returns: 278 * 0: if the request should be continued. 279 * 1: if the request was ended. 280 */ 281static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret) 282{ 283 struct request *rq = HWGROUP(drive)->rq; 284 int stat, err, sense_key; 285 286 /* check for errors */ 287 stat = ide_read_status(drive); 288 289 if (stat_ret) 290 *stat_ret = stat; 291 292 if (OK_STAT(stat, good_stat, BAD_R_STAT)) 293 return 0; 294 295 /* get the IDE error register */ 296 err = ide_read_error(drive); 297 sense_key = err >> 4; 298 299 if (rq == NULL) { 300 printk(KERN_ERR "%s: missing rq in %s\n", 301 drive->name, __func__); 302 return 1; 303 } 304 305 if (blk_sense_request(rq)) { 306 /* 307 * We got an error trying to get sense info from the drive 308 * (probably while trying to recover from a former error). 309 * Just give up. 310 */ 311 rq->cmd_flags |= REQ_FAILED; 312 cdrom_end_request(drive, 0); 313 ide_error(drive, "request sense failure", stat); 314 return 1; 315 316 } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) { 317 /* All other functions, except for READ. */ 318 319 /* 320 * if we have an error, pass back CHECK_CONDITION as the 321 * scsi status byte 322 */ 323 if (blk_pc_request(rq) && !rq->errors) 324 rq->errors = SAM_STAT_CHECK_CONDITION; 325 326 /* check for tray open */ 327 if (sense_key == NOT_READY) { 328 cdrom_saw_media_change(drive); 329 } else if (sense_key == UNIT_ATTENTION) { 330 /* check for media change */ 331 cdrom_saw_media_change(drive); 332 return 0; 333 } else if (sense_key == ILLEGAL_REQUEST && 334 rq->cmd[0] == GPCMD_START_STOP_UNIT) { 335 /* 336 * Don't print error message for this condition-- 337 * SFF8090i indicates that 5/24/00 is the correct 338 * response to a request to close the tray if the 339 * drive doesn't have that capability. 340 * cdrom_log_sense() knows this! 341 */ 342 } else if (!(rq->cmd_flags & REQ_QUIET)) { 343 /* otherwise, print an error */ 344 ide_dump_status(drive, "packet command error", stat); 345 } 346 347 rq->cmd_flags |= REQ_FAILED; 348 349 /* 350 * instead of playing games with moving completions around, 351 * remove failed request completely and end it when the 352 * request sense has completed 353 */ 354 goto end_request; 355 356 } else if (blk_fs_request(rq)) { 357 int do_end_request = 0; 358 359 /* handle errors from READ and WRITE requests */ 360 361 if (blk_noretry_request(rq)) 362 do_end_request = 1; 363 364 if (sense_key == NOT_READY) { 365 /* tray open */ 366 if (rq_data_dir(rq) == READ) { 367 cdrom_saw_media_change(drive); 368 369 /* fail the request */ 370 printk(KERN_ERR "%s: tray open\n", drive->name); 371 do_end_request = 1; 372 } else { 373 struct cdrom_info *info = drive->driver_data; 374 375 /* 376 * Allow the drive 5 seconds to recover, some 377 * devices will return this error while flushing 378 * data from cache. 379 */ 380 if (!rq->errors) 381 info->write_timeout = jiffies + 382 ATAPI_WAIT_WRITE_BUSY; 383 rq->errors = 1; 384 if (time_after(jiffies, info->write_timeout)) 385 do_end_request = 1; 386 else { 387 unsigned long flags; 388 389 /* 390 * take a breather relying on the unplug 391 * timer to kick us again 392 */ 393 spin_lock_irqsave(&ide_lock, flags); 394 blk_plug_device(drive->queue); 395 spin_unlock_irqrestore(&ide_lock, 396 flags); 397 return 1; 398 } 399 } 400 } else if (sense_key == UNIT_ATTENTION) { 401 /* media change */ 402 cdrom_saw_media_change(drive); 403 404 /* 405 * Arrange to retry the request but be sure to give up 406 * if we've retried too many times. 407 */ 408 if (++rq->errors > ERROR_MAX) 409 do_end_request = 1; 410 } else if (sense_key == ILLEGAL_REQUEST || 411 sense_key == DATA_PROTECT) { 412 /* 413 * No point in retrying after an illegal request or data 414 * protect error. 415 */ 416 ide_dump_status_no_sense(drive, "command error", stat); 417 do_end_request = 1; 418 } else if (sense_key == MEDIUM_ERROR) { 419 /* 420 * No point in re-trying a zillion times on a bad 421 * sector. If we got here the error is not correctable. 422 */ 423 ide_dump_status_no_sense(drive, 424 "media error (bad sector)", 425 stat); 426 do_end_request = 1; 427 } else if (sense_key == BLANK_CHECK) { 428 /* disk appears blank ?? */ 429 ide_dump_status_no_sense(drive, "media error (blank)", 430 stat); 431 do_end_request = 1; 432 } else if ((err & ~ABRT_ERR) != 0) { 433 /* go to the default handler for other errors */ 434 ide_error(drive, "cdrom_decode_status", stat); 435 return 1; 436 } else if ((++rq->errors > ERROR_MAX)) { 437 /* we've racked up too many retries, abort */ 438 do_end_request = 1; 439 } 440 441 /* 442 * End a request through request sense analysis when we have 443 * sense data. We need this in order to perform end of media 444 * processing. 445 */ 446 if (do_end_request) 447 goto end_request; 448 449 /* 450 * If we got a CHECK_CONDITION status, queue 451 * a request sense command. 452 */ 453 if (stat & ERR_STAT) 454 cdrom_queue_request_sense(drive, NULL, NULL); 455 } else { 456 blk_dump_rq_flags(rq, "ide-cd: bad rq"); 457 cdrom_end_request(drive, 0); 458 } 459 460 /* retry, or handle the next request */ 461 return 1; 462 463end_request: 464 if (stat & ERR_STAT) { 465 unsigned long flags; 466 467 spin_lock_irqsave(&ide_lock, flags); 468 blkdev_dequeue_request(rq); 469 HWGROUP(drive)->rq = NULL; 470 spin_unlock_irqrestore(&ide_lock, flags); 471 472 cdrom_queue_request_sense(drive, rq->sense, rq); 473 } else 474 cdrom_end_request(drive, 0); 475 476 return 1; 477} 478 479static int cdrom_timer_expiry(ide_drive_t *drive) 480{ 481 struct request *rq = HWGROUP(drive)->rq; 482 unsigned long wait = 0; 483 484 /* 485 * Some commands are *slow* and normally take a long time to complete. 486 * Usually we can use the ATAPI "disconnect" to bypass this, but not all 487 * commands/drives support that. Let ide_timer_expiry keep polling us 488 * for these. 489 */ 490 switch (rq->cmd[0]) { 491 case GPCMD_BLANK: 492 case GPCMD_FORMAT_UNIT: 493 case GPCMD_RESERVE_RZONE_TRACK: 494 case GPCMD_CLOSE_TRACK: 495 case GPCMD_FLUSH_CACHE: 496 wait = ATAPI_WAIT_PC; 497 break; 498 default: 499 if (!(rq->cmd_flags & REQ_QUIET)) 500 printk(KERN_INFO "ide-cd: cmd 0x%x timed out\n", 501 rq->cmd[0]); 502 wait = 0; 503 break; 504 } 505 return wait; 506} 507 508/* 509 * Set up the device registers for transferring a packet command on DEV, 510 * expecting to later transfer XFERLEN bytes. HANDLER is the routine 511 * which actually transfers the command to the drive. If this is a 512 * drq_interrupt device, this routine will arrange for HANDLER to be 513 * called when the interrupt from the drive arrives. Otherwise, HANDLER 514 * will be called immediately after the drive is prepared for the transfer. 515 */ 516static ide_startstop_t cdrom_start_packet_command(ide_drive_t *drive, 517 int xferlen, 518 ide_handler_t *handler) 519{ 520 struct cdrom_info *info = drive->driver_data; 521 ide_hwif_t *hwif = drive->hwif; 522 523 /* FIXME: for Virtual DMA we must check harder */ 524 if (info->dma) 525 info->dma = !hwif->dma_ops->dma_setup(drive); 526 527 /* set up the controller registers */ 528 ide_pktcmd_tf_load(drive, IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL, 529 xferlen, info->dma); 530 531 if (info->cd_flags & IDE_CD_FLAG_DRQ_INTERRUPT) { 532 /* waiting for CDB interrupt, not DMA yet. */ 533 if (info->dma) 534 drive->waiting_for_dma = 0; 535 536 /* packet command */ 537 ide_execute_command(drive, WIN_PACKETCMD, handler, 538 ATAPI_WAIT_PC, cdrom_timer_expiry); 539 return ide_started; 540 } else { 541 ide_execute_pkt_cmd(drive); 542 543 return (*handler) (drive); 544 } 545} 546 547/* 548 * Send a packet command to DRIVE described by CMD_BUF and CMD_LEN. The device 549 * registers must have already been prepared by cdrom_start_packet_command. 550 * HANDLER is the interrupt handler to call when the command completes or 551 * there's data ready. 552 */ 553#define ATAPI_MIN_CDB_BYTES 12 554static ide_startstop_t cdrom_transfer_packet_command(ide_drive_t *drive, 555 struct request *rq, 556 ide_handler_t *handler) 557{ 558 ide_hwif_t *hwif = drive->hwif; 559 int cmd_len; 560 struct cdrom_info *info = drive->driver_data; 561 ide_startstop_t startstop; 562 563 if (info->cd_flags & IDE_CD_FLAG_DRQ_INTERRUPT) { 564 /* 565 * Here we should have been called after receiving an interrupt 566 * from the device. DRQ should how be set. 567 */ 568 569 /* check for errors */ 570 if (cdrom_decode_status(drive, DRQ_STAT, NULL)) 571 return ide_stopped; 572 573 /* ok, next interrupt will be DMA interrupt */ 574 if (info->dma) 575 drive->waiting_for_dma = 1; 576 } else { 577 /* otherwise, we must wait for DRQ to get set */ 578 if (ide_wait_stat(&startstop, drive, DRQ_STAT, 579 BUSY_STAT, WAIT_READY)) 580 return startstop; 581 } 582 583 /* arm the interrupt handler */ 584 ide_set_handler(drive, handler, rq->timeout, cdrom_timer_expiry); 585 586 /* ATAPI commands get padded out to 12 bytes minimum */ 587 cmd_len = COMMAND_SIZE(rq->cmd[0]); 588 if (cmd_len < ATAPI_MIN_CDB_BYTES) 589 cmd_len = ATAPI_MIN_CDB_BYTES; 590 591 /* send the command to the device */ 592 hwif->output_data(drive, NULL, rq->cmd, cmd_len); 593 594 /* start the DMA if need be */ 595 if (info->dma) 596 hwif->dma_ops->dma_start(drive); 597 598 return ide_started; 599} 600 601/* 602 * Check the contents of the interrupt reason register from the cdrom 603 * and attempt to recover if there are problems. Returns 0 if everything's 604 * ok; nonzero if the request has been terminated. 605 */ 606static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq, 607 int len, int ireason, int rw) 608{ 609 /* 610 * ireason == 0: the drive wants to receive data from us 611 * ireason == 2: the drive is expecting to transfer data to us 612 */ 613 if (ireason == (!rw << 1)) 614 return 0; 615 else if (ireason == (rw << 1)) { 616 617 /* whoops... */ 618 printk(KERN_ERR "%s: %s: wrong transfer direction!\n", 619 drive->name, __func__); 620 621 ide_pad_transfer(drive, rw, len); 622 } else if (rw == 0 && ireason == 1) { 623 /* 624 * Some drives (ASUS) seem to tell us that status info is 625 * available. Just get it and ignore. 626 */ 627 (void)ide_read_status(drive); 628 return 0; 629 } else { 630 /* drive wants a command packet, or invalid ireason... */ 631 printk(KERN_ERR "%s: %s: bad interrupt reason 0x%02x\n", 632 drive->name, __func__, ireason); 633 } 634 635 if (rq->cmd_type == REQ_TYPE_ATA_PC) 636 rq->cmd_flags |= REQ_FAILED; 637 638 cdrom_end_request(drive, 0); 639 return -1; 640} 641 642/* 643 * Assume that the drive will always provide data in multiples of at least 644 * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise. 645 */ 646static int ide_cd_check_transfer_size(ide_drive_t *drive, int len) 647{ 648 struct cdrom_info *cd = drive->driver_data; 649 650 if ((len % SECTOR_SIZE) == 0) 651 return 0; 652 653 printk(KERN_ERR "%s: %s: Bad transfer size %d\n", 654 drive->name, __func__, len); 655 656 if (cd->cd_flags & IDE_CD_FLAG_LIMIT_NFRAMES) 657 printk(KERN_ERR " This drive is not supported by " 658 "this version of the driver\n"); 659 else { 660 printk(KERN_ERR " Trying to limit transfer sizes\n"); 661 cd->cd_flags |= IDE_CD_FLAG_LIMIT_NFRAMES; 662 } 663 664 return 1; 665} 666 667static ide_startstop_t cdrom_newpc_intr(ide_drive_t *); 668 669/* 670 * Routine to send a read/write packet command to the drive. This is usually 671 * called directly from cdrom_start_{read,write}(). However, for drq_interrupt 672 * devices, it is called from an interrupt when the drive is ready to accept 673 * the command. 674 */ 675static ide_startstop_t cdrom_start_rw_cont(ide_drive_t *drive) 676{ 677 struct request *rq = HWGROUP(drive)->rq; 678 679 if (rq_data_dir(rq) == READ) { 680 unsigned short sectors_per_frame = 681 queue_hardsect_size(drive->queue) >> SECTOR_BITS; 682 int nskip = rq->sector & (sectors_per_frame - 1); 683 684 /* 685 * If the requested sector doesn't start on a frame boundary, 686 * we must adjust the start of the transfer so that it does, 687 * and remember to skip the first few sectors. 688 * 689 * If the rq->current_nr_sectors field is larger than the size 690 * of the buffer, it will mean that we're to skip a number of 691 * sectors equal to the amount by which rq->current_nr_sectors 692 * is larger than the buffer size. 693 */ 694 if (nskip > 0) { 695 /* sanity check... */ 696 if (rq->current_nr_sectors != 697 bio_cur_sectors(rq->bio)) { 698 printk(KERN_ERR "%s: %s: buffer botch (%u)\n", 699 drive->name, __func__, 700 rq->current_nr_sectors); 701 cdrom_end_request(drive, 0); 702 return ide_stopped; 703 } 704 rq->current_nr_sectors += nskip; 705 } 706 } 707#if 0 708 else 709 /* the immediate bit */ 710 rq->cmd[1] = 1 << 3; 711#endif 712 /* set up the command */ 713 rq->timeout = ATAPI_WAIT_PC; 714 715 /* send the command to the drive and return */ 716 return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr); 717} 718 719#define IDECD_SEEK_THRESHOLD (1000) /* 1000 blocks */ 720#define IDECD_SEEK_TIMER (5 * WAIT_MIN_SLEEP) /* 100 ms */ 721#define IDECD_SEEK_TIMEOUT (2 * WAIT_CMD) /* 20 sec */ 722 723static ide_startstop_t cdrom_seek_intr(ide_drive_t *drive) 724{ 725 struct cdrom_info *info = drive->driver_data; 726 int stat; 727 static int retry = 10; 728 729 if (cdrom_decode_status(drive, 0, &stat)) 730 return ide_stopped; 731 732 info->cd_flags |= IDE_CD_FLAG_SEEKING; 733 734 if (retry && time_after(jiffies, info->start_seek + IDECD_SEEK_TIMER)) { 735 if (--retry == 0) 736 drive->dsc_overlap = 0; 737 } 738 return ide_stopped; 739} 740 741static ide_startstop_t cdrom_start_seek_continuation(ide_drive_t *drive) 742{ 743 struct request *rq = HWGROUP(drive)->rq; 744 sector_t frame = rq->sector; 745 746 sector_div(frame, queue_hardsect_size(drive->queue) >> SECTOR_BITS); 747 748 memset(rq->cmd, 0, BLK_MAX_CDB); 749 rq->cmd[0] = GPCMD_SEEK; 750 put_unaligned(cpu_to_be32(frame), (unsigned int *) &rq->cmd[2]); 751 752 rq->timeout = ATAPI_WAIT_PC; 753 return cdrom_transfer_packet_command(drive, rq, &cdrom_seek_intr); 754} 755 756static ide_startstop_t cdrom_start_seek(ide_drive_t *drive, unsigned int block) 757{ 758 struct cdrom_info *info = drive->driver_data; 759 760 info->dma = 0; 761 info->start_seek = jiffies; 762 return cdrom_start_packet_command(drive, 0, 763 cdrom_start_seek_continuation); 764} 765 766/* 767 * Fix up a possibly partially-processed request so that we can start it over 768 * entirely, or even put it back on the request queue. 769 */ 770static void restore_request(struct request *rq) 771{ 772 if (rq->buffer != bio_data(rq->bio)) { 773 sector_t n = 774 (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE; 775 776 rq->buffer = bio_data(rq->bio); 777 rq->nr_sectors += n; 778 rq->sector -= n; 779 } 780 rq->current_nr_sectors = bio_cur_sectors(rq->bio); 781 rq->hard_cur_sectors = rq->current_nr_sectors; 782 rq->hard_nr_sectors = rq->nr_sectors; 783 rq->hard_sector = rq->sector; 784 rq->q->prep_rq_fn(rq->q, rq); 785} 786 787/* 788 * All other packet commands. 789 */ 790static void ide_cd_request_sense_fixup(struct request *rq) 791{ 792 /* 793 * Some of the trailing request sense fields are optional, 794 * and some drives don't send them. Sigh. 795 */ 796 if (rq->cmd[0] == GPCMD_REQUEST_SENSE && 797 rq->data_len > 0 && rq->data_len <= 5) 798 while (rq->data_len > 0) { 799 *(u8 *)rq->data++ = 0; 800 --rq->data_len; 801 } 802} 803 804int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd, 805 int write, void *buffer, unsigned *bufflen, 806 struct request_sense *sense, int timeout, 807 unsigned int cmd_flags) 808{ 809 struct cdrom_info *info = drive->driver_data; 810 struct request_sense local_sense; 811 int retries = 10; 812 unsigned int flags = 0; 813 814 if (!sense) 815 sense = &local_sense; 816 817 /* start of retry loop */ 818 do { 819 struct request *rq; 820 int error; 821 822 rq = blk_get_request(drive->queue, write, __GFP_WAIT); 823 824 memcpy(rq->cmd, cmd, BLK_MAX_CDB); 825 rq->cmd_type = REQ_TYPE_ATA_PC; 826 rq->sense = sense; 827 rq->cmd_flags |= cmd_flags; 828 rq->timeout = timeout; 829 if (buffer) { 830 rq->data = buffer; 831 rq->data_len = *bufflen; 832 } 833 834 error = blk_execute_rq(drive->queue, info->disk, rq, 0); 835 836 if (buffer) 837 *bufflen = rq->data_len; 838 839 flags = rq->cmd_flags; 840 blk_put_request(rq); 841 842 /* 843 * FIXME: we should probably abort/retry or something in case of 844 * failure. 845 */ 846 if (flags & REQ_FAILED) { 847 /* 848 * The request failed. Retry if it was due to a unit 849 * attention status (usually means media was changed). 850 */ 851 struct request_sense *reqbuf = sense; 852 853 if (reqbuf->sense_key == UNIT_ATTENTION) 854 cdrom_saw_media_change(drive); 855 else if (reqbuf->sense_key == NOT_READY && 856 reqbuf->asc == 4 && reqbuf->ascq != 4) { 857 /* 858 * The drive is in the process of loading 859 * a disk. Retry, but wait a little to give 860 * the drive time to complete the load. 861 */ 862 ssleep(2); 863 } else { 864 /* otherwise, don't retry */ 865 retries = 0; 866 } 867 --retries; 868 } 869 870 /* end of retry loop */ 871 } while ((flags & REQ_FAILED) && retries >= 0); 872 873 /* return an error if the command failed */ 874 return (flags & REQ_FAILED) ? -EIO : 0; 875} 876 877/* 878 * Called from blk_end_request_callback() after the data of the request is 879 * completed and before the request itself is completed. By returning value '1', 880 * blk_end_request_callback() returns immediately without completing it. 881 */ 882static int cdrom_newpc_intr_dummy_cb(struct request *rq) 883{ 884 return 1; 885} 886 887static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive) 888{ 889 ide_hwif_t *hwif = drive->hwif; 890 struct cdrom_info *info = drive->driver_data; 891 struct request *rq = HWGROUP(drive)->rq; 892 xfer_func_t *xferfunc; 893 ide_expiry_t *expiry = NULL; 894 int dma_error = 0, dma, stat, ireason, len, thislen, uptodate = 0; 895 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0; 896 unsigned int timeout; 897 u8 lowcyl, highcyl; 898 899 /* check for errors */ 900 dma = info->dma; 901 if (dma) { 902 info->dma = 0; 903 dma_error = hwif->dma_ops->dma_end(drive); 904 if (dma_error) { 905 printk(KERN_ERR "%s: DMA %s error\n", drive->name, 906 write ? "write" : "read"); 907 ide_dma_off(drive); 908 } 909 } 910 911 if (cdrom_decode_status(drive, 0, &stat)) 912 return ide_stopped; 913 914 /* using dma, transfer is complete now */ 915 if (dma) { 916 if (dma_error) 917 return ide_error(drive, "dma error", stat); 918 if (blk_fs_request(rq)) { 919 ide_end_request(drive, 1, rq->nr_sectors); 920 return ide_stopped; 921 } 922 goto end_request; 923 } 924 925 /* ok we fall to pio :/ */ 926 ireason = hwif->INB(hwif->io_ports.nsect_addr) & 0x3; 927 lowcyl = hwif->INB(hwif->io_ports.lbam_addr); 928 highcyl = hwif->INB(hwif->io_ports.lbah_addr); 929 930 len = lowcyl + (256 * highcyl); 931 932 thislen = blk_fs_request(rq) ? len : rq->data_len; 933 if (thislen > len) 934 thislen = len; 935 936 /* If DRQ is clear, the command has completed. */ 937 if ((stat & DRQ_STAT) == 0) { 938 if (blk_fs_request(rq)) { 939 /* 940 * If we're not done reading/writing, complain. 941 * Otherwise, complete the command normally. 942 */ 943 uptodate = 1; 944 if (rq->current_nr_sectors > 0) { 945 printk(KERN_ERR "%s: %s: data underrun " 946 "(%d blocks)\n", 947 drive->name, __func__, 948 rq->current_nr_sectors); 949 if (!write) 950 rq->cmd_flags |= REQ_FAILED; 951 uptodate = 0; 952 } 953 cdrom_end_request(drive, uptodate); 954 return ide_stopped; 955 } else if (!blk_pc_request(rq)) { 956 ide_cd_request_sense_fixup(rq); 957 /* complain if we still have data left to transfer */ 958 uptodate = rq->data_len ? 0 : 1; 959 } 960 goto end_request; 961 } 962 963 /* check which way to transfer data */ 964 if (ide_cd_check_ireason(drive, rq, len, ireason, write)) 965 return ide_stopped; 966 967 if (blk_fs_request(rq)) { 968 if (write == 0) { 969 int nskip; 970 971 if (ide_cd_check_transfer_size(drive, len)) { 972 cdrom_end_request(drive, 0); 973 return ide_stopped; 974 } 975 976 /* 977 * First, figure out if we need to bit-bucket 978 * any of the leading sectors. 979 */ 980 nskip = min_t(int, rq->current_nr_sectors 981 - bio_cur_sectors(rq->bio), 982 thislen >> 9); 983 if (nskip > 0) { 984 ide_pad_transfer(drive, write, nskip << 9); 985 rq->current_nr_sectors -= nskip; 986 thislen -= (nskip << 9); 987 } 988 } 989 } 990 991 if (ireason == 0) { 992 write = 1; 993 xferfunc = hwif->output_data; 994 } else { 995 write = 0; 996 xferfunc = hwif->input_data; 997 } 998 999 /* transfer data */ 1000 while (thislen > 0) { 1001 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data; 1002 int blen = rq->data_len; 1003 1004 /* bio backed? */ 1005 if (rq->bio) { 1006 if (blk_fs_request(rq)) { 1007 ptr = rq->buffer; 1008 blen = rq->current_nr_sectors << 9; 1009 } else { 1010 ptr = bio_data(rq->bio); 1011 blen = bio_iovec(rq->bio)->bv_len; 1012 } 1013 } 1014 1015 if (!ptr) { 1016 if (blk_fs_request(rq) && !write) 1017 /* 1018 * If the buffers are full, pipe the rest into 1019 * oblivion. 1020 */ 1021 ide_pad_transfer(drive, 0, thislen); 1022 else { 1023 printk(KERN_ERR "%s: confused, missing data\n", 1024 drive->name); 1025 blk_dump_rq_flags(rq, rq_data_dir(rq) 1026 ? "cdrom_newpc_intr, write" 1027 : "cdrom_newpc_intr, read"); 1028 } 1029 break; 1030 } 1031 1032 if (blen > thislen) 1033 blen = thislen; 1034 1035 xferfunc(drive, NULL, ptr, blen); 1036 1037 thislen -= blen; 1038 len -= blen; 1039 1040 if (blk_fs_request(rq)) { 1041 rq->buffer += blen; 1042 rq->nr_sectors -= (blen >> 9); 1043 rq->current_nr_sectors -= (blen >> 9); 1044 rq->sector += (blen >> 9); 1045 1046 if (rq->current_nr_sectors == 0 && rq->nr_sectors) 1047 cdrom_end_request(drive, 1); 1048 } else { 1049 rq->data_len -= blen; 1050 1051 /* 1052 * The request can't be completed until DRQ is cleared. 1053 * So complete the data, but don't complete the request 1054 * using the dummy function for the callback feature 1055 * of blk_end_request_callback(). 1056 */ 1057 if (rq->bio) 1058 blk_end_request_callback(rq, 0, blen, 1059 cdrom_newpc_intr_dummy_cb); 1060 else 1061 rq->data += blen; 1062 } 1063 if (!write && blk_sense_request(rq)) 1064 rq->sense_len += blen; 1065 } 1066 1067 /* pad, if necessary */ 1068 if (!blk_fs_request(rq) && len > 0) 1069 ide_pad_transfer(drive, write, len); 1070 1071 if (blk_pc_request(rq)) { 1072 timeout = rq->timeout; 1073 } else { 1074 timeout = ATAPI_WAIT_PC; 1075 if (!blk_fs_request(rq)) 1076 expiry = cdrom_timer_expiry; 1077 } 1078 1079 ide_set_handler(drive, cdrom_newpc_intr, timeout, expiry); 1080 return ide_started; 1081 1082end_request: 1083 if (blk_pc_request(rq)) { 1084 unsigned long flags; 1085 unsigned int dlen = rq->data_len; 1086 1087 if (dma) 1088 rq->data_len = 0; 1089 1090 spin_lock_irqsave(&ide_lock, flags); 1091 if (__blk_end_request(rq, 0, dlen)) 1092 BUG(); 1093 HWGROUP(drive)->rq = NULL; 1094 spin_unlock_irqrestore(&ide_lock, flags); 1095 } else { 1096 if (!uptodate) 1097 rq->cmd_flags |= REQ_FAILED; 1098 cdrom_end_request(drive, uptodate); 1099 } 1100 return ide_stopped; 1101} 1102 1103static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq) 1104{ 1105 struct cdrom_info *cd = drive->driver_data; 1106 int write = rq_data_dir(rq) == WRITE; 1107 unsigned short sectors_per_frame = 1108 queue_hardsect_size(drive->queue) >> SECTOR_BITS; 1109 1110 if (write) { 1111 /* disk has become write protected */ 1112 if (cd->disk->policy) { 1113 cdrom_end_request(drive, 0); 1114 return ide_stopped; 1115 } 1116 } else { 1117 /* 1118 * We may be retrying this request after an error. Fix up any 1119 * weirdness which might be present in the request packet. 1120 */ 1121 restore_request(rq); 1122 } 1123 1124 /* use DMA, if possible / writes *must* be hardware frame aligned */ 1125 if ((rq->nr_sectors & (sectors_per_frame - 1)) || 1126 (rq->sector & (sectors_per_frame - 1))) { 1127 if (write) { 1128 cdrom_end_request(drive, 0); 1129 return ide_stopped; 1130 } 1131 cd->dma = 0; 1132 } else 1133 cd->dma = drive->using_dma; 1134 1135 if (write) 1136 cd->devinfo.media_written = 1; 1137 1138 /* start sending the read/write request to the drive */ 1139 return cdrom_start_packet_command(drive, 32768, cdrom_start_rw_cont); 1140} 1141 1142static ide_startstop_t cdrom_do_newpc_cont(ide_drive_t *drive) 1143{ 1144 struct request *rq = HWGROUP(drive)->rq; 1145 1146 if (!rq->timeout) 1147 rq->timeout = ATAPI_WAIT_PC; 1148 1149 return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr); 1150} 1151 1152static ide_startstop_t cdrom_do_block_pc(ide_drive_t *drive, struct request *rq) 1153{ 1154 struct cdrom_info *info = drive->driver_data; 1155 1156 if (blk_pc_request(rq)) 1157 rq->cmd_flags |= REQ_QUIET; 1158 else 1159 rq->cmd_flags &= ~REQ_FAILED; 1160 1161 info->dma = 0; 1162 1163 /* sg request */ 1164 if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) { 1165 struct request_queue *q = drive->queue; 1166 unsigned int alignment; 1167 unsigned long addr; 1168 unsigned long stack_mask = ~(THREAD_SIZE - 1); 1169 1170 if (rq->bio) 1171 addr = (unsigned long)bio_data(rq->bio); 1172 else 1173 addr = (unsigned long)rq->data; 1174 1175 info->dma = drive->using_dma; 1176 1177 /* 1178 * check if dma is safe 1179 * 1180 * NOTE! The "len" and "addr" checks should possibly have 1181 * separate masks. 1182 */ 1183 alignment = queue_dma_alignment(q) | q->dma_pad_mask; 1184 if (addr & alignment || rq->data_len & alignment) 1185 info->dma = 0; 1186 1187 if (!((addr & stack_mask) ^ 1188 ((unsigned long)current->stack & stack_mask))) 1189 info->dma = 0; 1190 } 1191 1192 /* start sending the command to the drive */ 1193 return cdrom_start_packet_command(drive, rq->data_len, 1194 cdrom_do_newpc_cont); 1195} 1196 1197/* 1198 * cdrom driver request routine. 1199 */ 1200static ide_startstop_t ide_do_rw_cdrom(ide_drive_t *drive, struct request *rq, 1201 sector_t block) 1202{ 1203 ide_startstop_t action; 1204 struct cdrom_info *info = drive->driver_data; 1205 1206 if (blk_fs_request(rq)) { 1207 if (info->cd_flags & IDE_CD_FLAG_SEEKING) { 1208 unsigned long elapsed = jiffies - info->start_seek; 1209 int stat = ide_read_status(drive); 1210 1211 if ((stat & SEEK_STAT) != SEEK_STAT) { 1212 if (elapsed < IDECD_SEEK_TIMEOUT) { 1213 ide_stall_queue(drive, 1214 IDECD_SEEK_TIMER); 1215 return ide_stopped; 1216 } 1217 printk(KERN_ERR "%s: DSC timeout\n", 1218 drive->name); 1219 } 1220 info->cd_flags &= ~IDE_CD_FLAG_SEEKING; 1221 } 1222 if (rq_data_dir(rq) == READ && 1223 IDE_LARGE_SEEK(info->last_block, block, 1224 IDECD_SEEK_THRESHOLD) && 1225 drive->dsc_overlap) 1226 action = cdrom_start_seek(drive, block); 1227 else 1228 action = cdrom_start_rw(drive, rq); 1229 info->last_block = block; 1230 return action; 1231 } else if (blk_sense_request(rq) || blk_pc_request(rq) || 1232 rq->cmd_type == REQ_TYPE_ATA_PC) { 1233 return cdrom_do_block_pc(drive, rq); 1234 } else if (blk_special_request(rq)) { 1235 /* right now this can only be a reset... */ 1236 cdrom_end_request(drive, 1); 1237 return ide_stopped; 1238 } 1239 1240 blk_dump_rq_flags(rq, "ide-cd bad flags"); 1241 cdrom_end_request(drive, 0); 1242 return ide_stopped; 1243} 1244 1245 1246 1247/* 1248 * Ioctl handling. 1249 * 1250 * Routines which queue packet commands take as a final argument a pointer to a 1251 * request_sense struct. If execution of the command results in an error with a 1252 * CHECK CONDITION status, this structure will be filled with the results of the 1253 * subsequent request sense command. The pointer can also be NULL, in which case 1254 * no sense information is returned. 1255 */ 1256static void msf_from_bcd(struct atapi_msf *msf) 1257{ 1258 msf->minute = BCD2BIN(msf->minute); 1259 msf->second = BCD2BIN(msf->second); 1260 msf->frame = BCD2BIN(msf->frame); 1261} 1262 1263int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense) 1264{ 1265 struct cdrom_info *info = drive->driver_data; 1266 struct cdrom_device_info *cdi = &info->devinfo; 1267 unsigned char cmd[BLK_MAX_CDB]; 1268 1269 memset(cmd, 0, BLK_MAX_CDB); 1270 cmd[0] = GPCMD_TEST_UNIT_READY; 1271 1272 /* 1273 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs 1274 * instead of supporting the LOAD_UNLOAD opcode. 1275 */ 1276 cmd[7] = cdi->sanyo_slot % 3; 1277 1278 return ide_cd_queue_pc(drive, cmd, 0, NULL, 0, sense, 0, REQ_QUIET); 1279} 1280 1281static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity, 1282 unsigned long *sectors_per_frame, 1283 struct request_sense *sense) 1284{ 1285 struct { 1286 __u32 lba; 1287 __u32 blocklen; 1288 } capbuf; 1289 1290 int stat; 1291 unsigned char cmd[BLK_MAX_CDB]; 1292 unsigned len = sizeof(capbuf); 1293 1294 memset(cmd, 0, BLK_MAX_CDB); 1295 cmd[0] = GPCMD_READ_CDVD_CAPACITY; 1296 1297 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0, 1298 REQ_QUIET); 1299 if (stat == 0) { 1300 *capacity = 1 + be32_to_cpu(capbuf.lba); 1301 *sectors_per_frame = 1302 be32_to_cpu(capbuf.blocklen) >> SECTOR_BITS; 1303 } 1304 1305 return stat; 1306} 1307 1308static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag, 1309 int format, char *buf, int buflen, 1310 struct request_sense *sense) 1311{ 1312 unsigned char cmd[BLK_MAX_CDB]; 1313 1314 memset(cmd, 0, BLK_MAX_CDB); 1315 1316 cmd[0] = GPCMD_READ_TOC_PMA_ATIP; 1317 cmd[6] = trackno; 1318 cmd[7] = (buflen >> 8); 1319 cmd[8] = (buflen & 0xff); 1320 cmd[9] = (format << 6); 1321 1322 if (msf_flag) 1323 cmd[1] = 2; 1324 1325 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET); 1326} 1327 1328/* Try to read the entire TOC for the disk into our internal buffer. */ 1329int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense) 1330{ 1331 int stat, ntracks, i; 1332 struct cdrom_info *info = drive->driver_data; 1333 struct cdrom_device_info *cdi = &info->devinfo; 1334 struct atapi_toc *toc = info->toc; 1335 struct { 1336 struct atapi_toc_header hdr; 1337 struct atapi_toc_entry ent; 1338 } ms_tmp; 1339 long last_written; 1340 unsigned long sectors_per_frame = SECTORS_PER_FRAME; 1341 1342 if (toc == NULL) { 1343 /* try to allocate space */ 1344 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL); 1345 if (toc == NULL) { 1346 printk(KERN_ERR "%s: No cdrom TOC buffer!\n", 1347 drive->name); 1348 return -ENOMEM; 1349 } 1350 info->toc = toc; 1351 } 1352 1353 /* 1354 * Check to see if the existing data is still valid. If it is, 1355 * just return. 1356 */ 1357 (void) cdrom_check_status(drive, sense); 1358 1359 if (info->cd_flags & IDE_CD_FLAG_TOC_VALID) 1360 return 0; 1361 1362 /* try to get the total cdrom capacity and sector size */ 1363 stat = cdrom_read_capacity(drive, &toc->capacity, §ors_per_frame, 1364 sense); 1365 if (stat) 1366 toc->capacity = 0x1fffff; 1367 1368 set_capacity(info->disk, toc->capacity * sectors_per_frame); 1369 /* save a private copy of the TOC capacity for error handling */ 1370 drive->probed_capacity = toc->capacity * sectors_per_frame; 1371 1372 blk_queue_hardsect_size(drive->queue, 1373 sectors_per_frame << SECTOR_BITS); 1374 1375 /* first read just the header, so we know how long the TOC is */ 1376 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr, 1377 sizeof(struct atapi_toc_header), sense); 1378 if (stat) 1379 return stat; 1380 1381 if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) { 1382 toc->hdr.first_track = BCD2BIN(toc->hdr.first_track); 1383 toc->hdr.last_track = BCD2BIN(toc->hdr.last_track); 1384 } 1385 1386 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1; 1387 if (ntracks <= 0) 1388 return -EIO; 1389 if (ntracks > MAX_TRACKS) 1390 ntracks = MAX_TRACKS; 1391 1392 /* now read the whole schmeer */ 1393 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0, 1394 (char *)&toc->hdr, 1395 sizeof(struct atapi_toc_header) + 1396 (ntracks + 1) * 1397 sizeof(struct atapi_toc_entry), sense); 1398 1399 if (stat && toc->hdr.first_track > 1) { 1400 /* 1401 * Cds with CDI tracks only don't have any TOC entries, despite 1402 * of this the returned values are 1403 * first_track == last_track = number of CDI tracks + 1, 1404 * so that this case is indistinguishable from the same layout 1405 * plus an additional audio track. If we get an error for the 1406 * regular case, we assume a CDI without additional audio 1407 * tracks. In this case the readable TOC is empty (CDI tracks 1408 * are not included) and only holds the Leadout entry. 1409 * 1410 * Heiko Eißfeldt. 1411 */ 1412 ntracks = 0; 1413 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0, 1414 (char *)&toc->hdr, 1415 sizeof(struct atapi_toc_header) + 1416 (ntracks + 1) * 1417 sizeof(struct atapi_toc_entry), 1418 sense); 1419 if (stat) 1420 return stat; 1421 1422 if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) { 1423 toc->hdr.first_track = (u8)BIN2BCD(CDROM_LEADOUT); 1424 toc->hdr.last_track = (u8)BIN2BCD(CDROM_LEADOUT); 1425 } else { 1426 toc->hdr.first_track = CDROM_LEADOUT; 1427 toc->hdr.last_track = CDROM_LEADOUT; 1428 } 1429 } 1430 1431 if (stat) 1432 return stat; 1433 1434 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length); 1435 1436 if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) { 1437 toc->hdr.first_track = BCD2BIN(toc->hdr.first_track); 1438 toc->hdr.last_track = BCD2BIN(toc->hdr.last_track); 1439 } 1440 1441 for (i = 0; i <= ntracks; i++) { 1442 if (info->cd_flags & IDE_CD_FLAG_TOCADDR_AS_BCD) { 1443 if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) 1444 toc->ent[i].track = BCD2BIN(toc->ent[i].track); 1445 msf_from_bcd(&toc->ent[i].addr.msf); 1446 } 1447 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute, 1448 toc->ent[i].addr.msf.second, 1449 toc->ent[i].addr.msf.frame); 1450 } 1451 1452 if (toc->hdr.first_track != CDROM_LEADOUT) { 1453 /* read the multisession information */ 1454 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp, 1455 sizeof(ms_tmp), sense); 1456 if (stat) 1457 return stat; 1458 1459 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba); 1460 } else { 1461 ms_tmp.hdr.last_track = CDROM_LEADOUT; 1462 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track; 1463 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */ 1464 } 1465 1466 if (info->cd_flags & IDE_CD_FLAG_TOCADDR_AS_BCD) { 1467 /* re-read multisession information using MSF format */ 1468 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp, 1469 sizeof(ms_tmp), sense); 1470 if (stat) 1471 return stat; 1472 1473 msf_from_bcd(&ms_tmp.ent.addr.msf); 1474 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute, 1475 ms_tmp.ent.addr.msf.second, 1476 ms_tmp.ent.addr.msf.frame); 1477 } 1478 1479 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track); 1480 1481 /* now try to get the total cdrom capacity */ 1482 stat = cdrom_get_last_written(cdi, &last_written); 1483 if (!stat && (last_written > toc->capacity)) { 1484 toc->capacity = last_written; 1485 set_capacity(info->disk, toc->capacity * sectors_per_frame); 1486 drive->probed_capacity = toc->capacity * sectors_per_frame; 1487 } 1488 1489 /* Remember that we've read this stuff. */ 1490 info->cd_flags |= IDE_CD_FLAG_TOC_VALID; 1491 1492 return 0; 1493} 1494 1495int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf) 1496{ 1497 struct cdrom_info *info = drive->driver_data; 1498 struct cdrom_device_info *cdi = &info->devinfo; 1499 struct packet_command cgc; 1500 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE; 1501 1502 if ((info->cd_flags & IDE_CD_FLAG_FULL_CAPS_PAGE) == 0) 1503 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE; 1504 1505 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN); 1506 do { 1507 /* we seem to get stat=0x01,err=0x00 the first time (??) */ 1508 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0); 1509 if (!stat) 1510 break; 1511 } while (--attempts); 1512 return stat; 1513} 1514 1515void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf) 1516{ 1517 struct cdrom_info *cd = drive->driver_data; 1518 u16 curspeed, maxspeed; 1519 1520 curspeed = *(u16 *)&buf[8 + 14]; 1521 maxspeed = *(u16 *)&buf[8 + 8]; 1522 1523 if (cd->cd_flags & IDE_CD_FLAG_LE_SPEED_FIELDS) { 1524 curspeed = le16_to_cpu(curspeed); 1525 maxspeed = le16_to_cpu(maxspeed); 1526 } else { 1527 curspeed = be16_to_cpu(curspeed); 1528 maxspeed = be16_to_cpu(maxspeed); 1529 } 1530 1531 cd->current_speed = (curspeed + (176/2)) / 176; 1532 cd->max_speed = (maxspeed + (176/2)) / 176; 1533} 1534 1535#define IDE_CD_CAPABILITIES \ 1536 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \ 1537 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \ 1538 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \ 1539 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \ 1540 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM) 1541 1542static struct cdrom_device_ops ide_cdrom_dops = { 1543 .open = ide_cdrom_open_real, 1544 .release = ide_cdrom_release_real, 1545 .drive_status = ide_cdrom_drive_status, 1546 .media_changed = ide_cdrom_check_media_change_real, 1547 .tray_move = ide_cdrom_tray_move, 1548 .lock_door = ide_cdrom_lock_door, 1549 .select_speed = ide_cdrom_select_speed, 1550 .get_last_session = ide_cdrom_get_last_session, 1551 .get_mcn = ide_cdrom_get_mcn, 1552 .reset = ide_cdrom_reset, 1553 .audio_ioctl = ide_cdrom_audio_ioctl, 1554 .capability = IDE_CD_CAPABILITIES, 1555 .generic_packet = ide_cdrom_packet, 1556}; 1557 1558static int ide_cdrom_register(ide_drive_t *drive, int nslots) 1559{ 1560 struct cdrom_info *info = drive->driver_data; 1561 struct cdrom_device_info *devinfo = &info->devinfo; 1562 1563 devinfo->ops = &ide_cdrom_dops; 1564 devinfo->speed = info->current_speed; 1565 devinfo->capacity = nslots; 1566 devinfo->handle = drive; 1567 strcpy(devinfo->name, drive->name); 1568 1569 if (info->cd_flags & IDE_CD_FLAG_NO_SPEED_SELECT) 1570 devinfo->mask |= CDC_SELECT_SPEED; 1571 1572 devinfo->disk = info->disk; 1573 return register_cdrom(devinfo); 1574} 1575 1576static int ide_cdrom_probe_capabilities(ide_drive_t *drive) 1577{ 1578 struct cdrom_info *cd = drive->driver_data; 1579 struct cdrom_device_info *cdi = &cd->devinfo; 1580 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE]; 1581 mechtype_t mechtype; 1582 int nslots = 1; 1583 1584 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R | 1585 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO | 1586 CDC_MO_DRIVE | CDC_RAM); 1587 1588 if (drive->media == ide_optical) { 1589 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM); 1590 printk(KERN_ERR "%s: ATAPI magneto-optical drive\n", 1591 drive->name); 1592 return nslots; 1593 } 1594 1595 if (cd->cd_flags & IDE_CD_FLAG_PRE_ATAPI12) { 1596 cd->cd_flags &= ~IDE_CD_FLAG_NO_EJECT; 1597 cdi->mask &= ~CDC_PLAY_AUDIO; 1598 return nslots; 1599 } 1600 1601 /* 1602 * We have to cheat a little here. the packet will eventually be queued 1603 * with ide_cdrom_packet(), which extracts the drive from cdi->handle. 1604 * Since this device hasn't been registered with the Uniform layer yet, 1605 * it can't do this. Same goes for cdi->ops. 1606 */ 1607 cdi->handle = drive; 1608 cdi->ops = &ide_cdrom_dops; 1609 1610 if (ide_cdrom_get_capabilities(drive, buf)) 1611 return 0; 1612 1613 if ((buf[8 + 6] & 0x01) == 0) 1614 cd->cd_flags |= IDE_CD_FLAG_NO_DOORLOCK; 1615 if (buf[8 + 6] & 0x08) 1616 cd->cd_flags &= ~IDE_CD_FLAG_NO_EJECT; 1617 if (buf[8 + 3] & 0x01) 1618 cdi->mask &= ~CDC_CD_R; 1619 if (buf[8 + 3] & 0x02) 1620 cdi->mask &= ~(CDC_CD_RW | CDC_RAM); 1621 if (buf[8 + 2] & 0x38) 1622 cdi->mask &= ~CDC_DVD; 1623 if (buf[8 + 3] & 0x20) 1624 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM); 1625 if (buf[8 + 3] & 0x10) 1626 cdi->mask &= ~CDC_DVD_R; 1627 if ((buf[8 + 4] & 0x01) || (cd->cd_flags & IDE_CD_FLAG_PLAY_AUDIO_OK)) 1628 cdi->mask &= ~CDC_PLAY_AUDIO; 1629 1630 mechtype = buf[8 + 6] >> 5; 1631 if (mechtype == mechtype_caddy || mechtype == mechtype_popup) 1632 cdi->mask |= CDC_CLOSE_TRAY; 1633 1634 if (cdi->sanyo_slot > 0) { 1635 cdi->mask &= ~CDC_SELECT_DISC; 1636 nslots = 3; 1637 } else if (mechtype == mechtype_individual_changer || 1638 mechtype == mechtype_cartridge_changer) { 1639 nslots = cdrom_number_of_slots(cdi); 1640 if (nslots > 1) 1641 cdi->mask &= ~CDC_SELECT_DISC; 1642 } 1643 1644 ide_cdrom_update_speed(drive, buf); 1645 1646 printk(KERN_INFO "%s: ATAPI", drive->name); 1647 1648 /* don't print speed if the drive reported 0 */ 1649 if (cd->max_speed) 1650 printk(KERN_CONT " %dX", cd->max_speed); 1651 1652 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM"); 1653 1654 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0) 1655 printk(KERN_CONT " DVD%s%s", 1656 (cdi->mask & CDC_DVD_R) ? "" : "-R", 1657 (cdi->mask & CDC_DVD_RAM) ? "" : "-RAM"); 1658 1659 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0) 1660 printk(KERN_CONT " CD%s%s", 1661 (cdi->mask & CDC_CD_R) ? "" : "-R", 1662 (cdi->mask & CDC_CD_RW) ? "" : "/RW"); 1663 1664 if ((cdi->mask & CDC_SELECT_DISC) == 0) 1665 printk(KERN_CONT " changer w/%d slots", nslots); 1666 else 1667 printk(KERN_CONT " drive"); 1668 1669 printk(KERN_CONT ", %dkB Cache\n", be16_to_cpu(*(u16 *)&buf[8 + 12])); 1670 1671 return nslots; 1672} 1673 1674/* standard prep_rq_fn that builds 10 byte cmds */ 1675static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq) 1676{ 1677 int hard_sect = queue_hardsect_size(q); 1678 long block = (long)rq->hard_sector / (hard_sect >> 9); 1679 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9); 1680 1681 memset(rq->cmd, 0, BLK_MAX_CDB); 1682 1683 if (rq_data_dir(rq) == READ) 1684 rq->cmd[0] = GPCMD_READ_10; 1685 else 1686 rq->cmd[0] = GPCMD_WRITE_10; 1687 1688 /* 1689 * fill in lba 1690 */ 1691 rq->cmd[2] = (block >> 24) & 0xff; 1692 rq->cmd[3] = (block >> 16) & 0xff; 1693 rq->cmd[4] = (block >> 8) & 0xff; 1694 rq->cmd[5] = block & 0xff; 1695 1696 /* 1697 * and transfer length 1698 */ 1699 rq->cmd[7] = (blocks >> 8) & 0xff; 1700 rq->cmd[8] = blocks & 0xff; 1701 rq->cmd_len = 10; 1702 return BLKPREP_OK; 1703} 1704 1705/* 1706 * Most of the SCSI commands are supported directly by ATAPI devices. 1707 * This transform handles the few exceptions. 1708 */ 1709static int ide_cdrom_prep_pc(struct request *rq) 1710{ 1711 u8 *c = rq->cmd; 1712 1713 /* transform 6-byte read/write commands to the 10-byte version */ 1714 if (c[0] == READ_6 || c[0] == WRITE_6) { 1715 c[8] = c[4]; 1716 c[5] = c[3]; 1717 c[4] = c[2]; 1718 c[3] = c[1] & 0x1f; 1719 c[2] = 0; 1720 c[1] &= 0xe0; 1721 c[0] += (READ_10 - READ_6); 1722 rq->cmd_len = 10; 1723 return BLKPREP_OK; 1724 } 1725 1726 /* 1727 * it's silly to pretend we understand 6-byte sense commands, just 1728 * reject with ILLEGAL_REQUEST and the caller should take the 1729 * appropriate action 1730 */ 1731 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) { 1732 rq->errors = ILLEGAL_REQUEST; 1733 return BLKPREP_KILL; 1734 } 1735 1736 return BLKPREP_OK; 1737} 1738 1739static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq) 1740{ 1741 if (blk_fs_request(rq)) 1742 return ide_cdrom_prep_fs(q, rq); 1743 else if (blk_pc_request(rq)) 1744 return ide_cdrom_prep_pc(rq); 1745 1746 return 0; 1747} 1748 1749struct cd_list_entry { 1750 const char *id_model; 1751 const char *id_firmware; 1752 unsigned int cd_flags; 1753}; 1754 1755#ifdef CONFIG_IDE_PROC_FS 1756static sector_t ide_cdrom_capacity(ide_drive_t *drive) 1757{ 1758 unsigned long capacity, sectors_per_frame; 1759 1760 if (cdrom_read_capacity(drive, &capacity, §ors_per_frame, NULL)) 1761 return 0; 1762 1763 return capacity * sectors_per_frame; 1764} 1765 1766static int proc_idecd_read_capacity(char *page, char **start, off_t off, 1767 int count, int *eof, void *data) 1768{ 1769 ide_drive_t *drive = data; 1770 int len; 1771 1772 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive)); 1773 PROC_IDE_READ_RETURN(page, start, off, count, eof, len); 1774} 1775 1776static ide_proc_entry_t idecd_proc[] = { 1777 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL }, 1778 { NULL, 0, NULL, NULL } 1779}; 1780 1781static void ide_cdrom_add_settings(ide_drive_t *drive) 1782{ 1783 ide_add_setting(drive, "dsc_overlap", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1, 1784 &drive->dsc_overlap, NULL); 1785} 1786#else 1787static inline void ide_cdrom_add_settings(ide_drive_t *drive) { ; } 1788#endif 1789 1790static const struct cd_list_entry ide_cd_quirks_list[] = { 1791 /* Limit transfer size per interrupt. */ 1792 { "SAMSUNG CD-ROM SCR-2430", NULL, IDE_CD_FLAG_LIMIT_NFRAMES }, 1793 { "SAMSUNG CD-ROM SCR-2432", NULL, IDE_CD_FLAG_LIMIT_NFRAMES }, 1794 /* SCR-3231 doesn't support the SET_CD_SPEED command. */ 1795 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_CD_FLAG_NO_SPEED_SELECT }, 1796 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */ 1797 { "NEC CD-ROM DRIVE:260", "1.01", IDE_CD_FLAG_TOCADDR_AS_BCD | 1798 IDE_CD_FLAG_PRE_ATAPI12, }, 1799 /* Vertos 300, some versions of this drive like to talk BCD. */ 1800 { "V003S0DS", NULL, IDE_CD_FLAG_VERTOS_300_SSD, }, 1801 /* Vertos 600 ESD. */ 1802 { "V006E0DS", NULL, IDE_CD_FLAG_VERTOS_600_ESD, }, 1803 /* 1804 * Sanyo 3 CD changer uses a non-standard command for CD changing 1805 * (by default standard ATAPI support for CD changers is used). 1806 */ 1807 { "CD-ROM CDR-C3 G", NULL, IDE_CD_FLAG_SANYO_3CD }, 1808 { "CD-ROM CDR-C3G", NULL, IDE_CD_FLAG_SANYO_3CD }, 1809 { "CD-ROM CDR_C36", NULL, IDE_CD_FLAG_SANYO_3CD }, 1810 /* Stingray 8X CD-ROM. */ 1811 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_CD_FLAG_PRE_ATAPI12}, 1812 /* 1813 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length 1814 * mode sense page capabilities size, but older drives break. 1815 */ 1816 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_CD_FLAG_FULL_CAPS_PAGE }, 1817 { "WPI CDS-32X", NULL, IDE_CD_FLAG_FULL_CAPS_PAGE }, 1818 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */ 1819 { "", "241N", IDE_CD_FLAG_LE_SPEED_FIELDS }, 1820 /* 1821 * Some drives used by Apple don't advertise audio play 1822 * but they do support reading TOC & audio datas. 1823 */ 1824 { "MATSHITADVD-ROM SR-8187", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK }, 1825 { "MATSHITADVD-ROM SR-8186", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK }, 1826 { "MATSHITADVD-ROM SR-8176", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK }, 1827 { "MATSHITADVD-ROM SR-8174", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK }, 1828 { "Optiarc DVD RW AD-5200A", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK }, 1829 { NULL, NULL, 0 } 1830}; 1831 1832static unsigned int ide_cd_flags(struct hd_driveid *id) 1833{ 1834 const struct cd_list_entry *cle = ide_cd_quirks_list; 1835 1836 while (cle->id_model) { 1837 if (strcmp(cle->id_model, id->model) == 0 && 1838 (cle->id_firmware == NULL || 1839 strstr(id->fw_rev, cle->id_firmware))) 1840 return cle->cd_flags; 1841 cle++; 1842 } 1843 1844 return 0; 1845} 1846 1847static int ide_cdrom_setup(ide_drive_t *drive) 1848{ 1849 struct cdrom_info *cd = drive->driver_data; 1850 struct cdrom_device_info *cdi = &cd->devinfo; 1851 struct hd_driveid *id = drive->id; 1852 int nslots; 1853 1854 blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn); 1855 blk_queue_dma_alignment(drive->queue, 31); 1856 blk_queue_update_dma_pad(drive->queue, 15); 1857 drive->queue->unplug_delay = (1 * HZ) / 1000; 1858 if (!drive->queue->unplug_delay) 1859 drive->queue->unplug_delay = 1; 1860 1861 drive->special.all = 0; 1862 1863 cd->cd_flags = IDE_CD_FLAG_MEDIA_CHANGED | IDE_CD_FLAG_NO_EJECT | 1864 ide_cd_flags(id); 1865 1866 if ((id->config & 0x0060) == 0x20) 1867 cd->cd_flags |= IDE_CD_FLAG_DRQ_INTERRUPT; 1868 1869 if ((cd->cd_flags & IDE_CD_FLAG_VERTOS_300_SSD) && 1870 id->fw_rev[4] == '1' && id->fw_rev[6] <= '2') 1871 cd->cd_flags |= (IDE_CD_FLAG_TOCTRACKS_AS_BCD | 1872 IDE_CD_FLAG_TOCADDR_AS_BCD); 1873 else if ((cd->cd_flags & IDE_CD_FLAG_VERTOS_600_ESD) && 1874 id->fw_rev[4] == '1' && id->fw_rev[6] <= '2') 1875 cd->cd_flags |= IDE_CD_FLAG_TOCTRACKS_AS_BCD; 1876 else if (cd->cd_flags & IDE_CD_FLAG_SANYO_3CD) 1877 /* 3 => use CD in slot 0 */ 1878 cdi->sanyo_slot = 3; 1879 1880 nslots = ide_cdrom_probe_capabilities(drive); 1881 1882 /* set correct block size */ 1883 blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE); 1884 1885 drive->dsc_overlap = (drive->next != drive); 1886 1887 if (ide_cdrom_register(drive, nslots)) { 1888 printk(KERN_ERR "%s: %s failed to register device with the" 1889 " cdrom driver.\n", drive->name, __func__); 1890 cd->devinfo.handle = NULL; 1891 return 1; 1892 } 1893 ide_cdrom_add_settings(drive); 1894 return 0; 1895} 1896 1897static void ide_cd_remove(ide_drive_t *drive) 1898{ 1899 struct cdrom_info *info = drive->driver_data; 1900 1901 ide_proc_unregister_driver(drive, info->driver); 1902 1903 del_gendisk(info->disk); 1904 1905 ide_cd_put(info); 1906} 1907 1908static void ide_cd_release(struct kref *kref) 1909{ 1910 struct cdrom_info *info = to_ide_cd(kref); 1911 struct cdrom_device_info *devinfo = &info->devinfo; 1912 ide_drive_t *drive = info->drive; 1913 struct gendisk *g = info->disk; 1914 1915 kfree(info->toc); 1916 if (devinfo->handle == drive) 1917 unregister_cdrom(devinfo); 1918 drive->dsc_overlap = 0; 1919 drive->driver_data = NULL; 1920 blk_queue_prep_rq(drive->queue, NULL); 1921 g->private_data = NULL; 1922 put_disk(g); 1923 kfree(info); 1924} 1925 1926static int ide_cd_probe(ide_drive_t *); 1927 1928static ide_driver_t ide_cdrom_driver = { 1929 .gen_driver = { 1930 .owner = THIS_MODULE, 1931 .name = "ide-cdrom", 1932 .bus = &ide_bus_type, 1933 }, 1934 .probe = ide_cd_probe, 1935 .remove = ide_cd_remove, 1936 .version = IDECD_VERSION, 1937 .media = ide_cdrom, 1938 .supports_dsc_overlap = 1, 1939 .do_request = ide_do_rw_cdrom, 1940 .end_request = ide_end_request, 1941 .error = __ide_error, 1942 .abort = __ide_abort, 1943#ifdef CONFIG_IDE_PROC_FS 1944 .proc = idecd_proc, 1945#endif 1946}; 1947 1948static int idecd_open(struct inode *inode, struct file *file) 1949{ 1950 struct gendisk *disk = inode->i_bdev->bd_disk; 1951 struct cdrom_info *info; 1952 int rc = -ENOMEM; 1953 1954 info = ide_cd_get(disk); 1955 if (!info) 1956 return -ENXIO; 1957 1958 rc = cdrom_open(&info->devinfo, inode, file); 1959 1960 if (rc < 0) 1961 ide_cd_put(info); 1962 1963 return rc; 1964} 1965 1966static int idecd_release(struct inode *inode, struct file *file) 1967{ 1968 struct gendisk *disk = inode->i_bdev->bd_disk; 1969 struct cdrom_info *info = ide_cd_g(disk); 1970 1971 cdrom_release(&info->devinfo, file); 1972 1973 ide_cd_put(info); 1974 1975 return 0; 1976} 1977 1978static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg) 1979{ 1980 struct packet_command cgc; 1981 char buffer[16]; 1982 int stat; 1983 char spindown; 1984 1985 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char))) 1986 return -EFAULT; 1987 1988 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN); 1989 1990 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0); 1991 if (stat) 1992 return stat; 1993 1994 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f); 1995 return cdrom_mode_select(cdi, &cgc); 1996} 1997 1998static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg) 1999{ 2000 struct packet_command cgc; 2001 char buffer[16]; 2002 int stat; 2003 char spindown; 2004 2005 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN); 2006 2007 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0); 2008 if (stat) 2009 return stat; 2010 2011 spindown = buffer[11] & 0x0f; 2012 if (copy_to_user((void __user *)arg, &spindown, sizeof(char))) 2013 return -EFAULT; 2014 return 0; 2015} 2016 2017static int idecd_ioctl(struct inode *inode, struct file *file, 2018 unsigned int cmd, unsigned long arg) 2019{ 2020 struct block_device *bdev = inode->i_bdev; 2021 struct cdrom_info *info = ide_cd_g(bdev->bd_disk); 2022 int err; 2023 2024 switch (cmd) { 2025 case CDROMSETSPINDOWN: 2026 return idecd_set_spindown(&info->devinfo, arg); 2027 case CDROMGETSPINDOWN: 2028 return idecd_get_spindown(&info->devinfo, arg); 2029 default: 2030 break; 2031 } 2032 2033 err = generic_ide_ioctl(info->drive, file, bdev, cmd, arg); 2034 if (err == -EINVAL) 2035 err = cdrom_ioctl(file, &info->devinfo, inode, cmd, arg); 2036 2037 return err; 2038} 2039 2040static int idecd_media_changed(struct gendisk *disk) 2041{ 2042 struct cdrom_info *info = ide_cd_g(disk); 2043 return cdrom_media_changed(&info->devinfo); 2044} 2045 2046static int idecd_revalidate_disk(struct gendisk *disk) 2047{ 2048 struct cdrom_info *info = ide_cd_g(disk); 2049 struct request_sense sense; 2050 2051 ide_cd_read_toc(info->drive, &sense); 2052 2053 return 0; 2054} 2055 2056static struct block_device_operations idecd_ops = { 2057 .owner = THIS_MODULE, 2058 .open = idecd_open, 2059 .release = idecd_release, 2060 .ioctl = idecd_ioctl, 2061 .media_changed = idecd_media_changed, 2062 .revalidate_disk = idecd_revalidate_disk 2063}; 2064 2065/* module options */ 2066static char *ignore; 2067 2068module_param(ignore, charp, 0400); 2069MODULE_DESCRIPTION("ATAPI CD-ROM Driver"); 2070 2071static int ide_cd_probe(ide_drive_t *drive) 2072{ 2073 struct cdrom_info *info; 2074 struct gendisk *g; 2075 struct request_sense sense; 2076 2077 if (!strstr("ide-cdrom", drive->driver_req)) 2078 goto failed; 2079 if (!drive->present) 2080 goto failed; 2081 if (drive->media != ide_cdrom && drive->media != ide_optical) 2082 goto failed; 2083 /* skip drives that we were told to ignore */ 2084 if (ignore != NULL) { 2085 if (strstr(ignore, drive->name)) { 2086 printk(KERN_INFO "ide-cd: ignoring drive %s\n", 2087 drive->name); 2088 goto failed; 2089 } 2090 } 2091 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL); 2092 if (info == NULL) { 2093 printk(KERN_ERR "%s: Can't allocate a cdrom structure\n", 2094 drive->name); 2095 goto failed; 2096 } 2097 2098 g = alloc_disk(1 << PARTN_BITS); 2099 if (!g) 2100 goto out_free_cd; 2101 2102 ide_init_disk(g, drive); 2103 2104 ide_proc_register_driver(drive, &ide_cdrom_driver); 2105 2106 kref_init(&info->kref); 2107 2108 info->drive = drive; 2109 info->driver = &ide_cdrom_driver; 2110 info->disk = g; 2111 2112 g->private_data = &info->driver; 2113 2114 drive->driver_data = info; 2115 2116 g->minors = 1; 2117 g->driverfs_dev = &drive->gendev; 2118 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE; 2119 if (ide_cdrom_setup(drive)) { 2120 ide_proc_unregister_driver(drive, &ide_cdrom_driver); 2121 ide_cd_release(&info->kref); 2122 goto failed; 2123 } 2124 2125 ide_cd_read_toc(drive, &sense); 2126 g->fops = &idecd_ops; 2127 g->flags |= GENHD_FL_REMOVABLE; 2128 add_disk(g); 2129 return 0; 2130 2131out_free_cd: 2132 kfree(info); 2133failed: 2134 return -ENODEV; 2135} 2136 2137static void __exit ide_cdrom_exit(void) 2138{ 2139 driver_unregister(&ide_cdrom_driver.gen_driver); 2140} 2141 2142static int __init ide_cdrom_init(void) 2143{ 2144 return driver_register(&ide_cdrom_driver.gen_driver); 2145} 2146 2147MODULE_ALIAS("ide:*m-cdrom*"); 2148MODULE_ALIAS("ide-cd"); 2149module_init(ide_cdrom_init); 2150module_exit(ide_cdrom_exit); 2151MODULE_LICENSE("GPL"); 2152