ide-cd.c revision 5aeddf907f149cae7e19b7c23ccea3823d00698c
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 55static void ide_cd_release(struct kref *); 56 57static struct cdrom_info *ide_cd_get(struct gendisk *disk) 58{ 59 struct cdrom_info *cd = NULL; 60 61 mutex_lock(&idecd_ref_mutex); 62 cd = ide_drv_g(disk, cdrom_info); 63 if (cd) { 64 if (ide_device_get(cd->drive)) 65 cd = NULL; 66 else 67 kref_get(&cd->kref); 68 69 } 70 mutex_unlock(&idecd_ref_mutex); 71 return cd; 72} 73 74static void ide_cd_put(struct cdrom_info *cd) 75{ 76 ide_drive_t *drive = cd->drive; 77 78 mutex_lock(&idecd_ref_mutex); 79 kref_put(&cd->kref, ide_cd_release); 80 ide_device_put(drive); 81 mutex_unlock(&idecd_ref_mutex); 82} 83 84/* 85 * Generic packet command support and error handling routines. 86 */ 87 88/* Mark that we've seen a media change and invalidate our internal buffers. */ 89static void cdrom_saw_media_change(ide_drive_t *drive) 90{ 91 drive->atapi_flags |= IDE_AFLAG_MEDIA_CHANGED; 92 drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID; 93} 94 95static int cdrom_log_sense(ide_drive_t *drive, struct request *rq, 96 struct request_sense *sense) 97{ 98 int log = 0; 99 100 if (!sense || !rq || (rq->cmd_flags & REQ_QUIET)) 101 return 0; 102 103 switch (sense->sense_key) { 104 case NO_SENSE: 105 case RECOVERED_ERROR: 106 break; 107 case NOT_READY: 108 /* 109 * don't care about tray state messages for e.g. capacity 110 * commands or in-progress or becoming ready 111 */ 112 if (sense->asc == 0x3a || sense->asc == 0x04) 113 break; 114 log = 1; 115 break; 116 case ILLEGAL_REQUEST: 117 /* 118 * don't log START_STOP unit with LoEj set, since we cannot 119 * reliably check if drive can auto-close 120 */ 121 if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24) 122 break; 123 log = 1; 124 break; 125 case UNIT_ATTENTION: 126 /* 127 * Make good and sure we've seen this potential media change. 128 * Some drives (i.e. Creative) fail to present the correct sense 129 * key in the error register. 130 */ 131 cdrom_saw_media_change(drive); 132 break; 133 default: 134 log = 1; 135 break; 136 } 137 return log; 138} 139 140static void cdrom_analyze_sense_data(ide_drive_t *drive, 141 struct request *failed_command, 142 struct request_sense *sense) 143{ 144 unsigned long sector; 145 unsigned long bio_sectors; 146 struct cdrom_info *info = drive->driver_data; 147 148 if (!cdrom_log_sense(drive, failed_command, sense)) 149 return; 150 151 /* 152 * If a read toc is executed for a CD-R or CD-RW medium where the first 153 * toc has not been recorded yet, it will fail with 05/24/00 (which is a 154 * confusing error) 155 */ 156 if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP) 157 if (sense->sense_key == 0x05 && sense->asc == 0x24) 158 return; 159 160 /* current error */ 161 if (sense->error_code == 0x70) { 162 switch (sense->sense_key) { 163 case MEDIUM_ERROR: 164 case VOLUME_OVERFLOW: 165 case ILLEGAL_REQUEST: 166 if (!sense->valid) 167 break; 168 if (failed_command == NULL || 169 !blk_fs_request(failed_command)) 170 break; 171 sector = (sense->information[0] << 24) | 172 (sense->information[1] << 16) | 173 (sense->information[2] << 8) | 174 (sense->information[3]); 175 176 if (drive->queue->hardsect_size == 2048) 177 /* device sector size is 2K */ 178 sector <<= 2; 179 180 bio_sectors = max(bio_sectors(failed_command->bio), 4U); 181 sector &= ~(bio_sectors - 1); 182 183 if (sector < get_capacity(info->disk) && 184 drive->probed_capacity - sector < 4 * 75) 185 set_capacity(info->disk, sector); 186 } 187 } 188 189 ide_cd_log_error(drive->name, failed_command, sense); 190} 191 192static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense, 193 struct request *failed_command) 194{ 195 struct cdrom_info *info = drive->driver_data; 196 struct request *rq = &info->request_sense_request; 197 198 if (sense == NULL) 199 sense = &info->sense_data; 200 201 /* stuff the sense request in front of our current request */ 202 blk_rq_init(NULL, rq); 203 rq->cmd_type = REQ_TYPE_ATA_PC; 204 rq->rq_disk = info->disk; 205 206 rq->data = sense; 207 rq->cmd[0] = GPCMD_REQUEST_SENSE; 208 rq->cmd[4] = 18; 209 rq->data_len = 18; 210 211 rq->cmd_type = REQ_TYPE_SENSE; 212 rq->cmd_flags |= REQ_PREEMPT; 213 214 /* NOTE! Save the failed command in "rq->buffer" */ 215 rq->buffer = (void *) failed_command; 216 217 ide_do_drive_cmd(drive, rq); 218} 219 220static void cdrom_end_request(ide_drive_t *drive, int uptodate) 221{ 222 struct request *rq = HWGROUP(drive)->rq; 223 int nsectors = rq->hard_cur_sectors; 224 225 if (blk_sense_request(rq) && uptodate) { 226 /* 227 * For REQ_TYPE_SENSE, "rq->buffer" points to the original 228 * failed request 229 */ 230 struct request *failed = (struct request *) rq->buffer; 231 struct cdrom_info *info = drive->driver_data; 232 void *sense = &info->sense_data; 233 unsigned long flags; 234 235 if (failed) { 236 if (failed->sense) { 237 sense = failed->sense; 238 failed->sense_len = rq->sense_len; 239 } 240 cdrom_analyze_sense_data(drive, failed, sense); 241 /* 242 * now end the failed request 243 */ 244 if (blk_fs_request(failed)) { 245 if (ide_end_dequeued_request(drive, failed, 0, 246 failed->hard_nr_sectors)) 247 BUG(); 248 } else { 249 spin_lock_irqsave(&ide_lock, flags); 250 if (__blk_end_request(failed, -EIO, 251 failed->data_len)) 252 BUG(); 253 spin_unlock_irqrestore(&ide_lock, flags); 254 } 255 } else 256 cdrom_analyze_sense_data(drive, NULL, sense); 257 } 258 259 if (!rq->current_nr_sectors && blk_fs_request(rq)) 260 uptodate = 1; 261 /* make sure it's fully ended */ 262 if (blk_pc_request(rq)) 263 nsectors = (rq->data_len + 511) >> 9; 264 if (!nsectors) 265 nsectors = 1; 266 267 ide_end_request(drive, uptodate, nsectors); 268} 269 270static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 st) 271{ 272 if (st & 0x80) 273 return; 274 ide_dump_status(drive, msg, st); 275} 276 277/* 278 * Returns: 279 * 0: if the request should be continued. 280 * 1: if the request was ended. 281 */ 282static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret) 283{ 284 ide_hwif_t *hwif = drive->hwif; 285 struct request *rq = hwif->hwgroup->rq; 286 int stat, err, sense_key; 287 288 /* check for errors */ 289 stat = hwif->tp_ops->read_status(hwif); 290 291 if (stat_ret) 292 *stat_ret = stat; 293 294 if (OK_STAT(stat, good_stat, BAD_R_STAT)) 295 return 0; 296 297 /* get the IDE error register */ 298 err = ide_read_error(drive); 299 sense_key = err >> 4; 300 301 if (rq == NULL) { 302 printk(KERN_ERR "%s: missing rq in %s\n", 303 drive->name, __func__); 304 return 1; 305 } 306 307 if (blk_sense_request(rq)) { 308 /* 309 * We got an error trying to get sense info from the drive 310 * (probably while trying to recover from a former error). 311 * Just give up. 312 */ 313 rq->cmd_flags |= REQ_FAILED; 314 cdrom_end_request(drive, 0); 315 ide_error(drive, "request sense failure", stat); 316 return 1; 317 318 } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) { 319 /* All other functions, except for READ. */ 320 321 /* 322 * if we have an error, pass back CHECK_CONDITION as the 323 * scsi status byte 324 */ 325 if (blk_pc_request(rq) && !rq->errors) 326 rq->errors = SAM_STAT_CHECK_CONDITION; 327 328 /* check for tray open */ 329 if (sense_key == NOT_READY) { 330 cdrom_saw_media_change(drive); 331 } else if (sense_key == UNIT_ATTENTION) { 332 /* check for media change */ 333 cdrom_saw_media_change(drive); 334 return 0; 335 } else if (sense_key == ILLEGAL_REQUEST && 336 rq->cmd[0] == GPCMD_START_STOP_UNIT) { 337 /* 338 * Don't print error message for this condition-- 339 * SFF8090i indicates that 5/24/00 is the correct 340 * response to a request to close the tray if the 341 * drive doesn't have that capability. 342 * cdrom_log_sense() knows this! 343 */ 344 } else if (!(rq->cmd_flags & REQ_QUIET)) { 345 /* otherwise, print an error */ 346 ide_dump_status(drive, "packet command error", stat); 347 } 348 349 rq->cmd_flags |= REQ_FAILED; 350 351 /* 352 * instead of playing games with moving completions around, 353 * remove failed request completely and end it when the 354 * request sense has completed 355 */ 356 goto end_request; 357 358 } else if (blk_fs_request(rq)) { 359 int do_end_request = 0; 360 361 /* handle errors from READ and WRITE requests */ 362 363 if (blk_noretry_request(rq)) 364 do_end_request = 1; 365 366 if (sense_key == NOT_READY) { 367 /* tray open */ 368 if (rq_data_dir(rq) == READ) { 369 cdrom_saw_media_change(drive); 370 371 /* fail the request */ 372 printk(KERN_ERR "%s: tray open\n", drive->name); 373 do_end_request = 1; 374 } else { 375 struct cdrom_info *info = drive->driver_data; 376 377 /* 378 * Allow the drive 5 seconds to recover, some 379 * devices will return this error while flushing 380 * data from cache. 381 */ 382 if (!rq->errors) 383 info->write_timeout = jiffies + 384 ATAPI_WAIT_WRITE_BUSY; 385 rq->errors = 1; 386 if (time_after(jiffies, info->write_timeout)) 387 do_end_request = 1; 388 else { 389 unsigned long flags; 390 391 /* 392 * take a breather relying on the unplug 393 * timer to kick us again 394 */ 395 spin_lock_irqsave(&ide_lock, flags); 396 blk_plug_device(drive->queue); 397 spin_unlock_irqrestore(&ide_lock, 398 flags); 399 return 1; 400 } 401 } 402 } else if (sense_key == UNIT_ATTENTION) { 403 /* media change */ 404 cdrom_saw_media_change(drive); 405 406 /* 407 * Arrange to retry the request but be sure to give up 408 * if we've retried too many times. 409 */ 410 if (++rq->errors > ERROR_MAX) 411 do_end_request = 1; 412 } else if (sense_key == ILLEGAL_REQUEST || 413 sense_key == DATA_PROTECT) { 414 /* 415 * No point in retrying after an illegal request or data 416 * protect error. 417 */ 418 ide_dump_status_no_sense(drive, "command error", stat); 419 do_end_request = 1; 420 } else if (sense_key == MEDIUM_ERROR) { 421 /* 422 * No point in re-trying a zillion times on a bad 423 * sector. If we got here the error is not correctable. 424 */ 425 ide_dump_status_no_sense(drive, 426 "media error (bad sector)", 427 stat); 428 do_end_request = 1; 429 } else if (sense_key == BLANK_CHECK) { 430 /* disk appears blank ?? */ 431 ide_dump_status_no_sense(drive, "media error (blank)", 432 stat); 433 do_end_request = 1; 434 } else if ((err & ~ATA_ABORTED) != 0) { 435 /* go to the default handler for other errors */ 436 ide_error(drive, "cdrom_decode_status", stat); 437 return 1; 438 } else if ((++rq->errors > ERROR_MAX)) { 439 /* we've racked up too many retries, abort */ 440 do_end_request = 1; 441 } 442 443 /* 444 * End a request through request sense analysis when we have 445 * sense data. We need this in order to perform end of media 446 * processing. 447 */ 448 if (do_end_request) 449 goto end_request; 450 451 /* 452 * If we got a CHECK_CONDITION status, queue 453 * a request sense command. 454 */ 455 if (stat & ATA_ERR) 456 cdrom_queue_request_sense(drive, NULL, NULL); 457 } else { 458 blk_dump_rq_flags(rq, "ide-cd: bad rq"); 459 cdrom_end_request(drive, 0); 460 } 461 462 /* retry, or handle the next request */ 463 return 1; 464 465end_request: 466 if (stat & ATA_ERR) { 467 unsigned long flags; 468 469 spin_lock_irqsave(&ide_lock, flags); 470 blkdev_dequeue_request(rq); 471 HWGROUP(drive)->rq = NULL; 472 spin_unlock_irqrestore(&ide_lock, flags); 473 474 cdrom_queue_request_sense(drive, rq->sense, rq); 475 } else 476 cdrom_end_request(drive, 0); 477 478 return 1; 479} 480 481static int cdrom_timer_expiry(ide_drive_t *drive) 482{ 483 struct request *rq = HWGROUP(drive)->rq; 484 unsigned long wait = 0; 485 486 /* 487 * Some commands are *slow* and normally take a long time to complete. 488 * Usually we can use the ATAPI "disconnect" to bypass this, but not all 489 * commands/drives support that. Let ide_timer_expiry keep polling us 490 * for these. 491 */ 492 switch (rq->cmd[0]) { 493 case GPCMD_BLANK: 494 case GPCMD_FORMAT_UNIT: 495 case GPCMD_RESERVE_RZONE_TRACK: 496 case GPCMD_CLOSE_TRACK: 497 case GPCMD_FLUSH_CACHE: 498 wait = ATAPI_WAIT_PC; 499 break; 500 default: 501 if (!(rq->cmd_flags & REQ_QUIET)) 502 printk(KERN_INFO "ide-cd: cmd 0x%x timed out\n", 503 rq->cmd[0]); 504 wait = 0; 505 break; 506 } 507 return wait; 508} 509 510/* 511 * Set up the device registers for transferring a packet command on DEV, 512 * expecting to later transfer XFERLEN bytes. HANDLER is the routine 513 * which actually transfers the command to the drive. If this is a 514 * drq_interrupt device, this routine will arrange for HANDLER to be 515 * called when the interrupt from the drive arrives. Otherwise, HANDLER 516 * will be called immediately after the drive is prepared for the transfer. 517 */ 518static ide_startstop_t cdrom_start_packet_command(ide_drive_t *drive, 519 int xferlen, 520 ide_handler_t *handler) 521{ 522 struct cdrom_info *info = drive->driver_data; 523 ide_hwif_t *hwif = drive->hwif; 524 525 /* FIXME: for Virtual DMA we must check harder */ 526 if (info->dma) 527 info->dma = !hwif->dma_ops->dma_setup(drive); 528 529 /* set up the controller registers */ 530 ide_pktcmd_tf_load(drive, IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL, 531 xferlen, info->dma); 532 533 if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) { 534 /* waiting for CDB interrupt, not DMA yet. */ 535 if (info->dma) 536 drive->waiting_for_dma = 0; 537 538 /* packet command */ 539 ide_execute_command(drive, ATA_CMD_PACKET, handler, 540 ATAPI_WAIT_PC, cdrom_timer_expiry); 541 return ide_started; 542 } else { 543 ide_execute_pkt_cmd(drive); 544 545 return (*handler) (drive); 546 } 547} 548 549/* 550 * Send a packet command to DRIVE described by CMD_BUF and CMD_LEN. The device 551 * registers must have already been prepared by cdrom_start_packet_command. 552 * HANDLER is the interrupt handler to call when the command completes or 553 * there's data ready. 554 */ 555#define ATAPI_MIN_CDB_BYTES 12 556static ide_startstop_t cdrom_transfer_packet_command(ide_drive_t *drive, 557 struct request *rq, 558 ide_handler_t *handler) 559{ 560 ide_hwif_t *hwif = drive->hwif; 561 int cmd_len; 562 struct cdrom_info *info = drive->driver_data; 563 ide_startstop_t startstop; 564 565 if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) { 566 /* 567 * Here we should have been called after receiving an interrupt 568 * from the device. DRQ should how be set. 569 */ 570 571 /* check for errors */ 572 if (cdrom_decode_status(drive, ATA_DRQ, NULL)) 573 return ide_stopped; 574 575 /* ok, next interrupt will be DMA interrupt */ 576 if (info->dma) 577 drive->waiting_for_dma = 1; 578 } else { 579 /* otherwise, we must wait for DRQ to get set */ 580 if (ide_wait_stat(&startstop, drive, ATA_DRQ, 581 ATA_BUSY, WAIT_READY)) 582 return startstop; 583 } 584 585 /* arm the interrupt handler */ 586 ide_set_handler(drive, handler, rq->timeout, cdrom_timer_expiry); 587 588 /* ATAPI commands get padded out to 12 bytes minimum */ 589 cmd_len = COMMAND_SIZE(rq->cmd[0]); 590 if (cmd_len < ATAPI_MIN_CDB_BYTES) 591 cmd_len = ATAPI_MIN_CDB_BYTES; 592 593 /* send the command to the device */ 594 hwif->tp_ops->output_data(drive, NULL, rq->cmd, cmd_len); 595 596 /* start the DMA if need be */ 597 if (info->dma) 598 hwif->dma_ops->dma_start(drive); 599 600 return ide_started; 601} 602 603/* 604 * Check the contents of the interrupt reason register from the cdrom 605 * and attempt to recover if there are problems. Returns 0 if everything's 606 * ok; nonzero if the request has been terminated. 607 */ 608static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq, 609 int len, int ireason, int rw) 610{ 611 ide_hwif_t *hwif = drive->hwif; 612 613 /* 614 * ireason == 0: the drive wants to receive data from us 615 * ireason == 2: the drive is expecting to transfer data to us 616 */ 617 if (ireason == (!rw << 1)) 618 return 0; 619 else if (ireason == (rw << 1)) { 620 621 /* whoops... */ 622 printk(KERN_ERR "%s: %s: wrong transfer direction!\n", 623 drive->name, __func__); 624 625 ide_pad_transfer(drive, rw, len); 626 } else if (rw == 0 && ireason == 1) { 627 /* 628 * Some drives (ASUS) seem to tell us that status info is 629 * available. Just get it and ignore. 630 */ 631 (void)hwif->tp_ops->read_status(hwif); 632 return 0; 633 } else { 634 /* drive wants a command packet, or invalid ireason... */ 635 printk(KERN_ERR "%s: %s: bad interrupt reason 0x%02x\n", 636 drive->name, __func__, ireason); 637 } 638 639 if (rq->cmd_type == REQ_TYPE_ATA_PC) 640 rq->cmd_flags |= REQ_FAILED; 641 642 cdrom_end_request(drive, 0); 643 return -1; 644} 645 646/* 647 * Assume that the drive will always provide data in multiples of at least 648 * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise. 649 */ 650static int ide_cd_check_transfer_size(ide_drive_t *drive, int len) 651{ 652 if ((len % SECTOR_SIZE) == 0) 653 return 0; 654 655 printk(KERN_ERR "%s: %s: Bad transfer size %d\n", 656 drive->name, __func__, len); 657 658 if (drive->atapi_flags & IDE_AFLAG_LIMIT_NFRAMES) 659 printk(KERN_ERR " This drive is not supported by " 660 "this version of the driver\n"); 661 else { 662 printk(KERN_ERR " Trying to limit transfer sizes\n"); 663 drive->atapi_flags |= IDE_AFLAG_LIMIT_NFRAMES; 664 } 665 666 return 1; 667} 668 669static ide_startstop_t cdrom_newpc_intr(ide_drive_t *); 670 671static ide_startstop_t ide_cd_prepare_rw_request(ide_drive_t *drive, 672 struct request *rq) 673{ 674 if (rq_data_dir(rq) == READ) { 675 unsigned short sectors_per_frame = 676 queue_hardsect_size(drive->queue) >> SECTOR_BITS; 677 int nskip = rq->sector & (sectors_per_frame - 1); 678 679 /* 680 * If the requested sector doesn't start on a frame boundary, 681 * we must adjust the start of the transfer so that it does, 682 * and remember to skip the first few sectors. 683 * 684 * If the rq->current_nr_sectors field is larger than the size 685 * of the buffer, it will mean that we're to skip a number of 686 * sectors equal to the amount by which rq->current_nr_sectors 687 * is larger than the buffer size. 688 */ 689 if (nskip > 0) { 690 /* sanity check... */ 691 if (rq->current_nr_sectors != 692 bio_cur_sectors(rq->bio)) { 693 printk(KERN_ERR "%s: %s: buffer botch (%u)\n", 694 drive->name, __func__, 695 rq->current_nr_sectors); 696 cdrom_end_request(drive, 0); 697 return ide_stopped; 698 } 699 rq->current_nr_sectors += nskip; 700 } 701 } 702#if 0 703 else 704 /* the immediate bit */ 705 rq->cmd[1] = 1 << 3; 706#endif 707 /* set up the command */ 708 rq->timeout = ATAPI_WAIT_PC; 709 710 return ide_started; 711} 712 713/* 714 * Routine to send a read/write packet command to the drive. This is usually 715 * called directly from cdrom_start_{read,write}(). However, for drq_interrupt 716 * devices, it is called from an interrupt when the drive is ready to accept 717 * the command. 718 */ 719static ide_startstop_t cdrom_start_rw_cont(ide_drive_t *drive) 720{ 721 struct request *rq = drive->hwif->hwgroup->rq; 722 723 /* send the command to the drive and return */ 724 return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr); 725} 726 727#define IDECD_SEEK_THRESHOLD (1000) /* 1000 blocks */ 728#define IDECD_SEEK_TIMER (5 * WAIT_MIN_SLEEP) /* 100 ms */ 729#define IDECD_SEEK_TIMEOUT (2 * WAIT_CMD) /* 20 sec */ 730 731static ide_startstop_t cdrom_seek_intr(ide_drive_t *drive) 732{ 733 struct cdrom_info *info = drive->driver_data; 734 int stat; 735 static int retry = 10; 736 737 if (cdrom_decode_status(drive, 0, &stat)) 738 return ide_stopped; 739 740 drive->atapi_flags |= IDE_AFLAG_SEEKING; 741 742 if (retry && time_after(jiffies, info->start_seek + IDECD_SEEK_TIMER)) { 743 if (--retry == 0) 744 drive->dsc_overlap = 0; 745 } 746 return ide_stopped; 747} 748 749static void ide_cd_prepare_seek_request(ide_drive_t *drive, struct request *rq) 750{ 751 sector_t frame = rq->sector; 752 753 sector_div(frame, queue_hardsect_size(drive->queue) >> SECTOR_BITS); 754 755 memset(rq->cmd, 0, BLK_MAX_CDB); 756 rq->cmd[0] = GPCMD_SEEK; 757 put_unaligned(cpu_to_be32(frame), (unsigned int *) &rq->cmd[2]); 758 759 rq->timeout = ATAPI_WAIT_PC; 760} 761 762static ide_startstop_t cdrom_start_seek_continuation(ide_drive_t *drive) 763{ 764 struct request *rq = drive->hwif->hwgroup->rq; 765 766 return cdrom_transfer_packet_command(drive, rq, &cdrom_seek_intr); 767} 768 769/* 770 * Fix up a possibly partially-processed request so that we can start it over 771 * entirely, or even put it back on the request queue. 772 */ 773static void restore_request(struct request *rq) 774{ 775 if (rq->buffer != bio_data(rq->bio)) { 776 sector_t n = 777 (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE; 778 779 rq->buffer = bio_data(rq->bio); 780 rq->nr_sectors += n; 781 rq->sector -= n; 782 } 783 rq->current_nr_sectors = bio_cur_sectors(rq->bio); 784 rq->hard_cur_sectors = rq->current_nr_sectors; 785 rq->hard_nr_sectors = rq->nr_sectors; 786 rq->hard_sector = rq->sector; 787 rq->q->prep_rq_fn(rq->q, rq); 788} 789 790/* 791 * All other packet commands. 792 */ 793static void ide_cd_request_sense_fixup(struct request *rq) 794{ 795 /* 796 * Some of the trailing request sense fields are optional, 797 * and some drives don't send them. Sigh. 798 */ 799 if (rq->cmd[0] == GPCMD_REQUEST_SENSE && 800 rq->data_len > 0 && rq->data_len <= 5) 801 while (rq->data_len > 0) { 802 *(u8 *)rq->data++ = 0; 803 --rq->data_len; 804 } 805} 806 807int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd, 808 int write, void *buffer, unsigned *bufflen, 809 struct request_sense *sense, int timeout, 810 unsigned int cmd_flags) 811{ 812 struct cdrom_info *info = drive->driver_data; 813 struct request_sense local_sense; 814 int retries = 10; 815 unsigned int flags = 0; 816 817 if (!sense) 818 sense = &local_sense; 819 820 /* start of retry loop */ 821 do { 822 struct request *rq; 823 int error; 824 825 rq = blk_get_request(drive->queue, write, __GFP_WAIT); 826 827 memcpy(rq->cmd, cmd, BLK_MAX_CDB); 828 rq->cmd_type = REQ_TYPE_ATA_PC; 829 rq->sense = sense; 830 rq->cmd_flags |= cmd_flags; 831 rq->timeout = timeout; 832 if (buffer) { 833 rq->data = buffer; 834 rq->data_len = *bufflen; 835 } 836 837 error = blk_execute_rq(drive->queue, info->disk, rq, 0); 838 839 if (buffer) 840 *bufflen = rq->data_len; 841 842 flags = rq->cmd_flags; 843 blk_put_request(rq); 844 845 /* 846 * FIXME: we should probably abort/retry or something in case of 847 * failure. 848 */ 849 if (flags & REQ_FAILED) { 850 /* 851 * The request failed. Retry if it was due to a unit 852 * attention status (usually means media was changed). 853 */ 854 struct request_sense *reqbuf = sense; 855 856 if (reqbuf->sense_key == UNIT_ATTENTION) 857 cdrom_saw_media_change(drive); 858 else if (reqbuf->sense_key == NOT_READY && 859 reqbuf->asc == 4 && reqbuf->ascq != 4) { 860 /* 861 * The drive is in the process of loading 862 * a disk. Retry, but wait a little to give 863 * the drive time to complete the load. 864 */ 865 ssleep(2); 866 } else { 867 /* otherwise, don't retry */ 868 retries = 0; 869 } 870 --retries; 871 } 872 873 /* end of retry loop */ 874 } while ((flags & REQ_FAILED) && retries >= 0); 875 876 /* return an error if the command failed */ 877 return (flags & REQ_FAILED) ? -EIO : 0; 878} 879 880/* 881 * Called from blk_end_request_callback() after the data of the request is 882 * completed and before the request itself is completed. By returning value '1', 883 * blk_end_request_callback() returns immediately without completing it. 884 */ 885static int cdrom_newpc_intr_dummy_cb(struct request *rq) 886{ 887 return 1; 888} 889 890static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive) 891{ 892 ide_hwif_t *hwif = drive->hwif; 893 struct cdrom_info *info = drive->driver_data; 894 struct request *rq = HWGROUP(drive)->rq; 895 xfer_func_t *xferfunc; 896 ide_expiry_t *expiry = NULL; 897 int dma_error = 0, dma, stat, thislen, uptodate = 0; 898 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0; 899 unsigned int timeout; 900 u16 len; 901 u8 ireason; 902 903 /* check for errors */ 904 dma = info->dma; 905 if (dma) { 906 info->dma = 0; 907 dma_error = hwif->dma_ops->dma_end(drive); 908 if (dma_error) { 909 printk(KERN_ERR "%s: DMA %s error\n", drive->name, 910 write ? "write" : "read"); 911 ide_dma_off(drive); 912 } 913 } 914 915 if (cdrom_decode_status(drive, 0, &stat)) 916 return ide_stopped; 917 918 /* using dma, transfer is complete now */ 919 if (dma) { 920 if (dma_error) 921 return ide_error(drive, "dma error", stat); 922 if (blk_fs_request(rq)) { 923 ide_end_request(drive, 1, rq->nr_sectors); 924 return ide_stopped; 925 } 926 goto end_request; 927 } 928 929 ide_read_bcount_and_ireason(drive, &len, &ireason); 930 931 thislen = blk_fs_request(rq) ? len : rq->data_len; 932 if (thislen > len) 933 thislen = len; 934 935 /* If DRQ is clear, the command has completed. */ 936 if ((stat & ATA_DRQ) == 0) { 937 if (blk_fs_request(rq)) { 938 /* 939 * If we're not done reading/writing, complain. 940 * Otherwise, complete the command normally. 941 */ 942 uptodate = 1; 943 if (rq->current_nr_sectors > 0) { 944 printk(KERN_ERR "%s: %s: data underrun " 945 "(%d blocks)\n", 946 drive->name, __func__, 947 rq->current_nr_sectors); 948 if (!write) 949 rq->cmd_flags |= REQ_FAILED; 950 uptodate = 0; 951 } 952 cdrom_end_request(drive, uptodate); 953 return ide_stopped; 954 } else if (!blk_pc_request(rq)) { 955 ide_cd_request_sense_fixup(rq); 956 /* complain if we still have data left to transfer */ 957 uptodate = rq->data_len ? 0 : 1; 958 } 959 goto end_request; 960 } 961 962 /* check which way to transfer data */ 963 if (ide_cd_check_ireason(drive, rq, len, ireason, write)) 964 return ide_stopped; 965 966 if (blk_fs_request(rq)) { 967 if (write == 0) { 968 int nskip; 969 970 if (ide_cd_check_transfer_size(drive, len)) { 971 cdrom_end_request(drive, 0); 972 return ide_stopped; 973 } 974 975 /* 976 * First, figure out if we need to bit-bucket 977 * any of the leading sectors. 978 */ 979 nskip = min_t(int, rq->current_nr_sectors 980 - bio_cur_sectors(rq->bio), 981 thislen >> 9); 982 if (nskip > 0) { 983 ide_pad_transfer(drive, write, nskip << 9); 984 rq->current_nr_sectors -= nskip; 985 thislen -= (nskip << 9); 986 } 987 } 988 } 989 990 if (ireason == 0) { 991 write = 1; 992 xferfunc = hwif->tp_ops->output_data; 993 } else { 994 write = 0; 995 xferfunc = hwif->tp_ops->input_data; 996 } 997 998 /* transfer data */ 999 while (thislen > 0) { 1000 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data; 1001 int blen = rq->data_len; 1002 1003 /* bio backed? */ 1004 if (rq->bio) { 1005 if (blk_fs_request(rq)) { 1006 ptr = rq->buffer; 1007 blen = rq->current_nr_sectors << 9; 1008 } else { 1009 ptr = bio_data(rq->bio); 1010 blen = bio_iovec(rq->bio)->bv_len; 1011 } 1012 } 1013 1014 if (!ptr) { 1015 if (blk_fs_request(rq) && !write) 1016 /* 1017 * If the buffers are full, pipe the rest into 1018 * oblivion. 1019 */ 1020 ide_pad_transfer(drive, 0, thislen); 1021 else { 1022 printk(KERN_ERR "%s: confused, missing data\n", 1023 drive->name); 1024 blk_dump_rq_flags(rq, rq_data_dir(rq) 1025 ? "cdrom_newpc_intr, write" 1026 : "cdrom_newpc_intr, read"); 1027 } 1028 break; 1029 } 1030 1031 if (blen > thislen) 1032 blen = thislen; 1033 1034 xferfunc(drive, NULL, ptr, blen); 1035 1036 thislen -= blen; 1037 len -= blen; 1038 1039 if (blk_fs_request(rq)) { 1040 rq->buffer += blen; 1041 rq->nr_sectors -= (blen >> 9); 1042 rq->current_nr_sectors -= (blen >> 9); 1043 rq->sector += (blen >> 9); 1044 1045 if (rq->current_nr_sectors == 0 && rq->nr_sectors) 1046 cdrom_end_request(drive, 1); 1047 } else { 1048 rq->data_len -= blen; 1049 1050 /* 1051 * The request can't be completed until DRQ is cleared. 1052 * So complete the data, but don't complete the request 1053 * using the dummy function for the callback feature 1054 * of blk_end_request_callback(). 1055 */ 1056 if (rq->bio) 1057 blk_end_request_callback(rq, 0, blen, 1058 cdrom_newpc_intr_dummy_cb); 1059 else 1060 rq->data += blen; 1061 } 1062 if (!write && blk_sense_request(rq)) 1063 rq->sense_len += blen; 1064 } 1065 1066 /* pad, if necessary */ 1067 if (!blk_fs_request(rq) && len > 0) 1068 ide_pad_transfer(drive, write, len); 1069 1070 if (blk_pc_request(rq)) { 1071 timeout = rq->timeout; 1072 } else { 1073 timeout = ATAPI_WAIT_PC; 1074 if (!blk_fs_request(rq)) 1075 expiry = cdrom_timer_expiry; 1076 } 1077 1078 ide_set_handler(drive, cdrom_newpc_intr, timeout, expiry); 1079 return ide_started; 1080 1081end_request: 1082 if (blk_pc_request(rq)) { 1083 unsigned long flags; 1084 unsigned int dlen = rq->data_len; 1085 1086 if (dma) 1087 rq->data_len = 0; 1088 1089 spin_lock_irqsave(&ide_lock, flags); 1090 if (__blk_end_request(rq, 0, dlen)) 1091 BUG(); 1092 HWGROUP(drive)->rq = NULL; 1093 spin_unlock_irqrestore(&ide_lock, flags); 1094 } else { 1095 if (!uptodate) 1096 rq->cmd_flags |= REQ_FAILED; 1097 cdrom_end_request(drive, uptodate); 1098 } 1099 return ide_stopped; 1100} 1101 1102static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq) 1103{ 1104 struct cdrom_info *cd = drive->driver_data; 1105 int write = rq_data_dir(rq) == WRITE; 1106 unsigned short sectors_per_frame = 1107 queue_hardsect_size(drive->queue) >> SECTOR_BITS; 1108 1109 if (write) { 1110 /* disk has become write protected */ 1111 if (get_disk_ro(cd->disk)) { 1112 cdrom_end_request(drive, 0); 1113 return ide_stopped; 1114 } 1115 } else { 1116 /* 1117 * We may be retrying this request after an error. Fix up any 1118 * weirdness which might be present in the request packet. 1119 */ 1120 restore_request(rq); 1121 } 1122 1123 /* use DMA, if possible / writes *must* be hardware frame aligned */ 1124 if ((rq->nr_sectors & (sectors_per_frame - 1)) || 1125 (rq->sector & (sectors_per_frame - 1))) { 1126 if (write) { 1127 cdrom_end_request(drive, 0); 1128 return ide_stopped; 1129 } 1130 cd->dma = 0; 1131 } else 1132 cd->dma = drive->using_dma; 1133 1134 if (write) 1135 cd->devinfo.media_written = 1; 1136 1137 return ide_started; 1138} 1139 1140static ide_startstop_t cdrom_do_newpc_cont(ide_drive_t *drive) 1141{ 1142 struct request *rq = HWGROUP(drive)->rq; 1143 1144 return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr); 1145} 1146 1147static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq) 1148{ 1149 struct cdrom_info *info = drive->driver_data; 1150 1151 if (blk_pc_request(rq)) 1152 rq->cmd_flags |= REQ_QUIET; 1153 else 1154 rq->cmd_flags &= ~REQ_FAILED; 1155 1156 info->dma = 0; 1157 1158 /* sg request */ 1159 if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) { 1160 struct request_queue *q = drive->queue; 1161 unsigned int alignment; 1162 char *buf; 1163 1164 if (rq->bio) 1165 buf = bio_data(rq->bio); 1166 else 1167 buf = rq->data; 1168 1169 info->dma = drive->using_dma; 1170 1171 /* 1172 * check if dma is safe 1173 * 1174 * NOTE! The "len" and "addr" checks should possibly have 1175 * separate masks. 1176 */ 1177 alignment = queue_dma_alignment(q) | q->dma_pad_mask; 1178 if ((unsigned long)buf & alignment || rq->data_len & alignment 1179 || object_is_on_stack(buf)) 1180 info->dma = 0; 1181 } 1182} 1183 1184/* 1185 * cdrom driver request routine. 1186 */ 1187static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq, 1188 sector_t block) 1189{ 1190 struct cdrom_info *info = drive->driver_data; 1191 ide_handler_t *fn; 1192 int xferlen; 1193 1194 if (blk_fs_request(rq)) { 1195 if (drive->atapi_flags & IDE_AFLAG_SEEKING) { 1196 ide_hwif_t *hwif = drive->hwif; 1197 unsigned long elapsed = jiffies - info->start_seek; 1198 int stat = hwif->tp_ops->read_status(hwif); 1199 1200 if ((stat & ATA_DSC) != ATA_DSC) { 1201 if (elapsed < IDECD_SEEK_TIMEOUT) { 1202 ide_stall_queue(drive, 1203 IDECD_SEEK_TIMER); 1204 return ide_stopped; 1205 } 1206 printk(KERN_ERR "%s: DSC timeout\n", 1207 drive->name); 1208 } 1209 drive->atapi_flags &= ~IDE_AFLAG_SEEKING; 1210 } 1211 if (rq_data_dir(rq) == READ && 1212 IDE_LARGE_SEEK(info->last_block, block, 1213 IDECD_SEEK_THRESHOLD) && 1214 drive->dsc_overlap) { 1215 xferlen = 0; 1216 fn = cdrom_start_seek_continuation; 1217 1218 info->dma = 0; 1219 info->start_seek = jiffies; 1220 1221 ide_cd_prepare_seek_request(drive, rq); 1222 } else { 1223 xferlen = 32768; 1224 fn = cdrom_start_rw_cont; 1225 1226 if (cdrom_start_rw(drive, rq) == ide_stopped) 1227 return ide_stopped; 1228 1229 if (ide_cd_prepare_rw_request(drive, rq) == ide_stopped) 1230 return ide_stopped; 1231 } 1232 info->last_block = block; 1233 } else if (blk_sense_request(rq) || blk_pc_request(rq) || 1234 rq->cmd_type == REQ_TYPE_ATA_PC) { 1235 xferlen = rq->data_len; 1236 fn = cdrom_do_newpc_cont; 1237 1238 if (!rq->timeout) 1239 rq->timeout = ATAPI_WAIT_PC; 1240 1241 cdrom_do_block_pc(drive, rq); 1242 } else if (blk_special_request(rq)) { 1243 /* right now this can only be a reset... */ 1244 cdrom_end_request(drive, 1); 1245 return ide_stopped; 1246 } else { 1247 blk_dump_rq_flags(rq, "ide-cd bad flags"); 1248 cdrom_end_request(drive, 0); 1249 return ide_stopped; 1250 } 1251 1252 return cdrom_start_packet_command(drive, xferlen, fn); 1253} 1254 1255/* 1256 * Ioctl handling. 1257 * 1258 * Routines which queue packet commands take as a final argument a pointer to a 1259 * request_sense struct. If execution of the command results in an error with a 1260 * CHECK CONDITION status, this structure will be filled with the results of the 1261 * subsequent request sense command. The pointer can also be NULL, in which case 1262 * no sense information is returned. 1263 */ 1264static void msf_from_bcd(struct atapi_msf *msf) 1265{ 1266 msf->minute = bcd2bin(msf->minute); 1267 msf->second = bcd2bin(msf->second); 1268 msf->frame = bcd2bin(msf->frame); 1269} 1270 1271int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense) 1272{ 1273 struct cdrom_info *info = drive->driver_data; 1274 struct cdrom_device_info *cdi = &info->devinfo; 1275 unsigned char cmd[BLK_MAX_CDB]; 1276 1277 memset(cmd, 0, BLK_MAX_CDB); 1278 cmd[0] = GPCMD_TEST_UNIT_READY; 1279 1280 /* 1281 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs 1282 * instead of supporting the LOAD_UNLOAD opcode. 1283 */ 1284 cmd[7] = cdi->sanyo_slot % 3; 1285 1286 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET); 1287} 1288 1289static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity, 1290 unsigned long *sectors_per_frame, 1291 struct request_sense *sense) 1292{ 1293 struct { 1294 __be32 lba; 1295 __be32 blocklen; 1296 } capbuf; 1297 1298 int stat; 1299 unsigned char cmd[BLK_MAX_CDB]; 1300 unsigned len = sizeof(capbuf); 1301 u32 blocklen; 1302 1303 memset(cmd, 0, BLK_MAX_CDB); 1304 cmd[0] = GPCMD_READ_CDVD_CAPACITY; 1305 1306 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0, 1307 REQ_QUIET); 1308 if (stat) 1309 return stat; 1310 1311 /* 1312 * Sanity check the given block size 1313 */ 1314 blocklen = be32_to_cpu(capbuf.blocklen); 1315 switch (blocklen) { 1316 case 512: 1317 case 1024: 1318 case 2048: 1319 case 4096: 1320 break; 1321 default: 1322 printk(KERN_ERR "%s: weird block size %u\n", 1323 drive->name, blocklen); 1324 printk(KERN_ERR "%s: default to 2kb block size\n", 1325 drive->name); 1326 blocklen = 2048; 1327 break; 1328 } 1329 1330 *capacity = 1 + be32_to_cpu(capbuf.lba); 1331 *sectors_per_frame = blocklen >> SECTOR_BITS; 1332 return 0; 1333} 1334 1335static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag, 1336 int format, char *buf, int buflen, 1337 struct request_sense *sense) 1338{ 1339 unsigned char cmd[BLK_MAX_CDB]; 1340 1341 memset(cmd, 0, BLK_MAX_CDB); 1342 1343 cmd[0] = GPCMD_READ_TOC_PMA_ATIP; 1344 cmd[6] = trackno; 1345 cmd[7] = (buflen >> 8); 1346 cmd[8] = (buflen & 0xff); 1347 cmd[9] = (format << 6); 1348 1349 if (msf_flag) 1350 cmd[1] = 2; 1351 1352 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET); 1353} 1354 1355/* Try to read the entire TOC for the disk into our internal buffer. */ 1356int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense) 1357{ 1358 int stat, ntracks, i; 1359 struct cdrom_info *info = drive->driver_data; 1360 struct cdrom_device_info *cdi = &info->devinfo; 1361 struct atapi_toc *toc = info->toc; 1362 struct { 1363 struct atapi_toc_header hdr; 1364 struct atapi_toc_entry ent; 1365 } ms_tmp; 1366 long last_written; 1367 unsigned long sectors_per_frame = SECTORS_PER_FRAME; 1368 1369 if (toc == NULL) { 1370 /* try to allocate space */ 1371 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL); 1372 if (toc == NULL) { 1373 printk(KERN_ERR "%s: No cdrom TOC buffer!\n", 1374 drive->name); 1375 return -ENOMEM; 1376 } 1377 info->toc = toc; 1378 } 1379 1380 /* 1381 * Check to see if the existing data is still valid. If it is, 1382 * just return. 1383 */ 1384 (void) cdrom_check_status(drive, sense); 1385 1386 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID) 1387 return 0; 1388 1389 /* try to get the total cdrom capacity and sector size */ 1390 stat = cdrom_read_capacity(drive, &toc->capacity, §ors_per_frame, 1391 sense); 1392 if (stat) 1393 toc->capacity = 0x1fffff; 1394 1395 set_capacity(info->disk, toc->capacity * sectors_per_frame); 1396 /* save a private copy of the TOC capacity for error handling */ 1397 drive->probed_capacity = toc->capacity * sectors_per_frame; 1398 1399 blk_queue_hardsect_size(drive->queue, 1400 sectors_per_frame << SECTOR_BITS); 1401 1402 /* first read just the header, so we know how long the TOC is */ 1403 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr, 1404 sizeof(struct atapi_toc_header), sense); 1405 if (stat) 1406 return stat; 1407 1408 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1409 toc->hdr.first_track = bcd2bin(toc->hdr.first_track); 1410 toc->hdr.last_track = bcd2bin(toc->hdr.last_track); 1411 } 1412 1413 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1; 1414 if (ntracks <= 0) 1415 return -EIO; 1416 if (ntracks > MAX_TRACKS) 1417 ntracks = MAX_TRACKS; 1418 1419 /* now read the whole schmeer */ 1420 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0, 1421 (char *)&toc->hdr, 1422 sizeof(struct atapi_toc_header) + 1423 (ntracks + 1) * 1424 sizeof(struct atapi_toc_entry), sense); 1425 1426 if (stat && toc->hdr.first_track > 1) { 1427 /* 1428 * Cds with CDI tracks only don't have any TOC entries, despite 1429 * of this the returned values are 1430 * first_track == last_track = number of CDI tracks + 1, 1431 * so that this case is indistinguishable from the same layout 1432 * plus an additional audio track. If we get an error for the 1433 * regular case, we assume a CDI without additional audio 1434 * tracks. In this case the readable TOC is empty (CDI tracks 1435 * are not included) and only holds the Leadout entry. 1436 * 1437 * Heiko Eißfeldt. 1438 */ 1439 ntracks = 0; 1440 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0, 1441 (char *)&toc->hdr, 1442 sizeof(struct atapi_toc_header) + 1443 (ntracks + 1) * 1444 sizeof(struct atapi_toc_entry), 1445 sense); 1446 if (stat) 1447 return stat; 1448 1449 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1450 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT); 1451 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT); 1452 } else { 1453 toc->hdr.first_track = CDROM_LEADOUT; 1454 toc->hdr.last_track = CDROM_LEADOUT; 1455 } 1456 } 1457 1458 if (stat) 1459 return stat; 1460 1461 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length); 1462 1463 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1464 toc->hdr.first_track = bcd2bin(toc->hdr.first_track); 1465 toc->hdr.last_track = bcd2bin(toc->hdr.last_track); 1466 } 1467 1468 for (i = 0; i <= ntracks; i++) { 1469 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) { 1470 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) 1471 toc->ent[i].track = bcd2bin(toc->ent[i].track); 1472 msf_from_bcd(&toc->ent[i].addr.msf); 1473 } 1474 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute, 1475 toc->ent[i].addr.msf.second, 1476 toc->ent[i].addr.msf.frame); 1477 } 1478 1479 if (toc->hdr.first_track != CDROM_LEADOUT) { 1480 /* read the multisession information */ 1481 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp, 1482 sizeof(ms_tmp), sense); 1483 if (stat) 1484 return stat; 1485 1486 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba); 1487 } else { 1488 ms_tmp.hdr.last_track = CDROM_LEADOUT; 1489 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track; 1490 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */ 1491 } 1492 1493 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) { 1494 /* re-read multisession information using MSF format */ 1495 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp, 1496 sizeof(ms_tmp), sense); 1497 if (stat) 1498 return stat; 1499 1500 msf_from_bcd(&ms_tmp.ent.addr.msf); 1501 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute, 1502 ms_tmp.ent.addr.msf.second, 1503 ms_tmp.ent.addr.msf.frame); 1504 } 1505 1506 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track); 1507 1508 /* now try to get the total cdrom capacity */ 1509 stat = cdrom_get_last_written(cdi, &last_written); 1510 if (!stat && (last_written > toc->capacity)) { 1511 toc->capacity = last_written; 1512 set_capacity(info->disk, toc->capacity * sectors_per_frame); 1513 drive->probed_capacity = toc->capacity * sectors_per_frame; 1514 } 1515 1516 /* Remember that we've read this stuff. */ 1517 drive->atapi_flags |= IDE_AFLAG_TOC_VALID; 1518 1519 return 0; 1520} 1521 1522int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf) 1523{ 1524 struct cdrom_info *info = drive->driver_data; 1525 struct cdrom_device_info *cdi = &info->devinfo; 1526 struct packet_command cgc; 1527 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE; 1528 1529 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0) 1530 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE; 1531 1532 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN); 1533 do { 1534 /* we seem to get stat=0x01,err=0x00 the first time (??) */ 1535 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0); 1536 if (!stat) 1537 break; 1538 } while (--attempts); 1539 return stat; 1540} 1541 1542void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf) 1543{ 1544 struct cdrom_info *cd = drive->driver_data; 1545 u16 curspeed, maxspeed; 1546 1547 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) { 1548 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]); 1549 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]); 1550 } else { 1551 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]); 1552 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]); 1553 } 1554 1555 cd->current_speed = (curspeed + (176/2)) / 176; 1556 cd->max_speed = (maxspeed + (176/2)) / 176; 1557} 1558 1559#define IDE_CD_CAPABILITIES \ 1560 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \ 1561 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \ 1562 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \ 1563 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \ 1564 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM) 1565 1566static struct cdrom_device_ops ide_cdrom_dops = { 1567 .open = ide_cdrom_open_real, 1568 .release = ide_cdrom_release_real, 1569 .drive_status = ide_cdrom_drive_status, 1570 .media_changed = ide_cdrom_check_media_change_real, 1571 .tray_move = ide_cdrom_tray_move, 1572 .lock_door = ide_cdrom_lock_door, 1573 .select_speed = ide_cdrom_select_speed, 1574 .get_last_session = ide_cdrom_get_last_session, 1575 .get_mcn = ide_cdrom_get_mcn, 1576 .reset = ide_cdrom_reset, 1577 .audio_ioctl = ide_cdrom_audio_ioctl, 1578 .capability = IDE_CD_CAPABILITIES, 1579 .generic_packet = ide_cdrom_packet, 1580}; 1581 1582static int ide_cdrom_register(ide_drive_t *drive, int nslots) 1583{ 1584 struct cdrom_info *info = drive->driver_data; 1585 struct cdrom_device_info *devinfo = &info->devinfo; 1586 1587 devinfo->ops = &ide_cdrom_dops; 1588 devinfo->speed = info->current_speed; 1589 devinfo->capacity = nslots; 1590 devinfo->handle = drive; 1591 strcpy(devinfo->name, drive->name); 1592 1593 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT) 1594 devinfo->mask |= CDC_SELECT_SPEED; 1595 1596 devinfo->disk = info->disk; 1597 return register_cdrom(devinfo); 1598} 1599 1600static int ide_cdrom_probe_capabilities(ide_drive_t *drive) 1601{ 1602 struct cdrom_info *cd = drive->driver_data; 1603 struct cdrom_device_info *cdi = &cd->devinfo; 1604 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE]; 1605 mechtype_t mechtype; 1606 int nslots = 1; 1607 1608 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R | 1609 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO | 1610 CDC_MO_DRIVE | CDC_RAM); 1611 1612 if (drive->media == ide_optical) { 1613 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM); 1614 printk(KERN_ERR "%s: ATAPI magneto-optical drive\n", 1615 drive->name); 1616 return nslots; 1617 } 1618 1619 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) { 1620 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT; 1621 cdi->mask &= ~CDC_PLAY_AUDIO; 1622 return nslots; 1623 } 1624 1625 /* 1626 * We have to cheat a little here. the packet will eventually be queued 1627 * with ide_cdrom_packet(), which extracts the drive from cdi->handle. 1628 * Since this device hasn't been registered with the Uniform layer yet, 1629 * it can't do this. Same goes for cdi->ops. 1630 */ 1631 cdi->handle = drive; 1632 cdi->ops = &ide_cdrom_dops; 1633 1634 if (ide_cdrom_get_capabilities(drive, buf)) 1635 return 0; 1636 1637 if ((buf[8 + 6] & 0x01) == 0) 1638 drive->atapi_flags |= IDE_AFLAG_NO_DOORLOCK; 1639 if (buf[8 + 6] & 0x08) 1640 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT; 1641 if (buf[8 + 3] & 0x01) 1642 cdi->mask &= ~CDC_CD_R; 1643 if (buf[8 + 3] & 0x02) 1644 cdi->mask &= ~(CDC_CD_RW | CDC_RAM); 1645 if (buf[8 + 2] & 0x38) 1646 cdi->mask &= ~CDC_DVD; 1647 if (buf[8 + 3] & 0x20) 1648 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM); 1649 if (buf[8 + 3] & 0x10) 1650 cdi->mask &= ~CDC_DVD_R; 1651 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK)) 1652 cdi->mask &= ~CDC_PLAY_AUDIO; 1653 1654 mechtype = buf[8 + 6] >> 5; 1655 if (mechtype == mechtype_caddy || 1656 mechtype == mechtype_popup || 1657 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE)) 1658 cdi->mask |= CDC_CLOSE_TRAY; 1659 1660 if (cdi->sanyo_slot > 0) { 1661 cdi->mask &= ~CDC_SELECT_DISC; 1662 nslots = 3; 1663 } else if (mechtype == mechtype_individual_changer || 1664 mechtype == mechtype_cartridge_changer) { 1665 nslots = cdrom_number_of_slots(cdi); 1666 if (nslots > 1) 1667 cdi->mask &= ~CDC_SELECT_DISC; 1668 } 1669 1670 ide_cdrom_update_speed(drive, buf); 1671 1672 printk(KERN_INFO "%s: ATAPI", drive->name); 1673 1674 /* don't print speed if the drive reported 0 */ 1675 if (cd->max_speed) 1676 printk(KERN_CONT " %dX", cd->max_speed); 1677 1678 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM"); 1679 1680 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0) 1681 printk(KERN_CONT " DVD%s%s", 1682 (cdi->mask & CDC_DVD_R) ? "" : "-R", 1683 (cdi->mask & CDC_DVD_RAM) ? "" : "-RAM"); 1684 1685 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0) 1686 printk(KERN_CONT " CD%s%s", 1687 (cdi->mask & CDC_CD_R) ? "" : "-R", 1688 (cdi->mask & CDC_CD_RW) ? "" : "/RW"); 1689 1690 if ((cdi->mask & CDC_SELECT_DISC) == 0) 1691 printk(KERN_CONT " changer w/%d slots", nslots); 1692 else 1693 printk(KERN_CONT " drive"); 1694 1695 printk(KERN_CONT ", %dkB Cache\n", be16_to_cpup((__be16 *)&buf[8 + 12])); 1696 1697 return nslots; 1698} 1699 1700/* standard prep_rq_fn that builds 10 byte cmds */ 1701static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq) 1702{ 1703 int hard_sect = queue_hardsect_size(q); 1704 long block = (long)rq->hard_sector / (hard_sect >> 9); 1705 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9); 1706 1707 memset(rq->cmd, 0, BLK_MAX_CDB); 1708 1709 if (rq_data_dir(rq) == READ) 1710 rq->cmd[0] = GPCMD_READ_10; 1711 else 1712 rq->cmd[0] = GPCMD_WRITE_10; 1713 1714 /* 1715 * fill in lba 1716 */ 1717 rq->cmd[2] = (block >> 24) & 0xff; 1718 rq->cmd[3] = (block >> 16) & 0xff; 1719 rq->cmd[4] = (block >> 8) & 0xff; 1720 rq->cmd[5] = block & 0xff; 1721 1722 /* 1723 * and transfer length 1724 */ 1725 rq->cmd[7] = (blocks >> 8) & 0xff; 1726 rq->cmd[8] = blocks & 0xff; 1727 rq->cmd_len = 10; 1728 return BLKPREP_OK; 1729} 1730 1731/* 1732 * Most of the SCSI commands are supported directly by ATAPI devices. 1733 * This transform handles the few exceptions. 1734 */ 1735static int ide_cdrom_prep_pc(struct request *rq) 1736{ 1737 u8 *c = rq->cmd; 1738 1739 /* transform 6-byte read/write commands to the 10-byte version */ 1740 if (c[0] == READ_6 || c[0] == WRITE_6) { 1741 c[8] = c[4]; 1742 c[5] = c[3]; 1743 c[4] = c[2]; 1744 c[3] = c[1] & 0x1f; 1745 c[2] = 0; 1746 c[1] &= 0xe0; 1747 c[0] += (READ_10 - READ_6); 1748 rq->cmd_len = 10; 1749 return BLKPREP_OK; 1750 } 1751 1752 /* 1753 * it's silly to pretend we understand 6-byte sense commands, just 1754 * reject with ILLEGAL_REQUEST and the caller should take the 1755 * appropriate action 1756 */ 1757 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) { 1758 rq->errors = ILLEGAL_REQUEST; 1759 return BLKPREP_KILL; 1760 } 1761 1762 return BLKPREP_OK; 1763} 1764 1765static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq) 1766{ 1767 if (blk_fs_request(rq)) 1768 return ide_cdrom_prep_fs(q, rq); 1769 else if (blk_pc_request(rq)) 1770 return ide_cdrom_prep_pc(rq); 1771 1772 return 0; 1773} 1774 1775struct cd_list_entry { 1776 const char *id_model; 1777 const char *id_firmware; 1778 unsigned int cd_flags; 1779}; 1780 1781#ifdef CONFIG_IDE_PROC_FS 1782static sector_t ide_cdrom_capacity(ide_drive_t *drive) 1783{ 1784 unsigned long capacity, sectors_per_frame; 1785 1786 if (cdrom_read_capacity(drive, &capacity, §ors_per_frame, NULL)) 1787 return 0; 1788 1789 return capacity * sectors_per_frame; 1790} 1791 1792static int proc_idecd_read_capacity(char *page, char **start, off_t off, 1793 int count, int *eof, void *data) 1794{ 1795 ide_drive_t *drive = data; 1796 int len; 1797 1798 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive)); 1799 PROC_IDE_READ_RETURN(page, start, off, count, eof, len); 1800} 1801 1802static ide_proc_entry_t idecd_proc[] = { 1803 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL }, 1804 { NULL, 0, NULL, NULL } 1805}; 1806 1807ide_devset_rw_field(dsc_overlap, dsc_overlap); 1808 1809static const struct ide_proc_devset idecd_settings[] = { 1810 IDE_PROC_DEVSET(dsc_overlap, 0, 1), 1811 { 0 }, 1812}; 1813#endif 1814 1815static const struct cd_list_entry ide_cd_quirks_list[] = { 1816 /* Limit transfer size per interrupt. */ 1817 { "SAMSUNG CD-ROM SCR-2430", NULL, IDE_AFLAG_LIMIT_NFRAMES }, 1818 { "SAMSUNG CD-ROM SCR-2432", NULL, IDE_AFLAG_LIMIT_NFRAMES }, 1819 /* SCR-3231 doesn't support the SET_CD_SPEED command. */ 1820 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT }, 1821 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */ 1822 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD | 1823 IDE_AFLAG_PRE_ATAPI12, }, 1824 /* Vertos 300, some versions of this drive like to talk BCD. */ 1825 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, }, 1826 /* Vertos 600 ESD. */ 1827 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, }, 1828 /* 1829 * Sanyo 3 CD changer uses a non-standard command for CD changing 1830 * (by default standard ATAPI support for CD changers is used). 1831 */ 1832 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD }, 1833 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD }, 1834 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD }, 1835 /* Stingray 8X CD-ROM. */ 1836 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 }, 1837 /* 1838 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length 1839 * mode sense page capabilities size, but older drives break. 1840 */ 1841 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE }, 1842 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE }, 1843 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */ 1844 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS }, 1845 /* 1846 * Some drives used by Apple don't advertise audio play 1847 * but they do support reading TOC & audio datas. 1848 */ 1849 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1850 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1851 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1852 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1853 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1854 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1855 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE }, 1856 { NULL, NULL, 0 } 1857}; 1858 1859static unsigned int ide_cd_flags(u16 *id) 1860{ 1861 const struct cd_list_entry *cle = ide_cd_quirks_list; 1862 1863 while (cle->id_model) { 1864 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 && 1865 (cle->id_firmware == NULL || 1866 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware))) 1867 return cle->cd_flags; 1868 cle++; 1869 } 1870 1871 return 0; 1872} 1873 1874static int ide_cdrom_setup(ide_drive_t *drive) 1875{ 1876 struct cdrom_info *cd = drive->driver_data; 1877 struct cdrom_device_info *cdi = &cd->devinfo; 1878 u16 *id = drive->id; 1879 char *fw_rev = (char *)&id[ATA_ID_FW_REV]; 1880 int nslots; 1881 1882 blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn); 1883 blk_queue_dma_alignment(drive->queue, 31); 1884 blk_queue_update_dma_pad(drive->queue, 15); 1885 drive->queue->unplug_delay = (1 * HZ) / 1000; 1886 if (!drive->queue->unplug_delay) 1887 drive->queue->unplug_delay = 1; 1888 1889 drive->special.all = 0; 1890 1891 drive->atapi_flags = IDE_AFLAG_MEDIA_CHANGED | IDE_AFLAG_NO_EJECT | 1892 ide_cd_flags(id); 1893 1894 if ((id[ATA_ID_CONFIG] & 0x0060) == 0x20) 1895 drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT; 1896 1897 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) && 1898 fw_rev[4] == '1' && fw_rev[6] <= '2') 1899 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD | 1900 IDE_AFLAG_TOCADDR_AS_BCD); 1901 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) && 1902 fw_rev[4] == '1' && fw_rev[6] <= '2') 1903 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD; 1904 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD) 1905 /* 3 => use CD in slot 0 */ 1906 cdi->sanyo_slot = 3; 1907 1908 nslots = ide_cdrom_probe_capabilities(drive); 1909 1910 /* set correct block size */ 1911 blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE); 1912 1913 drive->dsc_overlap = (drive->next != drive); 1914 1915 if (ide_cdrom_register(drive, nslots)) { 1916 printk(KERN_ERR "%s: %s failed to register device with the" 1917 " cdrom driver.\n", drive->name, __func__); 1918 cd->devinfo.handle = NULL; 1919 return 1; 1920 } 1921 1922 ide_proc_register_driver(drive, cd->driver); 1923 return 0; 1924} 1925 1926static void ide_cd_remove(ide_drive_t *drive) 1927{ 1928 struct cdrom_info *info = drive->driver_data; 1929 1930 ide_proc_unregister_driver(drive, info->driver); 1931 1932 del_gendisk(info->disk); 1933 1934 ide_cd_put(info); 1935} 1936 1937static void ide_cd_release(struct kref *kref) 1938{ 1939 struct cdrom_info *info = to_ide_drv(kref, cdrom_info); 1940 struct cdrom_device_info *devinfo = &info->devinfo; 1941 ide_drive_t *drive = info->drive; 1942 struct gendisk *g = info->disk; 1943 1944 kfree(info->toc); 1945 if (devinfo->handle == drive) 1946 unregister_cdrom(devinfo); 1947 drive->dsc_overlap = 0; 1948 drive->driver_data = NULL; 1949 blk_queue_prep_rq(drive->queue, NULL); 1950 g->private_data = NULL; 1951 put_disk(g); 1952 kfree(info); 1953} 1954 1955static int ide_cd_probe(ide_drive_t *); 1956 1957static ide_driver_t ide_cdrom_driver = { 1958 .gen_driver = { 1959 .owner = THIS_MODULE, 1960 .name = "ide-cdrom", 1961 .bus = &ide_bus_type, 1962 }, 1963 .probe = ide_cd_probe, 1964 .remove = ide_cd_remove, 1965 .version = IDECD_VERSION, 1966 .media = ide_cdrom, 1967 .do_request = ide_cd_do_request, 1968 .end_request = ide_end_request, 1969 .error = __ide_error, 1970#ifdef CONFIG_IDE_PROC_FS 1971 .proc = idecd_proc, 1972 .settings = idecd_settings, 1973#endif 1974}; 1975 1976static int idecd_open(struct inode *inode, struct file *file) 1977{ 1978 struct gendisk *disk = inode->i_bdev->bd_disk; 1979 struct cdrom_info *info; 1980 int rc = -ENOMEM; 1981 1982 info = ide_cd_get(disk); 1983 if (!info) 1984 return -ENXIO; 1985 1986 rc = cdrom_open(&info->devinfo, inode, file); 1987 1988 if (rc < 0) 1989 ide_cd_put(info); 1990 1991 return rc; 1992} 1993 1994static int idecd_release(struct inode *inode, struct file *file) 1995{ 1996 struct gendisk *disk = inode->i_bdev->bd_disk; 1997 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 1998 1999 cdrom_release(&info->devinfo, file); 2000 2001 ide_cd_put(info); 2002 2003 return 0; 2004} 2005 2006static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg) 2007{ 2008 struct packet_command cgc; 2009 char buffer[16]; 2010 int stat; 2011 char spindown; 2012 2013 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char))) 2014 return -EFAULT; 2015 2016 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN); 2017 2018 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0); 2019 if (stat) 2020 return stat; 2021 2022 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f); 2023 return cdrom_mode_select(cdi, &cgc); 2024} 2025 2026static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg) 2027{ 2028 struct packet_command cgc; 2029 char buffer[16]; 2030 int stat; 2031 char spindown; 2032 2033 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN); 2034 2035 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0); 2036 if (stat) 2037 return stat; 2038 2039 spindown = buffer[11] & 0x0f; 2040 if (copy_to_user((void __user *)arg, &spindown, sizeof(char))) 2041 return -EFAULT; 2042 return 0; 2043} 2044 2045static int idecd_ioctl(struct inode *inode, struct file *file, 2046 unsigned int cmd, unsigned long arg) 2047{ 2048 struct block_device *bdev = inode->i_bdev; 2049 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info); 2050 int err; 2051 2052 switch (cmd) { 2053 case CDROMSETSPINDOWN: 2054 return idecd_set_spindown(&info->devinfo, arg); 2055 case CDROMGETSPINDOWN: 2056 return idecd_get_spindown(&info->devinfo, arg); 2057 default: 2058 break; 2059 } 2060 2061 err = generic_ide_ioctl(info->drive, file, bdev, cmd, arg); 2062 if (err == -EINVAL) 2063 err = cdrom_ioctl(file, &info->devinfo, inode, cmd, arg); 2064 2065 return err; 2066} 2067 2068static int idecd_media_changed(struct gendisk *disk) 2069{ 2070 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 2071 return cdrom_media_changed(&info->devinfo); 2072} 2073 2074static int idecd_revalidate_disk(struct gendisk *disk) 2075{ 2076 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 2077 struct request_sense sense; 2078 2079 ide_cd_read_toc(info->drive, &sense); 2080 2081 return 0; 2082} 2083 2084static struct block_device_operations idecd_ops = { 2085 .owner = THIS_MODULE, 2086 .open = idecd_open, 2087 .release = idecd_release, 2088 .ioctl = idecd_ioctl, 2089 .media_changed = idecd_media_changed, 2090 .revalidate_disk = idecd_revalidate_disk 2091}; 2092 2093/* module options */ 2094static char *ignore; 2095 2096module_param(ignore, charp, 0400); 2097MODULE_DESCRIPTION("ATAPI CD-ROM Driver"); 2098 2099static int ide_cd_probe(ide_drive_t *drive) 2100{ 2101 struct cdrom_info *info; 2102 struct gendisk *g; 2103 struct request_sense sense; 2104 2105 if (!strstr("ide-cdrom", drive->driver_req)) 2106 goto failed; 2107 2108 if (drive->media != ide_cdrom && drive->media != ide_optical) 2109 goto failed; 2110 2111 /* skip drives that we were told to ignore */ 2112 if (ignore != NULL) { 2113 if (strstr(ignore, drive->name)) { 2114 printk(KERN_INFO "ide-cd: ignoring drive %s\n", 2115 drive->name); 2116 goto failed; 2117 } 2118 } 2119 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL); 2120 if (info == NULL) { 2121 printk(KERN_ERR "%s: Can't allocate a cdrom structure\n", 2122 drive->name); 2123 goto failed; 2124 } 2125 2126 g = alloc_disk(1 << PARTN_BITS); 2127 if (!g) 2128 goto out_free_cd; 2129 2130 ide_init_disk(g, drive); 2131 2132 kref_init(&info->kref); 2133 2134 info->drive = drive; 2135 info->driver = &ide_cdrom_driver; 2136 info->disk = g; 2137 2138 g->private_data = &info->driver; 2139 2140 drive->driver_data = info; 2141 2142 g->minors = 1; 2143 g->driverfs_dev = &drive->gendev; 2144 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE; 2145 if (ide_cdrom_setup(drive)) { 2146 ide_cd_release(&info->kref); 2147 goto failed; 2148 } 2149 2150 ide_cd_read_toc(drive, &sense); 2151 g->fops = &idecd_ops; 2152 g->flags |= GENHD_FL_REMOVABLE; 2153 add_disk(g); 2154 return 0; 2155 2156out_free_cd: 2157 kfree(info); 2158failed: 2159 return -ENODEV; 2160} 2161 2162static void __exit ide_cdrom_exit(void) 2163{ 2164 driver_unregister(&ide_cdrom_driver.gen_driver); 2165} 2166 2167static int __init ide_cdrom_init(void) 2168{ 2169 return driver_register(&ide_cdrom_driver.gen_driver); 2170} 2171 2172MODULE_ALIAS("ide:*m-cdrom*"); 2173MODULE_ALIAS("ide-cd"); 2174module_init(ide_cdrom_init); 2175module_exit(ide_cdrom_exit); 2176MODULE_LICENSE("GPL"); 2177