ide-cd.c revision a83ead23449759b14aa1f194576ac442e84d3efb
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 unsigned long valid; 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 bio_sectors = bio_sectors(failed_command->bio); 177 if (bio_sectors < 4) 178 bio_sectors = 4; 179 if (drive->queue->hardsect_size == 2048) 180 /* device sector size is 2K */ 181 sector <<= 2; 182 sector &= ~(bio_sectors - 1); 183 valid = (sector - failed_command->sector) << 9; 184 185 if (sector < get_capacity(info->disk) && 186 drive->probed_capacity - sector < 4 * 75) 187 set_capacity(info->disk, sector); 188 } 189 } 190 191 ide_cd_log_error(drive->name, failed_command, sense); 192} 193 194/* Initialize a ide-cd packet command request */ 195void ide_cd_init_rq(ide_drive_t *drive, struct request *rq) 196{ 197 struct cdrom_info *cd = drive->driver_data; 198 199 ide_init_drive_cmd(rq); 200 rq->cmd_type = REQ_TYPE_ATA_PC; 201 rq->rq_disk = cd->disk; 202} 203 204static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense, 205 struct request *failed_command) 206{ 207 struct cdrom_info *info = drive->driver_data; 208 struct request *rq = &info->request_sense_request; 209 210 if (sense == NULL) 211 sense = &info->sense_data; 212 213 /* stuff the sense request in front of our current request */ 214 ide_cd_init_rq(drive, rq); 215 216 rq->data = sense; 217 rq->cmd[0] = GPCMD_REQUEST_SENSE; 218 rq->cmd[4] = 18; 219 rq->data_len = 18; 220 221 rq->cmd_type = REQ_TYPE_SENSE; 222 223 /* NOTE! Save the failed command in "rq->buffer" */ 224 rq->buffer = (void *) failed_command; 225 226 (void) ide_do_drive_cmd(drive, rq, ide_preempt); 227} 228 229static void cdrom_end_request(ide_drive_t *drive, int uptodate) 230{ 231 struct request *rq = HWGROUP(drive)->rq; 232 int nsectors = rq->hard_cur_sectors; 233 234 if (blk_sense_request(rq) && uptodate) { 235 /* 236 * For REQ_TYPE_SENSE, "rq->buffer" points to the original 237 * failed request 238 */ 239 struct request *failed = (struct request *) rq->buffer; 240 struct cdrom_info *info = drive->driver_data; 241 void *sense = &info->sense_data; 242 unsigned long flags; 243 244 if (failed) { 245 if (failed->sense) { 246 sense = failed->sense; 247 failed->sense_len = rq->sense_len; 248 } 249 cdrom_analyze_sense_data(drive, failed, sense); 250 /* 251 * now end the failed request 252 */ 253 if (blk_fs_request(failed)) { 254 if (ide_end_dequeued_request(drive, failed, 0, 255 failed->hard_nr_sectors)) 256 BUG(); 257 } else { 258 spin_lock_irqsave(&ide_lock, flags); 259 if (__blk_end_request(failed, -EIO, 260 failed->data_len)) 261 BUG(); 262 spin_unlock_irqrestore(&ide_lock, flags); 263 } 264 } else 265 cdrom_analyze_sense_data(drive, NULL, sense); 266 } 267 268 if (!rq->current_nr_sectors && blk_fs_request(rq)) 269 uptodate = 1; 270 /* make sure it's fully ended */ 271 if (blk_pc_request(rq)) 272 nsectors = (rq->data_len + 511) >> 9; 273 if (!nsectors) 274 nsectors = 1; 275 276 ide_end_request(drive, uptodate, nsectors); 277} 278 279static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 st) 280{ 281 if (st & 0x80) 282 return; 283 ide_dump_status(drive, msg, st); 284} 285 286/* 287 * Returns: 288 * 0: if the request should be continued. 289 * 1: if the request was ended. 290 */ 291static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret) 292{ 293 struct request *rq = HWGROUP(drive)->rq; 294 int stat, err, sense_key; 295 296 /* check for errors */ 297 stat = ide_read_status(drive); 298 299 if (stat_ret) 300 *stat_ret = stat; 301 302 if (OK_STAT(stat, good_stat, BAD_R_STAT)) 303 return 0; 304 305 /* get the IDE error register */ 306 err = ide_read_error(drive); 307 sense_key = err >> 4; 308 309 if (rq == NULL) { 310 printk(KERN_ERR "%s: missing rq in %s\n", 311 drive->name, __func__); 312 return 1; 313 } 314 315 if (blk_sense_request(rq)) { 316 /* 317 * We got an error trying to get sense info from the drive 318 * (probably while trying to recover from a former error). 319 * Just give up. 320 */ 321 rq->cmd_flags |= REQ_FAILED; 322 cdrom_end_request(drive, 0); 323 ide_error(drive, "request sense failure", stat); 324 return 1; 325 326 } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) { 327 /* All other functions, except for READ. */ 328 329 /* 330 * if we have an error, pass back CHECK_CONDITION as the 331 * scsi status byte 332 */ 333 if (blk_pc_request(rq) && !rq->errors) 334 rq->errors = SAM_STAT_CHECK_CONDITION; 335 336 /* check for tray open */ 337 if (sense_key == NOT_READY) { 338 cdrom_saw_media_change(drive); 339 } else if (sense_key == UNIT_ATTENTION) { 340 /* check for media change */ 341 cdrom_saw_media_change(drive); 342 return 0; 343 } else if (sense_key == ILLEGAL_REQUEST && 344 rq->cmd[0] == GPCMD_START_STOP_UNIT) { 345 /* 346 * Don't print error message for this condition-- 347 * SFF8090i indicates that 5/24/00 is the correct 348 * response to a request to close the tray if the 349 * drive doesn't have that capability. 350 * cdrom_log_sense() knows this! 351 */ 352 } else if (!(rq->cmd_flags & REQ_QUIET)) { 353 /* otherwise, print an error */ 354 ide_dump_status(drive, "packet command error", stat); 355 } 356 357 rq->cmd_flags |= REQ_FAILED; 358 359 /* 360 * instead of playing games with moving completions around, 361 * remove failed request completely and end it when the 362 * request sense has completed 363 */ 364 goto end_request; 365 366 } else if (blk_fs_request(rq)) { 367 int do_end_request = 0; 368 369 /* handle errors from READ and WRITE requests */ 370 371 if (blk_noretry_request(rq)) 372 do_end_request = 1; 373 374 if (sense_key == NOT_READY) { 375 /* tray open */ 376 if (rq_data_dir(rq) == READ) { 377 cdrom_saw_media_change(drive); 378 379 /* fail the request */ 380 printk(KERN_ERR "%s: tray open\n", drive->name); 381 do_end_request = 1; 382 } else { 383 struct cdrom_info *info = drive->driver_data; 384 385 /* 386 * Allow the drive 5 seconds to recover, some 387 * devices will return this error while flushing 388 * data from cache. 389 */ 390 if (!rq->errors) 391 info->write_timeout = jiffies + 392 ATAPI_WAIT_WRITE_BUSY; 393 rq->errors = 1; 394 if (time_after(jiffies, info->write_timeout)) 395 do_end_request = 1; 396 else { 397 unsigned long flags; 398 399 /* 400 * take a breather relying on the unplug 401 * timer to kick us again 402 */ 403 spin_lock_irqsave(&ide_lock, flags); 404 blk_plug_device(drive->queue); 405 spin_unlock_irqrestore(&ide_lock, 406 flags); 407 return 1; 408 } 409 } 410 } else if (sense_key == UNIT_ATTENTION) { 411 /* media change */ 412 cdrom_saw_media_change(drive); 413 414 /* 415 * Arrange to retry the request but be sure to give up 416 * if we've retried too many times. 417 */ 418 if (++rq->errors > ERROR_MAX) 419 do_end_request = 1; 420 } else if (sense_key == ILLEGAL_REQUEST || 421 sense_key == DATA_PROTECT) { 422 /* 423 * No point in retrying after an illegal request or data 424 * protect error. 425 */ 426 ide_dump_status_no_sense(drive, "command error", stat); 427 do_end_request = 1; 428 } else if (sense_key == MEDIUM_ERROR) { 429 /* 430 * No point in re-trying a zillion times on a bad 431 * sector. If we got here the error is not correctable. 432 */ 433 ide_dump_status_no_sense(drive, 434 "media error (bad sector)", 435 stat); 436 do_end_request = 1; 437 } else if (sense_key == BLANK_CHECK) { 438 /* disk appears blank ?? */ 439 ide_dump_status_no_sense(drive, "media error (blank)", 440 stat); 441 do_end_request = 1; 442 } else if ((err & ~ABRT_ERR) != 0) { 443 /* go to the default handler for other errors */ 444 ide_error(drive, "cdrom_decode_status", stat); 445 return 1; 446 } else if ((++rq->errors > ERROR_MAX)) { 447 /* we've racked up too many retries, abort */ 448 do_end_request = 1; 449 } 450 451 /* 452 * End a request through request sense analysis when we have 453 * sense data. We need this in order to perform end of media 454 * processing. 455 */ 456 if (do_end_request) 457 goto end_request; 458 459 /* 460 * If we got a CHECK_CONDITION status, queue 461 * a request sense command. 462 */ 463 if (stat & ERR_STAT) 464 cdrom_queue_request_sense(drive, NULL, NULL); 465 } else { 466 blk_dump_rq_flags(rq, "ide-cd: bad rq"); 467 cdrom_end_request(drive, 0); 468 } 469 470 /* retry, or handle the next request */ 471 return 1; 472 473end_request: 474 if (stat & ERR_STAT) { 475 unsigned long flags; 476 477 spin_lock_irqsave(&ide_lock, flags); 478 blkdev_dequeue_request(rq); 479 HWGROUP(drive)->rq = NULL; 480 spin_unlock_irqrestore(&ide_lock, flags); 481 482 cdrom_queue_request_sense(drive, rq->sense, rq); 483 } else 484 cdrom_end_request(drive, 0); 485 486 return 1; 487} 488 489static int cdrom_timer_expiry(ide_drive_t *drive) 490{ 491 struct request *rq = HWGROUP(drive)->rq; 492 unsigned long wait = 0; 493 494 /* 495 * Some commands are *slow* and normally take a long time to complete. 496 * Usually we can use the ATAPI "disconnect" to bypass this, but not all 497 * commands/drives support that. Let ide_timer_expiry keep polling us 498 * for these. 499 */ 500 switch (rq->cmd[0]) { 501 case GPCMD_BLANK: 502 case GPCMD_FORMAT_UNIT: 503 case GPCMD_RESERVE_RZONE_TRACK: 504 case GPCMD_CLOSE_TRACK: 505 case GPCMD_FLUSH_CACHE: 506 wait = ATAPI_WAIT_PC; 507 break; 508 default: 509 if (!(rq->cmd_flags & REQ_QUIET)) 510 printk(KERN_INFO "ide-cd: cmd 0x%x timed out\n", 511 rq->cmd[0]); 512 wait = 0; 513 break; 514 } 515 return wait; 516} 517 518/* 519 * Set up the device registers for transferring a packet command on DEV, 520 * expecting to later transfer XFERLEN bytes. HANDLER is the routine 521 * which actually transfers the command to the drive. If this is a 522 * drq_interrupt device, this routine will arrange for HANDLER to be 523 * called when the interrupt from the drive arrives. Otherwise, HANDLER 524 * will be called immediately after the drive is prepared for the transfer. 525 */ 526static ide_startstop_t cdrom_start_packet_command(ide_drive_t *drive, 527 int xferlen, 528 ide_handler_t *handler) 529{ 530 ide_startstop_t startstop; 531 struct cdrom_info *info = drive->driver_data; 532 ide_hwif_t *hwif = drive->hwif; 533 534 /* wait for the controller to be idle */ 535 if (ide_wait_stat(&startstop, drive, 0, BUSY_STAT, WAIT_READY)) 536 return startstop; 537 538 /* FIXME: for Virtual DMA we must check harder */ 539 if (info->dma) 540 info->dma = !hwif->dma_ops->dma_setup(drive); 541 542 /* set up the controller registers */ 543 ide_pktcmd_tf_load(drive, IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL | 544 IDE_TFLAG_NO_SELECT_MASK, xferlen, info->dma); 545 546 if (info->cd_flags & IDE_CD_FLAG_DRQ_INTERRUPT) { 547 /* waiting for CDB interrupt, not DMA yet. */ 548 if (info->dma) 549 drive->waiting_for_dma = 0; 550 551 /* packet command */ 552 ide_execute_command(drive, WIN_PACKETCMD, handler, 553 ATAPI_WAIT_PC, cdrom_timer_expiry); 554 return ide_started; 555 } else { 556 ide_execute_pkt_cmd(drive); 557 558 return (*handler) (drive); 559 } 560} 561 562/* 563 * Send a packet command to DRIVE described by CMD_BUF and CMD_LEN. The device 564 * registers must have already been prepared by cdrom_start_packet_command. 565 * HANDLER is the interrupt handler to call when the command completes or 566 * there's data ready. 567 */ 568#define ATAPI_MIN_CDB_BYTES 12 569static ide_startstop_t cdrom_transfer_packet_command(ide_drive_t *drive, 570 struct request *rq, 571 ide_handler_t *handler) 572{ 573 ide_hwif_t *hwif = drive->hwif; 574 int cmd_len; 575 struct cdrom_info *info = drive->driver_data; 576 ide_startstop_t startstop; 577 578 if (info->cd_flags & IDE_CD_FLAG_DRQ_INTERRUPT) { 579 /* 580 * Here we should have been called after receiving an interrupt 581 * from the device. DRQ should how be set. 582 */ 583 584 /* check for errors */ 585 if (cdrom_decode_status(drive, DRQ_STAT, NULL)) 586 return ide_stopped; 587 588 /* ok, next interrupt will be DMA interrupt */ 589 if (info->dma) 590 drive->waiting_for_dma = 1; 591 } else { 592 /* otherwise, we must wait for DRQ to get set */ 593 if (ide_wait_stat(&startstop, drive, DRQ_STAT, 594 BUSY_STAT, WAIT_READY)) 595 return startstop; 596 } 597 598 /* arm the interrupt handler */ 599 ide_set_handler(drive, handler, rq->timeout, cdrom_timer_expiry); 600 601 /* ATAPI commands get padded out to 12 bytes minimum */ 602 cmd_len = COMMAND_SIZE(rq->cmd[0]); 603 if (cmd_len < ATAPI_MIN_CDB_BYTES) 604 cmd_len = ATAPI_MIN_CDB_BYTES; 605 606 /* send the command to the device */ 607 hwif->output_data(drive, NULL, rq->cmd, cmd_len); 608 609 /* start the DMA if need be */ 610 if (info->dma) 611 hwif->dma_ops->dma_start(drive); 612 613 return ide_started; 614} 615 616/* 617 * Block read functions. 618 */ 619static void ide_cd_pad_transfer(ide_drive_t *drive, xfer_func_t *xf, int len) 620{ 621 while (len > 0) { 622 int dum = 0; 623 xf(drive, NULL, &dum, sizeof(dum)); 624 len -= sizeof(dum); 625 } 626} 627 628static void ide_cd_drain_data(ide_drive_t *drive, int nsects) 629{ 630 while (nsects > 0) { 631 static char dum[SECTOR_SIZE]; 632 633 drive->hwif->input_data(drive, NULL, dum, sizeof(dum)); 634 nsects--; 635 } 636} 637 638/* 639 * Check the contents of the interrupt reason register from the cdrom 640 * and attempt to recover if there are problems. Returns 0 if everything's 641 * ok; nonzero if the request has been terminated. 642 */ 643static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq, 644 int len, int ireason, int rw) 645{ 646 /* 647 * ireason == 0: the drive wants to receive data from us 648 * ireason == 2: the drive is expecting to transfer data to us 649 */ 650 if (ireason == (!rw << 1)) 651 return 0; 652 else if (ireason == (rw << 1)) { 653 ide_hwif_t *hwif = drive->hwif; 654 xfer_func_t *xf; 655 656 /* whoops... */ 657 printk(KERN_ERR "%s: %s: wrong transfer direction!\n", 658 drive->name, __func__); 659 660 xf = rw ? hwif->output_data : hwif->input_data; 661 ide_cd_pad_transfer(drive, xf, len); 662 } else if (rw == 0 && ireason == 1) { 663 /* 664 * Some drives (ASUS) seem to tell us that status info is 665 * available. Just get it and ignore. 666 */ 667 (void)ide_read_status(drive); 668 return 0; 669 } else { 670 /* drive wants a command packet, or invalid ireason... */ 671 printk(KERN_ERR "%s: %s: bad interrupt reason 0x%02x\n", 672 drive->name, __func__, ireason); 673 } 674 675 if (rq->cmd_type == REQ_TYPE_ATA_PC) 676 rq->cmd_flags |= REQ_FAILED; 677 678 cdrom_end_request(drive, 0); 679 return -1; 680} 681 682/* 683 * Assume that the drive will always provide data in multiples of at least 684 * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise. 685 */ 686static int ide_cd_check_transfer_size(ide_drive_t *drive, int len) 687{ 688 struct cdrom_info *cd = drive->driver_data; 689 690 if ((len % SECTOR_SIZE) == 0) 691 return 0; 692 693 printk(KERN_ERR "%s: %s: Bad transfer size %d\n", 694 drive->name, __func__, len); 695 696 if (cd->cd_flags & IDE_CD_FLAG_LIMIT_NFRAMES) 697 printk(KERN_ERR " This drive is not supported by " 698 "this version of the driver\n"); 699 else { 700 printk(KERN_ERR " Trying to limit transfer sizes\n"); 701 cd->cd_flags |= IDE_CD_FLAG_LIMIT_NFRAMES; 702 } 703 704 return 1; 705} 706 707static ide_startstop_t cdrom_newpc_intr(ide_drive_t *); 708 709/* 710 * Routine to send a read/write packet command to the drive. This is usually 711 * called directly from cdrom_start_{read,write}(). However, for drq_interrupt 712 * devices, it is called from an interrupt when the drive is ready to accept 713 * the command. 714 */ 715static ide_startstop_t cdrom_start_rw_cont(ide_drive_t *drive) 716{ 717 struct request *rq = HWGROUP(drive)->rq; 718 719 if (rq_data_dir(rq) == READ) { 720 unsigned short sectors_per_frame = 721 queue_hardsect_size(drive->queue) >> SECTOR_BITS; 722 int nskip = rq->sector & (sectors_per_frame - 1); 723 724 /* 725 * If the requested sector doesn't start on a frame boundary, 726 * we must adjust the start of the transfer so that it does, 727 * and remember to skip the first few sectors. 728 * 729 * If the rq->current_nr_sectors field is larger than the size 730 * of the buffer, it will mean that we're to skip a number of 731 * sectors equal to the amount by which rq->current_nr_sectors 732 * is larger than the buffer size. 733 */ 734 if (nskip > 0) { 735 /* sanity check... */ 736 if (rq->current_nr_sectors != 737 bio_cur_sectors(rq->bio)) { 738 printk(KERN_ERR "%s: %s: buffer botch (%u)\n", 739 drive->name, __func__, 740 rq->current_nr_sectors); 741 cdrom_end_request(drive, 0); 742 return ide_stopped; 743 } 744 rq->current_nr_sectors += nskip; 745 } 746 } 747#if 0 748 else 749 /* the immediate bit */ 750 rq->cmd[1] = 1 << 3; 751#endif 752 /* set up the command */ 753 rq->timeout = ATAPI_WAIT_PC; 754 755 /* send the command to the drive and return */ 756 return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr); 757} 758 759#define IDECD_SEEK_THRESHOLD (1000) /* 1000 blocks */ 760#define IDECD_SEEK_TIMER (5 * WAIT_MIN_SLEEP) /* 100 ms */ 761#define IDECD_SEEK_TIMEOUT (2 * WAIT_CMD) /* 20 sec */ 762 763static ide_startstop_t cdrom_seek_intr(ide_drive_t *drive) 764{ 765 struct cdrom_info *info = drive->driver_data; 766 int stat; 767 static int retry = 10; 768 769 if (cdrom_decode_status(drive, 0, &stat)) 770 return ide_stopped; 771 772 info->cd_flags |= IDE_CD_FLAG_SEEKING; 773 774 if (retry && time_after(jiffies, info->start_seek + IDECD_SEEK_TIMER)) { 775 if (--retry == 0) 776 drive->dsc_overlap = 0; 777 } 778 return ide_stopped; 779} 780 781static ide_startstop_t cdrom_start_seek_continuation(ide_drive_t *drive) 782{ 783 struct request *rq = HWGROUP(drive)->rq; 784 sector_t frame = rq->sector; 785 786 sector_div(frame, queue_hardsect_size(drive->queue) >> SECTOR_BITS); 787 788 memset(rq->cmd, 0, sizeof(rq->cmd)); 789 rq->cmd[0] = GPCMD_SEEK; 790 put_unaligned(cpu_to_be32(frame), (unsigned int *) &rq->cmd[2]); 791 792 rq->timeout = ATAPI_WAIT_PC; 793 return cdrom_transfer_packet_command(drive, rq, &cdrom_seek_intr); 794} 795 796static ide_startstop_t cdrom_start_seek(ide_drive_t *drive, unsigned int block) 797{ 798 struct cdrom_info *info = drive->driver_data; 799 800 info->dma = 0; 801 info->start_seek = jiffies; 802 return cdrom_start_packet_command(drive, 0, 803 cdrom_start_seek_continuation); 804} 805 806/* 807 * Fix up a possibly partially-processed request so that we can start it over 808 * entirely, or even put it back on the request queue. 809 */ 810static void restore_request(struct request *rq) 811{ 812 if (rq->buffer != bio_data(rq->bio)) { 813 sector_t n = 814 (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE; 815 816 rq->buffer = bio_data(rq->bio); 817 rq->nr_sectors += n; 818 rq->sector -= n; 819 } 820 rq->current_nr_sectors = bio_cur_sectors(rq->bio); 821 rq->hard_cur_sectors = rq->current_nr_sectors; 822 rq->hard_nr_sectors = rq->nr_sectors; 823 rq->hard_sector = rq->sector; 824 rq->q->prep_rq_fn(rq->q, rq); 825} 826 827/* 828 * All other packet commands. 829 */ 830static void ide_cd_request_sense_fixup(struct request *rq) 831{ 832 /* 833 * Some of the trailing request sense fields are optional, 834 * and some drives don't send them. Sigh. 835 */ 836 if (rq->cmd[0] == GPCMD_REQUEST_SENSE && 837 rq->data_len > 0 && rq->data_len <= 5) 838 while (rq->data_len > 0) { 839 *(u8 *)rq->data++ = 0; 840 --rq->data_len; 841 } 842} 843 844int ide_cd_queue_pc(ide_drive_t *drive, struct request *rq) 845{ 846 struct request_sense sense; 847 int retries = 10; 848 unsigned int flags = rq->cmd_flags; 849 850 if (rq->sense == NULL) 851 rq->sense = &sense; 852 853 /* start of retry loop */ 854 do { 855 int error; 856 unsigned long time = jiffies; 857 rq->cmd_flags = flags; 858 859 error = ide_do_drive_cmd(drive, rq, ide_wait); 860 time = jiffies - time; 861 862 /* 863 * FIXME: we should probably abort/retry or something in case of 864 * failure. 865 */ 866 if (rq->cmd_flags & REQ_FAILED) { 867 /* 868 * The request failed. Retry if it was due to a unit 869 * attention status (usually means media was changed). 870 */ 871 struct request_sense *reqbuf = rq->sense; 872 873 if (reqbuf->sense_key == UNIT_ATTENTION) 874 cdrom_saw_media_change(drive); 875 else if (reqbuf->sense_key == NOT_READY && 876 reqbuf->asc == 4 && reqbuf->ascq != 4) { 877 /* 878 * The drive is in the process of loading 879 * a disk. Retry, but wait a little to give 880 * the drive time to complete the load. 881 */ 882 ssleep(2); 883 } else { 884 /* otherwise, don't retry */ 885 retries = 0; 886 } 887 --retries; 888 } 889 890 /* end of retry loop */ 891 } while ((rq->cmd_flags & REQ_FAILED) && retries >= 0); 892 893 /* return an error if the command failed */ 894 return (rq->cmd_flags & REQ_FAILED) ? -EIO : 0; 895} 896 897/* 898 * Called from blk_end_request_callback() after the data of the request is 899 * completed and before the request itself is completed. By returning value '1', 900 * blk_end_request_callback() returns immediately without completing it. 901 */ 902static int cdrom_newpc_intr_dummy_cb(struct request *rq) 903{ 904 return 1; 905} 906 907static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive) 908{ 909 ide_hwif_t *hwif = drive->hwif; 910 struct cdrom_info *info = drive->driver_data; 911 struct request *rq = HWGROUP(drive)->rq; 912 xfer_func_t *xferfunc; 913 ide_expiry_t *expiry = NULL; 914 int dma_error = 0, dma, stat, ireason, len, thislen, uptodate = 0; 915 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0; 916 unsigned int timeout; 917 u8 lowcyl, highcyl; 918 919 /* check for errors */ 920 dma = info->dma; 921 if (dma) { 922 info->dma = 0; 923 dma_error = hwif->dma_ops->dma_end(drive); 924 if (dma_error) { 925 printk(KERN_ERR "%s: DMA %s error\n", drive->name, 926 write ? "write" : "read"); 927 ide_dma_off(drive); 928 } 929 } 930 931 if (cdrom_decode_status(drive, 0, &stat)) 932 return ide_stopped; 933 934 /* using dma, transfer is complete now */ 935 if (dma) { 936 if (dma_error) 937 return ide_error(drive, "dma error", stat); 938 if (blk_fs_request(rq)) { 939 ide_end_request(drive, 1, rq->nr_sectors); 940 return ide_stopped; 941 } 942 goto end_request; 943 } 944 945 /* ok we fall to pio :/ */ 946 ireason = hwif->INB(hwif->io_ports.nsect_addr) & 0x3; 947 lowcyl = hwif->INB(hwif->io_ports.lbam_addr); 948 highcyl = hwif->INB(hwif->io_ports.lbah_addr); 949 950 len = lowcyl + (256 * highcyl); 951 952 thislen = blk_fs_request(rq) ? len : rq->data_len; 953 if (thislen > len) 954 thislen = len; 955 956 /* If DRQ is clear, the command has completed. */ 957 if ((stat & DRQ_STAT) == 0) { 958 if (blk_fs_request(rq)) { 959 /* 960 * If we're not done reading/writing, complain. 961 * Otherwise, complete the command normally. 962 */ 963 uptodate = 1; 964 if (rq->current_nr_sectors > 0) { 965 printk(KERN_ERR "%s: %s: data underrun " 966 "(%d blocks)\n", 967 drive->name, __func__, 968 rq->current_nr_sectors); 969 if (!write) 970 rq->cmd_flags |= REQ_FAILED; 971 uptodate = 0; 972 } 973 cdrom_end_request(drive, uptodate); 974 return ide_stopped; 975 } else if (!blk_pc_request(rq)) { 976 ide_cd_request_sense_fixup(rq); 977 /* complain if we still have data left to transfer */ 978 uptodate = rq->data_len ? 0 : 1; 979 } 980 goto end_request; 981 } 982 983 /* check which way to transfer data */ 984 if (ide_cd_check_ireason(drive, rq, len, ireason, write)) 985 return ide_stopped; 986 987 if (blk_fs_request(rq)) { 988 if (write == 0) { 989 int nskip; 990 991 if (ide_cd_check_transfer_size(drive, len)) { 992 cdrom_end_request(drive, 0); 993 return ide_stopped; 994 } 995 996 /* 997 * First, figure out if we need to bit-bucket 998 * any of the leading sectors. 999 */ 1000 nskip = min_t(int, rq->current_nr_sectors 1001 - bio_cur_sectors(rq->bio), 1002 thislen >> 9); 1003 if (nskip > 0) { 1004 ide_cd_drain_data(drive, nskip); 1005 rq->current_nr_sectors -= nskip; 1006 thislen -= (nskip << 9); 1007 } 1008 } 1009 } 1010 1011 if (ireason == 0) { 1012 write = 1; 1013 xferfunc = hwif->output_data; 1014 } else { 1015 write = 0; 1016 xferfunc = hwif->input_data; 1017 } 1018 1019 /* transfer data */ 1020 while (thislen > 0) { 1021 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data; 1022 int blen = rq->data_len; 1023 1024 /* bio backed? */ 1025 if (rq->bio) { 1026 if (blk_fs_request(rq)) { 1027 ptr = rq->buffer; 1028 blen = rq->current_nr_sectors << 9; 1029 } else { 1030 ptr = bio_data(rq->bio); 1031 blen = bio_iovec(rq->bio)->bv_len; 1032 } 1033 } 1034 1035 if (!ptr) { 1036 if (blk_fs_request(rq) && !write) 1037 /* 1038 * If the buffers are full, pipe the rest into 1039 * oblivion. 1040 */ 1041 ide_cd_drain_data(drive, thislen >> 9); 1042 else { 1043 printk(KERN_ERR "%s: confused, missing data\n", 1044 drive->name); 1045 blk_dump_rq_flags(rq, rq_data_dir(rq) 1046 ? "cdrom_newpc_intr, write" 1047 : "cdrom_newpc_intr, read"); 1048 } 1049 break; 1050 } 1051 1052 if (blen > thislen) 1053 blen = thislen; 1054 1055 xferfunc(drive, NULL, ptr, blen); 1056 1057 thislen -= blen; 1058 len -= blen; 1059 1060 if (blk_fs_request(rq)) { 1061 rq->buffer += blen; 1062 rq->nr_sectors -= (blen >> 9); 1063 rq->current_nr_sectors -= (blen >> 9); 1064 rq->sector += (blen >> 9); 1065 1066 if (rq->current_nr_sectors == 0 && rq->nr_sectors) 1067 cdrom_end_request(drive, 1); 1068 } else { 1069 rq->data_len -= blen; 1070 1071 /* 1072 * The request can't be completed until DRQ is cleared. 1073 * So complete the data, but don't complete the request 1074 * using the dummy function for the callback feature 1075 * of blk_end_request_callback(). 1076 */ 1077 if (rq->bio) 1078 blk_end_request_callback(rq, 0, blen, 1079 cdrom_newpc_intr_dummy_cb); 1080 else 1081 rq->data += blen; 1082 } 1083 if (!write && blk_sense_request(rq)) 1084 rq->sense_len += blen; 1085 } 1086 1087 /* pad, if necessary */ 1088 if (!blk_fs_request(rq) && len > 0) 1089 ide_cd_pad_transfer(drive, xferfunc, len); 1090 1091 if (blk_pc_request(rq)) { 1092 timeout = rq->timeout; 1093 } else { 1094 timeout = ATAPI_WAIT_PC; 1095 if (!blk_fs_request(rq)) 1096 expiry = cdrom_timer_expiry; 1097 } 1098 1099 ide_set_handler(drive, cdrom_newpc_intr, timeout, expiry); 1100 return ide_started; 1101 1102end_request: 1103 if (blk_pc_request(rq)) { 1104 unsigned long flags; 1105 unsigned int dlen = rq->data_len; 1106 1107 if (dma) 1108 rq->data_len = 0; 1109 1110 spin_lock_irqsave(&ide_lock, flags); 1111 if (__blk_end_request(rq, 0, dlen)) 1112 BUG(); 1113 HWGROUP(drive)->rq = NULL; 1114 spin_unlock_irqrestore(&ide_lock, flags); 1115 } else { 1116 if (!uptodate) 1117 rq->cmd_flags |= REQ_FAILED; 1118 cdrom_end_request(drive, uptodate); 1119 } 1120 return ide_stopped; 1121} 1122 1123static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq) 1124{ 1125 struct cdrom_info *cd = drive->driver_data; 1126 int write = rq_data_dir(rq) == WRITE; 1127 unsigned short sectors_per_frame = 1128 queue_hardsect_size(drive->queue) >> SECTOR_BITS; 1129 1130 if (write) { 1131 /* disk has become write protected */ 1132 if (cd->disk->policy) { 1133 cdrom_end_request(drive, 0); 1134 return ide_stopped; 1135 } 1136 } else { 1137 /* 1138 * We may be retrying this request after an error. Fix up any 1139 * weirdness which might be present in the request packet. 1140 */ 1141 restore_request(rq); 1142 } 1143 1144 /* use DMA, if possible / writes *must* be hardware frame aligned */ 1145 if ((rq->nr_sectors & (sectors_per_frame - 1)) || 1146 (rq->sector & (sectors_per_frame - 1))) { 1147 if (write) { 1148 cdrom_end_request(drive, 0); 1149 return ide_stopped; 1150 } 1151 cd->dma = 0; 1152 } else 1153 cd->dma = drive->using_dma; 1154 1155 if (write) 1156 cd->devinfo.media_written = 1; 1157 1158 /* start sending the read/write request to the drive */ 1159 return cdrom_start_packet_command(drive, 32768, cdrom_start_rw_cont); 1160} 1161 1162static ide_startstop_t cdrom_do_newpc_cont(ide_drive_t *drive) 1163{ 1164 struct request *rq = HWGROUP(drive)->rq; 1165 1166 if (!rq->timeout) 1167 rq->timeout = ATAPI_WAIT_PC; 1168 1169 return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr); 1170} 1171 1172static ide_startstop_t cdrom_do_block_pc(ide_drive_t *drive, struct request *rq) 1173{ 1174 struct cdrom_info *info = drive->driver_data; 1175 1176 if (blk_pc_request(rq)) 1177 rq->cmd_flags |= REQ_QUIET; 1178 else 1179 rq->cmd_flags &= ~REQ_FAILED; 1180 1181 info->dma = 0; 1182 1183 /* sg request */ 1184 if (rq->bio) { 1185 int mask = drive->queue->dma_alignment; 1186 unsigned long addr = 1187 (unsigned long)page_address(bio_page(rq->bio)); 1188 1189 info->dma = drive->using_dma; 1190 1191 /* 1192 * check if dma is safe 1193 * 1194 * NOTE! The "len" and "addr" checks should possibly have 1195 * separate masks. 1196 */ 1197 if ((rq->data_len & 15) || (addr & mask)) 1198 info->dma = 0; 1199 } 1200 1201 /* start sending the command to the drive */ 1202 return cdrom_start_packet_command(drive, rq->data_len, 1203 cdrom_do_newpc_cont); 1204} 1205 1206/* 1207 * cdrom driver request routine. 1208 */ 1209static ide_startstop_t ide_do_rw_cdrom(ide_drive_t *drive, struct request *rq, 1210 sector_t block) 1211{ 1212 ide_startstop_t action; 1213 struct cdrom_info *info = drive->driver_data; 1214 1215 if (blk_fs_request(rq)) { 1216 if (info->cd_flags & IDE_CD_FLAG_SEEKING) { 1217 unsigned long elapsed = jiffies - info->start_seek; 1218 int stat = ide_read_status(drive); 1219 1220 if ((stat & SEEK_STAT) != SEEK_STAT) { 1221 if (elapsed < IDECD_SEEK_TIMEOUT) { 1222 ide_stall_queue(drive, 1223 IDECD_SEEK_TIMER); 1224 return ide_stopped; 1225 } 1226 printk(KERN_ERR "%s: DSC timeout\n", 1227 drive->name); 1228 } 1229 info->cd_flags &= ~IDE_CD_FLAG_SEEKING; 1230 } 1231 if (rq_data_dir(rq) == READ && 1232 IDE_LARGE_SEEK(info->last_block, block, 1233 IDECD_SEEK_THRESHOLD) && 1234 drive->dsc_overlap) 1235 action = cdrom_start_seek(drive, block); 1236 else 1237 action = cdrom_start_rw(drive, rq); 1238 info->last_block = block; 1239 return action; 1240 } else if (blk_sense_request(rq) || blk_pc_request(rq) || 1241 rq->cmd_type == REQ_TYPE_ATA_PC) { 1242 return cdrom_do_block_pc(drive, rq); 1243 } else if (blk_special_request(rq)) { 1244 /* right now this can only be a reset... */ 1245 cdrom_end_request(drive, 1); 1246 return ide_stopped; 1247 } 1248 1249 blk_dump_rq_flags(rq, "ide-cd bad flags"); 1250 cdrom_end_request(drive, 0); 1251 return ide_stopped; 1252} 1253 1254 1255 1256/* 1257 * Ioctl handling. 1258 * 1259 * Routines which queue packet commands take as a final argument a pointer to a 1260 * request_sense struct. If execution of the command results in an error with a 1261 * CHECK CONDITION status, this structure will be filled with the results of the 1262 * subsequent request sense command. The pointer can also be NULL, in which case 1263 * no sense information is returned. 1264 */ 1265static void msf_from_bcd(struct atapi_msf *msf) 1266{ 1267 msf->minute = BCD2BIN(msf->minute); 1268 msf->second = BCD2BIN(msf->second); 1269 msf->frame = BCD2BIN(msf->frame); 1270} 1271 1272int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense) 1273{ 1274 struct request req; 1275 struct cdrom_info *info = drive->driver_data; 1276 struct cdrom_device_info *cdi = &info->devinfo; 1277 1278 ide_cd_init_rq(drive, &req); 1279 1280 req.sense = sense; 1281 req.cmd[0] = GPCMD_TEST_UNIT_READY; 1282 req.cmd_flags |= REQ_QUIET; 1283 1284 /* 1285 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs 1286 * instead of supporting the LOAD_UNLOAD opcode. 1287 */ 1288 req.cmd[7] = cdi->sanyo_slot % 3; 1289 1290 return ide_cd_queue_pc(drive, &req); 1291} 1292 1293static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity, 1294 unsigned long *sectors_per_frame, 1295 struct request_sense *sense) 1296{ 1297 struct { 1298 __u32 lba; 1299 __u32 blocklen; 1300 } capbuf; 1301 1302 int stat; 1303 struct request req; 1304 1305 ide_cd_init_rq(drive, &req); 1306 1307 req.sense = sense; 1308 req.cmd[0] = GPCMD_READ_CDVD_CAPACITY; 1309 req.data = (char *)&capbuf; 1310 req.data_len = sizeof(capbuf); 1311 req.cmd_flags |= REQ_QUIET; 1312 1313 stat = ide_cd_queue_pc(drive, &req); 1314 if (stat == 0) { 1315 *capacity = 1 + be32_to_cpu(capbuf.lba); 1316 *sectors_per_frame = 1317 be32_to_cpu(capbuf.blocklen) >> SECTOR_BITS; 1318 } 1319 1320 return stat; 1321} 1322 1323static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag, 1324 int format, char *buf, int buflen, 1325 struct request_sense *sense) 1326{ 1327 struct request req; 1328 1329 ide_cd_init_rq(drive, &req); 1330 1331 req.sense = sense; 1332 req.data = buf; 1333 req.data_len = buflen; 1334 req.cmd_flags |= REQ_QUIET; 1335 req.cmd[0] = GPCMD_READ_TOC_PMA_ATIP; 1336 req.cmd[6] = trackno; 1337 req.cmd[7] = (buflen >> 8); 1338 req.cmd[8] = (buflen & 0xff); 1339 req.cmd[9] = (format << 6); 1340 1341 if (msf_flag) 1342 req.cmd[1] = 2; 1343 1344 return ide_cd_queue_pc(drive, &req); 1345} 1346 1347/* Try to read the entire TOC for the disk into our internal buffer. */ 1348int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense) 1349{ 1350 int stat, ntracks, i; 1351 struct cdrom_info *info = drive->driver_data; 1352 struct cdrom_device_info *cdi = &info->devinfo; 1353 struct atapi_toc *toc = info->toc; 1354 struct { 1355 struct atapi_toc_header hdr; 1356 struct atapi_toc_entry ent; 1357 } ms_tmp; 1358 long last_written; 1359 unsigned long sectors_per_frame = SECTORS_PER_FRAME; 1360 1361 if (toc == NULL) { 1362 /* try to allocate space */ 1363 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL); 1364 if (toc == NULL) { 1365 printk(KERN_ERR "%s: No cdrom TOC buffer!\n", 1366 drive->name); 1367 return -ENOMEM; 1368 } 1369 info->toc = toc; 1370 } 1371 1372 /* 1373 * Check to see if the existing data is still valid. If it is, 1374 * just return. 1375 */ 1376 (void) cdrom_check_status(drive, sense); 1377 1378 if (info->cd_flags & IDE_CD_FLAG_TOC_VALID) 1379 return 0; 1380 1381 /* try to get the total cdrom capacity and sector size */ 1382 stat = cdrom_read_capacity(drive, &toc->capacity, §ors_per_frame, 1383 sense); 1384 if (stat) 1385 toc->capacity = 0x1fffff; 1386 1387 set_capacity(info->disk, toc->capacity * sectors_per_frame); 1388 /* save a private copy of the TOC capacity for error handling */ 1389 drive->probed_capacity = toc->capacity * sectors_per_frame; 1390 1391 blk_queue_hardsect_size(drive->queue, 1392 sectors_per_frame << SECTOR_BITS); 1393 1394 /* first read just the header, so we know how long the TOC is */ 1395 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr, 1396 sizeof(struct atapi_toc_header), sense); 1397 if (stat) 1398 return stat; 1399 1400 if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) { 1401 toc->hdr.first_track = BCD2BIN(toc->hdr.first_track); 1402 toc->hdr.last_track = BCD2BIN(toc->hdr.last_track); 1403 } 1404 1405 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1; 1406 if (ntracks <= 0) 1407 return -EIO; 1408 if (ntracks > MAX_TRACKS) 1409 ntracks = MAX_TRACKS; 1410 1411 /* now read the whole schmeer */ 1412 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0, 1413 (char *)&toc->hdr, 1414 sizeof(struct atapi_toc_header) + 1415 (ntracks + 1) * 1416 sizeof(struct atapi_toc_entry), sense); 1417 1418 if (stat && toc->hdr.first_track > 1) { 1419 /* 1420 * Cds with CDI tracks only don't have any TOC entries, despite 1421 * of this the returned values are 1422 * first_track == last_track = number of CDI tracks + 1, 1423 * so that this case is indistinguishable from the same layout 1424 * plus an additional audio track. If we get an error for the 1425 * regular case, we assume a CDI without additional audio 1426 * tracks. In this case the readable TOC is empty (CDI tracks 1427 * are not included) and only holds the Leadout entry. 1428 * 1429 * Heiko Eißfeldt. 1430 */ 1431 ntracks = 0; 1432 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0, 1433 (char *)&toc->hdr, 1434 sizeof(struct atapi_toc_header) + 1435 (ntracks + 1) * 1436 sizeof(struct atapi_toc_entry), 1437 sense); 1438 if (stat) 1439 return stat; 1440 1441 if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) { 1442 toc->hdr.first_track = (u8)BIN2BCD(CDROM_LEADOUT); 1443 toc->hdr.last_track = (u8)BIN2BCD(CDROM_LEADOUT); 1444 } else { 1445 toc->hdr.first_track = CDROM_LEADOUT; 1446 toc->hdr.last_track = CDROM_LEADOUT; 1447 } 1448 } 1449 1450 if (stat) 1451 return stat; 1452 1453 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length); 1454 1455 if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) { 1456 toc->hdr.first_track = BCD2BIN(toc->hdr.first_track); 1457 toc->hdr.last_track = BCD2BIN(toc->hdr.last_track); 1458 } 1459 1460 for (i = 0; i <= ntracks; i++) { 1461 if (info->cd_flags & IDE_CD_FLAG_TOCADDR_AS_BCD) { 1462 if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) 1463 toc->ent[i].track = BCD2BIN(toc->ent[i].track); 1464 msf_from_bcd(&toc->ent[i].addr.msf); 1465 } 1466 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute, 1467 toc->ent[i].addr.msf.second, 1468 toc->ent[i].addr.msf.frame); 1469 } 1470 1471 if (toc->hdr.first_track != CDROM_LEADOUT) { 1472 /* read the multisession information */ 1473 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp, 1474 sizeof(ms_tmp), sense); 1475 if (stat) 1476 return stat; 1477 1478 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba); 1479 } else { 1480 ms_tmp.hdr.last_track = CDROM_LEADOUT; 1481 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track; 1482 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */ 1483 } 1484 1485 if (info->cd_flags & IDE_CD_FLAG_TOCADDR_AS_BCD) { 1486 /* re-read multisession information using MSF format */ 1487 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp, 1488 sizeof(ms_tmp), sense); 1489 if (stat) 1490 return stat; 1491 1492 msf_from_bcd(&ms_tmp.ent.addr.msf); 1493 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute, 1494 ms_tmp.ent.addr.msf.second, 1495 ms_tmp.ent.addr.msf.frame); 1496 } 1497 1498 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track); 1499 1500 /* now try to get the total cdrom capacity */ 1501 stat = cdrom_get_last_written(cdi, &last_written); 1502 if (!stat && (last_written > toc->capacity)) { 1503 toc->capacity = last_written; 1504 set_capacity(info->disk, toc->capacity * sectors_per_frame); 1505 drive->probed_capacity = toc->capacity * sectors_per_frame; 1506 } 1507 1508 /* Remember that we've read this stuff. */ 1509 info->cd_flags |= IDE_CD_FLAG_TOC_VALID; 1510 1511 return 0; 1512} 1513 1514int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf) 1515{ 1516 struct cdrom_info *info = drive->driver_data; 1517 struct cdrom_device_info *cdi = &info->devinfo; 1518 struct packet_command cgc; 1519 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE; 1520 1521 if ((info->cd_flags & IDE_CD_FLAG_FULL_CAPS_PAGE) == 0) 1522 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE; 1523 1524 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN); 1525 do { 1526 /* we seem to get stat=0x01,err=0x00 the first time (??) */ 1527 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0); 1528 if (!stat) 1529 break; 1530 } while (--attempts); 1531 return stat; 1532} 1533 1534void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf) 1535{ 1536 struct cdrom_info *cd = drive->driver_data; 1537 u16 curspeed, maxspeed; 1538 1539 curspeed = *(u16 *)&buf[8 + 14]; 1540 maxspeed = *(u16 *)&buf[8 + 8]; 1541 1542 if (cd->cd_flags & IDE_CD_FLAG_LE_SPEED_FIELDS) { 1543 curspeed = le16_to_cpu(curspeed); 1544 maxspeed = le16_to_cpu(maxspeed); 1545 } else { 1546 curspeed = be16_to_cpu(curspeed); 1547 maxspeed = be16_to_cpu(maxspeed); 1548 } 1549 1550 cd->current_speed = (curspeed + (176/2)) / 176; 1551 cd->max_speed = (maxspeed + (176/2)) / 176; 1552} 1553 1554#define IDE_CD_CAPABILITIES \ 1555 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \ 1556 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \ 1557 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \ 1558 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \ 1559 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM) 1560 1561static struct cdrom_device_ops ide_cdrom_dops = { 1562 .open = ide_cdrom_open_real, 1563 .release = ide_cdrom_release_real, 1564 .drive_status = ide_cdrom_drive_status, 1565 .media_changed = ide_cdrom_check_media_change_real, 1566 .tray_move = ide_cdrom_tray_move, 1567 .lock_door = ide_cdrom_lock_door, 1568 .select_speed = ide_cdrom_select_speed, 1569 .get_last_session = ide_cdrom_get_last_session, 1570 .get_mcn = ide_cdrom_get_mcn, 1571 .reset = ide_cdrom_reset, 1572 .audio_ioctl = ide_cdrom_audio_ioctl, 1573 .capability = IDE_CD_CAPABILITIES, 1574 .generic_packet = ide_cdrom_packet, 1575}; 1576 1577static int ide_cdrom_register(ide_drive_t *drive, int nslots) 1578{ 1579 struct cdrom_info *info = drive->driver_data; 1580 struct cdrom_device_info *devinfo = &info->devinfo; 1581 1582 devinfo->ops = &ide_cdrom_dops; 1583 devinfo->speed = info->current_speed; 1584 devinfo->capacity = nslots; 1585 devinfo->handle = drive; 1586 strcpy(devinfo->name, drive->name); 1587 1588 if (info->cd_flags & IDE_CD_FLAG_NO_SPEED_SELECT) 1589 devinfo->mask |= CDC_SELECT_SPEED; 1590 1591 devinfo->disk = info->disk; 1592 return register_cdrom(devinfo); 1593} 1594 1595static int ide_cdrom_probe_capabilities(ide_drive_t *drive) 1596{ 1597 struct cdrom_info *cd = drive->driver_data; 1598 struct cdrom_device_info *cdi = &cd->devinfo; 1599 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE]; 1600 mechtype_t mechtype; 1601 int nslots = 1; 1602 1603 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R | 1604 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO | 1605 CDC_MO_DRIVE | CDC_RAM); 1606 1607 if (drive->media == ide_optical) { 1608 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM); 1609 printk(KERN_ERR "%s: ATAPI magneto-optical drive\n", 1610 drive->name); 1611 return nslots; 1612 } 1613 1614 if (cd->cd_flags & IDE_CD_FLAG_PRE_ATAPI12) { 1615 cd->cd_flags &= ~IDE_CD_FLAG_NO_EJECT; 1616 cdi->mask &= ~CDC_PLAY_AUDIO; 1617 return nslots; 1618 } 1619 1620 /* 1621 * We have to cheat a little here. the packet will eventually be queued 1622 * with ide_cdrom_packet(), which extracts the drive from cdi->handle. 1623 * Since this device hasn't been registered with the Uniform layer yet, 1624 * it can't do this. Same goes for cdi->ops. 1625 */ 1626 cdi->handle = drive; 1627 cdi->ops = &ide_cdrom_dops; 1628 1629 if (ide_cdrom_get_capabilities(drive, buf)) 1630 return 0; 1631 1632 if ((buf[8 + 6] & 0x01) == 0) 1633 cd->cd_flags |= IDE_CD_FLAG_NO_DOORLOCK; 1634 if (buf[8 + 6] & 0x08) 1635 cd->cd_flags &= ~IDE_CD_FLAG_NO_EJECT; 1636 if (buf[8 + 3] & 0x01) 1637 cdi->mask &= ~CDC_CD_R; 1638 if (buf[8 + 3] & 0x02) 1639 cdi->mask &= ~(CDC_CD_RW | CDC_RAM); 1640 if (buf[8 + 2] & 0x38) 1641 cdi->mask &= ~CDC_DVD; 1642 if (buf[8 + 3] & 0x20) 1643 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM); 1644 if (buf[8 + 3] & 0x10) 1645 cdi->mask &= ~CDC_DVD_R; 1646 if ((buf[8 + 4] & 0x01) || (cd->cd_flags & IDE_CD_FLAG_PLAY_AUDIO_OK)) 1647 cdi->mask &= ~CDC_PLAY_AUDIO; 1648 1649 mechtype = buf[8 + 6] >> 5; 1650 if (mechtype == mechtype_caddy || mechtype == mechtype_popup) 1651 cdi->mask |= CDC_CLOSE_TRAY; 1652 1653 if (cdi->sanyo_slot > 0) { 1654 cdi->mask &= ~CDC_SELECT_DISC; 1655 nslots = 3; 1656 } else if (mechtype == mechtype_individual_changer || 1657 mechtype == mechtype_cartridge_changer) { 1658 nslots = cdrom_number_of_slots(cdi); 1659 if (nslots > 1) 1660 cdi->mask &= ~CDC_SELECT_DISC; 1661 } 1662 1663 ide_cdrom_update_speed(drive, buf); 1664 1665 printk(KERN_INFO "%s: ATAPI", drive->name); 1666 1667 /* don't print speed if the drive reported 0 */ 1668 if (cd->max_speed) 1669 printk(KERN_CONT " %dX", cd->max_speed); 1670 1671 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM"); 1672 1673 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0) 1674 printk(KERN_CONT " DVD%s%s", 1675 (cdi->mask & CDC_DVD_R) ? "" : "-R", 1676 (cdi->mask & CDC_DVD_RAM) ? "" : "-RAM"); 1677 1678 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0) 1679 printk(KERN_CONT " CD%s%s", 1680 (cdi->mask & CDC_CD_R) ? "" : "-R", 1681 (cdi->mask & CDC_CD_RW) ? "" : "/RW"); 1682 1683 if ((cdi->mask & CDC_SELECT_DISC) == 0) 1684 printk(KERN_CONT " changer w/%d slots", nslots); 1685 else 1686 printk(KERN_CONT " drive"); 1687 1688 printk(KERN_CONT ", %dkB Cache\n", be16_to_cpu(*(u16 *)&buf[8 + 12])); 1689 1690 return nslots; 1691} 1692 1693/* standard prep_rq_fn that builds 10 byte cmds */ 1694static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq) 1695{ 1696 int hard_sect = queue_hardsect_size(q); 1697 long block = (long)rq->hard_sector / (hard_sect >> 9); 1698 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9); 1699 1700 memset(rq->cmd, 0, sizeof(rq->cmd)); 1701 1702 if (rq_data_dir(rq) == READ) 1703 rq->cmd[0] = GPCMD_READ_10; 1704 else 1705 rq->cmd[0] = GPCMD_WRITE_10; 1706 1707 /* 1708 * fill in lba 1709 */ 1710 rq->cmd[2] = (block >> 24) & 0xff; 1711 rq->cmd[3] = (block >> 16) & 0xff; 1712 rq->cmd[4] = (block >> 8) & 0xff; 1713 rq->cmd[5] = block & 0xff; 1714 1715 /* 1716 * and transfer length 1717 */ 1718 rq->cmd[7] = (blocks >> 8) & 0xff; 1719 rq->cmd[8] = blocks & 0xff; 1720 rq->cmd_len = 10; 1721 return BLKPREP_OK; 1722} 1723 1724/* 1725 * Most of the SCSI commands are supported directly by ATAPI devices. 1726 * This transform handles the few exceptions. 1727 */ 1728static int ide_cdrom_prep_pc(struct request *rq) 1729{ 1730 u8 *c = rq->cmd; 1731 1732 /* transform 6-byte read/write commands to the 10-byte version */ 1733 if (c[0] == READ_6 || c[0] == WRITE_6) { 1734 c[8] = c[4]; 1735 c[5] = c[3]; 1736 c[4] = c[2]; 1737 c[3] = c[1] & 0x1f; 1738 c[2] = 0; 1739 c[1] &= 0xe0; 1740 c[0] += (READ_10 - READ_6); 1741 rq->cmd_len = 10; 1742 return BLKPREP_OK; 1743 } 1744 1745 /* 1746 * it's silly to pretend we understand 6-byte sense commands, just 1747 * reject with ILLEGAL_REQUEST and the caller should take the 1748 * appropriate action 1749 */ 1750 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) { 1751 rq->errors = ILLEGAL_REQUEST; 1752 return BLKPREP_KILL; 1753 } 1754 1755 return BLKPREP_OK; 1756} 1757 1758static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq) 1759{ 1760 if (blk_fs_request(rq)) 1761 return ide_cdrom_prep_fs(q, rq); 1762 else if (blk_pc_request(rq)) 1763 return ide_cdrom_prep_pc(rq); 1764 1765 return 0; 1766} 1767 1768struct cd_list_entry { 1769 const char *id_model; 1770 const char *id_firmware; 1771 unsigned int cd_flags; 1772}; 1773 1774#ifdef CONFIG_IDE_PROC_FS 1775static sector_t ide_cdrom_capacity(ide_drive_t *drive) 1776{ 1777 unsigned long capacity, sectors_per_frame; 1778 1779 if (cdrom_read_capacity(drive, &capacity, §ors_per_frame, NULL)) 1780 return 0; 1781 1782 return capacity * sectors_per_frame; 1783} 1784 1785static int proc_idecd_read_capacity(char *page, char **start, off_t off, 1786 int count, int *eof, void *data) 1787{ 1788 ide_drive_t *drive = data; 1789 int len; 1790 1791 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive)); 1792 PROC_IDE_READ_RETURN(page, start, off, count, eof, len); 1793} 1794 1795static ide_proc_entry_t idecd_proc[] = { 1796 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL }, 1797 { NULL, 0, NULL, NULL } 1798}; 1799 1800static void ide_cdrom_add_settings(ide_drive_t *drive) 1801{ 1802 ide_add_setting(drive, "dsc_overlap", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1, 1803 &drive->dsc_overlap, NULL); 1804} 1805#else 1806static inline void ide_cdrom_add_settings(ide_drive_t *drive) { ; } 1807#endif 1808 1809static const struct cd_list_entry ide_cd_quirks_list[] = { 1810 /* Limit transfer size per interrupt. */ 1811 { "SAMSUNG CD-ROM SCR-2430", NULL, IDE_CD_FLAG_LIMIT_NFRAMES }, 1812 { "SAMSUNG CD-ROM SCR-2432", NULL, IDE_CD_FLAG_LIMIT_NFRAMES }, 1813 /* SCR-3231 doesn't support the SET_CD_SPEED command. */ 1814 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_CD_FLAG_NO_SPEED_SELECT }, 1815 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */ 1816 { "NEC CD-ROM DRIVE:260", "1.01", IDE_CD_FLAG_TOCADDR_AS_BCD | 1817 IDE_CD_FLAG_PRE_ATAPI12, }, 1818 /* Vertos 300, some versions of this drive like to talk BCD. */ 1819 { "V003S0DS", NULL, IDE_CD_FLAG_VERTOS_300_SSD, }, 1820 /* Vertos 600 ESD. */ 1821 { "V006E0DS", NULL, IDE_CD_FLAG_VERTOS_600_ESD, }, 1822 /* 1823 * Sanyo 3 CD changer uses a non-standard command for CD changing 1824 * (by default standard ATAPI support for CD changers is used). 1825 */ 1826 { "CD-ROM CDR-C3 G", NULL, IDE_CD_FLAG_SANYO_3CD }, 1827 { "CD-ROM CDR-C3G", NULL, IDE_CD_FLAG_SANYO_3CD }, 1828 { "CD-ROM CDR_C36", NULL, IDE_CD_FLAG_SANYO_3CD }, 1829 /* Stingray 8X CD-ROM. */ 1830 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_CD_FLAG_PRE_ATAPI12}, 1831 /* 1832 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length 1833 * mode sense page capabilities size, but older drives break. 1834 */ 1835 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_CD_FLAG_FULL_CAPS_PAGE }, 1836 { "WPI CDS-32X", NULL, IDE_CD_FLAG_FULL_CAPS_PAGE }, 1837 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */ 1838 { "", "241N", IDE_CD_FLAG_LE_SPEED_FIELDS }, 1839 /* 1840 * Some drives used by Apple don't advertise audio play 1841 * but they do support reading TOC & audio datas. 1842 */ 1843 { "MATSHITADVD-ROM SR-8187", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK }, 1844 { "MATSHITADVD-ROM SR-8186", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK }, 1845 { "MATSHITADVD-ROM SR-8176", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK }, 1846 { "MATSHITADVD-ROM SR-8174", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK }, 1847 { "Optiarc DVD RW AD-5200A", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK }, 1848 { NULL, NULL, 0 } 1849}; 1850 1851static unsigned int ide_cd_flags(struct hd_driveid *id) 1852{ 1853 const struct cd_list_entry *cle = ide_cd_quirks_list; 1854 1855 while (cle->id_model) { 1856 if (strcmp(cle->id_model, id->model) == 0 && 1857 (cle->id_firmware == NULL || 1858 strstr(id->fw_rev, cle->id_firmware))) 1859 return cle->cd_flags; 1860 cle++; 1861 } 1862 1863 return 0; 1864} 1865 1866static int ide_cdrom_setup(ide_drive_t *drive) 1867{ 1868 struct cdrom_info *cd = drive->driver_data; 1869 struct cdrom_device_info *cdi = &cd->devinfo; 1870 struct hd_driveid *id = drive->id; 1871 int nslots; 1872 1873 blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn); 1874 blk_queue_dma_alignment(drive->queue, 31); 1875 drive->queue->unplug_delay = (1 * HZ) / 1000; 1876 if (!drive->queue->unplug_delay) 1877 drive->queue->unplug_delay = 1; 1878 1879 drive->special.all = 0; 1880 1881 cd->cd_flags = IDE_CD_FLAG_MEDIA_CHANGED | IDE_CD_FLAG_NO_EJECT | 1882 ide_cd_flags(id); 1883 1884 if ((id->config & 0x0060) == 0x20) 1885 cd->cd_flags |= IDE_CD_FLAG_DRQ_INTERRUPT; 1886 1887 if ((cd->cd_flags & IDE_CD_FLAG_VERTOS_300_SSD) && 1888 id->fw_rev[4] == '1' && id->fw_rev[6] <= '2') 1889 cd->cd_flags |= (IDE_CD_FLAG_TOCTRACKS_AS_BCD | 1890 IDE_CD_FLAG_TOCADDR_AS_BCD); 1891 else if ((cd->cd_flags & IDE_CD_FLAG_VERTOS_600_ESD) && 1892 id->fw_rev[4] == '1' && id->fw_rev[6] <= '2') 1893 cd->cd_flags |= IDE_CD_FLAG_TOCTRACKS_AS_BCD; 1894 else if (cd->cd_flags & IDE_CD_FLAG_SANYO_3CD) 1895 /* 3 => use CD in slot 0 */ 1896 cdi->sanyo_slot = 3; 1897 1898 nslots = ide_cdrom_probe_capabilities(drive); 1899 1900 /* set correct block size */ 1901 blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE); 1902 1903 drive->dsc_overlap = (drive->next != drive); 1904 1905 if (ide_cdrom_register(drive, nslots)) { 1906 printk(KERN_ERR "%s: %s failed to register device with the" 1907 " cdrom driver.\n", drive->name, __func__); 1908 cd->devinfo.handle = NULL; 1909 return 1; 1910 } 1911 ide_cdrom_add_settings(drive); 1912 return 0; 1913} 1914 1915static void ide_cd_remove(ide_drive_t *drive) 1916{ 1917 struct cdrom_info *info = drive->driver_data; 1918 1919 ide_proc_unregister_driver(drive, info->driver); 1920 1921 del_gendisk(info->disk); 1922 1923 ide_cd_put(info); 1924} 1925 1926static void ide_cd_release(struct kref *kref) 1927{ 1928 struct cdrom_info *info = to_ide_cd(kref); 1929 struct cdrom_device_info *devinfo = &info->devinfo; 1930 ide_drive_t *drive = info->drive; 1931 struct gendisk *g = info->disk; 1932 1933 kfree(info->toc); 1934 if (devinfo->handle == drive) 1935 unregister_cdrom(devinfo); 1936 drive->dsc_overlap = 0; 1937 drive->driver_data = NULL; 1938 blk_queue_prep_rq(drive->queue, NULL); 1939 g->private_data = NULL; 1940 put_disk(g); 1941 kfree(info); 1942} 1943 1944static int ide_cd_probe(ide_drive_t *); 1945 1946static ide_driver_t ide_cdrom_driver = { 1947 .gen_driver = { 1948 .owner = THIS_MODULE, 1949 .name = "ide-cdrom", 1950 .bus = &ide_bus_type, 1951 }, 1952 .probe = ide_cd_probe, 1953 .remove = ide_cd_remove, 1954 .version = IDECD_VERSION, 1955 .media = ide_cdrom, 1956 .supports_dsc_overlap = 1, 1957 .do_request = ide_do_rw_cdrom, 1958 .end_request = ide_end_request, 1959 .error = __ide_error, 1960 .abort = __ide_abort, 1961#ifdef CONFIG_IDE_PROC_FS 1962 .proc = idecd_proc, 1963#endif 1964}; 1965 1966static int idecd_open(struct inode *inode, struct file *file) 1967{ 1968 struct gendisk *disk = inode->i_bdev->bd_disk; 1969 struct cdrom_info *info; 1970 int rc = -ENOMEM; 1971 1972 info = ide_cd_get(disk); 1973 if (!info) 1974 return -ENXIO; 1975 1976 rc = cdrom_open(&info->devinfo, inode, file); 1977 1978 if (rc < 0) 1979 ide_cd_put(info); 1980 1981 return rc; 1982} 1983 1984static int idecd_release(struct inode *inode, struct file *file) 1985{ 1986 struct gendisk *disk = inode->i_bdev->bd_disk; 1987 struct cdrom_info *info = ide_cd_g(disk); 1988 1989 cdrom_release(&info->devinfo, file); 1990 1991 ide_cd_put(info); 1992 1993 return 0; 1994} 1995 1996static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg) 1997{ 1998 struct packet_command cgc; 1999 char buffer[16]; 2000 int stat; 2001 char spindown; 2002 2003 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char))) 2004 return -EFAULT; 2005 2006 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN); 2007 2008 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0); 2009 if (stat) 2010 return stat; 2011 2012 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f); 2013 return cdrom_mode_select(cdi, &cgc); 2014} 2015 2016static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg) 2017{ 2018 struct packet_command cgc; 2019 char buffer[16]; 2020 int stat; 2021 char spindown; 2022 2023 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN); 2024 2025 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0); 2026 if (stat) 2027 return stat; 2028 2029 spindown = buffer[11] & 0x0f; 2030 if (copy_to_user((void __user *)arg, &spindown, sizeof(char))) 2031 return -EFAULT; 2032 return 0; 2033} 2034 2035static int idecd_ioctl(struct inode *inode, struct file *file, 2036 unsigned int cmd, unsigned long arg) 2037{ 2038 struct block_device *bdev = inode->i_bdev; 2039 struct cdrom_info *info = ide_cd_g(bdev->bd_disk); 2040 int err; 2041 2042 switch (cmd) { 2043 case CDROMSETSPINDOWN: 2044 return idecd_set_spindown(&info->devinfo, arg); 2045 case CDROMGETSPINDOWN: 2046 return idecd_get_spindown(&info->devinfo, arg); 2047 default: 2048 break; 2049 } 2050 2051 err = generic_ide_ioctl(info->drive, file, bdev, cmd, arg); 2052 if (err == -EINVAL) 2053 err = cdrom_ioctl(file, &info->devinfo, inode, cmd, arg); 2054 2055 return err; 2056} 2057 2058static int idecd_media_changed(struct gendisk *disk) 2059{ 2060 struct cdrom_info *info = ide_cd_g(disk); 2061 return cdrom_media_changed(&info->devinfo); 2062} 2063 2064static int idecd_revalidate_disk(struct gendisk *disk) 2065{ 2066 struct cdrom_info *info = ide_cd_g(disk); 2067 struct request_sense sense; 2068 2069 ide_cd_read_toc(info->drive, &sense); 2070 2071 return 0; 2072} 2073 2074static struct block_device_operations idecd_ops = { 2075 .owner = THIS_MODULE, 2076 .open = idecd_open, 2077 .release = idecd_release, 2078 .ioctl = idecd_ioctl, 2079 .media_changed = idecd_media_changed, 2080 .revalidate_disk = idecd_revalidate_disk 2081}; 2082 2083/* module options */ 2084static char *ignore; 2085 2086module_param(ignore, charp, 0400); 2087MODULE_DESCRIPTION("ATAPI CD-ROM Driver"); 2088 2089static int ide_cd_probe(ide_drive_t *drive) 2090{ 2091 struct cdrom_info *info; 2092 struct gendisk *g; 2093 struct request_sense sense; 2094 2095 if (!strstr("ide-cdrom", drive->driver_req)) 2096 goto failed; 2097 if (!drive->present) 2098 goto failed; 2099 if (drive->media != ide_cdrom && drive->media != ide_optical) 2100 goto failed; 2101 /* skip drives that we were told to ignore */ 2102 if (ignore != NULL) { 2103 if (strstr(ignore, drive->name)) { 2104 printk(KERN_INFO "ide-cd: ignoring drive %s\n", 2105 drive->name); 2106 goto failed; 2107 } 2108 } 2109 if (drive->scsi) { 2110 printk(KERN_INFO "ide-cd: passing drive %s to ide-scsi " 2111 "emulation.\n", drive->name); 2112 goto failed; 2113 } 2114 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL); 2115 if (info == NULL) { 2116 printk(KERN_ERR "%s: Can't allocate a cdrom structure\n", 2117 drive->name); 2118 goto failed; 2119 } 2120 2121 g = alloc_disk(1 << PARTN_BITS); 2122 if (!g) 2123 goto out_free_cd; 2124 2125 ide_init_disk(g, drive); 2126 2127 ide_proc_register_driver(drive, &ide_cdrom_driver); 2128 2129 kref_init(&info->kref); 2130 2131 info->drive = drive; 2132 info->driver = &ide_cdrom_driver; 2133 info->disk = g; 2134 2135 g->private_data = &info->driver; 2136 2137 drive->driver_data = info; 2138 2139 g->minors = 1; 2140 g->driverfs_dev = &drive->gendev; 2141 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE; 2142 if (ide_cdrom_setup(drive)) { 2143 ide_proc_unregister_driver(drive, &ide_cdrom_driver); 2144 ide_cd_release(&info->kref); 2145 goto failed; 2146 } 2147 2148 ide_cd_read_toc(drive, &sense); 2149 g->fops = &idecd_ops; 2150 g->flags |= GENHD_FL_REMOVABLE; 2151 add_disk(g); 2152 return 0; 2153 2154out_free_cd: 2155 kfree(info); 2156failed: 2157 return -ENODEV; 2158} 2159 2160static void __exit ide_cdrom_exit(void) 2161{ 2162 driver_unregister(&ide_cdrom_driver.gen_driver); 2163} 2164 2165static int __init ide_cdrom_init(void) 2166{ 2167 return driver_register(&ide_cdrom_driver.gen_driver); 2168} 2169 2170MODULE_ALIAS("ide:*m-cdrom*"); 2171MODULE_ALIAS("ide-cd"); 2172module_init(ide_cdrom_init); 2173module_exit(ide_cdrom_exit); 2174MODULE_LICENSE("GPL"); 2175