ide-cd.c revision e8a96aa71355edef9f40ce01459acf25c50cb78c
1/* 2 * ATAPI CD-ROM driver. 3 * 4 * Copyright (C) 1994-1996 Scott Snyder <snyder@fnald0.fnal.gov> 5 * Copyright (C) 1996-1998 Erik Andersen <andersee@debian.org> 6 * Copyright (C) 1998-2000 Jens Axboe <axboe@suse.de> 7 * Copyright (C) 2005, 2007 Bartlomiej Zolnierkiewicz 8 * 9 * May be copied or modified under the terms of the GNU General Public 10 * License. See linux/COPYING for more information. 11 * 12 * See Documentation/cdrom/ide-cd for usage information. 13 * 14 * Suggestions are welcome. Patches that work are more welcome though. ;-) 15 * For those wishing to work on this driver, please be sure you download 16 * and comply with the latest Mt. Fuji (SFF8090 version 4) and ATAPI 17 * (SFF-8020i rev 2.6) standards. These documents can be obtained by 18 * anonymous ftp from: 19 * ftp://fission.dt.wdc.com/pub/standards/SFF_atapi/spec/SFF8020-r2.6/PS/8020r26.ps 20 * ftp://ftp.avc-pioneer.com/Mtfuji4/Spec/Fuji4r10.pdf 21 * 22 * For historical changelog please see: 23 * Documentation/ide/ChangeLog.ide-cd.1994-2004 24 */ 25 26#define IDECD_VERSION "5.00" 27 28#include <linux/module.h> 29#include <linux/types.h> 30#include <linux/kernel.h> 31#include <linux/delay.h> 32#include <linux/timer.h> 33#include <linux/slab.h> 34#include <linux/interrupt.h> 35#include <linux/errno.h> 36#include <linux/cdrom.h> 37#include <linux/ide.h> 38#include <linux/completion.h> 39#include <linux/mutex.h> 40#include <linux/bcd.h> 41 42/* For SCSI -> ATAPI command conversion */ 43#include <scsi/scsi.h> 44 45#include <linux/irq.h> 46#include <linux/io.h> 47#include <asm/byteorder.h> 48#include <linux/uaccess.h> 49#include <asm/unaligned.h> 50 51#include "ide-cd.h" 52 53static DEFINE_MUTEX(idecd_ref_mutex); 54 55#define to_ide_cd(obj) container_of(obj, struct cdrom_info, kref) 56 57#define ide_cd_g(disk) \ 58 container_of((disk)->private_data, struct cdrom_info, driver) 59 60static struct cdrom_info *ide_cd_get(struct gendisk *disk) 61{ 62 struct cdrom_info *cd = NULL; 63 64 mutex_lock(&idecd_ref_mutex); 65 cd = ide_cd_g(disk); 66 if (cd) 67 kref_get(&cd->kref); 68 mutex_unlock(&idecd_ref_mutex); 69 return cd; 70} 71 72static void ide_cd_release(struct kref *); 73 74static void ide_cd_put(struct cdrom_info *cd) 75{ 76 mutex_lock(&idecd_ref_mutex); 77 kref_put(&cd->kref, ide_cd_release); 78 mutex_unlock(&idecd_ref_mutex); 79} 80 81/* 82 * Generic packet command support and error handling routines. 83 */ 84 85/* Mark that we've seen a media change and invalidate our internal buffers. */ 86static void cdrom_saw_media_change(ide_drive_t *drive) 87{ 88 struct cdrom_info *cd = drive->driver_data; 89 90 cd->cd_flags |= IDE_CD_FLAG_MEDIA_CHANGED; 91 cd->cd_flags &= ~IDE_CD_FLAG_TOC_VALID; 92} 93 94static int cdrom_log_sense(ide_drive_t *drive, struct request *rq, 95 struct request_sense *sense) 96{ 97 int log = 0; 98 99 if (!sense || !rq || (rq->cmd_flags & REQ_QUIET)) 100 return 0; 101 102 switch (sense->sense_key) { 103 case NO_SENSE: 104 case RECOVERED_ERROR: 105 break; 106 case NOT_READY: 107 /* 108 * don't care about tray state messages for e.g. capacity 109 * commands or in-progress or becoming ready 110 */ 111 if (sense->asc == 0x3a || sense->asc == 0x04) 112 break; 113 log = 1; 114 break; 115 case ILLEGAL_REQUEST: 116 /* 117 * don't log START_STOP unit with LoEj set, since we cannot 118 * reliably check if drive can auto-close 119 */ 120 if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24) 121 break; 122 log = 1; 123 break; 124 case UNIT_ATTENTION: 125 /* 126 * Make good and sure we've seen this potential media change. 127 * Some drives (i.e. Creative) fail to present the correct sense 128 * key in the error register. 129 */ 130 cdrom_saw_media_change(drive); 131 break; 132 default: 133 log = 1; 134 break; 135 } 136 return log; 137} 138 139static void cdrom_analyze_sense_data(ide_drive_t *drive, 140 struct request *failed_command, 141 struct request_sense *sense) 142{ 143 unsigned long sector; 144 unsigned long bio_sectors; 145 struct cdrom_info *info = drive->driver_data; 146 147 if (!cdrom_log_sense(drive, failed_command, sense)) 148 return; 149 150 /* 151 * If a read toc is executed for a CD-R or CD-RW medium where the first 152 * toc has not been recorded yet, it will fail with 05/24/00 (which is a 153 * confusing error) 154 */ 155 if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP) 156 if (sense->sense_key == 0x05 && sense->asc == 0x24) 157 return; 158 159 /* current error */ 160 if (sense->error_code == 0x70) { 161 switch (sense->sense_key) { 162 case MEDIUM_ERROR: 163 case VOLUME_OVERFLOW: 164 case ILLEGAL_REQUEST: 165 if (!sense->valid) 166 break; 167 if (failed_command == NULL || 168 !blk_fs_request(failed_command)) 169 break; 170 sector = (sense->information[0] << 24) | 171 (sense->information[1] << 16) | 172 (sense->information[2] << 8) | 173 (sense->information[3]); 174 175 if (drive->queue->hardsect_size == 2048) 176 /* device sector size is 2K */ 177 sector <<= 2; 178 179 bio_sectors = max(bio_sectors(failed_command->bio), 4U); 180 sector &= ~(bio_sectors - 1); 181 182 if (sector < get_capacity(info->disk) && 183 drive->probed_capacity - sector < 4 * 75) 184 set_capacity(info->disk, sector); 185 } 186 } 187 188 ide_cd_log_error(drive->name, failed_command, sense); 189} 190 191/* Initialize a ide-cd packet command request */ 192void ide_cd_init_rq(ide_drive_t *drive, struct request *rq) 193{ 194 struct cdrom_info *cd = drive->driver_data; 195 196 ide_init_drive_cmd(rq); 197 rq->cmd_type = REQ_TYPE_ATA_PC; 198 rq->rq_disk = cd->disk; 199} 200 201static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense, 202 struct request *failed_command) 203{ 204 struct cdrom_info *info = drive->driver_data; 205 struct request *rq = &info->request_sense_request; 206 207 if (sense == NULL) 208 sense = &info->sense_data; 209 210 /* stuff the sense request in front of our current request */ 211 ide_cd_init_rq(drive, rq); 212 213 rq->data = sense; 214 rq->cmd[0] = GPCMD_REQUEST_SENSE; 215 rq->cmd[4] = 18; 216 rq->data_len = 18; 217 218 rq->cmd_type = REQ_TYPE_SENSE; 219 rq->cmd_flags |= REQ_PREEMPT; 220 221 /* NOTE! Save the failed command in "rq->buffer" */ 222 rq->buffer = (void *) failed_command; 223 224 (void) ide_do_drive_cmd(drive, rq, ide_preempt); 225} 226 227static void cdrom_end_request(ide_drive_t *drive, int uptodate) 228{ 229 struct request *rq = HWGROUP(drive)->rq; 230 int nsectors = rq->hard_cur_sectors; 231 232 if (blk_sense_request(rq) && uptodate) { 233 /* 234 * For REQ_TYPE_SENSE, "rq->buffer" points to the original 235 * failed request 236 */ 237 struct request *failed = (struct request *) rq->buffer; 238 struct cdrom_info *info = drive->driver_data; 239 void *sense = &info->sense_data; 240 unsigned long flags; 241 242 if (failed) { 243 if (failed->sense) { 244 sense = failed->sense; 245 failed->sense_len = rq->sense_len; 246 } 247 cdrom_analyze_sense_data(drive, failed, sense); 248 /* 249 * now end the failed request 250 */ 251 if (blk_fs_request(failed)) { 252 if (ide_end_dequeued_request(drive, failed, 0, 253 failed->hard_nr_sectors)) 254 BUG(); 255 } else { 256 spin_lock_irqsave(&ide_lock, flags); 257 if (__blk_end_request(failed, -EIO, 258 failed->data_len)) 259 BUG(); 260 spin_unlock_irqrestore(&ide_lock, flags); 261 } 262 } else 263 cdrom_analyze_sense_data(drive, NULL, sense); 264 } 265 266 if (!rq->current_nr_sectors && blk_fs_request(rq)) 267 uptodate = 1; 268 /* make sure it's fully ended */ 269 if (blk_pc_request(rq)) 270 nsectors = (rq->data_len + 511) >> 9; 271 if (!nsectors) 272 nsectors = 1; 273 274 ide_end_request(drive, uptodate, nsectors); 275} 276 277static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 st) 278{ 279 if (st & 0x80) 280 return; 281 ide_dump_status(drive, msg, st); 282} 283 284/* 285 * Returns: 286 * 0: if the request should be continued. 287 * 1: if the request was ended. 288 */ 289static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret) 290{ 291 struct request *rq = HWGROUP(drive)->rq; 292 int stat, err, sense_key; 293 294 /* check for errors */ 295 stat = ide_read_status(drive); 296 297 if (stat_ret) 298 *stat_ret = stat; 299 300 if (OK_STAT(stat, good_stat, BAD_R_STAT)) 301 return 0; 302 303 /* get the IDE error register */ 304 err = ide_read_error(drive); 305 sense_key = err >> 4; 306 307 if (rq == NULL) { 308 printk(KERN_ERR "%s: missing rq in %s\n", 309 drive->name, __func__); 310 return 1; 311 } 312 313 if (blk_sense_request(rq)) { 314 /* 315 * We got an error trying to get sense info from the drive 316 * (probably while trying to recover from a former error). 317 * Just give up. 318 */ 319 rq->cmd_flags |= REQ_FAILED; 320 cdrom_end_request(drive, 0); 321 ide_error(drive, "request sense failure", stat); 322 return 1; 323 324 } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) { 325 /* All other functions, except for READ. */ 326 327 /* 328 * if we have an error, pass back CHECK_CONDITION as the 329 * scsi status byte 330 */ 331 if (blk_pc_request(rq) && !rq->errors) 332 rq->errors = SAM_STAT_CHECK_CONDITION; 333 334 /* check for tray open */ 335 if (sense_key == NOT_READY) { 336 cdrom_saw_media_change(drive); 337 } else if (sense_key == UNIT_ATTENTION) { 338 /* check for media change */ 339 cdrom_saw_media_change(drive); 340 return 0; 341 } else if (sense_key == ILLEGAL_REQUEST && 342 rq->cmd[0] == GPCMD_START_STOP_UNIT) { 343 /* 344 * Don't print error message for this condition-- 345 * SFF8090i indicates that 5/24/00 is the correct 346 * response to a request to close the tray if the 347 * drive doesn't have that capability. 348 * cdrom_log_sense() knows this! 349 */ 350 } else if (!(rq->cmd_flags & REQ_QUIET)) { 351 /* otherwise, print an error */ 352 ide_dump_status(drive, "packet command error", stat); 353 } 354 355 rq->cmd_flags |= REQ_FAILED; 356 357 /* 358 * instead of playing games with moving completions around, 359 * remove failed request completely and end it when the 360 * request sense has completed 361 */ 362 goto end_request; 363 364 } else if (blk_fs_request(rq)) { 365 int do_end_request = 0; 366 367 /* handle errors from READ and WRITE requests */ 368 369 if (blk_noretry_request(rq)) 370 do_end_request = 1; 371 372 if (sense_key == NOT_READY) { 373 /* tray open */ 374 if (rq_data_dir(rq) == READ) { 375 cdrom_saw_media_change(drive); 376 377 /* fail the request */ 378 printk(KERN_ERR "%s: tray open\n", drive->name); 379 do_end_request = 1; 380 } else { 381 struct cdrom_info *info = drive->driver_data; 382 383 /* 384 * Allow the drive 5 seconds to recover, some 385 * devices will return this error while flushing 386 * data from cache. 387 */ 388 if (!rq->errors) 389 info->write_timeout = jiffies + 390 ATAPI_WAIT_WRITE_BUSY; 391 rq->errors = 1; 392 if (time_after(jiffies, info->write_timeout)) 393 do_end_request = 1; 394 else { 395 unsigned long flags; 396 397 /* 398 * take a breather relying on the unplug 399 * timer to kick us again 400 */ 401 spin_lock_irqsave(&ide_lock, flags); 402 blk_plug_device(drive->queue); 403 spin_unlock_irqrestore(&ide_lock, 404 flags); 405 return 1; 406 } 407 } 408 } else if (sense_key == UNIT_ATTENTION) { 409 /* media change */ 410 cdrom_saw_media_change(drive); 411 412 /* 413 * Arrange to retry the request but be sure to give up 414 * if we've retried too many times. 415 */ 416 if (++rq->errors > ERROR_MAX) 417 do_end_request = 1; 418 } else if (sense_key == ILLEGAL_REQUEST || 419 sense_key == DATA_PROTECT) { 420 /* 421 * No point in retrying after an illegal request or data 422 * protect error. 423 */ 424 ide_dump_status_no_sense(drive, "command error", stat); 425 do_end_request = 1; 426 } else if (sense_key == MEDIUM_ERROR) { 427 /* 428 * No point in re-trying a zillion times on a bad 429 * sector. If we got here the error is not correctable. 430 */ 431 ide_dump_status_no_sense(drive, 432 "media error (bad sector)", 433 stat); 434 do_end_request = 1; 435 } else if (sense_key == BLANK_CHECK) { 436 /* disk appears blank ?? */ 437 ide_dump_status_no_sense(drive, "media error (blank)", 438 stat); 439 do_end_request = 1; 440 } else if ((err & ~ABRT_ERR) != 0) { 441 /* go to the default handler for other errors */ 442 ide_error(drive, "cdrom_decode_status", stat); 443 return 1; 444 } else if ((++rq->errors > ERROR_MAX)) { 445 /* we've racked up too many retries, abort */ 446 do_end_request = 1; 447 } 448 449 /* 450 * End a request through request sense analysis when we have 451 * sense data. We need this in order to perform end of media 452 * processing. 453 */ 454 if (do_end_request) 455 goto end_request; 456 457 /* 458 * If we got a CHECK_CONDITION status, queue 459 * a request sense command. 460 */ 461 if (stat & ERR_STAT) 462 cdrom_queue_request_sense(drive, NULL, NULL); 463 } else { 464 blk_dump_rq_flags(rq, "ide-cd: bad rq"); 465 cdrom_end_request(drive, 0); 466 } 467 468 /* retry, or handle the next request */ 469 return 1; 470 471end_request: 472 if (stat & ERR_STAT) { 473 unsigned long flags; 474 475 spin_lock_irqsave(&ide_lock, flags); 476 blkdev_dequeue_request(rq); 477 HWGROUP(drive)->rq = NULL; 478 spin_unlock_irqrestore(&ide_lock, flags); 479 480 cdrom_queue_request_sense(drive, rq->sense, rq); 481 } else 482 cdrom_end_request(drive, 0); 483 484 return 1; 485} 486 487static int cdrom_timer_expiry(ide_drive_t *drive) 488{ 489 struct request *rq = HWGROUP(drive)->rq; 490 unsigned long wait = 0; 491 492 /* 493 * Some commands are *slow* and normally take a long time to complete. 494 * Usually we can use the ATAPI "disconnect" to bypass this, but not all 495 * commands/drives support that. Let ide_timer_expiry keep polling us 496 * for these. 497 */ 498 switch (rq->cmd[0]) { 499 case GPCMD_BLANK: 500 case GPCMD_FORMAT_UNIT: 501 case GPCMD_RESERVE_RZONE_TRACK: 502 case GPCMD_CLOSE_TRACK: 503 case GPCMD_FLUSH_CACHE: 504 wait = ATAPI_WAIT_PC; 505 break; 506 default: 507 if (!(rq->cmd_flags & REQ_QUIET)) 508 printk(KERN_INFO "ide-cd: cmd 0x%x timed out\n", 509 rq->cmd[0]); 510 wait = 0; 511 break; 512 } 513 return wait; 514} 515 516/* 517 * Set up the device registers for transferring a packet command on DEV, 518 * expecting to later transfer XFERLEN bytes. HANDLER is the routine 519 * which actually transfers the command to the drive. If this is a 520 * drq_interrupt device, this routine will arrange for HANDLER to be 521 * called when the interrupt from the drive arrives. Otherwise, HANDLER 522 * will be called immediately after the drive is prepared for the transfer. 523 */ 524static ide_startstop_t cdrom_start_packet_command(ide_drive_t *drive, 525 int xferlen, 526 ide_handler_t *handler) 527{ 528 ide_startstop_t startstop; 529 struct cdrom_info *info = drive->driver_data; 530 ide_hwif_t *hwif = drive->hwif; 531 532 /* wait for the controller to be idle */ 533 if (ide_wait_stat(&startstop, drive, 0, BUSY_STAT, WAIT_READY)) 534 return startstop; 535 536 /* FIXME: for Virtual DMA we must check harder */ 537 if (info->dma) 538 info->dma = !hwif->dma_ops->dma_setup(drive); 539 540 /* set up the controller registers */ 541 ide_pktcmd_tf_load(drive, IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL | 542 IDE_TFLAG_NO_SELECT_MASK, xferlen, info->dma); 543 544 if (info->cd_flags & IDE_CD_FLAG_DRQ_INTERRUPT) { 545 /* waiting for CDB interrupt, not DMA yet. */ 546 if (info->dma) 547 drive->waiting_for_dma = 0; 548 549 /* packet command */ 550 ide_execute_command(drive, WIN_PACKETCMD, handler, 551 ATAPI_WAIT_PC, cdrom_timer_expiry); 552 return ide_started; 553 } else { 554 ide_execute_pkt_cmd(drive); 555 556 return (*handler) (drive); 557 } 558} 559 560/* 561 * Send a packet command to DRIVE described by CMD_BUF and CMD_LEN. The device 562 * registers must have already been prepared by cdrom_start_packet_command. 563 * HANDLER is the interrupt handler to call when the command completes or 564 * there's data ready. 565 */ 566#define ATAPI_MIN_CDB_BYTES 12 567static ide_startstop_t cdrom_transfer_packet_command(ide_drive_t *drive, 568 struct request *rq, 569 ide_handler_t *handler) 570{ 571 ide_hwif_t *hwif = drive->hwif; 572 int cmd_len; 573 struct cdrom_info *info = drive->driver_data; 574 ide_startstop_t startstop; 575 576 if (info->cd_flags & IDE_CD_FLAG_DRQ_INTERRUPT) { 577 /* 578 * Here we should have been called after receiving an interrupt 579 * from the device. DRQ should how be set. 580 */ 581 582 /* check for errors */ 583 if (cdrom_decode_status(drive, DRQ_STAT, NULL)) 584 return ide_stopped; 585 586 /* ok, next interrupt will be DMA interrupt */ 587 if (info->dma) 588 drive->waiting_for_dma = 1; 589 } else { 590 /* otherwise, we must wait for DRQ to get set */ 591 if (ide_wait_stat(&startstop, drive, DRQ_STAT, 592 BUSY_STAT, WAIT_READY)) 593 return startstop; 594 } 595 596 /* arm the interrupt handler */ 597 ide_set_handler(drive, handler, rq->timeout, cdrom_timer_expiry); 598 599 /* ATAPI commands get padded out to 12 bytes minimum */ 600 cmd_len = COMMAND_SIZE(rq->cmd[0]); 601 if (cmd_len < ATAPI_MIN_CDB_BYTES) 602 cmd_len = ATAPI_MIN_CDB_BYTES; 603 604 /* send the command to the device */ 605 hwif->output_data(drive, NULL, rq->cmd, cmd_len); 606 607 /* start the DMA if need be */ 608 if (info->dma) 609 hwif->dma_ops->dma_start(drive); 610 611 return ide_started; 612} 613 614/* 615 * Block read functions. 616 */ 617static void ide_cd_pad_transfer(ide_drive_t *drive, xfer_func_t *xf, int len) 618{ 619 while (len > 0) { 620 int dum = 0; 621 xf(drive, NULL, &dum, sizeof(dum)); 622 len -= sizeof(dum); 623 } 624} 625 626static void ide_cd_drain_data(ide_drive_t *drive, int nsects) 627{ 628 while (nsects > 0) { 629 static char dum[SECTOR_SIZE]; 630 631 drive->hwif->input_data(drive, NULL, dum, sizeof(dum)); 632 nsects--; 633 } 634} 635 636/* 637 * Check the contents of the interrupt reason register from the cdrom 638 * and attempt to recover if there are problems. Returns 0 if everything's 639 * ok; nonzero if the request has been terminated. 640 */ 641static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq, 642 int len, int ireason, int rw) 643{ 644 /* 645 * ireason == 0: the drive wants to receive data from us 646 * ireason == 2: the drive is expecting to transfer data to us 647 */ 648 if (ireason == (!rw << 1)) 649 return 0; 650 else if (ireason == (rw << 1)) { 651 ide_hwif_t *hwif = drive->hwif; 652 xfer_func_t *xf; 653 654 /* whoops... */ 655 printk(KERN_ERR "%s: %s: wrong transfer direction!\n", 656 drive->name, __func__); 657 658 xf = rw ? hwif->output_data : hwif->input_data; 659 ide_cd_pad_transfer(drive, xf, len); 660 } else if (rw == 0 && ireason == 1) { 661 /* 662 * Some drives (ASUS) seem to tell us that status info is 663 * available. Just get it and ignore. 664 */ 665 (void)ide_read_status(drive); 666 return 0; 667 } else { 668 /* drive wants a command packet, or invalid ireason... */ 669 printk(KERN_ERR "%s: %s: bad interrupt reason 0x%02x\n", 670 drive->name, __func__, ireason); 671 } 672 673 if (rq->cmd_type == REQ_TYPE_ATA_PC) 674 rq->cmd_flags |= REQ_FAILED; 675 676 cdrom_end_request(drive, 0); 677 return -1; 678} 679 680/* 681 * Assume that the drive will always provide data in multiples of at least 682 * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise. 683 */ 684static int ide_cd_check_transfer_size(ide_drive_t *drive, int len) 685{ 686 struct cdrom_info *cd = drive->driver_data; 687 688 if ((len % SECTOR_SIZE) == 0) 689 return 0; 690 691 printk(KERN_ERR "%s: %s: Bad transfer size %d\n", 692 drive->name, __func__, len); 693 694 if (cd->cd_flags & IDE_CD_FLAG_LIMIT_NFRAMES) 695 printk(KERN_ERR " This drive is not supported by " 696 "this version of the driver\n"); 697 else { 698 printk(KERN_ERR " Trying to limit transfer sizes\n"); 699 cd->cd_flags |= IDE_CD_FLAG_LIMIT_NFRAMES; 700 } 701 702 return 1; 703} 704 705static ide_startstop_t cdrom_newpc_intr(ide_drive_t *); 706 707/* 708 * Routine to send a read/write packet command to the drive. This is usually 709 * called directly from cdrom_start_{read,write}(). However, for drq_interrupt 710 * devices, it is called from an interrupt when the drive is ready to accept 711 * the command. 712 */ 713static ide_startstop_t cdrom_start_rw_cont(ide_drive_t *drive) 714{ 715 struct request *rq = HWGROUP(drive)->rq; 716 717 if (rq_data_dir(rq) == READ) { 718 unsigned short sectors_per_frame = 719 queue_hardsect_size(drive->queue) >> SECTOR_BITS; 720 int nskip = rq->sector & (sectors_per_frame - 1); 721 722 /* 723 * If the requested sector doesn't start on a frame boundary, 724 * we must adjust the start of the transfer so that it does, 725 * and remember to skip the first few sectors. 726 * 727 * If the rq->current_nr_sectors field is larger than the size 728 * of the buffer, it will mean that we're to skip a number of 729 * sectors equal to the amount by which rq->current_nr_sectors 730 * is larger than the buffer size. 731 */ 732 if (nskip > 0) { 733 /* sanity check... */ 734 if (rq->current_nr_sectors != 735 bio_cur_sectors(rq->bio)) { 736 printk(KERN_ERR "%s: %s: buffer botch (%u)\n", 737 drive->name, __func__, 738 rq->current_nr_sectors); 739 cdrom_end_request(drive, 0); 740 return ide_stopped; 741 } 742 rq->current_nr_sectors += nskip; 743 } 744 } 745#if 0 746 else 747 /* the immediate bit */ 748 rq->cmd[1] = 1 << 3; 749#endif 750 /* set up the command */ 751 rq->timeout = ATAPI_WAIT_PC; 752 753 /* send the command to the drive and return */ 754 return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr); 755} 756 757#define IDECD_SEEK_THRESHOLD (1000) /* 1000 blocks */ 758#define IDECD_SEEK_TIMER (5 * WAIT_MIN_SLEEP) /* 100 ms */ 759#define IDECD_SEEK_TIMEOUT (2 * WAIT_CMD) /* 20 sec */ 760 761static ide_startstop_t cdrom_seek_intr(ide_drive_t *drive) 762{ 763 struct cdrom_info *info = drive->driver_data; 764 int stat; 765 static int retry = 10; 766 767 if (cdrom_decode_status(drive, 0, &stat)) 768 return ide_stopped; 769 770 info->cd_flags |= IDE_CD_FLAG_SEEKING; 771 772 if (retry && time_after(jiffies, info->start_seek + IDECD_SEEK_TIMER)) { 773 if (--retry == 0) 774 drive->dsc_overlap = 0; 775 } 776 return ide_stopped; 777} 778 779static ide_startstop_t cdrom_start_seek_continuation(ide_drive_t *drive) 780{ 781 struct request *rq = HWGROUP(drive)->rq; 782 sector_t frame = rq->sector; 783 784 sector_div(frame, queue_hardsect_size(drive->queue) >> SECTOR_BITS); 785 786 memset(rq->cmd, 0, BLK_MAX_CDB); 787 rq->cmd[0] = GPCMD_SEEK; 788 put_unaligned(cpu_to_be32(frame), (unsigned int *) &rq->cmd[2]); 789 790 rq->timeout = ATAPI_WAIT_PC; 791 return cdrom_transfer_packet_command(drive, rq, &cdrom_seek_intr); 792} 793 794static ide_startstop_t cdrom_start_seek(ide_drive_t *drive, unsigned int block) 795{ 796 struct cdrom_info *info = drive->driver_data; 797 798 info->dma = 0; 799 info->start_seek = jiffies; 800 return cdrom_start_packet_command(drive, 0, 801 cdrom_start_seek_continuation); 802} 803 804/* 805 * Fix up a possibly partially-processed request so that we can start it over 806 * entirely, or even put it back on the request queue. 807 */ 808static void restore_request(struct request *rq) 809{ 810 if (rq->buffer != bio_data(rq->bio)) { 811 sector_t n = 812 (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE; 813 814 rq->buffer = bio_data(rq->bio); 815 rq->nr_sectors += n; 816 rq->sector -= n; 817 } 818 rq->current_nr_sectors = bio_cur_sectors(rq->bio); 819 rq->hard_cur_sectors = rq->current_nr_sectors; 820 rq->hard_nr_sectors = rq->nr_sectors; 821 rq->hard_sector = rq->sector; 822 rq->q->prep_rq_fn(rq->q, rq); 823} 824 825/* 826 * All other packet commands. 827 */ 828static void ide_cd_request_sense_fixup(struct request *rq) 829{ 830 /* 831 * Some of the trailing request sense fields are optional, 832 * and some drives don't send them. Sigh. 833 */ 834 if (rq->cmd[0] == GPCMD_REQUEST_SENSE && 835 rq->data_len > 0 && rq->data_len <= 5) 836 while (rq->data_len > 0) { 837 *(u8 *)rq->data++ = 0; 838 --rq->data_len; 839 } 840} 841 842int ide_cd_queue_pc(ide_drive_t *drive, struct request *rq) 843{ 844 struct request_sense sense; 845 int retries = 10; 846 unsigned int flags = rq->cmd_flags; 847 848 if (rq->sense == NULL) 849 rq->sense = &sense; 850 851 /* start of retry loop */ 852 do { 853 int error; 854 unsigned long time = jiffies; 855 rq->cmd_flags = flags; 856 857 error = ide_do_drive_cmd(drive, rq, ide_wait); 858 time = jiffies - time; 859 860 /* 861 * FIXME: we should probably abort/retry or something in case of 862 * failure. 863 */ 864 if (rq->cmd_flags & REQ_FAILED) { 865 /* 866 * The request failed. Retry if it was due to a unit 867 * attention status (usually means media was changed). 868 */ 869 struct request_sense *reqbuf = rq->sense; 870 871 if (reqbuf->sense_key == UNIT_ATTENTION) 872 cdrom_saw_media_change(drive); 873 else if (reqbuf->sense_key == NOT_READY && 874 reqbuf->asc == 4 && reqbuf->ascq != 4) { 875 /* 876 * The drive is in the process of loading 877 * a disk. Retry, but wait a little to give 878 * the drive time to complete the load. 879 */ 880 ssleep(2); 881 } else { 882 /* otherwise, don't retry */ 883 retries = 0; 884 } 885 --retries; 886 } 887 888 /* end of retry loop */ 889 } while ((rq->cmd_flags & REQ_FAILED) && retries >= 0); 890 891 /* return an error if the command failed */ 892 return (rq->cmd_flags & REQ_FAILED) ? -EIO : 0; 893} 894 895/* 896 * Called from blk_end_request_callback() after the data of the request is 897 * completed and before the request itself is completed. By returning value '1', 898 * blk_end_request_callback() returns immediately without completing it. 899 */ 900static int cdrom_newpc_intr_dummy_cb(struct request *rq) 901{ 902 return 1; 903} 904 905static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive) 906{ 907 ide_hwif_t *hwif = drive->hwif; 908 struct cdrom_info *info = drive->driver_data; 909 struct request *rq = HWGROUP(drive)->rq; 910 xfer_func_t *xferfunc; 911 ide_expiry_t *expiry = NULL; 912 int dma_error = 0, dma, stat, ireason, len, thislen, uptodate = 0; 913 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0; 914 unsigned int timeout; 915 u8 lowcyl, highcyl; 916 917 /* check for errors */ 918 dma = info->dma; 919 if (dma) { 920 info->dma = 0; 921 dma_error = hwif->dma_ops->dma_end(drive); 922 if (dma_error) { 923 printk(KERN_ERR "%s: DMA %s error\n", drive->name, 924 write ? "write" : "read"); 925 ide_dma_off(drive); 926 } 927 } 928 929 if (cdrom_decode_status(drive, 0, &stat)) 930 return ide_stopped; 931 932 /* using dma, transfer is complete now */ 933 if (dma) { 934 if (dma_error) 935 return ide_error(drive, "dma error", stat); 936 if (blk_fs_request(rq)) { 937 ide_end_request(drive, 1, rq->nr_sectors); 938 return ide_stopped; 939 } 940 goto end_request; 941 } 942 943 /* ok we fall to pio :/ */ 944 ireason = hwif->INB(hwif->io_ports.nsect_addr) & 0x3; 945 lowcyl = hwif->INB(hwif->io_ports.lbam_addr); 946 highcyl = hwif->INB(hwif->io_ports.lbah_addr); 947 948 len = lowcyl + (256 * highcyl); 949 950 thislen = blk_fs_request(rq) ? len : rq->data_len; 951 if (thislen > len) 952 thislen = len; 953 954 /* If DRQ is clear, the command has completed. */ 955 if ((stat & DRQ_STAT) == 0) { 956 if (blk_fs_request(rq)) { 957 /* 958 * If we're not done reading/writing, complain. 959 * Otherwise, complete the command normally. 960 */ 961 uptodate = 1; 962 if (rq->current_nr_sectors > 0) { 963 printk(KERN_ERR "%s: %s: data underrun " 964 "(%d blocks)\n", 965 drive->name, __func__, 966 rq->current_nr_sectors); 967 if (!write) 968 rq->cmd_flags |= REQ_FAILED; 969 uptodate = 0; 970 } 971 cdrom_end_request(drive, uptodate); 972 return ide_stopped; 973 } else if (!blk_pc_request(rq)) { 974 ide_cd_request_sense_fixup(rq); 975 /* complain if we still have data left to transfer */ 976 uptodate = rq->data_len ? 0 : 1; 977 } 978 goto end_request; 979 } 980 981 /* check which way to transfer data */ 982 if (ide_cd_check_ireason(drive, rq, len, ireason, write)) 983 return ide_stopped; 984 985 if (blk_fs_request(rq)) { 986 if (write == 0) { 987 int nskip; 988 989 if (ide_cd_check_transfer_size(drive, len)) { 990 cdrom_end_request(drive, 0); 991 return ide_stopped; 992 } 993 994 /* 995 * First, figure out if we need to bit-bucket 996 * any of the leading sectors. 997 */ 998 nskip = min_t(int, rq->current_nr_sectors 999 - bio_cur_sectors(rq->bio), 1000 thislen >> 9); 1001 if (nskip > 0) { 1002 ide_cd_drain_data(drive, nskip); 1003 rq->current_nr_sectors -= nskip; 1004 thislen -= (nskip << 9); 1005 } 1006 } 1007 } 1008 1009 if (ireason == 0) { 1010 write = 1; 1011 xferfunc = hwif->output_data; 1012 } else { 1013 write = 0; 1014 xferfunc = hwif->input_data; 1015 } 1016 1017 /* transfer data */ 1018 while (thislen > 0) { 1019 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data; 1020 int blen = rq->data_len; 1021 1022 /* bio backed? */ 1023 if (rq->bio) { 1024 if (blk_fs_request(rq)) { 1025 ptr = rq->buffer; 1026 blen = rq->current_nr_sectors << 9; 1027 } else { 1028 ptr = bio_data(rq->bio); 1029 blen = bio_iovec(rq->bio)->bv_len; 1030 } 1031 } 1032 1033 if (!ptr) { 1034 if (blk_fs_request(rq) && !write) 1035 /* 1036 * If the buffers are full, pipe the rest into 1037 * oblivion. 1038 */ 1039 ide_cd_drain_data(drive, thislen >> 9); 1040 else { 1041 printk(KERN_ERR "%s: confused, missing data\n", 1042 drive->name); 1043 blk_dump_rq_flags(rq, rq_data_dir(rq) 1044 ? "cdrom_newpc_intr, write" 1045 : "cdrom_newpc_intr, read"); 1046 } 1047 break; 1048 } 1049 1050 if (blen > thislen) 1051 blen = thislen; 1052 1053 xferfunc(drive, NULL, ptr, blen); 1054 1055 thislen -= blen; 1056 len -= blen; 1057 1058 if (blk_fs_request(rq)) { 1059 rq->buffer += blen; 1060 rq->nr_sectors -= (blen >> 9); 1061 rq->current_nr_sectors -= (blen >> 9); 1062 rq->sector += (blen >> 9); 1063 1064 if (rq->current_nr_sectors == 0 && rq->nr_sectors) 1065 cdrom_end_request(drive, 1); 1066 } else { 1067 rq->data_len -= blen; 1068 1069 /* 1070 * The request can't be completed until DRQ is cleared. 1071 * So complete the data, but don't complete the request 1072 * using the dummy function for the callback feature 1073 * of blk_end_request_callback(). 1074 */ 1075 if (rq->bio) 1076 blk_end_request_callback(rq, 0, blen, 1077 cdrom_newpc_intr_dummy_cb); 1078 else 1079 rq->data += blen; 1080 } 1081 if (!write && blk_sense_request(rq)) 1082 rq->sense_len += blen; 1083 } 1084 1085 /* pad, if necessary */ 1086 if (!blk_fs_request(rq) && len > 0) 1087 ide_cd_pad_transfer(drive, xferfunc, len); 1088 1089 if (blk_pc_request(rq)) { 1090 timeout = rq->timeout; 1091 } else { 1092 timeout = ATAPI_WAIT_PC; 1093 if (!blk_fs_request(rq)) 1094 expiry = cdrom_timer_expiry; 1095 } 1096 1097 ide_set_handler(drive, cdrom_newpc_intr, timeout, expiry); 1098 return ide_started; 1099 1100end_request: 1101 if (blk_pc_request(rq)) { 1102 unsigned long flags; 1103 unsigned int dlen = rq->data_len; 1104 1105 if (dma) 1106 rq->data_len = 0; 1107 1108 spin_lock_irqsave(&ide_lock, flags); 1109 if (__blk_end_request(rq, 0, dlen)) 1110 BUG(); 1111 HWGROUP(drive)->rq = NULL; 1112 spin_unlock_irqrestore(&ide_lock, flags); 1113 } else { 1114 if (!uptodate) 1115 rq->cmd_flags |= REQ_FAILED; 1116 cdrom_end_request(drive, uptodate); 1117 } 1118 return ide_stopped; 1119} 1120 1121static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq) 1122{ 1123 struct cdrom_info *cd = drive->driver_data; 1124 int write = rq_data_dir(rq) == WRITE; 1125 unsigned short sectors_per_frame = 1126 queue_hardsect_size(drive->queue) >> SECTOR_BITS; 1127 1128 if (write) { 1129 /* disk has become write protected */ 1130 if (cd->disk->policy) { 1131 cdrom_end_request(drive, 0); 1132 return ide_stopped; 1133 } 1134 } else { 1135 /* 1136 * We may be retrying this request after an error. Fix up any 1137 * weirdness which might be present in the request packet. 1138 */ 1139 restore_request(rq); 1140 } 1141 1142 /* use DMA, if possible / writes *must* be hardware frame aligned */ 1143 if ((rq->nr_sectors & (sectors_per_frame - 1)) || 1144 (rq->sector & (sectors_per_frame - 1))) { 1145 if (write) { 1146 cdrom_end_request(drive, 0); 1147 return ide_stopped; 1148 } 1149 cd->dma = 0; 1150 } else 1151 cd->dma = drive->using_dma; 1152 1153 if (write) 1154 cd->devinfo.media_written = 1; 1155 1156 /* start sending the read/write request to the drive */ 1157 return cdrom_start_packet_command(drive, 32768, cdrom_start_rw_cont); 1158} 1159 1160static ide_startstop_t cdrom_do_newpc_cont(ide_drive_t *drive) 1161{ 1162 struct request *rq = HWGROUP(drive)->rq; 1163 1164 if (!rq->timeout) 1165 rq->timeout = ATAPI_WAIT_PC; 1166 1167 return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr); 1168} 1169 1170static ide_startstop_t cdrom_do_block_pc(ide_drive_t *drive, struct request *rq) 1171{ 1172 struct cdrom_info *info = drive->driver_data; 1173 1174 if (blk_pc_request(rq)) 1175 rq->cmd_flags |= REQ_QUIET; 1176 else 1177 rq->cmd_flags &= ~REQ_FAILED; 1178 1179 info->dma = 0; 1180 1181 /* sg request */ 1182 if (rq->bio) { 1183 int mask = drive->queue->dma_alignment; 1184 unsigned long addr = 1185 (unsigned long)page_address(bio_page(rq->bio)); 1186 1187 info->dma = drive->using_dma; 1188 1189 /* 1190 * check if dma is safe 1191 * 1192 * NOTE! The "len" and "addr" checks should possibly have 1193 * separate masks. 1194 */ 1195 if ((rq->data_len & 15) || (addr & mask)) 1196 info->dma = 0; 1197 } 1198 1199 /* start sending the command to the drive */ 1200 return cdrom_start_packet_command(drive, rq->data_len, 1201 cdrom_do_newpc_cont); 1202} 1203 1204/* 1205 * cdrom driver request routine. 1206 */ 1207static ide_startstop_t ide_do_rw_cdrom(ide_drive_t *drive, struct request *rq, 1208 sector_t block) 1209{ 1210 ide_startstop_t action; 1211 struct cdrom_info *info = drive->driver_data; 1212 1213 if (blk_fs_request(rq)) { 1214 if (info->cd_flags & IDE_CD_FLAG_SEEKING) { 1215 unsigned long elapsed = jiffies - info->start_seek; 1216 int stat = ide_read_status(drive); 1217 1218 if ((stat & SEEK_STAT) != SEEK_STAT) { 1219 if (elapsed < IDECD_SEEK_TIMEOUT) { 1220 ide_stall_queue(drive, 1221 IDECD_SEEK_TIMER); 1222 return ide_stopped; 1223 } 1224 printk(KERN_ERR "%s: DSC timeout\n", 1225 drive->name); 1226 } 1227 info->cd_flags &= ~IDE_CD_FLAG_SEEKING; 1228 } 1229 if (rq_data_dir(rq) == READ && 1230 IDE_LARGE_SEEK(info->last_block, block, 1231 IDECD_SEEK_THRESHOLD) && 1232 drive->dsc_overlap) 1233 action = cdrom_start_seek(drive, block); 1234 else 1235 action = cdrom_start_rw(drive, rq); 1236 info->last_block = block; 1237 return action; 1238 } else if (blk_sense_request(rq) || blk_pc_request(rq) || 1239 rq->cmd_type == REQ_TYPE_ATA_PC) { 1240 return cdrom_do_block_pc(drive, rq); 1241 } else if (blk_special_request(rq)) { 1242 /* right now this can only be a reset... */ 1243 cdrom_end_request(drive, 1); 1244 return ide_stopped; 1245 } 1246 1247 blk_dump_rq_flags(rq, "ide-cd bad flags"); 1248 cdrom_end_request(drive, 0); 1249 return ide_stopped; 1250} 1251 1252 1253 1254/* 1255 * Ioctl handling. 1256 * 1257 * Routines which queue packet commands take as a final argument a pointer to a 1258 * request_sense struct. If execution of the command results in an error with a 1259 * CHECK CONDITION status, this structure will be filled with the results of the 1260 * subsequent request sense command. The pointer can also be NULL, in which case 1261 * no sense information is returned. 1262 */ 1263static void msf_from_bcd(struct atapi_msf *msf) 1264{ 1265 msf->minute = BCD2BIN(msf->minute); 1266 msf->second = BCD2BIN(msf->second); 1267 msf->frame = BCD2BIN(msf->frame); 1268} 1269 1270int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense) 1271{ 1272 struct request req; 1273 struct cdrom_info *info = drive->driver_data; 1274 struct cdrom_device_info *cdi = &info->devinfo; 1275 1276 ide_cd_init_rq(drive, &req); 1277 1278 req.sense = sense; 1279 req.cmd[0] = GPCMD_TEST_UNIT_READY; 1280 req.cmd_flags |= REQ_QUIET; 1281 1282 /* 1283 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs 1284 * instead of supporting the LOAD_UNLOAD opcode. 1285 */ 1286 req.cmd[7] = cdi->sanyo_slot % 3; 1287 1288 return ide_cd_queue_pc(drive, &req); 1289} 1290 1291static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity, 1292 unsigned long *sectors_per_frame, 1293 struct request_sense *sense) 1294{ 1295 struct { 1296 __u32 lba; 1297 __u32 blocklen; 1298 } capbuf; 1299 1300 int stat; 1301 struct request req; 1302 1303 ide_cd_init_rq(drive, &req); 1304 1305 req.sense = sense; 1306 req.cmd[0] = GPCMD_READ_CDVD_CAPACITY; 1307 req.data = (char *)&capbuf; 1308 req.data_len = sizeof(capbuf); 1309 req.cmd_flags |= REQ_QUIET; 1310 1311 stat = ide_cd_queue_pc(drive, &req); 1312 if (stat == 0) { 1313 *capacity = 1 + be32_to_cpu(capbuf.lba); 1314 *sectors_per_frame = 1315 be32_to_cpu(capbuf.blocklen) >> SECTOR_BITS; 1316 } 1317 1318 return stat; 1319} 1320 1321static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag, 1322 int format, char *buf, int buflen, 1323 struct request_sense *sense) 1324{ 1325 struct request req; 1326 1327 ide_cd_init_rq(drive, &req); 1328 1329 req.sense = sense; 1330 req.data = buf; 1331 req.data_len = buflen; 1332 req.cmd_flags |= REQ_QUIET; 1333 req.cmd[0] = GPCMD_READ_TOC_PMA_ATIP; 1334 req.cmd[6] = trackno; 1335 req.cmd[7] = (buflen >> 8); 1336 req.cmd[8] = (buflen & 0xff); 1337 req.cmd[9] = (format << 6); 1338 1339 if (msf_flag) 1340 req.cmd[1] = 2; 1341 1342 return ide_cd_queue_pc(drive, &req); 1343} 1344 1345/* Try to read the entire TOC for the disk into our internal buffer. */ 1346int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense) 1347{ 1348 int stat, ntracks, i; 1349 struct cdrom_info *info = drive->driver_data; 1350 struct cdrom_device_info *cdi = &info->devinfo; 1351 struct atapi_toc *toc = info->toc; 1352 struct { 1353 struct atapi_toc_header hdr; 1354 struct atapi_toc_entry ent; 1355 } ms_tmp; 1356 long last_written; 1357 unsigned long sectors_per_frame = SECTORS_PER_FRAME; 1358 1359 if (toc == NULL) { 1360 /* try to allocate space */ 1361 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL); 1362 if (toc == NULL) { 1363 printk(KERN_ERR "%s: No cdrom TOC buffer!\n", 1364 drive->name); 1365 return -ENOMEM; 1366 } 1367 info->toc = toc; 1368 } 1369 1370 /* 1371 * Check to see if the existing data is still valid. If it is, 1372 * just return. 1373 */ 1374 (void) cdrom_check_status(drive, sense); 1375 1376 if (info->cd_flags & IDE_CD_FLAG_TOC_VALID) 1377 return 0; 1378 1379 /* try to get the total cdrom capacity and sector size */ 1380 stat = cdrom_read_capacity(drive, &toc->capacity, §ors_per_frame, 1381 sense); 1382 if (stat) 1383 toc->capacity = 0x1fffff; 1384 1385 set_capacity(info->disk, toc->capacity * sectors_per_frame); 1386 /* save a private copy of the TOC capacity for error handling */ 1387 drive->probed_capacity = toc->capacity * sectors_per_frame; 1388 1389 blk_queue_hardsect_size(drive->queue, 1390 sectors_per_frame << SECTOR_BITS); 1391 1392 /* first read just the header, so we know how long the TOC is */ 1393 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr, 1394 sizeof(struct atapi_toc_header), sense); 1395 if (stat) 1396 return stat; 1397 1398 if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) { 1399 toc->hdr.first_track = BCD2BIN(toc->hdr.first_track); 1400 toc->hdr.last_track = BCD2BIN(toc->hdr.last_track); 1401 } 1402 1403 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1; 1404 if (ntracks <= 0) 1405 return -EIO; 1406 if (ntracks > MAX_TRACKS) 1407 ntracks = MAX_TRACKS; 1408 1409 /* now read the whole schmeer */ 1410 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0, 1411 (char *)&toc->hdr, 1412 sizeof(struct atapi_toc_header) + 1413 (ntracks + 1) * 1414 sizeof(struct atapi_toc_entry), sense); 1415 1416 if (stat && toc->hdr.first_track > 1) { 1417 /* 1418 * Cds with CDI tracks only don't have any TOC entries, despite 1419 * of this the returned values are 1420 * first_track == last_track = number of CDI tracks + 1, 1421 * so that this case is indistinguishable from the same layout 1422 * plus an additional audio track. If we get an error for the 1423 * regular case, we assume a CDI without additional audio 1424 * tracks. In this case the readable TOC is empty (CDI tracks 1425 * are not included) and only holds the Leadout entry. 1426 * 1427 * Heiko Eißfeldt. 1428 */ 1429 ntracks = 0; 1430 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0, 1431 (char *)&toc->hdr, 1432 sizeof(struct atapi_toc_header) + 1433 (ntracks + 1) * 1434 sizeof(struct atapi_toc_entry), 1435 sense); 1436 if (stat) 1437 return stat; 1438 1439 if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) { 1440 toc->hdr.first_track = (u8)BIN2BCD(CDROM_LEADOUT); 1441 toc->hdr.last_track = (u8)BIN2BCD(CDROM_LEADOUT); 1442 } else { 1443 toc->hdr.first_track = CDROM_LEADOUT; 1444 toc->hdr.last_track = CDROM_LEADOUT; 1445 } 1446 } 1447 1448 if (stat) 1449 return stat; 1450 1451 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length); 1452 1453 if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) { 1454 toc->hdr.first_track = BCD2BIN(toc->hdr.first_track); 1455 toc->hdr.last_track = BCD2BIN(toc->hdr.last_track); 1456 } 1457 1458 for (i = 0; i <= ntracks; i++) { 1459 if (info->cd_flags & IDE_CD_FLAG_TOCADDR_AS_BCD) { 1460 if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) 1461 toc->ent[i].track = BCD2BIN(toc->ent[i].track); 1462 msf_from_bcd(&toc->ent[i].addr.msf); 1463 } 1464 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute, 1465 toc->ent[i].addr.msf.second, 1466 toc->ent[i].addr.msf.frame); 1467 } 1468 1469 if (toc->hdr.first_track != CDROM_LEADOUT) { 1470 /* read the multisession information */ 1471 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp, 1472 sizeof(ms_tmp), sense); 1473 if (stat) 1474 return stat; 1475 1476 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba); 1477 } else { 1478 ms_tmp.hdr.last_track = CDROM_LEADOUT; 1479 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track; 1480 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */ 1481 } 1482 1483 if (info->cd_flags & IDE_CD_FLAG_TOCADDR_AS_BCD) { 1484 /* re-read multisession information using MSF format */ 1485 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp, 1486 sizeof(ms_tmp), sense); 1487 if (stat) 1488 return stat; 1489 1490 msf_from_bcd(&ms_tmp.ent.addr.msf); 1491 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute, 1492 ms_tmp.ent.addr.msf.second, 1493 ms_tmp.ent.addr.msf.frame); 1494 } 1495 1496 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track); 1497 1498 /* now try to get the total cdrom capacity */ 1499 stat = cdrom_get_last_written(cdi, &last_written); 1500 if (!stat && (last_written > toc->capacity)) { 1501 toc->capacity = last_written; 1502 set_capacity(info->disk, toc->capacity * sectors_per_frame); 1503 drive->probed_capacity = toc->capacity * sectors_per_frame; 1504 } 1505 1506 /* Remember that we've read this stuff. */ 1507 info->cd_flags |= IDE_CD_FLAG_TOC_VALID; 1508 1509 return 0; 1510} 1511 1512int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf) 1513{ 1514 struct cdrom_info *info = drive->driver_data; 1515 struct cdrom_device_info *cdi = &info->devinfo; 1516 struct packet_command cgc; 1517 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE; 1518 1519 if ((info->cd_flags & IDE_CD_FLAG_FULL_CAPS_PAGE) == 0) 1520 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE; 1521 1522 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN); 1523 do { 1524 /* we seem to get stat=0x01,err=0x00 the first time (??) */ 1525 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0); 1526 if (!stat) 1527 break; 1528 } while (--attempts); 1529 return stat; 1530} 1531 1532void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf) 1533{ 1534 struct cdrom_info *cd = drive->driver_data; 1535 u16 curspeed, maxspeed; 1536 1537 curspeed = *(u16 *)&buf[8 + 14]; 1538 maxspeed = *(u16 *)&buf[8 + 8]; 1539 1540 if (cd->cd_flags & IDE_CD_FLAG_LE_SPEED_FIELDS) { 1541 curspeed = le16_to_cpu(curspeed); 1542 maxspeed = le16_to_cpu(maxspeed); 1543 } else { 1544 curspeed = be16_to_cpu(curspeed); 1545 maxspeed = be16_to_cpu(maxspeed); 1546 } 1547 1548 cd->current_speed = (curspeed + (176/2)) / 176; 1549 cd->max_speed = (maxspeed + (176/2)) / 176; 1550} 1551 1552#define IDE_CD_CAPABILITIES \ 1553 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \ 1554 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \ 1555 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \ 1556 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \ 1557 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM) 1558 1559static struct cdrom_device_ops ide_cdrom_dops = { 1560 .open = ide_cdrom_open_real, 1561 .release = ide_cdrom_release_real, 1562 .drive_status = ide_cdrom_drive_status, 1563 .media_changed = ide_cdrom_check_media_change_real, 1564 .tray_move = ide_cdrom_tray_move, 1565 .lock_door = ide_cdrom_lock_door, 1566 .select_speed = ide_cdrom_select_speed, 1567 .get_last_session = ide_cdrom_get_last_session, 1568 .get_mcn = ide_cdrom_get_mcn, 1569 .reset = ide_cdrom_reset, 1570 .audio_ioctl = ide_cdrom_audio_ioctl, 1571 .capability = IDE_CD_CAPABILITIES, 1572 .generic_packet = ide_cdrom_packet, 1573}; 1574 1575static int ide_cdrom_register(ide_drive_t *drive, int nslots) 1576{ 1577 struct cdrom_info *info = drive->driver_data; 1578 struct cdrom_device_info *devinfo = &info->devinfo; 1579 1580 devinfo->ops = &ide_cdrom_dops; 1581 devinfo->speed = info->current_speed; 1582 devinfo->capacity = nslots; 1583 devinfo->handle = drive; 1584 strcpy(devinfo->name, drive->name); 1585 1586 if (info->cd_flags & IDE_CD_FLAG_NO_SPEED_SELECT) 1587 devinfo->mask |= CDC_SELECT_SPEED; 1588 1589 devinfo->disk = info->disk; 1590 return register_cdrom(devinfo); 1591} 1592 1593static int ide_cdrom_probe_capabilities(ide_drive_t *drive) 1594{ 1595 struct cdrom_info *cd = drive->driver_data; 1596 struct cdrom_device_info *cdi = &cd->devinfo; 1597 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE]; 1598 mechtype_t mechtype; 1599 int nslots = 1; 1600 1601 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R | 1602 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO | 1603 CDC_MO_DRIVE | CDC_RAM); 1604 1605 if (drive->media == ide_optical) { 1606 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM); 1607 printk(KERN_ERR "%s: ATAPI magneto-optical drive\n", 1608 drive->name); 1609 return nslots; 1610 } 1611 1612 if (cd->cd_flags & IDE_CD_FLAG_PRE_ATAPI12) { 1613 cd->cd_flags &= ~IDE_CD_FLAG_NO_EJECT; 1614 cdi->mask &= ~CDC_PLAY_AUDIO; 1615 return nslots; 1616 } 1617 1618 /* 1619 * We have to cheat a little here. the packet will eventually be queued 1620 * with ide_cdrom_packet(), which extracts the drive from cdi->handle. 1621 * Since this device hasn't been registered with the Uniform layer yet, 1622 * it can't do this. Same goes for cdi->ops. 1623 */ 1624 cdi->handle = drive; 1625 cdi->ops = &ide_cdrom_dops; 1626 1627 if (ide_cdrom_get_capabilities(drive, buf)) 1628 return 0; 1629 1630 if ((buf[8 + 6] & 0x01) == 0) 1631 cd->cd_flags |= IDE_CD_FLAG_NO_DOORLOCK; 1632 if (buf[8 + 6] & 0x08) 1633 cd->cd_flags &= ~IDE_CD_FLAG_NO_EJECT; 1634 if (buf[8 + 3] & 0x01) 1635 cdi->mask &= ~CDC_CD_R; 1636 if (buf[8 + 3] & 0x02) 1637 cdi->mask &= ~(CDC_CD_RW | CDC_RAM); 1638 if (buf[8 + 2] & 0x38) 1639 cdi->mask &= ~CDC_DVD; 1640 if (buf[8 + 3] & 0x20) 1641 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM); 1642 if (buf[8 + 3] & 0x10) 1643 cdi->mask &= ~CDC_DVD_R; 1644 if ((buf[8 + 4] & 0x01) || (cd->cd_flags & IDE_CD_FLAG_PLAY_AUDIO_OK)) 1645 cdi->mask &= ~CDC_PLAY_AUDIO; 1646 1647 mechtype = buf[8 + 6] >> 5; 1648 if (mechtype == mechtype_caddy || mechtype == mechtype_popup) 1649 cdi->mask |= CDC_CLOSE_TRAY; 1650 1651 if (cdi->sanyo_slot > 0) { 1652 cdi->mask &= ~CDC_SELECT_DISC; 1653 nslots = 3; 1654 } else if (mechtype == mechtype_individual_changer || 1655 mechtype == mechtype_cartridge_changer) { 1656 nslots = cdrom_number_of_slots(cdi); 1657 if (nslots > 1) 1658 cdi->mask &= ~CDC_SELECT_DISC; 1659 } 1660 1661 ide_cdrom_update_speed(drive, buf); 1662 1663 printk(KERN_INFO "%s: ATAPI", drive->name); 1664 1665 /* don't print speed if the drive reported 0 */ 1666 if (cd->max_speed) 1667 printk(KERN_CONT " %dX", cd->max_speed); 1668 1669 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM"); 1670 1671 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0) 1672 printk(KERN_CONT " DVD%s%s", 1673 (cdi->mask & CDC_DVD_R) ? "" : "-R", 1674 (cdi->mask & CDC_DVD_RAM) ? "" : "-RAM"); 1675 1676 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0) 1677 printk(KERN_CONT " CD%s%s", 1678 (cdi->mask & CDC_CD_R) ? "" : "-R", 1679 (cdi->mask & CDC_CD_RW) ? "" : "/RW"); 1680 1681 if ((cdi->mask & CDC_SELECT_DISC) == 0) 1682 printk(KERN_CONT " changer w/%d slots", nslots); 1683 else 1684 printk(KERN_CONT " drive"); 1685 1686 printk(KERN_CONT ", %dkB Cache\n", be16_to_cpu(*(u16 *)&buf[8 + 12])); 1687 1688 return nslots; 1689} 1690 1691/* standard prep_rq_fn that builds 10 byte cmds */ 1692static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq) 1693{ 1694 int hard_sect = queue_hardsect_size(q); 1695 long block = (long)rq->hard_sector / (hard_sect >> 9); 1696 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9); 1697 1698 memset(rq->cmd, 0, BLK_MAX_CDB); 1699 1700 if (rq_data_dir(rq) == READ) 1701 rq->cmd[0] = GPCMD_READ_10; 1702 else 1703 rq->cmd[0] = GPCMD_WRITE_10; 1704 1705 /* 1706 * fill in lba 1707 */ 1708 rq->cmd[2] = (block >> 24) & 0xff; 1709 rq->cmd[3] = (block >> 16) & 0xff; 1710 rq->cmd[4] = (block >> 8) & 0xff; 1711 rq->cmd[5] = block & 0xff; 1712 1713 /* 1714 * and transfer length 1715 */ 1716 rq->cmd[7] = (blocks >> 8) & 0xff; 1717 rq->cmd[8] = blocks & 0xff; 1718 rq->cmd_len = 10; 1719 return BLKPREP_OK; 1720} 1721 1722/* 1723 * Most of the SCSI commands are supported directly by ATAPI devices. 1724 * This transform handles the few exceptions. 1725 */ 1726static int ide_cdrom_prep_pc(struct request *rq) 1727{ 1728 u8 *c = rq->cmd; 1729 1730 /* transform 6-byte read/write commands to the 10-byte version */ 1731 if (c[0] == READ_6 || c[0] == WRITE_6) { 1732 c[8] = c[4]; 1733 c[5] = c[3]; 1734 c[4] = c[2]; 1735 c[3] = c[1] & 0x1f; 1736 c[2] = 0; 1737 c[1] &= 0xe0; 1738 c[0] += (READ_10 - READ_6); 1739 rq->cmd_len = 10; 1740 return BLKPREP_OK; 1741 } 1742 1743 /* 1744 * it's silly to pretend we understand 6-byte sense commands, just 1745 * reject with ILLEGAL_REQUEST and the caller should take the 1746 * appropriate action 1747 */ 1748 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) { 1749 rq->errors = ILLEGAL_REQUEST; 1750 return BLKPREP_KILL; 1751 } 1752 1753 return BLKPREP_OK; 1754} 1755 1756static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq) 1757{ 1758 if (blk_fs_request(rq)) 1759 return ide_cdrom_prep_fs(q, rq); 1760 else if (blk_pc_request(rq)) 1761 return ide_cdrom_prep_pc(rq); 1762 1763 return 0; 1764} 1765 1766struct cd_list_entry { 1767 const char *id_model; 1768 const char *id_firmware; 1769 unsigned int cd_flags; 1770}; 1771 1772#ifdef CONFIG_IDE_PROC_FS 1773static sector_t ide_cdrom_capacity(ide_drive_t *drive) 1774{ 1775 unsigned long capacity, sectors_per_frame; 1776 1777 if (cdrom_read_capacity(drive, &capacity, §ors_per_frame, NULL)) 1778 return 0; 1779 1780 return capacity * sectors_per_frame; 1781} 1782 1783static int proc_idecd_read_capacity(char *page, char **start, off_t off, 1784 int count, int *eof, void *data) 1785{ 1786 ide_drive_t *drive = data; 1787 int len; 1788 1789 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive)); 1790 PROC_IDE_READ_RETURN(page, start, off, count, eof, len); 1791} 1792 1793static ide_proc_entry_t idecd_proc[] = { 1794 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL }, 1795 { NULL, 0, NULL, NULL } 1796}; 1797 1798static void ide_cdrom_add_settings(ide_drive_t *drive) 1799{ 1800 ide_add_setting(drive, "dsc_overlap", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1, 1801 &drive->dsc_overlap, NULL); 1802} 1803#else 1804static inline void ide_cdrom_add_settings(ide_drive_t *drive) { ; } 1805#endif 1806 1807static const struct cd_list_entry ide_cd_quirks_list[] = { 1808 /* Limit transfer size per interrupt. */ 1809 { "SAMSUNG CD-ROM SCR-2430", NULL, IDE_CD_FLAG_LIMIT_NFRAMES }, 1810 { "SAMSUNG CD-ROM SCR-2432", NULL, IDE_CD_FLAG_LIMIT_NFRAMES }, 1811 /* SCR-3231 doesn't support the SET_CD_SPEED command. */ 1812 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_CD_FLAG_NO_SPEED_SELECT }, 1813 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */ 1814 { "NEC CD-ROM DRIVE:260", "1.01", IDE_CD_FLAG_TOCADDR_AS_BCD | 1815 IDE_CD_FLAG_PRE_ATAPI12, }, 1816 /* Vertos 300, some versions of this drive like to talk BCD. */ 1817 { "V003S0DS", NULL, IDE_CD_FLAG_VERTOS_300_SSD, }, 1818 /* Vertos 600 ESD. */ 1819 { "V006E0DS", NULL, IDE_CD_FLAG_VERTOS_600_ESD, }, 1820 /* 1821 * Sanyo 3 CD changer uses a non-standard command for CD changing 1822 * (by default standard ATAPI support for CD changers is used). 1823 */ 1824 { "CD-ROM CDR-C3 G", NULL, IDE_CD_FLAG_SANYO_3CD }, 1825 { "CD-ROM CDR-C3G", NULL, IDE_CD_FLAG_SANYO_3CD }, 1826 { "CD-ROM CDR_C36", NULL, IDE_CD_FLAG_SANYO_3CD }, 1827 /* Stingray 8X CD-ROM. */ 1828 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_CD_FLAG_PRE_ATAPI12}, 1829 /* 1830 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length 1831 * mode sense page capabilities size, but older drives break. 1832 */ 1833 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_CD_FLAG_FULL_CAPS_PAGE }, 1834 { "WPI CDS-32X", NULL, IDE_CD_FLAG_FULL_CAPS_PAGE }, 1835 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */ 1836 { "", "241N", IDE_CD_FLAG_LE_SPEED_FIELDS }, 1837 /* 1838 * Some drives used by Apple don't advertise audio play 1839 * but they do support reading TOC & audio datas. 1840 */ 1841 { "MATSHITADVD-ROM SR-8187", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK }, 1842 { "MATSHITADVD-ROM SR-8186", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK }, 1843 { "MATSHITADVD-ROM SR-8176", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK }, 1844 { "MATSHITADVD-ROM SR-8174", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK }, 1845 { "Optiarc DVD RW AD-5200A", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK }, 1846 { NULL, NULL, 0 } 1847}; 1848 1849static unsigned int ide_cd_flags(struct hd_driveid *id) 1850{ 1851 const struct cd_list_entry *cle = ide_cd_quirks_list; 1852 1853 while (cle->id_model) { 1854 if (strcmp(cle->id_model, id->model) == 0 && 1855 (cle->id_firmware == NULL || 1856 strstr(id->fw_rev, cle->id_firmware))) 1857 return cle->cd_flags; 1858 cle++; 1859 } 1860 1861 return 0; 1862} 1863 1864static int ide_cdrom_setup(ide_drive_t *drive) 1865{ 1866 struct cdrom_info *cd = drive->driver_data; 1867 struct cdrom_device_info *cdi = &cd->devinfo; 1868 struct hd_driveid *id = drive->id; 1869 int nslots; 1870 1871 blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn); 1872 blk_queue_dma_alignment(drive->queue, 31); 1873 drive->queue->unplug_delay = (1 * HZ) / 1000; 1874 if (!drive->queue->unplug_delay) 1875 drive->queue->unplug_delay = 1; 1876 1877 drive->special.all = 0; 1878 1879 cd->cd_flags = IDE_CD_FLAG_MEDIA_CHANGED | IDE_CD_FLAG_NO_EJECT | 1880 ide_cd_flags(id); 1881 1882 if ((id->config & 0x0060) == 0x20) 1883 cd->cd_flags |= IDE_CD_FLAG_DRQ_INTERRUPT; 1884 1885 if ((cd->cd_flags & IDE_CD_FLAG_VERTOS_300_SSD) && 1886 id->fw_rev[4] == '1' && id->fw_rev[6] <= '2') 1887 cd->cd_flags |= (IDE_CD_FLAG_TOCTRACKS_AS_BCD | 1888 IDE_CD_FLAG_TOCADDR_AS_BCD); 1889 else if ((cd->cd_flags & IDE_CD_FLAG_VERTOS_600_ESD) && 1890 id->fw_rev[4] == '1' && id->fw_rev[6] <= '2') 1891 cd->cd_flags |= IDE_CD_FLAG_TOCTRACKS_AS_BCD; 1892 else if (cd->cd_flags & IDE_CD_FLAG_SANYO_3CD) 1893 /* 3 => use CD in slot 0 */ 1894 cdi->sanyo_slot = 3; 1895 1896 nslots = ide_cdrom_probe_capabilities(drive); 1897 1898 /* set correct block size */ 1899 blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE); 1900 1901 drive->dsc_overlap = (drive->next != drive); 1902 1903 if (ide_cdrom_register(drive, nslots)) { 1904 printk(KERN_ERR "%s: %s failed to register device with the" 1905 " cdrom driver.\n", drive->name, __func__); 1906 cd->devinfo.handle = NULL; 1907 return 1; 1908 } 1909 ide_cdrom_add_settings(drive); 1910 return 0; 1911} 1912 1913static void ide_cd_remove(ide_drive_t *drive) 1914{ 1915 struct cdrom_info *info = drive->driver_data; 1916 1917 ide_proc_unregister_driver(drive, info->driver); 1918 1919 del_gendisk(info->disk); 1920 1921 ide_cd_put(info); 1922} 1923 1924static void ide_cd_release(struct kref *kref) 1925{ 1926 struct cdrom_info *info = to_ide_cd(kref); 1927 struct cdrom_device_info *devinfo = &info->devinfo; 1928 ide_drive_t *drive = info->drive; 1929 struct gendisk *g = info->disk; 1930 1931 kfree(info->toc); 1932 if (devinfo->handle == drive) 1933 unregister_cdrom(devinfo); 1934 drive->dsc_overlap = 0; 1935 drive->driver_data = NULL; 1936 blk_queue_prep_rq(drive->queue, NULL); 1937 g->private_data = NULL; 1938 put_disk(g); 1939 kfree(info); 1940} 1941 1942static int ide_cd_probe(ide_drive_t *); 1943 1944static ide_driver_t ide_cdrom_driver = { 1945 .gen_driver = { 1946 .owner = THIS_MODULE, 1947 .name = "ide-cdrom", 1948 .bus = &ide_bus_type, 1949 }, 1950 .probe = ide_cd_probe, 1951 .remove = ide_cd_remove, 1952 .version = IDECD_VERSION, 1953 .media = ide_cdrom, 1954 .supports_dsc_overlap = 1, 1955 .do_request = ide_do_rw_cdrom, 1956 .end_request = ide_end_request, 1957 .error = __ide_error, 1958 .abort = __ide_abort, 1959#ifdef CONFIG_IDE_PROC_FS 1960 .proc = idecd_proc, 1961#endif 1962}; 1963 1964static int idecd_open(struct inode *inode, struct file *file) 1965{ 1966 struct gendisk *disk = inode->i_bdev->bd_disk; 1967 struct cdrom_info *info; 1968 int rc = -ENOMEM; 1969 1970 info = ide_cd_get(disk); 1971 if (!info) 1972 return -ENXIO; 1973 1974 rc = cdrom_open(&info->devinfo, inode, file); 1975 1976 if (rc < 0) 1977 ide_cd_put(info); 1978 1979 return rc; 1980} 1981 1982static int idecd_release(struct inode *inode, struct file *file) 1983{ 1984 struct gendisk *disk = inode->i_bdev->bd_disk; 1985 struct cdrom_info *info = ide_cd_g(disk); 1986 1987 cdrom_release(&info->devinfo, file); 1988 1989 ide_cd_put(info); 1990 1991 return 0; 1992} 1993 1994static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg) 1995{ 1996 struct packet_command cgc; 1997 char buffer[16]; 1998 int stat; 1999 char spindown; 2000 2001 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char))) 2002 return -EFAULT; 2003 2004 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN); 2005 2006 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0); 2007 if (stat) 2008 return stat; 2009 2010 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f); 2011 return cdrom_mode_select(cdi, &cgc); 2012} 2013 2014static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg) 2015{ 2016 struct packet_command cgc; 2017 char buffer[16]; 2018 int stat; 2019 char spindown; 2020 2021 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN); 2022 2023 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0); 2024 if (stat) 2025 return stat; 2026 2027 spindown = buffer[11] & 0x0f; 2028 if (copy_to_user((void __user *)arg, &spindown, sizeof(char))) 2029 return -EFAULT; 2030 return 0; 2031} 2032 2033static int idecd_ioctl(struct inode *inode, struct file *file, 2034 unsigned int cmd, unsigned long arg) 2035{ 2036 struct block_device *bdev = inode->i_bdev; 2037 struct cdrom_info *info = ide_cd_g(bdev->bd_disk); 2038 int err; 2039 2040 switch (cmd) { 2041 case CDROMSETSPINDOWN: 2042 return idecd_set_spindown(&info->devinfo, arg); 2043 case CDROMGETSPINDOWN: 2044 return idecd_get_spindown(&info->devinfo, arg); 2045 default: 2046 break; 2047 } 2048 2049 err = generic_ide_ioctl(info->drive, file, bdev, cmd, arg); 2050 if (err == -EINVAL) 2051 err = cdrom_ioctl(file, &info->devinfo, inode, cmd, arg); 2052 2053 return err; 2054} 2055 2056static int idecd_media_changed(struct gendisk *disk) 2057{ 2058 struct cdrom_info *info = ide_cd_g(disk); 2059 return cdrom_media_changed(&info->devinfo); 2060} 2061 2062static int idecd_revalidate_disk(struct gendisk *disk) 2063{ 2064 struct cdrom_info *info = ide_cd_g(disk); 2065 struct request_sense sense; 2066 2067 ide_cd_read_toc(info->drive, &sense); 2068 2069 return 0; 2070} 2071 2072static struct block_device_operations idecd_ops = { 2073 .owner = THIS_MODULE, 2074 .open = idecd_open, 2075 .release = idecd_release, 2076 .ioctl = idecd_ioctl, 2077 .media_changed = idecd_media_changed, 2078 .revalidate_disk = idecd_revalidate_disk 2079}; 2080 2081/* module options */ 2082static char *ignore; 2083 2084module_param(ignore, charp, 0400); 2085MODULE_DESCRIPTION("ATAPI CD-ROM Driver"); 2086 2087static int ide_cd_probe(ide_drive_t *drive) 2088{ 2089 struct cdrom_info *info; 2090 struct gendisk *g; 2091 struct request_sense sense; 2092 2093 if (!strstr("ide-cdrom", drive->driver_req)) 2094 goto failed; 2095 if (!drive->present) 2096 goto failed; 2097 if (drive->media != ide_cdrom && drive->media != ide_optical) 2098 goto failed; 2099 /* skip drives that we were told to ignore */ 2100 if (ignore != NULL) { 2101 if (strstr(ignore, drive->name)) { 2102 printk(KERN_INFO "ide-cd: ignoring drive %s\n", 2103 drive->name); 2104 goto failed; 2105 } 2106 } 2107 if (drive->scsi) { 2108 printk(KERN_INFO "ide-cd: passing drive %s to ide-scsi " 2109 "emulation.\n", drive->name); 2110 goto failed; 2111 } 2112 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL); 2113 if (info == NULL) { 2114 printk(KERN_ERR "%s: Can't allocate a cdrom structure\n", 2115 drive->name); 2116 goto failed; 2117 } 2118 2119 g = alloc_disk(1 << PARTN_BITS); 2120 if (!g) 2121 goto out_free_cd; 2122 2123 ide_init_disk(g, drive); 2124 2125 ide_proc_register_driver(drive, &ide_cdrom_driver); 2126 2127 kref_init(&info->kref); 2128 2129 info->drive = drive; 2130 info->driver = &ide_cdrom_driver; 2131 info->disk = g; 2132 2133 g->private_data = &info->driver; 2134 2135 drive->driver_data = info; 2136 2137 g->minors = 1; 2138 g->driverfs_dev = &drive->gendev; 2139 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE; 2140 if (ide_cdrom_setup(drive)) { 2141 ide_proc_unregister_driver(drive, &ide_cdrom_driver); 2142 ide_cd_release(&info->kref); 2143 goto failed; 2144 } 2145 2146 ide_cd_read_toc(drive, &sense); 2147 g->fops = &idecd_ops; 2148 g->flags |= GENHD_FL_REMOVABLE; 2149 add_disk(g); 2150 return 0; 2151 2152out_free_cd: 2153 kfree(info); 2154failed: 2155 return -ENODEV; 2156} 2157 2158static void __exit ide_cdrom_exit(void) 2159{ 2160 driver_unregister(&ide_cdrom_driver.gen_driver); 2161} 2162 2163static int __init ide_cdrom_init(void) 2164{ 2165 return driver_register(&ide_cdrom_driver.gen_driver); 2166} 2167 2168MODULE_ALIAS("ide:*m-cdrom*"); 2169MODULE_ALIAS("ide-cd"); 2170module_init(ide_cdrom_init); 2171module_exit(ide_cdrom_exit); 2172MODULE_LICENSE("GPL"); 2173