ide-cd.c revision 2c7eaa43c3bb7b3b9fe2051d17f308c1f0728c78
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, 2007-2009 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 * 16 * Documentation: 17 * Mt. Fuji (SFF8090 version 4) and ATAPI (SFF-8020i rev 2.6) standards. 18 * 19 * For historical changelog please see: 20 * Documentation/ide/ChangeLog.ide-cd.1994-2004 21 */ 22 23#define DRV_NAME "ide-cd" 24#define PFX DRV_NAME ": " 25 26#define IDECD_VERSION "5.00" 27 28#include <linux/module.h> 29#include <linux/types.h> 30#include <linux/kernel.h> 31#include <linux/delay.h> 32#include <linux/timer.h> 33#include <linux/slab.h> 34#include <linux/interrupt.h> 35#include <linux/errno.h> 36#include <linux/cdrom.h> 37#include <linux/ide.h> 38#include <linux/completion.h> 39#include <linux/mutex.h> 40#include <linux/bcd.h> 41 42/* For SCSI -> ATAPI command conversion */ 43#include <scsi/scsi.h> 44 45#include <linux/irq.h> 46#include <linux/io.h> 47#include <asm/byteorder.h> 48#include <linux/uaccess.h> 49#include <asm/unaligned.h> 50 51#include "ide-cd.h" 52 53static DEFINE_MUTEX(idecd_ref_mutex); 54 55static void ide_cd_release(struct device *); 56 57static struct cdrom_info *ide_cd_get(struct gendisk *disk) 58{ 59 struct cdrom_info *cd = NULL; 60 61 mutex_lock(&idecd_ref_mutex); 62 cd = ide_drv_g(disk, cdrom_info); 63 if (cd) { 64 if (ide_device_get(cd->drive)) 65 cd = NULL; 66 else 67 get_device(&cd->dev); 68 69 } 70 mutex_unlock(&idecd_ref_mutex); 71 return cd; 72} 73 74static void ide_cd_put(struct cdrom_info *cd) 75{ 76 ide_drive_t *drive = cd->drive; 77 78 mutex_lock(&idecd_ref_mutex); 79 put_device(&cd->dev); 80 ide_device_put(drive); 81 mutex_unlock(&idecd_ref_mutex); 82} 83 84/* 85 * Generic packet command support and error handling routines. 86 */ 87 88/* Mark that we've seen a media change and invalidate our internal buffers. */ 89static void cdrom_saw_media_change(ide_drive_t *drive) 90{ 91 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED; 92 drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID; 93} 94 95static int cdrom_log_sense(ide_drive_t *drive, struct request *rq) 96{ 97 struct request_sense *sense = &drive->sense_data; 98 int log = 0; 99 100 if (!sense || !rq || (rq->cmd_flags & REQ_QUIET)) 101 return 0; 102 103 ide_debug_log(IDE_DBG_SENSE, "sense_key: 0x%x", sense->sense_key); 104 105 switch (sense->sense_key) { 106 case NO_SENSE: 107 case RECOVERED_ERROR: 108 break; 109 case NOT_READY: 110 /* 111 * don't care about tray state messages for e.g. capacity 112 * commands or in-progress or becoming ready 113 */ 114 if (sense->asc == 0x3a || sense->asc == 0x04) 115 break; 116 log = 1; 117 break; 118 case ILLEGAL_REQUEST: 119 /* 120 * don't log START_STOP unit with LoEj set, since we cannot 121 * reliably check if drive can auto-close 122 */ 123 if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24) 124 break; 125 log = 1; 126 break; 127 case UNIT_ATTENTION: 128 /* 129 * Make good and sure we've seen this potential media change. 130 * Some drives (i.e. Creative) fail to present the correct sense 131 * key in the error register. 132 */ 133 cdrom_saw_media_change(drive); 134 break; 135 default: 136 log = 1; 137 break; 138 } 139 return log; 140} 141 142static void cdrom_analyze_sense_data(ide_drive_t *drive, 143 struct request *failed_command) 144{ 145 struct request_sense *sense = &drive->sense_data; 146 struct cdrom_info *info = drive->driver_data; 147 unsigned long sector; 148 unsigned long bio_sectors; 149 150 ide_debug_log(IDE_DBG_SENSE, "error_code: 0x%x, sense_key: 0x%x", 151 sense->error_code, sense->sense_key); 152 153 if (failed_command) 154 ide_debug_log(IDE_DBG_SENSE, "failed cmd: 0x%x", 155 failed_command->cmd[0]); 156 157 if (!cdrom_log_sense(drive, failed_command)) 158 return; 159 160 /* 161 * If a read toc is executed for a CD-R or CD-RW medium where the first 162 * toc has not been recorded yet, it will fail with 05/24/00 (which is a 163 * confusing error) 164 */ 165 if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP) 166 if (sense->sense_key == 0x05 && sense->asc == 0x24) 167 return; 168 169 /* current error */ 170 if (sense->error_code == 0x70) { 171 switch (sense->sense_key) { 172 case MEDIUM_ERROR: 173 case VOLUME_OVERFLOW: 174 case ILLEGAL_REQUEST: 175 if (!sense->valid) 176 break; 177 if (failed_command == NULL || 178 !blk_fs_request(failed_command)) 179 break; 180 sector = (sense->information[0] << 24) | 181 (sense->information[1] << 16) | 182 (sense->information[2] << 8) | 183 (sense->information[3]); 184 185 if (queue_logical_block_size(drive->queue) == 2048) 186 /* device sector size is 2K */ 187 sector <<= 2; 188 189 bio_sectors = max(bio_sectors(failed_command->bio), 4U); 190 sector &= ~(bio_sectors - 1); 191 192 /* 193 * The SCSI specification allows for the value 194 * returned by READ CAPACITY to be up to 75 2K 195 * sectors past the last readable block. 196 * Therefore, if we hit a medium error within the 197 * last 75 2K sectors, we decrease the saved size 198 * value. 199 */ 200 if (sector < get_capacity(info->disk) && 201 drive->probed_capacity - sector < 4 * 75) 202 set_capacity(info->disk, sector); 203 } 204 } 205 206 ide_cd_log_error(drive->name, failed_command, sense); 207} 208 209static void ide_cd_complete_failed_rq(ide_drive_t *drive, struct request *rq) 210{ 211 /* 212 * For REQ_TYPE_SENSE, "rq->special" points to the original 213 * failed request. Also, the sense data should be read 214 * directly from rq which might be different from the original 215 * sense buffer if it got copied during mapping. 216 */ 217 struct request *failed = (struct request *)rq->special; 218 void *sense = bio_data(rq->bio); 219 220 if (failed) { 221 if (failed->sense) { 222 /* 223 * Sense is always read into drive->sense_data. 224 * Copy back if the failed request has its 225 * sense pointer set. 226 */ 227 memcpy(failed->sense, sense, 18); 228 failed->sense_len = rq->sense_len; 229 } 230 cdrom_analyze_sense_data(drive, failed); 231 232 if (ide_end_rq(drive, failed, -EIO, blk_rq_bytes(failed))) 233 BUG(); 234 } else 235 cdrom_analyze_sense_data(drive, NULL); 236} 237 238 239/* 240 * Allow the drive 5 seconds to recover; some devices will return NOT_READY 241 * while flushing data from cache. 242 * 243 * returns: 0 failed (write timeout expired) 244 * 1 success 245 */ 246static int ide_cd_breathe(ide_drive_t *drive, struct request *rq) 247{ 248 249 struct cdrom_info *info = drive->driver_data; 250 251 if (!rq->errors) 252 info->write_timeout = jiffies + ATAPI_WAIT_WRITE_BUSY; 253 254 rq->errors = 1; 255 256 if (time_after(jiffies, info->write_timeout)) 257 return 0; 258 else { 259 struct request_queue *q = drive->queue; 260 unsigned long flags; 261 262 /* 263 * take a breather relying on the unplug timer to kick us again 264 */ 265 266 spin_lock_irqsave(q->queue_lock, flags); 267 blk_plug_device(q); 268 spin_unlock_irqrestore(q->queue_lock, flags); 269 270 return 1; 271 } 272} 273 274/** 275 * Returns: 276 * 0: if the request should be continued. 277 * 1: if the request will be going through error recovery. 278 * 2: if the request should be ended. 279 */ 280static int cdrom_decode_status(ide_drive_t *drive, u8 stat) 281{ 282 ide_hwif_t *hwif = drive->hwif; 283 struct request *rq = hwif->rq; 284 int err, sense_key, do_end_request = 0; 285 286 /* get the IDE error register */ 287 err = ide_read_error(drive); 288 sense_key = err >> 4; 289 290 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, rq->cmd_type: 0x%x, err: 0x%x, " 291 "stat 0x%x", 292 rq->cmd[0], rq->cmd_type, err, stat); 293 294 if (blk_sense_request(rq)) { 295 /* 296 * We got an error trying to get sense info from the drive 297 * (probably while trying to recover from a former error). 298 * Just give up. 299 */ 300 rq->cmd_flags |= REQ_FAILED; 301 return 2; 302 } 303 304 /* if we have an error, pass CHECK_CONDITION as the SCSI status byte */ 305 if (blk_pc_request(rq) && !rq->errors) 306 rq->errors = SAM_STAT_CHECK_CONDITION; 307 308 if (blk_noretry_request(rq)) 309 do_end_request = 1; 310 311 switch (sense_key) { 312 case NOT_READY: 313 if (blk_fs_request(rq) && rq_data_dir(rq) == WRITE) { 314 if (ide_cd_breathe(drive, rq)) 315 return 1; 316 } else { 317 cdrom_saw_media_change(drive); 318 319 if (blk_fs_request(rq) && !blk_rq_quiet(rq)) 320 printk(KERN_ERR PFX "%s: tray open\n", 321 drive->name); 322 } 323 do_end_request = 1; 324 break; 325 case UNIT_ATTENTION: 326 cdrom_saw_media_change(drive); 327 328 if (blk_fs_request(rq) == 0) 329 return 0; 330 331 /* 332 * Arrange to retry the request but be sure to give up if we've 333 * retried too many times. 334 */ 335 if (++rq->errors > ERROR_MAX) 336 do_end_request = 1; 337 break; 338 case ILLEGAL_REQUEST: 339 /* 340 * Don't print error message for this condition -- SFF8090i 341 * indicates that 5/24/00 is the correct response to a request 342 * to close the tray if the drive doesn't have that capability. 343 * 344 * cdrom_log_sense() knows this! 345 */ 346 if (rq->cmd[0] == GPCMD_START_STOP_UNIT) 347 break; 348 /* fall-through */ 349 case DATA_PROTECT: 350 /* 351 * No point in retrying after an illegal request or data 352 * protect error. 353 */ 354 if (!blk_rq_quiet(rq)) 355 ide_dump_status(drive, "command error", stat); 356 do_end_request = 1; 357 break; 358 case MEDIUM_ERROR: 359 /* 360 * No point in re-trying a zillion times on a bad sector. 361 * If we got here the error is not correctable. 362 */ 363 if (!blk_rq_quiet(rq)) 364 ide_dump_status(drive, "media error " 365 "(bad sector)", stat); 366 do_end_request = 1; 367 break; 368 case BLANK_CHECK: 369 /* disk appears blank? */ 370 if (!blk_rq_quiet(rq)) 371 ide_dump_status(drive, "media error (blank)", 372 stat); 373 do_end_request = 1; 374 break; 375 default: 376 if (blk_fs_request(rq) == 0) 377 break; 378 if (err & ~ATA_ABORTED) { 379 /* go to the default handler for other errors */ 380 ide_error(drive, "cdrom_decode_status", stat); 381 return 1; 382 } else if (++rq->errors > ERROR_MAX) 383 /* we've racked up too many retries, abort */ 384 do_end_request = 1; 385 } 386 387 if (blk_fs_request(rq) == 0) { 388 rq->cmd_flags |= REQ_FAILED; 389 do_end_request = 1; 390 } 391 392 /* 393 * End a request through request sense analysis when we have sense data. 394 * We need this in order to perform end of media processing. 395 */ 396 if (do_end_request) 397 goto end_request; 398 399 /* if we got a CHECK_CONDITION status, queue a request sense command */ 400 if (stat & ATA_ERR) 401 return ide_queue_sense_rq(drive, NULL) ? 2 : 1; 402 return 1; 403 404end_request: 405 if (stat & ATA_ERR) { 406 hwif->rq = NULL; 407 return ide_queue_sense_rq(drive, rq) ? 2 : 1; 408 } else 409 return 2; 410} 411 412static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct ide_cmd *cmd) 413{ 414 struct request *rq = cmd->rq; 415 416 ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]); 417 418 /* 419 * Some of the trailing request sense fields are optional, 420 * and some drives don't send them. Sigh. 421 */ 422 if (rq->cmd[0] == GPCMD_REQUEST_SENSE && 423 cmd->nleft > 0 && cmd->nleft <= 5) 424 cmd->nleft = 0; 425} 426 427int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd, 428 int write, void *buffer, unsigned *bufflen, 429 struct request_sense *sense, int timeout, 430 unsigned int cmd_flags) 431{ 432 struct cdrom_info *info = drive->driver_data; 433 struct request_sense local_sense; 434 int retries = 10; 435 unsigned int flags = 0; 436 437 if (!sense) 438 sense = &local_sense; 439 440 ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, " 441 "cmd_flags: 0x%x", 442 cmd[0], write, timeout, cmd_flags); 443 444 /* start of retry loop */ 445 do { 446 struct request *rq; 447 int error; 448 449 rq = blk_get_request(drive->queue, write, __GFP_WAIT); 450 451 memcpy(rq->cmd, cmd, BLK_MAX_CDB); 452 rq->cmd_type = REQ_TYPE_ATA_PC; 453 rq->sense = sense; 454 rq->cmd_flags |= cmd_flags; 455 rq->timeout = timeout; 456 if (buffer) { 457 error = blk_rq_map_kern(drive->queue, rq, buffer, 458 *bufflen, GFP_NOIO); 459 if (error) { 460 blk_put_request(rq); 461 return error; 462 } 463 } 464 465 error = blk_execute_rq(drive->queue, info->disk, rq, 0); 466 467 if (buffer) 468 *bufflen = rq->resid_len; 469 470 flags = rq->cmd_flags; 471 blk_put_request(rq); 472 473 /* 474 * FIXME: we should probably abort/retry or something in case of 475 * failure. 476 */ 477 if (flags & REQ_FAILED) { 478 /* 479 * The request failed. Retry if it was due to a unit 480 * attention status (usually means media was changed). 481 */ 482 struct request_sense *reqbuf = sense; 483 484 if (reqbuf->sense_key == UNIT_ATTENTION) 485 cdrom_saw_media_change(drive); 486 else if (reqbuf->sense_key == NOT_READY && 487 reqbuf->asc == 4 && reqbuf->ascq != 4) { 488 /* 489 * The drive is in the process of loading 490 * a disk. Retry, but wait a little to give 491 * the drive time to complete the load. 492 */ 493 ssleep(2); 494 } else { 495 /* otherwise, don't retry */ 496 retries = 0; 497 } 498 --retries; 499 } 500 501 /* end of retry loop */ 502 } while ((flags & REQ_FAILED) && retries >= 0); 503 504 /* return an error if the command failed */ 505 return (flags & REQ_FAILED) ? -EIO : 0; 506} 507 508static void ide_cd_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd) 509{ 510 unsigned int nr_bytes = cmd->nbytes - cmd->nleft; 511 512 if (cmd->tf_flags & IDE_TFLAG_WRITE) 513 nr_bytes -= cmd->last_xfer_len; 514 515 if (nr_bytes > 0) 516 ide_complete_rq(drive, 0, nr_bytes); 517} 518 519static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive) 520{ 521 ide_hwif_t *hwif = drive->hwif; 522 struct ide_cmd *cmd = &hwif->cmd; 523 struct request *rq = hwif->rq; 524 ide_expiry_t *expiry = NULL; 525 int dma_error = 0, dma, thislen, uptodate = 0; 526 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc = 0; 527 int sense = blk_sense_request(rq); 528 unsigned int timeout; 529 u16 len; 530 u8 ireason, stat; 531 532 ide_debug_log(IDE_DBG_PC, "cmd: 0x%x, write: 0x%x", rq->cmd[0], write); 533 534 /* check for errors */ 535 dma = drive->dma; 536 if (dma) { 537 drive->dma = 0; 538 drive->waiting_for_dma = 0; 539 dma_error = hwif->dma_ops->dma_end(drive); 540 ide_dma_unmap_sg(drive, cmd); 541 if (dma_error) { 542 printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name, 543 write ? "write" : "read"); 544 ide_dma_off(drive); 545 } 546 } 547 548 /* check status */ 549 stat = hwif->tp_ops->read_status(hwif); 550 551 if (!OK_STAT(stat, 0, BAD_R_STAT)) { 552 rc = cdrom_decode_status(drive, stat); 553 if (rc) { 554 if (rc == 2) 555 goto out_end; 556 return ide_stopped; 557 } 558 } 559 560 /* using dma, transfer is complete now */ 561 if (dma) { 562 if (dma_error) 563 return ide_error(drive, "dma error", stat); 564 uptodate = 1; 565 goto out_end; 566 } 567 568 ide_read_bcount_and_ireason(drive, &len, &ireason); 569 570 thislen = blk_fs_request(rq) ? len : cmd->nleft; 571 if (thislen > len) 572 thislen = len; 573 574 ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d", 575 stat, thislen); 576 577 /* If DRQ is clear, the command has completed. */ 578 if ((stat & ATA_DRQ) == 0) { 579 if (blk_fs_request(rq)) { 580 /* 581 * If we're not done reading/writing, complain. 582 * Otherwise, complete the command normally. 583 */ 584 uptodate = 1; 585 if (cmd->nleft > 0) { 586 printk(KERN_ERR PFX "%s: %s: data underrun " 587 "(%u bytes)\n", drive->name, __func__, 588 cmd->nleft); 589 if (!write) 590 rq->cmd_flags |= REQ_FAILED; 591 uptodate = 0; 592 } 593 } else if (!blk_pc_request(rq)) { 594 ide_cd_request_sense_fixup(drive, cmd); 595 /* complain if we still have data left to transfer */ 596 uptodate = cmd->nleft ? 0 : 1; 597 if (uptodate == 0) 598 rq->cmd_flags |= REQ_FAILED; 599 } 600 goto out_end; 601 } 602 603 rc = ide_check_ireason(drive, rq, len, ireason, write); 604 if (rc) 605 goto out_end; 606 607 cmd->last_xfer_len = 0; 608 609 ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, " 610 "ireason: 0x%x", 611 rq->cmd_type, ireason); 612 613 /* transfer data */ 614 while (thislen > 0) { 615 int blen = min_t(int, thislen, cmd->nleft); 616 617 if (cmd->nleft == 0) 618 break; 619 620 ide_pio_bytes(drive, cmd, write, blen); 621 cmd->last_xfer_len += blen; 622 623 thislen -= blen; 624 len -= blen; 625 626 if (sense && write == 0) 627 rq->sense_len += blen; 628 } 629 630 /* pad, if necessary */ 631 if (len > 0) { 632 if (blk_fs_request(rq) == 0 || write == 0) 633 ide_pad_transfer(drive, write, len); 634 else { 635 printk(KERN_ERR PFX "%s: confused, missing data\n", 636 drive->name); 637 blk_dump_rq_flags(rq, "cdrom_newpc_intr"); 638 } 639 } 640 641 if (blk_pc_request(rq)) { 642 timeout = rq->timeout; 643 } else { 644 timeout = ATAPI_WAIT_PC; 645 if (!blk_fs_request(rq)) 646 expiry = ide_cd_expiry; 647 } 648 649 hwif->expiry = expiry; 650 ide_set_handler(drive, cdrom_newpc_intr, timeout); 651 return ide_started; 652 653out_end: 654 if (blk_pc_request(rq) && rc == 0) { 655 rq->resid_len = 0; 656 blk_end_request_all(rq, 0); 657 hwif->rq = NULL; 658 } else { 659 if (sense && uptodate) 660 ide_cd_complete_failed_rq(drive, rq); 661 662 if (blk_fs_request(rq)) { 663 if (cmd->nleft == 0) 664 uptodate = 1; 665 } else { 666 if (uptodate <= 0 && rq->errors == 0) 667 rq->errors = -EIO; 668 } 669 670 if (uptodate == 0) 671 ide_cd_error_cmd(drive, cmd); 672 673 /* make sure it's fully ended */ 674 if (blk_fs_request(rq) == 0) { 675 rq->resid_len -= cmd->nbytes - cmd->nleft; 676 if (uptodate == 0 && (cmd->tf_flags & IDE_TFLAG_WRITE)) 677 rq->resid_len += cmd->last_xfer_len; 678 } 679 680 ide_complete_rq(drive, uptodate ? 0 : -EIO, blk_rq_bytes(rq)); 681 682 if (sense && rc == 2) 683 ide_error(drive, "request sense failure", stat); 684 } 685 return ide_stopped; 686} 687 688static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq) 689{ 690 struct cdrom_info *cd = drive->driver_data; 691 struct request_queue *q = drive->queue; 692 int write = rq_data_dir(rq) == WRITE; 693 unsigned short sectors_per_frame = 694 queue_logical_block_size(q) >> SECTOR_BITS; 695 696 ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, rq->cmd_flags: 0x%x, " 697 "secs_per_frame: %u", 698 rq->cmd[0], rq->cmd_flags, sectors_per_frame); 699 700 if (write) { 701 /* disk has become write protected */ 702 if (get_disk_ro(cd->disk)) 703 return ide_stopped; 704 } else { 705 /* 706 * We may be retrying this request after an error. Fix up any 707 * weirdness which might be present in the request packet. 708 */ 709 q->prep_rq_fn(q, rq); 710 } 711 712 /* fs requests *must* be hardware frame aligned */ 713 if ((blk_rq_sectors(rq) & (sectors_per_frame - 1)) || 714 (blk_rq_pos(rq) & (sectors_per_frame - 1))) 715 return ide_stopped; 716 717 /* use DMA, if possible */ 718 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA); 719 720 if (write) 721 cd->devinfo.media_written = 1; 722 723 rq->timeout = ATAPI_WAIT_PC; 724 725 return ide_started; 726} 727 728static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq) 729{ 730 731 ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x", 732 rq->cmd[0], rq->cmd_type); 733 734 if (blk_pc_request(rq)) 735 rq->cmd_flags |= REQ_QUIET; 736 else 737 rq->cmd_flags &= ~REQ_FAILED; 738 739 drive->dma = 0; 740 741 /* sg request */ 742 if (rq->bio) { 743 struct request_queue *q = drive->queue; 744 char *buf = bio_data(rq->bio); 745 unsigned int alignment; 746 747 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA); 748 749 /* 750 * check if dma is safe 751 * 752 * NOTE! The "len" and "addr" checks should possibly have 753 * separate masks. 754 */ 755 alignment = queue_dma_alignment(q) | q->dma_pad_mask; 756 if ((unsigned long)buf & alignment 757 || blk_rq_bytes(rq) & q->dma_pad_mask 758 || object_is_on_stack(buf)) 759 drive->dma = 0; 760 } 761} 762 763static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq, 764 sector_t block) 765{ 766 struct ide_cmd cmd; 767 int uptodate = 0, nsectors; 768 769 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu", 770 rq->cmd[0], (unsigned long long)block); 771 772 if (drive->debug_mask & IDE_DBG_RQ) 773 blk_dump_rq_flags(rq, "ide_cd_do_request"); 774 775 if (blk_fs_request(rq)) { 776 if (cdrom_start_rw(drive, rq) == ide_stopped) 777 goto out_end; 778 } else if (blk_sense_request(rq) || blk_pc_request(rq) || 779 rq->cmd_type == REQ_TYPE_ATA_PC) { 780 if (!rq->timeout) 781 rq->timeout = ATAPI_WAIT_PC; 782 783 cdrom_do_block_pc(drive, rq); 784 } else if (blk_special_request(rq)) { 785 /* right now this can only be a reset... */ 786 uptodate = 1; 787 goto out_end; 788 } else 789 BUG(); 790 791 /* prepare sense request for this command */ 792 ide_prep_sense(drive, rq); 793 794 memset(&cmd, 0, sizeof(cmd)); 795 796 if (rq_data_dir(rq)) 797 cmd.tf_flags |= IDE_TFLAG_WRITE; 798 799 cmd.rq = rq; 800 801 if (blk_fs_request(rq) || blk_rq_bytes(rq)) { 802 ide_init_sg_cmd(&cmd, blk_rq_bytes(rq)); 803 ide_map_sg(drive, &cmd); 804 } 805 806 return ide_issue_pc(drive, &cmd); 807out_end: 808 nsectors = blk_rq_sectors(rq); 809 810 if (nsectors == 0) 811 nsectors = 1; 812 813 ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9); 814 815 return ide_stopped; 816} 817 818/* 819 * Ioctl handling. 820 * 821 * Routines which queue packet commands take as a final argument a pointer to a 822 * request_sense struct. If execution of the command results in an error with a 823 * CHECK CONDITION status, this structure will be filled with the results of the 824 * subsequent request sense command. The pointer can also be NULL, in which case 825 * no sense information is returned. 826 */ 827static void msf_from_bcd(struct atapi_msf *msf) 828{ 829 msf->minute = bcd2bin(msf->minute); 830 msf->second = bcd2bin(msf->second); 831 msf->frame = bcd2bin(msf->frame); 832} 833 834int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense) 835{ 836 struct cdrom_info *info = drive->driver_data; 837 struct cdrom_device_info *cdi = &info->devinfo; 838 unsigned char cmd[BLK_MAX_CDB]; 839 840 ide_debug_log(IDE_DBG_FUNC, "enter"); 841 842 memset(cmd, 0, BLK_MAX_CDB); 843 cmd[0] = GPCMD_TEST_UNIT_READY; 844 845 /* 846 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs 847 * instead of supporting the LOAD_UNLOAD opcode. 848 */ 849 cmd[7] = cdi->sanyo_slot % 3; 850 851 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET); 852} 853 854static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity, 855 unsigned long *sectors_per_frame, 856 struct request_sense *sense) 857{ 858 struct { 859 __be32 lba; 860 __be32 blocklen; 861 } capbuf; 862 863 int stat; 864 unsigned char cmd[BLK_MAX_CDB]; 865 unsigned len = sizeof(capbuf); 866 u32 blocklen; 867 868 ide_debug_log(IDE_DBG_FUNC, "enter"); 869 870 memset(cmd, 0, BLK_MAX_CDB); 871 cmd[0] = GPCMD_READ_CDVD_CAPACITY; 872 873 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0, 874 REQ_QUIET); 875 if (stat) 876 return stat; 877 878 /* 879 * Sanity check the given block size 880 */ 881 blocklen = be32_to_cpu(capbuf.blocklen); 882 switch (blocklen) { 883 case 512: 884 case 1024: 885 case 2048: 886 case 4096: 887 break; 888 default: 889 printk(KERN_ERR PFX "%s: weird block size %u\n", 890 drive->name, blocklen); 891 printk(KERN_ERR PFX "%s: default to 2kb block size\n", 892 drive->name); 893 blocklen = 2048; 894 break; 895 } 896 897 *capacity = 1 + be32_to_cpu(capbuf.lba); 898 *sectors_per_frame = blocklen >> SECTOR_BITS; 899 900 ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu", 901 *capacity, *sectors_per_frame); 902 903 return 0; 904} 905 906static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag, 907 int format, char *buf, int buflen, 908 struct request_sense *sense) 909{ 910 unsigned char cmd[BLK_MAX_CDB]; 911 912 ide_debug_log(IDE_DBG_FUNC, "enter"); 913 914 memset(cmd, 0, BLK_MAX_CDB); 915 916 cmd[0] = GPCMD_READ_TOC_PMA_ATIP; 917 cmd[6] = trackno; 918 cmd[7] = (buflen >> 8); 919 cmd[8] = (buflen & 0xff); 920 cmd[9] = (format << 6); 921 922 if (msf_flag) 923 cmd[1] = 2; 924 925 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET); 926} 927 928/* Try to read the entire TOC for the disk into our internal buffer. */ 929int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense) 930{ 931 int stat, ntracks, i; 932 struct cdrom_info *info = drive->driver_data; 933 struct cdrom_device_info *cdi = &info->devinfo; 934 struct atapi_toc *toc = info->toc; 935 struct { 936 struct atapi_toc_header hdr; 937 struct atapi_toc_entry ent; 938 } ms_tmp; 939 long last_written; 940 unsigned long sectors_per_frame = SECTORS_PER_FRAME; 941 942 ide_debug_log(IDE_DBG_FUNC, "enter"); 943 944 if (toc == NULL) { 945 /* try to allocate space */ 946 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL); 947 if (toc == NULL) { 948 printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n", 949 drive->name); 950 return -ENOMEM; 951 } 952 info->toc = toc; 953 } 954 955 /* 956 * Check to see if the existing data is still valid. If it is, 957 * just return. 958 */ 959 (void) cdrom_check_status(drive, sense); 960 961 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID) 962 return 0; 963 964 /* try to get the total cdrom capacity and sector size */ 965 stat = cdrom_read_capacity(drive, &toc->capacity, §ors_per_frame, 966 sense); 967 if (stat) 968 toc->capacity = 0x1fffff; 969 970 set_capacity(info->disk, toc->capacity * sectors_per_frame); 971 /* save a private copy of the TOC capacity for error handling */ 972 drive->probed_capacity = toc->capacity * sectors_per_frame; 973 974 blk_queue_logical_block_size(drive->queue, 975 sectors_per_frame << SECTOR_BITS); 976 977 /* first read just the header, so we know how long the TOC is */ 978 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr, 979 sizeof(struct atapi_toc_header), sense); 980 if (stat) 981 return stat; 982 983 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 984 toc->hdr.first_track = bcd2bin(toc->hdr.first_track); 985 toc->hdr.last_track = bcd2bin(toc->hdr.last_track); 986 } 987 988 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1; 989 if (ntracks <= 0) 990 return -EIO; 991 if (ntracks > MAX_TRACKS) 992 ntracks = MAX_TRACKS; 993 994 /* now read the whole schmeer */ 995 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0, 996 (char *)&toc->hdr, 997 sizeof(struct atapi_toc_header) + 998 (ntracks + 1) * 999 sizeof(struct atapi_toc_entry), sense); 1000 1001 if (stat && toc->hdr.first_track > 1) { 1002 /* 1003 * Cds with CDI tracks only don't have any TOC entries, despite 1004 * of this the returned values are 1005 * first_track == last_track = number of CDI tracks + 1, 1006 * so that this case is indistinguishable from the same layout 1007 * plus an additional audio track. If we get an error for the 1008 * regular case, we assume a CDI without additional audio 1009 * tracks. In this case the readable TOC is empty (CDI tracks 1010 * are not included) and only holds the Leadout entry. 1011 * 1012 * Heiko Eißfeldt. 1013 */ 1014 ntracks = 0; 1015 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0, 1016 (char *)&toc->hdr, 1017 sizeof(struct atapi_toc_header) + 1018 (ntracks + 1) * 1019 sizeof(struct atapi_toc_entry), 1020 sense); 1021 if (stat) 1022 return stat; 1023 1024 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1025 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT); 1026 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT); 1027 } else { 1028 toc->hdr.first_track = CDROM_LEADOUT; 1029 toc->hdr.last_track = CDROM_LEADOUT; 1030 } 1031 } 1032 1033 if (stat) 1034 return stat; 1035 1036 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length); 1037 1038 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1039 toc->hdr.first_track = bcd2bin(toc->hdr.first_track); 1040 toc->hdr.last_track = bcd2bin(toc->hdr.last_track); 1041 } 1042 1043 for (i = 0; i <= ntracks; i++) { 1044 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) { 1045 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) 1046 toc->ent[i].track = bcd2bin(toc->ent[i].track); 1047 msf_from_bcd(&toc->ent[i].addr.msf); 1048 } 1049 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute, 1050 toc->ent[i].addr.msf.second, 1051 toc->ent[i].addr.msf.frame); 1052 } 1053 1054 if (toc->hdr.first_track != CDROM_LEADOUT) { 1055 /* read the multisession information */ 1056 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp, 1057 sizeof(ms_tmp), sense); 1058 if (stat) 1059 return stat; 1060 1061 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba); 1062 } else { 1063 ms_tmp.hdr.last_track = CDROM_LEADOUT; 1064 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track; 1065 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */ 1066 } 1067 1068 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) { 1069 /* re-read multisession information using MSF format */ 1070 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp, 1071 sizeof(ms_tmp), sense); 1072 if (stat) 1073 return stat; 1074 1075 msf_from_bcd(&ms_tmp.ent.addr.msf); 1076 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute, 1077 ms_tmp.ent.addr.msf.second, 1078 ms_tmp.ent.addr.msf.frame); 1079 } 1080 1081 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track); 1082 1083 /* now try to get the total cdrom capacity */ 1084 stat = cdrom_get_last_written(cdi, &last_written); 1085 if (!stat && (last_written > toc->capacity)) { 1086 toc->capacity = last_written; 1087 set_capacity(info->disk, toc->capacity * sectors_per_frame); 1088 drive->probed_capacity = toc->capacity * sectors_per_frame; 1089 } 1090 1091 /* Remember that we've read this stuff. */ 1092 drive->atapi_flags |= IDE_AFLAG_TOC_VALID; 1093 1094 return 0; 1095} 1096 1097int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf) 1098{ 1099 struct cdrom_info *info = drive->driver_data; 1100 struct cdrom_device_info *cdi = &info->devinfo; 1101 struct packet_command cgc; 1102 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE; 1103 1104 ide_debug_log(IDE_DBG_FUNC, "enter"); 1105 1106 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0) 1107 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE; 1108 1109 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN); 1110 do { 1111 /* we seem to get stat=0x01,err=0x00 the first time (??) */ 1112 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0); 1113 if (!stat) 1114 break; 1115 } while (--attempts); 1116 return stat; 1117} 1118 1119void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf) 1120{ 1121 struct cdrom_info *cd = drive->driver_data; 1122 u16 curspeed, maxspeed; 1123 1124 ide_debug_log(IDE_DBG_FUNC, "enter"); 1125 1126 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) { 1127 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]); 1128 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]); 1129 } else { 1130 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]); 1131 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]); 1132 } 1133 1134 ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u", 1135 curspeed, maxspeed); 1136 1137 cd->current_speed = (curspeed + (176/2)) / 176; 1138 cd->max_speed = (maxspeed + (176/2)) / 176; 1139} 1140 1141#define IDE_CD_CAPABILITIES \ 1142 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \ 1143 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \ 1144 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \ 1145 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \ 1146 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM) 1147 1148static struct cdrom_device_ops ide_cdrom_dops = { 1149 .open = ide_cdrom_open_real, 1150 .release = ide_cdrom_release_real, 1151 .drive_status = ide_cdrom_drive_status, 1152 .media_changed = ide_cdrom_check_media_change_real, 1153 .tray_move = ide_cdrom_tray_move, 1154 .lock_door = ide_cdrom_lock_door, 1155 .select_speed = ide_cdrom_select_speed, 1156 .get_last_session = ide_cdrom_get_last_session, 1157 .get_mcn = ide_cdrom_get_mcn, 1158 .reset = ide_cdrom_reset, 1159 .audio_ioctl = ide_cdrom_audio_ioctl, 1160 .capability = IDE_CD_CAPABILITIES, 1161 .generic_packet = ide_cdrom_packet, 1162}; 1163 1164static int ide_cdrom_register(ide_drive_t *drive, int nslots) 1165{ 1166 struct cdrom_info *info = drive->driver_data; 1167 struct cdrom_device_info *devinfo = &info->devinfo; 1168 1169 ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots); 1170 1171 devinfo->ops = &ide_cdrom_dops; 1172 devinfo->speed = info->current_speed; 1173 devinfo->capacity = nslots; 1174 devinfo->handle = drive; 1175 strcpy(devinfo->name, drive->name); 1176 1177 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT) 1178 devinfo->mask |= CDC_SELECT_SPEED; 1179 1180 devinfo->disk = info->disk; 1181 return register_cdrom(devinfo); 1182} 1183 1184static int ide_cdrom_probe_capabilities(ide_drive_t *drive) 1185{ 1186 struct cdrom_info *cd = drive->driver_data; 1187 struct cdrom_device_info *cdi = &cd->devinfo; 1188 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE]; 1189 mechtype_t mechtype; 1190 int nslots = 1; 1191 1192 ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx", 1193 drive->media, drive->atapi_flags); 1194 1195 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R | 1196 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO | 1197 CDC_MO_DRIVE | CDC_RAM); 1198 1199 if (drive->media == ide_optical) { 1200 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM); 1201 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n", 1202 drive->name); 1203 return nslots; 1204 } 1205 1206 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) { 1207 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT; 1208 cdi->mask &= ~CDC_PLAY_AUDIO; 1209 return nslots; 1210 } 1211 1212 /* 1213 * We have to cheat a little here. the packet will eventually be queued 1214 * with ide_cdrom_packet(), which extracts the drive from cdi->handle. 1215 * Since this device hasn't been registered with the Uniform layer yet, 1216 * it can't do this. Same goes for cdi->ops. 1217 */ 1218 cdi->handle = drive; 1219 cdi->ops = &ide_cdrom_dops; 1220 1221 if (ide_cdrom_get_capabilities(drive, buf)) 1222 return 0; 1223 1224 if ((buf[8 + 6] & 0x01) == 0) 1225 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING; 1226 if (buf[8 + 6] & 0x08) 1227 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT; 1228 if (buf[8 + 3] & 0x01) 1229 cdi->mask &= ~CDC_CD_R; 1230 if (buf[8 + 3] & 0x02) 1231 cdi->mask &= ~(CDC_CD_RW | CDC_RAM); 1232 if (buf[8 + 2] & 0x38) 1233 cdi->mask &= ~CDC_DVD; 1234 if (buf[8 + 3] & 0x20) 1235 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM); 1236 if (buf[8 + 3] & 0x10) 1237 cdi->mask &= ~CDC_DVD_R; 1238 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK)) 1239 cdi->mask &= ~CDC_PLAY_AUDIO; 1240 1241 mechtype = buf[8 + 6] >> 5; 1242 if (mechtype == mechtype_caddy || 1243 mechtype == mechtype_popup || 1244 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE)) 1245 cdi->mask |= CDC_CLOSE_TRAY; 1246 1247 if (cdi->sanyo_slot > 0) { 1248 cdi->mask &= ~CDC_SELECT_DISC; 1249 nslots = 3; 1250 } else if (mechtype == mechtype_individual_changer || 1251 mechtype == mechtype_cartridge_changer) { 1252 nslots = cdrom_number_of_slots(cdi); 1253 if (nslots > 1) 1254 cdi->mask &= ~CDC_SELECT_DISC; 1255 } 1256 1257 ide_cdrom_update_speed(drive, buf); 1258 1259 printk(KERN_INFO PFX "%s: ATAPI", drive->name); 1260 1261 /* don't print speed if the drive reported 0 */ 1262 if (cd->max_speed) 1263 printk(KERN_CONT " %dX", cd->max_speed); 1264 1265 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM"); 1266 1267 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0) 1268 printk(KERN_CONT " DVD%s%s", 1269 (cdi->mask & CDC_DVD_R) ? "" : "-R", 1270 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM"); 1271 1272 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0) 1273 printk(KERN_CONT " CD%s%s", 1274 (cdi->mask & CDC_CD_R) ? "" : "-R", 1275 (cdi->mask & CDC_CD_RW) ? "" : "/RW"); 1276 1277 if ((cdi->mask & CDC_SELECT_DISC) == 0) 1278 printk(KERN_CONT " changer w/%d slots", nslots); 1279 else 1280 printk(KERN_CONT " drive"); 1281 1282 printk(KERN_CONT ", %dkB Cache\n", 1283 be16_to_cpup((__be16 *)&buf[8 + 12])); 1284 1285 return nslots; 1286} 1287 1288/* standard prep_rq_fn that builds 10 byte cmds */ 1289static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq) 1290{ 1291 int hard_sect = queue_logical_block_size(q); 1292 long block = (long)blk_rq_pos(rq) / (hard_sect >> 9); 1293 unsigned long blocks = blk_rq_sectors(rq) / (hard_sect >> 9); 1294 1295 memset(rq->cmd, 0, BLK_MAX_CDB); 1296 1297 if (rq_data_dir(rq) == READ) 1298 rq->cmd[0] = GPCMD_READ_10; 1299 else 1300 rq->cmd[0] = GPCMD_WRITE_10; 1301 1302 /* 1303 * fill in lba 1304 */ 1305 rq->cmd[2] = (block >> 24) & 0xff; 1306 rq->cmd[3] = (block >> 16) & 0xff; 1307 rq->cmd[4] = (block >> 8) & 0xff; 1308 rq->cmd[5] = block & 0xff; 1309 1310 /* 1311 * and transfer length 1312 */ 1313 rq->cmd[7] = (blocks >> 8) & 0xff; 1314 rq->cmd[8] = blocks & 0xff; 1315 rq->cmd_len = 10; 1316 return BLKPREP_OK; 1317} 1318 1319/* 1320 * Most of the SCSI commands are supported directly by ATAPI devices. 1321 * This transform handles the few exceptions. 1322 */ 1323static int ide_cdrom_prep_pc(struct request *rq) 1324{ 1325 u8 *c = rq->cmd; 1326 1327 /* transform 6-byte read/write commands to the 10-byte version */ 1328 if (c[0] == READ_6 || c[0] == WRITE_6) { 1329 c[8] = c[4]; 1330 c[5] = c[3]; 1331 c[4] = c[2]; 1332 c[3] = c[1] & 0x1f; 1333 c[2] = 0; 1334 c[1] &= 0xe0; 1335 c[0] += (READ_10 - READ_6); 1336 rq->cmd_len = 10; 1337 return BLKPREP_OK; 1338 } 1339 1340 /* 1341 * it's silly to pretend we understand 6-byte sense commands, just 1342 * reject with ILLEGAL_REQUEST and the caller should take the 1343 * appropriate action 1344 */ 1345 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) { 1346 rq->errors = ILLEGAL_REQUEST; 1347 return BLKPREP_KILL; 1348 } 1349 1350 return BLKPREP_OK; 1351} 1352 1353static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq) 1354{ 1355 if (blk_fs_request(rq)) 1356 return ide_cdrom_prep_fs(q, rq); 1357 else if (blk_pc_request(rq)) 1358 return ide_cdrom_prep_pc(rq); 1359 1360 return 0; 1361} 1362 1363struct cd_list_entry { 1364 const char *id_model; 1365 const char *id_firmware; 1366 unsigned int cd_flags; 1367}; 1368 1369#ifdef CONFIG_IDE_PROC_FS 1370static sector_t ide_cdrom_capacity(ide_drive_t *drive) 1371{ 1372 unsigned long capacity, sectors_per_frame; 1373 1374 if (cdrom_read_capacity(drive, &capacity, §ors_per_frame, NULL)) 1375 return 0; 1376 1377 return capacity * sectors_per_frame; 1378} 1379 1380static int proc_idecd_read_capacity(char *page, char **start, off_t off, 1381 int count, int *eof, void *data) 1382{ 1383 ide_drive_t *drive = data; 1384 int len; 1385 1386 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive)); 1387 PROC_IDE_READ_RETURN(page, start, off, count, eof, len); 1388} 1389 1390static ide_proc_entry_t idecd_proc[] = { 1391 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL }, 1392 { NULL, 0, NULL, NULL } 1393}; 1394 1395static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive) 1396{ 1397 return idecd_proc; 1398} 1399 1400static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive) 1401{ 1402 return NULL; 1403} 1404#endif 1405 1406static const struct cd_list_entry ide_cd_quirks_list[] = { 1407 /* SCR-3231 doesn't support the SET_CD_SPEED command. */ 1408 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT }, 1409 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */ 1410 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD | 1411 IDE_AFLAG_PRE_ATAPI12, }, 1412 /* Vertos 300, some versions of this drive like to talk BCD. */ 1413 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, }, 1414 /* Vertos 600 ESD. */ 1415 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, }, 1416 /* 1417 * Sanyo 3 CD changer uses a non-standard command for CD changing 1418 * (by default standard ATAPI support for CD changers is used). 1419 */ 1420 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD }, 1421 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD }, 1422 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD }, 1423 /* Stingray 8X CD-ROM. */ 1424 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 }, 1425 /* 1426 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length 1427 * mode sense page capabilities size, but older drives break. 1428 */ 1429 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE }, 1430 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE }, 1431 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */ 1432 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS }, 1433 /* 1434 * Some drives used by Apple don't advertise audio play 1435 * but they do support reading TOC & audio datas. 1436 */ 1437 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1438 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1439 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1440 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1441 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1442 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1443 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE }, 1444 { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE }, 1445 { NULL, NULL, 0 } 1446}; 1447 1448static unsigned int ide_cd_flags(u16 *id) 1449{ 1450 const struct cd_list_entry *cle = ide_cd_quirks_list; 1451 1452 while (cle->id_model) { 1453 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 && 1454 (cle->id_firmware == NULL || 1455 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware))) 1456 return cle->cd_flags; 1457 cle++; 1458 } 1459 1460 return 0; 1461} 1462 1463static int ide_cdrom_setup(ide_drive_t *drive) 1464{ 1465 struct cdrom_info *cd = drive->driver_data; 1466 struct cdrom_device_info *cdi = &cd->devinfo; 1467 struct request_queue *q = drive->queue; 1468 u16 *id = drive->id; 1469 char *fw_rev = (char *)&id[ATA_ID_FW_REV]; 1470 int nslots; 1471 1472 ide_debug_log(IDE_DBG_PROBE, "enter"); 1473 1474 blk_queue_prep_rq(q, ide_cdrom_prep_fn); 1475 blk_queue_dma_alignment(q, 31); 1476 blk_queue_update_dma_pad(q, 15); 1477 1478 q->unplug_delay = max((1 * HZ) / 1000, 1); 1479 1480 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED; 1481 drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id); 1482 1483 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) && 1484 fw_rev[4] == '1' && fw_rev[6] <= '2') 1485 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD | 1486 IDE_AFLAG_TOCADDR_AS_BCD); 1487 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) && 1488 fw_rev[4] == '1' && fw_rev[6] <= '2') 1489 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD; 1490 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD) 1491 /* 3 => use CD in slot 0 */ 1492 cdi->sanyo_slot = 3; 1493 1494 nslots = ide_cdrom_probe_capabilities(drive); 1495 1496 blk_queue_logical_block_size(q, CD_FRAMESIZE); 1497 1498 if (ide_cdrom_register(drive, nslots)) { 1499 printk(KERN_ERR PFX "%s: %s failed to register device with the" 1500 " cdrom driver.\n", drive->name, __func__); 1501 cd->devinfo.handle = NULL; 1502 return 1; 1503 } 1504 1505 ide_proc_register_driver(drive, cd->driver); 1506 return 0; 1507} 1508 1509static void ide_cd_remove(ide_drive_t *drive) 1510{ 1511 struct cdrom_info *info = drive->driver_data; 1512 1513 ide_debug_log(IDE_DBG_FUNC, "enter"); 1514 1515 ide_proc_unregister_driver(drive, info->driver); 1516 device_del(&info->dev); 1517 del_gendisk(info->disk); 1518 1519 mutex_lock(&idecd_ref_mutex); 1520 put_device(&info->dev); 1521 mutex_unlock(&idecd_ref_mutex); 1522} 1523 1524static void ide_cd_release(struct device *dev) 1525{ 1526 struct cdrom_info *info = to_ide_drv(dev, cdrom_info); 1527 struct cdrom_device_info *devinfo = &info->devinfo; 1528 ide_drive_t *drive = info->drive; 1529 struct gendisk *g = info->disk; 1530 1531 ide_debug_log(IDE_DBG_FUNC, "enter"); 1532 1533 kfree(info->toc); 1534 if (devinfo->handle == drive) 1535 unregister_cdrom(devinfo); 1536 drive->driver_data = NULL; 1537 blk_queue_prep_rq(drive->queue, NULL); 1538 g->private_data = NULL; 1539 put_disk(g); 1540 kfree(info); 1541} 1542 1543static int ide_cd_probe(ide_drive_t *); 1544 1545static struct ide_driver ide_cdrom_driver = { 1546 .gen_driver = { 1547 .owner = THIS_MODULE, 1548 .name = "ide-cdrom", 1549 .bus = &ide_bus_type, 1550 }, 1551 .probe = ide_cd_probe, 1552 .remove = ide_cd_remove, 1553 .version = IDECD_VERSION, 1554 .do_request = ide_cd_do_request, 1555#ifdef CONFIG_IDE_PROC_FS 1556 .proc_entries = ide_cd_proc_entries, 1557 .proc_devsets = ide_cd_proc_devsets, 1558#endif 1559}; 1560 1561static int idecd_open(struct block_device *bdev, fmode_t mode) 1562{ 1563 struct cdrom_info *info = ide_cd_get(bdev->bd_disk); 1564 int rc = -ENOMEM; 1565 1566 if (!info) 1567 return -ENXIO; 1568 1569 rc = cdrom_open(&info->devinfo, bdev, mode); 1570 1571 if (rc < 0) 1572 ide_cd_put(info); 1573 1574 return rc; 1575} 1576 1577static int idecd_release(struct gendisk *disk, fmode_t mode) 1578{ 1579 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 1580 1581 cdrom_release(&info->devinfo, mode); 1582 1583 ide_cd_put(info); 1584 1585 return 0; 1586} 1587 1588static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg) 1589{ 1590 struct packet_command cgc; 1591 char buffer[16]; 1592 int stat; 1593 char spindown; 1594 1595 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char))) 1596 return -EFAULT; 1597 1598 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN); 1599 1600 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0); 1601 if (stat) 1602 return stat; 1603 1604 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f); 1605 return cdrom_mode_select(cdi, &cgc); 1606} 1607 1608static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg) 1609{ 1610 struct packet_command cgc; 1611 char buffer[16]; 1612 int stat; 1613 char spindown; 1614 1615 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN); 1616 1617 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0); 1618 if (stat) 1619 return stat; 1620 1621 spindown = buffer[11] & 0x0f; 1622 if (copy_to_user((void __user *)arg, &spindown, sizeof(char))) 1623 return -EFAULT; 1624 return 0; 1625} 1626 1627static int idecd_ioctl(struct block_device *bdev, fmode_t mode, 1628 unsigned int cmd, unsigned long arg) 1629{ 1630 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info); 1631 int err; 1632 1633 switch (cmd) { 1634 case CDROMSETSPINDOWN: 1635 return idecd_set_spindown(&info->devinfo, arg); 1636 case CDROMGETSPINDOWN: 1637 return idecd_get_spindown(&info->devinfo, arg); 1638 default: 1639 break; 1640 } 1641 1642 err = generic_ide_ioctl(info->drive, bdev, cmd, arg); 1643 if (err == -EINVAL) 1644 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg); 1645 1646 return err; 1647} 1648 1649static int idecd_media_changed(struct gendisk *disk) 1650{ 1651 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 1652 return cdrom_media_changed(&info->devinfo); 1653} 1654 1655static int idecd_revalidate_disk(struct gendisk *disk) 1656{ 1657 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 1658 struct request_sense sense; 1659 1660 ide_cd_read_toc(info->drive, &sense); 1661 1662 return 0; 1663} 1664 1665static struct block_device_operations idecd_ops = { 1666 .owner = THIS_MODULE, 1667 .open = idecd_open, 1668 .release = idecd_release, 1669 .locked_ioctl = idecd_ioctl, 1670 .media_changed = idecd_media_changed, 1671 .revalidate_disk = idecd_revalidate_disk 1672}; 1673 1674/* module options */ 1675static unsigned long debug_mask; 1676module_param(debug_mask, ulong, 0644); 1677 1678MODULE_DESCRIPTION("ATAPI CD-ROM Driver"); 1679 1680static int ide_cd_probe(ide_drive_t *drive) 1681{ 1682 struct cdrom_info *info; 1683 struct gendisk *g; 1684 struct request_sense sense; 1685 1686 ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x", 1687 drive->driver_req, drive->media); 1688 1689 if (!strstr("ide-cdrom", drive->driver_req)) 1690 goto failed; 1691 1692 if (drive->media != ide_cdrom && drive->media != ide_optical) 1693 goto failed; 1694 1695 drive->debug_mask = debug_mask; 1696 drive->irq_handler = cdrom_newpc_intr; 1697 1698 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL); 1699 if (info == NULL) { 1700 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n", 1701 drive->name); 1702 goto failed; 1703 } 1704 1705 g = alloc_disk(1 << PARTN_BITS); 1706 if (!g) 1707 goto out_free_cd; 1708 1709 ide_init_disk(g, drive); 1710 1711 info->dev.parent = &drive->gendev; 1712 info->dev.release = ide_cd_release; 1713 dev_set_name(&info->dev, dev_name(&drive->gendev)); 1714 1715 if (device_register(&info->dev)) 1716 goto out_free_disk; 1717 1718 info->drive = drive; 1719 info->driver = &ide_cdrom_driver; 1720 info->disk = g; 1721 1722 g->private_data = &info->driver; 1723 1724 drive->driver_data = info; 1725 1726 g->minors = 1; 1727 g->driverfs_dev = &drive->gendev; 1728 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE; 1729 if (ide_cdrom_setup(drive)) { 1730 put_device(&info->dev); 1731 goto failed; 1732 } 1733 1734 ide_cd_read_toc(drive, &sense); 1735 g->fops = &idecd_ops; 1736 g->flags |= GENHD_FL_REMOVABLE; 1737 add_disk(g); 1738 return 0; 1739 1740out_free_disk: 1741 put_disk(g); 1742out_free_cd: 1743 kfree(info); 1744failed: 1745 return -ENODEV; 1746} 1747 1748static void __exit ide_cdrom_exit(void) 1749{ 1750 driver_unregister(&ide_cdrom_driver.gen_driver); 1751} 1752 1753static int __init ide_cdrom_init(void) 1754{ 1755 printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n"); 1756 return driver_register(&ide_cdrom_driver.gen_driver); 1757} 1758 1759MODULE_ALIAS("ide:*m-cdrom*"); 1760MODULE_ALIAS("ide-cd"); 1761module_init(ide_cdrom_init); 1762module_exit(ide_cdrom_exit); 1763MODULE_LICENSE("GPL"); 1764