ide-cd.c revision 805ec58ad7fd1f65eeb75ed38f11bd08fbd3b988
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 struct request_sense *sense) 97{ 98 int log = 0; 99 100 ide_debug_log(IDE_DBG_SENSE, "sense_key: 0x%x", sense->sense_key); 101 102 if (!sense || !rq || (rq->cmd_flags & REQ_QUIET)) 103 return 0; 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 struct request_sense *sense) 145{ 146 unsigned long sector; 147 unsigned long bio_sectors; 148 struct cdrom_info *info = drive->driver_data; 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, sense)) 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 (drive->queue->hardsect_size == 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 cdrom_queue_request_sense(ide_drive_t *drive, void *sense, 210 struct request *failed_command) 211{ 212 struct cdrom_info *info = drive->driver_data; 213 struct request *rq = &drive->request_sense_rq; 214 215 ide_debug_log(IDE_DBG_SENSE, "enter"); 216 217 if (sense == NULL) 218 sense = &info->sense_data; 219 220 /* stuff the sense request in front of our current request */ 221 blk_rq_init(NULL, rq); 222 rq->cmd_type = REQ_TYPE_ATA_PC; 223 rq->rq_disk = info->disk; 224 225 rq->data = sense; 226 rq->cmd[0] = GPCMD_REQUEST_SENSE; 227 rq->cmd[4] = 18; 228 rq->data_len = 18; 229 230 rq->cmd_type = REQ_TYPE_SENSE; 231 rq->cmd_flags |= REQ_PREEMPT; 232 233 /* NOTE! Save the failed command in "rq->buffer" */ 234 rq->buffer = (void *) failed_command; 235 236 if (failed_command) 237 ide_debug_log(IDE_DBG_SENSE, "failed_cmd: 0x%x", 238 failed_command->cmd[0]); 239 240 drive->hwif->rq = NULL; 241 242 elv_add_request(drive->queue, rq, ELEVATOR_INSERT_FRONT, 0); 243} 244 245static void ide_cd_complete_failed_rq(ide_drive_t *drive, struct request *rq) 246{ 247 /* 248 * For REQ_TYPE_SENSE, "rq->buffer" points to the original 249 * failed request 250 */ 251 struct request *failed = (struct request *)rq->buffer; 252 struct cdrom_info *info = drive->driver_data; 253 void *sense = &info->sense_data; 254 255 if (failed) { 256 if (failed->sense) { 257 sense = failed->sense; 258 failed->sense_len = rq->sense_len; 259 } 260 cdrom_analyze_sense_data(drive, failed, sense); 261 262 if (ide_end_rq(drive, failed, -EIO, blk_rq_bytes(failed))) 263 BUG(); 264 } else 265 cdrom_analyze_sense_data(drive, NULL, sense); 266} 267 268 269/* 270 * Allow the drive 5 seconds to recover; some devices will return NOT_READY 271 * while flushing data from cache. 272 * 273 * returns: 0 failed (write timeout expired) 274 * 1 success 275 */ 276static int ide_cd_breathe(ide_drive_t *drive, struct request *rq) 277{ 278 279 struct cdrom_info *info = drive->driver_data; 280 281 if (!rq->errors) 282 info->write_timeout = jiffies + ATAPI_WAIT_WRITE_BUSY; 283 284 rq->errors = 1; 285 286 if (time_after(jiffies, info->write_timeout)) 287 return 0; 288 else { 289 struct request_queue *q = drive->queue; 290 unsigned long flags; 291 292 /* 293 * take a breather relying on the unplug timer to kick us again 294 */ 295 296 spin_lock_irqsave(q->queue_lock, flags); 297 blk_plug_device(q); 298 spin_unlock_irqrestore(q->queue_lock, flags); 299 300 return 1; 301 } 302} 303 304/** 305 * Returns: 306 * 0: if the request should be continued. 307 * 1: if the request will be going through error recovery. 308 * 2: if the request should be ended. 309 */ 310static int cdrom_decode_status(ide_drive_t *drive, u8 stat) 311{ 312 ide_hwif_t *hwif = drive->hwif; 313 struct request *rq = hwif->rq; 314 int err, sense_key; 315 316 /* get the IDE error register */ 317 err = ide_read_error(drive); 318 sense_key = err >> 4; 319 320 ide_debug_log(IDE_DBG_RQ, "cmd[0]: 0x%x, rq->cmd_type: 0x%x, err: 0x%x", 321 rq->cmd[0], rq->cmd_type, err); 322 323 if (blk_sense_request(rq)) { 324 /* 325 * We got an error trying to get sense info from the drive 326 * (probably while trying to recover from a former error). 327 * Just give up. 328 */ 329 rq->cmd_flags |= REQ_FAILED; 330 return 2; 331 } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) { 332 /* All other functions, except for READ. */ 333 334 /* 335 * if we have an error, pass back CHECK_CONDITION as the 336 * scsi status byte 337 */ 338 if (blk_pc_request(rq) && !rq->errors) 339 rq->errors = SAM_STAT_CHECK_CONDITION; 340 341 /* check for tray open */ 342 if (sense_key == NOT_READY) { 343 cdrom_saw_media_change(drive); 344 } else if (sense_key == UNIT_ATTENTION) { 345 /* check for media change */ 346 cdrom_saw_media_change(drive); 347 return 0; 348 } else if (sense_key == ILLEGAL_REQUEST && 349 rq->cmd[0] == GPCMD_START_STOP_UNIT) { 350 /* 351 * Don't print error message for this condition-- 352 * SFF8090i indicates that 5/24/00 is the correct 353 * response to a request to close the tray if the 354 * drive doesn't have that capability. 355 * cdrom_log_sense() knows this! 356 */ 357 } else if (!(rq->cmd_flags & REQ_QUIET)) { 358 /* otherwise, print an error */ 359 ide_dump_status(drive, "packet command error", stat); 360 } 361 362 rq->cmd_flags |= REQ_FAILED; 363 364 /* 365 * instead of playing games with moving completions around, 366 * remove failed request completely and end it when the 367 * request sense has completed 368 */ 369 goto end_request; 370 371 } else if (blk_fs_request(rq)) { 372 int do_end_request = 0; 373 374 /* handle errors from READ and WRITE requests */ 375 376 if (blk_noretry_request(rq)) 377 do_end_request = 1; 378 379 if (sense_key == NOT_READY) { 380 /* tray open */ 381 if (rq_data_dir(rq) == READ) { 382 cdrom_saw_media_change(drive); 383 384 /* fail the request */ 385 printk(KERN_ERR PFX "%s: tray open\n", 386 drive->name); 387 } else { 388 if (ide_cd_breathe(drive, rq)) 389 return 1; 390 } 391 do_end_request = 1; 392 } else if (sense_key == UNIT_ATTENTION) { 393 /* media change */ 394 cdrom_saw_media_change(drive); 395 396 /* 397 * Arrange to retry the request but be sure to give up 398 * if we've retried too many times. 399 */ 400 if (++rq->errors > ERROR_MAX) 401 do_end_request = 1; 402 } else if (sense_key == ILLEGAL_REQUEST || 403 sense_key == DATA_PROTECT) { 404 /* 405 * No point in retrying after an illegal request or data 406 * protect error. 407 */ 408 ide_dump_status(drive, "command error", stat); 409 do_end_request = 1; 410 } else if (sense_key == MEDIUM_ERROR) { 411 /* 412 * No point in re-trying a zillion times on a bad 413 * sector. If we got here the error is not correctable. 414 */ 415 ide_dump_status(drive, "media error (bad sector)", 416 stat); 417 do_end_request = 1; 418 } else if (sense_key == BLANK_CHECK) { 419 /* disk appears blank ?? */ 420 ide_dump_status(drive, "media error (blank)", stat); 421 do_end_request = 1; 422 } else if ((err & ~ATA_ABORTED) != 0) { 423 /* go to the default handler for other errors */ 424 ide_error(drive, "cdrom_decode_status", stat); 425 return 1; 426 } else if ((++rq->errors > ERROR_MAX)) { 427 /* we've racked up too many retries, abort */ 428 do_end_request = 1; 429 } 430 431 /* 432 * End a request through request sense analysis when we have 433 * sense data. We need this in order to perform end of media 434 * processing. 435 */ 436 if (do_end_request) 437 goto end_request; 438 439 /* 440 * If we got a CHECK_CONDITION status, queue 441 * a request sense command. 442 */ 443 if (stat & ATA_ERR) 444 cdrom_queue_request_sense(drive, NULL, NULL); 445 return 1; 446 } else { 447 blk_dump_rq_flags(rq, PFX "bad rq"); 448 return 2; 449 } 450 451end_request: 452 if (stat & ATA_ERR) { 453 struct request_queue *q = drive->queue; 454 unsigned long flags; 455 456 spin_lock_irqsave(q->queue_lock, flags); 457 blkdev_dequeue_request(rq); 458 spin_unlock_irqrestore(q->queue_lock, flags); 459 460 hwif->rq = NULL; 461 462 cdrom_queue_request_sense(drive, rq->sense, rq); 463 return 1; 464 } else 465 return 2; 466} 467 468/* 469 * Check the contents of the interrupt reason register from the cdrom 470 * and attempt to recover if there are problems. Returns 0 if everything's 471 * ok; nonzero if the request has been terminated. 472 */ 473static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq, 474 int len, int ireason, int rw) 475{ 476 ide_hwif_t *hwif = drive->hwif; 477 478 ide_debug_log(IDE_DBG_FUNC, "ireason: 0x%x, rw: 0x%x", ireason, rw); 479 480 /* 481 * ireason == 0: the drive wants to receive data from us 482 * ireason == 2: the drive is expecting to transfer data to us 483 */ 484 if (ireason == (!rw << 1)) 485 return 0; 486 else if (ireason == (rw << 1)) { 487 488 /* whoops... */ 489 printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n", 490 drive->name, __func__); 491 492 ide_pad_transfer(drive, rw, len); 493 } else if (rw == 0 && ireason == 1) { 494 /* 495 * Some drives (ASUS) seem to tell us that status info is 496 * available. Just get it and ignore. 497 */ 498 (void)hwif->tp_ops->read_status(hwif); 499 return 0; 500 } else { 501 /* drive wants a command packet, or invalid ireason... */ 502 printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n", 503 drive->name, __func__, ireason); 504 } 505 506 if (rq->cmd_type == REQ_TYPE_ATA_PC) 507 rq->cmd_flags |= REQ_FAILED; 508 509 return -1; 510} 511 512static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct ide_cmd *cmd) 513{ 514 struct request *rq = cmd->rq; 515 516 ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]); 517 518 /* 519 * Some of the trailing request sense fields are optional, 520 * and some drives don't send them. Sigh. 521 */ 522 if (rq->cmd[0] == GPCMD_REQUEST_SENSE && 523 cmd->nleft > 0 && cmd->nleft <= 5) { 524 unsigned int ofs = cmd->nbytes - cmd->nleft; 525 526 while (cmd->nleft > 0) { 527 *((u8 *)rq->data + ofs++) = 0; 528 cmd->nleft--; 529 } 530 } 531} 532 533int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd, 534 int write, void *buffer, unsigned *bufflen, 535 struct request_sense *sense, int timeout, 536 unsigned int cmd_flags) 537{ 538 struct cdrom_info *info = drive->driver_data; 539 struct request_sense local_sense; 540 int retries = 10; 541 unsigned int flags = 0; 542 543 if (!sense) 544 sense = &local_sense; 545 546 ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, " 547 "cmd_flags: 0x%x", 548 cmd[0], write, timeout, cmd_flags); 549 550 /* start of retry loop */ 551 do { 552 struct request *rq; 553 int error; 554 555 rq = blk_get_request(drive->queue, write, __GFP_WAIT); 556 557 memcpy(rq->cmd, cmd, BLK_MAX_CDB); 558 rq->cmd_type = REQ_TYPE_ATA_PC; 559 rq->sense = sense; 560 rq->cmd_flags |= cmd_flags; 561 rq->timeout = timeout; 562 if (buffer) { 563 rq->data = buffer; 564 rq->data_len = *bufflen; 565 } 566 567 error = blk_execute_rq(drive->queue, info->disk, rq, 0); 568 569 if (buffer) 570 *bufflen = rq->data_len; 571 572 flags = rq->cmd_flags; 573 blk_put_request(rq); 574 575 /* 576 * FIXME: we should probably abort/retry or something in case of 577 * failure. 578 */ 579 if (flags & REQ_FAILED) { 580 /* 581 * The request failed. Retry if it was due to a unit 582 * attention status (usually means media was changed). 583 */ 584 struct request_sense *reqbuf = sense; 585 586 if (reqbuf->sense_key == UNIT_ATTENTION) 587 cdrom_saw_media_change(drive); 588 else if (reqbuf->sense_key == NOT_READY && 589 reqbuf->asc == 4 && reqbuf->ascq != 4) { 590 /* 591 * The drive is in the process of loading 592 * a disk. Retry, but wait a little to give 593 * the drive time to complete the load. 594 */ 595 ssleep(2); 596 } else { 597 /* otherwise, don't retry */ 598 retries = 0; 599 } 600 --retries; 601 } 602 603 /* end of retry loop */ 604 } while ((flags & REQ_FAILED) && retries >= 0); 605 606 /* return an error if the command failed */ 607 return (flags & REQ_FAILED) ? -EIO : 0; 608} 609 610static void ide_cd_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd) 611{ 612 unsigned int nr_bytes = cmd->nbytes - cmd->nleft; 613 614 if (cmd->tf_flags & IDE_TFLAG_WRITE) 615 nr_bytes -= cmd->last_xfer_len; 616 617 if (nr_bytes > 0) 618 ide_complete_rq(drive, 0, nr_bytes); 619} 620 621static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive) 622{ 623 ide_hwif_t *hwif = drive->hwif; 624 struct ide_cmd *cmd = &hwif->cmd; 625 struct request *rq = hwif->rq; 626 ide_expiry_t *expiry = NULL; 627 int dma_error = 0, dma, thislen, uptodate = 0; 628 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc, nsectors; 629 int sense = blk_sense_request(rq); 630 unsigned int timeout; 631 u16 len; 632 u8 ireason, stat; 633 634 ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x", 635 rq->cmd[0], write); 636 637 /* check for errors */ 638 dma = drive->dma; 639 if (dma) { 640 drive->dma = 0; 641 drive->waiting_for_dma = 0; 642 dma_error = hwif->dma_ops->dma_end(drive); 643 ide_dma_unmap_sg(drive, cmd); 644 if (dma_error) { 645 printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name, 646 write ? "write" : "read"); 647 ide_dma_off(drive); 648 } 649 } 650 651 /* check status */ 652 stat = hwif->tp_ops->read_status(hwif); 653 654 if (!OK_STAT(stat, 0, BAD_R_STAT)) { 655 rc = cdrom_decode_status(drive, stat); 656 if (rc) { 657 if (rc == 2) 658 goto out_end; 659 return ide_stopped; 660 } 661 } 662 663 /* using dma, transfer is complete now */ 664 if (dma) { 665 if (dma_error) 666 return ide_error(drive, "dma error", stat); 667 uptodate = 1; 668 goto out_end; 669 } 670 671 ide_read_bcount_and_ireason(drive, &len, &ireason); 672 673 thislen = blk_fs_request(rq) ? len : cmd->nleft; 674 if (thislen > len) 675 thislen = len; 676 677 ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d", 678 stat, thislen); 679 680 /* If DRQ is clear, the command has completed. */ 681 if ((stat & ATA_DRQ) == 0) { 682 if (blk_fs_request(rq)) { 683 /* 684 * If we're not done reading/writing, complain. 685 * Otherwise, complete the command normally. 686 */ 687 uptodate = 1; 688 if (cmd->nleft > 0) { 689 printk(KERN_ERR PFX "%s: %s: data underrun " 690 "(%u bytes)\n", drive->name, __func__, 691 cmd->nleft); 692 if (!write) 693 rq->cmd_flags |= REQ_FAILED; 694 uptodate = 0; 695 } 696 } else if (!blk_pc_request(rq)) { 697 ide_cd_request_sense_fixup(drive, cmd); 698 /* complain if we still have data left to transfer */ 699 uptodate = cmd->nleft ? 0 : 1; 700 if (uptodate == 0) 701 rq->cmd_flags |= REQ_FAILED; 702 } 703 goto out_end; 704 } 705 706 /* check which way to transfer data */ 707 rc = ide_cd_check_ireason(drive, rq, len, ireason, write); 708 if (rc) 709 goto out_end; 710 711 cmd->last_xfer_len = 0; 712 713 ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, " 714 "ireason: 0x%x", 715 rq->cmd_type, ireason); 716 717 /* transfer data */ 718 while (thislen > 0) { 719 int blen = min_t(int, thislen, cmd->nleft); 720 721 if (cmd->nleft == 0) 722 break; 723 724 ide_pio_bytes(drive, cmd, write, blen); 725 cmd->last_xfer_len += blen; 726 727 thislen -= blen; 728 len -= blen; 729 730 if (sense && write == 0) 731 rq->sense_len += blen; 732 } 733 734 /* pad, if necessary */ 735 if (len > 0) { 736 if (blk_fs_request(rq) == 0 || write == 0) 737 ide_pad_transfer(drive, write, len); 738 else { 739 printk(KERN_ERR PFX "%s: confused, missing data\n", 740 drive->name); 741 blk_dump_rq_flags(rq, "cdrom_newpc_intr"); 742 } 743 } 744 745 if (blk_pc_request(rq)) { 746 timeout = rq->timeout; 747 } else { 748 timeout = ATAPI_WAIT_PC; 749 if (!blk_fs_request(rq)) 750 expiry = ide_cd_expiry; 751 } 752 753 hwif->expiry = expiry; 754 ide_set_handler(drive, cdrom_newpc_intr, timeout); 755 return ide_started; 756 757out_end: 758 if (blk_pc_request(rq) && rc == 0) { 759 unsigned int dlen = rq->data_len; 760 761 rq->data_len = 0; 762 763 if (blk_end_request(rq, 0, dlen)) 764 BUG(); 765 766 hwif->rq = NULL; 767 } else { 768 if (sense && uptodate) 769 ide_cd_complete_failed_rq(drive, rq); 770 771 if (blk_fs_request(rq)) { 772 if (cmd->nleft == 0) 773 uptodate = 1; 774 } else { 775 if (uptodate <= 0 && rq->errors == 0) 776 rq->errors = -EIO; 777 } 778 779 if (uptodate == 0) 780 ide_cd_error_cmd(drive, cmd); 781 782 /* make sure it's fully ended */ 783 if (blk_pc_request(rq)) 784 nsectors = (rq->data_len + 511) >> 9; 785 else 786 nsectors = rq->hard_nr_sectors; 787 788 if (nsectors == 0) 789 nsectors = 1; 790 791 if (blk_fs_request(rq) == 0) { 792 rq->data_len -= (cmd->nbytes - cmd->nleft); 793 if (uptodate == 0 && (cmd->tf_flags & IDE_TFLAG_WRITE)) 794 rq->data_len += cmd->last_xfer_len; 795 } 796 797 ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9); 798 799 if (sense && rc == 2) 800 ide_error(drive, "request sense failure", stat); 801 } 802 return ide_stopped; 803} 804 805static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq) 806{ 807 struct cdrom_info *cd = drive->driver_data; 808 struct request_queue *q = drive->queue; 809 int write = rq_data_dir(rq) == WRITE; 810 unsigned short sectors_per_frame = 811 queue_hardsect_size(q) >> SECTOR_BITS; 812 813 ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, rq->cmd_flags: 0x%x, " 814 "secs_per_frame: %u", 815 rq->cmd[0], rq->cmd_flags, sectors_per_frame); 816 817 if (write) { 818 /* disk has become write protected */ 819 if (get_disk_ro(cd->disk)) 820 return ide_stopped; 821 } else { 822 /* 823 * We may be retrying this request after an error. Fix up any 824 * weirdness which might be present in the request packet. 825 */ 826 q->prep_rq_fn(q, rq); 827 } 828 829 /* fs requests *must* be hardware frame aligned */ 830 if ((rq->nr_sectors & (sectors_per_frame - 1)) || 831 (rq->sector & (sectors_per_frame - 1))) 832 return ide_stopped; 833 834 /* use DMA, if possible */ 835 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA); 836 837 if (write) 838 cd->devinfo.media_written = 1; 839 840 rq->timeout = ATAPI_WAIT_PC; 841 842 return ide_started; 843} 844 845static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq) 846{ 847 848 ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x", 849 rq->cmd[0], rq->cmd_type); 850 851 if (blk_pc_request(rq)) 852 rq->cmd_flags |= REQ_QUIET; 853 else 854 rq->cmd_flags &= ~REQ_FAILED; 855 856 drive->dma = 0; 857 858 /* sg request */ 859 if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) { 860 struct request_queue *q = drive->queue; 861 unsigned int alignment; 862 char *buf; 863 864 if (rq->bio) 865 buf = bio_data(rq->bio); 866 else 867 buf = rq->data; 868 869 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA); 870 871 /* 872 * check if dma is safe 873 * 874 * NOTE! The "len" and "addr" checks should possibly have 875 * separate masks. 876 */ 877 alignment = queue_dma_alignment(q) | q->dma_pad_mask; 878 if ((unsigned long)buf & alignment 879 || rq->data_len & q->dma_pad_mask 880 || object_is_on_stack(buf)) 881 drive->dma = 0; 882 } 883} 884 885static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq, 886 sector_t block) 887{ 888 struct ide_cmd cmd; 889 int uptodate = 0, nsectors; 890 891 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu", 892 rq->cmd[0], (unsigned long long)block); 893 894 if (drive->debug_mask & IDE_DBG_RQ) 895 blk_dump_rq_flags(rq, "ide_cd_do_request"); 896 897 if (blk_fs_request(rq)) { 898 if (cdrom_start_rw(drive, rq) == ide_stopped) 899 goto out_end; 900 } else if (blk_sense_request(rq) || blk_pc_request(rq) || 901 rq->cmd_type == REQ_TYPE_ATA_PC) { 902 if (!rq->timeout) 903 rq->timeout = ATAPI_WAIT_PC; 904 905 cdrom_do_block_pc(drive, rq); 906 } else if (blk_special_request(rq)) { 907 /* right now this can only be a reset... */ 908 uptodate = 1; 909 goto out_end; 910 } else { 911 blk_dump_rq_flags(rq, DRV_NAME " bad flags"); 912 if (rq->errors == 0) 913 rq->errors = -EIO; 914 goto out_end; 915 } 916 917 memset(&cmd, 0, sizeof(cmd)); 918 919 if (rq_data_dir(rq)) 920 cmd.tf_flags |= IDE_TFLAG_WRITE; 921 922 cmd.rq = rq; 923 924 if (blk_fs_request(rq) || rq->data_len) { 925 ide_init_sg_cmd(&cmd, blk_fs_request(rq) ? (rq->nr_sectors << 9) 926 : rq->data_len); 927 ide_map_sg(drive, &cmd); 928 } 929 930 return ide_issue_pc(drive, &cmd); 931out_end: 932 nsectors = rq->hard_nr_sectors; 933 934 if (nsectors == 0) 935 nsectors = 1; 936 937 ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9); 938 939 return ide_stopped; 940} 941 942/* 943 * Ioctl handling. 944 * 945 * Routines which queue packet commands take as a final argument a pointer to a 946 * request_sense struct. If execution of the command results in an error with a 947 * CHECK CONDITION status, this structure will be filled with the results of the 948 * subsequent request sense command. The pointer can also be NULL, in which case 949 * no sense information is returned. 950 */ 951static void msf_from_bcd(struct atapi_msf *msf) 952{ 953 msf->minute = bcd2bin(msf->minute); 954 msf->second = bcd2bin(msf->second); 955 msf->frame = bcd2bin(msf->frame); 956} 957 958int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense) 959{ 960 struct cdrom_info *info = drive->driver_data; 961 struct cdrom_device_info *cdi = &info->devinfo; 962 unsigned char cmd[BLK_MAX_CDB]; 963 964 ide_debug_log(IDE_DBG_FUNC, "enter"); 965 966 memset(cmd, 0, BLK_MAX_CDB); 967 cmd[0] = GPCMD_TEST_UNIT_READY; 968 969 /* 970 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs 971 * instead of supporting the LOAD_UNLOAD opcode. 972 */ 973 cmd[7] = cdi->sanyo_slot % 3; 974 975 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET); 976} 977 978static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity, 979 unsigned long *sectors_per_frame, 980 struct request_sense *sense) 981{ 982 struct { 983 __be32 lba; 984 __be32 blocklen; 985 } capbuf; 986 987 int stat; 988 unsigned char cmd[BLK_MAX_CDB]; 989 unsigned len = sizeof(capbuf); 990 u32 blocklen; 991 992 ide_debug_log(IDE_DBG_FUNC, "enter"); 993 994 memset(cmd, 0, BLK_MAX_CDB); 995 cmd[0] = GPCMD_READ_CDVD_CAPACITY; 996 997 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0, 998 REQ_QUIET); 999 if (stat) 1000 return stat; 1001 1002 /* 1003 * Sanity check the given block size 1004 */ 1005 blocklen = be32_to_cpu(capbuf.blocklen); 1006 switch (blocklen) { 1007 case 512: 1008 case 1024: 1009 case 2048: 1010 case 4096: 1011 break; 1012 default: 1013 printk(KERN_ERR PFX "%s: weird block size %u\n", 1014 drive->name, blocklen); 1015 printk(KERN_ERR PFX "%s: default to 2kb block size\n", 1016 drive->name); 1017 blocklen = 2048; 1018 break; 1019 } 1020 1021 *capacity = 1 + be32_to_cpu(capbuf.lba); 1022 *sectors_per_frame = blocklen >> SECTOR_BITS; 1023 1024 ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu", 1025 *capacity, *sectors_per_frame); 1026 1027 return 0; 1028} 1029 1030static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag, 1031 int format, char *buf, int buflen, 1032 struct request_sense *sense) 1033{ 1034 unsigned char cmd[BLK_MAX_CDB]; 1035 1036 ide_debug_log(IDE_DBG_FUNC, "enter"); 1037 1038 memset(cmd, 0, BLK_MAX_CDB); 1039 1040 cmd[0] = GPCMD_READ_TOC_PMA_ATIP; 1041 cmd[6] = trackno; 1042 cmd[7] = (buflen >> 8); 1043 cmd[8] = (buflen & 0xff); 1044 cmd[9] = (format << 6); 1045 1046 if (msf_flag) 1047 cmd[1] = 2; 1048 1049 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET); 1050} 1051 1052/* Try to read the entire TOC for the disk into our internal buffer. */ 1053int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense) 1054{ 1055 int stat, ntracks, i; 1056 struct cdrom_info *info = drive->driver_data; 1057 struct cdrom_device_info *cdi = &info->devinfo; 1058 struct atapi_toc *toc = info->toc; 1059 struct { 1060 struct atapi_toc_header hdr; 1061 struct atapi_toc_entry ent; 1062 } ms_tmp; 1063 long last_written; 1064 unsigned long sectors_per_frame = SECTORS_PER_FRAME; 1065 1066 ide_debug_log(IDE_DBG_FUNC, "enter"); 1067 1068 if (toc == NULL) { 1069 /* try to allocate space */ 1070 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL); 1071 if (toc == NULL) { 1072 printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n", 1073 drive->name); 1074 return -ENOMEM; 1075 } 1076 info->toc = toc; 1077 } 1078 1079 /* 1080 * Check to see if the existing data is still valid. If it is, 1081 * just return. 1082 */ 1083 (void) cdrom_check_status(drive, sense); 1084 1085 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID) 1086 return 0; 1087 1088 /* try to get the total cdrom capacity and sector size */ 1089 stat = cdrom_read_capacity(drive, &toc->capacity, §ors_per_frame, 1090 sense); 1091 if (stat) 1092 toc->capacity = 0x1fffff; 1093 1094 set_capacity(info->disk, toc->capacity * sectors_per_frame); 1095 /* save a private copy of the TOC capacity for error handling */ 1096 drive->probed_capacity = toc->capacity * sectors_per_frame; 1097 1098 blk_queue_hardsect_size(drive->queue, 1099 sectors_per_frame << SECTOR_BITS); 1100 1101 /* first read just the header, so we know how long the TOC is */ 1102 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr, 1103 sizeof(struct atapi_toc_header), sense); 1104 if (stat) 1105 return stat; 1106 1107 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1108 toc->hdr.first_track = bcd2bin(toc->hdr.first_track); 1109 toc->hdr.last_track = bcd2bin(toc->hdr.last_track); 1110 } 1111 1112 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1; 1113 if (ntracks <= 0) 1114 return -EIO; 1115 if (ntracks > MAX_TRACKS) 1116 ntracks = MAX_TRACKS; 1117 1118 /* now read the whole schmeer */ 1119 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0, 1120 (char *)&toc->hdr, 1121 sizeof(struct atapi_toc_header) + 1122 (ntracks + 1) * 1123 sizeof(struct atapi_toc_entry), sense); 1124 1125 if (stat && toc->hdr.first_track > 1) { 1126 /* 1127 * Cds with CDI tracks only don't have any TOC entries, despite 1128 * of this the returned values are 1129 * first_track == last_track = number of CDI tracks + 1, 1130 * so that this case is indistinguishable from the same layout 1131 * plus an additional audio track. If we get an error for the 1132 * regular case, we assume a CDI without additional audio 1133 * tracks. In this case the readable TOC is empty (CDI tracks 1134 * are not included) and only holds the Leadout entry. 1135 * 1136 * Heiko Eißfeldt. 1137 */ 1138 ntracks = 0; 1139 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0, 1140 (char *)&toc->hdr, 1141 sizeof(struct atapi_toc_header) + 1142 (ntracks + 1) * 1143 sizeof(struct atapi_toc_entry), 1144 sense); 1145 if (stat) 1146 return stat; 1147 1148 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1149 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT); 1150 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT); 1151 } else { 1152 toc->hdr.first_track = CDROM_LEADOUT; 1153 toc->hdr.last_track = CDROM_LEADOUT; 1154 } 1155 } 1156 1157 if (stat) 1158 return stat; 1159 1160 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length); 1161 1162 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1163 toc->hdr.first_track = bcd2bin(toc->hdr.first_track); 1164 toc->hdr.last_track = bcd2bin(toc->hdr.last_track); 1165 } 1166 1167 for (i = 0; i <= ntracks; i++) { 1168 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) { 1169 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) 1170 toc->ent[i].track = bcd2bin(toc->ent[i].track); 1171 msf_from_bcd(&toc->ent[i].addr.msf); 1172 } 1173 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute, 1174 toc->ent[i].addr.msf.second, 1175 toc->ent[i].addr.msf.frame); 1176 } 1177 1178 if (toc->hdr.first_track != CDROM_LEADOUT) { 1179 /* read the multisession information */ 1180 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp, 1181 sizeof(ms_tmp), sense); 1182 if (stat) 1183 return stat; 1184 1185 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba); 1186 } else { 1187 ms_tmp.hdr.last_track = CDROM_LEADOUT; 1188 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track; 1189 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */ 1190 } 1191 1192 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) { 1193 /* re-read multisession information using MSF format */ 1194 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp, 1195 sizeof(ms_tmp), sense); 1196 if (stat) 1197 return stat; 1198 1199 msf_from_bcd(&ms_tmp.ent.addr.msf); 1200 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute, 1201 ms_tmp.ent.addr.msf.second, 1202 ms_tmp.ent.addr.msf.frame); 1203 } 1204 1205 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track); 1206 1207 /* now try to get the total cdrom capacity */ 1208 stat = cdrom_get_last_written(cdi, &last_written); 1209 if (!stat && (last_written > toc->capacity)) { 1210 toc->capacity = last_written; 1211 set_capacity(info->disk, toc->capacity * sectors_per_frame); 1212 drive->probed_capacity = toc->capacity * sectors_per_frame; 1213 } 1214 1215 /* Remember that we've read this stuff. */ 1216 drive->atapi_flags |= IDE_AFLAG_TOC_VALID; 1217 1218 return 0; 1219} 1220 1221int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf) 1222{ 1223 struct cdrom_info *info = drive->driver_data; 1224 struct cdrom_device_info *cdi = &info->devinfo; 1225 struct packet_command cgc; 1226 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE; 1227 1228 ide_debug_log(IDE_DBG_FUNC, "enter"); 1229 1230 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0) 1231 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE; 1232 1233 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN); 1234 do { 1235 /* we seem to get stat=0x01,err=0x00 the first time (??) */ 1236 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0); 1237 if (!stat) 1238 break; 1239 } while (--attempts); 1240 return stat; 1241} 1242 1243void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf) 1244{ 1245 struct cdrom_info *cd = drive->driver_data; 1246 u16 curspeed, maxspeed; 1247 1248 ide_debug_log(IDE_DBG_FUNC, "enter"); 1249 1250 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) { 1251 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]); 1252 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]); 1253 } else { 1254 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]); 1255 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]); 1256 } 1257 1258 ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u", 1259 curspeed, maxspeed); 1260 1261 cd->current_speed = (curspeed + (176/2)) / 176; 1262 cd->max_speed = (maxspeed + (176/2)) / 176; 1263} 1264 1265#define IDE_CD_CAPABILITIES \ 1266 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \ 1267 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \ 1268 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \ 1269 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \ 1270 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM) 1271 1272static struct cdrom_device_ops ide_cdrom_dops = { 1273 .open = ide_cdrom_open_real, 1274 .release = ide_cdrom_release_real, 1275 .drive_status = ide_cdrom_drive_status, 1276 .media_changed = ide_cdrom_check_media_change_real, 1277 .tray_move = ide_cdrom_tray_move, 1278 .lock_door = ide_cdrom_lock_door, 1279 .select_speed = ide_cdrom_select_speed, 1280 .get_last_session = ide_cdrom_get_last_session, 1281 .get_mcn = ide_cdrom_get_mcn, 1282 .reset = ide_cdrom_reset, 1283 .audio_ioctl = ide_cdrom_audio_ioctl, 1284 .capability = IDE_CD_CAPABILITIES, 1285 .generic_packet = ide_cdrom_packet, 1286}; 1287 1288static int ide_cdrom_register(ide_drive_t *drive, int nslots) 1289{ 1290 struct cdrom_info *info = drive->driver_data; 1291 struct cdrom_device_info *devinfo = &info->devinfo; 1292 1293 ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots); 1294 1295 devinfo->ops = &ide_cdrom_dops; 1296 devinfo->speed = info->current_speed; 1297 devinfo->capacity = nslots; 1298 devinfo->handle = drive; 1299 strcpy(devinfo->name, drive->name); 1300 1301 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT) 1302 devinfo->mask |= CDC_SELECT_SPEED; 1303 1304 devinfo->disk = info->disk; 1305 return register_cdrom(devinfo); 1306} 1307 1308static int ide_cdrom_probe_capabilities(ide_drive_t *drive) 1309{ 1310 struct cdrom_info *cd = drive->driver_data; 1311 struct cdrom_device_info *cdi = &cd->devinfo; 1312 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE]; 1313 mechtype_t mechtype; 1314 int nslots = 1; 1315 1316 ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx", 1317 drive->media, drive->atapi_flags); 1318 1319 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R | 1320 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO | 1321 CDC_MO_DRIVE | CDC_RAM); 1322 1323 if (drive->media == ide_optical) { 1324 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM); 1325 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n", 1326 drive->name); 1327 return nslots; 1328 } 1329 1330 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) { 1331 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT; 1332 cdi->mask &= ~CDC_PLAY_AUDIO; 1333 return nslots; 1334 } 1335 1336 /* 1337 * We have to cheat a little here. the packet will eventually be queued 1338 * with ide_cdrom_packet(), which extracts the drive from cdi->handle. 1339 * Since this device hasn't been registered with the Uniform layer yet, 1340 * it can't do this. Same goes for cdi->ops. 1341 */ 1342 cdi->handle = drive; 1343 cdi->ops = &ide_cdrom_dops; 1344 1345 if (ide_cdrom_get_capabilities(drive, buf)) 1346 return 0; 1347 1348 if ((buf[8 + 6] & 0x01) == 0) 1349 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING; 1350 if (buf[8 + 6] & 0x08) 1351 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT; 1352 if (buf[8 + 3] & 0x01) 1353 cdi->mask &= ~CDC_CD_R; 1354 if (buf[8 + 3] & 0x02) 1355 cdi->mask &= ~(CDC_CD_RW | CDC_RAM); 1356 if (buf[8 + 2] & 0x38) 1357 cdi->mask &= ~CDC_DVD; 1358 if (buf[8 + 3] & 0x20) 1359 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM); 1360 if (buf[8 + 3] & 0x10) 1361 cdi->mask &= ~CDC_DVD_R; 1362 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK)) 1363 cdi->mask &= ~CDC_PLAY_AUDIO; 1364 1365 mechtype = buf[8 + 6] >> 5; 1366 if (mechtype == mechtype_caddy || 1367 mechtype == mechtype_popup || 1368 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE)) 1369 cdi->mask |= CDC_CLOSE_TRAY; 1370 1371 if (cdi->sanyo_slot > 0) { 1372 cdi->mask &= ~CDC_SELECT_DISC; 1373 nslots = 3; 1374 } else if (mechtype == mechtype_individual_changer || 1375 mechtype == mechtype_cartridge_changer) { 1376 nslots = cdrom_number_of_slots(cdi); 1377 if (nslots > 1) 1378 cdi->mask &= ~CDC_SELECT_DISC; 1379 } 1380 1381 ide_cdrom_update_speed(drive, buf); 1382 1383 printk(KERN_INFO PFX "%s: ATAPI", drive->name); 1384 1385 /* don't print speed if the drive reported 0 */ 1386 if (cd->max_speed) 1387 printk(KERN_CONT " %dX", cd->max_speed); 1388 1389 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM"); 1390 1391 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0) 1392 printk(KERN_CONT " DVD%s%s", 1393 (cdi->mask & CDC_DVD_R) ? "" : "-R", 1394 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM"); 1395 1396 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0) 1397 printk(KERN_CONT " CD%s%s", 1398 (cdi->mask & CDC_CD_R) ? "" : "-R", 1399 (cdi->mask & CDC_CD_RW) ? "" : "/RW"); 1400 1401 if ((cdi->mask & CDC_SELECT_DISC) == 0) 1402 printk(KERN_CONT " changer w/%d slots", nslots); 1403 else 1404 printk(KERN_CONT " drive"); 1405 1406 printk(KERN_CONT ", %dkB Cache\n", 1407 be16_to_cpup((__be16 *)&buf[8 + 12])); 1408 1409 return nslots; 1410} 1411 1412/* standard prep_rq_fn that builds 10 byte cmds */ 1413static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq) 1414{ 1415 int hard_sect = queue_hardsect_size(q); 1416 long block = (long)rq->hard_sector / (hard_sect >> 9); 1417 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9); 1418 1419 memset(rq->cmd, 0, BLK_MAX_CDB); 1420 1421 if (rq_data_dir(rq) == READ) 1422 rq->cmd[0] = GPCMD_READ_10; 1423 else 1424 rq->cmd[0] = GPCMD_WRITE_10; 1425 1426 /* 1427 * fill in lba 1428 */ 1429 rq->cmd[2] = (block >> 24) & 0xff; 1430 rq->cmd[3] = (block >> 16) & 0xff; 1431 rq->cmd[4] = (block >> 8) & 0xff; 1432 rq->cmd[5] = block & 0xff; 1433 1434 /* 1435 * and transfer length 1436 */ 1437 rq->cmd[7] = (blocks >> 8) & 0xff; 1438 rq->cmd[8] = blocks & 0xff; 1439 rq->cmd_len = 10; 1440 return BLKPREP_OK; 1441} 1442 1443/* 1444 * Most of the SCSI commands are supported directly by ATAPI devices. 1445 * This transform handles the few exceptions. 1446 */ 1447static int ide_cdrom_prep_pc(struct request *rq) 1448{ 1449 u8 *c = rq->cmd; 1450 1451 /* transform 6-byte read/write commands to the 10-byte version */ 1452 if (c[0] == READ_6 || c[0] == WRITE_6) { 1453 c[8] = c[4]; 1454 c[5] = c[3]; 1455 c[4] = c[2]; 1456 c[3] = c[1] & 0x1f; 1457 c[2] = 0; 1458 c[1] &= 0xe0; 1459 c[0] += (READ_10 - READ_6); 1460 rq->cmd_len = 10; 1461 return BLKPREP_OK; 1462 } 1463 1464 /* 1465 * it's silly to pretend we understand 6-byte sense commands, just 1466 * reject with ILLEGAL_REQUEST and the caller should take the 1467 * appropriate action 1468 */ 1469 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) { 1470 rq->errors = ILLEGAL_REQUEST; 1471 return BLKPREP_KILL; 1472 } 1473 1474 return BLKPREP_OK; 1475} 1476 1477static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq) 1478{ 1479 if (blk_fs_request(rq)) 1480 return ide_cdrom_prep_fs(q, rq); 1481 else if (blk_pc_request(rq)) 1482 return ide_cdrom_prep_pc(rq); 1483 1484 return 0; 1485} 1486 1487struct cd_list_entry { 1488 const char *id_model; 1489 const char *id_firmware; 1490 unsigned int cd_flags; 1491}; 1492 1493#ifdef CONFIG_IDE_PROC_FS 1494static sector_t ide_cdrom_capacity(ide_drive_t *drive) 1495{ 1496 unsigned long capacity, sectors_per_frame; 1497 1498 if (cdrom_read_capacity(drive, &capacity, §ors_per_frame, NULL)) 1499 return 0; 1500 1501 return capacity * sectors_per_frame; 1502} 1503 1504static int proc_idecd_read_capacity(char *page, char **start, off_t off, 1505 int count, int *eof, void *data) 1506{ 1507 ide_drive_t *drive = data; 1508 int len; 1509 1510 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive)); 1511 PROC_IDE_READ_RETURN(page, start, off, count, eof, len); 1512} 1513 1514static ide_proc_entry_t idecd_proc[] = { 1515 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL }, 1516 { NULL, 0, NULL, NULL } 1517}; 1518 1519static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive) 1520{ 1521 return idecd_proc; 1522} 1523 1524static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive) 1525{ 1526 return NULL; 1527} 1528#endif 1529 1530static const struct cd_list_entry ide_cd_quirks_list[] = { 1531 /* SCR-3231 doesn't support the SET_CD_SPEED command. */ 1532 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT }, 1533 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */ 1534 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD | 1535 IDE_AFLAG_PRE_ATAPI12, }, 1536 /* Vertos 300, some versions of this drive like to talk BCD. */ 1537 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, }, 1538 /* Vertos 600 ESD. */ 1539 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, }, 1540 /* 1541 * Sanyo 3 CD changer uses a non-standard command for CD changing 1542 * (by default standard ATAPI support for CD changers is used). 1543 */ 1544 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD }, 1545 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD }, 1546 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD }, 1547 /* Stingray 8X CD-ROM. */ 1548 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 }, 1549 /* 1550 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length 1551 * mode sense page capabilities size, but older drives break. 1552 */ 1553 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE }, 1554 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE }, 1555 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */ 1556 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS }, 1557 /* 1558 * Some drives used by Apple don't advertise audio play 1559 * but they do support reading TOC & audio datas. 1560 */ 1561 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1562 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1563 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1564 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1565 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1566 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1567 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE }, 1568 { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE }, 1569 { NULL, NULL, 0 } 1570}; 1571 1572static unsigned int ide_cd_flags(u16 *id) 1573{ 1574 const struct cd_list_entry *cle = ide_cd_quirks_list; 1575 1576 while (cle->id_model) { 1577 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 && 1578 (cle->id_firmware == NULL || 1579 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware))) 1580 return cle->cd_flags; 1581 cle++; 1582 } 1583 1584 return 0; 1585} 1586 1587static int ide_cdrom_setup(ide_drive_t *drive) 1588{ 1589 struct cdrom_info *cd = drive->driver_data; 1590 struct cdrom_device_info *cdi = &cd->devinfo; 1591 struct request_queue *q = drive->queue; 1592 u16 *id = drive->id; 1593 char *fw_rev = (char *)&id[ATA_ID_FW_REV]; 1594 int nslots; 1595 1596 ide_debug_log(IDE_DBG_PROBE, "enter"); 1597 1598 blk_queue_prep_rq(q, ide_cdrom_prep_fn); 1599 blk_queue_dma_alignment(q, 31); 1600 blk_queue_update_dma_pad(q, 15); 1601 1602 q->unplug_delay = max((1 * HZ) / 1000, 1); 1603 1604 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED; 1605 drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id); 1606 1607 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) && 1608 fw_rev[4] == '1' && fw_rev[6] <= '2') 1609 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD | 1610 IDE_AFLAG_TOCADDR_AS_BCD); 1611 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) && 1612 fw_rev[4] == '1' && fw_rev[6] <= '2') 1613 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD; 1614 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD) 1615 /* 3 => use CD in slot 0 */ 1616 cdi->sanyo_slot = 3; 1617 1618 nslots = ide_cdrom_probe_capabilities(drive); 1619 1620 blk_queue_hardsect_size(q, CD_FRAMESIZE); 1621 1622 if (ide_cdrom_register(drive, nslots)) { 1623 printk(KERN_ERR PFX "%s: %s failed to register device with the" 1624 " cdrom driver.\n", drive->name, __func__); 1625 cd->devinfo.handle = NULL; 1626 return 1; 1627 } 1628 1629 ide_proc_register_driver(drive, cd->driver); 1630 return 0; 1631} 1632 1633static void ide_cd_remove(ide_drive_t *drive) 1634{ 1635 struct cdrom_info *info = drive->driver_data; 1636 1637 ide_debug_log(IDE_DBG_FUNC, "enter"); 1638 1639 ide_proc_unregister_driver(drive, info->driver); 1640 device_del(&info->dev); 1641 del_gendisk(info->disk); 1642 1643 mutex_lock(&idecd_ref_mutex); 1644 put_device(&info->dev); 1645 mutex_unlock(&idecd_ref_mutex); 1646} 1647 1648static void ide_cd_release(struct device *dev) 1649{ 1650 struct cdrom_info *info = to_ide_drv(dev, cdrom_info); 1651 struct cdrom_device_info *devinfo = &info->devinfo; 1652 ide_drive_t *drive = info->drive; 1653 struct gendisk *g = info->disk; 1654 1655 ide_debug_log(IDE_DBG_FUNC, "enter"); 1656 1657 kfree(info->toc); 1658 if (devinfo->handle == drive) 1659 unregister_cdrom(devinfo); 1660 drive->driver_data = NULL; 1661 blk_queue_prep_rq(drive->queue, NULL); 1662 g->private_data = NULL; 1663 put_disk(g); 1664 kfree(info); 1665} 1666 1667static int ide_cd_probe(ide_drive_t *); 1668 1669static struct ide_driver ide_cdrom_driver = { 1670 .gen_driver = { 1671 .owner = THIS_MODULE, 1672 .name = "ide-cdrom", 1673 .bus = &ide_bus_type, 1674 }, 1675 .probe = ide_cd_probe, 1676 .remove = ide_cd_remove, 1677 .version = IDECD_VERSION, 1678 .do_request = ide_cd_do_request, 1679#ifdef CONFIG_IDE_PROC_FS 1680 .proc_entries = ide_cd_proc_entries, 1681 .proc_devsets = ide_cd_proc_devsets, 1682#endif 1683}; 1684 1685static int idecd_open(struct block_device *bdev, fmode_t mode) 1686{ 1687 struct cdrom_info *info = ide_cd_get(bdev->bd_disk); 1688 int rc = -ENOMEM; 1689 1690 if (!info) 1691 return -ENXIO; 1692 1693 rc = cdrom_open(&info->devinfo, bdev, mode); 1694 1695 if (rc < 0) 1696 ide_cd_put(info); 1697 1698 return rc; 1699} 1700 1701static int idecd_release(struct gendisk *disk, fmode_t mode) 1702{ 1703 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 1704 1705 cdrom_release(&info->devinfo, mode); 1706 1707 ide_cd_put(info); 1708 1709 return 0; 1710} 1711 1712static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg) 1713{ 1714 struct packet_command cgc; 1715 char buffer[16]; 1716 int stat; 1717 char spindown; 1718 1719 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char))) 1720 return -EFAULT; 1721 1722 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN); 1723 1724 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0); 1725 if (stat) 1726 return stat; 1727 1728 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f); 1729 return cdrom_mode_select(cdi, &cgc); 1730} 1731 1732static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg) 1733{ 1734 struct packet_command cgc; 1735 char buffer[16]; 1736 int stat; 1737 char spindown; 1738 1739 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN); 1740 1741 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0); 1742 if (stat) 1743 return stat; 1744 1745 spindown = buffer[11] & 0x0f; 1746 if (copy_to_user((void __user *)arg, &spindown, sizeof(char))) 1747 return -EFAULT; 1748 return 0; 1749} 1750 1751static int idecd_ioctl(struct block_device *bdev, fmode_t mode, 1752 unsigned int cmd, unsigned long arg) 1753{ 1754 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info); 1755 int err; 1756 1757 switch (cmd) { 1758 case CDROMSETSPINDOWN: 1759 return idecd_set_spindown(&info->devinfo, arg); 1760 case CDROMGETSPINDOWN: 1761 return idecd_get_spindown(&info->devinfo, arg); 1762 default: 1763 break; 1764 } 1765 1766 err = generic_ide_ioctl(info->drive, bdev, cmd, arg); 1767 if (err == -EINVAL) 1768 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg); 1769 1770 return err; 1771} 1772 1773static int idecd_media_changed(struct gendisk *disk) 1774{ 1775 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 1776 return cdrom_media_changed(&info->devinfo); 1777} 1778 1779static int idecd_revalidate_disk(struct gendisk *disk) 1780{ 1781 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 1782 struct request_sense sense; 1783 1784 ide_cd_read_toc(info->drive, &sense); 1785 1786 return 0; 1787} 1788 1789static struct block_device_operations idecd_ops = { 1790 .owner = THIS_MODULE, 1791 .open = idecd_open, 1792 .release = idecd_release, 1793 .locked_ioctl = idecd_ioctl, 1794 .media_changed = idecd_media_changed, 1795 .revalidate_disk = idecd_revalidate_disk 1796}; 1797 1798/* module options */ 1799static unsigned long debug_mask; 1800module_param(debug_mask, ulong, 0644); 1801 1802MODULE_DESCRIPTION("ATAPI CD-ROM Driver"); 1803 1804static int ide_cd_probe(ide_drive_t *drive) 1805{ 1806 struct cdrom_info *info; 1807 struct gendisk *g; 1808 struct request_sense sense; 1809 1810 ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x", 1811 drive->driver_req, drive->media); 1812 1813 if (!strstr("ide-cdrom", drive->driver_req)) 1814 goto failed; 1815 1816 if (drive->media != ide_cdrom && drive->media != ide_optical) 1817 goto failed; 1818 1819 drive->debug_mask = debug_mask; 1820 drive->irq_handler = cdrom_newpc_intr; 1821 1822 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL); 1823 if (info == NULL) { 1824 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n", 1825 drive->name); 1826 goto failed; 1827 } 1828 1829 g = alloc_disk(1 << PARTN_BITS); 1830 if (!g) 1831 goto out_free_cd; 1832 1833 ide_init_disk(g, drive); 1834 1835 info->dev.parent = &drive->gendev; 1836 info->dev.release = ide_cd_release; 1837 dev_set_name(&info->dev, dev_name(&drive->gendev)); 1838 1839 if (device_register(&info->dev)) 1840 goto out_free_disk; 1841 1842 info->drive = drive; 1843 info->driver = &ide_cdrom_driver; 1844 info->disk = g; 1845 1846 g->private_data = &info->driver; 1847 1848 drive->driver_data = info; 1849 1850 g->minors = 1; 1851 g->driverfs_dev = &drive->gendev; 1852 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE; 1853 if (ide_cdrom_setup(drive)) { 1854 put_device(&info->dev); 1855 goto failed; 1856 } 1857 1858 ide_cd_read_toc(drive, &sense); 1859 g->fops = &idecd_ops; 1860 g->flags |= GENHD_FL_REMOVABLE; 1861 add_disk(g); 1862 return 0; 1863 1864out_free_disk: 1865 put_disk(g); 1866out_free_cd: 1867 kfree(info); 1868failed: 1869 return -ENODEV; 1870} 1871 1872static void __exit ide_cdrom_exit(void) 1873{ 1874 driver_unregister(&ide_cdrom_driver.gen_driver); 1875} 1876 1877static int __init ide_cdrom_init(void) 1878{ 1879 printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n"); 1880 return driver_register(&ide_cdrom_driver.gen_driver); 1881} 1882 1883MODULE_ALIAS("ide:*m-cdrom*"); 1884MODULE_ALIAS("ide-cd"); 1885module_init(ide_cdrom_init); 1886module_exit(ide_cdrom_exit); 1887MODULE_LICENSE("GPL"); 1888