ide-cd.c revision e01f251fd09fa7cb3d352eac7de17bb5d5bd1f9d
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 u8 quiet = rq->cmd_flags & REQ_QUIET; 316 317 /* get the IDE error register */ 318 err = ide_read_error(drive); 319 sense_key = err >> 4; 320 321 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, rq->cmd_type: 0x%x, err: 0x%x, " 322 "stat 0x%x", 323 rq->cmd[0], rq->cmd_type, err, stat); 324 325 if (blk_sense_request(rq)) { 326 /* 327 * We got an error trying to get sense info from the drive 328 * (probably while trying to recover from a former error). 329 * Just give up. 330 */ 331 rq->cmd_flags |= REQ_FAILED; 332 return 2; 333 } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) { 334 /* All other functions, except for READ. */ 335 336 /* 337 * if we have an error, pass back CHECK_CONDITION as the 338 * scsi status byte 339 */ 340 if (blk_pc_request(rq) && !rq->errors) 341 rq->errors = SAM_STAT_CHECK_CONDITION; 342 343 switch (sense_key) { 344 case NOT_READY: 345 cdrom_saw_media_change(drive); 346 break; 347 case UNIT_ATTENTION: 348 cdrom_saw_media_change(drive); 349 return 0; 350 case ILLEGAL_REQUEST: 351 /* 352 * Don't print error message for this condition-- 353 * SFF8090i indicates that 5/24/00 is the correct 354 * response to a request to close the tray if the 355 * drive doesn't have that capability. 356 * cdrom_log_sense() knows this! 357 */ 358 if (rq->cmd[0] == GPCMD_START_STOP_UNIT) 359 break; 360 /* fall-through */ 361 default: 362 if (!quiet) 363 ide_dump_status(drive, "packet command error", 364 stat); 365 } 366 367 rq->cmd_flags |= REQ_FAILED; 368 369 /* 370 * instead of playing games with moving completions around, 371 * remove failed request completely and end it when the 372 * request sense has completed 373 */ 374 goto end_request; 375 376 } else if (blk_fs_request(rq)) { 377 int do_end_request = 0; 378 379 /* handle errors from READ and WRITE requests */ 380 381 if (blk_noretry_request(rq)) 382 do_end_request = 1; 383 384 switch (sense_key) { 385 case NOT_READY: 386 if (rq_data_dir(rq) == READ) { 387 cdrom_saw_media_change(drive); 388 389 if (!quiet) 390 printk(KERN_ERR PFX "%s: tray open\n", 391 drive->name); 392 } else { 393 if (ide_cd_breathe(drive, rq)) 394 return 1; 395 } 396 do_end_request = 1; 397 break; 398 case UNIT_ATTENTION: 399 cdrom_saw_media_change(drive); 400 401 /* 402 * Arrange to retry the request but be sure to give up 403 * if we've retried too many times. 404 */ 405 if (++rq->errors > ERROR_MAX) 406 do_end_request = 1; 407 break; 408 case ILLEGAL_REQUEST: 409 case DATA_PROTECT: 410 /* 411 * No point in retrying after an illegal request or data 412 * protect error. 413 */ 414 if (!quiet) 415 ide_dump_status(drive, "command error", stat); 416 do_end_request = 1; 417 break; 418 case MEDIUM_ERROR: 419 /* 420 * No point in re-trying a zillion times on a bad 421 * sector. If we got here the error is not correctable. 422 */ 423 if (!quiet) 424 ide_dump_status(drive, "media error " 425 "(bad sector)", stat); 426 do_end_request = 1; 427 break; 428 case BLANK_CHECK: 429 /* disk appears blank ?? */ 430 if (!quiet) 431 ide_dump_status(drive, "media error (blank)", 432 stat); 433 do_end_request = 1; 434 break; 435 default: 436 if (err & ~ATA_ABORTED) { 437 /* go to the default handler for other errors */ 438 ide_error(drive, "cdrom_decode_status", stat); 439 return 1; 440 } else if (++rq->errors > ERROR_MAX) 441 /* we've racked up too many retries, abort */ 442 do_end_request = 1; 443 } 444 445 /* 446 * End a request through request sense analysis when we have 447 * sense data. We need this in order to perform end of media 448 * processing. 449 */ 450 if (do_end_request) 451 goto end_request; 452 453 /* 454 * If we got a CHECK_CONDITION status, queue 455 * a request sense command. 456 */ 457 if (stat & ATA_ERR) 458 cdrom_queue_request_sense(drive, NULL, NULL); 459 return 1; 460 } else { 461 blk_dump_rq_flags(rq, PFX "bad rq"); 462 return 2; 463 } 464 465end_request: 466 if (stat & ATA_ERR) { 467 struct request_queue *q = drive->queue; 468 unsigned long flags; 469 470 spin_lock_irqsave(q->queue_lock, flags); 471 blkdev_dequeue_request(rq); 472 spin_unlock_irqrestore(q->queue_lock, flags); 473 474 hwif->rq = NULL; 475 476 cdrom_queue_request_sense(drive, rq->sense, rq); 477 return 1; 478 } else 479 return 2; 480} 481 482/* 483 * Check the contents of the interrupt reason register from the cdrom 484 * and attempt to recover if there are problems. Returns 0 if everything's 485 * ok; nonzero if the request has been terminated. 486 */ 487static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq, 488 int len, int ireason, int rw) 489{ 490 ide_hwif_t *hwif = drive->hwif; 491 492 ide_debug_log(IDE_DBG_FUNC, "ireason: 0x%x, rw: 0x%x", ireason, rw); 493 494 /* 495 * ireason == 0: the drive wants to receive data from us 496 * ireason == 2: the drive is expecting to transfer data to us 497 */ 498 if (ireason == (!rw << 1)) 499 return 0; 500 else if (ireason == (rw << 1)) { 501 502 /* whoops... */ 503 printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n", 504 drive->name, __func__); 505 506 ide_pad_transfer(drive, rw, len); 507 } else if (rw == 0 && ireason == 1) { 508 /* 509 * Some drives (ASUS) seem to tell us that status info is 510 * available. Just get it and ignore. 511 */ 512 (void)hwif->tp_ops->read_status(hwif); 513 return 0; 514 } else { 515 /* drive wants a command packet, or invalid ireason... */ 516 printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n", 517 drive->name, __func__, ireason); 518 } 519 520 if (rq->cmd_type == REQ_TYPE_ATA_PC) 521 rq->cmd_flags |= REQ_FAILED; 522 523 return -1; 524} 525 526static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct ide_cmd *cmd) 527{ 528 struct request *rq = cmd->rq; 529 530 ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]); 531 532 /* 533 * Some of the trailing request sense fields are optional, 534 * and some drives don't send them. Sigh. 535 */ 536 if (rq->cmd[0] == GPCMD_REQUEST_SENSE && 537 cmd->nleft > 0 && cmd->nleft <= 5) { 538 unsigned int ofs = cmd->nbytes - cmd->nleft; 539 540 while (cmd->nleft > 0) { 541 *((u8 *)rq->data + ofs++) = 0; 542 cmd->nleft--; 543 } 544 } 545} 546 547int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd, 548 int write, void *buffer, unsigned *bufflen, 549 struct request_sense *sense, int timeout, 550 unsigned int cmd_flags) 551{ 552 struct cdrom_info *info = drive->driver_data; 553 struct request_sense local_sense; 554 int retries = 10; 555 unsigned int flags = 0; 556 557 if (!sense) 558 sense = &local_sense; 559 560 ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, " 561 "cmd_flags: 0x%x", 562 cmd[0], write, timeout, cmd_flags); 563 564 /* start of retry loop */ 565 do { 566 struct request *rq; 567 int error; 568 569 rq = blk_get_request(drive->queue, write, __GFP_WAIT); 570 571 memcpy(rq->cmd, cmd, BLK_MAX_CDB); 572 rq->cmd_type = REQ_TYPE_ATA_PC; 573 rq->sense = sense; 574 rq->cmd_flags |= cmd_flags; 575 rq->timeout = timeout; 576 if (buffer) { 577 rq->data = buffer; 578 rq->data_len = *bufflen; 579 } 580 581 error = blk_execute_rq(drive->queue, info->disk, rq, 0); 582 583 if (buffer) 584 *bufflen = rq->data_len; 585 586 flags = rq->cmd_flags; 587 blk_put_request(rq); 588 589 /* 590 * FIXME: we should probably abort/retry or something in case of 591 * failure. 592 */ 593 if (flags & REQ_FAILED) { 594 /* 595 * The request failed. Retry if it was due to a unit 596 * attention status (usually means media was changed). 597 */ 598 struct request_sense *reqbuf = sense; 599 600 if (reqbuf->sense_key == UNIT_ATTENTION) 601 cdrom_saw_media_change(drive); 602 else if (reqbuf->sense_key == NOT_READY && 603 reqbuf->asc == 4 && reqbuf->ascq != 4) { 604 /* 605 * The drive is in the process of loading 606 * a disk. Retry, but wait a little to give 607 * the drive time to complete the load. 608 */ 609 ssleep(2); 610 } else { 611 /* otherwise, don't retry */ 612 retries = 0; 613 } 614 --retries; 615 } 616 617 /* end of retry loop */ 618 } while ((flags & REQ_FAILED) && retries >= 0); 619 620 /* return an error if the command failed */ 621 return (flags & REQ_FAILED) ? -EIO : 0; 622} 623 624static void ide_cd_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd) 625{ 626 unsigned int nr_bytes = cmd->nbytes - cmd->nleft; 627 628 if (cmd->tf_flags & IDE_TFLAG_WRITE) 629 nr_bytes -= cmd->last_xfer_len; 630 631 if (nr_bytes > 0) 632 ide_complete_rq(drive, 0, nr_bytes); 633} 634 635static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive) 636{ 637 ide_hwif_t *hwif = drive->hwif; 638 struct ide_cmd *cmd = &hwif->cmd; 639 struct request *rq = hwif->rq; 640 ide_expiry_t *expiry = NULL; 641 int dma_error = 0, dma, thislen, uptodate = 0; 642 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc, nsectors; 643 int sense = blk_sense_request(rq); 644 unsigned int timeout; 645 u16 len; 646 u8 ireason, stat; 647 648 ide_debug_log(IDE_DBG_PC, "cmd: 0x%x, write: 0x%x", rq->cmd[0], write); 649 650 /* check for errors */ 651 dma = drive->dma; 652 if (dma) { 653 drive->dma = 0; 654 drive->waiting_for_dma = 0; 655 dma_error = hwif->dma_ops->dma_end(drive); 656 ide_dma_unmap_sg(drive, cmd); 657 if (dma_error) { 658 printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name, 659 write ? "write" : "read"); 660 ide_dma_off(drive); 661 } 662 } 663 664 /* check status */ 665 stat = hwif->tp_ops->read_status(hwif); 666 667 if (!OK_STAT(stat, 0, BAD_R_STAT)) { 668 rc = cdrom_decode_status(drive, stat); 669 if (rc) { 670 if (rc == 2) 671 goto out_end; 672 return ide_stopped; 673 } 674 } 675 676 /* using dma, transfer is complete now */ 677 if (dma) { 678 if (dma_error) 679 return ide_error(drive, "dma error", stat); 680 uptodate = 1; 681 goto out_end; 682 } 683 684 ide_read_bcount_and_ireason(drive, &len, &ireason); 685 686 thislen = blk_fs_request(rq) ? len : cmd->nleft; 687 if (thislen > len) 688 thislen = len; 689 690 ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d", 691 stat, thislen); 692 693 /* If DRQ is clear, the command has completed. */ 694 if ((stat & ATA_DRQ) == 0) { 695 if (blk_fs_request(rq)) { 696 /* 697 * If we're not done reading/writing, complain. 698 * Otherwise, complete the command normally. 699 */ 700 uptodate = 1; 701 if (cmd->nleft > 0) { 702 printk(KERN_ERR PFX "%s: %s: data underrun " 703 "(%u bytes)\n", drive->name, __func__, 704 cmd->nleft); 705 if (!write) 706 rq->cmd_flags |= REQ_FAILED; 707 uptodate = 0; 708 } 709 } else if (!blk_pc_request(rq)) { 710 ide_cd_request_sense_fixup(drive, cmd); 711 /* complain if we still have data left to transfer */ 712 uptodate = cmd->nleft ? 0 : 1; 713 if (uptodate == 0) 714 rq->cmd_flags |= REQ_FAILED; 715 } 716 goto out_end; 717 } 718 719 /* check which way to transfer data */ 720 rc = ide_cd_check_ireason(drive, rq, len, ireason, write); 721 if (rc) 722 goto out_end; 723 724 cmd->last_xfer_len = 0; 725 726 ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, " 727 "ireason: 0x%x", 728 rq->cmd_type, ireason); 729 730 /* transfer data */ 731 while (thislen > 0) { 732 int blen = min_t(int, thislen, cmd->nleft); 733 734 if (cmd->nleft == 0) 735 break; 736 737 ide_pio_bytes(drive, cmd, write, blen); 738 cmd->last_xfer_len += blen; 739 740 thislen -= blen; 741 len -= blen; 742 743 if (sense && write == 0) 744 rq->sense_len += blen; 745 } 746 747 /* pad, if necessary */ 748 if (len > 0) { 749 if (blk_fs_request(rq) == 0 || write == 0) 750 ide_pad_transfer(drive, write, len); 751 else { 752 printk(KERN_ERR PFX "%s: confused, missing data\n", 753 drive->name); 754 blk_dump_rq_flags(rq, "cdrom_newpc_intr"); 755 } 756 } 757 758 if (blk_pc_request(rq)) { 759 timeout = rq->timeout; 760 } else { 761 timeout = ATAPI_WAIT_PC; 762 if (!blk_fs_request(rq)) 763 expiry = ide_cd_expiry; 764 } 765 766 hwif->expiry = expiry; 767 ide_set_handler(drive, cdrom_newpc_intr, timeout); 768 return ide_started; 769 770out_end: 771 if (blk_pc_request(rq) && rc == 0) { 772 unsigned int dlen = rq->data_len; 773 774 rq->data_len = 0; 775 776 if (blk_end_request(rq, 0, dlen)) 777 BUG(); 778 779 hwif->rq = NULL; 780 } else { 781 if (sense && uptodate) 782 ide_cd_complete_failed_rq(drive, rq); 783 784 if (blk_fs_request(rq)) { 785 if (cmd->nleft == 0) 786 uptodate = 1; 787 } else { 788 if (uptodate <= 0 && rq->errors == 0) 789 rq->errors = -EIO; 790 } 791 792 if (uptodate == 0) 793 ide_cd_error_cmd(drive, cmd); 794 795 /* make sure it's fully ended */ 796 if (blk_pc_request(rq)) 797 nsectors = (rq->data_len + 511) >> 9; 798 else 799 nsectors = rq->hard_nr_sectors; 800 801 if (nsectors == 0) 802 nsectors = 1; 803 804 if (blk_fs_request(rq) == 0) { 805 rq->data_len -= (cmd->nbytes - cmd->nleft); 806 if (uptodate == 0 && (cmd->tf_flags & IDE_TFLAG_WRITE)) 807 rq->data_len += cmd->last_xfer_len; 808 } 809 810 ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9); 811 812 if (sense && rc == 2) 813 ide_error(drive, "request sense failure", stat); 814 } 815 return ide_stopped; 816} 817 818static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq) 819{ 820 struct cdrom_info *cd = drive->driver_data; 821 struct request_queue *q = drive->queue; 822 int write = rq_data_dir(rq) == WRITE; 823 unsigned short sectors_per_frame = 824 queue_hardsect_size(q) >> SECTOR_BITS; 825 826 ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, rq->cmd_flags: 0x%x, " 827 "secs_per_frame: %u", 828 rq->cmd[0], rq->cmd_flags, sectors_per_frame); 829 830 if (write) { 831 /* disk has become write protected */ 832 if (get_disk_ro(cd->disk)) 833 return ide_stopped; 834 } else { 835 /* 836 * We may be retrying this request after an error. Fix up any 837 * weirdness which might be present in the request packet. 838 */ 839 q->prep_rq_fn(q, rq); 840 } 841 842 /* fs requests *must* be hardware frame aligned */ 843 if ((rq->nr_sectors & (sectors_per_frame - 1)) || 844 (rq->sector & (sectors_per_frame - 1))) 845 return ide_stopped; 846 847 /* use DMA, if possible */ 848 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA); 849 850 if (write) 851 cd->devinfo.media_written = 1; 852 853 rq->timeout = ATAPI_WAIT_PC; 854 855 return ide_started; 856} 857 858static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq) 859{ 860 861 ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x", 862 rq->cmd[0], rq->cmd_type); 863 864 if (blk_pc_request(rq)) 865 rq->cmd_flags |= REQ_QUIET; 866 else 867 rq->cmd_flags &= ~REQ_FAILED; 868 869 drive->dma = 0; 870 871 /* sg request */ 872 if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) { 873 struct request_queue *q = drive->queue; 874 unsigned int alignment; 875 char *buf; 876 877 if (rq->bio) 878 buf = bio_data(rq->bio); 879 else 880 buf = rq->data; 881 882 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA); 883 884 /* 885 * check if dma is safe 886 * 887 * NOTE! The "len" and "addr" checks should possibly have 888 * separate masks. 889 */ 890 alignment = queue_dma_alignment(q) | q->dma_pad_mask; 891 if ((unsigned long)buf & alignment 892 || rq->data_len & q->dma_pad_mask 893 || object_is_on_stack(buf)) 894 drive->dma = 0; 895 } 896} 897 898static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq, 899 sector_t block) 900{ 901 struct ide_cmd cmd; 902 int uptodate = 0, nsectors; 903 904 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu", 905 rq->cmd[0], (unsigned long long)block); 906 907 if (drive->debug_mask & IDE_DBG_RQ) 908 blk_dump_rq_flags(rq, "ide_cd_do_request"); 909 910 if (blk_fs_request(rq)) { 911 if (cdrom_start_rw(drive, rq) == ide_stopped) 912 goto out_end; 913 } else if (blk_sense_request(rq) || blk_pc_request(rq) || 914 rq->cmd_type == REQ_TYPE_ATA_PC) { 915 if (!rq->timeout) 916 rq->timeout = ATAPI_WAIT_PC; 917 918 cdrom_do_block_pc(drive, rq); 919 } else if (blk_special_request(rq)) { 920 /* right now this can only be a reset... */ 921 uptodate = 1; 922 goto out_end; 923 } else { 924 blk_dump_rq_flags(rq, DRV_NAME " bad flags"); 925 if (rq->errors == 0) 926 rq->errors = -EIO; 927 goto out_end; 928 } 929 930 memset(&cmd, 0, sizeof(cmd)); 931 932 if (rq_data_dir(rq)) 933 cmd.tf_flags |= IDE_TFLAG_WRITE; 934 935 cmd.rq = rq; 936 937 if (blk_fs_request(rq) || rq->data_len) { 938 ide_init_sg_cmd(&cmd, blk_fs_request(rq) ? (rq->nr_sectors << 9) 939 : rq->data_len); 940 ide_map_sg(drive, &cmd); 941 } 942 943 return ide_issue_pc(drive, &cmd); 944out_end: 945 nsectors = rq->hard_nr_sectors; 946 947 if (nsectors == 0) 948 nsectors = 1; 949 950 ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9); 951 952 return ide_stopped; 953} 954 955/* 956 * Ioctl handling. 957 * 958 * Routines which queue packet commands take as a final argument a pointer to a 959 * request_sense struct. If execution of the command results in an error with a 960 * CHECK CONDITION status, this structure will be filled with the results of the 961 * subsequent request sense command. The pointer can also be NULL, in which case 962 * no sense information is returned. 963 */ 964static void msf_from_bcd(struct atapi_msf *msf) 965{ 966 msf->minute = bcd2bin(msf->minute); 967 msf->second = bcd2bin(msf->second); 968 msf->frame = bcd2bin(msf->frame); 969} 970 971int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense) 972{ 973 struct cdrom_info *info = drive->driver_data; 974 struct cdrom_device_info *cdi = &info->devinfo; 975 unsigned char cmd[BLK_MAX_CDB]; 976 977 ide_debug_log(IDE_DBG_FUNC, "enter"); 978 979 memset(cmd, 0, BLK_MAX_CDB); 980 cmd[0] = GPCMD_TEST_UNIT_READY; 981 982 /* 983 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs 984 * instead of supporting the LOAD_UNLOAD opcode. 985 */ 986 cmd[7] = cdi->sanyo_slot % 3; 987 988 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET); 989} 990 991static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity, 992 unsigned long *sectors_per_frame, 993 struct request_sense *sense) 994{ 995 struct { 996 __be32 lba; 997 __be32 blocklen; 998 } capbuf; 999 1000 int stat; 1001 unsigned char cmd[BLK_MAX_CDB]; 1002 unsigned len = sizeof(capbuf); 1003 u32 blocklen; 1004 1005 ide_debug_log(IDE_DBG_FUNC, "enter"); 1006 1007 memset(cmd, 0, BLK_MAX_CDB); 1008 cmd[0] = GPCMD_READ_CDVD_CAPACITY; 1009 1010 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0, 1011 REQ_QUIET); 1012 if (stat) 1013 return stat; 1014 1015 /* 1016 * Sanity check the given block size 1017 */ 1018 blocklen = be32_to_cpu(capbuf.blocklen); 1019 switch (blocklen) { 1020 case 512: 1021 case 1024: 1022 case 2048: 1023 case 4096: 1024 break; 1025 default: 1026 printk(KERN_ERR PFX "%s: weird block size %u\n", 1027 drive->name, blocklen); 1028 printk(KERN_ERR PFX "%s: default to 2kb block size\n", 1029 drive->name); 1030 blocklen = 2048; 1031 break; 1032 } 1033 1034 *capacity = 1 + be32_to_cpu(capbuf.lba); 1035 *sectors_per_frame = blocklen >> SECTOR_BITS; 1036 1037 ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu", 1038 *capacity, *sectors_per_frame); 1039 1040 return 0; 1041} 1042 1043static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag, 1044 int format, char *buf, int buflen, 1045 struct request_sense *sense) 1046{ 1047 unsigned char cmd[BLK_MAX_CDB]; 1048 1049 ide_debug_log(IDE_DBG_FUNC, "enter"); 1050 1051 memset(cmd, 0, BLK_MAX_CDB); 1052 1053 cmd[0] = GPCMD_READ_TOC_PMA_ATIP; 1054 cmd[6] = trackno; 1055 cmd[7] = (buflen >> 8); 1056 cmd[8] = (buflen & 0xff); 1057 cmd[9] = (format << 6); 1058 1059 if (msf_flag) 1060 cmd[1] = 2; 1061 1062 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET); 1063} 1064 1065/* Try to read the entire TOC for the disk into our internal buffer. */ 1066int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense) 1067{ 1068 int stat, ntracks, i; 1069 struct cdrom_info *info = drive->driver_data; 1070 struct cdrom_device_info *cdi = &info->devinfo; 1071 struct atapi_toc *toc = info->toc; 1072 struct { 1073 struct atapi_toc_header hdr; 1074 struct atapi_toc_entry ent; 1075 } ms_tmp; 1076 long last_written; 1077 unsigned long sectors_per_frame = SECTORS_PER_FRAME; 1078 1079 ide_debug_log(IDE_DBG_FUNC, "enter"); 1080 1081 if (toc == NULL) { 1082 /* try to allocate space */ 1083 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL); 1084 if (toc == NULL) { 1085 printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n", 1086 drive->name); 1087 return -ENOMEM; 1088 } 1089 info->toc = toc; 1090 } 1091 1092 /* 1093 * Check to see if the existing data is still valid. If it is, 1094 * just return. 1095 */ 1096 (void) cdrom_check_status(drive, sense); 1097 1098 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID) 1099 return 0; 1100 1101 /* try to get the total cdrom capacity and sector size */ 1102 stat = cdrom_read_capacity(drive, &toc->capacity, §ors_per_frame, 1103 sense); 1104 if (stat) 1105 toc->capacity = 0x1fffff; 1106 1107 set_capacity(info->disk, toc->capacity * sectors_per_frame); 1108 /* save a private copy of the TOC capacity for error handling */ 1109 drive->probed_capacity = toc->capacity * sectors_per_frame; 1110 1111 blk_queue_hardsect_size(drive->queue, 1112 sectors_per_frame << SECTOR_BITS); 1113 1114 /* first read just the header, so we know how long the TOC is */ 1115 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr, 1116 sizeof(struct atapi_toc_header), sense); 1117 if (stat) 1118 return stat; 1119 1120 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1121 toc->hdr.first_track = bcd2bin(toc->hdr.first_track); 1122 toc->hdr.last_track = bcd2bin(toc->hdr.last_track); 1123 } 1124 1125 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1; 1126 if (ntracks <= 0) 1127 return -EIO; 1128 if (ntracks > MAX_TRACKS) 1129 ntracks = MAX_TRACKS; 1130 1131 /* now read the whole schmeer */ 1132 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0, 1133 (char *)&toc->hdr, 1134 sizeof(struct atapi_toc_header) + 1135 (ntracks + 1) * 1136 sizeof(struct atapi_toc_entry), sense); 1137 1138 if (stat && toc->hdr.first_track > 1) { 1139 /* 1140 * Cds with CDI tracks only don't have any TOC entries, despite 1141 * of this the returned values are 1142 * first_track == last_track = number of CDI tracks + 1, 1143 * so that this case is indistinguishable from the same layout 1144 * plus an additional audio track. If we get an error for the 1145 * regular case, we assume a CDI without additional audio 1146 * tracks. In this case the readable TOC is empty (CDI tracks 1147 * are not included) and only holds the Leadout entry. 1148 * 1149 * Heiko Eißfeldt. 1150 */ 1151 ntracks = 0; 1152 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0, 1153 (char *)&toc->hdr, 1154 sizeof(struct atapi_toc_header) + 1155 (ntracks + 1) * 1156 sizeof(struct atapi_toc_entry), 1157 sense); 1158 if (stat) 1159 return stat; 1160 1161 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1162 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT); 1163 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT); 1164 } else { 1165 toc->hdr.first_track = CDROM_LEADOUT; 1166 toc->hdr.last_track = CDROM_LEADOUT; 1167 } 1168 } 1169 1170 if (stat) 1171 return stat; 1172 1173 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length); 1174 1175 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1176 toc->hdr.first_track = bcd2bin(toc->hdr.first_track); 1177 toc->hdr.last_track = bcd2bin(toc->hdr.last_track); 1178 } 1179 1180 for (i = 0; i <= ntracks; i++) { 1181 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) { 1182 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) 1183 toc->ent[i].track = bcd2bin(toc->ent[i].track); 1184 msf_from_bcd(&toc->ent[i].addr.msf); 1185 } 1186 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute, 1187 toc->ent[i].addr.msf.second, 1188 toc->ent[i].addr.msf.frame); 1189 } 1190 1191 if (toc->hdr.first_track != CDROM_LEADOUT) { 1192 /* read the multisession information */ 1193 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp, 1194 sizeof(ms_tmp), sense); 1195 if (stat) 1196 return stat; 1197 1198 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba); 1199 } else { 1200 ms_tmp.hdr.last_track = CDROM_LEADOUT; 1201 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track; 1202 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */ 1203 } 1204 1205 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) { 1206 /* re-read multisession information using MSF format */ 1207 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp, 1208 sizeof(ms_tmp), sense); 1209 if (stat) 1210 return stat; 1211 1212 msf_from_bcd(&ms_tmp.ent.addr.msf); 1213 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute, 1214 ms_tmp.ent.addr.msf.second, 1215 ms_tmp.ent.addr.msf.frame); 1216 } 1217 1218 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track); 1219 1220 /* now try to get the total cdrom capacity */ 1221 stat = cdrom_get_last_written(cdi, &last_written); 1222 if (!stat && (last_written > toc->capacity)) { 1223 toc->capacity = last_written; 1224 set_capacity(info->disk, toc->capacity * sectors_per_frame); 1225 drive->probed_capacity = toc->capacity * sectors_per_frame; 1226 } 1227 1228 /* Remember that we've read this stuff. */ 1229 drive->atapi_flags |= IDE_AFLAG_TOC_VALID; 1230 1231 return 0; 1232} 1233 1234int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf) 1235{ 1236 struct cdrom_info *info = drive->driver_data; 1237 struct cdrom_device_info *cdi = &info->devinfo; 1238 struct packet_command cgc; 1239 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE; 1240 1241 ide_debug_log(IDE_DBG_FUNC, "enter"); 1242 1243 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0) 1244 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE; 1245 1246 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN); 1247 do { 1248 /* we seem to get stat=0x01,err=0x00 the first time (??) */ 1249 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0); 1250 if (!stat) 1251 break; 1252 } while (--attempts); 1253 return stat; 1254} 1255 1256void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf) 1257{ 1258 struct cdrom_info *cd = drive->driver_data; 1259 u16 curspeed, maxspeed; 1260 1261 ide_debug_log(IDE_DBG_FUNC, "enter"); 1262 1263 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) { 1264 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]); 1265 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]); 1266 } else { 1267 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]); 1268 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]); 1269 } 1270 1271 ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u", 1272 curspeed, maxspeed); 1273 1274 cd->current_speed = (curspeed + (176/2)) / 176; 1275 cd->max_speed = (maxspeed + (176/2)) / 176; 1276} 1277 1278#define IDE_CD_CAPABILITIES \ 1279 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \ 1280 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \ 1281 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \ 1282 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \ 1283 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM) 1284 1285static struct cdrom_device_ops ide_cdrom_dops = { 1286 .open = ide_cdrom_open_real, 1287 .release = ide_cdrom_release_real, 1288 .drive_status = ide_cdrom_drive_status, 1289 .media_changed = ide_cdrom_check_media_change_real, 1290 .tray_move = ide_cdrom_tray_move, 1291 .lock_door = ide_cdrom_lock_door, 1292 .select_speed = ide_cdrom_select_speed, 1293 .get_last_session = ide_cdrom_get_last_session, 1294 .get_mcn = ide_cdrom_get_mcn, 1295 .reset = ide_cdrom_reset, 1296 .audio_ioctl = ide_cdrom_audio_ioctl, 1297 .capability = IDE_CD_CAPABILITIES, 1298 .generic_packet = ide_cdrom_packet, 1299}; 1300 1301static int ide_cdrom_register(ide_drive_t *drive, int nslots) 1302{ 1303 struct cdrom_info *info = drive->driver_data; 1304 struct cdrom_device_info *devinfo = &info->devinfo; 1305 1306 ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots); 1307 1308 devinfo->ops = &ide_cdrom_dops; 1309 devinfo->speed = info->current_speed; 1310 devinfo->capacity = nslots; 1311 devinfo->handle = drive; 1312 strcpy(devinfo->name, drive->name); 1313 1314 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT) 1315 devinfo->mask |= CDC_SELECT_SPEED; 1316 1317 devinfo->disk = info->disk; 1318 return register_cdrom(devinfo); 1319} 1320 1321static int ide_cdrom_probe_capabilities(ide_drive_t *drive) 1322{ 1323 struct cdrom_info *cd = drive->driver_data; 1324 struct cdrom_device_info *cdi = &cd->devinfo; 1325 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE]; 1326 mechtype_t mechtype; 1327 int nslots = 1; 1328 1329 ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx", 1330 drive->media, drive->atapi_flags); 1331 1332 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R | 1333 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO | 1334 CDC_MO_DRIVE | CDC_RAM); 1335 1336 if (drive->media == ide_optical) { 1337 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM); 1338 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n", 1339 drive->name); 1340 return nslots; 1341 } 1342 1343 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) { 1344 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT; 1345 cdi->mask &= ~CDC_PLAY_AUDIO; 1346 return nslots; 1347 } 1348 1349 /* 1350 * We have to cheat a little here. the packet will eventually be queued 1351 * with ide_cdrom_packet(), which extracts the drive from cdi->handle. 1352 * Since this device hasn't been registered with the Uniform layer yet, 1353 * it can't do this. Same goes for cdi->ops. 1354 */ 1355 cdi->handle = drive; 1356 cdi->ops = &ide_cdrom_dops; 1357 1358 if (ide_cdrom_get_capabilities(drive, buf)) 1359 return 0; 1360 1361 if ((buf[8 + 6] & 0x01) == 0) 1362 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING; 1363 if (buf[8 + 6] & 0x08) 1364 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT; 1365 if (buf[8 + 3] & 0x01) 1366 cdi->mask &= ~CDC_CD_R; 1367 if (buf[8 + 3] & 0x02) 1368 cdi->mask &= ~(CDC_CD_RW | CDC_RAM); 1369 if (buf[8 + 2] & 0x38) 1370 cdi->mask &= ~CDC_DVD; 1371 if (buf[8 + 3] & 0x20) 1372 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM); 1373 if (buf[8 + 3] & 0x10) 1374 cdi->mask &= ~CDC_DVD_R; 1375 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK)) 1376 cdi->mask &= ~CDC_PLAY_AUDIO; 1377 1378 mechtype = buf[8 + 6] >> 5; 1379 if (mechtype == mechtype_caddy || 1380 mechtype == mechtype_popup || 1381 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE)) 1382 cdi->mask |= CDC_CLOSE_TRAY; 1383 1384 if (cdi->sanyo_slot > 0) { 1385 cdi->mask &= ~CDC_SELECT_DISC; 1386 nslots = 3; 1387 } else if (mechtype == mechtype_individual_changer || 1388 mechtype == mechtype_cartridge_changer) { 1389 nslots = cdrom_number_of_slots(cdi); 1390 if (nslots > 1) 1391 cdi->mask &= ~CDC_SELECT_DISC; 1392 } 1393 1394 ide_cdrom_update_speed(drive, buf); 1395 1396 printk(KERN_INFO PFX "%s: ATAPI", drive->name); 1397 1398 /* don't print speed if the drive reported 0 */ 1399 if (cd->max_speed) 1400 printk(KERN_CONT " %dX", cd->max_speed); 1401 1402 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM"); 1403 1404 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0) 1405 printk(KERN_CONT " DVD%s%s", 1406 (cdi->mask & CDC_DVD_R) ? "" : "-R", 1407 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM"); 1408 1409 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0) 1410 printk(KERN_CONT " CD%s%s", 1411 (cdi->mask & CDC_CD_R) ? "" : "-R", 1412 (cdi->mask & CDC_CD_RW) ? "" : "/RW"); 1413 1414 if ((cdi->mask & CDC_SELECT_DISC) == 0) 1415 printk(KERN_CONT " changer w/%d slots", nslots); 1416 else 1417 printk(KERN_CONT " drive"); 1418 1419 printk(KERN_CONT ", %dkB Cache\n", 1420 be16_to_cpup((__be16 *)&buf[8 + 12])); 1421 1422 return nslots; 1423} 1424 1425/* standard prep_rq_fn that builds 10 byte cmds */ 1426static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq) 1427{ 1428 int hard_sect = queue_hardsect_size(q); 1429 long block = (long)rq->hard_sector / (hard_sect >> 9); 1430 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9); 1431 1432 memset(rq->cmd, 0, BLK_MAX_CDB); 1433 1434 if (rq_data_dir(rq) == READ) 1435 rq->cmd[0] = GPCMD_READ_10; 1436 else 1437 rq->cmd[0] = GPCMD_WRITE_10; 1438 1439 /* 1440 * fill in lba 1441 */ 1442 rq->cmd[2] = (block >> 24) & 0xff; 1443 rq->cmd[3] = (block >> 16) & 0xff; 1444 rq->cmd[4] = (block >> 8) & 0xff; 1445 rq->cmd[5] = block & 0xff; 1446 1447 /* 1448 * and transfer length 1449 */ 1450 rq->cmd[7] = (blocks >> 8) & 0xff; 1451 rq->cmd[8] = blocks & 0xff; 1452 rq->cmd_len = 10; 1453 return BLKPREP_OK; 1454} 1455 1456/* 1457 * Most of the SCSI commands are supported directly by ATAPI devices. 1458 * This transform handles the few exceptions. 1459 */ 1460static int ide_cdrom_prep_pc(struct request *rq) 1461{ 1462 u8 *c = rq->cmd; 1463 1464 /* transform 6-byte read/write commands to the 10-byte version */ 1465 if (c[0] == READ_6 || c[0] == WRITE_6) { 1466 c[8] = c[4]; 1467 c[5] = c[3]; 1468 c[4] = c[2]; 1469 c[3] = c[1] & 0x1f; 1470 c[2] = 0; 1471 c[1] &= 0xe0; 1472 c[0] += (READ_10 - READ_6); 1473 rq->cmd_len = 10; 1474 return BLKPREP_OK; 1475 } 1476 1477 /* 1478 * it's silly to pretend we understand 6-byte sense commands, just 1479 * reject with ILLEGAL_REQUEST and the caller should take the 1480 * appropriate action 1481 */ 1482 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) { 1483 rq->errors = ILLEGAL_REQUEST; 1484 return BLKPREP_KILL; 1485 } 1486 1487 return BLKPREP_OK; 1488} 1489 1490static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq) 1491{ 1492 if (blk_fs_request(rq)) 1493 return ide_cdrom_prep_fs(q, rq); 1494 else if (blk_pc_request(rq)) 1495 return ide_cdrom_prep_pc(rq); 1496 1497 return 0; 1498} 1499 1500struct cd_list_entry { 1501 const char *id_model; 1502 const char *id_firmware; 1503 unsigned int cd_flags; 1504}; 1505 1506#ifdef CONFIG_IDE_PROC_FS 1507static sector_t ide_cdrom_capacity(ide_drive_t *drive) 1508{ 1509 unsigned long capacity, sectors_per_frame; 1510 1511 if (cdrom_read_capacity(drive, &capacity, §ors_per_frame, NULL)) 1512 return 0; 1513 1514 return capacity * sectors_per_frame; 1515} 1516 1517static int proc_idecd_read_capacity(char *page, char **start, off_t off, 1518 int count, int *eof, void *data) 1519{ 1520 ide_drive_t *drive = data; 1521 int len; 1522 1523 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive)); 1524 PROC_IDE_READ_RETURN(page, start, off, count, eof, len); 1525} 1526 1527static ide_proc_entry_t idecd_proc[] = { 1528 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL }, 1529 { NULL, 0, NULL, NULL } 1530}; 1531 1532static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive) 1533{ 1534 return idecd_proc; 1535} 1536 1537static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive) 1538{ 1539 return NULL; 1540} 1541#endif 1542 1543static const struct cd_list_entry ide_cd_quirks_list[] = { 1544 /* SCR-3231 doesn't support the SET_CD_SPEED command. */ 1545 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT }, 1546 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */ 1547 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD | 1548 IDE_AFLAG_PRE_ATAPI12, }, 1549 /* Vertos 300, some versions of this drive like to talk BCD. */ 1550 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, }, 1551 /* Vertos 600 ESD. */ 1552 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, }, 1553 /* 1554 * Sanyo 3 CD changer uses a non-standard command for CD changing 1555 * (by default standard ATAPI support for CD changers is used). 1556 */ 1557 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD }, 1558 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD }, 1559 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD }, 1560 /* Stingray 8X CD-ROM. */ 1561 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 }, 1562 /* 1563 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length 1564 * mode sense page capabilities size, but older drives break. 1565 */ 1566 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE }, 1567 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE }, 1568 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */ 1569 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS }, 1570 /* 1571 * Some drives used by Apple don't advertise audio play 1572 * but they do support reading TOC & audio datas. 1573 */ 1574 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1575 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1576 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1577 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1578 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1579 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1580 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE }, 1581 { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE }, 1582 { NULL, NULL, 0 } 1583}; 1584 1585static unsigned int ide_cd_flags(u16 *id) 1586{ 1587 const struct cd_list_entry *cle = ide_cd_quirks_list; 1588 1589 while (cle->id_model) { 1590 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 && 1591 (cle->id_firmware == NULL || 1592 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware))) 1593 return cle->cd_flags; 1594 cle++; 1595 } 1596 1597 return 0; 1598} 1599 1600static int ide_cdrom_setup(ide_drive_t *drive) 1601{ 1602 struct cdrom_info *cd = drive->driver_data; 1603 struct cdrom_device_info *cdi = &cd->devinfo; 1604 struct request_queue *q = drive->queue; 1605 u16 *id = drive->id; 1606 char *fw_rev = (char *)&id[ATA_ID_FW_REV]; 1607 int nslots; 1608 1609 ide_debug_log(IDE_DBG_PROBE, "enter"); 1610 1611 blk_queue_prep_rq(q, ide_cdrom_prep_fn); 1612 blk_queue_dma_alignment(q, 31); 1613 blk_queue_update_dma_pad(q, 15); 1614 1615 q->unplug_delay = max((1 * HZ) / 1000, 1); 1616 1617 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED; 1618 drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id); 1619 1620 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) && 1621 fw_rev[4] == '1' && fw_rev[6] <= '2') 1622 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD | 1623 IDE_AFLAG_TOCADDR_AS_BCD); 1624 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) && 1625 fw_rev[4] == '1' && fw_rev[6] <= '2') 1626 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD; 1627 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD) 1628 /* 3 => use CD in slot 0 */ 1629 cdi->sanyo_slot = 3; 1630 1631 nslots = ide_cdrom_probe_capabilities(drive); 1632 1633 blk_queue_hardsect_size(q, CD_FRAMESIZE); 1634 1635 if (ide_cdrom_register(drive, nslots)) { 1636 printk(KERN_ERR PFX "%s: %s failed to register device with the" 1637 " cdrom driver.\n", drive->name, __func__); 1638 cd->devinfo.handle = NULL; 1639 return 1; 1640 } 1641 1642 ide_proc_register_driver(drive, cd->driver); 1643 return 0; 1644} 1645 1646static void ide_cd_remove(ide_drive_t *drive) 1647{ 1648 struct cdrom_info *info = drive->driver_data; 1649 1650 ide_debug_log(IDE_DBG_FUNC, "enter"); 1651 1652 ide_proc_unregister_driver(drive, info->driver); 1653 device_del(&info->dev); 1654 del_gendisk(info->disk); 1655 1656 mutex_lock(&idecd_ref_mutex); 1657 put_device(&info->dev); 1658 mutex_unlock(&idecd_ref_mutex); 1659} 1660 1661static void ide_cd_release(struct device *dev) 1662{ 1663 struct cdrom_info *info = to_ide_drv(dev, cdrom_info); 1664 struct cdrom_device_info *devinfo = &info->devinfo; 1665 ide_drive_t *drive = info->drive; 1666 struct gendisk *g = info->disk; 1667 1668 ide_debug_log(IDE_DBG_FUNC, "enter"); 1669 1670 kfree(info->toc); 1671 if (devinfo->handle == drive) 1672 unregister_cdrom(devinfo); 1673 drive->driver_data = NULL; 1674 blk_queue_prep_rq(drive->queue, NULL); 1675 g->private_data = NULL; 1676 put_disk(g); 1677 kfree(info); 1678} 1679 1680static int ide_cd_probe(ide_drive_t *); 1681 1682static struct ide_driver ide_cdrom_driver = { 1683 .gen_driver = { 1684 .owner = THIS_MODULE, 1685 .name = "ide-cdrom", 1686 .bus = &ide_bus_type, 1687 }, 1688 .probe = ide_cd_probe, 1689 .remove = ide_cd_remove, 1690 .version = IDECD_VERSION, 1691 .do_request = ide_cd_do_request, 1692#ifdef CONFIG_IDE_PROC_FS 1693 .proc_entries = ide_cd_proc_entries, 1694 .proc_devsets = ide_cd_proc_devsets, 1695#endif 1696}; 1697 1698static int idecd_open(struct block_device *bdev, fmode_t mode) 1699{ 1700 struct cdrom_info *info = ide_cd_get(bdev->bd_disk); 1701 int rc = -ENOMEM; 1702 1703 if (!info) 1704 return -ENXIO; 1705 1706 rc = cdrom_open(&info->devinfo, bdev, mode); 1707 1708 if (rc < 0) 1709 ide_cd_put(info); 1710 1711 return rc; 1712} 1713 1714static int idecd_release(struct gendisk *disk, fmode_t mode) 1715{ 1716 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 1717 1718 cdrom_release(&info->devinfo, mode); 1719 1720 ide_cd_put(info); 1721 1722 return 0; 1723} 1724 1725static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg) 1726{ 1727 struct packet_command cgc; 1728 char buffer[16]; 1729 int stat; 1730 char spindown; 1731 1732 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char))) 1733 return -EFAULT; 1734 1735 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN); 1736 1737 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0); 1738 if (stat) 1739 return stat; 1740 1741 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f); 1742 return cdrom_mode_select(cdi, &cgc); 1743} 1744 1745static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg) 1746{ 1747 struct packet_command cgc; 1748 char buffer[16]; 1749 int stat; 1750 char spindown; 1751 1752 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN); 1753 1754 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0); 1755 if (stat) 1756 return stat; 1757 1758 spindown = buffer[11] & 0x0f; 1759 if (copy_to_user((void __user *)arg, &spindown, sizeof(char))) 1760 return -EFAULT; 1761 return 0; 1762} 1763 1764static int idecd_ioctl(struct block_device *bdev, fmode_t mode, 1765 unsigned int cmd, unsigned long arg) 1766{ 1767 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info); 1768 int err; 1769 1770 switch (cmd) { 1771 case CDROMSETSPINDOWN: 1772 return idecd_set_spindown(&info->devinfo, arg); 1773 case CDROMGETSPINDOWN: 1774 return idecd_get_spindown(&info->devinfo, arg); 1775 default: 1776 break; 1777 } 1778 1779 err = generic_ide_ioctl(info->drive, bdev, cmd, arg); 1780 if (err == -EINVAL) 1781 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg); 1782 1783 return err; 1784} 1785 1786static int idecd_media_changed(struct gendisk *disk) 1787{ 1788 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 1789 return cdrom_media_changed(&info->devinfo); 1790} 1791 1792static int idecd_revalidate_disk(struct gendisk *disk) 1793{ 1794 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 1795 struct request_sense sense; 1796 1797 ide_cd_read_toc(info->drive, &sense); 1798 1799 return 0; 1800} 1801 1802static struct block_device_operations idecd_ops = { 1803 .owner = THIS_MODULE, 1804 .open = idecd_open, 1805 .release = idecd_release, 1806 .locked_ioctl = idecd_ioctl, 1807 .media_changed = idecd_media_changed, 1808 .revalidate_disk = idecd_revalidate_disk 1809}; 1810 1811/* module options */ 1812static unsigned long debug_mask; 1813module_param(debug_mask, ulong, 0644); 1814 1815MODULE_DESCRIPTION("ATAPI CD-ROM Driver"); 1816 1817static int ide_cd_probe(ide_drive_t *drive) 1818{ 1819 struct cdrom_info *info; 1820 struct gendisk *g; 1821 struct request_sense sense; 1822 1823 ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x", 1824 drive->driver_req, drive->media); 1825 1826 if (!strstr("ide-cdrom", drive->driver_req)) 1827 goto failed; 1828 1829 if (drive->media != ide_cdrom && drive->media != ide_optical) 1830 goto failed; 1831 1832 drive->debug_mask = debug_mask; 1833 drive->irq_handler = cdrom_newpc_intr; 1834 1835 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL); 1836 if (info == NULL) { 1837 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n", 1838 drive->name); 1839 goto failed; 1840 } 1841 1842 g = alloc_disk(1 << PARTN_BITS); 1843 if (!g) 1844 goto out_free_cd; 1845 1846 ide_init_disk(g, drive); 1847 1848 info->dev.parent = &drive->gendev; 1849 info->dev.release = ide_cd_release; 1850 dev_set_name(&info->dev, dev_name(&drive->gendev)); 1851 1852 if (device_register(&info->dev)) 1853 goto out_free_disk; 1854 1855 info->drive = drive; 1856 info->driver = &ide_cdrom_driver; 1857 info->disk = g; 1858 1859 g->private_data = &info->driver; 1860 1861 drive->driver_data = info; 1862 1863 g->minors = 1; 1864 g->driverfs_dev = &drive->gendev; 1865 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE; 1866 if (ide_cdrom_setup(drive)) { 1867 put_device(&info->dev); 1868 goto failed; 1869 } 1870 1871 ide_cd_read_toc(drive, &sense); 1872 g->fops = &idecd_ops; 1873 g->flags |= GENHD_FL_REMOVABLE; 1874 add_disk(g); 1875 return 0; 1876 1877out_free_disk: 1878 put_disk(g); 1879out_free_cd: 1880 kfree(info); 1881failed: 1882 return -ENODEV; 1883} 1884 1885static void __exit ide_cdrom_exit(void) 1886{ 1887 driver_unregister(&ide_cdrom_driver.gen_driver); 1888} 1889 1890static int __init ide_cdrom_init(void) 1891{ 1892 printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n"); 1893 return driver_register(&ide_cdrom_driver.gen_driver); 1894} 1895 1896MODULE_ALIAS("ide:*m-cdrom*"); 1897MODULE_ALIAS("ide-cd"); 1898module_init(ide_cdrom_init); 1899module_exit(ide_cdrom_exit); 1900MODULE_LICENSE("GPL"); 1901