ide-cd.c revision 02e7cf8f848841ca21864ccd019e480b73c323b7
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 ide_cd_complete_failed_rq(ide_drive_t *drive, struct request *rq) 210{ 211 /* 212 * For REQ_TYPE_SENSE, "rq->special" points to the original 213 * failed request. Also, the sense data should be read 214 * directly from rq which might be different from the original 215 * sense buffer if it got copied during mapping. 216 */ 217 struct request *failed = (struct request *)rq->special; 218 void *sense = bio_data(rq->bio); 219 220 if (failed) { 221 if (failed->sense) { 222 /* 223 * Sense is always read into drive->sense_data. 224 * Copy back if the failed request has its 225 * sense pointer set. 226 */ 227 memcpy(failed->sense, sense, 18); 228 sense = failed->sense; 229 failed->sense_len = rq->sense_len; 230 } 231 cdrom_analyze_sense_data(drive, failed, sense); 232 233 if (ide_end_rq(drive, failed, -EIO, blk_rq_bytes(failed))) 234 BUG(); 235 } else 236 cdrom_analyze_sense_data(drive, NULL, sense); 237} 238 239 240/* 241 * Allow the drive 5 seconds to recover; some devices will return NOT_READY 242 * while flushing data from cache. 243 * 244 * returns: 0 failed (write timeout expired) 245 * 1 success 246 */ 247static int ide_cd_breathe(ide_drive_t *drive, struct request *rq) 248{ 249 250 struct cdrom_info *info = drive->driver_data; 251 252 if (!rq->errors) 253 info->write_timeout = jiffies + ATAPI_WAIT_WRITE_BUSY; 254 255 rq->errors = 1; 256 257 if (time_after(jiffies, info->write_timeout)) 258 return 0; 259 else { 260 struct request_queue *q = drive->queue; 261 unsigned long flags; 262 263 /* 264 * take a breather relying on the unplug timer to kick us again 265 */ 266 267 spin_lock_irqsave(q->queue_lock, flags); 268 blk_plug_device(q); 269 spin_unlock_irqrestore(q->queue_lock, flags); 270 271 return 1; 272 } 273} 274 275/** 276 * Returns: 277 * 0: if the request should be continued. 278 * 1: if the request will be going through error recovery. 279 * 2: if the request should be ended. 280 */ 281static int cdrom_decode_status(ide_drive_t *drive, u8 stat) 282{ 283 ide_hwif_t *hwif = drive->hwif; 284 struct request *rq = hwif->rq; 285 int err, sense_key, do_end_request = 0; 286 u8 quiet = rq->cmd_flags & REQ_QUIET; 287 288 /* get the IDE error register */ 289 err = ide_read_error(drive); 290 sense_key = err >> 4; 291 292 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, rq->cmd_type: 0x%x, err: 0x%x, " 293 "stat 0x%x", 294 rq->cmd[0], rq->cmd_type, err, stat); 295 296 if (blk_sense_request(rq)) { 297 /* 298 * We got an error trying to get sense info from the drive 299 * (probably while trying to recover from a former error). 300 * Just give up. 301 */ 302 rq->cmd_flags |= REQ_FAILED; 303 return 2; 304 } 305 306 /* if we have an error, pass CHECK_CONDITION as the SCSI status byte */ 307 if (blk_pc_request(rq) && !rq->errors) 308 rq->errors = SAM_STAT_CHECK_CONDITION; 309 310 if (blk_noretry_request(rq)) 311 do_end_request = 1; 312 313 switch (sense_key) { 314 case NOT_READY: 315 if (blk_fs_request(rq) && rq_data_dir(rq) == WRITE) { 316 if (ide_cd_breathe(drive, rq)) 317 return 1; 318 } else { 319 cdrom_saw_media_change(drive); 320 321 if (blk_fs_request(rq) && !quiet) 322 printk(KERN_ERR PFX "%s: tray open\n", 323 drive->name); 324 } 325 do_end_request = 1; 326 break; 327 case UNIT_ATTENTION: 328 cdrom_saw_media_change(drive); 329 330 if (blk_fs_request(rq) == 0) 331 return 0; 332 333 /* 334 * Arrange to retry the request but be sure to give up if we've 335 * retried too many times. 336 */ 337 if (++rq->errors > ERROR_MAX) 338 do_end_request = 1; 339 break; 340 case ILLEGAL_REQUEST: 341 /* 342 * Don't print error message for this condition -- SFF8090i 343 * indicates that 5/24/00 is the correct response to a request 344 * to close the tray if the drive doesn't have that capability. 345 * 346 * cdrom_log_sense() knows this! 347 */ 348 if (rq->cmd[0] == GPCMD_START_STOP_UNIT) 349 break; 350 /* fall-through */ 351 case DATA_PROTECT: 352 /* 353 * No point in retrying after an illegal request or data 354 * protect error. 355 */ 356 if (!quiet) 357 ide_dump_status(drive, "command error", stat); 358 do_end_request = 1; 359 break; 360 case MEDIUM_ERROR: 361 /* 362 * No point in re-trying a zillion times on a bad sector. 363 * If we got here the error is not correctable. 364 */ 365 if (!quiet) 366 ide_dump_status(drive, "media error " 367 "(bad sector)", stat); 368 do_end_request = 1; 369 break; 370 case BLANK_CHECK: 371 /* disk appears blank? */ 372 if (!quiet) 373 ide_dump_status(drive, "media error (blank)", 374 stat); 375 do_end_request = 1; 376 break; 377 default: 378 if (blk_fs_request(rq) == 0) 379 break; 380 if (err & ~ATA_ABORTED) { 381 /* go to the default handler for other errors */ 382 ide_error(drive, "cdrom_decode_status", stat); 383 return 1; 384 } else if (++rq->errors > ERROR_MAX) 385 /* we've racked up too many retries, abort */ 386 do_end_request = 1; 387 } 388 389 if (blk_fs_request(rq) == 0) { 390 rq->cmd_flags |= REQ_FAILED; 391 do_end_request = 1; 392 } 393 394 /* 395 * End a request through request sense analysis when we have sense data. 396 * We need this in order to perform end of media processing. 397 */ 398 if (do_end_request) 399 goto end_request; 400 401 /* if we got a CHECK_CONDITION status, queue a request sense command */ 402 if (stat & ATA_ERR) 403 return ide_queue_sense_rq(drive, NULL) ? 2 : 1; 404 return 1; 405 406end_request: 407 if (stat & ATA_ERR) { 408 struct request_queue *q = drive->queue; 409 unsigned long flags; 410 411 spin_lock_irqsave(q->queue_lock, flags); 412 blkdev_dequeue_request(rq); 413 spin_unlock_irqrestore(q->queue_lock, flags); 414 415 hwif->rq = NULL; 416 417 return ide_queue_sense_rq(drive, rq) ? 2 : 1; 418 } else 419 return 2; 420} 421 422/* 423 * Check the contents of the interrupt reason register from the cdrom 424 * and attempt to recover if there are problems. Returns 0 if everything's 425 * ok; nonzero if the request has been terminated. 426 */ 427static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq, 428 int len, int ireason, int rw) 429{ 430 ide_hwif_t *hwif = drive->hwif; 431 432 ide_debug_log(IDE_DBG_FUNC, "ireason: 0x%x, rw: 0x%x", ireason, rw); 433 434 /* 435 * ireason == 0: the drive wants to receive data from us 436 * ireason == 2: the drive is expecting to transfer data to us 437 */ 438 if (ireason == (!rw << 1)) 439 return 0; 440 else if (ireason == (rw << 1)) { 441 442 /* whoops... */ 443 printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n", 444 drive->name, __func__); 445 446 ide_pad_transfer(drive, rw, len); 447 } else if (rw == 0 && ireason == 1) { 448 /* 449 * Some drives (ASUS) seem to tell us that status info is 450 * available. Just get it and ignore. 451 */ 452 (void)hwif->tp_ops->read_status(hwif); 453 return 0; 454 } else { 455 /* drive wants a command packet, or invalid ireason... */ 456 printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n", 457 drive->name, __func__, ireason); 458 } 459 460 if (rq->cmd_type == REQ_TYPE_ATA_PC) 461 rq->cmd_flags |= REQ_FAILED; 462 463 return -1; 464} 465 466static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct ide_cmd *cmd) 467{ 468 struct request *rq = cmd->rq; 469 470 ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]); 471 472 /* 473 * Some of the trailing request sense fields are optional, 474 * and some drives don't send them. Sigh. 475 */ 476 if (rq->cmd[0] == GPCMD_REQUEST_SENSE && 477 cmd->nleft > 0 && cmd->nleft <= 5) 478 cmd->nleft = 0; 479} 480 481int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd, 482 int write, void *buffer, unsigned *bufflen, 483 struct request_sense *sense, int timeout, 484 unsigned int cmd_flags) 485{ 486 struct cdrom_info *info = drive->driver_data; 487 struct request_sense local_sense; 488 int retries = 10; 489 unsigned int flags = 0; 490 491 if (!sense) 492 sense = &local_sense; 493 494 ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, " 495 "cmd_flags: 0x%x", 496 cmd[0], write, timeout, cmd_flags); 497 498 /* start of retry loop */ 499 do { 500 struct request *rq; 501 int error; 502 503 rq = blk_get_request(drive->queue, write, __GFP_WAIT); 504 505 memcpy(rq->cmd, cmd, BLK_MAX_CDB); 506 rq->cmd_type = REQ_TYPE_ATA_PC; 507 rq->sense = sense; 508 rq->cmd_flags |= cmd_flags; 509 rq->timeout = timeout; 510 if (buffer) { 511 error = blk_rq_map_kern(drive->queue, rq, buffer, 512 *bufflen, GFP_NOIO); 513 if (error) { 514 blk_put_request(rq); 515 return error; 516 } 517 } 518 519 error = blk_execute_rq(drive->queue, info->disk, rq, 0); 520 521 if (buffer) 522 *bufflen = rq->data_len; 523 524 flags = rq->cmd_flags; 525 blk_put_request(rq); 526 527 /* 528 * FIXME: we should probably abort/retry or something in case of 529 * failure. 530 */ 531 if (flags & REQ_FAILED) { 532 /* 533 * The request failed. Retry if it was due to a unit 534 * attention status (usually means media was changed). 535 */ 536 struct request_sense *reqbuf = sense; 537 538 if (reqbuf->sense_key == UNIT_ATTENTION) 539 cdrom_saw_media_change(drive); 540 else if (reqbuf->sense_key == NOT_READY && 541 reqbuf->asc == 4 && reqbuf->ascq != 4) { 542 /* 543 * The drive is in the process of loading 544 * a disk. Retry, but wait a little to give 545 * the drive time to complete the load. 546 */ 547 ssleep(2); 548 } else { 549 /* otherwise, don't retry */ 550 retries = 0; 551 } 552 --retries; 553 } 554 555 /* end of retry loop */ 556 } while ((flags & REQ_FAILED) && retries >= 0); 557 558 /* return an error if the command failed */ 559 return (flags & REQ_FAILED) ? -EIO : 0; 560} 561 562static void ide_cd_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd) 563{ 564 unsigned int nr_bytes = cmd->nbytes - cmd->nleft; 565 566 if (cmd->tf_flags & IDE_TFLAG_WRITE) 567 nr_bytes -= cmd->last_xfer_len; 568 569 if (nr_bytes > 0) 570 ide_complete_rq(drive, 0, nr_bytes); 571} 572 573static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive) 574{ 575 ide_hwif_t *hwif = drive->hwif; 576 struct ide_cmd *cmd = &hwif->cmd; 577 struct request *rq = hwif->rq; 578 ide_expiry_t *expiry = NULL; 579 int dma_error = 0, dma, thislen, uptodate = 0; 580 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc = 0, nsectors; 581 int sense = blk_sense_request(rq); 582 unsigned int timeout; 583 u16 len; 584 u8 ireason, stat; 585 586 ide_debug_log(IDE_DBG_PC, "cmd: 0x%x, write: 0x%x", rq->cmd[0], write); 587 588 /* check for errors */ 589 dma = drive->dma; 590 if (dma) { 591 drive->dma = 0; 592 drive->waiting_for_dma = 0; 593 dma_error = hwif->dma_ops->dma_end(drive); 594 ide_dma_unmap_sg(drive, cmd); 595 if (dma_error) { 596 printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name, 597 write ? "write" : "read"); 598 ide_dma_off(drive); 599 } 600 } 601 602 /* check status */ 603 stat = hwif->tp_ops->read_status(hwif); 604 605 if (!OK_STAT(stat, 0, BAD_R_STAT)) { 606 rc = cdrom_decode_status(drive, stat); 607 if (rc) { 608 if (rc == 2) 609 goto out_end; 610 return ide_stopped; 611 } 612 } 613 614 /* using dma, transfer is complete now */ 615 if (dma) { 616 if (dma_error) 617 return ide_error(drive, "dma error", stat); 618 uptodate = 1; 619 goto out_end; 620 } 621 622 ide_read_bcount_and_ireason(drive, &len, &ireason); 623 624 thislen = blk_fs_request(rq) ? len : cmd->nleft; 625 if (thislen > len) 626 thislen = len; 627 628 ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d", 629 stat, thislen); 630 631 /* If DRQ is clear, the command has completed. */ 632 if ((stat & ATA_DRQ) == 0) { 633 if (blk_fs_request(rq)) { 634 /* 635 * If we're not done reading/writing, complain. 636 * Otherwise, complete the command normally. 637 */ 638 uptodate = 1; 639 if (cmd->nleft > 0) { 640 printk(KERN_ERR PFX "%s: %s: data underrun " 641 "(%u bytes)\n", drive->name, __func__, 642 cmd->nleft); 643 if (!write) 644 rq->cmd_flags |= REQ_FAILED; 645 uptodate = 0; 646 } 647 } else if (!blk_pc_request(rq)) { 648 ide_cd_request_sense_fixup(drive, cmd); 649 /* complain if we still have data left to transfer */ 650 uptodate = cmd->nleft ? 0 : 1; 651 if (uptodate == 0) 652 rq->cmd_flags |= REQ_FAILED; 653 } 654 goto out_end; 655 } 656 657 /* check which way to transfer data */ 658 rc = ide_cd_check_ireason(drive, rq, len, ireason, write); 659 if (rc) 660 goto out_end; 661 662 cmd->last_xfer_len = 0; 663 664 ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, " 665 "ireason: 0x%x", 666 rq->cmd_type, ireason); 667 668 /* transfer data */ 669 while (thislen > 0) { 670 int blen = min_t(int, thislen, cmd->nleft); 671 672 if (cmd->nleft == 0) 673 break; 674 675 ide_pio_bytes(drive, cmd, write, blen); 676 cmd->last_xfer_len += blen; 677 678 thislen -= blen; 679 len -= blen; 680 681 if (sense && write == 0) 682 rq->sense_len += blen; 683 } 684 685 /* pad, if necessary */ 686 if (len > 0) { 687 if (blk_fs_request(rq) == 0 || write == 0) 688 ide_pad_transfer(drive, write, len); 689 else { 690 printk(KERN_ERR PFX "%s: confused, missing data\n", 691 drive->name); 692 blk_dump_rq_flags(rq, "cdrom_newpc_intr"); 693 } 694 } 695 696 if (blk_pc_request(rq)) { 697 timeout = rq->timeout; 698 } else { 699 timeout = ATAPI_WAIT_PC; 700 if (!blk_fs_request(rq)) 701 expiry = ide_cd_expiry; 702 } 703 704 hwif->expiry = expiry; 705 ide_set_handler(drive, cdrom_newpc_intr, timeout); 706 return ide_started; 707 708out_end: 709 if (blk_pc_request(rq) && rc == 0) { 710 unsigned int dlen = rq->data_len; 711 712 rq->data_len = 0; 713 714 if (blk_end_request(rq, 0, dlen)) 715 BUG(); 716 717 hwif->rq = NULL; 718 } else { 719 if (sense && uptodate) 720 ide_cd_complete_failed_rq(drive, rq); 721 722 if (blk_fs_request(rq)) { 723 if (cmd->nleft == 0) 724 uptodate = 1; 725 } else { 726 if (uptodate <= 0 && rq->errors == 0) 727 rq->errors = -EIO; 728 } 729 730 if (uptodate == 0) 731 ide_cd_error_cmd(drive, cmd); 732 733 /* make sure it's fully ended */ 734 if (blk_pc_request(rq)) 735 nsectors = (rq->data_len + 511) >> 9; 736 else 737 nsectors = rq->hard_nr_sectors; 738 739 if (nsectors == 0) 740 nsectors = 1; 741 742 if (blk_fs_request(rq) == 0) { 743 rq->data_len -= (cmd->nbytes - cmd->nleft); 744 if (uptodate == 0 && (cmd->tf_flags & IDE_TFLAG_WRITE)) 745 rq->data_len += cmd->last_xfer_len; 746 } 747 748 ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9); 749 750 if (sense && rc == 2) 751 ide_error(drive, "request sense failure", stat); 752 } 753 return ide_stopped; 754} 755 756static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq) 757{ 758 struct cdrom_info *cd = drive->driver_data; 759 struct request_queue *q = drive->queue; 760 int write = rq_data_dir(rq) == WRITE; 761 unsigned short sectors_per_frame = 762 queue_hardsect_size(q) >> SECTOR_BITS; 763 764 ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, rq->cmd_flags: 0x%x, " 765 "secs_per_frame: %u", 766 rq->cmd[0], rq->cmd_flags, sectors_per_frame); 767 768 if (write) { 769 /* disk has become write protected */ 770 if (get_disk_ro(cd->disk)) 771 return ide_stopped; 772 } else { 773 /* 774 * We may be retrying this request after an error. Fix up any 775 * weirdness which might be present in the request packet. 776 */ 777 q->prep_rq_fn(q, rq); 778 } 779 780 /* fs requests *must* be hardware frame aligned */ 781 if ((rq->nr_sectors & (sectors_per_frame - 1)) || 782 (rq->sector & (sectors_per_frame - 1))) 783 return ide_stopped; 784 785 /* use DMA, if possible */ 786 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA); 787 788 if (write) 789 cd->devinfo.media_written = 1; 790 791 rq->timeout = ATAPI_WAIT_PC; 792 793 return ide_started; 794} 795 796static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq) 797{ 798 799 ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x", 800 rq->cmd[0], rq->cmd_type); 801 802 if (blk_pc_request(rq)) 803 rq->cmd_flags |= REQ_QUIET; 804 else 805 rq->cmd_flags &= ~REQ_FAILED; 806 807 drive->dma = 0; 808 809 /* sg request */ 810 if (rq->bio) { 811 struct request_queue *q = drive->queue; 812 char *buf = bio_data(rq->bio); 813 unsigned int alignment; 814 815 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA); 816 817 /* 818 * check if dma is safe 819 * 820 * NOTE! The "len" and "addr" checks should possibly have 821 * separate masks. 822 */ 823 alignment = queue_dma_alignment(q) | q->dma_pad_mask; 824 if ((unsigned long)buf & alignment 825 || rq->data_len & q->dma_pad_mask 826 || object_is_on_stack(buf)) 827 drive->dma = 0; 828 } 829} 830 831static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq, 832 sector_t block) 833{ 834 struct ide_cmd cmd; 835 int uptodate = 0, nsectors; 836 837 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu", 838 rq->cmd[0], (unsigned long long)block); 839 840 if (drive->debug_mask & IDE_DBG_RQ) 841 blk_dump_rq_flags(rq, "ide_cd_do_request"); 842 843 if (blk_fs_request(rq)) { 844 if (cdrom_start_rw(drive, rq) == ide_stopped) 845 goto out_end; 846 } else if (blk_sense_request(rq) || blk_pc_request(rq) || 847 rq->cmd_type == REQ_TYPE_ATA_PC) { 848 if (!rq->timeout) 849 rq->timeout = ATAPI_WAIT_PC; 850 851 cdrom_do_block_pc(drive, rq); 852 } else if (blk_special_request(rq)) { 853 /* right now this can only be a reset... */ 854 uptodate = 1; 855 goto out_end; 856 } else { 857 blk_dump_rq_flags(rq, DRV_NAME " bad flags"); 858 if (rq->errors == 0) 859 rq->errors = -EIO; 860 goto out_end; 861 } 862 863 /* prepare sense request for this command */ 864 ide_prep_sense(drive, rq); 865 866 memset(&cmd, 0, sizeof(cmd)); 867 868 if (rq_data_dir(rq)) 869 cmd.tf_flags |= IDE_TFLAG_WRITE; 870 871 cmd.rq = rq; 872 873 if (blk_fs_request(rq) || rq->data_len) { 874 ide_init_sg_cmd(&cmd, blk_fs_request(rq) ? (rq->nr_sectors << 9) 875 : rq->data_len); 876 ide_map_sg(drive, &cmd); 877 } 878 879 return ide_issue_pc(drive, &cmd); 880out_end: 881 nsectors = rq->hard_nr_sectors; 882 883 if (nsectors == 0) 884 nsectors = 1; 885 886 ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9); 887 888 return ide_stopped; 889} 890 891/* 892 * Ioctl handling. 893 * 894 * Routines which queue packet commands take as a final argument a pointer to a 895 * request_sense struct. If execution of the command results in an error with a 896 * CHECK CONDITION status, this structure will be filled with the results of the 897 * subsequent request sense command. The pointer can also be NULL, in which case 898 * no sense information is returned. 899 */ 900static void msf_from_bcd(struct atapi_msf *msf) 901{ 902 msf->minute = bcd2bin(msf->minute); 903 msf->second = bcd2bin(msf->second); 904 msf->frame = bcd2bin(msf->frame); 905} 906 907int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense) 908{ 909 struct cdrom_info *info = drive->driver_data; 910 struct cdrom_device_info *cdi = &info->devinfo; 911 unsigned char cmd[BLK_MAX_CDB]; 912 913 ide_debug_log(IDE_DBG_FUNC, "enter"); 914 915 memset(cmd, 0, BLK_MAX_CDB); 916 cmd[0] = GPCMD_TEST_UNIT_READY; 917 918 /* 919 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs 920 * instead of supporting the LOAD_UNLOAD opcode. 921 */ 922 cmd[7] = cdi->sanyo_slot % 3; 923 924 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET); 925} 926 927static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity, 928 unsigned long *sectors_per_frame, 929 struct request_sense *sense) 930{ 931 struct { 932 __be32 lba; 933 __be32 blocklen; 934 } capbuf; 935 936 int stat; 937 unsigned char cmd[BLK_MAX_CDB]; 938 unsigned len = sizeof(capbuf); 939 u32 blocklen; 940 941 ide_debug_log(IDE_DBG_FUNC, "enter"); 942 943 memset(cmd, 0, BLK_MAX_CDB); 944 cmd[0] = GPCMD_READ_CDVD_CAPACITY; 945 946 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0, 947 REQ_QUIET); 948 if (stat) 949 return stat; 950 951 /* 952 * Sanity check the given block size 953 */ 954 blocklen = be32_to_cpu(capbuf.blocklen); 955 switch (blocklen) { 956 case 512: 957 case 1024: 958 case 2048: 959 case 4096: 960 break; 961 default: 962 printk(KERN_ERR PFX "%s: weird block size %u\n", 963 drive->name, blocklen); 964 printk(KERN_ERR PFX "%s: default to 2kb block size\n", 965 drive->name); 966 blocklen = 2048; 967 break; 968 } 969 970 *capacity = 1 + be32_to_cpu(capbuf.lba); 971 *sectors_per_frame = blocklen >> SECTOR_BITS; 972 973 ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu", 974 *capacity, *sectors_per_frame); 975 976 return 0; 977} 978 979static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag, 980 int format, char *buf, int buflen, 981 struct request_sense *sense) 982{ 983 unsigned char cmd[BLK_MAX_CDB]; 984 985 ide_debug_log(IDE_DBG_FUNC, "enter"); 986 987 memset(cmd, 0, BLK_MAX_CDB); 988 989 cmd[0] = GPCMD_READ_TOC_PMA_ATIP; 990 cmd[6] = trackno; 991 cmd[7] = (buflen >> 8); 992 cmd[8] = (buflen & 0xff); 993 cmd[9] = (format << 6); 994 995 if (msf_flag) 996 cmd[1] = 2; 997 998 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET); 999} 1000 1001/* Try to read the entire TOC for the disk into our internal buffer. */ 1002int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense) 1003{ 1004 int stat, ntracks, i; 1005 struct cdrom_info *info = drive->driver_data; 1006 struct cdrom_device_info *cdi = &info->devinfo; 1007 struct atapi_toc *toc = info->toc; 1008 struct { 1009 struct atapi_toc_header hdr; 1010 struct atapi_toc_entry ent; 1011 } ms_tmp; 1012 long last_written; 1013 unsigned long sectors_per_frame = SECTORS_PER_FRAME; 1014 1015 ide_debug_log(IDE_DBG_FUNC, "enter"); 1016 1017 if (toc == NULL) { 1018 /* try to allocate space */ 1019 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL); 1020 if (toc == NULL) { 1021 printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n", 1022 drive->name); 1023 return -ENOMEM; 1024 } 1025 info->toc = toc; 1026 } 1027 1028 /* 1029 * Check to see if the existing data is still valid. If it is, 1030 * just return. 1031 */ 1032 (void) cdrom_check_status(drive, sense); 1033 1034 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID) 1035 return 0; 1036 1037 /* try to get the total cdrom capacity and sector size */ 1038 stat = cdrom_read_capacity(drive, &toc->capacity, §ors_per_frame, 1039 sense); 1040 if (stat) 1041 toc->capacity = 0x1fffff; 1042 1043 set_capacity(info->disk, toc->capacity * sectors_per_frame); 1044 /* save a private copy of the TOC capacity for error handling */ 1045 drive->probed_capacity = toc->capacity * sectors_per_frame; 1046 1047 blk_queue_hardsect_size(drive->queue, 1048 sectors_per_frame << SECTOR_BITS); 1049 1050 /* first read just the header, so we know how long the TOC is */ 1051 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr, 1052 sizeof(struct atapi_toc_header), sense); 1053 if (stat) 1054 return stat; 1055 1056 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1057 toc->hdr.first_track = bcd2bin(toc->hdr.first_track); 1058 toc->hdr.last_track = bcd2bin(toc->hdr.last_track); 1059 } 1060 1061 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1; 1062 if (ntracks <= 0) 1063 return -EIO; 1064 if (ntracks > MAX_TRACKS) 1065 ntracks = MAX_TRACKS; 1066 1067 /* now read the whole schmeer */ 1068 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0, 1069 (char *)&toc->hdr, 1070 sizeof(struct atapi_toc_header) + 1071 (ntracks + 1) * 1072 sizeof(struct atapi_toc_entry), sense); 1073 1074 if (stat && toc->hdr.first_track > 1) { 1075 /* 1076 * Cds with CDI tracks only don't have any TOC entries, despite 1077 * of this the returned values are 1078 * first_track == last_track = number of CDI tracks + 1, 1079 * so that this case is indistinguishable from the same layout 1080 * plus an additional audio track. If we get an error for the 1081 * regular case, we assume a CDI without additional audio 1082 * tracks. In this case the readable TOC is empty (CDI tracks 1083 * are not included) and only holds the Leadout entry. 1084 * 1085 * Heiko Eißfeldt. 1086 */ 1087 ntracks = 0; 1088 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0, 1089 (char *)&toc->hdr, 1090 sizeof(struct atapi_toc_header) + 1091 (ntracks + 1) * 1092 sizeof(struct atapi_toc_entry), 1093 sense); 1094 if (stat) 1095 return stat; 1096 1097 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1098 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT); 1099 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT); 1100 } else { 1101 toc->hdr.first_track = CDROM_LEADOUT; 1102 toc->hdr.last_track = CDROM_LEADOUT; 1103 } 1104 } 1105 1106 if (stat) 1107 return stat; 1108 1109 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length); 1110 1111 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1112 toc->hdr.first_track = bcd2bin(toc->hdr.first_track); 1113 toc->hdr.last_track = bcd2bin(toc->hdr.last_track); 1114 } 1115 1116 for (i = 0; i <= ntracks; i++) { 1117 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) { 1118 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) 1119 toc->ent[i].track = bcd2bin(toc->ent[i].track); 1120 msf_from_bcd(&toc->ent[i].addr.msf); 1121 } 1122 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute, 1123 toc->ent[i].addr.msf.second, 1124 toc->ent[i].addr.msf.frame); 1125 } 1126 1127 if (toc->hdr.first_track != CDROM_LEADOUT) { 1128 /* read the multisession information */ 1129 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp, 1130 sizeof(ms_tmp), sense); 1131 if (stat) 1132 return stat; 1133 1134 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba); 1135 } else { 1136 ms_tmp.hdr.last_track = CDROM_LEADOUT; 1137 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track; 1138 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */ 1139 } 1140 1141 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) { 1142 /* re-read multisession information using MSF format */ 1143 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp, 1144 sizeof(ms_tmp), sense); 1145 if (stat) 1146 return stat; 1147 1148 msf_from_bcd(&ms_tmp.ent.addr.msf); 1149 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute, 1150 ms_tmp.ent.addr.msf.second, 1151 ms_tmp.ent.addr.msf.frame); 1152 } 1153 1154 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track); 1155 1156 /* now try to get the total cdrom capacity */ 1157 stat = cdrom_get_last_written(cdi, &last_written); 1158 if (!stat && (last_written > toc->capacity)) { 1159 toc->capacity = last_written; 1160 set_capacity(info->disk, toc->capacity * sectors_per_frame); 1161 drive->probed_capacity = toc->capacity * sectors_per_frame; 1162 } 1163 1164 /* Remember that we've read this stuff. */ 1165 drive->atapi_flags |= IDE_AFLAG_TOC_VALID; 1166 1167 return 0; 1168} 1169 1170int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf) 1171{ 1172 struct cdrom_info *info = drive->driver_data; 1173 struct cdrom_device_info *cdi = &info->devinfo; 1174 struct packet_command cgc; 1175 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE; 1176 1177 ide_debug_log(IDE_DBG_FUNC, "enter"); 1178 1179 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0) 1180 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE; 1181 1182 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN); 1183 do { 1184 /* we seem to get stat=0x01,err=0x00 the first time (??) */ 1185 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0); 1186 if (!stat) 1187 break; 1188 } while (--attempts); 1189 return stat; 1190} 1191 1192void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf) 1193{ 1194 struct cdrom_info *cd = drive->driver_data; 1195 u16 curspeed, maxspeed; 1196 1197 ide_debug_log(IDE_DBG_FUNC, "enter"); 1198 1199 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) { 1200 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]); 1201 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]); 1202 } else { 1203 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]); 1204 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]); 1205 } 1206 1207 ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u", 1208 curspeed, maxspeed); 1209 1210 cd->current_speed = (curspeed + (176/2)) / 176; 1211 cd->max_speed = (maxspeed + (176/2)) / 176; 1212} 1213 1214#define IDE_CD_CAPABILITIES \ 1215 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \ 1216 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \ 1217 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \ 1218 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \ 1219 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM) 1220 1221static struct cdrom_device_ops ide_cdrom_dops = { 1222 .open = ide_cdrom_open_real, 1223 .release = ide_cdrom_release_real, 1224 .drive_status = ide_cdrom_drive_status, 1225 .media_changed = ide_cdrom_check_media_change_real, 1226 .tray_move = ide_cdrom_tray_move, 1227 .lock_door = ide_cdrom_lock_door, 1228 .select_speed = ide_cdrom_select_speed, 1229 .get_last_session = ide_cdrom_get_last_session, 1230 .get_mcn = ide_cdrom_get_mcn, 1231 .reset = ide_cdrom_reset, 1232 .audio_ioctl = ide_cdrom_audio_ioctl, 1233 .capability = IDE_CD_CAPABILITIES, 1234 .generic_packet = ide_cdrom_packet, 1235}; 1236 1237static int ide_cdrom_register(ide_drive_t *drive, int nslots) 1238{ 1239 struct cdrom_info *info = drive->driver_data; 1240 struct cdrom_device_info *devinfo = &info->devinfo; 1241 1242 ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots); 1243 1244 devinfo->ops = &ide_cdrom_dops; 1245 devinfo->speed = info->current_speed; 1246 devinfo->capacity = nslots; 1247 devinfo->handle = drive; 1248 strcpy(devinfo->name, drive->name); 1249 1250 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT) 1251 devinfo->mask |= CDC_SELECT_SPEED; 1252 1253 devinfo->disk = info->disk; 1254 return register_cdrom(devinfo); 1255} 1256 1257static int ide_cdrom_probe_capabilities(ide_drive_t *drive) 1258{ 1259 struct cdrom_info *cd = drive->driver_data; 1260 struct cdrom_device_info *cdi = &cd->devinfo; 1261 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE]; 1262 mechtype_t mechtype; 1263 int nslots = 1; 1264 1265 ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx", 1266 drive->media, drive->atapi_flags); 1267 1268 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R | 1269 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO | 1270 CDC_MO_DRIVE | CDC_RAM); 1271 1272 if (drive->media == ide_optical) { 1273 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM); 1274 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n", 1275 drive->name); 1276 return nslots; 1277 } 1278 1279 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) { 1280 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT; 1281 cdi->mask &= ~CDC_PLAY_AUDIO; 1282 return nslots; 1283 } 1284 1285 /* 1286 * We have to cheat a little here. the packet will eventually be queued 1287 * with ide_cdrom_packet(), which extracts the drive from cdi->handle. 1288 * Since this device hasn't been registered with the Uniform layer yet, 1289 * it can't do this. Same goes for cdi->ops. 1290 */ 1291 cdi->handle = drive; 1292 cdi->ops = &ide_cdrom_dops; 1293 1294 if (ide_cdrom_get_capabilities(drive, buf)) 1295 return 0; 1296 1297 if ((buf[8 + 6] & 0x01) == 0) 1298 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING; 1299 if (buf[8 + 6] & 0x08) 1300 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT; 1301 if (buf[8 + 3] & 0x01) 1302 cdi->mask &= ~CDC_CD_R; 1303 if (buf[8 + 3] & 0x02) 1304 cdi->mask &= ~(CDC_CD_RW | CDC_RAM); 1305 if (buf[8 + 2] & 0x38) 1306 cdi->mask &= ~CDC_DVD; 1307 if (buf[8 + 3] & 0x20) 1308 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM); 1309 if (buf[8 + 3] & 0x10) 1310 cdi->mask &= ~CDC_DVD_R; 1311 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK)) 1312 cdi->mask &= ~CDC_PLAY_AUDIO; 1313 1314 mechtype = buf[8 + 6] >> 5; 1315 if (mechtype == mechtype_caddy || 1316 mechtype == mechtype_popup || 1317 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE)) 1318 cdi->mask |= CDC_CLOSE_TRAY; 1319 1320 if (cdi->sanyo_slot > 0) { 1321 cdi->mask &= ~CDC_SELECT_DISC; 1322 nslots = 3; 1323 } else if (mechtype == mechtype_individual_changer || 1324 mechtype == mechtype_cartridge_changer) { 1325 nslots = cdrom_number_of_slots(cdi); 1326 if (nslots > 1) 1327 cdi->mask &= ~CDC_SELECT_DISC; 1328 } 1329 1330 ide_cdrom_update_speed(drive, buf); 1331 1332 printk(KERN_INFO PFX "%s: ATAPI", drive->name); 1333 1334 /* don't print speed if the drive reported 0 */ 1335 if (cd->max_speed) 1336 printk(KERN_CONT " %dX", cd->max_speed); 1337 1338 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM"); 1339 1340 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0) 1341 printk(KERN_CONT " DVD%s%s", 1342 (cdi->mask & CDC_DVD_R) ? "" : "-R", 1343 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM"); 1344 1345 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0) 1346 printk(KERN_CONT " CD%s%s", 1347 (cdi->mask & CDC_CD_R) ? "" : "-R", 1348 (cdi->mask & CDC_CD_RW) ? "" : "/RW"); 1349 1350 if ((cdi->mask & CDC_SELECT_DISC) == 0) 1351 printk(KERN_CONT " changer w/%d slots", nslots); 1352 else 1353 printk(KERN_CONT " drive"); 1354 1355 printk(KERN_CONT ", %dkB Cache\n", 1356 be16_to_cpup((__be16 *)&buf[8 + 12])); 1357 1358 return nslots; 1359} 1360 1361/* standard prep_rq_fn that builds 10 byte cmds */ 1362static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq) 1363{ 1364 int hard_sect = queue_hardsect_size(q); 1365 long block = (long)rq->hard_sector / (hard_sect >> 9); 1366 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9); 1367 1368 memset(rq->cmd, 0, BLK_MAX_CDB); 1369 1370 if (rq_data_dir(rq) == READ) 1371 rq->cmd[0] = GPCMD_READ_10; 1372 else 1373 rq->cmd[0] = GPCMD_WRITE_10; 1374 1375 /* 1376 * fill in lba 1377 */ 1378 rq->cmd[2] = (block >> 24) & 0xff; 1379 rq->cmd[3] = (block >> 16) & 0xff; 1380 rq->cmd[4] = (block >> 8) & 0xff; 1381 rq->cmd[5] = block & 0xff; 1382 1383 /* 1384 * and transfer length 1385 */ 1386 rq->cmd[7] = (blocks >> 8) & 0xff; 1387 rq->cmd[8] = blocks & 0xff; 1388 rq->cmd_len = 10; 1389 return BLKPREP_OK; 1390} 1391 1392/* 1393 * Most of the SCSI commands are supported directly by ATAPI devices. 1394 * This transform handles the few exceptions. 1395 */ 1396static int ide_cdrom_prep_pc(struct request *rq) 1397{ 1398 u8 *c = rq->cmd; 1399 1400 /* transform 6-byte read/write commands to the 10-byte version */ 1401 if (c[0] == READ_6 || c[0] == WRITE_6) { 1402 c[8] = c[4]; 1403 c[5] = c[3]; 1404 c[4] = c[2]; 1405 c[3] = c[1] & 0x1f; 1406 c[2] = 0; 1407 c[1] &= 0xe0; 1408 c[0] += (READ_10 - READ_6); 1409 rq->cmd_len = 10; 1410 return BLKPREP_OK; 1411 } 1412 1413 /* 1414 * it's silly to pretend we understand 6-byte sense commands, just 1415 * reject with ILLEGAL_REQUEST and the caller should take the 1416 * appropriate action 1417 */ 1418 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) { 1419 rq->errors = ILLEGAL_REQUEST; 1420 return BLKPREP_KILL; 1421 } 1422 1423 return BLKPREP_OK; 1424} 1425 1426static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq) 1427{ 1428 if (blk_fs_request(rq)) 1429 return ide_cdrom_prep_fs(q, rq); 1430 else if (blk_pc_request(rq)) 1431 return ide_cdrom_prep_pc(rq); 1432 1433 return 0; 1434} 1435 1436struct cd_list_entry { 1437 const char *id_model; 1438 const char *id_firmware; 1439 unsigned int cd_flags; 1440}; 1441 1442#ifdef CONFIG_IDE_PROC_FS 1443static sector_t ide_cdrom_capacity(ide_drive_t *drive) 1444{ 1445 unsigned long capacity, sectors_per_frame; 1446 1447 if (cdrom_read_capacity(drive, &capacity, §ors_per_frame, NULL)) 1448 return 0; 1449 1450 return capacity * sectors_per_frame; 1451} 1452 1453static int proc_idecd_read_capacity(char *page, char **start, off_t off, 1454 int count, int *eof, void *data) 1455{ 1456 ide_drive_t *drive = data; 1457 int len; 1458 1459 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive)); 1460 PROC_IDE_READ_RETURN(page, start, off, count, eof, len); 1461} 1462 1463static ide_proc_entry_t idecd_proc[] = { 1464 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL }, 1465 { NULL, 0, NULL, NULL } 1466}; 1467 1468static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive) 1469{ 1470 return idecd_proc; 1471} 1472 1473static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive) 1474{ 1475 return NULL; 1476} 1477#endif 1478 1479static const struct cd_list_entry ide_cd_quirks_list[] = { 1480 /* SCR-3231 doesn't support the SET_CD_SPEED command. */ 1481 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT }, 1482 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */ 1483 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD | 1484 IDE_AFLAG_PRE_ATAPI12, }, 1485 /* Vertos 300, some versions of this drive like to talk BCD. */ 1486 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, }, 1487 /* Vertos 600 ESD. */ 1488 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, }, 1489 /* 1490 * Sanyo 3 CD changer uses a non-standard command for CD changing 1491 * (by default standard ATAPI support for CD changers is used). 1492 */ 1493 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD }, 1494 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD }, 1495 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD }, 1496 /* Stingray 8X CD-ROM. */ 1497 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 }, 1498 /* 1499 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length 1500 * mode sense page capabilities size, but older drives break. 1501 */ 1502 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE }, 1503 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE }, 1504 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */ 1505 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS }, 1506 /* 1507 * Some drives used by Apple don't advertise audio play 1508 * but they do support reading TOC & audio datas. 1509 */ 1510 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1511 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1512 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1513 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1514 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1515 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1516 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE }, 1517 { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE }, 1518 { NULL, NULL, 0 } 1519}; 1520 1521static unsigned int ide_cd_flags(u16 *id) 1522{ 1523 const struct cd_list_entry *cle = ide_cd_quirks_list; 1524 1525 while (cle->id_model) { 1526 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 && 1527 (cle->id_firmware == NULL || 1528 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware))) 1529 return cle->cd_flags; 1530 cle++; 1531 } 1532 1533 return 0; 1534} 1535 1536static int ide_cdrom_setup(ide_drive_t *drive) 1537{ 1538 struct cdrom_info *cd = drive->driver_data; 1539 struct cdrom_device_info *cdi = &cd->devinfo; 1540 struct request_queue *q = drive->queue; 1541 u16 *id = drive->id; 1542 char *fw_rev = (char *)&id[ATA_ID_FW_REV]; 1543 int nslots; 1544 1545 ide_debug_log(IDE_DBG_PROBE, "enter"); 1546 1547 blk_queue_prep_rq(q, ide_cdrom_prep_fn); 1548 blk_queue_dma_alignment(q, 31); 1549 blk_queue_update_dma_pad(q, 15); 1550 1551 q->unplug_delay = max((1 * HZ) / 1000, 1); 1552 1553 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED; 1554 drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id); 1555 1556 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) && 1557 fw_rev[4] == '1' && fw_rev[6] <= '2') 1558 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD | 1559 IDE_AFLAG_TOCADDR_AS_BCD); 1560 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) && 1561 fw_rev[4] == '1' && fw_rev[6] <= '2') 1562 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD; 1563 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD) 1564 /* 3 => use CD in slot 0 */ 1565 cdi->sanyo_slot = 3; 1566 1567 nslots = ide_cdrom_probe_capabilities(drive); 1568 1569 blk_queue_hardsect_size(q, CD_FRAMESIZE); 1570 1571 if (ide_cdrom_register(drive, nslots)) { 1572 printk(KERN_ERR PFX "%s: %s failed to register device with the" 1573 " cdrom driver.\n", drive->name, __func__); 1574 cd->devinfo.handle = NULL; 1575 return 1; 1576 } 1577 1578 ide_proc_register_driver(drive, cd->driver); 1579 return 0; 1580} 1581 1582static void ide_cd_remove(ide_drive_t *drive) 1583{ 1584 struct cdrom_info *info = drive->driver_data; 1585 1586 ide_debug_log(IDE_DBG_FUNC, "enter"); 1587 1588 ide_proc_unregister_driver(drive, info->driver); 1589 device_del(&info->dev); 1590 del_gendisk(info->disk); 1591 1592 mutex_lock(&idecd_ref_mutex); 1593 put_device(&info->dev); 1594 mutex_unlock(&idecd_ref_mutex); 1595} 1596 1597static void ide_cd_release(struct device *dev) 1598{ 1599 struct cdrom_info *info = to_ide_drv(dev, cdrom_info); 1600 struct cdrom_device_info *devinfo = &info->devinfo; 1601 ide_drive_t *drive = info->drive; 1602 struct gendisk *g = info->disk; 1603 1604 ide_debug_log(IDE_DBG_FUNC, "enter"); 1605 1606 kfree(info->toc); 1607 if (devinfo->handle == drive) 1608 unregister_cdrom(devinfo); 1609 drive->driver_data = NULL; 1610 blk_queue_prep_rq(drive->queue, NULL); 1611 g->private_data = NULL; 1612 put_disk(g); 1613 kfree(info); 1614} 1615 1616static int ide_cd_probe(ide_drive_t *); 1617 1618static struct ide_driver ide_cdrom_driver = { 1619 .gen_driver = { 1620 .owner = THIS_MODULE, 1621 .name = "ide-cdrom", 1622 .bus = &ide_bus_type, 1623 }, 1624 .probe = ide_cd_probe, 1625 .remove = ide_cd_remove, 1626 .version = IDECD_VERSION, 1627 .do_request = ide_cd_do_request, 1628#ifdef CONFIG_IDE_PROC_FS 1629 .proc_entries = ide_cd_proc_entries, 1630 .proc_devsets = ide_cd_proc_devsets, 1631#endif 1632}; 1633 1634static int idecd_open(struct block_device *bdev, fmode_t mode) 1635{ 1636 struct cdrom_info *info = ide_cd_get(bdev->bd_disk); 1637 int rc = -ENOMEM; 1638 1639 if (!info) 1640 return -ENXIO; 1641 1642 rc = cdrom_open(&info->devinfo, bdev, mode); 1643 1644 if (rc < 0) 1645 ide_cd_put(info); 1646 1647 return rc; 1648} 1649 1650static int idecd_release(struct gendisk *disk, fmode_t mode) 1651{ 1652 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 1653 1654 cdrom_release(&info->devinfo, mode); 1655 1656 ide_cd_put(info); 1657 1658 return 0; 1659} 1660 1661static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg) 1662{ 1663 struct packet_command cgc; 1664 char buffer[16]; 1665 int stat; 1666 char spindown; 1667 1668 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char))) 1669 return -EFAULT; 1670 1671 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN); 1672 1673 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0); 1674 if (stat) 1675 return stat; 1676 1677 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f); 1678 return cdrom_mode_select(cdi, &cgc); 1679} 1680 1681static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg) 1682{ 1683 struct packet_command cgc; 1684 char buffer[16]; 1685 int stat; 1686 char spindown; 1687 1688 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN); 1689 1690 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0); 1691 if (stat) 1692 return stat; 1693 1694 spindown = buffer[11] & 0x0f; 1695 if (copy_to_user((void __user *)arg, &spindown, sizeof(char))) 1696 return -EFAULT; 1697 return 0; 1698} 1699 1700static int idecd_ioctl(struct block_device *bdev, fmode_t mode, 1701 unsigned int cmd, unsigned long arg) 1702{ 1703 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info); 1704 int err; 1705 1706 switch (cmd) { 1707 case CDROMSETSPINDOWN: 1708 return idecd_set_spindown(&info->devinfo, arg); 1709 case CDROMGETSPINDOWN: 1710 return idecd_get_spindown(&info->devinfo, arg); 1711 default: 1712 break; 1713 } 1714 1715 err = generic_ide_ioctl(info->drive, bdev, cmd, arg); 1716 if (err == -EINVAL) 1717 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg); 1718 1719 return err; 1720} 1721 1722static int idecd_media_changed(struct gendisk *disk) 1723{ 1724 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 1725 return cdrom_media_changed(&info->devinfo); 1726} 1727 1728static int idecd_revalidate_disk(struct gendisk *disk) 1729{ 1730 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 1731 struct request_sense sense; 1732 1733 ide_cd_read_toc(info->drive, &sense); 1734 1735 return 0; 1736} 1737 1738static struct block_device_operations idecd_ops = { 1739 .owner = THIS_MODULE, 1740 .open = idecd_open, 1741 .release = idecd_release, 1742 .locked_ioctl = idecd_ioctl, 1743 .media_changed = idecd_media_changed, 1744 .revalidate_disk = idecd_revalidate_disk 1745}; 1746 1747/* module options */ 1748static unsigned long debug_mask; 1749module_param(debug_mask, ulong, 0644); 1750 1751MODULE_DESCRIPTION("ATAPI CD-ROM Driver"); 1752 1753static int ide_cd_probe(ide_drive_t *drive) 1754{ 1755 struct cdrom_info *info; 1756 struct gendisk *g; 1757 struct request_sense sense; 1758 1759 ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x", 1760 drive->driver_req, drive->media); 1761 1762 if (!strstr("ide-cdrom", drive->driver_req)) 1763 goto failed; 1764 1765 if (drive->media != ide_cdrom && drive->media != ide_optical) 1766 goto failed; 1767 1768 drive->debug_mask = debug_mask; 1769 drive->irq_handler = cdrom_newpc_intr; 1770 1771 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL); 1772 if (info == NULL) { 1773 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n", 1774 drive->name); 1775 goto failed; 1776 } 1777 1778 g = alloc_disk(1 << PARTN_BITS); 1779 if (!g) 1780 goto out_free_cd; 1781 1782 ide_init_disk(g, drive); 1783 1784 info->dev.parent = &drive->gendev; 1785 info->dev.release = ide_cd_release; 1786 dev_set_name(&info->dev, dev_name(&drive->gendev)); 1787 1788 if (device_register(&info->dev)) 1789 goto out_free_disk; 1790 1791 info->drive = drive; 1792 info->driver = &ide_cdrom_driver; 1793 info->disk = g; 1794 1795 g->private_data = &info->driver; 1796 1797 drive->driver_data = info; 1798 1799 g->minors = 1; 1800 g->driverfs_dev = &drive->gendev; 1801 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE; 1802 if (ide_cdrom_setup(drive)) { 1803 put_device(&info->dev); 1804 goto failed; 1805 } 1806 1807 ide_cd_read_toc(drive, &sense); 1808 g->fops = &idecd_ops; 1809 g->flags |= GENHD_FL_REMOVABLE; 1810 add_disk(g); 1811 return 0; 1812 1813out_free_disk: 1814 put_disk(g); 1815out_free_cd: 1816 kfree(info); 1817failed: 1818 return -ENODEV; 1819} 1820 1821static void __exit ide_cdrom_exit(void) 1822{ 1823 driver_unregister(&ide_cdrom_driver.gen_driver); 1824} 1825 1826static int __init ide_cdrom_init(void) 1827{ 1828 printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n"); 1829 return driver_register(&ide_cdrom_driver.gen_driver); 1830} 1831 1832MODULE_ALIAS("ide:*m-cdrom*"); 1833MODULE_ALIAS("ide-cd"); 1834module_init(ide_cdrom_init); 1835module_exit(ide_cdrom_exit); 1836MODULE_LICENSE("GPL"); 1837