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/seq_file.h> 34#include <linux/slab.h> 35#include <linux/interrupt.h> 36#include <linux/errno.h> 37#include <linux/cdrom.h> 38#include <linux/ide.h> 39#include <linux/completion.h> 40#include <linux/mutex.h> 41#include <linux/bcd.h> 42 43/* For SCSI -> ATAPI command conversion */ 44#include <scsi/scsi.h> 45 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(ide_cd_mutex); 54static DEFINE_MUTEX(idecd_ref_mutex); 55 56static void ide_cd_release(struct device *); 57 58static struct cdrom_info *ide_cd_get(struct gendisk *disk) 59{ 60 struct cdrom_info *cd = NULL; 61 62 mutex_lock(&idecd_ref_mutex); 63 cd = ide_drv_g(disk, cdrom_info); 64 if (cd) { 65 if (ide_device_get(cd->drive)) 66 cd = NULL; 67 else 68 get_device(&cd->dev); 69 70 } 71 mutex_unlock(&idecd_ref_mutex); 72 return cd; 73} 74 75static void ide_cd_put(struct cdrom_info *cd) 76{ 77 ide_drive_t *drive = cd->drive; 78 79 mutex_lock(&idecd_ref_mutex); 80 put_device(&cd->dev); 81 ide_device_put(drive); 82 mutex_unlock(&idecd_ref_mutex); 83} 84 85/* 86 * Generic packet command support and error handling routines. 87 */ 88 89/* Mark that we've seen a media change and invalidate our internal buffers. */ 90static void cdrom_saw_media_change(ide_drive_t *drive) 91{ 92 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED; 93 drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID; 94} 95 96static int cdrom_log_sense(ide_drive_t *drive, struct request *rq) 97{ 98 struct request_sense *sense = &drive->sense_data; 99 int log = 0; 100 101 if (!sense || !rq || (rq->cmd_flags & REQ_QUIET)) 102 return 0; 103 104 ide_debug_log(IDE_DBG_SENSE, "sense_key: 0x%x", sense->sense_key); 105 106 switch (sense->sense_key) { 107 case NO_SENSE: 108 case RECOVERED_ERROR: 109 break; 110 case NOT_READY: 111 /* 112 * don't care about tray state messages for e.g. capacity 113 * commands or in-progress or becoming ready 114 */ 115 if (sense->asc == 0x3a || sense->asc == 0x04) 116 break; 117 log = 1; 118 break; 119 case ILLEGAL_REQUEST: 120 /* 121 * don't log START_STOP unit with LoEj set, since we cannot 122 * reliably check if drive can auto-close 123 */ 124 if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24) 125 break; 126 log = 1; 127 break; 128 case UNIT_ATTENTION: 129 /* 130 * Make good and sure we've seen this potential media change. 131 * Some drives (i.e. Creative) fail to present the correct sense 132 * key in the error register. 133 */ 134 cdrom_saw_media_change(drive); 135 break; 136 default: 137 log = 1; 138 break; 139 } 140 return log; 141} 142 143static void cdrom_analyze_sense_data(ide_drive_t *drive, 144 struct request *failed_command) 145{ 146 struct request_sense *sense = &drive->sense_data; 147 struct cdrom_info *info = drive->driver_data; 148 unsigned long sector; 149 unsigned long bio_sectors; 150 151 ide_debug_log(IDE_DBG_SENSE, "error_code: 0x%x, sense_key: 0x%x", 152 sense->error_code, sense->sense_key); 153 154 if (failed_command) 155 ide_debug_log(IDE_DBG_SENSE, "failed cmd: 0x%x", 156 failed_command->cmd[0]); 157 158 if (!cdrom_log_sense(drive, failed_command)) 159 return; 160 161 /* 162 * If a read toc is executed for a CD-R or CD-RW medium where the first 163 * toc has not been recorded yet, it will fail with 05/24/00 (which is a 164 * confusing error) 165 */ 166 if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP) 167 if (sense->sense_key == 0x05 && sense->asc == 0x24) 168 return; 169 170 /* current error */ 171 if (sense->error_code == 0x70) { 172 switch (sense->sense_key) { 173 case MEDIUM_ERROR: 174 case VOLUME_OVERFLOW: 175 case ILLEGAL_REQUEST: 176 if (!sense->valid) 177 break; 178 if (failed_command == NULL || 179 failed_command->cmd_type != REQ_TYPE_FS) 180 break; 181 sector = (sense->information[0] << 24) | 182 (sense->information[1] << 16) | 183 (sense->information[2] << 8) | 184 (sense->information[3]); 185 186 if (queue_logical_block_size(drive->queue) == 2048) 187 /* device sector size is 2K */ 188 sector <<= 2; 189 190 bio_sectors = max(bio_sectors(failed_command->bio), 4U); 191 sector &= ~(bio_sectors - 1); 192 193 /* 194 * The SCSI specification allows for the value 195 * returned by READ CAPACITY to be up to 75 2K 196 * sectors past the last readable block. 197 * Therefore, if we hit a medium error within the 198 * last 75 2K sectors, we decrease the saved size 199 * value. 200 */ 201 if (sector < get_capacity(info->disk) && 202 drive->probed_capacity - sector < 4 * 75) 203 set_capacity(info->disk, sector); 204 } 205 } 206 207 ide_cd_log_error(drive->name, failed_command, sense); 208} 209 210static void ide_cd_complete_failed_rq(ide_drive_t *drive, struct request *rq) 211{ 212 /* 213 * For REQ_TYPE_SENSE, "rq->special" points to the original 214 * failed request. Also, the sense data should be read 215 * directly from rq which might be different from the original 216 * sense buffer if it got copied during mapping. 217 */ 218 struct request *failed = (struct request *)rq->special; 219 void *sense = bio_data(rq->bio); 220 221 if (failed) { 222 if (failed->sense) { 223 /* 224 * Sense is always read into drive->sense_data. 225 * Copy back if the failed request has its 226 * sense pointer set. 227 */ 228 memcpy(failed->sense, sense, 18); 229 failed->sense_len = rq->sense_len; 230 } 231 cdrom_analyze_sense_data(drive, failed); 232 233 if (ide_end_rq(drive, failed, -EIO, blk_rq_bytes(failed))) 234 BUG(); 235 } else 236 cdrom_analyze_sense_data(drive, NULL); 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 /* 261 * take a breather 262 */ 263 blk_delay_queue(drive->queue, 1); 264 return 1; 265 } 266} 267 268/** 269 * Returns: 270 * 0: if the request should be continued. 271 * 1: if the request will be going through error recovery. 272 * 2: if the request should be ended. 273 */ 274static int cdrom_decode_status(ide_drive_t *drive, u8 stat) 275{ 276 ide_hwif_t *hwif = drive->hwif; 277 struct request *rq = hwif->rq; 278 int err, sense_key, do_end_request = 0; 279 280 /* get the IDE error register */ 281 err = ide_read_error(drive); 282 sense_key = err >> 4; 283 284 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, rq->cmd_type: 0x%x, err: 0x%x, " 285 "stat 0x%x", 286 rq->cmd[0], rq->cmd_type, err, stat); 287 288 if (rq->cmd_type == REQ_TYPE_SENSE) { 289 /* 290 * We got an error trying to get sense info from the drive 291 * (probably while trying to recover from a former error). 292 * Just give up. 293 */ 294 rq->cmd_flags |= REQ_FAILED; 295 return 2; 296 } 297 298 /* if we have an error, pass CHECK_CONDITION as the SCSI status byte */ 299 if (rq->cmd_type == REQ_TYPE_BLOCK_PC && !rq->errors) 300 rq->errors = SAM_STAT_CHECK_CONDITION; 301 302 if (blk_noretry_request(rq)) 303 do_end_request = 1; 304 305 switch (sense_key) { 306 case NOT_READY: 307 if (rq->cmd_type == REQ_TYPE_FS && rq_data_dir(rq) == WRITE) { 308 if (ide_cd_breathe(drive, rq)) 309 return 1; 310 } else { 311 cdrom_saw_media_change(drive); 312 313 if (rq->cmd_type == REQ_TYPE_FS && 314 !(rq->cmd_flags & REQ_QUIET)) 315 printk(KERN_ERR PFX "%s: tray open\n", 316 drive->name); 317 } 318 do_end_request = 1; 319 break; 320 case UNIT_ATTENTION: 321 cdrom_saw_media_change(drive); 322 323 if (rq->cmd_type != REQ_TYPE_FS) 324 return 0; 325 326 /* 327 * Arrange to retry the request but be sure to give up if we've 328 * retried too many times. 329 */ 330 if (++rq->errors > ERROR_MAX) 331 do_end_request = 1; 332 break; 333 case ILLEGAL_REQUEST: 334 /* 335 * Don't print error message for this condition -- SFF8090i 336 * indicates that 5/24/00 is the correct response to a request 337 * to close the tray if the drive doesn't have that capability. 338 * 339 * cdrom_log_sense() knows this! 340 */ 341 if (rq->cmd[0] == GPCMD_START_STOP_UNIT) 342 break; 343 /* fall-through */ 344 case DATA_PROTECT: 345 /* 346 * No point in retrying after an illegal request or data 347 * protect error. 348 */ 349 if (!(rq->cmd_flags & REQ_QUIET)) 350 ide_dump_status(drive, "command error", stat); 351 do_end_request = 1; 352 break; 353 case MEDIUM_ERROR: 354 /* 355 * No point in re-trying a zillion times on a bad sector. 356 * If we got here the error is not correctable. 357 */ 358 if (!(rq->cmd_flags & REQ_QUIET)) 359 ide_dump_status(drive, "media error " 360 "(bad sector)", stat); 361 do_end_request = 1; 362 break; 363 case BLANK_CHECK: 364 /* disk appears blank? */ 365 if (!(rq->cmd_flags & REQ_QUIET)) 366 ide_dump_status(drive, "media error (blank)", 367 stat); 368 do_end_request = 1; 369 break; 370 default: 371 if (rq->cmd_type != REQ_TYPE_FS) 372 break; 373 if (err & ~ATA_ABORTED) { 374 /* go to the default handler for other errors */ 375 ide_error(drive, "cdrom_decode_status", stat); 376 return 1; 377 } else if (++rq->errors > ERROR_MAX) 378 /* we've racked up too many retries, abort */ 379 do_end_request = 1; 380 } 381 382 if (rq->cmd_type != REQ_TYPE_FS) { 383 rq->cmd_flags |= REQ_FAILED; 384 do_end_request = 1; 385 } 386 387 /* 388 * End a request through request sense analysis when we have sense data. 389 * We need this in order to perform end of media processing. 390 */ 391 if (do_end_request) 392 goto end_request; 393 394 /* if we got a CHECK_CONDITION status, queue a request sense command */ 395 if (stat & ATA_ERR) 396 return ide_queue_sense_rq(drive, NULL) ? 2 : 1; 397 return 1; 398 399end_request: 400 if (stat & ATA_ERR) { 401 hwif->rq = NULL; 402 return ide_queue_sense_rq(drive, rq) ? 2 : 1; 403 } else 404 return 2; 405} 406 407static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct ide_cmd *cmd) 408{ 409 struct request *rq = cmd->rq; 410 411 ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]); 412 413 /* 414 * Some of the trailing request sense fields are optional, 415 * and some drives don't send them. Sigh. 416 */ 417 if (rq->cmd[0] == GPCMD_REQUEST_SENSE && 418 cmd->nleft > 0 && cmd->nleft <= 5) 419 cmd->nleft = 0; 420} 421 422int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd, 423 int write, void *buffer, unsigned *bufflen, 424 struct request_sense *sense, int timeout, 425 unsigned int cmd_flags) 426{ 427 struct cdrom_info *info = drive->driver_data; 428 struct request_sense local_sense; 429 int retries = 10; 430 unsigned int flags = 0; 431 432 if (!sense) 433 sense = &local_sense; 434 435 ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, " 436 "cmd_flags: 0x%x", 437 cmd[0], write, timeout, cmd_flags); 438 439 /* start of retry loop */ 440 do { 441 struct request *rq; 442 int error; 443 444 rq = blk_get_request(drive->queue, write, __GFP_WAIT); 445 446 memcpy(rq->cmd, cmd, BLK_MAX_CDB); 447 rq->cmd_type = REQ_TYPE_ATA_PC; 448 rq->sense = sense; 449 rq->cmd_flags |= cmd_flags; 450 rq->timeout = timeout; 451 if (buffer) { 452 error = blk_rq_map_kern(drive->queue, rq, buffer, 453 *bufflen, GFP_NOIO); 454 if (error) { 455 blk_put_request(rq); 456 return error; 457 } 458 } 459 460 error = blk_execute_rq(drive->queue, info->disk, rq, 0); 461 462 if (buffer) 463 *bufflen = rq->resid_len; 464 465 flags = rq->cmd_flags; 466 blk_put_request(rq); 467 468 /* 469 * FIXME: we should probably abort/retry or something in case of 470 * failure. 471 */ 472 if (flags & REQ_FAILED) { 473 /* 474 * The request failed. Retry if it was due to a unit 475 * attention status (usually means media was changed). 476 */ 477 struct request_sense *reqbuf = sense; 478 479 if (reqbuf->sense_key == UNIT_ATTENTION) 480 cdrom_saw_media_change(drive); 481 else if (reqbuf->sense_key == NOT_READY && 482 reqbuf->asc == 4 && reqbuf->ascq != 4) { 483 /* 484 * The drive is in the process of loading 485 * a disk. Retry, but wait a little to give 486 * the drive time to complete the load. 487 */ 488 ssleep(2); 489 } else { 490 /* otherwise, don't retry */ 491 retries = 0; 492 } 493 --retries; 494 } 495 496 /* end of retry loop */ 497 } while ((flags & REQ_FAILED) && retries >= 0); 498 499 /* return an error if the command failed */ 500 return (flags & REQ_FAILED) ? -EIO : 0; 501} 502 503/* 504 * returns true if rq has been completed 505 */ 506static bool ide_cd_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd) 507{ 508 unsigned int nr_bytes = cmd->nbytes - cmd->nleft; 509 510 if (cmd->tf_flags & IDE_TFLAG_WRITE) 511 nr_bytes -= cmd->last_xfer_len; 512 513 if (nr_bytes > 0) { 514 ide_complete_rq(drive, 0, nr_bytes); 515 return true; 516 } 517 518 return false; 519} 520 521static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive) 522{ 523 ide_hwif_t *hwif = drive->hwif; 524 struct ide_cmd *cmd = &hwif->cmd; 525 struct request *rq = hwif->rq; 526 ide_expiry_t *expiry = NULL; 527 int dma_error = 0, dma, thislen, uptodate = 0; 528 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc = 0; 529 int sense = (rq->cmd_type == REQ_TYPE_SENSE); 530 unsigned int timeout; 531 u16 len; 532 u8 ireason, stat; 533 534 ide_debug_log(IDE_DBG_PC, "cmd: 0x%x, write: 0x%x", rq->cmd[0], write); 535 536 /* check for errors */ 537 dma = drive->dma; 538 if (dma) { 539 drive->dma = 0; 540 drive->waiting_for_dma = 0; 541 dma_error = hwif->dma_ops->dma_end(drive); 542 ide_dma_unmap_sg(drive, cmd); 543 if (dma_error) { 544 printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name, 545 write ? "write" : "read"); 546 ide_dma_off(drive); 547 } 548 } 549 550 /* check status */ 551 stat = hwif->tp_ops->read_status(hwif); 552 553 if (!OK_STAT(stat, 0, BAD_R_STAT)) { 554 rc = cdrom_decode_status(drive, stat); 555 if (rc) { 556 if (rc == 2) 557 goto out_end; 558 return ide_stopped; 559 } 560 } 561 562 /* using dma, transfer is complete now */ 563 if (dma) { 564 if (dma_error) 565 return ide_error(drive, "dma error", stat); 566 uptodate = 1; 567 goto out_end; 568 } 569 570 ide_read_bcount_and_ireason(drive, &len, &ireason); 571 572 thislen = (rq->cmd_type == REQ_TYPE_FS) ? len : cmd->nleft; 573 if (thislen > len) 574 thislen = len; 575 576 ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d", 577 stat, thislen); 578 579 /* If DRQ is clear, the command has completed. */ 580 if ((stat & ATA_DRQ) == 0) { 581 if (rq->cmd_type == REQ_TYPE_FS) { 582 /* 583 * If we're not done reading/writing, complain. 584 * Otherwise, complete the command normally. 585 */ 586 uptodate = 1; 587 if (cmd->nleft > 0) { 588 printk(KERN_ERR PFX "%s: %s: data underrun " 589 "(%u bytes)\n", drive->name, __func__, 590 cmd->nleft); 591 if (!write) 592 rq->cmd_flags |= REQ_FAILED; 593 uptodate = 0; 594 } 595 } else if (rq->cmd_type != REQ_TYPE_BLOCK_PC) { 596 ide_cd_request_sense_fixup(drive, cmd); 597 598 uptodate = cmd->nleft ? 0 : 1; 599 600 /* 601 * suck out the remaining bytes from the drive in an 602 * attempt to complete the data xfer. (see BZ#13399) 603 */ 604 if (!(stat & ATA_ERR) && !uptodate && thislen) { 605 ide_pio_bytes(drive, cmd, write, thislen); 606 uptodate = cmd->nleft ? 0 : 1; 607 } 608 609 if (!uptodate) 610 rq->cmd_flags |= REQ_FAILED; 611 } 612 goto out_end; 613 } 614 615 rc = ide_check_ireason(drive, rq, len, ireason, write); 616 if (rc) 617 goto out_end; 618 619 cmd->last_xfer_len = 0; 620 621 ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, " 622 "ireason: 0x%x", 623 rq->cmd_type, ireason); 624 625 /* transfer data */ 626 while (thislen > 0) { 627 int blen = min_t(int, thislen, cmd->nleft); 628 629 if (cmd->nleft == 0) 630 break; 631 632 ide_pio_bytes(drive, cmd, write, blen); 633 cmd->last_xfer_len += blen; 634 635 thislen -= blen; 636 len -= blen; 637 638 if (sense && write == 0) 639 rq->sense_len += blen; 640 } 641 642 /* pad, if necessary */ 643 if (len > 0) { 644 if (rq->cmd_type != REQ_TYPE_FS || write == 0) 645 ide_pad_transfer(drive, write, len); 646 else { 647 printk(KERN_ERR PFX "%s: confused, missing data\n", 648 drive->name); 649 blk_dump_rq_flags(rq, "cdrom_newpc_intr"); 650 } 651 } 652 653 if (rq->cmd_type == REQ_TYPE_BLOCK_PC) { 654 timeout = rq->timeout; 655 } else { 656 timeout = ATAPI_WAIT_PC; 657 if (rq->cmd_type != REQ_TYPE_FS) 658 expiry = ide_cd_expiry; 659 } 660 661 hwif->expiry = expiry; 662 ide_set_handler(drive, cdrom_newpc_intr, timeout); 663 return ide_started; 664 665out_end: 666 if (rq->cmd_type == REQ_TYPE_BLOCK_PC && rc == 0) { 667 rq->resid_len = 0; 668 blk_end_request_all(rq, 0); 669 hwif->rq = NULL; 670 } else { 671 if (sense && uptodate) 672 ide_cd_complete_failed_rq(drive, rq); 673 674 if (rq->cmd_type == REQ_TYPE_FS) { 675 if (cmd->nleft == 0) 676 uptodate = 1; 677 } else { 678 if (uptodate <= 0 && rq->errors == 0) 679 rq->errors = -EIO; 680 } 681 682 if (uptodate == 0 && rq->bio) 683 if (ide_cd_error_cmd(drive, cmd)) 684 return ide_stopped; 685 686 /* make sure it's fully ended */ 687 if (rq->cmd_type != REQ_TYPE_FS) { 688 rq->resid_len -= cmd->nbytes - cmd->nleft; 689 if (uptodate == 0 && (cmd->tf_flags & IDE_TFLAG_WRITE)) 690 rq->resid_len += cmd->last_xfer_len; 691 } 692 693 ide_complete_rq(drive, uptodate ? 0 : -EIO, blk_rq_bytes(rq)); 694 695 if (sense && rc == 2) 696 ide_error(drive, "request sense failure", stat); 697 } 698 return ide_stopped; 699} 700 701static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq) 702{ 703 struct cdrom_info *cd = drive->driver_data; 704 struct request_queue *q = drive->queue; 705 int write = rq_data_dir(rq) == WRITE; 706 unsigned short sectors_per_frame = 707 queue_logical_block_size(q) >> SECTOR_BITS; 708 709 ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, rq->cmd_flags: 0x%x, " 710 "secs_per_frame: %u", 711 rq->cmd[0], rq->cmd_flags, sectors_per_frame); 712 713 if (write) { 714 /* disk has become write protected */ 715 if (get_disk_ro(cd->disk)) 716 return ide_stopped; 717 } else { 718 /* 719 * We may be retrying this request after an error. Fix up any 720 * weirdness which might be present in the request packet. 721 */ 722 q->prep_rq_fn(q, rq); 723 } 724 725 /* fs requests *must* be hardware frame aligned */ 726 if ((blk_rq_sectors(rq) & (sectors_per_frame - 1)) || 727 (blk_rq_pos(rq) & (sectors_per_frame - 1))) 728 return ide_stopped; 729 730 /* use DMA, if possible */ 731 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA); 732 733 if (write) 734 cd->devinfo.media_written = 1; 735 736 rq->timeout = ATAPI_WAIT_PC; 737 738 return ide_started; 739} 740 741static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq) 742{ 743 744 ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x", 745 rq->cmd[0], rq->cmd_type); 746 747 if (rq->cmd_type == REQ_TYPE_BLOCK_PC) 748 rq->cmd_flags |= REQ_QUIET; 749 else 750 rq->cmd_flags &= ~REQ_FAILED; 751 752 drive->dma = 0; 753 754 /* sg request */ 755 if (rq->bio) { 756 struct request_queue *q = drive->queue; 757 char *buf = bio_data(rq->bio); 758 unsigned int alignment; 759 760 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA); 761 762 /* 763 * check if dma is safe 764 * 765 * NOTE! The "len" and "addr" checks should possibly have 766 * separate masks. 767 */ 768 alignment = queue_dma_alignment(q) | q->dma_pad_mask; 769 if ((unsigned long)buf & alignment 770 || blk_rq_bytes(rq) & q->dma_pad_mask 771 || object_is_on_stack(buf)) 772 drive->dma = 0; 773 } 774} 775 776static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq, 777 sector_t block) 778{ 779 struct ide_cmd cmd; 780 int uptodate = 0; 781 unsigned int nsectors; 782 783 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu", 784 rq->cmd[0], (unsigned long long)block); 785 786 if (drive->debug_mask & IDE_DBG_RQ) 787 blk_dump_rq_flags(rq, "ide_cd_do_request"); 788 789 switch (rq->cmd_type) { 790 case REQ_TYPE_FS: 791 if (cdrom_start_rw(drive, rq) == ide_stopped) 792 goto out_end; 793 break; 794 case REQ_TYPE_SENSE: 795 case REQ_TYPE_BLOCK_PC: 796 case REQ_TYPE_ATA_PC: 797 if (!rq->timeout) 798 rq->timeout = ATAPI_WAIT_PC; 799 800 cdrom_do_block_pc(drive, rq); 801 break; 802 case REQ_TYPE_SPECIAL: 803 /* right now this can only be a reset... */ 804 uptodate = 1; 805 goto out_end; 806 default: 807 BUG(); 808 } 809 810 /* prepare sense request for this command */ 811 ide_prep_sense(drive, rq); 812 813 memset(&cmd, 0, sizeof(cmd)); 814 815 if (rq_data_dir(rq)) 816 cmd.tf_flags |= IDE_TFLAG_WRITE; 817 818 cmd.rq = rq; 819 820 if (rq->cmd_type == REQ_TYPE_FS || blk_rq_bytes(rq)) { 821 ide_init_sg_cmd(&cmd, blk_rq_bytes(rq)); 822 ide_map_sg(drive, &cmd); 823 } 824 825 return ide_issue_pc(drive, &cmd); 826out_end: 827 nsectors = blk_rq_sectors(rq); 828 829 if (nsectors == 0) 830 nsectors = 1; 831 832 ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9); 833 834 return ide_stopped; 835} 836 837/* 838 * Ioctl handling. 839 * 840 * Routines which queue packet commands take as a final argument a pointer to a 841 * request_sense struct. If execution of the command results in an error with a 842 * CHECK CONDITION status, this structure will be filled with the results of the 843 * subsequent request sense command. The pointer can also be NULL, in which case 844 * no sense information is returned. 845 */ 846static void msf_from_bcd(struct atapi_msf *msf) 847{ 848 msf->minute = bcd2bin(msf->minute); 849 msf->second = bcd2bin(msf->second); 850 msf->frame = bcd2bin(msf->frame); 851} 852 853int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense) 854{ 855 struct cdrom_info *info = drive->driver_data; 856 struct cdrom_device_info *cdi = &info->devinfo; 857 unsigned char cmd[BLK_MAX_CDB]; 858 859 ide_debug_log(IDE_DBG_FUNC, "enter"); 860 861 memset(cmd, 0, BLK_MAX_CDB); 862 cmd[0] = GPCMD_TEST_UNIT_READY; 863 864 /* 865 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs 866 * instead of supporting the LOAD_UNLOAD opcode. 867 */ 868 cmd[7] = cdi->sanyo_slot % 3; 869 870 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET); 871} 872 873static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity, 874 unsigned long *sectors_per_frame, 875 struct request_sense *sense) 876{ 877 struct { 878 __be32 lba; 879 __be32 blocklen; 880 } capbuf; 881 882 int stat; 883 unsigned char cmd[BLK_MAX_CDB]; 884 unsigned len = sizeof(capbuf); 885 u32 blocklen; 886 887 ide_debug_log(IDE_DBG_FUNC, "enter"); 888 889 memset(cmd, 0, BLK_MAX_CDB); 890 cmd[0] = GPCMD_READ_CDVD_CAPACITY; 891 892 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0, 893 REQ_QUIET); 894 if (stat) 895 return stat; 896 897 /* 898 * Sanity check the given block size, in so far as making 899 * sure the sectors_per_frame we give to the caller won't 900 * end up being bogus. 901 */ 902 blocklen = be32_to_cpu(capbuf.blocklen); 903 blocklen = (blocklen >> SECTOR_BITS) << SECTOR_BITS; 904 switch (blocklen) { 905 case 512: 906 case 1024: 907 case 2048: 908 case 4096: 909 break; 910 default: 911 printk_once(KERN_ERR PFX "%s: weird block size %u; " 912 "setting default block size to 2048\n", 913 drive->name, blocklen); 914 blocklen = 2048; 915 break; 916 } 917 918 *capacity = 1 + be32_to_cpu(capbuf.lba); 919 *sectors_per_frame = blocklen >> SECTOR_BITS; 920 921 ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu", 922 *capacity, *sectors_per_frame); 923 924 return 0; 925} 926 927static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag, 928 int format, char *buf, int buflen, 929 struct request_sense *sense) 930{ 931 unsigned char cmd[BLK_MAX_CDB]; 932 933 ide_debug_log(IDE_DBG_FUNC, "enter"); 934 935 memset(cmd, 0, BLK_MAX_CDB); 936 937 cmd[0] = GPCMD_READ_TOC_PMA_ATIP; 938 cmd[6] = trackno; 939 cmd[7] = (buflen >> 8); 940 cmd[8] = (buflen & 0xff); 941 cmd[9] = (format << 6); 942 943 if (msf_flag) 944 cmd[1] = 2; 945 946 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET); 947} 948 949/* Try to read the entire TOC for the disk into our internal buffer. */ 950int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense) 951{ 952 int stat, ntracks, i; 953 struct cdrom_info *info = drive->driver_data; 954 struct cdrom_device_info *cdi = &info->devinfo; 955 struct atapi_toc *toc = info->toc; 956 struct { 957 struct atapi_toc_header hdr; 958 struct atapi_toc_entry ent; 959 } ms_tmp; 960 long last_written; 961 unsigned long sectors_per_frame = SECTORS_PER_FRAME; 962 963 ide_debug_log(IDE_DBG_FUNC, "enter"); 964 965 if (toc == NULL) { 966 /* try to allocate space */ 967 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL); 968 if (toc == NULL) { 969 printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n", 970 drive->name); 971 return -ENOMEM; 972 } 973 info->toc = toc; 974 } 975 976 /* 977 * Check to see if the existing data is still valid. If it is, 978 * just return. 979 */ 980 (void) cdrom_check_status(drive, sense); 981 982 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID) 983 return 0; 984 985 /* try to get the total cdrom capacity and sector size */ 986 stat = cdrom_read_capacity(drive, &toc->capacity, §ors_per_frame, 987 sense); 988 if (stat) 989 toc->capacity = 0x1fffff; 990 991 set_capacity(info->disk, toc->capacity * sectors_per_frame); 992 /* save a private copy of the TOC capacity for error handling */ 993 drive->probed_capacity = toc->capacity * sectors_per_frame; 994 995 blk_queue_logical_block_size(drive->queue, 996 sectors_per_frame << SECTOR_BITS); 997 998 /* first read just the header, so we know how long the TOC is */ 999 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr, 1000 sizeof(struct atapi_toc_header), sense); 1001 if (stat) 1002 return stat; 1003 1004 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1005 toc->hdr.first_track = bcd2bin(toc->hdr.first_track); 1006 toc->hdr.last_track = bcd2bin(toc->hdr.last_track); 1007 } 1008 1009 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1; 1010 if (ntracks <= 0) 1011 return -EIO; 1012 if (ntracks > MAX_TRACKS) 1013 ntracks = MAX_TRACKS; 1014 1015 /* now read the whole schmeer */ 1016 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0, 1017 (char *)&toc->hdr, 1018 sizeof(struct atapi_toc_header) + 1019 (ntracks + 1) * 1020 sizeof(struct atapi_toc_entry), sense); 1021 1022 if (stat && toc->hdr.first_track > 1) { 1023 /* 1024 * Cds with CDI tracks only don't have any TOC entries, despite 1025 * of this the returned values are 1026 * first_track == last_track = number of CDI tracks + 1, 1027 * so that this case is indistinguishable from the same layout 1028 * plus an additional audio track. If we get an error for the 1029 * regular case, we assume a CDI without additional audio 1030 * tracks. In this case the readable TOC is empty (CDI tracks 1031 * are not included) and only holds the Leadout entry. 1032 * 1033 * Heiko Eißfeldt. 1034 */ 1035 ntracks = 0; 1036 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0, 1037 (char *)&toc->hdr, 1038 sizeof(struct atapi_toc_header) + 1039 (ntracks + 1) * 1040 sizeof(struct atapi_toc_entry), 1041 sense); 1042 if (stat) 1043 return stat; 1044 1045 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1046 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT); 1047 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT); 1048 } else { 1049 toc->hdr.first_track = CDROM_LEADOUT; 1050 toc->hdr.last_track = CDROM_LEADOUT; 1051 } 1052 } 1053 1054 if (stat) 1055 return stat; 1056 1057 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length); 1058 1059 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1060 toc->hdr.first_track = bcd2bin(toc->hdr.first_track); 1061 toc->hdr.last_track = bcd2bin(toc->hdr.last_track); 1062 } 1063 1064 for (i = 0; i <= ntracks; i++) { 1065 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) { 1066 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) 1067 toc->ent[i].track = bcd2bin(toc->ent[i].track); 1068 msf_from_bcd(&toc->ent[i].addr.msf); 1069 } 1070 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute, 1071 toc->ent[i].addr.msf.second, 1072 toc->ent[i].addr.msf.frame); 1073 } 1074 1075 if (toc->hdr.first_track != CDROM_LEADOUT) { 1076 /* read the multisession information */ 1077 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp, 1078 sizeof(ms_tmp), sense); 1079 if (stat) 1080 return stat; 1081 1082 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba); 1083 } else { 1084 ms_tmp.hdr.last_track = CDROM_LEADOUT; 1085 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track; 1086 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */ 1087 } 1088 1089 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) { 1090 /* re-read multisession information using MSF format */ 1091 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp, 1092 sizeof(ms_tmp), sense); 1093 if (stat) 1094 return stat; 1095 1096 msf_from_bcd(&ms_tmp.ent.addr.msf); 1097 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute, 1098 ms_tmp.ent.addr.msf.second, 1099 ms_tmp.ent.addr.msf.frame); 1100 } 1101 1102 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track); 1103 1104 /* now try to get the total cdrom capacity */ 1105 stat = cdrom_get_last_written(cdi, &last_written); 1106 if (!stat && (last_written > toc->capacity)) { 1107 toc->capacity = last_written; 1108 set_capacity(info->disk, toc->capacity * sectors_per_frame); 1109 drive->probed_capacity = toc->capacity * sectors_per_frame; 1110 } 1111 1112 /* Remember that we've read this stuff. */ 1113 drive->atapi_flags |= IDE_AFLAG_TOC_VALID; 1114 1115 return 0; 1116} 1117 1118int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf) 1119{ 1120 struct cdrom_info *info = drive->driver_data; 1121 struct cdrom_device_info *cdi = &info->devinfo; 1122 struct packet_command cgc; 1123 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE; 1124 1125 ide_debug_log(IDE_DBG_FUNC, "enter"); 1126 1127 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0) 1128 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE; 1129 1130 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN); 1131 do { 1132 /* we seem to get stat=0x01,err=0x00 the first time (??) */ 1133 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0); 1134 if (!stat) 1135 break; 1136 } while (--attempts); 1137 return stat; 1138} 1139 1140void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf) 1141{ 1142 struct cdrom_info *cd = drive->driver_data; 1143 u16 curspeed, maxspeed; 1144 1145 ide_debug_log(IDE_DBG_FUNC, "enter"); 1146 1147 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) { 1148 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]); 1149 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]); 1150 } else { 1151 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]); 1152 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]); 1153 } 1154 1155 ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u", 1156 curspeed, maxspeed); 1157 1158 cd->current_speed = DIV_ROUND_CLOSEST(curspeed, 176); 1159 cd->max_speed = DIV_ROUND_CLOSEST(maxspeed, 176); 1160} 1161 1162#define IDE_CD_CAPABILITIES \ 1163 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \ 1164 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \ 1165 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \ 1166 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \ 1167 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM) 1168 1169static struct cdrom_device_ops ide_cdrom_dops = { 1170 .open = ide_cdrom_open_real, 1171 .release = ide_cdrom_release_real, 1172 .drive_status = ide_cdrom_drive_status, 1173 .check_events = ide_cdrom_check_events_real, 1174 .tray_move = ide_cdrom_tray_move, 1175 .lock_door = ide_cdrom_lock_door, 1176 .select_speed = ide_cdrom_select_speed, 1177 .get_last_session = ide_cdrom_get_last_session, 1178 .get_mcn = ide_cdrom_get_mcn, 1179 .reset = ide_cdrom_reset, 1180 .audio_ioctl = ide_cdrom_audio_ioctl, 1181 .capability = IDE_CD_CAPABILITIES, 1182 .generic_packet = ide_cdrom_packet, 1183}; 1184 1185static int ide_cdrom_register(ide_drive_t *drive, int nslots) 1186{ 1187 struct cdrom_info *info = drive->driver_data; 1188 struct cdrom_device_info *devinfo = &info->devinfo; 1189 1190 ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots); 1191 1192 devinfo->ops = &ide_cdrom_dops; 1193 devinfo->speed = info->current_speed; 1194 devinfo->capacity = nslots; 1195 devinfo->handle = drive; 1196 strcpy(devinfo->name, drive->name); 1197 1198 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT) 1199 devinfo->mask |= CDC_SELECT_SPEED; 1200 1201 devinfo->disk = info->disk; 1202 return register_cdrom(devinfo); 1203} 1204 1205static int ide_cdrom_probe_capabilities(ide_drive_t *drive) 1206{ 1207 struct cdrom_info *cd = drive->driver_data; 1208 struct cdrom_device_info *cdi = &cd->devinfo; 1209 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE]; 1210 mechtype_t mechtype; 1211 int nslots = 1; 1212 1213 ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx", 1214 drive->media, drive->atapi_flags); 1215 1216 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R | 1217 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO | 1218 CDC_MO_DRIVE | CDC_RAM); 1219 1220 if (drive->media == ide_optical) { 1221 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM); 1222 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n", 1223 drive->name); 1224 return nslots; 1225 } 1226 1227 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) { 1228 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT; 1229 cdi->mask &= ~CDC_PLAY_AUDIO; 1230 return nslots; 1231 } 1232 1233 /* 1234 * We have to cheat a little here. the packet will eventually be queued 1235 * with ide_cdrom_packet(), which extracts the drive from cdi->handle. 1236 * Since this device hasn't been registered with the Uniform layer yet, 1237 * it can't do this. Same goes for cdi->ops. 1238 */ 1239 cdi->handle = drive; 1240 cdi->ops = &ide_cdrom_dops; 1241 1242 if (ide_cdrom_get_capabilities(drive, buf)) 1243 return 0; 1244 1245 if ((buf[8 + 6] & 0x01) == 0) 1246 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING; 1247 if (buf[8 + 6] & 0x08) 1248 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT; 1249 if (buf[8 + 3] & 0x01) 1250 cdi->mask &= ~CDC_CD_R; 1251 if (buf[8 + 3] & 0x02) 1252 cdi->mask &= ~(CDC_CD_RW | CDC_RAM); 1253 if (buf[8 + 2] & 0x38) 1254 cdi->mask &= ~CDC_DVD; 1255 if (buf[8 + 3] & 0x20) 1256 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM); 1257 if (buf[8 + 3] & 0x10) 1258 cdi->mask &= ~CDC_DVD_R; 1259 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK)) 1260 cdi->mask &= ~CDC_PLAY_AUDIO; 1261 1262 mechtype = buf[8 + 6] >> 5; 1263 if (mechtype == mechtype_caddy || 1264 mechtype == mechtype_popup || 1265 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE)) 1266 cdi->mask |= CDC_CLOSE_TRAY; 1267 1268 if (cdi->sanyo_slot > 0) { 1269 cdi->mask &= ~CDC_SELECT_DISC; 1270 nslots = 3; 1271 } else if (mechtype == mechtype_individual_changer || 1272 mechtype == mechtype_cartridge_changer) { 1273 nslots = cdrom_number_of_slots(cdi); 1274 if (nslots > 1) 1275 cdi->mask &= ~CDC_SELECT_DISC; 1276 } 1277 1278 ide_cdrom_update_speed(drive, buf); 1279 1280 printk(KERN_INFO PFX "%s: ATAPI", drive->name); 1281 1282 /* don't print speed if the drive reported 0 */ 1283 if (cd->max_speed) 1284 printk(KERN_CONT " %dX", cd->max_speed); 1285 1286 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM"); 1287 1288 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0) 1289 printk(KERN_CONT " DVD%s%s", 1290 (cdi->mask & CDC_DVD_R) ? "" : "-R", 1291 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM"); 1292 1293 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0) 1294 printk(KERN_CONT " CD%s%s", 1295 (cdi->mask & CDC_CD_R) ? "" : "-R", 1296 (cdi->mask & CDC_CD_RW) ? "" : "/RW"); 1297 1298 if ((cdi->mask & CDC_SELECT_DISC) == 0) 1299 printk(KERN_CONT " changer w/%d slots", nslots); 1300 else 1301 printk(KERN_CONT " drive"); 1302 1303 printk(KERN_CONT ", %dkB Cache\n", 1304 be16_to_cpup((__be16 *)&buf[8 + 12])); 1305 1306 return nslots; 1307} 1308 1309/* standard prep_rq_fn that builds 10 byte cmds */ 1310static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq) 1311{ 1312 int hard_sect = queue_logical_block_size(q); 1313 long block = (long)blk_rq_pos(rq) / (hard_sect >> 9); 1314 unsigned long blocks = blk_rq_sectors(rq) / (hard_sect >> 9); 1315 1316 memset(rq->cmd, 0, BLK_MAX_CDB); 1317 1318 if (rq_data_dir(rq) == READ) 1319 rq->cmd[0] = GPCMD_READ_10; 1320 else 1321 rq->cmd[0] = GPCMD_WRITE_10; 1322 1323 /* 1324 * fill in lba 1325 */ 1326 rq->cmd[2] = (block >> 24) & 0xff; 1327 rq->cmd[3] = (block >> 16) & 0xff; 1328 rq->cmd[4] = (block >> 8) & 0xff; 1329 rq->cmd[5] = block & 0xff; 1330 1331 /* 1332 * and transfer length 1333 */ 1334 rq->cmd[7] = (blocks >> 8) & 0xff; 1335 rq->cmd[8] = blocks & 0xff; 1336 rq->cmd_len = 10; 1337 return BLKPREP_OK; 1338} 1339 1340/* 1341 * Most of the SCSI commands are supported directly by ATAPI devices. 1342 * This transform handles the few exceptions. 1343 */ 1344static int ide_cdrom_prep_pc(struct request *rq) 1345{ 1346 u8 *c = rq->cmd; 1347 1348 /* transform 6-byte read/write commands to the 10-byte version */ 1349 if (c[0] == READ_6 || c[0] == WRITE_6) { 1350 c[8] = c[4]; 1351 c[5] = c[3]; 1352 c[4] = c[2]; 1353 c[3] = c[1] & 0x1f; 1354 c[2] = 0; 1355 c[1] &= 0xe0; 1356 c[0] += (READ_10 - READ_6); 1357 rq->cmd_len = 10; 1358 return BLKPREP_OK; 1359 } 1360 1361 /* 1362 * it's silly to pretend we understand 6-byte sense commands, just 1363 * reject with ILLEGAL_REQUEST and the caller should take the 1364 * appropriate action 1365 */ 1366 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) { 1367 rq->errors = ILLEGAL_REQUEST; 1368 return BLKPREP_KILL; 1369 } 1370 1371 return BLKPREP_OK; 1372} 1373 1374static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq) 1375{ 1376 if (rq->cmd_type == REQ_TYPE_FS) 1377 return ide_cdrom_prep_fs(q, rq); 1378 else if (rq->cmd_type == REQ_TYPE_BLOCK_PC) 1379 return ide_cdrom_prep_pc(rq); 1380 1381 return 0; 1382} 1383 1384struct cd_list_entry { 1385 const char *id_model; 1386 const char *id_firmware; 1387 unsigned int cd_flags; 1388}; 1389 1390#ifdef CONFIG_IDE_PROC_FS 1391static sector_t ide_cdrom_capacity(ide_drive_t *drive) 1392{ 1393 unsigned long capacity, sectors_per_frame; 1394 1395 if (cdrom_read_capacity(drive, &capacity, §ors_per_frame, NULL)) 1396 return 0; 1397 1398 return capacity * sectors_per_frame; 1399} 1400 1401static int idecd_capacity_proc_show(struct seq_file *m, void *v) 1402{ 1403 ide_drive_t *drive = m->private; 1404 1405 seq_printf(m, "%llu\n", (long long)ide_cdrom_capacity(drive)); 1406 return 0; 1407} 1408 1409static int idecd_capacity_proc_open(struct inode *inode, struct file *file) 1410{ 1411 return single_open(file, idecd_capacity_proc_show, PDE_DATA(inode)); 1412} 1413 1414static const struct file_operations idecd_capacity_proc_fops = { 1415 .owner = THIS_MODULE, 1416 .open = idecd_capacity_proc_open, 1417 .read = seq_read, 1418 .llseek = seq_lseek, 1419 .release = single_release, 1420}; 1421 1422static ide_proc_entry_t idecd_proc[] = { 1423 { "capacity", S_IFREG|S_IRUGO, &idecd_capacity_proc_fops }, 1424 {} 1425}; 1426 1427static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive) 1428{ 1429 return idecd_proc; 1430} 1431 1432static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive) 1433{ 1434 return NULL; 1435} 1436#endif 1437 1438static const struct cd_list_entry ide_cd_quirks_list[] = { 1439 /* SCR-3231 doesn't support the SET_CD_SPEED command. */ 1440 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT }, 1441 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */ 1442 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD | 1443 IDE_AFLAG_PRE_ATAPI12, }, 1444 /* Vertos 300, some versions of this drive like to talk BCD. */ 1445 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, }, 1446 /* Vertos 600 ESD. */ 1447 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, }, 1448 /* 1449 * Sanyo 3 CD changer uses a non-standard command for CD changing 1450 * (by default standard ATAPI support for CD changers is used). 1451 */ 1452 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD }, 1453 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD }, 1454 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD }, 1455 /* Stingray 8X CD-ROM. */ 1456 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 }, 1457 /* 1458 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length 1459 * mode sense page capabilities size, but older drives break. 1460 */ 1461 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE }, 1462 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE }, 1463 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */ 1464 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS }, 1465 /* 1466 * Some drives used by Apple don't advertise audio play 1467 * but they do support reading TOC & audio datas. 1468 */ 1469 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1470 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1471 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1472 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1473 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1474 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1475 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE }, 1476 { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE }, 1477 { NULL, NULL, 0 } 1478}; 1479 1480static unsigned int ide_cd_flags(u16 *id) 1481{ 1482 const struct cd_list_entry *cle = ide_cd_quirks_list; 1483 1484 while (cle->id_model) { 1485 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 && 1486 (cle->id_firmware == NULL || 1487 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware))) 1488 return cle->cd_flags; 1489 cle++; 1490 } 1491 1492 return 0; 1493} 1494 1495static int ide_cdrom_setup(ide_drive_t *drive) 1496{ 1497 struct cdrom_info *cd = drive->driver_data; 1498 struct cdrom_device_info *cdi = &cd->devinfo; 1499 struct request_queue *q = drive->queue; 1500 u16 *id = drive->id; 1501 char *fw_rev = (char *)&id[ATA_ID_FW_REV]; 1502 int nslots; 1503 1504 ide_debug_log(IDE_DBG_PROBE, "enter"); 1505 1506 blk_queue_prep_rq(q, ide_cdrom_prep_fn); 1507 blk_queue_dma_alignment(q, 31); 1508 blk_queue_update_dma_pad(q, 15); 1509 1510 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED; 1511 drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id); 1512 1513 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) && 1514 fw_rev[4] == '1' && fw_rev[6] <= '2') 1515 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD | 1516 IDE_AFLAG_TOCADDR_AS_BCD); 1517 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) && 1518 fw_rev[4] == '1' && fw_rev[6] <= '2') 1519 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD; 1520 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD) 1521 /* 3 => use CD in slot 0 */ 1522 cdi->sanyo_slot = 3; 1523 1524 nslots = ide_cdrom_probe_capabilities(drive); 1525 1526 blk_queue_logical_block_size(q, CD_FRAMESIZE); 1527 1528 if (ide_cdrom_register(drive, nslots)) { 1529 printk(KERN_ERR PFX "%s: %s failed to register device with the" 1530 " cdrom driver.\n", drive->name, __func__); 1531 cd->devinfo.handle = NULL; 1532 return 1; 1533 } 1534 1535 ide_proc_register_driver(drive, cd->driver); 1536 return 0; 1537} 1538 1539static void ide_cd_remove(ide_drive_t *drive) 1540{ 1541 struct cdrom_info *info = drive->driver_data; 1542 1543 ide_debug_log(IDE_DBG_FUNC, "enter"); 1544 1545 ide_proc_unregister_driver(drive, info->driver); 1546 device_del(&info->dev); 1547 del_gendisk(info->disk); 1548 1549 mutex_lock(&idecd_ref_mutex); 1550 put_device(&info->dev); 1551 mutex_unlock(&idecd_ref_mutex); 1552} 1553 1554static void ide_cd_release(struct device *dev) 1555{ 1556 struct cdrom_info *info = to_ide_drv(dev, cdrom_info); 1557 struct cdrom_device_info *devinfo = &info->devinfo; 1558 ide_drive_t *drive = info->drive; 1559 struct gendisk *g = info->disk; 1560 1561 ide_debug_log(IDE_DBG_FUNC, "enter"); 1562 1563 kfree(info->toc); 1564 if (devinfo->handle == drive) 1565 unregister_cdrom(devinfo); 1566 drive->driver_data = NULL; 1567 blk_queue_prep_rq(drive->queue, NULL); 1568 g->private_data = NULL; 1569 put_disk(g); 1570 kfree(info); 1571} 1572 1573static int ide_cd_probe(ide_drive_t *); 1574 1575static struct ide_driver ide_cdrom_driver = { 1576 .gen_driver = { 1577 .owner = THIS_MODULE, 1578 .name = "ide-cdrom", 1579 .bus = &ide_bus_type, 1580 }, 1581 .probe = ide_cd_probe, 1582 .remove = ide_cd_remove, 1583 .version = IDECD_VERSION, 1584 .do_request = ide_cd_do_request, 1585#ifdef CONFIG_IDE_PROC_FS 1586 .proc_entries = ide_cd_proc_entries, 1587 .proc_devsets = ide_cd_proc_devsets, 1588#endif 1589}; 1590 1591static int idecd_open(struct block_device *bdev, fmode_t mode) 1592{ 1593 struct cdrom_info *info; 1594 int rc = -ENXIO; 1595 1596 mutex_lock(&ide_cd_mutex); 1597 info = ide_cd_get(bdev->bd_disk); 1598 if (!info) 1599 goto out; 1600 1601 rc = cdrom_open(&info->devinfo, bdev, mode); 1602 if (rc < 0) 1603 ide_cd_put(info); 1604out: 1605 mutex_unlock(&ide_cd_mutex); 1606 return rc; 1607} 1608 1609static void idecd_release(struct gendisk *disk, fmode_t mode) 1610{ 1611 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 1612 1613 mutex_lock(&ide_cd_mutex); 1614 cdrom_release(&info->devinfo, mode); 1615 1616 ide_cd_put(info); 1617 mutex_unlock(&ide_cd_mutex); 1618} 1619 1620static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg) 1621{ 1622 struct packet_command cgc; 1623 char buffer[16]; 1624 int stat; 1625 char spindown; 1626 1627 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char))) 1628 return -EFAULT; 1629 1630 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN); 1631 1632 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0); 1633 if (stat) 1634 return stat; 1635 1636 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f); 1637 return cdrom_mode_select(cdi, &cgc); 1638} 1639 1640static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg) 1641{ 1642 struct packet_command cgc; 1643 char buffer[16]; 1644 int stat; 1645 char spindown; 1646 1647 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN); 1648 1649 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0); 1650 if (stat) 1651 return stat; 1652 1653 spindown = buffer[11] & 0x0f; 1654 if (copy_to_user((void __user *)arg, &spindown, sizeof(char))) 1655 return -EFAULT; 1656 return 0; 1657} 1658 1659static int idecd_locked_ioctl(struct block_device *bdev, fmode_t mode, 1660 unsigned int cmd, unsigned long arg) 1661{ 1662 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info); 1663 int err; 1664 1665 switch (cmd) { 1666 case CDROMSETSPINDOWN: 1667 return idecd_set_spindown(&info->devinfo, arg); 1668 case CDROMGETSPINDOWN: 1669 return idecd_get_spindown(&info->devinfo, arg); 1670 default: 1671 break; 1672 } 1673 1674 err = generic_ide_ioctl(info->drive, bdev, cmd, arg); 1675 if (err == -EINVAL) 1676 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg); 1677 1678 return err; 1679} 1680 1681static int idecd_ioctl(struct block_device *bdev, fmode_t mode, 1682 unsigned int cmd, unsigned long arg) 1683{ 1684 int ret; 1685 1686 mutex_lock(&ide_cd_mutex); 1687 ret = idecd_locked_ioctl(bdev, mode, cmd, arg); 1688 mutex_unlock(&ide_cd_mutex); 1689 1690 return ret; 1691} 1692 1693 1694static unsigned int idecd_check_events(struct gendisk *disk, 1695 unsigned int clearing) 1696{ 1697 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 1698 return cdrom_check_events(&info->devinfo, clearing); 1699} 1700 1701static int idecd_revalidate_disk(struct gendisk *disk) 1702{ 1703 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 1704 struct request_sense sense; 1705 1706 ide_cd_read_toc(info->drive, &sense); 1707 1708 return 0; 1709} 1710 1711static const struct block_device_operations idecd_ops = { 1712 .owner = THIS_MODULE, 1713 .open = idecd_open, 1714 .release = idecd_release, 1715 .ioctl = idecd_ioctl, 1716 .check_events = idecd_check_events, 1717 .revalidate_disk = idecd_revalidate_disk 1718}; 1719 1720/* module options */ 1721static unsigned long debug_mask; 1722module_param(debug_mask, ulong, 0644); 1723 1724MODULE_DESCRIPTION("ATAPI CD-ROM Driver"); 1725 1726static int ide_cd_probe(ide_drive_t *drive) 1727{ 1728 struct cdrom_info *info; 1729 struct gendisk *g; 1730 struct request_sense sense; 1731 1732 ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x", 1733 drive->driver_req, drive->media); 1734 1735 if (!strstr("ide-cdrom", drive->driver_req)) 1736 goto failed; 1737 1738 if (drive->media != ide_cdrom && drive->media != ide_optical) 1739 goto failed; 1740 1741 drive->debug_mask = debug_mask; 1742 drive->irq_handler = cdrom_newpc_intr; 1743 1744 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL); 1745 if (info == NULL) { 1746 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n", 1747 drive->name); 1748 goto failed; 1749 } 1750 1751 g = alloc_disk(1 << PARTN_BITS); 1752 if (!g) 1753 goto out_free_cd; 1754 1755 ide_init_disk(g, drive); 1756 1757 info->dev.parent = &drive->gendev; 1758 info->dev.release = ide_cd_release; 1759 dev_set_name(&info->dev, "%s", dev_name(&drive->gendev)); 1760 1761 if (device_register(&info->dev)) 1762 goto out_free_disk; 1763 1764 info->drive = drive; 1765 info->driver = &ide_cdrom_driver; 1766 info->disk = g; 1767 1768 g->private_data = &info->driver; 1769 1770 drive->driver_data = info; 1771 1772 g->minors = 1; 1773 g->driverfs_dev = &drive->gendev; 1774 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE; 1775 if (ide_cdrom_setup(drive)) { 1776 put_device(&info->dev); 1777 goto failed; 1778 } 1779 1780 ide_cd_read_toc(drive, &sense); 1781 g->fops = &idecd_ops; 1782 g->flags |= GENHD_FL_REMOVABLE | GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE; 1783 add_disk(g); 1784 return 0; 1785 1786out_free_disk: 1787 put_disk(g); 1788out_free_cd: 1789 kfree(info); 1790failed: 1791 return -ENODEV; 1792} 1793 1794static void __exit ide_cdrom_exit(void) 1795{ 1796 driver_unregister(&ide_cdrom_driver.gen_driver); 1797} 1798 1799static int __init ide_cdrom_init(void) 1800{ 1801 printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n"); 1802 return driver_register(&ide_cdrom_driver.gen_driver); 1803} 1804 1805MODULE_ALIAS("ide:*m-cdrom*"); 1806MODULE_ALIAS("ide-cd"); 1807module_init(ide_cdrom_init); 1808module_exit(ide_cdrom_exit); 1809MODULE_LICENSE("GPL"); 1810