ide-cd.c revision 33659ebbae262228eef4e0fe990f393d1f0ed941
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/irq.h> 47#include <linux/io.h> 48#include <asm/byteorder.h> 49#include <linux/uaccess.h> 50#include <asm/unaligned.h> 51 52#include "ide-cd.h" 53 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 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; 286 287 /* get the IDE error register */ 288 err = ide_read_error(drive); 289 sense_key = err >> 4; 290 291 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, rq->cmd_type: 0x%x, err: 0x%x, " 292 "stat 0x%x", 293 rq->cmd[0], rq->cmd_type, err, stat); 294 295 if (rq->cmd_type == REQ_TYPE_SENSE) { 296 /* 297 * We got an error trying to get sense info from the drive 298 * (probably while trying to recover from a former error). 299 * Just give up. 300 */ 301 rq->cmd_flags |= REQ_FAILED; 302 return 2; 303 } 304 305 /* if we have an error, pass CHECK_CONDITION as the SCSI status byte */ 306 if (rq->cmd_type == REQ_TYPE_BLOCK_PC && !rq->errors) 307 rq->errors = SAM_STAT_CHECK_CONDITION; 308 309 if (blk_noretry_request(rq)) 310 do_end_request = 1; 311 312 switch (sense_key) { 313 case NOT_READY: 314 if (rq->cmd_type == REQ_TYPE_FS && rq_data_dir(rq) == WRITE) { 315 if (ide_cd_breathe(drive, rq)) 316 return 1; 317 } else { 318 cdrom_saw_media_change(drive); 319 320 if (rq->cmd_type == REQ_TYPE_FS && 321 !(rq->cmd_flags & REQ_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 (rq->cmd_type != REQ_TYPE_FS) 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 (!(rq->cmd_flags & REQ_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 (!(rq->cmd_flags & REQ_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 (!(rq->cmd_flags & REQ_QUIET)) 373 ide_dump_status(drive, "media error (blank)", 374 stat); 375 do_end_request = 1; 376 break; 377 default: 378 if (req->cmd_type != REQ_TYPE_FS) 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 (rq->cmd_type != REQ_TYPE_FS) { 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 hwif->rq = NULL; 409 return ide_queue_sense_rq(drive, rq) ? 2 : 1; 410 } else 411 return 2; 412} 413 414static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct ide_cmd *cmd) 415{ 416 struct request *rq = cmd->rq; 417 418 ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]); 419 420 /* 421 * Some of the trailing request sense fields are optional, 422 * and some drives don't send them. Sigh. 423 */ 424 if (rq->cmd[0] == GPCMD_REQUEST_SENSE && 425 cmd->nleft > 0 && cmd->nleft <= 5) 426 cmd->nleft = 0; 427} 428 429int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd, 430 int write, void *buffer, unsigned *bufflen, 431 struct request_sense *sense, int timeout, 432 unsigned int cmd_flags) 433{ 434 struct cdrom_info *info = drive->driver_data; 435 struct request_sense local_sense; 436 int retries = 10; 437 unsigned int flags = 0; 438 439 if (!sense) 440 sense = &local_sense; 441 442 ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, " 443 "cmd_flags: 0x%x", 444 cmd[0], write, timeout, cmd_flags); 445 446 /* start of retry loop */ 447 do { 448 struct request *rq; 449 int error; 450 451 rq = blk_get_request(drive->queue, write, __GFP_WAIT); 452 453 memcpy(rq->cmd, cmd, BLK_MAX_CDB); 454 rq->cmd_type = REQ_TYPE_ATA_PC; 455 rq->sense = sense; 456 rq->cmd_flags |= cmd_flags; 457 rq->timeout = timeout; 458 if (buffer) { 459 error = blk_rq_map_kern(drive->queue, rq, buffer, 460 *bufflen, GFP_NOIO); 461 if (error) { 462 blk_put_request(rq); 463 return error; 464 } 465 } 466 467 error = blk_execute_rq(drive->queue, info->disk, rq, 0); 468 469 if (buffer) 470 *bufflen = rq->resid_len; 471 472 flags = rq->cmd_flags; 473 blk_put_request(rq); 474 475 /* 476 * FIXME: we should probably abort/retry or something in case of 477 * failure. 478 */ 479 if (flags & REQ_FAILED) { 480 /* 481 * The request failed. Retry if it was due to a unit 482 * attention status (usually means media was changed). 483 */ 484 struct request_sense *reqbuf = sense; 485 486 if (reqbuf->sense_key == UNIT_ATTENTION) 487 cdrom_saw_media_change(drive); 488 else if (reqbuf->sense_key == NOT_READY && 489 reqbuf->asc == 4 && reqbuf->ascq != 4) { 490 /* 491 * The drive is in the process of loading 492 * a disk. Retry, but wait a little to give 493 * the drive time to complete the load. 494 */ 495 ssleep(2); 496 } else { 497 /* otherwise, don't retry */ 498 retries = 0; 499 } 500 --retries; 501 } 502 503 /* end of retry loop */ 504 } while ((flags & REQ_FAILED) && retries >= 0); 505 506 /* return an error if the command failed */ 507 return (flags & REQ_FAILED) ? -EIO : 0; 508} 509 510static void ide_cd_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd) 511{ 512 unsigned int nr_bytes = cmd->nbytes - cmd->nleft; 513 514 if (cmd->tf_flags & IDE_TFLAG_WRITE) 515 nr_bytes -= cmd->last_xfer_len; 516 517 if (nr_bytes > 0) 518 ide_complete_rq(drive, 0, nr_bytes); 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 ide_cd_error_cmd(drive, cmd); 684 685 /* make sure it's fully ended */ 686 if (rq->cmd_type != REQ_TYPE_FS) { 687 rq->resid_len -= cmd->nbytes - cmd->nleft; 688 if (uptodate == 0 && (cmd->tf_flags & IDE_TFLAG_WRITE)) 689 rq->resid_len += cmd->last_xfer_len; 690 } 691 692 ide_complete_rq(drive, uptodate ? 0 : -EIO, blk_rq_bytes(rq)); 693 694 if (sense && rc == 2) 695 ide_error(drive, "request sense failure", stat); 696 } 697 return ide_stopped; 698} 699 700static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq) 701{ 702 struct cdrom_info *cd = drive->driver_data; 703 struct request_queue *q = drive->queue; 704 int write = rq_data_dir(rq) == WRITE; 705 unsigned short sectors_per_frame = 706 queue_logical_block_size(q) >> SECTOR_BITS; 707 708 ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, rq->cmd_flags: 0x%x, " 709 "secs_per_frame: %u", 710 rq->cmd[0], rq->cmd_flags, sectors_per_frame); 711 712 if (write) { 713 /* disk has become write protected */ 714 if (get_disk_ro(cd->disk)) 715 return ide_stopped; 716 } else { 717 /* 718 * We may be retrying this request after an error. Fix up any 719 * weirdness which might be present in the request packet. 720 */ 721 q->prep_rq_fn(q, rq); 722 } 723 724 /* fs requests *must* be hardware frame aligned */ 725 if ((blk_rq_sectors(rq) & (sectors_per_frame - 1)) || 726 (blk_rq_pos(rq) & (sectors_per_frame - 1))) 727 return ide_stopped; 728 729 /* use DMA, if possible */ 730 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA); 731 732 if (write) 733 cd->devinfo.media_written = 1; 734 735 rq->timeout = ATAPI_WAIT_PC; 736 737 return ide_started; 738} 739 740static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq) 741{ 742 743 ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x", 744 rq->cmd[0], rq->cmd_type); 745 746 if (rq->cmd_type == REQ_TYPE_BLOCK_PC) 747 rq->cmd_flags |= REQ_QUIET; 748 else 749 rq->cmd_flags &= ~REQ_FAILED; 750 751 drive->dma = 0; 752 753 /* sg request */ 754 if (rq->bio) { 755 struct request_queue *q = drive->queue; 756 char *buf = bio_data(rq->bio); 757 unsigned int alignment; 758 759 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA); 760 761 /* 762 * check if dma is safe 763 * 764 * NOTE! The "len" and "addr" checks should possibly have 765 * separate masks. 766 */ 767 alignment = queue_dma_alignment(q) | q->dma_pad_mask; 768 if ((unsigned long)buf & alignment 769 || blk_rq_bytes(rq) & q->dma_pad_mask 770 || object_is_on_stack(buf)) 771 drive->dma = 0; 772 } 773} 774 775static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq, 776 sector_t block) 777{ 778 struct ide_cmd cmd; 779 int uptodate = 0, nsectors; 780 781 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu", 782 rq->cmd[0], (unsigned long long)block); 783 784 if (drive->debug_mask & IDE_DBG_RQ) 785 blk_dump_rq_flags(rq, "ide_cd_do_request"); 786 787 switch (rq->cmd_type) { 788 case REQ_TYPE_FS: 789 if (cdrom_start_rw(drive, rq) == ide_stopped) 790 goto out_end; 791 break; 792 case REQ_TYPE_SENSE: 793 case REQ_TYPE_BLOCK_PC: 794 case REQ_TYPE_ATA_PC: 795 if (!rq->timeout) 796 rq->timeout = ATAPI_WAIT_PC; 797 798 cdrom_do_block_pc(drive, rq); 799 break; 800 case REQ_TYPE_SPECIAL: 801 /* right now this can only be a reset... */ 802 uptodate = 1; 803 goto out_end; 804 default: 805 BUG(); 806 } 807 808 /* prepare sense request for this command */ 809 ide_prep_sense(drive, rq); 810 811 memset(&cmd, 0, sizeof(cmd)); 812 813 if (rq_data_dir(rq)) 814 cmd.tf_flags |= IDE_TFLAG_WRITE; 815 816 cmd.rq = rq; 817 818 if (rq->cmd_type == REQ_TYPE_FS || blk_rq_bytes(rq)) { 819 ide_init_sg_cmd(&cmd, blk_rq_bytes(rq)); 820 ide_map_sg(drive, &cmd); 821 } 822 823 return ide_issue_pc(drive, &cmd); 824out_end: 825 nsectors = blk_rq_sectors(rq); 826 827 if (nsectors == 0) 828 nsectors = 1; 829 830 ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9); 831 832 return ide_stopped; 833} 834 835/* 836 * Ioctl handling. 837 * 838 * Routines which queue packet commands take as a final argument a pointer to a 839 * request_sense struct. If execution of the command results in an error with a 840 * CHECK CONDITION status, this structure will be filled with the results of the 841 * subsequent request sense command. The pointer can also be NULL, in which case 842 * no sense information is returned. 843 */ 844static void msf_from_bcd(struct atapi_msf *msf) 845{ 846 msf->minute = bcd2bin(msf->minute); 847 msf->second = bcd2bin(msf->second); 848 msf->frame = bcd2bin(msf->frame); 849} 850 851int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense) 852{ 853 struct cdrom_info *info = drive->driver_data; 854 struct cdrom_device_info *cdi = &info->devinfo; 855 unsigned char cmd[BLK_MAX_CDB]; 856 857 ide_debug_log(IDE_DBG_FUNC, "enter"); 858 859 memset(cmd, 0, BLK_MAX_CDB); 860 cmd[0] = GPCMD_TEST_UNIT_READY; 861 862 /* 863 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs 864 * instead of supporting the LOAD_UNLOAD opcode. 865 */ 866 cmd[7] = cdi->sanyo_slot % 3; 867 868 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET); 869} 870 871static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity, 872 unsigned long *sectors_per_frame, 873 struct request_sense *sense) 874{ 875 struct { 876 __be32 lba; 877 __be32 blocklen; 878 } capbuf; 879 880 int stat; 881 unsigned char cmd[BLK_MAX_CDB]; 882 unsigned len = sizeof(capbuf); 883 u32 blocklen; 884 885 ide_debug_log(IDE_DBG_FUNC, "enter"); 886 887 memset(cmd, 0, BLK_MAX_CDB); 888 cmd[0] = GPCMD_READ_CDVD_CAPACITY; 889 890 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0, 891 REQ_QUIET); 892 if (stat) 893 return stat; 894 895 /* 896 * Sanity check the given block size, in so far as making 897 * sure the sectors_per_frame we give to the caller won't 898 * end up being bogus. 899 */ 900 blocklen = be32_to_cpu(capbuf.blocklen); 901 blocklen = (blocklen >> SECTOR_BITS) << SECTOR_BITS; 902 switch (blocklen) { 903 case 512: 904 case 1024: 905 case 2048: 906 case 4096: 907 break; 908 default: 909 printk_once(KERN_ERR PFX "%s: weird block size %u; " 910 "setting default block size to 2048\n", 911 drive->name, blocklen); 912 blocklen = 2048; 913 break; 914 } 915 916 *capacity = 1 + be32_to_cpu(capbuf.lba); 917 *sectors_per_frame = blocklen >> SECTOR_BITS; 918 919 ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu", 920 *capacity, *sectors_per_frame); 921 922 return 0; 923} 924 925static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag, 926 int format, char *buf, int buflen, 927 struct request_sense *sense) 928{ 929 unsigned char cmd[BLK_MAX_CDB]; 930 931 ide_debug_log(IDE_DBG_FUNC, "enter"); 932 933 memset(cmd, 0, BLK_MAX_CDB); 934 935 cmd[0] = GPCMD_READ_TOC_PMA_ATIP; 936 cmd[6] = trackno; 937 cmd[7] = (buflen >> 8); 938 cmd[8] = (buflen & 0xff); 939 cmd[9] = (format << 6); 940 941 if (msf_flag) 942 cmd[1] = 2; 943 944 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET); 945} 946 947/* Try to read the entire TOC for the disk into our internal buffer. */ 948int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense) 949{ 950 int stat, ntracks, i; 951 struct cdrom_info *info = drive->driver_data; 952 struct cdrom_device_info *cdi = &info->devinfo; 953 struct atapi_toc *toc = info->toc; 954 struct { 955 struct atapi_toc_header hdr; 956 struct atapi_toc_entry ent; 957 } ms_tmp; 958 long last_written; 959 unsigned long sectors_per_frame = SECTORS_PER_FRAME; 960 961 ide_debug_log(IDE_DBG_FUNC, "enter"); 962 963 if (toc == NULL) { 964 /* try to allocate space */ 965 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL); 966 if (toc == NULL) { 967 printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n", 968 drive->name); 969 return -ENOMEM; 970 } 971 info->toc = toc; 972 } 973 974 /* 975 * Check to see if the existing data is still valid. If it is, 976 * just return. 977 */ 978 (void) cdrom_check_status(drive, sense); 979 980 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID) 981 return 0; 982 983 /* try to get the total cdrom capacity and sector size */ 984 stat = cdrom_read_capacity(drive, &toc->capacity, §ors_per_frame, 985 sense); 986 if (stat) 987 toc->capacity = 0x1fffff; 988 989 set_capacity(info->disk, toc->capacity * sectors_per_frame); 990 /* save a private copy of the TOC capacity for error handling */ 991 drive->probed_capacity = toc->capacity * sectors_per_frame; 992 993 blk_queue_logical_block_size(drive->queue, 994 sectors_per_frame << SECTOR_BITS); 995 996 /* first read just the header, so we know how long the TOC is */ 997 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr, 998 sizeof(struct atapi_toc_header), sense); 999 if (stat) 1000 return stat; 1001 1002 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1003 toc->hdr.first_track = bcd2bin(toc->hdr.first_track); 1004 toc->hdr.last_track = bcd2bin(toc->hdr.last_track); 1005 } 1006 1007 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1; 1008 if (ntracks <= 0) 1009 return -EIO; 1010 if (ntracks > MAX_TRACKS) 1011 ntracks = MAX_TRACKS; 1012 1013 /* now read the whole schmeer */ 1014 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0, 1015 (char *)&toc->hdr, 1016 sizeof(struct atapi_toc_header) + 1017 (ntracks + 1) * 1018 sizeof(struct atapi_toc_entry), sense); 1019 1020 if (stat && toc->hdr.first_track > 1) { 1021 /* 1022 * Cds with CDI tracks only don't have any TOC entries, despite 1023 * of this the returned values are 1024 * first_track == last_track = number of CDI tracks + 1, 1025 * so that this case is indistinguishable from the same layout 1026 * plus an additional audio track. If we get an error for the 1027 * regular case, we assume a CDI without additional audio 1028 * tracks. In this case the readable TOC is empty (CDI tracks 1029 * are not included) and only holds the Leadout entry. 1030 * 1031 * Heiko Eißfeldt. 1032 */ 1033 ntracks = 0; 1034 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0, 1035 (char *)&toc->hdr, 1036 sizeof(struct atapi_toc_header) + 1037 (ntracks + 1) * 1038 sizeof(struct atapi_toc_entry), 1039 sense); 1040 if (stat) 1041 return stat; 1042 1043 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1044 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT); 1045 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT); 1046 } else { 1047 toc->hdr.first_track = CDROM_LEADOUT; 1048 toc->hdr.last_track = CDROM_LEADOUT; 1049 } 1050 } 1051 1052 if (stat) 1053 return stat; 1054 1055 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length); 1056 1057 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1058 toc->hdr.first_track = bcd2bin(toc->hdr.first_track); 1059 toc->hdr.last_track = bcd2bin(toc->hdr.last_track); 1060 } 1061 1062 for (i = 0; i <= ntracks; i++) { 1063 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) { 1064 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) 1065 toc->ent[i].track = bcd2bin(toc->ent[i].track); 1066 msf_from_bcd(&toc->ent[i].addr.msf); 1067 } 1068 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute, 1069 toc->ent[i].addr.msf.second, 1070 toc->ent[i].addr.msf.frame); 1071 } 1072 1073 if (toc->hdr.first_track != CDROM_LEADOUT) { 1074 /* read the multisession information */ 1075 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp, 1076 sizeof(ms_tmp), sense); 1077 if (stat) 1078 return stat; 1079 1080 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba); 1081 } else { 1082 ms_tmp.hdr.last_track = CDROM_LEADOUT; 1083 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track; 1084 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */ 1085 } 1086 1087 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) { 1088 /* re-read multisession information using MSF format */ 1089 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp, 1090 sizeof(ms_tmp), sense); 1091 if (stat) 1092 return stat; 1093 1094 msf_from_bcd(&ms_tmp.ent.addr.msf); 1095 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute, 1096 ms_tmp.ent.addr.msf.second, 1097 ms_tmp.ent.addr.msf.frame); 1098 } 1099 1100 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track); 1101 1102 /* now try to get the total cdrom capacity */ 1103 stat = cdrom_get_last_written(cdi, &last_written); 1104 if (!stat && (last_written > toc->capacity)) { 1105 toc->capacity = last_written; 1106 set_capacity(info->disk, toc->capacity * sectors_per_frame); 1107 drive->probed_capacity = toc->capacity * sectors_per_frame; 1108 } 1109 1110 /* Remember that we've read this stuff. */ 1111 drive->atapi_flags |= IDE_AFLAG_TOC_VALID; 1112 1113 return 0; 1114} 1115 1116int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf) 1117{ 1118 struct cdrom_info *info = drive->driver_data; 1119 struct cdrom_device_info *cdi = &info->devinfo; 1120 struct packet_command cgc; 1121 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE; 1122 1123 ide_debug_log(IDE_DBG_FUNC, "enter"); 1124 1125 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0) 1126 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE; 1127 1128 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN); 1129 do { 1130 /* we seem to get stat=0x01,err=0x00 the first time (??) */ 1131 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0); 1132 if (!stat) 1133 break; 1134 } while (--attempts); 1135 return stat; 1136} 1137 1138void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf) 1139{ 1140 struct cdrom_info *cd = drive->driver_data; 1141 u16 curspeed, maxspeed; 1142 1143 ide_debug_log(IDE_DBG_FUNC, "enter"); 1144 1145 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) { 1146 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]); 1147 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]); 1148 } else { 1149 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]); 1150 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]); 1151 } 1152 1153 ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u", 1154 curspeed, maxspeed); 1155 1156 cd->current_speed = DIV_ROUND_CLOSEST(curspeed, 176); 1157 cd->max_speed = DIV_ROUND_CLOSEST(maxspeed, 176); 1158} 1159 1160#define IDE_CD_CAPABILITIES \ 1161 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \ 1162 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \ 1163 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \ 1164 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \ 1165 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM) 1166 1167static struct cdrom_device_ops ide_cdrom_dops = { 1168 .open = ide_cdrom_open_real, 1169 .release = ide_cdrom_release_real, 1170 .drive_status = ide_cdrom_drive_status, 1171 .media_changed = ide_cdrom_check_media_change_real, 1172 .tray_move = ide_cdrom_tray_move, 1173 .lock_door = ide_cdrom_lock_door, 1174 .select_speed = ide_cdrom_select_speed, 1175 .get_last_session = ide_cdrom_get_last_session, 1176 .get_mcn = ide_cdrom_get_mcn, 1177 .reset = ide_cdrom_reset, 1178 .audio_ioctl = ide_cdrom_audio_ioctl, 1179 .capability = IDE_CD_CAPABILITIES, 1180 .generic_packet = ide_cdrom_packet, 1181}; 1182 1183static int ide_cdrom_register(ide_drive_t *drive, int nslots) 1184{ 1185 struct cdrom_info *info = drive->driver_data; 1186 struct cdrom_device_info *devinfo = &info->devinfo; 1187 1188 ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots); 1189 1190 devinfo->ops = &ide_cdrom_dops; 1191 devinfo->speed = info->current_speed; 1192 devinfo->capacity = nslots; 1193 devinfo->handle = drive; 1194 strcpy(devinfo->name, drive->name); 1195 1196 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT) 1197 devinfo->mask |= CDC_SELECT_SPEED; 1198 1199 devinfo->disk = info->disk; 1200 return register_cdrom(devinfo); 1201} 1202 1203static int ide_cdrom_probe_capabilities(ide_drive_t *drive) 1204{ 1205 struct cdrom_info *cd = drive->driver_data; 1206 struct cdrom_device_info *cdi = &cd->devinfo; 1207 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE]; 1208 mechtype_t mechtype; 1209 int nslots = 1; 1210 1211 ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx", 1212 drive->media, drive->atapi_flags); 1213 1214 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R | 1215 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO | 1216 CDC_MO_DRIVE | CDC_RAM); 1217 1218 if (drive->media == ide_optical) { 1219 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM); 1220 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n", 1221 drive->name); 1222 return nslots; 1223 } 1224 1225 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) { 1226 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT; 1227 cdi->mask &= ~CDC_PLAY_AUDIO; 1228 return nslots; 1229 } 1230 1231 /* 1232 * We have to cheat a little here. the packet will eventually be queued 1233 * with ide_cdrom_packet(), which extracts the drive from cdi->handle. 1234 * Since this device hasn't been registered with the Uniform layer yet, 1235 * it can't do this. Same goes for cdi->ops. 1236 */ 1237 cdi->handle = drive; 1238 cdi->ops = &ide_cdrom_dops; 1239 1240 if (ide_cdrom_get_capabilities(drive, buf)) 1241 return 0; 1242 1243 if ((buf[8 + 6] & 0x01) == 0) 1244 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING; 1245 if (buf[8 + 6] & 0x08) 1246 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT; 1247 if (buf[8 + 3] & 0x01) 1248 cdi->mask &= ~CDC_CD_R; 1249 if (buf[8 + 3] & 0x02) 1250 cdi->mask &= ~(CDC_CD_RW | CDC_RAM); 1251 if (buf[8 + 2] & 0x38) 1252 cdi->mask &= ~CDC_DVD; 1253 if (buf[8 + 3] & 0x20) 1254 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM); 1255 if (buf[8 + 3] & 0x10) 1256 cdi->mask &= ~CDC_DVD_R; 1257 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK)) 1258 cdi->mask &= ~CDC_PLAY_AUDIO; 1259 1260 mechtype = buf[8 + 6] >> 5; 1261 if (mechtype == mechtype_caddy || 1262 mechtype == mechtype_popup || 1263 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE)) 1264 cdi->mask |= CDC_CLOSE_TRAY; 1265 1266 if (cdi->sanyo_slot > 0) { 1267 cdi->mask &= ~CDC_SELECT_DISC; 1268 nslots = 3; 1269 } else if (mechtype == mechtype_individual_changer || 1270 mechtype == mechtype_cartridge_changer) { 1271 nslots = cdrom_number_of_slots(cdi); 1272 if (nslots > 1) 1273 cdi->mask &= ~CDC_SELECT_DISC; 1274 } 1275 1276 ide_cdrom_update_speed(drive, buf); 1277 1278 printk(KERN_INFO PFX "%s: ATAPI", drive->name); 1279 1280 /* don't print speed if the drive reported 0 */ 1281 if (cd->max_speed) 1282 printk(KERN_CONT " %dX", cd->max_speed); 1283 1284 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM"); 1285 1286 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0) 1287 printk(KERN_CONT " DVD%s%s", 1288 (cdi->mask & CDC_DVD_R) ? "" : "-R", 1289 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM"); 1290 1291 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0) 1292 printk(KERN_CONT " CD%s%s", 1293 (cdi->mask & CDC_CD_R) ? "" : "-R", 1294 (cdi->mask & CDC_CD_RW) ? "" : "/RW"); 1295 1296 if ((cdi->mask & CDC_SELECT_DISC) == 0) 1297 printk(KERN_CONT " changer w/%d slots", nslots); 1298 else 1299 printk(KERN_CONT " drive"); 1300 1301 printk(KERN_CONT ", %dkB Cache\n", 1302 be16_to_cpup((__be16 *)&buf[8 + 12])); 1303 1304 return nslots; 1305} 1306 1307/* standard prep_rq_fn that builds 10 byte cmds */ 1308static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq) 1309{ 1310 int hard_sect = queue_logical_block_size(q); 1311 long block = (long)blk_rq_pos(rq) / (hard_sect >> 9); 1312 unsigned long blocks = blk_rq_sectors(rq) / (hard_sect >> 9); 1313 1314 memset(rq->cmd, 0, BLK_MAX_CDB); 1315 1316 if (rq_data_dir(rq) == READ) 1317 rq->cmd[0] = GPCMD_READ_10; 1318 else 1319 rq->cmd[0] = GPCMD_WRITE_10; 1320 1321 /* 1322 * fill in lba 1323 */ 1324 rq->cmd[2] = (block >> 24) & 0xff; 1325 rq->cmd[3] = (block >> 16) & 0xff; 1326 rq->cmd[4] = (block >> 8) & 0xff; 1327 rq->cmd[5] = block & 0xff; 1328 1329 /* 1330 * and transfer length 1331 */ 1332 rq->cmd[7] = (blocks >> 8) & 0xff; 1333 rq->cmd[8] = blocks & 0xff; 1334 rq->cmd_len = 10; 1335 return BLKPREP_OK; 1336} 1337 1338/* 1339 * Most of the SCSI commands are supported directly by ATAPI devices. 1340 * This transform handles the few exceptions. 1341 */ 1342static int ide_cdrom_prep_pc(struct request *rq) 1343{ 1344 u8 *c = rq->cmd; 1345 1346 /* transform 6-byte read/write commands to the 10-byte version */ 1347 if (c[0] == READ_6 || c[0] == WRITE_6) { 1348 c[8] = c[4]; 1349 c[5] = c[3]; 1350 c[4] = c[2]; 1351 c[3] = c[1] & 0x1f; 1352 c[2] = 0; 1353 c[1] &= 0xe0; 1354 c[0] += (READ_10 - READ_6); 1355 rq->cmd_len = 10; 1356 return BLKPREP_OK; 1357 } 1358 1359 /* 1360 * it's silly to pretend we understand 6-byte sense commands, just 1361 * reject with ILLEGAL_REQUEST and the caller should take the 1362 * appropriate action 1363 */ 1364 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) { 1365 rq->errors = ILLEGAL_REQUEST; 1366 return BLKPREP_KILL; 1367 } 1368 1369 return BLKPREP_OK; 1370} 1371 1372static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq) 1373{ 1374 if (rq->cmd_type == REQ_TYPE_FS) 1375 return ide_cdrom_prep_fs(q, rq); 1376 else if (rq->cmd_type == REQ_TYPE_BLOCK_PC) 1377 return ide_cdrom_prep_pc(rq); 1378 1379 return 0; 1380} 1381 1382struct cd_list_entry { 1383 const char *id_model; 1384 const char *id_firmware; 1385 unsigned int cd_flags; 1386}; 1387 1388#ifdef CONFIG_IDE_PROC_FS 1389static sector_t ide_cdrom_capacity(ide_drive_t *drive) 1390{ 1391 unsigned long capacity, sectors_per_frame; 1392 1393 if (cdrom_read_capacity(drive, &capacity, §ors_per_frame, NULL)) 1394 return 0; 1395 1396 return capacity * sectors_per_frame; 1397} 1398 1399static int idecd_capacity_proc_show(struct seq_file *m, void *v) 1400{ 1401 ide_drive_t *drive = m->private; 1402 1403 seq_printf(m, "%llu\n", (long long)ide_cdrom_capacity(drive)); 1404 return 0; 1405} 1406 1407static int idecd_capacity_proc_open(struct inode *inode, struct file *file) 1408{ 1409 return single_open(file, idecd_capacity_proc_show, PDE(inode)->data); 1410} 1411 1412static const struct file_operations idecd_capacity_proc_fops = { 1413 .owner = THIS_MODULE, 1414 .open = idecd_capacity_proc_open, 1415 .read = seq_read, 1416 .llseek = seq_lseek, 1417 .release = single_release, 1418}; 1419 1420static ide_proc_entry_t idecd_proc[] = { 1421 { "capacity", S_IFREG|S_IRUGO, &idecd_capacity_proc_fops }, 1422 {} 1423}; 1424 1425static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive) 1426{ 1427 return idecd_proc; 1428} 1429 1430static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive) 1431{ 1432 return NULL; 1433} 1434#endif 1435 1436static const struct cd_list_entry ide_cd_quirks_list[] = { 1437 /* SCR-3231 doesn't support the SET_CD_SPEED command. */ 1438 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT }, 1439 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */ 1440 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD | 1441 IDE_AFLAG_PRE_ATAPI12, }, 1442 /* Vertos 300, some versions of this drive like to talk BCD. */ 1443 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, }, 1444 /* Vertos 600 ESD. */ 1445 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, }, 1446 /* 1447 * Sanyo 3 CD changer uses a non-standard command for CD changing 1448 * (by default standard ATAPI support for CD changers is used). 1449 */ 1450 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD }, 1451 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD }, 1452 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD }, 1453 /* Stingray 8X CD-ROM. */ 1454 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 }, 1455 /* 1456 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length 1457 * mode sense page capabilities size, but older drives break. 1458 */ 1459 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE }, 1460 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE }, 1461 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */ 1462 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS }, 1463 /* 1464 * Some drives used by Apple don't advertise audio play 1465 * but they do support reading TOC & audio datas. 1466 */ 1467 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1468 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1469 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1470 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1471 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1472 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1473 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE }, 1474 { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE }, 1475 { NULL, NULL, 0 } 1476}; 1477 1478static unsigned int ide_cd_flags(u16 *id) 1479{ 1480 const struct cd_list_entry *cle = ide_cd_quirks_list; 1481 1482 while (cle->id_model) { 1483 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 && 1484 (cle->id_firmware == NULL || 1485 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware))) 1486 return cle->cd_flags; 1487 cle++; 1488 } 1489 1490 return 0; 1491} 1492 1493static int ide_cdrom_setup(ide_drive_t *drive) 1494{ 1495 struct cdrom_info *cd = drive->driver_data; 1496 struct cdrom_device_info *cdi = &cd->devinfo; 1497 struct request_queue *q = drive->queue; 1498 u16 *id = drive->id; 1499 char *fw_rev = (char *)&id[ATA_ID_FW_REV]; 1500 int nslots; 1501 1502 ide_debug_log(IDE_DBG_PROBE, "enter"); 1503 1504 blk_queue_prep_rq(q, ide_cdrom_prep_fn); 1505 blk_queue_dma_alignment(q, 31); 1506 blk_queue_update_dma_pad(q, 15); 1507 1508 q->unplug_delay = max((1 * HZ) / 1000, 1); 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 = ide_cd_get(bdev->bd_disk); 1594 int rc = -ENOMEM; 1595 1596 if (!info) 1597 return -ENXIO; 1598 1599 rc = cdrom_open(&info->devinfo, bdev, mode); 1600 1601 if (rc < 0) 1602 ide_cd_put(info); 1603 1604 return rc; 1605} 1606 1607static int idecd_release(struct gendisk *disk, fmode_t mode) 1608{ 1609 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 1610 1611 cdrom_release(&info->devinfo, mode); 1612 1613 ide_cd_put(info); 1614 1615 return 0; 1616} 1617 1618static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg) 1619{ 1620 struct packet_command cgc; 1621 char buffer[16]; 1622 int stat; 1623 char spindown; 1624 1625 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char))) 1626 return -EFAULT; 1627 1628 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN); 1629 1630 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0); 1631 if (stat) 1632 return stat; 1633 1634 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f); 1635 return cdrom_mode_select(cdi, &cgc); 1636} 1637 1638static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg) 1639{ 1640 struct packet_command cgc; 1641 char buffer[16]; 1642 int stat; 1643 char spindown; 1644 1645 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN); 1646 1647 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0); 1648 if (stat) 1649 return stat; 1650 1651 spindown = buffer[11] & 0x0f; 1652 if (copy_to_user((void __user *)arg, &spindown, sizeof(char))) 1653 return -EFAULT; 1654 return 0; 1655} 1656 1657static int idecd_ioctl(struct block_device *bdev, fmode_t mode, 1658 unsigned int cmd, unsigned long arg) 1659{ 1660 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info); 1661 int err; 1662 1663 switch (cmd) { 1664 case CDROMSETSPINDOWN: 1665 return idecd_set_spindown(&info->devinfo, arg); 1666 case CDROMGETSPINDOWN: 1667 return idecd_get_spindown(&info->devinfo, arg); 1668 default: 1669 break; 1670 } 1671 1672 err = generic_ide_ioctl(info->drive, bdev, cmd, arg); 1673 if (err == -EINVAL) 1674 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg); 1675 1676 return err; 1677} 1678 1679static int idecd_media_changed(struct gendisk *disk) 1680{ 1681 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 1682 return cdrom_media_changed(&info->devinfo); 1683} 1684 1685static int idecd_revalidate_disk(struct gendisk *disk) 1686{ 1687 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 1688 struct request_sense sense; 1689 1690 ide_cd_read_toc(info->drive, &sense); 1691 1692 return 0; 1693} 1694 1695static const struct block_device_operations idecd_ops = { 1696 .owner = THIS_MODULE, 1697 .open = idecd_open, 1698 .release = idecd_release, 1699 .locked_ioctl = idecd_ioctl, 1700 .media_changed = idecd_media_changed, 1701 .revalidate_disk = idecd_revalidate_disk 1702}; 1703 1704/* module options */ 1705static unsigned long debug_mask; 1706module_param(debug_mask, ulong, 0644); 1707 1708MODULE_DESCRIPTION("ATAPI CD-ROM Driver"); 1709 1710static int ide_cd_probe(ide_drive_t *drive) 1711{ 1712 struct cdrom_info *info; 1713 struct gendisk *g; 1714 struct request_sense sense; 1715 1716 ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x", 1717 drive->driver_req, drive->media); 1718 1719 if (!strstr("ide-cdrom", drive->driver_req)) 1720 goto failed; 1721 1722 if (drive->media != ide_cdrom && drive->media != ide_optical) 1723 goto failed; 1724 1725 drive->debug_mask = debug_mask; 1726 drive->irq_handler = cdrom_newpc_intr; 1727 1728 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL); 1729 if (info == NULL) { 1730 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n", 1731 drive->name); 1732 goto failed; 1733 } 1734 1735 g = alloc_disk(1 << PARTN_BITS); 1736 if (!g) 1737 goto out_free_cd; 1738 1739 ide_init_disk(g, drive); 1740 1741 info->dev.parent = &drive->gendev; 1742 info->dev.release = ide_cd_release; 1743 dev_set_name(&info->dev, dev_name(&drive->gendev)); 1744 1745 if (device_register(&info->dev)) 1746 goto out_free_disk; 1747 1748 info->drive = drive; 1749 info->driver = &ide_cdrom_driver; 1750 info->disk = g; 1751 1752 g->private_data = &info->driver; 1753 1754 drive->driver_data = info; 1755 1756 g->minors = 1; 1757 g->driverfs_dev = &drive->gendev; 1758 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE; 1759 if (ide_cdrom_setup(drive)) { 1760 put_device(&info->dev); 1761 goto failed; 1762 } 1763 1764 ide_cd_read_toc(drive, &sense); 1765 g->fops = &idecd_ops; 1766 g->flags |= GENHD_FL_REMOVABLE; 1767 add_disk(g); 1768 return 0; 1769 1770out_free_disk: 1771 put_disk(g); 1772out_free_cd: 1773 kfree(info); 1774failed: 1775 return -ENODEV; 1776} 1777 1778static void __exit ide_cdrom_exit(void) 1779{ 1780 driver_unregister(&ide_cdrom_driver.gen_driver); 1781} 1782 1783static int __init ide_cdrom_init(void) 1784{ 1785 printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n"); 1786 return driver_register(&ide_cdrom_driver.gen_driver); 1787} 1788 1789MODULE_ALIAS("ide:*m-cdrom*"); 1790MODULE_ALIAS("ide-cd"); 1791module_init(ide_cdrom_init); 1792module_exit(ide_cdrom_exit); 1793MODULE_LICENSE("GPL"); 1794