ide-cd.c revision 239f7e25346e22c4a94bde004d845e7397947c01
1/* 2 * ATAPI CD-ROM driver. 3 * 4 * Copyright (C) 1994-1996 Scott Snyder <snyder@fnald0.fnal.gov> 5 * Copyright (C) 1996-1998 Erik Andersen <andersee@debian.org> 6 * Copyright (C) 1998-2000 Jens Axboe <axboe@suse.de> 7 * Copyright (C) 2005, 2007-2009 Bartlomiej Zolnierkiewicz 8 * 9 * May be copied or modified under the terms of the GNU General Public 10 * License. See linux/COPYING for more information. 11 * 12 * See Documentation/cdrom/ide-cd for usage information. 13 * 14 * Suggestions are welcome. Patches that work are more welcome though. ;-) 15 * 16 * Documentation: 17 * Mt. Fuji (SFF8090 version 4) and ATAPI (SFF-8020i rev 2.6) standards. 18 * 19 * For historical changelog please see: 20 * Documentation/ide/ChangeLog.ide-cd.1994-2004 21 */ 22 23#define DRV_NAME "ide-cd" 24#define PFX DRV_NAME ": " 25 26#define IDECD_VERSION "5.00" 27 28#include <linux/module.h> 29#include <linux/types.h> 30#include <linux/kernel.h> 31#include <linux/delay.h> 32#include <linux/timer.h> 33#include <linux/slab.h> 34#include <linux/interrupt.h> 35#include <linux/errno.h> 36#include <linux/cdrom.h> 37#include <linux/ide.h> 38#include <linux/completion.h> 39#include <linux/mutex.h> 40#include <linux/bcd.h> 41 42/* For SCSI -> ATAPI command conversion */ 43#include <scsi/scsi.h> 44 45#include <linux/irq.h> 46#include <linux/io.h> 47#include <asm/byteorder.h> 48#include <linux/uaccess.h> 49#include <asm/unaligned.h> 50 51#include "ide-cd.h" 52 53static DEFINE_MUTEX(idecd_ref_mutex); 54 55static void ide_cd_release(struct device *); 56 57static struct cdrom_info *ide_cd_get(struct gendisk *disk) 58{ 59 struct cdrom_info *cd = NULL; 60 61 mutex_lock(&idecd_ref_mutex); 62 cd = ide_drv_g(disk, cdrom_info); 63 if (cd) { 64 if (ide_device_get(cd->drive)) 65 cd = NULL; 66 else 67 get_device(&cd->dev); 68 69 } 70 mutex_unlock(&idecd_ref_mutex); 71 return cd; 72} 73 74static void ide_cd_put(struct cdrom_info *cd) 75{ 76 ide_drive_t *drive = cd->drive; 77 78 mutex_lock(&idecd_ref_mutex); 79 put_device(&cd->dev); 80 ide_device_put(drive); 81 mutex_unlock(&idecd_ref_mutex); 82} 83 84/* 85 * Generic packet command support and error handling routines. 86 */ 87 88/* Mark that we've seen a media change and invalidate our internal buffers. */ 89static void cdrom_saw_media_change(ide_drive_t *drive) 90{ 91 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED; 92 drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID; 93} 94 95static int cdrom_log_sense(ide_drive_t *drive, struct request *rq) 96{ 97 struct request_sense *sense = &drive->sense_data; 98 int log = 0; 99 100 if (!sense || !rq || (rq->cmd_flags & REQ_QUIET)) 101 return 0; 102 103 ide_debug_log(IDE_DBG_SENSE, "sense_key: 0x%x", sense->sense_key); 104 105 switch (sense->sense_key) { 106 case NO_SENSE: 107 case RECOVERED_ERROR: 108 break; 109 case NOT_READY: 110 /* 111 * don't care about tray state messages for e.g. capacity 112 * commands or in-progress or becoming ready 113 */ 114 if (sense->asc == 0x3a || sense->asc == 0x04) 115 break; 116 log = 1; 117 break; 118 case ILLEGAL_REQUEST: 119 /* 120 * don't log START_STOP unit with LoEj set, since we cannot 121 * reliably check if drive can auto-close 122 */ 123 if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24) 124 break; 125 log = 1; 126 break; 127 case UNIT_ATTENTION: 128 /* 129 * Make good and sure we've seen this potential media change. 130 * Some drives (i.e. Creative) fail to present the correct sense 131 * key in the error register. 132 */ 133 cdrom_saw_media_change(drive); 134 break; 135 default: 136 log = 1; 137 break; 138 } 139 return log; 140} 141 142static void cdrom_analyze_sense_data(ide_drive_t *drive, 143 struct request *failed_command) 144{ 145 struct request_sense *sense = &drive->sense_data; 146 struct cdrom_info *info = drive->driver_data; 147 unsigned long sector; 148 unsigned long bio_sectors; 149 150 ide_debug_log(IDE_DBG_SENSE, "error_code: 0x%x, sense_key: 0x%x", 151 sense->error_code, sense->sense_key); 152 153 if (failed_command) 154 ide_debug_log(IDE_DBG_SENSE, "failed cmd: 0x%x", 155 failed_command->cmd[0]); 156 157 if (!cdrom_log_sense(drive, failed_command)) 158 return; 159 160 /* 161 * If a read toc is executed for a CD-R or CD-RW medium where the first 162 * toc has not been recorded yet, it will fail with 05/24/00 (which is a 163 * confusing error) 164 */ 165 if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP) 166 if (sense->sense_key == 0x05 && sense->asc == 0x24) 167 return; 168 169 /* current error */ 170 if (sense->error_code == 0x70) { 171 switch (sense->sense_key) { 172 case MEDIUM_ERROR: 173 case VOLUME_OVERFLOW: 174 case ILLEGAL_REQUEST: 175 if (!sense->valid) 176 break; 177 if (failed_command == NULL || 178 !blk_fs_request(failed_command)) 179 break; 180 sector = (sense->information[0] << 24) | 181 (sense->information[1] << 16) | 182 (sense->information[2] << 8) | 183 (sense->information[3]); 184 185 if (drive->queue->hardsect_size == 2048) 186 /* device sector size is 2K */ 187 sector <<= 2; 188 189 bio_sectors = max(bio_sectors(failed_command->bio), 4U); 190 sector &= ~(bio_sectors - 1); 191 192 /* 193 * The SCSI specification allows for the value 194 * returned by READ CAPACITY to be up to 75 2K 195 * sectors past the last readable block. 196 * Therefore, if we hit a medium error within the 197 * last 75 2K sectors, we decrease the saved size 198 * value. 199 */ 200 if (sector < get_capacity(info->disk) && 201 drive->probed_capacity - sector < 4 * 75) 202 set_capacity(info->disk, sector); 203 } 204 } 205 206 ide_cd_log_error(drive->name, failed_command, sense); 207} 208 209static void ide_cd_complete_failed_rq(ide_drive_t *drive, struct request *rq) 210{ 211 /* 212 * For REQ_TYPE_SENSE, "rq->special" points to the original 213 * failed request. Also, the sense data should be read 214 * directly from rq which might be different from the original 215 * sense buffer if it got copied during mapping. 216 */ 217 struct request *failed = (struct request *)rq->special; 218 void *sense = bio_data(rq->bio); 219 220 if (failed) { 221 if (failed->sense) { 222 /* 223 * Sense is always read into drive->sense_data. 224 * Copy back if the failed request has its 225 * sense pointer set. 226 */ 227 memcpy(failed->sense, sense, 18); 228 failed->sense_len = rq->sense_len; 229 } 230 cdrom_analyze_sense_data(drive, failed); 231 232 if (ide_end_rq(drive, failed, -EIO, blk_rq_bytes(failed))) 233 BUG(); 234 } else 235 cdrom_analyze_sense_data(drive, NULL); 236} 237 238 239/* 240 * Allow the drive 5 seconds to recover; some devices will return NOT_READY 241 * while flushing data from cache. 242 * 243 * returns: 0 failed (write timeout expired) 244 * 1 success 245 */ 246static int ide_cd_breathe(ide_drive_t *drive, struct request *rq) 247{ 248 249 struct cdrom_info *info = drive->driver_data; 250 251 if (!rq->errors) 252 info->write_timeout = jiffies + ATAPI_WAIT_WRITE_BUSY; 253 254 rq->errors = 1; 255 256 if (time_after(jiffies, info->write_timeout)) 257 return 0; 258 else { 259 struct request_queue *q = drive->queue; 260 unsigned long flags; 261 262 /* 263 * take a breather relying on the unplug timer to kick us again 264 */ 265 266 spin_lock_irqsave(q->queue_lock, flags); 267 blk_plug_device(q); 268 spin_unlock_irqrestore(q->queue_lock, flags); 269 270 return 1; 271 } 272} 273 274/** 275 * Returns: 276 * 0: if the request should be continued. 277 * 1: if the request will be going through error recovery. 278 * 2: if the request should be ended. 279 */ 280static int cdrom_decode_status(ide_drive_t *drive, u8 stat) 281{ 282 ide_hwif_t *hwif = drive->hwif; 283 struct request *rq = hwif->rq; 284 int err, sense_key, do_end_request = 0; 285 u8 quiet = rq->cmd_flags & REQ_QUIET; 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 (blk_sense_request(rq)) { 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 (blk_pc_request(rq) && !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 (blk_fs_request(rq) && 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 (blk_fs_request(rq) && !quiet) 321 printk(KERN_ERR PFX "%s: tray open\n", 322 drive->name); 323 } 324 do_end_request = 1; 325 break; 326 case UNIT_ATTENTION: 327 cdrom_saw_media_change(drive); 328 329 if (blk_fs_request(rq) == 0) 330 return 0; 331 332 /* 333 * Arrange to retry the request but be sure to give up if we've 334 * retried too many times. 335 */ 336 if (++rq->errors > ERROR_MAX) 337 do_end_request = 1; 338 break; 339 case ILLEGAL_REQUEST: 340 /* 341 * Don't print error message for this condition -- SFF8090i 342 * indicates that 5/24/00 is the correct response to a request 343 * to close the tray if the drive doesn't have that capability. 344 * 345 * cdrom_log_sense() knows this! 346 */ 347 if (rq->cmd[0] == GPCMD_START_STOP_UNIT) 348 break; 349 /* fall-through */ 350 case DATA_PROTECT: 351 /* 352 * No point in retrying after an illegal request or data 353 * protect error. 354 */ 355 if (!quiet) 356 ide_dump_status(drive, "command error", stat); 357 do_end_request = 1; 358 break; 359 case MEDIUM_ERROR: 360 /* 361 * No point in re-trying a zillion times on a bad sector. 362 * If we got here the error is not correctable. 363 */ 364 if (!quiet) 365 ide_dump_status(drive, "media error " 366 "(bad sector)", stat); 367 do_end_request = 1; 368 break; 369 case BLANK_CHECK: 370 /* disk appears blank? */ 371 if (!quiet) 372 ide_dump_status(drive, "media error (blank)", 373 stat); 374 do_end_request = 1; 375 break; 376 default: 377 if (blk_fs_request(rq) == 0) 378 break; 379 if (err & ~ATA_ABORTED) { 380 /* go to the default handler for other errors */ 381 ide_error(drive, "cdrom_decode_status", stat); 382 return 1; 383 } else if (++rq->errors > ERROR_MAX) 384 /* we've racked up too many retries, abort */ 385 do_end_request = 1; 386 } 387 388 if (blk_fs_request(rq) == 0) { 389 rq->cmd_flags |= REQ_FAILED; 390 do_end_request = 1; 391 } 392 393 /* 394 * End a request through request sense analysis when we have sense data. 395 * We need this in order to perform end of media processing. 396 */ 397 if (do_end_request) 398 goto end_request; 399 400 /* if we got a CHECK_CONDITION status, queue a request sense command */ 401 if (stat & ATA_ERR) 402 return ide_queue_sense_rq(drive, NULL) ? 2 : 1; 403 return 1; 404 405end_request: 406 if (stat & ATA_ERR) { 407 hwif->rq = NULL; 408 return ide_queue_sense_rq(drive, rq) ? 2 : 1; 409 } else 410 return 2; 411} 412 413/* 414 * Check the contents of the interrupt reason register from the cdrom 415 * and attempt to recover if there are problems. Returns 0 if everything's 416 * ok; nonzero if the request has been terminated. 417 */ 418static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq, 419 int len, int ireason, int rw) 420{ 421 ide_hwif_t *hwif = drive->hwif; 422 423 ide_debug_log(IDE_DBG_FUNC, "ireason: 0x%x, rw: 0x%x", ireason, rw); 424 425 /* 426 * ireason == 0: the drive wants to receive data from us 427 * ireason == 2: the drive is expecting to transfer data to us 428 */ 429 if (ireason == (!rw << 1)) 430 return 0; 431 else if (ireason == (rw << 1)) { 432 433 /* whoops... */ 434 printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n", 435 drive->name, __func__); 436 437 ide_pad_transfer(drive, rw, len); 438 } else if (rw == 0 && ireason == 1) { 439 /* 440 * Some drives (ASUS) seem to tell us that status info is 441 * available. Just get it and ignore. 442 */ 443 (void)hwif->tp_ops->read_status(hwif); 444 return 0; 445 } else { 446 /* drive wants a command packet, or invalid ireason... */ 447 printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n", 448 drive->name, __func__, ireason); 449 } 450 451 if (rq->cmd_type == REQ_TYPE_ATA_PC) 452 rq->cmd_flags |= REQ_FAILED; 453 454 return -1; 455} 456 457static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct ide_cmd *cmd) 458{ 459 struct request *rq = cmd->rq; 460 461 ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]); 462 463 /* 464 * Some of the trailing request sense fields are optional, 465 * and some drives don't send them. Sigh. 466 */ 467 if (rq->cmd[0] == GPCMD_REQUEST_SENSE && 468 cmd->nleft > 0 && cmd->nleft <= 5) 469 cmd->nleft = 0; 470} 471 472int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd, 473 int write, void *buffer, unsigned *bufflen, 474 struct request_sense *sense, int timeout, 475 unsigned int cmd_flags) 476{ 477 struct cdrom_info *info = drive->driver_data; 478 struct request_sense local_sense; 479 int retries = 10; 480 unsigned int flags = 0; 481 482 if (!sense) 483 sense = &local_sense; 484 485 ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, " 486 "cmd_flags: 0x%x", 487 cmd[0], write, timeout, cmd_flags); 488 489 /* start of retry loop */ 490 do { 491 struct request *rq; 492 int error; 493 494 rq = blk_get_request(drive->queue, write, __GFP_WAIT); 495 496 memcpy(rq->cmd, cmd, BLK_MAX_CDB); 497 rq->cmd_type = REQ_TYPE_ATA_PC; 498 rq->sense = sense; 499 rq->cmd_flags |= cmd_flags; 500 rq->timeout = timeout; 501 if (buffer) { 502 error = blk_rq_map_kern(drive->queue, rq, buffer, 503 *bufflen, GFP_NOIO); 504 if (error) { 505 blk_put_request(rq); 506 return error; 507 } 508 } 509 510 error = blk_execute_rq(drive->queue, info->disk, rq, 0); 511 512 if (buffer) 513 *bufflen = rq->resid_len; 514 515 flags = rq->cmd_flags; 516 blk_put_request(rq); 517 518 /* 519 * FIXME: we should probably abort/retry or something in case of 520 * failure. 521 */ 522 if (flags & REQ_FAILED) { 523 /* 524 * The request failed. Retry if it was due to a unit 525 * attention status (usually means media was changed). 526 */ 527 struct request_sense *reqbuf = sense; 528 529 if (reqbuf->sense_key == UNIT_ATTENTION) 530 cdrom_saw_media_change(drive); 531 else if (reqbuf->sense_key == NOT_READY && 532 reqbuf->asc == 4 && reqbuf->ascq != 4) { 533 /* 534 * The drive is in the process of loading 535 * a disk. Retry, but wait a little to give 536 * the drive time to complete the load. 537 */ 538 ssleep(2); 539 } else { 540 /* otherwise, don't retry */ 541 retries = 0; 542 } 543 --retries; 544 } 545 546 /* end of retry loop */ 547 } while ((flags & REQ_FAILED) && retries >= 0); 548 549 /* return an error if the command failed */ 550 return (flags & REQ_FAILED) ? -EIO : 0; 551} 552 553static void ide_cd_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd) 554{ 555 unsigned int nr_bytes = cmd->nbytes - cmd->nleft; 556 557 if (cmd->tf_flags & IDE_TFLAG_WRITE) 558 nr_bytes -= cmd->last_xfer_len; 559 560 if (nr_bytes > 0) 561 ide_complete_rq(drive, 0, nr_bytes); 562} 563 564static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive) 565{ 566 ide_hwif_t *hwif = drive->hwif; 567 struct ide_cmd *cmd = &hwif->cmd; 568 struct request *rq = hwif->rq; 569 ide_expiry_t *expiry = NULL; 570 int dma_error = 0, dma, thislen, uptodate = 0; 571 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc = 0; 572 int sense = blk_sense_request(rq); 573 unsigned int timeout; 574 u16 len; 575 u8 ireason, stat; 576 577 ide_debug_log(IDE_DBG_PC, "cmd: 0x%x, write: 0x%x", rq->cmd[0], write); 578 579 /* check for errors */ 580 dma = drive->dma; 581 if (dma) { 582 drive->dma = 0; 583 drive->waiting_for_dma = 0; 584 dma_error = hwif->dma_ops->dma_end(drive); 585 ide_dma_unmap_sg(drive, cmd); 586 if (dma_error) { 587 printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name, 588 write ? "write" : "read"); 589 ide_dma_off(drive); 590 } 591 } 592 593 /* check status */ 594 stat = hwif->tp_ops->read_status(hwif); 595 596 if (!OK_STAT(stat, 0, BAD_R_STAT)) { 597 rc = cdrom_decode_status(drive, stat); 598 if (rc) { 599 if (rc == 2) 600 goto out_end; 601 return ide_stopped; 602 } 603 } 604 605 /* using dma, transfer is complete now */ 606 if (dma) { 607 if (dma_error) 608 return ide_error(drive, "dma error", stat); 609 uptodate = 1; 610 goto out_end; 611 } 612 613 ide_read_bcount_and_ireason(drive, &len, &ireason); 614 615 thislen = blk_fs_request(rq) ? len : cmd->nleft; 616 if (thislen > len) 617 thislen = len; 618 619 ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d", 620 stat, thislen); 621 622 /* If DRQ is clear, the command has completed. */ 623 if ((stat & ATA_DRQ) == 0) { 624 if (blk_fs_request(rq)) { 625 /* 626 * If we're not done reading/writing, complain. 627 * Otherwise, complete the command normally. 628 */ 629 uptodate = 1; 630 if (cmd->nleft > 0) { 631 printk(KERN_ERR PFX "%s: %s: data underrun " 632 "(%u bytes)\n", drive->name, __func__, 633 cmd->nleft); 634 if (!write) 635 rq->cmd_flags |= REQ_FAILED; 636 uptodate = 0; 637 } 638 } else if (!blk_pc_request(rq)) { 639 ide_cd_request_sense_fixup(drive, cmd); 640 /* complain if we still have data left to transfer */ 641 uptodate = cmd->nleft ? 0 : 1; 642 if (uptodate == 0) 643 rq->cmd_flags |= REQ_FAILED; 644 } 645 goto out_end; 646 } 647 648 /* check which way to transfer data */ 649 rc = ide_cd_check_ireason(drive, rq, len, ireason, write); 650 if (rc) 651 goto out_end; 652 653 cmd->last_xfer_len = 0; 654 655 ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, " 656 "ireason: 0x%x", 657 rq->cmd_type, ireason); 658 659 /* transfer data */ 660 while (thislen > 0) { 661 int blen = min_t(int, thislen, cmd->nleft); 662 663 if (cmd->nleft == 0) 664 break; 665 666 ide_pio_bytes(drive, cmd, write, blen); 667 cmd->last_xfer_len += blen; 668 669 thislen -= blen; 670 len -= blen; 671 672 if (sense && write == 0) 673 rq->sense_len += blen; 674 } 675 676 /* pad, if necessary */ 677 if (len > 0) { 678 if (blk_fs_request(rq) == 0 || write == 0) 679 ide_pad_transfer(drive, write, len); 680 else { 681 printk(KERN_ERR PFX "%s: confused, missing data\n", 682 drive->name); 683 blk_dump_rq_flags(rq, "cdrom_newpc_intr"); 684 } 685 } 686 687 if (blk_pc_request(rq)) { 688 timeout = rq->timeout; 689 } else { 690 timeout = ATAPI_WAIT_PC; 691 if (!blk_fs_request(rq)) 692 expiry = ide_cd_expiry; 693 } 694 695 hwif->expiry = expiry; 696 ide_set_handler(drive, cdrom_newpc_intr, timeout); 697 return ide_started; 698 699out_end: 700 if (blk_pc_request(rq) && rc == 0) { 701 blk_end_request_all(rq, 0); 702 hwif->rq = NULL; 703 } else { 704 if (sense && uptodate) 705 ide_cd_complete_failed_rq(drive, rq); 706 707 if (blk_fs_request(rq)) { 708 if (cmd->nleft == 0) 709 uptodate = 1; 710 } else { 711 if (uptodate <= 0 && rq->errors == 0) 712 rq->errors = -EIO; 713 } 714 715 if (uptodate == 0) 716 ide_cd_error_cmd(drive, cmd); 717 718 /* make sure it's fully ended */ 719 if (blk_fs_request(rq) == 0) { 720 rq->resid_len = blk_rq_bytes(rq) - 721 (cmd->nbytes - cmd->nleft); 722 if (uptodate == 0 && (cmd->tf_flags & IDE_TFLAG_WRITE)) 723 rq->resid_len += cmd->last_xfer_len; 724 } 725 726 ide_complete_rq(drive, uptodate ? 0 : -EIO, blk_rq_bytes(rq)); 727 728 if (sense && rc == 2) 729 ide_error(drive, "request sense failure", stat); 730 } 731 return ide_stopped; 732} 733 734static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq) 735{ 736 struct cdrom_info *cd = drive->driver_data; 737 struct request_queue *q = drive->queue; 738 int write = rq_data_dir(rq) == WRITE; 739 unsigned short sectors_per_frame = 740 queue_hardsect_size(q) >> SECTOR_BITS; 741 742 ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, rq->cmd_flags: 0x%x, " 743 "secs_per_frame: %u", 744 rq->cmd[0], rq->cmd_flags, sectors_per_frame); 745 746 if (write) { 747 /* disk has become write protected */ 748 if (get_disk_ro(cd->disk)) 749 return ide_stopped; 750 } else { 751 /* 752 * We may be retrying this request after an error. Fix up any 753 * weirdness which might be present in the request packet. 754 */ 755 q->prep_rq_fn(q, rq); 756 } 757 758 /* fs requests *must* be hardware frame aligned */ 759 if ((blk_rq_sectors(rq) & (sectors_per_frame - 1)) || 760 (blk_rq_pos(rq) & (sectors_per_frame - 1))) 761 return ide_stopped; 762 763 /* use DMA, if possible */ 764 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA); 765 766 if (write) 767 cd->devinfo.media_written = 1; 768 769 rq->timeout = ATAPI_WAIT_PC; 770 771 return ide_started; 772} 773 774static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq) 775{ 776 777 ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x", 778 rq->cmd[0], rq->cmd_type); 779 780 if (blk_pc_request(rq)) 781 rq->cmd_flags |= REQ_QUIET; 782 else 783 rq->cmd_flags &= ~REQ_FAILED; 784 785 drive->dma = 0; 786 787 /* sg request */ 788 if (rq->bio) { 789 struct request_queue *q = drive->queue; 790 char *buf = bio_data(rq->bio); 791 unsigned int alignment; 792 793 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA); 794 795 /* 796 * check if dma is safe 797 * 798 * NOTE! The "len" and "addr" checks should possibly have 799 * separate masks. 800 */ 801 alignment = queue_dma_alignment(q) | q->dma_pad_mask; 802 if ((unsigned long)buf & alignment 803 || blk_rq_bytes(rq) & q->dma_pad_mask 804 || object_is_on_stack(buf)) 805 drive->dma = 0; 806 } 807} 808 809static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq, 810 sector_t block) 811{ 812 struct ide_cmd cmd; 813 int uptodate = 0, nsectors; 814 815 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu", 816 rq->cmd[0], (unsigned long long)block); 817 818 if (drive->debug_mask & IDE_DBG_RQ) 819 blk_dump_rq_flags(rq, "ide_cd_do_request"); 820 821 if (blk_fs_request(rq)) { 822 if (cdrom_start_rw(drive, rq) == ide_stopped) 823 goto out_end; 824 } else if (blk_sense_request(rq) || blk_pc_request(rq) || 825 rq->cmd_type == REQ_TYPE_ATA_PC) { 826 if (!rq->timeout) 827 rq->timeout = ATAPI_WAIT_PC; 828 829 cdrom_do_block_pc(drive, rq); 830 } else if (blk_special_request(rq)) { 831 /* right now this can only be a reset... */ 832 uptodate = 1; 833 goto out_end; 834 } else { 835 blk_dump_rq_flags(rq, DRV_NAME " bad flags"); 836 if (rq->errors == 0) 837 rq->errors = -EIO; 838 goto out_end; 839 } 840 841 /* prepare sense request for this command */ 842 ide_prep_sense(drive, rq); 843 844 memset(&cmd, 0, sizeof(cmd)); 845 846 if (rq_data_dir(rq)) 847 cmd.tf_flags |= IDE_TFLAG_WRITE; 848 849 cmd.rq = rq; 850 851 if (blk_fs_request(rq) || blk_rq_bytes(rq)) { 852 ide_init_sg_cmd(&cmd, blk_rq_bytes(rq)); 853 ide_map_sg(drive, &cmd); 854 } 855 856 return ide_issue_pc(drive, &cmd); 857out_end: 858 nsectors = blk_rq_sectors(rq); 859 860 if (nsectors == 0) 861 nsectors = 1; 862 863 ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9); 864 865 return ide_stopped; 866} 867 868/* 869 * Ioctl handling. 870 * 871 * Routines which queue packet commands take as a final argument a pointer to a 872 * request_sense struct. If execution of the command results in an error with a 873 * CHECK CONDITION status, this structure will be filled with the results of the 874 * subsequent request sense command. The pointer can also be NULL, in which case 875 * no sense information is returned. 876 */ 877static void msf_from_bcd(struct atapi_msf *msf) 878{ 879 msf->minute = bcd2bin(msf->minute); 880 msf->second = bcd2bin(msf->second); 881 msf->frame = bcd2bin(msf->frame); 882} 883 884int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense) 885{ 886 struct cdrom_info *info = drive->driver_data; 887 struct cdrom_device_info *cdi = &info->devinfo; 888 unsigned char cmd[BLK_MAX_CDB]; 889 890 ide_debug_log(IDE_DBG_FUNC, "enter"); 891 892 memset(cmd, 0, BLK_MAX_CDB); 893 cmd[0] = GPCMD_TEST_UNIT_READY; 894 895 /* 896 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs 897 * instead of supporting the LOAD_UNLOAD opcode. 898 */ 899 cmd[7] = cdi->sanyo_slot % 3; 900 901 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET); 902} 903 904static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity, 905 unsigned long *sectors_per_frame, 906 struct request_sense *sense) 907{ 908 struct { 909 __be32 lba; 910 __be32 blocklen; 911 } capbuf; 912 913 int stat; 914 unsigned char cmd[BLK_MAX_CDB]; 915 unsigned len = sizeof(capbuf); 916 u32 blocklen; 917 918 ide_debug_log(IDE_DBG_FUNC, "enter"); 919 920 memset(cmd, 0, BLK_MAX_CDB); 921 cmd[0] = GPCMD_READ_CDVD_CAPACITY; 922 923 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0, 924 REQ_QUIET); 925 if (stat) 926 return stat; 927 928 /* 929 * Sanity check the given block size 930 */ 931 blocklen = be32_to_cpu(capbuf.blocklen); 932 switch (blocklen) { 933 case 512: 934 case 1024: 935 case 2048: 936 case 4096: 937 break; 938 default: 939 printk(KERN_ERR PFX "%s: weird block size %u\n", 940 drive->name, blocklen); 941 printk(KERN_ERR PFX "%s: default to 2kb block size\n", 942 drive->name); 943 blocklen = 2048; 944 break; 945 } 946 947 *capacity = 1 + be32_to_cpu(capbuf.lba); 948 *sectors_per_frame = blocklen >> SECTOR_BITS; 949 950 ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu", 951 *capacity, *sectors_per_frame); 952 953 return 0; 954} 955 956static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag, 957 int format, char *buf, int buflen, 958 struct request_sense *sense) 959{ 960 unsigned char cmd[BLK_MAX_CDB]; 961 962 ide_debug_log(IDE_DBG_FUNC, "enter"); 963 964 memset(cmd, 0, BLK_MAX_CDB); 965 966 cmd[0] = GPCMD_READ_TOC_PMA_ATIP; 967 cmd[6] = trackno; 968 cmd[7] = (buflen >> 8); 969 cmd[8] = (buflen & 0xff); 970 cmd[9] = (format << 6); 971 972 if (msf_flag) 973 cmd[1] = 2; 974 975 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET); 976} 977 978/* Try to read the entire TOC for the disk into our internal buffer. */ 979int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense) 980{ 981 int stat, ntracks, i; 982 struct cdrom_info *info = drive->driver_data; 983 struct cdrom_device_info *cdi = &info->devinfo; 984 struct atapi_toc *toc = info->toc; 985 struct { 986 struct atapi_toc_header hdr; 987 struct atapi_toc_entry ent; 988 } ms_tmp; 989 long last_written; 990 unsigned long sectors_per_frame = SECTORS_PER_FRAME; 991 992 ide_debug_log(IDE_DBG_FUNC, "enter"); 993 994 if (toc == NULL) { 995 /* try to allocate space */ 996 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL); 997 if (toc == NULL) { 998 printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n", 999 drive->name); 1000 return -ENOMEM; 1001 } 1002 info->toc = toc; 1003 } 1004 1005 /* 1006 * Check to see if the existing data is still valid. If it is, 1007 * just return. 1008 */ 1009 (void) cdrom_check_status(drive, sense); 1010 1011 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID) 1012 return 0; 1013 1014 /* try to get the total cdrom capacity and sector size */ 1015 stat = cdrom_read_capacity(drive, &toc->capacity, §ors_per_frame, 1016 sense); 1017 if (stat) 1018 toc->capacity = 0x1fffff; 1019 1020 set_capacity(info->disk, toc->capacity * sectors_per_frame); 1021 /* save a private copy of the TOC capacity for error handling */ 1022 drive->probed_capacity = toc->capacity * sectors_per_frame; 1023 1024 blk_queue_hardsect_size(drive->queue, 1025 sectors_per_frame << SECTOR_BITS); 1026 1027 /* first read just the header, so we know how long the TOC is */ 1028 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr, 1029 sizeof(struct atapi_toc_header), sense); 1030 if (stat) 1031 return stat; 1032 1033 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1034 toc->hdr.first_track = bcd2bin(toc->hdr.first_track); 1035 toc->hdr.last_track = bcd2bin(toc->hdr.last_track); 1036 } 1037 1038 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1; 1039 if (ntracks <= 0) 1040 return -EIO; 1041 if (ntracks > MAX_TRACKS) 1042 ntracks = MAX_TRACKS; 1043 1044 /* now read the whole schmeer */ 1045 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0, 1046 (char *)&toc->hdr, 1047 sizeof(struct atapi_toc_header) + 1048 (ntracks + 1) * 1049 sizeof(struct atapi_toc_entry), sense); 1050 1051 if (stat && toc->hdr.first_track > 1) { 1052 /* 1053 * Cds with CDI tracks only don't have any TOC entries, despite 1054 * of this the returned values are 1055 * first_track == last_track = number of CDI tracks + 1, 1056 * so that this case is indistinguishable from the same layout 1057 * plus an additional audio track. If we get an error for the 1058 * regular case, we assume a CDI without additional audio 1059 * tracks. In this case the readable TOC is empty (CDI tracks 1060 * are not included) and only holds the Leadout entry. 1061 * 1062 * Heiko Eißfeldt. 1063 */ 1064 ntracks = 0; 1065 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0, 1066 (char *)&toc->hdr, 1067 sizeof(struct atapi_toc_header) + 1068 (ntracks + 1) * 1069 sizeof(struct atapi_toc_entry), 1070 sense); 1071 if (stat) 1072 return stat; 1073 1074 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1075 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT); 1076 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT); 1077 } else { 1078 toc->hdr.first_track = CDROM_LEADOUT; 1079 toc->hdr.last_track = CDROM_LEADOUT; 1080 } 1081 } 1082 1083 if (stat) 1084 return stat; 1085 1086 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length); 1087 1088 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) { 1089 toc->hdr.first_track = bcd2bin(toc->hdr.first_track); 1090 toc->hdr.last_track = bcd2bin(toc->hdr.last_track); 1091 } 1092 1093 for (i = 0; i <= ntracks; i++) { 1094 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) { 1095 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) 1096 toc->ent[i].track = bcd2bin(toc->ent[i].track); 1097 msf_from_bcd(&toc->ent[i].addr.msf); 1098 } 1099 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute, 1100 toc->ent[i].addr.msf.second, 1101 toc->ent[i].addr.msf.frame); 1102 } 1103 1104 if (toc->hdr.first_track != CDROM_LEADOUT) { 1105 /* read the multisession information */ 1106 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp, 1107 sizeof(ms_tmp), sense); 1108 if (stat) 1109 return stat; 1110 1111 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba); 1112 } else { 1113 ms_tmp.hdr.last_track = CDROM_LEADOUT; 1114 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track; 1115 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */ 1116 } 1117 1118 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) { 1119 /* re-read multisession information using MSF format */ 1120 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp, 1121 sizeof(ms_tmp), sense); 1122 if (stat) 1123 return stat; 1124 1125 msf_from_bcd(&ms_tmp.ent.addr.msf); 1126 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute, 1127 ms_tmp.ent.addr.msf.second, 1128 ms_tmp.ent.addr.msf.frame); 1129 } 1130 1131 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track); 1132 1133 /* now try to get the total cdrom capacity */ 1134 stat = cdrom_get_last_written(cdi, &last_written); 1135 if (!stat && (last_written > toc->capacity)) { 1136 toc->capacity = last_written; 1137 set_capacity(info->disk, toc->capacity * sectors_per_frame); 1138 drive->probed_capacity = toc->capacity * sectors_per_frame; 1139 } 1140 1141 /* Remember that we've read this stuff. */ 1142 drive->atapi_flags |= IDE_AFLAG_TOC_VALID; 1143 1144 return 0; 1145} 1146 1147int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf) 1148{ 1149 struct cdrom_info *info = drive->driver_data; 1150 struct cdrom_device_info *cdi = &info->devinfo; 1151 struct packet_command cgc; 1152 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE; 1153 1154 ide_debug_log(IDE_DBG_FUNC, "enter"); 1155 1156 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0) 1157 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE; 1158 1159 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN); 1160 do { 1161 /* we seem to get stat=0x01,err=0x00 the first time (??) */ 1162 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0); 1163 if (!stat) 1164 break; 1165 } while (--attempts); 1166 return stat; 1167} 1168 1169void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf) 1170{ 1171 struct cdrom_info *cd = drive->driver_data; 1172 u16 curspeed, maxspeed; 1173 1174 ide_debug_log(IDE_DBG_FUNC, "enter"); 1175 1176 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) { 1177 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]); 1178 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]); 1179 } else { 1180 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]); 1181 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]); 1182 } 1183 1184 ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u", 1185 curspeed, maxspeed); 1186 1187 cd->current_speed = (curspeed + (176/2)) / 176; 1188 cd->max_speed = (maxspeed + (176/2)) / 176; 1189} 1190 1191#define IDE_CD_CAPABILITIES \ 1192 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \ 1193 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \ 1194 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \ 1195 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \ 1196 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM) 1197 1198static struct cdrom_device_ops ide_cdrom_dops = { 1199 .open = ide_cdrom_open_real, 1200 .release = ide_cdrom_release_real, 1201 .drive_status = ide_cdrom_drive_status, 1202 .media_changed = ide_cdrom_check_media_change_real, 1203 .tray_move = ide_cdrom_tray_move, 1204 .lock_door = ide_cdrom_lock_door, 1205 .select_speed = ide_cdrom_select_speed, 1206 .get_last_session = ide_cdrom_get_last_session, 1207 .get_mcn = ide_cdrom_get_mcn, 1208 .reset = ide_cdrom_reset, 1209 .audio_ioctl = ide_cdrom_audio_ioctl, 1210 .capability = IDE_CD_CAPABILITIES, 1211 .generic_packet = ide_cdrom_packet, 1212}; 1213 1214static int ide_cdrom_register(ide_drive_t *drive, int nslots) 1215{ 1216 struct cdrom_info *info = drive->driver_data; 1217 struct cdrom_device_info *devinfo = &info->devinfo; 1218 1219 ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots); 1220 1221 devinfo->ops = &ide_cdrom_dops; 1222 devinfo->speed = info->current_speed; 1223 devinfo->capacity = nslots; 1224 devinfo->handle = drive; 1225 strcpy(devinfo->name, drive->name); 1226 1227 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT) 1228 devinfo->mask |= CDC_SELECT_SPEED; 1229 1230 devinfo->disk = info->disk; 1231 return register_cdrom(devinfo); 1232} 1233 1234static int ide_cdrom_probe_capabilities(ide_drive_t *drive) 1235{ 1236 struct cdrom_info *cd = drive->driver_data; 1237 struct cdrom_device_info *cdi = &cd->devinfo; 1238 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE]; 1239 mechtype_t mechtype; 1240 int nslots = 1; 1241 1242 ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx", 1243 drive->media, drive->atapi_flags); 1244 1245 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R | 1246 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO | 1247 CDC_MO_DRIVE | CDC_RAM); 1248 1249 if (drive->media == ide_optical) { 1250 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM); 1251 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n", 1252 drive->name); 1253 return nslots; 1254 } 1255 1256 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) { 1257 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT; 1258 cdi->mask &= ~CDC_PLAY_AUDIO; 1259 return nslots; 1260 } 1261 1262 /* 1263 * We have to cheat a little here. the packet will eventually be queued 1264 * with ide_cdrom_packet(), which extracts the drive from cdi->handle. 1265 * Since this device hasn't been registered with the Uniform layer yet, 1266 * it can't do this. Same goes for cdi->ops. 1267 */ 1268 cdi->handle = drive; 1269 cdi->ops = &ide_cdrom_dops; 1270 1271 if (ide_cdrom_get_capabilities(drive, buf)) 1272 return 0; 1273 1274 if ((buf[8 + 6] & 0x01) == 0) 1275 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING; 1276 if (buf[8 + 6] & 0x08) 1277 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT; 1278 if (buf[8 + 3] & 0x01) 1279 cdi->mask &= ~CDC_CD_R; 1280 if (buf[8 + 3] & 0x02) 1281 cdi->mask &= ~(CDC_CD_RW | CDC_RAM); 1282 if (buf[8 + 2] & 0x38) 1283 cdi->mask &= ~CDC_DVD; 1284 if (buf[8 + 3] & 0x20) 1285 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM); 1286 if (buf[8 + 3] & 0x10) 1287 cdi->mask &= ~CDC_DVD_R; 1288 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK)) 1289 cdi->mask &= ~CDC_PLAY_AUDIO; 1290 1291 mechtype = buf[8 + 6] >> 5; 1292 if (mechtype == mechtype_caddy || 1293 mechtype == mechtype_popup || 1294 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE)) 1295 cdi->mask |= CDC_CLOSE_TRAY; 1296 1297 if (cdi->sanyo_slot > 0) { 1298 cdi->mask &= ~CDC_SELECT_DISC; 1299 nslots = 3; 1300 } else if (mechtype == mechtype_individual_changer || 1301 mechtype == mechtype_cartridge_changer) { 1302 nslots = cdrom_number_of_slots(cdi); 1303 if (nslots > 1) 1304 cdi->mask &= ~CDC_SELECT_DISC; 1305 } 1306 1307 ide_cdrom_update_speed(drive, buf); 1308 1309 printk(KERN_INFO PFX "%s: ATAPI", drive->name); 1310 1311 /* don't print speed if the drive reported 0 */ 1312 if (cd->max_speed) 1313 printk(KERN_CONT " %dX", cd->max_speed); 1314 1315 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM"); 1316 1317 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0) 1318 printk(KERN_CONT " DVD%s%s", 1319 (cdi->mask & CDC_DVD_R) ? "" : "-R", 1320 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM"); 1321 1322 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0) 1323 printk(KERN_CONT " CD%s%s", 1324 (cdi->mask & CDC_CD_R) ? "" : "-R", 1325 (cdi->mask & CDC_CD_RW) ? "" : "/RW"); 1326 1327 if ((cdi->mask & CDC_SELECT_DISC) == 0) 1328 printk(KERN_CONT " changer w/%d slots", nslots); 1329 else 1330 printk(KERN_CONT " drive"); 1331 1332 printk(KERN_CONT ", %dkB Cache\n", 1333 be16_to_cpup((__be16 *)&buf[8 + 12])); 1334 1335 return nslots; 1336} 1337 1338/* standard prep_rq_fn that builds 10 byte cmds */ 1339static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq) 1340{ 1341 int hard_sect = queue_hardsect_size(q); 1342 long block = (long)blk_rq_pos(rq) / (hard_sect >> 9); 1343 unsigned long blocks = blk_rq_sectors(rq) / (hard_sect >> 9); 1344 1345 memset(rq->cmd, 0, BLK_MAX_CDB); 1346 1347 if (rq_data_dir(rq) == READ) 1348 rq->cmd[0] = GPCMD_READ_10; 1349 else 1350 rq->cmd[0] = GPCMD_WRITE_10; 1351 1352 /* 1353 * fill in lba 1354 */ 1355 rq->cmd[2] = (block >> 24) & 0xff; 1356 rq->cmd[3] = (block >> 16) & 0xff; 1357 rq->cmd[4] = (block >> 8) & 0xff; 1358 rq->cmd[5] = block & 0xff; 1359 1360 /* 1361 * and transfer length 1362 */ 1363 rq->cmd[7] = (blocks >> 8) & 0xff; 1364 rq->cmd[8] = blocks & 0xff; 1365 rq->cmd_len = 10; 1366 return BLKPREP_OK; 1367} 1368 1369/* 1370 * Most of the SCSI commands are supported directly by ATAPI devices. 1371 * This transform handles the few exceptions. 1372 */ 1373static int ide_cdrom_prep_pc(struct request *rq) 1374{ 1375 u8 *c = rq->cmd; 1376 1377 /* transform 6-byte read/write commands to the 10-byte version */ 1378 if (c[0] == READ_6 || c[0] == WRITE_6) { 1379 c[8] = c[4]; 1380 c[5] = c[3]; 1381 c[4] = c[2]; 1382 c[3] = c[1] & 0x1f; 1383 c[2] = 0; 1384 c[1] &= 0xe0; 1385 c[0] += (READ_10 - READ_6); 1386 rq->cmd_len = 10; 1387 return BLKPREP_OK; 1388 } 1389 1390 /* 1391 * it's silly to pretend we understand 6-byte sense commands, just 1392 * reject with ILLEGAL_REQUEST and the caller should take the 1393 * appropriate action 1394 */ 1395 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) { 1396 rq->errors = ILLEGAL_REQUEST; 1397 return BLKPREP_KILL; 1398 } 1399 1400 return BLKPREP_OK; 1401} 1402 1403static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq) 1404{ 1405 if (blk_fs_request(rq)) 1406 return ide_cdrom_prep_fs(q, rq); 1407 else if (blk_pc_request(rq)) 1408 return ide_cdrom_prep_pc(rq); 1409 1410 return 0; 1411} 1412 1413struct cd_list_entry { 1414 const char *id_model; 1415 const char *id_firmware; 1416 unsigned int cd_flags; 1417}; 1418 1419#ifdef CONFIG_IDE_PROC_FS 1420static sector_t ide_cdrom_capacity(ide_drive_t *drive) 1421{ 1422 unsigned long capacity, sectors_per_frame; 1423 1424 if (cdrom_read_capacity(drive, &capacity, §ors_per_frame, NULL)) 1425 return 0; 1426 1427 return capacity * sectors_per_frame; 1428} 1429 1430static int proc_idecd_read_capacity(char *page, char **start, off_t off, 1431 int count, int *eof, void *data) 1432{ 1433 ide_drive_t *drive = data; 1434 int len; 1435 1436 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive)); 1437 PROC_IDE_READ_RETURN(page, start, off, count, eof, len); 1438} 1439 1440static ide_proc_entry_t idecd_proc[] = { 1441 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL }, 1442 { NULL, 0, NULL, NULL } 1443}; 1444 1445static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive) 1446{ 1447 return idecd_proc; 1448} 1449 1450static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive) 1451{ 1452 return NULL; 1453} 1454#endif 1455 1456static const struct cd_list_entry ide_cd_quirks_list[] = { 1457 /* SCR-3231 doesn't support the SET_CD_SPEED command. */ 1458 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT }, 1459 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */ 1460 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD | 1461 IDE_AFLAG_PRE_ATAPI12, }, 1462 /* Vertos 300, some versions of this drive like to talk BCD. */ 1463 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, }, 1464 /* Vertos 600 ESD. */ 1465 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, }, 1466 /* 1467 * Sanyo 3 CD changer uses a non-standard command for CD changing 1468 * (by default standard ATAPI support for CD changers is used). 1469 */ 1470 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD }, 1471 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD }, 1472 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD }, 1473 /* Stingray 8X CD-ROM. */ 1474 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 }, 1475 /* 1476 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length 1477 * mode sense page capabilities size, but older drives break. 1478 */ 1479 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE }, 1480 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE }, 1481 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */ 1482 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS }, 1483 /* 1484 * Some drives used by Apple don't advertise audio play 1485 * but they do support reading TOC & audio datas. 1486 */ 1487 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1488 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1489 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1490 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1491 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1492 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK }, 1493 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE }, 1494 { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE }, 1495 { NULL, NULL, 0 } 1496}; 1497 1498static unsigned int ide_cd_flags(u16 *id) 1499{ 1500 const struct cd_list_entry *cle = ide_cd_quirks_list; 1501 1502 while (cle->id_model) { 1503 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 && 1504 (cle->id_firmware == NULL || 1505 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware))) 1506 return cle->cd_flags; 1507 cle++; 1508 } 1509 1510 return 0; 1511} 1512 1513static int ide_cdrom_setup(ide_drive_t *drive) 1514{ 1515 struct cdrom_info *cd = drive->driver_data; 1516 struct cdrom_device_info *cdi = &cd->devinfo; 1517 struct request_queue *q = drive->queue; 1518 u16 *id = drive->id; 1519 char *fw_rev = (char *)&id[ATA_ID_FW_REV]; 1520 int nslots; 1521 1522 ide_debug_log(IDE_DBG_PROBE, "enter"); 1523 1524 blk_queue_prep_rq(q, ide_cdrom_prep_fn); 1525 blk_queue_dma_alignment(q, 31); 1526 blk_queue_update_dma_pad(q, 15); 1527 1528 q->unplug_delay = max((1 * HZ) / 1000, 1); 1529 1530 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED; 1531 drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id); 1532 1533 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) && 1534 fw_rev[4] == '1' && fw_rev[6] <= '2') 1535 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD | 1536 IDE_AFLAG_TOCADDR_AS_BCD); 1537 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) && 1538 fw_rev[4] == '1' && fw_rev[6] <= '2') 1539 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD; 1540 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD) 1541 /* 3 => use CD in slot 0 */ 1542 cdi->sanyo_slot = 3; 1543 1544 nslots = ide_cdrom_probe_capabilities(drive); 1545 1546 blk_queue_hardsect_size(q, CD_FRAMESIZE); 1547 1548 if (ide_cdrom_register(drive, nslots)) { 1549 printk(KERN_ERR PFX "%s: %s failed to register device with the" 1550 " cdrom driver.\n", drive->name, __func__); 1551 cd->devinfo.handle = NULL; 1552 return 1; 1553 } 1554 1555 ide_proc_register_driver(drive, cd->driver); 1556 return 0; 1557} 1558 1559static void ide_cd_remove(ide_drive_t *drive) 1560{ 1561 struct cdrom_info *info = drive->driver_data; 1562 1563 ide_debug_log(IDE_DBG_FUNC, "enter"); 1564 1565 ide_proc_unregister_driver(drive, info->driver); 1566 device_del(&info->dev); 1567 del_gendisk(info->disk); 1568 1569 mutex_lock(&idecd_ref_mutex); 1570 put_device(&info->dev); 1571 mutex_unlock(&idecd_ref_mutex); 1572} 1573 1574static void ide_cd_release(struct device *dev) 1575{ 1576 struct cdrom_info *info = to_ide_drv(dev, cdrom_info); 1577 struct cdrom_device_info *devinfo = &info->devinfo; 1578 ide_drive_t *drive = info->drive; 1579 struct gendisk *g = info->disk; 1580 1581 ide_debug_log(IDE_DBG_FUNC, "enter"); 1582 1583 kfree(info->toc); 1584 if (devinfo->handle == drive) 1585 unregister_cdrom(devinfo); 1586 drive->driver_data = NULL; 1587 blk_queue_prep_rq(drive->queue, NULL); 1588 g->private_data = NULL; 1589 put_disk(g); 1590 kfree(info); 1591} 1592 1593static int ide_cd_probe(ide_drive_t *); 1594 1595static struct ide_driver ide_cdrom_driver = { 1596 .gen_driver = { 1597 .owner = THIS_MODULE, 1598 .name = "ide-cdrom", 1599 .bus = &ide_bus_type, 1600 }, 1601 .probe = ide_cd_probe, 1602 .remove = ide_cd_remove, 1603 .version = IDECD_VERSION, 1604 .do_request = ide_cd_do_request, 1605#ifdef CONFIG_IDE_PROC_FS 1606 .proc_entries = ide_cd_proc_entries, 1607 .proc_devsets = ide_cd_proc_devsets, 1608#endif 1609}; 1610 1611static int idecd_open(struct block_device *bdev, fmode_t mode) 1612{ 1613 struct cdrom_info *info = ide_cd_get(bdev->bd_disk); 1614 int rc = -ENOMEM; 1615 1616 if (!info) 1617 return -ENXIO; 1618 1619 rc = cdrom_open(&info->devinfo, bdev, mode); 1620 1621 if (rc < 0) 1622 ide_cd_put(info); 1623 1624 return rc; 1625} 1626 1627static int idecd_release(struct gendisk *disk, fmode_t mode) 1628{ 1629 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 1630 1631 cdrom_release(&info->devinfo, mode); 1632 1633 ide_cd_put(info); 1634 1635 return 0; 1636} 1637 1638static int idecd_set_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 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char))) 1646 return -EFAULT; 1647 1648 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN); 1649 1650 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0); 1651 if (stat) 1652 return stat; 1653 1654 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f); 1655 return cdrom_mode_select(cdi, &cgc); 1656} 1657 1658static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg) 1659{ 1660 struct packet_command cgc; 1661 char buffer[16]; 1662 int stat; 1663 char spindown; 1664 1665 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN); 1666 1667 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0); 1668 if (stat) 1669 return stat; 1670 1671 spindown = buffer[11] & 0x0f; 1672 if (copy_to_user((void __user *)arg, &spindown, sizeof(char))) 1673 return -EFAULT; 1674 return 0; 1675} 1676 1677static int idecd_ioctl(struct block_device *bdev, fmode_t mode, 1678 unsigned int cmd, unsigned long arg) 1679{ 1680 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info); 1681 int err; 1682 1683 switch (cmd) { 1684 case CDROMSETSPINDOWN: 1685 return idecd_set_spindown(&info->devinfo, arg); 1686 case CDROMGETSPINDOWN: 1687 return idecd_get_spindown(&info->devinfo, arg); 1688 default: 1689 break; 1690 } 1691 1692 err = generic_ide_ioctl(info->drive, bdev, cmd, arg); 1693 if (err == -EINVAL) 1694 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg); 1695 1696 return err; 1697} 1698 1699static int idecd_media_changed(struct gendisk *disk) 1700{ 1701 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 1702 return cdrom_media_changed(&info->devinfo); 1703} 1704 1705static int idecd_revalidate_disk(struct gendisk *disk) 1706{ 1707 struct cdrom_info *info = ide_drv_g(disk, cdrom_info); 1708 struct request_sense sense; 1709 1710 ide_cd_read_toc(info->drive, &sense); 1711 1712 return 0; 1713} 1714 1715static struct block_device_operations idecd_ops = { 1716 .owner = THIS_MODULE, 1717 .open = idecd_open, 1718 .release = idecd_release, 1719 .locked_ioctl = idecd_ioctl, 1720 .media_changed = idecd_media_changed, 1721 .revalidate_disk = idecd_revalidate_disk 1722}; 1723 1724/* module options */ 1725static unsigned long debug_mask; 1726module_param(debug_mask, ulong, 0644); 1727 1728MODULE_DESCRIPTION("ATAPI CD-ROM Driver"); 1729 1730static int ide_cd_probe(ide_drive_t *drive) 1731{ 1732 struct cdrom_info *info; 1733 struct gendisk *g; 1734 struct request_sense sense; 1735 1736 ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x", 1737 drive->driver_req, drive->media); 1738 1739 if (!strstr("ide-cdrom", drive->driver_req)) 1740 goto failed; 1741 1742 if (drive->media != ide_cdrom && drive->media != ide_optical) 1743 goto failed; 1744 1745 drive->debug_mask = debug_mask; 1746 drive->irq_handler = cdrom_newpc_intr; 1747 1748 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL); 1749 if (info == NULL) { 1750 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n", 1751 drive->name); 1752 goto failed; 1753 } 1754 1755 g = alloc_disk(1 << PARTN_BITS); 1756 if (!g) 1757 goto out_free_cd; 1758 1759 ide_init_disk(g, drive); 1760 1761 info->dev.parent = &drive->gendev; 1762 info->dev.release = ide_cd_release; 1763 dev_set_name(&info->dev, dev_name(&drive->gendev)); 1764 1765 if (device_register(&info->dev)) 1766 goto out_free_disk; 1767 1768 info->drive = drive; 1769 info->driver = &ide_cdrom_driver; 1770 info->disk = g; 1771 1772 g->private_data = &info->driver; 1773 1774 drive->driver_data = info; 1775 1776 g->minors = 1; 1777 g->driverfs_dev = &drive->gendev; 1778 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE; 1779 if (ide_cdrom_setup(drive)) { 1780 put_device(&info->dev); 1781 goto failed; 1782 } 1783 1784 ide_cd_read_toc(drive, &sense); 1785 g->fops = &idecd_ops; 1786 g->flags |= GENHD_FL_REMOVABLE; 1787 add_disk(g); 1788 return 0; 1789 1790out_free_disk: 1791 put_disk(g); 1792out_free_cd: 1793 kfree(info); 1794failed: 1795 return -ENODEV; 1796} 1797 1798static void __exit ide_cdrom_exit(void) 1799{ 1800 driver_unregister(&ide_cdrom_driver.gen_driver); 1801} 1802 1803static int __init ide_cdrom_init(void) 1804{ 1805 printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n"); 1806 return driver_register(&ide_cdrom_driver.gen_driver); 1807} 1808 1809MODULE_ALIAS("ide:*m-cdrom*"); 1810MODULE_ALIAS("ide-cd"); 1811module_init(ide_cdrom_init); 1812module_exit(ide_cdrom_exit); 1813MODULE_LICENSE("GPL"); 1814