drivers/ide/ide-cd.c

   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/sched/task_stack.h>
  32 #include <linux/delay.h>
  33 #include <linux/timer.h>
  34 #include <linux/seq_file.h>
  35 #include <linux/slab.h>
  36 #include <linux/interrupt.h>
  37 #include <linux/errno.h>
  38 #include <linux/cdrom.h>
  39 #include <linux/ide.h>
  40 #include <linux/completion.h>
  41 #include <linux/mutex.h>
  42 #include <linux/bcd.h>
  43
  44 /* For SCSI -> ATAPI command conversion */
  45 #include <scsi/scsi.h>
  46
  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
  54 static DEFINE_MUTEX(ide_cd_mutex);
  55 static DEFINE_MUTEX(idecd_ref_mutex);
  56
  57 static void ide_cd_release(struct device *);
  58
  59 static struct cdrom_info *ide_cd_get(struct gendisk *disk)
  60 {
  61         struct cdrom_info *cd = NULL;
  62
  63         mutex_lock(&idecd_ref_mutex);
  64         cd = ide_drv_g(disk, cdrom_info);
  65         if (cd) {
  66                 if (ide_device_get(cd->drive))
  67                         cd = NULL;
  68                 else
  69                         get_device(&cd->dev);
  70
  71         }
  72         mutex_unlock(&idecd_ref_mutex);
  73         return cd;
  74 }
  75
  76 static void ide_cd_put(struct cdrom_info *cd)
  77 {
  78         ide_drive_t *drive = cd->drive;
  79
  80         mutex_lock(&idecd_ref_mutex);
  81         put_device(&cd->dev);
  82         ide_device_put(drive);
  83         mutex_unlock(&idecd_ref_mutex);
  84 }
  85
  86 /*
  87  * Generic packet command support and error handling routines.
  88  */
  89
  90 /* Mark that we've seen a media change and invalidate our internal buffers. */
  91 static void cdrom_saw_media_change(ide_drive_t *drive)
  92 {
  93         drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
  94         drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
  95 }
  96
  97 static int cdrom_log_sense(ide_drive_t *drive, struct request *rq)
  98 {
  99         struct request_sense *sense = &drive->sense_data;
 100         int log = 0;
 101
 102         if (!sense || !rq || (rq->rq_flags & RQF_QUIET))
 103                 return 0;
 104
 105         ide_debug_log(IDE_DBG_SENSE, "sense_key: 0x%x", sense->sense_key);
 106
 107         switch (sense->sense_key) {
 108         case NO_SENSE:
 109         case RECOVERED_ERROR:
 110                 break;
 111         case NOT_READY:
 112                 /*
 113                  * don't care about tray state messages for e.g. capacity
 114                  * commands or in-progress or becoming ready
 115                  */
 116                 if (sense->asc == 0x3a || sense->asc == 0x04)
 117                         break;
 118                 log = 1;
 119                 break;
 120         case ILLEGAL_REQUEST:
 121                 /*
 122                  * don't log START_STOP unit with LoEj set, since we cannot
 123                  * reliably check if drive can auto-close
 124                  */
 125                 if (scsi_req(rq)->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
 126                         break;
 127                 log = 1;
 128                 break;
 129         case UNIT_ATTENTION:
 130                 /*
 131                  * Make good and sure we've seen this potential media change.
 132                  * Some drives (i.e. Creative) fail to present the correct sense
 133                  * key in the error register.
 134                  */
 135                 cdrom_saw_media_change(drive);
 136                 break;
 137         default:
 138                 log = 1;
 139                 break;
 140         }
 141         return log;
 142 }
 143
 144 static void cdrom_analyze_sense_data(ide_drive_t *drive,
 145                                      struct request *failed_command)
 146 {
 147         struct request_sense *sense = &drive->sense_data;
 148         struct cdrom_info *info = drive->driver_data;
 149         unsigned long sector;
 150         unsigned long bio_sectors;
 151
 152         ide_debug_log(IDE_DBG_SENSE, "error_code: 0x%x, sense_key: 0x%x",
 153                                      sense->error_code, sense->sense_key);
 154
 155         if (failed_command)
 156                 ide_debug_log(IDE_DBG_SENSE, "failed cmd: 0x%x",
 157                                              failed_command->cmd[0]);
 158
 159         if (!cdrom_log_sense(drive, failed_command))
 160                 return;
 161
 162         /*
 163          * If a read toc is executed for a CD-R or CD-RW medium where the first
 164          * toc has not been recorded yet, it will fail with 05/24/00 (which is a
 165          * confusing error)
 166          */
 167         if (failed_command && scsi_req(failed_command)->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
 168                 if (sense->sense_key == 0x05 && sense->asc == 0x24)
 169                         return;
 170
 171         /* current error */
 172         if (sense->error_code == 0x70) {
 173                 switch (sense->sense_key) {
 174                 case MEDIUM_ERROR:
 175                 case VOLUME_OVERFLOW:
 176                 case ILLEGAL_REQUEST:
 177                         if (!sense->valid)
 178                                 break;
 179                         if (failed_command == NULL ||
 180                             blk_rq_is_passthrough(failed_command))
 181                                 break;
 182                         sector = (sense->information[0] << 24) |
 183                                  (sense->information[1] << 16) |
 184                                  (sense->information[2] <<  8) |
 185                                  (sense->information[3]);
 186
 187                         if (queue_logical_block_size(drive->queue) == 2048)
 188                                 /* device sector size is 2K */
 189                                 sector <<= 2;
 190
 191                         bio_sectors = max(bio_sectors(failed_command->bio), 4U);
 192                         sector &= ~(bio_sectors - 1);
 193
 194                         /*
 195                          * The SCSI specification allows for the value
 196                          * returned by READ CAPACITY to be up to 75 2K
 197                          * sectors past the last readable block.
 198                          * Therefore, if we hit a medium error within the
 199                          * last 75 2K sectors, we decrease the saved size
 200                          * value.
 201                          */
 202                         if (sector < get_capacity(info->disk) &&
 203                             drive->probed_capacity - sector < 4 * 75)
 204                                 set_capacity(info->disk, sector);
 205                 }
 206         }
 207
 208         ide_cd_log_error(drive->name, failed_command, sense);
 209 }
 210
 211 static void ide_cd_complete_failed_rq(ide_drive_t *drive, struct request *rq)
 212 {
 213         /*
 214          * For ATA_PRIV_SENSE, "rq->special" points to the original
 215          * failed request.  Also, the sense data should be read
 216          * directly from rq which might be different from the original
 217          * sense buffer if it got copied during mapping.
 218          */
 219         struct request *failed = (struct request *)rq->special;
 220         void *sense = bio_data(rq->bio);
 221
 222         if (failed) {
 223                 /*
 224                  * Sense is always read into drive->sense_data, copy back to the
 225                  * original request.
 226                  */
 227                 memcpy(scsi_req(failed)->sense, sense, 18);
 228                 scsi_req(failed)->sense_len = scsi_req(rq)->sense_len;
 229                 cdrom_analyze_sense_data(drive, failed);
 230
 231                 if (ide_end_rq(drive, failed, BLK_STS_IOERR, blk_rq_bytes(failed)))
 232                         BUG();
 233         } else
 234                 cdrom_analyze_sense_data(drive, NULL);
 235 }
 236
 237
 238 /*
 239  * Allow the drive 5 seconds to recover; some devices will return NOT_READY
 240  * while flushing data from cache.
 241  *
 242  * returns: 0 failed (write timeout expired)
 243  *          1 success
 244  */
 245 static int ide_cd_breathe(ide_drive_t *drive, struct request *rq)
 246 {
 247
 248         struct cdrom_info *info = drive->driver_data;
 249
 250         if (!scsi_req(rq)->result)
 251                 info->write_timeout = jiffies + ATAPI_WAIT_WRITE_BUSY;
 252
 253         scsi_req(rq)->result = 1;
 254
 255         if (time_after(jiffies, info->write_timeout))
 256                 return 0;
 257         else {
 258                 /*
 259                  * take a breather
 260                  */
 261                 blk_delay_queue(drive->queue, 1);
 262                 return 1;
 263         }
 264 }
 265
 266 /**
 267  * Returns:
 268  * 0: if the request should be continued.
 269  * 1: if the request will be going through error recovery.
 270  * 2: if the request should be ended.
 271  */
 272 static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
 273 {
 274         ide_hwif_t *hwif = drive->hwif;
 275         struct request *rq = hwif->rq;
 276         int err, sense_key, do_end_request = 0;
 277
 278         /* get the IDE error register */
 279         err = ide_read_error(drive);
 280         sense_key = err >> 4;
 281
 282         ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, rq->cmd_type: 0x%x, err: 0x%x, "
 283                                   "stat 0x%x",
 284                                   rq->cmd[0], rq->cmd_type, err, stat);
 285
 286         if (ata_sense_request(rq)) {
 287                 /*
 288                  * We got an error trying to get sense info from the drive
 289                  * (probably while trying to recover from a former error).
 290                  * Just give up.
 291                  */
 292                 rq->rq_flags |= RQF_FAILED;
 293                 return 2;
 294         }
 295
 296         /* if we have an error, pass CHECK_CONDITION as the SCSI status byte */
 297         if (blk_rq_is_scsi(rq) && !scsi_req(rq)->result)
 298                 scsi_req(rq)->result = SAM_STAT_CHECK_CONDITION;
 299
 300         if (blk_noretry_request(rq))
 301                 do_end_request = 1;
 302
 303         switch (sense_key) {
 304         case NOT_READY:
 305                 if (req_op(rq) == REQ_OP_WRITE) {
 306                         if (ide_cd_breathe(drive, rq))
 307                                 return 1;
 308                 } else {
 309                         cdrom_saw_media_change(drive);
 310
 311                         if (!blk_rq_is_passthrough(rq) &&
 312                             !(rq->rq_flags & RQF_QUIET))
 313                                 printk(KERN_ERR PFX "%s: tray open\n",
 314                                         drive->name);
 315                 }
 316                 do_end_request = 1;
 317                 break;
 318         case UNIT_ATTENTION:
 319                 cdrom_saw_media_change(drive);
 320
 321                 if (blk_rq_is_passthrough(rq))
 322                         return 0;
 323
 324                 /*
 325                  * Arrange to retry the request but be sure to give up if we've
 326                  * retried too many times.
 327                  */
 328                 if (++scsi_req(rq)->result > ERROR_MAX)
 329                         do_end_request = 1;
 330                 break;
 331         case ILLEGAL_REQUEST:
 332                 /*
 333                  * Don't print error message for this condition -- SFF8090i
 334                  * indicates that 5/24/00 is the correct response to a request
 335                  * to close the tray if the drive doesn't have that capability.
 336                  *
 337                  * cdrom_log_sense() knows this!
 338                  */
 339                 if (scsi_req(rq)->cmd[0] == GPCMD_START_STOP_UNIT)
 340                         break;
 341                 /* fall-through */
 342         case DATA_PROTECT:
 343                 /*
 344                  * No point in retrying after an illegal request or data
 345                  * protect error.
 346                  */
 347                 if (!(rq->rq_flags & RQF_QUIET))
 348                         ide_dump_status(drive, "command error", stat);
 349                 do_end_request = 1;
 350                 break;
 351         case MEDIUM_ERROR:
 352                 /*
 353                  * No point in re-trying a zillion times on a bad sector.
 354                  * If we got here the error is not correctable.
 355                  */
 356                 if (!(rq->rq_flags & RQF_QUIET))
 357                         ide_dump_status(drive, "media error "
 358                                         "(bad sector)", stat);
 359                 do_end_request = 1;
 360                 break;
 361         case BLANK_CHECK:
 362                 /* disk appears blank? */
 363                 if (!(rq->rq_flags & RQF_QUIET))
 364                         ide_dump_status(drive, "media error (blank)",
 365                                         stat);
 366                 do_end_request = 1;
 367                 break;
 368         default:
 369                 if (blk_rq_is_passthrough(rq))
 370                         break;
 371                 if (err & ~ATA_ABORTED) {
 372                         /* go to the default handler for other errors */
 373                         ide_error(drive, "cdrom_decode_status", stat);
 374                         return 1;
 375                 } else if (++scsi_req(rq)->result > ERROR_MAX)
 376                         /* we've racked up too many retries, abort */
 377                         do_end_request = 1;
 378         }
 379
 380         if (blk_rq_is_passthrough(rq)) {
 381                 rq->rq_flags |= RQF_FAILED;
 382                 do_end_request = 1;
 383         }
 384
 385         /*
 386          * End a request through request sense analysis when we have sense data.
 387          * We need this in order to perform end of media processing.
 388          */
 389         if (do_end_request)
 390                 goto end_request;
 391
 392         /* if we got a CHECK_CONDITION status, queue a request sense command */
 393         if (stat & ATA_ERR)
 394                 return ide_queue_sense_rq(drive, NULL) ? 2 : 1;
 395         return 1;
 396
 397 end_request:
 398         if (stat & ATA_ERR) {
 399                 hwif->rq = NULL;
 400                 return ide_queue_sense_rq(drive, rq) ? 2 : 1;
 401         } else
 402                 return 2;
 403 }
 404
 405 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct ide_cmd *cmd)
 406 {
 407         struct request *rq = cmd->rq;
 408
 409         ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]);
 410
 411         /*
 412          * Some of the trailing request sense fields are optional,
 413          * and some drives don't send them.  Sigh.
 414          */
 415         if (scsi_req(rq)->cmd[0] == GPCMD_REQUEST_SENSE &&
 416             cmd->nleft > 0 && cmd->nleft <= 5)
 417                 cmd->nleft = 0;
 418 }
 419
 420 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
 421                     int write, void *buffer, unsigned *bufflen,
 422                     struct request_sense *sense, int timeout,
 423                     req_flags_t rq_flags)
 424 {
 425         struct cdrom_info *info = drive->driver_data;
 426         int retries = 10;
 427         bool failed;
 428
 429         ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, "
 430                                   "rq_flags: 0x%x",
 431                                   cmd[0], write, timeout, rq_flags);
 432
 433         /* start of retry loop */
 434         do {
 435                 struct request *rq;
 436                 int error;
 437                 bool delay = false;
 438
 439                 rq = blk_get_request(drive->queue,
 440                         write ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN,  __GFP_RECLAIM);
 441                 memcpy(scsi_req(rq)->cmd, cmd, BLK_MAX_CDB);
 442                 ide_req(rq)->type = ATA_PRIV_PC;
 443                 rq->rq_flags |= rq_flags;
 444                 rq->timeout = timeout;
 445                 if (buffer) {
 446                         error = blk_rq_map_kern(drive->queue, rq, buffer,
 447                                                 *bufflen, GFP_NOIO);
 448                         if (error) {
 449                                 blk_put_request(rq);
 450                                 return error;
 451                         }
 452                 }
 453
 454                 blk_execute_rq(drive->queue, info->disk, rq, 0);
 455                 error = scsi_req(rq)->result ? -EIO : 0;
 456
 457                 if (buffer)
 458                         *bufflen = scsi_req(rq)->resid_len;
 459                 if (sense)
 460                         memcpy(sense, scsi_req(rq)->sense, sizeof(*sense));
 461
 462                 /*
 463                  * FIXME: we should probably abort/retry or something in case of
 464                  * failure.
 465                  */
 466                 failed = (rq->rq_flags & RQF_FAILED) != 0;
 467                 if (failed) {
 468                         /*
 469                          * The request failed.  Retry if it was due to a unit
 470                          * attention status (usually means media was changed).
 471                          */
 472                         struct request_sense *reqbuf = scsi_req(rq)->sense;
 473
 474                         if (reqbuf->sense_key == UNIT_ATTENTION)
 475                                 cdrom_saw_media_change(drive);
 476                         else if (reqbuf->sense_key == NOT_READY &&
 477                                  reqbuf->asc == 4 && reqbuf->ascq != 4) {
 478                                 /*
 479                                  * The drive is in the process of loading
 480                                  * a disk.  Retry, but wait a little to give
 481                                  * the drive time to complete the load.
 482                                  */
 483                                 delay = true;
 484                         } else {
 485                                 /* otherwise, don't retry */
 486                                 retries = 0;
 487                         }
 488                         --retries;
 489                 }
 490                 blk_put_request(rq);
 491                 if (delay)
 492                         ssleep(2);
 493         } while (failed && retries >= 0);
 494
 495         /* return an error if the command failed */
 496         return failed ? -EIO : 0;
 497 }
 498
 499 /*
 500  * returns true if rq has been completed
 501  */
 502 static bool ide_cd_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
 503 {
 504         unsigned int nr_bytes = cmd->nbytes - cmd->nleft;
 505
 506         if (cmd->tf_flags & IDE_TFLAG_WRITE)
 507                 nr_bytes -= cmd->last_xfer_len;
 508
 509         if (nr_bytes > 0) {
 510                 ide_complete_rq(drive, BLK_STS_OK, nr_bytes);
 511                 return true;
 512         }
 513
 514         return false;
 515 }
 516
 517 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 518 {
 519         ide_hwif_t *hwif = drive->hwif;
 520         struct ide_cmd *cmd = &hwif->cmd;
 521         struct request *rq = hwif->rq;
 522         ide_expiry_t *expiry = NULL;
 523         int dma_error = 0, dma, thislen, uptodate = 0;
 524         int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc = 0;
 525         int sense = ata_sense_request(rq);
 526         unsigned int timeout;
 527         u16 len;
 528         u8 ireason, stat;
 529
 530         ide_debug_log(IDE_DBG_PC, "cmd: 0x%x, write: 0x%x", rq->cmd[0], write);
 531
 532         /* check for errors */
 533         dma = drive->dma;
 534         if (dma) {
 535                 drive->dma = 0;
 536                 drive->waiting_for_dma = 0;
 537                 dma_error = hwif->dma_ops->dma_end(drive);
 538                 ide_dma_unmap_sg(drive, cmd);
 539                 if (dma_error) {
 540                         printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
 541                                         write ? "write" : "read");
 542                         ide_dma_off(drive);
 543                 }
 544         }
 545
 546         /* check status */
 547         stat = hwif->tp_ops->read_status(hwif);
 548
 549         if (!OK_STAT(stat, 0, BAD_R_STAT)) {
 550                 rc = cdrom_decode_status(drive, stat);
 551                 if (rc) {
 552                         if (rc == 2)
 553                                 goto out_end;
 554                         return ide_stopped;
 555                 }
 556         }
 557
 558         /* using dma, transfer is complete now */
 559         if (dma) {
 560                 if (dma_error)
 561                         return ide_error(drive, "dma error", stat);
 562                 uptodate = 1;
 563                 goto out_end;
 564         }
 565
 566         ide_read_bcount_and_ireason(drive, &len, &ireason);
 567
 568         thislen = !blk_rq_is_passthrough(rq) ? len : cmd->nleft;
 569         if (thislen > len)
 570                 thislen = len;
 571
 572         ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d",
 573                                   stat, thislen);
 574
 575         /* If DRQ is clear, the command has completed. */
 576         if ((stat & ATA_DRQ) == 0) {
 577                 switch (req_op(rq)) {
 578                 default:
 579                         /*
 580                          * If we're not done reading/writing, complain.
 581                          * Otherwise, complete the command normally.
 582                          */
 583                         uptodate = 1;
 584                         if (cmd->nleft > 0) {
 585                                 printk(KERN_ERR PFX "%s: %s: data underrun "
 586                                         "(%u bytes)\n", drive->name, __func__,
 587                                         cmd->nleft);
 588                                 if (!write)
 589                                         rq->rq_flags |= RQF_FAILED;
 590                                 uptodate = 0;
 591                         }
 592                         goto out_end;
 593                 case REQ_OP_DRV_IN:
 594                 case REQ_OP_DRV_OUT:
 595                         ide_cd_request_sense_fixup(drive, cmd);
 596
 597                         uptodate = cmd->nleft ? 0 : 1;
 598
 599                         /*
 600                          * suck out the remaining bytes from the drive in an
 601                          * attempt to complete the data xfer. (see BZ#13399)
 602                          */
 603                         if (!(stat & ATA_ERR) && !uptodate && thislen) {
 604                                 ide_pio_bytes(drive, cmd, write, thislen);
 605                                 uptodate = cmd->nleft ? 0 : 1;
 606                         }
 607
 608                         if (!uptodate)
 609                                 rq->rq_flags |= RQF_FAILED;
 610                         goto out_end;
 611                 case REQ_OP_SCSI_IN:
 612                 case REQ_OP_SCSI_OUT:
 613                         goto out_end;
 614                 }
 615         }
 616
 617         rc = ide_check_ireason(drive, rq, len, ireason, write);
 618         if (rc)
 619                 goto out_end;
 620
 621         cmd->last_xfer_len = 0;
 622
 623         ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, "
 624                                   "ireason: 0x%x",
 625                                   rq->cmd_type, ireason);
 626
 627         /* transfer data */
 628         while (thislen > 0) {
 629                 int blen = min_t(int, thislen, cmd->nleft);
 630
 631                 if (cmd->nleft == 0)
 632                         break;
 633
 634                 ide_pio_bytes(drive, cmd, write, blen);
 635                 cmd->last_xfer_len += blen;
 636
 637                 thislen -= blen;
 638                 len -= blen;
 639
 640                 if (sense && write == 0)
 641                         scsi_req(rq)->sense_len += blen;
 642         }
 643
 644         /* pad, if necessary */
 645         if (len > 0) {
 646                 if (blk_rq_is_passthrough(rq) || write == 0)
 647                         ide_pad_transfer(drive, write, len);
 648                 else {
 649                         printk(KERN_ERR PFX "%s: confused, missing data\n",
 650                                 drive->name);
 651                         blk_dump_rq_flags(rq, "cdrom_newpc_intr");
 652                 }
 653         }
 654
 655         switch (req_op(rq)) {
 656         case REQ_OP_SCSI_IN:
 657         case REQ_OP_SCSI_OUT:
 658                 timeout = rq->timeout;
 659                 break;
 660         case REQ_OP_DRV_IN:
 661         case REQ_OP_DRV_OUT:
 662                 expiry = ide_cd_expiry;
 663                 /*FALLTHRU*/
 664         default:
 665                 timeout = ATAPI_WAIT_PC;
 666                 break;
 667         }
 668
 669         hwif->expiry = expiry;
 670         ide_set_handler(drive, cdrom_newpc_intr, timeout);
 671         return ide_started;
 672
 673 out_end:
 674         if (blk_rq_is_scsi(rq) && rc == 0) {
 675                 scsi_req(rq)->resid_len = 0;
 676                 blk_end_request_all(rq, BLK_STS_OK);
 677                 hwif->rq = NULL;
 678         } else {
 679                 if (sense && uptodate)
 680                         ide_cd_complete_failed_rq(drive, rq);
 681
 682                 if (!blk_rq_is_passthrough(rq)) {
 683                         if (cmd->nleft == 0)
 684                                 uptodate = 1;
 685                 } else {
 686                         if (uptodate <= 0 && scsi_req(rq)->result == 0)
 687                                 scsi_req(rq)->result = -EIO;
 688                 }
 689
 690                 if (uptodate == 0 && rq->bio)
 691                         if (ide_cd_error_cmd(drive, cmd))
 692                                 return ide_stopped;
 693
 694                 /* make sure it's fully ended */
 695                 if (blk_rq_is_passthrough(rq)) {
 696                         scsi_req(rq)->resid_len -= cmd->nbytes - cmd->nleft;
 697                         if (uptodate == 0 && (cmd->tf_flags & IDE_TFLAG_WRITE))
 698                                 scsi_req(rq)->resid_len += cmd->last_xfer_len;
 699                 }
 700
 701                 ide_complete_rq(drive, uptodate ? BLK_STS_OK : BLK_STS_IOERR, blk_rq_bytes(rq));
 702
 703                 if (sense && rc == 2)
 704                         ide_error(drive, "request sense failure", stat);
 705         }
 706         return ide_stopped;
 707 }
 708
 709 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
 710 {
 711         struct cdrom_info *cd = drive->driver_data;
 712         struct request_queue *q = drive->queue;
 713         int write = rq_data_dir(rq) == WRITE;
 714         unsigned short sectors_per_frame =
 715                 queue_logical_block_size(q) >> SECTOR_BITS;
 716
 717         ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, rq->cmd_flags: 0x%x, "
 718                                   "secs_per_frame: %u",
 719                                   rq->cmd[0], rq->cmd_flags, sectors_per_frame);
 720
 721         if (write) {
 722                 /* disk has become write protected */
 723                 if (get_disk_ro(cd->disk))
 724                         return ide_stopped;
 725         } else {
 726                 /*
 727                  * We may be retrying this request after an error.  Fix up any
 728                  * weirdness which might be present in the request packet.
 729                  */
 730                 q->prep_rq_fn(q, rq);
 731         }
 732
 733         /* fs requests *must* be hardware frame aligned */
 734         if ((blk_rq_sectors(rq) & (sectors_per_frame - 1)) ||
 735             (blk_rq_pos(rq) & (sectors_per_frame - 1)))
 736                 return ide_stopped;
 737
 738         /* use DMA, if possible */
 739         drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
 740
 741         if (write)
 742                 cd->devinfo.media_written = 1;
 743
 744         rq->timeout = ATAPI_WAIT_PC;
 745
 746         return ide_started;
 747 }
 748
 749 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
 750 {
 751
 752         ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
 753                                   rq->cmd[0], rq->cmd_type);
 754
 755         if (blk_rq_is_scsi(rq))
 756                 rq->rq_flags |= RQF_QUIET;
 757         else
 758                 rq->rq_flags &= ~RQF_FAILED;
 759
 760         drive->dma = 0;
 761
 762         /* sg request */
 763         if (rq->bio) {
 764                 struct request_queue *q = drive->queue;
 765                 char *buf = bio_data(rq->bio);
 766                 unsigned int alignment;
 767
 768                 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
 769
 770                 /*
 771                  * check if dma is safe
 772                  *
 773                  * NOTE! The "len" and "addr" checks should possibly have
 774                  * separate masks.
 775                  */
 776                 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
 777                 if ((unsigned long)buf & alignment
 778                     || blk_rq_bytes(rq) & q->dma_pad_mask
 779                     || object_is_on_stack(buf))
 780                         drive->dma = 0;
 781         }
 782 }
 783
 784 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
 785                                         sector_t block)
 786 {
 787         struct ide_cmd cmd;
 788         int uptodate = 0;
 789         unsigned int nsectors;
 790
 791         ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
 792                                   rq->cmd[0], (unsigned long long)block);
 793
 794         if (drive->debug_mask & IDE_DBG_RQ)
 795                 blk_dump_rq_flags(rq, "ide_cd_do_request");
 796
 797         switch (req_op(rq)) {
 798         default:
 799                 if (cdrom_start_rw(drive, rq) == ide_stopped)
 800                         goto out_end;
 801                 break;
 802         case REQ_OP_SCSI_IN:
 803         case REQ_OP_SCSI_OUT:
 804         handle_pc:
 805                 if (!rq->timeout)
 806                         rq->timeout = ATAPI_WAIT_PC;
 807                 cdrom_do_block_pc(drive, rq);
 808                 break;
 809         case REQ_OP_DRV_IN:
 810         case REQ_OP_DRV_OUT:
 811                 switch (ide_req(rq)->type) {
 812                 case ATA_PRIV_MISC:
 813                         /* right now this can only be a reset... */
 814                         uptodate = 1;
 815                         goto out_end;
 816                 case ATA_PRIV_SENSE:
 817                 case ATA_PRIV_PC:
 818                         goto handle_pc;
 819                 default:
 820                         BUG();
 821                 }
 822         }
 823
 824         /* prepare sense request for this command */
 825         ide_prep_sense(drive, rq);
 826
 827         memset(&cmd, 0, sizeof(cmd));
 828
 829         if (rq_data_dir(rq))
 830                 cmd.tf_flags |= IDE_TFLAG_WRITE;
 831
 832         cmd.rq = rq;
 833
 834         if (!blk_rq_is_passthrough(rq) || blk_rq_bytes(rq)) {
 835                 ide_init_sg_cmd(&cmd, blk_rq_bytes(rq));
 836                 ide_map_sg(drive, &cmd);
 837         }
 838
 839         return ide_issue_pc(drive, &cmd);
 840 out_end:
 841         nsectors = blk_rq_sectors(rq);
 842
 843         if (nsectors == 0)
 844                 nsectors = 1;
 845
 846         ide_complete_rq(drive, uptodate ? BLK_STS_OK : BLK_STS_IOERR, nsectors << 9);
 847
 848         return ide_stopped;
 849 }
 850
 851 /*
 852  * Ioctl handling.
 853  *
 854  * Routines which queue packet commands take as a final argument a pointer to a
 855  * request_sense struct. If execution of the command results in an error with a
 856  * CHECK CONDITION status, this structure will be filled with the results of the
 857  * subsequent request sense command. The pointer can also be NULL, in which case
 858  * no sense information is returned.
 859  */
 860 static void msf_from_bcd(struct atapi_msf *msf)
 861 {
 862         msf->minute = bcd2bin(msf->minute);
 863         msf->second = bcd2bin(msf->second);
 864         msf->frame  = bcd2bin(msf->frame);
 865 }
 866
 867 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
 868 {
 869         struct cdrom_info *info = drive->driver_data;
 870         struct cdrom_device_info *cdi = &info->devinfo;
 871         unsigned char cmd[BLK_MAX_CDB];
 872
 873         ide_debug_log(IDE_DBG_FUNC, "enter");
 874
 875         memset(cmd, 0, BLK_MAX_CDB);
 876         cmd[0] = GPCMD_TEST_UNIT_READY;
 877
 878         /*
 879          * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
 880          * instead of supporting the LOAD_UNLOAD opcode.
 881          */
 882         cmd[7] = cdi->sanyo_slot % 3;
 883
 884         return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, RQF_QUIET);
 885 }
 886
 887 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
 888                                unsigned long *sectors_per_frame,
 889                                struct request_sense *sense)
 890 {
 891         struct {
 892                 __be32 lba;
 893                 __be32 blocklen;
 894         } capbuf;
 895
 896         int stat;
 897         unsigned char cmd[BLK_MAX_CDB];
 898         unsigned len = sizeof(capbuf);
 899         u32 blocklen;
 900
 901         ide_debug_log(IDE_DBG_FUNC, "enter");
 902
 903         memset(cmd, 0, BLK_MAX_CDB);
 904         cmd[0] = GPCMD_READ_CDVD_CAPACITY;
 905
 906         stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
 907                                RQF_QUIET);
 908         if (stat)
 909                 return stat;
 910
 911         /*
 912          * Sanity check the given block size, in so far as making
 913          * sure the sectors_per_frame we give to the caller won't
 914          * end up being bogus.
 915          */
 916         blocklen = be32_to_cpu(capbuf.blocklen);
 917         blocklen = (blocklen >> SECTOR_BITS) << SECTOR_BITS;
 918         switch (blocklen) {
 919         case 512:
 920         case 1024:
 921         case 2048:
 922         case 4096:
 923                 break;
 924         default:
 925                 printk_once(KERN_ERR PFX "%s: weird block size %u; "
 926                                 "setting default block size to 2048\n",
 927                                 drive->name, blocklen);
 928                 blocklen = 2048;
 929                 break;
 930         }
 931
 932         *capacity = 1 + be32_to_cpu(capbuf.lba);
 933         *sectors_per_frame = blocklen >> SECTOR_BITS;
 934
 935         ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu",
 936                                      *capacity, *sectors_per_frame);
 937
 938         return 0;
 939 }
 940
 941 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
 942                                 int format, char *buf, int buflen,
 943                                 struct request_sense *sense)
 944 {
 945         unsigned char cmd[BLK_MAX_CDB];
 946
 947         ide_debug_log(IDE_DBG_FUNC, "enter");
 948
 949         memset(cmd, 0, BLK_MAX_CDB);
 950
 951         cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
 952         cmd[6] = trackno;
 953         cmd[7] = (buflen >> 8);
 954         cmd[8] = (buflen & 0xff);
 955         cmd[9] = (format << 6);
 956
 957         if (msf_flag)
 958                 cmd[1] = 2;
 959
 960         return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, RQF_QUIET);
 961 }
 962
 963 /* Try to read the entire TOC for the disk into our internal buffer. */
 964 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
 965 {
 966         int stat, ntracks, i;
 967         struct cdrom_info *info = drive->driver_data;
 968         struct cdrom_device_info *cdi = &info->devinfo;
 969         struct atapi_toc *toc = info->toc;
 970         struct {
 971                 struct atapi_toc_header hdr;
 972                 struct atapi_toc_entry  ent;
 973         } ms_tmp;
 974         long last_written;
 975         unsigned long sectors_per_frame = SECTORS_PER_FRAME;
 976
 977         ide_debug_log(IDE_DBG_FUNC, "enter");
 978
 979         if (toc == NULL) {
 980                 /* try to allocate space */
 981                 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
 982                 if (toc == NULL) {
 983                         printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
 984                                         drive->name);
 985                         return -ENOMEM;
 986                 }
 987                 info->toc = toc;
 988         }
 989
 990         /*
 991          * Check to see if the existing data is still valid. If it is,
 992          * just return.
 993          */
 994         (void) cdrom_check_status(drive, sense);
 995
 996         if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
 997                 return 0;
 998
 999         /* try to get the total cdrom capacity and sector size */
1000         stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1001                                    sense);
1002         if (stat)
1003                 toc->capacity = 0x1fffff;
1004
1005         set_capacity(info->disk, toc->capacity * sectors_per_frame);
1006         /* save a private copy of the TOC capacity for error handling */
1007         drive->probed_capacity = toc->capacity * sectors_per_frame;
1008
1009         blk_queue_logical_block_size(drive->queue,
1010                                      sectors_per_frame << SECTOR_BITS);
1011
1012         /* first read just the header, so we know how long the TOC is */
1013         stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1014                                     sizeof(struct atapi_toc_header), sense);
1015         if (stat)
1016                 return stat;
1017
1018         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1019                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1020                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1021         }
1022
1023         ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1024         if (ntracks <= 0)
1025                 return -EIO;
1026         if (ntracks > MAX_TRACKS)
1027                 ntracks = MAX_TRACKS;
1028
1029         /* now read the whole schmeer */
1030         stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1031                                   (char *)&toc->hdr,
1032                                    sizeof(struct atapi_toc_header) +
1033                                    (ntracks + 1) *
1034                                    sizeof(struct atapi_toc_entry), sense);
1035
1036         if (stat && toc->hdr.first_track > 1) {
1037                 /*
1038                  * Cds with CDI tracks only don't have any TOC entries, despite
1039                  * of this the returned values are
1040                  * first_track == last_track = number of CDI tracks + 1,
1041                  * so that this case is indistinguishable from the same layout
1042                  * plus an additional audio track. If we get an error for the
1043                  * regular case, we assume a CDI without additional audio
1044                  * tracks. In this case the readable TOC is empty (CDI tracks
1045                  * are not included) and only holds the Leadout entry.
1046                  *
1047                  * Heiko Eißfeldt.
1048                  */
1049                 ntracks = 0;
1050                 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1051                                            (char *)&toc->hdr,
1052                                            sizeof(struct atapi_toc_header) +
1053                                            (ntracks + 1) *
1054                                            sizeof(struct atapi_toc_entry),
1055                                            sense);
1056                 if (stat)
1057                         return stat;
1058
1059                 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1060                         toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1061                         toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1062                 } else {
1063                         toc->hdr.first_track = CDROM_LEADOUT;
1064                         toc->hdr.last_track = CDROM_LEADOUT;
1065                 }
1066         }
1067
1068         if (stat)
1069                 return stat;
1070
1071         toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1072
1073         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1074                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1075                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1076         }
1077
1078         for (i = 0; i <= ntracks; i++) {
1079                 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1080                         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1081                                 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1082                         msf_from_bcd(&toc->ent[i].addr.msf);
1083                 }
1084                 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1085                                                   toc->ent[i].addr.msf.second,
1086                                                   toc->ent[i].addr.msf.frame);
1087         }
1088
1089         if (toc->hdr.first_track != CDROM_LEADOUT) {
1090                 /* read the multisession information */
1091                 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1092                                            sizeof(ms_tmp), sense);
1093                 if (stat)
1094                         return stat;
1095
1096                 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1097         } else {
1098                 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1099                 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1100                 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1101         }
1102
1103         if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1104                 /* re-read multisession information using MSF format */
1105                 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1106                                            sizeof(ms_tmp), sense);
1107                 if (stat)
1108                         return stat;
1109
1110                 msf_from_bcd(&ms_tmp.ent.addr.msf);
1111                 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1112                                                    ms_tmp.ent.addr.msf.second,
1113                                                    ms_tmp.ent.addr.msf.frame);
1114         }
1115
1116         toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1117
1118         /* now try to get the total cdrom capacity */
1119         stat = cdrom_get_last_written(cdi, &last_written);
1120         if (!stat && (last_written > toc->capacity)) {
1121                 toc->capacity = last_written;
1122                 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1123                 drive->probed_capacity = toc->capacity * sectors_per_frame;
1124         }
1125
1126         /* Remember that we've read this stuff. */
1127         drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1128
1129         return 0;
1130 }
1131
1132 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1133 {
1134         struct cdrom_info *info = drive->driver_data;
1135         struct cdrom_device_info *cdi = &info->devinfo;
1136         struct packet_command cgc;
1137         int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1138
1139         ide_debug_log(IDE_DBG_FUNC, "enter");
1140
1141         if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1142                 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1143
1144         init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1145         do {
1146                 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1147                 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1148                 if (!stat)
1149                         break;
1150         } while (--attempts);
1151         return stat;
1152 }
1153
1154 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1155 {
1156         struct cdrom_info *cd = drive->driver_data;
1157         u16 curspeed, maxspeed;
1158
1159         ide_debug_log(IDE_DBG_FUNC, "enter");
1160
1161         if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1162                 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1163                 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1164         } else {
1165                 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1166                 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1167         }
1168
1169         ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u",
1170                                      curspeed, maxspeed);
1171
1172         cd->current_speed = DIV_ROUND_CLOSEST(curspeed, 176);
1173         cd->max_speed = DIV_ROUND_CLOSEST(maxspeed, 176);
1174 }
1175
1176 #define IDE_CD_CAPABILITIES \
1177         (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1178          CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1179          CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1180          CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1181          CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1182
1183 static const struct cdrom_device_ops ide_cdrom_dops = {
1184         .open                   = ide_cdrom_open_real,
1185         .release                = ide_cdrom_release_real,
1186         .drive_status           = ide_cdrom_drive_status,
1187         .check_events           = ide_cdrom_check_events_real,
1188         .tray_move              = ide_cdrom_tray_move,
1189         .lock_door              = ide_cdrom_lock_door,
1190         .select_speed           = ide_cdrom_select_speed,
1191         .get_last_session       = ide_cdrom_get_last_session,
1192         .get_mcn                = ide_cdrom_get_mcn,
1193         .reset                  = ide_cdrom_reset,
1194         .audio_ioctl            = ide_cdrom_audio_ioctl,
1195         .capability             = IDE_CD_CAPABILITIES,
1196         .generic_packet         = ide_cdrom_packet,
1197 };
1198
1199 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1200 {
1201         struct cdrom_info *info = drive->driver_data;
1202         struct cdrom_device_info *devinfo = &info->devinfo;
1203
1204         ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots);
1205
1206         devinfo->ops = &ide_cdrom_dops;
1207         devinfo->speed = info->current_speed;
1208         devinfo->capacity = nslots;
1209         devinfo->handle = drive;
1210         strcpy(devinfo->name, drive->name);
1211
1212         if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1213                 devinfo->mask |= CDC_SELECT_SPEED;
1214
1215         devinfo->disk = info->disk;
1216         return register_cdrom(devinfo);
1217 }
1218
1219 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1220 {
1221         struct cdrom_info *cd = drive->driver_data;
1222         struct cdrom_device_info *cdi = &cd->devinfo;
1223         u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1224         mechtype_t mechtype;
1225         int nslots = 1;
1226
1227         ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx",
1228                                      drive->media, drive->atapi_flags);
1229
1230         cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1231                      CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1232                      CDC_MO_DRIVE | CDC_RAM);
1233
1234         if (drive->media == ide_optical) {
1235                 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1236                 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1237                                 drive->name);
1238                 return nslots;
1239         }
1240
1241         if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1242                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1243                 cdi->mask &= ~CDC_PLAY_AUDIO;
1244                 return nslots;
1245         }
1246
1247         /*
1248          * We have to cheat a little here. the packet will eventually be queued
1249          * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1250          * Since this device hasn't been registered with the Uniform layer yet,
1251          * it can't do this. Same goes for cdi->ops.
1252          */
1253         cdi->handle = drive;
1254         cdi->ops = &ide_cdrom_dops;
1255
1256         if (ide_cdrom_get_capabilities(drive, buf))
1257                 return 0;
1258
1259         if ((buf[8 + 6] & 0x01) == 0)
1260                 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1261         if (buf[8 + 6] & 0x08)
1262                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1263         if (buf[8 + 3] & 0x01)
1264                 cdi->mask &= ~CDC_CD_R;
1265         if (buf[8 + 3] & 0x02)
1266                 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1267         if (buf[8 + 2] & 0x38)
1268                 cdi->mask &= ~CDC_DVD;
1269         if (buf[8 + 3] & 0x20)
1270                 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1271         if (buf[8 + 3] & 0x10)
1272                 cdi->mask &= ~CDC_DVD_R;
1273         if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1274                 cdi->mask &= ~CDC_PLAY_AUDIO;
1275
1276         mechtype = buf[8 + 6] >> 5;
1277         if (mechtype == mechtype_caddy ||
1278             mechtype == mechtype_popup ||
1279             (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1280                 cdi->mask |= CDC_CLOSE_TRAY;
1281
1282         if (cdi->sanyo_slot > 0) {
1283                 cdi->mask &= ~CDC_SELECT_DISC;
1284                 nslots = 3;
1285         } else if (mechtype == mechtype_individual_changer ||
1286                    mechtype == mechtype_cartridge_changer) {
1287                 nslots = cdrom_number_of_slots(cdi);
1288                 if (nslots > 1)
1289                         cdi->mask &= ~CDC_SELECT_DISC;
1290         }
1291
1292         ide_cdrom_update_speed(drive, buf);
1293
1294         printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1295
1296         /* don't print speed if the drive reported 0 */
1297         if (cd->max_speed)
1298                 printk(KERN_CONT " %dX", cd->max_speed);
1299
1300         printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1301
1302         if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1303                 printk(KERN_CONT " DVD%s%s",
1304                                  (cdi->mask & CDC_DVD_R) ? "" : "-R",
1305                                  (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1306
1307         if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1308                 printk(KERN_CONT " CD%s%s",
1309                                  (cdi->mask & CDC_CD_R) ? "" : "-R",
1310                                  (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1311
1312         if ((cdi->mask & CDC_SELECT_DISC) == 0)
1313                 printk(KERN_CONT " changer w/%d slots", nslots);
1314         else
1315                 printk(KERN_CONT " drive");
1316
1317         printk(KERN_CONT ", %dkB Cache\n",
1318                          be16_to_cpup((__be16 *)&buf[8 + 12]));
1319
1320         return nslots;
1321 }
1322
1323 /* standard prep_rq_fn that builds 10 byte cmds */
1324 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1325 {
1326         int hard_sect = queue_logical_block_size(q);
1327         long block = (long)blk_rq_pos(rq) / (hard_sect >> 9);
1328         unsigned long blocks = blk_rq_sectors(rq) / (hard_sect >> 9);
1329         struct scsi_request *req = scsi_req(rq);
1330
1331         memset(req->cmd, 0, BLK_MAX_CDB);
1332
1333         if (rq_data_dir(rq) == READ)
1334                 req->cmd[0] = GPCMD_READ_10;
1335         else
1336                 req->cmd[0] = GPCMD_WRITE_10;
1337
1338         /*
1339          * fill in lba
1340          */
1341         req->cmd[2] = (block >> 24) & 0xff;
1342         req->cmd[3] = (block >> 16) & 0xff;
1343         req->cmd[4] = (block >>  8) & 0xff;
1344         req->cmd[5] = block & 0xff;
1345
1346         /*
1347          * and transfer length
1348          */
1349         req->cmd[7] = (blocks >> 8) & 0xff;
1350         req->cmd[8] = blocks & 0xff;
1351         req->cmd_len = 10;
1352         return BLKPREP_OK;
1353 }
1354
1355 /*
1356  * Most of the SCSI commands are supported directly by ATAPI devices.
1357  * This transform handles the few exceptions.
1358  */
1359 static int ide_cdrom_prep_pc(struct request *rq)
1360 {
1361         u8 *c = scsi_req(rq)->cmd;
1362
1363         /* transform 6-byte read/write commands to the 10-byte version */
1364         if (c[0] == READ_6 || c[0] == WRITE_6) {
1365                 c[8] = c[4];
1366                 c[5] = c[3];
1367                 c[4] = c[2];
1368                 c[3] = c[1] & 0x1f;
1369                 c[2] = 0;
1370                 c[1] &= 0xe0;
1371                 c[0] += (READ_10 - READ_6);
1372                 scsi_req(rq)->cmd_len = 10;
1373                 return BLKPREP_OK;
1374         }
1375
1376         /*
1377          * it's silly to pretend we understand 6-byte sense commands, just
1378          * reject with ILLEGAL_REQUEST and the caller should take the
1379          * appropriate action
1380          */
1381         if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1382                 scsi_req(rq)->result = ILLEGAL_REQUEST;
1383                 return BLKPREP_KILL;
1384         }
1385
1386         return BLKPREP_OK;
1387 }
1388
1389 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1390 {
1391         if (!blk_rq_is_passthrough(rq))
1392                 return ide_cdrom_prep_fs(q, rq);
1393         else if (blk_rq_is_scsi(rq))
1394                 return ide_cdrom_prep_pc(rq);
1395
1396         return 0;
1397 }
1398
1399 struct cd_list_entry {
1400         const char      *id_model;
1401         const char      *id_firmware;
1402         unsigned int    cd_flags;
1403 };
1404
1405 #ifdef CONFIG_IDE_PROC_FS
1406 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1407 {
1408         unsigned long capacity, sectors_per_frame;
1409
1410         if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1411                 return 0;
1412
1413         return capacity * sectors_per_frame;
1414 }
1415
1416 static int idecd_capacity_proc_show(struct seq_file *m, void *v)
1417 {
1418         ide_drive_t *drive = m->private;
1419
1420         seq_printf(m, "%llu\n", (long long)ide_cdrom_capacity(drive));
1421         return 0;
1422 }
1423
1424 static int idecd_capacity_proc_open(struct inode *inode, struct file *file)
1425 {
1426         return single_open(file, idecd_capacity_proc_show, PDE_DATA(inode));
1427 }
1428
1429 static const struct file_operations idecd_capacity_proc_fops = {
1430         .owner          = THIS_MODULE,
1431         .open           = idecd_capacity_proc_open,
1432         .read           = seq_read,
1433         .llseek         = seq_lseek,
1434         .release        = single_release,
1435 };
1436
1437 static ide_proc_entry_t idecd_proc[] = {
1438         { "capacity", S_IFREG|S_IRUGO, &idecd_capacity_proc_fops },
1439         {}
1440 };
1441
1442 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1443 {
1444         return idecd_proc;
1445 }
1446
1447 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1448 {
1449         return NULL;
1450 }
1451 #endif
1452
1453 static const struct cd_list_entry ide_cd_quirks_list[] = {
1454         /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1455         { "SAMSUNG CD-ROM SCR-3231", NULL,   IDE_AFLAG_NO_SPEED_SELECT       },
1456         /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1457         { "NEC CD-ROM DRIVE:260",    "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1458                                              IDE_AFLAG_PRE_ATAPI12,          },
1459         /* Vertos 300, some versions of this drive like to talk BCD. */
1460         { "V003S0DS",                NULL,   IDE_AFLAG_VERTOS_300_SSD,       },
1461         /* Vertos 600 ESD. */
1462         { "V006E0DS",                NULL,   IDE_AFLAG_VERTOS_600_ESD,       },
1463         /*
1464          * Sanyo 3 CD changer uses a non-standard command for CD changing
1465          * (by default standard ATAPI support for CD changers is used).
1466          */
1467         { "CD-ROM CDR-C3 G",         NULL,   IDE_AFLAG_SANYO_3CD             },
1468         { "CD-ROM CDR-C3G",          NULL,   IDE_AFLAG_SANYO_3CD             },
1469         { "CD-ROM CDR_C36",          NULL,   IDE_AFLAG_SANYO_3CD             },
1470         /* Stingray 8X CD-ROM. */
1471         { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1472         /*
1473          * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1474          * mode sense page capabilities size, but older drives break.
1475          */
1476         { "ATAPI CD ROM DRIVE 50X MAX", NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1477         { "WPI CDS-32X",                NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1478         /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1479         { "",                        "241N", IDE_AFLAG_LE_SPEED_FIELDS       },
1480         /*
1481          * Some drives used by Apple don't advertise audio play
1482          * but they do support reading TOC & audio datas.
1483          */
1484         { "MATSHITADVD-ROM SR-8187", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1485         { "MATSHITADVD-ROM SR-8186", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1486         { "MATSHITADVD-ROM SR-8176", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1487         { "MATSHITADVD-ROM SR-8174", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1488         { "Optiarc DVD RW AD-5200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1489         { "Optiarc DVD RW AD-7200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1490         { "Optiarc DVD RW AD-7543A", NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1491         { "TEAC CD-ROM CD-224E",     NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1492         { NULL, NULL, 0 }
1493 };
1494
1495 static unsigned int ide_cd_flags(u16 *id)
1496 {
1497         const struct cd_list_entry *cle = ide_cd_quirks_list;
1498
1499         while (cle->id_model) {
1500                 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1501                     (cle->id_firmware == NULL ||
1502                      strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1503                         return cle->cd_flags;
1504                 cle++;
1505         }
1506
1507         return 0;
1508 }
1509
1510 static int ide_cdrom_setup(ide_drive_t *drive)
1511 {
1512         struct cdrom_info *cd = drive->driver_data;
1513         struct cdrom_device_info *cdi = &cd->devinfo;
1514         struct request_queue *q = drive->queue;
1515         u16 *id = drive->id;
1516         char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1517         int nslots;
1518
1519         ide_debug_log(IDE_DBG_PROBE, "enter");
1520
1521         blk_queue_prep_rq(q, ide_cdrom_prep_fn);
1522         blk_queue_dma_alignment(q, 31);
1523         blk_queue_update_dma_pad(q, 15);
1524
1525         drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1526         drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1527
1528         if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1529             fw_rev[4] == '1' && fw_rev[6] <= '2')
1530                 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1531                                      IDE_AFLAG_TOCADDR_AS_BCD);
1532         else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1533                  fw_rev[4] == '1' && fw_rev[6] <= '2')
1534                 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1535         else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1536                 /* 3 => use CD in slot 0 */
1537                 cdi->sanyo_slot = 3;
1538
1539         nslots = ide_cdrom_probe_capabilities(drive);
1540
1541         blk_queue_logical_block_size(q, CD_FRAMESIZE);
1542
1543         if (ide_cdrom_register(drive, nslots)) {
1544                 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1545                                 " cdrom driver.\n", drive->name, __func__);
1546                 cd->devinfo.handle = NULL;
1547                 return 1;
1548         }
1549
1550         ide_proc_register_driver(drive, cd->driver);
1551         return 0;
1552 }
1553
1554 static void ide_cd_remove(ide_drive_t *drive)
1555 {
1556         struct cdrom_info *info = drive->driver_data;
1557
1558         ide_debug_log(IDE_DBG_FUNC, "enter");
1559
1560         ide_proc_unregister_driver(drive, info->driver);
1561         device_del(&info->dev);
1562         del_gendisk(info->disk);
1563
1564         mutex_lock(&idecd_ref_mutex);
1565         put_device(&info->dev);
1566         mutex_unlock(&idecd_ref_mutex);
1567 }
1568
1569 static void ide_cd_release(struct device *dev)
1570 {
1571         struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
1572         struct cdrom_device_info *devinfo = &info->devinfo;
1573         ide_drive_t *drive = info->drive;
1574         struct gendisk *g = info->disk;
1575
1576         ide_debug_log(IDE_DBG_FUNC, "enter");
1577
1578         kfree(info->toc);
1579         if (devinfo->handle == drive)
1580                 unregister_cdrom(devinfo);
1581         drive->driver_data = NULL;
1582         blk_queue_prep_rq(drive->queue, NULL);
1583         g->private_data = NULL;
1584         put_disk(g);
1585         kfree(info);
1586 }
1587
1588 static int ide_cd_probe(ide_drive_t *);
1589
1590 static struct ide_driver ide_cdrom_driver = {
1591         .gen_driver = {
1592                 .owner          = THIS_MODULE,
1593                 .name           = "ide-cdrom",
1594                 .bus            = &ide_bus_type,
1595         },
1596         .probe                  = ide_cd_probe,
1597         .remove                 = ide_cd_remove,
1598         .version                = IDECD_VERSION,
1599         .do_request             = ide_cd_do_request,
1600 #ifdef CONFIG_IDE_PROC_FS
1601         .proc_entries           = ide_cd_proc_entries,
1602         .proc_devsets           = ide_cd_proc_devsets,
1603 #endif
1604 };
1605
1606 static int idecd_open(struct block_device *bdev, fmode_t mode)
1607 {
1608         struct cdrom_info *info;
1609         int rc = -ENXIO;
1610
1611         mutex_lock(&ide_cd_mutex);
1612         info = ide_cd_get(bdev->bd_disk);
1613         if (!info)
1614                 goto out;
1615
1616         rc = cdrom_open(&info->devinfo, bdev, mode);
1617         if (rc < 0)
1618                 ide_cd_put(info);
1619 out:
1620         mutex_unlock(&ide_cd_mutex);
1621         return rc;
1622 }
1623
1624 static void idecd_release(struct gendisk *disk, fmode_t mode)
1625 {
1626         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1627
1628         mutex_lock(&ide_cd_mutex);
1629         cdrom_release(&info->devinfo, mode);
1630
1631         ide_cd_put(info);
1632         mutex_unlock(&ide_cd_mutex);
1633 }
1634
1635 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1636 {
1637         struct packet_command cgc;
1638         char buffer[16];
1639         int stat;
1640         char spindown;
1641
1642         if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1643                 return -EFAULT;
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         buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1652         return cdrom_mode_select(cdi, &cgc);
1653 }
1654
1655 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1656 {
1657         struct packet_command cgc;
1658         char buffer[16];
1659         int stat;
1660         char spindown;
1661
1662         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1663
1664         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1665         if (stat)
1666                 return stat;
1667
1668         spindown = buffer[11] & 0x0f;
1669         if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1670                 return -EFAULT;
1671         return 0;
1672 }
1673
1674 static int idecd_locked_ioctl(struct block_device *bdev, fmode_t mode,
1675                         unsigned int cmd, unsigned long arg)
1676 {
1677         struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1678         int err;
1679
1680         switch (cmd) {
1681         case CDROMSETSPINDOWN:
1682                 return idecd_set_spindown(&info->devinfo, arg);
1683         case CDROMGETSPINDOWN:
1684                 return idecd_get_spindown(&info->devinfo, arg);
1685         default:
1686                 break;
1687         }
1688
1689         err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1690         if (err == -EINVAL)
1691                 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
1692
1693         return err;
1694 }
1695
1696 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1697                              unsigned int cmd, unsigned long arg)
1698 {
1699         int ret;
1700
1701         mutex_lock(&ide_cd_mutex);
1702         ret = idecd_locked_ioctl(bdev, mode, cmd, arg);
1703         mutex_unlock(&ide_cd_mutex);
1704
1705         return ret;
1706 }
1707
1708
1709 static unsigned int idecd_check_events(struct gendisk *disk,
1710                                        unsigned int clearing)
1711 {
1712         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1713         return cdrom_check_events(&info->devinfo, clearing);
1714 }
1715
1716 static int idecd_revalidate_disk(struct gendisk *disk)
1717 {
1718         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1719         struct request_sense sense;
1720
1721         ide_cd_read_toc(info->drive, &sense);
1722
1723         return  0;
1724 }
1725
1726 static const struct block_device_operations idecd_ops = {
1727         .owner                  = THIS_MODULE,
1728         .open                   = idecd_open,
1729         .release                = idecd_release,
1730         .ioctl                  = idecd_ioctl,
1731         .check_events           = idecd_check_events,
1732         .revalidate_disk        = idecd_revalidate_disk
1733 };
1734
1735 /* module options */
1736 static unsigned long debug_mask;
1737 module_param(debug_mask, ulong, 0644);
1738
1739 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1740
1741 static int ide_cd_probe(ide_drive_t *drive)
1742 {
1743         struct cdrom_info *info;
1744         struct gendisk *g;
1745         struct request_sense sense;
1746
1747         ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x",
1748                                      drive->driver_req, drive->media);
1749
1750         if (!strstr("ide-cdrom", drive->driver_req))
1751                 goto failed;
1752
1753         if (drive->media != ide_cdrom && drive->media != ide_optical)
1754                 goto failed;
1755
1756         drive->debug_mask = debug_mask;
1757         drive->irq_handler = cdrom_newpc_intr;
1758
1759         info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
1760         if (info == NULL) {
1761                 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
1762                                 drive->name);
1763                 goto failed;
1764         }
1765
1766         g = alloc_disk(1 << PARTN_BITS);
1767         if (!g)
1768                 goto out_free_cd;
1769
1770         ide_init_disk(g, drive);
1771
1772         info->dev.parent = &drive->gendev;
1773         info->dev.release = ide_cd_release;
1774         dev_set_name(&info->dev, "%s", dev_name(&drive->gendev));
1775
1776         if (device_register(&info->dev))
1777                 goto out_free_disk;
1778
1779         info->drive = drive;
1780         info->driver = &ide_cdrom_driver;
1781         info->disk = g;
1782
1783         g->private_data = &info->driver;
1784
1785         drive->driver_data = info;
1786
1787         g->minors = 1;
1788         g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
1789         if (ide_cdrom_setup(drive)) {
1790                 put_device(&info->dev);
1791                 goto failed;
1792         }
1793
1794         ide_cd_read_toc(drive, &sense);
1795         g->fops = &idecd_ops;
1796         g->flags |= GENHD_FL_REMOVABLE | GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE;
1797         device_add_disk(&drive->gendev, g);
1798         return 0;
1799
1800 out_free_disk:
1801         put_disk(g);
1802 out_free_cd:
1803         kfree(info);
1804 failed:
1805         return -ENODEV;
1806 }
1807
1808 static void __exit ide_cdrom_exit(void)
1809 {
1810         driver_unregister(&ide_cdrom_driver.gen_driver);
1811 }
1812
1813 static int __init ide_cdrom_init(void)
1814 {
1815         printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
1816         return driver_register(&ide_cdrom_driver.gen_driver);
1817 }
1818
1819 MODULE_ALIAS("ide:*m-cdrom*");
1820 MODULE_ALIAS("ide-cd");
1821 module_init(ide_cdrom_init);
1822 module_exit(ide_cdrom_exit);
1823 MODULE_LICENSE("GPL");