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, "ide_req(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 = ide_req(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_mq_requeue_request(rq, false);
 262                 blk_mq_delay_kick_requeue_list(drive->queue, 1);
 263                 return 1;
 264         }
 265 }
 266
 267 static void ide_cd_free_sense(ide_drive_t *drive)
 268 {
 269         if (!drive->sense_rq)
 270                 return;
 271
 272         blk_mq_free_request(drive->sense_rq);
 273         drive->sense_rq = NULL;
 274         drive->sense_rq_armed = false;
 275 }
 276
 277 /**
 278  * Returns:
 279  * 0: if the request should be continued.
 280  * 1: if the request will be going through error recovery.
 281  * 2: if the request should be ended.
 282  */
 283 static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
 284 {
 285         ide_hwif_t *hwif = drive->hwif;
 286         struct request *rq = hwif->rq;
 287         int err, sense_key, do_end_request = 0;
 288
 289         /* get the IDE error register */
 290         err = ide_read_error(drive);
 291         sense_key = err >> 4;
 292
 293         ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, rq->cmd_type: 0x%x, err: 0x%x, "
 294                                   "stat 0x%x",
 295                                   rq->cmd[0], rq->cmd_type, err, stat);
 296
 297         if (ata_sense_request(rq)) {
 298                 /*
 299                  * We got an error trying to get sense info from the drive
 300                  * (probably while trying to recover from a former error).
 301                  * Just give up.
 302                  */
 303                 rq->rq_flags |= RQF_FAILED;
 304                 return 2;
 305         }
 306
 307         /* if we have an error, pass CHECK_CONDITION as the SCSI status byte */
 308         if (blk_rq_is_scsi(rq) && !scsi_req(rq)->result)
 309                 scsi_req(rq)->result = SAM_STAT_CHECK_CONDITION;
 310
 311         if (blk_noretry_request(rq))
 312                 do_end_request = 1;
 313
 314         switch (sense_key) {
 315         case NOT_READY:
 316                 if (req_op(rq) == REQ_OP_WRITE) {
 317                         if (ide_cd_breathe(drive, rq))
 318                                 return 1;
 319                 } else {
 320                         cdrom_saw_media_change(drive);
 321
 322                         if (!blk_rq_is_passthrough(rq) &&
 323                             !(rq->rq_flags & RQF_QUIET))
 324                                 printk(KERN_ERR PFX "%s: tray open\n",
 325                                         drive->name);
 326                 }
 327                 do_end_request = 1;
 328                 break;
 329         case UNIT_ATTENTION:
 330                 cdrom_saw_media_change(drive);
 331
 332                 if (blk_rq_is_passthrough(rq))
 333                         return 0;
 334
 335                 /*
 336                  * Arrange to retry the request but be sure to give up if we've
 337                  * retried too many times.
 338                  */
 339                 if (++scsi_req(rq)->result > ERROR_MAX)
 340                         do_end_request = 1;
 341                 break;
 342         case ILLEGAL_REQUEST:
 343                 /*
 344                  * Don't print error message for this condition -- SFF8090i
 345                  * indicates that 5/24/00 is the correct response to a request
 346                  * to close the tray if the drive doesn't have that capability.
 347                  *
 348                  * cdrom_log_sense() knows this!
 349                  */
 350                 if (scsi_req(rq)->cmd[0] == GPCMD_START_STOP_UNIT)
 351                         break;
 352                 /* fall-through */
 353         case DATA_PROTECT:
 354                 /*
 355                  * No point in retrying after an illegal request or data
 356                  * protect error.
 357                  */
 358                 if (!(rq->rq_flags & RQF_QUIET))
 359                         ide_dump_status(drive, "command error", stat);
 360                 do_end_request = 1;
 361                 break;
 362         case MEDIUM_ERROR:
 363                 /*
 364                  * No point in re-trying a zillion times on a bad sector.
 365                  * If we got here the error is not correctable.
 366                  */
 367                 if (!(rq->rq_flags & RQF_QUIET))
 368                         ide_dump_status(drive, "media error "
 369                                         "(bad sector)", stat);
 370                 do_end_request = 1;
 371                 break;
 372         case BLANK_CHECK:
 373                 /* disk appears blank? */
 374                 if (!(rq->rq_flags & RQF_QUIET))
 375                         ide_dump_status(drive, "media error (blank)",
 376                                         stat);
 377                 do_end_request = 1;
 378                 break;
 379         default:
 380                 if (blk_rq_is_passthrough(rq))
 381                         break;
 382                 if (err & ~ATA_ABORTED) {
 383                         /* go to the default handler for other errors */
 384                         ide_error(drive, "cdrom_decode_status", stat);
 385                         return 1;
 386                 } else if (++scsi_req(rq)->result > ERROR_MAX)
 387                         /* we've racked up too many retries, abort */
 388                         do_end_request = 1;
 389         }
 390
 391         if (blk_rq_is_passthrough(rq)) {
 392                 rq->rq_flags |= RQF_FAILED;
 393                 do_end_request = 1;
 394         }
 395
 396         /*
 397          * End a request through request sense analysis when we have sense data.
 398          * We need this in order to perform end of media processing.
 399          */
 400         if (do_end_request)
 401                 goto end_request;
 402
 403         /* if we got a CHECK_CONDITION status, queue a request sense command */
 404         if (stat & ATA_ERR)
 405                 return ide_queue_sense_rq(drive, NULL) ? 2 : 1;
 406         return 1;
 407
 408 end_request:
 409         if (stat & ATA_ERR) {
 410                 hwif->rq = NULL;
 411                 return ide_queue_sense_rq(drive, rq) ? 2 : 1;
 412         } else
 413                 return 2;
 414 }
 415
 416 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct ide_cmd *cmd)
 417 {
 418         struct request *rq = cmd->rq;
 419
 420         ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]);
 421
 422         /*
 423          * Some of the trailing request sense fields are optional,
 424          * and some drives don't send them.  Sigh.
 425          */
 426         if (scsi_req(rq)->cmd[0] == GPCMD_REQUEST_SENSE &&
 427             cmd->nleft > 0 && cmd->nleft <= 5)
 428                 cmd->nleft = 0;
 429 }
 430
 431 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
 432                     int write, void *buffer, unsigned *bufflen,
 433                     struct scsi_sense_hdr *sshdr, int timeout,
 434                     req_flags_t rq_flags)
 435 {
 436         struct cdrom_info *info = drive->driver_data;
 437         struct scsi_sense_hdr local_sshdr;
 438         int retries = 10;
 439         bool failed;
 440
 441         ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, "
 442                                   "rq_flags: 0x%x",
 443                                   cmd[0], write, timeout, rq_flags);
 444
 445         if (!sshdr)
 446                 sshdr = &local_sshdr;
 447
 448         /* start of retry loop */
 449         do {
 450                 struct request *rq;
 451                 int error;
 452                 bool delay = false;
 453
 454                 rq = blk_get_request(drive->queue,
 455                         write ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0);
 456                 memcpy(scsi_req(rq)->cmd, cmd, BLK_MAX_CDB);
 457                 ide_req(rq)->type = ATA_PRIV_PC;
 458                 rq->rq_flags |= rq_flags;
 459                 rq->timeout = timeout;
 460                 if (buffer) {
 461                         error = blk_rq_map_kern(drive->queue, rq, buffer,
 462                                                 *bufflen, GFP_NOIO);
 463                         if (error) {
 464                                 blk_put_request(rq);
 465                                 return error;
 466                         }
 467                 }
 468
 469                 blk_execute_rq(drive->queue, info->disk, rq, 0);
 470                 error = scsi_req(rq)->result ? -EIO : 0;
 471
 472                 if (buffer)
 473                         *bufflen = scsi_req(rq)->resid_len;
 474                 scsi_normalize_sense(scsi_req(rq)->sense,
 475                                      scsi_req(rq)->sense_len, sshdr);
 476
 477                 /*
 478                  * FIXME: we should probably abort/retry or something in case of
 479                  * failure.
 480                  */
 481                 failed = (rq->rq_flags & RQF_FAILED) != 0;
 482                 if (failed) {
 483                         /*
 484                          * The request failed.  Retry if it was due to a unit
 485                          * attention status (usually means media was changed).
 486                          */
 487                         if (sshdr->sense_key == UNIT_ATTENTION)
 488                                 cdrom_saw_media_change(drive);
 489                         else if (sshdr->sense_key == NOT_READY &&
 490                                  sshdr->asc == 4 && sshdr->ascq != 4) {
 491                                 /*
 492                                  * The drive is in the process of loading
 493                                  * a disk.  Retry, but wait a little to give
 494                                  * the drive time to complete the load.
 495                                  */
 496                                 delay = true;
 497                         } else {
 498                                 /* otherwise, don't retry */
 499                                 retries = 0;
 500                         }
 501                         --retries;
 502                 }
 503                 blk_put_request(rq);
 504                 if (delay)
 505                         ssleep(2);
 506         } while (failed && retries >= 0);
 507
 508         /* return an error if the command failed */
 509         return failed ? -EIO : 0;
 510 }
 511
 512 /*
 513  * returns true if rq has been completed
 514  */
 515 static bool ide_cd_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
 516 {
 517         unsigned int nr_bytes = cmd->nbytes - cmd->nleft;
 518
 519         if (cmd->tf_flags & IDE_TFLAG_WRITE)
 520                 nr_bytes -= cmd->last_xfer_len;
 521
 522         if (nr_bytes > 0) {
 523                 ide_complete_rq(drive, BLK_STS_OK, nr_bytes);
 524                 return true;
 525         }
 526
 527         return false;
 528 }
 529
 530 /* standard prep_rq that builds 10 byte cmds */
 531 static bool ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
 532 {
 533         int hard_sect = queue_logical_block_size(q);
 534         long block = (long)blk_rq_pos(rq) / (hard_sect >> 9);
 535         unsigned long blocks = blk_rq_sectors(rq) / (hard_sect >> 9);
 536         struct scsi_request *req = scsi_req(rq);
 537
 538         if (rq_data_dir(rq) == READ)
 539                 req->cmd[0] = GPCMD_READ_10;
 540         else
 541                 req->cmd[0] = GPCMD_WRITE_10;
 542
 543         /*
 544          * fill in lba
 545          */
 546         req->cmd[2] = (block >> 24) & 0xff;
 547         req->cmd[3] = (block >> 16) & 0xff;
 548         req->cmd[4] = (block >>  8) & 0xff;
 549         req->cmd[5] = block & 0xff;
 550
 551         /*
 552          * and transfer length
 553          */
 554         req->cmd[7] = (blocks >> 8) & 0xff;
 555         req->cmd[8] = blocks & 0xff;
 556         req->cmd_len = 10;
 557         return true;
 558 }
 559
 560 /*
 561  * Most of the SCSI commands are supported directly by ATAPI devices.
 562  * This transform handles the few exceptions.
 563  */
 564 static bool ide_cdrom_prep_pc(struct request *rq)
 565 {
 566         u8 *c = scsi_req(rq)->cmd;
 567
 568         /* transform 6-byte read/write commands to the 10-byte version */
 569         if (c[0] == READ_6 || c[0] == WRITE_6) {
 570                 c[8] = c[4];
 571                 c[5] = c[3];
 572                 c[4] = c[2];
 573                 c[3] = c[1] & 0x1f;
 574                 c[2] = 0;
 575                 c[1] &= 0xe0;
 576                 c[0] += (READ_10 - READ_6);
 577                 scsi_req(rq)->cmd_len = 10;
 578                 return true;
 579         }
 580
 581         /*
 582          * it's silly to pretend we understand 6-byte sense commands, just
 583          * reject with ILLEGAL_REQUEST and the caller should take the
 584          * appropriate action
 585          */
 586         if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
 587                 scsi_req(rq)->result = ILLEGAL_REQUEST;
 588                 return false;
 589         }
 590
 591         return true;
 592 }
 593
 594 static bool ide_cdrom_prep_rq(ide_drive_t *drive, struct request *rq)
 595 {
 596         if (!blk_rq_is_passthrough(rq)) {
 597                 scsi_req_init(scsi_req(rq));
 598
 599                 return ide_cdrom_prep_fs(drive->queue, rq);
 600         } else if (blk_rq_is_scsi(rq))
 601                 return ide_cdrom_prep_pc(rq);
 602
 603         return true;
 604 }
 605
 606 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 607 {
 608         ide_hwif_t *hwif = drive->hwif;
 609         struct ide_cmd *cmd = &hwif->cmd;
 610         struct request *rq = hwif->rq;
 611         ide_expiry_t *expiry = NULL;
 612         int dma_error = 0, dma, thislen, uptodate = 0;
 613         int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc = 0;
 614         int sense = ata_sense_request(rq);
 615         unsigned int timeout;
 616         u16 len;
 617         u8 ireason, stat;
 618
 619         ide_debug_log(IDE_DBG_PC, "cmd: 0x%x, write: 0x%x", rq->cmd[0], write);
 620
 621         /* check for errors */
 622         dma = drive->dma;
 623         if (dma) {
 624                 drive->dma = 0;
 625                 drive->waiting_for_dma = 0;
 626                 dma_error = hwif->dma_ops->dma_end(drive);
 627                 ide_dma_unmap_sg(drive, cmd);
 628                 if (dma_error) {
 629                         printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
 630                                         write ? "write" : "read");
 631                         ide_dma_off(drive);
 632                 }
 633         }
 634
 635         /* check status */
 636         stat = hwif->tp_ops->read_status(hwif);
 637
 638         if (!OK_STAT(stat, 0, BAD_R_STAT)) {
 639                 rc = cdrom_decode_status(drive, stat);
 640                 if (rc) {
 641                         if (rc == 2)
 642                                 goto out_end;
 643                         return ide_stopped;
 644                 }
 645         }
 646
 647         /* using dma, transfer is complete now */
 648         if (dma) {
 649                 if (dma_error)
 650                         return ide_error(drive, "dma error", stat);
 651                 uptodate = 1;
 652                 goto out_end;
 653         }
 654
 655         ide_read_bcount_and_ireason(drive, &len, &ireason);
 656
 657         thislen = !blk_rq_is_passthrough(rq) ? len : cmd->nleft;
 658         if (thislen > len)
 659                 thislen = len;
 660
 661         ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d",
 662                                   stat, thislen);
 663
 664         /* If DRQ is clear, the command has completed. */
 665         if ((stat & ATA_DRQ) == 0) {
 666                 switch (req_op(rq)) {
 667                 default:
 668                         /*
 669                          * If we're not done reading/writing, complain.
 670                          * Otherwise, complete the command normally.
 671                          */
 672                         uptodate = 1;
 673                         if (cmd->nleft > 0) {
 674                                 printk(KERN_ERR PFX "%s: %s: data underrun "
 675                                         "(%u bytes)\n", drive->name, __func__,
 676                                         cmd->nleft);
 677                                 if (!write)
 678                                         rq->rq_flags |= RQF_FAILED;
 679                                 uptodate = 0;
 680                         }
 681                         goto out_end;
 682                 case REQ_OP_DRV_IN:
 683                 case REQ_OP_DRV_OUT:
 684                         ide_cd_request_sense_fixup(drive, cmd);
 685
 686                         uptodate = cmd->nleft ? 0 : 1;
 687
 688                         /*
 689                          * suck out the remaining bytes from the drive in an
 690                          * attempt to complete the data xfer. (see BZ#13399)
 691                          */
 692                         if (!(stat & ATA_ERR) && !uptodate && thislen) {
 693                                 ide_pio_bytes(drive, cmd, write, thislen);
 694                                 uptodate = cmd->nleft ? 0 : 1;
 695                         }
 696
 697                         if (!uptodate)
 698                                 rq->rq_flags |= RQF_FAILED;
 699                         goto out_end;
 700                 case REQ_OP_SCSI_IN:
 701                 case REQ_OP_SCSI_OUT:
 702                         goto out_end;
 703                 }
 704         }
 705
 706         rc = ide_check_ireason(drive, rq, len, ireason, write);
 707         if (rc)
 708                 goto out_end;
 709
 710         cmd->last_xfer_len = 0;
 711
 712         ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, "
 713                                   "ireason: 0x%x",
 714                                   rq->cmd_type, ireason);
 715
 716         /* transfer data */
 717         while (thislen > 0) {
 718                 int blen = min_t(int, thislen, cmd->nleft);
 719
 720                 if (cmd->nleft == 0)
 721                         break;
 722
 723                 ide_pio_bytes(drive, cmd, write, blen);
 724                 cmd->last_xfer_len += blen;
 725
 726                 thislen -= blen;
 727                 len -= blen;
 728
 729                 if (sense && write == 0)
 730                         scsi_req(rq)->sense_len += blen;
 731         }
 732
 733         /* pad, if necessary */
 734         if (len > 0) {
 735                 if (blk_rq_is_passthrough(rq) || write == 0)
 736                         ide_pad_transfer(drive, write, len);
 737                 else {
 738                         printk(KERN_ERR PFX "%s: confused, missing data\n",
 739                                 drive->name);
 740                         blk_dump_rq_flags(rq, "cdrom_newpc_intr");
 741                 }
 742         }
 743
 744         switch (req_op(rq)) {
 745         case REQ_OP_SCSI_IN:
 746         case REQ_OP_SCSI_OUT:
 747                 timeout = rq->timeout;
 748                 break;
 749         case REQ_OP_DRV_IN:
 750         case REQ_OP_DRV_OUT:
 751                 expiry = ide_cd_expiry;
 752                 /*FALLTHRU*/
 753         default:
 754                 timeout = ATAPI_WAIT_PC;
 755                 break;
 756         }
 757
 758         hwif->expiry = expiry;
 759         ide_set_handler(drive, cdrom_newpc_intr, timeout);
 760         return ide_started;
 761
 762 out_end:
 763         if (blk_rq_is_scsi(rq) && rc == 0) {
 764                 scsi_req(rq)->resid_len = 0;
 765                 blk_mq_end_request(rq, BLK_STS_OK);
 766                 hwif->rq = NULL;
 767         } else {
 768                 if (sense && uptodate)
 769                         ide_cd_complete_failed_rq(drive, rq);
 770
 771                 if (!blk_rq_is_passthrough(rq)) {
 772                         if (cmd->nleft == 0)
 773                                 uptodate = 1;
 774                 } else {
 775                         if (uptodate <= 0 && scsi_req(rq)->result == 0)
 776                                 scsi_req(rq)->result = -EIO;
 777                 }
 778
 779                 if (uptodate == 0 && rq->bio)
 780                         if (ide_cd_error_cmd(drive, cmd))
 781                                 return ide_stopped;
 782
 783                 /* make sure it's fully ended */
 784                 if (blk_rq_is_passthrough(rq)) {
 785                         scsi_req(rq)->resid_len -= cmd->nbytes - cmd->nleft;
 786                         if (uptodate == 0 && (cmd->tf_flags & IDE_TFLAG_WRITE))
 787                                 scsi_req(rq)->resid_len += cmd->last_xfer_len;
 788                 }
 789
 790                 ide_complete_rq(drive, uptodate ? BLK_STS_OK : BLK_STS_IOERR, blk_rq_bytes(rq));
 791
 792                 if (sense && rc == 2)
 793                         ide_error(drive, "request sense failure", stat);
 794         }
 795
 796         ide_cd_free_sense(drive);
 797         return ide_stopped;
 798 }
 799
 800 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
 801 {
 802         struct cdrom_info *cd = drive->driver_data;
 803         struct request_queue *q = drive->queue;
 804         int write = rq_data_dir(rq) == WRITE;
 805         unsigned short sectors_per_frame =
 806                 queue_logical_block_size(q) >> SECTOR_SHIFT;
 807
 808         ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, rq->cmd_flags: 0x%x, "
 809                                   "secs_per_frame: %u",
 810                                   rq->cmd[0], rq->cmd_flags, sectors_per_frame);
 811
 812         if (write) {
 813                 /* disk has become write protected */
 814                 if (get_disk_ro(cd->disk))
 815                         return ide_stopped;
 816         } else {
 817                 /*
 818                  * We may be retrying this request after an error.  Fix up any
 819                  * weirdness which might be present in the request packet.
 820                  */
 821                 ide_cdrom_prep_rq(drive, rq);
 822         }
 823
 824         /* fs requests *must* be hardware frame aligned */
 825         if ((blk_rq_sectors(rq) & (sectors_per_frame - 1)) ||
 826             (blk_rq_pos(rq) & (sectors_per_frame - 1)))
 827                 return ide_stopped;
 828
 829         /* use DMA, if possible */
 830         drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
 831
 832         if (write)
 833                 cd->devinfo.media_written = 1;
 834
 835         rq->timeout = ATAPI_WAIT_PC;
 836
 837         return ide_started;
 838 }
 839
 840 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
 841 {
 842
 843         ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
 844                                   rq->cmd[0], rq->cmd_type);
 845
 846         if (blk_rq_is_scsi(rq))
 847                 rq->rq_flags |= RQF_QUIET;
 848         else
 849                 rq->rq_flags &= ~RQF_FAILED;
 850
 851         drive->dma = 0;
 852
 853         /* sg request */
 854         if (rq->bio) {
 855                 struct request_queue *q = drive->queue;
 856                 char *buf = bio_data(rq->bio);
 857                 unsigned int alignment;
 858
 859                 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
 860
 861                 /*
 862                  * check if dma is safe
 863                  *
 864                  * NOTE! The "len" and "addr" checks should possibly have
 865                  * separate masks.
 866                  */
 867                 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
 868                 if ((unsigned long)buf & alignment
 869                     || blk_rq_bytes(rq) & q->dma_pad_mask
 870                     || object_is_on_stack(buf))
 871                         drive->dma = 0;
 872         }
 873 }
 874
 875 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
 876                                         sector_t block)
 877 {
 878         struct ide_cmd cmd;
 879         int uptodate = 0;
 880         unsigned int nsectors;
 881
 882         ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
 883                                   rq->cmd[0], (unsigned long long)block);
 884
 885         if (drive->debug_mask & IDE_DBG_RQ)
 886                 blk_dump_rq_flags(rq, "ide_cd_do_request");
 887
 888         switch (req_op(rq)) {
 889         default:
 890                 if (cdrom_start_rw(drive, rq) == ide_stopped)
 891                         goto out_end;
 892                 break;
 893         case REQ_OP_SCSI_IN:
 894         case REQ_OP_SCSI_OUT:
 895         handle_pc:
 896                 if (!rq->timeout)
 897                         rq->timeout = ATAPI_WAIT_PC;
 898                 cdrom_do_block_pc(drive, rq);
 899                 break;
 900         case REQ_OP_DRV_IN:
 901         case REQ_OP_DRV_OUT:
 902                 switch (ide_req(rq)->type) {
 903                 case ATA_PRIV_MISC:
 904                         /* right now this can only be a reset... */
 905                         uptodate = 1;
 906                         goto out_end;
 907                 case ATA_PRIV_SENSE:
 908                 case ATA_PRIV_PC:
 909                         goto handle_pc;
 910                 default:
 911                         BUG();
 912                 }
 913         }
 914
 915         /* prepare sense request for this command */
 916         ide_prep_sense(drive, rq);
 917
 918         memset(&cmd, 0, sizeof(cmd));
 919
 920         if (rq_data_dir(rq))
 921                 cmd.tf_flags |= IDE_TFLAG_WRITE;
 922
 923         cmd.rq = rq;
 924
 925         if (!blk_rq_is_passthrough(rq) || blk_rq_bytes(rq)) {
 926                 ide_init_sg_cmd(&cmd, blk_rq_bytes(rq));
 927                 ide_map_sg(drive, &cmd);
 928         }
 929
 930         return ide_issue_pc(drive, &cmd);
 931 out_end:
 932         nsectors = blk_rq_sectors(rq);
 933
 934         if (nsectors == 0)
 935                 nsectors = 1;
 936
 937         ide_complete_rq(drive, uptodate ? BLK_STS_OK : BLK_STS_IOERR, nsectors << 9);
 938
 939         return ide_stopped;
 940 }
 941
 942 /*
 943  * Ioctl handling.
 944  *
 945  * Routines which queue packet commands take as a final argument a pointer to a
 946  * request_sense struct. If execution of the command results in an error with a
 947  * CHECK CONDITION status, this structure will be filled with the results of the
 948  * subsequent request sense command. The pointer can also be NULL, in which case
 949  * no sense information is returned.
 950  */
 951 static void msf_from_bcd(struct atapi_msf *msf)
 952 {
 953         msf->minute = bcd2bin(msf->minute);
 954         msf->second = bcd2bin(msf->second);
 955         msf->frame  = bcd2bin(msf->frame);
 956 }
 957
 958 int cdrom_check_status(ide_drive_t *drive, struct scsi_sense_hdr *sshdr)
 959 {
 960         struct cdrom_info *info = drive->driver_data;
 961         struct cdrom_device_info *cdi;
 962         unsigned char cmd[BLK_MAX_CDB];
 963
 964         ide_debug_log(IDE_DBG_FUNC, "enter");
 965
 966         if (!info)
 967                 return -EIO;
 968
 969         cdi = &info->devinfo;
 970
 971         memset(cmd, 0, BLK_MAX_CDB);
 972         cmd[0] = GPCMD_TEST_UNIT_READY;
 973
 974         /*
 975          * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
 976          * instead of supporting the LOAD_UNLOAD opcode.
 977          */
 978         cmd[7] = cdi->sanyo_slot % 3;
 979
 980         return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sshdr, 0, RQF_QUIET);
 981 }
 982
 983 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
 984                                unsigned long *sectors_per_frame)
 985 {
 986         struct {
 987                 __be32 lba;
 988                 __be32 blocklen;
 989         } capbuf;
 990
 991         int stat;
 992         unsigned char cmd[BLK_MAX_CDB];
 993         unsigned len = sizeof(capbuf);
 994         u32 blocklen;
 995
 996         ide_debug_log(IDE_DBG_FUNC, "enter");
 997
 998         memset(cmd, 0, BLK_MAX_CDB);
 999         cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1000
1001         stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, NULL, 0,
1002                                RQF_QUIET);
1003         if (stat)
1004                 return stat;
1005
1006         /*
1007          * Sanity check the given block size, in so far as making
1008          * sure the sectors_per_frame we give to the caller won't
1009          * end up being bogus.
1010          */
1011         blocklen = be32_to_cpu(capbuf.blocklen);
1012         blocklen = (blocklen >> SECTOR_SHIFT) << SECTOR_SHIFT;
1013         switch (blocklen) {
1014         case 512:
1015         case 1024:
1016         case 2048:
1017         case 4096:
1018                 break;
1019         default:
1020                 printk_once(KERN_ERR PFX "%s: weird block size %u; "
1021                                 "setting default block size to 2048\n",
1022                                 drive->name, blocklen);
1023                 blocklen = 2048;
1024                 break;
1025         }
1026
1027         *capacity = 1 + be32_to_cpu(capbuf.lba);
1028         *sectors_per_frame = blocklen >> SECTOR_SHIFT;
1029
1030         ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu",
1031                                      *capacity, *sectors_per_frame);
1032
1033         return 0;
1034 }
1035
1036 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1037                                 int format, char *buf, int buflen)
1038 {
1039         unsigned char cmd[BLK_MAX_CDB];
1040
1041         ide_debug_log(IDE_DBG_FUNC, "enter");
1042
1043         memset(cmd, 0, BLK_MAX_CDB);
1044
1045         cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1046         cmd[6] = trackno;
1047         cmd[7] = (buflen >> 8);
1048         cmd[8] = (buflen & 0xff);
1049         cmd[9] = (format << 6);
1050
1051         if (msf_flag)
1052                 cmd[1] = 2;
1053
1054         return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, NULL, 0, RQF_QUIET);
1055 }
1056
1057 /* Try to read the entire TOC for the disk into our internal buffer. */
1058 int ide_cd_read_toc(ide_drive_t *drive)
1059 {
1060         int stat, ntracks, i;
1061         struct cdrom_info *info = drive->driver_data;
1062         struct cdrom_device_info *cdi = &info->devinfo;
1063         struct atapi_toc *toc = info->toc;
1064         struct {
1065                 struct atapi_toc_header hdr;
1066                 struct atapi_toc_entry  ent;
1067         } ms_tmp;
1068         long last_written;
1069         unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1070
1071         ide_debug_log(IDE_DBG_FUNC, "enter");
1072
1073         if (toc == NULL) {
1074                 /* try to allocate space */
1075                 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1076                 if (toc == NULL) {
1077                         printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
1078                                         drive->name);
1079                         return -ENOMEM;
1080                 }
1081                 info->toc = toc;
1082         }
1083
1084         /*
1085          * Check to see if the existing data is still valid. If it is,
1086          * just return.
1087          */
1088         (void) cdrom_check_status(drive, NULL);
1089
1090         if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
1091                 return 0;
1092
1093         /* try to get the total cdrom capacity and sector size */
1094         stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame);
1095         if (stat)
1096                 toc->capacity = 0x1fffff;
1097
1098         set_capacity(info->disk, toc->capacity * sectors_per_frame);
1099         /* save a private copy of the TOC capacity for error handling */
1100         drive->probed_capacity = toc->capacity * sectors_per_frame;
1101
1102         blk_queue_logical_block_size(drive->queue,
1103                                      sectors_per_frame << SECTOR_SHIFT);
1104
1105         /* first read just the header, so we know how long the TOC is */
1106         stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1107                                     sizeof(struct atapi_toc_header));
1108         if (stat)
1109                 return stat;
1110
1111         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1112                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1113                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1114         }
1115
1116         ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1117         if (ntracks <= 0)
1118                 return -EIO;
1119         if (ntracks > MAX_TRACKS)
1120                 ntracks = MAX_TRACKS;
1121
1122         /* now read the whole schmeer */
1123         stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1124                                   (char *)&toc->hdr,
1125                                    sizeof(struct atapi_toc_header) +
1126                                    (ntracks + 1) *
1127                                    sizeof(struct atapi_toc_entry));
1128
1129         if (stat && toc->hdr.first_track > 1) {
1130                 /*
1131                  * Cds with CDI tracks only don't have any TOC entries, despite
1132                  * of this the returned values are
1133                  * first_track == last_track = number of CDI tracks + 1,
1134                  * so that this case is indistinguishable from the same layout
1135                  * plus an additional audio track. If we get an error for the
1136                  * regular case, we assume a CDI without additional audio
1137                  * tracks. In this case the readable TOC is empty (CDI tracks
1138                  * are not included) and only holds the Leadout entry.
1139                  *
1140                  * Heiko Eißfeldt.
1141                  */
1142                 ntracks = 0;
1143                 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1144                                            (char *)&toc->hdr,
1145                                            sizeof(struct atapi_toc_header) +
1146                                            (ntracks + 1) *
1147                                            sizeof(struct atapi_toc_entry));
1148                 if (stat)
1149                         return stat;
1150
1151                 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1152                         toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1153                         toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1154                 } else {
1155                         toc->hdr.first_track = CDROM_LEADOUT;
1156                         toc->hdr.last_track = CDROM_LEADOUT;
1157                 }
1158         }
1159
1160         if (stat)
1161                 return stat;
1162
1163         toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1164
1165         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1166                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1167                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1168         }
1169
1170         for (i = 0; i <= ntracks; i++) {
1171                 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1172                         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1173                                 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1174                         msf_from_bcd(&toc->ent[i].addr.msf);
1175                 }
1176                 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1177                                                   toc->ent[i].addr.msf.second,
1178                                                   toc->ent[i].addr.msf.frame);
1179         }
1180
1181         if (toc->hdr.first_track != CDROM_LEADOUT) {
1182                 /* read the multisession information */
1183                 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1184                                            sizeof(ms_tmp));
1185                 if (stat)
1186                         return stat;
1187
1188                 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1189         } else {
1190                 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1191                 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1192                 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1193         }
1194
1195         if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1196                 /* re-read multisession information using MSF format */
1197                 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1198                                            sizeof(ms_tmp));
1199                 if (stat)
1200                         return stat;
1201
1202                 msf_from_bcd(&ms_tmp.ent.addr.msf);
1203                 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1204                                                    ms_tmp.ent.addr.msf.second,
1205                                                    ms_tmp.ent.addr.msf.frame);
1206         }
1207
1208         toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1209
1210         /* now try to get the total cdrom capacity */
1211         stat = cdrom_get_last_written(cdi, &last_written);
1212         if (!stat && (last_written > toc->capacity)) {
1213                 toc->capacity = last_written;
1214                 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1215                 drive->probed_capacity = toc->capacity * sectors_per_frame;
1216         }
1217
1218         /* Remember that we've read this stuff. */
1219         drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1220
1221         return 0;
1222 }
1223
1224 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1225 {
1226         struct cdrom_info *info = drive->driver_data;
1227         struct cdrom_device_info *cdi = &info->devinfo;
1228         struct packet_command cgc;
1229         int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1230
1231         ide_debug_log(IDE_DBG_FUNC, "enter");
1232
1233         if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1234                 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1235
1236         init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1237         do {
1238                 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1239                 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1240                 if (!stat)
1241                         break;
1242         } while (--attempts);
1243         return stat;
1244 }
1245
1246 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1247 {
1248         struct cdrom_info *cd = drive->driver_data;
1249         u16 curspeed, maxspeed;
1250
1251         ide_debug_log(IDE_DBG_FUNC, "enter");
1252
1253         if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1254                 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1255                 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1256         } else {
1257                 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1258                 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1259         }
1260
1261         ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u",
1262                                      curspeed, maxspeed);
1263
1264         cd->current_speed = DIV_ROUND_CLOSEST(curspeed, 176);
1265         cd->max_speed = DIV_ROUND_CLOSEST(maxspeed, 176);
1266 }
1267
1268 #define IDE_CD_CAPABILITIES \
1269         (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1270          CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1271          CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1272          CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1273          CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1274
1275 static const struct cdrom_device_ops ide_cdrom_dops = {
1276         .open                   = ide_cdrom_open_real,
1277         .release                = ide_cdrom_release_real,
1278         .drive_status           = ide_cdrom_drive_status,
1279         .check_events           = ide_cdrom_check_events_real,
1280         .tray_move              = ide_cdrom_tray_move,
1281         .lock_door              = ide_cdrom_lock_door,
1282         .select_speed           = ide_cdrom_select_speed,
1283         .get_last_session       = ide_cdrom_get_last_session,
1284         .get_mcn                = ide_cdrom_get_mcn,
1285         .reset                  = ide_cdrom_reset,
1286         .audio_ioctl            = ide_cdrom_audio_ioctl,
1287         .capability             = IDE_CD_CAPABILITIES,
1288         .generic_packet         = ide_cdrom_packet,
1289 };
1290
1291 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1292 {
1293         struct cdrom_info *info = drive->driver_data;
1294         struct cdrom_device_info *devinfo = &info->devinfo;
1295
1296         ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots);
1297
1298         devinfo->ops = &ide_cdrom_dops;
1299         devinfo->speed = info->current_speed;
1300         devinfo->capacity = nslots;
1301         devinfo->handle = drive;
1302         strcpy(devinfo->name, drive->name);
1303
1304         if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1305                 devinfo->mask |= CDC_SELECT_SPEED;
1306
1307         devinfo->disk = info->disk;
1308         return register_cdrom(devinfo);
1309 }
1310
1311 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1312 {
1313         struct cdrom_info *cd = drive->driver_data;
1314         struct cdrom_device_info *cdi = &cd->devinfo;
1315         u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1316         mechtype_t mechtype;
1317         int nslots = 1;
1318
1319         ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx",
1320                                      drive->media, drive->atapi_flags);
1321
1322         cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1323                      CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1324                      CDC_MO_DRIVE | CDC_RAM);
1325
1326         if (drive->media == ide_optical) {
1327                 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1328                 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1329                                 drive->name);
1330                 return nslots;
1331         }
1332
1333         if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1334                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1335                 cdi->mask &= ~CDC_PLAY_AUDIO;
1336                 return nslots;
1337         }
1338
1339         /*
1340          * We have to cheat a little here. the packet will eventually be queued
1341          * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1342          * Since this device hasn't been registered with the Uniform layer yet,
1343          * it can't do this. Same goes for cdi->ops.
1344          */
1345         cdi->handle = drive;
1346         cdi->ops = &ide_cdrom_dops;
1347
1348         if (ide_cdrom_get_capabilities(drive, buf))
1349                 return 0;
1350
1351         if ((buf[8 + 6] & 0x01) == 0)
1352                 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1353         if (buf[8 + 6] & 0x08)
1354                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1355         if (buf[8 + 3] & 0x01)
1356                 cdi->mask &= ~CDC_CD_R;
1357         if (buf[8 + 3] & 0x02)
1358                 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1359         if (buf[8 + 2] & 0x38)
1360                 cdi->mask &= ~CDC_DVD;
1361         if (buf[8 + 3] & 0x20)
1362                 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1363         if (buf[8 + 3] & 0x10)
1364                 cdi->mask &= ~CDC_DVD_R;
1365         if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1366                 cdi->mask &= ~CDC_PLAY_AUDIO;
1367
1368         mechtype = buf[8 + 6] >> 5;
1369         if (mechtype == mechtype_caddy ||
1370             mechtype == mechtype_popup ||
1371             (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1372                 cdi->mask |= CDC_CLOSE_TRAY;
1373
1374         if (cdi->sanyo_slot > 0) {
1375                 cdi->mask &= ~CDC_SELECT_DISC;
1376                 nslots = 3;
1377         } else if (mechtype == mechtype_individual_changer ||
1378                    mechtype == mechtype_cartridge_changer) {
1379                 nslots = cdrom_number_of_slots(cdi);
1380                 if (nslots > 1)
1381                         cdi->mask &= ~CDC_SELECT_DISC;
1382         }
1383
1384         ide_cdrom_update_speed(drive, buf);
1385
1386         printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1387
1388         /* don't print speed if the drive reported 0 */
1389         if (cd->max_speed)
1390                 printk(KERN_CONT " %dX", cd->max_speed);
1391
1392         printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1393
1394         if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1395                 printk(KERN_CONT " DVD%s%s",
1396                                  (cdi->mask & CDC_DVD_R) ? "" : "-R",
1397                                  (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1398
1399         if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1400                 printk(KERN_CONT " CD%s%s",
1401                                  (cdi->mask & CDC_CD_R) ? "" : "-R",
1402                                  (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1403
1404         if ((cdi->mask & CDC_SELECT_DISC) == 0)
1405                 printk(KERN_CONT " changer w/%d slots", nslots);
1406         else
1407                 printk(KERN_CONT " drive");
1408
1409         printk(KERN_CONT ", %dkB Cache\n",
1410                          be16_to_cpup((__be16 *)&buf[8 + 12]));
1411
1412         return nslots;
1413 }
1414
1415 struct cd_list_entry {
1416         const char      *id_model;
1417         const char      *id_firmware;
1418         unsigned int    cd_flags;
1419 };
1420
1421 #ifdef CONFIG_IDE_PROC_FS
1422 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1423 {
1424         unsigned long capacity, sectors_per_frame;
1425
1426         if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame))
1427                 return 0;
1428
1429         return capacity * sectors_per_frame;
1430 }
1431
1432 static int idecd_capacity_proc_show(struct seq_file *m, void *v)
1433 {
1434         ide_drive_t *drive = m->private;
1435
1436         seq_printf(m, "%llu\n", (long long)ide_cdrom_capacity(drive));
1437         return 0;
1438 }
1439
1440 static ide_proc_entry_t idecd_proc[] = {
1441         { "capacity", S_IFREG|S_IRUGO, idecd_capacity_proc_show },
1442         {}
1443 };
1444
1445 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1446 {
1447         return idecd_proc;
1448 }
1449
1450 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1451 {
1452         return NULL;
1453 }
1454 #endif
1455
1456 static 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
1498 static 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
1513 static 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         drive->prep_rq = ide_cdrom_prep_rq;
1525         blk_queue_dma_alignment(q, 31);
1526         blk_queue_update_dma_pad(q, 15);
1527
1528         drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1529         drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1530
1531         if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1532             fw_rev[4] == '1' && fw_rev[6] <= '2')
1533                 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1534                                      IDE_AFLAG_TOCADDR_AS_BCD);
1535         else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1536                  fw_rev[4] == '1' && fw_rev[6] <= '2')
1537                 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1538         else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1539                 /* 3 => use CD in slot 0 */
1540                 cdi->sanyo_slot = 3;
1541
1542         nslots = ide_cdrom_probe_capabilities(drive);
1543
1544         blk_queue_logical_block_size(q, CD_FRAMESIZE);
1545
1546         if (ide_cdrom_register(drive, nslots)) {
1547                 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1548                                 " cdrom driver.\n", drive->name, __func__);
1549                 cd->devinfo.handle = NULL;
1550                 return 1;
1551         }
1552
1553         ide_proc_register_driver(drive, cd->driver);
1554         return 0;
1555 }
1556
1557 static void ide_cd_remove(ide_drive_t *drive)
1558 {
1559         struct cdrom_info *info = drive->driver_data;
1560
1561         ide_debug_log(IDE_DBG_FUNC, "enter");
1562
1563         ide_proc_unregister_driver(drive, info->driver);
1564         device_del(&info->dev);
1565         del_gendisk(info->disk);
1566
1567         mutex_lock(&idecd_ref_mutex);
1568         put_device(&info->dev);
1569         mutex_unlock(&idecd_ref_mutex);
1570 }
1571
1572 static void ide_cd_release(struct device *dev)
1573 {
1574         struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
1575         struct cdrom_device_info *devinfo = &info->devinfo;
1576         ide_drive_t *drive = info->drive;
1577         struct gendisk *g = info->disk;
1578
1579         ide_debug_log(IDE_DBG_FUNC, "enter");
1580
1581         kfree(info->toc);
1582         if (devinfo->handle == drive)
1583                 unregister_cdrom(devinfo);
1584         drive->driver_data = NULL;
1585         drive->prep_rq = NULL;
1586         g->private_data = NULL;
1587         put_disk(g);
1588         kfree(info);
1589 }
1590
1591 static int ide_cd_probe(ide_drive_t *);
1592
1593 static struct ide_driver ide_cdrom_driver = {
1594         .gen_driver = {
1595                 .owner          = THIS_MODULE,
1596                 .name           = "ide-cdrom",
1597                 .bus            = &ide_bus_type,
1598         },
1599         .probe                  = ide_cd_probe,
1600         .remove                 = ide_cd_remove,
1601         .version                = IDECD_VERSION,
1602         .do_request             = ide_cd_do_request,
1603 #ifdef CONFIG_IDE_PROC_FS
1604         .proc_entries           = ide_cd_proc_entries,
1605         .proc_devsets           = ide_cd_proc_devsets,
1606 #endif
1607 };
1608
1609 static int idecd_open(struct block_device *bdev, fmode_t mode)
1610 {
1611         struct cdrom_info *info;
1612         int rc = -ENXIO;
1613
1614         check_disk_change(bdev);
1615
1616         mutex_lock(&ide_cd_mutex);
1617         info = ide_cd_get(bdev->bd_disk);
1618         if (!info)
1619                 goto out;
1620
1621         rc = cdrom_open(&info->devinfo, bdev, mode);
1622         if (rc < 0)
1623                 ide_cd_put(info);
1624 out:
1625         mutex_unlock(&ide_cd_mutex);
1626         return rc;
1627 }
1628
1629 static void idecd_release(struct gendisk *disk, fmode_t mode)
1630 {
1631         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1632
1633         mutex_lock(&ide_cd_mutex);
1634         cdrom_release(&info->devinfo, mode);
1635
1636         ide_cd_put(info);
1637         mutex_unlock(&ide_cd_mutex);
1638 }
1639
1640 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1641 {
1642         struct packet_command cgc;
1643         char buffer[16];
1644         int stat;
1645         char spindown;
1646
1647         if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1648                 return -EFAULT;
1649
1650         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1651
1652         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1653         if (stat)
1654                 return stat;
1655
1656         buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1657         return cdrom_mode_select(cdi, &cgc);
1658 }
1659
1660 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1661 {
1662         struct packet_command cgc;
1663         char buffer[16];
1664         int stat;
1665         char spindown;
1666
1667         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1668
1669         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1670         if (stat)
1671                 return stat;
1672
1673         spindown = buffer[11] & 0x0f;
1674         if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1675                 return -EFAULT;
1676         return 0;
1677 }
1678
1679 static int idecd_locked_ioctl(struct block_device *bdev, fmode_t mode,
1680                         unsigned int cmd, unsigned long arg)
1681 {
1682         struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1683         int err;
1684
1685         switch (cmd) {
1686         case CDROMSETSPINDOWN:
1687                 return idecd_set_spindown(&info->devinfo, arg);
1688         case CDROMGETSPINDOWN:
1689                 return idecd_get_spindown(&info->devinfo, arg);
1690         default:
1691                 break;
1692         }
1693
1694         err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1695         if (err == -EINVAL)
1696                 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
1697
1698         return err;
1699 }
1700
1701 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1702                              unsigned int cmd, unsigned long arg)
1703 {
1704         int ret;
1705
1706         mutex_lock(&ide_cd_mutex);
1707         ret = idecd_locked_ioctl(bdev, mode, cmd, arg);
1708         mutex_unlock(&ide_cd_mutex);
1709
1710         return ret;
1711 }
1712
1713
1714 static unsigned int idecd_check_events(struct gendisk *disk,
1715                                        unsigned int clearing)
1716 {
1717         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1718         return cdrom_check_events(&info->devinfo, clearing);
1719 }
1720
1721 static int idecd_revalidate_disk(struct gendisk *disk)
1722 {
1723         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1724
1725         ide_cd_read_toc(info->drive);
1726
1727         return  0;
1728 }
1729
1730 static const struct block_device_operations idecd_ops = {
1731         .owner                  = THIS_MODULE,
1732         .open                   = idecd_open,
1733         .release                = idecd_release,
1734         .ioctl                  = idecd_ioctl,
1735         .check_events           = idecd_check_events,
1736         .revalidate_disk        = idecd_revalidate_disk
1737 };
1738
1739 /* module options */
1740 static unsigned long debug_mask;
1741 module_param(debug_mask, ulong, 0644);
1742
1743 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1744
1745 static int ide_cd_probe(ide_drive_t *drive)
1746 {
1747         struct cdrom_info *info;
1748         struct gendisk *g;
1749
1750         ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x",
1751                                      drive->driver_req, drive->media);
1752
1753         if (!strstr("ide-cdrom", drive->driver_req))
1754                 goto failed;
1755
1756         if (drive->media != ide_cdrom && drive->media != ide_optical)
1757                 goto failed;
1758
1759         drive->debug_mask = debug_mask;
1760         drive->irq_handler = cdrom_newpc_intr;
1761
1762         info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
1763         if (info == NULL) {
1764                 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
1765                                 drive->name);
1766                 goto failed;
1767         }
1768
1769         g = alloc_disk(1 << PARTN_BITS);
1770         if (!g)
1771                 goto out_free_cd;
1772
1773         ide_init_disk(g, drive);
1774
1775         info->dev.parent = &drive->gendev;
1776         info->dev.release = ide_cd_release;
1777         dev_set_name(&info->dev, "%s", dev_name(&drive->gendev));
1778
1779         if (device_register(&info->dev))
1780                 goto out_free_disk;
1781
1782         info->drive = drive;
1783         info->driver = &ide_cdrom_driver;
1784         info->disk = g;
1785
1786         g->private_data = &info->driver;
1787
1788         drive->driver_data = info;
1789
1790         g->minors = 1;
1791         g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
1792         if (ide_cdrom_setup(drive)) {
1793                 put_device(&info->dev);
1794                 goto failed;
1795         }
1796
1797         ide_cd_read_toc(drive);
1798         g->fops = &idecd_ops;
1799         g->flags |= GENHD_FL_REMOVABLE | GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE;
1800         g->events = DISK_EVENT_MEDIA_CHANGE;
1801         device_add_disk(&drive->gendev, g, NULL);
1802         return 0;
1803
1804 out_free_disk:
1805         put_disk(g);
1806 out_free_cd:
1807         kfree(info);
1808 failed:
1809         return -ENODEV;
1810 }
1811
1812 static void __exit ide_cdrom_exit(void)
1813 {
1814         driver_unregister(&ide_cdrom_driver.gen_driver);
1815 }
1816
1817 static int __init ide_cdrom_init(void)
1818 {
1819         printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
1820         return driver_register(&ide_cdrom_driver.gen_driver);
1821 }
1822
1823 MODULE_ALIAS("ide:*m-cdrom*");
1824 MODULE_ALIAS("ide-cd");
1825 module_init(ide_cdrom_init);
1826 module_exit(ide_cdrom_exit);
1827 MODULE_LICENSE("GPL");