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                 scsi_req_init(rq);
 442                 memcpy(scsi_req(rq)->cmd, cmd, BLK_MAX_CDB);
 443                 ide_req(rq)->type = ATA_PRIV_PC;
 444                 rq->rq_flags |= rq_flags;
 445                 rq->timeout = timeout;
 446                 if (buffer) {
 447                         error = blk_rq_map_kern(drive->queue, rq, buffer,
 448                                                 *bufflen, GFP_NOIO);
 449                         if (error) {
 450                                 blk_put_request(rq);
 451                                 return error;
 452                         }
 453                 }
 454
 455                 blk_execute_rq(drive->queue, info->disk, rq, 0);
 456                 error = scsi_req(rq)->result ? -EIO : 0;
 457
 458                 if (buffer)
 459                         *bufflen = scsi_req(rq)->resid_len;
 460                 if (sense)
 461                         memcpy(sense, scsi_req(rq)->sense, sizeof(*sense));
 462
 463                 /*
 464                  * FIXME: we should probably abort/retry or something in case of
 465                  * failure.
 466                  */
 467                 failed = (rq->rq_flags & RQF_FAILED) != 0;
 468                 if (failed) {
 469                         /*
 470                          * The request failed.  Retry if it was due to a unit
 471                          * attention status (usually means media was changed).
 472                          */
 473                         struct request_sense *reqbuf = scsi_req(rq)->sense;
 474
 475                         if (reqbuf->sense_key == UNIT_ATTENTION)
 476                                 cdrom_saw_media_change(drive);
 477                         else if (reqbuf->sense_key == NOT_READY &&
 478                                  reqbuf->asc == 4 && reqbuf->ascq != 4) {
 479                                 /*
 480                                  * The drive is in the process of loading
 481                                  * a disk.  Retry, but wait a little to give
 482                                  * the drive time to complete the load.
 483                                  */
 484                                 delay = true;
 485                         } else {
 486                                 /* otherwise, don't retry */
 487                                 retries = 0;
 488                         }
 489                         --retries;
 490                 }
 491                 blk_put_request(rq);
 492                 if (delay)
 493                         ssleep(2);
 494         } while (failed && retries >= 0);
 495
 496         /* return an error if the command failed */
 497         return failed ? -EIO : 0;
 498 }
 499
 500 /*
 501  * returns true if rq has been completed
 502  */
 503 static bool ide_cd_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
 504 {
 505         unsigned int nr_bytes = cmd->nbytes - cmd->nleft;
 506
 507         if (cmd->tf_flags & IDE_TFLAG_WRITE)
 508                 nr_bytes -= cmd->last_xfer_len;
 509
 510         if (nr_bytes > 0) {
 511                 ide_complete_rq(drive, BLK_STS_OK, nr_bytes);
 512                 return true;
 513         }
 514
 515         return false;
 516 }
 517
 518 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 519 {
 520         ide_hwif_t *hwif = drive->hwif;
 521         struct ide_cmd *cmd = &hwif->cmd;
 522         struct request *rq = hwif->rq;
 523         ide_expiry_t *expiry = NULL;
 524         int dma_error = 0, dma, thislen, uptodate = 0;
 525         int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc = 0;
 526         int sense = ata_sense_request(rq);
 527         unsigned int timeout;
 528         u16 len;
 529         u8 ireason, stat;
 530
 531         ide_debug_log(IDE_DBG_PC, "cmd: 0x%x, write: 0x%x", rq->cmd[0], write);
 532
 533         /* check for errors */
 534         dma = drive->dma;
 535         if (dma) {
 536                 drive->dma = 0;
 537                 drive->waiting_for_dma = 0;
 538                 dma_error = hwif->dma_ops->dma_end(drive);
 539                 ide_dma_unmap_sg(drive, cmd);
 540                 if (dma_error) {
 541                         printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
 542                                         write ? "write" : "read");
 543                         ide_dma_off(drive);
 544                 }
 545         }
 546
 547         /* check status */
 548         stat = hwif->tp_ops->read_status(hwif);
 549
 550         if (!OK_STAT(stat, 0, BAD_R_STAT)) {
 551                 rc = cdrom_decode_status(drive, stat);
 552                 if (rc) {
 553                         if (rc == 2)
 554                                 goto out_end;
 555                         return ide_stopped;
 556                 }
 557         }
 558
 559         /* using dma, transfer is complete now */
 560         if (dma) {
 561                 if (dma_error)
 562                         return ide_error(drive, "dma error", stat);
 563                 uptodate = 1;
 564                 goto out_end;
 565         }
 566
 567         ide_read_bcount_and_ireason(drive, &len, &ireason);
 568
 569         thislen = !blk_rq_is_passthrough(rq) ? len : cmd->nleft;
 570         if (thislen > len)
 571                 thislen = len;
 572
 573         ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d",
 574                                   stat, thislen);
 575
 576         /* If DRQ is clear, the command has completed. */
 577         if ((stat & ATA_DRQ) == 0) {
 578                 switch (req_op(rq)) {
 579                 default:
 580                         /*
 581                          * If we're not done reading/writing, complain.
 582                          * Otherwise, complete the command normally.
 583                          */
 584                         uptodate = 1;
 585                         if (cmd->nleft > 0) {
 586                                 printk(KERN_ERR PFX "%s: %s: data underrun "
 587                                         "(%u bytes)\n", drive->name, __func__,
 588                                         cmd->nleft);
 589                                 if (!write)
 590                                         rq->rq_flags |= RQF_FAILED;
 591                                 uptodate = 0;
 592                         }
 593                         goto out_end;
 594                 case REQ_OP_DRV_IN:
 595                 case REQ_OP_DRV_OUT:
 596                         ide_cd_request_sense_fixup(drive, cmd);
 597
 598                         uptodate = cmd->nleft ? 0 : 1;
 599
 600                         /*
 601                          * suck out the remaining bytes from the drive in an
 602                          * attempt to complete the data xfer. (see BZ#13399)
 603                          */
 604                         if (!(stat & ATA_ERR) && !uptodate && thislen) {
 605                                 ide_pio_bytes(drive, cmd, write, thislen);
 606                                 uptodate = cmd->nleft ? 0 : 1;
 607                         }
 608
 609                         if (!uptodate)
 610                                 rq->rq_flags |= RQF_FAILED;
 611                         goto out_end;
 612                 case REQ_OP_SCSI_IN:
 613                 case REQ_OP_SCSI_OUT:
 614                         goto out_end;
 615                 }
 616         }
 617
 618         rc = ide_check_ireason(drive, rq, len, ireason, write);
 619         if (rc)
 620                 goto out_end;
 621
 622         cmd->last_xfer_len = 0;
 623
 624         ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, "
 625                                   "ireason: 0x%x",
 626                                   rq->cmd_type, ireason);
 627
 628         /* transfer data */
 629         while (thislen > 0) {
 630                 int blen = min_t(int, thislen, cmd->nleft);
 631
 632                 if (cmd->nleft == 0)
 633                         break;
 634
 635                 ide_pio_bytes(drive, cmd, write, blen);
 636                 cmd->last_xfer_len += blen;
 637
 638                 thislen -= blen;
 639                 len -= blen;
 640
 641                 if (sense && write == 0)
 642                         scsi_req(rq)->sense_len += blen;
 643         }
 644
 645         /* pad, if necessary */
 646         if (len > 0) {
 647                 if (blk_rq_is_passthrough(rq) || write == 0)
 648                         ide_pad_transfer(drive, write, len);
 649                 else {
 650                         printk(KERN_ERR PFX "%s: confused, missing data\n",
 651                                 drive->name);
 652                         blk_dump_rq_flags(rq, "cdrom_newpc_intr");
 653                 }
 654         }
 655
 656         switch (req_op(rq)) {
 657         case REQ_OP_SCSI_IN:
 658         case REQ_OP_SCSI_OUT:
 659                 timeout = rq->timeout;
 660                 break;
 661         case REQ_OP_DRV_IN:
 662         case REQ_OP_DRV_OUT:
 663                 expiry = ide_cd_expiry;
 664                 /*FALLTHRU*/
 665         default:
 666                 timeout = ATAPI_WAIT_PC;
 667                 break;
 668         }
 669
 670         hwif->expiry = expiry;
 671         ide_set_handler(drive, cdrom_newpc_intr, timeout);
 672         return ide_started;
 673
 674 out_end:
 675         if (blk_rq_is_scsi(rq) && rc == 0) {
 676                 scsi_req(rq)->resid_len = 0;
 677                 blk_end_request_all(rq, BLK_STS_OK);
 678                 hwif->rq = NULL;
 679         } else {
 680                 if (sense && uptodate)
 681                         ide_cd_complete_failed_rq(drive, rq);
 682
 683                 if (!blk_rq_is_passthrough(rq)) {
 684                         if (cmd->nleft == 0)
 685                                 uptodate = 1;
 686                 } else {
 687                         if (uptodate <= 0 && scsi_req(rq)->result == 0)
 688                                 scsi_req(rq)->result = -EIO;
 689                 }
 690
 691                 if (uptodate == 0 && rq->bio)
 692                         if (ide_cd_error_cmd(drive, cmd))
 693                                 return ide_stopped;
 694
 695                 /* make sure it's fully ended */
 696                 if (blk_rq_is_passthrough(rq)) {
 697                         scsi_req(rq)->resid_len -= cmd->nbytes - cmd->nleft;
 698                         if (uptodate == 0 && (cmd->tf_flags & IDE_TFLAG_WRITE))
 699                                 scsi_req(rq)->resid_len += cmd->last_xfer_len;
 700                 }
 701
 702                 ide_complete_rq(drive, uptodate ? BLK_STS_OK : BLK_STS_IOERR, blk_rq_bytes(rq));
 703
 704                 if (sense && rc == 2)
 705                         ide_error(drive, "request sense failure", stat);
 706         }
 707         return ide_stopped;
 708 }
 709
 710 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
 711 {
 712         struct cdrom_info *cd = drive->driver_data;
 713         struct request_queue *q = drive->queue;
 714         int write = rq_data_dir(rq) == WRITE;
 715         unsigned short sectors_per_frame =
 716                 queue_logical_block_size(q) >> SECTOR_BITS;
 717
 718         ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, rq->cmd_flags: 0x%x, "
 719                                   "secs_per_frame: %u",
 720                                   rq->cmd[0], rq->cmd_flags, sectors_per_frame);
 721
 722         if (write) {
 723                 /* disk has become write protected */
 724                 if (get_disk_ro(cd->disk))
 725                         return ide_stopped;
 726         } else {
 727                 /*
 728                  * We may be retrying this request after an error.  Fix up any
 729                  * weirdness which might be present in the request packet.
 730                  */
 731                 q->prep_rq_fn(q, rq);
 732         }
 733
 734         /* fs requests *must* be hardware frame aligned */
 735         if ((blk_rq_sectors(rq) & (sectors_per_frame - 1)) ||
 736             (blk_rq_pos(rq) & (sectors_per_frame - 1)))
 737                 return ide_stopped;
 738
 739         /* use DMA, if possible */
 740         drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
 741
 742         if (write)
 743                 cd->devinfo.media_written = 1;
 744
 745         rq->timeout = ATAPI_WAIT_PC;
 746
 747         return ide_started;
 748 }
 749
 750 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
 751 {
 752
 753         ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
 754                                   rq->cmd[0], rq->cmd_type);
 755
 756         if (blk_rq_is_scsi(rq))
 757                 rq->rq_flags |= RQF_QUIET;
 758         else
 759                 rq->rq_flags &= ~RQF_FAILED;
 760
 761         drive->dma = 0;
 762
 763         /* sg request */
 764         if (rq->bio) {
 765                 struct request_queue *q = drive->queue;
 766                 char *buf = bio_data(rq->bio);
 767                 unsigned int alignment;
 768
 769                 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
 770
 771                 /*
 772                  * check if dma is safe
 773                  *
 774                  * NOTE! The "len" and "addr" checks should possibly have
 775                  * separate masks.
 776                  */
 777                 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
 778                 if ((unsigned long)buf & alignment
 779                     || blk_rq_bytes(rq) & q->dma_pad_mask
 780                     || object_is_on_stack(buf))
 781                         drive->dma = 0;
 782         }
 783 }
 784
 785 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
 786                                         sector_t block)
 787 {
 788         struct ide_cmd cmd;
 789         int uptodate = 0;
 790         unsigned int nsectors;
 791
 792         ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
 793                                   rq->cmd[0], (unsigned long long)block);
 794
 795         if (drive->debug_mask & IDE_DBG_RQ)
 796                 blk_dump_rq_flags(rq, "ide_cd_do_request");
 797
 798         switch (req_op(rq)) {
 799         default:
 800                 if (cdrom_start_rw(drive, rq) == ide_stopped)
 801                         goto out_end;
 802                 break;
 803         case REQ_OP_SCSI_IN:
 804         case REQ_OP_SCSI_OUT:
 805         handle_pc:
 806                 if (!rq->timeout)
 807                         rq->timeout = ATAPI_WAIT_PC;
 808                 cdrom_do_block_pc(drive, rq);
 809                 break;
 810         case REQ_OP_DRV_IN:
 811         case REQ_OP_DRV_OUT:
 812                 switch (ide_req(rq)->type) {
 813                 case ATA_PRIV_MISC:
 814                         /* right now this can only be a reset... */
 815                         uptodate = 1;
 816                         goto out_end;
 817                 case ATA_PRIV_SENSE:
 818                 case ATA_PRIV_PC:
 819                         goto handle_pc;
 820                 default:
 821                         BUG();
 822                 }
 823         }
 824
 825         /* prepare sense request for this command */
 826         ide_prep_sense(drive, rq);
 827
 828         memset(&cmd, 0, sizeof(cmd));
 829
 830         if (rq_data_dir(rq))
 831                 cmd.tf_flags |= IDE_TFLAG_WRITE;
 832
 833         cmd.rq = rq;
 834
 835         if (!blk_rq_is_passthrough(rq) || blk_rq_bytes(rq)) {
 836                 ide_init_sg_cmd(&cmd, blk_rq_bytes(rq));
 837                 ide_map_sg(drive, &cmd);
 838         }
 839
 840         return ide_issue_pc(drive, &cmd);
 841 out_end:
 842         nsectors = blk_rq_sectors(rq);
 843
 844         if (nsectors == 0)
 845                 nsectors = 1;
 846
 847         ide_complete_rq(drive, uptodate ? BLK_STS_OK : BLK_STS_IOERR, nsectors << 9);
 848
 849         return ide_stopped;
 850 }
 851
 852 /*
 853  * Ioctl handling.
 854  *
 855  * Routines which queue packet commands take as a final argument a pointer to a
 856  * request_sense struct. If execution of the command results in an error with a
 857  * CHECK CONDITION status, this structure will be filled with the results of the
 858  * subsequent request sense command. The pointer can also be NULL, in which case
 859  * no sense information is returned.
 860  */
 861 static void msf_from_bcd(struct atapi_msf *msf)
 862 {
 863         msf->minute = bcd2bin(msf->minute);
 864         msf->second = bcd2bin(msf->second);
 865         msf->frame  = bcd2bin(msf->frame);
 866 }
 867
 868 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
 869 {
 870         struct cdrom_info *info = drive->driver_data;
 871         struct cdrom_device_info *cdi = &info->devinfo;
 872         unsigned char cmd[BLK_MAX_CDB];
 873
 874         ide_debug_log(IDE_DBG_FUNC, "enter");
 875
 876         memset(cmd, 0, BLK_MAX_CDB);
 877         cmd[0] = GPCMD_TEST_UNIT_READY;
 878
 879         /*
 880          * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
 881          * instead of supporting the LOAD_UNLOAD opcode.
 882          */
 883         cmd[7] = cdi->sanyo_slot % 3;
 884
 885         return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, RQF_QUIET);
 886 }
 887
 888 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
 889                                unsigned long *sectors_per_frame,
 890                                struct request_sense *sense)
 891 {
 892         struct {
 893                 __be32 lba;
 894                 __be32 blocklen;
 895         } capbuf;
 896
 897         int stat;
 898         unsigned char cmd[BLK_MAX_CDB];
 899         unsigned len = sizeof(capbuf);
 900         u32 blocklen;
 901
 902         ide_debug_log(IDE_DBG_FUNC, "enter");
 903
 904         memset(cmd, 0, BLK_MAX_CDB);
 905         cmd[0] = GPCMD_READ_CDVD_CAPACITY;
 906
 907         stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
 908                                RQF_QUIET);
 909         if (stat)
 910                 return stat;
 911
 912         /*
 913          * Sanity check the given block size, in so far as making
 914          * sure the sectors_per_frame we give to the caller won't
 915          * end up being bogus.
 916          */
 917         blocklen = be32_to_cpu(capbuf.blocklen);
 918         blocklen = (blocklen >> SECTOR_BITS) << SECTOR_BITS;
 919         switch (blocklen) {
 920         case 512:
 921         case 1024:
 922         case 2048:
 923         case 4096:
 924                 break;
 925         default:
 926                 printk_once(KERN_ERR PFX "%s: weird block size %u; "
 927                                 "setting default block size to 2048\n",
 928                                 drive->name, blocklen);
 929                 blocklen = 2048;
 930                 break;
 931         }
 932
 933         *capacity = 1 + be32_to_cpu(capbuf.lba);
 934         *sectors_per_frame = blocklen >> SECTOR_BITS;
 935
 936         ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu",
 937                                      *capacity, *sectors_per_frame);
 938
 939         return 0;
 940 }
 941
 942 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
 943                                 int format, char *buf, int buflen,
 944                                 struct request_sense *sense)
 945 {
 946         unsigned char cmd[BLK_MAX_CDB];
 947
 948         ide_debug_log(IDE_DBG_FUNC, "enter");
 949
 950         memset(cmd, 0, BLK_MAX_CDB);
 951
 952         cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
 953         cmd[6] = trackno;
 954         cmd[7] = (buflen >> 8);
 955         cmd[8] = (buflen & 0xff);
 956         cmd[9] = (format << 6);
 957
 958         if (msf_flag)
 959                 cmd[1] = 2;
 960
 961         return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, RQF_QUIET);
 962 }
 963
 964 /* Try to read the entire TOC for the disk into our internal buffer. */
 965 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
 966 {
 967         int stat, ntracks, i;
 968         struct cdrom_info *info = drive->driver_data;
 969         struct cdrom_device_info *cdi = &info->devinfo;
 970         struct atapi_toc *toc = info->toc;
 971         struct {
 972                 struct atapi_toc_header hdr;
 973                 struct atapi_toc_entry  ent;
 974         } ms_tmp;
 975         long last_written;
 976         unsigned long sectors_per_frame = SECTORS_PER_FRAME;
 977
 978         ide_debug_log(IDE_DBG_FUNC, "enter");
 979
 980         if (toc == NULL) {
 981                 /* try to allocate space */
 982                 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
 983                 if (toc == NULL) {
 984                         printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
 985                                         drive->name);
 986                         return -ENOMEM;
 987                 }
 988                 info->toc = toc;
 989         }
 990
 991         /*
 992          * Check to see if the existing data is still valid. If it is,
 993          * just return.
 994          */
 995         (void) cdrom_check_status(drive, sense);
 996
 997         if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
 998                 return 0;
 999
1000         /* try to get the total cdrom capacity and sector size */
1001         stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1002                                    sense);
1003         if (stat)
1004                 toc->capacity = 0x1fffff;
1005
1006         set_capacity(info->disk, toc->capacity * sectors_per_frame);
1007         /* save a private copy of the TOC capacity for error handling */
1008         drive->probed_capacity = toc->capacity * sectors_per_frame;
1009
1010         blk_queue_logical_block_size(drive->queue,
1011                                      sectors_per_frame << SECTOR_BITS);
1012
1013         /* first read just the header, so we know how long the TOC is */
1014         stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1015                                     sizeof(struct atapi_toc_header), sense);
1016         if (stat)
1017                 return stat;
1018
1019         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1020                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1021                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1022         }
1023
1024         ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1025         if (ntracks <= 0)
1026                 return -EIO;
1027         if (ntracks > MAX_TRACKS)
1028                 ntracks = MAX_TRACKS;
1029
1030         /* now read the whole schmeer */
1031         stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1032                                   (char *)&toc->hdr,
1033                                    sizeof(struct atapi_toc_header) +
1034                                    (ntracks + 1) *
1035                                    sizeof(struct atapi_toc_entry), sense);
1036
1037         if (stat && toc->hdr.first_track > 1) {
1038                 /*
1039                  * Cds with CDI tracks only don't have any TOC entries, despite
1040                  * of this the returned values are
1041                  * first_track == last_track = number of CDI tracks + 1,
1042                  * so that this case is indistinguishable from the same layout
1043                  * plus an additional audio track. If we get an error for the
1044                  * regular case, we assume a CDI without additional audio
1045                  * tracks. In this case the readable TOC is empty (CDI tracks
1046                  * are not included) and only holds the Leadout entry.
1047                  *
1048                  * Heiko Eißfeldt.
1049                  */
1050                 ntracks = 0;
1051                 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1052                                            (char *)&toc->hdr,
1053                                            sizeof(struct atapi_toc_header) +
1054                                            (ntracks + 1) *
1055                                            sizeof(struct atapi_toc_entry),
1056                                            sense);
1057                 if (stat)
1058                         return stat;
1059
1060                 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1061                         toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1062                         toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1063                 } else {
1064                         toc->hdr.first_track = CDROM_LEADOUT;
1065                         toc->hdr.last_track = CDROM_LEADOUT;
1066                 }
1067         }
1068
1069         if (stat)
1070                 return stat;
1071
1072         toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1073
1074         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1075                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1076                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1077         }
1078
1079         for (i = 0; i <= ntracks; i++) {
1080                 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1081                         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1082                                 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1083                         msf_from_bcd(&toc->ent[i].addr.msf);
1084                 }
1085                 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1086                                                   toc->ent[i].addr.msf.second,
1087                                                   toc->ent[i].addr.msf.frame);
1088         }
1089
1090         if (toc->hdr.first_track != CDROM_LEADOUT) {
1091                 /* read the multisession information */
1092                 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1093                                            sizeof(ms_tmp), sense);
1094                 if (stat)
1095                         return stat;
1096
1097                 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1098         } else {
1099                 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1100                 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1101                 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1102         }
1103
1104         if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1105                 /* re-read multisession information using MSF format */
1106                 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1107                                            sizeof(ms_tmp), sense);
1108                 if (stat)
1109                         return stat;
1110
1111                 msf_from_bcd(&ms_tmp.ent.addr.msf);
1112                 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1113                                                    ms_tmp.ent.addr.msf.second,
1114                                                    ms_tmp.ent.addr.msf.frame);
1115         }
1116
1117         toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1118
1119         /* now try to get the total cdrom capacity */
1120         stat = cdrom_get_last_written(cdi, &last_written);
1121         if (!stat && (last_written > toc->capacity)) {
1122                 toc->capacity = last_written;
1123                 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1124                 drive->probed_capacity = toc->capacity * sectors_per_frame;
1125         }
1126
1127         /* Remember that we've read this stuff. */
1128         drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1129
1130         return 0;
1131 }
1132
1133 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1134 {
1135         struct cdrom_info *info = drive->driver_data;
1136         struct cdrom_device_info *cdi = &info->devinfo;
1137         struct packet_command cgc;
1138         int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1139
1140         ide_debug_log(IDE_DBG_FUNC, "enter");
1141
1142         if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1143                 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1144
1145         init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1146         do {
1147                 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1148                 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1149                 if (!stat)
1150                         break;
1151         } while (--attempts);
1152         return stat;
1153 }
1154
1155 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1156 {
1157         struct cdrom_info *cd = drive->driver_data;
1158         u16 curspeed, maxspeed;
1159
1160         ide_debug_log(IDE_DBG_FUNC, "enter");
1161
1162         if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1163                 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1164                 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1165         } else {
1166                 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1167                 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1168         }
1169
1170         ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u",
1171                                      curspeed, maxspeed);
1172
1173         cd->current_speed = DIV_ROUND_CLOSEST(curspeed, 176);
1174         cd->max_speed = DIV_ROUND_CLOSEST(maxspeed, 176);
1175 }
1176
1177 #define IDE_CD_CAPABILITIES \
1178         (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1179          CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1180          CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1181          CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1182          CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1183
1184 static const struct cdrom_device_ops ide_cdrom_dops = {
1185         .open                   = ide_cdrom_open_real,
1186         .release                = ide_cdrom_release_real,
1187         .drive_status           = ide_cdrom_drive_status,
1188         .check_events           = ide_cdrom_check_events_real,
1189         .tray_move              = ide_cdrom_tray_move,
1190         .lock_door              = ide_cdrom_lock_door,
1191         .select_speed           = ide_cdrom_select_speed,
1192         .get_last_session       = ide_cdrom_get_last_session,
1193         .get_mcn                = ide_cdrom_get_mcn,
1194         .reset                  = ide_cdrom_reset,
1195         .audio_ioctl            = ide_cdrom_audio_ioctl,
1196         .capability             = IDE_CD_CAPABILITIES,
1197         .generic_packet         = ide_cdrom_packet,
1198 };
1199
1200 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1201 {
1202         struct cdrom_info *info = drive->driver_data;
1203         struct cdrom_device_info *devinfo = &info->devinfo;
1204
1205         ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots);
1206
1207         devinfo->ops = &ide_cdrom_dops;
1208         devinfo->speed = info->current_speed;
1209         devinfo->capacity = nslots;
1210         devinfo->handle = drive;
1211         strcpy(devinfo->name, drive->name);
1212
1213         if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1214                 devinfo->mask |= CDC_SELECT_SPEED;
1215
1216         devinfo->disk = info->disk;
1217         return register_cdrom(devinfo);
1218 }
1219
1220 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1221 {
1222         struct cdrom_info *cd = drive->driver_data;
1223         struct cdrom_device_info *cdi = &cd->devinfo;
1224         u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1225         mechtype_t mechtype;
1226         int nslots = 1;
1227
1228         ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx",
1229                                      drive->media, drive->atapi_flags);
1230
1231         cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1232                      CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1233                      CDC_MO_DRIVE | CDC_RAM);
1234
1235         if (drive->media == ide_optical) {
1236                 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1237                 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1238                                 drive->name);
1239                 return nslots;
1240         }
1241
1242         if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1243                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1244                 cdi->mask &= ~CDC_PLAY_AUDIO;
1245                 return nslots;
1246         }
1247
1248         /*
1249          * We have to cheat a little here. the packet will eventually be queued
1250          * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1251          * Since this device hasn't been registered with the Uniform layer yet,
1252          * it can't do this. Same goes for cdi->ops.
1253          */
1254         cdi->handle = drive;
1255         cdi->ops = &ide_cdrom_dops;
1256
1257         if (ide_cdrom_get_capabilities(drive, buf))
1258                 return 0;
1259
1260         if ((buf[8 + 6] & 0x01) == 0)
1261                 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1262         if (buf[8 + 6] & 0x08)
1263                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1264         if (buf[8 + 3] & 0x01)
1265                 cdi->mask &= ~CDC_CD_R;
1266         if (buf[8 + 3] & 0x02)
1267                 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1268         if (buf[8 + 2] & 0x38)
1269                 cdi->mask &= ~CDC_DVD;
1270         if (buf[8 + 3] & 0x20)
1271                 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1272         if (buf[8 + 3] & 0x10)
1273                 cdi->mask &= ~CDC_DVD_R;
1274         if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1275                 cdi->mask &= ~CDC_PLAY_AUDIO;
1276
1277         mechtype = buf[8 + 6] >> 5;
1278         if (mechtype == mechtype_caddy ||
1279             mechtype == mechtype_popup ||
1280             (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1281                 cdi->mask |= CDC_CLOSE_TRAY;
1282
1283         if (cdi->sanyo_slot > 0) {
1284                 cdi->mask &= ~CDC_SELECT_DISC;
1285                 nslots = 3;
1286         } else if (mechtype == mechtype_individual_changer ||
1287                    mechtype == mechtype_cartridge_changer) {
1288                 nslots = cdrom_number_of_slots(cdi);
1289                 if (nslots > 1)
1290                         cdi->mask &= ~CDC_SELECT_DISC;
1291         }
1292
1293         ide_cdrom_update_speed(drive, buf);
1294
1295         printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1296
1297         /* don't print speed if the drive reported 0 */
1298         if (cd->max_speed)
1299                 printk(KERN_CONT " %dX", cd->max_speed);
1300
1301         printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1302
1303         if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1304                 printk(KERN_CONT " DVD%s%s",
1305                                  (cdi->mask & CDC_DVD_R) ? "" : "-R",
1306                                  (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1307
1308         if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1309                 printk(KERN_CONT " CD%s%s",
1310                                  (cdi->mask & CDC_CD_R) ? "" : "-R",
1311                                  (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1312
1313         if ((cdi->mask & CDC_SELECT_DISC) == 0)
1314                 printk(KERN_CONT " changer w/%d slots", nslots);
1315         else
1316                 printk(KERN_CONT " drive");
1317
1318         printk(KERN_CONT ", %dkB Cache\n",
1319                          be16_to_cpup((__be16 *)&buf[8 + 12]));
1320
1321         return nslots;
1322 }
1323
1324 /* standard prep_rq_fn that builds 10 byte cmds */
1325 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1326 {
1327         int hard_sect = queue_logical_block_size(q);
1328         long block = (long)blk_rq_pos(rq) / (hard_sect >> 9);
1329         unsigned long blocks = blk_rq_sectors(rq) / (hard_sect >> 9);
1330         struct scsi_request *req = scsi_req(rq);
1331
1332         memset(req->cmd, 0, BLK_MAX_CDB);
1333
1334         if (rq_data_dir(rq) == READ)
1335                 req->cmd[0] = GPCMD_READ_10;
1336         else
1337                 req->cmd[0] = GPCMD_WRITE_10;
1338
1339         /*
1340          * fill in lba
1341          */
1342         req->cmd[2] = (block >> 24) & 0xff;
1343         req->cmd[3] = (block >> 16) & 0xff;
1344         req->cmd[4] = (block >>  8) & 0xff;
1345         req->cmd[5] = block & 0xff;
1346
1347         /*
1348          * and transfer length
1349          */
1350         req->cmd[7] = (blocks >> 8) & 0xff;
1351         req->cmd[8] = blocks & 0xff;
1352         req->cmd_len = 10;
1353         return BLKPREP_OK;
1354 }
1355
1356 /*
1357  * Most of the SCSI commands are supported directly by ATAPI devices.
1358  * This transform handles the few exceptions.
1359  */
1360 static int ide_cdrom_prep_pc(struct request *rq)
1361 {
1362         u8 *c = scsi_req(rq)->cmd;
1363
1364         /* transform 6-byte read/write commands to the 10-byte version */
1365         if (c[0] == READ_6 || c[0] == WRITE_6) {
1366                 c[8] = c[4];
1367                 c[5] = c[3];
1368                 c[4] = c[2];
1369                 c[3] = c[1] & 0x1f;
1370                 c[2] = 0;
1371                 c[1] &= 0xe0;
1372                 c[0] += (READ_10 - READ_6);
1373                 scsi_req(rq)->cmd_len = 10;
1374                 return BLKPREP_OK;
1375         }
1376
1377         /*
1378          * it's silly to pretend we understand 6-byte sense commands, just
1379          * reject with ILLEGAL_REQUEST and the caller should take the
1380          * appropriate action
1381          */
1382         if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1383                 scsi_req(rq)->result = ILLEGAL_REQUEST;
1384                 return BLKPREP_KILL;
1385         }
1386
1387         return BLKPREP_OK;
1388 }
1389
1390 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1391 {
1392         if (!blk_rq_is_passthrough(rq))
1393                 return ide_cdrom_prep_fs(q, rq);
1394         else if (blk_rq_is_scsi(rq))
1395                 return ide_cdrom_prep_pc(rq);
1396
1397         return 0;
1398 }
1399
1400 struct cd_list_entry {
1401         const char      *id_model;
1402         const char      *id_firmware;
1403         unsigned int    cd_flags;
1404 };
1405
1406 #ifdef CONFIG_IDE_PROC_FS
1407 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1408 {
1409         unsigned long capacity, sectors_per_frame;
1410
1411         if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1412                 return 0;
1413
1414         return capacity * sectors_per_frame;
1415 }
1416
1417 static int idecd_capacity_proc_show(struct seq_file *m, void *v)
1418 {
1419         ide_drive_t *drive = m->private;
1420
1421         seq_printf(m, "%llu\n", (long long)ide_cdrom_capacity(drive));
1422         return 0;
1423 }
1424
1425 static int idecd_capacity_proc_open(struct inode *inode, struct file *file)
1426 {
1427         return single_open(file, idecd_capacity_proc_show, PDE_DATA(inode));
1428 }
1429
1430 static const struct file_operations idecd_capacity_proc_fops = {
1431         .owner          = THIS_MODULE,
1432         .open           = idecd_capacity_proc_open,
1433         .read           = seq_read,
1434         .llseek         = seq_lseek,
1435         .release        = single_release,
1436 };
1437
1438 static ide_proc_entry_t idecd_proc[] = {
1439         { "capacity", S_IFREG|S_IRUGO, &idecd_capacity_proc_fops },
1440         {}
1441 };
1442
1443 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1444 {
1445         return idecd_proc;
1446 }
1447
1448 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1449 {
1450         return NULL;
1451 }
1452 #endif
1453
1454 static const struct cd_list_entry ide_cd_quirks_list[] = {
1455         /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1456         { "SAMSUNG CD-ROM SCR-3231", NULL,   IDE_AFLAG_NO_SPEED_SELECT       },
1457         /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1458         { "NEC CD-ROM DRIVE:260",    "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1459                                              IDE_AFLAG_PRE_ATAPI12,          },
1460         /* Vertos 300, some versions of this drive like to talk BCD. */
1461         { "V003S0DS",                NULL,   IDE_AFLAG_VERTOS_300_SSD,       },
1462         /* Vertos 600 ESD. */
1463         { "V006E0DS",                NULL,   IDE_AFLAG_VERTOS_600_ESD,       },
1464         /*
1465          * Sanyo 3 CD changer uses a non-standard command for CD changing
1466          * (by default standard ATAPI support for CD changers is used).
1467          */
1468         { "CD-ROM CDR-C3 G",         NULL,   IDE_AFLAG_SANYO_3CD             },
1469         { "CD-ROM CDR-C3G",          NULL,   IDE_AFLAG_SANYO_3CD             },
1470         { "CD-ROM CDR_C36",          NULL,   IDE_AFLAG_SANYO_3CD             },
1471         /* Stingray 8X CD-ROM. */
1472         { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1473         /*
1474          * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1475          * mode sense page capabilities size, but older drives break.
1476          */
1477         { "ATAPI CD ROM DRIVE 50X MAX", NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1478         { "WPI CDS-32X",                NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1479         /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1480         { "",                        "241N", IDE_AFLAG_LE_SPEED_FIELDS       },
1481         /*
1482          * Some drives used by Apple don't advertise audio play
1483          * but they do support reading TOC & audio datas.
1484          */
1485         { "MATSHITADVD-ROM SR-8187", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1486         { "MATSHITADVD-ROM SR-8186", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1487         { "MATSHITADVD-ROM SR-8176", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1488         { "MATSHITADVD-ROM SR-8174", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1489         { "Optiarc DVD RW AD-5200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1490         { "Optiarc DVD RW AD-7200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1491         { "Optiarc DVD RW AD-7543A", NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1492         { "TEAC CD-ROM CD-224E",     NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1493         { NULL, NULL, 0 }
1494 };
1495
1496 static unsigned int ide_cd_flags(u16 *id)
1497 {
1498         const struct cd_list_entry *cle = ide_cd_quirks_list;
1499
1500         while (cle->id_model) {
1501                 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1502                     (cle->id_firmware == NULL ||
1503                      strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1504                         return cle->cd_flags;
1505                 cle++;
1506         }
1507
1508         return 0;
1509 }
1510
1511 static int ide_cdrom_setup(ide_drive_t *drive)
1512 {
1513         struct cdrom_info *cd = drive->driver_data;
1514         struct cdrom_device_info *cdi = &cd->devinfo;
1515         struct request_queue *q = drive->queue;
1516         u16 *id = drive->id;
1517         char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1518         int nslots;
1519
1520         ide_debug_log(IDE_DBG_PROBE, "enter");
1521
1522         blk_queue_prep_rq(q, ide_cdrom_prep_fn);
1523         blk_queue_dma_alignment(q, 31);
1524         blk_queue_update_dma_pad(q, 15);
1525
1526         drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1527         drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1528
1529         if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1530             fw_rev[4] == '1' && fw_rev[6] <= '2')
1531                 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1532                                      IDE_AFLAG_TOCADDR_AS_BCD);
1533         else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1534                  fw_rev[4] == '1' && fw_rev[6] <= '2')
1535                 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1536         else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1537                 /* 3 => use CD in slot 0 */
1538                 cdi->sanyo_slot = 3;
1539
1540         nslots = ide_cdrom_probe_capabilities(drive);
1541
1542         blk_queue_logical_block_size(q, CD_FRAMESIZE);
1543
1544         if (ide_cdrom_register(drive, nslots)) {
1545                 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1546                                 " cdrom driver.\n", drive->name, __func__);
1547                 cd->devinfo.handle = NULL;
1548                 return 1;
1549         }
1550
1551         ide_proc_register_driver(drive, cd->driver);
1552         return 0;
1553 }
1554
1555 static void ide_cd_remove(ide_drive_t *drive)
1556 {
1557         struct cdrom_info *info = drive->driver_data;
1558
1559         ide_debug_log(IDE_DBG_FUNC, "enter");
1560
1561         ide_proc_unregister_driver(drive, info->driver);
1562         device_del(&info->dev);
1563         del_gendisk(info->disk);
1564
1565         mutex_lock(&idecd_ref_mutex);
1566         put_device(&info->dev);
1567         mutex_unlock(&idecd_ref_mutex);
1568 }
1569
1570 static void ide_cd_release(struct device *dev)
1571 {
1572         struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
1573         struct cdrom_device_info *devinfo = &info->devinfo;
1574         ide_drive_t *drive = info->drive;
1575         struct gendisk *g = info->disk;
1576
1577         ide_debug_log(IDE_DBG_FUNC, "enter");
1578
1579         kfree(info->toc);
1580         if (devinfo->handle == drive)
1581                 unregister_cdrom(devinfo);
1582         drive->driver_data = NULL;
1583         blk_queue_prep_rq(drive->queue, NULL);
1584         g->private_data = NULL;
1585         put_disk(g);
1586         kfree(info);
1587 }
1588
1589 static int ide_cd_probe(ide_drive_t *);
1590
1591 static struct ide_driver ide_cdrom_driver = {
1592         .gen_driver = {
1593                 .owner          = THIS_MODULE,
1594                 .name           = "ide-cdrom",
1595                 .bus            = &ide_bus_type,
1596         },
1597         .probe                  = ide_cd_probe,
1598         .remove                 = ide_cd_remove,
1599         .version                = IDECD_VERSION,
1600         .do_request             = ide_cd_do_request,
1601 #ifdef CONFIG_IDE_PROC_FS
1602         .proc_entries           = ide_cd_proc_entries,
1603         .proc_devsets           = ide_cd_proc_devsets,
1604 #endif
1605 };
1606
1607 static int idecd_open(struct block_device *bdev, fmode_t mode)
1608 {
1609         struct cdrom_info *info;
1610         int rc = -ENXIO;
1611
1612         mutex_lock(&ide_cd_mutex);
1613         info = ide_cd_get(bdev->bd_disk);
1614         if (!info)
1615                 goto out;
1616
1617         rc = cdrom_open(&info->devinfo, bdev, mode);
1618         if (rc < 0)
1619                 ide_cd_put(info);
1620 out:
1621         mutex_unlock(&ide_cd_mutex);
1622         return rc;
1623 }
1624
1625 static void idecd_release(struct gendisk *disk, fmode_t mode)
1626 {
1627         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1628
1629         mutex_lock(&ide_cd_mutex);
1630         cdrom_release(&info->devinfo, mode);
1631
1632         ide_cd_put(info);
1633         mutex_unlock(&ide_cd_mutex);
1634 }
1635
1636 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1637 {
1638         struct packet_command cgc;
1639         char buffer[16];
1640         int stat;
1641         char spindown;
1642
1643         if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1644                 return -EFAULT;
1645
1646         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1647
1648         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1649         if (stat)
1650                 return stat;
1651
1652         buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1653         return cdrom_mode_select(cdi, &cgc);
1654 }
1655
1656 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1657 {
1658         struct packet_command cgc;
1659         char buffer[16];
1660         int stat;
1661         char spindown;
1662
1663         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1664
1665         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1666         if (stat)
1667                 return stat;
1668
1669         spindown = buffer[11] & 0x0f;
1670         if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1671                 return -EFAULT;
1672         return 0;
1673 }
1674
1675 static int idecd_locked_ioctl(struct block_device *bdev, fmode_t mode,
1676                         unsigned int cmd, unsigned long arg)
1677 {
1678         struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1679         int err;
1680
1681         switch (cmd) {
1682         case CDROMSETSPINDOWN:
1683                 return idecd_set_spindown(&info->devinfo, arg);
1684         case CDROMGETSPINDOWN:
1685                 return idecd_get_spindown(&info->devinfo, arg);
1686         default:
1687                 break;
1688         }
1689
1690         err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1691         if (err == -EINVAL)
1692                 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
1693
1694         return err;
1695 }
1696
1697 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1698                              unsigned int cmd, unsigned long arg)
1699 {
1700         int ret;
1701
1702         mutex_lock(&ide_cd_mutex);
1703         ret = idecd_locked_ioctl(bdev, mode, cmd, arg);
1704         mutex_unlock(&ide_cd_mutex);
1705
1706         return ret;
1707 }
1708
1709
1710 static unsigned int idecd_check_events(struct gendisk *disk,
1711                                        unsigned int clearing)
1712 {
1713         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1714         return cdrom_check_events(&info->devinfo, clearing);
1715 }
1716
1717 static int idecd_revalidate_disk(struct gendisk *disk)
1718 {
1719         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1720         struct request_sense sense;
1721
1722         ide_cd_read_toc(info->drive, &sense);
1723
1724         return  0;
1725 }
1726
1727 static const struct block_device_operations idecd_ops = {
1728         .owner                  = THIS_MODULE,
1729         .open                   = idecd_open,
1730         .release                = idecd_release,
1731         .ioctl                  = idecd_ioctl,
1732         .check_events           = idecd_check_events,
1733         .revalidate_disk        = idecd_revalidate_disk
1734 };
1735
1736 /* module options */
1737 static unsigned long debug_mask;
1738 module_param(debug_mask, ulong, 0644);
1739
1740 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1741
1742 static int ide_cd_probe(ide_drive_t *drive)
1743 {
1744         struct cdrom_info *info;
1745         struct gendisk *g;
1746         struct request_sense sense;
1747
1748         ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x",
1749                                      drive->driver_req, drive->media);
1750
1751         if (!strstr("ide-cdrom", drive->driver_req))
1752                 goto failed;
1753
1754         if (drive->media != ide_cdrom && drive->media != ide_optical)
1755                 goto failed;
1756
1757         drive->debug_mask = debug_mask;
1758         drive->irq_handler = cdrom_newpc_intr;
1759
1760         info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
1761         if (info == NULL) {
1762                 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
1763                                 drive->name);
1764                 goto failed;
1765         }
1766
1767         g = alloc_disk(1 << PARTN_BITS);
1768         if (!g)
1769                 goto out_free_cd;
1770
1771         ide_init_disk(g, drive);
1772
1773         info->dev.parent = &drive->gendev;
1774         info->dev.release = ide_cd_release;
1775         dev_set_name(&info->dev, "%s", dev_name(&drive->gendev));
1776
1777         if (device_register(&info->dev))
1778                 goto out_free_disk;
1779
1780         info->drive = drive;
1781         info->driver = &ide_cdrom_driver;
1782         info->disk = g;
1783
1784         g->private_data = &info->driver;
1785
1786         drive->driver_data = info;
1787
1788         g->minors = 1;
1789         g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
1790         if (ide_cdrom_setup(drive)) {
1791                 put_device(&info->dev);
1792                 goto failed;
1793         }
1794
1795         ide_cd_read_toc(drive, &sense);
1796         g->fops = &idecd_ops;
1797         g->flags |= GENHD_FL_REMOVABLE | GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE;
1798         device_add_disk(&drive->gendev, g);
1799         return 0;
1800
1801 out_free_disk:
1802         put_disk(g);
1803 out_free_cd:
1804         kfree(info);
1805 failed:
1806         return -ENODEV;
1807 }
1808
1809 static void __exit ide_cdrom_exit(void)
1810 {
1811         driver_unregister(&ide_cdrom_driver.gen_driver);
1812 }
1813
1814 static int __init ide_cdrom_init(void)
1815 {
1816         printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
1817         return driver_register(&ide_cdrom_driver.gen_driver);
1818 }
1819
1820 MODULE_ALIAS("ide:*m-cdrom*");
1821 MODULE_ALIAS("ide-cd");
1822 module_init(ide_cdrom_init);
1823 module_exit(ide_cdrom_exit);
1824 MODULE_LICENSE("GPL");