git.oblomov.eu Git - linux-2.6/blob - 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/delay.h>
  32 #include <linux/timer.h>
  33 #include <linux/slab.h>
  34 #include <linux/interrupt.h>
  35 #include <linux/errno.h>
  36 #include <linux/cdrom.h>
  37 #include <linux/ide.h>
  38 #include <linux/completion.h>
  39 #include <linux/mutex.h>
  40 #include <linux/bcd.h>
  41
  42 /* For SCSI -> ATAPI command conversion */
  43 #include <scsi/scsi.h>
  44
  45 #include <linux/irq.h>
  46 #include <linux/io.h>
  47 #include <asm/byteorder.h>
  48 #include <linux/uaccess.h>
  49 #include <asm/unaligned.h>
  50
  51 #include "ide-cd.h"
  52
  53 static DEFINE_MUTEX(idecd_ref_mutex);
  54
  55 static void ide_cd_release(struct device *);
  56
  57 static struct cdrom_info *ide_cd_get(struct gendisk *disk)
  58 {
  59         struct cdrom_info *cd = NULL;
  60
  61         mutex_lock(&idecd_ref_mutex);
  62         cd = ide_drv_g(disk, cdrom_info);
  63         if (cd) {
  64                 if (ide_device_get(cd->drive))
  65                         cd = NULL;
  66                 else
  67                         get_device(&cd->dev);
  68
  69         }
  70         mutex_unlock(&idecd_ref_mutex);
  71         return cd;
  72 }
  73
  74 static void ide_cd_put(struct cdrom_info *cd)
  75 {
  76         ide_drive_t *drive = cd->drive;
  77
  78         mutex_lock(&idecd_ref_mutex);
  79         put_device(&cd->dev);
  80         ide_device_put(drive);
  81         mutex_unlock(&idecd_ref_mutex);
  82 }
  83
  84 /*
  85  * Generic packet command support and error handling routines.
  86  */
  87
  88 /* Mark that we've seen a media change and invalidate our internal buffers. */
  89 static void cdrom_saw_media_change(ide_drive_t *drive)
  90 {
  91         drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
  92         drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
  93 }
  94
  95 static int cdrom_log_sense(ide_drive_t *drive, struct request *rq,
  96                            struct request_sense *sense)
  97 {
  98         int log = 0;
  99
 100         ide_debug_log(IDE_DBG_SENSE, "sense_key: 0x%x", sense->sense_key);
 101
 102         if (!sense || !rq || (rq->cmd_flags & REQ_QUIET))
 103                 return 0;
 104
 105         switch (sense->sense_key) {
 106         case NO_SENSE:
 107         case RECOVERED_ERROR:
 108                 break;
 109         case NOT_READY:
 110                 /*
 111                  * don't care about tray state messages for e.g. capacity
 112                  * commands or in-progress or becoming ready
 113                  */
 114                 if (sense->asc == 0x3a || sense->asc == 0x04)
 115                         break;
 116                 log = 1;
 117                 break;
 118         case ILLEGAL_REQUEST:
 119                 /*
 120                  * don't log START_STOP unit with LoEj set, since we cannot
 121                  * reliably check if drive can auto-close
 122                  */
 123                 if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
 124                         break;
 125                 log = 1;
 126                 break;
 127         case UNIT_ATTENTION:
 128                 /*
 129                  * Make good and sure we've seen this potential media change.
 130                  * Some drives (i.e. Creative) fail to present the correct sense
 131                  * key in the error register.
 132                  */
 133                 cdrom_saw_media_change(drive);
 134                 break;
 135         default:
 136                 log = 1;
 137                 break;
 138         }
 139         return log;
 140 }
 141
 142 static void cdrom_analyze_sense_data(ide_drive_t *drive,
 143                               struct request *failed_command,
 144                               struct request_sense *sense)
 145 {
 146         unsigned long sector;
 147         unsigned long bio_sectors;
 148         struct cdrom_info *info = drive->driver_data;
 149
 150         ide_debug_log(IDE_DBG_SENSE, "error_code: 0x%x, sense_key: 0x%x",
 151                                      sense->error_code, sense->sense_key);
 152
 153         if (failed_command)
 154                 ide_debug_log(IDE_DBG_SENSE, "failed cmd: 0x%x",
 155                                              failed_command->cmd[0]);
 156
 157         if (!cdrom_log_sense(drive, failed_command, sense))
 158                 return;
 159
 160         /*
 161          * If a read toc is executed for a CD-R or CD-RW medium where the first
 162          * toc has not been recorded yet, it will fail with 05/24/00 (which is a
 163          * confusing error)
 164          */
 165         if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
 166                 if (sense->sense_key == 0x05 && sense->asc == 0x24)
 167                         return;
 168
 169         /* current error */
 170         if (sense->error_code == 0x70) {
 171                 switch (sense->sense_key) {
 172                 case MEDIUM_ERROR:
 173                 case VOLUME_OVERFLOW:
 174                 case ILLEGAL_REQUEST:
 175                         if (!sense->valid)
 176                                 break;
 177                         if (failed_command == NULL ||
 178                                         !blk_fs_request(failed_command))
 179                                 break;
 180                         sector = (sense->information[0] << 24) |
 181                                  (sense->information[1] << 16) |
 182                                  (sense->information[2] <<  8) |
 183                                  (sense->information[3]);
 184
 185                         if (drive->queue->hardsect_size == 2048)
 186                                 /* device sector size is 2K */
 187                                 sector <<= 2;
 188
 189                         bio_sectors = max(bio_sectors(failed_command->bio), 4U);
 190                         sector &= ~(bio_sectors - 1);
 191
 192                         /*
 193                          * The SCSI specification allows for the value
 194                          * returned by READ CAPACITY to be up to 75 2K
 195                          * sectors past the last readable block.
 196                          * Therefore, if we hit a medium error within the
 197                          * last 75 2K sectors, we decrease the saved size
 198                          * value.
 199                          */
 200                         if (sector < get_capacity(info->disk) &&
 201                             drive->probed_capacity - sector < 4 * 75)
 202                                 set_capacity(info->disk, sector);
 203                 }
 204         }
 205
 206         ide_cd_log_error(drive->name, failed_command, sense);
 207 }
 208
 209 static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense,
 210                                       struct request *failed_command)
 211 {
 212         struct cdrom_info *info         = drive->driver_data;
 213         struct request *rq              = &drive->request_sense_rq;
 214
 215         ide_debug_log(IDE_DBG_SENSE, "enter");
 216
 217         if (sense == NULL)
 218                 sense = &info->sense_data;
 219
 220         /* stuff the sense request in front of our current request */
 221         blk_rq_init(NULL, rq);
 222         rq->cmd_type = REQ_TYPE_ATA_PC;
 223         rq->rq_disk = info->disk;
 224
 225         rq->data = sense;
 226         rq->cmd[0] = GPCMD_REQUEST_SENSE;
 227         rq->cmd[4] = 18;
 228         rq->data_len = 18;
 229
 230         rq->cmd_type = REQ_TYPE_SENSE;
 231         rq->cmd_flags |= REQ_PREEMPT;
 232
 233         /* NOTE! Save the failed command in "rq->buffer" */
 234         rq->buffer = (void *) failed_command;
 235
 236         if (failed_command)
 237                 ide_debug_log(IDE_DBG_SENSE, "failed_cmd: 0x%x",
 238                                              failed_command->cmd[0]);
 239
 240         drive->hwif->rq = NULL;
 241
 242         elv_add_request(drive->queue, rq, ELEVATOR_INSERT_FRONT, 0);
 243 }
 244
 245 static void ide_cd_complete_failed_rq(ide_drive_t *drive, struct request *rq)
 246 {
 247         /*
 248          * For REQ_TYPE_SENSE, "rq->buffer" points to the original
 249          * failed request
 250          */
 251         struct request *failed = (struct request *)rq->buffer;
 252         struct cdrom_info *info = drive->driver_data;
 253         void *sense = &info->sense_data;
 254
 255         if (failed) {
 256                 if (failed->sense) {
 257                         sense = failed->sense;
 258                         failed->sense_len = rq->sense_len;
 259                 }
 260                 cdrom_analyze_sense_data(drive, failed, sense);
 261
 262                 if (ide_end_rq(drive, failed, -EIO, blk_rq_bytes(failed)))
 263                         BUG();
 264         } else
 265                 cdrom_analyze_sense_data(drive, NULL, sense);
 266 }
 267
 268
 269 /*
 270  * Allow the drive 5 seconds to recover; some devices will return NOT_READY
 271  * while flushing data from cache.
 272  *
 273  * returns: 0 failed (write timeout expired)
 274  *          1 success
 275  */
 276 static int ide_cd_breathe(ide_drive_t *drive, struct request *rq)
 277 {
 278
 279         struct cdrom_info *info = drive->driver_data;
 280
 281         if (!rq->errors)
 282                 info->write_timeout = jiffies + ATAPI_WAIT_WRITE_BUSY;
 283
 284         rq->errors = 1;
 285
 286         if (time_after(jiffies, info->write_timeout))
 287                 return 0;
 288         else {
 289                 struct request_queue *q = drive->queue;
 290                 unsigned long flags;
 291
 292                 /*
 293                  * take a breather relying on the unplug timer to kick us again
 294                  */
 295
 296                 spin_lock_irqsave(q->queue_lock, flags);
 297                 blk_plug_device(q);
 298                 spin_unlock_irqrestore(q->queue_lock, flags);
 299
 300                 return 1;
 301         }
 302 }
 303
 304 /**
 305  * Returns:
 306  * 0: if the request should be continued.
 307  * 1: if the request will be going through error recovery.
 308  * 2: if the request should be ended.
 309  */
 310 static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
 311 {
 312         ide_hwif_t *hwif = drive->hwif;
 313         struct request *rq = hwif->rq;
 314         int err, sense_key, do_end_request = 0;
 315
 316         /* get the IDE error register */
 317         err = ide_read_error(drive);
 318         sense_key = err >> 4;
 319
 320         ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, rq->cmd_type: 0x%x, err: 0x%x, "
 321                                   "stat 0x%x",
 322                                   rq->cmd[0], rq->cmd_type, err, stat);
 323
 324         if (blk_sense_request(rq)) {
 325                 /*
 326                  * We got an error trying to get sense info from the drive
 327                  * (probably while trying to recover from a former error).
 328                  * Just give up.
 329                  */
 330                 rq->cmd_flags |= REQ_FAILED;
 331                 return 2;
 332         }
 333
 334         /* if we have an error, pass CHECK_CONDITION as the SCSI status byte */
 335         if (blk_pc_request(rq) && !rq->errors)
 336                 rq->errors = SAM_STAT_CHECK_CONDITION;
 337
 338         if (blk_noretry_request(rq))
 339                 do_end_request = 1;
 340
 341         switch (sense_key) {
 342         case NOT_READY:
 343                 if (blk_fs_request(rq) && rq_data_dir(rq) == WRITE) {
 344                         if (ide_cd_breathe(drive, rq))
 345                                 return 1;
 346                 } else {
 347                         cdrom_saw_media_change(drive);
 348
 349                         if (blk_fs_request(rq) && !blk_rq_quiet(rq))
 350                                 printk(KERN_ERR PFX "%s: tray open\n",
 351                                         drive->name);
 352                 }
 353                 do_end_request = 1;
 354                 break;
 355         case UNIT_ATTENTION:
 356                 cdrom_saw_media_change(drive);
 357
 358                 if (blk_fs_request(rq) == 0)
 359                         return 0;
 360
 361                 /*
 362                  * Arrange to retry the request but be sure to give up if we've
 363                  * retried too many times.
 364                  */
 365                 if (++rq->errors > ERROR_MAX)
 366                         do_end_request = 1;
 367                 break;
 368         case ILLEGAL_REQUEST:
 369                 /*
 370                  * Don't print error message for this condition -- SFF8090i
 371                  * indicates that 5/24/00 is the correct response to a request
 372                  * to close the tray if the drive doesn't have that capability.
 373                  *
 374                  * cdrom_log_sense() knows this!
 375                  */
 376                 if (rq->cmd[0] == GPCMD_START_STOP_UNIT)
 377                         break;
 378                 /* fall-through */
 379         case DATA_PROTECT:
 380                 /*
 381                  * No point in retrying after an illegal request or data
 382                  * protect error.
 383                  */
 384                 if (!blk_rq_quiet(rq))
 385                         ide_dump_status(drive, "command error", stat);
 386                 do_end_request = 1;
 387                 break;
 388         case MEDIUM_ERROR:
 389                 /*
 390                  * No point in re-trying a zillion times on a bad sector.
 391                  * If we got here the error is not correctable.
 392                  */
 393                 if (!blk_rq_quiet(rq))
 394                         ide_dump_status(drive, "media error "
 395                                         "(bad sector)", stat);
 396                 do_end_request = 1;
 397                 break;
 398         case BLANK_CHECK:
 399                 /* disk appears blank? */
 400                 if (!blk_rq_quiet(rq))
 401                         ide_dump_status(drive, "media error (blank)",
 402                                         stat);
 403                 do_end_request = 1;
 404                 break;
 405         default:
 406                 if (blk_fs_request(rq) == 0)
 407                         break;
 408                 if (err & ~ATA_ABORTED) {
 409                         /* go to the default handler for other errors */
 410                         ide_error(drive, "cdrom_decode_status", stat);
 411                         return 1;
 412                 } else if (++rq->errors > ERROR_MAX)
 413                         /* we've racked up too many retries, abort */
 414                         do_end_request = 1;
 415         }
 416
 417         if (blk_fs_request(rq) == 0) {
 418                 rq->cmd_flags |= REQ_FAILED;
 419                 do_end_request = 1;
 420         }
 421
 422         /*
 423          * End a request through request sense analysis when we have sense data.
 424          * We need this in order to perform end of media processing.
 425          */
 426         if (do_end_request)
 427                 goto end_request;
 428
 429         /* if we got a CHECK_CONDITION status, queue a request sense command */
 430         if (stat & ATA_ERR)
 431                 cdrom_queue_request_sense(drive, NULL, NULL);
 432         return 1;
 433
 434 end_request:
 435         if (stat & ATA_ERR) {
 436                 struct request_queue *q = drive->queue;
 437                 unsigned long flags;
 438
 439                 spin_lock_irqsave(q->queue_lock, flags);
 440                 blkdev_dequeue_request(rq);
 441                 spin_unlock_irqrestore(q->queue_lock, flags);
 442
 443                 hwif->rq = NULL;
 444
 445                 cdrom_queue_request_sense(drive, rq->sense, rq);
 446                 return 1;
 447         } else
 448                 return 2;
 449 }
 450
 451 /*
 452  * Check the contents of the interrupt reason register from the cdrom
 453  * and attempt to recover if there are problems.  Returns  0 if everything's
 454  * ok; nonzero if the request has been terminated.
 455  */
 456 static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
 457                                 int len, int ireason, int rw)
 458 {
 459         ide_hwif_t *hwif = drive->hwif;
 460
 461         ide_debug_log(IDE_DBG_FUNC, "ireason: 0x%x, rw: 0x%x", ireason, rw);
 462
 463         /*
 464          * ireason == 0: the drive wants to receive data from us
 465          * ireason == 2: the drive is expecting to transfer data to us
 466          */
 467         if (ireason == (!rw << 1))
 468                 return 0;
 469         else if (ireason == (rw << 1)) {
 470
 471                 /* whoops... */
 472                 printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n",
 473                                 drive->name, __func__);
 474
 475                 ide_pad_transfer(drive, rw, len);
 476         } else  if (rw == 0 && ireason == 1) {
 477                 /*
 478                  * Some drives (ASUS) seem to tell us that status info is
 479                  * available.  Just get it and ignore.
 480                  */
 481                 (void)hwif->tp_ops->read_status(hwif);
 482                 return 0;
 483         } else {
 484                 /* drive wants a command packet, or invalid ireason... */
 485                 printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n",
 486                                 drive->name, __func__, ireason);
 487         }
 488
 489         if (rq->cmd_type == REQ_TYPE_ATA_PC)
 490                 rq->cmd_flags |= REQ_FAILED;
 491
 492         return -1;
 493 }
 494
 495 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct ide_cmd *cmd)
 496 {
 497         struct request *rq = cmd->rq;
 498
 499         ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]);
 500
 501         /*
 502          * Some of the trailing request sense fields are optional,
 503          * and some drives don't send them.  Sigh.
 504          */
 505         if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
 506             cmd->nleft > 0 && cmd->nleft <= 5) {
 507                 unsigned int ofs = cmd->nbytes - cmd->nleft;
 508
 509                 while (cmd->nleft > 0) {
 510                         *((u8 *)rq->data + ofs++) = 0;
 511                         cmd->nleft--;
 512                 }
 513         }
 514 }
 515
 516 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
 517                     int write, void *buffer, unsigned *bufflen,
 518                     struct request_sense *sense, int timeout,
 519                     unsigned int cmd_flags)
 520 {
 521         struct cdrom_info *info = drive->driver_data;
 522         struct request_sense local_sense;
 523         int retries = 10;
 524         unsigned int flags = 0;
 525
 526         if (!sense)
 527                 sense = &local_sense;
 528
 529         ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, "
 530                                   "cmd_flags: 0x%x",
 531                                   cmd[0], write, timeout, cmd_flags);
 532
 533         /* start of retry loop */
 534         do {
 535                 struct request *rq;
 536                 int error;
 537
 538                 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
 539
 540                 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
 541                 rq->cmd_type = REQ_TYPE_ATA_PC;
 542                 rq->sense = sense;
 543                 rq->cmd_flags |= cmd_flags;
 544                 rq->timeout = timeout;
 545                 if (buffer) {
 546                         rq->data = buffer;
 547                         rq->data_len = *bufflen;
 548                 }
 549
 550                 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
 551
 552                 if (buffer)
 553                         *bufflen = rq->data_len;
 554
 555                 flags = rq->cmd_flags;
 556                 blk_put_request(rq);
 557
 558                 /*
 559                  * FIXME: we should probably abort/retry or something in case of
 560                  * failure.
 561                  */
 562                 if (flags & REQ_FAILED) {
 563                         /*
 564                          * The request failed.  Retry if it was due to a unit
 565                          * attention status (usually means media was changed).
 566                          */
 567                         struct request_sense *reqbuf = sense;
 568
 569                         if (reqbuf->sense_key == UNIT_ATTENTION)
 570                                 cdrom_saw_media_change(drive);
 571                         else if (reqbuf->sense_key == NOT_READY &&
 572                                  reqbuf->asc == 4 && reqbuf->ascq != 4) {
 573                                 /*
 574                                  * The drive is in the process of loading
 575                                  * a disk.  Retry, but wait a little to give
 576                                  * the drive time to complete the load.
 577                                  */
 578                                 ssleep(2);
 579                         } else {
 580                                 /* otherwise, don't retry */
 581                                 retries = 0;
 582                         }
 583                         --retries;
 584                 }
 585
 586                 /* end of retry loop */
 587         } while ((flags & REQ_FAILED) && retries >= 0);
 588
 589         /* return an error if the command failed */
 590         return (flags & REQ_FAILED) ? -EIO : 0;
 591 }
 592
 593 static void ide_cd_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
 594 {
 595         unsigned int nr_bytes = cmd->nbytes - cmd->nleft;
 596
 597         if (cmd->tf_flags & IDE_TFLAG_WRITE)
 598                 nr_bytes -= cmd->last_xfer_len;
 599
 600         if (nr_bytes > 0)
 601                 ide_complete_rq(drive, 0, nr_bytes);
 602 }
 603
 604 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 605 {
 606         ide_hwif_t *hwif = drive->hwif;
 607         struct ide_cmd *cmd = &hwif->cmd;
 608         struct request *rq = hwif->rq;
 609         ide_expiry_t *expiry = NULL;
 610         int dma_error = 0, dma, thislen, uptodate = 0;
 611         int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc = 0, nsectors;
 612         int sense = blk_sense_request(rq);
 613         unsigned int timeout;
 614         u16 len;
 615         u8 ireason, stat;
 616
 617         ide_debug_log(IDE_DBG_PC, "cmd: 0x%x, write: 0x%x", rq->cmd[0], write);
 618
 619         /* check for errors */
 620         dma = drive->dma;
 621         if (dma) {
 622                 drive->dma = 0;
 623                 drive->waiting_for_dma = 0;
 624                 dma_error = hwif->dma_ops->dma_end(drive);
 625                 ide_dma_unmap_sg(drive, cmd);
 626                 if (dma_error) {
 627                         printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
 628                                         write ? "write" : "read");
 629                         ide_dma_off(drive);
 630                 }
 631         }
 632
 633         /* check status */
 634         stat = hwif->tp_ops->read_status(hwif);
 635
 636         if (!OK_STAT(stat, 0, BAD_R_STAT)) {
 637                 rc = cdrom_decode_status(drive, stat);
 638                 if (rc) {
 639                         if (rc == 2)
 640                                 goto out_end;
 641                         return ide_stopped;
 642                 }
 643         }
 644
 645         /* using dma, transfer is complete now */
 646         if (dma) {
 647                 if (dma_error)
 648                         return ide_error(drive, "dma error", stat);
 649                 uptodate = 1;
 650                 goto out_end;
 651         }
 652
 653         ide_read_bcount_and_ireason(drive, &len, &ireason);
 654
 655         thislen = blk_fs_request(rq) ? len : cmd->nleft;
 656         if (thislen > len)
 657                 thislen = len;
 658
 659         ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d",
 660                                   stat, thislen);
 661
 662         /* If DRQ is clear, the command has completed. */
 663         if ((stat & ATA_DRQ) == 0) {
 664                 if (blk_fs_request(rq)) {
 665                         /*
 666                          * If we're not done reading/writing, complain.
 667                          * Otherwise, complete the command normally.
 668                          */
 669                         uptodate = 1;
 670                         if (cmd->nleft > 0) {
 671                                 printk(KERN_ERR PFX "%s: %s: data underrun "
 672                                         "(%u bytes)\n", drive->name, __func__,
 673                                         cmd->nleft);
 674                                 if (!write)
 675                                         rq->cmd_flags |= REQ_FAILED;
 676                                 uptodate = 0;
 677                         }
 678                 } else if (!blk_pc_request(rq)) {
 679                         ide_cd_request_sense_fixup(drive, cmd);
 680                         /* complain if we still have data left to transfer */
 681                         uptodate = cmd->nleft ? 0 : 1;
 682                         if (uptodate == 0)
 683                                 rq->cmd_flags |= REQ_FAILED;
 684                 }
 685                 goto out_end;
 686         }
 687
 688         /* check which way to transfer data */
 689         rc = ide_cd_check_ireason(drive, rq, len, ireason, write);
 690         if (rc)
 691                 goto out_end;
 692
 693         cmd->last_xfer_len = 0;
 694
 695         ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, "
 696                                   "ireason: 0x%x",
 697                                   rq->cmd_type, ireason);
 698
 699         /* transfer data */
 700         while (thislen > 0) {
 701                 int blen = min_t(int, thislen, cmd->nleft);
 702
 703                 if (cmd->nleft == 0)
 704                         break;
 705
 706                 ide_pio_bytes(drive, cmd, write, blen);
 707                 cmd->last_xfer_len += blen;
 708
 709                 thislen -= blen;
 710                 len -= blen;
 711
 712                 if (sense && write == 0)
 713                         rq->sense_len += blen;
 714         }
 715
 716         /* pad, if necessary */
 717         if (len > 0) {
 718                 if (blk_fs_request(rq) == 0 || write == 0)
 719                         ide_pad_transfer(drive, write, len);
 720                 else {
 721                         printk(KERN_ERR PFX "%s: confused, missing data\n",
 722                                 drive->name);
 723                         blk_dump_rq_flags(rq, "cdrom_newpc_intr");
 724                 }
 725         }
 726
 727         if (blk_pc_request(rq)) {
 728                 timeout = rq->timeout;
 729         } else {
 730                 timeout = ATAPI_WAIT_PC;
 731                 if (!blk_fs_request(rq))
 732                         expiry = ide_cd_expiry;
 733         }
 734
 735         hwif->expiry = expiry;
 736         ide_set_handler(drive, cdrom_newpc_intr, timeout);
 737         return ide_started;
 738
 739 out_end:
 740         if (blk_pc_request(rq) && rc == 0) {
 741                 unsigned int dlen = rq->data_len;
 742
 743                 rq->data_len = 0;
 744
 745                 if (blk_end_request(rq, 0, dlen))
 746                         BUG();
 747
 748                 hwif->rq = NULL;
 749         } else {
 750                 if (sense && uptodate)
 751                         ide_cd_complete_failed_rq(drive, rq);
 752
 753                 if (blk_fs_request(rq)) {
 754                         if (cmd->nleft == 0)
 755                                 uptodate = 1;
 756                 } else {
 757                         if (uptodate <= 0 && rq->errors == 0)
 758                                 rq->errors = -EIO;
 759                 }
 760
 761                 if (uptodate == 0)
 762                         ide_cd_error_cmd(drive, cmd);
 763
 764                 /* make sure it's fully ended */
 765                 if (blk_pc_request(rq))
 766                         nsectors = (rq->data_len + 511) >> 9;
 767                 else
 768                         nsectors = rq->hard_nr_sectors;
 769
 770                 if (nsectors == 0)
 771                         nsectors = 1;
 772
 773                 if (blk_fs_request(rq) == 0) {
 774                         rq->data_len -= (cmd->nbytes - cmd->nleft);
 775                         if (uptodate == 0 && (cmd->tf_flags & IDE_TFLAG_WRITE))
 776                                 rq->data_len += cmd->last_xfer_len;
 777                 }
 778
 779                 ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
 780
 781                 if (sense && rc == 2)
 782                         ide_error(drive, "request sense failure", stat);
 783         }
 784         return ide_stopped;
 785 }
 786
 787 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
 788 {
 789         struct cdrom_info *cd = drive->driver_data;
 790         struct request_queue *q = drive->queue;
 791         int write = rq_data_dir(rq) == WRITE;
 792         unsigned short sectors_per_frame =
 793                 queue_hardsect_size(q) >> SECTOR_BITS;
 794
 795         ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, rq->cmd_flags: 0x%x, "
 796                                   "secs_per_frame: %u",
 797                                   rq->cmd[0], rq->cmd_flags, sectors_per_frame);
 798
 799         if (write) {
 800                 /* disk has become write protected */
 801                 if (get_disk_ro(cd->disk))
 802                         return ide_stopped;
 803         } else {
 804                 /*
 805                  * We may be retrying this request after an error.  Fix up any
 806                  * weirdness which might be present in the request packet.
 807                  */
 808                 q->prep_rq_fn(q, rq);
 809         }
 810
 811         /* fs requests *must* be hardware frame aligned */
 812         if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
 813             (rq->sector & (sectors_per_frame - 1)))
 814                 return ide_stopped;
 815
 816         /* use DMA, if possible */
 817         drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
 818
 819         if (write)
 820                 cd->devinfo.media_written = 1;
 821
 822         rq->timeout = ATAPI_WAIT_PC;
 823
 824         return ide_started;
 825 }
 826
 827 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
 828 {
 829
 830         ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
 831                                   rq->cmd[0], rq->cmd_type);
 832
 833         if (blk_pc_request(rq))
 834                 rq->cmd_flags |= REQ_QUIET;
 835         else
 836                 rq->cmd_flags &= ~REQ_FAILED;
 837
 838         drive->dma = 0;
 839
 840         /* sg request */
 841         if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) {
 842                 struct request_queue *q = drive->queue;
 843                 unsigned int alignment;
 844                 char *buf;
 845
 846                 if (rq->bio)
 847                         buf = bio_data(rq->bio);
 848                 else
 849                         buf = rq->data;
 850
 851                 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
 852
 853                 /*
 854                  * check if dma is safe
 855                  *
 856                  * NOTE! The "len" and "addr" checks should possibly have
 857                  * separate masks.
 858                  */
 859                 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
 860                 if ((unsigned long)buf & alignment
 861                     || rq->data_len & q->dma_pad_mask
 862                     || object_is_on_stack(buf))
 863                         drive->dma = 0;
 864         }
 865 }
 866
 867 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
 868                                         sector_t block)
 869 {
 870         struct ide_cmd cmd;
 871         int uptodate = 0, nsectors;
 872
 873         ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
 874                                   rq->cmd[0], (unsigned long long)block);
 875
 876         if (drive->debug_mask & IDE_DBG_RQ)
 877                 blk_dump_rq_flags(rq, "ide_cd_do_request");
 878
 879         if (blk_fs_request(rq)) {
 880                 if (cdrom_start_rw(drive, rq) == ide_stopped)
 881                         goto out_end;
 882         } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
 883                    rq->cmd_type == REQ_TYPE_ATA_PC) {
 884                 if (!rq->timeout)
 885                         rq->timeout = ATAPI_WAIT_PC;
 886
 887                 cdrom_do_block_pc(drive, rq);
 888         } else if (blk_special_request(rq)) {
 889                 /* right now this can only be a reset... */
 890                 uptodate = 1;
 891                 goto out_end;
 892         } else {
 893                 blk_dump_rq_flags(rq, DRV_NAME " bad flags");
 894                 if (rq->errors == 0)
 895                         rq->errors = -EIO;
 896                 goto out_end;
 897         }
 898
 899         memset(&cmd, 0, sizeof(cmd));
 900
 901         if (rq_data_dir(rq))
 902                 cmd.tf_flags |= IDE_TFLAG_WRITE;
 903
 904         cmd.rq = rq;
 905
 906         if (blk_fs_request(rq) || rq->data_len) {
 907                 ide_init_sg_cmd(&cmd, blk_fs_request(rq) ? (rq->nr_sectors << 9)
 908                                                          : rq->data_len);
 909                 ide_map_sg(drive, &cmd);
 910         }
 911
 912         return ide_issue_pc(drive, &cmd);
 913 out_end:
 914         nsectors = rq->hard_nr_sectors;
 915
 916         if (nsectors == 0)
 917                 nsectors = 1;
 918
 919         ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
 920
 921         return ide_stopped;
 922 }
 923
 924 /*
 925  * Ioctl handling.
 926  *
 927  * Routines which queue packet commands take as a final argument a pointer to a
 928  * request_sense struct. If execution of the command results in an error with a
 929  * CHECK CONDITION status, this structure will be filled with the results of the
 930  * subsequent request sense command. The pointer can also be NULL, in which case
 931  * no sense information is returned.
 932  */
 933 static void msf_from_bcd(struct atapi_msf *msf)
 934 {
 935         msf->minute = bcd2bin(msf->minute);
 936         msf->second = bcd2bin(msf->second);
 937         msf->frame  = bcd2bin(msf->frame);
 938 }
 939
 940 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
 941 {
 942         struct cdrom_info *info = drive->driver_data;
 943         struct cdrom_device_info *cdi = &info->devinfo;
 944         unsigned char cmd[BLK_MAX_CDB];
 945
 946         ide_debug_log(IDE_DBG_FUNC, "enter");
 947
 948         memset(cmd, 0, BLK_MAX_CDB);
 949         cmd[0] = GPCMD_TEST_UNIT_READY;
 950
 951         /*
 952          * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
 953          * instead of supporting the LOAD_UNLOAD opcode.
 954          */
 955         cmd[7] = cdi->sanyo_slot % 3;
 956
 957         return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
 958 }
 959
 960 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
 961                                unsigned long *sectors_per_frame,
 962                                struct request_sense *sense)
 963 {
 964         struct {
 965                 __be32 lba;
 966                 __be32 blocklen;
 967         } capbuf;
 968
 969         int stat;
 970         unsigned char cmd[BLK_MAX_CDB];
 971         unsigned len = sizeof(capbuf);
 972         u32 blocklen;
 973
 974         ide_debug_log(IDE_DBG_FUNC, "enter");
 975
 976         memset(cmd, 0, BLK_MAX_CDB);
 977         cmd[0] = GPCMD_READ_CDVD_CAPACITY;
 978
 979         stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
 980                                REQ_QUIET);
 981         if (stat)
 982                 return stat;
 983
 984         /*
 985          * Sanity check the given block size
 986          */
 987         blocklen = be32_to_cpu(capbuf.blocklen);
 988         switch (blocklen) {
 989         case 512:
 990         case 1024:
 991         case 2048:
 992         case 4096:
 993                 break;
 994         default:
 995                 printk(KERN_ERR PFX "%s: weird block size %u\n",
 996                                 drive->name, blocklen);
 997                 printk(KERN_ERR PFX "%s: default to 2kb block size\n",
 998                                 drive->name);
 999                 blocklen = 2048;
1000                 break;
1001         }
1002
1003         *capacity = 1 + be32_to_cpu(capbuf.lba);
1004         *sectors_per_frame = blocklen >> SECTOR_BITS;
1005
1006         ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu",
1007                                      *capacity, *sectors_per_frame);
1008
1009         return 0;
1010 }
1011
1012 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1013                                 int format, char *buf, int buflen,
1014                                 struct request_sense *sense)
1015 {
1016         unsigned char cmd[BLK_MAX_CDB];
1017
1018         ide_debug_log(IDE_DBG_FUNC, "enter");
1019
1020         memset(cmd, 0, BLK_MAX_CDB);
1021
1022         cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1023         cmd[6] = trackno;
1024         cmd[7] = (buflen >> 8);
1025         cmd[8] = (buflen & 0xff);
1026         cmd[9] = (format << 6);
1027
1028         if (msf_flag)
1029                 cmd[1] = 2;
1030
1031         return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
1032 }
1033
1034 /* Try to read the entire TOC for the disk into our internal buffer. */
1035 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1036 {
1037         int stat, ntracks, i;
1038         struct cdrom_info *info = drive->driver_data;
1039         struct cdrom_device_info *cdi = &info->devinfo;
1040         struct atapi_toc *toc = info->toc;
1041         struct {
1042                 struct atapi_toc_header hdr;
1043                 struct atapi_toc_entry  ent;
1044         } ms_tmp;
1045         long last_written;
1046         unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1047
1048         ide_debug_log(IDE_DBG_FUNC, "enter");
1049
1050         if (toc == NULL) {
1051                 /* try to allocate space */
1052                 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1053                 if (toc == NULL) {
1054                         printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
1055                                         drive->name);
1056                         return -ENOMEM;
1057                 }
1058                 info->toc = toc;
1059         }
1060
1061         /*
1062          * Check to see if the existing data is still valid. If it is,
1063          * just return.
1064          */
1065         (void) cdrom_check_status(drive, sense);
1066
1067         if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
1068                 return 0;
1069
1070         /* try to get the total cdrom capacity and sector size */
1071         stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1072                                    sense);
1073         if (stat)
1074                 toc->capacity = 0x1fffff;
1075
1076         set_capacity(info->disk, toc->capacity * sectors_per_frame);
1077         /* save a private copy of the TOC capacity for error handling */
1078         drive->probed_capacity = toc->capacity * sectors_per_frame;
1079
1080         blk_queue_hardsect_size(drive->queue,
1081                                 sectors_per_frame << SECTOR_BITS);
1082
1083         /* first read just the header, so we know how long the TOC is */
1084         stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1085                                     sizeof(struct atapi_toc_header), sense);
1086         if (stat)
1087                 return stat;
1088
1089         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1090                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1091                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1092         }
1093
1094         ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1095         if (ntracks <= 0)
1096                 return -EIO;
1097         if (ntracks > MAX_TRACKS)
1098                 ntracks = MAX_TRACKS;
1099
1100         /* now read the whole schmeer */
1101         stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1102                                   (char *)&toc->hdr,
1103                                    sizeof(struct atapi_toc_header) +
1104                                    (ntracks + 1) *
1105                                    sizeof(struct atapi_toc_entry), sense);
1106
1107         if (stat && toc->hdr.first_track > 1) {
1108                 /*
1109                  * Cds with CDI tracks only don't have any TOC entries, despite
1110                  * of this the returned values are
1111                  * first_track == last_track = number of CDI tracks + 1,
1112                  * so that this case is indistinguishable from the same layout
1113                  * plus an additional audio track. If we get an error for the
1114                  * regular case, we assume a CDI without additional audio
1115                  * tracks. In this case the readable TOC is empty (CDI tracks
1116                  * are not included) and only holds the Leadout entry.
1117                  *
1118                  * Heiko Eißfeldt.
1119                  */
1120                 ntracks = 0;
1121                 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1122                                            (char *)&toc->hdr,
1123                                            sizeof(struct atapi_toc_header) +
1124                                            (ntracks + 1) *
1125                                            sizeof(struct atapi_toc_entry),
1126                                            sense);
1127                 if (stat)
1128                         return stat;
1129
1130                 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1131                         toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1132                         toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1133                 } else {
1134                         toc->hdr.first_track = CDROM_LEADOUT;
1135                         toc->hdr.last_track = CDROM_LEADOUT;
1136                 }
1137         }
1138
1139         if (stat)
1140                 return stat;
1141
1142         toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1143
1144         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1145                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1146                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1147         }
1148
1149         for (i = 0; i <= ntracks; i++) {
1150                 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1151                         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1152                                 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1153                         msf_from_bcd(&toc->ent[i].addr.msf);
1154                 }
1155                 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1156                                                   toc->ent[i].addr.msf.second,
1157                                                   toc->ent[i].addr.msf.frame);
1158         }
1159
1160         if (toc->hdr.first_track != CDROM_LEADOUT) {
1161                 /* read the multisession information */
1162                 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1163                                            sizeof(ms_tmp), sense);
1164                 if (stat)
1165                         return stat;
1166
1167                 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1168         } else {
1169                 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1170                 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1171                 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1172         }
1173
1174         if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1175                 /* re-read multisession information using MSF format */
1176                 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1177                                            sizeof(ms_tmp), sense);
1178                 if (stat)
1179                         return stat;
1180
1181                 msf_from_bcd(&ms_tmp.ent.addr.msf);
1182                 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1183                                                    ms_tmp.ent.addr.msf.second,
1184                                                    ms_tmp.ent.addr.msf.frame);
1185         }
1186
1187         toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1188
1189         /* now try to get the total cdrom capacity */
1190         stat = cdrom_get_last_written(cdi, &last_written);
1191         if (!stat && (last_written > toc->capacity)) {
1192                 toc->capacity = last_written;
1193                 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1194                 drive->probed_capacity = toc->capacity * sectors_per_frame;
1195         }
1196
1197         /* Remember that we've read this stuff. */
1198         drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1199
1200         return 0;
1201 }
1202
1203 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1204 {
1205         struct cdrom_info *info = drive->driver_data;
1206         struct cdrom_device_info *cdi = &info->devinfo;
1207         struct packet_command cgc;
1208         int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1209
1210         ide_debug_log(IDE_DBG_FUNC, "enter");
1211
1212         if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1213                 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1214
1215         init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1216         do {
1217                 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1218                 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1219                 if (!stat)
1220                         break;
1221         } while (--attempts);
1222         return stat;
1223 }
1224
1225 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1226 {
1227         struct cdrom_info *cd = drive->driver_data;
1228         u16 curspeed, maxspeed;
1229
1230         ide_debug_log(IDE_DBG_FUNC, "enter");
1231
1232         if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1233                 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1234                 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1235         } else {
1236                 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1237                 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1238         }
1239
1240         ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u",
1241                                      curspeed, maxspeed);
1242
1243         cd->current_speed = (curspeed + (176/2)) / 176;
1244         cd->max_speed = (maxspeed + (176/2)) / 176;
1245 }
1246
1247 #define IDE_CD_CAPABILITIES \
1248         (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1249          CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1250          CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1251          CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1252          CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1253
1254 static struct cdrom_device_ops ide_cdrom_dops = {
1255         .open                   = ide_cdrom_open_real,
1256         .release                = ide_cdrom_release_real,
1257         .drive_status           = ide_cdrom_drive_status,
1258         .media_changed          = ide_cdrom_check_media_change_real,
1259         .tray_move              = ide_cdrom_tray_move,
1260         .lock_door              = ide_cdrom_lock_door,
1261         .select_speed           = ide_cdrom_select_speed,
1262         .get_last_session       = ide_cdrom_get_last_session,
1263         .get_mcn                = ide_cdrom_get_mcn,
1264         .reset                  = ide_cdrom_reset,
1265         .audio_ioctl            = ide_cdrom_audio_ioctl,
1266         .capability             = IDE_CD_CAPABILITIES,
1267         .generic_packet         = ide_cdrom_packet,
1268 };
1269
1270 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1271 {
1272         struct cdrom_info *info = drive->driver_data;
1273         struct cdrom_device_info *devinfo = &info->devinfo;
1274
1275         ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots);
1276
1277         devinfo->ops = &ide_cdrom_dops;
1278         devinfo->speed = info->current_speed;
1279         devinfo->capacity = nslots;
1280         devinfo->handle = drive;
1281         strcpy(devinfo->name, drive->name);
1282
1283         if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1284                 devinfo->mask |= CDC_SELECT_SPEED;
1285
1286         devinfo->disk = info->disk;
1287         return register_cdrom(devinfo);
1288 }
1289
1290 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1291 {
1292         struct cdrom_info *cd = drive->driver_data;
1293         struct cdrom_device_info *cdi = &cd->devinfo;
1294         u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1295         mechtype_t mechtype;
1296         int nslots = 1;
1297
1298         ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx",
1299                                      drive->media, drive->atapi_flags);
1300
1301         cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1302                      CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1303                      CDC_MO_DRIVE | CDC_RAM);
1304
1305         if (drive->media == ide_optical) {
1306                 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1307                 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1308                                 drive->name);
1309                 return nslots;
1310         }
1311
1312         if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1313                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1314                 cdi->mask &= ~CDC_PLAY_AUDIO;
1315                 return nslots;
1316         }
1317
1318         /*
1319          * We have to cheat a little here. the packet will eventually be queued
1320          * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1321          * Since this device hasn't been registered with the Uniform layer yet,
1322          * it can't do this. Same goes for cdi->ops.
1323          */
1324         cdi->handle = drive;
1325         cdi->ops = &ide_cdrom_dops;
1326
1327         if (ide_cdrom_get_capabilities(drive, buf))
1328                 return 0;
1329
1330         if ((buf[8 + 6] & 0x01) == 0)
1331                 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1332         if (buf[8 + 6] & 0x08)
1333                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1334         if (buf[8 + 3] & 0x01)
1335                 cdi->mask &= ~CDC_CD_R;
1336         if (buf[8 + 3] & 0x02)
1337                 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1338         if (buf[8 + 2] & 0x38)
1339                 cdi->mask &= ~CDC_DVD;
1340         if (buf[8 + 3] & 0x20)
1341                 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1342         if (buf[8 + 3] & 0x10)
1343                 cdi->mask &= ~CDC_DVD_R;
1344         if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1345                 cdi->mask &= ~CDC_PLAY_AUDIO;
1346
1347         mechtype = buf[8 + 6] >> 5;
1348         if (mechtype == mechtype_caddy ||
1349             mechtype == mechtype_popup ||
1350             (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1351                 cdi->mask |= CDC_CLOSE_TRAY;
1352
1353         if (cdi->sanyo_slot > 0) {
1354                 cdi->mask &= ~CDC_SELECT_DISC;
1355                 nslots = 3;
1356         } else if (mechtype == mechtype_individual_changer ||
1357                    mechtype == mechtype_cartridge_changer) {
1358                 nslots = cdrom_number_of_slots(cdi);
1359                 if (nslots > 1)
1360                         cdi->mask &= ~CDC_SELECT_DISC;
1361         }
1362
1363         ide_cdrom_update_speed(drive, buf);
1364
1365         printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1366
1367         /* don't print speed if the drive reported 0 */
1368         if (cd->max_speed)
1369                 printk(KERN_CONT " %dX", cd->max_speed);
1370
1371         printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1372
1373         if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1374                 printk(KERN_CONT " DVD%s%s",
1375                                  (cdi->mask & CDC_DVD_R) ? "" : "-R",
1376                                  (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1377
1378         if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1379                 printk(KERN_CONT " CD%s%s",
1380                                  (cdi->mask & CDC_CD_R) ? "" : "-R",
1381                                  (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1382
1383         if ((cdi->mask & CDC_SELECT_DISC) == 0)
1384                 printk(KERN_CONT " changer w/%d slots", nslots);
1385         else
1386                 printk(KERN_CONT " drive");
1387
1388         printk(KERN_CONT ", %dkB Cache\n",
1389                          be16_to_cpup((__be16 *)&buf[8 + 12]));
1390
1391         return nslots;
1392 }
1393
1394 /* standard prep_rq_fn that builds 10 byte cmds */
1395 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1396 {
1397         int hard_sect = queue_hardsect_size(q);
1398         long block = (long)rq->hard_sector / (hard_sect >> 9);
1399         unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1400
1401         memset(rq->cmd, 0, BLK_MAX_CDB);
1402
1403         if (rq_data_dir(rq) == READ)
1404                 rq->cmd[0] = GPCMD_READ_10;
1405         else
1406                 rq->cmd[0] = GPCMD_WRITE_10;
1407
1408         /*
1409          * fill in lba
1410          */
1411         rq->cmd[2] = (block >> 24) & 0xff;
1412         rq->cmd[3] = (block >> 16) & 0xff;
1413         rq->cmd[4] = (block >>  8) & 0xff;
1414         rq->cmd[5] = block & 0xff;
1415
1416         /*
1417          * and transfer length
1418          */
1419         rq->cmd[7] = (blocks >> 8) & 0xff;
1420         rq->cmd[8] = blocks & 0xff;
1421         rq->cmd_len = 10;
1422         return BLKPREP_OK;
1423 }
1424
1425 /*
1426  * Most of the SCSI commands are supported directly by ATAPI devices.
1427  * This transform handles the few exceptions.
1428  */
1429 static int ide_cdrom_prep_pc(struct request *rq)
1430 {
1431         u8 *c = rq->cmd;
1432
1433         /* transform 6-byte read/write commands to the 10-byte version */
1434         if (c[0] == READ_6 || c[0] == WRITE_6) {
1435                 c[8] = c[4];
1436                 c[5] = c[3];
1437                 c[4] = c[2];
1438                 c[3] = c[1] & 0x1f;
1439                 c[2] = 0;
1440                 c[1] &= 0xe0;
1441                 c[0] += (READ_10 - READ_6);
1442                 rq->cmd_len = 10;
1443                 return BLKPREP_OK;
1444         }
1445
1446         /*
1447          * it's silly to pretend we understand 6-byte sense commands, just
1448          * reject with ILLEGAL_REQUEST and the caller should take the
1449          * appropriate action
1450          */
1451         if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1452                 rq->errors = ILLEGAL_REQUEST;
1453                 return BLKPREP_KILL;
1454         }
1455
1456         return BLKPREP_OK;
1457 }
1458
1459 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1460 {
1461         if (blk_fs_request(rq))
1462                 return ide_cdrom_prep_fs(q, rq);
1463         else if (blk_pc_request(rq))
1464                 return ide_cdrom_prep_pc(rq);
1465
1466         return 0;
1467 }
1468
1469 struct cd_list_entry {
1470         const char      *id_model;
1471         const char      *id_firmware;
1472         unsigned int    cd_flags;
1473 };
1474
1475 #ifdef CONFIG_IDE_PROC_FS
1476 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1477 {
1478         unsigned long capacity, sectors_per_frame;
1479
1480         if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1481                 return 0;
1482
1483         return capacity * sectors_per_frame;
1484 }
1485
1486 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1487                                         int count, int *eof, void *data)
1488 {
1489         ide_drive_t *drive = data;
1490         int len;
1491
1492         len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1493         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1494 }
1495
1496 static ide_proc_entry_t idecd_proc[] = {
1497         { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1498         { NULL, 0, NULL, NULL }
1499 };
1500
1501 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1502 {
1503         return idecd_proc;
1504 }
1505
1506 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1507 {
1508         return NULL;
1509 }
1510 #endif
1511
1512 static const struct cd_list_entry ide_cd_quirks_list[] = {
1513         /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1514         { "SAMSUNG CD-ROM SCR-3231", NULL,   IDE_AFLAG_NO_SPEED_SELECT       },
1515         /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1516         { "NEC CD-ROM DRIVE:260",    "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1517                                              IDE_AFLAG_PRE_ATAPI12,          },
1518         /* Vertos 300, some versions of this drive like to talk BCD. */
1519         { "V003S0DS",                NULL,   IDE_AFLAG_VERTOS_300_SSD,       },
1520         /* Vertos 600 ESD. */
1521         { "V006E0DS",                NULL,   IDE_AFLAG_VERTOS_600_ESD,       },
1522         /*
1523          * Sanyo 3 CD changer uses a non-standard command for CD changing
1524          * (by default standard ATAPI support for CD changers is used).
1525          */
1526         { "CD-ROM CDR-C3 G",         NULL,   IDE_AFLAG_SANYO_3CD             },
1527         { "CD-ROM CDR-C3G",          NULL,   IDE_AFLAG_SANYO_3CD             },
1528         { "CD-ROM CDR_C36",          NULL,   IDE_AFLAG_SANYO_3CD             },
1529         /* Stingray 8X CD-ROM. */
1530         { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1531         /*
1532          * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1533          * mode sense page capabilities size, but older drives break.
1534          */
1535         { "ATAPI CD ROM DRIVE 50X MAX", NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1536         { "WPI CDS-32X",                NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1537         /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1538         { "",                        "241N", IDE_AFLAG_LE_SPEED_FIELDS       },
1539         /*
1540          * Some drives used by Apple don't advertise audio play
1541          * but they do support reading TOC & audio datas.
1542          */
1543         { "MATSHITADVD-ROM SR-8187", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1544         { "MATSHITADVD-ROM SR-8186", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1545         { "MATSHITADVD-ROM SR-8176", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1546         { "MATSHITADVD-ROM SR-8174", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1547         { "Optiarc DVD RW AD-5200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1548         { "Optiarc DVD RW AD-7200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1549         { "Optiarc DVD RW AD-7543A", NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1550         { "TEAC CD-ROM CD-224E",     NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1551         { NULL, NULL, 0 }
1552 };
1553
1554 static unsigned int ide_cd_flags(u16 *id)
1555 {
1556         const struct cd_list_entry *cle = ide_cd_quirks_list;
1557
1558         while (cle->id_model) {
1559                 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1560                     (cle->id_firmware == NULL ||
1561                      strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1562                         return cle->cd_flags;
1563                 cle++;
1564         }
1565
1566         return 0;
1567 }
1568
1569 static int ide_cdrom_setup(ide_drive_t *drive)
1570 {
1571         struct cdrom_info *cd = drive->driver_data;
1572         struct cdrom_device_info *cdi = &cd->devinfo;
1573         struct request_queue *q = drive->queue;
1574         u16 *id = drive->id;
1575         char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1576         int nslots;
1577
1578         ide_debug_log(IDE_DBG_PROBE, "enter");
1579
1580         blk_queue_prep_rq(q, ide_cdrom_prep_fn);
1581         blk_queue_dma_alignment(q, 31);
1582         blk_queue_update_dma_pad(q, 15);
1583
1584         q->unplug_delay = max((1 * HZ) / 1000, 1);
1585
1586         drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1587         drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1588
1589         if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1590             fw_rev[4] == '1' && fw_rev[6] <= '2')
1591                 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1592                                      IDE_AFLAG_TOCADDR_AS_BCD);
1593         else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1594                  fw_rev[4] == '1' && fw_rev[6] <= '2')
1595                 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1596         else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1597                 /* 3 => use CD in slot 0 */
1598                 cdi->sanyo_slot = 3;
1599
1600         nslots = ide_cdrom_probe_capabilities(drive);
1601
1602         blk_queue_hardsect_size(q, CD_FRAMESIZE);
1603
1604         if (ide_cdrom_register(drive, nslots)) {
1605                 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1606                                 " cdrom driver.\n", drive->name, __func__);
1607                 cd->devinfo.handle = NULL;
1608                 return 1;
1609         }
1610
1611         ide_proc_register_driver(drive, cd->driver);
1612         return 0;
1613 }
1614
1615 static void ide_cd_remove(ide_drive_t *drive)
1616 {
1617         struct cdrom_info *info = drive->driver_data;
1618
1619         ide_debug_log(IDE_DBG_FUNC, "enter");
1620
1621         ide_proc_unregister_driver(drive, info->driver);
1622         device_del(&info->dev);
1623         del_gendisk(info->disk);
1624
1625         mutex_lock(&idecd_ref_mutex);
1626         put_device(&info->dev);
1627         mutex_unlock(&idecd_ref_mutex);
1628 }
1629
1630 static void ide_cd_release(struct device *dev)
1631 {
1632         struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
1633         struct cdrom_device_info *devinfo = &info->devinfo;
1634         ide_drive_t *drive = info->drive;
1635         struct gendisk *g = info->disk;
1636
1637         ide_debug_log(IDE_DBG_FUNC, "enter");
1638
1639         kfree(info->toc);
1640         if (devinfo->handle == drive)
1641                 unregister_cdrom(devinfo);
1642         drive->driver_data = NULL;
1643         blk_queue_prep_rq(drive->queue, NULL);
1644         g->private_data = NULL;
1645         put_disk(g);
1646         kfree(info);
1647 }
1648
1649 static int ide_cd_probe(ide_drive_t *);
1650
1651 static struct ide_driver ide_cdrom_driver = {
1652         .gen_driver = {
1653                 .owner          = THIS_MODULE,
1654                 .name           = "ide-cdrom",
1655                 .bus            = &ide_bus_type,
1656         },
1657         .probe                  = ide_cd_probe,
1658         .remove                 = ide_cd_remove,
1659         .version                = IDECD_VERSION,
1660         .do_request             = ide_cd_do_request,
1661 #ifdef CONFIG_IDE_PROC_FS
1662         .proc_entries           = ide_cd_proc_entries,
1663         .proc_devsets           = ide_cd_proc_devsets,
1664 #endif
1665 };
1666
1667 static int idecd_open(struct block_device *bdev, fmode_t mode)
1668 {
1669         struct cdrom_info *info = ide_cd_get(bdev->bd_disk);
1670         int rc = -ENOMEM;
1671
1672         if (!info)
1673                 return -ENXIO;
1674
1675         rc = cdrom_open(&info->devinfo, bdev, mode);
1676
1677         if (rc < 0)
1678                 ide_cd_put(info);
1679
1680         return rc;
1681 }
1682
1683 static int idecd_release(struct gendisk *disk, fmode_t mode)
1684 {
1685         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1686
1687         cdrom_release(&info->devinfo, mode);
1688
1689         ide_cd_put(info);
1690
1691         return 0;
1692 }
1693
1694 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1695 {
1696         struct packet_command cgc;
1697         char buffer[16];
1698         int stat;
1699         char spindown;
1700
1701         if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1702                 return -EFAULT;
1703
1704         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1705
1706         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1707         if (stat)
1708                 return stat;
1709
1710         buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1711         return cdrom_mode_select(cdi, &cgc);
1712 }
1713
1714 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1715 {
1716         struct packet_command cgc;
1717         char buffer[16];
1718         int stat;
1719         char spindown;
1720
1721         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1722
1723         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1724         if (stat)
1725                 return stat;
1726
1727         spindown = buffer[11] & 0x0f;
1728         if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1729                 return -EFAULT;
1730         return 0;
1731 }
1732
1733 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1734                         unsigned int cmd, unsigned long arg)
1735 {
1736         struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1737         int err;
1738
1739         switch (cmd) {
1740         case CDROMSETSPINDOWN:
1741                 return idecd_set_spindown(&info->devinfo, arg);
1742         case CDROMGETSPINDOWN:
1743                 return idecd_get_spindown(&info->devinfo, arg);
1744         default:
1745                 break;
1746         }
1747
1748         err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1749         if (err == -EINVAL)
1750                 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
1751
1752         return err;
1753 }
1754
1755 static int idecd_media_changed(struct gendisk *disk)
1756 {
1757         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1758         return cdrom_media_changed(&info->devinfo);
1759 }
1760
1761 static int idecd_revalidate_disk(struct gendisk *disk)
1762 {
1763         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1764         struct request_sense sense;
1765
1766         ide_cd_read_toc(info->drive, &sense);
1767
1768         return  0;
1769 }
1770
1771 static struct block_device_operations idecd_ops = {
1772         .owner                  = THIS_MODULE,
1773         .open                   = idecd_open,
1774         .release                = idecd_release,
1775         .locked_ioctl           = idecd_ioctl,
1776         .media_changed          = idecd_media_changed,
1777         .revalidate_disk        = idecd_revalidate_disk
1778 };
1779
1780 /* module options */
1781 static unsigned long debug_mask;
1782 module_param(debug_mask, ulong, 0644);
1783
1784 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1785
1786 static int ide_cd_probe(ide_drive_t *drive)
1787 {
1788         struct cdrom_info *info;
1789         struct gendisk *g;
1790         struct request_sense sense;
1791
1792         ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x",
1793                                      drive->driver_req, drive->media);
1794
1795         if (!strstr("ide-cdrom", drive->driver_req))
1796                 goto failed;
1797
1798         if (drive->media != ide_cdrom && drive->media != ide_optical)
1799                 goto failed;
1800
1801         drive->debug_mask = debug_mask;
1802         drive->irq_handler = cdrom_newpc_intr;
1803
1804         info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
1805         if (info == NULL) {
1806                 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
1807                                 drive->name);
1808                 goto failed;
1809         }
1810
1811         g = alloc_disk(1 << PARTN_BITS);
1812         if (!g)
1813                 goto out_free_cd;
1814
1815         ide_init_disk(g, drive);
1816
1817         info->dev.parent = &drive->gendev;
1818         info->dev.release = ide_cd_release;
1819         dev_set_name(&info->dev, dev_name(&drive->gendev));
1820
1821         if (device_register(&info->dev))
1822                 goto out_free_disk;
1823
1824         info->drive = drive;
1825         info->driver = &ide_cdrom_driver;
1826         info->disk = g;
1827
1828         g->private_data = &info->driver;
1829
1830         drive->driver_data = info;
1831
1832         g->minors = 1;
1833         g->driverfs_dev = &drive->gendev;
1834         g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
1835         if (ide_cdrom_setup(drive)) {
1836                 put_device(&info->dev);
1837                 goto failed;
1838         }
1839
1840         ide_cd_read_toc(drive, &sense);
1841         g->fops = &idecd_ops;
1842         g->flags |= GENHD_FL_REMOVABLE;
1843         add_disk(g);
1844         return 0;
1845
1846 out_free_disk:
1847         put_disk(g);
1848 out_free_cd:
1849         kfree(info);
1850 failed:
1851         return -ENODEV;
1852 }
1853
1854 static void __exit ide_cdrom_exit(void)
1855 {
1856         driver_unregister(&ide_cdrom_driver.gen_driver);
1857 }
1858
1859 static int __init ide_cdrom_init(void)
1860 {
1861         printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
1862         return driver_register(&ide_cdrom_driver.gen_driver);
1863 }
1864
1865 MODULE_ALIAS("ide:*m-cdrom*");
1866 MODULE_ALIAS("ide-cd");
1867 module_init(ide_cdrom_init);
1868 module_exit(ide_cdrom_exit);
1869 MODULE_LICENSE("GPL");