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  * Returns:
 270  * 0: if the request should be continued.
 271  * 1: if the request will be going through error recovery.
 272  * 2: if the request should be ended.
 273  */
 274 static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
 275 {
 276         ide_hwif_t *hwif = drive->hwif;
 277         struct request *rq = hwif->rq;
 278         int stat, err, sense_key;
 279
 280         /* check for errors */
 281         stat = hwif->tp_ops->read_status(hwif);
 282
 283         if (stat_ret)
 284                 *stat_ret = stat;
 285
 286         if (OK_STAT(stat, good_stat, BAD_R_STAT))
 287                 return 0;
 288
 289         /* get the IDE error register */
 290         err = ide_read_error(drive);
 291         sense_key = err >> 4;
 292
 293         ide_debug_log(IDE_DBG_RQ, "stat: 0x%x, good_stat: 0x%x, cmd[0]: 0x%x, "
 294                                   "rq->cmd_type: 0x%x, err: 0x%x",
 295                                   stat, good_stat, rq->cmd[0], rq->cmd_type,
 296                                   err);
 297
 298         if (blk_sense_request(rq)) {
 299                 /*
 300                  * We got an error trying to get sense info from the drive
 301                  * (probably while trying to recover from a former error).
 302                  * Just give up.
 303                  */
 304                 rq->cmd_flags |= REQ_FAILED;
 305                 return 2;
 306         } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) {
 307                 /* All other functions, except for READ. */
 308
 309                 /*
 310                  * if we have an error, pass back CHECK_CONDITION as the
 311                  * scsi status byte
 312                  */
 313                 if (blk_pc_request(rq) && !rq->errors)
 314                         rq->errors = SAM_STAT_CHECK_CONDITION;
 315
 316                 /* check for tray open */
 317                 if (sense_key == NOT_READY) {
 318                         cdrom_saw_media_change(drive);
 319                 } else if (sense_key == UNIT_ATTENTION) {
 320                         /* check for media change */
 321                         cdrom_saw_media_change(drive);
 322                         return 0;
 323                 } else if (sense_key == ILLEGAL_REQUEST &&
 324                            rq->cmd[0] == GPCMD_START_STOP_UNIT) {
 325                         /*
 326                          * Don't print error message for this condition--
 327                          * SFF8090i indicates that 5/24/00 is the correct
 328                          * response to a request to close the tray if the
 329                          * drive doesn't have that capability.
 330                          * cdrom_log_sense() knows this!
 331                          */
 332                 } else if (!(rq->cmd_flags & REQ_QUIET)) {
 333                         /* otherwise, print an error */
 334                         ide_dump_status(drive, "packet command error", stat);
 335                 }
 336
 337                 rq->cmd_flags |= REQ_FAILED;
 338
 339                 /*
 340                  * instead of playing games with moving completions around,
 341                  * remove failed request completely and end it when the
 342                  * request sense has completed
 343                  */
 344                 goto end_request;
 345
 346         } else if (blk_fs_request(rq)) {
 347                 int do_end_request = 0;
 348
 349                 /* handle errors from READ and WRITE requests */
 350
 351                 if (blk_noretry_request(rq))
 352                         do_end_request = 1;
 353
 354                 if (sense_key == NOT_READY) {
 355                         /* tray open */
 356                         if (rq_data_dir(rq) == READ) {
 357                                 cdrom_saw_media_change(drive);
 358
 359                                 /* fail the request */
 360                                 printk(KERN_ERR PFX "%s: tray open\n",
 361                                                 drive->name);
 362                                 do_end_request = 1;
 363                         } else {
 364                                 struct cdrom_info *info = drive->driver_data;
 365
 366                                 /*
 367                                  * Allow the drive 5 seconds to recover, some
 368                                  * devices will return this error while flushing
 369                                  * data from cache.
 370                                  */
 371                                 if (!rq->errors)
 372                                         info->write_timeout = jiffies +
 373                                                         ATAPI_WAIT_WRITE_BUSY;
 374                                 rq->errors = 1;
 375                                 if (time_after(jiffies, info->write_timeout))
 376                                         do_end_request = 1;
 377                                 else {
 378                                         struct request_queue *q = drive->queue;
 379                                         unsigned long flags;
 380
 381                                         /*
 382                                          * take a breather relying on the unplug
 383                                          * timer to kick us again
 384                                          */
 385                                         spin_lock_irqsave(q->queue_lock, flags);
 386                                         blk_plug_device(q);
 387                                         spin_unlock_irqrestore(q->queue_lock, flags);
 388
 389                                         return 1;
 390                                 }
 391                         }
 392                 } else if (sense_key == UNIT_ATTENTION) {
 393                         /* media change */
 394                         cdrom_saw_media_change(drive);
 395
 396                         /*
 397                          * Arrange to retry the request but be sure to give up
 398                          * if we've retried too many times.
 399                          */
 400                         if (++rq->errors > ERROR_MAX)
 401                                 do_end_request = 1;
 402                 } else if (sense_key == ILLEGAL_REQUEST ||
 403                            sense_key == DATA_PROTECT) {
 404                         /*
 405                          * No point in retrying after an illegal request or data
 406                          * protect error.
 407                          */
 408                         ide_dump_status(drive, "command error", stat);
 409                         do_end_request = 1;
 410                 } else if (sense_key == MEDIUM_ERROR) {
 411                         /*
 412                          * No point in re-trying a zillion times on a bad
 413                          * sector. If we got here the error is not correctable.
 414                          */
 415                         ide_dump_status(drive, "media error (bad sector)",
 416                                         stat);
 417                         do_end_request = 1;
 418                 } else if (sense_key == BLANK_CHECK) {
 419                         /* disk appears blank ?? */
 420                         ide_dump_status(drive, "media error (blank)", stat);
 421                         do_end_request = 1;
 422                 } else if ((err & ~ATA_ABORTED) != 0) {
 423                         /* go to the default handler for other errors */
 424                         ide_error(drive, "cdrom_decode_status", stat);
 425                         return 1;
 426                 } else if ((++rq->errors > ERROR_MAX)) {
 427                         /* we've racked up too many retries, abort */
 428                         do_end_request = 1;
 429                 }
 430
 431                 /*
 432                  * End a request through request sense analysis when we have
 433                  * sense data. We need this in order to perform end of media
 434                  * processing.
 435                  */
 436                 if (do_end_request)
 437                         goto end_request;
 438
 439                 /*
 440                  * If we got a CHECK_CONDITION status, queue
 441                  * a request sense command.
 442                  */
 443                 if (stat & ATA_ERR)
 444                         cdrom_queue_request_sense(drive, NULL, NULL);
 445                 return 1;
 446         } else {
 447                 blk_dump_rq_flags(rq, PFX "bad rq");
 448                 return 2;
 449         }
 450
 451 end_request:
 452         if (stat & ATA_ERR) {
 453                 struct request_queue *q = drive->queue;
 454                 unsigned long flags;
 455
 456                 spin_lock_irqsave(q->queue_lock, flags);
 457                 blkdev_dequeue_request(rq);
 458                 spin_unlock_irqrestore(q->queue_lock, flags);
 459
 460                 hwif->rq = NULL;
 461
 462                 cdrom_queue_request_sense(drive, rq->sense, rq);
 463                 return 1;
 464         } else
 465                 return 2;
 466 }
 467
 468 /*
 469  * Check the contents of the interrupt reason register from the cdrom
 470  * and attempt to recover if there are problems.  Returns  0 if everything's
 471  * ok; nonzero if the request has been terminated.
 472  */
 473 static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
 474                                 int len, int ireason, int rw)
 475 {
 476         ide_hwif_t *hwif = drive->hwif;
 477
 478         ide_debug_log(IDE_DBG_FUNC, "ireason: 0x%x, rw: 0x%x", ireason, rw);
 479
 480         /*
 481          * ireason == 0: the drive wants to receive data from us
 482          * ireason == 2: the drive is expecting to transfer data to us
 483          */
 484         if (ireason == (!rw << 1))
 485                 return 0;
 486         else if (ireason == (rw << 1)) {
 487
 488                 /* whoops... */
 489                 printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n",
 490                                 drive->name, __func__);
 491
 492                 ide_pad_transfer(drive, rw, len);
 493         } else  if (rw == 0 && ireason == 1) {
 494                 /*
 495                  * Some drives (ASUS) seem to tell us that status info is
 496                  * available.  Just get it and ignore.
 497                  */
 498                 (void)hwif->tp_ops->read_status(hwif);
 499                 return 0;
 500         } else {
 501                 /* drive wants a command packet, or invalid ireason... */
 502                 printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n",
 503                                 drive->name, __func__, ireason);
 504         }
 505
 506         if (rq->cmd_type == REQ_TYPE_ATA_PC)
 507                 rq->cmd_flags |= REQ_FAILED;
 508
 509         return -1;
 510 }
 511
 512 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct ide_cmd *cmd)
 513 {
 514         struct request *rq = cmd->rq;
 515
 516         ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]);
 517
 518         /*
 519          * Some of the trailing request sense fields are optional,
 520          * and some drives don't send them.  Sigh.
 521          */
 522         if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
 523             cmd->nleft > 0 && cmd->nleft <= 5) {
 524                 unsigned int ofs = cmd->nbytes - cmd->nleft;
 525
 526                 while (cmd->nleft > 0) {
 527                         *((u8 *)rq->data + ofs++) = 0;
 528                         cmd->nleft--;
 529                 }
 530         }
 531 }
 532
 533 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
 534                     int write, void *buffer, unsigned *bufflen,
 535                     struct request_sense *sense, int timeout,
 536                     unsigned int cmd_flags)
 537 {
 538         struct cdrom_info *info = drive->driver_data;
 539         struct request_sense local_sense;
 540         int retries = 10;
 541         unsigned int flags = 0;
 542
 543         if (!sense)
 544                 sense = &local_sense;
 545
 546         ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, "
 547                                   "cmd_flags: 0x%x",
 548                                   cmd[0], write, timeout, cmd_flags);
 549
 550         /* start of retry loop */
 551         do {
 552                 struct request *rq;
 553                 int error;
 554
 555                 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
 556
 557                 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
 558                 rq->cmd_type = REQ_TYPE_ATA_PC;
 559                 rq->sense = sense;
 560                 rq->cmd_flags |= cmd_flags;
 561                 rq->timeout = timeout;
 562                 if (buffer) {
 563                         rq->data = buffer;
 564                         rq->data_len = *bufflen;
 565                 }
 566
 567                 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
 568
 569                 if (buffer)
 570                         *bufflen = rq->data_len;
 571
 572                 flags = rq->cmd_flags;
 573                 blk_put_request(rq);
 574
 575                 /*
 576                  * FIXME: we should probably abort/retry or something in case of
 577                  * failure.
 578                  */
 579                 if (flags & REQ_FAILED) {
 580                         /*
 581                          * The request failed.  Retry if it was due to a unit
 582                          * attention status (usually means media was changed).
 583                          */
 584                         struct request_sense *reqbuf = sense;
 585
 586                         if (reqbuf->sense_key == UNIT_ATTENTION)
 587                                 cdrom_saw_media_change(drive);
 588                         else if (reqbuf->sense_key == NOT_READY &&
 589                                  reqbuf->asc == 4 && reqbuf->ascq != 4) {
 590                                 /*
 591                                  * The drive is in the process of loading
 592                                  * a disk.  Retry, but wait a little to give
 593                                  * the drive time to complete the load.
 594                                  */
 595                                 ssleep(2);
 596                         } else {
 597                                 /* otherwise, don't retry */
 598                                 retries = 0;
 599                         }
 600                         --retries;
 601                 }
 602
 603                 /* end of retry loop */
 604         } while ((flags & REQ_FAILED) && retries >= 0);
 605
 606         /* return an error if the command failed */
 607         return (flags & REQ_FAILED) ? -EIO : 0;
 608 }
 609
 610 static void ide_cd_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
 611 {
 612         unsigned int nr_bytes = cmd->nbytes - cmd->nleft;
 613
 614         if (cmd->tf_flags & IDE_TFLAG_WRITE)
 615                 nr_bytes -= cmd->last_xfer_len;
 616
 617         if (nr_bytes > 0)
 618                 ide_complete_rq(drive, 0, nr_bytes);
 619 }
 620
 621 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 622 {
 623         ide_hwif_t *hwif = drive->hwif;
 624         struct ide_cmd *cmd = &hwif->cmd;
 625         struct request *rq = hwif->rq;
 626         ide_expiry_t *expiry = NULL;
 627         int dma_error = 0, dma, stat, thislen, uptodate = 0;
 628         int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc, nsectors;
 629         int sense = blk_sense_request(rq);
 630         unsigned int timeout;
 631         u16 len;
 632         u8 ireason;
 633
 634         ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x",
 635                                   rq->cmd[0], write);
 636
 637         /* check for errors */
 638         dma = drive->dma;
 639         if (dma) {
 640                 drive->dma = 0;
 641                 drive->waiting_for_dma = 0;
 642                 dma_error = hwif->dma_ops->dma_end(drive);
 643                 ide_dma_unmap_sg(drive, cmd);
 644                 if (dma_error) {
 645                         printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
 646                                         write ? "write" : "read");
 647                         ide_dma_off(drive);
 648                 }
 649         }
 650
 651         rc = cdrom_decode_status(drive, 0, &stat);
 652         if (rc) {
 653                 if (rc == 2)
 654                         goto out_end;
 655                 return ide_stopped;
 656         }
 657
 658         /* using dma, transfer is complete now */
 659         if (dma) {
 660                 if (dma_error)
 661                         return ide_error(drive, "dma error", stat);
 662                 uptodate = 1;
 663                 goto out_end;
 664         }
 665
 666         ide_read_bcount_and_ireason(drive, &len, &ireason);
 667
 668         thislen = blk_fs_request(rq) ? len : cmd->nleft;
 669         if (thislen > len)
 670                 thislen = len;
 671
 672         ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d",
 673                                   stat, thislen);
 674
 675         /* If DRQ is clear, the command has completed. */
 676         if ((stat & ATA_DRQ) == 0) {
 677                 if (blk_fs_request(rq)) {
 678                         /*
 679                          * If we're not done reading/writing, complain.
 680                          * Otherwise, complete the command normally.
 681                          */
 682                         uptodate = 1;
 683                         if (cmd->nleft > 0) {
 684                                 printk(KERN_ERR PFX "%s: %s: data underrun "
 685                                         "(%u bytes)\n", drive->name, __func__,
 686                                         cmd->nleft);
 687                                 if (!write)
 688                                         rq->cmd_flags |= REQ_FAILED;
 689                                 uptodate = 0;
 690                         }
 691                 } else if (!blk_pc_request(rq)) {
 692                         ide_cd_request_sense_fixup(drive, cmd);
 693                         /* complain if we still have data left to transfer */
 694                         uptodate = cmd->nleft ? 0 : 1;
 695                         if (uptodate == 0)
 696                                 rq->cmd_flags |= REQ_FAILED;
 697                 }
 698                 goto out_end;
 699         }
 700
 701         /* check which way to transfer data */
 702         rc = ide_cd_check_ireason(drive, rq, len, ireason, write);
 703         if (rc)
 704                 goto out_end;
 705
 706         cmd->last_xfer_len = 0;
 707
 708         ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, "
 709                                   "ireason: 0x%x",
 710                                   rq->cmd_type, ireason);
 711
 712         /* transfer data */
 713         while (thislen > 0) {
 714                 int blen = min_t(int, thislen, cmd->nleft);
 715
 716                 if (cmd->nleft == 0)
 717                         break;
 718
 719                 ide_pio_bytes(drive, cmd, write, blen);
 720                 cmd->last_xfer_len += blen;
 721
 722                 thislen -= blen;
 723                 len -= blen;
 724
 725                 if (sense && write == 0)
 726                         rq->sense_len += blen;
 727         }
 728
 729         /* pad, if necessary */
 730         if (len > 0) {
 731                 if (blk_fs_request(rq) == 0 || write == 0)
 732                         ide_pad_transfer(drive, write, len);
 733                 else {
 734                         printk(KERN_ERR PFX "%s: confused, missing data\n",
 735                                 drive->name);
 736                         blk_dump_rq_flags(rq, "cdrom_newpc_intr");
 737                 }
 738         }
 739
 740         if (blk_pc_request(rq)) {
 741                 timeout = rq->timeout;
 742         } else {
 743                 timeout = ATAPI_WAIT_PC;
 744                 if (!blk_fs_request(rq))
 745                         expiry = ide_cd_expiry;
 746         }
 747
 748         hwif->expiry = expiry;
 749         ide_set_handler(drive, cdrom_newpc_intr, timeout);
 750         return ide_started;
 751
 752 out_end:
 753         if (blk_pc_request(rq) && rc == 0) {
 754                 unsigned int dlen = rq->data_len;
 755
 756                 rq->data_len = 0;
 757
 758                 if (blk_end_request(rq, 0, dlen))
 759                         BUG();
 760
 761                 hwif->rq = NULL;
 762         } else {
 763                 if (sense && uptodate)
 764                         ide_cd_complete_failed_rq(drive, rq);
 765
 766                 if (blk_fs_request(rq)) {
 767                         if (cmd->nleft == 0)
 768                                 uptodate = 1;
 769                 } else {
 770                         if (uptodate <= 0 && rq->errors == 0)
 771                                 rq->errors = -EIO;
 772                 }
 773
 774                 if (uptodate == 0)
 775                         ide_cd_error_cmd(drive, cmd);
 776
 777                 /* make sure it's fully ended */
 778                 if (blk_pc_request(rq))
 779                         nsectors = (rq->data_len + 511) >> 9;
 780                 else
 781                         nsectors = rq->hard_nr_sectors;
 782
 783                 if (nsectors == 0)
 784                         nsectors = 1;
 785
 786                 if (blk_fs_request(rq) == 0) {
 787                         rq->data_len -= (cmd->nbytes - cmd->nleft);
 788                         if (uptodate == 0 && (cmd->tf_flags & IDE_TFLAG_WRITE))
 789                                 rq->data_len += cmd->last_xfer_len;
 790                 }
 791
 792                 ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
 793
 794                 if (sense && rc == 2)
 795                         ide_error(drive, "request sense failure", stat);
 796         }
 797         return ide_stopped;
 798 }
 799
 800 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
 801 {
 802         struct cdrom_info *cd = drive->driver_data;
 803         struct request_queue *q = drive->queue;
 804         int write = rq_data_dir(rq) == WRITE;
 805         unsigned short sectors_per_frame =
 806                 queue_hardsect_size(q) >> SECTOR_BITS;
 807
 808         ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, rq->cmd_flags: 0x%x, "
 809                                   "secs_per_frame: %u",
 810                                   rq->cmd[0], rq->cmd_flags, sectors_per_frame);
 811
 812         if (write) {
 813                 /* disk has become write protected */
 814                 if (get_disk_ro(cd->disk))
 815                         return ide_stopped;
 816         } else {
 817                 /*
 818                  * We may be retrying this request after an error.  Fix up any
 819                  * weirdness which might be present in the request packet.
 820                  */
 821                 q->prep_rq_fn(q, rq);
 822         }
 823
 824         /* fs requests *must* be hardware frame aligned */
 825         if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
 826             (rq->sector & (sectors_per_frame - 1)))
 827                 return ide_stopped;
 828
 829         /* use DMA, if possible */
 830         drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
 831
 832         if (write)
 833                 cd->devinfo.media_written = 1;
 834
 835         rq->timeout = ATAPI_WAIT_PC;
 836
 837         return ide_started;
 838 }
 839
 840 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
 841 {
 842
 843         ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
 844                                   rq->cmd[0], rq->cmd_type);
 845
 846         if (blk_pc_request(rq))
 847                 rq->cmd_flags |= REQ_QUIET;
 848         else
 849                 rq->cmd_flags &= ~REQ_FAILED;
 850
 851         drive->dma = 0;
 852
 853         /* sg request */
 854         if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) {
 855                 struct request_queue *q = drive->queue;
 856                 unsigned int alignment;
 857                 char *buf;
 858
 859                 if (rq->bio)
 860                         buf = bio_data(rq->bio);
 861                 else
 862                         buf = rq->data;
 863
 864                 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
 865
 866                 /*
 867                  * check if dma is safe
 868                  *
 869                  * NOTE! The "len" and "addr" checks should possibly have
 870                  * separate masks.
 871                  */
 872                 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
 873                 if ((unsigned long)buf & alignment
 874                     || rq->data_len & q->dma_pad_mask
 875                     || object_is_on_stack(buf))
 876                         drive->dma = 0;
 877         }
 878 }
 879
 880 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
 881                                         sector_t block)
 882 {
 883         struct ide_cmd cmd;
 884         int uptodate = 0, nsectors;
 885
 886         ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
 887                                   rq->cmd[0], (unsigned long long)block);
 888
 889         if (drive->debug_mask & IDE_DBG_RQ)
 890                 blk_dump_rq_flags(rq, "ide_cd_do_request");
 891
 892         if (blk_fs_request(rq)) {
 893                 if (cdrom_start_rw(drive, rq) == ide_stopped)
 894                         goto out_end;
 895         } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
 896                    rq->cmd_type == REQ_TYPE_ATA_PC) {
 897                 if (!rq->timeout)
 898                         rq->timeout = ATAPI_WAIT_PC;
 899
 900                 cdrom_do_block_pc(drive, rq);
 901         } else if (blk_special_request(rq)) {
 902                 /* right now this can only be a reset... */
 903                 uptodate = 1;
 904                 goto out_end;
 905         } else {
 906                 blk_dump_rq_flags(rq, DRV_NAME " bad flags");
 907                 if (rq->errors == 0)
 908                         rq->errors = -EIO;
 909                 goto out_end;
 910         }
 911
 912         memset(&cmd, 0, sizeof(cmd));
 913
 914         if (rq_data_dir(rq))
 915                 cmd.tf_flags |= IDE_TFLAG_WRITE;
 916
 917         cmd.rq = rq;
 918
 919         if (blk_fs_request(rq) || rq->data_len) {
 920                 ide_init_sg_cmd(&cmd, blk_fs_request(rq) ? (rq->nr_sectors << 9)
 921                                                          : rq->data_len);
 922                 ide_map_sg(drive, &cmd);
 923         }
 924
 925         return ide_issue_pc(drive, &cmd);
 926 out_end:
 927         nsectors = rq->hard_nr_sectors;
 928
 929         if (nsectors == 0)
 930                 nsectors = 1;
 931
 932         ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
 933
 934         return ide_stopped;
 935 }
 936
 937 /*
 938  * Ioctl handling.
 939  *
 940  * Routines which queue packet commands take as a final argument a pointer to a
 941  * request_sense struct. If execution of the command results in an error with a
 942  * CHECK CONDITION status, this structure will be filled with the results of the
 943  * subsequent request sense command. The pointer can also be NULL, in which case
 944  * no sense information is returned.
 945  */
 946 static void msf_from_bcd(struct atapi_msf *msf)
 947 {
 948         msf->minute = bcd2bin(msf->minute);
 949         msf->second = bcd2bin(msf->second);
 950         msf->frame  = bcd2bin(msf->frame);
 951 }
 952
 953 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
 954 {
 955         struct cdrom_info *info = drive->driver_data;
 956         struct cdrom_device_info *cdi = &info->devinfo;
 957         unsigned char cmd[BLK_MAX_CDB];
 958
 959         ide_debug_log(IDE_DBG_FUNC, "enter");
 960
 961         memset(cmd, 0, BLK_MAX_CDB);
 962         cmd[0] = GPCMD_TEST_UNIT_READY;
 963
 964         /*
 965          * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
 966          * instead of supporting the LOAD_UNLOAD opcode.
 967          */
 968         cmd[7] = cdi->sanyo_slot % 3;
 969
 970         return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
 971 }
 972
 973 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
 974                                unsigned long *sectors_per_frame,
 975                                struct request_sense *sense)
 976 {
 977         struct {
 978                 __be32 lba;
 979                 __be32 blocklen;
 980         } capbuf;
 981
 982         int stat;
 983         unsigned char cmd[BLK_MAX_CDB];
 984         unsigned len = sizeof(capbuf);
 985         u32 blocklen;
 986
 987         ide_debug_log(IDE_DBG_FUNC, "enter");
 988
 989         memset(cmd, 0, BLK_MAX_CDB);
 990         cmd[0] = GPCMD_READ_CDVD_CAPACITY;
 991
 992         stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
 993                                REQ_QUIET);
 994         if (stat)
 995                 return stat;
 996
 997         /*
 998          * Sanity check the given block size
 999          */
1000         blocklen = be32_to_cpu(capbuf.blocklen);
1001         switch (blocklen) {
1002         case 512:
1003         case 1024:
1004         case 2048:
1005         case 4096:
1006                 break;
1007         default:
1008                 printk(KERN_ERR PFX "%s: weird block size %u\n",
1009                                 drive->name, blocklen);
1010                 printk(KERN_ERR PFX "%s: default to 2kb block size\n",
1011                                 drive->name);
1012                 blocklen = 2048;
1013                 break;
1014         }
1015
1016         *capacity = 1 + be32_to_cpu(capbuf.lba);
1017         *sectors_per_frame = blocklen >> SECTOR_BITS;
1018
1019         ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu",
1020                                      *capacity, *sectors_per_frame);
1021
1022         return 0;
1023 }
1024
1025 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1026                                 int format, char *buf, int buflen,
1027                                 struct request_sense *sense)
1028 {
1029         unsigned char cmd[BLK_MAX_CDB];
1030
1031         ide_debug_log(IDE_DBG_FUNC, "enter");
1032
1033         memset(cmd, 0, BLK_MAX_CDB);
1034
1035         cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1036         cmd[6] = trackno;
1037         cmd[7] = (buflen >> 8);
1038         cmd[8] = (buflen & 0xff);
1039         cmd[9] = (format << 6);
1040
1041         if (msf_flag)
1042                 cmd[1] = 2;
1043
1044         return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
1045 }
1046
1047 /* Try to read the entire TOC for the disk into our internal buffer. */
1048 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1049 {
1050         int stat, ntracks, i;
1051         struct cdrom_info *info = drive->driver_data;
1052         struct cdrom_device_info *cdi = &info->devinfo;
1053         struct atapi_toc *toc = info->toc;
1054         struct {
1055                 struct atapi_toc_header hdr;
1056                 struct atapi_toc_entry  ent;
1057         } ms_tmp;
1058         long last_written;
1059         unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1060
1061         ide_debug_log(IDE_DBG_FUNC, "enter");
1062
1063         if (toc == NULL) {
1064                 /* try to allocate space */
1065                 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1066                 if (toc == NULL) {
1067                         printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
1068                                         drive->name);
1069                         return -ENOMEM;
1070                 }
1071                 info->toc = toc;
1072         }
1073
1074         /*
1075          * Check to see if the existing data is still valid. If it is,
1076          * just return.
1077          */
1078         (void) cdrom_check_status(drive, sense);
1079
1080         if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
1081                 return 0;
1082
1083         /* try to get the total cdrom capacity and sector size */
1084         stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1085                                    sense);
1086         if (stat)
1087                 toc->capacity = 0x1fffff;
1088
1089         set_capacity(info->disk, toc->capacity * sectors_per_frame);
1090         /* save a private copy of the TOC capacity for error handling */
1091         drive->probed_capacity = toc->capacity * sectors_per_frame;
1092
1093         blk_queue_hardsect_size(drive->queue,
1094                                 sectors_per_frame << SECTOR_BITS);
1095
1096         /* first read just the header, so we know how long the TOC is */
1097         stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1098                                     sizeof(struct atapi_toc_header), sense);
1099         if (stat)
1100                 return stat;
1101
1102         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1103                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1104                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1105         }
1106
1107         ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1108         if (ntracks <= 0)
1109                 return -EIO;
1110         if (ntracks > MAX_TRACKS)
1111                 ntracks = MAX_TRACKS;
1112
1113         /* now read the whole schmeer */
1114         stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1115                                   (char *)&toc->hdr,
1116                                    sizeof(struct atapi_toc_header) +
1117                                    (ntracks + 1) *
1118                                    sizeof(struct atapi_toc_entry), sense);
1119
1120         if (stat && toc->hdr.first_track > 1) {
1121                 /*
1122                  * Cds with CDI tracks only don't have any TOC entries, despite
1123                  * of this the returned values are
1124                  * first_track == last_track = number of CDI tracks + 1,
1125                  * so that this case is indistinguishable from the same layout
1126                  * plus an additional audio track. If we get an error for the
1127                  * regular case, we assume a CDI without additional audio
1128                  * tracks. In this case the readable TOC is empty (CDI tracks
1129                  * are not included) and only holds the Leadout entry.
1130                  *
1131                  * Heiko Eißfeldt.
1132                  */
1133                 ntracks = 0;
1134                 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1135                                            (char *)&toc->hdr,
1136                                            sizeof(struct atapi_toc_header) +
1137                                            (ntracks + 1) *
1138                                            sizeof(struct atapi_toc_entry),
1139                                            sense);
1140                 if (stat)
1141                         return stat;
1142
1143                 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1144                         toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1145                         toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1146                 } else {
1147                         toc->hdr.first_track = CDROM_LEADOUT;
1148                         toc->hdr.last_track = CDROM_LEADOUT;
1149                 }
1150         }
1151
1152         if (stat)
1153                 return stat;
1154
1155         toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1156
1157         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1158                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1159                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1160         }
1161
1162         for (i = 0; i <= ntracks; i++) {
1163                 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1164                         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1165                                 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1166                         msf_from_bcd(&toc->ent[i].addr.msf);
1167                 }
1168                 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1169                                                   toc->ent[i].addr.msf.second,
1170                                                   toc->ent[i].addr.msf.frame);
1171         }
1172
1173         if (toc->hdr.first_track != CDROM_LEADOUT) {
1174                 /* read the multisession information */
1175                 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1176                                            sizeof(ms_tmp), sense);
1177                 if (stat)
1178                         return stat;
1179
1180                 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1181         } else {
1182                 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1183                 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1184                 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1185         }
1186
1187         if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1188                 /* re-read multisession information using MSF format */
1189                 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1190                                            sizeof(ms_tmp), sense);
1191                 if (stat)
1192                         return stat;
1193
1194                 msf_from_bcd(&ms_tmp.ent.addr.msf);
1195                 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1196                                                    ms_tmp.ent.addr.msf.second,
1197                                                    ms_tmp.ent.addr.msf.frame);
1198         }
1199
1200         toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1201
1202         /* now try to get the total cdrom capacity */
1203         stat = cdrom_get_last_written(cdi, &last_written);
1204         if (!stat && (last_written > toc->capacity)) {
1205                 toc->capacity = last_written;
1206                 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1207                 drive->probed_capacity = toc->capacity * sectors_per_frame;
1208         }
1209
1210         /* Remember that we've read this stuff. */
1211         drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1212
1213         return 0;
1214 }
1215
1216 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1217 {
1218         struct cdrom_info *info = drive->driver_data;
1219         struct cdrom_device_info *cdi = &info->devinfo;
1220         struct packet_command cgc;
1221         int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1222
1223         ide_debug_log(IDE_DBG_FUNC, "enter");
1224
1225         if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1226                 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1227
1228         init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1229         do {
1230                 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1231                 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1232                 if (!stat)
1233                         break;
1234         } while (--attempts);
1235         return stat;
1236 }
1237
1238 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1239 {
1240         struct cdrom_info *cd = drive->driver_data;
1241         u16 curspeed, maxspeed;
1242
1243         ide_debug_log(IDE_DBG_FUNC, "enter");
1244
1245         if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1246                 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1247                 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1248         } else {
1249                 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1250                 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1251         }
1252
1253         ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u",
1254                                      curspeed, maxspeed);
1255
1256         cd->current_speed = (curspeed + (176/2)) / 176;
1257         cd->max_speed = (maxspeed + (176/2)) / 176;
1258 }
1259
1260 #define IDE_CD_CAPABILITIES \
1261         (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1262          CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1263          CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1264          CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1265          CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1266
1267 static struct cdrom_device_ops ide_cdrom_dops = {
1268         .open                   = ide_cdrom_open_real,
1269         .release                = ide_cdrom_release_real,
1270         .drive_status           = ide_cdrom_drive_status,
1271         .media_changed          = ide_cdrom_check_media_change_real,
1272         .tray_move              = ide_cdrom_tray_move,
1273         .lock_door              = ide_cdrom_lock_door,
1274         .select_speed           = ide_cdrom_select_speed,
1275         .get_last_session       = ide_cdrom_get_last_session,
1276         .get_mcn                = ide_cdrom_get_mcn,
1277         .reset                  = ide_cdrom_reset,
1278         .audio_ioctl            = ide_cdrom_audio_ioctl,
1279         .capability             = IDE_CD_CAPABILITIES,
1280         .generic_packet         = ide_cdrom_packet,
1281 };
1282
1283 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1284 {
1285         struct cdrom_info *info = drive->driver_data;
1286         struct cdrom_device_info *devinfo = &info->devinfo;
1287
1288         ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots);
1289
1290         devinfo->ops = &ide_cdrom_dops;
1291         devinfo->speed = info->current_speed;
1292         devinfo->capacity = nslots;
1293         devinfo->handle = drive;
1294         strcpy(devinfo->name, drive->name);
1295
1296         if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1297                 devinfo->mask |= CDC_SELECT_SPEED;
1298
1299         devinfo->disk = info->disk;
1300         return register_cdrom(devinfo);
1301 }
1302
1303 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1304 {
1305         struct cdrom_info *cd = drive->driver_data;
1306         struct cdrom_device_info *cdi = &cd->devinfo;
1307         u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1308         mechtype_t mechtype;
1309         int nslots = 1;
1310
1311         ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx",
1312                                      drive->media, drive->atapi_flags);
1313
1314         cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1315                      CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1316                      CDC_MO_DRIVE | CDC_RAM);
1317
1318         if (drive->media == ide_optical) {
1319                 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1320                 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1321                                 drive->name);
1322                 return nslots;
1323         }
1324
1325         if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1326                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1327                 cdi->mask &= ~CDC_PLAY_AUDIO;
1328                 return nslots;
1329         }
1330
1331         /*
1332          * We have to cheat a little here. the packet will eventually be queued
1333          * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1334          * Since this device hasn't been registered with the Uniform layer yet,
1335          * it can't do this. Same goes for cdi->ops.
1336          */
1337         cdi->handle = drive;
1338         cdi->ops = &ide_cdrom_dops;
1339
1340         if (ide_cdrom_get_capabilities(drive, buf))
1341                 return 0;
1342
1343         if ((buf[8 + 6] & 0x01) == 0)
1344                 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1345         if (buf[8 + 6] & 0x08)
1346                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1347         if (buf[8 + 3] & 0x01)
1348                 cdi->mask &= ~CDC_CD_R;
1349         if (buf[8 + 3] & 0x02)
1350                 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1351         if (buf[8 + 2] & 0x38)
1352                 cdi->mask &= ~CDC_DVD;
1353         if (buf[8 + 3] & 0x20)
1354                 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1355         if (buf[8 + 3] & 0x10)
1356                 cdi->mask &= ~CDC_DVD_R;
1357         if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1358                 cdi->mask &= ~CDC_PLAY_AUDIO;
1359
1360         mechtype = buf[8 + 6] >> 5;
1361         if (mechtype == mechtype_caddy ||
1362             mechtype == mechtype_popup ||
1363             (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1364                 cdi->mask |= CDC_CLOSE_TRAY;
1365
1366         if (cdi->sanyo_slot > 0) {
1367                 cdi->mask &= ~CDC_SELECT_DISC;
1368                 nslots = 3;
1369         } else if (mechtype == mechtype_individual_changer ||
1370                    mechtype == mechtype_cartridge_changer) {
1371                 nslots = cdrom_number_of_slots(cdi);
1372                 if (nslots > 1)
1373                         cdi->mask &= ~CDC_SELECT_DISC;
1374         }
1375
1376         ide_cdrom_update_speed(drive, buf);
1377
1378         printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1379
1380         /* don't print speed if the drive reported 0 */
1381         if (cd->max_speed)
1382                 printk(KERN_CONT " %dX", cd->max_speed);
1383
1384         printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1385
1386         if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1387                 printk(KERN_CONT " DVD%s%s",
1388                                  (cdi->mask & CDC_DVD_R) ? "" : "-R",
1389                                  (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1390
1391         if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1392                 printk(KERN_CONT " CD%s%s",
1393                                  (cdi->mask & CDC_CD_R) ? "" : "-R",
1394                                  (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1395
1396         if ((cdi->mask & CDC_SELECT_DISC) == 0)
1397                 printk(KERN_CONT " changer w/%d slots", nslots);
1398         else
1399                 printk(KERN_CONT " drive");
1400
1401         printk(KERN_CONT ", %dkB Cache\n",
1402                          be16_to_cpup((__be16 *)&buf[8 + 12]));
1403
1404         return nslots;
1405 }
1406
1407 /* standard prep_rq_fn that builds 10 byte cmds */
1408 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1409 {
1410         int hard_sect = queue_hardsect_size(q);
1411         long block = (long)rq->hard_sector / (hard_sect >> 9);
1412         unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1413
1414         memset(rq->cmd, 0, BLK_MAX_CDB);
1415
1416         if (rq_data_dir(rq) == READ)
1417                 rq->cmd[0] = GPCMD_READ_10;
1418         else
1419                 rq->cmd[0] = GPCMD_WRITE_10;
1420
1421         /*
1422          * fill in lba
1423          */
1424         rq->cmd[2] = (block >> 24) & 0xff;
1425         rq->cmd[3] = (block >> 16) & 0xff;
1426         rq->cmd[4] = (block >>  8) & 0xff;
1427         rq->cmd[5] = block & 0xff;
1428
1429         /*
1430          * and transfer length
1431          */
1432         rq->cmd[7] = (blocks >> 8) & 0xff;
1433         rq->cmd[8] = blocks & 0xff;
1434         rq->cmd_len = 10;
1435         return BLKPREP_OK;
1436 }
1437
1438 /*
1439  * Most of the SCSI commands are supported directly by ATAPI devices.
1440  * This transform handles the few exceptions.
1441  */
1442 static int ide_cdrom_prep_pc(struct request *rq)
1443 {
1444         u8 *c = rq->cmd;
1445
1446         /* transform 6-byte read/write commands to the 10-byte version */
1447         if (c[0] == READ_6 || c[0] == WRITE_6) {
1448                 c[8] = c[4];
1449                 c[5] = c[3];
1450                 c[4] = c[2];
1451                 c[3] = c[1] & 0x1f;
1452                 c[2] = 0;
1453                 c[1] &= 0xe0;
1454                 c[0] += (READ_10 - READ_6);
1455                 rq->cmd_len = 10;
1456                 return BLKPREP_OK;
1457         }
1458
1459         /*
1460          * it's silly to pretend we understand 6-byte sense commands, just
1461          * reject with ILLEGAL_REQUEST and the caller should take the
1462          * appropriate action
1463          */
1464         if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1465                 rq->errors = ILLEGAL_REQUEST;
1466                 return BLKPREP_KILL;
1467         }
1468
1469         return BLKPREP_OK;
1470 }
1471
1472 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1473 {
1474         if (blk_fs_request(rq))
1475                 return ide_cdrom_prep_fs(q, rq);
1476         else if (blk_pc_request(rq))
1477                 return ide_cdrom_prep_pc(rq);
1478
1479         return 0;
1480 }
1481
1482 struct cd_list_entry {
1483         const char      *id_model;
1484         const char      *id_firmware;
1485         unsigned int    cd_flags;
1486 };
1487
1488 #ifdef CONFIG_IDE_PROC_FS
1489 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1490 {
1491         unsigned long capacity, sectors_per_frame;
1492
1493         if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1494                 return 0;
1495
1496         return capacity * sectors_per_frame;
1497 }
1498
1499 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1500                                         int count, int *eof, void *data)
1501 {
1502         ide_drive_t *drive = data;
1503         int len;
1504
1505         len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1506         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1507 }
1508
1509 static ide_proc_entry_t idecd_proc[] = {
1510         { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1511         { NULL, 0, NULL, NULL }
1512 };
1513
1514 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1515 {
1516         return idecd_proc;
1517 }
1518
1519 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1520 {
1521         return NULL;
1522 }
1523 #endif
1524
1525 static const struct cd_list_entry ide_cd_quirks_list[] = {
1526         /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1527         { "SAMSUNG CD-ROM SCR-3231", NULL,   IDE_AFLAG_NO_SPEED_SELECT       },
1528         /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1529         { "NEC CD-ROM DRIVE:260",    "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1530                                              IDE_AFLAG_PRE_ATAPI12,          },
1531         /* Vertos 300, some versions of this drive like to talk BCD. */
1532         { "V003S0DS",                NULL,   IDE_AFLAG_VERTOS_300_SSD,       },
1533         /* Vertos 600 ESD. */
1534         { "V006E0DS",                NULL,   IDE_AFLAG_VERTOS_600_ESD,       },
1535         /*
1536          * Sanyo 3 CD changer uses a non-standard command for CD changing
1537          * (by default standard ATAPI support for CD changers is used).
1538          */
1539         { "CD-ROM CDR-C3 G",         NULL,   IDE_AFLAG_SANYO_3CD             },
1540         { "CD-ROM CDR-C3G",          NULL,   IDE_AFLAG_SANYO_3CD             },
1541         { "CD-ROM CDR_C36",          NULL,   IDE_AFLAG_SANYO_3CD             },
1542         /* Stingray 8X CD-ROM. */
1543         { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1544         /*
1545          * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1546          * mode sense page capabilities size, but older drives break.
1547          */
1548         { "ATAPI CD ROM DRIVE 50X MAX", NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1549         { "WPI CDS-32X",                NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1550         /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1551         { "",                        "241N", IDE_AFLAG_LE_SPEED_FIELDS       },
1552         /*
1553          * Some drives used by Apple don't advertise audio play
1554          * but they do support reading TOC & audio datas.
1555          */
1556         { "MATSHITADVD-ROM SR-8187", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1557         { "MATSHITADVD-ROM SR-8186", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1558         { "MATSHITADVD-ROM SR-8176", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1559         { "MATSHITADVD-ROM SR-8174", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1560         { "Optiarc DVD RW AD-5200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1561         { "Optiarc DVD RW AD-7200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1562         { "Optiarc DVD RW AD-7543A", NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1563         { "TEAC CD-ROM CD-224E",     NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1564         { NULL, NULL, 0 }
1565 };
1566
1567 static unsigned int ide_cd_flags(u16 *id)
1568 {
1569         const struct cd_list_entry *cle = ide_cd_quirks_list;
1570
1571         while (cle->id_model) {
1572                 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1573                     (cle->id_firmware == NULL ||
1574                      strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1575                         return cle->cd_flags;
1576                 cle++;
1577         }
1578
1579         return 0;
1580 }
1581
1582 static int ide_cdrom_setup(ide_drive_t *drive)
1583 {
1584         struct cdrom_info *cd = drive->driver_data;
1585         struct cdrom_device_info *cdi = &cd->devinfo;
1586         struct request_queue *q = drive->queue;
1587         u16 *id = drive->id;
1588         char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1589         int nslots;
1590
1591         ide_debug_log(IDE_DBG_PROBE, "enter");
1592
1593         blk_queue_prep_rq(q, ide_cdrom_prep_fn);
1594         blk_queue_dma_alignment(q, 31);
1595         blk_queue_update_dma_pad(q, 15);
1596
1597         q->unplug_delay = max((1 * HZ) / 1000, 1);
1598
1599         drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1600         drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1601
1602         if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1603             fw_rev[4] == '1' && fw_rev[6] <= '2')
1604                 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1605                                      IDE_AFLAG_TOCADDR_AS_BCD);
1606         else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1607                  fw_rev[4] == '1' && fw_rev[6] <= '2')
1608                 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1609         else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1610                 /* 3 => use CD in slot 0 */
1611                 cdi->sanyo_slot = 3;
1612
1613         nslots = ide_cdrom_probe_capabilities(drive);
1614
1615         blk_queue_hardsect_size(q, CD_FRAMESIZE);
1616
1617         if (ide_cdrom_register(drive, nslots)) {
1618                 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1619                                 " cdrom driver.\n", drive->name, __func__);
1620                 cd->devinfo.handle = NULL;
1621                 return 1;
1622         }
1623
1624         ide_proc_register_driver(drive, cd->driver);
1625         return 0;
1626 }
1627
1628 static void ide_cd_remove(ide_drive_t *drive)
1629 {
1630         struct cdrom_info *info = drive->driver_data;
1631
1632         ide_debug_log(IDE_DBG_FUNC, "enter");
1633
1634         ide_proc_unregister_driver(drive, info->driver);
1635         device_del(&info->dev);
1636         del_gendisk(info->disk);
1637
1638         mutex_lock(&idecd_ref_mutex);
1639         put_device(&info->dev);
1640         mutex_unlock(&idecd_ref_mutex);
1641 }
1642
1643 static void ide_cd_release(struct device *dev)
1644 {
1645         struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
1646         struct cdrom_device_info *devinfo = &info->devinfo;
1647         ide_drive_t *drive = info->drive;
1648         struct gendisk *g = info->disk;
1649
1650         ide_debug_log(IDE_DBG_FUNC, "enter");
1651
1652         kfree(info->toc);
1653         if (devinfo->handle == drive)
1654                 unregister_cdrom(devinfo);
1655         drive->driver_data = NULL;
1656         blk_queue_prep_rq(drive->queue, NULL);
1657         g->private_data = NULL;
1658         put_disk(g);
1659         kfree(info);
1660 }
1661
1662 static int ide_cd_probe(ide_drive_t *);
1663
1664 static struct ide_driver ide_cdrom_driver = {
1665         .gen_driver = {
1666                 .owner          = THIS_MODULE,
1667                 .name           = "ide-cdrom",
1668                 .bus            = &ide_bus_type,
1669         },
1670         .probe                  = ide_cd_probe,
1671         .remove                 = ide_cd_remove,
1672         .version                = IDECD_VERSION,
1673         .do_request             = ide_cd_do_request,
1674 #ifdef CONFIG_IDE_PROC_FS
1675         .proc_entries           = ide_cd_proc_entries,
1676         .proc_devsets           = ide_cd_proc_devsets,
1677 #endif
1678 };
1679
1680 static int idecd_open(struct block_device *bdev, fmode_t mode)
1681 {
1682         struct cdrom_info *info = ide_cd_get(bdev->bd_disk);
1683         int rc = -ENOMEM;
1684
1685         if (!info)
1686                 return -ENXIO;
1687
1688         rc = cdrom_open(&info->devinfo, bdev, mode);
1689
1690         if (rc < 0)
1691                 ide_cd_put(info);
1692
1693         return rc;
1694 }
1695
1696 static int idecd_release(struct gendisk *disk, fmode_t mode)
1697 {
1698         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1699
1700         cdrom_release(&info->devinfo, mode);
1701
1702         ide_cd_put(info);
1703
1704         return 0;
1705 }
1706
1707 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1708 {
1709         struct packet_command cgc;
1710         char buffer[16];
1711         int stat;
1712         char spindown;
1713
1714         if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1715                 return -EFAULT;
1716
1717         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1718
1719         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1720         if (stat)
1721                 return stat;
1722
1723         buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1724         return cdrom_mode_select(cdi, &cgc);
1725 }
1726
1727 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1728 {
1729         struct packet_command cgc;
1730         char buffer[16];
1731         int stat;
1732         char spindown;
1733
1734         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1735
1736         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1737         if (stat)
1738                 return stat;
1739
1740         spindown = buffer[11] & 0x0f;
1741         if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1742                 return -EFAULT;
1743         return 0;
1744 }
1745
1746 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1747                         unsigned int cmd, unsigned long arg)
1748 {
1749         struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1750         int err;
1751
1752         switch (cmd) {
1753         case CDROMSETSPINDOWN:
1754                 return idecd_set_spindown(&info->devinfo, arg);
1755         case CDROMGETSPINDOWN:
1756                 return idecd_get_spindown(&info->devinfo, arg);
1757         default:
1758                 break;
1759         }
1760
1761         err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1762         if (err == -EINVAL)
1763                 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
1764
1765         return err;
1766 }
1767
1768 static int idecd_media_changed(struct gendisk *disk)
1769 {
1770         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1771         return cdrom_media_changed(&info->devinfo);
1772 }
1773
1774 static int idecd_revalidate_disk(struct gendisk *disk)
1775 {
1776         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1777         struct request_sense sense;
1778
1779         ide_cd_read_toc(info->drive, &sense);
1780
1781         return  0;
1782 }
1783
1784 static struct block_device_operations idecd_ops = {
1785         .owner                  = THIS_MODULE,
1786         .open                   = idecd_open,
1787         .release                = idecd_release,
1788         .locked_ioctl           = idecd_ioctl,
1789         .media_changed          = idecd_media_changed,
1790         .revalidate_disk        = idecd_revalidate_disk
1791 };
1792
1793 /* module options */
1794 static unsigned long debug_mask;
1795 module_param(debug_mask, ulong, 0644);
1796
1797 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1798
1799 static int ide_cd_probe(ide_drive_t *drive)
1800 {
1801         struct cdrom_info *info;
1802         struct gendisk *g;
1803         struct request_sense sense;
1804
1805         ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x",
1806                                      drive->driver_req, drive->media);
1807
1808         if (!strstr("ide-cdrom", drive->driver_req))
1809                 goto failed;
1810
1811         if (drive->media != ide_cdrom && drive->media != ide_optical)
1812                 goto failed;
1813
1814         drive->debug_mask = debug_mask;
1815         drive->irq_handler = cdrom_newpc_intr;
1816
1817         info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
1818         if (info == NULL) {
1819                 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
1820                                 drive->name);
1821                 goto failed;
1822         }
1823
1824         g = alloc_disk(1 << PARTN_BITS);
1825         if (!g)
1826                 goto out_free_cd;
1827
1828         ide_init_disk(g, drive);
1829
1830         info->dev.parent = &drive->gendev;
1831         info->dev.release = ide_cd_release;
1832         dev_set_name(&info->dev, dev_name(&drive->gendev));
1833
1834         if (device_register(&info->dev))
1835                 goto out_free_disk;
1836
1837         info->drive = drive;
1838         info->driver = &ide_cdrom_driver;
1839         info->disk = g;
1840
1841         g->private_data = &info->driver;
1842
1843         drive->driver_data = info;
1844
1845         g->minors = 1;
1846         g->driverfs_dev = &drive->gendev;
1847         g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
1848         if (ide_cdrom_setup(drive)) {
1849                 put_device(&info->dev);
1850                 goto failed;
1851         }
1852
1853         ide_cd_read_toc(drive, &sense);
1854         g->fops = &idecd_ops;
1855         g->flags |= GENHD_FL_REMOVABLE;
1856         add_disk(g);
1857         return 0;
1858
1859 out_free_disk:
1860         put_disk(g);
1861 out_free_cd:
1862         kfree(info);
1863 failed:
1864         return -ENODEV;
1865 }
1866
1867 static void __exit ide_cdrom_exit(void)
1868 {
1869         driver_unregister(&ide_cdrom_driver.gen_driver);
1870 }
1871
1872 static int __init ide_cdrom_init(void)
1873 {
1874         printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
1875         return driver_register(&ide_cdrom_driver.gen_driver);
1876 }
1877
1878 MODULE_ALIAS("ide:*m-cdrom*");
1879 MODULE_ALIAS("ide-cd");
1880 module_init(ide_cdrom_init);
1881 module_exit(ide_cdrom_exit);
1882 MODULE_LICENSE("GPL");