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  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 static void cdrom_end_request(ide_drive_t *drive, int uptodate)
 269 {
 270         struct request *rq = drive->hwif->rq;
 271         int nsectors = rq->hard_cur_sectors;
 272
 273         ide_debug_log(IDE_DBG_FUNC, "cmd: 0x%x, uptodate: 0x%x, nsectors: %d",
 274                                     rq->cmd[0], uptodate, nsectors);
 275
 276         if (blk_sense_request(rq) && uptodate)
 277                 ide_cd_complete_failed_rq(drive, rq);
 278
 279         if (!rq->current_nr_sectors && blk_fs_request(rq))
 280                 uptodate = 1;
 281         /* make sure it's fully ended */
 282         if (blk_pc_request(rq))
 283                 nsectors = (rq->data_len + 511) >> 9;
 284         if (!nsectors)
 285                 nsectors = 1;
 286
 287         ide_debug_log(IDE_DBG_FUNC, "uptodate: 0x%x, nsectors: %d",
 288                                     uptodate, nsectors);
 289
 290         if (blk_fs_request(rq) == 0 && uptodate <= 0 && rq->errors == 0)
 291                 rq->errors = -EIO;
 292
 293         ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
 294 }
 295
 296 /*
 297  * Returns:
 298  * 0: if the request should be continued.
 299  * 1: if the request will be going through error recovery.
 300  * 2: if the request should be ended.
 301  */
 302 static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
 303 {
 304         ide_hwif_t *hwif = drive->hwif;
 305         struct request *rq = hwif->rq;
 306         int stat, err, sense_key;
 307
 308         /* check for errors */
 309         stat = hwif->tp_ops->read_status(hwif);
 310
 311         if (stat_ret)
 312                 *stat_ret = stat;
 313
 314         if (OK_STAT(stat, good_stat, BAD_R_STAT))
 315                 return 0;
 316
 317         /* get the IDE error register */
 318         err = ide_read_error(drive);
 319         sense_key = err >> 4;
 320
 321         ide_debug_log(IDE_DBG_RQ, "stat: 0x%x, good_stat: 0x%x, cmd[0]: 0x%x, "
 322                                   "rq->cmd_type: 0x%x, err: 0x%x",
 323                                   stat, good_stat, rq->cmd[0], rq->cmd_type,
 324                                   err);
 325
 326         if (blk_sense_request(rq)) {
 327                 /*
 328                  * We got an error trying to get sense info from the drive
 329                  * (probably while trying to recover from a former error).
 330                  * Just give up.
 331                  */
 332                 rq->cmd_flags |= REQ_FAILED;
 333                 return 2;
 334         } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) {
 335                 /* All other functions, except for READ. */
 336
 337                 /*
 338                  * if we have an error, pass back CHECK_CONDITION as the
 339                  * scsi status byte
 340                  */
 341                 if (blk_pc_request(rq) && !rq->errors)
 342                         rq->errors = SAM_STAT_CHECK_CONDITION;
 343
 344                 /* check for tray open */
 345                 if (sense_key == NOT_READY) {
 346                         cdrom_saw_media_change(drive);
 347                 } else if (sense_key == UNIT_ATTENTION) {
 348                         /* check for media change */
 349                         cdrom_saw_media_change(drive);
 350                         return 0;
 351                 } else if (sense_key == ILLEGAL_REQUEST &&
 352                            rq->cmd[0] == GPCMD_START_STOP_UNIT) {
 353                         /*
 354                          * Don't print error message for this condition--
 355                          * SFF8090i indicates that 5/24/00 is the correct
 356                          * response to a request to close the tray if the
 357                          * drive doesn't have that capability.
 358                          * cdrom_log_sense() knows this!
 359                          */
 360                 } else if (!(rq->cmd_flags & REQ_QUIET)) {
 361                         /* otherwise, print an error */
 362                         ide_dump_status(drive, "packet command error", stat);
 363                 }
 364
 365                 rq->cmd_flags |= REQ_FAILED;
 366
 367                 /*
 368                  * instead of playing games with moving completions around,
 369                  * remove failed request completely and end it when the
 370                  * request sense has completed
 371                  */
 372                 goto end_request;
 373
 374         } else if (blk_fs_request(rq)) {
 375                 int do_end_request = 0;
 376
 377                 /* handle errors from READ and WRITE requests */
 378
 379                 if (blk_noretry_request(rq))
 380                         do_end_request = 1;
 381
 382                 if (sense_key == NOT_READY) {
 383                         /* tray open */
 384                         if (rq_data_dir(rq) == READ) {
 385                                 cdrom_saw_media_change(drive);
 386
 387                                 /* fail the request */
 388                                 printk(KERN_ERR PFX "%s: tray open\n",
 389                                                 drive->name);
 390                                 do_end_request = 1;
 391                         } else {
 392                                 struct cdrom_info *info = drive->driver_data;
 393
 394                                 /*
 395                                  * Allow the drive 5 seconds to recover, some
 396                                  * devices will return this error while flushing
 397                                  * data from cache.
 398                                  */
 399                                 if (!rq->errors)
 400                                         info->write_timeout = jiffies +
 401                                                         ATAPI_WAIT_WRITE_BUSY;
 402                                 rq->errors = 1;
 403                                 if (time_after(jiffies, info->write_timeout))
 404                                         do_end_request = 1;
 405                                 else {
 406                                         struct request_queue *q = drive->queue;
 407                                         unsigned long flags;
 408
 409                                         /*
 410                                          * take a breather relying on the unplug
 411                                          * timer to kick us again
 412                                          */
 413                                         spin_lock_irqsave(q->queue_lock, flags);
 414                                         blk_plug_device(q);
 415                                         spin_unlock_irqrestore(q->queue_lock, flags);
 416
 417                                         return 1;
 418                                 }
 419                         }
 420                 } else if (sense_key == UNIT_ATTENTION) {
 421                         /* media change */
 422                         cdrom_saw_media_change(drive);
 423
 424                         /*
 425                          * Arrange to retry the request but be sure to give up
 426                          * if we've retried too many times.
 427                          */
 428                         if (++rq->errors > ERROR_MAX)
 429                                 do_end_request = 1;
 430                 } else if (sense_key == ILLEGAL_REQUEST ||
 431                            sense_key == DATA_PROTECT) {
 432                         /*
 433                          * No point in retrying after an illegal request or data
 434                          * protect error.
 435                          */
 436                         ide_dump_status(drive, "command error", stat);
 437                         do_end_request = 1;
 438                 } else if (sense_key == MEDIUM_ERROR) {
 439                         /*
 440                          * No point in re-trying a zillion times on a bad
 441                          * sector. If we got here the error is not correctable.
 442                          */
 443                         ide_dump_status(drive, "media error (bad sector)",
 444                                         stat);
 445                         do_end_request = 1;
 446                 } else if (sense_key == BLANK_CHECK) {
 447                         /* disk appears blank ?? */
 448                         ide_dump_status(drive, "media error (blank)", stat);
 449                         do_end_request = 1;
 450                 } else if ((err & ~ATA_ABORTED) != 0) {
 451                         /* go to the default handler for other errors */
 452                         ide_error(drive, "cdrom_decode_status", stat);
 453                         return 1;
 454                 } else if ((++rq->errors > ERROR_MAX)) {
 455                         /* we've racked up too many retries, abort */
 456                         do_end_request = 1;
 457                 }
 458
 459                 /*
 460                  * End a request through request sense analysis when we have
 461                  * sense data. We need this in order to perform end of media
 462                  * processing.
 463                  */
 464                 if (do_end_request)
 465                         goto end_request;
 466
 467                 /*
 468                  * If we got a CHECK_CONDITION status, queue
 469                  * a request sense command.
 470                  */
 471                 if (stat & ATA_ERR)
 472                         cdrom_queue_request_sense(drive, NULL, NULL);
 473                 return 1;
 474         } else {
 475                 blk_dump_rq_flags(rq, PFX "bad rq");
 476                 return 2;
 477         }
 478
 479 end_request:
 480         if (stat & ATA_ERR) {
 481                 struct request_queue *q = drive->queue;
 482                 unsigned long flags;
 483
 484                 spin_lock_irqsave(q->queue_lock, flags);
 485                 blkdev_dequeue_request(rq);
 486                 spin_unlock_irqrestore(q->queue_lock, flags);
 487
 488                 hwif->rq = NULL;
 489
 490                 cdrom_queue_request_sense(drive, rq->sense, rq);
 491                 return 1;
 492         } else
 493                 return 2;
 494 }
 495
 496 /*
 497  * Check the contents of the interrupt reason register from the cdrom
 498  * and attempt to recover if there are problems.  Returns  0 if everything's
 499  * ok; nonzero if the request has been terminated.
 500  */
 501 static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
 502                                 int len, int ireason, int rw)
 503 {
 504         ide_hwif_t *hwif = drive->hwif;
 505
 506         ide_debug_log(IDE_DBG_FUNC, "ireason: 0x%x, rw: 0x%x", ireason, rw);
 507
 508         /*
 509          * ireason == 0: the drive wants to receive data from us
 510          * ireason == 2: the drive is expecting to transfer data to us
 511          */
 512         if (ireason == (!rw << 1))
 513                 return 0;
 514         else if (ireason == (rw << 1)) {
 515
 516                 /* whoops... */
 517                 printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n",
 518                                 drive->name, __func__);
 519
 520                 ide_pad_transfer(drive, rw, len);
 521         } else  if (rw == 0 && ireason == 1) {
 522                 /*
 523                  * Some drives (ASUS) seem to tell us that status info is
 524                  * available.  Just get it and ignore.
 525                  */
 526                 (void)hwif->tp_ops->read_status(hwif);
 527                 return 0;
 528         } else {
 529                 /* drive wants a command packet, or invalid ireason... */
 530                 printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n",
 531                                 drive->name, __func__, ireason);
 532         }
 533
 534         if (rq->cmd_type == REQ_TYPE_ATA_PC)
 535                 rq->cmd_flags |= REQ_FAILED;
 536
 537         return -1;
 538 }
 539
 540 /*
 541  * Assume that the drive will always provide data in multiples of at least
 542  * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise.
 543  */
 544 static int ide_cd_check_transfer_size(ide_drive_t *drive, int len)
 545 {
 546         ide_debug_log(IDE_DBG_FUNC, "len: %d", len);
 547
 548         if ((len % SECTOR_SIZE) == 0)
 549                 return 0;
 550
 551         printk(KERN_ERR PFX "%s: %s: Bad transfer size %d\n", drive->name,
 552                         __func__, len);
 553
 554         if (drive->atapi_flags & IDE_AFLAG_LIMIT_NFRAMES)
 555                 printk(KERN_ERR PFX "This drive is not supported by this "
 556                                 "version of the driver\n");
 557         else {
 558                 printk(KERN_ERR PFX "Trying to limit transfer sizes\n");
 559                 drive->atapi_flags |= IDE_AFLAG_LIMIT_NFRAMES;
 560         }
 561
 562         return 1;
 563 }
 564
 565 static ide_startstop_t ide_cd_prepare_rw_request(ide_drive_t *drive,
 566                                                  struct request *rq)
 567 {
 568         ide_debug_log(IDE_DBG_RQ, "rq->cmd_flags: 0x%x", rq->cmd_flags);
 569
 570         if (rq_data_dir(rq) == READ) {
 571                 unsigned short sectors_per_frame =
 572                         queue_hardsect_size(drive->queue) >> SECTOR_BITS;
 573                 int nskip = rq->sector & (sectors_per_frame - 1);
 574
 575                 /*
 576                  * If the requested sector doesn't start on a frame boundary,
 577                  * we must adjust the start of the transfer so that it does,
 578                  * and remember to skip the first few sectors.
 579                  *
 580                  * If the rq->current_nr_sectors field is larger than the size
 581                  * of the buffer, it will mean that we're to skip a number of
 582                  * sectors equal to the amount by which rq->current_nr_sectors
 583                  * is larger than the buffer size.
 584                  */
 585                 if (nskip > 0) {
 586                         /* sanity check... */
 587                         if (rq->current_nr_sectors !=
 588                             bio_cur_sectors(rq->bio)) {
 589                                 printk(KERN_ERR PFX "%s: %s: buffer botch (%u)\n",
 590                                                 drive->name, __func__,
 591                                                 rq->current_nr_sectors);
 592                                 return ide_stopped;
 593                         }
 594                         rq->current_nr_sectors += nskip;
 595                 }
 596         }
 597
 598         /* set up the command */
 599         rq->timeout = ATAPI_WAIT_PC;
 600
 601         return ide_started;
 602 }
 603
 604 /*
 605  * Fix up a possibly partially-processed request so that we can start it over
 606  * entirely, or even put it back on the request queue.
 607  */
 608 static void ide_cd_restore_request(ide_drive_t *drive, struct request *rq)
 609 {
 610
 611         ide_debug_log(IDE_DBG_FUNC, "enter");
 612
 613         if (rq->buffer != bio_data(rq->bio)) {
 614                 sector_t n =
 615                         (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE;
 616
 617                 rq->buffer = bio_data(rq->bio);
 618                 rq->nr_sectors += n;
 619                 rq->sector -= n;
 620         }
 621         rq->current_nr_sectors = bio_cur_sectors(rq->bio);
 622         rq->hard_cur_sectors = rq->current_nr_sectors;
 623         rq->hard_nr_sectors = rq->nr_sectors;
 624         rq->hard_sector = rq->sector;
 625         rq->q->prep_rq_fn(rq->q, rq);
 626 }
 627
 628 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct request *rq)
 629 {
 630         ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]);
 631
 632         /*
 633          * Some of the trailing request sense fields are optional,
 634          * and some drives don't send them.  Sigh.
 635          */
 636         if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
 637             rq->data_len > 0 && rq->data_len <= 5)
 638                 while (rq->data_len > 0) {
 639                         *(u8 *)rq->data++ = 0;
 640                         --rq->data_len;
 641                 }
 642 }
 643
 644 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
 645                     int write, void *buffer, unsigned *bufflen,
 646                     struct request_sense *sense, int timeout,
 647                     unsigned int cmd_flags)
 648 {
 649         struct cdrom_info *info = drive->driver_data;
 650         struct request_sense local_sense;
 651         int retries = 10;
 652         unsigned int flags = 0;
 653
 654         if (!sense)
 655                 sense = &local_sense;
 656
 657         ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, "
 658                                   "cmd_flags: 0x%x",
 659                                   cmd[0], write, timeout, cmd_flags);
 660
 661         /* start of retry loop */
 662         do {
 663                 struct request *rq;
 664                 int error;
 665
 666                 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
 667
 668                 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
 669                 rq->cmd_type = REQ_TYPE_ATA_PC;
 670                 rq->sense = sense;
 671                 rq->cmd_flags |= cmd_flags;
 672                 rq->timeout = timeout;
 673                 if (buffer) {
 674                         rq->data = buffer;
 675                         rq->data_len = *bufflen;
 676                 }
 677
 678                 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
 679
 680                 if (buffer)
 681                         *bufflen = rq->data_len;
 682
 683                 flags = rq->cmd_flags;
 684                 blk_put_request(rq);
 685
 686                 /*
 687                  * FIXME: we should probably abort/retry or something in case of
 688                  * failure.
 689                  */
 690                 if (flags & REQ_FAILED) {
 691                         /*
 692                          * The request failed.  Retry if it was due to a unit
 693                          * attention status (usually means media was changed).
 694                          */
 695                         struct request_sense *reqbuf = sense;
 696
 697                         if (reqbuf->sense_key == UNIT_ATTENTION)
 698                                 cdrom_saw_media_change(drive);
 699                         else if (reqbuf->sense_key == NOT_READY &&
 700                                  reqbuf->asc == 4 && reqbuf->ascq != 4) {
 701                                 /*
 702                                  * The drive is in the process of loading
 703                                  * a disk.  Retry, but wait a little to give
 704                                  * the drive time to complete the load.
 705                                  */
 706                                 ssleep(2);
 707                         } else {
 708                                 /* otherwise, don't retry */
 709                                 retries = 0;
 710                         }
 711                         --retries;
 712                 }
 713
 714                 /* end of retry loop */
 715         } while ((flags & REQ_FAILED) && retries >= 0);
 716
 717         /* return an error if the command failed */
 718         return (flags & REQ_FAILED) ? -EIO : 0;
 719 }
 720
 721 /*
 722  * Called from blk_end_request_callback() after the data of the request is
 723  * completed and before the request itself is completed. By returning value '1',
 724  * blk_end_request_callback() returns immediately without completing it.
 725  */
 726 static int cdrom_newpc_intr_dummy_cb(struct request *rq)
 727 {
 728         return 1;
 729 }
 730
 731 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 732 {
 733         ide_hwif_t *hwif = drive->hwif;
 734         struct request *rq = hwif->rq;
 735         xfer_func_t *xferfunc;
 736         ide_expiry_t *expiry = NULL;
 737         int dma_error = 0, dma, stat, thislen, uptodate = 0;
 738         int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc;
 739         int sense = blk_sense_request(rq);
 740         unsigned int timeout;
 741         u16 len;
 742         u8 ireason;
 743
 744         ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x",
 745                                   rq->cmd[0], write);
 746
 747         /* check for errors */
 748         dma = drive->dma;
 749         if (dma) {
 750                 drive->dma = 0;
 751                 dma_error = hwif->dma_ops->dma_end(drive);
 752                 if (dma_error) {
 753                         printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
 754                                         write ? "write" : "read");
 755                         ide_dma_off(drive);
 756                 }
 757         }
 758
 759         rc = cdrom_decode_status(drive, 0, &stat);
 760         if (rc) {
 761                 if (rc == 2)
 762                         goto out_end;
 763                 return ide_stopped;
 764         }
 765
 766         /* using dma, transfer is complete now */
 767         if (dma) {
 768                 if (dma_error)
 769                         return ide_error(drive, "dma error", stat);
 770                 if (blk_fs_request(rq)) {
 771                         ide_complete_rq(drive, 0, rq->nr_sectors
 772                                 ? (rq->nr_sectors << 9) : ide_rq_bytes(rq));
 773                         return ide_stopped;
 774                 } else if (rq->cmd_type == REQ_TYPE_ATA_PC && !rq->bio) {
 775                         ide_complete_rq(drive, 0, 512);
 776                         return ide_stopped;
 777                 }
 778                 if (blk_pc_request(rq) == 0 && uptodate == 0)
 779                         rq->cmd_flags |= REQ_FAILED;
 780                 goto out_end;
 781         }
 782
 783         ide_read_bcount_and_ireason(drive, &len, &ireason);
 784
 785         thislen = blk_fs_request(rq) ? len : rq->data_len;
 786         if (thislen > len)
 787                 thislen = len;
 788
 789         ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d",
 790                                   stat, thislen);
 791
 792         /* If DRQ is clear, the command has completed. */
 793         if ((stat & ATA_DRQ) == 0) {
 794                 if (blk_fs_request(rq)) {
 795                         /*
 796                          * If we're not done reading/writing, complain.
 797                          * Otherwise, complete the command normally.
 798                          */
 799                         uptodate = 1;
 800                         if (rq->current_nr_sectors > 0) {
 801                                 printk(KERN_ERR PFX "%s: %s: data underrun "
 802                                                 "(%d blocks)\n",
 803                                                 drive->name, __func__,
 804                                                 rq->current_nr_sectors);
 805                                 if (!write)
 806                                         rq->cmd_flags |= REQ_FAILED;
 807                                 uptodate = 0;
 808                         }
 809                 } else if (!blk_pc_request(rq)) {
 810                         ide_cd_request_sense_fixup(drive, rq);
 811                         /* complain if we still have data left to transfer */
 812                         uptodate = rq->data_len ? 0 : 1;
 813                         if (uptodate == 0)
 814                                 rq->cmd_flags |= REQ_FAILED;
 815                 }
 816                 goto out_end;
 817         }
 818
 819         /* check which way to transfer data */
 820         rc = ide_cd_check_ireason(drive, rq, len, ireason, write);
 821         if (rc)
 822                 goto out_end;
 823
 824         if (blk_fs_request(rq)) {
 825                 if (write == 0) {
 826                         int nskip;
 827
 828                         if (ide_cd_check_transfer_size(drive, len))
 829                                 goto out_end;
 830
 831                         /*
 832                          * First, figure out if we need to bit-bucket
 833                          * any of the leading sectors.
 834                          */
 835                         nskip = min_t(int, rq->current_nr_sectors
 836                                            - bio_cur_sectors(rq->bio),
 837                                            thislen >> 9);
 838                         if (nskip > 0) {
 839                                 ide_pad_transfer(drive, write, nskip << 9);
 840                                 rq->current_nr_sectors -= nskip;
 841                                 thislen -= (nskip << 9);
 842                         }
 843                 }
 844         }
 845
 846         if (ireason == 0) {
 847                 write = 1;
 848                 xferfunc = hwif->tp_ops->output_data;
 849         } else {
 850                 write = 0;
 851                 xferfunc = hwif->tp_ops->input_data;
 852         }
 853
 854         ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, "
 855                                   "ireason: 0x%x",
 856                                   rq->cmd_type, ireason);
 857
 858         /* transfer data */
 859         while (thislen > 0) {
 860                 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data;
 861                 int blen = rq->data_len;
 862
 863                 /* bio backed? */
 864                 if (rq->bio) {
 865                         if (blk_fs_request(rq)) {
 866                                 ptr = rq->buffer;
 867                                 blen = rq->current_nr_sectors << 9;
 868                         } else {
 869                                 ptr = bio_data(rq->bio);
 870                                 blen = bio_iovec(rq->bio)->bv_len;
 871                         }
 872                 }
 873
 874                 if (!ptr) {
 875                         if (blk_fs_request(rq) && !write)
 876                                 /*
 877                                  * If the buffers are full, pipe the rest into
 878                                  * oblivion.
 879                                  */
 880                                 ide_pad_transfer(drive, 0, thislen);
 881                         else {
 882                                 printk(KERN_ERR PFX "%s: confused, missing data\n",
 883                                                 drive->name);
 884                                 blk_dump_rq_flags(rq, rq_data_dir(rq)
 885                                                   ? "cdrom_newpc_intr, write"
 886                                                   : "cdrom_newpc_intr, read");
 887                         }
 888                         break;
 889                 }
 890
 891                 if (blen > thislen)
 892                         blen = thislen;
 893
 894                 xferfunc(drive, NULL, ptr, blen);
 895
 896                 thislen -= blen;
 897                 len -= blen;
 898
 899                 if (blk_fs_request(rq)) {
 900                         rq->buffer += blen;
 901                         rq->nr_sectors -= (blen >> 9);
 902                         rq->current_nr_sectors -= (blen >> 9);
 903                         rq->sector += (blen >> 9);
 904
 905                         if (rq->current_nr_sectors == 0 && rq->nr_sectors)
 906                                 cdrom_end_request(drive, 1);
 907                 } else {
 908                         rq->data_len -= blen;
 909
 910                         /*
 911                          * The request can't be completed until DRQ is cleared.
 912                          * So complete the data, but don't complete the request
 913                          * using the dummy function for the callback feature
 914                          * of blk_end_request_callback().
 915                          */
 916                         if (rq->bio)
 917                                 blk_end_request_callback(rq, 0, blen,
 918                                                  cdrom_newpc_intr_dummy_cb);
 919                         else
 920                                 rq->data += blen;
 921                 }
 922                 if (sense && write == 0)
 923                         rq->sense_len += blen;
 924         }
 925
 926         /* pad, if necessary */
 927         if (!blk_fs_request(rq) && len > 0)
 928                 ide_pad_transfer(drive, write, len);
 929
 930         if (blk_pc_request(rq)) {
 931                 timeout = rq->timeout;
 932         } else {
 933                 timeout = ATAPI_WAIT_PC;
 934                 if (!blk_fs_request(rq))
 935                         expiry = ide_cd_expiry;
 936         }
 937
 938         hwif->expiry = expiry;
 939         ide_set_handler(drive, cdrom_newpc_intr, timeout);
 940         return ide_started;
 941
 942 out_end:
 943         if (blk_pc_request(rq) && rc == 0) {
 944                 unsigned int dlen = rq->data_len;
 945
 946                 if (dma)
 947                         rq->data_len = 0;
 948
 949                 if (blk_end_request(rq, 0, dlen))
 950                         BUG();
 951
 952                 hwif->rq = NULL;
 953         } else {
 954                 cdrom_end_request(drive, uptodate);
 955                 if (sense && rc == 2)
 956                         ide_error(drive, "request sense failure", stat);
 957         }
 958         return ide_stopped;
 959 }
 960
 961 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
 962 {
 963         struct cdrom_info *cd = drive->driver_data;
 964         int write = rq_data_dir(rq) == WRITE;
 965         unsigned short sectors_per_frame =
 966                 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
 967
 968         ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, write: 0x%x, "
 969                                   "secs_per_frame: %u",
 970                                   rq->cmd[0], write, sectors_per_frame);
 971
 972         if (write) {
 973                 /* disk has become write protected */
 974                 if (get_disk_ro(cd->disk))
 975                         return ide_stopped;
 976         } else {
 977                 /*
 978                  * We may be retrying this request after an error.  Fix up any
 979                  * weirdness which might be present in the request packet.
 980                  */
 981                 ide_cd_restore_request(drive, rq);
 982         }
 983
 984         /* use DMA, if possible / writes *must* be hardware frame aligned */
 985         if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
 986             (rq->sector & (sectors_per_frame - 1))) {
 987                 if (write)
 988                         return ide_stopped;
 989                 drive->dma = 0;
 990         } else
 991                 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
 992
 993         if (write)
 994                 cd->devinfo.media_written = 1;
 995
 996         return ide_started;
 997 }
 998
 999 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
1000 {
1001
1002         ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
1003                                   rq->cmd[0], rq->cmd_type);
1004
1005         if (blk_pc_request(rq))
1006                 rq->cmd_flags |= REQ_QUIET;
1007         else
1008                 rq->cmd_flags &= ~REQ_FAILED;
1009
1010         drive->dma = 0;
1011
1012         /* sg request */
1013         if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) {
1014                 struct request_queue *q = drive->queue;
1015                 unsigned int alignment;
1016                 char *buf;
1017
1018                 if (rq->bio)
1019                         buf = bio_data(rq->bio);
1020                 else
1021                         buf = rq->data;
1022
1023                 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1024
1025                 /*
1026                  * check if dma is safe
1027                  *
1028                  * NOTE! The "len" and "addr" checks should possibly have
1029                  * separate masks.
1030                  */
1031                 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
1032                 if ((unsigned long)buf & alignment
1033                     || rq->data_len & q->dma_pad_mask
1034                     || object_is_on_stack(buf))
1035                         drive->dma = 0;
1036         }
1037 }
1038
1039 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
1040                                         sector_t block)
1041 {
1042         struct ide_cmd cmd;
1043         int uptodate = 0;
1044
1045         ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
1046                                   rq->cmd[0], (unsigned long long)block);
1047
1048         if (drive->debug_mask & IDE_DBG_RQ)
1049                 blk_dump_rq_flags(rq, "ide_cd_do_request");
1050
1051         if (blk_fs_request(rq)) {
1052                 if (cdrom_start_rw(drive, rq) == ide_stopped ||
1053                     ide_cd_prepare_rw_request(drive, rq) == ide_stopped)
1054                         goto out_end;
1055         } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
1056                    rq->cmd_type == REQ_TYPE_ATA_PC) {
1057                 if (!rq->timeout)
1058                         rq->timeout = ATAPI_WAIT_PC;
1059
1060                 cdrom_do_block_pc(drive, rq);
1061         } else if (blk_special_request(rq)) {
1062                 /* right now this can only be a reset... */
1063                 uptodate = 1;
1064                 goto out_end;
1065         } else {
1066                 blk_dump_rq_flags(rq, DRV_NAME " bad flags");
1067                 goto out_end;
1068         }
1069
1070         memset(&cmd, 0, sizeof(cmd));
1071
1072         if (rq_data_dir(rq))
1073                 cmd.tf_flags |= IDE_TFLAG_WRITE;
1074
1075         cmd.rq = rq;
1076
1077         return ide_issue_pc(drive, &cmd);
1078 out_end:
1079         cdrom_end_request(drive, uptodate);
1080         return ide_stopped;
1081 }
1082
1083 /*
1084  * Ioctl handling.
1085  *
1086  * Routines which queue packet commands take as a final argument a pointer to a
1087  * request_sense struct. If execution of the command results in an error with a
1088  * CHECK CONDITION status, this structure will be filled with the results of the
1089  * subsequent request sense command. The pointer can also be NULL, in which case
1090  * no sense information is returned.
1091  */
1092 static void msf_from_bcd(struct atapi_msf *msf)
1093 {
1094         msf->minute = bcd2bin(msf->minute);
1095         msf->second = bcd2bin(msf->second);
1096         msf->frame  = bcd2bin(msf->frame);
1097 }
1098
1099 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
1100 {
1101         struct cdrom_info *info = drive->driver_data;
1102         struct cdrom_device_info *cdi = &info->devinfo;
1103         unsigned char cmd[BLK_MAX_CDB];
1104
1105         ide_debug_log(IDE_DBG_FUNC, "enter");
1106
1107         memset(cmd, 0, BLK_MAX_CDB);
1108         cmd[0] = GPCMD_TEST_UNIT_READY;
1109
1110         /*
1111          * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
1112          * instead of supporting the LOAD_UNLOAD opcode.
1113          */
1114         cmd[7] = cdi->sanyo_slot % 3;
1115
1116         return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
1117 }
1118
1119 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
1120                                unsigned long *sectors_per_frame,
1121                                struct request_sense *sense)
1122 {
1123         struct {
1124                 __be32 lba;
1125                 __be32 blocklen;
1126         } capbuf;
1127
1128         int stat;
1129         unsigned char cmd[BLK_MAX_CDB];
1130         unsigned len = sizeof(capbuf);
1131         u32 blocklen;
1132
1133         ide_debug_log(IDE_DBG_FUNC, "enter");
1134
1135         memset(cmd, 0, BLK_MAX_CDB);
1136         cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1137
1138         stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
1139                                REQ_QUIET);
1140         if (stat)
1141                 return stat;
1142
1143         /*
1144          * Sanity check the given block size
1145          */
1146         blocklen = be32_to_cpu(capbuf.blocklen);
1147         switch (blocklen) {
1148         case 512:
1149         case 1024:
1150         case 2048:
1151         case 4096:
1152                 break;
1153         default:
1154                 printk(KERN_ERR PFX "%s: weird block size %u\n",
1155                                 drive->name, blocklen);
1156                 printk(KERN_ERR PFX "%s: default to 2kb block size\n",
1157                                 drive->name);
1158                 blocklen = 2048;
1159                 break;
1160         }
1161
1162         *capacity = 1 + be32_to_cpu(capbuf.lba);
1163         *sectors_per_frame = blocklen >> SECTOR_BITS;
1164
1165         ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu",
1166                                      *capacity, *sectors_per_frame);
1167
1168         return 0;
1169 }
1170
1171 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1172                                 int format, char *buf, int buflen,
1173                                 struct request_sense *sense)
1174 {
1175         unsigned char cmd[BLK_MAX_CDB];
1176
1177         ide_debug_log(IDE_DBG_FUNC, "enter");
1178
1179         memset(cmd, 0, BLK_MAX_CDB);
1180
1181         cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1182         cmd[6] = trackno;
1183         cmd[7] = (buflen >> 8);
1184         cmd[8] = (buflen & 0xff);
1185         cmd[9] = (format << 6);
1186
1187         if (msf_flag)
1188                 cmd[1] = 2;
1189
1190         return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
1191 }
1192
1193 /* Try to read the entire TOC for the disk into our internal buffer. */
1194 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1195 {
1196         int stat, ntracks, i;
1197         struct cdrom_info *info = drive->driver_data;
1198         struct cdrom_device_info *cdi = &info->devinfo;
1199         struct atapi_toc *toc = info->toc;
1200         struct {
1201                 struct atapi_toc_header hdr;
1202                 struct atapi_toc_entry  ent;
1203         } ms_tmp;
1204         long last_written;
1205         unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1206
1207         ide_debug_log(IDE_DBG_FUNC, "enter");
1208
1209         if (toc == NULL) {
1210                 /* try to allocate space */
1211                 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1212                 if (toc == NULL) {
1213                         printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
1214                                         drive->name);
1215                         return -ENOMEM;
1216                 }
1217                 info->toc = toc;
1218         }
1219
1220         /*
1221          * Check to see if the existing data is still valid. If it is,
1222          * just return.
1223          */
1224         (void) cdrom_check_status(drive, sense);
1225
1226         if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
1227                 return 0;
1228
1229         /* try to get the total cdrom capacity and sector size */
1230         stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1231                                    sense);
1232         if (stat)
1233                 toc->capacity = 0x1fffff;
1234
1235         set_capacity(info->disk, toc->capacity * sectors_per_frame);
1236         /* save a private copy of the TOC capacity for error handling */
1237         drive->probed_capacity = toc->capacity * sectors_per_frame;
1238
1239         blk_queue_hardsect_size(drive->queue,
1240                                 sectors_per_frame << SECTOR_BITS);
1241
1242         /* first read just the header, so we know how long the TOC is */
1243         stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1244                                     sizeof(struct atapi_toc_header), sense);
1245         if (stat)
1246                 return stat;
1247
1248         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1249                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1250                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1251         }
1252
1253         ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1254         if (ntracks <= 0)
1255                 return -EIO;
1256         if (ntracks > MAX_TRACKS)
1257                 ntracks = MAX_TRACKS;
1258
1259         /* now read the whole schmeer */
1260         stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1261                                   (char *)&toc->hdr,
1262                                    sizeof(struct atapi_toc_header) +
1263                                    (ntracks + 1) *
1264                                    sizeof(struct atapi_toc_entry), sense);
1265
1266         if (stat && toc->hdr.first_track > 1) {
1267                 /*
1268                  * Cds with CDI tracks only don't have any TOC entries, despite
1269                  * of this the returned values are
1270                  * first_track == last_track = number of CDI tracks + 1,
1271                  * so that this case is indistinguishable from the same layout
1272                  * plus an additional audio track. If we get an error for the
1273                  * regular case, we assume a CDI without additional audio
1274                  * tracks. In this case the readable TOC is empty (CDI tracks
1275                  * are not included) and only holds the Leadout entry.
1276                  *
1277                  * Heiko Eißfeldt.
1278                  */
1279                 ntracks = 0;
1280                 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1281                                            (char *)&toc->hdr,
1282                                            sizeof(struct atapi_toc_header) +
1283                                            (ntracks + 1) *
1284                                            sizeof(struct atapi_toc_entry),
1285                                            sense);
1286                 if (stat)
1287                         return stat;
1288
1289                 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1290                         toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1291                         toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1292                 } else {
1293                         toc->hdr.first_track = CDROM_LEADOUT;
1294                         toc->hdr.last_track = CDROM_LEADOUT;
1295                 }
1296         }
1297
1298         if (stat)
1299                 return stat;
1300
1301         toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1302
1303         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1304                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1305                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1306         }
1307
1308         for (i = 0; i <= ntracks; i++) {
1309                 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1310                         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1311                                 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1312                         msf_from_bcd(&toc->ent[i].addr.msf);
1313                 }
1314                 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1315                                                   toc->ent[i].addr.msf.second,
1316                                                   toc->ent[i].addr.msf.frame);
1317         }
1318
1319         if (toc->hdr.first_track != CDROM_LEADOUT) {
1320                 /* read the multisession information */
1321                 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1322                                            sizeof(ms_tmp), sense);
1323                 if (stat)
1324                         return stat;
1325
1326                 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1327         } else {
1328                 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1329                 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1330                 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1331         }
1332
1333         if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1334                 /* re-read multisession information using MSF format */
1335                 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1336                                            sizeof(ms_tmp), sense);
1337                 if (stat)
1338                         return stat;
1339
1340                 msf_from_bcd(&ms_tmp.ent.addr.msf);
1341                 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1342                                                    ms_tmp.ent.addr.msf.second,
1343                                                    ms_tmp.ent.addr.msf.frame);
1344         }
1345
1346         toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1347
1348         /* now try to get the total cdrom capacity */
1349         stat = cdrom_get_last_written(cdi, &last_written);
1350         if (!stat && (last_written > toc->capacity)) {
1351                 toc->capacity = last_written;
1352                 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1353                 drive->probed_capacity = toc->capacity * sectors_per_frame;
1354         }
1355
1356         /* Remember that we've read this stuff. */
1357         drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1358
1359         return 0;
1360 }
1361
1362 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1363 {
1364         struct cdrom_info *info = drive->driver_data;
1365         struct cdrom_device_info *cdi = &info->devinfo;
1366         struct packet_command cgc;
1367         int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1368
1369         ide_debug_log(IDE_DBG_FUNC, "enter");
1370
1371         if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1372                 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1373
1374         init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1375         do {
1376                 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1377                 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1378                 if (!stat)
1379                         break;
1380         } while (--attempts);
1381         return stat;
1382 }
1383
1384 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1385 {
1386         struct cdrom_info *cd = drive->driver_data;
1387         u16 curspeed, maxspeed;
1388
1389         ide_debug_log(IDE_DBG_FUNC, "enter");
1390
1391         if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1392                 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1393                 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1394         } else {
1395                 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1396                 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1397         }
1398
1399         ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u",
1400                                      curspeed, maxspeed);
1401
1402         cd->current_speed = (curspeed + (176/2)) / 176;
1403         cd->max_speed = (maxspeed + (176/2)) / 176;
1404 }
1405
1406 #define IDE_CD_CAPABILITIES \
1407         (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1408          CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1409          CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1410          CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1411          CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1412
1413 static struct cdrom_device_ops ide_cdrom_dops = {
1414         .open                   = ide_cdrom_open_real,
1415         .release                = ide_cdrom_release_real,
1416         .drive_status           = ide_cdrom_drive_status,
1417         .media_changed          = ide_cdrom_check_media_change_real,
1418         .tray_move              = ide_cdrom_tray_move,
1419         .lock_door              = ide_cdrom_lock_door,
1420         .select_speed           = ide_cdrom_select_speed,
1421         .get_last_session       = ide_cdrom_get_last_session,
1422         .get_mcn                = ide_cdrom_get_mcn,
1423         .reset                  = ide_cdrom_reset,
1424         .audio_ioctl            = ide_cdrom_audio_ioctl,
1425         .capability             = IDE_CD_CAPABILITIES,
1426         .generic_packet         = ide_cdrom_packet,
1427 };
1428
1429 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1430 {
1431         struct cdrom_info *info = drive->driver_data;
1432         struct cdrom_device_info *devinfo = &info->devinfo;
1433
1434         ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots);
1435
1436         devinfo->ops = &ide_cdrom_dops;
1437         devinfo->speed = info->current_speed;
1438         devinfo->capacity = nslots;
1439         devinfo->handle = drive;
1440         strcpy(devinfo->name, drive->name);
1441
1442         if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1443                 devinfo->mask |= CDC_SELECT_SPEED;
1444
1445         devinfo->disk = info->disk;
1446         return register_cdrom(devinfo);
1447 }
1448
1449 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1450 {
1451         struct cdrom_info *cd = drive->driver_data;
1452         struct cdrom_device_info *cdi = &cd->devinfo;
1453         u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1454         mechtype_t mechtype;
1455         int nslots = 1;
1456
1457         ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx",
1458                                      drive->media, drive->atapi_flags);
1459
1460         cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1461                      CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1462                      CDC_MO_DRIVE | CDC_RAM);
1463
1464         if (drive->media == ide_optical) {
1465                 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1466                 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1467                                 drive->name);
1468                 return nslots;
1469         }
1470
1471         if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1472                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1473                 cdi->mask &= ~CDC_PLAY_AUDIO;
1474                 return nslots;
1475         }
1476
1477         /*
1478          * We have to cheat a little here. the packet will eventually be queued
1479          * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1480          * Since this device hasn't been registered with the Uniform layer yet,
1481          * it can't do this. Same goes for cdi->ops.
1482          */
1483         cdi->handle = drive;
1484         cdi->ops = &ide_cdrom_dops;
1485
1486         if (ide_cdrom_get_capabilities(drive, buf))
1487                 return 0;
1488
1489         if ((buf[8 + 6] & 0x01) == 0)
1490                 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1491         if (buf[8 + 6] & 0x08)
1492                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1493         if (buf[8 + 3] & 0x01)
1494                 cdi->mask &= ~CDC_CD_R;
1495         if (buf[8 + 3] & 0x02)
1496                 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1497         if (buf[8 + 2] & 0x38)
1498                 cdi->mask &= ~CDC_DVD;
1499         if (buf[8 + 3] & 0x20)
1500                 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1501         if (buf[8 + 3] & 0x10)
1502                 cdi->mask &= ~CDC_DVD_R;
1503         if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1504                 cdi->mask &= ~CDC_PLAY_AUDIO;
1505
1506         mechtype = buf[8 + 6] >> 5;
1507         if (mechtype == mechtype_caddy ||
1508             mechtype == mechtype_popup ||
1509             (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1510                 cdi->mask |= CDC_CLOSE_TRAY;
1511
1512         if (cdi->sanyo_slot > 0) {
1513                 cdi->mask &= ~CDC_SELECT_DISC;
1514                 nslots = 3;
1515         } else if (mechtype == mechtype_individual_changer ||
1516                    mechtype == mechtype_cartridge_changer) {
1517                 nslots = cdrom_number_of_slots(cdi);
1518                 if (nslots > 1)
1519                         cdi->mask &= ~CDC_SELECT_DISC;
1520         }
1521
1522         ide_cdrom_update_speed(drive, buf);
1523
1524         printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1525
1526         /* don't print speed if the drive reported 0 */
1527         if (cd->max_speed)
1528                 printk(KERN_CONT " %dX", cd->max_speed);
1529
1530         printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1531
1532         if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1533                 printk(KERN_CONT " DVD%s%s",
1534                                  (cdi->mask & CDC_DVD_R) ? "" : "-R",
1535                                  (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1536
1537         if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1538                 printk(KERN_CONT " CD%s%s",
1539                                  (cdi->mask & CDC_CD_R) ? "" : "-R",
1540                                  (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1541
1542         if ((cdi->mask & CDC_SELECT_DISC) == 0)
1543                 printk(KERN_CONT " changer w/%d slots", nslots);
1544         else
1545                 printk(KERN_CONT " drive");
1546
1547         printk(KERN_CONT ", %dkB Cache\n",
1548                          be16_to_cpup((__be16 *)&buf[8 + 12]));
1549
1550         return nslots;
1551 }
1552
1553 /* standard prep_rq_fn that builds 10 byte cmds */
1554 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1555 {
1556         int hard_sect = queue_hardsect_size(q);
1557         long block = (long)rq->hard_sector / (hard_sect >> 9);
1558         unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1559
1560         memset(rq->cmd, 0, BLK_MAX_CDB);
1561
1562         if (rq_data_dir(rq) == READ)
1563                 rq->cmd[0] = GPCMD_READ_10;
1564         else
1565                 rq->cmd[0] = GPCMD_WRITE_10;
1566
1567         /*
1568          * fill in lba
1569          */
1570         rq->cmd[2] = (block >> 24) & 0xff;
1571         rq->cmd[3] = (block >> 16) & 0xff;
1572         rq->cmd[4] = (block >>  8) & 0xff;
1573         rq->cmd[5] = block & 0xff;
1574
1575         /*
1576          * and transfer length
1577          */
1578         rq->cmd[7] = (blocks >> 8) & 0xff;
1579         rq->cmd[8] = blocks & 0xff;
1580         rq->cmd_len = 10;
1581         return BLKPREP_OK;
1582 }
1583
1584 /*
1585  * Most of the SCSI commands are supported directly by ATAPI devices.
1586  * This transform handles the few exceptions.
1587  */
1588 static int ide_cdrom_prep_pc(struct request *rq)
1589 {
1590         u8 *c = rq->cmd;
1591
1592         /* transform 6-byte read/write commands to the 10-byte version */
1593         if (c[0] == READ_6 || c[0] == WRITE_6) {
1594                 c[8] = c[4];
1595                 c[5] = c[3];
1596                 c[4] = c[2];
1597                 c[3] = c[1] & 0x1f;
1598                 c[2] = 0;
1599                 c[1] &= 0xe0;
1600                 c[0] += (READ_10 - READ_6);
1601                 rq->cmd_len = 10;
1602                 return BLKPREP_OK;
1603         }
1604
1605         /*
1606          * it's silly to pretend we understand 6-byte sense commands, just
1607          * reject with ILLEGAL_REQUEST and the caller should take the
1608          * appropriate action
1609          */
1610         if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1611                 rq->errors = ILLEGAL_REQUEST;
1612                 return BLKPREP_KILL;
1613         }
1614
1615         return BLKPREP_OK;
1616 }
1617
1618 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1619 {
1620         if (blk_fs_request(rq))
1621                 return ide_cdrom_prep_fs(q, rq);
1622         else if (blk_pc_request(rq))
1623                 return ide_cdrom_prep_pc(rq);
1624
1625         return 0;
1626 }
1627
1628 struct cd_list_entry {
1629         const char      *id_model;
1630         const char      *id_firmware;
1631         unsigned int    cd_flags;
1632 };
1633
1634 #ifdef CONFIG_IDE_PROC_FS
1635 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1636 {
1637         unsigned long capacity, sectors_per_frame;
1638
1639         if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1640                 return 0;
1641
1642         return capacity * sectors_per_frame;
1643 }
1644
1645 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1646                                         int count, int *eof, void *data)
1647 {
1648         ide_drive_t *drive = data;
1649         int len;
1650
1651         len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1652         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1653 }
1654
1655 static ide_proc_entry_t idecd_proc[] = {
1656         { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1657         { NULL, 0, NULL, NULL }
1658 };
1659
1660 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1661 {
1662         return idecd_proc;
1663 }
1664
1665 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1666 {
1667         return NULL;
1668 }
1669 #endif
1670
1671 static const struct cd_list_entry ide_cd_quirks_list[] = {
1672         /* Limit transfer size per interrupt. */
1673         { "SAMSUNG CD-ROM SCR-2430", NULL,   IDE_AFLAG_LIMIT_NFRAMES         },
1674         { "SAMSUNG CD-ROM SCR-2432", NULL,   IDE_AFLAG_LIMIT_NFRAMES         },
1675         /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1676         { "SAMSUNG CD-ROM SCR-3231", NULL,   IDE_AFLAG_NO_SPEED_SELECT       },
1677         /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1678         { "NEC CD-ROM DRIVE:260",    "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1679                                              IDE_AFLAG_PRE_ATAPI12,          },
1680         /* Vertos 300, some versions of this drive like to talk BCD. */
1681         { "V003S0DS",                NULL,   IDE_AFLAG_VERTOS_300_SSD,       },
1682         /* Vertos 600 ESD. */
1683         { "V006E0DS",                NULL,   IDE_AFLAG_VERTOS_600_ESD,       },
1684         /*
1685          * Sanyo 3 CD changer uses a non-standard command for CD changing
1686          * (by default standard ATAPI support for CD changers is used).
1687          */
1688         { "CD-ROM CDR-C3 G",         NULL,   IDE_AFLAG_SANYO_3CD             },
1689         { "CD-ROM CDR-C3G",          NULL,   IDE_AFLAG_SANYO_3CD             },
1690         { "CD-ROM CDR_C36",          NULL,   IDE_AFLAG_SANYO_3CD             },
1691         /* Stingray 8X CD-ROM. */
1692         { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1693         /*
1694          * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1695          * mode sense page capabilities size, but older drives break.
1696          */
1697         { "ATAPI CD ROM DRIVE 50X MAX", NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1698         { "WPI CDS-32X",                NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1699         /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1700         { "",                        "241N", IDE_AFLAG_LE_SPEED_FIELDS       },
1701         /*
1702          * Some drives used by Apple don't advertise audio play
1703          * but they do support reading TOC & audio datas.
1704          */
1705         { "MATSHITADVD-ROM SR-8187", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1706         { "MATSHITADVD-ROM SR-8186", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1707         { "MATSHITADVD-ROM SR-8176", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1708         { "MATSHITADVD-ROM SR-8174", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1709         { "Optiarc DVD RW AD-5200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1710         { "Optiarc DVD RW AD-7200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1711         { "Optiarc DVD RW AD-7543A", NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1712         { "TEAC CD-ROM CD-224E",     NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1713         { NULL, NULL, 0 }
1714 };
1715
1716 static unsigned int ide_cd_flags(u16 *id)
1717 {
1718         const struct cd_list_entry *cle = ide_cd_quirks_list;
1719
1720         while (cle->id_model) {
1721                 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1722                     (cle->id_firmware == NULL ||
1723                      strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1724                         return cle->cd_flags;
1725                 cle++;
1726         }
1727
1728         return 0;
1729 }
1730
1731 static int ide_cdrom_setup(ide_drive_t *drive)
1732 {
1733         struct cdrom_info *cd = drive->driver_data;
1734         struct cdrom_device_info *cdi = &cd->devinfo;
1735         u16 *id = drive->id;
1736         char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1737         int nslots;
1738
1739         ide_debug_log(IDE_DBG_PROBE, "enter");
1740
1741         blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
1742         blk_queue_dma_alignment(drive->queue, 31);
1743         blk_queue_update_dma_pad(drive->queue, 15);
1744         drive->queue->unplug_delay = (1 * HZ) / 1000;
1745         if (!drive->queue->unplug_delay)
1746                 drive->queue->unplug_delay = 1;
1747
1748         drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1749         drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1750
1751         if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1752             fw_rev[4] == '1' && fw_rev[6] <= '2')
1753                 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1754                                      IDE_AFLAG_TOCADDR_AS_BCD);
1755         else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1756                  fw_rev[4] == '1' && fw_rev[6] <= '2')
1757                 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1758         else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1759                 /* 3 => use CD in slot 0 */
1760                 cdi->sanyo_slot = 3;
1761
1762         nslots = ide_cdrom_probe_capabilities(drive);
1763
1764         /* set correct block size */
1765         blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
1766
1767         if (ide_cdrom_register(drive, nslots)) {
1768                 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1769                                 " cdrom driver.\n", drive->name, __func__);
1770                 cd->devinfo.handle = NULL;
1771                 return 1;
1772         }
1773
1774         ide_proc_register_driver(drive, cd->driver);
1775         return 0;
1776 }
1777
1778 static void ide_cd_remove(ide_drive_t *drive)
1779 {
1780         struct cdrom_info *info = drive->driver_data;
1781
1782         ide_debug_log(IDE_DBG_FUNC, "enter");
1783
1784         ide_proc_unregister_driver(drive, info->driver);
1785         device_del(&info->dev);
1786         del_gendisk(info->disk);
1787
1788         mutex_lock(&idecd_ref_mutex);
1789         put_device(&info->dev);
1790         mutex_unlock(&idecd_ref_mutex);
1791 }
1792
1793 static void ide_cd_release(struct device *dev)
1794 {
1795         struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
1796         struct cdrom_device_info *devinfo = &info->devinfo;
1797         ide_drive_t *drive = info->drive;
1798         struct gendisk *g = info->disk;
1799
1800         ide_debug_log(IDE_DBG_FUNC, "enter");
1801
1802         kfree(info->toc);
1803         if (devinfo->handle == drive)
1804                 unregister_cdrom(devinfo);
1805         drive->driver_data = NULL;
1806         blk_queue_prep_rq(drive->queue, NULL);
1807         g->private_data = NULL;
1808         put_disk(g);
1809         kfree(info);
1810 }
1811
1812 static int ide_cd_probe(ide_drive_t *);
1813
1814 static struct ide_driver ide_cdrom_driver = {
1815         .gen_driver = {
1816                 .owner          = THIS_MODULE,
1817                 .name           = "ide-cdrom",
1818                 .bus            = &ide_bus_type,
1819         },
1820         .probe                  = ide_cd_probe,
1821         .remove                 = ide_cd_remove,
1822         .version                = IDECD_VERSION,
1823         .do_request             = ide_cd_do_request,
1824 #ifdef CONFIG_IDE_PROC_FS
1825         .proc_entries           = ide_cd_proc_entries,
1826         .proc_devsets           = ide_cd_proc_devsets,
1827 #endif
1828 };
1829
1830 static int idecd_open(struct block_device *bdev, fmode_t mode)
1831 {
1832         struct cdrom_info *info = ide_cd_get(bdev->bd_disk);
1833         int rc = -ENOMEM;
1834
1835         if (!info)
1836                 return -ENXIO;
1837
1838         rc = cdrom_open(&info->devinfo, bdev, mode);
1839
1840         if (rc < 0)
1841                 ide_cd_put(info);
1842
1843         return rc;
1844 }
1845
1846 static int idecd_release(struct gendisk *disk, fmode_t mode)
1847 {
1848         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1849
1850         cdrom_release(&info->devinfo, mode);
1851
1852         ide_cd_put(info);
1853
1854         return 0;
1855 }
1856
1857 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1858 {
1859         struct packet_command cgc;
1860         char buffer[16];
1861         int stat;
1862         char spindown;
1863
1864         if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1865                 return -EFAULT;
1866
1867         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1868
1869         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1870         if (stat)
1871                 return stat;
1872
1873         buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1874         return cdrom_mode_select(cdi, &cgc);
1875 }
1876
1877 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1878 {
1879         struct packet_command cgc;
1880         char buffer[16];
1881         int stat;
1882         char spindown;
1883
1884         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1885
1886         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1887         if (stat)
1888                 return stat;
1889
1890         spindown = buffer[11] & 0x0f;
1891         if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1892                 return -EFAULT;
1893         return 0;
1894 }
1895
1896 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1897                         unsigned int cmd, unsigned long arg)
1898 {
1899         struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1900         int err;
1901
1902         switch (cmd) {
1903         case CDROMSETSPINDOWN:
1904                 return idecd_set_spindown(&info->devinfo, arg);
1905         case CDROMGETSPINDOWN:
1906                 return idecd_get_spindown(&info->devinfo, arg);
1907         default:
1908                 break;
1909         }
1910
1911         err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1912         if (err == -EINVAL)
1913                 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
1914
1915         return err;
1916 }
1917
1918 static int idecd_media_changed(struct gendisk *disk)
1919 {
1920         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1921         return cdrom_media_changed(&info->devinfo);
1922 }
1923
1924 static int idecd_revalidate_disk(struct gendisk *disk)
1925 {
1926         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1927         struct request_sense sense;
1928
1929         ide_cd_read_toc(info->drive, &sense);
1930
1931         return  0;
1932 }
1933
1934 static struct block_device_operations idecd_ops = {
1935         .owner                  = THIS_MODULE,
1936         .open                   = idecd_open,
1937         .release                = idecd_release,
1938         .locked_ioctl           = idecd_ioctl,
1939         .media_changed          = idecd_media_changed,
1940         .revalidate_disk        = idecd_revalidate_disk
1941 };
1942
1943 /* module options */
1944 static unsigned long debug_mask;
1945 module_param(debug_mask, ulong, 0644);
1946
1947 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1948
1949 static int ide_cd_probe(ide_drive_t *drive)
1950 {
1951         struct cdrom_info *info;
1952         struct gendisk *g;
1953         struct request_sense sense;
1954
1955         ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x",
1956                                      drive->driver_req, drive->media);
1957
1958         if (!strstr("ide-cdrom", drive->driver_req))
1959                 goto failed;
1960
1961         if (drive->media != ide_cdrom && drive->media != ide_optical)
1962                 goto failed;
1963
1964         drive->debug_mask = debug_mask;
1965         drive->irq_handler = cdrom_newpc_intr;
1966
1967         info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
1968         if (info == NULL) {
1969                 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
1970                                 drive->name);
1971                 goto failed;
1972         }
1973
1974         g = alloc_disk(1 << PARTN_BITS);
1975         if (!g)
1976                 goto out_free_cd;
1977
1978         ide_init_disk(g, drive);
1979
1980         info->dev.parent = &drive->gendev;
1981         info->dev.release = ide_cd_release;
1982         dev_set_name(&info->dev, dev_name(&drive->gendev));
1983
1984         if (device_register(&info->dev))
1985                 goto out_free_disk;
1986
1987         info->drive = drive;
1988         info->driver = &ide_cdrom_driver;
1989         info->disk = g;
1990
1991         g->private_data = &info->driver;
1992
1993         drive->driver_data = info;
1994
1995         g->minors = 1;
1996         g->driverfs_dev = &drive->gendev;
1997         g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
1998         if (ide_cdrom_setup(drive)) {
1999                 put_device(&info->dev);
2000                 goto failed;
2001         }
2002
2003         ide_cd_read_toc(drive, &sense);
2004         g->fops = &idecd_ops;
2005         g->flags |= GENHD_FL_REMOVABLE;
2006         add_disk(g);
2007         return 0;
2008
2009 out_free_disk:
2010         put_disk(g);
2011 out_free_cd:
2012         kfree(info);
2013 failed:
2014         return -ENODEV;
2015 }
2016
2017 static void __exit ide_cdrom_exit(void)
2018 {
2019         driver_unregister(&ide_cdrom_driver.gen_driver);
2020 }
2021
2022 static int __init ide_cdrom_init(void)
2023 {
2024         printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
2025         return driver_register(&ide_cdrom_driver.gen_driver);
2026 }
2027
2028 MODULE_ALIAS("ide:*m-cdrom*");
2029 MODULE_ALIAS("ide-cd");
2030 module_init(ide_cdrom_init);
2031 module_exit(ide_cdrom_exit);
2032 MODULE_LICENSE("GPL");