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   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 was ended.
 300  */
 301 static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
 302 {
 303         ide_hwif_t *hwif = drive->hwif;
 304         struct request *rq = hwif->rq;
 305         int stat, err, sense_key;
 306
 307         /* check for errors */
 308         stat = hwif->tp_ops->read_status(hwif);
 309
 310         if (stat_ret)
 311                 *stat_ret = stat;
 312
 313         if (OK_STAT(stat, good_stat, BAD_R_STAT))
 314                 return 0;
 315
 316         /* get the IDE error register */
 317         err = ide_read_error(drive);
 318         sense_key = err >> 4;
 319
 320         ide_debug_log(IDE_DBG_RQ, "stat: 0x%x, good_stat: 0x%x, cmd[0]: 0x%x, "
 321                                   "rq->cmd_type: 0x%x, err: 0x%x",
 322                                   stat, good_stat, rq->cmd[0], rq->cmd_type,
 323                                   err);
 324
 325         if (blk_sense_request(rq)) {
 326                 /*
 327                  * We got an error trying to get sense info from the drive
 328                  * (probably while trying to recover from a former error).
 329                  * Just give up.
 330                  */
 331                 rq->cmd_flags |= REQ_FAILED;
 332                 cdrom_end_request(drive, 0);
 333                 ide_error(drive, "request sense failure", stat);
 334                 return 1;
 335
 336         } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) {
 337                 /* All other functions, except for READ. */
 338
 339                 /*
 340                  * if we have an error, pass back CHECK_CONDITION as the
 341                  * scsi status byte
 342                  */
 343                 if (blk_pc_request(rq) && !rq->errors)
 344                         rq->errors = SAM_STAT_CHECK_CONDITION;
 345
 346                 /* check for tray open */
 347                 if (sense_key == NOT_READY) {
 348                         cdrom_saw_media_change(drive);
 349                 } else if (sense_key == UNIT_ATTENTION) {
 350                         /* check for media change */
 351                         cdrom_saw_media_change(drive);
 352                         return 0;
 353                 } else if (sense_key == ILLEGAL_REQUEST &&
 354                            rq->cmd[0] == GPCMD_START_STOP_UNIT) {
 355                         /*
 356                          * Don't print error message for this condition--
 357                          * SFF8090i indicates that 5/24/00 is the correct
 358                          * response to a request to close the tray if the
 359                          * drive doesn't have that capability.
 360                          * cdrom_log_sense() knows this!
 361                          */
 362                 } else if (!(rq->cmd_flags & REQ_QUIET)) {
 363                         /* otherwise, print an error */
 364                         ide_dump_status(drive, "packet command error", stat);
 365                 }
 366
 367                 rq->cmd_flags |= REQ_FAILED;
 368
 369                 /*
 370                  * instead of playing games with moving completions around,
 371                  * remove failed request completely and end it when the
 372                  * request sense has completed
 373                  */
 374                 goto end_request;
 375
 376         } else if (blk_fs_request(rq)) {
 377                 int do_end_request = 0;
 378
 379                 /* handle errors from READ and WRITE requests */
 380
 381                 if (blk_noretry_request(rq))
 382                         do_end_request = 1;
 383
 384                 if (sense_key == NOT_READY) {
 385                         /* tray open */
 386                         if (rq_data_dir(rq) == READ) {
 387                                 cdrom_saw_media_change(drive);
 388
 389                                 /* fail the request */
 390                                 printk(KERN_ERR PFX "%s: tray open\n",
 391                                                 drive->name);
 392                                 do_end_request = 1;
 393                         } else {
 394                                 struct cdrom_info *info = drive->driver_data;
 395
 396                                 /*
 397                                  * Allow the drive 5 seconds to recover, some
 398                                  * devices will return this error while flushing
 399                                  * data from cache.
 400                                  */
 401                                 if (!rq->errors)
 402                                         info->write_timeout = jiffies +
 403                                                         ATAPI_WAIT_WRITE_BUSY;
 404                                 rq->errors = 1;
 405                                 if (time_after(jiffies, info->write_timeout))
 406                                         do_end_request = 1;
 407                                 else {
 408                                         struct request_queue *q = drive->queue;
 409                                         unsigned long flags;
 410
 411                                         /*
 412                                          * take a breather relying on the unplug
 413                                          * timer to kick us again
 414                                          */
 415                                         spin_lock_irqsave(q->queue_lock, flags);
 416                                         blk_plug_device(q);
 417                                         spin_unlock_irqrestore(q->queue_lock, flags);
 418
 419                                         return 1;
 420                                 }
 421                         }
 422                 } else if (sense_key == UNIT_ATTENTION) {
 423                         /* media change */
 424                         cdrom_saw_media_change(drive);
 425
 426                         /*
 427                          * Arrange to retry the request but be sure to give up
 428                          * if we've retried too many times.
 429                          */
 430                         if (++rq->errors > ERROR_MAX)
 431                                 do_end_request = 1;
 432                 } else if (sense_key == ILLEGAL_REQUEST ||
 433                            sense_key == DATA_PROTECT) {
 434                         /*
 435                          * No point in retrying after an illegal request or data
 436                          * protect error.
 437                          */
 438                         ide_dump_status(drive, "command error", stat);
 439                         do_end_request = 1;
 440                 } else if (sense_key == MEDIUM_ERROR) {
 441                         /*
 442                          * No point in re-trying a zillion times on a bad
 443                          * sector. If we got here the error is not correctable.
 444                          */
 445                         ide_dump_status(drive, "media error (bad sector)",
 446                                         stat);
 447                         do_end_request = 1;
 448                 } else if (sense_key == BLANK_CHECK) {
 449                         /* disk appears blank ?? */
 450                         ide_dump_status(drive, "media error (blank)", stat);
 451                         do_end_request = 1;
 452                 } else if ((err & ~ATA_ABORTED) != 0) {
 453                         /* go to the default handler for other errors */
 454                         ide_error(drive, "cdrom_decode_status", stat);
 455                         return 1;
 456                 } else if ((++rq->errors > ERROR_MAX)) {
 457                         /* we've racked up too many retries, abort */
 458                         do_end_request = 1;
 459                 }
 460
 461                 /*
 462                  * End a request through request sense analysis when we have
 463                  * sense data. We need this in order to perform end of media
 464                  * processing.
 465                  */
 466                 if (do_end_request)
 467                         goto end_request;
 468
 469                 /*
 470                  * If we got a CHECK_CONDITION status, queue
 471                  * a request sense command.
 472                  */
 473                 if (stat & ATA_ERR)
 474                         cdrom_queue_request_sense(drive, NULL, NULL);
 475         } else {
 476                 blk_dump_rq_flags(rq, PFX "bad rq");
 477                 cdrom_end_request(drive, 0);
 478         }
 479
 480         /* retry, or handle the next request */
 481         return 1;
 482
 483 end_request:
 484         if (stat & ATA_ERR) {
 485                 struct request_queue *q = drive->queue;
 486                 unsigned long flags;
 487
 488                 spin_lock_irqsave(q->queue_lock, flags);
 489                 blkdev_dequeue_request(rq);
 490                 spin_unlock_irqrestore(q->queue_lock, flags);
 491
 492                 hwif->rq = NULL;
 493
 494                 cdrom_queue_request_sense(drive, rq->sense, rq);
 495         } else
 496                 cdrom_end_request(drive, 0);
 497
 498         return 1;
 499 }
 500
 501 /*
 502  * Check the contents of the interrupt reason register from the cdrom
 503  * and attempt to recover if there are problems.  Returns  0 if everything's
 504  * ok; nonzero if the request has been terminated.
 505  */
 506 static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
 507                                 int len, int ireason, int rw)
 508 {
 509         ide_hwif_t *hwif = drive->hwif;
 510
 511         ide_debug_log(IDE_DBG_FUNC, "ireason: 0x%x, rw: 0x%x", ireason, rw);
 512
 513         /*
 514          * ireason == 0: the drive wants to receive data from us
 515          * ireason == 2: the drive is expecting to transfer data to us
 516          */
 517         if (ireason == (!rw << 1))
 518                 return 0;
 519         else if (ireason == (rw << 1)) {
 520
 521                 /* whoops... */
 522                 printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n",
 523                                 drive->name, __func__);
 524
 525                 ide_pad_transfer(drive, rw, len);
 526         } else  if (rw == 0 && ireason == 1) {
 527                 /*
 528                  * Some drives (ASUS) seem to tell us that status info is
 529                  * available.  Just get it and ignore.
 530                  */
 531                 (void)hwif->tp_ops->read_status(hwif);
 532                 return 0;
 533         } else {
 534                 /* drive wants a command packet, or invalid ireason... */
 535                 printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n",
 536                                 drive->name, __func__, ireason);
 537         }
 538
 539         if (rq->cmd_type == REQ_TYPE_ATA_PC)
 540                 rq->cmd_flags |= REQ_FAILED;
 541
 542         cdrom_end_request(drive, 0);
 543         return -1;
 544 }
 545
 546 /*
 547  * Assume that the drive will always provide data in multiples of at least
 548  * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise.
 549  */
 550 static int ide_cd_check_transfer_size(ide_drive_t *drive, int len)
 551 {
 552         ide_debug_log(IDE_DBG_FUNC, "len: %d", len);
 553
 554         if ((len % SECTOR_SIZE) == 0)
 555                 return 0;
 556
 557         printk(KERN_ERR PFX "%s: %s: Bad transfer size %d\n", drive->name,
 558                         __func__, len);
 559
 560         if (drive->atapi_flags & IDE_AFLAG_LIMIT_NFRAMES)
 561                 printk(KERN_ERR PFX "This drive is not supported by this "
 562                                 "version of the driver\n");
 563         else {
 564                 printk(KERN_ERR PFX "Trying to limit transfer sizes\n");
 565                 drive->atapi_flags |= IDE_AFLAG_LIMIT_NFRAMES;
 566         }
 567
 568         return 1;
 569 }
 570
 571 static ide_startstop_t ide_cd_prepare_rw_request(ide_drive_t *drive,
 572                                                  struct request *rq)
 573 {
 574         ide_debug_log(IDE_DBG_RQ, "rq->cmd_flags: 0x%x", rq->cmd_flags);
 575
 576         if (rq_data_dir(rq) == READ) {
 577                 unsigned short sectors_per_frame =
 578                         queue_hardsect_size(drive->queue) >> SECTOR_BITS;
 579                 int nskip = rq->sector & (sectors_per_frame - 1);
 580
 581                 /*
 582                  * If the requested sector doesn't start on a frame boundary,
 583                  * we must adjust the start of the transfer so that it does,
 584                  * and remember to skip the first few sectors.
 585                  *
 586                  * If the rq->current_nr_sectors field is larger than the size
 587                  * of the buffer, it will mean that we're to skip a number of
 588                  * sectors equal to the amount by which rq->current_nr_sectors
 589                  * is larger than the buffer size.
 590                  */
 591                 if (nskip > 0) {
 592                         /* sanity check... */
 593                         if (rq->current_nr_sectors !=
 594                             bio_cur_sectors(rq->bio)) {
 595                                 printk(KERN_ERR PFX "%s: %s: buffer botch (%u)\n",
 596                                                 drive->name, __func__,
 597                                                 rq->current_nr_sectors);
 598                                 cdrom_end_request(drive, 0);
 599                                 return ide_stopped;
 600                         }
 601                         rq->current_nr_sectors += nskip;
 602                 }
 603         }
 604
 605         /* set up the command */
 606         rq->timeout = ATAPI_WAIT_PC;
 607
 608         return ide_started;
 609 }
 610
 611 /*
 612  * Fix up a possibly partially-processed request so that we can start it over
 613  * entirely, or even put it back on the request queue.
 614  */
 615 static void ide_cd_restore_request(ide_drive_t *drive, struct request *rq)
 616 {
 617
 618         ide_debug_log(IDE_DBG_FUNC, "enter");
 619
 620         if (rq->buffer != bio_data(rq->bio)) {
 621                 sector_t n =
 622                         (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE;
 623
 624                 rq->buffer = bio_data(rq->bio);
 625                 rq->nr_sectors += n;
 626                 rq->sector -= n;
 627         }
 628         rq->current_nr_sectors = bio_cur_sectors(rq->bio);
 629         rq->hard_cur_sectors = rq->current_nr_sectors;
 630         rq->hard_nr_sectors = rq->nr_sectors;
 631         rq->hard_sector = rq->sector;
 632         rq->q->prep_rq_fn(rq->q, rq);
 633 }
 634
 635 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct request *rq)
 636 {
 637         ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]);
 638
 639         /*
 640          * Some of the trailing request sense fields are optional,
 641          * and some drives don't send them.  Sigh.
 642          */
 643         if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
 644             rq->data_len > 0 && rq->data_len <= 5)
 645                 while (rq->data_len > 0) {
 646                         *(u8 *)rq->data++ = 0;
 647                         --rq->data_len;
 648                 }
 649 }
 650
 651 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
 652                     int write, void *buffer, unsigned *bufflen,
 653                     struct request_sense *sense, int timeout,
 654                     unsigned int cmd_flags)
 655 {
 656         struct cdrom_info *info = drive->driver_data;
 657         struct request_sense local_sense;
 658         int retries = 10;
 659         unsigned int flags = 0;
 660
 661         if (!sense)
 662                 sense = &local_sense;
 663
 664         ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, "
 665                                   "cmd_flags: 0x%x",
 666                                   cmd[0], write, timeout, cmd_flags);
 667
 668         /* start of retry loop */
 669         do {
 670                 struct request *rq;
 671                 int error;
 672
 673                 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
 674
 675                 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
 676                 rq->cmd_type = REQ_TYPE_ATA_PC;
 677                 rq->sense = sense;
 678                 rq->cmd_flags |= cmd_flags;
 679                 rq->timeout = timeout;
 680                 if (buffer) {
 681                         rq->data = buffer;
 682                         rq->data_len = *bufflen;
 683                 }
 684
 685                 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
 686
 687                 if (buffer)
 688                         *bufflen = rq->data_len;
 689
 690                 flags = rq->cmd_flags;
 691                 blk_put_request(rq);
 692
 693                 /*
 694                  * FIXME: we should probably abort/retry or something in case of
 695                  * failure.
 696                  */
 697                 if (flags & REQ_FAILED) {
 698                         /*
 699                          * The request failed.  Retry if it was due to a unit
 700                          * attention status (usually means media was changed).
 701                          */
 702                         struct request_sense *reqbuf = sense;
 703
 704                         if (reqbuf->sense_key == UNIT_ATTENTION)
 705                                 cdrom_saw_media_change(drive);
 706                         else if (reqbuf->sense_key == NOT_READY &&
 707                                  reqbuf->asc == 4 && reqbuf->ascq != 4) {
 708                                 /*
 709                                  * The drive is in the process of loading
 710                                  * a disk.  Retry, but wait a little to give
 711                                  * the drive time to complete the load.
 712                                  */
 713                                 ssleep(2);
 714                         } else {
 715                                 /* otherwise, don't retry */
 716                                 retries = 0;
 717                         }
 718                         --retries;
 719                 }
 720
 721                 /* end of retry loop */
 722         } while ((flags & REQ_FAILED) && retries >= 0);
 723
 724         /* return an error if the command failed */
 725         return (flags & REQ_FAILED) ? -EIO : 0;
 726 }
 727
 728 /*
 729  * Called from blk_end_request_callback() after the data of the request is
 730  * completed and before the request itself is completed. By returning value '1',
 731  * blk_end_request_callback() returns immediately without completing it.
 732  */
 733 static int cdrom_newpc_intr_dummy_cb(struct request *rq)
 734 {
 735         return 1;
 736 }
 737
 738 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 739 {
 740         ide_hwif_t *hwif = drive->hwif;
 741         struct request *rq = hwif->rq;
 742         xfer_func_t *xferfunc;
 743         ide_expiry_t *expiry = NULL;
 744         int dma_error = 0, dma, stat, thislen, uptodate = 0;
 745         int write = (rq_data_dir(rq) == WRITE) ? 1 : 0;
 746         unsigned int timeout;
 747         u16 len;
 748         u8 ireason;
 749
 750         ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x",
 751                                   rq->cmd[0], write);
 752
 753         /* check for errors */
 754         dma = drive->dma;
 755         if (dma) {
 756                 drive->dma = 0;
 757                 dma_error = hwif->dma_ops->dma_end(drive);
 758                 if (dma_error) {
 759                         printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
 760                                         write ? "write" : "read");
 761                         ide_dma_off(drive);
 762                 }
 763         }
 764
 765         if (cdrom_decode_status(drive, 0, &stat))
 766                 return ide_stopped;
 767
 768         /* using dma, transfer is complete now */
 769         if (dma) {
 770                 if (dma_error)
 771                         return ide_error(drive, "dma error", stat);
 772                 if (blk_fs_request(rq)) {
 773                         ide_complete_rq(drive, 0, rq->nr_sectors
 774                                 ? (rq->nr_sectors << 9) : ide_rq_bytes(rq));
 775                         return ide_stopped;
 776                 } else if (rq->cmd_type == REQ_TYPE_ATA_PC && !rq->bio) {
 777                         ide_complete_rq(drive, 0, 512);
 778                         return ide_stopped;
 779                 }
 780                 goto end_request;
 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                         cdrom_end_request(drive, uptodate);
 810                         return ide_stopped;
 811                 } else if (!blk_pc_request(rq)) {
 812                         ide_cd_request_sense_fixup(drive, rq);
 813                         /* complain if we still have data left to transfer */
 814                         uptodate = rq->data_len ? 0 : 1;
 815                 }
 816                 goto end_request;
 817         }
 818
 819         /* check which way to transfer data */
 820         if (ide_cd_check_ireason(drive, rq, len, ireason, write))
 821                 return ide_stopped;
 822
 823         if (blk_fs_request(rq)) {
 824                 if (write == 0) {
 825                         int nskip;
 826
 827                         if (ide_cd_check_transfer_size(drive, len)) {
 828                                 cdrom_end_request(drive, 0);
 829                                 return ide_stopped;
 830                         }
 831
 832                         /*
 833                          * First, figure out if we need to bit-bucket
 834                          * any of the leading sectors.
 835                          */
 836                         nskip = min_t(int, rq->current_nr_sectors
 837                                            - bio_cur_sectors(rq->bio),
 838                                            thislen >> 9);
 839                         if (nskip > 0) {
 840                                 ide_pad_transfer(drive, write, nskip << 9);
 841                                 rq->current_nr_sectors -= nskip;
 842                                 thislen -= (nskip << 9);
 843                         }
 844                 }
 845         }
 846
 847         if (ireason == 0) {
 848                 write = 1;
 849                 xferfunc = hwif->tp_ops->output_data;
 850         } else {
 851                 write = 0;
 852                 xferfunc = hwif->tp_ops->input_data;
 853         }
 854
 855         ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, "
 856                                   "ireason: 0x%x",
 857                                   rq->cmd_type, ireason);
 858
 859         /* transfer data */
 860         while (thislen > 0) {
 861                 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data;
 862                 int blen = rq->data_len;
 863
 864                 /* bio backed? */
 865                 if (rq->bio) {
 866                         if (blk_fs_request(rq)) {
 867                                 ptr = rq->buffer;
 868                                 blen = rq->current_nr_sectors << 9;
 869                         } else {
 870                                 ptr = bio_data(rq->bio);
 871                                 blen = bio_iovec(rq->bio)->bv_len;
 872                         }
 873                 }
 874
 875                 if (!ptr) {
 876                         if (blk_fs_request(rq) && !write)
 877                                 /*
 878                                  * If the buffers are full, pipe the rest into
 879                                  * oblivion.
 880                                  */
 881                                 ide_pad_transfer(drive, 0, thislen);
 882                         else {
 883                                 printk(KERN_ERR PFX "%s: confused, missing data\n",
 884                                                 drive->name);
 885                                 blk_dump_rq_flags(rq, rq_data_dir(rq)
 886                                                   ? "cdrom_newpc_intr, write"
 887                                                   : "cdrom_newpc_intr, read");
 888                         }
 889                         break;
 890                 }
 891
 892                 if (blen > thislen)
 893                         blen = thislen;
 894
 895                 xferfunc(drive, NULL, ptr, blen);
 896
 897                 thislen -= blen;
 898                 len -= blen;
 899
 900                 if (blk_fs_request(rq)) {
 901                         rq->buffer += blen;
 902                         rq->nr_sectors -= (blen >> 9);
 903                         rq->current_nr_sectors -= (blen >> 9);
 904                         rq->sector += (blen >> 9);
 905
 906                         if (rq->current_nr_sectors == 0 && rq->nr_sectors)
 907                                 cdrom_end_request(drive, 1);
 908                 } else {
 909                         rq->data_len -= blen;
 910
 911                         /*
 912                          * The request can't be completed until DRQ is cleared.
 913                          * So complete the data, but don't complete the request
 914                          * using the dummy function for the callback feature
 915                          * of blk_end_request_callback().
 916                          */
 917                         if (rq->bio)
 918                                 blk_end_request_callback(rq, 0, blen,
 919                                                  cdrom_newpc_intr_dummy_cb);
 920                         else
 921                                 rq->data += blen;
 922                 }
 923                 if (!write && blk_sense_request(rq))
 924                         rq->sense_len += blen;
 925         }
 926
 927         /* pad, if necessary */
 928         if (!blk_fs_request(rq) && len > 0)
 929                 ide_pad_transfer(drive, write, len);
 930
 931         if (blk_pc_request(rq)) {
 932                 timeout = rq->timeout;
 933         } else {
 934                 timeout = ATAPI_WAIT_PC;
 935                 if (!blk_fs_request(rq))
 936                         expiry = ide_cd_expiry;
 937         }
 938
 939         hwif->expiry = expiry;
 940         ide_set_handler(drive, cdrom_newpc_intr, timeout);
 941         return ide_started;
 942
 943 end_request:
 944         if (blk_pc_request(rq)) {
 945                 unsigned int dlen = rq->data_len;
 946
 947                 if (dma)
 948                         rq->data_len = 0;
 949
 950                 if (blk_end_request(rq, 0, dlen))
 951                         BUG();
 952
 953                 hwif->rq = NULL;
 954         } else {
 955                 if (!uptodate)
 956                         rq->cmd_flags |= REQ_FAILED;
 957                 cdrom_end_request(drive, uptodate);
 958         }
 959         return ide_stopped;
 960 }
 961
 962 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
 963 {
 964         struct cdrom_info *cd = drive->driver_data;
 965         int write = rq_data_dir(rq) == WRITE;
 966         unsigned short sectors_per_frame =
 967                 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
 968
 969         ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, write: 0x%x, "
 970                                   "secs_per_frame: %u",
 971                                   rq->cmd[0], write, sectors_per_frame);
 972
 973         if (write) {
 974                 /* disk has become write protected */
 975                 if (get_disk_ro(cd->disk)) {
 976                         cdrom_end_request(drive, 0);
 977                         return ide_stopped;
 978                 }
 979         } else {
 980                 /*
 981                  * We may be retrying this request after an error.  Fix up any
 982                  * weirdness which might be present in the request packet.
 983                  */
 984                 ide_cd_restore_request(drive, rq);
 985         }
 986
 987         /* use DMA, if possible / writes *must* be hardware frame aligned */
 988         if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
 989             (rq->sector & (sectors_per_frame - 1))) {
 990                 if (write) {
 991                         cdrom_end_request(drive, 0);
 992                         return ide_stopped;
 993                 }
 994                 drive->dma = 0;
 995         } else
 996                 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
 997
 998         if (write)
 999                 cd->devinfo.media_written = 1;
1000
1001         return ide_started;
1002 }
1003
1004 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
1005 {
1006
1007         ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
1008                                   rq->cmd[0], rq->cmd_type);
1009
1010         if (blk_pc_request(rq))
1011                 rq->cmd_flags |= REQ_QUIET;
1012         else
1013                 rq->cmd_flags &= ~REQ_FAILED;
1014
1015         drive->dma = 0;
1016
1017         /* sg request */
1018         if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) {
1019                 struct request_queue *q = drive->queue;
1020                 unsigned int alignment;
1021                 char *buf;
1022
1023                 if (rq->bio)
1024                         buf = bio_data(rq->bio);
1025                 else
1026                         buf = rq->data;
1027
1028                 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1029
1030                 /*
1031                  * check if dma is safe
1032                  *
1033                  * NOTE! The "len" and "addr" checks should possibly have
1034                  * separate masks.
1035                  */
1036                 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
1037                 if ((unsigned long)buf & alignment
1038                     || rq->data_len & q->dma_pad_mask
1039                     || object_is_on_stack(buf))
1040                         drive->dma = 0;
1041         }
1042 }
1043
1044 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
1045                                         sector_t block)
1046 {
1047         struct ide_cmd cmd;
1048
1049         ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
1050                                   rq->cmd[0], (unsigned long long)block);
1051
1052         if (drive->debug_mask & IDE_DBG_RQ)
1053                 blk_dump_rq_flags(rq, "ide_cd_do_request");
1054
1055         if (blk_fs_request(rq)) {
1056                 if (cdrom_start_rw(drive, rq) == ide_stopped)
1057                         return ide_stopped;
1058
1059                 if (ide_cd_prepare_rw_request(drive, rq) == ide_stopped)
1060                         return ide_stopped;
1061         } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
1062                    rq->cmd_type == REQ_TYPE_ATA_PC) {
1063                 if (!rq->timeout)
1064                         rq->timeout = ATAPI_WAIT_PC;
1065
1066                 cdrom_do_block_pc(drive, rq);
1067         } else if (blk_special_request(rq)) {
1068                 /* right now this can only be a reset... */
1069                 cdrom_end_request(drive, 1);
1070                 return ide_stopped;
1071         } else {
1072                 blk_dump_rq_flags(rq, DRV_NAME " bad flags");
1073                 cdrom_end_request(drive, 0);
1074                 return ide_stopped;
1075         }
1076
1077         memset(&cmd, 0, sizeof(cmd));
1078
1079         if (rq_data_dir(rq))
1080                 cmd.tf_flags |= IDE_TFLAG_WRITE;
1081
1082         cmd.rq = rq;
1083
1084         return ide_issue_pc(drive, &cmd);
1085 }
1086
1087 /*
1088  * Ioctl handling.
1089  *
1090  * Routines which queue packet commands take as a final argument a pointer to a
1091  * request_sense struct. If execution of the command results in an error with a
1092  * CHECK CONDITION status, this structure will be filled with the results of the
1093  * subsequent request sense command. The pointer can also be NULL, in which case
1094  * no sense information is returned.
1095  */
1096 static void msf_from_bcd(struct atapi_msf *msf)
1097 {
1098         msf->minute = bcd2bin(msf->minute);
1099         msf->second = bcd2bin(msf->second);
1100         msf->frame  = bcd2bin(msf->frame);
1101 }
1102
1103 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
1104 {
1105         struct cdrom_info *info = drive->driver_data;
1106         struct cdrom_device_info *cdi = &info->devinfo;
1107         unsigned char cmd[BLK_MAX_CDB];
1108
1109         ide_debug_log(IDE_DBG_FUNC, "enter");
1110
1111         memset(cmd, 0, BLK_MAX_CDB);
1112         cmd[0] = GPCMD_TEST_UNIT_READY;
1113
1114         /*
1115          * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
1116          * instead of supporting the LOAD_UNLOAD opcode.
1117          */
1118         cmd[7] = cdi->sanyo_slot % 3;
1119
1120         return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
1121 }
1122
1123 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
1124                                unsigned long *sectors_per_frame,
1125                                struct request_sense *sense)
1126 {
1127         struct {
1128                 __be32 lba;
1129                 __be32 blocklen;
1130         } capbuf;
1131
1132         int stat;
1133         unsigned char cmd[BLK_MAX_CDB];
1134         unsigned len = sizeof(capbuf);
1135         u32 blocklen;
1136
1137         ide_debug_log(IDE_DBG_FUNC, "enter");
1138
1139         memset(cmd, 0, BLK_MAX_CDB);
1140         cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1141
1142         stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
1143                                REQ_QUIET);
1144         if (stat)
1145                 return stat;
1146
1147         /*
1148          * Sanity check the given block size
1149          */
1150         blocklen = be32_to_cpu(capbuf.blocklen);
1151         switch (blocklen) {
1152         case 512:
1153         case 1024:
1154         case 2048:
1155         case 4096:
1156                 break;
1157         default:
1158                 printk(KERN_ERR PFX "%s: weird block size %u\n",
1159                                 drive->name, blocklen);
1160                 printk(KERN_ERR PFX "%s: default to 2kb block size\n",
1161                                 drive->name);
1162                 blocklen = 2048;
1163                 break;
1164         }
1165
1166         *capacity = 1 + be32_to_cpu(capbuf.lba);
1167         *sectors_per_frame = blocklen >> SECTOR_BITS;
1168
1169         ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu",
1170                                      *capacity, *sectors_per_frame);
1171
1172         return 0;
1173 }
1174
1175 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1176                                 int format, char *buf, int buflen,
1177                                 struct request_sense *sense)
1178 {
1179         unsigned char cmd[BLK_MAX_CDB];
1180
1181         ide_debug_log(IDE_DBG_FUNC, "enter");
1182
1183         memset(cmd, 0, BLK_MAX_CDB);
1184
1185         cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1186         cmd[6] = trackno;
1187         cmd[7] = (buflen >> 8);
1188         cmd[8] = (buflen & 0xff);
1189         cmd[9] = (format << 6);
1190
1191         if (msf_flag)
1192                 cmd[1] = 2;
1193
1194         return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
1195 }
1196
1197 /* Try to read the entire TOC for the disk into our internal buffer. */
1198 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1199 {
1200         int stat, ntracks, i;
1201         struct cdrom_info *info = drive->driver_data;
1202         struct cdrom_device_info *cdi = &info->devinfo;
1203         struct atapi_toc *toc = info->toc;
1204         struct {
1205                 struct atapi_toc_header hdr;
1206                 struct atapi_toc_entry  ent;
1207         } ms_tmp;
1208         long last_written;
1209         unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1210
1211         ide_debug_log(IDE_DBG_FUNC, "enter");
1212
1213         if (toc == NULL) {
1214                 /* try to allocate space */
1215                 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1216                 if (toc == NULL) {
1217                         printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
1218                                         drive->name);
1219                         return -ENOMEM;
1220                 }
1221                 info->toc = toc;
1222         }
1223
1224         /*
1225          * Check to see if the existing data is still valid. If it is,
1226          * just return.
1227          */
1228         (void) cdrom_check_status(drive, sense);
1229
1230         if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
1231                 return 0;
1232
1233         /* try to get the total cdrom capacity and sector size */
1234         stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1235                                    sense);
1236         if (stat)
1237                 toc->capacity = 0x1fffff;
1238
1239         set_capacity(info->disk, toc->capacity * sectors_per_frame);
1240         /* save a private copy of the TOC capacity for error handling */
1241         drive->probed_capacity = toc->capacity * sectors_per_frame;
1242
1243         blk_queue_hardsect_size(drive->queue,
1244                                 sectors_per_frame << SECTOR_BITS);
1245
1246         /* first read just the header, so we know how long the TOC is */
1247         stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1248                                     sizeof(struct atapi_toc_header), sense);
1249         if (stat)
1250                 return stat;
1251
1252         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1253                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1254                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1255         }
1256
1257         ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1258         if (ntracks <= 0)
1259                 return -EIO;
1260         if (ntracks > MAX_TRACKS)
1261                 ntracks = MAX_TRACKS;
1262
1263         /* now read the whole schmeer */
1264         stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1265                                   (char *)&toc->hdr,
1266                                    sizeof(struct atapi_toc_header) +
1267                                    (ntracks + 1) *
1268                                    sizeof(struct atapi_toc_entry), sense);
1269
1270         if (stat && toc->hdr.first_track > 1) {
1271                 /*
1272                  * Cds with CDI tracks only don't have any TOC entries, despite
1273                  * of this the returned values are
1274                  * first_track == last_track = number of CDI tracks + 1,
1275                  * so that this case is indistinguishable from the same layout
1276                  * plus an additional audio track. If we get an error for the
1277                  * regular case, we assume a CDI without additional audio
1278                  * tracks. In this case the readable TOC is empty (CDI tracks
1279                  * are not included) and only holds the Leadout entry.
1280                  *
1281                  * Heiko Eißfeldt.
1282                  */
1283                 ntracks = 0;
1284                 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1285                                            (char *)&toc->hdr,
1286                                            sizeof(struct atapi_toc_header) +
1287                                            (ntracks + 1) *
1288                                            sizeof(struct atapi_toc_entry),
1289                                            sense);
1290                 if (stat)
1291                         return stat;
1292
1293                 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1294                         toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1295                         toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1296                 } else {
1297                         toc->hdr.first_track = CDROM_LEADOUT;
1298                         toc->hdr.last_track = CDROM_LEADOUT;
1299                 }
1300         }
1301
1302         if (stat)
1303                 return stat;
1304
1305         toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1306
1307         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1308                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1309                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1310         }
1311
1312         for (i = 0; i <= ntracks; i++) {
1313                 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1314                         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1315                                 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1316                         msf_from_bcd(&toc->ent[i].addr.msf);
1317                 }
1318                 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1319                                                   toc->ent[i].addr.msf.second,
1320                                                   toc->ent[i].addr.msf.frame);
1321         }
1322
1323         if (toc->hdr.first_track != CDROM_LEADOUT) {
1324                 /* read the multisession information */
1325                 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1326                                            sizeof(ms_tmp), sense);
1327                 if (stat)
1328                         return stat;
1329
1330                 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1331         } else {
1332                 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1333                 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1334                 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1335         }
1336
1337         if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1338                 /* re-read multisession information using MSF format */
1339                 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1340                                            sizeof(ms_tmp), sense);
1341                 if (stat)
1342                         return stat;
1343
1344                 msf_from_bcd(&ms_tmp.ent.addr.msf);
1345                 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1346                                                    ms_tmp.ent.addr.msf.second,
1347                                                    ms_tmp.ent.addr.msf.frame);
1348         }
1349
1350         toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1351
1352         /* now try to get the total cdrom capacity */
1353         stat = cdrom_get_last_written(cdi, &last_written);
1354         if (!stat && (last_written > toc->capacity)) {
1355                 toc->capacity = last_written;
1356                 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1357                 drive->probed_capacity = toc->capacity * sectors_per_frame;
1358         }
1359
1360         /* Remember that we've read this stuff. */
1361         drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1362
1363         return 0;
1364 }
1365
1366 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1367 {
1368         struct cdrom_info *info = drive->driver_data;
1369         struct cdrom_device_info *cdi = &info->devinfo;
1370         struct packet_command cgc;
1371         int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1372
1373         ide_debug_log(IDE_DBG_FUNC, "enter");
1374
1375         if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1376                 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1377
1378         init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1379         do {
1380                 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1381                 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1382                 if (!stat)
1383                         break;
1384         } while (--attempts);
1385         return stat;
1386 }
1387
1388 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1389 {
1390         struct cdrom_info *cd = drive->driver_data;
1391         u16 curspeed, maxspeed;
1392
1393         ide_debug_log(IDE_DBG_FUNC, "enter");
1394
1395         if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1396                 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1397                 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1398         } else {
1399                 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1400                 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1401         }
1402
1403         ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u",
1404                                      curspeed, maxspeed);
1405
1406         cd->current_speed = (curspeed + (176/2)) / 176;
1407         cd->max_speed = (maxspeed + (176/2)) / 176;
1408 }
1409
1410 #define IDE_CD_CAPABILITIES \
1411         (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1412          CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1413          CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1414          CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1415          CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1416
1417 static struct cdrom_device_ops ide_cdrom_dops = {
1418         .open                   = ide_cdrom_open_real,
1419         .release                = ide_cdrom_release_real,
1420         .drive_status           = ide_cdrom_drive_status,
1421         .media_changed          = ide_cdrom_check_media_change_real,
1422         .tray_move              = ide_cdrom_tray_move,
1423         .lock_door              = ide_cdrom_lock_door,
1424         .select_speed           = ide_cdrom_select_speed,
1425         .get_last_session       = ide_cdrom_get_last_session,
1426         .get_mcn                = ide_cdrom_get_mcn,
1427         .reset                  = ide_cdrom_reset,
1428         .audio_ioctl            = ide_cdrom_audio_ioctl,
1429         .capability             = IDE_CD_CAPABILITIES,
1430         .generic_packet         = ide_cdrom_packet,
1431 };
1432
1433 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1434 {
1435         struct cdrom_info *info = drive->driver_data;
1436         struct cdrom_device_info *devinfo = &info->devinfo;
1437
1438         ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots);
1439
1440         devinfo->ops = &ide_cdrom_dops;
1441         devinfo->speed = info->current_speed;
1442         devinfo->capacity = nslots;
1443         devinfo->handle = drive;
1444         strcpy(devinfo->name, drive->name);
1445
1446         if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1447                 devinfo->mask |= CDC_SELECT_SPEED;
1448
1449         devinfo->disk = info->disk;
1450         return register_cdrom(devinfo);
1451 }
1452
1453 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1454 {
1455         struct cdrom_info *cd = drive->driver_data;
1456         struct cdrom_device_info *cdi = &cd->devinfo;
1457         u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1458         mechtype_t mechtype;
1459         int nslots = 1;
1460
1461         ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx",
1462                                      drive->media, drive->atapi_flags);
1463
1464         cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1465                      CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1466                      CDC_MO_DRIVE | CDC_RAM);
1467
1468         if (drive->media == ide_optical) {
1469                 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1470                 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1471                                 drive->name);
1472                 return nslots;
1473         }
1474
1475         if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1476                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1477                 cdi->mask &= ~CDC_PLAY_AUDIO;
1478                 return nslots;
1479         }
1480
1481         /*
1482          * We have to cheat a little here. the packet will eventually be queued
1483          * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1484          * Since this device hasn't been registered with the Uniform layer yet,
1485          * it can't do this. Same goes for cdi->ops.
1486          */
1487         cdi->handle = drive;
1488         cdi->ops = &ide_cdrom_dops;
1489
1490         if (ide_cdrom_get_capabilities(drive, buf))
1491                 return 0;
1492
1493         if ((buf[8 + 6] & 0x01) == 0)
1494                 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1495         if (buf[8 + 6] & 0x08)
1496                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1497         if (buf[8 + 3] & 0x01)
1498                 cdi->mask &= ~CDC_CD_R;
1499         if (buf[8 + 3] & 0x02)
1500                 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1501         if (buf[8 + 2] & 0x38)
1502                 cdi->mask &= ~CDC_DVD;
1503         if (buf[8 + 3] & 0x20)
1504                 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1505         if (buf[8 + 3] & 0x10)
1506                 cdi->mask &= ~CDC_DVD_R;
1507         if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1508                 cdi->mask &= ~CDC_PLAY_AUDIO;
1509
1510         mechtype = buf[8 + 6] >> 5;
1511         if (mechtype == mechtype_caddy ||
1512             mechtype == mechtype_popup ||
1513             (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1514                 cdi->mask |= CDC_CLOSE_TRAY;
1515
1516         if (cdi->sanyo_slot > 0) {
1517                 cdi->mask &= ~CDC_SELECT_DISC;
1518                 nslots = 3;
1519         } else if (mechtype == mechtype_individual_changer ||
1520                    mechtype == mechtype_cartridge_changer) {
1521                 nslots = cdrom_number_of_slots(cdi);
1522                 if (nslots > 1)
1523                         cdi->mask &= ~CDC_SELECT_DISC;
1524         }
1525
1526         ide_cdrom_update_speed(drive, buf);
1527
1528         printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1529
1530         /* don't print speed if the drive reported 0 */
1531         if (cd->max_speed)
1532                 printk(KERN_CONT " %dX", cd->max_speed);
1533
1534         printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1535
1536         if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1537                 printk(KERN_CONT " DVD%s%s",
1538                                  (cdi->mask & CDC_DVD_R) ? "" : "-R",
1539                                  (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1540
1541         if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1542                 printk(KERN_CONT " CD%s%s",
1543                                  (cdi->mask & CDC_CD_R) ? "" : "-R",
1544                                  (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1545
1546         if ((cdi->mask & CDC_SELECT_DISC) == 0)
1547                 printk(KERN_CONT " changer w/%d slots", nslots);
1548         else
1549                 printk(KERN_CONT " drive");
1550
1551         printk(KERN_CONT ", %dkB Cache\n",
1552                          be16_to_cpup((__be16 *)&buf[8 + 12]));
1553
1554         return nslots;
1555 }
1556
1557 /* standard prep_rq_fn that builds 10 byte cmds */
1558 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1559 {
1560         int hard_sect = queue_hardsect_size(q);
1561         long block = (long)rq->hard_sector / (hard_sect >> 9);
1562         unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1563
1564         memset(rq->cmd, 0, BLK_MAX_CDB);
1565
1566         if (rq_data_dir(rq) == READ)
1567                 rq->cmd[0] = GPCMD_READ_10;
1568         else
1569                 rq->cmd[0] = GPCMD_WRITE_10;
1570
1571         /*
1572          * fill in lba
1573          */
1574         rq->cmd[2] = (block >> 24) & 0xff;
1575         rq->cmd[3] = (block >> 16) & 0xff;
1576         rq->cmd[4] = (block >>  8) & 0xff;
1577         rq->cmd[5] = block & 0xff;
1578
1579         /*
1580          * and transfer length
1581          */
1582         rq->cmd[7] = (blocks >> 8) & 0xff;
1583         rq->cmd[8] = blocks & 0xff;
1584         rq->cmd_len = 10;
1585         return BLKPREP_OK;
1586 }
1587
1588 /*
1589  * Most of the SCSI commands are supported directly by ATAPI devices.
1590  * This transform handles the few exceptions.
1591  */
1592 static int ide_cdrom_prep_pc(struct request *rq)
1593 {
1594         u8 *c = rq->cmd;
1595
1596         /* transform 6-byte read/write commands to the 10-byte version */
1597         if (c[0] == READ_6 || c[0] == WRITE_6) {
1598                 c[8] = c[4];
1599                 c[5] = c[3];
1600                 c[4] = c[2];
1601                 c[3] = c[1] & 0x1f;
1602                 c[2] = 0;
1603                 c[1] &= 0xe0;
1604                 c[0] += (READ_10 - READ_6);
1605                 rq->cmd_len = 10;
1606                 return BLKPREP_OK;
1607         }
1608
1609         /*
1610          * it's silly to pretend we understand 6-byte sense commands, just
1611          * reject with ILLEGAL_REQUEST and the caller should take the
1612          * appropriate action
1613          */
1614         if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1615                 rq->errors = ILLEGAL_REQUEST;
1616                 return BLKPREP_KILL;
1617         }
1618
1619         return BLKPREP_OK;
1620 }
1621
1622 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1623 {
1624         if (blk_fs_request(rq))
1625                 return ide_cdrom_prep_fs(q, rq);
1626         else if (blk_pc_request(rq))
1627                 return ide_cdrom_prep_pc(rq);
1628
1629         return 0;
1630 }
1631
1632 struct cd_list_entry {
1633         const char      *id_model;
1634         const char      *id_firmware;
1635         unsigned int    cd_flags;
1636 };
1637
1638 #ifdef CONFIG_IDE_PROC_FS
1639 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1640 {
1641         unsigned long capacity, sectors_per_frame;
1642
1643         if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1644                 return 0;
1645
1646         return capacity * sectors_per_frame;
1647 }
1648
1649 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1650                                         int count, int *eof, void *data)
1651 {
1652         ide_drive_t *drive = data;
1653         int len;
1654
1655         len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1656         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1657 }
1658
1659 static ide_proc_entry_t idecd_proc[] = {
1660         { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1661         { NULL, 0, NULL, NULL }
1662 };
1663
1664 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1665 {
1666         return idecd_proc;
1667 }
1668
1669 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1670 {
1671         return NULL;
1672 }
1673 #endif
1674
1675 static const struct cd_list_entry ide_cd_quirks_list[] = {
1676         /* Limit transfer size per interrupt. */
1677         { "SAMSUNG CD-ROM SCR-2430", NULL,   IDE_AFLAG_LIMIT_NFRAMES         },
1678         { "SAMSUNG CD-ROM SCR-2432", NULL,   IDE_AFLAG_LIMIT_NFRAMES         },
1679         /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1680         { "SAMSUNG CD-ROM SCR-3231", NULL,   IDE_AFLAG_NO_SPEED_SELECT       },
1681         /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1682         { "NEC CD-ROM DRIVE:260",    "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1683                                              IDE_AFLAG_PRE_ATAPI12,          },
1684         /* Vertos 300, some versions of this drive like to talk BCD. */
1685         { "V003S0DS",                NULL,   IDE_AFLAG_VERTOS_300_SSD,       },
1686         /* Vertos 600 ESD. */
1687         { "V006E0DS",                NULL,   IDE_AFLAG_VERTOS_600_ESD,       },
1688         /*
1689          * Sanyo 3 CD changer uses a non-standard command for CD changing
1690          * (by default standard ATAPI support for CD changers is used).
1691          */
1692         { "CD-ROM CDR-C3 G",         NULL,   IDE_AFLAG_SANYO_3CD             },
1693         { "CD-ROM CDR-C3G",          NULL,   IDE_AFLAG_SANYO_3CD             },
1694         { "CD-ROM CDR_C36",          NULL,   IDE_AFLAG_SANYO_3CD             },
1695         /* Stingray 8X CD-ROM. */
1696         { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1697         /*
1698          * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1699          * mode sense page capabilities size, but older drives break.
1700          */
1701         { "ATAPI CD ROM DRIVE 50X MAX", NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1702         { "WPI CDS-32X",                NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1703         /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1704         { "",                        "241N", IDE_AFLAG_LE_SPEED_FIELDS       },
1705         /*
1706          * Some drives used by Apple don't advertise audio play
1707          * but they do support reading TOC & audio datas.
1708          */
1709         { "MATSHITADVD-ROM SR-8187", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1710         { "MATSHITADVD-ROM SR-8186", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1711         { "MATSHITADVD-ROM SR-8176", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1712         { "MATSHITADVD-ROM SR-8174", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1713         { "Optiarc DVD RW AD-5200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1714         { "Optiarc DVD RW AD-7200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1715         { "Optiarc DVD RW AD-7543A", NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1716         { "TEAC CD-ROM CD-224E",     NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1717         { NULL, NULL, 0 }
1718 };
1719
1720 static unsigned int ide_cd_flags(u16 *id)
1721 {
1722         const struct cd_list_entry *cle = ide_cd_quirks_list;
1723
1724         while (cle->id_model) {
1725                 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1726                     (cle->id_firmware == NULL ||
1727                      strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1728                         return cle->cd_flags;
1729                 cle++;
1730         }
1731
1732         return 0;
1733 }
1734
1735 static int ide_cdrom_setup(ide_drive_t *drive)
1736 {
1737         struct cdrom_info *cd = drive->driver_data;
1738         struct cdrom_device_info *cdi = &cd->devinfo;
1739         u16 *id = drive->id;
1740         char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1741         int nslots;
1742
1743         ide_debug_log(IDE_DBG_PROBE, "enter");
1744
1745         blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
1746         blk_queue_dma_alignment(drive->queue, 31);
1747         blk_queue_update_dma_pad(drive->queue, 15);
1748         drive->queue->unplug_delay = (1 * HZ) / 1000;
1749         if (!drive->queue->unplug_delay)
1750                 drive->queue->unplug_delay = 1;
1751
1752         drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1753         drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1754
1755         if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1756             fw_rev[4] == '1' && fw_rev[6] <= '2')
1757                 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1758                                      IDE_AFLAG_TOCADDR_AS_BCD);
1759         else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1760                  fw_rev[4] == '1' && fw_rev[6] <= '2')
1761                 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1762         else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1763                 /* 3 => use CD in slot 0 */
1764                 cdi->sanyo_slot = 3;
1765
1766         nslots = ide_cdrom_probe_capabilities(drive);
1767
1768         /* set correct block size */
1769         blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
1770
1771         if (ide_cdrom_register(drive, nslots)) {
1772                 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1773                                 " cdrom driver.\n", drive->name, __func__);
1774                 cd->devinfo.handle = NULL;
1775                 return 1;
1776         }
1777
1778         ide_proc_register_driver(drive, cd->driver);
1779         return 0;
1780 }
1781
1782 static void ide_cd_remove(ide_drive_t *drive)
1783 {
1784         struct cdrom_info *info = drive->driver_data;
1785
1786         ide_debug_log(IDE_DBG_FUNC, "enter");
1787
1788         ide_proc_unregister_driver(drive, info->driver);
1789         device_del(&info->dev);
1790         del_gendisk(info->disk);
1791
1792         mutex_lock(&idecd_ref_mutex);
1793         put_device(&info->dev);
1794         mutex_unlock(&idecd_ref_mutex);
1795 }
1796
1797 static void ide_cd_release(struct device *dev)
1798 {
1799         struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
1800         struct cdrom_device_info *devinfo = &info->devinfo;
1801         ide_drive_t *drive = info->drive;
1802         struct gendisk *g = info->disk;
1803
1804         ide_debug_log(IDE_DBG_FUNC, "enter");
1805
1806         kfree(info->toc);
1807         if (devinfo->handle == drive)
1808                 unregister_cdrom(devinfo);
1809         drive->driver_data = NULL;
1810         blk_queue_prep_rq(drive->queue, NULL);
1811         g->private_data = NULL;
1812         put_disk(g);
1813         kfree(info);
1814 }
1815
1816 static int ide_cd_probe(ide_drive_t *);
1817
1818 static struct ide_driver ide_cdrom_driver = {
1819         .gen_driver = {
1820                 .owner          = THIS_MODULE,
1821                 .name           = "ide-cdrom",
1822                 .bus            = &ide_bus_type,
1823         },
1824         .probe                  = ide_cd_probe,
1825         .remove                 = ide_cd_remove,
1826         .version                = IDECD_VERSION,
1827         .do_request             = ide_cd_do_request,
1828 #ifdef CONFIG_IDE_PROC_FS
1829         .proc_entries           = ide_cd_proc_entries,
1830         .proc_devsets           = ide_cd_proc_devsets,
1831 #endif
1832 };
1833
1834 static int idecd_open(struct block_device *bdev, fmode_t mode)
1835 {
1836         struct cdrom_info *info = ide_cd_get(bdev->bd_disk);
1837         int rc = -ENOMEM;
1838
1839         if (!info)
1840                 return -ENXIO;
1841
1842         rc = cdrom_open(&info->devinfo, bdev, mode);
1843
1844         if (rc < 0)
1845                 ide_cd_put(info);
1846
1847         return rc;
1848 }
1849
1850 static int idecd_release(struct gendisk *disk, fmode_t mode)
1851 {
1852         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1853
1854         cdrom_release(&info->devinfo, mode);
1855
1856         ide_cd_put(info);
1857
1858         return 0;
1859 }
1860
1861 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1862 {
1863         struct packet_command cgc;
1864         char buffer[16];
1865         int stat;
1866         char spindown;
1867
1868         if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1869                 return -EFAULT;
1870
1871         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1872
1873         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1874         if (stat)
1875                 return stat;
1876
1877         buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1878         return cdrom_mode_select(cdi, &cgc);
1879 }
1880
1881 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1882 {
1883         struct packet_command cgc;
1884         char buffer[16];
1885         int stat;
1886         char spindown;
1887
1888         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1889
1890         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1891         if (stat)
1892                 return stat;
1893
1894         spindown = buffer[11] & 0x0f;
1895         if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1896                 return -EFAULT;
1897         return 0;
1898 }
1899
1900 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1901                         unsigned int cmd, unsigned long arg)
1902 {
1903         struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1904         int err;
1905
1906         switch (cmd) {
1907         case CDROMSETSPINDOWN:
1908                 return idecd_set_spindown(&info->devinfo, arg);
1909         case CDROMGETSPINDOWN:
1910                 return idecd_get_spindown(&info->devinfo, arg);
1911         default:
1912                 break;
1913         }
1914
1915         err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1916         if (err == -EINVAL)
1917                 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
1918
1919         return err;
1920 }
1921
1922 static int idecd_media_changed(struct gendisk *disk)
1923 {
1924         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1925         return cdrom_media_changed(&info->devinfo);
1926 }
1927
1928 static int idecd_revalidate_disk(struct gendisk *disk)
1929 {
1930         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1931         struct request_sense sense;
1932
1933         ide_cd_read_toc(info->drive, &sense);
1934
1935         return  0;
1936 }
1937
1938 static struct block_device_operations idecd_ops = {
1939         .owner                  = THIS_MODULE,
1940         .open                   = idecd_open,
1941         .release                = idecd_release,
1942         .locked_ioctl           = idecd_ioctl,
1943         .media_changed          = idecd_media_changed,
1944         .revalidate_disk        = idecd_revalidate_disk
1945 };
1946
1947 /* module options */
1948 static unsigned long debug_mask;
1949 module_param(debug_mask, ulong, 0644);
1950
1951 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1952
1953 static int ide_cd_probe(ide_drive_t *drive)
1954 {
1955         struct cdrom_info *info;
1956         struct gendisk *g;
1957         struct request_sense sense;
1958
1959         ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x",
1960                                      drive->driver_req, drive->media);
1961
1962         if (!strstr("ide-cdrom", drive->driver_req))
1963                 goto failed;
1964
1965         if (drive->media != ide_cdrom && drive->media != ide_optical)
1966                 goto failed;
1967
1968         drive->debug_mask = debug_mask;
1969         drive->irq_handler = cdrom_newpc_intr;
1970
1971         info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
1972         if (info == NULL) {
1973                 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
1974                                 drive->name);
1975                 goto failed;
1976         }
1977
1978         g = alloc_disk(1 << PARTN_BITS);
1979         if (!g)
1980                 goto out_free_cd;
1981
1982         ide_init_disk(g, drive);
1983
1984         info->dev.parent = &drive->gendev;
1985         info->dev.release = ide_cd_release;
1986         dev_set_name(&info->dev, dev_name(&drive->gendev));
1987
1988         if (device_register(&info->dev))
1989                 goto out_free_disk;
1990
1991         info->drive = drive;
1992         info->driver = &ide_cdrom_driver;
1993         info->disk = g;
1994
1995         g->private_data = &info->driver;
1996
1997         drive->driver_data = info;
1998
1999         g->minors = 1;
2000         g->driverfs_dev = &drive->gendev;
2001         g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
2002         if (ide_cdrom_setup(drive)) {
2003                 put_device(&info->dev);
2004                 goto failed;
2005         }
2006
2007         ide_cd_read_toc(drive, &sense);
2008         g->fops = &idecd_ops;
2009         g->flags |= GENHD_FL_REMOVABLE;
2010         add_disk(g);
2011         return 0;
2012
2013 out_free_disk:
2014         put_disk(g);
2015 out_free_cd:
2016         kfree(info);
2017 failed:
2018         return -ENODEV;
2019 }
2020
2021 static void __exit ide_cdrom_exit(void)
2022 {
2023         driver_unregister(&ide_cdrom_driver.gen_driver);
2024 }
2025
2026 static int __init ide_cdrom_init(void)
2027 {
2028         printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
2029         return driver_register(&ide_cdrom_driver.gen_driver);
2030 }
2031
2032 MODULE_ALIAS("ide:*m-cdrom*");
2033 MODULE_ALIAS("ide-cd");
2034 module_init(ide_cdrom_init);
2035 module_exit(ide_cdrom_exit);
2036 MODULE_LICENSE("GPL");