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 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                                 return ide_stopped;
 599                         }
 600                         rq->current_nr_sectors += nskip;
 601                 }
 602         }
 603
 604         /* set up the command */
 605         rq->timeout = ATAPI_WAIT_PC;
 606
 607         return ide_started;
 608 }
 609
 610 /*
 611  * Fix up a possibly partially-processed request so that we can start it over
 612  * entirely, or even put it back on the request queue.
 613  */
 614 static void ide_cd_restore_request(ide_drive_t *drive, struct request *rq)
 615 {
 616
 617         ide_debug_log(IDE_DBG_FUNC, "enter");
 618
 619         if (rq->buffer != bio_data(rq->bio)) {
 620                 sector_t n =
 621                         (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE;
 622
 623                 rq->buffer = bio_data(rq->bio);
 624                 rq->nr_sectors += n;
 625                 rq->sector -= n;
 626         }
 627         rq->current_nr_sectors = bio_cur_sectors(rq->bio);
 628         rq->hard_cur_sectors = rq->current_nr_sectors;
 629         rq->hard_nr_sectors = rq->nr_sectors;
 630         rq->hard_sector = rq->sector;
 631         rq->q->prep_rq_fn(rq->q, rq);
 632 }
 633
 634 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct request *rq)
 635 {
 636         ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]);
 637
 638         /*
 639          * Some of the trailing request sense fields are optional,
 640          * and some drives don't send them.  Sigh.
 641          */
 642         if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
 643             rq->data_len > 0 && rq->data_len <= 5)
 644                 while (rq->data_len > 0) {
 645                         *(u8 *)rq->data++ = 0;
 646                         --rq->data_len;
 647                 }
 648 }
 649
 650 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
 651                     int write, void *buffer, unsigned *bufflen,
 652                     struct request_sense *sense, int timeout,
 653                     unsigned int cmd_flags)
 654 {
 655         struct cdrom_info *info = drive->driver_data;
 656         struct request_sense local_sense;
 657         int retries = 10;
 658         unsigned int flags = 0;
 659
 660         if (!sense)
 661                 sense = &local_sense;
 662
 663         ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, "
 664                                   "cmd_flags: 0x%x",
 665                                   cmd[0], write, timeout, cmd_flags);
 666
 667         /* start of retry loop */
 668         do {
 669                 struct request *rq;
 670                 int error;
 671
 672                 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
 673
 674                 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
 675                 rq->cmd_type = REQ_TYPE_ATA_PC;
 676                 rq->sense = sense;
 677                 rq->cmd_flags |= cmd_flags;
 678                 rq->timeout = timeout;
 679                 if (buffer) {
 680                         rq->data = buffer;
 681                         rq->data_len = *bufflen;
 682                 }
 683
 684                 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
 685
 686                 if (buffer)
 687                         *bufflen = rq->data_len;
 688
 689                 flags = rq->cmd_flags;
 690                 blk_put_request(rq);
 691
 692                 /*
 693                  * FIXME: we should probably abort/retry or something in case of
 694                  * failure.
 695                  */
 696                 if (flags & REQ_FAILED) {
 697                         /*
 698                          * The request failed.  Retry if it was due to a unit
 699                          * attention status (usually means media was changed).
 700                          */
 701                         struct request_sense *reqbuf = sense;
 702
 703                         if (reqbuf->sense_key == UNIT_ATTENTION)
 704                                 cdrom_saw_media_change(drive);
 705                         else if (reqbuf->sense_key == NOT_READY &&
 706                                  reqbuf->asc == 4 && reqbuf->ascq != 4) {
 707                                 /*
 708                                  * The drive is in the process of loading
 709                                  * a disk.  Retry, but wait a little to give
 710                                  * the drive time to complete the load.
 711                                  */
 712                                 ssleep(2);
 713                         } else {
 714                                 /* otherwise, don't retry */
 715                                 retries = 0;
 716                         }
 717                         --retries;
 718                 }
 719
 720                 /* end of retry loop */
 721         } while ((flags & REQ_FAILED) && retries >= 0);
 722
 723         /* return an error if the command failed */
 724         return (flags & REQ_FAILED) ? -EIO : 0;
 725 }
 726
 727 /*
 728  * Called from blk_end_request_callback() after the data of the request is
 729  * completed and before the request itself is completed. By returning value '1',
 730  * blk_end_request_callback() returns immediately without completing it.
 731  */
 732 static int cdrom_newpc_intr_dummy_cb(struct request *rq)
 733 {
 734         return 1;
 735 }
 736
 737 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 738 {
 739         ide_hwif_t *hwif = drive->hwif;
 740         struct request *rq = hwif->rq;
 741         xfer_func_t *xferfunc;
 742         ide_expiry_t *expiry = NULL;
 743         int dma_error = 0, dma, stat, thislen, uptodate = 0;
 744         int write = (rq_data_dir(rq) == WRITE) ? 1 : 0;
 745         unsigned int timeout;
 746         u16 len;
 747         u8 ireason;
 748
 749         ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x",
 750                                   rq->cmd[0], write);
 751
 752         /* check for errors */
 753         dma = drive->dma;
 754         if (dma) {
 755                 drive->dma = 0;
 756                 dma_error = hwif->dma_ops->dma_end(drive);
 757                 if (dma_error) {
 758                         printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
 759                                         write ? "write" : "read");
 760                         ide_dma_off(drive);
 761                 }
 762         }
 763
 764         if (cdrom_decode_status(drive, 0, &stat))
 765                 return ide_stopped;
 766
 767         /* using dma, transfer is complete now */
 768         if (dma) {
 769                 if (dma_error)
 770                         return ide_error(drive, "dma error", stat);
 771                 if (blk_fs_request(rq)) {
 772                         ide_complete_rq(drive, 0, rq->nr_sectors
 773                                 ? (rq->nr_sectors << 9) : ide_rq_bytes(rq));
 774                         return ide_stopped;
 775                 } else if (rq->cmd_type == REQ_TYPE_ATA_PC && !rq->bio) {
 776                         ide_complete_rq(drive, 0, 512);
 777                         return ide_stopped;
 778                 }
 779                 if (blk_pc_request(rq) == 0 && uptodate == 0)
 780                         rq->cmd_flags |= REQ_FAILED;
 781                 goto out_end;
 782         }
 783
 784         ide_read_bcount_and_ireason(drive, &len, &ireason);
 785
 786         thislen = blk_fs_request(rq) ? len : rq->data_len;
 787         if (thislen > len)
 788                 thislen = len;
 789
 790         ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d",
 791                                   stat, thislen);
 792
 793         /* If DRQ is clear, the command has completed. */
 794         if ((stat & ATA_DRQ) == 0) {
 795                 if (blk_fs_request(rq)) {
 796                         /*
 797                          * If we're not done reading/writing, complain.
 798                          * Otherwise, complete the command normally.
 799                          */
 800                         uptodate = 1;
 801                         if (rq->current_nr_sectors > 0) {
 802                                 printk(KERN_ERR PFX "%s: %s: data underrun "
 803                                                 "(%d blocks)\n",
 804                                                 drive->name, __func__,
 805                                                 rq->current_nr_sectors);
 806                                 if (!write)
 807                                         rq->cmd_flags |= REQ_FAILED;
 808                                 uptodate = 0;
 809                         }
 810                         cdrom_end_request(drive, uptodate);
 811                         return ide_stopped;
 812                 } else if (!blk_pc_request(rq)) {
 813                         ide_cd_request_sense_fixup(drive, rq);
 814                         /* complain if we still have data left to transfer */
 815                         uptodate = rq->data_len ? 0 : 1;
 816                         if (uptodate == 0)
 817                                 rq->cmd_flags |= REQ_FAILED;
 818                 }
 819                 goto out_end;
 820         }
 821
 822         /* check which way to transfer data */
 823         if (ide_cd_check_ireason(drive, rq, len, ireason, write))
 824                 return ide_stopped;
 825
 826         if (blk_fs_request(rq)) {
 827                 if (write == 0) {
 828                         int nskip;
 829
 830                         if (ide_cd_check_transfer_size(drive, len)) {
 831                                 cdrom_end_request(drive, 0);
 832                                 return ide_stopped;
 833                         }
 834
 835                         /*
 836                          * First, figure out if we need to bit-bucket
 837                          * any of the leading sectors.
 838                          */
 839                         nskip = min_t(int, rq->current_nr_sectors
 840                                            - bio_cur_sectors(rq->bio),
 841                                            thislen >> 9);
 842                         if (nskip > 0) {
 843                                 ide_pad_transfer(drive, write, nskip << 9);
 844                                 rq->current_nr_sectors -= nskip;
 845                                 thislen -= (nskip << 9);
 846                         }
 847                 }
 848         }
 849
 850         if (ireason == 0) {
 851                 write = 1;
 852                 xferfunc = hwif->tp_ops->output_data;
 853         } else {
 854                 write = 0;
 855                 xferfunc = hwif->tp_ops->input_data;
 856         }
 857
 858         ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, "
 859                                   "ireason: 0x%x",
 860                                   rq->cmd_type, ireason);
 861
 862         /* transfer data */
 863         while (thislen > 0) {
 864                 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data;
 865                 int blen = rq->data_len;
 866
 867                 /* bio backed? */
 868                 if (rq->bio) {
 869                         if (blk_fs_request(rq)) {
 870                                 ptr = rq->buffer;
 871                                 blen = rq->current_nr_sectors << 9;
 872                         } else {
 873                                 ptr = bio_data(rq->bio);
 874                                 blen = bio_iovec(rq->bio)->bv_len;
 875                         }
 876                 }
 877
 878                 if (!ptr) {
 879                         if (blk_fs_request(rq) && !write)
 880                                 /*
 881                                  * If the buffers are full, pipe the rest into
 882                                  * oblivion.
 883                                  */
 884                                 ide_pad_transfer(drive, 0, thislen);
 885                         else {
 886                                 printk(KERN_ERR PFX "%s: confused, missing data\n",
 887                                                 drive->name);
 888                                 blk_dump_rq_flags(rq, rq_data_dir(rq)
 889                                                   ? "cdrom_newpc_intr, write"
 890                                                   : "cdrom_newpc_intr, read");
 891                         }
 892                         break;
 893                 }
 894
 895                 if (blen > thislen)
 896                         blen = thislen;
 897
 898                 xferfunc(drive, NULL, ptr, blen);
 899
 900                 thislen -= blen;
 901                 len -= blen;
 902
 903                 if (blk_fs_request(rq)) {
 904                         rq->buffer += blen;
 905                         rq->nr_sectors -= (blen >> 9);
 906                         rq->current_nr_sectors -= (blen >> 9);
 907                         rq->sector += (blen >> 9);
 908
 909                         if (rq->current_nr_sectors == 0 && rq->nr_sectors)
 910                                 cdrom_end_request(drive, 1);
 911                 } else {
 912                         rq->data_len -= blen;
 913
 914                         /*
 915                          * The request can't be completed until DRQ is cleared.
 916                          * So complete the data, but don't complete the request
 917                          * using the dummy function for the callback feature
 918                          * of blk_end_request_callback().
 919                          */
 920                         if (rq->bio)
 921                                 blk_end_request_callback(rq, 0, blen,
 922                                                  cdrom_newpc_intr_dummy_cb);
 923                         else
 924                                 rq->data += blen;
 925                 }
 926                 if (!write && blk_sense_request(rq))
 927                         rq->sense_len += blen;
 928         }
 929
 930         /* pad, if necessary */
 931         if (!blk_fs_request(rq) && len > 0)
 932                 ide_pad_transfer(drive, write, len);
 933
 934         if (blk_pc_request(rq)) {
 935                 timeout = rq->timeout;
 936         } else {
 937                 timeout = ATAPI_WAIT_PC;
 938                 if (!blk_fs_request(rq))
 939                         expiry = ide_cd_expiry;
 940         }
 941
 942         hwif->expiry = expiry;
 943         ide_set_handler(drive, cdrom_newpc_intr, timeout);
 944         return ide_started;
 945
 946 out_end:
 947         if (blk_pc_request(rq)) {
 948                 unsigned int dlen = rq->data_len;
 949
 950                 if (dma)
 951                         rq->data_len = 0;
 952
 953                 if (blk_end_request(rq, 0, dlen))
 954                         BUG();
 955
 956                 hwif->rq = NULL;
 957         } else {
 958                 cdrom_end_request(drive, uptodate);
 959         }
 960         return ide_stopped;
 961 }
 962
 963 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
 964 {
 965         struct cdrom_info *cd = drive->driver_data;
 966         int write = rq_data_dir(rq) == WRITE;
 967         unsigned short sectors_per_frame =
 968                 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
 969
 970         ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, write: 0x%x, "
 971                                   "secs_per_frame: %u",
 972                                   rq->cmd[0], write, sectors_per_frame);
 973
 974         if (write) {
 975                 /* disk has become write protected */
 976                 if (get_disk_ro(cd->disk))
 977                         return ide_stopped;
 978         } else {
 979                 /*
 980                  * We may be retrying this request after an error.  Fix up any
 981                  * weirdness which might be present in the request packet.
 982                  */
 983                 ide_cd_restore_request(drive, rq);
 984         }
 985
 986         /* use DMA, if possible / writes *must* be hardware frame aligned */
 987         if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
 988             (rq->sector & (sectors_per_frame - 1))) {
 989                 if (write)
 990                         return ide_stopped;
 991                 drive->dma = 0;
 992         } else
 993                 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
 994
 995         if (write)
 996                 cd->devinfo.media_written = 1;
 997
 998         return ide_started;
 999 }
1000
1001 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
1002 {
1003
1004         ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
1005                                   rq->cmd[0], rq->cmd_type);
1006
1007         if (blk_pc_request(rq))
1008                 rq->cmd_flags |= REQ_QUIET;
1009         else
1010                 rq->cmd_flags &= ~REQ_FAILED;
1011
1012         drive->dma = 0;
1013
1014         /* sg request */
1015         if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) {
1016                 struct request_queue *q = drive->queue;
1017                 unsigned int alignment;
1018                 char *buf;
1019
1020                 if (rq->bio)
1021                         buf = bio_data(rq->bio);
1022                 else
1023                         buf = rq->data;
1024
1025                 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1026
1027                 /*
1028                  * check if dma is safe
1029                  *
1030                  * NOTE! The "len" and "addr" checks should possibly have
1031                  * separate masks.
1032                  */
1033                 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
1034                 if ((unsigned long)buf & alignment
1035                     || rq->data_len & q->dma_pad_mask
1036                     || object_is_on_stack(buf))
1037                         drive->dma = 0;
1038         }
1039 }
1040
1041 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
1042                                         sector_t block)
1043 {
1044         struct ide_cmd cmd;
1045         int uptodate = 0;
1046
1047         ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
1048                                   rq->cmd[0], (unsigned long long)block);
1049
1050         if (drive->debug_mask & IDE_DBG_RQ)
1051                 blk_dump_rq_flags(rq, "ide_cd_do_request");
1052
1053         if (blk_fs_request(rq)) {
1054                 if (cdrom_start_rw(drive, rq) == ide_stopped ||
1055                     ide_cd_prepare_rw_request(drive, rq) == ide_stopped)
1056                         goto out_end;
1057         } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
1058                    rq->cmd_type == REQ_TYPE_ATA_PC) {
1059                 if (!rq->timeout)
1060                         rq->timeout = ATAPI_WAIT_PC;
1061
1062                 cdrom_do_block_pc(drive, rq);
1063         } else if (blk_special_request(rq)) {
1064                 /* right now this can only be a reset... */
1065                 uptodate = 1;
1066                 goto out_end;
1067         } else {
1068                 blk_dump_rq_flags(rq, DRV_NAME " bad flags");
1069                 goto out_end;
1070         }
1071
1072         memset(&cmd, 0, sizeof(cmd));
1073
1074         if (rq_data_dir(rq))
1075                 cmd.tf_flags |= IDE_TFLAG_WRITE;
1076
1077         cmd.rq = rq;
1078
1079         return ide_issue_pc(drive, &cmd);
1080 out_end:
1081         cdrom_end_request(drive, uptodate);
1082         return ide_stopped;
1083 }
1084
1085 /*
1086  * Ioctl handling.
1087  *
1088  * Routines which queue packet commands take as a final argument a pointer to a
1089  * request_sense struct. If execution of the command results in an error with a
1090  * CHECK CONDITION status, this structure will be filled with the results of the
1091  * subsequent request sense command. The pointer can also be NULL, in which case
1092  * no sense information is returned.
1093  */
1094 static void msf_from_bcd(struct atapi_msf *msf)
1095 {
1096         msf->minute = bcd2bin(msf->minute);
1097         msf->second = bcd2bin(msf->second);
1098         msf->frame  = bcd2bin(msf->frame);
1099 }
1100
1101 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
1102 {
1103         struct cdrom_info *info = drive->driver_data;
1104         struct cdrom_device_info *cdi = &info->devinfo;
1105         unsigned char cmd[BLK_MAX_CDB];
1106
1107         ide_debug_log(IDE_DBG_FUNC, "enter");
1108
1109         memset(cmd, 0, BLK_MAX_CDB);
1110         cmd[0] = GPCMD_TEST_UNIT_READY;
1111
1112         /*
1113          * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
1114          * instead of supporting the LOAD_UNLOAD opcode.
1115          */
1116         cmd[7] = cdi->sanyo_slot % 3;
1117
1118         return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
1119 }
1120
1121 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
1122                                unsigned long *sectors_per_frame,
1123                                struct request_sense *sense)
1124 {
1125         struct {
1126                 __be32 lba;
1127                 __be32 blocklen;
1128         } capbuf;
1129
1130         int stat;
1131         unsigned char cmd[BLK_MAX_CDB];
1132         unsigned len = sizeof(capbuf);
1133         u32 blocklen;
1134
1135         ide_debug_log(IDE_DBG_FUNC, "enter");
1136
1137         memset(cmd, 0, BLK_MAX_CDB);
1138         cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1139
1140         stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
1141                                REQ_QUIET);
1142         if (stat)
1143                 return stat;
1144
1145         /*
1146          * Sanity check the given block size
1147          */
1148         blocklen = be32_to_cpu(capbuf.blocklen);
1149         switch (blocklen) {
1150         case 512:
1151         case 1024:
1152         case 2048:
1153         case 4096:
1154                 break;
1155         default:
1156                 printk(KERN_ERR PFX "%s: weird block size %u\n",
1157                                 drive->name, blocklen);
1158                 printk(KERN_ERR PFX "%s: default to 2kb block size\n",
1159                                 drive->name);
1160                 blocklen = 2048;
1161                 break;
1162         }
1163
1164         *capacity = 1 + be32_to_cpu(capbuf.lba);
1165         *sectors_per_frame = blocklen >> SECTOR_BITS;
1166
1167         ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu",
1168                                      *capacity, *sectors_per_frame);
1169
1170         return 0;
1171 }
1172
1173 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1174                                 int format, char *buf, int buflen,
1175                                 struct request_sense *sense)
1176 {
1177         unsigned char cmd[BLK_MAX_CDB];
1178
1179         ide_debug_log(IDE_DBG_FUNC, "enter");
1180
1181         memset(cmd, 0, BLK_MAX_CDB);
1182
1183         cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1184         cmd[6] = trackno;
1185         cmd[7] = (buflen >> 8);
1186         cmd[8] = (buflen & 0xff);
1187         cmd[9] = (format << 6);
1188
1189         if (msf_flag)
1190                 cmd[1] = 2;
1191
1192         return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
1193 }
1194
1195 /* Try to read the entire TOC for the disk into our internal buffer. */
1196 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1197 {
1198         int stat, ntracks, i;
1199         struct cdrom_info *info = drive->driver_data;
1200         struct cdrom_device_info *cdi = &info->devinfo;
1201         struct atapi_toc *toc = info->toc;
1202         struct {
1203                 struct atapi_toc_header hdr;
1204                 struct atapi_toc_entry  ent;
1205         } ms_tmp;
1206         long last_written;
1207         unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1208
1209         ide_debug_log(IDE_DBG_FUNC, "enter");
1210
1211         if (toc == NULL) {
1212                 /* try to allocate space */
1213                 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1214                 if (toc == NULL) {
1215                         printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
1216                                         drive->name);
1217                         return -ENOMEM;
1218                 }
1219                 info->toc = toc;
1220         }
1221
1222         /*
1223          * Check to see if the existing data is still valid. If it is,
1224          * just return.
1225          */
1226         (void) cdrom_check_status(drive, sense);
1227
1228         if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
1229                 return 0;
1230
1231         /* try to get the total cdrom capacity and sector size */
1232         stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1233                                    sense);
1234         if (stat)
1235                 toc->capacity = 0x1fffff;
1236
1237         set_capacity(info->disk, toc->capacity * sectors_per_frame);
1238         /* save a private copy of the TOC capacity for error handling */
1239         drive->probed_capacity = toc->capacity * sectors_per_frame;
1240
1241         blk_queue_hardsect_size(drive->queue,
1242                                 sectors_per_frame << SECTOR_BITS);
1243
1244         /* first read just the header, so we know how long the TOC is */
1245         stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1246                                     sizeof(struct atapi_toc_header), sense);
1247         if (stat)
1248                 return stat;
1249
1250         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1251                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1252                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1253         }
1254
1255         ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1256         if (ntracks <= 0)
1257                 return -EIO;
1258         if (ntracks > MAX_TRACKS)
1259                 ntracks = MAX_TRACKS;
1260
1261         /* now read the whole schmeer */
1262         stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1263                                   (char *)&toc->hdr,
1264                                    sizeof(struct atapi_toc_header) +
1265                                    (ntracks + 1) *
1266                                    sizeof(struct atapi_toc_entry), sense);
1267
1268         if (stat && toc->hdr.first_track > 1) {
1269                 /*
1270                  * Cds with CDI tracks only don't have any TOC entries, despite
1271                  * of this the returned values are
1272                  * first_track == last_track = number of CDI tracks + 1,
1273                  * so that this case is indistinguishable from the same layout
1274                  * plus an additional audio track. If we get an error for the
1275                  * regular case, we assume a CDI without additional audio
1276                  * tracks. In this case the readable TOC is empty (CDI tracks
1277                  * are not included) and only holds the Leadout entry.
1278                  *
1279                  * Heiko Eißfeldt.
1280                  */
1281                 ntracks = 0;
1282                 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1283                                            (char *)&toc->hdr,
1284                                            sizeof(struct atapi_toc_header) +
1285                                            (ntracks + 1) *
1286                                            sizeof(struct atapi_toc_entry),
1287                                            sense);
1288                 if (stat)
1289                         return stat;
1290
1291                 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1292                         toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1293                         toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1294                 } else {
1295                         toc->hdr.first_track = CDROM_LEADOUT;
1296                         toc->hdr.last_track = CDROM_LEADOUT;
1297                 }
1298         }
1299
1300         if (stat)
1301                 return stat;
1302
1303         toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1304
1305         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1306                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1307                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1308         }
1309
1310         for (i = 0; i <= ntracks; i++) {
1311                 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1312                         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1313                                 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1314                         msf_from_bcd(&toc->ent[i].addr.msf);
1315                 }
1316                 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1317                                                   toc->ent[i].addr.msf.second,
1318                                                   toc->ent[i].addr.msf.frame);
1319         }
1320
1321         if (toc->hdr.first_track != CDROM_LEADOUT) {
1322                 /* read the multisession information */
1323                 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1324                                            sizeof(ms_tmp), sense);
1325                 if (stat)
1326                         return stat;
1327
1328                 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1329         } else {
1330                 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1331                 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1332                 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1333         }
1334
1335         if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1336                 /* re-read multisession information using MSF format */
1337                 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1338                                            sizeof(ms_tmp), sense);
1339                 if (stat)
1340                         return stat;
1341
1342                 msf_from_bcd(&ms_tmp.ent.addr.msf);
1343                 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1344                                                    ms_tmp.ent.addr.msf.second,
1345                                                    ms_tmp.ent.addr.msf.frame);
1346         }
1347
1348         toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1349
1350         /* now try to get the total cdrom capacity */
1351         stat = cdrom_get_last_written(cdi, &last_written);
1352         if (!stat && (last_written > toc->capacity)) {
1353                 toc->capacity = last_written;
1354                 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1355                 drive->probed_capacity = toc->capacity * sectors_per_frame;
1356         }
1357
1358         /* Remember that we've read this stuff. */
1359         drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1360
1361         return 0;
1362 }
1363
1364 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1365 {
1366         struct cdrom_info *info = drive->driver_data;
1367         struct cdrom_device_info *cdi = &info->devinfo;
1368         struct packet_command cgc;
1369         int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1370
1371         ide_debug_log(IDE_DBG_FUNC, "enter");
1372
1373         if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1374                 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1375
1376         init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1377         do {
1378                 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1379                 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1380                 if (!stat)
1381                         break;
1382         } while (--attempts);
1383         return stat;
1384 }
1385
1386 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1387 {
1388         struct cdrom_info *cd = drive->driver_data;
1389         u16 curspeed, maxspeed;
1390
1391         ide_debug_log(IDE_DBG_FUNC, "enter");
1392
1393         if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1394                 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1395                 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1396         } else {
1397                 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1398                 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1399         }
1400
1401         ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u",
1402                                      curspeed, maxspeed);
1403
1404         cd->current_speed = (curspeed + (176/2)) / 176;
1405         cd->max_speed = (maxspeed + (176/2)) / 176;
1406 }
1407
1408 #define IDE_CD_CAPABILITIES \
1409         (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1410          CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1411          CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1412          CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1413          CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1414
1415 static struct cdrom_device_ops ide_cdrom_dops = {
1416         .open                   = ide_cdrom_open_real,
1417         .release                = ide_cdrom_release_real,
1418         .drive_status           = ide_cdrom_drive_status,
1419         .media_changed          = ide_cdrom_check_media_change_real,
1420         .tray_move              = ide_cdrom_tray_move,
1421         .lock_door              = ide_cdrom_lock_door,
1422         .select_speed           = ide_cdrom_select_speed,
1423         .get_last_session       = ide_cdrom_get_last_session,
1424         .get_mcn                = ide_cdrom_get_mcn,
1425         .reset                  = ide_cdrom_reset,
1426         .audio_ioctl            = ide_cdrom_audio_ioctl,
1427         .capability             = IDE_CD_CAPABILITIES,
1428         .generic_packet         = ide_cdrom_packet,
1429 };
1430
1431 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1432 {
1433         struct cdrom_info *info = drive->driver_data;
1434         struct cdrom_device_info *devinfo = &info->devinfo;
1435
1436         ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots);
1437
1438         devinfo->ops = &ide_cdrom_dops;
1439         devinfo->speed = info->current_speed;
1440         devinfo->capacity = nslots;
1441         devinfo->handle = drive;
1442         strcpy(devinfo->name, drive->name);
1443
1444         if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1445                 devinfo->mask |= CDC_SELECT_SPEED;
1446
1447         devinfo->disk = info->disk;
1448         return register_cdrom(devinfo);
1449 }
1450
1451 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1452 {
1453         struct cdrom_info *cd = drive->driver_data;
1454         struct cdrom_device_info *cdi = &cd->devinfo;
1455         u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1456         mechtype_t mechtype;
1457         int nslots = 1;
1458
1459         ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx",
1460                                      drive->media, drive->atapi_flags);
1461
1462         cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1463                      CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1464                      CDC_MO_DRIVE | CDC_RAM);
1465
1466         if (drive->media == ide_optical) {
1467                 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1468                 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1469                                 drive->name);
1470                 return nslots;
1471         }
1472
1473         if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1474                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1475                 cdi->mask &= ~CDC_PLAY_AUDIO;
1476                 return nslots;
1477         }
1478
1479         /*
1480          * We have to cheat a little here. the packet will eventually be queued
1481          * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1482          * Since this device hasn't been registered with the Uniform layer yet,
1483          * it can't do this. Same goes for cdi->ops.
1484          */
1485         cdi->handle = drive;
1486         cdi->ops = &ide_cdrom_dops;
1487
1488         if (ide_cdrom_get_capabilities(drive, buf))
1489                 return 0;
1490
1491         if ((buf[8 + 6] & 0x01) == 0)
1492                 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1493         if (buf[8 + 6] & 0x08)
1494                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1495         if (buf[8 + 3] & 0x01)
1496                 cdi->mask &= ~CDC_CD_R;
1497         if (buf[8 + 3] & 0x02)
1498                 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1499         if (buf[8 + 2] & 0x38)
1500                 cdi->mask &= ~CDC_DVD;
1501         if (buf[8 + 3] & 0x20)
1502                 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1503         if (buf[8 + 3] & 0x10)
1504                 cdi->mask &= ~CDC_DVD_R;
1505         if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1506                 cdi->mask &= ~CDC_PLAY_AUDIO;
1507
1508         mechtype = buf[8 + 6] >> 5;
1509         if (mechtype == mechtype_caddy ||
1510             mechtype == mechtype_popup ||
1511             (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1512                 cdi->mask |= CDC_CLOSE_TRAY;
1513
1514         if (cdi->sanyo_slot > 0) {
1515                 cdi->mask &= ~CDC_SELECT_DISC;
1516                 nslots = 3;
1517         } else if (mechtype == mechtype_individual_changer ||
1518                    mechtype == mechtype_cartridge_changer) {
1519                 nslots = cdrom_number_of_slots(cdi);
1520                 if (nslots > 1)
1521                         cdi->mask &= ~CDC_SELECT_DISC;
1522         }
1523
1524         ide_cdrom_update_speed(drive, buf);
1525
1526         printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1527
1528         /* don't print speed if the drive reported 0 */
1529         if (cd->max_speed)
1530                 printk(KERN_CONT " %dX", cd->max_speed);
1531
1532         printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1533
1534         if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1535                 printk(KERN_CONT " DVD%s%s",
1536                                  (cdi->mask & CDC_DVD_R) ? "" : "-R",
1537                                  (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1538
1539         if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1540                 printk(KERN_CONT " CD%s%s",
1541                                  (cdi->mask & CDC_CD_R) ? "" : "-R",
1542                                  (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1543
1544         if ((cdi->mask & CDC_SELECT_DISC) == 0)
1545                 printk(KERN_CONT " changer w/%d slots", nslots);
1546         else
1547                 printk(KERN_CONT " drive");
1548
1549         printk(KERN_CONT ", %dkB Cache\n",
1550                          be16_to_cpup((__be16 *)&buf[8 + 12]));
1551
1552         return nslots;
1553 }
1554
1555 /* standard prep_rq_fn that builds 10 byte cmds */
1556 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1557 {
1558         int hard_sect = queue_hardsect_size(q);
1559         long block = (long)rq->hard_sector / (hard_sect >> 9);
1560         unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1561
1562         memset(rq->cmd, 0, BLK_MAX_CDB);
1563
1564         if (rq_data_dir(rq) == READ)
1565                 rq->cmd[0] = GPCMD_READ_10;
1566         else
1567                 rq->cmd[0] = GPCMD_WRITE_10;
1568
1569         /*
1570          * fill in lba
1571          */
1572         rq->cmd[2] = (block >> 24) & 0xff;
1573         rq->cmd[3] = (block >> 16) & 0xff;
1574         rq->cmd[4] = (block >>  8) & 0xff;
1575         rq->cmd[5] = block & 0xff;
1576
1577         /*
1578          * and transfer length
1579          */
1580         rq->cmd[7] = (blocks >> 8) & 0xff;
1581         rq->cmd[8] = blocks & 0xff;
1582         rq->cmd_len = 10;
1583         return BLKPREP_OK;
1584 }
1585
1586 /*
1587  * Most of the SCSI commands are supported directly by ATAPI devices.
1588  * This transform handles the few exceptions.
1589  */
1590 static int ide_cdrom_prep_pc(struct request *rq)
1591 {
1592         u8 *c = rq->cmd;
1593
1594         /* transform 6-byte read/write commands to the 10-byte version */
1595         if (c[0] == READ_6 || c[0] == WRITE_6) {
1596                 c[8] = c[4];
1597                 c[5] = c[3];
1598                 c[4] = c[2];
1599                 c[3] = c[1] & 0x1f;
1600                 c[2] = 0;
1601                 c[1] &= 0xe0;
1602                 c[0] += (READ_10 - READ_6);
1603                 rq->cmd_len = 10;
1604                 return BLKPREP_OK;
1605         }
1606
1607         /*
1608          * it's silly to pretend we understand 6-byte sense commands, just
1609          * reject with ILLEGAL_REQUEST and the caller should take the
1610          * appropriate action
1611          */
1612         if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1613                 rq->errors = ILLEGAL_REQUEST;
1614                 return BLKPREP_KILL;
1615         }
1616
1617         return BLKPREP_OK;
1618 }
1619
1620 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1621 {
1622         if (blk_fs_request(rq))
1623                 return ide_cdrom_prep_fs(q, rq);
1624         else if (blk_pc_request(rq))
1625                 return ide_cdrom_prep_pc(rq);
1626
1627         return 0;
1628 }
1629
1630 struct cd_list_entry {
1631         const char      *id_model;
1632         const char      *id_firmware;
1633         unsigned int    cd_flags;
1634 };
1635
1636 #ifdef CONFIG_IDE_PROC_FS
1637 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1638 {
1639         unsigned long capacity, sectors_per_frame;
1640
1641         if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1642                 return 0;
1643
1644         return capacity * sectors_per_frame;
1645 }
1646
1647 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1648                                         int count, int *eof, void *data)
1649 {
1650         ide_drive_t *drive = data;
1651         int len;
1652
1653         len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1654         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1655 }
1656
1657 static ide_proc_entry_t idecd_proc[] = {
1658         { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1659         { NULL, 0, NULL, NULL }
1660 };
1661
1662 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1663 {
1664         return idecd_proc;
1665 }
1666
1667 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1668 {
1669         return NULL;
1670 }
1671 #endif
1672
1673 static const struct cd_list_entry ide_cd_quirks_list[] = {
1674         /* Limit transfer size per interrupt. */
1675         { "SAMSUNG CD-ROM SCR-2430", NULL,   IDE_AFLAG_LIMIT_NFRAMES         },
1676         { "SAMSUNG CD-ROM SCR-2432", NULL,   IDE_AFLAG_LIMIT_NFRAMES         },
1677         /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1678         { "SAMSUNG CD-ROM SCR-3231", NULL,   IDE_AFLAG_NO_SPEED_SELECT       },
1679         /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1680         { "NEC CD-ROM DRIVE:260",    "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1681                                              IDE_AFLAG_PRE_ATAPI12,          },
1682         /* Vertos 300, some versions of this drive like to talk BCD. */
1683         { "V003S0DS",                NULL,   IDE_AFLAG_VERTOS_300_SSD,       },
1684         /* Vertos 600 ESD. */
1685         { "V006E0DS",                NULL,   IDE_AFLAG_VERTOS_600_ESD,       },
1686         /*
1687          * Sanyo 3 CD changer uses a non-standard command for CD changing
1688          * (by default standard ATAPI support for CD changers is used).
1689          */
1690         { "CD-ROM CDR-C3 G",         NULL,   IDE_AFLAG_SANYO_3CD             },
1691         { "CD-ROM CDR-C3G",          NULL,   IDE_AFLAG_SANYO_3CD             },
1692         { "CD-ROM CDR_C36",          NULL,   IDE_AFLAG_SANYO_3CD             },
1693         /* Stingray 8X CD-ROM. */
1694         { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1695         /*
1696          * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1697          * mode sense page capabilities size, but older drives break.
1698          */
1699         { "ATAPI CD ROM DRIVE 50X MAX", NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1700         { "WPI CDS-32X",                NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1701         /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1702         { "",                        "241N", IDE_AFLAG_LE_SPEED_FIELDS       },
1703         /*
1704          * Some drives used by Apple don't advertise audio play
1705          * but they do support reading TOC & audio datas.
1706          */
1707         { "MATSHITADVD-ROM SR-8187", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1708         { "MATSHITADVD-ROM SR-8186", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1709         { "MATSHITADVD-ROM SR-8176", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1710         { "MATSHITADVD-ROM SR-8174", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1711         { "Optiarc DVD RW AD-5200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1712         { "Optiarc DVD RW AD-7200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1713         { "Optiarc DVD RW AD-7543A", NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1714         { "TEAC CD-ROM CD-224E",     NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1715         { NULL, NULL, 0 }
1716 };
1717
1718 static unsigned int ide_cd_flags(u16 *id)
1719 {
1720         const struct cd_list_entry *cle = ide_cd_quirks_list;
1721
1722         while (cle->id_model) {
1723                 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1724                     (cle->id_firmware == NULL ||
1725                      strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1726                         return cle->cd_flags;
1727                 cle++;
1728         }
1729
1730         return 0;
1731 }
1732
1733 static int ide_cdrom_setup(ide_drive_t *drive)
1734 {
1735         struct cdrom_info *cd = drive->driver_data;
1736         struct cdrom_device_info *cdi = &cd->devinfo;
1737         u16 *id = drive->id;
1738         char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1739         int nslots;
1740
1741         ide_debug_log(IDE_DBG_PROBE, "enter");
1742
1743         blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
1744         blk_queue_dma_alignment(drive->queue, 31);
1745         blk_queue_update_dma_pad(drive->queue, 15);
1746         drive->queue->unplug_delay = (1 * HZ) / 1000;
1747         if (!drive->queue->unplug_delay)
1748                 drive->queue->unplug_delay = 1;
1749
1750         drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1751         drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1752
1753         if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1754             fw_rev[4] == '1' && fw_rev[6] <= '2')
1755                 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1756                                      IDE_AFLAG_TOCADDR_AS_BCD);
1757         else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1758                  fw_rev[4] == '1' && fw_rev[6] <= '2')
1759                 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1760         else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1761                 /* 3 => use CD in slot 0 */
1762                 cdi->sanyo_slot = 3;
1763
1764         nslots = ide_cdrom_probe_capabilities(drive);
1765
1766         /* set correct block size */
1767         blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
1768
1769         if (ide_cdrom_register(drive, nslots)) {
1770                 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1771                                 " cdrom driver.\n", drive->name, __func__);
1772                 cd->devinfo.handle = NULL;
1773                 return 1;
1774         }
1775
1776         ide_proc_register_driver(drive, cd->driver);
1777         return 0;
1778 }
1779
1780 static void ide_cd_remove(ide_drive_t *drive)
1781 {
1782         struct cdrom_info *info = drive->driver_data;
1783
1784         ide_debug_log(IDE_DBG_FUNC, "enter");
1785
1786         ide_proc_unregister_driver(drive, info->driver);
1787         device_del(&info->dev);
1788         del_gendisk(info->disk);
1789
1790         mutex_lock(&idecd_ref_mutex);
1791         put_device(&info->dev);
1792         mutex_unlock(&idecd_ref_mutex);
1793 }
1794
1795 static void ide_cd_release(struct device *dev)
1796 {
1797         struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
1798         struct cdrom_device_info *devinfo = &info->devinfo;
1799         ide_drive_t *drive = info->drive;
1800         struct gendisk *g = info->disk;
1801
1802         ide_debug_log(IDE_DBG_FUNC, "enter");
1803
1804         kfree(info->toc);
1805         if (devinfo->handle == drive)
1806                 unregister_cdrom(devinfo);
1807         drive->driver_data = NULL;
1808         blk_queue_prep_rq(drive->queue, NULL);
1809         g->private_data = NULL;
1810         put_disk(g);
1811         kfree(info);
1812 }
1813
1814 static int ide_cd_probe(ide_drive_t *);
1815
1816 static struct ide_driver ide_cdrom_driver = {
1817         .gen_driver = {
1818                 .owner          = THIS_MODULE,
1819                 .name           = "ide-cdrom",
1820                 .bus            = &ide_bus_type,
1821         },
1822         .probe                  = ide_cd_probe,
1823         .remove                 = ide_cd_remove,
1824         .version                = IDECD_VERSION,
1825         .do_request             = ide_cd_do_request,
1826 #ifdef CONFIG_IDE_PROC_FS
1827         .proc_entries           = ide_cd_proc_entries,
1828         .proc_devsets           = ide_cd_proc_devsets,
1829 #endif
1830 };
1831
1832 static int idecd_open(struct block_device *bdev, fmode_t mode)
1833 {
1834         struct cdrom_info *info = ide_cd_get(bdev->bd_disk);
1835         int rc = -ENOMEM;
1836
1837         if (!info)
1838                 return -ENXIO;
1839
1840         rc = cdrom_open(&info->devinfo, bdev, mode);
1841
1842         if (rc < 0)
1843                 ide_cd_put(info);
1844
1845         return rc;
1846 }
1847
1848 static int idecd_release(struct gendisk *disk, fmode_t mode)
1849 {
1850         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1851
1852         cdrom_release(&info->devinfo, mode);
1853
1854         ide_cd_put(info);
1855
1856         return 0;
1857 }
1858
1859 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1860 {
1861         struct packet_command cgc;
1862         char buffer[16];
1863         int stat;
1864         char spindown;
1865
1866         if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1867                 return -EFAULT;
1868
1869         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1870
1871         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1872         if (stat)
1873                 return stat;
1874
1875         buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1876         return cdrom_mode_select(cdi, &cgc);
1877 }
1878
1879 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1880 {
1881         struct packet_command cgc;
1882         char buffer[16];
1883         int stat;
1884         char spindown;
1885
1886         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1887
1888         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1889         if (stat)
1890                 return stat;
1891
1892         spindown = buffer[11] & 0x0f;
1893         if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1894                 return -EFAULT;
1895         return 0;
1896 }
1897
1898 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1899                         unsigned int cmd, unsigned long arg)
1900 {
1901         struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1902         int err;
1903
1904         switch (cmd) {
1905         case CDROMSETSPINDOWN:
1906                 return idecd_set_spindown(&info->devinfo, arg);
1907         case CDROMGETSPINDOWN:
1908                 return idecd_get_spindown(&info->devinfo, arg);
1909         default:
1910                 break;
1911         }
1912
1913         err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1914         if (err == -EINVAL)
1915                 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
1916
1917         return err;
1918 }
1919
1920 static int idecd_media_changed(struct gendisk *disk)
1921 {
1922         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1923         return cdrom_media_changed(&info->devinfo);
1924 }
1925
1926 static int idecd_revalidate_disk(struct gendisk *disk)
1927 {
1928         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1929         struct request_sense sense;
1930
1931         ide_cd_read_toc(info->drive, &sense);
1932
1933         return  0;
1934 }
1935
1936 static struct block_device_operations idecd_ops = {
1937         .owner                  = THIS_MODULE,
1938         .open                   = idecd_open,
1939         .release                = idecd_release,
1940         .locked_ioctl           = idecd_ioctl,
1941         .media_changed          = idecd_media_changed,
1942         .revalidate_disk        = idecd_revalidate_disk
1943 };
1944
1945 /* module options */
1946 static unsigned long debug_mask;
1947 module_param(debug_mask, ulong, 0644);
1948
1949 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1950
1951 static int ide_cd_probe(ide_drive_t *drive)
1952 {
1953         struct cdrom_info *info;
1954         struct gendisk *g;
1955         struct request_sense sense;
1956
1957         ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x",
1958                                      drive->driver_req, drive->media);
1959
1960         if (!strstr("ide-cdrom", drive->driver_req))
1961                 goto failed;
1962
1963         if (drive->media != ide_cdrom && drive->media != ide_optical)
1964                 goto failed;
1965
1966         drive->debug_mask = debug_mask;
1967         drive->irq_handler = cdrom_newpc_intr;
1968
1969         info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
1970         if (info == NULL) {
1971                 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
1972                                 drive->name);
1973                 goto failed;
1974         }
1975
1976         g = alloc_disk(1 << PARTN_BITS);
1977         if (!g)
1978                 goto out_free_cd;
1979
1980         ide_init_disk(g, drive);
1981
1982         info->dev.parent = &drive->gendev;
1983         info->dev.release = ide_cd_release;
1984         dev_set_name(&info->dev, dev_name(&drive->gendev));
1985
1986         if (device_register(&info->dev))
1987                 goto out_free_disk;
1988
1989         info->drive = drive;
1990         info->driver = &ide_cdrom_driver;
1991         info->disk = g;
1992
1993         g->private_data = &info->driver;
1994
1995         drive->driver_data = info;
1996
1997         g->minors = 1;
1998         g->driverfs_dev = &drive->gendev;
1999         g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
2000         if (ide_cdrom_setup(drive)) {
2001                 put_device(&info->dev);
2002                 goto failed;
2003         }
2004
2005         ide_cd_read_toc(drive, &sense);
2006         g->fops = &idecd_ops;
2007         g->flags |= GENHD_FL_REMOVABLE;
2008         add_disk(g);
2009         return 0;
2010
2011 out_free_disk:
2012         put_disk(g);
2013 out_free_cd:
2014         kfree(info);
2015 failed:
2016         return -ENODEV;
2017 }
2018
2019 static void __exit ide_cdrom_exit(void)
2020 {
2021         driver_unregister(&ide_cdrom_driver.gen_driver);
2022 }
2023
2024 static int __init ide_cdrom_init(void)
2025 {
2026         printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
2027         return driver_register(&ide_cdrom_driver.gen_driver);
2028 }
2029
2030 MODULE_ALIAS("ide:*m-cdrom*");
2031 MODULE_ALIAS("ide-cd");
2032 module_init(ide_cdrom_init);
2033 module_exit(ide_cdrom_exit);
2034 MODULE_LICENSE("GPL");