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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 cdrom_end_request(ide_drive_t *drive, int uptodate)
 246 {
 247         struct request *rq = drive->hwif->rq;
 248         int nsectors = rq->hard_cur_sectors;
 249
 250         ide_debug_log(IDE_DBG_FUNC, "cmd: 0x%x, uptodate: 0x%x, nsectors: %d",
 251                                     rq->cmd[0], uptodate, nsectors);
 252
 253         if (blk_sense_request(rq) && uptodate) {
 254                 /*
 255                  * For REQ_TYPE_SENSE, "rq->buffer" points to the original
 256                  * failed request
 257                  */
 258                 struct request *failed = (struct request *) rq->buffer;
 259                 struct cdrom_info *info = drive->driver_data;
 260                 void *sense = &info->sense_data;
 261
 262                 if (failed) {
 263                         if (failed->sense) {
 264                                 sense = failed->sense;
 265                                 failed->sense_len = rq->sense_len;
 266                         }
 267                         cdrom_analyze_sense_data(drive, failed, sense);
 268
 269                         if (ide_end_rq(drive, failed, -EIO,
 270                                        blk_rq_bytes(failed)))
 271                                 BUG();
 272                 } else
 273                         cdrom_analyze_sense_data(drive, NULL, sense);
 274         }
 275
 276         if (!rq->current_nr_sectors && blk_fs_request(rq))
 277                 uptodate = 1;
 278         /* make sure it's fully ended */
 279         if (blk_pc_request(rq))
 280                 nsectors = (rq->data_len + 511) >> 9;
 281         if (!nsectors)
 282                 nsectors = 1;
 283
 284         ide_debug_log(IDE_DBG_FUNC, "uptodate: 0x%x, nsectors: %d",
 285                                     uptodate, nsectors);
 286
 287         if (blk_fs_request(rq) == 0 && uptodate <= 0 && rq->errors == 0)
 288                 rq->errors = -EIO;
 289
 290         ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
 291 }
 292
 293 static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 st)
 294 {
 295         if (st & 0x80)
 296                 return;
 297         ide_dump_status(drive, msg, st);
 298 }
 299
 300 /*
 301  * Returns:
 302  * 0: if the request should be continued.
 303  * 1: if the request was ended.
 304  */
 305 static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
 306 {
 307         ide_hwif_t *hwif = drive->hwif;
 308         struct request *rq = hwif->rq;
 309         int stat, err, sense_key;
 310
 311         /* check for errors */
 312         stat = hwif->tp_ops->read_status(hwif);
 313
 314         if (stat_ret)
 315                 *stat_ret = stat;
 316
 317         if (OK_STAT(stat, good_stat, BAD_R_STAT))
 318                 return 0;
 319
 320         /* get the IDE error register */
 321         err = ide_read_error(drive);
 322         sense_key = err >> 4;
 323
 324         ide_debug_log(IDE_DBG_RQ, "stat: 0x%x, good_stat: 0x%x, cmd[0]: 0x%x, "
 325                                   "rq->cmd_type: 0x%x, err: 0x%x",
 326                                   stat, good_stat, rq->cmd[0], rq->cmd_type,
 327                                   err);
 328
 329         if (blk_sense_request(rq)) {
 330                 /*
 331                  * We got an error trying to get sense info from the drive
 332                  * (probably while trying to recover from a former error).
 333                  * Just give up.
 334                  */
 335                 rq->cmd_flags |= REQ_FAILED;
 336                 cdrom_end_request(drive, 0);
 337                 ide_error(drive, "request sense failure", stat);
 338                 return 1;
 339
 340         } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) {
 341                 /* All other functions, except for READ. */
 342
 343                 /*
 344                  * if we have an error, pass back CHECK_CONDITION as the
 345                  * scsi status byte
 346                  */
 347                 if (blk_pc_request(rq) && !rq->errors)
 348                         rq->errors = SAM_STAT_CHECK_CONDITION;
 349
 350                 /* check for tray open */
 351                 if (sense_key == NOT_READY) {
 352                         cdrom_saw_media_change(drive);
 353                 } else if (sense_key == UNIT_ATTENTION) {
 354                         /* check for media change */
 355                         cdrom_saw_media_change(drive);
 356                         return 0;
 357                 } else if (sense_key == ILLEGAL_REQUEST &&
 358                            rq->cmd[0] == GPCMD_START_STOP_UNIT) {
 359                         /*
 360                          * Don't print error message for this condition--
 361                          * SFF8090i indicates that 5/24/00 is the correct
 362                          * response to a request to close the tray if the
 363                          * drive doesn't have that capability.
 364                          * cdrom_log_sense() knows this!
 365                          */
 366                 } else if (!(rq->cmd_flags & REQ_QUIET)) {
 367                         /* otherwise, print an error */
 368                         ide_dump_status(drive, "packet command error", stat);
 369                 }
 370
 371                 rq->cmd_flags |= REQ_FAILED;
 372
 373                 /*
 374                  * instead of playing games with moving completions around,
 375                  * remove failed request completely and end it when the
 376                  * request sense has completed
 377                  */
 378                 goto end_request;
 379
 380         } else if (blk_fs_request(rq)) {
 381                 int do_end_request = 0;
 382
 383                 /* handle errors from READ and WRITE requests */
 384
 385                 if (blk_noretry_request(rq))
 386                         do_end_request = 1;
 387
 388                 if (sense_key == NOT_READY) {
 389                         /* tray open */
 390                         if (rq_data_dir(rq) == READ) {
 391                                 cdrom_saw_media_change(drive);
 392
 393                                 /* fail the request */
 394                                 printk(KERN_ERR PFX "%s: tray open\n",
 395                                                 drive->name);
 396                                 do_end_request = 1;
 397                         } else {
 398                                 struct cdrom_info *info = drive->driver_data;
 399
 400                                 /*
 401                                  * Allow the drive 5 seconds to recover, some
 402                                  * devices will return this error while flushing
 403                                  * data from cache.
 404                                  */
 405                                 if (!rq->errors)
 406                                         info->write_timeout = jiffies +
 407                                                         ATAPI_WAIT_WRITE_BUSY;
 408                                 rq->errors = 1;
 409                                 if (time_after(jiffies, info->write_timeout))
 410                                         do_end_request = 1;
 411                                 else {
 412                                         struct request_queue *q = drive->queue;
 413                                         unsigned long flags;
 414
 415                                         /*
 416                                          * take a breather relying on the unplug
 417                                          * timer to kick us again
 418                                          */
 419                                         spin_lock_irqsave(q->queue_lock, flags);
 420                                         blk_plug_device(q);
 421                                         spin_unlock_irqrestore(q->queue_lock, flags);
 422
 423                                         return 1;
 424                                 }
 425                         }
 426                 } else if (sense_key == UNIT_ATTENTION) {
 427                         /* media change */
 428                         cdrom_saw_media_change(drive);
 429
 430                         /*
 431                          * Arrange to retry the request but be sure to give up
 432                          * if we've retried too many times.
 433                          */
 434                         if (++rq->errors > ERROR_MAX)
 435                                 do_end_request = 1;
 436                 } else if (sense_key == ILLEGAL_REQUEST ||
 437                            sense_key == DATA_PROTECT) {
 438                         /*
 439                          * No point in retrying after an illegal request or data
 440                          * protect error.
 441                          */
 442                         ide_dump_status_no_sense(drive, "command error", stat);
 443                         do_end_request = 1;
 444                 } else if (sense_key == MEDIUM_ERROR) {
 445                         /*
 446                          * No point in re-trying a zillion times on a bad
 447                          * sector. If we got here the error is not correctable.
 448                          */
 449                         ide_dump_status_no_sense(drive,
 450                                                  "media error (bad sector)",
 451                                                  stat);
 452                         do_end_request = 1;
 453                 } else if (sense_key == BLANK_CHECK) {
 454                         /* disk appears blank ?? */
 455                         ide_dump_status_no_sense(drive, "media error (blank)",
 456                                                  stat);
 457                         do_end_request = 1;
 458                 } else if ((err & ~ATA_ABORTED) != 0) {
 459                         /* go to the default handler for other errors */
 460                         ide_error(drive, "cdrom_decode_status", stat);
 461                         return 1;
 462                 } else if ((++rq->errors > ERROR_MAX)) {
 463                         /* we've racked up too many retries, abort */
 464                         do_end_request = 1;
 465                 }
 466
 467                 /*
 468                  * End a request through request sense analysis when we have
 469                  * sense data. We need this in order to perform end of media
 470                  * processing.
 471                  */
 472                 if (do_end_request)
 473                         goto end_request;
 474
 475                 /*
 476                  * If we got a CHECK_CONDITION status, queue
 477                  * a request sense command.
 478                  */
 479                 if (stat & ATA_ERR)
 480                         cdrom_queue_request_sense(drive, NULL, NULL);
 481         } else {
 482                 blk_dump_rq_flags(rq, PFX "bad rq");
 483                 cdrom_end_request(drive, 0);
 484         }
 485
 486         /* retry, or handle the next request */
 487         return 1;
 488
 489 end_request:
 490         if (stat & ATA_ERR) {
 491                 struct request_queue *q = drive->queue;
 492                 unsigned long flags;
 493
 494                 spin_lock_irqsave(q->queue_lock, flags);
 495                 blkdev_dequeue_request(rq);
 496                 spin_unlock_irqrestore(q->queue_lock, flags);
 497
 498                 hwif->rq = NULL;
 499
 500                 cdrom_queue_request_sense(drive, rq->sense, rq);
 501         } else
 502                 cdrom_end_request(drive, 0);
 503
 504         return 1;
 505 }
 506
 507 /*
 508  * Check the contents of the interrupt reason register from the cdrom
 509  * and attempt to recover if there are problems.  Returns  0 if everything's
 510  * ok; nonzero if the request has been terminated.
 511  */
 512 static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
 513                                 int len, int ireason, int rw)
 514 {
 515         ide_hwif_t *hwif = drive->hwif;
 516
 517         ide_debug_log(IDE_DBG_FUNC, "ireason: 0x%x, rw: 0x%x", ireason, rw);
 518
 519         /*
 520          * ireason == 0: the drive wants to receive data from us
 521          * ireason == 2: the drive is expecting to transfer data to us
 522          */
 523         if (ireason == (!rw << 1))
 524                 return 0;
 525         else if (ireason == (rw << 1)) {
 526
 527                 /* whoops... */
 528                 printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n",
 529                                 drive->name, __func__);
 530
 531                 ide_pad_transfer(drive, rw, len);
 532         } else  if (rw == 0 && ireason == 1) {
 533                 /*
 534                  * Some drives (ASUS) seem to tell us that status info is
 535                  * available.  Just get it and ignore.
 536                  */
 537                 (void)hwif->tp_ops->read_status(hwif);
 538                 return 0;
 539         } else {
 540                 /* drive wants a command packet, or invalid ireason... */
 541                 printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n",
 542                                 drive->name, __func__, ireason);
 543         }
 544
 545         if (rq->cmd_type == REQ_TYPE_ATA_PC)
 546                 rq->cmd_flags |= REQ_FAILED;
 547
 548         cdrom_end_request(drive, 0);
 549         return -1;
 550 }
 551
 552 /*
 553  * Assume that the drive will always provide data in multiples of at least
 554  * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise.
 555  */
 556 static int ide_cd_check_transfer_size(ide_drive_t *drive, int len)
 557 {
 558         ide_debug_log(IDE_DBG_FUNC, "len: %d", len);
 559
 560         if ((len % SECTOR_SIZE) == 0)
 561                 return 0;
 562
 563         printk(KERN_ERR PFX "%s: %s: Bad transfer size %d\n", drive->name,
 564                         __func__, len);
 565
 566         if (drive->atapi_flags & IDE_AFLAG_LIMIT_NFRAMES)
 567                 printk(KERN_ERR PFX "This drive is not supported by this "
 568                                 "version of the driver\n");
 569         else {
 570                 printk(KERN_ERR PFX "Trying to limit transfer sizes\n");
 571                 drive->atapi_flags |= IDE_AFLAG_LIMIT_NFRAMES;
 572         }
 573
 574         return 1;
 575 }
 576
 577 static ide_startstop_t ide_cd_prepare_rw_request(ide_drive_t *drive,
 578                                                  struct request *rq)
 579 {
 580         ide_debug_log(IDE_DBG_RQ, "rq->cmd_flags: 0x%x", rq->cmd_flags);
 581
 582         if (rq_data_dir(rq) == READ) {
 583                 unsigned short sectors_per_frame =
 584                         queue_hardsect_size(drive->queue) >> SECTOR_BITS;
 585                 int nskip = rq->sector & (sectors_per_frame - 1);
 586
 587                 /*
 588                  * If the requested sector doesn't start on a frame boundary,
 589                  * we must adjust the start of the transfer so that it does,
 590                  * and remember to skip the first few sectors.
 591                  *
 592                  * If the rq->current_nr_sectors field is larger than the size
 593                  * of the buffer, it will mean that we're to skip a number of
 594                  * sectors equal to the amount by which rq->current_nr_sectors
 595                  * is larger than the buffer size.
 596                  */
 597                 if (nskip > 0) {
 598                         /* sanity check... */
 599                         if (rq->current_nr_sectors !=
 600                             bio_cur_sectors(rq->bio)) {
 601                                 printk(KERN_ERR PFX "%s: %s: buffer botch (%u)\n",
 602                                                 drive->name, __func__,
 603                                                 rq->current_nr_sectors);
 604                                 cdrom_end_request(drive, 0);
 605                                 return ide_stopped;
 606                         }
 607                         rq->current_nr_sectors += nskip;
 608                 }
 609         }
 610
 611         /* set up the command */
 612         rq->timeout = ATAPI_WAIT_PC;
 613
 614         return ide_started;
 615 }
 616
 617 /*
 618  * Fix up a possibly partially-processed request so that we can start it over
 619  * entirely, or even put it back on the request queue.
 620  */
 621 static void ide_cd_restore_request(ide_drive_t *drive, struct request *rq)
 622 {
 623
 624         ide_debug_log(IDE_DBG_FUNC, "enter");
 625
 626         if (rq->buffer != bio_data(rq->bio)) {
 627                 sector_t n =
 628                         (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE;
 629
 630                 rq->buffer = bio_data(rq->bio);
 631                 rq->nr_sectors += n;
 632                 rq->sector -= n;
 633         }
 634         rq->current_nr_sectors = bio_cur_sectors(rq->bio);
 635         rq->hard_cur_sectors = rq->current_nr_sectors;
 636         rq->hard_nr_sectors = rq->nr_sectors;
 637         rq->hard_sector = rq->sector;
 638         rq->q->prep_rq_fn(rq->q, rq);
 639 }
 640
 641 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct request *rq)
 642 {
 643         ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]);
 644
 645         /*
 646          * Some of the trailing request sense fields are optional,
 647          * and some drives don't send them.  Sigh.
 648          */
 649         if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
 650             rq->data_len > 0 && rq->data_len <= 5)
 651                 while (rq->data_len > 0) {
 652                         *(u8 *)rq->data++ = 0;
 653                         --rq->data_len;
 654                 }
 655 }
 656
 657 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
 658                     int write, void *buffer, unsigned *bufflen,
 659                     struct request_sense *sense, int timeout,
 660                     unsigned int cmd_flags)
 661 {
 662         struct cdrom_info *info = drive->driver_data;
 663         struct request_sense local_sense;
 664         int retries = 10;
 665         unsigned int flags = 0;
 666
 667         if (!sense)
 668                 sense = &local_sense;
 669
 670         ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, "
 671                                   "cmd_flags: 0x%x",
 672                                   cmd[0], write, timeout, cmd_flags);
 673
 674         /* start of retry loop */
 675         do {
 676                 struct request *rq;
 677                 int error;
 678
 679                 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
 680
 681                 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
 682                 rq->cmd_type = REQ_TYPE_ATA_PC;
 683                 rq->sense = sense;
 684                 rq->cmd_flags |= cmd_flags;
 685                 rq->timeout = timeout;
 686                 if (buffer) {
 687                         rq->data = buffer;
 688                         rq->data_len = *bufflen;
 689                 }
 690
 691                 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
 692
 693                 if (buffer)
 694                         *bufflen = rq->data_len;
 695
 696                 flags = rq->cmd_flags;
 697                 blk_put_request(rq);
 698
 699                 /*
 700                  * FIXME: we should probably abort/retry or something in case of
 701                  * failure.
 702                  */
 703                 if (flags & REQ_FAILED) {
 704                         /*
 705                          * The request failed.  Retry if it was due to a unit
 706                          * attention status (usually means media was changed).
 707                          */
 708                         struct request_sense *reqbuf = sense;
 709
 710                         if (reqbuf->sense_key == UNIT_ATTENTION)
 711                                 cdrom_saw_media_change(drive);
 712                         else if (reqbuf->sense_key == NOT_READY &&
 713                                  reqbuf->asc == 4 && reqbuf->ascq != 4) {
 714                                 /*
 715                                  * The drive is in the process of loading
 716                                  * a disk.  Retry, but wait a little to give
 717                                  * the drive time to complete the load.
 718                                  */
 719                                 ssleep(2);
 720                         } else {
 721                                 /* otherwise, don't retry */
 722                                 retries = 0;
 723                         }
 724                         --retries;
 725                 }
 726
 727                 /* end of retry loop */
 728         } while ((flags & REQ_FAILED) && retries >= 0);
 729
 730         /* return an error if the command failed */
 731         return (flags & REQ_FAILED) ? -EIO : 0;
 732 }
 733
 734 /*
 735  * Called from blk_end_request_callback() after the data of the request is
 736  * completed and before the request itself is completed. By returning value '1',
 737  * blk_end_request_callback() returns immediately without completing it.
 738  */
 739 static int cdrom_newpc_intr_dummy_cb(struct request *rq)
 740 {
 741         return 1;
 742 }
 743
 744 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 745 {
 746         ide_hwif_t *hwif = drive->hwif;
 747         struct request *rq = hwif->rq;
 748         xfer_func_t *xferfunc;
 749         ide_expiry_t *expiry = NULL;
 750         int dma_error = 0, dma, stat, thislen, uptodate = 0;
 751         int write = (rq_data_dir(rq) == WRITE) ? 1 : 0;
 752         unsigned int timeout;
 753         u16 len;
 754         u8 ireason;
 755
 756         ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x",
 757                                   rq->cmd[0], write);
 758
 759         /* check for errors */
 760         dma = drive->dma;
 761         if (dma) {
 762                 drive->dma = 0;
 763                 dma_error = hwif->dma_ops->dma_end(drive);
 764                 if (dma_error) {
 765                         printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
 766                                         write ? "write" : "read");
 767                         ide_dma_off(drive);
 768                 }
 769         }
 770
 771         if (cdrom_decode_status(drive, 0, &stat))
 772                 return ide_stopped;
 773
 774         /* using dma, transfer is complete now */
 775         if (dma) {
 776                 if (dma_error)
 777                         return ide_error(drive, "dma error", stat);
 778                 if (blk_fs_request(rq)) {
 779                         ide_complete_rq(drive, 0, rq->nr_sectors
 780                                 ? (rq->nr_sectors << 9) : ide_rq_bytes(rq));
 781                         return ide_stopped;
 782                 } else if (rq->cmd_type == REQ_TYPE_ATA_PC && !rq->bio) {
 783                         ide_complete_rq(drive, 0, 512);
 784                         return ide_stopped;
 785                 }
 786                 goto end_request;
 787         }
 788
 789         ide_read_bcount_and_ireason(drive, &len, &ireason);
 790
 791         thislen = blk_fs_request(rq) ? len : rq->data_len;
 792         if (thislen > len)
 793                 thislen = len;
 794
 795         ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d",
 796                                   stat, thislen);
 797
 798         /* If DRQ is clear, the command has completed. */
 799         if ((stat & ATA_DRQ) == 0) {
 800                 if (blk_fs_request(rq)) {
 801                         /*
 802                          * If we're not done reading/writing, complain.
 803                          * Otherwise, complete the command normally.
 804                          */
 805                         uptodate = 1;
 806                         if (rq->current_nr_sectors > 0) {
 807                                 printk(KERN_ERR PFX "%s: %s: data underrun "
 808                                                 "(%d blocks)\n",
 809                                                 drive->name, __func__,
 810                                                 rq->current_nr_sectors);
 811                                 if (!write)
 812                                         rq->cmd_flags |= REQ_FAILED;
 813                                 uptodate = 0;
 814                         }
 815                         cdrom_end_request(drive, uptodate);
 816                         return ide_stopped;
 817                 } else if (!blk_pc_request(rq)) {
 818                         ide_cd_request_sense_fixup(drive, rq);
 819                         /* complain if we still have data left to transfer */
 820                         uptodate = rq->data_len ? 0 : 1;
 821                 }
 822                 goto end_request;
 823         }
 824
 825         /* check which way to transfer data */
 826         if (ide_cd_check_ireason(drive, rq, len, ireason, write))
 827                 return ide_stopped;
 828
 829         if (blk_fs_request(rq)) {
 830                 if (write == 0) {
 831                         int nskip;
 832
 833                         if (ide_cd_check_transfer_size(drive, len)) {
 834                                 cdrom_end_request(drive, 0);
 835                                 return ide_stopped;
 836                         }
 837
 838                         /*
 839                          * First, figure out if we need to bit-bucket
 840                          * any of the leading sectors.
 841                          */
 842                         nskip = min_t(int, rq->current_nr_sectors
 843                                            - bio_cur_sectors(rq->bio),
 844                                            thislen >> 9);
 845                         if (nskip > 0) {
 846                                 ide_pad_transfer(drive, write, nskip << 9);
 847                                 rq->current_nr_sectors -= nskip;
 848                                 thislen -= (nskip << 9);
 849                         }
 850                 }
 851         }
 852
 853         if (ireason == 0) {
 854                 write = 1;
 855                 xferfunc = hwif->tp_ops->output_data;
 856         } else {
 857                 write = 0;
 858                 xferfunc = hwif->tp_ops->input_data;
 859         }
 860
 861         ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, "
 862                                   "ireason: 0x%x",
 863                                   rq->cmd_type, ireason);
 864
 865         /* transfer data */
 866         while (thislen > 0) {
 867                 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data;
 868                 int blen = rq->data_len;
 869
 870                 /* bio backed? */
 871                 if (rq->bio) {
 872                         if (blk_fs_request(rq)) {
 873                                 ptr = rq->buffer;
 874                                 blen = rq->current_nr_sectors << 9;
 875                         } else {
 876                                 ptr = bio_data(rq->bio);
 877                                 blen = bio_iovec(rq->bio)->bv_len;
 878                         }
 879                 }
 880
 881                 if (!ptr) {
 882                         if (blk_fs_request(rq) && !write)
 883                                 /*
 884                                  * If the buffers are full, pipe the rest into
 885                                  * oblivion.
 886                                  */
 887                                 ide_pad_transfer(drive, 0, thislen);
 888                         else {
 889                                 printk(KERN_ERR PFX "%s: confused, missing data\n",
 890                                                 drive->name);
 891                                 blk_dump_rq_flags(rq, rq_data_dir(rq)
 892                                                   ? "cdrom_newpc_intr, write"
 893                                                   : "cdrom_newpc_intr, read");
 894                         }
 895                         break;
 896                 }
 897
 898                 if (blen > thislen)
 899                         blen = thislen;
 900
 901                 xferfunc(drive, NULL, ptr, blen);
 902
 903                 thislen -= blen;
 904                 len -= blen;
 905
 906                 if (blk_fs_request(rq)) {
 907                         rq->buffer += blen;
 908                         rq->nr_sectors -= (blen >> 9);
 909                         rq->current_nr_sectors -= (blen >> 9);
 910                         rq->sector += (blen >> 9);
 911
 912                         if (rq->current_nr_sectors == 0 && rq->nr_sectors)
 913                                 cdrom_end_request(drive, 1);
 914                 } else {
 915                         rq->data_len -= blen;
 916
 917                         /*
 918                          * The request can't be completed until DRQ is cleared.
 919                          * So complete the data, but don't complete the request
 920                          * using the dummy function for the callback feature
 921                          * of blk_end_request_callback().
 922                          */
 923                         if (rq->bio)
 924                                 blk_end_request_callback(rq, 0, blen,
 925                                                  cdrom_newpc_intr_dummy_cb);
 926                         else
 927                                 rq->data += blen;
 928                 }
 929                 if (!write && blk_sense_request(rq))
 930                         rq->sense_len += blen;
 931         }
 932
 933         /* pad, if necessary */
 934         if (!blk_fs_request(rq) && len > 0)
 935                 ide_pad_transfer(drive, write, len);
 936
 937         if (blk_pc_request(rq)) {
 938                 timeout = rq->timeout;
 939         } else {
 940                 timeout = ATAPI_WAIT_PC;
 941                 if (!blk_fs_request(rq))
 942                         expiry = ide_cd_expiry;
 943         }
 944
 945         hwif->expiry = expiry;
 946         ide_set_handler(drive, cdrom_newpc_intr, timeout);
 947         return ide_started;
 948
 949 end_request:
 950         if (blk_pc_request(rq)) {
 951                 unsigned int dlen = rq->data_len;
 952
 953                 if (dma)
 954                         rq->data_len = 0;
 955
 956                 if (blk_end_request(rq, 0, dlen))
 957                         BUG();
 958
 959                 hwif->rq = NULL;
 960         } else {
 961                 if (!uptodate)
 962                         rq->cmd_flags |= REQ_FAILED;
 963                 cdrom_end_request(drive, uptodate);
 964         }
 965         return ide_stopped;
 966 }
 967
 968 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
 969 {
 970         struct cdrom_info *cd = drive->driver_data;
 971         int write = rq_data_dir(rq) == WRITE;
 972         unsigned short sectors_per_frame =
 973                 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
 974
 975         ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, write: 0x%x, "
 976                                   "secs_per_frame: %u",
 977                                   rq->cmd[0], write, sectors_per_frame);
 978
 979         if (write) {
 980                 /* disk has become write protected */
 981                 if (get_disk_ro(cd->disk)) {
 982                         cdrom_end_request(drive, 0);
 983                         return ide_stopped;
 984                 }
 985         } else {
 986                 /*
 987                  * We may be retrying this request after an error.  Fix up any
 988                  * weirdness which might be present in the request packet.
 989                  */
 990                 ide_cd_restore_request(drive, rq);
 991         }
 992
 993         /* use DMA, if possible / writes *must* be hardware frame aligned */
 994         if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
 995             (rq->sector & (sectors_per_frame - 1))) {
 996                 if (write) {
 997                         cdrom_end_request(drive, 0);
 998                         return ide_stopped;
 999                 }
1000                 drive->dma = 0;
1001         } else
1002                 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1003
1004         if (write)
1005                 cd->devinfo.media_written = 1;
1006
1007         return ide_started;
1008 }
1009
1010 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
1011 {
1012
1013         ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
1014                                   rq->cmd[0], rq->cmd_type);
1015
1016         if (blk_pc_request(rq))
1017                 rq->cmd_flags |= REQ_QUIET;
1018         else
1019                 rq->cmd_flags &= ~REQ_FAILED;
1020
1021         drive->dma = 0;
1022
1023         /* sg request */
1024         if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) {
1025                 struct request_queue *q = drive->queue;
1026                 unsigned int alignment;
1027                 char *buf;
1028
1029                 if (rq->bio)
1030                         buf = bio_data(rq->bio);
1031                 else
1032                         buf = rq->data;
1033
1034                 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1035
1036                 /*
1037                  * check if dma is safe
1038                  *
1039                  * NOTE! The "len" and "addr" checks should possibly have
1040                  * separate masks.
1041                  */
1042                 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
1043                 if ((unsigned long)buf & alignment
1044                     || rq->data_len & q->dma_pad_mask
1045                     || object_is_on_stack(buf))
1046                         drive->dma = 0;
1047         }
1048 }
1049
1050 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
1051                                         sector_t block)
1052 {
1053         struct ide_cmd cmd;
1054
1055         ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
1056                                   rq->cmd[0], (unsigned long long)block);
1057
1058         if (drive->debug_mask & IDE_DBG_RQ)
1059                 blk_dump_rq_flags(rq, "ide_cd_do_request");
1060
1061         if (blk_fs_request(rq)) {
1062                 if (cdrom_start_rw(drive, rq) == ide_stopped)
1063                         return ide_stopped;
1064
1065                 if (ide_cd_prepare_rw_request(drive, rq) == ide_stopped)
1066                         return ide_stopped;
1067         } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
1068                    rq->cmd_type == REQ_TYPE_ATA_PC) {
1069                 if (!rq->timeout)
1070                         rq->timeout = ATAPI_WAIT_PC;
1071
1072                 cdrom_do_block_pc(drive, rq);
1073         } else if (blk_special_request(rq)) {
1074                 /* right now this can only be a reset... */
1075                 cdrom_end_request(drive, 1);
1076                 return ide_stopped;
1077         } else {
1078                 blk_dump_rq_flags(rq, DRV_NAME " bad flags");
1079                 cdrom_end_request(drive, 0);
1080                 return ide_stopped;
1081         }
1082
1083         memset(&cmd, 0, sizeof(cmd));
1084
1085         if (rq_data_dir(rq))
1086                 cmd.tf_flags |= IDE_TFLAG_WRITE;
1087
1088         cmd.rq = rq;
1089
1090         return ide_issue_pc(drive, &cmd);
1091 }
1092
1093 /*
1094  * Ioctl handling.
1095  *
1096  * Routines which queue packet commands take as a final argument a pointer to a
1097  * request_sense struct. If execution of the command results in an error with a
1098  * CHECK CONDITION status, this structure will be filled with the results of the
1099  * subsequent request sense command. The pointer can also be NULL, in which case
1100  * no sense information is returned.
1101  */
1102 static void msf_from_bcd(struct atapi_msf *msf)
1103 {
1104         msf->minute = bcd2bin(msf->minute);
1105         msf->second = bcd2bin(msf->second);
1106         msf->frame  = bcd2bin(msf->frame);
1107 }
1108
1109 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
1110 {
1111         struct cdrom_info *info = drive->driver_data;
1112         struct cdrom_device_info *cdi = &info->devinfo;
1113         unsigned char cmd[BLK_MAX_CDB];
1114
1115         ide_debug_log(IDE_DBG_FUNC, "enter");
1116
1117         memset(cmd, 0, BLK_MAX_CDB);
1118         cmd[0] = GPCMD_TEST_UNIT_READY;
1119
1120         /*
1121          * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
1122          * instead of supporting the LOAD_UNLOAD opcode.
1123          */
1124         cmd[7] = cdi->sanyo_slot % 3;
1125
1126         return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
1127 }
1128
1129 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
1130                                unsigned long *sectors_per_frame,
1131                                struct request_sense *sense)
1132 {
1133         struct {
1134                 __be32 lba;
1135                 __be32 blocklen;
1136         } capbuf;
1137
1138         int stat;
1139         unsigned char cmd[BLK_MAX_CDB];
1140         unsigned len = sizeof(capbuf);
1141         u32 blocklen;
1142
1143         ide_debug_log(IDE_DBG_FUNC, "enter");
1144
1145         memset(cmd, 0, BLK_MAX_CDB);
1146         cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1147
1148         stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
1149                                REQ_QUIET);
1150         if (stat)
1151                 return stat;
1152
1153         /*
1154          * Sanity check the given block size
1155          */
1156         blocklen = be32_to_cpu(capbuf.blocklen);
1157         switch (blocklen) {
1158         case 512:
1159         case 1024:
1160         case 2048:
1161         case 4096:
1162                 break;
1163         default:
1164                 printk(KERN_ERR PFX "%s: weird block size %u\n",
1165                                 drive->name, blocklen);
1166                 printk(KERN_ERR PFX "%s: default to 2kb block size\n",
1167                                 drive->name);
1168                 blocklen = 2048;
1169                 break;
1170         }
1171
1172         *capacity = 1 + be32_to_cpu(capbuf.lba);
1173         *sectors_per_frame = blocklen >> SECTOR_BITS;
1174
1175         ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu",
1176                                      *capacity, *sectors_per_frame);
1177
1178         return 0;
1179 }
1180
1181 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1182                                 int format, char *buf, int buflen,
1183                                 struct request_sense *sense)
1184 {
1185         unsigned char cmd[BLK_MAX_CDB];
1186
1187         ide_debug_log(IDE_DBG_FUNC, "enter");
1188
1189         memset(cmd, 0, BLK_MAX_CDB);
1190
1191         cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1192         cmd[6] = trackno;
1193         cmd[7] = (buflen >> 8);
1194         cmd[8] = (buflen & 0xff);
1195         cmd[9] = (format << 6);
1196
1197         if (msf_flag)
1198                 cmd[1] = 2;
1199
1200         return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
1201 }
1202
1203 /* Try to read the entire TOC for the disk into our internal buffer. */
1204 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1205 {
1206         int stat, ntracks, i;
1207         struct cdrom_info *info = drive->driver_data;
1208         struct cdrom_device_info *cdi = &info->devinfo;
1209         struct atapi_toc *toc = info->toc;
1210         struct {
1211                 struct atapi_toc_header hdr;
1212                 struct atapi_toc_entry  ent;
1213         } ms_tmp;
1214         long last_written;
1215         unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1216
1217         ide_debug_log(IDE_DBG_FUNC, "enter");
1218
1219         if (toc == NULL) {
1220                 /* try to allocate space */
1221                 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1222                 if (toc == NULL) {
1223                         printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
1224                                         drive->name);
1225                         return -ENOMEM;
1226                 }
1227                 info->toc = toc;
1228         }
1229
1230         /*
1231          * Check to see if the existing data is still valid. If it is,
1232          * just return.
1233          */
1234         (void) cdrom_check_status(drive, sense);
1235
1236         if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
1237                 return 0;
1238
1239         /* try to get the total cdrom capacity and sector size */
1240         stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1241                                    sense);
1242         if (stat)
1243                 toc->capacity = 0x1fffff;
1244
1245         set_capacity(info->disk, toc->capacity * sectors_per_frame);
1246         /* save a private copy of the TOC capacity for error handling */
1247         drive->probed_capacity = toc->capacity * sectors_per_frame;
1248
1249         blk_queue_hardsect_size(drive->queue,
1250                                 sectors_per_frame << SECTOR_BITS);
1251
1252         /* first read just the header, so we know how long the TOC is */
1253         stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1254                                     sizeof(struct atapi_toc_header), sense);
1255         if (stat)
1256                 return stat;
1257
1258         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1259                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1260                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1261         }
1262
1263         ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1264         if (ntracks <= 0)
1265                 return -EIO;
1266         if (ntracks > MAX_TRACKS)
1267                 ntracks = MAX_TRACKS;
1268
1269         /* now read the whole schmeer */
1270         stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1271                                   (char *)&toc->hdr,
1272                                    sizeof(struct atapi_toc_header) +
1273                                    (ntracks + 1) *
1274                                    sizeof(struct atapi_toc_entry), sense);
1275
1276         if (stat && toc->hdr.first_track > 1) {
1277                 /*
1278                  * Cds with CDI tracks only don't have any TOC entries, despite
1279                  * of this the returned values are
1280                  * first_track == last_track = number of CDI tracks + 1,
1281                  * so that this case is indistinguishable from the same layout
1282                  * plus an additional audio track. If we get an error for the
1283                  * regular case, we assume a CDI without additional audio
1284                  * tracks. In this case the readable TOC is empty (CDI tracks
1285                  * are not included) and only holds the Leadout entry.
1286                  *
1287                  * Heiko Eißfeldt.
1288                  */
1289                 ntracks = 0;
1290                 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1291                                            (char *)&toc->hdr,
1292                                            sizeof(struct atapi_toc_header) +
1293                                            (ntracks + 1) *
1294                                            sizeof(struct atapi_toc_entry),
1295                                            sense);
1296                 if (stat)
1297                         return stat;
1298
1299                 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1300                         toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1301                         toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1302                 } else {
1303                         toc->hdr.first_track = CDROM_LEADOUT;
1304                         toc->hdr.last_track = CDROM_LEADOUT;
1305                 }
1306         }
1307
1308         if (stat)
1309                 return stat;
1310
1311         toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1312
1313         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1314                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1315                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1316         }
1317
1318         for (i = 0; i <= ntracks; i++) {
1319                 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1320                         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1321                                 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1322                         msf_from_bcd(&toc->ent[i].addr.msf);
1323                 }
1324                 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1325                                                   toc->ent[i].addr.msf.second,
1326                                                   toc->ent[i].addr.msf.frame);
1327         }
1328
1329         if (toc->hdr.first_track != CDROM_LEADOUT) {
1330                 /* read the multisession information */
1331                 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1332                                            sizeof(ms_tmp), sense);
1333                 if (stat)
1334                         return stat;
1335
1336                 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1337         } else {
1338                 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1339                 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1340                 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1341         }
1342
1343         if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1344                 /* re-read multisession information using MSF format */
1345                 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1346                                            sizeof(ms_tmp), sense);
1347                 if (stat)
1348                         return stat;
1349
1350                 msf_from_bcd(&ms_tmp.ent.addr.msf);
1351                 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1352                                                    ms_tmp.ent.addr.msf.second,
1353                                                    ms_tmp.ent.addr.msf.frame);
1354         }
1355
1356         toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1357
1358         /* now try to get the total cdrom capacity */
1359         stat = cdrom_get_last_written(cdi, &last_written);
1360         if (!stat && (last_written > toc->capacity)) {
1361                 toc->capacity = last_written;
1362                 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1363                 drive->probed_capacity = toc->capacity * sectors_per_frame;
1364         }
1365
1366         /* Remember that we've read this stuff. */
1367         drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1368
1369         return 0;
1370 }
1371
1372 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1373 {
1374         struct cdrom_info *info = drive->driver_data;
1375         struct cdrom_device_info *cdi = &info->devinfo;
1376         struct packet_command cgc;
1377         int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1378
1379         ide_debug_log(IDE_DBG_FUNC, "enter");
1380
1381         if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1382                 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1383
1384         init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1385         do {
1386                 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1387                 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1388                 if (!stat)
1389                         break;
1390         } while (--attempts);
1391         return stat;
1392 }
1393
1394 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1395 {
1396         struct cdrom_info *cd = drive->driver_data;
1397         u16 curspeed, maxspeed;
1398
1399         ide_debug_log(IDE_DBG_FUNC, "enter");
1400
1401         if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1402                 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1403                 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1404         } else {
1405                 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1406                 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1407         }
1408
1409         ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u",
1410                                      curspeed, maxspeed);
1411
1412         cd->current_speed = (curspeed + (176/2)) / 176;
1413         cd->max_speed = (maxspeed + (176/2)) / 176;
1414 }
1415
1416 #define IDE_CD_CAPABILITIES \
1417         (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1418          CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1419          CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1420          CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1421          CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1422
1423 static struct cdrom_device_ops ide_cdrom_dops = {
1424         .open                   = ide_cdrom_open_real,
1425         .release                = ide_cdrom_release_real,
1426         .drive_status           = ide_cdrom_drive_status,
1427         .media_changed          = ide_cdrom_check_media_change_real,
1428         .tray_move              = ide_cdrom_tray_move,
1429         .lock_door              = ide_cdrom_lock_door,
1430         .select_speed           = ide_cdrom_select_speed,
1431         .get_last_session       = ide_cdrom_get_last_session,
1432         .get_mcn                = ide_cdrom_get_mcn,
1433         .reset                  = ide_cdrom_reset,
1434         .audio_ioctl            = ide_cdrom_audio_ioctl,
1435         .capability             = IDE_CD_CAPABILITIES,
1436         .generic_packet         = ide_cdrom_packet,
1437 };
1438
1439 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1440 {
1441         struct cdrom_info *info = drive->driver_data;
1442         struct cdrom_device_info *devinfo = &info->devinfo;
1443
1444         ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots);
1445
1446         devinfo->ops = &ide_cdrom_dops;
1447         devinfo->speed = info->current_speed;
1448         devinfo->capacity = nslots;
1449         devinfo->handle = drive;
1450         strcpy(devinfo->name, drive->name);
1451
1452         if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1453                 devinfo->mask |= CDC_SELECT_SPEED;
1454
1455         devinfo->disk = info->disk;
1456         return register_cdrom(devinfo);
1457 }
1458
1459 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1460 {
1461         struct cdrom_info *cd = drive->driver_data;
1462         struct cdrom_device_info *cdi = &cd->devinfo;
1463         u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1464         mechtype_t mechtype;
1465         int nslots = 1;
1466
1467         ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx",
1468                                      drive->media, drive->atapi_flags);
1469
1470         cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1471                      CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1472                      CDC_MO_DRIVE | CDC_RAM);
1473
1474         if (drive->media == ide_optical) {
1475                 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1476                 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1477                                 drive->name);
1478                 return nslots;
1479         }
1480
1481         if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1482                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1483                 cdi->mask &= ~CDC_PLAY_AUDIO;
1484                 return nslots;
1485         }
1486
1487         /*
1488          * We have to cheat a little here. the packet will eventually be queued
1489          * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1490          * Since this device hasn't been registered with the Uniform layer yet,
1491          * it can't do this. Same goes for cdi->ops.
1492          */
1493         cdi->handle = drive;
1494         cdi->ops = &ide_cdrom_dops;
1495
1496         if (ide_cdrom_get_capabilities(drive, buf))
1497                 return 0;
1498
1499         if ((buf[8 + 6] & 0x01) == 0)
1500                 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1501         if (buf[8 + 6] & 0x08)
1502                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1503         if (buf[8 + 3] & 0x01)
1504                 cdi->mask &= ~CDC_CD_R;
1505         if (buf[8 + 3] & 0x02)
1506                 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1507         if (buf[8 + 2] & 0x38)
1508                 cdi->mask &= ~CDC_DVD;
1509         if (buf[8 + 3] & 0x20)
1510                 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1511         if (buf[8 + 3] & 0x10)
1512                 cdi->mask &= ~CDC_DVD_R;
1513         if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1514                 cdi->mask &= ~CDC_PLAY_AUDIO;
1515
1516         mechtype = buf[8 + 6] >> 5;
1517         if (mechtype == mechtype_caddy ||
1518             mechtype == mechtype_popup ||
1519             (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1520                 cdi->mask |= CDC_CLOSE_TRAY;
1521
1522         if (cdi->sanyo_slot > 0) {
1523                 cdi->mask &= ~CDC_SELECT_DISC;
1524                 nslots = 3;
1525         } else if (mechtype == mechtype_individual_changer ||
1526                    mechtype == mechtype_cartridge_changer) {
1527                 nslots = cdrom_number_of_slots(cdi);
1528                 if (nslots > 1)
1529                         cdi->mask &= ~CDC_SELECT_DISC;
1530         }
1531
1532         ide_cdrom_update_speed(drive, buf);
1533
1534         printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1535
1536         /* don't print speed if the drive reported 0 */
1537         if (cd->max_speed)
1538                 printk(KERN_CONT " %dX", cd->max_speed);
1539
1540         printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1541
1542         if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1543                 printk(KERN_CONT " DVD%s%s",
1544                                  (cdi->mask & CDC_DVD_R) ? "" : "-R",
1545                                  (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1546
1547         if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1548                 printk(KERN_CONT " CD%s%s",
1549                                  (cdi->mask & CDC_CD_R) ? "" : "-R",
1550                                  (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1551
1552         if ((cdi->mask & CDC_SELECT_DISC) == 0)
1553                 printk(KERN_CONT " changer w/%d slots", nslots);
1554         else
1555                 printk(KERN_CONT " drive");
1556
1557         printk(KERN_CONT ", %dkB Cache\n",
1558                          be16_to_cpup((__be16 *)&buf[8 + 12]));
1559
1560         return nslots;
1561 }
1562
1563 /* standard prep_rq_fn that builds 10 byte cmds */
1564 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1565 {
1566         int hard_sect = queue_hardsect_size(q);
1567         long block = (long)rq->hard_sector / (hard_sect >> 9);
1568         unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1569
1570         memset(rq->cmd, 0, BLK_MAX_CDB);
1571
1572         if (rq_data_dir(rq) == READ)
1573                 rq->cmd[0] = GPCMD_READ_10;
1574         else
1575                 rq->cmd[0] = GPCMD_WRITE_10;
1576
1577         /*
1578          * fill in lba
1579          */
1580         rq->cmd[2] = (block >> 24) & 0xff;
1581         rq->cmd[3] = (block >> 16) & 0xff;
1582         rq->cmd[4] = (block >>  8) & 0xff;
1583         rq->cmd[5] = block & 0xff;
1584
1585         /*
1586          * and transfer length
1587          */
1588         rq->cmd[7] = (blocks >> 8) & 0xff;
1589         rq->cmd[8] = blocks & 0xff;
1590         rq->cmd_len = 10;
1591         return BLKPREP_OK;
1592 }
1593
1594 /*
1595  * Most of the SCSI commands are supported directly by ATAPI devices.
1596  * This transform handles the few exceptions.
1597  */
1598 static int ide_cdrom_prep_pc(struct request *rq)
1599 {
1600         u8 *c = rq->cmd;
1601
1602         /* transform 6-byte read/write commands to the 10-byte version */
1603         if (c[0] == READ_6 || c[0] == WRITE_6) {
1604                 c[8] = c[4];
1605                 c[5] = c[3];
1606                 c[4] = c[2];
1607                 c[3] = c[1] & 0x1f;
1608                 c[2] = 0;
1609                 c[1] &= 0xe0;
1610                 c[0] += (READ_10 - READ_6);
1611                 rq->cmd_len = 10;
1612                 return BLKPREP_OK;
1613         }
1614
1615         /*
1616          * it's silly to pretend we understand 6-byte sense commands, just
1617          * reject with ILLEGAL_REQUEST and the caller should take the
1618          * appropriate action
1619          */
1620         if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1621                 rq->errors = ILLEGAL_REQUEST;
1622                 return BLKPREP_KILL;
1623         }
1624
1625         return BLKPREP_OK;
1626 }
1627
1628 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1629 {
1630         if (blk_fs_request(rq))
1631                 return ide_cdrom_prep_fs(q, rq);
1632         else if (blk_pc_request(rq))
1633                 return ide_cdrom_prep_pc(rq);
1634
1635         return 0;
1636 }
1637
1638 struct cd_list_entry {
1639         const char      *id_model;
1640         const char      *id_firmware;
1641         unsigned int    cd_flags;
1642 };
1643
1644 #ifdef CONFIG_IDE_PROC_FS
1645 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1646 {
1647         unsigned long capacity, sectors_per_frame;
1648
1649         if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1650                 return 0;
1651
1652         return capacity * sectors_per_frame;
1653 }
1654
1655 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1656                                         int count, int *eof, void *data)
1657 {
1658         ide_drive_t *drive = data;
1659         int len;
1660
1661         len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1662         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1663 }
1664
1665 static ide_proc_entry_t idecd_proc[] = {
1666         { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1667         { NULL, 0, NULL, NULL }
1668 };
1669
1670 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1671 {
1672         return idecd_proc;
1673 }
1674
1675 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1676 {
1677         return NULL;
1678 }
1679 #endif
1680
1681 static const struct cd_list_entry ide_cd_quirks_list[] = {
1682         /* Limit transfer size per interrupt. */
1683         { "SAMSUNG CD-ROM SCR-2430", NULL,   IDE_AFLAG_LIMIT_NFRAMES         },
1684         { "SAMSUNG CD-ROM SCR-2432", NULL,   IDE_AFLAG_LIMIT_NFRAMES         },
1685         /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1686         { "SAMSUNG CD-ROM SCR-3231", NULL,   IDE_AFLAG_NO_SPEED_SELECT       },
1687         /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1688         { "NEC CD-ROM DRIVE:260",    "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1689                                              IDE_AFLAG_PRE_ATAPI12,          },
1690         /* Vertos 300, some versions of this drive like to talk BCD. */
1691         { "V003S0DS",                NULL,   IDE_AFLAG_VERTOS_300_SSD,       },
1692         /* Vertos 600 ESD. */
1693         { "V006E0DS",                NULL,   IDE_AFLAG_VERTOS_600_ESD,       },
1694         /*
1695          * Sanyo 3 CD changer uses a non-standard command for CD changing
1696          * (by default standard ATAPI support for CD changers is used).
1697          */
1698         { "CD-ROM CDR-C3 G",         NULL,   IDE_AFLAG_SANYO_3CD             },
1699         { "CD-ROM CDR-C3G",          NULL,   IDE_AFLAG_SANYO_3CD             },
1700         { "CD-ROM CDR_C36",          NULL,   IDE_AFLAG_SANYO_3CD             },
1701         /* Stingray 8X CD-ROM. */
1702         { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1703         /*
1704          * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1705          * mode sense page capabilities size, but older drives break.
1706          */
1707         { "ATAPI CD ROM DRIVE 50X MAX", NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1708         { "WPI CDS-32X",                NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1709         /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1710         { "",                        "241N", IDE_AFLAG_LE_SPEED_FIELDS       },
1711         /*
1712          * Some drives used by Apple don't advertise audio play
1713          * but they do support reading TOC & audio datas.
1714          */
1715         { "MATSHITADVD-ROM SR-8187", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1716         { "MATSHITADVD-ROM SR-8186", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1717         { "MATSHITADVD-ROM SR-8176", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1718         { "MATSHITADVD-ROM SR-8174", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1719         { "Optiarc DVD RW AD-5200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1720         { "Optiarc DVD RW AD-7200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1721         { "Optiarc DVD RW AD-7543A", NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1722         { "TEAC CD-ROM CD-224E",     NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1723         { NULL, NULL, 0 }
1724 };
1725
1726 static unsigned int ide_cd_flags(u16 *id)
1727 {
1728         const struct cd_list_entry *cle = ide_cd_quirks_list;
1729
1730         while (cle->id_model) {
1731                 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1732                     (cle->id_firmware == NULL ||
1733                      strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1734                         return cle->cd_flags;
1735                 cle++;
1736         }
1737
1738         return 0;
1739 }
1740
1741 static int ide_cdrom_setup(ide_drive_t *drive)
1742 {
1743         struct cdrom_info *cd = drive->driver_data;
1744         struct cdrom_device_info *cdi = &cd->devinfo;
1745         u16 *id = drive->id;
1746         char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1747         int nslots;
1748
1749         ide_debug_log(IDE_DBG_PROBE, "enter");
1750
1751         blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
1752         blk_queue_dma_alignment(drive->queue, 31);
1753         blk_queue_update_dma_pad(drive->queue, 15);
1754         drive->queue->unplug_delay = (1 * HZ) / 1000;
1755         if (!drive->queue->unplug_delay)
1756                 drive->queue->unplug_delay = 1;
1757
1758         drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1759         drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1760
1761         if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1762             fw_rev[4] == '1' && fw_rev[6] <= '2')
1763                 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1764                                      IDE_AFLAG_TOCADDR_AS_BCD);
1765         else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1766                  fw_rev[4] == '1' && fw_rev[6] <= '2')
1767                 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1768         else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1769                 /* 3 => use CD in slot 0 */
1770                 cdi->sanyo_slot = 3;
1771
1772         nslots = ide_cdrom_probe_capabilities(drive);
1773
1774         /* set correct block size */
1775         blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
1776
1777         if (ide_cdrom_register(drive, nslots)) {
1778                 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1779                                 " cdrom driver.\n", drive->name, __func__);
1780                 cd->devinfo.handle = NULL;
1781                 return 1;
1782         }
1783
1784         ide_proc_register_driver(drive, cd->driver);
1785         return 0;
1786 }
1787
1788 static void ide_cd_remove(ide_drive_t *drive)
1789 {
1790         struct cdrom_info *info = drive->driver_data;
1791
1792         ide_debug_log(IDE_DBG_FUNC, "enter");
1793
1794         ide_proc_unregister_driver(drive, info->driver);
1795         device_del(&info->dev);
1796         del_gendisk(info->disk);
1797
1798         mutex_lock(&idecd_ref_mutex);
1799         put_device(&info->dev);
1800         mutex_unlock(&idecd_ref_mutex);
1801 }
1802
1803 static void ide_cd_release(struct device *dev)
1804 {
1805         struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
1806         struct cdrom_device_info *devinfo = &info->devinfo;
1807         ide_drive_t *drive = info->drive;
1808         struct gendisk *g = info->disk;
1809
1810         ide_debug_log(IDE_DBG_FUNC, "enter");
1811
1812         kfree(info->toc);
1813         if (devinfo->handle == drive)
1814                 unregister_cdrom(devinfo);
1815         drive->driver_data = NULL;
1816         blk_queue_prep_rq(drive->queue, NULL);
1817         g->private_data = NULL;
1818         put_disk(g);
1819         kfree(info);
1820 }
1821
1822 static int ide_cd_probe(ide_drive_t *);
1823
1824 static struct ide_driver ide_cdrom_driver = {
1825         .gen_driver = {
1826                 .owner          = THIS_MODULE,
1827                 .name           = "ide-cdrom",
1828                 .bus            = &ide_bus_type,
1829         },
1830         .probe                  = ide_cd_probe,
1831         .remove                 = ide_cd_remove,
1832         .version                = IDECD_VERSION,
1833         .do_request             = ide_cd_do_request,
1834 #ifdef CONFIG_IDE_PROC_FS
1835         .proc_entries           = ide_cd_proc_entries,
1836         .proc_devsets           = ide_cd_proc_devsets,
1837 #endif
1838 };
1839
1840 static int idecd_open(struct block_device *bdev, fmode_t mode)
1841 {
1842         struct cdrom_info *info = ide_cd_get(bdev->bd_disk);
1843         int rc = -ENOMEM;
1844
1845         if (!info)
1846                 return -ENXIO;
1847
1848         rc = cdrom_open(&info->devinfo, bdev, mode);
1849
1850         if (rc < 0)
1851                 ide_cd_put(info);
1852
1853         return rc;
1854 }
1855
1856 static int idecd_release(struct gendisk *disk, fmode_t mode)
1857 {
1858         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1859
1860         cdrom_release(&info->devinfo, mode);
1861
1862         ide_cd_put(info);
1863
1864         return 0;
1865 }
1866
1867 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1868 {
1869         struct packet_command cgc;
1870         char buffer[16];
1871         int stat;
1872         char spindown;
1873
1874         if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1875                 return -EFAULT;
1876
1877         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1878
1879         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1880         if (stat)
1881                 return stat;
1882
1883         buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1884         return cdrom_mode_select(cdi, &cgc);
1885 }
1886
1887 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1888 {
1889         struct packet_command cgc;
1890         char buffer[16];
1891         int stat;
1892         char spindown;
1893
1894         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1895
1896         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1897         if (stat)
1898                 return stat;
1899
1900         spindown = buffer[11] & 0x0f;
1901         if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1902                 return -EFAULT;
1903         return 0;
1904 }
1905
1906 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1907                         unsigned int cmd, unsigned long arg)
1908 {
1909         struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1910         int err;
1911
1912         switch (cmd) {
1913         case CDROMSETSPINDOWN:
1914                 return idecd_set_spindown(&info->devinfo, arg);
1915         case CDROMGETSPINDOWN:
1916                 return idecd_get_spindown(&info->devinfo, arg);
1917         default:
1918                 break;
1919         }
1920
1921         err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1922         if (err == -EINVAL)
1923                 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
1924
1925         return err;
1926 }
1927
1928 static int idecd_media_changed(struct gendisk *disk)
1929 {
1930         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1931         return cdrom_media_changed(&info->devinfo);
1932 }
1933
1934 static int idecd_revalidate_disk(struct gendisk *disk)
1935 {
1936         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1937         struct request_sense sense;
1938
1939         ide_cd_read_toc(info->drive, &sense);
1940
1941         return  0;
1942 }
1943
1944 static struct block_device_operations idecd_ops = {
1945         .owner                  = THIS_MODULE,
1946         .open                   = idecd_open,
1947         .release                = idecd_release,
1948         .locked_ioctl           = idecd_ioctl,
1949         .media_changed          = idecd_media_changed,
1950         .revalidate_disk        = idecd_revalidate_disk
1951 };
1952
1953 /* module options */
1954 static char *ignore;
1955 module_param(ignore, charp, 0400);
1956
1957 static unsigned long debug_mask;
1958 module_param(debug_mask, ulong, 0644);
1959
1960 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1961
1962 static int ide_cd_probe(ide_drive_t *drive)
1963 {
1964         struct cdrom_info *info;
1965         struct gendisk *g;
1966         struct request_sense sense;
1967
1968         ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x",
1969                                      drive->driver_req, drive->media);
1970
1971         if (!strstr("ide-cdrom", drive->driver_req))
1972                 goto failed;
1973
1974         if (drive->media != ide_cdrom && drive->media != ide_optical)
1975                 goto failed;
1976
1977         /* skip drives that we were told to ignore */
1978         if (ignore != NULL) {
1979                 if (strstr(ignore, drive->name)) {
1980                         printk(KERN_INFO PFX "ignoring drive %s\n",
1981                                          drive->name);
1982                         goto failed;
1983                 }
1984         }
1985
1986         drive->debug_mask = debug_mask;
1987         drive->irq_handler = cdrom_newpc_intr;
1988
1989         info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
1990         if (info == NULL) {
1991                 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
1992                                 drive->name);
1993                 goto failed;
1994         }
1995
1996         g = alloc_disk(1 << PARTN_BITS);
1997         if (!g)
1998                 goto out_free_cd;
1999
2000         ide_init_disk(g, drive);
2001
2002         info->dev.parent = &drive->gendev;
2003         info->dev.release = ide_cd_release;
2004         dev_set_name(&info->dev, dev_name(&drive->gendev));
2005
2006         if (device_register(&info->dev))
2007                 goto out_free_disk;
2008
2009         info->drive = drive;
2010         info->driver = &ide_cdrom_driver;
2011         info->disk = g;
2012
2013         g->private_data = &info->driver;
2014
2015         drive->driver_data = info;
2016
2017         g->minors = 1;
2018         g->driverfs_dev = &drive->gendev;
2019         g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
2020         if (ide_cdrom_setup(drive)) {
2021                 put_device(&info->dev);
2022                 goto failed;
2023         }
2024
2025         ide_cd_read_toc(drive, &sense);
2026         g->fops = &idecd_ops;
2027         g->flags |= GENHD_FL_REMOVABLE;
2028         add_disk(g);
2029         return 0;
2030
2031 out_free_disk:
2032         put_disk(g);
2033 out_free_cd:
2034         kfree(info);
2035 failed:
2036         return -ENODEV;
2037 }
2038
2039 static void __exit ide_cdrom_exit(void)
2040 {
2041         driver_unregister(&ide_cdrom_driver.gen_driver);
2042 }
2043
2044 static int __init ide_cdrom_init(void)
2045 {
2046         printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
2047         return driver_register(&ide_cdrom_driver.gen_driver);
2048 }
2049
2050 MODULE_ALIAS("ide:*m-cdrom*");
2051 MODULE_ALIAS("ide-cd");
2052 module_init(ide_cdrom_init);
2053 module_exit(ide_cdrom_exit);
2054 MODULE_LICENSE("GPL");