git.oblomov.eu Git - linux-2.6/blob - drivers/ide/ide-cd.c

   1 /*
   2  * ATAPI CD-ROM driver.
   3  *
   4  * Copyright (C) 1994-1996   Scott Snyder <snyder@fnald0.fnal.gov>
   5  * Copyright (C) 1996-1998   Erik Andersen <andersee@debian.org>
   6  * Copyright (C) 1998-2000   Jens Axboe <axboe@suse.de>
   7  * Copyright (C) 2005, 2007  Bartlomiej Zolnierkiewicz
   8  *
   9  * May be copied or modified under the terms of the GNU General Public
  10  * License.  See linux/COPYING for more information.
  11  *
  12  * See Documentation/cdrom/ide-cd for usage information.
  13  *
  14  * Suggestions are welcome. Patches that work are more welcome though. ;-)
  15  * For those wishing to work on this driver, please be sure you download
  16  * and comply with the latest Mt. Fuji (SFF8090 version 4) and ATAPI
  17  * (SFF-8020i rev 2.6) standards. These documents can be obtained by
  18  * anonymous ftp from:
  19  * ftp://fission.dt.wdc.com/pub/standards/SFF_atapi/spec/SFF8020-r2.6/PS/8020r26.ps
  20  * ftp://ftp.avc-pioneer.com/Mtfuji4/Spec/Fuji4r10.pdf
  21  *
  22  * For historical changelog please see:
  23  *      Documentation/ide/ChangeLog.ide-cd.1994-2004
  24  */
  25
  26 #define DRV_NAME "ide-cd"
  27 #define PFX DRV_NAME ": "
  28
  29 #define IDECD_VERSION "5.00"
  30
  31 #include <linux/module.h>
  32 #include <linux/types.h>
  33 #include <linux/kernel.h>
  34 #include <linux/delay.h>
  35 #include <linux/timer.h>
  36 #include <linux/slab.h>
  37 #include <linux/interrupt.h>
  38 #include <linux/errno.h>
  39 #include <linux/cdrom.h>
  40 #include <linux/ide.h>
  41 #include <linux/completion.h>
  42 #include <linux/mutex.h>
  43 #include <linux/bcd.h>
  44
  45 /* For SCSI -> ATAPI command conversion */
  46 #include <scsi/scsi.h>
  47
  48 #include <linux/irq.h>
  49 #include <linux/io.h>
  50 #include <asm/byteorder.h>
  51 #include <linux/uaccess.h>
  52 #include <asm/unaligned.h>
  53
  54 #include "ide-cd.h"
  55
  56 static DEFINE_MUTEX(idecd_ref_mutex);
  57
  58 static void ide_cd_release(struct device *);
  59
  60 static struct cdrom_info *ide_cd_get(struct gendisk *disk)
  61 {
  62         struct cdrom_info *cd = NULL;
  63
  64         mutex_lock(&idecd_ref_mutex);
  65         cd = ide_drv_g(disk, cdrom_info);
  66         if (cd) {
  67                 if (ide_device_get(cd->drive))
  68                         cd = NULL;
  69                 else
  70                         get_device(&cd->dev);
  71
  72         }
  73         mutex_unlock(&idecd_ref_mutex);
  74         return cd;
  75 }
  76
  77 static void ide_cd_put(struct cdrom_info *cd)
  78 {
  79         ide_drive_t *drive = cd->drive;
  80
  81         mutex_lock(&idecd_ref_mutex);
  82         put_device(&cd->dev);
  83         ide_device_put(drive);
  84         mutex_unlock(&idecd_ref_mutex);
  85 }
  86
  87 /*
  88  * Generic packet command support and error handling routines.
  89  */
  90
  91 /* Mark that we've seen a media change and invalidate our internal buffers. */
  92 static void cdrom_saw_media_change(ide_drive_t *drive)
  93 {
  94         drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
  95         drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
  96 }
  97
  98 static int cdrom_log_sense(ide_drive_t *drive, struct request *rq,
  99                            struct request_sense *sense)
 100 {
 101         int log = 0;
 102
 103         ide_debug_log(IDE_DBG_SENSE, "sense_key: 0x%x", sense->sense_key);
 104
 105         if (!sense || !rq || (rq->cmd_flags & REQ_QUIET))
 106                 return 0;
 107
 108         switch (sense->sense_key) {
 109         case NO_SENSE:
 110         case RECOVERED_ERROR:
 111                 break;
 112         case NOT_READY:
 113                 /*
 114                  * don't care about tray state messages for e.g. capacity
 115                  * commands or in-progress or becoming ready
 116                  */
 117                 if (sense->asc == 0x3a || sense->asc == 0x04)
 118                         break;
 119                 log = 1;
 120                 break;
 121         case ILLEGAL_REQUEST:
 122                 /*
 123                  * don't log START_STOP unit with LoEj set, since we cannot
 124                  * reliably check if drive can auto-close
 125                  */
 126                 if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
 127                         break;
 128                 log = 1;
 129                 break;
 130         case UNIT_ATTENTION:
 131                 /*
 132                  * Make good and sure we've seen this potential media change.
 133                  * Some drives (i.e. Creative) fail to present the correct sense
 134                  * key in the error register.
 135                  */
 136                 cdrom_saw_media_change(drive);
 137                 break;
 138         default:
 139                 log = 1;
 140                 break;
 141         }
 142         return log;
 143 }
 144
 145 static void cdrom_analyze_sense_data(ide_drive_t *drive,
 146                               struct request *failed_command,
 147                               struct request_sense *sense)
 148 {
 149         unsigned long sector;
 150         unsigned long bio_sectors;
 151         struct cdrom_info *info = drive->driver_data;
 152
 153         ide_debug_log(IDE_DBG_SENSE, "error_code: 0x%x, sense_key: 0x%x",
 154                                      sense->error_code, sense->sense_key);
 155
 156         if (failed_command)
 157                 ide_debug_log(IDE_DBG_SENSE, "failed cmd: 0x%x",
 158                                              failed_command->cmd[0]);
 159
 160         if (!cdrom_log_sense(drive, failed_command, sense))
 161                 return;
 162
 163         /*
 164          * If a read toc is executed for a CD-R or CD-RW medium where the first
 165          * toc has not been recorded yet, it will fail with 05/24/00 (which is a
 166          * confusing error)
 167          */
 168         if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
 169                 if (sense->sense_key == 0x05 && sense->asc == 0x24)
 170                         return;
 171
 172         /* current error */
 173         if (sense->error_code == 0x70) {
 174                 switch (sense->sense_key) {
 175                 case MEDIUM_ERROR:
 176                 case VOLUME_OVERFLOW:
 177                 case ILLEGAL_REQUEST:
 178                         if (!sense->valid)
 179                                 break;
 180                         if (failed_command == NULL ||
 181                                         !blk_fs_request(failed_command))
 182                                 break;
 183                         sector = (sense->information[0] << 24) |
 184                                  (sense->information[1] << 16) |
 185                                  (sense->information[2] <<  8) |
 186                                  (sense->information[3]);
 187
 188                         if (drive->queue->hardsect_size == 2048)
 189                                 /* device sector size is 2K */
 190                                 sector <<= 2;
 191
 192                         bio_sectors = max(bio_sectors(failed_command->bio), 4U);
 193                         sector &= ~(bio_sectors - 1);
 194
 195                         /*
 196                          * The SCSI specification allows for the value
 197                          * returned by READ CAPACITY to be up to 75 2K
 198                          * sectors past the last readable block.
 199                          * Therefore, if we hit a medium error within the
 200                          * last 75 2K sectors, we decrease the saved size
 201                          * value.
 202                          */
 203                         if (sector < get_capacity(info->disk) &&
 204                             drive->probed_capacity - sector < 4 * 75)
 205                                 set_capacity(info->disk, sector);
 206                 }
 207         }
 208
 209         ide_cd_log_error(drive->name, failed_command, sense);
 210 }
 211
 212 static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense,
 213                                       struct request *failed_command)
 214 {
 215         struct cdrom_info *info         = drive->driver_data;
 216         struct request *rq              = &drive->request_sense_rq;
 217
 218         ide_debug_log(IDE_DBG_SENSE, "enter");
 219
 220         if (sense == NULL)
 221                 sense = &info->sense_data;
 222
 223         /* stuff the sense request in front of our current request */
 224         blk_rq_init(NULL, rq);
 225         rq->cmd_type = REQ_TYPE_ATA_PC;
 226         rq->rq_disk = info->disk;
 227
 228         rq->data = sense;
 229         rq->cmd[0] = GPCMD_REQUEST_SENSE;
 230         rq->cmd[4] = 18;
 231         rq->data_len = 18;
 232
 233         rq->cmd_type = REQ_TYPE_SENSE;
 234         rq->cmd_flags |= REQ_PREEMPT;
 235
 236         /* NOTE! Save the failed command in "rq->buffer" */
 237         rq->buffer = (void *) failed_command;
 238
 239         if (failed_command)
 240                 ide_debug_log(IDE_DBG_SENSE, "failed_cmd: 0x%x",
 241                                              failed_command->cmd[0]);
 242
 243         drive->hwif->rq = NULL;
 244
 245         elv_add_request(drive->queue, rq, ELEVATOR_INSERT_FRONT, 0);
 246 }
 247
 248 static void cdrom_end_request(ide_drive_t *drive, int uptodate)
 249 {
 250         struct request *rq = drive->hwif->rq;
 251         int nsectors = rq->hard_cur_sectors;
 252
 253         ide_debug_log(IDE_DBG_FUNC, "cmd: 0x%x, uptodate: 0x%x, nsectors: %d",
 254                                     rq->cmd[0], uptodate, nsectors);
 255
 256         if (blk_sense_request(rq) && uptodate) {
 257                 /*
 258                  * For REQ_TYPE_SENSE, "rq->buffer" points to the original
 259                  * failed request
 260                  */
 261                 struct request *failed = (struct request *) rq->buffer;
 262                 struct cdrom_info *info = drive->driver_data;
 263                 void *sense = &info->sense_data;
 264
 265                 if (failed) {
 266                         if (failed->sense) {
 267                                 sense = failed->sense;
 268                                 failed->sense_len = rq->sense_len;
 269                         }
 270                         cdrom_analyze_sense_data(drive, failed, sense);
 271                         /*
 272                          * now end the failed request
 273                          */
 274                         if (blk_fs_request(failed)) {
 275                                 if (ide_end_rq(drive, failed, -EIO,
 276                                                 failed->hard_nr_sectors << 9))
 277                                         BUG();
 278                         } else {
 279                                 if (blk_end_request(failed, -EIO,
 280                                                     failed->data_len))
 281                                         BUG();
 282                         }
 283                 } else
 284                         cdrom_analyze_sense_data(drive, NULL, sense);
 285         }
 286
 287         if (!rq->current_nr_sectors && blk_fs_request(rq))
 288                 uptodate = 1;
 289         /* make sure it's fully ended */
 290         if (blk_pc_request(rq))
 291                 nsectors = (rq->data_len + 511) >> 9;
 292         if (!nsectors)
 293                 nsectors = 1;
 294
 295         ide_debug_log(IDE_DBG_FUNC, "uptodate: 0x%x, nsectors: %d",
 296                                     uptodate, nsectors);
 297
 298         if (blk_fs_request(rq) == 0 && uptodate <= 0 && rq->errors == 0)
 299                 rq->errors = -EIO;
 300
 301         ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
 302 }
 303
 304 static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 st)
 305 {
 306         if (st & 0x80)
 307                 return;
 308         ide_dump_status(drive, msg, st);
 309 }
 310
 311 /*
 312  * Returns:
 313  * 0: if the request should be continued.
 314  * 1: if the request was ended.
 315  */
 316 static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
 317 {
 318         ide_hwif_t *hwif = drive->hwif;
 319         struct request *rq = hwif->rq;
 320         int stat, err, sense_key;
 321
 322         /* check for errors */
 323         stat = hwif->tp_ops->read_status(hwif);
 324
 325         if (stat_ret)
 326                 *stat_ret = stat;
 327
 328         if (OK_STAT(stat, good_stat, BAD_R_STAT))
 329                 return 0;
 330
 331         /* get the IDE error register */
 332         err = ide_read_error(drive);
 333         sense_key = err >> 4;
 334
 335         if (rq == NULL) {
 336                 printk(KERN_ERR PFX "%s: missing rq in %s\n",
 337                                 drive->name, __func__);
 338                 return 1;
 339         }
 340
 341         ide_debug_log(IDE_DBG_RQ, "stat: 0x%x, good_stat: 0x%x, cmd[0]: 0x%x, "
 342                                   "rq->cmd_type: 0x%x, err: 0x%x",
 343                                   stat, good_stat, rq->cmd[0], rq->cmd_type,
 344                                   err);
 345
 346         if (blk_sense_request(rq)) {
 347                 /*
 348                  * We got an error trying to get sense info from the drive
 349                  * (probably while trying to recover from a former error).
 350                  * Just give up.
 351                  */
 352                 rq->cmd_flags |= REQ_FAILED;
 353                 cdrom_end_request(drive, 0);
 354                 ide_error(drive, "request sense failure", stat);
 355                 return 1;
 356
 357         } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) {
 358                 /* All other functions, except for READ. */
 359
 360                 /*
 361                  * if we have an error, pass back CHECK_CONDITION as the
 362                  * scsi status byte
 363                  */
 364                 if (blk_pc_request(rq) && !rq->errors)
 365                         rq->errors = SAM_STAT_CHECK_CONDITION;
 366
 367                 /* check for tray open */
 368                 if (sense_key == NOT_READY) {
 369                         cdrom_saw_media_change(drive);
 370                 } else if (sense_key == UNIT_ATTENTION) {
 371                         /* check for media change */
 372                         cdrom_saw_media_change(drive);
 373                         return 0;
 374                 } else if (sense_key == ILLEGAL_REQUEST &&
 375                            rq->cmd[0] == GPCMD_START_STOP_UNIT) {
 376                         /*
 377                          * Don't print error message for this condition--
 378                          * SFF8090i indicates that 5/24/00 is the correct
 379                          * response to a request to close the tray if the
 380                          * drive doesn't have that capability.
 381                          * cdrom_log_sense() knows this!
 382                          */
 383                 } else if (!(rq->cmd_flags & REQ_QUIET)) {
 384                         /* otherwise, print an error */
 385                         ide_dump_status(drive, "packet command error", stat);
 386                 }
 387
 388                 rq->cmd_flags |= REQ_FAILED;
 389
 390                 /*
 391                  * instead of playing games with moving completions around,
 392                  * remove failed request completely and end it when the
 393                  * request sense has completed
 394                  */
 395                 goto end_request;
 396
 397         } else if (blk_fs_request(rq)) {
 398                 int do_end_request = 0;
 399
 400                 /* handle errors from READ and WRITE requests */
 401
 402                 if (blk_noretry_request(rq))
 403                         do_end_request = 1;
 404
 405                 if (sense_key == NOT_READY) {
 406                         /* tray open */
 407                         if (rq_data_dir(rq) == READ) {
 408                                 cdrom_saw_media_change(drive);
 409
 410                                 /* fail the request */
 411                                 printk(KERN_ERR PFX "%s: tray open\n",
 412                                                 drive->name);
 413                                 do_end_request = 1;
 414                         } else {
 415                                 struct cdrom_info *info = drive->driver_data;
 416
 417                                 /*
 418                                  * Allow the drive 5 seconds to recover, some
 419                                  * devices will return this error while flushing
 420                                  * data from cache.
 421                                  */
 422                                 if (!rq->errors)
 423                                         info->write_timeout = jiffies +
 424                                                         ATAPI_WAIT_WRITE_BUSY;
 425                                 rq->errors = 1;
 426                                 if (time_after(jiffies, info->write_timeout))
 427                                         do_end_request = 1;
 428                                 else {
 429                                         struct request_queue *q = drive->queue;
 430                                         unsigned long flags;
 431
 432                                         /*
 433                                          * take a breather relying on the unplug
 434                                          * timer to kick us again
 435                                          */
 436                                         spin_lock_irqsave(q->queue_lock, flags);
 437                                         blk_plug_device(q);
 438                                         spin_unlock_irqrestore(q->queue_lock, flags);
 439
 440                                         return 1;
 441                                 }
 442                         }
 443                 } else if (sense_key == UNIT_ATTENTION) {
 444                         /* media change */
 445                         cdrom_saw_media_change(drive);
 446
 447                         /*
 448                          * Arrange to retry the request but be sure to give up
 449                          * if we've retried too many times.
 450                          */
 451                         if (++rq->errors > ERROR_MAX)
 452                                 do_end_request = 1;
 453                 } else if (sense_key == ILLEGAL_REQUEST ||
 454                            sense_key == DATA_PROTECT) {
 455                         /*
 456                          * No point in retrying after an illegal request or data
 457                          * protect error.
 458                          */
 459                         ide_dump_status_no_sense(drive, "command error", stat);
 460                         do_end_request = 1;
 461                 } else if (sense_key == MEDIUM_ERROR) {
 462                         /*
 463                          * No point in re-trying a zillion times on a bad
 464                          * sector. If we got here the error is not correctable.
 465                          */
 466                         ide_dump_status_no_sense(drive,
 467                                                  "media error (bad sector)",
 468                                                  stat);
 469                         do_end_request = 1;
 470                 } else if (sense_key == BLANK_CHECK) {
 471                         /* disk appears blank ?? */
 472                         ide_dump_status_no_sense(drive, "media error (blank)",
 473                                                  stat);
 474                         do_end_request = 1;
 475                 } else if ((err & ~ATA_ABORTED) != 0) {
 476                         /* go to the default handler for other errors */
 477                         ide_error(drive, "cdrom_decode_status", stat);
 478                         return 1;
 479                 } else if ((++rq->errors > ERROR_MAX)) {
 480                         /* we've racked up too many retries, abort */
 481                         do_end_request = 1;
 482                 }
 483
 484                 /*
 485                  * End a request through request sense analysis when we have
 486                  * sense data. We need this in order to perform end of media
 487                  * processing.
 488                  */
 489                 if (do_end_request)
 490                         goto end_request;
 491
 492                 /*
 493                  * If we got a CHECK_CONDITION status, queue
 494                  * a request sense command.
 495                  */
 496                 if (stat & ATA_ERR)
 497                         cdrom_queue_request_sense(drive, NULL, NULL);
 498         } else {
 499                 blk_dump_rq_flags(rq, PFX "bad rq");
 500                 cdrom_end_request(drive, 0);
 501         }
 502
 503         /* retry, or handle the next request */
 504         return 1;
 505
 506 end_request:
 507         if (stat & ATA_ERR) {
 508                 struct request_queue *q = drive->queue;
 509                 unsigned long flags;
 510
 511                 spin_lock_irqsave(q->queue_lock, flags);
 512                 blkdev_dequeue_request(rq);
 513                 spin_unlock_irqrestore(q->queue_lock, flags);
 514
 515                 hwif->rq = NULL;
 516
 517                 cdrom_queue_request_sense(drive, rq->sense, rq);
 518         } else
 519                 cdrom_end_request(drive, 0);
 520
 521         return 1;
 522 }
 523
 524 /*
 525  * Check the contents of the interrupt reason register from the cdrom
 526  * and attempt to recover if there are problems.  Returns  0 if everything's
 527  * ok; nonzero if the request has been terminated.
 528  */
 529 static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
 530                                 int len, int ireason, int rw)
 531 {
 532         ide_hwif_t *hwif = drive->hwif;
 533
 534         ide_debug_log(IDE_DBG_FUNC, "ireason: 0x%x, rw: 0x%x", ireason, rw);
 535
 536         /*
 537          * ireason == 0: the drive wants to receive data from us
 538          * ireason == 2: the drive is expecting to transfer data to us
 539          */
 540         if (ireason == (!rw << 1))
 541                 return 0;
 542         else if (ireason == (rw << 1)) {
 543
 544                 /* whoops... */
 545                 printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n",
 546                                 drive->name, __func__);
 547
 548                 ide_pad_transfer(drive, rw, len);
 549         } else  if (rw == 0 && ireason == 1) {
 550                 /*
 551                  * Some drives (ASUS) seem to tell us that status info is
 552                  * available.  Just get it and ignore.
 553                  */
 554                 (void)hwif->tp_ops->read_status(hwif);
 555                 return 0;
 556         } else {
 557                 /* drive wants a command packet, or invalid ireason... */
 558                 printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n",
 559                                 drive->name, __func__, ireason);
 560         }
 561
 562         if (rq->cmd_type == REQ_TYPE_ATA_PC)
 563                 rq->cmd_flags |= REQ_FAILED;
 564
 565         cdrom_end_request(drive, 0);
 566         return -1;
 567 }
 568
 569 /*
 570  * Assume that the drive will always provide data in multiples of at least
 571  * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise.
 572  */
 573 static int ide_cd_check_transfer_size(ide_drive_t *drive, int len)
 574 {
 575         ide_debug_log(IDE_DBG_FUNC, "len: %d", len);
 576
 577         if ((len % SECTOR_SIZE) == 0)
 578                 return 0;
 579
 580         printk(KERN_ERR PFX "%s: %s: Bad transfer size %d\n", drive->name,
 581                         __func__, len);
 582
 583         if (drive->atapi_flags & IDE_AFLAG_LIMIT_NFRAMES)
 584                 printk(KERN_ERR PFX "This drive is not supported by this "
 585                                 "version of the driver\n");
 586         else {
 587                 printk(KERN_ERR PFX "Trying to limit transfer sizes\n");
 588                 drive->atapi_flags |= IDE_AFLAG_LIMIT_NFRAMES;
 589         }
 590
 591         return 1;
 592 }
 593
 594 static ide_startstop_t ide_cd_prepare_rw_request(ide_drive_t *drive,
 595                                                  struct request *rq)
 596 {
 597         ide_debug_log(IDE_DBG_RQ, "rq->cmd_flags: 0x%x", rq->cmd_flags);
 598
 599         if (rq_data_dir(rq) == READ) {
 600                 unsigned short sectors_per_frame =
 601                         queue_hardsect_size(drive->queue) >> SECTOR_BITS;
 602                 int nskip = rq->sector & (sectors_per_frame - 1);
 603
 604                 /*
 605                  * If the requested sector doesn't start on a frame boundary,
 606                  * we must adjust the start of the transfer so that it does,
 607                  * and remember to skip the first few sectors.
 608                  *
 609                  * If the rq->current_nr_sectors field is larger than the size
 610                  * of the buffer, it will mean that we're to skip a number of
 611                  * sectors equal to the amount by which rq->current_nr_sectors
 612                  * is larger than the buffer size.
 613                  */
 614                 if (nskip > 0) {
 615                         /* sanity check... */
 616                         if (rq->current_nr_sectors !=
 617                             bio_cur_sectors(rq->bio)) {
 618                                 printk(KERN_ERR PFX "%s: %s: buffer botch (%u)\n",
 619                                                 drive->name, __func__,
 620                                                 rq->current_nr_sectors);
 621                                 cdrom_end_request(drive, 0);
 622                                 return ide_stopped;
 623                         }
 624                         rq->current_nr_sectors += nskip;
 625                 }
 626         }
 627
 628         /* set up the command */
 629         rq->timeout = ATAPI_WAIT_PC;
 630
 631         return ide_started;
 632 }
 633
 634 /*
 635  * Fix up a possibly partially-processed request so that we can start it over
 636  * entirely, or even put it back on the request queue.
 637  */
 638 static void ide_cd_restore_request(ide_drive_t *drive, struct request *rq)
 639 {
 640
 641         ide_debug_log(IDE_DBG_FUNC, "enter");
 642
 643         if (rq->buffer != bio_data(rq->bio)) {
 644                 sector_t n =
 645                         (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE;
 646
 647                 rq->buffer = bio_data(rq->bio);
 648                 rq->nr_sectors += n;
 649                 rq->sector -= n;
 650         }
 651         rq->current_nr_sectors = bio_cur_sectors(rq->bio);
 652         rq->hard_cur_sectors = rq->current_nr_sectors;
 653         rq->hard_nr_sectors = rq->nr_sectors;
 654         rq->hard_sector = rq->sector;
 655         rq->q->prep_rq_fn(rq->q, rq);
 656 }
 657
 658 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct request *rq)
 659 {
 660         ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]);
 661
 662         /*
 663          * Some of the trailing request sense fields are optional,
 664          * and some drives don't send them.  Sigh.
 665          */
 666         if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
 667             rq->data_len > 0 && rq->data_len <= 5)
 668                 while (rq->data_len > 0) {
 669                         *(u8 *)rq->data++ = 0;
 670                         --rq->data_len;
 671                 }
 672 }
 673
 674 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
 675                     int write, void *buffer, unsigned *bufflen,
 676                     struct request_sense *sense, int timeout,
 677                     unsigned int cmd_flags)
 678 {
 679         struct cdrom_info *info = drive->driver_data;
 680         struct request_sense local_sense;
 681         int retries = 10;
 682         unsigned int flags = 0;
 683
 684         if (!sense)
 685                 sense = &local_sense;
 686
 687         ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, "
 688                                   "cmd_flags: 0x%x",
 689                                   cmd[0], write, timeout, cmd_flags);
 690
 691         /* start of retry loop */
 692         do {
 693                 struct request *rq;
 694                 int error;
 695
 696                 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
 697
 698                 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
 699                 rq->cmd_type = REQ_TYPE_ATA_PC;
 700                 rq->sense = sense;
 701                 rq->cmd_flags |= cmd_flags;
 702                 rq->timeout = timeout;
 703                 if (buffer) {
 704                         rq->data = buffer;
 705                         rq->data_len = *bufflen;
 706                 }
 707
 708                 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
 709
 710                 if (buffer)
 711                         *bufflen = rq->data_len;
 712
 713                 flags = rq->cmd_flags;
 714                 blk_put_request(rq);
 715
 716                 /*
 717                  * FIXME: we should probably abort/retry or something in case of
 718                  * failure.
 719                  */
 720                 if (flags & REQ_FAILED) {
 721                         /*
 722                          * The request failed.  Retry if it was due to a unit
 723                          * attention status (usually means media was changed).
 724                          */
 725                         struct request_sense *reqbuf = sense;
 726
 727                         if (reqbuf->sense_key == UNIT_ATTENTION)
 728                                 cdrom_saw_media_change(drive);
 729                         else if (reqbuf->sense_key == NOT_READY &&
 730                                  reqbuf->asc == 4 && reqbuf->ascq != 4) {
 731                                 /*
 732                                  * The drive is in the process of loading
 733                                  * a disk.  Retry, but wait a little to give
 734                                  * the drive time to complete the load.
 735                                  */
 736                                 ssleep(2);
 737                         } else {
 738                                 /* otherwise, don't retry */
 739                                 retries = 0;
 740                         }
 741                         --retries;
 742                 }
 743
 744                 /* end of retry loop */
 745         } while ((flags & REQ_FAILED) && retries >= 0);
 746
 747         /* return an error if the command failed */
 748         return (flags & REQ_FAILED) ? -EIO : 0;
 749 }
 750
 751 /*
 752  * Called from blk_end_request_callback() after the data of the request is
 753  * completed and before the request itself is completed. By returning value '1',
 754  * blk_end_request_callback() returns immediately without completing it.
 755  */
 756 static int cdrom_newpc_intr_dummy_cb(struct request *rq)
 757 {
 758         return 1;
 759 }
 760
 761 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 762 {
 763         ide_hwif_t *hwif = drive->hwif;
 764         struct request *rq = hwif->rq;
 765         xfer_func_t *xferfunc;
 766         ide_expiry_t *expiry = NULL;
 767         int dma_error = 0, dma, stat, thislen, uptodate = 0;
 768         int write = (rq_data_dir(rq) == WRITE) ? 1 : 0;
 769         unsigned int timeout;
 770         u16 len;
 771         u8 ireason;
 772
 773         ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x",
 774                                   rq->cmd[0], write);
 775
 776         /* check for errors */
 777         dma = drive->dma;
 778         if (dma) {
 779                 drive->dma = 0;
 780                 dma_error = hwif->dma_ops->dma_end(drive);
 781                 if (dma_error) {
 782                         printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
 783                                         write ? "write" : "read");
 784                         ide_dma_off(drive);
 785                 }
 786         }
 787
 788         if (cdrom_decode_status(drive, 0, &stat))
 789                 return ide_stopped;
 790
 791         /* using dma, transfer is complete now */
 792         if (dma) {
 793                 if (dma_error)
 794                         return ide_error(drive, "dma error", stat);
 795                 if (blk_fs_request(rq)) {
 796                         ide_complete_rq(drive, 0, rq->nr_sectors
 797                                 ? (rq->nr_sectors << 9) : ide_rq_bytes(rq));
 798                         return ide_stopped;
 799                 } else if (rq->cmd_type == REQ_TYPE_ATA_PC && !rq->bio) {
 800                         ide_complete_rq(drive, 0, 512);
 801                         return ide_stopped;
 802                 }
 803                 goto end_request;
 804         }
 805
 806         ide_read_bcount_and_ireason(drive, &len, &ireason);
 807
 808         thislen = blk_fs_request(rq) ? len : rq->data_len;
 809         if (thislen > len)
 810                 thislen = len;
 811
 812         ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d",
 813                                   stat, thislen);
 814
 815         /* If DRQ is clear, the command has completed. */
 816         if ((stat & ATA_DRQ) == 0) {
 817                 if (blk_fs_request(rq)) {
 818                         /*
 819                          * If we're not done reading/writing, complain.
 820                          * Otherwise, complete the command normally.
 821                          */
 822                         uptodate = 1;
 823                         if (rq->current_nr_sectors > 0) {
 824                                 printk(KERN_ERR PFX "%s: %s: data underrun "
 825                                                 "(%d blocks)\n",
 826                                                 drive->name, __func__,
 827                                                 rq->current_nr_sectors);
 828                                 if (!write)
 829                                         rq->cmd_flags |= REQ_FAILED;
 830                                 uptodate = 0;
 831                         }
 832                         cdrom_end_request(drive, uptodate);
 833                         return ide_stopped;
 834                 } else if (!blk_pc_request(rq)) {
 835                         ide_cd_request_sense_fixup(drive, rq);
 836                         /* complain if we still have data left to transfer */
 837                         uptodate = rq->data_len ? 0 : 1;
 838                 }
 839                 goto end_request;
 840         }
 841
 842         /* check which way to transfer data */
 843         if (ide_cd_check_ireason(drive, rq, len, ireason, write))
 844                 return ide_stopped;
 845
 846         if (blk_fs_request(rq)) {
 847                 if (write == 0) {
 848                         int nskip;
 849
 850                         if (ide_cd_check_transfer_size(drive, len)) {
 851                                 cdrom_end_request(drive, 0);
 852                                 return ide_stopped;
 853                         }
 854
 855                         /*
 856                          * First, figure out if we need to bit-bucket
 857                          * any of the leading sectors.
 858                          */
 859                         nskip = min_t(int, rq->current_nr_sectors
 860                                            - bio_cur_sectors(rq->bio),
 861                                            thislen >> 9);
 862                         if (nskip > 0) {
 863                                 ide_pad_transfer(drive, write, nskip << 9);
 864                                 rq->current_nr_sectors -= nskip;
 865                                 thislen -= (nskip << 9);
 866                         }
 867                 }
 868         }
 869
 870         if (ireason == 0) {
 871                 write = 1;
 872                 xferfunc = hwif->tp_ops->output_data;
 873         } else {
 874                 write = 0;
 875                 xferfunc = hwif->tp_ops->input_data;
 876         }
 877
 878         ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, "
 879                                   "ireason: 0x%x",
 880                                   rq->cmd_type, ireason);
 881
 882         /* transfer data */
 883         while (thislen > 0) {
 884                 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data;
 885                 int blen = rq->data_len;
 886
 887                 /* bio backed? */
 888                 if (rq->bio) {
 889                         if (blk_fs_request(rq)) {
 890                                 ptr = rq->buffer;
 891                                 blen = rq->current_nr_sectors << 9;
 892                         } else {
 893                                 ptr = bio_data(rq->bio);
 894                                 blen = bio_iovec(rq->bio)->bv_len;
 895                         }
 896                 }
 897
 898                 if (!ptr) {
 899                         if (blk_fs_request(rq) && !write)
 900                                 /*
 901                                  * If the buffers are full, pipe the rest into
 902                                  * oblivion.
 903                                  */
 904                                 ide_pad_transfer(drive, 0, thislen);
 905                         else {
 906                                 printk(KERN_ERR PFX "%s: confused, missing data\n",
 907                                                 drive->name);
 908                                 blk_dump_rq_flags(rq, rq_data_dir(rq)
 909                                                   ? "cdrom_newpc_intr, write"
 910                                                   : "cdrom_newpc_intr, read");
 911                         }
 912                         break;
 913                 }
 914
 915                 if (blen > thislen)
 916                         blen = thislen;
 917
 918                 xferfunc(drive, NULL, ptr, blen);
 919
 920                 thislen -= blen;
 921                 len -= blen;
 922
 923                 if (blk_fs_request(rq)) {
 924                         rq->buffer += blen;
 925                         rq->nr_sectors -= (blen >> 9);
 926                         rq->current_nr_sectors -= (blen >> 9);
 927                         rq->sector += (blen >> 9);
 928
 929                         if (rq->current_nr_sectors == 0 && rq->nr_sectors)
 930                                 cdrom_end_request(drive, 1);
 931                 } else {
 932                         rq->data_len -= blen;
 933
 934                         /*
 935                          * The request can't be completed until DRQ is cleared.
 936                          * So complete the data, but don't complete the request
 937                          * using the dummy function for the callback feature
 938                          * of blk_end_request_callback().
 939                          */
 940                         if (rq->bio)
 941                                 blk_end_request_callback(rq, 0, blen,
 942                                                  cdrom_newpc_intr_dummy_cb);
 943                         else
 944                                 rq->data += blen;
 945                 }
 946                 if (!write && blk_sense_request(rq))
 947                         rq->sense_len += blen;
 948         }
 949
 950         /* pad, if necessary */
 951         if (!blk_fs_request(rq) && len > 0)
 952                 ide_pad_transfer(drive, write, len);
 953
 954         if (blk_pc_request(rq)) {
 955                 timeout = rq->timeout;
 956         } else {
 957                 timeout = ATAPI_WAIT_PC;
 958                 if (!blk_fs_request(rq))
 959                         expiry = ide_cd_expiry;
 960         }
 961
 962         hwif->expiry = expiry;
 963         ide_set_handler(drive, cdrom_newpc_intr, timeout);
 964         return ide_started;
 965
 966 end_request:
 967         if (blk_pc_request(rq)) {
 968                 unsigned int dlen = rq->data_len;
 969
 970                 if (dma)
 971                         rq->data_len = 0;
 972
 973                 if (blk_end_request(rq, 0, dlen))
 974                         BUG();
 975
 976                 hwif->rq = NULL;
 977         } else {
 978                 if (!uptodate)
 979                         rq->cmd_flags |= REQ_FAILED;
 980                 cdrom_end_request(drive, uptodate);
 981         }
 982         return ide_stopped;
 983 }
 984
 985 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
 986 {
 987         struct cdrom_info *cd = drive->driver_data;
 988         int write = rq_data_dir(rq) == WRITE;
 989         unsigned short sectors_per_frame =
 990                 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
 991
 992         ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, write: 0x%x, "
 993                                   "secs_per_frame: %u",
 994                                   rq->cmd[0], write, sectors_per_frame);
 995
 996         if (write) {
 997                 /* disk has become write protected */
 998                 if (get_disk_ro(cd->disk)) {
 999                         cdrom_end_request(drive, 0);
1000                         return ide_stopped;
1001                 }
1002         } else {
1003                 /*
1004                  * We may be retrying this request after an error.  Fix up any
1005                  * weirdness which might be present in the request packet.
1006                  */
1007                 ide_cd_restore_request(drive, rq);
1008         }
1009
1010         /* use DMA, if possible / writes *must* be hardware frame aligned */
1011         if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
1012             (rq->sector & (sectors_per_frame - 1))) {
1013                 if (write) {
1014                         cdrom_end_request(drive, 0);
1015                         return ide_stopped;
1016                 }
1017                 drive->dma = 0;
1018         } else
1019                 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1020
1021         if (write)
1022                 cd->devinfo.media_written = 1;
1023
1024         return ide_started;
1025 }
1026
1027 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
1028 {
1029
1030         ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
1031                                   rq->cmd[0], rq->cmd_type);
1032
1033         if (blk_pc_request(rq))
1034                 rq->cmd_flags |= REQ_QUIET;
1035         else
1036                 rq->cmd_flags &= ~REQ_FAILED;
1037
1038         drive->dma = 0;
1039
1040         /* sg request */
1041         if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) {
1042                 struct request_queue *q = drive->queue;
1043                 unsigned int alignment;
1044                 char *buf;
1045
1046                 if (rq->bio)
1047                         buf = bio_data(rq->bio);
1048                 else
1049                         buf = rq->data;
1050
1051                 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1052
1053                 /*
1054                  * check if dma is safe
1055                  *
1056                  * NOTE! The "len" and "addr" checks should possibly have
1057                  * separate masks.
1058                  */
1059                 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
1060                 if ((unsigned long)buf & alignment
1061                     || rq->data_len & q->dma_pad_mask
1062                     || object_is_on_stack(buf))
1063                         drive->dma = 0;
1064         }
1065 }
1066
1067 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
1068                                         sector_t block)
1069 {
1070         struct ide_cmd cmd;
1071
1072         ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
1073                                   rq->cmd[0], (unsigned long long)block);
1074
1075         if (drive->debug_mask & IDE_DBG_RQ)
1076                 blk_dump_rq_flags(rq, "ide_cd_do_request");
1077
1078         if (blk_fs_request(rq)) {
1079                 if (cdrom_start_rw(drive, rq) == ide_stopped)
1080                         return ide_stopped;
1081
1082                 if (ide_cd_prepare_rw_request(drive, rq) == ide_stopped)
1083                         return ide_stopped;
1084         } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
1085                    rq->cmd_type == REQ_TYPE_ATA_PC) {
1086                 if (!rq->timeout)
1087                         rq->timeout = ATAPI_WAIT_PC;
1088
1089                 cdrom_do_block_pc(drive, rq);
1090         } else if (blk_special_request(rq)) {
1091                 /* right now this can only be a reset... */
1092                 cdrom_end_request(drive, 1);
1093                 return ide_stopped;
1094         } else {
1095                 blk_dump_rq_flags(rq, DRV_NAME " bad flags");
1096                 cdrom_end_request(drive, 0);
1097                 return ide_stopped;
1098         }
1099
1100         memset(&cmd, 0, sizeof(cmd));
1101
1102         if (rq_data_dir(rq))
1103                 cmd.tf_flags |= IDE_TFLAG_WRITE;
1104
1105         cmd.rq = rq;
1106
1107         return ide_issue_pc(drive, &cmd);
1108 }
1109
1110 /*
1111  * Ioctl handling.
1112  *
1113  * Routines which queue packet commands take as a final argument a pointer to a
1114  * request_sense struct. If execution of the command results in an error with a
1115  * CHECK CONDITION status, this structure will be filled with the results of the
1116  * subsequent request sense command. The pointer can also be NULL, in which case
1117  * no sense information is returned.
1118  */
1119 static void msf_from_bcd(struct atapi_msf *msf)
1120 {
1121         msf->minute = bcd2bin(msf->minute);
1122         msf->second = bcd2bin(msf->second);
1123         msf->frame  = bcd2bin(msf->frame);
1124 }
1125
1126 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
1127 {
1128         struct cdrom_info *info = drive->driver_data;
1129         struct cdrom_device_info *cdi = &info->devinfo;
1130         unsigned char cmd[BLK_MAX_CDB];
1131
1132         ide_debug_log(IDE_DBG_FUNC, "enter");
1133
1134         memset(cmd, 0, BLK_MAX_CDB);
1135         cmd[0] = GPCMD_TEST_UNIT_READY;
1136
1137         /*
1138          * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
1139          * instead of supporting the LOAD_UNLOAD opcode.
1140          */
1141         cmd[7] = cdi->sanyo_slot % 3;
1142
1143         return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
1144 }
1145
1146 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
1147                                unsigned long *sectors_per_frame,
1148                                struct request_sense *sense)
1149 {
1150         struct {
1151                 __be32 lba;
1152                 __be32 blocklen;
1153         } capbuf;
1154
1155         int stat;
1156         unsigned char cmd[BLK_MAX_CDB];
1157         unsigned len = sizeof(capbuf);
1158         u32 blocklen;
1159
1160         ide_debug_log(IDE_DBG_FUNC, "enter");
1161
1162         memset(cmd, 0, BLK_MAX_CDB);
1163         cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1164
1165         stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
1166                                REQ_QUIET);
1167         if (stat)
1168                 return stat;
1169
1170         /*
1171          * Sanity check the given block size
1172          */
1173         blocklen = be32_to_cpu(capbuf.blocklen);
1174         switch (blocklen) {
1175         case 512:
1176         case 1024:
1177         case 2048:
1178         case 4096:
1179                 break;
1180         default:
1181                 printk(KERN_ERR PFX "%s: weird block size %u\n",
1182                                 drive->name, blocklen);
1183                 printk(KERN_ERR PFX "%s: default to 2kb block size\n",
1184                                 drive->name);
1185                 blocklen = 2048;
1186                 break;
1187         }
1188
1189         *capacity = 1 + be32_to_cpu(capbuf.lba);
1190         *sectors_per_frame = blocklen >> SECTOR_BITS;
1191
1192         ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu",
1193                                      *capacity, *sectors_per_frame);
1194
1195         return 0;
1196 }
1197
1198 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1199                                 int format, char *buf, int buflen,
1200                                 struct request_sense *sense)
1201 {
1202         unsigned char cmd[BLK_MAX_CDB];
1203
1204         ide_debug_log(IDE_DBG_FUNC, "enter");
1205
1206         memset(cmd, 0, BLK_MAX_CDB);
1207
1208         cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1209         cmd[6] = trackno;
1210         cmd[7] = (buflen >> 8);
1211         cmd[8] = (buflen & 0xff);
1212         cmd[9] = (format << 6);
1213
1214         if (msf_flag)
1215                 cmd[1] = 2;
1216
1217         return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
1218 }
1219
1220 /* Try to read the entire TOC for the disk into our internal buffer. */
1221 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1222 {
1223         int stat, ntracks, i;
1224         struct cdrom_info *info = drive->driver_data;
1225         struct cdrom_device_info *cdi = &info->devinfo;
1226         struct atapi_toc *toc = info->toc;
1227         struct {
1228                 struct atapi_toc_header hdr;
1229                 struct atapi_toc_entry  ent;
1230         } ms_tmp;
1231         long last_written;
1232         unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1233
1234         ide_debug_log(IDE_DBG_FUNC, "enter");
1235
1236         if (toc == NULL) {
1237                 /* try to allocate space */
1238                 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1239                 if (toc == NULL) {
1240                         printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
1241                                         drive->name);
1242                         return -ENOMEM;
1243                 }
1244                 info->toc = toc;
1245         }
1246
1247         /*
1248          * Check to see if the existing data is still valid. If it is,
1249          * just return.
1250          */
1251         (void) cdrom_check_status(drive, sense);
1252
1253         if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
1254                 return 0;
1255
1256         /* try to get the total cdrom capacity and sector size */
1257         stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1258                                    sense);
1259         if (stat)
1260                 toc->capacity = 0x1fffff;
1261
1262         set_capacity(info->disk, toc->capacity * sectors_per_frame);
1263         /* save a private copy of the TOC capacity for error handling */
1264         drive->probed_capacity = toc->capacity * sectors_per_frame;
1265
1266         blk_queue_hardsect_size(drive->queue,
1267                                 sectors_per_frame << SECTOR_BITS);
1268
1269         /* first read just the header, so we know how long the TOC is */
1270         stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1271                                     sizeof(struct atapi_toc_header), sense);
1272         if (stat)
1273                 return stat;
1274
1275         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1276                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1277                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1278         }
1279
1280         ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1281         if (ntracks <= 0)
1282                 return -EIO;
1283         if (ntracks > MAX_TRACKS)
1284                 ntracks = MAX_TRACKS;
1285
1286         /* now read the whole schmeer */
1287         stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1288                                   (char *)&toc->hdr,
1289                                    sizeof(struct atapi_toc_header) +
1290                                    (ntracks + 1) *
1291                                    sizeof(struct atapi_toc_entry), sense);
1292
1293         if (stat && toc->hdr.first_track > 1) {
1294                 /*
1295                  * Cds with CDI tracks only don't have any TOC entries, despite
1296                  * of this the returned values are
1297                  * first_track == last_track = number of CDI tracks + 1,
1298                  * so that this case is indistinguishable from the same layout
1299                  * plus an additional audio track. If we get an error for the
1300                  * regular case, we assume a CDI without additional audio
1301                  * tracks. In this case the readable TOC is empty (CDI tracks
1302                  * are not included) and only holds the Leadout entry.
1303                  *
1304                  * Heiko Eißfeldt.
1305                  */
1306                 ntracks = 0;
1307                 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1308                                            (char *)&toc->hdr,
1309                                            sizeof(struct atapi_toc_header) +
1310                                            (ntracks + 1) *
1311                                            sizeof(struct atapi_toc_entry),
1312                                            sense);
1313                 if (stat)
1314                         return stat;
1315
1316                 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1317                         toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1318                         toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1319                 } else {
1320                         toc->hdr.first_track = CDROM_LEADOUT;
1321                         toc->hdr.last_track = CDROM_LEADOUT;
1322                 }
1323         }
1324
1325         if (stat)
1326                 return stat;
1327
1328         toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1329
1330         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1331                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1332                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1333         }
1334
1335         for (i = 0; i <= ntracks; i++) {
1336                 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1337                         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1338                                 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1339                         msf_from_bcd(&toc->ent[i].addr.msf);
1340                 }
1341                 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1342                                                   toc->ent[i].addr.msf.second,
1343                                                   toc->ent[i].addr.msf.frame);
1344         }
1345
1346         if (toc->hdr.first_track != CDROM_LEADOUT) {
1347                 /* read the multisession information */
1348                 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1349                                            sizeof(ms_tmp), sense);
1350                 if (stat)
1351                         return stat;
1352
1353                 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1354         } else {
1355                 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1356                 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1357                 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1358         }
1359
1360         if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1361                 /* re-read multisession information using MSF format */
1362                 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1363                                            sizeof(ms_tmp), sense);
1364                 if (stat)
1365                         return stat;
1366
1367                 msf_from_bcd(&ms_tmp.ent.addr.msf);
1368                 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1369                                                    ms_tmp.ent.addr.msf.second,
1370                                                    ms_tmp.ent.addr.msf.frame);
1371         }
1372
1373         toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1374
1375         /* now try to get the total cdrom capacity */
1376         stat = cdrom_get_last_written(cdi, &last_written);
1377         if (!stat && (last_written > toc->capacity)) {
1378                 toc->capacity = last_written;
1379                 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1380                 drive->probed_capacity = toc->capacity * sectors_per_frame;
1381         }
1382
1383         /* Remember that we've read this stuff. */
1384         drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1385
1386         return 0;
1387 }
1388
1389 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1390 {
1391         struct cdrom_info *info = drive->driver_data;
1392         struct cdrom_device_info *cdi = &info->devinfo;
1393         struct packet_command cgc;
1394         int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1395
1396         ide_debug_log(IDE_DBG_FUNC, "enter");
1397
1398         if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1399                 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1400
1401         init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1402         do {
1403                 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1404                 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1405                 if (!stat)
1406                         break;
1407         } while (--attempts);
1408         return stat;
1409 }
1410
1411 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1412 {
1413         struct cdrom_info *cd = drive->driver_data;
1414         u16 curspeed, maxspeed;
1415
1416         ide_debug_log(IDE_DBG_FUNC, "enter");
1417
1418         if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1419                 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1420                 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1421         } else {
1422                 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1423                 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1424         }
1425
1426         ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u",
1427                                      curspeed, maxspeed);
1428
1429         cd->current_speed = (curspeed + (176/2)) / 176;
1430         cd->max_speed = (maxspeed + (176/2)) / 176;
1431 }
1432
1433 #define IDE_CD_CAPABILITIES \
1434         (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1435          CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1436          CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1437          CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1438          CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1439
1440 static struct cdrom_device_ops ide_cdrom_dops = {
1441         .open                   = ide_cdrom_open_real,
1442         .release                = ide_cdrom_release_real,
1443         .drive_status           = ide_cdrom_drive_status,
1444         .media_changed          = ide_cdrom_check_media_change_real,
1445         .tray_move              = ide_cdrom_tray_move,
1446         .lock_door              = ide_cdrom_lock_door,
1447         .select_speed           = ide_cdrom_select_speed,
1448         .get_last_session       = ide_cdrom_get_last_session,
1449         .get_mcn                = ide_cdrom_get_mcn,
1450         .reset                  = ide_cdrom_reset,
1451         .audio_ioctl            = ide_cdrom_audio_ioctl,
1452         .capability             = IDE_CD_CAPABILITIES,
1453         .generic_packet         = ide_cdrom_packet,
1454 };
1455
1456 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1457 {
1458         struct cdrom_info *info = drive->driver_data;
1459         struct cdrom_device_info *devinfo = &info->devinfo;
1460
1461         ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots);
1462
1463         devinfo->ops = &ide_cdrom_dops;
1464         devinfo->speed = info->current_speed;
1465         devinfo->capacity = nslots;
1466         devinfo->handle = drive;
1467         strcpy(devinfo->name, drive->name);
1468
1469         if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1470                 devinfo->mask |= CDC_SELECT_SPEED;
1471
1472         devinfo->disk = info->disk;
1473         return register_cdrom(devinfo);
1474 }
1475
1476 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1477 {
1478         struct cdrom_info *cd = drive->driver_data;
1479         struct cdrom_device_info *cdi = &cd->devinfo;
1480         u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1481         mechtype_t mechtype;
1482         int nslots = 1;
1483
1484         ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx",
1485                                      drive->media, drive->atapi_flags);
1486
1487         cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1488                      CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1489                      CDC_MO_DRIVE | CDC_RAM);
1490
1491         if (drive->media == ide_optical) {
1492                 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1493                 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1494                                 drive->name);
1495                 return nslots;
1496         }
1497
1498         if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1499                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1500                 cdi->mask &= ~CDC_PLAY_AUDIO;
1501                 return nslots;
1502         }
1503
1504         /*
1505          * We have to cheat a little here. the packet will eventually be queued
1506          * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1507          * Since this device hasn't been registered with the Uniform layer yet,
1508          * it can't do this. Same goes for cdi->ops.
1509          */
1510         cdi->handle = drive;
1511         cdi->ops = &ide_cdrom_dops;
1512
1513         if (ide_cdrom_get_capabilities(drive, buf))
1514                 return 0;
1515
1516         if ((buf[8 + 6] & 0x01) == 0)
1517                 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1518         if (buf[8 + 6] & 0x08)
1519                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1520         if (buf[8 + 3] & 0x01)
1521                 cdi->mask &= ~CDC_CD_R;
1522         if (buf[8 + 3] & 0x02)
1523                 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1524         if (buf[8 + 2] & 0x38)
1525                 cdi->mask &= ~CDC_DVD;
1526         if (buf[8 + 3] & 0x20)
1527                 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1528         if (buf[8 + 3] & 0x10)
1529                 cdi->mask &= ~CDC_DVD_R;
1530         if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1531                 cdi->mask &= ~CDC_PLAY_AUDIO;
1532
1533         mechtype = buf[8 + 6] >> 5;
1534         if (mechtype == mechtype_caddy ||
1535             mechtype == mechtype_popup ||
1536             (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1537                 cdi->mask |= CDC_CLOSE_TRAY;
1538
1539         if (cdi->sanyo_slot > 0) {
1540                 cdi->mask &= ~CDC_SELECT_DISC;
1541                 nslots = 3;
1542         } else if (mechtype == mechtype_individual_changer ||
1543                    mechtype == mechtype_cartridge_changer) {
1544                 nslots = cdrom_number_of_slots(cdi);
1545                 if (nslots > 1)
1546                         cdi->mask &= ~CDC_SELECT_DISC;
1547         }
1548
1549         ide_cdrom_update_speed(drive, buf);
1550
1551         printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1552
1553         /* don't print speed if the drive reported 0 */
1554         if (cd->max_speed)
1555                 printk(KERN_CONT " %dX", cd->max_speed);
1556
1557         printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1558
1559         if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1560                 printk(KERN_CONT " DVD%s%s",
1561                                  (cdi->mask & CDC_DVD_R) ? "" : "-R",
1562                                  (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1563
1564         if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1565                 printk(KERN_CONT " CD%s%s",
1566                                  (cdi->mask & CDC_CD_R) ? "" : "-R",
1567                                  (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1568
1569         if ((cdi->mask & CDC_SELECT_DISC) == 0)
1570                 printk(KERN_CONT " changer w/%d slots", nslots);
1571         else
1572                 printk(KERN_CONT " drive");
1573
1574         printk(KERN_CONT ", %dkB Cache\n",
1575                          be16_to_cpup((__be16 *)&buf[8 + 12]));
1576
1577         return nslots;
1578 }
1579
1580 /* standard prep_rq_fn that builds 10 byte cmds */
1581 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1582 {
1583         int hard_sect = queue_hardsect_size(q);
1584         long block = (long)rq->hard_sector / (hard_sect >> 9);
1585         unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1586
1587         memset(rq->cmd, 0, BLK_MAX_CDB);
1588
1589         if (rq_data_dir(rq) == READ)
1590                 rq->cmd[0] = GPCMD_READ_10;
1591         else
1592                 rq->cmd[0] = GPCMD_WRITE_10;
1593
1594         /*
1595          * fill in lba
1596          */
1597         rq->cmd[2] = (block >> 24) & 0xff;
1598         rq->cmd[3] = (block >> 16) & 0xff;
1599         rq->cmd[4] = (block >>  8) & 0xff;
1600         rq->cmd[5] = block & 0xff;
1601
1602         /*
1603          * and transfer length
1604          */
1605         rq->cmd[7] = (blocks >> 8) & 0xff;
1606         rq->cmd[8] = blocks & 0xff;
1607         rq->cmd_len = 10;
1608         return BLKPREP_OK;
1609 }
1610
1611 /*
1612  * Most of the SCSI commands are supported directly by ATAPI devices.
1613  * This transform handles the few exceptions.
1614  */
1615 static int ide_cdrom_prep_pc(struct request *rq)
1616 {
1617         u8 *c = rq->cmd;
1618
1619         /* transform 6-byte read/write commands to the 10-byte version */
1620         if (c[0] == READ_6 || c[0] == WRITE_6) {
1621                 c[8] = c[4];
1622                 c[5] = c[3];
1623                 c[4] = c[2];
1624                 c[3] = c[1] & 0x1f;
1625                 c[2] = 0;
1626                 c[1] &= 0xe0;
1627                 c[0] += (READ_10 - READ_6);
1628                 rq->cmd_len = 10;
1629                 return BLKPREP_OK;
1630         }
1631
1632         /*
1633          * it's silly to pretend we understand 6-byte sense commands, just
1634          * reject with ILLEGAL_REQUEST and the caller should take the
1635          * appropriate action
1636          */
1637         if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1638                 rq->errors = ILLEGAL_REQUEST;
1639                 return BLKPREP_KILL;
1640         }
1641
1642         return BLKPREP_OK;
1643 }
1644
1645 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1646 {
1647         if (blk_fs_request(rq))
1648                 return ide_cdrom_prep_fs(q, rq);
1649         else if (blk_pc_request(rq))
1650                 return ide_cdrom_prep_pc(rq);
1651
1652         return 0;
1653 }
1654
1655 struct cd_list_entry {
1656         const char      *id_model;
1657         const char      *id_firmware;
1658         unsigned int    cd_flags;
1659 };
1660
1661 #ifdef CONFIG_IDE_PROC_FS
1662 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1663 {
1664         unsigned long capacity, sectors_per_frame;
1665
1666         if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1667                 return 0;
1668
1669         return capacity * sectors_per_frame;
1670 }
1671
1672 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1673                                         int count, int *eof, void *data)
1674 {
1675         ide_drive_t *drive = data;
1676         int len;
1677
1678         len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1679         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1680 }
1681
1682 static ide_proc_entry_t idecd_proc[] = {
1683         { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1684         { NULL, 0, NULL, NULL }
1685 };
1686
1687 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1688 {
1689         return idecd_proc;
1690 }
1691
1692 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1693 {
1694         return NULL;
1695 }
1696 #endif
1697
1698 static const struct cd_list_entry ide_cd_quirks_list[] = {
1699         /* Limit transfer size per interrupt. */
1700         { "SAMSUNG CD-ROM SCR-2430", NULL,   IDE_AFLAG_LIMIT_NFRAMES         },
1701         { "SAMSUNG CD-ROM SCR-2432", NULL,   IDE_AFLAG_LIMIT_NFRAMES         },
1702         /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1703         { "SAMSUNG CD-ROM SCR-3231", NULL,   IDE_AFLAG_NO_SPEED_SELECT       },
1704         /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1705         { "NEC CD-ROM DRIVE:260",    "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1706                                              IDE_AFLAG_PRE_ATAPI12,          },
1707         /* Vertos 300, some versions of this drive like to talk BCD. */
1708         { "V003S0DS",                NULL,   IDE_AFLAG_VERTOS_300_SSD,       },
1709         /* Vertos 600 ESD. */
1710         { "V006E0DS",                NULL,   IDE_AFLAG_VERTOS_600_ESD,       },
1711         /*
1712          * Sanyo 3 CD changer uses a non-standard command for CD changing
1713          * (by default standard ATAPI support for CD changers is used).
1714          */
1715         { "CD-ROM CDR-C3 G",         NULL,   IDE_AFLAG_SANYO_3CD             },
1716         { "CD-ROM CDR-C3G",          NULL,   IDE_AFLAG_SANYO_3CD             },
1717         { "CD-ROM CDR_C36",          NULL,   IDE_AFLAG_SANYO_3CD             },
1718         /* Stingray 8X CD-ROM. */
1719         { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1720         /*
1721          * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1722          * mode sense page capabilities size, but older drives break.
1723          */
1724         { "ATAPI CD ROM DRIVE 50X MAX", NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1725         { "WPI CDS-32X",                NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1726         /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1727         { "",                        "241N", IDE_AFLAG_LE_SPEED_FIELDS       },
1728         /*
1729          * Some drives used by Apple don't advertise audio play
1730          * but they do support reading TOC & audio datas.
1731          */
1732         { "MATSHITADVD-ROM SR-8187", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1733         { "MATSHITADVD-ROM SR-8186", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1734         { "MATSHITADVD-ROM SR-8176", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1735         { "MATSHITADVD-ROM SR-8174", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1736         { "Optiarc DVD RW AD-5200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1737         { "Optiarc DVD RW AD-7200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1738         { "Optiarc DVD RW AD-7543A", NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1739         { "TEAC CD-ROM CD-224E",     NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1740         { NULL, NULL, 0 }
1741 };
1742
1743 static unsigned int ide_cd_flags(u16 *id)
1744 {
1745         const struct cd_list_entry *cle = ide_cd_quirks_list;
1746
1747         while (cle->id_model) {
1748                 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1749                     (cle->id_firmware == NULL ||
1750                      strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1751                         return cle->cd_flags;
1752                 cle++;
1753         }
1754
1755         return 0;
1756 }
1757
1758 static int ide_cdrom_setup(ide_drive_t *drive)
1759 {
1760         struct cdrom_info *cd = drive->driver_data;
1761         struct cdrom_device_info *cdi = &cd->devinfo;
1762         u16 *id = drive->id;
1763         char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1764         int nslots;
1765
1766         ide_debug_log(IDE_DBG_PROBE, "enter");
1767
1768         blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
1769         blk_queue_dma_alignment(drive->queue, 31);
1770         blk_queue_update_dma_pad(drive->queue, 15);
1771         drive->queue->unplug_delay = (1 * HZ) / 1000;
1772         if (!drive->queue->unplug_delay)
1773                 drive->queue->unplug_delay = 1;
1774
1775         drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1776         drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1777
1778         if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1779             fw_rev[4] == '1' && fw_rev[6] <= '2')
1780                 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1781                                      IDE_AFLAG_TOCADDR_AS_BCD);
1782         else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1783                  fw_rev[4] == '1' && fw_rev[6] <= '2')
1784                 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1785         else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1786                 /* 3 => use CD in slot 0 */
1787                 cdi->sanyo_slot = 3;
1788
1789         nslots = ide_cdrom_probe_capabilities(drive);
1790
1791         /* set correct block size */
1792         blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
1793
1794         if (ide_cdrom_register(drive, nslots)) {
1795                 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1796                                 " cdrom driver.\n", drive->name, __func__);
1797                 cd->devinfo.handle = NULL;
1798                 return 1;
1799         }
1800
1801         ide_proc_register_driver(drive, cd->driver);
1802         return 0;
1803 }
1804
1805 static void ide_cd_remove(ide_drive_t *drive)
1806 {
1807         struct cdrom_info *info = drive->driver_data;
1808
1809         ide_debug_log(IDE_DBG_FUNC, "enter");
1810
1811         ide_proc_unregister_driver(drive, info->driver);
1812         device_del(&info->dev);
1813         del_gendisk(info->disk);
1814
1815         mutex_lock(&idecd_ref_mutex);
1816         put_device(&info->dev);
1817         mutex_unlock(&idecd_ref_mutex);
1818 }
1819
1820 static void ide_cd_release(struct device *dev)
1821 {
1822         struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
1823         struct cdrom_device_info *devinfo = &info->devinfo;
1824         ide_drive_t *drive = info->drive;
1825         struct gendisk *g = info->disk;
1826
1827         ide_debug_log(IDE_DBG_FUNC, "enter");
1828
1829         kfree(info->toc);
1830         if (devinfo->handle == drive)
1831                 unregister_cdrom(devinfo);
1832         drive->driver_data = NULL;
1833         blk_queue_prep_rq(drive->queue, NULL);
1834         g->private_data = NULL;
1835         put_disk(g);
1836         kfree(info);
1837 }
1838
1839 static int ide_cd_probe(ide_drive_t *);
1840
1841 static struct ide_driver ide_cdrom_driver = {
1842         .gen_driver = {
1843                 .owner          = THIS_MODULE,
1844                 .name           = "ide-cdrom",
1845                 .bus            = &ide_bus_type,
1846         },
1847         .probe                  = ide_cd_probe,
1848         .remove                 = ide_cd_remove,
1849         .version                = IDECD_VERSION,
1850         .do_request             = ide_cd_do_request,
1851 #ifdef CONFIG_IDE_PROC_FS
1852         .proc_entries           = ide_cd_proc_entries,
1853         .proc_devsets           = ide_cd_proc_devsets,
1854 #endif
1855 };
1856
1857 static int idecd_open(struct block_device *bdev, fmode_t mode)
1858 {
1859         struct cdrom_info *info = ide_cd_get(bdev->bd_disk);
1860         int rc = -ENOMEM;
1861
1862         if (!info)
1863                 return -ENXIO;
1864
1865         rc = cdrom_open(&info->devinfo, bdev, mode);
1866
1867         if (rc < 0)
1868                 ide_cd_put(info);
1869
1870         return rc;
1871 }
1872
1873 static int idecd_release(struct gendisk *disk, fmode_t mode)
1874 {
1875         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1876
1877         cdrom_release(&info->devinfo, mode);
1878
1879         ide_cd_put(info);
1880
1881         return 0;
1882 }
1883
1884 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1885 {
1886         struct packet_command cgc;
1887         char buffer[16];
1888         int stat;
1889         char spindown;
1890
1891         if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1892                 return -EFAULT;
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         buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1901         return cdrom_mode_select(cdi, &cgc);
1902 }
1903
1904 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1905 {
1906         struct packet_command cgc;
1907         char buffer[16];
1908         int stat;
1909         char spindown;
1910
1911         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1912
1913         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1914         if (stat)
1915                 return stat;
1916
1917         spindown = buffer[11] & 0x0f;
1918         if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1919                 return -EFAULT;
1920         return 0;
1921 }
1922
1923 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1924                         unsigned int cmd, unsigned long arg)
1925 {
1926         struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1927         int err;
1928
1929         switch (cmd) {
1930         case CDROMSETSPINDOWN:
1931                 return idecd_set_spindown(&info->devinfo, arg);
1932         case CDROMGETSPINDOWN:
1933                 return idecd_get_spindown(&info->devinfo, arg);
1934         default:
1935                 break;
1936         }
1937
1938         err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1939         if (err == -EINVAL)
1940                 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
1941
1942         return err;
1943 }
1944
1945 static int idecd_media_changed(struct gendisk *disk)
1946 {
1947         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1948         return cdrom_media_changed(&info->devinfo);
1949 }
1950
1951 static int idecd_revalidate_disk(struct gendisk *disk)
1952 {
1953         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1954         struct request_sense sense;
1955
1956         ide_cd_read_toc(info->drive, &sense);
1957
1958         return  0;
1959 }
1960
1961 static struct block_device_operations idecd_ops = {
1962         .owner                  = THIS_MODULE,
1963         .open                   = idecd_open,
1964         .release                = idecd_release,
1965         .locked_ioctl           = idecd_ioctl,
1966         .media_changed          = idecd_media_changed,
1967         .revalidate_disk        = idecd_revalidate_disk
1968 };
1969
1970 /* module options */
1971 static char *ignore;
1972 module_param(ignore, charp, 0400);
1973
1974 static unsigned long debug_mask;
1975 module_param(debug_mask, ulong, 0644);
1976
1977 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1978
1979 static int ide_cd_probe(ide_drive_t *drive)
1980 {
1981         struct cdrom_info *info;
1982         struct gendisk *g;
1983         struct request_sense sense;
1984
1985         ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x",
1986                                      drive->driver_req, drive->media);
1987
1988         if (!strstr("ide-cdrom", drive->driver_req))
1989                 goto failed;
1990
1991         if (drive->media != ide_cdrom && drive->media != ide_optical)
1992                 goto failed;
1993
1994         /* skip drives that we were told to ignore */
1995         if (ignore != NULL) {
1996                 if (strstr(ignore, drive->name)) {
1997                         printk(KERN_INFO PFX "ignoring drive %s\n",
1998                                          drive->name);
1999                         goto failed;
2000                 }
2001         }
2002
2003         drive->debug_mask = debug_mask;
2004         drive->irq_handler = cdrom_newpc_intr;
2005
2006         info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
2007         if (info == NULL) {
2008                 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
2009                                 drive->name);
2010                 goto failed;
2011         }
2012
2013         g = alloc_disk(1 << PARTN_BITS);
2014         if (!g)
2015                 goto out_free_cd;
2016
2017         ide_init_disk(g, drive);
2018
2019         info->dev.parent = &drive->gendev;
2020         info->dev.release = ide_cd_release;
2021         dev_set_name(&info->dev, dev_name(&drive->gendev));
2022
2023         if (device_register(&info->dev))
2024                 goto out_free_disk;
2025
2026         info->drive = drive;
2027         info->driver = &ide_cdrom_driver;
2028         info->disk = g;
2029
2030         g->private_data = &info->driver;
2031
2032         drive->driver_data = info;
2033
2034         g->minors = 1;
2035         g->driverfs_dev = &drive->gendev;
2036         g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
2037         if (ide_cdrom_setup(drive)) {
2038                 put_device(&info->dev);
2039                 goto failed;
2040         }
2041
2042         ide_cd_read_toc(drive, &sense);
2043         g->fops = &idecd_ops;
2044         g->flags |= GENHD_FL_REMOVABLE;
2045         add_disk(g);
2046         return 0;
2047
2048 out_free_disk:
2049         put_disk(g);
2050 out_free_cd:
2051         kfree(info);
2052 failed:
2053         return -ENODEV;
2054 }
2055
2056 static void __exit ide_cdrom_exit(void)
2057 {
2058         driver_unregister(&ide_cdrom_driver.gen_driver);
2059 }
2060
2061 static int __init ide_cdrom_init(void)
2062 {
2063         printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
2064         return driver_register(&ide_cdrom_driver.gen_driver);
2065 }
2066
2067 MODULE_ALIAS("ide:*m-cdrom*");
2068 MODULE_ALIAS("ide-cd");
2069 module_init(ide_cdrom_init);
2070 module_exit(ide_cdrom_exit);
2071 MODULE_LICENSE("GPL");