SAFE public projects git trees. - safe/jmp/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         ide_set_handler(drive, cdrom_newpc_intr, timeout, expiry);
 963         return ide_started;
 964
 965 end_request:
 966         if (blk_pc_request(rq)) {
 967                 unsigned int dlen = rq->data_len;
 968
 969                 if (dma)
 970                         rq->data_len = 0;
 971
 972                 if (blk_end_request(rq, 0, dlen))
 973                         BUG();
 974
 975                 hwif->rq = NULL;
 976         } else {
 977                 if (!uptodate)
 978                         rq->cmd_flags |= REQ_FAILED;
 979                 cdrom_end_request(drive, uptodate);
 980         }
 981         return ide_stopped;
 982 }
 983
 984 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
 985 {
 986         struct cdrom_info *cd = drive->driver_data;
 987         int write = rq_data_dir(rq) == WRITE;
 988         unsigned short sectors_per_frame =
 989                 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
 990
 991         ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, write: 0x%x, "
 992                                   "secs_per_frame: %u",
 993                                   rq->cmd[0], write, sectors_per_frame);
 994
 995         if (write) {
 996                 /* disk has become write protected */
 997                 if (get_disk_ro(cd->disk)) {
 998                         cdrom_end_request(drive, 0);
 999                         return ide_stopped;
1000                 }
1001         } else {
1002                 /*
1003                  * We may be retrying this request after an error.  Fix up any
1004                  * weirdness which might be present in the request packet.
1005                  */
1006                 ide_cd_restore_request(drive, rq);
1007         }
1008
1009         /* use DMA, if possible / writes *must* be hardware frame aligned */
1010         if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
1011             (rq->sector & (sectors_per_frame - 1))) {
1012                 if (write) {
1013                         cdrom_end_request(drive, 0);
1014                         return ide_stopped;
1015                 }
1016                 drive->dma = 0;
1017         } else
1018                 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1019
1020         if (write)
1021                 cd->devinfo.media_written = 1;
1022
1023         return ide_started;
1024 }
1025
1026 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
1027 {
1028
1029         ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
1030                                   rq->cmd[0], rq->cmd_type);
1031
1032         if (blk_pc_request(rq))
1033                 rq->cmd_flags |= REQ_QUIET;
1034         else
1035                 rq->cmd_flags &= ~REQ_FAILED;
1036
1037         drive->dma = 0;
1038
1039         /* sg request */
1040         if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) {
1041                 struct request_queue *q = drive->queue;
1042                 unsigned int alignment;
1043                 char *buf;
1044
1045                 if (rq->bio)
1046                         buf = bio_data(rq->bio);
1047                 else
1048                         buf = rq->data;
1049
1050                 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1051
1052                 /*
1053                  * check if dma is safe
1054                  *
1055                  * NOTE! The "len" and "addr" checks should possibly have
1056                  * separate masks.
1057                  */
1058                 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
1059                 if ((unsigned long)buf & alignment
1060                     || rq->data_len & q->dma_pad_mask
1061                     || object_is_on_stack(buf))
1062                         drive->dma = 0;
1063         }
1064 }
1065
1066 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
1067                                         sector_t block)
1068 {
1069         struct ide_cmd cmd;
1070
1071         ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
1072                                   rq->cmd[0], (unsigned long long)block);
1073
1074         if (drive->debug_mask & IDE_DBG_RQ)
1075                 blk_dump_rq_flags(rq, "ide_cd_do_request");
1076
1077         if (blk_fs_request(rq)) {
1078                 if (cdrom_start_rw(drive, rq) == ide_stopped)
1079                         return ide_stopped;
1080
1081                 if (ide_cd_prepare_rw_request(drive, rq) == ide_stopped)
1082                         return ide_stopped;
1083         } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
1084                    rq->cmd_type == REQ_TYPE_ATA_PC) {
1085                 if (!rq->timeout)
1086                         rq->timeout = ATAPI_WAIT_PC;
1087
1088                 cdrom_do_block_pc(drive, rq);
1089         } else if (blk_special_request(rq)) {
1090                 /* right now this can only be a reset... */
1091                 cdrom_end_request(drive, 1);
1092                 return ide_stopped;
1093         } else {
1094                 blk_dump_rq_flags(rq, DRV_NAME " bad flags");
1095                 cdrom_end_request(drive, 0);
1096                 return ide_stopped;
1097         }
1098
1099         memset(&cmd, 0, sizeof(cmd));
1100
1101         if (rq_data_dir(rq))
1102                 cmd.tf_flags |= IDE_TFLAG_WRITE;
1103
1104         cmd.rq = rq;
1105
1106         return ide_issue_pc(drive, &cmd);
1107 }
1108
1109 /*
1110  * Ioctl handling.
1111  *
1112  * Routines which queue packet commands take as a final argument a pointer to a
1113  * request_sense struct. If execution of the command results in an error with a
1114  * CHECK CONDITION status, this structure will be filled with the results of the
1115  * subsequent request sense command. The pointer can also be NULL, in which case
1116  * no sense information is returned.
1117  */
1118 static void msf_from_bcd(struct atapi_msf *msf)
1119 {
1120         msf->minute = bcd2bin(msf->minute);
1121         msf->second = bcd2bin(msf->second);
1122         msf->frame  = bcd2bin(msf->frame);
1123 }
1124
1125 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
1126 {
1127         struct cdrom_info *info = drive->driver_data;
1128         struct cdrom_device_info *cdi = &info->devinfo;
1129         unsigned char cmd[BLK_MAX_CDB];
1130
1131         ide_debug_log(IDE_DBG_FUNC, "enter");
1132
1133         memset(cmd, 0, BLK_MAX_CDB);
1134         cmd[0] = GPCMD_TEST_UNIT_READY;
1135
1136         /*
1137          * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
1138          * instead of supporting the LOAD_UNLOAD opcode.
1139          */
1140         cmd[7] = cdi->sanyo_slot % 3;
1141
1142         return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
1143 }
1144
1145 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
1146                                unsigned long *sectors_per_frame,
1147                                struct request_sense *sense)
1148 {
1149         struct {
1150                 __be32 lba;
1151                 __be32 blocklen;
1152         } capbuf;
1153
1154         int stat;
1155         unsigned char cmd[BLK_MAX_CDB];
1156         unsigned len = sizeof(capbuf);
1157         u32 blocklen;
1158
1159         ide_debug_log(IDE_DBG_FUNC, "enter");
1160
1161         memset(cmd, 0, BLK_MAX_CDB);
1162         cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1163
1164         stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
1165                                REQ_QUIET);
1166         if (stat)
1167                 return stat;
1168
1169         /*
1170          * Sanity check the given block size
1171          */
1172         blocklen = be32_to_cpu(capbuf.blocklen);
1173         switch (blocklen) {
1174         case 512:
1175         case 1024:
1176         case 2048:
1177         case 4096:
1178                 break;
1179         default:
1180                 printk(KERN_ERR PFX "%s: weird block size %u\n",
1181                                 drive->name, blocklen);
1182                 printk(KERN_ERR PFX "%s: default to 2kb block size\n",
1183                                 drive->name);
1184                 blocklen = 2048;
1185                 break;
1186         }
1187
1188         *capacity = 1 + be32_to_cpu(capbuf.lba);
1189         *sectors_per_frame = blocklen >> SECTOR_BITS;
1190
1191         ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu",
1192                                      *capacity, *sectors_per_frame);
1193
1194         return 0;
1195 }
1196
1197 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1198                                 int format, char *buf, int buflen,
1199                                 struct request_sense *sense)
1200 {
1201         unsigned char cmd[BLK_MAX_CDB];
1202
1203         ide_debug_log(IDE_DBG_FUNC, "enter");
1204
1205         memset(cmd, 0, BLK_MAX_CDB);
1206
1207         cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1208         cmd[6] = trackno;
1209         cmd[7] = (buflen >> 8);
1210         cmd[8] = (buflen & 0xff);
1211         cmd[9] = (format << 6);
1212
1213         if (msf_flag)
1214                 cmd[1] = 2;
1215
1216         return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
1217 }
1218
1219 /* Try to read the entire TOC for the disk into our internal buffer. */
1220 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1221 {
1222         int stat, ntracks, i;
1223         struct cdrom_info *info = drive->driver_data;
1224         struct cdrom_device_info *cdi = &info->devinfo;
1225         struct atapi_toc *toc = info->toc;
1226         struct {
1227                 struct atapi_toc_header hdr;
1228                 struct atapi_toc_entry  ent;
1229         } ms_tmp;
1230         long last_written;
1231         unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1232
1233         ide_debug_log(IDE_DBG_FUNC, "enter");
1234
1235         if (toc == NULL) {
1236                 /* try to allocate space */
1237                 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1238                 if (toc == NULL) {
1239                         printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
1240                                         drive->name);
1241                         return -ENOMEM;
1242                 }
1243                 info->toc = toc;
1244         }
1245
1246         /*
1247          * Check to see if the existing data is still valid. If it is,
1248          * just return.
1249          */
1250         (void) cdrom_check_status(drive, sense);
1251
1252         if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
1253                 return 0;
1254
1255         /* try to get the total cdrom capacity and sector size */
1256         stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1257                                    sense);
1258         if (stat)
1259                 toc->capacity = 0x1fffff;
1260
1261         set_capacity(info->disk, toc->capacity * sectors_per_frame);
1262         /* save a private copy of the TOC capacity for error handling */
1263         drive->probed_capacity = toc->capacity * sectors_per_frame;
1264
1265         blk_queue_hardsect_size(drive->queue,
1266                                 sectors_per_frame << SECTOR_BITS);
1267
1268         /* first read just the header, so we know how long the TOC is */
1269         stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1270                                     sizeof(struct atapi_toc_header), sense);
1271         if (stat)
1272                 return stat;
1273
1274         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1275                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1276                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1277         }
1278
1279         ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1280         if (ntracks <= 0)
1281                 return -EIO;
1282         if (ntracks > MAX_TRACKS)
1283                 ntracks = MAX_TRACKS;
1284
1285         /* now read the whole schmeer */
1286         stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1287                                   (char *)&toc->hdr,
1288                                    sizeof(struct atapi_toc_header) +
1289                                    (ntracks + 1) *
1290                                    sizeof(struct atapi_toc_entry), sense);
1291
1292         if (stat && toc->hdr.first_track > 1) {
1293                 /*
1294                  * Cds with CDI tracks only don't have any TOC entries, despite
1295                  * of this the returned values are
1296                  * first_track == last_track = number of CDI tracks + 1,
1297                  * so that this case is indistinguishable from the same layout
1298                  * plus an additional audio track. If we get an error for the
1299                  * regular case, we assume a CDI without additional audio
1300                  * tracks. In this case the readable TOC is empty (CDI tracks
1301                  * are not included) and only holds the Leadout entry.
1302                  *
1303                  * Heiko Eißfeldt.
1304                  */
1305                 ntracks = 0;
1306                 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1307                                            (char *)&toc->hdr,
1308                                            sizeof(struct atapi_toc_header) +
1309                                            (ntracks + 1) *
1310                                            sizeof(struct atapi_toc_entry),
1311                                            sense);
1312                 if (stat)
1313                         return stat;
1314
1315                 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1316                         toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1317                         toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1318                 } else {
1319                         toc->hdr.first_track = CDROM_LEADOUT;
1320                         toc->hdr.last_track = CDROM_LEADOUT;
1321                 }
1322         }
1323
1324         if (stat)
1325                 return stat;
1326
1327         toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1328
1329         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1330                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1331                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1332         }
1333
1334         for (i = 0; i <= ntracks; i++) {
1335                 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1336                         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1337                                 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1338                         msf_from_bcd(&toc->ent[i].addr.msf);
1339                 }
1340                 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1341                                                   toc->ent[i].addr.msf.second,
1342                                                   toc->ent[i].addr.msf.frame);
1343         }
1344
1345         if (toc->hdr.first_track != CDROM_LEADOUT) {
1346                 /* read the multisession information */
1347                 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1348                                            sizeof(ms_tmp), sense);
1349                 if (stat)
1350                         return stat;
1351
1352                 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1353         } else {
1354                 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1355                 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1356                 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1357         }
1358
1359         if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1360                 /* re-read multisession information using MSF format */
1361                 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1362                                            sizeof(ms_tmp), sense);
1363                 if (stat)
1364                         return stat;
1365
1366                 msf_from_bcd(&ms_tmp.ent.addr.msf);
1367                 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1368                                                    ms_tmp.ent.addr.msf.second,
1369                                                    ms_tmp.ent.addr.msf.frame);
1370         }
1371
1372         toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1373
1374         /* now try to get the total cdrom capacity */
1375         stat = cdrom_get_last_written(cdi, &last_written);
1376         if (!stat && (last_written > toc->capacity)) {
1377                 toc->capacity = last_written;
1378                 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1379                 drive->probed_capacity = toc->capacity * sectors_per_frame;
1380         }
1381
1382         /* Remember that we've read this stuff. */
1383         drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1384
1385         return 0;
1386 }
1387
1388 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1389 {
1390         struct cdrom_info *info = drive->driver_data;
1391         struct cdrom_device_info *cdi = &info->devinfo;
1392         struct packet_command cgc;
1393         int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1394
1395         ide_debug_log(IDE_DBG_FUNC, "enter");
1396
1397         if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1398                 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1399
1400         init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1401         do {
1402                 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1403                 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1404                 if (!stat)
1405                         break;
1406         } while (--attempts);
1407         return stat;
1408 }
1409
1410 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1411 {
1412         struct cdrom_info *cd = drive->driver_data;
1413         u16 curspeed, maxspeed;
1414
1415         ide_debug_log(IDE_DBG_FUNC, "enter");
1416
1417         if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1418                 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1419                 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1420         } else {
1421                 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1422                 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1423         }
1424
1425         ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u",
1426                                      curspeed, maxspeed);
1427
1428         cd->current_speed = (curspeed + (176/2)) / 176;
1429         cd->max_speed = (maxspeed + (176/2)) / 176;
1430 }
1431
1432 #define IDE_CD_CAPABILITIES \
1433         (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1434          CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1435          CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1436          CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1437          CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1438
1439 static struct cdrom_device_ops ide_cdrom_dops = {
1440         .open                   = ide_cdrom_open_real,
1441         .release                = ide_cdrom_release_real,
1442         .drive_status           = ide_cdrom_drive_status,
1443         .media_changed          = ide_cdrom_check_media_change_real,
1444         .tray_move              = ide_cdrom_tray_move,
1445         .lock_door              = ide_cdrom_lock_door,
1446         .select_speed           = ide_cdrom_select_speed,
1447         .get_last_session       = ide_cdrom_get_last_session,
1448         .get_mcn                = ide_cdrom_get_mcn,
1449         .reset                  = ide_cdrom_reset,
1450         .audio_ioctl            = ide_cdrom_audio_ioctl,
1451         .capability             = IDE_CD_CAPABILITIES,
1452         .generic_packet         = ide_cdrom_packet,
1453 };
1454
1455 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1456 {
1457         struct cdrom_info *info = drive->driver_data;
1458         struct cdrom_device_info *devinfo = &info->devinfo;
1459
1460         ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots);
1461
1462         devinfo->ops = &ide_cdrom_dops;
1463         devinfo->speed = info->current_speed;
1464         devinfo->capacity = nslots;
1465         devinfo->handle = drive;
1466         strcpy(devinfo->name, drive->name);
1467
1468         if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1469                 devinfo->mask |= CDC_SELECT_SPEED;
1470
1471         devinfo->disk = info->disk;
1472         return register_cdrom(devinfo);
1473 }
1474
1475 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1476 {
1477         struct cdrom_info *cd = drive->driver_data;
1478         struct cdrom_device_info *cdi = &cd->devinfo;
1479         u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1480         mechtype_t mechtype;
1481         int nslots = 1;
1482
1483         ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx",
1484                                      drive->media, drive->atapi_flags);
1485
1486         cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1487                      CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1488                      CDC_MO_DRIVE | CDC_RAM);
1489
1490         if (drive->media == ide_optical) {
1491                 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1492                 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1493                                 drive->name);
1494                 return nslots;
1495         }
1496
1497         if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1498                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1499                 cdi->mask &= ~CDC_PLAY_AUDIO;
1500                 return nslots;
1501         }
1502
1503         /*
1504          * We have to cheat a little here. the packet will eventually be queued
1505          * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1506          * Since this device hasn't been registered with the Uniform layer yet,
1507          * it can't do this. Same goes for cdi->ops.
1508          */
1509         cdi->handle = drive;
1510         cdi->ops = &ide_cdrom_dops;
1511
1512         if (ide_cdrom_get_capabilities(drive, buf))
1513                 return 0;
1514
1515         if ((buf[8 + 6] & 0x01) == 0)
1516                 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1517         if (buf[8 + 6] & 0x08)
1518                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1519         if (buf[8 + 3] & 0x01)
1520                 cdi->mask &= ~CDC_CD_R;
1521         if (buf[8 + 3] & 0x02)
1522                 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1523         if (buf[8 + 2] & 0x38)
1524                 cdi->mask &= ~CDC_DVD;
1525         if (buf[8 + 3] & 0x20)
1526                 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1527         if (buf[8 + 3] & 0x10)
1528                 cdi->mask &= ~CDC_DVD_R;
1529         if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1530                 cdi->mask &= ~CDC_PLAY_AUDIO;
1531
1532         mechtype = buf[8 + 6] >> 5;
1533         if (mechtype == mechtype_caddy ||
1534             mechtype == mechtype_popup ||
1535             (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1536                 cdi->mask |= CDC_CLOSE_TRAY;
1537
1538         if (cdi->sanyo_slot > 0) {
1539                 cdi->mask &= ~CDC_SELECT_DISC;
1540                 nslots = 3;
1541         } else if (mechtype == mechtype_individual_changer ||
1542                    mechtype == mechtype_cartridge_changer) {
1543                 nslots = cdrom_number_of_slots(cdi);
1544                 if (nslots > 1)
1545                         cdi->mask &= ~CDC_SELECT_DISC;
1546         }
1547
1548         ide_cdrom_update_speed(drive, buf);
1549
1550         printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1551
1552         /* don't print speed if the drive reported 0 */
1553         if (cd->max_speed)
1554                 printk(KERN_CONT " %dX", cd->max_speed);
1555
1556         printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1557
1558         if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1559                 printk(KERN_CONT " DVD%s%s",
1560                                  (cdi->mask & CDC_DVD_R) ? "" : "-R",
1561                                  (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1562
1563         if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1564                 printk(KERN_CONT " CD%s%s",
1565                                  (cdi->mask & CDC_CD_R) ? "" : "-R",
1566                                  (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1567
1568         if ((cdi->mask & CDC_SELECT_DISC) == 0)
1569                 printk(KERN_CONT " changer w/%d slots", nslots);
1570         else
1571                 printk(KERN_CONT " drive");
1572
1573         printk(KERN_CONT ", %dkB Cache\n",
1574                          be16_to_cpup((__be16 *)&buf[8 + 12]));
1575
1576         return nslots;
1577 }
1578
1579 /* standard prep_rq_fn that builds 10 byte cmds */
1580 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1581 {
1582         int hard_sect = queue_hardsect_size(q);
1583         long block = (long)rq->hard_sector / (hard_sect >> 9);
1584         unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1585
1586         memset(rq->cmd, 0, BLK_MAX_CDB);
1587
1588         if (rq_data_dir(rq) == READ)
1589                 rq->cmd[0] = GPCMD_READ_10;
1590         else
1591                 rq->cmd[0] = GPCMD_WRITE_10;
1592
1593         /*
1594          * fill in lba
1595          */
1596         rq->cmd[2] = (block >> 24) & 0xff;
1597         rq->cmd[3] = (block >> 16) & 0xff;
1598         rq->cmd[4] = (block >>  8) & 0xff;
1599         rq->cmd[5] = block & 0xff;
1600
1601         /*
1602          * and transfer length
1603          */
1604         rq->cmd[7] = (blocks >> 8) & 0xff;
1605         rq->cmd[8] = blocks & 0xff;
1606         rq->cmd_len = 10;
1607         return BLKPREP_OK;
1608 }
1609
1610 /*
1611  * Most of the SCSI commands are supported directly by ATAPI devices.
1612  * This transform handles the few exceptions.
1613  */
1614 static int ide_cdrom_prep_pc(struct request *rq)
1615 {
1616         u8 *c = rq->cmd;
1617
1618         /* transform 6-byte read/write commands to the 10-byte version */
1619         if (c[0] == READ_6 || c[0] == WRITE_6) {
1620                 c[8] = c[4];
1621                 c[5] = c[3];
1622                 c[4] = c[2];
1623                 c[3] = c[1] & 0x1f;
1624                 c[2] = 0;
1625                 c[1] &= 0xe0;
1626                 c[0] += (READ_10 - READ_6);
1627                 rq->cmd_len = 10;
1628                 return BLKPREP_OK;
1629         }
1630
1631         /*
1632          * it's silly to pretend we understand 6-byte sense commands, just
1633          * reject with ILLEGAL_REQUEST and the caller should take the
1634          * appropriate action
1635          */
1636         if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1637                 rq->errors = ILLEGAL_REQUEST;
1638                 return BLKPREP_KILL;
1639         }
1640
1641         return BLKPREP_OK;
1642 }
1643
1644 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1645 {
1646         if (blk_fs_request(rq))
1647                 return ide_cdrom_prep_fs(q, rq);
1648         else if (blk_pc_request(rq))
1649                 return ide_cdrom_prep_pc(rq);
1650
1651         return 0;
1652 }
1653
1654 struct cd_list_entry {
1655         const char      *id_model;
1656         const char      *id_firmware;
1657         unsigned int    cd_flags;
1658 };
1659
1660 #ifdef CONFIG_IDE_PROC_FS
1661 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1662 {
1663         unsigned long capacity, sectors_per_frame;
1664
1665         if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1666                 return 0;
1667
1668         return capacity * sectors_per_frame;
1669 }
1670
1671 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1672                                         int count, int *eof, void *data)
1673 {
1674         ide_drive_t *drive = data;
1675         int len;
1676
1677         len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1678         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1679 }
1680
1681 static ide_proc_entry_t idecd_proc[] = {
1682         { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1683         { NULL, 0, NULL, NULL }
1684 };
1685
1686 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1687 {
1688         return idecd_proc;
1689 }
1690
1691 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1692 {
1693         return NULL;
1694 }
1695 #endif
1696
1697 static const struct cd_list_entry ide_cd_quirks_list[] = {
1698         /* Limit transfer size per interrupt. */
1699         { "SAMSUNG CD-ROM SCR-2430", NULL,   IDE_AFLAG_LIMIT_NFRAMES         },
1700         { "SAMSUNG CD-ROM SCR-2432", NULL,   IDE_AFLAG_LIMIT_NFRAMES         },
1701         /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1702         { "SAMSUNG CD-ROM SCR-3231", NULL,   IDE_AFLAG_NO_SPEED_SELECT       },
1703         /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1704         { "NEC CD-ROM DRIVE:260",    "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1705                                              IDE_AFLAG_PRE_ATAPI12,          },
1706         /* Vertos 300, some versions of this drive like to talk BCD. */
1707         { "V003S0DS",                NULL,   IDE_AFLAG_VERTOS_300_SSD,       },
1708         /* Vertos 600 ESD. */
1709         { "V006E0DS",                NULL,   IDE_AFLAG_VERTOS_600_ESD,       },
1710         /*
1711          * Sanyo 3 CD changer uses a non-standard command for CD changing
1712          * (by default standard ATAPI support for CD changers is used).
1713          */
1714         { "CD-ROM CDR-C3 G",         NULL,   IDE_AFLAG_SANYO_3CD             },
1715         { "CD-ROM CDR-C3G",          NULL,   IDE_AFLAG_SANYO_3CD             },
1716         { "CD-ROM CDR_C36",          NULL,   IDE_AFLAG_SANYO_3CD             },
1717         /* Stingray 8X CD-ROM. */
1718         { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1719         /*
1720          * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1721          * mode sense page capabilities size, but older drives break.
1722          */
1723         { "ATAPI CD ROM DRIVE 50X MAX", NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1724         { "WPI CDS-32X",                NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1725         /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1726         { "",                        "241N", IDE_AFLAG_LE_SPEED_FIELDS       },
1727         /*
1728          * Some drives used by Apple don't advertise audio play
1729          * but they do support reading TOC & audio datas.
1730          */
1731         { "MATSHITADVD-ROM SR-8187", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1732         { "MATSHITADVD-ROM SR-8186", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1733         { "MATSHITADVD-ROM SR-8176", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1734         { "MATSHITADVD-ROM SR-8174", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1735         { "Optiarc DVD RW AD-5200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1736         { "Optiarc DVD RW AD-7200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1737         { "Optiarc DVD RW AD-7543A", NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1738         { "TEAC CD-ROM CD-224E",     NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1739         { NULL, NULL, 0 }
1740 };
1741
1742 static unsigned int ide_cd_flags(u16 *id)
1743 {
1744         const struct cd_list_entry *cle = ide_cd_quirks_list;
1745
1746         while (cle->id_model) {
1747                 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1748                     (cle->id_firmware == NULL ||
1749                      strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1750                         return cle->cd_flags;
1751                 cle++;
1752         }
1753
1754         return 0;
1755 }
1756
1757 static int ide_cdrom_setup(ide_drive_t *drive)
1758 {
1759         struct cdrom_info *cd = drive->driver_data;
1760         struct cdrom_device_info *cdi = &cd->devinfo;
1761         u16 *id = drive->id;
1762         char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1763         int nslots;
1764
1765         ide_debug_log(IDE_DBG_PROBE, "enter");
1766
1767         blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
1768         blk_queue_dma_alignment(drive->queue, 31);
1769         blk_queue_update_dma_pad(drive->queue, 15);
1770         drive->queue->unplug_delay = (1 * HZ) / 1000;
1771         if (!drive->queue->unplug_delay)
1772                 drive->queue->unplug_delay = 1;
1773
1774         drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1775         drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1776
1777         if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1778             fw_rev[4] == '1' && fw_rev[6] <= '2')
1779                 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1780                                      IDE_AFLAG_TOCADDR_AS_BCD);
1781         else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1782                  fw_rev[4] == '1' && fw_rev[6] <= '2')
1783                 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1784         else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1785                 /* 3 => use CD in slot 0 */
1786                 cdi->sanyo_slot = 3;
1787
1788         nslots = ide_cdrom_probe_capabilities(drive);
1789
1790         /* set correct block size */
1791         blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
1792
1793         if (ide_cdrom_register(drive, nslots)) {
1794                 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1795                                 " cdrom driver.\n", drive->name, __func__);
1796                 cd->devinfo.handle = NULL;
1797                 return 1;
1798         }
1799
1800         ide_proc_register_driver(drive, cd->driver);
1801         return 0;
1802 }
1803
1804 static void ide_cd_remove(ide_drive_t *drive)
1805 {
1806         struct cdrom_info *info = drive->driver_data;
1807
1808         ide_debug_log(IDE_DBG_FUNC, "enter");
1809
1810         ide_proc_unregister_driver(drive, info->driver);
1811         device_del(&info->dev);
1812         del_gendisk(info->disk);
1813
1814         mutex_lock(&idecd_ref_mutex);
1815         put_device(&info->dev);
1816         mutex_unlock(&idecd_ref_mutex);
1817 }
1818
1819 static void ide_cd_release(struct device *dev)
1820 {
1821         struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
1822         struct cdrom_device_info *devinfo = &info->devinfo;
1823         ide_drive_t *drive = info->drive;
1824         struct gendisk *g = info->disk;
1825
1826         ide_debug_log(IDE_DBG_FUNC, "enter");
1827
1828         kfree(info->toc);
1829         if (devinfo->handle == drive)
1830                 unregister_cdrom(devinfo);
1831         drive->driver_data = NULL;
1832         blk_queue_prep_rq(drive->queue, NULL);
1833         g->private_data = NULL;
1834         put_disk(g);
1835         kfree(info);
1836 }
1837
1838 static int ide_cd_probe(ide_drive_t *);
1839
1840 static struct ide_driver ide_cdrom_driver = {
1841         .gen_driver = {
1842                 .owner          = THIS_MODULE,
1843                 .name           = "ide-cdrom",
1844                 .bus            = &ide_bus_type,
1845         },
1846         .probe                  = ide_cd_probe,
1847         .remove                 = ide_cd_remove,
1848         .version                = IDECD_VERSION,
1849         .do_request             = ide_cd_do_request,
1850 #ifdef CONFIG_IDE_PROC_FS
1851         .proc_entries           = ide_cd_proc_entries,
1852         .proc_devsets           = ide_cd_proc_devsets,
1853 #endif
1854 };
1855
1856 static int idecd_open(struct block_device *bdev, fmode_t mode)
1857 {
1858         struct cdrom_info *info = ide_cd_get(bdev->bd_disk);
1859         int rc = -ENOMEM;
1860
1861         if (!info)
1862                 return -ENXIO;
1863
1864         rc = cdrom_open(&info->devinfo, bdev, mode);
1865
1866         if (rc < 0)
1867                 ide_cd_put(info);
1868
1869         return rc;
1870 }
1871
1872 static int idecd_release(struct gendisk *disk, fmode_t mode)
1873 {
1874         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1875
1876         cdrom_release(&info->devinfo, mode);
1877
1878         ide_cd_put(info);
1879
1880         return 0;
1881 }
1882
1883 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1884 {
1885         struct packet_command cgc;
1886         char buffer[16];
1887         int stat;
1888         char spindown;
1889
1890         if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1891                 return -EFAULT;
1892
1893         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1894
1895         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1896         if (stat)
1897                 return stat;
1898
1899         buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1900         return cdrom_mode_select(cdi, &cgc);
1901 }
1902
1903 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1904 {
1905         struct packet_command cgc;
1906         char buffer[16];
1907         int stat;
1908         char spindown;
1909
1910         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1911
1912         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1913         if (stat)
1914                 return stat;
1915
1916         spindown = buffer[11] & 0x0f;
1917         if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1918                 return -EFAULT;
1919         return 0;
1920 }
1921
1922 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1923                         unsigned int cmd, unsigned long arg)
1924 {
1925         struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1926         int err;
1927
1928         switch (cmd) {
1929         case CDROMSETSPINDOWN:
1930                 return idecd_set_spindown(&info->devinfo, arg);
1931         case CDROMGETSPINDOWN:
1932                 return idecd_get_spindown(&info->devinfo, arg);
1933         default:
1934                 break;
1935         }
1936
1937         err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1938         if (err == -EINVAL)
1939                 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
1940
1941         return err;
1942 }
1943
1944 static int idecd_media_changed(struct gendisk *disk)
1945 {
1946         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1947         return cdrom_media_changed(&info->devinfo);
1948 }
1949
1950 static int idecd_revalidate_disk(struct gendisk *disk)
1951 {
1952         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1953         struct request_sense sense;
1954
1955         ide_cd_read_toc(info->drive, &sense);
1956
1957         return  0;
1958 }
1959
1960 static struct block_device_operations idecd_ops = {
1961         .owner                  = THIS_MODULE,
1962         .open                   = idecd_open,
1963         .release                = idecd_release,
1964         .locked_ioctl           = idecd_ioctl,
1965         .media_changed          = idecd_media_changed,
1966         .revalidate_disk        = idecd_revalidate_disk
1967 };
1968
1969 /* module options */
1970 static char *ignore;
1971 module_param(ignore, charp, 0400);
1972
1973 static unsigned long debug_mask;
1974 module_param(debug_mask, ulong, 0644);
1975
1976 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1977
1978 static int ide_cd_probe(ide_drive_t *drive)
1979 {
1980         struct cdrom_info *info;
1981         struct gendisk *g;
1982         struct request_sense sense;
1983
1984         ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x",
1985                                      drive->driver_req, drive->media);
1986
1987         if (!strstr("ide-cdrom", drive->driver_req))
1988                 goto failed;
1989
1990         if (drive->media != ide_cdrom && drive->media != ide_optical)
1991                 goto failed;
1992
1993         /* skip drives that we were told to ignore */
1994         if (ignore != NULL) {
1995                 if (strstr(ignore, drive->name)) {
1996                         printk(KERN_INFO PFX "ignoring drive %s\n",
1997                                          drive->name);
1998                         goto failed;
1999                 }
2000         }
2001
2002         drive->debug_mask = debug_mask;
2003         drive->irq_handler = cdrom_newpc_intr;
2004
2005         info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
2006         if (info == NULL) {
2007                 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
2008                                 drive->name);
2009                 goto failed;
2010         }
2011
2012         g = alloc_disk(1 << PARTN_BITS);
2013         if (!g)
2014                 goto out_free_cd;
2015
2016         ide_init_disk(g, drive);
2017
2018         info->dev.parent = &drive->gendev;
2019         info->dev.release = ide_cd_release;
2020         dev_set_name(&info->dev, dev_name(&drive->gendev));
2021
2022         if (device_register(&info->dev))
2023                 goto out_free_disk;
2024
2025         info->drive = drive;
2026         info->driver = &ide_cdrom_driver;
2027         info->disk = g;
2028
2029         g->private_data = &info->driver;
2030
2031         drive->driver_data = info;
2032
2033         g->minors = 1;
2034         g->driverfs_dev = &drive->gendev;
2035         g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
2036         if (ide_cdrom_setup(drive)) {
2037                 put_device(&info->dev);
2038                 goto failed;
2039         }
2040
2041         ide_cd_read_toc(drive, &sense);
2042         g->fops = &idecd_ops;
2043         g->flags |= GENHD_FL_REMOVABLE;
2044         add_disk(g);
2045         return 0;
2046
2047 out_free_disk:
2048         put_disk(g);
2049 out_free_cd:
2050         kfree(info);
2051 failed:
2052         return -ENODEV;
2053 }
2054
2055 static void __exit ide_cdrom_exit(void)
2056 {
2057         driver_unregister(&ide_cdrom_driver.gen_driver);
2058 }
2059
2060 static int __init ide_cdrom_init(void)
2061 {
2062         printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
2063         return driver_register(&ide_cdrom_driver.gen_driver);
2064 }
2065
2066 MODULE_ALIAS("ide:*m-cdrom*");
2067 MODULE_ALIAS("ide-cd");
2068 module_init(ide_cdrom_init);
2069 module_exit(ide_cdrom_exit);
2070 MODULE_LICENSE("GPL");