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   1 /*
   2  * ATAPI CD-ROM driver.
   3  *
   4  * Copyright (C) 1994-1996   Scott Snyder <snyder@fnald0.fnal.gov>
   5  * Copyright (C) 1996-1998   Erik Andersen <andersee@debian.org>
   6  * Copyright (C) 1998-2000   Jens Axboe <axboe@suse.de>
   7  * Copyright (C) 2005, 2007  Bartlomiej Zolnierkiewicz
   8  *
   9  * May be copied or modified under the terms of the GNU General Public
  10  * License.  See linux/COPYING for more information.
  11  *
  12  * See Documentation/cdrom/ide-cd for usage information.
  13  *
  14  * Suggestions are welcome. Patches that work are more welcome though. ;-)
  15  * 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 IDECD_VERSION "5.00"
  27
  28 #include <linux/module.h>
  29 #include <linux/types.h>
  30 #include <linux/kernel.h>
  31 #include <linux/delay.h>
  32 #include <linux/timer.h>
  33 #include <linux/slab.h>
  34 #include <linux/interrupt.h>
  35 #include <linux/errno.h>
  36 #include <linux/cdrom.h>
  37 #include <linux/ide.h>
  38 #include <linux/completion.h>
  39 #include <linux/mutex.h>
  40 #include <linux/bcd.h>
  41
  42 /* For SCSI -> ATAPI command conversion */
  43 #include <scsi/scsi.h>
  44
  45 #include <linux/irq.h>
  46 #include <linux/io.h>
  47 #include <asm/byteorder.h>
  48 #include <linux/uaccess.h>
  49 #include <asm/unaligned.h>
  50
  51 #include "ide-cd.h"
  52
  53 static DEFINE_MUTEX(idecd_ref_mutex);
  54
  55 #define to_ide_cd(obj) container_of(obj, struct cdrom_info, kref)
  56
  57 #define ide_cd_g(disk) \
  58         container_of((disk)->private_data, struct cdrom_info, driver)
  59
  60 static void ide_cd_release(struct kref *);
  61
  62 static struct cdrom_info *ide_cd_get(struct gendisk *disk)
  63 {
  64         struct cdrom_info *cd = NULL;
  65
  66         mutex_lock(&idecd_ref_mutex);
  67         cd = ide_cd_g(disk);
  68         if (cd) {
  69                 if (ide_device_get(cd->drive))
  70                         cd = NULL;
  71                 else
  72                         kref_get(&cd->kref);
  73
  74         }
  75         mutex_unlock(&idecd_ref_mutex);
  76         return cd;
  77 }
  78
  79 static void ide_cd_put(struct cdrom_info *cd)
  80 {
  81         ide_drive_t *drive = cd->drive;
  82
  83         mutex_lock(&idecd_ref_mutex);
  84         kref_put(&cd->kref, ide_cd_release);
  85         ide_device_put(drive);
  86         mutex_unlock(&idecd_ref_mutex);
  87 }
  88
  89 /*
  90  * Generic packet command support and error handling routines.
  91  */
  92
  93 /* Mark that we've seen a media change and invalidate our internal buffers. */
  94 static void cdrom_saw_media_change(ide_drive_t *drive)
  95 {
  96         drive->atapi_flags |= IDE_AFLAG_MEDIA_CHANGED;
  97         drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
  98 }
  99
 100 static int cdrom_log_sense(ide_drive_t *drive, struct request *rq,
 101                            struct request_sense *sense)
 102 {
 103         int log = 0;
 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         if (!cdrom_log_sense(drive, failed_command, sense))
 154                 return;
 155
 156         /*
 157          * If a read toc is executed for a CD-R or CD-RW medium where the first
 158          * toc has not been recorded yet, it will fail with 05/24/00 (which is a
 159          * confusing error)
 160          */
 161         if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
 162                 if (sense->sense_key == 0x05 && sense->asc == 0x24)
 163                         return;
 164
 165         /* current error */
 166         if (sense->error_code == 0x70) {
 167                 switch (sense->sense_key) {
 168                 case MEDIUM_ERROR:
 169                 case VOLUME_OVERFLOW:
 170                 case ILLEGAL_REQUEST:
 171                         if (!sense->valid)
 172                                 break;
 173                         if (failed_command == NULL ||
 174                                         !blk_fs_request(failed_command))
 175                                 break;
 176                         sector = (sense->information[0] << 24) |
 177                                  (sense->information[1] << 16) |
 178                                  (sense->information[2] <<  8) |
 179                                  (sense->information[3]);
 180
 181                         if (drive->queue->hardsect_size == 2048)
 182                                 /* device sector size is 2K */
 183                                 sector <<= 2;
 184
 185                         bio_sectors = max(bio_sectors(failed_command->bio), 4U);
 186                         sector &= ~(bio_sectors - 1);
 187
 188                         if (sector < get_capacity(info->disk) &&
 189                             drive->probed_capacity - sector < 4 * 75)
 190                                 set_capacity(info->disk, sector);
 191                 }
 192         }
 193
 194         ide_cd_log_error(drive->name, failed_command, sense);
 195 }
 196
 197 static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense,
 198                                       struct request *failed_command)
 199 {
 200         struct cdrom_info *info         = drive->driver_data;
 201         struct request *rq              = &info->request_sense_request;
 202
 203         if (sense == NULL)
 204                 sense = &info->sense_data;
 205
 206         /* stuff the sense request in front of our current request */
 207         blk_rq_init(NULL, rq);
 208         rq->cmd_type = REQ_TYPE_ATA_PC;
 209         rq->rq_disk = info->disk;
 210
 211         rq->data = sense;
 212         rq->cmd[0] = GPCMD_REQUEST_SENSE;
 213         rq->cmd[4] = 18;
 214         rq->data_len = 18;
 215
 216         rq->cmd_type = REQ_TYPE_SENSE;
 217         rq->cmd_flags |= REQ_PREEMPT;
 218
 219         /* NOTE! Save the failed command in "rq->buffer" */
 220         rq->buffer = (void *) failed_command;
 221
 222         ide_do_drive_cmd(drive, rq);
 223 }
 224
 225 static void cdrom_end_request(ide_drive_t *drive, int uptodate)
 226 {
 227         struct request *rq = HWGROUP(drive)->rq;
 228         int nsectors = rq->hard_cur_sectors;
 229
 230         if (blk_sense_request(rq) && uptodate) {
 231                 /*
 232                  * For REQ_TYPE_SENSE, "rq->buffer" points to the original
 233                  * failed request
 234                  */
 235                 struct request *failed = (struct request *) rq->buffer;
 236                 struct cdrom_info *info = drive->driver_data;
 237                 void *sense = &info->sense_data;
 238                 unsigned long flags;
 239
 240                 if (failed) {
 241                         if (failed->sense) {
 242                                 sense = failed->sense;
 243                                 failed->sense_len = rq->sense_len;
 244                         }
 245                         cdrom_analyze_sense_data(drive, failed, sense);
 246                         /*
 247                          * now end the failed request
 248                          */
 249                         if (blk_fs_request(failed)) {
 250                                 if (ide_end_dequeued_request(drive, failed, 0,
 251                                                 failed->hard_nr_sectors))
 252                                         BUG();
 253                         } else {
 254                                 spin_lock_irqsave(&ide_lock, flags);
 255                                 if (__blk_end_request(failed, -EIO,
 256                                                       failed->data_len))
 257                                         BUG();
 258                                 spin_unlock_irqrestore(&ide_lock, flags);
 259                         }
 260                 } else
 261                         cdrom_analyze_sense_data(drive, NULL, sense);
 262         }
 263
 264         if (!rq->current_nr_sectors && blk_fs_request(rq))
 265                 uptodate = 1;
 266         /* make sure it's fully ended */
 267         if (blk_pc_request(rq))
 268                 nsectors = (rq->data_len + 511) >> 9;
 269         if (!nsectors)
 270                 nsectors = 1;
 271
 272         ide_end_request(drive, uptodate, nsectors);
 273 }
 274
 275 static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 st)
 276 {
 277         if (st & 0x80)
 278                 return;
 279         ide_dump_status(drive, msg, st);
 280 }
 281
 282 /*
 283  * Returns:
 284  * 0: if the request should be continued.
 285  * 1: if the request was ended.
 286  */
 287 static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
 288 {
 289         ide_hwif_t *hwif = drive->hwif;
 290         struct request *rq = hwif->hwgroup->rq;
 291         int stat, err, sense_key;
 292
 293         /* check for errors */
 294         stat = hwif->tp_ops->read_status(hwif);
 295
 296         if (stat_ret)
 297                 *stat_ret = stat;
 298
 299         if (OK_STAT(stat, good_stat, BAD_R_STAT))
 300                 return 0;
 301
 302         /* get the IDE error register */
 303         err = ide_read_error(drive);
 304         sense_key = err >> 4;
 305
 306         if (rq == NULL) {
 307                 printk(KERN_ERR "%s: missing rq in %s\n",
 308                                 drive->name, __func__);
 309                 return 1;
 310         }
 311
 312         if (blk_sense_request(rq)) {
 313                 /*
 314                  * We got an error trying to get sense info from the drive
 315                  * (probably while trying to recover from a former error).
 316                  * Just give up.
 317                  */
 318                 rq->cmd_flags |= REQ_FAILED;
 319                 cdrom_end_request(drive, 0);
 320                 ide_error(drive, "request sense failure", stat);
 321                 return 1;
 322
 323         } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) {
 324                 /* All other functions, except for READ. */
 325
 326                 /*
 327                  * if we have an error, pass back CHECK_CONDITION as the
 328                  * scsi status byte
 329                  */
 330                 if (blk_pc_request(rq) && !rq->errors)
 331                         rq->errors = SAM_STAT_CHECK_CONDITION;
 332
 333                 /* check for tray open */
 334                 if (sense_key == NOT_READY) {
 335                         cdrom_saw_media_change(drive);
 336                 } else if (sense_key == UNIT_ATTENTION) {
 337                         /* check for media change */
 338                         cdrom_saw_media_change(drive);
 339                         return 0;
 340                 } else if (sense_key == ILLEGAL_REQUEST &&
 341                            rq->cmd[0] == GPCMD_START_STOP_UNIT) {
 342                         /*
 343                          * Don't print error message for this condition--
 344                          * SFF8090i indicates that 5/24/00 is the correct
 345                          * response to a request to close the tray if the
 346                          * drive doesn't have that capability.
 347                          * cdrom_log_sense() knows this!
 348                          */
 349                 } else if (!(rq->cmd_flags & REQ_QUIET)) {
 350                         /* otherwise, print an error */
 351                         ide_dump_status(drive, "packet command error", stat);
 352                 }
 353
 354                 rq->cmd_flags |= REQ_FAILED;
 355
 356                 /*
 357                  * instead of playing games with moving completions around,
 358                  * remove failed request completely and end it when the
 359                  * request sense has completed
 360                  */
 361                 goto end_request;
 362
 363         } else if (blk_fs_request(rq)) {
 364                 int do_end_request = 0;
 365
 366                 /* handle errors from READ and WRITE requests */
 367
 368                 if (blk_noretry_request(rq))
 369                         do_end_request = 1;
 370
 371                 if (sense_key == NOT_READY) {
 372                         /* tray open */
 373                         if (rq_data_dir(rq) == READ) {
 374                                 cdrom_saw_media_change(drive);
 375
 376                                 /* fail the request */
 377                                 printk(KERN_ERR "%s: tray open\n", drive->name);
 378                                 do_end_request = 1;
 379                         } else {
 380                                 struct cdrom_info *info = drive->driver_data;
 381
 382                                 /*
 383                                  * Allow the drive 5 seconds to recover, some
 384                                  * devices will return this error while flushing
 385                                  * data from cache.
 386                                  */
 387                                 if (!rq->errors)
 388                                         info->write_timeout = jiffies +
 389                                                         ATAPI_WAIT_WRITE_BUSY;
 390                                 rq->errors = 1;
 391                                 if (time_after(jiffies, info->write_timeout))
 392                                         do_end_request = 1;
 393                                 else {
 394                                         unsigned long flags;
 395
 396                                         /*
 397                                          * take a breather relying on the unplug
 398                                          * timer to kick us again
 399                                          */
 400                                         spin_lock_irqsave(&ide_lock, flags);
 401                                         blk_plug_device(drive->queue);
 402                                         spin_unlock_irqrestore(&ide_lock,
 403                                                                 flags);
 404                                         return 1;
 405                                 }
 406                         }
 407                 } else if (sense_key == UNIT_ATTENTION) {
 408                         /* media change */
 409                         cdrom_saw_media_change(drive);
 410
 411                         /*
 412                          * Arrange to retry the request but be sure to give up
 413                          * if we've retried too many times.
 414                          */
 415                         if (++rq->errors > ERROR_MAX)
 416                                 do_end_request = 1;
 417                 } else if (sense_key == ILLEGAL_REQUEST ||
 418                            sense_key == DATA_PROTECT) {
 419                         /*
 420                          * No point in retrying after an illegal request or data
 421                          * protect error.
 422                          */
 423                         ide_dump_status_no_sense(drive, "command error", stat);
 424                         do_end_request = 1;
 425                 } else if (sense_key == MEDIUM_ERROR) {
 426                         /*
 427                          * No point in re-trying a zillion times on a bad
 428                          * sector. If we got here the error is not correctable.
 429                          */
 430                         ide_dump_status_no_sense(drive,
 431                                                  "media error (bad sector)",
 432                                                  stat);
 433                         do_end_request = 1;
 434                 } else if (sense_key == BLANK_CHECK) {
 435                         /* disk appears blank ?? */
 436                         ide_dump_status_no_sense(drive, "media error (blank)",
 437                                                  stat);
 438                         do_end_request = 1;
 439                 } else if ((err & ~ATA_ABORTED) != 0) {
 440                         /* go to the default handler for other errors */
 441                         ide_error(drive, "cdrom_decode_status", stat);
 442                         return 1;
 443                 } else if ((++rq->errors > ERROR_MAX)) {
 444                         /* we've racked up too many retries, abort */
 445                         do_end_request = 1;
 446                 }
 447
 448                 /*
 449                  * End a request through request sense analysis when we have
 450                  * sense data. We need this in order to perform end of media
 451                  * processing.
 452                  */
 453                 if (do_end_request)
 454                         goto end_request;
 455
 456                 /*
 457                  * If we got a CHECK_CONDITION status, queue
 458                  * a request sense command.
 459                  */
 460                 if (stat & ATA_ERR)
 461                         cdrom_queue_request_sense(drive, NULL, NULL);
 462         } else {
 463                 blk_dump_rq_flags(rq, "ide-cd: bad rq");
 464                 cdrom_end_request(drive, 0);
 465         }
 466
 467         /* retry, or handle the next request */
 468         return 1;
 469
 470 end_request:
 471         if (stat & ATA_ERR) {
 472                 unsigned long flags;
 473
 474                 spin_lock_irqsave(&ide_lock, flags);
 475                 blkdev_dequeue_request(rq);
 476                 HWGROUP(drive)->rq = NULL;
 477                 spin_unlock_irqrestore(&ide_lock, flags);
 478
 479                 cdrom_queue_request_sense(drive, rq->sense, rq);
 480         } else
 481                 cdrom_end_request(drive, 0);
 482
 483         return 1;
 484 }
 485
 486 static int cdrom_timer_expiry(ide_drive_t *drive)
 487 {
 488         struct request *rq = HWGROUP(drive)->rq;
 489         unsigned long wait = 0;
 490
 491         /*
 492          * Some commands are *slow* and normally take a long time to complete.
 493          * Usually we can use the ATAPI "disconnect" to bypass this, but not all
 494          * commands/drives support that. Let ide_timer_expiry keep polling us
 495          * for these.
 496          */
 497         switch (rq->cmd[0]) {
 498         case GPCMD_BLANK:
 499         case GPCMD_FORMAT_UNIT:
 500         case GPCMD_RESERVE_RZONE_TRACK:
 501         case GPCMD_CLOSE_TRACK:
 502         case GPCMD_FLUSH_CACHE:
 503                 wait = ATAPI_WAIT_PC;
 504                 break;
 505         default:
 506                 if (!(rq->cmd_flags & REQ_QUIET))
 507                         printk(KERN_INFO "ide-cd: cmd 0x%x timed out\n",
 508                                          rq->cmd[0]);
 509                 wait = 0;
 510                 break;
 511         }
 512         return wait;
 513 }
 514
 515 /*
 516  * Set up the device registers for transferring a packet command on DEV,
 517  * expecting to later transfer XFERLEN bytes.  HANDLER is the routine
 518  * which actually transfers the command to the drive.  If this is a
 519  * drq_interrupt device, this routine will arrange for HANDLER to be
 520  * called when the interrupt from the drive arrives.  Otherwise, HANDLER
 521  * will be called immediately after the drive is prepared for the transfer.
 522  */
 523 static ide_startstop_t cdrom_start_packet_command(ide_drive_t *drive,
 524                                                   int xferlen,
 525                                                   ide_handler_t *handler)
 526 {
 527         struct cdrom_info *info = drive->driver_data;
 528         ide_hwif_t *hwif = drive->hwif;
 529
 530         /* FIXME: for Virtual DMA we must check harder */
 531         if (info->dma)
 532                 info->dma = !hwif->dma_ops->dma_setup(drive);
 533
 534         /* set up the controller registers */
 535         ide_pktcmd_tf_load(drive, IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL,
 536                            xferlen, info->dma);
 537
 538         if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
 539                 /* waiting for CDB interrupt, not DMA yet. */
 540                 if (info->dma)
 541                         drive->waiting_for_dma = 0;
 542
 543                 /* packet command */
 544                 ide_execute_command(drive, ATA_CMD_PACKET, handler,
 545                                     ATAPI_WAIT_PC, cdrom_timer_expiry);
 546                 return ide_started;
 547         } else {
 548                 ide_execute_pkt_cmd(drive);
 549
 550                 return (*handler) (drive);
 551         }
 552 }
 553
 554 /*
 555  * Send a packet command to DRIVE described by CMD_BUF and CMD_LEN. The device
 556  * registers must have already been prepared by cdrom_start_packet_command.
 557  * HANDLER is the interrupt handler to call when the command completes or
 558  * there's data ready.
 559  */
 560 #define ATAPI_MIN_CDB_BYTES 12
 561 static ide_startstop_t cdrom_transfer_packet_command(ide_drive_t *drive,
 562                                           struct request *rq,
 563                                           ide_handler_t *handler)
 564 {
 565         ide_hwif_t *hwif = drive->hwif;
 566         int cmd_len;
 567         struct cdrom_info *info = drive->driver_data;
 568         ide_startstop_t startstop;
 569
 570         if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
 571                 /*
 572                  * Here we should have been called after receiving an interrupt
 573                  * from the device.  DRQ should how be set.
 574                  */
 575
 576                 /* check for errors */
 577                 if (cdrom_decode_status(drive, ATA_DRQ, NULL))
 578                         return ide_stopped;
 579
 580                 /* ok, next interrupt will be DMA interrupt */
 581                 if (info->dma)
 582                         drive->waiting_for_dma = 1;
 583         } else {
 584                 /* otherwise, we must wait for DRQ to get set */
 585                 if (ide_wait_stat(&startstop, drive, ATA_DRQ,
 586                                   ATA_BUSY, WAIT_READY))
 587                         return startstop;
 588         }
 589
 590         /* arm the interrupt handler */
 591         ide_set_handler(drive, handler, rq->timeout, cdrom_timer_expiry);
 592
 593         /* ATAPI commands get padded out to 12 bytes minimum */
 594         cmd_len = COMMAND_SIZE(rq->cmd[0]);
 595         if (cmd_len < ATAPI_MIN_CDB_BYTES)
 596                 cmd_len = ATAPI_MIN_CDB_BYTES;
 597
 598         /* send the command to the device */
 599         hwif->tp_ops->output_data(drive, NULL, rq->cmd, cmd_len);
 600
 601         /* start the DMA if need be */
 602         if (info->dma)
 603                 hwif->dma_ops->dma_start(drive);
 604
 605         return ide_started;
 606 }
 607
 608 /*
 609  * Check the contents of the interrupt reason register from the cdrom
 610  * and attempt to recover if there are problems.  Returns  0 if everything's
 611  * ok; nonzero if the request has been terminated.
 612  */
 613 static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
 614                                 int len, int ireason, int rw)
 615 {
 616         ide_hwif_t *hwif = drive->hwif;
 617
 618         /*
 619          * ireason == 0: the drive wants to receive data from us
 620          * ireason == 2: the drive is expecting to transfer data to us
 621          */
 622         if (ireason == (!rw << 1))
 623                 return 0;
 624         else if (ireason == (rw << 1)) {
 625
 626                 /* whoops... */
 627                 printk(KERN_ERR "%s: %s: wrong transfer direction!\n",
 628                                 drive->name, __func__);
 629
 630                 ide_pad_transfer(drive, rw, len);
 631         } else  if (rw == 0 && ireason == 1) {
 632                 /*
 633                  * Some drives (ASUS) seem to tell us that status info is
 634                  * available.  Just get it and ignore.
 635                  */
 636                 (void)hwif->tp_ops->read_status(hwif);
 637                 return 0;
 638         } else {
 639                 /* drive wants a command packet, or invalid ireason... */
 640                 printk(KERN_ERR "%s: %s: bad interrupt reason 0x%02x\n",
 641                                 drive->name, __func__, ireason);
 642         }
 643
 644         if (rq->cmd_type == REQ_TYPE_ATA_PC)
 645                 rq->cmd_flags |= REQ_FAILED;
 646
 647         cdrom_end_request(drive, 0);
 648         return -1;
 649 }
 650
 651 /*
 652  * Assume that the drive will always provide data in multiples of at least
 653  * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise.
 654  */
 655 static int ide_cd_check_transfer_size(ide_drive_t *drive, int len)
 656 {
 657         if ((len % SECTOR_SIZE) == 0)
 658                 return 0;
 659
 660         printk(KERN_ERR "%s: %s: Bad transfer size %d\n",
 661                         drive->name, __func__, len);
 662
 663         if (drive->atapi_flags & IDE_AFLAG_LIMIT_NFRAMES)
 664                 printk(KERN_ERR "  This drive is not supported by "
 665                                 "this version of the driver\n");
 666         else {
 667                 printk(KERN_ERR "  Trying to limit transfer sizes\n");
 668                 drive->atapi_flags |= IDE_AFLAG_LIMIT_NFRAMES;
 669         }
 670
 671         return 1;
 672 }
 673
 674 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *);
 675
 676 static ide_startstop_t ide_cd_prepare_rw_request(ide_drive_t *drive,
 677                                                  struct request *rq)
 678 {
 679         if (rq_data_dir(rq) == READ) {
 680                 unsigned short sectors_per_frame =
 681                         queue_hardsect_size(drive->queue) >> SECTOR_BITS;
 682                 int nskip = rq->sector & (sectors_per_frame - 1);
 683
 684                 /*
 685                  * If the requested sector doesn't start on a frame boundary,
 686                  * we must adjust the start of the transfer so that it does,
 687                  * and remember to skip the first few sectors.
 688                  *
 689                  * If the rq->current_nr_sectors field is larger than the size
 690                  * of the buffer, it will mean that we're to skip a number of
 691                  * sectors equal to the amount by which rq->current_nr_sectors
 692                  * is larger than the buffer size.
 693                  */
 694                 if (nskip > 0) {
 695                         /* sanity check... */
 696                         if (rq->current_nr_sectors !=
 697                             bio_cur_sectors(rq->bio)) {
 698                                 printk(KERN_ERR "%s: %s: buffer botch (%u)\n",
 699                                                 drive->name, __func__,
 700                                                 rq->current_nr_sectors);
 701                                 cdrom_end_request(drive, 0);
 702                                 return ide_stopped;
 703                         }
 704                         rq->current_nr_sectors += nskip;
 705                 }
 706         }
 707 #if 0
 708         else
 709                 /* the immediate bit */
 710                 rq->cmd[1] = 1 << 3;
 711 #endif
 712         /* set up the command */
 713         rq->timeout = ATAPI_WAIT_PC;
 714
 715         return ide_started;
 716 }
 717
 718 /*
 719  * Routine to send a read/write packet command to the drive. This is usually
 720  * called directly from cdrom_start_{read,write}(). However, for drq_interrupt
 721  * devices, it is called from an interrupt when the drive is ready to accept
 722  * the command.
 723  */
 724 static ide_startstop_t cdrom_start_rw_cont(ide_drive_t *drive)
 725 {
 726         struct request *rq = drive->hwif->hwgroup->rq;
 727
 728         /* send the command to the drive and return */
 729         return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
 730 }
 731
 732 #define IDECD_SEEK_THRESHOLD    (1000)                  /* 1000 blocks */
 733 #define IDECD_SEEK_TIMER        (5 * WAIT_MIN_SLEEP)    /* 100 ms */
 734 #define IDECD_SEEK_TIMEOUT      (2 * WAIT_CMD)          /* 20 sec */
 735
 736 static ide_startstop_t cdrom_seek_intr(ide_drive_t *drive)
 737 {
 738         struct cdrom_info *info = drive->driver_data;
 739         int stat;
 740         static int retry = 10;
 741
 742         if (cdrom_decode_status(drive, 0, &stat))
 743                 return ide_stopped;
 744
 745         drive->atapi_flags |= IDE_AFLAG_SEEKING;
 746
 747         if (retry && time_after(jiffies, info->start_seek + IDECD_SEEK_TIMER)) {
 748                 if (--retry == 0)
 749                         drive->dsc_overlap = 0;
 750         }
 751         return ide_stopped;
 752 }
 753
 754 static void ide_cd_prepare_seek_request(ide_drive_t *drive, struct request *rq)
 755 {
 756         sector_t frame = rq->sector;
 757
 758         sector_div(frame, queue_hardsect_size(drive->queue) >> SECTOR_BITS);
 759
 760         memset(rq->cmd, 0, BLK_MAX_CDB);
 761         rq->cmd[0] = GPCMD_SEEK;
 762         put_unaligned(cpu_to_be32(frame), (unsigned int *) &rq->cmd[2]);
 763
 764         rq->timeout = ATAPI_WAIT_PC;
 765 }
 766
 767 static ide_startstop_t cdrom_start_seek_continuation(ide_drive_t *drive)
 768 {
 769         struct request *rq = drive->hwif->hwgroup->rq;
 770
 771         return cdrom_transfer_packet_command(drive, rq, &cdrom_seek_intr);
 772 }
 773
 774 /*
 775  * Fix up a possibly partially-processed request so that we can start it over
 776  * entirely, or even put it back on the request queue.
 777  */
 778 static void restore_request(struct request *rq)
 779 {
 780         if (rq->buffer != bio_data(rq->bio)) {
 781                 sector_t n =
 782                         (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE;
 783
 784                 rq->buffer = bio_data(rq->bio);
 785                 rq->nr_sectors += n;
 786                 rq->sector -= n;
 787         }
 788         rq->current_nr_sectors = bio_cur_sectors(rq->bio);
 789         rq->hard_cur_sectors = rq->current_nr_sectors;
 790         rq->hard_nr_sectors = rq->nr_sectors;
 791         rq->hard_sector = rq->sector;
 792         rq->q->prep_rq_fn(rq->q, rq);
 793 }
 794
 795 /*
 796  * All other packet commands.
 797  */
 798 static void ide_cd_request_sense_fixup(struct request *rq)
 799 {
 800         /*
 801          * Some of the trailing request sense fields are optional,
 802          * and some drives don't send them.  Sigh.
 803          */
 804         if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
 805             rq->data_len > 0 && rq->data_len <= 5)
 806                 while (rq->data_len > 0) {
 807                         *(u8 *)rq->data++ = 0;
 808                         --rq->data_len;
 809                 }
 810 }
 811
 812 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
 813                     int write, void *buffer, unsigned *bufflen,
 814                     struct request_sense *sense, int timeout,
 815                     unsigned int cmd_flags)
 816 {
 817         struct cdrom_info *info = drive->driver_data;
 818         struct request_sense local_sense;
 819         int retries = 10;
 820         unsigned int flags = 0;
 821
 822         if (!sense)
 823                 sense = &local_sense;
 824
 825         /* start of retry loop */
 826         do {
 827                 struct request *rq;
 828                 int error;
 829
 830                 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
 831
 832                 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
 833                 rq->cmd_type = REQ_TYPE_ATA_PC;
 834                 rq->sense = sense;
 835                 rq->cmd_flags |= cmd_flags;
 836                 rq->timeout = timeout;
 837                 if (buffer) {
 838                         rq->data = buffer;
 839                         rq->data_len = *bufflen;
 840                 }
 841
 842                 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
 843
 844                 if (buffer)
 845                         *bufflen = rq->data_len;
 846
 847                 flags = rq->cmd_flags;
 848                 blk_put_request(rq);
 849
 850                 /*
 851                  * FIXME: we should probably abort/retry or something in case of
 852                  * failure.
 853                  */
 854                 if (flags & REQ_FAILED) {
 855                         /*
 856                          * The request failed.  Retry if it was due to a unit
 857                          * attention status (usually means media was changed).
 858                          */
 859                         struct request_sense *reqbuf = sense;
 860
 861                         if (reqbuf->sense_key == UNIT_ATTENTION)
 862                                 cdrom_saw_media_change(drive);
 863                         else if (reqbuf->sense_key == NOT_READY &&
 864                                  reqbuf->asc == 4 && reqbuf->ascq != 4) {
 865                                 /*
 866                                  * The drive is in the process of loading
 867                                  * a disk.  Retry, but wait a little to give
 868                                  * the drive time to complete the load.
 869                                  */
 870                                 ssleep(2);
 871                         } else {
 872                                 /* otherwise, don't retry */
 873                                 retries = 0;
 874                         }
 875                         --retries;
 876                 }
 877
 878                 /* end of retry loop */
 879         } while ((flags & REQ_FAILED) && retries >= 0);
 880
 881         /* return an error if the command failed */
 882         return (flags & REQ_FAILED) ? -EIO : 0;
 883 }
 884
 885 /*
 886  * Called from blk_end_request_callback() after the data of the request is
 887  * completed and before the request itself is completed. By returning value '1',
 888  * blk_end_request_callback() returns immediately without completing it.
 889  */
 890 static int cdrom_newpc_intr_dummy_cb(struct request *rq)
 891 {
 892         return 1;
 893 }
 894
 895 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 896 {
 897         ide_hwif_t *hwif = drive->hwif;
 898         struct cdrom_info *info = drive->driver_data;
 899         struct request *rq = HWGROUP(drive)->rq;
 900         xfer_func_t *xferfunc;
 901         ide_expiry_t *expiry = NULL;
 902         int dma_error = 0, dma, stat, thislen, uptodate = 0;
 903         int write = (rq_data_dir(rq) == WRITE) ? 1 : 0;
 904         unsigned int timeout;
 905         u16 len;
 906         u8 ireason;
 907
 908         /* check for errors */
 909         dma = info->dma;
 910         if (dma) {
 911                 info->dma = 0;
 912                 dma_error = hwif->dma_ops->dma_end(drive);
 913                 if (dma_error) {
 914                         printk(KERN_ERR "%s: DMA %s error\n", drive->name,
 915                                         write ? "write" : "read");
 916                         ide_dma_off(drive);
 917                 }
 918         }
 919
 920         if (cdrom_decode_status(drive, 0, &stat))
 921                 return ide_stopped;
 922
 923         /* using dma, transfer is complete now */
 924         if (dma) {
 925                 if (dma_error)
 926                         return ide_error(drive, "dma error", stat);
 927                 if (blk_fs_request(rq)) {
 928                         ide_end_request(drive, 1, rq->nr_sectors);
 929                         return ide_stopped;
 930                 }
 931                 goto end_request;
 932         }
 933
 934         ide_read_bcount_and_ireason(drive, &len, &ireason);
 935
 936         thislen = blk_fs_request(rq) ? len : rq->data_len;
 937         if (thislen > len)
 938                 thislen = len;
 939
 940         /* If DRQ is clear, the command has completed. */
 941         if ((stat & ATA_DRQ) == 0) {
 942                 if (blk_fs_request(rq)) {
 943                         /*
 944                          * If we're not done reading/writing, complain.
 945                          * Otherwise, complete the command normally.
 946                          */
 947                         uptodate = 1;
 948                         if (rq->current_nr_sectors > 0) {
 949                                 printk(KERN_ERR "%s: %s: data underrun "
 950                                                 "(%d blocks)\n",
 951                                                 drive->name, __func__,
 952                                                 rq->current_nr_sectors);
 953                                 if (!write)
 954                                         rq->cmd_flags |= REQ_FAILED;
 955                                 uptodate = 0;
 956                         }
 957                         cdrom_end_request(drive, uptodate);
 958                         return ide_stopped;
 959                 } else if (!blk_pc_request(rq)) {
 960                         ide_cd_request_sense_fixup(rq);
 961                         /* complain if we still have data left to transfer */
 962                         uptodate = rq->data_len ? 0 : 1;
 963                 }
 964                 goto end_request;
 965         }
 966
 967         /* check which way to transfer data */
 968         if (ide_cd_check_ireason(drive, rq, len, ireason, write))
 969                 return ide_stopped;
 970
 971         if (blk_fs_request(rq)) {
 972                 if (write == 0) {
 973                         int nskip;
 974
 975                         if (ide_cd_check_transfer_size(drive, len)) {
 976                                 cdrom_end_request(drive, 0);
 977                                 return ide_stopped;
 978                         }
 979
 980                         /*
 981                          * First, figure out if we need to bit-bucket
 982                          * any of the leading sectors.
 983                          */
 984                         nskip = min_t(int, rq->current_nr_sectors
 985                                            - bio_cur_sectors(rq->bio),
 986                                            thislen >> 9);
 987                         if (nskip > 0) {
 988                                 ide_pad_transfer(drive, write, nskip << 9);
 989                                 rq->current_nr_sectors -= nskip;
 990                                 thislen -= (nskip << 9);
 991                         }
 992                 }
 993         }
 994
 995         if (ireason == 0) {
 996                 write = 1;
 997                 xferfunc = hwif->tp_ops->output_data;
 998         } else {
 999                 write = 0;
1000                 xferfunc = hwif->tp_ops->input_data;
1001         }
1002
1003         /* transfer data */
1004         while (thislen > 0) {
1005                 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data;
1006                 int blen = rq->data_len;
1007
1008                 /* bio backed? */
1009                 if (rq->bio) {
1010                         if (blk_fs_request(rq)) {
1011                                 ptr = rq->buffer;
1012                                 blen = rq->current_nr_sectors << 9;
1013                         } else {
1014                                 ptr = bio_data(rq->bio);
1015                                 blen = bio_iovec(rq->bio)->bv_len;
1016                         }
1017                 }
1018
1019                 if (!ptr) {
1020                         if (blk_fs_request(rq) && !write)
1021                                 /*
1022                                  * If the buffers are full, pipe the rest into
1023                                  * oblivion.
1024                                  */
1025                                 ide_pad_transfer(drive, 0, thislen);
1026                         else {
1027                                 printk(KERN_ERR "%s: confused, missing data\n",
1028                                                 drive->name);
1029                                 blk_dump_rq_flags(rq, rq_data_dir(rq)
1030                                                   ? "cdrom_newpc_intr, write"
1031                                                   : "cdrom_newpc_intr, read");
1032                         }
1033                         break;
1034                 }
1035
1036                 if (blen > thislen)
1037                         blen = thislen;
1038
1039                 xferfunc(drive, NULL, ptr, blen);
1040
1041                 thislen -= blen;
1042                 len -= blen;
1043
1044                 if (blk_fs_request(rq)) {
1045                         rq->buffer += blen;
1046                         rq->nr_sectors -= (blen >> 9);
1047                         rq->current_nr_sectors -= (blen >> 9);
1048                         rq->sector += (blen >> 9);
1049
1050                         if (rq->current_nr_sectors == 0 && rq->nr_sectors)
1051                                 cdrom_end_request(drive, 1);
1052                 } else {
1053                         rq->data_len -= blen;
1054
1055                         /*
1056                          * The request can't be completed until DRQ is cleared.
1057                          * So complete the data, but don't complete the request
1058                          * using the dummy function for the callback feature
1059                          * of blk_end_request_callback().
1060                          */
1061                         if (rq->bio)
1062                                 blk_end_request_callback(rq, 0, blen,
1063                                                  cdrom_newpc_intr_dummy_cb);
1064                         else
1065                                 rq->data += blen;
1066                 }
1067                 if (!write && blk_sense_request(rq))
1068                         rq->sense_len += blen;
1069         }
1070
1071         /* pad, if necessary */
1072         if (!blk_fs_request(rq) && len > 0)
1073                 ide_pad_transfer(drive, write, len);
1074
1075         if (blk_pc_request(rq)) {
1076                 timeout = rq->timeout;
1077         } else {
1078                 timeout = ATAPI_WAIT_PC;
1079                 if (!blk_fs_request(rq))
1080                         expiry = cdrom_timer_expiry;
1081         }
1082
1083         ide_set_handler(drive, cdrom_newpc_intr, timeout, expiry);
1084         return ide_started;
1085
1086 end_request:
1087         if (blk_pc_request(rq)) {
1088                 unsigned long flags;
1089                 unsigned int dlen = rq->data_len;
1090
1091                 if (dma)
1092                         rq->data_len = 0;
1093
1094                 spin_lock_irqsave(&ide_lock, flags);
1095                 if (__blk_end_request(rq, 0, dlen))
1096                         BUG();
1097                 HWGROUP(drive)->rq = NULL;
1098                 spin_unlock_irqrestore(&ide_lock, flags);
1099         } else {
1100                 if (!uptodate)
1101                         rq->cmd_flags |= REQ_FAILED;
1102                 cdrom_end_request(drive, uptodate);
1103         }
1104         return ide_stopped;
1105 }
1106
1107 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
1108 {
1109         struct cdrom_info *cd = drive->driver_data;
1110         int write = rq_data_dir(rq) == WRITE;
1111         unsigned short sectors_per_frame =
1112                 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
1113
1114         if (write) {
1115                 /* disk has become write protected */
1116                 if (get_disk_ro(cd->disk)) {
1117                         cdrom_end_request(drive, 0);
1118                         return ide_stopped;
1119                 }
1120         } else {
1121                 /*
1122                  * We may be retrying this request after an error.  Fix up any
1123                  * weirdness which might be present in the request packet.
1124                  */
1125                 restore_request(rq);
1126         }
1127
1128         /* use DMA, if possible / writes *must* be hardware frame aligned */
1129         if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
1130             (rq->sector & (sectors_per_frame - 1))) {
1131                 if (write) {
1132                         cdrom_end_request(drive, 0);
1133                         return ide_stopped;
1134                 }
1135                 cd->dma = 0;
1136         } else
1137                 cd->dma = drive->using_dma;
1138
1139         if (write)
1140                 cd->devinfo.media_written = 1;
1141
1142         return ide_started;
1143 }
1144
1145 static ide_startstop_t cdrom_do_newpc_cont(ide_drive_t *drive)
1146 {
1147         struct request *rq = HWGROUP(drive)->rq;
1148
1149         return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
1150 }
1151
1152 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
1153 {
1154         struct cdrom_info *info = drive->driver_data;
1155
1156         if (blk_pc_request(rq))
1157                 rq->cmd_flags |= REQ_QUIET;
1158         else
1159                 rq->cmd_flags &= ~REQ_FAILED;
1160
1161         info->dma = 0;
1162
1163         /* sg request */
1164         if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) {
1165                 struct request_queue *q = drive->queue;
1166                 unsigned int alignment;
1167                 char *buf;
1168
1169                 if (rq->bio)
1170                         buf = bio_data(rq->bio);
1171                 else
1172                         buf = rq->data;
1173
1174                 info->dma = drive->using_dma;
1175
1176                 /*
1177                  * check if dma is safe
1178                  *
1179                  * NOTE! The "len" and "addr" checks should possibly have
1180                  * separate masks.
1181                  */
1182                 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
1183                 if ((unsigned long)buf & alignment || rq->data_len & alignment
1184                     || object_is_on_stack(buf))
1185                         info->dma = 0;
1186         }
1187 }
1188
1189 /*
1190  * cdrom driver request routine.
1191  */
1192 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
1193                                         sector_t block)
1194 {
1195         struct cdrom_info *info = drive->driver_data;
1196         ide_handler_t *fn;
1197         int xferlen;
1198
1199         if (blk_fs_request(rq)) {
1200                 if (drive->atapi_flags & IDE_AFLAG_SEEKING) {
1201                         ide_hwif_t *hwif = drive->hwif;
1202                         unsigned long elapsed = jiffies - info->start_seek;
1203                         int stat = hwif->tp_ops->read_status(hwif);
1204
1205                         if ((stat & ATA_DSC) != ATA_DSC) {
1206                                 if (elapsed < IDECD_SEEK_TIMEOUT) {
1207                                         ide_stall_queue(drive,
1208                                                         IDECD_SEEK_TIMER);
1209                                         return ide_stopped;
1210                                 }
1211                                 printk(KERN_ERR "%s: DSC timeout\n",
1212                                                 drive->name);
1213                         }
1214                         drive->atapi_flags &= ~IDE_AFLAG_SEEKING;
1215                 }
1216                 if (rq_data_dir(rq) == READ &&
1217                     IDE_LARGE_SEEK(info->last_block, block,
1218                             IDECD_SEEK_THRESHOLD) &&
1219                     drive->dsc_overlap) {
1220                         xferlen = 0;
1221                         fn = cdrom_start_seek_continuation;
1222
1223                         info->dma = 0;
1224                         info->start_seek = jiffies;
1225
1226                         ide_cd_prepare_seek_request(drive, rq);
1227                 } else {
1228                         xferlen = 32768;
1229                         fn = cdrom_start_rw_cont;
1230
1231                         if (cdrom_start_rw(drive, rq) == ide_stopped)
1232                                 return ide_stopped;
1233
1234                         if (ide_cd_prepare_rw_request(drive, rq) == ide_stopped)
1235                                 return ide_stopped;
1236                 }
1237                 info->last_block = block;
1238         } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
1239                    rq->cmd_type == REQ_TYPE_ATA_PC) {
1240                 xferlen = rq->data_len;
1241                 fn = cdrom_do_newpc_cont;
1242
1243                 if (!rq->timeout)
1244                         rq->timeout = ATAPI_WAIT_PC;
1245
1246                 cdrom_do_block_pc(drive, rq);
1247         } else if (blk_special_request(rq)) {
1248                 /* right now this can only be a reset... */
1249                 cdrom_end_request(drive, 1);
1250                 return ide_stopped;
1251         } else {
1252                 blk_dump_rq_flags(rq, "ide-cd bad flags");
1253                 cdrom_end_request(drive, 0);
1254                 return ide_stopped;
1255         }
1256
1257         return cdrom_start_packet_command(drive, xferlen, fn);
1258 }
1259
1260 /*
1261  * Ioctl handling.
1262  *
1263  * Routines which queue packet commands take as a final argument a pointer to a
1264  * request_sense struct. If execution of the command results in an error with a
1265  * CHECK CONDITION status, this structure will be filled with the results of the
1266  * subsequent request sense command. The pointer can also be NULL, in which case
1267  * no sense information is returned.
1268  */
1269 static void msf_from_bcd(struct atapi_msf *msf)
1270 {
1271         msf->minute = bcd2bin(msf->minute);
1272         msf->second = bcd2bin(msf->second);
1273         msf->frame  = bcd2bin(msf->frame);
1274 }
1275
1276 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
1277 {
1278         struct cdrom_info *info = drive->driver_data;
1279         struct cdrom_device_info *cdi = &info->devinfo;
1280         unsigned char cmd[BLK_MAX_CDB];
1281
1282         memset(cmd, 0, BLK_MAX_CDB);
1283         cmd[0] = GPCMD_TEST_UNIT_READY;
1284
1285         /*
1286          * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
1287          * instead of supporting the LOAD_UNLOAD opcode.
1288          */
1289         cmd[7] = cdi->sanyo_slot % 3;
1290
1291         return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
1292 }
1293
1294 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
1295                                unsigned long *sectors_per_frame,
1296                                struct request_sense *sense)
1297 {
1298         struct {
1299                 __be32 lba;
1300                 __be32 blocklen;
1301         } capbuf;
1302
1303         int stat;
1304         unsigned char cmd[BLK_MAX_CDB];
1305         unsigned len = sizeof(capbuf);
1306         u32 blocklen;
1307
1308         memset(cmd, 0, BLK_MAX_CDB);
1309         cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1310
1311         stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
1312                                REQ_QUIET);
1313         if (stat)
1314                 return stat;
1315
1316         /*
1317          * Sanity check the given block size
1318          */
1319         blocklen = be32_to_cpu(capbuf.blocklen);
1320         switch (blocklen) {
1321         case 512:
1322         case 1024:
1323         case 2048:
1324         case 4096:
1325                 break;
1326         default:
1327                 printk(KERN_ERR "%s: weird block size %u\n",
1328                         drive->name, blocklen);
1329                 printk(KERN_ERR "%s: default to 2kb block size\n",
1330                         drive->name);
1331                 blocklen = 2048;
1332                 break;
1333         }
1334
1335         *capacity = 1 + be32_to_cpu(capbuf.lba);
1336         *sectors_per_frame = blocklen >> SECTOR_BITS;
1337         return 0;
1338 }
1339
1340 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1341                                 int format, char *buf, int buflen,
1342                                 struct request_sense *sense)
1343 {
1344         unsigned char cmd[BLK_MAX_CDB];
1345
1346         memset(cmd, 0, BLK_MAX_CDB);
1347
1348         cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1349         cmd[6] = trackno;
1350         cmd[7] = (buflen >> 8);
1351         cmd[8] = (buflen & 0xff);
1352         cmd[9] = (format << 6);
1353
1354         if (msf_flag)
1355                 cmd[1] = 2;
1356
1357         return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
1358 }
1359
1360 /* Try to read the entire TOC for the disk into our internal buffer. */
1361 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1362 {
1363         int stat, ntracks, i;
1364         struct cdrom_info *info = drive->driver_data;
1365         struct cdrom_device_info *cdi = &info->devinfo;
1366         struct atapi_toc *toc = info->toc;
1367         struct {
1368                 struct atapi_toc_header hdr;
1369                 struct atapi_toc_entry  ent;
1370         } ms_tmp;
1371         long last_written;
1372         unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1373
1374         if (toc == NULL) {
1375                 /* try to allocate space */
1376                 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1377                 if (toc == NULL) {
1378                         printk(KERN_ERR "%s: No cdrom TOC buffer!\n",
1379                                         drive->name);
1380                         return -ENOMEM;
1381                 }
1382                 info->toc = toc;
1383         }
1384
1385         /*
1386          * Check to see if the existing data is still valid. If it is,
1387          * just return.
1388          */
1389         (void) cdrom_check_status(drive, sense);
1390
1391         if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
1392                 return 0;
1393
1394         /* try to get the total cdrom capacity and sector size */
1395         stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1396                                    sense);
1397         if (stat)
1398                 toc->capacity = 0x1fffff;
1399
1400         set_capacity(info->disk, toc->capacity * sectors_per_frame);
1401         /* save a private copy of the TOC capacity for error handling */
1402         drive->probed_capacity = toc->capacity * sectors_per_frame;
1403
1404         blk_queue_hardsect_size(drive->queue,
1405                                 sectors_per_frame << SECTOR_BITS);
1406
1407         /* first read just the header, so we know how long the TOC is */
1408         stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1409                                     sizeof(struct atapi_toc_header), sense);
1410         if (stat)
1411                 return stat;
1412
1413         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1414                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1415                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1416         }
1417
1418         ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1419         if (ntracks <= 0)
1420                 return -EIO;
1421         if (ntracks > MAX_TRACKS)
1422                 ntracks = MAX_TRACKS;
1423
1424         /* now read the whole schmeer */
1425         stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1426                                   (char *)&toc->hdr,
1427                                    sizeof(struct atapi_toc_header) +
1428                                    (ntracks + 1) *
1429                                    sizeof(struct atapi_toc_entry), sense);
1430
1431         if (stat && toc->hdr.first_track > 1) {
1432                 /*
1433                  * Cds with CDI tracks only don't have any TOC entries, despite
1434                  * of this the returned values are
1435                  * first_track == last_track = number of CDI tracks + 1,
1436                  * so that this case is indistinguishable from the same layout
1437                  * plus an additional audio track. If we get an error for the
1438                  * regular case, we assume a CDI without additional audio
1439                  * tracks. In this case the readable TOC is empty (CDI tracks
1440                  * are not included) and only holds the Leadout entry.
1441                  *
1442                  * Heiko Eißfeldt.
1443                  */
1444                 ntracks = 0;
1445                 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1446                                            (char *)&toc->hdr,
1447                                            sizeof(struct atapi_toc_header) +
1448                                            (ntracks + 1) *
1449                                            sizeof(struct atapi_toc_entry),
1450                                            sense);
1451                 if (stat)
1452                         return stat;
1453
1454                 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1455                         toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1456                         toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1457                 } else {
1458                         toc->hdr.first_track = CDROM_LEADOUT;
1459                         toc->hdr.last_track = CDROM_LEADOUT;
1460                 }
1461         }
1462
1463         if (stat)
1464                 return stat;
1465
1466         toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1467
1468         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1469                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1470                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1471         }
1472
1473         for (i = 0; i <= ntracks; i++) {
1474                 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1475                         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1476                                 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1477                         msf_from_bcd(&toc->ent[i].addr.msf);
1478                 }
1479                 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1480                                                   toc->ent[i].addr.msf.second,
1481                                                   toc->ent[i].addr.msf.frame);
1482         }
1483
1484         if (toc->hdr.first_track != CDROM_LEADOUT) {
1485                 /* read the multisession information */
1486                 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1487                                            sizeof(ms_tmp), sense);
1488                 if (stat)
1489                         return stat;
1490
1491                 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1492         } else {
1493                 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1494                 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1495                 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1496         }
1497
1498         if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1499                 /* re-read multisession information using MSF format */
1500                 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1501                                            sizeof(ms_tmp), sense);
1502                 if (stat)
1503                         return stat;
1504
1505                 msf_from_bcd(&ms_tmp.ent.addr.msf);
1506                 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1507                                                    ms_tmp.ent.addr.msf.second,
1508                                                    ms_tmp.ent.addr.msf.frame);
1509         }
1510
1511         toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1512
1513         /* now try to get the total cdrom capacity */
1514         stat = cdrom_get_last_written(cdi, &last_written);
1515         if (!stat && (last_written > toc->capacity)) {
1516                 toc->capacity = last_written;
1517                 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1518                 drive->probed_capacity = toc->capacity * sectors_per_frame;
1519         }
1520
1521         /* Remember that we've read this stuff. */
1522         drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1523
1524         return 0;
1525 }
1526
1527 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1528 {
1529         struct cdrom_info *info = drive->driver_data;
1530         struct cdrom_device_info *cdi = &info->devinfo;
1531         struct packet_command cgc;
1532         int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1533
1534         if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1535                 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1536
1537         init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1538         do {
1539                 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1540                 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1541                 if (!stat)
1542                         break;
1543         } while (--attempts);
1544         return stat;
1545 }
1546
1547 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1548 {
1549         struct cdrom_info *cd = drive->driver_data;
1550         u16 curspeed, maxspeed;
1551
1552         if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1553                 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1554                 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1555         } else {
1556                 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1557                 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1558         }
1559
1560         cd->current_speed = (curspeed + (176/2)) / 176;
1561         cd->max_speed = (maxspeed + (176/2)) / 176;
1562 }
1563
1564 #define IDE_CD_CAPABILITIES \
1565         (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1566          CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1567          CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1568          CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1569          CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1570
1571 static struct cdrom_device_ops ide_cdrom_dops = {
1572         .open                   = ide_cdrom_open_real,
1573         .release                = ide_cdrom_release_real,
1574         .drive_status           = ide_cdrom_drive_status,
1575         .media_changed          = ide_cdrom_check_media_change_real,
1576         .tray_move              = ide_cdrom_tray_move,
1577         .lock_door              = ide_cdrom_lock_door,
1578         .select_speed           = ide_cdrom_select_speed,
1579         .get_last_session       = ide_cdrom_get_last_session,
1580         .get_mcn                = ide_cdrom_get_mcn,
1581         .reset                  = ide_cdrom_reset,
1582         .audio_ioctl            = ide_cdrom_audio_ioctl,
1583         .capability             = IDE_CD_CAPABILITIES,
1584         .generic_packet         = ide_cdrom_packet,
1585 };
1586
1587 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1588 {
1589         struct cdrom_info *info = drive->driver_data;
1590         struct cdrom_device_info *devinfo = &info->devinfo;
1591
1592         devinfo->ops = &ide_cdrom_dops;
1593         devinfo->speed = info->current_speed;
1594         devinfo->capacity = nslots;
1595         devinfo->handle = drive;
1596         strcpy(devinfo->name, drive->name);
1597
1598         if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1599                 devinfo->mask |= CDC_SELECT_SPEED;
1600
1601         devinfo->disk = info->disk;
1602         return register_cdrom(devinfo);
1603 }
1604
1605 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1606 {
1607         struct cdrom_info *cd = drive->driver_data;
1608         struct cdrom_device_info *cdi = &cd->devinfo;
1609         u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1610         mechtype_t mechtype;
1611         int nslots = 1;
1612
1613         cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1614                      CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1615                      CDC_MO_DRIVE | CDC_RAM);
1616
1617         if (drive->media == ide_optical) {
1618                 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1619                 printk(KERN_ERR "%s: ATAPI magneto-optical drive\n",
1620                                 drive->name);
1621                 return nslots;
1622         }
1623
1624         if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1625                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1626                 cdi->mask &= ~CDC_PLAY_AUDIO;
1627                 return nslots;
1628         }
1629
1630         /*
1631          * We have to cheat a little here. the packet will eventually be queued
1632          * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1633          * Since this device hasn't been registered with the Uniform layer yet,
1634          * it can't do this. Same goes for cdi->ops.
1635          */
1636         cdi->handle = drive;
1637         cdi->ops = &ide_cdrom_dops;
1638
1639         if (ide_cdrom_get_capabilities(drive, buf))
1640                 return 0;
1641
1642         if ((buf[8 + 6] & 0x01) == 0)
1643                 drive->atapi_flags |= IDE_AFLAG_NO_DOORLOCK;
1644         if (buf[8 + 6] & 0x08)
1645                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1646         if (buf[8 + 3] & 0x01)
1647                 cdi->mask &= ~CDC_CD_R;
1648         if (buf[8 + 3] & 0x02)
1649                 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1650         if (buf[8 + 2] & 0x38)
1651                 cdi->mask &= ~CDC_DVD;
1652         if (buf[8 + 3] & 0x20)
1653                 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1654         if (buf[8 + 3] & 0x10)
1655                 cdi->mask &= ~CDC_DVD_R;
1656         if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1657                 cdi->mask &= ~CDC_PLAY_AUDIO;
1658
1659         mechtype = buf[8 + 6] >> 5;
1660         if (mechtype == mechtype_caddy ||
1661             mechtype == mechtype_popup ||
1662             (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1663                 cdi->mask |= CDC_CLOSE_TRAY;
1664
1665         if (cdi->sanyo_slot > 0) {
1666                 cdi->mask &= ~CDC_SELECT_DISC;
1667                 nslots = 3;
1668         } else if (mechtype == mechtype_individual_changer ||
1669                    mechtype == mechtype_cartridge_changer) {
1670                 nslots = cdrom_number_of_slots(cdi);
1671                 if (nslots > 1)
1672                         cdi->mask &= ~CDC_SELECT_DISC;
1673         }
1674
1675         ide_cdrom_update_speed(drive, buf);
1676
1677         printk(KERN_INFO "%s: ATAPI", drive->name);
1678
1679         /* don't print speed if the drive reported 0 */
1680         if (cd->max_speed)
1681                 printk(KERN_CONT " %dX", cd->max_speed);
1682
1683         printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1684
1685         if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1686                 printk(KERN_CONT " DVD%s%s",
1687                                  (cdi->mask & CDC_DVD_R) ? "" : "-R",
1688                                  (cdi->mask & CDC_DVD_RAM) ? "" : "-RAM");
1689
1690         if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1691                 printk(KERN_CONT " CD%s%s",
1692                                  (cdi->mask & CDC_CD_R) ? "" : "-R",
1693                                  (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1694
1695         if ((cdi->mask & CDC_SELECT_DISC) == 0)
1696                 printk(KERN_CONT " changer w/%d slots", nslots);
1697         else
1698                 printk(KERN_CONT " drive");
1699
1700         printk(KERN_CONT ", %dkB Cache\n", be16_to_cpup((__be16 *)&buf[8 + 12]));
1701
1702         return nslots;
1703 }
1704
1705 /* standard prep_rq_fn that builds 10 byte cmds */
1706 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1707 {
1708         int hard_sect = queue_hardsect_size(q);
1709         long block = (long)rq->hard_sector / (hard_sect >> 9);
1710         unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1711
1712         memset(rq->cmd, 0, BLK_MAX_CDB);
1713
1714         if (rq_data_dir(rq) == READ)
1715                 rq->cmd[0] = GPCMD_READ_10;
1716         else
1717                 rq->cmd[0] = GPCMD_WRITE_10;
1718
1719         /*
1720          * fill in lba
1721          */
1722         rq->cmd[2] = (block >> 24) & 0xff;
1723         rq->cmd[3] = (block >> 16) & 0xff;
1724         rq->cmd[4] = (block >>  8) & 0xff;
1725         rq->cmd[5] = block & 0xff;
1726
1727         /*
1728          * and transfer length
1729          */
1730         rq->cmd[7] = (blocks >> 8) & 0xff;
1731         rq->cmd[8] = blocks & 0xff;
1732         rq->cmd_len = 10;
1733         return BLKPREP_OK;
1734 }
1735
1736 /*
1737  * Most of the SCSI commands are supported directly by ATAPI devices.
1738  * This transform handles the few exceptions.
1739  */
1740 static int ide_cdrom_prep_pc(struct request *rq)
1741 {
1742         u8 *c = rq->cmd;
1743
1744         /* transform 6-byte read/write commands to the 10-byte version */
1745         if (c[0] == READ_6 || c[0] == WRITE_6) {
1746                 c[8] = c[4];
1747                 c[5] = c[3];
1748                 c[4] = c[2];
1749                 c[3] = c[1] & 0x1f;
1750                 c[2] = 0;
1751                 c[1] &= 0xe0;
1752                 c[0] += (READ_10 - READ_6);
1753                 rq->cmd_len = 10;
1754                 return BLKPREP_OK;
1755         }
1756
1757         /*
1758          * it's silly to pretend we understand 6-byte sense commands, just
1759          * reject with ILLEGAL_REQUEST and the caller should take the
1760          * appropriate action
1761          */
1762         if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1763                 rq->errors = ILLEGAL_REQUEST;
1764                 return BLKPREP_KILL;
1765         }
1766
1767         return BLKPREP_OK;
1768 }
1769
1770 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1771 {
1772         if (blk_fs_request(rq))
1773                 return ide_cdrom_prep_fs(q, rq);
1774         else if (blk_pc_request(rq))
1775                 return ide_cdrom_prep_pc(rq);
1776
1777         return 0;
1778 }
1779
1780 struct cd_list_entry {
1781         const char      *id_model;
1782         const char      *id_firmware;
1783         unsigned int    cd_flags;
1784 };
1785
1786 #ifdef CONFIG_IDE_PROC_FS
1787 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1788 {
1789         unsigned long capacity, sectors_per_frame;
1790
1791         if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1792                 return 0;
1793
1794         return capacity * sectors_per_frame;
1795 }
1796
1797 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1798                                         int count, int *eof, void *data)
1799 {
1800         ide_drive_t *drive = data;
1801         int len;
1802
1803         len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1804         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1805 }
1806
1807 static ide_proc_entry_t idecd_proc[] = {
1808         { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1809         { NULL, 0, NULL, NULL }
1810 };
1811
1812 ide_devset_rw(dsc_overlap, 0, 1, dsc_overlap);
1813
1814 static const struct ide_devset *idecd_settings[] = {
1815         &ide_devset_dsc_overlap,
1816         NULL
1817 };
1818 #endif
1819
1820 static const struct cd_list_entry ide_cd_quirks_list[] = {
1821         /* Limit transfer size per interrupt. */
1822         { "SAMSUNG CD-ROM SCR-2430", NULL,   IDE_AFLAG_LIMIT_NFRAMES         },
1823         { "SAMSUNG CD-ROM SCR-2432", NULL,   IDE_AFLAG_LIMIT_NFRAMES         },
1824         /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1825         { "SAMSUNG CD-ROM SCR-3231", NULL,   IDE_AFLAG_NO_SPEED_SELECT       },
1826         /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1827         { "NEC CD-ROM DRIVE:260",    "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1828                                              IDE_AFLAG_PRE_ATAPI12,          },
1829         /* Vertos 300, some versions of this drive like to talk BCD. */
1830         { "V003S0DS",                NULL,   IDE_AFLAG_VERTOS_300_SSD,       },
1831         /* Vertos 600 ESD. */
1832         { "V006E0DS",                NULL,   IDE_AFLAG_VERTOS_600_ESD,       },
1833         /*
1834          * Sanyo 3 CD changer uses a non-standard command for CD changing
1835          * (by default standard ATAPI support for CD changers is used).
1836          */
1837         { "CD-ROM CDR-C3 G",         NULL,   IDE_AFLAG_SANYO_3CD             },
1838         { "CD-ROM CDR-C3G",          NULL,   IDE_AFLAG_SANYO_3CD             },
1839         { "CD-ROM CDR_C36",          NULL,   IDE_AFLAG_SANYO_3CD             },
1840         /* Stingray 8X CD-ROM. */
1841         { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1842         /*
1843          * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1844          * mode sense page capabilities size, but older drives break.
1845          */
1846         { "ATAPI CD ROM DRIVE 50X MAX", NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1847         { "WPI CDS-32X",                NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1848         /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1849         { "",                        "241N", IDE_AFLAG_LE_SPEED_FIELDS       },
1850         /*
1851          * Some drives used by Apple don't advertise audio play
1852          * but they do support reading TOC & audio datas.
1853          */
1854         { "MATSHITADVD-ROM SR-8187", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1855         { "MATSHITADVD-ROM SR-8186", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1856         { "MATSHITADVD-ROM SR-8176", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1857         { "MATSHITADVD-ROM SR-8174", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1858         { "Optiarc DVD RW AD-5200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1859         { "Optiarc DVD RW AD-7200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1860         { "Optiarc DVD RW AD-7543A", NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1861         { NULL, NULL, 0 }
1862 };
1863
1864 static unsigned int ide_cd_flags(u16 *id)
1865 {
1866         const struct cd_list_entry *cle = ide_cd_quirks_list;
1867
1868         while (cle->id_model) {
1869                 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1870                     (cle->id_firmware == NULL ||
1871                      strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1872                         return cle->cd_flags;
1873                 cle++;
1874         }
1875
1876         return 0;
1877 }
1878
1879 static int ide_cdrom_setup(ide_drive_t *drive)
1880 {
1881         struct cdrom_info *cd = drive->driver_data;
1882         struct cdrom_device_info *cdi = &cd->devinfo;
1883         u16 *id = drive->id;
1884         char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1885         int nslots;
1886
1887         blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
1888         blk_queue_dma_alignment(drive->queue, 31);
1889         blk_queue_update_dma_pad(drive->queue, 15);
1890         drive->queue->unplug_delay = (1 * HZ) / 1000;
1891         if (!drive->queue->unplug_delay)
1892                 drive->queue->unplug_delay = 1;
1893
1894         drive->special.all      = 0;
1895
1896         drive->atapi_flags = IDE_AFLAG_MEDIA_CHANGED | IDE_AFLAG_NO_EJECT |
1897                        ide_cd_flags(id);
1898
1899         if ((id[ATA_ID_CONFIG] & 0x0060) == 0x20)
1900                 drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT;
1901
1902         if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1903             fw_rev[4] == '1' && fw_rev[6] <= '2')
1904                 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1905                                      IDE_AFLAG_TOCADDR_AS_BCD);
1906         else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1907                  fw_rev[4] == '1' && fw_rev[6] <= '2')
1908                 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1909         else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1910                 /* 3 => use CD in slot 0 */
1911                 cdi->sanyo_slot = 3;
1912
1913         nslots = ide_cdrom_probe_capabilities(drive);
1914
1915         /* set correct block size */
1916         blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
1917
1918         drive->dsc_overlap = (drive->next != drive);
1919
1920         if (ide_cdrom_register(drive, nslots)) {
1921                 printk(KERN_ERR "%s: %s failed to register device with the"
1922                                 " cdrom driver.\n", drive->name, __func__);
1923                 cd->devinfo.handle = NULL;
1924                 return 1;
1925         }
1926
1927         ide_proc_register_driver(drive, cd->driver);
1928         return 0;
1929 }
1930
1931 static void ide_cd_remove(ide_drive_t *drive)
1932 {
1933         struct cdrom_info *info = drive->driver_data;
1934
1935         ide_proc_unregister_driver(drive, info->driver);
1936
1937         del_gendisk(info->disk);
1938
1939         ide_cd_put(info);
1940 }
1941
1942 static void ide_cd_release(struct kref *kref)
1943 {
1944         struct cdrom_info *info = to_ide_cd(kref);
1945         struct cdrom_device_info *devinfo = &info->devinfo;
1946         ide_drive_t *drive = info->drive;
1947         struct gendisk *g = info->disk;
1948
1949         kfree(info->toc);
1950         if (devinfo->handle == drive)
1951                 unregister_cdrom(devinfo);
1952         drive->dsc_overlap = 0;
1953         drive->driver_data = NULL;
1954         blk_queue_prep_rq(drive->queue, NULL);
1955         g->private_data = NULL;
1956         put_disk(g);
1957         kfree(info);
1958 }
1959
1960 static int ide_cd_probe(ide_drive_t *);
1961
1962 static ide_driver_t ide_cdrom_driver = {
1963         .gen_driver = {
1964                 .owner          = THIS_MODULE,
1965                 .name           = "ide-cdrom",
1966                 .bus            = &ide_bus_type,
1967         },
1968         .probe                  = ide_cd_probe,
1969         .remove                 = ide_cd_remove,
1970         .version                = IDECD_VERSION,
1971         .media                  = ide_cdrom,
1972         .supports_dsc_overlap   = 1,
1973         .do_request             = ide_cd_do_request,
1974         .end_request            = ide_end_request,
1975         .error                  = __ide_error,
1976 #ifdef CONFIG_IDE_PROC_FS
1977         .proc                   = idecd_proc,
1978         .settings               = idecd_settings,
1979 #endif
1980 };
1981
1982 static int idecd_open(struct inode *inode, struct file *file)
1983 {
1984         struct gendisk *disk = inode->i_bdev->bd_disk;
1985         struct cdrom_info *info;
1986         int rc = -ENOMEM;
1987
1988         info = ide_cd_get(disk);
1989         if (!info)
1990                 return -ENXIO;
1991
1992         rc = cdrom_open(&info->devinfo, inode, file);
1993
1994         if (rc < 0)
1995                 ide_cd_put(info);
1996
1997         return rc;
1998 }
1999
2000 static int idecd_release(struct inode *inode, struct file *file)
2001 {
2002         struct gendisk *disk = inode->i_bdev->bd_disk;
2003         struct cdrom_info *info = ide_cd_g(disk);
2004
2005         cdrom_release(&info->devinfo, file);
2006
2007         ide_cd_put(info);
2008
2009         return 0;
2010 }
2011
2012 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
2013 {
2014         struct packet_command cgc;
2015         char buffer[16];
2016         int stat;
2017         char spindown;
2018
2019         if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
2020                 return -EFAULT;
2021
2022         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
2023
2024         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
2025         if (stat)
2026                 return stat;
2027
2028         buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
2029         return cdrom_mode_select(cdi, &cgc);
2030 }
2031
2032 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
2033 {
2034         struct packet_command cgc;
2035         char buffer[16];
2036         int stat;
2037         char spindown;
2038
2039         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
2040
2041         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
2042         if (stat)
2043                 return stat;
2044
2045         spindown = buffer[11] & 0x0f;
2046         if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
2047                 return -EFAULT;
2048         return 0;
2049 }
2050
2051 static int idecd_ioctl(struct inode *inode, struct file *file,
2052                         unsigned int cmd, unsigned long arg)
2053 {
2054         struct block_device *bdev = inode->i_bdev;
2055         struct cdrom_info *info = ide_cd_g(bdev->bd_disk);
2056         int err;
2057
2058         switch (cmd) {
2059         case CDROMSETSPINDOWN:
2060                 return idecd_set_spindown(&info->devinfo, arg);
2061         case CDROMGETSPINDOWN:
2062                 return idecd_get_spindown(&info->devinfo, arg);
2063         default:
2064                 break;
2065         }
2066
2067         err = generic_ide_ioctl(info->drive, file, bdev, cmd, arg);
2068         if (err == -EINVAL)
2069                 err = cdrom_ioctl(file, &info->devinfo, inode, cmd, arg);
2070
2071         return err;
2072 }
2073
2074 static int idecd_media_changed(struct gendisk *disk)
2075 {
2076         struct cdrom_info *info = ide_cd_g(disk);
2077         return cdrom_media_changed(&info->devinfo);
2078 }
2079
2080 static int idecd_revalidate_disk(struct gendisk *disk)
2081 {
2082         struct cdrom_info *info = ide_cd_g(disk);
2083         struct request_sense sense;
2084
2085         ide_cd_read_toc(info->drive, &sense);
2086
2087         return  0;
2088 }
2089
2090 static struct block_device_operations idecd_ops = {
2091         .owner                  = THIS_MODULE,
2092         .open                   = idecd_open,
2093         .release                = idecd_release,
2094         .ioctl                  = idecd_ioctl,
2095         .media_changed          = idecd_media_changed,
2096         .revalidate_disk        = idecd_revalidate_disk
2097 };
2098
2099 /* module options */
2100 static char *ignore;
2101
2102 module_param(ignore, charp, 0400);
2103 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
2104
2105 static int ide_cd_probe(ide_drive_t *drive)
2106 {
2107         struct cdrom_info *info;
2108         struct gendisk *g;
2109         struct request_sense sense;
2110
2111         if (!strstr("ide-cdrom", drive->driver_req))
2112                 goto failed;
2113
2114         if (drive->media != ide_cdrom && drive->media != ide_optical)
2115                 goto failed;
2116
2117         /* skip drives that we were told to ignore */
2118         if (ignore != NULL) {
2119                 if (strstr(ignore, drive->name)) {
2120                         printk(KERN_INFO "ide-cd: ignoring drive %s\n",
2121                                          drive->name);
2122                         goto failed;
2123                 }
2124         }
2125         info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
2126         if (info == NULL) {
2127                 printk(KERN_ERR "%s: Can't allocate a cdrom structure\n",
2128                                 drive->name);
2129                 goto failed;
2130         }
2131
2132         g = alloc_disk(1 << PARTN_BITS);
2133         if (!g)
2134                 goto out_free_cd;
2135
2136         ide_init_disk(g, drive);
2137
2138         kref_init(&info->kref);
2139
2140         info->drive = drive;
2141         info->driver = &ide_cdrom_driver;
2142         info->disk = g;
2143
2144         g->private_data = &info->driver;
2145
2146         drive->driver_data = info;
2147
2148         g->minors = 1;
2149         g->driverfs_dev = &drive->gendev;
2150         g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
2151         if (ide_cdrom_setup(drive)) {
2152                 ide_cd_release(&info->kref);
2153                 goto failed;
2154         }
2155
2156         ide_cd_read_toc(drive, &sense);
2157         g->fops = &idecd_ops;
2158         g->flags |= GENHD_FL_REMOVABLE;
2159         add_disk(g);
2160         return 0;
2161
2162 out_free_cd:
2163         kfree(info);
2164 failed:
2165         return -ENODEV;
2166 }
2167
2168 static void __exit ide_cdrom_exit(void)
2169 {
2170         driver_unregister(&ide_cdrom_driver.gen_driver);
2171 }
2172
2173 static int __init ide_cdrom_init(void)
2174 {
2175         return driver_register(&ide_cdrom_driver.gen_driver);
2176 }
2177
2178 MODULE_ALIAS("ide:*m-cdrom*");
2179 MODULE_ALIAS("ide-cd");
2180 module_init(ide_cdrom_init);
2181 module_exit(ide_cdrom_exit);
2182 MODULE_LICENSE("GPL");