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 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 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_cd_g(disk);
  66         if (cd)
  67                 kref_get(&cd->kref);
  68         mutex_unlock(&idecd_ref_mutex);
  69         return cd;
  70 }
  71
  72 static void ide_cd_release(struct kref *);
  73
  74 static void ide_cd_put(struct cdrom_info *cd)
  75 {
  76         mutex_lock(&idecd_ref_mutex);
  77         kref_put(&cd->kref, ide_cd_release);
  78         mutex_unlock(&idecd_ref_mutex);
  79 }
  80
  81 /*
  82  * Generic packet command support and error handling routines.
  83  */
  84
  85 /* Mark that we've seen a media change and invalidate our internal buffers. */
  86 static void cdrom_saw_media_change(ide_drive_t *drive)
  87 {
  88         drive->atapi_flags |= IDE_AFLAG_MEDIA_CHANGED;
  89         drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
  90 }
  91
  92 static int cdrom_log_sense(ide_drive_t *drive, struct request *rq,
  93                            struct request_sense *sense)
  94 {
  95         int log = 0;
  96
  97         if (!sense || !rq || (rq->cmd_flags & REQ_QUIET))
  98                 return 0;
  99
 100         switch (sense->sense_key) {
 101         case NO_SENSE:
 102         case RECOVERED_ERROR:
 103                 break;
 104         case NOT_READY:
 105                 /*
 106                  * don't care about tray state messages for e.g. capacity
 107                  * commands or in-progress or becoming ready
 108                  */
 109                 if (sense->asc == 0x3a || sense->asc == 0x04)
 110                         break;
 111                 log = 1;
 112                 break;
 113         case ILLEGAL_REQUEST:
 114                 /*
 115                  * don't log START_STOP unit with LoEj set, since we cannot
 116                  * reliably check if drive can auto-close
 117                  */
 118                 if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
 119                         break;
 120                 log = 1;
 121                 break;
 122         case UNIT_ATTENTION:
 123                 /*
 124                  * Make good and sure we've seen this potential media change.
 125                  * Some drives (i.e. Creative) fail to present the correct sense
 126                  * key in the error register.
 127                  */
 128                 cdrom_saw_media_change(drive);
 129                 break;
 130         default:
 131                 log = 1;
 132                 break;
 133         }
 134         return log;
 135 }
 136
 137 static void cdrom_analyze_sense_data(ide_drive_t *drive,
 138                               struct request *failed_command,
 139                               struct request_sense *sense)
 140 {
 141         unsigned long sector;
 142         unsigned long bio_sectors;
 143         struct cdrom_info *info = drive->driver_data;
 144
 145         if (!cdrom_log_sense(drive, failed_command, sense))
 146                 return;
 147
 148         /*
 149          * If a read toc is executed for a CD-R or CD-RW medium where the first
 150          * toc has not been recorded yet, it will fail with 05/24/00 (which is a
 151          * confusing error)
 152          */
 153         if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
 154                 if (sense->sense_key == 0x05 && sense->asc == 0x24)
 155                         return;
 156
 157         /* current error */
 158         if (sense->error_code == 0x70) {
 159                 switch (sense->sense_key) {
 160                 case MEDIUM_ERROR:
 161                 case VOLUME_OVERFLOW:
 162                 case ILLEGAL_REQUEST:
 163                         if (!sense->valid)
 164                                 break;
 165                         if (failed_command == NULL ||
 166                                         !blk_fs_request(failed_command))
 167                                 break;
 168                         sector = (sense->information[0] << 24) |
 169                                  (sense->information[1] << 16) |
 170                                  (sense->information[2] <<  8) |
 171                                  (sense->information[3]);
 172
 173                         if (drive->queue->hardsect_size == 2048)
 174                                 /* device sector size is 2K */
 175                                 sector <<= 2;
 176
 177                         bio_sectors = max(bio_sectors(failed_command->bio), 4U);
 178                         sector &= ~(bio_sectors - 1);
 179
 180                         if (sector < get_capacity(info->disk) &&
 181                             drive->probed_capacity - sector < 4 * 75)
 182                                 set_capacity(info->disk, sector);
 183                 }
 184         }
 185
 186         ide_cd_log_error(drive->name, failed_command, sense);
 187 }
 188
 189 static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense,
 190                                       struct request *failed_command)
 191 {
 192         struct cdrom_info *info         = drive->driver_data;
 193         struct request *rq              = &info->request_sense_request;
 194
 195         if (sense == NULL)
 196                 sense = &info->sense_data;
 197
 198         /* stuff the sense request in front of our current request */
 199         blk_rq_init(NULL, rq);
 200         rq->cmd_type = REQ_TYPE_ATA_PC;
 201         rq->rq_disk = info->disk;
 202
 203         rq->data = sense;
 204         rq->cmd[0] = GPCMD_REQUEST_SENSE;
 205         rq->cmd[4] = 18;
 206         rq->data_len = 18;
 207
 208         rq->cmd_type = REQ_TYPE_SENSE;
 209         rq->cmd_flags |= REQ_PREEMPT;
 210
 211         /* NOTE! Save the failed command in "rq->buffer" */
 212         rq->buffer = (void *) failed_command;
 213
 214         ide_do_drive_cmd(drive, rq);
 215 }
 216
 217 static void cdrom_end_request(ide_drive_t *drive, int uptodate)
 218 {
 219         struct request *rq = HWGROUP(drive)->rq;
 220         int nsectors = rq->hard_cur_sectors;
 221
 222         if (blk_sense_request(rq) && uptodate) {
 223                 /*
 224                  * For REQ_TYPE_SENSE, "rq->buffer" points to the original
 225                  * failed request
 226                  */
 227                 struct request *failed = (struct request *) rq->buffer;
 228                 struct cdrom_info *info = drive->driver_data;
 229                 void *sense = &info->sense_data;
 230                 unsigned long flags;
 231
 232                 if (failed) {
 233                         if (failed->sense) {
 234                                 sense = failed->sense;
 235                                 failed->sense_len = rq->sense_len;
 236                         }
 237                         cdrom_analyze_sense_data(drive, failed, sense);
 238                         /*
 239                          * now end the failed request
 240                          */
 241                         if (blk_fs_request(failed)) {
 242                                 if (ide_end_dequeued_request(drive, failed, 0,
 243                                                 failed->hard_nr_sectors))
 244                                         BUG();
 245                         } else {
 246                                 spin_lock_irqsave(&ide_lock, flags);
 247                                 if (__blk_end_request(failed, -EIO,
 248                                                       failed->data_len))
 249                                         BUG();
 250                                 spin_unlock_irqrestore(&ide_lock, flags);
 251                         }
 252                 } else
 253                         cdrom_analyze_sense_data(drive, NULL, sense);
 254         }
 255
 256         if (!rq->current_nr_sectors && blk_fs_request(rq))
 257                 uptodate = 1;
 258         /* make sure it's fully ended */
 259         if (blk_pc_request(rq))
 260                 nsectors = (rq->data_len + 511) >> 9;
 261         if (!nsectors)
 262                 nsectors = 1;
 263
 264         ide_end_request(drive, uptodate, nsectors);
 265 }
 266
 267 static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 st)
 268 {
 269         if (st & 0x80)
 270                 return;
 271         ide_dump_status(drive, msg, st);
 272 }
 273
 274 /*
 275  * Returns:
 276  * 0: if the request should be continued.
 277  * 1: if the request was ended.
 278  */
 279 static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
 280 {
 281         ide_hwif_t *hwif = drive->hwif;
 282         struct request *rq = hwif->hwgroup->rq;
 283         int stat, err, sense_key;
 284
 285         /* check for errors */
 286         stat = hwif->tp_ops->read_status(hwif);
 287
 288         if (stat_ret)
 289                 *stat_ret = stat;
 290
 291         if (OK_STAT(stat, good_stat, BAD_R_STAT))
 292                 return 0;
 293
 294         /* get the IDE error register */
 295         err = ide_read_error(drive);
 296         sense_key = err >> 4;
 297
 298         if (rq == NULL) {
 299                 printk(KERN_ERR "%s: missing rq in %s\n",
 300                                 drive->name, __func__);
 301                 return 1;
 302         }
 303
 304         if (blk_sense_request(rq)) {
 305                 /*
 306                  * We got an error trying to get sense info from the drive
 307                  * (probably while trying to recover from a former error).
 308                  * Just give up.
 309                  */
 310                 rq->cmd_flags |= REQ_FAILED;
 311                 cdrom_end_request(drive, 0);
 312                 ide_error(drive, "request sense failure", stat);
 313                 return 1;
 314
 315         } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) {
 316                 /* All other functions, except for READ. */
 317
 318                 /*
 319                  * if we have an error, pass back CHECK_CONDITION as the
 320                  * scsi status byte
 321                  */
 322                 if (blk_pc_request(rq) && !rq->errors)
 323                         rq->errors = SAM_STAT_CHECK_CONDITION;
 324
 325                 /* check for tray open */
 326                 if (sense_key == NOT_READY) {
 327                         cdrom_saw_media_change(drive);
 328                 } else if (sense_key == UNIT_ATTENTION) {
 329                         /* check for media change */
 330                         cdrom_saw_media_change(drive);
 331                         return 0;
 332                 } else if (sense_key == ILLEGAL_REQUEST &&
 333                            rq->cmd[0] == GPCMD_START_STOP_UNIT) {
 334                         /*
 335                          * Don't print error message for this condition--
 336                          * SFF8090i indicates that 5/24/00 is the correct
 337                          * response to a request to close the tray if the
 338                          * drive doesn't have that capability.
 339                          * cdrom_log_sense() knows this!
 340                          */
 341                 } else if (!(rq->cmd_flags & REQ_QUIET)) {
 342                         /* otherwise, print an error */
 343                         ide_dump_status(drive, "packet command error", stat);
 344                 }
 345
 346                 rq->cmd_flags |= REQ_FAILED;
 347
 348                 /*
 349                  * instead of playing games with moving completions around,
 350                  * remove failed request completely and end it when the
 351                  * request sense has completed
 352                  */
 353                 goto end_request;
 354
 355         } else if (blk_fs_request(rq)) {
 356                 int do_end_request = 0;
 357
 358                 /* handle errors from READ and WRITE requests */
 359
 360                 if (blk_noretry_request(rq))
 361                         do_end_request = 1;
 362
 363                 if (sense_key == NOT_READY) {
 364                         /* tray open */
 365                         if (rq_data_dir(rq) == READ) {
 366                                 cdrom_saw_media_change(drive);
 367
 368                                 /* fail the request */
 369                                 printk(KERN_ERR "%s: tray open\n", drive->name);
 370                                 do_end_request = 1;
 371                         } else {
 372                                 struct cdrom_info *info = drive->driver_data;
 373
 374                                 /*
 375                                  * Allow the drive 5 seconds to recover, some
 376                                  * devices will return this error while flushing
 377                                  * data from cache.
 378                                  */
 379                                 if (!rq->errors)
 380                                         info->write_timeout = jiffies +
 381                                                         ATAPI_WAIT_WRITE_BUSY;
 382                                 rq->errors = 1;
 383                                 if (time_after(jiffies, info->write_timeout))
 384                                         do_end_request = 1;
 385                                 else {
 386                                         unsigned long flags;
 387
 388                                         /*
 389                                          * take a breather relying on the unplug
 390                                          * timer to kick us again
 391                                          */
 392                                         spin_lock_irqsave(&ide_lock, flags);
 393                                         blk_plug_device(drive->queue);
 394                                         spin_unlock_irqrestore(&ide_lock,
 395                                                                 flags);
 396                                         return 1;
 397                                 }
 398                         }
 399                 } else if (sense_key == UNIT_ATTENTION) {
 400                         /* media change */
 401                         cdrom_saw_media_change(drive);
 402
 403                         /*
 404                          * Arrange to retry the request but be sure to give up
 405                          * if we've retried too many times.
 406                          */
 407                         if (++rq->errors > ERROR_MAX)
 408                                 do_end_request = 1;
 409                 } else if (sense_key == ILLEGAL_REQUEST ||
 410                            sense_key == DATA_PROTECT) {
 411                         /*
 412                          * No point in retrying after an illegal request or data
 413                          * protect error.
 414                          */
 415                         ide_dump_status_no_sense(drive, "command error", stat);
 416                         do_end_request = 1;
 417                 } else if (sense_key == MEDIUM_ERROR) {
 418                         /*
 419                          * No point in re-trying a zillion times on a bad
 420                          * sector. If we got here the error is not correctable.
 421                          */
 422                         ide_dump_status_no_sense(drive,
 423                                                  "media error (bad sector)",
 424                                                  stat);
 425                         do_end_request = 1;
 426                 } else if (sense_key == BLANK_CHECK) {
 427                         /* disk appears blank ?? */
 428                         ide_dump_status_no_sense(drive, "media error (blank)",
 429                                                  stat);
 430                         do_end_request = 1;
 431                 } else if ((err & ~ABRT_ERR) != 0) {
 432                         /* go to the default handler for other errors */
 433                         ide_error(drive, "cdrom_decode_status", stat);
 434                         return 1;
 435                 } else if ((++rq->errors > ERROR_MAX)) {
 436                         /* we've racked up too many retries, abort */
 437                         do_end_request = 1;
 438                 }
 439
 440                 /*
 441                  * End a request through request sense analysis when we have
 442                  * sense data. We need this in order to perform end of media
 443                  * processing.
 444                  */
 445                 if (do_end_request)
 446                         goto end_request;
 447
 448                 /*
 449                  * If we got a CHECK_CONDITION status, queue
 450                  * a request sense command.
 451                  */
 452                 if (stat & ERR_STAT)
 453                         cdrom_queue_request_sense(drive, NULL, NULL);
 454         } else {
 455                 blk_dump_rq_flags(rq, "ide-cd: bad rq");
 456                 cdrom_end_request(drive, 0);
 457         }
 458
 459         /* retry, or handle the next request */
 460         return 1;
 461
 462 end_request:
 463         if (stat & ERR_STAT) {
 464                 unsigned long flags;
 465
 466                 spin_lock_irqsave(&ide_lock, flags);
 467                 blkdev_dequeue_request(rq);
 468                 HWGROUP(drive)->rq = NULL;
 469                 spin_unlock_irqrestore(&ide_lock, flags);
 470
 471                 cdrom_queue_request_sense(drive, rq->sense, rq);
 472         } else
 473                 cdrom_end_request(drive, 0);
 474
 475         return 1;
 476 }
 477
 478 static int cdrom_timer_expiry(ide_drive_t *drive)
 479 {
 480         struct request *rq = HWGROUP(drive)->rq;
 481         unsigned long wait = 0;
 482
 483         /*
 484          * Some commands are *slow* and normally take a long time to complete.
 485          * Usually we can use the ATAPI "disconnect" to bypass this, but not all
 486          * commands/drives support that. Let ide_timer_expiry keep polling us
 487          * for these.
 488          */
 489         switch (rq->cmd[0]) {
 490         case GPCMD_BLANK:
 491         case GPCMD_FORMAT_UNIT:
 492         case GPCMD_RESERVE_RZONE_TRACK:
 493         case GPCMD_CLOSE_TRACK:
 494         case GPCMD_FLUSH_CACHE:
 495                 wait = ATAPI_WAIT_PC;
 496                 break;
 497         default:
 498                 if (!(rq->cmd_flags & REQ_QUIET))
 499                         printk(KERN_INFO "ide-cd: cmd 0x%x timed out\n",
 500                                          rq->cmd[0]);
 501                 wait = 0;
 502                 break;
 503         }
 504         return wait;
 505 }
 506
 507 /*
 508  * Set up the device registers for transferring a packet command on DEV,
 509  * expecting to later transfer XFERLEN bytes.  HANDLER is the routine
 510  * which actually transfers the command to the drive.  If this is a
 511  * drq_interrupt device, this routine will arrange for HANDLER to be
 512  * called when the interrupt from the drive arrives.  Otherwise, HANDLER
 513  * will be called immediately after the drive is prepared for the transfer.
 514  */
 515 static ide_startstop_t cdrom_start_packet_command(ide_drive_t *drive,
 516                                                   int xferlen,
 517                                                   ide_handler_t *handler)
 518 {
 519         struct cdrom_info *info = drive->driver_data;
 520         ide_hwif_t *hwif = drive->hwif;
 521
 522         /* FIXME: for Virtual DMA we must check harder */
 523         if (info->dma)
 524                 info->dma = !hwif->dma_ops->dma_setup(drive);
 525
 526         /* set up the controller registers */
 527         ide_pktcmd_tf_load(drive, IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL,
 528                            xferlen, info->dma);
 529
 530         if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
 531                 /* waiting for CDB interrupt, not DMA yet. */
 532                 if (info->dma)
 533                         drive->waiting_for_dma = 0;
 534
 535                 /* packet command */
 536                 ide_execute_command(drive, WIN_PACKETCMD, handler,
 537                                     ATAPI_WAIT_PC, cdrom_timer_expiry);
 538                 return ide_started;
 539         } else {
 540                 ide_execute_pkt_cmd(drive);
 541
 542                 return (*handler) (drive);
 543         }
 544 }
 545
 546 /*
 547  * Send a packet command to DRIVE described by CMD_BUF and CMD_LEN. The device
 548  * registers must have already been prepared by cdrom_start_packet_command.
 549  * HANDLER is the interrupt handler to call when the command completes or
 550  * there's data ready.
 551  */
 552 #define ATAPI_MIN_CDB_BYTES 12
 553 static ide_startstop_t cdrom_transfer_packet_command(ide_drive_t *drive,
 554                                           struct request *rq,
 555                                           ide_handler_t *handler)
 556 {
 557         ide_hwif_t *hwif = drive->hwif;
 558         int cmd_len;
 559         struct cdrom_info *info = drive->driver_data;
 560         ide_startstop_t startstop;
 561
 562         if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
 563                 /*
 564                  * Here we should have been called after receiving an interrupt
 565                  * from the device.  DRQ should how be set.
 566                  */
 567
 568                 /* check for errors */
 569                 if (cdrom_decode_status(drive, DRQ_STAT, NULL))
 570                         return ide_stopped;
 571
 572                 /* ok, next interrupt will be DMA interrupt */
 573                 if (info->dma)
 574                         drive->waiting_for_dma = 1;
 575         } else {
 576                 /* otherwise, we must wait for DRQ to get set */
 577                 if (ide_wait_stat(&startstop, drive, DRQ_STAT,
 578                                 BUSY_STAT, WAIT_READY))
 579                         return startstop;
 580         }
 581
 582         /* arm the interrupt handler */
 583         ide_set_handler(drive, handler, rq->timeout, cdrom_timer_expiry);
 584
 585         /* ATAPI commands get padded out to 12 bytes minimum */
 586         cmd_len = COMMAND_SIZE(rq->cmd[0]);
 587         if (cmd_len < ATAPI_MIN_CDB_BYTES)
 588                 cmd_len = ATAPI_MIN_CDB_BYTES;
 589
 590         /* send the command to the device */
 591         hwif->tp_ops->output_data(drive, NULL, rq->cmd, cmd_len);
 592
 593         /* start the DMA if need be */
 594         if (info->dma)
 595                 hwif->dma_ops->dma_start(drive);
 596
 597         return ide_started;
 598 }
 599
 600 /*
 601  * Check the contents of the interrupt reason register from the cdrom
 602  * and attempt to recover if there are problems.  Returns  0 if everything's
 603  * ok; nonzero if the request has been terminated.
 604  */
 605 static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
 606                                 int len, int ireason, int rw)
 607 {
 608         ide_hwif_t *hwif = drive->hwif;
 609
 610         /*
 611          * ireason == 0: the drive wants to receive data from us
 612          * ireason == 2: the drive is expecting to transfer data to us
 613          */
 614         if (ireason == (!rw << 1))
 615                 return 0;
 616         else if (ireason == (rw << 1)) {
 617
 618                 /* whoops... */
 619                 printk(KERN_ERR "%s: %s: wrong transfer direction!\n",
 620                                 drive->name, __func__);
 621
 622                 ide_pad_transfer(drive, rw, len);
 623         } else  if (rw == 0 && ireason == 1) {
 624                 /*
 625                  * Some drives (ASUS) seem to tell us that status info is
 626                  * available.  Just get it and ignore.
 627                  */
 628                 (void)hwif->tp_ops->read_status(hwif);
 629                 return 0;
 630         } else {
 631                 /* drive wants a command packet, or invalid ireason... */
 632                 printk(KERN_ERR "%s: %s: bad interrupt reason 0x%02x\n",
 633                                 drive->name, __func__, ireason);
 634         }
 635
 636         if (rq->cmd_type == REQ_TYPE_ATA_PC)
 637                 rq->cmd_flags |= REQ_FAILED;
 638
 639         cdrom_end_request(drive, 0);
 640         return -1;
 641 }
 642
 643 /*
 644  * Assume that the drive will always provide data in multiples of at least
 645  * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise.
 646  */
 647 static int ide_cd_check_transfer_size(ide_drive_t *drive, int len)
 648 {
 649         if ((len % SECTOR_SIZE) == 0)
 650                 return 0;
 651
 652         printk(KERN_ERR "%s: %s: Bad transfer size %d\n",
 653                         drive->name, __func__, len);
 654
 655         if (drive->atapi_flags & IDE_AFLAG_LIMIT_NFRAMES)
 656                 printk(KERN_ERR "  This drive is not supported by "
 657                                 "this version of the driver\n");
 658         else {
 659                 printk(KERN_ERR "  Trying to limit transfer sizes\n");
 660                 drive->atapi_flags |= IDE_AFLAG_LIMIT_NFRAMES;
 661         }
 662
 663         return 1;
 664 }
 665
 666 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *);
 667
 668 static ide_startstop_t ide_cd_prepare_rw_request(ide_drive_t *drive,
 669                                                  struct request *rq)
 670 {
 671         if (rq_data_dir(rq) == READ) {
 672                 unsigned short sectors_per_frame =
 673                         queue_hardsect_size(drive->queue) >> SECTOR_BITS;
 674                 int nskip = rq->sector & (sectors_per_frame - 1);
 675
 676                 /*
 677                  * If the requested sector doesn't start on a frame boundary,
 678                  * we must adjust the start of the transfer so that it does,
 679                  * and remember to skip the first few sectors.
 680                  *
 681                  * If the rq->current_nr_sectors field is larger than the size
 682                  * of the buffer, it will mean that we're to skip a number of
 683                  * sectors equal to the amount by which rq->current_nr_sectors
 684                  * is larger than the buffer size.
 685                  */
 686                 if (nskip > 0) {
 687                         /* sanity check... */
 688                         if (rq->current_nr_sectors !=
 689                             bio_cur_sectors(rq->bio)) {
 690                                 printk(KERN_ERR "%s: %s: buffer botch (%u)\n",
 691                                                 drive->name, __func__,
 692                                                 rq->current_nr_sectors);
 693                                 cdrom_end_request(drive, 0);
 694                                 return ide_stopped;
 695                         }
 696                         rq->current_nr_sectors += nskip;
 697                 }
 698         }
 699 #if 0
 700         else
 701                 /* the immediate bit */
 702                 rq->cmd[1] = 1 << 3;
 703 #endif
 704         /* set up the command */
 705         rq->timeout = ATAPI_WAIT_PC;
 706
 707         return ide_started;
 708 }
 709
 710 /*
 711  * Routine to send a read/write packet command to the drive. This is usually
 712  * called directly from cdrom_start_{read,write}(). However, for drq_interrupt
 713  * devices, it is called from an interrupt when the drive is ready to accept
 714  * the command.
 715  */
 716 static ide_startstop_t cdrom_start_rw_cont(ide_drive_t *drive)
 717 {
 718         struct request *rq = drive->hwif->hwgroup->rq;
 719
 720         /* send the command to the drive and return */
 721         return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
 722 }
 723
 724 #define IDECD_SEEK_THRESHOLD    (1000)                  /* 1000 blocks */
 725 #define IDECD_SEEK_TIMER        (5 * WAIT_MIN_SLEEP)    /* 100 ms */
 726 #define IDECD_SEEK_TIMEOUT      (2 * WAIT_CMD)          /* 20 sec */
 727
 728 static ide_startstop_t cdrom_seek_intr(ide_drive_t *drive)
 729 {
 730         struct cdrom_info *info = drive->driver_data;
 731         int stat;
 732         static int retry = 10;
 733
 734         if (cdrom_decode_status(drive, 0, &stat))
 735                 return ide_stopped;
 736
 737         drive->atapi_flags |= IDE_AFLAG_SEEKING;
 738
 739         if (retry && time_after(jiffies, info->start_seek + IDECD_SEEK_TIMER)) {
 740                 if (--retry == 0)
 741                         drive->dsc_overlap = 0;
 742         }
 743         return ide_stopped;
 744 }
 745
 746 static void ide_cd_prepare_seek_request(ide_drive_t *drive, struct request *rq)
 747 {
 748         sector_t frame = rq->sector;
 749
 750         sector_div(frame, queue_hardsect_size(drive->queue) >> SECTOR_BITS);
 751
 752         memset(rq->cmd, 0, BLK_MAX_CDB);
 753         rq->cmd[0] = GPCMD_SEEK;
 754         put_unaligned(cpu_to_be32(frame), (unsigned int *) &rq->cmd[2]);
 755
 756         rq->timeout = ATAPI_WAIT_PC;
 757 }
 758
 759 static ide_startstop_t cdrom_start_seek_continuation(ide_drive_t *drive)
 760 {
 761         struct request *rq = drive->hwif->hwgroup->rq;
 762
 763         return cdrom_transfer_packet_command(drive, rq, &cdrom_seek_intr);
 764 }
 765
 766 /*
 767  * Fix up a possibly partially-processed request so that we can start it over
 768  * entirely, or even put it back on the request queue.
 769  */
 770 static void restore_request(struct request *rq)
 771 {
 772         if (rq->buffer != bio_data(rq->bio)) {
 773                 sector_t n =
 774                         (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE;
 775
 776                 rq->buffer = bio_data(rq->bio);
 777                 rq->nr_sectors += n;
 778                 rq->sector -= n;
 779         }
 780         rq->current_nr_sectors = bio_cur_sectors(rq->bio);
 781         rq->hard_cur_sectors = rq->current_nr_sectors;
 782         rq->hard_nr_sectors = rq->nr_sectors;
 783         rq->hard_sector = rq->sector;
 784         rq->q->prep_rq_fn(rq->q, rq);
 785 }
 786
 787 /*
 788  * All other packet commands.
 789  */
 790 static void ide_cd_request_sense_fixup(struct request *rq)
 791 {
 792         /*
 793          * Some of the trailing request sense fields are optional,
 794          * and some drives don't send them.  Sigh.
 795          */
 796         if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
 797             rq->data_len > 0 && rq->data_len <= 5)
 798                 while (rq->data_len > 0) {
 799                         *(u8 *)rq->data++ = 0;
 800                         --rq->data_len;
 801                 }
 802 }
 803
 804 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
 805                     int write, void *buffer, unsigned *bufflen,
 806                     struct request_sense *sense, int timeout,
 807                     unsigned int cmd_flags)
 808 {
 809         struct cdrom_info *info = drive->driver_data;
 810         struct request_sense local_sense;
 811         int retries = 10;
 812         unsigned int flags = 0;
 813
 814         if (!sense)
 815                 sense = &local_sense;
 816
 817         /* start of retry loop */
 818         do {
 819                 struct request *rq;
 820                 int error;
 821
 822                 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
 823
 824                 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
 825                 rq->cmd_type = REQ_TYPE_ATA_PC;
 826                 rq->sense = sense;
 827                 rq->cmd_flags |= cmd_flags;
 828                 rq->timeout = timeout;
 829                 if (buffer) {
 830                         rq->data = buffer;
 831                         rq->data_len = *bufflen;
 832                 }
 833
 834                 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
 835
 836                 if (buffer)
 837                         *bufflen = rq->data_len;
 838
 839                 flags = rq->cmd_flags;
 840                 blk_put_request(rq);
 841
 842                 /*
 843                  * FIXME: we should probably abort/retry or something in case of
 844                  * failure.
 845                  */
 846                 if (flags & REQ_FAILED) {
 847                         /*
 848                          * The request failed.  Retry if it was due to a unit
 849                          * attention status (usually means media was changed).
 850                          */
 851                         struct request_sense *reqbuf = sense;
 852
 853                         if (reqbuf->sense_key == UNIT_ATTENTION)
 854                                 cdrom_saw_media_change(drive);
 855                         else if (reqbuf->sense_key == NOT_READY &&
 856                                  reqbuf->asc == 4 && reqbuf->ascq != 4) {
 857                                 /*
 858                                  * The drive is in the process of loading
 859                                  * a disk.  Retry, but wait a little to give
 860                                  * the drive time to complete the load.
 861                                  */
 862                                 ssleep(2);
 863                         } else {
 864                                 /* otherwise, don't retry */
 865                                 retries = 0;
 866                         }
 867                         --retries;
 868                 }
 869
 870                 /* end of retry loop */
 871         } while ((flags & REQ_FAILED) && retries >= 0);
 872
 873         /* return an error if the command failed */
 874         return (flags & REQ_FAILED) ? -EIO : 0;
 875 }
 876
 877 /*
 878  * Called from blk_end_request_callback() after the data of the request is
 879  * completed and before the request itself is completed. By returning value '1',
 880  * blk_end_request_callback() returns immediately without completing it.
 881  */
 882 static int cdrom_newpc_intr_dummy_cb(struct request *rq)
 883 {
 884         return 1;
 885 }
 886
 887 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 888 {
 889         ide_hwif_t *hwif = drive->hwif;
 890         struct cdrom_info *info = drive->driver_data;
 891         struct request *rq = HWGROUP(drive)->rq;
 892         xfer_func_t *xferfunc;
 893         ide_expiry_t *expiry = NULL;
 894         int dma_error = 0, dma, stat, thislen, uptodate = 0;
 895         int write = (rq_data_dir(rq) == WRITE) ? 1 : 0;
 896         unsigned int timeout;
 897         u16 len;
 898         u8 ireason;
 899
 900         /* check for errors */
 901         dma = info->dma;
 902         if (dma) {
 903                 info->dma = 0;
 904                 dma_error = hwif->dma_ops->dma_end(drive);
 905                 if (dma_error) {
 906                         printk(KERN_ERR "%s: DMA %s error\n", drive->name,
 907                                         write ? "write" : "read");
 908                         ide_dma_off(drive);
 909                 }
 910         }
 911
 912         if (cdrom_decode_status(drive, 0, &stat))
 913                 return ide_stopped;
 914
 915         /* using dma, transfer is complete now */
 916         if (dma) {
 917                 if (dma_error)
 918                         return ide_error(drive, "dma error", stat);
 919                 if (blk_fs_request(rq)) {
 920                         ide_end_request(drive, 1, rq->nr_sectors);
 921                         return ide_stopped;
 922                 }
 923                 goto end_request;
 924         }
 925
 926         ide_read_bcount_and_ireason(drive, &len, &ireason);
 927
 928         thislen = blk_fs_request(rq) ? len : rq->data_len;
 929         if (thislen > len)
 930                 thislen = len;
 931
 932         /* If DRQ is clear, the command has completed. */
 933         if ((stat & DRQ_STAT) == 0) {
 934                 if (blk_fs_request(rq)) {
 935                         /*
 936                          * If we're not done reading/writing, complain.
 937                          * Otherwise, complete the command normally.
 938                          */
 939                         uptodate = 1;
 940                         if (rq->current_nr_sectors > 0) {
 941                                 printk(KERN_ERR "%s: %s: data underrun "
 942                                                 "(%d blocks)\n",
 943                                                 drive->name, __func__,
 944                                                 rq->current_nr_sectors);
 945                                 if (!write)
 946                                         rq->cmd_flags |= REQ_FAILED;
 947                                 uptodate = 0;
 948                         }
 949                         cdrom_end_request(drive, uptodate);
 950                         return ide_stopped;
 951                 } else if (!blk_pc_request(rq)) {
 952                         ide_cd_request_sense_fixup(rq);
 953                         /* complain if we still have data left to transfer */
 954                         uptodate = rq->data_len ? 0 : 1;
 955                 }
 956                 goto end_request;
 957         }
 958
 959         /* check which way to transfer data */
 960         if (ide_cd_check_ireason(drive, rq, len, ireason, write))
 961                 return ide_stopped;
 962
 963         if (blk_fs_request(rq)) {
 964                 if (write == 0) {
 965                         int nskip;
 966
 967                         if (ide_cd_check_transfer_size(drive, len)) {
 968                                 cdrom_end_request(drive, 0);
 969                                 return ide_stopped;
 970                         }
 971
 972                         /*
 973                          * First, figure out if we need to bit-bucket
 974                          * any of the leading sectors.
 975                          */
 976                         nskip = min_t(int, rq->current_nr_sectors
 977                                            - bio_cur_sectors(rq->bio),
 978                                            thislen >> 9);
 979                         if (nskip > 0) {
 980                                 ide_pad_transfer(drive, write, nskip << 9);
 981                                 rq->current_nr_sectors -= nskip;
 982                                 thislen -= (nskip << 9);
 983                         }
 984                 }
 985         }
 986
 987         if (ireason == 0) {
 988                 write = 1;
 989                 xferfunc = hwif->tp_ops->output_data;
 990         } else {
 991                 write = 0;
 992                 xferfunc = hwif->tp_ops->input_data;
 993         }
 994
 995         /* transfer data */
 996         while (thislen > 0) {
 997                 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data;
 998                 int blen = rq->data_len;
 999
1000                 /* bio backed? */
1001                 if (rq->bio) {
1002                         if (blk_fs_request(rq)) {
1003                                 ptr = rq->buffer;
1004                                 blen = rq->current_nr_sectors << 9;
1005                         } else {
1006                                 ptr = bio_data(rq->bio);
1007                                 blen = bio_iovec(rq->bio)->bv_len;
1008                         }
1009                 }
1010
1011                 if (!ptr) {
1012                         if (blk_fs_request(rq) && !write)
1013                                 /*
1014                                  * If the buffers are full, pipe the rest into
1015                                  * oblivion.
1016                                  */
1017                                 ide_pad_transfer(drive, 0, thislen);
1018                         else {
1019                                 printk(KERN_ERR "%s: confused, missing data\n",
1020                                                 drive->name);
1021                                 blk_dump_rq_flags(rq, rq_data_dir(rq)
1022                                                   ? "cdrom_newpc_intr, write"
1023                                                   : "cdrom_newpc_intr, read");
1024                         }
1025                         break;
1026                 }
1027
1028                 if (blen > thislen)
1029                         blen = thislen;
1030
1031                 xferfunc(drive, NULL, ptr, blen);
1032
1033                 thislen -= blen;
1034                 len -= blen;
1035
1036                 if (blk_fs_request(rq)) {
1037                         rq->buffer += blen;
1038                         rq->nr_sectors -= (blen >> 9);
1039                         rq->current_nr_sectors -= (blen >> 9);
1040                         rq->sector += (blen >> 9);
1041
1042                         if (rq->current_nr_sectors == 0 && rq->nr_sectors)
1043                                 cdrom_end_request(drive, 1);
1044                 } else {
1045                         rq->data_len -= blen;
1046
1047                         /*
1048                          * The request can't be completed until DRQ is cleared.
1049                          * So complete the data, but don't complete the request
1050                          * using the dummy function for the callback feature
1051                          * of blk_end_request_callback().
1052                          */
1053                         if (rq->bio)
1054                                 blk_end_request_callback(rq, 0, blen,
1055                                                  cdrom_newpc_intr_dummy_cb);
1056                         else
1057                                 rq->data += blen;
1058                 }
1059                 if (!write && blk_sense_request(rq))
1060                         rq->sense_len += blen;
1061         }
1062
1063         /* pad, if necessary */
1064         if (!blk_fs_request(rq) && len > 0)
1065                 ide_pad_transfer(drive, write, len);
1066
1067         if (blk_pc_request(rq)) {
1068                 timeout = rq->timeout;
1069         } else {
1070                 timeout = ATAPI_WAIT_PC;
1071                 if (!blk_fs_request(rq))
1072                         expiry = cdrom_timer_expiry;
1073         }
1074
1075         ide_set_handler(drive, cdrom_newpc_intr, timeout, expiry);
1076         return ide_started;
1077
1078 end_request:
1079         if (blk_pc_request(rq)) {
1080                 unsigned long flags;
1081                 unsigned int dlen = rq->data_len;
1082
1083                 if (dma)
1084                         rq->data_len = 0;
1085
1086                 spin_lock_irqsave(&ide_lock, flags);
1087                 if (__blk_end_request(rq, 0, dlen))
1088                         BUG();
1089                 HWGROUP(drive)->rq = NULL;
1090                 spin_unlock_irqrestore(&ide_lock, flags);
1091         } else {
1092                 if (!uptodate)
1093                         rq->cmd_flags |= REQ_FAILED;
1094                 cdrom_end_request(drive, uptodate);
1095         }
1096         return ide_stopped;
1097 }
1098
1099 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
1100 {
1101         struct cdrom_info *cd = drive->driver_data;
1102         int write = rq_data_dir(rq) == WRITE;
1103         unsigned short sectors_per_frame =
1104                 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
1105
1106         if (write) {
1107                 /* disk has become write protected */
1108                 if (cd->disk->policy) {
1109                         cdrom_end_request(drive, 0);
1110                         return ide_stopped;
1111                 }
1112         } else {
1113                 /*
1114                  * We may be retrying this request after an error.  Fix up any
1115                  * weirdness which might be present in the request packet.
1116                  */
1117                 restore_request(rq);
1118         }
1119
1120         /* use DMA, if possible / writes *must* be hardware frame aligned */
1121         if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
1122             (rq->sector & (sectors_per_frame - 1))) {
1123                 if (write) {
1124                         cdrom_end_request(drive, 0);
1125                         return ide_stopped;
1126                 }
1127                 cd->dma = 0;
1128         } else
1129                 cd->dma = drive->using_dma;
1130
1131         if (write)
1132                 cd->devinfo.media_written = 1;
1133
1134         return ide_started;
1135 }
1136
1137 static ide_startstop_t cdrom_do_newpc_cont(ide_drive_t *drive)
1138 {
1139         struct request *rq = HWGROUP(drive)->rq;
1140
1141         return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
1142 }
1143
1144 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
1145 {
1146         struct cdrom_info *info = drive->driver_data;
1147
1148         if (blk_pc_request(rq))
1149                 rq->cmd_flags |= REQ_QUIET;
1150         else
1151                 rq->cmd_flags &= ~REQ_FAILED;
1152
1153         info->dma = 0;
1154
1155         /* sg request */
1156         if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) {
1157                 struct request_queue *q = drive->queue;
1158                 unsigned int alignment;
1159                 unsigned long addr;
1160                 unsigned long stack_mask = ~(THREAD_SIZE - 1);
1161
1162                 if (rq->bio)
1163                         addr = (unsigned long)bio_data(rq->bio);
1164                 else
1165                         addr = (unsigned long)rq->data;
1166
1167                 info->dma = drive->using_dma;
1168
1169                 /*
1170                  * check if dma is safe
1171                  *
1172                  * NOTE! The "len" and "addr" checks should possibly have
1173                  * separate masks.
1174                  */
1175                 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
1176                 if (addr & alignment || rq->data_len & alignment)
1177                         info->dma = 0;
1178
1179                 if (!((addr & stack_mask) ^
1180                       ((unsigned long)current->stack & stack_mask)))
1181                         info->dma = 0;
1182         }
1183 }
1184
1185 /*
1186  * cdrom driver request routine.
1187  */
1188 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
1189                                         sector_t block)
1190 {
1191         struct cdrom_info *info = drive->driver_data;
1192         ide_handler_t *fn;
1193         int xferlen;
1194
1195         if (blk_fs_request(rq)) {
1196                 if (drive->atapi_flags & IDE_AFLAG_SEEKING) {
1197                         ide_hwif_t *hwif = drive->hwif;
1198                         unsigned long elapsed = jiffies - info->start_seek;
1199                         int stat = hwif->tp_ops->read_status(hwif);
1200
1201                         if ((stat & SEEK_STAT) != SEEK_STAT) {
1202                                 if (elapsed < IDECD_SEEK_TIMEOUT) {
1203                                         ide_stall_queue(drive,
1204                                                         IDECD_SEEK_TIMER);
1205                                         return ide_stopped;
1206                                 }
1207                                 printk(KERN_ERR "%s: DSC timeout\n",
1208                                                 drive->name);
1209                         }
1210                         drive->atapi_flags &= ~IDE_AFLAG_SEEKING;
1211                 }
1212                 if (rq_data_dir(rq) == READ &&
1213                     IDE_LARGE_SEEK(info->last_block, block,
1214                             IDECD_SEEK_THRESHOLD) &&
1215                     drive->dsc_overlap) {
1216                         xferlen = 0;
1217                         fn = cdrom_start_seek_continuation;
1218
1219                         info->dma = 0;
1220                         info->start_seek = jiffies;
1221
1222                         ide_cd_prepare_seek_request(drive, rq);
1223                 } else {
1224                         xferlen = 32768;
1225                         fn = cdrom_start_rw_cont;
1226
1227                         if (cdrom_start_rw(drive, rq) == ide_stopped)
1228                                 return ide_stopped;
1229
1230                         if (ide_cd_prepare_rw_request(drive, rq) == ide_stopped)
1231                                 return ide_stopped;
1232                 }
1233                 info->last_block = block;
1234         } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
1235                    rq->cmd_type == REQ_TYPE_ATA_PC) {
1236                 xferlen = rq->data_len;
1237                 fn = cdrom_do_newpc_cont;
1238
1239                 if (!rq->timeout)
1240                         rq->timeout = ATAPI_WAIT_PC;
1241
1242                 cdrom_do_block_pc(drive, rq);
1243         } else if (blk_special_request(rq)) {
1244                 /* right now this can only be a reset... */
1245                 cdrom_end_request(drive, 1);
1246                 return ide_stopped;
1247         } else {
1248                 blk_dump_rq_flags(rq, "ide-cd bad flags");
1249                 cdrom_end_request(drive, 0);
1250                 return ide_stopped;
1251         }
1252
1253         return cdrom_start_packet_command(drive, xferlen, fn);
1254 }
1255
1256 /*
1257  * Ioctl handling.
1258  *
1259  * Routines which queue packet commands take as a final argument a pointer to a
1260  * request_sense struct. If execution of the command results in an error with a
1261  * CHECK CONDITION status, this structure will be filled with the results of the
1262  * subsequent request sense command. The pointer can also be NULL, in which case
1263  * no sense information is returned.
1264  */
1265 static void msf_from_bcd(struct atapi_msf *msf)
1266 {
1267         msf->minute = BCD2BIN(msf->minute);
1268         msf->second = BCD2BIN(msf->second);
1269         msf->frame  = BCD2BIN(msf->frame);
1270 }
1271
1272 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
1273 {
1274         struct cdrom_info *info = drive->driver_data;
1275         struct cdrom_device_info *cdi = &info->devinfo;
1276         unsigned char cmd[BLK_MAX_CDB];
1277
1278         memset(cmd, 0, BLK_MAX_CDB);
1279         cmd[0] = GPCMD_TEST_UNIT_READY;
1280
1281         /*
1282          * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
1283          * instead of supporting the LOAD_UNLOAD opcode.
1284          */
1285         cmd[7] = cdi->sanyo_slot % 3;
1286
1287         return ide_cd_queue_pc(drive, cmd, 0, NULL, 0, sense, 0, REQ_QUIET);
1288 }
1289
1290 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
1291                                unsigned long *sectors_per_frame,
1292                                struct request_sense *sense)
1293 {
1294         struct {
1295                 __u32 lba;
1296                 __u32 blocklen;
1297         } capbuf;
1298
1299         int stat;
1300         unsigned char cmd[BLK_MAX_CDB];
1301         unsigned len = sizeof(capbuf);
1302
1303         memset(cmd, 0, BLK_MAX_CDB);
1304         cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1305
1306         stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
1307                                REQ_QUIET);
1308         if (stat == 0) {
1309                 *capacity = 1 + be32_to_cpu(capbuf.lba);
1310                 *sectors_per_frame =
1311                         be32_to_cpu(capbuf.blocklen) >> SECTOR_BITS;
1312         }
1313
1314         return stat;
1315 }
1316
1317 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1318                                 int format, char *buf, int buflen,
1319                                 struct request_sense *sense)
1320 {
1321         unsigned char cmd[BLK_MAX_CDB];
1322
1323         memset(cmd, 0, BLK_MAX_CDB);
1324
1325         cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1326         cmd[6] = trackno;
1327         cmd[7] = (buflen >> 8);
1328         cmd[8] = (buflen & 0xff);
1329         cmd[9] = (format << 6);
1330
1331         if (msf_flag)
1332                 cmd[1] = 2;
1333
1334         return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
1335 }
1336
1337 /* Try to read the entire TOC for the disk into our internal buffer. */
1338 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1339 {
1340         int stat, ntracks, i;
1341         struct cdrom_info *info = drive->driver_data;
1342         struct cdrom_device_info *cdi = &info->devinfo;
1343         struct atapi_toc *toc = info->toc;
1344         struct {
1345                 struct atapi_toc_header hdr;
1346                 struct atapi_toc_entry  ent;
1347         } ms_tmp;
1348         long last_written;
1349         unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1350
1351         if (toc == NULL) {
1352                 /* try to allocate space */
1353                 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1354                 if (toc == NULL) {
1355                         printk(KERN_ERR "%s: No cdrom TOC buffer!\n",
1356                                         drive->name);
1357                         return -ENOMEM;
1358                 }
1359                 info->toc = toc;
1360         }
1361
1362         /*
1363          * Check to see if the existing data is still valid. If it is,
1364          * just return.
1365          */
1366         (void) cdrom_check_status(drive, sense);
1367
1368         if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
1369                 return 0;
1370
1371         /* try to get the total cdrom capacity and sector size */
1372         stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1373                                    sense);
1374         if (stat)
1375                 toc->capacity = 0x1fffff;
1376
1377         set_capacity(info->disk, toc->capacity * sectors_per_frame);
1378         /* save a private copy of the TOC capacity for error handling */
1379         drive->probed_capacity = toc->capacity * sectors_per_frame;
1380
1381         blk_queue_hardsect_size(drive->queue,
1382                                 sectors_per_frame << SECTOR_BITS);
1383
1384         /* first read just the header, so we know how long the TOC is */
1385         stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1386                                     sizeof(struct atapi_toc_header), sense);
1387         if (stat)
1388                 return stat;
1389
1390         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1391                 toc->hdr.first_track = BCD2BIN(toc->hdr.first_track);
1392                 toc->hdr.last_track  = BCD2BIN(toc->hdr.last_track);
1393         }
1394
1395         ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1396         if (ntracks <= 0)
1397                 return -EIO;
1398         if (ntracks > MAX_TRACKS)
1399                 ntracks = MAX_TRACKS;
1400
1401         /* now read the whole schmeer */
1402         stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1403                                   (char *)&toc->hdr,
1404                                    sizeof(struct atapi_toc_header) +
1405                                    (ntracks + 1) *
1406                                    sizeof(struct atapi_toc_entry), sense);
1407
1408         if (stat && toc->hdr.first_track > 1) {
1409                 /*
1410                  * Cds with CDI tracks only don't have any TOC entries, despite
1411                  * of this the returned values are
1412                  * first_track == last_track = number of CDI tracks + 1,
1413                  * so that this case is indistinguishable from the same layout
1414                  * plus an additional audio track. If we get an error for the
1415                  * regular case, we assume a CDI without additional audio
1416                  * tracks. In this case the readable TOC is empty (CDI tracks
1417                  * are not included) and only holds the Leadout entry.
1418                  *
1419                  * Heiko Eißfeldt.
1420                  */
1421                 ntracks = 0;
1422                 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1423                                            (char *)&toc->hdr,
1424                                            sizeof(struct atapi_toc_header) +
1425                                            (ntracks + 1) *
1426                                            sizeof(struct atapi_toc_entry),
1427                                            sense);
1428                 if (stat)
1429                         return stat;
1430
1431                 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1432                         toc->hdr.first_track = (u8)BIN2BCD(CDROM_LEADOUT);
1433                         toc->hdr.last_track = (u8)BIN2BCD(CDROM_LEADOUT);
1434                 } else {
1435                         toc->hdr.first_track = CDROM_LEADOUT;
1436                         toc->hdr.last_track = CDROM_LEADOUT;
1437                 }
1438         }
1439
1440         if (stat)
1441                 return stat;
1442
1443         toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1444
1445         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1446                 toc->hdr.first_track = BCD2BIN(toc->hdr.first_track);
1447                 toc->hdr.last_track  = BCD2BIN(toc->hdr.last_track);
1448         }
1449
1450         for (i = 0; i <= ntracks; i++) {
1451                 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1452                         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1453                                 toc->ent[i].track = BCD2BIN(toc->ent[i].track);
1454                         msf_from_bcd(&toc->ent[i].addr.msf);
1455                 }
1456                 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1457                                                   toc->ent[i].addr.msf.second,
1458                                                   toc->ent[i].addr.msf.frame);
1459         }
1460
1461         if (toc->hdr.first_track != CDROM_LEADOUT) {
1462                 /* read the multisession information */
1463                 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1464                                            sizeof(ms_tmp), sense);
1465                 if (stat)
1466                         return stat;
1467
1468                 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1469         } else {
1470                 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1471                 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1472                 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1473         }
1474
1475         if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1476                 /* re-read multisession information using MSF format */
1477                 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1478                                            sizeof(ms_tmp), sense);
1479                 if (stat)
1480                         return stat;
1481
1482                 msf_from_bcd(&ms_tmp.ent.addr.msf);
1483                 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1484                                                    ms_tmp.ent.addr.msf.second,
1485                                                    ms_tmp.ent.addr.msf.frame);
1486         }
1487
1488         toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1489
1490         /* now try to get the total cdrom capacity */
1491         stat = cdrom_get_last_written(cdi, &last_written);
1492         if (!stat && (last_written > toc->capacity)) {
1493                 toc->capacity = last_written;
1494                 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1495                 drive->probed_capacity = toc->capacity * sectors_per_frame;
1496         }
1497
1498         /* Remember that we've read this stuff. */
1499         drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1500
1501         return 0;
1502 }
1503
1504 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1505 {
1506         struct cdrom_info *info = drive->driver_data;
1507         struct cdrom_device_info *cdi = &info->devinfo;
1508         struct packet_command cgc;
1509         int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1510
1511         if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1512                 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1513
1514         init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1515         do {
1516                 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1517                 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1518                 if (!stat)
1519                         break;
1520         } while (--attempts);
1521         return stat;
1522 }
1523
1524 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1525 {
1526         struct cdrom_info *cd = drive->driver_data;
1527         u16 curspeed, maxspeed;
1528
1529         curspeed = *(u16 *)&buf[8 + 14];
1530         maxspeed = *(u16 *)&buf[8 +  8];
1531
1532         if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1533                 curspeed = le16_to_cpu(curspeed);
1534                 maxspeed = le16_to_cpu(maxspeed);
1535         } else {
1536                 curspeed = be16_to_cpu(curspeed);
1537                 maxspeed = be16_to_cpu(maxspeed);
1538         }
1539
1540         cd->current_speed = (curspeed + (176/2)) / 176;
1541         cd->max_speed = (maxspeed + (176/2)) / 176;
1542 }
1543
1544 #define IDE_CD_CAPABILITIES \
1545         (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1546          CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1547          CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1548          CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1549          CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1550
1551 static struct cdrom_device_ops ide_cdrom_dops = {
1552         .open                   = ide_cdrom_open_real,
1553         .release                = ide_cdrom_release_real,
1554         .drive_status           = ide_cdrom_drive_status,
1555         .media_changed          = ide_cdrom_check_media_change_real,
1556         .tray_move              = ide_cdrom_tray_move,
1557         .lock_door              = ide_cdrom_lock_door,
1558         .select_speed           = ide_cdrom_select_speed,
1559         .get_last_session       = ide_cdrom_get_last_session,
1560         .get_mcn                = ide_cdrom_get_mcn,
1561         .reset                  = ide_cdrom_reset,
1562         .audio_ioctl            = ide_cdrom_audio_ioctl,
1563         .capability             = IDE_CD_CAPABILITIES,
1564         .generic_packet         = ide_cdrom_packet,
1565 };
1566
1567 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1568 {
1569         struct cdrom_info *info = drive->driver_data;
1570         struct cdrom_device_info *devinfo = &info->devinfo;
1571
1572         devinfo->ops = &ide_cdrom_dops;
1573         devinfo->speed = info->current_speed;
1574         devinfo->capacity = nslots;
1575         devinfo->handle = drive;
1576         strcpy(devinfo->name, drive->name);
1577
1578         if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1579                 devinfo->mask |= CDC_SELECT_SPEED;
1580
1581         devinfo->disk = info->disk;
1582         return register_cdrom(devinfo);
1583 }
1584
1585 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1586 {
1587         struct cdrom_info *cd = drive->driver_data;
1588         struct cdrom_device_info *cdi = &cd->devinfo;
1589         u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1590         mechtype_t mechtype;
1591         int nslots = 1;
1592
1593         cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1594                      CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1595                      CDC_MO_DRIVE | CDC_RAM);
1596
1597         if (drive->media == ide_optical) {
1598                 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1599                 printk(KERN_ERR "%s: ATAPI magneto-optical drive\n",
1600                                 drive->name);
1601                 return nslots;
1602         }
1603
1604         if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1605                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1606                 cdi->mask &= ~CDC_PLAY_AUDIO;
1607                 return nslots;
1608         }
1609
1610         /*
1611          * We have to cheat a little here. the packet will eventually be queued
1612          * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1613          * Since this device hasn't been registered with the Uniform layer yet,
1614          * it can't do this. Same goes for cdi->ops.
1615          */
1616         cdi->handle = drive;
1617         cdi->ops = &ide_cdrom_dops;
1618
1619         if (ide_cdrom_get_capabilities(drive, buf))
1620                 return 0;
1621
1622         if ((buf[8 + 6] & 0x01) == 0)
1623                 drive->atapi_flags |= IDE_AFLAG_NO_DOORLOCK;
1624         if (buf[8 + 6] & 0x08)
1625                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1626         if (buf[8 + 3] & 0x01)
1627                 cdi->mask &= ~CDC_CD_R;
1628         if (buf[8 + 3] & 0x02)
1629                 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1630         if (buf[8 + 2] & 0x38)
1631                 cdi->mask &= ~CDC_DVD;
1632         if (buf[8 + 3] & 0x20)
1633                 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1634         if (buf[8 + 3] & 0x10)
1635                 cdi->mask &= ~CDC_DVD_R;
1636         if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1637                 cdi->mask &= ~CDC_PLAY_AUDIO;
1638
1639         mechtype = buf[8 + 6] >> 5;
1640         if (mechtype == mechtype_caddy || mechtype == mechtype_popup)
1641                 cdi->mask |= CDC_CLOSE_TRAY;
1642
1643         if (cdi->sanyo_slot > 0) {
1644                 cdi->mask &= ~CDC_SELECT_DISC;
1645                 nslots = 3;
1646         } else if (mechtype == mechtype_individual_changer ||
1647                    mechtype == mechtype_cartridge_changer) {
1648                 nslots = cdrom_number_of_slots(cdi);
1649                 if (nslots > 1)
1650                         cdi->mask &= ~CDC_SELECT_DISC;
1651         }
1652
1653         ide_cdrom_update_speed(drive, buf);
1654
1655         printk(KERN_INFO "%s: ATAPI", drive->name);
1656
1657         /* don't print speed if the drive reported 0 */
1658         if (cd->max_speed)
1659                 printk(KERN_CONT " %dX", cd->max_speed);
1660
1661         printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1662
1663         if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1664                 printk(KERN_CONT " DVD%s%s",
1665                                  (cdi->mask & CDC_DVD_R) ? "" : "-R",
1666                                  (cdi->mask & CDC_DVD_RAM) ? "" : "-RAM");
1667
1668         if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1669                 printk(KERN_CONT " CD%s%s",
1670                                  (cdi->mask & CDC_CD_R) ? "" : "-R",
1671                                  (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1672
1673         if ((cdi->mask & CDC_SELECT_DISC) == 0)
1674                 printk(KERN_CONT " changer w/%d slots", nslots);
1675         else
1676                 printk(KERN_CONT " drive");
1677
1678         printk(KERN_CONT ", %dkB Cache\n", be16_to_cpu(*(u16 *)&buf[8 + 12]));
1679
1680         return nslots;
1681 }
1682
1683 /* standard prep_rq_fn that builds 10 byte cmds */
1684 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1685 {
1686         int hard_sect = queue_hardsect_size(q);
1687         long block = (long)rq->hard_sector / (hard_sect >> 9);
1688         unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1689
1690         memset(rq->cmd, 0, BLK_MAX_CDB);
1691
1692         if (rq_data_dir(rq) == READ)
1693                 rq->cmd[0] = GPCMD_READ_10;
1694         else
1695                 rq->cmd[0] = GPCMD_WRITE_10;
1696
1697         /*
1698          * fill in lba
1699          */
1700         rq->cmd[2] = (block >> 24) & 0xff;
1701         rq->cmd[3] = (block >> 16) & 0xff;
1702         rq->cmd[4] = (block >>  8) & 0xff;
1703         rq->cmd[5] = block & 0xff;
1704
1705         /*
1706          * and transfer length
1707          */
1708         rq->cmd[7] = (blocks >> 8) & 0xff;
1709         rq->cmd[8] = blocks & 0xff;
1710         rq->cmd_len = 10;
1711         return BLKPREP_OK;
1712 }
1713
1714 /*
1715  * Most of the SCSI commands are supported directly by ATAPI devices.
1716  * This transform handles the few exceptions.
1717  */
1718 static int ide_cdrom_prep_pc(struct request *rq)
1719 {
1720         u8 *c = rq->cmd;
1721
1722         /* transform 6-byte read/write commands to the 10-byte version */
1723         if (c[0] == READ_6 || c[0] == WRITE_6) {
1724                 c[8] = c[4];
1725                 c[5] = c[3];
1726                 c[4] = c[2];
1727                 c[3] = c[1] & 0x1f;
1728                 c[2] = 0;
1729                 c[1] &= 0xe0;
1730                 c[0] += (READ_10 - READ_6);
1731                 rq->cmd_len = 10;
1732                 return BLKPREP_OK;
1733         }
1734
1735         /*
1736          * it's silly to pretend we understand 6-byte sense commands, just
1737          * reject with ILLEGAL_REQUEST and the caller should take the
1738          * appropriate action
1739          */
1740         if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1741                 rq->errors = ILLEGAL_REQUEST;
1742                 return BLKPREP_KILL;
1743         }
1744
1745         return BLKPREP_OK;
1746 }
1747
1748 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1749 {
1750         if (blk_fs_request(rq))
1751                 return ide_cdrom_prep_fs(q, rq);
1752         else if (blk_pc_request(rq))
1753                 return ide_cdrom_prep_pc(rq);
1754
1755         return 0;
1756 }
1757
1758 struct cd_list_entry {
1759         const char      *id_model;
1760         const char      *id_firmware;
1761         unsigned int    cd_flags;
1762 };
1763
1764 #ifdef CONFIG_IDE_PROC_FS
1765 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1766 {
1767         unsigned long capacity, sectors_per_frame;
1768
1769         if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1770                 return 0;
1771
1772         return capacity * sectors_per_frame;
1773 }
1774
1775 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1776                                         int count, int *eof, void *data)
1777 {
1778         ide_drive_t *drive = data;
1779         int len;
1780
1781         len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1782         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1783 }
1784
1785 static ide_proc_entry_t idecd_proc[] = {
1786         { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1787         { NULL, 0, NULL, NULL }
1788 };
1789
1790 static void ide_cdrom_add_settings(ide_drive_t *drive)
1791 {
1792         ide_add_setting(drive, "dsc_overlap", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1,
1793                         &drive->dsc_overlap, NULL);
1794 }
1795 #else
1796 static inline void ide_cdrom_add_settings(ide_drive_t *drive) { ; }
1797 #endif
1798
1799 static const struct cd_list_entry ide_cd_quirks_list[] = {
1800         /* Limit transfer size per interrupt. */
1801         { "SAMSUNG CD-ROM SCR-2430", NULL,   IDE_AFLAG_LIMIT_NFRAMES         },
1802         { "SAMSUNG CD-ROM SCR-2432", NULL,   IDE_AFLAG_LIMIT_NFRAMES         },
1803         /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1804         { "SAMSUNG CD-ROM SCR-3231", NULL,   IDE_AFLAG_NO_SPEED_SELECT       },
1805         /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1806         { "NEC CD-ROM DRIVE:260",    "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1807                                              IDE_AFLAG_PRE_ATAPI12,          },
1808         /* Vertos 300, some versions of this drive like to talk BCD. */
1809         { "V003S0DS",                NULL,   IDE_AFLAG_VERTOS_300_SSD,       },
1810         /* Vertos 600 ESD. */
1811         { "V006E0DS",                NULL,   IDE_AFLAG_VERTOS_600_ESD,       },
1812         /*
1813          * Sanyo 3 CD changer uses a non-standard command for CD changing
1814          * (by default standard ATAPI support for CD changers is used).
1815          */
1816         { "CD-ROM CDR-C3 G",         NULL,   IDE_AFLAG_SANYO_3CD             },
1817         { "CD-ROM CDR-C3G",          NULL,   IDE_AFLAG_SANYO_3CD             },
1818         { "CD-ROM CDR_C36",          NULL,   IDE_AFLAG_SANYO_3CD             },
1819         /* Stingray 8X CD-ROM. */
1820         { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1821         /*
1822          * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1823          * mode sense page capabilities size, but older drives break.
1824          */
1825         { "ATAPI CD ROM DRIVE 50X MAX", NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1826         { "WPI CDS-32X",                NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1827         /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1828         { "",                        "241N", IDE_AFLAG_LE_SPEED_FIELDS       },
1829         /*
1830          * Some drives used by Apple don't advertise audio play
1831          * but they do support reading TOC & audio datas.
1832          */
1833         { "MATSHITADVD-ROM SR-8187", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1834         { "MATSHITADVD-ROM SR-8186", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1835         { "MATSHITADVD-ROM SR-8176", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1836         { "MATSHITADVD-ROM SR-8174", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1837         { "Optiarc DVD RW AD-5200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1838         { NULL, NULL, 0 }
1839 };
1840
1841 static unsigned int ide_cd_flags(struct hd_driveid *id)
1842 {
1843         const struct cd_list_entry *cle = ide_cd_quirks_list;
1844
1845         while (cle->id_model) {
1846                 if (strcmp(cle->id_model, id->model) == 0 &&
1847                     (cle->id_firmware == NULL ||
1848                      strstr(id->fw_rev, cle->id_firmware)))
1849                         return cle->cd_flags;
1850                 cle++;
1851         }
1852
1853         return 0;
1854 }
1855
1856 static int ide_cdrom_setup(ide_drive_t *drive)
1857 {
1858         struct cdrom_info *cd = drive->driver_data;
1859         struct cdrom_device_info *cdi = &cd->devinfo;
1860         struct hd_driveid *id = drive->id;
1861         int nslots;
1862
1863         blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
1864         blk_queue_dma_alignment(drive->queue, 31);
1865         blk_queue_update_dma_pad(drive->queue, 15);
1866         drive->queue->unplug_delay = (1 * HZ) / 1000;
1867         if (!drive->queue->unplug_delay)
1868                 drive->queue->unplug_delay = 1;
1869
1870         drive->special.all      = 0;
1871
1872         drive->atapi_flags = IDE_AFLAG_MEDIA_CHANGED | IDE_AFLAG_NO_EJECT |
1873                        ide_cd_flags(id);
1874
1875         if ((id->config & 0x0060) == 0x20)
1876                 drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT;
1877
1878         if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1879             id->fw_rev[4] == '1' && id->fw_rev[6] <= '2')
1880                 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1881                                      IDE_AFLAG_TOCADDR_AS_BCD);
1882         else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1883                  id->fw_rev[4] == '1' && id->fw_rev[6] <= '2')
1884                 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1885         else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1886                 /* 3 => use CD in slot 0 */
1887                 cdi->sanyo_slot = 3;
1888
1889         nslots = ide_cdrom_probe_capabilities(drive);
1890
1891         /* set correct block size */
1892         blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
1893
1894         drive->dsc_overlap = (drive->next != drive);
1895
1896         if (ide_cdrom_register(drive, nslots)) {
1897                 printk(KERN_ERR "%s: %s failed to register device with the"
1898                                 " cdrom driver.\n", drive->name, __func__);
1899                 cd->devinfo.handle = NULL;
1900                 return 1;
1901         }
1902         ide_cdrom_add_settings(drive);
1903         return 0;
1904 }
1905
1906 static void ide_cd_remove(ide_drive_t *drive)
1907 {
1908         struct cdrom_info *info = drive->driver_data;
1909
1910         ide_proc_unregister_driver(drive, info->driver);
1911
1912         del_gendisk(info->disk);
1913
1914         ide_cd_put(info);
1915 }
1916
1917 static void ide_cd_release(struct kref *kref)
1918 {
1919         struct cdrom_info *info = to_ide_cd(kref);
1920         struct cdrom_device_info *devinfo = &info->devinfo;
1921         ide_drive_t *drive = info->drive;
1922         struct gendisk *g = info->disk;
1923
1924         kfree(info->toc);
1925         if (devinfo->handle == drive)
1926                 unregister_cdrom(devinfo);
1927         drive->dsc_overlap = 0;
1928         drive->driver_data = NULL;
1929         blk_queue_prep_rq(drive->queue, NULL);
1930         g->private_data = NULL;
1931         put_disk(g);
1932         kfree(info);
1933 }
1934
1935 static int ide_cd_probe(ide_drive_t *);
1936
1937 static ide_driver_t ide_cdrom_driver = {
1938         .gen_driver = {
1939                 .owner          = THIS_MODULE,
1940                 .name           = "ide-cdrom",
1941                 .bus            = &ide_bus_type,
1942         },
1943         .probe                  = ide_cd_probe,
1944         .remove                 = ide_cd_remove,
1945         .version                = IDECD_VERSION,
1946         .media                  = ide_cdrom,
1947         .supports_dsc_overlap   = 1,
1948         .do_request             = ide_cd_do_request,
1949         .end_request            = ide_end_request,
1950         .error                  = __ide_error,
1951 #ifdef CONFIG_IDE_PROC_FS
1952         .proc                   = idecd_proc,
1953 #endif
1954 };
1955
1956 static int idecd_open(struct inode *inode, struct file *file)
1957 {
1958         struct gendisk *disk = inode->i_bdev->bd_disk;
1959         struct cdrom_info *info;
1960         int rc = -ENOMEM;
1961
1962         info = ide_cd_get(disk);
1963         if (!info)
1964                 return -ENXIO;
1965
1966         rc = cdrom_open(&info->devinfo, inode, file);
1967
1968         if (rc < 0)
1969                 ide_cd_put(info);
1970
1971         return rc;
1972 }
1973
1974 static int idecd_release(struct inode *inode, struct file *file)
1975 {
1976         struct gendisk *disk = inode->i_bdev->bd_disk;
1977         struct cdrom_info *info = ide_cd_g(disk);
1978
1979         cdrom_release(&info->devinfo, file);
1980
1981         ide_cd_put(info);
1982
1983         return 0;
1984 }
1985
1986 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1987 {
1988         struct packet_command cgc;
1989         char buffer[16];
1990         int stat;
1991         char spindown;
1992
1993         if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1994                 return -EFAULT;
1995
1996         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1997
1998         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1999         if (stat)
2000                 return stat;
2001
2002         buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
2003         return cdrom_mode_select(cdi, &cgc);
2004 }
2005
2006 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
2007 {
2008         struct packet_command cgc;
2009         char buffer[16];
2010         int stat;
2011         char spindown;
2012
2013         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
2014
2015         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
2016         if (stat)
2017                 return stat;
2018
2019         spindown = buffer[11] & 0x0f;
2020         if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
2021                 return -EFAULT;
2022         return 0;
2023 }
2024
2025 static int idecd_ioctl(struct inode *inode, struct file *file,
2026                         unsigned int cmd, unsigned long arg)
2027 {
2028         struct block_device *bdev = inode->i_bdev;
2029         struct cdrom_info *info = ide_cd_g(bdev->bd_disk);
2030         int err;
2031
2032         switch (cmd) {
2033         case CDROMSETSPINDOWN:
2034                 return idecd_set_spindown(&info->devinfo, arg);
2035         case CDROMGETSPINDOWN:
2036                 return idecd_get_spindown(&info->devinfo, arg);
2037         default:
2038                 break;
2039         }
2040
2041         err = generic_ide_ioctl(info->drive, file, bdev, cmd, arg);
2042         if (err == -EINVAL)
2043                 err = cdrom_ioctl(file, &info->devinfo, inode, cmd, arg);
2044
2045         return err;
2046 }
2047
2048 static int idecd_media_changed(struct gendisk *disk)
2049 {
2050         struct cdrom_info *info = ide_cd_g(disk);
2051         return cdrom_media_changed(&info->devinfo);
2052 }
2053
2054 static int idecd_revalidate_disk(struct gendisk *disk)
2055 {
2056         struct cdrom_info *info = ide_cd_g(disk);
2057         struct request_sense sense;
2058
2059         ide_cd_read_toc(info->drive, &sense);
2060
2061         return  0;
2062 }
2063
2064 static struct block_device_operations idecd_ops = {
2065         .owner                  = THIS_MODULE,
2066         .open                   = idecd_open,
2067         .release                = idecd_release,
2068         .ioctl                  = idecd_ioctl,
2069         .media_changed          = idecd_media_changed,
2070         .revalidate_disk        = idecd_revalidate_disk
2071 };
2072
2073 /* module options */
2074 static char *ignore;
2075
2076 module_param(ignore, charp, 0400);
2077 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
2078
2079 static int ide_cd_probe(ide_drive_t *drive)
2080 {
2081         struct cdrom_info *info;
2082         struct gendisk *g;
2083         struct request_sense sense;
2084
2085         if (!strstr("ide-cdrom", drive->driver_req))
2086                 goto failed;
2087         if (!drive->present)
2088                 goto failed;
2089         if (drive->media != ide_cdrom && drive->media != ide_optical)
2090                 goto failed;
2091         /* skip drives that we were told to ignore */
2092         if (ignore != NULL) {
2093                 if (strstr(ignore, drive->name)) {
2094                         printk(KERN_INFO "ide-cd: ignoring drive %s\n",
2095                                          drive->name);
2096                         goto failed;
2097                 }
2098         }
2099         info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
2100         if (info == NULL) {
2101                 printk(KERN_ERR "%s: Can't allocate a cdrom structure\n",
2102                                 drive->name);
2103                 goto failed;
2104         }
2105
2106         g = alloc_disk(1 << PARTN_BITS);
2107         if (!g)
2108                 goto out_free_cd;
2109
2110         ide_init_disk(g, drive);
2111
2112         ide_proc_register_driver(drive, &ide_cdrom_driver);
2113
2114         kref_init(&info->kref);
2115
2116         info->drive = drive;
2117         info->driver = &ide_cdrom_driver;
2118         info->disk = g;
2119
2120         g->private_data = &info->driver;
2121
2122         drive->driver_data = info;
2123
2124         g->minors = 1;
2125         g->driverfs_dev = &drive->gendev;
2126         g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
2127         if (ide_cdrom_setup(drive)) {
2128                 ide_proc_unregister_driver(drive, &ide_cdrom_driver);
2129                 ide_cd_release(&info->kref);
2130                 goto failed;
2131         }
2132
2133         ide_cd_read_toc(drive, &sense);
2134         g->fops = &idecd_ops;
2135         g->flags |= GENHD_FL_REMOVABLE;
2136         add_disk(g);
2137         return 0;
2138
2139 out_free_cd:
2140         kfree(info);
2141 failed:
2142         return -ENODEV;
2143 }
2144
2145 static void __exit ide_cdrom_exit(void)
2146 {
2147         driver_unregister(&ide_cdrom_driver.gen_driver);
2148 }
2149
2150 static int __init ide_cdrom_init(void)
2151 {
2152         return driver_register(&ide_cdrom_driver.gen_driver);
2153 }
2154
2155 MODULE_ALIAS("ide:*m-cdrom*");
2156 MODULE_ALIAS("ide-cd");
2157 module_init(ide_cdrom_init);
2158 module_exit(ide_cdrom_exit);
2159 MODULE_LICENSE("GPL");