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         struct cdrom_info *cd = drive->driver_data;
  89
  90         cd->cd_flags |= IDE_CD_FLAG_MEDIA_CHANGED;
  91         cd->cd_flags &= ~IDE_CD_FLAG_TOC_VALID;
  92 }
  93
  94 static int cdrom_log_sense(ide_drive_t *drive, struct request *rq,
  95                            struct request_sense *sense)
  96 {
  97         int log = 0;
  98
  99         if (!sense || !rq || (rq->cmd_flags & REQ_QUIET))
 100                 return 0;
 101
 102         switch (sense->sense_key) {
 103         case NO_SENSE:
 104         case RECOVERED_ERROR:
 105                 break;
 106         case NOT_READY:
 107                 /*
 108                  * don't care about tray state messages for e.g. capacity
 109                  * commands or in-progress or becoming ready
 110                  */
 111                 if (sense->asc == 0x3a || sense->asc == 0x04)
 112                         break;
 113                 log = 1;
 114                 break;
 115         case ILLEGAL_REQUEST:
 116                 /*
 117                  * don't log START_STOP unit with LoEj set, since we cannot
 118                  * reliably check if drive can auto-close
 119                  */
 120                 if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
 121                         break;
 122                 log = 1;
 123                 break;
 124         case UNIT_ATTENTION:
 125                 /*
 126                  * Make good and sure we've seen this potential media change.
 127                  * Some drives (i.e. Creative) fail to present the correct sense
 128                  * key in the error register.
 129                  */
 130                 cdrom_saw_media_change(drive);
 131                 break;
 132         default:
 133                 log = 1;
 134                 break;
 135         }
 136         return log;
 137 }
 138
 139 static void cdrom_analyze_sense_data(ide_drive_t *drive,
 140                               struct request *failed_command,
 141                               struct request_sense *sense)
 142 {
 143         unsigned long sector;
 144         unsigned long bio_sectors;
 145         struct cdrom_info *info = drive->driver_data;
 146
 147         if (!cdrom_log_sense(drive, failed_command, sense))
 148                 return;
 149
 150         /*
 151          * If a read toc is executed for a CD-R or CD-RW medium where the first
 152          * toc has not been recorded yet, it will fail with 05/24/00 (which is a
 153          * confusing error)
 154          */
 155         if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
 156                 if (sense->sense_key == 0x05 && sense->asc == 0x24)
 157                         return;
 158
 159         /* current error */
 160         if (sense->error_code == 0x70) {
 161                 switch (sense->sense_key) {
 162                 case MEDIUM_ERROR:
 163                 case VOLUME_OVERFLOW:
 164                 case ILLEGAL_REQUEST:
 165                         if (!sense->valid)
 166                                 break;
 167                         if (failed_command == NULL ||
 168                                         !blk_fs_request(failed_command))
 169                                 break;
 170                         sector = (sense->information[0] << 24) |
 171                                  (sense->information[1] << 16) |
 172                                  (sense->information[2] <<  8) |
 173                                  (sense->information[3]);
 174
 175                         if (drive->queue->hardsect_size == 2048)
 176                                 /* device sector size is 2K */
 177                                 sector <<= 2;
 178
 179                         bio_sectors = max(bio_sectors(failed_command->bio), 4U);
 180                         sector &= ~(bio_sectors - 1);
 181
 182                         if (sector < get_capacity(info->disk) &&
 183                             drive->probed_capacity - sector < 4 * 75)
 184                                 set_capacity(info->disk, sector);
 185                 }
 186         }
 187
 188         ide_cd_log_error(drive->name, failed_command, sense);
 189 }
 190
 191 static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense,
 192                                       struct request *failed_command)
 193 {
 194         struct cdrom_info *info         = drive->driver_data;
 195         struct request *rq              = &info->request_sense_request;
 196
 197         if (sense == NULL)
 198                 sense = &info->sense_data;
 199
 200         /* stuff the sense request in front of our current request */
 201         blk_rq_init(NULL, rq);
 202         rq->cmd_type = REQ_TYPE_ATA_PC;
 203         rq->rq_disk = info->disk;
 204
 205         rq->data = sense;
 206         rq->cmd[0] = GPCMD_REQUEST_SENSE;
 207         rq->cmd[4] = 18;
 208         rq->data_len = 18;
 209
 210         rq->cmd_type = REQ_TYPE_SENSE;
 211         rq->cmd_flags |= REQ_PREEMPT;
 212
 213         /* NOTE! Save the failed command in "rq->buffer" */
 214         rq->buffer = (void *) failed_command;
 215
 216         ide_do_drive_cmd(drive, rq);
 217 }
 218
 219 static void cdrom_end_request(ide_drive_t *drive, int uptodate)
 220 {
 221         struct request *rq = HWGROUP(drive)->rq;
 222         int nsectors = rq->hard_cur_sectors;
 223
 224         if (blk_sense_request(rq) && uptodate) {
 225                 /*
 226                  * For REQ_TYPE_SENSE, "rq->buffer" points to the original
 227                  * failed request
 228                  */
 229                 struct request *failed = (struct request *) rq->buffer;
 230                 struct cdrom_info *info = drive->driver_data;
 231                 void *sense = &info->sense_data;
 232                 unsigned long flags;
 233
 234                 if (failed) {
 235                         if (failed->sense) {
 236                                 sense = failed->sense;
 237                                 failed->sense_len = rq->sense_len;
 238                         }
 239                         cdrom_analyze_sense_data(drive, failed, sense);
 240                         /*
 241                          * now end the failed request
 242                          */
 243                         if (blk_fs_request(failed)) {
 244                                 if (ide_end_dequeued_request(drive, failed, 0,
 245                                                 failed->hard_nr_sectors))
 246                                         BUG();
 247                         } else {
 248                                 spin_lock_irqsave(&ide_lock, flags);
 249                                 if (__blk_end_request(failed, -EIO,
 250                                                       failed->data_len))
 251                                         BUG();
 252                                 spin_unlock_irqrestore(&ide_lock, flags);
 253                         }
 254                 } else
 255                         cdrom_analyze_sense_data(drive, NULL, sense);
 256         }
 257
 258         if (!rq->current_nr_sectors && blk_fs_request(rq))
 259                 uptodate = 1;
 260         /* make sure it's fully ended */
 261         if (blk_pc_request(rq))
 262                 nsectors = (rq->data_len + 511) >> 9;
 263         if (!nsectors)
 264                 nsectors = 1;
 265
 266         ide_end_request(drive, uptodate, nsectors);
 267 }
 268
 269 static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 st)
 270 {
 271         if (st & 0x80)
 272                 return;
 273         ide_dump_status(drive, msg, st);
 274 }
 275
 276 /*
 277  * Returns:
 278  * 0: if the request should be continued.
 279  * 1: if the request was ended.
 280  */
 281 static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
 282 {
 283         ide_hwif_t *hwif = drive->hwif;
 284         struct request *rq = hwif->hwgroup->rq;
 285         int stat, err, sense_key;
 286
 287         /* check for errors */
 288         stat = hwif->tp_ops->read_status(hwif);
 289
 290         if (stat_ret)
 291                 *stat_ret = stat;
 292
 293         if (OK_STAT(stat, good_stat, BAD_R_STAT))
 294                 return 0;
 295
 296         /* get the IDE error register */
 297         err = ide_read_error(drive);
 298         sense_key = err >> 4;
 299
 300         if (rq == NULL) {
 301                 printk(KERN_ERR "%s: missing rq in %s\n",
 302                                 drive->name, __func__);
 303                 return 1;
 304         }
 305
 306         if (blk_sense_request(rq)) {
 307                 /*
 308                  * We got an error trying to get sense info from the drive
 309                  * (probably while trying to recover from a former error).
 310                  * Just give up.
 311                  */
 312                 rq->cmd_flags |= REQ_FAILED;
 313                 cdrom_end_request(drive, 0);
 314                 ide_error(drive, "request sense failure", stat);
 315                 return 1;
 316
 317         } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) {
 318                 /* All other functions, except for READ. */
 319
 320                 /*
 321                  * if we have an error, pass back CHECK_CONDITION as the
 322                  * scsi status byte
 323                  */
 324                 if (blk_pc_request(rq) && !rq->errors)
 325                         rq->errors = SAM_STAT_CHECK_CONDITION;
 326
 327                 /* check for tray open */
 328                 if (sense_key == NOT_READY) {
 329                         cdrom_saw_media_change(drive);
 330                 } else if (sense_key == UNIT_ATTENTION) {
 331                         /* check for media change */
 332                         cdrom_saw_media_change(drive);
 333                         return 0;
 334                 } else if (sense_key == ILLEGAL_REQUEST &&
 335                            rq->cmd[0] == GPCMD_START_STOP_UNIT) {
 336                         /*
 337                          * Don't print error message for this condition--
 338                          * SFF8090i indicates that 5/24/00 is the correct
 339                          * response to a request to close the tray if the
 340                          * drive doesn't have that capability.
 341                          * cdrom_log_sense() knows this!
 342                          */
 343                 } else if (!(rq->cmd_flags & REQ_QUIET)) {
 344                         /* otherwise, print an error */
 345                         ide_dump_status(drive, "packet command error", stat);
 346                 }
 347
 348                 rq->cmd_flags |= REQ_FAILED;
 349
 350                 /*
 351                  * instead of playing games with moving completions around,
 352                  * remove failed request completely and end it when the
 353                  * request sense has completed
 354                  */
 355                 goto end_request;
 356
 357         } else if (blk_fs_request(rq)) {
 358                 int do_end_request = 0;
 359
 360                 /* handle errors from READ and WRITE requests */
 361
 362                 if (blk_noretry_request(rq))
 363                         do_end_request = 1;
 364
 365                 if (sense_key == NOT_READY) {
 366                         /* tray open */
 367                         if (rq_data_dir(rq) == READ) {
 368                                 cdrom_saw_media_change(drive);
 369
 370                                 /* fail the request */
 371                                 printk(KERN_ERR "%s: tray open\n", drive->name);
 372                                 do_end_request = 1;
 373                         } else {
 374                                 struct cdrom_info *info = drive->driver_data;
 375
 376                                 /*
 377                                  * Allow the drive 5 seconds to recover, some
 378                                  * devices will return this error while flushing
 379                                  * data from cache.
 380                                  */
 381                                 if (!rq->errors)
 382                                         info->write_timeout = jiffies +
 383                                                         ATAPI_WAIT_WRITE_BUSY;
 384                                 rq->errors = 1;
 385                                 if (time_after(jiffies, info->write_timeout))
 386                                         do_end_request = 1;
 387                                 else {
 388                                         unsigned long flags;
 389
 390                                         /*
 391                                          * take a breather relying on the unplug
 392                                          * timer to kick us again
 393                                          */
 394                                         spin_lock_irqsave(&ide_lock, flags);
 395                                         blk_plug_device(drive->queue);
 396                                         spin_unlock_irqrestore(&ide_lock,
 397                                                                 flags);
 398                                         return 1;
 399                                 }
 400                         }
 401                 } else if (sense_key == UNIT_ATTENTION) {
 402                         /* media change */
 403                         cdrom_saw_media_change(drive);
 404
 405                         /*
 406                          * Arrange to retry the request but be sure to give up
 407                          * if we've retried too many times.
 408                          */
 409                         if (++rq->errors > ERROR_MAX)
 410                                 do_end_request = 1;
 411                 } else if (sense_key == ILLEGAL_REQUEST ||
 412                            sense_key == DATA_PROTECT) {
 413                         /*
 414                          * No point in retrying after an illegal request or data
 415                          * protect error.
 416                          */
 417                         ide_dump_status_no_sense(drive, "command error", stat);
 418                         do_end_request = 1;
 419                 } else if (sense_key == MEDIUM_ERROR) {
 420                         /*
 421                          * No point in re-trying a zillion times on a bad
 422                          * sector. If we got here the error is not correctable.
 423                          */
 424                         ide_dump_status_no_sense(drive,
 425                                                  "media error (bad sector)",
 426                                                  stat);
 427                         do_end_request = 1;
 428                 } else if (sense_key == BLANK_CHECK) {
 429                         /* disk appears blank ?? */
 430                         ide_dump_status_no_sense(drive, "media error (blank)",
 431                                                  stat);
 432                         do_end_request = 1;
 433                 } else if ((err & ~ABRT_ERR) != 0) {
 434                         /* go to the default handler for other errors */
 435                         ide_error(drive, "cdrom_decode_status", stat);
 436                         return 1;
 437                 } else if ((++rq->errors > ERROR_MAX)) {
 438                         /* we've racked up too many retries, abort */
 439                         do_end_request = 1;
 440                 }
 441
 442                 /*
 443                  * End a request through request sense analysis when we have
 444                  * sense data. We need this in order to perform end of media
 445                  * processing.
 446                  */
 447                 if (do_end_request)
 448                         goto end_request;
 449
 450                 /*
 451                  * If we got a CHECK_CONDITION status, queue
 452                  * a request sense command.
 453                  */
 454                 if (stat & ERR_STAT)
 455                         cdrom_queue_request_sense(drive, NULL, NULL);
 456         } else {
 457                 blk_dump_rq_flags(rq, "ide-cd: bad rq");
 458                 cdrom_end_request(drive, 0);
 459         }
 460
 461         /* retry, or handle the next request */
 462         return 1;
 463
 464 end_request:
 465         if (stat & ERR_STAT) {
 466                 unsigned long flags;
 467
 468                 spin_lock_irqsave(&ide_lock, flags);
 469                 blkdev_dequeue_request(rq);
 470                 HWGROUP(drive)->rq = NULL;
 471                 spin_unlock_irqrestore(&ide_lock, flags);
 472
 473                 cdrom_queue_request_sense(drive, rq->sense, rq);
 474         } else
 475                 cdrom_end_request(drive, 0);
 476
 477         return 1;
 478 }
 479
 480 static int cdrom_timer_expiry(ide_drive_t *drive)
 481 {
 482         struct request *rq = HWGROUP(drive)->rq;
 483         unsigned long wait = 0;
 484
 485         /*
 486          * Some commands are *slow* and normally take a long time to complete.
 487          * Usually we can use the ATAPI "disconnect" to bypass this, but not all
 488          * commands/drives support that. Let ide_timer_expiry keep polling us
 489          * for these.
 490          */
 491         switch (rq->cmd[0]) {
 492         case GPCMD_BLANK:
 493         case GPCMD_FORMAT_UNIT:
 494         case GPCMD_RESERVE_RZONE_TRACK:
 495         case GPCMD_CLOSE_TRACK:
 496         case GPCMD_FLUSH_CACHE:
 497                 wait = ATAPI_WAIT_PC;
 498                 break;
 499         default:
 500                 if (!(rq->cmd_flags & REQ_QUIET))
 501                         printk(KERN_INFO "ide-cd: cmd 0x%x timed out\n",
 502                                          rq->cmd[0]);
 503                 wait = 0;
 504                 break;
 505         }
 506         return wait;
 507 }
 508
 509 /*
 510  * Set up the device registers for transferring a packet command on DEV,
 511  * expecting to later transfer XFERLEN bytes.  HANDLER is the routine
 512  * which actually transfers the command to the drive.  If this is a
 513  * drq_interrupt device, this routine will arrange for HANDLER to be
 514  * called when the interrupt from the drive arrives.  Otherwise, HANDLER
 515  * will be called immediately after the drive is prepared for the transfer.
 516  */
 517 static ide_startstop_t cdrom_start_packet_command(ide_drive_t *drive,
 518                                                   int xferlen,
 519                                                   ide_handler_t *handler)
 520 {
 521         struct cdrom_info *info = drive->driver_data;
 522         ide_hwif_t *hwif = drive->hwif;
 523
 524         /* FIXME: for Virtual DMA we must check harder */
 525         if (info->dma)
 526                 info->dma = !hwif->dma_ops->dma_setup(drive);
 527
 528         /* set up the controller registers */
 529         ide_pktcmd_tf_load(drive, IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL,
 530                            xferlen, info->dma);
 531
 532         if (info->cd_flags & IDE_CD_FLAG_DRQ_INTERRUPT) {
 533                 /* waiting for CDB interrupt, not DMA yet. */
 534                 if (info->dma)
 535                         drive->waiting_for_dma = 0;
 536
 537                 /* packet command */
 538                 ide_execute_command(drive, WIN_PACKETCMD, handler,
 539                                     ATAPI_WAIT_PC, cdrom_timer_expiry);
 540                 return ide_started;
 541         } else {
 542                 ide_execute_pkt_cmd(drive);
 543
 544                 return (*handler) (drive);
 545         }
 546 }
 547
 548 /*
 549  * Send a packet command to DRIVE described by CMD_BUF and CMD_LEN. The device
 550  * registers must have already been prepared by cdrom_start_packet_command.
 551  * HANDLER is the interrupt handler to call when the command completes or
 552  * there's data ready.
 553  */
 554 #define ATAPI_MIN_CDB_BYTES 12
 555 static ide_startstop_t cdrom_transfer_packet_command(ide_drive_t *drive,
 556                                           struct request *rq,
 557                                           ide_handler_t *handler)
 558 {
 559         ide_hwif_t *hwif = drive->hwif;
 560         int cmd_len;
 561         struct cdrom_info *info = drive->driver_data;
 562         ide_startstop_t startstop;
 563
 564         if (info->cd_flags & IDE_CD_FLAG_DRQ_INTERRUPT) {
 565                 /*
 566                  * Here we should have been called after receiving an interrupt
 567                  * from the device.  DRQ should how be set.
 568                  */
 569
 570                 /* check for errors */
 571                 if (cdrom_decode_status(drive, DRQ_STAT, NULL))
 572                         return ide_stopped;
 573
 574                 /* ok, next interrupt will be DMA interrupt */
 575                 if (info->dma)
 576                         drive->waiting_for_dma = 1;
 577         } else {
 578                 /* otherwise, we must wait for DRQ to get set */
 579                 if (ide_wait_stat(&startstop, drive, DRQ_STAT,
 580                                 BUSY_STAT, WAIT_READY))
 581                         return startstop;
 582         }
 583
 584         /* arm the interrupt handler */
 585         ide_set_handler(drive, handler, rq->timeout, cdrom_timer_expiry);
 586
 587         /* ATAPI commands get padded out to 12 bytes minimum */
 588         cmd_len = COMMAND_SIZE(rq->cmd[0]);
 589         if (cmd_len < ATAPI_MIN_CDB_BYTES)
 590                 cmd_len = ATAPI_MIN_CDB_BYTES;
 591
 592         /* send the command to the device */
 593         hwif->tp_ops->output_data(drive, NULL, rq->cmd, cmd_len);
 594
 595         /* start the DMA if need be */
 596         if (info->dma)
 597                 hwif->dma_ops->dma_start(drive);
 598
 599         return ide_started;
 600 }
 601
 602 /*
 603  * Check the contents of the interrupt reason register from the cdrom
 604  * and attempt to recover if there are problems.  Returns  0 if everything's
 605  * ok; nonzero if the request has been terminated.
 606  */
 607 static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
 608                                 int len, int ireason, int rw)
 609 {
 610         ide_hwif_t *hwif = drive->hwif;
 611
 612         /*
 613          * ireason == 0: the drive wants to receive data from us
 614          * ireason == 2: the drive is expecting to transfer data to us
 615          */
 616         if (ireason == (!rw << 1))
 617                 return 0;
 618         else if (ireason == (rw << 1)) {
 619
 620                 /* whoops... */
 621                 printk(KERN_ERR "%s: %s: wrong transfer direction!\n",
 622                                 drive->name, __func__);
 623
 624                 ide_pad_transfer(drive, rw, len);
 625         } else  if (rw == 0 && ireason == 1) {
 626                 /*
 627                  * Some drives (ASUS) seem to tell us that status info is
 628                  * available.  Just get it and ignore.
 629                  */
 630                 (void)hwif->tp_ops->read_status(hwif);
 631                 return 0;
 632         } else {
 633                 /* drive wants a command packet, or invalid ireason... */
 634                 printk(KERN_ERR "%s: %s: bad interrupt reason 0x%02x\n",
 635                                 drive->name, __func__, ireason);
 636         }
 637
 638         if (rq->cmd_type == REQ_TYPE_ATA_PC)
 639                 rq->cmd_flags |= REQ_FAILED;
 640
 641         cdrom_end_request(drive, 0);
 642         return -1;
 643 }
 644
 645 /*
 646  * Assume that the drive will always provide data in multiples of at least
 647  * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise.
 648  */
 649 static int ide_cd_check_transfer_size(ide_drive_t *drive, int len)
 650 {
 651         struct cdrom_info *cd = drive->driver_data;
 652
 653         if ((len % SECTOR_SIZE) == 0)
 654                 return 0;
 655
 656         printk(KERN_ERR "%s: %s: Bad transfer size %d\n",
 657                         drive->name, __func__, len);
 658
 659         if (cd->cd_flags & IDE_CD_FLAG_LIMIT_NFRAMES)
 660                 printk(KERN_ERR "  This drive is not supported by "
 661                                 "this version of the driver\n");
 662         else {
 663                 printk(KERN_ERR "  Trying to limit transfer sizes\n");
 664                 cd->cd_flags |= IDE_CD_FLAG_LIMIT_NFRAMES;
 665         }
 666
 667         return 1;
 668 }
 669
 670 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *);
 671
 672 static ide_startstop_t ide_cd_prepare_rw_request(ide_drive_t *drive,
 673                                                  struct request *rq)
 674 {
 675         if (rq_data_dir(rq) == READ) {
 676                 unsigned short sectors_per_frame =
 677                         queue_hardsect_size(drive->queue) >> SECTOR_BITS;
 678                 int nskip = rq->sector & (sectors_per_frame - 1);
 679
 680                 /*
 681                  * If the requested sector doesn't start on a frame boundary,
 682                  * we must adjust the start of the transfer so that it does,
 683                  * and remember to skip the first few sectors.
 684                  *
 685                  * If the rq->current_nr_sectors field is larger than the size
 686                  * of the buffer, it will mean that we're to skip a number of
 687                  * sectors equal to the amount by which rq->current_nr_sectors
 688                  * is larger than the buffer size.
 689                  */
 690                 if (nskip > 0) {
 691                         /* sanity check... */
 692                         if (rq->current_nr_sectors !=
 693                             bio_cur_sectors(rq->bio)) {
 694                                 printk(KERN_ERR "%s: %s: buffer botch (%u)\n",
 695                                                 drive->name, __func__,
 696                                                 rq->current_nr_sectors);
 697                                 cdrom_end_request(drive, 0);
 698                                 return ide_stopped;
 699                         }
 700                         rq->current_nr_sectors += nskip;
 701                 }
 702         }
 703 #if 0
 704         else
 705                 /* the immediate bit */
 706                 rq->cmd[1] = 1 << 3;
 707 #endif
 708         /* set up the command */
 709         rq->timeout = ATAPI_WAIT_PC;
 710
 711         return ide_started;
 712 }
 713
 714 /*
 715  * Routine to send a read/write packet command to the drive. This is usually
 716  * called directly from cdrom_start_{read,write}(). However, for drq_interrupt
 717  * devices, it is called from an interrupt when the drive is ready to accept
 718  * the command.
 719  */
 720 static ide_startstop_t cdrom_start_rw_cont(ide_drive_t *drive)
 721 {
 722         struct request *rq = drive->hwif->hwgroup->rq;
 723
 724         /* send the command to the drive and return */
 725         return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
 726 }
 727
 728 #define IDECD_SEEK_THRESHOLD    (1000)                  /* 1000 blocks */
 729 #define IDECD_SEEK_TIMER        (5 * WAIT_MIN_SLEEP)    /* 100 ms */
 730 #define IDECD_SEEK_TIMEOUT      (2 * WAIT_CMD)          /* 20 sec */
 731
 732 static ide_startstop_t cdrom_seek_intr(ide_drive_t *drive)
 733 {
 734         struct cdrom_info *info = drive->driver_data;
 735         int stat;
 736         static int retry = 10;
 737
 738         if (cdrom_decode_status(drive, 0, &stat))
 739                 return ide_stopped;
 740
 741         info->cd_flags |= IDE_CD_FLAG_SEEKING;
 742
 743         if (retry && time_after(jiffies, info->start_seek + IDECD_SEEK_TIMER)) {
 744                 if (--retry == 0)
 745                         drive->dsc_overlap = 0;
 746         }
 747         return ide_stopped;
 748 }
 749
 750 static void ide_cd_prepare_seek_request(ide_drive_t *drive, struct request *rq)
 751 {
 752         sector_t frame = rq->sector;
 753
 754         sector_div(frame, queue_hardsect_size(drive->queue) >> SECTOR_BITS);
 755
 756         memset(rq->cmd, 0, BLK_MAX_CDB);
 757         rq->cmd[0] = GPCMD_SEEK;
 758         put_unaligned(cpu_to_be32(frame), (unsigned int *) &rq->cmd[2]);
 759
 760         rq->timeout = ATAPI_WAIT_PC;
 761 }
 762
 763 static ide_startstop_t cdrom_start_seek_continuation(ide_drive_t *drive)
 764 {
 765         struct request *rq = drive->hwif->hwgroup->rq;
 766
 767         return cdrom_transfer_packet_command(drive, rq, &cdrom_seek_intr);
 768 }
 769
 770 /*
 771  * Fix up a possibly partially-processed request so that we can start it over
 772  * entirely, or even put it back on the request queue.
 773  */
 774 static void restore_request(struct request *rq)
 775 {
 776         if (rq->buffer != bio_data(rq->bio)) {
 777                 sector_t n =
 778                         (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE;
 779
 780                 rq->buffer = bio_data(rq->bio);
 781                 rq->nr_sectors += n;
 782                 rq->sector -= n;
 783         }
 784         rq->current_nr_sectors = bio_cur_sectors(rq->bio);
 785         rq->hard_cur_sectors = rq->current_nr_sectors;
 786         rq->hard_nr_sectors = rq->nr_sectors;
 787         rq->hard_sector = rq->sector;
 788         rq->q->prep_rq_fn(rq->q, rq);
 789 }
 790
 791 /*
 792  * All other packet commands.
 793  */
 794 static void ide_cd_request_sense_fixup(struct request *rq)
 795 {
 796         /*
 797          * Some of the trailing request sense fields are optional,
 798          * and some drives don't send them.  Sigh.
 799          */
 800         if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
 801             rq->data_len > 0 && rq->data_len <= 5)
 802                 while (rq->data_len > 0) {
 803                         *(u8 *)rq->data++ = 0;
 804                         --rq->data_len;
 805                 }
 806 }
 807
 808 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
 809                     int write, void *buffer, unsigned *bufflen,
 810                     struct request_sense *sense, int timeout,
 811                     unsigned int cmd_flags)
 812 {
 813         struct cdrom_info *info = drive->driver_data;
 814         struct request_sense local_sense;
 815         int retries = 10;
 816         unsigned int flags = 0;
 817
 818         if (!sense)
 819                 sense = &local_sense;
 820
 821         /* start of retry loop */
 822         do {
 823                 struct request *rq;
 824                 int error;
 825
 826                 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
 827
 828                 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
 829                 rq->cmd_type = REQ_TYPE_ATA_PC;
 830                 rq->sense = sense;
 831                 rq->cmd_flags |= cmd_flags;
 832                 rq->timeout = timeout;
 833                 if (buffer) {
 834                         rq->data = buffer;
 835                         rq->data_len = *bufflen;
 836                 }
 837
 838                 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
 839
 840                 if (buffer)
 841                         *bufflen = rq->data_len;
 842
 843                 flags = rq->cmd_flags;
 844                 blk_put_request(rq);
 845
 846                 /*
 847                  * FIXME: we should probably abort/retry or something in case of
 848                  * failure.
 849                  */
 850                 if (flags & REQ_FAILED) {
 851                         /*
 852                          * The request failed.  Retry if it was due to a unit
 853                          * attention status (usually means media was changed).
 854                          */
 855                         struct request_sense *reqbuf = sense;
 856
 857                         if (reqbuf->sense_key == UNIT_ATTENTION)
 858                                 cdrom_saw_media_change(drive);
 859                         else if (reqbuf->sense_key == NOT_READY &&
 860                                  reqbuf->asc == 4 && reqbuf->ascq != 4) {
 861                                 /*
 862                                  * The drive is in the process of loading
 863                                  * a disk.  Retry, but wait a little to give
 864                                  * the drive time to complete the load.
 865                                  */
 866                                 ssleep(2);
 867                         } else {
 868                                 /* otherwise, don't retry */
 869                                 retries = 0;
 870                         }
 871                         --retries;
 872                 }
 873
 874                 /* end of retry loop */
 875         } while ((flags & REQ_FAILED) && retries >= 0);
 876
 877         /* return an error if the command failed */
 878         return (flags & REQ_FAILED) ? -EIO : 0;
 879 }
 880
 881 /*
 882  * Called from blk_end_request_callback() after the data of the request is
 883  * completed and before the request itself is completed. By returning value '1',
 884  * blk_end_request_callback() returns immediately without completing it.
 885  */
 886 static int cdrom_newpc_intr_dummy_cb(struct request *rq)
 887 {
 888         return 1;
 889 }
 890
 891 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 892 {
 893         ide_hwif_t *hwif = drive->hwif;
 894         struct cdrom_info *info = drive->driver_data;
 895         struct request *rq = HWGROUP(drive)->rq;
 896         xfer_func_t *xferfunc;
 897         ide_expiry_t *expiry = NULL;
 898         int dma_error = 0, dma, stat, thislen, uptodate = 0;
 899         int write = (rq_data_dir(rq) == WRITE) ? 1 : 0;
 900         unsigned int timeout;
 901         u16 len;
 902         u8 ireason;
 903
 904         /* check for errors */
 905         dma = info->dma;
 906         if (dma) {
 907                 info->dma = 0;
 908                 dma_error = hwif->dma_ops->dma_end(drive);
 909                 if (dma_error) {
 910                         printk(KERN_ERR "%s: DMA %s error\n", drive->name,
 911                                         write ? "write" : "read");
 912                         ide_dma_off(drive);
 913                 }
 914         }
 915
 916         if (cdrom_decode_status(drive, 0, &stat))
 917                 return ide_stopped;
 918
 919         /* using dma, transfer is complete now */
 920         if (dma) {
 921                 if (dma_error)
 922                         return ide_error(drive, "dma error", stat);
 923                 if (blk_fs_request(rq)) {
 924                         ide_end_request(drive, 1, rq->nr_sectors);
 925                         return ide_stopped;
 926                 }
 927                 goto end_request;
 928         }
 929
 930         ide_read_bcount_and_ireason(drive, &len, &ireason);
 931
 932         thislen = blk_fs_request(rq) ? len : rq->data_len;
 933         if (thislen > len)
 934                 thislen = len;
 935
 936         /* If DRQ is clear, the command has completed. */
 937         if ((stat & DRQ_STAT) == 0) {
 938                 if (blk_fs_request(rq)) {
 939                         /*
 940                          * If we're not done reading/writing, complain.
 941                          * Otherwise, complete the command normally.
 942                          */
 943                         uptodate = 1;
 944                         if (rq->current_nr_sectors > 0) {
 945                                 printk(KERN_ERR "%s: %s: data underrun "
 946                                                 "(%d blocks)\n",
 947                                                 drive->name, __func__,
 948                                                 rq->current_nr_sectors);
 949                                 if (!write)
 950                                         rq->cmd_flags |= REQ_FAILED;
 951                                 uptodate = 0;
 952                         }
 953                         cdrom_end_request(drive, uptodate);
 954                         return ide_stopped;
 955                 } else if (!blk_pc_request(rq)) {
 956                         ide_cd_request_sense_fixup(rq);
 957                         /* complain if we still have data left to transfer */
 958                         uptodate = rq->data_len ? 0 : 1;
 959                 }
 960                 goto end_request;
 961         }
 962
 963         /* check which way to transfer data */
 964         if (ide_cd_check_ireason(drive, rq, len, ireason, write))
 965                 return ide_stopped;
 966
 967         if (blk_fs_request(rq)) {
 968                 if (write == 0) {
 969                         int nskip;
 970
 971                         if (ide_cd_check_transfer_size(drive, len)) {
 972                                 cdrom_end_request(drive, 0);
 973                                 return ide_stopped;
 974                         }
 975
 976                         /*
 977                          * First, figure out if we need to bit-bucket
 978                          * any of the leading sectors.
 979                          */
 980                         nskip = min_t(int, rq->current_nr_sectors
 981                                            - bio_cur_sectors(rq->bio),
 982                                            thislen >> 9);
 983                         if (nskip > 0) {
 984                                 ide_pad_transfer(drive, write, nskip << 9);
 985                                 rq->current_nr_sectors -= nskip;
 986                                 thislen -= (nskip << 9);
 987                         }
 988                 }
 989         }
 990
 991         if (ireason == 0) {
 992                 write = 1;
 993                 xferfunc = hwif->tp_ops->output_data;
 994         } else {
 995                 write = 0;
 996                 xferfunc = hwif->tp_ops->input_data;
 997         }
 998
 999         /* transfer data */
1000         while (thislen > 0) {
1001                 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data;
1002                 int blen = rq->data_len;
1003
1004                 /* bio backed? */
1005                 if (rq->bio) {
1006                         if (blk_fs_request(rq)) {
1007                                 ptr = rq->buffer;
1008                                 blen = rq->current_nr_sectors << 9;
1009                         } else {
1010                                 ptr = bio_data(rq->bio);
1011                                 blen = bio_iovec(rq->bio)->bv_len;
1012                         }
1013                 }
1014
1015                 if (!ptr) {
1016                         if (blk_fs_request(rq) && !write)
1017                                 /*
1018                                  * If the buffers are full, pipe the rest into
1019                                  * oblivion.
1020                                  */
1021                                 ide_pad_transfer(drive, 0, thislen);
1022                         else {
1023                                 printk(KERN_ERR "%s: confused, missing data\n",
1024                                                 drive->name);
1025                                 blk_dump_rq_flags(rq, rq_data_dir(rq)
1026                                                   ? "cdrom_newpc_intr, write"
1027                                                   : "cdrom_newpc_intr, read");
1028                         }
1029                         break;
1030                 }
1031
1032                 if (blen > thislen)
1033                         blen = thislen;
1034
1035                 xferfunc(drive, NULL, ptr, blen);
1036
1037                 thislen -= blen;
1038                 len -= blen;
1039
1040                 if (blk_fs_request(rq)) {
1041                         rq->buffer += blen;
1042                         rq->nr_sectors -= (blen >> 9);
1043                         rq->current_nr_sectors -= (blen >> 9);
1044                         rq->sector += (blen >> 9);
1045
1046                         if (rq->current_nr_sectors == 0 && rq->nr_sectors)
1047                                 cdrom_end_request(drive, 1);
1048                 } else {
1049                         rq->data_len -= blen;
1050
1051                         /*
1052                          * The request can't be completed until DRQ is cleared.
1053                          * So complete the data, but don't complete the request
1054                          * using the dummy function for the callback feature
1055                          * of blk_end_request_callback().
1056                          */
1057                         if (rq->bio)
1058                                 blk_end_request_callback(rq, 0, blen,
1059                                                  cdrom_newpc_intr_dummy_cb);
1060                         else
1061                                 rq->data += blen;
1062                 }
1063                 if (!write && blk_sense_request(rq))
1064                         rq->sense_len += blen;
1065         }
1066
1067         /* pad, if necessary */
1068         if (!blk_fs_request(rq) && len > 0)
1069                 ide_pad_transfer(drive, write, len);
1070
1071         if (blk_pc_request(rq)) {
1072                 timeout = rq->timeout;
1073         } else {
1074                 timeout = ATAPI_WAIT_PC;
1075                 if (!blk_fs_request(rq))
1076                         expiry = cdrom_timer_expiry;
1077         }
1078
1079         ide_set_handler(drive, cdrom_newpc_intr, timeout, expiry);
1080         return ide_started;
1081
1082 end_request:
1083         if (blk_pc_request(rq)) {
1084                 unsigned long flags;
1085                 unsigned int dlen = rq->data_len;
1086
1087                 if (dma)
1088                         rq->data_len = 0;
1089
1090                 spin_lock_irqsave(&ide_lock, flags);
1091                 if (__blk_end_request(rq, 0, dlen))
1092                         BUG();
1093                 HWGROUP(drive)->rq = NULL;
1094                 spin_unlock_irqrestore(&ide_lock, flags);
1095         } else {
1096                 if (!uptodate)
1097                         rq->cmd_flags |= REQ_FAILED;
1098                 cdrom_end_request(drive, uptodate);
1099         }
1100         return ide_stopped;
1101 }
1102
1103 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
1104 {
1105         struct cdrom_info *cd = drive->driver_data;
1106         int write = rq_data_dir(rq) == WRITE;
1107         unsigned short sectors_per_frame =
1108                 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
1109
1110         if (write) {
1111                 /* disk has become write protected */
1112                 if (cd->disk->policy) {
1113                         cdrom_end_request(drive, 0);
1114                         return ide_stopped;
1115                 }
1116         } else {
1117                 /*
1118                  * We may be retrying this request after an error.  Fix up any
1119                  * weirdness which might be present in the request packet.
1120                  */
1121                 restore_request(rq);
1122         }
1123
1124         /* use DMA, if possible / writes *must* be hardware frame aligned */
1125         if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
1126             (rq->sector & (sectors_per_frame - 1))) {
1127                 if (write) {
1128                         cdrom_end_request(drive, 0);
1129                         return ide_stopped;
1130                 }
1131                 cd->dma = 0;
1132         } else
1133                 cd->dma = drive->using_dma;
1134
1135         if (write)
1136                 cd->devinfo.media_written = 1;
1137
1138         return ide_started;
1139 }
1140
1141 static ide_startstop_t cdrom_do_newpc_cont(ide_drive_t *drive)
1142 {
1143         struct request *rq = HWGROUP(drive)->rq;
1144
1145         return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
1146 }
1147
1148 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
1149 {
1150         struct cdrom_info *info = drive->driver_data;
1151
1152         if (blk_pc_request(rq))
1153                 rq->cmd_flags |= REQ_QUIET;
1154         else
1155                 rq->cmd_flags &= ~REQ_FAILED;
1156
1157         info->dma = 0;
1158
1159         /* sg request */
1160         if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) {
1161                 struct request_queue *q = drive->queue;
1162                 unsigned int alignment;
1163                 unsigned long addr;
1164                 unsigned long stack_mask = ~(THREAD_SIZE - 1);
1165
1166                 if (rq->bio)
1167                         addr = (unsigned long)bio_data(rq->bio);
1168                 else
1169                         addr = (unsigned long)rq->data;
1170
1171                 info->dma = drive->using_dma;
1172
1173                 /*
1174                  * check if dma is safe
1175                  *
1176                  * NOTE! The "len" and "addr" checks should possibly have
1177                  * separate masks.
1178                  */
1179                 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
1180                 if (addr & alignment || rq->data_len & alignment)
1181                         info->dma = 0;
1182
1183                 if (!((addr & stack_mask) ^
1184                       ((unsigned long)current->stack & stack_mask)))
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 (info->cd_flags & IDE_CD_FLAG_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 & SEEK_STAT) != SEEK_STAT) {
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                         info->cd_flags &= ~IDE_CD_FLAG_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, 0, 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                 __u32 lba;
1300                 __u32 blocklen;
1301         } capbuf;
1302
1303         int stat;
1304         unsigned char cmd[BLK_MAX_CDB];
1305         unsigned len = sizeof(capbuf);
1306
1307         memset(cmd, 0, BLK_MAX_CDB);
1308         cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1309
1310         stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
1311                                REQ_QUIET);
1312         if (stat == 0) {
1313                 *capacity = 1 + be32_to_cpu(capbuf.lba);
1314                 *sectors_per_frame =
1315                         be32_to_cpu(capbuf.blocklen) >> SECTOR_BITS;
1316         }
1317
1318         return stat;
1319 }
1320
1321 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1322                                 int format, char *buf, int buflen,
1323                                 struct request_sense *sense)
1324 {
1325         unsigned char cmd[BLK_MAX_CDB];
1326
1327         memset(cmd, 0, BLK_MAX_CDB);
1328
1329         cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1330         cmd[6] = trackno;
1331         cmd[7] = (buflen >> 8);
1332         cmd[8] = (buflen & 0xff);
1333         cmd[9] = (format << 6);
1334
1335         if (msf_flag)
1336                 cmd[1] = 2;
1337
1338         return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
1339 }
1340
1341 /* Try to read the entire TOC for the disk into our internal buffer. */
1342 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1343 {
1344         int stat, ntracks, i;
1345         struct cdrom_info *info = drive->driver_data;
1346         struct cdrom_device_info *cdi = &info->devinfo;
1347         struct atapi_toc *toc = info->toc;
1348         struct {
1349                 struct atapi_toc_header hdr;
1350                 struct atapi_toc_entry  ent;
1351         } ms_tmp;
1352         long last_written;
1353         unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1354
1355         if (toc == NULL) {
1356                 /* try to allocate space */
1357                 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1358                 if (toc == NULL) {
1359                         printk(KERN_ERR "%s: No cdrom TOC buffer!\n",
1360                                         drive->name);
1361                         return -ENOMEM;
1362                 }
1363                 info->toc = toc;
1364         }
1365
1366         /*
1367          * Check to see if the existing data is still valid. If it is,
1368          * just return.
1369          */
1370         (void) cdrom_check_status(drive, sense);
1371
1372         if (info->cd_flags & IDE_CD_FLAG_TOC_VALID)
1373                 return 0;
1374
1375         /* try to get the total cdrom capacity and sector size */
1376         stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1377                                    sense);
1378         if (stat)
1379                 toc->capacity = 0x1fffff;
1380
1381         set_capacity(info->disk, toc->capacity * sectors_per_frame);
1382         /* save a private copy of the TOC capacity for error handling */
1383         drive->probed_capacity = toc->capacity * sectors_per_frame;
1384
1385         blk_queue_hardsect_size(drive->queue,
1386                                 sectors_per_frame << SECTOR_BITS);
1387
1388         /* first read just the header, so we know how long the TOC is */
1389         stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1390                                     sizeof(struct atapi_toc_header), sense);
1391         if (stat)
1392                 return stat;
1393
1394         if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) {
1395                 toc->hdr.first_track = BCD2BIN(toc->hdr.first_track);
1396                 toc->hdr.last_track  = BCD2BIN(toc->hdr.last_track);
1397         }
1398
1399         ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1400         if (ntracks <= 0)
1401                 return -EIO;
1402         if (ntracks > MAX_TRACKS)
1403                 ntracks = MAX_TRACKS;
1404
1405         /* now read the whole schmeer */
1406         stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1407                                   (char *)&toc->hdr,
1408                                    sizeof(struct atapi_toc_header) +
1409                                    (ntracks + 1) *
1410                                    sizeof(struct atapi_toc_entry), sense);
1411
1412         if (stat && toc->hdr.first_track > 1) {
1413                 /*
1414                  * Cds with CDI tracks only don't have any TOC entries, despite
1415                  * of this the returned values are
1416                  * first_track == last_track = number of CDI tracks + 1,
1417                  * so that this case is indistinguishable from the same layout
1418                  * plus an additional audio track. If we get an error for the
1419                  * regular case, we assume a CDI without additional audio
1420                  * tracks. In this case the readable TOC is empty (CDI tracks
1421                  * are not included) and only holds the Leadout entry.
1422                  *
1423                  * Heiko Eißfeldt.
1424                  */
1425                 ntracks = 0;
1426                 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1427                                            (char *)&toc->hdr,
1428                                            sizeof(struct atapi_toc_header) +
1429                                            (ntracks + 1) *
1430                                            sizeof(struct atapi_toc_entry),
1431                                            sense);
1432                 if (stat)
1433                         return stat;
1434
1435                 if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) {
1436                         toc->hdr.first_track = (u8)BIN2BCD(CDROM_LEADOUT);
1437                         toc->hdr.last_track = (u8)BIN2BCD(CDROM_LEADOUT);
1438                 } else {
1439                         toc->hdr.first_track = CDROM_LEADOUT;
1440                         toc->hdr.last_track = CDROM_LEADOUT;
1441                 }
1442         }
1443
1444         if (stat)
1445                 return stat;
1446
1447         toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1448
1449         if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) {
1450                 toc->hdr.first_track = BCD2BIN(toc->hdr.first_track);
1451                 toc->hdr.last_track  = BCD2BIN(toc->hdr.last_track);
1452         }
1453
1454         for (i = 0; i <= ntracks; i++) {
1455                 if (info->cd_flags & IDE_CD_FLAG_TOCADDR_AS_BCD) {
1456                         if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD)
1457                                 toc->ent[i].track = BCD2BIN(toc->ent[i].track);
1458                         msf_from_bcd(&toc->ent[i].addr.msf);
1459                 }
1460                 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1461                                                   toc->ent[i].addr.msf.second,
1462                                                   toc->ent[i].addr.msf.frame);
1463         }
1464
1465         if (toc->hdr.first_track != CDROM_LEADOUT) {
1466                 /* read the multisession information */
1467                 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1468                                            sizeof(ms_tmp), sense);
1469                 if (stat)
1470                         return stat;
1471
1472                 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1473         } else {
1474                 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1475                 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1476                 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1477         }
1478
1479         if (info->cd_flags & IDE_CD_FLAG_TOCADDR_AS_BCD) {
1480                 /* re-read multisession information using MSF format */
1481                 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1482                                            sizeof(ms_tmp), sense);
1483                 if (stat)
1484                         return stat;
1485
1486                 msf_from_bcd(&ms_tmp.ent.addr.msf);
1487                 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1488                                                    ms_tmp.ent.addr.msf.second,
1489                                                    ms_tmp.ent.addr.msf.frame);
1490         }
1491
1492         toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1493
1494         /* now try to get the total cdrom capacity */
1495         stat = cdrom_get_last_written(cdi, &last_written);
1496         if (!stat && (last_written > toc->capacity)) {
1497                 toc->capacity = last_written;
1498                 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1499                 drive->probed_capacity = toc->capacity * sectors_per_frame;
1500         }
1501
1502         /* Remember that we've read this stuff. */
1503         info->cd_flags |= IDE_CD_FLAG_TOC_VALID;
1504
1505         return 0;
1506 }
1507
1508 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1509 {
1510         struct cdrom_info *info = drive->driver_data;
1511         struct cdrom_device_info *cdi = &info->devinfo;
1512         struct packet_command cgc;
1513         int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1514
1515         if ((info->cd_flags & IDE_CD_FLAG_FULL_CAPS_PAGE) == 0)
1516                 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1517
1518         init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1519         do {
1520                 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1521                 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1522                 if (!stat)
1523                         break;
1524         } while (--attempts);
1525         return stat;
1526 }
1527
1528 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1529 {
1530         struct cdrom_info *cd = drive->driver_data;
1531         u16 curspeed, maxspeed;
1532
1533         curspeed = *(u16 *)&buf[8 + 14];
1534         maxspeed = *(u16 *)&buf[8 +  8];
1535
1536         if (cd->cd_flags & IDE_CD_FLAG_LE_SPEED_FIELDS) {
1537                 curspeed = le16_to_cpu(curspeed);
1538                 maxspeed = le16_to_cpu(maxspeed);
1539         } else {
1540                 curspeed = be16_to_cpu(curspeed);
1541                 maxspeed = be16_to_cpu(maxspeed);
1542         }
1543
1544         cd->current_speed = (curspeed + (176/2)) / 176;
1545         cd->max_speed = (maxspeed + (176/2)) / 176;
1546 }
1547
1548 #define IDE_CD_CAPABILITIES \
1549         (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1550          CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1551          CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1552          CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1553          CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1554
1555 static struct cdrom_device_ops ide_cdrom_dops = {
1556         .open                   = ide_cdrom_open_real,
1557         .release                = ide_cdrom_release_real,
1558         .drive_status           = ide_cdrom_drive_status,
1559         .media_changed          = ide_cdrom_check_media_change_real,
1560         .tray_move              = ide_cdrom_tray_move,
1561         .lock_door              = ide_cdrom_lock_door,
1562         .select_speed           = ide_cdrom_select_speed,
1563         .get_last_session       = ide_cdrom_get_last_session,
1564         .get_mcn                = ide_cdrom_get_mcn,
1565         .reset                  = ide_cdrom_reset,
1566         .audio_ioctl            = ide_cdrom_audio_ioctl,
1567         .capability             = IDE_CD_CAPABILITIES,
1568         .generic_packet         = ide_cdrom_packet,
1569 };
1570
1571 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1572 {
1573         struct cdrom_info *info = drive->driver_data;
1574         struct cdrom_device_info *devinfo = &info->devinfo;
1575
1576         devinfo->ops = &ide_cdrom_dops;
1577         devinfo->speed = info->current_speed;
1578         devinfo->capacity = nslots;
1579         devinfo->handle = drive;
1580         strcpy(devinfo->name, drive->name);
1581
1582         if (info->cd_flags & IDE_CD_FLAG_NO_SPEED_SELECT)
1583                 devinfo->mask |= CDC_SELECT_SPEED;
1584
1585         devinfo->disk = info->disk;
1586         return register_cdrom(devinfo);
1587 }
1588
1589 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1590 {
1591         struct cdrom_info *cd = drive->driver_data;
1592         struct cdrom_device_info *cdi = &cd->devinfo;
1593         u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1594         mechtype_t mechtype;
1595         int nslots = 1;
1596
1597         cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1598                      CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1599                      CDC_MO_DRIVE | CDC_RAM);
1600
1601         if (drive->media == ide_optical) {
1602                 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1603                 printk(KERN_ERR "%s: ATAPI magneto-optical drive\n",
1604                                 drive->name);
1605                 return nslots;
1606         }
1607
1608         if (cd->cd_flags & IDE_CD_FLAG_PRE_ATAPI12) {
1609                 cd->cd_flags &= ~IDE_CD_FLAG_NO_EJECT;
1610                 cdi->mask &= ~CDC_PLAY_AUDIO;
1611                 return nslots;
1612         }
1613
1614         /*
1615          * We have to cheat a little here. the packet will eventually be queued
1616          * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1617          * Since this device hasn't been registered with the Uniform layer yet,
1618          * it can't do this. Same goes for cdi->ops.
1619          */
1620         cdi->handle = drive;
1621         cdi->ops = &ide_cdrom_dops;
1622
1623         if (ide_cdrom_get_capabilities(drive, buf))
1624                 return 0;
1625
1626         if ((buf[8 + 6] & 0x01) == 0)
1627                 cd->cd_flags |= IDE_CD_FLAG_NO_DOORLOCK;
1628         if (buf[8 + 6] & 0x08)
1629                 cd->cd_flags &= ~IDE_CD_FLAG_NO_EJECT;
1630         if (buf[8 + 3] & 0x01)
1631                 cdi->mask &= ~CDC_CD_R;
1632         if (buf[8 + 3] & 0x02)
1633                 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1634         if (buf[8 + 2] & 0x38)
1635                 cdi->mask &= ~CDC_DVD;
1636         if (buf[8 + 3] & 0x20)
1637                 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1638         if (buf[8 + 3] & 0x10)
1639                 cdi->mask &= ~CDC_DVD_R;
1640         if ((buf[8 + 4] & 0x01) || (cd->cd_flags & IDE_CD_FLAG_PLAY_AUDIO_OK))
1641                 cdi->mask &= ~CDC_PLAY_AUDIO;
1642
1643         mechtype = buf[8 + 6] >> 5;
1644         if (mechtype == mechtype_caddy || mechtype == mechtype_popup)
1645                 cdi->mask |= CDC_CLOSE_TRAY;
1646
1647         if (cdi->sanyo_slot > 0) {
1648                 cdi->mask &= ~CDC_SELECT_DISC;
1649                 nslots = 3;
1650         } else if (mechtype == mechtype_individual_changer ||
1651                    mechtype == mechtype_cartridge_changer) {
1652                 nslots = cdrom_number_of_slots(cdi);
1653                 if (nslots > 1)
1654                         cdi->mask &= ~CDC_SELECT_DISC;
1655         }
1656
1657         ide_cdrom_update_speed(drive, buf);
1658
1659         printk(KERN_INFO "%s: ATAPI", drive->name);
1660
1661         /* don't print speed if the drive reported 0 */
1662         if (cd->max_speed)
1663                 printk(KERN_CONT " %dX", cd->max_speed);
1664
1665         printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1666
1667         if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1668                 printk(KERN_CONT " DVD%s%s",
1669                                  (cdi->mask & CDC_DVD_R) ? "" : "-R",
1670                                  (cdi->mask & CDC_DVD_RAM) ? "" : "-RAM");
1671
1672         if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1673                 printk(KERN_CONT " CD%s%s",
1674                                  (cdi->mask & CDC_CD_R) ? "" : "-R",
1675                                  (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1676
1677         if ((cdi->mask & CDC_SELECT_DISC) == 0)
1678                 printk(KERN_CONT " changer w/%d slots", nslots);
1679         else
1680                 printk(KERN_CONT " drive");
1681
1682         printk(KERN_CONT ", %dkB Cache\n", be16_to_cpu(*(u16 *)&buf[8 + 12]));
1683
1684         return nslots;
1685 }
1686
1687 /* standard prep_rq_fn that builds 10 byte cmds */
1688 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1689 {
1690         int hard_sect = queue_hardsect_size(q);
1691         long block = (long)rq->hard_sector / (hard_sect >> 9);
1692         unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1693
1694         memset(rq->cmd, 0, BLK_MAX_CDB);
1695
1696         if (rq_data_dir(rq) == READ)
1697                 rq->cmd[0] = GPCMD_READ_10;
1698         else
1699                 rq->cmd[0] = GPCMD_WRITE_10;
1700
1701         /*
1702          * fill in lba
1703          */
1704         rq->cmd[2] = (block >> 24) & 0xff;
1705         rq->cmd[3] = (block >> 16) & 0xff;
1706         rq->cmd[4] = (block >>  8) & 0xff;
1707         rq->cmd[5] = block & 0xff;
1708
1709         /*
1710          * and transfer length
1711          */
1712         rq->cmd[7] = (blocks >> 8) & 0xff;
1713         rq->cmd[8] = blocks & 0xff;
1714         rq->cmd_len = 10;
1715         return BLKPREP_OK;
1716 }
1717
1718 /*
1719  * Most of the SCSI commands are supported directly by ATAPI devices.
1720  * This transform handles the few exceptions.
1721  */
1722 static int ide_cdrom_prep_pc(struct request *rq)
1723 {
1724         u8 *c = rq->cmd;
1725
1726         /* transform 6-byte read/write commands to the 10-byte version */
1727         if (c[0] == READ_6 || c[0] == WRITE_6) {
1728                 c[8] = c[4];
1729                 c[5] = c[3];
1730                 c[4] = c[2];
1731                 c[3] = c[1] & 0x1f;
1732                 c[2] = 0;
1733                 c[1] &= 0xe0;
1734                 c[0] += (READ_10 - READ_6);
1735                 rq->cmd_len = 10;
1736                 return BLKPREP_OK;
1737         }
1738
1739         /*
1740          * it's silly to pretend we understand 6-byte sense commands, just
1741          * reject with ILLEGAL_REQUEST and the caller should take the
1742          * appropriate action
1743          */
1744         if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1745                 rq->errors = ILLEGAL_REQUEST;
1746                 return BLKPREP_KILL;
1747         }
1748
1749         return BLKPREP_OK;
1750 }
1751
1752 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1753 {
1754         if (blk_fs_request(rq))
1755                 return ide_cdrom_prep_fs(q, rq);
1756         else if (blk_pc_request(rq))
1757                 return ide_cdrom_prep_pc(rq);
1758
1759         return 0;
1760 }
1761
1762 struct cd_list_entry {
1763         const char      *id_model;
1764         const char      *id_firmware;
1765         unsigned int    cd_flags;
1766 };
1767
1768 #ifdef CONFIG_IDE_PROC_FS
1769 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1770 {
1771         unsigned long capacity, sectors_per_frame;
1772
1773         if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1774                 return 0;
1775
1776         return capacity * sectors_per_frame;
1777 }
1778
1779 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1780                                         int count, int *eof, void *data)
1781 {
1782         ide_drive_t *drive = data;
1783         int len;
1784
1785         len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1786         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1787 }
1788
1789 static ide_proc_entry_t idecd_proc[] = {
1790         { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1791         { NULL, 0, NULL, NULL }
1792 };
1793
1794 static void ide_cdrom_add_settings(ide_drive_t *drive)
1795 {
1796         ide_add_setting(drive, "dsc_overlap", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1,
1797                         &drive->dsc_overlap, NULL);
1798 }
1799 #else
1800 static inline void ide_cdrom_add_settings(ide_drive_t *drive) { ; }
1801 #endif
1802
1803 static const struct cd_list_entry ide_cd_quirks_list[] = {
1804         /* Limit transfer size per interrupt. */
1805         { "SAMSUNG CD-ROM SCR-2430", NULL,   IDE_CD_FLAG_LIMIT_NFRAMES      },
1806         { "SAMSUNG CD-ROM SCR-2432", NULL,   IDE_CD_FLAG_LIMIT_NFRAMES      },
1807         /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1808         { "SAMSUNG CD-ROM SCR-3231", NULL,   IDE_CD_FLAG_NO_SPEED_SELECT    },
1809         /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1810         { "NEC CD-ROM DRIVE:260",    "1.01", IDE_CD_FLAG_TOCADDR_AS_BCD |
1811                                              IDE_CD_FLAG_PRE_ATAPI12,       },
1812         /* Vertos 300, some versions of this drive like to talk BCD. */
1813         { "V003S0DS",                NULL,   IDE_CD_FLAG_VERTOS_300_SSD,    },
1814         /* Vertos 600 ESD. */
1815         { "V006E0DS",                NULL,   IDE_CD_FLAG_VERTOS_600_ESD,    },
1816         /*
1817          * Sanyo 3 CD changer uses a non-standard command for CD changing
1818          * (by default standard ATAPI support for CD changers is used).
1819          */
1820         { "CD-ROM CDR-C3 G",         NULL,   IDE_CD_FLAG_SANYO_3CD          },
1821         { "CD-ROM CDR-C3G",          NULL,   IDE_CD_FLAG_SANYO_3CD          },
1822         { "CD-ROM CDR_C36",          NULL,   IDE_CD_FLAG_SANYO_3CD          },
1823         /* Stingray 8X CD-ROM. */
1824         { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_CD_FLAG_PRE_ATAPI12},
1825         /*
1826          * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1827          * mode sense page capabilities size, but older drives break.
1828          */
1829         { "ATAPI CD ROM DRIVE 50X MAX", NULL,   IDE_CD_FLAG_FULL_CAPS_PAGE  },
1830         { "WPI CDS-32X",                NULL,   IDE_CD_FLAG_FULL_CAPS_PAGE  },
1831         /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1832         { "",                        "241N", IDE_CD_FLAG_LE_SPEED_FIELDS    },
1833         /*
1834          * Some drives used by Apple don't advertise audio play
1835          * but they do support reading TOC & audio datas.
1836          */
1837         { "MATSHITADVD-ROM SR-8187", NULL,   IDE_CD_FLAG_PLAY_AUDIO_OK      },
1838         { "MATSHITADVD-ROM SR-8186", NULL,   IDE_CD_FLAG_PLAY_AUDIO_OK      },
1839         { "MATSHITADVD-ROM SR-8176", NULL,   IDE_CD_FLAG_PLAY_AUDIO_OK      },
1840         { "MATSHITADVD-ROM SR-8174", NULL,   IDE_CD_FLAG_PLAY_AUDIO_OK      },
1841         { "Optiarc DVD RW AD-5200A", NULL,   IDE_CD_FLAG_PLAY_AUDIO_OK      },
1842         { NULL, NULL, 0 }
1843 };
1844
1845 static unsigned int ide_cd_flags(struct hd_driveid *id)
1846 {
1847         const struct cd_list_entry *cle = ide_cd_quirks_list;
1848
1849         while (cle->id_model) {
1850                 if (strcmp(cle->id_model, id->model) == 0 &&
1851                     (cle->id_firmware == NULL ||
1852                      strstr(id->fw_rev, cle->id_firmware)))
1853                         return cle->cd_flags;
1854                 cle++;
1855         }
1856
1857         return 0;
1858 }
1859
1860 static int ide_cdrom_setup(ide_drive_t *drive)
1861 {
1862         struct cdrom_info *cd = drive->driver_data;
1863         struct cdrom_device_info *cdi = &cd->devinfo;
1864         struct hd_driveid *id = drive->id;
1865         int nslots;
1866
1867         blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
1868         blk_queue_dma_alignment(drive->queue, 31);
1869         blk_queue_update_dma_pad(drive->queue, 15);
1870         drive->queue->unplug_delay = (1 * HZ) / 1000;
1871         if (!drive->queue->unplug_delay)
1872                 drive->queue->unplug_delay = 1;
1873
1874         drive->special.all      = 0;
1875
1876         cd->cd_flags = IDE_CD_FLAG_MEDIA_CHANGED | IDE_CD_FLAG_NO_EJECT |
1877                        ide_cd_flags(id);
1878
1879         if ((id->config & 0x0060) == 0x20)
1880                 cd->cd_flags |= IDE_CD_FLAG_DRQ_INTERRUPT;
1881
1882         if ((cd->cd_flags & IDE_CD_FLAG_VERTOS_300_SSD) &&
1883             id->fw_rev[4] == '1' && id->fw_rev[6] <= '2')
1884                 cd->cd_flags |= (IDE_CD_FLAG_TOCTRACKS_AS_BCD |
1885                                  IDE_CD_FLAG_TOCADDR_AS_BCD);
1886         else if ((cd->cd_flags & IDE_CD_FLAG_VERTOS_600_ESD) &&
1887                  id->fw_rev[4] == '1' && id->fw_rev[6] <= '2')
1888                 cd->cd_flags |= IDE_CD_FLAG_TOCTRACKS_AS_BCD;
1889         else if (cd->cd_flags & IDE_CD_FLAG_SANYO_3CD)
1890                 /* 3 => use CD in slot 0 */
1891                 cdi->sanyo_slot = 3;
1892
1893         nslots = ide_cdrom_probe_capabilities(drive);
1894
1895         /* set correct block size */
1896         blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
1897
1898         drive->dsc_overlap = (drive->next != drive);
1899
1900         if (ide_cdrom_register(drive, nslots)) {
1901                 printk(KERN_ERR "%s: %s failed to register device with the"
1902                                 " cdrom driver.\n", drive->name, __func__);
1903                 cd->devinfo.handle = NULL;
1904                 return 1;
1905         }
1906         ide_cdrom_add_settings(drive);
1907         return 0;
1908 }
1909
1910 static void ide_cd_remove(ide_drive_t *drive)
1911 {
1912         struct cdrom_info *info = drive->driver_data;
1913
1914         ide_proc_unregister_driver(drive, info->driver);
1915
1916         del_gendisk(info->disk);
1917
1918         ide_cd_put(info);
1919 }
1920
1921 static void ide_cd_release(struct kref *kref)
1922 {
1923         struct cdrom_info *info = to_ide_cd(kref);
1924         struct cdrom_device_info *devinfo = &info->devinfo;
1925         ide_drive_t *drive = info->drive;
1926         struct gendisk *g = info->disk;
1927
1928         kfree(info->toc);
1929         if (devinfo->handle == drive)
1930                 unregister_cdrom(devinfo);
1931         drive->dsc_overlap = 0;
1932         drive->driver_data = NULL;
1933         blk_queue_prep_rq(drive->queue, NULL);
1934         g->private_data = NULL;
1935         put_disk(g);
1936         kfree(info);
1937 }
1938
1939 static int ide_cd_probe(ide_drive_t *);
1940
1941 static ide_driver_t ide_cdrom_driver = {
1942         .gen_driver = {
1943                 .owner          = THIS_MODULE,
1944                 .name           = "ide-cdrom",
1945                 .bus            = &ide_bus_type,
1946         },
1947         .probe                  = ide_cd_probe,
1948         .remove                 = ide_cd_remove,
1949         .version                = IDECD_VERSION,
1950         .media                  = ide_cdrom,
1951         .supports_dsc_overlap   = 1,
1952         .do_request             = ide_cd_do_request,
1953         .end_request            = ide_end_request,
1954         .error                  = __ide_error,
1955 #ifdef CONFIG_IDE_PROC_FS
1956         .proc                   = idecd_proc,
1957 #endif
1958 };
1959
1960 static int idecd_open(struct inode *inode, struct file *file)
1961 {
1962         struct gendisk *disk = inode->i_bdev->bd_disk;
1963         struct cdrom_info *info;
1964         int rc = -ENOMEM;
1965
1966         info = ide_cd_get(disk);
1967         if (!info)
1968                 return -ENXIO;
1969
1970         rc = cdrom_open(&info->devinfo, inode, file);
1971
1972         if (rc < 0)
1973                 ide_cd_put(info);
1974
1975         return rc;
1976 }
1977
1978 static int idecd_release(struct inode *inode, struct file *file)
1979 {
1980         struct gendisk *disk = inode->i_bdev->bd_disk;
1981         struct cdrom_info *info = ide_cd_g(disk);
1982
1983         cdrom_release(&info->devinfo, file);
1984
1985         ide_cd_put(info);
1986
1987         return 0;
1988 }
1989
1990 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1991 {
1992         struct packet_command cgc;
1993         char buffer[16];
1994         int stat;
1995         char spindown;
1996
1997         if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1998                 return -EFAULT;
1999
2000         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
2001
2002         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
2003         if (stat)
2004                 return stat;
2005
2006         buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
2007         return cdrom_mode_select(cdi, &cgc);
2008 }
2009
2010 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
2011 {
2012         struct packet_command cgc;
2013         char buffer[16];
2014         int stat;
2015         char spindown;
2016
2017         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
2018
2019         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
2020         if (stat)
2021                 return stat;
2022
2023         spindown = buffer[11] & 0x0f;
2024         if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
2025                 return -EFAULT;
2026         return 0;
2027 }
2028
2029 static int idecd_ioctl(struct inode *inode, struct file *file,
2030                         unsigned int cmd, unsigned long arg)
2031 {
2032         struct block_device *bdev = inode->i_bdev;
2033         struct cdrom_info *info = ide_cd_g(bdev->bd_disk);
2034         int err;
2035
2036         switch (cmd) {
2037         case CDROMSETSPINDOWN:
2038                 return idecd_set_spindown(&info->devinfo, arg);
2039         case CDROMGETSPINDOWN:
2040                 return idecd_get_spindown(&info->devinfo, arg);
2041         default:
2042                 break;
2043         }
2044
2045         err = generic_ide_ioctl(info->drive, file, bdev, cmd, arg);
2046         if (err == -EINVAL)
2047                 err = cdrom_ioctl(file, &info->devinfo, inode, cmd, arg);
2048
2049         return err;
2050 }
2051
2052 static int idecd_media_changed(struct gendisk *disk)
2053 {
2054         struct cdrom_info *info = ide_cd_g(disk);
2055         return cdrom_media_changed(&info->devinfo);
2056 }
2057
2058 static int idecd_revalidate_disk(struct gendisk *disk)
2059 {
2060         struct cdrom_info *info = ide_cd_g(disk);
2061         struct request_sense sense;
2062
2063         ide_cd_read_toc(info->drive, &sense);
2064
2065         return  0;
2066 }
2067
2068 static struct block_device_operations idecd_ops = {
2069         .owner                  = THIS_MODULE,
2070         .open                   = idecd_open,
2071         .release                = idecd_release,
2072         .ioctl                  = idecd_ioctl,
2073         .media_changed          = idecd_media_changed,
2074         .revalidate_disk        = idecd_revalidate_disk
2075 };
2076
2077 /* module options */
2078 static char *ignore;
2079
2080 module_param(ignore, charp, 0400);
2081 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
2082
2083 static int ide_cd_probe(ide_drive_t *drive)
2084 {
2085         struct cdrom_info *info;
2086         struct gendisk *g;
2087         struct request_sense sense;
2088
2089         if (!strstr("ide-cdrom", drive->driver_req))
2090                 goto failed;
2091         if (!drive->present)
2092                 goto failed;
2093         if (drive->media != ide_cdrom && drive->media != ide_optical)
2094                 goto failed;
2095         /* skip drives that we were told to ignore */
2096         if (ignore != NULL) {
2097                 if (strstr(ignore, drive->name)) {
2098                         printk(KERN_INFO "ide-cd: ignoring drive %s\n",
2099                                          drive->name);
2100                         goto failed;
2101                 }
2102         }
2103         info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
2104         if (info == NULL) {
2105                 printk(KERN_ERR "%s: Can't allocate a cdrom structure\n",
2106                                 drive->name);
2107                 goto failed;
2108         }
2109
2110         g = alloc_disk(1 << PARTN_BITS);
2111         if (!g)
2112                 goto out_free_cd;
2113
2114         ide_init_disk(g, drive);
2115
2116         ide_proc_register_driver(drive, &ide_cdrom_driver);
2117
2118         kref_init(&info->kref);
2119
2120         info->drive = drive;
2121         info->driver = &ide_cdrom_driver;
2122         info->disk = g;
2123
2124         g->private_data = &info->driver;
2125
2126         drive->driver_data = info;
2127
2128         g->minors = 1;
2129         g->driverfs_dev = &drive->gendev;
2130         g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
2131         if (ide_cdrom_setup(drive)) {
2132                 ide_proc_unregister_driver(drive, &ide_cdrom_driver);
2133                 ide_cd_release(&info->kref);
2134                 goto failed;
2135         }
2136
2137         ide_cd_read_toc(drive, &sense);
2138         g->fops = &idecd_ops;
2139         g->flags |= GENHD_FL_REMOVABLE;
2140         add_disk(g);
2141         return 0;
2142
2143 out_free_cd:
2144         kfree(info);
2145 failed:
2146         return -ENODEV;
2147 }
2148
2149 static void __exit ide_cdrom_exit(void)
2150 {
2151         driver_unregister(&ide_cdrom_driver.gen_driver);
2152 }
2153
2154 static int __init ide_cdrom_init(void)
2155 {
2156         return driver_register(&ide_cdrom_driver.gen_driver);
2157 }
2158
2159 MODULE_ALIAS("ide:*m-cdrom*");
2160 MODULE_ALIAS("ide-cd");
2161 module_init(ide_cdrom_init);
2162 module_exit(ide_cdrom_exit);
2163 MODULE_LICENSE("GPL");